CN112278076A - Integrated rear cross beam assembly - Google Patents
Integrated rear cross beam assembly Download PDFInfo
- Publication number
- CN112278076A CN112278076A CN202011192313.3A CN202011192313A CN112278076A CN 112278076 A CN112278076 A CN 112278076A CN 202011192313 A CN202011192313 A CN 202011192313A CN 112278076 A CN112278076 A CN 112278076A
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- cross beam
- rear cross
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- protection
- beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention belongs to the technical field of chassis of commercial vehicles, and discloses an integrated rear cross beam assembly which is of an integrated structure and comprises double rear cross beams, wherein each double rear cross beam comprises a first rear cross beam and a second rear cross beam, the first rear cross beam and the second rear cross beam are parallel to each other and are arranged at intervals, the first rear cross beam is positioned at the rear end relative to the second rear cross beam, and the end parts of the first rear cross beam and the second rear cross beam are detachably connected with a frame longitudinal beam through cross beam connecting parts; the rear lower part protection device is arranged on the first rear cross beam and is positioned at the rear lower part of the first rear cross beam; the rear traction device is arranged on the first rear cross beam and is positioned right behind the first rear cross beam. The rear lower part protection and traction functions are integrated on the rear cross beam, so that the integration degree is high; the integral structure is adopted for molding, so that the parts and connecting pieces of the whole automobile are reduced, and the total weight of the rear cross beam assembly is reduced; the rear lower part protection device and the rear traction device are respectively arranged at the rear lower part and the right rear part of the first rear cross beam, and the position layout of the rear lower part protection device and the rear traction device is optimized and reasonable.
Description
Technical Field
The invention relates to the technical field of chassis of commercial vehicles, in particular to an integrated rear cross beam assembly.
Background
Along with the development of the whole vehicle technology of the commercial vehicle, the whole vehicle chassis is light in weight, and the integration requirement is higher and higher. The rear cross beam assembly is used as an important component of the rear part of the chassis of the commercial vehicle, has important functions of bearing and connecting other parts and the like, and has a great improvement space. In addition, if engineering vehicles such as a dump truck and the like have a discharging and lifting working condition, users often turn over the truck during lifting and discharging when discharging under an extreme road surface, so that the rear end of the chassis of the commercial vehicle is required to have high enough torsional rigidity, the stability of loading a truck box during discharging is improved, and the occurrence of a rollover accident is reduced.
The existing commercial vehicle chassis rear cross beam assembly mostly adopts a sheet metal stamped channel beam, has a single structural function, has low unit torsional rigidity, and has less contribution value to the rear torsional rigidity of the whole vehicle, so that a rear cross beam assembly which can improve the torsional rigidity and can integrate multiple functions is needed.
Disclosure of Invention
The invention aims to provide an integrated rear cross beam assembly to solve the problem of single function of the rear cross beam assembly.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an integrate rear frame member assembly, integrate rear frame member assembly and become a body structure, include:
the double rear cross beams comprise a first rear cross beam and a second rear cross beam, the first rear cross beam and the second rear cross beam are parallel to each other and arranged at intervals, the first rear cross beam is positioned at the rear end relative to the second rear cross beam, and the end parts of the first rear cross beam and the second rear cross beam are detachably connected with the frame longitudinal beam through cross beam connecting parts;
the rear lower part protection device is arranged on the first rear cross beam and is positioned at the rear lower part of the first rear cross beam;
and the rear traction device is arranged on the first rear cross beam and is positioned right behind the first rear cross beam.
Optionally, the first rear cross beam and the second rear cross beam are both closed square beams.
Optionally, the beam connecting portion is provided with a plurality of connecting holes, and the plurality of connecting holes are matched with bolts to be connected to the frame rails.
Optionally, the beam connecting portion is provided with a plurality of first reinforcing ribs, and the plurality of first reinforcing ribs are connected between the plurality of connecting holes.
Optionally, the double rear cross beams further comprise a plurality of transverse stabilizing tubular beams, each transverse stabilizing tubular beam is connected with the first reinforcing rib at one end, and the first rear cross beam or the second rear cross beam is connected at the other end.
Optionally, the number of the transversely-stabilized tubular beams is four, and the beam connecting portions, the first rear beam and the second rear beam are distributed in a rhombic shape in the enclosed space.
