JP2023068533A - Coupling device for work vehicle to external hydraulic machine - Google Patents

Abstract

To provide a coupling device for a work vehicle to an external hydraulic machine, shortening and simplifying a pipe from a hydraulic machine inside the work vehicle to the external hydraulic machine and facilitating pipe connection of the work vehicle to the hydraulic machine.SOLUTION: A coupling device for a work vehicle 1 including a work machine 50 on a rear side of a traveling car body 2, to an external hydraulic machine, the coupling device for the work vehicle to the external hydraulic machine comprises a pair of left/right external hydraulic pressure takeout plates 26 including external hydraulic pressure takeout connection plugs 30 and 31 for connecting an external hydraulic hose, provided on a rear frame 25 between left/right rear fenders 11 and 11 of the traveling car body 2.SELECTED DRAWING: Figure 4

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting a work vehicle to an external hydraulic device, which supplies hydraulic pressure of a hydraulic drive device provided in the work vehicle to hydraulic devices of an external hydraulic work machine to perform work.

The working machine hydraulic supply device of the working vehicle is provided on the side of the machine body so that it can be easily operated by a worker standing on the side of the working vehicle.

For example, as described in Patent Document 1, there is a configuration in which a hydraulic operating device is provided on the fender of the rear wheel.

Japanese Unexamined Patent Application Publication No. 2006-191811

However, since the hydraulic pump of the work vehicle is installed inside the transmission case, the hydraulic piping from this hydraulic pump to the hydraulic operation device of the fender is long exposed from the bottom of the fuselage to the top of the fender, so it is possible to cover the piping. It had to be covered and looked ugly.

An object of the present invention is to provide a device for connecting a working vehicle to an external hydraulic equipment, in which the piping from the hydraulic equipment inside the machine body to the external hydraulic connection portion can be shortened and simplified, and the pipe can be easily connected to the hydraulic equipment of the working vehicle. Make it an issue.

The above problems of the present invention are solved by the following technical means.

According to the first aspect of the invention, there is provided a connecting device for connecting a working vehicle 1 to an external hydraulic equipment, in which a working machine 50 is attached to the rear part of the traveling vehicle body 2, wherein an external hydraulic hose is attached to the rear frame 25 between the left and right rear fenders 11, 11 of the traveling vehicle body 2. A connecting device for a work vehicle to an external hydraulic device is characterized in that a pair of left and right external hydraulic pressure take-out plates 26 provided with external hydraulic take-out connection plugs 30 and 31 for connecting the work vehicle is provided.

According to the second aspect of the invention, an accessory attachment stay 34 for attaching a low-speed vehicle mark 36 and a license plate 35 to the rear frame 25 is attached to the rear frame 25 together with the external hydraulic pressure extraction plate 26. to the external hydraulic equipment of the working vehicle.

The invention according to claim 3 is characterized in that an external power source mounting portion 34A is provided on the accessory mounting stay 34 laterally of the license plate 35. device.

In the first aspect of the invention, the external hydraulic pressure extraction plate 26 is provided on the rear frame 25 between the left and right rear fenders 11, 11, so that the hydraulic pipe routed from the transmission case at the lower part of the fuselage is exposed to the outside of the traveling vehicle body 2. There is no problem and it does not look bad. Also, the pair of left and right external hydraulic pressure take-out connecting plugs 30 and 31 of the external hydraulic pressure take-out plate 26 can be easily approached from either the left or right side of the traveling vehicle body 2, and the external hydraulic pipes can be easily attached.

According to the invention of claim 2, in addition to the effects of claim 1, the license plate 35 and the low-speed vehicle mark 36 required for the work vehicle 1 can be easily attached to the rear part of the traveling vehicle body 2 at positions that are easy to see from behind.

According to the invention of claim 3, in addition to the effect of claim 2, the power cord can be easily connected to the plug attached to the external power supply attachment portion 34A from the side of the traveling vehicle body 2, and the power supply can be easily removed.

