JPS5837458B2 - excavation work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a means for completing an excavation to a desired depth in an excavating vehicle such as a backhoe or a face shovel.

With this type of excavation work vehicle, the operator controls whether the depth of the trench formed during excavation work has reached the planned level, and whether the excavation is too deep than the planned level. people need to know.

For this reason, conventionally, as shown in Japanese Patent Application Laid-Open No. 50-103802, an angle measuring means such as a potentiometer is provided at each joint of the boom, arm, and packet, and the measurement results are calculated. Therefore, measures have been taken to automatically control digging deeper than a predetermined level, but taking such automatic control measures just to know the digging depth will unnecessarily increase the cost of the excavation vehicle. In addition, in models without such automatic control means, the operator has to frequently get off the moving aircraft and actually measure the depth, especially when the excavated ground is under muddy water. It is difficult to even measure it in areas that are submerged in water.

A technical problem to be solved by the present invention is to utilize the unique structure of an excavating vehicle, which includes a bendable boom, arm, and packet, to construct a means for measuring excavation depth as simply as possible.

The technical means of the present invention taken to solve the above problems are as follows:
In the above-mentioned excavation work vehicle equipped with a bendable boom, an arm, and a packet, a device for detecting whether or not the arm and packet are perpendicular to the excavated ground with respect to the arm and the packet; A device for displaying a detection result by the device is provided, and a boom angle measuring device is provided for the boom to measure the inclination angle of the boom relative to the ground. A calculation display device is provided for calculating and displaying a level difference between the measuring point and the work vehicle grounding point based on the inclination angle of the boom with respect to the ground when the lower end of the packet is grounded on the excavated ground serving as the measuring point. It is.

The effects obtained by taking the above technical measures are as follows.

In other words, this type of excavation work vehicle always has three components necessary for the excavation work: a boom, an arm, and a packet, and these three components are constructed so that they can be bent to each other. This structure is unique to excavation work vehicles, in that the joint between the boom and arm and the tip of the packet can be aligned in a straight line, and the direction of the straight line can be directed perpendicular to the excavated ground. From the length of the arm and boom oriented perpendicular to the excavated ground, the length of the boom multiplied by the sine of the angle of inclination of the boom to the ground and the height from the ground to the boom pivot point are calculated. The excavation depth can be easily calculated by subtracting the angle of refraction of the arm or packet. Since all that is required is a device for detecting and displaying whether the packet is perpendicular to the excavated ground, and a device for measuring and calculating the angle of the boom to the ground, it is an extremely simple means of measuring the depth of excavation. It has now been possible to construct it with a simple device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the structure of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a driving unit 3 and a driving cabin 4 are mounted on a swivel base 2 which is provided on a crawler type traveling device 1 so as to be able to drive and rotate freely around a longitudinal axis, and a hydraulic cylinder 5, A backhoe device is attached to the boom 8, arm 9, and packet 10, which can be freely driven and moved around a horizontal axis by 6 or 7, thereby constructing a backhoe work vehicle.

As shown in FIG. 2, a rank 11 is attached to the boom hydraulic cylinder 5, with its free end side being held by a guide 12, and the rank 11 slides integrally with the cylinder hanging rod 5a. A potentiometer 14 operated by a pinion gear 13 is provided, and the potentiometer 14 is configured as a boom angle measuring device for measuring the angle of inclination of the boom 8 relative to the ground. Switch 15a, 1
5b, these mercury switches 15a, 15b,
It is constructed as a detection device for detecting whether the arm 9 and the packet 10 are perpendicular to the excavated ground.

As shown in FIG. 3, a mercury switch 15a.
A device 1 such as a lamp that displays whether or not the attitude of the excavated ground with respect to the excavated ground is vertical based on information from each 15b.
6a, 16b, arm 9 and packet 1.
0 perpendicular to the excavated ground and the lower end of the packet 10 is grounded to the point to be measured such as the bottom of a groove or hole. A calculation display device 17 is provided to calculate and display the level difference d between the point and the ground contact point of the work vehicle, so that the excavation depth can be measured using a backhoe device.

In other words, the swing radius of the pivot P2 of the boom 8 and the arm 9 is l1, the distance from the pivot P2 to the lower end of the packet 10 when the arm 9 and the packet 10 are at the set angle to the ground is l2, and the boom base end side pivot is l1. The excavation depth d when the level difference between the branch P1 and the ground contact point of the work vehicle is h and the inclination angle of the boom 8 is θ.
The value calculated by this equation is shown to the driver by the calculation display device 17.

A memory circuit is built into the calculation display device 17, and before excavation, the lower end of the packet 10 with the arm 9 at the set angle to the ground is brought into contact with the ground at the location to be excavated, and the boom 8 at that time is grounded. If the value calculated based on the ground angle θ is stored and the calculated value is displayed after subtracting the memorized value from the detected calculated value during or after excavation, then the Measurement accuracy can be further improved without receiving any damage.

In order to link the boom hydraulic cylinder 5 and the potentiometer 14, as shown in FIG. The roller 19 may be pressed by a spring 20, or the roller 19 may be pressed against the cylinder rod 5a on the inside or outside of the cylinder tube 5b, and the potentiometer 14 may be of a sliding type. In addition, various configurations may be freely adopted without departing from the spirit of the present invention.

Further, the present invention can be applied to excavation work vehicles such as face shovel work vehicles and backhoe work vehicles of various configurations.

[Brief explanation of drawings]

The drawings show an embodiment of the excavation work vehicle according to the present invention, FIG. 1 is a side view, FIG. 2 is an enlarged view of the boom cylinder, FIG. 3 is a block diagram showing the measuring means, and FIG. 4 is another embodiment. It is an enlarged view of a cylinder for booms showing an example. 8...Boom, 9...Arm, 10.
... Packet, 14 ... Boom angle measuring device, 15a, 15b ... Detection device, 16a, 1
6b...Display device, 17...Calculation display device, d...Level difference, θ...Boom to ground angle.

Claims (1)

[Claims] 1 A boom 8 that can be raised and lowered is equipped with respect to the traveling vehicle body, and an arm 9 that can swing freely on the tip side of the boom 8 and a packet 1 that can swing freely on the tip side of the arm 9.
0, the arm 9 and the packet 10 are provided with the arm 9 and the packet 10.
0 is perpendicular to the excavated ground, and devices 16a and 16b that display the detection results of the detection devices 15a and 15b are provided, and with respect to the boom 8, A boom angle measuring device 14 is provided to measure the inclination angle θ of the boom 8 with respect to the ground, and further, with the arm 9 and the packet 10 perpendicular to the excavated ground, the lower end of the packet 10 is placed on the excavated ground to be measured. The inclination angle θ of the boom 8 relative to the ground when it touches the ground
An excavating work vehicle characterized in that it is provided with an arithmetic display device 17 that calculates and displays a level difference d between the measured point and the work vehicle ground contact point based on the above.