Hydraulic energy absorption box, anti-collision beam assembly and vehicle

Abstract

The utility model discloses a kind of hydraulic energy-absorbing box, anti-collision beam assembly and vehicle, the hydraulic energy-absorbing box includes: first box body, define first cavity;Second box body, with first box body arrangement in front-back direction, and one end enters first cavity, and second box body is movable between initial position and energy-absorbing position along front-back direction relative to first box body, second cavity and filled with fluid that second box body defines, second box body is equipped with fluid inlet and fluid outlet that are communicated between first cavity and second cavity;First check valve, first check valve is located in fluid outlet position, second check valve, second check valve is located in fluid inlet position, reset spring, reset spring is connected between first box body and second box body.According to the hydraulic energy-absorbing box of the utility model, not only can impact energy be effectively absorbed, after the completion of collision process, second box body can be restored to initial position under the elastic force of reset spring, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a hydraulic energy-absorbing box, a crash beam assembly, and a vehicle. Background Technology

[0002] Automotive crash beams play a crucial role in vehicle safety. In the event of a collision, they effectively absorb the impact force and transfer the energy to the rear longitudinal beams and other structures at the rear of the vehicle, thus protecting occupants and pedestrians and ultimately meeting the requirements of front-end protection and collision regulations. Currently, however, after a collision, many automotive crash beams and energy-absorbing boxes deform and break during the energy absorption process, resulting in high repair costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a hydraulic energy-absorbing box that can naturally recover after a collision, reducing maintenance costs.

[0004] This utility model also proposes an anti-collision beam assembly having the above-mentioned hydraulic energy-absorbing box.

[0005] According to a first aspect of the present invention, a hydraulic energy-absorbing box includes: a first box body defining a first cavity inside the first box body; a second box body arranged in a front-rear direction with respect to the first box body, one end of the second box body extending into the first cavity, and the second box body being movable relative to the first box body in the front-rear direction between an initial position and an energy-absorbing position; the second cavity defined by the second box body being filled with fluid; and the second box body having a fluid inlet and a fluid outlet communicating between the first cavity and the second cavity; a first one-way valve located at the fluid outlet position and configured to allow fluid to flow unidirectionally from the second cavity toward the first cavity; a second one-way valve located at the fluid inlet position and configured to allow fluid to flow unidirectionally from the first cavity toward the second cavity; and a return spring connected between the first box body and the second box body and configured to always drive the second box body to move toward the initial position.

[0006] According to the present invention, the hydraulic energy-absorbing box is designed to be movable relative to the first box between an initial position and an energy-absorbing position. A return spring is connected between the first and second boxes. When the impact force is within the energy-absorbing range of the hydraulic energy-absorbing box, the second box can effectively absorb impact energy by squeezing out fluid, moving towards the first cavity, and pushing the return spring to deform. After the collision process is completed, the second box can return to its initial position under the elastic force of the return spring. Thus, the hydraulic energy-absorbing box can achieve collision energy absorption without damage, reducing maintenance costs.

[0007] In some embodiments, the number of return springs is multiple, and the multiple return springs are arranged at circumferential intervals in the second housing.

[0008] In some embodiments, the hydraulic energy-absorbing box further includes: a first fixing plate and a second fixing plate, wherein the first fixing plate is fixed to one end of the second box body that extends into the first cavity, and the second fixing plate is fixed to the first cavity in the front-back direction toward the inner wall of the second box body, and in the front-back direction, the two ends of the reset spring are respectively fixedly connected to the first fixing plate and the second fixing plate.

[0009] In some embodiments, the hydraulic energy-absorbing box further includes: a guide frame disposed within the first box body, the guide frame defining a guide channel extending in a front-rear direction, and one end of the second box body slidably engaging within the guide channel.

[0010] In some embodiments, the guide frame includes two side plates extending in a front-back direction and spaced apart in a first direction. Each of the two side plates has two limiting plates extending in a front-back direction and spaced apart in a second direction on its opposite side surface. The two side plates and the four limiting plates cooperate to enclose the guide channel. The first direction, the second direction, and the front-back direction are perpendicular to each other.

[0011] In some embodiments, the side plate is provided with a guide hole that passes through the side plate in the first direction and the guide hole extends in the front-back direction. The end of the second housing that extends into the first cavity is provided with a first fixing plate. The first fixing plate is provided with a guide protrusion, and the guide protrusion is slidably engaged in the guide hole.

[0012] In some embodiments, the fluid outlet is formed on the upper surface of the end of the second housing that extends into the first cavity. The first one-way valve includes: a first housing, a first valve core, and a first elastic member. The first housing has a first inlet and a first outlet. The first inlet is formed at the bottom of the first housing and is directly opposite the fluid outlet in the vertical direction. The first outlet is located on one side of the first housing in the front-rear direction. The first valve core is movably disposed within the first housing in the vertical direction via the first elastic member, and the first valve core is configured to block the first inlet under gravity. The fluid inlet is formed on the lower surface of the end of the second housing that extends into the first cavity. The second one-way valve includes: a second housing, a second valve core, and a second elastic member. The second housing has a second inlet and a second outlet. The second inlet is formed on one side of the first housing in the front-rear direction. The second outlet is located at the top of the second housing and is directly opposite the fluid inlet in the vertical direction. The second valve core is movably disposed within the second housing in the front-rear direction via the second elastic member, and the second elastic member always pushes the second valve core to block the second inlet.

[0013] In some embodiments, the first elastic element is a sponge element, and / or, the lower end face of the first valve core is an inclined surface extending upward and toward the first outlet; the second elastic element is a sponge element, and / or, the upper surface of the second valve core is an inclined surface extending upward and toward a direction away from the second inlet.

[0014] Furthermore, According to the second aspect of the present invention, the anti-collision beam assembly includes an anti-collision beam and a hydraulic energy-absorbing box according to the first aspect of the present invention, wherein there are two hydraulic energy-absorbing boxes, which are respectively connected to both ends of the anti-collision beam.

