CN211332947U - Special sleeve for self-locking nut - Google Patents

Abstract

The utility model relates to a special sleeve of auto-lock nut, be equipped with the sleeve body of hole including its first end, this hole and the nut phase-match that corresponds and be used for transmitting torsion to above-mentioned nut, the wall of hole sets to the second pore wall structure that can act on simultaneously the first pore wall structure of two nuts of auto-lock nut and can act on alone the outer end nut of the correspondence of auto-lock nut. When the self-locking nut is specifically disassembled, the upper nut at the outer end of the self-locking nut and the lower nut at the inner end of the self-locking nut can be loosened through the second hole wall structure of the sleeve, and then the first hole wall structure of the sleeve is switched to simultaneously act on the two nuts of the self-locking nut to disassemble the two nuts. This has effectively avoided needing to dismantle the last nut of top earlier among the prior art, then will be located the lower nut of below and from the numerous and diverse operation that the screw was dismantled, has improved the dismouting efficiency of auto-lock nut.

Description

Special sleeve for self-locking nut

Technical Field

The utility model relates to a fastener assembly and disassembly tools technical field especially relates to a special sleeve of auto-lock nut.

Background

The double-nut structure, such as a self-locking nut (also called a locknut or an eccentric nut), can effectively prevent the loosening problem caused by vibration and other reasons. The self-locking nut is matched in pairs for use and comprises an upper nut and a lower nut, the lower nut is firstly arranged below the upper nut and then arranged above the upper nut, wherein the lower nut or the lower nut is eccentrically processed in processing and can play a role of a wedge, and the double-nut structure is disclosed in the eccentric self-locking nut disclosed in the Chinese utility model patent with the application number of CN98237405.4 (the publication number of CN2395077Y), the eccentric self-locking nut disclosed in the CN200610134940.5 (the publication number of CN100425846C) and the eccentric anti-locking nut disclosed in the CN201420098238.8 (the publication number of CN 203809477U).

The self-locking nut is installed and is rotated the operation on the nut through spanner sleeve cover when dismantling, nevertheless there is certain not enough when adopting current spanner sleeve to dismantle above-mentioned self-locking nut, for example, current sleeve only has the interior hexagonal hole of a nut looks adaptation with corresponding specification usually, the degree of depth of this interior hexagonal hole is also unanimous with the thickness of the nut of corresponding specification, therefore need dismantle the last nut of top earlier when dismantling above-mentioned self-locking nut, then dismantle the lower nut from the screw that will be located the below again, therefore it is longer that the dismantlement process time-consuming, efficiency is not high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem to provide a can match two upper and lower nuts of auto-lock nut simultaneously and lift off or the special sleeve of auto-lock nut of screwing with the auto-lock nut conveniently to the current situation of prior art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the special sleeve for the self-locking nut comprises a sleeve body, wherein an inner hole is formed in the first end of the sleeve body, the inner hole is matched with a corresponding nut and is used for transmitting torsion to the nut, and the wall surface of the inner hole is set into a first hole wall structure capable of acting on two nuts of the self-locking nut simultaneously and a second hole wall structure capable of acting on the corresponding outer end nut of the self-locking nut independently.

For the thickness of one of them nut of simultaneous adaptation self-locking nut or the whole thickness of two supporting nuts, first pore wall structure includes a plurality of and the first recess of the edges and corners looks adaptation that corresponds the nut, second pore wall structure includes a plurality of and the second recess of the edges and corners looks adaptation that corresponds the nut, and wherein, first recess has first length along the axial of sleeve body, and the second recess has the second length along the axial of sleeve body, first length is greater than the second length. Specifically, the second length of the second groove can be selected according to the thicknesses of nuts of different specifications, wherein the second length is not greater than the thickness of a single nut, and preferably the second length is consistent with the thickness of the single nut, so that interference with another nut located below due to the fact that the second length is too long is avoided, the sleeve is conveniently directly sleeved on the corresponding single nut to perform rotation operation, and the dismounting efficiency is improved; correspondingly, the first length of the first groove is larger than the thickness of a single nut, and the whole of the self-locking nut positioned above the nut and at least part of the nut positioned below (inner end) are accommodated in the inner hole of the sleeve, so that the two nuts can be simultaneously disassembled and assembled through the first hole wall structure of the sleeve.

In order to facilitate machining and switching between a first hole wall structure and a second hole wall structure of the inner hole of the sleeve conveniently, the plurality of second grooves and the plurality of first grooves are sequentially arranged in a staggered mode along the circumferential direction of the inner hole.

In order to enable the inner hole of the sleeve to be matched with a conventionally used hexagon nut, the radial sections of the first hole wall structure and the second hole wall structure are both hexagonal. Of course, it is contemplated that the radial cross-section of the first bore wall structure and the radial cross-section of the second bore wall structure are not limited to hexagonal shapes and may be configured in various patterns, such as rectangular or other polygonal shapes, according to conventional nuts.

