CN118954374A - An electric drive system and electric forklift thereof - Google Patents
An electric drive system and electric forklift thereof Download PDFInfo
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- CN118954374A CN118954374A CN202411452522.5A CN202411452522A CN118954374A CN 118954374 A CN118954374 A CN 118954374A CN 202411452522 A CN202411452522 A CN 202411452522A CN 118954374 A CN118954374 A CN 118954374A
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- axle structure
- structure assembly
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- 230000005540 biological transmission Effects 0.000 claims abstract description 129
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 11
- 230000001360 synchronised effect Effects 0.000 claims description 60
- 238000009434 installation Methods 0.000 claims description 56
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 208000032370 Secondary transmission Diseases 0.000 claims description 5
- 238000004146 energy storage Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 8
- 230000006872 improvement Effects 0.000 description 9
- 238000004891 communication Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of fluid gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07509—Braking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07513—Details concerning the chassis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07568—Steering arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/08—Masts; Guides; Chains
- B66F9/082—Masts; Guides; Chains inclinable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
- B66F9/122—Platforms; Forks; Other load supporting or gripping members longitudinally movable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/205—Arrangements for transmitting pneumatic, hydraulic or electric power to movable parts or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/24—Electrical devices or systems
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
本发明涉及电动叉车技术领域，尤其提供一种电动驱动系统及其电动叉车。该电动驱动系统包括电动轮式装载机车架、右前轮驱动桥结构总成、液压阀组、液压泵电机、液压蓄能器组、右后轮驱动桥结构总成、左后轮驱动桥结构总成、液压油箱及左前轮驱动桥结构总成。本发明能够提高传统电动驱动系统的传动效率，减少由于效率低下造成的能量损耗，并利用电动驱动系统中并联的四象限液压泵马达能够相对独立运行这一特性，其应用于电动叉车中，使得其车体布局更加灵活合理，其控制方式更加灵活，并能提高车辆操控稳定性，另外，能够精确调节货叉组件的长度和角度，实现精确定位和稳定搬运，减少了货物在搬运过程中的晃动和滑落风险。
The present invention relates to the technical field of electric forklifts, and in particular, provides an electric drive system and an electric forklift thereof. The electric drive system comprises an electric wheel loader frame, a right front wheel drive axle structure assembly, a hydraulic valve group, a hydraulic pump motor, a hydraulic accumulator group, a right rear wheel drive axle structure assembly, a left rear wheel drive axle structure assembly, a hydraulic oil tank and a left front wheel drive axle structure assembly. The present invention can improve the transmission efficiency of the traditional electric drive system, reduce the energy loss caused by low efficiency, and utilize the characteristic that the four-quadrant hydraulic pump motor in parallel in the electric drive system can operate relatively independently. The present invention is applied to an electric forklift, making its body layout more flexible and reasonable, its control method more flexible, and can improve the vehicle handling stability. In addition, the length and angle of the fork assembly can be accurately adjusted to achieve precise positioning and stable handling, reducing the risk of shaking and sliding of the goods during the handling process.
Description
Technical Field
The invention relates to the technical field of electric forklifts, and particularly provides an electric driving system and an electric forklifts thereof.
Background
The battery forklift is a forklift which uses a storage battery as source power to drive a running motor and an oil pressure system motor so as to realize running and loading and unloading operations, and the hydraulic pump in the oil pressure system of the existing battery forklift still needs to keep running continuously to maintain the system pressure even when the operation such as lifting is not needed under a plurality of operation conditions, so that extra power consumption is caused, larger parasitic power is easy to generate, the vehicle generates extra energy consumption, the overall energy efficiency of the electric forklift is reduced, delay or instability occurs when the operation of quick response and accurate control is needed in the carrying process, and the safe carrying and the operation precision of cargoes are influenced.
Disclosure of Invention
Based on this, it is necessary to provide an electric driving system and an electric forklift thereof to solve at least one technical problem in the background art.
An electric drive system comprises an electric wheel loader frame, a right front wheel drive axle structure assembly, a hydraulic valve group, a hydraulic pump motor, a hydraulic accumulator group, a right rear wheel drive axle structure assembly, a left rear wheel drive axle structure assembly, a hydraulic oil tank and a left front wheel drive axle structure assembly, wherein the right front wheel drive axle structure assembly, the hydraulic valve group, the hydraulic pump motor, the hydraulic accumulator group, the right rear wheel drive axle structure assembly, the left rear wheel drive axle structure assembly, the hydraulic oil tank and the left front wheel drive axle structure assembly are all arranged in the electric wheel loader frame, the right front wheel drive axle structure assembly, the hydraulic valve group, the hydraulic pump motor, the hydraulic accumulator group, the right rear wheel drive axle structure assembly, the left rear wheel drive axle structure assembly, the hydraulic oil tank and the left front wheel drive axle structure assembly are connected with each other through hydraulic pipelines, and the right front wheel drive axle structure assembly, the right rear wheel drive axle structure assembly, the left rear wheel drive axle structure assembly and the left front wheel drive axle structure assembly are connected with the frame of the electric wheel loader through mechanical structures; the right front wheel drive axle structure assembly, the right rear wheel drive axle structure assembly, the left rear wheel drive axle structure assembly and the left front wheel drive axle structure assembly are composed of four-quadrant hydraulic pump motors and drive axles, the four-quadrant hydraulic pump motors are used for providing driving power, and the drive axles comprise main speed reducers, wheel edge speed reducers, clutches, brakes and input shafts.
