Impact Tool Hammer Fixing Member Dynamics
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Solution Overview
Problem
Existing impact tools either produce strong fastening forces with loud noise or provide small fastening forces with minimal noise, lacking a solution for selective operation between impact and electronic pulse modes.
Innovation Solution
An impact tool with a motor-driven hammer that can rotate in both forward and reverse directions, featuring a fixing member to selectively allow or prevent hammer movement, enabling operation in impact or electronic pulse modes, and a controller to manage motor rotation for different modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the hammer is allowed to move in the second direction after striking the anvil, then the impact driver provides strong fastening force, but noise during fastening work becomes loud
Solution Approach 1:
The fixing member transitions from a static component to a dynamic one that can change its state between allowing and preventing hammer movement in the second direction. This dynamic adjustment enables the tool to switch between impact driver mode (hammer moves, strong fastening force) and electronic pulse driver mode (hammer fixed, reduced noise), resolving the contradiction between fastening force and noise generation.
2Object-generated harmful factors
If the hammer is prevented from moving in the second direction, then noise during fastening work is reduced, but the fastening force becomes small
Solution Approach 1:
The fixing member's ability to dynamically change its constraint state on the hammer allows the tool to switch between electronic pulse driver mode (hammer fixed, reduced noise) and impact driver mode (hammer moves, strong fastening force). This dynamic adjustment resolves the contradiction between noise reduction and fastening force generation.
3Adaptability or versatility
If the impact tool is designed to selectively operate in impact mode or electronic pulse mode, then versatility is improved, but device complexity increases
Solution Approach 1:
The impact tool achieves multi-functionality by incorporating a fixing member that can selectively prevent or allow hammer movement in the second direction. This single additional component enables the tool to perform both impact driver operations (strong fastening force) and electronic pulse driver operations (reduced noise), providing versatility without requiring multiple separate tools or complex additional mechanisms.
Data Source
AI summary
An impact tool (1) includes a motor (3); a hammer (42) having a rotational axis extending in a first direction, the hammer (42) being rotatable in a rotational direction including a forward direction and a reverse direction opposite to the forward direction by the motor (3) and being movable in the first direction and a second direction opposite to the first direction; an anvil (52) disposed at the first direction side of the hammer (42) and strikable by the hammer (42) in the forward direction, the hammer (42) that has been struck the anvil (52) being moved in the second direction to come free from the anvil (52); and a fixing member (45A, 46A) that selectively allows the hammer (42) to move in the second direction or prevents the hammer (42) from moving in the second direction.