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Connecting pin

A technology of connecting pins and pin holes, applied in the direction of bolts, etc., can solve problems such as the breakage of the donkey head and the beam, wear of connecting pins and pin holes, and achieve the effect of reducing wear

Active Publication Date: 2015-12-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0035] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or position shown in the drawings of the description, and are only for convenience The description of the application and the simplified description do not indicate or imply that the device or component referred to must have a specific orientation or position, or be constructed ...

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Abstract

The invention provides a connecting pin capable of being inserted into a pin hole. The connecting pin comprises a lengthwise-extending body and a lengthwise-extending column rod, a hole cavity extending in the lengthwise direction is formed in the body, and a first through hole allowing the hole cavity to be communicated with the outer space of the body is formed in the side wall of the body. The column rod can be inserted into the hole cavity and can rotate in the hole cavity, and the column rod is provided with a convex portion. When the column rod rotates in the hole cavity, the convex portion can be exposed out of the first through hole to abut against the inner wall of the pin hole. The hole cavity is formed in the body, the column rod with the convex portion is inserted into the hole cavity and rotates till the convex portion is exposed out of the first through hole to abut against the inner wall of the pin hole, and therefore the radial dimension of the body can be indirectly increased. A clearance between the body and the pin hole is tensioned to be reduced, therefore, the body and the pin hole can be gradually converted into interference fit from clearance fit, the connecting pin and the pin hole can be fastened, shaking of the connecting pin in the pin hole under the action of alternating loads is buffered, and abrasion to the connecting pin and the pin hole is reduced.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B19/02
Inventor 代新勇王慧聪邱衍辉李好婷胡畔朱文龙
Owner PETROCHINA CO LTD
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