Retractor device, safety belt device, seat and vehicle

Abstract

The invention discloses a retractor device, a safety belt device, a seat and a vehicle. The retractor device comprises a force limiting assembly, a pre-tightening mechanism and a clutch supporting plate, and the pre-tightening mechanism is arranged at the end of the force limiting assembly; when the retractor device carries out pre-tightening work, a pre-tightening mechanism can generate remarkable axial or radial pressure in the working process, and if the pressure cannot be effectively managed, adverse effects on the overall performance and the service life of the retractor can be possibly generated, however, according to the invention, a clutch supporting plate is additionally arranged; the clutch supporting plate is arranged between the force limiting assembly and the pre-tightening mechanism, so that the clutch supporting plate can bear at least part of radial pressure generated when the force limiting assembly deviates from the axis and rotates at the same time, the stability of the structure can be effectively enhanced, the service life is prolonged, the driving experience is improved, and the positive effects of reducing noise and vibration and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a seat belt retractor, a seat belt device, a seat and a vehicle. Background Art

[0002] In a retractor device (such as a car seat belt retractor), the force limiting mechanism of the retractor device may indeed produce a certain movement stroke that deviates from the axis during the retracting operation. This deviation may cause the force limiting device to exert a certain squeezing force on the retractor frame. If this squeezing force is too large, it may cause the frame to deform, loosen or be damaged, thereby affecting the stability and safety of the entire retractor. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a retractor device, which can withstand the radial pressure of the force limiting component deviating from the axis and rotating simultaneously when the installation belt device is pre-tightened, and has the advantages of low energy loss, low assembly precision requirement and high transmission stability.

[0004] The present invention also provides a safety belt device having the retractor device.

[0005] The present invention also provides a seat with the safety belt device.

[0006] The invention also provides a vehicle with the seat.

[0007] In order to achieve the above-mentioned object, a retractor device is proposed according to a first aspect of the present invention, comprising: a retractor device, characterized in that it comprises:

[0008] Force limiting components;

[0009] A pre-tightening mechanism, the pre-tightening mechanism being arranged at an end of the force-limiting assembly;

[0010] A clutch support plate is arranged between the force limiting assembly and the pre-tightening mechanism, and the clutch support plate can withstand at least part of the radial pressure of the force limiting assembly.

[0011] According to an embodiment of the present invention, it further comprises a frame, the force limiting assembly is arranged in the frame, and the clutch support plate is arranged on a first side wall of the frame close to the pre-tightening mechanism.

[0012] According to an embodiment of the present invention, the force limiting assembly has a first end surface close to the first side wall, and along the axial direction of the force limiting assembly, the minimum distance from the clutch support plate to the first end surface is smaller than the distance from the first side wall to the first end surface.

[0013] According to an embodiment of the present invention, the clutch support plate partially extends into the frame, and the portion of the clutch support plate extending into the frame is closer to the first end surface than the first side wall.

[0014] According to an embodiment of the present invention, the clutch support plate comprises a body and a first boss, the body is fixed to the first side wall, and the first boss is arranged on a side of the body close to the force limiting assembly. According to an embodiment of the present invention, along the direction from the clutch support plate to the first end face, the outer diameter of the first boss gradually decreases.

[0015] According to an embodiment of the present invention, the first boss is configured as a truncated cone, and the inclination angle is greater than or equal to 80° and less than 90°.

[0016] According to an embodiment of the present invention, the first boss is provided with a first hole, and the end of the force-limiting assembly close to the clutch support plate is provided with a first pre-tightening member, and the first pre-tightening member is suitable for passing through the first hole to be connected with the pre-tightening mechanism.

[0017] According to an embodiment of the present invention, the first hole is larger than the diameter of the first preload member, so that the first preload member does not contact the inner wall of the first hole when rotating along the axis.

[0018] According to an embodiment of the present invention, a first cylindrical hole is provided on the first side wall, and a diameter of the first cylindrical hole is larger than a maximum outer diameter of the force limiting assembly so that the force limiting assembly can pass through the first cylindrical hole.

[0019] According to an embodiment of the present invention, a first positioning structure is provided on the first side wall, and a second positioning structure is provided on the clutch tray, and the first positioning structure is positioned and matched with the second positioning structure.

[0020] According to an embodiment of the present invention, the diameter of the first boss is smaller than the diameter of the first barrel hole, so that the first boss passes through the first barrel hole.

[0021] According to an embodiment of the present invention, the maximum length of the body is greater than the diameter of the first cylindrical hole, so that the body abuts against the outer side wall of the frame.

[0022] According to an embodiment of the present invention, the clutch support plate is capable of bearing at least part of the axial pressure of the force limiting assembly.

[0023] According to an embodiment of the present invention, the retractor device further comprises a first bracket, the first bracket is mounted on an outer side wall of the frame, and the first bracket is arranged between the pre-tightening mechanism and the clutch support plate.

