JPH01190837A - Automatic greasing device - Google Patents

Abstract

PURPOSE:To let a device contribute much to saving in labor as well as to improve operating efficiency by providing a grease pump equipped with an accumulator grease tank for the upper turning body of a construction machine, letting runs of greasing piping located at specified positions be communicated with each other, and thereby letting grease be automatically fed. CONSTITUTION:A grease pump 27 equipped with an accumulator grease tank 28 is provided for the upper turning body 3 of a construction machine. Then, its discharge opening is communicated with a master distributing valve 29 and sub-distributing valves 30 and 31, and runs of grease feed piping are communicated with each other, which are arranged to specified positions such as a turning bearing 2, the pin connecting sections 14 through 24 of operating attachments and the like from flow dividing openings 32 through 42 provided for each distributing valve 29 through 31. And when the accumulated operating time of the engine of the construction machine reaches a set time, an electric motor 26 is actuated so as to let the grease pump 27 be actuated so that grease is automatically fed to each position based on the control of a controller 46.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a conventional technology relating to an automatic lubrication system for construction machinery. FIG. 2 is a partially cutaway side view of a conventional hydraulic excavator. In the figure, 1 is an undercarriage, 2 is a swing bearing, and 3
is the upper rotating body, 4 is the front frame of the upper rotating body 3,
5 is a work attachment attached to the front frame 4, 6 is a boom of the work attachments 5, 7 is an arm, 8 is a packet which is a work tool, 9 is a bushing rod, 10 is an idler plate, 11 is a boom cylinder, 12 is a Arm cylinder, 13, packet cylinder, 1
4.15, 16, 17, 18, 19, 20, 21.22
, 23 and 24 are pin joints corresponding to the joints of the working attachment 5. Therefore, in a hydraulic excavator among construction machines, the upper rotating body 3 is installed on the lower traveling body 1 via the swing bearing 2, and the above-mentioned A boom 6 is attached to the front part of the upper revolving structure 3, and the arms 7 and packets 8 are sequentially connected to the tip of the boom 6 by pin connection, and the boom 6
, arm 7 and packet 8 respectively to boom cylinder 1
．． Arm cylinder 2. It is pivotably supported by a packet cylinder 13 so as to be rotatable in the vertical direction or in the front-back direction. Then, the slewing bearing 2 and the pin coupling portion 14. The lubrication of ~,24 is
At specified regular intervals, a grease gun or the like is used to lubricate each lubrication port (not shown or reference numeral) of each of the pin joints 14, . . . , 24.

Problem to be Solved by the Invention To perform centralized lubrication (a method in which multiple pin joints are supplied with grease from a single lubrication greasing port) for each pin joint of a work attachment for a hydraulic excavator. has been considered in various ways. However, since the greasing port is present over the entire length of the working attachment, it has been difficult to implement complete centralized lubrication. For this purpose, a plurality of pin joints are divided into several groups, and their greasing ports are lubricated at specified regular intervals using a grease gun or the like. The packet, bushing rod, etc. at the tip of the work attachment were quite far from the driver's seat, and the driver had to get out of the vehicle every time he refueled the vehicle. Furthermore, since the number of times of greasing is large, it is a hassle and reduces work efficiency.

This invention solves the above-mentioned problems and automatically operates an electric grease pump when the engine of a construction machine is operated for a set cumulative time, supplying power to the slewing bearing and each pin joint of the work attachment. The purpose of the present invention is to provide an automatic greasing device that performs greasing.

Means for Solving the Problems The means of the present invention taken to solve the above problems are as follows: (a) An electric grease pump equipped with an accumulating grease tank is provided on the upper revolving body of a construction machine, and the grease pump discharge port and a parent distribution valve, one or more child distribution valves are sequentially connected in series on the downstream side of the parent distribution valve, and the parent distribution valve and the child distribution valve have respective branch ports;
Connect one of the greasing ports provided on the working attachment pin connection part of the slewing bearing 1 with a greasing pipe, and connect the battery installed in the construction machine and the motor of the electric grease pump mentioned above. A controller is interposed in the communicating electrical circuit; 2. When the engine is operated for a set cumulative time, the controller enables rotation of the grease pump motor; When the greasing of the parts is completed, the rotation of the grease pump electric motor can be stopped by a switch signal output from the parent distribution valve, and e. The grease pump operation stroke can be repeated after the above set cumulative time elapses. It was configured as follows.

