Striking Tool Clutch for Motor Cooling and Service Time
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Solution Overview
Problem
Existing electric striking tools face heat generation issues due to high motor load and inefficient cooling systems, leading to reduced service time and increased weight and complexity.
Innovation Solution
A striking tool with a clutch mechanism that interrupts motor drive force to the striking mechanism during stop or deceleration, allowing the cooling unit to operate independently and efficiently cool the motor, thereby extending service time and enabling high-output motor usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high spring modulus spring is used to increase striking output, then striking power is improved, but motor load increases and heat generation increases
Solution Approach 1:
The clutch mechanism enables periodic engagement and disengagement of the motor from the striking mechanism. During striking operations, the clutch engages to transmit power; during intervals, it disengages to allow motor cooling. This periodic action pattern matches the natural rhythm of striking operations, allowing the motor to generate high power when needed while cooling during rest periods, thereby resolving the contradiction between high striking output and motor heat generation.
2Temperature
If a cooling fan is attached to the motor, then cooling effect is improved, but the motor only rotates briefly during striking operations making cooling insufficient
Solution Approach 1:
The clutch mechanism is designed to maintain engagement during cooling periods, allowing the cooling fan to rotate in advance and during the intervals between striking operations. This preliminary and continuous cooling action ensures that the motor is adequately cooled before the next high-power striking operation, resolving the issue of insufficient cooling time.
3Temperature
If a separate cooling system with electric motor is provided, then cooling capability is improved, but device weight increases and structure becomes complicated
Solution Approach 1:
The clutch mechanism serves multiple functions: it transmits power during striking operations and simultaneously enables the cooling fan to rotate during intervals. By making the clutch a multi-functional component that handles both power transmission and cooling activation, the patent eliminates the need for a separate cooling system motor, thereby reducing weight and structural complexity while maintaining effective cooling capability.
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 cools the motor, prolongs the striking tool's service time, reduces weight, and allows for higher output without excessive heat generation, enhancing operational efficiency and reliability.
Implementation Method 1
a clutch provided between the striking mechanism and the motor and configured to switch transmission and interruption of a drive force of the motor to the striking mechanism
Implementation Method 2
a cooling unit configured to cool the motor
Data Source
AI summary
A striking tool includes: a striking mechanism configured to strike a fastener into a member to be struck; a motor configured to drive the striking mechanism; and a clutch provided between the striking mechanism and the motor and configured to switch transmission and interruption of a drive force of the motor to the striking mechanism.