Winding mechanism
By introducing a silencer spring and a ratchet limit groove structure into the retracting mechanism, the noise problem of the vehicle sensing component is solved, the silent effect and the normal operation of the seat belt are achieved, and the comfort of passengers is improved.
Patent Information
- Application Number
- CN202422749153.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-11
AI Technical Summary
In existing automobile seat belt retractors, the vehicle sensing component generates noise under vibration conditions, especially near the passenger's ears, which affects passenger comfort and quiet performance.
A retracting mechanism is designed, which adopts a silencer spring to abut against the ratchet. The limit groove and limit segment structure of the silencer spring are used to limit the swing of the vehicle sensing arm, reduce noise generation, and enhance stability through the spring seat made of rubber material.
It effectively suppresses the noise generated by the vehicle sensing components during driving, ensures the quietness in the car, and maintains the normal working performance of the seat belts.
Smart Images
Figure CN223355531U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of automotive equipment, and in particular to a retracting mechanism. Background Art
[0002] As a key component of automotive seatbelts, the retractor provides an emergency locking function, ensuring occupant safety. Its core structure consists of one or more ratchets fixed to the end of the reel and a vehicle sensing component for sensing the vehicle's status. Notably, collisions between the various components of the vehicle sensing component under various vibration conditions are often the primary source of noise in the retractor. Given the retractor's location close to the passenger's ears in some vehicle models, making them particularly sensitive to seatbelt noise, vehicle manufacturers place extremely high demands on the quietness of these seatbelts. Consequently, there is an urgent need to develop a new retractor mechanism that can effectively suppress vehicle-sensing noise while meeting performance standards. Utility Model Content
[0003] An embodiment of the present application provides a retracting mechanism that can effectively suppress vehicle-feeling noise.
[0004] In some embodiments, a reeling mechanism is provided, including a mounting frame, a vehicle sensing assembly and a silencer spring, wherein a reel is rotatably provided on the mounting frame, and a ratchet is provided on the outer peripheral side of the reel; the vehicle sensing assembly is adjacent to the ring side of the ratchet, and the vehicle sensing assembly includes a vehicle sensing arm, and the vehicle sensing arm can swing toward the ratchet on the reel to inhibit the rotation of the reel; the silencer spring includes a first end and a second end arranged opposite to each other, the first end is connected to the mounting frame, and the second end is against the vehicle sensing arm to prevent the vehicle sensing arm from swinging; wherein, a limiting groove is provided on the vehicle sensing arm, and the silencer spring is stuck in the limiting groove, and when the seat belt is pulled out, the reel can drive the silencer spring to rotate and separate from the limiting groove, so that the vehicle sensing arm can swing against the ratchet.
[0005] In some embodiments, the vehicle sensing arm includes a pressure-bearing surface, and a first protrusion and a second protrusion are provided on the vehicle sensing arm. The opposite sides of the first protrusion and the second protrusion and the pressure-bearing surface define the limiting groove, and the second end of the silencer spring is located in the limiting groove and rests on the pressure-bearing surface.
[0006] In some embodiments, when the second end of the muffler spring is in contact with the pressure-bearing surface, the pressure-bearing surface is perpendicular to the tangential direction of the second end rotating around the reel.
[0007] In some embodiments, the first protrusion includes a first limiting section and a second limiting section connected to each other, the limiting groove is defined by the opposite sides of the first limiting section and the second protrusion and the pressure-bearing surface, the second limiting section extends from the first limiting section away from the pressure-bearing surface, and when the seat belt is pulled out, the second end moves along the second limiting section away from the limiting groove.
[0008] In some embodiments, a side of the second limiting section facing the second end of the muffler spring is an arc surface, and the center of the arc surface is collinear with the reel.
[0009] In some embodiments, the noise-damping spring includes a connecting section connected between the first end and the second end, the connecting section is at least partially arc-shaped, and the first end, the second end, and the connecting section are smoothly connected.
[0010] In some embodiments, a spring seat is provided on the mounting frame, a mounting groove is provided on the ring side of the spring seat, the first end of the silencer spring is embedded in the mounting groove, and a gap is maintained between the connecting section of the silencer spring and the mounting frame.
[0011] In some embodiments, the spring seat is a rubber member.
[0012] In some embodiments, the vehicle sensing assembly also includes a vehicle sensing seat, and the vehicle sensing arm includes a locking portion, a cover portion, and a rotating portion connected in sequence, the rotating portion is rotatably connected to the side of the vehicle sensing seat away from the ratchet, the locking portion is adjacent to the ratchet and is arranged opposite to the rotating portion, the connection position between the cover portion and the locking portion forms a bending portion, and the limiting groove is provided in the bent portion.
