WO2024109805A1 - 安全带限力器和汽车 - Google Patents

安全带限力器和汽车 Download PDF

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Publication number
WO2024109805A1
WO2024109805A1 PCT/CN2023/133248 CN2023133248W WO2024109805A1 WO 2024109805 A1 WO2024109805 A1 WO 2024109805A1 CN 2023133248 W CN2023133248 W CN 2023133248W WO 2024109805 A1 WO2024109805 A1 WO 2024109805A1
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WO
WIPO (PCT)
Prior art keywords
stop
pawl
belt
force limiter
hole
Prior art date
Application number
PCT/CN2023/133248
Other languages
English (en)
French (fr)
Inventor
沈惠发
Original Assignee
采埃孚汽车科技(上海)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 采埃孚汽车科技(上海)有限公司 filed Critical 采埃孚汽车科技(上海)有限公司
Publication of WO2024109805A1 publication Critical patent/WO2024109805A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B60R22/40—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B60R22/415—Belt retractors, e.g. reels self-locking in an emergency with additional means allowing a permanent locking of the retractor during the wearing of the belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up

Definitions

  • the present application mainly relates to the technical field of seat belts, and in particular to a seat belt force limiter and a car.
  • the seat belt force limiter plays an important role in protecting the safety of the passengers.
  • the length of the seat belt gradually increases, and the force applied by the seat belt force limiter to the seat belt also increases, causing the restraining force applied by the seat belt to the passengers to increase.
  • the force limiter inside the seat belt force limiter twists and deforms, and the webbing can continue to be pulled out, and the passengers continue to move forward.
  • the movement of the occupants' chests should be between 100mm and 300mm. In order to meet the requirements of the regulations, the movement of the occupants' chests should be limited.
  • the technical problem to be solved by the present application is to provide a seat belt force limiter and a car, wherein the seat belt force limiter can ensure that the movement amount of the passenger's chest meets the requirements.
  • a seat belt force limiter comprising: a bracket having a through hole, the inner circumference of the through hole having a ratchet; a belt reel, the belt reel passes through the through hole and is rotatably arranged on the bracket, the belt reel having a stop pawl accommodating portion; a stop bolt, which is connected to the belt reel in an axial transmission connection with the belt reel; a stop nut, which is connected to the belt reel in a transmission connection, and the inner circumference of the stop nut is threadedly connected to the stop bolt; a stop pawl, which is arranged in the stop pawl accommodating portion, the stop pawl has a pawl facing the ratchet and an elastic component arranged between the stop pawl accommodating portion and the pawl, the elastic component normally applies a force toward the ratchet to the pawl; a stop latch, which is axially inserted between the belt reel and the stop nut
  • the stop nut has a plurality of protrusions located on its outer circumferential surface and protruding radially.
  • the stop nut has a connecting hole extending in the axial direction, and the connecting hole is arranged on any one of the protrusions, wherein one end of the stop latch is arranged in the connecting hole.
  • the belt drum has a stop nut accommodating hole
  • the stop nut accommodating hole has a plurality of grooves located on its inner circumference and recessed radially outward, wherein the plurality of protrusions are keyed to the plurality of grooves to achieve a transmission connection between the stop nut and the belt drum.
  • the belt reel has a through hole extending along its axial direction, and one end of the stop latch passes through the through hole and presses against the pawl to prevent the pawl from engaging with the ratchet wheel.
  • the stopping pawl has a supporting portion, and the supporting portion is arranged opposite to the pawl, wherein when the pawl is engaged with the ratchet wheel, the supporting portion is located in the stopping pawl accommodating portion.
  • a force limiting rod is further included, one end of which is drivingly connected to the belt reel, and the other end of which is drivingly connected to the stop bolt.
  • the belt reel has a force-limiting rod accommodating hole extending in the axial direction, wherein one end of the force-limiting rod passes through the force-limiting rod accommodating hole and is drivingly connected to the belt reel.
  • the outer circumference of the tape reel has a plurality of grooves.
  • the present application also proposes a car, which includes the seat belt force limiter as described above.
  • the seat belt force limiter of the present application can, in the event of a collision, pull the stop latch away from the stop claw after the belt reel rotates a preset number of times, so that the stop claw engages with the ratchet on the bracket, thereby achieving the function of forcibly stopping the withdrawal of the seat belt.
