JPH0215704Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a hydraulic pressure extraction device for a tractor.

<Conventional technology> A tractor is equipped with a hydraulic device for lifting and lowering the work equipment on the rear of the vehicle body, and a pair of left and right lift arms that can be rotated around an axis in the left and right direction are protruded from the left and right sides of the hydraulic device. A mounting base is provided on the upper part of the rear part of the vehicle body and/or on the rear surface of the hydraulic system, and a top ring is provided on the mounting base so as to be rotatable about the axis in the left and right direction, and a top ring is provided on the mounting base to allow pressure oil to be taken out to the outside of the hydraulic system. Some models are equipped with a pair of left and right hydraulic pressure extraction devices.

In the above-mentioned tractor, a hydraulic cylinder of a working machine mounted on the tractor is connected to the hydraulic pressure take-out portion via a hydraulic hose or the like.

By the way, in the past, in order to avoid interference between the oil pressure take-out part and the top spring or lift arm, the oil pressure take-out part was provided directly on the hydraulic device, and the oil pressure take-out part was made to protrude almost rearward from the hydraulic device. I wasn't there.

<Problems to be solved by the invention> For this reason, in the past, when attaching or detaching a hydraulic hose etc. on the work equipment side to the hydraulic outlet, lift arms, top springs, etc. that protrude rearward from the hydraulic system or vehicle body have The mounting base has been a major obstacle, making the above-mentioned attachment/detachment work difficult.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulic pressure extraction device for a tractor that allows easy attachment and detachment of a hydraulic hose, etc. to a hydraulic pressure extraction portion, and eliminates the risk of interference with a lift arm or top ring.

<Means for solving the problems> In order to achieve the above object, the features of the present invention are as follows:
Equipped with a support 40 on the rear surface, the support 40 has
A pair of left and right equipment parts 42, each equipped with a hydraulic pressure extraction part 46, 47, are provided in a rearwardly protruding manner.
and each hydraulic pressure take-out part 46, 47, the top spring 27
and the rotation range of each lift arm 33.

<Embodiment> Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIGS. 1 to 3, 1 is a tractor body, which is composed of an engine, a transmission case 2, etc. A rear axle case 4 projects from both sides of the rear part through a brake case 3. Reference numeral 5 denotes a hydraulic system for lifting and lowering the working machine, which is mounted on the rear part of the vehicle body 1. A hydraulic control valve 6 controls the hydraulic system 5.

Reference numeral 7 denotes a pair of left and right rear wheel fenders that cover the rear wheels.The front midway portions of both fenders 7 in the height direction are connected by a front cross beam member 8, and the upper and lower ends of the rear portions of both fenders 7 are connected to the rear upper and lower ends. They are connected by front and lower cross beam members 9 and 10, respectively.

Reference numeral 12 denotes a gate-shaped bracket fixed to the mission case 2, and a horizontally long front support member 13 protruding from both sides is fixed to the bracket 12. A front cross beam member 8 is supported on both sides of the front support member 13 via a pair of upper and lower elastic members 14 .

As shown in FIG. 4, a rear support member 16 is fitted and fixed to the upper end of the hydraulic device 5, and a laterally elongated receiving member 17 that protrudes to both sides is fixed to the upper surface of the rear support member 16. A rear lower cross beam member 10 is supported on both sides of the receiving member 17 via a pair of upper and lower elastic members 18 .

A seat 20 is supported by front and rear support members 13 and 16 via a mounting device 21.

A floor sheet 22 covers the transmission case 2 from above and is fixed to the front cross beam member 8.

Reference numeral 23 denotes a fuel tank, which is located on the rear side of the seat 20 in the hydraulic system 5 and closes the space between the rear wheel fenders 7, and also connects the rear upper and rear lower cross beam members 9, 10.
installed on.

Reference numeral 25 denotes a three-point linkage mechanism for attaching the working machine to the tractor, and is composed of a pair of left and right lower rings 26 and a single top ring 27 in the center.

28 is a mounting base, which is fixedly installed on the rear surface of the hydraulic device 5;
The top spring 27 is attached to the left and right transverse axis 29 at the front end.
It is supported so that it can rotate freely. 30 is a ball joint.

A pair of left and right support tubes 31 protruding from both sides are fixedly installed at the upper part of the rear part of the hydraulic device 5.
An arm shaft 32 that is rotated by a hydraulic cylinder of a hydraulic device 5 is supported on the arm shaft 1 . The arm shaft 32 protrudes from both sides of the support cylinder 31.

33 is a pair of left and right lift arms, arm axis 3
The front end is fixedly attached to the outer end of 2. The lift arms 33 are shaped to protrude rearward beyond the hydraulic device 5, and are inclined in the front-rear direction so as to move outward toward the rear end, and both lift arms 33 have a so-called V-shape. It is said that Each lift arm 33 is connected to each lower ring 26 via a lift rod 34 to raise and lower the working machine.

Reference numerals 36 and 37 denote first and second auxiliary hydraulic control valves, which are laterally connected to the front left side surface of the hydraulic device 5. Pressure oil is supplied from the hydraulic control valve 6 to these auxiliary hydraulic control valves 36 and 37, and each control valve 3
6 and 37 are the first and second auxiliary hydraulic control levers 3
8,39.

