JP2010035527A - Riding type farm implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple structure riding type farm implement which can prevent that the exhaust gas of an engine is directed to a worker, and can simultaneously change the route of the exhaust gas in a simple structure. <P>SOLUTION: This riding type paddy field furrow opener has a driving wheel 4 rotated with an engine 2, a frame 8 supported on the driving wheel 4, a seat 19 disposed on the frame 8, and a furrow-opening blade 16, and a worker rides on the seat 19 and works. In the riding type implement, the seat 19, the frame 8 and the furrow-opening blade 16 are integrated. The riding type implement has a driving unit 11 integrating the driving wheel 4, reduction gears 3, a transmission shaft pipe 1 in which the transmission shaft is built, the engine 2 and a handle 5. The driving unit 11 is rotatably attached to the frame 8. The engine 2 of the driving unit 11 is disposed behind and below the seat 19. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a riding-type agricultural working machine such as a riding-type paddy grooving machine, a paddy field plowing weeding machine, or a paddy fertilizing machine.

  Conventionally, as a paddy grooving machine, a single riding paddy grooving machine is known (see, for example, Patent Documents 1 and 2). In this riding type paddy grooving machine, an engine and a speed reducer are respectively attached to a rear end portion and a front end portion of a transmission shaft pipe (main body frame) extending in the front-rear direction. The rotational power of the engine is transmitted to the speed reducer via the transmission shaft in the transmission shaft pipe. One driving wheel is attached to the output shaft of the speed reducer. A seat (saddle) and a groove cutting blade (groove cutting plate, groove cutting body) are attached to the transmission shaft pipe via a stay. The seat is provided obliquely above and behind the center of the driving wheel, and the grooving blade (bid plate) is provided obliquely below and behind the seat.

  Then, in order to perform grooving in a field such as paddy fields using this riding type paddy grooving machine, an operator rides over the seat, rotates the driving wheel by the rotational driving force of the engine, and drives this The grooving machine is moved forward by the wheels used for the operation. Then, since the operator's weight is supported by the driving wheel and the grooving blade, the grooving blade is pressurized, the grooving blade is held at a predetermined depth, and the grooving machine advances.

Here, rice planting is performed linearly in the paddy field. However, the linearity may not be maintained due to several factors, and the workability in the grooving work performed along the seedling stock is impaired.
Therefore, it is conceivable to give a steering function to the paddy grooving machine, but the paddy grooving machine has an extremely simple structure in order to reduce the cost, and the wheels are basically arranged in front of the seat. Only one wheel is used.

Therefore, it is not possible to employ a steering mechanism having a simple structure in which a front wheel that is not driven, such as a bicycle or a motorcycle, is directly connected to a steering wheel as a steering wheel.
Therefore, in Patent Document 1, a groove cutting blade and a handle disposed in the mud as the ground on the rear side of the seat are connected to the frame so as to be rotatable about an axis along a substantially vertical direction, respectively. In addition, the handle and the grooving blade are connected by a link mechanism so that the handle and the grooving blade rotate in conjunction with each other.

In addition, the grooving blade is arranged in the state where the rotating shaft is arranged on the front side and the rear part moves to the left and right, when the grooving blade in the mud rotates to the left or right at the rear part of the paddy grooving machine. The resistance to advancing is different on the left and right of the rear part of the advancing paddy grooving machine. And, like the rudder of a ship, when the grooving blade touches the right, the paddy grooving machine turns to the right, and when the grooving blade touches the left, the paddy grooving machine turns to the left.

  Further, in Patent Document 2, a steering wheel, a prime mover, and transmission means for transmitting power from the prime mover to the driving wheel are supported by the front frame, the seat and the grooving blade are supported by the rear frame, and The front frame is rotatably connected to the front side of the rear frame. With such a configuration, even if it is a driving wheel, the driving wheel and the driving source are supported by one front frame, and the driving wheel is steered by making the frame rotatable. Even if it is, the driving wheel, the prime mover, and the transmission means rotate together, so that a complicated configuration that enables rotational movement between the driving wheel and the transmission means is not required, and the front wheels are not driven. A simple steering mechanism can be obtained in substantially the same manner as a bicycle or a motorcycle that steers the vehicle.

Japanese Patent No. 4032109 JP 2008-104425 A

  By the way, in the steering method of steering by swinging the grooving blade to the left and right described in Patent Document 1, the steering wheel does not have a simple structure in which a front wheel is connected to a handle to be rotatable like a bicycle. There is a need for a link mechanism that allows the grooving blades to be rotated around different rotation axes and to rotate these in conjunction with each other. Therefore, the structure of the rice field grooving machine, which was a simple structure, becomes complicated and increases the weight. In addition, the increase in weight impairs operability and ease of handling in a riding-type agricultural machine that may be carried by hand.

In addition, since the link mechanism is arranged so as to reach the grooving blade which is the lower end of the rearmost part of the paddy grooving machine, there is a possibility that the link mechanism buffers the lower limb of a person straddling the saddle, The handling of paddy grooving machines may be deteriorated.
Further, when the handle, the driving wheel, and the driving source thereof are integrated and disposed in front of the seat as described in Patent Document 2, for example, the engine as the driving source is above the wheel axle and from the handle. It is likely to be placed at a lower position. That is, the engine is located at a relatively high position in front of the worker who rides over the saddle of the paddy grooving machine.

  In this case, the exhaust from the engine rises due to the temperature, and the paddy grooving machine may move backward relative to the paddy grooving machine and move toward the operator side. The person inhales the exhaust gas or feels disgusted by the smell of the exhaust gas.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a riding-type agricultural work machine that can be steered with a simple structure and can prevent exhaust from being directed toward an operator.

