JP2627776B2 - Display device for grease pressure management of bearings - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a display device for managing grease filling pressure of a bearing for a construction machine.

2. Description of the Related Art FIG. 4 is a side view of a hydraulic excavator among construction machines. In the figure, 1 is a lower traveling structure, 2 is an upper revolving structure, 3
Is a work attachment attached to the front part of the upper revolving unit 2, 4 is a boom of the work attachment 3, 5 is an arm, 6 is a bucket, and 7, 8, 9, 10, and 11 correspond to joints of the work attachment 3, respectively. This is a pin joint. Fifth
The figure is a cross-sectional view of the pin connecting portion 9 as viewed from AA in FIG. In the drawing, 12 is a bracket member at the tip of the boom 4, 13 is a boss member at the base end of the arm 5, 14 is a pin, 15 and 16 are bushes with flanges respectively fitted to the left and right sides of the boss member 13,
Reference numeral 17 denotes a left bearing portion of the pin connecting portion 9, 18 denotes a right bearing portion, 19 denotes a grease reservoir inside the boss member 13, 20 and 21 denote sealing members, 22 denotes a clamp ring, 23 denotes a greasing port, and 24 denotes a greasing port. This is a locking portion for fixing the pin 14.

Next, the configuration of the prior art pin coupling section 9 will be described with reference to FIG. A boss member 13 is connected to the bracket member 12 via a pin 14, and the boss member 13 is rotatably connected to the pin 14. Therefore, the left and right bearings 17,1
The lubrication of 8 is performed by supplying grease from the greasing port 23 to the grease reservoir 19.

Problems to be Solved by the Invention When grease is supplied to the left and right bearings of the pin joint, grease is filled in the grease reservoir inside the boss member and the sliding portion between the inner peripheral surface of the bush with the collar and the outer peripheral surface of the pin. I do. With the conventional construction machine, the state of the grease filling cannot be visually observed.If the grease is further continued to be injected, the grease filling pressure becomes abnormally high. Overflowing to A large amount of grease wasted and was uneconomical. In addition, the degree of grease consumption and grease preparation when the construction machine is operating is based on the magnitude of the load applied to each bearing, the frequency of sliding between the bush with the collar and the pin, the sliding speed, and the temperature of each bearing. It depends on the situation. Therefore, when the grease is consumed and the grease pressure is abnormally reduced, the bearing portion may be seized and damaged.

An object of the present invention is to solve the above-mentioned problems and to provide a grease pressure management display device capable of displaying grease pressure.

Means for solving the problem a. Pressure detecting means for detecting the grease pressure of each bearing, b. Storage means for storing a set reference grease pressure for each bearing portion; c. Calculating means for comparing the grease pressure detected by the pressure detecting means with the upper and lower limits of the set reference grease pressure; d. The upper limit of the set reference grease pressure
Means for outputting a signal indicating a value within the lower limit, above the upper limit, or above the lower limit; And display means for displaying based on the signal.

Action b. Since pressure detectors are provided on each bearing part of the pin joint,
The grease pressure in each bearing can be detected.

B. Grease standards were set for each bearing in consideration of the appropriate grease preparation, and input to the memory. As a result, the controller stores the set reference grease pressure of each bearing.

C. The controller can compare and calculate the grease pressure detected in the above item a with the upper limit value and the lower limit value of the set reference grease pressure.

D. A signal indicating a value within the upper / lower range of the set reference grease pressure, higher or lower, or lower than the lower limit when the comparison operation is performed in the above item (c) is output to the display.

E. On the display, a light-emitting body such as a lamp corresponding to each bearing is displayed. The luminous body has a plurality of different colors that can indicate that the detected grease pressure is within the upper and lower limits of the set reference grease pressure, the upper limit and the lower limit, respectively, for each bearing portion. Are formed of the light-emitting bodies for each color. Thereby, the driver can discriminate and manage the abnormally high, appropriate, and abnormally low grease pressures of the bearings by visually observing the light emitting body.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a grease pressure management display device according to the present invention. In the figure, 25
Is a pin connecting portion of a construction machine having a display device according to the present invention, 26 and 27 are respectively left and right bearings of the pin connecting portion 25, 28 is a bracket member, 29 is a boss member, 30 is a pin, 31, 32 is a bush with a rim fitted to the left and right sides of the boss member 29, 33 is a grease reservoir inside the boss member 29, 34
Is a greasing port, 35 and 36 are grease pressure detecting pressure sensors provided on left and right bearings 26 and 27, and 37, 38 and 39 are grease pressures provided on bearings (not shown) of other pin joints. Pressure detector for detection,
Numeral 40 is a controller having a microcomputer, 41 is a reference grease pressure setting group for each bearing section input to the controller 40, and 42 is a display. FIG. 2 is a view showing a display screen portion of the display 42 in FIG. In the figure, reference numerals 7 ', 8', 9 ', 10', and 11 'denote respective pin connection parts for controlling grease pressure, and reference numerals 43, 44, 45, 46, and 47 denote pin connection parts 7',. ′ Is a group of light emitters that clearly indicate the grease pressure state of the left and right bearings (not shown).