  • FIG1 is a perspective schematic diagram of a seat belt force limiter according to an embodiment of the present application.
  • FIG2 is an exploded view of a seat belt force limiter according to an embodiment of the present application.
  • FIG3 is a cross-sectional schematic diagram of a seat belt force limiter according to an embodiment of the present application.
  • FIG4 is a front view schematic diagram of a stop nut according to an embodiment of the present application.
  • FIG. 5 is a cross-sectional schematic diagram of a seat belt force limiter according to an embodiment of the present application.
  • the seat belt force limiter of the present application can forcibly stop the seat belt from being withdrawn after the seat belt has been withdrawn a preset distance, thereby ensuring that the movement amount of the occupant's chest meets the requirements.
  • FIG1 is a perspective view of a force limiter according to an embodiment of the present application
  • FIG2 is an exploded view of a seat belt force limiter according to an embodiment of the present application
  • the seat belt force limiter 100 includes a bracket 110, a belt reel 120, a stop bolt 130, a stop nut 140, a stop claw 150, a stop latch 160, and a force limiter rod 170.
  • one end of the force limiter rod 170 is connected to the belt reel 120, and the other end is connected to the belt reel 120.
  • the end is connected to the stop bolt 130, the inner circumference of the stop nut 140 is threadedly connected to the outer circumference of the stop bolt 130, the stop pawl 150 is arranged in the stop pawl accommodating portion of the belt reel 120, and the stop latch 160 is axially penetrated between the belt reel 120 and the stop nut 140, and presses against the pawl of the stop pawl 150 to prevent the pawl from engaging with the ratchet on the bracket 110.
  • the belt drum 120, the stop bolt 130 and the stop nut 140 rotate synchronously, and the two ends of the force-limiting rod 170 are respectively connected to the belt drum 120 and the stop bolt 130, and the force-limiting rod 170 is also driven by the belt drum 120 and the stop bolt 130 to rotate around its own axis, and the stop latch 170 also rotates with the belt drum 120 and the stop nut 140.
  • the stop bolt 130 is locked and immobilized, the belt drum 120, the stop nut 140 and the force-limiting rod 170 rotate, and the stop latch 160 rotates with the belt drum 120 and the stop nut 140.
  • the stop nut 140 When the stop nut 140 rotates, the stop nut 140 simultaneously moves along the axial direction of the tape reel 120 toward the stop bolt 130, and drives the stop latch 160 connected thereto to move along the axial direction of the tape reel 120 toward the stop bolt 130.
  • the stop latch 160 When the tape reel 120 rotates a preset number of circles, the stop latch 160 is pulled away from the stop pawl 150, so that the pawl of the stop pawl 150 engages with the ratchet on the frame 110, preventing the tape reel 120 from continuing to rotate.
  • FIG3 is a cross-sectional schematic diagram of a seat belt force limiter according to an embodiment of the present application, and the perspective of the cross-sectional view is the left perspective in FIG1.
  • the bracket 110 has a first through hole 111, and as shown in FIG3, the inner circumference of the first through hole 111 has a ratchet 111a.
  • the bracket 110 also has a second through hole 112.
  • the belt reel 120 is inserted into the first through hole 111 and the second through hole 112 of the bracket 110.
  • the tape reel 120 is rotatably arranged on the bracket 110 by passing through the first through hole 111 and the second through hole 112 of the bracket.
  • a safety belt (not shown) can be wound around the outer surface of the tape reel 120. When the safety belt is pulled, the safety belt drives the tape reel 120 to rotate.
  • the tape reel 120 has a stop claw accommodating portion 121. Referring to FIG. 3 , the stop claw accommodating portion 121 can be used to accommodate the stop claw 150. In FIG. 3 , the stop claw accommodating portion 121 has a step 121a, and the stop claw 150 has a step 152 matching therewith.
  • the steps of the two are matched, so that the stability of the stop claw 150 can be maintained. It can be understood that the shape of the stop accommodating portion in the present application and the matching method between it and the stop claw are not limited to the above-mentioned embodiment.
  • the outer circumference of the belt reel 120 has a plurality of grooves 122.
  • the material used for the belt reel 120 can be reduced, thereby reducing the cost and weight of the seat belt force limiter.
  • the stop bolt 130 is connected to the belt reel 120 in an axial transmission manner.
