Active pre-tightening device of automobile safety belt

Abstract

The utility model relates to the technical field of automobile safety belts, in particular to an active pre-tightening device of an automobile safety belt, which comprises a tensioner body and a connecting component, through grooves are arranged at two ends of the tensioner body, a sealing piece is arranged at the through groove at the bottom end of the tensioner body, a connecting seat is arranged on the sealing piece, a moving piece is arranged in the tensioner body, and the connecting seat is arranged on the moving piece. An igniter is arranged at one end of the moving part and is in electric control connection with the connecting seat through a wire, a gunpowder bag is arranged at the other end of the moving part and is in matched connection with the igniter, a blocking part is arranged at a through groove in the top end of the tensioner body, the connecting assembly is arranged on the moving part and is externally connected with a safety belt socket, and the connecting seat is connected with an automobile computer. The tensioner body is arranged on the mounting assembly; and the response speed is high.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile safety belts, in particular to an active pre-tightening device for automobile safety belts. Background Art

[0002] In the field of modern automobile safety technology, automobile seat belts, as basic passive safety devices, play a vital role in protecting passengers from traffic accidents. However, when a traditional seat belt encounters a sudden collision, due to the inertia of the human body, the passenger will still have a large forward displacement, which may cause the seat belt to exert excessive load on the human body, increasing the risk of injury to the chest, neck and other parts. In order to solve this problem, active seat belt pre-tensioning technology came into being. Its basic principle is to tighten the seat belt in advance at the moment of collision, thereby reducing the forward distance of the passenger, effectively alleviating the impact of the collision, and greatly improving the safety of the passenger.

[0003] Although existing active seat belt pretensioners have been developed to a certain extent, such as the use of motor drive, hydraulic or pneumatic systems and other technical means, these solutions generally have problems such as insufficient response speed. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an active pre-tightening device for automobile safety belts with fast response speed.

[0005] The utility model discloses an active pre-tightening device for automobile safety belts, comprising:

[0006] A tensioner body and a connecting assembly, both ends of the tensioner body are provided with through grooves, a sealing member is provided at the through groove at the bottom end of the tensioner body, a connecting seat is provided on the sealing member, a moving member is provided inside the tensioner body, an igniter is provided at one end of the moving member, the igniter and the connecting seat are connected by wire electrical control, a gunpowder bag is provided at the other end of the moving member, the gunpowder bag is connected with the igniter, a blocking member is provided at the through groove at the top end of the tensioner body, the connecting assembly is provided on the moving member, the connecting assembly is externally connected to the seat belt socket, and the connecting seat is connected to the car computer;

[0007] The mounting assembly is provided on which the tensioner body is arranged.

[0008] Furthermore, the connecting component includes a connecting part arranged on the moving part, the gunpowder bag is arranged inside the connecting part, a plurality of exhaust holes are arranged on the connecting part, a traction rope is arranged on the connecting part, the traction rope passes through the through hole of the barrier part, the guide rope is externally connected to the seat belt socket, and a limiting component is arranged on the connecting part.

[0009] Preferably, the limiting assembly includes a limiting member arranged on the connecting member, the limiting member is arranged as a conical structure, a positioning member is arranged on the limiting member, a ball is arranged inside the tensioner body, and the ball is located in the middle of the conical structure of the positioning member and the limiting member.

[0010] Furthermore, a transmission member is provided on the tensioner body, a plurality of supporting members are provided on the transmission member, a clamping wheel is provided on the supporting member, a guide groove is provided on the clamping wheel, and the traction rope is located inside the plurality of guide grooves.

[0011] Preferably, a sealing plug is provided at the connection between the traction rope and the through hole of the barrier member.

[0012] Furthermore, the mounting assembly includes a fixing member arranged on the tensioner body, a plurality of groups of mounting legs are equidistantly arranged on the fixing member, mounting feet are arranged on the mounting legs, and mounting holes are arranged on the mounting feet.

[0013] Preferably, an auxiliary part is provided on the tensioner body, a plurality of groups of support beams are provided on the auxiliary part, support feet are provided on the support beams, and long slot holes are provided on the support feet.

[0014] Furthermore, a plurality of sets of fixing grooves are arranged on the moving part, piston rings are arranged in the fixing grooves of the moving part, and the plurality of sets of piston rings are connected to the inner cavity wall of the tensioner body.

[0015] Preferably, a plurality of groups of stepped grooves are arranged inside the tensioner body.

