SU916792A1 - Part treaded connection - Google Patents

Description

The invention relates to the machine structure and is designed to lock the threaded connections.

Known threaded connection parts containing bolted parts, washer with notch and a smooth washer with a central hole, fixing the position of the bolt. The central hole of the smooth washer is made non-circular, and the notched washer has a height greater than the height of the smooth washer, is made in the shape of its hole and is installed inside the latter [1].

The disadvantages of this device is the violation of the surface of the fastened part by a notch on the washer and the presence of a place of multiple plastic fold on a smooth washer.

Closest to the present invention is a threaded connection of parts containing a threaded fastener installed in the coaxial holes of the parts to be joined.

2

with a head, on the peripheral part of the bearing surface of which the corrugation is made, and an elastically deformable lock washer, placed under the supporting surface of the head of the mounting threaded element. The locking washer has the shape of a truncated cone, on the upper base of which are corrugations, the response corrugations of the threaded fastener, and on the lower base of the washer there are sharp protrusions for fixing it from turning [2].

The disadvantages of the known compounds the complexity of manufacturing locking washers and low reliability of locking with little effort to tighten the fastener.

The purpose of the invention is the improvement of the locking properties of the threaded fastener.

This goal is achieved by the fact that in a threaded connection, containing, installed in coaxial screwdrivers 916792

The stitches of the parts to be joined are a threaded fastener with a head, on the peripheral part of the bearing surface of which a corrugation is made, and an elastically deformable flat lock washer placed under the supporting surface of the head of the threaded fastener. annular collar does not exceed the diameter of the flat part of the support surface of the threaded fastener.

The corrugations of the threaded element are sinusoidal with a height that decreases in the direction of the axis of the latter.

In order to obtain additional locking force, the threaded joint is provided with an annular elastic liner located between the washer and the surface of the part to be joined around the annular collar.

A support ring is placed under the elastic liner, and the lock washer is made with an inner diameter equal to the diameter of the support ring, and the support ring, elastic liner and lock washer are rigidly connected to each other and their total height does not exceed the height of the ring collar.

The annular shoulder of the threaded connection is made as a separate part, fixed relative to one of the connected parts.

FIG. 1 shows a threaded connection, a general view; in fig. 2, node I in FIG. 1 (position of the joint before fixation); in fig. 3 "9 ~ connection options.

The proposed threaded connection contains a washer 1, made flat inelastic resiliently deformable, and parts 2 and 3, fastened by a threaded element 4. Part 2 has an annular collar 5, on which the washer 1 is supported. The washer 1 is fixed relative to the base part 2 with an antennae 6. The head of the threaded element 4 is equipped with a corrugator 7, made in the form of protrusions on the peripheral part of the bearing surface of the head.

Threaded connection works as follows.

four

Washer 1 is put on the threaded element, after which parts 2 and 3 are tightened with the threaded element.

In this case, the washer 1 is fixed with a tendril 6 on part 2. As the screwing element is screwed, the protrusions of the corrugator 7 elastically deform the washer 1, forming corrugations on its surface, which, due to elasticity and friction forces acting on the protrusions of the corrugator, prevent self-unscrewing of the thread element 4. Besides Moreover, the protrusions of the corrugator have a sinusoidal shape, and the height of the protrusions of the corrugator is made decreasing in the direction to the axis of the threaded element 4. The height of the ring collar 5 is greater than the height of the protrusions of the corrugation zovatelya to washer 1 had space for deforming the projections gofroobrazovatelya 7. ·

In the connection (FIG. 3), the annular shoulder 5 is made flush with the surface of the part 2. The connection operates as in FIG. one.

In the compound shown in FIG. 4 and 5, an elastic, elastically deformable liner 8 (rubber ring) is placed under the washer, which can be both in the free and in the pre-compressed state, and its thickness is greater than the height of the projections of the corrugator.

As the threaded element is screwed, the protrusions of the corrugator deform the washer 1 and the elastic resilient liner 8 placed under it, while the elastic resilient liner 8 allows you to obtain additional locking forces and streamline the formation of the corrugations on the washer 1.

In the compound shown in FIG. 6 and 7, the ring shoulder 5 on the part 2 is replaced with the backing washer 9, which is fixed relative to the part 2 by the tendril 10, while the washer 1 is placed on the support washer 9 and fixed on it by the tendril 6. The height of the support washer 9 is greater than the height of the corrugator 7 · The connection works similar to the compound depicted in FIG. one.

In the compound shown in FIG. 8 and 9, under the elastic elastically ^ζ deformable liner 8 is placed

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5 9

rigid support ring. The washer 1 and the rigid support ring 11 are connected to an elastic, elastically deformable liner 8 (for example, they are glued), the rigid supporting ring 1 1 being fixed relative to part 1 with a tendril 12, and the washer 1 does not interact with part 2. The height of the collar 5 (Fig. 8 and 9) is greater than or equal to the sum of the thicknesses of the washer 1, the rigid support ring 11 and the elastic, elastically deformable liner.

The application of the proposed threaded connection in comparison with the known allows to ensure the locking at any time, tightening, improve the reliability of locking and improve the performance of the locking device.

Claims (2)

Claim 1. A threaded connection of parts comprising a threaded fastener with a head installed in coaxial holes of the parts being joined, with a head on the peripheral part of the supporting surface of which is a corrugation, and an elastically deformable flat lock washer placed under the supporting surface of the head of the fastening threaded element, characterized in that improve the locking properties of the fastener, the part to be joined from the side of the locking washer has a bearing surface in the form of an annular collar, while the outer diaa792. 6 The collar meter does not exceed ’the diameter of the flat part of the bearing surface of the threaded fastener. 5 2. Threaded connection with π. one, characterized in that the corrugations are made along a sinusoid with a height that decreases in the direction of the axis of the threaded fastener. ¹⁰ 3. Threaded connection according to claim 1, characterized in that, in order to obtain additional locking force, it is provided with an annular elastic liner, ¹⁵ placed between the washer and the surface of the part to be joined around the collar. 4. Threaded connection with π. 1, characterized in that ² θ a support ring is placed under the elastic liner, and the lock washer is made with an inner diameter equal to the diameter of the support ring, the support ring being elastic ²⁵ liner and lock washer are rigidly connected to each other and their total height does not exceed the height of the collar. 5. Threaded connection according to claim 1, ³⁰ characterized in that ring collar is made as a separate part, fixed relative to one of the parts to be joined. Information sources, 35 taken into account in the examination 1. USSR author's certificate No. 486155, cl. Р 16 В 39/24, 1973. 2. US patent No. 3438416, cl. Р 16 В 39/28, 1967 (prototype). FIG. 3 FIG. 2 I FIG. 7 I