JP2000035042A - Lubricating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely supply a lubricating material to a contact surface, regardless of clearance between two solid bodies performing relative motion, by providing a recess by arranging many fine cavities on either one or both of contact surfaces of the two solid bodies performing relative motion and filling a lubricating material within each cavity. SOLUTION: Super finishing is performed for a surface TA (a contact surface or a slide surface) of a solid body T constituted by using steel so that surface roughness may be 0.03 Ra or below. A recess is provided by arranging many cavities P... of micron order forming a substantially semi-spherical shape in cross section by laser working on the surface TA or the surface TA for which various kinds of surface processings (soft nitriding, ion nitriding, TiN, CrN, etc.). A diameter R of each cavity P... is made 0.1 mm or below and a depth X is made 0.03 mm or below to be extremely fine. Within each cavity P, lubricant S of various kinds of lubricating oil such as spindle oil, dynamo oil and cylinder oil is supplied and filled. As a result, relative motion of two solid bodies T, H is smoothly performed under extremely small frictional resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device suitable for a contact surface (slide surface) of a bearing or various operating mechanisms.

[0002]

2. Description of the Related Art When there is a relative movement between two solids, such as a bearing, a lubricating device is conventionally used to make an oil film on the contact surface to reduce friction. Wear and heat generation are reduced, and lubricating oil is continuously supplied to the above-mentioned contact surface (lubricating device) through a lubricating system including an oil tank, a pump, piping, and the like. It is also practiced to circulate and recover.

[0003]

However, the supply of lubricating oil to the contact surface by the lubrication system and the lubricating device described above requires a certain amount of clearance (gap) between the two solids that perform relative motion. It is possible, but in the case of a close contact state with little clearance, sufficient lubricating oil and
It is difficult to supply them evenly, and as a result, there arises a problem that the frictional resistance increases and affects the relative motion, and the contact surface (slide surface) is damaged due to increased wear and heat generation. Was.

[0004] Therefore, the technical problem of the present invention is to provide a reliable and full lubrication of the contact surface regardless of the amount of clearance provided between two solids performing relative motion. It is to supply them evenly so that the relative movement of the two solids can be carried out smoothly with very little frictional resistance.

[0005]

Means taken by the present invention to solve the above-mentioned technical problems are as follows.

(1) A large number of minute dents are arranged and formed on one or both contact surfaces of two solids that perform relative motion, and a lubricant is supplied and filled into each of these dents. To configure. (Claim 1)

(2) A large number of minute depressions are formed in the contact surface of the solid and arranged in a pattern in accordance with the sliding direction of the solid. (Claim 2)

(3) The surface roughness of the solid contact surface is 0.03
Ra not more than 0.1 mm on the surface or a treated film on this surface which has been subjected to surface treatment.
A large number of small depressions having a cross section of approximately semi-spherical shape with a depth of at least 0.03 mm or less shall be arranged and recessed. (Claim 3)

[0009]

According to the means of the first aspect described in the above (1), a large number of minute depressions are formed in the contact surface, and a lubricant is supplied and filled into each of these depressions. Regardless of the amount of clearance between the two solids, a sufficient amount of lubricant is always uniformly supplied to the contact surface, and the relative movement of the two solids is performed smoothly with very little frictional resistance. And the contact area can be made as small as possible by providing a large number of minute depressions, so that the frictional resistance during the relative movement is further reduced, and the relative movement is performed with relatively little force. Make it possible to do it smoothly.

According to the means according to claim 2 described in the above (2), a pattern in which a large number of minute depressions are aligned with the sliding direction of the solid, that is, when the solid slides in the vertical and vertical directions, each depression is formed. When sliding in the horizontal or diagonal direction in a pattern arranged in the vertical and vertical directions, each dent is formed in a pattern arranged in the horizontal or diagonal direction, and lubrication is applied to these dents. The material being filled allows the solid to slide very smoothly along the arrangement of these depressions with little frictional resistance.

According to the means of claim 3 described in the above (3), the steel surface is super-finished so that the surface roughness is 0.03 Ra or less, or the steel surface is super-finished. Further, on the surface-treated film subjected to various surface treatments, a number of microscopic dents (micrometer order: 0.1 mm or less, depth: 0.03 mm or less) are formed by laser processing or the like, and each of these dents is formed. Since lubricating oil (lubricating oil) is supplied and filled, lubrication can be optimized, and an excellent effect on rust countermeasures can be exhibited.

As described above, the above (1) to (1)
By solving the above technical problem by means of (3),
The problem of the conventional technique can be solved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lubricating device according to the present invention will be described below with reference to the drawings. FIG. 1 shows a side cross-sectional view of a solid T embodying the present invention. The surface TA (contact surface or slide surface) of this solid T is super-finished so that the surface roughness becomes 0.03 Ra or less, and the surface TA or various surface treatments (soft nitriding, ionizing On the treated film of this surface TA which has been subjected to nitriding, TiN, CrN, etc.), a large number of micron-order depressions P having a substantially hemispherical cross section are formed by laser processing or the like.
Are recessed side by side.

