JP2627710B2 - 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 tilling type walking tractor widely used in conventional house cultivation and the like, a tilling rotor (pawl) is used instead of running wheels on a running axis of a small walking tractor called a tiller. At the rear of the tilling rotor for attachment, a downward resistance bar that protrudes the fuselage to protrude is protruded. However, if the cultivating rotor is driven at a rotational peripheral speed greater than the advancing speed of the fuselage while applying resistance to the forward movement of the fuselage with this resistance bar, the difference between the two acts on the ground surface as the sliding of the cultivating rotor. If the slip is large, the tillage rotor rotates at the same location, so that the tillage depth increases. Conversely, if the tillage rotor has a small slippage, the forward speed increases and the tillage depth decreases. Utilizing this property, a method in which an operator raises and lowers the handle of the fuselage to change the depth of the resistance bar underground, and changes the running resistance to increase or decrease the sliding of the tilling rotor, thereby operating the tilling depth. Widely used. [0003] However, since the operation of raising and lowering the handle 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-tiling-type walking tractor of the present invention has a car rotor installed behind an axle-type cultivating rotor that performs both cultivation and running of the machine, and the car rotor is driven to rotate at a low speed by the power of an engine mounted on the machine. A speed reduction mechanism is provided, and a rake is provided behind the car rotor to advance the fuselage by rotation of the car rotor. In the present invention, the tilling rotor rotates at a high speed to support and cultivate the body, while the car rotor is driven at a very low speed by the speed reduction mechanism, and the rake adds resistance to the forward movement of the body. 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 rotation peripheral speed of the tilling rotor and the forward speed of the machine body, 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 and the rake have a leveling action, the field scene can be finished evenly at the same time as tilling. In addition, in the present invention, a rake is provided at the rear end of the fuselage, and a part of the running resistance is borne by the rake, so that the load on the car rotor can be reduced. Therefore, a large load is not applied to the speed reduction mechanism, and the speed reduction mechanism can be designed to be small and simple. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a body of a forward-tiling type walking tractor according to an embodiment of the present invention, 2 denotes its body frame, 3
Is an engine, 4 is a tilling rotor, 5 is a hitch for mounting a rear unit, and 1A is a handle. The rear unit 6 has a car rotor 7 and a rake 10 integrally mounted on a frame 6A, and is detachably connected to the hitch 5 of the walking tractor 1. The car rotors 7, 7 are formed by arranging a number of band-shaped lugs 9 between a pair of annular rims 8 spaced apart from each other in parallel with the output shaft 26. Deploy. The rake 10 has a comb-like structure in which a large number of thin and short metal rods 10A are arranged obliquely rearward in parallel, and a pair of earth approaching plates 10B, 10B opened toward the front of the fuselage are fixed to the left and right ends thereof (see FIG. 2). ). The left and right width of the rake 10 is the cage rotor 7
Is slightly longer than that of the tilling rotor 4 and is approximately equal to that of the tilling rotor 4. 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 shift lever that changes the 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 rotation speed of the engine 3 is about 1800 rpm
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,
Most of the weight is supported by the tilling rotor 4, and the lug 9 of the car rotor 7 and the lower end of the rake 10 enter the field scene. In this state, when the engine 3 is started,
The power is transmitted to the tillage rotor 4 via the sub shaft 12, and the tillage rotor 4 rotates at high speed (for example, 50 rpm). On the other hand, the power of the engine 3 is transmitted to the car rotor 7 via the speed reduction mechanism 31, and the car rotor 7 has a very low speed (for example, 2 rpm).
m). 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.
And the rake 10 cause running resistance, so that the tilling rotor 4
Causes a slip and plows 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 as described above in this embodiment, the forward speed of the machine body 1 is increased by the car through the lugs 9. The airframe 1 always moves forward at a speed equal to the rotational peripheral speed of the car rotor 7, defined by the rotational peripheral speed of the rotor 7. As described above, in this embodiment, the difference between the rotation 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 tillage depth of the tillage rotor 4 is also constant, in this embodiment, the tillage can always be tillaged at a stable tillage depth, and the up and down operation of the handle 1A, which conventionally required skill and labor of the worker, can be performed. unnecessary. Furthermore, since the car rotor 7 rotates at a very low speed,
The effect of digging well and finishing the field scene evenly
Become an author. A rake 10 is provided behind the car rotor 7.
Since the rake 10 is placed, the rake 10 can finish the field evenly. The mulling boards 10B, 10B bring the soil from the left and right to the center and evenly level the field. In this embodiment, a downward rake 10 to be inserted into the soil is provided, and a part of the running resistance is reduced by the rake 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 that it can be designed compact and simple. 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. In addition, since the car rotor rotates at a very low speed,
The effect of biting and leveling is remarkable. Ma
Since the rake was installed behind the cage rotor,
Can finish the field evenly. In addition, in the present invention, since the rake that pulls the ground bears much of the running resistance, the load on the car rotor can be reduced. Therefore, a large load is not applied to the speed reduction mechanism, and the mechanism can be designed to be small and simple.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a forward-acting tillage 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. [Description of Signs] 1 Walking tractor 4 Tilling rotor 6 Rear unit 7 Car rotor 9 Lug 10 Rake 20 Continuously variable transmission 31 Reduction mechanism

Claims (1)

(57) [Claims] A deceleration mechanism in which a car rotor is installed behind an axle-type cultivating rotor that performs both cultivation and running of the machine, and this car rotor is rotationally driven at a very low speed by the power of an engine mounted on the machine. And a rake is provided behind the car rotor to advance the fuselage by the rotation of the car rotor.