WO2016180302A1

WO2016180302A1 - Trash compactor and driving system thereof

Info

Publication number: WO2016180302A1
Application number: PCT/CN2016/081407
Authority: WO
Inventors: 翟才余
Original assignee: 海沃机械（中国）有限公司
Priority date: 2015-05-08
Filing date: 2016-05-09
Publication date: 2016-11-17
Also published as: CN105196603A; SG11201709207RA; CN105196603B

Abstract

A driving system used in a trash compactor, in particular, a movable trash compactor comprises: a hydraulic circuit, the driving system being connected to a blade mechanism hydraulic cylinder component and a lifting mechanism hydraulic cylinder component of the trash compactor, to selectively drive one of the hydraulic cylinder components, the hydraulic circuit comprising a hydraulic pump (BP) and a motor (M1) that drives the hydraulic pump (BP), and a load current of the motor (M1) changing with a running state of a hydraulic cylinder component; and an electronic control module, used to control the hydraulic circuit, comprising a variable frequency controller (20) connected to the motor (M1), and used to detect the load current of the motor (M1) and control frequency-variable speed adjustment of the motor (M1), and the electronic control module controlling, by using the hydraulic circuit and based on the load current of the motor (M1), actions of the hydraulic cylinder components.

Description

Garbage compactor and its drive system

Technical field

The present invention generally relates to a drive system for a trash compactor, particularly a mobile refuse compactor, comprising a hydraulic circuit and an electronic control module for controlling the hydraulic circuit; and the invention also generally relates to having the drive system Garbage compactors, especially mobile garbage compactors.

Background technique

In the field of garbage disposal, garbage compactors are widely used to reduce the volume of collected garbage to facilitate transportation, storage and subsequent processing. A garbage compactor generally includes a casing, a pusher movably mounted in the casing, and a picking mechanism for supplying the garbage into the casing. After the feeding mechanism supplies the garbage to the box, the pusher is activated to compress the garbage. The garbage compactor is controlled by a control system including a hydraulic system and an electronic control section. The pusher and the picking mechanism are fully actuated by the hydraulic cylinders of the hydraulic system.

Typically, hydraulic cylinders are controlled by the loss of power of associated solenoid valves in the hydraulic system. The motion control of the hydraulic system is relatively complicated. For example, when controlling the pusher to run at a slow speed or at the end of the running time of the pusher, it is necessary to switch the solenoid valve under high pressure, resulting in relatively loud noise. In addition, throttling is required. The valve releases high pressure and fluid when the pusher stops, which causes the hydraulic oil of the hydraulic system to easily generate heat and reduce reliability. Moreover, in order to control the related actions of the hydraulic cylinder, more hydraulic components need to be used in the hydraulic system. Causes more problems at the point of failure.

In addition, in the prior art hydraulic system, the pressure of the hydraulic system will approach or reach a maximum whenever the resistance of the pusher encountering the compressed refuse reaches a maximum or the pusher reaches the end of its stroke. The pressure of the hydraulic system is measured by a pressure sensor provided in the hydraulic system, which transmits the measured signal to the electronic control section, and then the electronic control section converts the solenoid valve station based on the signal. The relatively long time from the confirmation of the maximum pressure to the corresponding action solenoid valve can cause the associated mechanical components, hydraulic system and electronic control portion to be overloaded and cause damage. If the fault occurs at the pressure sensor, electronic control part and solenoid valve, it will cause the whole machine or hydraulic system to always be at the maximum pressure. The resulting overload in the electronic control section, the hydraulic system and associated mechanical components is therefore high for a long time. This will reduce the life of the compactor.

In addition, since there is high-pressure oil in the hydraulic system during operation, when the machine is restarted after shutdown, the motor in the hydraulic system starts to have excessive current when the load is started, which affects the service life of the motor and also affects the external power grid. Stability, starting noise is high.

In addition, for mobile garbage compactors, customers sometimes need to move the whole machine to different occasions, but in some regions or countries, the power supply specifications may not be the same, such as 380V three-phase or 220V two-phase. The traditional mobile garbage compactor cannot adapt to the change of the power supply specification, which causes the problem of the power supply specification to be considered in the customer application, which causes trouble.

In addition, since the relevant sensors, such as pressure sensors, need to be installed in the cabinet of the compactor, this mounting point itself is also a potential oil leakage point. If oil leakage occurs, it will affect the normal operation of the whole machine, and this Installation points also require regular maintenance, resulting in high maintenance costs.

