Encoder Disc Shaft Clamp With Adjustable Clamping Path
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Solution Overview
Problem
Conventional methods for securing a motor shaft to a rotatable encoder disc often result in relative rotation, leading to inaccurate rotational information due to poor coupling, which is detrimental in applications requiring exceptional accuracy.
Innovation Solution
An encoder assembly with a clamp that is securely fixed to both the encoder disc and the motor shaft, featuring an arcuately extending body with an adjustment mechanism to modify the clamping path and ensure synchronous rotation, and an axially raised boss to minimize contact and prevent slipping during assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to secure the motor shaft to the encoder disc, then the assembly is simple to manufacture, but relative rotation occurs leading to inaccurate rotational information
Solution Approach 1:
The clamp incorporates an adjustment mechanism that allows dynamic modification of the clamping path by shifting the arcuately spaced apart ends relative to one another. This enables the clamp to adapt to slight variations in shaft diameter while maintaining precise synchronization, resolving the contradiction between measurement precision and device complexity by providing adjustability without excessive structural complexity
Solution Approach 2:
The cutout in the clamp body facilitates bending of the body to modify the arcuate extent of the gap and the clamping path. This parameter change allows the clamp to conform precisely to the shaft surface, ensuring accurate rotational information transmission while keeping the overall structure relatively simple
2Reliability
If the clamp is tightly secured to the encoder disc, then synchronous rotation is achieved, but the encoder disc may be damaged during assembly or operation
Solution Approach 1:
The adjustment mechanism allows the clamp to be positioned and adjusted before final tightening. The cutout facilitates preliminary bending of the clamp body to achieve proper alignment, ensuring that when the clamp is fully secured, synchronous rotation is achieved without excessive force that could damage the encoder disc
Solution Approach 2:
The flexible clamp design with the cutout allows the structure to absorb and distribute mounting stresses. This beforehand cushioning effect prevents stress concentration that could damage the encoder disc while maintaining reliable synchronous rotation under operational vibrations
3Adaptability or versatility
If the clamp structure is made flexible to accommodate shaft variations, then adaptability improves, but structural strength may be compromised
Solution Approach 1:
The cutout is strategically positioned in the clamp body to provide flexibility only in the regions needed for adaptation to shaft variations. The rest of the clamp structure maintains full strength, resolving the contradiction by applying flexibility locally where needed while preserving overall structural integrity
Solution Approach 2:
The clamp body is segmented by the cutout, which allows independent movement and bending of different portions of the clamp. This segmentation enables the clamp to adapt to shaft size variations while each segment maintains sufficient strength, preventing overall structural compromise
Data Source
AI summary
An encoder includes a rotatable encoder disc. A clamp is fixed to the encoder disc to rotate therewith. The clamp includes an arcuately extending body presenting a radially inner face and arcuately spaced apart ends defining a gap therebetween. The inner face extends along a clamping path and engages a rotating component to secure the clamp to the rotating component to rotate therewith. The clamp includes an adjustment mechanism for modifying an arcuate extent of the gap by shifting the ends relative to one another and, in turn, modifying the clamping path. The body defines a radially extending cutout facilitating bending of the body in association with expansion or contraction of the gap and modification of the clamping path. The clamp includes a raised boss extending from a front face thereof. The boss presents a contact face spaced axially from the front face and fixedly engaging the encoder disc.