Modularized safety belt storing and locking assembly

Abstract

The utility model relates to the technical field of vehicle passive safety, in particular to a modularized safety belt containing and locking assembly which comprises a safety belt support and a replaceable coil spring module assembled on the outer side of the safety belt support, the safety belt support comprises a main support, an emergency locking module is arranged on one side of the main support, and the other side of the main support is used for assembling the coil spring module. A reel is arranged in the middle of the main support, the outer side of the reel is connected with a coil spring module through a transmission shaft, sliding blocks capable of automatically moving in the disassembly and assembly state are arranged on the two sides of the transmission shaft, and the transmission shaft is locked after the coil spring module is disassembled. A coil spring and a butt joint shaft are arranged in the coil spring module, the coil spring is safely locked through a locking piece in the disassembling state, a sliding block is driven through a butt joint structure to unlock in the assembling process, reliable butt joint is completed, and the coil spring is made to return to the normal rewinding working state. On the premise that the emergency locking principle of the safety belt is not changed, modular replacement of the coil spring is achieved, the maintenance difficulty is lowered, and the safety and structural reliability in the disassembly and assembly process are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle passive safety technology, concretely is a modular safety belt storage locking assembly. BACKGROUND

[0002] As a key component of the vehicle passive safety system, the retractor of the safety belt usually integrates a reel, a winding spring and an emergency locking mechanism, which is used to realize the automatic recovery of the safety belt during normal driving, and to lock the reel when the vehicle is suddenly decelerated, collides or the safety belt is quickly pulled out, so as to limit the safety belt from being further released and effectively restrain the occupant. The safety belt retractor in the prior art adopts an integrated structure design, that is, the winding spring, the reel transmission structure and part of the locking related structure are integrally arranged in the same shell, and the torque transmission between the winding spring and the reel is realized through the spline connection or equivalent circumferential limiting structure.

[0003] In the above structure, the winding spring is usually in a pre-tightened energy storage state, the inner end of which is connected to the reel or transmission shaft through the spline structure, and the outer end is fixed to the inside of the shell to provide a retraction force after the safety belt is pulled out. Such spline connection structure has the advantages of reliable transmission and strong torsional resistance, and is therefore widely used in safety belt retractors. However, since the winding spring and the retractor body are usually packaged in the same shell, when the winding spring is damaged due to long-term use, elastic attenuation, insufficient retraction force or damage, the entire retractor assembly often needs to be replaced, which has high maintenance cost, and the disassembly process involves the emergency locking mechanism, which may affect the original assembly state and locking performance.

[0004] In addition, in the existing integrated retractor structure, the winding spring disassembly process itself has certain safety risks. Since the winding spring is in a pre-tightened state, if the reel or transmission shaft is not effectively locked during disassembly, sudden rotation may occur, which not only may cause parts misalignment, but also may cause harm to the operator. Therefore, in the prior art, a special tool or additional manual operation steps are usually needed to limit the rotation of the reel, and the disassembly process is complex, which requires high operation standardization of the maintenance personnel.

[0005] Meanwhile, with the increasing intelligence of vehicles, the safety belt system gradually needs to interact with the vehicle control system for information, such as state monitoring, function coordination or fault prompt, which also puts higher requirements on the stability and maintainability of the safety belt retractor structure. Under the above background, how to modularly improve the winding spring structure while maintaining the reliability of the existing spline transmission, emergency locking and other mature technical solutions, and to realize automatic and safe locking and unlocking during disassembly, has become a technical problem to be solved in the field. UTILITY MODEL CONTENTS

[0006] The utility model discloses a modular safety belt storage locking assembly, which is used to solve the problems in the prior art.

[0007] To achieve the above object, the utility model provides the following technical scheme: a modular safety belt storage locking assembly, comprising a safety belt support, the outer side of the safety belt support is equipped with a coil spring module;

[0008] The safety belt support comprises a main support, one side of the main support is equipped with an emergency module for instantaneous tightening and rotation stopping, and the other side of the main support is equipped with a replaceable coil spring module.

[0009] The middle part of the main support is equipped with a reel, the outer side of the reel is provided with a transmission shaft with a convex body, the outer side of the main support and located on both sides of the transmission shaft is provided with oppositely arranged sliding blocks, the sliding blocks are driven to displace inwardly by a spring after the coil spring module is disassembled, and the sliding blocks after displacement can lock the transmission shaft.

[0010] The coil spring module comprises a shell, the inside of the shell is provided with a coil spring, the outer side of the coil spring is clamped with the shell, and the inside of the coil spring is clamped and equipped with a butt joint shaft, the butt joint shaft is rotationally equipped at the center of the shell, the outer side of the shell is provided with a locking piece, the locking piece is inserted into the outside of the shell to lock the butt joint shaft and the shell after the coil spring module is disassembled.

[0011] The inside of the shell is provided with a butt joint pin, the butt joint pin drives the sliding blocks to move outwardly away from each other when the coil spring module is assembled, and the butt joint shaft is sleeved and locked with the transmission shaft, and the locking piece is pulled out in the assembled state.

