A road maintenance vehicle with a rear airbag

Abstract

The utility model relates to a highway maintenance vehicle technical field, especially a highway maintenance vehicle with tail safety air bag, the utility model has the advantages of: through the protection frame and the rear-end vehicle contact, make the impact even exert on the buffer air bag, through the compression energy absorption of buffer spring and the elastic compression of buffer air bag, can slowly weaken the impact force, slow down the impact speed, realize the buffer protection, improve the protection effect, reduce the injury of rear-end, improve the injury to the driver of the rear vehicle, after the compression of buffer air bag, gas is extruded to the piston cylinder inner wall, makes the air pressure push the piston, pushes the support through the thrust spring, limits its sliding speed, thereby realizes the buffer, slows down the compression speed of buffer air bag, can make gas discharge through the exhaust hole after pushing the piston to slide to the exhaust hole side, thereby weakening the pressure of buffer air bag, prevents the burst caused by the overpressure, and the exhaust airflow can reduce the reaction force of air pressure.

Description

Technical Field

[0001] This utility model relates to the field of highway maintenance vehicle technology, and in particular to a highway maintenance vehicle with a rear airbag. Background Technology

[0002] Highway maintenance vehicles play a crucial role in highway maintenance operations. However, they currently face significant safety risks during operation. Due to the high traffic volume and speed on highways, despite the presence of warning devices ahead of construction sections, accidents involving rear-end collisions with maintenance vehicles frequently occur due to unsafe driving behaviors such as driver fatigue and inattention.

[0003] Currently, some highway maintenance vehicles are equipped with safety features such as warning lights and reflective markings, which can serve as a warning and reduce the probability of accidents to some extent. However, in the event of a rear-end collision, these conventional protective measures have limited effectiveness in protecting the maintenance vehicle and its occupants. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a highway maintenance vehicle with a rear airbag, which effectively solves the deficiencies of the prior art.

[0005] To achieve the above objectives, one embodiment of this utility model provides a highway maintenance vehicle with a rear airbag, comprising a vehicle body. Several guide holes are provided on both sides of the rear surface of the vehicle body. Guide posts are slidably connected to the inner walls of the guide holes. A protective frame is fixedly connected to one end of each guide post. The protective frame covers the rear of the vehicle body. A buffer airbag is fixedly connected between the protective frame and the vehicle body on the side of the protective frame closest to the vehicle body. A buffer spring is sleeved on the outer wall of each guide post, located between the inner wall of the protective frame and the rear of the vehicle body. A buffer airbag is located near the top surface of the vehicle body. Piston cylinders are fixedly connected to both sides of one edge of the airbag. Exhaust pipes are fixedly connected to both sides of the top of one side of the airbag. The output ends of the two exhaust pipes are connected to the inside of the piston cylinder. An exhaust hole is opened at the center of the top of the two exhaust pipes. A piston is slidably connected to the inner wall of the two exhaust pipes. A guide pipe is fixedly connected to the center of one side of the piston. The guide pipe extends through the outside of the piston cylinder. A thrust spring is sleeved on the outer wall of the guide pipe. The thrust spring is located between the piston and the inner wall of the piston cylinder. A one-way valve that opens to the inside of the piston cylinder is fixedly connected to the center of the piston. The guide pipe is connected to the inside of the piston cylinder through the one-way valve.

[0006] Preferably, in any of the above schemes, the depth of the guide holes is greater than the length of the guide post, the thickness of the buffer airbag when fully expanded is less than the length of the guide post, and the length of the buffer spring after full reset is adapted to the thickness of the buffer airbag when fully expanded.

[0007] The technical effect achieved by adopting the above solution is that the buffer spring can fully push the buffer airbag to unfold, and the thickness of the buffer airbag can limit the guide post from sliding out of the guide hole.

[0008] Preferably, in any of the above embodiments, the top of the buffer airbag is higher than the top surface of the maintenance vehicle body, the bottom of the buffer airbag corresponds to the bottom surface of the maintenance vehicle body, and the exhaust pipe is located at the part of the buffer airbag that is higher than the top surface of the maintenance vehicle body.

[0009] The technical effect achieved by adopting the above solution is that the airbag can fully absorb the impact force of the vehicle collision, and the exhaust pipe at the top can fully discharge the exhaust.

[0010] Preferably, in any of the above schemes, the length of the guide tube is greater than the length of the piston cylinder, and the length of the thrust spring after reset is adapted to the length of the piston cylinder.

[0011] The technical effect achieved by adopting the above solution is that the end of the guide tube can be kept outside the piston cylinder, so that the external airflow can be effectively drawn in, and the thrust spring can completely push the piston back to its original position.

[0012] Preferably, in any of the above embodiments, the thickness of the piston is less than the distance from the exhaust port to the end of the piston cylinder away from the exhaust pipe, and the diameter of the exhaust port is less than the diameter of the exhaust pipe.

[0013] The technical effect achieved by adopting the above solution is that the piston can be completely slid to the exhaust port side, allowing the airflow to be discharged through the exhaust port and the air pressure to be released.