As a further improvement of the invention, a steering braking mechanism is arranged in the frame of the electric wheel loader, and comprises a steering system, a service mechanical braking system and a parking braking system.
As a further improvement of the invention, the hydraulic accumulator group comprises a first hydraulic accumulator and a second hydraulic accumulator, wherein the four-quadrant hydraulic pump motors of the first hydraulic accumulator, the right front wheel drive axle structure assembly, the right rear wheel drive axle structure assembly, the left rear wheel drive axle structure assembly and the left front wheel drive axle structure assembly are respectively connected with the hydraulic valve group through hydraulic pipelines, so that the hydraulic valve group can independently control the four-quadrant hydraulic pump motors, a priority valve is arranged in the hydraulic valve group, and the priority valve is respectively connected with the steering brake mechanism and the second hydraulic accumulator through the hydraulic pipelines.
The utility model provides an electric fork truck, includes fork truck automobile body, connection regulation subassembly, fork subassembly and an electric drive system, an electric drive system installs in the fork truck automobile body, and connection regulation subassembly installs in the fork truck automobile body outside, and fork subassembly installs in connection regulation subassembly bottom.
As a further improvement of the invention, a hollow cavity is arranged in the forklift body, preset grooves are respectively concavely formed in two ends of the bottom outside the hollow cavity, adjusting hydraulic cylinders are respectively arranged on two sides of the bottom surface of the hollow cavity, an output shaft of each adjusting hydraulic cylinder penetrates through the preset grooves to be convexly arranged outside the forklift body, a hydraulic adjusting rotating shaft is rotatably arranged at the bottom outside the forklift body, adjusting connecting plates are respectively arranged at two ends of the hydraulic adjusting rotating shaft, and the two adjusting hydraulic cylinders are respectively connected with a hydraulic valve group through hydraulic pipelines.
As a further improvement of the invention, the connection adjusting assembly comprises a connection adjusting frame, two vertical adjusting cylinders, a fork vertical installation frame and a connection installation frame, wherein the bottom of the inner side of the connection adjusting frame is convexly provided with a connection installation transverse plate, the two ends of the inner side of the connection installation transverse plate are respectively convexly provided with an adjustment installation rotary table, the two adjustment installation rotary tables are respectively and rotatably connected with the outer sides of the two adjustment connecting plates, the inner side of the connection adjusting frame is concavely provided with an installation cavity, the two ends of the installation cavity are respectively and concavely provided with a vertical installation sliding groove, the middle parts of the two ends of the connection adjusting frame are respectively and convexly provided with the connection installation rotary tables, the two connection installation rotary tables are respectively and rotatably connected with output shafts of the two adjustment hydraulic cylinders, the bottom ends of the two vertical adjustment rotary tables are respectively and slidably installed in the two vertical installation sliding grooves, the two ends of the inner side top of the fork vertical installation frame are respectively connected with the bottom ends of the two vertical adjustment rotary tables, and the connection installation frame is installed at the bottom of the outer side of the fork vertical installation frame.
As a further improvement of the invention, the fork assembly comprises two fork elements, a first driving motor, a second driving motor, a first synchronous transmission element and a second synchronous transmission element, wherein the inner ends of the two fork elements are respectively arranged at two ends of the outer side bottom of the connecting installation frame, the first driving motor and the second driving motor are respectively arranged at the bottoms of the two fork elements, the first driving motor and the second driving motor are arranged in a staggered way, the first synchronous transmission element is arranged in the two fork elements, and the second synchronous transmission element is arranged in the two fork elements.
As a further improvement of the invention, each fork element comprises a fixed fork, a first-stage movable fork and a second-stage movable fork, the inner end of the fixed fork is arranged at one end of the outer side bottom of the connecting installation frame, a transmission cavity is formed in the fixed fork, first rotating holes are respectively concavely formed in the two sides of the inner end of the transmission cavity, second rotating holes are respectively concavely formed in the two sides of the outer end of the transmission cavity, a plurality of transmission rotating shafts are arranged in the middle of the transmission cavity along the length direction, first rotating gears are respectively arranged on each transmission rotating shaft, the plurality of first rotating gears are in meshed connection with each other, a first movable sliding groove is concavely formed in the top end of the transmission cavity, the bottom of the first-stage movable fork is slidably arranged in the first movable sliding groove, a communicating groove is concavely formed in the bottom surface of the first-stage movable fork, a straight rack is convexly arranged on the top surface of the communicating groove, a second transmission shaft is respectively concavely arranged in the middle of the two ends of the communicating groove, a second-stage transmission wheel is respectively arranged in the middle of the transmission shaft, a second movable sliding seat is arranged on the top surface of the first-stage movable fork, a second-stage movable seat is convexly arranged on the top surface of each third-stage movable fork, a second-stage movable seat is arranged in the bottom surface of the third-stage movable seat, and a second stage movable seat is slidably arranged in the second stage movable seat.