[0013] In some embodiments, the vehicle sensing seat and the vehicle sensing arm enclose a cavity, the cavity is used to install the driving ball, and the opposite side of the vehicle sensing seat and the cover portion is concave.
[0014] The retracting mechanism provided in the embodiment of the present application is connected to the ratchet by arranging a silencer spring. During the driving of the vehicle, the vehicle sensing arm is constrained by the silencer spring and will not swing arbitrarily and collide with the ratchet to produce noise. The second end of the silencer spring is stuck in the limit groove, which can further prevent the silencer spring from running around during the driving of the vehicle or the silencer spring from colliding with the vehicle sensing arm due to unstable contact with the vehicle sensing arm, thereby ensuring the quietness of the vehicle interior environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0016] Figure 1 This is a schematic diagram of the overall structure of the reeling mechanism in one embodiment of the present application;
[0017] Figure 2 yes Figure 1 A schematic diagram of the partial structure of the reeling mechanism in the embodiment;
[0018] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the embodiment;
[0019] Figure 4 yes Figure 1 Schematic diagram of the connection between the vehicle sensor assembly and the silencer spring in the embodiment;
[0020] Figure 5 yes Figure 1 Schematic diagram of the connection relationship between the silencer spring and the cover body in the embodiment.
[0021] In the above drawings:
[0022] 10. Mounting frame; 11. End plate; 12. Cover;
[0023] 20. Vehicle sensor assembly; 21. Vehicle sensor arm; 211. Locking portion; 212. Covering portion; 213. Rotating portion; 214. Bending portion; 22. Vehicle sensor seat; 23. Limiting groove; 231. Pressure-bearing surface; 232. First protrusion; 2321. First limiting section; 2322. Second limiting section; 233. Second protrusion; 24. Cavity;
[0024] 30. Silencer spring; 31. First end; 32. Second end; 33. Connecting section;
[0025] 40. Spring seat; 41. Mounting slot;
[0026] 50. Seat belt. DETAILED DESCRIPTION
[0027] The present application will be further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only intended to illustrate the present application and are not intended to limit the scope of the present application. Similarly, the following examples are only some examples of the present application and not all examples. All other examples obtained by those of ordinary skill in the art without creative work are intended to fall within the scope of protection of this application.
[0028] The terms "first", "second" and "third" in the embodiments of the present application are used only for descriptive purposes 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", "second" and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, "multiple" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products or devices.
[0029] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0030] See also Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of the reeling mechanism in one embodiment of the present application; Figure 2 yes Figure 1 A schematic diagram of the partial structure of the reeling mechanism in the embodiment; Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the embodiment.
[0031] The embodiment of the present application provides a retracting mechanism, including a mounting frame 10, a vehicle sensing assembly 20, and a silencer spring 30. A reel (not shown) is rotatably provided on the mounting frame 10, and a safety belt 50 is wound on the reel. The reel can be retracted and released by rotating the reel. The mounting frame 10 includes a cover 12 and two end plates 11. The reel is mounted between the two end plates 11, and the safety belt 50 is wound between the two end plates 11 via the reel. A ratchet (not shown) is fixedly connected to the outer peripheral side of the rotating shaft. The ratchet is mounted on the side of one of the end plates 11 facing away from the safety belt 50. The cover 12 is provided on the outside of the ratchet to protect the ratchet, and an opening is provided on the annular side of the cover 12. The vehicle sensing assembly 20 is located at the opening of the cover 12, and the vehicle sensing assembly 20 is adjacent to the annular side of the ratchet. The vehicle sensing assembly 20 includes a vehicle sensing arm 21, which can swing toward the ratchet on the reel to inhibit the reel from rotating. The silencer spring 30 includes a first end 31 and a second end 32, which are arranged opposite each other. The first end 31 is connected to the mounting bracket 10, and the second end 32 abuts against the vehicle sensing arm 21 to prevent the vehicle sensing arm 21 from swinging. The vehicle sensing arm 21 is provided with a retaining groove 23, in which the silencer spring 30 is retained. When the seat belt 50 is pulled out, the reel can drive the silencer spring 30 to rotate and separate from the retaining groove 23, allowing the vehicle sensing arm 21 to swing and abut against the ratchet.
