Automobile anti-collision device based on hydraulic shock absorber

Abstract

This invention discloses a car anti-collision device based on a hydraulic shock absorber, including a sliding groove assembly and a fire extinguisher fixing fixture. The sliding groove assembly includes a sliding groove frame with a sliding groove inside. Several fixed connecting blocks are symmetrically arranged on both sides of the sliding groove frame. A movable support body that can move linearly within the sliding groove is provided on the sliding groove frame. The movable support body also includes a fixture support plate connected to the movable support body. A sliding groove locking component is provided at the top of the sliding groove frame. This fire extinguisher fixing device changes the existing structure that only has an arc-shaped bracket for placing the fire extinguisher. By incorporating a sliding groove assembly that is fixedly connected to the car, the fire extinguisher fixing device can be fixedly connected to the car. The sliding groove assembly can slide relatively linearly, allowing the fire extinguisher fixing device to be installed in a concealed location inside the car, improving the utilization rate of car space. It does not occupy spacious spaces such as the aisle, and also meets national standards for the installation of fire extinguishers in cars.

Description

Technical Field

[0001] This invention relates to an automotive anti-collision component, specifically to an automotive anti-collision device based on a hydraulic shock absorber. Background Technology

[0002] With rising income levels, the number of vehicles owned by residents in my country is increasing year by year. This increase in the number of vehicles on roads inevitably leads to a rise in the number of accidents. Therefore, absorbing energy during a collision is crucial for protecting drivers and passengers. Currently, common vehicle collision energy absorption devices mainly take the following forms: First, movable anti-collision beams made of rectangular tubes or molded materials are bolted to the vehicle frame. While this structure is straightforward, it is heavy, increasing vehicle energy consumption, and its energy absorption effect is limited, with collision energy easily transferred directly to the vehicle's frame. Second, energy absorption designs are integrated into the vehicle's front and rear bulkheads, doors, and other body structures. However, their energy absorption capacity is limited by the inherent structure of the vehicle body, resulting in unsatisfactory cushioning and high repair costs after a collision. To address these issues, some energy absorption components using hydraulic principles have been proposed.

[0003] Chinese invention patent CN113183904B discloses a housing, an upper sealing nut, and a lower sealing nut. The upper and lower sealing nuts respectively seal the upper and lower ends of the housing. The housing has an internal stepped portion, and a sealing nut is positioned at the stepped portion. The sealing nut engages with the stepped portion to divide the interior of the housing into a first space and a second space. Hydraulic oil is filled into the first space, and small-diameter hard plastic beads are filled into the second space. This anti-collision energy-absorbing component uses a combination of hydraulic oil and small-diameter hard plastic beads for energy absorption, and achieves streamlined deformation through a strip-shaped throttling orifice on the inner cylinder, thus solving the problem of energy absorption fluctuation to a certain extent. However, the following drawbacks still exist: First, the energy-absorbing component contains multiple springs, check rings, baffles, and fillers, making its structure relatively complex and its manufacturing cost high. Furthermore, its hydraulic chamber and filler chamber are arranged in series, which may pose a risk of hydraulic oil leakage due to excessive compression stroke of the energy-absorbing rod. Second, relying solely on the damping effect of the hydraulic oil in a single chamber and the energy absorption by the compression deformation of the hard plastic beads in the second space makes it difficult to precisely match the energy dissipation rhythm of the two. When encountering a sudden and violent collision, the throttling energy absorption of the hydraulic oil may reach saturation before the plastic deformation of the hard plastic beads, resulting in a sharp drop in subsequent energy absorption efficiency. This makes it impossible to continuously and stably buffer the impact force, and the absorption and buffering force fluctuates greatly. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a car anti-collision device based on a hydraulic shock absorber. This device has a simple structure, controllable cost, and maintains a continuous and stable buffering and energy absorption effect during sudden and severe collisions, effectively solving the problems of sudden drop and large fluctuation in energy absorption efficiency in existing technologies.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A car collision avoidance device based on hydraulic shock absorbers includes a collision beam, both ends of which are connected to hydraulic collision avoidance devices via connecting brackets. Each hydraulic collision avoidance device includes a hollow cylindrical piston rod detachably connected to the connecting brackets. One end of the piston rod has several first through holes on both sides, and the other end also has several second through holes on both sides. Both the first and second through holes communicate with the interior of the piston rod. A piston is fitted onto the piston rod, enclosing the first through holes. The piston is connected to a sealing ring for sealing, and the sealing ring is connected to a spring for piston rod reset. Springs are all sleeved on the piston rod. A piston cylinder, which encloses the piston, sealing ring, and springs, is also sleeved outside the piston rod. An oil chamber cylinder, which encloses all the second through holes, is provided outside the piston rod. An overflow hole communicating with the oil chamber cylinder is opened at the end of the piston rod. Several oil chamber holes are opened on both sides of the oil chamber cylinder. A cylinder is provided outside the oil chamber cylinder, which encloses it. The end of the piston cylinder encloses the end of the cylinder. A cylinder cover is provided on the end side of the cylinder. An oil filling hole communicating with the inner cavity of the oil chamber cylinder is provided inside the cylinder cover. A fixed mounting assembly for detachable connection with an automobile is provided on the end of the cylinder.

