CN111252023B - Vehicle rear protection device and assembly method thereof - Google Patents
Vehicle rear protection device and assembly method thereof Download PDFInfo
- Publication number
- CN111252023B CN111252023B CN202010170960.8A CN202010170960A CN111252023B CN 111252023 B CN111252023 B CN 111252023B CN 202010170960 A CN202010170960 A CN 202010170960A CN 111252023 B CN111252023 B CN 111252023B
- Authority
- CN
- China
- Prior art keywords
- swing rod
- cross beam
- vehicle
- guide shaft
- swing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000007704 transition Effects 0.000 claims description 27
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000001012 protector Effects 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/56—Fittings damping bouncing force in truck collisions, e.g. bumpers; Arrangements on high-riding vehicles, e.g. lorries, for preventing vehicles or objects from running thereunder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
- B62D65/02—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
- B62D65/16—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components the sub-units or components being exterior fittings, e.g. bumpers, lights, wipers, exhausts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention relates to the field of vehicle safety structures, in particular to a vehicle rear protection device and an assembly method thereof. When the vehicle is subjected to rear-end collision of other vehicles, collision energy formed by the other vehicles impacts the protection plate, and the two guide shafts can be driven to move along the strip-shaped holes of the cross beam and compress the springs on the cross beam to completely prop against the baffle plate of the positioning seat, so that the first swing rod, the second swing rod and the cross beam form a fixed right-angled triangle structure, the fixed structural strength of the protection plate is enhanced, and an engine cabin of the rear-end collision vehicle can be prevented from being crashed into the bottom of the vehicle. When the obstacle is clamped between the vehicle protection plate and the rear wheel, the inclined guide plate is stressed to be in contact with the obstacle, so that the guide plate and the protection plate can swing upwards, the departure angle of the vehicle is increased, and the obstacle is prevented from clamping the protection plate of the vehicle. Therefore, the rear protection device can protect the rear-end vehicles and can also cope with various road conditions requiring a larger departure angle, so that the trafficability of the vehicles is ensured.
Description
Technical Field
The invention relates to the field of vehicle safety structures, in particular to a vehicle rear protection device and an assembly method thereof.
Background
With the development of transportation and the improvement of the vehicle conservation rate in China, the number of car accidents is increased, a considerable part of car accidents are originated from rear-end collision, and the rear protection plate is generally arranged higher due to the fact that part of vehicles (such as trucks) consider the problem of departure angle, and the engine compartment of a sedan head is lower in posture, so that the engine compartment of the sedan is directly drilled under the protection plate during rear-end collision, a cab is subjected to intrusion of the truck tail, and the safety of members in the cab is directly threatened. In view of this, some trucks developed guard plates with lifting structures, so that the truck can automatically lift the guard plates when descending a slope, so as to ensure the trafficability of the truck. However, when an obstacle (e.g., stone or the like) placed on the roadside is caught between the fender and the rear wheel due to a turning or the like of the vehicle, that is, when the side of the fender is blocked, the fender cannot be lifted, and at this time, the vehicle cannot be moved.
Disclosure of Invention
The invention provides a vehicle rear protection device and an assembly method thereof, which are used for solving the problem that the existing vehicle rear protection device cannot move when an obstacle is clamped between a protection plate and a rear wheel.
The invention adopts the following technical scheme: the utility model provides a protector behind vehicle and assembly method thereof, includes crossbeam and guard plate, the guard plate both sides all are connected with the crossbeam, and the crossbeam is fixed in frame bottom, its characterized in that: the device also comprises a first swing rod, a second swing rod, guide shafts, guide plates, positioning seats and springs, wherein two guide shafts are arranged and are respectively connected with the front end and the rear end of the cross beam relative to the length direction of the vehicle in a sliding manner; the two ends of the guide shaft at the front end of the cross beam are respectively and rotationally connected with the first swing rods, the two sides of the protection plate are respectively and fixedly connected with the two first swing rods, the two ends of the guide shaft at the rear end of the cross beam are respectively and rotationally connected with the second swing rods, the two sides of the guide plate are respectively and fixedly connected with the two first swing rods, and the first swing rods and the second swing rods are rotationally connected at the other ends of the opposite guide shafts; the front end and the rear end of the cross beam are respectively fixed with the positioning seats, and when the protection plate is vertical, a line segment formed by the distance between the two positioning seats at the two ends of the cross beam, a line segment formed by the axes of the first swing rod and the second swing rod which are respectively connected with the guide shaft and the two ends of the second swing rod and a line segment formed by the axes of the guide shaft and the first swing rod form a right triangle structure; the spring is connected between the positioning seat at the front end of the cross beam and the guide shaft connected with the first swing rod, and the spring is fixedly connected between the positioning seat at the rear end of the cross beam and the guide shaft connected with the second swing rod.
