Linear force limiter
By designing a linear force limiter, using the combination of brackets, push rods, elastic parts and limiting parts, the problem of being unable to limit linear forces in the prior art is solved, and the safety protection of equipment and personnel is achieved.
Patent Information
- Application Number
- CN202422525358.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-10-17
AI Technical Summary
Existing torque limiters can only limit rotational torque and cannot be applied to force limits in the linear direction, resulting in damage to equipment and personnel in abnormal operation.
A linear force limiter is designed, including a bracket, push rod, a first elastic member and a limiter. By controlling the clamping and disengagement of the limiter and the limiter in different states, the force transmission or decoupling in the linear direction is realized to avoid damage in the case of overload.
Effectively limit force transmission in the linear direction, protect equipment and personnel safety, and improve equipment safety performance.
Smart Images
Figure CN223062973U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of mechanical transmission, and in particular to a linear force limiter. Background Art
[0002] Abnormal operation during the operation of the equipment will cause damage to the equipment and personnel. In order to limit the output of force, there is currently a torque limiter, but this device can only limit the rotational torque, and then limit the torque in the linear direction, which is not applicable to structures that cannot be converted into torque. Utility Model Content
[0003] Based on this, a linear force limiter is provided to limit the torque in the linear direction to avoid damage to equipment and personnel.
[0004] To this end, an embodiment of the present application provides a linear force limiter, including: a bracket, which is arranged in a cylindrical shape; a push rod, one end of which extends into the inner cavity of the bracket and is slidably connected to the bracket, and the push rod is provided with a limiting portion; a first elastic member, one end of which abuts the bracket and the other end faces the push rod; and a limiting member, which is connected to the end of the first elastic member facing the push rod, and the limiting member is used to engage with the limiting portion; in a first state, the first elastic member is in a return state, the limiting member is engaged with the limiting portion, and force transmission is performed between the push rod and the bracket; in a second state, the first elastic member is in a compression state, the limiting member is disengaged from the limiting portion, and no force transmission is performed between the push rod and the bracket.
[0005] In one embodiment, a mounting tube is connected to the peripheral side of the bracket, an adjusting member is threadedly connected to one end of the mounting tube away from the bracket, and one end of the first elastic member away from the push rod abuts against the adjusting member.
[0006] In one of the embodiments, the push rod is further provided with a slide groove adapted to the limiting member, the slide groove extends along the length direction of the push rod, and the limiting portion is located at one end of the slide groove.
[0007] In one embodiment, a plurality of the limiting portions and the sliding grooves are provided, and the plurality of the limiting portions and the sliding grooves are arranged at intervals along the circumference and axial direction of the push rod; a plurality of the limiting members and the first elastic members are provided, and the plurality of the limiting members and the first elastic members are arranged at intervals along the circumference and axial direction of the push rod.
[0008] In one embodiment, the plurality of slide grooves are divided into two groups, and the extension directions of the two groups of slide grooves are opposite.
[0009] In one of the embodiments, one end of the bracket facing away from the push rod is connected to a limiting support, and the limiting support is provided with a clearance groove for the push rod to extend into.
[0010] In one of the embodiments, a first boss protrudes from the middle circumference of the push rod, and the limiting portion and the sliding groove are arranged on the first boss.
[0011] In one embodiment, a second elastic member is further included, one end of the second elastic member abuts against the limiting support, and the other end of the second elastic member abuts against the first boss.
[0012] In one of the embodiments, a third elastic member is further included. A second boss is provided on the inner wall of one end of the bracket away from the limiting support. Two ends of the third elastic member are respectively in contact with the first boss and the second boss.
[0013] In one embodiment, the surface of the limiting portion is arranged in an arc shape, and / or the surface of the limiting member facing the push rod is arranged in an arc shape.
