JPS58113622A - Fastening device of ball joint - Google Patents

Abstract

PURPOSE:To perform a fastening work securely and easily by inserting a washer with a rise section between a link member and a self-locking nut to screw so that a sufficient axial direction load is applied to a ball stud by means of the rise section. CONSTITUTION:A ball stud 2 is taper coupled with a ling member 1, and a washer 4 is inserted between a self-locking nut 3 for fastening and the link member 1. This washer 4 is provided with a rise section 4'' notched on the periphery of a base plate 4'. As the nut 3 is fastened the rise section 4'' is compressed, and a sufficient axial direction load is applied to the ball stud 2 by means of its reaction force, then before the self-locking member 5 of the nut 3 is screwed, the taper coupling section of the taper hole 6 is pressed and coupled, and when the member 5 is screwed, the ball stud 2 is pressed and locked to the link member 1 by surpassing the friction, thus the slip is prevented. Accordingly, as the nut 3 is screwed the rise section 4'' is crushed into a flat ring-like washer shape to complete the fastening.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball joint fastening device for fastening a pole stud taper-fitted to a link member by threading a detent nut.

Conventionally, in this type of fastening device, in the process of tightening the detent nut onto the threaded portion of the pole stud, the detent acting member made of nylon, rubber, etc. and the threaded pre-adjustment portion of the pole stud were contacted before the tightening was completed. 7 compression occurs, and since this free cushion is higher than the rotational tension cushion of the pole stud itself, the pole stud rotates together with the nut, making it impossible to tighten the nut.

The present invention addresses this problem by interposing and threading a washer having a raised portion between the link member and the detent nut so that the raised portion applies sufficient axial load onto the pole stud. establishing a fully seated, secure engagement between the tapered aperture of the pole stud and the tapered portion of the pole stud. This prevents the pole stud from rotating relative to the link member, making it possible to easily and reliably tighten the detent nut.

It goes without saying that the configuration of the present invention has great advantages in terms of assembly man-hours and cost per part when compared to the conventional nut detent system using split pins (not shown).

JP-A No. 54-22053 is known as a method for preventing the pole stud from idling, similar to the present invention, but this method can use a drum-shaped annular washer, so it cannot be used with normal machining techniques. However, the present invention has the advantage that it can be easily processed using conventional techniques and equipment.

Also, the one using a washer shown in FIG. 6 is designed to make the nut's detent action more effective by changing the distribution of surface pressure acting on the seat surface when screwed together.

The present invention will now be explained by way of example with reference to both figures.

In each figure, 1 is a link member, 2 is a pole stud, and 3
is a detent nut, 4 is a washer, 5 is a detent action member, 6 is a tapered hole, 7 is a pole joint socket, 8
1 shows a dust cover, and as shown in FIG.
Attach. As shown in FIG. 3, the washer 4 has a rising portion 1 formed by cutting out the peripheral edge of the base plate 4, and the rising portion 49 maintains the distance between the detent nut 3 and the link member 1.

When the detent nut 3 is tightened from this state, the rising portion 41 of the washer 4 is compressed, and the reaction force applies a sufficient axial load to the pole stud 2 before the detent member 5 of the nut is screwed together. When the pole stud 2 and the taper 711 of the tapered hole 6 of the link member 1 are press-fitted together, and the nut's detent member 5 is screwed together, the pole stud 2 overcomes the free cushion of the detent member 5.
can be crimped and secured to the link member 1 to prevent it from idling. Furthermore, this washer may be used in a nut that does not include the detent member 5.

In this way, as the detent nut 3 is screwed, the rising portion A of the washer 4 is crushed, and the fastening is completed into a flat ring-shaped washer shape as shown in FIG.

That is, by using the structural functions of the present invention, the above-mentioned conventional drawbacks can be eliminated, the washer tightening work can be facilitated, and reliable and good performance can be obtained.

The structure of the rising portion 1 of the detent washer 4 is that instead of cutting out the peripheral edge of the substrate 4' as shown in FIG. 3, the rising portion 41 is formed by cutting out the inner peripheral edge of the substrate 4' as shown in FIG. You can also do it.

FIG. 7 is a longitudinal sectional view when the washer shown in FIG. 4 is applied.

Further, as shown in FIG. 5.6, the rising portion 4'' can be further bent to improve contact with the detent nut 3.

FIG. 8 shows another washer handling according to the present invention in which the base plate 4' side faces the detent nut 3 side, the bent part of the rising part 4' is placed in contact with the link member 1, and the detent nut 3
As the screw is screwed in, the rising portion 4 is compressed and fastened in the state shown in FIG.

This item has leakage on the bearing surface of the link member due to tightening of the nut.
In other words, the present invention generates an axial load on the pole stud before the nut's detent action part is screwed into the taper fitting part of the pole stud.
This prevents the pole stud from idling and makes it easier to tighten the detent nut.

[Brief explanation of drawings]

The schematic diagrams show embodiments of the present invention, and FIG. 1 is a vertical cross-sectional side view of the 111th embodiment before tightening, FIG. 2 is a vertical cross-sectional side view showing the tightened state of FIG. 1, and FIG. FIG. 1.2 is a perspective view of the washer used in FIG. 4.5.6 is a perspective view of another embodiment of the washer;
The figure is a vertical view showing the state before tightening when the washer shown in Fig. 4 is used, and Fig. 8 is a vertical view showing the state before tightening when the washer shown in Fig. 4 is used.
・Pole stud, 3... Detent nut, 4...
Washer (4'... board, l... rising part), 5.
... Detent action member, G... Tapered hole, 7... Pole joint socket. That's it! 1 Neck 4 Ro-1: Off figure O B flash Ode shout

Claims (1)

[Claims] (l) In a ball joint fastening device in which a pole stud tapered into a link member is fastened by threading a detent nut, a washer having several rising portions is inserted between the link member and the ball joint. When interposed between the retaining nuts and hinged, the raised portion of the shell applies a sufficient axial load onto the pole stud, and the tapered fitting portion is brought into pressure film contact before the detent acting portion of the nut is screwed. A ball joint fastening device characterized by preventing a pole stud from idling when screwing together a detent acting part of a nut F, and crushing and fastening a rising part of the washer according to the hinge of the detent nut. (2) The ball joint fastening device according to claim 1, wherein the rising portion of the ml washer is made to rise from the outer peripheral portion. (3) The ball joint fastening device according to claim 1, wherein the washer rising portion is made to rise from the inner peripheral portion. (4) The ball joint fastening device according to any one of claims 1 to 5, wherein the washer rising portion is bent. (5) The ball joint fastening device according to claim 4, wherein the upright bent portion of the washer is further bent and attached by threading a nut. (6) The ball joint fastening device according to claim 4, wherein the rising bent portion of the cough washer is flatly attached by screwing with a nut.