As a further improvement, the front end and the rear end of the cross beam relative to the length direction of the vehicle are respectively provided with a strip-shaped hole, the length direction of the strip-shaped holes is consistent with the length direction of the vehicle, and the guide shafts at the front end and the rear end of the cross beam respectively penetrate through the two strip-shaped holes.
As a further improvement, the hole wall above the strip-shaped hole is an inclined surface which is inclined downwards towards the head of the vehicle, the guide shafts penetrate through the strip-shaped hole at the speed of time, and the diameter of the guide shafts is smaller than the maximum width of the strip-shaped hole.
As a further improvement, nuts are arranged on two sides of one end of the first swing rod and the second swing rod, which are connected with the guide shaft, and the nuts are spirally fixed on the guide shaft.
As a further improvement, the positioning seat comprises a seat sleeve and a baffle, a through hole for the cross beam to pass through is formed in the center of the seat sleeve, the baffle is perpendicular to the length direction of the through hole, and the baffle props against the spring.
As a further improvement, the side edge of the seat cover of the positioning seat is provided with first fixing holes penetrating through two sides, the front end and the rear end of the cross beam relative to the length direction of the vehicle are respectively provided with second fixing holes corresponding to the first fixing holes, and line segments formed by the hole distances of the second fixing holes at the front end and the rear end of the cross beam and the axes of the first swing rod, which are respectively connected with the guide shafts and the second swing rod, and line segments formed by the axes of the guide shafts and the first swing rod, which are respectively connected with the two ends of the second swing rod form a right triangle.
As a further improvement, a fixing column is fixed at a position between the two positioning plates above the cross beam, and the fixing column is fixedly connected to the tail part of the frame.
As a further improvement, the device also comprises a transition shaft, the other ends of the first swing rod and the second swing rod opposite to the guide shaft are respectively provided with a connecting hole, the two ends of the transition shaft respectively penetrate through the connecting holes of the first swing rod and the second swing rod at the two ends of the guide shaft, and the transition shaft is in the outer side of the first swing rod and is spirally connected with a nut
The assembly method of the vehicle rear protection device is characterized by comprising the following steps of: the method comprises the following steps:
step one: fixing the fixed column of the cross beam at the bottom of the frame;
step two: sleeving a positioning seat into the beam at the front end of the beam, sleeving a spring into the beam and penetrating a guide shaft into the beam, and penetrating the guide shaft into the beam at the rear end of the beam, sleeving the spring into the beam and sleeving the positioning seat into the beam;
step three: measuring the distance L1 between the two ends of the first swing rod and the axes of the guide shaft and the two swing rods respectively, and measuring the distance L between the two ends of the second swing rod and the axes of the guide shaft and the one swing rod respectively 2 According to the formula L 3 =√（L 2 ²-L 1 (v) to measure L 3 The length is the distance after the positioning seats at the front end and the rear end of the cross beam are fixed, and the length is taken as the distance after the positioning seats at the front end and the rear end of the cross beam are fixed;
step four: two ends of a guide shaft at the front end of the cross beam are connected with one end of a first swing rod, two ends of a guide shaft at the rear end of the cross beam are connected with one end of a second swing rod, and a transition roller is arranged on the other end of the first swing rod and the second swing rod opposite to the guide shaft in a penetrating manner, so that two ends of the transition shaft respectively penetrate through connecting holes of the first swing rod and the second swing rod at the two ends of the guide shaft;
step five: fixing a protection plate at one end of the first swing rod, which is opposite to the second swing rod;
step six: the guide plate is fixed at one end of the second swing rod facing the ground.