[0012] Preferably, the outer wall of the main support is provided with a sliding groove outside the transmission shaft hole, the sliding block is slidingly equipped in the inside of the sliding groove, and the spring is equipped between the sliding block and the sliding groove.

[0013] Preferably, the outer side of the emergency module is provided with a car interface.

[0014] Preferably, the outer side of the sliding block is provided with an inclined butt joint groove, the inside of the shell is provided with an inner cover outside the coil spring, the butt joint pin is integrally formed on the outer wall of the inner cover, the butt joint pin is in an inclined shape, and the shape of the butt joint pin is complementary to the shape of the butt joint groove.

[0015] Preferably, the outer side of the butt joint shaft is provided with a clamping groove, the clamping groove is inserted into the center of the coil spring, the outer side of the butt joint shaft is equipped with a butt joint piece, and the center of the butt joint piece is fixedly screwed with the butt joint shaft by a screw.

[0016] Preferably, the outer part of the shell is provided with a locking groove, the inner part of the locking groove is uniformly provided with a clamping tooth, the outer part of the locking member is provided with at least two locking pins, the outer part of the locking pin is provided with a meshing groove corresponding to the shape of the clamping tooth, and the locking member is positioned with the clamping tooth by penetrating the outer part of the butt joint shaft in the disassembled state.

[0017] Preferably, the outer part of the butt joint piece is provided with at least two insertion holes, the locking pin of the locking member penetrates the insertion hole and engages with the clamping tooth inside the locking groove in the locked state.

[0018] Preferably, the outer surface of the butt joint shaft is provided with a protrusion, and the inner wall of the butt joint piece is provided with a corresponding groove, and the butt joint shaft and the butt joint piece are clamped outside the shaft hole of the shell.

[0019] Preferably, the inner part of the locking member is provided with a mounting groove, and the inner part of the mounting groove is provided with a magnetic point.

[0020] Preferably, the outer part of the shell is integrally formed with a storage groove, the inner part of the storage groove is provided with a groove body, and the inner shape of the groove body is the same as the outer shape of the locking member.

[0021] Compared with the prior art, the utility model has the advantages that: the utility model discloses a safety belt retractor, which comprises a shell, a transmission shaft, a safety belt support, a locking member and a winding spring module. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole structure schematic diagram of the utility model.

[0023] Figure 2 It is the winding spring module and safety belt support assembly schematic diagram of the utility model.

[0024] Figure 3 It is another winding spring module and safety belt support assembly schematic diagram of the utility model.

[0025] Figure 4The utility model discloses a spring module disassembling schematic view.

[0026] Figure 5 The utility model discloses a safety belt module locking state schematic view.

[0027] Figure 6 The utility model discloses a spring module and safety belt support are under the cross section schematic view of separation state.

[0028] Figure 7 The utility model discloses a spring module and safety belt support are under the cross section schematic view of combination state.

[0029] In the drawing: 1, safety belt support, 11, main support, 12, car machine interface, 13, emergency module, 14, reel, 15, transmission shaft, 16, sliding slot, 17, sliding block, 18, spring, 19, butt joint groove, 2, spring module, 21, shell, 22, inner cover, 23, spring, 24, locking piece, 25, locking pin, 26, magnetic point, 27, butt joint axle, 28, clamping groove, 29, locking groove, 210, butt joint sheet, 211, jack, 212, screw, 213, butt joint pin, 214, storage groove. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0031] Please refer to Figures 1-7 The utility model provides a kind of technical scheme: a modular safety belt storage locking assembly, including safety belt support 1, the outer side of safety belt support 1 is equipped with spring module 2;

[0032] Safety belt support 1 is used as the installation base and bearing framework of complete safety belt reel, it is usually fixed on vehicle body column reinforcement plate, seat side wall or bottom plate reinforcement beam etc. position, alternating load generated by safety belt pull-out and reel-in needs long-term bearing during working process, and instantaneous peak load generated by occupant restraint is borne when emergency locking, therefore, safety belt support 1 usually has higher structural rigidity and deformation resistance. To meet the strength, durability and assembly consistency requirements, safety belt support 1 can adopt the structural form of metal stamping part plus local reinforcing rib, or adopt the structural form of high-strength die casting and stamping part combination, support surface can be carried out rust-proof coating or electrophoresis treatment, to adapt to the corrosion resistance demand of vehicle interior temperature and humidity change environment and long-term service.

[0033] The coil spring module 2 is arranged outside the safety belt bracket 1 and forms a detachable assembly relationship with the safety belt bracket 1, so that the coil spring energy storage mechanism can be detached from the safety belt body as an independent component. A large number of safety belt retraction devices in the prior art adopt an integrated packaging structure, that is, the coil spring, the coil shaft end connection structure and part of the transmission structure are fixed in the same housing. When the coil spring performance decays or is damaged, the retraction device assembly often has to be replaced as a whole, which is high in maintenance cost and affects the original adjustment state of the emergency locking mechanism during disassembly and assembly. The present scheme arranges the coil spring module 2 on the other side of the main bracket 11 and designs it as a replaceable structure, so that the coil spring related components can be replaced separately, thereby reducing the maintenance cost and improving the maintenance convenience, and reducing the disturbance to the assembly relationship of the main bracket 11 and the emergency module 13, and improving the performance consistency and reliability after maintenance. The housing of the coil spring module 2 can adopt a metal shell or an enhanced engineering plastic shell. The metal shell is beneficial to impact resistance and size stability, and the enhanced engineering plastic shell is beneficial to lightweight and molding consistency. Both of them can meet the structural stability requirements under the temperature cycle and vibration environment in the vehicle.

