Ratchet thread anti-loosening structure

Abstract

The invention provides a ratchet thread anti-loosening structure, which relates to the technical field of threaded connection and comprises an anti-loosening cover, an external thread shaft is arranged in the anti-loosening cover, a shaft retainer ring is arranged on the surface of the external thread shaft, an internal thread sleeve is arranged on the surface of the external thread shaft, and the anti-loosening cover is arranged between the external thread shaft and the internal thread sleeve. A plurality of set screws are arranged between the anti-loosening cover and the inner thread sleeve, an outer hexagonal shaft is arranged on the surface of the outer thread shaft, an inner hexagonal hole is formed in the anti-loosening cover, a first ratchet structure is arranged on the inner wall of the inner hexagonal hole, a first spiral face is arranged in the first ratchet structure, and a second ratchet structure is arranged on the surface of the inner thread sleeve. A second spiral face is arranged in the second ratchet structure. The number of the set screws and the number of the internal thread sleeves are relatively prime, so that in the tightening state, the end faces of the set screws can be matched with the second spiral face of the second ratchet structure, the external thread shaft and the external thread sleeve ring are relatively static, and the anti-loosening effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of threaded connection, and in particular to a ratchet thread anti-loosening structure. Background Art

[0002] Threaded connection is one of the most common methods in mechanical connection systems. It is a connection method that screws together external threads and internal threads. It is widely used in packaging machinery, food machinery, light industrial machinery, agricultural machinery, metallurgy and mining, petrochemical industry, machine tools, automobiles, weapons, aviation and power stations.

[0003] During the operation of mechanical products, vibration is inevitable. During the vibration, the threads of the threaded connection parts gradually loosen or come off, thus affecting the normal operation of the mechanical equipment. The existing thread anti-loosening technologies are mainly divided into three types: friction type, locking type and permanent type. The friction type has the lowest cost and is easy to disassemble, but the anti-loosening effect is the worst. The locking type can only be used in limited occasions and has a high cost. The permanent type is to destroy the thread to prevent loosening, which has the best anti-loosening effect, but it cannot be disassembled.

[0004] Therefore, there is an urgent need for a ratchet thread anti-loosening structure that can solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to solve the problem in the prior art that the threaded connection parts of the existing partial ratchet threads gradually become loose or come off during the mechanical operation vibration.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a ratchet thread anti-loosening structure, including an anti-loosening cover, an externally threaded shaft is arranged inside the anti-loosening cover, a shaft retaining ring is arranged on the surface of the externally threaded shaft, an internally threaded sleeve is arranged on the surface of the externally threaded shaft, the anti-loosening cover is arranged between the externally threaded shaft and the internally threaded sleeve, and a plurality of fixing screws are arranged between the anti-loosening cover and the internally threaded sleeve.

[0007] Preferably, an external hexagonal shaft is provided on the surface of the external threaded shaft, an internal hexagonal hole is provided inside the anti-loosening cover, a No. 1 ratchet structure is provided on the inner wall of the internal hexagonal hole, a No. 1 spiral surface is provided inside the No. 1 ratchet structure, a No. 2 ratchet structure is provided on the surface of the internal threaded sleeve, and a No. 2 spiral surface is provided inside the No. 2 ratchet structure.

[0008] Preferably, an external hexagonal shaft is arranged on the externally threaded shaft, and the internal hexagonal hole of the anti-loosening cover cooperates with the external hexagonal shaft of the externally threaded shaft.

[0009] Preferably, a plurality of No. 2 ratchet structures are provided on the end surface of the threaded hole of the internal threaded sleeve, and the number of the ratchet teeth is coprime with the number of the set screws.

[0010] Preferably, a threaded hole is provided on the anti-loosening cover, and the threaded hole provided on the anti-loosening cover cooperates with the set screw.

[0011] Preferably, the No. 2 ratchet structure provided on the internal threaded sleeve cooperates with the set screw.

