Torsion bar type elastic structure

Abstract

The torsion bar type elastic structure comprises a first torsion assembly, a second torsion assembly and a moving assembly, the second torsion assembly is provided with a mounting cavity, the first torsion assembly is arranged in the mounting cavity, one end of the first torsion assembly is fixedly connected with the end face of the mounting cavity, and the other end of the first torsion assembly extends out of the outer side of the mounting cavity; the moving assembly is connected with the second torsion assembly, can move in the axial direction of the second torsion assembly and comprises a first supporting arm and a second supporting arm which are oppositely arranged, the first supporting arm is provided with a first inclined end face which abuts against the first torsion assembly, and the second supporting arm is provided with a second inclined end face which abuts against the second torsion assembly. The second inclined end face abuts against the second torsion assembly. According to the invention, through the arrangement of the structure, the effect of a spring can be achieved, the volume is relatively small, the weight is relatively light, the device is suitable for application scenes with relatively high requirements on thrust, weight and space, and meanwhile, the device is simple in structure and convenient to mount and manufacture.

Description

Technical Field

[0001] The invention relates to the technical field of torsion bars, and in particular to a torsion bar type elastic structure. Background Art

[0002] Spring is a very commonly used elastic structure. Most common springs are made of stainless steel, copper alloy, nickel alloy and other metal materials tightly wound into a spiral shape. Metal springs are limited by the material itself, and have low specific stiffness and specific strength. It is difficult to achieve nonlinear spring thrust design, and thus it is difficult to make super-large springs.

[0003] On this basis, a composite spring was designed. The composite spring uses composite materials such as carbon fiber and glass fiber, which makes the spring itself have higher specific stiffness, specific strength, good fatigue performance and corrosion resistance. The spiral composite spring is formed by tightly winding the composite spring into a spiral shape, but the manufacturing process of this spiral composite spring is too complicated and the spiral structure is difficult to form, resulting in high manufacturing costs. The cage-type composite spring is composed of a composite spring leaf and a metal constraint frame. Although the manufacturing process is simple and the manufacturing cost is low, this spring has a complex structure, large size, and heavy weight, and is not suitable for applications with small thrust and large space size restrictions. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing spring structure is complex, large in size, heavy in weight and is not suitable for application scenarios with small thrust and large space size restrictions. Therefore, a torsion bar type elastic structure is invented. By designing the torsion component material, layup direction, thickness and inclined end face spiral angle, arbitrary linear and nonlinear spring stiffness design can be achieved, which is suitable for most spring application scenarios.

[0005] To this end, the present invention provides a torsion bar type elastic structure, comprising:

[0006] a first torsion assembly;

[0007] A second torsion assembly, wherein the second torsion assembly has an installation cavity with an opening at one end, the first torsion assembly is disposed in the installation cavity, one end of the first torsion assembly is fixedly connected to an end surface of the installation cavity, and the other end extends out of the installation cavity;

[0008] A moving assembly, the moving assembly is connected to the second torsion assembly and can move along the axial direction of the second torsion assembly, and comprises a first support arm and a second support arm arranged opposite to each other, the first support arm having a first oblique end surface, one of the first oblique end surfaces abutting against an end of the first torsion assembly away from the end where the first torsion assembly is fixedly connected to the second torsion assembly, the second support arm having a second oblique end surface, one of the second oblique end surfaces abutting against an end of the second torsion assembly away from the end where the first torsion assembly is fixedly connected to the first torsion assembly, and the widths of the first support arm and the second support arm gradually decrease from the end away from the end where the first torsion assembly is fixedly connected to the second torsion assembly to the end close to the fixed connection;

[0009] When an external force is applied to drive the moving component to move toward the end where the first torsion component and the second torsion component are fixedly connected, the first support arm and the second support arm drive the first torsion component and the second torsion component to twist, and the first torsion component and the second torsion component are twisted in opposite directions. After releasing the moving component, the first torsion component and the second torsion component twist in the opposite direction and drive the first support arm and the second support arm to move away from the end where the first torsion component and the second torsion component are fixedly connected.

