Anti-collision buffer of new energy motor home

Abstract

The invention relates to the technical field of new energy automobile safety protection, discloses an anti-collision buffer of a new energy motor home, and aims to solve the problem that a traditional buffer device is difficult to effectively disperse multi-directional impact energy, so that the damage risk of a battery pack is high. The tail end of a hydraulic piston rod in the multidirectional buffer is rotationally connected with an arc surface contact disc through a spherical joint, and the arc surface contact disc is in rolling connection with a plane contact disc fixed to the buffer connecting frame. More than two groups of multidirectional buffers can be arranged between the buffer beam and the buffer connecting frame, and pressure adjusting discs and energy absorbing springs are arranged on the outer sides of the hydraulic damping buffers. According to the design, the impact force in any direction is converted into axial movement through the rolling connection structure, and the hydraulic damping and the energy absorption spring are combined to absorb energy synergistically, so that multi-directional impact energy is effectively dispersed, mechanical damage is avoided, and the safety protection performance of the battery pack is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of safety protection of new energy vehicles, and in particular to an anti-collision buffer for a new energy recreational vehicle. Background Art

[0002] New energy vehicles face multiple collision risks during driving, especially large vehicles such as RVs, and the safety protection of their battery packs is particularly important.

[0003] Traditional anti-collision buffers have obvious technical flaws: First, conventional buffers can only handle impact forces in a single direction. When the vehicle is hit by an oblique or side impact, the buffering effect is significantly reduced. Second, traditional buffers have difficulty effectively dispersing impact energy from different angles, resulting in excessive local stress on the battery pack. More seriously, when the battery pack is subjected to non-axial impact, the traditional buffer may completely fail and fail to provide effective protection for the battery pack. These technical flaws not only increase the risk of damage to the battery pack, but may also cause serious safety accidents such as battery thermal runaway. In order to address the above problems, existing technologies urgently need to be improved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the traditional buffer device in the prior art has the disadvantage that it is difficult to effectively disperse the impact energy from different angles. For this reason, we propose an anti-collision buffer for new energy RVs.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: a collision avoidance buffer for a new energy RV, comprising a buffer beam, a buffer connecting frame and a multi-directional buffer, the buffer beam being fixedly mounted on the chassis of the RV by bolts, the buffer connecting frame being fixedly mounted on the battery pack of the new energy RV by bolts, and the multi-directional buffer being fixedly connected between the buffer beam and the buffer connecting frame by bolts; the multi-directional buffer comprising a hydraulic damping buffer, a hydraulic piston rod being arranged in the hydraulic damping buffer, the end of the hydraulic piston rod being rotatably connected to an arc-surface contact plate, a flat contact plate being fixedly connected to the buffer connecting frame by bolts, and the arc-surface contact plate being rollingly connected to the flat contact plate.

[0006] Preferably, the front and rear of the battery pack are both provided with a buffer beam, a buffer connecting frame and a multi-directional buffer.

[0007] Preferably, two or more groups of multi-directional buffers are provided between the buffer beam and the buffer connecting frame.

[0008] Preferably, a pressure regulating disk is fixedly connected to the outside of the hydraulic damping buffer via threads, a spring baffle is fixedly connected to the hydraulic piston rod, and an energy absorbing spring is provided on the outer jacket of the hydraulic damping buffer, which is arranged between the pressure regulating disk and the spring baffle.

[0009] Preferably, a spherical joint is provided between the hydraulic piston rod and the arcuate contact disk, and the arcuate contact disk is rotatably connected to the hydraulic piston rod via the spherical joint.

[0010] Preferably, the cross section of the arcuate contact disc is half an ellipse, and the distance from the spherical joint to the center of the contact surface between the arcuate contact disc and the plane contact disc is smaller than the distance from the spherical joint to any point on the contact surface between the arcuate contact disc and the plane contact disc.

[0011] Preferably, a movable disk is provided on one side of the planar contact disk, a connecting wire rope is fixedly connected to the center of the movable disk, a wire rope through hole is opened in the center of the planar contact disk, the connecting wire rope passes through the wire rope through hole, and a connecting head is fixedly connected to the end of the connecting wire rope, the connecting head is fixedly connected to the arc contact disk by threads, and an anti-detachment spring is provided between the planar contact disk and the movable disk.

[0012] Preferably, both ends of the wire rope through hole are processed with arc chamfers.