[0016] Further, the transmission member is rotatably connected to the tensioner body.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the core of the device lies in the integrated design of the igniter and the gunpowder bag. Once the car collision sensor detects an emergency braking or collision signal, the car computer immediately activates the igniter through the wire, instantly ignites the gunpowder bag, and the thrust generated quickly pushes the moving part, thereby pre-tightening the seat belt. This series of actions is completed almost instantly when the collision occurs, significantly reducing the forward distance of the occupants and effectively protecting the occupants from secondary collision injuries. The gunpowder bag is ignited by the blocking piece to form a closed space, thereby pushing the moving part to move. The sealing piece makes the device easy to assemble. The design of the connecting component directly connected to the seat belt socket and the direct connection with the car computer enables the seat belt pretensioning device to be integrated into the overall safety management system of the vehicle, realizing intelligent control and fast response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the axonometric structure of the utility model;

[0020] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0022] Markings in the attached drawings: 1. tensioner body; 2. sealing member; 3. connecting seat; 4. moving member; 5. igniter; 6. wire; 7. gunpowder bag; 8. barrier member; 9. connecting member; 10. traction rope; 11. limit member; 12. positioning member; 13. ball bearing; 14. transmission member; 15. supporting member; 16. clamping wheel; 17. sealing plug; 18. fixing member; 19. mounting leg; 20. mounting foot; 21. auxiliary member; 22. supporting beam; 23. supporting foot; 24. piston ring; 25. step groove. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] like Figures 1 to 4 As shown, the active pre-tensioning device for automobile safety belts of the utility model comprises:

[0025] A tensioner body 1 and a connecting assembly, both ends of the tensioner body 1 are provided with through grooves, a sealing member 2 is provided at the through groove at the bottom end of the tensioner body 1, the sealing member 2 is threadedly connected to the tensioner body 1, a connecting seat 3 is provided on the sealing member 2, a moving member 4 is slidably provided inside the tensioner body 1, an igniter 5 is provided at one end of the moving member 4, the igniter 5 and the connecting seat 3 are electrically controlled and connected through a wire 6, a gunpowder bag 7 is provided at the other end of the moving member 4, the gunpowder bag 7 is connected to the igniter 5, a blocking member 8 is provided at the through groove at the top end of the tensioner body 1, the blocking member 8 is threadedly connected to the tensioner body 1, the connecting assembly is provided on the moving member 4, the connecting assembly is externally connected to the seat belt socket, and the connecting seat 3 is connected to the car computer;

[0026] The installation component, the tensioner body 1 is arranged on the installation component; the core of the device lies in the integrated design of the igniter 5 and the gunpowder bag 7. Once the car collision sensor detects an emergency braking or collision signal, the car computer immediately activates the igniter 5 through the wire 6, instantly ignites the gunpowder bag 7, and the thrust generated quickly pushes the moving part 4, thereby pre-tightening the seat belt. This series of actions is completed almost at the moment of the collision, significantly reducing the forward distance of the occupant and effectively protecting the occupant from secondary collision injuries. The gunpowder bag 7 is ignited by the blocking member 8 to form a closed space, thereby pushing the moving part 4 to move. The sealing member 2 makes the device easy to assemble. The design of the connecting component directly connected to the seat belt socket and the direct connection with the car computer enables the seat belt pretensioner to be integrated into the overall safety management system of the vehicle, realizing intelligent control and fast response speed.

[0027] like Figures 1 to 4 As shown, as a preferred solution, the connecting component includes a connecting member 9 arranged on the moving member 4, the gunpowder bag 7 is arranged inside the connecting member 9, a plurality of exhaust holes are arranged on the connecting member 9, a traction rope 10 is arranged on the connecting member 9, the traction rope 10 passes through the through hole of the barrier member 8, the traction rope 10 is externally connected to the seat belt socket, and a limiting component is arranged on the connecting member 9; the traction rope 10 is fixedly installed on the moving member 4 through the connecting member 9, the traction rope 10 is driven by the moving member 4 to move to tighten the seat belt, the traction rope 10 directly passes through the through hole of the barrier member 8 and is connected to the seat belt socket, and this design simplifies the seat belt The connection structure with the pre-tensioning device reduces the possible failure points caused by the intermediate links and improves the reliability of the system. In an emergency, the traction rope can quickly respond to the displacement of the moving part 4, realize the rapid pre-tensioning of the seat belt, and effectively protect the occupants. The limit assembly added to the connecting part 9 can provide a reliable limiting effect when the moving part 4 reaches the predetermined position to prevent the moving part 4 from rebounding and resetting. The gunpowder bag 7 is integrated into the connecting part 9, and the exhaust hole, traction rope interface and limit assembly are integrated on the connecting part 9. This makes the entire pre-tensioning device more compact and modular, which is convenient for production and assembly.

