JPS60249722A - Roll bearing - Google Patents

Abstract

PURPOSE:To prevent breakdown or vibration due to impact by arranging a hollow flexible roller having the diameter slightly larger than the gap of coaxial rolling faces between said rolling faces while providing a core member having constant clearance in said roller. CONSTITUTION:A rolling member 5 having the diameter d2 slightly larger than the gap d1 between rolling faces 1, 3 is assembled between an inner ring 2 having first rolling face 1 and an outer ring 4 having second rolling face 3. While a core member 7 having the diameter d4 slightly smaller than the diameter d3 of a hole 6 made through the rolling member 5 is assembled in said hole 6. Consequently, the rolling member 5 will roll between the first and second rolling faces 1, 3 while flexing slightly. Since there is no gap between the rolling faces 1, 3, the impact or vibration to be applied onto said rings 2, 4 are absorbed through flexure of the rolling member 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling bearing that is currently widely used, and particularly to a rolling bearing that has characteristics of absorbing shock and vibration.

Currently, rolling bearings using spheres or rollers are widely used in rotary and linear motion parts of automobiles, industrial machinery, etc. However, one of the drawbacks of such rolling bearings is that they do not have the ability to absorb shocks and vibrations, so relatively small shocks and vibration loads generated on the rotating parts can damage the bearings or generate noise. It's about doing things.

The present invention eliminates these drawbacks by using a rolling element in which a core body with a certain clearance is provided within a hollow roller, and there is no noise or vibration, and the bearing is not damaged by impact loads. To provide a rolling bearing that operates extremely smoothly without any problems. The structure of the present invention will be explained below with reference to the figures.

FIG. 1 is a side sectional view showing the structure of an embodiment of the present invention, and FIG. 2 is a front sectional view thereof. 1 and 2, there is a distance between the inner ring 2 having the first rolling surface 1 and the outer ring 4 having the second rolling surface 3 than the distance d1 between both rolling surfaces 1 and 3. A rolling element 5 having a large diameter d2 is installed, and a core 7 having a diameter d4 slightly smaller than the diameter d3 is installed in the hole 6 provided in the rolling element 5. When the outer ring 4 is fixed and the inner ring 2 is rotated as shown in FIGS.
Perform a rolling motion between the In this case, unlike conventional rolling bearings, there is no gap between the rolling elements 5 and the rolling surfaces 1 and 3, so rotation is extremely smooth, and there is no impact force or vibration on the rotating inner ring 2. Even if the force is applied, the rolling elements 5 bend slightly to absorb it, so that it is not transmitted to the outer ring 4. Furthermore, when a large static force is applied, the holes 6 of the rolling elements 5 come into contact with the core 7, so the rolling elements 5 do not bend any further, preventing them from being damaged. FIG. 3 is a graph showing the load and displacement of the rolling bearing on the vertical and horizontal axes, respectively. Line A shows the characteristics of the rolling bearing of the present invention, and line B shows the characteristics of the conventional rolling bearing. As shown by line A in Figure 3, from point 0 where the load is 0 to point P where the hole 6 of the rolling element 5 and the core 7 contact, the load and displacement are almost proportional and the rigidity is relatively small. The amount of displacement between P and Q after the core body 7 contacts the surface of the hole 6 is the compressive elastic modulus of the material itself, so it is almost the same as a normal rolling bearing, and its rigidity is high. The space between the OPs receives a relatively small dynamic load and absorbs vibrations and impact forces. The space between P and Q functions to handle high loads like conventional rolling bearings. In line B, from point 0 to point P', so-called play occurs due to the clearance of each part of the bearing itself, and displacement occurs even with almost no load applied, and from point P' to point Q', the amount of displacement suddenly becomes small. It appears to exhibit high rigidity. For this reason, O, P
′, shaft displacement occurs under a small load, which causes vibration. Moreover, since the rigidity suddenly becomes high at point P', an impact load is generated at this point, causing damage to various parts of the bearing.

The rolling bearing of the present invention solves these two drawbacks at the same time.

FIG. 4 is a cross-sectional perspective view showing the structure of another embodiment of the present invention. In Fig. 4, the inner rings 2 are approximately 90 degrees apart from each other.
First rolling surface 11 and 11' consisting of two surfaces forming an angle of
The outer ring 4 has second rolling surfaces 13 and 13' consisting of two surfaces forming an angle of approximately 90 degrees. Further, the core body 7 and the rolling elements 5 have substantially the same shapes as shown in FIGS. 1 and 2, but the diameter d2 is slightly larger than the length l.

The embodiment shown in Fig. 4 constitutes a so-called cross roller bearing, and exhibits the above-mentioned impact resistance and vibration absorption properties even against moment loads in the radial direction, thrust direction, and around an axis perpendicular to the rotation axis. You can.

FIG. 5 is a cross-sectional perspective view showing the structure of another embodiment of the present invention.

In Figure 5, the first figure consists of two figures perpendicular to each other.
The rolling surfaces 21 and 21' are provided on the bar 22 in at least two straight lines, and the second rolling surfaces 21 and 21' are formed of two surfaces perpendicular to each other.
The rolling surfaces 23 and 23' of the first rolling surface 2 are connected to the saddle 24.
1 and 21', and is constructed so as to be endless due to the double return path 28. Also, the cross-sectional shapes of the first rolling surfaces 21 and 21' and the second rolling surfaces 23 and 23' have a base angle of 90°, almost the same as that shown in FIG. The structures of the moving body 5 and the core body 7 are also similar to those shown in FIG.

Even with such a structure, the vibration absorbing properties and impact resistance of the present invention can be similarly exhibited.

As is clear from the above explanation, the rolling bearing of the present invention can be applied in various shapes, and its unique structure provides vibration absorption and durability that cannot be seen in conventional rolling bearings. In particular, it does not use elastic materials such as rubber, and its characteristics do not change even after long-term use and in a wide temperature range, making it stable. is extremely significant.

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing the structure of one embodiment of the present invention, Figure 2 is a side sectional view showing the structure of an embodiment of the present invention.
The figure is a front sectional view, FIG. 3 is a graph showing the characteristics of the present invention, FIG. 4 is a sectional perspective view showing the structure of another embodiment of the present invention, and FIG. 5 is another embodiment of the present invention. FIG. 2 is a cross-sectional perspective view showing the structure. 1-----first rolling surface, 3----second rolling surface,
5----Rolling element, 6----hole, 7----core body, patent applicant Yasuo Ueno

Claims (1)

[Claims] Between the first rolling surface and the second rolling surface, a plurality of flexible hollow roller-shaped rolling elements whose diameters are slightly larger than the distance between the two rolling surfaces are provided. A rolling bearing characterized in that a core body having a diameter slightly smaller than the diameter of the hollow hole is provided in combination in the hole.