[0024] According to an embodiment of the present invention, the pre-tightening mechanism comprises a gear, and the gear is detachably connected to the first bracket.

[0025] According to an embodiment of the present invention, the first bracket is provided with a first groove, and part of the gears are suitable for being installed in the first groove.

[0026] According to an embodiment of the present invention, the first bracket is provided with a second hole, and the diameter of the second hole is larger than the diameter of the first preload member, so that the first preload member passes through the second hole to be connected with the gear.

[0027] According to an embodiment of the present invention, the retractor device further comprises a bushing, and the bushing is suitable for being sleeved on the first preload member.

[0028] According to an embodiment of the present invention, the force-limiting assembly includes a belt reel and a lock seat, the belt reel and the lock seat are detachably connected, and the belt reel and the lock seat are made of the same material.

[0029] According to an embodiment of the present invention, the material of the tape reel and the lock seat may be aluminum alloy.

[0030] According to an embodiment of the present invention, the lock seat is sleeved on the end of the belt reel.

[0031] According to an embodiment of the present invention, the tape reel further comprises a buffer member, and the buffer member is arranged between the tape reel and the lock seat.

[0032] According to an embodiment of the present invention, a positioning hole is provided at the end of the tape reel, and the buffer is suitable for being placed in the positioning hole.

[0033] According to an embodiment of the present invention, the retractor device further comprises a vehicle sensing component, the vehicle sensing component is fixed on the outer side of the frame, and the vehicle sensing component is arranged opposite to the clutch support plate.

[0034] According to a second aspect of the present invention, a seat belt device is provided, comprising at least a webbing and a retractor device according to the first aspect of the present invention.

[0035] According to a third aspect of the present invention, a seat is provided, characterized in that the seat comprises a seat body and according to a second aspect of the present invention, a seat belt device is provided.

[0036] According to a fourth aspect of the present invention, a vehicle is provided. The vehicle includes a vehicle body and a seat belt device according to the third aspect of the present invention.

[0037] By adopting the above scheme, the beneficial effects of the present invention are:

[0038] In the designed retractor device, by adding a clutch tray, the radial pressure generated by the deviation of a part of the force limiting component from the axis and the simultaneous rotation during operation can be effectively reduced, thereby preventing the force limiting component from excessive deviation or damage.

[0039] In order to achieve the above functions, the clutch tray includes a first boss and a body. Through reasonable strength design and optimization of the side wall shape of the first boss, it is ensured that the clutch tray can work stably and reliably during pre-tightening and operation. The body abuts against the side wall of the frame where the force-limiting component is placed. The first boss extends to the inside of the frame. The distance between the position in the frame and the limit component is smaller than the distance between the side wall of the frame. This ensures that when pre-tightening occurs, if the force-limiting component deviates from the axis and rotates, the pre-tightening force of the force-limiting component can be first transmitted to the first boss. The first boss can withstand radial pressure and play a role in decomposing pressure.

[0040] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0042] Figure 1 It is an exploded view of the structure of an embodiment of a reeling device of the present invention provided in an embodiment of the present application.

[0043] Figure 2 This is a schematic diagram of the structure of a first bracket 2 provided in an embodiment of the present application;

[0044] Figure 3 This is a schematic diagram of the structure of a clutch support plate 3 provided in an embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of the AA cross-sectional structure of a clutch support plate 3 provided in an embodiment of the present application;

[0046] Figure 5 It is a structural schematic diagram of a force-limiting component 4 provided in an embodiment of the present application;

[0047] Figure 6 is a cross-sectional schematic diagram of a force-limiting component 4 provided in an embodiment of the present application;

[0048] Figure 7 It is an exploded view of a force-limiting component 4 provided in an embodiment of the present application;

[0049] Figure 8 A schematic structural diagram of a pre-tightening guard plate assembly provided in an embodiment of the present application;

[0050] Reference numerals:

[0051] 1. pre-tightening mechanism; 11. first bolt; 12. pre-tightening guard plate assembly; 121. pre-tightening guard plate; 122. rack; 123. sealing ring; 124. gas generator; 125. rack positioning bracket; 13. gear; 131. gear teeth;

[0052] 2. first bracket; 21. second bolt; 22. second hole;

[0053] 3. Clutch support plate; 31. Second positioning structure; 32. First boss; 33. Main body; 34. First hole;

[0054] 4. force-limiting assembly; 41. first end face; 42. first preload member; 43. preload end face; 44. preload shaft column; 45. bushing; 451. spring piece; 452. convex rib; 46. belt reel; 461. buffer member; 462. positioning hole; 47. lock seat; 471. locking claw; 472. reset locking spring; 473. force-limiting shaft;

[0055] 5. frame; 51. first tube hole; 52. first positioning structure; 53. first side wall;

[0056] 6. Coil spring assembly;

[0057] 7. Belt sensor

[0058] 8. Car-sensing base;

[0059] 9. Vehicle sensing components. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0062] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0063] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, when describing a pipeline, the "connected" and "connection" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0064] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0065] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0066] The present application provides a vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid vehicle, an extended-range electric vehicle, a fuel vehicle, etc. The vehicle may also be a car, a van, a bus, a truck, a trailer, etc.

