JP2010263857A - Riding furrow opener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding furrow opener which can, if necessary, escape a furrow-opening portion upward without deforming or breaking the furrow-opening portion, even when the riding furrow opener turns around with the furrow-opening portion in a contact with a field. <P>SOLUTION: In this steerable and turnable self-propelled riding furrow opener whose furrow-opening portion 7 for forming a furrow 6 on the field 5 is disposed in a riding travel portion 4 in which a driving wheel is disposed in a riding portion 3 having a handle 12 to be steered, the furrow-opening portion 7 is laterally swingably disposed in an upward escapable state. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a riding grooving machine for forming a groove for improving drainage in a field such as a rice field or a field.

  For example, in rice cultivation, when seedlings have grown to a certain extent, in order to improve the growth of the seedlings, a ditch is formed in the paddy field to improve drainage, and the paddy field is once dried (so-called dry drying). .

  Conventionally, as a working machine for forming a groove in a field, an engine-driven drive wheel is provided on the front end side of the frame, a groove cutting portion is provided on the base end side of the frame, and a saddle is provided on the frame. In addition, a riding-type grooving machine in which a handle is provided on the front side of the saddle has been proposed (see Patent Document 1).

  And according to this patent document 1, since it can be operated with a riding posture that has a handle and straddles a saddle, the labor at the time of work is reduced, and the groove portion on the base end side bites into the ground so that the groove is smoothly formed. So it was very practical.

JP 2006-176119 A

  By the way, the riding type grooving machine as described in Patent Document 1 is provided with a grooving portion in a fixed state on the base end side of the frame. Specifically, the grooving part is fixed to the base end side of the frame so that the grooving machine has a direction suitable for forming the groove while going straight.

  For this reason, for example, when the grooving machine is in a U-turn and the grooving part is in contact with the field, this grooving part will face the same direction as the grooving machine. Since it is arranged at an angle, the side of this grooving part, which is the outside in the turning direction of the grooving machine, will receive a very large earth pressure or mud pressure, which may cause the grooving part to deform in some cases Or the fixing part between the groove and the frame will be damaged.

  Therefore, in order to prevent deformation and breakage of the grooving part, when the grooving machine is U-turned or swiveled, the worker is carrying out a heavy labor to lift the grooving machine and change the direction. It was.

  The present invention pays attention to the problems of such a conventional riding type grooving machine and intends to solve the problem. The grooving part is deformed even if it makes a U-turn while the grooving part is in contact with the field. It is an object of the present invention to provide an epoch-making riding grooving machine that can be evacuated or damaged without being damaged, and that the grooving part can be retracted upward as needed.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A self-propelled riding grooving machine capable of steering turning provided with a grooving section 7 for forming a groove 6 in a field 5 in a riding traveling section 4 provided with driving wheels in a riding section 3 provided with a steering handle section 12. And the grooving part 7 provided so as to be able to be lifted and retracted is provided so as to be swingable left and right.

  2. The riding grooving machine according to claim 1, further comprising a central holding urging portion 20 for urging the grooving portion 7 swinging left and right back to the center.

  Further, an attachment portion 21 connected to the base end portion of the groove cutting portion 7 is provided at the lower portion of the riding traveling portion 4 so as to be rotatable left and right, and the center holding biasing portion 20 is provided on the attachment portion 21, 3. A configuration in which when the groove cutting portion 7 swings left and right via the mounting portion 21, the central holding biasing portion 20 is stretched so as to generate a return bias toward the center. This relates to the described riding grooving machine.

  Further, a base end portion of the groove cutting portion 7 is provided outside the attachment portion 21 provided at the lower portion of the riding traveling portion 4 so as to be rotatable left and right, and one end portion is fixed inside the attachment portion 21. When the other end portion of the tensile spring 20A serving as the central holding biasing portion 20 is connected and the groove portion 7 swings left and right via the mounting portion 21, it may swing to either side. 4. The riding grooving machine according to claim 3, wherein the center holding urging portion 20 is stretched to cause a return urging to the center. 5.

  In addition, the riding travel unit 4 is provided with a lifting shaft 22 for raising and lowering the grooved portion 7, and the grooved portion 7 is provided on the lifting rotary shaft 22 so as to be swingable to the left and right. It concerns on the riding grooving machine of any one of Claims 1-4 characterized by the above-mentioned.

  Further, a front wheel 1 to be steered is provided at the front portion of the riding portion 3, and a rear wheel 2 that is rotationally driven by a driving device 8 is provided at the rear portion. The rear wheel 2 includes at least a right rear wheel 2R and a left rear wheel 2L. The riding portion 3 is provided with a handle portion 12, a saddle portion 13, and a footrest portion 14 for steering the front wheel 1 in the riding portion 3, and is a self-propelled type capable of steering turning in a three-wheel configuration. 6. The riding grooving machine according to any one of claims 1 to 5, wherein the riding running unit 4 is configured.

  Since the present invention is configured as described above, there is no need for heavy labor for the worker (passenger) to lift the grooving machine and change the direction, and U-turn traveling or turning traveling while the grooving part is in contact with the field. Even so, it becomes a riding grooving machine with excellent handling characteristics that does not cause deformation and breakage of the grooving part, and the grooving part is configured to be freely raised and retracted. Innovative riding grooving that has excellent practicality, for example, by moving the section away from the field, or by lifting and retracting so that the grooving part does not touch the step when entering and leaving the farm road and field It becomes a machine.

  Further, in the invention described in claim 2, since the groove cutting portion is biased and held in the center, the groove meanders even during straight traveling and when moving from U-turn traveling or turning traveling to straight traveling. It is difficult to form a desired groove, and it is not necessary to return the grooved portion to the center position each time it is intended to contact the field, so that it is easy to handle and the grooved portion is being lifted and retracted. However, since this grooving portion is biased and held in the center, it is less likely to get in the way.

  Further, in the inventions according to claims 3 and 4, the structure in which the grooved portion that swings to the left and right is urged back to the center by the central holding urging portion can be easily designed and realized, and is more practical. It becomes a riding grooving machine of composition.

