JP3102501U - Multiple loosening nut assemblies - Google Patents

Abstract

The present invention provides a multiple loosening prevention nut assembly that is convenient for inventory control and assembling and mounting, enhances on-site mounting efficiency, and has industrial utility value.
A screw hole penetrating in the axial direction is provided at the center of the nut, an upper flange protruding along the axial direction is provided around an upper end of the screw hole, and a central locking hole and an inner peripheral locking side are provided inside. An anti-loosening steel piece with a crimp is fixed by caulking, a lower flange extending in the axial direction is provided at the bottom end of the screw hole, and a conical anti-loosening washer with a thin top and a thick bottom is fitted to the outside. It is swaged and fixed, the bolt is tightened with a nut, and the anti-loosening washer is tightly locked to the diagonal thread of the bolt to achieve multiple anti-loosening functions.
[Selection diagram] Fig. 1

Description

  The present invention relates to a multi-slack nut assembly, and more particularly, to a slack-tight nut assembly having a slack-preventing steel piece at an upper end and a slack-prevention washer at a lower end.

  In general, a bolt has a shank provided with a thread, and a screw hole is provided at the center of the nut so as to fit into the thread of the bolt. During the actual screwing operation, the shaft of the bolt is inserted into the through hole of the object to be fixed, and the screw hole of the nut is screwed into the thread of the shaft of the bolt, and the object to be fixed is clamped and fixed between the bolt and the nut.

  However, in the situation where the object vibrates frequently, the bolt and nut are easy to loosen, so a washer is installed between the nut screwed to the bolt and the object, but the nut loosens completely due to the vibration of the nut. Can not be solved. In addition, both the nut and the washer are independent, which creates inventory management and assembly problems and also affects installation efficiency.

  The main object of the present invention is to provide a multiple anti-loosening nut assembly, which tightens the bolt with its own screw hole on the nut, presses elasticity with anti-loosening washer, and threads of bolt with anti-loosening steel strip. By applying a tightening on the oblique diameter, a multiple slack preventing effect is achieved. In addition, the nut, the slack-preventing washer, and the slack-preventing steel piece are combined into one, which is convenient for inventory control and assembling and mounting, and can enhance the mounting efficiency on site.

According to the invention of claim 1, a screw hole penetrating in the axial direction is provided in the center of the nut, an annular upper flange protruding along the axial direction is provided around an upper end of the screw hole, and a central locking hole and a central locking hole are provided inside. An anti-loosening steel piece with an inner periphery locking side is fixed by caulking, and an annular lower flange extending along the axial direction is provided at the bottom end of the screw hole. A multiple slack preventing nut assembly, wherein a slack preventing washer is fitted and fixed by caulking.
According to a second aspect of the present invention, there is provided the multiple loosening prevention nut assembly according to the first aspect, wherein the upper end of the upper flange of the nut is caulked to form an inner circumferential bent side.
According to a third aspect of the present invention, there is provided the multiple loosening prevention nut assembly according to the first aspect, wherein the bottom end of the lower flange of the nut is caulked to form an outer bent side. .
According to a fourth aspect of the present invention, there is provided the multiple slack preventing nut assembly according to the first aspect, wherein the slack preventing washer is freely rotated.

  The nut according to the present invention has a structure in which a slack-preventing steel piece and a slack-preventing washer are integrally joined to achieve multiple slack-preventing effects, as well as being convenient for inventory control and assembling and mounting, increasing the installation efficiency on site, Has industrial utility value.

  In the present invention, a screw hole is provided in the center of the nut in the axial direction, and an upper flange is provided around the upper end of the screw hole along the axial direction. A piece of anti-slack steel with caulking is fixed by caulking, a lower flange extending in the axial direction is provided at the bottom end of the screw hole, and a conical anti-slatch washer with a thin top and a thick bottom is fitted to the outside. It is fixed by caulking.

  In one embodiment of the present invention, the upper end of the upper flange of the nut is caulked to form an inner perimeter, and the bottom end of the lower flange is caulked to form an outer perimeter.

