JPH0511744Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an outrigger operating section for a working vehicle, which is provided with hydraulic outriggers on the left and right sides of the machine, and is equipped with a hydraulic operating device for separately grounding these outriggers. .

[Conventional technology]

As shown in Fig. 5, the outrigger operating parts of this type of work vehicle are
A and 25B are separate hydraulic operating devices v ₁ and v ₂ respectively.
It was common to have a configuration in which each could be operated independently and grounded separately.

[Problem that the invention attempts to solve]

However, the outrigger operating section of a typical work vehicle is simple and only switches between grounding and storage, and there is little need to operate the left and right outriggers with separate hydraulic operating devices. Moreover, since two hydraulic operating devices are used, the cost is rather high, which is disadvantageous.

The present invention was devised by paying attention to these circumstances, and its purpose is to reduce costs while maintaining the function of separately grounding the left and right outriggers.

[Means for solving problems]

The characteristic configuration of the present invention is that the hydraulic operating device consists of a single 4-position switching valve, and in this valve, the first and second operating positions, which ground the left and right outriggers separately, are distributed on either side of the neutral position. At the same time, a third operating position for storing both the outriggers at the same time is disposed outside one of the first and second operating positions, and its functions and effects are as follows.

[Effect]

In other words, a single 4-position switching valve serves as the hydraulic operating device for the left and right outriggers, and in order to ground the left and right outriggers, first operate the valve from the neutral position to the first operating position. to ground one of the left and right outriggers, then operate the valve from the first operating position to a second operating position on the other side of the neutral position to ground the other left and right outriggers, and then return to the neutral position. Also,
When storing the left and right outriggers, the valve is operated to a third operating position located outside of either the first or second operating position, and the left and right outriggers are simultaneously stored.

[Effect of idea]

As a result, it became possible to ground the left and right outriggers separately using a single valve, resulting in lower costs. Moreover, the valve is a 4-position switching type in which the first and second operating positions are arranged on both sides of the neutral position, and the second operating position is arranged outside of the neutral position. Switching operations between the two can also be performed without error by using only the neutral position.

〔Example〕

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

As shown in Fig. 4, it is equipped with left and right front wheels 1, 1 that can be driven and rotated freely, and an arm 2 that can be operated to vertically swing relative to the vehicle body using a hydraulic cylinder 2a, and an arm 2 that can be operated vertically relative to the vehicle body using a hydraulic cylinder 3a. A front vehicle body 21 is provided with a shovel device 4 consisting of a bucket 3, etc., and is equipped with left and right rear wheels 5, 5 that can be driven and rotated, and an engine 7 is mounted below the driver's seat 6, and a driving transmission is provided. Connect the case 8 to the front of the engine 7, and connect the case 8 to the rear of the engine 7.
A radiator 9 is provided. Furthermore, there is a mounting base 10 that can freely slide left and right with respect to the vehicle body and can freely swing horizontally with respect to the vehicle body, a boom 11 that can swing the mounting base up and down with a hydraulic cylinder 11a, and a hydraulic cylinder 12a.
A backhoe device 14 includes an arm 12 that can be operated to swing up and down relative to the boom with a hydraulic cylinder 13a, a bucket 13 that can be operated to swing up and down the arm relative to the boom with a hydraulic cylinder 13a, etc.
A rear vehicle body 22 is provided behind the driver's seat 6. The front vehicle body 21 and the rear vehicle body 22 are connected to each other so as to be relatively rotatable around the longitudinal axis Y, and are pivotally supported around the vertical axis X so that the two vehicle bodies can be relatively oscillated. Left and right hydraulic cylinder 15,
15 is installed between both vehicle bodies, and the left and right hydraulic cylinders 1
A steering handle 17 for rotating an orbiter 16 for telescopically operating the motors 5 and 15 is provided on the rear vehicle body 22, and the driver's seat 6 is mounted so as to be changeable in direction forward and backward.
An operating section 4A for the front loader device 4 and a backhoe device 14 are provided in front and behind the driver's seat 6, respectively.
An operating section 14A is provided for the driver's seat 6.
The working vehicle is configured to carry out the work of scooping up, transporting and discharging earth and sand with the driver's seat 6 facing forward, and to perform the work of excavating a trench etc. with the driver's seat 6 facing backward.

