Rewinding device and vehicle

Abstract

This application provides a winding device and a vehicle, relating to the field of vehicle technology, and aims to solve the problem of how to improve the reliability of the winding device. The winding device includes a housing, a driving member, a driven member, and a clutch assembly. The driving member and the driven member are rotatably connected to the housing. The clutch assembly includes a first clutch, a second clutch, and a transmission assembly. The first clutch is located on the rotating member, the second clutch is located on the driven member, and the transmission assembly is in frictional contact with the housing and engages with the first clutch. When the driving member rotates, it can, with the help of the transmission assembly, switch the first clutch and the second clutch between an engaged state and a first disengaged state, thereby switching the winding device between a locked state and an unlocked state.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a winding device and a vehicle. Background Technology

[0002] In today's increasingly transparent society, people have a clearer understanding of car safety and safety systems, and they are paying more and more attention to car safety products. Safety is the greatest luxury of a car.

[0003] Seat belts play a crucial role in automotive safety systems, especially as a passive safety feature, and have become standard equipment in cars. However, with the development of intelligent vehicles, people have placed higher demands on seat belts.

[0004] When a vehicle encounters danger, the retractable device tightens the seat belt to prevent the driver and passengers from being thrown out of the vehicle and suffering injuries or fatalities. However, in related technologies, the reliability of the retractable device in triggering a hazard is difficult to guarantee. Summary of the Invention

[0005] The purpose of this application is to provide a winding device and vehicle, which aims to solve the problem of how to improve the reliability of the winding device.

[0006] In a first aspect, this application provides a winding device, which includes a housing, a driving member, a driven member, and a clutch assembly. The driving member and the driven member are rotatably connected to the housing. The clutch assembly includes a first clutch, a second clutch, and a transmission assembly. The first clutch is located on the rotating member, the second clutch is located on the driven member, and the transmission assembly is in frictional contact with the housing and cooperates with the first clutch. When the driving member rotates, it can drive the first clutch and the second clutch to switch between an engaged state and a first disengaged state through the transmission assembly, so that the winding device can switch between a locked state and an unlocked state.

[0007] Because the first clutch is located on the driving member and the second clutch is located on the driven member, when the first and second clutches are engaged, the driving member can be connected to the driven member, allowing the retractor to be in a locked state. When the driving member rotates, it can transmit power to the driven member, thereby driving the driven member to rotate and retract the seat belt. When the first and second clutches are disengaged, the transmission connection between the driving and driven members is broken, putting the retractor in an unlocked state. At this time, the driven member is not restricted by the movement of the driving member and can rotate freely relative to the driving member. The occupants can pull the seat belt to adjust its length to ensure driving comfort.

[0008] In this embodiment, the transmission component is in frictional contact with the housing, thus creating friction between them. When the driving member rotates, overcoming this friction is necessary to drive the transmission component to rotate together with the main body. Before overcoming this friction, the transmission component does not rotate synchronously with the driving member, and there is relative motion between them. After overcoming the friction, the transmission component rotates synchronously with the driving member under its power.

[0009] The first clutch is mounted on the main body and can rotate with the driving component. Therefore, when the transmission assembly moves relative to the driving component, there is relative movement between the transmission assembly and the first clutch, which can change the position of the first clutch, thereby changing the connection state between the first clutch and the second clutch. That is, the first clutch and the second clutch switch between the engaged state and the first disengaged state.

[0010] In this way, by controlling the rotation state of the active component, the retractor can switch between locked and unlocked states to provide early warning and tighten the seat belt when the vehicle is in danger, thereby reducing the occurrence of accidents and improving vehicle safety.

[0011] In this embodiment, since the housing provides support and protection for the winding device, its structure and position remain stable during assembly, making it less prone to deformation or misalignment. When the transmission component comes into frictional contact with the housing, the housing provides a stable frictional force to the transmission component, enabling it to change the position of the first clutch, preventing clutch failure, and ensuring the winding device remains consistently in either the locked or unlocked state.

[0012] In this way, the stability and reliability of the winding device can be guaranteed, thereby providing stable safety warnings to drivers and passengers when the vehicle exhibits dangerous behavior, reducing the occurrence of accidents and improving the vehicle's safety performance.

[0013] Optionally, the transmission assembly includes a friction element and a transmission element that are fixedly connected, the friction element making frictional contact with the housing, and the transmission element engaging with the first clutch element.

[0014] Optionally, the transmission assembly also includes a connector connecting the friction member and the transmission member, wherein the friction member and the transmission member are located on opposite sides of the driving member, and the driving member is provided with a clearance hole, and the connector is accommodated in the clearance hole.

[0015] Optionally, the size of the clearance hole is larger than the size of the connecting member in the circumferential direction along the rotation axis of the driving member.

[0016] Optionally, the first clutch element is a pawl, and the second clutch element is a ratchet.