  • the first end 171 and the second end 172 of the force-limiting rod 170 are both provided with splines, and the first end 171 and the second end 172 are respectively connected to the stop bolt 130 and the belt reel 120 in a transmission manner.
  • a groove matching the spline of the first end 171 is provided at the bottom of the hole 131 of the stop bolt 130. After the force-limiting rod 170 is connected to the stop bolt 130, the spline of the first end 171 matches the groove in the hole 131, so that the transmission connection between the force-limiting rod 170 and the stop bolt 130 can be achieved.
  • the belt drum 120 has a force limiting rod accommodating hole (not shown) extending in the axial direction, and the bottom of the force limiting rod accommodating hole has a groove matching the spline of the second end 172.
  • the spline of the second end 172 matches the groove at the bottom of the force limiting rod accommodating hole, thereby realizing a transmission connection between the force limiting rod 170 and the belt drum 120.
  • the belt reel 120 drives the stop bolt 130 to rotate together through the force limiting rod 170.
  • the stop bolt 130 is locked.
  • the belt reel 120 can continue to apply torque to the stop bolt 130 through the force limiting rod 170, the stop bolt 130 cannot rotate because the stop bolt 130 is locked.
  • the stop nut 140 is in transmission connection with the tape reel 120, and the inner circumference 141 of the stop nut 140 is threadedly connected with the outer circumference 132 of the stop bolt 130.
  • the stop nut 140 rotates and simultaneously moves toward the stop bolt 130 along the axial direction of the tape reel 120.
  • FIG4 is a schematic front view of a stop nut according to an embodiment of the present application.
  • the stop nut 140 has a plurality of protrusions 143 located on its outer circumferential surface 142 and protruding radially.
  • the tape reel 120 has a stop nut receiving hole (not shown), and the stop nut receiving hole has a plurality of grooves located on its inner circumferential surface and recessed radially outward.
  • the plurality of protrusions 143 of the stop nut 140 are keyed with the grooves in the stop nut receiving hole, so that when the tape reel 120 rotates, the stop nut 140 rotates accordingly.
  • the number and shape of the protrusions 143 in FIG4 are merely exemplary, and the number, shape and specific position of the protrusions 143 on the outer circumferential surface in FIG4 can be changed as required.
  • the stop nut 140 has a connecting hole 144 extending in the axial direction.
  • the connecting hole is provided on any one of the protrusions 143 , and one end of the stop latch can be connected to the connecting hole 144 .
  • the stop latch 160 is axially disposed between the belt reel 120 and the stop nut 140.
  • the connection between the stop latch, the belt reel and the stop nut will be described in detail through an embodiment.
  • FIG5 is a cross-sectional schematic diagram of a seat belt force limiter according to an embodiment of the present application, with reference to FIG5.
  • the stop latch 160 can be connected to the stop nut 140 by setting its first end 161 in the connection hole of the stop nut 140. It should be noted that the connection between the first end 161 and the stop nut 140 can achieve that the stop nut 140 drags the stop latch 160 to move axially toward the stop bolt 130.
  • the tape reel 120 has a through hole 123 extending along its axial direction.
  • the stop latch 160 is disposed in the through hole 123. When the tape reel 120 rotates, the stop latch 160 rotates accordingly.
  • the belt reel can drive the stop nut to rotate, and then the stop nut drives the stop latch to move axially toward the stop bolt.
  • the stop pawl 150 is disposed in the stop pawl accommodation portion 121, and the stop pawl 150 has a pawl 151 facing the ratchet wheel 111a.
  • the ratchet wheel 111a faces an elastic component (not shown) disposed between the stop pawl accommodation portion and the ratchet wheel 151, and the elastic component normally applies a force toward the ratchet wheel 111a to the ratchet wheel 111a.
  • the stop pawl 150 has a support portion 153 disposed opposite to the ratchet wheel 151.
  • the ratchet wheel 111a can be engaged with the ratchet wheel 111a.
  • the support portion 153 is located in the stop pawl accommodating portion, thereby forming a situation where "the end of the pawl 151 in the stop pawl 150 is engaged with the ratchet 111a of the bracket 110, and the end of the support portion 153 is located in the belt reel 120". Since the bracket 110 is fixed, the stop pawl 150 can prevent the belt reel 120 from rotating, thereby limiting the withdrawal of the seat belt.