[0067] The vehicle provided in some embodiments of the present application includes a body and wheels. The body is used for passengers to sit and carry objects, and the wheels are installed under the body to carry the body and can roll on the road surface to make the vehicle travel.

[0068] The vehicle also includes seats. The seats are located inside the vehicle body and are the main support points for passengers during the driving process of the vehicle, ensuring that passengers can sit stably and comfortably. Through reasonable design and material selection, the seats can provide sufficient support, disperse body weight, and reduce fatigue caused by long-term riding. The seats can include electrically adjustable seats and manually adjustable seats.

[0069] The seat may also include a seat belt device, which can usually be selectively installed on both sides or below the seat. The seat belt device plays a vital role in ensuring the safety of passengers. When the vehicle collides or emergency brakes, the seat belt can quickly fix the occupant on the seat to prevent him from rushing forward or leaning back due to inertia, thereby avoiding secondary collisions with hard objects in the vehicle such as the steering wheel, instrument panel, and windows.

[0070] The seat belt device may also include a retractor device, and the specific location of the retractor device may vary depending on the vehicle model and design. It is connected to one end of the seat belt device webbing and realizes the automatic retraction and locking function of the webbing through an internal mechanism. When installed, the retractor device will be firmly fixed to the seat frame or body structure to ensure its stability and reliability.

[0071] The retractor device according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0072] like Figure 1-Figure 7 As shown, according to an embodiment of the present invention, a retractor device includes: a force limiting component 4; a pretensioning mechanism 1, which is arranged at the end of the force limiting component 4; a clutch support plate 3, which is arranged between the force limiting component 4 and the pretensioning mechanism 1, and the clutch support plate 3 can withstand at least part of the radial pressure of the force limiting component 4.

[0073] It is understandable that when the reel device is working, the force limiting component 4 may generate a part of additional force when working, and the additional force generated is the radial force generated by the force limiting component 4 deviating from the rotation path. This radial force will not only affect the normal operation of the reel device, but also may cause material damage or system failure. In the implementation scheme, a clutch support plate 3 is added, and the clutch support plate 3 is arranged at the end position of the force limiting component 4 to play the role of decomposing the radial force. It is also understandable that when the reel device is working, the pre-tightening mechanism 1 therein will generate a part of axial pressure by squeezing the reel device. The clutch support plate 3 is arranged between the force limiting component 4 and the pre-tightening mechanism 1, and it can also withstand the axial pressure generated by the pre-tightening mechanism 1 in the axial direction, so that the reel device is more fixed and the durability is improved.

[0074] like Figure 1As shown, in some embodiments, the retractor device further includes a frame 5, the force limiting assembly 4 is disposed in the frame 5, and the clutch support plate 3 is disposed on the first side wall 53 of the frame 5 close to the pretensioning mechanism 1. It is understandable that the frame 5 is the basic structure of the retractor device, which provides a platform for installing and supporting other components. The frame 5 usually has sufficient strength and rigidity to ensure stability during the operation of the retractor device. The force limiting assembly 4 is passed through the frame 5, and the force limiting assembly 4 is rotatably matched with the frame 5. The first side wall 53 of the frame 5 is suitable for assembling the clutch support plate 3 to fix the position of the clutch support plate 3.

[0075] In some embodiments, the force limiting assembly 4 has a first end surface 41 close to the first side wall 53 , and along the axial direction of the force limiting assembly 4 , the minimum distance from the clutch support plate 3 to the first end surface 41 is smaller than the distance from the first side wall 53 to the first end surface 41 .

[0076] It can be understood that the distance between the clutch support plate 3 and the first end face 41 of the force limiting component 4 close to the first side wall 53 refers to the straight-line distance between the two, which can be defined as D1. The distance from the first side wall 53 of the frame 5 to the first end face 41 is D2. In the actual finished product, D1 is smaller than D2. The beneficial effect of this arrangement is that when the force limiting component 4 is in operation, it normally rotates only within the frame 5. However, in the event of a fault or deviation, the force limiting component 4 will deviate from the axis and approach the first side wall 53 of the frame 5. If the force limiting component 4 transmits radial force to the frame 5, the frame 5 will become unstable, thereby increasing the vibration and affecting the stability and safety of the retractor device. In the implementation scheme, since the clutch support plate 3 is added and the clutch support plate 3 takes on the radial force of the force limiting component 4 in advance, the clutch support plate 3 fits the first end face 41 of the force limiting component 4, thereby playing the role of decomposing force, which can enable the retractor device to work stably.

[0077] In some embodiments, the clutch support plate 3 partially extends into the frame 5 , and the portion of the clutch support plate 3 extending into the frame 5 is closer to the first end surface 41 than the first side wall 53 .

