JPS6210557Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bearing oil supply device, and particularly to a bearing oil supply device using an oil ring.

A conventional oil supply device of this kind is shown in FIGS. 1 to 3, and has a two-piece structure with a rotating shaft 1 and a bearing 2, the bearing surface of which is covered with a bearing metal 2a. 3 is an oil ring located in the notch 2b of the bearing 2.
The lubricating oil is passed through the bearing 2 and placed on the rotating shaft 1, and rotates as the rotating shaft 1 rotates, scraping up lubricating oil from the oil reservoir 4 and supplying the lubricating oil between the bearing 2 and the rotating shaft 1. There is. The oil ring 3 is supported by the side wall 2c of the notch 2b so as not to dance, but since the contact area between the side wall 2c and the oil ring 3 is large, it is difficult for the oil ring 3 to rotate. The amount of lubricating oil pumped up is small, and wear particles from contact with the oil ring 3 are transferred to the bearing 2.
There was a problem in that it entered between the rotary shaft 1 and the rotary shaft 1 and prevented smooth rotation of the rotary shaft 1. Also, the lubricating oil pumped up by the oil ring 3 is shown in Figure 3 with the symbol m.
As shown in Figure 2, the problem was that the amount of oil required was small due to scattering.

The present invention has been proposed to overcome the drawbacks of the conventional ones, and an embodiment shown in FIGS. 4 to 6 will be described below. In the figure, 1 is a rotating shaft, 2 is a bearing, 2a is a bearing metal, 2b is a notch, 3 is an oil ring, and 4 is an oil reservoir, which are the same as those of the above-mentioned conventional device.
5, the rotation shaft 1 is attached to the notch 2b as shown in FIG.
The supporting plates are provided facing each other on both sides of the rotating shaft with a gap between them, and the shape of the supporting plates are parallel to each other forming the oil ring passage 5a as shown in Fig. 6. It has a mold shape with leg parts 6 on the left and right sides. Note that the distance l between the parallel legs 6 is set to be slightly larger than the width _l1 of the oil ring 3. The support plate 5 has a small support surface 5b facing the side surface of the oil ring 3, and an oil reservoir 5c is formed in the upper part of the support surface 5b. An oil groove 5d communicating with this oil reservoir 5c and extending toward the gap between the bearing 2 and the rotating shaft 1 is provided on the surface of the leg 6 facing the rotating shaft. In this embodiment, the opposing support plate 5 is integrally molded with the bearing metal 2a mounted on the bearing surface of the upper bearing 2' of the two-piece bearing, but is made of wear-resistant material such as resin. A support plate made of the same material may be formed by fitting into the notch 2b.

In the device of the present invention, support plates with parallel legs that form a passage for the oil ring are provided in the notch facing each other across the rotating shaft. The oil ring is not supported by the side wall 2c of the notch, but is supported by the support plate of the mold, and the support surface facing the side surface of the oil ring is made smaller, so the contact surface of the oil ring is smaller than that of conventional ones. becomes significantly smaller. Therefore, since the rotational speed of the oil ring can be increased, the amount of lubricating oil pumped up can be increased. Moreover, since an oil sump is formed on the upper part of the support plate of the mold, when the lubricating oil that adheres to the outer peripheral surface of the oil ring and is pumped up is scattered, it is captured in this oil sump. The lubricating oil captured by the lubricating oil is guided by the oil groove provided in the leg portion of the support plate provided along the rotating shaft communicating with this oil reservoir and is all supplied to the bearing surface, thereby improving the lubrication effect. Furthermore, since the support plate is made of a wear-resistant material, wear can be reduced, and since the contact area with the oil ring is small, there is no risk of abrasion powder entering the bearing surface and interfering with smooth rotation of the rotating shaft.

[Brief explanation of the drawing]

Figures 1 to 3 show conventional oil supply devices,
1 is a perspective view, FIG. 2 is a partially cutaway front view, and FIG. 3 is a sectional view taken along the line - in FIG. 2. 4 to 6 show an embodiment of the present invention, FIG. 4 is a diagram corresponding to FIG. 2, and FIG. 5 is a diagram corresponding to FIG.
The figure is a sectional view taken along line V-V in Figure 4,
The figure is a perspective view of main parts. 1: Rotating shaft, 2: Bearing, 2b: Notch, 3:
Oil ring, 4: Oil reservoir, 5: Support plate, 5a:
Oil ring passage, 5b: support surface, 5c: oil reservoir, 5d: oil groove, 6: leg.

Claims (1)

[Scope of utility model registration request] It passes through the notch in the bearing and is placed on the rotating shaft.
In an oil supply device using an oil ring that rotates with the rotating shaft to scrape up lubricating oil from an oil reservoir and supply oil between the bearing and the rotating shaft, a passage for the oil ring is formed in the notch. A support plate having parallel legs is provided opposite to each other so as to sandwich the rotation shaft from both sides, and the support plate has a small support surface facing the side surface of the oil ring, and an oil reservoir on the top. A bearing oil supply device characterized in that an oil groove is provided in the leg portion and communicates with the oil reservoir portion and extends toward a gap between the bearing and the rotating shaft.