JPH0867102A - Wheel for small tiller - Google Patents

Abstract

PURPOSE: To prevent the road surface form being damaged, and achieve the stabilization of travel when a small tiller travels on a general road by fastening a lug disc, on one side of which lug plates are projected in a radial manner, and a supporting disc integrally to a shaft cylinder, with a rubber ring being held in a semi-circular recessed groove formed along the circumference of the supporting disc, thereby forming a wheel, and connecting the shafr cylinder to an axle of the tiller by inserting pins. CONSTITUTION: A lug disc 18, on one side of which lugs 17 are erected in a radial manner, and along the circumference on the other side of which a recessed groove 10 of semi-circular cross section is formed, and a supporting disc 15, along the circumference of which a semi-circular recessed groove 10 is formed, are overlapped on each other to hold a rubber ring 20, the outside diameter of which is larger than that of the lug-disc 15, between both the grooves 10. Both the discs 15, 18 are fastened to the flange 13 of the shaft tube 11 penetrated through the respective center holes 12 of these discs by bolts 21 and nuts 22 to form a wheel. In this case, the shaft tube 11 is fitted on the axle 23 of a small tiller, and they are fixed to each other by inserting connecting pins 26 into pin holes 24, 25 provided respectively in the shaft tube and the axle. Thus, when the small tiller travels on general road or on the ground of a garden, the road surface cannot be damsged by rubber ring traveling, and when the tiller travels in a vegetable garden, it can surely travel with the aid of the lugs 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small cultivator and relates to an improvement of its wheel structure.

[0002]

2. Description of the Related Art Conventionally, when performing light work such as weeding a narrow space on a small tiller with medium tillage, it is necessary to narrow the width of the wheels supporting the body of the tiller and the wheel spacing. For heavy work such as diving, it is preferable that the wheel width is wide, and measures are taken such as replacing the wheel or widening the wheel interval according to the content of the work. When narrowing the wheel width,
As it is, it is unstable and easy to fall sideways, and when cultivating, there is a problem that the wheel sinks in the soft upland and the wheel does not spin freely and it does not move forward. The tip of the rug prevents the aircraft from overturning, and when cultivating, the rug securely grasps the field soil,
I try to prevent the wheels from spinning. This wheel is effective when driving on field soil, but when driving on general roads and garden soil, the rug directly hits the road surface and damages the road surface and garden soil, and when running, the rug hits the road surface and makes noise. There was a problem such as emission. As a countermeasure, some lugs are provided slightly inward of the outer circumference of the wheels so that the lugs do not hit the ground when traveling on general roads, but the instability of running and noise during running are large. Has not been resolved.

[0003]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, when traveling on a general road or garden soil, the rug is prevented from directly hitting the road surface to avoid damage to the road surface and It is an object of the present invention to provide a small cultivator that reduces instability and noise during traveling.

[0004]

In order to achieve the above object, according to the present invention, a lug circle in which a lug is radially erected on one side of a metal disk and a groove having a semi-circular cross section is formed along the circumference of the other side. Plates and supporting discs with semi-circular concave grooves formed along the circumference of one side of the metal discs are overlapped, and the shaft cylinder is inserted into the center hole of each disc, and the two discs face each other. Between the concave grooves to put a rubber ring having an outer diameter larger than the lug disc, fasten both discs with a flange integrated with the shaft cylinder with bolts, and then insert the shaft cylinder into the axle of a small cultivator, A connecting pin was detachably inserted between the axle and the axle.

[0005]

[Function] When driving on a yard or a general road, the outer diameter of the rubber ring is larger than the lug disc and the support disc, so only the rubber ring touches the ground to float the lug disc and the support disc from the ground surface. It is possible to reduce the noise during traveling without traveling the vehicle in a standing state and damaging the road surface. During cultivating work, it sinks on the soft turf due to the weight of the small cultivator, and not only the rubber ring but also the lug disc and the support disc are grounded, and the rug disc is used to securely grasp the turf. It is possible to maintain the same propulsive force as before, and it is possible to perform tilling work without any problems even in shallow excavation such as weeding in medium tillage.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side view showing an entire small tiller of the present invention. 1 is a fuel tank for storing fuel such as gasoline or light oil, 2 is an engine, 3 is a transmission part, 4 is wheels, 5 is a rotor, and 6 is soil. Shows each shade. The operator carries out the plowing work while holding the handle 7 and the operating lever 8 and moving forward in the direction of the arrow. Reference numeral 9 is an auxiliary wheel.

