JP4950619B2 - Riding grooving machine - Google Patents

Description

  The present invention relates to a riding grooving machine suitable for forming a groove for quickly and smoothly performing water supply and drainage in a field such as a paddy field.

  As this type of riding grooving machine, as seen in Patent Document 1 below, a driving wheel is provided at the front of the main frame, a grooving plate is provided at the rear of the main frame, A seating seat on which an operator straddles via a fixed plate is provided at the center portion, a handle is provided at the front portion of the seating seat, and an engine for driving the wheel includes a main frame and a grooved plate What is distributed around is known.

JP 2005-73540 A

  However, since the conventional riding grooving machine as described above is provided with a handle but does not have a steering mechanism, when changing and correcting the traveling direction (when correcting the trajectory), it is necessary to put on the foot and It is necessary to tilt the machine and pivot the entire machine around the foot, and it is cumbersome to change and correct the direction of travel. There were problems such as becoming.

  In addition, even when a steering mechanism is provided, there are problems such as difficulty in traveling while maintaining straight travel and difficulty in driving.

  Furthermore, this kind of riding grooving machine runs in an unstable state in a poorly cultivated field, so adjustment of the throttle opening of the engine (adjustment of the running speed) and clutch connection / disconnection operation (from the engine to the drive wheel) It is desirable that the power transmission connection / disconnection operation can be performed as easily and easily as possible.

  In addition, if the clutch is disengaged (disengagement of power) when the throttle opening is large (during high-speed driving), the machine will stop suddenly, especially in the case of a riding grooving machine with the center of gravity on the front side. May cause problems such as falling to the front side.

  The present invention has been made in view of the above circumstances, and its main purpose is to easily change and correct the direction of travel, to cleanly form grooves, and to improve straightness. An object of the present invention is to provide a riding grooving machine that can be operated easily.

  Other objectives include engine throttle opening adjustment (running speed adjustment) and clutch connection / disconnection operation (power transmission connection / disconnection operation from the engine to the drive wheel) as easily as possible, and a forward overturn due to a sudden stop. It is in providing the riding grooving machine which can prevent etc.

In order to achieve the above-described object, the riding grooving machine according to the present invention basically includes a driving wheel, a driving drive system including an engine, a front frame provided with a steering handle, and an operator straddling. A seat frame and a rear frame provided with a grooved plate, wherein the front frame is steerable in a horizontal plane with respect to the rear frame, and an operation point of the handle on the front frame is It is characterized by being offset forward by a predetermined distance from the turning center of the front frame with respect to the rear frame .

  The front frame and the rear frame are preferably connected so as to be rotatable in a horizontal plane through a rotation shaft provided on one of them and a bearing provided on the other.

  In a more preferred aspect, the front frame and the rear frame are connected via a connecting member that can be elastically bent in a horizontal plane.

  In this case, the elastically bendable connecting member is constituted by a leaf spring disposed perpendicular to the front frame and the rear frame.

  The leaf spring preferably has a structure in which a plurality of metal plates are stacked.

  On the other hand, in another preferred embodiment of the riding grooving machine according to the present invention, a single operation lever is commonly used for adjusting the throttle opening of the engine and for connecting / disconnecting power transmission from the engine to the drive wheel. .

  In this case, in a preferred embodiment, both the throttle opening adjustment and the power transmission connection / disconnection can be performed simultaneously by swinging the operation lever.

  In a preferred aspect, the power transmission is cut off after the throttle opening is reduced to some extent when the operation lever is swung in one direction.

  In another preferred embodiment, the operation lever has a T shape, a gate shape, or a loop shape, and can be operated with either the left or right finger.

  In another preferred embodiment, the handle is T-shaped, gate-shaped, or loop-shaped, and a swing fulcrum of the operation lever is provided on the vertical side or the left and right sides of the handle.