[0015] According to the present invention, the overall performance of the anti-collision beam assembly is improved by setting the hydraulic energy-absorbing box of the first aspect mentioned above.

[0016] The vehicle according to the third aspect of the present invention includes a crash beam assembly according to the second aspect of the present invention.

[0017] The vehicle according to this utility model improves the overall performance of the vehicle by providing the anti-collision beam assembly described in the second aspect.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1This is a structural schematic diagram of the hydraulic energy-absorbing box according to an embodiment of the present utility model; Figure 2 It is along Figure 1 The cross-sectional view of line AA shown; Figure 3 yes Figure 1 A cross-sectional view of the hydraulic energy-absorbing box from another angle, as shown; Figure 4 yes Figure 2 A partial enlarged view of the hydraulic energy-absorbing box at the first check valve position; Figure 5 yes Figure 2 A partial enlarged view of the hydraulic energy-absorbing box at the second check valve position; Figure 6 This is a structural schematic diagram of the anti-collision beam assembly according to an embodiment of the present utility model; Figure 7 yes Figure 6 A structural schematic diagram of the anti-collision beam assembly from another angle; Figure 8 yes Figure 6 The diagram shows the structure of the anti-collision beam, the trailer hook threaded pipe, and the trailer hook reinforcing plate. Figure 9 It is along Figure 8 The cross-sectional view of the BB line shown; Figure 10 It is along Figure 8 A cross-sectional view of the CC line shown; Figure 11 yes Figure 6 A schematic diagram of the first mounting plate shown; Figure 12 yes Figure 8 The diagram shows another angle of the anti-collision beam, trailer hook threaded tube, and trailer hook reinforcement plate.

[0020] Figure label: 10. Hydraulic energy-absorbing box; 11. First box body; 111. First cavity; 12. Second housing; 121. Second cavity; 122. Fluid inlet; 123. Fluid outlet; 13. First check valve; 131. First shell; 1311. First inlet; 1312. First outlet; 132. First valve core; 133. First elastic element; 14. Second check valve; 141. Second shell; 1411. Second inlet; 1412. Second outlet; 142. Second valve core; 143. Second elastic element; 15. Return spring; 16. First fixing plate; 161. Guide protrusion; 17. Second fixing plate; 18. Guide frame; 181. Guide channel; 182. Side plate; 1821. Guide hole; 183. Limiting plate; 191. First mounting plate; 1911. Reinforcing ring; 192. Second mounting plate; 193. Connecting plate; 20. Anti-collision beam; 21. Mounting surface; 30. Trailer hook threaded pipe; 40. Trailer hook reinforcement plate; 100. Anti-collision beam assembly. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] The following is for reference. Figures 1-12 The hydraulic energy-absorbing box 10 according to a first aspect embodiment of the present invention is described.

[0023] like Figures 1-3 As shown, the hydraulic energy-absorbing box 10 according to the first aspect embodiment of the present invention includes: a first box body 11, a second box body 12, a first one-way valve 13, a second one-way valve 14, and a return spring 15.

[0024] Specifically, the first housing 11 defines a first cavity 111 on its inner side; the second housing 12 is arranged in the front-rear direction with the first housing 11, and one end of the second housing 12 extends into the first cavity 111. The second housing 12 is movable relative to the first housing 11 in the front-rear direction between an initial position and an energy-absorbing position. The second housing 12 defines a second cavity 121, which is filled with fluid. The second housing 12 is provided with a fluid inlet 122 and a fluid outlet 123 connecting the first cavity 111 and the second cavity 121. A first check valve 13 is located at the fluid outlet 123 and is configured to allow fluid to flow unidirectionally from the second cavity 121 toward the first cavity 111. A second check valve 14 is located at the fluid inlet 122 and is configured to allow fluid to flow unidirectionally from the first cavity 111 toward the second cavity 121. A return spring 15 is connected between the first housing 11 and the second housing 12 and is configured to always drive the second housing 12 to move toward the initial position.

[0025] like Figures 1-3As shown, the first box 11 can be a hollow column extending in the front-to-back direction, such as a cuboid, cylinder, elliptical column, or polygonal column. The rear end of the first box 11 is closed, and the front end of the first box 11 has an insertion port extending through the front wall of the first box 11 in the front-to-back direction. The second box 12 extends in the front-to-back direction as a hollow column, and the second box 12 can be a cuboid, cylinder, elliptical column, or polygonal column. The rear end of the second box 12 extends into the first box 11 through the insertion port. One of the first box 11 and the second box 12 is used to connect to the anti-collision beam 20, and the other is used to connect to the vehicle body.

[0026] Reference Figure 2 and Figure 3 As shown, the second housing 12 is movable relative to the first housing 11 in the front-back direction between an initial position and an energy-absorbing position. When the second housing 12 is in the initial position, the total length of the first housing 11 and the second housing 12 in the front-back direction is greater than the total length of the first housing 11 and the second housing 12 in the front-back direction when the second housing 12 is in the energy-absorbing position. In other words, the length of the portion of the second housing 12 extending into the first cavity 111 when the second housing 12 is in the initial position is less than the length of the portion of the second housing 12 extending into the first cavity 111 when the second housing 12 is in the energy-absorbing position.

[0027] Furthermore, the first cavity 111 of the first housing 11 is filled with fluid, and the second cavity 121 of the second housing 12 is filled with fluid, wherein the fluid can be a gas or a liquid. For example, the fluid filled in the first cavity 111 and the second cavity 121 can be hydraulic oil. The second housing 12 is formed with spaced-apart fluid inlets 122 and fluid outlets 123, wherein there can be one or more fluid inlets 122 and one or more fluid outlets 123. The first cavity 111 and the second cavity 121 are connected through the fluid inlets 122 and the fluid outlets 123.

