CN108730313B

CN108730313B - Interlocking locknut

Info

Publication number: CN108730313B
Application number: CN201810613767.XA
Authority: CN
Inventors: 丁立芳; 彭宝安
Original assignee: Jingmen Chuangjia Machinery Technology Co Ltd
Current assignee: Zhejiang Rongxin Strip Steel Co ltd
Priority date: 2018-06-14
Filing date: 2018-06-14
Publication date: 2020-05-22
Anticipated expiration: 2038-06-14
Also published as: CN108730313A

Abstract

The invention discloses an interlocking locknut which is mainly used in the field of machinery; the interlocking function is realized, the tightened nut cannot be loosened from the bolt, and the interlocking nut is convenient to manufacture and use; it is composed of a nut A and a nut B; the working principle and the installation process are as follows: firstly, screwing the clamping part of the nut B upwards on the bolt and enabling the lower end of the nut B to tightly press a workpiece, then screwing the extrusion part of the nut A downwards on the bolt and tightly pushing the clamping part of the nut B, extruding a plurality of clamping pieces of the nut B by a plurality of convex ribs of the extrusion part of the nut A, extruding external threads of the bolt by internal threads B of the plurality of clamping pieces, tightly hooping the external threads of the bolt to achieve the purpose of preventing looseness, and at least one convex rib is clamped into a groove of the nut B in the process to realize interlocking; under the effect of vibration load, nut A is not hard up earlier, and the fin of card income nut B's inslot prevents nut A not hard up again, and the external screw thread of bolt is being held to a plurality of fins tightly simultaneously, has realized locking purpose.

Description

Interlocking locknut

Technical Field

The invention is mainly used for fixing components in the mechanical field or the building field, and is particularly suitable for fixing components which frequently vibrate.

Background

The currently used or patented locknuts cannot be interlocked, and finally the nuts are loosened from the bolts; some nuts have the function of anti-loosening and locking, but need to be additionally provided with accessories, and are inconvenient to manufacture and use.