[0013] Preferably, annular arc surface teeth are processed on the arc surface contact disc, and annular flat surface teeth are processed on the flat surface contact disc, and the annular arc surface teeth and the annular flat surface teeth are meshed with each other.

[0014] Preferably, the contact surfaces of the arc-surface contact disk and the flat contact disk are both inlaid with anti-slip diamond particles.

[0015] The technical effects and advantages of the present invention are as follows: In the present invention, through the synergistic effect of the buffer beam, the buffer connecting frame and the multi-directional buffer, combined with the rolling connection structure of the arc contact plate and the flat contact plate, the impact energy from different directions can be effectively dispersed, and the mechanical damage caused by the traditional buffer device when subjected to multi-directional impact can be avoided, which significantly improves the safety protection performance of the battery pack. It has the advantages of effectively dispersing multi-directional impact energy, avoiding mechanical damage, and improving the safety protection performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components: Figure 1 This is a schematic diagram of the appearance structure of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 It is a schematic structural diagram of the buffer beam, buffer connecting frame and multi-directional buffer of the present invention; Figure 4 It is a schematic diagram of the structure of the multi-directional buffer of the present invention; Figure 5 It is a schematic cross-sectional view of the multi-directional buffer structure of the present invention; Figure 6 For the present invention Figure 5 A in the middle is an enlarged structural diagram; Figure 7 This is a schematic diagram of the structure of the arc surface contact disk of the present invention; Figure 8 It is a schematic diagram of the planar contact disk structure of the present invention.

[0017] Legend: 1. Buffer beam; 2. Buffer connecting frame; 3. Multi-directional buffer; 4. Hydraulic damping buffer; 5. Hydraulic piston rod; 6. Pressure regulating plate; 7. Spring baffle; 8. Energy-absorbing spring; 9. Spherical joint; 10. Arc contact plate; 1001. Annular arc teeth; 11. Flat contact plate; 1101. Annular flat teeth; 1102. Wire rope through hole; 12. Movable plate; 13. Connecting wire rope; 1301. Connecting head; 14. Anti-slip spring. DETAILED DESCRIPTION

[0018] The technical solutions of this application will be described clearly and completely below, in conjunction with the accompanying drawings. It should be understood that the described embodiments represent only some, and not all, of the embodiments of this application. The components of this application, generally described and illustrated in the drawings herein, may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of this application, but rather merely represents selected embodiments of this application. All other embodiments derived by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In existing technology, new energy vehicle battery pack anti-collision buffers generally use a unidirectional buffer structure. This type of device can effectively absorb energy in frontal impacts, but has significant limitations when facing lateral or oblique impacts. The sliding contact surface within traditional buffers is prone to directional deviation, causing seizure or wear. When the vehicle encounters complex collision conditions, the oblique impact force cannot be effectively converted into axial movement of the buffer structure, resulting in a significant reduction in buffering efficiency. In severe cases, it may cause deformation of the battery pack structure and even the risk of thermal runaway.

[0020] To address this issue, researchers noted that the variability of collision direction is a key factor affecting cushioning effectiveness. Analyzing the dynamics of vehicle collisions, they found that the angle between the impact force direction and the buffer axis directly affects energy conversion efficiency. Based on this, the design team proposed transforming the rigid connection into a movable contact, attempting to alter the force transmission path through the geometric properties of the contact surface. After multiple tests, they determined that rolling contact, instead of traditional rigid contact, eliminates directional constraints while achieving effective cushioning.

[0021] Therefore, this application proposes a crash buffer for a new energy RV, comprising a buffer beam 1, a buffer connecting frame 2, and a multi-directional buffer 3. The buffer beam 1 is bolted to the RV chassis, the buffer connecting frame 2 is bolted to the battery pack, and the multi-directional buffer 3 is connected between the two. The multi-directional buffer 3 includes a hydraulic damping buffer 4, the end of which is a hydraulic piston rod 5 that rotates and connects to a curved contact plate 10. A flat contact plate 11 is fixed to the buffer connecting frame 2, forming a rolling connection structure between the two contact plates.

