JPS63281734A - Device for manufacturing hydrodynamical grooved bearing - Google Patents

Abstract

PURPOSE:To manufacture a hydrodynamical grooved bearing simply and at low cost by arranging a hard ball by holding it freely rollingly by a calking means in the holding hole of the outer diameter part of a guide pin arranged at the inner diameter part of a bearing bush. CONSTITUTION:A hard guide pin 10 is concentrically arranged at the inner diameter part of a bearing bush 2. The holding hole 10a of a semi-circular bottom part is arranged at plural places against the circumferential direction at the outer diameter part of this guide pin 10. The hard ball 4 in the diameter equal to or slightly smaller than the bore diameter is respectively inputted to these holding holes 10a. Moreover said ball 4 is held freely rollingly by the calking part 10b of the holding hole 10a. The axial direction feeding in arrow marks V, W directions relatively to said bearing bush 2 and a rotary movement are given to this guide pin 10. A fluidic groove 2a is thus formed at the inner diameter part of the bearing bush 2 to obtain a hydrodynamical grooved bearing.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention has a shaft and a bearing bush, and has at least one pattern of lubricant pumping on at least one of the corresponding surfaces of both. The present invention relates to an apparatus for manufacturing a hydrodynamic grooved bearing in which a shallow groove is formed for functioning.

[Conventional technology]

Japanese Patent Application No. 62-57168 is a prior art of this type. This conventional grooved bearing manufacturing apparatus is shown in FIG. In the figure, reference numeral 2 denotes a bearing bush to be machined, which is fixed to a fixing jig (not shown). Reference numeral 6 denotes a hard guide pin that is rotatably supported by support means (not shown) concentrically with the bearing bush 2 . This guide pin 6 is provided with an arc-shaped annular groove 6a having an arcuate surface with a radius equal to or slightly larger than the radius of the hard ball 4. A cage 5 is interposed between the bearing bush 2 and the guide pin 6 and is rotatably supported concentrically by support means (not shown). A plurality of guide holes 5a are arranged in the cage 5 in a radial direction symmetrically with respect to the axial center, and the balls 4 are fitted in the cage 5 so as to be freely movable.

In the above-mentioned conventional manufacturing apparatus, the guide pin 6 is given a rotational speed Wp f, the cage 5 is given a rotational speed Wk, and both are given a feed rate yv, and each rolling ball 4 causes the bearing bush 2 to be Fluid #l 2 & is formed on the inner diameter part by plastic working.

[Problem that the invention seeks to solve]

In the conventional hydrodynamic grooved bearing manufacturing apparatus as described above, the cage 5 is required to hold the ball 4 in the annular groove 7 of the guide pin 6, making the mechanism complicated and the equipment cost correspondingly high. The problem of becoming one was rare.

The present invention has been made to solve these problems, and aims to provide a hydrodynamic grooved bearing manufacturing apparatus that has a simplified mechanism and reduced equipment costs.

[Means for solving problems]

The apparatus for manufacturing a hydrodynamic grooved bearing according to the present invention includes holding holes with semicircular bottoms arranged at a plurality of locations in the circumferential direction on the outer diameter part of the guide pin or the inner diameter part of the guide sleeve, and these holding holes A ball is placed in each, and the ball is held in place by a caulking K so that it can roll freely, and the cage is omitted.

[Effect]

In this invention, the ball is placed in a holding hole in the semicircular bottom of the guide pin or guide sleeve, and is held by caulking so as to be freely rotatable, and while the guide pin or guide sleeve is relatively rotated, the ball is A fluid groove is formed in the bearing bush or shaft in a spiral shape.

〔Example〕

FIG. 1 shows an embodiment of a fluid grooved bearing manufacturing apparatus according to the present invention. In the figure, reference numeral 2 denotes a bearing bush to be machined, which is fixed to a fixing jig (not shown) K. IO is a hard guide pin that is rotatably supported by support means (not shown) concentrically with the bearing bush 2. On the outer diameter of the guide pin 10, holding holes 10a with semicircular bottoms are arranged at multiple locations (two locations in the figure) at equal intervals in the circumferential direction, and hard balls 4 are inserted into the holding holes 10a. Each of them is held in a crimped trap so that they can be transferred freely. Yu ob is the caulking part.

The retaining hole 10a at the semicircular bottom has a diameter equal to or slightly larger than the diameter of the ball 4.

The guide pin loi holding the ball number is shown in the JdZ diagram. The ball 4 fitted in the holding hole 10a is attached to the caulking part 10
b, and is held rotatably in the circumferential direction and radial direction.

In the manufacturing apparatus configured as described above, the guide pin 1 is moved to 'gA!' with respect to the bearing bush 2. Il] By rotating at a rotational speed W by a means (not shown) and feeding in the axial direction at a feed rate V, fluid grooves 2a are plastically worked into a spiral shape in the inner diameter part of the bearing bushing 2 by the transferring balls 4. is formed.

Figure 83 shows another embodiment of the invention. Reference numeral 1 denotes a shaft used in the processing field, which is fixed by a fixing jig (not shown).

Reference numeral 12 denotes a hard guide sleeve that is rotatably supported concentrically with the shaft 1 by support means (not shown). This guide sleeve 12 has semicircular bottom holding holes 12a arranged at multiple locations (two locations in the figure) at equal intervals in the circumferential direction, into which hard balls 4 are inserted, and each is crimped by υ. The holding hole 12b, which is held so as to be able to roll freely, is a caulked portion.The holding hole 12a has a hole diameter that is equal to or slightly larger than the diameter of the ball 4.