[0017] Optionally, the transmission component includes a first mating part, and the first clutch component includes a second mating part. When the driving component rotates relative to the transmission component in a first direction, it can use the first mating part and the second mating part to engage, thereby driving the first clutch component and the second clutch component to switch from an engaged state to a first disengaged state.

[0018] Optionally, the transmission component includes a third mating part, and the first clutch component includes a fourth mating part. When the driving component rotates relative to the transmission component in the second direction, it can use the third mating part and the fourth mating part to engage, thereby driving the first clutch component and the second clutch component to switch from a first disengaged state to an engaged state.

[0019] Optionally, it also includes a drive member, which is connected to the driven member and is used to drive the driven member to rotate relative to the housing.

[0020] Optionally, when the driving member drives the driven member to rotate relative to the housing in the first direction, it can also drive the first clutch member and the second clutch member to separate, so that the first clutch member and the second clutch member are in a second separated state.

[0021] Optionally, the first clutch element is a pawl, and the second clutch element is a ratchet, with the first direction being the opposite of the stopping direction of the pawl and the ratchet.

[0022] Optionally, the transmission component includes a fifth mating part, and the first clutch component includes a sixth mating part. When the first clutch component and the second clutch component are in a second disengaged state, the fifth mating part and the sixth mating part cooperate to lock the position of the first clutch component.

[0023] Secondly, this application also provides a vehicle that includes the winding device provided in any embodiment of the first aspect.

[0024] It should be noted that the technical effects of the implementation method in the second aspect can be found in the technical effects of the corresponding implementation method in the first aspect, and will not be repeated here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a winding device provided in an embodiment of this application; Figure 3 for Figure 2A partially exploded view of a winding device is shown. Figure 4 This is a schematic diagram of the structure of an active component provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a transmission component provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a friction component provided in an embodiment of this application; Figure 7 for Figure 6 A schematic diagram of the assembly of a friction component and a housing is shown. Figure 8 This is a schematic diagram of the structure of a first clutch element provided in an embodiment of this application; Figure 9 A schematic diagram of the structure of a second clutch and a driven member provided in an embodiment of this application; Figure 10 A schematic diagram of a winding device in a locked state, provided for an embodiment of this application; Figure 11 for Figure 10 The diagram shows a winding device in an unlocked state. Figure 12 for Figure 10 The diagram shows a winding device in a suppressed state.

[0027] Figure label: 1000, vehicle; 100, vehicle body; 200, wheel; 300, winding device; 1. Housing; 2. Driving component; 21. Clearance hole; 22. Positioning pin; 3. Driven component; 4. First clutch component; 41. Positioning hole; 42. Second mating part; 43. Fourth mating part; 44. Sixth mating part; 45. Eighth mating part; 5. Second clutch component; 6. Friction component; 61. Mating hole; 62. Notch; 63. Tension spring; 7. Transmission component; 71. Retaining ring; 72. First mating part; 73. Third mating part; 74. Fifth mating part; 75. Seventh mating part; 8. Connecting component; 9. Return spring; 01. Cover plate; 02. Rotary motor; 03. Motor gear; 04. First reduction gear; 05. Second reduction gear. Detailed Implementation

[0028] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0029] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0030] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0031] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, where the range of similarity is within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0032] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, a gasoline vehicle, etc. The vehicle 1000 may also include sedans, trucks, buses, lorries, engineering vehicles, special-purpose vehicles, etc.

[0033] Vehicle 1000 may include a body 100 and wheels 200. The body 100 is used for passengers to ride in and for carrying goods, and the wheels 200 are mounted under the body 100 to support the body 100 and to roll on the road surface so that vehicle 1000 can move.

[0034] As people's understanding of vehicle safety and safety systems becomes clearer, they are paying more and more attention to vehicle safety products. In vehicle safety systems, seat belts play a crucial role in preventing occupants from being ejected from the vehicle during a collision, thus reducing injuries and fatalities.

[0035] In some embodiments, the seat belt system of the vehicle 1000 may include a seat belt and a retractor 300, the retractor 300 being connected to one end of the seat belt for retracting the seat belt to improve the convenience of the seat belt.

[0036] When vehicle 1000 is in danger, the retraction device 300 can tighten the seat belt to eliminate the gap between the driver and passenger and the seat belt, effectively limiting the displacement of the driver and passenger during the collision and achieving better protection for the driver and passenger.

[0037] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a winding device 300 provided in an embodiment of this application. Figure 3 for Figure 2 The diagram shows a partial exploded view of a winding device 300. In some embodiments, the winding device 300 may include a housing 1, a driving member 2, and a driven member 3, both of which are rotatably connected to the housing 1. The driven member 3 is typically connected to one end of a seatbelt, and rotation of the driven member 3 tightens the seatbelt. The driving member 2 is drive-connected to the driven member 3 to transmit the recovery power to the driven member 3, causing it to move. The housing 1 provides protection and support for the driving member 2 and the driven member 3, and is typically constructed of insulating materials such as plastic.

