CN110848233A

CN110848233A - Staggered thread type locknut

Info

Publication number: CN110848233A
Application number: CN201911243762.3A
Authority: CN
Inventors: 彭宝安
Original assignee: Jingmen Baisi Machinery Technology Co Ltd
Current assignee: Jingmen Baisi Machinery Technology Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-02-28

Abstract

The invention discloses a staggered thread type locknut which is mainly used in the field of machinery; it has the interlocking function, and is convenient to manufacture and use; it is composed of a nut A and a nut B; the working principle is as follows: the nut B is screwed on the bolt firstly, then the extrusion part of the nut A is screwed on the bolt downwards, in the process of screwing the nut A, because the tooth pitch and the tooth form angle of the internal thread section of the extrusion part of the nut A are different from the tooth pitch and the tooth form angle of the external thread section of the nut B, a plurality of internal thread sections of the nut A and a plurality of external thread sections of the nut B are mutually extruded and occluded together, meanwhile, the lower end of the nut A tightly props against a workpiece, the nut A and the nut B are interlocked, meanwhile, the extrusion part of the nut A extrudes a plurality of arc sections, the internal thread B of the arc sections also extrudes the external thread of the bolt, and the external thread of the bolt is tightly hooped, so that the friction force between the internal thread B of the arc sections and the external thread of the bolt is greatly increased, and the purpose of preventing looseness is achieved.

Description

Staggered thread type 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 a plurality of internal thread sections (4), wherein the screw body A (2) is provided with internal threads A (5), the internal threads A (5) are matched with external threads of a bolt (11), 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 upper part and a large lower part, and the inner side surface of the conical ring is provided with the plurality of horizontal internal thread sections (4); the nut B (6) consists of a nut body B (7) and external thread sections (10), the nut body B (7) is in a truncated cone shape with a small top and a big bottom, a through hole is arranged in the middle, internal threads B (8) are arranged on the inner wall of the through hole, the internal threads B (8) are matched with external threads of a bolt (11), a plurality of horizontal external thread sections (10) are arranged on the outer side surface of the nut body B (7), a plurality of uniformly distributed grooves (9) are machined in the nut body B (7), the openings of the grooves (9) are upward, the nut body B (7) is divided into a plurality of circular arc sections (13) by the grooves (9), the circular arc sections (13) are also provided with a plurality of horizontal external thread sections (10), the lower parts of the grooves (9) of the nut body B (7) are integral bottoms, the inclination of the inner side surface of the extrusion part (3) of the nut A (1) is larger than that of the outer side surface of the nut body B (7) of the nut B (6), a plurality of internal thread sections (4) of the nut A (1) and a plurality of external thread The pitch and the profile angle of the internal thread section (4) are different from those of the external thread section (10); the working principle of the locknut is as follows: firstly, a nut B (6) is screwed on a bolt (11) and the lower end of the nut B (6) is pressed against a workpiece (12), the small face of the truncated cone shape faces upwards, then an extrusion part (3) of the nut A (1) is screwed on the bolt (11) downwards, in the process of screwing the nut A (1), because the tooth pitch and the tooth form angle of an internal thread section (4) of the extrusion part (3) of the nut A (1) are different from those of an external thread section (10) of the nut B (6), a plurality of internal thread sections (4) of the nut A (1) and a plurality of external thread sections (10) of the nut B (6) are mutually extruded and occluded together, meanwhile, the lower end of the nut A (1) is tightly pressed against the workpiece (12), the nut B (6) is completely wrapped in the extrusion part (3) of the nut A (1), the nut A (1) and the nut B (6) are interlocked, and simultaneously, because the inclination of the inner side face of the extrusion part (3) of the nut A (1) is more inclined than that of the nut B (6), the nut B (7) is more tightly wrapped in the nut B The inclination of the side is large, the extrusion part (3) of the nut A (1) extrudes the plurality of arc sections (13) of the nut B (6), the internal threads B (8) of the plurality of arc sections (13) extrude the external threads of the bolt (11) again, and the external threads of the bolt (11) are tightly hooped, so that the friction force between the internal threads B (8) of the plurality of arc sections (13) and the external threads of the bolt (11) is greatly increased, and the purpose of preventing looseness is achieved; under the action of vibration load, the fixed workpiece (12) firstly loosens the nut A (1), the plurality of external thread sections (10) of the nut B (6) constrain the plurality of internal thread sections (4) of the nut A (1) to prevent the nut A (1) from loosening, the nut A (1) which is not loosened tightly hoops the nut B (6) to ensure that the nut B (6) is not loosened, and the purpose of looseness prevention is realized through interaction and mutual restriction.

Drawings

Description of reference numerals: 1-nut A, 2-screw body A, 3-extrusion part, 4-internal thread section, 5-internal thread A, 6-nut B, 7-screw body B, 8-internal thread B, 9-groove, 10-external thread section, 11-bolt, 12-workpiece and 13-circular arc section.

Fig. 1 is a vertical sectional view of the nut a.

Fig. 2 is a vertical sectional view of the nut B.

Fig. 3 is a plan view of the nut B.

Fig. 4 is an assembly diagram of the nut a, the nut B, and the bolt.

