JPS60104814A - Self-lubricating construction of slide bearing - Google Patents

Abstract

PURPOSE:To enable a bearing of being used for a long term without any need of lubrication by fitting a lubricating oil keeping member on the back face of the bearing face of a bearing member having an oil hole. CONSTITUTION:A radial oil hole 4a is formed in a bearing member 4 supporting a shaft 11. The external sleeve lubricating oil keeping member 1 is externally engaged on the bearing member 4 and fixed thereon so as to make the oil hole 4a communicate with the oil groove or oil stay 1a on the external sleeve lubricating oil keeping member 1. As a shaft 11 makes friction action, lubricating oil kept by the external sleeve lubricating oil keeping member 1 is supplied on the bearing face from the oil hole 4a of the bearing member positioned at the part where a negative pressure is produced from oil film, thereby reducing slide friction resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-lubricating structure for a veneer bearing in which the bearing has a double structure, retains lubricating oil, and supplies the lubricating oil to the bearing surface to reduce sliding frictional resistance.

BACKGROUND ART Conventionally, as a self-lubricating bearing, there is a bearing made of a sintered alloy mainly made of copper-based or iron-based metal powder, as shown in FIG. 1 (a) and middle).

100 shown in Fig. 1 (a) is a sintered oil-impregnated bearing in which metal powder is placed in a mold, press-sintered to form a cylindrical shape, and the cavities between the sintered particles are impregnated with lubricating oil. 101 shown in FIG. 1(b) is a metal powder that is sprinkled on the inner circumferential surface of a cylindrical back metal 101a made of a steel plate, sintered, and the pores between the sintered particles are impregnated with resin and lubricating oil. Porous powder sintered layer 101b
This is a sintered oil-impregnated bearing with a metal backing formed on the bearing surface.

Further, examples of ordinary sliding bearings that supply lubricating oil from the outside include the bearings shown in FIGS. 2(A) and 2(B).

102 shown in Fig. 2 (a) is a half-split type bearing;
2a is a backing metal, and 102b is a bearing base metal.

An oil hole 102c is drilled therein. Some bearings have oil grooves or holes (not shown) formed on the bearing surface side in continuity with the oil hole 102c.

Figure 2 (103 shown in opening j is a bushing type bearing, 103a is a back metal, and 1oab is a bearing alloy''C.The oil hole 103C is drilled through the back metal 103a. Oil hole 103C Some bearings have oil grooves or depressions (not shown) formed on the bearing surface in continuation with the bearing surface.

Ordinary flat bearings have oil holes 102C or 1 as shown above.
03c etc. are provided to supply lubricating oil to the external υ bearing surface to reduce the external frictional resistance.

By the way, in the case of a bearing made of a sintered alloy as shown in FIG.

The reason for this will be explained below.

Since the sintered oil-impregnated bearing 100 is put into a mold and compression-molded, it is impossible to form oil grooves or holes on the inner circumferential surface thereof, and bearing materials are limited.

When oil grooves and recesses are press-formed on the sintered oil-impregnated bearing with backing metal 101, the voids between the sintered particles are destroyed and the adhesion is impaired.
In the case of bearings made of sintered alloy, which are self-lubricating bearings, it is necessary to supply lubricating oil to the bearing surface for a longer period of time than the current situation, and improve the lubrication performance. This cannot be expected, and in the case of ordinary plain bearings, it is necessary to separately provide a lubricating device and a lubricating pipe.

The present invention has a bearing material made of a normal material and in a normal shape that receives a large load, and a lubricating oil, and the lubricating oil is applied to the bearing surface by fitting it externally or internally onto the back surface of the bearing surface of the bearing material. As a double structure that can supply lubricating oil to the sliding bearing itself without installing an oil supply pipe, it can be used without replenishing lubricating oil for a long period of time and reduces frictional resistance. The purpose of the present invention is to provide a self-lubricating structure for a flat bearing.

The present invention will be described with reference to illustrated embodiments.

Figures 3 (A) and (B) show the lubricating oil retaining member.
Figure (A) shows a lubricating oil retaining member 1 for an outer cylinder, in which an oil groove or an oil reservoir 1a is formed on the inner peripheral surface of the cylindrical body.

FIG. 3(b) shows a lubricating oil retaining member 2 for an inner cylinder, in which an oil groove or an oil reservoir 2a is formed on the outer peripheral surface of the cylindrical body. Outside/
The material of the lubricating oil retaining members 1 and 2 for the inner cylinder is not limited to metal, and synthetic resins or composite materials such as synthetic resins, ceramics, hanging chains, and metals may also be used.