Disclosure of Invention

The interlocking nut solves the problems, has an interlocking function, can not be loosened from a bolt after being screwed, does not need to add extra accessories, and is convenient to manufacture and use; it is composed of a nut A (1) and a nut B (6); the nut A (1) is composed of a screw body A (2), an extrusion part (3) and convex ribs (4), wherein the screw body A (2) is provided with an internal thread A (5), the internal thread A (5) is matched with an external thread of a bolt, the lower end of the screw body A (2) is the extrusion part (3), the extrusion part (3) is a conical ring with a small top and a big bottom, the inner side surface of the conical ring is provided with a plurality of strip-shaped convex ribs (4), the distribution of the strip-shaped convex ribs (4) on the inner side surface of the conical ring is different, and the lower end of the extrusion part (3) is provided with a straight section A (10); the nut B (6) consists of a screw body B (7) and a clamping part (8), the clamping part (8) is arranged at the upper end of the screw body B (7), a circle of arc-shaped groove (12) is formed in the upper end of the screw body B (7), a plurality of uniformly distributed grooves (9) are processed in the clamping part (8), the number of the grooves (9) is four or more than even, clamping pieces (13) are formed between every two adjacent grooves (9), a straight section B (11) is arranged at the upper end of each clamping piece (13), internal threads B (14) are formed in the screw body B (7) and the clamping part (8), and the internal threads B (14) are matched with external threads of a bolt; the interlocking locknut has the working principle that: firstly, explaining the arrangement of A plurality of strip-shaped convex ribs (4), assuming that the number of the clamping pieces (13) is N, N is an even number, the number of the grooves (9) is N, the width of the grooves (9) is A, the radius of A virtual circle (16) of the central point of the outer side surface of A conical ring formed by the clamping pieces (13) is R, the arc length of the central point of each clamping piece (13) is C, C =2 pi R/N-A, assuming that M convex ribs (4) are arranged in the range of the inner side surface of the conical ring of the extrusion part (3) of the nut A (1) corresponding to the arc length C of the clamping pieces (13), the virtual circle radius of the central point of the inner side surface of the conical ring of the extrusion part (3) of the nut A (1) is R', the distance between the central axes of the adjacent convex ribs (4) is B when the nut A (1) and the nut B (6) are machined, B = C/M, dividing the projection circle of the inner side surface of the conical ring of the extrusion part (3) of the nut A (1) into 4), namely a first quadrant, a second quadrant, a third quadrant and a fourth quadrant of a plane coordinate system, in the fourth quadrant, as the number of the grooves (9) is even, at least two grooves (9) are aligned with an X axis or a Y axis, it is assumed that one groove (9) is aligned with the Y axis, the central axis of the upmost convex rib (4) is aligned with the Y axis, and the rest convex ribs (4) are uniformly arranged in the fourth quadrant according to the central axis distance B; in the first quadrant, the central axis of the upmost convex rib (4) deviates from the Y axis by a distance of one half B, and the rest convex ribs (4) are uniformly arranged in the first quadrant according to the central axis distance B; in a second quadrant, the central axis of the convex rib (4) at the rightmost end deviates a distance of one fourth B of the X axis, and the rest convex ribs (4) are uniformly arranged in the second quadrant according to the central axis distance B; in a third quadrant, the central axis of the convex rib (4) at the lowest end deviates a distance B which is one eighth of the Y axis, and the rest convex ribs (4) are uniformly arranged in the third quadrant according to the central axis distance B; the installation process of the nut is as follows: firstly, a clamping part (8) of a nut B (6) is screwed up on a bolt, the lower end of the nut B (6) is pressed tightly on a workpiece, then an extrusion part (3) of a nut A (1) is screwed down on the bolt and props against the clamping part (8) of the nut B (6), a plurality of clamping pieces (13) of the nut B (6) are extruded by a plurality of convex ribs (4) of the extrusion part (3) of the nut A (1), and internal threads B (14) of the clamping pieces (13) extrude external threads of the bolt to tightly clamp the external threads of the bolt, so that the friction force between the internal threads B (14) of the clamping pieces (13) and the external threads of the bolt is greatly increased, and the purpose of preventing looseness is achieved; if the upmost convex rib (4) of the nut A (1) is just aligned with the upmost groove (9) of the nut B (6), at least one convex rib (4) is clamped in the groove (9) of the nut B (6) to realize interlocking; if the uppermost convex rib (4) of the nut A (1) is not aligned with the uppermost groove (9) of the nut B (6), continuing to rotate the nut A (1) clockwise by an eighth B distance or a quarter B distance or a half B distance, and at least one convex rib (4) is clamped into the groove (9) of the nut B (6) to realize interlocking; after the nut A (1) and the nut B (6) are interlocked, under the action of vibration load, the nut A (1) is firstly loosened, the convex ribs (4) of the nut A (1) clamped into the grooves (9) of the nut B (6) prevent the nut A (1) from loosening, meanwhile, the convex ribs (4) of the extrusion part (3) of the nut A (1) tightly hoop the external threads of the bolt, and the purpose of looseness prevention is achieved through interaction and mutual restriction.

Drawings

Description of reference numerals: 1-nut A, 2-body A, 3-extrusion part, 4-rib, 5-internal thread A, 6-nut B, 7-body B, 8-clamping part, 9-groove, 10-straight section A, 11-straight section B, 12-arc groove, 13-clamping piece, 14-internal thread B, 15-virtual circle of inner side surface center point of cone ring of extrusion part (3) of nut A (1), 16-virtual circle.

Fig. 1 is a vertical sectional view of a nut a and a nut B.

Fig. 2 is a plan view of the nut B.

Fig. 3 is a distribution diagram of the convex ribs of the nut a in the fourth quadrant of the plane coordinate system.

Fig. 4 is a distribution diagram of the ribs of the nut a in the first quadrant of the planar coordinate system.

Fig. 5 is a distribution diagram of the ribs of the nut a in the second quadrant of the planar coordinate system.

Fig. 6 is a distribution diagram of the convex ribs of the nut a in the third quadrant of the plane coordinate system.

Fig. 7 is a bottom view of the nut a.

Fig. 8 is a partially enlarged view of the distribution of the ribs of the nut a.

Fig. 9 is a view showing that the rib of the nut a is caught in the groove of the nut B.

