CN114261358B - Vehicle rear-end collision buffer structure and vehicle - Google Patents
Vehicle rear-end collision buffer structure and vehicle Download PDFInfo
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- CN114261358B CN114261358B CN202111522478.7A CN202111522478A CN114261358B CN 114261358 B CN114261358 B CN 114261358B CN 202111522478 A CN202111522478 A CN 202111522478A CN 114261358 B CN114261358 B CN 114261358B
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Abstract
The embodiment of the application provides a vehicle rear-end collision buffer structure and a vehicle, relates to the technical field of vehicle safety, and aims to solve the problem that the vehicle rear-end collision buffer structure cannot be recovered after being impacted. The vehicle rear-end collision buffer structure provided by the embodiment of the application comprises an energy absorption module and a reset mechanism. The energy absorption module is used for being arranged on the body of the vehicle, the energy absorption module can move relative to the body of the vehicle in the running direction of the vehicle, the energy absorption module comprises a front anti-collision piece and a rear anti-collision piece which are opposite, the front anti-collision piece is located in front of the rear anti-collision piece along the running direction of the vehicle, and the front anti-collision piece and the rear anti-collision piece are connected through a buffer piece. The reset mechanism is used for being fixedly connected to the body of the vehicle, and the acting end of the reset mechanism is connected with the energy absorption module and used for applying force towards the rear of the vehicle to the energy absorption module. The vehicle rear-end collision buffer structure provided by the embodiment of the application is used for being arranged at the rear of a vehicle so as to buffer the impact of the vehicle in the process of a rear-end collision accident.
Description
Technical Field
The application relates to the technical field of vehicle safety, in particular to a vehicle rear-end collision buffer structure and a vehicle.
Background
The vehicle rear-end collision is a typical traffic accident, the probability of occurrence is high, the threat to personal safety is serious, and particularly, the rear-end collision of a truck is easier to cause serious consequences. In order to alleviate the impact of a collision during a rear-end collision accident of a vehicle, a rear-end collision buffer structure for fixing at a position near the rear of the vehicle, including a front plate, a rear plate and an elastic member, is disclosed in the related art. The front plate and the rear plate are arranged along the running direction of the vehicle, the front plate is fixed on the body of the vehicle, the rear plate is connected with the front plate through an elastic piece, and the rear plate is positioned behind the front plate. In the rear-end collision process of the vehicle, the front of the vehicle positioned at the rear collides with the rear plate first, and the rear plate presses the elastic member to move in a direction approaching the front plate after being collided. In this process, the elastic deformation of the elastic member can cushion the impact of the collision.
However, this rear-end collision buffer structure of a vehicle has a problem that the impact of the collision of the vehicle is ultimately received by the front plate during the rear-end collision, the front plate is highly stressed, which is extremely liable to cause problems such as deformation of the front plate and breakage of the junction between the front plate and the vehicle, and the rear-end collision buffer structure of a vehicle is liable to be permanently damaged by the collision, unable to recover, and has a large loss.
Disclosure of Invention
In view of this, the embodiment of the application provides a vehicle rear-end collision buffer structure and a vehicle, so as to solve the problem that the vehicle rear-end collision buffer structure cannot be restored after being impacted.
In order to achieve the above objective, a first aspect of the embodiments of the present application provides a rear-end collision buffer structure for a vehicle, which includes an energy absorbing module and a reset mechanism. The energy absorption module is arranged on the body of the vehicle, can move relative to the body of the vehicle in the running direction of the vehicle, comprises a front anti-collision member and a rear anti-collision member which are opposite, and is positioned in front of the rear anti-collision member along the running direction of the vehicle, and is connected with the rear anti-collision member through a buffer member; the reset mechanism is used for being fixedly connected to the body of the vehicle, and the acting end of the reset mechanism is connected with the energy absorption module and used for applying force towards the rear of the vehicle to the energy absorption module.
Further, the reset mechanism comprises a pressure cylinder and an action rod, wherein the pressure cylinder is fixedly connected to the body of the vehicle along the running direction of the vehicle, one end of the action rod is hermetically and slidably arranged in the pressure cylinder, the other end of the action rod is connected with the energy absorption module, a pressure medium is communicated in the pressure cylinder, and the increase of the pressure medium in the pressure cylinder can enable the action rod to move towards the rear of the vehicle along the pressure cylinder so as to push the energy absorption module to move towards the rear of the vehicle.
Further, the interior of the pressure cylinder is adapted to communicate with a tank or water tank of the vehicle.
Further, an action bar is attached to the front surface of the front bumper.
Further, the action bars are hinged to the front surface of the front bumper.
Further, the pressure cylinder is formed with the mount pad far away from the one end of energy-absorbing module, is formed with the mounting hole on the mount pad, wears to be equipped with the fastener in the mounting hole, and the fastener is used for with mount pad and automobile body fixed connection.
