JPS642548B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention connects a front steering section and a dump truck bed section behind it so that they can rotate in a horizontal plane by a connecting pin. The present invention relates to a turning steering stabilizing device for a retractable transport vehicle that is capable of steering.

(b) Prior Art This type of conventional articulating transport vehicle has a configuration in which the steering section rotates with a connecting pin with respect to the dump loading platform by operating the handle of the steering section, and can be turned and steered. During this turning maneuver, the dump truck platform followed in an integrated manner.

(C) Problems to be Solved by the Invention Therefore, there are drawbacks such as, especially when turning to the mountain side on a slope, the center of gravity of the entire machine moves to the valley side, making it easy to overturn. It was hot.

(d) Means for solving the problems Accordingly, the present invention solves the above-mentioned problems by taking the following measures.

In other words, while the front control section and the rear dump bed section are connected by a bendable, telescopic travel drive shaft,
Connecting members extending toward the other from the control section and the dump bed are vertically overlapped, a connecting pin is provided at this overlapping portion, and the control section and the dump bed are connected in a horizontal plane around the connection pin. In a retractable transport vehicle configured to be able to rotate with
The upper dump bed of the dump bed section is connected to the lower support frame via a rotary table.
Connected by a rotation axis so as to be able to rotate in a horizontal plane so as to move the center of gravity, and an appropriate elastic body for rotation that can be forcibly rotated around this rotation axis and can be expanded and contracted.
A turning angle detection sensor is interposed between the support frame and the rotation table and is arranged at an appropriate position to detect rotation of the control section with respect to the support frame,
The control operation for extending and retracting the rotational appropriate extendable body by the turning angle detection sensor is configured in a manner that the center of gravity of the dump bed is moved in the turning direction of the aircraft body via the turning table. The present invention provides a turning steering stabilizing device for a retractable transport vehicle.

(E) Effect This allows for turning maneuvers to the mountain side on slopes.
The turning angle detection sensor detects the turning angle corresponding to the turning angle of the handle at the turning axis position, expands and contracts the rotating elastic body as appropriate, and moves the center of gravity of the dump bed around the turning axis with respect to the support frame. Since it rotates, stable turning steering is possible.

(F) Embodiments Examples of the present invention will be described below with reference to the drawings.

The rear dump loading platform 1 of the retractable transport vehicle has a rear wheel 4 mounted on both left and right sides of a support frame 2 which is approximately prince-shaped in plan view and has a boss 3 mounted at the rear of the center. The rotating shaft 5 is supported and fixed with a pin 6, and a rotating table 7 is rotatably fitted onto the upper part of the rotating shaft 5, and the protruding piece 8 on the rear upper surface of the rotating table and the rear bottom of the dump platform 9 are connected to each other. The hanging piece 10 is fixed with a horizontal pin 11, and the dump platform is supported so as to be movable up and down. The bottom surface of the dump platform 6 in front of the hanging piece 11 and the upper part of the rotary table 7 are connected by a tilting hydraulic cylinder 12 that can be extended and contracted.
As a result, the dump platform 9 and the rotating table 7 can be rotated together around the rotating shaft 5.
In addition to being able to move the center of gravity laterally to the left and right, by extending the hydraulic cylinder 12,
The dump platform 9 can be tilted rearward. In order to assist the rotation of the dump bed around the rotation axis 5, a guide 13 having an arcuate groove centered on the same axis is fixed to the front bottom of the dump bed, and a fitting pin 14 erected on the support frame 2 The mating is guided.

Further, the forced rotation of the rotary table 7 is performed by an appropriate extensible body 15 for rotation, such as a hydraulic cylinder, interposed between the support frame 2 and the rotary table 7. Note that the extensible body 15 is configured to be switchable between manual control and automatic control. Therefore, if it is set to the manual side, the dump platform 9 can be manually rotated around the rotation axis 5 via the rotation table 7, and the dump platform 9 can be tilted at that position, so that the loaded material can be unloaded. It has the advantage of being able to manually change the direction and expanding the work range.

Next, there is a control section 16 in front of the dump bed section 1, and the two 1 and 16 are connected by a connecting member 17 extending forward from the support frame 2 and a connecting member 18 extending backward from a transmission case 28, which will be described later. The U-shaped members formed at each butting end of the U-shaped member and the fitting member fitted inward are fitted in an overlapping manner, and the connecting pin 19 is inserted in the vertical direction into this overlapping portion, thereby connecting the connecting pin 19 and the connecting member. This is done by fixing the fitting member 17 with a pin 6. Therefore, the control section 16 and the dump platform section 1 are rotatable within the horizontal plane around the connecting pin 19,
This makes steering possible. Further, since the connecting pin 19 is fixed to one side, like the rotation shaft 5 described above, the rotation angle (rotation angle) can be determined from the relationship with the other side.

The steering unit 16 is equipped with a handle 20, a seat 21, an engine 22, etc., of which the handle 20 is installed on the side of the dump platform 1 from the steering mechanism 24 consisting of a pitman arm 23 etc. It is connected to the arm 25 by a connecting rod 26. As a result, when the handle 20 is turned, each of the above-mentioned members is activated, and the steering section 16 and the dump platform section 1 can be bent around the connecting pin 19.

