Angled Bolt Locking Cylinder for E-Bike Battery Compartment
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Solution Overview
Problem
The challenge is to design a lockable storage compartment, particularly for electric bicycles, that accommodates a locking mechanism with a locking cylinder while minimizing space usage and avoiding protrusions that could harm users.
Innovation Solution
The solution involves a locking cylinder with a bolt that is angled towards the front, allowing it to extend radially and axially within the compartment, thus requiring minimal installation space and ensuring the bolt can engage securely without protruding excessively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional locking cylinder with a radially extending bolt is used, then the locking mechanism provides secure locking, but the locking cylinder protrudes excessively beyond the installation area
Solution Approach 1:
The bolt is redesigned to extend at an angle (e.g., 45 degrees) relative to the radial direction, combining radial and axial components. This angular orientation allows the bolt to achieve the necessary radial locking depth while reducing the axial projection of the locking cylinder, resolving the contradiction between locking security and compact dimensions.
2Reliability
If the locking cylinder is designed with sufficient axial length for proper bolt engagement, then secure locking is achieved, but the available installation space is exceeded
Solution Approach 1:
By orienting the bolt at an angle rather than purely radially, the effective locking engagement is achieved within a shorter axial length. The angled configuration allows the bolt to traverse the necessary radial distance for secure engagement while occupying less axial space, thus fitting within constrained installation volumes.
Solution Approach 2:
The angled bolt design allows the locking mechanism to be nested more efficiently within the available space. The bolt path is optimized to utilize the three-dimensional installation space more effectively, reducing the overall envelope dimensions required for the locking cylinder.
3Reliability
If the locking cylinder protrudes beyond the installation area to accommodate the bolt movement, then the bolt can engage properly, but user safety is compromised due to injury risk
Solution Approach 1:
The angled bolt configuration reduces the axial projection of the locking cylinder, keeping the external surfaces flush or recessed relative to the installation area. This eliminates protruding components that could injure users while maintaining adequate bolt engagement through the angled path.
4Reliability
If the bolt extends radially to engage behind the wall section, then secure locking is achieved, but the installation area requires excessive radial extension
Solution Approach 1:
The bolt is oriented at an angle combining radial and axial components, allowing it to reach the wall section for engagement while utilizing axial space rather than requiring excessive radial extension. This angular orientation optimizes the use of available three-dimensional installation space.
Data Source
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AI summary
A lock cylinder for locking the lid of a storage compartment, in particular the battery compartment of an e-bike, comprises a cylinder housing, a rotor, and a bolt. The rotor is rotatably mounted in the cylinder housing about a cylinder axis and has a drive section at the rear of the lock cylinder. The bolt is fixedly mounted to the drive section of the rotor and projects radially beyond the cylinder housing with respect to the cylinder axis. The bolt is angled from the drive section of the rotor towards the front of the lock cylinder.