Summary of the invention

In view of the problems in the prior art indicated above, the present invention provides a novel drive system that can be applied to a garbage compactor, particularly a mobile garbage compactor, which does not require a pressure sensor or a pressure sensor in the hydraulic circuit. Other relevant measuring components can know the operating parameters of the hydraulic cylinder and adjust the operation of the relevant components based on the operating parameters. At the same time, the number of related components in the hydraulic circuit is reduced, the running reliability of the whole machine is improved, and the operation is also reduced. noise.

According to an aspect of the invention, a drive system for a garbage compactor, in particular a mobile waste compactor, is provided, the drive system comprising:

a hydraulic circuit coupled to the pusher mechanism hydraulic cylinder assembly and the picking mechanism hydraulic cylinder assembly of the refuse compactor to selectively drive one of the hydraulic cylinder assemblies, the hydraulic circuit including a hydraulic pump Driving an electric motor of the hydraulic pump, the load current of the electric motor being varied with an operating state of the hydraulic cylinder assembly;

An electronic control module for controlling the hydraulic circuit, the electronic control module comprising a variable frequency controller, the variable frequency controller being connected to the motor for monitoring a load current of the motor and frequency control of the motor Control, wherein the electronic control module The block controls the action of the hydraulic cylinder assembly via the hydraulic circuit based on a load current of the electric motor.

Optionally, the hydraulic circuit includes an electromagnetic reversing valve and a hydraulic oil tank for storing hydraulic oil, and the electromagnetic reversing valve is connected to the pusher mechanism hydraulic cylinder assembly and the lifting mechanism hydraulic cylinder assembly. Control of the electronic control module to selectively switch the oil path between one of the hydraulic cylinder assemblies and the hydraulic oil tank.

Optionally, each hydraulic cylinder assembly includes a hydraulic cylinder and a piston movable within the hydraulic cylinder, the direction of movement of the piston of the driven hydraulic cylinder assembly being dependent on the output steering of the electric motor.

Optionally, the speed of movement of the piston of the driven hydraulic cylinder assembly is dependent on the output power of the electric motor.

Optionally, the electronic control module is capable of determining an operating state of the driven hydraulic cylinder assembly based on the detected load current calculation, such as a position of the piston within the hydraulic cylinder.

Optionally, the electronic control module controls the pressure and/or flow rate of the hydraulic oil output by the hydraulic pump based on the detected load current to control the speed of the hydraulic cylinder assembly.

Optionally, the hydraulic circuit further includes a check valve and/or a relief valve disposed in an oil passage between the electromagnetic reversing valve and the hydraulic oil tank.

Optionally, the electronic control module includes a touch screen control panel for displaying and setting parameters of the drive system thereon.

Optionally, the electronic control module determines the amount of garbage in the garbage compactor based on a load current of the electric motor.

According to another aspect of the present invention, there is also provided a garbage compactor, in particular a mobile garbage compactor, comprising a pusher mechanism, a picking mechanism, and the aforementioned drive system for driving control of both.

DRAWINGS

The foregoing and other aspects of the present invention will be more fully understood from the following description of the appended claims. It should be noted that the proportions of the various figures may be different for the purpose of clarity, but this does not affect the understanding of the present invention. In the drawing:

Figure 1 is a schematic perspective view of a mobile garbage compactor, wherein a hydraulic cylinder assembly for a pusher mechanism;

Figure 2 is a schematic perspective view of a mobile garbage compactor in which a hydraulic cylinder assembly for a picking mechanism is identified;

Figure 3 is a view schematically showing a hydraulic circuit diagram according to an embodiment of the present invention in a drive system for a mobile garbage compactor;

Fig. 4 schematically shows a circuit diagram of an electronic control module in accordance with one embodiment of the present invention in a drive system for a mobile garbage compactor.

detailed description

In the drawings of the present application, structurally identical or functionally similar features are denoted by the same reference numerals.

The garbage compactor of the present invention will be described below in a specific embodiment. It should be clear that the technical content of all relevant descriptions is equally applicable to mobile garbage compactors.

As shown in FIGS. 1 and 2, the garbage compactor includes a housing in which a picking mechanism 2000 for disposing of garbage and a pusher mechanism 1000 for compressing the garbage are installed. The picking mechanism 2000 and the pusher mechanism 1000 operate via respective hydraulic cylinder assemblies. Each hydraulic cylinder assembly includes a hydraulic cylinder and a piston that is movable back and forth within the hydraulic cylinder. The piston of the pusher mechanism 1000 is operatively coupled to its pusher for driving the pusher to compress the trash. The hydraulic cylinder is provided with two hydraulic oil ports, and the two-way movement of the piston in the hydraulic cylinder is realized by sequentially injecting high-pressure fuel into different hydraulic ports.

