JPH02120132A - Multipurpose farm working vehicle - Google Patents

Abstract

PURPOSE:To make respective farm working machines drivable at the same time as well as to dispense with any detaching operation at each application of several farm working machines by setting up a change gear almost in the central position in the longitudinal direction of a machine body, and making each farm working machine attachable to front, web and rear parts of the machine body. CONSTITUTION:A change gear C is set up in an almost central part in the longitudinal direction of a body frame 5, and an engine E and a radiator 56 are set up in the rear side in order. Then, a frame cover 4 is covered on top of the body frame 5 so as to cover those parts of change gear C, engine E and radiator 56. The change gear C is constituted so as to project a power take-off shaft 6 and an all-wheel drive shaft 7 in front and in the rear of the change gear, and a fork-lift device F is connected to a front power take-off shaft part via a joint shaft or the like, and then a rotary plower R is connected to a rear power take-off shaft part via a joint shaft 73 or the like. A mower M as a web farm working machine is driven by power of the rear farm working machine part via a belt transmission means or the like.

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention enables a work machine to be attached to the front, abdomen, and rear of the lawn, making it possible to carry out a variety of light management tasks such as mowing, transporting, and intertilling. It provides a multi-purpose work vehicle.

(B) Prior Art Tractors have been known in the past to which work implements can be attached to the front and rear parts. There are also known tractors in which a working machine such as a mid-mount mower can be attached to the abdomen.

However, there has never been a single tractor that allows multiple work implements to be attached to the front, abdomen, and rear of a single tractor, and that allows power to be transmitted to these multiple times.

(c) Problems to be Solved by the Invention The present invention enables a front work machine, an abdominal work machine, and a rear work machine to be installed redundantly on one multi-purpose work vehicle, and each work machine It is equipped with a 3-path PTO transmission system that can drive both at the same time.

This eliminates the need to attach and detach other work machines each time each work machine is used, and eliminates the need to replace the power transmission system.

In addition, since the safety frame 3 is placed at a position covering the seat S from the front end of the aircraft to the rear position of the seat S,
When mowing the lawn at a golf course, the safety frame 3
A net can be placed over the top of the machine to protect the operator from being hit by a ball, and it is also designed to be safe even in the event of a fall or if a load falls from the forklift device F at the front.

In addition, by providing a load platform H above the frame cover 4 at the rear of the seat S, the load can be carried without obstructing the operator's view, and the load can be balanced with the load carried by the forklift device F. Since the same type of baggage can be placed on the baggage loading table H, the area handling capacity can be improved.

(d) Means for Solving the Problems The objects of the present invention are as described above. Next, the structure for achieving the objects will be explained.

The engine E and the transmission C are arranged approximately at the center of the machine in the longitudinal direction, and the machine is configured so that work equipment can be attached to the front, abdomen, and rear of the machine, thereby providing power to each of the work machines at the front, abdomen, and rear. This makes it possible to transmit information.

Furthermore, a safety frame 3 is fixedly installed to protect the area from the front end of the aircraft body to the seat S portion.

In addition, the engine E and the transmission C are arranged approximately at the center in the longitudinal direction of the aircraft, and a luggage rack H is provided behind the seat S on the frame cover 4 that covers the engine E and the transmission C. It was established.

(E) Embodiment The object and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

First, with reference to FIGS. 1 and 2, the overall configuration of the multi-purpose work vehicle of the present invention will be explained.

The fuselage frame 5 supports the entire fuselage, and has a rectangular frame structure.

A transmission C is fixed to the body frame 5, and an engine E is fixed to the rear surface of the transmission C. The radiator 56 of the engine E is arranged at the rear.

Further, a frame cover 4 that covers the transmission C, engine E, and radiator 56, further covers the front steering case 55, and also serves as a step is placed over the upper surface of the fuselage frame 5. The frame cover 4 is a cover made of FRP resin or the like.

A seat S is arranged above the transmission C on the upper surface of the frame cover 4, and the upper surface of the engine E and radiator 56 is configured with a cargo 781 vehicle H, and the cargo platform H is surrounded by a cargo platform. It is surrounded by a frame IO.

Further, a front wheel drive shaft 57 and a rear wheel drive shaft 58 protrude from the front and rear of the transmission C, and these shafts drive the front and rear differential axles, thereby driving the front wheels 8, 8 and the rear wheels 9, 9. . Common parts can be used for the front and rear differential axle devices.