[0028] like Figure 2As shown, a first check valve 13 is provided at the fluid outlet 123. The first check valve 13 is used to control the opening and closing of the fluid outlet 123. When the first check valve 13 opens the fluid outlet 123, it only allows the fluid in the second chamber 121 to flow into the first chamber 111 through the fluid outlet 123 and the first check valve 13, but does not allow the fluid in the first chamber 111 to flow into the second chamber 121 through the fluid outlet 123. At the same time, a second check valve 14 is provided at the fluid inlet 122. The second check valve 14 is used to control the opening and closing of the fluid inlet 122. When the second check valve 14 opens the fluid inlet 122, it only allows the fluid in the first chamber 111 to flow into the second chamber 121 through the fluid inlet 122 and the second check valve 14, but does not allow the fluid in the second chamber 121 to flow into the first chamber 111 through the fluid inlet 122.

[0029] A return spring 15 is connected between the first housing 11 and the second housing 12. The return spring 15 can be disposed within the first cavity 111 or on the outside of the first cavity 111. The return spring 15 can be arranged directly opposite the second housing 12 in the front-back direction, or it can be arranged around the periphery of the first housing 11. The return spring 15 is configured to elastically deform when the second housing 12 moves from its initial position to its energy-absorbing position, and to push the second housing 12 from its energy-absorbing position toward its initial position when it recovers its elastic deformation. When the second housing 12 is in its initial position, the return spring 15 can be in a state of no elastic deformation, or it can be in a compressed or stretched state, continuing to be compressed or stretched as the second housing 12 moves toward its energy-absorbing position.

[0030] In this embodiment, the hydraulic energy-absorbing box 10, when a vehicle is impacted, the impact force is transmitted to the hydraulic energy-absorbing box 10 through the anti-collision beam 20. This first compresses the second box 12, causing high pressure to be generated in the fluid within the second box 12. The fluid in the second chamber 121 then enters the first one-way valve 13 through the fluid outlet 123, and then flows through the first one-way valve 13 into the first chamber 111 of the first box 11. In other words, under the action of the impact force, the fluid in the first chamber 111 can be squeezed out through the fluid outlet 123 and the first one-way valve 13. During the process of fluid being squeezed out, the collision energy can be absorbed, thus achieving the function of energy absorption. Simultaneously, when the vehicle is impacted, the second box 12 can also move towards the energy-absorbing position under the action of the impact force. At this time, the return spring 15 also undergoes elastic deformation simultaneously. The movement of the second box 12 relative to the first box 11 towards the energy-absorbing position and the elastic deformation of the return spring 15 both absorb the collision energy, achieving the function of energy absorption and protecting the vehicle and pedestrians.

[0031] After the impact, the return spring 15 recovers its deformation and pushes the second box 12 to move toward the initial position. At this time, the fluid in the first chamber 111 can flow back into the second chamber 121 through the second check valve 14 and the fluid inlet 122. When the second box 12 returns to the initial position, the hydraulic energy absorption box 10 completes the reset.

[0032] According to the embodiment of the present invention, the hydraulic energy-absorbing box 10 is configured to allow the second box body 12 to move between the initial position and the energy-absorbing position relative to the first box body 11, and a return spring 15 is connected between the first box body 11 and the second box body 12. When the impact force is within the energy absorption range of the hydraulic energy-absorbing box 10, the second box body 12 of the hydraulic energy-absorbing box 10 can effectively absorb impact energy by squeezing out fluid, moving towards the first cavity 111, and pushing the return spring 15 to deform. After the collision process is completed, the second box body 12 can return to the initial position under the elastic force of the return spring 15. Thus, the hydraulic energy-absorbing box 10 can achieve collision energy absorption without damage, reducing maintenance costs.

[0033] In some embodiments of this utility model, such as Figure 3 As shown, there are multiple return springs 15, which are arranged circumferentially at intervals around the second housing 12. For example, the number of return springs 15 can be two, three, four, five, six, or more. By setting multiple return springs 15, the stress on a single return spring 15 can be reduced, and the multiple return springs 15 can evenly transmit the impact force of the second housing 12 to the first housing 11, improving the uniformity of force distribution and extending the service life of the hydraulic energy-absorbing box 10.

[0034] In some embodiments of this utility model, such as Figure 3 As shown, the hydraulic energy-absorbing box 10 may further include: a first fixing plate 16 and a second fixing plate 17. The first fixing plate 16 is fixed to one end of the second box body 12 that extends into the first cavity 111. The second fixing plate 17 is fixed to the first cavity 111 in the front-back direction toward the inner wall of the second box body 12. In the front-back direction, both ends of the return spring 15 are fixedly connected to the first fixing plate 16 and the second fixing plate 17, respectively. This facilitates the fixing of the return spring 15, improves the reliability of fixing the return spring 15, and increases assembly efficiency.

[0035] like Figure 2 and Figure 3As shown, the first fixing plate 16 is a flat plate arranged perpendicular to the front-back direction. The first fixing plate 16 is arranged on the rear side of the rear end of the second box 12 that extends into the first cavity 111 and is fixedly connected to the rear end face of the second box 12. In the left-right direction, the left and right ends of the first fixing plate 16 extend beyond the left and right side surfaces of the second box 12 respectively. The second fixing plate 17 is a flat plate arranged perpendicular to the front-back direction, and there are two second fixing plates 17. The two second fixing plates 17 are arranged on the left and right sides of the second box 12 respectively, and the two second fixing plates 17 are fixedly connected to the front side wall of the first cavity 111 of the first box 11 respectively.

[0036] There are two reset springs 15. The two reset springs 15 extend in the front-to-back direction and are respectively arranged on both sides of the second housing 12 in the left-to-right direction. The front end of the reset spring 15 is fixedly connected to the second fixing plate 17, and the rear end of the reset spring 15 is fixedly connected to the first fixing plate 16.