  Further, in the invention according to claim 5, it is possible to easily realize a configuration in which the grooved portion can be lifted and retracted with respect to the riding traveling portion and can be swung left and right. It becomes a riding grooving machine.

  In the invention according to claim 6, even if the operator does not balance by putting both feet on the field, the riding traveling unit is stably grounded to the field with a three-wheel configuration, so that the driving device stably travels the field ( (Self-propelled) is possible, and the right rear wheel and left rear wheel are configured to drive, so that it is difficult to slip and can exhibit excellent running performance in the field. Since you can ride in a riding posture like riding a motorcycle, you can ride in an easy posture and you will not get tired of your feet, and it will be very easy to operate as if you are riding a bicycle or motorcycle, etc. It becomes a riding grooving machine with an excellent configuration.

It is a perspective view which shows a present Example. It is a perspective view from another angle which shows a present Example. It is a side view which shows a present Example. It is a description perspective view which shows the drive mechanism of a present Example, and the transmission mechanism of a rotational drive shaft. It is a partial expansion disassembled perspective view which shows the drive and free switching mechanism of a present Example. It is the partial expansion perspective view which decomposed | disassembled the locking pin which shows the drive and free switching mechanism of a present Example. It is a side view which shows the drive and free switching mechanism and right rear wheel of a present Example. It is a disassembled perspective view which shows the right rear wheel of a present Example. It is a partial expanded side view which shows the wheel (front wheel, rear wheel) of a present Example. It is a partial expansion perspective view which shows the wheel (front wheel, rear wheel) of a present Example. It is a partial expanded front sectional view of a wheel (front wheel, rear wheel) of this example. It is a partial expansion explanatory perspective view which shows the raising / lowering mechanism of the groove part of a present Example, and a left-right rocking | fluctuation structure. FIG. 3 is a partially enlarged exploded perspective view showing a shaft attachment structure of a lifting rotary shaft to a riding traveling portion (mounting mount) and a mounting structure of a mounting portion (grooving portion) to the lifting rotary shaft according to the present embodiment. is there. It is a partial expansion explanatory side view which shows the use condition at the time of the groove cutting of the groove cutting part of a present Example. It is a partial expansion explanatory side view which shows the raising retreat state of the groove part of a present Example. It is a partial expansion explanatory top view which shows the left-right rocking | fluctuation structure of the groove part of a present Example. It is a partial expansion explanatory top view which shows a mode that a groove cutting part rock | fluctuates at the time of use of a present Example at the time of turning driving | running | working.

  Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  When an operator rides (boards) the riding part 3, steers the handle part 12 and causes the riding traveling part 4 to travel on the field 5 by the drive wheels, the grooving part 7 provided on the riding traveling part 4 moves to the field 5. A groove 6 can be formed.

  In addition, the handle portion 12 can be steered by an operator so that the riding traveling portion 4 can make a U-turn travel or a turning motion. Grooves 6 are formed in the field 5 while swinging in a direction to avoid pressure or mud pressure.

  That is, with respect to the riding traveling section 4 that performs U-turn traveling or turning traveling, the groove cutting section 7 swings in the same direction as the turning direction of the riding traveling section 4 so as to avoid earth pressure or mud pressure from the farm field 5. (For example, when the riding section 4 turns right, the groove section 7 also swings to the right), and the earth pressure or mud pressure received by the groove section 7 by this swing is substantially the same as that during straight traveling. As a result, the groove 7 does not deform or break.

  Accordingly, it is not necessary to perform a heavy labor for the operator to lift the grooving machine and change the direction, and even if the grooving part 7 is in contact with the field 5, it can be used for U-turn or turning without any problem. It becomes a riding grooving machine.

  Further, the grooving portion 7 of the present invention that can be lifted and retracted can be lifted and retracted away from the field 5 where the groove 6 is not desired to be formed.

  Further, when the riding travel unit 4 enters the farm field 5 such as paddy from a farm road such as paddy, or when leaving the riding travel unit 4 from the farm field 5 to the farm road, the level difference between the farm road and the farm field 5 is reversed. It is also possible to lift and retract the groove 7 so that the groove 7 does not come into contact with the groove 7.

  Further, for example, if a central holding biasing portion 20 for biasing the groove cutting portion 7 swinging left and right to the center is provided, the groove cutting portion 7 is biased and held in the center during straight traveling, and U Even when shifting from turn traveling or turning traveling to straight traveling, the central holding biasing portion 20 promptly urges the groove cutting portion 7 back to the central position, which is a straight traveling groove cutting mode. It is difficult to meander the groove 6 to be formed, and it is possible to reliably form the desired groove 6. Further, it is not necessary to return the groove cutting part 7 to the central position every time it is intended to contact the field 5. Furthermore, even when the grooved portion 7 is lifted and retracted, the grooved portion 7 is easily held by the central holding / biasing portion 20 so that it is not easily disturbed. Become.

  Further, for example, a front wheel 1 to be steered is provided at the front portion of the riding portion 3, and a rear wheel 2 that is rotationally driven by a driving device 8 is provided at the rear portion. The rear wheel 2 includes at least a right rear wheel 2R and a left rear wheel. 2L, and the riding part 3 is provided with a handle part 12, a saddle part 13, and a footrest part 14 for steering the front wheel 1, and a three-wheel steering capable of self-propelled. The rider travel unit 4 can be brought into the field 5 with the three-wheel configuration of the front wheel 1 and the left and right rear wheels 2R and 2L, even if the operator puts both feet on the field 5 and does not balance the rider. Since the grounding is stable, the driving device 8 enables the field 5 to travel stably (self-propelled), and the right rear wheel 2R and the left rear wheel 2L are driven. The saddle part 13 can be used with the operator straddling the riding part 3. You can ride with a riding posture with your feet on the footrest 14 and your hand on the handle 12, so you can ride with a comfortable posture, your feet will not get tired, and you will feel like riding a bicycle or motorcycle etc. The groove 6 can be formed at a desired position on the field 5 by simply performing an operation such as steering of the handle portion 12.

  Specific embodiments of the present invention will be described with reference to the drawings.