[0032] In this embodiment, a silencer spring 30 is provided to abut against the ratchet, so that during the driving of the vehicle, the vehicle sensing arm 21 is constrained by the silencer spring 30 and will not swing arbitrarily and collide with the ratchet to generate noise, and the second end 32 of the silencer spring 30 is abutted against the limit groove 23, which can further prevent the silencer spring 30 from running around during the driving of the vehicle or the silencer spring 30 from colliding with the vehicle sensing arm 21 due to unstable contact with the vehicle sensing arm 21, thereby ensuring the quietness of the vehicle interior environment.
[0033] See also Figure 3 In some embodiments, the vehicle sensing arm 21 includes a pressure-bearing surface 231, which is provided with a first protrusion 232 and a second protrusion 233. The first protrusion 232, the opposing sides of the second protrusion 233, and the pressure-bearing surface 231 define a retaining groove 23. The second end 32 of the silencer spring 30 is located within the retaining groove 23 and abuts against the pressure-bearing surface 231. The second end 32 of the silencer spring 30 applies pressure to the pressure-bearing surface 231 to limit the swinging of the vehicle sensing arm 21. Furthermore, the second end 32 of the silencer spring 30 is clamped between the opposing sides of the first protrusion 232 and the second protrusion 233, preventing the silencer spring 30 from moving freely during vehicle operation.
[0034] Multiple groups of first protrusions 232 can be arranged at intervals along the axial direction of the reel, and similarly, multiple groups of second protrusions 233 can be arranged at intervals along the axial direction of the reel. In this embodiment, three groups of first protrusions 232 and second protrusions 233 are provided, and the three groups of first protrusions 232 and second protrusions 233 correspond one-to-one to define three groups of limiting grooves 23. It can be understood that due to the spacing between the first protrusions 232 and the second protrusions 233, the three groups of limiting grooves 23 effectively constrain the second end 32 of the silencer spring 30 while reducing the contact area between the silencer spring 30 and the first protrusions 232 and the second protrusions 233, thereby reducing abnormal noise caused by friction. Optionally, the length of the first protrusions 232 and the second protrusions 233 in the axial direction of the reel is 0.5 to 1 cm.
[0035] Furthermore, when the second end 32 of the silencer spring 30 abuts the pressure-bearing surface 231, the pressure-bearing surface 231 is perpendicular to the tangential direction of the second end 32's rotation around the spool. It can be understood that the first end 31 of the silencer spring 30 is connected to the spool and the housing 12, generating a first torque. A moment arm is formed between the second end 32 of the silencer spring 30 and the spool, extending radially along the spool. The pressure-bearing surface 231 provides support to the second end 32 of the silencer spring 30, thereby generating a second torque opposite to the first torque. Because the pressure-bearing surface 231 is perpendicular to the tangential direction of the second end 32's rotation around the spool, the pressure exerted by the pressure-bearing surface 231 on the second end 32 is parallel to the tangential direction. In other words, the pressure exerted by the second end 32 on the pressure-bearing surface 231 is perpendicular to the pressure-bearing surface 231. This ensures that the silencer spring 30 remains stable against the pressure-bearing surface 231 during vehicle operation, preventing the silencer spring 30 from slipping relative to the pressure-bearing surface 231 and generating noise.
[0036] Please continue reading Figure 3 In some embodiments, the first protrusion 232 includes a first limiting section 2321 and a second limiting section 2322 that are connected to each other. The limiting groove 23 is defined by the opposite sides of the first limiting section 2321 and the second protrusion 233 and the pressure-bearing surface 231. The second limiting section 2322 extends from the first limiting section 2321 away from the pressure-bearing surface 231. When the safety belt 50 is pulled out, the second end 32 moves along the second limiting section 2322 away from the limiting groove 23.
[0037] The first protrusion 232 is positioned between the spool and the second protrusion 233. The second end 32 of the silencer spring 30 is constrained on the side of the first protrusion 232 facing away from the spool. By moving the second end 32 of the silencer spring 30 along the second limiting section 2322, the silencer spring 30 maintains contact with the first protrusion 232, preventing the second end 32 of the silencer spring 30 from colliding with the wall of the limiting slot 23 due to the elastic force after the seat belt 50 stops being pulled out. In embodiments where multiple sets of first protrusions 232 are provided, each first protrusion 232 includes a first limiting section 2321. It is sufficient that the first limiting section 2321 of any first protrusion 232 is extended by a second limiting section 2322.
