JPS623308Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hydraulic pressure extraction device for a traveling work vehicle, and is capable of easily extracting hydraulic pressure from the hydraulic equipment of front loaders and other front-mounted or belly-mounted working machines. purpose.

In large traveling work vehicles such as wheeled tractors, it is extremely difficult to extract hydraulic pressure from hydraulic equipment such as front loaders, and the structure becomes complicated.

In other words, in addition to the ingress/egress steps and wheel fenders becoming an obstacle, there is a tendency for cabins surrounding the control and hydraulic systems to be installed upright on the vehicle body in order to improve comfort and maneuverability. However, it is considered difficult to take out the hydraulic pressure, and even if it were to be taken out, the structure would become complicated and the matching work with hydraulic equipment would be troublesome.

This invention was devised to solve the above-mentioned problems and inconveniences, and is equipped with steps for getting on and off on both sides of the vehicle body, a hydraulic system for work equipment mounted on the rear of the vehicle body, and a control system and hydraulic system installed at the rear of the vehicle body. In a traveling work vehicle in which the device is surrounded by a cabin, an auxiliary hydraulic control device is provided on one side of the hydraulic device, and a hydraulic pressure take-off pipe connected to the control device is extended to the front of the vehicle body. The oil pressure outlet pipe is characterized in that the outlet is exposed in front of the passenger step and the cabin, and the hydraulic outlet pipe is supported on the vehicle body using a support.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2, numeral 1 is a traveling work vehicle shown as a two-axle, four-wheel tractor, numeral 2 is a front wheel, and numeral 3 is a rear wheel. Reference numeral 4 denotes an engine, which is mounted near the front of the vehicle body, and a clutch housing 5 and a transmission case 6 are successively connected to the rear surface of this engine to form a vehicle body 7.

Reference numeral 8 denotes a hydraulic system for a working machine, which has a pair of left and right lift arms 9, and is mounted on the rear upper surface of the vehicle body 7.

Reference numeral 10 denotes a control device, which includes a seat 12 provided above the hydraulic device 8 via a floor seat 11, and a handle device 13 erected in front of the seat 12 in a backward-slanting manner.
It is composed of etc.

Reference numeral 14 denotes a pair of left and right horizontal frames, each of which is a long groove-shaped member having a fender mounting base 15 at the rear and a support for the vehicle body 16 at the front. Fastener 1 to axle box 17
In addition, the support 16 is attached to the clutch housing 5 via horizontal and vertical fasteners 19 and 20 as shown in the fourth figure, and the horizontal frame 14 is attached to the lower belly surface of the vehicle body. A desired space 21 is formed between the housing 5 and the support 16.

22 is a pair of left and right getting on/off steps;
As shown in FIG.
5, and fasteners 26, etc., on both sides of the front side of the horizontal frame 1.
Further, the rear part of the step 22 is attached to the horizontal frame 14, the vehicle body 7, etc. with fasteners not shown in the drawings, and a desired width long in the direction of travel is attached to the horizontal plane. A step 22 is provided.
27 indicates an auxiliary step.

28 is a fender, installed inside the rear wheel 3,
Its lower part is attached to the mounting base 15 with a fastener 29, and the front lower part is attached to the outer surface of the horizontal frame 14 with a fastener (not shown).

The cabin 30 has a pair of left and right doors 31, the lower surface of which is in contact with the outer peripheral surface of the fender and the upper surface of the step, and a pair of left and right front columns 32.
are fastened together to the fitting 24 with a fastener 26 as shown in the fourth figure, and the cabin 30 is attached to the control device 1 here.
It is erected to surround the entirety of 0.

33 is an auxiliary hydraulic control device, and as shown in FIG.
A switching spool valve 35 is inserted therein.

The valve 35 of the control box 34 supplies and relays pressure oil from the hydraulic device 8 to the hydraulic pressure outlet pipe 37 connected via the connector 37A by rotating the operating lever 36 back and forth, and its configuration itself is conventional. That's right.

The hydraulic pressure outlet pipe 37 extends downward along the side of the vehicle body 7 and then extends from the side of the vehicle body 7 to the step 22.
The second
As shown in FIG.
2. The outlet 38 at the extending end, which is exposed forward from the front of the cabin 30, has a screw hole structure, and is normally plugged with a screw plug 39.

This extraction pipe 37 is preferably a metal pipe such as a copper pipe, but may of course be a hard plastic pipe or the like.