The trash compactor also includes a drive system including a hydraulic circuit as shown in FIG. 3 and an electronic control module as shown in FIG.

Figure 3 shows only one specific embodiment of a hydraulic circuit in accordance with the present invention. The hydraulic circuit includes an electromagnetic reversing valve YV1, a valve assembly 200, two check valves C1 and C2, a hydraulic pump BP, and an electric motor M1. In the illustrated embodiment, the electromagnetic reversing valve YV1 is a two-position six-way valve, and the four ports A1, A2, B1, B2 of the valve are respectively via the hydraulic line and the two cylinders 1 of the pusher mechanism 1000 The hydraulic port and the two hydraulic ports of the hydraulic cylinder 2 of the lifting mechanism 2000 are connected.

As shown, the valve assembly 200 includes two relief valves F1, F2 and two one-way valves C3 and C4. The hydraulic pump BP can be a two-way quantitative hydraulic pump. The motor M1 drives the hydraulic pump BP to operate. According to the output power of the motor M1, the hydraulic pump BP can provide the hydraulic circuit Hydraulic oil with different pressures. The valve assembly 200 is connected to the remaining two ports A and B of the electromagnetic reversing valve YV1 via a hydraulic line.

The hydraulic circuit also includes a fuel tank 100 in which hydraulic oil for driving the hydraulic cylinder assembly is stored. The hydraulic lines leading from the fuel tank 100 are connected to the ports P1 and P2 of the valve assembly 200 via two check valves C1 and C2, respectively. In addition to this, the two check valves C1 and C2 are also fluidly connected to the hydraulic pump BP.

The operation of the hydraulic circuit according to an embodiment of the present invention will be described below.

When the motor M1 is rotating forward, the hydraulic oil in the oil tank 100 is drawn into the hydraulic pump BP via the check valve C2, and then enters the port P1 of the valve assembly 200 through the check valve C1. If the electromagnetic reversing valve YV1 is de-energized at this time, as shown in FIG. 3, the port A of the electromagnetic reversing valve YV1 is in communication with the port A1, and the port B of the electromagnetic reversing valve YV1 is in communication with the port B1, and the hydraulic oil flows in from the port A. The electromagnetic reversing valve YV1 flows out from the port A1 into the lower chamber of the hydraulic cylinder 1 of the pusher mechanism to push the piston upward. The hydraulic oil in the upper chamber of the hydraulic cylinder 1 of the pusher mechanism is returned to the electromagnetic reversing valve YV1 via the port B1, and then flows back from the port B through the relief valve F2 to the tank 100. If the electromagnetic reversing valve YV1 is energized at this time, the port A of the electromagnetic reversing valve is in communication with the port A2, the port B is in communication with the port B2, the hydraulic oil flows into the electromagnetic reversing valve YV1 via the port A, and flows into the lifting mechanism from the port A2. The upper chamber of the hydraulic cylinder 2 thus pushes the piston downward. The hydraulic oil in the lower chamber of the hydraulic cylinder 2 of the take-up mechanism flows back into the electromagnetic reversing valve YV1 via the port B2, and flows back from the port B through the relief valve F2 to the tank 100.

When the motor M1 is reversed, the hydraulic oil in the oil tank 100 is drawn into the hydraulic pump BP via the check valve C1, and then enters the port P2 of the valve assembly 200 through the check valve C2. If the electromagnetic reversing valve YV1 is de-energized at this time, as shown in FIG. 3, the port A of the electromagnetic reversing valve is in communication with the port A1, and the port B is connected to the port B1, the hydraulic oil flows from the port B into the electromagnetic reversing valve YV1. The port B1 flows out into the upper chamber of the hydraulic cylinder 1 of the pusher mechanism to push the piston downward. The hydraulic oil in the lower chamber of the hydraulic cylinder 1 of the pusher mechanism enters the electromagnetic reversing valve YV1 via the port A1, and flows back to the tank 100 from the port A via the relief valve F1. If the electromagnetic reversing valve YV1 is energized at this time, the port A of the electromagnetic reversing valve YV1 communicates with the port A2, the port B communicates with the port B2, and the hydraulic oil flows into the electromagnetic reversing valve YV1 via the port B, and flows into the material from the port B2. The lower chamber of the hydraulic cylinder 2 of the mechanism thereby pushes the piston upward. The hydraulic oil in the upper chamber of the hydraulic cylinder 2 of the lifting mechanism enters the electromagnetic reversing valve YV1 via the port A2, from Port A flows back into the tank 100 via the relief valve F1.