As a further improvement of the invention, the first driving motor is arranged at the inner end of the bottom surface of one fixed fork, the second driving motor is arranged at the outer end of the bottom surface of the other fixed fork, the first synchronous transmission element comprises a first synchronous transmission shaft and two second rotating gears, one end of the first synchronous transmission shaft is rotatably arranged in a first rotating hole of one fixed fork, the other end of the first synchronous transmission shaft is rotatably arranged in a first rotating hole of the other fixed fork, one end of the first synchronous transmission shaft is provided with a first linkage wheel, a first transmission belt is sleeved between the first linkage wheel and the output shaft of the first driving motor so as to realize transmission connection, the two second rotating gears are respectively arranged at two ends of the first synchronous transmission shaft, and the two second rotating gears are respectively meshed with the first rotating gears positioned at the inner ends in the two fixed forks.
As a further improvement of the invention, the second synchronous transmission element comprises a second synchronous transmission shaft and two third transmission wheels, one end of the second synchronous transmission shaft is arranged in a second rotation hole of one fixed fork, the other end of the second synchronous transmission shaft is arranged in a second rotation hole of the other fixed fork, one end of the second synchronous transmission shaft is provided with a second coupling wheel, a second transmission belt is sleeved between the second coupling wheel and an output shaft of the second driving motor so as to realize transmission connection, two third transmission wheels are respectively arranged at two ends of the second synchronous transmission shaft, and a third transmission belt is sleeved among the third transmission wheels, the two secondary transmission wheels and the two tertiary transmission wheels so as to realize transmission connection, and the clamping block is clamped and arranged on the third transmission belt.
The beneficial effects of the invention are as follows:
1. according to the invention, the hydraulic pump motor, the hydraulic valve group, the hydraulic accumulator group and the four-quadrant hydraulic pump motors are matched, so that the transmission efficiency of a traditional electric driving system is improved, the energy loss caused by low efficiency is reduced, and the characteristic that the four-quadrant hydraulic pump motors connected in parallel in the electric driving system can operate relatively independently is utilized. In addition, by utilizing the characteristic of four-quadrant operation of the four-quadrant hydraulic pump motor, the kinetic energy during the braking of the system can be recovered and stored for reuse.
2. The invention can accurately adjust the length and angle of the fork assembly, realize accurate positioning and stable carrying, reduce the shaking and sliding risks of cargoes in the carrying process, reduce the potential safety hazards caused by instable cargoes through the cooperation of the hydraulic system and the air cylinder, and effectively and rapidly adjust the length of the fork so as to adapt to cargoes with different sizes, thereby improving the carrying flexibility and applicability, improving the operation efficiency and safety of the forklift and enabling the cargo carrying process to be more efficient and reliable.
Drawings
Fig. 1 is a top view of an electric drive system in accordance with the present invention.
Fig. 2 is a bottom view of the electric drive system of the present invention.
Fig. 3 is a flow chart of the hydraulic circuit of the electric drive system of the present invention.
Fig. 4 is a schematic perspective view of an electric forklift in the present invention.
Fig. 5 is an internal schematic view of the electric forklift in the present invention.
FIG. 6 is a rear side view of a fork assembly in accordance with one embodiment of the present invention.
FIG. 7 is a front side view of a fork assembly in accordance with one embodiment of the present invention.
FIG. 8 is an internal schematic view of a fork assembly according to one embodiment of the present invention.
FIG. 9 is an internal schematic view of a fork assembly according to another embodiment of the present invention.
In the figure:
10. An electric wheel loader frame; 11. a right front wheel drive axle structure assembly; 12. a hydraulic valve block; 13. a hydraulic pump motor; 14. a hydraulic accumulator set; 15. a right rear wheel drive axle structure assembly; 16. a left rear wheel drive axle structure assembly; 17. a hydraulic oil tank; 18. a left front wheel drive axle structure assembly; 20. a four-quadrant hydraulic pump motor; 21. a drive axle; 41. a steering system; 42. a service mechanical brake system; 43. a parking brake system; 141. a first hydraulic accumulator; 140. a second hydraulic accumulator; 30. a priority valve; 50. a forklift body; 51. a hollow cavity; 52. presetting a groove; 53. adjusting a hydraulic cylinder; 54. a hydraulic adjusting rotating shaft; 55. adjusting the connecting plate; 60. connecting an adjusting component; 61. connecting an adjusting frame; 62. a vertical adjusting cylinder; 63. a fork vertical mounting rack; 64. connecting the mounting frame; 611. connecting and installing a transverse plate; 612. adjusting and installing a turntable; 613. a rotary table is connected and installed; 614. a chute is vertically installed; 70. a fork assembly; 71. a fork element; 72. a first driving motor; 73. a second driving motor; 74. a first synchronous drive element; 75. a second synchronous drive element; 711. fixing the fork; 712. a first-stage moving fork; 713. a second-stage moving fork; 714. a transmission cavity; 715. a first rotation hole; 716. a second rotation hole; 717. a transmission rotating shaft; 718. a first rotating gear; 719. a first moving chute; 761. a communication groove; 762. a transmission mounting groove; 763. a secondary transmission shaft; 764. a secondary transmission wheel; 765. a second movable chute; 767. a second-stage preset groove; 741. a first synchronous drive shaft; 742. a second rotating gear; 743. a first linkage wheel; 751. a second synchronous drive shaft; 752. a third driving wheel; 753. and a second coupling wheel.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of the present invention, it should be noted that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, an electric driving system includes an electric wheel loader frame 10, a right front wheel driving axle structure assembly 11, a hydraulic valve bank 12, a hydraulic pump motor 13, a hydraulic accumulator bank 14, a right rear wheel driving axle structure assembly 15, a left rear wheel driving axle structure assembly 16, a hydraulic oil tank 17 and a left front wheel driving axle structure assembly 18, wherein the right front wheel driving axle structure assembly 11, the hydraulic valve bank 12, the hydraulic pump motor 13, the hydraulic accumulator bank 14, the right rear wheel driving axle structure assembly 15, the left rear wheel driving axle structure assembly 16, the hydraulic oil tank 17 and the left front wheel driving axle structure assembly 18 are all installed in the electric wheel loader frame 10, and the right front wheel driving axle structure assembly 11, the hydraulic valve bank 12, the hydraulic pump motor 13, the hydraulic accumulator bank 14, the right rear wheel driving axle structure assembly 15, the left rear wheel driving axle structure assembly 16, the hydraulic oil tank 17 and the left front wheel driving axle structure assembly 18 are mutually connected through hydraulic pipelines, and the right front wheel driving axle structure assembly 11, the right rear wheel driving axle structure assembly 15, the left rear wheel driving axle structure assembly 16 and the left front wheel driving axle structure assembly 16 are connected with the electric wheel loader frame 10 through hydraulic pipelines;
The right front wheel drive axle structure assembly 11, the right rear wheel drive axle structure assembly 15, the left rear wheel drive axle structure assembly 16 and the left front wheel drive axle structure assembly 18 are all composed of a four-quadrant hydraulic pump motor 20 and a drive axle 21, the four-quadrant hydraulic pump motor 20 is used for providing driving power, and the drive axle 21 comprises a main speed reducer, a wheel-side speed reducer, a clutch, a brake and an input shaft.
