Buffer device and vehicle

Abstract

The utility model discloses a buffering device and a vehicle, and the buffering device comprises a bumper; a skeleton; the first support is connected to the framework, the first support is provided with a collapsing part used for collapsing under the impact of external force, and a containing cavity protruding forwards is formed in the collapsing part; the anti-collision beams are arranged on the rear side of the bumper at intervals; the second support is connected with the anti-collision beam, the second support is provided with a sliding part, the sliding part is arranged in the containing cavity in a relative sliding mode in the front-back direction, a gap is formed between the front end of the sliding part and the front inner wall of the containing cavity, and the crumple part is suitable for colliding with the sliding part after sliding by a preset distance relative to the sliding part under the action of external force; therefore, the crumple part is separated from the first support. Therefore, through the arrangement of the buffering device, when the buffering device is subjected to low-speed collision, the effect that the crumple part is separated from the first support can be achieved, so that the risk that the bumper and the framework are damaged is reduced, and then the later maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a buffer device and a vehicle. Background Art

[0002] With the development of the automobile industry, the number of vehicles is increasing. Traffic accidents are inevitable in daily life. Among them, front bumper rear-end collisions or pedestrian collisions caused by low-speed collisions account for the largest proportion. Therefore, how the design of the front bumper can reduce collision damage to pedestrians and reduce maintenance costs is worthy of consideration by the current automobile industry.

[0003] In the related technology, the existing front bumper takes into account the buffering protection of pedestrians in low-speed collisions, mainly by increasing the front and rear distance from the bumper appearance to the anti-collision beam to provide as much buffering space as possible. The internal parts are easily damaged after a low-speed collision. If the internal large frame and other high-cost parts are damaged, new parts can only be replaced, and the maintenance cost increases. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a buffer device, which can make the collapsed part detach from the first bracket after being subjected to the collision force, thereby reducing the risk of damage to the bumper and the frame, and further reducing the subsequent maintenance cost.

[0005] The utility model further provides a vehicle.

[0006] According to the first aspect of the utility model, the buffer device includes: a bumper; a frame, the frame is connected to the rear side of the bumper; a first bracket, the first bracket is connected to the frame, the first bracket is provided with a collapse portion for collapsing under the impact of external force, the collapse portion forms a accommodating cavity protruding forward; an anti-collision beam, the anti-collision beam is arranged at the rear side of the bumper at intervals; a second bracket, the second bracket is connected to the anti-collision beam, the second bracket is provided with a sliding portion, the sliding portion is relatively slidably arranged in the accommodating cavity along the front and rear directions, a gap is formed between the front end of the sliding portion and the front inner wall of the accommodating cavity, the collapse portion is suitable for colliding with the sliding portion after sliding relative to the sliding portion for a predetermined distance under the action of external force, so that the collapse portion is separated from the first bracket.

[0007] Therefore, by providing the buffer device, when it is subjected to a low-speed collision, the collapsed portion can be separated from the first bracket, thereby reducing the risk of damage to the bumper and the frame, and further reducing the subsequent maintenance costs.

[0008] In some examples of the present invention, the first bracket is further provided with a main body portion, the collapse portion is provided in the middle of the main body portion, the collapse portion includes a plurality of collapse holes, and the plurality of collapse holes are spaced around the outer circumference of the accommodating cavity.

[0009] In some examples of the present invention, a plurality of connection parts are arranged between the main body and the collapse part, the collapse hole is formed between two adjacent connection parts, the connection part located above and / or below the collapse part is a first connection part and the connection part located on the left and / or right side of the collapse part is a second connection part, and the length of the first connection part is greater than the length of the second connection part.

[0010] In some examples of the present invention, a plurality of supporting ribs are arranged at intervals on the inner wall of the accommodating cavity, and the sliding portion is in contact with at least one of the supporting ribs.

[0011] In some examples of the utility model, the sliding portion includes: a straight section, which is attached to the supporting rib; a wavy section, which is connected to the rear side of the straight section, and the wavy section is formed with at least one raised section and at least one recessed section, and the raised section and the recessed section are alternately connected in the front-to-back direction.

[0012] In some examples of the present invention, the sliding portion is provided with a latch tongue, and the collapsed portion is provided with a latch hole, the latch tongue is latched in the latch hole, and the distance between the front end of the latch tongue and the front-to-back direction of the collapsed portion is greater than the distance between the front end of the sliding portion and the front inner wall of the accommodating cavity in the front-to-back direction.