  In order to achieve the object, a riding-type agricultural work machine according to claim 1 includes a prime mover (2), one drive wheel (4) rotated by the prime mover (2), and the prime mover (2 ) To the driving wheel (4), a transmission means (1, 3), a working part (16) disposed on the ground side, a seat (19), and a handle (5) are provided. In the riding type agricultural work machine, the drive unit (11, 11a, 11b, 11c) in which the driving wheel (4), the handle (5), the transmission means (1, 3) and the prime mover (2) are integrated. A frame (8, 8a, 8b) for connecting the seat (19) and the working unit (16), and the drive unit (11, 11a, 11b, 11c) can be steered by connecting freely The transmission means (1, 3) is arranged along the front-rear direction below the seat (19), and the position of the prime mover (2) connected to the transmission means (1, 3) is set to the seat ( 19) It is characterized by being behind the seat and below the seat (19).

  In the invention described in claim 1, the driving wheel (4), the prime mover (2) and the transmission means (1, 3) for rotationally driving the driving wheel (4) are integrated, In addition, the drive unit (11, 11a, 11b, 11c) is obtained by integrating the handle (5). And this is rotatably attached to the frame (8, 8a, 8b) connecting the seat (19) and the working part (16) (for example, the groove cutting blade (16)), so that the driving wheel (4) Can be rotated integrally with the steering wheel (5) as a steering wheel, and a simple structure similar to a bicycle can be adopted as a steering structure.

Further, the transmission means (1, 3) is arranged along the front-rear direction under the seat, and the prime mover (2) connected to the transmission means (1, 3) is located behind the seat (19) and the seat. (19) By arrange | positioning below, in the riding type agricultural working machine which advances, it can prevent that the exhaust_gas | exhaustion of a motor | power_engine (2) heads to an operator side.
That is, the drive wheel (4), the handle (5), the transmission means (1, 3), and the prime mover (2) are integrated into a drive unit (11, 11a, 11b, 11c) and rotatable for steering. In this case, the prime mover (2) is intentionally separated from the driving wheel (4) and arranged on the lower side behind the seat (19) without making the whole compact, so that the prime mover (2 ) Is behind and below the worker sitting on the seat (19), and the exhaust of the prime mover (2) can be prevented from moving toward the worker.
Note that when the drive unit (11, 11a, 11b) having the drive wheel (4) is rotated integrally to steer the riding-type agricultural work machine, for example, a substantially central portion before and after the drive wheel (4). In addition, there is a method of changing the traveling direction by operating the drive wheel (4) to be rotatable about the rotation axis substantially along the vertical direction and rotating the handle (5) to the left and right.
As another method, a driving wheel (5) is operated by tilting the handle (5) to the left and right with the rotation axis of the drive unit (11c) with respect to the frame (8b) being substantially horizontal instead of vertical. 4) Some tilt the vehicle to the left or right, and the driving wheels (4) tilted to the right or left can steer the traveling direction of the riding agricultural machine from side to side.

  The riding-type agricultural machine according to claim 2 is the invention according to claim 1, wherein the drive unit (11, 11a, 11b) is rotatable about an axis along a substantially vertical direction, and the drive unit (11, 11a, 11b) is provided with a rotation restricting means for restricting the rotation range of the prime mover (2) to a range that is not in front of the seat (19).

In the invention described in claim 2, it is possible to change the traveling direction of the riding-type farm work machine to the left and right by turning the handle (5) to the left and right as described above. Further, when the center of rotation is arranged on the side of the handle (5) and the drive wheel (4), the prime mover (2) behind the seat (19) rotates and moves in a wide range, and the handle (5) For example, there is a risk that the prime mover (2) will be in front of the seat (19), but the rotation restricting means can prevent the prime mover (2) from moving greatly.
Further, if the portion connecting the prime mover (2) and the driving wheel (4) moves greatly, there is a risk of buffering the frame (8, 8a), the operator's foot, etc., so the rotational range is limited to the prime mover (2). It is preferable to restrict the rotation range to a smaller rotation range than the rotation range in which the vehicle moves before the seat (19).

  According to a third aspect of the present invention, the riding-type agricultural machine according to the first aspect of the present invention is characterized in that the drive unit (11c) is rotatable about an axis along a substantially horizontal direction.

  In the invention according to claim 3, it is possible to change the traveling direction of the riding-type agricultural machine to the left and right by tilting the handle (5) to tilt left and right and tilting the driving wheel (4) to the left and right. It becomes. In this case, the prime mover (2) arranged behind the seat (19) does not move greatly to the left and right, but tilts to the left or right, or slightly moves to the left and right while tilting. Even if it is tilted to the left or right, the motor (2) and the part connecting the motor (2) and the driving wheel (4) do not buffer the frame (8b) or the operator's foot. Therefore, the prime mover (2) does not move to the front side of the seat (19). In addition, it is good also as what regulates the rotation range of a drive unit (11c) so that balance may not be lost.

  The riding farm machine according to claim 4 is the invention according to claim 3, wherein the handle (5) is separated from the drive unit (11d) rotatable about an axis along a substantially horizontal direction. The handle (5) is rotatable about an axis along the substantially vertical direction, and the rotation of the handle (5) around the axis along the substantially vertical direction is made around the axis along the substantially horizontal direction of the precursor drive unit (11d). Rotation direction conversion means (9j) for converting the rotation into

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the handle (5) is a substantially horizontal shaft as a part of the drive unit (11c) that is rotatable about the axis along a substantially horizontal direction. Although it is possible to steer by rotating it around and tilting it to the left and right, since steering is performed by tilting only the handle (5) to the left and right, it becomes a different steering feeling from a normal two-wheeled vehicle. By rotating the handle (5) to the left and right around a substantially vertical axis, steering becomes possible, and the steering method is similar to that of a two-wheeled vehicle, and it is easy for a user who uses it for the first time to steer.

