CN209800501U

CN209800501U - Anti-loose nut

Info

Publication number: CN209800501U
Application number: CN201920309303.XU
Authority: CN
Inventors: 常佳佳; 严诚毅; 白晓青
Original assignee: ZHEJIANG HENGXING TRANSMISSION TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG HENGXING TRANSMISSION TECHNOLOGY Co Ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2019-12-17
Anticipated expiration: 2029-03-12

Abstract

The utility model discloses a locknut, which comprises a nut body in threaded connection with a threaded shaft, wherein a wedge groove is arranged on one side of the nut body close to the threaded shaft, a wedge is arranged in the wedge groove, a pressing block groove is arranged on one side of the wedge groove opposite to the threaded shaft, and a pressing block capable of moving along the radial direction of the nut body is arranged in the pressing block groove; one side of the wedge block is attached to the external thread on the threaded shaft, the other side of the wedge block is attached to the pressing block, the transverse width of the pressing block is larger than that of the wedge block, the thickness of one end, close to the screwing-out direction of the nut body, of the wedge block is larger than that of the other end of the wedge block, and a pressing mechanism used for driving the pressing block to apply pressing force to the wedge block is arranged between the nut body and the pressing block. The utility model discloses locking effectual, when using, only need to realize locking effect through a nut, need not to extend the threaded spindle, reduced the occupation space of threaded spindle to the plant equipment, saved the cost.

Description

Anti-loose nut

Technical Field

The utility model relates to a nut locking technical field, in particular to locknut.

Background

In the present apparatus, bolt connection is used in many places. In the long-time use process, the nut and the stud are easy to loosen, so that the connection is failed. The thread looseness prevention is a technical problem which must be solved for safety. The double-nut anti-loosening structure is a commonly used anti-loosening structure at present. For example, chinese patent publication No. CN108194477A, the utility model discloses a self-locking double-nut anti-loosening fastening device, which comprises a positive and negative double-thread bolt, a fastening nut, a limit nut, and a spring washer, wherein the fastening nut is close to the fastening member, and the spring washer is arranged between the limit nut and the fastening nut; the rotation directions of the threads of the fastening nut and the limiting nut are opposite, when the fastening nut is a right-handed thread, the limiting nut is a left-handed thread, and when the fastening nut is a left-handed thread, the limiting nut is a right-handed thread; a fastening nut limiting key is arranged on the side surface of the fastening nut close to the spring washer; a limit nut limiting key is arranged on the side surface of the limit nut close to the tight spring washer; the fastening nut limiting key and the limiting nut limiting key are respectively in contact fit with one end of the spring washer; when the fastening nut is a right-handed thread, the spring washer is a left-handed spring washer when the limiting nut is a left-handed thread, and when the fastening nut is a left-handed thread, the spring washer is a right-handed spring washer when the limiting nut is a right-handed thread. The utility model discloses a weak point lies in: because the anti-loosening mode needs to use two nuts at the same time, enough arrangement space needs to be reserved on the bolt or the threaded shaft in advance, so that the bolt or the threaded shaft needs to be lengthened, the cost is increased, the occupied space of the bolt or the threaded shaft on equipment is increased, and the miniaturization of the equipment is not facilitated; secondly, the anti-loosening mechanism needs to use two nuts at the same time, the bolt must be provided with a positive and negative two-way thread, the anti-loosening effect can be achieved only by meeting the conditions, and the conventional bolt or threaded shaft does not have the conditions of the positive and negative two-way thread, so that the anti-loosening mode is difficult to apply to a common bolt or threaded shaft, and the application range is greatly limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving current two nut locking mechanism must use two nuts simultaneously when using, need reserve the sufficient space of arranging before bolt or threaded shaft lift, lead to bolt or threaded shaft to need extend, not only increased the cost, also increased bolt or threaded shaft to the occupation space's of equipment problem, provide a lock nut, can effectively solve above-mentioned problem.

