Fastening Tool Bit Feed Mechanism for Precise Screw Pressing
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Solution Overview
Problem
Existing fastening tools struggle to control the precise movement of a driver bit in the direction of screw fastening and face challenges in maintaining a compact size without increasing the tool's dimensions along the handle's extension direction.
Innovation Solution
A fastening tool design featuring a cylindrical rotation guide member, a holding member that moves axially and rotates with the guide member, a moving member to control axial movement, a motor-driven rotation member, and a flexible transmission member to manage the screw's engagement and fastening.
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 the tool structure is simplified and no motor or substrate is required, but the handling property deteriorates due to the need to connect and use an air hose
Solution Approach 1:
The patent replaces the air pressure system with an electric motor system. The motor rotates the bit directly, and the moving member is driven by the rotation of the bit through a transmission mechanism (such as a rack and pinion or cam mechanism), eliminating the need for air hoses and improving handling properties while maintaining structural simplicity.
Solution Approach 2:
The patent introduces a moving member as an intermediary between the rotating bit and the driver bit. The moving member converts the rotational motion of the bit into linear motion in the fastening direction, allowing the motor to drive the fastening process without requiring complex direct coupling mechanisms.
2Volume of moving object
If spring urging is used to strike the screw, then the tool can be compact, but it is difficult to control the amount of movement of the driver bit in the fastening direction
Solution Approach 1:
The patent replaces the spring urging mechanism with a motor-driven system. The motor controls the rotation of the bit, and through the transmission mechanism involving the moving member, precisely controls the linear movement of the driver bit in the fastening direction. This enables accurate movement control while maintaining a compact tool structure.
Solution Approach 2:
The patent incorporates a control unit that monitors and controls the motor operation. The control unit can detect the position and movement of the driver bit and adjust the motor operation accordingly, enabling precise control of the driver bit movement in the fastening direction through feedback mechanisms.
3Device complexity
If the substrate is provided between the handle and the battery, then the electronic components are accommodated, but the dimension of the tool along the extension direction of the handle is increased
Solution Approach 1:
The patent relocates the substrate from the longitudinal direction (between handle and battery) to the radial direction (on the outer periphery of the battery). This dimensional change allows the electronic components to be accommodated without increasing the tool's length along the handle extension direction, maintaining a compact overall structure.
Solution Approach 2:
The patent nests the substrate on the outer periphery of the battery, utilizing the battery's cylindrical structure. The substrate is positioned concentrically around the battery, effectively using the battery's volume and outer surface area to accommodate electronic components without adding to the tool's overall dimensions.
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 design allows for precise control of the driver bit's movement, enhancing the tool's ability to accurately fasten screws while maintaining a compact size by optimizing the use of space within the tool's structure.
Implementation Method 1
a rotation member configured to be driven and to rotate by a motor; and a transmission member connected to the moving member and having flexibility to be wound along an outer periphery of the rotation member, wherein the rotation member is rotated by the motor, so that the moving member is moved with the transmission member
Implementation Method 2
a cylindrical rotation guide member extending in one direction and rotatably supported by a bearing
Data Source
AI summary
A fastening tool includes: a cylindrical rotation guide member extending in one direction and rotatably supported; a holding member having an opening in which a driver bit is detachably inserted, and configured to move in an axis direction along the extension direction of the rotation guide member inside the rotation guide member and to rotate together with the rotation guide member; and a moving member configured to move the holding member in a front and rear direction along the rotation guide member; a rotation member; and a transmission member connected to the moving member and having flexibility to be wound along an outer periphery of the rotation member. The rotation member is rotated by the motor, so that the moving member is moved with the transmission member in one direction in which a screw engaged with the driver bit is pressed against a fastening target.