JP2001190101A - Device for supporting front rotary tilling part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of readily carrying out the regulation of tilling depth so as to be deeper by upwardly swinging a gauge wheel by one touch operation, and capable of allowing a tiller to travel while lifting tillage tines from the ground surface by downwardly swinging the gauge wheel by the one touch operation. SOLUTION: This device for supporting a front rotary tilling part is characterized in that the gauge wheel 28 is regulated so that the posture may be changed in the nearly vertical direction or the nearly horizontal direction in the front view around an axis center 12 regulated so as to be up in front in the aslant front direction, in a front rotary tiller 7 equipped with a transmission case 1 having an attaching seat 10 for an engine 3 attached thereto in the front and rear direction on the upper surface, and protruding a tillage shaft 2 in the right and left direction of the front lower part, and a wheel shaft 4 in the right and left both sides at the rear lower part, and having tillage tines 15, 15... attached around the tillage shaft 2 in the radial direction, a main tillage cover 8 covering the upper side of the tillage tine 15, and the gauge wheel 28 installed in the front part of the main tillage cover 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front rotary tilling part support device. An object of the present invention is to perform a simple switching operation to maintain tilling performance during tilling work in a field of a front rotary tilling apparatus and to maintain steering performance during road running after the work is completed.

[0002]

2. Description of the Related Art A conventional front rotary tilling section support device is disclosed in Japanese Patent Laid-Open No. 8-31.
It is publicly known as shown in JP 7702. In such a known object, the support arm of the gauge wheel is adjusted in the vertical direction in the main cultivation cover that covers the rotary tilling device at the lower front of the fuselage. And the amount of gauge wheel raised is small. In addition, when the lifting amount is increased, a hole for the support arm to escape at the front center of the main till cover is required. Further, as the gauge wheel rises, the swing fulcrum position of the support arm is higher, so that the gauge wheel projects forward. In such a conventional configuration, if there are ridges, standing trees, walls, etc., the gauge wheel will be in the way, it will be removed or there will be a lot of residual tillage, and the tillage adjustment using the gauge wheel will be deeply plowed. There are drawbacks such as inability to do so.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve such a drawback of the conventional apparatus, and has taken the following technical means. That is, a transmission case 1 in which a front and rear mounting seat 10 for mounting the engine 3 is provided on the upper surface, a tilling shaft 2 is protruded on the left and right sides of a front lower part, and a wheel shaft 4 is protruded on both left and right sides of a rear lower part. And the tilling claws 15, 15. . And install the tillage claw 15
In the front rotary tilling device 7 in which the upper part of the main cultivation cover 8 is covered with a gauge wheel 28 in front of the main cultivation cover 8, the shaft center 1 in which the gauge wheel 28 is raised obliquely forward.
The front rotary tilling unit support device is characterized in that the posture is changed around two around a substantially upright direction and a substantially horizontal direction when viewed from the front.

[0004]

Embodiments of the present invention will be described below. This embodiment relates to a front rotary tilling device 7, and includes a transmission case 1 disposed in the front-rear direction at a lower portion of the fuselage.
The transmission case 1 is disposed at the center in the left-right direction in a plan view so as to face the front-rear direction with the mounting seat 10 having a substantially horizontal direction in a side view on its upper surface. Then, tilling shafts 2 and 2 are protruded from the front end of the transmission case 1 on both left and right sides, respectively.
5,15. . And the tilling part 16 is comprised.

[0005] The transmission case 1 is divided into right and left cases. Although not shown, a transmission gear for traveling speed change, a sprocket for tilling transmission, a chain, and the like are provided therein.
The right and left cases are tightened with fasteners such as bolts and nuts to integrate the left and right cases. The transmission case 1 shown in FIG. 1 is provided with a substantially flat mounting seat 10 upward from the middle part in the front-rear direction to the rear, and the engine base 30 of the engine 3 is mounted on the mounting seat 10 with bolts, nuts and the like. Tightened and mounted.

[0006] Wheel shafts 4 and 4 are provided at the rear end of the transmission case 1 in the left and right lateral direction, and left and right drive wheels 18 are attached to the wheel shaft 4 so that the tread can be adjusted. Wheel axle 4
One handle frame 5 protrudes rearward and upward from the rear part of the transmission case 1 near the upper side, and the handle frame 5
The front end of the handle 6 is attached to the upper end of the.

[0007] The shape of the handle 6 projects obliquely rearward and rearward from the handle frame 5 in a side view, and the end side is substantially horizontal. A main shaft 20 projects from the left side of the engine 3, and a drive pulley 21 is attached to the main shaft 20. Further, an input shaft 23 to which a driven pulley 22 is attached protrudes from a side of the transmission case 1 below the main shaft 20. The V-belt 2 is located between the driving pulley 21 and the driven pulley 22.
4 is wound around and tensioned or loosened by a tension pulley (not shown) to serve as a main clutch.
When the pulley, which is a tension clutch, is moved in the direction in which the V-belt 24 extends, the driving force of the engine 3 is transmitted into the transmission case 1 via the input shaft 23. The outer periphery of the drive pulley 21, the driven pulley 22, and the pulley also serving as the main clutch is covered with a belt cover 39 for safety, so that the fingers and the like of the hand do not directly contact the V-belt 24.

