An unmanned vehicle collision energy absorption device

Abstract

The present invention discloses a collision energy absorption device for an unmanned vehicle, comprising a front baffle, a telescopic rod, a telescopic cylinder, a fixed cylinder and a base. By providing a secondary energy absorption structure, in the event of a minor collision, only the first-stage energy absorption structure absorbs energy. In this state, the front baffle will move slightly backward and recover after the vehicle moves away, thereby reducing damage to the front baffle caused by collision. However, when the kinetic energy during the collision is large, the second-stage energy absorption structure will be triggered to absorb energy, causing the front baffle to move further backward. When the kinetic energy during the collision is even greater, the secondary energy absorption mechanism directly releases all energy and triggers the emergency brake assembly to help the vehicle stop, thereby reducing damage caused by the collision.

Description

Technical Field

[0001] The present invention relates to the field of unmanned vehicle driving, and in particular to a collision energy absorption device for an unmanned vehicle. Background Art

[0002] Due to the scarcity and shortcomings of human resources, the market for autonomous vehicles is growing. The development of the Internet of Things, intelligent technology, and information technology are making autonomous vehicles a reality. Currently, the autonomous vehicles that are widely used are primarily for express and food delivery, typically operating on internal roads. These vehicles are generally less dangerous due to their slow speed.

[0003] However, autonomous driving is still not very mature. If the autonomous driving system fails at a critical moment, the autonomous vehicle may not brake in time after colliding with a person or object. This may prevent the pedestrian from being seriously injured at the moment of collision due to the vehicle's slow speed, and it may also cause secondary injuries to pedestrians during subsequent driving (such as running over pedestrians). If the autonomous vehicle collides with an object (such as a roadside trash can), it may also carry more debris when pushing the trash can, affecting the autonomous vehicle's driving and road safety. Therefore, a safety measure is best. Summary of the Invention

[0004] The purpose of the present invention is to provide a collision energy absorption device for an unmanned vehicle. By setting a secondary energy absorption structure, in the event of a minor collision (for example, when encountering branches or greenery extending to the roadside), only the first-stage energy absorption structure absorbs energy. In this state, the front fender will move slightly backward and recover after the vehicle moves away, reducing damage to the front fender caused by the collision. However, when the kinetic energy during the collision is large (for example, when encountering garbage thrown on the road), the second-stage energy absorption structure will be triggered to absorb energy, causing the front fender to move further backward. When the kinetic energy during the collision is even greater (for example, when colliding with pedestrians, bicycles and other objects with large mass), the secondary energy absorption mechanism directly releases all energy and triggers the emergency brake assembly to help the vehicle stop, reducing the damage caused by the collision, while also avoiding secondary damage caused by the vehicle not stopping.

[0005] A collision energy absorption device for an unmanned vehicle includes a front baffle, a telescopic rod, a telescopic cylinder, a fixed cylinder, and a base. The front baffle is fixedly connected to the front end of the telescopic rod, the rear end of the telescopic rod is slidably connected to the telescopic cylinder, the rear end of the telescopic cylinder is slidably connected to the fixed cylinder, and the rear end of the fixed cylinder is fixedly connected to the base.

[0006] An emergency brake assembly is provided at the bottom of the base, and the emergency brake assembly includes a support plate, a rotating shaft and a non-slip roller. The rotating shaft is fixedly connected to the rear end of the support plate, and the non-slip roller is fixedly connected to the front end of the support plate. A connecting block is also fixedly provided at the bottom of the base, and the rotating shaft is rotatably connected to the connecting block. A card strip is also fixedly connected to the support plate, and a card socket that matches the card strip is provided in the base.

[0007] Preferably, the outer surfaces of the telescopic rod and the telescopic cylinder are provided with sliding grooves, and the inner sides of the upper ports of the telescopic cylinder and the fixed cylinder are also provided with inwardly protruding sliders, which are slidably connected in the corresponding sliding grooves.