  According to the riding type agricultural machine of the present invention, it is possible to realize a steering function for changing the traveling direction of the riding type agricultural machine from left to right with a simple configuration, and by providing such a steering mechanism, It is possible to prevent the exhaust from going to the worker side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 (a) and 1 (b) are views showing a riding paddy grooving machine as a riding agricultural machine according to the first embodiment of the present invention, and FIG. Fig. 1 (b) is a side view. In FIG. 1B, a part of a driving wheel 4 described later, a reduction gear 3, an output shaft 3a, a front outer cylinder pipe 6, a rotating inner cylinder pipe 7, a part of a handle support pipe 9, and the like are illustrated. The other illustrations of the engine 2, the seat 19, the grooving blade 16, and the like are omitted.
Also, in FIG. 3B and FIG. 4B described later, a part of the illustration is omitted in a similar manner.

  This riding-type paddy grooving machine (riding-type agricultural working machine) includes a transmission shaft pipe 1 that is slightly higher on the rear side and extends obliquely in the front-rear direction. An engine (prime mover) 2 and a speed reducer 3 are attached to the rear end portion and the front end portion of the transmission shaft pipe 1, respectively. The rotational power of the engine 2 is transmitted to the speed reducer 3 via a transmission shaft (not shown) in the transmission shaft pipe 1.

  The transmission shaft pipe 1, the transmission shaft in the transmission shaft pipe 1, and the speed reducer 3 constitute transmission means. An output shaft (drive shaft) 3a of the speed reducer 3 protrudes horizontally from the case of the speed reducer 3 to the right in the traveling direction (right side when viewed from the rear side), and the drive wheel 4 is 1 on the output shaft 3a. One is attached. The output shaft 3a also serves as the axle of the driving wheel 4. This driving wheel 4 is rotationally driven by the rotational power from the engine 2 that is decelerated and transmitted via the speed reducer 3.

  Further, with the above-described configuration, the driving wheel 4 is supported in a cantilevered state at the speed reducer 3 portion. In this example, the handle 5 is connected to the driving wheel 4 and the rotating inner pipe 7 that is rotatably supported by the front outer pipe 6 is linearly provided along the vertical direction with the output shaft 3a. Since it is connected to the case and the driving wheel 4 is in a cantilever state, the portion that supports the driving wheel 4 so as to be rotatable to the left and right is very simple. However, as will be described later, the rotational center of rotation of the driving wheel 4 to the left and right is eccentric to the left side in the traveling direction with respect to the front, rear, left and right centers of the driving wheel 4.

A rotating inner pipe 7 that extends upward in the vertical direction is attached to the upper portion of the speed reducer 3. This rotating inner cylinder pipe 7 is inserted in a state where it is coaxially arranged in a front outer cylinder pipe 6 which becomes a part of a frame 8 described later. The rotating inner pipe 7 is inserted into the front outer pipe 6 so as to be rotatable around the axial direction of these pipes. Therefore, the rotating inner pipe 7 is rotatable around the central axis along the vertical direction.
Further, for example, a bearing is disposed between the front outer cylinder pipe 6 and the rotating inner cylinder pipe 7, and the rotating inner cylinder pipe 7 moves along the axial direction with respect to the front outer cylinder pipe 6. It is regulated.

Note that the axial directions of the front outer pipe 6 and the rotating inner pipe 7 do not have to be completely along the vertical direction, and may slightly deviate from the vertical direction by tilting forward or backward. Further, in this example, the speed reducer 3 is arranged at a position eccentric to the left in the traveling direction with respect to the driving wheel 4, and the rotating inner pipe 7 rising upward from the speed reducer 3, and the rotating inner pipe 7 Similarly, the front outer cylinder pipe 6 into which is inserted is disposed at a position eccentric with respect to the driving wheel 4.
In addition, the rotating inner pipe 7 and the front outer pipe 6 are arranged at the center in the front-rear direction of the driving wheel 4, but the left-right direction is eccentric as described above, and is arranged on the left side in the traveling direction from the center. As will be described later, the rotation shaft when the driving wheel 4 is rotated left and right for steering is offset (eccentric) to the left with respect to the driving wheel 4.

  A handle support pipe 9 is attached to the upper end portion of the rotating inner pipe 7 in a tilted state. An attachment pipe 9a that protrudes to the left in the direction of travel is connected to the base end of the handle support pipe 9. Two attachment plates 9b and 9b are joined to the portion of the attachment pipe 9a that protrudes to the left. The rotating inner pipe 7 is fastened to the two mounting plates 9b, 9b by bolts with the upper end of the rotating inner pipe 7 sandwiched between the two left and right mounting plates 9b, 9b. It has become.

By being connected to the rotating inner pipe 7 that is eccentric to the left in the direction of travel with respect to the driving wheel 4 via the attachment pipe 9 a, the handle support pipe 9 is located at substantially the left and right centers of the driving wheel 4. Be placed.
And the handle | steering-wheel 5 which consists of a pipe extended horizontally to right and left is attached to the upper end part of this handle | steering-wheel support pipe 9 as follows.
That is, the support fitting 10 is fixed near the upper end portion of the handle support pipe 9, and the handle 5 is fixed to the support fitting 10.

