Power Tool Chuck Control Mechanism for Quick Attachment Locking
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Solution Overview
Problem
Existing power tools require complex operations to quickly lock and release drill bits, involving separate manual control of clamping sleeves and chuck bodies, leading to safety issues and a bulky design due to multiple components and intricate connections.
Innovation Solution
A compact power tool with a control mechanism that allows for one-button operation to lock or release drill bits by moving a control member from an initial to a working position, using a clutch mechanism and transmission mechanisms to control the motor's direction and engage the clamping sleeve relative to the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control of clamping sleeve and chuck body is used for locking and releasing drill bits, then the power tool can lock and release drill bits, but the operation becomes complex and safety issues arise due to friction with hand when components rotate at extreme positions
Solution Approach 1:
The patent replaces the manual mechanical control system with an automated control system. The control mechanism includes a control member that automatically controls the motor to rotate the chuck body, which in turn controls the clamping jaws to lock or release the drill bit. This eliminates the need for manual rotation of the clamping sleeve, solving both the complexity of operation and the safety issue of hand friction during rotation.
Solution Approach 2:
The system performs self-service through automatic control. When the control member is operated, it automatically initiates the motor to rotate in the preset direction, the chuck body rotates accordingly, and the clamping jaws automatically lock or release the drill bit without requiring continuous manual intervention. The system serves itself by converting a single control input into a complete locking or releasing sequence.
2Ease of operation
If multiple components and intricate connections are used for control mechanism, then the power tool can lock and release drill bits, but the device size becomes huge and weight increases
Solution Approach 1:
The patent merges multiple control functions into a single integrated control mechanism. The control member simultaneously controls the motor rotation direction, the chuck body rotation, and the clamping jaw movement. By combining these functions into one unified system rather than separate mechanisms, the overall device size and weight are reduced while maintaining the locking and releasing functionality.
Solution Approach 2:
The control member serves multiple functions: it controls the motor to rotate in preset directions, it controls the chuck body to rotate, and it indirectly controls the clamping jaws to lock or release drill bits. This multi-functionality reduces the need for separate control components, thereby reducing the overall device weight and size.
3Adaptability or versatility
If separate control mechanisms for locking and releasing are used, then the power tool can perform locking and releasing operations, but the device complexity increases due to multiple components and intricate connections
Solution Approach 1:
The patent combines the locking and releasing control functions into a single control mechanism. The control member, when operated, automatically controls the motor to rotate the chuck body in the appropriate direction, which in turn controls the clamping jaws to either lock or release the drill bit. This unified approach eliminates the need for separate control mechanisms for locking and releasing, thereby reducing device complexity while maintaining full functionality.
4Extent of automation
If clutch mechanism and transmission mechanisms are added to control motor direction and engage clamping sleeve, then the power tool achieves automated locking and releasing, but the device complexity increases
Solution Approach 1:
The patent merges the clutch mechanism and transmission mechanisms into a single integrated control system. The control member directly controls the motor rotation, which through the chuck body rotation, automatically engages or disengages the clamping jaws. By combining these mechanisms into one unified system rather than separate components, the automation function is achieved while minimizing the increase in device complexity.
Data Source
AI summary
A power tool and operation method for quick locking and releasing working attachment thereof are provided. The power tool includes a housing; a motor in the housing; an output shaft driven by the motor; and a chuck to lock and release a working attachment, said chuck including a chuck body coupled with the output shaft, jaws movably disposed relative to the chuck body, and a clamping sleeve outside the chuck body. The clamping sleeve is movable with respect to the chuck body so as to drive the jaws to retract and open relative to the chuck body. A control mechanism is operable to lock the clamping sleeve or the chuck body relative to the housing, and to control the motor initiating along a preset rotary direction so that relative movement between the clamping sleeve and the chuck body is generated.