Bidirectional Clutch Screwing Tool for Multi-Torque Fastening
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Solution Overview
Problem
Conventional screwing tools require separate tools for attaching positioning-and-clamping elements with different torque requirements, leading to increased costs and assembly times in industries like automobile manufacturing.
Innovation Solution
A screwing tool with a movable mounting part and a shiftable clutch system that allows for different torque applications using a single tool, featuring a ring-shaped screwing tool and a screwdriver bit, where the clutch system includes a non-positive friction clutch and an optional positive clutch to manage torque distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate screwing tools are used for bushing and internal screw with different torque requirements, then each fastening element can be tightened with appropriate torque, but the number of tools required increases and assembly time increases
Solution Approach 1:
The patent combines two separate screwing tools (one for bushing with first torque, another for internal screw with second torque) into a single integrated screwing tool. The mounting part can rotate in two directions: clockwise to engage the bushing's drive contours, and counterclockwise to engage the internal screw's drive contours, eliminating the need for separate tools and reducing assembly time while maintaining torque accuracy through direction-dependent clutch engagement
Solution Approach 2:
The mounting part is designed with dynamic rotational capability that can switch between two rotation directions (clockwise and counterclockwise). This dynamic behavior allows the single tool to adapt to different fastening requirements: rotating clockwise engages the first clutch for bushing tightening, while rotating counterclockwise engages the second clutch for internal screw tightening, enabling one tool to perform functions previously requiring two separate tools
2Productivity
If a single screwing tool is used for both bushing and internal screw, then the number of tools is reduced and assembly time decreases, but the device complexity increases
Solution Approach 1:
The screwing tool is segmented into functionally distinct components: a mounting part that can rotate bidirectionally, a first clutch mechanism engaged by clockwise rotation for bushing operation, and a second clutch mechanism engaged by counterclockwise rotation for internal screw operation. This segmentation allows each component to have a specialized function while working together in a unified tool, reducing overall complexity compared to maintaining two separate tools
Solution Approach 2:
The mounting part is designed as a universal component that performs multiple functions by rotating in different directions. It can engage both the bushing's drive contours (clockwise rotation) and the internal screw's drive contours (counterclockwise rotation), making a single tool versatile enough to replace two specialized tools and simplifying the overall system while improving productivity
3Reliability
If different shut-off clutches with different torques are kept on hand, then different fastening elements can be tightened with appropriate torque, but the quantity of tools required increases
Solution Approach 1:
The clutch system is designed with dynamic engagement characteristics where the first clutch engages during clockwise rotation for bushing tightening and the second clutch engages during counterclockwise rotation for internal screw tightening. This dynamic switching allows a single tool to provide torque control for different fastening elements, enhancing versatility while maintaining reliable torque control through direction-dependent clutch selection
Solution Approach 2:
The screwing tool achieves universal applicability by incorporating two clutch mechanisms that can be selectively engaged through rotation direction. The first clutch handles bushing fastening with its specific torque requirement, while the second clutch handles internal screw fastening with its different torque requirement, allowing one versatile tool to replace multiple specialized tools and improve adaptability
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 the use of a single screwing tool for various fastening elements with different torque requirements, reducing the need for multiple tools and minimizing assembly time and costs by allowing precise torque control.
Implementation Method 1
The shiftable clutch is preferably designed to be nonpositive and self-shifting and especially to be in the form of a friction clutch, which, when the tightening torque is reached, interrupts the flow of force between the output shaft and the ring-shaped screwing tool.
Implementation Method 2
The spring force which determines the torque of the friction clutch is directed toward the second clutch element.
Data Source
AI summary
The invention relates to a screwing tool that comprises a drive arranged in a housing and an output shaft connected to said drive, a screwdriver point being arranged at the front face of the output shaft. The aim of the invention is to provide a screwing tool with which different connecting elements, in particular actuating and clamping elements consisting of a screwable sleeve and an inner screw can be screwed with only a single screwing tool. In order to achieve this aim, the screwing tool comprises a receiving part (500) which surrounds the output shaft and is displaceably guided in the direction of the axis (202) of the output shaft (200) against the force of a return element (505). Furthermore, an annular screwing tool (400), which surrounds the output shaft (200) and the screwdriver point (201), is rotatably mounted on the receiving part (500) for detecting the drive contours (305) of the peripheral surface (304) of a connecting element (303), at least one shiftable clutch (600) being arranged between the rotatably mounted annular screwing tool (400) and the output shaft (200).