Further, a first sliding block is formed on the front anti-collision member and is used for being connected with the vehicle body in a sliding mode along the running direction of the vehicle, and a second sliding block is formed on the rear anti-collision member and is used for being connected with the vehicle body in a sliding mode along the running direction of the vehicle.
Further, a flexible cushioning layer is provided on the rear surface of the rear bumper.
Further, the flexible cushioning layer completely covers the rear surface of the rear bumper.
Further, the flexible buffer layer is made of foam or rubber.
Further, the cushion member includes a spring extending in a traveling direction of the vehicle, one end of the spring being connected to the front bumper member, and the other end being connected to the rear bumper member.
Further, the buffer piece also comprises a damping rod, the damping rod is arranged outside the spring sleeve, one end of the damping rod is connected with the front anti-collision piece, and the other end of the damping rod is connected with the rear anti-collision piece.
Further, the cushion member further includes a cushion bushing provided at a rear surface of the front bumper, and ends of the spring and the damper rod are abutted against the cushion bushing.
Further, the rear surface of the front bumper is provided with a bushing mounting hole corresponding to the cushion bushing, and the cushion bushing is arranged in the bushing mounting hole.
Further, a spring, a damping member and a cushion bushing form a set of cushion members, and a plurality of sets of cushion members are provided between the front bumper member and the rear bumper member.
A second aspect of the embodiment of the present application provides a vehicle, including a vehicle body and the rear-end collision buffer structure provided in the first aspect of the embodiment of the present application. The energy absorption module of the vehicle rear-end collision buffer structure is arranged at a position, close to the rear side of the vehicle body, the energy absorption module can move relative to the vehicle body in the running direction of the vehicle, and the reset mechanism of the vehicle rear-end collision buffer structure is fixedly connected with the vehicle body.
Further, the top of the energy absorption module is in sliding connection with the bottom of the vehicle body.
Further, the energy absorption module is in sliding connection with a rear longitudinal beam of the vehicle body.
Further, a T-shaped sliding groove is formed in the rear longitudinal beam, a T-shaped sliding block is correspondingly arranged on one side of the energy absorption module, facing the rear longitudinal beam, and the energy absorption module can be connected with the rear longitudinal beam in a sliding mode through sliding of the T-shaped sliding block in the T-shaped sliding groove.
According to the vehicle rear-end collision buffer structure provided by the embodiment of the application, the front anti-collision member is positioned in front of the rear anti-collision member, the front head of the vehicle positioned at the rear can collide with the rear anti-collision member firstly in the process of a rear-end collision accident of the vehicle, the front anti-collision member and the rear anti-collision member are connected through the buffer member, the rear anti-collision member can move towards the direction close to the front anti-collision member after being collided, and the buffer member can play a role in buffering in the process of moving the rear anti-collision member towards the direction close to the front anti-collision member, so that collision impact of the vehicle is buffered. The energy absorption module in the embodiment of the application can move relative to the vehicle body in the vehicle running direction, namely, the front anti-collision piece is not directly fixed on the vehicle body, the front anti-collision piece can move relative to the vehicle body in the vehicle running direction, the front anti-collision piece moves towards the direction close to the rear anti-collision piece after being impacted, the buffer piece between the front anti-collision piece and the rear anti-collision piece can apply thrust to the front anti-collision piece, and the front anti-collision piece can move forwards under the action of the thrust. The acting end of the resetting mechanism is used for applying force towards the rear of the vehicle to the energy-absorbing module, and the acting end of the resetting mechanism can prevent the energy-absorbing module from moving forwards, so that the impact of vehicle collision is transmitted to the resetting mechanism by the energy-absorbing module. The action end of the reset mechanism can move in the running direction of the vehicle and has a certain buffer effect, so that one end of the reset mechanism, which is fixed with the vehicle body of the vehicle, and the front anti-collision member cannot be subjected to larger impact, and larger damage is not easy to occur. And after the two vehicles with rear-end collision are separated, the acting end of the reset mechanism can move backwards to push the energy absorption module to return to the position before the collision, so that the vehicle rear-end collision buffer mechanism realizes the reset after the collision, can be repeatedly used for a plurality of times, and has small loss.
Drawings
FIG. 1 is a schematic view of a vehicle body according to an embodiment of the present application;
FIG. 2 is a perspective view of a rear-end collision buffering structure of a vehicle according to an embodiment of the present application;
FIG. 3 is a front view of a rear-end collision buffer structure of a vehicle according to an embodiment of the present application;
FIG. 4 is a left side view of a rear end collision buffer structure of a vehicle according to an embodiment of the present application;
fig. 5 is a right side view of a rear-end collision buffer structure in an embodiment of the present application.
