Motor-Driven Bit Feed Mechanism for Compact Screw Fastening
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Solution Overview
Problem
Existing screw striking machines face difficulties in controlling the movement of the driver bit during screw fastening and tend to increase in size due to the placement of a substrate and battery configuration, affecting handling and efficiency.
Innovation Solution
A fastening tool with a cylindrical rotation guide member, a holding member, a moving member, and a transmission member, where the rotation member is driven by a motor, allowing precise control of the driver bit's movement and reducing the tool's size by integrating the substrate and battery placement effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air pressure is used to rotate the bit and move it in the fastening direction, then no motor or substrate is required, but an air hose must be connected which deteriorates handling property
Solution Approach 1:
The patent replaces the air pressure system with an electric motor system. The motor rotates the bit through a rotation transmission mechanism and moves the bit in the fastening direction through a movement transmission mechanism, eliminating the need for air hoses and improving handling property while maintaining operational capability
Solution Approach 2:
The patent transitions from pneumatic actuation (air pressure) to electric actuation (motor). The motor-driven system uses rotational motion transmitted through gears or belts to achieve both bit rotation and axial movement, replacing the pneumatic system's dual-function approach with a more compact electric system
2Ease of operation
If a spring is compressed by a motor to strike the screw, then no air hose is needed, but it is difficult to control the amount of movement of the driver bit
Solution Approach 1:
The patent employs a dynamic movement transmission mechanism where the motor's rotational motion is converted to precise linear movement of the driver bit through controlled transmission elements. This allows the system to adapt the movement amount dynamically based on fastening requirements, achieving both good handling and precise movement control
Solution Approach 2:
The patent changes the control parameter from spring compression force to motor rotation control. By controlling the motor's rotational speed, direction, and duration, the system can precisely control the driver bit's movement amount in the fastening direction, enabling accurate depth control for different fastening applications
3Device complexity
If the substrate is provided between the handle and the battery, then the control circuit can be accommodated, but the dimension of the tool along the handle extension direction increases
Solution Approach 1:
The patent relocates the substrate from the longitudinal position (between handle and battery) to a transverse or radial position (side surface of the tool body). This dimensional change allows the control circuit to be accommodated without increasing the tool's length along the handle extension direction, maintaining compact dimensions while integrating electronic control capability
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
Enables precise control of the driver bit's movement for efficient screw fastening while maintaining a compact tool size, improving handling and reducing the time required to press the screw against the fastening target.
Implementation Method 1
a rotation member configured to be driven and to rotate by a motor; wherein the rotation member is rotated by the motor, so that the moving member is moved with the transmission member in one direction
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A fastening tool (1) includes: a cylindrical rotation guide member (31) extending in one direction and rotatably supported; a holding member (30) having an opening (30a) in which a driver bit (2) is detachably inserted, and configured to move in an axis direction along the extension direction of the rotation guide member (31) inside the rotation guide member (31) and to rotate together with the rotation guide member (31); and a moving member (32) configured to move the holding member (30) in a front and rear direction along the rotation guide member (31); a rotation member (52) configured to be driven and to rotate by a motor (50); and a transmission member (54) connected to the moving member (32) and having flexibility to be wound along an outer periphery (52a) of the rotation member (52). The rotation member (52) is rotated by the motor (50), so that the moving member (32) is moved with the transmission member (54) in one direction in which a screw (200) engaged with the driver bit (2) is pressed against a fastening target.