Figure 4 shows a lubricating oil retaining member 3 that can be used as both an inner and outer cylinder, and is made of porous material such as porous metal powder sintered material to compensate for its strength. It is impregnated and retained.

FIG. 5 and subsequent figures show an embodiment of a self-lubricating structure for a double-sided bearing in which each of the lubricating oil retaining members 1, 2.3 is combined with a bearing material to form a double structure.

FIG. 5 shows a first embodiment. 10 is a housing, and 11 is a shaft. 4 is a bearing material that supports the shaft 11, and is provided with a radial oil hole 4a.

Then, the lubricating oil retaining member 1 for the outer cylinder is fitted onto the bearing material 4 and fixed, and the oil hole 4a is communicated with the oil groove or oil reservoir 1a' of the lubricating oil retaining member 1.

The inner circumferential surface of the bearing material 4 is provided with oil grooves and depressions (not shown) in the same way as a normal flat bearing. Before supporting the shaft 11, lubricating oil is injected into the through hole 4a and the oil groove or oil reservoir 1a. Therefore, the lubricating oil held by the lubricating oil retaining member 1 for the outer cylinder is transferred to the oil hole 4 of the bearing material located in the part where negative pressure is generated in the oil film pressure with the sliding movement of the shaft 11 It is supplied to the bearing surface through grooves and depressions to reduce frictional resistance. Since it contains a larger amount of lubricating oil than conventional sintered alloy bearings, good lubrication performance can be obtained over a long period of time.

FIG. 6 shows a second embodiment. Reference numeral 2 denotes a lubricating oil retaining member for the inner cylinder, which is slidably fitted onto the inner circumferential surface of the hollow pipe 12 or communicated with the oil reservoir 2a, and is fixed therein. Then, the inner circumferential surface of the lubricating oil retaining member 2 is fitted and fixed onto the shaft 10'a of the housing 1o'. Note that the outer circumferential surface of the bearing material 4' is provided with oil grooves and depressions (not shown) in the same manner as in ordinary sliding bearings. Before inserting such an assembly into the hollow pipe 12, the fabric holes 4 are
``a'' Inject lubricating oil into the oil groove or oil sump 2a.

Therefore, it has the same effect as the first embodiment shown in FIG.

Note that on the two sides, there is an oil hole 4a or 4'a.

A felt material may be inserted into the oil groove or oil reservoir 1a or 2a and impregnated with lubricating oil to supply oil to the bearing surface by capillary action.

FIG. 7 shows a third embodiment in which a lubricating oil retaining member 3 for both inner and outer cylinders is incorporated.

In FIG. 7(a), 10 is a housing, and 11 is a shaft. Reference numeral 3 denotes a lubricating oil retaining member made of porous metal powder sintered material and serving as both an inner and outer cylinder, and is fixed to the inner circumferential surface of the metal plate back metal plate 3b. 4 is a bearing material that directly supports the shaft 11, and is fitted and fixed to the inner circumferential surface of the lubricating oil retaining member 3, which serves both as an inner and outer cylinder, and 4a is an oil hole, which is connected to the bearing surface. This is because oil grooves, depressions, etc. are formed. Therefore, the lubricating oil impregnated in the lubricating oil retaining member 3 for both inner and outer cylinders is supplied to the oil hole 4a and the υ bearing surface as the temperature rises due to the sliding movement of the shaft 11. It has similar effects.

7(b), (c), and 7) show other structural examples of the third embodiment, in which 10 is a housing, 11' is an annular stepped portion 11'a
This shows the case where the bearing receives a thrust load.

In FIG. 7(b), 3 is a lubricating oil retaining member for both the inner and outer cylinders, 3b is a backing plate made of a metal plate, and a flange 4C is provided on the bearing material 4 having a through hole 4a to form an annular step 11'a. They are placed in contact to receive thrust loads.

Figure 7 ← Of the symbols in J, the same symbols as in Figure 7 (b) indicate the same parts, and like the collar 4C of the bearing material, the lubricating oil retaining member 3 that serves both as an inner and outer cylinder and the metal plate back plate 3b also have collars. A section 3c is provided.

Of the symbols in FIG. 7), the same symbols as in FIG. A different annular member 5 is fixed to the end face of the lubricating oil retaining member 3 which serves both as an inner and outer cylinder.

Therefore, the structural examples shown in Figures 7(b), (c), and 7) also receive thrust loads and have the same effects as the third embodiment, but the structural examples shown in Figure 7(e) and 7) If so, by providing the collar portion 3c or the annular member 5 on the lubricating oil retaining member 3 that serves both as an inner and outer cylinder, it is possible to retain an extra amount of lubricating oil.

FIG. 8(a) shows a fourth embodiment in which no backing metal is used in the lubricating oil retaining member 3 that serves both as an inner and outer cylinder.