Function B: When the engine installed in the construction machine is operated for the set cumulative time, the controller's timer function causes the grease pump electric motor to rotate.

As a result, the grease pump rotates, so that the grease filled in the pressure accumulating grease tank is supplied from the grease pump to the child distribution valve via the parent distribution valve. At the same time, a swing bearing is installed from each of the branch ports of the parent distribution valve and the child distribution valve.

Since grease is delivered to the greasing port of the pin joint for the work attachment, all the pin joints are automatically lubricated.

B. When the greasing described in item A above is completed, the limit switch provided in the parent distribution valve operates, and the switch signal is output to the controller.

Therefore, according to a command from the controller, Greasebow 6
= At the same time as the pump motor stops rotating, the grease pump also stops rotating.

C. When the construction machine performs work while the rotation of the grease pump is stopped as described in item (b) above, and the engine reaches the set cumulative time, the grease pump operation process as in item (a) and (b) above is repeated. It will be done.

EMBODIMENTS The automatic lubrication device according to the present invention will be explained in detail below with reference to the drawings. FIG. 1 is a lubrication circuit diagram of an automatic lubrication device according to the present invention. In the figure, each component of the hydraulic excavator is given the same reference numeral as that of the conventional hydraulic excavator. 25 is an electric grease pump, 26 is an electric motor of the electric grease pump 25, 27 is a grease pump, 2
8 is a pressure accumulation type grease tank, 29 is a parent distribution valve, 30, 3
1 are child distribution valves, 32. ~, 42 is the parent distribution valve 29
．． 43 is the engine mounted on the hydraulic excavator, 44 is the battery, 45 is the branch port of the child distribution valve 30 and 31, respectively.
46 is a key switch, 46 is a controller, 47 is an automatic lubrication/manual lubrication changeover switch, 48 is a display device 49 for lubrication and when an abnormality occurs, and is a limit switch provided on the main distribution valve 29.

Next, the configuration of the automatic lubrication device according to the present invention will be explained with reference to FIG. An electric grease pump 25 equipped with an accumulating grease tank 28 is installed on the upper revolving body 3 of the hydraulic excavator, and the discharge port of the grease pump 27 is communicated with two main distribution valves. Sequential distribution valves 30, 31 were connected in series. Then, the two main distribution valves and the child distribution valves 30, 31 have their respective branch ports 32° to 42, and the pin connecting portion 14 for the working attachment 5 of the slewing bearing 21. -, 24 were connected to each other through a greasing pipe (not shown). On the other hand, a controller 46 is interposed in an electric line that communicates a battery 44 provided in the hydraulic excavator with the electric motor 26 of the electric grease pump 25. Then, when the engine 43 is operated for a set cumulative time, the controller 46 enables the electric motor 26 for the grease pump 27 to rotate. Furthermore, a parent distribution valve 29 and a child distribution valve 30
．． When the greasing from 31 to each pin joint is completed, the rotation of the electric motor 26 for the grease pump 27 can be stopped by a switch signal output from four limit switches provided in the two parent distribution valves. At the same time, the operation process of the gripping pump 12 after the set cumulative time has elapsed is configured to be repeatable.

Next, the functions of the automatic lubrication device according to the present invention will be described. Turn on the key switch 45 and selector switch 4.
Switch 7 to automatic lubrication.

When the engine 43 is operated for a set cumulative time, the electric motor 26 for the grease pump 27 is rotated by the timer function of the controller 46. As a result, the grease pump 27 rotates, so that the grease filled in the pressure accumulating grease tank 28 is supplied from the grease pump 27 to the child distribution valves 30 and 31 via the parent distribution valve 29. At the same time, the parent distribution valve 29 and the child distribution valve 30
Diversion ports 32. . . , 42 feed grease to the greasing ports of the pin coupling portions 14 to 24 for the working attachment 5 of the swivel bearing 21, so that the swivel bearing 2 and the pin coupling portion 14. ~24 are all automatically lubricated. When the above-mentioned greasing is completed, the four limit switches provided in the two parent distribution valves operate, and the switch signals are output to the controller 46. When the rotation of the electric motor 26 stops, the rotation of the grease pump 27 also stops.In this way, when the hydraulic excavator works while the rotation of the grease pump 27 is stopped, and the engine 43 reaches the set cumulative time, The operation stroke of the grease pump 27 as described above is repeated again. In addition, pressure accumulation type grease tank 2
When the grease in the 8 is consumed and becomes empty, or when a grease clogging occurs in the middle of the greasing pipe, a signal output from the controller 46 causes the display device 48 to indicate the above abnormality. A warning lamp etc. will be displayed. Further, when the hydraulic excavator has not been used for a long time, the selector switch 47 can be switched to the manual greasing side to perform manual greasing as appropriate.