[0078] In some embodiments, Figure 3As shown, the clutch support plate 3 includes a body 33 and a first boss 32 . The body 33 is fixed to the first side wall 53 , and the first boss 32 is disposed on one side of the body 33 close to the first end surface 41 . It can be understood that the clutch support plate 3 includes a main body 33 which needs to be fixed on the first side wall 53 of the frame 5. The main body 33, as the main structural part of the clutch support plate 3, bears the weight of the entire clutch support plate 3 and the force that may be transmitted. At the same time, the clutch support plate 3 needs to be closer to the first end face 41 of the force limiting component 4 than the first side wall 53. Since the main body 33 is fixed on the first side wall 53, the clutch support plate 3 is also provided with a first boss 32. The first boss 32 is specially arranged on the side of the main body 33 close to the force limiting component 4. Part of the first boss 32 extends into the frame 5. It can be seen that when the force limiting component 4 works normally, the first boss 32 does not contact the force limiting component 4, which can ensure that the force limiting component 4 does not interfere during normal operation. In the event of a fault or deviation, the first boss 32 contacts the force limiting component 4 before the first side wall 53, and assumes and decomposes the radial force in advance.

[0079] In summary, the design of the clutch support plate 3 not only meets the basic structural support and installation requirements by combining the main body 33 with the first boss 32, but also realizes precise docking and force transmission with the force limiting component 4 through the specific design of the first boss 32, thereby ensuring the stability and reliability of the entire mechanism.

[0080] In some embodiments, Figure 4 As shown, the outer diameter of the first boss 32 gradually decreases along the direction from the clutch support plate 3 to the first end face 41. It can be understood that the outer diameter slowly decreases along the extension direction of the first boss 32, and at the end face position of the first boss 32, the edge is chamfered to facilitate the first boss 32 to enter the first side wall 53 more easily.

[0081] In some embodiments, the first boss 32 is configured as a truncated cone, and the inclination angle is greater than or equal to 80° and less than 90°. It is understandable that the first boss 32 should be as steep as possible, so that the side wall of the first boss 32 is cylindrical or nearly cylindrical, so as to ensure that when the radial extrusion force of the pre-tightening bearing force-limiting component 4 occurs, the side wall of the first boss 32 radially extrudes the frame 5 to prevent the first boss 32 from slipping out of the frame 5. When the inclination angle is close to 90°, the first boss 32 is closer to vertical, which helps to increase the stability of the first boss 32. However, a completely vertical side wall (i.e., a 90° angle) may be difficult to achieve in manufacturing, or may not be the best choice in some applications. Therefore, selecting an angle that is slightly less than 90° but close to it is based on a comprehensive consideration of factors such as stability, space utilization, manufacturing and assembly. Such a design not only meets the basic functional requirements of the object, but also optimizes its overall performance and manufacturing cost.

[0082] In some embodiments, Figure 1 As shown, a first positioning structure 52 is provided on the first side wall 53, and a second positioning structure 31 is provided on the clutch tray 3, and the first positioning structure 52 is positioned and matched with the second positioning structure 31. It can be understood that the clutch tray 3 needs to be fixed on the frame 5, and can be fixed by bolts, riveting, welding or snap-on fixing. In the embodiment, it can be seen that the clutch tray 3 is matched with the frame 5 by bolt fixing, and the first positioning structure 52 is provided on the first side wall 53, and the clutch tray 3 is provided with a second positioning structure 31. The first positioning structure 52 and the second positioning structure 31 are adapted one by one, and are suitable for bolts to pass through the holes of the two at the same time, so as to meet the fixing requirements of the clutch tray 3 and the frame 5.

[0083] In some embodiments, a first cylindrical hole 51 is provided on the first side wall 53, and the diameter of the first cylindrical hole 51 is larger than the maximum outer diameter of the force limiting component 4, so that the force limiting component 4 can pass through the first cylindrical hole 51. It can be understood that in order to make the frame 5 relatively firm, the frame 5 is designed to be an integrally formed frame structure. In order to place the force limiting component 4 inside the frame 5, the first cylindrical hole 51 is opened on the first side wall 53 with the axis as the origin. The design of the first cylindrical hole 51 needs to ensure that the maximum outer diameter of the force limiting component 4 can also pass smoothly. Therefore, the diameter of the first cylindrical hole 51 is larger than the maximum outer diameter of the force limiting component 4. This hole-opening assembly method can simplify the installation process. The hole-opening design allows the force limiting component 4 to pass directly through the hole of the frame 5 without complicated additional connectors or structures, thereby simplifying the installation process and improving assembly efficiency. At the same time, when maintenance or replacement is required, the force limiting component 4 can be more easily approached and disassembled through the hole-opening design, reducing maintenance costs and time.

