Extension spring and connecting structure for driving extension spring to deform

Abstract

The invention relates to the technical field of mechanical engineering, in particular to an extension spring which can be driven by a connecting structure to deform and specifically comprises a spring body, an extension arm and a flat circle, the extension arm is arranged in the axis direction of the spring body, and the extension arm is connected to the end of the spring body; the flat rings are arranged in the direction perpendicular to the extension arms and connected to the ends of the extension arms, so that the extension spring forms a hollow end structure in the axis direction. Therefore, when the lead screw of the connecting structure is used for driving the extension spring to deform, the lead screw can be embedded into the extension spring, and therefore the space utilization rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical engineering, and specifically provides a tension spring and a connection structure for driving the tension spring to deform. Background Art

[0002] Cylindrical helical tension springs are widely used in mechanical equipment and instruments. The end structures mainly include semicircular hooks, round hooks, long-arm semicircular hooks, adjustable tension springs, and rotatable hooks at both ends. The selection of the spring end structure type needs to be determined according to the specific assembly and fixing method.

[0003] Most of the existing cylindrical helical tension springs are hook-type, and the tension springs with hook-type end structures and the connecting piece have unfixed rotational freedom around the central axis. In automated instruments and equipment, sometimes the tension spring needs to be deformed by a screw rod, which requires the tension spring to be fixedly connected to the connecting piece.

[0004] In addition, in order to make the instrument more compact, other components such as the lead screw need to be embedded inside the tension spring. However, the end structure of the existing tension spring occupies the center position of the tension spring along the axis direction, which has low space utilization, resulting in the lead screw being unable to be arranged inside the tension spring and drive the tension spring to deform. Summary of the invention

[0005] In order to solve the above-mentioned problem, the present invention provides a tension spring and a connecting structure for driving the tension spring to deform. By setting the tension spring to have a hollow end structure, when the tension spring is driven to deform by using a screw rod of the connecting structure, the screw rod can be embedded in the interior of the tension spring, thereby improving space utilization.

[0006] A tension spring provided by an embodiment of the first aspect of the present invention is capable of generating deformation under the drive of a connecting structure, and specifically comprises a spring body, an extension arm and a flat circle, wherein the extension arm is arranged along the axial direction of the spring body, and the extension arm is connected to the end of the spring body; the flat circle is arranged in a direction perpendicular to the extension arm, and the flat circle is connected to the end of the extension arm, so that the tension spring forms a hollow end structure along the axial direction.

[0007] Preferably, the flat circle is a circular structure.

[0008] Preferably, the outer diameter D of the spring body, the wire diameter d of the spring body and the diameter D' of the flat circle meet the following conditions: D-D'≥2d.

[0009] The embodiment of the second aspect of the present invention provides a connection structure for driving a tension spring to deform, which is applied to driving the tension spring provided by the embodiment of the first aspect to deform, and specifically includes a connecting piece, a screw rod and a nut. A connecting block is provided at one end of the connecting piece, and the connecting block is used to connect with the tension spring. The centers of the connecting piece and the connecting block are provided with through threaded holes along the axial direction; the screw rod is screwed into the threaded hole; an external thread is provided on the outside of the connecting block, and the nut is screwed into the external thread. The nut is used to connect the tension spring to the connecting piece.

[0010] Compared with the prior art, the present invention can achieve the following beneficial effects: a tension spring, which can be deformed under the drive of a connection structure, specifically comprises a spring body, an extension arm and a flat circle, wherein the extension arm is arranged along the axial direction of the spring body, and the extension arm is connected to the end of the spring body; the flat circle is arranged in a direction perpendicular to the extension arm, and the flat circle is connected to the end of the extension arm, so that the tension spring forms a hollow end structure along the axial direction. Thus, when the screw rod of the connection structure is used to drive the tension spring to deform, the screw rod can be embedded in the interior of the tension spring, thereby improving space utilization.

[0011] By limiting the outer diameter D of the spring body, the wire diameter d of the spring body and the diameter D' of the flat circle, the hollow end structure of the tension spring has enough space to meet the requirements of the spring forming process and reserve space for installing the nut.

[0012] Among them, when the connecting structure is used to drive the tension spring to deform, as the lead screw is adjusted to drive the tension spring, the lead screw can pass through the flat circle and embed into the interior of the tension spring, thereby greatly reducing the overall volume of the connecting structure and the tension spring, achieving a compact layout, and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a structural schematic diagram from a first perspective of a tension spring provided by an embodiment of the first aspect of the present invention; Figure 2 yes Figure 1 A schematic structural diagram of the extension spring of the illustrated embodiment from a second viewing angle; Figure 3 It is a schematic diagram of the combined structure of a connecting structure for driving a tension spring to deform and a tension spring provided in an embodiment of the second aspect of the present invention.

[0014] Reference numerals include: 1 spring body, 2 extension arm, 3 flat circle, 4 connecting piece, 41 connecting block, 42 ​​limiting groove, 5 screw rod, 6 nut. DETAILED DESCRIPTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same modules are represented by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, the detailed description thereof will not be repeated.

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0017] Refer to the following Figures 1 to 3 A tension spring and a connection structure for driving the tension spring to deform are described according to some embodiments of the present invention.