[0022] Among them, the buffer beam 1 refers to a rigid support component that bears the impact load. Specifically, it can be forged from high-strength alloy steel and is used to transfer the collision energy to the buffer structure. The buffer connecting frame 2 refers to a transition component that connects the battery pack and the buffer device. Specifically, it can adopt a welded frame structure to ensure the stability of the energy transfer path. The multi-directional buffer 3 refers to a buffer component with a multi-degree-of-freedom adjustment function. Specifically, it can adopt a composite structure of hydraulic damping and mechanical linkage to achieve the conversion of impact forces in different directions. The hydraulic damping buffer 4 is a conventional existing technology that generates a damping effect through liquid flow. Specifically, it can adopt a double-chamber hydraulic cylinder structure to achieve damping force control by adjusting the oil circuit. The arc contact disk 10 is a rotating component with a specific curvature. Specifically, it can adopt a surface-hardened alloy disk body, and its arc curvature radius is determined by dynamic calculations. The flat contact disk 11 refers to a rigid platform that cooperates with the arc component. Specifically, it can adopt a surface-ground steel plate to ensure the stability of the rolling contact.

[0023] Specifically, when the vehicle encounters a collision, a relative displacement occurs between the chassis and the battery pack, and the multi-directional buffer 3 starts to work. The impact force is transmitted to the hydraulic damping buffer 4 through the buffer beam 1, pushing the hydraulic piston rod 5 to produce axial movement. The arc contact plate 10 and the flat contact plate 11 are in rolling contact after being subjected to force. Due to the geometric characteristics of the arc surface, the impact forces in different directions are converted into axial movement of the hydraulic piston rod 5. The hydraulic damping buffer 4 consumes kinetic energy through the throttling effect of the liquid, while the energy-absorbing spring 8 assists in absorbing residual energy. The rolling motion of the contact surface eliminates directional restrictions, so that the oblique impact force can be effectively converted into axial movement of the buffer structure.

[0024] Compared to existing technologies, traditional shock absorbers are limited to a unidirectional buffering mode, making them prone to buffering failure under complex collision conditions. This solution overcomes this directional limitation through a rolling contact structure. The contact surface geometry ensures effective conversion of impact forces from all angles. The combined structure of hydraulic damping and mechanical linkage significantly improves the device's durability while maintaining buffering effectiveness.

[0025] Through the above technical solution, this application can convert impact forces in any direction within a 180-degree range into axial movement of the buffer structure, effectively protecting the battery pack from multi-directional impact damage. The rolling contact design avoids the abnormal wear caused by traditional sliding friction, extending the service life of the device. The composite buffer structure ensures energy absorption efficiency while maintaining structural stability after the vehicle collision.

[0026] The present application further proposes that a buffer beam 1, a buffer connecting frame 2 and a multi-directional buffer 3 are provided at the front and rear of the battery pack.

[0027] The buffer beam 1 is a lateral support structure bolted to the RV chassis. It can be cast from high-strength alloy steel and is used to disperse and transmit impact loads. The buffer connecting frame 2 is a frame structure bolted to the battery pack. It can be welded and formed into a steel structure and is used to establish a connection path between the battery pack and the buffer beam 1. The multi-directional buffer 3 is an energy absorption device bolted between the buffer beam 1 and the buffer connecting frame 2. It can be a composite structure of a hydraulic damper and spring, and is used to convert impact forces in different directions into axial buffering stroke.

[0028] Specifically, when the front or rear of the battery pack is hit, the buffer beam 1 set in the corresponding direction transmits the impact force to the buffer connecting frame 2 through the multi-directional buffer 3. The hydraulic piston rod 5 inside the hydraulic damping buffer 4 produces axial displacement under the action of pressure, and the energy-absorbing spring 8 is synchronously compressed to absorb kinetic energy. The arc contact disc 10 and the flat contact disc 11 are in rolling contact under the action of the impact force, and through their special geometric shape, the oblique impact is converted into axial movement of the hydraulic piston rod 5. The multi-directional buffer 3 can only achieve impact force buffering within a range of 180 degrees. The buffer system set in both directions in the front and rear of the battery pack forms a 360-degree protective structure, ensuring that the buffer mechanism can be triggered when the vehicle collides in any direction.

[0029] Compared to existing technologies, traditional anti-collision structures only have a buffer device on one side of the battery pack, which provides ineffective protection in reverse collisions. This solution symmetrically arranges the buffer system in front and behind the battery pack, ensuring protection in both the forward and reverse directions of the vehicle, eliminating the blind spots associated with single-sided protection. This bidirectional buffer structure can handle collisions under different driving conditions, preventing protection failure due to changes in impact direction.

