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Hydro-mechanical composite stepless transmission device of loader

A hydraulic machinery, stepless transmission technology, applied in transmission, fluid transmission, mechanical equipment, etc., can solve the problems of high power, low efficiency, discontinuous speed of hydraulic components, etc., to simplify design, reduce noise, The effect of improving fuel economy

Active Publication Date: 2017-09-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power of the hydraulic components required for the transmission scheme of 2 hydraulic mechanical sections is relatively large; for the transmission scheme of 3 hydraulic mechanical sections, the speed of the hydraulic components is still discontinuous when switching between the second and third sections
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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  • Hydro-mechanical composite stepless transmission device of loader
  • Hydro-mechanical composite stepless transmission device of loader
  • Hydro-mechanical composite stepless transmission device of loader

Examples

Experimental program
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Effect test

Embodiment 1

[0044] This embodiment provides a three-stage hydraulic-mechanical composite stepless transmission device for a loader, which includes three hydraulic-mechanical sections. As for the shifting gearbox, the invention can greatly improve the transmission efficiency of the transmission device, and can make the engine work in the economic speed range, and reduce the fuel consumption and noise level of the loader. The engine power is output to the front and rear axles of the loader after passing through the hydromechanical compound stepless transmission device.

[0045] Such as figure 1 As shown, the stepless transmission device includes: hydraulic speed regulation circuit, CR-CR diversion and confluence mechanism, fixed-axis gear transmission mechanism of hydraulic machinery stage I, fixed-axis gear transmission mechanism of hydraulic machinery stage II, fixed-axis gear transmission mechanism of hydraulic machinery stage III Institutions and Inverted Institutions.

[0046] The hy...

Embodiment 2

[0066] Such as Image 6 As shown, this embodiment and figure 1 Compared with the shown embodiment 1, the design of the high and low gears is cancelled, thereby reducing the number of gear engagements and increasing the efficiency. That is, the clutch KH16, the clutch KL17, the gear 18, the gear E12 and the gear K22 are omitted. with the said figure 1 Compared with the embodiment, the working section only includes the hydraulic machinery section I and the hydraulic machinery section II; the retreat is two hydraulic machinery sections.

[0067] The specific transmission diagram of the transmission device in this embodiment is as follows: Image 6 As shown, it includes: hydraulic speed regulating circuit, CR-CR sub-convergence mechanism, fixed-axis gear transmission mechanism of hydraulic machinery section I, fixed-axis gear transmission mechanism of hydraulic machinery section II, and forward and reverse mechanism. The engine power is output to the front and rear axles of th...

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Abstract

The invention discloses a hydro-mechanical composite stepless transmission device of a loader. A hydro-mechanical segment is adopted for starting, and the low speed transmission efficiency is improved. The transmission device comprises a hydraulic speed regulating loop, a CR-CR dividing and converging mechanism, a hydro-mechanical I segment fixed shaft gear transmission mechanism, a fixed shaft gear transmission mechanism and a forward reversing mechanism. Compared with a hydraulic force and mechanical power shifting gearbox of a loader, by means of the hydro-mechanical composite stepless transmission device of the loader, the transmission efficiency of the transmission device can be substantially improved, an engine can be made to normally work in an economical rotating speed interval, and the oil consumption and the noise level of the loader are reduced.

Description

technical field [0001] The invention relates to a stepless transmission device, in particular to a hydraulic-mechanical compound stepless transmission device for a loader, which belongs to the technical field of power transmission. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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