JPH0999704A - Wheel for walking type work vehicle and traveling device of walking type work vehicle using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel for a walking type work vehicle which can be used between crops and even in a rice field narrow in an inter-ridge space without incurring inconvenience such thrust is reduced and a separating condition of soil splashed up by lugs gets worse in a two-wheel system walking type work vehicle excellent in stability at traveling time. SOLUTION: A wheel for a walking type vehicle is constituted by continuously arranging a rim 10 where plural lugs 10A are provided in a condition of projecting toward the lateral outside on one side in a boss part 11 connected to a wheel 4 so as to be freely mountable and demountable in a condition where a side end part 11a of the boss part 11 becoming the same side with a side end part 10a is displaced in a recessed shape in the projecting direction of the lugs 10A to the side end part 10a on the side where the lugs 10A in the rim 10 do not project.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel for a walk-behind work vehicle and a traveling device for a walk-behind work vehicle using the wheel.

[0002]

2. Description of the Related Art Conventionally, as a wheel for a walking type work vehicle as described above, for example, as disclosed in Japanese Utility Model Laid-Open No. 54-50303, a boss that is detachably attached to an axle is provided. An iron rim is provided on the outer circumference of the part through several spokes, and the entire circumference of this rim is covered with a rubber formed so that a plurality of lugs for obtaining thrust protrude to one side of the rim. There was one made up of things.

By the way, there are one-wheel type and two-wheel type walking type work vehicles for performing the tillage work between crops and the tilling work in the furrows. The one-wheel type is
Since the wheel width is narrow, it has an advantage that it can be used even in a field where crops and ridges are narrow, but it has a disadvantage that stability during running is deteriorated. On the other hand, the two-wheel type has an advantage that it is excellent in stability during running, but since it is equipped with a steering clutch for facilitating turning, it is not possible to narrow the left and right wheel spacing. Therefore, there is a disadvantage that it cannot be used in a field where crops and ridges are narrow. Therefore, there is a demand for the development of a walk-behind work vehicle that is a two-wheel type that excels in running stability and that can be used even in a narrow field between crops and ridges.

[0004]

However, in the wheel for a walk-behind work vehicle according to the above-mentioned prior art, the side end of the rim where the lug does not project and the side of the boss that is on the same side as the side end. The end portion is substantially aligned with the protruding direction of the lug, and the protruding end of the lug is further laterally outwardly projected than the side end portion of the boss portion on the same side as the protruding end. Therefore, when the lug of each wheel is mounted on the two-wheel type walking work vehicle in a state of protruding toward the lateral outer side of the machine body, the width of the left and right wheels is 200 to 300 mm.
In a narrow field where the distance between the crops is about 150 mm, the wheel causes the inconvenience of stepping over the crop, and in a narrow field where the ridge is about 150 mm, the wheel rides on the ridge and stability during traveling is poor. Or, it will cause inconvenience such as damage to the roots of crops that have grown on the side of the ridge with rugs. That is, the two-wheeled walking work vehicle equipped with the wheels according to the above-described conventional technology cannot be used in a field where crops and ridges are narrow.

By the way, it is conceivable to reduce the width of the gap between the left and right wheels by shortening the protruding length of the lug in the above-mentioned conventional wheel, but the lug is formed to obtain thrust. The inconvenience of causing a reduction in thrust occurs instead of the width of the left and right wheels being narrowed. Further, by reversing the wheels of the above-mentioned conventional technology, the lugs of the respective wheels are attached to the two-wheel type walking work vehicle in such a state that the lugs project toward the inside of the machine body, thereby reducing the width between the left and right wheels. However, in this case, the looseness of the soil bounced up by the lugs deteriorates, and soil, stones, etc. are brought in and bitten between the mission case and the axle that the wheels are mounted on. Inconvenience may occur.

An object of the present invention is to provide a two-wheeled walk type work vehicle which is excellent in stability during traveling without cropping the inconvenience that the thrust is lowered and the dirt of the soil rebounded up by the lugs deteriorates. It is to provide a wheel for a walk-behind work vehicle that can be used even in a narrow field with a narrow gap or a furrow.

[0007]

In order to achieve the above-mentioned object, in the invention according to claim 1 of the present invention, a rim equipped with a plurality of lugs in a state of protruding toward one lateral outer side is provided. , The boss that is detachably connected to the axle,
With respect to the side end on the side where the lug does not project in the rim, the side end of the boss portion on the same side as the side end,
The lugs are continuously arranged so as to be recessed and displaced in the protruding direction.

