Anti-reverse fastener
By setting up anti-reversal grooves and nut fixing through holes on the screw, combined with the fixing component, the fastening failure problem caused by the reversal of the bolt fastener is solved, and the anti-reversal effect in a limited space is achieved.
Patent Information
- Application Number
- CN202422710732.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-06
AI Technical Summary
Existing bolt fasteners are prone to reverse under factors such as vibration, resulting in fastening failure. The prior art measures such as adding gaskets or multiple nuts cannot effectively prevent reversal in some cases.
Anti-reversal screws and nuts are designed. Anti-reversal grooves are provided on the screws and fixed through holes are provided on the nuts. The fixing components are combined with the grooves to prevent the nut from being reversed.
It realizes effective prevention of nut reversal in a limited space, maintains tightening effect, and is simple in structure and easy to install and maintain.
Smart Images
Figure CN223306112U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fasteners, and particularly relates to an anti-reversal fastener. Background Art
[0002] Bolts are threaded fasteners that tighten or loosen components by rotating a nut on a threaded rod. However, after tightening, current bolts can cause the nut to rotate relative to the bolt to a certain degree due to factors such as vibration, thus losing its tightness.
[0003] One current method for mitigating or preventing fastener failure due to rotational rotation in bolt-type fasteners is to insert an elastic washer between the nut and the screw head. After tightening, the elasticity of the washer increases the friction between the nut and the threads, thereby extending the effective tightening time. Another method is to screw two nuts onto the screw to prevent fastener failure due to rotational rotation. However, adding a washer in existing technologies still fails to address fastener rotation, and in some cases, adding a nut is limited by the length of the screw. Utility Model Content
[0004] The purpose of the utility model is to provide an anti-reversal fastener to solve the problem that the current bolt fasteners are reversed, resulting in fastening failure and that multiple nuts cannot be installed on the bolt for fastening in some scenarios.
[0005] In order to solve the above problems, the utility model provides an anti-reverse fastener; it includes an anti-reverse screw, an anti-reverse nut and a fixing assembly, wherein the anti-reverse screw is provided with an external thread, and the anti-reverse screw is provided with a plurality of anti-reverse grooves along the axial direction.
[0006] A plurality of nut fixing through holes are provided on the side of the anti-reversal nut, and one end of the fixing component can pass through the nut fixing through hole. When the nut fixing through hole is above the anti-reversal groove, the end of the fixing component passing through the nut fixing through hole contacts a surface of the anti-reversal groove.
[0007] Furthermore, the anti-reversal groove is provided with a first groove surface and a second groove surface. The length direction of the first groove surface is parallel to the axis direction of the anti-reversal screw, and the angle between the first groove surface and the second groove surface does not exceed 90°.
[0008] Furthermore, an even number of anti-reverse grooves are provided on the anti-reverse screw.
[0009] Furthermore, one end of the anti-reverse screw is the screw tail, and one end of the anti-reverse screw away from the screw tail is fixedly connected to the bolt head, and the anti-reverse groove extends from the screw tail to the bolt head.
[0010] Furthermore, the height of the second groove surface is not lower than the height of the thread.
[0011] Furthermore, the number of the nut fixing through holes provided on the side surface of the anti-reverse nut is an even number.
[0012] Furthermore, the nut fixing through holes provided on two opposite surfaces of the side surface of the anti-reversal nut are located on the same horizontal plane.
[0013] Furthermore, the nut fixing through holes formed on two opposite surfaces of the side surface of the anti-reversal nut are located on different horizontal planes.
[0014] Furthermore, the fixing assembly is detachably connected to the anti-reversal nut, and the fixing assembly has two fixing ends, which can pass through the nut fixing through hole.
