Internal locking screw

Abstract

The utility model belongs to the technical field of connecting pieces, and particularly relates to an internal locking screw which comprises a main shaft and a nut assembly, a thread part is arranged at the top of the main shaft, the nut assembly comprises a first main body and a second main body, the first main body is upwards provided with a cylinder, and an inverted-horn-shaped expansion piece is integrally formed at the top of the cylinder. The expansion piece comprises a plurality of expansion pieces and movable positions arranged between the expansion pieces, first threads are arranged on the outer side of the cylinder and the outer sides of the expansion pieces, second threads are arranged on the inner side of the cylinder, the second body inner hole is connected with the first threads, the second threads are connected with the thread part, and the movable positions are arranged between the expansion pieces. And a better locking effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to an internal locking screw. Background Technology

[0002] A hub motor is a motor housed inside the wheel. Its key feature is that it integrates the power, transmission, and braking systems into the wheel hub, thus greatly simplifying the mechanical components of an electric vehicle. The hub motor is connected to the vehicle platform via a main shaft. When the hub motor drives the vehicle on the road, it generates bumps, requiring a high level of strength in the connection between the vehicle platform and the hub motor's main shaft. Therefore, a reliable and stable connector is needed for reinforcement. Utility Model Content

[0003] The purpose of this utility model is to provide an internal locking screw, which aims to solve the technical problem of high connection strength requirements between the vehicle platform and the hub motor spindle in the prior art.

[0004] To achieve the above objectives, this utility model provides an internal locking screw, including a spindle and a nut assembly. The spindle has a threaded portion at its top. The nut assembly includes a first body and a second body. The first body has an upwardly mounted cylinder. The top of the cylinder is integrally formed with an inverted trumpet-shaped expansion member. The expansion member includes a plurality of expansion plates and movable positions disposed between the expansion plates. The outer side of the cylinder and the outer side of each expansion plate are provided with a first thread. The inner side of the cylinder is provided with a second thread. The inner hole of the second body is connected to the first thread, and the second thread is connected to the threaded portion.

[0005] Preferably, a limiting platform is provided between the bottom of the threaded portion and the main shaft, and a washer is provided on the limiting platform, the washer abutting against the bottom of the first body.

[0006] Preferably, a movable part is provided between the top surface of the first main body and the bottom surface of the second main body, and a locking component is detachably connected within the movable part.

[0007] Preferably, the locking member has a sleeve hole in the middle for engaging with the cylinder, and one side of the sleeve hole has an outwardly communicating opening.

[0008] Preferably, the locking member has a silicone layer on both the upper and lower surfaces.

[0009] Preferably, the locking member has a handle extending outward on one side.

[0010] Preferably, the inner wall of the expansion plate is provided with a rubber pad.

[0011] Preferably, the inner side of the expansion piece is flush with the inner wall of the round tube, and the angle between the outer wall of the expansion piece and the vertical line is 2° to 5°.

[0012] The internal locking screw provided in this embodiment of the present invention has at least one of the following technical effects:

[0013] In use, the second thread on the inner side of the first body is threaded to the threaded part of the spindle. At this time, the surface of the spindle is embedded in the cylinder, and the top of the threaded part of the spindle is located inside the expansion member. By moving the second body and the first thread in a direction closer to the expansion member, the expansion member is pressed and fixed against the threaded part of the spindle to achieve a better locking effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the internal locking screw provided in an embodiment of the present utility model;

[0015] Figure 2 A cross-sectional view of the nut assembly of the internal locking screw provided in an embodiment of this utility model;

[0016] Figure 3 A schematic diagram of the expansion component of the internal locking screw provided in an embodiment of this utility model;

[0017] Figure 4 This is a schematic diagram of the locking mechanism of the internal locking screw provided in an embodiment of the present utility model.

[0018] The following are the labeling elements in the figure:

[0019] 1-Main shaft, 11-Threaded part, 12-Limiting platform, 121-Washer, 2-Nut assembly, 20-First body, 201-Cylinder, 202-Sleeve hole, 203-Opening, 21-Second body, 22-Expansion component, 221-Expansion plate, 223-Rubber pad, 23-First thread, 24-Second thread, 3-Locking component, 31-Silicone layer, 32-Handle. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0021] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and 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 this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0024] In one embodiment of this utility model, such as Figures 1-4 As shown, an internal locking screw is provided, including a spindle 1 and a nut assembly 2. The spindle 1 has a threaded portion 11 at its top. The nut assembly 2 includes a first body 20 and a second body 21. The first body 20 has an upwardly mounted cylinder 201. The top of the cylinder 201 is integrally formed with an inverted trumpet-shaped expansion member 22. The expansion member 22 includes a plurality of expansion plates 221 and a movable position disposed between each of the expansion plates 221. The outer side of the cylinder 201 and the outer side of each of the expansion plates 221 are provided with a first thread 23. The inner side of the cylinder 201 is provided with a second thread 24. The inner hole of the second body 21 is connected to the first thread 23, and the second thread 24 is connected to the threaded portion 11.

