A torsion bar type elastic structure

Abstract

The application provides a torsion bar type elastic structure, which comprises a first torsion assembly, a second torsion assembly and a moving assembly, the second torsion assembly has a mounting cavity, the first torsion assembly is arranged in the mounting cavity, one end of the first torsion assembly is fixedly connected with an end surface of the mounting cavity, and the other end of the first torsion assembly extends out of the outside of the mounting cavity; the moving assembly is connected with the second torsion assembly and can move along the axial direction of the second torsion assembly, the moving assembly comprises oppositely arranged first and second supporting arms, the first supporting arm has a first inclined end surface, the first inclined end surface is in abutment with the first torsion assembly, the second supporting arm has a second inclined end surface, and the second inclined end surface is in abutment with the second torsion assembly. In the application, the above structure can play the role of a spring, the volume of the application is relatively small, the weight of the application is relatively light, the application is suitable for application scenarios with high requirements on thrust, weight and space, and the structure of the application is simple, and the application is convenient to install and manufacture.

Description

Technical Field

[0001] This invention relates to the field of torsion bar technology, and more specifically to a torsion bar elastic structure. Background Technology

[0002] Springs are a very common type of elastic structure. Most common springs are made of metal materials such as stainless steel, copper alloy, and nickel alloy tightly wound into a spiral shape. Metal springs are limited by the material itself, resulting in lower specific stiffness and specific strength, and it is difficult to achieve nonlinear spring thrust design, thus making it difficult to manufacture ultra-large springs.

[0003] Based on this, composite material springs were designed. These springs utilize composite materials such as carbon fiber and glass fiber, giving them higher specific stiffness, specific strength, and excellent fatigue performance and corrosion resistance. Helical composite springs are formed by tightly winding composite springs into a spiral shape; however, the manufacturing process for these helical composite springs is overly complex, and the helical structure is difficult to form, resulting in high manufacturing costs. Cage-type composite springs consist of composite spring sheets and a metal constraint frame. Although the manufacturing process is simple and the cost is low, this type of spring has a complex structure, large size, and heavy weight, making it unsuitable for applications with low thrust and large space constraints. 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 and heavy, and not suitable for application scenarios with small thrust and large space constraints. Therefore, a torsion bar elastic structure is invented, which can achieve arbitrary linear and nonlinear spring stiffness design by designing the torsion component material, ply direction, thickness and helix angle of the inclined end face, and is suitable for most spring application scenarios.

[0005] Therefore, the present invention provides a torsion bar elastic structure, comprising:

[0006] First torsion assembly;

[0007] The second torsion assembly has a mounting cavity with one end open. The first torsion assembly is disposed in the mounting cavity, with one end fixedly connected to the end face of the mounting cavity and the other end extending out of the outside of the mounting cavity.

[0008] A movable component, connected to the second torsion component and movable along the axial direction of the second torsion component, includes a first arm and a second arm disposed opposite to each other. The first arm has a first inclined end face, one of which abuts against the end of the first torsion component away from its fixed connection with the second torsion component. The second arm has a second inclined end face, one of which abuts against the end of the second torsion component away from its fixed connection with the first torsion component. The width of the first arm and the second arm gradually decreases from the end away from the fixed connection between the first torsion component and the second torsion component to the end closer to the fixed connection.

[0009] When an external force is applied to drive the moving component to move closer to the end where the first torsion component and the second torsion component are fixedly connected, the first arm and the second arm drive the first torsion component and the second torsion component to twist, and the first torsion component and the second torsion component twist in opposite directions. After the moving component is released, the first torsion component and the second torsion component twist in opposite directions and drive the first arm and the second 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 component includes:

[0011] An inner tube is disposed in the mounting cavity, with one end fixedly connected to the end face of the mounting cavity and the other end extending out of the mounting cavity;

[0012] The first rotating component is disposed at the end of the inner tube that extends out of the mounting cavity;

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

[0014] Optionally, the second torsion component includes:

[0015] The outer tube has the mounting cavity;

[0016] The second rotating component is disposed at one end of the outer tube near the first rotating component and located below the first rotating component;

[0017] The second torsion arm is mounted on the second rotating member, and the end of the second torsion arm is provided with a rolling bearing or is made of a smooth material with a low coefficient of friction.

[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, the first rotating member is provided with two first torsion arms, and the two first torsion arms are arranged coaxially; the second rotating member is provided with two second torsion arms, and the two second torsion arms are arranged coaxially.

