Oil cylinder driving lifting mechanism and dynamic compactor

Abstract

The invention discloses an oil cylinder driving lifting mechanism and a dynamic compactor. The oil cylinder driving lifting mechanism comprises a fixed pulley block, a movable pulley block, a lifting rope, a driving oil cylinder and an automatic connection device, wherein a first end of the driving oil cylinder is connected with a vehicle body of the dynamic compactor; a second end of the driving oil cylinder is connected with the movable pulley block in a removable manner; and when the second end of the driving oil cylinder moves to a connection position from a disconnection position, the automatic connection device is disconnected from the second end of the driving oil cylinder and is connected with the movable pulley block. After the movable pulley block is driven to a set position which corresponds to the disconnection position, the driving oil cylinder can be connected with the movable pulley block in the removable manner, and a pounder is released to perform tamping. Tamping energy loss caused by the driving oil cylinder is avoided.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an oil cylinder-driven lifting mechanism and a dynamic compaction machine. Background technique [0002] In the existing lifting technology of dynamic tamping machines, there are mainly two solutions: the traditional winch lifting mechanism and the cylinder-driven lifting mechanism applied in recent years. The hoisting mechanism is mainly composed of motors (electric motors or hydraulic motors), reducers, clutches, drums, brakes and other components. The mechanism is complex, the reliability is poor, and the manufacturing and maintenance costs are high. [0003] figure 1 It is a schematic diagram of the cylinder-driven lifting mechanism in the prior art. exist figure 1 In the cylinder-driven lifting mechanism shown, the drive cylinder 1 expands and contracts to drive the movable pulley block 2 to move relative to the fixed pulley block 3, and the movable pulley b...

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Problems solved by technology

[0004] However, there are still two problems in the above-mentioned oil cylinder-driven lifting mechanism that need to be solved urgently: on the one hand, the falling speed of the rammer in the non-decoupling mode is slow due to the oil return resistance of the oil cylinder, and the loss of tamping energy reaches more than 20%. Low

On the other hand, due to the working nature of the dynamic compaction machine, the oil cylinder has to bear frequent impact and heavy loads, resulting in a high failure rate of the oil cylinder, short service life, and a large power loss due to the temperature rise of the hydraulic oil, which makes the dynamic compaction machine unable to operate continuously for a long time. Ramming operation requires intermittent downtime for maintenance and heat dissipation, resulting in low work efficiency

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