[0015] The beneficial effect of the anti-reversal fastener provided by the utility model is that, compared with the prior art, due to the design of the anti-reversal groove, the nut fixing through hole and the fixing assembly, the nut can be rotated into place normally during the process of screwing the nut in the forward direction. When it is rotated to the fastening position, due to the fixing assembly installed on the nut, the fixing assembly will be stuck in the anti-reversal groove to prevent the nut from being reversed and screwed out. The anti-reversal fastener not only achieves the purpose of anti-reversal, but also only uses one nut, so that it can work normally in some limited spaces. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of an anti-reverse screw of an anti-reverse fastener;
[0017] Figure 2 A schematic diagram of an anti-reverse nut and a fixing assembly of an anti-reverse fastener. DETAILED DESCRIPTION
[0018] In order to better understand the purpose, structure and function of this utility model, Figures 1 to 2 , an anti-reverse fastener of the utility model is further described in detail.
[0019] like Figure 1 and Figure 2 As shown, an anti-reverse fastener according to an embodiment of the present invention includes an anti-reverse screw 100, an anti-reverse nut 200, and a fixing assembly 300. During use, the anti-reverse nut 200 is rotatably and detachably connected to the anti-reverse screw 100. Both sides of the anti-reverse nut 200 with a screw hole can be screwed into the anti-reverse screw 100. The anti-reverse screw 100 is provided with an external thread, and one end of the anti-reverse screw 100 is a screw tail 120. The end of the anti-reverse screw 100 away from the screw tail 120 is provided with a bolt head 130, and the anti-reverse screw 100 is fixedly connected to the bolt head 130.
[0020] In the present invention, the direction in which the anti-reverse nut 200 rotates toward the bolt head 130 is forward rotation, and the direction in which the anti-reverse nut 200 rotates toward the screw tail 120 is reverse rotation.
[0021] It is understandable that the fixing assembly 300 can be installed before the anti-reverse nut 200 is screwed into the anti-reverse screw 100, or the fixing assembly 300 can be installed after the anti-reverse nut 200 has been installed in place to tighten the components.
[0022] In one embodiment, only one nut fixing through hole 210 is provided on the side of the anti-reversal nut 200. In this embodiment, the fixing assembly 300 can be designed into a straight line shape, and the fixing end 310 of either end of the fixing assembly 300 is inserted into the nut fixing through hole 210. When the nut fixing through hole 210 is rotated to above the anti-reversal groove 140 and the fixed end 310 falls into the anti-reversal groove 140, the anti-reversal fastener can realize the anti-reversal function of the bolt.
[0023] In one embodiment, an even number of nut fixing through holes 210 are provided on the side of the anti-reversal nut 200, with one nut fixing through hole 210 provided on each side, and the side of the nut usually has 6 planes. In this case, the number of nut fixing through holes 210 can be 2, 4 or 6. At this time, the fixing assembly 300 is designed to be C-shaped, and the fixing assembly 300 has two fixed ends 310. During use, the two fixed ends 310 are inserted into the nut fixing through holes 210 on the two opposite sides of the anti-reversal nut 200. When the nut fixing through hole 210 is rotated to above the anti-reversal groove 140 and the fixed end 310 falls into the anti-reversal groove 140, the anti-reversal fastener can prevent the anti-reversal nut 200 from reversing. As for the setting position of the nut fixing through hole 210, on a plane side, the position is not restricted. For convenience, it can be close to the middle of the side. However, to facilitate installation of the fixing assembly 300, the nut fixing holes 210 on two opposing sides are arranged at the same height, i.e., on a plane parallel to the screw holes. However, the nut fixing holes 210 on two adjacent sides are arranged at a height difference and are not arranged on a plane parallel to the screw holes. This height difference design prevents the anti-reversal nut 200 from having multiple nut fixing holes 210 on the same plane, which would reduce its strength.
[0024] After the fixing assembly 300 is installed on the anti-reverse nut 200, the fixing end 310 passes through the anti-reverse nut 200 through the nut fixing through-hole 210. The fixing end 310 contacts the thread on the anti-reverse screw 100. At this time, the anti-reverse nut 200 can rotate forward or reverse. When the nut fixing through-hole 210 rotates to the top of the anti-reverse groove 140, it contacts the first groove surface 141. At this time, if the anti-reverse nut 200 continues to rotate forward, the fixing end 310 will slide on the first groove surface 141, and then slide onto the thread outside the anti-reverse groove 140, so that the anti-reverse nut 200 continues to rotate forward. If reverse rotation is required, the fixing end 310 slides on the first groove surface 141 to the second groove surface 142. The second groove surface 142 will prevent the fixing end 310 from sliding out of the second groove surface 142 and entering the thread, thereby achieving the anti-reverse function. The length direction of the first groove surface 141 is parallel to the axial direction of the anti-reverse screw 100, and the angle between the first groove surface 141 and the second groove surface 142 does not exceed 90°. Therefore, when the anti-reverse nut 200 is reversed, the fixed end 310 will not slide onto the thread outside the anti-reverse groove 140 due to the obstruction of the second groove surface 142.
