Surgical, torque transfer instruments including associated tools

Abstract

The present disclosure relates to a surgical torque transfer instrument comprising a handpiece to which a handpiece shaft is or can be flanged; providing a tool mount in said handpiece or in said handpiece shaft, For selectively receiving a surgical tool rotatably supported or rotatably supported in the handpiece shaft for axially securing the tool in the in the tool mount and for transferring torque to the tool. According to the invention, said tool mount comprises in particular the following parts: - a sleeve-shaped lead shaft comprising a proximal plug-in zone for a torsion bar, and a distal torque-transmitting and axial shaft for said tool a locking zone, and - a closing sleeve displaceably and preferably rotatably surrounding said guide shaft, said closing sleeve comprising: a distal stop section acting on all sides of said guide shaft the axial locking zone for axially locking and releasing the tool; and a proximal stop section acting on the male zone of the lead shaft for stopping the tool mount on the torsion bar to transfer torque and axial force and to release the tool mount from the torsion bar.

Description

technical field [0001] The present invention relates to a surgical instrument for providing torque and a driven tool which is rotatably supported in an instrument handpiece or in a handpiece shaft connected to the instrument handpiece and which transmits the torque as high as possible to all Describe the driven tool. Background technique [0002] In advanced (minimally invasive) surgery, various instruments are used for fragment removal or material removal machining of e.g. Machining, the instrument includes an ergonomically shaped handpiece and optional replaceable tools (such as milling cutters, rotary knives, polishing heads, etc.) rotatably supported in the handpiece at a distance end so that it can be driven. Depending on the intended use and expected rotational speed, the tool drive is a hydraulic, pneumatic or electric drive that communicates with the The tools are operatively connected. The drive means can be integrated into the handpiece or realized as an extern...

AI Technical Summary

Problems solved by technology

[0016] The described cross-pin connection results in a localized weakening of the torque-transmitting bolts within the handpiece as well as the material in the housing tube and the rotating shaft

Also, the cross pins are very thin and thus easily broken

Overall, transferable torque is limited

[0017] Also, the wedge shape of the tool shaft is not very suitable for transferring high torques because the amount of axial force causes the wedge shape on the side of the tool to disengage from the notch of the torque transfer bolt

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