[0084] In some embodiments, the diameter of the first boss 32 is smaller than the diameter of the first barrel hole 51, so that the first boss 32 is inserted into the first barrel hole 51. It is understandable that the first boss 32 needs to extend into the interior of the frame 5, so the diameter of the first boss 32 is smaller than the diameter of the first barrel hole 51, so that the first boss 32 is inserted into the first barrel hole 51. It is conceivable that the first barrel hole 51 only needs to be designed with a diameter slightly larger than the first boss 32 to meet the insertion requirements, and at the same time, it can play a fixing effect to prevent the first boss 32 from falling off.

[0085] In some embodiments, the maximum length of the body 33 is greater than the diameter of the first barrel hole 51, so that the body 33 abuts against the outer side wall of the frame 5. It is understandable that the shape of the body 33 can be designed as an irregular structure, and the irregular structure makes the buffering force more evenly and effectively distributed, thereby improving the buffering effect. This design can more effectively absorb and disperse the impact energy and reduce damage to the protected object. At the same time, the irregular structural steel has strong adaptability, and the irregular structure of the buffer 461 can fit the surface of the object more closely, avoiding gaps or looseness during the impact process, thereby further enhancing the buffering effect. The body 33 needs to be close to the first side wall 53, so the maximum length of the body 33 needs to be greater than the diameter of the first barrel hole 51, so that the body 33 abuts against the first side wall 53 of the frame 5, and an asymmetric second positioning structure 31 can be designed on the body 33 to ensure that the body 33 can fit closely to the first side wall 53.

[0086] In some embodiments, Figure 3 As shown, the first boss 32 is provided with a first hole 34 , and the end of the force limiting assembly 4 close to the clutch support plate 3 is provided with a first pre-tightening member 42 , which is suitable for passing through the first hole 34 to be connected with the pre-tightening mechanism 1 .

[0087] In some embodiments, Figure 1 As shown, the first hole 34 is larger than the diameter of the first pre-tightening member 42 , so that the first pre-tightening member 42 does not contact the inner wall of the first hole 34 when rotating along the axis.

[0088] It is understandable that the clutch support plate 3 is only used as an auxiliary part in the retractor device, and the force-limiting component 4 cooperates with the pre-tightening mechanism 1 to complete the pre-tightening retracting state. Since the clutch support plate 3 is arranged between the force-limiting component 4 and the pre-tightening mechanism 1, the clutch support plate 3 is provided with a first hole 34 for the first pre-tightening member 42 arranged on the side of the force-limiting component 4 close to the clutch support plate 3 to pass through, so as to meet the connection between the first pre-tightening member 42 and the pre-tightening mechanism 1. In addition, because the first hole 34 is only used as an avoidance feature, it is necessary to ensure that the first pre-tightening member 42 does not contact the inner wall of the first hole 34 when rotating along the axis in actual design, so the diameter of the first hole 34 needs to be larger than the diameter of the first pre-tightening member 42.

[0089] In some embodiments, Figure 2 As shown, it includes a first bracket 2, which is assembled on the outer wall of the frame 5 by a second bolt 21, and the first bracket 2 is arranged between the pre-tightening mechanism 1 and the clutch support plate 3. It can be understood that the first bracket 2 is arranged between the pre-tightening mechanism 1 and the clutch support plate 3, so that when the pre-tightening mechanism 1 is pressed toward the first bracket 2, the first bracket 2 is deformed, and the pre-tightening mechanism 1 is clamped by the pre-tightening mechanism 1 and the first bracket 2 when the retractor device is in a normal working state (no pre-tightening occurs), and cannot rotate or move axially.

[0090] In some embodiments, Figure 1 As shown, it can be understood that the pre-tightening mechanism 1 also includes a pre-tightening guard plate assembly 12, and the first bolt 11 is suitable for fixing the pre-tightening guard plate assembly 12 to the frame 5. The pre-tightening guard plate assembly 12 mainly includes: a rack 122, a sealing ring 123, a gas generator 124, a rack positioning bracket 125, a pre-tightening guard plate 121, etc. The rack 122 is fixed in the pre-tightening guard plate assembly 12 through the sealing ring 123 and the rack positioning bracket 125, and the gas generator 124 is riveted in the pre-tightening guard plate assembly 12 in a certain direction. When the car collides, the gas generator 124 is first ignited, and the rack 122 located in the pre-tightening guard plate assembly 12 rushes out to drive the gear 13 to rotate, and at the same time drives the first pre-tightening member 42 to rotate, and the two together drive the belt reel 46 to rotate. At this time, the reel device realizes the pre-tightening function. After the pre-tightening action, the driver and passengers continue to lean forward, and the force limiting function is realized by the reel device.

[0091] In some embodiments, Figure 1 As shown, the preload mechanism 1 includes a gear 13, and the gear 13 is detachably connected to the first bracket 2. It can be understood that the detachable connection design of the gear 13 and the first bracket 2 makes it more convenient to maintain and replace the gear 13. When the gear 13 is worn or damaged, there is no need to disassemble the entire transmission system, and it is only necessary to simply disassemble and replace a new gear 13, which greatly improves the maintenance efficiency.