[0013] In some examples of the present invention, the skeleton is provided with an avoidance hole, the avoidance hole penetrates the skeleton along the front-to-back direction, and the projection of the collapsed portion on the skeleton along the front-to-back direction is located within the avoidance hole.

[0014] In some examples of the utility model, along the left-right direction, the frame is provided with a first protrusion protruding backward, the first bracket is provided with a second protrusion protruding backward, the second protrusion is sleeved on the first protrusion and is detachably connected to the first protrusion by a fastener.

[0015] In some examples of the present invention, the first bracket is a plastic bracket, and the second bracket is a sheet metal bracket; and / or the anti-collision beam is provided with a nut, and the second bracket is provided with a through hole, and the bolt is passed through the through hole and cooperates with the nut; and / or the second bracket is also provided with a guide part, and the guide part is connected to the front end of the sliding part, and an opening is formed at the front end of the accommodating cavity, and the guide part is inclined downward and extends out of the opening.

[0016] A vehicle according to a second aspect of the utility model comprises: the above-mentioned buffer device.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a buffer device according to an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the anti-collision beam and the second bracket in the left and right directions according to an embodiment of the utility model;

[0021] Figure 3 is a schematic structural diagram of a skeleton and a first bracket according to an embodiment of the utility model;

[0022] Figure 4 yes Figure 3 Sectional view in the AA direction;

[0023] Figure 5 is a schematic structural diagram of a skeleton, a first bracket and a second bracket according to an embodiment of the utility model;

[0024] Figure 6 is an exploded view of a frame, a first bracket and a second bracket according to an embodiment of the utility model;

[0025] Figure 7 is a cross-sectional view of a skeleton, a first bracket and a second bracket according to an embodiment of the utility model;

[0026] Figure 8 is a front view of a first bracket according to an embodiment of the utility model;

[0027] Fig. 9 It is a schematic structural diagram of a second bracket according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] 100. Buffer device;

[0030] 1. Bumper;

[0031] 2. first bracket; 21. collapse portion; 211. accommodating cavity; 2111. supporting rib; 2112. opening; 212. collapse hole; 213. clamping hole; 22. main body; 23. connecting portion; 231. first connecting portion; 232. second connecting portion; 24. second protruding portion; 25. leaf nut; 26. bolt;

[0032] 3. Anti-collision beam;

[0033] 4. second bracket; 41. sliding portion; 411. straight section; 412. wavy section; 4121. raised section; 4122. recessed section; 413. tongue; 42. perforation; 43. guide portion;

[0034] 5. Frame; 51. Avoidance hole; 52. First protrusion. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0036] Reference below Figure 1-Figure 9 The buffer device 100 according to the embodiment of the utility model is described, which can make the collapse portion 21 detach from the first bracket 2 after being subjected to a collision force, thereby reducing the risk of damage to the bumper 1 and the frame 5, and further reducing the subsequent maintenance cost.

[0037] Combination Figure 1-Figure 9 As shown, the buffer device 100 according to the first embodiment of the utility model comprises a bumper 1, a frame 5, a first bracket 2, an anti-collision beam 3 and a second bracket 4. The buffer device 100 is mainly installed on the front frame of the vehicle, and it mainly plays a role of collision protection at the front of the vehicle. The bumper 1 is located at the front and rear ends of the vehicle, usually covering the outside of the vehicle body. It is the outermost protective component of the vehicle, which can absorb and disperse the impact energy during a minor collision, reduce damage to the vehicle body, and provide a certain degree of pedestrian protection, thereby reducing harm to pedestrians. The frame 5 is connected between the bumper 1 and the first bracket 2, which can enhance the structural strength and bending and torsional rigidity of the bumper 1, reduce the risk of damage to the bumper 1 when it is subjected to collision force, and can also provide installation and structural reinforcement for the parts inside the bumper 1 (such as lamps, radars, wiring harnesses and other components); the anti-collision beam 3 is located behind the bumper 1, usually made of high-strength steel, and is part of the frame structure. It can absorb and disperse the impact energy during a collision, reduce damage to passengers in the vehicle and the vehicle structure, and maintain the integrity of the vehicle structure. The first bracket 2 and the second bracket 4 can indirectly connect the bumper 1 to the anti-collision beam 3, ensuring that the anti-collision beam 3 can play an effective role during a collision, and can also absorb a certain degree of collision energy, thereby reducing harm to pedestrians during a collision.

