JPH0577586U - Power saving device for hydraulic working equipment - Google Patents

Abstract

(57) [Summary] [Purpose] In hydraulic working equipment equipped with various electrical components,
(EN) Provided is a power saving device which suppresses wasteful consumption of a battery that supplies electric power to these electrical components. A power-saving device 40 detects a discharge pressure that detects that the discharge pressure of the hydraulic pumps 21 and 24 exceeds a predetermined pressure on an oil passage L1 that connects the discharge ports of the hydraulic pumps 21 and 24 to the electromagnetic switching valve 25. The detection means 41 is provided. Then, the power supply control means 42, 43 are provided, and when the discharge pressure detection means 41 detects that the discharge pressure of the hydraulic pumps 21, 24 exceeds a predetermined pressure, the power supply control means 42, 43 is supplied from the battery B. The power supply to the electrical components 25 to 28 is allowed, and when it is not detected that the predetermined pressure is exceeded, the power supply is stopped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hydraulic operating device in which the supply of hydraulic oil is controlled by electrically operating electrical components, and further, to reduce waste of battery power in electrical components attached to the hydraulic operating device. Regarding power devices.

[0002]

[Prior Art]

 The supply of hydraulic oil discharged from a hydraulic pump is often controlled by an electromagnetic switching valve in hydraulic equipment such as booms that move up and down and expand and contract. In addition, when the boom is hoisted and retracted, the stability of the vehicle body that supports it is impaired, so an electric control device such as a moment limiter that limits the operating range of the boom is often installed. A detector that electrically detects the hoisting angle and extension of the boom and that electrically detects the operation of the operating device that is operated to indicate the operation of the boom is also installed. Then, power is supplied to these electrical components by using the battery as a power source.

[0003]

[Problems to be solved by the device]

 However, in the past, even when the hydraulic working device was not operated, electric power was constantly supplied from the battery to each electrical component, so the amount of power consumed by the battery was large, and charging was required in a short time. There was a problem that it was difficult to work over time.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a power saving device for a hydraulic working device capable of suppressing power consumption in a battery as much as possible. ..

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the power saving device of the present invention detects the discharge pressure of the hydraulic pump, which detects that the discharge pressure of the hydraulic pump exceeds a predetermined pressure, on the oil passage connecting from the discharge port of the hydraulic pump to the electromagnetic switching valve. Means are provided. Then, a power supply control means is provided, and when the discharge pressure detection means detects that the discharge pressure of the hydraulic pump exceeds a predetermined pressure, the power supply control means allows the power supply from the battery to the electrical components. The power supply is stopped when it is not detected that the pressure exceeds the predetermined pressure.

[0006]

[Action]

 According to such a power saving device, when the hydraulic pump operates and the discharge pressure thereof exceeds the predetermined pressure, the power supply control means allows the power supply from the battery to the electrical equipment. Therefore, it is possible to operate the hydraulic working device by operating the electrical equipment such as the electromagnetic switching valve. On the other hand, when the hydraulic pump does not operate and the discharge pressure does not rise, the power supply control means stops the power supply from the battery to the electric components. Therefore, it is possible to minimize the power consumption of the battery when the hydraulic working device is not in operation.

[0007]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows an aerial work vehicle (hydraulic work device) equipped with a power saving device according to the present invention. A swivel base 12 capable of horizontally swiveling with respect to the car body 11 is attached to the rear part of the car body 11 of the aerial work vehicle 10. The swivel base 12 has a telescope-like telescopic motion on the upper part thereof. The boom 13 configured as shown in FIG. The turning operation of the turntable 12 is performed by the operation of the hydraulic turning motor 14 built in the vehicle body 11. Further, the hoisting / extending / contracting operation of the boom 13 is performed by the operation of a hydraulic hoisting cylinder 15 mounted between the swivel base 12 and the boom 13 and a hydraulic telescopic cylinder 16 built in the boom 13. Further, a workbench 17 is horizontally attached to the tip of the boom 13, and an operator can board the workbench 17.

By the way, the hydraulic oil supplied to each of the hydraulic actuators 14 to 16 is discharged from a main hydraulic pump 21 mounted on the front portion of the vehicle body 11, and the main hydraulic pump 21 is also attached to the front portion of the vehicle body 11. It is driven by the work engine 22 mounted on the vehicle. However, an emergency hydraulic pump 24 intended to be driven by the electric motor 23 for a short time is also mounted so that at least the workbench 17 can be lowered to the ground when the work engine 22 is out of order. There is. Then, in the aerial work vehicle 10, the hydraulic oil control for supplying the hydraulic oil discharged from the main hydraulic pump 21 and the emergency hydraulic pump 24 to each of the hydraulic actuators 14 to 16 while controlling the flow direction and flow rate thereof. A valve unit (electrical component) 25 is attached to the side surface of the swivel base 12. The hydraulic oil control valve unit 25 is composed of a group of electromagnetic switching valves (not shown), and is based on an operation signal (electrical signal) output from an operation unit 26 attached to the workbench 17. Switching control is performed. A moment limiter (electrical component) 27 is attached to a side surface of the swivel base 12 so that the vehicle body 11 does not become unstable due to the operation of the boom 13 or the like. The moment limiter 27 is a device that restricts the operation of the boom 13 or the like in order to prevent the moment acting on the boom 13 from becoming excessive. To calculate the moment actually acting on the boom 13, the moment limiter 27 A boom operation detector (electrical component) 28, ... The operation signal from the operation unit 26 is input to the hydraulic oil control valve unit 25 after the moment limiter 27 judges whether the operation is appropriate (operation to the stable side or operation to the unstable side).