As a further improvement of the assembly method of the vehicle rear protection device, the hole distance between the front end and the rear end of the cross beam relative to the vehicle length direction is L 3 After the fixing bolts penetrate through the first fixing holes and the second fixing holes of the positioning seats and are spirally connected with the nuts, the positioning seats can be fixed on the cross beam, and the distance between the two positioning seats of the same cross beam is L 3 Is a length of (c).
As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: when the vehicle is subjected to rear-end collision of other vehicles, collision energy formed by the other vehicles impacts the protection plate, so that the two guide shafts are driven to move along the strip-shaped holes of the cross beam and compress the springs on the cross beam to completely prop against the baffle plate of the positioning seat, the two guide shafts are further fixed, the first swing rod, the second swing rod and the cross beam can form a fixed right-angle triangle structure, the fixed structural strength of the protection plate is enhanced, the collision from the rear-end collision vehicle is resisted, and the engine compartment of the rear-end collision vehicle is prevented from being impacted into the bottom of the vehicle. When obstacles such as stones are clamped between the vehicle protection plate and the rear wheel, the inclined guide plate can be stressed to be in contact with the obstacles, and as the vehicle advances, the guide plate, the second swing rod, the protection plate and the first swing rod can swing upwards due to the blocking of the guide plate by the obstacles, so that the departure angle of the vehicle is increased, and the situation that the obstacle clamps the protection plate of the vehicle is avoided. Therefore, the rear protection device can protect the rear-end vehicles and can also cope with various road conditions requiring a larger departure angle such as obstacle jam and the like, thereby ensuring the trafficability of the vehicles.
Drawings
Fig. 1 is a schematic perspective view of the present invention connected to a vehicle tail.
Fig. 2 is a schematic perspective view of the present invention.
Fig. 3 is a schematic view of the hidden shield and guide plate of fig. 2.
Fig. 4 is an enlarged schematic view of the direction a in fig. 3.
Fig. 5 is an enlarged schematic view of the direction B in fig. 4.
Fig. 6 is a schematic cross-sectional view of the connection of the positioning seat and the cross beam.
Fig. 7 is a schematic side view of a right triangle structure formed by the cross beam, the first swing link and the swing link.
Fig. 8 is a schematic side view of the vehicle after downhill.
Fig. 9 is a schematic view showing the inclination of the guide plate and the shielding plate after being blocked by the obstacle.
Detailed Description
Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, 2 and 4, a vehicle rear guard device comprises a cross beam 4 and a guard plate 2. The number of the cross beams 4 is two, the cross beams are respectively positioned on two sides of the protection plate 2, and the cross beams 4 are used for connecting the frame 1 of the vehicle and the protection plate 2. A fixed column 42 is fixed above the cross beam 4, and the fixed column 42 is fixedly connected to the tail of the frame 1. Specifically, the top of the fixing column 42 can be welded with the flat plate 43, the flat plate 43 is provided with a plurality of through holes for penetrating bolts, the bolts sequentially penetrate through the through holes in the flat plate 43 and the through holes arranged at the bottom of the frame 1 during assembly, and then the bolts and the nuts are connected to be fastened in a screwed manner, so that the cross beam 4 can be fixed; or the fixing column 42 can be directly fixed at the bottom of the frame 1 in a welding manner to fix the cross beam 4, and the fixing structure in this embodiment can be a structure of direct welding or a structure of connecting a bolt with a nut.
