Riser upper cover and manufacturing method thereof

A manufacturing method and standpipe technology, which are applied to steering mechanisms, bicycle accessories, engine components, etc., can solve the problems that the density and strength of the top cover of the standpipe cannot be further strengthened.

Active Publication Date: 2012-11-14
张世杰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for manufacturing the upper cover of the standpipe, so as to solve the problems in the prior art that there is waste material generation and the material density and strength of the upper cover of the standpipe cannot be further strengthened

Method used

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  • Riser upper cover and manufacturing method thereof
  • Riser upper cover and manufacturing method thereof
  • Riser upper cover and manufacturing method thereof

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Embodiment Construction

[0056] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0057] see Figure 2 to Figure 5 Shown, standpipe loam cake of the present invention comprises:

[0058] A cover body 10, the lower half of which is provided with a sleeve 11 with a smaller outer diameter, and an outwardly expanded ring shoulder 12 is formed on the top of the sleeve 11, and a screw head hole 16 is provided at the center; The sleeve column 11 can fit on the top edge of the vertical tube 50 beam hole, and the ring shoulder 12 can be pressed against the top of the vertical tube 50, and the upper half of the screw head hole 16 is in the shape of a cone that expands gradually in the radial direction of the hole, so that After the bolt 20 passes through the screw head hole 16, its screw head 21 can be aligned in the screw head hole 16 for positioning; and

[0059] A cylinder body 13 extends coaxially...

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PUM

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Abstract

The invention discloses an integrally molded riser upper cover. A lower half part of a cover body is provided with a sleeve with a smaller diameter; the top of the sleeve is provided with an expanded annular pressing shoulder, and a cylinder body extends downwards from the bottom surface of the sleeve, and is provided with a downward through counter bore; and a screw head hole coaxially communicated with the counter bore passes through the cover body, and a splitting groove is formed on the cylinder body so as to form a compression part. The manufacturing method comprises the following steps of: A, preparing metal bars in preset shapes and with preset weight; B, cold forging the counter hole in the center of the bottom surface of each bar; C, continuously cold forging to gradually mold the diameter and depth of the counter bore so as to form the downwards through cylinder body, and cold forging the compression part in turn on the cylinder body; D, shaping the counter bore and the compression part, forming a necking auxiliary hole concavely on the top of the counter bore, and molding the sleeve and the annular pressing shoulder; and E, cold forging the screw head hole which covers the auxiliary hole and coaxially passes through to the counter hole on the top of the cover body. The invention has the characteristics of high precision, mechanical properties and assembly strength, and low production cost.

Description

technical field [0001] The invention relates to the field of a standpipe top cover, and more specifically relates to a standpipe top cover that meets high precision requirements and can reduce production costs and improve assembly strength and a manufacturing method thereof. Background technique [0002] The bicycle vertical tube beam hole must be assembled on the front fork vertical tube through a vertical tube upper cover, such as figure 1 As shown, the traditional standpipe upper cover 91 must be used with the coupling element 93; the standpipe upper cover 91 has a sleeve column 91a that can be matched with the top edge of the standpipe bundle hole, and a ring shoulder 91b that can be pressed against the top of the standpipe , a screw head hole 91c that runs through up and down; as for the coupling element 93, it is arranged in the front fork standpipe, and it is formed by layered welding of a tightening piece 93b on the outer periphery of a nut 93a. The sheet 93b is in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/16B62K21/18
Inventor 张世杰张廷齐
Owner 张世杰
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