JPS6350487Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a lubricating bearing that supports a shaft and ensures fluid lubrication.

PRIOR ART Conventionally, an oil ring type is known as a fluid lubrication method for a rotating shaft.
As shown in the figure, an oil chamber 13 is provided in a bearing body 12, and lubricating oil is stored in this oil chamber 13. The lower part of a ring 15 wound around a shaft 14 supported by the bearing body 12 is immersed in the lubricating oil. When the shaft 14 is rotated, the ring 15 rotates.
5 rotates, drawing up the lubricating oil in the oil chamber 13 and
4, forming an oil film between the shaft 14 and the bearing body 12, thereby providing good lubrication.

Problems to be Solved by the Invention In the conventional lubrication system described above, the oil chamber 13 is open, so when it is used for a bearing of a machine that moves or swings, it is difficult to prevent the bearing from moving or swinging. body 1
2 tilts, lubricating oil spills and lubrication becomes impossible, which may cause seizing of the shaft 14. In addition, dust may enter the lubricating oil and easily damage the shaft 14 and bearing body 12, as well as damage the bearing. However, due to its large size, it was expensive and difficult to use.

The present invention was developed to solve the above problem, and the lubricating oil is stored in the annular oil chamber of the bearing body, and the lubricating oil is applied to the shaft using balls or rollers to move and swing. To provide a lubricated bearing that prevents lubricating oil from spilling and dust from entering the lubricating oil even when used in a machine bearing.

Means for Solving the Problems The lubricated bearing according to the present invention is shown in Figures 1 to 4 of the drawings.
As shown in the embodiment shown in the figure, there is a bearing body 1 that rotatably supports a shaft 2, an annular groove 4 provided in the inner periphery of the bearing body 1 so as to partially open, and a shaft 2 accommodated in the annular groove 4. and a ball or roller 6 having a portion in contact with the shaft 2, and an annular oil chamber 7 provided in the bearing body 1 in communication with the annular groove 4 and containing lubricating oil. It is something.

Operation In the lubricating bearing constructed as described above, when lubricating oil is supplied to the annular oil chamber 7, this lubricating oil enters the narrow passage 10 by capillary action and stops facing the annular groove 4.

Therefore, when the shaft 2 supported by the bearing body 1 is rotated in this state, the ball or roller 6 accommodated in the annular groove 4 and in contact with the shaft 2 rotates following the shaft 2, lubricating the passage 10. The oil is extracted, the extracted lubricating oil is applied to the circumferential surface of the shaft 2, and the shaft 2 and the bearing body 1 are bonded together.
It forms an oil film between the two and provides smooth fluid lubrication.

Examples Examples of lubricated bearings according to the present invention will be described below with reference to the drawings.

Drawings 1 and 2 show an example of implementation, and in these figures, 1 is a bearing body, which is formed into an arbitrary shape from synthetic resin or metal, and a shaft 2 is fitted inside it. A hole 3 is provided.

Reference numeral 4 denotes an annular groove provided on the inner periphery of the bearing body 1, a portion of which is opened into the hole 3 described above, and is formed in a cross-sectional shape that accommodates a ball or roller described later. A ball or roller exit edge 5 is provided.

Reference numeral 6 denotes a ball or roller housed in the annular groove 4, with a part of its peripheral surface in contact with the shaft 2 within the opening described above, and the ball or roller 6 is made of an elastic material such as synthetic resin or rubber. It may be formed of a material and pressed against the shaft 2 by elasticity, or it may be formed of a magnetic material, or it may be formed of a material mixed with a magnetic material and attracted to the shaft 2 by magnetic force to maintain contact with the shaft 2. It is set as.

Reference numeral 7 denotes an annular oil chamber provided outside the annular groove 4 in the bearing body 1, and an oil filler port 9, which is opened and closed by a lid 8, is provided in the upper portion when in use. An oil chamber 7 is provided between the annular groove 4 and the annular groove 4.
A narrow passage 10 is provided through which lubricating oil therein is extracted into an annular oil chamber 7 by capillary action.

Therefore, in this embodiment, the lubricating oil is applied to the shaft 2 by the balls or rollers 6 only in the center of the bearing body 1, and the applied lubricating oil flows to both sides to lubricate the entire surface. The example is suitable for short bearings.

FIG. 3 shows another embodiment, in which a porous and elastic oil-containing material 11 such as felt or sponge is accommodated in an annular oil chamber 7 provided in a bearing body 1.
This is impregnated with lubricating oil, and an appropriate amount of this lubricating oil is applied to the ball or roller 6, and the oil-impregnated material 1
If the ball or roller 6 is pressed against the shaft 2 by the elasticity of 1, the ball or roller 6 can be made of ordinary metal,
It can be made of synthetic resin.

In this embodiment, the bearing body 1 is divided into two vertically or horizontally to accommodate the oil-containing material 11.

FIG. 4 shows still another embodiment. Since the bearing body 1 is long, an annular groove 4 formed on the inner circumference thereof,
An annular oil chamber 7 communicating with this annular groove 4 through a passage 10 is provided diagonally so as to extend from one end of the bearing body 1 to the other end.

In this embodiment, when the shaft 2 is rotated, the balls or rollers 6 follow the shaft 2 and roll in the annular groove 4, receiving the lubricating oil extracted into the passage 10,
Since the lubrication operation is performed over almost the entire length of the shaft 2 supported by the bearing body 1, the lubrication of the long portion is evenly and reliably performed.

Effects of the invention The lubricated bearing according to the invention stores lubricating oil in an annular oil chamber inside the bearing body, and extracts this lubricating oil with balls or rollers rolling in an annular groove that communicates with the oil chamber through a passage. Not only does this ensure fluid lubrication of the shaft, but even if the bearing is used in a machine that moves or swings, the lubricant will not spill and become unable to lubricate. This prevents dust from entering inside and damaging the shaft or bearing body.

In particular, this bearing has an oil chamber and grooves in which the balls and rollers roll concentrically within the bearing body, making it compact overall, inexpensive, and easy to use, as well as having a large lubricating oil capacity. This has the unique effect of smoothly supplying lubricating oil to the balls, balls, and rollers.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an example of an implementation of a lubricated bearing according to the present invention. Figure 2 is a side view of the same as above. FIG. 3 is a partially enlarged longitudinal sectional side view showing another embodiment. FIG. 4 is a longitudinal sectional front view showing still another embodiment. FIG. 5 is a longitudinal sectional side view of a conventional bearing. In the figure, 1 is a bearing body, 2 is a shaft, 4 is an annular groove, 6 is a ball or roller, and 7 is an annular oil chamber.

Claims (1)

[Scope of utility model registration request] A bearing body that rotatably supports a shaft, an annular groove provided in the inner periphery of the bearing body so that a portion thereof is open, and a ball or roller accommodated in the annular groove and partially in contact with the shaft. and an annular oil chamber that is provided in the bearing body in communication with the annular groove and contains lubricating oil.