JPH02120130A - Farm working machinery - Google Patents

Abstract

PURPOSE:To aim at the simplification of transmission structure by setting up a main transmission case in front of a car body and an engine in an intermediate part respectively, and connecting the front of a countershaft, being transmittibly linked up with an output shaft of the engine, to the main transmission case and the rear to a working unit, respectively. CONSTITUTION:In a paddy farm working machine 1, attaching a rice-planter 3 to the rear of a riding travel vehicle 2, a front end of a main frame 6 extending in the rear is connected to the back of a main transmission case 5 set up in front of a bar body, and a rear-wheel transmission case 7 is solidly installed in a rear end of this main frame 6. An engine 20 is set up on an underframe 21 tightly attached to an intermediate part of the main frame 6, and its output shaft 23 is projected frontwards. Then, this output shaft 23 and each countershaft 24 installed in front and in the rear of a right side of the engine 20 both are made into belt transmission, while a front end of the countershaft 24 is inserted into the main transmission case 5, and the rear end is inserted into a planting clutch case 25 adjacent to the engine 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an agricultural machine such as a riding rice transplanter, and particularly to the configuration of its power transmission system.

[Prior Art] For example, Japanese Patent Application No. 6L-034105 (Japanese Unexamined Patent Publication No. 6L-0
42334), ``In a rice field farm machine that uses a passenger towing vehicle to tow the working equipment, an engine is installed in the middle or rear of the body of the towing vehicle, and a transmission case is installed in the front end of the body, and the output of the engine is increased. A system has been proposed in which rotational power is transmitted from the shaft to the transmission case via a transmission shaft passing along the side of the engine, and from the transmission case to the traveling wheels and working equipment.

[Problems to be Solved by the Invention] The embodiment described in the above publication is a method for transmitting rotational power of the engine through the side of the engine when transmitting power to a working device installed at the rear of the vehicle body. It is once transmitted to a transmission case installed at the front end of the vehicle body via a shaft, and then transmitted again from the transmission case to the working device via a planting output shaft and a secondary output shaft. For this reason, the shafts for transmitting power to the working device overlap in the front and back direction.

It was structurally wasteful. Furthermore, since the working transmission and the traveling transmission are housed in the same transmission case, the structure inside the transmission case is complicated, which poses problems in terms of maintenance.

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

That is, the rice field farming machine according to the present invention is a four-wheel drive farm machine in which the working device is attached to the rear of the passenger vehicle, and the main transmission case having the traveling system transmission is mounted on the front part of the body of the vehicle. A rear wheel transmission case having a rear wheel transmission mechanism is provided at the rear, and an engine is disposed at the front and rear intermediate portions of both cases, and the output shaft of the engine is provided to protrude forward or rearward, and parallel to this. A counter shaft is provided that passes along the side of the engine, and the output shaft and the counter shaft are transmission connected to each other, and the front part of the counter shaft, which is in front of this transmission connection part, transmits power to the main transmission case, and the transmission connection is made. It is characterized in that power is transmitted to the working device at the rear of the counter shaft, which is rearward of the counter shaft.

[Function] The rotational power of the engine is directly transmitted to the work equipment via the rear part of the countershaft without passing through the main transmission case installed at the front of the vehicle body, simplifying the transmission configuration and reducing the number of parts. The number is reduced and assembly is simplified.

Furthermore, since one working system clutch can be provided, for example, in the middle of the rear part of the counter shaft, the structure inside the main transmission case is simplified and maintenance is easy.

[Embodiment] FIGS. 1 to 10 show an embodiment of the agricultural working machine according to the present invention. The shown example of the agricultural working machine 1 for paddy fields has a rice transplanting device attached to the rear of a passenger vehicle 2 as a working device. 3 is installed, making the whole machine a riding-type rice transplanter. Also,
As a working device, a fertilizing device 4 is also provided in addition to the rice transplanting device 3.

In addition to this, a seeding device, a chemical spraying device, etc. can be used.

In the running vehicle 2, the front end of a main frame 6 extending rearward is fixedly connected to the back of a main transmission case 5 disposed at the front of the vehicle body, and a rear wheel transmission case is attached to the rear end of the main frame. 7 are integrally provided. A front wheel support case 11.11, which has a front wheel 10.10 attached to its lower end, is provided at the end of the front axle case 9, which projects laterally from both sides of the main transmission case 5, so as to be able to change direction.