[0030] Through the above technical solution, this application effectively solves the problem of insufficient one-sided protection for the battery pack during forward or reverse collisions. The bidirectionally symmetrical buffer system provides redundant protection, ensuring that the multi-directional buffer mechanism is triggered in collisions in any direction of travel, reducing the probability of structural deformation or internal short circuits in the battery pack due to single-point impact, and improving the collision safety of the power battery system.

[0031] The present application further proposes that two or more groups of multi-directional buffers 3 are provided between the buffer beam 1 and the buffer connecting frame 2 .

[0032] The two or more sets of multi-directional buffers 3 refer to multiple independent buffer units symmetrically arranged along the length of the buffer beam 1. Specifically, three or four buffers can be arranged in a triangular or rectangular pattern, with each buffer connected to the buffer beam 1 and the buffer connecting frame 2 via an independent mounting base. This arrangement allows impact forces in different directions to be collaboratively absorbed by the multiple buffers, preventing overload on a single buffer.

[0033] Specifically, when a vehicle experiences a non-vertical impact, the curved contact discs 10 and flat contact discs 11 of the multiple shock absorbers generate rolling contact at varying angles. For example, in a lateral collision, the curved contact disc 10 of the left shock absorber rolls clockwise, while the curved contact disc 10 of the right shock absorber rolls counterclockwise. Each set of shock absorbers breaks down the lateral impact force into its own radial buffering stroke. This multi-directional linkage mechanism evenly distributes the impact energy to the hydraulic damping system and energy-absorbing springs 8 of each shock absorber, preventing localized structural stress concentration.

[0034] Compared with the existing technology, the traditional single buffer structure is prone to piston rod deflection and jamming when subjected to oblique impact. However, this solution uses multiple buffers to work together, so that each buffer only needs to bear part of the load, reducing the movement amplitude of a single buffer and ensuring that the hydraulic piston rod 5 always moves smoothly along the axis.

[0035] Through the above technical solution, this application effectively solves the problem that the buffer is easily damaged under multi-angle impacts, extends the service life of the buffer system through the load distribution mechanism, and at the same time improves the all-round protection capability of the battery pack to prevent the risk of buffer failure caused by single-point overload.

[0036] The present application further proposes that the outer side of the hydraulic damping buffer 4 is fixedly connected to the pressure regulating disk 6 by threads, the spring baffle 7 is fixedly connected to the hydraulic piston rod 5, and an energy absorbing spring 8 is arranged outside the hydraulic damping buffer 4, and the energy absorbing spring 8 is arranged between the pressure regulating disk 6 and the spring baffle 7.

[0037] The pressure regulating disc 6 refers to an adjustable disc-shaped structure that is threadedly connected to the outside of the hydraulic damping buffer 4. Specifically, it can be implemented by using an annular metal disc with internal threads that cooperates with the external threads on the outer wall of the hydraulic damping buffer 4 to adjust the preload of the energy-absorbing spring 8. The spring stopper 7 refers to a limiting structure fixed to the hydraulic piston rod 5. Specifically, it can be a metal disc fixed by welding or bolts, which is used to limit the axial movement range of the energy-absorbing spring 8. The energy-absorbing spring 8 refers to an elastic element that is sleeved on the outside of the hydraulic damping buffer 4. Specifically, it can be a helical compression spring that absorbs impact energy through the compression deformation between the pressure regulating disc 6 and the spring stopper 7.

[0038] Specifically, when the impact force is transmitted to the hydraulic piston rod 5, the energy-absorbing spring 8 is compressed between the pressure-adjusting disc 6 and the spring retaining plate 7. Its deformation, combined with the hydraulic resistance within the hydraulic damping buffer 4, forms a multi-stage buffering mechanism. By rotating the pressure-adjusting disc 6 relative to the hydraulic damping buffer 4, the initial compression of the energy-absorbing spring 8 is adjusted, enabling dynamic adjustment of the buffering force. For example, to enhance buffering capacity, the pressure-adjusting disc 6 can be tightened toward the spring retaining plate 7 to increase the preload of the energy-absorbing spring 8; conversely, the preload can be reduced to accommodate different operating conditions.