Reference numerals:
1-a vehicle body; 11-headstock; 12-vehicle tail; 13-the underbody of the vehicle body; 14-rear stringers; 141-T-shaped slots; 2-an energy absorption module; 21-a front bumper; 211-a first slider; 212-front impact body; 214-bushing mounting holes; 22-rear bump; 221-a second slider; 222-rear impact body; 23-cushioning member; 231-springs; 232-a damping rod; 233-a buffer liner; 24-a flexible buffer layer; 3-a reset mechanism; 31-a pressure cylinder; 311-mounting seats; 3111-mounting holes; 32-action bars; 321-an action end of the reset mechanism; a-vertical direction.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments of the present application and the technical features of the embodiments may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the gist of the present application and should not be construed as unduly limiting the present application.
In embodiments of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Furthermore, in the embodiments of the present application, the terms "upper," "lower," "left," and "right," etc., are defined with respect to the orientation in which the components in the drawings are schematically disposed, and it should be understood that these directional terms are relative terms, which are used for descriptive and clarity with respect to each other, and which may vary accordingly with respect to the orientation in which the components in the drawings are disposed.
In embodiments of the present application, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either a fixed connection, a removable connection, or an integral unit; can be directly connected or indirectly connected through an intermediate medium.
In embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment of the present application is not to be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Rear-end collisions are a typical traffic accident with a high probability of occurrence. The automobile rear-end collision protection device is a typical traffic accident for trucks and special vehicles, has high probability of occurrence, has serious threat to personal safety, and is easier to cause serious consequences especially for the rear-end collision of trucks. Specifically, the wheels of a truck are generally larger, so that the truck body is relatively higher, and when a rear-end collision accident occurs, a car is easy to drill into the lower part of the truck body from the rear of the truck, and is easy to be seriously damaged, especially for a long rear-suspension truck, the drilling length of the car is larger, and the damage is more serious.
In order to alleviate the impact of a collision during a rear-end collision accident of a vehicle, a rear-end collision buffer structure for fixing at a position near the rear of the vehicle, including a front plate, a rear plate and an elastic member, is disclosed in the related art. The front plate and the rear plate are arranged along the running direction of the vehicle, the front plate is fixed on the body of the vehicle, the rear plate is connected with the front plate through an elastic piece, and the rear plate is positioned behind the front plate. In the rear-end collision process of the vehicle, the front of the vehicle positioned at the rear collides with the rear plate first, and the rear plate presses the elastic member to move in a direction approaching the front plate after being collided. In this process, the elastic deformation of the elastic member can cushion the impact of the collision.
However, this rear-end collision buffer structure of a vehicle has a problem that the impact of the collision of the vehicle is ultimately received by the front plate during the rear-end collision, the front plate is highly stressed, which is extremely liable to cause problems such as deformation of the front plate and breakage of the junction between the front plate and the vehicle, and the rear-end collision buffer structure of a vehicle is liable to be permanently damaged by the collision, unable to recover, and has a large loss. Especially when this vehicle buffer gear is used for setting up in the bottom of automobile body for prevent that the car from getting into the freight train bottom, the front bezel often only has the upper end fixed with the bottom of automobile body, is cantilever beam type structure, and the junction of front bezel and automobile body is very weak, is difficult to bear great impact.
In view of this, referring to fig. 1 and 2, in order to provide safety of a vehicle, an embodiment of the present application provides a vehicle including a vehicle body 1 and a rear-end collision buffer structure. The energy absorbing module 2 of the rear-end collision buffer structure is arranged at a position, close to the rear, of the vehicle body 1, and the energy absorbing module 2 can move relative to the vehicle body 1 in the running direction of the vehicle, and the reset mechanism 3 of the rear-end collision buffer structure is fixedly connected with the vehicle body 1.
