JP2021161838A - Ride-grooving machine - Google Patents

Abstract

To provide a ride-grooving machine capable of maintaining stable straightness by easily return a steering wheel to the neutral position.SOLUTION: When a handle shaft 2 of a handle 1, which is rotatably connected to a main body frame 9 having a seat 12, is rotated from the neutral position on the center of rotation, elastic bodies 25a, 25b connecting the handle shaft 2 and a rotating bracket 31, which is rotatably connected to the body frame 9, pull the rotating bracket 31 and handle shaft 2 each other so as to orient the neutral position.SELECTED DRAWING: Figure 1

Description

The present invention relates to a passenger grooving machine.

Conventionally, a riding grooving machine that cuts a groove in a field in order to quickly drain the field (paddy field) has been known. In this passenger grooving machine, an operator sits on a seat provided in the main body frame, and while traveling by rotating wheels driven by an engine, a grooving portion at the rear of the main body frame cuts a groove in a field. Is. The following Patent Document 1 describes one in which the wheels are steered and the traveling direction is changed by operating the steering wheel by an operator.

Patent No. 4032109

However, in the passenger grooving machine described in Patent Document 1, when the steering wheel is turned or the steering wheel is taken off, the steering wheel is moved to the neutral position (neutral position around the center of rotation of the steering wheel; straight-ahead position). It may be difficult to return it depending on the field, and it is difficult to maintain stable straightness, and improvement is required.

The present invention has been made to solve such a problem, and provides a passenger grooving machine capable of easily returning the steering wheel for wheel steering to a neutral position and maintaining stable straightness. With the goal.

In the passenger grooving machine (100) according to the present invention, an operator sits on a seat (12) provided on a main body frame (9) and cuts a groove by a grooving portion (7) while proceeding by rotation of a wheel (6). In the passenger grooving machine (100), the handle shaft (2) of the handle (1) for steering the wheels (6) is rotatably connected to the main body frame (9) and rotated with respect to the main body frame (9). The bracket (31) is rotatably connected, and the handle shaft (2) and the rotary bracket (31) are pulled toward each other so that the handle shaft (2) and the rotary bracket (31) are oriented toward a neutral position around the center of rotation. It is characterized in that it is connected via an elastic body (25a, 25b).

According to such a passenger grooving machine (100), the handle shaft (2) of the handle (1) rotatably connected to the main body frame (9) having the seat (12) is cut from the neutral position. In this case, the rotating bracket (31) and the handle shaft (2) are formed by the elastic bodies (25a, 25b) that connect the rotating bracket 31 rotatably connected to the main body frame (9) and the handle shaft (2). Since the handles (1) are attracted to each other toward the neutral position, the handle (1) can be easily returned to the neutral position, and stable straightness can be maintained.

Here, if the elastic bodies (25a, 25b) are provided on both the left and right sides of a straight line connecting the rotation axes of the handle shaft (2) and the rotation bracket (31) in a plan view, the handle (1) is provided. The handle (1) is easily returned to the neutral position regardless of whether it is cut to the left or right.

Further, the handle shaft (2) is connected to the front part of the main body frame (9), the rotating bracket (31) is connected to the rear part of the main body frame (9), and the grooving portion (31) is connected to the rotating bracket (31). When 7) is fixed, the phase in which the handle shaft (2) is rotated and the phase in which the grooving portion is rotated can be made opposite to each other, and the wheel (6) and the grooving portion (7) are in opposite directions. Because it faces, the turning radius and inner ring difference can be reduced, and a small turn can be used.

Here, as a configuration that preferably exerts the above action, specifically, the driving force of the prime mover (15) that gives the driving force to the wheel (6) and the driving force of the prime mover (15) are applied to the handle shaft (2). A transmission shaft is connected to the wheel (6), the prime mover (15) is arranged behind the seat (12), and the transmission shaft passes from the wheel (6) under the seat (12) to the prime mover. The elastic bodies (25a, 25b) arranged so as to reach (15) include a configuration provided between the transmission shaft accommodating pipe (13) accommodating the transmission shaft and the rotating bracket (31).

