Active safety belt motor pretensioner

Abstract

The utility model relates to the technical field of active safety belts, in particular to an active safety belt motor pretensioner which comprises an installation base and a furling assembly, a connecting piece is arranged on one side of the installation base, a supporting piece is arranged on the connecting piece, a threaded column is arranged on the supporting piece, the threaded column is arranged in a threaded hole of a transmission piece, and the furling assembly is arranged in the threaded hole of the transmission piece. A transmission assembly is arranged on the transmission part, a conduction part is arranged on the transmission assembly, the threaded column, the transmission part and the conduction part are coaxially arranged, the winding assembly is arranged on the connecting part, and the winding assembly and the conduction part are coaxially arranged and connected in a matched mode; the driving assembly is arranged on the supporting piece, and the driving assembly is used for driving the transmission piece to rotate; and the response speed is high, and the pre-tightening effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of active safety belts, in particular to an active safety belt motor pretensioner. Background Art

[0002] Although the traditional passive seat belt system can basically protect the occupants from being thrown out of their seats when the vehicle is hit, the occupants may still move forward significantly under the high impact force, causing the chest or head to hit the steering wheel or dashboard, causing serious injuries. In recent years, the introduction of active seat belt pre-tensioning technology effectively restrains the occupants by pre-tightening the seat belts before a collision occurs, significantly reducing the occupants' forward displacement, thereby reducing collision injuries;

[0003] However, existing active seat belt pretensioner designs face some technical challenges, mainly in terms of response speed. For example, some systems have a long response time and cannot be activated immediately at the moment of emergency braking or collision, which reduces the effectiveness of the pretensioner. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an active seat belt motor pretensioner with fast response speed and good pretensioning effect.

[0005] The utility model discloses an active seat belt motor pretensioner, comprising:

[0006] An installation base and a winding assembly, a connecting piece is arranged on one side of the installation base, a supporting piece is arranged on the connecting piece, a threaded column is arranged on the supporting piece, the threaded column is arranged inside the threaded hole of the transmission piece, a transmission assembly is arranged on the transmission piece, a conducting piece is arranged on the transmission assembly, the threaded column, the transmission piece and the conducting piece are arranged coaxially, the winding assembly is arranged on the connecting piece, and the winding assembly and the conducting piece are arranged coaxially and matched and connected;

[0007] The driving assembly is arranged on the supporting member and is used for driving the transmission member to rotate.

[0008] Furthermore, the retracting assembly includes a support shaft arranged in the shaft hole of the connecting member, the middle part of the support shaft is coaxially arranged on the clamping member, an inner groove is arranged on one side of the clamping member, and threaded rods are respectively arranged at multiple groups of threaded holes in the inner groove, a fixing member is arranged on the threaded rod, the fixing member is located in the inner groove of the clamping member and is used to fix the seat belt, a driving groove is arranged on the support shaft, and the conductive member is plug-in connected with the driving groove of the support shaft.

[0009] Preferably, the winding assembly includes an auxiliary part arranged on the mounting base, the other end of the support shaft is arranged at the through hole of the auxiliary part, a coil spring is arranged on the support shaft, and the other end of the coil spring is arranged on the wall of the auxiliary part groove.

[0010] Furthermore, the transmission assembly includes a moving part arranged in the cavity of the transmission part, a conductive part arranged on the moving part, a first spring arranged on the moving part, the other end of the first spring is arranged on the cavity wall of the transmission part, a second spring is arranged on the transmission part, and the other end of the second spring is arranged on the connecting part.

[0011] Preferably, the drive assembly includes a servo motor arranged on the support member, the output end of the servo motor is coaxially arranged on the drive shaft, a driving gear is coaxially arranged on the drive shaft, a driven gear is coaxially arranged on the transmission member, and the driving gear and the driven gear are meshingly connected.

[0012] Furthermore, a limiting member is arranged on the connecting member, and the transmission member is arranged inside the through cavity of the limiting member.

[0013] Preferably, a protective member is provided on the mounting base, the protective member is cooperatively connected with the connecting member and the auxiliary member, the clamping member is provided inside the protective member, and a notch is provided on the protective member for the safety belt to pass through.

[0014] Furthermore, extension pieces are symmetrically arranged at both ends of the mounting base, and a plurality of groups of long slot holes are arranged on the extension pieces.

[0015] Preferably, an isolating member is provided on the connecting member, and the driving assembly is located inside the isolating member.