  The riding grooving machine of the present embodiment is provided with a front wheel 1 at the front part of the riding part 3 provided with a handle part 12 for steering the front wheel 1, a saddle part 13 and a footrest part 14, and a driving device 8 at the rear part. A rear wheel 2 composed of two wheels, the right rear wheel 2R and the left rear wheel 2L, which are rotationally driven by the vehicle, is provided to form a steerable three-wheeled self-propelled riding traveling unit 4, and the riding traveling unit 4 includes A groove cutting portion 7 for forming a groove 6 is provided in the field 5.

  Specifically, as shown in FIGS. 1 to 3, the riding portion 3 rotates the handle portion 12 adopting a bar type at the front portion of a frame 28 that is deformed in a side view in a substantially horizontal direction. The saddle portion 13 is pivotally attached, and a cushion is provided on the rear side of the upper portion of the frame 28. The rod-like footrest portion 14 is attached to the left and right side surfaces in the middle of the lower portion of the frame 28. Is mounted in a projecting state, and the riding section 4 is configured so that the operator (passenger) can reliably and stably travel on both the field 5 and the road without attaching a balance to the field 5 with a three-wheel configuration. In addition, it is configured so that an operator can ride in a riding posture such as riding a bicycle or a motorcycle over the riding portion 3.

  In addition, a fork 29 is connected to the lower portion of the handle portion 12, the front wheel 1 is supported on the fork 29, and the front wheel 1 can be steered by rotating the handle portion 12. Thus, a basket 39 is attached in front of the frame 28.

  Further, a prime mover 8 as the driving device 8 is provided at the rear portion of the frame 28, and a rotary drive shaft 9 that is rotationally driven by the driving device 8 is provided below the driving device 8. A horizontal axis is provided at the rear of the frame 28 and below the drive device 8 so as to face the right and left directions orthogonal to the direction, and the right rear is provided at one end (right end) of the rotary drive shaft 9. The wheel 2R is connected, the left rear wheel 2L is connected to the other end (left end), and the right rear wheel 2R and the left rear wheel 2L are rotationally driven by the drive device 8 via the rotational drive shaft 9. It is configured to do.

  More specifically, a mounting mount 50 is attached to the rear portion of the frame 28, the drive device 8 is provided above the mounting mount 50, and a bearing cylinder 48 is disposed in the horizontal outer direction on the left and right portions below the mounting mount 50. The rotary drive shaft 9 is inserted into and supported by the left and right bearing cylinders 48, and both end portions of the rotary drive shaft 9 protruding outward from the shaft support cylinder 48 are used as rear wheel connecting portions 15. The right rear wheel 2R and the left rear wheel 2L are connected to the rear wheel connecting portion 15.

  As shown in FIG. 4, the rotational drive structure of the rotational drive shaft 9 by the drive device 8 is composed of a plurality of pulleys 31, belts 32, gears 33, and chains 34 for rotating power of the power shaft 30 of the drive device 8. A structure for transmitting to the rotary drive shaft 9 via the transmission mechanism 35 is adopted. In the figure, reference numeral 36 denotes an accelerator lever that controls the rotational speed of the power unit 8, 37 denotes a clutch lever that switches the transmission mechanism 35 between a power transmission state and a transmission stop state, and 38 denotes a passenger (operator) that can be operated with feet. It is a foot brake.

  Further, the groove 7 is provided at the rear part of the frame 28 so as to protrude rearward from the right rear wheel 2R and the left rear wheel 2L.

  The grooving part 7 is configured to include the earth discharging plate part 40 on the left and right sides, and when the riding traveling part 4 is run and dragged while the grooving part 7 is in descending contact with the field 5, The earth removing plate portion 40 pushes the soil or mud left and right so that the grooves 6 are formed in the traveling direction of the field 5.

  In addition, as shown in FIG. 2 and FIG. 12, the grooving portion 7 is configured so that the earth discharging plate portion 40 having a length in the front-rear direction is opposed to the C shape in a plan view, and the lower edges thereof are connected to each other. A hull is formed by joining and facing in a V shape in the rear view, and the distance between the left and right earthing plate parts 40 is adjusted to be wider or narrower between the left and right earthing board parts 40. A groove width adjusting means 41 that can adjust the groove width of the groove 6 to be formed is provided so that the groove 6 having a width of 150 to 180 mm and a depth of 80 to 120 mm can be formed in the field 5.

  Further, the riding grooving machine of the present embodiment employs an air-cooled two-cycle 40cc class motor 8 as the driving device 8, and further sets the wheel diameters of the front wheels 1 and the rear wheels 2 (2R · 2L) to 600 mm. It is configured to exhibit a rotational speed of 30 rpm and a working speed of 0.6 m / second, and thereby, a working efficiency of 40a (when creating the groove 6 every 2 m) / hour can be exhibited.

  In this embodiment, the grooving portion 7 is provided so as to be able to be lifted and retracted and swingable to the left and right.

  Specifically, an elevating mechanism 49 that supports the grooving portion 7 so as to be movable up and down is provided.

  The elevating mechanism 49 is configured to control the elevating rotary shaft 22 in parallel with the rotary drive shaft 9 at a position below the drive device 8 of the frame 28 and behind the rotary drive shaft 9. A mounting portion 21 is attached to an intermediate portion of the lifting shaft 22, and a base end portion (front end portion) of the groove portion 7 is integrally connected to the rear outer side of the mounting portion 21, so The groove cutting part 7 is provided in a protruding state behind the moving shaft 22 via the attachment part 21, and the groove cutting part 7 is configured to rotate up and down when the lifting rotary shaft 22 is rotated.

  More specifically, as shown in FIGS. 12 and 13, bearing portions 51 are fixedly attached to the lower left and right portions of the rear end portion of the mounting mount 50, and a cylindrical elevating rotation is provided between the left and right bearing portions 51. The dynamic shaft 22 is pivotally supported. Reference numeral 62 in the figure denotes a fixing bolt for fixing the bearing portion 51 to the mounting mount 50.

  In addition, cylindrical connecting bodies 52 are fitted and fixed to both the left and right sides of the ascending / descending rotation shaft 22, and each connecting body 52 is provided with a connecting portion 53 provided with a connecting hole at an eccentric position. .

