connecting pin

Abstract

The connecting pin provided by the application can be inserted into the pin hole, and it includes: a body extending longitudinally, the body is provided with a cavity extending along the longitudinal direction, and the side wall of the body is provided with a second channel connecting the cavity and the outer space of the body A through hole; a vertically extending pole, the pole can be inserted into the cavity and rotate in the cavity, the pole has a protruding part; when the pole rotates in the cavity, the protruding part can be formed by the first A through hole exposes the inner wall of the contact pin hole. By opening a cavity on the body, inserting a pole with a protruding part into the cavity, and rotating until the protruding part exposes the first through hole and contacts the inner wall of the pin hole, the radial dimension of the body can be indirectly increased , by tightening the gap between the body and the pin hole, the gap can be reduced, so that the body and the pin hole can gradually change from a clearance fit to an interference fit, and the fastening of the connecting pin and the pin hole can be realized, and the alternating load can be slowed down. Under the action of the connecting pin, the connecting pin moves in the pin hole, reducing the wear of the connecting pin and the pin hole.

Description

technical field [0001] The present application belongs to the technical field of device connection, and in particular relates to a connection pin. Background technique [0002] In mechanical oil recovery, the beam and the donkey head of the pumping unit are usually connected by connecting pins, so that the donkey head is suspended on the beam. Specifically, a pin hole may be provided at the connection between the beam and the donkey head, and the connecting pin may be movably inserted in the pin hole to realize the detachable connection between the beam and the donkey head. [0003] Usually, in order to facilitate the insertion of the connecting pin, there is a clearance fit between the connecting pin and the pin hole. When pumping oil, the beam drives the donkey head to move up and down, and the connecting pin and pin hole are subjected to alternating loads, which makes the connecting pin move in the pin hole, resulting in wear of the connecting pin and pin hole. When the...

AI Technical Summary

Problems solved by technology

When pumping oil, the beam drives the donkey head to move up and down, and the connecting pin and pin hole are subjected to alternating loads, causing the connecting pin to move in the pin hole, resulting in wear of the connecting pin and pin hole

When the wear reaches a certain level, the strength of the connecting pin and the pin hole decreases, which may cause the donkey head to break off from the beam and cause a construction accident.

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