Detailed Description

Referring to fig. 1 to 4, firstly, a nut B6 is screwed on a bolt 11, the lower end of the nut B6 is pressed against a workpiece 12, the small face of the truncated cone shape faces upward, then, an extrusion part 3 of the nut a1 is screwed on the bolt 11 downward, during the screwing process of the nut a1, as the pitch and the profile angle of the internal thread section 4 of the extrusion part 3 of the nut a1 are different from those of the external thread section 10 of the nut B6, a plurality of internal thread sections 4 of the nut a1 and a plurality of external thread sections 10 of the nut B6 are mutually pressed and engaged together, simultaneously, the lower end of the nut a1 is pressed against the workpiece 12, the nut B6 is completely wrapped in the extrusion part 3 of the nut a1, the nut a1 and the nut B6 are interlocked, simultaneously, as the inclination of the inner side face of the extrusion part 3 of the nut a1 is larger than the inclination of the outer side of the body B8 of the nut B6, the extrusion part 3 of the nut a1 extrudes a plurality of the internal thread sections B68692, and the plurality of the external thread sections of the bolt B8 extrude the plurality of the arc, the external thread of the bolt 11 is tightly hooped, so that the friction force between the internal thread B8 of the arc sections 13 and the external thread of the bolt 11 is greatly increased, and the purpose of preventing looseness is achieved; under the action of vibration load, the fixed workpiece 12 is loosened firstly by the nut A1, the plurality of external thread sections 10 of the nut B6 constrain the plurality of internal thread sections 4 of the nut A1 to prevent the nut A1 from loosening, the unreleased nut A1 tightly hoops the nut B6 to prevent the nut B6 from loosening, and the purpose of loosening prevention is realized by interaction and mutual restriction; need to explain: the process is carried out simultaneously when the plurality of internal thread sections 4 of the nut A1 and the plurality of external thread sections 10 of the nut B6 are mutually pressed and meshed, the pressing part 3 of the nut A1 presses the plurality of arc sections 13 of the nut B6, and the internal threads B8 of the plurality of arc sections 13 press the external threads of the bolt 11, and the process is not finished until the lower end of the nut A1 tightly presses the workpiece 12.

Claims

1. The utility model provides a wrong tooth formula locknut of screw thread which 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 a plurality of internal thread sections (4), wherein the screw body A (2) is provided with internal threads A (5), the internal threads A (5) are matched with external threads of a bolt (11), 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 upper part and a large lower part, and the inner side surface of the conical ring is provided with the plurality of horizontal internal thread sections (4); the nut B (6) consists of a nut body B (7) and external thread sections (10), the nut body B (7) is in a truncated cone shape with a small top and a big bottom, a through hole is arranged in the middle, internal threads B (8) are arranged on the inner wall of the through hole, the internal threads B (8) are matched with external threads of a bolt (11), a plurality of horizontal external thread sections (10) are arranged on the outer side surface of the nut body B (7), a plurality of uniformly distributed grooves (9) are machined in the nut body B (7), the openings of the grooves (9) are upward, the nut body B (7) is divided into a plurality of circular arc sections (13) by the grooves (9), the circular arc sections (13) are also provided with a plurality of horizontal external thread sections (10), the lower parts of the grooves (9) of the nut body B (7) are integral bottoms, the inclination of the inner side surface of the extrusion part (3) of the nut A (1) is larger than that of the outer side surface of the nut body B (7) of the nut B (6), a plurality of internal thread sections (4) of the nut A (1) and a plurality of external thread The pitch and the profile angle of the internal thread section (4) are different from those of the external thread section (10); the working principle of the locknut is as follows: firstly, a nut B (6) is screwed on a bolt (11) and the lower end of the nut B (6) is pressed against a workpiece (12), the small face of the truncated cone shape faces upwards, then an extrusion part (3) of the nut A (1) is screwed on the bolt (11) downwards, in the process of screwing the nut A (1), because the tooth pitch and the tooth form angle of an internal thread section (4) of the extrusion part (3) of the nut A (1) are different from those of an external thread section (10) of the nut B (6), a plurality of internal thread sections (4) of the nut A (1) and a plurality of external thread sections (10) of the nut B (6) are mutually extruded and occluded together, meanwhile, the lower end of the nut A (1) is tightly pressed against the workpiece (12), the nut B (6) is completely wrapped in the extrusion part (3) of the nut A (1), the nut A (1) and the nut B (6) are interlocked, and simultaneously, because the inclination of the inner side face of the extrusion part (3) of the nut A (1) is more inclined than that of the nut B (6), the nut B (7) is more tightly wrapped in the nut B The inclination of the side is large, the extrusion part (3) of the nut A (1) extrudes the plurality of arc sections (13) of the nut B (6), the internal threads B (8) of the plurality of arc sections (13) extrude the external threads of the bolt (11) again, and the external threads of the bolt (11) are tightly hooped, so that the friction force between the internal threads B (8) of the plurality of arc sections (13) and the external threads of the bolt (11) is greatly increased, and the purpose of preventing looseness is achieved; under the action of vibration load, the fixed workpiece (12) firstly loosens the nut A (1), the plurality of external thread sections (10) of the nut B (6) constrain the plurality of internal thread sections (4) of the nut A (1) to prevent the nut A (1) from loosening, the nut A (1) which is not loosened tightly hoops the nut B (6) to ensure that the nut B (6) is not loosened, and the purpose of looseness prevention is realized through interaction and mutual restriction.