JP2861562B2 - Single main pipe type centralized lubrication device and vehicle equipped with the lubrication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single main pipe type centralized lubrication system in which a distribution valve is connected to one main pipe and grease or the like measured by the distribution valve is lubricated to a lubricating point. The present invention mainly relates to vehicles related to construction work, such as mounted cranes and power shovels.

[0002]

2. Description of the Related Art Conventionally, a lubricating apparatus of this type and a vehicle equipped with the lubricating apparatus are known from Japanese Patent Application Laid-Open No. 1-190837, etc., and a key switch for starting and stopping the vehicle is turned on to perform construction work. The grease in the oil tank is pumped to one main pipe by the drive of the electric pump element at fixed time intervals by a command from the controller, and the lubrication points are connected to the lubrication points via the distribution valve connected to the main pipe. We are able to lubricate. Also, in general, when lubrication is completed at each lubricating point, the main pipe is opened to the oil tank side and depressurization is performed to release the pressure in order to avoid pressure build-up in the main pipe.

[0003]

However, in the above, since the power supply of the controller is turned on and off in conjunction with the key switch, it is only necessary that the key switch be turned off after the depressurization is completed. It is not necessary to know the operating state of the circulating device, nor is it necessary to know this.If the key switch is turned off during the lubrication operation in which depressurization has not been completed, the pressure inside the main pipe will remain. For a long time, in some cases, for days or months, it will be left as it is, and due to thermal expansion, the inside of the main pipe will become abnormally high pressure,
Problems such as breakage of the pump element and distribution valve, and separation of the soap base and greasy constituents of grease from the oil base, leaving only the grease base to the outside and the soap base remaining, impairing the lubrication function. There is a problem that adversely affects the main pipe and grease.

[0004] It is an object of the present invention to release the pressure regardless of the power supply whenever the power is turned off, to prevent the pressure from being left inside the main pipe, to reduce the load on the main pipe and to reduce the grease. It is an object of the present invention to provide a single main pipe centralized lubricating device capable of preventing deterioration of lubricating oil and the like and a vehicle provided with the lubricating device.

[0005]

Therefore, in order to achieve the above object, there is provided a single-pipe centralized lubricating device comprising an electric pump element 1 and an oil tank 2 connected to the suction side of the pump element 1. One main pipe 3 connected to the discharge side of the pump element 1, a distribution valve 4 connected to the main pipe 3, a depressurizing mechanism 5 for opening the main pipe 3 to the oil tank 2 side, and the pump A controller 6 for controlling the element 1 and the depressurizing mechanism 5 to perform lubrication to the main pipe 3 side and depressurization after the lubrication. 5 is provided with an initial pressure release command means 7 for outputting an operation command to release pressure.
The power supply circuit is provided with re-energizing means 10 for re-energizing the controller 6 from the battery 9 for a certain period of time after the power is turned off by turning off the power switch 8 to operate the initial pressure-reducing command means 7.

Further, in order to achieve the same object as described above, a vehicle provided with a single main pipe type centralized lubricating device, comprising an electric pump element 1 and an oil tank connected to the suction side of the pump element 1 2, one main pipe 3 connected to the discharge side of the pump element 1, a distribution valve 4 connected to the main pipe 3, a depressurizing mechanism 5 for opening the main pipe 3 to the oil tank 2 side, And a controller 6 for controlling the pump element 1 and the depressurizing mechanism 5 to perform lubrication to the main pipe 3 side and depressurization after the lubrication. An initial pressure release command means 7 for outputting an operation command to the mechanism 5 to release the pressure is provided.
Re-energizing means for re-energizing the controller 6 from the car battery 9 for a certain period of time after the power supply to the power supply circuit is turned off by turning off the vehicle start / stop key switch 8 to operate the initial pressure-reducing command means 7 10 were provided.

[0007]

Even if the power switch 8 or the key switch 8 is turned off at any time, the power is cut off by the re-energizing means 10 and then the controller 9 is re-energized from the battery 9 or the car battery 9 for a certain period of time. An operation command is output from the initial depressurizing command means 7 to the depressurizing mechanism 5, and depressurizing is performed. Thereby, it can be avoided that the main pipe 3 is left in a state in which the pressure is confined, the load on the main pipe 3 can be reduced, and the deterioration of the lubricating oil can be prevented.

