Anti-loosening structure

Abstract

The utility model relates to the field of fasteners, in particular to an anti-loose structure which comprises a lead screw, a turbine, a bearing and a nut, outer meshing teeth are arranged at the upper end of the lead screw, outer threads are further arranged on the lead screw at the upper ends of the outer meshing teeth, inner meshing teeth are arranged in the center of the turbine, and the inner meshing teeth on the turbine are connected with the outer meshing teeth on the lead screw in a meshed mode. The bearing is arranged between the outer meshing teeth and the outer threads on the lead screw, the center of the nut is provided with inner threads, the nut is connected with the outer threads on the lead screw through the inner threads, the lower portion of the nut is provided with a trapezoid protrusion, the side edges of the trapezoid protrusion are two symmetrically-arranged inclined faces, and an opening penetrating through the inner threads is formed in the periphery of the nut. The opening design is added to the nut with the trapezoid protrusion, the groove is added to the fixing piece, the trapezoid protrusion is matched with the groove, the nut is of the opening structure, the nut is squeezed by the turbine and the fastening bearing to be tighter and tighter, looseness is prevented, and the fastening effect can still be achieved even if the nut is disassembled and assembled many times.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, and specifically to an anti-loosening structure. Background Technology

[0002] Anti-loosening structures are used in many mechanical fastening fields. Currently, the loosening of screws and nuts of electric actuators is achieved by riveting or using anti-loosening adhesive. However, when using riveting, secondary disassembly is not possible, or forceful disassembly will damage the parts; anti-loosening adhesive requires a curing time and will lose its loosening effect after repeated use. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a novel anti-loosening structure. This structure adds an opening to the nut with a trapezoidal protrusion and adds a groove to the fastener, allowing the trapezoidal protrusion to fit into the groove. Furthermore, the nut's open structure, combined with the compression from the turbine and the fastening bearing, makes it increasingly tighter, preventing loosening. Even after multiple disassemblies and reassemblies, it can still achieve a fastening effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anti-loosening structure includes a lead screw, a turbine, a bearing, and a nut. The upper end of the lead screw is provided with external meshing teeth, and the lead screw above the external meshing teeth is also provided with external threads. The turbine is provided with internal meshing teeth at its center, and the internal meshing teeth on the turbine and the external meshing teeth on the lead screw mesh with each other. The bearing is located between the external meshing teeth and the external threads on the lead screw. The nut is provided with internal threads at its center, and the nut is connected to the external threads on the lead screw through the internal threads.

[0006] Furthermore, the inner ring of the bearing is provided with a groove, and the external thread on the upper part of the lead screw extends to the groove inside the turbine.

[0007] Furthermore, the lower part of the nut is provided with a trapezoidal protrusion, and the side of the trapezoidal protrusion is two symmetrically arranged inclined surfaces. The inclined surfaces are arranged in correspondence with the groove inside the inner ring of the bearing, and the minimum distance between the two inclined surfaces is less than the diameter of the outer ring of the groove, while the maximum distance between the two inclined surfaces is greater than the diameter of the outer ring of the groove.

[0008] Furthermore, the end face of the nut is designed with a C-shape, and an opening through the internal thread is provided around the nut.

[0009] The beneficial effects of this utility model are:

[0010] An anti-loosening structure includes a lead screw, a turbine, a bearing, and a nut. The upper end of the lead screw is provided with external meshing teeth, and the lead screw above the external meshing teeth is also provided with external threads. The turbine is provided with internal meshing teeth at its center, and the internal meshing teeth on the turbine mesh with the external meshing teeth on the lead screw. The bearing is located between the external meshing teeth and the external threads on the lead screw. The center of the nut is provided with internal threads, and the nut is connected to the external threads on the lead screw through the internal threads. The lower part of the nut is provided with a trapezoidal protrusion, and the sides of the trapezoidal protrusion are two symmetrically arranged inclined surfaces. The end face of the nut has a C-shaped structure design. An opening that penetrates the internal threads is provided around the nut. By adding an opening design to the nut with trapezoidal protrusion and adding a groove to the fastener, the trapezoidal protrusion and the groove are matched. The nut adopts an open structure, and is increasingly tightened by the pressure of the turbine and the fastening bearing, preventing loosening. Even after multiple disassemblies and reassemblies, the fastening effect can still be achieved. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is an exploded structural diagram of the present invention;

