Anti-loosening screw rod

Abstract

The utility model discloses an anti-loosing screw which comprises a screw body and a nut, an anti-loosing groove is axially formed in the screw body, an anti-loosing rack is arranged in the anti-loosing groove, one-way helical teeth are arranged on the anti-loosing rack, a flange gasket is rotatably installed on the side face of the nut, an anti-loosing mechanism is arranged on the flange gasket, and the anti-loosing mechanism is arranged on the anti-loosing groove. And the anti-loosening mechanism comprises a containing groove, a cam, a pawl and a spring, the containing groove is formed in the inner side of the flange gasket, the cam is rotationally installed in the containing groove, the pawl is arranged on the cam, the pawl and the anti-loosening rack are installed in a matched mode, and the side face of the cam abuts against the spring. The pawls are arranged on the anti-loosening rack and the flange gasket of the nut, so that the nut can be installed on the screw in a one-way mode, the anti-loosening rack is locked through the pawls after installation is completed, the nut cannot return, and the good anti-loosening effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of screw rods. Background Art

[0002] The screw is a rod with threads, which is fastened by a nut during installation and has a wide range of uses. After the existing screw and nut threads are installed, due to frequent vibration, the nut is easy to withdraw from the screw thread, causing the connection to loosen, affecting the tightness of the installation. Utility Model Content

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide an anti-loosening screw that can solve the above problems.

[0004] To achieve the above-mentioned purpose, the utility model proposes an anti-loosening screw, including a screw body and a nut, an anti-loosening groove is axially opened on the screw body, an anti-loosening rack is provided in the anti-loosening groove, the anti-loosening rack is provided with one-way bevel teeth, a flange gasket is rotatably installed on the side of the nut, an anti-loosening mechanism is provided on the flange gasket, the anti-loosening mechanism includes a receiving groove, a cam, a pawl and a spring, an receiving groove is opened on the inner side of the flange gasket, a cam is rotatably installed in the receiving groove, a pawl is provided on the cam, the pawl is matched with the anti-loosening rack, and a spring is abutted on the side of the cam.

[0005] Preferably, a movable bracket is installed in the accommodating groove, the cam is rotatably installed in the movable bracket, an adjusting column is rotatably installed on the movable bracket, an adjusting groove is radially penetrated on the nut, the adjusting groove is connected with the accommodating groove, the adjusting column is movably installed in the adjusting groove, and a threaded column is provided at one end of the adjusting column away from the cam, and the threaded column is threadedly installed with the adjusting groove.

[0006] Preferably, a screwdriver slot is provided at one end of the threaded column away from the cam.

[0007] Preferably, one end of the spring abuts against the side surface of the cam, and the other end is connected to a fixing column. A fixing groove is provided on the nut, and the fixing groove is threadedly mounted on the fixing column.

[0008] Preferably, two anti-loosening grooves are provided, and the two anti-loosening grooves are symmetrically arranged on both sides of the screw body, and an anti-loosening mechanism is correspondingly arranged for each anti-loosening groove.

[0009] The beneficial effects of the utility model are as follows: the utility model provides a pawl on the flange gasket of the nut through the anti-loosening rack, so that the nut can be installed on the screw rod in one direction; after the installation is completed, the anti-loosening rack is locked by the pawl, so that the nut cannot retreat, thereby playing a good anti-loosening effect.

[0010] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 yes Figure 1 A partial enlarged view of

[0013] Figure 3 It is a schematic diagram of the nut structure of the utility model.

[0014] In the figure: 1-screw body; 2-nut; 3-anti-loosening groove; 4-anti-loosening rack; 5-flange gasket; 6-accommodating groove; 7-cam; 8-pawl; 9-spring; 10-movable bracket; 11-adjusting column; 12-threaded column; 13-fixed column; 21-adjusting groove. DETAILED DESCRIPTION

[0015] Example 1

[0016] See also Figure 1 , Figure 2 , an anti-loosening screw comprises a screw body 1 and a nut 2, an anti-loosening groove 3 is axially opened on the screw body 1, an anti-loosening rack 4 is arranged in the anti-loosening groove 3, and the anti-loosening rack 4 is provided with unidirectional helical teeth, a flange gasket 5 is rotatably installed on the side of the nut 2, and an anti-loosening mechanism is arranged on the flange gasket 5, and the anti-loosening mechanism comprises a receiving groove 6, a cam 7, a pawl 8 and a spring 9, an receiving groove 6 is opened on the inner side of the flange gasket 5, a cam 7 is rotatably installed in the receiving groove 6, a pawl 8 is arranged on the cam 7, the pawl 8 is matched with the anti-loosening rack 4, and a spring 9 is abutted on the side of the cam 7.