[0092] In some embodiments, the first bracket 2 is provided with a first groove 23, and part of the gear 13 is suitable for being installed in the first groove 23. It can be understood that the first groove 23 provides a precise installation position for the gear 13, which helps to ensure the accuracy of the gear 13 during the transmission process. By embedding part of the gear 13 in the first groove 23, the contact area between the gear 13 and the first bracket 2 can be increased, thereby improving the stability of the connection.

[0093] In some embodiments, the first bracket 2 is provided with a second hole 22, and the diameter of the second hole 22 is larger than the diameter of the first preload member 42, so that the first preload member 42 passes through the second hole 22 and is connected to the gear 13. It is understandable that the first preload member 42 needs to be connected to the gear 13 in a transmission manner, and therefore, the first bracket 2 needs to be provided with a second hole 22, and the diameter of the second hole 22 is larger than the diameter of the first preload member 42.

[0094] In some embodiments, the retractor device further includes a bushing 45, which is suitable for being sleeved on the first preload member 42. It is understandable that the bushing 45 has a rib 452, which matches the preload shaft column 44 of the force limiting assembly 4. The rib 452 and the preload shaft column 44 have smooth walls, and lubricating grease can be filled in between, and the belt reel 46 can rotate around the sleeve force limiting shaft 473. At the same time, the cylindrical surface of the bushing 45 is fixed in the gear 13, and the rib 452 of the bushing 45 is interference fit with the gear teeth 131. During the assembly process, the rib 452 of the bushing is squeezed and deformed, so that the bushing 45 is fixed on the gear 13 and cannot rotate freely.

[0095] The bushing 45 is provided with spring pieces 451 evenly arranged around the axis. The spring pieces 451 contact the pre-tightening end face 43 of the tape reel 46 and are squeezed and deformed. After deformation, the spring pieces 451 apply elastic force to the pre-tightening end face 43. The resultant elastic force is parallel to the force-limiting axis 473 of the tape reel 46, so that the tape reel 46 is subjected to axial elastic force, which allows it to rotate around the axis while avoiding axial shaking.

[0096] In some embodiments, Figure 4 As shown, the force limiting assembly 4 includes a belt reel 46 and a lock seat 47. The belt reel 46 and the lock seat 47 are detachably connected and are made of the same material.

[0097] In some embodiments, the material of the tape reel 46 and the lock base 47 may be aluminum alloy.

[0098] It is understandable that the same material has the same coefficient of thermal expansion, which helps to maintain a close fit between the two when the temperature changes, and reduces the gap or stress caused by thermal expansion and contraction. Using the same material can more easily achieve processing matching between the two, for example, through machining, heat treatment and other processes, their surface roughness, hardness and other properties are made consistent, thereby improving the reliability and sealing of the connection. From the perspective of production and procurement, using the same material can simplify material management and reduce production costs. In this embodiment, the material of the reel 46 and the lock seat 47 is preferably aluminum alloy, which is light and high in strength: the density is relatively low, about one-third of the density of steel, so it has a lightweight characteristic, so that the product has a lightweight feature.

[0099] In some embodiments, the lock seat 47 is sleeved on the end of the tape reel 46 .

[0100] In some embodiments, the tape reel 46 further includes a buffer 461 , which is disposed between the tape reel 46 and the lock seat 47 .

[0101] In some embodiments, a positioning hole 462 is defined at the end of the tape reel 46 , and the buffer 461 is suitable for being placed in the positioning hole 462 .

[0102] It can be understood that the lock seat 47 is sleeved on the end of the belt reel 46, and the position at which it is set is opposite to the first preload member 42, and is respectively located at the two ends of the belt reel 46. It can be further understood that since the belt reel 46 and the lock seat 47 are made of the same material, as the belt reel 46 rotates, heat will be generated on the surfaces of both, causing the temperature of the contact surface between the belt reel 46 and the lock seat 47 to increase. This thermal expansion will further aggravate the mutual interference between the surfaces and soften the metal during repeated friction. When the metal softens to a certain extent, the metal surface below may begin to fuse, thereby causing adhesion. In order to prevent the tape reel 46 from being interfered with by the lock seat 47 and to allow it to rotate independently and normally and efficiently, the tape reel 46 also includes a buffer 461, which is disposed between the tape reel 46 and the lock seat 47. The buffer 461 can reduce the friction between the two. It can be understood that a positioning hole 462 is provided at the end of the tape reel 46, and the positioning hole 462 is provided to be compatible with the structure of the buffer 461 to ensure that the buffer 461 can be accurately placed in the positioning hole 462. For example, the positioning hole 462 is provided in a circular shape, and the buffer 461 is a circular ring structure. The circular design can ensure balanced material use and the same thickness, thereby ensuring that each contact surface can disperse stress more evenly when subjected to external force, reduce stress concentration, thereby reducing the risk of damage to the buffer 461 due to excessive local stress and improving the bearing capacity.

