JPH055359Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] This invention relates to an automatic lubrication device that automatically supplies lubricating oil (grease) to pivot parts of construction machinery, equipment, etc. [Prior Art] In construction machines and equipment machines having such a pivot part, it is necessary to periodically lubricate the pivot part to maintain the machine. Normally, the above-mentioned greasing timing is managed based on the operating time of the machine using a machine (vehicle body) service meter, etc., and the necessary amount of greasing is applied with a grease gun to the pivot part that reaches the greasing time. However, in recent years, in order to eliminate the trouble of managing the timing of lubrication and the trouble of manually replenishing the oil each time with a grease gun, containers containing the lubricating oil and containers containing the lubricating oil have been introduced. The machine (vehicle body) itself is equipped with a greasing pump or the like that pumps out the lubricating oil by electric or air drive and supplies it to the relevant pivot part. Automatic lubrication devices that automatically drive the motors and the like have also come into common use. [Problems to be solved by the invention] In view of the above-mentioned lubricating of the pivot part, 1. The amount of lubricant retained in the pivot part depends on the width of the bushing, the diameter of the pin, the shape of the groove in the bushing, etc. The amount of lubrication required for each pivot portion is not constant because it also differs depending on the type of bearing, such as a needle bearing or a roller bearing. 2 The amount of lubricant retained in each pivot part, the magnitude of the load on each pivot part, and the frequency of use depending on the environment in which it is placed differs for each pivot part.
The required lubrication time intervals at each of these pivot points are also not constant. Normally, it is necessary to lubricate each pivot portion in an appropriate amount at appropriate time intervals to meet the different conditions. However, with the above-mentioned conventional automatic lubrication device, a fixed amount of lubrication is carried out at a fixed time interval to all the pivot parts to be greased, regardless of the various conditions for each pivot part. For example, if these time intervals and lubrication amounts are set for the pivot part selected for the shortest lubrication time interval or the pivot part that requires the largest amount of lubrication, then There is also a lot of waste, such as when more than necessary amount of greasing is performed at an unnecessarily short time interval. Such waste also causes contamination around the pivot part. Incidentally, if the above-mentioned time intervals and lubrication amounts are set for a pivot part selected for the intermediate or longest time interval, or for a pivot part that requires an intermediate or minimum lubrication amount, the necessary amount of lubricating oil will not be retained. Pivot parts may also come out, which could lead to machine failure or accidents. Of course, settings in this manner must be avoided. [Means for solving the problem] In this invention, the lubricating oil supplied from the lubricating oil container and the greasing pump described above is selectively supplied to each of the pivot parts described above. A switching valve for switching lubrication, a timing means for counting the cumulative operating time of the machine, and the required lubrication time interval and amount of lubrication for each pivot part of the machine. an input means for setting and inputting information, a memory for registering and storing the input information regarding the lubrication time interval and lubrication amount for each pivot section, and a lubrication method for each pivot section registered in the memory. The greasing timing for each pivot portion is determined based on the time interval information and the timing information by the above-mentioned timing means, and each time the timing information reaches the greasing timing for any pivot portion,
Each of the machines is equipped with a control means for opening the switching valve corresponding to the pivot section and driving the greasing pump in accordance with the amount of grease registered in the memory of the pivot section. Achieve automatic lubrication for each pivot. Note that the input means and memory may be set offline for the device, and the memory in which the necessary information for each pivot part is registered is electrically connected to the control means before the machine starts operating (initial operation). All that is required is a form in which they can be connected. [Operation] The optimum lubrication time interval and the optimum lubrication amount for each pivot part, which are empirically obtained based on design data, work data, etc. concerning each pivot part of the machine in particular, are registered in the memory through the input means. By simply doing this, automatic lubrication of these pivot parts will always be performed at the registered optimum lubrication time interval and optimum amount of lubrication. [Effects of the invention] As described above, according to this invention, the greasing time interval and the amount of greasing can be arbitrarily set for each pivot part, and the greasing time interval and amount of greasing can be set according to the set greasing time interval and the amount of greasing. Optimal automatic lubrication can always be performed to each pivot part. [Embodiment] FIG. 1 shows an embodiment of the automatic greasing device according to this invention. As shown in FIG. 1, this embodiment is mounted on a wheel loader and has its respective pivot parts P1 to P1.
6... is an example of a device that automatically replenishes lubricating oil, including a container 10 containing lubricating oil, an electric greasing pump 30 that pumps out the lubricating oil in the container 10 based on the drive of the motor 20, and each of the above. Pivot part P1 to P6
The above-mentioned greasing pump has valves 51 to 56...5n corresponding to the above, respectively, and selectively opens these valves 51 to 56...5n based on the drive of the solenoid valve (for example, a proportional solenoid valve) 40. A switching valve 50 selectively supplies the lubricating oil supplied through the pivot parts 30 to the corresponding pivot parts, for example, a switching valve 50 that includes a counter that counts up at fixed time intervals in response to the operation of the engine of the wheel loader. The vehicle body service meter 60, which measures the cumulative operating time of an input device 70 capable of individually setting and inputting the greasing time interval and the amount of greasing for each of the pivot parts P1 to P6 . . . based on the above-mentioned operations; A memory 80 in which information regarding the refueling time interval and the amount of refueling is registered in a table format, for example, in association with an appropriate identification code indicating each pivot portion; A timing information reading circuit 91 reads the accumulated operating time information of the wheel loader by sequentially latching it, etc., and the greasing time interval information for each pivot part registered in the memory 80 and this read timing information The system calculates the greasing timing for each pivot part based on the cumulative operating time information (accumulated operating time information) and outputs the solenoid valve drive command SP corresponding to the pivot part each time the timing information reaches the greasing timing for any pivot part. The above memory 80 of the same pivot section