[0038] With the development of vehicle intelligence, the rewind device 300 is usually equipped with a drive component. The drive component is connected to the drive member 2. Through the control system of vehicle 1000, the drive component can be controlled to output power to make the drive member 2 rotate, so as to drive the driven member 3 to rotate and tighten the seat belt.

[0039] When vehicle 1000 is in danger, the power output by the drive component is transmitted to the driven component 3 through the active component 2, causing the driven component 3 to rotate to retract the seat belt. When vehicle 1000 is in danger or not in danger, if the active component 2 and the driven component 3 are kept connected, the driver and passengers will encounter greater resistance when pulling the seat belt, which is not conducive to the operation of the driver and passengers.

[0040] Therefore, the winding device 300 may further include a clutch assembly, which may include a first clutch 4, a second clutch 5, and a transmission assembly. The first clutch 4 is located on the driving member 2, the second clutch 5 is located on the driven member 3, and the transmission assembly is in frictional contact with the housing 1 and cooperates with the first clutch 4. When the driving member 2 rotates, it can drive the first clutch 4 and the second clutch 5 to switch between an engaged state and a first disengaged state via the transmission assembly, thereby switching the winding device 300 between a locked state and an unlocked state.

[0041] Since the first clutch 4 is located on the driving member 2 and the second clutch 5 is located on the driven member 3, when the first clutch 4 and the second clutch 5 are engaged, the driving member 2 can be connected to the driven member 3 in a transmission manner, so that the winding device 300 can be in a locked state. In this way, when the driving member 2 rotates, power can be transmitted to the driven member 3, thereby driving the driven member 3 to rotate in order to wind up the seat belt.

[0042] When the first clutch 4 and the second clutch 5 are separated, the transmission connection between the driving member 2 and the driven member 3 is disconnected, so that the winding device 300 is in the unlocked state. At this time, the driven member 3 is not restricted by the movement state of the driving member 2 and can rotate freely relative to the driving member 2. The driver and passengers can pull the seat belt to adjust the length of the seat belt to ensure driving comfort.

[0043] In this embodiment, the transmission component is in frictional contact with the housing 1, thus creating friction between them. When the driving member 2 rotates, overcoming this friction is necessary to drive the transmission component to rotate together with the main body. Before overcoming this friction, the transmission component does not rotate synchronously with the driving member 2, and there is relative motion between them. After overcoming the friction, the transmission component rotates synchronously with the driving member 2 under its power.

[0044] The first clutch 4 is mounted on the main body and can rotate with the driving member 2. Therefore, when the transmission assembly moves relative to the driving member 2, there is relative movement between the transmission assembly and the first clutch 4, which can change the position of the first clutch 4, thereby changing the connection state between the first clutch 4 and the second clutch 5. That is, the first clutch 4 and the second clutch 5 switch between the engaged state and the first disengaged state.

[0045] In this way, by controlling the rotation state of the active component 2, the retractor 300 can switch between locked and unlocked states to provide early warning and tighten the seat belt when the vehicle 1000 is in danger, thereby reducing the occurrence of accidents and improving the safety of the vehicle 1000.

[0046] In this embodiment, since the housing 1 provides support and protection for the winding device 300, its structure and position remain stable during assembly, making it less prone to deformation or misalignment. When the transmission component comes into frictional contact with the housing 1, the housing 1 provides a stable frictional force to the transmission component, enabling it to change the position of the first clutch 4, preventing clutch component failure, and ensuring that the winding device 300 remains consistently in either the locked or unlocked state.

[0047] Thus, through the above settings, the stability and reliability of the winding device 300 can be guaranteed, thereby providing stable safety warnings to the driver and passengers when the vehicle 1000 exhibits dangerous behavior, reducing the occurrence of accidents and improving the safety performance of the vehicle 1000.

[0048] In some embodiments, the transmission assembly includes a friction element 6 and a transmission element 7 fixedly connected, the friction element 6 being in frictional contact with the housing 1, and the transmission element 7 engaging with a first clutch element 4.

[0049] By setting independent friction elements 6 and transmission elements 7 in the transmission assembly, frictional force is generated by frictional contact between friction element 6 and housing 1, and power is generated by transmission element 7 cooperating with first clutch element 4 to push the first clutch element 4 to displacement. In this way, the spatial layout of the transmission assembly can be more flexible, the restrictions on the installation position can be reduced, the stability of the interaction between the components can be ensured, thereby reducing the risk of clutch assembly failure and improving the reliability of the winding device 300.

[0050] Furthermore, separating the friction component 6 from the transmission component 7 simplifies the assembly of the transmission components and reduces production difficulty.

