JP2540097B2 - Forward-tiling walking tractor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a so-called forward-tiling type walking tractor in which cultivation and running of an airframe are performed in parallel by an axle-type tilling rotor. 2. Description of the Related Art In a forward-walking tillage type walking tractor which has been widely used in conventional greenhouse cultivation and the like, a small-sized walking tractor called a tiller is provided with a cultivating rotor (claw wheel) instead of a traveling wheel on the traveling shaft. In addition, a downward resistance rod is installed to the rear of the cultivating rotor to add resistance to the running of the airframe. If the plowing rotor is driven at a rotation peripheral speed higher than the forward speed of the airframe, the difference between the plowing rotors acts on the ground surface as slip of the plowing rotor, and as a result, if the sliding of the plowing rotor is large, the plowing rotor rotates at the same position. Therefore, the working depth increases, and conversely, if the slip of the tilling rotor is small, the forward speed increases and the working depth decreases. Utilizing this property, an operator can raise or lower the handlebar of the machine to change the depth of the resistance rod in the ground to change the running resistance to increase or decrease the slip of the tilling rotor.
The method of operating the working depth is widely used. However, since the operation of moving the handle up and down depends on the delicate force of the operator,
It is extremely difficult to maintain stable tilling while maintaining a constant cultivation depth and a constant speed, which requires skill and great effort of the operator. Therefore, an object of the present invention is to provide a device that eliminates such an up-and-down operation of a handle that requires labor, can tilling lightly at a stable tilling depth, and can finish a field scene after tilling evenly. is there. [0004] In order to achieve the above object,
The forward swivel-type walking tractor of the present invention has a resistance rod fixed downward at the rear of an axle type cultivating rotor that doubles as cultivating and traveling of the aircraft, and a pair of car rotors are installed on the left and right of this resistance rod. Equipped with a reduction mechanism that drives the rotor to rotate at a very low speed by the power of the engine mounted on the machine,
The car rotor is characterized by advancing the machine body. In the present invention, the tiller rotor rotates at a high speed to support and till the airframe, while the car rotor is driven at a very low speed by the reduction mechanism. Here, since the car rotor is provided with lugs on the outer periphery, the forward speed of the fuselage is defined by the rotational peripheral speed of the car rotor, and the fuselage always advances at a speed equal to the rotational peripheral speed of the car rotor. Therefore, the difference between the peripheral speed of rotation of the tilling rotor and the forward speed of the airframe, that is, the slip of the tilling rotor is always constant. Therefore, according to the present invention, the tillage can always be carried out at a stable tillage depth, and there is no need to raise and lower the handle which requires labor of the operator. Further, since the car rotor has a leveling function, the field scene can be finished evenly at the same time as plowing. In addition, according to the present invention, since the resistance rod facing downward is to be inserted in the soil and most of the running resistance is carried by the resistance rod, the load on the car rotor can be small. Therefore, a large load is not applied to the speed reducing mechanism, and the mechanism can be designed small and simple. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a forward-moving plowing type walking tractor of the present invention, 2 is its body frame, 3 is an engine, 4 is a tilling rotor, 5 is a rear hitch for towing, and 1A.
Is a handle. The tail wheel unit 6 is formed by integrally mounting the car rotors 7, 7 and the resistance rod 10 on the tail wheel frame 6A, and is detachably connected to the rear hitch 5 of the walking tractor 1. The resistance rod 10 is fixed downward to the tail wheel frame 6A. Reference numeral 10A is an adjusting lever for adjusting the mounting height of the resistance rod 10, that is, the depth of insertion into the soil. The car rotors 7 and 7 are formed by arranging a large number of strip-shaped lugs 9 in parallel with the axle 26 between a pair of annular rims 8 spaced apart from each other. Install a pair. The power transmission path in this embodiment is as shown in FIG. The output pulley 11 of the engine 3 and the passive pulley 13 of the countershaft 12 are connected by a belt 14, and one of the countershafts 12 is connected to a sprocket 16 in a chain case 15.
