Eccentric shaft structure of medical reciprocating saw handpiece

Abstract

The invention discloses an eccentric shaft structure of a medical reciprocating saw handpiece. The eccentric shaft structure comprises an eccentric shaft main body, a bevel gear, a bearing, a left pressing block, a right pressing block and a locking screw. Compared with the prior art, the eccentric shaft structure of the medical reciprocating saw handpiece has the advantages that the working rotating speed of the handpiece can be increased, high-speed cutting is achieved, the operation efficiency is improved, heating and accessory abrasion can be reduced, the trouble that the handpiece needs to be frequently lubricated with oil can be eliminated, and the appearance size of the handpiece can be reduced to facilitate operation in a narrow space; and in addition, the left pressing block, theright pressing block and the screw can play a role of a flywheel after being assembled, vibration can be reduced, and the stability of tool reversing is improved, thereby facilitating the surgical safety.

Description

technical field [0001] The invention relates to a medical reciprocating saw handpiece, in particular to an eccentric shaft structure of the medical reciprocating saw handpiece. Background technique [0002] The medical reciprocating saw handpiece is a common tool for bone tissue cutting in surgical operations. The working speed and external dimensions of the medical reciprocating saw handpiece are important indicators for judging whether the handpiece can achieve high-speed cutting and can be operated flexibly in a small space one. [0003] At present, the transmission mechanism of the medical reciprocating saw mobile phone is usually driven by a bevel gear set, and the eccentric shaft fixed on one of the bevel gears is used to drive the connecting rod to realize the reciprocating cutting action of the cutter, such as Chinese patents CN201621421198.1 and CN201510434434.7 and CN201020248014. 2 As disclosed in the accompanying drawings, the diameter of the cylinder in the mid...

AI Technical Summary

Problems solved by technology

[0003] At present, the transmission mechanism of the medical reciprocating saw mobile phone is usually driven by a bevel gear set, and the eccentric shaft fixed on one of the bevel gears is used to drive the connecting rod to realize the reciprocating cutting action of the cutter, such as Chinese patents CN201621421198.1 and CN201510434434.7 and CN201020248014. 2 As disclosed in the accompanying drawings, the diameter of the cylinder in the middle of the eccentric shaft in this structure is too large. If a bearing is installed on the cylinder and then connected to the connecting rod hole, the dimensions of the associated bevel gear and the housing will be different. To increase the size of the shell will cause problems such as inconvenient operation of the medical reciprocating saw mobile phone in a small space

Therefore, the eccentric shaft of this structure is usually connected with the connecting rod through the sliding sleeve. The eccentric shaft and the sliding sleeve of this structure are easy to wear and generate heat, and the speed is not high, so it needs to be lubricated frequently.

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