In addition, gear cases 1 are provided at both left and right ends of the rear wheel transmission case 7.
3.13 are provided, and rear wheels 14.14 are respectively pivotally supported at their lower ends.

The engine 20 is installed on an underframe 21 fixed to an intermediate portion of the main frame 7, and has an output shaft 23 protruding forward. A belt is transmitted from this output shaft 23 to a counter shaft 24 provided front and rear on the right side of the engine 20. The front end of the counter shaft 24 is inserted into the main transmission case 5, and the rear end is inserted into a planted clutch case 25 arranged next to the engine 20. A secondary shaft 24' of a counter shaft projects from the rear of the planted clutch case 25.

Transmission device 3 from engine output shaft 23 to counter shaft 24
0, the pulley 31 attached to both shafts,
Two wooden belts 33 and 34 are stretched around 32, and tension pulleys 37 and 3 are operated by a clutch lever 36.
Power is transmitted by tensioning the belt 33 or 34 at step 7. Since the pulley 32 is a multi-stage pulley, low-speed transmission is performed when the belt 33 on the large diameter side is tensioned, and high-speed transmission is performed when the belt 34 on the small diameter side is tensioned. The operation section of this transmission device 30 is constructed as shown in FIG. 5, for example. 39.
39 is rotatably attached to the clutch shaft 36a, and an operating wire 41.41 is connected between the arc-shaped members 39b fixed to this arm and the tension pulley lever 40.
is installed. In addition, a cover 4 that covers the upper part of the arm
2 is provided with a U-shaped guide groove 43 into which the clutch lever 36 fits. When the clutch lever 36 is located at the center (N) of the guide groove 43, no operating force is applied to any of the wires 41, 41, so both belts 33 and 34 are in a relaxed state. No power is transmitted from the engine output shaft 23 to the counter shaft 24.

When the clutch lever 36 is tilted to the L side, the arm 39 (L) engaged with the clutch lever 36 is rotated, and the belt 3 is rotated.
3 is tensioned to perform low speed transmission. Further, when the clutch lever 36 is tilted toward the H side, the arm 39 (H) engaged with the clutch lever 36 is rotated, thereby tensioning the belt 34 and performing high-speed transmission. In this way, the transmission device 30 serves as both a clutch and a transmission, and is operated by a single lever.

Note that a belt 46 that transmits power to a hydraulic pump 45 is also hung on the pulley 31.

The main mission case 5 includes a change mission section 5a that constitutes the vehicle body frame, and a front differential section 5b that is located at the rear of the change mission section 5a and is rotatably supported in a plane perpendicular to the direction of travel.
It consists of.

The change mission section 5a includes a front end portion of the counter shaft 24 and an intermediate shaft 50. A mission output shaft 51 is supported, and a plurality of gears 53 to 59 are attached to it. The rotational output of the counter shaft 24 is transmitted to the output shaft 51 via a gear train. When the gears 53 and 56 are engaged, the speed is on the road; when the gears 54 and 57 are engaged, the speed is for planting;
5 and gear 57 are in reverse running speed.

A differential device 61 supported in the horizontal direction by bearings 60, 60 is housed in the front differential section 5b. A portion 62a of the outer surface of the differential device 61 is connected to the mission output shaft 5.
Inside a can-shaped container 62 formed as a gear that meshes with the gear 59 of No. 1 and the gear 63 of the rear wheel transmission shaft 80 described later,
A primary bevel gear 66.66 is attached to a shaft 65 passing through the center of the container, and a primary bevel gear 66.66 is attached to the left and right front axles 67.67 perpendicular to the axis 65, respectively.
A secondary bevel gear 68.68 is provided which meshes with the secondary bevel gear. When there is a difference in the load applied to the left and right front axles when turning, etc.

The ratio of the driving rotational force transmitted to both axles changes as appropriate depending on the amount of load, and smooth running is achieved.

A final case 70 is provided at the outer end of the front axle case 9, and a front wheel support case 11 is further provided below the final case. The front axle 67 is transmission-coupled to a front wheel shaft 75 via a vertical shaft 74 within the cases 70 and 11 and a gear train. Tie rods 7 are attached to the left and right front wheel support cases ll and 11, respectively.
The outer ends of 6.76 are connected, so that when the handle is operated, it rotates in the same direction and by the same angle.

A rear wheel transmission shaft 80 that transmits power from the differential device 61 to the rear wheel transmission case 7 is provided inside the main frame 6 . A gear 81 attached to the rear end of the rear wheel transmission shaft 80 meshes with a gear portion 85 of a rotary cylinder 84 supported within the rear wheel transmission case 7 by bearings 83 , 83 . This rotating cylinder 84 is connected to left and right rear axles 88,88 via a side clutch device 87. That is, the square bar-shaped end 88a of the rear axle is inserted into the hollow part of the rotary cylinder 84.
, 88a are inserted, and clutch members 89, 89 are fitted therein so as to be slidable in the axial direction.

Teeth 91 formed on the outer circumference of the clutch member 89,89 mesh with teeth 92 formed on the inner surface of the rotary cylinder.

The clutch member 89 is connected to an operating part 95 by a connecting member 94, and when this operating part 95 is operated by a shifter 96, the clutch member 89 is moved to the rear axle end 88a.
, the rotary cylinder 84 and the clutch member 89 are disengaged, and the side clutch 87 is disengaged. Furthermore, when the shifter 96 is operated to disengage the side clutch 87.87, the plate brake device 97.97 is automatically applied. The rear axle 88 is connected to a rear wheel shaft 99 via a shaft 98 and a plurality of reduction gears.

A safety clutch 1OO is installed inside the planted clutch case 25.
1 transmission device 101 and a fixed position clutch 102 are provided, and torque input from the counter secondary shaft 24 is outputted to the counter secondary shaft 24'.

A gear cylinder 106 in which two gear parts 104 and 105 are formed is slidably fitted to the primary shaft 24 . Then, torque is transmitted from the secondary shaft 24 to the gear cylinder 106 via the pawl plate 108 fitted to the square rod portion 24a of the primary shaft as a safety clutch and the pawl plate 109 fixed to the gear cylinder 106. By pressing the gear cylinder 106 to the left in FIG. 8 with the spring 110, the claws 108a and 109a of both claw plates are engaged with each other on their inclined surfaces as shown in FIG. When this happens, the gear cylinder 106 moves to the right against the pressing force of the spring 110, and the transmission is cut off.

A rotatable cylindrical shaft 112 is loosely fitted onto the secondary shaft 24', and a gear shifter 115 having gear parts 113 and 114 that meshes with gear parts 104 and 105 of the gear cylinder is slid in the axial direction on the outer periphery thereof. They are fitted together so that they can move freely. This gear shifter 11
5 is provided with a groove l17 in the circumferential direction, and the clutch pin 1 is provided eccentrically on the shaft 118a of the speed change knob 118.
19 is engaged with the groove 117. Therefore, by turning the speed change knob 118, the gear shifter 115 is moved to the cylinder shaft 1.
12, the gear cylinder 106 and the gear shifter 115
For example, in FIG.
A high-speed transmission state where the gear portion 104 and the gear portion 113 mesh is shown by a solid line, and a low-speed transmission state where the gear portion 105 and the gear portion 114 mesh with each other is shown by a chain line.

The torque of the cylindrical shaft 112 is transmitted to the secondary shaft 24' via the fixed position clutch plate 121. The fixed position clutch plate 121 is movable in the axial direction, and is biased toward the cylinder shaft 112 by a spring 122. During operation, the claws 112a and 121a engage with each other. When the clutch plate 121 stops working, the clutch pin 123
is pushed toward the fixed position clutch plate 121, and its tip engages with the tapered surface 124 formed on the outer circumferential surface of the fixed position clutch plate, so that the secondary Shaft 24' is stopped.

The counter secondary shaft 24' extends rearward, and the PTO shaft 12
6.

In the power transmission system of this paddy field agricultural machine I, the engine output is transmitted to the counter shaft 24 by a transmission device 30 that functions as a main clutch and a transmission, and of this, the driving output is transmitted to the front portion 24 (A) of the counter shaft. ) to the main mission case 5, and the working output is transmitted to the PTO shaft 126 through the rear part 24 (B) of the counter shaft. The working clutch and transmission are located separately from the main mission case 5 at the rear part 24 (B) of the counter shaft.
It is located in the middle of the. With this configuration, the transmission shafts for transmitting working power do not overlap in the front-rear direction, and the overall structure is simplified. Further, by separating the drive system transmission and the work system transmission, the structure inside the transmission case is simplified and it is also preferable from the viewpoint of weight balance of the vehicle body.

