JP5342789B2 - Driving front wheel for walking type agricultural machine - Google Patents

Description

  The present invention relates to a driving front wheel for a walk-type farm work machine that has front and rear wheels and is capable of driving at least a front wheel and capable of running on a rear wheel with the front wheel lifted.

  Some farm machines perform work while running on a muddy field, a remote field, or an inclined land. As an example, there is a self-propelled two-sided mower for simultaneously mowing the top and side surfaces of a remote area as shown in Patent Document 1 below. This self-propelled two-sided mower has a traveling part having a drive wheel, a main cutter housing having a main cutter that rotates horizontally, and a sub-cutter that can rotate on a plane that intersects the plane in the direction of rotation of the main cutter. A secondary cutter housing, the side of the secondary cutter housing is pivotally supported on the side of the primary cutter housing, and the secondary cutter housing can swing up and down relative to the primary cutter housing. Doing grass cutting work simultaneously on two sides of the flat ground and the sloping ground by placing the main cutter housing along the flat ground and the secondary cutter housing along the sloping ground in a place like a ridge where the sloping ground extends in one direction. It is something that can be done.

Not only this self-propelled two-sided mower, but also farming machines that are forced to work on muddy land and sloping land, there are a transporting work machine, a management work machine, a harvesting work machine, a sowing or transplanting work machine, and the like.
JP 2006-7990 A

  In such a farming machine, a traveling wheel that can stably travel on muddy ground, can maintain straightness during work, and can prevent slippage against a lateral load on an inclined land is required. . In addition, in the case of walking-type agricultural machines, when riding over a groove or ridge, turning, etc., the front wheels are often lifted to run the rear wheels, but in order to improve the workability at this time It is desirable to make the front wheels as light as possible.

  In addition, the mud state of fields and straws often varies depending on the region and the time of work (season), so it is preferable that wheels suitable for the ground conditions can be supplied at low cost, and when the wheels are damaged, etc. It is preferable that the maintenance is excellent.

  And when working on muddy ground or sloping ground, it is better to pull the working part of the farm work machine with the front wheels, so that better driving workability can be obtained. There is a need for a wheel that satisfies the above conditions.

  This invention makes it a subject to cope with such a situation. In other words, it is possible to travel stably on muddy ground, maintain straightness during work, and prevent slippage against lateral loads on slopes, which is suitable for various ground conditions. It is an object of the present invention to provide a walking front drive wheel for a farm machine that can provide wheels at low cost and is excellent in maintainability.

In order to achieve such an object, the driving front wheel for walking type agricultural working machine according to the present invention has at least the following characteristics.
A front wheel for a walk-type agricultural machine that can drive at least the front wheel and that can run on the rear wheel with the front wheel lifted, and has a plate-like body having a circular outer edge and a grounding wider than the thickness of the plate-like body And a drive resistor formed in an annular shape having an uneven running resistance portion on the outer periphery, and an outer edge portion of the plate-like body is exposed at least in a concave portion of the uneven running resistance portion. As described above, the driving resistor is detachably attached to the side surface of the plate-like body, and the driving resistor has a thin portion for each of the concavo-convex shapes of the running resistance portion, and a fastener is provided in the thin portion. An insertion hole for insertion is formed, and a mounting hole corresponding to the insertion hole is formed in the plate-like body, and a fastener is passed through the insertion hole and the mounting hole to form a plate-like body. walk-agricultural machine before driving, characterized in that wearing the drive resistor .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 is explanatory drawing for demonstrating the front wheel for walking type farm working machines which concerns on one Embodiment of this invention, Comprising: Fig.1 (a) is a side view, FIG.1 (b) is a front view. 2 is a cross-sectional view taken along the line AA ′ in FIG.

  A front wheel (a driving front wheel for walking type agricultural machine, hereinafter simply referred to as a front wheel) 1 includes a plate-like body 2 and a driving resistor 3. The plate-like body 2 has a circular outer edge (including a substantially circular or elliptical shape) and includes a spike 2S on the outer edge as necessary. The driving resistor 3 is formed in an annular shape in a side view, has a ground contact width t3 (or t3 × 2) wider than the thickness t2 of the plate-like body 2, and has an uneven running resistance portion 3a on the outer periphery. ing. Further, the drive resistor portion 3 is mounted on the plate-like body 2 so that the outer edge portion of the plate-like body 2 is exposed at least in the concave portion 3a1 of the uneven running resistance portion 3a.