[0008] Preferably, the telescopic cylinder is provided with a telescopic cylinder inner cavity, the bottom of the telescopic cylinder is also provided with a plurality of exhaust holes, and the bottom end of the telescopic cylinder is provided with a first closing plate, a pair of plug rods are fixedly connected to the first closing plate, and a limit plate is fixedly connected to the plug rods, the limit plate is slidably connected to the limit groove provided in the telescopic cylinder, and a limit spring is also connected between the limit plate and the bottom of the limit groove, a stopper is slidably connected to the side wall of the telescopic cylinder, the front end of the stopper is spherical and is located in the slide groove on the telescopic cylinder, and a first spring is also connected between the rear end of the stopper and the telescopic cylinder.

[0009] Preferably, a fixed cylinder inner cavity and an exhaust chamber are provided in the fixed cylinder, an exhaust channel is provided on the partition between the fixed cylinder inner cavity and the exhaust chamber, and a second sealing plate is provided at the bottom end of the partition, and two connecting rods are provided on the second sealing plate, and the upper end of the connecting rod is fixedly connected with a snap lock, and the snap lock is slidably connected in the above-mentioned partition, and the left and right sides of the snap lock are telescopically and slidably connected with a telescopic snap, and a second spring is connected between the two telescopic snaps.

[0010] Preferably, the exhaust chamber is connected to the base inner cavity in the base through an exhaust pipe, a piston plate is slidably connected in the base inner cavity, a third spring is connected between the rear end of the piston plate and the bottom of the base inner cavity, and a card socket and an air leakage hole that are connected to the outside are provided in the base inner cavity on the rear side of the piston plate.

[0011] Preferably, the second sealing plate is connected to a connecting air pipe, the connecting air pipe is slidably connected to the fixed cylinder and the base, and the front end outlet of the connecting air pipe is communicated with the exhaust channel.

[0012] Preferably, the outer surface of the anti-slip roller is provided with a plurality of raised blocks.

[0013] The advantage of the present invention is that by setting up a secondary energy-absorbing structure, in the event of a minor collision (for example, encountering branches or greenery extending to the roadside), only the first-stage energy-absorbing structure absorbs energy. In this state, the front fender will move slightly backward and recover after the vehicle moves away, reducing damage to the front fender caused by the collision. However, when the kinetic energy during the collision is large (for example, encountering garbage thrown on the road), the second-stage energy-absorbing structure will be triggered to absorb energy, causing the front fender to move further backward. When the kinetic energy during the collision is even greater (for example, when colliding with pedestrians, bicycles, and other objects with large mass), the secondary energy-absorbing mechanism directly releases all energy and triggers the emergency brake assembly to help the vehicle stop, reducing the damage caused by the collision, while also avoiding secondary damage caused by the vehicle not stopping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the overall structure of the device of the present invention;

[0015] Figure 2 Schematic diagram of the structure of the brake assembly in the device of the present invention;

[0016] Figure 3 Schematic diagram of the internal structure of the device of the present invention;

[0017] Figure 4 for Figure 3 The large square image of Part A;

[0018] Figure 5 for Figure 3 The large picture of the middle section B;

[0019] Among them, 11, front baffle, 12, telescopic rod, 13, telescopic cylinder, 14, fixed cylinder, 15, base, 16, connecting block, 17, support plate, 18, rotating shaft, 19, anti-slip roller, 20, card insertion strip, 101, slide, 102, telescopic cylinder cavity, 103, fixed cylinder cavity, 104, exhaust chamber, 105, exhaust pipe, 106, exhaust through hole, 107, first sealing plate, 108, insertion rod , 109, limit plate, 110, limit spring, 111, limit groove, 112, block, 113, first spring, 120, exhaust channel, 121, second sealing plate, 122, snap lock, 123, telescopic snap, 124, second spring, 201, base cavity, 202, piston plate, 203, third spring, 204, card socket, 205, air leakage hole, 206, connecting air pipe. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figures 1 to 5As shown, the present invention includes a front baffle 11, a telescopic rod 12, a telescopic cylinder 13, a fixed cylinder 14 and a base 15. The front baffle 11 is fixedly connected to the front end of the telescopic rod 12, the rear end of the telescopic rod 12 is slidably connected in the telescopic cylinder 13, the rear end of the telescopic cylinder 13 is slidably connected in the fixed cylinder 14, and the rear end of the fixed cylinder 14 is fixedly connected to the base 15.