According to the first aspect of the present invention, generally, the axle support portion in the mission case of the walk-behind work vehicle is formed to bulge to the left and right sides of the mission case. With respect to the side end on the side that does not project, the boss is walked by connecting the rim to the boss so that the side end of the boss on the same side as the side end is concavely displaced in the protruding direction of the lug. By configuring the wheels for the model work vehicle, the lugs on the rim protrude from the axles that project outward from the left and right sides of the mission case of the two-wheel type walk-type work vehicle. If you install it with the side end on the side not to be positioned on the mission case side, the swelled axle bearing part of the mission case
Since it can be avoided by covering it with the recessed displacement portion of the boss portion with respect to the rim of the wheel, while keeping the protruding length of the lug to a length where sufficient thrust can be obtained, the left and right wheel gap width is It can be made narrow enough to be used in fields with narrow spaces or ridges.

[0009] Further, with respect to each axle, a state in which the side end of the rim on the side where the lug does not project is located on the mission case side, in other words, the lug projects toward the lateral outer side of the machine body. Even if it is attached to the car, the width between the left and right wheels can be narrowed, so that the soil removed by the lugs can be removed smoothly. That is, there is no inconvenience that dirt, stones, or the like is caught between the wheel and the mission case on which the axle is mounted.

Moreover, when traveling on a field or on a road where crops and ridges are sufficiently wide, if the wheels are mounted with the protruding ends of the lugs positioned on the mission case side with respect to the respective axles, Since the width between the wheels can be widened, the stability during traveling can be further improved.

Therefore, a two-wheel type walkable work vehicle having excellent stability during traveling can be provided without inconvenience such as a decrease in thrust and a poor handling of soil rebounded by lugs.
A wheel for a walk-behind work vehicle that can be used even in a narrow field between crops and ridges can be provided.

According to the second aspect of the present invention,
In addition to the invention described in claim 1, the projecting end portion of each lug is set so as not to project laterally outward from the side end portion of the boss portion on the same side as the projecting end portion.

According to the second aspect of the invention, with respect to the side end of the rim on which the lug does not project, the side end of the boss on the same side as the side end is recessed in the lug projecting direction. By connecting the rim to the boss in a state of being inserted and displaced, the protruding length of the lug can be ensured to be a length where sufficient thrust can be obtained, so that the protruding end of each lug is on the same side as the protruding end. By setting the boss so as not to project laterally outward from the side end of the boss, it is possible to prevent the lugs from being formed unnecessarily long. That is, it is possible to reliably maintain the width of the left and right wheels to be narrow enough to be used even in a field between crops or a narrow ridge.

Further, by setting the projecting end of each lug so as not to project laterally outward from the side end of the boss on the same side as the projecting end, for example, root deep-root is cultivated. In such a field where the ridges are narrow and deeply raised, it is possible to easily determine the degree of separation of the protruding end portion of the lug from the ridge side portion based on the sense of distance between the side end portion of the boss portion and the ridge side portion.

Therefore, it has become possible to provide a wheel for a walk-behind work vehicle that enables a two-wheel walk-behind work vehicle to be used in a more suitable state even in a field with a narrow space between crops and ridges.

According to the third aspect of the present invention,
In addition to the invention described in claim 1 or 2, the projecting end portion of each lug is inclined so that the outer peripheral side thereof is displaced toward the root side of each lug.

According to the third aspect of the present invention, it is possible to travel in a narrower ridge while securing the projecting length of the lug to a length that provides sufficient thrust.

Therefore, it has become possible to provide a wheel for a walk-behind work vehicle capable of improving the workability of the two-wheel walk-behind work vehicle.

In the invention according to claim 4 of the present invention,
For each axle protruding outward from both the left and right sides of the mission case, a rim equipped with a plurality of lugs that projects toward the lateral outer side on one side can be attached to and detached from the axle. In the boss portion connected to the side edge portion of the boss, which is on the same side as the side edge portion with respect to the side edge portion of the rim on which the lug does not protrude, is recessed in the protruding direction of the lug. A wheel for a walk-behind work vehicle, which is continuously provided in a state of being inserted and displaced, was mounted so that a side end portion of the rim was located on the mission case side and the lug was exposed toward the outside.

According to the invention described in claim 4, the two-wheeled walk type work vehicle having excellent stability during traveling is provided with poor stability during traveling due to the wheels stepping down on the crops and the wheels climbing up the ridges. Or, it can be used even in a narrow field between crops or ridges with sufficient thrust without causing inconvenience such as damage to the roots of crops extended to the side of the ridge with rugs.