Referring to fig. 1 and 2, the rear-end collision buffer structure provided in the embodiment includes an energy absorbing module 2 and a reset mechanism 3. The energy absorption module 2 is arranged on the vehicle body 1 of the vehicle, the energy absorption module 2 can move relative to the vehicle body 1 in the running direction of the vehicle, the energy absorption module 2 comprises a front anti-collision member 21 and a rear anti-collision member 22 which are opposite, the front anti-collision member 21 is positioned in front of the rear anti-collision member 22 in the running direction of the vehicle, and the front anti-collision member 21 and the rear anti-collision member 22 are connected through a buffer member 23. The return mechanism 3 is fixedly connected to the body 1 of the vehicle, and an active end 321 of the return mechanism is connected to the energy-absorbing module 2 and is used for applying a force to the energy-absorbing module 2 towards the rear of the vehicle. In such a structural form, the front bumper 21 is located in front of the rear bumper 22, and in the process of a rear-end collision accident of the vehicle, the front 11 of the vehicle located behind collides with the rear bumper 22 first, the front bumper 21 and the rear bumper 22 are connected by the buffer member 23, the rear bumper 22 moves in a direction approaching the front bumper 21 after being collided, and the buffer member 23 plays a role in buffering the collision impact of the vehicle in a process that the rear bumper 22 moves in a direction approaching the front bumper 21. The energy absorbing module 2 in the embodiment of the application can move relative to the vehicle body 1 in the vehicle running direction, that is, the front bumper 21 is not directly fixed on the vehicle body 1, the front bumper 21 can move relative to the vehicle body 1 in the vehicle running direction, the front bumper 21 moves towards the rear bumper 22 after being impacted, the buffer 23 between the front bumper 21 and the rear bumper 22 can apply thrust to the front bumper 21, and the front bumper 21 can move forward under the action of the thrust. The active end 321 of the return mechanism is used to apply a force to the energy-absorbing module 2 towards the rear of the vehicle, and the active end 321 of the return mechanism can prevent the energy-absorbing module 2 from moving forward, so that the impact of the vehicle collision is transmitted to the return mechanism 3 by the energy-absorbing module 2. The acting end 321 of the resetting mechanism can move in the running direction of the vehicle, and has a certain buffering effect, so that the front anti-collision member 21 and one end, fixed with the body 1 of the vehicle, of the resetting mechanism 3 cannot be impacted greatly, and large damage is not easy to occur. After the collision is finished and two vehicles with rear-end collision are separated, the acting end 321 of the resetting mechanism can move backwards to push the energy absorption module 2 to return to the position before the collision, so that the vehicle rear-end collision buffer mechanism realizes the resetting after the collision, can be repeatedly used for a plurality of times, and has small loss.
Note that, referring to fig. 1 and 2, the forward movement refers to movement in a direction approaching the vehicle head 11 in a vertical direction of the vertical direction a. The rearward movement means movement in a direction approaching the vehicle tail 12 in a direction perpendicular to the vertical direction a. The front of the traveling direction of the vehicle means the side of the traveling direction of the vehicle that is close to the head 11, and the rear of the traveling direction of the vehicle means the side of the traveling direction of the vehicle that is close to the tail 12, the traveling direction of the vehicle being perpendicular to the vertical direction a.
It should be noted that, referring to fig. 1 and 2, in the process of a rear-end collision accident of the vehicle, the distance between the front bumper 21 and the rear bumper 22 changes more than the displacement of the acting end 321 of the return mechanism. The moving distance of the acting end 321 of the reset mechanism is smaller, which is favorable for improving the reliability and stability of the rear collision buffer structure of the vehicle, preventing the rear collision preventing member 22 from generating larger displacement in the collision process of the vehicle, and ensuring the rear collision preventing member 22 to move more stably. In addition, for a rear-end collision accident of a truck, if a car collides with the rear bumper 22, the car may still dig into the lower part of the truck body 1 if the rear bumper 22 is displaced greatly, and the penetration distance is long, so that serious damage occurs.
It should be noted that, if the impact to the rear bumper 22 is reduced by increasing the buffering distance between the front bumper 21 and the rear bumper 22, the length of the bumper 23 needs to be increased, and the longer distance between the bumper 23 affects the stability of the connection between the front bumper 21 and the rear bumper 22, and further affects the stability of the movement of the rear bumper 22 after the impact.
In some embodiments, referring to fig. 1 and 2, the top of the energy absorbing module 2 is slidably coupled to the bottom 13 of the vehicle body. In this way, the energy-absorbing module 2 is arranged at the bottom 13 of the vehicle body, which is advantageous for avoiding that a vehicle located behind during a rear-end collision of the vehicle drills under the vehicle body 1 of a vehicle located in front.
There are many possible ways of moving the energy-absorbing module 2 relative to the body 1 of the vehicle in the direction of travel of the vehicle. For example, in some embodiments, the energy absorber module 2 is slidably coupled to the body 1 of the vehicle in the direction of vehicle travel. In some other embodiments, the energy-absorbing module 2 can also be suspended from the body 1 of the vehicle by means of a rope.
In some embodiments, referring to fig. 2, 3 and 4, a first slider 211 is formed on the front bumper 21, the first slider 211 is for sliding connection with the vehicle body 1 along the vehicle running direction, and a second slider 221 is formed on the rear bumper 22, and the second slider 221 is for sliding connection with the vehicle body 1 along the vehicle running direction. In this way, the energy absorbing module 2 is firmly connected with the vehicle body 1, and the front anti-collision member 21 and the rear anti-collision member 22 move stably along the running direction of the vehicle.