[0039] Compared to existing technologies, traditional shock absorbers typically use springs with fixed parameters or a single hydraulic damping structure, which cannot be dynamically adjusted based on the actual impact direction and intensity. However, this solution, through the combination of a pressure adjustment disc 6 and an energy-absorbing spring 8, makes the stiffness and damping characteristics of the shock absorber system adjustable, while also avoiding shock absorber failure caused by insufficient spring preload or structural damage caused by excessive preload.

[0040] Through the above technical solution, the present application can flexibly adjust the buffering force according to the actual impact direction and impact energy, ensuring that the hydraulic damping buffer 4 and the energy-absorbing spring 8 can work together to effectively absorb multi-angle impact energy, and avoid overload damage to the internal components of the buffer due to improper spring preload, thereby improving the reliability and adaptability of the battery pack anti-collision system.

[0041] The present application further proposes that a spherical joint 9 is provided between the hydraulic piston rod 5 and the arcuate contact disc 10 , and the arcuate contact disc 10 is rotatably connected to the hydraulic piston rod 5 via the spherical joint 9 .

[0042] The spherical joint 9 is a connection structure that allows for multiple degrees of freedom of rotation between the hydraulic piston rod 5 and the arcuate contact disc 10. Specifically, this can be achieved using a metal ball joint structure, which includes a ball head and a ball seat assembly capable of withstanding axial and radial loads. The rotational connection allows the arcuate contact disc 10 to rotate at multiple angles around the center of the spherical joint 9. This can be achieved using bearings or sliding pairs made of low-friction materials, ensuring that the contact disc only rolls, not slides, when subjected to force.

[0043] Specifically, when an external impact force acts on the buffer connector 2, relative motion occurs between the flat contact disc 11 and the arcuate contact disc 10. Because the arcuate contact disc 10 is connected to the hydraulic piston rod 5 via the spherical joint 9, if the direction of the impact force deviates from the axis of the hydraulic piston rod 5, the arcuate contact disc 10 can rotate around the center of the spherical joint 9, driving the hydraulic piston rod 5 along its axis. During this process, the rolling contact of the arcuate contact disc 10 forces the hydraulic damping buffer 4 to absorb the impact energy. At the same time, the rotational freedom of the spherical joint 9 prevents mechanical seizure or localized stress concentration caused by impact angle deviation.

[0044] Compared to existing technologies, conventional shock absorbers typically utilize fixed hinges or single planar bearings for connection, allowing only limited rotation. This can easily lead to structural damage when the impact direction is at a large angle to the shock absorber axis. However, this solution, through the introduction of a spherical joint 9, enables the arc-surface contact plate 10 to adaptively adjust its angle in three dimensions, significantly improving the shock absorber's adaptability to impacts from complex directions.

[0045] Through the above technical solution, the present application solves the buffering failure problem of traditional buffers caused by the tilt of the impact direction, ensuring that the battery pack can still effectively absorb energy through the hydraulic damping buffer 4 when it is hit at multiple angles, avoiding structural damage caused by local stress concentration, thereby improving the safety of the new energy RV battery pack.

[0046] The present application further proposes a collision avoidance buffer for a new energy RV, in which the cross-section of the arc contact plate 10 is a semi-elliptical shape, and the distance from the spherical joint 9 to the center of the contact surface between the arc contact plate 10 and the flat contact plate 11 is smaller than the distance from the spherical joint 9 to any point on the contact surface between the arc contact plate 10 and the flat contact plate 11.

[0047] The semi-elliptical cross-section of the arcuate contact disc 10 refers to the contact surface's profile presenting a semi-elliptical curve. This can be achieved through machining or mold forming processes. This shape allows the radius of the contact surface to gradually change during rolling. The distance from the spherical joint 9 to the center of the contact surface is shorter than the distance to any point on the contact surface. This means that the spherical joint 9 is installed near the center of the contact surface. This can be achieved by adjusting the installation coordinates of the spherical joint 9. This design results in an asymmetric change in the moment arm during rolling of the contact surface.

[0048] Specifically, when an external impact force acts on the buffer connecting frame 2, rolling contact occurs between the arcuate contact disc 10 and the flat contact disc 11. Due to the semi-elliptical cross-section of the arcuate contact disc 10, the distance between the contact point and the spherical joint 9 gradually increases during rolling, pushing the hydraulic piston rod 5 to produce axial displacement. The distance from the spherical joint 9 to the center of the contact surface is smaller than the distance to the edge of the contact surface, making the torque generated by the rolling contact surface change more gradually and avoiding local stress concentration. This structure converts impact forces from different directions into axial movement of the hydraulic damping buffer 4, achieving the absorption of multi-angle impact forces.