  A throttle lever (not shown) is attached to the handle 5, and the throttle opening of the engine 2, that is, the output of the engine 2 is adjusted by this throttle lever. Further, a stop switch (not shown) is attached to the handle 5, and the current flow to the spark plug of the engine 2 is short-circuited by the stop switch to stop the driving of the engine 2.

  With the above configuration, the drive wheel 4, the reduction gear 3 including the output shaft 3 a serving as the axle of the drive wheel 4, the transmission shaft pipe 1 of the reduction gear 3 and the engine 2 connected via the transmission shaft, the reduction gear A rotating inner pipe 7 connected to the machine 3, a handle support pipe 9 connected to the rotating inner pipe 7, and a handle 5 connected to the handle support pipe 9 are integrated to form a drive unit 11.

Further, an upper frame pipe 13 extending backward from the upper end portion of the front outer cylinder pipe 6 is connected to the front outer cylinder pipe 6, and a lower frame pipe 14 extending rearward from the lower end portion of the front outer cylinder pipe 6 is provided. It is connected.
The rear end portion of the upper frame pipe 13 and the rear end portion of the lower frame pipe 14 are respectively connected to the upper and lower end portions of the rear frame pipe 15 extending vertically therebetween.
Thus, a rectangular frame 8 that is long in the front-rear direction is constituted by the front outer cylinder pipe 6 that extends vertically on the front side, the upper frame pipe 13, the lower frame pipe 14, and the rear frame pipe 15.
The frame 8 is connected to the right side of the frame 8 with an oblique frame pipe 17 for fixing a grooving blade (bide plate) 16 as a kind of working portion.

  The upper end of the oblique frame pipe 17 is connected to the right side of the central part of the upper frame pipe 13, and the central part is connected to the right side of the joint between the rear end part of the lower frame pipe 14 and the lower end part of the rear frame pipe 15. It extends rearward and obliquely downward with an inclination of about 45 degrees. The height position of the rear end portion of the oblique frame pipe 17 is slightly below the center height position of the driving wheel 4. And the attachment member 16a provided in the front-end part upper part of the groove cutting blade 16 is attached to the lower end part of the diagonal frame pipe 17. As shown in FIG. The groove cutting blade 16 is attached so as to be inclined so that the front end side is higher than the rear end side. The height and inclination angle of the grooving blade 16 can be changed by changing the mounting position of the grooving blade 16. Note that the lower end portion of the grooving blade 16 is slightly lower than the height position of the lower end portion of the driving wheel 4. The center part in the left-right direction of the grooving blade 16 coincides with the center part in the left-right direction of a seat 19 described later.

  On the upper side of the frame 8, a seat (saddle) 19 having a substantially rectangular plate shape that is vertically long and having a cushion arranged at the top is attached as follows. In other words, a rectangular frame-shaped square frame 21 is fixed to the upper frame pipe 13 of the frame 8, and a mounting plate that extends downward to the left and right of the front side 19 and to one central part of the rear side is provided at the lower part of the seat 19. 19a and 19a are fixed, and these mounting plates 19a and 19a are respectively fixed to the front left and right and rear central portions of the square frame 21 by bolts. A plurality of mounting holes are formed in the mounting plates 19a and 19a at intervals in the vertical direction, and the mounting height of the seat 19 can be changed by selecting the position of the mounting hole into which the bolt is inserted. It is like that.

  The rectangular frame 21 is fixed to the upper frame pipe 13 at a portion extending horizontally in the front-rear direction on the left side in the traveling direction. Therefore, the square frame 21 is located on the right side in the traveling direction from the frame 8 extending vertically along the front-rear direction. It sticks out horizontally. The front outer cylinder pipe 6, the upper frame pipe 13, the lower frame pipe 14, and the rear frame pipe 15 of the frame 8 are on the left side in the traveling direction of the driving wheel 4, and the seat 19 travels with respect to the upper frame pipe 13. By projecting to the right side, the left and right centers of the driving wheel 4 and the left and right centers of the seat 19 can be brought closer to each other. The seat 19 is located obliquely above and behind the driving wheel 4.

With the above configuration, the seat 19 and the grooving blade 16 are integrally joined by the frame 8 to constitute the main unit 20.
And the main body unit 20 and the drive unit 11 were connected by the rotation inner cylinder pipe 7 of the drive unit 11 penetrating vertically into the front outer cylinder pipe 6 of the frame 8 of the main body unit 20. It is in a state.
In this state, the engine 2 at the rear end of the transmission shaft pipe 1 is behind the seat 19 and below the seat 19.
Here, when the handle 5 is rotated to the left and right in a substantially horizontal state, the direction orthogonal to the output shaft 3a as the axle of the driving wheel 4 changes to the left and right, and the rolling of the driving wheel 4 The direction is changed, and the traveling direction of the riding farm machine is changed.

Here, each member of the main body unit 20 and each member of the drive unit 11 are arranged in the center of the driving wheel 4, the rotating inner pipe 7 at the center of the front and rear of the driving wheel 4, and the rotating inner cylinder. The handle support pipe 9 and the handle 5 that are tilted forward and extended upward from the pipe 7 are arranged in front of the seat 19, and the handle support pipe 9 extends upward from the height position of the seat 19. 5 is arranged above the seat.
Further, the driving wheel 4 and the rotating inner pipe 7 are arranged below the seat 19.

Further, since the frame 8 is in a state where the rotating inner cylinder pipe 7 is inserted into the front outer cylinder pipe 6, the front outer cylinder pipe 6 serving as the front end portion of the frame 8 is above the upper and lower central portions of the driving wheel 4. Thus, it is arranged in a state extending upward from a position above the speed reducer 3 and is arranged at the front and rear central portions of the driving wheel 4.
The frame 8 is disposed above the height position of the upper end portion of the driving wheel 4 and is extended rearward from the front and rear central portions of the driving wheel 4, and the rear end portion is It is behind the rear end of the driving wheel 4.

