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504 results about "Constant-velocity joint" patented technology

Constant-velocity joints (also known as homokinetic or CV joints) allow a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. They are mainly used in front wheel drive vehicles. Modern rear wheel drive cars with independent rear suspension typically use CV joints at the ends of the rear axle halfshafts and increasingly use them on the drive shafts.

Test table for five-function test of driving shaft assembly of constant velocity universal joint

The invention relates to a test table for a five-function test of a driving shaft assembly of a constant velocity universal joint. The test table comprises a rack, a fixing end and a slippage end, wherein the fixing end and the slippage end are located on the rack; the fixing end comprises a guide rail and a sliding block, a swinging bedplate, a linear displacement driving assembly, a sliding bedplate, a torque rotating speed sensor, a spindle supporting base, a spindle, a clamp, a swinging and driving assembly, a spindle driving assembly, a linear displacement sensor and the like; the slippage end comprises a swinging bedplate, a clamp, a rotating shaft, a supporting base, a pull pressure sensor, a rear sliding board, a front sliding board, a guide rail and a sliding block, a swinging and driving assembly, a linear displacement sensor and the like; and the rack comprises a guide rail and a sliding block, a linear displacement sensor, a linear displacement driving assembly and the like. With regard to the driving shaft assemblies of the constant velocity universal joint with the different structures and sizes of the working pieces, the test table can test working pieces with various specifications and structures by replacing the clamps, and adjusting the position of the clamp at the fixing end and the position of the clamp at the slippage end, and the size of a rotary center distance.
Owner:SHANGHAI JIAO TONG UNIV

Method for testing key performance of drive shaft assembly of constant velocity universal joint

The invention relates to a method for testing the key performance of a drive shaft assembly of a constant velocity universal joint in the technical field of automobile part test. The method comprises: (1) automobile steering equivalent testing: using a Hermite interpolation method to locate a critical point, judging the boundary value of neighborhood of the critical point by a cubic interpolation polynomial, thereby realizing the testing on high precision swing moment and swing angle properties; (2) equivalent testing on integrated relationship of mobile terminal universal joint displacement, swing angle and sliding force: using an inflection point subdivision sampling method and an optimal square approximation method to carry out fitting on the boundary value of the neighborhood of an inflection point by a Legendre polynomial operator, thereby realizing the testing on the integrated relationship of the displacement, the swing angle and the sliding force; and (3) power transmission stability equivalent testing: using a LOG operator to carry out precise edge localization of the boundary position,and using an optimal uniform approximation method to carry out fitting on the boundary property value in the domain of the critical point, thereby realizing the testing on assembly clearance property. In the invention, high precision automatic detection technology and algorithm are used to test multiple key performance indexes, thereby effectively reflecting the performance property of tested products.
Owner:上海诚测电子科技发展有限公司

High-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease with long service life and preparation method thereof

The invention discloses high-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease with long service life and a preparation method thereof. The lubricating grease isprepared from the following components in percentage by weight: 80 percent to 85 percent of mixed basic oil, 9 percent to 16 percent of a thickening agent, 0.5 percent to 1.5 percent of a structure improver, 1.0 percent to 3.0 percent of an extreme pressure anti-wear agent, 0.5 percent to 1.5 percent of a metal deactivating agent, 0.05 percent to 1.5 percent of an anti-rust agent and 0.3 percent to 1.5 percent of an antioxidant, wherein the mixed basic oil contains alkyl naphthalene and the alkyl naphthalene accounts for 10 weight percent to 30 weight percent of the mixed basic oil. The high-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease has the advantages that the product has excellent high temperature performance, water resistance, extreme pressure resistance and anti-wear performance and has a stable structure; the production is safe and environmentally friendly and the technology is simple; the high-temperature-resisting and low-temperature-resisting extreme pressure lubricating grease is suitable for various lubricating occasions with high-temperature-resisting and low-temperature-resisting requirements and extreme pressure anti-wear requirements, such as fields including automobile hub bearings, equal-speed universal joints and high-temperature bearings.
Owner:JIANGSU LOPALTECH
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