[0006] Furthermore, the inner end of the oil chamber is provided with a buffer pad that is connected to the cylinder cover, and the buffer pad is in the shape of a frustum cone.

[0007] Furthermore, the anti-collision beam is configured as a hollow cuboid.

[0008] Furthermore, the diameter of the first through hole is equal to the diameter of the second through hole.

[0009] Furthermore, a pressure solenoid valve is provided on the overflow hole of the piston rod.

[0010] Furthermore, four first through holes are provided and are evenly and symmetrically opened at the upper end of the piston rod, and eight second through holes are provided and are evenly and symmetrically arranged at the lower end of the piston rod.

[0011] Furthermore, the connecting bracket includes a mounting block located at the end of the anti-collision beam. The mounting block has triangular connecting plates symmetrically arranged on both sides. Both connecting plates are connected to a support plate, and the support plate is vertically installed with the mounting block.

[0012] Furthermore, the fixed mounting assembly includes a fixed mounting plate, which is provided with a mounting connector that covers the end of the cylinder barrel, and the mounting connector and the fixed mounting plate are provided with a plurality of connecting bolts symmetrically.

[0013] Furthermore, the anti-collision beam is made of high-strength steel plate.

[0014] Furthermore, the diameter of the first through hole is equal to the diameter of the second through hole, the diameter of the overflow hole is greater than the diameters of the first and second through holes, and the diameter of the oil cavity hole is smaller than the diameters of the first and second through holes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This automotive anti-collision device, by setting up a multi-stage orderly energy-absorbing hydraulic shock absorber, changes the existing structure that relies on the damping effect of a single-chamber hydraulic oil and the energy absorption of the extrusion deformation of the hard plastic beads in the second space. The structure is simple, the manufacturing cost is controllable, and it maintains a continuous and stable buffer energy absorption effect during sudden and severe collisions, effectively solving the problems of sudden drop and large fluctuation in energy absorption efficiency in the existing technology.

[0016] 2. The hollow rectangular anti-collision beam, made of high-strength steel plate, not only has excellent impact resistance to effectively block external collisions, but also reduces the overall weight of the device through its hollow structure, thus balancing safety and lightweight requirements.

[0017] 3. The buffer pad at the end of the inner cavity of the oil chamber can provide flexible buffering in the early stage of the collision. Combined with the oil damping effect of the hydraulic shock absorber, it can absorb and disperse the collision energy step by step, greatly reducing the impact of the collision on the vehicle body and passengers.

[0018] 4. The pressure solenoid valve on the piston rod overflow hole can dynamically adjust the oil overflow rate according to the collision intensity. Combined with the 10 evenly and symmetrically distributed oil chamber holes, it ensures that the oil flow is smooth and uniform, thus improving the adaptive shock absorption effect of the anti-collision device.

