Fastening Element Feeding Device with Linear Rotary Guide
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Solution Overview
Problem
Existing fastening element feeding devices for power drive-in tools require high press-on force for starting the press-on process, are susceptible to jamming and soiling, and have complex kinematics that lead to mechanical failures.
Innovation Solution
A fastening element feeding device with a displacing member supported by a rotary axle and actuation members, guided by curved tracks on both components, which optimizes the displacement path and reduces the risk of jamming and soiling, featuring separate guides for the front and rear ends of the displacing member and ratchet mechanisms for controlled transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a curved guide is used to guide the actuation member, then the transportation mechanism can be compact, but it leads to jamming and soiling of the curved guide
Solution Approach 1:
The patent extracts the curved guide from the system and replaces it with a linear guide combined with a rotary mechanism. The actuation member moves linearly in a guideway and rotates a transportation wheel, separating the guiding function from the curved path requirement, thereby eliminating jamming and soiling issues while maintaining compactness through the rotary mechanism.
Solution Approach 2:
The patent replaces the curved mechanical guide with a linear guideway system combined with rotational motion. Instead of forcing the actuation member through a curved path, the system uses linear guidance with a rotary connection to achieve the same transportation function, reducing mechanical complexity and improving reliability.
2Ease of operation
If high press-on force is applied to start the press-on process, then the screw guide can be displaced into the holder, but it increases the effort needed by the user
Solution Approach 1:
The patent introduces a spring mechanism that dynamically assists the press-on operation. The spring is compressed during the pressing action and provides additional force to displace the screw guide into the holder, reducing the effort required from the user while maintaining the necessary displacement force.
Solution Approach 2:
The patent uses a spring as an intermediary element between the user's pressing action and the screw guide displacement. The spring stores and releases energy to amplify the user's input force, making the operation easier while still achieving the required displacement of the screw guide into the holder.
3Productivity
If a complex transportation mechanism is used to feed fastening elements, then the feeding can be controlled, but it increases susceptibility to mechanical failures
Solution Approach 1:
The patent segments the transportation mechanism into distinct functional components: a linear guideway for precise positioning, a rotary mechanism for wheel rotation, and a simple ratchet system for controlled advancement. This segmentation simplifies each component while maintaining overall control, reducing the complexity that leads to mechanical failures.
Solution Approach 2:
The patent replaces complex mechanical linkages with a simpler system combining linear guidance and rotational motion controlled by a ratchet mechanism. This substitution reduces the number of moving parts and potential failure points while maintaining controlled feeding of fastening elements through the magazine strip.
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 simplifies the construction, reduces the necessary press-on force, enhances reliability, and minimizes the risk of mechanical failures by optimizing the displacement path and using ratchet mechanisms for controlled transportation, ensuring efficient and reliable feeding of fastening elements.
Implementation Method 1
a spring member (42) arranged between the two control pins (36) and having a first end connected to the two control pins (36) and a second end connected to the displacing member (31)
Implementation Method 2
ratchet mechanisms for controlled transportation
Data Source
AI summary
A fastening element feeding device for a power drive-in tool includes a transportation device (30) having a transportation wheel (32) for a magazine strip (50), at least one actuation member (35) displaceable in a control track (16) in a first component (11) for effecting a relative displacement between the first component (11) and the second component (21), which results in a transportation displacement of the transportation wheel (32); a displacing member (31) having one end region (39) which is adjacent to the head (22), supporting the rotary axle (D) together with the transportation wheel (32), and having another of its end regions (38) supporting the at least one actuation member (35); and a guide arrangement that provides for displacement of the displacing member (31) over the second component (21).