And connected to the tillage rotor 4 via a chain 17. The other end of the sub shaft 12 is connected to a pulley 21 on the input side of the continuously variable transmission 20 via a pulley 18 and a belt 19, and a sprocket 22 on the output side of the continuously variable transmission 20 is connected via a chain 23. , Input sprocket 2 of chain case 24
Connect to 5. Then, the car rotors 7, 7 are attached to both ends of the output shaft 26 of the chain case 24. Reference numeral 27 denotes a speed change lever that changes the speed reduction ratio of the continuously variable transmission 20. Here, a power transmission path from the pulley 18 to the output shaft 26 via the continuously variable transmission 20 constitutes a speed reduction mechanism 31. The output speed of the engine 3 is about 1800 rp
m, the rotation speed of the tilling rotor 4 is about 50 to 60 rpm,
Further, the rotation speed of the car rotor 7, 7 on the output side of the speed reduction mechanism 31 is set to about 1.5 to 4 rpm. Next, the operation of the embodiment constructed as described above will be described. Now, when the Aircraft 1 is placed on the field,
A large part of the weight of the car is held by the tilling rotor 4, and the lug 9 and the resistance rod 10 of the car rotor 7 pierce the field scene. In this state, when the engine 3 is started, its power is transmitted to the cultivating rotor 4 via the counter shaft 12, and the cultivating rotor 4 rotates at a high speed (for example, 50 rpm). On the other hand,
The power of the engine 3 is transmitted through the reduction mechanism 31 to the car rotor 7
The car rotor 7 is rotationally driven at a very low speed (for example, 2 rpm). Here, while the tilling rotor 4 rolls in the field scene, the lug 9 of the car rotor 7 penetrating the field scene is used.
Also, since the running resistance of the soil acts on the resistance rod 10, the plowing rotor 4 slips and plowing the field scene. In this embodiment, since the car rotors 7, 7 having a large number of lugs 9 are rotationally driven at a very low speed in this embodiment, the forward speed of the machine body 1 is mediated by the lugs 9. Specified by the rotational peripheral speed of the rotor 7, the machine body 1 always advances at a speed equal to the rotational peripheral speed of the car rotor 7. As described above, in this embodiment, the difference between the rotational peripheral speed of the tilling rotor 4 and the forward speed of the machine body 1, that is, the slip of the tilling rotor 4 is always constant. Therefore, since the tilling depth of the tilling rotor 4 is also constant, the tilling can be performed at a stable tilling depth in the present embodiment, and the up and down operation of the handle 1A, which conventionally required skill and labor of the operator, can be performed. unnecessary. Further, since the car rotor 7 has a leveling action, the field scene can be finished evenly at the same time as plowing. Further, in the present embodiment, the resistance rod 10 which is to be inserted into the soil is provided downward, and most of the running resistance is reduced by the resistance rod 10.
, The load on the car rotors 7, 7 involved in traveling can be reduced. Therefore, a large load is not applied to the speed reduction mechanism 31 that drives the car rotors 7, 7, and the speed reduction mechanism 31
Has the advantage of being small and easy to design. If the forward speed is the same, there is a tendency that the softer the soil, the greater the plowing depth. However, in the present embodiment, the rotation speed of the car rotors 7, 7 can be adjusted by the shift lever 27. Therefore, for example, in a field with soft soil, operations such as increasing the rotation speed of the car rotor 7 to increase the forward speed are performed. This has the advantage that the cultivation depth can always be adjusted to a constant value regardless of the hardness of the soil. As described above in detail, according to the present invention, the cultivating rotor is driven at a constant high speed, while the car rotor provided with lugs on the outer periphery is driven at a constant fine speed by the reduction mechanism. Therefore, the forward speed of the fuselage is defined by the rotational peripheral speed of the car rotor, and the fuselage always advances at a constant speed equal to the rotational peripheral speed of the car rotor. Therefore, the difference between the tilling rotor and the forward speed, that is, the slip of the tilling rotor is always constant. Therefore, according to the present invention, the tillage can always be carried out at a stable plowing depth, and there is an excellent effect that there is no need to raise and lower the handle which requires the labor of the operator. Further, since the car rotor has a leveling function, the field scene can be finished evenly at the same time as plowing. In addition, according to the present invention, since the downward resistance rod to be inserted into the soil is provided so that the resistance rod bears most of the running resistance, the load on the car rotor can be small. Therefore,
A large load is not applied to the reduction mechanism, and the mechanism can be designed small and simple.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a forward and forward plowing type walking tractor according to an embodiment of the present invention. FIG. 2 is a diagram showing a power transmission path according to the embodiment of the present invention. [Explanation of Codes] 1 walking tractor 4 tilling rotor 6 tail wheel unit 7 car rotor 9 lug 10 resistance rod 20 continuously variable transmission 31 speed reduction mechanism

Claims (1)

(57) [Claims] A resistance rod is fixed downward at the rear of an axle type cultivating rotor that doubles as tillage and traveling of the aircraft, and a pair of car rotors are installed on the left and right of this resistance rod. A forward cultivating walking tractor equipped with a speed reduction mechanism that rotates at a very low speed by the power of the engine mounted on the aircraft, and advances the aircraft with this car rotor.