[0020] Optionally, the first arm has two first inclined end faces, one of which abuts against a first torsion arm and the other of which abuts against a second torsion arm; the second arm has two second inclined end faces, one of which abuts against another second torsion arm and the other of which abuts against another first torsion arm.

[0021] Optionally, both the first inclined end face and the second inclined end face are 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 fitted onto the second torsion assembly and is fixedly connected to one end of the first support arm and the second support arm. The sleeve is adapted to reciprocate on the second torsion assembly.

[0025] Optionally, the moving component further includes:

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

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

[0028] 1. This invention provides a torsion bar elastic structure. By placing a first torsion component within the mounting cavity of a second torsion component, and then mounting a movable component on the second torsion component, driving the movable component to move causes the first and second torsion components to rotate, generating torque. Upon releasing the movable component, it returns to its initial state under the torque of the first and second torsion components. In this invention, by configuring the first torsion component, the second torsion component, and the movable component, it can function as a spring. This spring structure is small in size and lightweight. By adjusting the torsion component material, ply angle, diameter, wall thickness, and arm rotation angle, arbitrary stiffness, thrust, and linear or nonlinear spring stiffness designs can be achieved. It is suitable for applications with high requirements for thrust, weight, and space. Furthermore, its structure is simple, and it is easy to install and manufacture.

[0029] 2. This invention provides a torsion bar type elastic structure. The moving component includes a first arm and a second arm disposed opposite to each other. The first arm has a first inclined end face, one of which abuts against the end of the first torsion component away from its fixed connection with the second torsion component. The second arm has a second inclined end face, one of which abuts against the end of the second torsion component away from its fixed connection with the first torsion component. Both the first and second inclined end faces are inclined in a spiral shape. In this invention, by adjusting the spiral structure of the first and second inclined end faces, elastic structures with different thrusts and strokes can be achieved, thereby improving the applicability of the elastic structure.

[0030] 3. This invention provides a torsion bar elastic structure. The moving component further includes a sleeve, which is sleeved on the second torsion component and fixedly connected to one end of the first and second support arms. The sleeve is adapted to reciprocate on the second torsion component. In this invention, by providing the sleeve, the moving component can be moved more smoothly along the axial direction of the first torsion component, providing a good guiding effect and making the sliding of the moving component more convenient. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

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

[0034] Figure 3 This is a schematic cross-sectional view of the torsion assembly of the present invention;

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

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

[0037] Explanation of reference numerals in the embodiments:

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

[0039] 11. Inner tube; 12. First rotating component; 13. First torsion arm;

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

[0041] 31. First arm; 32. Second arm; 33. Sleeve; 34. Support plate. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] Furthermore, 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 elastic structure, including a first torsion component 1, a second torsion component 2, and a moving component 3. The second torsion component 2 has a mounting cavity with one end open. The first torsion component 1 is disposed in the mounting cavity, with one end fixedly connected to the end face of the mounting cavity and the other end extending out of the mounting 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. It includes a first support arm 31 and a second support arm 32 disposed opposite to each other. The first support arm 31 has a first inclined end face, and one of the first inclined end faces abuts against the end of the first torsion component 1 away from its fixed connection with the second torsion component 2. The second support arm 32 has a second inclined end face, and one of the second inclined end faces abuts against the end of the second torsion component 2 away from its fixed connection with the first torsion component 1. The width of the first support arm 31 and the second support arm 32 gradually decreases from the end away from the fixed connection with the first torsion component 1 to the end closer to the fixed connection.

