Anti-falling type bolt

Abstract

The utility model discloses an anti-drop bolt, which relates to the technical field of fasteners and comprises a fixing screw main body. A connecting cover is arranged on the outer edge of the upper end of the fixing screw body, a rotating sleeve is rotatably mounted on the surface of the inner wall of the connecting cover, a friction pad is arranged on the outer surface of the rotating sleeve and made of a rubber material, a first placement pad is arranged on the upper surface of the friction pad, and a limiting telescopic rod is arranged on the upper surface of the first placement pad. Compared with an existing common sleeving type anti-falling bolt, the anti-falling type bolt has the advantages that through the arrangement of the limiting telescopic rod, after the fixing screw main body is screwed with a connected workpiece, the friction pad can be driven to slide towards the interior of the connecting cover, so that the friction pad can be driven to slide towards the interior of the connecting cover; the spiral contact area of the fixing screw body is increased while the friction strength of the friction pad is guaranteed, fixing is firmer, and meanwhile the service life of the friction pad is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to an anti-loosening bolt. Background Technology

[0002] The assembly process of mechanical equipment, from parts to the whole machine, cannot be separated from the close fit of fasteners. Bolts are the most widely used type of fastener. During various stages of equipment transportation and operation, due to the influence of external forces such as vibration, the pressure between the interlocking threads of bolts can disappear instantly, resulting in zero friction between the threads. This can cause the threaded connection to loosen or even fall off, thus affecting the normal performance of the equipment and even causing it to malfunction.

[0003] For example, patent application number 202120021657.1 discloses a sleeve-type anti-loosening bolt. This utility model discloses a sleeve-type anti-loosening bolt, including a screw head, a mounting square hole, a block, a baffle, a through hole, a tension spring, a connecting rod, a screw rod, a slot, a nut, a first tooth tip, a limiting ring, an annular groove, a second tooth tip, a first magnetic ring, a second magnetic ring, and a block. The screw head has a mounting square hole at its center bottom. A block adapted to the cross-section of the mounting square hole is provided inside the mounting square hole. The block slides axially with the mounting square hole. A baffle is fixedly provided inside the lower end of the mounting square hole. A through hole is provided in the center of the block, and a tension spring is fixedly provided in the center of the upper part of the block, which is coaxial with the screw head. The upper end of the tension spring is fixedly connected to the upper end of the mounting hole. Compared with the prior art, this can significantly improve the bolt's anti-vibration and anti-loosening performance, improve the bolt's practicality and safety, and has a simple structure. It is easy to use and easy to promote and apply. However, when using a friction pad to increase the friction and vibration reduction effect between the bolts, the friction pad will be damaged when the screw is screwed into the workpiece. If the friction pad ages and is damaged, the bolt will loosen due to insufficient friction.

[0004] Therefore, in view of this, we studied and improved the existing structure to address its shortcomings and proposed an anti-loosening bolt. Utility Model Content

[0005] The purpose of this invention is to provide an anti-loosening bolt to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-loosening bolt, comprising a fixing screw body, a connecting cover provided on the outer edge of the upper end of the fixing screw body, and a rotating sleeve rotatably mounted on the inner wall surface of the connecting cover, a friction pad provided on the outer surface of the rotating sleeve, the friction pad being made of rubber material, a placement pad provided on the upper surface of the friction pad, a limiting telescopic rod provided on the upper surface of the placement pad, and a compression spring provided on the outer surface of the limiting telescopic rod.

[0007] Preferably, the upper surface of the limiting telescopic rod is provided with a second placement pad, and the second placement pad and the connecting cover are configured to be in contact connection.

[0008] Preferably, a connecting nut is provided on the outer surface of the fixing screw body, and the connecting nut and the fixing screw body are connected by a screw thread.

[0009] Preferably, a threaded rod is helically installed on the lower surface of the fixing screw body, and a second connecting nut is provided on the lower surface of the threaded rod, and the second connecting nut and the first connecting nut are configured for friction connection.

[0010] Preferably, a shock-absorbing pad is provided at the connection between the second connecting nut and the first connecting nut, and the surface of the shock-absorbing pad has an opening.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model, through the setting of a fixed screw body, a connecting cover, a rotating sleeve, a friction pad, a first placement pad, a limiting telescopic rod, a compression spring, and a second placement pad, allows the friction pad to slide into the connecting cover after the fixed screw body is screwed into the connected workpiece. This ensures the friction strength of the friction pad while increasing the helical contact area of ​​the fixed screw body, making the fixation more secure and extending the service life of the friction pad.

[0013] 2. This utility model, through the setting of connecting nut one, shock-absorbing pad, threaded rod and connecting nut two, by setting connecting nut one, can improve the anti-loosening effect of bolt by spirally installing connecting nut two below the main body of the fixing screw so that it rubs against connecting nut one. At the same time, the double spiral connection can prevent the bolt from loosening due to stripping of connecting nut two due to vibration or other reasons. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the friction pad of this utility model;

[0016] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0017] Figure 4 This is a three-dimensional structural diagram of the fixing screw body of this utility model.