[0013] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 4 This is a schematic diagram of the nut in this utility model. Detailed Implementation

[0015] The following is in conjunction with the appendix Figures 1 to 4 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or / several" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] As shown in the figure: This utility model discloses an anti-loosening structure, including a lead screw 1, a turbine 2, a bearing 3, and a nut 4. The upper end of the lead screw 1 is provided with an external meshing tooth 11, and the lead screw 1 at the upper end of the external meshing tooth 11 is also provided with an external thread 12. The turbine 2 is provided with an internal meshing tooth 21 at its center, and the internal meshing tooth 21 on the turbine 2 meshes with the external meshing tooth 11 on the lead screw 1. The bearing 3 is located between the external meshing tooth 11 and the external thread 12 on the lead screw 1. The center of the nut 4 is provided with an internal thread 40, and the nut 4 is connected to the external thread 12 on the lead screw 1 through the internal thread 40.

[0018] The inner ring of the bearing 3 has a groove 31. The external thread 12 on the upper part of the lead screw 1 extends to the groove 31 inside the turbine 2. The groove 31 on the bearing 3 facilitates the inward pressing of the nut 4. The extension of the external thread 12 to the groove 31 can increase the amount of movement for tightening the nut 4.

[0019] The lower part of the nut 4 is provided with a trapezoidal protrusion, and the sides of the trapezoidal protrusion are two symmetrically arranged inclined surfaces 41. The inclined surfaces 41 are corresponding to the groove 31 inside the inner ring of the bearing 3. The minimum distance between the two inclined surfaces 41 is less than the diameter of the outer ring of the groove 31, and the maximum distance between the two inclined surfaces 41 is greater than the diameter of the outer ring of the groove 31. The trapezoidal protrusion at the lower part of the nut 4 cooperates with the groove 31 on the bearing 3. The inclined surfaces 41 can fasten the groove 31. When the bearing 3 is loose, the inclined surfaces 41 can also generate reverse pressure on the bearing 3 to prevent the bearing 3 from loosening.

[0020] The end face of the nut 4 is designed with a C-shape. There is an opening 42 around the nut 4 through the internal thread 40. The nut 4 adopts a C-shape structure with an opening. When the bearing 3 loosens and exerts a thrust on the nut 4, the trapezoidal protrusion at the bottom of the nut 4 is squeezed, so that the opening 42 is subjected to an inward force. As a result, the internal thread 40 of the nut 4 also engages more tightly with the external thread 12 on the lead screw 1, which has an anti-loosening effect. The nut 4 adopts a C-shape structure with an opening, which can be cyclically disassembled and assembled with a wrench without affecting the tightening performance.

[0021] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A loosening prevention structure comprising a screw rod (1), a turbine (2), a bearing (3), and a nut (4), characterized in that: The upper end of the screw rod (1) is provided with an external gear (11), and the upper end of the external gear (11) is further provided with an external thread (12) on the screw rod (1), the turbine (2) is provided with an internal gear (21) at the center, the internal gear (21) on the turbine (2) is connected with the external gear (11) on the screw rod (1) through mutual engagement, the bearing (3) is arranged between the external gear (11) and the external thread (12) on the screw rod (1), the center of the nut (4) is provided with an internal thread (40), and the nut (4) is connected with the external thread (12) on the screw rod (1) through the internal thread (40).

2. The anti-loosening structure according to claim 1, characterized in that: The inner ring of the bearing (3) is internally provided with a groove (31), and the external thread (12) on the upper part of the screw rod (1) extends to the groove (31) in the turbine (2).

3. The anti-loosening structure according to claim 1, characterized in that: The lower part of the nut (4) is provided with a trapezoidal protrusion, the side edges of the trapezoidal protrusion are two symmetrically arranged inclined surfaces (41), the inclined surfaces (41) are correspondingly arranged with the groove (31) in the inner ring of the bearing (3), and the minimum distance between the two inclined surfaces (41) is less than the diameter of the outer ring of the groove (31), and the maximum distance between the two inclined surfaces (41) is greater than the diameter of the outer ring of the groove (31).

4. The anti-loosening structure according to claim 1, characterized in that: The end surface of the nut (4) is designed in a C-shaped structure, and the nut (4) is provided with an opening (42) penetrating through the internal thread (40) around the nut (4).

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