CN206830612U - A kind of stop nut - Google Patents

Abstract

The utility model provides an anti-loosening nut, which includes a nut installation sleeve, a drive nut and a lock nut, the drive nut is installed in the nut installation sleeve, a driving part is arranged above the drive nut, and the lock nut A constriction part is provided below the constriction part, and several slots are axially opened on the side wall of the constriction part. The inner wall of the nut mounting sleeve is provided with an annular limiting groove, and the driving part drives the end of the clamping bar to radially expand and insert into the annular limiting groove. By driving the nut to control the radial shrinkage of the constriction part of the lock nut, the pre-tightening force of the radial connection of the bolt can be enhanced to achieve the purpose of anti-loosening. Lock with the nut mounting sleeve to ensure the stability of the connection and further improve the anti-loosening effect.

Description

A locknut

【Technical field】

The utility model relates to the technical field of fasteners, in particular to a lock nut.

【Background technique】

Fasteners are the general term for a class of mechanical parts used to fasten two or more parts (or components) to form a whole. Nuts are one of the most widely used fasteners. Nuts are parts that tightly connect mechanical equipment. Through the inner threads, they are used together with nuts and bolts of the same specification. If the bolts are unscrewed from the nuts, it can be used These two parts are separated, so the connection is a detachable connection, and can also be widely used on panels. When the mechanical equipment is running, it will inevitably produce mechanical vibration. Long-term mechanical vibration will cause the nut to shake, lead to thread wear, and make the fastening effect worse, affecting the working performance and stability of the mechanical equipment, especially affecting some precision equipment. Machining accuracy, and the phenomenon that the bolt may come out of the threaded hole of the nut may occur, thereby causing mechanical failure, so a lock nut is proposed.

【Content of utility model】

The purpose of this utility model is to solve the problems in the prior art, and to propose a lock nut, which controls the radial shrinkage of the tightening part of the lock nut through the drive nut, which can enhance the radial connection pre-tightening force of the bolt and achieve the purpose of loosening At the same time, the driving bolt drives the clamping strip to be embedded in the nut mounting sleeve to lock the lock nut and the nut mounting sleeve to ensure the stability of the connection and further improve the anti-loosening effect.

In order to achieve the above object, the utility model proposes a lock nut, including a nut mounting sleeve, a driving nut and a locking nut, the driving nut is installed in the nut mounting sleeve, and a driving part is arranged above the driving nut. A constriction part is provided under the lock nut, and several slots are axially opened on the side wall of the constriction part. As for the tightening strip, the inner wall of the nut mounting sleeve is provided with an annular limiting groove, and the driving part drives the end of the clamping strip to radially expand and insert into the annular limiting groove.

As a preference, the nut installation sleeve is provided with a first installation body, the shape of the cross-sectional outer contour of the first installation body is a regular hexagon, and a first installation cavity is opened in the first installation body, and the first installation body The side wall of the cavity is provided with an annular limit groove, a drive cavity is provided under the first installation cavity, the cross-sectional shape of the drive cavity is a regular hexagon, and a limit convex edge is provided under the first installation body, The position-limiting convex edge is matched with the lower end surface of the driving nut, and a second installation cavity is arranged inside the position-limiting convex edge, and the axis of the second installation cavity coincides with the axis of the first installation cavity.

Preferably, the driving nut also includes a connecting body, a hexagonal driving body, a movable pin and a first threaded cavity, the first threaded cavity runs through the center of the driving nut, a driving part is arranged above the connecting body, and the connecting body A hexagonal driving body is provided below the body, and the hexagonal driving body matches the inner cavity of the nut mounting sleeve. A blind hole is opened on the side wall of the hexagonal driving body, and the movable pin is installed in the blind hole through a spring. The side wall of the nut mounting sleeve is provided with a through hole, and the movable pin is matched with the through hole.

Preferably, the driving part is an annular convex body, the inner wall of the driving part is provided with a first driving surface, the first driving surface is a tapered surface, the first driving surface is matched with the constriction part, and the The upper end surface of the driving part is provided with a second driving surface, the second driving surface is an arc-shaped surface, and the second driving surface is matched with the clamping strip.