Motor drive command corresponding to the lubrication amount registered in
A CPU 92 that outputs ST, the switching valve 5 based on the solenoid valve drive command SP output from the CPU 92.
A solenoid valve drive circuit 95 actually drives the solenoid valve 40 so that the valve corresponding to the pivot portion at which the greasing timing of 0 has been reached is selectively opened, and the motor drive command ST outputted by the CPU 92.
The lubricating pump 30 discharges lubricating oil in an amount corresponding to the preregistered lubricating amount of the pivot portion based on the above. . FIG. 2 to FIG. 4 show an example of the specific structure of the switching valve 50. This switching valve (the one shown in FIGS. 2 to 4 is referred to as 500) mainly consists of a housing 520 fixed to the device main body (vehicle body main body) via a support member 521, and a housing 520 inside this housing 520. and a spool 530 that rotates around a shaft 531 in response to the drive of a solenoid 400 (FIG. 4) serving as the electromagnetic valve 40, and the above-mentioned spool 530 rotates around a shaft 531 in accordance with the drive of the solenoid 400 (Fig. Valves 51 to 56...
5n, and FIG. 2 shows the cross-sectional structure of the central part of the switching valve 500 seen from the side, and FIG.
The cross-sectional structure along the line A-A' in Figure 4 is also
The figures each show the drive structure of the switching valve 500. That is, the switching valve 500 illustrated here is a valve 501 corresponding to the valves 51 to 56...5n.
It has 12 valve parts of ~512, and the solenoid 4
The lever 541 is attracted through the arm 401 by the power supply of 00, and every time the ratchet wheel 540 is rotated by 1/12 through the feed pawl 542, the lever 541 is mechanically connected to the ratchet wheel 540 (the first (See figure) Oil inlet 5 of the spool 530 that rotates together with this
Twelve oil ports 523a to 32 are provided radially within the housing 520 to which the oil ports 32 are fixed.
523l (FIGS. 2 and 3 show a state in which it is engaged with one of the oil ports 523a). Here, the oil passage port 523 on the spool 530 side is
The other oil port 522 of the housing 520 is always filled with the lubricating oil supplied from the greasing pump 30, and therefore the oil port 532 is connected to the oil port 522 on the housing 520 side. By discharging a required amount of the lubricating oil from the greasing pump 30 while engaged with any one of the ports 523a to 523l, this discharge is caused through the engaged oil passage port. A corresponding amount of lubricating oil is supplied to the corresponding pivot portion. By the way, the above solenoid 4
After the power supply to 00 is cut off, the arm 401 and the lever 541 will return to their original positions due to the attractive force of the spring SP to which they are connected. By this action, the ratchet wheel 540 is held in the same position, and therefore the spool 530 is also held in the same position. In other words, this switching valve 500
, the spool 530 moves one position (1/12 rotation) based on one drive of the solenoid 400, and the valve parts 501 to 5 corresponding to the next pivot part are moved.
12 will be opened. Hereinafter, the switching valve 50 shown in FIGS.
A switching valve 500 having the structure shown in the figure is used, a solenoid 400 shown in FIG. 4 is used as the electromagnetic valve 40, and the greasing pump 3
An example of the operation of the device of this embodiment will be described in detail assuming that a type in which the amount of lubricating oil discharged is controlled based on the operating time of the drive motor 20 is used.
In addition, the above-mentioned 12 valve parts 501 to 5 of the switching valve 500
12 assumes that the valve portions 501 to 506 of these correspond to the aforementioned pivot portions P1 to P6, respectively. That is, at least six oil ports 523a to 523f of the oil ports 523a to 523l on the housing 520 side of the switching valve 500 correspond to the pivot portions P1 to P6 shown in FIG. 1, respectively. It is assumed that the two terminals are connected by appropriate pipes. It is also assumed that the lubricating oil discharge rate of the greasing pump 30 is 12 cc/min. As an example, suppose that the optimal greasing time intervals and greasing amounts for each of the pivot parts P1 to P6 are determined in the manner shown in the table below (as described above, based on the design data, work data, etc. of each pivot part). (determined empirically and arbitrarily based on
The operator inputs the settings through the input device 70. As a result, the memory 80 also has the configuration shown in the same table, and each pivot portion P1 to P6 is
Other lubrication time interval information and lubrication amount information are registered and stored.

【table】

Claims (1)

[Scope of Claim for Utility Model Registration] A container containing lubricating oil and a greasing pump that pumps out the lubricating oil by electric or air drive, etc., for machinery such as construction machinery or equipment that requires greasing. In an automatic lubrication device that is provided in the machine and automatically supplies the lubricating oil to each pivot portion of these machines through the greasing pump, the lubricating oil supplied from the greasing pump is selectively supplied to each of the pivot portions. A switching valve for switching lubrication, a clock means for cumulatively counting the operating time of the machine to be lubed, and the required lubrication time for each pivot part of the machine. an input means for setting and inputting the interval and the amount of lubrication; a memory for registering and storing the input information regarding the lubrication time interval and amount of lubrication for each pivot part; The lubrication timing for each pivot section is determined based on the lubrication time interval information for each pivot section and the timing information by the timing means, and each time the timing information reaches the lubrication timing for any pivot section, the switching valve is activated. An automatic lubrication system characterized by comprising: a control means that is opened corresponding to the pivot section and drives the lubrication pump according to the lubrication amount registered in the memory of the pivot section. Device.