  In the riding grooving machine according to the present invention configured as described above, a front frame provided with a drive wheel, a travel drive system including an engine, and a steering handle is provided, for example, via a rotating shaft and a bearing. Since the seating seat on which the operator straddles and the grooving plate are provided, the frame is connected to the frame so as to be able to turn in the horizontal plane. Therefore, the groove can be formed neatly because the machine does not have to be tilted when the traveling direction is changed and corrected, compared to a conventional grooving machine that does not have a steering mechanism.

  In addition, the operating point of the handle on the front frame is offset forward by a predetermined distance from the center of rotation of the front frame with respect to the rear frame, and further, the traveling drive system including the engine is mounted on the front frame to make it heavy, Since the steering operation (steerability) is slow and heavy, the required straightness can be ensured.

  Further, since the front frame and the rear frame are connected to each other via a leaf spring arranged perpendicular to them, the steering operation (steerability) becomes dull and heavy, so the required straightness In addition to ensuring that the wheels and the front frame turn only in a very narrow angle range compared to the case where they are connected via a rotating shaft and a bearing, the handling is improved, and the structure is further improved. In addition to simplifying, reducing weight, and reducing costs, there is no rotating sliding part, which makes it difficult for malfunctions to occur. In addition, the elastic restoring force of the leaf springs makes it possible to restore the neutral straight position (self-neutral position). (Restoring function) is also provided, and convenience is further improved.

  In addition, since the rear frame provided with the grooved plate is rotatably connected to the front frame provided with the drive wheel (front wheel) via a leaf spring or the like, the traveling direction of the grooved plate Is automatically adjusted to the traveling direction of the driving wheel (front wheel) by the resistance of mud during traveling. For this reason, even if there is a center line deviation or angular blur (non-parallel) between the drive wheel (front wheel) and the grooved plate during manufacturing and assembly, the required straightness is ensured during travel. it can. This means that the allowable range of dimensional accuracy and parallelism is widened during manufacturing and assembly, and as a result, the cost can be reduced.

  On the other hand, a single operating lever is shared for throttle opening adjustment and power transmission / disconnection, and by swinging this operating lever, both throttle opening adjustment and power transmission / disconnection can be performed simultaneously. Therefore, both the throttle opening adjustment operation and the power transmission connection / disconnection operation can be performed very easily and easily by one touch.

  Further, when the operation lever is swung in one direction, the power transmission is cut off after the throttle opening is reduced to some extent, so that it is difficult for the vehicle to fall forward due to a sudden stop.

  Embodiments of a riding grooving machine of the present invention will be described below with reference to the drawings.

  1 and 2 are a left side view showing a first embodiment of a riding grooving machine according to the present invention, and a plan view in a state where an engine and the like are removed.

  The riding grooving machine 10 shown in the drawing includes a front frame 20 having a cross-sectional groove shape and a ladder-like rear frame 50. The front frame 20 is provided with a driving wheel 12, a traveling drive system including the engine 15, and a steering handle 22, and the rear frame 50 is provided with a seating seat 55 and a grooved plate 14 on which an operator rides. The front frame 20 and the rear frame 50 are provided as a pair of left and right rotating shafts 21 that hang downward from the lower surface of the front frame 20 and a pair of left and right that are connected and fixed to the front portion of the rear frame 50. The connecting and holding plates 32, 32 having a letter-like shape when viewed from the side, are rotatably connected in a horizontal plane via a bearing 34 that rotatably supports the rotating shaft 21.

  More specifically, an engine (small air-cooled gasoline engine) 15 with a speed reducer 17 is mounted on the upper surface of the front frame 20, and the power of the engine 15 is reduced as shown in FIGS. 3 and 4. The belt pulley type power transmission mechanism 26 in the case 24 disposed on the lower side of the right side surface of the front frame 20 from the output shaft 18 and the multi-stage gear in the wheel support frame 25 held and fixed to the fixed connecting plate 23. It is transmitted to the drive wheel 12 (the axle 13 thereof) via the type reduction mechanism 27.