A podium is placed over the chassis configured as described above, and a cockpit 130 is provided directly above the engine 20.

Furthermore, a link device 132 for attaching a working device is provided at the rear of the traveling vehicle 2. This link device 132 includes one upper link 134 and two lower links 135, 135 which are pivotally connected to a frame body 133 which is gate-shaped when viewed from the rear, and has a connector 136 at the rear end of both the upper and lower links. Frame 13
7 is installed. A hydraulic cylinder 138 is connected to the upper link 134, and by expanding and contracting this hydraulic cylinder, the entire link device 132 can be rotated up and down.

Next, in the rice transplanting device 3, a seedling mounting stand 141 is provided above a transmission case 140 in an inclined manner so that the front side is on the upper side. Seedlings are taken out one by one from the stand and planted in the field.

A center float 143 and a pair of left and right center floats 144, 144 are provided on the lower side of the transmission case 140. The rice transplanting device 3 is attached to the link device 132 by rotatably connecting the front end of the transmission case 140 to the connector 136, and slides on the paddy field surface as the traveling vehicle 2 travels, and also slides on the rice field surface as the vehicle 2 travels. Power is transmitted from

The fertilizer application device 4 includes a fertilizer tank 151 and a delivery part 152 integrally formed on the lower side thereof, which are provided at the rear end of the traveling vehicle 2, and the delivery part and a discharge part 154 provided on the side of the float are connected to a fertilizer pipe. 155. Feeding part 1
The power of 52 is taken out from the transmission case 140 of the rice transplanting device and transmitted by an appropriate transmission means.

As in the above example, instead of transmitting the power of the fertilizing device or the like from the transmission case of the rice transplanting device, the structure can be simplified by directly taking out the power from the planting clutch case 25 of the traveling vehicle. In that case, if the planting clutch case 25 is provided near the rear end of the counter shaft 24, as in the rice transplanter 4' shown in FIGS. This is convenient because the transmission is easy.

[Effects of the Invention] As explained above, the agricultural machine according to the present invention has a rationally configured transmission system, so it is possible to reduce the number of parts such as shafts, and it is easy to assemble and
Maintenance etc. can now be performed easily.

[Brief explanation of drawings]

FIG. 1 is a side view of one example of the agricultural machine according to the present invention, and FIG.
The figure is a plan view, Figure 3 is a bottom view of the main transmission, Figure 4 is a side view, Figure 5 is a perspective view of the main clutch lever operating section, and Figure 6 is an expanded sectional view of the main transmission case. , FIG. 7 is a sectional view of the rear wheel transmission case, FIG. 8 is a sectional view of the planted clutch case, and FIGS. 9 and 1θ are explanatory views of the main parts thereof. 11 and 12 are a side view and a plan view of different embodiments. 1.1'... Agricultural machine for paddy fields, 2... Traveling vehicle, 3
...Rice transplanting device, 4...Fertilization device, 5...Main transmission case, 7...Rear wheel transmission case, 10...Front wheel, 14...Rear wheel, 22...Engine, 23 ...Engine output shaft, 24, 24'...Counter shaft, 2
5... Planted clutch case, 30... Transmission device, 1
30...Cockpit. @Figure 5

Claims (1)

[Claims] (1) A four-wheel drive agricultural machine in which a working device is attached to the rear of a passenger vehicle, which has a main transmission case with a traveling transmission at the front of the vehicle body and a rear wheel transmission mechanism at the rear. A rear wheel transmission case is provided, and an engine is disposed at the front and rear intermediate portions of both cases, and the output shaft of the engine is provided so as to protrude forward or backward, and a counter shaft is provided that runs parallel to this to the side of the engine. , the output shaft and the counter shaft are transmission connected to each other,
Agricultural work characterized in that power is transmitted to the main transmission case at the front part of the counter shaft which is forward of the power transmission coupling part, and power is transmitted to the working device at the rear part of the counter shaft which is rearward of the transmission coupling part. Machine.