A steering brake mechanism is provided in the electric wheel loader frame 10, and includes a steering system 41, a service mechanical brake system 42, and a parking brake system 43.
The four-quadrant hydraulic pump motors 20 of the right front wheel drive axle structure assembly 11, the right rear wheel drive axle structure assembly 15, the left rear wheel drive axle structure assembly 16 and the left front wheel drive axle structure assembly 18 are respectively connected with the hydraulic valve group 12 through hydraulic pipelines, so that the hydraulic valve group 12 can independently control the four-quadrant hydraulic pump motors 20, a priority valve 30 is arranged in the hydraulic valve group 12, and the priority valve 30 is connected with a steering braking mechanism through the hydraulic pipelines.
For example, in one embodiment: the four-quadrant hydraulic pump motor 20 has a four-quadrant operation function, and can function as a driving mechanism or an energy recovery mechanism for recovering braking energy.
For example, in one embodiment: when the electric forklift is started to perform forward or backward operation, the hydraulic pump motor 13 is started, and the hydraulic valve group 12 is utilized to distribute power to the four-quadrant hydraulic pump motors 20, and then the driving axle 21 transmits power to the tires to perform forward or backward operation.
When the vehicle needs to be braked and stopped, the hydraulic pump motor 13 stops outputting hydraulic power, so that the four-quadrant hydraulic pump motors 20 are switched to the pump working condition, part of braking energy is recycled to the first hydraulic accumulator 141, and when the next time energy needs to be output, the first hydraulic accumulator 141 can provide hydraulic power for the hydraulic valve group 12 to release the hydraulic power to drive the four-quadrant hydraulic pump motors 20 to work.
For example, in one embodiment: when the four-quadrant hydraulic pump motors 20 are difficult to meet the braking requirement in the braking process of the vehicle, the hydraulic pump motors 13 can provide hydraulic energy for the brakes through the priority valves 30, so that the brakes provide a part of walking mechanical braking to participate in the braking of the vehicle, and the safety in the running process of the vehicle is ensured. Meanwhile, the hydraulic pump motor 13 supplies hydraulic energy to the steering system 41 through the priority valve 30 to control the steering of the vehicle, and the priority valve 30 is used to ensure that the output power of the hydraulic pump motor 13 is preferentially supplied to the steering system 41 and the brake, so as to avoid dangerous situations.
For example, in one embodiment: when hydraulic energy provided by the hydraulic pump motor 13 is lost due to an emergency failure of the vehicle, the second hydraulic accumulator 140 will be activated and the stored hydraulic power will be directly input into the steering brake mechanism to ensure that there is sufficient hydraulic energy for steering and braking the vehicle.
For example, in one embodiment: when the vehicle turns, the differential speed and torque between the wheels can be ensured by controlling the hydraulic valve group 12 to output different hydraulic energy and controlling different displacement of each four-quadrant hydraulic pump motor 20, so that the electric forklift is ensured not to skid when running and working normally, and larger parasitic power is generated, and energy loss is caused.
In summary, the invention utilizes the cooperation of the hydraulic pump motor 13, the hydraulic valve group 12, the hydraulic accumulator group 14 and the four-quadrant hydraulic pump motors 20 to realize the improvement of the transmission efficiency of the electric driving system, reduce the energy loss caused by low efficiency, and utilizes the characteristic that the four-quadrant hydraulic pump motors 20 connected in parallel in the electric driving system can operate relatively independently, thereby being applied to the electric forklift, leading the layout of the forklift to be more flexible and reasonable, enhancing the environmental adaptability, leading the control mode to be more flexible, effectively enhancing the utilization efficiency of the ground attachment condition and improving the control stability of the vehicle. Further, by utilizing the characteristic of four-quadrant operation of the four-quadrant hydraulic pump motor 20, kinetic energy at the time of braking of the system can be recovered and stored for reuse.
