JP2001269034A - Driving wheel structure of mowing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that the conventional mowing machine has an inferior traveling property depending on the state of a soil and does not exhibit a straight progressing property on an inclined ground due to its sideway flow. SOLUTION: This driving wheel structure is provided by installing ribs 51 in longitudinal and horizontal direction at a cylindrical body of a driving wheel 50 in an extending shape in the mower 1 having an engine 11, a mowing part and a steering handle 2, and also installing sideways flow-preventing plates in between the ribs 51 as extending in the perpendicular direction to the ribs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive wheel structure of a walking type mower for mowing a ridge or an agricultural road.

[0002]

2. Description of the Related Art Conventionally, various types of walking-type mowers have been known for mowing a ridge or an agricultural road. Typically,
The drive wheels have been designed to protrude lugs or the like on the outer periphery of rubber tires, iron wheels, or the like to increase gripping force, efficiently transmit the driving force of the engine, reduce slippage, and stabilize traveling. In addition, the technology aimed at maintaining the balance in the left and right direction of the aircraft and stabilizing traveling,
For example, as shown in Japanese Patent Application Laid-Open No. 10-150826, small-diameter portions are formed at the left and right centers of cylindrical driving wheels, and lugs are projected on the respective outer circumferences to stably travel even on terrain where the center of a ridge or the like rises. In addition, a technique for facilitating a mowing operation is disclosed. Also, JP-A-11-1
As disclosed in Japanese Patent No. 27656, there is disclosed a technique for stabilizing traveling by providing a large-diameter portion at both left and right end portions of a cylindrical drive wheel and a small-diameter lug portion at a middle portion between the left and right sides.

[0003]

However, in the former technique, the rugs protrude in a pin-like manner, so that the cut grass, dead grass, roots, etc. are liable to wind up. It was lowered and slippery, and running was unstable. In the latter technique, when mowing weeds that grow on soft soil with lots of moisture, the soil is clogged in the groove between the rugs, the grip force is reduced, and the wheels run idle. .

When a large diameter portion and a small diameter portion are combined with a driving wheel, a step is inevitably generated in the driving wheel. For example, when traveling on a narrow ridge, etc., if the width of the ridge is slightly wider than the width of the small diameter part, one will ride on the large diameter part and the other will travel on a slope when traveling on the small diameter part. It was not possible to mow the grass neatly. On the other hand, if the width of the ridge is slightly smaller than the width of the small diameter part, it is not a problem to run accurately according to the width of the ridge. Change direction and get on the other side,
We will be mowing while tilting left and right alternately,
Driving was unstable. Furthermore, in a sloped work site such as a bank, when the aircraft is driven in a direction perpendicular to the slope, there is a problem that the aircraft slides down the slope due to the weight of the aircraft.

[0005]

The above is the problem to be solved by the present invention. Next, means for solving the problem will be described. That is, in a mowing machine in which a steering wheel is protruded rearward from a traveling case and a driving wheel and a mowing blade for mowing are mounted on the steering case, the driving wheel is substantially perpendicular to the traveling direction. A polygonal cylindrical body having an axis.

According to a second aspect of the present invention, a rib is provided on the outer periphery of the drive wheel in parallel with the axis of the drive wheel.

According to a third aspect of the invention, the diameter of the rib is gradually reduced from the outside to the inside of the drive wheel.

According to a fourth aspect of the present invention, the rib has a triangular shape.

According to a fifth aspect of the present invention, a plate is mounted at an arbitrary position on the outer periphery of the drive wheel in a direction perpendicular to the axis of the drive wheel.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is an overall side view of a mower, FIG. 2 is a plan view of the same, FIG. 3 is a front view of a mowing part, FIG. 4 is a front view of one embodiment of a drive wheel, and FIG. FIG. 6 is a perspective view showing an example, FIG. 6 is a view showing traveling on a narrow ridge, FIG. 7 is a perspective view showing an embodiment in which the cross-sectional shape of the rib structure of the drive wheel is triangular, and FIG. It is a perspective view of one Example of a drive wheel.

