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Loader hydraulic mechanical stepless transmission

A hydraulic machinery, stepless transmission technology, applied in transmission, fluid transmission, mechanical equipment, etc., can solve problems such as low efficiency, and achieve the effect of reducing noise, ensuring work efficiency, high transmission efficiency and infinitely variable speed.

Active Publication Date: 2019-12-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both schemes use the hydraulic section to start, and the efficiency is lower than that of the hydraulic mechanical section.

Method used

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  • Loader hydraulic mechanical stepless transmission
  • Loader hydraulic mechanical stepless transmission

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0034] This embodiment provides a three-stage hydraulic-mechanical compound stepless transmission device for a loader, which includes three hydraulic-mechanical stages, and adopts the hydraulic-mechanical stage to start and improve transmission efficiency in low-speed working conditions. Utilizing the combined power of the hydraulic speed regulating circuit and the mechanical circuit, the hydraulic circuit only transmits part of the power, realizing high transmission efficiency and stepless speed regulation. Compared with the hydromechanical power shift gearbox of the loader, the present invention can greatly improve the transmission efficiency of the transmission device, and can make the engine always work in the economic speed range, thereby reducing the fuel consumption and noise level of the loader.

[0035] The stepless transmission device includes: h...

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Abstract

The invention discloses a hydromechanical stepless transmission device for a loading machine. The hydromechanical stepless transmission device comprises a hydraulic speed adjusting loop, a planetary division confluence mechanism, a hydromechanical fixed shaft gear transmission mechanism and a reverse gear mechanism. According to the transmission device, the planetary mechanism is adopted for converging hydraulic power and mechanical power and formed by connecting three hydromechanical sections in a division torque confluence speed power division flow, and the three hydromechanical sections are used for starting, low-speed operation and high-speed traveling correspondingly. A reverse gear comprises two hydromechanical sections. Circulating power does not exist in all the hydromechanical sections, and compared with a hydraulic force mechanical power gear shifting gearbox, the transmission device can obtain higher transmission efficiency. The sections are switched only by controlling one clutch, and smooth switching can be achieved.

Description

technical field [0001] The invention relates to a stepless transmission device, in particular to a stepless transmission device suitable for loader hydraulic machinery. Background technique [0002] At present, construction machinery loaders generally use hydraulic mechanical power shift gearboxes. Due to the needs of loading operations, the vehicle speed and engine load change drastically, and the efficiency of the hydraulic torque converter is low, resulting in a maximum transmission efficiency of about 75%. [0003] The hydrostatic transmission can conveniently realize stepless speed regulation, so that the engine of the loader can always work in the economic speed range, which can improve the energy utilization efficiency of the vehicle; however, the efficiency of the hydraulic pump motor closed speed regulation circuit used in the hydrostatic transmission is relatively low Therefore, compared with the power shift hydromechanical transmission, the improvement potential o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H47/04
CPCF16H47/04F16H2047/045
Inventor 彭增雄胡纪滨魏超
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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