CN219911444U

CN219911444U - Combined anti-loosening fastener

Info

Publication number: CN219911444U
Application number: CN202321452680.1U
Authority: CN
Inventors: 燕存露
Original assignee: Huangshan Jianghuai Industry And Trade Co ltd
Current assignee: Huangshan Jianghuai Industry And Trade Co ltd
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-10-27
Anticipated expiration: 2033-06-07

Abstract

The utility model discloses a combined anti-loosening fastener which comprises a bolt and a nut which are in threaded connection with each other, wherein the bolt comprises a bolt head and a screw rod, the screw rod comprises a connecting section and an expansion section, the connecting section is arranged in a hollow mode, the expansion section comprises four groups of arc-shaped pieces which are circumferentially distributed, the middle of the bolt head is provided with a T-shaped fixing groove, the bottom of the fixing groove is communicated with the hollow connecting section, the inner sides of the fixing groove, the connecting section and the inner sides of the expansion section are provided with tightening pieces, the lower end face of the nut is provided with a plurality of protruding blocks which are circumferentially distributed, the tightening pieces are provided with fixing notches, limiting plates are inserted in the fixing notches, and the upper end face of each limiting plate is provided with grooves matched with the protruding blocks. The limiting plate is arranged, and the relative limiting of the nut and the bolt is realized through the matching of the groove of the limiting plate and the convex block on the nut, so that the anti-loosening performance is enhanced; on the other hand, the fixed slot is provided with a plurality of, cooperates and props tight piece and the spiro union of fixed slot, realizes the regulation of limiting plate, guarantees to be connected stably with the nut lower extreme.

Description

Combined anti-loosening fastener

Technical Field

The utility model relates to the technical field of bolt and nut fasteners, in particular to a combined anti-loosening fastener.

Background

The fastener is a mechanical part used when two or more parts or members are fastened and connected as a whole. Bolt-and-nut fasteners are one of the common fasteners. However, under the vibration working condition, the bolt and nut fastener is loosened. In order to solve the above problems, the existing chinese patent No. 202223140402.0 discloses a locking fastener, which is limited by an anti-loosening plate and a nut, so as to realize the relative connection stability of the bolt and the nut. However, the anti-loosening plate structure is lack of fixation, and is only suitable for working conditions that the rod part of the bolt faces upwards, and has use limitation.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a combined bolt and nut fastener which is stable in structure and can prevent loosening.

In order to achieve the purpose, the combined anti-loosening fastener adopts the following technical scheme:

the utility model provides a combination locking fastener, includes bolt and the nut of looks spiro union, the bolt includes bolt head and screw rod, the screw rod includes linkage segment and expansion section, the linkage segment cavity sets up, the expansion section is the circumference including four groups and lays the arc piece, linkage segment, expansion section periphery side all are provided with the screw thread that is connected with the nut, the fixed slot that is the T type has been seted up at bolt head middle part, and the tank bottom of fixed slot communicates in hollow linkage segment, and fixed slot, linkage segment inboard, expansion section inboard are provided with and prop tight piece, prop tight piece lower part and be used for strutting the expansion section, be provided with a plurality of lugs that circumference was laid on the nut lower terminal surface, prop tight piece on offered fixed breach, fixed breach interpolation is equipped with the limiting plate, be provided with on the limiting plate up end with lug matched with recess.

The utility model relates to a further improvement of a combined anti-loosening fastener, which is characterized in that a plurality of fixing notches are arranged and uniformly distributed along the length direction of a tightening piece.

The utility model relates to a further improvement of a combined anti-loosening fastener, which is characterized in that a fixing groove comprises an upper part and a vertical part, a thread is arranged on the wall of the upper part of the fixing groove, a supporting piece is also T-shaped and comprises a top part and a straight rod part, the top part of the supporting piece is also provided with a thread part, and the top part of the supporting piece is in threaded connection with the upper part of the fixing groove.

