Robot Timing Belt Restrictor Adjustment to Prevent Tooth Jumping
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Solution Overview
Problem
Existing robot designs face challenges in adjusting the interval between the restricting member and the timing belt, leading to issues with tooth jumping and reduced service life due to fixed positions, which affect the driving characteristics.
Innovation Solution
A power transmission mechanism with a rotating restricting member and a screw mechanism that allows adjustable separation distance between the restricting section and the belt, enabling precise adjustment to prevent tooth jumping and extend belt life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the restricting member is fixed at a predetermined interval from the timing belt, then tooth jumping is restricted, but the timing belt wears and service life decreases
Solution Approach 1:
The restricting member is made rotatable around the screw's center axis, transforming it from a static fixed-position component to a dynamic adjustable component. This allows the separation distance to be optimized - positioned close enough to restrict tooth jumping but far enough to prevent contact and wear during normal operation
Solution Approach 2:
The invention changes the separation distance parameter between the restricting member and timing belt from a fixed predetermined value to an adjustable value. By rotating the restricting member around the center axis, the separation distance can be precisely controlled to balance tooth jumping restriction with prevention of belt wear
2Duration of action of stationary object
If the interval between the restricting member and timing belt is increased, then timing belt wear is reduced, but tooth jumping cannot be restricted
Solution Approach 1:
The rotatable restricting member enables dynamic adjustment of the separation distance, allowing optimization between preventing belt wear (larger interval) and restricting tooth jumping (smaller interval). The system can be configured to the precise distance needed for each application
Solution Approach 2:
The adjustable design allows for feedback-based optimization where the separation distance can be tuned based on observed performance, ensuring both tooth jumping restriction and belt life protection are achieved
3Device complexity
If a fixed position restricting member is used, then device complexity is reduced, but driving characteristics cannot be optimized
Solution Approach 1:
Adding rotational capability to the restricting member introduces adjustability without significantly increasing overall device complexity. The screw mechanism provides a simple yet effective means to achieve precise positioning
Solution Approach 2:
The invention enables change of the separation distance parameter from fixed to variable, allowing optimization of driving characteristics for different applications while maintaining a relatively simple structural implementation through the screw and rotation mechanism
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 separation distance effectively restricts tooth jumping, improves driving characteristics, and extends the service life of the timing belt by allowing for optimal alignment and reduced wear.
Implementation Method 1
a screw having a center axis along the first axis and configured to fix the restricting member to the fixed member
Data Source
AI summary
A robot includes a power source and a power transmission mechanism configured to transmit an output of the power source. The power transmission mechanism includes a fixed member, a first pulley configured to rotate around a first axis with respect to the fixed member, a second pulley disposed to be separated from the first pulley and configured to rotate, with respect to the fixed member, around a second axis parallel to the first axis, a belt wound around the first pulley and the second pulley and configured to transmit the rotation of one of the first pulley and the second pulley to another, a restricting member including a restricting section disposed to be opposed to the belt with a gap in a portion where the first pulley and the belt mesh with each other, and a screw having a center axis along the first axis and configured to fix the restricting member to the fixed member. The restricting member rotates around the center axis to thereby change a separation distance between the restricting section and the belt in a plan view from a direction extending along the first axis.