CN218343265U - Power transmission system and engineering machinery - Google Patents

Abstract

The utility model provides a power transmission system and engineering machine tool, wherein power transmission system includes: an engine assembly comprising: an engine body; an output shaft connected with the engine body; the flywheel is connected with the output shaft and is used for being connected with the first load mechanism; and the power takeoff is connected to an output shaft between the engine body and the flywheel and is connected with the second load mechanism through an elastic coupling.

Description

Power transmission system and engineering machinery

Technical Field

The utility model relates to an engineering machine tool technical field particularly, relates to a power transmission system and an engineering machine tool.

Background

The power transmission system of the related art adopts a broken shaft power taking scheme, namely, an engine sequentially passes through a gearbox, a transmission shaft and a transfer case and then reaches an oil pump power transmission scheme, the scheme needs to transform an original chassis transmission shaft, the transfer case is additionally arranged between the transmission shafts, a transmission chain is longer, and the transmission efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to solve or improve at least one of the above technical problems, an object of the present invention is to provide a power transmission system.

Another object of the present invention is to provide an engineering machine with the above power transmission system.

To achieve the above object, a first aspect of the present invention provides a power transmission system, including: an engine assembly comprising: an engine body; an output shaft rotatably provided to the engine body; the flywheel is connected with the output shaft and is used for being connected with the first load mechanism; and the power takeoff is connected to an output shaft between the engine body and the flywheel and is connected with the second load mechanism through an elastic coupling.

According to the embodiment of the power transmission system provided by the utility model, because the second load mechanism is directly connected with the power takeoff through the elastic coupling, compared with the mode that other transmission structures are arranged between the second load mechanism and the power takeoff, on one hand, the transmission chain can be shortened, and the transmission efficiency is improved; on the other hand, the second load mechanism can be arranged at the rear end of the engine assembly, the position of the second load mechanism is favorable to being arranged in the front, the structure is more compact, and the integration level is higher.

The utility model provides a power transmission system includes power part, driving medium and executive component. Wherein, the output shaft of the engine assembly is a power part. The flywheel, the power takeoff and other devices or parts are transmission parts. The first load mechanism and the second load mechanism are actuators.

Specifically, the powertrain includes an engine assembly and a power take-off. The engine assembly comprises an engine body, an output shaft and a flywheel. The output shaft is connected with the engine body. Alternatively, the engine block is a crankshaft or the like in the engine assembly. The output shaft is rotatably arranged on the engine shell, namely the output shaft can rotate relative to the engine shell to output power. Further, the flywheel is connected with the output shaft. Optionally, the output shaft is disposed through the flywheel. The flywheel is adapted to be connected to a first load mechanism. The first load mechanism is used for realizing a traveling function of the construction machine. Optionally, the first load mechanism comprises an axle and a wheel body. The output shaft drives the first load mechanism to realize the running function through a flywheel, a gearbox and other devices or components.

Further, the power takeoff is connected to the output shaft between the engine body and the flywheel. In other words, the power take-off is connected to the output shaft at a position between the engine body and the flywheel. The power takeoff is connected with the second load mechanism through an elastic coupling. Because the power takeoff is connected with the output shaft at a position between the engine body and the flywheel, the power takeoff is closer to the engine body than to the flywheel. The second load mechanism is used as a power part in the pumping system and can drive the execution part to complete a specified action. Because the second load mechanism is directly connected with the power takeoff through the elastic coupling, compared with a mode that other transmission structures are arranged between the second load mechanism and the power takeoff, on one hand, the transmission chain can be shortened, and the transmission efficiency is improved; on the other hand, the second load mechanism can be arranged at the rear end of the engine assembly, the position of the second load mechanism is favorable to being arranged in the front, the structure is more compact, and the integration level is higher. Optionally, the second load mechanism comprises at least two pumps. The quantity of the pump body is at least two, carries out the flexibility according to actual demand to the pump body and sets up. Each pump body is provided with at least one transmission shaft, and the number of the transmission shafts is flexibly set according to actual requirements. Two adjacent transmission shafts are connected, and the transmission shafts are connected with a power takeoff. Optionally, adjacent drive shafts are connected in series to enable multiple pumps to be connected in series. Optionally, the number of the pump bodies is three, and the pump bodies specifically comprise a main oil pump, an arm support pump and a duplicate gear pump. The main oil pump, the arm support pump and the duplicate gear pump are connected in series. Each pump body can drive the corresponding execution part to complete the designated action. By arranging the elastic coupling, on one hand, the connection between a transmission shaft of the second load mechanism and the power takeoff can be realized, and the elastic coupling is used for transmitting torque; on the other hand, the torque fluctuation can be relieved to a certain extent, and a power transmission system is protected.

