JP2526814Y2 - Working device mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a hydraulically driven working device such as a front loader or a backhoe device to a working vehicle such as a tractor or a transport vehicle.

[0002]

2. Description of the Related Art A working device of this kind is disclosed in Japanese Utility Model Laid-Open No. 1-747.
No. 10 is connected to and supported by mast members attached to the left and right sides of the fuselage, like a front loader mounted on the front of a tractor, and the front loader is attached to the fuselage by assembling and removing these mast members. It can be attached and detached. And, a control valve for bucket tilt with an operation lever and a control valve for boom lifting and lowering,
It was mounted on the mast member on the right side and was designed to be attached to and detached from the fuselage integrally with the front loader.

[0003]

According to the above-mentioned prior art, there is a convenience in that a drive operating portion composed of a control valve and its operating lever is detachably mounted by attaching / detaching the working device. For the user who replaces and uses a wide variety of working devices or for a leasing company, the duplication of the drive operation unit becomes mechanically useless, and the burden is also increased in cost because it is necessary to prepare the parts. was there. An object of the present invention is to enable the above disadvantages to be improved.

[0004]

A feature of the present invention for achieving the above object is that the self-propelled body is provided at a substantially central position in the front-rear direction of the fuselage frame along the lateral width direction of the self-propelled body. Along with a detachably mounted overhanging frame that projects toward one side, a connecting portion to which a hydraulically driven working device is detachably connected is formed at a laterally outer end of the overhanging frame, and A stand provided with a control valve for operating the working device is arranged inside the connecting portion of the overhang frame.

[0005]

According to the characteristic structure of the present invention, the connection of the working device to the body frame is performed through the overhang frame,
The overhang frame is equipped with a control valve for operating the work equipment, so even if the work equipment is removed from the aircraft frame by removing it from the overhang frame, the control valve for operating the work equipment is attached to the airframe. It can be left in the state of being left.
In other words, when another working device is attached after the working device is removed from the overhang frame, the control valve left on the body frame can also be used as a control valve for operating another working device. In addition, since the overhang frame is detachably mounted to the body frame, the overhang frame can be removed from the body frame when there is no need to connect a working device to the body, Also, the control valve for operating the working device can be removed from the body frame.
That is, the self-propelled body can be brought into a light state. Moreover, by equipping the overhanging frame at a substantially central position in the longitudinal direction of the body frame of the self-propelled body, the working device connected via the overhanging frame can be stably supported by the self-propelled body. become. In addition, since the control valve for operating the operating device provided on the stand of the overhang frame can be brought close to the operating portion located substantially at the center of the self-propelled body in the front-rear direction, the operating device can be controlled by the operating portion of the self-propelled aircraft. Can be easily operated from In addition, in the overhang frame, since the stand equipped with the control valve for working device operation is arranged inside the connecting portion to which the working device is connected,
With the working device connected to the connecting portion, damage due to contact with another object of the control valve can be suppressed.

[0006]

Therefore, the working device is attached to the machine body via the overhanging frame, and the overhanging frame is equipped with a control valve for operating the working device. Because it can be used for two or more purposes, inconveniences such as mechanical waste and cost increase can be improved. In addition, by devising the arrangement of the overhanging frame, and the mounting position of the working device and the arrangement of the control valve on the overhanging frame, the stability of the self-propelled body with the working device connected, and the control unit In addition to improving the operability of the working device, the control valve can be protected.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows an agricultural tractor. This agricultural tractor has an engine 2 mounted above the front portions of a pair of right and left body frames 1 and 1 extending over substantially the entire length of the body in the front-rear direction, and has a transmission case 3 at the rear of the body.
The power of the engine 2 is supplied to the front and rear wheels 4 and 5 via the transmission case 3 to drive the vehicle, and the front loader device 6 which is an example of a hydraulically driven working device is mounted on the front of the fuselage. I have. Each aircraft frame 1,1
With the rear part positioned lower than the front part, the intermediate connecting parts 7, 7 are bent and formed in a stepwise manner, and the axle of the front wheel 4 provided with the steering mechanism is maintained at a predetermined height. By lowering the position of the driving section 8 at the rear of the aircraft as much as possible, the steering stability of the aircraft can be improved.

