JPH03251106A - Agricultural working machine - Google Patents

Abstract

PURPOSE:To prevent maloperation and accident such as sudden departure during stop by providing most of levers for operating a hydraulic type infinite variable speed device so as to locate on the inside of the outside diameter of a steering handle. CONSTITUTION:An agricultural working machine provided with a hydraulic type infinite variable speed device (HST) for changing the speed of rotating power from an engine by action of a hydraulic pressure and an HST lever 51 rotatable in the fore-and-aft direction so as to locate on the back side of a steering handle 52 and the inside of the outermost part of the handle 52 within the rotation range thereof. Thereby, the steering handle 52 provides an obstacle to nearly eliminate a fear that an operator contacts the lever 51 by mistake. An accident such as sudden departure during stop can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of an operating section in an agricultural machine such as a rice transplanter.

[Prior art] H3TC hydraulic continuously variable transmission ff1) as an auxiliary transmission
An agricultural machine equipped with this is being considered. This HST changes the rotational power input to the input shaft to a desired gear ratio using oil pressure or other functions and outputs it to the output shaft. The advantage is that the traveling speed can be changed continuously up to

[Problem to be solved by the invention] The above H3T is operated with one lever, and the "stop"
"Forward" when you rotate the shi-8 in one direction around the position.
If you turn it in the other direction, it will go backwards, and
The traveling speed changes depending on the amount of rotation of the lever at that time.

In this way, agricultural machines equipped with H3T are easy to operate because they can be operated with just the HST lever, but on the other hand, if the farm machine accidentally comes into contact with the HST lever when it is not running, such as when replenishing seedlings, the machine will There was a danger that it might start running unexpectedly.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration.

That is, the Kaga 4 agricultural machine of the present invention is equipped with a hydraulic continuously variable transmission that changes the speed of rotational power from an engine by the action of hydraulic pressure, and at least most of the levers for operating the hydraulic continuously variable transmission are , is characterized in that it is provided inside the outer diameter of the steering handle.

[Function] Since the operating lever of the H3T (hydraulic continuously variable transmission M) is located on the back side of the steering wheel as seen from the driver and in a position overlapping the steering wheel, the steering wheel becomes an obstacle and prevents the driver from moving. There is almost no risk of accidentally touching the lever, and accidents such as sudden start when stopped + L can be prevented.

[Example] The embodiments shown in the drawings will be described below.

The agricultural machine 1 shown in FIG. 1 has a rice transplanting machine part 4 attached to a link device 3 provided at the rear of a traveling vehicle body 2, and is also equipped with a fertilizing device 5 separately from the machine part. It is used as a riding fertilizer and rice transplanter. Running vehicle body 2
A frame 6 is constructed of parallel vertical vibros a and 6a disposed in the front and rear, members connecting these to each other, and the like in a plan view, and each part is assembled to the frame in an assembly unit.

The engine assembly consists of an engine 10 installed at -F- of an engine stand 10a installed at a position t near the rear of the middle part of a frame 6, and an air cleaner 1 installed above the engine.
1. The engine includes a fuel tank 12 and the like, and a main clutch 15 is provided on an engine output shaft 14 that projects forward from the engine 10.

The main clutch 15 is a multi-disc clutch, and is switched on and off by actuating a shifter 17 by operating a clutch pedal 16. Note that the pivot shaft 18 of the shifter 17 is supported by a bearing 20 provided on a support leg 19 of a mission assembly, which will be described later. Primary side case 1 of main clutch 15
5a is provided with a belt groove, and a hydraulic pump 24 provided below the main clutch 15 is driven by a belt 22 placed over the belt groove.

The mission assembly is H3T (hydraulic continuously variable transmission
position) 3o, mission case 31. A front differential case 32, a rear differential case 33, etc. are assembled together, and left and right front axle cases 36°36 are protruded from the sides of the front differential case 32, and a front wheel support case 37°37 is attached to the end of the left and right front axle cases. freely supported.

Front wheels 38 and 38 are pivotally supported by front wheel shafts 38a, 38a that protrude from the outer surface of the lower end of the front wheel support case.

