Motor-Controlled Fastening Tool for Precise Striking Depth
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Solution Overview
Problem
Existing fastening tools using combustion pressure or compressed air struggle with adjusting the striking depth of a driver bit due to mechanical limitations, leading to instability and reduced operability, with the adjusting mechanism often being bulky and difficult to operate.
Innovation Solution
A fastening tool with a bit holding unit, a first drive unit for rotating the driver bit, and a second drive unit for moving the driver bit along an axis, controlled by a motor to precisely adjust the driver bit's movement, eliminating the need for mechanical adjustments near the nose unit and allowing for electronic control of the striking depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical adjusting mechanism is used to adjust the protrusion length of the contact arm, then the striking depth can be adjusted, but the number of components increases and the weight increases
Solution Approach 1:
The patent replaces the mechanical adjusting mechanism with an electric motor-driven system. The motor (15) drives the piston (12) through a drive mechanism, eliminating the need for complex mechanical linkages, adjustment rods, and manual operating mechanisms. This substitution reduces the number of components while enabling precise control of the striking depth through electrical signals.
2Measurement precision
If a mechanical adjusting mechanism is used to adjust the protrusion length of the contact arm, then the striking depth can be adjusted, but the weight increases
Solution Approach 1:
The patent replaces heavy mechanical adjustment components with a lightweight electric motor system. The motor (15) and its associated drive mechanism are significantly lighter than traditional mechanical adjustment mechanisms involving multiple linkages, springs, and manual operating components. This substitution reduces the overall weight of the tool while maintaining adjustment functionality.
3Ease of operation
If the adjusting mechanism is arranged near the nose unit, then the contact arm adjustment can be achieved, but the tip end-side of the tool becomes large
Solution Approach 1:
The patent relocates the adjustment mechanism from the nose unit area to the rear of the tool body by mounting the motor (15) on the rear surface. This spatial relocation allows the tip end of the tool to remain compact and small, while the motor-driven adjustment mechanism operates from the rear, eliminating the need for space-consuming mechanical linkages in the nose unit area.
4Ease of operation
If an elastic member such as rubber is used to advance the driver bit, then the driver bit can be moved, but the striking depth is not stabilized due to external factors such as environmental temperature
Solution Approach 1:
The patent replaces the elastic member (rubber) with an electric motor-driven piston system. The motor (15) directly controls the movement of the piston (12) which in turn advances the driver bit (5). This motorized system eliminates the temperature-dependent properties of elastic members, providing consistent and stable striking depth regardless of environmental temperature changes.
5Ease of operation
If the operation unit such as a dial is arranged near the nose unit, then the adjusting mechanism can be operated, but the operability of the depth adjustment is not optimized
Solution Approach 1:
The patent relocates the operation unit from the nose unit area to the rear of the tool body, where it can be more easily accessed by the operator's hand. The motor (15) and its operating mechanism are positioned on the rear surface, allowing the operator to comfortably adjust the striking depth without straining to reach the nose unit area. This spatial reorganization in another dimension (from front to rear) optimizes operability.
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
This configuration simplifies the tool design, improves the accuracy and range of striking depth adjustment, stabilizes the striking depth against environmental factors, and enhances operability by dispersing weight and simplifying the drive mechanism, allowing for precise control of the driver bit's movement.
Implementation Method 1
a second drive unit having a second motor configured to move the driver bit along the axis direction
Implementation Method 2
a first drive unit having a first motor configured to rotate the driver bit held on the holding member by the bit holding unit
Data Source
AI summary
A fastening tool includes: a bit holding unit having a holding member configured to hold a driver bit so as to be rotatable and to be movable in an axis direction; a first drive unit having a first motor configured to rotate the driver bit held on the holding member by the bit holding unit; a second drive unit having a second motor configured to move the driver bit along the axis direction; and a control unit configured to control an amount of movement of the driver bit along the axis direction by an amount of rotation of the second motor.