JPH11342767A - Weight balance display device of work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install a proper weight by providing a display means for displaying the required weight number or required weight for excellently keeping a weight balance of a car body. SOLUTION: A hanger part is constituted in the tip part of a front axle bracket 11, and a front hange weight 5 is hooked on the hanger part. A front wheel burden load sensor for detecting front/rear vehicles of a car body is arranged in an axle case 12 of front wheels 4 to input a detecting result to a controller. The controller displays the loading number or lacking weight of the front balance weight 5 of prescribed weight on a liquid crystal image screen 30 so that a front wheel burden load becomes a constant rate or less of car body weight by data on prestored car body weight to thereby prevent the improper number of weights from being installed by mistaking the weight relationship between the lacking weight and the balance weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight balance display device for a work vehicle such as an agricultural tractor or a forklift for transportation.

[0002]

2. Description of the Related Art Conventionally, there has been known a work vehicle such as an agricultural tractor that connects various work machines so as to be able to move up and down freely and that a predetermined weight can be attached according to the work machines and work form. And regarding such a work vehicle,
For example, as disclosed in Japanese Patent Application Laid-Open No. 6-247698, there is known an apparatus having a monitor for calculating a rotational moment according to a load loaded on a forklift and displaying the calculated rotational moment.

[0003]

[0005] These work vehicles are configured to mount weights that are standardized by region or business type according to various works. However, an operator who is unfamiliar with the operation has a problem that the number of the weights is erroneously set so that the front-to-rear weight balance of the entire vehicle body cannot be maintained well, thereby impairing the operation efficiency and dropping the load.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is configured to connect various working machines 3 so as to be able to move up and down, and to be able to mount predetermined weights 5 according to the working machines 3 and working forms. The work vehicle is provided with a display means 30 for displaying the number of weights 5 or the required weight required to maintain a good weight balance of the vehicle body.

[0005] As a method of displaying on the display means 30, as described in claim 2, the work machine 3 connected to the vehicle body or the work form is detected, or the result obtained from the means for designating these is specified. And a display in accordance with the result obtained from the front-rear or left-right weight of the vehicle body, or the working machine 3 or the load 27 applied thereto, as described in claim 3. did.

[0006]

The weight balance display device for a work vehicle constructed as described above can be used even by an operator who is unfamiliar with the work.
An appropriate weight can be attached according to the displayed number and weight of the weights 5.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below for an agricultural tractor. As shown in FIG. 1, the tractor body 1 connects a clutch housing 9, a transmission case 10 and the like from an engine 8 under a front hood 7 to a rear side, and a front axle bracket 11 at a front part of the engine 8. A front axle housing 12 on which the front wheel 4 is mounted is provided, and a rear axle housing 14 on which the rear wheel 13 is mounted is provided on both left and right sides of the transmission case 10.

The front wheel 4 and the rear wheel 13 are transmitted by driving the engine 8 to drive four wheels, and the front wheel 4 is steered by rotating the steering handle 15. Reference numeral 16 denotes a cockpit, and 17 denotes a fender. A cylinder case 19 is provided at the upper part of the transmission case 10, and a hydraulic cylinder 20 is provided inside the cylinder case 19, and a piston 21 of the hydraulic cylinder 20 is moved back and forth by hydraulic pressure to rotate the lift arm 2 up and down. I have.

The front axle bracket 1
As shown in FIG. 3, a hanger portion 25 is formed at the tip of the device 1, and a front hanger weight 5 made of cast material can be scratched on the hanger portion 25. At the rear end of the transmission case 10, a pair of left and right lower links 23 and a top link 24 which are connected to the lift arm 2 by a lift rod 22 and move up and down are provided. Various working machines are mounted on the rear part. Thus, when the lift arm 2 is turned up and down, the working machine can be moved up and down. In FIG. 1, the rotary tilling device 3 is connected.

An axle case 12 for the front wheels 4 is provided.
Is provided with a front wheel load sensor 27 composed of a strain gauge for detecting the front and rear weight of the vehicle body, and the result of this detection is input to the controller 28. Then, as shown in the flow chart shown in FIG. 4, the controller 28 controls the front balance of the predetermined weight so that the front wheel load is equal to or less than a predetermined ratio (for example, 20%) of the vehicle weight based on the vehicle weight data stored in advance. The number of weights 5 to be added or the insufficient weight is displayed on the liquid crystal screen 30.

The liquid crystal monitor 30 is provided on the meter panel 6 in front of the steering wheel 15, and has a meter gauge 29 for displaying a vehicle speed, an indicator 31, and the like arranged on the sides. In addition to the monitor control for displaying the weight, the controller 28 detects the operation amount of the position lever with the potentiometer 32 and controls the solenoid of the proportional pressure control valve so that the potentiometer 33 of the lift arm 2 becomes the same amount. 34 and 35 are output to perform position control for raising and lowering the lift arm 2.

