Axial force controllable surgical bone drill with stepped bit

Abstract

The invention relates to an axial force controllable surgical bone drill with a stepped bit. The axial force controllable surgical bone drill with the stepped bit is high in control precision and capable of effectively preventing injury to brain tissues, and comprises a drill body and the bit, a direct-current motor is arranged in a casing of the drill body and is connected with an intelligent integrated control system and a direct-current power supply, an output shaft of the direct-current motor is connected with a gear transmission device which is connected with a drill chuck through a transmission shaft, and the bit is mounted on the drill chuck. A thrust bearing is arranged at the joint of the drill chuck and the transmission shaft and clings to a deformation element, the deformation element is closely attached onto the casing and is positioned by an elastic element, a resistance strain gauge is adhered to the inner surface of the deformation element and is further connected with the intelligent integrated control system, and a sealing device is arranged between the drill chuck and the casing. A first portion of the bit is a guide portion, a twist drill serves as a bit body, a second portion of the bit is a transition portion, a third portion is a broaching portion, and diamond grains are arranged on spiral surfaces of the transition portion and the broaching portion.

Description

technical field [0001] The invention relates to a medical device, in particular to a surgical bone drill with a controllable axial force using a stepped drill bit. Background technique [0002] The instrument of surgical skull drilling is a hand-held electric drill at present, and the operation mode of the hand-held electric drill is: the electric drill is supported by the physician with bare hands to control the drilling direction and the feed rate. The electric drill is designed with a set of safety devices. The power source is connected to the drill bit through a clutch. When the drill bit is under pressure, the drill bit will be connected to the power source through the clutch to drive the drill bit to perform bone drilling operations; when the drill bit penetrates the skull, because no longer Bearing the reaction force of the skull can separate the drill bit from the power source, stopping the drill. However, these methods must rely on the doctor's personal rich clinic...

AI Technical Summary

Problems solved by technology

Obviously, the precision and accuracy of this measurement method cannot guarantee the requirements, because the base body of the bone drill motor is subjected to various signals and its complexity, and the accuracy and accuracy of signal acquisition and processing are difficult to be guaranteed. From the power point to the power source motor, the transmission chain is relatively long, and the accuracy and accuracy of the test cannot meet the requirements

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