Expansion shaft

A technology of expansion shaft and coaxial line, which is applied in the field of expansion shaft, can solve the problems of inconvenient use and difficult maintenance of expansion shaft, and achieve the effect of easy disassembly and maintenance, not easy to break down, and easy maintenance

Inactive Publication Date: 2014-03-19
TIANJIN JINWANFANG STEEL STRUCTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an expansion shaft with simple structure, convenient use, easy maintenance and detection, and low cost in order

Method used

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  • Expansion shaft

Examples

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Embodiment Construction

[0011] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0012] see figure 1 , an expansion shaft, comprising a cylindrical expansion shaft main body 1, the main body 1 has a hole 2 coaxial with the main body 1, and the hole 2 is provided with a top coaxial with the hole Rod 3, one end of the ejector rod 3 is inserted on the main body 1, and the other end of the ejector rod 3 is connected to the end of the main body 1 through threads. In this embodiment, one end of the main body 1 is provided with a The other end of the main body 1 has an internal thread connecting the end of the ejector rod 3, one end of the ejector rod 3 is inserted into the small hole, and the other end of the ejector rod 3 has a The top of one end where the push rod 3 and the main body 1 are threadedly fitted has a part that f...

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Abstract

The invention relates to an expansion shaft which comprises a cylindrical main body of the expansion shaft. The expansion shaft is characterized in that a hole in the same coaxial line of the main body is formed in the main body, an ejector rod in the same coaxial line of the hole is arranged in the hole, one end of the ejector rod is inserted into the main body, the other end of the ejector rod is connected with the end of the main body through threads, the ejector rod is provided with tapered ejection blocks, at least two radial through holes are arranged in positions, corresponding to the tapered ejection blocks, of the main body, an expansion rod is inserted into the radial through holes, and the lower end of the expansion rod presses the tapered ejection blocks in an abutted mode. The expansion shaft has the advantages of being simple in structure, convenient to use, easy to maintain and detect and low in cost.

Description

technical field [0001] The invention belongs to the technical field of mechanical components, in particular to an expansion shaft. Background technique [0002] The expansion shaft can be used to fix the sleeves of different sizes, so as to fix the cylindrical workpieces of different sizes. In the prior art, the most common expansion shaft is an inflatable expansion shaft. This expansion shaft includes a cylindrical shaft body. The inside of the shaft body has an inflatable air bag, which is inflated by the inflation device, and the inflated air bag pushes the expansion block out of the slot hole, so as to clamp the shaft sleeve or sleeve workpiece of different sizes. [0003] This expansion shaft has the following disadvantages in the process of use: 1. Inconvenient use: this expansion shaft must be used in conjunction with an inflatable device, which is highly dependent and cannot be used anytime and anywhere. 2. Inconvenient maintenance: the expansion shaft has a compac...

Claims

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Application Information

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IPC IPC(8): B23B31/40
CPCB23B31/40
Inventor 张振海
Owner TIANJIN JINWANFANG STEEL STRUCTURE
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