Optionally, back lower part protector includes protection crossbeam, protective bracket and second strengthening rib, the protection crossbeam is on a parallel with first back crossbeam sets up, the protection crossbeam orientation one side of first back crossbeam is equipped with fore-and-aft second strengthening rib, protective bracket's one end is connected the second strengthening rib, the other end connect in first back crossbeam.
Optionally, the protective cross beam is in a hollow tubular shape, and a honeycomb type third reinforcing rib is arranged inside the protective cross beam.
Optionally, the rear traction device includes two pin openings and a fitting surface, the fitting surface is attached to the front and rear surfaces of the first rear cross beam, and the two pin openings are disposed at the upper and lower ends of the fitting surface at intervals.
Optionally, the integrated rear cross beam assembly is an all aluminum cast structure.
The invention has the beneficial effects that:
the integrated rear cross beam assembly comprises the double rear cross beams, the rear lower part protection device and the rear traction device, and the rear lower part protection and traction functions are integrated into the rear cross beam, so that the integration degree is high; the integral structure is adopted for molding, so that the parts and connecting pieces of the whole automobile are reduced, and the total weight of the rear cross beam assembly is reduced; the rear lower part protection device and the rear traction device are respectively arranged at the rear lower part and the right rear part of the first rear cross beam, and the position layout of the rear lower part protection device and the rear traction device is optimized and reasonable.
Drawings
FIG. 1 is a schematic side view of an integrated rear cross member assembly according to an embodiment of the present invention;
FIG. 2 is a schematic top view of an integrated rear cross member assembly according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a dual rear cross beam of an integrated rear cross beam assembly according to an embodiment of the present invention;
FIG. 4 is a schematic view of a portion of a rear lower guard of an integrated rear cross beam assembly according to an embodiment of the present invention;
FIG. 5 is a cross-sectional structural schematic view of a guard beam in an integrated rear beam assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of a portion of a rear traction device in an integrated rear cross member assembly according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a rear cross member assembly using a channel beam in the related art.
In the figure:
1. double rear cross beams; 11. a first rear cross member; 12. a second rear cross member; 13. a beam connection portion; 131. connecting holes; 132. a first reinforcing rib; 14. transversely stabilizing the tubular beam; 2. a rear lower guard; 21. a protective beam; 211. a third reinforcing rib; 212. honeycomb holes; 22. a protective bracket; 23. a second reinforcing rib; 3. a rear traction device; 31. a bolt port; 32. a mating surface.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The invention provides an integrated rear cross beam assembly, as shown in fig. 1-2, the integrated rear cross beam assembly in the embodiment is an integrated structure, and specifically comprises a double rear cross beam 1, a rear lower protection device 2 and a rear traction device 3, wherein the double rear cross beam 1 comprises a first rear cross beam 11 and a second rear cross beam 12, the first rear cross beam 11 and the second rear cross beam 12 are parallel to each other and arranged at intervals, the first rear cross beam 11 is positioned at the rear end relative to the second rear cross beam 12, and the end parts of the first rear cross beam 11 and the second rear cross beam 12 are detachably connected with a frame longitudinal beam through a cross beam connecting part 13; the rear lower protection device 2 is arranged on the first rear cross beam 11 and is positioned at the rear lower part of the first rear cross beam 11; the rear traction device 3 is arranged on the first rear cross beam 11 and is positioned right behind the first rear cross beam 11.
The integrated rear cross beam assembly disclosed by the invention comprises a double rear cross beam 1, a rear lower part protection device 2 and a rear traction device 3, wherein the rear lower part protection and traction functions are integrated on the rear cross beam to form the integrated rear cross beam assembly, and the integration degree is high; the double rear cross beams 1, the rear lower protection device 2 and the rear traction device 3 are integrally formed, so that the parts and connecting pieces of the whole vehicle are reduced, and the total weight of the rear cross beam assembly is reduced; the rear lower protection device 2 and the rear traction device 3 are respectively arranged at the rear lower part and the right rear part of the first rear cross beam 11, and the position layout of the rear lower protection device and the right rear part is optimized and reasonable; by adopting the design of the double rear cross beams 1, the stress is more reasonable, and the torsional rigidity of the rear part of the frame is improved in a large proportion compared with a channel steel beam commonly adopted in the prior art.
