Reverse double-thread self-locking screw

Abstract

The utility model relates to a reverse double-thread self-locking screw, and aims to solve the technical problem that the use cost of the screw is increased because the screw on one side cannot be locally replaced when the screw on one side is damaged because the conventional bidirectional thread screw is generally integrally formed, the reverse double-thread self-locking screw comprises a screw body, and a convenient structure is arranged in the middle of the screw body; the convenient structure comprises a rectangular groove, a clamping block is clamped in the rectangular groove, a circular groove is formed in the side of the rectangular groove, a movable rod is clamped in the circular groove, a movable block is connected to the end of the movable rod, a limiting groove is attached to the outer portion of the movable block in a matched mode, and a limiting block is clamped in the clamping block. The movable blocks are effectively made to translate by pressing the movable rods inwards, so that the limiting blocks are moved out of the limiting grooves, at the moment, the limiting blocks are completely clamped into the clamping blocks, the clamping blocks are not restrained, the clamping blocks can be conveniently and directly moved out of the rectangular grooves, and the convenient disassembly and assembly performance of the clamping blocks is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of self-locking screws, in particular to a reverse double-thread self-locking screw. Background Art

[0002] Self-locking screws are self-tapping screws that do not require nuts. When using this type of screw, there is no need to tap the hole, and it can be directly screwed into the drilled, punched or die-cast hole.

[0003] In addition to the commonly used one-way threaded screws, the existing self-locking screws also have more sophisticated two-way threaded screws. The two-way threaded screws can connect the left and right connecting parts, balance the torque on the left and right ends of the screw, and eliminate the hidden dangers caused by loosening and backing of the screw.

[0004] Existing bidirectional threaded screws are often formed in one piece, so when the screw on one side is damaged, it cannot be partially replaced, which increases the cost of using the screw. In view of this, we propose a reverse double-threaded self-locking screw. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, meet actual needs, and provide a reverse double-thread self-locking screw to solve the technical problem that the existing two-way thread screws are often formed in one piece, so when the screw on one side is damaged, it cannot be partially replaced, thereby increasing the cost of using the screw.

[0006] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing a reverse double-thread self-locking screw, including a screw body, and a convenient structure is provided in the middle of the screw body;

[0007] The convenient structure includes a rectangular groove, a clamping block is engaged inside the rectangular groove, a circular groove is opened on the side of the rectangular groove, a movable rod is engaged inside the circular groove, a movable block is connected to the end of the movable rod, the outside of the movable block matches and fits the limiting groove, the clamping block is engaged inside the limit block, a spring is connected to the surface of the limit block, and a fixing groove is opened outside the spring.

[0008] Preferably, the movable rod is in an inverted T shape, and the small-diameter end of the movable rod is fixedly connected to the movable block.

[0009] Preferably, the rectangular groove is communicated with the limiting groove, and the limiting block is matched and engaged in the limiting groove.

[0010] Preferably, the limiting block forms an elastic structure through a spring and a fixing groove, and the fixing groove and the clamping block are integrally formed.

[0011] Preferably, the screw body comprises a first screw, a first limiting portion is fixedly connected to an end portion of the first screw, a second screw is disposed on an opposite surface of the first screw, and a second limiting portion is disposed on an end portion of the second screw.

[0012] Preferably, the threaded portion of the first screw and the threaded portion of the second screw are in opposite directions, and the first screw and the second screw are of equal length.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model effectively moves the movable block inward by pressing the movable rod inward, thereby moving the limit block out of the limit groove. At this time, the limit block is completely inserted into the card block, and the card block is not constrained, which makes it easy to directly move the card block out of the rectangular groove, thereby improving the convenience of disassembly and assembly of the card block.

[0015] 2. In the utility model, the screw body is roughly divided into two parts, which changes the original one-piece structure of the screw, makes the screw body partially detachable, improves the practicality of the screw body, and reduces the replacement cost of the screw body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the disassembly structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the first limiting part of the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the card block of the utility model;

[0020] In the figure: 1. Screw body; 2. Convenient structure;

[0021] 101, first screw; 102, first limiting portion; 103, second screw; 104, second limiting portion;

[0022] 201, rectangular slot; 202, clamping block; 203, circular slot; 204, movable rod; 205, movable block; 206, limiting slot; 207, limiting block; 208, spring; 209, fixed slot. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0024] Reverse double thread self-locking screws, see Figures 1 to 4 , comprising a screw body 1, a convenient structure 2 is provided in the middle of the screw body 1;