  The rear frame 50 is attached with a groove plate 14 having a substantially isosceles triangle shape in plan view via a support column 52 that is provided to hang downward toward the rear portion of the lower surface. Further, the front end portion of the rear frame 50 and the lower end portion of the support column 52 are connected by a reinforcing stay 56.

  A horizontal holding plate 36 is attached to the front end portion of the front frame 20, and both lower ends of a steering handle 22 that is tilted slightly rearward in a gate shape are fixed to both ends of the horizontal holding plate 36. Here, both lower ends of the handle 22 are set as handle operating points P in the front frame 20, and the handle operating points P are predetermined from the rotation center (center of the rotation shaft 21) O of the front frame 20 with respect to the rear frame 50. Is offset forward by a distance La.

  A front projecting plate 37, a rice entanglement preventing plate 38, and the like are disposed on the front and left and right lower sides of the front frame 20 so as to cover the upper half of the front side of the drive wheel 12.

  In the riding grooving machine 10 of the present embodiment configured as described above, the front frame 20 provided with the driving wheel 12, the traveling drive system including the engine 15, and the steering handle 22 is connected to the rotating shaft 21. Since the seating seat 55 on which the operator straddles and the grooved plate 14 are provided via the bearing 34 and is connected to the frame 50 so as to be rotatable in a horizontal plane, the handle 22 is operated. Therefore, it is easier and easier to change and correct the direction of travel (trajectory correction) compared to conventional grooving machines, and it is not necessary to tilt the machine when changing the direction of travel. be able to.

  Further, the operating point P of the handle 22 on the front frame 20 is offset forward by a predetermined distance La from the turning center O of the front frame with respect to the rear frame, and a traveling drive system including the engine 15 is mounted on the front frame 20. Therefore, the steering operation (steerability) is dull and heavy, and the required straightness can be ensured.

  Further, the rear frame 50 provided with the grooved plate 14 is connected to the front frame 20 provided with the drive wheel (front wheel) 12 via the rotary shaft 21 and the bearing 34 so as to be rotatable. The traveling direction of the grooved plate 14 is automatically adjusted to the traveling direction of the drive wheel (front wheel) 12 by the resistance of mud during traveling. For this reason, even if there is a deviation of the center line or angular blur (non-parallel) between the drive wheel (front wheel) 12 and the grooved plate 14 during manufacturing and assembly, the required straightness during running Can be secured. This means that the allowable range of dimensional accuracy and parallelism is widened during manufacturing and assembly, and as a result, the cost can be reduced.

  In addition to the above configuration, in the present embodiment, for adjusting the throttle opening of the engine 15 and for connecting / disconnecting power transmission from the engine 15 to the drive wheel 12 so as to be close to the upper half on the front side of the handle 22 A gate-shaped operation lever 40 that also serves as a pivot is provided.

  The lower ends of the left and right side portions 40A and 40B of the operation lever 40 are coupled to the lower end portions of the left and right side portions 40A and 40B while being pivotably coupled by pins 40a and 40a near the center in the height direction of the handle 22. The left and right tension arms 41 (FIGS. 1 and 4) have one end of a bowden cable 42 (inner cable) for adjusting the throttle opening. However, one end of a power transmission connection / disconnection Bowden cable 45 (inner cable) is connected to the right tension arm 43 (FIGS. 3 and 4) via a tension coil spring 44, respectively.

  The other end of the left Bowden cable 42 (the inner cable thereof) is connected to the carburetor throttle valve of the engine 15, and the throttle valve attached to the throttle valve is always at the minimum opening (idle opening). The left Bowden cable 42 (the inner cable) of the left side Bowden cable 42 is moved to the initial position (the upper side portion 40C is the handle 22 shown by a solid line in FIGS. 1 and 3). It pulls in the direction to return to the position away from the upper side).

