A high-power tractor hydraulic-mechanical stepless transmission
A technology of continuously variable transmission and hydraulic machinery, applied in mechanical equipment, transmission devices, components with teeth, etc., can solve the problems of difficult installation and large volume of hydraulic mechanical continuously variable transmission.
Inactive Publication Date: 2019-10-11
南京德能动力科技有限公司
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Problems solved by technology
[0003] The present invention proposes a hydraulic-mechanical continuously variable transmission scheme with compact and simple structure, convenient and reliable PTO output, high transmission efficiency, and the control system can realize forward and reverse multi-stage continuous changes, which can solve the problem that the known hydraulic-mechanical continuously variable transmission is bulky and difficult to install. Difficulties and many other technical problems
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[0014] The present invention is a hydraulic-mechanical stepless transmission for a high-power tractor. The power of the engine 1 is shunted to the mechanical transmission part and the hydraulic transmission part through the power input shaft 3 through the forward / reverse gear pair 21 or 7 and the hydraulic power distribution gear pair 4, respectively. power split. The forward / reverse synchronizer 20 can be separately combined with the forward / reverse gear pair 21 or 7 to realize the forward and reverse of the tractor, wherein the backward is realized by adding an idler wheel 22 . The variable pump 6 is connected to the quantitative motor 12 through the high-pressure oil pipe. The displacement ratio of the variable pump 6 is controlled by the electronic control module, which can realize the displacement ratio from -1 to 0 to +1, and the output shaft speed of the quantitative motor 12 will change from Change from reverse rotation to stop to forward rotation to realize the forwar...
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The invention discloses a high-power tractor hydraulic machinery stepless speed changer adopting a novel structure design scheme. The high-power tractor hydraulic machinery stepless speed changer is characterized in that a power input shaft (3) and a power output shaft (9) are always positioned on the same axial line, when a high-power tractor runs or parks, the PTO (power take off) output can be realized through the action of an independent operation double-action clutch (2), and the output power of four sections is respectively the power output after busbar hydraulic power and mechanical power are converged by a front planetary row (16) and a back planetary row (15). The speed changer has the following characteristics that the structure is compact, the dimension is reasonable, the power distribution can meet different work conditions of the tractor, in addition, the output rotating speed and the output torque can be automatically regulated according to external load changes, and an engine is enabled to work in the optimal state. The design scheme has the advantages that the advantages of mechanical step speed change and static hydraulic stepless speed change are integrated, the power of the four sections is respectively output after hydraulic machinery confluence, and the transmission efficiency is improved.
Description
technical field [0001] The invention belongs to the field of hydraulic mechanical transmission, and relates to a hydraulic mechanical stepless transmission of a high-power tractor. Background technique [0002] With the continuous improvement of the country's requirements for the automation and intelligence of agricultural machinery, high-power, multi-purpose tractors have become an inevitable trend in future development. The use of hydraulic-mechanical continuously variable transmissions on high-power tractors has obvious advantages in terms of improving tractor operability, reducing driver labor intensity, and improving vehicle power, fuel economy, and work efficiency. and good application prospects. The transmission proposed in the patent text 201120388095.0 is composed of three basic components: a variable pump, a fixed-quantity motor, and a planetary busbar, but it has disadvantages such as large volume, low efficiency, and difficult installation. In order to solve th...
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IPC IPC(8): F16H3/44F16H57/023F16H61/30
Inventor 张海军肖茂华刘峰王成飞张伟伟周康朱思洪张倩
Owner 南京德能动力科技有限公司