Power Tool Grip Housing Layout for Vibration Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power tools have limited design flexibility in the grip region due to the large diameter of the motor, which restricts user operability and comfort.
Innovation Solution
A power tool design featuring a motor housed within an inner housing, with an elastic member between the inner and outer housings to reduce vibration transmission, allowing the grip region to be shaped for improved ergonomics and user comfort, and positioning the motor and tool accessory driving shaft in a way that eliminates the need for a large mechanism in the grip area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the motor is housed within the grip region to provide required torque, then the power output is sufficient, but the grip region shape is restricted and operability deteriorates
Solution Approach 1:
The housing is divided into an inner housing containing the motor and drive mechanism, and an outer housing forming the grip region. This segmentation allows the motor to be isolated in the inner housing while the outer housing provides an ergonomic grip shape, resolving the conflict between power output requirements and grip operability.
2Device complexity
If the motor is placed in the grip region, then the structure is compact, but vibration is directly transmitted to the user
Solution Approach 1:
The inner housing acts as an intermediary structure between the motor and the outer housing. It contains the vibration source (motor) and transmits minimal vibration to the outer housing, thereby protecting the user from harmful vibrations while maintaining structural compactness.
Solution Approach 2:
The motor and drive mechanism are extracted from the outer housing structure and placed within the inner housing. This extraction isolates the vibration source from the grip region, reducing vibration transmission to the user while preserving overall structural compactness.
3Adaptability or versatility
If a large mechanism is installed in the grip region to drive the tool accessory, then the drive function is achieved, but the degree of freedom in designing the grip shape is reduced
Solution Approach 1:
The drive mechanism is segmented and housed within the inner housing, separate from the outer housing that forms the grip. This allows the grip region to be designed with flexible shapes for ergonomic purposes while the inner housing contains the necessary drive components.
Solution Approach 2:
The drive mechanism is relocated from the traditional grip region space to the inner housing dimension. This dimensional reorganization allows the outer housing to be optimized for ergonomic grip shapes without compromising the drive function, which is accommodated in the inner housing space.
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
Enhances user operability by providing a more ergonomic grip and reducing vibration transmission to the user, preventing motor-related malfunctions and improving the tool's overall usability.
Implementation Method 1
The elastic member is disposed between the inner housing and the outer housing and reduces transmission of vibration from the inner housing to the outer housing. Specifically, transmission of vibration is reduced by elastic deformation of the elastic member.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
It is an object of the invention to provide a technique for increasing the degree of freedom in designing a grip part in order to improve operability of a power tool. A representative electric vibration tool 100 is provided which mainly includes a body housing 101, an inner housing 110, a driving motor 115 and a spindle 124. A blade 145 as a tool accessory is held between the spindle 124 and a clamp shaft 127 and driven by the driving motor 115. The driving motor 115 and the spindle 124 are housed within the inner housing 110. The inner housing 110 is housed within a front region of the body housing 101. A grip part 107 is arranged behind the front region of the body housing 101