[0019] 5. The combination structure of the triangular connecting plate and support plate of the connecting bracket, the enveloping installation connectors of the fixed installation components, and the symmetrical connecting bolt design enhance the installation stability and structural reliability of the device, while facilitating subsequent disassembly and maintenance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the structure of a hydraulic shock absorber; Figure 4 This is a schematic diagram of the oil chamber cylinder; Figure 5 This is a schematic diagram of the piston rod structure; Figure 6 This is a structural diagram of the installed components; Figure 7 This is a diagram showing the hydraulic oil flow direction when the pressure solenoid valve is closed during a collision. Figure 8 This is a diagram showing the hydraulic oil flow direction when the pressure solenoid valve is open during a collision. Reference numerals: 1. Anti-collision beam; 2. Connecting bracket; 2-1. Mounting block; 2-2. Connecting plate; 2-3. Support plate; 2-4. Mounting hole; 3. Buffer pad; 4. Piston rod; 4-1. First through hole; 4-2. Second through hole; 4-3. Overflow hole; 5. Piston; 6. Sealing ring; 7. Spring; 8. Piston cylinder; 9. Oil chamber cylinder; 9-1. Oil chamber hole; 10. Cylinder; 11. Cylinder cover; 12. Oil injection hole; 13. Fixed mounting assembly; 13. Fixed mounting plate; 13-2. Mounting connector; 13-3. Connecting bolt; 14. Pressure solenoid valve. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1 The present invention provides a specific embodiment of an automotive anti-collision device based on a hydraulic shock absorber, comprising an anti-collision beam 1. Specifically, the length of the anti-collision beam 1 is scientifically and rationally set according to the specific model of the vehicle to which it is installed. Both ends of the anti-collision beam 1 are connected to hydraulic anti-collision devices through connecting brackets 2. When the anti-collision beam 1 is impacted, the impact force can be transmitted to the hydraulic anti-collision devices through the connecting brackets 2. Specifically, in order to ensure a stable connection between the connecting brackets 2 and the anti-collision beam, and to ensure that the impact force can be effectively transmitted, the anti-collision beam 1 and the two connecting brackets are fixed by welding.

[0026] The anti-collision beam 1 is designed in the shape of a hollow cuboid. Specifically, the cuboid shape increases the impact contact surface, which allows the impact force to be more evenly distributed throughout the anti-collision beam and the hydraulic anti-collision device at the rear end, thus improving the overall anti-collision buffering effect. Regular circular or elliptical holes are opened along the length of the anti-collision beam 1 to make its interior hollow. While ensuring structural strength, the lightweight nature of the anti-collision beam 1 is further optimized, thereby reducing the weight of the entire device.