The working principle is as follows: when the device is in a working state, the output shaft transmits power to the second load mechanism through the power takeoff, and the second load mechanism works to drive the execution part to complete specified actions; when the engineering machine runs, the output shaft transmits power to the first load mechanism through structures such as a flywheel and the like, and the running function of the engineering machine is achieved.

In the technical scheme defined by the utility model, because the second load mechanism is directly connected with the power takeoff through the elastic coupling, compared with the mode that other transmission structures are arranged between the second load mechanism and the power takeoff, on one hand, the transmission chain can be shortened, and the transmission efficiency is improved; on the other hand, the second load mechanism can be arranged at the rear end of the engine assembly, the position of the second load mechanism is favorable to being arranged in the front, the structure is more compact, and the integration level is higher.

Additionally, the utility model provides an above-mentioned technical scheme can also have following additional technical characterstic:

in the above technical solution, the engine assembly further includes: the transmission gear and the power takeoff are in transmission connection with the output shaft through the transmission gear.

In this technical solution, the power transmission system further includes a transmission gear. Specifically, the power takeoff is in transmission connection with the output shaft through a transmission gear. It can be understood that the power takeoff is not connected with the flywheel, the position of the power takeoff connected with the transmission gear is closer to the output shaft relative to the position of the first clutch connected with the flywheel, the preposition of the second load mechanism is facilitated, the second load mechanism can be arranged at the rear end of the engine, the structure is compact, and the integration level is higher.

In the above technical solution, the second load mechanism includes at least two pump bodies.

In the technical scheme, the second load mechanism comprises at least two pump bodies, and the number of the pump bodies is flexibly set according to actual requirements by considering the size of the occupied space of the second load mechanism, the cost and other factors. Optionally, the second load mechanism specifically includes a main oil pump, an arm pump, and a double gear pump. Specifically, the main oil pump has a first shaft, the boom pump has a second shaft, and the dual gear pump has a third shaft. The first shaft, the second shaft and the third shaft are connected in series to realize the series connection of the main oil pump, the arm support pump and the duplicate gear pump. The first shaft is connected with a power takeoff through an elastic coupling. The second load mechanism is connected in series at the rear end of the engine assembly. Each pump body can drive the corresponding execution component to complete the designated action. The first shaft of the main oil pump is connected with a power takeoff. When the device is in a working state, the output shaft transmits power to the second load mechanism through the power takeoff, and the second load mechanism works to drive the execution part to complete specified actions. Optionally, the first shaft and the power take-off are connected by a resilient coupling.

In above-mentioned technical scheme, the power takeoff includes the flange, and elastic coupling includes: a first portion connected to the flange; the second part is connected with the first part, a buffer layer is arranged between the first part and the second part, and the second part is connected with the transmission shaft through a spline.

In this solution, the elastic coupling comprises a first part and a second part. Specifically, the power take-off comprises a flange. The first portion is connected to the flange. The second portion is connected to the first portion. The second portion is connected to the second load mechanism. Optionally, the second portion is splined to a drive shaft of the second load mechanism. The second part and the transmission shaft are relatively fixed in the circumferential direction, and the second part of the coupler can transmit torque to the transmission shaft of the pump body; the second part and the transmission shaft can slide relatively in the axial direction, the assembly fault tolerance rate is higher during installation, and the relative position of the second part and the transmission shaft can be adjusted according to actual requirements.

Optionally, the first portion is an outer race of the resilient coupling and the second portion is an inner race of the resilient coupling. The second portion is detachably connected with the first portion. Further, a buffer layer is arranged between the first part and the second part. Through setting up the buffer layer, can alleviate the moment of torsion fluctuation to a certain extent, protect power transmission system.