[0016] Furthermore, the output end of the drive shaft is cooperatively arranged inside the mounting hole of the connecting member.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the drive component is directly installed on the support member, close to the reeling component. This layout ensures the instant transmission of the drive signal, instantly responds to emergency braking or collision situations, immediately triggers the drive component to start, and realizes rapid pre-tightening of the seat belt, effectively shortens the response time of the seat belt, and improves the safety of the occupants in emergency situations. The design of the coaxial linear arrangement of the threaded column, the transmission member and the conductive member ensures direct and efficient power transmission, reduces energy loss, and makes the transmission of the pre-tightening force more accurate and rapid, ensuring the stability and effectiveness of the seat belt pre-tightening process, and further enhancing the protection effect on the occupants. The drive component drives the transmission member to rotate and cooperates with the threaded column to adjust the distance between the conductive member and the reeling component, which is convenient for plugging, unplugging, disassembling and connecting. This structural design allows the seat belt to be freely stretched in a non-pre-tightened state. The transmission component is used for buffering when the conductive member contacts the reeling component, with fast response speed and good pre-tightening effect. 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 schematic diagram of the internal structure of the utility model;

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

[0022] Markings in the accompanying drawings: 1. Mounting base; 2. Connecting part; 3. Supporting part; 4. Threaded column; 5. Transmission part; 6. Conducting part; 7. Support shaft; 8. Clamping part; 9. Threaded rod; 10. Fixing part; 11. Auxiliary part; 12. Coil spring; 13. Moving part; 14. First spring; 15. Second spring; 16. Servo motor; 17. Driving shaft; 18. Driving gear; 19. Driven gear; 20. Limiting part; 21. Protective part; 22. Extension part; 23. Isolation part. 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, an active seat belt motor pretensioner of the utility model comprises:

[0025] An installation base 1 and a winding assembly, a connecting member 2 is provided on one side of the installation base 1, a supporting member 3 is provided on the connecting member 2, a threaded column 4 is provided on the supporting member 3, the threaded column 4 is provided inside the threaded hole of the transmission member 5, a transmission assembly is provided on the transmission member 5, a conducting member 6 is provided on the transmission assembly, the threaded column 4, the transmission member 5, and the conducting member 6 are coaxially arranged, the winding assembly is provided on the connecting member 2, and the winding assembly and the conducting member 6 are coaxially arranged and matched and connected;

[0026] The driving assembly is arranged on the support member 3, and the driving assembly is used to drive the transmission member 5 to rotate; the driving assembly is directly installed on the support member 3, close to the reeling assembly. This layout ensures the instant transmission of the driving signal, instantly responds to emergency braking or collision conditions, and immediately triggers the driving assembly to start, so as to achieve rapid pre-tightening of the seat belt, effectively shorten the response time of the seat belt, and improve the safety of the occupants in emergency situations. The design of the coaxial linear arrangement of the threaded column 4, the transmission member 5 and the conductive member 6 ensures direct and efficient power transmission, reduces energy loss, and makes the transmission of the pre-tightening force more accurate and rapid, ensuring the stability and effectiveness of the seat belt pre-tightening process, and further enhancing the protection effect on the occupants. The driving assembly drives the transmission member 5 to rotate and cooperates with the threaded column 4 to adjust the distance between the conductive member 6 and the reeling assembly, which is convenient for plugging, unplugging, disassembling and connecting. This structural design allows the seat belt to be freely stretched in a non-pre-tightened state. The transmission assembly is used for buffering when the conductive member 6 contacts the reeling assembly, with fast response speed and good pre-tightening effect.

[0027] like Figures 1 to 4 As shown, as a preferred solution, the retracting assembly includes a support shaft 7 rotatably arranged in the shaft hole of the connecting member 2, the middle part of the support shaft 7 is coaxially arranged on the clamping member 8, an inner groove is arranged on one side of the clamping member 8, and threaded rods 9 are respectively arranged at multiple groups of threaded holes in the inner groove, and a fixing member 10 is arranged on the threaded rod 9, and the fixing member 10 is located in the inner groove of the clamping member 8 for fixing the safety belt, and a driving groove is arranged on the support shaft 7, and the conductive member 6 is plug-in-connected with the driving groove of the support shaft 7;