  In the front wheel 1, a driving resistor 3 is detachably attached to a side surface of the plate-like body 2. The attachment / detachment means may be any means, but in the illustrated example, a fastener (bolt nut) 4 is passed through the hole formed in the plate-like body 2 and the hole formed in the drive resistor 3. The drive resistor 3 is mounted on the plate-like body 2. In the illustrated example, the left and right symmetrical drive resistors 3 are mounted on both side surfaces of the plate-like body 2, but not limited to this, the running resistance is not uniform left and right like a self-propelled two-sided mower. If the work equipment or work equipment that often travels along a contour line on an inclined ground, etc., where deflection due to lateral load is normal, the grounding width on the deflection side is widened to give directivity to the driving force itself. In addition, it may be mounted only on one side of the side surface.

  In the front wheel 1 according to such an embodiment, the outer edge portion of the plate-like body 2 is exposed to the outer periphery of the drive resistor 3, so that the plate-like body 2 having a thickness t2 of about several millimeters is on the ground. Since it will run in the state where it stabbed, even when a lateral load is applied to the walking type farming machine when working on an inclined land, the plate-like body 2 stuck in the ground becomes the resistance of the lateral load, It becomes possible to prevent a side slip. In addition, since the plate-like body 2 stuck in the ground serves as a guide for straight running, it is possible to maintain straight running performance during work. The arrow in FIG. 1 is the forward direction of the walking farm machine.

  In addition, since the driving resistor 3 having a wide contact width and an uneven running resistance portion on the outer periphery is provided, the amount of subsidence of the front wheel 1 on the soft ground can be regulated to some extent, and driving can be performed. The desired traction force can be generated by the front wheel 1 that performs this. As a result, stable running performance can be obtained even in muddy fields and remote areas.

  Since the plate-like body 2 and the drive resistor 3 are separate members, for example, the plate-like body 2 can be made of steel, and the drive resistor 3 can be made into a lightweight and high-strength resin molded body. This makes it possible to reduce the weight of the front wheel 1 having sufficient strength. If the front wheel 1 is reduced in weight, the operation of lifting the front wheel 1 which is an operation peculiar to the walking farm machine and traveling on the rear wheel can be easily performed, and the work strength can be reduced. Furthermore, when the drive resistor 3 is a resin molded body, various forms or sizes can be formed at low cost. A fiber reinforced resin or the like can be used as the light and high strength resin.

  Further, since the plate-like body 2 and the drive resistor 3 are made detachable, the drive resistor 3 having a different grounding width can be selected and mounted for various ground conditions, and the front wheel Compared with the case where the whole 1 is manufactured according to different ground conditions, a product having a desired function can be provided at a low cost. In addition, when the ground condition varies from season to season, the form of the driving resistor 3 is exchanged, so that it is possible to cope with a lower cost than when the entire front wheel 1 is replaced. Furthermore, in order to be able to replace the entire front wheel 1, a complicated wheel exchange mechanism is required, but the drive resistor 3 can be exchanged by tightening and loosening the fastener, so a complicated wheel exchange mechanism is adopted. Therefore, it is possible to reduce the cost of the agricultural machine.

  Further, specific features in the embodiment of the present invention will be described. The driving resistor 3 has a thin portion 3b for each uneven shape of the running resistance portion 3a, and the insertion for inserting the fastener 4 into the thin portion 3b. A hole is formed, and a mounting hole corresponding to the insertion hole is formed in the plate-like body 2, and the fastener 4 is passed through the insertion hole and the mounting hole, and the drive resistor 3 is attached to the plate-like body 2. doing.

  According to this, it becomes possible to further reduce the weight of the drive resistor 3 by providing the thin portion 3b. By providing the thin portion 3b for each uneven shape of the running resistance portion 3a, it is possible to form the thin portion 3b with axial symmetry and in a balanced manner, and to effectively form the thin portion 3b at a plurality of locations. As a result, the running stability of the front wheel 1 can be improved, and further the labor can be further reduced when the front wheel is lifted and the rear wheel is running. Moreover, since the insertion hole for the fastener 4 is formed in the thin part 3b, the length of the fastener 4 can be set short, and the increase in the weight added by the fastener 4 which needs to attach multiple pieces is minimized. To the limit. Furthermore, since the head of the fastener 4 is hidden in the depression of the thin portion 3b, the fastener 4 is not loosened due to resistance received from the soil during traveling.

  Further, specific features in the embodiment of the present invention will be described. The plate-like body 2 is formed with a hollow hole 2a in the ring of the driving resistor 3, and a predetermined arc portion S1 is formed on the outer edge thereof. The remaining spike portion 2S having a near waveform is formed, and the concave portion S2 of the spike portion 2S is formed corresponding to the concave portion 3a1 of the running resistance portion 3a.

  According to such a feature, by providing the spike portion 2S at the outer edge portion of the plate-like body 2, it is possible to increase the biting of the plate-like body 2 into the ground, obtain a stable straight traveling property, Ensuring the amount of biting can exhibit a sufficient skid prevention effect. Moreover, since the shape of the spike part 2S is made to approach the ground with respect to the front wheel 1 to be driven, the front wheel 1 that is the driving wheel can effectively exert traction force.

  Further, since the predetermined circular arc portion S1 is left at the outer edge of the plate-like body 2, when traveling on a paved road surface or a hard road surface, smooth rotation can be maintained, and the plate-like body 2 formed of a steel plate. The wear on the outer periphery can be minimized. In addition, regarding the spike part 2S, when sufficient traction force is obtained with the running resistance part 3a of the drive resistor 3, this is not particularly provided, and the outer edge part of the plate-like body 2 may be circular.

  In addition, when the lateral load is small, the pitch between the peripheral tip portions can be shortened and smooth rotation can be maintained even by aligning the outer diameter of the running resistance portion 3a with the tip diameter of the spike portion 2S, so that straightness can be maintained. The plate-like body 2 is within a predetermined range in which the outer edge portion of the plate-like body 2 is exposed in the concave portion 3a1 formed between the uneven running resistance portions 3a in a side view. It is also possible to mount a drive resistor 3 having a larger diameter.

  FIG. 3 is an explanatory view showing a front wheel for a walking type farm working machine according to another embodiment of the present invention (the same reference numerals are given to the same portions as those of the above-described embodiment, and duplicated explanation is omitted). (A) is a whole perspective view, (b) is a partial sectional view). In this embodiment, the drive resistor 3 is a combined body of divided blocks 3P.

  Each divided block 3P is formed for each convex shape of the running resistance portion 3a. A thin portion 3b is formed in each divided block 3P, and a fastener insertion hole 3c is formed in each thin portion 3b. . Each divided block 3P is provided with engaging portions 3P1 and 3P2 that engage with adjacent left and right divided blocks 3P. A mounting hole 2 b is formed in the plate-like body 2. Each divided block 3P can be individually attached to and detached from the plate-like body 2, and the adjacent left and right divided blocks 3P are engaged with each other by the engaging portions 3P1 and 3P2, thereby facilitating positioning during mounting. Each divided block 3P is securely fixed. Here, the divided block 3P is formed for each convex shape of the running resistance portion 3a. However, the divided block 3P is not limited thereto, and can be divided for each continuous concave and convex shape including a plurality of convex shapes.

  According to such an embodiment, by making the driving resistor 3 a combination of the divided blocks 3P, if the driving resistor 3 is partially damaged, it can be dealt with by replacing the individual divided blocks 3P. This makes it possible to easily perform maintenance at a low cost at a low cost. Further, the drive resistor 3 configured as a combined body of the divided blocks 3P can be easily attached and detached without removing the front wheel 1 from the axle, so that maintenance at the time of rearrangement is further improved.

  FIG. 3B is a partial cross-sectional view showing a structure for attaching the divided block 3P to the plate-like body 2. As shown in FIG. The divided block 3P of the drive resistor 3 is mounted so as to sandwich the plate body 2 from both the left and right sides of the plate body 2, and the mounting hole 2b of the plate body 2 is mounted on one of the mounting surfaces of the opposing drive resistor 3. A convex portion 3d that fits into the convex portion 3d is formed, a concave portion 3e into which the convex portion 3d is fitted is formed on the other side, and an insertion hole 3c for inserting the fastener 4 is formed in the convex portion 3d and the concave portion 3e. Here, although shown as an attachment structure for each convex shape, as described above, it may be adopted as an attachment structure in the case of being divided into continuous uneven shapes including a plurality of convex shapes. A similar structure can also be employed for the mounting structure of the integral drive resistor 3 shown in FIGS.

  By adopting such a structure, the integrity of the driving resistor 3 and the plate-like body 2 facing left and right can be strengthened, and the driving force transmitted from the plate-like body 2 to the driving resistor 3 can be reliably ensured. can do. Further, positioning when the driving resistor 3 or the divided block 3P is mounted can be easily performed.

  And the convex part 3d and the recessed part 3e are formed for every uneven | corrugated shape of the driving | running | working resistance part 3a, and the convex part 3d and the recessed part 3e can be formed side by side alternately on either one of the right and left drive resistors 3. In other words, next to the place where the right convex portion 3d and the left concave portion 3e are fitted, the concave portion 3e is formed on the right side, and the convex portion 3d is formed on the left side so that they are fitted. Yes. By doing in this way, the left and right weight balance can be equalized, and the traveling balance of the front wheels 1 can be kept good.

  Moreover, in the above-mentioned example, although the convex part 3d and the recessed part 3e are fitted, when the thickness of the plate-shaped body 2 is thick, the structure which fits a convex part from both right and left to the mounting hole 2b is employ | adopted. You can also.

  FIG. 4 is an explanatory view showing a usage state of the front wheels for walking type agricultural machine according to the embodiment of the present invention. In the illustrated example, a self-propelled two-sided mower is shown as a walking type farm working machine. The figure (a) is a top view, and the figure (b) is a rear view.

  The self-propelled two-sided mower 100 includes a traveling unit having the front wheel 1 and the rear wheel 11 as described above, and is mounted on the body 10 having a handle 12 for walking operation at the rear, and the front wheel 1. And a main cutter portion 20 having a main cutter 21 that is driven to rotate horizontally between the rear wheel 11 and a surface that is pivotally supported to the side of the machine body 10 or the main cutter portion 20 and that is inclined with respect to the rotation surface of the main cutter 31. A sub-cutter unit 30 having a sub-cutter 31 that can be rotationally driven, a plurality of or a single prime mover 40 (41, 42) for driving the traveling unit, the main cutter unit 20 and the sub-cutter unit 30; A power transmission mechanism 13 that transmits power from one to the front wheel 1 and the rear wheel 11 at a constant axial speed ratio is provided.

  The prime mover 40 includes an electric motor 41 and an engine 42, and one (for example, the electric motor 41) drives the traveling unit, and the other (for example, the engine 42) drives the main cutter unit 20 and the sub cutter unit 30. It is like that. In order to drive the main cutter unit 20 and the sub cutter unit 30 by the engine 42, the power transmission mechanism unit 14 is provided.

  The steering wheel 12 is provided with various operation units. When the traveling unit 11 is driven by the electric motor 41, a forward / reverse / stop switching switch and a speed adjustment lever are provided. When driving 20, 30, a clutch lever and a throttle adjusting lever are provided. The handle 12 is also provided with a lever for adjusting the tilt angle of the sub cutter unit 30.

  Such a self-propelled two-sided mower 100 can simultaneously perform mowing work on two surfaces, a flat land and an inclined land. For example, when performing mowing work in a remote area, the upper flat ground is cut by the main cutter unit 20, and the side inclined land is cut by the auxiliary cutter unit 30. The sub cutter unit 30 is pivotally supported on the main cutter unit 20 by a hinge 22, for example, and can be operated at a predetermined angle along an inclined ground by a ground ring 32. Of course, the sub cutter part 30 can be used not only for working on an inclined land but also for leveling the mowing work width on a flat ground in the same manner as the main cutter part 20. The auxiliary cutter unit 30 can proceed with work along the inclined ground by the ground ring 32.

  When the front wheel 1 as described above is employed in such a self-propelled two-sided mower 100, even when the auxiliary cutter unit 30 is operated along an inclined ground, the skid prevention function and the straightness maintaining function of the front wheel 1 Mowing work can be carried out while maintaining straightness safely. In addition, the front wheel 1 can be driven to perform stable running without slipping even in a muddy place.

  When the situation of the kite is different, it is possible to obtain good running performance corresponding to the situation of the kite by appropriately adopting the drive resistor 3 having a different grounding width. When the drive resistor 3 is damaged when a stone or the like that the main cutter 21 has bounced off hits the drive resistor 3, the drive resistor 3 can be easily removed from the plate-like body 2 and replaced with a new one. When the embodiment shown in FIG. 3 is adopted, it is possible to deal with partial damage at low cost and easily by exchanging the divided block 3P.

  By adopting the weight-reduced front wheel 1, the operation of lifting the front wheel 1 and running the rear wheel can be easily performed. As a result, it is possible to perform overriding, dredging passage, turning, turning, and the like with good workability by running the rear wheel with the front wheel 1 lifted.