10 is a housing, 11 is a shaft, 4 is a bearing member having a through hole 4a, and a lubricating oil retaining member 3 for both inner and outer cylinders is directly fitted and fixed to the inner peripheral surface of the housing 10.

FIG. 8(b) shows a fifth embodiment in which the back metal and the cover are used together. Both end surfaces of the lubricating oil retaining member 3 which serves as both an inner and outer cylinder are covered with a cover 13 having inward flange portions 13& on both sides, and the lubricating oil retaining member 3 is attached to the housing 10.
The cover 13 is fitted and fixed to the inner circumferential surface of the cover 13 to prevent lubricating oil from scattering.

Therefore, the fourth and fifth embodiments have the same effects as the third embodiment.

FIGS. 9A and 9B show a sixth embodiment in which the lubricating oil retaining member 3 serving as both an inner and outer cylinder is used as an inner cylinder. 1
0' is a /・Using, 12 is a hollow nozzle, and 4' is a bearing material that slides on the inner peripheral surface of the hollow pipe 12. One or two
There are two oil holes 4'a.

Reference numeral 3 denotes a lubricating oil holding member for both inner and outer cylinders that is fitted and fixed to the inner peripheral surface of the bearing material 4', and in FIG. 9(a), the lubricating oil holding member 3 is a metal Plate back metal 3
b' to the shaft 10'a of the lubricating oil retaining member 3, and in FIG. Mandou tO'a
It is fitted and fixed.

Therefore, it has almost the same effect as the second embodiment. In the self-lubricating structure of the flat bearing according to the present invention, a lubricating oil retaining member is fitted onto the outer circumferential surface or inner circumferential surface of the bearing material having oil holes, which is the back surface of the bearing surface.

Therefore, lubricating oil can be easily supplied to bearing materials with conventional bearing surfaces that have oil grooves and depressions, and the lubrication performance is improved compared to conventional self-lubricating bearings that do not have oil grooves or depressions. It is possible to maintain good lubrication performance over a long period of time, and compared to conventional plain bearings, an oil supply device and complicated oil supply pipes can be omitted.

[Brief explanation of the drawing]

Figure 1 (a) is a perspective view of a conventional sintered oil-impregnated bearing;
B) is a perspective view of a conventional sintered oil-impregnated bearing with a back metal, FIG. 2A is a perspective view of a conventional half-split type bearing, FIG. 2B is a perspective view of a conventional bushing type bearing, and FIG. Figure (a) is a perspective view of a lubricating oil retaining member for the outer cylinder according to the present invention, Figure 3 (b) is a perspective view of a lubricating oil retaining member for the inner cylinder, and Figure 4 is a lubricating oil retainer for both the inner and outer cylinders. FIG. 5 is a perspective view of the members, and FIG.
The figure is a sectional view showing the second embodiment, Figures 7 (a) and (b).
, H1) are cross-sectional views showing the third embodiment, and eighth embodiment.
Figure (A) is a cross-sectional view showing the fourth embodiment, Figure 8 (B) is a cross-sectional view showing the fifth embodiment, and Figures 9 (A) and (B) respectively show the eighth embodiment. FIG. 1: Lubricating oil retaining member for outer cylinder, 1a: Oil groove or oil reservoir, 2:
Lubricating oil holding member for inner cylinder, 2a: Oil groove or oil reservoir, 3: Lubricating oil holding member for both inner and outer cylinders (porous metal powder sintered material), 3b
, 3'b: Metal plate back metal plate, 3c: Flange part, 4, 4'
: Bearing material, 4a, 4'a: Oil hole, 5: Annular member, 10
, 10': Housing, 10'&: Mandrel, 11 , 11
': shaft, LL'a: annular step, 12: hollow pipe, 1
3: Cover. Representative Patent Attorney Front 1) Interest 2 Figure 1 (A) (B) (B) (0) Figure 3 (A) (B) Figure 4 Figure 5 Figure 6 +U'o')'OIU' In

Claims (1)

[Claims] '1. A self-lubricating structure for a BEF bearing, characterized in that a lubricating oil retaining member is fitted onto the outer circumferential surface or inner circumferential surface of a bearing material having oil holes, which is the back surface of the bearing surface. 2. A self-lubricating structure for a flat bearing as set forth in claim 1, wherein the lubricating oil retaining member forms an oil groove or an oil reservoir for retaining lubricating oil on the inner peripheral surface or outer peripheral surface of the cylindrical body. . 3. The lubricating oil retaining member is made of porous metal powder sintered material,
A self-lubricating structure for a flat bearing according to claim 1, wherein the cavity contains lubricating oil.