[0028] The reeling assembly includes an auxiliary member 11 arranged on the mounting base 1, the other end of the support shaft 7 is arranged at the through hole of the auxiliary member 11, a coil spring 12 is arranged on the support shaft 7, and the other end of the coil spring 12 is arranged on the groove wall of the auxiliary member 11; the rotation setting of the support shaft 7 directly with the shaft hole of the connecting member 2, and the matching design of the transmission member 6 and the driving groove of the support shaft 7 ensure that when the emergency braking or collision signal is triggered, the driving assembly can respond immediately and quickly drive the transmission member 6 to move, thereby quickly pre-tightening the seat belt, greatly shortening the response time of the seat belt, and improving the safety protection efficiency of the occupant in crisis situations. The combination of the threaded rod 9 and the fixing member 10, through the ingenious design of the clamping member 8, It not only achieves effective fixation of the seat belt, but also ensures efficient and lossless power transmission during the pre-tensioning process, reduces energy loss, makes the control of the pre-tensioning force more precise and rapid, ensures the stability of the seat belt pre-tensioning, and further enhances the protection effect on the occupants. The plug-in connection design of the drive groove on the support shaft 7 and the conductive part 6 facilitates installation and disassembly operations, so that the seat belt can be freely stretched in the non-pre-tensioned state, simplifies the maintenance process, and improves the system's usability and convenience in daily use. The coil spring 12 arranged on the support shaft 7 provides a reset and rewinding power after the seat belt is pulled out. The auxiliary part 11 is connected to the through hole of the support shaft 7 to increase the working strength of the support shaft 7.

[0029] like Figures 1 to 4 As shown, as a preferred solution, the transmission assembly includes a moving member 13 arranged in the cavity of the transmission member 5, the conductive member 6 is arranged on the moving member 13, a first spring 14 is arranged on the moving member 13, the other end of the first spring 14 is arranged on the cavity wall of the transmission member 5, a second spring 15 is arranged on the transmission member 5, and the other end of the second spring 15 is arranged on the connecting member 2; the conductive member 6 and the transmission member 5 are positioned and slidably connected through the moving member 13, and a reset power is provided after the moving member 13 is moved by the first spring 14. At the same time, the first spring 14 ensures that the conductive member 6 is buffered when it contacts the support shaft 7 to prevent damage to the device due to impact, and the second spring 15 is used to make the transmission member 5 rotate and cooperate with the threaded column 4 to drive the conductive member 6 to move and provide a reset driving force after the position is moved, thereby ensuring that the transmission member 5 and the threaded column 4 are stably matched.

[0030] like Figures 1 to 4As shown, as a preferred solution, the drive assembly includes a servo motor 16 arranged on the support member 3, the output end of the servo motor 16 is coaxially arranged on the drive shaft 17, the driving gear 18 is coaxially arranged on the drive shaft 17, and the driven gear 19 is coaxially arranged on the transmission member 5. The driving gear 18 and the driven gear 19 are meshed and connected, and the output end of the drive shaft 17 is matched and arranged inside the mounting hole of the connecting member 2. The connecting member 2 is provided with an isolating member 23, and the drive assembly is located inside the isolating member 23; the use of the servo motor 16 is directly installed on the support member 3, and through its high precision and fast response characteristics, it ensures that the emergency brake or collision signal responds immediately once it is triggered, and quickly drives the seat belt to be pre-tightened, which significantly shortens the seat belt. The response time is improved, which improves the safety level of the occupants in emergency situations. The coaxial design of the servo motor 16 output shaft and the drive shaft 17, through the precise meshing transmission of the active gear 18 and the driven gear 19, constructs an efficient and stable power transmission system. This design reduces energy loss, improves the accuracy and stability of the preload process, and further strengthens the protection of the occupants. The drive assembly is integrated inside the isolation member 23, which not only optimizes the spatial layout, but also effectively isolates the external environment from interfering with the motor, protects the precision components from external factors, and improves the overall durability. At the same time, through the cooperation of the drive shaft 17 and the mounting hole of the connector 2, a stable mechanical connection is achieved, ensuring the stability of the system.

[0031] like Figures 1 to 4 As shown, as a preferred solution, a limit member 20 is provided on the connecting member 2, and the transmission member 5 is provided inside the through cavity of the limit member 20; the limit member 20 is used to ensure the concentricity of the transmission member 5 when it rotates and moves, preventing shaking from affecting the device.

[0032] like Figures 1 to 4 As shown, as a preferred solution, a protective member 21 is provided on the mounting base 1, the protective member 21 is connected with the connecting member 2 and the auxiliary member 11, the clamping member 8 is provided inside the protective member 21, and a slot is provided on the protective member 21 for the seat belt to pass through; the protective member 21 effectively wraps the clamping member 8, isolates it from external impact and environmental factors, reduces the risk of accidental damage, ensures the stable operation of the system, and indirectly improves the safety of the occupants.