[0018] In the diagram: 1. Fixed screw body; 2. Connecting cover; 201. Rotating sleeve; 202. Friction pad; 203. Placement pad one; 204. Limiting telescopic rod; 205. Compression spring; 206. Placement pad two; 3. Connecting nut one; 301. Shock-absorbing pad; 302. Threaded rod; 303. Connecting nut two. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1-3 As shown, an anti-loosening bolt includes a connecting cover 2 provided on the outer side of the upper end of the fixing screw body 1, and a rotating sleeve 201 rotatably installed on the inner wall surface of the connecting cover 2. A friction pad 202 is provided on the outer surface of the rotating sleeve 201, and the friction pad 202 is made of rubber material. The advantage of this setting is that by setting the rotating sleeve 201, the limiting telescopic rod 204 can be prevented from jamming by rotation.

[0021] Furthermore, a placement pad 203 is provided on the upper surface of the friction pad 202, and a limiting telescopic rod 204 is provided on the upper surface of the placement pad 203. A compression spring 205 is provided on the outer surface of the limiting telescopic rod 204. The advantage of this arrangement is that the friction pad 202 can be supported by the reset characteristic through the setting of the compression spring 205.

[0022] Furthermore, a second placement pad 206 is provided on the upper surface of the limiting telescopic rod 204, and the second placement pad 206 is connected to the connecting cover 2 in contact. The advantage of this setting is that, by setting the limiting telescopic rod 204, after the fixing screw body 1 is screwed with the connected workpiece, the friction pad 202 can be slid into the interior of the connecting cover 2 to ensure the friction strength of the friction pad 202, while increasing the helical contact area of ​​the fixing screw body 1, making the fixation more secure, and at the same time increasing the service life of the friction pad 202.

[0023] like Figure 4As shown, a connecting nut 3 is provided on the outer surface of the fixing screw body 1, and the connecting nut 3 is connected to the fixing screw body 1 by a screw. A threaded rod 302 is screwed on the lower surface of the fixing screw body 1, and a connecting nut 303 is provided on the lower surface of the threaded rod 302. The connecting nut 303 and the connecting nut 3 are connected by friction. The advantage of this setting is that by setting the connecting nut 3, the bolt anti-loosening effect can be improved by screwing a connecting nut 303 under the fixing screw body 1 to make it rub against the connecting nut 3. At the same time, the double screw connection can prevent the connecting nut 303 from stripping due to vibration and other reasons, which would cause the bolt to loosen.

[0024] Furthermore, a shock-absorbing pad 301 is provided at the connection between the second connecting nut 303 and the first connecting nut 3, and the surface of the shock-absorbing pad 301 is provided with a notch. The advantage of this setting is that by setting the shock-absorbing pad 301, the friction between the second connecting nut 303 and the first connecting nut 3 can be increased while facilitating installation.

[0025] Working principle: When using this anti-loosening bolt, firstly, after inserting the fixing screw body 1 into the workpiece to be connected, rotate the fixing screw body 1 to make the friction pad 202 on the lower surface of the connecting cover 2 contact and rub against the workpiece. Simultaneously, continue rotating the fixing screw body 1 through the connecting cover 2 to allow the friction pad 202 to enter the inner surface of the connecting cover 2 via the limiting telescopic rod 204, increasing the screw-in length of the fixing screw body 1 until the installation of the fixing screw body 1 is complete. After completing the installation of the fixing screw body 1, screw in the connecting nut 3 for the first fixing. Then, insert a shock-absorbing pad 301 into the outer surface of the fixing screw body 1 to adhere to the lower surface of the connecting nut 3. Finally, screw in a threaded rod 302 to rub and fix the connecting nut 303 against the connecting nut 3. This is the working principle of the anti-loosening bolt.

Claims

1. A type of anti-loosening bolt, comprising a fixing screw body (1), characterized in that, A connecting cover (2) is provided on the outer side of the upper end of the fixed screw body (1), and a rotating sleeve (201) is rotatably installed on the inner wall surface of the connecting cover (2). A friction pad (202) is provided on the outer surface of the rotating sleeve (201), and the friction pad (202) is made of rubber material. A placement pad (203) is provided on the upper surface of the friction pad (202), and a limit telescopic rod (204) is provided on the upper surface of the placement pad (203), and a compression spring (205) is provided on the outer surface of the limit telescopic rod (204).

2. The anti-loosening bolt according to claim 1, characterized in that, The upper surface of the limiting telescopic rod (204) is provided with a placement pad two (206), and the placement pad two (206) and the connecting cover (2) are configured to be in contact connection.

3. The anti-loosening bolt according to claim 1, characterized in that, The outer surface of the fixed screw body (1) is provided with a connecting nut (3), and the connecting nut (3) and the fixed screw body (1) are connected by a screw.

4. The anti-loosening bolt according to claim 1, characterized in that, The lower surface of the fixed screw body (1) is screwed with a threaded rod (302), and the lower surface of the threaded rod (302) is provided with a connecting nut two (303), and the connecting nut two (303) and the connecting nut one (3) are configured to be frictionally connected.

5. The anti-loosening bolt according to claim 4, characterized in that, A shock-absorbing pad (301) is provided at the connection between the second connecting nut (303) and the first connecting nut (3), and the surface of the shock-absorbing pad (301) is provided with a notch.

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