[0037] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the hydraulic energy-absorbing box 10 may further include: a guide frame 18, which is disposed within the first box body 11 and defines a guide channel 181 extending in the front-rear direction; one end of the second box body 12 (e.g., Figure 2 and Figure 3 The rear end of the second box 12 shown is slidably fitted within the guide channel 181. In this embodiment, by setting a guide frame 18 and defining the guide channel 181 through the guide frame 18, one end of the first box 11 is slidably fitted within the guide channel 181. This can guide and limit the forward and backward movement of the first box 11, preventing the first box 11 from tilting during forward and backward movement, ensuring that the hydraulic energy-absorbing box 10 can effectively absorb energy, and improving the stability and reliability of the hydraulic energy-absorbing box 10.

[0038] like Figure 2 and Figure 3 As shown, the guide frame 18 extends in the front-to-back direction. Both ends of the guide frame 18 in the front-to-back direction are connected to the front and rear side walls of the first cavity 111, respectively. The guide frame 18 defines a guide channel 181, which is closed at the rear end and open at the front end. The cross-section of the guide channel 181 perpendicular to the front-to-back direction is rectangular. The rear end of the second box 12 passes through the insertion port of the first box 11 and extends into the guide channel 181. The outer wall of the second box 12 can slide against the inner wall of the guide channel 181.

[0039] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the guide frame 18 may include components extending in the front-rear direction and in the first direction (e.g., Figure 2Two side plates 182 are arranged at intervals in the left-right direction (as shown in the diagram). The opposing side surfaces of the two side plates 182 are each provided with a feature extending in the front-back direction and in the second direction (e.g., in the second direction). Figure 3 The guide plate 183, arranged at intervals in the vertical direction (as shown), two side plates 182, and four limit plates 183 cooperate to enclose the guide channel 181, with the first direction, second direction, and front-back direction being perpendicular to each other. Thus, the structure of the guide frame 18 can be simplified while realizing the movement and guidance of the second box 12, making the processing, manufacturing, and assembly of the guide frame 18 more convenient.

[0040] like Figure 2 and Figure 3 As shown, the guide frame 18 includes two side plates 182, four limiting plates 183, and a connecting plate 193. The connecting plate 193 is a flat plate arranged perpendicular to the front-back direction. The connecting plate 193 is located in the first cavity 111 and is fixedly connected to the rear side wall of the first cavity 111. The two side plates 182 are flat plates arranged perpendicular to the left-right direction. The two side plates 182 are parallel and spaced apart in the left-right direction. The limiting plates 183 are flat plates arranged perpendicular to the up-down direction. Two limiting plates 183 are provided on the two opposite sides of the two side plates 182 in the left-right direction. The two limiting plates 183 on each side plate 182 are spaced apart in the up-down direction, and the limiting plates 183 on the two side plates 182 are spaced apart in the left-right direction and face each other. Furthermore, in the front-rear direction, the rear ends of the two side plates 182 and the rear ends of the four limiting plates 183 are connected to the connecting plate 193, and the front ends of the two side plates 182 and the front ends of the four limiting plates 183 are respectively fixedly connected to the two second fixing plates 17 arranged on the front side wall of the first cavity 111.

[0041] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the side plate 182 is provided with a first direction (e.g. Figure 3 As shown in the diagram, a guide hole 1821 extends through the side plate 182 in the left-right direction. The guide hole 1821 extends in the front-back direction. A first fixing plate 16 is provided at one end of the second box 12 that extends into the first cavity 111. The first fixing plate 16 is provided with a guide protrusion 161, which is slidably engaged in the guide hole 1821. In this embodiment, by engaging the guide hole 1821 with the guide protrusion, the movement of the second box 12 in the front-back direction can be further guided, improving the movement accuracy of the second box 12 and ensuring that the hydraulic energy-absorbing box 10 can effectively achieve collision energy absorption.

[0042] like Figure 2 and Figure 3As shown, the side plate 182 is a flat plate perpendicular to the left and right direction. A guide hole 1821 is formed on the side plate 182, which runs through the side plate 182 in the left and right direction. The guide hole 1821 extends into an elongated hole in the front and back direction and is rectangular in shape. A first fixing plate 16 is fixed on the rear end face of the second box 12. The first fixing plate 16 has guide protrusions 161 protruding towards the left and right sides at both ends in the left and right direction. The width of the guide protrusions 161 in the vertical direction is adapted to the width of the guide hole 1821 in the vertical direction. The guide protrusions 161 fit into the guide hole 1821. In the left and right direction, the guide protrusions 161 extend through the guide hole 1821 to the side of the side plate 182 away from the second box 12. One end of the return spring 15 is fixedly connected to the guide protrusions 161.

[0043] Specifically, when the second housing 12 is in the initial position, the guide protrusion 161 abuts against the front sidewall of the guide hole 1821; when the second housing 12 is in the energy-absorbing position, the guide protrusion 161 abuts against the rear sidewall of the guide hole 1821. Therefore, the guide hole 1821 and the guide protrusion 161 not only guide the second housing 12 but also limit its movement in the front-back direction, thus limiting the second housing 12 in both the initial and energy-absorbing positions. The structure is simple and the limiting is reliable.

[0044] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the fluid outlet 123 is formed on the upper surface of the end of the second housing 12 that extends into the first cavity 111. The first one-way valve 13 includes: a first housing 131, a first valve core 132, and a first elastic member 133. The first housing 131 has a first inlet 1311 and a first outlet 1312. The first inlet 1311 is formed at the bottom of the first housing 131 and is directly opposite the fluid outlet 123 in the vertical direction. The first outlet 1312 is located on one side of the first housing 131 in the front-rear direction. The first valve core 132 is movably disposed in the first housing 131 in the vertical direction through the first elastic member 133, and the first valve core 132 is configured to block the first inlet 1311 under the action of gravity.

[0045] In some examples, such as Figure 2 As shown, the rear end of the second housing 12 extends into the first housing 11. A fluid outlet 123 is formed on the top wall of the rear end of the second housing 12 and extends through the top wall of the second housing 12 in the vertical direction. The rear end of the fluid outlet 123 is flush with the rear side wall of the second cavity 121 of the second housing 12. A first check valve 13 is disposed in the first cavity 111. The first check valve 13 is arranged on the outside of the second housing 12 and fixed to the second housing 12. The first check valve 13 seals the fluid outlet 123.

