JP2870960B2 - Riding agricultural work machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding agricultural working machine in which working devices such as a seedling planting device and a management working device are mounted on a rear portion of an airframe.

[Conventional technology]

Conventionally, a riding agricultural work machine in which a heavy working device is mounted on the rear of the aircraft, the forward movement of the aircraft, when crossing ridges, when escaping from the field, and when loading on a transport vehicle, the weight center of gravity moves backward. There is a risk that the front of the aircraft will rise and fall. To eliminate this danger, refer to Japanese Patent Laid-Open No. 1-132307.
As disclosed in Japanese Unexamined Patent Application Publication No. HEI 9-205, there has been a configuration in which an operator can get off the aircraft and operate from the front of the aircraft.

[Problems to be solved by the invention]

With the conventional technology described above, the operator gets off the aircraft, so that the danger of the operator himself can be avoided, but the operator may get off the aircraft, and the aircraft may further fall forward and backward, and the aircraft may fall more and more backward. There is a problem that the property increases.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a steering handle 5 provided at the front of a body 1 having a working device 63 mounted at the rear, and a steering handle 5 provided behind the steering handle 5.
And a differential device with a differential lock for differentially transmitting the rotation transmitted from the engine to the left and right wheels 2, 2. The differential lock operating tool 9 of the differential device A riding farm working machine characterized in that it is provided near the steering handle 5 so that an operator riding on the machine body 1 can operate the steering handle 5 in front of the steering handle 5.

[Functions and Effects of the Invention]

In the riding agricultural machine according to the present invention, during normal traveling without greatly inclining forward and backward, the operator operates the steering handle 5 and the like while sitting on the seat 6 to operate the machine body 1. In addition, when the aircraft 1 is moved forward, when going over a ridge, when escaping from a field, or when loading the truck, when the front of the aircraft 1 is likely to rise and fall over,
The operator turns to the front side of the steering handle 5 and rides on the airframe 1 in a posture facing the rear of the airframe, and operates the steering handle 5 and the like to steer the airframe 1. The front part becomes heavy due to the movement to the front part, and the front part of the
Is suppressed. Then, at this time, when the rotation of the left and right wheels 2, 2 occurs more than necessary due to slipping or the like and the body 1 meanders, the operator remains on the body 1 on the front side of the steering handle 5. By operating the differential lock operating tool 9, the differential device can be switched to the differential lock state, whereby the meandering of the body 1 can be suppressed.

Therefore, the riding agricultural machine according to the present invention controls the body 1 as described above, thereby suppressing overturning and meandering of the body 1 and moving over the ridges or out of the field while moving the body 1 forward, or carrying the vehicle. And so on.

〔Example〕

 Next, an embodiment of the present invention will be described.

As shown in FIG. 1, a pair of front wheels 2, 2 and rear wheels 3, 3 are provided at the lower part of the body 1 respectively. A steering post 4 extends rearward from the front of the body 1 and is attached with a steering bundle 5. After the steering post 4, an operator seat 6 for steering the steering handle 5 is provided, and an engine (not shown) is accommodated below the seat 6.

As shown in FIG. 2, a pair of brake petals 7, 7 are provided on the right of the steering post 4, and a clutch petal 8 and a differential lock pedal 9 are provided side by side on the left thereof. In particular, the diff lock petal 9 has a roller 10
, So that it can be easily operated from behind or from the front.

As shown in FIG. 3, a pair of sheaves 12, 13 are fixed to the end of the output shaft 11 from the engine, and the sheaves 16, 17 are fixed to the end of the input shaft 15 protruding from the gear box 14, 12,16 each
And the tuners 18 and 19 are wound around the tuners 13 and 17, respectively. This band 1
8 and 19 are loosely wound and provided with a roller (not shown), and the roller is operated by the clutch petal 8,
These tension bands 18, 19 are tensioned or loosened to form a tension clutch.

A wheel drive shaft 20 and an intermediate shaft 21 are provided so as to sandwich the input shaft 15, and a transmission gear 22 mounted to the wheel drive shaft 20 so as to move in the axial direction includes five gears 23 fixed to the input shaft 15. Of these, the latter two are selectively engaged to form a transmission.

A central gear box 24 is fixed behind the gear box 14, and is provided with a front wheel differential. That is, the central gearbox
The differential case 25 for the front wheels is supported by 24, and its ring gear
A bevel gear 27 at the rear end of the wheel drive shaft 20 meshes with 26. A pair of front wheel drive shafts 28, 29 extend left and right from the differential case 25, and bevel gears 30, 30 at both ends thereof are bevel gears 32, 32 in front wheel gear boxes 31, 31, respectively.
Are engaged. Steering shaft 33 with bevel gears 32, 32 fixed
Reference numeral 33 extends downward and is rotatably mounted on the steering gear boxes 34, 34, and its lower bevel gears 35, 35 mesh with bevel gears 69, 69 fixed to the front axles 36, 36. The front wheels 2,2 are fixed to the front axles 36,36.

A clutch 37 is attached to the left front wheel drive shaft 28 so as to be pushed out by a spring 38, and the clutch 37 is
Moves inward against the spring 38, and the claws of the
The differential of the front wheel differential device is stopped (diff lock). A lever 40 is fixed to the outer end of the operating rod 39, and is connected to the differential lock pedal 9 by a rod 41.

A rear wheel gear box 42 is provided after the central gear box 24, and a distribution gear 44 is provided at the center of an operating shaft 43 provided therein.
The rotation of the ring gear 26 is transmitted by the shaft 45.