FIG. 2, FIG. 3 and FIG. 4 show pattern examples (arrangement examples) of the fine depressions P... When the solid T slides in the oblique direction shown in FIG. 2, the depressions P are recessed. In the case where the solid T slides in the vertical and horizontal directions, the rectangular shape shown in FIG. ) Are recessed in the pattern of FIG. 4), and further, when the solid T slides in the radial direction, the recesses P are recessed in the radial pattern shown in FIG. The pattern is an example of the embodiment, and the above three types of patterns may be combined according to the sliding state of the solid T, or a curved pattern (not shown) may be used.

The diameter R (see FIG. 2) of each of the depressions P... Is 0.1 mm or less, and the depth X (see FIG. 1) is 0.03.
5 mm or less, each of which has a lubricating material S made of various lubricating oils such as spindle oil, dynamo oil or cylinder oil as shown in the enlarged sectional view of FIG. .. Are supplied and filled.

In FIG. 5, H is the other solid which is provided so as to be relatively movable (slidable) with respect to the one solid T. In the case shown in FIG. Is formed only on the surface TA (contact surface) of one solid T,
Although the surface (contact surface) of the other solid H is formed in a planar shape, this is an example of the embodiment, and the depressions P ... filled with the lubricant S may be formed on the surface of the other solid H. The selection is optional.

The supply of the lubricant S into each of the depressions P is performed by using a lubrication system (not shown) including a conventionally used oil tank, pump, piping, and the like. This is merely an example, and there may be a case where the supply and filling are performed by applying coating or other supply means, and the selection is arbitrary.

In FIG. 6, reference numeral 1T denotes a shim material for adjusting the clearance of the valve lifter in which the lubricating device of the present invention described above is implemented on its surface 1A. This shim material 1T is shown in FIG. As shown in FIG. 2 of Japanese Patent No. 37720, by mounting the intake / exhaust valve of the engine on the upper end 3A of the valve lifter 3 which is pushed by a rotating cam (not shown), the cam with respect to the valve lifter 3 is moved. The mechanism is such that the error between the pressing force and the pressing timing can be adjusted.

FIGS. 7 and 9 show the shim material 1 described above.
FIG. 4 shows a configuration in which the lubricating device of the present invention is directly implemented on the upper surface 2A of the valve lifter 2T without using T.
According to each of the embodiments shown in FIGS. 6 to 9, a large number of minute depressions P are arranged and recessed on the upper surface 1A of the shim material 1T or the upper surface 2A of the valve lifter 2T. As shown in FIG. 5, each recess P is supplied and filled with a lubricant S. As a result, the valve lifter 3 or 2T is smoothly pressed by the rotating cam with little frictional resistance, and the valve shaft 4 is pressed. The opening / closing operation of the intake / exhaust valve (not shown) of the engine can be reliably performed.

[0020]

As described above, according to the lubricating apparatus according to the present invention, a number of minute dents are arranged and formed on the contact surface of the solid that performs relative motion, and each of these dents is made of lubricating oil or the like. Since the lubricant is supplied and filled, it is necessary to always maintain a state in which a sufficient amount of lubricant is supplied to the contact surface (slide surface) regardless of the clearance between the two solids. As a result, the relative movement of the two solids can be performed smoothly with very little frictional resistance, thereby preventing a failure or breakage accident due to friction or heat generation.

In addition, according to the present invention, since the contact area (friction area) between the solids is extremely small due to the formation of a large number of minute depressions, the frictional resistance can be further reduced. It can be applied to various contact surfaces such as the rotating part of a valve lifter device or a motor, or the movable part of a press machine, or the sliding part of an industrial robot to optimize lubrication and prevent rust. Can also exert excellent effects.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a part of a solid in which a lubricating device according to the present invention is implemented.

FIG. 2 is an explanatory diagram showing an example of a pattern in which dents are arranged in an oblique direction.

FIG. 3 is an explanatory diagram showing an example of a pattern in which depressions are arranged in a rectangular shape.

FIG. 4 is an explanatory diagram showing an example of a pattern in which depressions are arranged in a radial direction.

FIG. 5 is an enlarged sectional view showing a main part of the present invention.

FIG. 6 is a perspective view showing an appearance of a shim material for adjusting a valve lifter interval in which the lubricating device of the present invention is implemented.

FIG. 7 is a perspective view showing, in partial cross section, the appearance of a valve lifter in which the lubricating device of the present invention is implemented.

FIG. 8 is a partially sectional front view of a valve lifter using the shim material shown in FIG. 6;

FIG. 9 is a partial sectional front view of the valve lifter shown in FIG. 7;

[Explanation of symbols]

 T, H Two solids that perform relative motion TA Surface (surface treated film) P Minute depression S Lubricant (lubricating oil)

Claims (3)

[Claims] 1. A structure in which a large number of minute depressions are arranged and recessed in a contact surface of one or both of two solids performing relative motion, and a lubricant is supplied and filled into each of these depressions. A lubricating device characterized in that: 2. The lubricating apparatus according to claim 1, wherein a large number of minute recesses are formed in the contact surface of the solid and arranged in a pattern corresponding to the sliding direction of the solid. 3. A solid contact surface having a surface roughness of 0.03 Ra or less and having a diameter of at least 0.1 mm or less and a depth of at least 0.1 mm or less on this surface or a surface-treated film having been subjected to surface treatment. 2. The lubricating apparatus according to claim 1, wherein a number of minute recesses having a substantially semi-spherical cross section of at least 0.03 mm or less are arranged and recessed.