[0034] The safety belt bracket 1 comprises a main bracket 11, one side of the main bracket 11 is assembled with an emergency module 13 for instantaneous tightening and rotation stopping, and the other side of the main bracket 11 is assembled with a replaceable coil spring module 2.

[0035] The main bracket 11 is a core load-bearing component of the safety belt bracket 1, and its structural role is not only to provide a supporting installation position for the coil shaft 14, but also to provide a relatively stable coaxial reference for the emergency module 13 and the coil spring module 2. The main bracket 11 is provided with the emergency module 13 on one side and the coil spring module 2 on the other side, which belongs to the common side-by-side arrangement idea in the field of safety belt retraction devices. The advantage is that the locking function and the energy storage and retraction function are separated in the structural space, avoiding mutual interference and facilitating assembly and maintenance.

[0036] The emergency module 13 belongs to a mature structure in the prior art for realizing instantaneous tightening and rotation stopping, and its typical engineering characteristics include fast trigger response, reliable locking, resettable under certain conditions, and stable threshold under long-term vibration environment. Common implementation ways of the emergency module 13 can include inertia trigger rotation stopping structure, vehicle posture trigger structure or safety belt pulling acceleration trigger structure, etc., and the core purpose is to quickly limit the rotation of the coil shaft 14 when the vehicle is subjected to sudden deceleration, collision, tendency of rollover or the safety belt is quickly pulled out, so as to avoid the safety belt from being continuously released to cause restraint failure. Since the trigger gap, engagement relationship and friction pair state of the emergency module 13 directly affect the locking reliability, frequent disassembly and assembly during maintenance often causes consistency fluctuation. The present scheme arranges the coil spring module 2 on the other side of the main bracket 11 and designs it as a replaceable structure, so that subsequent maintenance is more concentrated on the side of the coil spring module 2, thereby reducing the disturbance to the locking side mechanism from the structure and improving the stability after maintenance of the whole machine.

[0037] The middle part of the main support 11 is equipped with a reel 14, the outer side of the reel 14 is provided with a transmission shaft 15 with a convex body, the outer side of the main support 11 and on both sides of the transmission shaft 15 are provided with sliding blocks 17 arranged oppositely, the sliding blocks 17 are driven to displace inwardly by springs 18 after the reel spring module 2 is disassembled, and the sliding blocks 17 after displacement can lock the transmission shaft 15;

[0038] The reel spring module 2 comprises an outer shell 21, the inside of the outer shell 21 is provided with a reel spring 23, the outer side of the reel spring 23 is clamped with the outer shell 21, and the inner side of the reel spring 23 is clamped and equipped with a butt joint shaft 27, the butt joint shaft 27 is rotationally equipped at the center of the outer shell 21, the outer side of the outer shell 21 is provided with a locking piece 24, the locking piece 24 is inserted into the outside of the outer shell 21 to lock the butt joint shaft 27 and the outer shell 21 after the reel spring module 2 is disassembled;

[0039] The inside of the outer shell 21 is provided with a butt joint pin 213, the butt joint pin 213 drives the sliding blocks 17 to displace outwardly when the reel spring module 2 is assembled, and at the same time, the butt joint shaft 27 is sleeved and locked with the transmission shaft 15, and the locking piece 24 is pulled out in the assembled state.

[0040] The reel 14 is used for winding and releasing the safety belt webbing, which is in a high-frequency reciprocating rotation working condition in daily use, and needs to consider the rotation smoothness and long-term wear resistance. The reel 14 can adopt a structure form of a metal shaft core matched with an external winding drum body, or adopt a high-strength integrally formed drum body structure form, and the both ends of the reel 14 are usually rotationally supported with the main support 11 through a shaft sleeve or a bearing, so as to reduce friction, reduce abnormal sound and improve the consistency of the winding feeling. There is usually a linkage transmission relationship between the reel 14 and the emergency module 13, so that the emergency module 13 can limit the rotation of the reel 14 when triggered.

[0041] The transmission shaft 15 is arranged outside the reel 14 and is used for transmitting the winding torque provided by the reel spring module 2 to the reel 14. The transmission shaft 15 is provided with a convex body, which is a common anti-rotation structure feature in the field, which is used to provide circumferential positioning and anti-torque transmission capability, so as to avoid idling, slipping or accelerated wear under long-term winding pre-tightening force and repeated pulling load. Such convex structure can be a local boss, a special-shaped section or a key-shaped limit, and the common point is to realize reliable torque transmission through shape cooperation, so as to ensure that the reel spring winding force can be stably applied to the reel 14.