[0051] Please refer to Figures 3-5 , Figure 4 This is a schematic diagram of the structure of an active component 2 provided in an embodiment of this application. Figure 5 This is a schematic diagram of the structure of a transmission component 7 provided in an embodiment of this application. In some embodiments, the transmission component further includes a connecting component 8 connected between the friction component 6 and the transmission component 7. The friction component 6 and the transmission component 7 are located on opposite sides of the driving component 2, and the driving component 2 is provided with a clearance hole, and the connecting component 8 is accommodated in the clearance hole.

[0052] Since the driving member 2 is rotatably connected inside the housing 1, and the friction member 6 and the transmission member 7 are located on opposite sides of the driving member 2, one of the friction member 6 and the transmission member 7 can be located between the housing 1 and the driving member 2. Thus, the opposite sides of the driving member 2 can be divided into a transmission side and a positioning side according to their functions. The side connected to the transmission member 7 is the transmission side, and the side connected to the friction member 6 is the positioning side. Through the positioning function of the driving member 2, the friction member 6 can be restricted between the driving member 2 and the housing 1, thereby making the installation between the friction member 6 and the housing 1 more stable.

[0053] Furthermore, the friction element 6 and the transmission element 7 are located on opposite sides of the driving element 2, so that the friction element 6, the driving element 2 and the transmission element 7 can be installed into the housing 1 in sequence, making the installation more stable and accurate, thereby reducing the risk of clutch assembly installation failure and further enhancing the reliability of the winding device 300.

[0054] Please refer to Figures 3-7 , Figure 6 This is a schematic diagram of the structure of a friction element 6 provided in an embodiment of this application. Figure 7 for Figure 6 The diagram shows an assembly schematic of the friction element 6 and the housing 1. In some embodiments, the friction element 6 can be configured as a friction ring, which is coaxial with the rotation axis of the driving element 2. In this way, under the rotation of the driving element 2, the friction ring can keep up with the rotation of the driving element 2, thereby increasing the stability of power transmission.

[0055] In some embodiments, the friction ring may include a notch 62 that extends radially through the friction ring, and the friction ring may also include a tension spring 63 that is tensioned at the notch 62 position, thereby enabling the friction ring to apply pressure to the inner surface of the housing 1 to increase the friction between the housing 1 and the friction ring.

[0056] In other embodiments, the friction between the friction ring and the housing 1 can be increased by increasing the roughness of the friction ring and the housing 1, etc., and this application does not impose further limitations on this.

[0057] In some embodiments, the connector 8 may be fixedly connected to one of the friction member 6 and the transmission member 7, and the other of the friction member 6 and the transmission member 7 may be provided with a structure that cooperates with the connector 8 so that the connector 8 can pass through the clearance hole 21 and connect to the other.

[0058] In some embodiments, the connector 8 may include a connecting post disposed on the side of the transmission member 7 facing the main body, and the friction member 6 may be provided with a mating hole 61. By having the connecting post pass through the clearance hole and engage with the mating hole 61, the friction member 6 and the transmission member 7 can be connected and move synchronously.

[0059] In other embodiments, the friction element 6 and the transmission element 7 can also be connected by means of a snap-fit ​​structure, a bolt structure, or a pin hole fit, so as to achieve synchronous movement between the friction element 6 and the transmission element 7.

[0060] In some embodiments, the size of the clearance hole is larger than the size of the connector 8 in the circumferential direction along the rotation axis of the active member 2.

[0061] Along the circumferential direction of the rotation axis of the active member 2, the size of the clearance hole is larger than the size of the connecting member 8, so that the connecting member 8 can move relative to the active member 2 within the clearance hole. Thus, when the active member 2 rotates, due to the friction between the friction member 6 and the housing 1, the connecting member 8 remains stationary relative to the housing 1, that is, it rotates relative to the main body. At this time, the clearance hole can provide space for the rotation of the connecting member 8.

[0062] At the same time, when the driving member 2 rotates to the edge of the clearance hole and contacts the connecting member 8, the main body can transmit the driving force of the driving component to the connecting member 8, thereby overcoming the friction between the friction member 6 and the housing 1, so that the connecting member 8, the friction member 6 and the transmission member 7 rotate synchronously with the driving member 2.

[0063] In this way, the transmission component can have two states: relative movement with the driving component 2 and synchronous movement with the driving component 2. This allows the clutch component to switch between the engaged state and the first disengaged state, ensuring the stable operation of the winding device 300.

[0064] Please refer to Figures 3-9 , Figure 8 This is a schematic diagram of the structure of a first clutch 4 provided in an embodiment of this application. Figure 9 This is a schematic diagram of the structure of a second clutch 5 and a driven member 3 provided in an embodiment of this application. In some embodiments, the first clutch 4 is a pawl and the second clutch 5 is a ratchet.

[0065] Because the teeth of the ratchet and pawl that mesh with each other are beveled, the ratchet and pawl can only mesh and lock in one direction. That is, when the pawl rotates in the first direction, the pawl can lock with the ratchet and drive the ratchet to rotate. When the pawl rotates in the second direction opposite to the first direction, the pawl will disengage from the ratchet and will not be able to drive the ratchet to rotate.