[0049] Compared to existing technologies, traditional buffers often have flat or single-arc contact surfaces, which are prone to sliding friction during tilted impacts, resulting in reduced buffering efficiency. This solution utilizes a semi-elliptical contact surface in conjunction with the spherical joint 9 to ensure that rolling contact always takes precedence over sliding contact. Furthermore, the asymmetric distance design optimizes the force transmission path and enhances buffering stability.

[0050] Through the above technical solution, this application effectively solves the problem of low efficiency in converting multi-directional impact forces. Through the synergistic effect of rolling contact and force arm changes, the buffer can quickly trigger the hydraulic damping response under impact in any direction, avoiding energy loss caused by sliding friction, and reducing the risk of wear on the contact surface.

[0051] The present application further proposes that a movable disk 12 is provided on one side of the planar contact disk 11, and a connecting wire rope 13 is fixedly connected to the center of the movable disk 12. A wire rope through hole 1102 is opened in the center of the planar contact disk 11, and the connecting wire rope 13 passes through the wire rope through hole 1102, and a connecting head 1301 is fixedly connected to the end of the connecting wire rope 13. The connecting head 1301 is fixedly connected to the arc contact disk 10 by threads, and an anti-slip spring 14 is provided between the planar contact disk 11 and the movable disk 12.

[0052] The movable disk 12 refers to a rigid disk arranged in parallel with the flat contact disk 11, and can be formed by processing an aluminum alloy plate to maintain the relative position relationship of the contact surface during the impact process. The connecting wire rope 13 refers to a metal wire with tensile strength, and can be a multi-strand stainless steel wire twisted structure, which is used to transmit the traction force between the arc contact disk 10 and the flat contact disk 11. The anti-slip spring 14 refers to a compression spring with adjustable preload, and can be a coil spring structure, which is used to maintain the distance between the movable disk 12 and the flat contact disk 11 in the non-impact state.

[0053] Specifically, when the curved contact disc 10 and the flat contact disc 11 come into rolling contact due to multi-directional impact forces, the movable disc 12 forms a linkage relationship with the curved contact disc 10 through the connecting wire rope 13. The threaded connection between the connector 1301 and the curved contact disc 10 ensures that the direction of the wire rope tension is always perpendicular to the contact surface. The preload of the anti-slip spring 14 offsets the tendency of the contact surface to separate, ensuring effective contact between the curved contact disc 10 and the flat contact disc 11. The arc-shaped chamfer design at both ends of the wire rope through hole 1102 reduces friction loss during wire rope sliding, ensuring that the impact energy is gradually dissipated through the hydraulic damping buffer 4 and the energy-absorbing spring 8.

[0054] Compared to existing technologies, traditional buffers are prone to contact surface separation during non-axial impacts, leading to buffering failure. However, this solution, through the synergistic effect of the movable disc 12 and the anti-separation spring 14, ensures effective contact between the contact surfaces under impact from any direction. The existing technology does not disclose the technical means of achieving contact surface adaptation through wire rope linkage. This solution solves the technical problem of contact surface separation during multi-directional buffering.

[0055] Through the above technical solution, the present application achieves dynamic self-adjustment of the contact surface during multi-directional impacts, effectively preventing buffer failure caused by contact surface separation and ensuring the buffer stability of the battery pack under complex impact conditions. The preload of the anti-slip spring 14 can adapt to impact loads of varying intensities, and the chamfered design of the wire rope through hole 1102 extends the service life of the connection components.

[0056] The present application further proposes that both ends of the wire rope through hole 1102 are processed with arc chamfers.

[0057] Wire rope through hole 1102 refers to the hole in the center of planar contact disc 11 through which the connecting wire rope 13 passes. It can be machined or stamped to guide the wire rope along a predetermined path. The arc chamfered corners are the arc transitions formed at the entrance and exit edges of wire rope through hole 1102. They can be machined or stamped to reduce friction between the wire rope and the edge of the through hole, thereby minimizing wear on the wire rope surface.