[0042] Further, the scheme is provided with opposite sliders 17 on both sides of the transmission shaft 15, and after the disassembly of the spring module 2, the sliders 17 are driven to move inward by the spring 18, so that the sliders 17 can lock the transmission shaft 15. The actual risk of this structure is that when the seat belt retractor is disassembled, the reel 14 may suddenly rotate under the residual pre-tightening force, the belt rebound force or external disturbance, which may cause injury or misalignment of internal parts. The reset force of the spring 18 is used to make the spring module 2 automatically enter the locking position once it is disassembled, so as to clamp or stop the rotation of the transmission shaft 15, thereby indirectly limiting the free rotation of the reel 14 and forming passive safety protection during the disassembly process. In order to improve the locking reliability and service life, the slider 17 can be made of wear-resistant material and the contact surface can be treated with wear-resistant strengthening, and the spring 18 can be made of spring steel to meet the requirements of elastic retention and fatigue life after long-term cycling. The contact and cooperation between the slider 17 and the transmission shaft 15 can adopt face contact or wedge limiting idea, so as to obtain stable anti-torsion locking ability without significantly increasing the assembly resistance, and to avoid the problem of jam caused by long-term friction.

[0043] The shell 21 of the spring module 2 is used to provide a mounting cavity and protection for the spring 23 and the center interface structure thereof, and the main functions thereof include limiting the radial expansion of the spring 23, providing a fixed reference for the outer end of the spring, isolating external dust and foreign matter, and providing a structure interface for gripping and positioning during disassembly. The shell 21 can be made of a metal shell or an enhanced engineering plastic shell, which is beneficial to impact resistance and thermal stability, and the enhanced engineering plastic shell is beneficial to weight reduction and batch molding consistency, both of which can meet the requirements of long-term temperature cycling, vibration impact and noise control in the vehicle.

[0044] The spring 23 is arranged inside the shell 21, and the outer side thereof is fixedly connected with the shell 21, and the inner side thereof is connected with the interface shaft 27, so that the interface shaft 27 can output the rewinding torque under the action of the spring 23. The spring 23 is a mature energy storage elastic element in the prior art, and its typical engineering characteristics are that a stable rewinding force can be formed by pre-tightening the number of turns, and an acceptable elastic attenuation level can be maintained after multiple cycles. The spring material is usually a spring steel strip and is subjected to heat treatment to obtain high yield strength and fatigue life, and the surface can be subjected to rust-proof treatment to improve the corrosion resistance. The interface shaft 27 is rotatably arranged at the center position of the shell 21, and its role is to serve as a power connecting piece between the output end of the spring 23 and the input end of the transmission shaft 15, so as to ensure that the rewinding torque can be stably transmitted to the transmission shaft 15 and further transmitted to the reel 14.

[0045] The locking member 24 is arranged outside the shell 21, which is used to lock the butt joint shaft 27 and the shell 21 in the disassembled state of the coil spring module 2. The technical significance of this locking is that the coil spring 23 itself is in a pre-tightening energy storage state, and if the butt joint shaft 27 can rotate freely after the coil spring module 2 is removed, the coil spring 23 may quickly release energy to cause rebound injury or damage to parts. By locking the butt joint shaft 27 and the shell 21 with the locking member 24, the coil spring module 2 can maintain a safe, stable, and controllable energy storage state after being separated from the whole machine, facilitating transportation, storage, and subsequent reassembly.

[0046] The butt joint pin 213 is arranged inside the shell 21, which forms a cooperation relationship with the sliding block 17 when the coil spring module 2 is assembled, thereby driving the sliding block 17 to move outward. The key effect of this cooperation is that when the coil spring module 2 is reassembled to the safety belt bracket 1, the sliding block 17 can be pushed out of the locking position by the butt joint pin 213, so that the transmission shaft 15 restores the rotatable state, and allows the butt joint shaft 27 and the transmission shaft 15 to complete the sleeve joint locking, realizing the torque transmission connection between the coil spring module 2 and the main bracket 11. After the coil spring module 2 is completely assembled in place, the locking member 24 is pulled out, thereby releasing the locking between the butt joint shaft 27 and the shell 21, so that the coil spring 23 enters the normal working state and provides a continuous rewinding force to the winding shaft 14. Through the above action chain, the double protection of automatic locking on the transmission shaft side and safety locking on the coil spring side is formed during disassembly, and during assembly, the sliding block 17 is pushed outward by the butt joint pin 213 to realize automatic unlocking and complete butt joint, and finally the locking member 24 is pulled out to restore the normal working of the coil spring, forming a complete, repeatable, and safe module replacement process.

[0047] Specifically, the outer side wall of the main bracket 11 is provided with a sliding groove 16 outside the shaft hole of the transmission shaft 15, the sliding block 17 is slidingly assembled in the sliding groove 16, and the spring 18 is assembled between the sliding block 17 and the sliding groove.

[0048] The main bracket 11 is provided with a sliding groove 16 on the outer side wall thereof and at the outer side region of the shaft hole of the transmission shaft, and the sliding groove 16 is used to provide a limited straight movement path for the sliding block 17, so that the sliding block 17 can only move in a radial or approximately radial reciprocating motion in a predetermined direction, thereby avoiding the sliding block 17 from being deflected, overturned, or stuck during the force process. This kind of sliding groove limiting structure belongs to the common basic guide form in mechanical transmission and locking mechanism, and the engineering purpose is to ensure the determinacy of the movement trajectory of the moving part through structural limiting, and to improve the reliability and repeatability of the locking action.

