RU183347U9 - Flat metal lock washer - Google Patents

Abstract

The utility model relates to mechanical engineering, and in particular to devices for locking threaded joints.

A flat metal locking washer, including a base, the supporting surface of which is made with fixing protrusions along the contour, a neck with grooves from which spring retaining teeth are bent, and a flat metal locking washer has two or more locking elements, made both along the contour and along the neck of the washer in the form of segments evenly distributed along the circumference of the contour and the neck of the washer, with the teeth protruding asymmetrically on the opposite sides of the locking elements.

The technical result is the creation of increased friction with a lock washer. 2 ill.

Description

The utility model relates to mechanical engineering, and in particular to devices for locking threaded joints.

A device is known as a washer, comprising a spring-loaded inner wavy crown, slots and retaining teeth bent in different directions. Serves to prevent self-unscrewing of threaded joints due to elastic deformation of the washer under load. (Patent SU No. 45873 Published January 31, 1936).

The disadvantage of the washer is a small pressure zone with insufficiently high friction.

A device is known as a spring washer containing an annular body made of an elastic tape, the ends of which are joined and bent in opposite directions [2-3].

The disadvantage of this device is the small pressure zone with insufficiently high friction.

Closest to the claimed technical solution is the Komarnitsky spring washer device, which includes a base, the supporting surface of which is made with locking tabs along the contour, a neck with grooves, from which spring retaining teeth are bent, bent to an angle selected from the condition that the washer is flat in shape when fully puff. (UA Patent No. 50338 Published October 15, 2002 Bull. No. 10, 2002r).

The disadvantage of the washer is a small pressure zone with insufficiently high friction.

The proposed technical solution allows to eliminate these disadvantages.

The technical result is the creation of increased friction with a lock washer.

The present technical result is achieved by the device a flat metal locking washer, including a base, the supporting surface of which is made with locking tabs along the contour, a neck with grooves from which spring retaining teeth are bent, and a flat metal locking washer has two or more locking elements made as along the contour and along the neck of the washer in the form of segments evenly distributed along the circumference of the contour and the neck of the washer, with the teeth asymmetrically protruding e sides of the locking elements.

Distinctive features are:

- a flat metal locking washer has two or more locking elements made both along the contour and along the neck of the washer in the form of segments.

The presence in a flat metal locking washer of more than one retaining element with protruding edges of the teeth in opposite directions will allow the screw-nut system to withstand stronger vibration loads compared to existing counterparts.

The outer diameter has a greater friction moment. Segment execution of the locking elements eliminates lateral friction of the spring segment on the washer body.

- uniformly distributed along the circumference of the contour and the neck of the washer, with asymmetrically protruding edges of the teeth on opposite sides of the locking elements.

The locking elements uniformly distributed along the circumference of the contour and asymmetrically along the circumference of the neck of the washer of the sharpened edges of the elements will contribute to more friction against the flat surfaces of the joint and will further prevent the joint from being unscrewed, as well as compensate for the vibratory dynamic loads of the individual working segments of the washer.

Comparison of the proposed solutions with analogues and prototype did not allow to identify in them the signs that distinguish the claimed solution, which allows us to conclude that the criterion of "novelty".

In FIG. 1 shows a flat metal locking washer, a general horizontal view containing the outer contour 1, neck 2, housing 15, twelve locking elements 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14 bent under angle.

In FIG. 2 is a frontal sectional view AA in FIG. 1 flat metal locking washer, consisting of a housing 15, two sharp edges 11 and 12, 13 and 14, as well as the bending angle of the locking elements 16.

Flat metal locking washer works as follows.

The washer, made in the form of a circle, has cut out locking segments excluding their friction against the washer body. The bent edges of the teeth of the locking segments are produced by high-speed heating by high-frequency currents (up to 40 kHz) to the parts of the workpiece subjected to surface hardening to a temperature of 950 ° C; upon completion of heating, the workpiece is placed in an oil bath. The edges of the locking segments located in different planes are made in a circular array to create increased friction.

When tightening the threaded connection, the sharp edges of the teeth of the washer 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14 placed between the joined part and the nut, uniformly distributed around the outer circumference 1, cut into the flat surfaces of the connection and further prevent the unscrewing of the connection from vibration. To increase locking, the bending angle of 16 locking elements 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14 should be from 5-12 degrees relative to the body 15 of the washer [4].

The proposed washer allows you to increase frictional locking by creating increased friction between the locking and locking parts, using several locking elements with sharp teeth edges evenly distributed around the circumference of the contour and asymmetrically around the neck of the washer.

Information sources:

1. Patent SU No. 45873 Published on 1/31/1936;

2. Patent RU No. 20155425 Published: 06/30/1991;

3. Robin Jameson. Big Encyclopedia of the Golden Hands Master. LITRES, 2017, p. 35.

4. UA patent No. 50338 Published on October 15, 2002 Bul. No. 10, 2002

Claims (1)

A flat metal locking washer, including a base, the supporting surface of which is made with fixing protrusions along the contour, a neck with grooves from which spring retaining teeth are bent, characterized in that the flat metal locking washer has two or more locking elements made as along the contour, and along the neck of the washer in the form of segments evenly distributed along the circumference of the contour and the neck of the washer, with the teeth protruding asymmetrically on the opposite sides of the locking elements.

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