In the above technical solution, the method further comprises: and the first clutch is connected with the first load mechanism and the flywheel.

In this solution, the power transmission system further includes a first clutch. Specifically, the first clutch is connected to the first load mechanism, and the first clutch is connected to the flywheel. When the clutch is in a working state, the first clutch is separated, the power takeoff is engaged, the output shaft transmits power to the second load mechanism through the power takeoff, and the second load mechanism works to drive the execution part to complete a specified action; when the engineering machinery runs, the first clutch is engaged, the power takeoff is separated, and the output shaft transmits power to the first load mechanism through structures such as a gearbox, so that the running function of the engineering machinery is realized.

In the above technical solution, the method further comprises: and the gearbox is connected with the first clutch and the first load mechanism.

In this solution, the drivetrain further comprises a gearbox. Specifically, the gearbox is connected with a first clutch, and the gearbox is connected with a first load mechanism. The gearbox is used for shifting gears and changing speed to change the running speed. In other words, the output shaft drives the first load mechanism to realize the running function through a flywheel, a gearbox and other devices or components.

In the above technical solution, the method further comprises: and the transmission structure is connected with the gearbox, is connected with the first load mechanism and is a transmission shaft or a gear set.

In this solution, the power transmission system further includes a transmission structure. Specifically, the transmission structure is connected with the gearbox, and the transmission structure is connected with the first load mechanism. Through setting up transmission structure, can realize that the transmission of gearbox and first load mechanism is connected. The power of the engine is transmitted to the first load mechanism, and the running function of the engineering machinery is realized.

Further, the transmission structure is a transmission shaft or a gear set. Through setting up transmission structure into the transmission shaft, the gearbox passes through the transmission shaft with first load mechanism and realizes the transmission and be connected, and the transmission shaft plays the effect of transmission power. Through setting up transmission structure as the gear train, the gearbox passes through the gear train with first load mechanism and realizes the transmission and be connected, and the gear train plays the effect of transmission power.

In the above aspect, the first load mechanism includes: the axle is in transmission connection with the flywheel; the wheel body is connected with the axle.

In this aspect, the first load mechanism includes an axle and a wheel body. Specifically, the axle is also called an axle. The axle is in transmission connection with the flywheel. The output shaft transmits power to the axle through a flywheel, a gearbox and other devices or components. The wheel body is connected with the axle. Optionally, the number of wheels is multiple. Through setting up axle and wheel body, can realize engineering machine's function of traveling.

In the above technical solution, the method further comprises: the installation shell is connected with the engine body, and the elastic coupling is arranged in the installation shell.

In this solution, the drivetrain further comprises a mounting housing. Specifically, the mounting case is connected with the engine body. Optionally, the mounting shell is detachably connected with the engine body, so that the mounting shell is convenient to disassemble and assemble; or the mounting shell is connected with the engine body in a welding mode, so that the processing is convenient; or the mounting shell and the engine body are of an integrated structure, and compared with a post-processing mode, the mechanical property is good, the connection strength is higher, the number of parts is reduced, and the assembly efficiency is improved. Further, the elastic coupling is arranged in the mounting shell. The installation shell can protect the elastic coupling to a great extent, and impurities such as dust are effectively prevented from entering the elastic coupling.

A second aspect of the present invention provides an engineering machine including the power transmission system according to any one of the above embodiments.

According to an embodiment of the present invention, a construction machine comprises a power transmission system according to any of the above embodiments. Optionally, the construction machine further comprises a frame body, and the power transmission system is connected with the frame body. Specifically, an engine assembly of the power transmission system is connected with the frame body, a first load mechanism of the power transmission system is connected with the frame body, and a second load mechanism of the power transmission system is connected with the frame body.

It should be noted that the construction machine may be a construction vehicle such as a pump truck, or may be a construction device such as a vehicle-mounted pump.