[0049] The slider 17 is assembled in the sliding groove 16 in a sliding manner, and the surface contact or line contact matching form can be adopted between the slider 17 and the sliding groove 16 to limit the excessive degrees of freedom on the premise of ensuring smooth sliding. In order to reduce the sliding friction resistance and reduce the wear after long-term use, the matching surfaces of the slider 17 and the sliding groove 16 can be surface treated or material matched as needed, for example, by setting a wear-resistant layer on the surface of the slider 17, or by selecting the material body to realize low friction characteristics. Such structure is widely used in the prior art for rotation stopping mechanism, automatic locking mechanism and disassembly protection mechanism, and its common feature is simple structure, reliable action and not dependent on additional driving source.

[0050] The spring 18 is arranged between the outer side of the slider 17 and the sliding groove 16, and is used to provide a continuous return driving force to the slider 17. The setting position of the spring 18 makes it in a compressed or tensioned state when the slider 17 is pushed outward, and can automatically release the elastic potential energy after the external force is removed, to drive the slider 17 to return to the initial locking position. The elastic return mode belongs to the mature passive reset scheme in the prior art, and its advantage lies in that it can automatically complete the position switching when the structure state changes without relying on manual operation or additional execution mechanism, thereby improving the safety and stability in the disassembly process.

[0051] In engineering design, the spring force of the spring 18 can be determined comprehensively according to the locking demand of the transmission shaft, the contact form between the slider and the transmission shaft, and the disassembly feel and other factors, so that the slider 17 can reliably enter the locking state after the spring module is disassembled, and at the same time, the assembly resistance will not be significantly increased due to excessive spring force during the assembly process of the spring module. The spring 18 can be made of spring steel material, and through reasonable wire diameter, number of turns and free length design, the fatigue life requirement under long-term repeated compression or stretching working condition can be met. The structure matching of the sliding groove 16 and the slider 17 limits the action direction of the spring 18 to the predetermined movement direction, avoiding abnormal wear or failure caused by spring force deflection.

[0052] Through the above structure, the sliding groove 16, the slider 17 and the spring 18 jointly constitute a stable, repeatable and self-resetting locking driving substructure, so that the slider 17 can complete the inward locking or outward releasing action as expected under different assembly states, and provide reliable basic mechanical guarantee for the whole modular spring disassembly process.

[0053] Specifically, the emergency module 13 is provided with a car machine interface 12 on the outer side.

[0054] The emergency module 13 is arranged on one side of the main support 11, and its main function is to control the instantaneous rotation of the reel when the vehicle is in an abnormal working condition, so as to quickly limit the behavior of the seat belt. Such an emergency module belongs to a mature functional unit in the seat belt retractor, and its basic working principle is to trigger the internal locking mechanism by sensing the vehicle deceleration change, vehicle posture change or seat belt rapid pulling state signal, so that the reel is switched from a free rotation state to a restricted state, thereby inhibiting the seat belt from continuing to release, and achieving the purpose of restraining the passenger.

[0055] The outer side of the emergency module 13 is provided with a car interface 12 for forming a signal connection relationship with the vehicle control system or safety system. Through the interface, the emergency module 13 can receive state signals from the vehicle side, or feedback the working state of itself to the vehicle control system, so as to participate in cooperative control in the vehicle safety strategy. The interface structure itself does not participate in the mechanical locking action, and its setting is mainly used to meet the needs of information interaction, state monitoring or function cooperation of the modern vehicle safety belt system, and belongs to the gradually popular structure configuration form in the prior art.

[0056] In engineering implementation, the emergency module 13 usually adopts a closed structure to ensure the stability of the internal sensitive components under vibration, temperature and humidity changes and long-term use conditions, and its locking action has the characteristics of fast response, clear action and high repeatability. Since the emergency module 13 undertakes the key safety function in the whole safety belt system, its structure and installation position are usually kept relatively fixed, and it is not suitable to be frequently disassembled during maintenance. The present scheme sets the coil spring module as a replaceable structure, so that daily maintenance is more concentrated on the retraction side components, thereby realizing the function maintenance and performance recovery of the whole safety belt system without changing the original working principle and assembly state of the emergency module 13.

[0057] Specifically, the outer side of the sliding block 17 is provided with an inclined abutment groove 19, the inner side of the shell 21 is provided with an inner cover 22 outside the coil spring 23, the abutment pin 213 is integrally formed on the outer wall of the inner cover 22, the abutment pin 213 is in an inclined shape, and the shape of the abutment pin 213 is complementary to the shape of the abutment groove 19.

[0058] The outer side of the sliding block 17 is provided with an inclined abutment groove 19, which is arranged inclined along the moving direction of the sliding block 17, and its role is to convert the axial or approximately axial movement of the outer member into the radial displacement of the sliding block 17. Such inclined groove structure belongs to the common inclined plane force transmission form in mechanical structure, and its basic engineering principle is to decompose the axial thrust into radial component force through inclined plane contact, so as to realize the conversion of movement direction without additional driving mechanism. Compared with the straight pushing structure, the inclined abutment groove 19 has the characteristics of smooth force, continuous action and not easy to occur instantaneous impact, which is suitable for the structure scene which needs to complete the position switching gradually in the assembly process.