As shown in FIGS. 5 and 6, reference numeral 40 denotes a substantially gate-shaped support in plan view, which includes a mounting portion 41 arranged in the left-right direction and a support protruding rearward from both ends of the mounting portion 41. A pair of left and right equipment parts 42 and both equipment parts 4
and a plate-shaped connecting member 43 that connects substantially central portions of the two parts in the front-rear direction to prevent vibration of the equipment part 42. The mounting portion 41 has a U-shaped cross section that opens toward the rear, and the equipment portion 42 has a U-shaped cross section that opens toward the inside. The mounting portion 41 is removably fastened together with the rear support member 16 by bolts 44 to the rear surface of the hydraulic device 5. The equipment portion 42 is provided to protrude rearward from the mounting base 28, and is inclined with respect to the front-rear direction so as to move outward toward the rear end. Each end of the connecting member 43 is fixed to the inner surface of the top wall of each equipment part 42, and the top ring 2
7 so that it does not interfere with the rotation of the top ring 27.

46 and 47 are the first ports for taking out the pressure oil to the outside.
The second hydraulic pressure extraction section is detachably attached to the rear outer surface of each of the left and right equipment sections 42 with bolts 48 . Each hydraulic pressure extraction section 46, 47 is provided with a pair of upper and lower female coupler sections 49. , 37 by a pair of first and second hydraulic hoses 51 and 52. A male coupler 54 of a hydraulic hose 53 on the working machine side is detachably connected to the female coupler section 49, and the coupler section 49 and the coupler 54 constitute a self-seal type quick-disconnect type pipe joint. be done.

Each equipment section 42 and each hydraulic pressure extraction section 46, 4
7 is located between the rotation range of the top ring 27 and the rotation range of each lift arm 33 so that these do not interfere with the top ring 27 or the lift arms 33.

Reference numeral 55 denotes a rod-shaped guide fitting, which is installed along the mounting portion 41 of the support 40 and the upper surface of the rear support member 16, and its both ends are bent downward to connect each support cylinder 31.
It is fixedly installed. The first and second hydraulic hoses 51 and 52 are inserted into the space created by both ends of the guide fitting 55 and the hydraulic device 5 side.

According to the embodiment configured as described above, a pair of left and right equipment parts 4 protruding rearward are provided on the rear surface of the hydraulic device 5.
2, each equipment part 42 is provided with each hydraulic pressure take-out part 46, 47, and each hydraulic pressure take-off part 46, 47 is made to protrude rearward than before, so that each hydraulic pressure take-off part 46, Hydraulic hose 5 to 47
3, the lift arm 33, the top ring 27, and its mounting base 28 do not become much of an obstacle, and the above-mentioned attachment and detachment work can be easily performed.

FIG. 7 shows a seat belt 57 and an instrument panel 58.
The male lock part 59 and the female lock part 60 of the seat belt 57 are connected to an inverter with conductive wires 61, and both lock parts 59,
When 60 is engaged, an OFF signal is output from the inverter and the seatbelt fastening signal is displayed on the instrument panel 58.
I'm trying to turn off the OK Chetsuka 62 light.

In the example, the mounting base and support were attached to the hydraulic system, but these could be attached to the rear rear of the vehicle body or
It may be installed at the upper part of the rear part of the vehicle body and at the rear of both the hydraulic system.

<Effects of the invention> As detailed above, the present invention includes a support having a pair of left and right equipment parts that protrude rearward on the upper part of the rear part of the vehicle body and/or the rear surface of the hydraulic system, and each equipment part has a hydraulic system. The lift arm,
The top spring and its mounting base do not pose much of an obstacle, and the above-mentioned attachment and detachment can be easily performed. In addition, each equipment part and each hydraulic pressure extraction part are arranged between the rotation range of the top ring and the rotation range of each lift arm, so each equipment part and each hydraulic pressure extraction part are located between the top spring and the rotation range of each lift arm. There is no risk of interference with the lift arm. The present invention has the above advantages and is of great practical benefit.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the main parts, FIG. 2 is a partially sectional side view of the rear part of the tractor, FIG. Each figure in Fig. 5 is a sectional view taken along the lines A-A and B-B in Fig. 1, Fig. 6 is a view taken in the direction C in Fig. 1, and Fig. 7 shows the instrument panel and seat belt. FIG. DESCRIPTION OF SYMBOLS 1...Tractor body, 5...Hydraulic system for lifting and lowering work equipment, 27...Top link, 28...Mounting base, 33...
Lift arm, 40... Support, 41... Mounting part,
42...equipment part, 43...coupling material, 46, 47...first and second hydraulic pressure extraction parts.

Claims (1)

[Scope of utility model registration request] A hydraulic device 5 for lifting and lowering the work machine is mounted on the rear of the vehicle body 1, and a pair of left and right lift arms 3 are provided on both the left and right sides of the hydraulic device 5, and are rotatable around an axis in the left and right direction.
3 in a rearward projecting shape, and the upper part of the rear part of the vehicle body 1 and/or
Alternatively, a mounting base 28 is provided on the rear surface of the hydraulic device 5, and a top link 27 is provided on the mounting base 28 so as to be rotatable around the axis in the left and right direction, so that external pressure can be applied to the upper part of the rear portion of the vehicle body 1 and/or the hydraulic device 5. In a vehicle equipped with a pair of left and right hydraulic pressure take-off parts 46 and 47 for taking out oil, a support 40 is provided at the upper part of the rear part of the vehicle body 1 and/or the rear surface of the hydraulic device 5, and the support 40 has hydraulic pressure take-off parts 46 and 47, respectively. A pair of left and right equipment parts 42 to be equipped are provided in a rearwardly protruding shape, and each equipment part 42 and each hydraulic pressure extraction part 46, 47 are arranged between the rotation range of the top ring 27 and the rotation range of each lift arm 33. A hydraulic extraction device for a tractor, characterized in that: