CN111779751A

CN111779751A - Locking bolt structure that moves

Info

Publication number: CN111779751A
Application number: CN202010647957.0A
Authority: CN
Inventors: 于明珠; 张凤君; 张忠; 赵中华
Original assignee: Hebei Beiqi Futian Auto Parts Co ltd
Current assignee: Hebei Beiqi Futian Auto Parts Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2020-10-16

Abstract

The invention provides a looseness-prevention bolt structure which comprises a bolt (1), a nut (2) and a spring pin (3), wherein the bolt and the nut are used for fastening a connecting piece (4) in a common mode, and the looseness-prevention bolt structure is characterized in that the bolt (1) is provided with a hole (5) in the inner side of the tail part along the direction of a central line, two grooves (6) are formed in the outer side of the tail part, the grooves (6) are connected with the hole (5) into a whole, the tail part of the bolt is divided into two symmetrical parts, the diameter of the spring pin (3) is larger than that of the hole (5), the spring pin (3) can be installed in the hole (5) to enable the tail part of the bolt to expand and generate elastic deformation, and the bolt (1), the nut (2) and the spring pin (3. This anti loosening structure is all-metal, bears more extensive temperature range than nylon locknut structure, and the spring catch passes through elastic fit with the bolt, and difficult pine takes off, and high-frequency vibration is resistant, and locking effect is good, and this structure is better to the bolt effect that radial installation has the trouble.

Description

Locking bolt structure that moves

Technical Field

The invention relates to an anti-loosening bolt structure, and belongs to the technical field of bolts.

Background

In daily work and life, under the condition that static load and temperature change are not large, triangular threads used for bolt and nut connection have self-locking performance, but under the action of impact, vibration and variable load and the condition that temperature change is large, connection is possible to loosen or even loosen, normal work of a machine is influenced, and serious accidents are caused sometimes.

In the prior art, the process for preventing the bolt from loosening is mostly in the modes of increasing the number of nuts, adding resistance rings and the like, the loosening prevention effect is poor, in addition, part of the loosening prevention bolt adopts the modes of adding connecting pieces between the nuts and the bolt head and the like, the structure is complex, and the installation efficiency of the bolt is reduced, so the invention has important significance in effectively preventing the bolt from loosening due to the simple structure.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the defects existing in the prior art, the anti-loosening bolt assembly which can bear a wider temperature range, is high-frequency vibration resistant and can be repeatedly disassembled and assembled is provided.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the utility model provides an anti-loosening bolt structure, includes bolt, nut and spring catch, bolt and nut adopt the common mode to fasten the connecting piece, its characterized in that, the bolt is equipped with the hole along the central line direction at the afterbody inboard, is equipped with two grooves in the afterbody outside, the groove is even integrative with the hole, and has cut apart into two parts of symmetry with the bolt afterbody, the spring catch diameter is greater than the diameter in hole and the spring catch makes the bolt afterbody expand and produce elastic deformation in can installing the hole, bolt, nut and spring catch are the metalwork.

The spring pin is produced according to the national standard, the hole is formed by machining a threaded hole according to the national standard, the machining tolerance is H8, and the roughness Ra is less than 6.3.

Preferably, the anti-loosening bolt structure has a bolt strength of 8.8 grades and above.

Preferably, the anti-loosening bolt structure has a groove width not greater than 1mm and a groove length equal to the depth of the hole.

Preferably, the anti-loosening bolt structure comprises a head and a screw.

As a priority scheme, the anti-loosening bolt structure has the advantages that t +2k is more than t +2.5k, n is the length of the screw, k is the height of the nut, and t is the height of the connecting piece.

As a priority scheme, the anti-loosening bolt structure is characterized in that n- (t + k) < w < n- (t + k/2), w is the hole depth, n is the length of a screw, k is the height of a nut, and t is the height of a connecting piece.

Compared with the prior art, the invention has the beneficial effects that:

1. the anti-loosening bolt structure is an all-metal anti-loosening structure and can bear a wider temperature range than anti-loosening nut structures such as nylon.

2. The spring pin is in elastic fit with the bolt, is not easy to loosen, is high-frequency vibration resistant, and has good anti-loosening effect.