[0058] Specifically, when the multi-directional buffer 3 is subjected to an impact, the connecting wire rope 13 displaces within the wire rope through-hole 1102 of the planar contact plate 11. Because the through-hole is chamfered at both ends, the contact area between the wire rope and the through-hole edge transitions from a right angle to a circular transition surface, alleviating the localized stress concentration experienced by the wire rope during movement. This structure prevents surface damage to the wire rope caused by sharp-angled cutting edges, while also reducing sliding friction between the wire rope and the through-hole, ensuring a stable displacement trajectory for the wire rope during the buffering process.

[0059] Compared to existing technologies, conventional wire rope through-holes 1102 typically feature right-angled edges, which can easily cause wire rope wear or even breakage due to sharp friction under impact loads. However, the present invention optimizes the contact surface geometry to a smoothly transitioned arc surface through a curved chamfered structure, significantly improving the contact between the wire rope and the through-hole.

[0060] Through the above technical solution, the present application effectively solves the problem of wear of the wire rope caused by friction on the edge of the through hole during the buffering process, extends the service life of the connecting wire rope 13, and at the same time ensures that the traction force transmission between the planar contact disk 11 and the movable disk 12 is smoother, maintaining the working stability of the multi-directional buffer 3 under complex impact conditions.

[0061] Example 1: Optionally, the present application further proposes that an annular arc surface tooth 1001 is processed on the arc surface contact disc 10, and an annular flat surface tooth 1101 is processed on the flat surface contact disc 11, and the annular arc surface tooth 1001 and the annular flat surface tooth 1101 are meshed with each other.

[0062] Annular cambered teeth 1001 are continuous tooth-shaped structures evenly distributed along the circumference of cambered contact disc 10. They can be formed using CNC milling, with their tooth top profiles equidistant from the curved surface of cambered contact disc 10. Annular flat teeth 1101 are continuous tooth-shaped structures evenly distributed along the circumference of flat contact disc 11. They can be laser cut or stamped, with their tooth depth matching the meshing clearance of annular cambered teeth 1001. The meshing relationship between the two is ensured through precision machining, creating a continuous force transmission path during rolling contact.

[0063] Specifically, when multi-directional impact forces act on the buffer connector 2, the flat contact disc 11 and the arcuate contact disc 10 roll relative to each other. Due to the meshing constraints of the annular arcuate teeth 1001 and the annular flat teeth 1101, the contact surfaces cannot slide laterally, forcing the arcuate contact disc 10 to roll along a predetermined trajectory. As the rolling angle changes, the effective radius of the arcuate contact disc 10 gradually increases, pushing the hydraulic piston rod 5 axially, converting the oblique impact force into an axial compression stroke for the hydraulic damping buffer 4.

[0064] In some specific embodiments, the pitch of the annular arc-shaped teeth 1001 can be set to 3-5 mm, the tooth height to 1.5-2.5 mm, and the tooth angle to be controlled within the range of 45-60 degrees. The tooth groove width of the annular flat teeth 1101 can be slightly larger than the tooth top width of the annular arc-shaped teeth 1001, for example, with a matching clearance of 0.1-0.3 mm to ensure smooth meshing during rolling.

[0065] Compared to existing technologies, traditional buffer devices use smooth contact surfaces or simple friction structures, which are prone to sliding friction losses when subjected to oblique forces. This solution uses a precision meshing tooth structure to convert sliding friction into controlled rolling, reducing energy loss while ensuring controllable direction of impact force transmission.

[0066] Through the above technical solution, this application effectively solves the problem of uncontrollable direction during the transmission of multi-directional impact force, realizes the directional conversion of impact force through tooth engagement constraint, avoids buffer failure caused by sliding friction, and significantly improves the protection reliability of the battery pack under complex impact conditions.

[0067] Example 2: Optionally, the present application further proposes that the contact surfaces of the arc-surface contact disc 10 and the flat contact disc 11 are both inlaid with anti-slip diamond particles.

[0068] The anti-slip diamond particles are hard particles made of silicon carbide or aluminum oxide. They are embedded in the contact disc surface using a high-temperature sintering process. Their particle size can range from 0.1 to 0.5 mm. These particles increase the friction coefficient of the contact surface, preventing the curved contact disc 10 and the flat contact disc 11 from sliding when subjected to force.