[0010] Optionally, the first torsion assembly comprises:

[0011] An inner tube, arranged in the installation cavity, one end of which is fixedly connected to the end surface of the installation cavity, and the other end of which extends out of the installation cavity;

[0012] A first rotating member is arranged at one end of the inner tube extending out of the installation cavity;

[0013] The first torsion arm is arranged on the first rotating member.

[0014] Optionally, the second torsion assembly comprises:

[0015] an outer tube having the mounting cavity;

[0016] A second rotating member is disposed at one end of the outer tube close to the first rotating member and is located below the first rotating member;

[0017] The second torsion arm is arranged on the second rotating member, and a rolling bearing or a smooth material with a small friction coefficient is arranged at the end of the second torsion arm.

[0018] Optionally, the first rotating member is threadedly connected to the inner tube, and the second rotating member is threadedly connected to the outer tube.

[0019] Optionally, two first torsion arms are disposed on the first rotating member, and the two first torsion arms are coaxially arranged; two second torsion arms are disposed on the second rotating member, and the two second torsion arms are coaxially arranged.

[0020] Optionally, the first support arm has two first oblique end surfaces, one of which abuts against one of the first torsion arms, and the other of which abuts against one of the second torsion arms; the second support arm has two second oblique end surfaces, one of which abuts against another of the second torsion arms, and the other of which abuts against another of the first torsion arms.

[0021] Optionally, the first oblique end surface and the second oblique end surface are both inclined in a spiral shape.

[0022] Optionally, the first arm and the second arm are arc-shaped.

[0023] Optionally, the moving component further includes:

[0024] A sleeve is sleeved on the second torsion assembly and fixedly connected to one end of the first support arm and the second support arm. The sleeve is suitable for reciprocating movement on the second torsion assembly.

[0025] Optionally, the moving component further includes:

[0026] A support plate is connected to the other ends of the first support arm and the second support arm.

[0027] The technical solution of the present invention has the following advantages:

[0028] 1. The present invention provides a torsion bar type elastic structure, which is provided by setting the first torsion component in the installation cavity of the second torsion component, and then installing the moving component on the second torsion component, driving the moving component to move, so that the first torsion component and the second torsion component rotate to generate torque, and after releasing the moving component, the moving component returns to the initial state under the action of the torque of the first torsion component and the second torsion component. In the invention, by setting the first torsion component, the second torsion component and the moving component, it can play the role of a spring, and this spring structure is small in size and light in weight. Any stiffness, thrust, stroke linear and nonlinear spring stiffness design can be achieved by adjusting the material of the torsion component, the layer angle, the diameter, the wall thickness and the rotation angle of the support arm, and it is suitable for application scenarios with high requirements for thrust, weight and space. At the same time, it has a simple structure and is easy to install and manufacture.

[0029] 2. The present invention provides a torsion bar type elastic structure, wherein the movable component comprises a first support arm and a second support arm arranged opposite to each other, wherein the first support arm has a first inclined end face, and one of the first inclined end faces abuts against one end of the first torsion component away from the fixed connection with the second torsion component, and the second support arm has a second inclined end face, and one of the second inclined end faces abuts against one end of the second torsion component away from the fixed connection with the first torsion component, and both the first inclined end face and the second inclined end face are inclined in a spiral shape. In the present invention, by adjusting the spiral structure of the first inclined end face and the second inclined end face, an elastic structure with different thrusts and different strokes can be realized, thereby improving the scope of application of the elastic structure.

[0030] 3. The present invention provides a torsion bar elastic structure, wherein the moving assembly further comprises a sleeve, which is sleeved on the second torsion assembly and fixedly connected to one end of the first arm and the second arm, and the sleeve is suitable for reciprocating movement on the second torsion assembly. In the present invention, by providing the sleeve, the sleeve can drive the moving assembly to move more smoothly along the axial direction of the first torsion assembly, play a good guiding role, and thus make the sliding of the moving assembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the torsion assembly of the present invention;

[0034] Figure 3 It is a schematic diagram of the cross-sectional structure of the torsion assembly of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the mobile component of the present invention;

[0036] Figure 5 It is a schematic diagram of the sleeve structure of the present invention.