[0059] An inner cover 22 is arranged inside the coil spring module and at the position outside the coil spring, which is used to shield and limit the internal structure of the coil spring, and also serves as the installation base of the abutment pin 213. The inner cover 22 is integrally formed on the inner side of the shell or fixedly connected with the shell, and its structural position is relatively stable, which can ensure that the movement track of the abutment pin 213 in the assembly process is consistent with the abutment groove 19 of the sliding block 17. Such inner cover structure is commonly used in the internal coil spring assembly in the prior art, which is used to limit the working space of the coil spring, reduce the invasion of foreign matters and provide the installation position of the auxiliary functional parts.

[0060] The abutment pin 213 is arranged on the outer wall of the inner cover 22 and forms a shape matching relationship with the abutment groove 19 on the sliding block 17. The abutment pin 213 itself is inclined, and its inclined direction corresponds to the inclined direction of the abutment groove 19, so that they can form stable inclined plane cooperation in the contact process. When the coil spring module moves gradually to the side of the main support in the assembly direction, the abutment pin 213 first enters the entrance area of the abutment groove 19, and then slides along the inclined surface of the abutment groove 19 in the continuous advancing process, so as to exert an outward pushing force on the sliding block 17, and make the sliding block 17 gradually separate from the original locking position. The action process is continuous and progressive, and does not depend on additional manual operation, which can effectively avoid the impact or jam caused by instantaneous unlocking.

[0061] Through the cooperation of the inclined abutment groove 19 and the abutment pin 213, the release action of the sliding block 17 and the assembly action of the coil spring module form a linkage relationship in structure, that is, only when the coil spring module is correctly pushed into the assembly position, the sliding block 17 will move outward under the action of the abutment pin 213 and release the locking of the transmission shaft. This structural linkage method has high reliability in engineering, which can avoid the premature release of the sliding block due to misoperation or improper assembly, thereby improving the safety and consistency of the assembly process.

[0062] In addition, since the docking pin 213 and the docking groove 19 are both fixed shape structures, their matching action does not depend on elastic deformation or complex mechanisms, so they can maintain stable geometric relationships after long-term use and multiple disassembly and assembly, and are suitable for application in modular safety belt structures that need to be repeatedly maintained.

[0063] Specifically, the outer side of the docking shaft 27 is provided with a clamping groove 28, which is inserted at the center of the coil spring 23. The outer side of the docking shaft 27 is equipped with a docking piece 210, and the center of the docking piece 210 is fixedly connected to the docking shaft 27 by a screw 212.

[0064] The docking shaft 27 is the core force transmission component in the coil spring module, and its main function is to stably and reliably output the winding torque stored in the coil spring 23 and further transmit it to the transmission shaft direction. To achieve reliable connection between the coil spring 23 and the docking shaft 27, the outer side of the docking shaft 27 is provided with a clamping groove 28, which forms an insertion fitting relationship with the center end of the coil spring 23, so that the coil spring 23 can rotate synchronously with the docking shaft 27 during winding or releasing, without relative slipping.

[0065] This type of coil spring center end fixation by clamping groove structure is a common and mature structure form in coil spring assemblies. Its engineering characteristics are to provide stable circumferential limiting capability in limited space, while avoiding irreversible connection methods such as welding or riveting, thereby facilitating subsequent disassembly or replacement. The shape and size of the clamping groove 28 can be matched and designed according to the structure form of the center end of the coil spring 23, so that they form a reliable shape fitting relationship after assembly, thereby maintaining stable torque transmission effect under long-term repeated winding conditions.

[0066] The docking piece 210 is assembled on the outer side of the docking shaft 27, and the docking piece 210 is the external connecting component of the docking shaft 27. Its main function is to provide a stable mounting interface for subsequent assembly positioning and functional part connection. The docking piece 210 is fixedly connected to the docking shaft 27 by a screw, so that they form a reliable fixed relationship in the axial and circumferential directions. Compared with an integral structure, the screw fixing method is beneficial to checking and adjusting the connection state during assembly, and can realize controllable disassembly during maintenance or replacement, which meets the requirements of maintainability of modular structure.

[0067] In engineering design, the butt joint shaft 27 and the butt joint sheet 210 can be made of metal material to meet the strength and fatigue requirements in the process of torque transmission. The screw connection method can ensure reliable connection while avoiding structural failure due to stress concentration. The fastening method belongs to the commonly used mechanical connection means in the art, which has the characteristics of mature structure, stable assembly and high repeatability. Through the combination structure of the above-mentioned clamping slot insertion and screw fixation, the coil spring 23, the butt joint shaft 27 and the butt joint sheet 210 form a whole in function, which can not only stably output the winding force, but also provide a good structural basis for the disassembly and maintenance of the coil spring module.