[0027] The hydraulic anti-collision device includes a hollow cylindrical piston rod 4 detachably connected to the connecting bracket 2. Specifically, for easy disassembly and installation, the end of the piston rod 4 is threaded. The connecting bracket 2 has a mounting hole 2-4 through which the threaded end of the piston rod 4 passes. After the threaded end of the piston rod 4 passes through the mounting hole 2-4, a detachable connection is achieved by installing washers and nuts on the threaded ends on both sides of the mounting hole 2-4. However, this is not limited to this. Several first through holes 4-1 are opened on both sides of one end of the piston rod 4, and several second through holes 4-2 are also opened on both sides of the other end of the piston rod 4. The first through holes 4-1 and the second through holes 4-2 communicate with the interior of the piston rod 4. Figure 5 As shown, specifically, the diameter of the first through hole 4-1 is equal to the diameter of the second through hole 4-2. To allow the oil to flow in multiple directions and absorb energy continuously and orderly during a collision, four first through holes are evenly and symmetrically located at the upper end of the piston rod 4, and eight second through holes are evenly and symmetrically located at the lower end of the piston rod 4. A piston 5 is fitted onto the piston rod 4, enclosing the first through hole 4-1. The inner cavity of the piston 5 communicates with the inner cavity of the piston rod 4 through the first through hole 4-1. The piston 5 is connected to a sealing ring 6 for sealing, and the sealing ring 6 is connected to a spring 7 for resetting the piston rod 4. Both the sealing ring 6 and the spring 7 are fitted onto the piston rod 4. Figure 2As shown, a piston cylinder 8, which encloses the piston 5, sealing ring 6, and spring 7, is also sleeved outside the piston rod 4. An oil chamber cylinder 9, which encloses all the second through holes 4-2, is also provided outside the piston rod 4. Specifically, the piston rod 4 can move linearly within the oil chamber cylinder 9. An overflow hole 4-3 communicating with the oil chamber cylinder 9 is provided at the end of the piston rod 4. Figure 3 As shown, the oil chamber cylinder 9 communicates with the piston rod 4 through the second through hole 4-3 and the overflow hole 4-3. Specifically, the diameter of the overflow hole 4-3 is larger than the diameter of the first through hole 4-1 and the second through hole 4-2, so that the oil in the oil chamber cylinder 9 preferentially enters the inner cavity of the piston rod 4 from the overflow hole 4-3. Several oil chamber holes 9-1 are opened on both sides of the oil chamber cylinder 9. Specifically, in order to achieve the effect that the damping generated during the piston rod compression process increases from small to large during a collision, so as to achieve orderly and sufficient absorption of collision energy by the device, the diameter of the oil chamber hole is smaller than the diameter of the first through hole and the second through hole. Specifically, a total of 10 oil chamber holes are provided, and they are evenly and symmetrically opened on both sides of the oil chamber cylinder, so 5 are opened on each side. Figure 4 As shown, the oil chamber cylinder 9 is surrounded by a cylinder 10 that encloses it. The cylinder 10 and the oil chamber cylinder 9 are connected internally through an oil chamber hole 9-1. The end of the piston cylinder 8 encloses the end of the cylinder 10. The piston cylinder 8, the oil chamber cylinder 9, and the cylinder 10 are all hollow cylinders. The cylinder 10 is provided with a cylinder cover 11 at its end, which is used to seal the cylinder 10. The cylinder cover 11 is provided with an oil injection hole 12 that communicates with the inner cavity of the oil chamber cylinder 9. Hydraulic oil can be injected into the oil chamber cylinder 9 through the oil injection hole 12. The end of the cylinder 10 is provided with a fixed mounting assembly 13 for detachable connection with an automobile.

[0028] The connecting bracket 2 includes a mounting block 2-1 located at the end of the anti-collision beam. Specifically, the mounting block 2-1 is square in shape, and triangular connecting plates 2-2 are symmetrically arranged on both sides of the mounting block 2-1. Both connecting plates 2-2 are connected to the support plate 2-3. The support plate 2-3 is vertically installed with the mounting block 2-1. Specifically, the support plate 2-3 has a mounting hole 2-4 through which the piston rod 4 can pass. This structure of the connecting bracket 2 provides a stable support foundation for the piston rod 4 and makes the entire device more compact in spatial layout, making it easy to install in the chassis or bumper area of ​​different vehicle models. On the other hand, it ensures that the impact force can be effectively transmitted.

[0029] In this embodiment, the fixed mounting assembly 13 includes a fixed mounting plate 13-1. The fixed mounting plate 13-1 is provided with a mounting connector 13-2 that covers the end of the cylinder 10. Specifically, the mounting connector 13-2 is shaped like a lifting lug. A plurality of connecting bolts 13-3 are symmetrically arranged on the mounting connector 13-2 and the fixed mounting plate 13-1. Specifically, assuming the fixed mounting plate 13-1 can be securely installed in the vehicle, four connecting bolts 13-3 are provided. Figure 6 As shown, the fixed mounting component 13 with this structure optimizes the lightweighting of the fixed mounting component 13, thereby reducing the weight of the entire device. On the other hand, it facilitates installation and disassembly, while effectively controlling the cost of the device.

[0030] In this embodiment, the inner end of the oil chamber 9 is provided with a buffer pad 3 connected to the cylinder cover 11. Specifically, the buffer pad 3 is shaped like a frustum of a cone and is hollow. The inner cavity of the buffer pad 3 is connected to the oil injection hole 12. The buffer pad 3 is used to form a flexible buffer for the end of the piston rod 4 when the piston rod 4 retracts inward to the limit position due to the collision, so as to avoid a rigid impact with the cylinder cover 11. On the one hand, this reduces the wear of the components, extends the service life of the device, and reduces the noise during the collision process. On the other hand, it effectively improves the anti-collision effect.

