Driver Torque Suppression Mechanism for Motor Load Reduction
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Solution Overview
Problem
The existing driver mechanisms experience an increase in motor load torque when the striking mechanism moves from the bottom dead center to the top dead center, leading to larger and heavier motor designs to accommodate this load, which is undesirable for size and weight reduction.
Innovation Solution
The driver incorporates a torque suppression mechanism, including a pin wheel with varying radii and a power conversion mechanism that adjusts torque transmission as the striking mechanism moves, reducing the load torque by changing the radii of the pin wheel pins and using a material with higher mass to accumulate moment of inertia, thereby reducing the motor's load when approaching the top dead center.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the striking mechanism is moved against the pressure of the pressure accumulation chamber, then the striking mechanism can be positioned at the top dead center, but the load torque of the motor increases significantly
Solution Approach 1:
The pressure accumulation chamber acts as a counterweight mechanism that stores potential energy during the upward movement of the striking mechanism and releases it during the downward striking motion, thereby reducing the peak load torque on the motor when positioning the striking mechanism at the top dead center
Solution Approach 2:
The system transitions from static motor sizing based on peak load to dynamic operation where the motor works in conjunction with the pressure accumulation chamber, allowing the motor to operate at more uniform, lower torque levels while the chamber provides supplemental force during critical phases
2Reliability
If the motor and speed reduction gear are sized to accommodate peak load torque, then the striking mechanism can be moved reliably, but the size and weight of the motor increase
Solution Approach 1:
The pressure accumulation chamber serves as a mechanical counterweight that offsets the weight and惯性 of the striking mechanism, allowing the motor to be sized for average operational loads rather than peak loads, thereby reducing motor weight while maintaining reliable operation
Solution Approach 2:
The pressure accumulation chamber is pre-charged with compressed gas before operation, storing energy in advance that is released during the striking cycle, enabling the motor to operate at lower, more consistent power levels
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
This solution effectively suppresses the increase in motor torque when the striking mechanism moves to the top dead center, allowing for a smaller and lighter motor design while maintaining efficient operation.
Implementation Method 1
a pressure accumulation chamber configured to move the striking mechanism in the first direction to strike a fastener
Implementation Method 2
using a material with higher mass to accumulate moment of inertia, thereby reducing the motor's load when approaching the top dead center
Data Source
AI summary
A driver capable of suppressing increase in a load torque of a motor when a striking mechanism is moved by the torque of the motor against a force of a first moving mechanism is provided. The driver includes a striking mechanism 12 movable in a first direction B1 and a second direction B2 opposite to the first direction B1 and a first moving mechanism configured to move the striking mechanism 12 in the first direction B1 to strike a fastener, and the driver further includes a motor, a second moving mechanism 45 rotated by the torque of the motor and configured to move the striking mechanism 12 in the second direction against a force of the first moving mechanism, and torque suppression mechanisms 45A to 45H configured to suppress increase in the torque of the motor when the striking mechanism 12 is moved in the second direction B2.