Gear clutch mechanism and radiotherapy equipment including it

Abstract

The invention provides a gear clutch mechanism and radiotherapy equipment including the same. The gear clutch mechanism is mounted at a base and comprises a driven gear, a guiding component, a mounting plate, a driving gear and a pushing assembly, wherein the driven gear is rotatably fixed to the base; the guiding component is fixed on the base; the mounting plate is supported by the guiding component in a sliding manner; the driving gear is rotatably fixed to the mounting plate; the pushing assembly is used for pushing the mounting plate to slide along the guiding component, and when the pushing assembly pushes the mounting plate to slide close to the driven gear, the driving gear moves close to the driven gear until being mutually meshed with the driven gear; and when the pushing assembly pushes the mounting plate to slide away from the driven gear, the driving gear moves far from the driven gear until being mutually separated from the driven gear. The gear clutch mechanism adopts a special cam structure, so that the clutching of the gear in the radial direction can be conveniently realized. By adjusting the profile of the cam, a relatively large dead angle can be formed, and a good locking function can be realized.

Description

technical field [0001] The invention mainly relates to the field of medical devices, in particular to a gear clutch mechanism and radiotherapy equipment including the same. Background technique [0002] Radiation therapy is currently an important means of treating malignant tumors, usually using a medical linear accelerator. figure 1 is a schematic diagram of an existing medical linear accelerator, such as figure 1 As shown, a conventional medical linear accelerator 100 is mainly composed of a frame 110 and a treatment head 120 (radiation head). In the medical linear accelerator 100 , in order to better simulate the shape of the tumor, the treatment head 120 usually rotates around the Z-axis of the medical linear accelerator 100 . [0003] Due to the high precision and high safety requirements of the medical linear accelerator, the treatment head will be in a self-locking state. Given that therapy heads are high failure systems, they require frequent maintenance and repai...

AI Technical Summary

Problems solved by technology

The disadvantage is that the two pinions 310, 320 have different distances from the lever rotation point 330, so that the two pinions 310, 320 move different distances during the meshing process, resulting in the center of the two pinions 310, 320 The pitch cannot be guaranteed to be uniform, which causes the transmission accuracy of the two pinion gears 310, 320 to be different

[0006] It can be seen that the manual input method and the radial clutch used in the prior art have their own defects, and cannot meet the increasingly stringent requirements for the treatment head in radiotherapy equipment.

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