[0025] Furthermore, a limiting platform 12 is provided between the bottom of the threaded portion 11 and the main shaft 1, and a washer 121 is provided on the limiting platform 12. The washer 121 abuts against the bottom of the first body 20. Specifically, the washer 121 is fitted onto the threaded portion 11 of the main shaft 1 and allowed to fall onto the limiting platform 12. The second thread 24 on the inner side of the first body 20 is threadedly connected to the threaded portion 11 of the main shaft 1 until the first body 20 abuts against the washer 121, thereby achieving a better fastening effect between the first body 20 and the main shaft 1.

[0026] Furthermore, a movable position is provided between the top surface of the first main body 20 and the bottom surface of the second main body 21, and a locking member 3 is detachably connected within the movable position. The locking member 3 has a sleeve hole 202 in its middle for engaging with the cylinder 201, and an outwardly communicating opening 203 on one side of the sleeve hole 202. Both the upper and lower surfaces of the locking member 3 are provided with silicone layers 31. A handle 32 extends outward from one side of the locking member 3. Specifically, after the second thread 24 on the inner side of the first body 20 is threadedly connected to the threaded portion 11 of the main shaft 1, the second body 21 moves towards the expansion member 22 through the engagement of the first thread 23. During this process, the second body 21 moves within the movable position until the second body 21 can no longer penetrate further into the expansion member 22. At this time, a gap is formed between the second body 21 and the first body 20. The cylinder 201 is inserted into the sleeve hole 202 of the locking member 3 through the opening 203 of the locking member 3, so that the gap is filled between the supports. The silicone layer 31 provides elastic support between the first body 20 and the second body 21, thereby achieving the fixing effect between the first body 20 and the second body 21.

[0027] Furthermore, the inner wall of the expansion piece 221 is provided with a rubber pad 223. Specifically, when the second body 21 moves toward the expansion member 22 via the first thread 23, each expansion piece 221 bends and deforms toward the main shaft 1. By providing the rubber pad 223, the threaded part 11 of the main shaft 1 can engage with the rubber pad 223 when the expansion member 22 deforms, increasing friction and improving the fixing effect.

[0028] Furthermore, the inner side of the expansion piece 221 is flush with the inner wall of the round tube, and the angle between the outer wall of the expansion piece 221 and the vertical line is 2° to 5°.

[0029] Working principle: In use, the second thread 24 on the inner side of the first body 20 is threaded to the threaded part 11 of the main shaft 1. At this time, the surface of the main shaft 1 is embedded in the cylinder 201, and the top end of the threaded part 11 of the main shaft 1 is located inside the expansion member 22. By engaging the second body 21 with the first thread 23 and moving it closer to the expansion member 22, the expansion member 22 is pressed and fixed against the threaded part 11 of the main shaft 1 to achieve a better locking effect. During assembly, the second body 21 can be screwed into the cylinder 201 first, and then the bottom of the cylinder 201 can be welded to the first body 20 to achieve the assembly effect.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An internal locking screw, characterized in that: The device includes a spindle and a nut assembly. The spindle has a threaded portion at its top. The nut assembly includes a first body and a second body. The first body has an upwardly oriented cylinder. The top of the cylinder is integrally formed with an inverted trumpet-shaped expansion member. The expansion member includes a plurality of expansion plates and movable positions disposed between the expansion plates. The outer side of the cylinder and the outer side of each expansion plate are provided with a first thread. The inner side of the cylinder is provided with a second thread. The inner hole of the second body is connected to the first thread, and the second thread is connected to the threaded portion.

2. The internal locking screw according to claim 1, characterized in that: A limiting platform is provided between the bottom of the threaded part and the main shaft, and a washer is provided on the limiting platform. The washer abuts against the bottom of the first body.

3. The internal locking screw according to claim 1, characterized in that: A movable part is provided between the top surface of the first main body and the bottom surface of the second main body, and a locking component is detachably connected within the movable part.

4. The internal locking screw according to claim 3, characterized in that: The locking member has a sleeve hole in the middle for engaging with the cylinder, and one side of the sleeve hole has an outwardly communicating opening.

5. The internal locking screw according to claim 3, characterized in that: The locking component has a silicone layer on both its upper and lower surfaces.

6. The internal locking screw according to claim 3, characterized in that: The locking element has a handle extending outward from one side.

7. The internal locking screw according to claim 1, characterized in that: The inner wall of the expansion plate is provided with a rubber pad.

8. The internal locking screw according to claim 1, characterized in that: The inner side of the expansion plate is flush with the inner wall of the round tube, and the angle between the outer wall of the expansion plate and the vertical line is 2° to 5°.

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