As shown in fig. 2 to 4, the invention further comprises a first swing rod 21, a second swing rod 31, a guide shaft 5, a transition roller 8, a guide plate 3, a positioning seat 6 and a spring 7. The guide shafts 5 are arranged at the front end and the rear end between the two cross beams 4 respectively. The front end and the rear end of the cross beam 4 relative to the length direction of the vehicle are respectively provided with a strip-shaped hole 41, and the length direction of the strip-shaped holes 41 is consistent with the length direction of the frame 1. The guide shafts 5 at the front and rear ends of the cross beam 4 respectively pass through the strip-shaped holes 41 corresponding to the same ends of the two cross beams 4, and the two guide shafts 5 are limited by the structure of the strip-shaped holes 41, so that the guide shafts 5 respectively slide on the front and rear ends of the cross beam 4 relative to the length direction of the vehicle. In addition, as shown in fig. 4 and 6, the wall of the hole above the bar-shaped hole 4 is a slope 44 inclined downwards towards the vehicle toward the vehicle head, and the diameter of the guide shaft 5 is smaller than the maximum width of the bar-shaped hole 41 and equal to the minimum width of the bar-shaped hole 41, so that the guide shaft 5 can have a small gap moving up and down, and the slope above the bar-shaped hole 41 can enable the guide shaft 5 to move towards the vehicle head along the slope 44 after being subjected to external force, namely, the direction of vehicle travelling. Specifically, the maximum width of one end of the bar-shaped hole 41 is 40mm, the minimum width of the other end is 30mm, and the diameter of the guide shaft 5 is 30mm, so that the gap between the up-and-down movement of the guide shaft 5 is 0-10 mm.
As shown in fig. 2 and 3, the two ends of the guide shaft 5 at the front end of the cross beam 4 are connected with the first swing rod 21, and the two ends of the guide shaft 5 at the rear end of the cross beam 4 are connected with the second swing rod 31. The first swing rod 21 and the second swing rod 31 are respectively provided with a nut 51 at two sides of one end connected with the guide shaft 5, the nuts 51 are fixed on the guide shaft 5 in a screwed manner, limiting of the first swing rod 21 and the second swing rod 31 is achieved through the nuts 5, the first swing rod 21 and the second swing rod 31 can only swing relative to the guide shaft 5, further, the nuts 51 can be directly welded and fixed on the guide shaft 5 or the nuts 51 are fixed on two sides of the first swing rod 21 and the second swing rod 31 in a oppositely screwed manner through the two nuts 51 as shown in fig. 4. The two sides of the protection plate 2 are respectively and fixedly connected to the two first swing rods 21, and the two sides of the guide plate 3 are respectively and fixedly connected to the two first swing rods 31. The first swing rod 21 and the second swing rod 31 are respectively provided with a connecting hole (not shown) at the other end opposite to the guide shaft 5, the two ends of the transition roller 8 are provided with threaded columns 81, the diameter of each threaded column 81 is smaller than that of the transition roller 8 body, the threaded columns 81 penetrate through the connecting holes and then are spirally connected with nuts 82 at the outer side of the first swing rod 21, and the connecting structure of the nuts 82 is consistent with the connecting mode of the guide shaft 5 and the nuts 51. The first swing rod 21 and the second swing rod 31 are rotatably connected at the other end opposite to the guide shaft 5 by the connection of the transition roller 8 by taking the transition roller 8 as an axis, and the transition roller 8 can rotate relative to the first swing rod 21 and the second swing rod 32.
As shown in fig. 4 and 6, the positioning seat 6 is fixed at the front and rear ends of the beam 4, the positioning seat 6 includes a seat cover 62 and a baffle 61, a through hole (not shown) for the beam 4 to pass through is formed in the center of the seat cover 62, the baffle 61 is fixed at one end of the seat cover 62, and the baffle 61 is perpendicular to the length direction of the through hole of the seat cover 62. The spring 7 is also connected between the positioning seat 6 at the front end of the cross beam 4 and the guide shaft 5 connected with the first swing rod 21, and likewise, the spring 7 is also fixedly connected between the positioning seat 6 at the rear end of the cross beam 4 and the guide shaft 5 connected with the second swing rod 31, and two ends of the spring 7 are respectively and fixedly connected to the baffle 61 and the guide shaft 5 of the positioning seat 6. The seat cover 62 side of positioning seat 6 is equipped with the first fixed orifices 64 that runs through both sides, the fixed bolt 63 is worn to be equipped with in the locating hole, the crossbeam 4 is relative vehicle length direction's front and back both ends all be equipped with the second fixed orifices 45 that correspond with first fixed orifices 64, during the assembly, pass first fixed orifices 64 and second fixed orifices 45 back screw connection nut 46 with fixed bolt 63 can make positioning seat 6 be fixed in crossbeam 4. In addition, the fixing posts 42 above the cross beam 4 are disposed between the fixing positions of the two positioning seats 6, which is convenient for the sleeve 62 of the positioning seat 6 to be threaded from the two ends of the cross beam 4.
