Detachable hinge pin connecting structure for pipe connecting

Abstract

The invention relates to a detachable hinge pin connecting structure for pipe connecting. The detachable hinge pin connecting structure comprises a pin, a male connector and a female connector which is matched with the male connector. The male connector and the female connector are provided with through holes into which the pin can be inserted. At least one contact surface exists in the part, making contact with the pin holes, of the pin. The detachable hinge pin connecting structure for pipe connecting can reduce contact stress.

Description

technical field [0001] The invention belongs to the mechanical field and relates to a mechanical link structure, in particular to a detachable pin-shaft connection structure used for pipe connection. Background technique [0002] Due to the advantages of simple structure, convenient operation and easy replacement, the pin connection is widely used in the fields of machinery, construction and hydraulic engineering. Commonly used pin connection structures such as figure 1 As shown, it consists of three parts: female joint, male joint, and round pin. The female and male joints are respectively welded to the steel pipe, and the two joints are connected by a round pin. [0003] When the currently used pin connection structure transmits large longitudinal loads, the following problems will occur: [0004] 1. In order to facilitate assembly and disassembly, the radius of the pin hole should be larger than the diameter of the round pin, which will cause line contact or even point ...

AI Technical Summary

Problems solved by technology

[0004] 1. In order to facilitate assembly and disassembly, the radius of the pin hole should be larger than the diameter of the round pin, which will cause line contact or even point contact between the pin and the pin hole (see figure 2 ), when the transmitted longitudinal load is large, a high contact stress will be generated in the contact area, and when the contact stress is large enough, adhesion or welding will occur at the contact point, and it will be sheared or Tearing, causing material to transfer or gradually peel off, causing adhesive wear and endangering the safety of mechanical structures

[0005] 2. The volume is too large

The flexural modulus of the round pin is small, so in order to meet the strength of the round pin, the diameter of the round pin is often required to be very large. Excessively large diameter of the round pin will greatly weaken the strength of the female and male joints. In order to meet the requirements of the connection strength, the size should be Need to take a lot, waste materials, uneconomical

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