[0046] like Figure 4 As shown, the first one-way valve 13 includes a first housing 131, a first valve core 132, and a first elastic member 133. The first housing 131 defines a first valve cavity and has a first inlet 1311 and a first outlet 1312 communicating with the first valve cavity. The first inlet 1311 penetrates the bottom wall of the first housing 131 in the vertical direction and is arranged opposite to the fluid outlet 123 in the vertical direction. The first outlet 1312 penetrates the rear side wall of the first housing 131 in the front-rear direction and communicates with the first cavity 111. The first valve core 132 is movably disposed in the first housing 131 in the vertical direction. The first elastic member 133 is disposed on the upper side of the first valve core 132 and connected between the first valve core 132 and the top wall of the first valve cavity. The first elastic member 133 can undergo elastic deformation in the vertical direction.

[0047] The first valve core 132 is movable vertically between a first open position and a first closed position. In the first closed position, the first valve core 132 blocks the first inlet 1311 under the action of gravity. In the first open position, the first valve core 132 moves upward so that the first inlet 1311 and the first outlet 1312 are connected through the first valve chamber. At this time, the fluid in the second chamber 121 can enter the first chamber 111 through the fluid outlet 123, the first inlet 1311, the first valve chamber, and the first outlet 1312.

[0048] It should be noted that when the first valve core 132 is in the first closed position, the first elastic element 133 can be in its initial uncompressed natural state. At this time, the first valve core 132 only blocks the first inlet 1311 by gravity, and the fluid in the second chamber 121 only needs to overcome the gravity of the first valve core 132 to push the first valve core 132 upward. When the first valve core 132 is in the first closed position, the first elastic element 133 can also be in its initial compressed state. At this time, the first valve core 132 not only blocks the first inlet 1311 by gravity, but the elastic force of the first elastic element 133 also acts on the first valve core 132, causing the first valve core 132 to block the first inlet 1311. When the pressure of the fluid in the second chamber 121 increases, if the first check valve 13 is to be opened, the pressure of the fluid in the second chamber 121 must overcome not only the gravity of the first valve core 132, but also the pre-compressed elastic force of the first elastic element 133 in order to push the first valve core 132 upward and open the first inlet 1311.

[0049] In this embodiment, when the pressure of the fluid in the second chamber 121 increases and exceeds the weight of the first valve core 132, the fluid can push the first valve core 132 upward from the first closed position to move towards the first open position. Simultaneously, the first valve core 132 pushes the first elastic element 133 to deform. When the first valve core 132 moves upward to the first open position, the first inlet 1311 and the first outlet 1312 are connected. As the fluid in the second chamber 121 flows into the first chamber 111, the pressure of the fluid in the second chamber 121 decreases. When the pressure of the fluid in the second chamber 121 is insufficient to support the first valve core 132, the first valve core 132 moves downward, returning to the first closed position. At this time, the first chamber 111 and the second chamber 121 are no longer connected.

[0050] In the above scheme, the first valve core 132 of the first check valve 13 can close the first inlet 1311 by gravity. When the fluid pressure in the second chamber 121 overcomes the gravity of the first valve core 132, the first inlet 1311 can be opened. The structure is simple and easy to assemble. The opening and closing of the first check valve 13 is convenient, which is conducive to realizing pressure relief and energy absorption, and the response speed is fast.

[0051] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the first elastic element 133 is a sponge element, which simplifies the structure of the first elastic element 133 and reduces costs. Furthermore, by adjusting the density of the sponge element, the opening speed and opening force of the first one-way valve 13 can be adjusted, thereby adjusting the energy absorption coefficient.

[0052] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the lower end face of the first valve core 132 is an inclined surface that extends upward and toward the first outlet 1312; thus, the lower end face of the first valve core 132 can guide the fluid flowing from the fluid outlet 123 into the first inlet 1311 to the first outlet 1312, ensuring that the fluid in the second chamber 121 can flow smoothly through the first one-way valve 13 into the first chamber 111, ensuring the timeliness and effectiveness of energy absorption.

[0053] In some embodiments of this utility model, such as Figure 2 and Figure 5As shown, the fluid inlet 122 is formed on the lower surface of the end of the second housing 12 that extends into the first cavity 111. The second one-way valve 14 includes: a second housing 141, a second valve core 142, and a second elastic member 143. The second housing 141 has a second inlet 1411 and a second outlet 1412. The second inlet 1411 is formed on one side of the first housing 131 in the front-rear direction. The second outlet 1412 is located at the top of the second housing 141 and is directly opposite the fluid inlet 122 in the vertical direction. The second valve core 142 is movably disposed in the second housing 141 in the front-rear direction by means of the second elastic member 143, and the second elastic member 143 always pushes the second valve core 142 to block the second inlet 1411.

[0054] In some examples, such as Figure 2 As shown, a fluid inlet 122 is formed on the bottom wall of the rear end of the second housing 12 and extends through the bottom wall of the second housing 12 in the vertical direction. The rear end of the fluid inlet 122 is flush with the rear side wall of the second cavity 121 of the second housing 12. A second one-way valve 14 is disposed in the first cavity 111. The second one-way valve 14 is arranged on the outside of the second housing 12 and fixed to the second housing 12. The second one-way valve 14 seals the fluid inlet 122.

[0055] The second one-way valve 14 includes a second housing 141, a second valve core 142, and a second elastic member 143. The second housing 141 defines a second valve cavity and has a second inlet 1411 and a second outlet 1412 communicating with the second valve cavity. The second outlet 1412 penetrates the top wall of the second housing 141 in the vertical direction and is directly opposite and communicates with the fluid inlet 122 in the vertical direction. The second inlet 1411 penetrates the rear side wall of the second housing 141 in the front-rear direction and communicates with the first cavity 111. The second valve core 142 is movably disposed within the second housing 141 in the front-rear direction. The second elastic member 143 is arranged on the front side of the second valve core 142 and connected between the second valve core 142 and the front side wall of the second valve cavity. The second elastic member 143 can undergo elastic deformation in the front-rear direction.