The power of the engine 22 is transmitted to the support shaft 27 in the longitudinal direction.
The signal is transmitted to the mission case 28 which is freely rotatably supported around the transmission case 28, and is further transmitted to the axle 30 of the front wheel 29 of the control section 16. In addition, at the center of this axle 30,
The differential device is differential gear case 31
(hereinafter referred to as the differential case 31), the steering operation is performed using this method.

In addition to these, on the control unit 16 side, there is a telescopic operation lever 32 that performs telescoping operation of the cylinder 12;
A gear shift lever 33 for shifting gears inside the transmission case 28, a clutch, and brake pedals 34 are provided.

By the way, as mentioned above, the turning angle detection sensor 35 is arranged in relation to the connecting pin 19 that can detect the turning angle, and when the handle 20 is operated, the dump loading platform 1
On the other hand, the steering unit 16 at the position of the connecting pin 19 outputs the opposite positive and negative turning angles when turning to the right or to the left based on straight running as an electrical analog quantity, and outputs this sensor signal as an electrical analog quantity. Also,
The data is sent to the controller 36 via the positive/negative discrimination circuit 37, and after calculation and adjustment are made there, the rotational expansion/contraction body 15 is actuated as appropriate by the solenoid valve 38, and the rotation shaft 5 is
The dump platform 9 is rotated through the rotary table 7,
It rotates to the turning side of the aircraft to stabilize it, moving the center of gravity,
The structure is designed to stabilize cornering. For example, if you are driving straight on a slope with the mountain side on your right hand and turn the steering wheel 20 clockwise and turn right at a turning angle A as shown in FIG. The A angle is detected by the turning angle detection sensor 35.
is detected and sent as a sensor signal to the controller 36 as described above, and from there, the telescopic body 15 for rotation is controlled to retract as appropriate via the corresponding solenoid valve 38 according to a command signal, and the rotation axis is The dump bed 9 is rotated clockwise by an angle B through the rotation table 7 (see the two-dot chain line in Fig. 2), and as a result, the center of gravity moves from G1 to G2 and turns stably. It can be done. In the opposite case, that is, in the case of a left turn, the extensible body 15 for rotation will extend as appropriate, and the center of gravity will move in the opposite direction. In addition,
The location of the turning angle detection sensor 35 is not limited to the position of the connecting pin 19, but may be any location where the turning of the control section 16 relative to the support frame 2, such as the pitman arm 23, can be detected.

In the figure, 39 is a differential case, and 40, 41 are bending joints (40, 41) located slightly outside of the respective differential cases 31, 39 due to the relationship between the control section 16 and the dump truck bed section 1 being bent and rotated around the connecting pin 19. In addition to being bendable via universal joints 42 and 43, the central end of the drive shaft is fitted inward and outward by spline fitting, etc., to make it extendable and retractable.

(G) Effects of the Invention According to the present invention having the above configuration, the dump bed 6 is attached to the rotating table 7, and this rotating table is connected to be rotatable around the rotating shaft 5. When the dump bed 6 is rotated around the rotation axis together with the rotation table 7, the center of gravity is moved, and the rotation accompanied by this movement of the center of gravity is controlled by the rotation angle detection sensor 35 to extend and retract the elastic body 15 as appropriate for rotation. Since the relevant configuration is such that the direction of the aircraft's turn is determined by the operation, the center of gravity can be moved to ensure stable turning maneuvers during turning maneuvers, improving safety. .

[Brief explanation of drawings]

Fig. 1 is a side view showing a refraction type transport vehicle embodying the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a partial sectional view showing the area around the traveling work axis, and Fig. 4 is a view from the turning angle detection sensor. FIG. 2 is a block diagram showing means for controlling the expansion and contraction of the rotational expansion and contraction body according to the signal of FIG. (Symbol), 1...Dump loading platform, 2...Support frame, 5...Rotation shaft, 7...Rotary table, 9
... Dump loading platform, 15 ... Appropriate elastic body for rotation, 1
6... Control section, 17, 18... Connection member, 19...
...Connecting pin, 35...Turning angle detection sensor, 4
0,41...Traveling drive shaft.

Claims (1)

[Claims] 1. The front control part 16 and the rear dump bed part 1 are connected by bendable and telescoping travel drive shafts 40, 41, and each of the control part 16 and dump bed part 1 extends toward the other. The bending type transportation has a configuration in which the connecting members 17 and 18 are overlapped vertically, a connecting pin 19 is provided at this overlapping part, and the control section 16 and the dump platform 1 can be rotated in a horizontal plane around the connecting pin 19. In a vehicle, the dump bed 9 above the dump bed 1 is connected to the lower support frame 2 via a rotary table 7 by a rotation shaft 5 so as to be rotatable in a horizontal plane so as to move the center of gravity. An appropriate rotational expansion and contraction body 15 that can be connected and forcibly rotated around the rotation axis 5 is interposed between the support frame 2 and the rotary table 7. A turning angle detection sensor 35 for detecting the turning of the section 16 is disposed at an appropriate position, and the extending and retracting body 15 for rotation is controlled by the turning angle detecting sensor 35 via the rotary table 7 to detect the turning of the aircraft body. 1. A turning steering stabilizing device for a refraction type transport vehicle, characterized in that the device is configured to move the center of gravity of the dump platform 9 in the direction shown in FIG.