The safety frame 3 has a frame structure as disclosed in FIG. 11, and its front end is fixed to the front end of the fuselage frame 5, and its rear end extends laterally from the fuselage frame 5 as shown in FIG. Protruding safety frame support frame 47.4
It is placed and fixed on top of 7.

This multi-purpose work vehicle is a low-floor, four-wheel drive, four-wheel steering vehicle, and the work equipment can be mounted in three positions: front, abdomen, and rear.

In the embodiment shown in FIG. 1, a forklift device F is installed as a front working device, a mid-mount mower M is installed as an abdominal working device, and a rotary tiller R is installed as a rear working device.

The forklift equipment WF changes the inclination angle back and forth by the tilting cylinder 11, and the wire 50 is pulled as the lift arm 38 pivotally supported by the lift hydraulic case 2 rotates.
By extending through a pulley, the lift platform of the forklift device F can be moved up and down. In the case of a work machine that requires PTO rotation other than the forklift device F, the PTO take-out shaft 6a of the transmission C, which will be described later.
This also makes it possible to drive the front working machine via the joint shaft.

Further, the rotary tiller R as a rear working machine is supported by a three-point link by a top link 59 and lower links 60 and 60, and can be raised and lowered by a lift arm 38. It is also driven via a joint shaft from a rear PTO shaft 41 connected to the rear PTO take-off shaft 6b of the transmission C via a joint shaft.

In addition, the Midmount Mower M, which is used as an abdominal work machine, is the first
As shown in the figure, a guide support rod 54 is pivotally supported at the front end, and the rear part of the mid-mount mower M is pulled by a wire 50 that is suspended by an elevating support rod 53 and linked to the lift arm 38. , a mid-mount mower M is configured to be lifted up by a lifting support rod 53 and a guide support rod 54.

In addition, the drive of the mid-mount mower M is carried out using a boot IJ-4 installed at the rear end of the mid-PTO intermediate shaft 42 of the lift hydraulic case 2.
A belt is interposed between the pulley 45 and the mid-PTO shaft 43 to drive the mid-PTO shaft 43, and the front end of the mid-PTO shaft 43 is connected to the bevel gear box 52 of the mid-mount mower M. A joint shaft 51 is interposed between the two and driven.

The mid-PTO shaft 43 has a bearing tube 62 fixed to a support plate 61 hanging from the lift hydraulic case 2 and the body frame 5, and is supported by the bearing tube 62.

Next, the configuration of the transmission C will be explained with reference to FIGS. 3 and 4.

The front part of the transmission case 1 is closed by a lid body 11, and the rear opening is closed by attaching an engine E. A main clutch device 27 is interposed between the flywheel 28 fixed to the crankshaft 75 of the engine E disposed at the rear of the transmission C and the clutch shaft 12.
The gear 15 at the front end is the fixed gear 1 on the counter shaft 14.
It meshes with 6.

The fixed gear 16 and the fixed gear 19 are configured as two fixed gears, and are loosely fitted onto the counter shaft 14.

By selectively meshing one of the two fixed gears 16 and 19 with one of the sliding gears 17 and 18 on the PTO shaft 6, the PTO can be shifted high or low.

In addition, another fixed gear 63 is mounted on the counter shaft 14.
is fixedly installed, and the carved gear 15 on the front end of the clutch shaft 12, the fixed gear 19 on the counter shaft 14, and the fixed gear 63 are connected to the spline 68 on the speed change shaft 13. By selectively meshing with the sliding gears 20 and 21, it is possible to shift the sub-shift between high, medium and low.

In addition, another set of sliding gears 22 and 23 on the transmission shaft 13 selectively meshes with either of the loosely fitted double gears 24 and 25 on the counter shaft 14, thereby changing the forward 1st and 2nd speeds of the main transmission. It is possible to change the speed.

Also, the sliding reverse gear 30 on the reverse shaft 31 in FIG. Please configure it so that you can do it.

24 of the two loosely fitted gears 24 and 25 mesh with the fixed gear 26 on the front and rear wheel drive shafts 7 to drive the front and rear wheel drive shafts 7.