3. The bolt can be repeatedly disassembled and assembled without affecting the anti-loosening effect.

4. The structure can be adopted for the bolt which is difficult to radially install the anti-loosening device.

Drawings

The contents of the drawings and the reference numerals in the drawings are briefly described as follows:

FIG. 1 is a front view of a bolt loosening prevention structure;

FIG. 2 is a schematic view of the bolt loosening prevention;

FIG. 3 is a front view of the anti-loosening bolt arrangement;

FIG. 4 is a top view of the bolt tail;

FIG. 5 is a top view of the spring pin;

in the drawings, 1-bolt; 2, a nut; 3-a spring pin; 4, connecting pieces; 5-hole; 6, groove; 101 — head of bolt; 102-bolt screw.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, a locking bolt structure is provided, which includes a bolt 1, a nut 2 and a spring pin 3, the bolt and the nut fasten a connecting piece 4 in a common way, the bolt 1 is provided with a hole 5 at the inner side of the tail part along the central line direction, two grooves 6 are arranged at the outer side of the tail part, the grooves 6 are connected with the hole 5 into a whole, and the tail part of the bolt is divided into two symmetrical parts, the bolt (1), the nut (2) and the spring pin (3) are all metal pieces, the structure and the material provide a space for the spring pin 3 to elastically deform after being inserted into the hole, when the spring pin 3 with the diameter larger than that of the hole 5 is inserted into the hole 5 in an interference fit way, the tail part of the bolt is expanded to elastically deform, and mechanical force is applied to the nut 2, thereby preventing the bolt 1 from loosening.

The bolt (1) described with reference to fig. 3 comprises a head 101 and a shank 102, said n being the length of the shank 102, k being the height of the nut 2, t being the height of the connector 4, and t +2k < n < t +2.5k, said w being the hole depth, n being the length of the shank, k being the nut height, t being the connector height, and n- (t + k) < w < n- (t + k/2).

The bolt 1 described with reference to fig. 3 and 4 adopts strength of 8.8 grade and above, the width of the slot 6 on the bolt is not more than 1mm, the length is the same as the depth of the hole 5, and the inherent shaping of the bolt is utilized, so that the spring pin 3 can still be elastically and tightly matched with the bolt under high-frequency vibration or higher and lower temperature.

Referring to fig. 5, the spring pin may be selected from a resilient cylindrical pin.

The working principle of the specific embodiment is as follows: the bolt and the nut adopt a common mode to fasten the connecting piece, and the spring pin is arranged in the hole in an interference fit mode, so that the tail part of the bolt expands to generate elastic deformation, thereby playing a role in preventing looseness.

The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention, and any modifications and equivalents made within the spirit and scope of the present invention are included in the following claims.

Claims

1. The utility model provides an anti-loosening bolt structure, includes bolt (1), nut (2) and spring catch (3), bolt and nut adopt common mode to fasten connecting piece (4), its characterized in that, bolt (1) is equipped with hole (5) along the central line direction at the afterbody inboard, is equipped with two grooves (6) in the afterbody outside, groove (6) and hole (5) are even as an organic whole, and cut apart into two parts of symmetry with the bolt afterbody, spring catch (3) diameter is greater than the diameter of hole (5) and spring catch (3) can install in hole (5) and make the bolt afterbody expand and produce elastic deformation, bolt (1), nut (2) and spring catch (3) are the metalwork.

2. A locking bolt construction according to claim 1, characterized in that the bolt (1) is a 8.8 grade and above strength bolt.

3. A structural anti-loosening bolt member as claimed in claim 1, wherein the groove (6) has a width of not more than 1mm and a length equal to the depth of the hole (5).

4. A locking bolt arrangement according to claim 1, characterised in that the bolt (1) comprises a head (101) and a shank (102).

5. The structure of claim 1 or 4, wherein t +2k < n < t +2.5k, n is the length of the screw (102), k is the height of the nut (2), and t is the height of the connecting member (4).

6. A structure as claimed in claim 1 or 4, characterised in that n- (t + k) < w < n- (t + k/2), w being the depth of said hole (5), n being the length of the screw (102), k being the height of the nut (2) and t being the height of the connecting piece (4).