Further, the transmission shaft pipe 1 extending obliquely rearward and upward from the speed reducer 3 disposed at the upper and lower and front and rear central portions of the driving wheel 4 is disposed below the frame 8 excluding the oblique frame pipe 17, and the oblique frame. The frame 8 except the pipe 17 is not buffered.
Further, the transmission shaft pipe 1 is disposed at a position where the front side of the engine 2 at the rear end portion is buffered with the oblique frame pipe 17.

Here, the transmission shaft pipe 1 is arranged on the left side in the traveling direction, and substantially in the left-right position coincides with the frame 8 excluding the oblique frame pipe 17, but the oblique frame pipe 17 corresponds to the frame 8 excluding the oblique frame pipe 17. The transmission shaft pipe 1 on the left side of the traveling direction and the oblique frame pipe 17 are arranged on the right and left sides of the traveling direction.
Therefore, when the driving wheel 4 is rotated left and right at the middle part before and after the operation of the handle 5, the transmission shaft pipe 1 also swings left and right. However, when the handle 5 is moved to the left in the traveling direction, The driving wheel 4 can be rotated to the left in the traveling direction until the transmission shaft pipe 1 hits the oblique frame pipe 17.

Further, when the handle 5 is cut to the right in the traveling direction, the transmission shaft pipe 1 is not buffered by the oblique frame pipe 17 and can be rotated 180 degrees or more.
In such a state, when the handle 5 is turned to the left in the traveling direction, the transmission shaft pipe 1 may hit the oblique frame pipe 17 and cause an impact.
Further, when the handle 5 is cut more than necessary on the right side in the traveling direction, the transmission shaft pipe 1 hits the lower limb of the worker riding the riding type farm work machine, or the engine 2 is from the seat 19 (worker). There is a possibility of going forward.

Therefore, the riding-type farm work machine is provided with a rotation restricting means (not shown) for restricting the rotation range of the drive unit including the handle.
As shown in FIG. 2, the rotation restricting means of this example is provided in the front outer cylinder pipe 6 with a long left and right elongated hole 61 and the rotation inner cylinder pipe 7. It is provided with a protrusion 71 that protrudes from the outer peripheral surface into the elongated hole 61 of the front outer cylindrical pipe 6 and can move left and right within the elongated hole 61 within the range of the elongated hole 61.

  Here, when the protrusion 5 moves to the right end or the left end of the long hole 61 when the handle 5 is turned and the rotating inner pipe 7 rotates together with the handle 5, the drive unit can no longer move to the right or left. 11 rotation ranges are regulated. At this time, the restriction range is a state in which the engine 2 does not rotate before the seat 19, but it is preferable to restrict the rotation within a smaller rotation range, for example, when the drive unit 11 is turned to the left in the traveling direction. In addition, when the transmission shaft pipe 1 is regulated at an angle slightly before the contact with the oblique frame pipe 17 that supports the groove cutting blade 16 as the working portion, and the drive unit 11 is turned to the right in the traveling direction, It is preferable to restrict the rotation so that the rotation is suppressed at the same angle to the left in the opposite direction and the angle that restricts the rotation to the right.

As a result, the engine 2 does not come before the worker sitting on the seat 19, and the transmission shaft pipe 1 does not hit the lower limb of the worker sitting on the seat 19. Further, it is possible to prevent the transmission shaft pipe 1 from hitting the oblique frame pipe 17.
The rotation restricting means is not limited to the above-described one. For example, the rotation restricting means is a U-shaped restricting member extending from the lower side of the frame 8 to the lower transmission shaft pipe 1, and the transmission shaft pipe 1 is The transmission shaft pipe 1 may be restricted to a state in which the transmission shaft pipe 1 can be rotated to the left and right by the interval between the U-shaped members, or the rotation range of the handle support pipe 9 may be restricted. It may be a member.
According to the riding type farm working machine as described above, the exhaust of the engine 2 can be prevented from going to the worker, and the simple configuration of simply rotating the inner cylinder in the outer cylinder similar to a bicycle, The driving wheel having the driving force transmission means can be easily turned left and right to change the course.

FIGS. 3A and 3B are views showing a riding paddy grooving machine as a riding farm machine according to the second embodiment of the present invention, and FIG. FIG. 3B is a side view.
The riding farm machine according to the second embodiment is the riding farm machine according to the first embodiment, in which the driving wheel is cantilevered and the left and right rotation centers of the driving wheel are on the left side in the traveling direction. The driving wheel is supported by both ends, and the left and right rotation centers of the driving wheel are arranged at the left and right front and rear centers of the driving wheel.

  In the second embodiment, the basic configuration is the same as in the first embodiment, but the change in the shape of the frame and the shape of the front outer cylinder pipe constituting the frame, the shape of the rotating inner cylinder pipe, Although the rotating inner pipe portion is changed to a shape like a bicycle front fork, other components are basically the same as those in the first embodiment. Constituent elements similar to those of the first embodiment are denoted by the same reference numerals as in the first embodiment in FIGS. 3A and 3B, and description thereof is omitted.