  • the second end 162 of the stop latch 160 passes through the through hole 123 of the belt reel 120 and presses against the pawl 151 to prevent the pawl 151 from engaging with the ratchet 111a under the action of elastic force.
  • the stop bolt 130 is locked, the occupant moves forward due to inertia and pulls out the seat belt, thereby driving the belt reel 120 to rotate.
  • the stop nut 140 drives the stop latch 160 to be pulled away from the pawl 151, so that the pawl 151 engages with the ratchet 111a, preventing the belt reel 120 from rotating.
  • the present application does not limit the preset number of turns.
  • the preset number of turns can be calculated according to the belt withdrawal distance specified by laws and regulations.
  • the seat belt force limiter in the above embodiment can achieve the function of forcibly stopping the withdrawal of the seat belt by pulling the stop latch away from the stop claw, so that the stop claw engages with the ratchet on the bracket.
  • the present application also provides a car, which includes the seat belt force limiter as described above.
  • the seat belt force limiter of the above car can achieve the function of forcibly stopping the withdrawal of the seat belt by pulling the stop latch away from the stop claw, so that the stop claw is engaged with the ratchet on the bracket.
  • the present application uses specific words to describe the embodiments of the present application.
  • “one embodiment”, “an embodiment”, and/or “some embodiments” refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that “one embodiment” or “an embodiment” or “an alternative embodiment” mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment.
  • some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.
  • numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about”, “approximately” or “substantially” in some examples. Unless otherwise specified, “about”, “approximately” or “substantially” indicate that the numbers are allowed to vary by ⁇ 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values is as accurate as possible within the feasible range.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

一种安全带限力器，该限力器包括：支架（110），具有通孔（111），通孔的内周面具有棘轮（111a）；卷带筒（120），卷带筒（120）具有停止爪容纳部（121）；停止螺栓（130），与卷带筒（120）在卷带筒（120）的轴向传动连接；停止螺母（140），与卷带筒（120）传动连接，且停止螺母（140）的内周面与停止螺栓（130）之间螺纹连接；停止爪（150），设于停止爪（150）容纳部（121）内，停止爪（150）具有朝向棘轮（111a）的棘爪（151），弹性部件常态地向棘爪（151）施加朝向棘轮（111a）的力；停止闩（160），沿轴向穿设于卷带筒（120）与停止螺母（140）之间，且压抵棘爪（151）以阻止棘爪（151）与棘轮（111a）啮合；当停止螺栓（130）锁止时，卷带筒（120）带动停止螺母（140）同步转动预设圈数后，停止螺母（140）带动停止闩沿停止螺栓（130）向远离棘爪（151）的方向移动以将停止闩（160）从棘爪（151）抽离，阻止卷带筒（120）转动。该安全带限力器能够实现强制停止安全带的抽出的功能。还涉及一种汽车。

Description

安全带限力器和汽车 技术领域
本申请主要涉及安全带技术领域，具体地涉及一种安全带限力器和汽车。
背景技术
当车辆发生碰撞时，安全带限力器在保护成员安全方面具有重要的作用。在碰撞时，随着乘员向前移动，安全带抽出的长度逐渐增加，安全带限力器对安全带施加的力也会随之增加，从而使得安全带施加给乘员的约束力随之上升。为防止安全带对成员施加的约束力过大引起二次伤害，当约束力达到限力值时，安全带限力器内部的限力杆扭转变形，织带可继续拉出，乘员继续向前移动。
针对乘员的移动量，根据法规GB16166-2013的要求，乘员胸部移动量要在100mm～300mm之间。为了满足法规要求，应限制乘员胸部的移动量。
所以，如何保证乘员胸部的移动量满足要求是亟待解决的问题。
发明内容
本申请要解决的技术问题是提供一种安全带限力器和汽车，该安全带限力器可保证乘员胸部的移动量满足要求。
本申请为解决上述技术问题而采用的技术方案是一种安全带限力器，包括：支架，具有通孔，所述通孔的内周面具有棘轮；卷带筒，所述卷带筒穿过所述通孔且可转动地设于所述支架上，所述卷带筒具有停止爪容纳部；停止螺栓，与所述卷带筒在所述卷带筒的轴向传动连接；停止螺母，与所述卷带筒传动连接，且所述停止螺母的内周面与所述停止螺栓之间螺纹连接；停止爪，设于所述停止爪容纳部内，所述停止爪具有朝向所述棘轮的棘爪以及设于所述停止爪容纳部与所述棘爪之间的弹性部件，所述弹性部件常态地向所述棘爪施加朝向所述棘轮的力；停止闩，沿轴向穿设于所述卷带筒与所述停止螺母之间，且压抵所述棘爪以阻止所述棘爪与所述棘轮啮合；以及其中当所述停止螺栓锁止时，所述卷带筒带动所述停止螺母同步 转动预设圈数后，所述停止螺母带动所述停止闩沿所述停止螺栓向远离所述棘爪的方向移动以将所述停止闩从所述棘爪抽离，使得所述棘爪与所述棘轮啮合，阻止所述卷带筒转动。
在本申请一实施例中，所述停止螺母具有位于其外周面且沿径向突出的若干个凸起。
在本申请一实施例中，所述停止螺母具有沿轴向延伸的连接孔，所述连接孔设置于任一所述凸起上，其中，所述停止闩的一端设置于所述连接孔内。
在本申请一实施例中，所述卷带筒具有停止螺母容纳孔，所述停止螺母容纳孔具有位于其内周面且沿径向向外凹陷的若干个凹槽，其中，所述若干个凸起与所述若干个凹槽相键合以使所述停止螺母与所述卷带筒传动连接。
在本申请一实施例中，所述卷带筒具有沿其轴向延伸的通孔，所述停止闩的一端穿过所述通孔压抵所述棘爪以阻止所述棘爪与所述棘轮啮合。
在本申请一实施例中，所述停止爪具有支撑部，所述支撑部与所述棘爪相对设置，其中，当所述棘爪与所述棘轮啮合时，所述支撑部位于所述停止爪容纳部内。
在本申请一实施例中，还包括限力杆，所述限力杆的一端与所述卷带筒传动连接，另一端与所述停止螺栓传动连接。
在本申请一实施例中，所述卷带筒具有沿轴向延伸的限力杆容纳孔，其中，所述限力杆的一端穿过所述限力杆容纳孔与所述卷带筒传动连接。
在本申请一实施例中，所述卷带筒的外周面具有若各个凹槽。
