Insulation Dowel Setting Tool with Coaxial Drive and Auto-Clutch
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Solution Overview
Problem
Existing setting tools for insulating material dowels either introduce force eccentrically, leading to twisting or damage, or require manual pressure to release the coupling, resulting in uneven setting depths of the anchors.
Innovation Solution
A setting tool with a stop plate on the second drive shaft, adjustable via a positioning device, ensures central force application and automatic clutch release for consistent setting depth, preventing twisting and ensuring even anchoring without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a resiliently mounted driver pin is used to transmit torque from the first drive shaft to the insulating material holder, then the setting tool can operate without prior hole creation, but the force is introduced eccentrically leading to twisting of the insulation support plate or even damage to the insulation support
Solution Approach 1:
The patent introduces a second drive shaft as an intermediary component between the first drive shaft and the insulating material holder. The second drive shaft is arranged coaxially to the first drive shaft and transmits torque centrally to the insulating material holder, eliminating the eccentric force application that causes twisting. This intermediary shaft system allows the setting tool to operate without prior hole creation while preventing damage to the insulation support.
2Ease of operation
If manual pressure is applied to release the clutch between the first and second drive shafts, then the coupling can be released to drive only the first drive shaft, but an evenly deep setting of several insulating material anchors is not guaranteed
Solution Approach 1:
The patent implements a self-service mechanism where the clutch automatically releases when the insulating material holder reaches the desired setting depth. The clutch is designed to disengage automatically under the action of the setting force, eliminating the need for manual pressure application. This automatic release mechanism ensures that all insulating material anchors are set to the same depth consistently, as the clutch releases at the precise moment when the setting depth is achieved.
3Power
If the clutch is provided at a portion of the second drive shaft spaced from the first end, then torque can be transmitted from the first drive shaft to the second drive shaft, but the coupling must be released by manual pressure resulting in uneven setting depths
Solution Approach 1:
The clutch is positioned on the second drive shaft at a location that allows automatic release during the setting process. The clutch is designed to disengage automatically when the insulating material holder reaches the desired depth, without requiring manual pressure. This automatic release mechanism ensures consistent setting depth across multiple anchors while maintaining effective torque transmission during the setting process.
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 ensures even and correct deep setting of insulating material dowels with central force application, preventing twisting and ensuring consistent anchoring depths without manual pressure, facilitating easy and precise installation.
Implementation Method 1
The coupling comprises an elastic ring interacting with a radially circumferential first groove on the first drive shaft and a polygonal socket which interacts with a polygonal thickening on the first drive shaft to transmit torque from the first drive shaft to the second drive shaft
Implementation Method 2
A stop plate is mounted on the second drive shaft, whose axial distance from the first end of the second drive shaft can be preset via a positioning device
Implementation Method 3
The stop plate, which at least partially projects beyond the radial projection of the second drive shaft, is fixed axially to the second drive shaft after the corresponding axial displacement, which determines the setting depth of the insulating material dowel
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
The tool (21) has a drive shaft (22) with a stem, which extends along a longitudinal axis (31), and another drive shaft (32), which is co-axial to the former drive shaft. A coupling unit (38) transfers torque from the former drive shaft to the latter drive shaft, and is detachable by axial pressure, where the coupling unit is arranged in an area, which is at a distance to an end of the latter drive shaft. A stop plate (41) is supported at the latter drive shaft, and a positioning device (46) pre-adjusts the axial distance of the stop plate to another end of the latter drive shaft.