JPH03107614A - Vibrationproof roller bearing - Google Patents

Abstract

PURPOSE:To attenuate vibration of a bearing so as to stabilize operation of a machine by pressing a part of a vibration attenuation ring elastically on the surface of either of an outer ring having an inner track on an inner peripheral face and an inner ring having an outer track on an outer peripheral face. CONSTITUTION:A recessed groove 7 is formed at the center of outer peripheral face of an outer ring 2, and a vibration attenuation ring 8 made of metal or synthetic resin is mounted in the inside of the recessed groove 7. Inside diameter of the vibration attenuation ring 8 in free condition is smaller than a diameter of the bottom face of the recessed groove 7. For this reason, the ring is mounted elastically in pressed condition. When the outer ring 2 on which the vibration attenuation ring 8 is mounted vibrates, an inner peripheral edge of the vibration attenuation ring 8 and a bottom face of the recessed groove 7 cause friction each other. Consequently, vibration of the outer ring 2 is absorbed due to friction, and vibration which is transmitted from a rotary shaft which passes into the inside of an inner ring 4 to roller bearing is attenuated. The vibration does not increase. Thus, the machine which incorporates the bearing enables stable operation.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The anti-vibration rolling bearing according to the present invention is used to support rotating shafts incorporated in various mechanical devices such as machine tools.
This is to prevent the vibration from growing when the rotating shaft vibrates.

(Prior technology) In order to support the rotating shaft incorporated in various mechanical devices, the sixth
As shown in the figure, an outer ring 2 having an inner raceway 1 on its inner peripheral surface;
an inner ring 4 having an outer raceway 3 on its outer peripheral surface; and the inner raceway 1
A rolling bearing consisting of a plurality of rolling elements 5 provided between the outer raceway 3 and the outer raceway 3 is widely used.

Incidentally, a rotating shaft rotatably supported by such a rolling bearing may vibrate as a mechanical device incorporating this rotating shaft is operated. If such vibrations are left untreated, they may grow due to resonance or the like, and the mechanical device may not operate smoothly.

For this reason, as shown in FIG. 6, an elastic body 6 made of synthetic resin or the like is attached to the outer peripheral surface of the outer ring 2 by baking or the like, so that when the outer ring 2 vibrates due to the vibration of the rotating shaft, The elastic body 6
For example, it is possible to absorb this vibration by
This has been done in the past, as disclosed in Japanese Patent No. 18721 and the like.

(Problem to be solved by the invention) However, in the case of the conventional anti-vibration rolling bearing as described above,
When the outer ring 2 is mounted inside a housing etc. and the rotating shaft is inserted inside the inner ring 4, the center of rotation of the rotating shaft is likely to shift as the elastic body 6 deforms based on the load applied to the rotating shaft. , if it deviates, other vibrations will occur due to the eccentric movement of the rotating shaft.

The anti-vibration rolling bearing of the present invention eliminates the above-mentioned disadvantages.

(Means for Solving the Problems) The anti-vibration rolling bearing of the present invention has an outer ring having an inner raceway on the inner peripheral surface and an inner ring having an outer raceway on the outer peripheral surface, similar to the conventional rolling bearing described above. and a plurality of rolling elements provided between the inner raceway and the outer raceway.

Furthermore, in the anti-vibration rolling bearing of the present invention, a portion of the photographic damping ring is elastically pressed against the surface of at least one of the outer ring and the inner ring.

(Function) In the anti-vibration rolling bearing of the present invention configured as described above, when the outer ring or the inner ring equipped with the vibration damping ring vibrates, the vibration damping ring contacts the surface of the outer ring or the inner ring. They rub against each other, and as a result of this friction, vibration energy of the outer ring or inner ring is absorbed, and vibrations transmitted from the rotating shaft or housing to the rolling bearing are damped. As a result, the vibrations are prevented from growing and interfering with the operation of the mechanical device incorporating the rolling bearing.

(Example) Next, the present invention will be explained in more detail while explaining the illustrated embodiment.

FIG. 1 is a partial sectional view showing a first embodiment of the present invention.

In each embodiment, the configuration of the rolling bearing itself is the same as that of the conventional rolling bearing described above, and therefore, redundant explanation will be omitted, and the features of the present invention will be explained below.

In the first embodiment shown in FIG. 1, a U-shaped groove 7 is formed in the center of the outer peripheral surface of the outer ring 2 over the entire circumference, and inside this groove 7, A vibration damping ring 8 made of metal such as stainless steel or synthetic resin is attached.

The inner diameter of the vibration damping ring 8 formed in the shape of a broken ring in a free state is made slightly smaller than the diameter of the bottom surface of the groove 7, and the vibration damping ring 8 is mounted inside the groove 7. In this state, the inner peripheral edge of the photographing damping ring 8 is elastically pressed against the bottom surface of the groove 7.

