Mechanical Backstop With Floating Gear Reverse Locking
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Solution Overview
Problem
Current mechanical transmission devices in intelligent homes lack bidirectional braking capability, leading to instability and potential damage during reverse transmission due to inertia or weight, as existing clutches or brakes often fail to achieve smooth and quick braking.
Innovation Solution
A mechanical backstop comprising a housing, input impact gear, frictional plate, and floating impact gear, where the floating impact gear separates from the frictional plate during normal torque transmission but abuts against it for reverse locking, utilizing trapezoidal teeth and oblique surfaces for efficient engagement and disengagement, and an elastic piece for enhanced frictional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clutch or brake is used for braking in transmission devices, then one-way braking can be achieved, but bidirectional braking cannot be achieved and braking is not quick or smooth
Solution Approach 1:
The floating impact gear is designed to dynamically change its position based on the direction of torque transmission. During forward transmission, it separates from the frictional plate to allow smooth operation. During reverse transmission, it moves toward and contacts the frictional plate to enable bidirectional braking, thus achieving adaptability to different transmission directions while maintaining reliable braking performance.
Solution Approach 2:
The floating impact gear acts as an intermediary element between the input and output impact gears. It mediates the braking function by selectively engaging with the frictional plate based on transmission direction, enabling bidirectional braking capability that neither a simple clutch nor brake alone could achieve.
2Force
If a frictional plate is used for braking, then braking force can be generated, but the floating impact gear may not separate quickly enough during normal operation
Solution Approach 1:
The elastic piece is pre-compressed between the floating impact gear and the housing, storing elastic potential energy in advance. When the floating impact gear needs to separate from the frictional plate during normal operation, the elastic piece rapidly releases this stored energy, providing a quick separating force that overcomes friction and ensures fast separation without compromising braking force when engagement is needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables quick and smooth bidirectional braking, ensuring stable operation by allowing normal torque transmission while effectively locking in reverse, thus preventing damage from reverse transmission.
Implementation Method 1
the floating impact gear floats toward the output impact gear to separate from the frictional plate
Implementation Method 2
the floating impact gear floats toward the input impact gear to abut against the frictional plate and achieve reverse locking
Implementation Method 3
the floating impact gear abuts against the frictional plate and thus the floating impact gear is reversely locked due to a frictional resistance of the frictional plate
Implementation Method 4
due to engagement transmission of the first convex teeth and the second convex teeth and oblique surface cooperation of the first oblique surfaces and the second oblique surfaces
Data Source
AI summary
A mechanical backstop is provided which comprises a housing, an input impact gear, a frictional plate, a floating impact gear, and an output impact gear. The floating impact gear is movably mounted between the input impact gear and the output impact gear to achieve transmission. The frictional plate is fixed relative to the housing and disposed at a side of the floating impact gear close to the input impact gear. When the input impact gear transmits a torque to the floating impact gear, the floating impact gear floats toward the output impact gear to separate from the frictional plate and transmit the torque to the output impact gear. When the floating impact gear transmits a torque reversely, the floating impact gear floats toward the input impact gear to abut against the frictional plate and achieve reverse locking.