Outriggers 25A and 25B equipped with hydraulic cylinders are provided on both the left and right sides of the mounting base 10, and a four-position switching valve V is provided to extend and retract these outriggers 25A and 25B, and an operating lever 26 for operating this valve is provided. The operation section 14A
The left and right outriggers 25A and 25B can be grounded separately by swinging one operation lever 26.

Incidentally, since the front body 21 is connected to the rear body 22 so as to be able to roll freely, on a slope, the outriggers 25A and 25B are grounded to connect the rear body 22.
Even if the front vehicle body 21 is corrected to a horizontal position, the front vehicle body 21 maintains an inclined position along the slope (see FIG. 2).

As shown in FIG. 1, the hydraulic circuit of the outrigger operating section includes the left and right outriggers 25A,
The valve V is interposed between three oil passages communicating with B and two oil passages communicating with pump P and tank T. In this valve V, on both sides of the neutral position N, there is a first operation position F ₁ in which only the left outrigger 25A is extended and operated;
A second operation position F 2 in which only the right outrigger 25B is extended is arranged separately, and a third operation position in which _{the left and right outriggers F 1 and F 2 are} simultaneously housed outside the second operation position F 2.
F ₃ is placed.

Therefore, when the left and right outriggers 25A, 25B are to be grounded, the operating lever 26 is first swung to switch the valve V from the neutral position N to the first operating position _F1 , and the left outrigger 25A is extended. and ground it. After confirming the grounding, swing the operating lever 26 to the opposite side to move the valve V to the first position.
Switch from the operating position F ₁ to the second operating position F ₂ and extend the right outrigger 25B to touch the ground. And left and right outriggers 25A, 25B
After confirming that the valve has touched the ground, return the operating lever 26 to switch the valve V to the neutral position N. Of course,
It is also possible to ground the right outrigger 25B first.

In addition, when storing the left and right outriggers 25A and 25B, once the operation lever 26 is tilted sideways and then operated to swing, the valve V is switched from the neutral position N to the third operation position _F3 , and the left and right outriggers 25A and 25B are retracted.
5A and 25B are simultaneously contracted and entangled. After retracting, the operating lever 26 is swung to return the valve V to the neutral position N.

As shown in FIG. 3, the guide plate 27 of the operating lever 26 has a groove 27b that guides the operating lever 26 when switching the valve V from the neutral position N to the third operating position _F3 , and a main guide groove 27a. It is formed separately from an intermediate position to prevent the operating lever 26 from entering the third operating position _F3 with excessive force when swinging the operating lever 26 to the second operating position _F2 .

Reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, but the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the outrigger operating section of a working vehicle according to the present invention, and FIG. 1 is a hydraulic circuit diagram, FIG. 2 is a rear view of the working vehicle when the outrigger is in contact with the ground, and FIG. 3 is an operating lever and its guide plate. Figure 4 is an overall side view of the working vehicle, and Figure 5 is a conventional hydraulic circuit diagram. It is. 25A, 25B... Outrigger, F ₁ ... First operating position, F ₂ ... Second operating position, F ₃ ... Third operating position.
Operation position, V...Valve.

Claims (1)

[Scope of utility model registration request] Hydraulic outriggers 25A and 25B on the left and right sides of the aircraft
This is an outrigger operating section for a working vehicle, which is provided with a hydraulic operating device for separately grounding these outriggers 25A and 25B, and the hydraulic operating device is composed of one four-position switching type valve V, and this valve V , left and right outriggers 25A,
1st and 2nd operation positions to ground 25B separately
F _{1 ,} F ₂ are distributed and arranged on both sides _of the neutral position, and both outriggers 25A,
An outrigger operating section of a work vehicle in which a third operating position F ₃ that simultaneously stores 25B is located.