[0056] The second valve core 142 is movable in the left-right direction between the second open position and the second closed position. In the second closed position, the second valve core 142 blocks the second inlet 1411. In the second open position, the second valve core 142 moves forward so that the second inlet 1411 and the second outlet 1412 are connected through the second valve chamber. At this time, the fluid in the first chamber 111 can enter the second chamber 121 through the second inlet 1411, the second valve chamber, the second outlet 1412, and the fluid inlet 122.

[0057] It should be noted that when the second valve core 142 is in the second closed position, the second elastic element 143 can be in an initial compressed state. At this time, the second valve core 142 is blocked in the second inlet 1411 under the action of the pre-compression elastic force of the first elastic element 133. Only when the pressure of the fluid in the first chamber 111 increases, and the pressure of the fluid in the second chamber 121 can overcome the pre-compression elastic force of the second elastic element 143 and continue to push and compress the second elastic element 143, can the second valve core 142 be pushed forward to open the second inlet 1411.

[0058] In this embodiment, the second check valve 14, when the pressure of the fluid in the first chamber 111 increases and exceeds the pre-compression elastic force of the second elastic member 143, allows the fluid to push the second valve core 142 forward from the second closed position toward the second open position. Simultaneously, the second valve core 142 continues to deform the second elastic member 143. When the second valve core 142 moves forward to the second open position, the second inlet 1411 and the second outlet 1412 are connected. As the fluid in the first chamber 111 flows into the second chamber 121, the pressure of the fluid in the second chamber 121 decreases. When the pressure of the fluid in the first chamber 111 is insufficient to overcome the elastic force of the second elastic member 143, the second elastic member 143 pushes the second valve core 142 backward, returning it to the second closed position. At this time, the first chamber 111 and the second chamber 121 are no longer connected.

[0059] In the above scheme, the second valve core 142 of the second check valve 14 can close the second inlet 1411 by the elastic force of the second elastic element 143. When the fluid pressure in the first chamber 111 can overcome the elastic force of the second elastic element 143, the second inlet 1411 can be opened. The structure is simple and easy to assemble. The opening and closing of the second check valve 14 is convenient, which is conducive to the reset of the hydraulic energy absorption box 10 and the response speed is fast.

[0060] In some embodiments of this utility model, such as Figure 2 and Figure 5 As shown, the second elastic element 143 is a sponge element, which simplifies the structure of the second elastic element 143 and reduces costs. Furthermore, by adjusting the sponge density of the second elastic element 143, the opening speed and opening force of the second one-way valve 14 can be adjusted, thereby achieving adjustment of the reset response speed.

[0061] In some embodiments of this utility model, such as Figure 2 and Figure 5As shown, the upper surface of the second valve core 142 is an inclined surface extending upwards and in a direction away from the second inlet 1411. Therefore, the upper surface of the second valve core 142 can guide the fluid entering the second inlet 1411 from the first chamber 111 to the second outlet 1412, ensuring that the fluid in the first chamber 111 can flow smoothly through the second check valve 14 to the second chamber 121, and ensuring that the hydraulic energy-absorbing box 10 can be effectively and smoothly reset.

[0062] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the hydraulic energy-absorbing box 10 may further include: a first mounting plate 191, which is fixed to the side of the first box body 11 away from the second box body 12 in the front-rear direction. Furthermore, the first mounting plate 191 is used to connect to the vehicle body.

[0063] Specifically, such as Figure 11 As shown, the first mounting plate 191 is a flat plate perpendicular to the front-rear direction. A through hole is formed in the middle of the first mounting plate 191, extending through the first mounting plate 191 in the front-rear direction. The through hole is directly opposite the first housing 11 in the front-rear direction, and the periphery of the first housing 11 is connected to the periphery of the through hole. Furthermore, a reinforcing ring 1911 is formed on the first mounting plate 191. The reinforcing ring 1911 extends in a ring shape along the circumference of the through hole. The reinforcing ring 1911 is a raised rib shape arranged on the surface of the first mounting plate 191 facing the first housing 11. For example, the reinforcing ring 1911 can be formed by bending the periphery of the through hole towards the first housing 11. Therefore, by providing the reinforcing ring 1911, the structural strength of the periphery of the through hole can be improved, the structural strength of the first mounting plate 191 can be improved, and the reliability of the hydraulic energy-absorbing box 10 connected to the vehicle body via the first mounting plate 191 can be improved.

[0064] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the hydraulic energy-absorbing box 10 may further include: a second mounting plate 192, which is connected to the end of the second box body 12 away from the first box body 11 in the front-back direction. Specifically, the second mounting plate 192 is a plate shape that is vertically arranged and extends to the left and right. The second mounting plate 192 and the second box body 12 can be welded together.

[0065] In some embodiments of this utility model, such as Figure 2 and Figure 3As shown, the hydraulic energy-absorbing box 10 may further include a connecting plate 193, which is disposed between the second mounting plate 192 and the second box body 12. The second box body 12 is connected to the second mounting plate 192 via the connecting plate 193. Further, the connecting plate 193 is formed as a box shape with an open front side, the rear end face of the connecting plate 193 is connected to the front end face of the second box body 12, and the second mounting plate 192 covers the front side of the connecting plate 193 and is fixedly connected to the connecting plate 193.

[0066] like Figures 6-12 As shown, the anti-collision beam assembly 100 according to the second aspect embodiment of the present utility model includes an anti-collision beam 20 and a hydraulic energy-absorbing box 10 as described in the first aspect embodiment. There are two hydraulic energy-absorbing boxes 10, which are respectively connected to both ends of the anti-collision beam 20.

