JPS5931323A - Excavating working vehicle - Google Patents

Abstract

PURPOSE:To keep a reference position with respect to vehicle at a given position by providing a pressure detector for bucket operation and a memory for turning positions to an excavating working vehicle provided with a detector and a controller for the turning position with respect to the vehicle of a turning base. CONSTITUTION:A device 10 to detect the turning position with respect to vehicle of a turning base 1 provided with an excavating working vehicle by using a potentiometer is provided to the excavating working vehicle. A control mechanism to automatically operate a turning base driver 3 in such a way as to restore the turning base 1 to a reference turning position with respect to vehicle and turn it for excavation on the basis of the information from the device 10, etc., is also provided. Also, a pressure detector 18 detect the drive pressure of a fluid-pressure cylinder 8a for operating a bucket 8 and a memory 11 to store the turning position with respect to vehicle of the turning base 1 as a reference turning position each time drive pressure above a set one are detected are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a device for detecting the rotational position relative to the vehicle body of a swivel base equipped with an excavation work device, and based on information from the detection device, the swivel base is used for #A excavation work. For example, an excavation work vehicle equipped with a control mechanism that automatically operates a swivel base drive device so as to rotate the swivel base back to the standard rotation position with respect to the vehicle body is used for excavation work. Excavating a trench or digging a hole is carried out while rotating so that the earth and sand are rotated and transmitted from the desired rotational position relative to the car body to the target rotational position relative to the car body where the earth and sand should be released, and then returned to the reference rotational position relative to the car body after releasing the earth and sand.1 This system is designed to automatically return the swivel base to the standard rotation position relative to the vehicle body, but it is also possible to stop the heavy swivel base at the standard rotation position relative to the vehicle body or the target rotation position relative to the vehicle body. At times, the vehicle body may unexpectedly rotate relative to the ground due to the dynamic inertia of the swivel base, and as a result, if work is continued with the reference rotational position relative to the vehicle body maintained at a constant position, the control mechanism may Even if the swivel base is rotated back to the standard rotation position with respect to the vehicle body, there is a risk that the rotation position of the swivel base with respect to the ground will deviate significantly from the desired rotation position. It is troublesome that the swivel table must be manually operated over a large range to a desired rotational position relative to the ground.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to prevent the reference position of the swivel base relative to the vehicle body from deviating significantly from the desired rotational position of the swivel base with respect to the ground. be.

The configuration of the present invention is that the above-mentioned excavation work vehicle is provided with a pressure detection device for detecting the driving pressure of the baguette operating fluid uE cylinder of the excavation work device, and that the detection device detects a driving pressure equal to or higher than a set pressure. The present invention is characterized in that a storage device is provided for storing the rotational position of the swivel base relative to the vehicle body at that time as the reference rotational position relative to the vehicle body at each detection.

Next, the effects of the characteristic configuration of the present invention will be described.

That is, the reference rotational position of the swivel base with respect to the vehicle body is stored as the pressure detection device detects the drive pressure of the packet operation fluid pressure cylinder detects a drive pressure equal to or higher than the set pressure, and each time it is detected. It is intended to replace the rotational position of the swivel base relative to the vehicle body at that time, that is, the rotation position of the swivel base relative to the vehicle body is the rotation position at which excavation work is to be performed.
It is detected when the driving pressure of the fluid pressure cylinder for packet operation exceeds a set pressure as the packet scrapes up dirt, and the rotational position of the swivel base relative to the vehicle body at that time is stored as the reference rotational position relative to the vehicle body. Even if the vehicle body rotates relative to the ground when the swivel base is stopped at the vehicle body reference rotation position or the vehicle body reference rotation position where earth and sand should be discharged. , the resulting deviation between the reference rotational position of the swivel base with respect to the vehicle body and the desired rotational position of the swivel base with respect to the ground is corrected each time the swivel base is rotated back and forth. Therefore, after the control mechanism has finished operating, manually move the swivel base to the desired rotational position relative to the ground as necessary.
), it is a simple operation with a small amount of rotation.

Moreover, according to the present invention, as described above,
The body rotation position of 1 m is the rotation position at which excavation work should be performed.
The system detects when the driving pressure of the packet operating fluid pressure cylinder becomes lower than the set pressure as the packet scrapes up earth and sand, and stores the reference rotational position relative to the vehicle body. The above advantages can be obtained even in operations where the height of the packet relative to the vehicle body differs depending on the excavation.

As a result, an excavation work vehicle has been obtained which eliminates the above-mentioned disadvantages and can be used more conveniently.

Next, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 1, a swivel table (1) is rotatably attached to a vehicle body equipped with a cloak traveling device (2) by a hydraulic motor (31), and an engine (4) and a control section (5) are attached to the vehicle body. The above-mentioned swivel base (11K is mounted, and a boom (6) that can freely pivot against the swivel base-E, an arm (7) that can freely swing against the boom, and a packet that can freely swing against the arm (8)
) respectively as fluid pressure cylinders (6a) and (7a).