[0038] Specifically, the frame 5 is connected to the rear side of the bumper 1, the first bracket 2 is connected to the frame 5, the first bracket 2 is provided with a collapse portion 21 for collapsing under the impact of external force, the collapse portion 21 forms a accommodating cavity 211 protruding forward, the anti-collision beam 3 is arranged at intervals on the rear side of the bumper 1, the second bracket 4 is connected to the anti-collision beam 3, the second bracket 4 is provided with a sliding portion 41, the sliding portion 41 is relatively slidably arranged in the accommodating cavity 211 along the front and rear directions, a gap is formed between the front end of the sliding portion 41 and the front inner wall of the accommodating cavity 211, the collapse portion 21 is suitable for colliding with the sliding portion 41 after sliding a predetermined distance relative to the sliding portion 41 under the action of external force, so that the collapse portion 21 is separated from the first bracket 2.

[0039] Specifically, the first bracket 2 is connected to the rear side of the skeleton 5, the anti-collision beam 3 is connected to the second bracket 4, and the anti-collision beam 3 is arranged at intervals on the rear side of the bumper 1. When a collision occurs, the collapse portion 21 on the first bracket 2 can absorb as much collision energy as possible through controllable deformation of the structure, thereby achieving the effect of buffering the collision force.

[0040] Among them, in the front-to-back direction, the accommodating cavity 211 on the crushing portion 21 protrudes forward, and the sliding portion 41 on the second bracket 4 can be relatively slidably arranged in the accommodating cavity 211, and a gap (that is, a buffer distance) is formed between the front end of the sliding portion 41 and the front inner wall of the accommodating cavity 211. In this way, when the bumper 1 is subjected to a low-speed backward collision force, the collision force can be transmitted to the frame 5 and then to the first bracket 2. After the bumper 1 and the frame 5 are subjected to the force, they are deformed and displaced toward the rear and drive the first bracket 2 to move backward. In this way, after the distance that the front inner wall of the accommodating cavity 211 moves backward exceeds the length of the gap, it will collide with the sliding portion 41 on the second bracket 4, so that the crushing portion 21 on the first bracket 2 can be crushed and deformed and detached from the first bracket 2. Since the crushing portion 21 has absorbed the collision energy as much as possible, the risk of damage to the bumper 1 and the frame 5 is effectively reduced, thereby reducing the subsequent maintenance cost.

[0041] In addition, the collapsed portion 21 is suitable for colliding with the sliding portion 41 after sliding a predetermined distance relative to the sliding portion 41 under the action of external force, so that the collapsed portion 21 is separated from the first bracket 2, that is, when the collapsed portion 21 is subjected to a preset collision force (which can be a range greater than a certain critical value), the collapsed portion 21 will slide a predetermined distance (that is, a buffer distance) relative to the sliding portion 41 until it contacts and collides with the sliding portion 41, and at this time the collapsed portion 21 is separated from the first bracket 2.

[0042] In detail, when the bumper 1 is subjected to a low-speed collision in the backward direction, the collision force is transmitted from the bumper 1 to the frame 5, and then from the frame 5 to the first bracket 2. The first bracket 2 drives the bumper 1 and the frame 5 to slide backward on the second bracket 4, thereby achieving the effect of buffering the collision force; when the buffering movement is less than the set buffering distance (that is, the gap distance formed by the front end of the sliding part 41 and the front inner wall of the accommodating cavity 211), there will be no damage to the parts at this time; when the buffering movement is greater than the designed buffering distance, the sliding part 41 at the front end of the second bracket 4 and the first bracket 2 are in contact and impact, and when the impact force is large, it will cause the collapse part 21 at the first bracket 2 to break, and the collapse part 21 will separate from the first bracket 2. The bumper 1 and the frame 5 can effectively reduce their own damage risk after the collapse part 21 has absorbed the collision energy to the maximum extent due to the collapse deformation. In summary, through the above force transmission, relative displacement of parts, local contact and collapse, it is possible to achieve pedestrian protection and reduce the subsequent maintenance cost after the vehicle collision.

[0043] Therefore, by providing the buffer device 100, when it is subjected to a low-speed collision, the collapse portion 21 can be separated from the first bracket 2, thereby reducing the risk of damage to the bumper 1 and the frame 5, and further reducing the subsequent maintenance costs.