[0014] According to the linear force limiter provided by the embodiment of the present application, it includes a bracket, a push rod, a first elastic member and a limiter; the bracket is arranged in a cylindrical shape; one end of the push rod extends into the inner cavity of the bracket and is slidably connected with the bracket, and the push rod is provided with a limiter; one end of the first elastic member abuts against the bracket, and the other end faces the push rod; the limiter is connected to one end of the first elastic member facing the push rod, and the limiter is used to engage with the limiter; in the first state, the first elastic member is in a return state, the limiter is engaged with the limiter, and force transmission is performed between the push rod and the bracket; in the second state, the first elastic member is in a compressed state, the limiter is disengaged from the limiter, and no force transmission is performed between the push rod and the bracket. When the thrust or tension of the push rod is greater than the limiter, or the tension or pressure of the bracket is greater than the limiter, the limiter is disengaged from the limiter, and no force transmission is performed between the push rod and the bracket, thereby avoiding damage to the equipment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A schematic structural diagram of a linear force limiter provided in an embodiment of the present application is shown;
[0016] Figure 2 A schematic diagram showing a push rod, a first elastic member, and a limiting member provided in an embodiment of the present application;
[0017] Figure 3 A cross-sectional view of a linear force limiter provided in an embodiment of the present application is shown.
[0018] Description of reference numerals:
[0019] 1. Bracket; 11. Restricting support; 111. Relief groove; 12. Mounting cylinder; 13. Second boss; 2. Push rod; 21. Restricting part; 22. Chute; 23. First boss; 3. First elastic member; 4. Positioning member; 5. Adjusting member; 6. Second elastic member; 7. Third elastic member. Detailed implementation manners
[0020] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0021] It should be noted that the drawings provided in this embodiment only illustrate the basic concept of the present utility model schematically. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.
[0022] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the objectives that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.
[0023] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0024] During the operation of the equipment, there are abnormal operating conditions, which will cause damage to the equipment and personnel. In order to limit the output of force, there is currently a torque limiter, but this device can only limit the rotational torque, and thus limit the torque in the linear direction, and is not applicable to structures that cannot be converted into torque.
[0025] To solve the above problems, refer to Figures 1 - 3 , Figure 1 which shows a schematic structural diagram of a linear force limiter provided by an embodiment of the present application.Figure 2 Schematic diagram showing a push rod, a first elastic member, and a limiting member provided by an embodiment of the present application Figure 3 Cross-sectional view showing a linear force limiter provided by an embodiment of the present application
[0026] The present application provides a linear force limiter, which includes a bracket 1, a push rod 2, a first elastic member 3, and a limiting member 4. The bracket 1 is arranged in a cylindrical shape; one end of the push rod 2 extends into the inner cavity of the bracket 1 and is slidably connected to the bracket 1. The push rod 2 is provided with a limiting portion 21; one end of the first elastic member 3 abuts against the bracket 1, and the other end faces the push rod 2; the limiting member 4 is connected to the end of the first elastic member 3 facing the push rod 2, and the limiting member 4 is used to engage with the limiting portion 21; in the first state, the first elastic member 3 is in a return state, the limiting member 4 is engaged with the limiting portion 21, and force transmission occurs between the push rod 2 and the bracket 1; in the second state, the first elastic member 3 is in a compressed state, the limiting member 4 is disengaged from the limiting portion 21, and no force transmission occurs between the push rod 2 and the bracket 1.
[0027] It should be understood that the linear force limiter includes a bracket 1, and the bracket 1 is arranged in a cylindrical shape. The bracket 1 can be in a cylindrical shape, a square cylindrical shape, a triangular cylindrical shape, or any other cylindrical shape, and the present application does not make any restrictions. The push rod 2 is in a long strip shape and can be in a cuboid shape, a cylindrical shape, a triangular prism shape, etc. in a long strip shape, and the present application does not make any restrictions. Moreover, the bracket 1 and the push rod 2 can be conformally arranged or non-conformally arranged, and the present application does not make any restrictions. In one example, the bracket 1 is in a cylindrical shape and the push rod 2 is in a cylindrical shape. The following will be explained with the bracket 1 being in a cylindrical shape and the push rod 2 being in a cylindrical shape.