Further, the distance between the positioning seats 6 at the front and rear ends of the cross beam 4 and the line segment formed by the axes of the first swing rod 21 and the guide shaft 5 respectively connected with the axes of the second swing rod 31 and the line segment formed by the axes of the second swing rod 31 respectively connected with the guide shaft 5 and the first swing rod 21 form a right triangle, wherein the axes are axes of the transition roller 8. Specifically, as shown in fig. 7, the distance denoted by L3 corresponds to the distance between the positioning seats 6 at the front and rear ends of the cross beam 4, the distance denoted by L1 corresponds to the length of a line segment formed by connecting the two ends of the first swing link 21 with the axes of the guide shaft 5 and the second swing link 31, respectively, and the distance denoted by L2 corresponds to the length of a line segment formed by connecting the two ends of the second swing link 31 with the axes of the guide shaft 5 and the first swing link 21, respectively, when L 1 、L 2 And L 3 Forming right triangle, i.e. geometry when the guard 2 plate is verticalPythagorean theorem knows that L 1 2 +L 3 2 =L 2 2 The transformation formula is L 3 =√（L 2 ²-L 1 To) thereby determine L 2 And L 1 Under the condition of (2), the fixed distance between the positioning seats 6 at the front end and the rear end of the cross beam 4 can be calculated. The purpose of this distance is to allow the collision energy of the other vehicle to strike the fender 2 when the vehicle is involved in a rear-end collision with the other vehicle, which will cause the fender 2 to move forward, thereby driving the two guide shafts 5 to move and compress the springs 7 to the stop plate 61 fully against the positioning seat 6, thereby securing the two guide shafts 5, i.e., L 3 The first swing link 21, the second swing link 31 and the cross beam 4 can be formed into a fixed right triangle by fixing, so that the fixed structural strength of the protection plate 2 is enhanced, the impact from the rear-end vehicle is resisted, and the engine compartment of the rear-end vehicle is prevented from being crashed into the bottom of the vehicle. In addition, in the process of impacting the guide shaft 5 to compress the spring 7 by the collision energy, the compression of the spring 7 can also play a role of buffering to absorb the collision energy, so that the damage of the vehicle is reduced.
Specifically, the assembly method of the vehicle rear protection device comprises the following steps:
step one: fixing the fixing column of the cross beam 4 to the bottom of the frame 1 of the vehicle, wherein the fixing of the cross beam 4 and the frame 1 is preferably a welded connection structure because the subsequent cross beam 4 generally has no need of disassembly and the connection stability is ensured;
step two: the front end of the beam 4 is sleeved with the positioning seat 6 in the beam 4, the spring 7 is sleeved with the beam 4 and the guide shaft 5 is penetrated into the strip-shaped hole 41 of the beam 4, the rear end of the beam 4 is sleeved with the guide shaft 5 in the strip-shaped hole 41 of the beam 4, the spring 7 is sleeved with the beam 4 and the positioning seat 6 is sleeved with the beam 4, wherein the guide shaft 5 simultaneously penetrates through the strip-shaped holes 41 corresponding to the two beams 4 at the same end;
step three: the distance L1 between the two ends of the first swing rod 21 and the axes of the guide shaft 5 and the two swing rods 31 is measured, and the distance L between the two ends of the second swing rod 31 and the axes of the guide shaft 5 and the one swing rod 21 is measured 2 According to the formula L 3 =√（L 2 ²-L 1 (v) to measure L 3 Length of (2)Degree, L 3 The length of the beam 4 is the distance after the positioning seats 6 at the front and rear ends of the beam 4 are fixed, and the distance after the positioning seats 6 at the front and rear ends of the beam 4 are fixed is the distance between the beam 4 and the second fixing holes 45 at the front and rear ends of the vehicle in the length direction, after the fixing bolts 43 pass through the first fixing holes and the second fixing holes 45 and the screw connection nuts 46, the positioning seats 6 can be fixed on the beam 4, and the distance between the two positioning seats 6 of the same beam 4 is L 3 Is a length of (2);
step four: the two ends of the guide shaft 5 at the front end of the cross beam 4 are connected with one end of a first swing rod 21, the two ends of the guide shaft 5 at the rear end of the cross beam 4 are connected with one end of a second swing rod 31, and a transition roller 8 is arranged on the other end of the first swing rod 21 and the second swing rod 31 opposite to the guide shaft 5 in a penetrating manner, so that the two ends of the transition shaft 8 respectively penetrate through connecting holes of the first swing rod 21 and the second swing rod 31 at the two ends of the guide shaft 5, specifically, the first swing rod 21 and the second swing rod 31 can be firstly connected with the same end of the two guide shafts 5, one end of the transition roller 5 is connected with the other end of the two guide shafts 5, and the other first swing rod 21 and the other second swing rod 31 are connected with the other end of the transition roller 5;
step five: the protection plate 2 is fixed at one end of the first swing rod 21, which is opposite to the second swing rod 31;