[0022] An emergency brake assembly is provided at the bottom of the base 15, and the emergency brake assembly includes a support plate 17, a rotating shaft 18 and a non-slip roller 19. The rotating shaft 18 is fixedly connected to the rear end of the support plate 17, and the non-slip roller 19 is fixedly connected to the front end of the support plate 17. A connecting block 16 is also fixedly provided at the bottom of the base 15, and the rotating shaft 18 is rotatably connected to the connecting block 16. A card strip 20 is also fixedly connected to the support plate 17, and a card socket 204 that cooperates with the card strip 20 is provided in the base 15.

[0023] The outer surfaces of the telescopic rod 12 and the telescopic cylinder 13 are provided with sliding grooves 101 , and the inner sides of the upper ends of the telescopic cylinder 13 and the fixed cylinder 14 are also provided with inwardly protruding sliders, which are slidably connected in the corresponding sliding grooves 101 .

[0024] In particular, the telescopic cylinder 13 is provided with a telescopic cylinder inner cavity 102, and the bottom of the telescopic cylinder 13 is also provided with a plurality of exhaust holes 106, and the bottom end of the telescopic cylinder 13 is provided with a first closing plate 107, and a pair of plug rods 108 are fixedly connected to the first closing plate 107, and a limiting plate 109 is fixedly connected to the plug rod 108, and the limiting plate 109 is slidably connected to the limiting groove 111 provided in the telescopic cylinder 13, and a limiting spring 110 is also connected between the limiting plate 109 and the bottom of the limiting groove 111, and a stopper 112 is slidably connected to the side wall of the telescopic cylinder 13, and the front end of the stopper 112 is spherical and is located in the slide groove 101 on the telescopic cylinder 13, and a first spring 113 is also connected between the rear end of the stopper 112 and the telescopic cylinder 13.

[0025] When the car is slightly collided, the front fender 11 moves backward with the telescopic rod 12, and the telescopic rod 12 moves backward into the telescopic cylinder cavity 102 of the telescopic cylinder 13, squeezing the air therein. The air compression absorbs energy and prevents the front fender 11 from being squeezed and deformed and damaged. If the front fender 11 is squeezed with a large force, the air pressure in the telescopic cylinder cavity 102 gradually increases, eventually causing the first sealing plate 107 to move downward. The downward movement of the first sealing plate 107 brings the insertion rod 108 downward, so that the block 112 is released and can be retracted. Therefore, the telescopic cylinder 13 can also move backward into the fixed cylinder cavity 103 in the fixed cylinder 14. At the same time, the exhaust hole 106 is also exposed. At this time, the primary and secondary energy absorption structures are fully open and can automatically recover after the vehicle leaves.

[0026] The key point is that a fixed cylinder inner cavity 103 and an exhaust chamber 104 are provided in the fixed cylinder 14, and an exhaust channel 120 is provided on the partition between the fixed cylinder inner cavity 103 and the exhaust chamber 104, and a second sealing plate 121 is provided at the bottom end of the partition, and two connecting rods are provided on the second sealing plate 121, and the upper end of the connecting rod is fixedly connected with a snap lock 122, and the snap lock 122 is slidably connected in the above-mentioned partition, and the left and right sides of the snap lock 122 are telescopically and slidably connected with a telescopic snap 123, and a second spring 124 is connected between the two telescopic snaps 123. The exhaust chamber 104 is connected to the base inner cavity 201 in the base 15 through the exhaust pipe 105. A piston plate 202 is slidably connected in the base inner cavity 201. A third spring 203 is connected between the rear end of the piston plate 202 and the bottom of the base inner cavity 201, and a card socket 204 and a leakage hole 205 that are connected to the outside are provided in the base inner cavity 201 on the rear side of the piston plate 202.