  In FIG. 4, a walking type self-propelled two-sided mower is shown as an example. However, the embodiment of the present invention is not limited to this, and at least front wheel driving is possible and rear wheel traveling with a front wheel lifted is possible. It can be effectively applied to all walking type agricultural machines. According to such an embodiment of the present invention, it is possible to stably travel on a muddy ground, maintain straightness during work, and further prevent slippage against a lateral load on an inclined ground. Further, it is possible to provide a wheel suitable for various situations on the ground at a low cost, and to provide a driving front wheel for a walking type agricultural machine with excellent maintainability.

  The embodiment of the present invention is effective for the front wheels driven by the walking type agricultural working machine, but the driving state is not limited to the constant driving, and the driving is performed part-time when the one-way clutch is interposed in the hub of the driving shaft. It is also effective when In addition, the above-described embodiment of the present invention has no problem even if it is used as it is for the idle wheel of a walking type farm work machine that does not have a front wheel drive mechanism as it is.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing (the figure (a) is a side view, the figure (b) is a front view) for demonstrating the front wheel for walk type agricultural working machines which concerns on one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing (A-A 'sectional drawing) for demonstrating the front wheel for walking type agricultural working machines which concerns on one Embodiment of this invention. It is explanatory drawing which showed the front wheel for walk type farm machines based on other embodiment of this invention (the figure (a) is a whole perspective view, the figure (b) is a fragmentary sectional view). BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing (the figure (a) is a top view, the figure (b) is a rear view) which showed the use condition of the front wheel for walk type farm working machines which concerns on embodiment of this invention.

Explanation of symbols

1: front wheel, 2: plate-like body, 3: driving resistor,
2a: lightening hole, 2b: mounting hole, 2S: spike part,
S1: Arc part, S2: Concave part,
3a: running resistance part, 3a1: concave part,
3b: thin wall portion, 3c: insertion hole, 3d: convex portion, 3e: concave portion,
3P: divided block,
4: Fastener,
100: Self-propelled double mower

Claims (6)

A driving front wheel (1) for a walking agricultural machine capable of driving at least a front wheel and capable of running on a rear wheel with the front wheel lifted,
A plate-like body (2) having a circular outer edge portion;
A drive resistor (3) formed in an annular shape having a ground contact width wider than the thickness of the plate-like body (2) and having an uneven running resistance portion (3a) on the outer periphery;
The driving resistor (3) of the plate-like body (2) is exposed so that the outer edge of the plate-like body (2) is at least exposed at the concave portion (3a1) of the uneven running resistance portion (3a). It is detachably attached to the side ,
The drive resistor (3) has a thin portion (3b) for each concave and convex shape of the running resistance portion (3a), and an insertion hole (3c) for inserting a fastener (4) into the thin portion (3b). ) And a mounting hole (2b) corresponding to the insertion hole (3c) is formed in the plate-like body (2), and fastened to the insertion hole (3c) and the mounting hole (2b). A driving front wheel for a walking type farm working machine , wherein a tool (4) is passed through and the driving resistor (3) is mounted on the plate-like body (2) . The plate-like body (2) is made of steel,
2. The driving front wheel for a walking type agricultural machine according to claim 1, wherein the driving resistor (3) is a lightweight, high-strength resin molded body. The said driving resistor (3) is a coupling | bonding body of a division | segmentation block (3P), The driving front wheel for walking type farming machines of Claim 1 or 2 characterized by the above-mentioned. The driving resistor (3) is mounted so as to sandwich the plate-like body (2) from both the left and right sides of the plate-like body (2), and on one of the mounting surfaces of the opposing driving resistor (3), A convex portion (3d) that fits into the mounting hole (2b) of the plate-like body (2) is formed, and a concave portion (3e) that fits the convex portion (3d) is formed on the other side, and the convex portion ( The driving front wheel for a walking type farm work machine according to any one of claims 1 to 3, wherein an insertion hole for inserting the fastener (4) is formed in 3d) and the recess (3e) . The convex portion (3d) and the concave portion (3e) are formed for each concave and convex shape of the running resistance portion (3a), and one of the left and right driving resistors (3) is connected to the convex portion (3d) and the convex portion (3d). The driving front wheel for a walking type agricultural machine according to claim 4 , wherein the recesses (3e) are formed alternately . In the plate-like body (2), a hollow portion (2a) is formed in the ring of the driving resistor (3), and a spiking portion (2S) with a predetermined waveform leaving a predetermined arc portion on the outer edge thereof. 2), and the concave portion (S2) of the spike portion (2S) is formed corresponding to the concave portion (3a1) of the running resistance portion (3a). The driving front wheel for walking type agricultural working machine described in any one of 5 .

Images