The construction machine includes any one of the power transmission systems in the first aspect, so that the beneficial effects of any one of the embodiments are achieved, and are not described herein again.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

Fig. 1 shows a first schematic view of a drivetrain according to an embodiment of the invention;

fig. 2 shows a schematic view of a working machine according to an embodiment of the invention;

fig. 3 shows a second schematic view of a drivetrain according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

100: a power transmission system; 110: an engine assembly; 111: an engine body; 112: a first clutch; 114: a flange; 115: an output shaft; 116: a flywheel; 117: a transmission gear; 118: a power takeoff; 120: a first load mechanism; 121: an axle; 122: a wheel body; 130: a second load mechanism; 131: a main oil pump; 132: a first shaft; 133: a boom pump; 134: a second shaft; 135: a double gear pump; 136: a third axis; 140: an elastic coupling; 141: a first part; 142: a second section; 150: a gearbox; 160: a transmission structure; 170: a gear case; 180: mounting a shell; 200: an engineering machine; 210: a shelf body.

Detailed Description

In order to make the above objects, features and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

Referring now to fig. 1-3, a powertrain 100 and a work machine 200 provided in accordance with some embodiments of the present disclosure will be described.

The present invention provides a power transmission system 100 including a power member, a transmission member, and an actuator. The output shaft 115 is a power member. The devices or components such as the flywheel 116 and the power take-off 118 are transmission members. The first load mechanism 120 and the second load mechanism 130 are actuators.

Example one

As shown in fig. 1, 2 and 3, an embodiment of the present invention provides a powertrain 100 including an engine assembly 110 and a power take-off 118. The engine assembly 110 includes an engine body 111, an output shaft 115, and a flywheel 116. The output shaft 115 is connected to the engine body 111. Alternatively, the engine body 111 is a crankshaft or the like in the engine assembly 110. The output shaft 115 is rotatably provided to the engine case, i.e., the output shaft 115 can rotate relative to the engine case to output power. Further, a flywheel 116 is connected to the output shaft 115. Optionally, the output shaft 115 is disposed through the flywheel 116. The flywheel 116 is adapted to be coupled to a first load mechanism 120. The first load mechanism 120 is used to realize a traveling function of the work machine 200. Optionally, the first load mechanism 120 includes an axle 121 and a wheel body 122. The output shaft 115 drives the first load mechanism 120 to perform a traveling function through a flywheel 116, a transmission 150, and other devices or components.

Further, a power take-off 118 is connected to the output shaft 115 between the engine block 111 and the flywheel 116. In other words, the power take-off 118 is connected to a position in the output shaft 115 between the engine body 111 and the flywheel 116. The power take-off 118 is connected to the second load mechanism 130 via an elastic coupling 140. Because the power take-off 118 is connected to the output shaft 115 at a position between the engine body 111 and the flywheel 116, the power take-off 118 is located closer to the engine body 111 than the flywheel 116.

The second load mechanism 130 acts as a motive element in the pumping system and is capable of driving the actuator to perform a specified action. Because the second loading mechanism 130 is directly connected with the power takeoff 118 through the elastic coupling 140, compared with a mode that other transmission structures are arranged between the second loading mechanism 130 and the power takeoff 118, on one hand, a transmission chain can be shortened, and transmission efficiency is improved; on the other hand, the second load mechanism 130 can be disposed at the rear end of the engine assembly 110, which is beneficial to the front position of the second load mechanism 130, and the structure is more compact and the integration level is higher.

Optionally, the second load mechanism 130 includes at least two pumps. The quantity of the pump body is at least two, carries out the flexibility according to actual demand to the pump body and sets up. Each pump body is provided with at least one transmission shaft, and the number of the transmission shafts is flexibly set according to actual requirements. Two adjacent transmission shafts are connected, and the transmission shafts are connected with a power take-off 118. Optionally, adjacent drive shafts are connected in series to enable multiple pumps to be connected in series. Optionally, the number of the pump bodies is three, and specifically includes a main oil pump 131, an arm pump 133, and a double gear pump 135. The main oil pump 131, the arm support pump 133 and the duplicate gear pump 135 are connected in series. Each pump body can drive the corresponding execution part to complete the designated action. By providing the elastic coupling 140, on the one hand, the connection of the drive shaft of the second load mechanism 130 to the power take-off 118 can be realized for torque transmission; on the other hand, the torque fluctuation can be relieved to a certain extent, and a power transmission system is protected.