The self-locking nut's dismouting environment has lubricating oil more, in order to avoid the sleeve to take place the landing when taking, still be equipped with anti-skidding screw thread on the periphery wall of sleeve body.

In order to connect the sleeve with the socket wrench, the socket wrench further comprises a mounting hole which is arranged at the second end of the sleeve body and is used for being connected with the driving end of the socket wrench.

In order to enable the sleeve to conveniently slide into the inner hole of the sleeve when the sleeve is aligned with the nut and further improve the dismounting efficiency, the edge of the inner hole is also provided with a chamfer.

Compared with the prior art, the utility model has the advantages that: the utility model discloses a wall of special telescopic hole sets two kinds of pore wall structures into, wherein, first pore wall structure can act on two nuts of auto-lock nut simultaneously and carry out the dismouting with these two nuts simultaneously, second pore wall structure can act on the nut (top nut) of the outer end of auto-lock nut's correspondence alone and carry out the dismouting with the nut of this outer end, when specifically dismantling, the top nut of the outer end of auto-lock nut and inner lower nut are loosened earlier to telescopic second pore wall structure of accessible, then two nuts that switch telescopic first pore wall structure acts on auto-lock nut simultaneously unload these two nuts in the lump. This has effectively avoided needing to dismantle the last nut of top earlier among the prior art, then will be located the numerous and diverse operation that the lower nut of below detached from the screw again, has improved the dismouting efficiency of auto-lock nut, in addition, the utility model provides a sleeve not only is applicable to conventional auto-lock nut structure, is applicable to current other two nut structures equally.

Drawings

Fig. 1 is a front view of an embodiment of the present invention;

fig. 2 is a top view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

fig. 5 is a cross-sectional view taken at B-B in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The self-locking nut, also called as a locknut or an eccentric nut, can effectively prevent the problem of looseness caused by vibration and the like. The nut is matched in pairs and used and comprises an upper nut and a lower nut, the lower nut is firstly arranged below the upper nut and then arranged above the upper nut, wherein the upper nut or the lower nut is eccentrically processed in the processing process to play a role of a wedge, and the double-nut structure is disclosed in the eccentric self-locking nut disclosed in the Chinese utility model patent with the application number of CN98237405.4 (the publication number of CN2395077Y), the eccentric self-locking nut disclosed in the application number of CN200610134940.5 (the publication number of CN100425846C) and the eccentric anti-locking nut disclosed in the application number of CN201420098238.8 (the publication number of CN 203809477U).

Referring to fig. 1 to 5, the present embodiment provides a special socket for mounting or dismounting the above-mentioned double nuts, which includes a socket body 10, a first end 11 of the socket body 10 is provided with an inner hole 20 matched with a corresponding nut and used for transmitting torque to the nut, and a second end 12 of the socket body 10 is provided with a mounting hole 13 used for connecting with a driving end of a socket wrench, which is a square hole in the present embodiment.

In this embodiment, the wall surface of the inner hole 20 of the sleeve body 10 is configured into two hole wall structures, namely a first hole wall structure and a second hole wall structure, wherein the first hole wall structure can simultaneously act on two nuts of the self-locking nut to simultaneously disassemble and assemble the two nuts, and the second hole wall structure can independently act on a corresponding outer end nut of the self-locking nut to disassemble and assemble the outer end nut (upper nut).

Referring to fig. 3-5, the first hole wall structure includes a plurality of first grooves 21 adapted to the corners of the corresponding nuts, and the second hole wall structure includes a plurality of second grooves 22 adapted to the corners of the corresponding nuts, wherein the first grooves 21 have a first length L1 along the axial direction of the sleeve body 10, the second grooves 22 have a second length L2 along the axial direction of the sleeve body 10, and the first length L1 is greater than the second length L2. Specifically, the present embodiment is illustrated by taking a sleeve structure suitable for a hexagonal nut as an example, in the present embodiment, there are six first grooves 21 of the first hole wall structure, which are respectively and uniformly arranged along the circumferential direction of the inner hole 20 of the sleeve, and similarly, there are six second grooves 22 of the second hole wall structure, which are also respectively and uniformly arranged along the circumferential direction of the inner hole 20 of the sleeve, and more specifically, for facilitating the processing and the switching between the first hole wall structure and the second hole wall structure of the inner hole 20 of the sleeve, the plurality of second grooves 22 and the plurality of first grooves 21 are sequentially and alternately arranged along the circumferential direction of the inner hole 20. The radial cross section of the first hole wall structure and the radial cross section of the second hole wall structure are both hexagonal. Of course, it is contemplated that the radial cross-section of the first bore wall structure and the radial cross-section of the second bore wall structure are not limited to hexagonal shapes and may be configured in various patterns, such as rectangular or other polygonal shapes, according to conventional nuts.