Further, since the wheels are attached to the respective axles so that the side ends of the rim are located on the mission case side and the lugs are exposed to the outside, they are flipped up by the lugs. The soil will be removed smoothly. That is, there is no inconvenience that dirt, stones, or the like is caught between the wheel and the mission case on which the axle is mounted.

Therefore, a walk-type work vehicle having excellent stability during running that can be used even in a narrow field between crops or ridges without causing a disadvantage that the looseness of soil thrown up by the lag and the looseness of the soil caused by lugs deteriorates. Can be provided.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the entire side surface of a walk-behind work vehicle. This walk-behind work vehicle comprises an engine 1 mounted on the front of the machine body, a mission case 2 arranged behind the engine 1, and an engine. A belt-tension-type main clutch 3 that is operated to switch between an on-state and a disengaged state in which the power from 1 is transmitted to the transmission case 2, and each of which is projected from the left and right sides of the lower portion of the transmission case 2 toward the outside. It is composed of a pair of left and right wheels 5 mounted on the axle 4, a steering handle 6 extending rearward from an upper portion of the mission case 2, and the like. A rotary tilling device 7, which is an example of a working device, is connected to the rear part of the vehicle body so that the tilling work between crops and the tilling soil work between furrows can be performed.

Left and right steering clutches (not shown) built in the mission case 2 are provided on the left and right sides of the steering wheel 6.
Is equipped with a steering clutch lever 8 for switching between an on-state for transmitting power to each wheel 5 and a disengaged state for not transmitting power. By operating this steering clutch lever 8, turning traveling can be performed easily. ing.

As shown in FIG. 2, the axle support portions 2A at the lower portion of the mission case 2 on which the axles 4 are provided in a projecting manner,
Since a bearing (not shown) for supporting the transmission is built in, it is formed in a state of bulging to the left and right sides of the mission case 2.

As shown in FIGS. 1 to 3, the wheel 5 has a rim 10 provided with a plurality of lugs 10A in a state of protruding laterally outward on one side, and is removably pinned to the axle 4. The boss 10 connected to the lug 10A of the rim 10
To the side end 10a on the side where the
The side end 11a of the boss 11 on the same side as the a is the lug 1
The spokes 12 are continuously provided in a state of being recessed and displaced in the protruding direction of 0A. Rim 10
Is made of a round steel material, and a plurality of lugs 10 </ b> A protruding in one lateral and lateral direction are formed by sticking a rubber tire A formed in a state in which the plurality of lugs 10 </ b> A project toward one lateral and lateral direction. It is configured to be equipped with 10A.

Then, the wheel 5 thus constructed is
As shown in FIG. 2, the rim 10 is attached to each of the axles 4 protruding outward from the left and right sides of the mission case 2.
If the side end portion 10a on the side where the lug 10A does not project is located on the mission case 2 side, the swelled axle bearing portion 2A of the mission case 2 is attached to the wheel 5
It can be avoided by covering it with the recessed displacement portion of the boss portion 11 with respect to the rim 10.
It is possible to secure the projection length of the lug 10A to a length that can obtain a sufficient thrust force, and also to make the left and right wheel gap width L narrow enough to be used even in a narrow field between crops or ridges. Further, with respect to each axle 4, the wheel 5 is positioned such that the side end 10a of the rim 10 on the side where the lug 10A does not project is located on the mission case 2 side, in other words, the lug 10A faces the lateral outside of the machine body. Since the width L between the left and right wheels can be narrowed even when the wheel 5 is mounted in a projecting state, the looseness of the soil bounced up by the lug 10A also becomes smooth, and the gap between the wheel 5 and the mission case 2 becomes smooth. It is also possible to eliminate the inconvenience of dirt and stones getting caught. Moreover, as shown in FIG. 4, when the vehicle is run on a field or on a road where crops and ridges are wide enough,
If the protruding ends 10b of the lugs 10A are attached to the axles 4 so as to be located on the mission case 2 side, the left and right wheel gap width L can be widened, so that the stability during traveling is further improved. It can also be done.

Therefore, by mounting the wheels 5, the two-wheel type walk type work vehicle having excellent stability during traveling will be inconvenient because the thrust will be reduced and the looseness of the soil rebounded by the lugs will deteriorate. It can also be used in narrow fields between crops and ridges without inviting.