[0028] like Figures 1 to 4As shown, as a preferred solution, further, the limiting assembly includes a limiting member 11 arranged on the connecting member 9, the limiting member 11 is set as a conical structure, a positioning member 12 is arranged on the limiting member 11, a ball 13 is arranged inside the tensioner body 1, the ball 13 is located in the middle of the conical structure of the positioning member 12 and the limiting member 11, and a plurality of groups of stepped grooves 25 are arranged inside the tensioner body 1; the combination of the conical structure of the limiting member 11 and the positioning member 12, and the ingenious layout of the ball 13 form a precise The efficient limiting mechanism, when the movable part 4 is pushed to the predetermined position by the thrust generated by the ignition of the gunpowder bag 7, the interaction between the conical limiting part 11, the ball 13 and the stepped groove 25 can ensure that the movable part 4 stops at a precise position, avoiding the rebound and reset of the seat belt, ensuring the proper pre-tightening effect, and protecting the occupants from injury. The design of the conical limiting part 11 and the positioning part 12 can limit the movable range of the ball 13, and the design of the stepped groove 25 can make the movable part 4 move only in one direction.

[0029] like Figures 1 to 4 As shown, as a preferred solution, a transmission member 14 is provided on the tensioner body 1, and multiple groups of support members 15 are provided on the transmission member 14. A clamping wheel 16 is rotatably provided on the support member 15, and a guide groove is provided on the clamping wheel 16. The traction rope 10 is located inside the multiple groups of guide grooves, and the transmission member 14 is rotatably connected to the tensioner body 1; the multiple groups of support members 15 are rotatably installed on the tensioner body 1 through the transmission member 14, and the clamping wheel 16 is rotatably supported on the transmission member 14 through the support member 15. The traction rope 10 is supported by the cooperation of the multiple groups of clamping wheels to facilitate the rotation of the traction force, and at the same time, it is ensured that the traction rope 10 is in vertical movement when passing through the through hole of the baffle 8, and the traction rope 10 is convenient for multi-directional traction through the cooperation of the multiple groups of clamping wheels. At the same time, the traction rope 10 is stably supported by the clamping wheel 16 when the transmission member 14 is rotatably installed.

[0030] like Figures 1 to 4 As shown, as a preferred solution, a sealing plug 17 is provided at the connection between the traction rope 10 and the through hole of the baffle 8; the setting of the sealing plug 17 effectively prevents external pollutants such as dust and moisture from entering the interior of the tensioner body, and protects internal precision parts, such as the igniter 5, the gunpowder bag 7 and other key components from being affected by environmental factors, thereby enhancing the reliability and safety of the entire pretensioning device, extending its service life, and preventing energy leakage after the gunpowder bag 7 is ignited, causing loss of driving force of the moving part 4, etc.

[0031] like Figures 1 to 4As shown, as a preferred solution, the mounting assembly includes a fixing member 18 disposed on the tensioner body 1, a plurality of groups of mounting legs 19 are equidistantly disposed on the fixing member 18, a mounting foot 20 is disposed on the mounting leg 19, and a mounting hole is disposed on the mounting foot 20; the integration of the fixing member 18 with the tensioner body 1 and the plurality of groups of mounting legs 19 equidistantly distributed provide a solid mounting foundation for the device, ensuring stable fixation of the tensioner on the vehicle, and the mounting holes disposed on the mounting foot 20 standardize and simplify the installation process.

[0032] like Figures 1 to 4 As shown, as a preferred solution, an auxiliary part 21 is slidably arranged on the tensioner body 1, and a plurality of groups of support beams 22 are arranged on the auxiliary part 21, and support feet 23 are arranged on the support beams 22, and long slot holes are arranged on the support feet 23; the auxiliary part 21 significantly enhances the overall stability of the tensioner and its ability to withstand dynamic loads during the pre-tightening process through the structural layout of the plurality of groups of support beams 22 and support feet 23, and the arrangement of the support beams 22 and the support feet 23 increases the installation adaptability through the long slot holes on the support feet 23.

