Driver Drill Switching Ring Mounting for Compact Mode Variation
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Solution Overview
Problem
Existing driver drills with rotary striking mode require larger nuts to activate the switching mechanism, leading to increased size when shared with drills lacking this mode, necessitating a structure that accommodates variations while contributing to downsizing.
Innovation Solution
A work machine with a torque setting portion and a switching mechanism that includes a mounting portion for a switching member, allowing the nut to be movable and the switching mechanism to be disposed radially outside the spindle, utilizing a C-ring for mounting, which facilitates downsizing by enabling the nut and switching mechanism to be positioned optimally without extending the gear case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the nut is enlarged to activate the switching mechanism in rotary striking mode, then the switching mechanism can be activated, but the driver drill size increases
Solution Approach 1:
The switching mechanism is nested within the existing nut structure. The nut serves dual purposes: as the torque setting component and as the mounting base for the switching mechanism. The switching member is positioned inside the nut's internal space, allowing the switching mechanism to be activated by the nut's movement without requiring an enlarged nut outer diameter.
Solution Approach 2:
The switching mechanism utilizes the axial dimension of the nut's movement to activate the switching function. Instead of requiring radial enlargement of the nut, the invention uses the axial displacement of the nut during torque setting to engage or disengage the switching mechanism, effectively using the existing axial movement degree of freedom.
2Adaptability or versatility
If the switching mechanism is added to accommodate rotary striking mode, then mode switching capability is improved, but the device complexity increases
Solution Approach 1:
The switching mechanism is merged with the existing torque setting nut. The nut's axial movement, which is already required for torque adjustment, is combined with the switching function. This integration allows the switching mechanism to be activated without adding independent actuation mechanisms, thereby reducing overall system complexity.
Solution Approach 2:
The nut is given multi-functionality: it serves as both the torque setting component and the switching mechanism actuator. By making the nut universal, the invention eliminates the need for separate components for torque adjustment and mode switching, thereby reducing device complexity while maintaining versatility.
Data Source
AI summary
The present invention provides a downsizing while accommodating variations. In a driver drill, a switching ring of a switching mechanism for switching a striking-force-application mechanism of the driver drill to an inoperative or operative state is removably mounted to a nut of a clutch mechanism. In other words, the nut has a mounting portion for mounting the switching ring for switching an operation mode of a spindle. This allows the driver drill to accommodate variations while contributing to the downsizing of a body size.