The working principle is as follows: in the working state, the output shaft 115 transmits power to the second load mechanism 130 through the power takeoff 118, and the second load mechanism 130 works to drive the execution part to complete a specified action; in the traveling state, the output shaft 115 transmits power to the first load mechanism 120 via a flywheel 116 or the like, thereby realizing the traveling function of the construction machine 200.

In the limited technical solution of the present invention, since the second load mechanism 130 is directly connected to the power takeoff 118 through the elastic coupling 140, compared with the way of providing other transmission structures between the second load mechanism 130 and the power takeoff 118, on one hand, the transmission chain can be shortened, and the transmission efficiency can be improved; on the other hand, the second load mechanism 130 can be disposed at the rear end of the engine assembly 110, which is beneficial to the forward position of the second load mechanism 130, and the structure is more compact and the integration level is higher.

Example two

As shown in FIG. 1, the motor assembly 110 also includes a drive gear 117. Specifically, the power take-off 118 is drivingly connected to the output shaft 115 via a transfer gear 117. It can be understood that the power take-off 118 is not connected to the flywheel 116, and the position where the power take-off 118 is connected to the transmission gear 117 is closer to the output shaft 115 than the position where the first clutch 112 is connected to the flywheel 116, which is advantageous for the front of the second load mechanism 130, and the second load mechanism 130 can be disposed at the rear end of the engine, which is compact and has higher integration.

In another embodiment, as shown in fig. 2 and 3, the second load mechanism 130 is an oil pump assembly, which includes at least two pump bodies, each having at least one transmission shaft, and two adjacent transmission shafts are connected, wherein one of the transmission shafts is connected to the power take-off 118 through an elastic coupling 140. The number of pump bodies is flexibly set according to actual requirements in consideration of the size of the occupied space of the second load mechanism 130, cost, and other factors. Optionally, the second load mechanism 130 specifically includes a main oil pump 131, an arm pump 133, and a double gear pump 135. Specifically, the main oil pump 131 has a first shaft 132, the boom pump 133 has a second shaft 134, and the double gear pump 135 has a third shaft 136. The first shaft 132, the second shaft 134 and the third shaft 136 are connected in series to realize the series connection of the main oil pump 131, the boom pump 133 and the double gear pump 135. The first shaft 132 is connected to the power take-off 118 by a resilient coupling 140. The second load mechanism 130 is connected in series at the rear end of the engine assembly 110. Each pump body can drive the corresponding execution part to complete the designated action. In the working state, the output shaft 115 transmits power to the second load mechanism 130 through the power takeoff 118, and the second load mechanism 130 works to drive the executing component to complete the designated action.

EXAMPLE III

As shown in fig. 3, the elastic coupling 140 includes a first portion 141 and a second portion 142. Specifically, the power take-off 118 includes a flange 114. The first portion 141 is connected to the flange 114. The second portion 142 is connected to the first portion 141. The second portion 142 is connected to the second load mechanism 130. Optionally, the second portion 142 is connected with the transmission shaft through a spline, the second portion 142 is relatively fixed with the transmission shaft in the circumferential direction, and the second portion 142 of the coupling can transmit torque to the transmission shaft of the pump body; the second part 142 and the transmission shaft can slide relatively in the axial direction, so that the assembly fault tolerance rate is higher during installation, and the relative position of the second part 142 and the transmission shaft can be adjusted according to actual requirements.

Alternatively, the first portion 141 is an outer race of the resilient coupling 140 and the second portion 142 is an inner race of the resilient coupling 140. The second portion 142 is detachably connected to the first portion 141. Further, a buffer layer is disposed between the first portion 141 and the second portion 142. Through setting up the buffer layer, can alleviate the moment of torsion fluctuation to a certain extent, protect power transmission system.

In another embodiment, as shown in fig. 2 and 3, drivetrain 100 further includes a mounting case 180. Specifically, the mounting case 180 is connected with the engine body 111. Optionally, the mounting shell 180 is detachably connected with the engine body 111, so that the mounting shell 180 is convenient to disassemble and assemble; or, the mounting shell 180 is connected with the engine body 111 in a welding manner, so that the processing is convenient; or, the mounting shell 180 and the engine body 111 are of an integrated structure, and compared with a post-processing mode, the mechanical property is good, the connection strength is higher, the number of parts is reduced, and the assembly efficiency is improved. Further, the elastic coupling 140 is provided in the mounting case 180. The mounting shell 180 can protect the elastic coupling 140 to a great extent, and effectively prevent impurities such as dust from entering the elastic coupling 140.