  Then, one end of the link bar 55 is pivotally attached to the connection portion 53 (connection hole) of the right connection body 52, and the other end of the link bar 55 is connected to the right side portion on the rear side of the frame 28. FIG. 14 shows an example of a pivoting pivotally pivotally attached to the base end portion of the lifting / lowering operation lever 56 shaped like a side view pivotably pivoted up and down, and pivoting the elevation manipulation lever 56 downward. As described above, the up-and-down rotation shaft 22 is rotated through the link bar 55, and the grooving portion 7 is rotated downward to project substantially horizontally rearward (use state at the time of grooving). When the operation lever 56 is rotated upward, the groove structure 7 is activated and the link structure is configured to retreat upward as shown in FIG.

  Further, when the elevating operation lever 56 is rotated downward, the base end of the lift operating lever 56 contacts a lower limit stopper pin 57 provided on the other end side of the link bar 55 and rotates downward. The grooving portion 7 in a state of being prevented from being overrotated is configured to be in a use state at the time of the grooving.

  Further, when the groove 7 is lifted and retracted on the front side of the groove 7, the groove 28 abuts against the rear end of the frame 28 (mounting mount 50), so An upper limit stopper 58 for preventing the rotation is attached.

  In addition, one end of a tension spring 54 as an urging body 54 is connected to the connection portion 53 (connection hole) of the left connection body 52, and the other end of the tension spring 54 is connected to the lower part on the rear side of the frame 28. The tensioning spring 54 causes the groove 7 to be used when the groove is cut (a state in which the lifting / lowering operation lever 56 is rotated downward) and a retreating state (the lifting / lowering operating lever 56 is rotated upward). And the state of being moved). Reference numeral 59 in the figure denotes a biasing body connecting portion for connecting the other end of the biasing body 54.

  Therefore, the groove cutting portion 7 can be lifted and retracted away from the field 5 where it is not desired to form the groove 6, and the riding section 4 can be moved from the farm road such as a paddle into the field 5 such as a paddy field. When entering, or conversely, when exiting the riding section 4 from the field 5 to the farm road, the groove section 7 is lifted and retracted so that the groove section 7 does not contact the step between the farm road and the field 5. It can also be configured.

  Further, in this embodiment, the attachment portion 21 is provided so as to be rotatable left and right with respect to the raising / lowering rotation shaft 22 below the riding traveling portion 4. Thus, the groove cutting part 7 is configured to be swingable left and right with respect to the riding traveling part 4 by rotating in the left-right direction.

  Specifically, as shown in FIG. 13, the attachment portion 21 is configured in a rectangular frame-like body on which the elevating rotation shaft 22 can be fitted. On the other hand, a female screw cylinder 61 serving as a screwing portion 61 protrudes outward from the opposed peripheral surface portion in the middle of the lifting rotary shaft 22 and is fitted on the lifting rotary shaft 22. The shaft bolt 60 as the swing shaft 60 is screwed to the female screw cylinder 61 from the middle portion of the upper and lower frame portions, respectively, so that the mounting portion 21 (grooving portion 7 ) Is attached to the ascending / descending rotation shaft 22 such that the ascending / descending rotation shaft 22 (passenger traveling unit 4) can be rotated left and right (oscillated).

  Therefore, the operator can steer the handle portion 12 to make the riding traveling portion 4 make a U-turn traveling or turn traveling. At this time, a grooved portion 7 that can swing left and right is provided on the riding traveling portion 4. On the other hand, the groove 6 is formed in the field 5 by swinging in the same direction as the turning direction of the riding section 4 so as to avoid earth pressure or mud pressure from the field 5. The groove cutting part 7 is configured not to be deformed or damaged during U-turn traveling or turning traveling (see FIG. 17).

  A central holding biasing portion 20 for biasing the groove cutting portion 7 swinging left and right with respect to the riding traveling portion 4 to the center is provided on the mounting portion 21.

  More specifically, as shown in FIGS. 14 to 16, a tension spring 20 </ b> A as a central holding biasing portion 20 having one end fixed to the lower portion of the rear side of the frame 28 is attached to the front frame portion of the attachment portion 21. When the other end portion is connected and the groove 7 swings left and right via the mounting portion 21 (when the mounting portion 21 rotates to the left and right with respect to the lifting shaft 22), When swinging to either side, the tension spring 20A is stretched so that the return force of the tension spring 20A causes the groove 7 to return to the center. .

  Further, the present embodiment is configured as follows.

  A self-propelled type that can be steered and provided with a grooved portion 7 that forms a groove 6 in a farm field 5 in a riding traveling portion 4 that is provided in a riding portion 3 with a front wheel 1 that is steered and at least a rear wheel 2 that is a driving wheel. In the riding grooving machine, at least the rear wheel 2 is configured as a plurality of wheels having a right rear wheel 2R and a left rear wheel 2L, and the right rear wheel 2R and the left rear wheel 2L are rotated by a driving device 8. The rotary drive shaft 9 is connected to the driven rotary drive shaft 9 for driving, and the rotary drive shaft 9 is connected to the connecting portion 10 for connecting the rotary drive shaft 9 and the right rear wheel 2R or the left rear wheel 2L. A drive / free switching mechanism 11 is provided for switching between a drive connection state that transmits the rotation and a free connection state that allows rotation without transmission of rotation, and the right rear wheel 2R and the left rear wheel 2L of the rear wheel 2 Two-wheel drive state with both wheels as drive wheels and one with free wheels It can be switched to a single-wheel drive state.

  The operation of this configuration will be described. The riding portion 3 has a front wheel 1 to be steered and a right rear wheel 2R and a left rear wheel 2L as rear wheels 2 which are at least drive wheels, and has at least a three-wheel configuration. The passenger traveling unit 4 is in contact with the front field 1 and at least the left and right rear wheels 2R and 2L in contact with the field 5, so that the front and rear wheels 2R and 2L are stably grounded regardless of whether the vehicle is stopped or traveling. 8 enables the field 5 to travel stably (self-propelled).

