Impact Tool Second Spring Movement Restrictor
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Solution Overview
Problem
The existing impact rotating tools with a second spring experiencing free movement generate abnormal noise due to its unrestricted movement, which affects the operational efficiency and noise levels.
Innovation Solution
Incorporating a movement restrictor to limit the free movement of the second spring, which is achieved by using a third spring to urge the second spring backward and restrict its movement relative to the spindle, thereby reducing noise and improving operational stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a second spring with smaller strand diameter and shorter overall length is used, then the device complexity is reduced, but abnormal noise is generated due to free movement
Solution Approach 1:
A movement restrictor is introduced as an intermediary component between the second spring and the hammer case. This restrictor limits the free movement of the second spring, preventing abnormal noise generation while maintaining the simplified spring configuration. The restrictor acts as a mediator that constrains the spring's motion without requiring a complete redesign of the spring system.
2Ease of operation
If the second spring is allowed to move freely, then the ease of operation is improved, but operational stability deteriorates due to unwanted vibrations
Solution Approach 1:
The movement restrictor serves as a mediator that selectively constrains the second spring's movement. It allows the spring to perform its necessary function of urging the hammer backward while preventing excessive free movement that causes vibrations and instability. This maintains ease of operation while improving operational stability.
3Object-generated harmful factors
If a movement restrictor is added to restrict the second spring, then abnormal noise is reduced, but device complexity increases
Solution Approach 1:
The movement restrictor is designed as a separate, extractable component that can be independently added to the existing spring mechanism. This modular approach allows the noise reduction function to be implemented without completely redesigning the spring system, thereby minimizing the increase in overall device complexity.
4Stability of the object's composition
If the second spring is restricted in movement, then operational stability is improved, but ease of operation deteriorates
Solution Approach 1:
The movement restrictor is designed as a clever intermediary mechanism that maintains operational simplicity while ensuring stability. It allows the second spring to function naturally in its intended range of motion while automatically preventing excessive movement that would compromise stability, thus preserving ease of operation.
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 restricts the free movement of the second spring, reducing abnormal noise and enhancing the operational efficiency of the impact tool by minimizing unwanted vibrations and noise generation.
Implementation Method 1
a first spring constantly urging the hammer forward
Implementation Method 2
a second spring configured to urge, forward, the hammer moving backward from a reference position
Implementation Method 3
using a third spring to urge the second spring backward and restrict its movement relative to the spindle
Data Source
AI summary
An impact tool includes a second spring with restricted free movement. The impact tool includes a motor, a spindle rotatable with a rotational force generated by the motor, a hammer supported by the spindle in a manner movable in a front-rear direction and in a rotation direction, an anvil to be struck by the hammer in the rotation direction, a first spring constantly urging the hammer forward, a second spring that urges, forward, the hammer moving backward from a reference position, a hammer case accommodating the hammer, the first spring, and the second spring, and a movement restrictor that restricts movement of the second spring in an internal space of the hammer case.