[0008]

FIG. 1 shows a single-tube centralized lubricating apparatus according to the present invention applied to a vehicle. The lubricating apparatus is driven by a forward / reverse motor M and pressurizes a piston and a cylinder mechanism. An electric pump element 1 having a mechanism, an oil tank 2 connected to the suction side of the pump element 1 for storing lubricating oil such as grease, and a motor M connected to the discharge side of the pump element 1
One main pipe 3 for flowing lubricating oil, which is pressure-fed from the oil tank 2 through the pump element 1 by the forward rotation of the oil toward the end thereof,
A plurality of distribution valves 4 connected in parallel to the main pipe 3 to supply a predetermined amount of lubrication to each lubrication point 40, and a switching operation is performed via a cam mechanism or the like by reverse rotation of the motor M, and the main pipe 3 is connected to an oil tank. 2
And a motor driving means 60 for controlling the pump element 1 and the decompression mechanism 5 by starting / stopping and rotating the motor M forward / reversely. A controller 6 is provided for performing lubrication to the side and depressurizing after the lubrication by the reverse rotation of the motor M.

The controller 6 uses a battery 9 (hereinafter simply referred to as a car battery) which is shared with a car battery serving as a power source for an electric system in the vehicle as a power source,
It is operated by turning on a power switch 8 (hereinafter simply referred to as a key switch) composed of a key switch for starting and stopping the vehicle. The microprocessor is provided with a microprocessor or the like. The accumulated actual operation time is accumulated and stored, and a greasing interval accumulation timer 61 that counts a predetermined greasing interval. A forward rotation command is transmitted from the motor driving unit 60 to the motor M at each predetermined greasing interval. Greasing command means 62 for giving a greasing operation
And a pressure-reducing command means 63 for giving a reverse rotation command from the motor driving means 60 to the motor M after the greasing operation to perform a pressure-reducing operation. In addition, a pressure detector PS for detecting the pressure of the main pipe 3 at the discharge port of the pump element 1 is input to the greasing command means 62, and its operation will be described later.

With the above arrangement, the controller 6 is provided with the initial pressure-reducing command means 7 for outputting a reverse rotation command from the motor driving means 60 to the motor M when the power is turned on by the key switch 8 to release the pressure. After the power supply is turned off by turning off the key switch 8,
A certain period of time from the car battery 9 to the controller 6
And a re-energizing means 10 for operating the initial pressure-reducing command means 7 by re-energizing.

The initial depressurization command means 7 actually outputs a reverse rotation command to the motor M via the motor drive means 60 for a predetermined time (for example, 5 seconds). The same processing as that of the decompression command means 63 executed later is performed. Both of these means 7 and 63 are shared by one processing routine, and are inserted in the first stage of the program started by turning on the power.

The re-energizing means 10 is, specifically, shown in FIG.
As shown in FIG. 2, a two-stage monostable multivibrator F1 or F2 (hereinafter referred to as one shot) connected to a power supply line of the car battery 9 via a three-terminal regulator RV, an AND gate AND and a re-energizing relay L1 are used. As shown in FIG. 3, a falling signal accompanying the turning-off operation of the key switch 8 is taken into its trigger input A1, and a time determined by a time constant circuit including the resistor R1 and the capacitor C1 (about 33 to 70 seconds). Only high level "H"
The output Q1 of the first one-shot F1 and the inverted output QC1 of the first one-shot F1 are taken into the trigger input A2, and the time (about 3 to 10 seconds) determined by the time constant circuit composed of the resistor R2 and the capacitor C2 ) And the inverted output QC2 of the second one-shot F2 that maintains the low level "L" only, and after 3 to 10 seconds elapse after the key switch 8 is turned off, re-energize the relay for about 30 to 60 seconds. L1 is excited. And
While the re-energizing relay L1 is energized, it is synchronized with the turning on and off of the key switch 8, and the re-energizing contact L1- connected in parallel with the contact L2-a of the operating relay L2 opened by the turning-off operation of the switch 8. Close a, controller 6
The controller 6 is operated by closing the current supply line to the controller 6. Although the actual reverse rotation time of the motor M is about 5 seconds, the re-energization time is set to 3 in order to secure the startup time required for initialization and the like in the microprocessor section.
It is 0 to 60 seconds.

