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CN-224214550-U - Staggered joint meshed locknut

CN224214550UCN 224214550 UCN224214550 UCN 224214550UCN-224214550-U

Abstract

The utility model belongs to the technical field of nuts, and particularly relates to a staggered joint meshed locknut which comprises a nut component, a screw rod, an upper fastening plate and a lower fastening plate, wherein the screw rod penetrates through the upper fastening plate and the lower fastening plate to be connected with the nut component pressed on the surface of the upper fastening plate, and an eccentric pushing mechanism is arranged between the gasket ring and the bottom surface of the lower nut. According to the self-locking nut, the upper occlusion teeth and the lower occlusion teeth on the nut assembly realize self-locking function after occlusion through the matched use of the nut assembly and the eccentric pushing mechanism, so that the upper nut and the lower nut form rotation stress linkage. Meanwhile, the eccentric pushing mechanism can circumferentially push the lower nut through the cooperation of the eccentric groove and the eccentric pushing convex ring, so that the threaded extrusion force between the lower nut and the screw rod is enhanced, and the staggered extrusion force of the upper occlusion teeth and the lower occlusion teeth is increased. The triple locking effect is realized by the structural design, and the shockproof and anti-loose performance is remarkably improved.

Inventors

  • CHENG QIANG
  • XU JIAN
  • WANG XUCHAO
  • YANG YANG
  • LIU YONGTAO
  • Cui Wenya

Assignees

  • 喜闻乐见建工集团有限公司

Dates

Publication Date
20260508
Application Date
20250626

Claims (6)

  1. 1. The staggered joint meshed locknut is characterized by comprising a nut component, a screw rod (4), an upper fastening plate (5) and a lower fastening plate (6), wherein the screw rod (4) penetrates through the upper fastening plate (5) and the lower fastening plate (6) to be connected with the nut component pressed on the surface of the upper fastening plate (5); The nut assembly comprises an upper nut (1), a lower nut (2) and a backing ring (3), wherein a plurality of upper engaging teeth (11) which are distributed at 7.5 degrees in a circumferential interval are fixedly arranged on the bottom surface of the upper nut (1) by taking the center of the upper nut (1) as the center of a circle, a plurality of lower engaging teeth (21) which are distributed at 7.5 degrees in a circumferential interval by taking the center of the lower nut (2) as the center of a circle are fixedly arranged on the surface of the lower nut (2), inclined planes (1.1) which are symmetrical up and down are arranged on the opposite surfaces of the upper engaging teeth (11) and the lower engaging teeth (21) mutually, and the upper engaging teeth (11) are matched with the adjacent two lower engaging teeth (21) in an embedded manner; the backing ring (3) is arranged on the bottom surface of the lower nut (2), and an eccentric pushing mechanism is arranged between the backing ring and the lower nut.
  2. 2. The staggered joint occlusion type locknut of claim 1, wherein the eccentric pushing mechanism comprises an eccentric groove (22) and a eccentric pushing convex ring (31), the eccentric pushing convex ring (31) is in plug-in fit with the eccentric groove (22), the eccentric groove (22) is formed in the bottom surface of the lower nut (2), the eccentric pushing convex ring (31) is integrally fixedly arranged on the surface of the backing ring (3), and the eccentric pushing convex ring (31) and the backing ring (3) are movably sleeved on the screw rod (4).
  3. 3. The staggered joint occlusion locknut of claim 2, wherein a plurality of conical teeth (32) which are uniformly distributed in a circumference with the backing ring (3) as a circle center are integrally and fixedly arranged on the bottom surface of the backing ring (3), and the conical teeth (32) are abutted against the surface of the upper fastening plate (5).
  4. 4. A split joint bite locknut according to claim 3, wherein the inclined surfaces (1.1) on the upper bite teeth (11) and the lower bite teeth (21) are inclined at an angle of between 5 and 7 °.
  5. 5. A split joint bite locknut according to claim 4, wherein the eccentric gap between the eccentric groove (22) and the outer diameter of the biasing collar (31) is set between 3-15 mm.
  6. 6. A split bite locknut according to claim 5, wherein the depth of the eccentric groove (22) is set to 1.5 times the height of the biasing collar (31), and the height of the biasing collar (31) is set to one third of the height of the lower nut (2).