[0066] In this way, the forward and reverse rotation of the drive component can be controlled to transmit power to the ratchet, so that the ratchet can only tighten the seat belt under the action of the drive component and cannot loosen the seat belt, thus meeting the functional requirements of the rewind device 300.

[0067] By setting the transmission component to adjust the relative position of the pawl, the pawl can be restricted to a state of contact with the ratchet or a state of separation from the ratchet. This ensures that the winding device 300 can be stably engaged during dangerous pre-tensioning and that the safety belt can be freely pulled out and retracted when the winding device 300 does not need to be actively tightened, thus ensuring the reliability of the winding device 300.

[0068] In other embodiments, the first clutch 4 and the second clutch 5 may also be configured to cooperate in a gear rack, slider rail or push rod or other similar manner, and this application does not impose further restrictions on this.

[0069] Please refer to Figures 2-12 , Figure 10 This is a schematic diagram of a winding device 300 in a locked state, provided in an embodiment of this application. Figure 11 for Figure 10 The diagram shown illustrates a winding device 300 in an unlocked state. Figure 12 for Figure 10 The diagram shows a winding device 300 in a suppressed state. In some embodiments, the transmission member 7 includes a first engaging part 72 and the first clutch member 4 includes a second engaging part 42. When the driving member 2 rotates relative to the transmission member 7 in a first direction, it can engage with the first engaging part 72 and the second engaging part 42 to drive the first clutch member 4 and the second clutch member 5 to switch from an engaged state to a first disengaged state.

[0070] When the driving member 2 rotates relative to the transmission member 7 in the first direction, the first clutch member 4, connected to the driving member 2, can also rotate relative to the transmission member 7 in the first direction. Thus, there is a relative force between the first mating part 72 and the second mating part 42. Through the relative action of the first mating part 72 and the second mating part 42, the first clutch member 4 can be displaced on the driving member 2, thereby switching the first clutch member 4 and the second clutch member 5 from an engaged state to a first disengaged state.

[0071] In some embodiments, the first clutch 4 may include a body and a positioning hole 41 disposed on the body. The body is provided with a positioning post 22 on the side facing the transmission member 7, and the positioning hole 41 passes through the positioning post 22 so that the body can rotate around the positioning post 22.

[0072] In this way, when the transmission component 7 applies a relative force to the first clutch component 4, it can push the position of the first clutch component 4 to change, thereby switching the first clutch component 4 and the second clutch component 5 between the engaged state and the first disengaged state.

[0073] In some embodiments, the second mating part 42 is disposed at the end of the body away from the second clutch 5, so that when the first mating part 72 applies a force to the second mating part 42, the body can rotate around the positioning post 22, thereby separating the first clutch 4 and the second clutch 5.

[0074] For example, the first clutch 4 is a pawl and the second clutch 5 is a ratchet. When the pawl and the ratchet are in the engaged state, the teeth of the pawl and the ratchet are engaged. When the first mating part 72 pushes the end of the pawl away from the ratchet to rotate, and the pawl and the ratchet can only engage in one direction, the pawl will disengage from the ratchet to release the engagement state of the two.

[0075] In some embodiments, the transmission member 7 may include a fixed ring 71 connected to the connecting member 8. The fixed ring 71 is disposed on the side of the first clutch member 4 away from the second clutch member 5, so that the driving member 2 can drive the fixed ring 71 to rotate about the rotation axis of the driving member 2.

[0076] In some embodiments, the second mating part 42 may include a protrusion disposed at one end of the body away from the second clutch 5, and the first mating part 72 may include a mating block disposed inside the fixing ring 71, wherein the surface of the mating block is provided with a first stepped surface and a second stepped surface, and along the radial direction of the fixing ring 71, the distance from the first stepped surface to the rotation axis of the main body is less than the distance from the second stepped surface to the rotation axis of the main body.

[0077] When the first clutch 4 and the second clutch 5 are engaged, the protrusion engages with the first stepped surface. When the driving member 2 rotates relative to the transmission member 7 in the first direction, the protrusion rotates relative to the mating block in the first direction and slides from the first stepped surface to the second stepped surface, so that the protrusion engages with the second stepped surface.

[0078] Since the distance from the first stepped surface to the rotation axis of the main body is less than the distance from the second stepped surface to the rotation axis of the main body along the radial direction of the fixed ring 71, when the protrusion slides from the first stepped surface to the second stepped surface, the protrusion rotates around the positioning post 22 in a direction closer to the rotation axis of the main body, thereby driving the ratchet of the first clutch 4 to rotate in a direction away from the rotation axis of the main body, that is, the first clutch 4 and the second clutch 5 can be separated.