The utility model aims at realizing through the following technical scheme: a locknut comprises a nut body in threaded connection with a threaded shaft, wherein a wedge groove is formed in one side, close to the threaded shaft, of the nut body, a wedge is arranged in the wedge groove, a pressing block groove is formed in one side, opposite to the threaded shaft, of the wedge groove, and a pressing block capable of moving along the radial direction of the nut body is arranged in the pressing block groove; one side of the wedge block is attached to the external thread on the threaded shaft, the other side of the wedge block is attached to the pressing block, the transverse width of the pressing block is larger than that of the wedge block, the thickness of one end, close to the screwing-out direction of the nut body, of the wedge block is larger than that of the other end of the wedge block, and the friction force when the wedge block is in contact with the pressing block is smaller than that when the wedge block is in contact with the threaded shaft; and a pressing mechanism for driving the pressing block to apply pressing force to the wedge block is arranged between the nut body and the pressing block.

When the utility model is used, the nut body is screwed into the threaded shaft and screwed, and then the wedge block is placed between the pressing block and the threaded shaft; when placing the voussoir, with the one end orientation nut body's that thickness is big on the voussoir direction of unscrewing, then adjust hold-down mechanism and compress tightly voussoir and threaded shaft, nut body and threaded shaft just are in locking state. The wedge blocks tightly wedge the nut body and the threaded shaft. When the nut body is in a locking state, the friction force generated when the wedge block is in contact with the pressing block is smaller than the friction force generated when the wedge block is in contact with the threaded shaft, so that the wedge block and the threaded shaft are relatively fixed, and the pressing block and the wedge block are relatively rotated; because be close to the thickness that nut body screwed out direction one end thickness is greater than the other end on the voussoir, when the nut body was rotatory toward the orientation of unscrewing like this, because the nut body can move toward the great one end of voussoir thickness, the voussoir just can be with nut body wedging, the not hard up of restriction nut body to locking effect has been played. When the nut needs to be disassembled, the pressing mechanism is only needed to be adjusted, the wedge block and the pressing block are loosened, the wedge block is taken out, and the nut body can be normally screwed out from the threaded shaft. The utility model discloses when using, only need just can realize locking effect through a nut, need not to extend the threaded spindle, reduced the occupation space of threaded spindle to the equipment, saved the cost. Compare traditional two nut locking mechanism, the utility model discloses need not to set up positive and negative two-way screw thread on threaded spindle or bolt, all can be suitable for on general bolt or threaded spindle, application range is more extensive.

Preferably, the transverse section of the briquette is circular arc.

Preferably, a fitting layer that can be fitted to the male screw on the threaded shaft is provided on the wedge on the side closer to the threaded shaft. The embedded layer can be embedded into the external thread on the threaded shaft under the action of pressure, the attaching degree of the wedge block and the side face of the threaded shaft is improved in a thread embedding mode, and the friction force between the wedge block and the threaded shaft is increased.

Preferably, the fitting layer is made of rubber or brass. The rubber or brass material is softer, can imbed effectively in the screw thread for the laminating degree with the screw thread is better.

Preferably, the pressing mechanism comprises a pressing screw in threaded connection with the nut body, the pressing screw is arranged along the moving direction of the pressing block, the front end of the pressing screw is abutted to the pressing block, and the other end of the pressing screw extends to the outer side of the nut body. The pressing mechanism enables the pressing screw to move axially by rotating the pressing screw, and pushes the pressing block to move, so that the pressing block pushes the wedge block and the wedge block is tightly pressed with the threaded shaft.

The utility model has the advantages that: the utility model discloses when using, only need just can realize locking effect through a nut, need not to extend the threaded spindle, reduced the occupation space of threaded spindle to the equipment, saved the cost. Compare traditional two nut locking mechanism, the utility model discloses need not to set up positive and negative two-way screw thread on threaded spindle or bolt, all can be suitable for on general bolt or threaded spindle, application range is more extensive.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the present invention when connected to a threaded shaft.

Fig. 3 is a sectional view taken along a-a in fig. 2.

Fig. 4 is an enlarged view of a portion a of fig. 3.

Fig. 5 is a sectional view taken in the direction B-B in fig. 2.

In the figure: 1. the nut comprises a nut body, 2, a wedge block groove, 3, a pressing block, 4, a wedge block, 5, a compression screw, 6, a threaded shaft, 7, an embedded layer and 8, and the pressing block groove.