In this embodiment, the second length L2 of the second groove 22 can be selected according to the thicknesses of nuts of different specifications, wherein the second length L2 is not greater than the thickness of a single nut (upper nut), preferably the second length L2 is consistent with the thickness of a single nut, so as to avoid interference with another nut (lower nut) located below due to the fact that the second length L2 is too long, and further facilitate the sleeve to be directly sleeved on the corresponding single nut for rotation operation, thereby improving the disassembly and assembly efficiency; accordingly, the first length L1 of the first groove should be greater than the thickness of a single nut (upper nut), and should be such that the whole upper nut (upper nut) and at least part of the lower nut (lower nut) of the self-locking nut are received in the inner hole 20 of the sleeve, so as to satisfy the simultaneous dismounting operation of the two nuts through the first hole wall structure of the sleeve, in this embodiment, the first length L1 of the first groove is preferably: the first length L1 is slightly greater than the sum of the thicknesses of the two nuts to facilitate the two nuts being fully received in the internal bore 20 of the sleeve after the upper nut is loosened relative to the lower nut.

In addition, the self-locking nut is usually provided with lubricating oil in the assembling and disassembling environment, so that the sleeve is prevented from sliding off when being taken, and the outer peripheral wall of the sleeve body 10 is further provided with anti-skidding threads 30, which are detailed in fig. 1. In order to facilitate the sliding of the sleeve into the inner bore 20 of the sleeve when the sleeve is aligned with the nut, and thus to improve the efficiency of the assembly and disassembly, the edge of the inner bore 20 is further provided with a chamfer 23, as shown in fig. 4 and 5.

The use process of the special sleeve for the self-locking nut of the embodiment is as follows:

(1) installation process of self-locking nut

Firstly, preliminarily placing a lower nut and an upper nut of a self-locking nut on a screw rod (a screw);

secondly, selecting a first hole wall structure of the sleeve to be sleeved on the two nuts, then acting on the two nuts by rotating the socket wrench, screwing the two nuts downwards to a set position simultaneously, and pressing a workpiece to be fastened, wherein the first groove 21 of the first hole wall structure of the embodiment is long in length, so that the requirement of simultaneously sleeving the two nuts can be met;

and thirdly, switching to a second hole wall structure of the sleeve to enable the second hole wall structure to be separately sleeved on the upper nut, continuing to rotate the socket wrench to enable the upper nut to be screwed downwards and act on the lower nut below, enabling the upper nut to reach the specified optimal locking torque, effectively locking the lower nut, and completing installation, wherein the second groove 22 of the second hole wall structure is slightly short (matched with the thickness of the upper nut), so that the second groove can be conveniently and quickly sleeved on the upper nut.

(2) Process for disassembling self-locking nut

Firstly, selecting a second hole wall structure of a sleeve to be sleeved on an upper nut above, so that the second hole wall structure of the sleeve is separately sleeved on the upper nut, and rotates to an initial position along the loosening direction of the upper nut to loosen and separate the upper nut from a lower nut below;

and secondly, when the upper nut rotates to the initial position, the edge angle of the upper nut is aligned with the edge angle of the lower nut in the up-down direction, then the first hole wall structure of the sleeve is switched, so that the first hole wall structure of the sleeve is simultaneously sleeved on the upper nut and the lower nut of the self-locking nut, and the two nuts are detached together along the loosening direction.

Claims (7)

1. Special sleeve of auto-lock nut is equipped with sleeve body (10) of hole (20) including its first end (11), and this hole (20) and the nut phase-match that corresponds are used for to above-mentioned nut transmission torsion, its characterized in that: the wall surface of the inner hole (20) is set into a first hole wall structure which can act on two nuts of the self-locking nut at the same time and a second hole wall structure which can act on the corresponding outer end nut of the self-locking nut independently.

2. The special sleeve for the self-locking nut of claim 1, wherein: the first hole wall structure comprises a plurality of first grooves (21) matched with edges and corners of corresponding nuts, the second hole wall structure comprises a plurality of second grooves (22) matched with edges and corners of corresponding nuts, the first grooves (21) are of a first length (L1) along the axial direction of the sleeve body (10), the second grooves (22) are of a second length (L2) along the axial direction of the sleeve body (10), and the first length (L1) is larger than the second length (L2).

3. The special sleeve for the self-locking nut of claim 2, wherein: the second grooves (22) and the first grooves (21) are arranged in a staggered mode in sequence along the circumferential direction of the inner hole (20).

4. The special sleeve for the self-locking nut of claim 2, wherein: the radial cross section of the first hole wall structure and the radial cross section of the second hole wall structure are both hexagonal.

5. The special sleeve for the self-locking nut according to any one of claims 1 to 4, wherein: the anti-skidding thread (30) is further arranged on the peripheral wall of the sleeve body (10).

6. The special sleeve for the self-locking nut according to any one of claims 1 to 4, wherein: the socket further comprises a mounting hole (13) which is arranged at the second end (12) of the socket body (10) and is used for being connected with the driving end of the socket wrench.

7. The special sleeve for the self-locking nut according to any one of claims 1 to 4, wherein: the edge of the inner hole (20) is also provided with a chamfer (23).

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