  As shown in FIG. 1, the loosening prevention nut 10 of the present invention has a screw hole 11 which penetrates vertically in the center in the center, and the outer periphery of the nut 10 is provided in a polygonal shape and other suitable shapes. Can be formed. The main feature of the nut 10 is that a slack-preventing steel piece 20 is provided at the upper end and a slack-preventing washer 30 is provided at the lower end. In addition, the nut 10, the slack-preventing steel piece 20, and the slack-preventing washer 30 are combined and integrated, which is convenient for inventory control and can increase the efficiency of installation on site.

  Before assembling the slack-preventing steel piece 20 and the slack-preventing washer 30 to the nut 10, as shown in FIG. 2, an annular upper flange 12 extending along the axial direction is provided around the upper end of the screw hole 11, An annular lower flange 13 extending in the axial direction is provided around the bottom end of the screw hole 11. In the upper flange 12 of the nut 10 there is provided a non-slack piece 20 with a central locking hole 21 and at least two opposing locking sides 22 on the inner circumference of the locking hole 21. The upper end of the upper flange 12 of the nut 10 is caulked inwardly to form an inner peripheral bent side 14 (see FIGS. 1 and 3), and the loosening prevention steel piece 20 is firmly and integrally caulked.

  In addition, a slack preventing washer 30 is fitted to the outside of the lower flange 13 of the nut 10, and the slack preventing washer 30 is a conical piece having a thin upper part and a thicker lower part. It has a wide base ring 32. The bottom end of the lower flange 13 of the nut 10 is crimped outward to form an outer perimeter 15 (FIG. 3), and the anti-loosening washer 30 is firmly and integrally fixed by caulking. In one embodiment, the center hole 31 of the anti-loosening washer 30 is movably fitted to the outer periphery of the lower flange 13 of the nut 10 and forms a state in which the anti-loosening washer 30 is rotatable after caulking and fixing. .

  In the initial screwing process shown in FIG. 4, the screw portion 41 of the bolt 40 is passed through the corresponding through hole 52 of the two fixed objects 50 and 51, and then the nut 10 is screwed into the screw portion 41 of the bolt 40 through the screw hole 11. The bottom ring 32 of the washer-preventing washer 30 is brought into contact with the surface of the object 50.

  As the nut 10 is subsequently tightened with a wrench, the anti-loosening washer 30 is strongly pressed and its bottom ring 32 expands outwardly as shown in FIG. As a result, the nut 10 tightens the screw portion 41, the strong pressing elasticity of the slack preventing washer 30, the deformation of the locking side 22 of the slack preventing steel piece 20, and the tight locking of the bolt 40 at the oblique thread, The two fixed objects 50 and 51 are surely fixedly connected to each other, and a multiple slack preventing effect is achieved, so that the nut 10 does not slack under a long-term vibration condition.

FIG. 2 is a perspective view of the nut assembly according to the embodiment of the present invention. FIG. 2 is an exploded perspective view of the nut assembly according to the embodiment of the present invention before assembly. FIG. 3 is a sectional view of the nut assembly according to the embodiment of the present invention. FIG. 4 is an initial screwing state diagram of the nut assembly of the embodiment of FIG. 3. FIG. 5 is a view showing a completed state of the screwing continued from FIG. 4.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Nut 11 Screw hole 12 Upper flange 13 Lower flange 14 Inner perimeter bent side 15 Outer perimeter bent side 20 Anti-loosening steel piece 21 Locking hole 22 Locking side 30 Anti-loosening washer 31 Center hole 32 Bottom ring 40 Bolt 41 Screw part 50 Cover Fixed object 51 Fixed object 52 Through hole

Claims (4)

  A screw hole penetrating in the axial direction is provided in the center of the nut, an annular upper flange protruding along the axial direction is provided around the upper end of the screw hole, and a central locking hole and an inner peripheral locking side are provided inside. An anti-slack steel piece is fixed by caulking, an annular lower flange extending in the axial direction is provided at the bottom end of the screw hole, and a conical anti-slatch washer with a thin top and a thick bottom is fitted to the outside. A multiple loosening prevention nut assembly characterized by being caulked.   2. The multiple loosening prevention nut assembly according to claim 1, wherein the upper end of the upper flange of the nut is caulked to form an inner circumferential bent side.   2. The multiple loosening prevention nut assembly according to claim 1, wherein a bottom end of the lower flange of the nut is caulked to form an outer bent side. 2. The multiple anti-loosening nut assembly according to claim 1, wherein the anti-loosening washer is in a free rotation state.

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