Bolt-Gripping Fastening Tool With Thrust Bearings for Compact Swaging
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Solution Overview
Problem
Existing fastening tools using fasteners with integrated bolt shafts face challenges in achieving a compact device structure while ensuring precise output management and reliable release of the fastener without breaking the shaft part during swaging operations.
Innovation Solution
A fastening tool with a bolt-gripping part, anvil, and a bolt-gripping-part driving mechanism, utilizing a ball-screw mechanism or rack-and-pinion mechanism, and incorporating thrust rolling bearings to manage axial forces and prevent interference with rotation, allowing for compact design and efficient swaging and release operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluid pressure is used to control output management during swaging operation, then close output management is achieved and fastener release is reliable, but device structure becomes non-compact
Solution Approach 1:
The patent replaces the fluid pressure control system with a mechanical control system. A control member (lever or button) is provided that can be operated manually to control the relative movement between the bolt-gripping part and anvil. This mechanical control mechanism eliminates the need for complex fluid pressure generation and control components, achieving a compact device structure while maintaining reliable output management during swaging operation and fastener release.
2Length of stationary object
If the end region of the shaft part is broken and removed after swaging, then the fastener is reduced in height, but additional coating process is required
Solution Approach 1:
The patent enables the end region of the shaft part to be automatically broken and removed through the swaging process itself. The bolt-gripping part applies radial compressive force to the collar, which swages the collar onto the shaft part. This swaging action naturally causes the end region of the shaft part to break and separate from the main shaft, eliminating the need for additional manual breaking operations and subsequent coating processes.
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
The tool effectively completes swaging with the bolt shaft end region integrated, achieving close output management and reliable release of the fastener, enhancing working efficiency and tool compactness.
Implementation Method 1
utilizing a ball-screw mechanism or rack-and-pinion mechanism
Implementation Method 2
utilizing a ball-screw mechanism or rack-and-pinion mechanism
Implementation Method 3
incorporating thrust rolling bearings to manage axial forces and prevent interference with rotation
Data Source
AI summary
A fastening tool includes a bolt-gripping part, an anvil, a bolt-gripping-part driving mechanism, a motor, a housing, and thrust rolling bearings. The bolt-gripping-part driving mechanism includes a first mechanism part supported by the housing and a second mechanism part connected to the bolt-gripping part. The second mechanism part is configured to be driven in a longitudinal-axis direction by the first mechanism part being rotationally driven, so that the bolt-gripping part is moved in the longitudinal-axis direction relative to the anvil. The thrust rolling bearings are disposed on a first direction side and a second direction side of the first mechanism part, respectively.