Gear Backlash Adjusting Mechanism for Robot Arm Precision
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Solution Overview
Problem
Industrial robots experience reduced precision and increased noise due to gear backlash in their transmission mechanisms, which is exacerbated by wear and tear, affecting their operational range and longevity.
Innovation Solution
A gear backlash adjusting mechanism is integrated into the robot arm assembly, utilizing a combination of elastic gears and adjustable bearing boxes to eliminate backlash by deforming elastic members and tightening gear meshes, allowing for precise adjustment and elimination of backlash between gears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gear transmission mechanism is used to transmit motor movement, then robot arm rotation is achieved, but gear backlash increases over time due to abrasion, reducing precision and lifespan
Solution Approach 1:
The bearing box is designed to be adjustable rather than fixed, allowing the gear meshing state to be dynamically optimized. The bearing box can be repositioned along the gear axis to adjust the meshing gap between gears, compensating for wear and maintaining precision throughout the gear transmission mechanism's operational life
Solution Approach 2:
The invention changes the parameter of gear meshing gap by adjusting the bearing box position. This allows the system to adapt to different wear stages, maintaining optimal meshing conditions and preventing backlash from degrading precision and reliability over time
2Productivity
If gear transmission mechanism operates continuously, then robot productivity is maintained, but gear abrasion increases, causing backlash and precision deterioration
Solution Approach 1:
The adjustable bearing box mechanism enables operators to perform maintenance and precision adjustment themselves without requiring specialized equipment or extensive disassembly. The bearing box can be easily repositioned to compensate for wear, allowing the system to self-maintain its precision characteristics throughout its service life
Solution Approach 2:
The system transitions from a static gear meshing configuration to a dynamic one where the bearing box position can be adjusted based on operational needs and wear conditions, enabling continuous productivity while maintaining precision
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 mechanism effectively reduces gear backlash, enhancing the precision and lifespan of the gear transmission mechanism, leading to improved operational performance and reduced noise in industrial robots.
Implementation Method 1
an elastic member 525 mounted between the outer ring 521 and the inner ring 523. The elastic member 525 includes a portion which in section resembles a concertina (bent portion 5251)... the first gear 53 is imposed on the elastic member 525 so that the elastic member 525 is elastically deformed
Data Source
AI summary
A gear backlash adjusting mechanism includes a base, a first gear, a first elastic gear meshing with the first gear, a bearing sleeved on the first gear, and a bearing box over the bearing, and mounted on the base. The first elastic gear includes an outer ring, an inner ring, and an elastic member mounted between the outer ring and the inner ring. The position of the bearing box relative to the base can be adjusted, to push the first elastic gear via the first gear. The elastic member is deformed and provides elastic force to push the first elastic gear to tightly mesh with the first gear.