[0067] According to the present utility model, the anti-collision beam assembly 100 improves the overall performance of the anti-collision beam assembly 100 by providing the hydraulic energy-absorbing box 10 of the first aspect embodiment described above.

[0068] In some embodiments, such as Figure 6 and Figure 7 As shown, the anti-collision beam 20 extends to the left and right. In the direction from the left and right ends toward the middle, the anti-collision beam 20 extends along a forward-convex arc. Two hydraulic energy-absorbing boxes 10 are arranged on the rear side of the anti-collision beam 20, and the front ends of the two hydraulic energy-absorbing boxes 10 are respectively connected to the rear surface of the left and right ends of the anti-collision beam 20.

[0069] like Figure 12 As shown, the anti-collision beam 20 is a U-shaped beam opening towards the rear. The anti-collision beam 20 includes a main body and flanges connecting the upper and lower sides of the main body. The main body is vertically oriented and extends in the left-right direction. There are two flanges, each connected to one of the upper and lower edges of the main body and extending rearward. A portion of the rear surface of the left and right ends of the main body forms a mounting surface 21. The mounting surface 21 is a vertically oriented plane extending left and right. In the direction from the left and right ends towards the middle of the anti-collision beam 20, the mounting surface 21 extends obliquely towards the front. The mounting surface 21 is attached to and connected to the front end of the hydraulic energy-absorbing box 10. For example, the mounting surface 21 can be attached to and fixedly connected to the second mounting plate 192. Furthermore, the two mounting surfaces 21 on the left and right sides are symmetrically arranged in the left-right direction. The hydraulic energy-absorbing boxes 10 on the left and right sides are symmetrically arranged in the left-right direction, and / or, the hydraulic energy-absorbing boxes 10 on the left and right sides are rotationally symmetrically arranged about the centerline of the vehicle in the front-rear direction.

[0070] In some embodiments of this utility model, such as Figures 8-10As shown, a trailer hitch hole is formed on the anti-collision beam 20, extending through the anti-collision beam 20 in the front-to-back direction. The trailer hitch hole is formed at one end of the anti-collision beam 20 in the left-to-right direction. The anti-collision beam assembly 100 also includes a trailer hook threaded tube 30 and a trailer hook reinforcing plate 40. The trailer hook threaded tube 30 extends in a tubular shape in the front-to-back direction and passes through and is fixed in the trailer hitch hole. The trailer hook reinforcing plate 40 is arranged on the rear side of the anti-collision beam 20 and is fixedly connected to the anti-collision beam 20. The rear end of the trailer hook threaded tube 30 is fixedly connected to the trailer hook reinforcing plate 40.

[0071] The assembly process of the anti-collision beam assembly 100 in this embodiment is described in detail below.

[0072] The anti-collision beam assembly 100 includes: an anti-collision beam 20, two hydraulic energy-absorbing boxes 10, a trailer hook threaded pipe 30, and a trailer hook reinforcing plate 40. The two hydraulic energy-absorbing boxes 10 are self-symmetrical; the hydraulic energy-absorbing box 10 on the left can be rotated 180° to obtain the hydraulic energy-absorbing box 10 on the right. The hydraulic energy-absorbing box 10 includes a first box body 11, a second box body 12, a first mounting plate 191, a second mounting plate 192, and a connecting plate 193. The first mounting plate 191, the first box body 11, the second box body 12, the connecting plate 193, and the second mounting plate 192 are arranged sequentially from back to front and are connected in sequence.

[0073] The rear end of the first housing 11 of the left hydraulic energy-absorbing box 10 is connected to the first mounting plate 191 on the left side of the anti-collision beam 20, and welded using MIG welding to obtain the left hydraulic energy-absorbing box sub-assembly. Similarly, the rear end of the first housing 11 of the right hydraulic energy-absorbing box 10 is connected to the first mounting plate 191 on the right side of the anti-collision beam 20, and welded using MIG welding to obtain the right hydraulic energy-absorbing box sub-assembly. The anti-collision beam 20 is welded to the trailer hook threaded pipe 30 and the trailer hook reinforcing plate 40 using MIG welding to form the anti-collision beam body trailer hook sub-assembly. The left hydraulic energy-absorbing box sub-assembly, the right hydraulic energy-absorbing box sub-assembly, and the anti-collision beam body trailer hook sub-assembly are welded to form the anti-collision beam assembly 100.

[0074] The anti-collision beam 20 has mounting surfaces 21 at both ends. The mounting surfaces 21 are flat and can be welded to the front end of the hydraulic energy-absorbing box 10. This can improve the load-bearing capacity between the mounting surfaces 21 of the anti-collision beam 20 and the hydraulic energy-absorbing box 10, improve the connection reliability, and reduce maintenance costs.

[0075] The collision energy absorption process of the anti-collision beam assembly 100 implemented in this utility model is described in detail below.

[0076] When a vehicle collision occurs, the force is transmitted sequentially through the anti-collision beam 20, the second mounting plate 192, and the connecting plate 193 to the second housing 12, compressing the second housing 12 and creating high pressure in the liquid inside. The liquid flows through the fluid outlet 123 to the first inlet 1311 of the first one-way valve 13, colliding with the first valve core 132 of the first one-way valve 13, compressing the first valve core 132 and causing it to move upward. The first valve core 132 pushes and compresses the first elastic element 133, connecting the first inlet 1311 and the first outlet 1312. The fluid then enters the first cavity 111 of the first housing 11 through the first outlet 1312, thereby absorbing the collision energy. The first elastic element 133 is a sponge; the energy absorption coefficient can be adjusted by changing the density of the compressed sponge. After the collision ends, the squeezing force on the second box 12 disappears, and the first valve core 132 of the first one-way valve 13 returns to the first closed position by its own weight and the squeezing force of the first elastic element 133 to restore its deformation, thus closing the first inlet 1311 of the first one-way valve 13 and completing the collision energy absorption action.