[0068] Specifically, the outer side of the shell 21 is provided with a locking slot 29, and the inner side of the locking slot 29 is uniformly provided with a clamping tooth. The outer side of the locking piece 24 is provided with at least two locking pins 25, and the outer side of the locking pin 25 is provided with a meshing groove corresponding to the shape of the clamping tooth. In the disassembled state, the locking piece 24 passes through the outer side of the butt joint shaft 27 and is positioned with the clamping tooth.

[0069] Specifically, the outer side of the butt joint sheet 210 is provided with at least two insertion holes 211, and in the locked state, the locking pin 25 of the locking piece 24 penetrates the insertion hole 211 and engages with the clamping tooth inside the locking slot 29.

[0070] The outer side of the shell 21 is provided with a locking slot 29, and the locking slot 29 is arranged along the axial direction or the circumferential direction of the shell, and the inner side of the locking slot 29 is uniformly provided with a clamping tooth structure for providing a clear meshing positioning position for the locking piece. This kind of structure with clamping teeth on the outer side of the shell and used for insertion locking belongs to the common anti-rotation and anti-misoperation design form in mechanical devices, and its engineering purpose is to limit the free rotation of the internal rotating member in a specific state, thereby avoiding safety risks caused by misoperation or residual energy release.

[0071] The locking piece 24 is provided as a pluggable structure, and the outer side of the locking piece is provided with at least two locking pins. The plurality of locking pins are distributed along the circumferential direction of the locking piece, so that the locking piece can form engagement with the clamping tooth at multiple positions after being inserted into the locking slot, thereby obtaining higher circumferential stability. Compared with the single-point limiting structure, the multi-locking pin structure can effectively disperse the stress, reduce local stress concentration, and improve the reliability and durability in the locked state, which is suitable for application in coil spring assemblies that bear repeated loads.

[0072] In the disassembled state, the locking piece is inserted into the locking slot along a predetermined direction, and the locking pin of the locking piece forms an engagement relationship with the clamping tooth inside the locking slot, thereby limiting the rotation of the butt joint shaft relative to the shell. Since the coil spring is in a pre-tightening and energy storage state, this locking action can limit the internal winding torque inside the shell after the coil spring module is separated from the main support, preventing the sudden rotation of the butt joint shaft from causing the coil spring to rebound or causing personal injury. This locking method can be completed without relying on additional tools, which meets the engineering needs of on-site maintenance and quick disassembly.

[0073] Further, the outer side of the butt joint piece 210 is provided with at least two insertion holes, the positions of the insertion holes correspond to the distribution direction of the clamping teeth in the locking groove. When the locking piece is inserted into the locking groove, the locking pin penetrates the insertion holes on the butt joint piece in sequence and is engaged with the clamping teeth in the locking groove, thereby forming a direct limiting relationship between the butt joint shaft and the shell in structure. By taking the butt joint piece as an intermediate component, the locking torque can directly act on the corresponding position of the butt joint shaft, rather than only acting on the shell or external component, thereby improving the effectiveness and stability of the locking.

[0074] The structure of the insertion hole and the locking pin forms a penetrating locking, which can realize a clear locking state while maintaining a compact structure, and only needs to pull out the locking piece to complete the unlocking when the locking is released, the operation is intuitive and less prone to errors. Since the locking piece is only used in disassembly or non-working state, the structural design focuses more on reliability and easy operation, and does not affect the normal rewinding performance of the spring module. Through the cooperation between the locking groove, the clamping teeth, the locking piece, the locking pin and the insertion hole of the butt joint piece, the spring module is always in a controlled state during disassembly, transportation or temporary storage, thereby reducing the maintenance risk and improving the overall safety from the structural level.

[0075] Specifically, the outer side surface of the butt joint shaft 27 is provided with a protrusion, and the inner wall of the butt joint piece 210 is provided with a corresponding groove, and the butt joint shaft 27 and the butt joint piece 210 are clamped outside the shaft hole of the shell 21.

[0076] Specifically, the inner side of the locking piece 24 is provided with a mounting groove, and the inside of the mounting groove is provided with a magnetic point.

[0077] Specifically, the outer side of the shell 21 is integrally formed with a storage groove 214, and the inside of the storage groove 214 is provided with a groove body, and the inside shape of the groove body is the same as the outside shape of the locking piece 24.

[0078] The outer side surface of the butt joint shaft 27 is provided with a protrusion structure, and the inner wall of the butt joint piece 210 is provided with a groove structure corresponding to the protrusion, so that the butt joint shaft and the butt joint piece form a clear circumferential limiting relationship after assembly. The cooperation of the protrusion and the groove belongs to the anti-rotation structure commonly used in mechanical connection, which further limits the relative rotation between the butt joint shaft and the butt joint piece in addition to the screw fastening, thereby avoiding the connection loosening or wear aggravation caused by the micro relative displacement during the repeated rewinding and releasing of the spring. Through the structure, the butt joint shaft and the butt joint piece can still maintain stable angular consistency under long-term alternating torque working condition, which is beneficial to improve the durability of the spring module as a whole.