Example four

As shown in fig. 1 and 2, the powertrain 100 further includes a first clutch 112. Specifically, the first clutch 112 is connected to the transmission case 150, and the first clutch 112 is connected to the flywheel 116. In the working state, the first clutch 112 is separated, the power takeoff 118 is engaged, the output shaft 115 transmits power to the second loading mechanism 130 through the power takeoff 118, and the second loading mechanism 130 works to drive the execution part to complete the designated action; in the traveling state, the first clutch 112 is engaged, the power take-off 118 is disengaged, and the output shaft 115 transmits power to the first load mechanism 120 via the transmission 150 or the like, thereby realizing the traveling function of the construction machine 200.

Further, the powertrain 100 also includes a gearbox 150. Specifically, the transmission case 150 is connected with the first clutch 112, and the transmission case 150 is connected with the first load mechanism 120. The transmission 150 is used for shifting gears and changing speed to change the running speed. In other words, the output shaft 115 drives the first load mechanism 120 to perform a traveling function through a device or a component such as the flywheel 116 and the transmission 150.

Further, the powertrain system 100 also includes a transmission structure 160. Specifically, the transmission structure 160 is connected to the transmission case 150, and the transmission structure 160 is connected to the first load mechanism 120. By providing the transmission structure 160, the transmission connection of the gearbox 150 and the first load mechanism 120 can be realized. The power of the engine is transmitted to the first load mechanism 120, and the traveling function of the construction machine 200 is realized.

Further, the transmission structure 160 is a transmission shaft or a gear set. By providing the transmission structure 160 as a transmission shaft, the transmission case 150 and the first load mechanism 120 are in transmission connection via the transmission shaft, and the transmission shaft plays a role of transmitting power. By providing the drive structure 160 as a gear set, the gearbox 150 is in driving connection with the first load mechanism 120 via the gear set, which serves to transmit power.

Further, the powertrain 100 also includes a gearbox 170. Specifically, the gear box 170 is connected to the transmission structure 160, and the gear box 170 is connected to the first load mechanism 120. By providing the gear box 170, on the one hand, a driving connection of the first load mechanism 120 with the driving mechanism 160 can be achieved; on the other hand, the transmission ratio and the movement direction can be changed.

Further, as shown in fig. 1, the first load mechanism 120 includes an axle 121 and a wheel body 122. Specifically, the axle 121 is connected with the transmission 150. Wheel 122 is provided on axle 121. The axle 121 is also called an axle, the axle 121 is connected to a vehicle frame (a load-bearing vehicle body) through a suspension, and two ends of the axle are used for mounting a wheel body 122. By providing the axle 121 and the wheel body 122, the traveling function of the construction machine 200 can be realized.

EXAMPLE five

The utility model discloses a drive train 100 that an embodiment provided can be understood as a leading pump truck full-power takeoff drive system of oil pump, mainly includes facial make-up drive system and chassis drive system. The upper-mounted transmission system comprises an engine, a full power take-off clutch (power take-off 118), an elastic coupling 140, a mounting shell 180 and a second load mechanism 130, the second load mechanism 130 is connected with a full power take-off output port through the elastic coupling 140, the second load mechanism 130 is directly connected in series at the rear end of the engine, the front-mounted arrangement of the second load mechanism 130 is achieved, the structure is compact, and a transmission chain is short. The chassis drive system includes an engine, a flywheel 116, a first clutch 112, a gearbox 150, a drive shaft, a gearbox 170 and wheels (i.e. the body 122 of the first load mechanism 120), power being transmitted from the engine to the wheels in stages.