[0038] Furthermore, the side of the second limiting section 2322 facing the second end 32 of the silencer spring 30 is an arc-shaped surface, with the center of the arc-shaped surface coaxial with the reel. Since the second end 32 of the silencer spring 30 rotates about the reel, by configuring the side of the second limiting section 2322 facing the second end 32 as an arc-shaped surface coaxial with the reel, the side of the second limiting section 2322 facing the second end 32 aligns with the rotational trajectory of the silencer spring 30 about the reel. This ensures contact between the second limiting section 2322 and the second end 32 while minimizing its effect on the movement of the second end 32, thereby ensuring the operational performance of the vehicle sensing assembly 20.
[0039] See also Figure 4 , Figure 4 yes Figure 1 Schematic diagram of the connection between the vehicle sensor assembly 20 and the muffler spring 30 in an embodiment. In some embodiments, the muffler spring 30 includes a connecting section 33 connected between a first end 31 and a second end 32. The connecting section 33 is at least partially arcuate, smoothly connecting the first end 31, the second end 32, and the connecting section 33. The arcuate transition design on the muffler spring 30 increases the travel length of the muffler spring 30, reduces the spring force, and prevents excessive spring force from colliding with the vehicle sensor arm 21 and causing unusual noise.
[0040] See also Figure 5 , Figure 5 yes Figure 1Schematic diagram of the connection between the silencer spring 30 and the housing 12 in an embodiment. In some embodiments, a spring seat 40 is provided on the mounting frame 10. The spring seat 40 is fixedly connected to the end of the spool and is located on the end of the housing 12 facing away from the ratchet. A mounting groove 41 is provided on the annular side of the spring seat 40. The first end 31 of the silencer spring 30 is embedded in the mounting groove 41, and a gap is maintained between the connecting section 33 of the silencer spring 30 and the mounting frame 10. Simultaneously, the first end 31 of the silencer spring 30 is also fixedly connected to the housing 12 of the mounting frame 10 to provide torsional force to the second end 32. It should be noted that when the safety belt 50 is extended, the spring seat 40 can rotate relative to the silencer spring 30 and generate sliding friction on the silencer spring 30, thereby driving the second end 32 of the silencer spring 30 away from the limiting groove 23. The second end 32 of the silencer spring 30 is configured to abut against the vehicle sensing arm 21 to provide a force to suppress its swing. This force is relatively small to prevent the silencer spring 30 from interfering with the locking of the vehicle sensing arm 21 and the ratchet. Furthermore, because the driving force for the silencer spring 30 to move away from the retaining slot 23 comes from the friction between the spring seat 40 and the silencer spring 30, as the second end 32 of the silencer spring 30 moves farther from the retaining slot 23, the force exerted on it by the first end 31 to return it also increases. When the friction between the spring seat 40 and the return force of the silencer spring 30 balances, the silencer spring 30 no longer moves away from the retaining slot 23. After the seat belt 50 is pulled out and fastened, it retracts a certain distance, allowing the silencer spring 30 to rotate and reengage within the retaining slot 23.
[0041] In some embodiments, the spring seat 40 is a rubber member. The rubber material has good elasticity, which can further increase the friction between the spring seat 40 and the silencer spring 30, while avoiding hard contact between the spring seat 40 and the silencer spring 30, thereby ensuring a silent effect.
[0042] See also Figure 3 as well as Figure 4 In some embodiments, the vehicle sensing assembly 20 further includes a vehicle sensing seat 22. The vehicle sensing arm 21 is rotatably connected to the seat 22. The seat 22 and the vehicle sensing arm 21 enclose a cavity 24 for mounting a driving ball (not shown). The driving ball can move freely within the cavity 24 and push the vehicle sensing arm 21 to lock with the ratchet. The driving ball has a greater mass than the vehicle sensing arm 21. Even when the muffler spring 30 abuts the vehicle sensing arm 21 and the vehicle accelerates or decelerates suddenly, the driving ball can still push the vehicle sensing arm 21 to lock with the ratchet on the reel. This ensures safety while still meeting the requirements of a quiet driving effect.
[0043] See also Figure 4The vehicle sensing arm 21 includes a locking portion 211, a covering portion 212, and a rotating portion 213, which are connected in sequence. The rotating portion 213 is rotationally connected to the side of the vehicle sensing seat 22 away from the ratchet. The locking portion 211 is located adjacent to the ratchet and opposite the rotating portion 213. A bent portion 214 is formed at the junction of the covering portion 212 and the locking portion 211, and a limiting groove 23 is provided in the bent portion 214. The muffler spring 30 abuts against the side of the bent portion 214 facing away from the cavity 24, forming a moment arm between the bent portion 214 and the rotating portion 213. The rotating portion 213 is located in the middle of the side of the vehicle sensing seat 22 away from the ratchet, and the rotation axis of the rotating portion 213 is parallel to the winding axis. This increases the length of the moment arm between the bent portion 214 and the rotating portion 213. Even if the force exerted by the second end 32 of the muffler spring 30 against the bent portion 214 is relatively small, it can prevent the vehicle sensing arm 21 from swinging randomly during vehicle operation, colliding with the ratchet, and generating abnormal noise.