  At this time, the groove 6 can be formed in the field 5 by the groove cutting portion 7 provided in the riding traveling unit 4. However, the riding traveling unit 4 can perform straight traveling and turning traveling by steering the front wheel 1. Therefore, it is possible to easily form the groove 6 at a desired position on the field 5 by manipulating the riding traveling section 4 where the operator travels stably.

  Further, when the riding traveling unit 4 travels on the field 5, both the right rear wheel 2 </ b> R and the left rear wheel 2 </ b> L are driven by being connected to the rotational drive shaft 9 that is rotationally driven by the driving device 8. Even if it is a slippery field 5 such as a paddy field, a muddy rice field, or a field formed by soft and soft soil, good traction by the two-wheel drive of the right rear wheel 2R and the left rear wheel 2L On the other hand, it is ensured that it does not slip easily and exhibits excellent running performance in the field 5.

  The riding section 4 according to the present invention stably grounds not only on the field 5 but also on a road such as a paved road by the front wheel 1, at least the right rear wheel 2R, and the left rear wheel 2L. The device 8 can travel stably.

  In addition, at this time, the drive / free switching mechanism 11 provided in the connecting portion 10 that connects the rotary drive shaft 9 rotated by the drive device 8 and the right rear wheel 2R or the left rear wheel 2L is switched to perform this rotation. When the drive connection state in which the rotation of the drive shaft 9 is transmitted to the free connection state in which the rotation is not transmitted and the rotation is free, both the right rear wheel 2R and the left rear wheel 2L of the rear wheel 2 are the drive wheels. The two-wheel drive state (this state is preferable when traveling in the slippery field 5) is switched to the one-wheel drive state in which one of the right rear wheel 2R and the left rear wheel 2L is a free wheel. it can.

  That is, when the vehicle travels by turning the front wheel 1 of the riding section 4, there is a rotational difference between the right rear wheel 2R (inner wheel or outer wheel) and the left rear wheel 2L (outer wheel or inner wheel), but the right rear wheel 2R. By switching the drive / free switching mechanism 11 so that one of the left rear wheel 2L and the left rear wheel becomes a free wheel, a difference in rotation between the drive wheel and the free wheel during turning is allowed. On the other hand, the front wheel 1 can be steered even on a paved road where a high frictional force is generated, and the riding section 4 of the present invention can smoothly turn and turn even on the road, and there is no obstacle to the road running. .

  Further, the drive / free switching mechanism 11 provided in the connecting portion 10 that connects the rotation drive shaft 9 and the right rear wheel 2R or the left rear wheel 2L has a complicated differential device such as a so-called differential gear on the rotation drive shaft 9. Without requiring a complicated electronic switching control device or the like, for example, the right rear wheel 2R or the left rear wheel 2L is rotatably engaged with the rear wheel connecting portion 15 of the rotary drive shaft 9. An engaging portion 16 is provided, and an engaging portion 17 is provided to detachably engage with the connecting portion 10 between the rear wheel connecting portion 15 and the engaging portion 16 so as to be in the driving connection state. Since it is possible to design a simple structure in which the drive connection state is achieved by locking with, and the free connection state is achieved by removing the locking portion 17, it can be realized easily and at a low cost. The simple drive / free switching mechanism 11 makes switching operations easy. Thus, it is possible to easily switch from the field 5 traveling application to the road traveling application and to perform road traveling (similarly, a switching operation from the road traveling application to the field 5 traveling application is easily performed).

  Therefore, the conventional seed riding grooving machine uses a freight vehicle such as a light truck to carry between the worker's home and the field 5, and the loading / unloading operation of the freight vehicle on the loading platform is very labor intensive. However, in the riding grooving machine of the present invention, since it is possible for the worker to travel on the road between the home and the field 5, it is difficult to load and unload the cargo vehicle. Is completely unnecessary and extremely practical.

  Therefore, since it comprised as mentioned above, since the riding traveling part 4 touches the field 5 stably by the front wheel 1 and the plurality of rear wheels 2, the field 5 can be stably traveled (self-propelled) by the drive device 8. In addition, the operator can easily form the groove 6 at a desired position on the field 5 by steering the front wheel 1 and the right rear wheel 2R and the left rear wheel 2L are driven. It can exhibit excellent driving performance with excellent resistance to slipping in fields 5 such as muddy rice fields and fields made of soft and soft soil, and can be grounded not only on fields 5 but also on roads like paved roads. Since the free switching mechanism 11 can easily switch to the one-wheel drive state in which one of the right rear wheel 2R and the left rear wheel 2L is a free wheel, smooth turning traveling by steering the front wheel 1 is possible. There is no obstacle to driving on the road, As a result, it is possible to travel on the road between the home and the farm field 5, so there is no need for troublesome loading / unloading work on the freight vehicle during transportation, and the drive / free switching mechanism 11 is rotated. Since the drive shaft 9 and the right rear wheel 2R or the left rear wheel 2L are provided in the connecting portion 10 without a complicated differential device such as a so-called differential gear or a complicated electronic switching control device. Since a simple structure can be designed, it can be realized easily and at a low cost, and a switching operation can be easily performed.

  Further, in this embodiment, the front wheel 1 is provided at the front portion of the riding portion 3 provided with the handle portion 12 for steering the front wheel 1, the saddle portion 13, and the footrest portion 14, and the drive device 8 is provided at the rear portion. The riding wheel 4 having a three-wheel configuration is configured by providing the rear wheel 2 including two wheels, the right rear wheel 2R and the left rear wheel 2L, which are rotationally driven by the vehicle.

  Accordingly, since the vehicle is configured as described above, the three-wheel configuration including the front wheel 1 and the left and right rear wheels 2R and 2L enables stable traveling on the field 5 and the road, and the saddle 13 You can ride in a riding posture with your feet on the footrest part 14 and your hand on the handle part 12, so you can ride in a comfortable posture and your feet will not get tired, and you ride a bicycle or motorcycle It becomes a riding grooving machine with a configuration that is more practical, such as being able to perform operations such as steering the handle 12 very easily with a sense.