[0044] According to some optional embodiments of the present invention, combined with Figure 5 , Figure 6 and Figure 8 As shown, the first bracket 2 is also provided with a main body 22, and the collapsed portion 21 is arranged in the middle of the main body 22. The collapsed portion 21 is arranged in the middle of the main body 22, so that the stress can be more evenly distributed on the main body 22, thereby reducing the problem of stress concentration; and it can also reduce the structural weakening of the weak stress area (such as the edge) on the second bracket 4, thereby effectively ensuring the structural stability and integrity of the main body 22.

[0045] Furthermore, combined with Figure 5-Figure 8 As shown, the collapse portion 21 includes a plurality of collapse holes 212, and the plurality of collapse holes 212 are spaced around the outer periphery of the accommodating cavity 211, and the collapse holes 212 are arranged to penetrate along the front-to-back direction. The above arrangement can form a weak stress area (that is, a collapse area) at the outer periphery of the accommodating cavity 211 of the collapse portion 21, which is more likely to collapse under a certain degree of external force than other areas of the second bracket 4, thereby ensuring that the collapse portion 21 can smoothly produce collapse deformation and even detachment after being subjected to a preset collision force.

[0046] Specifically, combined Figure 5-Figure 8As shown, a plurality of connecting parts 23 are provided between the main body 22 and the collapsed part 21, and a collapse hole 212 is formed between two adjacent connecting parts 23. It can be understood that the main body 22 and the collapsed part 21 are connected by a plurality of connecting parts 23, and a collapse hole 212 is formed between two adjacent connecting parts 23, so that the collapsed part 21 can be normally connected to the main body 22 when it is not subjected to a collision force; and when the collapsed part 21 is subjected to a collision force, it is more likely to be torn by an external force due to its weak force, resulting in a collapse and detachment phenomenon, thereby ensuring that the collapsed part 21 plays a collapse buffering effect.

[0047] In addition, the connection parts 23 located above and below the collapsed part 21 are first connection parts 231, and the connection parts 23 located on the left and right sides of the collapsed part 21 are second connection parts 232. The length of the first connection part 231 is greater than the length of the second connection part 232, so that the connection strength of the middle part of the first bracket 2 in the up and down direction can be ensured, so that the first bracket 2 can bear the up and down weight of the bumper 1, thereby reducing the risk of accidental cracking of the collapsed part 21 during driving vibration. For example, refer to Figure 8 As shown, the length of the first connection portion 231 is L2, the length of the second connection portion 232 is L1, and L2>L1.

[0048] According to some optional embodiments of the present invention, combined with Figure 7 As shown, a plurality of supporting ribs 2111 are arranged at intervals on the inner wall of the accommodating cavity 211 , and the sliding portion 41 is in contact with at least one supporting rib 2111 .

[0049] Furthermore, a plurality of support ribs 2111 are arranged at intervals on the upper inner wall of the accommodating cavity 211, and the upper surface of the sliding portion 41 is in contact with the lower surface of at least one support rib 2111. The support ribs 2111 can provide a supporting effect on the sliding portion 41, and can also improve the structural strength and bending and torsional stiffness of the collapse portion 21 in the up and down directions, thereby reducing the risk of accidental cracking of the collapse portion 21 during driving vibration.

[0050] Specifically, combined Figure 6 , Figure 7 and Fig. 9 As shown, the sliding portion 41 includes a straight section 411 and a wavy section 412. The straight section 411 is attached to the supporting rib 2111, and the wavy section 412 is connected to the rear side of the straight section 411. The wavy section 412 is formed with at least one raised section 4121 and at least one recessed section 4122. The raised sections 4121 and the recessed sections 4122 are alternately connected in the front-to-back direction.

[0051] Among them, in the front-to-back direction, the straight section 411 and the wavy section 412 are connected in sequence, and the surface of the straight section 411 is flat, which can increase the force-bearing area of ​​the straight section 411 and the support rib 2111, thereby improving the force uniformity between the two.

[0052] In addition, compared to a straight surface, the raised section 4121 and the recessed section 4122 can increase the weight and spatial mode of the wave section 412 , thereby effectively improving the structural strength and bending and torsional stiffness of the wave section 412 , and further improving the structural reliability of the sliding portion 41 .

