Working Machine Handle Backlash Reduction
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Solution Overview
Problem
Working machines with rotatable handles often experience backlash between the handle and the housing, leading to reduced user comfort and efficiency.
Innovation Solution
Incorporating an elastic member, such as rubber pins, between the housing and handle surfaces to reduce backlash and sliding friction, facilitating smoother handle rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle is attached to the housing such that the handle is rotatable about a rotation axis, then the ease of operation is improved, but backlash occurs between the handle and the housing
Solution Approach 1:
An elastic member is introduced as an intermediary component between the handle and the housing. This elastic member fills the gap between the handle and housing surfaces, eliminating backlash while allowing the handle to rotate smoothly about the rotation axis. The elastic member acts as a mediator that maintains continuous contact without restricting rotational movement.
2Ease of operation
If the handle is attached to the housing with an interval between surfaces, then the ease of operation is improved, but sliding friction occurs during handle rotation
Solution Approach 1:
The elastic member serves as a mediator between the handle and housing surfaces that are separated by an interval. By filling this gap, the elastic member eliminates direct contact between the handle and housing, thereby removing sliding friction while still allowing rotational movement to occur smoothly.
Solution Approach 2:
The elastic member changes the physical state of the gap between the handle and housing from an empty space to a filled elastic material. This parameter change transforms the interaction from friction-based to elastic deformation-based, allowing the handle to rotate without sliding friction while maintaining the necessary interval between surfaces.
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 elastic member effectively reduces backlash and sliding friction, enhancing user comfort and operational efficiency by allowing for smoother handle rotation.
Implementation Method 1
an elastic member arranged between the housing and the handle... The elastic member may be arranged between the first surface and the second surface
Implementation Method 2
sliding friction caused when the handle is rotated with respect to the housing can be reduced
Data Source
AI summary
A working machine may include: a working part; a prime mover configured to drive the working part; a housing supporting the working part; a handle attached to the housing such that the handle is rotatable about a rotation axis with respect to the housing and configured to be grasped by a user; and an elastic member arranged between the housing and the handle. The housing may comprise a first surface. The handle may include a second surface that faces the first surface in a rotation axis direction with an interval therebetween. The elastic member may be arranged between the first surface and the second surface.