In some embodiments, the front bump guard 21 includes a first slider 211, a front bump guard body 212, and a first reel. The first slider 211 is slidably connected to the vehicle body 1, the front impact body 212 is connected to the buffer 23, the first reel is fixed to the first slider 211, and the front impact body 212 is suspended from the first reel by a rope wound around the first reel. In this way, the front collision preventing body 212 is used for colliding with the vehicle, and both the swinging of the rope in the vehicle running direction and the sliding of the first slider 211 can enable the front collision preventing body 212 to move in the vehicle running direction. Specifically, when the vehicle collides with the front impact body 212, the rope wound around the first reel swings in the traveling direction of the vehicle, and then the rope is tensioned and pulls the first slider 211 to slide with respect to the vehicle body 1. It will be appreciated that in order to ensure the stability of the installation of the front bumper 21, the length of the rope cannot be too long, and the swing distance of the rope in the vehicle traveling direction is small, the purpose of the rope is mainly to buffer the impact force by the swing of the rope when the vehicle collides, further enhancing the reliability of the rear-end collision buffer mechanism.
In some embodiments, the rear bump 22 includes a second slider 221, a rear bump body 222, and a second reel. The second slider 221 is slidably connected to the vehicle body 1, the rear anti-collision body 222 is connected to the buffer 23, the second reel is fixed to the second slider 221, and the rear anti-collision body 222 is suspended from the second reel by a rope wound around the second reel. In this way, the rear impact body 222 is configured to collide with the vehicle, and both the swinging of the rope in the vehicle traveling direction and the sliding of the second slider 221 enable the rear impact body 222 to move in the vehicle traveling direction. Specifically, when the vehicle collides with the rear impact body 222, the rope wound around the second reel swings in the vehicle traveling direction, and then the rope is tensioned and pulls the second slider 221 to slide with respect to the vehicle body 1. It will be appreciated that in order to ensure stability in the installation of the front bumper 22, the length of the rope cannot be too long, and the swing distance of the rope in the vehicle running direction is small, the purpose of the rope is mainly to buffer the impact force by the swing of the rope when the vehicle collides, and further enhance the reliability of the rear-end collision buffer mechanism.
On the basis of the sliding connection between the top of the energy absorption module 2 and the bottom 13 of the vehicle body, in some embodiments, referring to fig. 2, 3 and 4, the front bumper 21 has a plate-shaped structure, the front bumper 21 is disposed along the width direction of the vehicle, the upper end of the front bumper 21 is formed with a plurality of first sliding blocks 211, the plurality of first sliding blocks 211 are arranged along the width direction of the vehicle, and each first sliding block 211 is slidably connected with the bottom 13 of the vehicle body. In this way, the sliding connection of the front crash element 21 with the vehicle is relatively stable. On this basis, it is preferable that the number of the first sliders 211 is two in some embodiments, and the two sliders are located at both ends of the front bumper 21 in the vehicle width direction.
On the basis of the sliding connection between the top of the energy absorption module 2 and the bottom 13 of the vehicle body, in some embodiments, referring to fig. 2, 3 and 4, the rear bumper 22 has a plate-shaped structure, the rear bumper 22 is disposed along the width direction of the vehicle, a plurality of second sliding blocks 221 are formed at the upper end of the rear bumper 22, the plurality of second sliding blocks 221 are arranged along the width direction of the vehicle, and each second sliding block 221 is slidably connected with the bottom 13 of the vehicle body. In this manner, the sliding connection of the rear bumper 22 to the vehicle is relatively secure. On this basis, in some embodiments, the number of the second sliders 221 is two, and the two sliders are located at both ends of the rear bumper 22 in the vehicle width direction.
In some embodiments, referring to fig. 2, 3 and 4, the energy absorbing module 2 is slidably coupled to the rear side rail 14 of the vehicle body 1. In this way, the rear longitudinal beam 14 of the vehicle body 1 is a part of the vehicle body 1 with high strength and rigidity, and the energy absorption module 2 is mounted on the rear longitudinal beam 14, so that the vehicle body 1 can be sufficiently supported. On this basis, in some embodiments, a T-shaped chute is formed on the rear longitudinal beam 14, and a T-shaped slider (please refer to reference numeral 211 or 221 in the figure, which is an embodiment of the present disclosure) is correspondingly disposed on a side of the energy absorption module 2 facing the rear longitudinal beam 14, and the energy absorption module 2 can be slidably connected to the rear longitudinal beam 14 by sliding the T-shaped slider in the T-shaped chute. On this basis, in some embodiments, a T-shaped slot 141 is provided on the side of the rear longitudinal beam 14 facing the ground, a T-shaped slider is provided on the upper side of the energy absorption module 2, and the energy absorption module 2 is slidingly connected below the rear longitudinal beam 14.
