CN111059131A

CN111059131A - Bolt anti-loosening fastening assembly

Info

Publication number: CN111059131A
Application number: CN201911223921.3A
Authority: CN
Inventors: 谭程瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-04-24

Abstract

The invention discloses a bolt anti-loose fastening assembly which is composed of a screw with a vertical groove in the thread, a nut with a hexagonal shape corresponding to the vertical groove on the inner side, an elastic retaining hook and a common spring washer. Specifically, one part of the elastic retaining hook is inserted into a screw groove and a corresponding nut groove simultaneously during work to prevent the relative movement of the screw and the nut, and the other part of the elastic retaining hook hooks the hexagonal part outside the nut to prevent the retaining hook from falling off, thereby playing the role of vibration resistance and looseness prevention on the whole bolt assembly. The bolt assembly can be widely used in the connection and fastening places of industrial products, belongs to the technical field of industry, can effectively solve the problem that bolts are easy to loosen and take off in connection and fastening, is easy to disassemble, can be repeatedly used, and reduces the maintenance cost and waste.

Description

Bolt anti-loosening fastening assembly

Belongs to the technical field of:

the invention relates to the field of fastening and looseness prevention of industrial products, in particular to a bolt assembly required by fastening and looseness prevention of industrial products.

Background

Currently, there are three types of fastening methods commonly used in industrial products, namely (1) friction locking, (2) mechanical locking, and (3) permanent locking. Although many methods are included, the method has the defects of poor effect in long-time use and vibration, complex assembly and disassembly, high use cost and waste.

Disclosure of Invention

The invention provides a novel anti-vibration anti-loose bolt capable of improving bolt fastening performance, aiming at solving the potential safety hazard caused by easy loosening or troublesome assembly and disassembly of the bolt in the working state in the prior art and reducing the maintenance cost in the use of the bolt. In the prior art, screws, gaskets and nuts used for fastening bolts only provide friction force between surfaces when the bolts are locked, the friction force is difficult to resist vibration and is loose, product damage and engineering danger are caused, or a welding mode and the bolts are difficult to assemble and disassemble, the bolts cannot be used repeatedly, and waste is caused. The invention uses a slotted screw and a slotted nut in the product connection and fastening. The common spring washer and the elastic stop hook are locked with each other, so that the anti-loosening, anti-rotation, firmness, safety and convenience are realized. The elastic stop hook is machined from ordinary spring steel in a soft state and is shaped as shown in fig. 3. Stop hook inserts the inslot of grooved nut and grooved screw simultaneously when using, and restriction nut and screw rotate relatively, like this, realizes the mutual locking of screw and nut under operating condition, prevents that bolt assembly is not hard up.

Drawings

The figure shows the part figures of the bolt assembly working structure diagram, the elastic retaining hook, the grooved screw and the grooved nut of the invention

FIG. 1 is a construction diagram of a check bolt assembly

FIG. 2 is a drawing of a grooved nut component

FIG. 3 is a view of the elastic retaining hook

FIG. 4 is a drawing of a grooved screw component

Detailed description of the invention

The locking function of the interlocking lock bolt of the present invention will be further described in detail with reference to the accompanying drawings

As shown in fig. 1, the interlocking lock bolt assembly of the present invention is composed of a slotted nut, a slotted screw, an elastic check hook, and a general spring washer. The shape of the elastic retaining hook in a static state is shown in figure 3, and the elastic retaining hook is formed by mechanically processing and molding common spring materials and then performing heat treatment and qualification. The nut is slotted at 120 degrees on the inner side of the original hexagon by using a common nut, as shown in figure 2. The screw is provided with a vertical groove at the thread part by a common screw, as shown in figure 4. The spring washer is a common spring washer.

When the nut is pressed, the semicircular part A (shown in figure 3) of the elastic retaining hook is inserted into a groove of the nut, the groove of the nut is positioned in a first groove in front of a screw groove, at the moment, the A part of the retaining hook generates radial friction force on the screw due to deformation, and the C part of the retaining hook hooks the outer angle of the nut to prevent the retaining hook from jumping out of the groove due to vibration. Therefore, the bolt assembly limits relative rotation of the nut and the screw to be loosened under the combined action of the surface friction force provided by the spring washer and the radial friction force provided by the retaining hook. Even if the nut is loosened due to too strong vibration, the nut can not turn around 1/3 circles, namely, the part A of the retaining hook is reset by the elastic force and is partially clamped in the screw groove, and the part A of the retaining hook is formed in the screw groove and the nut groove at the same time as shown in figure 1. The slot width is slightly larger than the diameter of the backstop hook, so that the nut is prevented from further loosening (shown in figure 1). When the nut is disassembled, the nut can be disassembled smoothly only by pulling out the retaining hook first. The groove on the nut must be opened at the corresponding position of the hexagon, and the screw groove can be opened in any direction, so that the strength of the nut and the screw is not influenced.

The invention has the advantages that (1) the cost of parts is low, the backstop hook can be made of common elastic wire rods, and the nut and the screw can be grooved in a broaching mode and can be automatically produced by utilizing stamping equipment. The three parts have no special requirements for processing precision and materials. (2) Good anti-loose effect, greatly reduced maintenance time and cost, and (3) convenient assembly and disassembly.

Claims

1. A bolt anti-loose fastening assembly comprises (1) a screw with a vertical groove, 2) a nut with a vertical groove on the inner side of a hexagon, 3) an elastic retaining hook and 4) a common spring washer. The anti-vibration anti-loosening bolt is characterized in that the elastic anti-loosening hooks are simultaneously inserted into the screw grooves and the corresponding nut grooves in the working state, the elastic anti-loosening hooks hook the outer sides of the nut hexagons at the same time, the nut and the screw are prevented from moving relatively, the anti-vibration anti-loosening effect of the bolt is achieved, and the bolt assembly can be repeatedly used after being disassembled.

2. The elastic anti-back hook as claimed in claim 1, wherein the bolt assembly is fixed by pressing a screw thread or inserting into a screw groove and a corresponding nut groove in an operating state, the elastic anti-back hook being made of an elastic material.

3. The hexagonal inside open vertical groove nut of claim 1, wherein the grooved portion is located at the corresponding position of the nut hexagon, and the nut strength is not affected.

4. A screw with a screw thread and a groove according to claim 1, wherein the screw is provided with only one groove in the screw thread, the depth of the groove being slightly deeper than the screw thread, so that the strength of the screw is not affected.