Effects of the Invention Since the greasing port in the swing bearing of a hydraulic excavator or the pin joint for a work attachment exists over the entire length of the work attachment from the upper revolving body thereof, it has been difficult to implement complete centralized lubrication. For this purpose, a plurality of pin joints are divided into several cruises, and their greasing ports are refueled at specified regular intervals using a fleece gun or the like. The packet, bushing rod, etc. at the tip of the work attachment were quite far from the driver's seat, and the driver had to get out of the vehicle every time he refueled the vehicle. Furthermore, since the number of times of greasing is large, it is a hassle and reduces work efficiency.

However, in the automatic greasing device according to the present invention, when the engine installed in the construction machine is operated for a set cumulative time, the electric grease pump is activated by the timer function of the controller, and the main distribution valve is activated.

Grease is automatically supplied to the greasing port of the working attachment pin joint portion of the swing bearing 1 through the subsidiary distribution valve. Then, when the above greasing is completed, the electric grease pump can be stopped by a switch signal output from the parent distribution valve, and the grease pump rotation operation process is automatically repeated after the set cumulative time has elapsed. Now you can do it.

Therefore, the automatic lubrication device according to the present invention can completely automatically lubricate the slewing bearing 2 work attachment pin connection portion of the construction machine, thereby saving the driver's labor and improving the work efficiency of the construction machine. let

[Brief explanation of the drawing]

FIG. 1 is a greasing circuit diagram of an automatic greasing device according to the present invention;
FIG. 2 is a partially cutaway side view of a conventional excavator. 2 −−−−−−−−−−−−−−−−−−−−−−−
---------1 Swivel bearing 3 ------1111------------------1 Upper rotating body 5 ----- −−−−−−−−−−−−−−−−−
−−−−−−−−1 Work attachment 14, ~. 2
4 ---1----- Pin connecting part 25 ---------
−−−−−−−−−−−−−−−−−−−−− Electric grease pump 2' 6 −−−−−−−−−−−−−−
−−−−−−−−−−−−1 Electric motor 27 −−−−−
−−1−−−−−−−−−−−−==− Grease pump 28 −−−−−−−−−−−−−−−−−−−−−−
−−1−−− Pressure accumulation type grease tank 29 −−−−−
−−−−−−−−−−−−−−−−−−−1 Main distribution valve 3
0, 31 -1---------- Child distribution valve 32
, ~. 42 ---------1 Diversion port 43 ---
−−1−−−−−−−−−−−−−−−−−−−−1
Engine 44 −−−−−−−−−−−−−−−−−
−−−−−−−−− Battery 46 −−−−−−−−−−−−−−−−−−−−−−−−−1−−−−−1−−−−− −−−−−−−−−−−
--Limit switch or more

Claims (1)

[Claims] An upper rotating body is provided on the lower traveling body via a swing bearing, a boom is attached to the front part of the upper rotating body, and an arm and a working tool are sequentially connected to the tip of the boom by pin connection, and the boom, In a construction machine in which an arm and a working tool are pivotably supported by hydraulic cylinders so as to be able to rotate vertically or longitudinally, an electric grease pump equipped with a pressure accumulating grease tank is provided on the upper rotating body, and the grease pump discharge port is provided. and a parent distribution valve, one or more child distribution valves are sequentially connected in series on the downstream side of the parent distribution valve, and each of the branch ports of the parent distribution valve and the child distribution valve, and the swing bearing; Connect the greasing port provided on the boom, arm, or work tool with greasing piping.
On the other hand, a controller is interposed in the electrical circuit connecting the battery provided in the construction machine and the electric motor of the electric grease pump, and when the engine is operated for a set cumulative time, the controller rotates the electric motor for the grease pump. Furthermore, when the main distribution valve and the child distribution valve complete greasing to each pin joint part, the rotation of the grease pump electric motor can be stopped by a switch signal output from the main distribution valve, and the above-mentioned An automatic lubrication device characterized in that the grease pump rotation operation stroke can be repeated after a set cumulative time has elapsed.