Further, referring to fig. 5, the reset mechanism 3 includes a pressure cylinder 31 and an action rod 32, the pressure cylinder 31 is fixedly connected to the vehicle body 1 along the running direction of the vehicle, one end of the action rod 32 is hermetically slid in the pressure cylinder 31, the other end is connected to the energy absorbing module 2, a pressure medium is connected in the pressure cylinder 31, and the increase of the pressure medium in the pressure cylinder 31 can enable the action rod 32 to move towards the rear of the vehicle along the pressure cylinder 31 so as to push the energy absorbing module 2 to move towards the rear of the vehicle. In this way, the other end of the action bar 32 can support the energy absorbing module 2 by applying the energy absorbing module 2 toward the rear of the vehicle. One end of the action rod 32 is sealed in the pressure cylinder 31 and is urged by the pressure medium. The pressure medium can flow, so that one end of the action bar 32 connected with the energy absorption module 2 can perform certain displacement under the driving of the motion of the energy absorption module 2, the energy absorption module 2 is buffered to a certain extent, and the impact on the energy absorption module 2 is reduced. When the collision is finished, the two rear-end vehicles are separated, a worker can convey pressure medium into the pressure cylinder 31, and the pressure medium in the pressure cylinder 31 is increased to enable the acting rod 32 to move towards the rear of the vehicle along the pressure cylinder 31 so as to push the energy absorption module 2 to return to the initial position.
Preferably, in some embodiments, referring to FIG. 5, to facilitate installation between the active beam 32 and the energy absorber module 2, in some embodiments, the active beam 32 is attached to the front surface of the front bumper 21. It should be noted that the connection between the other end of the actuating rod 32 and the energy-absorbing module 2 can be implemented in various ways. May be welded, threaded, snapped, connected by fasteners, abutted, etc. In some embodiments, the apply lever 32 is hinged to the front surface of the front bumper 21. In this way, the connection between the action rod 32 and the front bumper 21 can rotate relatively without a large stress during the movement of the front bumper 21 due to the thrust of the bumper 23.
In some embodiments, the interior of the pressure tube 31 is adapted to communicate with a tank or water tank of the vehicle. In this way, the oil in the oil tank or the water in the water tank is used as the pressure medium in the pressure cylinder 31, and no other structure for providing the pressure medium is required to be arranged on the vehicle body 1, so that the arrangement of the rear-end collision buffer structure on the vehicle body 1 is facilitated. On this basis, in some embodiments, the pressure cylinder 31 and the action bars 32 constitute a hydraulic cylinder. Of course, in some other embodiments, the resetting mechanism 2 may also be a pneumatic cylinder, which is in communication with an air pump for introducing air into the cylinder.
In some embodiments, referring to fig. 5, a mounting seat 311 is formed at an end of the pressure cylinder 31 away from the energy absorption module 2, a mounting hole 3111 is formed on the mounting seat 311, and a fastener is inserted into the mounting hole 3111, and is used for fixedly connecting the mounting seat 311 with the vehicle body 1. In such a structural form, the installation and the disassembly of workers are convenient. Specifically, during the process of installing the pressure cylinder 31, a worker may first install the energy absorbing module 2 and the installation seat 311 on the vehicle body 1, and then fix the end of the pressure cylinder 31 away from the installation seat 311 with the energy absorbing module 2. On the basis, in some embodiments, the rear-end collision buffer mechanism is used for being installed on a truck, and the reset mechanism 3 is fixedly connected with a beam at the bottom of the truck.
Preferably, in some embodiments, referring to fig. 5, the mounting seat 311 has a plate-shaped structure, the mounting seat 311 is arranged in a direction perpendicular to a vehicle traveling direction, and the mounting hole 3111 penetrates opposite side walls of the mounting seat 311 in the vehicle traveling direction. In such a structural form, the stress direction of the mounting seat 311 is the same as the extending direction of the fastener, and the reliability of the connection part of the mounting seat 311 and the vehicle is higher. On this basis, in some embodiments, the number of the mounting holes 3111 is plural, and the plurality of mounting holes 3111 are arranged in an array on the layout of the mount 311. Preferably, in some embodiments, the mounting seat 311 is in a rectangular plate-mounted structure, the number of the mounting holes 3111 is four, and the four mounting holes 3111 are respectively located at four corners of the mounting seat 311.
Further, referring to fig. 5, in order to enhance the cushioning effect of the rear-end collision cushioning structure, in some embodiments, a flexible cushioning layer 24 is provided on the rear surface of the rear bumper 22. In this manner, the deformation of the flexible buffer layer 24 is able to buffer the impact of a vehicle collision. Specifically, in the rear-end collision process of the vehicle, the vehicle located at the rear collides with the flexible buffer layer 24 first, the impact force of the collision is buffered for the first time, the flexible buffer layer 24 transmits the impact force to the buffer member 23 through the rear bumper member 22, and the buffer member 23 buffers the impact force for the second time. On this basis, in some embodiments, the flexible buffer layer 24 may be made of foam or rubber.
During the installation of the flexible bumper 24, a worker may first install the rear bumper 22 to the vehicle body 1 and then install the flexible bumper 24 to the rear bumper 22. In this way, the assembly of the crash-proof element and the flexible buffer layer 24 is mounted to the vehicle body 1 with respect to the worker, which is more convenient for the worker to operate.