40 is a tube support, as shown in FIGS. 2, 3 and 5.
As shown in the figure, a base plate 43 is attached downward to the boss portion 41 of the vehicle body 7, that is, the clutch housing 5, the flywheel housing 5A, etc., via a fastener 42, and the extraction pipe 37 is brought into contact with the outside of this base plate 43. At the same time, the outside of the tube 37 is supported by being clamped by a holding tool 46 which can be taken out with a fastener 45 via a collar 44. Of course, this pipe support 40
may support a plurality of locations in the longitudinal direction of the take-out pipe 37, or may support a part of the take-out port 38 as shown in the figure.

Additionally, in the figure, reference numeral 47 is a hydraulic pump, which is driven by the engine 4, sucks up hydraulic oil in the transmission case 6 and other stored hydraulic oil through a filter, and controls the hydraulic system 8 not shown. The liquid is sent to the valve device via piping 48, and the control valve device is controlled by a control lever 49 shown in FIG. 2 to slide the piston of the hydraulic device 8. Hydraulic pressure for the auxiliary work equipment is extracted from this.

Reference numeral 50 denotes a front loader as an example of the auxiliary working device, and its base 50A is detachably held on an vertical mounting base 51 provided at the front end of the horizontal frame 14, and the loader is attached to a lift cylinder 52, a bucket (not shown), etc. The hydraulic pressure outlet 38 is communicated with the cylinder etc. through piping (not shown) (including a branch pipe), and the operating lever 36
is operated from the seat 12 to operate the loader 50.

Of course, the object from which the auxiliary hydraulic pressure is taken out may be other than the illustrated loader, as well as hydraulic equipment such as blades and belly-mounted working machines. In addition, 53 is the brake pedal, 5
4 indicates a fuel tank, and 55 indicates a tank stay.

It is clear from the detailed explanation above,
In short, the present invention has steps 2 for getting on and off the vehicle on both sides of the vehicle body 7.
3, a working machine hydraulic system 8 is mounted on the rear of the vehicle body 7, and a control device 10 and a hydraulic system 8 are mounted on the rear of the vehicle body 7.
In the traveling work vehicle 1, which is surrounded by a cabin 30, an auxiliary hydraulic control device 33 is provided on one side of the hydraulic device 8, and a hydraulic pressure outlet pipe 37 connected to the control device 33 is extended to the front of the vehicle body 7. , Step 2 for getting on and off the extending end outlet 38 of the hydraulic outlet pipe 37
3. Exposed in front of the cabin 30, and
This oil pressure extraction device for a traveling work vehicle is characterized in that the hydraulic pressure extraction pipe 37 is supported on the vehicle body 7 by a support 40 at an appropriate position, and therefore has the following advantages.

Auxiliary hydraulic control device 3 provided on one side of the hydraulic device 8
3 extends to the front of the vehicle body 7, and its outlet 38 is exposed from the step 23, etc., so that it can be used, for example, from the lift cylinder 5 of the loader 50.
2, there is an advantage that even if there is a cabin 30 etc., the piping can be connected extremely easily and accurately.
In addition, even if the hydraulic pressure outlet pipe 37 is extended forward, it is supported by the support 40 on the vehicle body 7 side, so it does not resonate even when subjected to vibrations, etc., and has the advantage that hydraulic flow resistance can be suppressed. There is.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a tractor employing the present invention, Fig. 2 is an enlarged side view of its main parts, Fig. 3 is a plan view with the same parts omitted, and Fig. 4 is a diagram taken along line A-A in Fig. 3. 5
The figures are sectional views taken along line B-B in FIG. 3. DESCRIPTION OF SYMBOLS 1... Working vehicle, 7... Vehicle body, 8... Hydraulic system for working machine, 10... Control device, 23... Boarding/exiting step, 30... Cabin, 33... Auxiliary hydraulic control device, 37... Hydraulic pressure extraction Pipe, 38...Outlet, 40
...Support.

Claims (1)

[Scope of utility model registration request] The vehicle body 7 is provided with entry/exit steps 23 on both sides, and a working machine hydraulic system 8 is mounted on the rear of the vehicle body 7.
In the traveling work vehicle 1 surrounded by 0, an auxiliary hydraulic pressure control device 33 is provided on one side of the hydraulic device 8, and a hydraulic pressure outlet pipe 37 connected to the control device 33 is extended to the front of the vehicle body 7. The exit/exit step 23 and the cabin 30
A hydraulic pressure extraction device for a traveling work vehicle, characterized in that the hydraulic pressure extraction pipe 37 is exposed further to the front and is supported on the vehicle body 7 by a support 40 at a proper position.