1 is a schematic left side view of a work vehicle according to an embodiment of the present invention; FIG. 1 is a schematic plan view of a working vehicle according to an embodiment of the present invention; FIG. 1 is a schematic rear view of a working vehicle according to an embodiment of the present invention; FIG. 1 is an enlarged rear perspective view of a work vehicle according to an embodiment of the present invention; FIG. 1 is a perspective view of an accessory attachment stay for a work vehicle according to an embodiment of the present invention; FIG. 1 is a rear view of a working vehicle according to an embodiment of the present invention; FIG.

Hereinafter, embodiments of the work vehicle disclosed in the present application will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by embodiment shown below.

FIG. 1 is a schematic left side view of the work vehicle 1. FIG. FIG. 2 is a schematic plan view of the work vehicle 1. FIG. FIG. 3 is a schematic rear view of the work vehicle 1. FIG. In addition, below, the tractor (agricultural tractor) used when working in a field is demonstrated as an example as the working vehicle 1. FIG.

Further, in the following description, the front-rear direction is the traveling direction of the work vehicle, that is, the tractor 1 when traveling straight. The traveling direction of the tractor 1 is the direction from the later-described cockpit 7 to the steering handle 6 when the tractor 1 travels straight (see FIGS. 1 and 2).

Moreover, the left-right direction is a direction horizontally perpendicular to the front-rear direction. Here left and right are defined with respect to the "front" side. That is, when the operator sits in the cockpit 7 and faces forward, the left hand side is "left" and the right hand side is "right" (see FIGS. 2 and 3). Furthermore, the vertical direction is a direction perpendicular to the front-rear direction and the left-right direction (see FIGS. 1 and 3). The front-back direction, the left-right direction, and the up-down direction are three-dimensionally orthogonal to each other.

As shown in FIGS. 1, 2 and 3, the tractor 1 has front wheels 3, 3 and rear wheels 4, 4 at the front and rear of a traveling vehicle body 2, respectively. Rotational power of the engine E is appropriately decelerated by a transmission in a transmission case 20 (see FIG. 3) and transmitted to the front wheels 3, 3 and the rear wheels 4, 4. Although not shown, a hydraulic pump that generates hydraulic pressure is provided in the transmission case 20 to supply the hydraulic pressure to the lifting cylinders for lifting and lowering the working machine 50 and to generate pressurized oil for operating the external working machine.

A steering handle 6 supported by a handle post 5 is provided at the central portion of the traveling vehicle body 2 , and an operator's seat 7 is provided behind the steering handle 6 . Although not shown, various operation levers such as a throttle lever for adjusting the rotation speed of the engine E are provided around the steering handle 6 .

A clutch pedal 9 is provided on the left side of the step floor 8 at the center of the traveling vehicle body 2 with the handle post 5 interposed therebetween, and left and right brake pedals 10L and 10R for braking the left and right rear wheels 4 and 4, respectively, are provided on the right side. is provided.

As shown in FIG. 2, the traveling vehicle body 2 includes left and right rear fenders 11, 11 that cover the left and right rear wheels 4, 4 from the front and above on both the left and right sides of the driver's seat 7. As shown in FIG. A main gearshift lever 12 is provided on the upper surface (upper surface) of the left rear fender 11, and behind the main gearshift lever 12 is a sub gear that selects one of the low speed, medium speed, high speed and neutral positions. A shift lever 13 is provided.

Further, on the upper surface of the right rear fender 11, for example, a plowing depth lever 14 for setting the plowing depth of the work machine (for example, a rotary tiller) 50, and an elevating arm 101 are operated to set the height of the work machine 50. A position lever 15 or the like for

Left and right rear frames 16, 16 (see FIG. 3) are provided at the rear portion of the traveling vehicle body 2 to support the left and right rear fenders 11, 11 from below, respectively. Furthermore, an arch-shaped rope frame 17 supported by left and right rear frames 16 , 16 is provided behind the operator's seat 7 in the rear part of the traveling vehicle body 2 .