[0079] In some embodiments, the surface of the protrusion is set as an arc surface, and the connecting surface between the first stepped surface and the second stepped surface matches the contour of the arc surface. In this way, when the protrusion rotates relative to the mating block in the first direction, the rotation of the protrusion can be made smoother, avoiding jamming that would cause the first clutch 4 to directly drive the transmission component 7 to rotate and prevent the first clutch 4 and the second clutch 5 from separating.

[0080] In some other embodiments, the cooperation between the first mating part 72 and the second mating part 42 can also be achieved by means of groove block cooperation, push rod structure, etc., and this application does not further limit it.

[0081] In some embodiments, the transmission member 7 includes a third engaging portion 73, and the first clutch member 4 includes a fourth engaging portion 43. When the driving member 2 rotates relative to the transmission member 7 in the second direction, it can engage with the fourth engaging portion 43 by means of the third engaging portion 73 to drive the first clutch member 4 and the second clutch member 5 to switch from the first disengaged state to the engaged state.

[0082] When the driving member 2 rotates relative to the transmission member 7 in the second direction, the first clutch member 4, connected to the driving member 2, can also rotate relative to the transmission member 7 in the second direction. Thus, there is a relative force between the third mating part 73 and the fourth mating part 43. Through the relative action of the third mating part 73 and the fourth mating part 43, the first clutch member 4 can be displaced on the driving member 2, thereby switching the first clutch member 4 and the second clutch member 5 from the first disengaged state to the engaged state.

[0083] In some embodiments, the first clutch member 4 includes a receiving groove disposed between the positioning hole 41 and the ratchet, and the third mating part 73 may include a pawl disposed inside the retaining ring 71, at least a portion of which is received within the receiving groove. The size of the receiving groove is larger than the size of the pawl along the circumferential direction of the rotation axis of the main body member, and the pawl can move within the receiving groove when the main body member rotates relative to the transmission member 7.

[0084] In some embodiments, the fourth mating part 43 may include a guide slope disposed on the side of the receiving groove near the positioning hole 41. When the main body rotates relative to the transmission member 7 in the second direction, the first clutch member 4 can rotate relative to the transmission member 7 in the second direction. The guide slope gradually approaches the pawl, and the pawl moves relative to the guide slope. Under the action of the guide slope, the first clutch member 4 can rotate one side of the ratchet around the positioning post 22 in the direction close to the rotation axis of the main body. That is, the first clutch member 4 and the second clutch member 5 can be engaged.

[0085] In this way, when the main body rotates relative to the transmission component 7 in the second direction, the interaction between the guide slope and the pawl enables the first clutch component 4 and the second clutch component 5 to switch from the first disengaged state to the engaged state.

[0086] In some embodiments, the transmission member 7 further includes a seventh mating part 75, and the first clutch member 4 further includes an eighth mating part 45. When the first clutch member 4 and the second clutch member 5 are in a first disengaged state, the seventh mating part 75 and the eighth mating part 45 cooperate to lock the position of the first clutch member 4.

[0087] In this way, when the first clutch 4 and the second clutch 5 are separated, the first clutch 4 and the second clutch 5 can be locked in the first separated state through the cooperation of the seventh mating part 75 and the eighth mating part 45, thereby preventing the first clutch 4 from being displaced due to the rotation of the second clutch 5, or from colliding with other components due to the vibration and bumps of the vehicle 1000.

[0088] In some embodiments, the winding device 300 further includes a drive member connected to the driven member 3 and used to drive the driven member 3 to rotate relative to the housing 1.

[0089] The driving component can directly drive the driven component 3 to rotate relative to the housing 1. In this way, in the event of a dangerous situation, the seat belt can be tightened quickly without the influence of other transmission components, eliminating the gap between the seat belt and the driver and passengers, and counteracting the inertia of the driver and passengers, thus preventing the driver and passengers from flying out of the vehicle 1000 and causing injury or death.

[0090] In some embodiments, when the driving member drives the driven member 3 to rotate relative to the housing 1 in the second direction, it can also drive the first clutch member 4 to separate from the second clutch member 5, so that the first clutch member 4 and the second clutch member 5 are in a second separated state.

[0091] When the driving member 2 rotates relative to the transmission member 7 in the second direction, it can switch the first clutch member 4 and the second clutch member 5 from the first disengaged state to the engaged state. As the driving member 2 continues to rotate in the second direction, it can drive the driven member 3 to rotate in the second direction, thereby causing the driven member 3 to tighten the seat belt.

[0092] At this time, the first clutch 4 applies a force toward the second direction to the second clutch 5, and the second clutch 5 applies a reaction force toward the first clutch 4 in the opposite direction, thereby engaging the first clutch 4 and the second clutch 5.