Optionally, the first rear cross beam 11 and the second rear cross beam 12 are both closed square beams. As shown in fig. 3, the first rear cross beam 11 and the second rear cross beam 12 are main beams of the double rear cross beams 1, the closed square beam can improve the overall bending rigidity of the double rear cross beams 1, and in the embodiment, the closed square double tail beam with the wall thickness of 10cm is adopted, so that the implementation result shows that the torsion and bending rigidity of the rear cross beam assembly can be greatly improved.
Alternatively, the cross member attachment portion 13 is provided with a plurality of attachment holes 131, and the plurality of attachment holes 131 are engaged with bolts to be attached to the frame rails.
As shown in fig. 3, two beam connecting portions 13 are provided at both ends of the first rear beam 11 and the second rear beam 12, and connect the ends of the first rear beam 11 and the second rear beam 12 to form a rectangular frame double rear beam 1 main body. The connecting hole 131 is a cylindrical connecting hole 131 formed in a manner that the long axis direction is parallel to the long axis direction of the first rear cross beam 11 and the second rear cross beam 12, so that the connecting hole is convenient for being connected with a frame rail. Preferably, each beam connecting portion 13 is provided with a plurality of connecting holes 131, the layout and the positions of the connecting holes 13 are optimally designed according to the positions and the stress conditions of the first rear beam 11 and the second rear beam 12, in this embodiment, each beam connecting portion 13 is provided with 14 connecting holes 131, and 28 connecting holes 131 are provided in total, the positions of the connecting holes 131 are comprehensively optimally designed according to the actual stress position and the strength requirement, and stable connection and fixation can be formed between the double rear beams 1 and the frame longitudinal beam.
Alternatively, the beam connecting portion 13 is provided with a plurality of first reinforcing beads 132, and the first reinforcing beads 132 are provided in plurality, and the plurality of first reinforcing beads 132 are connected between the plurality of connecting holes 131.
As shown in fig. 3, each connecting hole 131 is an independent cylindrical threaded hole, the first reinforcing rib 132 is connected between two connecting holes 131, the connecting holes 131 are distributed between the upper and lower rows of connecting holes 131 in a crossed manner to reinforce the connecting holes 131, and meanwhile, both ends of the first rear cross beam 11 and the second rear cross beam 12 are connected to the first reinforcing rib 132, so that the overall stability and strength of the double rear cross beam 1 are improved.
Optionally, the double rear cross beam 1 further includes a plurality of laterally stable tubular beams 14, the plurality of laterally stable tubular beams 14 are connected to one end of each of the laterally stable tubular beams 14, and the other end of each of the laterally stable tubular beams 14 is connected to the first rear cross beam 11 or the second rear cross beam 12.
As shown in fig. 1 to 3, since the first rear cross member 11 and the second rear cross member 12 are parallel to each other and the two cross member connecting portions 13 are also parallel to each other, a support stabilizing mechanism needs to be provided between the two cross member connecting portions 13, the first rear cross member 11 and the second rear cross member 12 to improve the stability of the double rear cross member 1 and prevent deformation. In this embodiment, at least one transversely-stabilized tubular beam 14 is arranged between any adjacent beam connecting portion 13 and the first rear beam 11 or the second rear beam 12, and a triangular stabilizing support is formed between the transversely-stabilized tubular beam 14 and the beam connecting portion 13 connected to both ends and the first rear beam 11 (or the second rear beam 12), so that the strength and stability of the double rear beams 1 are improved.
In some embodiments, as shown in fig. 2, four laterally stable tubular beams 14 are provided, and are distributed in a diamond shape in the enclosed space of the beam connecting portion 13, the first rear beam 11 and the second rear beam 12. The transverse stabilizing tubular beams 14 are of hollow circular tube structures with circular cross sections, the end parts of the two transverse stabilizing tubular beams 14 on the beam connecting part 13 are intersected, and the end parts of the other two transverse stabilizing tubular beams 14 on the first rear cross beam 11 and the second rear cross beam 12 are respectively connected, so that the connecting contact area of the other two transverse stabilizing tubular beams with the first rear cross beam 11 and the second rear cross beam 12 is increased. A plurality of laterally stabilized tubular beams 14 are arranged in the same plane and parallel to the plane of the first rear cross member 11 and the second rear cross member 12 in order to improve the overall stability and torsional rigidity of the double rear cross member 1.