[0037] Description of the accompanying drawings in the embodiments:

[0038] 1. First torsion assembly; 2. Second torsion assembly; 3. Moving assembly;

[0039] 11. inner tube; 12. first rotating member; 13. first torsion arm;

[0040] 21. Outer tube; 22. Second rotating member; 23. Second torsion arm.

[0041] 31. First arm; 32. Second arm; 33. Sleeve; 34. Support plate. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] Example

[0047] like Figures 1 to 5As shown, this embodiment provides a torsion bar type elastic structure, including a first torsion component 1, a second torsion component 2 and a moving component 3, the second torsion component 2 has an installation cavity with an opening at one end, the first torsion component 1 is arranged in the installation cavity, one end of which is fixedly connected to the end surface of the installation cavity, and the other end extends out of the installation cavity; the moving component 3 is connected to the second torsion component 2 and can move along the axial direction of the second torsion component 2, and includes a first support arm 31 and a second support arm 32 arranged opposite to each other, the first support arm 31 has a first inclined end surface, one of the first inclined end surfaces abuts against the end of the first torsion component 1 away from the end where it is fixedly connected to the second torsion component 2, the second support arm 32 has a second inclined end surface, one of the second inclined end surfaces abuts against the end of the second torsion component 2 away from the end where it is fixedly connected to the first torsion component 1, and the width of the first support arm 31 and the second support arm 32 gradually decreases from the end away from the end where the first torsion component 1 and the second torsion component 2 are fixedly connected to the end close to the fixed connection;

[0048] When an external force is applied to drive the moving component 3 to move toward the end where the first torsion component 1 and the second torsion component 2 are fixedly connected, the first support arm 31 and the second support arm 32 drive the first torsion component 1 and the second torsion component 2 to twist, and the first torsion component 1 and the second torsion component 2 are twisted in opposite directions. After releasing the moving component 3, the first torsion component 1 and the second torsion component 2 twist in the opposite direction and drive the first support arm 31 and the second support arm 32 to move away from the end where the first torsion component 1 and the second torsion component 2 are fixedly connected.

[0049] The commonly used springs now include spiral composite springs and cage composite springs. The spiral composite spring is formed by winding the composite spring tightly into a spiral shape, but the manufacturing process of this spiral composite spring is too complicated, and the spiral structure is difficult to form, resulting in high manufacturing costs. The cage composite spring is composed of a composite spring sheet and a metal constraint frame. Although the manufacturing process is simple and the manufacturing cost is low, this spring has a complex structure, large size, and heavy weight and is not suitable for application scenarios with small thrust and large space size restrictions. In the present invention, by setting the first torsion component in the installation cavity of the second torsion component, and then installing the moving component on the second torsion component, a torsion bar elastic structure is formed, which can play the role of a spring, and its volume is small and weight is light. By adjusting the material of the torsion component, the layer angle, diameter, wall thickness and the rotation angle of the support arm, any stiffness, thrust, stroke linear and nonlinear spring stiffness design can be achieved, which is suitable for application scenarios with high requirements for thrust, weight and space. At the same time, it has a simple structure and is easy to install and manufacture.

[0050] Specifically, the first torsion assembly 1 includes an inner tube 11, a first rotating member 12, and a first torsion arm 13. The inner tube 11 is arranged in the installation cavity, one end of which is fixedly connected to the end surface of the installation cavity, and the other end extends out of the installation cavity; the first rotating member 12 is arranged at the end of the inner tube 11 extending out of the installation cavity; and the first torsion arm 13 is arranged on the first rotating member 12. In the embodiment of the present invention, the inner tube 11 can be set as a hollow tube or a solid tube. This embodiment does not limit the setting form of the inner tube 11. Those skilled in the art can change the setting form of the inner tube 11 according to actual conditions, as long as the same technical effect can be achieved.

