Encoder Reading Head Adjustment in Modular Robot Joints
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Solution Overview
Problem
Existing modular robot joints face challenges in adjusting the precise distance between encoder reading heads and magnetic rings, leading to manufacturing cost increases and difficulties in assembly and debugging due to rigid dimensional tolerances.
Innovation Solution
A modular robot joint design that incorporates a reading head position adjustment mechanism, allowing for adjustable axial distance between the reading head and the magnetic ring, ensuring accurate encoder operation and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between encoder reading head and magnetic ring is ensured by controlling tolerances of all corresponding parts, then measurement precision is improved, but manufacturing cost increases and device complexity increases
Solution Approach 1:
The patent divides the encoder assembly into separate components: the reading head, the magnetic ring, and an adjustment mechanism. This segmentation allows the reading head to be independently positioned and adjusted relative to the magnetic ring, rather than requiring precise control of all parts in a fixed assembly. The adjustment mechanism separates the positioning function from the other components, enabling post-assembly calibration to achieve accurate detection without stringent manufacturing tolerances across all parts.
Solution Approach 2:
The patent introduces an adjustable mechanism that allows the reading head position to be dynamically modified after assembly. This dynamic adjustment capability replaces the static, tolerance-dependent design with a flexible system where the distance between the reading head and magnetic ring can be calibrated to the optimal value during assembly or maintenance, thereby achieving high measurement precision without requiring expensive tight tolerances on all components.
2Measurement precision
If the distance between encoder reading head and magnetic ring is ensured by controlling tolerances of all corresponding parts, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the positioning function from the overall assembly and places it in a dedicated adjustment mechanism. By taking out the reading head mounting structure and making it independently adjustable, the patent eliminates the need for a complex dimensional chain involving multiple precision-machined interfaces. The adjustment mechanism serves as a standalone subsystem that simplifies the overall dimensional control by concentrating the positioning requirement in one location rather than distributing it across multiple components.
3Measurement precision
If rigid dimensional tolerances are applied to ensure encoder reading head position, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent transforms the static, fixed-position reading head design into a dynamic, adjustable design. The adjustment mechanism allows operators to modify the reading head position during assembly and debugging, converting a complex tolerance-control problem into a simple calibration task. This dynamic capability enables operators to achieve accurate encoder readings through straightforward adjustment procedures rather than requiring complex assembly processes with tight tolerance control.
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
The adjustable mechanism ensures accurate encoder operation, reduces processing costs, and simplifies the assembly and debugging process by allowing flexible adjustment of the reading head position.
Implementation Method 1
the encoder includes a magnetic ring and a reading head, and the magnetic ring is fixed to a motor shaft of the motor or the hollow shaft
Data Source
AI summary
The invention discloses a modular robot joint, encoder reading head position adjustment mechanism and method for adjusting the position of an encoder reading head, the encoder reading head position adjustment mechanism is disposed on one side of the encoder reading head bracket, and includes a lower support and a upper support, the lower support and the upper support are connected to each other and positioned by a positioning connecting member, the upper support is pressed tightly against the lower support by a pressing connecting member, the encoder reading head is fixed to the upper surface of the upper support and is opposite to the encoder magnetic ring, the encoder magnetic ring is fixed to the motor shaft or the hollow shaft, the distance between the lower support and the upper support can be adjusted by adjusting the pressing connecting member and positioning connecting member, so that the axial distance between the reading head and the magnetic ring can be adjusted to a predetermined value, the processing accuracy of related parts on the dimensional chain is reasonably reduced, and the processing cost is reduced too, and the relative distance between the reading head and the magnetic ring is easy to adjust when the robot joint is assembled and debugged, thus achieving good technical results.