Optionally, the rear lower protection device 2 includes a protection cross beam 21, a protection bracket 22 and a second reinforcing rib 23, the protection cross beam 21 is disposed parallel to the first rear cross beam 11, one side of the protection cross beam 21 facing the first rear cross beam 11 is provided with a longitudinal second reinforcing rib 23, one end of the protection bracket 22 is connected to the second reinforcing rib 23, and the other end is connected to the first rear cross beam 11.
As shown in fig. 4, the protection bracket 22 includes two vertical surface structures that are parallel to each other and are arranged at an interval, and a topology optimization lightweight design is adopted, a first lightening hole is arranged on the vertical surface, the connecting position of the two protection brackets 22 on the protection cross beam 21 can trisect the protection cross beam 21, and the shape and position of the protection bracket 22 are optimized in advance, wherein the vertical surface width of the part of the protection bracket 22 connected with the first rear cross beam 11 is greater than the vertical surface width of the part of the protection bracket 22 connected with the protection cross beam 21, that is, the protection bracket 22 adopts a variable cross-section structure. In the embodiment shown in fig. 4, the second reinforcing rib 23 is disposed on the side of the protective cross member 21 facing the first rear cross member 11, and the protective bracket 22 can be connected to the second reinforcing rib 23 to realize connection and fixation of the protective cross member 21, so as to increase the rigidity of the protective cross member 21. The second reinforcing ribs 13 are provided with second lightening holes so as to lighten the overall weight. The whole rear lower guard 2 meets the requirements of the rear lower guard regulation GB 11567 and 2017.
Preferably, the protective beam 21 is hollow tubular, and the protective beam 21 is provided with a honeycomb third reinforcing rib 211 inside.
As shown in fig. 5, the cross section of the protective beam 21 is in the shape of a hollow ring with an irregular outer shape, honeycomb holes 212 are formed in the ring surface, the honeycomb holes 212 penetrate through the long axis direction of the protective beam 21, the honeycomb holes 212 can reduce the weight of the protective beam 21, and third reinforcing ribs 211 are formed between the honeycomb holes 212, so that the strength and the bending rigidity of the protective beam 21 can be increased.
Optionally, the rear traction device 3 includes two latch openings 31 and a mating surface 32, the mating surface 32 is disposed to be attached to the front rear surface of the first rear cross member 11, and the two latch openings 31 are disposed at the upper and lower ends of the mating surface 32 at intervals. In the embodiment shown in fig. 3 and 6, the diameter of the latch opening 31 is 31mm, and the latch opening is matched with the towing pin to prevent the towing rope or the towing bar, wherein the matching surface 32 is used for making room for the towing rope or the towing bar, and can meet the use requirement of the towing rope or the towing bar with the maximum diameter of 40mm, and the maximum towing force of the rear towing device 3 can reach 20 tons, so as to meet the use requirement of a user. Further, a third lightening hole is formed in the plane where the plug pin opening 31 is formed, so that the total weight is reduced as much as possible on the premise that the strength and the rigidity are met.
The integrated rear cross beam assembly provided by the invention is of an all-aluminum casting structure. This whole aluminium casting structure of integral type integrates rear beam assembly, whole gross weight 83.2Kg, and the degree of integrating is high, and 19 parts and 76 group's connecting pieces in the crossbeam assembly structure of will having now are integrated into a part, wholly reduce 54Kg, reduce and heavily reach 39.3%, and the torsional rigidity and the stability of two rear beam 1 promote obviously simultaneously.
FIG. 7 shows a rear cross member assembly using a channel beam in the prior art, which has a torsional rigidity of 4.21X 106(N x m/radian), the integrated rear crossbeam assembly integrates rear protection and rear traction, the rear crossbeam structure adopts a double-beam structure, two main beams adopt closed square beams, a transverse stable tubular beam 14 is additionally arranged in the middle of the rear crossbeam structure, the torsional rigidity and the stability of the rear crossbeam are improved to the maximum extent, and the torsional rigidity is 1.13 multiplied by 107(N x m/radian), torsional rigidity is improved by 160% compared with the rear beam assembly of the channel beamThe above.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an integrate rear frame member assembly, its characterized in that, it becomes a body structure to integrate rear frame member assembly, includes:
the double rear cross beams comprise a first rear cross beam and a second rear cross beam, the first rear cross beam and the second rear cross beam are parallel to each other and arranged at intervals, the first rear cross beam is positioned at the rear end relative to the second rear cross beam, and the end parts of the first rear cross beam and the second rear cross beam are detachably connected with the frame longitudinal beam through cross beam connecting parts;
the rear lower part protection device is arranged on the first rear cross beam and is positioned at the rear lower part of the first rear cross beam;
and the rear traction device is arranged on the first rear cross beam and is positioned right behind the first rear cross beam.