Further, if the handle shaft rotation range regulating means (17) for regulating the rotation range of the handle shaft (2) is provided, the rotation range of the handle (1) is restricted, so that the parts due to excessive cutting of the handle (1) are provided. Interference with and unnecessary load can be suppressed.

As described above, according to the present invention, it is possible to provide a passenger grooving machine in which the handle can be easily returned to the neutral position and stable straightness can be maintained.

It is a side view which shows the passenger grooving machine which concerns on embodiment of this invention. It is a schematic perspective view which looked at the passenger grooving machine shown in FIG. 1 from the rear upper side. It is a vertical cross-sectional view which shows the handle, the handle shaft, and the handle shaft rotation range regulation means in FIGS. 1 and 2, and is the figure which shows the case of fixing a handle. FIG. 3 is a plan view showing an upper plate and a knob bolt constituting the handle shaft rotation range regulating means in FIG. FIG. 3 is a plan view showing a middle plate constituting the handle shaft rotation range regulating means in FIG. It is a top view which shows the lower plate which constitutes the handle shaft rotation range regulation means in FIG. It is a partial cross-sectional side view which shows the grooving part, the grooving part rotation range regulating means, and the neutral return mechanism in FIG. It is a top view which shows the neutral return mechanism in FIG. It is an arrow view of IX-IX in FIG. It is a rear view which shows the groove cutting part rotation range regulation means in FIG. 7. It is a top view which shows the phase relationship between a wheel and a grooving part, and is the figure which shows the state which a wheel and a grooving part are located in a neutral position. It is a top view which shows the phase relationship between a wheel and a grooving part, and is the figure which shows the state which the wheel is turned clockwise from a neutral position. It is a top view which shows the phase relationship between a wheel and a grooving part, and is the figure which shows the state which the wheel is turned counterclockwise from a neutral position.

Hereinafter, preferred embodiments of the passenger grooving machine according to the present invention will be described with reference to the accompanying drawings. 1 and 2 are views showing a passenger grooving machine according to an embodiment of the present invention, and FIG. 3 is a vertical sectional view showing a handle, a handle shaft, and a handle shaft rotation range regulating means, in the case of fixing the handle. 4 to 6 are views showing the handle shaft rotation range regulating means, and FIG. 7 is a partial cross-sectional side view showing the grooving portion, the grooving portion rotation range regulating means, and the neutralization return mechanism. 8 is a plan view showing the neutralization return mechanism, FIG. 9 is a rear view showing the IX-IX arrow view in FIG. 7, FIG. 10 is a rear view showing the grooving portion rotation range regulating means, and FIGS. 11 to 13 are wheels. It is each plan view which shows the phase relationship of a groove cutting part. In the following explanation, the terms "front", "rear", "top", "bottom", "left", "right", etc. refer to the case where the passenger grooving machine is placed on a horizontal plane. It is based on the state where the forward direction of is defined as forward.

As shown in FIGS. 1 and 2, the passenger grooving machine 100 has a handle 1 gripped by an operator, a handle shaft 2 extending diagonally downward and forward from the lower part of the handle 1, and a handle shaft 2 in the front portion thereof. A connecting bracket 3 connected to the lower end and offset to the front side of the paper surface and extending downward at the same inclination as the handle shaft 2, a gear case 4 connected to the connecting bracket 3, and a hub inside the gear case 4 are connected to the outer circumference. A wheel 6 provided with flat plate-shaped non-slip 5s at equal intervals along the circumferential direction of the wheel 6 is provided, and a grooving portion 7 for cutting a groove in a field and a grooving portion 7 are connected to the rear portion thereof. It includes a grooving shaft 8 that extends diagonally upward and rearward.

Further, the passenger grooving machine 100 includes a main body frame 9 that extends backward in the front-rear direction. A handle shaft rotation support pipe 10 is provided at the front portion of the main body frame 9, and the handle shaft 2 is inserted into the handle shaft rotation support pipe 10 and rotatably connected to the handle shaft rotation support pipe 10.