本申请为解决上述技术问题还提出一种汽车，该汽车包括如前文所述的安全带限力器。
本申请的安全带限力器可以在发生碰撞时，当卷带筒转动预设圈数后，将停止闩抽离停止爪，从而使得停止爪与支架上的棘轮相啮合，进而实现强制停止安全带的抽出的功能。
附图概述
为让本申请的上述目的、特征和优点能更明显易懂，以下结合附图对本申请的具体实施方式作详细说明，其中：
图1是本申请一实施例的一种安全带限力器的立体示意图；
图2是本申请一实施例的一种安全带限力器的爆炸图；
图3是本申请一实施例的一种安全带限力器的剖面示意图；
图4是本申请一实施例的停止螺母的主视示意图；
图5是本申请一实施例的一种安全带限力器的剖面示意图。
本发明的较佳实施方式
为让本申请的上述目的、特征和优点能更明显易懂，以下结合附图对本申请的具体实施方式作详细说明。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是本申请还可以采用其它不同于在此描述的其它方式来实施，因此本申请不受下面公开的具体实施例的限制。
如本申请和权利要求书中所示，除非上下文明确提示例外情形，“一”、“一个”、“一种”和/或“该”等词并非特指单数，也可包括复数。一般说来，术语“包括”与“包含”仅提示包括已明确标识的步骤和元素，而这些步骤和元素不构成一个排它性的罗列，方法或者设备也可能包含其他的步骤或元素。
此外，需要说明的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请保护范围的限制。此外，尽管本申请中所使用的术语是从公知公用的术语中选择的，但是本申请说明书中所提及的一些术语可能是申请人按他或她的判断来选择的，其详细含义在本文的描述的相关部分中说明。此外，要求不仅仅通过所使用的实际术语，而是还要通过每个术语所蕴含的意义来理解本申请。
在发生碰撞时，本申请的安全带限力器能够在安全带抽出预设距离后，强制停止安全带的抽出，从而保证乘员胸部的移动量满足要求。
接下来通过具体的实施例对本申请的安全带限力器进行说明。
图1所示是本申请一实施例的限力器的立体示意图，图2是本申请一实施例的安全带限力器的爆炸图。如图1和图2所示，安全带限力器100包括支架110、卷带筒120、停止螺栓130、停止螺母140、停止爪150、停止闩160和限力杆170。其中，结合图1和图2所示，限力杆170的一端与卷带筒120连接，另一 端与停止螺栓130连接，停止螺母140的内周面与停止螺栓130的外周面螺纹连接，停止爪150设置于卷带筒120的停止爪容纳部内，停止闩160沿轴向穿设于卷带筒120与停止螺母140之间，且压抵停止爪150的棘爪以阻止棘爪与支架110上的棘轮啮合。
在车辆碰撞前，卷带筒120、停止螺栓130和停止螺母140同步转动，限力杆170两端分别与卷带筒120和停止螺栓130连接，其也会被卷带筒120和停止螺栓130驱使着围绕自身的轴线转动，停止闩170也会随着卷带筒120和停止螺母140一起转动。当发生碰撞时，停止螺栓130被琐止不动，卷带筒120、停止螺母140和限力杆170转动，停止闩160随着卷带筒120和停止螺母140转动。当停止螺母140转动时，停止螺母140同时沿卷带筒120的轴向朝向停止螺栓130移动，并带动与之连接的停止闩160沿卷带筒120的轴向朝向停止螺栓130移动，当卷带筒120转动预设圈数后，停止闩160从停止爪150抽离，从而使得停止爪150的棘爪与架110上棘轮啮合，阻止卷带筒120继续转动。
具体的，图3是本申请一实施例的安全带限力器的剖面示意图，该剖视图的视角为图1中的左侧视角。结合图2和图3所示，支架110具有第一通孔111，如图3所示，第一通孔111的内周面具有棘轮111a。此外，参考图2所示，支架110还具有第二通孔112。结合图1所示，卷带筒120穿设于支架110的第一通孔111和第二通孔112内。
结合图1和图2所示，卷带筒120穿过支架的第一通孔111和第二通孔112内可转动地设于支架110上。安全带(图未示)可缠绕在卷带筒120的外表面。当抽拉安全带时，安全带带动卷带筒120旋转。此外，如图2所示，卷带筒120具有停止爪容纳部121。参考图3所示，停止爪容纳部121可用于容纳停止爪150。在图3中，停止爪容纳部121具有台阶121a，停止爪150具有与之匹配的台阶152。当停止爪150放置于停止爪容纳部121时，两者的台阶相匹配，如此可保持停止爪150的稳定性。可以理解，本申请中的停止容纳部的形状以及其与停止爪之间的配合方式不限于上述实施例。
在一实施例中，如图2所示，卷带筒120的外周面具有若各个凹槽122。通过在卷带筒120上设置凹槽122可减少卷带筒120的用材，从而降低安全带限力器的成本和重量。
