Position Control Device for Angle Drill Motor Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional carpenter angle drill/hollow chisel mortisers pose safety risks and energy wastage due to continuous motor operation during both drilling and retraction, and the limiting blocks' positioning can alter the drill stroke, affecting processing quality.
Innovation Solution
A position controlling device with a mounting group, positioning group, and retaining arm that includes limiting blocks, a holding frame, and a circuit breaker, which automatically stops the drill motor when the moving base reaches the top dead center, preventing the drill from rotating during retraction and maintaining consistent stroke settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor continues to operate during both drilling and retraction, then the drill can complete the full cycle operation, but the drill rotates during retraction causing safety risks and energy wastage
Solution Approach 1:
The circuit breaker receives feedback from the retaining arm's position and automatically interrupts the motor circuit when the drill reaches the top dead center position during retraction, eliminating the need for manual intervention and preventing harmful rotation
Solution Approach 2:
The system automatically stops the motor at the appropriate position through the interaction between the retaining arm and circuit breaker, making the safety function self-regulating without requiring external control
2Manufacturing precision
If the retaining arm contacts the limiting blocks during drilling operation, then the drill stroke is limited, but the positions of the limiting blocks relative to the bridge bar change affecting processing quality
Solution Approach 1:
The circuit breaker and contacting slice are extracted from the limiting blocks and mounted separately on the bridge bar, allowing the limiting blocks to remain fixed on the bridge bar while the electrical control function is independently positioned
Solution Approach 2:
The circuit breaker acts as an intermediary between the retaining arm's mechanical position and the motor control system, providing precise electrical interruption without requiring direct mechanical contact that would displace the limiting blocks
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
Ensures safe operation by stopping the drill motor during retraction, preventing injuries and energy wastage, while maintaining consistent drill stroke settings for improved processing quality.
Implementation Method 1
The retaining arm selectively abuts the contacting slice of the circuit breaker to enable the circuit breaker at a turn-off condition
Data Source
AI summary
A position controlling device for a carpenter angle drill/hollow chisel mortiser has a mounting group, a positioning group, and a retaining arm. The mounting group has two crossbars and a bridge bar. The bridge bar is connected to the crossbars. The positioning group is connected to the mounting group, and has two limiting blocks, a holding frame, and a circuit breaker. The limiting blocks are connected to the bridge bar between the crossbars. The holding frame is securely connected to one of the limiting blocks. The circuit breaker is mounted in the holding frame and has a contacting slice and an electric wire. The contacting slice is elastically connected to the circuit breaker, and transversally extends out of the holding frame. The retaining arm selectively abuts the contacting slice of the circuit breaker to enable the circuit breaker at a turn-off condition.