As shown in FIG. 3, the PTO shaft 6 and the front and rear wheel drive shafts 7
has protrusions at the front and rear, allowing PTO drive and traveling drive at either the front or rear. PTO axis 6
The forward protruding part is the front PTO extraction shaft 6a,
The rearward protrusion is the rear PTO extraction shaft 6b.

Further, the forward projecting portion of the front and rear wheel drive shafts 7 is a front and rear wheel drive shaft 7a, and the rearward projecting portion is a rear front and rear wheel drive shaft 7b.

The PTO shaft 6 and the front and rear wheel drive shafts 7 are arranged at the bottom of the transmission case 1, but as shown in FIG. The diameter of the flywheel 28 is increased (configured) to increase the vertical stroke of the mid-mount mower M.

As shown in FIG. 4, the main shift lever 29 controls the shifter 32 of the sliding reverse gear 30 and the dual sliding gear 22.
The shifter 33 is configured to select and operate one of the 23 shifters 33, and a shifter 36 that slides the dual sliding gears 20 and 21 is operated by an auxiliary transmission arm 34.

The auxiliary gear shift and the main gear shift enable six forward gears and three reverse gears.

Further, the shifter 37 is moved back and forth by the PTO speed change lever 35, and the double sliding gears 17 and 18 are moved back and forth, thereby making it possible to change the PTO speed up and down.

Next, the configuration of the differential axle device will be explained with reference to FIGS. 5 and 6.

The differential axle device enables the use of a common device for the front wheels 8, 8 and the clutch drive device, and the front wheel drive shaft 57 is connected to a portion of the front front and rear wheel drive shaft 7a where the front and rear wheel drive shaft 7 projects forward. , is connected to the differential pinion shaft 69 of the front differential axle installation WD. Also, the rear front and rear wheel drive shaft 7b is a rearward protrusion of the front and rear wheel drive shaft 7.
A rear wheel drive shaft 58 is connected to the pinion shaft 69 of the rear axle differential axle device.

Inside the differential axle device, a pinion shaft 69, a differential gear device 65, a differential lock device 66, and a steering brake device 67 are arranged. A rotating bevel gear case 64 is arranged.

Since the differential pinion shaft 69 is pivoted to the fuselage frame 5 with the center pin position, the left and right ends of the differential axle device itself can be swung up and down.

However, it is possible to switch the swing, steering, and drive, either all or individually.

Next, the structure of the lift hydraulic case 2 will be explained with reference to FIGS. 7 and 8.

A hydraulic cylinder 49 is arranged outside the lift hydraulic case 2, and the hydraulic cylinder 49 is connected to the lift arm 3.
It is pivotally supported by a pivot pin 39 at the lower end of 8. Therefore, the lift arm 38 moves up and down as the hydraulic cylinder 49 expands and contracts, and a wire 50 for raising and lowering the mid-mount mower M is also connected to the lower end of the lift arm 38.

Further, an elevation control valve V is arranged inside the lift hydraulic case 2, and the lift arm 38 is connected to the lift arm 38 via a position control link mechanism 70 connected to one end of the lift arm
It is configured to work in conjunction with 8.

Hydraulic oil for lifting and lowering the hydraulic cylinder 49 is used by sucking lubricating oil inside the lift hydraulic case 2 from a strainer 72, introducing it through a pipe 71 to a hydraulic pump on the side of the engine E, and converting it into pressure oil before lifting and lowering it. The control valve has been returned to ■.

The pressure oil discharged from the lift control valve (2) is flowing down into the lift hydraulic case 2 again.

In addition, the lift hydraulic case 2 supports two shafts, a rear PTO shaft 41 and a mid PTO intermediate shaft 42, and the rear PTO shaft 41 is a PTO shaft for a rear-mounted work machine such as a rotary tiller R. The mid-PTO intermediate shaft 42 is a shaft that transmits power to a mid-PTO shaft 43 supported in a lower bearing sleeve 62 via pulleys 45 and 46 and a belt.

The rear PTO shaft 41 is a PTO shaft that protrudes rearward from the transmission C.
It is connected to the TOTeO2 end via a joint shaft 73 as shown in FIG. 9, and the rotation decelerated from the rotation of the engine E is transmitted.

