Spring Box Cover Locking Structure for Compact Turning Gear
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Solution Overview
Problem
Existing spring housings require significant installation space due to the need for screws and screw bosses, which complicates assembly and increases the overall size of the device.
Innovation Solution
A spring housing design that secures the cover plate against movement relative to the base body using connecting means formed exclusively by the base body and cover plate, eliminating the need for screws and screw bosses, allowing for a more compact and space-saving structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws and screw bosses are used to secure the cover plate, then the connection reliability is improved, but the installation space and device complexity increase
Solution Approach 1:
The patent merges the cover plate and base body into a single integrated component, eliminating the need for separate fastening elements like screws and screw bosses. The cover plate is designed with integrated mounting features that directly engage with the base body, combining what were previously separate components into one unified structure, thereby reducing installation space while maintaining connection reliability
Solution Approach 2:
The patent extracts and eliminates the unnecessary fastening components (screws and screw bosses) from the design. By removing these extraneous elements and retaining only the essential structural components, the design achieves space savings without compromising the fundamental connection function between the cover plate and base body
2Strength
If screws and screw bosses are used to secure the cover plate, then the connection strength is improved, but the device complexity and material usage increase
Solution Approach 1:
The patent combines the fastening function into the integrated structure of the cover plate and base body. The mounting features are built-in to the design itself, eliminating the need for separate fastening mechanisms. This integration maintains connection strength while significantly reducing device complexity and the number of parts required
Solution Approach 2:
The integrated design allows the cover plate and base body to self-secure through their inherent structural features. The mounting features are designed to automatically engage and secure the components together without requiring external fastening elements or complex assembly procedures, thereby reducing both complexity and material usage
3Reliability
If screws and screw bosses are used to secure the cover plate, then the connection reliability is improved, but the manufacturing time and assembly time increase
Solution Approach 1:
The patent incorporates the fastening features directly into the molded structure of the cover plate and base body during manufacturing. The mounting features are pre-formed as integral parts of the components, eliminating the need for post-assembly fastening operations. This preliminary integration of fastening functionality significantly reduces assembly time while maintaining connection reliability
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A spring housing (1) for a starting device for starting an internal combustion engine comprises a base body (4) with a spring receiving chamber (5) and a cover plate (6) for at least partially covering the spring receiving chamber (5). The cover plate (6) and the base body (4) are connectable to each other via at least one connecting element (10), wherein the connecting element (10) secures the cover plate (6) against movement relative to the base body (4) in the direction of a central axis (50) of the spring housing (1). The at least one connecting element (10) consists of a first part on the base body (4) and a second part on the cover plate (6).