Chain Pin Removal Tool With Sliding Pressing Device
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Solution Overview
Problem
Existing tools for driving out chain bolts from chain links are bulky, difficult to transport, and often cannot process chain designs with narrow gaps between the outer taps, limiting their usability for cyclists.
Innovation Solution
A tool with a handle body and a printing device that includes a guide device allowing the printing device to move between two positions, enabling precise alignment and easy handling of chain links, even those with narrow designs, while allowing for separate storage and transport of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional chain pin removal tools are used, then chain links can be separated, but the tools are bulky and difficult to transport
Solution Approach 1:
The tool is divided into two main segments: a handle body and a pressing device. The pressing device can be detached from the handle body, allowing the user to carry only the lightweight handle body during cycling and attach the pressing device only when needed for chain repair.
Solution Approach 2:
The handle body serves multiple functions: it acts as a handle for the pressing device, provides positioning elements for chain link alignment, and includes a guide device for the pressing device. This multi-functionality reduces the need for separate components.
2Ease of operation
If traditional chain pin removal tools are used, then chain links can be separated, but the tools require large packing volume
Solution Approach 1:
By segmenting the tool into a handle body and a pressing device, the overall packing volume is reduced. The pressing device with its protrusions can be stored in a compact manner when not in use, and the handle body provides a compact base structure.
Solution Approach 2:
The pressing device can be attached to or nested with the handle body, allowing both components to occupy minimal space when stored together. The protrusions of the pressing device fit into corresponding recesses in the handle body.
3Measurement precision
If comb-like positioning elements are used, then chain links can be positioned, but they cannot engage with narrow-design chains
Solution Approach 1:
The positioning element features a V-shaped recess with specific geometric dimensions designed to match the pitch and width of standard chain links. This localized geometric feature provides precise positioning while maintaining compatibility with various chain designs including narrow ones.
Solution Approach 2:
The V-shaped recess geometry is optimized to accommodate different chain link dimensions. The angle and depth of the V-shaped recess can be adjusted to fit both standard and narrow chain designs, providing adaptability across different chain types.
4Weight of moving object
If miniaturized tools are used, then space and weight are reduced, but alignment precision and driving force are compromised
Solution Approach 1:
The guide device acts as an intermediary between the handle body and the pressing device. It ensures precise alignment of the pressing device with the chain pin through guide surfaces and geometric constraints, while the handle body provides sufficient leverage for applying driving force.
Solution Approach 2:
The V-shaped recess in the positioning element replicates the geometric characteristics of the chain link pitch and dimensions. This geometric copying ensures that the chain link is positioned with high precision relative to the pressing device, maintaining alignment accuracy despite the tool's compact size.
Data Source
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AI summary
The invention relates to a tool for driving a chain pin out of a chain link, comprising a handle body (10) which extends along a longitudinal axis (A) and has a positioning element (11) at a first end along the longitudinal axis (A), and a pressing-out device (20) with an upper (21) and a lower (22) projection, which in each case delimit an intermediate element (23) connecting the two projections (21, 22), wherein through bores (24, 25) coaxial with one another are provided in the two projections (21, 22) and a driving screw (30) with a press ram is screwed into the upper projection (21) at its end oriented towards the lower projection (22). This tool is intended to have good manual applicability, even for chains of different types, while at the same time having very small dimensions and being easy to transport, and in particular to enable machining of very narrowly constructed chain types. According to the invention, this is achieved by the fact that the handle body (10) has, at the first end along the longitudinal axis (A), a guide device (14) extending the handle body (10), in which guide device the pressing-out device (20) is mounted so as to be movable along the longitudinal axis (A) of the handle body (10) between a first position in which the positioning element (11) and the intermediate element (23) of the pressing-out device (20) form a chain space (40) for positioning the chain link (50), and a second position in which the pressing-out device (20) is spaced from the positioning element (11).