[0048] When an external force is applied to drive the moving component 3 to move closer to 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 twist in opposite directions. After the moving component 3 is released, the first torsion component 1 and the second torsion component 2 twist in opposite directions 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] Currently used springs include helical composite springs and cage composite springs. Helical composite springs are formed by tightly winding composite springs into a helix, but the manufacturing process of such springs is too complex, and the helical structure is difficult to form, resulting in high manufacturing costs. Cage composite springs consist of composite spring sheets and a metal constraint frame. Although the manufacturing process is simple and the manufacturing cost is low, this type of spring has a complex structure, large size, and heavy weight, making it unsuitable for applications with low thrust and large space constraints. In this invention, by placing the first torsion component in the mounting cavity of the second torsion component and then mounting the moving component on the second torsion component, a torsion bar elastic structure is formed, which can function as a spring. It is also small in size and light in weight. By adjusting the material, ply angle, diameter, wall thickness, and arm rotation angle of the torsion component, arbitrary stiffness, thrust, and linear or nonlinear spring stiffness designs can be achieved. This makes it suitable for applications with high requirements for thrust, weight, and space. At the same time, its structure is simple and 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 disposed in the mounting cavity, with one end fixedly connected to the end face of the mounting cavity and the other end extending out of the mounting cavity. The first rotating member 12 is disposed at the end of the inner tube 11 extending out of the mounting cavity. The first torsion arm 13 is disposed on the first rotating member 12. In this embodiment of the invention, the inner tube 11 can be a hollow tube or a solid tube. This embodiment does not limit the form of the inner tube 11. Those skilled in the art can change the form of the inner tube 11 according to the actual situation, 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 mounting cavity. The second rotating member 22 is disposed at one end of the outer tube 21 near the first rotating member 12 and below the first rotating member 12. The second torsion arm 23 is disposed on the second rotating member 22, and the end of the second torsion arm 23 may be provided with a rolling bearing or a smooth material with a low coefficient of friction to reduce frictional resistance. In this invention, the outer tube 21 is a hollow tube, and a gap is provided between the outer tube 21 and the inner tube 11. The gap ensures 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, and 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, and the second rotating member 22 and the outer tube 21 can all be welded together. In this embodiment, 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 are not limited.

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

[0054] Furthermore, in one embodiment of this invention, the first rotating member 12 is provided with two first torsion arms 13, and the two first torsion arms 13 are coaxially arranged, and the two first torsion arms 13 abut against the first inclined end face and the second inclined end face respectively; the second rotating member 22 is provided with two second torsion arms 23, and the two second torsion arms 23 are coaxially arranged, and the two second torsion arms 23 abut against the first inclined end face and the second inclined end face respectively.

[0055] Furthermore, in another embodiment of this invention, 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 inclined end face, and the second torsion arm 23 abuts against the second inclined end face; 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 inclined end face. 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 twist.

[0056] Furthermore, in another embodiment of this invention, the first rotating member 12 is provided with two first torsion arms 13, one of which abuts against the first inclined end face, and the other of which does not abut against the second inclined end face; the second rotating member 22 is provided with two second torsion arms 23, one of which abuts against the second inclined end face, and the other of which does not abut against the first inclined end face.

[0057] Furthermore, in one embodiment of this example, the first support arm 31 has two first inclined end faces, 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 inclined end faces, 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 embodiment of this invention, the first support arm 31 has a first inclined end face on one side and a planar or vertical end face on the other side, wherein the first inclined end face abuts against the first torsion arm 13, and the planar or vertical end face on the other side does not abut against the second torsion arm 23; similarly, the second support arm 32 has a second inclined end face on one side and a planar or vertical end face on the other side, wherein the second inclined end face is on the same side as the first inclined end face, wherein the second inclined end face abuts against the second torsion arm 23, and the planar or vertical end face on the other side does not abut against the first torsion arm 13.

[0059] Furthermore, both the first and second inclined end faces are inclined in a spiral shape. In this embodiment of the invention, by adjusting the spiral structure of the first and second inclined end faces, elastic structures with different thrusts and strokes can be achieved, thereby improving the applicability of the elastic structure. In addition, the spiral angles of both the first and second inclined end faces are less than 180°, which greatly reduces the manufacturing difficulty of the spiral compared to conventional multi-turn metal spirals.

[0060] In this embodiment of the invention, by changing the materials and ply angles of the first torsion assembly 1 and the second torsion assembly 2, as well as changing the helical structure angles of the first and second inclined end faces, a high-thrust linear spring with a stroke of 150mm, a maximum thrust of 6085N, and a total mass of 3.36kg can be designed. In this case, the inner tube 11 has a diameter of 28mm, the outer tube 21 has a diameter of 36mm, the outer tube 21 has a wall thickness of 3mm, and the gap between the inner tube 11 and the outer tube 21 is 1mm. The thickness of the first support arm 31 and the second support arm 32 is 10mm, the thickness of the support plate 34 is 5mm, the mass of the first support arm 31, the second support arm 32, and the support plate 34 is 1.08kg, the mass of the sleeve 33 is 0.08kg, and the mass of the first torsion assembly 1 and the second torsion assembly 2 is 2.2kg.

[0061] Furthermore, the first support arm 31 and the second support arm 32 are arc-shaped, and their arc axis coincides with the axis 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 arc-shaped, the first support arm 31 and the second support arm 32 can better cooperate with the first torsion arm 13 and the second torsion arm 23.