step six: the guide plate 3 is fixed at one end of the second swing rod 31 facing the ground, so that assembly can be completed, parts such as the spring 7, the positioning seat 6 or the guide shaft 5 and the like can be replaced conveniently, the guide plate 3 and the second swing rod 31 are fixedly connected, and the fixed connection of the protection plate 2 and the first swing rod 21 in the fifth step is preferably a structure which is connected with a nut after a bolt is worn, and the structure can facilitate the guide shaft 5 to be taken out of the cross beam 4, so that replacement or maintenance of each part is facilitated.
As shown in fig. 8 and 9, when the vehicle is caught in an obstacle 9 such as a stone between the guard plate 2 and the rear wheel due to a turning or the like, the inclined guide plate 3 is forced to contact with the obstacle 9, and as the vehicle advances, the guide plate 3 and the second swing link 31 and the guard plate 2 and the first swing link 21 are both swung upward and toward the rear due to the blocking of the guide plate 3 by the obstacle 9, and at the same time, the guide shaft 5 connected to the first swing link 21 is moved toward the head while the compression spring 7 and the guide shaft 5 connected to the second swing link 31 is moved toward the tail while the spring 7 is stretched, and finally the transition roller 8 is moved upward, that is, equivalent to increasing the departure angle of the vehicle, so as to avoid the catching of the obstacle. When the vehicle is in an environment requiring a larger departure angle, such as a downhill slope, the transition roller 8 is stressed to contact with the slope 10 along with the movement of the vehicle, at the moment, the slope 10 is equivalent to the guiding effect of the transition roller 8 to the tail and moving upwards in an inclined manner, the transition shaft 8 connected with the first swing rod 21 moves to the tail and upwards in an inclined manner under the guiding effect of the inclined plane 44 above the strip-shaped hole 41, and the first swing rod 21 can swing towards the tail and upwards as the transition roller 8 by the movement of the transition roller 8 and the guiding shaft 5, so that the protection plate 2 is driven to swing upwards, and the departure angle of the vehicle is increased. Therefore, the rear protection device can protect the rear-end vehicles and also can cope with various road conditions requiring a large departure angle, such as the blocking of the obstacle 9, the slope 10 and the like, so that the trafficability of the vehicles is ensured.
The foregoing is merely illustrative of specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the design concept shall fall within the scope of the present invention.
Claims (8)
1. The utility model provides a protector behind vehicle, including crossbeam and guard plate, the guard plate both sides all are connected with the crossbeam, and the crossbeam is fixed in frame bottom, its characterized in that: the device comprises a cross beam, a first swing rod, a second swing rod, guide shafts, guide plates, positioning seats and springs, wherein the number of the guide shafts is two, the front end and the rear end of the cross beam relative to the length direction of the vehicle are respectively provided with a strip-shaped hole, the length direction of each strip-shaped hole is consistent with the length direction of the vehicle, and the guide shafts at the front end and the rear end of the cross beam respectively penetrate through the two strip-shaped holes, so that the two guide shafts are respectively connected with the front end and the rear end of the cross beam relative to the length direction of the vehicle in a sliding manner; the hole wall above the strip-shaped hole is an inclined surface which faces the headstock and inclines downwards, the strip-shaped holes are all penetrated by the guide shafts, and the diameter of the guide shafts is smaller than the maximum width of the strip-shaped holes; the two ends of the guide shaft at the front end of the cross beam are respectively and rotationally connected with the first swing rods, the two sides of the protection plate are respectively and fixedly connected with the two first swing rods, the two ends of the guide shaft at the rear end of the cross beam are respectively and rotationally connected with the second swing rods, the two sides of the guide plate are respectively and fixedly connected with the two first swing rods, and the first swing rods and the second swing rods are rotationally connected at the other ends of the opposite guide shafts; the front end and the rear end of the cross beam are respectively fixed with the positioning seats, and when the protection plate is vertical, a line segment formed by the distance between the two positioning seats at the two ends of the cross beam, a line segment formed by the axes of the first swing rod and the second swing rod which are respectively connected with the guide shaft and the two ends of the second swing rod form a right triangle structure; the spring is connected between the positioning seat at the front end of the cross beam and the guide shaft connected with the first swing rod, and the spring is fixedly connected between the positioning seat at the rear end of the cross beam and the guide shaft connected with the second swing rod.
