Angle Impact Tool Forward Shaft Layout for High Torque
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Solution Overview
Problem
Existing angle impact tools lack the capability to deliver high output torque for effectively fastening bolts and screws, limiting their efficiency in applications requiring significant torque.
Innovation Solution
The design incorporates a brushless motor with a stator and rotor, an impact mechanism, an output shaft, and battery-mounting parts, where the impact mechanism and output shaft are positioned forward of the motor, enabling a maximum fastening torque of 500 N·m or more and less than 1,000 N·m, with specific configurations optimizing torque output through gear mechanisms and battery voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the impact mechanism and output shaft are positioned forward of the motor, then the maximum fastening torque is improved (500-1000 N·m), but the device complexity increases due to the need for optimized gear mechanisms and battery mounting arrangements
Solution Approach 1:
The patent repositions the impact mechanism and output shaft in the front-rear direction (orthogonal to the rotational axis) rather than along the rotational axis, creating a compact layout that achieves high torque (500-1000 N·m) while managing internal space efficiently
Solution Approach 2:
The device is divided into distinct functional modules: motor housing containing the brushless motor, battery-mounting parts for power supply, and the impact mechanism with output shaft positioned forward. This segmentation allows optimized torque transmission while managing complexity through modular design
2Force
If the brushless motor with forward-positioned impact mechanism is used, then the torque output is improved for fastening applications, but the weight distribution and balance become more challenging
Solution Approach 1:
The battery packs are mounted on dedicated battery-mounting parts positioned to counterbalance the forward-positioned impact mechanism and output shaft, creating a balanced weight distribution that manages the torque output while maintaining operational stability
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 configuration allows for a higher torque output, enhancing the tool's ability to fasten objects efficiently, meeting the requirements of various applications by optimizing motor output, impact rate, and gear reduction ratios.
Implementation Method 1
a brushless motor comprising a stator and a rotor, which rotates around a first rotational axis relative to the stator
Implementation Method 2
an impact mechanism (e.g., a hammer), which is rotated by the rotor; an output shaft, which is impacted by the impact mechanism and rotates around a second rotational axis
Data Source
AI summary
An angle impact tool includes: a brushless motor having a stator and a rotor, which rotates around a first rotational axis relative to the stator; an impact mechanism, which is rotated by the rotor; an output shaft, which is impacted by the impact mechanism and rotates around a second rotational axis; a motor housing, which houses the brushless motor; and one or more battery-mounting parts, on which one or more battery packs is (are respectively) mounted. In a front-rear direction, which is orthogonal to the second rotational axis, the impact mechanism and the output shaft are disposed more forward than the brushless motor. The front-rear direction and the output shaft are orthogonal to each other. The maximum fastening torque of the output shaft is 500 N·m or more and less than 1,000 N·m.