[0093] When the driving member drives the driven member 3 to rotate relative to the housing 1 in the second direction, the second clutch 5 applies a force in the second direction to the first clutch 4. Due to the one-way engagement characteristic between the first clutch 4 and the second clutch 5, the second clutch 5 cannot engage with the first clutch 4 when the driven member 3 rotates in the second direction. Furthermore, due to the rapid rotation of the second clutch 5, the first clutch 4 is easily thrown away from the second clutch 5, that is, the first clutch 4 and the second clutch 5 are separated, and the device is in a second separation state. At this time, the winding device 300 is in a suppressed state, and the movement of the driving member 2 cannot interfere with the movement of the driven member 3, ensuring the smooth start of the pretensioning system.

[0094] In this way, the first clutch 4 can be prevented from interfering with the rotation of the driven member 3 when the driving member applies driving force to the driven member 3 to make the driven member 3 rotate rapidly, thereby ensuring that the seat belt can be smoothly retracted in dangerous situations and maximizing the safety of the driver and passengers.

[0095] In some embodiments, the drive member can be configured as a pyrotechnic gas generator. When the vehicle 1000 is involved in a collision, the pyrotechnic gas generator is ignited, causing the driven member 3 to rotate rapidly in the second direction, tightening the seat belt to secure the driver in the seat and ensure the driver's safety.

[0096] In some embodiments, when the first clutch 4 is a pawl and the second clutch 5 is a ratchet, the second direction is consistent with the opposite direction of the clamping direction of the pawl and the ratchet.

[0097] In this way, when the ratchet rotates in the second direction, the ratchet and pawl cannot be locked together, allowing the ratchet to slide relative to the pawl, thus putting the ratchet and pawl in a second disengaged state.

[0098] In some embodiments, the transmission member 7 includes a fifth mating part 74, and the first clutch member 4 includes a sixth mating part 44. When the first clutch member 4 and the second clutch member 5 are in a second disengaged state, the fifth mating part 74 and the sixth mating part 44 cooperate to lock the position of the first clutch member 4.

[0099] The fifth mating part 74 and the sixth mating part 44 cooperate to lock the position of the first clutch 4, which can prevent the first clutch 4 from shifting during severe impacts and bumps, causing the first clutch 4 and the second clutch 5 to engage, thus forcing the winding device 300 to stop tightening. This ensures the safety and reliability of the winding device 300.

[0100] In some embodiments, the fifth mating part 74 includes an elastic hook disposed on the side of the claw facing the guide slope, and the sixth mating part 44 includes a side wall located between the receiving groove and the positioning hole 41 facing the rotation axis of the active member 2.

[0101] When the driven member 3 rotates rapidly in the second direction under the action of the driving member, the first clutch member 4 is ejected, the hook and the guide slope are relatively close, and the elastic hook retracts away from the guide slope under the compression of the guide slope. When the first clutch member 4 continues to rotate, the receiving groove rotates relative to the elastic hook in the direction away from the rotation axis of the driving member 2. When the receiving groove moves to the side of the elastic hook away from the rotation axis of the driving member 2, the elastic hook quickly resets and abuts against the side wall of the receiving groove and the positioning hole 41 facing the rotation axis of the driving member 2, so as to lock the first clutch member 4 on the outside of the elastic hook and prevent the first clutch member 4 from engaging with the second clutch member 5.

[0102] In some embodiments, a plurality of first clutches 4 may be provided, and the plurality of first clutches 4 are arranged circumferentially at intervals along the rotation axis of the driving member 2. The transmission member 7 may include a plurality of first mating parts 72 and / or second mating parts 42, and the number of the plurality of first mating parts 72 and / or second mating parts 42 is consistent with the number of the plurality of first clutches 4 and corresponds one-to-one. In this way, the stability of the winding device 300 in switching between the locked state, the unlocked state and the suppressed state can be enhanced.

[0103] In some embodiments, the winding device 300 may further include a return spring 9, which may be connected between the driving member 2 and the transmission member 7. When the winding device 300 switches from a locked state to an unlocked state, the return spring 9 can be tensioned. When the winding device 300 switches from an unlocked state to a locked state, the elastic recovery of the return spring 9, along with the reverse force of the auxiliary drive component, allows the transmission member 7 to return to its initial position.

[0104] In some embodiments, multiple reset springs 9 may be provided to enhance the reset force and save power of the drive device.

[0105] In some embodiments, the housing 1 may be provided with a receiving cavity for accommodating the driving member 2 and the transmission assembly. The receiving cavity has an opening, which can increase the ease of installation of the winding device 300.

[0106] In some embodiments, the winding device 300 may further include a cover plate 01, which covers the opening to protect the components inside the receiving cavity.

[0107] In some embodiments, the driving element 2 may be configured as a main gear, and the driving assembly may include a rotary motor 02 and a reduction gear that is connected between the rotary motor 02 and the main gear.

[0108] In some embodiments, the speed reduction device may be configured as a gear, pulley, ball screw or friction wheel, etc., and this application does not limit it.