  In this embodiment, the rotational drive shaft 9 that is rotationally driven by the drive device 8 provided in the riding traveling portion 4 is disposed in the lower horizontal direction, and the right rear wheel is disposed at one end of the rotational drive shaft 9. 2R is connected, and the left rear wheel 2L is connected to the other end, and the drive / free switching mechanism is connected to one connecting part 10 or both connecting parts 10 of the rotary drive shaft 9 and each of the rear wheels 2R and 2L. 11 is provided.

  Accordingly, since it is configured as described above, the drive / free switching mechanism 11 is provided at least in the configuration of the rear wheels 2 serving as the drive wheels and the connecting portion 10 between the rotary drive shaft 9 and the right rear wheel 2R or the left rear wheel 2L. It becomes a riding grooving machine having a configuration that is more practical and can be easily designed and realized.

  Further, in this embodiment, the right rear wheel 2R or the left rear wheel 2L is provided with an engaging portion 16 that is rotatably engaged with a rear wheel connecting portion 15 of the rotary drive shaft 9, and this rear wheel connection. The connecting portion 10 between the portion 15 and the engaging portion 16 is detachably locked to be provided with a locking portion 17 that is in the driving connection state, and the driving connection state is achieved by locking with the locking portion 17. The drive / free switching mechanism 11 is configured to be in the free connected state by removing the locking portion 17.

  Therefore, since it is configured as described above, it is possible to easily design and realize a connection structure between the rotary drive shaft 9 that becomes a free wheel and the right rear wheel 2R or the left rear wheel 2L by switching the drive / free switching mechanism 11. The driving and free switching mechanism 11 having excellent switching operability in which the switching operation is extremely easily performed can be configured, and the riding grooving machine has a more practical configuration.

  Further, in this embodiment, the rear wheel connecting portions 15 are provided on the left and right sides of the rotary drive shaft 9, and the engaging portions 16 provided on the right rear wheel 2R or the left rear wheel 2L on the rear wheel connecting portion 15. Is provided in a state of being prevented from coming off, and provided with the locking portion 17 for locking the rear wheel connecting portion 15 and the engaging portion 16, and the locking portion 17 is constituted by a locking pin 17A. As a structure for detachably inserting and locking in a locking hole 18 provided in the rear wheel connecting portion 15 and the engaging portion 16, this driving pin is engaged and locked by inserting and locking the locking pin 17A. The drive / free switching mechanism 11 is configured to be in the free connected state by removing the pin 17A.

  Therefore, since it is configured as described above, the drive / free switching mechanism 11 having excellent switching operability that can be switched by a simple operation by simply inserting and removing the locking pin 17A can be easily designed and realized. It becomes a riding grooving machine with an excellent configuration.

  Further, in this embodiment, the rear wheel connecting portions 15 are provided at both left and right end portions of the rotary drive shaft 9 horizontally disposed below the riding portion 3, and the right rear wheel 2R or the left rear wheel 2L is provided. The engagement portion 16 is provided in the center portion, and a retaining portion 19 is provided in the rear wheel coupling portion 15 to prevent the rear wheel coupling portion 15 from engaging after the engagement portion 16 is engaged. A knob portion 42 of the locking pin 17A that locks and connects 16 is provided on the left and right of the riding portion 3 in an exposed state.

  Therefore, since it is configured as described above, since the pinching portions of the locking pin are provided in the exposed state on the left and right sides of the riding portion, the driving that can easily perform the insertion locking operation and the removal operation of the locking pin.・ It becomes a riding grooving machine with a configuration that excels in switching operability of the free switching mechanism.

  This will be described in more detail below.

  In this embodiment, the connecting portion 10 for transmitting the rotation of the rotary drive shaft 9 to the connecting portions 10 of the rotary drive shaft 9 and the rear wheels 2R and 2L and the rotation are not transmitted and the rotation is not transmitted. A drive / free switching mechanism 11 for switching to a free connected state is provided so that both the right rear wheel 2R and the left rear wheel 2L of the rear wheel 2 are drive wheels, and one is a free wheel. The single-wheel drive state can be switched freely. The drive / free switching mechanism 11 may be provided in one connecting portion 10 between the rotary drive shaft 9 and each of the rear wheels 2R and 2L.

  Specifically, the connecting portion 10 between the rotational drive shaft 9 and each of the rear wheels 2R and 2L is fitted and engaged with the rear wheel connecting portions 15 at both left and right ends of the rotational drive shaft 9, as shown in FIG. The cylindrical engaging portion 16 is provided at the center of the right rear wheel 2R and the left rear wheel 2L.

  In addition, a locking portion 17 is provided that is detachably locked to the connecting portion 10 between the rear wheel connecting portion 15 and the engaging portion 16 so as to be in the driving connection state, and is locked by the locking portion 17. Thus, the drive / free switching mechanism 11 is configured so as to be in the drive connection state and to be in the free connection state by removing the locking portion 17.

  More specifically, the locking portion 17 is constituted by a locking pin 17A having a knob portion 42 at the base end portion.

  The rear wheel connecting portion 15 is formed with a locking hole 18 having a hole length in a direction orthogonal to the axial length direction of the rotary drive shaft 9, and the engaging portion 16 has the engaging portion 16. A locking hole 18 having a hole length in a direction perpendicular to the cylinder length direction is formed through.

  Then, as shown in FIG. 6, the engaging portion 16 is fitted and engaged with the rear wheel connecting portion 15 so that both the locking holes 18 are aligned with each other. As a configuration in which the locking pin 17A is detachably inserted and locked, the driving pin is connected by inserting and locking the locking pin 17A, and the free connecting state is set by removing the locking pin 17A. The drive / free switching mechanism 11 is configured.

  Further, the knob portion 42 is formed by bending a wire rod into a C shape and attaching both end portions thereof to opposite side surfaces of the base end portion of the locking pin 17A. Further, the knob portion 42 is pivotally attached to both ends of the locking pin 17A so that the locking pin 17A is inserted and locked in each communicating locking hole 18. The knob portion 42 is configured to be rotated to be fitted into the engaging portion 16 (see FIG. 7), and the fitted state to the engaging portion 16 is held in a rotationally biased state. Thus, the pivoting positions of both ends of the knob part 42 are made different without being coaxial. Accordingly, when the locking pin 17A is inserted and locked in each locking hole 18 and the knob part 42 is rotated to be fitted in the engaging part 16, the knob part 42 can be easily engaged. In order not to be fitted / removed from 16, the drive connection state can be satisfactorily maintained.

