A single-engine crane and its power transmission device

Abstract

The present invention relates to a crane with a single engine and its power transmission device, which comprises an off-board engine, a slewing drive mechanism and an on-board transfer case. The rotary drive mechanism is connected with the transfer case of the upper vehicle, and the rotary drive mechanism can drive the transfer case of the upper vehicle through the torque and / or power provided by the engine of the lower vehicle. Each power output port of the moving box is connected with each hydraulic pump of the boarding car respectively. The invention can solve the space shortage problem caused by arranging a separate power system on board the vehicle, and the weight is reduced, and the cost of the whole machine is reduced.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a single-engine crane and a power transmission device thereof. Background technique [0002] Such as figure 1 As shown, in the field of construction machinery, mobile cranes are usually divided into upper car 1' and lower car 2'. Upper car 1' is connected to lower car 2' through slewing bearing 3'. The effect of getting off the bus 2' is to play the function of the load-carrying vehicle in the process of driving; the effect of getting on the bus 1' is to implement the lifting operation, and when the getting on the bus 1' works, it is necessary to do a 360-degree turning action on the getting off the bus 2'. [0003] At present, there are two supporting schemes for the whole machine power system of mobile cranes: single-engine power system, which uses one engine for getting on and off the car, and performs road driving and lifting operations; The car engine performs lifting ...

AI Technical Summary

Problems solved by technology

When the engine starts, the starter motor works together with the transfer case and the hydraulic oil pump. At this time, the load resistance of the entire transmission system is relatively large. Especially in low temperature environments, the viscosity of the oil in the transfer case and the hydraulic oil in the hydraulic transmission system increases. , so that the resistance torque that the starter motor needs to overcome increases, even exceeding the maximum torque that the starter motor can provide, resulting in the failure of the engine to start

At present, the transfer case of the large-tonnage engineering cranes used at home and abroad cannot be equipped with a clutch, and the connection mode of engine-clutch-gearbox cannot be used.

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