[0012] Compared with the prior art, the beneficial effect of the present invention is that by making the number of set screws and the number of internal threaded sleeves mutually prime, in this way, in the tightened state, the end face of the set screw will cooperate with the second spiral surface of the second ratchet structure, thereby realizing the relative stillness of the externally threaded shaft and the externally threaded sleeve ring, achieving an anti-loosening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It shows an exploded view provided according to the first embodiment of the present invention;

[0014] Figure 2 It shows a structural diagram of an external threaded shaft provided according to the first embodiment of the present invention;

[0015] Figure 3 It shows a structural diagram of an anti-loosening cover provided according to the first embodiment of the present invention;

[0016] Figure 4 It shows a structural diagram of an internal thread sleeve provided according to Embodiment 1 of the present invention;

[0017] Figure 5 A schematic diagram showing the cooperation between the set screw and the internal threaded sleeve during operation according to the first embodiment of the present invention is shown;

[0018] Figure 6 An exploded view according to the second embodiment of the present invention is shown;

[0019] Figure 7 It shows a structural diagram of an external threaded shaft provided according to the second embodiment of the present invention;

[0020] Figure 8 It shows a structural diagram of an anti-loosening cover provided according to the second embodiment of the present invention;

[0021] Fig. 9 It shows a structural diagram of an internal thread sleeve provided according to the second embodiment of the present invention;

[0022] Fig.10 A schematic diagram showing the cooperation between the set screw and the internal thread sleeve during operation according to the second embodiment of the present invention is shown;

[0023] Fig.11 A schematic cross-sectional view of the overall structure according to the present invention is shown.

[0024] Legend:

[0025] 1. External threaded shaft; 11. External hexagonal shaft; 2. Shaft retaining ring; 3. Anti-loosening cover; 31. Internal hexagonal hole; 32. No. 1 ratchet structure; 321. No. 1 spiral surface; 4. Set screw; 5. Internal threaded sleeve; 51. No. 2 ratchet structure; 511. No. 2 spiral surface. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0028] like Figure 1-11 As shown, in an embodiment of the present invention: a ratchet thread anti-loosening structure includes an anti-loosening cover 3.

[0029] In specific operation, an externally threaded shaft 1 is arranged inside the anti-loosening cover 3, a shaft retaining ring 2 is arranged on the surface of the externally threaded shaft 1, an internally threaded sleeve 5 is arranged on the surface of the externally threaded shaft 1, the anti-loosening cover 3 is arranged between the externally threaded shaft 1 and the internally threaded sleeve 5, and a plurality of set screws 4 are arranged between the anti-loosening cover 3 and the internally threaded sleeve 5.

[0030] An external hexagonal shaft 11 is provided on the surface of the external threaded shaft 1, an internal hexagonal hole 31 is provided inside the anti-loosening cover 3, a No. 1 ratchet structure 32 is provided on the inner wall of the internal hexagonal hole 31, a No. 1 spiral surface 321 is provided inside the No. 1 ratchet structure 32, a No. 2 ratchet structure 51 is provided on the surface of the internal threaded sleeve 5, and a No. 2 spiral surface 511 is provided inside the No. 2 ratchet structure 51.

[0031] Through the above technical solution, by utilizing the hexagonal structure of the anti-loosening cover 3 and the externally threaded shaft 1, the externally threaded shaft and the externally threaded collar are kept relatively still, thereby achieving an anti-loosening effect.

[0032] An external hexagonal shaft is arranged on the external threaded shaft 1 , and the internal hexagonal hole 31 of the anti-loosening cover 3 matches with the external hexagonal shaft of the external threaded shaft 1 .

[0033] A plurality of No. 2 ratchet structures 51 are disposed on the end surface of the threaded hole of the internal threaded sleeve 5 , and the number of the ratchet structures 51 is coprime with the number of the set screws 4 .

[0034] Through the above technical solution, in the tightened state, since the number of the set screws 4 and the number of ratchets of the internal threaded sleeve 5 are mutually prime, the end face of the set screw 4 must be matched with the second helical surface 511 of the second ratchet structure 51, and the rotation direction of the second helical surface 511 is the same as the rotation direction of the thread, so that the anti-loosening cover 3 cannot rotate.