[0028] The bracket 1 can be used to connect to other components of the machine. One end of the push rod 2 extends into the inner cavity of the bracket 1, and the other end of the push rod 2 is located outside the inner cavity of the bracket 1 for easy operation by the operator. The outer wall of the push rod 2 is provided with a limiting portion 21, and the limiting portion 21 can be a groove or a protrusion. It also includes a first elastic member 3 and a limiting member 4. One end of the first elastic member 3 abuts against the bracket 1, and the other end is connected to the limiting member 4. The first elastic member 3 can be an elastic substance such as a spring or a disc spring, and the present application does not make any restrictions; the telescopic direction of the first elastic member 3 is perpendicular to the length direction of the push rod 2. The limiting member 4 is engaged with the limiting portion 21. When the limiting portion 21 is a groove, the limiting member 4 is a protrusion, and when the limiting portion 21 is a protrusion, the limiting member 4 is provided with a groove.
[0029] In the first state, the first elastic member 3 is in a return state, the limiting member 4 is engaged with the limiting portion 21, and force transmission occurs between the push rod 2 and the bracket 1. That is, the operator can apply a thrust or a pull force through the push rod 2, causing the push rod 2 to have a tendency to move. Since the limiting member 4 is engaged with the limiting portion 21, that is, the movement of the push rod 2 drives the movement of the bracket 1; or, a force is applied to the bracket 1, causing the bracket 1 to have a tendency to move, and the movement of the bracket 1 drives the movement of the push rod 2. Therefore, force transmission occurs between the push rod 2 and the bracket 1.
[0030] In the second state, the first elastic member 3 is in a compressed state, and the limiting member 4 is disengaged from the limiting portion 21. That is, the operator can apply a pushing force or a pulling force through the push rod 2, so that the push rod 2 has a tendency to move. Since the limiting member 4 is disengaged from the limiting portion 21, that is, the push rod 2 slides relative to the bracket 1; or, a force is applied to the bracket 1, so that the bracket 1 has a tendency to move, and the bracket 1 moves relative to the push rod 2. Therefore, no force transmission occurs between the push rod 2 and the bracket 1. At this time, the push rod 2 and the bracket 1 are decoupled to protect the safety of the equipment and personnel and improve the safety performance of the equipment.
[0031] Referring to Figure 2 and Figure 3 , in some alternative embodiments, the surface of the limiting portion 21 is arc-shaped to facilitate the disengagement of the limiting member 4 from the limiting portion 21.
[0032] In some alternative embodiments, the surface of the limiting member 4 facing the push rod 2 is arc-shaped to facilitate the disengagement of the limiting member 4 from the limiting portion 21. In one example, the limiting member 4 is spherical.
[0033] In one example, the surface of the limiting portion 21 is arc-shaped and the limiting member 4 is spherical.
[0034] In some alternative embodiments, an installation cylinder 12 is connected to the periphery of the bracket 1. One end of the installation cylinder 12 away from the bracket 1 is threadedly connected to an adjusting member 5, and one end of the first elastic member 3 facing away from the push rod 2 abuts against the adjusting member 5. The material of the installation cylinder 12 is the same as that of the bracket 1. The installation cylinder 12 is arranged on the periphery of the bracket 1 and integrally formed with the bracket 1. The present application does not limit the shape of the installation cylinder 12. The installation cylinder 12 can be cylindrical, square cylindrical or other cylindrical shapes. In one example, the installation cylinder 12 is cylindrical. The inner cavity of the installation cylinder 12 is communicated with the inner cavity of the bracket 1, and the length direction of the installation cylinder 12 is perpendicular to the length direction of the bracket 1 to ensure that the telescopic direction of the first elastic member 3 is perpendicular to the length direction of the bracket 1. The first elastic member 3 is located in the installation cylinder 12, so as to ensure that the telescopic of the first elastic member 3 will not be skewed, and further improve the accuracy of the telescopic of the first elastic member 3.
