JPH048917A - Bearing device - Google Patents

Abstract

PURPOSE:To effectively supply lubricating oil to a bearing by providing an oil rake to supply lubricating oil raked up on the surface of a disc the basic edge of which is fixed on the bearing and the outer peripheral surface of which is covered on the other edge of the bearing. CONSTITUTION:An oil disc 3 is constituted of a plural number of rolling elements arranged on the outer periphery of a rotating shaft, a holding part 12 to hold these rolling elements 11 on the outer periphery of the rotating shaft 1 and a disc 13 engaged and inserted in the rotating shaft 1 locked to this holding part 12. An oil scraper 6 the basic edge of which is fixed and which supplies lubricating oil raked up on the surface of the disc 13 with its outer edge covering the outer periphery of the disc 13 to the bearing 2 is provided on the bearing 2. Lubricating oil in an oil reservoir is raked up with the slowly rotating disc 13 and lubricating oil raked up in this way is supplied to the bearing 2 with the oil scraper. Consequently, it is possible to effectively supply lubricating oil to the bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a bearing device that lubricates a bearing by pumping up lubricating oil with an oil disk.

(Prior Art) Disc-shaped oil discs have been widely used as one of self-lubricating means for bearings.

This oil disc is different from an oil ring.

Since it rotates together with the shaft, it is extremely reliable in terms of oil supply reliability.

However, on the other hand, when the circumferential speed of the oil disk exceeds a certain limit, the lubricating oil scatters and the range of application of self-lubrication in which a desired amount of oil can be obtained is narrowed. In addition, in order to raise this scattered oil as high as possible above the oil disk, various proposals have been made to install an oil guiding cover that wraps around the outer periphery of the oil disk, but the rate of increase in the amount of pumped up is only about 10 to 20% at most. However, it remained unsatisfactory.

On the other hand, multiple rolling elements are newly arranged around the outer circumference of the rotating shaft,
By rotating the rolling elements while rotating the shaft,
There is also a proposal to pump lubricating oil from the bearing box. (
For example, see Japanese Patent Publication No. 62-52198).

With this configuration, even if the shaft rotates at a high speed, the revolution speed of the rolling elements is reduced, so the amount of lubricating oil pumped up increases.

(Problem to be Solved by the Invention) However, in a bearing device configured in this manner, lubricating oil is pumped up by a retainer that maintains an interval between adjacent rolling elements and slidably envelops the rolling elements from both sides. Therefore, the amount of oil pumped up by the rolling elements is scraped off by the oil scattering due to the rotation (peripheral speed) of the rolling elements themselves and the contact between the rolling elements and the cage, and in reality, the amount of oil pumped up by the rolling elements is expected. It is not possible to do so and relies on pumping with a cage.

Moreover, this cage must maintain the distance between the rotating rolling elements and be able to slide on the rolling elements.The cage has a complicated shape, scraping off the lubricating oil pumped up by the cage and effectively refueling the bearings. In order to do so, an additional complicated and difficult configuration is required.

In fact, the bearing devices that have already been proposed do not mention any means for scraping off lubricating oil and supplying oil to the bearing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bearing device that can reliably and efficiently supply lubricating oil to a bearing by pumping it with an oil disk.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a bearing device that supplies lubricating oil from an oil reservoir in a bearing box to a bearing that supports a rotating shaft using an oil disk, in which an oil disk is disposed on the outer periphery of the rotating shaft. It consists of a plurality of rolling elements, an annular holding part that holds the rolling elements on the outer periphery of the rotating shaft, and a disk that engages with the holding part and is fitted onto the rotating shaft, and the base end is fixed to the bearing. This bearing device is characterized in that an oil scraper is provided at the other end covering the outer circumferential surface of the disc for supplying lubricating oil scraped up on the disc surface to the bearing.

(Function) As a result, the rotational speed of the disk is reduced in accordance with the revolution of the rolling elements that rotate on the outer periphery of the rotating shaft, and a large amount of lubricating oil in the oil sump is scraped up on the outer periphery of the disk. The oil is efficiently supplied to the bearing by the oil spool installed in the holder.

(Example) An example of a bearing device of the present invention will be described below with reference to the drawings.

Fig. 1 shows a bearing device equipped with a self-lubricating device, in which an oil disc 3 is mounted on one side of a sliding bearing 2 that supports a rotating shaft 1, surrounding these members, and the sliding bearing 2 is a bearing. It is supported by box 4.

The structure of the oil disc 3 will be described later, but this oil disc 3 rotates together with the rotating shaft 1, pumps up lubricating oil 5 stored in the lower part of the bearing box 4, and pumps up the lubricating oil 5 stored in the lower part of the bearing box 4. 6 to the bearing 2 side and flow into the oil supply lower of the bearing 2.

Next, referring to FIG. 2, the oil disc 3 will be explained.
A protruding flange 8 is formed on a part of the rotating shaft 1, and an annular inner shaft 9 is fitted onto the outer periphery of the flange 8.