The main body frame 9 is provided with a seat 12 for an operator to sit straddling the upper part of the main body frame 9 substantially in the center in the axial direction. The vertical position of the seat 12 can be adjusted. Further, the rear side of the main body frame 9 from the center in the axial direction is substantially U-shaped so that the transmission shaft accommodating pipe 13 described later can enter and swing in the left-right direction (vertical direction on the paper surface) with the handle shaft 2 as the rotation axis. It is provided with a curved portion 14 that is curved so as to bulge sideways (on the back side of the paper surface). A grooving portion shaft rotation support pipe 11 is provided at the rear end portion extending rearward from the curved portion 14 of the main body frame 9, and the grooving portion shaft 8 is inserted into the grooving portion shaft rotation support pipe 11 so as to be rotatable. It is connected.

The grooving portion 7 has a tapered C shape in a plan view, and is formed by connecting flat plates so as to form a V-shaped groove in a front-rear direction. At the upper end, a flat plate extending horizontally outward along a V shape is continuously provided. Then, when grooving by the grooving portion 7, the tip of the V-shaped groove is made to bite into the field, and the soil pushed upward to the outside of the V-shaped groove is diffused to the left and right.

The gear case 4 accommodates a curved tooth bevel gear and the like, and a transmission shaft accommodating pipe 13 accommodating a transmission shaft inside and extending backward in the front-rear direction is connected to the gear case 4, and the transmission shaft accommodating pipe 13 is connected to the gear case 4. The prime mover 15 is connected to the rear end. The transmission shaft accommodating pipe 13 extends rearward while being slightly inclined to the right side (back side of the paper surface) by the curved tooth bevel gear of the gear case 4. The prime mover 15 is arranged behind the seat 12, and the transmission shaft accommodating pipe 13 is arranged so as to pass under the seat 12 and inside the curved portion 14 of the main body frame 9 to reach the prime mover 15. Then, the driving force of the prime mover 15 is transmitted to the hub of the gear case 4 via the transmission shaft, and the wheels 6 rotate. The connecting bracket 3 and the transmission shaft accommodating pipe 13 are connected by a reinforcing frame 29.

As shown in FIG. 3, the handle shaft 2 is rotatably supported via a flange type bearing (oil-free bearing) 16 housed in the handle shaft rotation support pipe 10, and the handle shaft rotation support pipe 10 is supported. As shown in the front surface and FIGS. 1 to 3, the rotation range of the handle shaft 2 is restricted on the front surface of the bracket portion 37 located below the handle shaft rotation support pipe 10 in the connecting bracket 3 and extending in the left-right direction. The handle shaft rotation range regulating means 17 is provided.

As shown in FIG. 3, the handle shaft rotation range regulating means 17 is fixed to the front surface of the upper plate 18 fixed to the front surface of the handle shaft rotation support pipe 10 and the front surface of the bracket portion 37, and is separated below the upper plate 18. It includes a middle plate 19 and a lower plate 20 which are arranged so as to be stacked.

As shown in FIGS. 3 and 4, a knob bolt 21 is screwed into the upper plate 18. As shown in FIG. 5, a long hole 22 extending in a circular arc shape in a plan view is formed through the middle plate 19 with the handle shaft 2 as the center of rotation, and the tip end portion of the knob bolt 21 enters the long hole 22 and is loosely fitted. It is said that it can be placed. As shown in FIG. 6, the lower plate 20 is formed with a through hole 23 at a position below the knob bolt 21 so that the tip of the knob bolt 21 can enter. Then, as shown in FIG. 3, the knob bolt 21 is screwed into the upper plate 18, and the tip of the knob bolt 21 is inserted into the elongated hole 22 (see FIG. 5) of the middle plate 19, whereby the handle shaft 2 and the handle 1 are inserted. Is rotatable. The rotation range of the handle shaft 2 and the handle 1 is a range until the left and right end portions of the elongated hole 22 of the middle plate 19 move and come into contact with the tip end portion of the knob bolt 21.

