JPS58131023A - Detector for direction of rotation of body to be driven for loading car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotational direction detection device for a driven body such as a mixer drum mounted on a rapid vehicle such as a concrete mixer truck.

In general, a driven body such as a mixer drum mounted on the body frame of a vehicle such as a concrete mixer truck is controlled to drive, forward, reverse, increase, and decelerate to load, mix, and discharge fresh concrete. I have to. By the way, it is being considered whether to perform the above-mentioned operation control by electric remote control, but in order to control it, it is necessary to detect the 1 degree direction of the rotating blade of the driven body, but with conventional detection means, one or more sensor The rotational direction was detected by detecting the signal amount phase of each sensor using the conventional method, but the installation space is limited on a moving vehicle such as a mixer truck, and the circuit etc. are complicated.

In view of the above, the present invention provides a rotational direction detection device for a driven body mounted on a vehicle, which uses one sensor as a detection means and is equipped with a +iH control device such as a microcomputer to simplify the control system. t' is provided.

EMBODIMENT OF THE INVENTION Hereinafter, an example in which the present invention is applied to a concrete mixer truck will be described with reference to the drawings.

In the first vA, a mixer drum 2 as a driven body is rotatably supported on a body frame (not shown) of a mixer truck. Mixer drum 2 is hydraulic motor M
The hydraulic motor M is rotated by a reverse variable lid hydraulic pump P (hereinafter simply referred to as pump) which is driven by the driving engine E.

The pump P is controlled by an internal S operating device 6 provided in the mixer truck, the operator's cab, etc., or an external operating device 4 detachably provided at several locations outside the operator's cab. It has become.

1111 The servo valve for controlling the pump P has an operation 1.
1. A lever 6 is connected, and the rotation of the pump P can be controlled by swinging the operating lever 6 from side to side.In other words, the operating lever 6 can be moved to the right from the stop position S shown in Figure @1. When the pump P1 swings, the pump P1, that is, the mixer drum 2 is rotated in the normal direction. If the pump P1, ie, the mixer drum 2, swings to the left from the stop position S, the pump P1, that is, the mixer drum 2, is reversed, and as the swing angle is increased, the rotation speed is gradually increased.

The operating lever 6 is interlocked with an electric motor 9 as a drive device through an interlocking rod 7 and a swing lever 8, and this electric motor 9 is connected to a control device such as a microcomputer through a button and a meter 10. By controlling the rotation of the electric motor 9, the rotation of the pump P can be electrically controlled.

A sensor 12 is connected to the control device 11 so as to detect the rotational speed of the mixer drum 2 and output it as an output signal.

Display devices 13 and 14 installed inside and outside the driver's seat are connected to the control device 11 in order to display various conditions such as the rotation speed of the mixer drum 2 and the importance of the power supply. can be sent.

Incidentally, reference numeral 15 denotes a throttle lever for increasing and decelerating the engine E, and the throttle lever 15 is interlocked with an electric motor 18 via an interlocking rod 16 and a swinging lever 17, and the electric motor 18 is a control device! 11.

Next, the operation of the present invention will be described. The pump P is driven by the power of the running engine, pressure oil is supplied from the pump P to the hydraulic motor cover, and the mixer drum 2 is rotated.

On the other hand, the rotation speed setting signal of the operation a6, the rotation signal of the sensor 12, and the operation signal of the electric motor 9 as a drive device are input to the control device 11, and the electric motor 9 is controlled by the output signal of the control device 11, and is eventually operated. Pump P is controlled via lever 6.

A rotation speed setting signal is input to the 1# device 11 by rotating it in the reverse direction R (forward rotation Y during i training) to a desired position using the operating device 6 or an external operating device 4 that is substantially similar to this. However, in this case, the output of the control device 11 is the electric motor 9
In addition, the signal is also sent to the electric motor 18 for engine I mode, and also increases and decelerates the driving engine.

Next, I will explain the tsuba sasaku.

First, the rotation speed of the mixer drum 2 is detected by the sensor 12, and the rotation signal is transmitted to the control device 11.

At this time, the pulse of the output signal from the sensor 12 is detected as shown in FIG. 2 (&), but the control device 11 cannot determine whether the rotation direction of the mixer drum 2 is forward or reverse based only on this pulse. Therefore, the control device 11 sends a slight forward rotation operation signal! 111 When the output is sent to the motor 9, the operating lever 6 is activated via the swing lever 8 and the linking rod 7 (operating in the forward rotation y direction. At this time, if the mixer drum 2 is rotating in the forward direction, the Since the forward rotation is accelerated, the pulses of the output signal from the sensor 12 increase, and as shown in FIG.
) is detected as follows. Therefore, due to the increased production of this pulse, the control device 11 has a mixer driver!・It is determined as normal rotation state of 2. On the other hand, if the mixer drum 2 is reversed, the operating lever 6 is in the reverse R direction, but due to the forward rotation signal from the control device 11, the electric motor 9 is rotated slightly forward through the swing lever 8 and the interlocking rod 7. As a result, the reverse rotation speed of the mixer drum 2 decreases, and the pulses of the output signal from the sensor 12 decrease, and are detected as shown in FIG. 2(,). Therefore, due to this reduction in pulse production, the control device 11 determines that the mixer drum 2 is in a reversed state.

Incidentally, in the above embodiment, the control device 11111 outputs the operation signal No. 1.4 for forward direction mowing, but forward or reverse direction can be determined in the same way even if an operation signal for reverse direction is outputted.

As described above, according to the present invention, a driven body rotatably mounted on a vehicle, a drive device for rotating the driven body in forward, reverse, increasing, and deceleration rotation, and a rotational state of the driven body can be controlled. A detection means for detecting the detection, and a control device for controlling the detection hand S and the drive device are provided, and the direction of rotation of the driven body is determined by changing the rotation speed of the driven body based on the output signal of the control device. Since the rotation speed is detected, it is sufficient to use a sensor that detects a single number of rotations, and there is no restriction on installation space, etc., and an inexpensive device can be provided.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the entire device of the present invention, Fig. 2(a)
, (b) and (C) are diagrams showing pulses.

Claims (1)

[Claims] A driven body rotatably mounted on a vehicle, a drive device for rotating the driven body forward, reverse, increasing, and decelerating;
A detection means for detecting a recirculation state of the driven body, and a control device for controlling the detection device and the drive device are provided,
11# A device for controlling the entertainment of a driven object mounted on a vehicle, which detects the rotational direction of a target object by changing the rotational speed of the target object based on an output signal of the device.