Grease composition for constant velocity joint
A technology of grease composition and constant velocity universal joint, which is applied in the direction of lubricating composition, petroleum industry, base materials, etc., can solve problems such as poor lubrication, failure, and poor machine operation, and achieve the effect of improving lubricity
Pending Publication Date: 2021-10-01
HONDA MOTOR CO LTD +1
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Poor lubrication may lead to poor work and failure of the machine
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0081] The following examples illustrate the present invention. The present invention is not limited to the following embodiments. In addition, unless otherwise indicated, % represents mass %.
[0082]
[0083] For each example and each comparative example, a thickener, a base oil, and an additive were compounded according to the compounding ratio shown in Tables 1 to 4, and a grease composition for a test was prepared. The following evaluations were performed on these test grease compositions.
[0084] (1) base oil
[0085] Kinematic viscosity at 40°C is 175mm 2 / s mineral oil.
[0086] (2) thickener (raw material)
[0087] ·Diphenylmethane-4,4'-diisocyanate
[0088] ·Alicyclic amine (cyclohexylamine)
[0089] · Higher Alcohol (Stearyl Alcohol)
[0090] A urea-urethane compound was prepared by reacting an alicyclic amine, a higher alcohol, and a diisocyanate compound (methylene diisocyanate) at the ratios shown in Tables 1-4.
[0091] (3) Additives
[0092] Additi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Login to View More
Abstract
Provided is a grease composition for a constant velocity joint. The present invention addresses the problem of improving lubricity when a constant velocity joint reaches a high angle (high surface pressure). The grease composition for a constant velocity joint contains a mineral oil, a thickener, molybdenum dithiocarbamate, a potassium borate hydrate, and zinc dialkyldithiophosphate, and the molybdenum dithiocarbamate content is 1.2-8% by mass (inclusive) based on the total amount of the grease composition. The content of the zinc dialkyldithiophosphate is 0.3% by mass or more and 2.0% by mass or less based on the total amount of the grease composition, and the content of the potassium borate hydrate is 0.28% by mass or more and 1.9% by mass or less based on the total amount of the grease composition. The mass ratio of the molybdenum dithiocarbamate content to the potassium borate hydrate content is from 2 to 13 (inclusive), and the mass ratio of the zinc dialkyldithiophosphate content to the potassium borate hydrate content is from 0.5 to 3.6 (inclusive).
Description
technical field [0001] The present invention relates to a grease composition for constant velocity joints. Background technique [0002] A constant velocity joint (constant velocity joint) refers to a joint that smoothly transmits power without rotation fluctuation when the input shaft and output shaft rotate at any angle (working angle). Constant velocity joints are widely used in automobiles and various industrial machines. In automobiles, constant velocity joints are mainly used to connect transmission shafts and drive shafts to tires. [0003] Lubricant, preferably grease, is enclosed in the constant velocity joint for the purpose of reducing the coefficient of friction and the like. In recent years, in order to improve the performance of constant velocity joints, urea-based greases and urea-urethane-based greases containing various additives have been used. In addition, there is a grease for constant velocity joints that contains a borate alkali metal salt hydrate, a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/06C10N50/10
CPCC10M169/00C10M2219/068C10M2201/087C10M2223/045C10M2203/1006C10M2215/044C10M2207/021C10M2215/14C10M2219/044C10M2221/043C10N2050/10C10M2215/1026C10M2219/08C10N2030/06C10N2040/02C10M141/12C10M169/06C10N2010/04C10N2010/12C10N2010/02C10M115/04C10M115/08C10M125/26C10M135/18C10M137/10C10M2207/0206C10M2219/066C10M101/02
Inventor 草阶胜人铃木康夫松冈和弥泉徹菖蒲祐辅
Owner HONDA MOTOR CO LTD