[0027] Therefore, when the kinetic energy during a collision is greater, the air pressure in the inner cavity 103 of the fixed cylinder continues to increase, eventually causing the telescopic buckle 123 on the buckle lock 122 to retract into the buckle lock 122. At this time, the second sealing plate 121 is released and moves downward under the action of the air pressure, exposing the exhaust channel 120. The gas enters the exhaust chamber 104 and eventually reaches the base inner cavity 201 through the exhaust pipe 105. After the gas enters the base inner cavity 201, it pushes the piston plate 202 backward. The backward movement of the piston plate 202 pushes the card insert 20 to bend, and finally causes the card insert 20 to disengage from the card insertion port 204. The anti-slip roller 19 and the support plate 17 will then rapidly fall and rotate under the action of gravity, and finally the anti-slip roller 19 will fall to the ground, acting as an emergency brake, reducing the distance the vehicle slides forward and reducing the damage to pedestrians and vehicles.

[0028] In particular, the second sealing plate 121 is connected to a connecting air pipe 206, which is slidably connected to the fixing cylinder 14 and the base 15, and the front end outlet of the connecting air pipe 206 is connected to the exhaust channel 120. The outer surface of the anti-slip roller 19 is provided with a plurality of protrusions 21.

[0029] Specific implementation and principle:

[0030] In the event of a minor collision, such as a slight bump against a curb or pillar while maneuvering, the front fender 11 moves backward with the telescopic rod 12, which moves backward into the telescopic cylinder cavity 102 of the telescopic cylinder 13, squeezing the air therein. The air compression absorbs energy, thus preventing the front fender 11 from being deformed and damaged by squeezing. If the front fender 11 is squeezed with greater force, the air pressure in the telescopic cylinder cavity 102 gradually increases, eventually causing the first sealing plate 107 to move downward, which in turn causes the insertion rod 108 to move downward, releasing the block 112 and allowing it to retract. As a result, the telescopic cylinder 13 can also move backward into the fixed cylinder cavity 103 of the fixed cylinder 14. At the same time, the exhaust hole 106 is exposed, and the primary and secondary energy absorption structures are fully open, and can automatically reset after the vehicle leaves.

[0031] When the kinetic energy of a collision is greater, especially when colliding with an electric vehicle or a pedestrian, if the collision force is relatively large, after the primary and secondary energy-absorbing structures are fully opened, the air pressure in the fixed cylinder cavity 103 continues to increase, eventually causing the telescopic buckle 123 on the buckle lock 122 to retract into the buckle lock 122. At this time, the second sealing plate 121 is loosened and moves downward under the action of air pressure, exposing the exhaust channel 120, and the gas enters the exhaust chamber 104 and eventually enters the base cavity 201 through the exhaust pipe 105. Since the gas in the telescopic cylinder cavity 102 and the fixed cylinder cavity 103 can be discharged, the absorbed kinetic energy will not be released again, and the front baffle 11 will not rebound, thereby avoiding the release of kinetic energy and causing secondary damage to pedestrians.

[0032] After the gas enters the base cavity 201, it pushes the piston plate 202 backward. This backward movement of the piston plate 202 bends the card insert 20, eventually causing the card insert 20 to detach from the card slot 204. Since the air leakage hole 205 is slightly in front of the card slot 204, when the card insert 20 is pushed away, the gas will also be discharged through the air leakage hole 205, releasing energy. After the card insert 20 detaches from the card slot 204, the anti-skid roller 19 and the support plate 17 will rapidly fall and rotate under the action of gravity, and eventually the anti-skid roller 19 will fall to the ground, acting as an emergency brake, reducing the distance the vehicle slides forward and minimizing damage to pedestrians and vehicles.

[0033] Based on the above, the present invention sets a secondary energy-absorbing structure. In the event of a minor collision (for example, when encountering branches or greenery extending to the roadside), only the first-stage energy-absorbing structure absorbs energy. In this state, the front fender will move slightly backward and recover after the vehicle moves away, reducing damage to the front fender caused by the collision. However, when the kinetic energy during the collision is large (for example, when encountering garbage thrown on the road), the second-stage energy-absorbing structure will be triggered to absorb energy, causing the front fender to move further backward. When the kinetic energy during the collision is even greater (for example, when colliding with pedestrians, bicycles, and other objects with large mass), the secondary energy-absorbing mechanism directly releases all energy and triggers the emergency brake assembly to help the vehicle stop, reducing the damage caused by the collision, while also avoiding secondary damage caused by the vehicle not stopping.

