Structure for eliminating screw-thread fit clearance

Abstract

The structure for eliminating the thread fit clearance comprises a nut and a stud, the nut is provided with a threaded hole penetrating through the left end and the right end of the nut, internal threads are machined in the threaded hole, external threads are arranged on the stud and matched with the internal threads to form a thread pair, and a limiting groove coaxial with an inner hole of the threaded hole is formed in the threaded hole. An elastic sealing ring is installed in the limiting groove, and when the stud and the threaded hole are installed, external threads of the stud make extrusion contact with the elastic sealing ring. According to the structure for eliminating the thread fit clearance, the groove structure is additionally arranged in the nut and used for containing the elastic sealing ring, the stud can make contact with the elastic sealing ring in the 360-degree direction during transmission movement, the contact part of the stud and the elastic sealing ring has the damping effect when the stud is screwed, and therefore the sealing effect is improved. The soft and elastic characteristics of the elastic sealing ring are utilized to eliminate the thread clearance between the nut and the stud which are matched, sound generated by hard friction is eliminated, meanwhile, the anti-loosening effect between the nut and the stud is achieved, the adjusting precision of the thread is ensured, and the service life of the nut and the service life of the stud are prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical parts technical field, concretely is a structure of eliminating thread cooperation gap. BACKGROUND

[0002] On some photographic equipment, unmanned aerial vehicle, stabilizer and other equipment, will involve the need for horizontal or displacement adjustment, and these adjustment mechanisms basically adopt thread for height or stroke adjustment, the existing thread cooperation is used for compacting or transmission and will lead to gap due to thread standard and processing error, and when frequently used, will produce harsh noise and looseness when vibrating stress, lead to the reduction of adjustment accuracy, and then will influence the normal debugging use of equipment. SUMMARY

[0003] The utility model discloses a structure of eliminating thread cooperation gap to solve the technical problem in the background art.

[0004] To achieve the foregoing object, the utility model provides the following technical scheme:

[0005] A structure of eliminating thread cooperation gap, including nut and stud, the nut is equipped with the threaded hole through its left and right ends, the internal thread is processed in the threaded hole, the stud is equipped with the external thread and is matched with the internal thread and is formed into the thread pair, the limiting slot with the same axis as the inner hole of the threaded hole is set up in the threaded hole, the elastic sealing ring is installed in the limiting slot, the external thread of the stud is extruded contact with the elastic sealing ring when installing.

[0006] The longitudinal section of the limiting slot is rectangular structure, and the elastic gap exists between the inner side wall of the limiting slot and the outer side wall of the elastic sealing ring.

[0007] The left and right ends of the threaded hole are respectively equipped with the first guide surface and the second guide surface, and the axis of the first guide surface and the second guide surface overlaps with the axis of the threaded hole.

[0008] The elastic sealing ring is made of rubber or silica gel material.

[0009] Compared with the prior art, the structure of eliminating thread cooperation gap of the utility model, through the groove structure in the nut is used to place the elastic sealing ring, the stud is contacted with the elastic sealing ring in 360 ° orientation when transmission movement, the contact part of the stud and the elastic sealing ring has the damping effect when screwing, the thread gap of the nut and the stud is eliminated by the softness and elastic property of the elastic sealing ring, the sound produced by the hard friction is eliminated, the anti-loose effect between the nut and the stud is achieved, the adjustment accuracy of the thread is ensured, and the service life of the nut and the stud is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 : overall sectional structure diagram of the present application;

[0011] Figure 2 : sectional structure diagram of the nut. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application.

[0013] Specific embodiment 1: please refer to Figure 1 and Figure 2 In the embodiments of the present application, a structure for eliminating the gap between the threads of a nut and a stud comprises a nut 1 and a stud 2. The nut 1 is provided with a threaded hole 101 extending through the left and right ends thereof. An internal thread 102 is formed in the threaded hole 101. The stud 2 is provided with an external thread 201 which cooperates with the internal thread 102 to form a threaded pair. A limiting groove 103 is formed in the threaded hole 101 and has the same axis as the internal hole of the threaded hole 101. In this embodiment, the limiting groove 103 is located at the center of the threaded hole 101.

[0014] An elastic sealing ring 3 is installed in the limiting groove 103. The elastic sealing ring 3 is made of rubber or silicone. In this embodiment, the elastic sealing ring 3 is made of rubber.

[0015] When the stud 2 is installed in the threaded hole 101, the external thread 201 of the stud 2 is in extrusion contact with the elastic sealing ring 3. The longitudinal section of the limiting groove 103 has a rectangular structure. An elastic gap A exists between the inner side wall of the limiting groove 103 and the outer side wall of the elastic sealing ring 3. The elastic gap A allows the elastic sealing ring 3 to be elastically deformed in the limiting groove 103 so as to completely fill the limiting groove 103, thereby effectively improving the stability of the installation of the elastic sealing ring 3 in the limiting groove 103.

[0016] A first guide surface 101-1 and a second guide surface 101-2 are respectively arranged at the opening positions of the left and right ends of the threaded hole 101. The axes of the first guide surface 101-1 and the second guide surface 101-2 overlap with the axis of the threaded hole 101.

[0017] Compared with the prior art, the structure for eliminating the gap between the threads of a nut and a stud of the present application is provided with a groove structure inside the nut for placing an elastic sealing ring. When the stud is in transmission motion, the 360° orientation of the stud will contact the elastic sealing ring. The contact part of the elastic sealing ring has a damping effect when the stud is screwed. The softness and elastic properties of the elastic sealing ring are used to eliminate the gap between the threads of the nut and the stud, eliminate the sound generated by hard friction, and achieve the anti-loose effect between the nut and the stud, thereby ensuring the adjustment accuracy of the threads and prolonging the service life of the nut and the stud.

[0018] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments, and that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and it is intended that all changes and modifications which come within the meaning and range of equivalency of the claims are resolutely intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0019] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A structure for eliminating a gap between a threaded fitting, characterized by: The nut is provided with threaded holes penetrating through left and right ends thereof, the threaded holes are internally threaded, the stud is externally threaded and cooperates with the internal thread to form a threaded pair, a limiting slot coaxial with the internal hole of the threaded hole is formed in the threaded hole, and an elastic sealing ring is mounted in the limiting slot.

2. The structure for eliminating the gap of the screw thread engagement according to claim 1, wherein: The longitudinal section of the limiting slot is rectangular, and an elastic gap exists between the inner side wall of the limiting slot and the outer side wall of the elastic sealing ring.

3. The structure for eliminating the gap of the screw thread engagement according to claim 2, wherein: The left and right ends of the threaded hole are respectively provided with first and second guide surfaces, and the axes of the first and second guide surfaces overlap with the axis of the threaded hole.

4. The structure for eliminating the gap of the screw thread engagement according to claim 3, wherein: The elastic sealing ring is made of rubber or silicone.

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