Planetary Gear Reducer Vibration Damping via Buffer Mediator
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Solution Overview
Problem
Vibration during operation of speed-reduction devices, such as planetary gear assemblies, causes movement of the mounting portion toward the planetary gear assembly, adversely affecting the rotation and efficiency of the speed-reduction process.
Innovation Solution
A rotational speed-reduction device comprising a planetary gear reducer with a flange, sleeve, planetary bracket, planetary gear assemblies, bearings, input member, and output member is designed to connect robotic arms, where the planetary gear assemblies are fixedly connected to the bracket and bearings are used to reduce speed and increase torque, while minimizing vibration impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If planetary gear assemblies are used for speed reduction, then speed reduction and torque increase are achieved, but vibration causes movement of the mounting portion toward the planetary gear assembly, adversely affecting rotation
Solution Approach 1:
A buffer member is introduced as an intermediary element between the mounting portion and the planetary gear assembly. This buffer member absorbs vibrations and prevents direct transmission of vibrational forces that would cause the mounting portion to move toward the planetary gear assembly, thereby maintaining mounting stability while preserving the torque multiplication function.
Solution Approach 2:
The vibration generated during planetary gear operation, which was previously harmful causing mounting portion displacement, is converted into a beneficial effect by using it to press the planetary gear assembly against the drive gear. This ensures maintained meshing contact and stable transmission while the buffer member prevents excessive movement.
2Speed
If planetary gear assemblies are used for speed reduction, then speed reduction is achieved, but vibration adversely affects the rotation of the planetary gear assembly
Solution Approach 1:
The buffer member serves as a mediator that isolates the planetary gear assembly from vibrational disturbances. By absorbing and dampening vibrations before they reach the planetary gear assembly, the buffer member ensures smooth and stable rotation without adverse effects from vibrational forces.
3Strength
If rigid connection is used between mounting portion and planetary gear assembly, then structural strength is improved, but vibration-induced movement increases
Solution Approach 1:
The buffer member is positioned between the mounting portion and planetary gear assembly to act as a vibration-absorbing intermediary. This allows the connection to maintain structural strength for load bearing while the buffer member specifically addresses vibration-induced movement by absorbing these harmful oscillations before they can displace components.
Solution Approach 2:
The connection characteristics are changed by introducing a compliant buffer member that alters the mechanical impedance between the mounting portion and planetary gear assembly. This parameter change allows the system to maintain structural integrity for strength requirements while introducing vibration damping properties to reduce vibration-induced movement.
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 device effectively reduces speed and increases torque while minimizing vibration-induced movement, enhancing the rotational speed-reduction efficiency and stability between robotic arms.
Implementation Method 1
A rotational speed-reduction device comprises a planetary gear reducer configured to reduce a rotational speed of a first robotic arm and to increase a torque of the first robotic arm
Implementation Method 2
a first bearing sleeved on the positioning portion and a second bearing sleeved on the mounting portion
Data Source
AI summary
A rotational speed-reduction device is disclosed. The speed-reduction device includes a flange, a planetary bracket fixedly mounted on the flange, a planetary gear assembly movably mounted on the planetary bracket, a first bearing sleeved on the planetary bracket, an input member, and an output member. The planetary bracket includes a mounting portion, a fixing portion fixed to the flange, and a support portion. The support portion connects the mounting portion to the fixing portion. The planetary gear assembly includes a number of planetary gear pairs movably mounted between the fixing portion and the mounting portion, a fixing shaft passing through the planetary gear pairs, and rotation members movably received between the planetary gear pairs and sleeved on the fixing shaft. Opposite ends of the fixing shaft are connected to the mounting portion and the fixing portion, respectively.