[0044] Optionally, the side of the vehicle sensor seat 22 facing the cover portion 212 is concave. The driving ball is spherical, and the concave side of the vehicle sensor seat 22 facing the cover portion 212 can engage with the spherical surface of the driving ball in a chiseled manner, thereby reducing friction between the driving ball and the vehicle sensor seat 22 and the vehicle sensor arm 21, thereby reducing noise generated when the driving ball contacts the vehicle sensor seat 22 and the cover portion 212.
[0045] The above descriptions are only some embodiments of the present application and do not limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.
Claims
1. A retracting mechanism, characterized in that: include: A mounting frame, wherein a reel is rotatably provided on the mounting frame, and a ratchet is provided on the outer peripheral side of the reel; a vehicle sensing assembly adjacent to the ring side of the ratchet, the vehicle sensing assembly including a vehicle sensing arm capable of swinging toward the ratchet on the spool to inhibit rotation of the spool; The silencer spring comprises a first end and a second end which are arranged opposite to each other, wherein the first end is connected to the mounting frame, and the second end abuts against the vehicle sensing arm to prevent the vehicle sensing arm from swinging; wherein, The vehicle sensing arm is provided with a limiting groove, and the silencer spring is clamped in the limiting groove. When the seat belt is pulled out, the reel can drive the silencer spring to rotate and separate from the limiting groove, so that the vehicle sensing arm can abut against the ratchet by swinging.
2. The retracting mechanism according to claim 1, characterized in that: The vehicle sensing arm includes a pressure-bearing surface, and a first protrusion and a second protrusion are provided on the vehicle sensing arm. The opposite sides of the first protrusion and the second protrusion and the pressure-bearing surface define the limiting groove, and the second end of the silencer spring is located in the limiting groove and abuts against the pressure-bearing surface.
3. The retracting mechanism according to claim 2, characterized in that: When the second end of the silencer spring abuts against the pressure-bearing surface, the pressure-bearing surface is perpendicular to the tangential direction of the second end rotating around the winding shaft.
4. The retracting mechanism according to claim 2 or 3, characterized in that: The first protrusion includes a first limiting section and a second limiting section connected to each other, the limiting groove is defined by the opposite sides of the first limiting section and the second protrusion and the pressure-bearing surface, the second limiting section extends from the first limiting section away from the pressure-bearing surface, and when the seat belt is pulled out, the second end moves along the second limiting section away from the limiting groove.
5. The retracting mechanism according to claim 4, characterized in that: A side of the second limiting section facing the second end of the silencer spring is in the form of an arc surface, and the center of the arc surface is collinear with the winding axis.
6. The retracting mechanism according to any one of claims 1 to 3, characterized in that: The noise-damping spring includes a connecting section connected between the first end and the second end. The connecting section is at least partially arc-shaped. The first end, the second end, and the connecting section are smoothly connected.
7. The retracting mechanism according to claim 4, characterized in that: A spring seat is provided on the mounting frame, a mounting groove is provided on the ring side of the spring seat, the first end of the silencer spring is embedded in the mounting groove, and a gap is maintained between the connecting section of the silencer spring and the mounting frame.
8. The retracting mechanism according to claim 7, characterized in that: The spring seat is a rubber piece.
9. The retracting mechanism according to any one of claims 1 to 3, characterized in that: The vehicle sensing assembly also includes a vehicle sensing seat, and the vehicle sensing arm includes a locking portion, a cover portion and a rotating portion connected in sequence, the rotating portion is rotatably connected to the side of the vehicle sensing seat away from the ratchet, the locking portion is adjacent to the ratchet and is arranged opposite to the rotating portion, the connection position between the cover portion and the locking portion forms a bending portion, and the limiting groove is provided in the bent portion.
10. The retracting mechanism according to claim 9, characterized in that: The vehicle sensing seat and the vehicle sensing arm enclose a cavity, and the cavity is used to install the driving ball. The opposite side of the vehicle sensing seat and the cover portion is concave.