JPH0238102Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clip for positioning bearings and the like.

For example, in the case of a camshaft incorporated in a valve mechanism of an internal combustion engine, as shown in FIG. supported. The structure of the bearing part B will be explained using FIG. It is fixed to the bearing boss 2 by tightening bolts 5, 5, and the whole is held down from above.

For the thrust acting on camshaft 1,
The radial bearing 4 is positioned relative to the bearing part B using a clip 6 or a similar stopper member. In the case of the clip 6 shown in the figure, it is formed into a semicircular or horseshoe shape with a width dimension bm/m, and is fitted into a groove 3a bored on the inner peripheral surface on the shaft holder 3 side, into which the radial bearing 4 is pushed. Positioning is performed by hitting the target.

However, according to this type of clip structure,
When disassembling the engine for repair or inspection,
The clip 6 easily falls off, sometimes causing a situation where it falls deep into the device and gets mixed in.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a positioning clip which eliminates the above-mentioned problems of conventional clips.

Therefore, in the present invention, the clip is shaped so that it tightly fits into the existing groove of the two-split bearing holding member, for example, the clip is bent into a substantially dogleg shape and made of an elastic body such as a spring. It is characterized by a tight fit in a groove having a width determined by its elastic force.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Press punched into a semicircular shape. To be precise, it is desirable that it be somewhat shorter than the true half of the circle with radius R, and the shortened length l is shown in the figure. The reason for this short half-ring shape is that when it is set in the shaft holder 3 to form the bearing part B, it has a perfect clearance between both ends and other parts such as the bearing boss 2. It is not a perfect half, but is shortened by l.

Next, the clip 7 is bent at its center in the circumferential direction, and is formed into a substantially dogleg shape with an obtuse angle θ. That is, assuming that the thickness of the clip 7 is tm/m, a groove 3a having a width approximately corresponding to the thickness t is bored in the inner circumferential surface on the shaft holder 3 side, and the clip 7 is The approximately doglegged shape provides an elastic force similar to that of a leaf spring, and this elastic force allows the clip 7 to be semi-forcibly fitted into the groove 3a, thereby achieving a strong tight fit. (See Figure 3d).

Note that when press punching of the clip 7 is performed from the direction of arrow A, press burrs 7a are generated in the direction of the obtuse angle θ.
It is also conceivable to have it cut inward to reinforce the tight fit.

Furthermore, although the clip 7 has been described as having a substantially dogleg shape, it may also be pressed with a gentle curvature in the circumferential direction, and the key is to bend it at at least one place in the thickness direction. In particular, it is desirable to have a restoring elastic force.
Further, the clip 7 is not limited to a semicircular shape, but also includes a completely circular shape or a circular shape divided into several equal parts.

Therefore, as is clear from the above, the positioning clip according to the present invention can be applied not only to the positioning of parts surrounding the bearing in the camshaft of an internal combustion engine, but also to a wide range of general industrial machinery. This eliminates the problem of the conventional type in which the device easily falls off and gets mixed in inside the device, and the structure is simplified, which has great effects.

In addition, by forming the overall length of the positioning clip to be shorter than the overall length of the groove bored in the shaft holder, which is one of the two halves of the bearing holding member, the bearing can be assembled by fitting the clip into the groove. During construction, a gap exists between both ends of the clip and the bearing boss, which is the other bearing holding member. Therefore, the clip does not interfere with the bearing boss, and assembly work can be performed quickly and easily.

On the other hand, the positioning clip is bent at at least one place in the direction of the central axis of the rotating shaft, and by forcibly fitting it into the groove, a restoring elastic force is generated and a strong tight fit is achieved. A matching state has been obtained. In this fitted state, the bent portion of the clip is stretched and becomes somewhat longer than before the fitting, and there is a concern that this may interfere with the bearing boss. However, as mentioned above, the clip is formed to be shorter than the groove in order to have clearance for engagement with the bearing boss, so when it is inserted into the groove, the bent part is extended and the overall length is reduced. Even if it becomes large, it will not interfere with other parts.

Further, because of this configuration, the edge portion of the clip that engages with the groove faces and abuts against the side wall of the groove,
Furthermore, the generated restoring elastic force makes it easy for the edge portion to firmly bite into the inner wall surface of the groove, which is more effective in preventing falling off.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view showing a form in which a positioning clip is used in a camshaft bearing of a valve mechanism, and Fig. 2 a and b are a side sectional view of Fig. 1 and a vertical sectional view taken along the Y-Y line. FIGS. 3A, 3B, 3C, and 3D are a plan view, a front view, and a partial front view of a positioning clip according to an embodiment of the present invention, and a developed view of the engagement between the groove and the clip. Explanation of symbols of main parts, 1...Camshaft,
2...Bearing boss, 3...Shaft holder, 3a...
...Slot, 4...Radial bearing, 5...Shaft holder fixing bolt, 6, 7...Positioning clip, 7a...Press burr, B...Bearing part,
b... Width dimension of the clip, l... Shortened length of the clip, t... Thickness dimension of the clip, θ... Obtuse angle of bending of the clip.

Claims (1)

[Claims for Utility Model Registration] (1) In order to position the radial bearing that pivotally supports the rotating shaft in the thrust direction, the inner periphery of one of a pair of half-split holding members that clamps the radial bearing. It is formed in a semi-annular shape so as to fit closely into a groove bored in the circumferential direction of the surface, and is bent at at least one place along the radial direction of the rotating shaft, and its side surface is attached to the radial bearing. A positioning clip characterized by being in contact with the side surface of the outer ring. (2) The positioning clip according to claim 1 of the utility model registration claim, wherein the overall length is shorter than the overall length of the groove.