Referring to fig. 4 to 9, an electric forklift includes a forklift body 50, a connection adjusting assembly 60, a fork assembly 70 and an electric driving system, wherein the electric driving system is installed in the forklift body 50, the connection adjusting assembly 60 is installed on the outer side of the forklift body 50, and the fork assembly 70 is installed at the bottom of the connection adjusting assembly 60.
The inside cavity 51 that is provided with of fork truck automobile body 50, cavity 51 outside bottom both ends are concave to be equipped with respectively and predetermine groove 52, and cavity 51 bottom surface both sides rotate respectively and are provided with the regulation pneumatic cylinder 53, and the output shaft of adjusting pneumatic cylinder 53 wears to establish to locate outside fork truck automobile body 50 through predetermining groove 52 is protruding, and fork truck automobile body 50 outside bottom rotates and is provided with hydraulic pressure regulation pivot 54, and hydraulic pressure regulation pivot 54 both ends are provided with respectively and adjust connecting plate 55, and two regulation pneumatic cylinders 53 are connected with hydraulic pressure valves 12 through the hydraulic pressure pipeline respectively.
The connection adjusting assembly 60 comprises a connection adjusting frame 61, two vertical adjusting cylinders 62, a fork vertical installation frame 63 and a connection installation frame 64, wherein a connection installation transverse plate 611 is convexly arranged at the bottom of the inner side of the connection adjusting frame 61, an adjustment installation rotary table 612 is convexly arranged at the two ends of the inner side of the connection installation transverse plate 611 respectively, the two adjustment installation rotary tables 612 are respectively connected with the outer sides of the two adjustment connecting plates 55 in a rotating mode, an installation cavity is concavely arranged at the inner side of the connection adjusting frame 61, vertical installation sliding grooves 614 are concavely arranged at the two ends of the installation cavity respectively, connection installation rotary tables 613 are convexly arranged at the middle parts of the two ends of the connection adjusting frame 61 respectively, the two connection installation rotary tables 613 are respectively connected with the output shafts of the two adjustment hydraulic cylinders 53 in a rotating mode, the bottom ends of the two vertical adjusting cylinders 62 are respectively installed at the two ends of the connection installation transverse plate 611, the two ends of the fork vertical installation frame 63 are respectively slidably installed in the two vertical installation sliding grooves 614, and the two ends of the inner side of the fork vertical installation frame 63 are respectively connected with the top ends of the two vertical adjusting cylinders 62, and the connection installation frame 64 is installed at the bottom of the outer side of the fork vertical installation frame 63.
The fork assembly 70 includes two fork elements 71, a first driving motor 72, a second driving motor 73, a first synchronous transmission element 74 and a second synchronous transmission element 75, the inner ends of the two fork elements 71 are respectively installed at two ends of the outer side bottom of the connection mounting frame 64, the first driving motor 72 and the second driving motor 73 are respectively installed at the bottoms of the two fork elements 71, the first driving motor 72 and the second driving motor 73 are staggered, the first synchronous transmission element 74 is installed in the two fork elements 71, and the second synchronous transmission element 75 is installed in the two fork elements 71.
Each fork element 71 comprises a fixed fork 711, a first-stage movable fork 712 and a second-stage movable fork 713, the inner end of the fixed fork 711 is arranged at one end of the outer side bottom of the connecting mounting frame 64, a transmission cavity 714 is formed in the fixed fork 711 in a hollow manner, first rotating holes 715 are respectively concavely formed at two sides of the inner end of the transmission cavity 714, second rotating holes 716 are respectively concavely formed at two sides of the outer end of the transmission cavity 714, a plurality of transmission rotating shafts 717 are arranged in the middle of the transmission cavity 714 along the length direction, a first rotating gear 718 is arranged on each transmission rotating shaft 717, the plurality of first rotating gears 718 are in meshed connection, a first moving sliding groove 719 is concavely formed at the top end of the transmission cavity 714, the bottom of the first-stage movable fork 712 is slidably arranged in the first moving sliding groove 719, the bottom surface of the first-stage movable fork 712 is concavely provided with a communication groove 761, the top surface of the communication groove 761 is convexly provided with a straight rack, the straight rack is in meshed connection with a plurality of first rotating gears 718, the middle parts of two ends of the communication groove 761 are respectively concavely provided with a transmission installation groove 762, the transmission installation groove 762 is rotationally provided with a second-stage transmission shaft 763, the middle part of the second-stage transmission shaft 763 is provided with a second-stage transmission wheel 764, the top surface of the first-stage movable fork 712 is concavely provided with a second movable chute 765, two ends of the top surface of the second movable chute 765 are respectively convexly provided with a jacking seat, the top end of each jacking seat is rotationally provided with a third-stage transmission wheel, the bottom of the second-stage movable fork 713 is slidingly installed in the second movable chute 765, the bottom surface of the second-stage movable fork 713 is concavely provided with a second-stage preset groove 767, and the inner end of the second-stage preset groove 767 is provided with a clamping block.