Engine output is transmitted from the secondary side 15b of the main clutch 15 to the H3T30 via the universal joint 41 and the like. Figure 4 is the hydraulic circuit diagram of H3T, and 4 in the figure
3 is an input shaft, 44 is a hydraulic pump, 45 is a charge pump, 46 is a control valve, 47 is an unload valve, 48 is a hydraulic motor, and 49 is an output shaft. Input shaft 43
The rotational power input to the output shaft 49 is outputted to the output shaft 49 after being changed to a predetermined gear ratio by the action of hydraulic pressure. The rotational direction and gear ratio of the output shaft 49 are controlled by changing the swash plate angle of the hydraulic pump 44, and an H3T lever 51 is provided in the control section 50 for operation thereof.

Fig. 5 is a view of the control unit 50 as seen from the operator side (arrow A), in which 51 is the HST lever, 52 is the steering handle, 53 is the steering post, 54 is the change lever, and 155 is the hydraulic pressure. It is a planting lever. The H3T lever 51 is rotatable in the front-rear direction and is located on the back side of the steering handle 52 and inside the outermost part of the steering handle 52 within its rotation range. Groove 57 where H3T/<-51 is inserted
0 along with a symbol indicating the lever position.
In the illustrated example, when the lever is at the "O" position at the center of the rotation range, it is "stop", when the lever rotates toward the FJ side, it is "forward", and when the lever is rotated toward the rRJ side, it is "reverse".

In addition, FIG. 6 shows the control section 50" of a different agricultural working machine. In this agricultural working machine, the steering handle 50"
A change lever 54' is provided on the left side of 2', a hydraulic planting lever 55' is provided on the right side, and the H3T lever 51'
The base is supported by the right side surface of the steering post 53', and is provided so as to be rotatable back and forth about the base.

When the H5T lever 51' is perpendicular to the direction of travel, the vehicle is at a "stop," when it is rotated forward, it is at a "forward motion," and when it is rotated backward, the vehicle is at a "reverse motion."

This HST lever 51'' is also located on the back side of the steering handle 52' when viewed from the operator, and most of the entire lever excluding the tip of the grip 51a' is located inside the outermost part of the steering handle 52'. It is provided.

When the amount of protrusion of the front part of the vehicle body is small, such as in the illustrated example of the agricultural machine L, the H3T lever 51 (51') is moved from the control section 50 (5
0') is convenient because the operator can operate the H3T lever while standing in front of the vehicle. Also, H shown in FIGS. 5 and 6
Like the 5T lever 51 (51'), the entire operating range or most of it is located on the steering wheel 5 as seen from the driver.
By providing it so as to overlap inside the H9T lever, it is possible to prevent malfunctions caused by the operator accidentally touching the H9T lever.

The output of the H3T30 is transmitted into the transmission case 31, and is appropriately changed in speed by a main transmission, an interstitial transmission, etc., and is output as a front wheel drive output, a rear wheel drive output, and a working part drive output. Front wheel drive output is front differential case 32
Front differential device inside, front axle case 36.
The left and right front axles supported in 36 and the front wheel axles 38a, 38
It can be conveyed to a. The rotational forces of the left and right front wheels 38, 38 have a ratio corresponding to their respective rotational resistances due to the action of the front differential device. The rear wheel drive output is transmitted to the rear differential device inside the rear differential case 33.
Rear differential output shaft 62 protruding rearward from both sides of the rear surface of 3.
．． 62. Note that a handbrake device (not shown) is provided in the middle of transmitting power from the rear differential device to the rear differential output shaft 62°62. Further, the working part drive output is transmitted to the planting club 2 Chiro 4 shown in FIG. 7 via the planting part drive shaft 63. A planting PTO shaft 66 that transmits power to the working machine portion 4 and a fertilizing PTO shaft 67 that transmits power to the fertilizing device 5 protrude from the planting clutch 64 .

The rear case assembly includes rear cases 72 and 72 integrally provided at both left and right ends of a horizontal rod 71 that is rollably supported by the rear end of the frame 6, and a rear wheel shaft 73a that protrudes outward from the rear case. 73a and rear wheel 73.73
is pivoted. Rear case 72.72
Power is transmitted to the rear wheel drive shaft 75.75 connected to the rear differential output shaft 62.62.

