Eccentric Reducer Carrier Assembly for Pin Retention
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Solution Overview
Problem
Existing eccentric reducers face challenges in securely preventing pin members from escaping from pin holes, as deformation methods to prevent escape are difficult to control and may be insufficient.
Innovation Solution
The use of a bolt and washer fastening section, where the washer acts as a cover portion to prevent pin members from exiting through-holes, ensuring secure fixation of carrier members without the need for additional cover members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pin members are merely pressed into pin holes to fix carrier members, then the structure is simple, but the pin members can escape from the holes
Solution Approach 1:
The invention merges the fastening function and the retention function into a single integrated structure. The fastening member (bolt) not only secures the carrier members together but also incorporates a retention portion that prevents pin member escape. This eliminates the need for separate retention components while maintaining structural simplicity.
Solution Approach 2:
The fastening member is designed to perform multiple functions simultaneously: it acts as both a fastening element (securing carrier members) and a retention element (preventing pin member escape). The retention portion of the fastening member creates an abutment surface that stops pin members from escaping, making the fastening member a multi-functional component.
2Device complexity
If deformation method is used to prevent pin member escape, then no additional components are needed, but the deformation amount is difficult to control and may be insufficient
Solution Approach 1:
The invention combines the fastening and retention functions into one integrated fastening member, eliminating the need for separate retention components. This maintains device simplicity while providing reliable pin member retention through the abutment surface created by the retention portion.
Solution Approach 2:
The invention changes the approach from controlling deformation parameters to using geometric parameters of the fastening member. The retention portion is designed with specific dimensions and positioning that create an effective abutment surface, transforming the problem from controlling deformation amount to designing a geometric retention structure.
3Reliability
If separate cover members are added to prevent pin member escape, then pin retention is improved, but device complexity increases
Solution Approach 1:
The invention merges the fastening function and the retention function into a single integrated structure. The fastening member (bolt) not only secures the carrier members together but also incorporates a retention portion that prevents pin member escape. This eliminates the need for separate retention components while maintaining structural simplicity.
Solution Approach 2:
The fastening member is designed to perform multiple functions simultaneously: it acts as both a fastening element (securing carrier members) and a retention element (preventing pin member escape). The retention portion of the fastening member creates an abutment surface that stops pin members from escaping, making the fastening member a multi-functional component.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
There is provided an eccentric reducer having a carrier which can securely prevent pin members, which have been pressed into pin holes to fix a first carrier member and a second carrier member to each other, from escaping from the pin holes. The carrier 30 includes a first carrier member 31, a second carrier member 32, a pin member 41 which has been pressed into a bottomed hole 36b formed in the first carrier member 31 and a through-hole 38b formed in the second carrier member 32 such that it straddles the two holes, and a fastening section 40 including a screw body 43 which has been threaded into a screw hole 36a formed in the first carrier member 31 and a screw hole 38a formed in the second carrier member 32 such that it straddles the two holes. A portion 45 of the fastening section 40 is provided as a cover portion that covers at least part of the opening 38c of the through-hole 38b into which the pin member 41 has been inserted.