First, referring to FIGS. 1, 2, 3 and 4,
The overall schematic configuration of the mower 1 will be described. The body of the mowing machine 1 has an engine 11 disposed on a transmission case 10 also serving as a body frame, and the transmission case 10 extends to both left and right sides. The cutting blade drive shafts 12 protrude downward from the left and right halfway portions of the transmission case 10 to fix the cutting blades 13, respectively.
The upper part and the side of 13 are covered with a cutting blade cover 14 to form a cutting section, and the cutting blade cover 14 is
Is fixed to the lower surface.

A traveling case 16 is provided on both sides of the transmission case 10, and the traveling case 16 is protruded rearward and downward, and a pair of left and right driving wheels 50L is provided below the traveling case 16. 50R, the drive wheels 5
0L and 50R are arranged behind the reaper. And
A handle base 23 protrudes rearward from the left and right center of the transmission case 10, and a telescopic steering handle 2 is mounted on the handle base 23 so as to be vertically rotatable and left and right. An operating portion 3 is provided at the rear of the handle 2, and the operating portion 3 has side clutch levers 4L and 4R, a handle vertical turning lever 5, a handle extendable lever 6L
Operation levers such as 6R and accelerator grip 7 are arranged.

In this manner, the output shaft of the engine 11 is inserted into the transmission case 10, the speed is changed in the transmission case 10, and the cutting blades 13, 13 and the driving wheels 50L, 50R are driven. Further, a side clutch mechanism is provided inside the transmission case 10 as steering means so that the power can be connected and disconnected by operating the side clutch levers 4L and 4R so that left and right steering can be performed.

Further, tail wheel locking mechanisms 20 are provided at the front left and right sides of the transmission case 10, and arms 21 are projected forward from the tail wheel locking mechanism 20 so as to be able to turn left and right. A caster type tail wheel 22 is mounted on the front end of the wheel 21. Thus, at the time of work, the arm 21 on which the tail wheel 22 is mounted is turned forward and locked, and at the time of movement, the arm 21 is turned backward to facilitate movement.

Next, an embodiment of the structure of the drive wheel 50 according to the present invention will be described with reference to FIG. Drive wheel 5
Reference numeral 0 denotes a left-right symmetrically arranged pair of right and left, and a main body 53 is a polygonal cylindrical body (polygonal prism) having a bottom surface of a polygon.
In this embodiment, the shape is hexagonal, and may be pentagonal, heptagon or more. However, it is a polygon that does not narrow the interval between the ribs 51 on the outer periphery. Are protruded radially on the outer periphery of the apex portion in the longitudinal direction of the main body 53 of the drive wheel 50, and the ribs 51 are formed in a substantially triangular shape. It is configured and arranged in parallel with the axis of the drive wheel 50 so that the wheel diameter of the wheel as a whole from the outside to the center side from the outside gradually decreases. In addition, the rib 51
A lateral flow prevention plate 52 is provided near the outside of 51... In a direction perpendicular to the axis of the drive wheel 50. The lateral flow prevention plate 52 has a disk shape in a sectional view.

Since the ribs 51, 51,... Of the flat plate-like projections are constructed in this manner, the cut grass does not wind up, and the gap between the ribs 51 is not narrow. They do not bite things or soil. Even when the soil is soft, the rib 51
51... Can be stably driven into the soil without idling of the wheels.

A rib 51 protruding from the drive wheel 50
51 are configured so that the center has a low inclination, the inside of the drive wheel 50 as a whole has a small diameter, and has no step in the longitudinal direction of the drive wheel 50. In this way, as shown in FIG. 6, even when traveling on a ridge that is narrower than the drive wheels 50, the mower 1 rides on the center of the ridge and travels without being affected by the width of the ridge. 1 can be run horizontally and stably.

Further, when working on an inclined portion such as a bank or a slope, gravity is applied in a downward direction, and the mower 1 tends to slide down along the slope. The engagement prevents the drive wheels 50 from slipping in the lateral direction. In this way, it is possible to prevent the mower 1 from sliding down the slope.