Further, the handle shaft 2 and the handle 1 can be fixed non-rotatably by further screwing the knob bolt 21 into the upper plate 18 and allowing the tip of the knob bolt 21 to enter the through hole 23 (see FIG. 6) of the lower plate 20. .. Note that FIG. 3 shows a case where the handle shaft 2 and the handle 1 are fixed.

Here, in the present embodiment, the tip end portion of the knob bolt 21 does not enter the through hole 23 of the lower plate 20, and the elongated hole 22 of the middle plate 19 is loosely fitted. When the rotation operation (steering) is performed, the wheel 6 turns in the left-right direction (counterclockwise, clockwise) with the handle shaft 2 as the rotation axis, and the transmission shaft accommodating pipe 13 and the prime mover 15 rotate in the left-right direction (counterclockwise,). Turn clockwise). A lever bolt or an index plunger may be used instead of the knob bolt 21.

Further, as shown in FIGS. 1 and 2, a neutral return mechanism 24 is interposed between the transmission shaft accommodating pipe 13 and the groove cutting portion shaft 8. As shown in FIGS. 1, 7 and 8, the neutral return mechanism 24 is a coil as an elastic body that pulls the transmission shaft accommodating pipe 13 and the grooving shaft 8 toward the neutral position around the center of rotation. It is connected via springs 25a and 25b. A front adjusting plate 26 extending in the left-right direction is connected to the transmission shaft accommodating pipe 13, and a rear adjusting plate 27 extending in the left-right direction is fixed to the grooving shaft 8 via a rotating bracket 31. The front adjusting plate 26 and the rear adjusting plate 27 are provided with a plurality of locking portions (locking holes) 28 for locking the ends of the coil springs 25a and 25b at intervals along the left-right direction. (See FIG. 8).

As shown in FIGS. 1 and 2, the rotating bracket 31 is formed in an L shape by a flat plate. In the rotary bracket 31, the front end of the bottom plate 31a forming an L shape is fixed to the rear end of the adjusting plate 27 on the rear side, and the groove cutting portion shaft 8 penetrates and is fixed to the bottom plate 31a.

As shown in FIGS. 2 and 8, the coil springs 25a and 25b are provided on the left and right sides of a straight line connecting the handle shaft 2 and the rotation axis of the transmission shaft accommodating pipe 13 in a plan view, respectively. The right coil spring 25a is arranged below the front and rear adjusting plates 26 and 27, and the left coil spring 25b is arranged above the front and rear adjusting plates 26 and 27, respectively.

Further, the grooving portion 7 connected to the transmission shaft accommodating pipe 13 diagonally in a plan view via the neutral return mechanism 24 is located at a neutral position facing forward in the traveling direction of the passenger grooving machine 100 ( The locking position of the left coil spring 25b with respect to the front adjusting plate 26 is offset to the left (to match the neutral position of the wheel 6), and exerts a stronger tensile force than the right coil spring 25a.

Further, as shown in FIG. 7, the groove cutting portion shaft 8 is rotatably supported via a flange type bearing (oil-free bearing) 36 housed in the groove cutting portion shaft rotation support pipe 11. 1. As shown in FIGS. 2 and 7, a grooving portion that regulates the rotation range of the grooving portion 7 is provided on the rotary bracket 31 fixed to the grooving portion shaft 8 and the grooving portion shaft rotation support pipe 11. The rotation range regulating means 30 is provided.

The grooving portion rotation range regulating means 30 comprises a bolt 32 as a projecting member projecting rearward from the grooving portion shaft rotation support pipe 11 and an L-shape of the rotation bracket 31. It is provided with a regulation bracket 31b that projects upward.

As shown in FIGS. 2, 7, 9 and 10, the regulation bracket 31b is provided with a recess 33 that is open upward and extends in the left-right direction at the upper portion thereof, and a bolt 32 is inserted into the recess 33. Therefore, when the grooving portion 7 and the grooving portion shaft 8 rotate, the regulation bracket 31b rotates around the grooving portion shaft rotation support pipe 11. The rotation range of the grooving portion 7 and the grooving portion shaft 8 is the range until the regulation bracket 31b rotates and the bolt 32 abuts on the left and right ends forming the recess 33 of the regulation bracket 31b.