[0103] The buffer 461 can be made of materials such as POM (polyoxymethylene), polycarbonate (PC), polyetheretherketone (PEEK), etc., preferably POM (polyoxymethylene). POM (polyoxymethylene) has the characteristics of mechanical properties, corrosion resistance, wear resistance and dimensional stability, which can ensure the normal and efficient operation of the tape reel 46.

[0104] In particular, the force limiting assembly 4 further includes a force limiting shaft 473, which is fixed between the belt drum 46 and the lock seat 47 and can rotate around the axis. The force limiting shaft 473 and the lock seat 47 are meshed and riveted through concave-convex splines, and the force limiting shaft 473 and the belt drum 46 are connected through concave-convex splines.

[0105] In particular, if Figure 4 As shown, the lock seat 47 also includes a locking claw 471, and the locking claw 471 is arranged in the inner cavity of the lock seat 47. It can be understood that after the retractor device realizes the pre-tightening function, when the vehicle acceleration exceeds the threshold value, the locking claw 471 slides out of the cavity of the lock seat 47, and at the same time engages with the teeth on the frame 5 to form a locking structure, thereby fixing the lock seat 47, and the force limiting shaft 473 continues to twist, and the retractor device realizes the force limiting function.

[0106] In particular, if Figure 4As shown, the lock seat 47 also includes a reset locking spring 472. The reset locking spring 472 is designed to have a sleeve structure at both ends so that the two ends are respectively sleeved and connected with the force limiting shaft 473 and the locking claw 471. When the retractor device realizes the pre-tightening function, when the rotation speed is too large, the locking claw 471 will shake and centrifugal movement will occur, causing the locking claw 471 to deviate outward. The reset locking spring 472 provides a pulling force to pull the locking claw 471 back to the set position to ensure that its retractor device can work normally.

[0107] In some embodiments, the retractor device further includes a vehicle sensing component 9 , which is fixed to the outside of the frame 5 , and the vehicle sensing component 9 is arranged opposite to the clutch support plate 3 .

[0108] It can be understood that the vehicle sensing component 9 includes a vehicle sensing base 8, a belt sensing component 7 and a coil spring component 6 fixed on the side wall of the frame 5. The vehicle sensing component 9 is arranged opposite to the clutch support plate 3. The vehicle sensing base 8 is one of the core parts of the vehicle sensing component 9, which usually contains sensors or other detection elements. These sensors may be used to detect the movement state of the vehicle (such as acceleration, deceleration), the presence or position of the occupants, etc., so as to automatically trigger the action of the retractor when necessary (such as automatic tightening of the seat belt). The belt sensing component 7 is mainly used to sense or monitor the state of the retractor, such as the tension of the retractor, length change, or whether it is in a locked state. It can also include tension sensors, position sensors or other types of detection elements to achieve real-time monitoring of the retractor state. Through the belt sensing component 7, the system can determine whether it is necessary to adjust the tightness of the retractor or trigger other safety measures.

[0109] The coil spring assembly 6 is a key component that drives the retractor to roll and retract. When the retractor needs to be released (such as when the passenger unfastens the seat belt), the spring in the coil spring assembly 6 will release the stored energy to allow the retractor to unfold smoothly. The design of the coil spring assembly 6 should ensure its stability and reliability during long-term use, while meeting the requirements for retraction speed and force.

[0110] In summary, the vehicle sensing assembly 9 of the retractor device realizes real-time monitoring and automatic control of the retractor state through the coordinated work of various components, thereby improving the safety of the vehicle and the comfort of the passengers.

[0111] In understanding the scope of the present invention, the term "comprise" and its derivatives as used herein are intended to be open terms, which specify the existence of recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "include", "have" and their derivatives.

[0112] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0113] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0114] The invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the invention, and these variations and modifications all fall within the scope of the protection claimed by the invention.

Claims

1. A retractor device, characterized in that: include: Force limiting assembly (4); A pre-tightening mechanism (1), wherein the pre-tightening mechanism (1) is arranged at an end of the force-limiting component (4); A clutch support plate (3), wherein the clutch support plate (3) is arranged between the force limiting component (4) and the pre-tightening mechanism (4), and the clutch support plate (3) is capable of bearing at least part of the radial pressure of the force limiting component (4).

2. The retractor device according to claim 1, characterized in that: It also comprises a frame (5), the force limiting assembly (4) is arranged in the frame (5), and the clutch support plate (3) is arranged on a first side wall (53) of the frame (5) close to the pre-tightening mechanism (1).

3. The retractor device according to claim 2, characterized in that: The force limiting component (4) has a first end surface (41) close to the first side wall (53), and along the axial direction of the force limiting component (4), the minimum distance from the clutch support plate (3) to the first end surface (41) is smaller than the distance from the first side wall (53) to the first end surface (41).