In this way, as shown in FIG. 4, when the power is turned on by turning on the key switch 8, the pressure is first released. Thereafter, the motor M is stopped until the time integrated by the greasing interval integration timer 61 reaches the time corresponding to the greasing interval and the time is up. When the time is up, the greasing operation is started. . As shown in FIG. 5, the lubrication operation is performed by rotating the motor M in the forward direction to pump the lubricating oil to the main pipe 3 until the value detected by the pressure detector PS disposed immediately after the pump element 1 reaches a predetermined value. And pressure detector P
When the detection value at S reaches a predetermined value, the motor M is temporarily stopped, and then is rotated forward again to stop the motor M when the detection value at the pressure detector PS reaches the predetermined value again. And This is because the pressure at the end of the main pipe 3 is increased without increasing or decreasing the pressure in the main pipe 3 while maintaining a pressurized state within a certain range. Is to raise the value to be able to operate. When the greasing of one cycle is completed, the program returns to the beginning to depressurize, and the greasing interval until the next cycle is integrated.

Even if the key switch 8 is turned off at any time during the above-described series of operations, after the power is turned off, 30 to 6
For about 0 seconds. Since the controller 6 is re-energized and depressurized, it is possible to prevent the main pipe 3 from being left with pressure remaining therein, thereby reducing the burden on the main pipe 3 and deteriorating the lubricating oil. Thus, the pump element 1 and the distribution valve 4 can be prevented from being destroyed, and the lubrication performance can be prevented from deteriorating. In addition, even when the power is turned on, the greasing operation is performed after the depressurization is performed, so that the safety can be further improved.

Although the above embodiment has been described as applied to a vehicle, it is needless to say that the present invention may be applied to a lubrication device installed in a factory facility or the like.

[0016]

As described above, according to the single main pipe type centralized lubricating device or the vehicle equipped with the lubricating device according to the present invention, even if the power switch 8 or the key switch 8 is turned off at any time,
Since the battery 9 or the car battery 9 is re-energized and depressurized, the pressure on the main pipe 3 can be prevented from being left in a state where the pressure is confined, the burden on the main pipe 3 can be reduced, and the deterioration of the lubricating oil can be reduced. This can prevent the pump element 1 and the distribution valve 4 from being destroyed beforehand, and can prevent a decrease in lubrication performance.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a single main pipe centralized lubrication device according to the present invention applied to a vehicle.

FIG. 2 is an electric circuit diagram of the re-energizing means.

FIG. 3 is a time chart of the circuit of FIG. 2;

FIG. 4 is a flowchart showing the operation of the controller.

FIG. 5 is an explanatory diagram illustrating the lubrication operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump element 2 Oil tank 3 Main pipe 4 Distribution valve 5 Depressurization mechanism 6 Controller 7 Initial depressurization command means 8 Power switch (key switch) 9 Battery (car battery) 10 Re-energizing means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 62-149699 (JP, U) Japanese Utility Model Showa 59-25797 (JP, U) (58) Fields surveyed (Int.Cl. ⁶ , DB name) F16N 7/38

Claims (2)

(57) [Claims] An electric pump element and a pump element.
, An oil tank 2 connected to the suction side of the pump element 1, one main pipe 3 connected to the discharge side of the pump element 1, a distribution valve 4 connected to the main pipe 3, and opening the main pipe 3 to the oil tank 2 side. Single main pipe type centralized lubrication having a depressurizing mechanism 5 for controlling the pump element 1 and the depressurizing mechanism 5 to perform lubrication to the main pipe 3 side and depressurization after the lubrication. In the apparatus, the controller 6 is provided with an initial pressure-reducing command means 7 for outputting an operation command to the pressure-releasing mechanism 5 when the power is turned on to release pressure, and a power switch of the power switch 8 A single main pipe type centralized lubrication system comprising a re-energizing means 10 for re-energizing the controller 6 from the battery 9 for a certain period of time after the power is shut off by the OFF operation to operate the initial pressure-reducing command means 7. apparatus. 2. An electric pump element 1 and said pump element 1.
, An oil tank 2 connected to the suction side of the pump element 1, one main pipe 3 connected to the discharge side of the pump element 1, a distribution valve 4 connected to the main pipe 3, and opening the main pipe 3 to the oil tank 2 side. Single main pipe type centralized lubrication having a depressurizing mechanism 5 for controlling the pump element 1 and the depressurizing mechanism 5 to perform lubrication to the main pipe 3 side and depressurization after the lubrication. In the vehicle provided with the device, the controller 6 is provided with an initial pressure-reducing command means 7 for outputting an operation command to the pressure-reducing mechanism 5 by turning on a power source to perform pressure reduction.
Re-energizing means for re-energizing the controller 6 from the car battery 9 for a certain period of time after the power supply to the power supply circuit is turned off by turning off the vehicle start / stop key switch 8 to operate the initial pressure-reducing command means 7 A vehicle provided with a single main pipe type centralized lubrication device, wherein the centralized lubrication device is provided with the lubrication device.