[0062] Furthermore, the moving component 3 also includes a sleeve 33, which is sleeved on the second torsion component 2 and fixedly connected to one end of the first support arm 31 and the second support arm 32. The sleeve 33 is adapted to reciprocate on the second torsion component 2. In this invention, by providing the sleeve 33, the moving component 3 can move more smoothly along the axial direction of the first torsion component 1, providing a good guiding effect and making the sliding of the moving component 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 support arm 31 and the second support arm 32. The first support arm 31 and the second support arm 32 are respectively disposed on both sides of the support plate 34. By pressing the support plate 34, the first support arm 31 and the second support arm 32 are moved, thereby driving the first torsion component and the second torsion component to torsion.

[0064] In this invention, by using composite materials to torsionally configure the inner tube 11 and the outer tube 21, the weight can be reduced by more than 60% compared to a metal spring with the same performance. In addition, by changing the size and wall thickness of the inner tube 11 and the outer tube 21, various large-scale elastic structures with different performance requirements can be manufactured, which are suitable for rocket fairing separation devices and scenarios where weight requirements are sensitive.

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

[0066] First, an external force is applied to the support plate 34, causing 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. Simultaneously, the sleeve 33 slides along the axis of the outer tube 21. 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 around the circumference. The rotation of the first torsion arm 13 and the second torsion arm 23 causes the first rotating component 12 and the second rotating component 22 to rotate, thereby causing the inner tube 11 and the outer tube 21 to twist, generating torque. When the support plate 34 is released, the first torsion arm 13 and the second torsion arm 23 rotate in opposite directions under the action of torque, causing the first support arm 31 and the second support arm 32 to move away from the fixed connection end of 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 illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A torsion bar elastic structure, characterized in that, include: First torsion component (1); The second torsion assembly (2) has a mounting cavity with one end open. The first torsion assembly (1) is disposed in the mounting cavity, with one end fixedly connected to the end face of the mounting cavity and the other end extending out of the mounting cavity. A movable component (3) is connected to the second torsion component (2) and is movable along the axial direction of the second torsion component (2). It includes a first arm (31) and a second arm (32) disposed opposite to each other. The first arm (31) has a first inclined end face, one of which abuts against the end of the first torsion component (1) away from the end that is fixedly connected to the second torsion component (2). The second arm (32) has a second inclined end face, one of which abuts against the end of the second torsion component (2) away from the end that is fixedly connected to the first torsion component (1). The width of the first arm (31) and the second arm (32) gradually decreases from the end away from the fixed connection between the first torsion component (1) and 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 closer to 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) twist in opposite directions. After the moving component (3) is released, the first torsion component (1) and the second torsion component (2) twist in opposite directions 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.

2. The torsion bar elastic structure according to claim 1, characterized in that, The first torsion component (1) includes: An inner tube (11) is disposed in the mounting cavity, one end of which is fixedly connected to the end face of the mounting cavity, and the other end extends out of the mounting cavity; The first rotating component (12) is disposed at one end of the inner tube (11) that extends out of the mounting cavity; The first torsion arm (13) is disposed on the first rotating member (12).

3. The torsion bar elastic structure according to claim 2, characterized in that, The second torsion assembly (2) includes: The outer tube (21) has the mounting cavity; The second rotating member (22) is disposed at one end of the outer tube (21) near the first rotating member (12) and located below the first rotating member (12); The second torsion arm (23) is disposed on the second rotating member (22), and the end of the second torsion arm (23) is provided with a rolling bearing or is made of a smooth material with a low coefficient of friction.

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

5. The torsion bar 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 arranged on the same axis; the second rotating member (22) is provided with two second torsion arms (23), and the two second torsion arms (23) are arranged on the same axis.

6. The torsion bar elastic structure according to claim 5, characterized in that, The first arm (31) has two first inclined end faces, one of which abuts against a first torsion arm (13) and the other of which abuts against a second torsion arm (23); the second arm (32) has two second inclined end faces, one of which abuts against another second torsion arm (23) and the other of which abuts against another first torsion arm (13).

7. The torsion bar elastic structure according to claim 1, characterized in that, Both the first inclined end face and the second inclined end face are inclined in a spiral shape.

8. The torsion bar elastic structure according to claim 1, characterized in that, The first arm (31) and the second arm (32) are arc-shaped.

9. The torsion bar elastic structure according to any one of claims 1 to 8, characterized in that, The moving component also includes: A sleeve (33) is fitted onto the second torsion assembly (2) and is fixedly connected to the bottom ends of the first support arm (31) and the second support arm (32). The sleeve (33) is adapted to reciprocate on the second torsion assembly (2).

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

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