Mechanical direct-connection and hydrostatic stepless parallel-connection tri-speed type dual-power input device

Abstract

The invention relates to a mechanical direct-connection and hydrostatic stepless parallel-connection tri-speed type dual-power input device. The device comprises a dual-power input mechanism and a tri-gear speed changing and braking mechanism which are mounted on a case. The dual-power input mechanism is connected with a power input mechanism of a transmission, and the tri-gear speed changing and braking mechanism is connected with the dual-power input mechanism. The power input mechanism comprises a first power input shaft and a power input tapered gear arranged on the first power input shaft. The dual-power input mechanism comprises a hydrostatic continuously variable transmission, a second power input shaft and a dual-power conversion shaft. The tri-gear speed changing and braking mechanism comprises a gear shifting shaft and a brake shaft. According to the mechanical direct-connection and hydrostatic stepless parallel-connection tri-speed type dual-power input device, the scheme that mechanical direct transmission and hydraulic stepless transmission are connected in parallel and then connected in series with tri-gear speed changing is adopted, the purpose of combination of mechanical direct transmission and hydraulic stepless transmission is achieved through a conversion combination sleeve, the transmission efficiency is effectively improved, and the operation performance of a track car is improved; and the efficient transmission range is expanded through a tri-gear shifting mechanism.

Description

technical field [0001] The invention relates to a mechanical direct connection and hydrostatic stepless parallel three-speed double power input device. Background technique [0002] In order to reduce the difficulty of agricultural machinery operation, many farmland operation machinery adopts hydrostatic continuously variable speed input devices, such as high-speed rice transplanters, transplanters, crawler tractors, crawler harvesters, etc. Although the hydrostatic continuously variable transmission device reduces the difficulty of operation and reduces the training time for agricultural machinery driving, the efficiency of the transmission system is reduced and the fuel consumption is greatly increased due to the use of hydraulic output. Especially when crawler tractors and crawler harvesters work in the field, the driving system is often in a heavy load state, the transmission efficiency is low, the fuel consumption is large, and the production cost is high. Although the...

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Problems solved by technology

Although the hydrostatic continuously variable transmission device reduces the difficulty of operation and reduces the training time for agricultural machinery driving, the efficiency of the transmission system is reduced and the fuel consumption is greatly increased due to the use of hydraulic output.

Especially when crawler tractors and crawler harvesters work in the field, the driving system is often in a heavy load state, the transmission efficiency is low, the fuel consumption is large, and the production cost is high

Although the transmission efficiency of the mechanical transmission device is much higher than that of the hydrostatic continuously variable transmission device, the operation of the mechanical transmission device needs to be skillfully coordinated with the clutch, accelerator, and gear position. The operation is more complicated, and its operation difficulty is equivalent to that of driving a car. Seriously affected the application of agricultural machinery products

At the same time, due to the continuously variable transmission device integrated with the hydraulic pump and motor, although the stepless transmission can be realized by changing the angle of the swash plate of the hydraulic pump, during the stepless change of the speed, when the device works near the rated speed, the efficiency is high and the torque output Stable, but when working at low speed, the efficiency of hydraulic transmission is reduced, and the output torque of hydraulic motor is small, which limits the efficient working range of tracked vehicles

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