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US 8,075,439 B2Granted
Automatic opening-closing device
AssigneeJohnson Electric S.A.
InventorsJingning Ta, Zhiqiang Wu, Jicheng Pan
Life of this patent
Estimating the term…
Abstract
An automatic opening-closing device, especially for a cover or seat of a toilet, has a motor having a motor shaft, a speed reducer connected to the motor shaft, a planetary gearbox driven by the speed reducer, an output axle for driving the cover between an open position and a closed position. A protection device limits the torque between the output axle and an output shaft of the planetary gearbox.
Claims21
An automatic opening-closing device comprising:
- a motor having a shaft, a speed reducer connected to the shaft, a planetary gearbox having a sun gear driven by the speed reducer, and an output axle, and a protection device comprising a driven ring and a driving ring;
- wherein one end of the output axle is secured to the driven ring and an output shaft of the planetary gearbox is secured to the driving ring, whereby the output shaft drives the output axle to rotate between a first position and a second position via the protection device;
- wherein the protection device is a friction clutch, the driving ring and the driven ring comprising an inner ring and an outer ring, the outer ring having a wall at one axial end and the inner ring being disposed within the outer ring, the friction clutch having at least one spring disc disposed within the outer ring and sandwiched between an axial end face of the wall of the outer ring and an axial end face of the inner ring, and a circlip holding the inner ring inside the outer ring against the urgings of the spring disc;
- such that the inner ring and outer ring rotate together unless acted upon by a force greater than a predetermined maximum.
1 more element
An automatic opening-closing device comprising:
- a motor having a shaft;
- a speed reducer connected to the shaft;
- a planetary gearbox having a sun gear driven by the speed reducer, and an output shaft;
- an output axle;
- a protection device connected between the output shaft and the output axle whereby the output axle is driven by the output shaft via the protection device, the protection device comprising:
- a driving ring to which the output shaft is secured, the driving ring being one of an outer ring and an inner ring disposed inside the outer ring;
- a driven ring to which the output axle is secured, the driven ring being the other of the outer ring and the inner ring, the outer ring comprising an end wall with an axial end face facing an axial end face of the inner ring;
- at least one spring disc disposed inside the outer ring and sandwiched between the axial end face of the inner ring and the axial end face of the end wall of the outer ring;
- and
- a circlip disposed inside the outer ring, wherein the circlip holds the inner ring inside the outer ring against the urgings of the spring disc, such that the inner ring and outer ring rotate together unless acted upon by a force greater than a predetermined maximum.
7 more elements
Dependencies are inferred from the claim text.