Detailed Description

Referring to fig. 1 to 9, first, the arrangement of the plurality of strip-shaped ribs 4 is described, assuming that the number of the clips 13 is N, N is an even number, the number of the grooves 9 is N, the width of the groove 9 is A, the radius of A virtual circle 16 of the center point of the outer side surface of the conical ring formed by the plurality of clips 13 is R, the arc length of the center point of each clip 13 is C, C = 2R/N-A, and assuming that M ribs 4 are arranged in A range where the inner side surface of the conical ring of the extrusion part 3 of the nut A1 corresponds to the arc length C of the clip 13, the virtual circle radius of the center point of the inner side surface of the conical ring of the extrusion part 3 of the nut A1 is R ', R = R' when the nut A1 and the nut B6 are machined, and the distance between the center axes of the adjacent ribs 4 is B, B = C/M, the projected circle of the inner side surface of the conical ring of the extrusion part 3 of the nut A1 is divided, namely, a first quadrant, a second quadrant, a third quadrant and a fourth quadrant of a plane coordinate system, in the fourth quadrant, as the number of the grooves 9 is even, at least two grooves 9 are aligned with an X axis or a Y axis, it is assumed that one groove 9 is aligned with the Y axis, the central axis of the convex rib 4 at the uppermost end is aligned with the Y axis, and the rest convex ribs 4 are uniformly arranged in the fourth quadrant according to the central axis distance B; in the first quadrant, the central axis of the upmost convex rib 4 deviates from the Y axis by a distance of one half B, and the rest convex ribs 4 are uniformly arranged in the first quadrant according to the central axis distance B; in a second quadrant, the central axis of the convex rib 4 at the rightmost end deviates a distance of one fourth B of the X axis, and the rest convex ribs 4 are uniformly arranged in the second quadrant according to the central axis distance B; in the third quadrant, the central axis of the convex rib 4 at the lowest end deviates from the Y axis by a distance of one eighth B, and the rest convex ribs 4 are uniformly arranged in the third quadrant according to the central axis distance B; the installation process of the nut is as follows: firstly, the clamping part 8 of the nut B6 is screwed on the bolt upwards, the lower end of the nut B6 is pressed against a workpiece, then the extrusion part 3 of the nut A1 is screwed on the bolt downwards and props against the clamping part 8 of the nut B6, the plurality of convex ribs 4 of the extrusion part 3 of the nut A1 extrude the plurality of clamping pieces 13 of the nut B6, the internal threads B14 of the plurality of clamping pieces 13 extrude the external threads of the bolt, and the external threads of the bolt are tightly hooped, so that the friction force between the internal threads B14 of the plurality of clamping pieces 13 and the external threads of the bolt is greatly increased, and the purpose of preventing loosening is achieved; if the uppermost rib 4 of nut a1 is aligned with the uppermost slot 9 of nut B6, then at least one rib 4 snaps into slot 9 of nut B6, thereby interlocking it; if the uppermost rib 4 of nut a1 is not aligned with the uppermost slot 9 of nut B6, then continuing to rotate nut a1 clockwise an eighth B distance or a quarter B distance or a half B distance, again with at least one rib 4 snapping into the slot 9 of nut B6, an interlock is achieved; after the nut A1 and the nut B6 are interlocked, under the action of vibration load, the nut A1 is firstly loosened, the convex ribs 4 of the nut A1 clamped in the groove 9 of the nut B6 prevent the nut A1 from loosening, and meanwhile, the plurality of convex ribs 4 of the extrusion part 3 of the nut A1 tightly hoop the external threads of the bolt, so that the aim of loosening prevention is achieved through interaction and mutual restriction; need to explain: the width of the groove 9 is 2 to 3 mm, and the width of the lower end of the rib 4 is 1.5 to 2.5 mm.