A pair of clutches 48, 48 each having a tooth profile 46 and a pressing plate 47 on the inside and outside are pressed inward by respective springs 49, 49, and the inner ends of the tooth profiles 46, 46 are claw on the side surface of the distribution gear 44. It is attached to the operating shaft 43 so as to mesh with. Left and right clutch 48,4
8 are respectively connected to the brake pedals 7,7, and when the brake pedals 7,7 are depressed, the clutches 48,48 push and contract the springs 49,49 and move outward, and the inner ends of the tooth shapes 46,46 Distribution gear 44
Get away from your nails. When the brake petals 7, 7 are further stepped on, the pressing plates 47, 47 come into contact with the friction plates 50, 50 to apply braking.

A pair of gears 51, 51 are fixed to the inner ends of the left and right rear wheel drive shafts 52, 52, and sprockets 53, 53 fixed to the outer ends thereof and sprockets 55, 55 fixed to the inner ends of the rear axles 54, 54. Chains 56 and 56 are wound around 55. At the outer ends of the rear axles 54, 54,
The rear axles 3, 3 are fixed.

As shown in FIG. 1, a knuckle arm 57 operated by the steering of the steering handle 5 is provided at the lower front part of the body 1 and the arms 58, 58 of the steering gear boxes 34, 34 and the rods 57, 59 are connected to the rods 59, 59. Are linked by

As shown in FIG. 3, a speed change gear 60 is mounted on the intermediate shaft 21, and selectively meshes with the front gears 23, 23 to form a PTO shaft 61.
It is made to change the number of revolutions. The central gear 23
The reverse rotation intermediate gear 62 meshes, and the transmission gear 22 meshes with the rear end of the gear 62 that moves forward.

Also, as shown in FIG. 1, the seedling plant 63 is connected to the rear portion of the machine body 1 by a link 64 to form a riding rice transplanter. The seedling plant 63 mainly includes a central gear box 65, a seedling table 66 that moves left and right, and an implanting rod that rotates so as to pass through a lower portion of the seedling table 66.
67 and a float 68 that slides on the mud surface.

In the riding rice transplanter configured as described above, when moving the seedlings in the field, the operator arrives at the seat 6 and works while steering with the steering handle 5. That is, the rotation of the engine is controlled by the output shaft 11. Car 12 (or car 13), car 18 (or car 19), car 16 (or car)
17) ・ Input shaft 15, Gear 23, Transmission gear 22, Wheel drive shaft 20 ・
Bevel gear 27, ring gear 26, differential gear, drive shaft 28, 29, bevel gear 30, 30, bevel gear 32, 32, steering shaft 33, 33, bevel gear 69, 69 and front wheels 36, 36 in this order. To rotate the front wheels 2,2.

The rotation of the ring gear 26 is performed by rotating the shaft 45, the distribution gear 44, the clutch 48, 48, the gear 51, 51, the rear wheel drive shaft 52, 52, the sprocket 53, 53, the chain 56, 56, the sprocket 55, 55, and the rear axle. Proceed in this order on 54,54 to reach the rear axle 3,3.

On the other hand, the rotation of the input shaft 15
After passing through 60, it reaches the gear box 65 from the PTO shaft 61, and
6 is moved right and left, and the implanted rod 67 is turned.

Then, with the rotation of the front axles 2,2 and the latter wheels 3,3, the riding rice transplanter advances while the slide 68 slides on the mud surface, and the tip of the seedling mounting table is rotated by the rotation of the implantation rod 67. Take out the seedlings above 66 and insert them into the mud surface.

When the transfer of seedlings from one field to the next is completed, the seedlings cross the ridges separating the fields. When the ridge is low, the operator can stay at the previous position, but when the ridge is high, the operator moves to the front of the steering handle 5 and takes a rearward posture with respect to the forward direction of the body 1.

That is, this riding rice transplanter hits the ridge, and the front wheels 2,2
When the aircraft rides on the ridge, the body 1 tilts greatly upward and the center of gravity moves backward. However, since the operator is riding in front of the steering handle 5, the center of gravity is adjusted to the front, and the vehicle falls down. Can be prevented.

Also, at this time, if there is a difference between the resistances received by the left and right front wheels 2, 2, a speed difference occurs in the rotation of the left and right front wheels 2, 2, and the vehicle starts to meander greatly. Step on the differential lock petal 9 from the position. Then the rod
41 rotates the lever 40, the operating rod 39 pushes the clutch 37 to the left, and its pawl meshes with the pawl of the differential case 25. That is,
Since the left and right front wheel drive shafts 28, 29 rotate at the same speed with the differential stopped, the left and right front wheels 2, 2 rotate at the same speed. Therefore, the above-mentioned meandering is prevented, and the ridge can be safely crossed.

In the embodiment, the power transmission to the rear wheels 3, 3 is constituted by a side clutch type. However, this is constituted by a differential with a differential lock, and the differential between the front and rear differentials is operated by operating the differential lock petal 9. It is good to constitute so that movement may be stopped simultaneously.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter embodying the present invention, FIG. 2 is a rear view of a front part thereof, and FIG. 3 is a transmission mechanism diagram thereof. In addition, the code | symbol in a figure is as follows. 1 ... body, 2 ... wheels 5 ... steering wheel 6 ... seats, 9 ... diff lock petals

Claims (1)

(57) [Claims] 1. A steering handle 5 provided at a front portion of an airframe 1 having a working device 63 mounted at a rear portion thereof, and a seat 6 for an operator who operates the steering handle 5 at a rear portion thereof.
And a differential device with a differential lock for differentially transmitting the rotation transmitted from the engine to the right and left wheels 2, 2. The differential lock operating tool 9 of the differential device includes an operator on the seat 9 and the body 1 on the front side of the steering handle 5. A riding agricultural work machine is provided near the steering handle 5 so that an operator riding on the vehicle can operate the agricultural machine.