It can be seen that in the technical solution of the present invention, the moving direction of the piston in the hydraulic cylinder is associated with the output steering of the motor M1. It will be apparent to those skilled in the art that the direction of movement of the piston and the output steering of the motor M1 can also be reversed in the manner described above.

In the above illustrative embodiment, when the electromagnetic reversing valve YV1 is de-energized, the port A of the electromagnetic reversing valve YV1 is in communication with the port A1, and the port B of the electromagnetic reversing valve YV1 is in communication with the port B1; when the electromagnetic reversing valve YV1 When energized, port A of the electromagnetic reversing valve is in communication with port A2, and port B is in communication with port B2. In another alternative embodiment, the operational sequence of the electromagnetic reversing valve YV1 can also be reversed. For example, when the electromagnetic reversing valve YV1 is powered off, the port A of the electromagnetic reversing valve is in communication with the port A2, and the port B is connected to the port B2. When the electromagnetic reversing valve YV1 is energized, the port A of the electromagnetic reversing valve YV1 is in communication with the port A1.

Figure 4 shows only one specific embodiment of an electronic control module in accordance with the present invention. The electronic control module mainly includes an inverter controller 20, a power module P1, a PLC controller 40, and a control panel 30. The AC power supply of the power grid is connected to the input end of the variable frequency controller to supply power to the variable frequency controller. The variable frequency controller 20 can adapt the input power supply, that is, whether the input of 380V three-phase power or 220V two-phase power is applicable. For example, the variable frequency controller can be composed of a frequency converter and associated control circuits. The output of the variable frequency controller 20 is connected to the motor M1, and can detect the load current of the motor M1 in real time and control the output power of the motor M1, in particular, the rotational speed of the output shaft of the motor M1, thereby controlling the operation of the hydraulic pump BP. The variable frequency controller 20 is connected to the PLC controller 40 via a bus for data communication. M2 is a fan of the inverter controller 20 for cooling the inverter controller 20.

The power module P1 outputs a 24V DC voltage to supply power to the control panel 30 and the PLC controller 40, as well as the load 50 and the load 60. In FIG. 4, the load 50 can be considered to be the electromagnetic directional control valve shown in FIG. 3, and the load 60 is a signal indicator on the control panel 30. For user convenience, the control panel 30 can be a touch screen type control panel that is coupled to the PLC controller 40 for issuing various control commands thereto. For example, the control panel 30 can be designed with a human-machine interactive operation interface that facilitates user operation, facilitating the user to intuitively operate or display operational parameters.

The operation of the drive system according to the present invention will now be described with reference to Figs.

First of all, it should be pointed out that the pusher movement mode of the pusher mechanism includes forward and backward, wherein the forward movement of the pusher is divided into differential and normal motion. Lifting mechanism action package Including rising and falling. The action of the pusher is performed separately from the action of the picking mechanism.

When the garbage compactor starts to compress the garbage, the drive system is first activated, the PLC controller 40 controls the power module P1 to output a high frequency signal, and the motor M1 is reversed, and the electromagnetic reversing valve LV1 is turned off to cause the push head to retreat to the initial position. position.

When the inverter controller 20 detects that the load current of the motor M1 rises to a certain multiple of the rated current, for example, 1.5 times, it is considered that the push head is retracted to the last end, and the PLC controller 40 controls the power module P1 to output a low frequency signal and causes the motor to M1 is rotating forward, at this time, the electromagnetic reversing valve LV1 is still powered off, so that the pusher advances at a normal speed; after a certain period of operation, for example, 1 second, the PLC controller 40 controls the power module P1 to output a high frequency signal, and the head is differentially driven. Go forward, fast forward.

