Encoder Frame and Bracket Structure to Protect Rotating Plates
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Solution Overview
Problem
Conventional encoders face challenges in fine adjustment of the main body's position relative to the rotating plate, which can lead to contact and damage to the rotating plate during assembly.
Innovation Solution
The encoder design includes a bracket with recesses and a frame with protrusions that allow for fine adjustment of the optical module's position relative to the rotating plate, preventing contact and damage by maintaining a gap between the frame and the rotating plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fine adjustment of the main body position is performed to adjust the relative position of the detector with respect to the rotating plate, then the detection precision is improved, but the rotating plate may be deformed or damaged due to contact between the main body and the rotating plate
Solution Approach 1:
The patent introduces a buffer member as an intermediary element positioned between the main body and the rotating plate. This buffer member absorbs contact forces during fine adjustment operations, preventing direct transmission of damaging forces to the rotating plate while still allowing positional adjustment of the detector for improved detection precision.
Solution Approach 2:
The buffer member is pre-installed in the buffer chamber at a position that provides cushioning protection before any contact between the main body and rotating plate can occur. This beforehand cushioning arrangement ensures that during fine adjustment operations, any contact forces are absorbed by the buffer member, preventing deformation or damage to the rotating plate while enabling precise positioning.
2Object-affected harmful factors
If the main body is fixed rigidly to prevent any contact with the rotating plate, then damage to the rotating plate is prevented, but fine adjustment of the detector position becomes difficult
Solution Approach 1:
The patent divides the housing structure into separate components: a buffer chamber and a main body that can move relative to each other. The buffer member is positioned in the buffer chamber, allowing the main body to be adjusted independently without directly contacting the rotating plate. This segmentation enables fine adjustment operations while maintaining protection for the rotating plate.
Solution Approach 2:
The patent creates a dynamic system where the main body can move relative to the buffer chamber during fine adjustment operations. The buffer member provides a compliant interface that allows controlled movement and adjustment while preventing damaging contact. This dynamic arrangement enables ease of operation for positioning while still protecting the rotating plate from damage.
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 effectively suppresses damage to the rotating plate during assembly by ensuring a sufficient gap between the frame and the rotating plate, even during fine adjustments.
Implementation Method 1
a light receiving element that receives a light emitted from the light source and reflected by the rotating plate
Implementation Method 2
a light receiving element that receives a light emitted from the light source and transmitted through the rotating plate
Data Source
AI summary
Damage to a rotating plate is suppressed. Encoder (20) includes bracket (11), rotating plate (21) that rotates about a rotation axis, optical module (22) that faces rotating plate (21) and includes at least one of a light source and a light receiving element, substrate (23) to which optical module (22) is attached, and frame (24) that is fixed to bracket (11) and supports substrate (23). Bracket (11) has three or more recesses (11a) in a surface facing frame (24). Frame (24) has three or more protrusions (24a) each entering recess (11a) of bracket (11) with a gap therebetween. In the radial direction of rotating plate (21), the difference between inner dimension (D1) of frame (24) and outer dimension (D2) of rotating plate (21) is larger than the difference between inner dimension (D3) of recess (11a) and outer dimension (D4) of protrusion (24a).


