Gear Device Lubricant Worked Penetration Stability
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Solution Overview
Problem
Existing gear devices in robots, such as wave gear devices, are prone to early burning and wear due to inadequate lubrication, leading to reduced durability and increased maintenance needs.
Innovation Solution
A gear device with a lubricant applied to contact portions, where the change rate of worked penetration caused by a worked stability test is within a range of −16% to +16%, optimizing lubrication performance and reducing wear and burning over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lubricants are used in wave gear devices, then initial lubrication performance is adequate, but burning and wear occur early due to inadequate long-term lubrication stability
Solution Approach 1:
The invention changes the chemical composition parameters of the lubricant by specifying a particular viscosity index improver (polyalphaolefin copolymer with specific molecular weight and structure) and additive package to achieve stable lubrication performance over extended periods, preventing burning and wear in wave gear devices
Solution Approach 2:
The invention creates a composite lubricant formulation combining base oil, specific viscosity index improver (polyalphaolefin copolymer), and multiple additives (anti-wear agents, extreme pressure agents, antioxidants) to achieve synergistic effects that prevent both early wear and long-term burning
2Duration of action of stationary object
If the lubricant's worked penetration changes significantly after stability testing, then initial lubrication performance varies, but long-term durability cannot be guaranteed
Solution Approach 1:
The invention optimizes the worked penetration parameter by carefully selecting the viscosity index improver characteristics (molecular weight 10,000-100,000, specific structure) and additive concentrations to ensure the lubricant maintains consistent lubrication performance throughout its service life, with worked penetration change rate after stability testing within acceptable ranges
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 optimized lubricant change rate significantly reduces long-term damage, maintains excellent lubrication performance throughout the gear device's lifespan, and ensures a higher maximum non-burning load and fusion load, thereby extending the operational life of the robot.
Implementation Method 1
a lubricant, which is disposed on the contact portion and of which a change rate of worked penetration caused by a worked stability test is within a range of −16% to +16% inclusive
Data Source
AI summary
A robot includes a first member, a second member that is provided so as to be movable around the first member, and a gear device that transmits driving force from one of the first member and the second member to the other. The gear device includes a contact portion where two surfaces come into contact with each other and a lubricant, which is disposed on the contact portion and of which a change rate of worked penetration caused by a worked stability test is within a range of −16% to +16% inclusive.