Hydraulic transmission for 2-3.5t hydraulic forklift with pump mechanism

Abstract

The invention relates to a hydrodynamic transmission for a 2-3.5t hydraulic fork truck with a pump mechanism. A lubricating pump transmission shaft is arranged at one side of the upper part of a transmission box, a lubricating pump is arranged at the extended end of the lubricating pump transmission shaft, and a lubricating pump transmission gear A is arranged on the lubricating pump transmissionshaft; a hollow working pump transmission shaft tube is arranged at the other side of the upper part of the transmission box, a forward clutch of a lubricating pump transmission gear B and a forward gear are sequentially and fixedly arranged at one side of the working pump transmission shaft tube, the forward clutch comprises a forward clutch shell gear, and an oil supply pump and a hydraulic torque converter are arranged at the other side of the working pump transmission shaft tube; a working pump transmission shaft is positioned in the working pump transmission shaft tube, and the external end of the working pump transmission shaft is connected with a working pump; a backward clutch shaft is arranged below the working pump transmission shaft tube, a backward clutch and a backward gear are sequentially arranged on the backward clutch shaft, and a clutch shell gear is arranged on a backward clutch shell; and a transmission shaft is arranged below the lubricating pump transmission shaft, and an output gear is arranged on the transmission shaft. The hydrodynamic transmission is provided with two power output ports, and the working pump and the lubricating pump are simultaneously driven, so that a wet braking drive axle can be conveniently selected for a whole vehicle.

Description

technical field [0001] The invention belongs to the technical field of forklift transmissions, in particular to transmissions for 2-3.5t hydraulic forklifts. Background technique [0002] At present, domestic 2-3.5t hydraulic forklifts use the engine to directly pull the working pump or the engine itself directly with the working pump. The hydraulic transmission outputs the power from the combined work of the engine and the hydraulic torque converter to the The drive axle, the hydraulic transmission and the drive axle are rigidly connected by bolts. This structure mainly has the following defects: 1. The hydraulic transmission itself does not have a working pump, and the engine directly pulls the pump or the engine itself directly carries the pump. Due to the large vibration when the engine is starting and idling, the pump is unstable and has a short life, and the cost is high due to the addition of a transition connection device, and installation and maintenance are difficu...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the transmission of the existing 2-3.5t hydraulic forklift does not have a working pump, and the transmission cannot be removed from the whole vehicle for maintenance, the present invention provides a 2-3.5t hydraulic forklift with a pump mechanism. Forklift hydraulic transmission

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