Axial-force-controllable surgical bone drill using brazed PCBN (Polycrystalline Cubic Boron Nitride) superhard material drill bit

Abstract

The invention relates to an axial-force-controllable surgical bone drill using a brazed PCBN (Polycrystalline Cubic Boron Nitride) superhard material drill bit. The axial-force-controllable surgical bone drill has the advantages that the control accuracy is high and damages to brain tissues can be effectively avoided. A direct-current motor is arranged in the case of a drill body. The direct-current motor is connected with an intelligent integrated control system and a direct-current power supply. The output shaft of the direct-current motor is connected with a gear transmission device. The gear transmission device is connected with a drill bit chuck through a transmission shaft. A drill bit is installed on the drill bit chuck. A thrust bearing is arranged at the junction of the drill bit chuck and the transmission shaft. The thrust bearing is in close contact with a deformable element. The deformable element is in close contact with the case. The deformable element is positioned by using an elastic element. A resistance strain gage is bonded on the internal surface of the deformable element. The resistance strain gage is additionally connected with the intelligent integrated control system. A sealing device is arranged between the drill bit chuck and the case. The drill bit comprises a cylindrical basal body. A twist drill tip is arranged on the cylindrical basal body. A spiral groove is additionally arranged on the cylindrical basal body. PCBN superhard materials are arranged in the spiral groove and on the surface of the main rear blade of the drill bit.

Description

technical field [0001] The invention relates to a medical device, in particular to a surgical bone drill adopting a brazed PCBN superhard material drill bit with controllable axial force. 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 docto...

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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