In the case of the anti-vibration rolling bearing of the present invention configured as described above, when the outer ring 2 equipped with the vibration damping ring 8 vibrates, the inner peripheral edge of the vibration damping ring 8 and the bottom surface of the groove 7 rub against each other. We share each other.

Along with this friction, the vibration of the outer @ 2 is absorbed, and the vibration transmitted to the rolling bearing from the rotating shaft inserted inside the inner ring 4 or the housing in which the outer ring 2 is fitted and supported is attenuated. This vibration is prevented from growing and interfering with the operation of mechanical equipment incorporating the rolling bearing.

The outer diameter r of the wire constituting the vibration damping ring 8 is smaller than the depth d of the groove 7 formed on the outer circumferential surface of the outer ring 2 (
red)I,...When the outer ring 2 is fitted and fixed into the housing, the outer circumferential edge of the vibration damping ring 8 is prevented from coming into contact with the inner circumferential surface of the housing.

Therefore, when the rolling bearing is used, no load is applied to the vibration damping ring 8, and the durability of the vibration damping ring 8 is sufficiently ensured.

Next, FIG. 2 shows a second embodiment of the present invention.

In the case of this embodiment, grooves 7.
7, and a vibration damping ring 8.8 is mounted inside each groove 7.7. In the case of this embodiment, the outer peripheral edge or inner peripheral edge of the vibration damping ring 8.8 is connected to the groove 7.7.
It is pressed against the circumferential surface of the

In the case of the third embodiment shown in FIG. 3, grooves 7.7 are formed at both ends of the inner peripheral surface of the outer ring 2, and inside each groove 7.7,
A vibration damping ring 8.8 is installed.

In the case of the fourth embodiment shown in FIG. 4, the groove 7 has a rectangular cross section and a flat bottom surface, and a vibration damping ring 8 is installed inside the groove 7. It is formed into a band shape to increase the contact area between the inner peripheral surface of the vibration damping ring 8 and the bottom surface of the groove 7.

Furthermore, in the case of the fifth embodiment shown in FIG. 5, inwardly bent portions 9.9 are formed at both edges of the vibration damping ring 8.
In addition to improving the rigidity of the vibration damping ring 8, deep grooves 10.10 are formed on both sides of the groove 7 to house the inwardly bent portions 9.9.

In the case of these second to fifth embodiments, the above-mentioned
As in the f1 example, when the outer ring 2 vibrates, the vibration damping ring 8 rubs against the inner surface of the groove 7, absorbs the vibration energy, and damps the vibration of the outer ring 2 by fA.

In each of the above embodiments, the vibration damping ring 8 is attached to the outer ring 2, but in the rolling bearing of the present invention,
The vibration damping ring 8 may be attached to the inner ring 4 or even to both the outer ring 2 and the inner ring 4.

(Effects of the Invention) Since the anti-vibration rolling bearing of the present invention is constructed and operates as described above, it effectively damps the vibration transmitted to the rolling bearing and prevents the vibration of the rolling bearing from growing. This can be effectively prevented and mechanical equipment incorporating rolling bearings can be operated in a stable state.

[Brief explanation of drawings]

Fig. 1 shows the first embodiment of the present invention, Fig. 2 shows the second embodiment, Fig. 3 shows the third embodiment, Fig. 4 shows the fourth embodiment, and Fig. 5 shows the fourth embodiment. FIG. 6 is a partial sectional view showing the fifth embodiment, and FIG. 6 is a partial sectional view showing a conventional example. 1: Inner raceway, 2: Outer raceway, 3: Outer raceway, 4: Inner raceway, 5
: rolling element, 6: elastic body, 7: concave groove, 8: vibration damping ring, 9: inwardly bent part, 1o: deep groove part. Patent Applicant: Hikigaki Kogyo Co., Ltd. (and 1 other person) No.! figure

Claims (2)

[Claims] (1) A rolling bearing consisting of an outer ring having an inner raceway on its inner circumferential surface, an inner ring having an outer raceway on its outer circumferential surface, and a plurality of rolling elements provided between the inner raceway and the outer raceway. A vibration-proof rolling bearing characterized in that a part of a vibration damping ring is elastically pressed onto the surface of at least one of the outer ring and the inner ring. (2) A groove is formed in the outer ring or inner ring on which the vibration damping ring is mounted, and the vibration damping ring is mounted inside the groove without protruding from the groove, and a part of the vibration damping ring is 2. The anti-vibration rolling bearing according to claim 1, wherein the bearing is elastically pressed against the inner surface of the groove.