  On the other hand, the other end of the right Bowden cable 45 (the inner cable thereof) is connected to a belt tension clutch 45 attached to the belt pulley type power transmission mechanism 26. Specifically, as shown in FIGS. 3 and 4, the belt tension clutch 45 has a known configuration, and a tension applying pulley 48 and an arm 47 that press-contact the belt 26 a of the belt pulley type power transmission mechanism 26. In addition to the swing support shaft 46 and the pulling locking pin 49, a biasing spring for biasing the tension applying pulley 48 in a direction separating the belt 26a (direction for cutting off power transmission) is provided. By this urging spring, the Bowden cable 45 (the inner cable thereof) on the right side moves the operation lever 40 to the initial position indicated by the solid line in FIGS. 1 and 3 (the upper side portion 40C is separated from the upper side portion of the handle 22). Pull in the direction to return to (position).

  Here, when the operating lever 40 is pulled toward the handle 22 from the initial position, the throttle valve is pulled by the left Bowden cable 42 (inner cable thereof) to open the throttle opening from the minimum (idle opening). The throttle opening is in accordance with the swing angle of the operation lever 40 at that time, and when the swing angle reaches the maximum angle γ (= α + β), the throttle opening becomes maximum.

  At the same time, the belt tension clutch 45 is pulled by the right Bowden cable 45 (inner cable thereof), and the tension applying pulley 48 is swung in a direction in which it approaches and comes into pressure contact from a position away from the belt 26a (power transmission cutting position). It can be moved. In this case, when the operating lever 40 is swung from the initial position by an angle α, the tension applying pulley 48 is pressed against the belt 26a, and the required tension is applied to the belt 26a. Power transmission from the engine 15 to the drive wheel 12 becomes possible. When the operating lever 40 is further pulled toward the handle 22 from the state of the swing angle α, the coil spring 44 is extended, and the tension applying pulley 48 is further pressed against the belt 26a.

  As described above, the operation lever 40 is commonly used for adjusting the throttle opening and for connecting / disconnecting the power transmission. By swinging the operation lever 40, both the throttle opening adjustment and the power transmission / disconnection can be performed simultaneously. Therefore, both the throttle opening adjustment operation and the power transmission connection / disconnection operation can be performed very easily and easily with one touch. In addition, since the operation lever 40 has a gate shape, it can be operated with either the left or right finger, which improves convenience.

  On the other hand, in a state where the operation lever 40 is largely swung from the initial position, that is, the rocking angle is the maximum angle γ (= α + β), the power transmission is performed with the throttle opening being maximum, that is, the engine torque is maximum. Since this is done, the riding grooving machine 10 travels at a high speed. When the finger is released from the operation lever 40 in this high-speed running state, the operation lever 40 is returned to the initial position by the urging force of the urging spring attached to the throttle valve or the belt tension clutch 45, and the riding grooving machine 10 stops.

  In this case, in the present embodiment, the throttle opening is reduced to some extent (returned from the maximum opening by the swing angle β), that is, the traveling speed is low due to the configuration as described above. Then, since the power transmission is cut off, it is difficult for the vehicle to fall forward due to a sudden stop.

  5 and 6 are a left side view showing the riding grooving machine 10 'according to the second embodiment, and a plan view with the engine and the like removed. 5 and 6, the same reference numerals are given to the parts having the same configuration functions as the respective parts in the riding grooving machine 10 shown in FIGS. 1 and 2 described above, and the duplicate description will be omitted. Differences from the first embodiment will be mainly described.

  In the riding grooving machine 10 ′ of the illustrated embodiment, the front frame 20 and the rear frame 50 are arranged perpendicular to the front frame 20 and the rear frame 50 as connecting members that can be elastically bent in a horizontal plane. They are connected by existing leaf springs 60.