[0033] like Figures 1 to 4 As shown, as a preferred solution, multiple groups of fixed grooves are provided on the moving part 4, piston rings 24 are provided in the fixed grooves of the moving part 4, and the multiple groups of piston rings 24 are slidably connected with the inner cavity wall of the tensioner body 1; the piston rings 24 serve as sliding contact elements between the moving part 4 and the inner cavity wall of the tensioner body 1, and their material is usually selected from wear-resistant materials to prevent energy loss after the gunpowder bag 7 is ignited, thereby ensuring that a stable moving force is provided for the moving part 4.

[0034] like Figures 1 to 4 As shown, as a preferred solution, its working process is as follows:

[0035] Under normal driving conditions, the active pretensioning device for automobile seat belts of the utility model is in a standby state, all components are in the initial position, and the seat belts are kept in a normal relaxed state to ensure the comfort of the occupants. Once the collision sensor of the vehicle detects an emergency braking or collision signal, the automobile computer responds immediately, and sends an electrical signal to the igniter 5 through the connecting seat 3 via the wire 6, instantly activating the igniter 5 to ignite the gunpowder bag 7. The huge thrust generated by the combustion of the gunpowder bag 7 is quickly transmitted through the moving part 4, and the moving part 4 moves forward along the sliding track inside the tensioner body 1. The movement of the moving part 4 is transmitted through the traction rope 10. As the moving part 4 moves forward, the traction rope 10 is tightened synchronously, and the seat belt is quickly pulled to achieve pretensioning of the occupants, significantly reduce the forward rush distance of the occupants at the moment of collision, and effectively prevent secondary collision injuries.

[0036] The installation method, connection method or setting method of the active pretensioning device for automobile safety belts of the utility model are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An active pretensioning device for a car seat belt, characterized in that: include: A tensioner body and a connecting assembly, wherein both ends of the tensioner body are provided with through grooves, a sealing member is provided at the through groove at the bottom end of the tensioner body, a connecting seat is provided on the sealing member, a moving member is provided inside the tensioner body, an igniter is provided at one end of the moving member, the igniter and the connecting seat are connected by wire electrical control, a gunpowder bag is provided at the other end of the moving member, the gunpowder bag is connected with the igniter, a blocking member is provided at the through groove at the top end of the tensioner body, the connecting assembly is provided on the moving member, the connecting assembly is externally connected to the seat belt socket, and the connecting seat is connected to the car computer; The tensioner body is mounted on the mounting assembly.

2. The active pretensioning device for automobile safety belts according to claim 1, characterized in that: The connecting component includes a connecting part arranged on the moving part, the gunpowder bag is arranged inside the connecting part, a plurality of exhaust holes are arranged on the connecting part, a traction rope is arranged on the connecting part, the traction rope passes through the through hole of the blocking part, the guide rope is externally connected to the seat belt socket, and a limiting component is arranged on the connecting part.

3. The active pretensioning device for automobile safety belts according to claim 2, characterized in that: The limiting assembly includes a limiting member arranged on the connecting member, the limiting member is arranged as a conical structure, a positioning member is arranged on the limiting member, a ball is arranged inside the tensioner body, and the ball is located in the middle of the positioning member and the conical structure of the limiting member.

4. The active pretensioning device for automobile safety belts according to claim 2, characterized in that: The tensioner body is provided with a transmission member, the transmission member is provided with multiple groups of support members, the support member is provided with a clamping wheel, the clamping wheel is provided with a guide groove, and the traction rope is located inside the multiple groups of guide grooves.

5. The active pretensioning device for automobile safety belts as claimed in claim 2, characterized in that: A sealing plug is provided at the connection between the traction rope and the through hole of the barrier member.

6. The active pretensioning device for automobile safety belts according to claim 1, characterized in that: The mounting assembly comprises a fixing member arranged on the tensioner body, a plurality of groups of mounting legs are arranged on the fixing member at equal intervals, the mounting legs are provided with mounting feet, and the mounting feet are provided with mounting holes.

7. The active pretensioning device for automobile safety belts according to claim 1, characterized in that: The tensioner body is provided with an auxiliary part, the auxiliary part is provided with a plurality of groups of support beams, the support beams are provided with support feet, and the support feet are provided with long slot holes.

8. The active pretensioning device for automobile safety belts according to claim 1, characterized in that: The movable part is provided with a plurality of fixed grooves, piston rings are arranged in the fixed grooves of the movable part, and the plurality of piston rings are connected to the inner cavity wall of the tensioner body.

9. The active pretensioning device for automobile safety belts according to claim 1, characterized in that: A plurality of stepped grooves are arranged inside the tensioner body.

10. The active pretensioning device for automobile safety belts according to claim 4, characterized in that: The transmission member is rotatably connected to the tensioner body.

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