When using the passenger grooving machine 100 having such a configuration, the operator sits on the seat 12 and drives the prime mover 15, and transfers the driving force of the prime mover 15 to the transmission shaft accommodating pipe 13. It is transmitted to the gears in the gear case 4 and the inner hub via the housed transmission shaft, and the wheels 6 rotate as drive wheels.

At this time, the handle shaft 2 and the grooving portion shaft 8 are located at neutral positions around the center of rotation, and as shown in FIG. 11, the direction of the wheel 6 and the direction of the grooving portion 7 coincide with each other. The passenger grooving machine 100 moves forward. At this time, since the weight of the passenger grooving machine 100 and the operator is applied to the wheel 6 and the grooving portion 7, the grooving portion 7 following the wheel 6 forms a groove in the field.

When the handle 1 is rotated while the passenger grooving machine 100 is moving forward, the handle shaft 2, the connecting bracket 3, the wheels 6, the gear case 4, the transmission shaft accommodating pipe 13, and the prime mover 15 move the rotation axis of the handle shaft 2. When the wheel 6 rotates to the center and the steering wheel 1 is turned to the right, for example, the wheel 6 turns to the right and the traveling direction of the passenger grooving machine 100 is changed to the right as shown in FIG. Further, for example, when the steering wheel 1 is turned to the left, as shown in FIG. 13, the wheel 6 turns to the left and the traveling direction of the passenger grooving machine 100 is changed to the left.

At this time, since the grooving portion shaft 8 is connected to the transmission shaft accommodating pipe 13 via the neutral return mechanism 24 having the coil springs 25a and 25b, the grooving portion 7 is the rotation axis of the grooving portion shaft 8. When the handle 1 is turned to the right, it rotates counterclockwise as shown in FIG. 12, and when it is turned to the left, it rotates clockwise as shown in FIG. That is, the phase in which the handle shaft 2 is rotated and the phase in which the grooving portion 7 is rotated are opposite to each other, and the passenger grooving machine 100 advances with the wheels 6 and the grooving portion 7 facing in opposite directions.

In this state, the neutralizing mechanism 24 operates so that the operating direction of the handle 1 does not stay as it is, and the coil springs 25a and 25b rotate the handle 1 and the grooving portion 7 in the opposite direction to the above, and the neutral position. Return to.

As described above, according to the present embodiment, when the handle shaft 2 of the handle 1 rotatably connected to the main body frame 9 having the seat 12 is cut from the neutral position, the handle shaft 2 is rotatably connected to the main body frame 9. Because the coil springs 25a and 25b as elastic bodies connecting the connected rotary bracket 31 (grooving portion 7) and the handle shaft 2 pull the rotary bracket 31 and the handle shaft 2 toward each other in a neutral position. , The handle 1 is easily returned to the neutral position, and stable straightness can be maintained.

Further, since the coil springs 25a and 25b are provided on both the left and right sides of the straight line connecting the handle shaft 2 and the rotation axis of the rotation bracket 31 (grooving portion 7) in a plan view, the handle 1 can be placed on either the left or right side. The handle 1 is easily returned to the neutral position even when it is cut to.

Further, in addition to the above configuration, the handle shaft 2 is rotatably connected to the front portion of the main body frame 9, and the grooving portion 7 is rotatably connected to the rear portion of the main body frame 9 via the rotating bracket 31. Therefore, the phase in which the handle shaft 2 is rotated and the phase in which the groove cutting portion 7 is rotated can be made opposite to each other, the wheel 6 and the grooving portion 7 are oriented in opposite directions, and the turning radius and the inner ring difference can be reduced. You can make a small turn.

Further, since the handle shaft rotation range regulating means 17 for regulating the rotation range of the handle shaft 2 is provided, the rotation range of the handle 1 is regulated, and interference with parts due to excessive cutting of the handle 1 and unnecessary load are suppressed. can.