[0014] This utility model has the following advantages: 1. This highway maintenance vehicle equipped with a rear airbag contacts the rear-end collision vehicle through the protective frame, ensuring that the impact is evenly applied to the airbag. Through the energy absorption of the buffer spring and the elastic compression of the airbag, the impact force can be gradually weakened, the impact speed reduced, and buffer protection achieved. This improves the protective effect, reduces the damage from rear-end collisions, and increases the risk of injury to the driver of the following vehicle.

[0015] 2. In this highway maintenance vehicle equipped with a rear airbag, after the airbag is compressed, the gas is squeezed into the inner wall of the piston cylinder, thereby pushing the piston with air pressure. At the same time, the thrust spring pushes the support, limiting its sliding speed, thus achieving cushioning and slowing down the compression speed of the airbag. After pushing the piston to the exhaust port side, the gas can be discharged through the exhaust port, thereby weakening the pressure of the airbag and preventing excessive internal pressure from causing it to burst. At this time, the impact is basically stopped, and the discharged airflow can reduce the reaction force of the air pressure, reduce the reverse thrust on the vehicle, and improve the protective effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0017] In the diagram: 1-Main body of maintenance vehicle, 2-Guide hole, 3-Guide column, 4-Protective frame, 5-Buffer spring, 6-Buffer airbag, 7-Exhaust pipe, 8-Piston cylinder, 9-Guide tube, 10-Piston, 11-One-way valve, 12-Thrust spring, 13-Exhaust hole. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0019] like Figures 1 to 3As shown, a highway maintenance vehicle with a rear airbag includes a vehicle body 1. Several guide holes 2 are formed on both sides of the rear surface of the vehicle body 1. Guide posts 3 are slidably connected to the inner walls of the guide holes 2. A protective frame 4 is fixedly connected to one end of each guide post 3. The protective frame 4 covers the rear of the vehicle body 1. A buffer airbag 6 is fixedly connected between the protective frame 4 and the vehicle body 1 on the side of the protective frame 4 closest to the vehicle body 1. A buffer spring 5 is sleeved on the outer wall of each guide post 3, located between the inner wall of the protective frame 4 and the rear of the vehicle body 1. Two additional airbags 6 are fixedly connected to the top surface of the vehicle body 1 on both sides of the edge closest to the buffer airbag 6. Both sides of the piston cylinder 8 and the buffer airbag 6 are fixedly connected to exhaust pipes 7. The output ends of the two exhaust pipes 7 are connected to the inside of the piston cylinder 8. An exhaust hole 13 is opened at the center of the top of the two exhaust pipes 7. A piston 10 is slidably connected to the inner wall of the two exhaust pipes 7. A guide pipe 9 is fixedly connected to the center of one side of the piston 10. The guide pipe 9 extends out of the piston cylinder 8. A thrust spring 12 is sleeved on the outer wall of the guide pipe 9. The thrust spring 12 is located between the piston 10 and the inner wall of the piston cylinder 8. A one-way valve 11 that opens one-way to the inside of the piston cylinder 8 is fixedly connected to the center of the piston 10. The guide pipe 9 is connected to the inside of the piston cylinder 8 through the one-way valve 11.

[0020] As an optional technical solution of this utility model, the depth of several guide holes 2 is greater than the length of guide post 3, the thickness of buffer airbag 6 when fully expanded is less than the length of guide post 3, and the length of buffer spring 5 after fully reset is adapted to the thickness of buffer airbag 6 when fully expanded, so that buffer spring 5 can fully push buffer airbag 6 to unfold, and at the same time the thickness of buffer airbag 6 can restrict guide post 3 from sliding out of guide hole 2.

[0021] As an optional technical solution of this utility model, the top of the buffer airbag 6 is higher than the top surface of the maintenance vehicle body 1, the bottom of the buffer airbag 6 corresponds to the bottom surface of the maintenance vehicle body 1, and the exhaust pipe 7 is located at the part of the top of the buffer airbag 6 that is higher than the top surface of the maintenance vehicle body 1, so that the buffer airbag 6 can fully receive the impact force of the vehicle collision, and the exhaust pipe 7 at the top can fully discharge.

[0022] As an optional technical solution of this utility model, the length of the guide tube 9 is greater than the length of the piston cylinder 8, and the length of the thrust spring 12 after reset is adapted to the length of the piston cylinder 8, so that the end of the guide tube 9 is kept outside the piston cylinder 8, so that the external airflow can be effectively drawn in, and at the same time the thrust spring 12 can completely push the piston 10 to reset.

[0023] As an optional technical solution of this utility model, the thickness of the piston 10 is less than the distance from the exhaust hole 13 to the end of the piston cylinder 8 away from the exhaust pipe 7, and the diameter of the exhaust hole 13 is less than the diameter of the exhaust pipe 7, so that the piston 10 can slide completely to the side of the exhaust hole 13, so that the airflow can be discharged through the exhaust hole 13, and the air pressure can be released.

