Anti-loosening self-tapping screw

Abstract

This utility model discloses a self-tapping screw with anti-loosening features, including a screw body with a self-tapping head at one end and a rotating part at the other end. The screw body has an anti-loosening side hole extending radially left and right, and an outer shaft hole extending radially front and back. The outer shaft hole is connected to the anti-loosening side hole. An anti-loosening plate, which does not rotate in its natural state, is embedded in the anti-loosening side hole. An inner shaft hole is formed in the center of the anti-loosening plate, and a pin passing through the inner shaft hole is embedded in the outer shaft hole. The anti-loosening plate rotates relative to the pin. Above the anti-loosening plate is a driving hole formed on the screw body and extending axially. A guide notch is cut on the anti-loosening plate near the driving hole. The end of the guide notch facing the driving hole has a guide slope. The screw also includes a driving rod that can be inserted into the driving hole, the length of which is greater than the depth of the driving hole. This self-tapping screw has the characteristics of anti-loosening and anti-retraction, with complete overall functions and strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and more specifically, to an anti-loosening self-tapping screw. Background Technology

[0002] Self-tapping wood screws are easy to install, but their tightening ability is limited. If the connected objects are frequently in a non-static environment, the screws still risk loosening. Therefore, this invention proposes an anti-loosening self-tapping screw. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a self-tapping screw that prevents loosening and has the characteristics of preventing loosening.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: This utility model relates to a self-tapping screw with anti-loosening features, comprising a screw body having a self-tapping head at one end and a rotating part at the other end. The screw body has an anti-loosening side hole extending radially left and right, and an outer shaft hole extending radially front and back. The outer shaft hole is connected to the anti-loosening side hole. An anti-loosening plate that does not rotate in its natural state is embedded in the anti-loosening side hole. An inner shaft hole is formed at the center of the anti-loosening plate. A pin passing through the inner shaft hole is embedded in the outer shaft hole. The anti-loosening plate rotates relative to the pin. A driving hole extending axially on the screw body is provided above the anti-loosening plate. A guide notch is cut on the anti-loosening plate near the driving hole. The end of the guide notch facing the driving hole has a guide slope. The screw body also includes a driving rod that can be inserted into the driving hole, the length of which is greater than the depth of the driving hole.

[0005] The present invention is further configured such that: a first toothed portion is provided on one side of the high end of the guide slope, and the first toothed portion is located near the upper part of the anti-loosening plate; a second toothed portion is provided on one side of the low end of the guide slope, and the second toothed portion is located near the lower part of the anti-loosening plate.

[0006] The present invention is further configured such that the first meshing part and the second meshing part are arranged at an angle of 180° around the axis of the inner shaft hole.

[0007] The present invention is further configured such that the end of the drive rod facing the self-tapping head has a ball head.

[0008] The present invention is further configured such that the driving hole and the screw body are arranged on the same axis.

[0009] In summary, this utility model has the following beneficial effects: The anti-loosening self-tapping screw involved in this utility model, by driving a driving rod into the driving hole of the screw after it has been screwed in, pushes the guide notch on the anti-loosening plate, causing it to rotate until the meshing part extends out of the anti-loosening side hole, interferes with the connecting object, and forms a bite, thereby restricting the self-tapping screw from rotating in the opposite direction, achieving the effects of stopping and preventing loosening. The overall function is perfect and the practicality is strong. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a partial structural schematic diagram of the present invention;

[0012] Figure 3 This is a schematic diagram illustrating the structure of the anti-loosening sheet of this utility model;

[0013] Figure 4 This is a schematic diagram illustrating the structure of the drive rod in this utility model. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0015] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0016] Example 1

[0017] See Figures 1 to 4As shown, the anti-loosening self-tapping screw involved in this embodiment includes a screw body 3 with a self-tapping head 1 at one end and a rotating part 2 at the other end. The screw body 3 has an anti-loosening side hole 4 extending radially left and right and an outer shaft hole 5 extending radially front and back. The outer shaft hole 5 is connected to the anti-loosening side hole 4. An anti-loosening plate 6 that does not rotate in its natural state is embedded in the anti-loosening side hole 4. An inner shaft hole 7 is opened in the center of the anti-loosening plate 6. A pin 8 passing through the inner shaft hole is embedded in the outer shaft hole 5. The anti-loosening plate 6 rotates relative to the pin 8. A driving hole 9 is provided above the anti-loosening plate 6, which is opened on the screw body 3 and extends axially. A guide notch 10 is cut on the anti-loosening plate 6 near the driving hole. The end of the guide notch 10 facing the driving hole 9 has a guide slope (not marked). It also includes a driving rod 11 that can be inserted into the driving hole 9. The length of the driving rod 11 is greater than the depth of the driving hole 9.