Description

Staggered joint meshed locknut Technical Field The utility model belongs to the technical field of nuts, and particularly relates to a staggered joint meshed locknut. Background In the field of mechanical connection, nuts are one of the most commonly used fasteners, and the anti-loosening performance of the nuts is directly related to the safety and reliability of equipment operation. The traditional locknut adopts a double-nut structure or an elastic washer is added to improve the locking effect, but the locknut still has obvious defects in practical application. Particularly, for the working condition of bearing severe vibration or alternating load, the existing locknut is easy to loose after long-time use. The reason for the analysis is mainly that the traditional double-nut structure only depends on simple screw pre-tightening force superposition and lacks an effective occlusion locking mechanism, and the elastic washer is easy to lose elasticity due to material fatigue, so that the anti-loosening performance is reduced. Therefore, the utility model provides a staggered joint occlusion type locknut to solve the technical problems. Disclosure of utility model The utility model aims to provide a staggered joint occlusion type locknut, which can solve the technical problems. The technical scheme adopted by the utility model is as follows: The utility model provides a staggered joint occlusion type locknut which comprises a nut component, a screw rod, an upper fastening plate and a lower fastening plate, wherein the screw rod penetrates through the upper fastening plate and the lower fastening plate to be connected with the nut component pressed on the surface of the upper fastening plate; the nut assembly comprises an upper nut, a lower nut and a backing ring, wherein a plurality of upper engaging teeth which are distributed at 7.5-degree intervals circumferentially with the center of the upper nut as the center of the circle are fixedly arranged on the bottom surface of the upper nut, a plurality of lower engaging teeth which are distributed at 7.5-degree intervals circumferentially with the center of the lower nut as the center of the circle are fixedly arranged on the surface of the lower nut, inclined planes which are mutually symmetrical up and down are arranged on the opposite surfaces of the upper engaging teeth and the lower engaging teeth, and the upper engaging teeth are matched with the adjacent two lower engaging teeth in an embedded manner; the backing ring is arranged on the bottom surface of the lower nut, and an eccentric pushing mechanism is arranged between the backing ring and the lower nut. Preferably, the eccentric pushing mechanism comprises an eccentric groove and an eccentric convex ring, the eccentric convex ring is in plug-in fit with the eccentric groove, the eccentric groove is formed in the bottom surface of the lower nut, the eccentric convex ring is integrally fixedly arranged on the surface of the backing ring, and the eccentric convex ring and the backing ring are movably sleeved on the screw rod. Preferably, the bottom surface of the backing ring is integrally and fixedly provided with a plurality of conical teeth which are uniformly distributed in a circumference with the backing ring as a circle center, and the conical teeth are abutted against the surface of the upper fastening plate. Preferably, the inclined planes on the upper and lower incisors are inclined at an angle of 5-7 °. Preferably, the eccentric gap between the eccentric groove and the outer diameter of the eccentric pushing convex ring is between 3 and 15 mm. Preferably, the depth of the eccentric groove is set to 1.5 times the height of the biasing collar, which is set to one third of the height of the lower nut. The beneficial effects are as follows: According to the self-locking nut, the upper occlusion teeth and the lower occlusion teeth on the nut assembly realize self-locking function after occlusion through the matched use of the nut assembly and the eccentric pushing mechanism, so that the upper nut and the lower nut form rotation stress linkage. Meanwhile, the eccentric pushing mechanism can circumferentially push the lower nut through the cooperation of the eccentric groove and the eccentric pushing convex ring, so that the threaded extrusion force between the lower nut and the screw rod is enhanced, and the staggered extrusion force of the upper occlusion teeth and the lower occlusion teeth is increased. The triple locking effect is realized by the structural design, and the shockproof and anti-loose performance is remarkably improved. Drawings FIG. 1 is a schematic diagram of the front view of the present utility model after installation; FIG. 2 is a schematic view of the nut assembly of the present utility model in a disengaged condition; FIG. 3 is a schematic view of the nut assembly of the present utility model in a separated state, obliquely looking up; fig. 4 is a schematic cross-sectional