In the second embodiment, the vertical length of the front outer pipe 6a constituting the front end of the frame 8a is shortened. Moreover, the height position of the upper end part of the front outer cylinder pipe 6a is the same as that of 1st Embodiment, and the height position of a lower end part is made higher than the case of 1st Embodiment.
In the frame 8a, the front outer cylinder pipe 6a is connected to a front end portion of an upper oblique frame pipe 17b extending obliquely rearward and downward. And the front-end part of the upper frame pipe 13a extended toward back substantially horizontally from the position slightly behind the upper end part of the upper side diagonal frame pipe 17b is connected. Further, a rear frame pipe 15a extending vertically is bridged between a rear end portion of the upper oblique frame pipe 17b and a rear end portion of the upper frame pipe 13a.

Therefore, the frame 8a has a substantially rectangular frame shape in the first embodiment, but has a right triangle frame shape in which the lower side is slanted. The seat 19 is attached via the square frame 21 as in the first embodiment, but in this example, the upper frame pipe 13a is disposed at the approximate center of the left and right, so the left and right center of the seat 19 and the frame 8a The square frame 21 is connected to the upper frame pipe 13a so that the approximate center of the upper frame pipe 13a coincides.
In addition, a lower oblique frame pipe 17a to which the groove cutting blade 16 is attached to the lower end portion is connected to the lower side of the upper oblique frame pipe 17b. The frame 8a, the seat 19, and the grooving blade 16 constitute a main unit 20a.

  In the drive unit 11a, the vertical length of the rotating inner cylinder pipe 7a is shortened corresponding to the length of the front outer cylinder pipe 6a, and an inverted U-shaped fork pipe 7b is connected thereunder. . The fork pipe 7b has two fork portions 7c and 7d extending vertically on the left and right sides, and a connecting portion 7e extending to the left and right connecting the upper ends of the fork portions 7c and 7d. And the center part of the right and left of the connection part 7e is connected to the rotation inner cylinder pipe 7a.

  The left fork portion 7 c of the left and right fork portions 7 c and 7 d is connected to the speed reducer 3. The fork portion 7d on the right side in the traveling direction is longer than the left fork portion 7c and further extends downward. The left side surface of the lower end portion of the fork portion 7d on the right side in the traveling direction is an output shaft that extends horizontally from the speed reducer 3 to the right side and is fixed to the driving wheel 4 and penetrates the driving wheel 4. A bearing 3c that rotatably supports the tip of 3a is provided.

With the configuration as described above, the rotation center of the driving wheel 4 coincides with the front, rear, left and right centers of the driving wheel 4 and the driving wheel 4 is held in both states, so that the rigidity of the riding farm machine is increased. Can be increased. However, the weight and cost may be higher than in the first embodiment.
4 (a) and 4 (b) are diagrams showing a riding paddy grooving machine as a riding agricultural machine according to the third embodiment of the present invention, and FIG. FIG. 4B is a side view.

  The riding farm machine according to the third embodiment is the same as the first embodiment in a state where there is no fork portion 7d on the right side in the traveling direction of the fork pipe 7b in the riding farm machine according to the second embodiment. Further, the driving wheel 4 is cantilevered. However, in the first embodiment, the rotation center when the driving wheel 4 is rotated to the left and right is shifted left and right from the front, rear, left and right centers of the driving wheel. In the embodiment, the basic shape is the same as that of the second embodiment, and the center of rotation of the driving wheel 4 to the left and right coincides with the center of the front, rear, left and right of the driving wheel 4. .

  The configuration except for the fork portion 7d on the right side of the fork pipe 7b in the traveling direction and the bearing 3c provided at the lower end of the fork portion 7d is basically the same as that of the second embodiment. Components similar to those of the second embodiment are denoted by the same reference numerals as those of the second embodiment in FIGS. 4A and 4B, and description thereof is omitted. In addition, the part of 3rd Embodiment in which description is abbreviate | omitted also in 2nd Embodiment is the same as that of 1st Embodiment.

In the third embodiment, the fork pipe 7f has a shape in which the fork portion 7d on the right side in the traveling direction is eliminated from the fork pipe 7b of the second embodiment as described above. Accordingly, the fork pipe 7f extends leftward from the lower end of the short rotating inner pipe 7a and then bends and extends downward. Here, the drive unit 11b including the fork pipe 7f is the same as the drive unit 11a of the second embodiment except for the fork pipe 7f.
Thereby, the driving wheel 4 is cantilevered and can be lighter than the riding farm work machine of the second embodiment. Further, since the center of rotation of the driving wheel 4 is not eccentric than in the case of the first embodiment, the balance is more excellent.

FIG. 5 is a side view showing a riding type paddy grooving machine as a riding type farm working machine according to a fourth embodiment of the present invention.
The riding farm machine according to the fourth embodiment is such that the farm machine according to the first embodiment rotates the driving wheel 4 left and right, that is, the driving wheel around the rotation axis substantially along the vertical direction. The steering wheel 4 has been provided with a steering function for changing the traveling direction by turning left and right, whereas the driving wheel 4 is tilted to the left and right, that is, the driving wheel around the rotation axis substantially in the horizontal direction. By turning 4, the steering function for changing the traveling direction is given.

In the fourth embodiment, the basic main components are the same as those in the first embodiment, but the rotation axis when rotating the drive unit 11c is changed from a substantially vertical state to a substantially horizontal state. Therefore, the same structure as in the first embodiment is denoted by the same reference numerals as in the first embodiment in FIGS. 5 (a) and 5 (b). Therefore, the explanation is omitted or simplified.
In the fourth embodiment, the drive unit 11c does not include the rotating inner pipe 7a of the first embodiment. Instead, the handle support pipe 9d extends from the attachment position of the handle 5 to the reduction gear 3 below. It extends and is connected to the speed reducer 3.