A further improvement of the combined anti-loosening fastener is that the top thickness of the tightening piece is smaller than the upper depth of the fixing groove.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the outer support of the expansion part of the bolt is realized by arranging the supporting piece, so that the expansion part is used for limiting the nut, the anti-loosening performance is improved, meanwhile, the limiting plate is arranged, and the relative limiting of the nut and the bolt is realized by matching the groove of the limiting plate with the convex block on the nut, so that the anti-loosening performance is enhanced; on the other hand, the fixed slot is provided with a plurality of, cooperates and props tight piece and the spiro union of fixed slot, realizes the regulation of limiting plate, guarantees to be connected stably with the nut lower extreme.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

in the figure: the device comprises a bolt head 1, a screw rod 2, a connecting section 21, an expansion section 22, a nut 3, a fixing groove 4, a supporting piece 5, a fixing notch 6 and a limiting plate 7.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in FIG. 1, a combination locking fastener, including bolt and nut 3 that looks spiro union, the bolt includes bolt head 1 and screw rod 2, the screw rod includes link 21 and expansion section 22, the link cavity sets up, the expansion section is the circumference including four groups and lays the arc piece, the link, expansion section periphery side all is provided with the screw thread that is connected with the nut, the fixed slot 4 that is the T type has been seted up at the bolt head middle part, the tank bottom of fixed slot communicates in hollow link, the fixed slot, the link is inboard, expansion section inboard is provided with and props tight piece 5, prop tight piece lower part and be used for strutting the expansion section, be provided with a plurality of lugs that circumference was laid on the nut lower terminal surface, prop up and offered fixed breach 6 on the tight piece, fixed breach interpolation is equipped with limiting plate 7, be provided with on the limiting plate up end with lug matched with recess.

Further, the fixing notch is provided with a plurality of, evenly lays along the length direction of the tightening piece. Namely, the position of the limiting plate can be adjusted, and the limiting plate is suitable for connected fastening objects with different thicknesses.

Further, the fixed slot includes upper portion and vertical portion, has offered the screw thread on the fixed slot upper portion cell wall, and the piece that props up also is the T type, including top and straight-bar portion, props up a top and also is provided with screw thread portion, props up a top and fixed slot upper portion looks spiro union. The top thickness of the tightening piece is smaller than the upper depth of the fixing groove. On the one hand, the stable connection of the tightening piece is realized, and on the other hand, the tightening piece is finely adjusted, so that the limiting plate and the nut are clamped and limited better.

The working principle of the utility model is as follows: the bolt passes by the connecting piece, connects the nut soon, later installs and prop tight piece for expansion part is abducted, and stop nut inserts the limiting plate, makes the recess on the limiting plate face to the lug on the nut, and the tight piece is propped up in the callback, makes limiting plate and nut block mutually, has wholly guaranteed locking performance.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A combination check fastener, characterized in that: including bolt and the nut of looks spiro union, the bolt includes bolt head and screw rod, the screw rod includes linkage segment and expansion section, the linkage segment cavity sets up, the expansion section is the circumference including four groups and lays the arc piece, linkage segment, expansion section periphery side all are provided with the screw thread that is connected with the nut, the fixed slot that is the T type is seted up at bolt head middle part, and the tank bottom of fixed slot communicates in hollow linkage segment, and fixed slot, linkage segment inboard, expansion section inboard are provided with and prop tight piece, prop tight piece lower part and be used for strutting the expansion section, be provided with a plurality of lugs that circumference was laid on the nut lower terminal surface, prop tight piece on offered fixed breach, fixed breach interpolation is equipped with the limiting plate, be provided with on the limiting plate up end with lug matched with recess.

2. A combination check fastener as claimed in claim 1 wherein: the fixed notch is provided with a plurality of, evenly lays along propping up a length direction.

3. A combination check fastener as claimed in claim 2 wherein: the fixed slot comprises an upper part and a vertical part, threads are formed on the wall of the upper part of the fixed slot, the tightening piece is also T-shaped and comprises a top and a straight rod part, the top of the tightening piece is also provided with a threaded part, and the top of the tightening piece is in threaded connection with the upper part of the fixed slot.

4. A combination check fastener as claimed in claim 3 wherein: the top thickness of the tightening piece is smaller than the upper depth of the fixing groove.