[0031] In this embodiment, a pressure solenoid valve 14 is provided on the overflow hole 4-3 of the piston rod 4. Specifically, the pressure solenoid valve 14 has its own energizing component. When the pressure value of the oil chamber cylinder 9 exceeds the set value, the pressure solenoid valve 14 automatically opens, allowing some of the hydraulic oil in the oil chamber cylinder 9 to flow quickly into the piston rod 4 through the overflow hole 4-3. This achieves a gradual increase in the damping generated by the entire device during a collision, further ensuring multi-stage orderly and sufficient energy absorption. At the same time, the pressure solenoid valve 14 can also be adjusted by setting the pressure value to adapt to the shock absorption requirements of different vehicle models or collision scenarios, improving the versatility and adaptability of the device.

[0032] In this embodiment, the anti-collision beam 1 is made of high-strength steel plate, specifically, it can be 510L and B20 copper alloy materials, but it is not limited to these. In this embodiment, 510L material is preferred. This material has high tensile strength and good formability. While meeting the structural strength requirements of the anti-collision beam, it can effectively reduce the weight of the component and adapt to the design requirements of lightweight automobiles. Its excellent impact resistance characteristics can ensure that the anti-collision beam can stably withstand and transmit the impact force to the hydraulic shock absorber when a collision occurs. Combined with the buffering effect of the shock absorber, it further improves the anti-collision effect of the device and provides more reliable safety protection for the vehicle.

[0033] When using this invention: This anti-collision device is installed on the front, rear, and side frames of a vehicle. When a collision occurs, the anti-collision beam 1 first contacts the impact object. Its high-strength steel plate material can initially resist and evenly distribute the impact force. Subsequently, the impact force is transmitted to the piston rod 4 through the connecting bracket 2, pushing the piston rod 4 to retract into the cylinder 10. In the initial stage, the pressure solenoid valve 14 is in the closed state. Part of the hydraulic oil in the oil chamber 9 enters the cylinder through the oil chamber hole 9-1, and part of it enters the inner cavity of the piston rod 4 through the second through hole 4-2, and then flows into the piston cylinder 8 through the first through hole 4-1. At this time, the spring 7 is compressed, which, together with the flow of hydraulic oil, generates initial damping, realizing the first stage of energy absorption. Figure 7 As shown; as the collision force increases, when the pressure inside the oil chamber 9 exceeds the set value of the pressure solenoid valve 14, the pressure solenoid valve 14 automatically opens, and the oil flows rapidly into the inner cavity of the piston rod 4 through the overflow hole 4-3, further increasing the damping and completing the second stage of energy absorption, as shown. Figure 8 As shown, when the piston rod 4 retracts to its limit position, the buffer pad 3 at the end of the oil chamber cylinder 9 forms a flexible buffer to avoid rigid impact. The entire process effectively reduces the damage to the vehicle and occupants through multi-stage orderly energy absorption, while the lightweight structural design does not add extra burden to the vehicle.