The first driving motor 72 is installed at the inner end of the bottom surface of one fixed fork 711, the second driving motor 73 is installed at the outer end of the bottom surface of the other fixed fork 711, the first synchronous transmission element 74 comprises a first synchronous transmission shaft 741 and two second rotating gears 742, one end of the first synchronous transmission shaft 741 is rotatably installed in the first rotating hole 715 of one fixed fork 711, the other end of the first synchronous transmission shaft 741 is rotatably installed in the first rotating hole 715 of the other fixed fork 711, one end of the first synchronous transmission shaft 741 is provided with a first linkage wheel 743, a first transmission belt is sleeved between the first linkage wheel 743 and the output shaft of the first driving motor 72 so as to realize transmission connection, the two second rotating gears 742 are respectively installed at two ends of the first synchronous transmission shaft 741, and the two second rotating gears 742 are respectively meshed with the first rotating gears 718 positioned at the inner ends of the two fixed forks 711.
The second synchronous transmission element 75 comprises a second synchronous transmission shaft 751 and two third transmission wheels 752, one end of the second synchronous transmission shaft 751 is installed in a second rotation hole 716 of one fixed fork 711, the other end of the second synchronous transmission shaft 751 is installed in a second rotation hole 716 of the other fixed fork 711, one end of the second synchronous transmission shaft 751 is provided with a second coupling wheel 753, a second transmission belt is sleeved between the second coupling wheel 753 and an output shaft of the second driving motor 73 so as to realize transmission connection, the two third transmission wheels 752 are installed at two ends of the second synchronous transmission shaft 751 respectively, a third transmission belt is sleeved among the third transmission wheel 752, the two secondary transmission wheels 764 and the two tertiary transmission wheels so as to realize transmission connection, and a clamping block is clamped and installed on the third transmission belt.
For example, in one embodiment: when the adjustment according to the cargo length is required, the first driving motor 72 is started first, and the power is transmitted to the first linkage wheel 743 by the first driving belt, so that the first synchronous driving shaft 741 rotates, the two second rotating gears 742 rotate in a following manner, the first rotating gears 718 in the two fixed forks 711 rotate in a following manner, and the first moving fork 712 moves along the first moving chute 719 due to the meshed connection of the straight racks and the first rotating gears 718, so that the length of the fork element 71 is adjusted.
When the length of the fork element 71 still needs to be increased, the second driving motor 73 is started, so that the second synchronous transmission shaft 751 rotates, the two third driving wheels 752 rotate in a following manner, the third driving belt moves in a following manner, the clamping block moves in a following manner, the two-stage moving fork 713 moves along the second moving chute 765 in a following manner, and the length of the fork element 71 is further adjusted, so that various cargo lengths are guaranteed to be adapted to carrying operations.
When the goods need be carried and moved, two vertical adjustment cylinders 62 will start and then make fork vertical mounting bracket 63 and connection mounting bracket 64 follow vertical installation spout 614 and reciprocate, and then carry the goods, simultaneously, hydraulic pressure valves 12 carry hydraulic pressure to two adjustment hydraulic cylinders 53 and hydraulic pressure regulation pivot 54, make the output shaft of adjustment hydraulic cylinder 53 extend/retract, and make hydraulic pressure regulation pivot 54 rotate, make the regulation connecting plate 55 follow the removal, because two regulation installation revolving stage 612 of connection regulation frame 61 bottom rotate with two regulation connecting plate 55 outsides respectively and are connected, and then carry out tilting movement to connection regulation frame 61, and then make fork subassembly 70 follow the slope of shifting, make the goods slope inwards, realize carrying out accurate control to fork subassembly 70, stability of goods when guaranteeing electric fork truck and remove.
The installation process comprises the following steps: an electric driving system is installed in a forklift body 50, two adjusting installation rotary tables 612 are respectively and rotatably connected with the outer sides of two adjusting connection plates 55, two connecting installation rotary tables 613 are respectively and rotatably connected with output shafts of two adjusting hydraulic cylinders 53, the bottom ends of two vertical adjusting cylinders 62 are respectively installed at the two ends of the inner side top of a connecting installation cross plate 611, two ends of a fork vertical installation frame 63 are respectively and slidably installed in two vertical installation sliding grooves 614, the two ends of the inner side top of the fork vertical installation frame 63 are respectively connected with the top ends of two vertical adjusting cylinders 62, a connecting installation frame 64 is installed at the outer side bottom of the fork vertical installation frame 63, the inner ends of fixed forks 711 are installed at one end of the outer side bottom of the connecting installation frame 64, the bottom of a first-stage moving fork 712 is slidably installed in a first moving sliding groove 719, the bottom of a second-stage moving fork 713 is slidably installed in a second moving sliding groove 765, the first driving motor 72 is installed at the inner end of the bottom surface of one fixed fork 711, the second driving motor 73 is installed at the outer end of the bottom surface of the other fixed fork 711, one end of the first synchronous transmission shaft 741 is rotatably installed in the first rotation hole 715 of one fixed fork 711, the other end of the first synchronous transmission shaft 741 is rotatably installed in the first rotation hole 715 of the other fixed fork 711, two second rotation gears 742 are respectively installed at two ends of the first synchronous transmission shaft 741, the two second rotation gears 742 are respectively engaged with the first rotation gears 718 positioned at the inner ends of the two fixed forks 711, one end of the second synchronous transmission shaft 751 is installed in the second rotation hole 716 of one fixed fork 711, the other end of the second synchronous transmission shaft 751 is installed in the second rotation hole 716 of the other fixed fork 711, two third transmission gears 752 are respectively installed at two ends of the second synchronous transmission shaft 751, and the clamping block is clamped and arranged on the third transmission belt.