Preferably, the lock nut further includes a second mounting body and a second threaded cavity, the shape of the cross-sectional outer contour of the second mounting body is a regular hexagon, and the second threaded cavity runs through the center of the lock nut, A constriction part is provided under the second mounting body, and the constriction part is a cone.

Preferably, the number of the clamping strips is at least two, the said clamping strips are evenly distributed around the circumference, and the said clamping strips are L-shaped elastic clamping strips.

Beneficial effects of the utility model: the utility model controls the radial contraction of the tightening part of the lock nut through the cooperation of the nut installation sleeve, the drive nut and the lock nut, etc., and can enhance the radial connection pretightening force of the bolt to achieve For the purpose of anti-loosening, at the same time, the driving bolt drives the clamping strip to be embedded in the nut mounting sleeve to lock the lock nut and the nut mounting sleeve to ensure the stability of the connection and further improve the anti-loosening effect.

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

【Description of drawings】

Fig. 1 is a schematic cross-sectional structure diagram of a lock nut of the present invention;

Fig. 2 is a schematic structural view of a locking nut of a lock nut of the present invention;

Fig. 3 is a schematic structural view of a driving nut of a lock nut of the present invention;

Fig. 4 is a schematic structural view of a nut mounting sleeve of a locknut of the present invention;

Fig. 5 is a schematic cross-sectional view of a lock nut of a lock nut of the present invention;

Fig. 6 is a schematic cross-sectional view of a nut mounting sleeve of a locknut of the present invention.

【detailed description】

Referring to Fig. 1 to Fig. 6, a lock nut of the utility model includes a nut mounting sleeve 1, a driving nut 2 and a locking nut 3, the driving nut 2 is installed in the nut mounting sleeve 1, and above the driving nut 2 A drive part 23 is provided, and a constriction part 32 is provided under the lock nut 3, and several slots 321 are axially opened on the side wall of the constriction part 32, and the drive part 23 drives the constriction part 32 to shrink radially A plurality of clamping strips 33 are arranged on the top of the tightening part 32, and the inner wall of the nut installation sleeve 1 is provided with an annular limiting groove 121, and the driving part 23 drives the ends of the clamping strips 33 to radially expand and insert In the annular limiting groove 121. The nut installation sleeve 1 is provided with a first installation body 11, the shape of the cross-sectional outer contour of the first installation body 11 is a regular hexagon, and a first installation cavity 12 is opened in the first installation body 11. The side wall of the first installation chamber 12 is provided with an annular limiting groove 121, and the bottom of the first installation chamber 12 is provided with a driving chamber 13, the cross-sectional shape of the driving chamber 13 is a regular hexagon, and the first installation body 11 is provided with a limit convex edge 111, the limit convex edge 111 is matched with the lower end surface of the drive nut 2, and the second installation cavity 112 is arranged inside the limit convex edge 111, and the second installation cavity 112 The axis coincides with the axis of the first installation cavity 12 . The driving nut 2 also includes a connecting body 21, a hexagonal driving body 22, a movable pin 24 and a first threaded cavity 25, the first threaded cavity 25 runs through the center of the driving nut 2, and a drive is arranged above the connecting body 21. part 23, a hexagonal driving body 22 is provided under the connecting body 21, and the hexagonal driving body 22 is matched with the inner cavity of the nut installation sleeve 1, and a blind hole 221 is opened on the side wall of the hexagonal driving body 22, and the The movable pin 24 is installed in the blind hole 221 through a spring, and the side wall of the nut mounting sleeve 1 is provided with a through hole 14 , and the movable pin 24 is matched with the through hole 14 . The driving part 23 is an annular convex body, the inner wall of the driving part 23 is provided with a first driving surface 231, the first driving surface 231 is a tapered surface, and the first driving surface 231 is matched with the constriction part 32 , the upper end surface of the driving part 23 is provided with a second driving surface 232 , the second driving surface 232 is an arc-shaped surface, and the second driving surface 232 cooperates with the clamping bar 33 . The locking nut 3 also includes a second mounting body 31 and a second thread cavity 34, the shape of the cross-sectional outer contour of the second mounting body 31 is a regular hexagon, and the second thread cavity 34 runs through the locking nut 3 The center of the second installation body 31 is provided with a constriction part 32, and the constriction part 32 is a conical body. The number of the clamping strips 33 is at least two, the said clamping strips 33 are evenly distributed around the circumference, and the said clamping strips 33 are L-shaped elastic clamping strips.