The work machine 50 is supported by a hitch (for example, a 2P hitch) attached to the rear frame 16 and a lift arm 101 (including a rear lift rod) so as to be liftable, and is connected to the rear part of the traveling vehicle body 2 . there is As shown in FIG. 3, the work machine 50 takes out rotational power transmitted from the engine E from a PTO (Powertake-off) shaft 21 provided on the rear surface of the transmission case 20, and rotates, for example, a tillage tine. To do cultivating work, etc.

The elevating arm 101 is connected to an elevating link mechanism in an elevating cylinder case provided below the cockpit 7 . In addition to the lifting link mechanism, the lifting cylinder case houses a lifting cylinder for driving the lifting arm.

In addition, for example, by limiting the rotation speed of the lifting link mechanism 120 interlocked with the rotation of the lifting arm 101 by a damper, the lowering speed of the working machine 50 can be slowed down. The elevating arm, elevating cylinder case, elevating cylinder, elevating link mechanism, and damper described above constitute a so-called mechadecera that adjusts the lowering speed of the working machine 50 .

Further, the working machine 50 is connected to the traveling vehicle body 2 so as to be able to roll around the PTO shaft 21 and is arranged behind the traveling vehicle body 2 . The working vehicle (tractor 1) according to the present embodiment has three modes for controlling the rolling attitude of the working machine 50 with respect to the traveling vehicle body 2 according to the application.

FIG. 4 is a perspective view of the work vehicle 1 as seen from the rear. External hydraulic pressure extraction plates 26, 26 are bolted 27 to the left and right of a rear frame 25 that connects the traveling vehicle body 2 to the left and right between the left and right rear fenders 11, 11, respectively. installed with

The external hydraulic pressure extraction plate 26 is provided with relay valves 32, 33 for hydraulic hoses 28, 29 connected to the hydraulic pump of the transmission case 20, and connection plugs 30, 31 for connecting the external hydraulic hoses facing rearward.

An external hydraulic hose connected to a hydraulic cylinder or the like of an external work machine is connected to the connection plugs 30 and 31 to flow pressure oil from a hydraulic pump on the side of the work vehicle 1 to perform hydraulic work.

With this configuration, since the hydraulic hoses 28 and 29 are laid on the inner bottom portion of the work vehicle 1, they are not visible from the outside, and there is no need to cover them with a new cover.

The working vehicle stands on the side of the rear fender 11 to connect the external hydraulic hoses to the relay valves 32 and 33 , and the external working machine is hydraulically operated by an operation lever provided near the operator's seat 7 of the working vehicle 1 .

FIG. 5 shows an accessory mounting stay 34 provided with an external power supply mounting portion 34A, a license plate mounting portion 34B for a license plate 35, and a low speed vehicle mark mounting portion 34C for a low speed vehicle mark 36. are attached together with bolts 27. Note that FIG. 6 is a rear view of the work vehicle according to the embodiment of the present invention.

1 working vehicle 2 traveling vehicle body 11 rear fender 25 rear frame 26 external hydraulic pressure extraction plate 30 connection plug 31 connection plug 34 accessory mounting stay 34A external power supply mounting portion 35 license plate 36 low speed vehicle mark

Claims (3)

In a device for connecting a working vehicle (1) to an external hydraulic device in which a working machine (50) is attached to the rear part of a traveling vehicle body (2), a rear frame (25) between left and right rear fenders (11, 11) of the traveling vehicle body (2) ) is provided with a pair of left and right external hydraulic pressure extraction plates (26) provided with external hydraulic pressure extraction connection plugs (30, 31) for connecting external hydraulic hoses to external hydraulic equipment. . An accessory mounting stay (34) for mounting a low-speed vehicle mark (36) and a license plate (35) on the rear frame (25) is mounted on the rear frame (25) together with an external hydraulic pressure extraction plate (26). 2. The device for connecting a work vehicle to external hydraulic equipment according to claim 1. 3. A device for connecting a work vehicle to an external hydraulic device according to claim 2, wherein an external power supply mounting portion (34A) is provided on the accessory mounting stay (34) laterally of the license plate (35). .

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