Multi-gear planet type hydraulic transmission driving mechanism

Abstract

The invention discloses a multi-gear planet type hydraulic transmission driving mechanism which is mainly composed of a locking and vibration reducing clutch assembly (A), a hydraulic torque converter (B), a power output device (5), an internal cycloidal gear pump (6), a turbine output shaft (21), a planet gearbox (D), an output shaft (14), a speed reducer assembly (E) and the like. According to the multi-gear planet type hydraulic transmission driving mechanism disclosed by the invention, the power output of seven advancing gears and one reversing gear can be realized by using the novel hydraulic transmission driving structure form on the basis of not increasing the numbers of the original clutches, brakes and planet lines. The invention has the advantages of compact structure and smaller volume, so the whole machine arrangement is facilitated.

Description

technical field [0001] The invention relates to the field of mechanical transmission, and belongs to a multi-gear planetary hydraulic transmission transmission mechanism. Background technique [0002] The transmission device of the planetary hydraulic transmission is generally composed of a hydraulic torque converter and a mechanical planetary gear box. It is characterized by coaxial transmission and is suitable for machines with coaxial arrangement and one-way output; High power density, suitable for high-power machinery and machinery and vehicles that require compact layout. This kind of transmission device has strong self-adaptive performance, which can automatically adjust the running state of the vehicle. It has become the first choice for the transmission system of off-highway vehicles such as heavy dump trucks, scrapers, excavators, vibratory rollers, and multi-purpose engineering vehicles. main transmission. [0003] "Vehicle Hydraulic Transmission" National Defens...

AI Technical Summary

Problems solved by technology

However, with the development of technology and the increasingly complex field operating environment, the technical requirements for hydraulic transmission transmissions for off-highway vehicles and high-power operating equipment in the field of mining and construction machinery are constantly increasing. The traditional Ali with six forward gears Senfei road vehicle hydraulic transmission can no longer meet the operating requirements of field operation equipment in certain specific working environments

For example, in order to increase the speed of movement in a low-load state, many walking construction machinery equipment requires an overdrive gear with a smaller transmission ratio when the engine performance remains unchanged, while the traditional hydraulic transmission with six forward gears The device has only one overspeed gear, and the transmission ratio is relatively large, which is difficult to meet the needs of actual work

[0004] The number of forward speed ratios available in a fluid transmission determines the number of times the engine torque range is repeated, and conventional Allison off-highway fluid transmissions only have a maximum of six forward speeds, so the ratio steps between ratios Large, the fuel consumption point is difficult to approach the most effective point, and the fuel economy is poor; secondly, the two rotating clutches of this hydraulic transmission adopt a series structure, and its oil pump assembly adopts an external arrangement, which makes the whole machine The volume and weight of the machine are relatively large, which can no longer meet the requirements of modern field operation equipment for the miniaturization of the hydraulic transmission device.

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