[0035] One end of the installation cylinder 12 away from the push rod 2 is threadedly connected to an adjusting member 5. The adjusting member 5 is a machine screw, and one end of the first elastic member 3 facing away from the push rod 2 abuts against the adjusting member 5. The operator can adjust the position of the adjusting member 5 in the installation cylinder 12, and then adjust the elastic force of the first elastic member 3, so as to adjust the driving force for the limiting member 4 to disengage from the limiting portion 21, thereby facilitating the operator to adjust the magnitude of the limiting force.
[0036] In some alternative embodiments, the push rod 2 is further provided with a sliding groove 22 adapted to the limiting member 4. The sliding groove 22 extends along the length direction of the push rod 2, and the limiting portion 21 is located at one end of the sliding groove 22. The outer wall of the push rod 2 is formed with the sliding groove 22, and the inner wall of the sliding groove 22 is arc-shaped to facilitate the sliding of the limiting member 4 in the sliding groove 22.
[0037] In some alternative embodiments, there are multiple limiting portions 21 and sliding grooves 22, and the multiple limiting portions 21 and sliding grooves 22 are arranged at intervals along the circumferential and axial directions of the push rod 2; there are multiple limiting members 4 and first elastic members 3, and the multiple limiting members 4 and first elastic members 3 are arranged at intervals along the circumferential and axial directions of the push rod 2. There are multiple limiting portions 21, sliding grooves 22, first elastic members 3, limiting members 4, mounting cylinders 12 and adjusting members 5, and the multiple limiting portions 21, sliding grooves 22, first elastic members 3, limiting members 4, mounting cylinders 12 and adjusting members 5 correspond to each other one by one, so as to facilitate the force transmission between the push rod 2 and the bracket 1 and improve the transmission effect.
[0038] Refer to Figure 2 , in some alternative embodiments, the multiple sliding grooves 22 are divided into two groups, and the extending directions of the two groups of sliding grooves 22 are opposite. In one example, the extending direction of the first group of sliding grooves 22 faces the first direction, and the extending direction of the second group of sliding grooves 22 faces the second direction, and the first direction is opposite to the second direction. In one example, the first direction is upward, the second direction is downward, and in one example, the first direction is to the left and the second direction is to the right. The present application does not limit the orientation of the first direction and the second direction.
[0039] When the push rod 2 moves towards the first direction, the limiting member 4 located in the second group of sliding grooves 22 is engaged with the limiting portion 21, thereby realizing the force conduction between the push rod 2 and the bracket 1. At this time, there is no force conduction between the limiting member 4 located in the first group of sliding grooves 22 and the limiting portion 21. When the thrust of the push rod 2 is greater than the set limiting force, the limiting member 4 is disengaged from the limiting portion 21 located in the second group of sliding grooves 22. At this time, the limiting member 4 located in the first group of sliding grooves 22 slides in the first group of sliding grooves 22, making the sliding between the push rod 2 and the bracket 1 smoother.
[0040] At this time, the adjusting member 5 corresponding to the second group of sliding grooves 22 can be used to adjust the limiting force of the movement of the push rod 2 towards the first direction.
[0041] When the push rod 2 moves towards the second direction, the limiting member 4 in the first set of sliding grooves 22 is engaged with the limiting portion 21, thereby realizing the force transmission between the push rod 2 and the bracket 1. At this time, there is no force transmission between the limiting member 4 in the second set of sliding grooves 22 and the limiting portion 21. When the thrust of the push rod 2 is greater than the set limiting force, the limiting member 4 is disengaged from the limiting portion 21 in the first set of sliding grooves 22. At this time, the limiting member 4 in the second set of sliding grooves 22 slides in the second set of sliding grooves 22, making the sliding between the push rod 2 and the bracket 1 smoother.
[0042] At this time, the adjusting member 5 corresponding to the first sliding groove 22 can be used to adjust the limiting force of the push rod 2 moving towards the second direction.
[0043] In some alternative embodiments, a limiting support 11 is connected to one end of the bracket 1 facing away from the push rod 2. The limiting support 11 is provided with a relief groove 111 for the push rod 2 to extend into. One end of the limiting support 11 extends into the inner cavity of one end of the bracket 1 facing the first direction and is connected to the bracket 1. The connection method can be threaded connection, snap connection or welding, etc., and the present application does not make a limitation. The limiting support 11 can be connected to other parts of the device to facilitate force transmission. The end of the limiting support 11 extending into the bracket 1 is provided with a relief groove 111 to facilitate the extension of the push rod 2, so as not to affect the movement of the push rod 2.