Claims

1. Locknut that can interlock, characterized by: it is composed of a nut A (1) and a nut B (6); the nut A (1) is composed of a screw body A (2), an extrusion part (3) and convex ribs (4), wherein the screw body A (2) is provided with an internal thread A (5), the internal thread A (5) is matched with an external thread of a bolt, the lower end of the screw body A (2) is the extrusion part (3), the extrusion part (3) is a conical ring with a small top and a big bottom, the inner side surface of the conical ring is provided with a plurality of strip-shaped convex ribs (4), the distribution of the strip-shaped convex ribs (4) on the inner side surface of the conical ring is different, and the lower end of the extrusion part (3) is provided with a straight section A (10); the nut B (6) consists of a screw body B (7) and a clamping part (8), the clamping part (8) is arranged at the upper end of the screw body B (7), a circle of arc-shaped groove (12) is formed in the upper end of the screw body B (7), a plurality of uniformly distributed grooves (9) are processed in the clamping part (8), the number of the grooves (9) is four or more than even, clamping pieces (13) are formed between every two adjacent grooves (9), a straight section B (11) is arranged at the upper end of each clamping piece (13), internal threads B (14) are formed in the screw body B (7) and the clamping part (8), and the internal threads B (14) are matched with external threads of a bolt; the interlocking locknut has the working principle that: firstly, explaining the arrangement of A plurality of strip-shaped convex ribs (4), if the number of the clamping sheets (13) is N, the N is an even number, the number of the grooves (9) is N, the width of the grooves (9) is A, the radius of A virtual circle (16) at the central point of the outer side surface of A conical ring formed by the clamping sheets (13) is R, the arc length of the central point of each clamping sheet (13) is C, then C =2 pi R/N-A, and if M convex ribs (4) are arranged in the range of the inner side surface of the conical ring of the extrusion part (3) of the nut A (1) corresponding to the arc length C of the clamping sheets (13), the virtual circle radius at the central point of the inner side surface of the conical ring of the extrusion part (3) of the nut A (1) is R', the distance between the central axes of the adjacent convex ribs (4) is B when the nut A (1) and the nut B (6) are machined, then B = C/M, dividing a projection circle of the inner side surface of a conical ring of an extrusion part (3) of a nut A (1) into 4 semicircles, namely a first quadrant, a second quadrant, a third quadrant and a fourth quadrant of a plane coordinate system, wherein in the fourth quadrant, because the number of grooves (9) is an even number, at least two grooves (9) are aligned with an X axis or a Y axis, and assuming that one groove (9) is aligned with the Y axis, the central axis of the upmost convex rib (4) is aligned with the Y axis, and the rest convex ribs (4) are uniformly arranged in the fourth quadrant according to the central axis distance B; in the first quadrant, the central axis of the upmost convex rib (4) deviates from the Y axis by a distance of one half B, and the rest convex ribs (4) are uniformly arranged in the first quadrant according to the central axis distance B; in a second quadrant, the central axis of the convex rib (4) at the rightmost end deviates a distance of one fourth B of the X axis, and the rest convex ribs (4) are uniformly arranged in the second quadrant according to the central axis distance B; in a third quadrant, the central axis of the convex rib (4) at the lowest end deviates a distance B which is one eighth of the Y axis, and the rest convex ribs (4) are uniformly arranged in the third quadrant according to the central axis distance B; the installation process of the nut is as follows: firstly, a clamping part (8) of a nut B (6) is screwed up on a bolt, the lower end of the nut B (6) is pressed tightly on a workpiece, then an extrusion part (3) of a nut A (1) is screwed down on the bolt and props against the clamping part (8) of the nut B (6), a plurality of clamping pieces (13) of the nut B (6) are extruded by a plurality of convex ribs (4) of the extrusion part (3) of the nut A (1), and internal threads B (14) of the clamping pieces (13) extrude external threads of the bolt to tightly clamp the external threads of the bolt, so that the friction force between the internal threads B (14) of the clamping pieces (13) and the external threads of the bolt is greatly increased, and the purpose of preventing looseness is achieved; if the upmost convex rib (4) of the nut A (1) is just aligned with the upmost groove (9) of the nut B (6), at least one convex rib (4) is clamped in the groove (9) of the nut B (6) to realize interlocking; if the uppermost convex rib (4) of the nut A (1) is not aligned with the uppermost groove (9) of the nut B (6), continuing to rotate the nut A (1) clockwise by an eighth B distance or a quarter B distance or a half B distance, and at least one convex rib (4) is clamped into the groove (9) of the nut B (6) to realize interlocking; after the nut A (1) and the nut B (6) are interlocked, under the action of vibration load, the nut A (1) is firstly loosened, the convex ribs (4) of the nut A (1) clamped into the grooves (9) of the nut B (6) prevent the nut A (1) from loosening, meanwhile, the convex ribs (4) of the extrusion part (3) of the nut A (1) tightly hoop the external threads of the bolt, and the purpose of looseness prevention is achieved through interaction and mutual restriction.