2. A vehicle rear guard as claimed in claim 1, wherein: nuts are arranged on two sides of one end, connected with the guide shaft, of the first swing rod and the second swing rod, and the nuts are spirally fixed on the guide shaft.
3. A vehicle rear guard as claimed in claim 1, wherein: the positioning seat comprises a seat sleeve and a baffle, a through hole for the cross beam to pass through is formed in the center of the seat sleeve, the baffle is perpendicular to the length direction of the through hole, and the baffle props against the spring.
4. A vehicle rear guard as claimed in claim 3, wherein: the seat cover side of positioning seat is equipped with the first fixed orifices that runs through both sides, the front and back both ends of crossbeam relative vehicle length direction all be equipped with the second fixed orifices that corresponds of first fixed orifices, and the pitch of hole of second fixed orifices and first pendulum rod both ends are connected the line segment that the axle center of guiding axle and second pendulum rod formed respectively and the line segment that the axle center of second pendulum rod both ends are connected guiding axle and first pendulum rod formed respectively constitute right triangle.
5. A vehicle rear guard as claimed in claim 1, wherein: the position between two positioning seats above the cross beam is fixedly provided with a fixed column, and the fixed column is fixedly connected to the tail part of the frame.
6. A vehicle rear guard as claimed in claim 1, wherein: the novel swing arm structure is characterized by further comprising a transition shaft, connecting holes are formed in the other ends of the first swing rod and the second swing rod, which are opposite to the guide shaft, the two ends of the transition shaft respectively penetrate through the connecting holes of the first swing rod and the second swing rod at the two ends of the guide shaft, and the transition shaft is in the outer side of the first swing rod and is in threaded connection with a nut.
7. A method of assembling a rear fender of a vehicle as claimed in any one of claims 1 to 6, wherein: the method comprises the following steps:
step one: fixing the fixed column of the cross beam at the bottom of the frame;
step two: sleeving a positioning seat into the beam at the front end of the beam, sleeving a spring into the beam and penetrating a guide shaft into the beam, and penetrating the guide shaft into the beam at the rear end of the beam, sleeving the spring into the beam and sleeving the positioning seat into the beam;
step three: measuring the distance L1 between the two ends of the first swing rod and the axes of the guide shaft and the two swing rods respectively, and measuring the distance L between the two ends of the second swing rod and the axes of the guide shaft and the one swing rod respectively 2 According to the formula L 3 =√（L 2 ²-L 1 (v) to measure L 3 The length is the distance after the positioning seats at the front end and the rear end of the cross beam are fixed, and the length is taken as the distance after the positioning seats at the front end and the rear end of the cross beam are fixed;
step four: two ends of a guide shaft at the front end of the cross beam are connected with one end of a first swing rod, two ends of a guide shaft at the rear end of the cross beam are connected with one end of a second swing rod, and a transition roller is arranged on the other end of the first swing rod and the second swing rod opposite to the guide shaft in a penetrating manner, so that two ends of the transition shaft respectively penetrate through connecting holes of the first swing rod and the second swing rod at the two ends of the guide shaft;
step five: fixing a protection plate at one end of the first swing rod, which is opposite to the second swing rod;
step six: the guide plate is fixed at one end of the second swing rod facing the ground.