参考图2所示，停止螺栓130与卷带筒120在卷带筒120的轴向传动连接。具体的，限力杆170的第一端171和第二端172均具有花键，第一端171和第二端172分别与停止螺栓130和卷带筒120传动连接。在一实施例中，停止螺栓130的孔131的底部设置有与第一端171的花键相匹配的凹槽，限力杆170与停止螺栓130连接后，第一端171的花键与孔131内的凹槽相匹配，如此可实现限力杆170和停止螺栓130之间的传动连接。此外，在该实施例中，卷带筒120具有沿轴向延伸的限力杆容纳孔(图未示)，该限力杆容纳孔的底部具有与第二端172的花键相匹配的凹槽，限力杆170与卷带筒120连接后，第二端172的花键与限力杆容纳孔底部的凹槽相匹配，如此可实现限力杆170和卷带筒120之间的传动连接。
限力杆170的第一端171和第二端172分别与停止螺栓130和卷带筒120传动连接后，在碰撞前，当抽动安全带时，卷带筒120通过限力杆170带动停止螺栓130一起转动。在碰撞时，停止螺栓130被琐止，此时，虽然当安全带被抽出时卷带筒120继续转动，卷带筒120可通过限力杆170继续向停止螺栓130施加扭力，但由于停止螺栓130被琐止，停止螺栓130无法转动。
继续参考图2所示，停止螺母140与卷带筒120传动连接，且停止螺母140的内周面141与停止螺栓130的外周面132之间螺纹连接。如此，在停止螺栓130被琐止后，当卷带筒120带动停止螺母140转动时，停止螺母140转动时，同时沿着卷带筒120的轴向向停止螺栓130移动。
具体的，图4是本申请一实施例的停止螺母的主视示意图。参考图4所示，停止螺母140具有位于其外周面142且沿径向突出的若干个凸起143。与之对应，卷带筒120具有停止螺母容纳孔(图未示)，停止螺母容纳孔具有位于其内周面且沿径向向外凹陷的若干个凹槽。当将停止螺母140安放于停止螺母容纳孔时，停止螺母140的若干个凸起143与停止螺母容纳孔内的凹槽相键合，如此，卷带筒120转动时，停止螺母140随之转动。图4中的凸起143的数量和形状仅是示例性的，可以根据需求改变图4中的凸起143的数量、形状以及在外周面的具体位置。
此外，如图4所示，停止螺母140具有沿轴向延伸的连接孔144，连接孔设置于任一凸起143上，停止闩的一端可与连接孔144连接。
回到图2所示，停止闩160沿轴向穿设于卷带筒120与停止螺母140之间。接下来通过实施例对停止闩与卷带筒和停止螺母之间的连接方式进行详细的说明。
首先，图5所示是本申请一实施例的安全带限力器的剖面示意图，参考图5所示。停止闩160可通过将其的第一端161设置在停止螺母140的连接孔内的方式与停止螺母140连接。需要说明的是，第一端161与停止螺母140的连接方式能够实现停止螺母140拖动停止闩160沿轴向向停止螺栓130移动。
接着，参考图5所示，卷带筒120具有沿其轴向延伸的通孔123。停止闩160穿设于通孔123内。当卷带筒120转动时，停止闩160随之转动。
如此，在停止螺栓被琐止时，卷带筒可带动停止螺母转动，进而停止螺母带动停止闩沿轴向朝向停止螺栓移动。
接下来通过实施例对本申请停止爪的结构和作用进行介绍。
参考图2所示，停止爪150设于停止爪容纳部121内，停止爪150具有朝向棘爪151。参考图3所示，当停止爪150设置于停止爪容纳部121时，棘爪151朝向棘轮111a，在停止爪容纳部与棘爪151之间设置有的弹性部件(图未示)，弹性部件常态地向棘爪151施加朝向棘轮111a的力。在一实施例中，参考图3所示，停止爪150具有与棘爪151相对设置的支撑部153。棘爪151能够与棘轮111a相啮合。当棘爪151与棘轮111a啮合时，支撑部153位于停止爪容纳部内，从而形成“停止爪150中棘爪151所在的一端与支架110的棘轮111a相啮合，支撑部153所在的一端位于卷带筒120内”的情形，由于支架110是固定不定的，因此，停止爪150能够阻止卷带筒120的转动，从而限制安全带的抽出。
结合图3和图5所示，在发生碰撞前，停止闩160的第二端162穿过卷带筒120的通孔123压抵棘爪151以阻止棘爪151在弹力的作用下与棘轮111a啮合。当发生碰撞后，停止螺栓130被锁止时，乘员因惯性向前移动，并将安全带抽出，进而带动卷带筒120转动，卷带筒120在带动停止螺母140同步转动预设圈数后，停止螺母140带动停止闩160从棘爪151抽离，使得棘爪151与棘轮111a啮合，阻止卷带筒120转动。本申请不对预设圈数做限制，例如，可以根据法规规定的安全带抽出距离来计算预设圈数。