[0079] In the structural design of the locking piece, an installation groove is arranged on the inner side of the locking piece, and a magnetic retaining structure is arranged inside the installation groove. The magnetic retaining structure is used to form a certain adsorption effect on the locking piece in the non-locking state, so that the locking piece can be stably attached to the predetermined position after being removed, avoiding falling due to vibration or accidental touch during disassembly or maintenance. Such a structure temporarily retains parts by magnetic means, which is common in the field of mechanical equipment maintenance. Its advantage is that it can achieve reliable positioning without additional fastening action, and it can be easily removed when needed, without affecting the operation efficiency.

[0080] Further, the outer side of the shell 21 is integrally formed with a storage groove structure, and the inner shape of the storage groove matches the outer shape of the locking piece, which is used to store the locking piece when the coil spring module is in the normal working state. By arranging the storage groove directly on the outer side of the shell, the locking piece can be saved and managed together with the coil spring module, avoiding loss due to separate storage. This structure is an optimized design for maintenance convenience and safety, which does not participate in the normal rewinding work of the coil spring, but ensures that the locking piece can be taken by hand when the coil spring module needs to be disassembled, thereby reducing the safety risks caused by missing the locking step.

[0081] Through the above-mentioned circumferential limiting structure of the butt joint shaft and the butt joint piece, the magnetic retaining structure of the locking piece, and the locking piece storage structure on the outer side of the shell, the coil spring module is further improved in terms of structural stability, use safety and maintenance convenience. These structures all exist as auxiliary features, do not change the basic working principle of the coil spring module, but can significantly improve the reliability and practicality of the overall system in long-term use, multiple disassembly and actual maintenance scenarios.

[0082] For those skilled in the art, it is obvious that the present application is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0083] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A modular seat belt stowable latch assembly comprising a seat belt holder, characterized by: The outer side of the safety belt support is equipped with a coil spring module; The safety belt support comprises a main support, one side of which is equipped with an emergency module for instantaneous tightening and rotation stopping, and the other side of which is equipped with a replaceable coil spring module; The middle part of the main support is equipped with a reel, the outer side of which is provided with a transmission shaft with a convex body, and the outer side of the main support and on both sides of the transmission shaft is provided with oppositely arranged sliding blocks, which are driven to displace inwardly by a spring after the coil spring module is disassembled, and the sliding blocks after displacement can lock the transmission shaft; The coil spring module comprises a shell, the inside of which is provided with a coil spring, the outer side of which is clamped with the shell, and the inner side of which is clamped and equipped with a butt joint shaft, which is rotatably arranged at the center of the shell, the outer side of the shell is provided with a locking piece, which is inserted into the outside of the shell after the coil spring module is disassembled to lock the butt joint shaft and the shell; The inner side of the shell is provided with a butt joint pin, which drives the sliding block to move outwardly when the coil spring module is assembled, and at the same time, the butt joint shaft is locked with the transmission shaft sleeve, and the locking piece is pulled out in the assembled state.

2. The modular seat belt retractor assembly of claim 1, wherein: The outer wall of the main support is provided with a sliding groove outside the transmission shaft hole, the sliding block is slidingly arranged in the inside of the sliding groove, and the spring is arranged between the sliding block and the sliding groove.

3. The modular seat belt retractor assembly of claim 1, wherein: The outer side of the emergency module is provided with a car interface.

4. The modular seat belt retractor assembly of claim 1, wherein: The outer side of the sliding block is provided with an inclined butt joint groove, the inner side of the shell is provided with an inner cover outside the coil spring, the butt joint pin is integrally formed on the outer wall of the inner cover, and the butt joint pin is in an inclined shape, and the shape of the butt joint pin is complementary to the shape of the butt joint groove.

5. The modular seat belt retractor assembly of claim 1, wherein: The outer side of the butt joint shaft is provided with a clamping groove, the clamping groove is inserted into the center of the coil spring, the outer side of the butt joint shaft is equipped with a butt joint piece, and the center of the butt joint piece is fixed with the butt joint shaft by screwing.

6. The modular seat belt retractor assembly of claim 5, wherein: The outer side of the shell is provided with a locking groove, the inner side of the locking groove is uniformly provided with a clamping tooth, the outer side of the locking piece is provided with at least two locking pins, the outer side of the locking pin is provided with a meshing groove corresponding to the shape of the clamping tooth, and in the disassembled state, the locking piece passes through the outer side of the butt joint shaft and is positioned with the clamping tooth.

7. The modular seat belt retractor assembly of claim 6, wherein: The outer side of the butt joint piece is provided with at least two insertion holes, and in the locked state, the locking pin of the locking piece penetrates the insertion hole and engages with the clamping tooth inside the locking groove.

8. The modular seat belt retractor assembly of claim 5, wherein: The outer side surface of the butt joint shaft is provided with a convex block, and the inner wall of the butt joint piece is provided with a corresponding groove, and the butt joint shaft and the butt joint piece are clamped outside the shaft hole of the shell.

9. The modular seat belt retractor assembly of claim 1, wherein: The inner side of the locking piece is provided with a mounting groove, and the inside of the mounting groove is provided with a magnetic point.

10. The modular seat belt retractor assembly of claim 1, wherein: The outer side of the shell is integrally formed with a storage groove, the inside of the storage groove is provided with a groove body, and the inside shape of the groove body is the same as the outside shape of the locking piece.

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