FIG. 2 is an enlarged perspective view of the present invention, and FIG.
Is an exploded sectional view thereof. The wheel 4 has a lug disc 18 having radial lugs 17 on one side of the metal disc and a concave groove 10 of semicircular cross section formed on the other side of the metal disc, and a concave groove 10 of semicircular cross section. Support discs 15 formed along the circumference of one side of the metal discs are overlapped with each other, and the concave grooves 1 of these discs facing each other are formed.
A rubber ring 20 having an outer diameter larger than that of the lug disc 18 is sandwiched between 0s, the shaft cylinders 11 are inserted into the center holes 12 of the respective discs, and the bolts 21 are attached to the flange 13 formed integrally with the shaft cylinders 11. And a nut 22 for fastening. A fixing hole 16 is formed in the flange 13 of the shaft cylinder 11 so as to correspond to the mounting hole 14 provided in the lug disc 18 and the support disc 15, and the second pin hole 25 passing through the shaft center on the other side. Penetrates through. A first pin hole 24 is provided in the axle 23 of the small cultivator, the axle cylinder 11 of the wheel 4 is fitted in the axle 23, and the first pin hole 24 and the second pin hole 25 provided in the axle cylinder 11 are inserted. Through connecting pin 2
The wheel 4 is securely fixed to the axle 23 by inserting 6 and inserting a retaining pin (not shown) at the tip of the connecting pin 26. With the above configuration, the rubber ring 20 is provided so as to project on the outer periphery of the wheel 4, and when the small cultivator travels on the general road, the rubber ring 20 does not directly contact the road surface and damage the road surface. In addition, the rubber wheel 20 can support a small cultivator widely to prevent it from falling sideways, thereby improving traveling stability and reducing noise. Further, as shown in FIG. 3, a plurality of holding holes 27 are provided in portions of the lug disc 18 and the support disc 15 close to the concave groove 10, and the rubber ring 20 is clamped in the concave groove 10 so that the bolt 21 and the nut 22. Groove 10
By closely contacting the periphery of the rubber ring 20, the rubber ring 20 can be securely fixed. In addition, a large number of protrusions 19 made of hard rubber are projected on the outer periphery of the rubber ring 20, and the protrusions 19 are brought into contact with the road surface, so that the running of the rubber ring 20 is stable without increasing the outer diameter of the rubber ring 20. And noise can be reduced.

Further, the ridges for weeding in the middle are closely spaced,
If the wheel width of 4 is wide and it interferes with the work,
It is possible to easily cope with the problem by removing the inner support disc 15 and the rubber wheel 20 and attaching only the outer lug disc 18 to the axle cylinder 11 and fixing it to the axle 23 of the small cultivator as shown in FIG. .

[0009]

As described above, according to the present invention, a wheel of a small cultivator is provided with a lug disc having a lug formed on one side and a concave groove having a semi-circular cross section along the circumference on the other side. A support disc with a semi-circular concave groove along the circumference is arranged so that the concave grooves face each other, and a rubber with an outer diameter larger than the outer diameter of the lug disk is placed in both concave grooves. It is formed by sandwiching the ring and fixing it to the barrel. By attaching this wheel to the axle of a small cultivator, the rubber wheel does not damage the road surface when traveling on general roads and garden soil, preventing stability and noise during traveling, and at the time of cultivating work. Even on soft field soil, the wheels will sink and the rug will surely grab the field soil for running, allowing for reliable cultivating work. Also, because the wheels can be disassembled and assembled freely, the lug disc,
It is possible to remove the support disc and the rubber ring from the axle cylinder and fix either the lug disc or the support disc to the axle cylinder to select a vehicle width corresponding to the ridge width.

[Brief description of drawings]

FIG. 1 is a side view showing an entire small cultivator embodying the present invention.

FIG. 2 is an enlarged perspective view of the wheel of FIG.

FIG. 3 is an exploded sectional view of the wheel of FIG.

FIG. 4 is an exploded cross-sectional view of another usage example of the embodiment of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuel tank 2 Engine 3 Transmission part 4 Wheel 5 Rotor 6 Soil shelter 7 Handle 8 Operating lever 9 Auxiliary wheel 10 Recessed groove 11 Shaft cylinder 12 Center hole 13 Flange 14 Mounting hole 15 Support disk 16 Fixing hole 17 Lug 18 Lag circle Plate 19 Protrusion 20 Rubber Wheel 21 Bolt 22 Nut 23 Axle 24 First Pin Hole 25 Second Pin Hole 26 Connecting Pin 27 Clamping Hole

Claims (1)

[Claims] 1. A lug disc having a ridge radially standing on one side of a metal disc and a groove having a semi-circular arc cross section formed along the circumference of the other side, and a rug disc having a semi-circular arc cross section. The support discs formed along the circumference of one side of the plates are overlapped and the shaft cylinder is inserted into the center hole of each disc, and the outer diameter is the lug disc between the opposed concave grooves of both discs. Both discs are sandwiched with a larger rubber ring by bolts to the flange integrated with the shaft cylinder with bolts, so that the shaft cylinder is inserted into the axle of the small cultivator, and the connecting pin can be freely attached and detached between the shaft cylinder and the axle. Wheels of small tillers that are inserted.