The invention can realize the following steps:
1. According to the invention, the hydraulic pump motor 13, the hydraulic valve group 12, the hydraulic accumulator group 14 and the four-quadrant hydraulic pump motors 20 are matched, so that the transmission efficiency of a traditional electric driving system is improved, the energy loss caused by low efficiency is reduced, and the characteristic that the four-quadrant hydraulic pump motors 20 connected in parallel in the electric driving system can operate relatively independently is utilized. Further, by utilizing the characteristic of four-quadrant operation of the four-quadrant hydraulic pump motor 20, kinetic energy at the time of braking of the system can be recovered and stored for reuse.
2. The invention can accurately adjust the length and angle of the fork assembly 70, realize accurate positioning and stable carrying, reduce the shaking and sliding risks of cargoes in the carrying process, reduce the potential safety hazards caused by instable cargoes through the cooperation of the hydraulic system and the air cylinder, and effectively and rapidly adjust the fork length to adapt to cargoes with different sizes, thereby improving the carrying flexibility and applicability, improving the operation efficiency and safety of the forklift and enabling the cargo carrying process to be more efficient and reliable.
The above embodiments represent only a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. An electric drive system, characterized by: the hydraulic energy storage device comprises an electric wheel loader frame (10), a right front wheel drive axle structure assembly (11), a hydraulic valve bank (12), a hydraulic pump motor (13), a hydraulic energy accumulator group (14), a right rear wheel drive axle structure assembly (15), a left rear wheel drive axle structure assembly (16), a hydraulic oil tank (17) and a left front wheel drive axle structure assembly (18), wherein the right front wheel drive axle structure assembly (11), the hydraulic valve bank (12), the hydraulic pump motor (13), the hydraulic energy accumulator group (14), the right rear wheel drive axle structure assembly (15), the left rear wheel drive axle structure assembly (16), the hydraulic oil tank (17) and the left front wheel drive axle structure assembly (18) are all installed in the electric wheel loader frame (10), and the right front wheel drive axle structure assembly (11), the hydraulic valve bank (12), the hydraulic pump motor (13), the hydraulic energy accumulator group (14), the right rear wheel drive axle structure assembly (15), the left rear wheel drive axle structure assembly (16), the hydraulic oil tank (17) and the left front wheel drive axle structure assembly (18) are mutually connected through hydraulic pipelines, and the right front wheel drive axle structure assembly (11), the right rear wheel drive axle assembly (15), the left rear wheel drive axle structure assembly (16) and the left front wheel drive axle structure assembly (18) are connected with the electric wheel loader frame (10) through a mechanical structure;
The right front wheel drive axle structure assembly (11), the right rear wheel drive axle structure assembly (15), the left rear wheel drive axle structure assembly (16) and the left front wheel drive axle structure assembly (18) are composed of a four-quadrant hydraulic pump motor (20) and a drive axle (21), the four-quadrant hydraulic pump motor (20) is used for providing driving power, and the drive axle (21) comprises a main speed reducer, a wheel edge speed reducer, a clutch, a brake and an input shaft.
2. An electric drive system as set forth in claim 1 wherein: a steering brake mechanism is arranged in the electric wheel loader frame (10), and comprises a steering system (41), a service mechanical brake system (42) and a parking brake system (43).
3. An electric drive system as set forth in claim 2 wherein: the hydraulic energy accumulator group (14) comprises a first hydraulic energy accumulator (141) and a second hydraulic energy accumulator (140), wherein the first hydraulic energy accumulator (141), a right front wheel drive axle structure assembly (11), a right rear wheel drive axle structure assembly (15), a left rear wheel drive axle structure assembly (16) and a four-quadrant hydraulic pump motor (20) of a left front wheel drive axle structure assembly (18) are respectively connected with the hydraulic valve group (12) through hydraulic pipelines, so that the hydraulic valve group (12) can independently control the four-quadrant hydraulic pump motors (20), a priority valve (30) is arranged in the hydraulic valve group (12), and the priority valve (30) is respectively connected with a steering brake mechanism and the second hydraulic energy accumulator (140) through the hydraulic pipelines.
4. An electric forklift, characterized in that: an electric drive system comprising a forklift body (50), a connection adjusting assembly (60), a fork assembly (70) and any one of claims 1 to 3, wherein the electric drive system is installed in the forklift body (50), the connection adjusting assembly (60) is installed on the outer side of the forklift body (50), and the fork assembly (70) is installed at the bottom of the connection adjusting assembly (60).
5. The electric forklift of claim 4, wherein: inside cavity (51) that are provided with of fork truck automobile body (50), cavity (51) outside bottom both ends are concave respectively and are equipped with predetermine groove (52), cavity (51) bottom surface both sides are rotated respectively and are provided with regulation pneumatic cylinder (53), the output shaft of regulation pneumatic cylinder (53) wears to establish outside fork truck automobile body (50) through predetermining groove (52) protruding, fork truck automobile body (50) outside bottom rotation is provided with hydraulic pressure regulation pivot (54), hydraulic pressure regulation pivot (54) both ends are provided with respectively and adjust connecting plate (55), two regulation pneumatic cylinders (53) are connected with hydraulic valve group (12) through the hydraulic pressure pipeline respectively.