With these constructions, the input shaft 23 to which the power is transmitted from the engine 3 is provided at an intermediate portion in the front-rear direction of the transmission case 1, and the tilling shaft 2 to which the power is transmitted from the input shaft 23, and the input shaft 23. Wheel shaft 4 to which power is transmitted
Are disposed at front and rear ends of the transmission case 1, respectively.
Further, since the engine 3 is directly mounted at a low position via the engine base 30 on the substantially flat mounting seat 10 integrally provided on the upper surface of the transmission case 1, the machine center of gravity is lowered and the work is stabilized. be able to.

In the conventional apparatus, a large space is provided between the upper surface of the transmission case and the engine base, so that the mounting position of the engine is unnecessarily high and the machine weight is increased. The tilling shaft 16 is formed by projecting tilling shafts 2 and 2 from the front end of the transmission case 1 on the left and right sides, respectively, and the tilling claws 15 are attached to a plurality of nail holders integrally mounted on the outer peripheral portion of the cultivating shaft 2.
Has an upper part covered with a main tillage cover 8 which is an arc-shaped cover. The main tillage cover 8 has the left and right middle portions of the cover attached to the wall of the transmission case 1 so as to cover approximately the upper half of the tillage portion 16 at about 180 degrees. A shaft having an axis 12 rising forward by about 30 degrees from the horizontal is integrally formed at the center of the left and right positions at an angle of about 30 degrees from the front edge of the outer periphery of the main till cover 8 by welding or the like. ing.

A gauge wheel 28 shown in the side view of FIG. 1 and the front view of FIG. 2 is disposed at the front end of the front rotary tillage device 7 and has a tilling claw 15 for digging in by its own weight. It supports the front of the aircraft so that it does not sink on soft soil. A gauge wheel 2 is provided at the lower end of a swing arm 14 comprising a support arm 9, a support cylinder 13 and a boss cylinder 11.
8 is attached. The swing arm 14 has the axis 12
, And the operation lever 25 protrudes upward diagonally in the opposite direction.

The gauge wheel 28 includes the support arm 9 and the support cylinder 1.
The distance between the axis 12 and the ground surface can be changed by adjusting the distance between the shaft 3 and the ground surface by removing the pin 40 and adjusting the expansion and contraction. Then, the swing arm 14 having the gauge wheel 28 attached to the distal end portion at the lower end is operated to swing around the axis 12 to swing upward in the horizontal direction as shown by the imaginary line in FIG. Swing arm 14
Is fixed, the gauge wheel 28 is rocked and fixed above the front edge of the main cultivation cover 8, the amount of protrusion of the fuselage forward is reduced, and the tilling operation can be performed near obstacles such as walls and ridges. . Also, since the support arm 9 has a caster angle as shown in FIG. 1, when the pin 40 is pulled out and the support arm 9 is turned back and forth, the height of the gage wheel 28 is changed while the vertical support height is changed. The amount of forward projection can also be reduced. When the gauge wheel 28 is lowered in the upright direction when viewed from the front, the swing arm 14 is fixed and held by the lower fixture 42. The upper and lower fixtures 41 and 42 are leaf springs attached to the outer surface of the main cultivation cover 8 and bent in a U-shape, and latch and hold the support cylinder 13 entering from the opening side.

As described above, in the present embodiment, the distance between the axis 12 and the ground surface can be reduced by changing the length of expansion and contraction of the support arm 9 and the support cylinder 13 or by reversing the support arm 9 with respect to the support cylinder 13. Because it can be changed, it can be easily changed from shallow tillage depth to deep tillage depth, and if adjustment is made with a gap between the lower end of the tilling claw 15 and the ground surface by the gauge wheel 28, the weight of the front part of the body is The driver can travel on the road while receiving the vehicle, and can travel without pushing down the steering wheel 6 by the operator. In addition, when plowing to the edge of the field, the gauge wheel 28 can be lifted and held at a high position by one-touch operation, so that the plowing operation can be easily performed to the ridge and the wall, and the plowing work near the field edge and around the tree is ensured. Can be done.

In the conventional apparatus, since the swing arm is mounted in the main till cover, the height of the gauge wheel 28 is low, which is a hindrance at the time of work. Holes for up and down are required, and there are drawbacks such as excavation mud blowing out from the holes.

FIGS. 3 to 6 show an embodiment of another component, which will be described below. FIG. 3 shows a rear rotary tiller 31 whose layout is conventionally known. The front rotary tilling device 7 includes the tilling unit 16 at the front of the body, while the rear rotary cultivator 31 includes the tilling unit 16a at the rear of the body. Transmission case 1
“a” stands upright in the vertical direction as shown in the figure. And
The engine 3a is mounted on a front frame 32 protruding forward from a vertically intermediate portion of the transmission case 1a.