Detailed Description

The invention will be further described with reference to the following detailed description and accompanying drawings.

Example (b): as shown in fig. 1 to 5, a locknut includes a nut body 1 screwed with a threaded shaft 6. The nut body 1 is provided with an internal thread matched with the threaded shaft 6. One side of the nut body 1 close to the threaded shaft 6 is provided with a wedge groove 2. The transverse section of the wedge block groove 2 is arc-shaped. A wedge 4 is arranged in the wedge groove 2. And a block pressing groove 8 is formed in one side, opposite to the threaded shaft 6, of the wedge groove 2. The opening of the pressing block groove 8 is opposite to the threaded shaft 6. The pressing block groove 8 is provided with a pressing block 3 which can move along the radial direction of the nut body 1. The pressing block 3 is matched with the pressing block groove 8. The transverse section of the pressing block 3 is circular arc. One side of the wedge block 4 close to the threaded shaft 6 is attached to the external thread on the threaded shaft 6, and the other side of the wedge block 4 is attached to the pressing block 3. The transverse width of the pressing block 3 is larger than that of the wedge block 4, and the thickness of one end, close to the screwing-out direction of the nut body 1, of the wedge block 4 is larger than that of the other end of the wedge block. The friction force when the wedge 4 contacts the pressing block 3 is smaller than the friction force when the wedge 4 contacts the threaded shaft 6. The wedge 4 is provided with a fitting layer 7 on a side close to the threaded shaft 6, which is capable of fitting with the external thread on the threaded shaft 6. In the present embodiment, the fitting layer 7 is made of rubber or brass.

A pressing mechanism is arranged between the nut body 1 and the pressing block 3. The pressing mechanism is used for pushing the pressing block 3 to move and applying pressing force to the wedge block 4 through the pressing block 3. The pressing mechanism comprises a pressing screw 5 which is in threaded connection with the nut body 1. In this embodiment, two compression screws 5 are provided, and are respectively located at two ends of the pressing block. The pressing screw 5 is provided along the moving direction of the pressing block 3. The front end of the compression screw 5 is abutted against the pressing block 3. The other end of the compression screw 5 extends to the outside of the nut body 1. The pressing mechanism enables the pressing screw to move axially by rotating the pressing screw, and pushes the pressing block to move, so that the pressing block pushes the wedge block and the wedge block is pressed with the threaded shaft.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the principles of the present invention.

Claims

1. The utility model provides a locknut, includes nut body (1) with threaded shaft (6) threaded connection, its characterized in that: a wedge groove (2) is formed in one side, close to the threaded shaft (6), of the nut body (1), a wedge (4) is arranged in the wedge groove (2), a pressing block groove (8) is formed in one side, opposite to the threaded shaft (6), of the wedge groove (2), and a pressing block (3) capable of moving along the radial direction of the nut body (1) is arranged in the pressing block groove (8); one side of the wedge block (4) is attached to an external thread on the threaded shaft (6), the other side of the wedge block (4) is attached to the pressing block (3), the transverse width of the pressing block (3) is larger than that of the wedge block (4), the thickness of one end, close to the screwing-out direction of the nut body (1), of the wedge block (4) is larger than that of the other end of the wedge block, and the friction force when the wedge block (4) is in contact with the pressing block (3) is smaller than that when the wedge block (4) is in contact with the threaded shaft (6); and a pressing mechanism for driving the pressing block (3) to apply pressing force on the wedge block (4) is arranged between the nut body (1) and the pressing block (3).

2. Locknut according to claim 1, characterized in that the transverse cross-section of the pressing piece (3) is circular arc-shaped.

3. Locknut according to claim 1, characterized in that the wedge (4) is provided with a layer (7) on the side close to the threaded shaft (6) which engages with the external thread on the threaded shaft (6).

4. A locknut according to claim 3, characterized in that said interfitting layer (7) is made of rubber or brass.

5. The locknut according to claim 1, 2, 3 or 4, characterized in that the compression mechanism comprises a compression screw (5) which is screwed on the nut body (1), the compression screw (5) is arranged along the moving direction of the pressing block (3), the front end of the compression screw (5) is against the pressing block (3), and the other end of the compression screw (5) extends to the outside of the nut body (1).