During the advancement process, if the load is encountered (ie, contact with garbage), the load current of the motor M1 rises, and when the inverter controller 20 detects that the load current reaches a certain multiple of the rated current, for example, 1.5 times, the PLC controller 40 The control power module P1 outputs a low frequency signal, and the push head changes to a normal speed forward (normal motion), and continues to compress the garbage;

When the inverter controller 20 detects that the load current of the motor M1 rises to a certain multiple of the rated current, for example, 2 times, it is considered that the push head has reached the foremost end, and the compression cannot be continued. At this time, the PLC controller 40 controls the power supply module P1 to stop outputting. The motor stops. Then, after a certain time, for example, 1 second, the PLC controller 40 controls the power module P1 to output a high frequency signal and inverts the motor M1, and the push head quickly retreats. When the push head returns to the initial position, the PLC controller 40 controls the power module P1. The output is stopped, the motor M1 is stopped, and the operating cycle of the pusher is completed.

Although only the operation of the pusher has been described above, it will be apparent to those skilled in the art that the same control mode is also applicable to the action of the picking mechanism.

During the operation of the pusher, if it is necessary to add garbage, firstly, the PLC controller 40 controls the electromagnetic reversing valve YV1 to be powered. At this time, the push head stops, the control motor M1 rotates forward, the lifting mechanism 2000 rises, and the motor M1 is controlled. Reversed, the feeding mechanism fell, and the dumping of garbage was completed.

According to different feeding mechanisms, the power module P1 outputs different frequencies to ensure that the garbage compactor runs smoothly. After the dumping of the garbage is completed, the control pusher is returned to the initial position when the garbage is started to be compressed; when the running cycle of the pusher is performed n times, or when the time reaches a predetermined time threshold, the garbage compactor is stopped. The run ends.

During operation, if an emergency situation occurs, the electromagnetic reversing valve YV1 is closed, and the output of the power module P1 is stopped. If the motor M1 is overloaded or the garbage compactor is abnormal during operation, the garbage compactor is stopped, and the electromagnetic exchange is turned off. To the valve YV1, the power module P1 output stops, the operation ends; if the motor M1 is overloaded, the operation ends, the overload is automatically reset after 1 second, and the garbage compactor can be started normally. When the garbage compactor is restarted, the low frequency signal is output through the power module P1, and the push head changes from a fast (differential) motion to a normal speed motion, and if the electrical load flow value is detected in a short time (less than the cycle time) The value rises to 2.2 times the rated current to 2.6 times the rated current, then it is determined that the garbage compactor is full. After at least 3 seconds, the full load indicator is on, for example, the indicator light 60 is on, the operation is over, and the start button end of the entire device is normally closed. If the device is disconnected, the entire device cannot be started, or the start button of the feeding mechanism is normally closed and cannot be started.

By adopting the technical scheme of the invention, the control can adopt 380V three-phase control, and can adopt 220V two-phase control, which solves different power supply specifications of different customers; the oil supply system composed of the hydraulic circuit uses a large flow and low pressure mode to satisfy The fast running requirement under no-load conditions; the hydraulic circuit uses few hydraulic components, and there is no throttle hydraulic component, which not only saves energy but also better controls the temperature of the hydraulic oil. The system adjusts the hydraulic pressure by adjusting the frequency and speed of the motor. Power; the required hydraulic power is generated by the power controlled by the inverter controller, which saves energy unlike the conventional system with a throttle valve; the electronic control module uses a variable frequency power module for controlling the motor completely as needed. The speed of the hydraulic oil can be controlled by controlling the speed of the motor; the operating speed of the lifting mechanism and the pusher mechanism is generated by different speeds of the motor and is regulated by different hydraulic oil flows controlled by the inverter controller; The variable frequency controller measures the current and voltage of the motor and controls the frequency and The flow curve controls the motor speed; in the conventional system, the steering of the motor is related to the phase sequence of the power supply. If the phase sequence is not correct, the direction of rotation of the motor may also be incorrect, and the user must adjust the phase sequence. In the system of the present invention, the variable frequency controller can automatically adjust the phase sequence of the power supply to make the direction of rotation of the motor correct; in the system of the present invention, the variable frequency controller switches the different modes of operation of the mechanisms; in the system of the present invention The display is used to display the operation of the compactor, the display includes a touch screen to adjust the operational settings of the relevant device; the signals from the various components and the variable frequency controller can be displayed on the display; when the compactor is unloaded, the control By detecting the load current, the position of the pusher can be calculated based on the detected current.

In addition, according to the drive system of the present invention, no pressure sensor is used at all, and the relevant load condition can be calculated simply by measuring the load current and/or the load voltage of the motor while the pusher is running.