当发生碰撞时，在卷带筒转动预设圈数后，上述实施例中的安全带限力器通过将停止闩抽离停止爪，从而使得停止爪与支架上的棘轮相啮合，进而实现强制停止安全带的抽出的功能。
本申请另一方面还提出一种汽车，该汽车包括如前文所述的安全带限力器。当发生碰撞时，在卷带筒转动预设圈数后，上述汽车的安全带限力器通过将停止闩抽离停止爪，从而使得停止爪与支架上的棘轮相啮合，进而实现强制停止安全带的抽出的功能。
上文已对基本概念做了描述，显然，对于本领域技术人员来说，上述申请披露仅仅作为示例，而并不构成对本申请的限定。虽然此处并没有明确说明，本领域技术人员可能会对本申请进行各种修改、改进和修正。该类修改、改进和修正在本申请中被建议，所以该类修改、改进、修正仍属于本申请示范实施例的精神和范围。
同时，本申请使用了特定词语来描述本申请的实施例。如“一个实施例”、“一实施例”、和/或“一些实施例”意指与本申请至少一个实施例相关的某一特征、结构或特点。因此，应强调并注意的是，本说明书中在不同位置两次或多次提及的“一实施例”或“一个实施例”或“一替代性实施例”并不一定是指同一实施例。此外，本申请的一个或多个实施例中的某些特征、结构或特点可以进行适当的组合。
一些实施例中使用了描述成分、属性数量的数字，应当理解的是，此类用于实施例描述的数字，在一些示例中使用了修饰词“大约”、“近似”或“大体上”来修饰。除非另外说明，“大约”、“近似”或“大体上”表明所述数字允许有±20％的变化。相应地，在一些实施例中，说明书和权利要求中使用的数值参数均为近似值，该近似值根据个别实施例所需特点可以发生改变。在一些实施例中，数值参数应考虑规定的有效数位并采用一般位数保留的方法。尽管本申请一些实施例中用于确认其范围广度的数值域和参数为近似值，在具体实施例中，此类数值的设定在可行范围内尽可能精确。

Claims (10)

  1. 一种安全带限力器，其特征在于，包括：
    支架，具有通孔，所述通孔的内周面具有棘轮；
    卷带筒，所述卷带筒穿过所述通孔且可转动地设于所述支架上，所述卷带筒具有停止爪容纳部；
    停止螺栓，与所述卷带筒在所述卷带筒的轴向传动连接；
    停止螺母，与所述卷带筒传动连接，且所述停止螺母的内周面与所述停止螺栓之间螺纹连接；
    停止爪，设于所述停止爪容纳部内，所述停止爪具有朝向所述棘轮的棘爪以及设于所述停止爪容纳部与所述棘爪之间的弹性部件，所述弹性部件常态地向所述棘爪施加朝向所述棘轮的力；
    停止闩，沿轴向穿设于所述卷带筒与所述停止螺母之间，且压抵所述棘爪以阻止所述棘爪与所述棘轮啮合；以及
    其中当所述停止螺栓锁止时，所述卷带筒带动所述停止螺母同步转动预设圈数后，所述停止螺母带动所述停止闩沿所述停止螺栓向远离所述棘爪的方向移动以将所述停止闩从所述棘爪抽离，使得所述棘爪与所述棘轮啮合，阻止所述卷带筒转动。
  2. 如权利要求1所述的限力器，其特征在于，所述停止螺母具有位于其外周面且沿径向突出的若干个凸起。
  3. 如权利要求2所述的限力器，其特征在于，所述停止螺母具有沿轴向延伸的连接孔，所述连接孔设置于任一所述凸起上，其中，所述停止闩的一端设置于所述连接孔内。
  4. 如权利要求2所述的限力器，其特征在于，所述卷带筒具有停止螺母容纳孔，所述停止螺母容纳孔具有位于其内周面且沿径向向外凹陷的若干个凹槽，其中，所述若干个凸起与所述若干个凹槽相键合以使所述停止螺母与所述卷带筒传动连接。
  5. 如权利要求1所述的限力器，其特征在于，所述卷带筒具有沿其轴向延伸的通孔，所述停止闩的一端穿过所述通孔压抵所述棘爪以阻止所述棘爪与所述棘 轮啮合。
  6. 如权利要求1所述的限力器，其特征在于，所述停止爪具有支撑部，所述支撑部与所述棘爪相对设置，其中，当所述棘爪与所述棘轮啮合时，所述支撑部位于所述停止爪容纳部内。
  7. 如权利要求1所述的限力器，其特征在于，还包括限力杆，所述限力杆的一端与所述卷带筒传动连接，另一端与所述停止螺栓传动连接。
  8. 如权利要求7所述的限力器，其特征在于，所述卷带筒具有沿轴向延伸的限力杆容纳孔，其中，所述限力杆的一端穿过所述限力杆容纳孔与所述卷带筒传动连接。
  9. 如权利要求1所述的限力器，其特征在于，所述卷带筒的外周面具有若各个凹槽。
  10. 一种汽车，其特征在于，包括如权利要求1至9任一项所述的安全带限力器。
PCT/CN2023/133248 2022-11-24 2023-11-22 安全带限力器和汽车 WO2024109805A1 (zh)

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