Hydraulic assembly of electro-hydraulic switch machine

Abstract

The invention provides a hydraulic assembly of an electro-hydraulic switch machine, which comprises an oil tank, an oil pump and an oil cylinder, which are connected together through an oil pipeline, and a piston is arranged in the oil cylinder. The hydraulic assembly is characterized in that the cylinder body of the oil cylinder is fixed on a rack, and the piston therein moves; and a gear rack tooth form is processed on the piston rod of the piston to form a piston gear rack. The oil tank, the oil pump and the oil cylinder in the hydraulic assembly are fixedly connected together, and the oil pipeline therebetween is arranged in an oil way block. The hydraulic assembly provided in the invention can guarantee the movement coordination, effectively avoid leakage and guarantee a more compact structure of the switch machine.

Description

technical field [0001] The invention relates to an electrohydraulic switch machine, in particular to a hydraulic assembly for the electrohydraulic switch machine. Background technique [0002] The electro-hydraulic switch machine is a special equipment for centralized control of switching switches in railways, underground railways, and urban rail transit stations. It can convert and lock the point rail or center rail of the switch, and at the same time give the position indication of the corresponding switch point rail or center rail. [0003] The electro-hydraulic switch machines in the prior art include electric motors, hydraulic stations, switching and locking mechanisms, and display mechanisms, which are connected to each other; most of the existing electro-hydraulic switch machines are directly connected to the pulling point rails or cores through hydraulic cylinders. The moving parts of the rail, the hydraulic cylinder device in the hydraulic drive mechanism, the hydr...

AI Technical Summary

Problems solved by technology

Such a hydraulic drive mechanism has some disadvantages: (1) It is difficult to coordinate and synchronize when multiple switch machines pull the point rail or the core rail. In this way, the length of the point rail or core rail also increases

Since the oil supply start and end times of each point machine are inconsistent, it is difficult for multiple point machines to be synchronized

The size of the switch machine is large, and the problem of the hydraulic drive mechanism has a great impact on the large size. Most of the existing switch machines use hydraulic devices to directly drive the moving parts that pull the point rail or the center rail. In addition, there are connecting pipelines, pipe fittings and corresponding sealing devices in the hydraulic cylinder device in the hydraulic drive mechanism, which will occupy a large space, which will make the length of the switch machine at least exceed 700mm

The size of the equipment is large, which cannot meet the needs of installing the switch machine in the middle of the track, especially in the subway, without occupying the space beside the track.

(2) Tight sealing cannot be achieved, and the hydraulic station with separate structure makes sealing more difficult

The manual mechanism of the switch machine in the prior art generally manually shakes the motor shaft indirectly. The motor shaft is driven by the manual mechanism, and its speed is far lower than the speed of the oil discharge required by the oil pump. Therefore, it is more laborious to manually operate. , hand drive the motor shaft, if it is accidentally powered on during maintenance and power outages, it will also cause accidents

If the moving parts in the hydraulic cylinder device or the parts behind it are manually driven, it is necessary to resist the pressure difference between the two ends of the hydraulic cylinder piston, and the existing hydraulic mechanism does not provide convenience for this

(4) The installation of the oil pipe of the peripheral hydraulic station must be completed on site, and the oil filling on site will take a long time for construction; during the oil filling process, the oil pipe will enter the air, and it needs to be exhausted. In addition, the process of installing the oil pipeline on site is cumbersome, resulting in poor installation quality Guarantee; the exposed oil pipeline is prone to leakage and other failures. The flow of hydraulic oil in the oil pipe will cause the pipeline to vibrate, and the friction between the pipeline and the pipe clamp on it will also cause the oil pipe to wear and leak. Therefore, the failure rate of the oil pipeline is high

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