In the driving system of the invention, due to the adoption of the electronic control module, the motor frequency conversion starts, the starting current is reduced, and the influence on the power grid is reduced; the motor noise is reduced, and the use occasion is wide; the frequency conversion controller has the precise current protection function, and can no longer Use fuses or fuses to provide automatic recovery protection according to actual conditions to prevent any overload conditions; combine control unit and frequency conversion module into one inverter controller to reduce control cabinet space, leaving more space for hydraulic system and more efficient The hydraulic circuit in the drive system is simplified, the hydraulic components are less, the heat generated by the hydraulic system is reduced, and the failure rate is less. During the feeding process, the position of the hopper is determined according to the current, and the uppermost and lowermost ends of the hopper are decelerated to reduce dust. And noise; using the frequency conversion module, real-time detection of current, adjust the frequency according to the actual situation, reduce energy consumption; after actual testing, the new control scheme compares the existing control system with energy saving by 30%.

In summary, the present invention provides a drive system for a garbage compactor, particularly a mobile garbage compactor, the drive system comprising:

An electronic control module for controlling the hydraulic circuit, the electronic control module comprising a variable frequency controller, the variable frequency controller being connected to the motor for monitoring a load current of the motor and frequency control of the motor Wherein the electronic control module controls the action of the hydraulic cylinder assembly via the hydraulic circuit based on a load current of the electric motor.

The basic idea of the invention is only schematically illustrated in the specification, and it will be apparent to those skilled in the art that the relevant components can be modified as needed. For example, the electromagnetic reversing valve can also be a three-position six-way valve, plus a gear that simultaneously stops supplying oil to the two hydraulic cylinders. In addition, other forms of commutation devices can also be employed in the present invention as long as the same functions are achieved. Alternatively, the PLC controller can be replaced by any other control circuit as long as the same function can be achieved.

Although specific embodiments of the invention are described in detail herein, they are merely for understanding They are given for the purpose of illustration and are not to be construed as limiting the scope of the invention. Various alternatives, modifications, and adaptations are conceivable without departing from the spirit and scope of the invention.

Claims

A drive system for a garbage compactor, in particular a mobile garbage compactor, the drive system comprising:

a hydraulic circuit coupled to the pusher mechanism hydraulic cylinder assembly and the picking mechanism hydraulic cylinder assembly of the refuse compactor to selectively drive one of the hydraulic cylinder assemblies, the hydraulic circuit including a hydraulic pump Driving an electric motor of the hydraulic pump, the load current of the electric motor being varied with an operating state of the hydraulic cylinder assembly;

An electronic control module for controlling the hydraulic circuit, the electronic control module comprising a variable frequency controller, the variable frequency controller being connected to the motor for monitoring a load current of the motor and frequency control of the motor Control, wherein the electronic control module controls the action of the hydraulic cylinder assembly via the hydraulic circuit based on a load current of the electric motor.
A drive system according to claim 1 wherein said hydraulic circuit includes an electromagnetic reversing valve and a hydraulic oil tank for storing hydraulic oil, said electromagnetic reversing valve and said pusher mechanism hydraulic cylinder assembly and said A picking mechanism hydraulic cylinder assembly is coupled to be controlled by the electronic control module to selectively energize an oil passage between one of the hydraulic cylinder assemblies and the hydraulic oil tank.
A drive system according to claim 1 or 2, wherein each of the hydraulic cylinder assemblies includes a hydraulic cylinder and a piston movable within the hydraulic cylinder, and a direction of movement of the piston of the driven hydraulic cylinder assembly depends on The output of the motor is turned.
The drive system of claim 3 wherein the speed of movement of the piston of the driven cylinder assembly is dependent on the output power of the motor.
A drive system according to claim 3 or 4, wherein said electronic control module is operative to determine an operating state of the driven hydraulic cylinder assembly based on the detected load current, such as the position of the piston within the hydraulic cylinder.
A drive system according to any one of the preceding claims, wherein the electronic control module controls the pressure and/or flow of hydraulic oil output by the hydraulic pump based on the detected load current to control the hydraulic cylinder assembly The speed of the action.
A drive system according to any one of the preceding claims, wherein the hydraulic circuit further comprises a one-way valve and/or overflow disposed in an oil passage between the electromagnetic directional control valve and the hydraulic oil tank valve.
A drive system according to any of the preceding claims, wherein said electronic control module comprises a touch screen control panel for displaying and setting parameters of said drive system thereon.
A drive system according to any of the preceding claims, wherein said electronic control module determines the amount of waste in said refuse compactor based on the load current of said electric motor.
A garbage compactor, in particular a mobile garbage compactor, comprising a pusher mechanism, a picking mechanism and a drive system according to any of the preceding claims.