[0109] In some embodiments, the speed reduction device may include a motor gear 03 connected to the output shaft of the rotary motor 02, a first speed reduction gear 04 cooperating with the motor gear 03, and a second speed reduction gear 05 coaxially arranged with the first speed reduction gear 04, wherein the second speed reduction gear 05 cooperates with the main gear.

[0110] In this way, two-stage reduction can be achieved through the motor gear 03, the first reduction gear 04, the second reduction gear 05 and the main gear, increasing the output torque of the drive assembly to drive the winding device 300 to wind up the safety belt.

[0111] In some embodiments, the speed reduction device may also be configured as a three-stage transmission device, a multi-stage transmission device, or a worm gear speed reduction device, etc., and this application does not further limit it.

[0112] The retractable device 300 provided in this application embodiment can switch from an unlocked state to a locked state when the vehicle 1000 exhibits dangerous behavior or when a collision is predicted, such as when the vehicle 1000 is traveling too fast or experiencing severe bumps. This tightens the seatbelt to alert the driver and reduce the risk of danger. When the danger to the vehicle 1000 is over, the retractable device 300 can return from the locked state to the unlocked state, ensuring smooth seatbelt operation. If the danger to the vehicle 1000 persists and a collision occurs, a pyrotechnic gas generator can be instantly ignited to drive the retractable device 300 to quickly switch to a restraint state and rapidly tighten the seatbelt, ensuring that the occupants are secured in their seats and reducing the risk of injury. After the accident is resolved, the occupants can control the rotary motor 02 to reverse, releasing the first clutch 4 from the second disengaged state, restoring the retractable device 300 to the unlocked state and ensuring its normal function.

[0113] The above settings can maximize vehicle safety and ensure the safety of passengers.

[0114] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0115] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A winding device, characterized in that, include: Shell (1); Both the driving member (2) and the driven member (3) can be rotatably connected to the housing (1); The clutch assembly includes a first clutch (4), a second clutch (5), and a transmission assembly. The first clutch (4) is located on the driving member (2), and the second clutch (5) is located on the driven member (3). The transmission assembly is in frictional contact with the housing (1) and cooperates with the first clutch (4). When the active component (2) rotates, it can drive the first clutch (4) and the second clutch (5) to switch between an engaged state and a first disengaged state by means of the transmission assembly, so that the winding device can switch between a locked state and an unlocked state.

2. The winding device according to claim 1, characterized in that, The transmission assembly includes a friction element (6) and a transmission element (7) fixedly connected. The friction element (6) is in frictional contact with the housing (1), and the transmission element (7) cooperates with the first clutch element (4).

3. The winding device according to claim 2, characterized in that, The transmission assembly further includes a connector (8) connecting the friction member (6) and the transmission member (7). The friction member (6) and the transmission member (7) are located on opposite sides of the active member (2), and the active member (2) is provided with a clearance hole. The connector (8) is accommodated in the clearance hole.

4. The winding device according to claim 3, characterized in that, The size of the clearance hole is larger than the size of the connector (8) along the circumferential direction of the rotation axis of the active member (2).

5. The winding device according to claim 2, characterized in that, The first clutch component (4) is a pawl, and the second clutch component (5) is a ratchet.

6. The winding device according to claim 5, characterized in that, The transmission component (7) includes a first mating part (72), and the first clutch component (4) includes a second mating part (42). When the driving component (2) rotates relative to the transmission component (7) in a first direction, it can use the first mating part (72) and the second mating part (42) to engage and engage the first clutch component (4) and the second clutch component (5) to switch from an engaged state to a first disengaged state. And / or, the transmission member (7) includes a third mating part (73), and the first clutch member (4) includes a fourth mating part (43). When the driving member (2) rotates relative to the transmission member (7) in the second direction, it can cooperate with the third mating part (73) and the fourth mating part (43) to drive the first clutch member (4) and the second clutch member (5) to switch from a first disengaged state to an engaged state.

7. The winding device according to claim 1, characterized in that, It also includes a drive member connected to the driven member (3) and used to drive the driven member (3) to rotate relative to the housing (1).

8. The winding device according to claim 7, characterized in that, When the driving member drives the driven member (3) to rotate relative to the housing (1) in the second direction, it can also drive the first clutch (4) to separate from the second clutch (5), so that the first clutch (4) and the second clutch (5) are in a second separation state.

9. The winding device according to claim 8, characterized in that, The first clutch component (4) is a pawl, the second clutch component (5) is a ratchet, and the second direction is the opposite direction to the clamping direction of the pawl and the ratchet; And / or, the transmission member (7) includes a fifth mating part (74), and the first clutch member (4) includes a sixth mating part (44). When the first clutch member (4) and the second clutch member (5) are in a second disengaged state, the fifth mating part (74) and the sixth mating part (44) cooperate to lock the position of the first clutch member (4).

10. A vehicle, characterized in that, Includes the winding device (300) according to any one of claims 1-9.

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