[0077] After the collision, the two return springs 15 pull the first fixed plate 16 forward, causing the first fixed plate 16 to return to its original position. At this time, the liquid in the first cavity 111 of the first box 11 and the liquid in the second cavity 121 of the second box 12 will generate a pressure difference. The liquid in the first cavity 111 will squeeze the second valve core 142 of the second one-way valve 14 at the second inlet 1411 of the second one-way valve 14, and cause the second valve core 142 to move forward of the vehicle, so that the second inlet 1411 and the second outlet 1412 are connected. The liquid will return to the second cavity 121 of the second box 12 through the fluid inlet 122 until the guide protrusion 161 on the first fixed plate 16 is in contact with the front side wall of the guide hole 1821 on the side plate 182, and the hydraulic energy absorption box 10 returns to its original position.

[0078] In this embodiment of the utility model, the anti-collision beam assembly 100, during a collision, causes the second box 12 of the hydraulic energy-absorbing box 10 to compress the first box 11 of the hydraulic energy-absorbing box 10, resulting in relative displacement between the second box 12 and the first box 11. This relative displacement absorbs energy, effectively reducing the impact force on the vehicle's longitudinal beams. When the collision force on the hydraulic energy-absorbing box 10 is within its bearing capacity, the hydraulic energy-absorbing box 10 can naturally recover after the collision, and the anti-collision beam 20 will not be damaged during the collision. Only when the collision force exceeds the bearing capacity of the hydraulic energy-absorbing box 10 will the force on the anti-collision beam 20 be transmitted rearward to the vehicle's longitudinal beams.

[0079] A vehicle according to a third aspect of the present invention includes a crash beam 20 and a crash beam assembly 100 according to the first aspect of the present invention described above.

[0080] The vehicle according to the present utility model improves the overall performance of the vehicle by providing the anti-collision beam assembly 100 of the first aspect embodiment described above.

[0081] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A hydraulic energy-absorbing box, characterized in that, include: A first box body, the inner side of which defines a first cavity; The second box is arranged in the front-back direction with the first box, and one end of the second box extends into the first cavity. The second box is movable relative to the first box in the front-back direction between an initial position and an energy-absorbing position. The second box defines a second cavity, which is filled with fluid. The second box is provided with a fluid inlet and a fluid outlet connecting the first cavity and the second cavity. A first check valve is located at the fluid outlet and is configured to allow fluid to flow unidirectionally from the second chamber toward the first chamber. A second check valve is located at the fluid inlet and is configured to allow fluid to flow unidirectionally from the first chamber toward the second chamber. A return spring is connected between the first housing and the second housing and is configured to always drive the second housing toward the initial position.

2. The hydraulic energy-absorbing box according to claim 1, characterized in that, The number of reset springs is multiple, and the multiple reset springs are arranged at intervals around the second housing.

3. The hydraulic energy-absorbing box according to claim 2, characterized in that, Also includes: A first fixing plate and a second fixing plate are provided. The first fixing plate is fixed to one end of the second box body that extends into the first cavity. The second fixing plate is fixed to the first cavity in the front-back direction toward the inner wall of the second box body. In the front-back direction, the two ends of the reset spring are fixedly connected to the first fixing plate and the second fixing plate, respectively.

4. The hydraulic energy-absorbing box according to any one of claims 1-3, characterized in that, Also includes: A guide frame is disposed within the first housing and defines a guide channel extending in a front-rear direction. One end of the second housing is slidably fitted within the guide channel.

5. The hydraulic energy-absorbing box according to claim 4, characterized in that, The guide frame includes two side plates extending in a front-back direction and spaced apart in a first direction. Each of the two side plates has two limiting plates extending in a front-back direction and spaced apart in a second direction on its opposite side surface. The two side plates and the four limiting plates cooperate to enclose the guide channel. The first direction, the second direction, and the front-back direction are perpendicular to each other.

6. The hydraulic energy-absorbing box according to claim 5, characterized in that, The side plate is provided with a guide hole that passes through the side plate in the first direction. The guide hole extends in the front-back direction. The end of the second box body that extends into the first cavity is provided with a first fixing plate. The first fixing plate is provided with a guide protrusion. The guide protrusion is slidably engaged in the guide hole.

7. The hydraulic energy-absorbing box according to any one of claims 1-3, characterized in that, The fluid outlet is formed on the upper surface of one end of the second housing that extends into the first cavity. The first one-way valve includes: a first housing, a first valve core, and a first elastic element. The first housing has a first inlet and a first outlet. The first inlet is formed at the bottom of the first housing and is directly opposite the fluid outlet in the vertical direction. The first outlet is located on one side of the first housing in the front-rear direction. The first valve core is movably disposed in the first housing in the vertical direction through the first elastic element, and the first valve core is configured to block the first inlet under the action of gravity. The fluid inlet is formed on the lower surface of one end of the second housing that extends into the first cavity. The second one-way valve includes a second housing, a second valve core, and a second elastic member. The second housing has a second inlet and a second outlet. The second inlet is formed on one side of the first housing in the front-rear direction. The second outlet is located at the top of the second housing and is directly opposite the fluid inlet in the vertical direction. The second valve core is movably disposed in the second housing in the front-rear direction through the second elastic member, and the second elastic member always pushes the second valve core to block the second inlet.

8. The hydraulic energy-absorbing box according to claim 7, characterized in that, The first elastic element is a sponge element, and / or the lower end face of the first valve core is an inclined surface that extends upward and toward the first outlet; The second elastic element is a sponge element, and / or the upper surface of the second valve core is an inclined surface that extends upward and in a direction away from the second inlet.

9. A crash beam assembly, characterized in that, It includes a crash beam and a hydraulic energy-absorbing box according to any one of claims 1-8, wherein there are two hydraulic energy-absorbing boxes, which are respectively connected to both ends of the crash beam.

10. A vehicle, characterized in that, Includes the anti-collision beam assembly according to claim 9.

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