[0018] Furthermore, the drive hole 9 is coaxial with the screw body 3.

[0019] In this implementation scheme, the self-tapping screw is first screwed into the target object, and then the drive rod 11 is driven into the drive hole 9 until the lower end of the drive rod 11 extends into the guide notch 10 and pushes the anti-loosening plate 6, causing the anti-loosening plate 6 to rotate until it extends out of the anti-loosening side hole 4 and interferes with the target object, so as to achieve the anti-loosening and stopping effect.

[0020] Example 2

[0021] See Figures 1 to 4 As shown, the anti-loosening self-tapping screw involved in this embodiment is further configured based on embodiment 1, wherein a first toothed portion 12 is provided on one side of the high end of the guide slope, and the first toothed portion 12 is located near the upper position of the anti-loosening plate 6; a second toothed portion 13 is provided on one side of the low end of the guide slope, and the second toothed portion 13 is located near the lower position of the anti-loosening plate 6.

[0022] Furthermore, the first toothed portion 12 and the second toothed portion 13 are arranged at an angle of 180° around the axis of the inner shaft hole 7.

[0023] In this embodiment, by providing a toothed part (including a first toothed part 12 and a second toothed part 13) on the part of the anti-loosening plate 6 that can extend out of the anti-loosening side hole 4 after rotation, the contact area can be reduced to increase the pressure, thereby achieving a better biting effect and a better stopping effect.

[0024] Example 3

[0025] See Figures 1 to 4 As shown, the anti-loosening self-tapping screw involved in this embodiment is further configured, based on embodiment 1, that the end of the drive rod 11 facing the self-tapping head 1 has a ball head 14.

[0026] In this embodiment, the ball head 14 is configured to serve as an insertion guide and a drive guide.

[0027] The self-tapping screw with anti-loosening mechanism of this utility model works by inserting a drive rod into the drive hole of the screw after it has been screwed in. The drive rod pushes the guide notch on the anti-loosening plate, causing it to rotate until the meshing part extends out of the anti-loosening side hole and interferes with the connecting object to form a bite, thereby restricting the self-tapping screw from rotating in the opposite direction and achieving the effects of preventing loosening and preventing it from turning back. The overall function is perfect and the practicality is strong.

[0028] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing 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, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0029] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model 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 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 utility model based on the specific circumstances.

[0030] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A self-tapping screw with anti-loosening properties, comprising a screw body having a self-tapping head at one end and a rotating part at the other end, characterized in that: The screw body has a locking side hole extending radially left and right, and an outer shaft hole extending radially front and back. The outer shaft hole is connected to the locking side hole. A locking plate that does not rotate in its natural state is embedded in the locking side hole. An inner shaft hole is opened in the center of the locking plate. A pin passing through the inner shaft hole is embedded in the outer shaft hole. The locking plate rotates relative to the pin. A drive hole is provided above the locking plate, which is opened on the screw body and extends axially. A guide notch is cut on the locking plate near the drive hole. The end of the guide notch facing the drive hole has a guide slope. It also includes a drive rod that can be inserted into the drive hole. The length of the drive rod is greater than the depth of the drive hole.

2. The anti-loosening self-tapping screw according to claim 1, characterized in that: A first toothed portion is provided on one side of the high end of the guide slope, and the first toothed portion is located near the upper part of the anti-loosening plate; a second toothed portion is provided on one side of the low end of the guide slope, and the second toothed portion is located near the lower part of the anti-loosening plate.

3. The anti-loosening self-tapping screw according to claim 2, characterized in that: The first and second meshing parts are arranged at an angle of 180° around the axis of the inner shaft hole.

4. The anti-loosening self-tapping screw according to any one of claims 1-3, characterized in that: The end of the drive rod facing the self-tapping head has a ball head.

5. The anti-loosening self-tapping screw according to claim 1, characterized in that: The drive hole is coaxial with the screw body.

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