Low-Speed Gear Module Bearing Layout for Braking and Torque
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Solution Overview
Problem
Existing low speed gear modules lack braking functionality and high torque capabilities, leading to uncontrollable movement of heavy objects due to gravity when the sun gear is stationary, as the planetary gear continues to rotate, causing objects to fall at high speeds.
Innovation Solution
The low speed gear module incorporates a first ball bearing between a driven gear and a through hole and a second ball bearing between a convex column and a concave hole, reducing offset spaces and enhancing torque by securely engaging planetary gears, thereby preventing rotation and maintaining control over heavy objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If planetary gears are used to transmit power from sun gear to inner gear, then power transmission is achieved, but the system lacks braking functionality and cannot prevent uncontrollable rotation when sun gear is stationary
Solution Approach 1:
A brake plate is introduced as an intermediary component between the planetary gears and the inner gear. The brake plate works with a brake mechanism to provide braking functionality, preventing uncontrollable rotation of the inner gear when the sun gear is stationary, without requiring fundamental changes to the planetary gear structure.
Solution Approach 2:
The brake mechanism applies preliminary counter-action to the planetary gears through the brake plate, creating resistance against unintended rotation before gravity can cause uncontrollable movement. This preliminary anti-action prevents the harmful effect of gravity-driven rotation when power transmission is not needed.
2Ease of manufacture
If gaps are maintained between driven gear and through hole, and between convex column and concave hole, then assembly is easier, but offset space increases causing shaking and reduced torque
Solution Approach 1:
The gaps between the driven gear and through hole, and between the convex column and concave hole, are reduced to specific parameter ranges. This parameter change decreases offset space and shaking, thereby improving torque capability while still allowing for practical assembly tolerances.
Solution Approach 2:
Different local regions of the gear module have different gap requirements. The driven gear region and convex column region are designed with specific local gap dimensions that optimize both assembly ease and torque transmission, rather than using uniform gaps throughout the structure.
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
The solution effectively brakes the gear module, preventing heavy objects from falling at high speeds and achieving high torque, ensuring stable operation and reduced shaking, thus addressing the torque and control issues in existing gear modules.
Implementation Method 1
a first ball bearing sheathing the driven gear and mounted between the driven gear and the through hole
Implementation Method 2
a second ball bearing sheathing the convex column and mounted between the convex column and the concave hole
Data Source
AI summary
A gear module includes a rotating cylinder, a first planetary gear set, a second planetary gear set, a concave-convex structure, and a limit bearing set. The first planetary gear set is accommodated in the rotating cylinder and includes a driven gear; the second planetary gear set includes a positioning frame, second planetary gears pivoted to a positioning frame, a driven gear engaged with the second planetary gears, and the positioning frame has a through hole; the concave-convex structure includes a convex column extended from the rotating cylinder and a concave hole formed on the positioning frame, the convex column is plugged into the concave hole; the limit bearing set includes a first ball bearing sheathing the driven gear and mounted between the driven gear and the through hole, and a second ball bearing sheathing the convex column and mounted between the convex column and the concave hole.