The drive wheel 50 is not limited to a polygon as described above, but may be a drive wheel 70 having a star-shaped cross section as shown in FIG. That is, triangular prism-shaped ribs 71, 71,... Are attached at equal intervals on the outer periphery of a circular column or a polygonal column in parallel with the axle, and the cross-sectional area is reduced from the outside to the inside of the wheel. The inside diameter of the wheel 70 as a whole is reduced. Further, a lateral flow prevention plate 72 is provided on the outer periphery in the same manner as described above. With this configuration, the same effects as those of the embodiment shown in FIG. 5 can be obtained. Further, in the present embodiment, the ribs are in a triangular prism state, so that the mechanical strength is superior to the plate-like ribs 51, and the durability of the drive wheels can be improved. However, the main bodies 53 and 73, the ribs 51 and 71, and the lateral flow prevention plates 52 and 72 can be integrally formed.

The structure of the driving wheels is not limited to a left-right split type for the purpose of turning the body, but as shown in FIG.
The drive wheels 80 may be integrally formed with the wheels 1, 51.

[0021]

As described above, the present invention has the following advantages. That is, claim 1
As described in (1), in a mower in which a steering wheel protrudes rearward from a traveling case and a driving wheel and a mowing blade are mounted on the steering case, the driving wheel has an axis substantially at right angles to a traveling direction. Since it was a polygonal cylinder,
It is not necessary to frequently clean the drive wheels without biting grass or other objects that have fallen into the soil. .

According to the second aspect of the present invention, the rib is provided on the outer periphery of the driving wheel in parallel with the axis of the driving wheel. Even without the wheels spinning,
It can run stably.

In addition, since the diameter of the ribs is gradually reduced from the outside to the inside of the driving wheel, one of the right and left ribs becomes higher even when traveling on a ridge which is narrower than the driving wheel. It is possible to run stably without running or running with only one of the wheels riding on.

Further, since the rib has a triangular shape, the structure can be simplified and manufactured at a low cost, the mechanical strength of the rib increases, and the durability of the driving wheel improves. You can do it. In addition, it can be attached to the cylindrical main body without a gap, and the entanglement of grass can be prevented.

According to a fifth aspect of the present invention, the plate is mounted at an arbitrary position on the outer periphery of the drive wheel in a direction perpendicular to the axis of the drive wheel. Even at a certain work site, the vehicle body can be driven straight forward without the vehicle body flowing sideways.

[Brief description of the drawings]

FIG. 1 is an overall side view of a mower.

FIG. 2 is a plan view of the mower.

FIG. 3 is a front view of the reaper.

FIG. 4 is a front view of one embodiment of a drive wheel.

FIG. 5 is a perspective view illustrating an embodiment of a rib structure of a drive wheel.

FIG. 6 is a diagram showing traveling on a narrow ridge.

FIG. 7 is a perspective view showing an embodiment in which the cross-sectional shape of the rib structure of the drive wheel is triangular.

FIG. 8 is a perspective view of one embodiment of a drive wheel having a single structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Handle 11 Engine 13 Cutting blade 20 Left-right rotation lock mechanism 21 Arm 22 Non-drive wheel 50 Drive wheel 51 Rib 52 Cross flow prevention plate 53 Main body 71 Triangular rib

Claims (5)

[Claims] 1. A mowing machine in which a steering handle protrudes rearward from a traveling case, and a driving wheel and a mowing blade are mounted on the steering case, the driving wheel having an axis substantially perpendicular to a traveling direction. A drive wheel structure for a mower, characterized by having a polygonal cylindrical body having the same. 2. A drive wheel structure for a mowing machine according to claim 1, wherein a rib is provided on an outer periphery of said drive wheel in parallel with an axis of said drive wheel. 3. The drive wheel structure of a mowing machine according to claim 2, wherein the diameter of the rib is gradually reduced from the outside to the inside of the drive wheel. 4. A drive wheel structure for a mowing machine according to claim 2, wherein said rib has a triangular shape. 5. A drive wheel structure for a mowing machine according to claim 1, wherein a plate is mounted at an arbitrary position on the outer periphery of said drive wheel in a direction perpendicular to the axis of said drive wheel.