  Specifically, the leaf spring 60 has a structure in which a plurality of metal plates (for example, five metal plates having a thickness of 2 mm) are overlapped, and the front end portion of the leaf spring 60 is connected to the front frame 20. The plate is sandwiched between the left and right support plates 62 and 63 and fastened together by bolts and nuts 66 and 66, and the rear end portion of the leaf spring 60 is connected and fixed to the front portion of the rear frame 50. It is sandwiched between a pair of left and right connecting and holding plates 72 and 72 and spacers 74 and 74 and is fastened together by bolts and nuts 76 and 76.

  In this manner, by connecting the front frame 20 and the rear frame 50 via the leaf springs 60 arranged perpendicular to them, the handle 22 can be operated as in the first embodiment. In addition, it is easier and easier to change and correct the direction of travel (trajectory correction) compared to conventional riding grooving machines, and it is not necessary to tilt the machine when changing the direction of travel, so the grooves must be neatly formed. Further, since the front frame 20 and the rear frame 50 are connected by the leaf spring 60, the traveling direction of the grooved plate 14 is the progress of the driving wheel (front wheel) 12 due to the resistance of mud during traveling. Because it automatically adjusts to the direction, even if there is a center line misalignment or angular blur (non-parallel) between the drive wheel (front wheel) 12 and the grooved plate 14 during manufacturing and assembly, At the time required Sex can be ensured.

In addition to this, since the rotating shaft and the bearing are connected by the leaf spring 60, the steering operation (steerability) becomes dull and heavy, so that it is possible to ensure the required straightness and of course rotate them. Compared to the case where the shaft and the bearing are connected to each other, the wheel 12 and the front frame 20 turn only in a very narrow angle range, so that the handling property is improved, and further, the structure is simplified, the weight is reduced, and the cost is reduced. In addition, since there is no rotating sliding part, malfunctions are unlikely to occur, and in addition, the elastic restoring force of the leaf spring also provides a neutral straight position restoration function (self-neutral return function). The property is further improved.
Further, since the leaf spring 60 has a structure in which a plurality of metal plates are overlapped, the spring characteristics of the leaf spring 60 can be easily and easily changed by increasing or decreasing the number of overlapped metal plates.

  In the above embodiment, the gate-shaped steering handle 22 and the operation lever 40 are used. However, the present invention is not limited to this, and as the steering handle and the operation lever, for example, as shown in FIG. The T-shaped steering handle 80 and the operation lever 90 can also be used. The T-shaped steering handle 80 in the illustrated example includes an upper side portion 80A disposed horizontally and a vertical side portion 80B connected and fixed to the center of the lower surface of the upper side portion, and a lower end portion of the vertical side portion 80B. 80b is bent and bent rearward so as to have an L shape, and is joined and fixed to the center of the upper surface of the U-shaped holding plate 88 fixed to the front end of the front frame 20 by welding or the like. (Except for part 80b) is slightly inclined backward.

  On the other hand, the T-shaped operating lever 90 is about half the size of the T-shaped handle 80, and is inclined diagonally in front of the center of the upper side 80A so that it can be operated from the upper side 80A side of the handle 80. And a pair of left and right vertical side portions 90B, 90B disposed on both sides of the vertical side portion 80B of the handle 80, connected and fixed to the center of the lower surface of the upper side portion 90A. The lower end portions of the pair of left and right vertical side portions 90B, 90B of the operation lever 80 are positioned on the side (or rear side) of the vertical side portion 80B of the handle 80 (therefore, the operation lever The vertical side portion 90B of 90 is inclined forward so as to exhibit a V shape in a side view with the vertical side portion 80B of the handle 80).