As shown in FIG. 2, the wheel 5 has each lug 10
The projecting end portion 10b of A is set so as not to project laterally outward than the side end portion 11b of the boss portion 11 on the same side as the projecting end portion 10b, whereby each lug 10A.
Is formed to be unnecessarily long, and the width L of the left and right wheels is prevented from becoming a length that cannot be used in a narrow field between crops or ridges. Also, the side end portion 11b of the boss portion 11 in which the protruding end portion 10b of each lug 10A is on the same side as the protruding end portion 10b.
By setting in such a state that it does not project laterally outward more than, for example, in a field where root ridges with narrow ridges and deep ridges are cultivated, which is indicated by a chain double-dashed line in FIG. From the sense of distance between the outer end portion 11b and the ridge side portion, it is possible to easily determine the degree of separation of the protruding end portion 10b of the lug 10A from the ridge side portion.

Therefore, by setting the projecting length of each lug 10A on the wheel 5 as described above, it is possible to use the two-wheel type walkable work vehicle in a more suitable state in a narrow field between crops or ridges. Can be done.

Further, as shown in FIG. 2, the protruding end portion 11b of each lug 10A in the wheel 5 is inclined toward the root side of each lug 10A toward the outer peripheral side thereof. While securing the projecting length of the lug 10A to a length sufficient to obtain thrust, even in the field shown by the solid line in FIG. 2 where the ridges are narrow but the ridges are narrower, the crops that have extended to the side of the ridges. The two-wheeled walk type work vehicle can be driven without any inconvenience such as being damaged by stepping on the root of the vehicle with the wheel 5.
In other words, the two-wheeled walking work vehicle can be made more workable.

[Other Embodiments] Other embodiments of the present invention will be listed below. The length of each lug 10A on the wheel 5 is calculated as follows.
The protruding end portion 10b of A may be set in a state of protruding laterally outward from the side end portion 11b of the boss portion 11 on the same side as the protruding end portion 10b. The protruding end 11b of each lug 10A on the wheel 5 is
It may be in a state of standing upright in the vertical direction, or may be curved so as to be displaced toward the root side of each lug 10A toward the outer peripheral side thereof. The rim 10 may be configured by baking and fixing to a flat steel material, a pipe material, or the like, a rubber tire A formed in a state in which a plurality of lugs 10A project toward one lateral outside. The number and shape of the spokes 12 can be variously changed. The rim 10 and the boss portion 11 may be connected to each other via a disc. The lug 10A may be integrally formed on the rim 10 with the same material as that of the rim 10 to form an iron wheel. Alternatively, the lug 10A may be formed of a metal material or a resin material and attached to the rim 10 by a bolt or a rivet. You may do it.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1] Overall side view of a walk-behind work vehicle

FIG. 2 is a partially cutaway front view showing an example of a configuration of wheels and a mounting state on an axle.

FIG. 3 is a side view showing a configuration of wheels.

FIG. 4 is a front view showing another mounting state of the wheels on the axle.

[Explanation of symbols]

 2 Mission Case 4 Axle 5 Wheel 10 Rim 10A Lug 10a Side End 10b Projecting End 11 Boss 11a Side End 11b Side End

Claims (4)

[Claims] 1. A boss portion (11) to which a rim (10) equipped with a plurality of lugs (10A) in a state of protruding toward one lateral side outward is detachably connected to an axle (4). )
In addition, with respect to the side end (10a) of the rim (10) on the side where the lug (10A) does not project, the side end (1)
0a) on the same side as the side end (1) of the boss (11).
1a) is a wheel for a walk-behind work vehicle, which is continuously provided so as to be recessed and displaced in the protruding direction of the lug (10A). 2. A protruding end (10) of each lug (10A).
The walking type according to claim 1, wherein b) is set so as not to project laterally outward from a side end portion (11b) of the boss portion (11) on the same side as the protruding end portion (10b). Wheels for work vehicles. 3. A protruding end (10) of each lug (10A).
The wheel for a walk-behind work vehicle according to claim 1 or 2, wherein b) is inclined so that the outer peripheral side thereof is displaced toward the root side of each of the lugs (10A). 4. A plurality of lugs (1) are provided so as to project laterally outward on one side with respect to each axle (4) projecting outward from both left and right sides of the mission case (2).
The rim (10) equipped with 0A) is attached to the boss (11) that is detachably connected to the axle (4), on the side where the lug (10A) of the rim (10) does not project. With respect to the end portion (10a), the side end portion (11a) of the boss portion (11) on the same side as the side end portion (10a) is
A wheel (5) for a walk-behind work vehicle, which is continuously provided in a state of being recessed and displaced in the protruding direction of the lug (10A), has a side end portion (of the rim (10) on the mission case (2) side. 10a) is positioned so that the lug (10A) is mounted to expose the lug (10A) toward the outside.