[0035] The anti-loosening cover 3 is provided with a threaded hole, and the threaded hole provided on the anti-loosening cover 3 is matched with the set screw 4.

[0036] The second ratchet structure 51 provided on the internal thread sleeve 5 cooperates with the set screw 4 .

[0037] Through the above technical solution, in the tightened state, since the number of the set screws 4 and the number of ratchets of the anti-loosening cover 3 are mutually prime, the end face of the set screw 4 must be matched with the No. 1 spiral surface 321 of the No. 1 ratchet structure 32, and the rotation direction of the No. 1 spiral surface 321 is the same as the rotation direction of the thread, so that the anti-loosening cover 3 cannot rotate, thereby achieving an anti-loosening effect.

[0038] In summary, the working principle of the present invention is: Figure 1-5 , this embodiment is an application mode of the present device. In the tightened state, since the number of the set screw 4 and the number of the ratchet teeth of the internal thread sleeve 5 are mutually prime, there must be an end face of the set screw 4 that matches the second helical surface 511 of the second ratchet structure 51, and the rotation direction of the second helical surface 511 is the same as the rotation direction of the thread, so that the anti-loosening cover 3 cannot rotate, and the anti-loosening cover 3 and the external threaded shaft 1 have a hexagonal structure, thereby achieving relative stillness of the external threaded shaft and the external threaded sleeve ring, and achieving an anti-loosening effect;

[0039] See also Figure 6-11 This embodiment is an application mode of the present device. In the tightened state, since the number of the set screws 4 and the number of the ratchets of the anti-loosening cover 3 are mutually prime, there must be an end face of the set screw 4 that cooperates with the No. 1 spiral surface 321 of the No. 1 ratchet structure 32, and the rotation direction of the No. 1 spiral surface 321 is the same as the rotation direction of the thread, so that the anti-loosening cover 3 cannot rotate. The anti-loosening cover 3 and the externally threaded shaft 1 have a hexagonal structure, thereby realizing the relative stillness of the externally threaded shaft and the externally threaded collar, and achieving the anti-loosening effect.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A ratchet thread anti-loosening structure, comprising an anti-loosening cover, characterized in that: An externally threaded shaft is arranged inside the anti-loosening cover, a shaft retaining ring is arranged on the surface of the externally threaded shaft, an internally threaded sleeve is arranged on the surface of the externally threaded shaft, the anti-loosening cover is arranged between the externally threaded shaft and the internally threaded sleeve, and a plurality of fixing screws are arranged between the anti-loosening cover and the internally threaded sleeve.

2. A ratchet thread anti-loosening structure according to claim 1, characterized in that: The surface of the external threaded shaft is provided with an external hexagonal shaft, the interior of the anti-loosening cover is provided with an internal hexagonal hole, the inner wall of the internal hexagonal hole is provided with a No. 1 ratchet structure, a No. 1 spiral surface is provided in the No. 1 ratchet structure, the surface of the internal threaded sleeve is provided with a No. 2 ratchet structure, and a No. 2 spiral surface is provided in the No. 2 ratchet structure.

3. A ratchet thread anti-loosening structure according to claim 2, characterized in that: An external hexagonal shaft is arranged on the externally threaded shaft, and the internal hexagonal hole of the anti-loosening cover cooperates with the external hexagonal shaft of the externally threaded shaft.

4. A ratchet thread anti-loosening structure according to claim 2, characterized in that: A plurality of No. 2 ratchet structures are arranged on the end face of the threaded hole of the internal threaded sleeve, and the number of the ratchet teeth is coprime with the number of the set screws.

5. A ratchet thread anti-loosening structure according to claim 1, characterized in that: The anti-loosening cover is provided with a threaded hole, and the threaded hole provided on the anti-loosening cover is matched with a set screw.

6. A ratchet thread anti-loosening structure according to claim 2, characterized in that: The No. 2 ratchet structure provided on the internal thread sleeve cooperates with the set screw.

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