[0018] like Figure 1 to Figure 2 As shown, a tension spring provided according to an embodiment of the first aspect of the present invention can be deformed under the drive of a connecting structure, and specifically includes a spring body 1, an extension arm 2 and a flat circle 3. The extension arm 2 is arranged along the axial direction of the spring body 1, and the extension arm 2 is integrally connected to the end of the spring body 1. The flat circle 3 is arranged in a direction perpendicular to the extension arm 2, so that the flat circle 3 is perpendicular to the stretching direction of the tension spring, and the flat circle 3 is integrally connected to the end of the extension arm 2, so that the tension spring forms a hollow end structure along the axial direction, providing an installation space for the connecting structure that drives the tension spring to deform. As a result, when the screw rod 5 of the connecting structure is used to drive the tension spring to deform, the screw rod 5 can be embedded in the interior of the tension spring, thereby improving space utilization.

[0019] Among them, there is a connection with a smooth transition between the extended arm 2 and the spring body 1, and between the flat circle 3 and the extended arm 2, so that when the spring body 1 is processed, the extended arm 2 and the flat circle 3 can be integrally formed with the spring body 1, providing a transition space for the processing and forming of the flat circle 3, while improving the overall strength of the tension spring.

[0020] The hollow end structure here refers to that the end of the tension spring is arranged as a hollow structure along the axial direction, which is different from the traditional tension spring in which a hook is arranged at the end.

[0021] like Figure 1 to Figure 2 As shown, the flat circle 3 is a circular structure, which is used to fix the tension spring to the connecting structure that drives the tension spring to deform through the flat circle 3.

[0022] like Figure 1 to Figure 2 As shown, the outer diameter D of the spring body 1, the wire diameter d of the spring body 1 and the diameter D' of the flat circle 3 meet the following conditions: D-D'≥2d.

[0023] Specifically, by limiting the outer diameter D of the spring body 1, the wire diameter d of the spring body 1 and the diameter D' of the flat circle 3, the hollow end structure of the tension spring has enough space to meet the requirements of the spring forming process and facilitate processing; at the same time, the hollow end structure can reserve space for installing the nut.

[0024] like Figure 3 As shown, a connection structure for driving the deformation of a tension spring provided in an embodiment of the second aspect of the present invention is applied to drive the deformation of the tension spring provided in the embodiment of the first aspect, and specifically includes a connector 4, a screw 5 and a nut 6. A connecting block 41 is provided at one end of the connector 4, and the connecting block 41 is used to connect with the tension spring. The centers of the connector 4 and the connecting block 41 are provided with through threaded holes along the axial direction, and the screw 5 is screwed into the threaded hole, so that the screw 5, the connector 4 and the connecting block 41 together constitute a screw nut driving mechanism, which converts the rotation of the screw 5 into the linear motion of the connector 4, thereby driving the tension spring to deform. An external thread is provided on the outside of the connecting block 41, and the nut 6 is screwed onto the external thread. The nut 6 is used to clamp and fix the tension spring to the connector 4.

[0025] Specifically, when the connecting structure is used to drive the tension spring to deform, the flat circle 3 and the extension arm 2 of the tension spring are sleeved on the outside of the connecting block 41, so that the flat circle 3 is against the bottom of the connecting block 41; at this time, the nut 6 is screwed to the external thread, and the nut 6 is located at the hollow end structure of the tension spring. Since the tension spring has limited the dimensions of the outer diameter D of the spring body 1, the wire diameter d of the spring body 1, and the diameter D' of the flat circle 3, the flat circle 3 can be pressed when the nut 6 is tightened, thereby achieving a fixed connection between the tension spring and the connecting structure.

[0026] Therefore, when the connecting structure is used to drive the tension spring to deform, as the screw rod 5 is adjusted to drive the tension spring, the screw rod 5 can pass through the flat circle 3 and be embedded in the tension spring, thereby greatly reducing the overall volume of the connecting structure and the tension spring, achieving a compact layout, and improving space utilization.

[0027] It is understandable that the arrangement direction of the connecting block 41, the nut 6, etc. on the connecting member 4 is not limited here. Figure 3 As shown, the nut 6 is arranged on the right side of the connecting member 4, and the tension spring is stretched to the left side. In some possible embodiments, the nut 6 is arranged on the left side of the connecting member 4, and the tension spring is stretched to the right side.

[0028] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0029] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A tension spring capable of deforming under the drive of a connecting structure, characterized in that: include: Spring body (1); An extended arm (2), the extended arm (2) being arranged along the axial direction of the spring body (1), and the extended arm (2) being connected to the end of the spring body (1); A flat circle (3), wherein the flat circle (3) is arranged in a direction perpendicular to the extension arm (2), and the flat circle (3) is connected to the end of the extension arm (2) so that the tension spring forms a hollow end structure along the axial direction.

2. The tension spring according to claim 1, characterized in that: The flat circle (3) is a circular structure.

3. The tension spring according to claim 2, characterized in that: The outer diameter D of the spring body (1), the wire diameter d of the spring body (1) and the diameter D' of the flat circle (3) meet the following conditions: D-D'≥2d.

4. A connection structure for driving a tension spring to deform, used for driving the tension spring described in any one of claims 1 to 3 to deform, characterized in that: include: A connecting member (4), wherein one end of the connecting member (4) is provided with a connecting block (41), the connecting block (41) is used to be connected to the tension spring, and the connecting member (4) and the connecting block (41) are provided with through threaded holes at their centers along the axial direction; A screw rod (5), the screw rod (5) being screwed into the threaded hole; A nut (6), wherein an external thread is formed on the outside of the connecting block (41), and the nut (6) is screwed onto the external thread. The nut (6) is used to connect the tension spring to the connecting piece (4).

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