Angle Drill Housing Materials for High Torque at Lower Weight
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Solution Overview
Problem
Angle drills face a trade-off between high output torque and user comfort due to increased weight, as existing solutions prioritize performance over usability by adding weight to achieve higher torque.
Innovation Solution
The design incorporates a transmission box housing made from materials of different densities, reducing overall weight while maintaining high output torque and power, with a power-to-weight ratio of at least 220 W/kg, and includes a ergonomic handle mechanism and efficient heat dissipation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the output torque is increased to meet heavy load requirements, then the working performance is improved, but the overall weight of the product increases
Solution Approach 1:
The transmission box housing uses composite materials including aluminum alloy and plastic, combining the strength of metal with the lightness of plastic to reduce overall weight while maintaining structural integrity and torque transmission capability
Solution Approach 2:
Different parts of the transmission box housing use different materials with appropriate densities - critical load-bearing areas use stronger materials while non-critical areas use lighter materials, optimizing the weight-strength balance for high torque output
2Ease of operation
If the product weight is reduced to improve user comfort, then the ease of operation is improved, but the output torque capability may be compromised
Solution Approach 1:
The transmission box housing uses composite materials including aluminum alloy and plastic, combining the strength of metal with the lightness of plastic to reduce overall weight while maintaining structural integrity and torque transmission capability
Solution Approach 2:
The patent achieves a power-to-weight ratio of at least 220 W/kg, optimizing the balance between weight and power output to ensure both user comfort and sufficient torque capability for heavy load applications
Data Source
AI summary
An angle drill includes a housing; an electric motor at least partially disposed in the housing and including a motor shaft rotating about a motor axis; an energy source supplying power to the electric motor and detachably connected to the housing; and an output mechanism including an output shaft rotating about a first axis, where the output shaft is driven by the electric motor, and the first axis intersects with the motor axis. When the torque of the output shaft is greater than or equal to 10 N·m, the ratio of the output power of the angle drill to the weight of the angle drill is greater than or equal to 220 W/kg.