Next, the connection structure of the front loader device 6 will be described. As shown in FIGS. 1 and 2, a support member 9, which is formed by bending a plate material, is laterally connected to the lower surfaces of the intermediate connection portions 7, 7 of the left and right body frames 1, 1. Are protruded in the left-right lateral direction from the respective body frames 1, 1, and the rear portions of the protruding portions 9a, 9a are bent and formed upward. In other words, the support member 9 is fixed to the plate members in a state of being bent along the lower surfaces of the intermediate connecting portions 7, 7 of the body frames 1, 1, and is fixed by welding. The edge is welded and fixed to the side surfaces of the body frames 1 and 1. An overhang frame A for connecting the front loader device 6 is detachably attached to each of the left and right protrusions 9a, 9a of the support member 9.

The overhang frame A will be described in detail.
The overhanging frame A is formed by bending a lower frame 11 having an upwardly open U-shape, which is bolted and fixed to the protruding portion 9a, and externally fitted to cover the opening of the lower frame 11. It is formed in a box shape by connecting to an upper frame 10 which is bent and formed in a downwardly open U-shape. Each upper frame 10 extends laterally outward of the fuselage, and
On the upper surface of the extension end of the upper frame 10 which is the lateral outer end of the upper frame 10, there is formed a connecting portion 13 to which the left and right masts 12 of the front loader device 6 are removably inserted and connected. The connecting portion 13 is formed by a U-shaped frame 13a welded and fixed to the upper frame 10, and a wedge-shaped receiving member 13b is attached to the inside thereof. On the other hand, the lower end of the mast 12 is formed in a tapered shape to fit into the receiving member 13b.

At the upper and lower middle positions of the left and right masts 12, a connecting fixture 14 is fixedly mounted. The arms 16, 16 are connected. The front ends of the support arms 16, 16 are connected by a connecting pipe 17, and the connecting pipe 17 is connected to and supported by the supporting portion 15. As shown in FIG. 1, the support portion 15 includes brackets 15a, 15a attached to and fixed to the front side lateral surfaces of the left and right body frames 1, 1, and receiving seats 15b, 15b welded to the brackets 15a, 15a. Catch 15b, 1
The connecting pipe 17 is placed on 5b and connected by bolts. A front loader device 6 is provided at the upper end of the mast 12.
Of the boom 18 over a bracket plate 19 in the middle part of the boom 18 and a pivot part 20 in the middle part below the mast 12,
And a bucket 22 for tilting the bucket.

As shown in FIGS. 1 and 2, a stand 24 made of a plate material is provided inside the connecting portion 13 of the upper frame 10 on the right side.
A control valve 26 for operating the elevating cylinder 21 operated by a single operation lever 25 and a control valve 27 for operating the tilt cylinder 23 are provided. Then, each cylinder 21, 22
The supply / discharge hose 28 of No. 3 and a hose 30 for connection to a hydraulic device on the machine side are connected to control valves 26 and 27. That is, the front loader device 6 is attached to the machine body via the left and right overhanging frames A, A, and when replacing with another working device, the mast 12 is attached to and detached from the overhanging frame A, and each of the cylinders 21, The operation of attaching / detaching the supply / discharge hose 23 to / from each of the control valves 26 and 27 is performed.

FIG. 3 shows a hydraulic circuit of the tractor. Reference numeral 32 denotes a lift cylinder for raising and lowering a link mechanism (not shown) provided at the rear of the machine body.
Reference numeral 4 denotes a control unit, 35 denotes a front wheel speed increasing circuit unit, and 36 denotes a hydraulic pump, which is a hydraulic take-out block 38 provided between the hydraulic pump 36 and the flow priority valve 37.
In addition, the supply / discharge hose 30 on the pressure oil supply side is configured to be attached and detached.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a detachable structure of a working device.

FIG. 2 is an exploded perspective view of a main part showing a mounting structure of a mast and a mounting bracket.

FIG. 3 is a hydraulic circuit diagram

FIG. 4 is a side view of the tractor with the working device mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airframe 6 Working device 13 Connecting part 24 Stand 26 Control valve 27 Control valve A Projection frame

Claims (1)

(57) [Scope of request for utility model registration] 1. A self-propelled body in a body frame (1).
At the approximate center position in the front-rear direction, the horizontal width direction of the self-propelled body
Overhanging frame that extends outward along the
(A) is detachably equipped, and
Hydraulically driven working device at the lateral outer end of the arm (A)
(6) forms a connecting portion (13) to be detachably connected
And the link in the overhang frame (A)
Inside of the connecting part (13), for operating the working device (6)
Stand (2) equipped with control valves (26) and (27)
The mounting structure of the working device in which 4) is disposed .