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Method for making a cylindrical bearing member, and groove forming mold core pin

A cylindrical, grooved technology applied in the direction of bearing elements, bearings, shafts and bearings, which can solve the problems of unfavorable cost and unsuitable for mass production

Active Publication Date: 2009-08-19
TSUBAKIMOTO CHAIN CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the prior art has problems of being unsuitable for mass production and disadvantageous in cost

Method used

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  • Method for making a cylindrical bearing member, and groove forming mold core pin
  • Method for making a cylindrical bearing member, and groove forming mold core pin
  • Method for making a cylindrical bearing member, and groove forming mold core pin

Examples

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Embodiment Construction

[0037] The following will refer to Figure 1 to 1 5 Describes the first embodiment of the present invention.

[0038] First, in the cylindrical bearing element 100 involved in the present invention, such as figure 1 As shown in , a plurality of closed grooves 112 serving as oil reservoirs are formed on an inner peripheral surface 111 of a seamless cylindrical member 110 by groove forming a core pin. Each of these blocking grooves 112 serving as an oil reservoir has a groove shape in which a longitudinal proximal end portion 112 a and a terminal portion 112 b of the blocking groove 112 are sealed. The sealing of said proximal portion 112a is performed by a restored and straightened portion 113 obtained by restoring and straightening the tapered inner circumferential surface portion of the cylindrical element into a cylindrical shape.

[0039] Therefore, when the cylindrical bearing member 100 in which the shaft, pin, etc. , wherein the blocking grooves 112 face each other. ...

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PUM

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Abstract

The present invention provides a method and groove forming core pin for manufacturing a cylindrical bearing element. The cylindrical bearing element can hold lubricating oil in the occlusion groove used as an oil reservoir for a long time to fully exhibit the lubricating function, and the occlusion can be efficiently mass-produced on the inside of the cylindrical element at low cost groove. The cylindrical bearing element has an inner peripheral surface with a plurality of closed grooves and is made of a cylindrical raw material or blank as a hollow open cylindrical element. The blank includes a tapered inner circumferential surface at its open end. A groove-forming core pin including a groove-forming protrusion is pushed from the open end toward the bottom so as to obtain a cylindrical member in which a plurality of grooves are formed on the inner surface. said groove-forming core pin is removed, after which the tapered inner peripheral surface of the cylindrical element is restored and straightened into a cylindrical shape so as to close said groove at the open end of said element, after which Remove the base from the cylindrical element.

Description

technical field [0001] The present invention relates to a cylindrical bearing element suitable for use as a bushing fitted and inserted in a rotatable manner relative to a connecting pin of a chain, and more particularly to a cylindrical bearing element in which A plurality of closed grooves for storing lubricating oil are formed on its inner surface. Background technique [0002] Cylindrical bearing elements have been used as sliding bearings, such as bearing bodies for rotating shafts or bushings for chains, by inserting shafts, pins, etc. into tubular elements. [0003] In the cylindrical bearing element, a plurality of bottomed or blind grooves have been formed which serve as oil reservoirs for lubricating oil. The grooves are parallel to the axial direction on the inner circumferential surface of the cylindrical bearing element in order to improve the lubrication between the inner circumferential surface of the bearing surface and the shaft, pin or the like. [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/10F16G13/06F16C33/14A61C13/28B21C1/26B21D31/04B21D53/00B21J5/10B21J5/12B21K1/08B21K21/12B23P13/02F16G13/02F16H57/04
CPCY10T29/49673Y10T29/49702B21K21/12B21J5/12F16H57/04B21K1/08Y10T29/49639Y10T29/49668B21J5/10Y10T29/49636F16C33/14F16C2220/48B21D31/04
Inventor 三木博文
Owner TSUBAKIMOTO CHAIN CO