8. The method of assembly of claim 7, wherein: the distance between the beam and the second fixing holes arranged at the front end and the rear end of the longitudinal direction of the vehicle is L 3 After the fixing bolts penetrate through the first fixing holes and the second fixing holes of the positioning seats and are spirally connected with the nuts, the positioning seats can be fixed on the cross beam, and the distance between the two positioning seats of the same cross beam is L 3 Is a length of (c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170960.8A CN111252023B (en) | 2020-03-12 | 2020-03-12 | Vehicle rear protection device and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170960.8A CN111252023B (en) | 2020-03-12 | 2020-03-12 | Vehicle rear protection device and assembly method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111252023A CN111252023A (en) | 2020-06-09 |
| CN111252023B true CN111252023B (en) | 2023-06-06 |
Family
ID=70945831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010170960.8A Active CN111252023B (en) | 2020-03-12 | 2020-03-12 | Vehicle rear protection device and assembly method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111252023B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476735A (en) * | 2016-11-23 | 2017-03-08 | 安徽江淮汽车集团股份有限公司 | Vehicle rear protecting |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6092959A (en) * | 1998-11-16 | 2000-07-25 | Energy Absorption Systems, Inc. | Method for decelerating a vehicle, highway crash cushion, and energy absorbing element therefor |
| US7377522B2 (en) * | 2002-09-18 | 2008-05-27 | Macisaac William L | Vehicle with movable and inwardly tilting safety body |
| CN202368516U (en) * | 2011-11-29 | 2012-08-08 | 北汽福田汽车股份有限公司 | Anti-collision device and automobile frame |
| CN205168412U (en) * | 2015-12-11 | 2016-04-20 | 徐燕 | Be used for large -scale freight train crashproof device |
| CN106347272B (en) * | 2016-11-23 | 2018-12-14 | 安徽江淮汽车集团股份有限公司 | Vehicle rear protecting |
| CN109229043B (en) * | 2018-09-11 | 2021-07-30 | 重庆工业职业技术学院 | A new type of automobile anti-collision beam |
-
2020
- 2020-03-12 CN CN202010170960.8A patent/CN111252023B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106476735A (en) * | 2016-11-23 | 2017-03-08 | 安徽江淮汽车集团股份有限公司 | Vehicle rear protecting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111252023A (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1838567B1 (en) | Trailer mounted attenuator with breakaway axle assembly | |
| CN204644918U (en) | Safety height limiter | |
| CN106644523A (en) | Collision energy absorption device for automobile side surface cylindrical collision test and collision test device | |
| CN105584440A (en) | Collision buffer energy-absorption device for automobile | |
| CN216524813U (en) | Automobile column collision testing device | |
| CN106740602B (en) | Vehicle rear protecting | |
| CN106476735B (en) | Vehicle rear protecting | |
| JP2017521299A (en) | Vehicle collision structure | |
| CN111252023B (en) | Vehicle rear protection device and assembly method thereof | |
| CN207670354U (en) | Bumper beam assembly of vehicle | |
| US7246833B2 (en) | Energy absorbing system for attaching a trailing device to a vehicle | |
| CN210793053U (en) | Engine protection device | |
| CN206609621U (en) | Collision energy absorption device for automobile side surface cylindrical collision test and collision test device | |
| US2541364A (en) | Vehicle bumper | |
| CN204750065U (en) | Safety precautions thick stick | |
| CN107839641B (en) | Special rear anti-collision beam for truck | |
| CN206450424U (en) | Guide column structure of moving platform car for car side cylinder collision test | |
| CN215154435U (en) | Anti-collision device for vehicle | |
| CN216074898U (en) | Buffering guardrail for highway | |
| Riley et al. | Protecting car occupants, pedestrians, and cyclists in accidents involving heavy goods vehicles by using front underrun bumpers and sideguards | |
| CN210618072U (en) | Automobile side surface protection device using cylindrical roller or spherical roller | |
| CN102152770B (en) | Rear-end collision preventing device arranged at rear lower part of large and medium-sized heavy truck | |
| CN202038262U (en) | Rear-end prevention device at lower rear portion of large or medium size truck | |
| CN221079491U (en) | VR safety belt collision experience device | |
| CN213167956U (en) | Automobile contraction bumper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |