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Special-shaped steel pipe

A technology for special-shaped steel pipes and steel pipes, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of reduced service life of steel pipes, unfavorable lubricating oil retention, etc., and achieve the effect of increasing service life

Inactive Publication Date: 2014-02-26
JIANGSU HONGBAO GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hole wall of the steel pipe in traditional use is usually a curved surface, which is not conducive to the retention of lubricating oil, which reduces the service life of the steel pipe

Method used

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  • Special-shaped steel pipe

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Embodiment Construction

[0018] refer to figure 1 A special-shaped steel pipe shown includes a steel pipe 1 , a hole 2 arranged in the middle of the steel pipe 1 , and a special-shaped surface 3 arranged on the wall of the hole 2 .

[0019] Wherein, the steel pipe 1 is circular in shape.

[0020] Both the top surface and the bottom surface of the steel pipe 1 are plane.

[0021] The hole 2 is a through hole.

[0022] The concentricity deviation between the steel pipe 1 and the hole 2 is not greater than 0.1 cm.

[0023] The profiled surface 3 includes a curved surface 4 and a straight surface 5 .

[0024] There are two curved surfaces 4, which are distributed symmetrically about the axis of the steel pipe 1 respectively.

[0025] There are more than two straight faces 5, which are distributed symmetrically about the axis of the steel pipe 1 respectively.

[0026] A first rounded corner (not shown) is provided at the connection between the curved surface 4 and the straight surface 5 , and a second...

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Abstract

The invention discloses a special-shaped steel pipe which comprises a steel pipe body, a hole formed in the middle of the steel pipe body and a special-shaped face arranged on a hole wall. By the special-shaped steel pipe, convenience can be brought to enabling lubricating oil to stay on the hole wall, and service life of the special-shaped steel pipe is effectively prolonged.

Description

technical field [0001] The invention relates to a special-shaped steel pipe. Background technique [0002] The hole wall of the steel pipe in traditional use is usually a curved surface, which is not conducive to the retention of lubricating oil, which reduces the service life of the steel pipe. (The actual usage is as follows: it is used for the shell of the electric tool motor. Traditionally, the special-shaped inner surface is obtained by gold processing, and the inner surface of the special-shaped steel pipe can be used directly without processing, which improves the utilization rate of materials and reduces Cost of production) Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a special-shaped steel pipe that is convenient for lubricating oil to stay and effectively increases the service life. [0004] In order to solve the above problems, the present invention adopts the following technical solutions: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/02H02K5/04
CPCF16S3/00F16N1/00H02K5/04
Inventor 王忠华朱剑峰朱华峰
Owner JIANGSU HONGBAO GROUP CO LTD