[0051] Specifically, the second torsion assembly 2 includes an outer tube 21, a second rotating member 22 and a second torsion arm 23. The outer tube 21 has the installation cavity. The second rotating member 22 is arranged at one end of the outer tube 21 close to the first rotating member 12 and is located below the first rotating member 12. The second torsion arm 23 is arranged on the second rotating member 22. The end of the second torsion arm 23 can be provided with a rolling bearing or a smooth material with a small friction coefficient to reduce friction resistance. In the present invention, the outer tube 21 is set as a hollow tube. A gap is set between the outer tube 21 and the inner tube 11. The gap can ensure the relative rotation of the inner tube 11 and the outer tube 21, thereby generating torque.

[0052] Furthermore, the first rotating member 12 is threadedly connected to the inner tube 11, the second rotating member 22 is threadedly connected to the outer tube 21, the first torsion arm 13 can also be threadedly connected to the first rotating member 12, and the second torsion arm 23 can also be threadedly connected to the second rotating member 22. Of course, the first rotating member 12 and the inner tube 11, the second rotating member 22 and the outer tube 21 can be welded. This embodiment does not limit the connection method between the first rotating member 12 and the inner tube 11, and the connection method between the second rotating member 22 and the outer tube 21.

[0053] In an embodiment of the present invention, the first rotating member 12 and the second rotating member 22 can be configured as nuts, which are provided with internal threads inside, and the inner tube 11 and the outer tube 21 are provided with external threads. The first rotating member 12 is rotationally connected to the inner tube 11 through internal threads and external threads, and the second rotating member 22 is rotationally connected to the outer tube 21 through internal threads and external threads. In addition, the locking direction of the nut is the same as the torsion direction of the first torsion arm 13 and the second torsion arm 23, that is, the nut has a self-locking function during the torsion process.

[0054] Furthermore, in one implementation of the present embodiment, two first torsion arms 13 are provided on the first rotating member 12, and the two first torsion arms 13 are coaxially arranged, and the two first torsion arms 13 are respectively abutted against the first oblique end surface and the second oblique end surface; two second torsion arms 23 are provided on the second rotating member 22, and the two second torsion arms 23 are coaxially arranged, and the two second torsion arms 23 are respectively abutted against the first oblique end surface and the second oblique end surface.

[0055] Further, in another implementation of the present embodiment, a first torsion arm 13 is provided on the first rotating member 12, and a second torsion arm 23 is provided on the second rotating member 22. The first torsion arm 13 and the second torsion arm 23 are arranged opposite to each other or at an angle. The first torsion arm 13 abuts against the first oblique end surface, and the second torsion arm 23 abuts against the second oblique end surface. Alternatively, the first torsion arm 13 and the second torsion arm 23 are arranged at an angle, and both the first torsion arm 13 and the second torsion arm 23 abut against the first oblique end surface. By moving the first support arm 31 and the second support arm 32, the first torsion assembly and the second torsion assembly can also be driven to torsion.

[0056] Furthermore, in another implementation of the present embodiment, two first torsion arms 13 are provided on the first rotating member 12, one of the first torsion arms 13 is in contact with the first inclined end surface, and the other first torsion arm 13 is not in contact with the second inclined end surface; two second torsion arms 23 are provided on the second rotating member 22, one of the second torsion arms 23 is in contact with the second inclined end surface, and the other first torsion arm 13 is not in contact with the first inclined end surface.

[0057] Furthermore, in one implementation of the present embodiment, the first support arm 31 has two first oblique end surfaces, one of which abuts against one of the first torsion arms 13, and the other of which abuts against one of the second torsion arms 23; the second support arm 32 has two second oblique end surfaces, one of which abuts against another of the second torsion arms 23, and the other of which abuts against another of the first torsion arms 13.

[0058] Furthermore, in another implementation of the present embodiment, a first oblique end face is provided on one side of the first support arm 31, and a plane or vertical end face is provided on the other side, wherein the first oblique end face abuts against the first torsion arm 13, and the plane or vertical end face on the other side does not abut against the second torsion arm 23; similarly, a second oblique end face is provided on one side of the second support arm 32, and a plane or vertical end face is provided on the other side, and the second oblique end face is on the same side as the first oblique end face, wherein the second oblique end face abuts against the second torsion arm 23, and the plane or vertical end face on the other side does not abut against the first torsion arm 13.

[0059] Furthermore, the first oblique end face and the second oblique end face are both inclined in a spiral shape. In the embodiment of the present invention, by adjusting the spiral structure of the first oblique end face and the second oblique end face, an elastic structure with different thrusts and different strokes can be achieved, thereby improving the applicable range of the elastic structure. In addition, the spiral lines of the first oblique end face and the second oblique end face are both less than 180°, which greatly reduces the difficulty of manufacturing the spiral line compared to conventional metal multi-turn spiral lines.

[0060] In the embodiment of the present invention, by changing the material and the layer angle of the first torsion assembly 1 and the second torsion assembly 2, and changing the spiral structure angle of the first oblique end face and the second oblique end face, a large thrust linear spring with a stroke of 150 mm, a maximum thrust of 6085 N, and a total mass of 3.36 kg can be designed. At this time, the diameter of the inner tube 11 is set to 28 mm, the diameter of the outer tube 21 is set to 36 mm, the wall thickness of the outer tube 21 is set to 3 mm, and the gap between the inner tube 11 and the outer tube 12 is set to 1 mm. The thickness of the first support arm 31 and the second support arm 32 is set to 10 mm, the thickness of the support plate 34 is set to 5 mm, the mass of the first support arm 31, the second support arm 32 and the support plate 34 is set to 1.08 kg, the mass of the sleeve 33 is set to 0.08 kg, and the mass of the first torsion assembly 1 and the second torsion assembly 2 is set to 2.2 kg.

[0061] Furthermore, the first support arm 31 and the second support arm 32 are in an arc shape, and the arc axes thereof coincide with the axes of the inner tube 11 and the outer tube 21. By setting the first support arm 31 and the second support arm 32 to be in an arc shape, the first support arm 31 and the second support arm 32 can be better matched with the first torsion arm 13 and the second torsion arm 23.

[0062] Furthermore, the moving assembly 3 further includes a sleeve 33, which is sleeved on the second torsion assembly 2 and fixedly connected to one end of the first arm 31 and the second arm 32, and the sleeve 33 is suitable for reciprocating on the second torsion assembly 2. In the present invention, by providing the sleeve 33, the sleeve 33 can drive the moving assembly 3 to move along the axial direction of the first torsion assembly 1 more smoothly, play a good guiding role, and thus make the sliding of the moving assembly 3 more convenient.

[0063] Furthermore, the moving component 3 also includes a support plate 34, which is connected to the other end of the first arm 31 and the second arm 32. The first arm 31 and the second arm 32 are respectively arranged on both sides of the support plate 34. By pressing the support plate 34, the first arm 31 and the second arm 32 are driven to move, thereby driving the first torsion component and the second torsion component to twist.

[0064] In the present invention, by using composite materials to twist the inner tube 11 and the outer tube 21, the weight can be reduced by more than 60% compared with metal springs with the same performance. In addition, by changing the size and wall thickness of the inner tube 11 and the outer tube 21, various elastic structures with different performance requirements and large specifications can be manufactured, which are suitable for the separation device of the rocket fairing and scenes that are sensitive to weight requirements.

[0065] The specific working process of the torsion bar type elastic structure provided by the present invention is as follows:

[0066] First, external force acts on the support plate 34, driving the first support arm 31 and the second support arm 32 to move toward the fixed connection end of the inner tube 11 and the outer tube 21, and synchronously the sleeve 33 slides along the axis of the outer tube 21, and the first support arm 31 and the second support arm 32 drive the first torsion arm 13 and the second torsion arm 23 to rotate in opposite directions along the circumference, and the first torsion arm 13 and the second torsion arm 23 rotate, driving the first rotating member 12 and the second rotating member 22 to rotate, thereby driving the inner tube 11 and the outer tube 21 to twist and generate torque, and when the support plate 34 is released, the first torsion arm 13 and the second torsion arm 23 rotate towards each other under the action of torque, driving the first support arm 31 and the second support arm 32 to move toward the fixed connection end away from the inner tube 11 and the outer tube 21 until they return to their original state, completing the torsion and recovery of the elastic structure.