[0034] The collision absorption process of this anti-collision device involves first the hydraulic shock absorber absorbing energy, then the buffer pad 3 absorbing energy, and finally the mechanical impact of the outer shell structure. Therefore, the amount of hydraulic oil in the hydraulic shock absorber is one of the key factors affecting the collision absorption effect. The appropriate amount of oil must be precisely matched according to the vehicle model, weight, and expected collision protection level. The anti-collision device of this invention can achieve a deceleration of 7g upon collision. Furthermore, apart from the length of the anti-collision beam 1 being adjustable as needed (vehicle model, outer shell), all other components can be made into universal parts, further reducing costs and minimizing dependence on production equipment.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A car anti-collision device based on hydraulic shock absorbers, comprising an anti-collision beam (1), wherein both ends of the anti-collision beam (1) are connected to hydraulic anti-collision devices via connecting brackets (2); characterized in that: The hydraulic anti-collision device includes a hollow cylindrical piston rod (4) detachably connected to the connecting bracket (2). Several first through holes (4-1) are provided on both sides of one end of the piston rod (4), and several second through holes (4-2) are also provided on both sides of the other end of the piston rod (4). The first through holes (4-1) and second through holes (4-2) communicate with the interior of the piston rod (4). A piston (5) is fitted onto the piston rod (4) and encloses the first through holes (4-1). A sealing ring (6) is connected to the piston (5) for sealing it. The sealing ring (6) is connected to a spring (7) for resetting the piston rod (4). The sealing ring (6) and spring (7) are both fitted onto the piston rod (4). A device is also fitted around the piston rod (4) to hold the piston (5). A piston cylinder (8) is enclosed by a sealing ring (6) and a spring (7). An oil chamber cylinder (9) is provided outside the piston rod (4) and encloses all the second through holes (4-2). An overflow hole (4-3) communicating with the oil chamber cylinder (9) is provided at the end of the piston rod (4). Several oil chamber holes (9-1) are provided on both sides of the oil chamber cylinder (9). A cylinder cylinder (10) is provided outside the oil chamber cylinder (9) and encloses it. The end of the piston cylinder (8) encloses the end of the cylinder cylinder (10). A cylinder cover (11) is provided on the end side of the cylinder cylinder (10). An oil injection hole (12) communicating with the inner cavity of the oil chamber cylinder (9) is provided inside the cylinder cover (11). A fixed mounting assembly (13) for detachable connection with an automobile is provided on the end of the cylinder cylinder (10).

2. The automotive anti-collision device based on a hydraulic shock absorber according to claim 1, characterized in that: A pressure solenoid valve (14) is provided on the overflow hole (4-3) of the piston rod (4).

3. The automotive anti-collision device based on a hydraulic shock absorber according to claim 1 or 2, characterized in that: The inner end of the oil chamber (9) is provided with a buffer pad (3) that is connected to the cylinder cover (11).

4. The automotive anti-collision device based on a hydraulic shock absorber according to claim 3, characterized in that: The connecting bracket (2) includes a mounting block (2-1) located at the end of the anti-collision beam (1). The mounting block (2-1) has triangular connecting plates (2-2) symmetrically arranged on both sides. Both connecting plates (2-2) are connected to the support plate (2-3). The support plate (2-3) is vertically installed with the mounting block (2-1).

5. The automotive anti-collision device based on a hydraulic shock absorber according to claim 3, characterized in that: The fixed mounting assembly (13) includes a fixed mounting plate (13-1), on which a mounting connector (13-2) is provided to cover the end of the cylinder (10), and a plurality of connecting bolts (13-3) are symmetrically provided on the mounting connector (13-2) and the fixed mounting plate (13-1).

6. The automotive anti-collision device based on a hydraulic shock absorber according to claim 5, characterized in that: The anti-collision beam (1) is designed in the shape of a hollow cuboid.

7. The automotive anti-collision device based on a hydraulic shock absorber according to any one of claims 4 to 6, characterized in that: The diameter of the first through hole (4-1) is equal to the diameter of the second through hole (4-2), the diameter of the overflow hole is greater than the diameters of the first through hole (4-1) and the second through hole (4-2), and the diameter of the oil cavity hole (9-1) is smaller than the diameters of the first through hole (4-1) and the second through hole (4-2).

8. The automotive anti-collision device based on a hydraulic shock absorber according to claim 7, characterized in that: The anti-collision beam (1) is made of high-strength steel plate.

9. The automotive anti-collision device based on a hydraulic shock absorber according to claim 3, characterized in that: Four first through holes (4-1) are provided and are evenly and symmetrically opened at the upper end of the piston rod (4), and eight second through holes (4-2) are provided and are evenly and symmetrically arranged at the lower end of the piston rod (4).

10. The automotive anti-collision device based on a hydraulic shock absorber according to claim 9, characterized in that: The buffer pad (3) is configured in the shape of a frustum.

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