Grinder Brake and Switch Control via Sliding Link Mechanism
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Solution Overview
Problem
The existing grinder designs with brake assemblies and interlocking mechanisms have a complex structure that increases the number of components, leading to potential operational issues such as cumulative tolerance and misalignment, affecting the reliability and ease of use.
Innovation Solution
A simplified grinder design with a sliding member and link member that directly or indirectly controls both the brake assembly and switch, reducing the number of components and ensuring synchronized operation by rotating between specific positions to turn the brake on and off and turn the switch on and off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate link member and lever member are used to control the brake assembly and switch separately, then the brake assembly and switch can be controlled independently, but the number of components increases and cumulative tolerance lowers operability
Solution Approach 1:
The patent merges the control functions by making the slide bar perform both brake control and switch control functions. The slide bar directly actuates the brake assembly while also mechanically connecting to the switch, eliminating the need for separate link member and lever member, thus reducing component count while maintaining independent control capability
Solution Approach 2:
The slide bar is designed as a multi-functional component that simultaneously controls the brake assembly release and actuates the switch. This universal component replaces what would traditionally require multiple specialized parts, reducing overall device complexity while preserving the ability to independently control both functions
2Adaptability or versatility
If multiple components are used in the interlocking assembly, then the brake assembly and switch can be controlled separately, but cumulative tolerance causes operational misalignment
Solution Approach 1:
By merging the control path into a single slide bar mechanism, the patent eliminates multiple connection points where tolerance accumulation could occur. The direct mechanical connection from slide bar to both brake assembly and switch ensures synchronized operation while maintaining separate control capability
Solution Approach 2:
The patent extracts and eliminates the intermediate link member and lever member that caused tolerance accumulation. By removing these intermediate components, the direct mechanical transmission path ensures that the slide bar's movement is directly transmitted to both the brake assembly and switch without cumulative tolerance errors
3Device complexity
If a simple structure with fewer components is used, then the operability and reliability improve, but the brake assembly and switch may operate at different times
Solution Approach 1:
The slide bar serves as an intermediary component that coordinates the timing of brake assembly release and switch actuation. By making the slide bar the common actuator for both functions, it ensures that both operations occur simultaneously in response to the same input motion, preventing operational desynchronization
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
This design reduces the likelihood of operational misalignment and enhances the reliability and ease of use by minimizing components and ensuring synchronized operation of the brake assembly and switch, allowing for easy and reliable operation.
Implementation Method 1
a coil spring (33) pressing the brake member (32) toward the brake plate (31)
Implementation Method 2
a link member (52) rotating between a right rotational position to move the slide bar (51) to the advanced position and a left rotational position to move the slide bar (51) to the retracted position
Data Source
AI summary
A grinder includes a motor including an output shaft, a housing accommodating the motor, a switch, a brake member movable back and forth between a rear braking position and a front brake release position, a switch lever movable between an initial position and a depressed position, a sliding member slidable between a first position to move the brake member to the brake release position and a second position to move the brake member to the braking position to turn on the switch at the first position and turn off the switch at the second position, and a link member rotatable between a first rotational position to move the sliding member to the first position and a second rotational position to move the sliding member to the second position.