[0044] In some alternative embodiments, a first boss 23 protrudes from the circumferential side of the middle part of the push rod 2. The limiting portion 21 and the sliding groove 22 are arranged at the first boss 23. The first boss 23 is made of the same material as the push rod 2, that is, the first boss 23 is integrally formed with the push rod 2. The limiting portion 21 and the sliding groove 22 are both arranged at the first boss 23, so as not to affect the strength of the push rod 2.
[0045] In some alternative embodiments, a second elastic member 6 is further included. One end of the second elastic member 6 abuts against the limiting support 11, and the other end of the second elastic member 6 abuts against the first boss 23. The second elastic member 6 is located in the inner cavity of the bracket 1. The second elastic member 6 can be an elastic member such as a spring or a disc spring. One end of the second elastic member 6 abuts against or is connected to the limiting support 11, and the other end of the second elastic member 6 abuts against or is connected to the first boss 23. When the thrust received by the push rod 2 causes the push rod 2 to move towards the first direction, the second elastic member 6 is in a compressed state. After the thrust on the push rod 2 is removed, the second elastic member 6 returns to its original position, thereby driving the push rod 2 to return to its original position, without the need for manual operation, further improving the convenience of the operator.
[0046] In some alternative embodiments, a third elastic member 7 is further included. A second boss 13 is provided on the inner wall of the end of the bracket 1 away from the limiting support 11. The two ends of the third elastic member 7 are respectively in contact with the first boss and the second boss. The material of the second boss 13 is the same as that of the bracket 1, and the second boss 13 is integrally formed with the bracket 1. The third elastic member 7 can be an elastic member such as a spring or a disc spring. One end of the third elastic member 7 is in contact with or connected to the first boss 23, and the other end of the second elastic member 6 is in contact with or connected to the second boss 13. When the thrust received by the push rod 2 causes the push rod 2 to move in the second direction, the third elastic member 7 is in a compressed state. After the thrust on the push rod 2 is removed, the third elastic member 7 returns to its original position, thereby driving the push rod 2 to return to its original position, eliminating the need for manual operation and further improving the convenience for the operator.
[0047] Referring to Figures 1 - 3 , the technical solution provided in this embodiment will be described below in conjunction with specific application scenarios.
[0048] The operator adjusts the adjusting member 5 corresponding to the second set of sliding grooves 22, thereby adjusting the limiting force of the movement of the push rod 2 in the first direction. The operator adjusts the adjusting member 5 corresponding to the first set of sliding grooves 22, thereby adjusting the limiting force of the movement of the push rod 2 in the second direction.
[0049] When a thrust is applied to the push rod 2 or a pulling force is applied to the bracket 1, the limiting member 4 in the second set of sliding grooves 22 is engaged with the limiting portion 21, thereby realizing the force transmission between the push rod 2 and the bracket 1. The push rod 2 drives the bracket 1 to move in the first direction, or the bracket 1 drives the push rod 2 to move in the first direction. At this time, there is no force transmission between the limiting member 4 in the first set of sliding grooves 22 and the limiting portion 21.
[0050] When the thrust of the push rod 2 is greater than the set limiting force or the pulling force of the bracket 1 is greater than the set limiting force, the limiting member 4 is disengaged from the limiting portion 21 in the second set of sliding grooves 22, and the limiting member 4 in the first set of sliding grooves 22 slides in the first set of sliding grooves 22, making the sliding between the push rod 2 and the bracket 1 smoother. The decoupling of the push rod 2 and the bracket 1 protects the safety of the equipment and personnel and improves the safety performance of the equipment.