[0017] Example 2

[0018] See also Figure 3, an anti-loosening screw comprises a screw body 1 and a nut 2, an anti-loosening groove 3 is axially opened on the screw body 1, an anti-loosening rack 4 is arranged in the anti-loosening groove 3, and the anti-loosening rack 4 is provided with unidirectional helical teeth, a flange gasket 5 is rotatably installed on the side of the nut 2, and an anti-loosening mechanism is arranged on the flange gasket 5, and the anti-loosening mechanism comprises a receiving groove 6, a cam 7, a pawl 8 and a spring 9, an receiving groove 6 is opened on the inner side of the flange gasket 5, a cam 7 is rotatably installed in the receiving groove 6, a pawl 8 is arranged on the cam 7, and the pawl 8 is matched with the anti-loosening rack 4, a spring 9 is abutted on the side of the cam 7, and a movable bracket 10 is installed in the receiving groove 6 The cam 7 is rotatably mounted in the movable bracket 10, and an adjusting column 11 is rotatably mounted on the movable bracket 10. An adjusting groove 21 is radially penetrated on the nut 2, and the adjusting groove 21 is communicated with the accommodating groove 6. The adjusting column 11 is movably mounted in the adjusting groove 21. A threaded column 12 is provided at one end of the adjusting column 11 away from the cam 7, and the threaded column 12 is threadedly mounted on the adjusting groove 21. A screwdriver groove is provided at one end of the threaded column 12 away from the cam 7. One end of the spring 9 abuts against the side of the cam 7, and the other end is connected to a fixing column 13. A fixing groove is provided on the nut 2, and the fixing groove is threadedly mounted on the fixing column 13.

[0019] The locking state can be released by turning the adjustment column, making it easier to remove the nut.

[0020] In order to improve the anti-loosening performance, the number of anti-loosening grooves 3 can be two, and the two anti-loosening grooves 3 are symmetrically arranged on both sides of the screw body 1, and each anti-loosening groove 3 is correspondingly provided with an anti-loosening mechanism.

[0021] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A locking screw, characterized in that: The invention comprises a screw body (1) and a nut (2), wherein an anti-loosening groove (3) is axially provided on the screw body (1), an anti-loosening rack (4) is provided in the anti-loosening groove (3), and the anti-loosening rack (4) is provided with unidirectional helical teeth, a flange washer (5) is rotatably mounted on the side of the nut (2), and an anti-loosening mechanism is provided on the flange washer (5), and the anti-loosening mechanism comprises a receiving groove (6), a cam (7), a pawl (8) and a spring (9), an receiving groove (6) is provided on the inner side of the flange washer (5), a cam (7) is rotatably mounted in the receiving groove (6), a pawl (8) is provided on the cam (7), and the pawl (8) is matched with the anti-loosening rack (4), and a spring (9) is abutted against the side of the cam (7).

2. The anti-loosening screw according to claim 1, characterized in that: A movable bracket (10) is installed in the receiving groove (6), the cam (7) is rotatably installed in the movable bracket (10), an adjusting column (11) is rotatably installed on the movable bracket (10), an adjusting groove (21) is radially penetrated on the nut (2), the adjusting groove (21) is connected to the receiving groove (6), the adjusting column (11) is movably installed in the adjusting groove (21), and a threaded column (12) is provided at one end of the adjusting column (11) away from the cam (7), and the threaded column (12) is threadedly installed with the adjusting groove (21).

3. The anti-loosening screw according to claim 2, characterized in that: A screwdriver slot is formed at one end of the threaded column (12) away from the cam (7).

4. The anti-loosening screw according to claim 1, characterized in that: One end of the spring (9) abuts against the side surface of the cam (7), and the other end is connected to a fixing column (13). A fixing groove is provided on the nut (2), and the fixing groove and the fixing column (13) are threadedly mounted.

5. The anti-loosening screw according to claim 1, characterized in that: The anti-loosening grooves (3) are provided with two, and the two anti-loosening grooves (3) are symmetrically arranged on both sides of the screw body (1), and each anti-loosening groove (3) is correspondingly provided with an anti-loosening mechanism.

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