[0034] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. An unmanned vehicle collision energy absorption device, characterized in that: The utility model comprises a front baffle (11), a telescopic rod (12), a telescopic cylinder (13), a fixed cylinder (14) and a base (15), wherein the front baffle (11) is fixedly connected to the front end of the telescopic rod (12), the rear end of the telescopic rod (12) is slidably connected in the telescopic cylinder (13), the rear end of the telescopic cylinder (13) is slidably connected in the fixed cylinder (14), and the rear end of the fixed cylinder (14) is fixedly connected to the base (15); An emergency brake assembly is provided at the bottom of the base (15), and the emergency brake assembly includes a support plate (17), a rotating shaft (18) and a non-slip roller (19). The rotating shaft (18) is fixedly connected to the rear end of the support plate (17), and the non-slip roller (19) is fixedly connected to the front end of the support plate (17). A connecting block (16) is also fixedly provided at the bottom of the base (15), and the rotating shaft (18) is rotatably connected to the connecting block (16). A plug-in connector is also fixedly connected to the support plate (17). The base (15) is provided with a card insertion port (204) matched with the card insertion strip (20), the outer surfaces of the telescopic rod (12) and the telescopic cylinder (13) are provided with a slide groove (101), the inner sides of the upper ports of the telescopic cylinder (13) and the fixed cylinder (14) are also provided with an inwardly protruding slider, which is slidably connected to the corresponding slide groove (101), the fixed cylinder (14) is provided with a fixed cylinder inner cavity (103) and an exhaust chamber (104), and the fixed cylinder inner cavity (103) and the exhaust chamber (104) are provided. An exhaust passage (120) is provided on a partition between the cavity (103) and the exhaust chamber (104), and a second sealing plate (121) is provided at the bottom end of the partition. Two connecting rods are provided on the second sealing plate (121). The upper end of the connecting rod is fixedly connected with a snap lock (122). The snap lock (122) is slidably connected in the above-mentioned partition, and the left and right sides of the snap lock (122) are telescopically and slidably connected with a telescopic snap lock (123). A second elastic spring is connected between the two telescopic snap locks (123). The exhaust chamber (104) is connected to the base inner cavity (201) in the base (15) through the exhaust pipe (105); a piston plate (202) is slidably connected in the base inner cavity (201); a third spring (203) is connected between the rear end of the piston plate (202) and the bottom of the base inner cavity (201); and a card socket (204) and an air leakage hole (205) that are connected to the outside are provided in the base inner cavity (201) on the rear side of the piston plate (202).

2. The unmanned vehicle collision energy absorption device according to claim 1, characterized in that: The telescopic cylinder (13) is provided with a telescopic cylinder inner cavity (102), and the bottom of the telescopic cylinder (13) is also provided with a plurality of exhaust holes (106), and the bottom end of the telescopic cylinder (13) is provided with a first closing plate (107), a pair of plug rods (108) are fixedly connected to the first closing plate (107), and a limiting plate (109) is fixedly connected to the plug rod (108), and the limiting plate (109) is slidably connected to a limiting groove (111) provided in the telescopic cylinder (13), and a limiting spring (110) is also connected between the limiting plate (109) and the bottom of the limiting groove (111), and a stopper (112) is slidably connected in the side wall of the telescopic cylinder (13), the front end of the stopper (112) is spherical and is located in the slide groove (101) on the telescopic cylinder (13), and a first spring (113) is also connected between the rear end of the stopper (112) and the telescopic cylinder (13).

3. The unmanned vehicle collision energy absorption device according to claim 1, characterized in that: The second sealing plate (121) is connected to a connecting air pipe (206), the connecting air pipe (206) is slidably connected to the fixed cylinder (14) and the base (15), and the front end outlet of the connecting air pipe (206) is in communication with the exhaust channel (120).

4. The unmanned vehicle collision energy absorption device according to claim 1, characterized in that: The outer surface of the anti-slip roller (19) is provided with a plurality of protruding blocks (21).

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