FIG. 2 shows the hydraulic pressure supply circuit and the electric power supply circuit for electric components described above. Electric power for operation is supplied from the battery B to the work engine 22, the electric motor 23, the operation unit 26, the moment limiter 27, and the various detectors 28. However, if the electric power is constantly supplied even when the work is not performed, the battery B is consumed quickly. Therefore, the aerial work vehicle 10 is equipped with the power saving device. The power saving device 40 includes a hydraulic switch 41, a power saving controller 42, and a power supply controller 43. The power saving controller 42 and the power supply regulator 43 correspond to the "power supply control means" in the claims. The hydraulic switch 41 is configured such that the hydraulic pressure in the hydraulic line L1 connected from the outlets of the main hydraulic pump 21 and the emergency hydraulic pump 24 to the hydraulic oil control valve unit 25 is at a predetermined pressure (for example, the main hydraulic pump 21 or the emergency hydraulic pump 24). When the discharge pressure exceeds the lower limit of the discharge pressure during normal operation), this is detected and a hydraulic pressure detection signal (electrical signal) is output to the power saving controller 42. When the hydraulic pressure detection signal is input, the power saving controller 42 outputs a restriction release signal (electrical signal) to the power supply restriction device 43. On the other hand, when the oil pressure detection signal is not input, the output of the restriction release signal is stopped. The power supply regulator 43 is composed of a relay switch, and when the regulation release signal is input, the coil is excited by the signal, so that the battery B, the operation unit 26, the moment limiter 27, and various detectors 28 are connected. An electric line L2 connecting between the electric components is connected to allow electric power supply to those electric components. On the other hand, when the deregulation signal is not input, the excitation of the coil is released to cut off the electric line L 2 and stop the electric power supply to the electric component.

When the main hydraulic pump 21 or the emergency hydraulic pump 24 operates and the hydraulic pressure exceeding the predetermined pressure rises in the hydraulic line L1, the power saving device 40 configured as described above supplies the electric power of the battery B. It is supplied to each electrical component (25 to 28) to enable operation control of the boom 13 and the like based on the operation of the operation unit 26 and safety assurance by the moment limiter 27. Then, when the main hydraulic pump 21 or the emergency hydraulic pump 24 does not operate and the hydraulic line L1 does not have hydraulic pressure, the battery B is disconnected from each of the electrical components (25 to 28). Therefore, for example, in order to suppress the fuel consumption of the work engine 22, the work engine 17 is moved to an arbitrary high place, and then the work engine 22 is stopped until it is moved next. It is possible to prevent wasteful consumption of the battery B in the above, and it is possible to perform high-altitude work for a long time without charging midway.

In the above embodiment, the aerial work vehicle has been described as an example, but the hydraulic working device on which the power saving device according to the present invention should be mounted is not limited to this.

[0012]

[Effect of the device]

 As described above, when the power saving device of the present invention is used, the electric power of the battery is not supplied to the electric components for controlling the operation of the hydraulic working device while the hydraulic working device is not operated, so that the battery is wasted during that time. It is possible to prevent unnecessary consumption. Therefore, it is possible to work for a long time by the hydraulic working device, which is also effective for improving working efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view of an aerial work vehicle equipped with a power saving device according to the present invention.

FIG. 2 is a configuration diagram of the power saving device.

[Explanation of symbols]

 13 boom 21 main hydraulic pump 24 emergency hydraulic pump 25 hydraulic control valve (electrical equipment) 26 operation unit (electrical equipment) 27 moment limiter (electrical equipment) 28 boom operation detector (electrical equipment) 40 power saving device 41 hydraulic switch ( Discharge pressure detection means) 42 Power saving controller (power supply control means) B Battery

Claims (1)

[Scope of utility model registration request] 1. A hydraulic working device that operates by receiving the supply of hydraulic oil discharged from a hydraulic pump, an electromagnetic switching valve that controls the supply of hydraulic oil to the hydraulic working device by receiving the supply of electric power from a battery, and the like. A power-saving device for a hydraulic working device including electrical components relating to operation control of the hydraulic working device, the power saving device being mounted on an oil passage connecting from the discharge port of the hydraulic pump to the electromagnetic switching valve, wherein the discharge pressure of the hydraulic pump is Discharge pressure detection means for detecting that the discharge pressure of the hydraulic pump exceeds a predetermined pressure, and when the discharge pressure detection means detects that the discharge pressure of the hydraulic pump exceeds a predetermined pressure, power is supplied from the battery to the electrical component. And a power supply control means for stopping the power supply from the battery to the electric component when it is not detected that the predetermined pressure is exceeded. Saving device for a hydraulic working device, characterized and.