6. The electric forklift of claim 5, wherein: connect adjusting part (60) including connecting alignment jig (61), two vertical adjustment cylinder (62), fork vertical mounting bracket (63) and connection mounting bracket (64), connect alignment jig (61) inboard bottom protruding be equipped with connect install diaphragm (611), connect install diaphragm (611) inboard both ends protruding be equipped with respectively and adjust installation revolving stage (612), two adjust installation revolving stage (612) respectively with two regulation connecting plates (55) outside rotation are connected, connect alignment jig (61) inboard concave be equipped with the installation cavity, install cavity both ends respectively concave be equipped with vertical installation spout (614), connect alignment jig (61) both ends middle part protruding be equipped with respectively and connect installation revolving stage (613), two connect installation revolving stage (613) respectively with the output shaft rotation of two regulation pneumatic cylinders (53) be connected, install respectively in connect install diaphragm (611) inboard top both ends two vertical mounting bracket (63) both ends slidable mounting in two vertical installation spout (614), and fork vertical mounting bracket (63) inboard top both ends are connected with two vertical adjustment cylinder (62) top respectively, connect (64) in fork bottom outside vertical mounting bracket (63).
7. The electric forklift of claim 6, wherein: the fork assembly (70) comprises two fork elements (71), a first driving motor (72), a second driving motor (73), a first synchronous transmission element (74) and a second synchronous transmission element (75), wherein the inner ends of the two fork elements (71) are respectively arranged at two ends of the outer side bottom of the connecting installation frame (64), the first driving motor (72) and the second driving motor (73) are respectively arranged at the bottoms of the two fork elements (71), the first driving motor (72) and the second driving motor (73) are arranged in a staggered mode, the first synchronous transmission element (74) is arranged in the two fork elements (71), and the second synchronous transmission element (75) is arranged in the two fork elements (71).
8. The electric forklift of claim 7, wherein: each fork element (71) comprises a fixed fork (711), a first-stage movable fork (712) and a second-stage movable fork (713), the inner end of the fixed fork (711) is arranged at one end of the outer side of the connecting installation frame (64), a transmission cavity (714) is formed in the hollow part of the fixed fork (711), first rotating holes (715) are respectively concavely formed in two sides of the inner end of the transmission cavity (714), second rotating holes (716) are respectively concavely formed in two sides of the outer end of the transmission cavity (714), a plurality of transmission rotating shafts (717) are respectively concavely formed in the middle of the transmission cavity (714), first rotating gears (718) are respectively arranged on each transmission rotating shaft (717), the plurality of first rotating gears (718) are mutually meshed and connected, a first moving sliding groove (719) is concavely formed in the top end of the transmission cavity (714), a communicating groove (761) is formed in the bottom of the first-stage movable fork (712), a straight rack is convexly arranged on the communicating groove (761), a plurality of transmission rotating shafts (763) are respectively meshed with the two-stage rotating gears (763), two-stage rotating grooves (763) are respectively arranged at the two ends of the transmission rotating shafts (763), the top surface of the first-stage movable fork (712) is concavely provided with a second movable chute (765), two ends of the top surface of the second movable chute (765) are respectively convexly provided with jacking seats, the top end of each jacking seat is rotatably provided with a three-stage driving wheel, the bottom of the second-stage movable fork (713) is slidably mounted in the second movable chute (765), the bottom surface of the second-stage movable fork (713) is concavely provided with a second-stage preset groove (767), and the inner end of the second-stage preset groove (767) is provided with a clamping block.
9. The electric forklift of claim 8, wherein: the first driving motor (72) is arranged at the inner end of the bottom surface of one fixed fork (711), the second driving motor (73) is arranged at the outer end of the bottom surface of the other fixed fork (711), the first synchronous transmission element (74) comprises a first synchronous transmission shaft (741) and two second rotating gears (742), one end of the first synchronous transmission shaft (741) is rotatably arranged in the first rotating hole (715) of one fixed fork (711), the other end of the first synchronous transmission shaft (741) is rotatably arranged in the first rotating hole (715) of the other fixed fork (711), one end of the first synchronous transmission shaft (741) is provided with a first linkage wheel (743), a first transmission belt is sleeved between the first linkage wheel (743) and the output shaft of the first driving motor (72) so as to realize transmission connection, the two second rotating gears (742) are respectively arranged at two ends of the first synchronous transmission shaft (741), and the two second rotating gears (742) are respectively meshed with the first rotating gears (718) positioned at the inner ends of the two fixed forks (711).
10. The electric forklift of claim 9, wherein: the second synchronous transmission element (75) comprises a second synchronous transmission shaft (751) and two third transmission wheels (752), one end of the second synchronous transmission shaft (751) is installed in a second rotation hole (716) of one fixed fork (711), the other end of the second synchronous transmission shaft (751) is installed in a second rotation hole (716) of the other fixed fork (711), one end of the second synchronous transmission shaft (751) is provided with a second coupling wheel (753), a second transmission belt is sleeved between the second coupling wheel (753) and an output shaft of the second driving motor (73) so as to realize transmission connection, the two third transmission wheels (752) are installed at two ends of the second synchronous transmission shaft (751) respectively, a third transmission belt is sleeved among the third transmission wheels (752), the two secondary transmission wheels (764) and the two tertiary transmission wheels so as to realize transmission connection, and the clamping block is installed on the third transmission belt in a clamping mode.
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| CN202411452522.5A CN118954374B (en) | 2024-10-17 | 2024-10-17 | Electric forklift |
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| CN202411452522.5A CN118954374B (en) | 2024-10-17 | 2024-10-17 | Electric forklift |
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| CN118954374B (en) | 2025-02-11 |
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