  Further, at the lower ends of the vertical side portions 90B and 90B, a left side tension arm 91 having a substantially V-shape in side view and one (upper side) side portion 91a of the right side tension arm 92 whose arm length is longer than the left side tension arm 91, respectively. , 92a are fixed by welding or the like. The rounded bottoms of the left tension arm 91 and the right tension arm 92 are connected to a pin 80a laid on a U-shaped support plate 93 that is joined and fixed by welding or the like near the center in the height direction of the handle 22. It is supported so that it can swing. Although not shown in the other side (lower side) 91b of the left tension arm 91, as with the left tension arm 41 (FIGS. 1 and 4) of the above embodiment, a Bowden cable for adjusting the throttle opening. One end of 42 (the inner cable) is not shown on the other (lower) side 92b of the right tension arm 92, but the right tension arm 43 (FIGS. 3 and 4) of the above embodiment is not shown. ), One end of a power transmission connecting / disconnecting Bowden cable 45 (inner cable thereof) is connected via a tension coil spring 44.

  As described above, even when the T-shaped steering handle 80 and the operation lever 90 are used as the steering handle and the operation lever, substantially the same functions and effects as those of the above embodiment can be obtained.

The left view which shows 1st Embodiment of the riding grooving machine which concerns on this invention. The top view of the state which removed the engine etc. of the riding grooving machine shown by FIG. The enlarged right view which shows the principal part of the riding grooving machine shown by FIG. The enlarged front view which shows the principal part of the riding grooving machine shown by FIG. The left view which shows 2nd Embodiment of the riding grooving machine which concerns on this invention. The top view of the state which removed the engine etc. of the riding grooving machine shown by FIG. The other example of the steering handle and operation lever used for the riding grooving machine shown in FIG. 1 and FIG. 5 is shown, (A) is a front view, (B) is a left side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Riding groove machine 12 Drive wheel 14 Groove board 15 Engine 20 Front frame 21 Rotating shaft 22, 80 Steering handle 34 Bearing 40, 90 Operation lever 50 Rear frame 55 Seating seat 60 Leaf spring

Claims (10)

A front frame (20) provided with a driving wheel (12), a driving drive system including an engine (15), and a steering handle (22), a seating seat (55) and a groove plate ( 14) and a rear frame (50), wherein the front frame (20) is steerable in a horizontal plane with respect to the rear frame (50) ,
The operating point (P) of the handle (22) in the front frame (20) is offset forward by a predetermined distance (La) from the turning center (O) of the front frame (20) with respect to the rear frame (50). riding trench wall cutter, characterized in that is. The front frame (20) and the rear frame (50) are rotatably connected in a horizontal plane via a rotation shaft (21) provided on one of them and a bearing (34) provided on the other. The riding grooving machine according to claim 1 , wherein the grooving machine is used. The riding grooving machine according to claim 1 , wherein the front frame (20) and the rear frame (50) are connected to each other via a connecting member (60) that can be elastically bent in a horizontal plane. . The said elastically bendable connection member is comprised by the leaf | plate spring (60) distribute | arranged perpendicularly | vertically with respect to the said front frame (20) and a rear frame (50), The Claim 3 characterized by the above-mentioned. The described riding grooving machine. The riding grooving machine according to claim 4 , wherein the leaf spring (60) has a structure in which a plurality of metal plates are superposed. A single operating lever (40) is commonly used for adjusting the throttle opening of the engine (15) and for connecting / disconnecting power from the engine (15) to the drive wheel (12). The riding grooving machine according to any one of claims 1 to 5 . The riding grooving machine according to claim 6 , wherein both the throttle opening adjustment and the power transmission connection / disconnection can be performed simultaneously by swinging the operation lever (40). When allowed to swing the operating lever (40) in one direction, after the throttle opening degree is somewhat reduced, to claim 6 or 7 wherein the power transmission is characterized in that it is configured to be disconnected The described riding grooving machine. The rider according to any one of claims 6 to 8 , wherein the operation lever (40) has a T shape, a gate shape, or a loop shape, and can be operated with either left or right fingers. Grooving machine. The handle (22) has a T shape, a gate shape, or a loop shape, and a swing fulcrum of the operation lever (40) is provided on the vertical side or the left and right sides of the handle (22). The riding grooving machine according to claim 9 .

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