Motor Speed Reduction Mechanism Latching Claw Protection
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Solution Overview
Problem
Conventional motor speed reduction mechanisms with exposed latching claws are prone to breakage and premature detachment due to external impacts after assembly, compromising maintenance and reliability.
Innovation Solution
The motor speed reduction mechanism incorporates a latching claw design with a wall portion covering the side and tip surfaces of the latching claw, and an engaging surface in the diametrical direction, which prevents breakage and detachment by shielding the latching claw from external objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the latching claw is disposed on the outside in the diametrical direction than the outer wall surface of the worm wheel housing portion to facilitate assembly and disassembly, then the ease of operation is improved, but the reliability deteriorates due to exposure to external impacts causing breakage or detachment
Solution Approach 1:
The latching claw is nested within the space formed by the worm wheel housing portion and the bottom cover. The claw extends into the interior space of the housing rather than protruding outward, allowing it to be accessible for assembly/disassembly while protected from external impacts by the housing structure itself.
Solution Approach 2:
The groove formed in the outer wall surface of the worm wheel housing portion acts as an intermediary structure. It receives and secures the latching claw, providing a protected engagement mechanism that prevents direct exposure of the claw to external impacts while maintaining assembly functionality.
2Ease of repair
If the latching claw is exposed on the outside to allow for easy maintenance and reassembly, then the ease of repair is improved, but the object-affected harmful factors worsen due to susceptibility to external objects causing breakage
Solution Approach 1:
The latching claw is positioned within the interior space of the worm wheel housing portion, nested between the housing and bottom cover. This nesting arrangement protects the claw from external objects while maintaining accessibility for maintenance operations through the housing opening.
Solution Approach 2:
The groove in the housing wall serves as an intermediary structure that secures the latching claw in a protected position. The groove geometry provides engagement surfaces that hold the claw securely while allowing controlled access for maintenance without direct exposure to external harmful factors.
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
This design enhances the durability and maintainability of the motor speed reduction mechanism by protecting the latching claw from damage and ensuring reliable engagement, facilitating easy assembly and disassembly.
Implementation Method 1
a speed reduction mechanism composed of a worm, which is formed on a rotation shaft of the motor main body, and a worm wheel meshing with the worm
Implementation Method 2
the worm wheel housing portion and the bottom cover are assembled by a plurality of latching structures latched by claws
Data Source
AI summary
A worm wheel housing portion 19 of a gear case 16 has a bottomed cylindrical shape having a bottom wall portion 19a and a cylindrical wall portion 19b, and a bottom cover 35 is assembled at an opening portion of the worm wheel housing portion 19 so as to seal the opening portion. Among a plurality of latching structures for assembling them, as a latching structure other than those on a worm housing portion 17 side, a groove 44 is formed to a latching claw 38b extending along the cylindrical wall portion 19b from an outer circumferential portion of the bottom cover 35, and a projecting piece 47 engaged with the groove 44 is provided on an outer wall surface of the cylindrical wall portion 19. Wall portions 53 and 54 covering side surfaces a and tip face of the latching claw 38b are provided on the outer wall surface of the cylindrical wall portion 19b, so that breakage of the latching claw 38b or release of the engagement of the latching claw 38 to be caused, for example, when an object hits the latching claw 38b can be prevented.