The working process of the utility model:

The utility model is a kind of anti-loosening nut. In the process of installation, the drive nut 2 is first installed in the nut installation sleeve 1. During the installation process, the side with the movable pin 24 is aligned with the side where the through hole 14 is located, and the movable pin 2 Insert it into the through hole 14 to complete the limited installation of the combination, and then install the combination on the fastener with a wrench. During the tightening process, the drive cavity 13 cooperates with the hexagonal drive body 22. After the combination is installed, use The wrench screws the lock nut 3 onto the fastener, and during the tightening process, the first driving surface 231 controls the radial shrinkage of the tightening part 32 of the lock nut 3 to clamp the fastener, which can enhance the bolt's radial connection readiness. tightening force to achieve the purpose of anti-loosening, and at the same time, the second driving surface 232 drives the clamping strip 33 to radially expand, and is embedded in the annular limit groove 121 of the nut mounting sleeve, so that the lock nut and the nut mounting sleeve can be locked. Ensure the stability of the connection and further improve the anti-loosening effect.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any scheme after a simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (6)

1. A kind of 1. stop nut, it is characterised in that：It is described including nut installation set (1), drive nut (2) and locking nut (3) Drive nut (2) is arranged in nut installation set (1), and the top of the drive nut (2) is provided with drive division (23), the locking The lower section of nut (3) is provided with constriction (32), and the side wall of the constriction (32) axially offers several slots (321), institute Drive division (23) driving constriction (32) radial contraction is stated, the top of the constriction (32) is provided with several clamping bars (33), The inwall of the nut installation set (1) offers annular spacing groove (121), the end of drive division (23) the driving clamping bar (33) In portion's radial dilatation insertion annular spacing groove (121).
2. A kind of 2. stop nut as claimed in claim 1, it is characterised in that：The nut installation set (1) is provided with the first peace Body (11) is filled, the first fixing body (11) section outline is shaped as regular hexagon, opened in first fixing body (11) Provided with the first installation cavity (12), the side wall of first installation cavity (12) offers annular spacing groove (121), first installation The lower section of chamber (12) is provided with driving chamber (13), and the cross sectional shape of the driving chamber (13) is regular hexagon, first fixing body (11) lower section is provided with limit convex along (111), and the limit convex is engaged along (111) with the lower surface of drive nut (2), described Limit convex is provided with the second installation cavity (112), the axis and the first installation cavity (12) of second installation cavity (112) along (111) Axis coincide.
3. A kind of 3. stop nut as claimed in claim 1, it is characterised in that：The drive nut (2) also includes connector (21), hexagonal driving body (22), removable pin (24) and the first thread cavity (25), first thread cavity (25) run through drive nut (2) center, the top of the connector (21) are provided with drive division (23), and the lower section of the connector (21) drives provided with hexagonal Body (22), the hexagonal driving body (22) are engaged with nut installation set (1) inner chamber, and the side wall of the hexagonal driving body (22) is opened Provided with blind hole (221), the removable pin (24) is arranged in blind hole (221) by spring, the side wall of the nut installation set (1) Through hole (14) is offered, the removable pin (24) is engaged with through hole (14).
4. A kind of 4. stop nut as claimed in claim 1, it is characterised in that：The drive division (23) is annular convex, described The inwall of drive division (23) is provided with the first drive surface (231), and first drive surface (231) is taper surface, first driving Face (231) is engaged with constriction (32), and the upper surface of the drive division (23) is provided with the second drive surface (232), and described second Drive surface (232) is arcwall face, and second drive surface (232) is engaged with clamping bar (33).
5. A kind of 5. stop nut as claimed in claim 1, it is characterised in that：The locking nut (3) also includes the second installation Body (31) and the second thread cavity (34), the section outline of second fixing body (31) are shaped as regular hexagon, and described Two thread cavities (34) run through the center of locking nut (3), and the lower section of second fixing body (31) is provided with constriction (32), described Constriction (32) is bullet.
6. A kind of 6. stop nut as claimed in claim 1, it is characterised in that：The number of the clamping bar (33) is at least two Individual, the clamping bar (33) is distributed in uniform circular, and the clamping bar (33) is L-shaped elastic clipping strip.