Power Tool Stand Coupling with Eccentric Hook Locking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power tool stands for core drilling in concrete and brickwork require large and complex tool coupling members that are difficult to manufacture and do not provide reliable, wear-free locking mechanisms, especially during high torque applications.
Innovation Solution
A power tool stand with a guide carriage and a tool coupling featuring a carriage coupling member with two hooks and a tool coupling member having free-lying, circumferentially arranged bolts that can be hung behind the hooks, along with an eccentric mechanism for automatic locking, allowing for a smaller design and simplified manufacturing using standard bolts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional tool coupling member with an exposed projecting nose is used, then the power tool can be securely mounted on the carriage coupling member, but the tool coupling member becomes large and difficult to manufacture
Solution Approach 1:
The patent extracts the protruding nose feature from the tool coupling member and replaces it with two separate hooks that engage with corresponding engagement surfaces on the carriage coupling member. This separation allows the tool coupling member to be smaller and simpler to manufacture while maintaining secure mounting functionality.
Solution Approach 2:
The tool coupling member is segmented into two distinct functional elements: two hooks instead of a single protruding nose structure. This segmentation allows for simplified manufacturing using standard bolts and reduces the overall size of the component while maintaining the necessary secure attachment capability.
2Reliability
If a complex tool coupling member design is used to ensure reliable mounting, then the power tool can be securely attached, but the manufacturing process becomes more difficult
Solution Approach 1:
The patent employs standard bolts as the tool coupling member, which are inexpensive, easily manufacturable components. These bolts are designed to be simple and straightforward, avoiding complex manufacturing processes while providing sufficient reliability for the application through their standardization and ease of replacement.
Solution Approach 2:
By removing the complex protruding nose structure and replacing it with simple hooks that engage with the carriage coupling member, the manufacturing complexity is significantly reduced. The tool coupling member can be manufactured using standard bolt production processes, making it easier and more cost-effective to produce.
3Device complexity
If the tool coupling member is made smaller, then manufacturing is easier and the design is more compact, but the locking reliability may be compromised
Solution Approach 1:
The patent introduces a dynamic locking mechanism where the two hooks can move relative to each other along the clamping surface during the locking process. This dynamic interaction, combined with the eccentric mechanism, ensures reliable locking without requiring a large tool coupling member size.
Solution Approach 2:
The locking mechanism combines multiple functional elements (hooks, clamping surfaces, eccentric mechanism, and lever) working together as a composite system. This composite approach allows the smaller tool coupling member to achieve reliable locking through the synergistic interaction of its components rather than relying on a single large structural element.
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 solution provides a compact, reliable, and easy-to-manufacture tool coupling system that ensures secure attachment of power tools with reduced wear and allows for efficient water drainage, while maintaining high locking forces without damaging components.
Implementation Method 1
The first hook is displaceable by an eccentric mechanism, whereby locking is effected automatically.
Implementation Method 2
The eccentric mechanism is formed of a cylindrical sleeve and an eccentric bolt displaceable therein and having, advantageously, a radial helical contact surface which provides for application thereto of high locking forces which do not cause any significant wear.
Data Source
AI summary
A power tool stand includes a guide carriage (4), and a tool coupling (1) for a portable power tool (3) and including a carriage coupling member (1a) provided on the guide carriage (4), having a clamping surface (5a), two hooks (7a, 7b) spaced from each other along the clamping surface (5a) with at least the first hook (7a) being displaceable along the clamping surface (1a), and connectable with a tool coupling member (1b) for the power tool (3) and having a clamping surface (5b the tool coupling member (1b) having two free-lying, arranged at least partially circumferentially, bolts (6) which can be hanged behind the two associated hooks (7a, 7b) of the carriage coupling member (1a).