Tripod universal joint and heavy load type transmission shaft assembly

Abstract

The invention relates to a tripod universal joint and a heavy load type transmission shaft assembly. The tripod universal joint comprises a universal joint shell, tripod components, foot shafts and double-ball-ring units, wherein the double-ball-ring units are provided with outer ball rings and inner ball rings, the outer ball rings freely rotate under the support of the inner ball rings, the peripheral surfaces of the inner ball rings are conical surfaces, the inner ball rings are arranged outside the foot shafts in a sleeving manner, and roller pins are arranged between the foot shafts and the inner ball rings. The heavy load type transmission shaft assembly comprises a first shaft, and the two ends of the first shaft are separately arranged on a first universal joint and a second universal joint in a sleeving manner. The end, opposite to the connecting end of the first universal joint and the first shaft, of the tripod component accommodated in the first universal joint is provided with a first connecting assembly detachably connected with a second shaft in a direction parallel with the axis. The end, opposite to the connecting end of the second universal joint and the first shaft, of the tripod component accommodated in the second universal joint is provided with a second connecting assembly detachably connected with a third shaft in the direction parallel with the axis. The tripod universal joint has the characteristics of large slippage and large swing. The heavy load type transmission shaft assembly is convenient to assemble and disassemble.

Description

technical field [0001] The invention relates to an automobile accessory, in particular to a tripod type universal joint and a heavy-duty transmission shaft assembly thereof. Background technique [0002] The constant velocity universal joint drive shaft assembly as the power transmission device between the automobile engine and the wheels is an important part of the automobile transmission system, which can realize constant angular speed transmission when the angle between the input shaft and the output shaft is not zero. Many front-wheel-drive cars transmit torque and motion through a pair of fixed CV joints (hub end) and axially sliding CV joints (differential end). But the traditional three-ball pin (such as figure 1 ) in the following situations: [0003] 1. The needle rollers of the traditional three-ball pin assembly are all slender, with low load-carrying capacity, easy fatigue and wear, and are not resistant to instantaneous impact loads. They do not increase wit...

AI Technical Summary

Problems solved by technology

[0003] 1. The needle rollers of the traditional three-ball pin assembly are all slender, with low load-carrying capacity, easy fatigue and wear, and are not resistant to instantaneous impact loads. They do not increase with the volume of the product and the load it bears. If When the product is very large and requires sufficient strength load and instantaneous impact load, the slender needle roller cannot provide sufficient load-bearing capacity, which leads to the fracture of the needle roller and the failure of the three-ball pin assembly

[0004] 2. The traditional slender needle roller needs to be limited by the axial positioning of the retaining ring and the elastic retaining ring, so it is necessary to process the relief groove and the spring groove on the pin shaft, which not only increases the process, but also increases the cost of the process and increases The cost of manufacturing the retaining ring and the elastic retaining ring is reduced, and the positioning of the retaining ring and the retaining ring is required for each component during assembly, resulting in difficulties in manual assembly and disassembly. When the ball ring slips, it is stuck with the retaining ring and cannot return to the original position, causing the three-ball pin assembly to be stuck in the groove shell, fail to be damaged, and be replaced as a whole.

[0005] 3. The ball ring and the groove shell belong to a single arc contact, the gap is large, the sliding resistance is large, and the wear is serious, so the three-ball pin assembly fails

[0006] 4. The sliding amount of the ball ring on the pin shaft is small, and the swing angle is also small, generally not exceeding 23°, which cannot meet customer needs

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