[0053] According to some optional embodiments of the present invention, combined with Figure 6 , Figure 7 and Fig. 9 As shown, the sliding portion 41 is provided with a latch tongue 413, and the collapsed portion 21 is provided with a latch hole 213. The latch tongue 413 is latched in the latch hole 213, and the latch tongue 413 of the sliding portion 41 is latched with the latch hole 213 of the collapsed portion 21, thereby improving the connection stability of the first bracket 2 and the second bracket 4.

[0054] In addition, the distance between the front end of the latch tongue 413 and the front-to-back direction of the collapse portion 21 is greater than the distance between the front end of the sliding portion 41 and the front inner wall of the accommodating cavity 211. This arrangement can reduce the risk of the latch tongue 413 pre-contacting the collapse portion 21 when the front end of the sliding portion 41 has not collided with the front inner wall of the accommodating cavity 211, thereby ensuring that a preset buffer distance is maintained between the sliding portion 41 and the collapse portion 21 (the collapse portion 21 does not collapse and disengage within this buffer distance).

[0055] According to some optional embodiments of the present invention, combined with Figure 6 and Figure 7 As shown, the skeleton 5 is provided with an avoidance hole 51 , which penetrates the skeleton 5 along the front-to-back direction, and the projection of the collapsed portion 21 on the skeleton 5 along the front-to-back direction is located in the avoidance hole 51 .

[0056] Among them, the avoidance hole 51 on the skeleton 5 covers the projection of the collapsed part 21 on the skeleton 5 along the front-to-back direction, so that the collapsed part 21 can smoothly pass through the avoidance hole 51 after detaching from the first bracket 2 (that is, the avoidance hole 51 avoids the collapsed part 21), thereby reducing the damage to the skeleton 5 and further reducing the subsequent maintenance costs.

[0057] Specifically, combined Figure 4 , Figure 6 and Figure 8 As shown, along the left-right direction, the frame 5 is provided with a first protruding portion 52 protruding backwards, and the first bracket 2 is provided with a second protruding portion 24 protruding backwards, and the second protruding portion 24 is sleeved on the first protruding portion 52 .

[0058] It can be understood that the first protrusion 52 on the skeleton 5 and the second protrusion 24 on the first bracket 2 can respectively increase their own spatial modes, thereby improving the structural strength and bending and torsional stiffness of the skeleton 5 and the first bracket 2. The second protrusion 24 is mounted on the first protrusion 52, which can also improve the connection strength between the two.

[0059] The second protrusion 24 is sleeved on the first protrusion 52 , and positioning guide surfaces are formed on the upper and lower surfaces of the first protrusion 52 , which can ensure the installation accuracy between the two on the one hand, and improve the installation efficiency of the two on the other hand.

[0060] In addition, the second protrusion 24 is detachably connected to the first protrusion 52 via a fastener. For example, the first protrusion 52 on the first bracket 2 and the second protrusion 24 on the frame 5 are screwed together via a leaf nut 25 (a leaf nut 25 is a special nut with a spring or elastic component, which can provide an additional locking function under vibration or impact conditions to prevent the nut from loosening during use) and a bolt 26, so that the two can be connected as a whole on the one hand, and on the other hand, the nut can be prevented from loosening during long-term vibration use, thereby improving the connection reliability between the first bracket 2 and the frame 5.

[0061] According to some optional embodiments of the utility model, the first bracket 2 is a plastic bracket, and the second bracket 4 is a sheet metal bracket. Among them, plastic has the characteristics of low density, light weight, and easy molding. The first bracket 2 is a plastic bracket, which can effectively reduce the manufacturing cost; sheet metal has the characteristics of high structural strength. The second bracket 4 is a sheet metal bracket, which can effectively improve the structural reliability of the second bracket 4 and ensure that the sliding part 41 can smoothly collide and fall off the collapsed part 21.

[0062] Specifically, combined Figure 2 and Fig. 9 As shown, the anti-collision beam 3 is provided with a nut, the second bracket 4 is provided with a through hole 42, and the bolt is matched with the nut after passing through the through hole 42.

[0063] It can be understood that compared with the traditional connection form of welding the sheet metal bracket to the anti-collision beam (if the sheet metal bracket is damaged after the collision, the sheet metal bracket needs to be cut off and a new bracket needs to be re-welded during maintenance, which increases the maintenance cost and maintenance man-hours), the second bracket 4 in this case is fastened to the anti-collision beam 3 by bolts, and nuts are welded or riveted on the anti-collision beam 3. When the vehicle is involved in a low-speed collision, the damaged second bracket 4 can be quickly disassembled and corrected or replaced, thereby reducing maintenance costs and time.