[0069] Specifically, when the multi-directional buffer 3 is subjected to an oblique impact force, rolling contact occurs between the curved contact disc 10 and the flat contact disc 11. The inlay of anti-slip corundum particles significantly enhances the friction between the contact surfaces, enabling only rolling motion between the two contact discs, preventing sliding. During rolling, the changing curvature of the curved contact disc 10 gradually converts the oblique impact force into an axial compressive force within the hydraulic damping buffer 4, which is then dissipated through the energy-absorbing spring 8 and hydraulic damping. For example, the distribution density of the corundum particles can be adjusted based on actual load requirements to ensure the stability of the rolling contact.

[0070] Compared to existing technologies, traditional buffers typically use smooth metal or simple textured contact surfaces, which are prone to sliding friction under oblique impacts, resulting in reduced buffering efficiency and even structural damage. This solution leverages the anti-slip properties of corundum particles to convert sliding friction into controllable rolling friction, effectively adapting to multi-angle impact conditions while avoiding the risk of failure due to contact surface wear.

[0071] Through the above technical solution, this application solves the buffer failure problem of traditional buffers caused by contact surface sliding, ensuring that impact force in any direction can be converted into axial buffer force through rolling contact, thereby improving the protection reliability of the battery pack under multi-directional impact conditions.

[0072] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A new energy RV anti-collision buffer, characterized in that: include: A buffer beam, a buffer connecting frame, and a multi-directional buffer, wherein the buffer beam is fixedly mounted on the chassis of the RV by bolts, the buffer connecting frame is fixedly mounted on the battery pack of the new energy RV by bolts, and the multi-directional buffer is fixedly connected between the buffer beam and the buffer connecting frame by bolts; The multi-directional buffer includes a hydraulic damping buffer, a hydraulic piston rod is provided in the hydraulic damping buffer, the end of the hydraulic piston rod is rotatably connected to a curved contact plate, and a flat contact plate is fixedly connected to the buffer connecting frame by bolts, and the curved contact plate is rollingly connected to the flat contact plate.

2. The anti-collision buffer of a new energy RV according to claim 1, characterized in that: The front and rear of the battery pack are both provided with a buffer beam, a buffer connecting frame and a multi-directional buffer.

3. The anti-collision buffer of a new energy RV according to claim 1, characterized in that: More than two groups of multi-directional buffers are arranged between the buffer beam and the buffer connecting frame.

4. The anti-collision buffer of a new energy RV according to claim 1, characterized in that: The outer side of the hydraulic damping buffer is fixedly connected to a pressure regulating disk via threads, the hydraulic piston rod is fixedly connected to a spring blocking piece, the outer jacket of the hydraulic damping buffer is provided with an energy absorbing spring, and the energy absorbing spring is arranged between the pressure regulating disk and the spring blocking piece.

5. The anti-collision buffer of a new energy RV according to claim 1 is characterized in that: A spherical joint is provided between the hydraulic piston rod and the arc-surface contact plate, and the arc-surface contact plate is rotatably connected to the hydraulic piston rod through the spherical joint.

6. The anti-collision buffer of a new energy RV according to claim 5, characterized in that: The cross section of the arcuate contact disc is a semi-ellipse, and the distance from the spherical joint to the center of the contact surface between the arcuate contact disc and the plane contact disc is smaller than the distance from the spherical joint to any point on the contact surface between the arcuate contact disc and the plane contact disc.

7. The anti-collision buffer of a new energy RV according to claim 1, characterized in that: A movable disk is provided on one side of the planar contact disk, and a connecting wire rope is fixedly connected to the center of the movable disk. A wire rope through hole is opened in the center of the planar contact disk, and the connecting wire rope passes through the wire rope through hole. A connecting head is fixedly connected to the end of the connecting wire rope, and the connecting head is fixedly connected to the arc contact disk by threads. An anti-slip spring is provided between the planar contact disk and the movable disk.

8. The anti-collision buffer of a new energy RV according to claim 7, characterized in that: Both ends of the wire rope through hole are processed with arc chamfers.

9. The anti-collision buffer of a new energy RV according to claim 1, characterized in that: The arc surface contact disc is processed with an annular arc surface tooth, and the plane contact disc is processed with an annular plane tooth. The annular arc surface tooth and the annular plane tooth are meshed with each other.

10. The anti-collision buffer of a new energy RV according to claim 1, characterized in that: The contact surfaces of the arc-surface contact disc and the plane contact disc are both inlaid with anti-slip diamond particles.

Images