A concave raceway 9a is formed on the outer periphery of the inner shaft 9, an outer shaft 14 is provided on the outside of the inner ring 9 via an annular layer 10, and a concave raceway 14a is also formed on the inner periphery of the outer ring 14. It is formed. The annular layer 10 is fitted into the raceway between the inner and outer rings 9 and 14, and maintains a distance between a plurality of rolling elements 11 made of spheres that can be moved in the circumferential direction and these adjacent rolling elements 11.

It consists of a cage 12 that slidably encloses the rolling elements 11 on both sides, and an annular disk 13 with a smooth outer periphery that is integrated with the cage 12 and can rotate together with the cage 12.

Further, a groove is provided in the upper part of the outer ring 14.

A bottle 16 protruding from the oil paddle 6 is inserted to prevent rotation of the outer shaft 14.

The immersion position of the oil disk 3 and the lubricating oil 5 configured in this way is such that the oil level OL is set above the outer peripheral surface of the lowermost portion of the disk 13.

Next, the operation of the bearing device configured in this way will be explained.

First, when the rotating shaft 1 rotates, the inner shaft 9 also rotates at the same rotational speed, and when the inner shaft 9 rotates, the rolling elements 11 in contact with it rotate on their orbits at a slower rotational speed than the rotating shaft 1. It revolves around. As the rolling element 11 revolves, the retainer 12 and disk 13 attached thereto also revolve at the same rotational speed as the rolling element 11. As a result, the disk 13 whose lower part is immersed in the lubricating oil 5 rotates at a speed slower than the rotational speed of the rotation 1111 and pumps up the oil.

This rotational speed has conventionally been empirically formulated based on the size of each member, but it can be approximately 40 to 50% of the rotational axis.

Next, the oil scraped up by the disk 13 is transferred to the disk 1
The oil is scraped off by an oil scraper 6 installed on the top of the disk 3 with a small gap between it and the outer periphery of the disk, and is reliably guided to the bearing 2 side.

The basic structure of this oil paddle is the same as the conventional shaft-integrated oil disc type.

According to the present invention, the disc 13 that scrapes up the lubricating oil rotates at a speed slower than the rotational speed of the shaft 1, so a certain range of unusability in the low speed region is unavoidable due to the characteristics of revolution. Not only does this increase the range of application in high-speed areas, but it also provides a simple and reliable means of scraping oil from the oil disk, which increases the amount of oil supplied compared to the conventional scraping method using rolling elements and a cage, further expanding the range of use. This improves lubrication reliability.

In the above embodiment, an example was explained in which the inner shaft 9 was fitted to the collar 8 of the nine-rotation shaft 1, but the collar 8 and the inner shaft 9 may be integrated, and the outer shaft 14 and the bearing may be integrated. It may also be integrated with the box 4.

Also, the orbit of either the outer shaft 14 or the inner shaft 9 (9a
Alternatively, 13a) may be omitted to form a smooth groove, and the shape of the groove is not particularly defined.

Further, the rolling element 11 is not limited to a spherical body, and may be cylindrical.

〔Effect of the invention〕

As described above, according to the present invention, in a bearing device that supplies lubricating oil from an oil reservoir in a bearing box to a bearing that supports a rotating shaft, the oil disk is connected to a plurality of rolling elements disposed on the outer periphery of the rotating shaft. It consists of a holding part that holds this rolling element on the outer periphery of the rotating shaft, and a disk that is engaged with this holding part and inserted into the rotating shaft, and the base end is fixed to the bearing and covers the outer periphery of the disk. By installing an oil scraper at the end that supplies the lubricating oil that has been scraped up onto the disk surface to the bearing, the lubricating oil in the oil sump is scraped up by the disc that rotates at a reduced speed, and this scraped up lubricating oil is scraped up and supplied to the bearing. Therefore, it is possible to obtain a bearing device that can efficiently supply lubricating oil to the bearing.

[Brief explanation of drawings]

FIG. 1 is a partially broken vertical sectional view showing one embodiment of the bearing device of the present invention, FIG. 2 is a detailed perspective view of a portion of FIG. 1, and FIG. 3 is an enlarged perspective view showing the main parts of the bearing device of the present invention. It is a diagram. 1... Rotating shaft 2... Bearing 3... Oil disc 4... Bearing box 6... Oil paddle
11...Rolling element 12...Cage
13... Disc Figure 1 (8733) Agent Patent Attorney Yoshiaki Inomata (1 person) Figure 2

Claims (1)

[Claims] In a bearing device that supplies lubricating oil from an oil sump in a bearing box to a bearing that supports a rotating shaft using an oil disk, the oil disk is connected to a plurality of rolling elements disposed on the outer periphery of the rotating shaft, and the rolling elements are connected to each other. It consists of an annular holding part held on the outer periphery of the rotating shaft, and a disk that is engaged with the holding part and inserted into the rotating shaft, and the base end is fixed to the bearing and covers the outer peripheral surface of the disk. A bearing device characterized in that an oil paddle is provided at the other end to supply the lubricating oil scraped up onto the disk surface to the bearing.