Next, the configuration of the grease pressure management display device according to the present invention will be described with reference to FIGS. 1 and 2. FIG. As pressure detecting means for detecting the grease pressure of each bearing, pressure detectors 35 to 39 are provided on the left and right bearings of the pin joint.
In addition, a grease reference pressure was set for each bearing part in consideration of an appropriate grease preparation, and input to a memory (not shown). Then, it is possible to input signals from the pressure detectors 35, to 39 to a controller 40 having a microcomputer, and further calculate by the controller 40,
The output signal is set to be output to the display 42.
At the same time, the luminous body provided on the display is set to be capable of luminous display based on the output signal, and is configured.

Next, the function of the grease pressure management display device according to the present invention will be described. Pressure detector installed in each bearing
The pressure signals detected by 35 to 39 are input to the controller 40. The controller 40 compares the detected grease pressure with the upper limit value and the lower limit value of the set reference grease pressure of each bearing input to the memory.
Then, when the comparison operation is performed as described above, a signal indicating a value within the upper / lower range of the set reference grease pressure, equal to or higher than the upper limit or equal to or lower than the lower limit is output to the display 42. On the display 42, luminous bodies 43, to 47, such as lamps, corresponding to each bearing part are displayed. Since the luminous bodies 43 to 47 are formed of a plurality of luminous bodies for each color having different colors, for example, when the blue lamp is turned on, the detected grease pressure is equal to or more than the upper limit of the set reference grease pressure,
When the red lamp is lit, it indicates that the detected grease pressure is within the upper and lower limits of the set reference grease pressure, and when the yellow lamp is lit, it indicates that the detected grease pressure is below the lower limit of the set reference grease pressure. Thus, the driver can discriminate and manage the abnormally high, proper, and abnormally low grease pressure of each bearing by visually observing the display screen of the display 42. FIG. 3 shows the controller 40
6 is a flowchart showing the operation of the embodiment.

Effect of the Invention In the prior art construction machine, when lubricating each bearing part, the state of the filled grease pressure cannot be visually observed, so if further grease is injected, the grease pressure becomes abnormally high,
The grease overflows outside due to the urging force of the seal member. A large amount of grease wasted and was uneconomical.
The degree of grease consumption and grease preparation during construction machine operation depends on the magnitude of the load applied to each bearing, the sliding frequency of the peripheral parts, the sliding speed, and the temperature of each bearing. It will be different. Therefore, when the grease is consumed and the grease pressure is abnormally reduced, the bearing portion may be seized and damaged.

However, in the grease pressure management display device according to the present invention, a pressure detector for detecting grease pressure is provided in each bearing, and an appropriate grease reference pressure is set in each bearing, and input to the memory. . Then, a signal from the pressure detector was input to the controller, and a calculation was performed by the controller. The output signal was set to be output to a display. At the same time, the illuminant disposed on the display is set to be able to issue and display based on the output signal. Thus, the driver can discriminate and manage the abnormally high, appropriate, and abnormally low grease pressure of each bearing by visually observing the display screen of the display.

Therefore, in the construction machine provided with the display device for grease pressure management according to the present invention, the lubrication management of each bearing portion is rationalized, and the maintainability and economy are improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a grease pressure management display device according to the present invention, FIG. 2 is a diagram showing a display screen portion of a display in FIG. 1, FIG. 3 is a flowchart showing an operation of a controller, FIG. 4 is a side view of the hydraulic excavator, and FIG. 5 is a cross-sectional view of the pin connecting portion viewed from AA in FIG. 17, 18, 26, 27 Bearing 23, 24 Greasing port 35, 39, Pressure detector 40 Controller 41 Standard grease pressure setting group 42 Display 43, 47 ……Luminous body

Claims (1)

(57) [Claims] A pressure detecting means for detecting a grease pressure of each bearing for a construction machine; a storage means for storing a set reference grease pressure for each bearing; and an upper limit and a lower limit of the set reference grease pressure. Calculating means for comparing and calculating the grease pressure detected by the pressure detecting means;
A grease pressure management display device for a bearing unit, comprising: means for outputting a signal indicating a value equal to or more than an upper limit or less than a lower limit; and display means for displaying based on the signal.