Vertical hoisting tool of piston pin

Abstract

The invention discloses a vertical hoisting tool of a piston pin. The vertical hoisting tool comprises a collar bolt, an adjusting bolt, an elastic expansion sleeve, a conical ejection block and a conical ejection block anti-rotating mechanism, wherein a hoisting bolt is fixed on the upper end of the adjusting bolt, the adjusting bolt penetrates through the elastic expansion sleeve, the lower end of the adjusting bolt is in threaded connection with the upper end of the conical ejection block; and a plurality of axial elastic grooves are uniformly distributed at the lower part of the elastic expansion sleeve, the upper end and the lower end of the elastic expansion sleeve respectively extend in the radial direction to form an upper guide section and a lower expansion section, an inner conical hole in the lower end of the lower expansion section is matched with an outer conical surface of the middle part of the conical ejection block, and the conical ejection block anti-rotating mechanism is arranged on the lower end of the elastic expansion sleeve. The vertical hoisting tool is light and compact in structure, low in manufacturing cost and safe and convenient to use, and the piston pin can be rapidly clamped, hoisted or unloaded only by one person. The machining auxiliary cost of the piston pin is reduced, the working efficiency is improved by three times, and the entire operation process is labor-saving, safe and reliable.

Description

technical field [0001] The invention relates to a lifting tool for internal combustion engine parts, in particular to a lifting tool for transferring piston pins in each cutting process, and belongs to the technical field of lifting tools. Background technique [0002] The piston pin is used to connect the piston and connecting rod of the internal combustion engine, and transmits the force of the explosive gas borne by the piston to the connecting rod. It is an important part of the internal combustion engine to transmit power. The piston pin is a cylindrical structure with a through hole in the center. After the outer circle is ultra-fine ground, the piston pin needs to be hoisted to the surface grinder, and the upper and lower end faces are finely ground after being clamped with a combination fixture based on the outer circle. . Due to the large load of the piston pin and the complex stress state, in order to avoid stress concentration, there is no threaded hole on the en...

AI Technical Summary

Problems solved by technology

During this process, accidents often occur that the piston pin slips off, crushes the fingers of employees, or bruises the surface of the piston pin, or smashes the combination fixture.

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