a rotary actuator

Abstract

The invention discloses a rotary actuator, which belongs to the technical field of actuators. It mainly includes a box, a planetary mechanism, a driver and a transmission mechanism. The planetary mechanism includes a planetary carrier, a plurality of planetary wheels that rotate and fit on the planetary carrier, a ring gear that meshes with a plurality of planetary gears, and is coaxially arranged with the ring gear and connected to the The center wheel meshed with multiple planetary gears and the worm screw that is rotatably matched to the box body, the planet carrier is provided with an output shaft used to connect with the actuator, the ring gear is provided with a worm gear part meshed with the worm, the transmission mechanism and the driver It is connected with the center wheel so that the output torque of the transmission mechanism drives the center wheel to rotate when the driver is running, and the transmission mechanism is locked when the driver stops. The rotary actuator of the present invention can operate in the manual mode as usual in the case of power failure and has the function of anti-reverse.

Description

technical field [0001] The invention relates to the technical field of actuators, in particular to a rotary actuator. Background technique [0002] A rotary actuator is a drive device used to provide rotary motion. The existing Chinese patent No. CN201920375994.3 discloses a manual-automatic transmission mechanism, which uses a planetary mechanism to facilitate the switching between electric mode and manual mode, but the actuator using this technical solution relies on the self-locking of the motor. The circuit locks the sun gear to achieve normal operation in manual mode, or cooperates with the self-locking characteristics of the worm gear to prevent the executed end connected to the output interface, such as the valve, from reversing due to inertia, and cannot use the manual mode in the case of power failure and realize Anti-reversal of the output interface. [0003] Therefore, it is necessary to provide a new rotary actuator. Contents of the invention [0004] The te...

AI Technical Summary

Problems solved by technology

The existing Chinese patent No. CN201920375994.3 discloses a manual-automatic transmission mechanism, which uses a planetary mechanism to facilitate the switching between electric mode and manual mode, but the actuator using this technical solution relies on the self-locking of the motor. The circuit locks the sun gear to achieve normal operation in manual mode, or cooperates with the self-locking characteristics of the worm gear to prevent the executed end connected to the output interface, such as the valve, from reversing due to inertia, and cannot use the manual mode in the case of power failure and realize Anti-reversal of output interface

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