The engine 3a is provided with a recoil starter device 33, and a handle 6a protruding to the rear of the body.
Rope 34 for starting the engine 3a attached to the rear end
When the rear end grip 35 is pulled, the engine 3a can be started. With this recoil starter device 33, the engine 3a
When the engine is started, the choke valve 36 that throttles the intake air of the engine 3a by an intake manifold (not shown).
Is simultaneously pulled by the rope 34 via the interlocking wire 37 at the time of starting, the starting can be easily performed even when the outside air temperature is low.

An interlocking configuration will be described. The rope 34 for starting the engine 3a when the engine is stopped is pulled by the interlocking wire 37 as shown in the plan view of FIG. 4, and as shown by the solid line, inward of the straight line connecting the grip 35 and the recoil starter device 33. I am loose. When the driver pulls the grip 35 strongly in the direction of arrow A for starting from this state, the rope 34 becomes straight as indicated by the imaginary line.

The movement shown in the direction of arrow B in FIG.
The choke valve 36 is pulled to promote the start. After the engine is started, when the grip 35 is returned until it comes into contact with the receiving member 38, the rope 34 returns to its original position and is slackened, the interlocking wire 37 is also slackened, and the throttle operation of the choke valve 36 is released. Reference numeral 38 denotes a pulley for changing the direction. According to this mechanism, if the base end of the interlocking wire 37 is attached to the rope 34 via the carabiner 43, the choke valve 36 can be pulled by the movement of the rope 34 in the direction B. By attaching the carabiner 43 to the rope 34, it is possible to prevent unintentional starting due to forgetting to pull the choke lever when starting in a cold region, and by removing the interlocking wire 37 from the rope 34, the fuel concentration at the time of starting in a warm region can be prevented. Thus, a non-starting device can be prevented, a simple configuration, an appropriate application can be selected, and a low-cost starting device can be provided.

[0018]

The operation and effect of the present invention are as follows.
A transmission case 1 having a mounting seat 10 in the front-rear direction for mounting, a tilling shaft 2 protruding left and right sides of a front lower part, and a wheel shaft 4 protruding left and right sides of a rear lower part. 2 radially around the tillage 15, 15,. . And the tilling claw 1
5 is covered with a main cultivation cover 8, and a gauge wheel 28 is provided in front of the main cultivation cover 8. As the configuration of the front rotary tilling unit support device is characterized in that the posture has been adjusted in a substantially upright direction and a substantially horizontal direction when viewed, the shaft center protruding out of the main tilling cover that covers the rotary tilling device in the lower front part of the fuselage The swing support arm of the gauge wheel can be adjusted and held down or laterally around the axis by one-touch adjustment so that the swing support arm does not immediately contact the main till cover when the gauge wheel rises. It swings upward and the amount of lifting of the gauge wheel increases. In addition, even if the lifting amount is large, there is no hole at the front center of the main tilling cover for the support arm to escape as before, so the excavated soil due to the rotation of the tilling claw can blow forward from the hole of the cover. Absent. Furthermore, since the gauge wheel swings up and down in the right and left directions, the gauge wheel projects forward with the swinging up of the support arm, as in the conventional case,
Since the gauge ring does not interfere with the ridges, standing trees, walls, etc., there is no problem of removing the tiller or leaving a lot of residual tillage as in the past. In the present invention, since the gauge wheel can be largely lifted and swung upward with one touch, the tillage can be easily adjusted more deeply. The one-touch swinging down of the gauge wheel has unique effects such as allowing the tilling claw to be easily lifted off the ground surface and run.

[Brief description of the drawings]

FIG. 1 is an overall side view of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an overall side view in which another configuration is folded.

FIG. 4 is an overall plan view of FIG.

5 is a partially enlarged view of a main part of the side view of FIG. 3;

FIG. 6 is a partially enlarged view of a main part in the plan view of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission case 2 Tilling shaft 3 Engine 4 Wheel axle 7 Front rotary tillage device 8 Main tillage cover 10 Mounting seat 12 Shaft center 15 Tilling claw 28 Gauge wheel

Claims (1)

[Claims] 1. An upper surface is provided with a mounting seat 10 in the front-rear direction for mounting the engine 3, a tilling shaft 2 is protruded on the left and right sides of the front lower part, and a wheel shaft 4 is protruded on the left and right sides on the rear lower part. A transmission case 1 which includes a tilling claw 1 in a radial direction around a tilling shaft 2;
5,15. . In the front rotary tilling apparatus 7 in which the upper part of the tilling claw 15 is covered with the main tilling cover 8 and the gauge wheel 28 is provided in front of the main tilling cover 8,
A front rotary tilling unit support device, characterized in that the posture is adjusted in a substantially upright direction and a substantially horizontal direction as viewed from the front, around an axis 12 having a front surface 8 raised diagonally forward.