A back-hook work device (9) that is operated by swinging at (8a) is connected to the swivel base (1) to constitute a back-hook work vehicle.

As shown in FIGS. 1 and 2, a device detects the rotational position of the swivel base (tn) with respect to the vehicle body using a position meter, and a reference rotation position of the swivel base (1) with respect to the vehicle body for excavation work. A device (111) for storing the position as described later is provided, and a signal from the rotational position detecting device f101 and a signal from the storage device (11) are transmitted so as to rotate the swivel base (1) back to the rotational position relative to the vehicle body. A discrimination circuit 1131 is provided which energizes the operating pulp (121) of the hydraulic motor (3) while comparing and discriminating, and automatically rotates the swivel base (1) to return to the reference position relative to the vehicle body. It constitutes a control mechanism that operates the hydraulic motor (3) for operating the swivel table.

a device t151 configured to be able to directly move the spool, and detect the rotational speed of the swivel base (1) in the return rotation state by differentiating the signal from the rotational position @ detection device f101; (Comparing the signal of 151 with the signal preset in the setting device, the 'l' lJ separate circuit (
13, a discrimination circuit (a comparator W!laη that automatically switches 13 between an activated state and a non-actuated state) is provided, and the control mechanism is controlled when the swivel base (1) is at the reference rotational position relative to the vehicle body. The device is configured to automatically operate when a condition is brought about in which the device is rotated at a speed higher than a set speed.

In short, the swivel table (1) is rotated from the standard rotational position relative to the car body where excavation work is to be performed to the target rotational position relative to the car body where the earth and sand should be discharged, and after the earth and sand is discharged, it is rotated back to the reference rotational position relative to the car body. When excavating a trench or drilling a hole, the manual lever (14) is used to rotate the swivel base (1) at a set speed or higher in order to return the swivel base (1) to the standard rotation position relative to the vehicle body. After that, the rotation position of the swivel base (1) can be automatically controlled by the control mechanism, and the rotation position of the swivel base (1) can be adjusted near the reference position relative to the vehicle body or near the target rotation position relative to the vehicle body. For fine adjustment, use the manual lever (1
The swivel base (1) can be rotated at a slow speed while reciprocating the swivel 41.

A pressure detection device (18) for detecting the driving pressure of the packet operating fluid pressure cylinder (8a) is attached to the fluid pressure cylinder (8a), and the signal of the detection device (181) and the packet (8) detect soil and sand. A comparator (marked with ■) is provided to determine whether the cylinder drive pressure has been reached based on the signal from the setting device +191 that sets the cylinder drive pressure generated during scraping. Along with determining the pressure that has exceeded the set pressure, and
The comparator (1) stores the rotational position of the swivel base (1) relative to the vehicle body as the reference rotational position relative to the vehicle body each time the storage device (111) makes a determination.
It is configured to give operation commands to the controller.

In short, every time the back-hook work device (9) performs excavation work, the reference position relative to the vehicle body is memorized to be the rotational position relative to the vehicle body of the swivel base (1) at that time, and the vehicle body is unexpectedly rotated relative to the ground. This is to prevent the reference position relative to the vehicle body from deviating significantly from the desired rotation position of the swivel base (1) relative to the vehicle body.

The present invention can be applied to an excavation work east equipped with various excavation equipment such as a face shovel work device instead of the pack-hook work device (9).

Further, in carrying out the present invention, information from the vehicle body rotation position detection device f101 is used to determine that the swivel table (1) is rotated from the vehicle body reference rotation position where excavation work is to be performed to the vehicle body target rotation position in order to release earth and sand. automatically based on the swivel base drive (3
) It would be more convenient to provide a control mechanism that automatically performs this while operating.

Further, in carrying out the present invention, the structure for starting the control mechanism can be modified in various ways, such as by providing a dedicated starting switch.

[Brief explanation of drawings]

FIG. 1 is a side view of the backhoe working mechanism, and FIG. 2 is a block diagram showing the configuration of the control mechanism. (Old...swivel base, (31...swivel base drive device, (9)...excavation work equipment, flO)...
...Rotational position detection device, flll...Storage device, tllD...Pressure detection device.

Claims (1)

[Claims] A device Ot1 for detecting the rotational position relative to the vehicle body of a swivel base (1) equipped with an excavation work device (9) is provided, and based on information from the detection device [110], the swivel base (1) is used for excavation work. An excavation work vehicle is provided with a control mechanism that automatically operates a swivel base drive device (31) so as to return and rotate the excavation work device (31) to the desired rotational position relative to the vehicle body.
9) A pressure detection device (old) is installed to detect the driving pressure of the packet operation fluid pressure cylinder (8a), and when the detection device (penalty detects a driving pressure higher than the set pressure), The excavating vehicle is further provided with a storage device (11) for storing the rotational position of the swivel base (1) relative to the vehicle body at that time as the reference rotational position relative to the vehicle body.