  In addition, when the pin diameter dimension of the locking pin 17A and the hole diameter dimension of each locking hole 18 are set to substantially coincide with each other, the locking pin 17A is inserted and locked into each communicating locking hole 18. In addition, there is a connection structure in which the driving force is satisfactorily transmitted without causing large backlash between the rotary drive shaft 9 (rear wheel connecting portion 15) and the rear wheels 2R and 2L (engaging portion 16).

  Further, the locking hole 18 formed in the engaging portion 16 is provided outside the spoke portion 43 of the right rear wheel 2R and the left rear wheel 2L, and the locking pin inserted and locked in the locking hole 18 is provided. 17A is configured to be exposed outside the spokes 43 of the right rear wheel 2R and the left rear wheel 2L. That is, the locking pin 17A is provided in an exposed state on the left and right of the riding portion 3 so that the locking operation of the locking pin 17A can be inserted into and removed from the locking holes 18, and the right rear wheel 2R and the left rear wheel can be removed. It can be easily performed at an outer position of 2L.

  Further, in this embodiment, the left and right ends of the rotary drive shaft 9, that is, the rear wheel connecting portion 15, the retaining portion for engaging the rear wheel connecting portion 15 with the engaging portion 16 is set to the rear retaining state. 19 is provided.

  Specifically, the retaining portion 19 is formed by penetrating a disc-shaped retaining plate 44 having a diameter approximately the same diameter as the cylindrical diameter of the engaging portion 16 and the center of the retaining plate 44. It is configured to include a screwing tool 47 that employs a bolt 47 that is inserted into the through hole 45 and screwed into a screwing hole 46 formed in the rear wheel connecting part 15, and the engaging part 16 is provided in the rear wheel connecting part 15. The retaining member 44 is fitted and engaged, and the retaining plate 44 is brought into contact with the end surface of the rear end connecting portion 15 from the outside of the engaging portion 16, and the screwing tool 47 is inserted from the outer side of the retaining plate 44 through the through hole 45. By screwing into the screw hole 46, the retaining portion 19 is fixed to the rear end connecting portion 15, and the engaging portion 16 (the right rear wheel 2R and the left rear wheel 2L) is connected to the rear wheel by the retaining plate 44. It is configured to be in a state of being prevented from coming off from the portion 15.

  Further, in the state where the engagement portion 16 is prevented from being detached by the retaining portion 19, the engagement portion 16 is not tightened by the retaining plate 44, and the rear wheel 2 (the right rear wheel 2R and the left rear wheel 2L) is free. The rear wheels 2R and 2L can be rotated by, for example, slightly lifting the riding traveling portion 4 so that the locking holes 18 and the engaging portions 16 of the rear wheel connecting portion 15 can be rotated. The positioning operation of the locking holes 18 is facilitated.

  In the present embodiment, the following wheels are employed as the front wheel 1 and the rear wheel 2 (the right rear wheel 2R and the left rear wheel 2L).

  In a field work machine wheel provided with a plurality of mudboard portions 23 in the circumferential direction on the outer periphery of the wheel, the outer periphery forming plate portion 24 with the plate edge as the outer periphery protrudes in a direction intersecting the plate surface direction. The scraper plate portion 23 is provided in a state in which the tip portion does not protrude from the outer peripheral edge, and an uneven edge 25 that does not sharpen the convex portion 26 is formed on the outer peripheral edge of the outer peripheral forming plate portion 24 between the scraper plate portions 23. is doing.

  Explaining the operation of this configuration, the scraper plate portion 23 is rotated by the rotation of the wheel, and the scraper plate portion 23 sequentially scrapes the mud into the mud so that it can run well without idling. Become.

  Each mud board portion 23 does not protrude to the outer periphery, and the mud plate portions 23 are connected by an outer circumference forming plate portion 24.

  That is, the scraper plate portion 23 is not provided in the outer peripheral formation plate portion 24 having the plate edge as the outer periphery so as to protrude from the outer periphery to the outer periphery. In other words, it protrudes in the direction of the plate surface and performs a water scuffing action or a mud scavenging action, but does not protrude in the outer peripheral direction, so that it can run without rattling on a coastal road or a normal paved road.

  The mud board portions 23 are connected to each other by an outer periphery forming plate portion 24, and an uneven edge 25 is formed on the outer peripheral edge which is a plate edge of the outer periphery forming plate portion 24. Convex outer edge) 26 is cut into the mud (cut), and even if there is a hard layer (rock layer) such as a clay layer at the bottom of the mud, it will also bite and slip into the hard layer in the mud. Difficult so-called good grip action.

  Therefore, it can run in paddy fields and muddy mud. The shaving plate portion 23 does not protrude, and the convex portion 26 of the concavity and convexity opposite edge 25 of the outer peripheral forming plate portion 24 between the mud scribing plate portions 23 is not sharp, so it can be rattled with a small allowable range of vibration. Not only noise and vibration but also breakage and damage are suppressed, and sufficiently good road driving is possible.

  Therefore, because it is configured as described above, it can run well in the mud of paddy fields and muddy rice fields as before, even in soft soft soil, even if there is a rock part, it can run well and it can run well, and usually It is possible to travel on other roads, and it is a groundbreaking wheel for a field work machine capable of traveling on a revolutionary road that has little play and is not easily damaged or damaged.

  In particular, in a farm work machine that travels on a ride, the wheels can be traveled on a road to a farm field and have excellent practicality.

  Further, in this embodiment, the gap between the scraping plate portions 23 provided with a gap in the circumferential direction is substantially equal to the outer diameter dimension of the tip of the scraping plate portion 23 without forming a valley portion having a short outer diameter. The outer periphery forming plate portion 24 having an outer diameter is continuously provided, and the uneven edge 25 is formed on the outer peripheral edge of the outer periphery forming plate portion 24 between the mud plate portions 23.

