Hydraulic driving device

Abstract

The invention discloses a hydraulic driving device which comprises a driving device, an input device and an output device, wherein the input device comprises an input cylinder. A plunger is arranged in the input cylinder, an input hydraulic cavity is formed by one end of the plunger and the input cylinder, and hydraulic medium is put into the input hydraulic cavity. A guiding block is arranged outside the input cylinder, and a position limiting structure is arranged between the guiding block and the plunger. The output device comprises an output cylinder, and an output piston is arranged in the output cylinder. A reset spring is arranged between the output side of the output cylinder and the output cylinder, and an output hydraulic cavity is formed by the other end of the output piston andthe output cylinder. The output hydraulic cavity is connected with the input hydraulic cavity. The hydraulic driving device is characterized by comprising a servo motor; one end of the servo motor isconnected with a sliding screw rod through a coupling; and the sliding screw rod is connected with the plunger far from one end of the input hydraulic cavity. By utilizing the driving device and thefunctions of the input device and the output device, the invention enhances the utilization rate of energy sources, realizes low pollution and is easy to detect and control output force.

Description

technical field [0001] The invention relates to a transmission device, in particular to a pumpless hydraulic transmission device using a servo motor. Background technique [0002] In the current industrial production, the use of transmission devices is very common. Among them, the hydraulic transmission device with liquid as the working medium has the advantages of stepless speed regulation and stable transmission. It is widely used on machine tools; because of its convenient layout and easy automation, it is widely used on combined machine tools; due to the large output force (or torque) of actuators, convenient manipulation, and flexible layout, hydraulic components and electrical appliances are easy to use. To achieve automation and remote control, hydraulic transmission is often used in many control mechanisms on metallurgical machinery and mining machinery, drilling machinery, lifting and transportation machinery, construction machinery, plastic machinery, agricultural ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the transmission of fluid transmission, there are many conversion links in the energy conversion process, and due to the high-speed rotation of the pump, it will bring a lot of energy loss and noise pollution, usually the traditional hydraulic transmission is more suitable for use Due to the long-term mass production method, it cannot meet the short-cycle and individualized production needs of the modern market. The traditional hydraulic transmission device mainly has the following defects: ①The output force is difficult to control. If the output force is too small, the output during processing will Insufficient force will affect the processing of the workpiece, while excessive output force will deform the workpiece; ②more energy loss

The energy route of the traditional transmission device is: the electric motor converts electrical energy into mechanical energy, then converts it into pressure energy through an air machine or a hydraulic pump, and finally converts it into mechanical energy output through a piston. Many output links will lead to low energy utilization.

However, if a traditional high-speed motor is used to drive, there are the following defects: ① Since the motor runs at a high speed, but in practice it does not need a large speed, it is necessary to add a decelerator on the output shaft of the motor, so that the occupied space is greatly increased. increase; ②When the workpiece to be processed is far away, the output force work is more difficult to achieve; ③In actual use, the motor is not allowed to run for a long time, which requires the self-locking function to be realized after clamping the workpiece, thereby reducing the range of institutions selected

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