Hydraulic controlled clutch and speed variator

Abstract

The invention provides a hydraulic controlled clutch and a speed variator. The clutch comprises a brake drum and brake assemblies, wherein the brake assemblies are placed inside the brake drum, and the brake assemblies comprise a brake base disc, brake branch pumps, a hydraulic pipeline, brake shoes, brake shoe baffles, support pins and return springs; four brake shoes are provided which are correspondingly connected with the supporting pins along the edge of the brake base disc in a pivoted mode, the brake shoe baffles are fixed on the brake base disc and make contact with the inner side faces of the brake shoes to limit the brake shoes; and the outer side faces of the brake shoes are separated from / make contact with the inner side face of the brake drum so as to realize the separation / connection between the brake shoes and the brake drum, each brake branch pump is provided with two pistons, the end parts of the pistons abut against the end parts, far away from one ends of the supporting pins, of the brake shoes, the pistons are moved through the hydraulic driving in the hydraulic pipeline, and the pistons push the brake shoes to expand outwards to realize the separation / connection between the brake assemblies and the brake drum. According to the technical scheme, the transmission stability of the clutch can be improved.

Description

technical field [0001] The invention relates to a clutch and a speed change device, in particular to a hydraulic control clutch and a speed change device. Background technique [0002] A transmission is a device that changes the running speed of a car and consists of many gears with different diameters. The transmission is mainly used to change the torque and speed of the engine crankshaft to meet the needs of different driving wheel traction and vehicle speed requirements under different driving conditions such as starting, accelerating, driving, and overcoming various road obstacles. At present, the mainstream automatic transmissions used in automobiles include AT, CVT and dual-clutch and other types. Each automatic transmission has its pros and cons. For example: (1) AT transmission has mature technology, good ride comfort, and large torque capacity; however, due to its complex structure, it is difficult to produce, so the manufacturing cost of AT transmission is relati...

AI Technical Summary

Problems solved by technology

For example: (1) AT transmission has mature technology, good ride comfort, and high torque capacity; however, due to the complex structure, it is difficult to produce, so the manufacturing cost of AT transmission is relatively high

In addition, because the AT transmission includes a hydraulic torque converter component, the power transmission efficiency is slightly lower; (2) The CVT continuously variable transmission has better smoothness, but the disadvantage is that the load torque is small and the life of the power transmission belt is limited, which is generally only suitable for low-emission vehicles; (3) The transmission efficiency of the dual-clutch transmission is relatively high, but judging from the actual use effect, the shifting feeling is strong and the driving experience is not good

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