[0025] The convenient structure 2 includes a rectangular groove 201, a card block 202 is engaged inside the rectangular groove 201, a circular groove 203 is opened on the side of the rectangular groove 201, a movable rod 204 is engaged inside the circular groove 203, and a movable block 205 is connected to the end of the movable rod 204, wherein the movable rod 204 is in an inverted T shape, the small diameter end of the movable rod 204 is fixedly connected to the movable block 205, the outer part of the movable block 205 is matched and fitted with the limiting groove 206, and the card block 202 is engaged with the limiting block 207. Further, the rectangular groove 201 is connected to the limiting groove 206, the limiting block 207 is matched and engaged with the inner part of the limiting groove 206, a spring 208 is connected to the surface of the limiting block 207, and a fixing groove 209 is opened on the outside of the spring 208. Further, the limiting block 207 forms an elastic structure through the spring 208 and the fixing groove 209, and the fixing groove 209 and the card block 202 are integrally formed. The utility model effectively moves the movable block 205 inward by pressing the movable rod 204, thereby moving the limit block 207 out of the limit groove 206. At this time, the limit block 207 is completely inserted into the clamping block 202, and the clamping block 202 is not constrained, which makes it easy to directly move the clamping block 202 out of the rectangular groove 201, thereby improving the convenience of disassembly and assembly of the clamping block 202, thereby facilitating partial disassembly of the screw body 1.

[0026] It is worth noting that the screw body 1 includes a first screw 101, a first stopper 102 is fixedly connected to the end of the first screw 101, a second screw 103 is provided on the opposite surface of the first screw 101, and a second stopper 104 is provided on the end of the second screw 103. It is worth noting that the threaded portion of the first screw 101 and the threaded portion of the second screw 103 are in opposite directions, and the first screw 101 and the second screw 103 are of equal length. In the utility model, the screw body 1 is roughly divided into two parts, which changes the original integrally formed structure of the screw, so that the screw body 1 is partially detachable, improves the practicality of the screw body 1, and reduces the replacement cost of the screw body 1.

[0027] Working principle: When it is necessary to partially replace the screw body 1, the movable block 205 is translated by pressing the movable rod 204 inward, thereby moving the limit block 207 out of the limit slot 206. At this time, the limit block 207 is completely stuck in the block 202, and the block 202 is not constrained. The block 202 can be directly moved out of the rectangular slot 201. At this time, the disassembled screw body 1 can be partially replaced. When the screw is reassembled, first press the limit block 207 inward to make it completely stuck in the block 202, and then align the block 202 with the rectangular slot 201 and insert it. When the limit block 207 is flush with the limit slot 206, the limit block 207 pops out and engages with the limit slot 206 under the influence of the rebound force of the spring 208, thereby realizing the assembly of the screw.

[0028] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. Reverse double thread self-locking screw, characterized in that: It comprises a screw body (1), wherein a convenient structure (2) is provided in the middle of the screw body (1); The convenient structure (2) comprises a rectangular groove (201), a clamping block (202) is clamped inside the rectangular groove (201), a circular groove (203) is provided on the side of the rectangular groove (201), a movable rod (204) is clamped inside the circular groove (203), a movable block (205) is connected to the end of the movable rod (204), the movable block (205) is matched and fitted with a limiting groove (206) on the outside, a limiting block (207) is clamped inside the clamping block (202), a spring (208) is connected to the surface of the limiting block (207), and a fixing groove (209) is provided on the outside of the spring (208).

2. The reverse double-thread self-locking screw according to claim 1, characterized in that: The movable rod (204) is in an inverted T shape, and the small-diameter end of the movable rod (204) is fixedly connected to the movable block (205).

3. The reverse double-thread self-locking screw according to claim 1, characterized in that: The rectangular groove (201) is communicated with the limiting groove (206), and the limiting block (207) is matched and engaged inside the limiting groove (206).

4. The reverse double-thread self-locking screw according to claim 1, characterized in that: The limiting block (207) forms an elastic structure through a spring (208) and a fixing groove (209), and the fixing groove (209) and the clamping block (202) are integrally formed.

5. The reverse double-thread self-locking screw according to claim 1, characterized in that: The screw body (1) comprises a first screw (101), the end of the first screw (101) being fixedly connected with a first limiting portion (102), a second screw (103) being arranged on an opposite surface of the first screw (101), and the end of the second screw (103) being provided with a second limiting portion (104).

6. The reverse double-thread self-locking screw according to claim 5, characterized in that: The threaded portion of the first screw (101) and the threaded portion of the second screw (103) are in opposite directions, and the first screw (101) and the second screw (103) are of equal length.

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