Gear-rack mechanism, door pushing device, refrigerator and door

Abstract

The invention discloses a gear-rack mechanism, a door pushing device, a refrigerator and a door. The gear-rack mechanism comprises a floating return stroke device arranged at the end of a meshing tooth of a rack; when the floating return stroke device is in a first state, meshing between a gear and the rack is separated so as to achieve rack positioning; and when the floating return stroke deviceis in a second state, the upper end of the floating return stroke device at least partially abuts against the gear to push the gear to mesh with the rack again, and then the rack is driven to achievetransmission. According to the gear-rack mechanism, the floating return stroke device is arranged at the return stroke point of the rack stroke, therefore, the gear driven by a common motor also can be automatically separated from meshing with the rack at the return stroke point, rack transmission is stopped timely, the rack stops at the original position, and then accurate positioning is achieved. When the motor reversely rotates, the gear can be automatically separated from the positioning face and normally mesh with the rack to achieve transmission under the action of the floating return stroke device.

Description

technical field [0001] The invention relates to the field of transmission devices, in particular to a rack and pinion mechanism, a door pushing device, a refrigerator and a door. Background technique [0002] The rack and pinion transmission mechanism is widely used in mechanical transmission, which can convert the rotational motion of the motor into the linear motion of the rack. [0003] In the process of opening the refrigerator door or other doors, a push force needs to be applied to the door panel and the door frame to push the door open. Especially for the refrigerator door, the sealing strip arranged around the door frame generates negative pressure when the refrigerator door is closed, and the door opening device needs to provide enough thrust to drive the refrigerator door to separate from the door frame when the refrigerator door is opened. This push-out structure can be realized by a rack and pinion. In order to limit the range of movement of the rack and preven...

AI Technical Summary

Problems solved by technology

However, software control is prone to algorithm failure or abnormality, and software control usually needs to use stepper motors or servo motors to achieve, the use of stepper motors or servo motors will increase the cost of the rack and pinion transmission mechanism; The device requires additional installation space

If the volume of the floating return device needs to be compressed, an independently installed floating return device is required to withstand greater torque, and its material cost is relatively high

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