On the other hand, the mid PTO intermediate shaft 42 transmits power for a high-speed rotating work machine such as the mid mount mower M, and the rotation of the engine E before entering the transmission C is transmitted to the crankshaft. Take it out from 75 and attach the joint shaft 74.
It is configured so that it can be transmitted via.

Therefore, although it is also supported by the lift hydraulic case 2, the rotation of the rear PTO shaft 41 is slow, and the rotation of the rear PTO shaft 41 is slow.
The rotation of the TO intermediate shaft 42 is as fast as the rotation of the engine E.

FIG. 10 is a diagram showing a front and rear wheel steering device.

The steering handle 76 rotates a bevel gear within the steering gear case 55 and drives a sector shaft 81 that protrudes left and right from the steering gear case 55. Pitman arms 77 are provided on the left and right sides of the sector axis 81.
・78 is fixedly installed and can be rotated back and forth.

The pitman arm 77 rotates the knuckle arms 82 of the front wheels 8 through a drag rod 80, and the pitman arm 78 rotates the knuckle arms 82 of the front wheels 8 through a drag rod 79.
The knuckle arm 83 of No. 9 is rotated back and forth.

If you wish to steer only the front wheels, remove the joint between the focusman arm 78 and drag rod 79 and fix the drag rod 79 to the aircraft frame 5. It is possible to switch to a positive state. Conversely, by removing the drag rod 80 from the pitman arm 77, it is also possible to configure the vehicle so that only the rear wheels are steered and the front wheels are not steered.

FIG. 11 shows the shape of the safety frame 3.

(f) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

As claimed in claim (1), the engine E and the transmission C are disposed at approximately the central position in the longitudinal direction of the aircraft, and the
It is configured so that work equipment can be attached to the abdomen and rear, and the front, abdomen,
Since power can be transmitted to each rear work machine, the front work machine, abdominal work machine, and rear work machine can be installed redundantly on a multi-purpose work vehicle, and each work machine can be operated separately. Since it is possible to drive both machines at the same time,
There is no need to attach or detach other working machines each time each working machine is used, and there is no need to replace the power transmission system.

As claimed in claim (2), the safety frame 3 is fixedly installed to protect the area from the front end of the machine body to the seat S portion, so when mowing the lawn at a golf course, a net is placed over the safety frame 3 to prevent hitting balls. The operator can be protected and the multi-purpose work vehicle can be made safe even in the event of overturning or if cargo falls from the forklift device F at the front.

As claimed in claim (3), the engine E and the transmission C are disposed at approximately the center position in the longitudinal direction of the aircraft, and the engine E and the transmission C are placed on the frame cover 4 that covers the rear of the seat S. Since a load platform H is provided at the front, the load can be transported without obstructing the operator's view, and similar loads can be placed on the load platform H to maintain balance with the load being carried by the forklift device F. This made it possible to improve transportation capacity.

[Brief explanation of drawings]

FIG. 1 is a side view of the multi-purpose work vehicle of the present invention, FIG. 2 is a plan view, FIG. 3 is a side sectional view of the transmission WC, FIG. 4 is a partial front sectional view of the transmission ZC, and FIG. Figure 5 is a front sectional view of the differential axle device, Figure 6 is a side view, Figure 7 is a front view of the lift hydraulic case 2, Figure 8 is a side sectional view, and Figure 9 is a mid-mount. FIG. 10 is a plan view showing the four-wheel steering mechanism, and FIG. 11 is a perspective view of the safety frame 3. C... F... R... M... H... S... 3... 4... ・Transmission device, forklift device, rotary tiller device, midmount mower, load platform, seat, safety frame, frame Cover - Applicant Yanmar Diesel Co., Ltd. Agent Patent Attorney Hisashi Yano Part

Claims (3)

[Claims] (1) The engine E and the transmission C are located approximately at the center of the machine in the longitudinal direction, and the work equipment is configured to be attachable to the front, abdomen, and rear of the machine. A multi-purpose work vehicle characterized by being able to transmit power to a work machine. (2) A multi-purpose work vehicle according to claim (1), characterized in that a safety frame 3 is fixedly installed to protect the area from the front end of the machine body to the seat S portion. (3) The engine E and the transmission C are arranged approximately at the center in the longitudinal direction of the aircraft, and a luggage rack is installed behind the seat S on the frame cover 4 that covers the engine E and the transmission C. A multi-purpose work vehicle characterized by the H.