[0067] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A torsion bar elastic structure, characterized in that: include: A first torsion assembly (1); A second torsion assembly (2), the second torsion assembly (2) having an installation cavity with an opening at one end, the first torsion assembly (1) being arranged in the installation cavity, one end of the first torsion assembly (1) being fixedly connected to an end surface of the installation cavity, and the other end extending out of the installation cavity; A moving component (3), the moving component (3) is connected to the second torsion component (2) and can move along the axial direction of the second torsion component (2), and comprises a first support arm (31) and a second support arm (32) arranged opposite to each other, the first support arm (31) having a first oblique end face, one of the first oblique end faces abutting against an end of the first torsion component (1) away from the end where the first torsion component (1) is fixedly connected to the second torsion component (2), the second support arm (32) having a second oblique end face, one of the second oblique end faces abutting against an end of the second torsion component (2) away from the end where the first torsion component (1) is fixedly connected to the second torsion component (2), and the widths of the first support arm (31) and the second support arm (32) gradually decrease from the end away from the end where the first torsion component (1) is fixedly connected to the second torsion component (2) to the end close to the fixed connection; When an external force is applied to drive the moving component (3) to move toward an end where the first torsion component (1) and the second torsion component (2) are fixedly connected, the first support arm (31) and the second support arm (32) drive the first torsion component (1) and the second torsion component (2) to twist, and the first torsion component (1) and the second torsion component (2) twist in opposite directions; after the moving component (3) is released, the first torsion component (1) and the second torsion component (2) twist in the opposite direction and drive the first support arm (31) and the second support arm (32) to move away from an end where the first torsion component (1) and the second torsion component (2) are fixedly connected.

2. The torsion bar type elastic structure according to claim 1, characterized in that: The first torsion assembly (1) comprises: An inner tube (11) is arranged in the installation cavity, one end of which is fixedly connected to the end surface of the installation cavity, and the other end of which extends out of the installation cavity; A first rotating member (12) is arranged at one end of the inner tube (11) extending out of the installation cavity; The first torsion arm (13) is arranged on the first rotating member (12).

3. The torsion bar type elastic structure according to claim 2, characterized in that: The second torsion assembly (2) comprises: An outer tube (21) having the installation cavity; A second rotating member (22) is arranged at one end of the outer tube (21) close to the first rotating member (12) and is located below the first rotating member (12); The second torsion arm (23) is arranged on the second rotating member (22), and the end of the second torsion arm (23) is provided with a rolling bearing or a smooth material with a small friction coefficient.

4. The torsion bar type elastic structure according to claim 3, characterized in that: The first rotating member (12) is threadedly connected to the inner tube (11), and the second rotating member (22) is threadedly connected to the outer tube (21).

5. The torsion bar type elastic structure according to claim 3, characterized in that: The first rotating member (12) is provided with two first torsion arms (13), and the two first torsion arms (13) are coaxially arranged; the second rotating member (22) is provided with two second torsion arms (23), and the two second torsion arms (23) are coaxially arranged.

6. The torsion bar type elastic structure according to claim 5, characterized in that: The first support arm (31) has two first oblique end surfaces, one of which is in contact with one of the first torsion arms (13), and the other of which is in contact with one of the second torsion arms (23); the second support arm (32) has two second oblique end surfaces, one of which is in contact with another of the second torsion arms (23), and the other of which is in contact with another of the first torsion arms (13).

7. The torsion bar type elastic structure according to claim 1, characterized in that: The first oblique end surface and the second oblique end surface are both inclined in a spiral shape.

8. The torsion bar type elastic structure according to claim 1, characterized in that: The first support arm (31) and the second support arm (32) are in an arc shape.

9. The torsion bar type elastic structure according to any one of claims 1 to 8, characterized in that: The mobile component also includes: A sleeve (33) is sleeved on the second torsion assembly (2) and fixedly connected to the bottom ends of the first support arm (31) and the second support arm (32); the sleeve (33) is suitable for reciprocating movement on the second torsion assembly (2).

10. The torsion bar type elastic structure according to claim 9, characterized in that: The mobile component also includes: A support plate (34) is connected to the other ends of the first support arm (31) and the second support arm (32).

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