Handheld gas-driven medical equipment

Abstract

Provided is handheld gas-driven medical equipment. The equipment comprises a machine head, the machine head comprises a shell and a wind wheel rotationally arranged in the shell, a containing cavity is formed in the shell to contain the wind wheel, and a main gas port and an exhaust port which are communicated with the containing cavity are formed in the shell. A plurality of grooves are formed inthe inner wall face, surrounding the containing cavity, of the shell and distributed in the circumferential direction of the shell at intervals. The grooves reflect rotating airflow jetted to the grooves, the direction and speed of the airflow are changed, interference airflow is formed, the rotating speed of the machine head in the idling process can be effectively reduced, and torsion output ofthe machine head during tooth grinding can be effectively guaranteed. In addition, the equipment is simple in overall structure, easy to form and controllable in cost.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a hand-held gas-driven medical device. Background technique [0002] The turbine handpiece generates power by blowing compressed air to rotate the wind wheel, and is often used for grinding teeth and so on. Usually, the cutting speed of the head of the turbine handpiece is about 200,000 rpm, so as to ensure that the head can generate enough torque when grinding the teeth, so as to avoid the head being stuck or the speed is too low, which will affect the work efficiency. [0003] However, in order to ensure the cutting speed of the turbine handpiece, the no-load speed of the machine head is as high as 300,000 to 450,000 rpm, which greatly reduces the service life of the machine head bearings. For this reason, the industry uses high-quality high-speed bearings to withstand the high speed of the machine head to increase the service life of the bearings, but the high-speed b...

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Problems solved by technology

[0003] However, in order to ensure the cutting speed of the turbine handpiece, the no-load speed of the machine head is as high as 300,000 to 450,000 rpm, which greatly reduces the service life of the machine head bearings

For this reason, the industry uses high-quality high-speed bearings to withstand the high speed of the machine head to increase the service life of the bearings, but the high-speed bearings are expensive, which greatly increases the cost; The air hole pressure is limited to limit the flow rate of compressed air at the main air hole, so as to reduce the speed of the machine head and improve the service life of the bearing, but this will make the torque of the machine head insufficient and affect the doctor's work

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