  In this example, the lower end of the handle support pipe 9d is connected to the speed reducer 3 and has two bent portions 9f and 9g at the upper and lower portions, and the portion from the speed reducer 3 to the lower bent portion 9f is in the vertical direction. From the lower bent portion 9f to the upper bent portion 9g is inclined to the right and the upper bent portion 9g to the upper end is again along the vertical direction.

The reduction gear 3, the transmission shaft pipe 1a, the transmission shaft, and the engine 2 have basically the same configuration as that of the first embodiment, but the transmission shaft pipe 1a is a lower outer cylinder frame of the frame 8b. The pipe 14a is inserted so as to be coaxial with the lower outer cylinder frame pipe 14a and is disposed in a penetrating state. The transmission shaft pipe 1a is rotatable so as to be tilted left and right within the substantially horizontal lower outer cylinder frame pipe 14a. The lower outer cylinder frame pipe 14a and the transmission shaft pipe 1a are arranged in a state of extending rearward and obliquely upward.
The frame 8b includes a horizontal upper frame pipe 13b, a front frame pipe 6d extending downward from the front end of the upper frame pipe 13b, and a rear extending downward from the rear end of the upper frame pipe 13b. And a frame pipe 15b.

The lower end of the front frame pipe 6d is connected to the front end of the lower outer cylinder frame pipe 14a, and the lower end of the rear frame pipe 15b is connected to the rear end of the lower outer cylinder frame pipe 14a.
Also, a first diagonal frame pipe 17c is arranged from the upper and lower center portions of the front frame pipe 6d to a position in front of the rear frame pipe 15b at the rear end of the lower outer cylinder frame pipe 14a, A second oblique frame pipe 17d is connected from the end toward the rear obliquely downward. And the groove cutting blade 16 is attached to the 2nd diagonal frame pipe 17d similarly to the case of the diagonal frame pipe 17 of 1st Embodiment.

Further, the seat 19 is attached to the upper frame pipe 13b via the square frame 21 as in the first embodiment.
Therefore, also in the fourth embodiment, the seat 19 and the grooving blade 16 as the working part are integrally joined by the frame 8b, and the main unit 20b is configured from these.
And it is set as the state which inserted the pipe 1a for transmission shafts in the lower outer cylinder flame | frame pipe 14a rotatably via a bearing. The transmission shaft pipe 1a is restricted from moving in the axial direction in the lower outer cylinder frame pipe 14a, and can only rotate.

According to the riding type agricultural working machine of the fourth embodiment having such a configuration, the driving wheel 4 is tilted to the left or right by rotating the handle 5 so as to be tilted left or right.
At this time, if the driving wheel 4 is tilted to the left in the traveling direction, the traveling direction can be changed to the left corresponding to the inclined driving wheel 4, and the traveling direction can be changed to the right by operating in reverse. Yes, the steering function is given.

  In the case of the fourth embodiment, the operation amount of the handle 5 may be larger than that in the case of the first to third embodiments. The front-rear position of the engine 2 does not change, and the transmission shaft pipe 1a does not buffer the lower limbs of the worker on the seat 19. That is, in the drive unit 11c, the vertically long part from the drive wheel 4 to the handle 5 moves greatly to the left and right and tilts, but the position of the engine 2 and the transmission shaft pipe 1a can be greatly changed to the left and right. Absent. In particular, since the transmission shaft pipe 1a only rotates about its axis, the position does not change from side to side only by rotating. Therefore, it is not necessary to restrict the rotation range to be small. In order to prevent excessive operation, the rotation range may be restricted by the same method as in the first embodiment.

  In the fourth embodiment, the driving wheel 4 is cantilevered. However, as in the second embodiment, the driving wheel may be supported by using an inverted U-shaped fork pipe 7b. .

FIG. 6 is a side view showing a riding paddy grooving machine as a riding agricultural machine according to a fifth embodiment of the present invention.
In the riding farm machine of the fifth embodiment, the handle support pipe 9d of the farm work base of the fourth embodiment is a part slightly above the bent part 9g, and the lower wheel inclination operation pipe 9h. The upper handle post 9i is separated and interlocked with each other. Except for the portion from the handle 5 to the speed reducer 3, the configuration is basically the same as that of the fourth embodiment. The configuration similar to that of the fourth embodiment is shown in FIG. The same reference numerals as those in the fourth embodiment are given and the description thereof is omitted.

In this example, the handle 5 is connected to the upper end of a straight tubular handle post 9i by a support fitting 10.
The handle post 9i is supported by a post rotation support member 19b provided on the front side of the seat 19 so as to be rotatable about the axial direction of the handle post 9i.
The post rotation support member 19b is fixed to the entire surface of the seat 19, supports the handle post 9i as a bearing so as to be rotatable within a predetermined angle range, and is rotatable while the handle post 9i is prevented from coming off. . The handle post 9i can rotate integrally with the handle 5 fixed to the handle post 9i by the support fitting 10.

The handle post 9i is in a state in which the axial direction thereof is slightly inclined forward with respect to the vertical direction, but is substantially along the vertical direction, and the axial direction of the handle post 9i is integrated with the handle post 9i. The handle 5 that rotates around is rotatable about an axis along a substantially vertical direction.
A fork 9j having two rod-like members extending forward is fixed to the lower end portion of the handle post 9i, and the fork 9j is provided so as to be rotatable integrally with the handle post 9i.