[0033] like Figures 1 to 4 As shown, as a preferred solution, extension pieces 22 are symmetrically arranged at both ends of the mounting base 1, and a plurality of groups of long slot holes are arranged on the extension pieces 22; the plurality of groups of slot holes designed on the extension pieces 22 provide a variety of installation options for the installation of the device, and the most suitable hole positions can be flexibly selected according to different vehicle structures or installation positions, which greatly improves the versatility and adaptability of the system and facilitates rapid deployment on different vehicle models.

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

[0035] When the vehicle encounters emergency braking or collision, the on-board sensor detects the abnormal state, immediately sends a signal to the servo motor 16 and responds quickly. The servo motor 16 transmits power to the transmission member 5 efficiently and stably through the precision transmission system composed of the drive shaft 17, the driving gear 18, and the driven gear 19. The transmission member 5, with the cooperation of the threaded column 4, drives the conductive member 6 to move toward the support shaft 7. The conductive member 6 cooperates with the driving groove of the support shaft 7 to drive the clamping member 8 to rotate. The clamping member 8 rotates to pull and pre-tighten the seat belt.

[0036] The utility model provides an active seat belt motor pretensioner, and its installation method, connection method or setting method 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 seat belt motor pretensioner, characterized in that: include: An installation base and a reeling assembly, wherein a connecting piece is provided on one side of the installation base, a supporting piece is provided on the connecting piece, a threaded column is provided on the supporting piece, the threaded column is provided inside the threaded hole of the transmission piece, a transmission assembly is provided on the transmission piece, a conducting piece is provided on the transmission assembly, the threaded column, the transmission piece and the conducting piece are coaxially arranged, the reeling assembly is arranged on the connecting piece, and the reeling assembly and the conducting piece are coaxially arranged and cooperatively connected; A driving assembly is arranged on the supporting member, and is used for driving the transmission member to rotate.

2. An active seat belt motor pretensioner according to claim 1, characterized in that: The retracting assembly includes a support shaft arranged in the shaft hole of the connecting member, the middle part of the support shaft is coaxially arranged on the clamping member, an inner groove is arranged on one side of the clamping member, and threaded rods are respectively arranged at multiple groups of threaded holes in the inner groove, a fixing member is arranged on the threaded rod, and the fixing member is located in the inner groove of the clamping member and is used to fix the seat belt, a driving groove is arranged on the support shaft, and the conductive member is plug-in-connected with the driving groove of the support shaft.

3. An active seat belt motor pretensioner as claimed in claim 2, characterized in that: The reeling assembly comprises an auxiliary part arranged on a mounting base, the other end of the support shaft is arranged at a through hole of the auxiliary part, a coil spring is arranged on the support shaft, and the other end of the coil spring is arranged on a groove cavity wall of the auxiliary part.

4. An active seat belt motor pretensioner as claimed in claim 1, characterized in that: The transmission assembly includes a moving part arranged in the cavity of the transmission part, the conductive part is arranged on the moving part, a first spring is arranged on the moving part, the other end of the first spring is arranged on the cavity wall of the transmission part, a second spring is arranged on the transmission part, and the other end of the second spring is arranged on the connecting part.

5. The active seat belt motor pretensioner according to claim 1, characterized in that: The driving assembly includes a servo motor arranged on a supporting member, wherein an output end of the servo motor is coaxially arranged on a driving shaft, a driving gear is coaxially arranged on the driving shaft, a driven gear is coaxially arranged on the transmission member, and the driving gear is meshed and transmission-connected with the driven gear.

6. An active seat belt motor pretensioner according to claim 1, characterized in that: A limiting member is arranged on the connecting member, and the transmission member is arranged inside the through cavity of the limiting member.

7. An active seat belt motor pretensioner as claimed in claim 2, characterized in that: The mounting base is provided with a protective member, the protective member is cooperatively connected with the connecting member and the auxiliary member, the clamping member is arranged inside the protective member, and the protective member is provided with a notch for the safety belt to pass through.

8. An active seat belt motor pretensioner as claimed in claim 1, characterized in that: Extension pieces are symmetrically arranged at both ends of the installation base, and a plurality of groups of long slot holes are arranged on the extension pieces.

9. An active seat belt motor pretensioner as claimed in claim 5, characterized in that: An isolating piece is arranged on the connecting piece, and the driving assembly is located inside the isolating piece.

10. An active seat belt motor pretensioner as claimed in claim 5, characterized in that: The output end of the driving shaft is arranged in cooperation with the interior of the connecting member installation hole.

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