[0024] The following steps are required when using this road maintenance vehicle equipped with a rear airbag: 1) By contacting the rear-end collision vehicle through the protective frame 4, the impact is evenly applied to the buffer airbag 6. Through the energy absorption of the compression of the buffer spring 5 and the elastic compression of the buffer airbag 6, the impact force can be gradually weakened. 2) After the buffer airbag 6 is compressed, the gas is squeezed into the inner wall of the piston cylinder 8, thereby pushing the piston 10 by the air pressure. At the same time, the thrust spring 12 pushes the support, limiting its sliding speed and achieving buffering. 3) It slows down the compression speed of the airbag 6, and at the same time, after pushing the piston 10 to slide to the side of the exhaust port 13, the gas can be discharged through the exhaust port 13, thereby weakening the pressure of the airbag 6 and preventing the internal pressure from being too high and causing it to burst. At the same time, the impact basically stops, and the discharged airflow can reduce the reaction force of the air pressure and reduce the reverse push on the vehicle.

[0025] In summary, by having the protective frame 4 contact the rear-end collision vehicle, the impact is evenly applied to the buffer airbag 6. Through the energy absorption of the compression of the buffer spring 5 and the elastic compression of the buffer airbag 6, the impact force can be gradually weakened, the impact speed can be reduced, buffer protection can be achieved, the protective effect can be improved, the damage from rear-end collisions can be reduced, and the damage to the driver of the following vehicle can be reduced. After the buffer airbag 6 is compressed, the gas is squeezed into the inner wall of the piston cylinder 8, thereby causing the air pressure to push the piston 10. At the same time, the thrust spring 12 pushes the support, limiting its sliding speed, thereby achieving buffering and slowing down the compression speed of the buffer airbag 6. At the same time, after pushing the piston 10 to slide to the side of the exhaust port 13, the gas can be discharged through the exhaust port 13, thereby weakening the pressure of the buffer airbag 6 and preventing excessive internal pressure from causing rupture. At this time, the impact basically stops, and the discharged airflow can reduce the reaction force of the air pressure, reduce the reverse thrust on the vehicle, and improve the protective effect.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highway maintenance vehicle equipped with a rear airbag, characterized in that: The vehicle includes a maintenance vehicle body (1). Several guide holes (2) are provided on both sides of the rear surface of the maintenance vehicle body (1). Guide posts (3) are slidably connected to the inner walls of the guide holes (2). A protective frame (4) is fixedly connected to one end of each guide post (3). The protective frame (4) covers the rear of the maintenance vehicle body (1). A buffer airbag (6) is fixedly connected between the side of the protective frame (4) near the maintenance vehicle body (1) and the maintenance vehicle body (1). A buffer spring (5) is sleeved on the outer wall of each guide post (3). The buffer spring (5) is located between the inner wall of the protective frame (4) and the rear of the maintenance vehicle body (1). Piston cylinders (8) are fixedly connected to both sides of the top surface of the maintenance vehicle body (1) near the edge of the buffer airbag (6). Both sides of the top of the side are fixedly connected to exhaust pipes (7). The output ends of the two exhaust pipes (7) are connected to the inside of the piston cylinder (8). The center of the top of the two exhaust pipes (7) is provided with exhaust holes (13). The inner walls of the two exhaust pipes (7) are slidably connected to pistons (10). The center of one side of the piston (10) is fixedly connected to a guide tube (9). The guide tube (9) extends through the outside of the piston cylinder (8). The outer wall of the guide tube (9) is sleeved with a thrust spring (12). The thrust spring (12) is located between the piston (10) and the inner wall of the piston cylinder (8). The center of the piston (10) is fixedly connected to a one-way valve (11) that opens to the inside of the piston cylinder (8). The guide tube (9) is connected to the inside of the piston cylinder (8) through the one-way valve (11).

2. The highway maintenance vehicle with a rear airbag according to claim 1, characterized in that: The depth of several guide holes (2) is greater than the length of the guide post (3), the thickness of the buffer airbag (6) when fully expanded is less than the length of the guide post (3), and the length of the buffer spring (5) after fully resetting is adapted to the thickness of the buffer airbag (6) when fully expanded.

3. The highway maintenance vehicle with a rear airbag according to claim 2, characterized in that: The top of the buffer airbag (6) is higher than the top surface of the maintenance vehicle body (1), the bottom of the buffer airbag (6) corresponds to the bottom surface of the maintenance vehicle body (1), and the exhaust pipe (7) is located at the part of the buffer airbag (6) that is higher than the top surface of the maintenance vehicle body (1).

4. The highway maintenance vehicle with a rear airbag according to claim 3, characterized in that: The length of the guide tube (9) is greater than the length of the piston cylinder (8), and the length of the thrust spring (12) after reset is adapted to the length of the piston cylinder (8).

5. The highway maintenance vehicle with a rear airbag according to claim 4, characterized in that: The thickness of the piston (10) is less than the distance from the exhaust hole (13) to the end of the piston cylinder (8) away from the exhaust pipe (7), and the diameter of the exhaust hole (13) is less than the diameter of the exhaust pipe (7).

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