2. The integrated rear cross beam assembly of claim 1, wherein the first rear cross beam and the second rear cross beam are both closed square beams.
3. The integrated rear cross member assembly according to claim 1, wherein the cross member connecting portion is provided with a plurality of connecting holes which are engaged with bolts to be connected to the frame rails.
4. The integrated rear cross beam assembly according to claim 3, wherein the cross beam connecting portion is provided with a plurality of first reinforcing ribs connected between the plurality of connecting holes.
5. The integrated rear cross beam assembly according to claim 4, wherein the double rear cross beams further comprise a plurality of laterally stable tubular beams, one end of each laterally stable tubular beam is connected with the first reinforcing rib, and the other end of each laterally stable tubular beam is connected with the first rear cross beam or the second rear cross beam.
6. The integrated rear cross beam assembly according to claim 5, wherein four transversely stable tubular beams are arranged, and the beam connecting portions, the first rear cross beam and the second rear cross beam are distributed in a rhombic shape in the enclosed space.
7. The integrated rear cross beam assembly according to claim 1, wherein the rear lower protection device comprises a protection cross beam, a protection support and second reinforcing ribs, the protection cross beam is parallel to the first rear cross beam, one side of the protection cross beam, facing the first rear cross beam, is provided with the longitudinal second reinforcing ribs, one end of the protection support is connected with the second reinforcing ribs, and the other end of the protection support is connected with the first rear cross beam.
8. The integrated rear cross beam assembly according to claim 7, wherein the protective cross beam is hollow and tubular, and the protective cross beam is internally provided with a honeycomb type third reinforcing rib.
9. The integrated rear cross beam assembly according to claim 1, wherein the rear traction device comprises two pin openings and a matching surface, the matching surface is attached to the front and rear surfaces of the first rear cross beam, and the two pin openings are arranged at the upper end and the lower end of the matching surface at intervals.
10. The integrated rear cross beam assembly of claim 1, wherein the integrated rear cross beam assembly is an all aluminum cast structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192313.3A CN112278076A (en) | 2020-10-30 | 2020-10-30 | Integrated rear cross beam assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192313.3A CN112278076A (en) | 2020-10-30 | 2020-10-30 | Integrated rear cross beam assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112278076A true CN112278076A (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011192313.3A Pending CN112278076A (en) | 2020-10-30 | 2020-10-30 | Integrated rear cross beam assembly |
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| CN (1) | CN112278076A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113264002A (en) * | 2021-05-26 | 2021-08-17 | 一汽解放汽车有限公司 | Vehicle rear protection device and vehicle |
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| CN210191596U (en) * | 2019-06-20 | 2020-03-27 | 一汽解放汽车有限公司 | Rear protection device for commercial vehicle |
| CN210234907U (en) * | 2019-07-18 | 2020-04-03 | 三一专用汽车有限责任公司 | Commercial car protector |
| CN210555121U (en) * | 2019-09-25 | 2020-05-19 | 江苏吉宏特专用汽车制造有限公司 | Girder structure of sewage suction truck |
| CN111521410A (en) * | 2020-05-09 | 2020-08-11 | 东风商用车有限公司 | Vehicle frame for commercial vehicle cab road vibration simulation endurance test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203005334U (en) * | 2012-11-21 | 2013-06-19 | 云南力帆骏马车辆有限公司 | Rear safety protection device for lightweight dump truck |
| CN205202856U (en) * | 2015-11-04 | 2016-05-04 | 云南力帆骏马车辆有限公司 | Double as packing box guardrail behind light truck of footboard of ascending a height |
| CN110126920A (en) * | 2019-05-15 | 2019-08-16 | 东风商用车有限公司 | A kind of transom beam assembly |
| CN210191596U (en) * | 2019-06-20 | 2020-03-27 | 一汽解放汽车有限公司 | Rear protection device for commercial vehicle |
| CN210234907U (en) * | 2019-07-18 | 2020-04-03 | 三一专用汽车有限责任公司 | Commercial car protector |
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| CN113264002A (en) * | 2021-05-26 | 2021-08-17 | 一汽解放汽车有限公司 | Vehicle rear protection device and vehicle |
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Application publication date: 20210129 |
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