To enhance the cushioning effect of the flexible cushioning layer 24, referring to FIG. 5, in some embodiments, the flexible cushioning layer 24 completely covers the rear surface of the rear bumper 22. On this basis, in some embodiments, the rear bumper 22 has a plate-like structure, and the flexible cushioning layer 24 completely covers the rear surface of the rear bumper 22. In this way, the coverage area of the flexible buffer layer 24 is larger, and the buffer effect is better.
To enhance the cushioning effect of the flexible cushioning layer 24, in some embodiments, both the front bumper 21 and the rear bumper 22 are made of stainless steel. The rigidity strength of the stainless steel is high, and the stainless steel is suitable for bearing the impact of vehicle collision in the rear-end collision process.
Further, the buffer member 23 may have various implementation forms, for example, the buffer member 23 may be a hydraulic buffer, a pneumatic buffer, or the like, or the compression spring 231, or the like. In some embodiments, referring to fig. 5, the cushion 23 includes a spring 231 extending in the vehicle traveling direction, and one end of the spring 231 is connected to the front bumper 21 and the other end is connected to the rear bumper 22. During a vehicle striking the rear bumper 22, the rear bumper 22 approaches the front bumper 21, and the springs 231 compress to cushion the impact received by the rear bumper 22. It should be noted that, the connection between the spring 231 and the front bumper 21 and the connection between the spring 231 and the rear bumper 22 may be a direct connection, such as welding, through a fastening member, or abutting, or may be an indirect connection through other parts, for example, in some embodiments, a telescopic rod is disposed between the front bumper 21 and the rear bumper 22, and two ends of the spring 231 are respectively connected with two ends of the telescopic rod. In this way, the spring 231 is integrally formed with the telescopic rod, so as to be conveniently installed between the front bumper 21 and the rear bumper 22 as a buffer room.
In order to enhance the cushioning effect of the cushioning member 23, in some embodiments, referring to fig. 5, the cushioning member 23 further includes a damping rod 232 disposed outside the damping rod 232 and sleeved on the spring 231, wherein one end of the damping rod 232 is connected to the front bumper member 21, and the other end is connected to the rear bumper member 22. In such a structural form, the arrangement of the damping rod 232 can effectively relieve the rebound phenomenon of the compressed spring 231, which is beneficial to avoiding the secondary damage to the vehicle at the rear in the rear-end collision process.
In order to enhance the cushioning effect of the cushioning member 23, in some embodiments, referring to fig. 5, the cushioning member 23 further includes a cushioning bushing 233, the cushioning bushing 233 is disposed on the rear surface of the front bumper 21, and the ends of the spring 231 and the damping rod 232 are abutted against the cushioning bushing 233. On this basis, in some embodiments, the rear surface of the front bumper 21 is provided with a bush mounting hole 214 corresponding to the cushion bush 233, and the cushion bush 233 is disposed in the bush mounting hole 214. Specifically, in the process of installing the cushion 23, the front bumper 21 and the rear bumper 22 are both installed on the vehicle body 1, then the cushion bushings 233 are installed in the corresponding bushing installation holes 214, and finally one end of the assembly of the damper rod 232 and the spring 231 is abutted against the cushion bushings 233, and the other end is connected with the rear bumper 22. On this basis, in some embodiments, the front bumper 21 has a plate-shaped structure, and the bushing mounting holes 214 are through holes penetrating opposite sides of the front bumper 21. Of course, in some embodiments, the bushing mounting holes 214 may also be blind holes.
Preferably, in some embodiments, referring to fig. 5, a spring 231, a damping member and a buffer sleeve 233 form a set of buffer members 23, and a plurality of sets of buffer members 23 are provided between the front bumper member 21 and the rear bumper member 22. In this way, the arrangement of the plurality of groups of cushioning members 23 can enhance the cushioning effect. Preferably, in some embodiments, the plurality of sets of cushioning elements 23 are arranged in an array in a plane perpendicular to the direction of travel of the vehicle. On this basis, in some embodiments, the front bumper 21 and the rear bumper 22 are both rectangular plate structures, the front bumper 21 and the rear bumper 22 are both arranged along the vertical direction of the vehicle running direction, the number of the buffer members 23 is four, one ends of the four buffer members 23 are respectively connected with four corners of the front bumper 21, and the other ends of the four buffer members 23 are respectively connected with four corners of the rear bumper 22.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (15)
1. A rear-end collision buffer structure for a vehicle, characterized by comprising:
the energy absorption module is arranged on the vehicle body of the vehicle, can move relative to the vehicle body of the vehicle in the running direction of the vehicle, comprises a front anti-collision member and a rear anti-collision member which are opposite, is positioned in front of the rear anti-collision member along the running direction of the vehicle, and is connected with the rear anti-collision member through a buffer member;
the action end of the resetting mechanism is connected with the energy absorption module and is used for applying force towards the rear of the vehicle to the energy absorption module;
the resetting mechanism comprises a pressure cylinder and an action rod, wherein the pressure cylinder is fixedly connected to a vehicle body of the vehicle along the running direction of the vehicle, one end of the action rod is hermetically and slidably arranged in the pressure cylinder, the other end of the action rod is connected with the energy absorption module, a pressure medium is communicated in the pressure cylinder, and the action rod can move towards the rear of the vehicle along the pressure cylinder due to the increase of the pressure medium in the pressure cylinder so as to push the energy absorption module to move towards the rear of the vehicle;
the action rod is connected to the front surface of the front anti-collision member and hinged with the front surface of the front anti-collision member;
the front anti-collision member is provided with a first sliding block which is used for being connected with the vehicle body in a sliding mode along the running direction of the vehicle, and the rear anti-collision member is provided with a second sliding block which is used for being connected with the vehicle body in a sliding mode along the running direction of the vehicle.