An installation shell 180 is arranged between the full power take-off output port of the upper-installation transmission system and the second load mechanism 130, and the elastic coupling 140 is arranged in the installation shell 180. The mounting case 180 is used to connect the second load mechanism 130 and the engine full power take-off. The power take-off 118 includes a flange 114 for mounting an outer race (i.e., a first portion 141) of the elastic coupling 140, and an inner race (i.e., a second portion 142) of the elastic coupling 140 is connected to an output shaft (i.e., a first shaft 132) of the main oil pump 131 by a spline, so as to connect the second load mechanism 130 to an output port of the engine.

The full power take-off output port of the engine is connected with the crankshaft of the engine through the full power take-off clutch and the front gear train of the engine, so that the full power output of the engine can be realized.

The second load mechanism 130 of the upper transmission system is formed by connecting a main oil pump 131, an arm support pump 133 and a duplicate gear pump 135 in series, the front end of the second load mechanism 130 is directly connected in series at the rear end of the engine, and a support is arranged at the rear end of the second load mechanism 130.

The chassis transmission system is an original vehicle chassis transmission system, and power is transmitted to wheels through the first clutch 112, the gearbox 150, the transmission shaft and the gearbox 170, so that the running function of the engineering machine 200 is realized.

Example six

As shown in fig. 2, an embodiment of the present invention provides a working machine 200 including the power transmission system 100 in any of the embodiments described above. Optionally, the work machine 200 further includes a frame 210, and the power transmission system 100 is connected to the frame 210. Specifically, the engine assembly 110 of the power transmission system 100 is connected to the frame 210, the first load mechanism 120 of the power transmission system 100 is connected to the frame 210, and the second load mechanism 130 of the power transmission system 100 is connected to the frame 210.

It should be noted that the construction machine 200 may be a construction vehicle such as a pump truck, or may be a construction device such as an on-vehicle pump.

According to the embodiment of the power transmission system and the engineering machinery of the utility model, because the second load mechanism is directly connected with the power takeoff, compared with the mode that other transmission structures are arranged between the second load mechanism and the power takeoff, on one hand, the transmission chain can be shortened, and the transmission efficiency is improved; on the other hand, the second load mechanism can be arranged at the rear end of the engine assembly, the position of the second load mechanism is favorable to being arranged in the front, the structure is more compact, and the integration level is higher.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention.

In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A powertrain system, comprising:

an engine assembly (110), comprising:

an engine body (111);

an output shaft (115) connected to the engine body (111);

a flywheel (116) connected to the output shaft (115), the flywheel (116) being adapted to be connected to a first load mechanism (120);

and a power take-off (118) connected to the output shaft (115) between the engine body (111) and the flywheel (116), wherein the power take-off (118) is connected to a second load mechanism (130) through an elastic coupling (140).

2. The drivetrain of claim 1, wherein the engine assembly (110) further comprises:

the transmission gear (117) is used for driving and connecting the power takeoff (118) with the output shaft (115) through the transmission gear (117).

3. The drivetrain according to claim 1, characterized in that the second load mechanism (130) comprises at least two pump bodies.

4. The drivetrain of claim 1, wherein the power take-off (118) includes a flange (114), and the resilient coupling (140) includes:

a first portion (141) connected to the flange (114);

a second part (142) connected to the first part (141), a buffer layer being provided between the first part (141) and the second part (142), the second part (142) being connected to the second load mechanism (130).

5. The powertrain system of any one of claims 1-4, further comprising:

a first clutch (112) connected to the first load mechanism (120), the first clutch (112) being connected to the flywheel (116).

6. The drivetrain of claim 5, further comprising:

a gearbox (150) connected to the first clutch (112), the gearbox (150) being connected to the first load mechanism (120).

7. The drivetrain of claim 6, further comprising:

the transmission structure (160) is connected with the gearbox (150), the transmission structure (160) is connected with the first load mechanism (120), and the transmission structure (160) is a transmission shaft or a gear set.

8. The powertrain system of any of claims 1-4, wherein the first load mechanism (120) includes:

the axle (121) is in transmission connection with the flywheel (116);

and a wheel body (122) connected to the axle (121).

9. The powertrain system of any one of claims 1-4, further comprising:

and the mounting shell (180) is connected with the engine body (111), and the elastic coupling (140) is arranged in the mounting shell (180).

10. A working machine, characterized by comprising a power transmission system according to any one of claims 1-9.

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