[0064] Furthermore, combined with Figure 7 and Fig. 9As shown, the second bracket 4 is also provided with a guide portion 43, which is connected to the front end of the sliding portion 41, and an opening 2112 is formed at the front end of the accommodating cavity 211. The guide portion 43 is inclined downward, and the guide portion 43 extends out of the opening 2112. Such an arrangement can provide an installation guiding effect when the second bracket 4 is assembled with the first bracket 2, thereby improving the installation efficiency between the two.

[0065] The vehicle according to the embodiment of the second aspect of the utility model includes the buffer device 100 of the above embodiment. After a low-speed collision occurs, the vehicle with the buffer device 100 can reduce the problem of damage to high-cost parts while achieving pedestrian protection, thereby reducing subsequent maintenance costs and improving the market competitiveness of the entire vehicle.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0067] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0071] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A buffer device, characterized in that: include: bumper; a frame connected to the rear side of the bumper; A first bracket, the first bracket is connected to the frame, the first bracket is provided with a collapsing portion for collapsing under an external force impact, and the collapsing portion is formed with a accommodating cavity protruding forward; An anti-collision beam, the anti-collision beam is arranged at intervals on the rear side of the bumper; The second bracket is connected to the anti-collision beam, the second bracket is provided with a sliding part, the sliding part is relatively slidably arranged in the accommodating cavity along the front and rear directions, a gap is formed between the front end of the sliding part and the front inner wall of the accommodating cavity, and the collapsed part is suitable for colliding with the sliding part after sliding a predetermined distance relative to the sliding part under the action of external force, so that the collapsed part is separated from the first bracket.

2. The buffer device according to claim 1, characterized in that: The first bracket is also provided with a main body, the collapsed part is provided in the middle of the main body, the collapsed part includes a plurality of collapsed holes, and the plurality of collapsed holes are spaced around the outer circumference of the accommodating cavity.

3. The buffer device according to claim 2, characterized in that: A plurality of connection parts are arranged between the main body and the collapse part, and the collapse hole is formed between two adjacent connection parts. The connection part located above and / or below the collapse part is a first connection part, and the connection part located on the left and / or right side of the collapse part is a second connection part. The length of the first connection part is greater than the length of the second connection part.

4. The buffer device according to claim 1, characterized in that: The inner wall of the accommodating cavity is provided with a plurality of supporting ribs at intervals, and the sliding part is in contact with at least one of the supporting ribs.

5. The buffer device according to claim 4, characterized in that: The sliding portion comprises: A straight section, wherein the straight section is attached to the supporting rib; The wavy segment is connected to the rear side of the straight segment, the wavy segment is formed with at least one convex segment and at least one concave segment, and the convex segment and the concave segment are alternately connected in the front-to-back direction.

6. The buffer device according to claim 1, characterized in that: The sliding part is provided with a latch tongue, and the collapsed part is provided with a latch hole, the latch tongue is latched in the latch hole, and the distance between the front end of the latch tongue and the front-to-back direction of the collapsed part is greater than the distance between the front end of the sliding part and the front inner wall of the accommodating cavity in the front-to-back direction.

7. The buffer device according to claim 1, characterized in that: The frame is provided with an avoidance hole, the avoidance hole penetrates the frame along the front-to-back direction, and the projection of the collapsed portion on the frame along the front-to-back direction is located in the avoidance hole.

8. The buffer device according to claim 7, characterized in that: Along the left-right direction, the frame is provided with a first protruding portion protruding backwards, the first bracket is provided with a second protruding portion protruding backwards, the second protruding portion is sleeved on the first protruding portion and is detachably connected to the first protruding portion through a fastener.

9. The buffer device according to claim 1, characterized in that: The first bracket is a plastic bracket, and the second bracket is a sheet metal bracket; and / or The anti-collision beam is provided with a nut, the second bracket is provided with a through hole, and the bolt is passed through the through hole and then matched with the nut; and / or The second bracket is further provided with a guide portion, the guide portion is connected to the front end of the sliding portion, the front end of the accommodating cavity is formed with an opening, and the guide portion is inclined downward and extends out of the opening.

10. A vehicle, characterized in that: include: The buffer device according to any one of claims 1 to 9.

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