2. The vehicle rear end collision buffering structure according to claim 1, wherein the pressure cylinder is internally provided for communication with an oil tank or a water tank of a vehicle.
3. The rear-end collision buffering structure of claim 1, wherein a mounting seat is formed at one end of the pressure cylinder, which is far away from the energy absorption module, a mounting hole is formed in the mounting seat, and a fastener is arranged in the mounting hole in a penetrating manner and is used for fixedly connecting the mounting seat with the vehicle body.
4. The vehicle rear end collision buffering structure according to claim 1, wherein a flexible buffering layer is provided on a rear surface of the rear bumper.
5. The vehicle rear end collision buffering structure of claim 4, wherein the flexible buffering layer completely covers the rear surface of the rear bumper.
6. The vehicle rear end collision buffering structure according to claim 5, wherein the flexible buffering layer is made of foam or rubber.
7. The vehicle rear end collision buffering structure according to any one of claims 1 to 6, wherein the buffering member includes a spring extending in a vehicle traveling direction, one end of the spring is connected to the front collision preventing member, and the other end is connected to the rear collision preventing member.
8. The rear-end collision buffering structure according to claim 7, wherein the buffering member further comprises a damping rod, the spring is sleeved outside the damping rod, one end of the damping rod is connected with the front collision preventing member, and the other end of the damping rod is connected with the rear collision preventing member.
9. The vehicle rear end collision buffering structure according to claim 8, wherein the buffering member further comprises a buffering bushing provided at a rear surface of the front collision preventing member, and the spring and the end portion of the damper rod are abutted against the buffering bushing.
10. The vehicle rear-end collision buffering structure according to claim 9, wherein a rear surface of the front bumper is provided with a bush mounting hole corresponding to the buffering bush, and the buffering bush is disposed in the bush mounting hole.
11. The rear-end collision buffering structure for vehicles according to claim 9, wherein one of the springs, one of the damper rods and one of the buffering bushes constitute a set of buffering members, and a plurality of sets of the buffering members are provided between the front collision preventing member and the rear collision preventing member.
12. A vehicle, characterized by comprising:
a vehicle body;
the vehicle rear-end collision buffering structure according to any one of claims 1 to 11, wherein the energy-absorbing module of the vehicle rear-end collision buffering structure is disposed at a position near the rear of the vehicle body, the energy-absorbing module is movable relative to the vehicle body in a vehicle traveling direction, and the return mechanism of the vehicle rear-end collision buffering structure is fixedly connected with the vehicle body.
13. The vehicle of claim 12, wherein the energy absorber module top is slidably coupled to the vehicle body bottom.
14. The vehicle of claim 13, wherein the energy absorber module is slidably coupled to a rear side rail of the body.
15. The vehicle according to claim 14, wherein a T-shaped chute is formed on the rear side member, and a T-shaped slider is correspondingly disposed on a side of the energy absorption module facing the rear side member, and the energy absorption module is slidably connected to the rear side member by sliding the T-shaped slider in the T-shaped chute.
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| CN202111522478.7A CN114261358B (en) | 2021-12-13 | 2021-12-13 | Vehicle rear-end collision buffer structure and vehicle |
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| CN202111522478.7A CN114261358B (en) | 2021-12-13 | 2021-12-13 | Vehicle rear-end collision buffer structure and vehicle |
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| CN114261358A CN114261358A (en) | 2022-04-01 |
| CN114261358B true CN114261358B (en) | 2023-10-24 |
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| CN202111522478.7A Active CN114261358B (en) | 2021-12-13 | 2021-12-13 | Vehicle rear-end collision buffer structure and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114941294A (en) * | 2022-06-28 | 2022-08-26 | 山东高速交建集团济南养护科技有限公司 | High-speed maintenance construction area safety protection system and device |
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| CN114261358A (en) | 2022-04-01 |
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