In addition, the front-rear position of the handle post 9i is behind the upper end portion in a state where the handle post 9i is bent to the right side of the wheel tilt operation pipe 9h and extends upward again. And the front-end | tip part of the fork 9j has become the front-back position of the wheel inclination operation pipe 9h, and the upper end part of the wheel inclination operation pipe 9h had play between the two rod-shaped members extended to the front side of the fork 9j. It is in a state sandwiched between states.
The wheel tilting operation pipe 9h basically has the same configuration as the part slightly above the bent part on the handle support pipe 9d of the fourth embodiment. The upper end portion of the wheel tilting operation pipe 9h that is inclined rightward to the bent portion 9g and is above the upper bent portion 9g is substantially in the vertical direction without being inclined rightward, but is slightly inclined forward. ing.

  The upper end portion is sandwiched between the forks 9j as described above. The wheel tilting operation pipe 9h is included in the drive unit 11d. The drive unit 11d is obtained by removing the handle 5 and the handle support pipe 9d from the drive unit 11c of the fourth embodiment, and adding a wheel tilt operation pipe 9h instead. Similarly to the drive unit 11c, the drive unit 11d can rotate so that the transmission shaft pipe 1a tilts to the left and right within the substantially horizontal lower outer cylinder frame pipe 14a. It can be rotated.

  According to the riding type paddy grooving machine of the fifth embodiment as described above, steering can be performed by tilting the drive wheel 4 to the left or right integrally with the drive unit 11d as in the fourth embodiment. It becomes possible. At this time, instead of tilting the driving wheel 4 by tilting the handle 5 included in the drive unit 11c to the left or right as in the fourth embodiment, the handle 5 separated from the drive unit 11d is made substantially vertical. By rotating left or right about the axis along the direction, the fork 9j as the rotation direction converting means is integrally rotated to either the left or right, and is sandwiched with play at the tip of the fork 9j. The wheel tilting operation pipe 9h in the state is tilted left or right together with the drive unit 11d including the wheel tilting operation pipe 9h and the driving wheel 4.

Thus, when the handle 5 is turned to the right, the driving wheel 4 is tilted to the right and the traveling direction of the riding paddy grooving machine is turned to the right. When the handle 5 is turned to the left, the driving wheel 4 is tilted to the left. The traveling direction of the riding paddy grooving machine turns to the left.
As described above, the steering operation does not tilt the handle 5 left and right as in the fourth embodiment, but operates to rotate left and right, that is, close to the handle operation of a motorcycle. Steering can be easily performed even by a user who is not familiar with the operation of the agricultural machine.

  In the above-described embodiment, the case where the present invention is applied to a riding-type paddy grooving machine has been described. However, the present invention is not limited to this, and the present invention is not limited to this. Can be applied. In this case, the grooving blade as the working part is replaced with a weeding part or a fertilizing part.

It is a figure which shows the riding type paddy field grooving machine which concerns on the 1st Embodiment of this invention, Comprising: (a) is a principal part front view, (b) is a side view. It is a perspective view which shows the rotation control means of the said riding paddy groove machine. It is a figure which shows the riding type paddy field grooving machine which concerns on the 2nd Embodiment of this invention, Comprising: (a) is a principal part front view, (b) is a side view. It is a figure which shows the riding type paddy field grooving machine which concerns on the 3rd Embodiment of this invention, Comprising: (a) is a principal part front view, (b) is a side view. It is a side view which shows the riding type paddy field grooving machine which concerns on the 4th Embodiment of this invention. It is a side view which shows the riding type paddy field grooving machine which concerns on the 5th Embodiment of this invention.

Explanation of symbols

1 Transmission shaft pipe (transmission means)
2 Engine (motor)
3 Reducer (Transmission means)
4 Driving Wheel 5 Handle 8 Frame 8a Frame 8b Frame 9j Fork (Rotation Direction Conversion Means)
DESCRIPTION OF SYMBOLS 11 Drive unit 11a Drive unit 11b Drive unit 11c Drive unit 11d Drive unit 16 Groove cutting edge (working part)
19 Seat 61 Slotted hole (rotation restricting means)
71 Protrusion (rotation restricting means)

Claims (4)

A prime mover (2), one drive wheel (4) that is rotationally driven by the prime mover (2), and transmission means (1, 3) for transmitting drive force from the prime mover (2) to the drive wheel (4) ), A working unit (16) disposed on the ground side, a seat (19), and a riding type agricultural work machine including a handle (5),
A drive unit (11, 11a, 11b, 11c) in which the drive wheel (4), the handle (5), the transmission means (1, 3) and the prime mover (2) are integrated, and the seat (19) And a frame (8, 8a, 8b) for connecting the working unit (16),
The drive unit (11, 11a, 11b, 11c) is rotatably connected to the frame (8, 8a, 8b) to enable steering,
The transmission means (1, 3) is arranged along the front-rear direction under the seat (19),
A riding-type agricultural work machine characterized in that the position of the prime mover (2) connected to the transmission means (1, 3) is set behind the seat (19) and below the seat (19). The drive unit (11, 11a, 11b) is rotatable about an axis along a substantially vertical direction,
And the rotation control means which controls the rotation range of the said drive unit (11,11a, 11b) below to the range in which the said motor | power_engine (2) does not become ahead of the said seat (19) is provided. The riding type agricultural working machine described.   The riding type agricultural work machine according to claim 1, wherein the drive unit (11c) is rotatable about an axis along a substantially horizontal direction. Separating the handle (5) from the drive unit (11d) rotatable about an axis along a substantially horizontal direction and making the handle (5) rotatable about an axis along a substantially vertical direction;
Rotation direction conversion means (9j) for converting rotation around the axis along the substantially vertical direction of the handle (5) into rotation around the axis along the substantially horizontal direction of the precursor drive unit (11d) is provided. The riding type agricultural working machine according to claim 3.

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