The guide sleeve 12 holding the ball number is shown in FIG. The ball 4 fitted in the holding hole 12a is attached to the caulking part 1
2b, it is rotatably held in the circumferential direction and the radial direction.

In the above device, by rotating the guide sleeve 12 with respect to the shaft 1 at a rotational speed W by a driving means (not shown) and feeding it in the axial direction at a feed speed KV, each rolling ball 4 is rotated. A helical shape is formed on the outer circumference of the shaft 1 using fluid $la by plastic working.

Note that by rotating the guide bottle 10 or the guide sleeve 12 a predetermined distance in the axial direction by rotating in one direction and then rotating it in the opposite direction, herringbone-type fluid grooves with different helical directions are formed.

In addition, by providing a plurality of sets of retaining holes arranged in multiple stages in the circumferential direction in the guide bin 10 or the guide sleeve part 2 in the axial direction, and making the depths the same or different, the depth can be increased. Fluid grooves with the same or different values are simultaneously formed at a plurality of locations.

Furthermore, by changing the diameters of the mutually holding balls provided at multiple locations in the axial direction of the guide bottle or guide sleeve, fluid grooves with different depths can be simultaneously formed at multiple locations.

Furthermore, in the above embodiment, each holding hole in the circumferential direction has the same hole depth, but the depth may be changed, or the ball diameter may be changed. The depth of the fluid grooves in each strip is different.

Furthermore, in the above embodiment, the bearing bush 2 or the shaft 1 is fixed and the guide bin 10 or the guide sleeve 12 is fed while being rotated, but the guide bin 10 or the guide sleeve 12 is fixed and the bearing bush 2 or the shaft 1 is It may also be sent while rotating.

Furthermore, in the above embodiment, each ball 4 is inserted into the holding hole 10a of the guide bottle 10 or the holding hole 10a of the guide pushbutton 2.
Although a is provided at equal intervals in the circumferential direction, it may be provided at unequal intervals. In this case, the intervals between the fluid grooves formed by each ball 4 are unequal.

[Effects of the Invention] As described above, according to the present invention, holding holes with semicircular bottoms are provided at a plurality of locations in the circumferential direction in the outer diameter portion of the guide bin or the inner diameter portion of the guide sleeve, and Since the balls are inserted and supported so as to be able to roll freely by the caulking means, the conventionally necessary cage can be omitted, the mechanism is simple, the operation is easy, and the equipment cost is reduced.

[Brief explanation of drawings]

Fig. g1 is a tIfT plane view showing an embodiment of the hydrodynamic grooved receiver manufacturing device according to the present invention, Fig. 2 is a perspective view of the guide bin portion of Fig. 1, and Fig. 3 is a diagram showing another embodiment of the hydrodynamic grooved receiver manufacturing apparatus according to the present invention. FIG. 4 is a cross-sectional perspective view of a half of the guide sleeve portion of FIG. 3, and FIG. 5 is a cross-sectional view showing a conventional hydrodynamic grooved bearing manufacturing apparatus according to an embodiment. FIG. 1... Shaft, Yua... Fluid groove, 2... Bearing bush,
2a...Fluid groove, 4...Ball, 10...Guide bottle, Yu Oa...Holding hole at the semicircular bottom, lob...
Caulked portion, 12...Guide sleeve, U2a...Holding hole at semicircular bottom, 12b...Caulked portion.

Claims (6)

[Claims] (1) A manufacturing device for a hydrodynamic grooved bearing in which at least one pattern of shallow fluid grooves for pumping lubricant is formed on at least one of the corresponding surfaces of the shaft and the bearing bushing. A hard guide pin is arranged concentrically on the inner diameter of the bearing bush, or a hard guide sleeve is arranged concentrically on the outer diameter of the shaft, and the outer diameter of the guide pin is arranged concentrically on the outer diameter of the shaft. Alternatively, in the inner diameter part of the guide sleeve, holding holes with semicircular bottoms are arranged at multiple locations in the circumferential direction, and these holding holes are filled with hard holes with a diameter equal to or slightly smaller than the hole diameter. Balls are inserted into each ball and are held rotatably by caulking means, and the guide pin is attached to the bearing bush.
Alternatively, an apparatus for manufacturing a hydrodynamic grooved bearing, characterized in that the device comprises means for imparting rotational movement and axial direction feed to the guide sleeve relative to the shaft. (2) A driving means is provided to reverse the direction of relative rotational motion between the guide pin and the bearing bush, or the guide sleeve and the shaft after a predetermined feed in the axial direction, so that the fluid groove is formed in a herringbone shape. An apparatus for manufacturing a hydrodynamic grooved bearing according to claim 1. (3) Claims 1 or 2, characterized in that the guide pin or the guide sleeve is provided with holding hole groups at a plurality of locations in the axial direction, and the mutual groove depths are the same or different. An apparatus for manufacturing a hydrodynamic grooved bearing as described in . (4) The guide pin or the guide sleeve is provided with a plurality of holding hole groups in the axial direction, and the diameters of the balls are the same or different.
3. A manufacturing apparatus for a hydrodynamic grooved bearing according to item 1 or 2. (5) A hydrodynamic grooved bearing according to claim 1 or 2, characterized in that the depth of each holding hole in the circumferential direction of the guide pin or the guide sleeve is varied. manufacturing equipment. (6) Hydrodynamic grooves according to claim 1 or 2, characterized in that the diameters of the balls in each holding hole in the circumferential direction of the guide pin or guide sleeve are changed from one another. Bearing manufacturing equipment.