Hydraulic transmission system driven by four wheels

Abstract

The invention discloses a hydraulic transmission system driven by four wheels. The hydraulic transmission system comprises a torque converter, a fuel feed pump and a gearbox. A pump wheel on the torque converter is connected with the fuel feed pump. A turbine on the torque converter is connected with a connecting shaft on a reversing clutch drum through a spline. A first transmission gear is fixedly connected to the connecting shaft of the reversing clutch drum and is meshed with a second transmission gear and a third transmission gear. The second transmission gear and the third transmission gear are fixed to a connecting shaft of a high-speed advancing clutch drum and a connecting shaft of a low-speed advancing clutch drum respectively. A reversing gear, a high-speed advancing-gear gear and a low-speed advancing-gear gear are arranged on an internal friction piece of the reversing clutch drum, an internal friction piece of the high-speed advancing clutch drum and an internal friction piece of the low-speed advancing clutch drum respectively. According to the hydraulic transmission system driven by the four wheels, combining and disengaging of a bridge disengaging device are achieved through a hydraulic clutch, electronic control is convenient, and therefore conversion between four-wheel driving and two-wheel driving can be achieved without shutdowns, and operation is more convenient and more rapid.

Description

Technical field: [0001] The invention relates to the technical field of forklift gearboxes, and more particularly to a four-wheel drive hydraulic transmission system. Background technique: [0002] At present, in the hydraulic transmission system of the four-wheel drive forklift in the field of forklift manufacturing, the conversion of the four-wheel drive to the two-wheel drive is generally realized by mechanical off-bridge, and the mechanical off-bridge device realizes the combination and separation of the transfer case, while its gearbox The gear clutch generally adopts the structure of two clutches on one shaft, but it has shortcomings, mainly that the combination and separation of the mechanical bridge release device can only be realized by parking, the operation is cumbersome and difficult, and the structure of the two clutches is If it is arranged on one shaft, the shaft is required to be longer, which makes the axial length of the gearbox larger and occupies a large ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the four-wheel drive forklift hydraulic transmission system in the field of forklift manufacturing, the conversion from four-wheel drive to two-wheel drive is generally realized through mechanical detachment. The mechanical detachment device realizes the combination and separation of the transfer case. The gear clutch generally adopts the structure of two clutches on one shaft, but its disadvantages are mainly that the combination and separation of the mechanical release bridge device needs to be stopped to achieve, the operation is more cumbersome and difficult, and the structure of the two clutches If it is installed on one shaft, the shaft is required to be longer, which makes the axial length of the gearbox larger and takes up a lot of space, making the layout of the whole vehicle more difficult

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