4. The retractor device according to claim 3, characterized in that: The clutch support plate (3) partially extends into the frame (5), and the portion of the clutch support plate (3) extending into the frame (5) is closer to the first end surface (41) than the first side wall (53).

5. The retractor device according to claim 4, characterized in that: The clutch support plate (3) comprises a body (33) and a first boss (32); the body (33) is fixed to the first side wall (53); and the first boss (32) is arranged on a side of the body (33) close to the first end surface (41).

6. The retractor device according to claim 5, characterized in that: Along the direction from the clutch support plate (3) to the first end surface (41), the outer diameter of the first boss (32) gradually decreases.

7. The retractor device according to claim 6, characterized in that: Therefore, the first boss (32) is constructed in a truncated cone shape, and the inclination angle is greater than or equal to 80° and less than 90°.

8. The retractor device according to claim 5, characterized in that: The first boss (32) is provided with a first hole (34), and the force-limiting assembly (4) is provided with a first pre-tightening member (42) at one end close to the clutch support plate (3), and the first pre-tightening member (42) is suitable for passing through the first hole (34) to be connected with the pre-tightening mechanism (1).

9. The retractor device according to claim 8, characterized in that: The first hole (34) is larger than the diameter of the first pre-tightening member (42), so that the first pre-tightening member (42) does not contact the inner wall of the first hole (34) when rotating along the axis.

10. The retractor device according to claim 9, characterized in that: A first cylindrical hole (51) is provided on the first side wall (53), and the diameter of the first cylindrical hole (51) is greater than the maximum outer diameter of the force limiting component (4), so that the force limiting component (4) can pass through the first cylindrical hole (51).

11. The retractor device according to claim 10, characterized in that: The first side wall (53) is provided with a first positioning structure (52), the clutch tray (3) is provided with a second positioning structure (31), and the first positioning structure (52) is positioned and matched with the second positioning structure (31).

12. The retractor device according to claim 11, characterized in that: The diameter of the first boss (32) is smaller than the diameter of the first tube hole (51), so that the first boss (32) is inserted into the first tube hole (51).

13. The retractor device according to claim 10, characterized in that: The maximum length of the body (33) is greater than the diameter of the first cylindrical hole (51), so that the body (33) abuts against the outer side wall of the frame (5).

14. The retractor device according to claim 1, characterized in that: The clutch support plate (3) is capable of bearing at least part of the axial pressure of the force limiting component (4).

15. The retractor device according to claim 2, characterized in that: The retractor device further comprises a first bracket (2), wherein the first bracket (2) is mounted on the outer side wall of the frame (5), and the first bracket (2) is arranged between the pre-tightening mechanism (1) and the clutch support plate (3).

16. The retractor device according to claim 15, characterized in that: The pre-tightening mechanism (1) comprises a gear (13), and the gear (13) is detachably connected to the first bracket (2).

17. The retractor device according to claim 16, characterized in that: The first bracket (2) is provided with a first groove (23), and part of the gear (13) is suitable for being installed in the first groove (23).

18. The retractor device according to claim 17, characterized in that: The first bracket (2) is provided with a second hole (22), the diameter of the second hole (22) being larger than the diameter of the first preload member (42), so that the first preload member (42) passes through the second hole (22) and is connected to the gear (13).

19. The retractor device according to claim 18, characterized in that The retractor device further comprises a bushing (45), wherein the bushing (45) is suitable for being sleeved on the first pre-tightening member (42).

20. The retractor device according to claim 1, characterized in that The force limiting component (4) comprises a belt reel (46) and a lock seat (47); the belt reel (46) and the lock seat (47) are detachably connected; and the belt reel (46) and the lock seat (47) are made of the same material.

21. The retractor device according to claim 20, characterized in that The material of the belt reel (46) and the lock seat (45) can be aluminum alloy.

22. The retractor device according to claim 21, characterized in that The lock seat (47) is sleeved on the end of the belt reel (46).

23. The retractor device according to claim 22, characterized in that The belt reel (46) further comprises a buffer member (461), wherein the buffer member (461) is arranged between the belt reel (46) and the lock seat (47).

24. The retractor device according to claim 5, characterized in that: A positioning hole (462) is provided at the end of the belt reel (46), and the buffer member (461) is suitable for being placed in the positioning hole (462).

25. The retractor device according to claim 12, characterized in that: The retractor device further comprises a vehicle sensing component (9), wherein the vehicle sensing component (9) is fixed on the outside of the frame (5), and the vehicle sensing component (9) is arranged opposite to the clutch support plate (3).

26. A seat belt device, characterized in that: The invention comprises at least a webbing and a retractor device according to any one of claims 1-25.

27. A seat, characterized in that: The seat includes a seat body and the seat belt device according to claim 26.

28. A vehicle, characterized in that: The vehicle comprises a vehicle body and a seat according to claim 27.

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