The steering assembly includes the steering handle 52, the steering shaft 81. Consists of gear case 82, pitman arm 83, etc.
A tie rod 86.8 in which both left and right ends of the tie rod arm 85.85 of the front wheel support case cross each other.
Connected by 6. The rotational force applied to the steering handle 80 is reversed and decelerated by a gear mechanism in the gear case 82 and transmitted to the pitman arm 83. This movement of the pitman arm 83 is transmitted to the front wheel support case 37.37 via the tie rod 2 86.
8 is turned around.

A body 88 is provided on these chassis, and a pilot's seat 89 is installed on the body 88 facing the pilot section 50.

The link device 3 includes a support frame 9 erected at the rear end of the frame.
0, an upper link 91 and a lower link 92 are rotatably supported, and a connecting frame 94 is attached to the rear ends of these upper and lower links. The work implement portion 4 is mounted on this connection frame 94 in a rolling manner. Further, a hydraulic cylinder 85 for driving a link device is pivotally mounted below the engine 10, and a lower end portion of a swing arm 96 extending vertically from the base of the upper link 91 is connected to the rod of the hydraulic cylinder. When the hydraulic cylinder 95 is expanded or contracted, the connecting frame 94 is moved up and down while being maintained in a substantially constant position, and the working machine portion 4 attached thereto is raised and lowered.

The working machine part 4 includes a transmission case 100 that receives power from the planting PTO shaft 66, and a seedling platform 101 that is inclined and provided in front of the transmission case with the front side facing upward.
2 sets of planting rods per row 102. The seedling loading stand 101 reciprocates left and right to supply the seedlings on the stand one by one to a predetermined seedling outlet, while the planting rod 102 moves down the L while tracing a predetermined trajectory. The seedlings supplied to the seedling outlet are held by the planting claws 102a provided at the tip of the planting rod and planted in the field. Note that when the seedling platform 101 reaches the end of the left and right travel and finishes supplying one horizontal row of seedlings to the seedling outlet, the belt-type seedling feeding device g
A center float 105 and a pair of left and right side floats 106, 106 are attached to the lower side of the working machine part 4, which is operated by l103 to move the seedlings downward by one row.

The fertilizer application M5 includes a fertilizer tank 111 for storing fertilizer,
A feeder l12 that is driven via the fertilization PTO shaft 67 and feeds out the fertilizer in the fertilizer tank downward is provided above the support frame 90, and the fertilizer fed from the feeder 122 is guided downward through the fertilizer pipe 113. , is supplied to a fertilization groove formed in the field by a groove creator 114.

Further, a blower 116 is provided in the engine compartment 115,
By sending the hot air in the engine room sucked by the blower into the fertilization pipe 113, the flow of fertilizer within the pipe is improved and the fertilizer is prevented from becoming individual within the pipe.

[Effects of the Invention] As explained above, the agricultural machine according to the present invention is equipped with an H5T (hydraulic continuously variable transmission) as an auxiliary transmission, and most of the H5T lever for operating the H5T is located on the steering handle. Since it is located inside the outer diameter, malfunction of the H3T lever due to driver's carelessness is prevented, and accidents such as sudden start while stopped occur.

[Brief explanation of drawings]

FIG. 1 is a side view of a riding fertilizing rice transplanter which is an example of the present invention;
Figures 2 and 3 are side views and plan views of the main parts;
The figure is a hydraulic circuit diagram of H3T, Figure 5 is a view from arrow A in Figure 1, Figure 6 is an explanatory diagram of the control section of a different agricultural machine, and Figure 7 is an illustration of the control section of a different agricultural machine.
Figures (a) and (b) are a side view and a plan view of the planting clutch. ■... Riding fertilizer application rice transplanter (agricultural work machine), 2... Traveling vehicle body, 3... Link device, 4... Working machine part, 5...
・Fertilization system δ, 6...Frame, 10...Engine,
30...H3T (hydraulic continuously variable transmission), 31...
Mission case, 51.51'...H3T lever,
52, 52'... Steering handle. 1x4 figure 3゜

Claims (1)

[Claims] (1) Equipped with a hydraulic continuously variable transmission that changes the speed of rotational power from the engine by the action of hydraulic pressure, and at least a majority of the levers that operate the hydraulic continuously variable transmission are located inside the outer diameter of the steering handle. An agricultural machine characterized by being provided with.