[0051] When a pulling force is applied to the push rod 2 or a pressure is applied to the bracket 1, the limiting member 4 in the first set of sliding grooves 22 is engaged with the limiting portion 21, thereby realizing the force transmission between the push rod 2 and the bracket 1. The push rod 2 drives the bracket 1 to move in the second direction, or the bracket 1 drives the push rod 2 to move in the second direction. At this time, there is no force transmission between the limiting member 4 in the second set of sliding grooves 22 and the limiting portion 21.
[0052] When the pulling force of the push rod 2 is greater than the set limit force or the pulling force of the bracket 1 is greater than the set limit force, the limiting member 4 is disengaged from the limiting portion 21 located in the first set of sliding grooves 22, and the limiting member 4 located in the second set of sliding grooves 22 slides in the second set of sliding grooves 22, making the sliding between the push rod 2 and the bracket 1 smoother. The decoupling of the push rod 2 and the bracket 1 protects the safety of the equipment and personnel and improves the safety performance of the equipment.
[0053] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0054] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
Claims
1. A linear force limiter, characterized in that, Comprising: A bracket (1), arranged in a cylindrical shape; A push rod (2), one end of which extends into the inner cavity of the bracket (1) and is slidably connected to the bracket (1), and the push rod (2) is provided with a limiting portion (21); A first elastic member (3), one end of which abuts against the bracket (1), and the other end faces the push rod (2); And A limiting member (4), connected to the end of the first elastic member (3) facing the push rod (2), and the limiting member (4) is used for clamping with the limiting portion (21); In the first state, the first elastic member (3) is in a return state, the limiting member (4) is clamped with the limiting portion (21), and force transmission occurs between the push rod (2) and the bracket (1); In the second state, the first elastic member (3) is in a compressed state, the limiting member (4) is disengaged from the limiting portion (21), and no force transmission occurs between the push rod (2) and the bracket (1).
2. The linear force limiter according to claim 1, wherein An installation cylinder (12) is connected to the circumferential side of the bracket (1), and an adjusting member (5) is threadedly connected to the end of the installation cylinder (12) away from the bracket (1), and the end of the first elastic member (3) facing away from the push rod (2) abuts against the adjusting member (5).
3. The linear force limiter according to claim 1, characterized in that, The push rod (2) is further provided with a sliding groove (22) adapted to the limiting member (4), the sliding groove (22) extends along the length direction of the push rod (2), and the limiting portion (21) is located at one end of the sliding groove (22).
4. The linear force limiter according to claim 3, characterized in that, A plurality of the limiting portions (21) and the sliding grooves (22) are provided, and the plurality of limiting portions (21) and the sliding grooves (22) are arranged at intervals along the circumferential and axial directions of the push rod (2); a plurality of the limiting members (4) and the first elastic members (3) are provided, and the plurality of limiting members (4) and the first elastic members (3) are arranged at intervals along the circumferential and axial directions of the push rod (2).
5. The linear force limiter according to claim 4, wherein, The plurality of sliding grooves (22) are divided into two groups, and the extending directions of the two groups of sliding grooves (22) are arranged in opposite directions.
6. The linear force limiter according to claim 3, wherein, A limiting support (11) is connected to the end of the bracket (1) facing away from the push rod (2), and the limiting support (11) is provided with a relief groove (111) for the push rod (2) to extend into.
7. The linear force limiter according to claim 6, characterized in that, A first boss (23) protrudes from the circumferential side of the middle part of the push rod (2), and the limiting portion (21) and the sliding groove (22) are arranged at the first boss (23).
8. The linear force limiter according to claim 7, wherein, It further includes a second elastic member (6), one end of the second elastic member (6) abuts against the limiting support (11), and the other end of the second elastic member (6) abuts against the first boss (23).
9. The linear force limiter according to claim 7 or 8, characterized in that, It further includes a third elastic member (7), a second boss (13) is provided on the inner wall of the end of the bracket (1) facing away from the limiting support (11), and the two ends of the third elastic member (7) respectively abut against the first boss (23) and the second boss (13).
10. The linear force limiter according to claim 1, characterized in that, The surface of the limiting portion (21) is arranged in an arc shape, and / or the surface of the limiting member (4) facing the push rod (2) is arranged in an arc shape.