  In the present embodiment, the uneven edge 25 is a U-shaped uneven edge 25 in which a U-shaped convex portion 26 having a flat or arcuate tip edge is repeated at intervals.

  Further, in this embodiment, the plate-shaped mud board portion 23 that projects in a protruding state on the plate surface of the outer periphery forming plate portion 24 is provided in a protruding manner.

  Therefore, since it comprised as mentioned above, the said effect | action and effect are demonstrated reliably and favorably, and it becomes the wheel for field work machines which can drive | work very excellent road.

  In the present embodiment, the outer periphery forming plate portion 24 has a disc shape or a donut plate shape, and is formed by superposing a plurality of metal plates 27.

  Therefore, since it is configured as described above, the above functions and effects can be further reliably and satisfactorily exhibited, and the strength can be greatly improved with a simple configuration, and the vehicle can travel on ordinary paved roads, further improving durability. It will be an excellent groundbreaking wheel for field work machines capable of traveling on the road.

  This will be described in more detail below.

  The present embodiment is a wheel capable of running on a field provided with a large number of metal-made, wide-plate-shaped mudboard portions 23 with a gap in the circumferential direction on the outer peripheral portion of the wheel formed of a metal plate on the outer periphery of the spoke portion 43. Each of the scraper plates 23 protrudes in a direction orthogonally intersecting with the plate surface direction and the front end portion in the circumferential direction does not protrude from the outer periphery. It is set as the structure which provided.

  That is, the present embodiment is made of metal, and is not a metal disc, but a spoke portion 43 is provided radially at the center of the cylindrical engagement portion 16 as shown in FIGS. The outer periphery forming plate portion 24 is provided with a donut-shaped outer periphery forming plate portion 24 on the outer periphery, and the outer periphery forming plate portion 24 protrudes on both the front and back sides of the plate surface but hardly protrudes from the outer peripheral edge. There are 23.

  Further, an uneven edge 25 that does not sharpen the protrusion 26 is formed on the outer peripheral edge of the outer periphery forming plate 24 between the mud plates 23.

  That is, the outer circumference having an outer diameter dimension substantially equal to the outer diameter dimension of the tip of the mud board section 23 without forming a valley section with a short outer diameter between the mud board sections 23 provided with a gap in the circumferential direction. The irregular plate 25 is formed on the outer peripheral edge of the outer peripheral plate portion 24 between the mud plate portions 23.

  The uneven edge 25 is a rectangular wave-shaped U-shaped uneven edge 25 in which a U-shaped convex part 26 having a flat or arcuate tip edge is repeated at intervals.

  More specifically, as shown in FIGS. 8, 10, and 11, the outer periphery forming plate portion 24 of the present embodiment has a donut plate shape and is formed by superposing two metal plates 27 to enhance the reinforcement. I am trying. The outer periphery forming plate portion 24 is provided with reinforcing ribs 63 in the circumferential direction to further increase the strength, but the reinforcing ribs 63 are formed in a bulging shape on the respective metal plates 27 to be polymerized, and this is superposed. The strength is increased. In the present embodiment, a notch 64 is formed in the center direction from the outer peripheral edge of the outer periphery forming plate portion 24, or a notch 65 is also formed in the mud plate portion 23, which is inserted into and fixed to the mud plate portion. As shown in FIG. 9, the outer peripheral end portion of the mud plate portion 23 does not protrude from the outer peripheral edge of the outer peripheral forming plate portion 24 as much as possible, and this protrusion amount is slight and does not protrude. Even paved roads such as these are provided so that passengers can travel sufficiently.

  Further, as shown in FIG. 8, a notch 66 is formed at the outer end portion of the spoke portion 43 to be locked and fixed to the inner peripheral edge of the outer peripheral forming plate portion 24, and a cylindrical engagement is formed at each inner end portion. Part 16 is fixed.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 2R Right rear wheel 2L Left rear wheel 3 Riding part 4 Riding traveling part 5 Farm 6 Groove 7 Grooving part 8 Drive device
12 Handle section
13 Saddle
14 Foot rest
20 Central holding biasing section
20A Tensile spring
21 Mounting part
22 Lifting shaft

Claims (6)

  In a self-propelled riding grooving machine capable of steering turning, in which a riding section provided with a driving wheel is provided on a riding section provided with a steering wheel section and a grooving section for forming a groove in a farm field is provided, it can be lifted and retracted freely. A riding grooving machine characterized in that the provided grooving part is provided so as to be swingable to the left and right.   2. The riding grooving machine according to claim 1, further comprising a central holding urging portion that urges the grooving portion that swings left and right to return to the center.   A mounting portion connected to the base end portion of the grooving portion is provided at the lower portion of the riding traveling portion so as to be rotatable left and right. The central holding biasing portion is provided on the mounting portion, and the grooving portion is the mounting portion 3. The riding grooving machine according to claim 2, wherein the center holding urging portion is stretched to cause a return urging to the center when swinging to the left and right via the guide.   As the central holding biasing portion, a base end portion of the groove cutting portion is provided outside the mounting portion provided at the lower portion of the riding traveling portion so as to be rotatable left and right, and one end portion is fixed inside the mounting portion. The other end of the tensile spring is connected, and when the groove cutting part swings left and right via the mounting part, the central holding biasing part is extended regardless of which side the rocking part swings. 4. The riding grooving machine according to claim 3, wherein the urging force is returned to the center.   The said traveling part is provided with the raising / lowering rotation axis | shaft which raises and retracts the said groove cutting part horizontally, The said groove cutting part was provided in this raising / lowering rotation shaft so that rocking | fluctuation right and left was possible. The riding grooving machine of any one of 1-4.   A front wheel to be steered is provided at the front part of the riding part, and a rear wheel that is rotationally driven by a driving device is provided at the rear part. 2. The self-propelled traveling section having a three-wheel configuration capable of steering and turning is provided by providing a steering section, a saddle section, and a footrest section for steering the front wheels in the riding section. The riding grooving machine of any one of -5.

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