When the insufficient weight is displayed on the front wheel load, the front balance weight 5 is added to display "weight OK" on the monitor 30. In FIG. 4, the difference from the above example is that when the front balance weight 5 is standardized by region or business type, this weight is transferred to the controller 2.
8 and a configuration with a constant unit weight.
Is displayed as an additional number based on the shortage. This prevents an inappropriate number of weights from being mounted by mistake in the relationship between the insufficient weight and the weight of the front balance weight.

As a method of displaying the weight, a selectable work machine designation switch 18 such as a "rotary work machine", a "plow work machine", or a "pulling work machine" is provided on the side of the cockpit. The number of weights or the insufficient weight may be displayed based on the weight predicted from the machine. Further, the hydraulic cylinder 20 may be provided with an oil pressure gauge for detecting the hydraulic pressure acting on the hydraulic cylinder 20, and the lift arm 2 It is also possible to read the hydraulic pressure when the pressure rises with the pressure gauge 26 and display the optimal number of weights 5 or the insufficient weight as the burden weight applied to the work implement 3.

In FIG. 5, a different point from the above example is that a fuel tank 36 for storing fuel for the engine 8 is provided below the hood 7 at the front of the tractor body 1 and the fuel supply port 3 is provided.
The opening 7 can be opened on the bonnet 7 so that oil can be supplied. In the vicinity of the fuel supply port 37 for the fuel tank 36,
For example, an auxiliary fuel gauge 39 is provided on the front grille 38 so that the operator can view the image independently of the main fuel gauge 40 arranged on the monitor 6.

The fuel gauge circuit 41 of the fuel gauge 40 is configured to pass through a battery 42, a fuse 43, a changeover switch 44, and the like, and can be viewed on the cockpit 16. This changeover switch 4
An auxiliary fuel gauge 39 for displaying the fuel in the fuel tank 36 by the switching operation 4 is connected to the circuit 41. 45 is a fuel tank. 46 is a cabin. Fuel tank 36
At the time of replenishing the fuel, the changeover switch 44 is switched from the main fuel meter 40 to the auxiliary fuel meter 39 to supply the fuel to the refueling port 37. The refueler performs refueling while looking at the auxiliary fuel gauge 39 at the front grill 38 near the refueling port 37 with the eyes M, so that overflow from the refueling port 37 can be eliminated.

The changeover switch 44 and the auxiliary fuel meter 39
Can be simply configured using the fuel meter circuit 41 of the main fuel meter 40. 6 is different from the above example in that the fuel gauge 40 of the monitor 6 is configured to be detachable, and the fuel gauge 40 is attached to the fuel gauge circuit 41 near the fuel supply port 37 of the fuel tank 36 by a coupler or a connector. The fuel tank 36 can be replenished while looking at the fuel gauge 40 when refueling.

It is to be noted that the fuel gauge 40 may be drawn out of the monitor 6 so that the fuel gauge 40 is pulled out and moved together with the wiring cord to the vicinity of the filler port 37 when refilling the fuel tank 36. In addition, instead of the fuel gauge 40 in the draw-out mode, a terminal device is provided detachably, and this terminal device is
It is good also as a structure which refuels while placing near.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor and a plan view of a monitor unit thereof.

FIG. 2 is a block diagram of a control unit and a flowchart of a part thereof.

FIG. 3 is a plan view of a front balance weight portion showing a partly different form, and a side view thereof.

FIG. 4 is a plan view of a monitor and a control flowchart.

FIG. 5 is a fuel gauge circuit diagram showing a partially different embodiment.

FIG. 6 is a fuel gauge circuit diagram showing a partially different embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Lift arm 3 Work implement 4 Front wheel 5 Front balance weight 6 Monitor

Claims (3)

[Claims] A work machine (3) is connected so as to be able to move up and down freely, and a predetermined weight (5) is set according to the work machine (3) and a work form.
Is provided with a display means 30 for displaying the number of weights 5 or the required weight necessary for maintaining a good weight balance of the vehicle body. Display device. 2. The number of weights 5 or the required weight required to maintain a good weight balance of the vehicle body according to claim 1 is determined by detecting a working machine 3 or a working form connected to the vehicle body, Work vehicle weight balance display device configured to display according to the result obtained from designating means 18 3. The number or weight of the weights 5 required for maintaining a good weight balance of the vehicle body according to claim 1 or the weight of the front and rear or left and right of the vehicle body, or the work implement 3 or the load applied thereto. Work vehicle weight balance display device configured to display according to the result obtained from detection means 27