Further, according to the present embodiment, the following actions and effects are also obtained. That is, the knob bolt 21 is screwed in, the tip portion is made to enter the through hole 23 of the lower plate 20, the handle shaft 2 is fixed and locked, so that the groove cutting portion 7 is floated and the wheel 6 is rolled without the handle 1 turning. Since the traveling work can be performed while traveling, the passenger grooving machine 100 can be easily transported and moved in the field, and the handle 1, the wheels 6, the transmission shaft accommodating pipe 13, and the prime mover 15 do not move, which is safe.

Further, by changing the mounting positions of the coil springs 25a and 25b with respect to the locking portion 28 of the adjusting plate 26 on the front side and the adjusting plate 27 on the rear side of the neutral return mechanism 24, the angles of the coil springs 25a and 25b are adjusted to load the load. Since it can be changed, the difference in operation performance can be reduced even in a field where the handle 1 is easily taken.

Although the present invention has been specifically described above based on the embodiment, the present invention is not limited to the above embodiment. For example, in the above embodiment, the groove cutting portion 7 is represented by a C shape in a plan view. The flat plates are connected in succession so as to form a V-shaped groove in the shape and the anteroposterior direction, but the abacus ball shape may also be used.

Further, in the above embodiment, the rotating bracket 31 is fixed to the grooving portion shaft 8 so that the grooving portion 7 is also rotated in conjunction with the handle operation, but the rotating bracket 31 is attached to the grooving portion shaft 8. It does not have to be rotatably supported and the grooving portion 7 is not interlocked with the handle operation. Further, even if the grooving portion shaft 8 is fixed to the grooving portion shaft rotation support pipe 11 so that the grooving portion 7 faces in the forward direction, and the rotary bracket 31 is rotatably connected to the grooving portion shaft 8. good.

1 ... Handle, 2 ... Handle shaft, 6 ... Wheel, 7 ... Grooving part, 8 ... Grooving part shaft, 9 ... Body frame, 12 ... Seat, 13 ... Transmission shaft accommodating pipe, 15 ... Motor, 17 ... Handle shaft Rotation range regulating means, 25a, 25b ... Coil spring (elastic body), 31 ... Rotation bracket, 100 ... Passenger grooving machine.

Claims (5)

In a passenger grooving machine (100) in which an operator sits on a seat (12) provided on a main body frame (9) and cuts a groove by a grooving portion (7) while advancing by rotation of a wheel (6).
The handle shaft (2) of the handle (1) that steers the wheels (6) is rotatably connected to the main body frame (9), and the rotary bracket (31) is rotated with respect to the main body frame (9). Connect freely,
Elastic bodies (25a, 25b) that pull the handle shaft (2) and the rotating bracket (31) so that the handle shaft (2) and the rotating bracket (31) are mutually oriented toward a neutral position around the center of rotation. A passenger grooving machine (100) characterized in that it is connected via. The claim is characterized in that the elastic bodies (25a, 25b) are provided on both the left and right sides of a straight line connecting the rotation axes of the handle shaft (2) and the rotation bracket (31) in a plan view. 1. The passenger grooving machine (100) according to 1. The handle shaft (2) is connected to the front portion of the main body frame (9), and the rotating bracket (31) is connected to the rear portion of the main body frame (9).
The passenger grooving machine (100) according to claim 1 or 2, wherein the grooving portion (7) is fixed to the rotating bracket (31). A prime mover (15) that applies a driving force to the wheel (6) and a transmission shaft that transmits the driving force of the prime mover (15) to the wheel (6) are connected to the handle shaft (2).
The prime mover (15) is arranged behind the seat (12), and the transmission shaft passes from the wheel (6) under the seat (12) to reach the prime mover (15). Placed,
3. The passenger grooving machine (100) according to item 1. The passenger grooving machine (100) according to any one of claims 1 to 4, further comprising a handle shaft rotation range regulating means (17) for regulating the rotation range of the handle shaft (2).

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