[0025] In the present invention, the height of the second groove surface 142 is not lower than the height of the thread. This design can prevent the fixing end 310 from damaging the thread when the second groove surface 142 blocks the fixing end 310 because the anti-reversal groove 140 is too shallow.
[0026] To improve the accuracy of preventing reverse rotation and enable the anti-reverse nut 200 to prevent reverse rotation in a variety of application scenarios, multiple anti-reverse grooves 140 can be provided on the bolt shank 110. If, during tightening, the fixed end 310 is located on the thread or only contacts the first groove surface 142, a thin shim can be added between the anti-reverse nut 200 and the bolt head 130 to adjust the fixing end 310 so that, during tightening, the fixing end 310 contacts both second groove surfaces 142, thereby preventing the anti-reverse nut 200 from reversing.
[0027] In some environments, multiple fixing components 300 can be installed. If the fixing component 300 breaks due to environmental factors such as vibration, the broken fixing component 300 can be replaced. Since multiple fixing components 300 are set, even if one of the fixing components 300 breaks, it will not affect the fastening of the entire anti-reversal fastener.
[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.
Claims
1. An anti-reverse fastener; characterized in that, The invention comprises an anti-reverse screw (100), an anti-reverse nut (200) and a fixing assembly (300), wherein the anti-reverse screw (100) is provided with an external thread, and the anti-reverse screw (100) is provided with a plurality of anti-reverse grooves (140) along the axial direction; A plurality of nut fixing through holes (210) are provided on the side surface of the anti-reversal nut (200), and one end of the fixing component (300) can pass through the nut fixing through hole (210). When the nut fixing through hole (210) is above the anti-reversal groove (140), the end of the fixing component (300) passing through the nut fixing through hole (210) contacts a surface of the anti-reversal groove (140).
2. The anti-reverse fastener according to claim 1, characterized in that: The anti-reversal groove (140) is provided with two surfaces, a first groove surface (141) and a second groove surface (142); the length direction of the first groove surface (141) is parallel to the axial direction of the anti-reversal screw (100); and the angle between the first groove surface (141) and the second groove surface (142) does not exceed 90°.
3. The anti-reverse fastener according to claim 2, characterized in that: An even number of anti-reverse grooves (140) are provided on the anti-reverse screw (100).
4. The anti-reverse fastener according to claim 2, characterized in that: One end of the anti-reverse screw (100) is the screw tail (120), and the end of the anti-reverse screw (100) away from the screw tail (120) is fixedly connected to the bolt head (130), and the anti-reverse groove (140) extends from the screw tail (120) to the bolt head (130).
5. The anti-reverse fastener according to claim 2, characterized in that: The height of the second groove surface (142) is not lower than the height of the thread.
6. The anti-reverse fastener according to claim 1, characterized in that: The number of the nut fixing through holes (210) opened on the side surface of the anti-reversal nut (200) is an even number.
7. The anti-reverse fastener according to claim 6, characterized in that: The nut fixing through holes (210) provided on two opposite surfaces on the side of the anti-reversal nut (200) are located on the same horizontal plane.
8. The anti-reverse fastener according to claim 6, characterized in that: The nut fixing through holes (210) opened on two opposite surfaces on the side of the anti-reversal nut (200) are located on different horizontal planes.
9. The anti-reverse fastener according to claim 8, characterized in that: The fixing assembly (300) is detachably connected to the anti-reversal nut (200), and the fixing assembly (300) has two fixing ends (310), and the fixing ends (310) can pass through the nut fixing through hole (210).