JP3103350B2 - Planting part of riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for reducing the weight and the driving force of a vertical and horizontal feed driving force of a seedling mounting table of a four-row planting part and a power transmitting part of a planting claw.

[0002]

2. Description of the Related Art In recent years, workers have become aging due to agricultural circumstances, and walking-type rice transplanters place a heavy burden on workers. Therefore, riding-type rice transplanters have been desired. In the riding type rice transplanter, an elevating link mechanism for pulling the planting portion is fixedly provided at a rear portion of the body frame that is long in the front-rear direction. The planting section is a vertical transmission and a lateral transmission shift of the seedling mounting table, a planting transmission case that performs a drive shift of the planting claw, a planting transmission case arranged in front and rear, a symmetrical position of the planting transmission case, A rotary case having a planting claw is provided, and a power transmission system in which a plurality of cases are assembled is configured. These cases were formed by aluminum die casting.

[0003]

However, the power transmission system of the planting section, in which a plurality of aluminum die-cast cases are assembled, has a heavy structure, and the total weight of the planting section is also large. Therefore, the burden on the rear part of the body frame, which is the base of the lifting link mechanism for pulling the planting portion, becomes large, and the body frame needs to be a large frame with high rigidity. Furthermore, in order to maintain the front-rear balance, it is necessary to arrange a balance weight at the front of the traveling vehicle, so that the overall shape of the traveling vehicle is increased and the cost is increased. In addition, in a configuration in which a plurality of cases are assembled, an assembling operation is complicated, and an assembling cost in a factory is increased. As described above, when the case for transmitting power is manufactured by aluminum die casting, the cost is high. Therefore, a power transmission unit having a simple configuration and having a configuration that can be easily assembled and reduced in cost has been desired.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in a riding rice transplanter in which a planting portion is arranged at the rear of the body so as to be able to move up and down, a power transmission mechanism of the planting portion, a transmission pipe is arranged on the left and right, and a front portion of the transmission pipe is connected using a connecting pipe. Connected, formed into a portal type in plan view, with planting claws arranged on the open rear part of the gate type, and supporting the input shaft at the connection part between the transmission pipe on one side and the connection pipe on one side, and A transmission that extends rearward and drives the planting claws
A seedling table driving mechanism is disposed at a connection portion between the transmission pipe on the other side and the connection pipe, and power is taken out from the transmission shaft supported in the connection pipe.

[0005]

Next, an embodiment of the present invention will be described. FIG. 1 is an overall side view of a small riding rice transplanter having a body frame formed by a pipe body, FIG. 2 is a partial sectional view of the same overall riding plan, FIG. 3 is a side sectional view showing the front upper part of the small riding rice transplanter, and FIG. FIG. 5 is a side sectional view of a cylinder supporting a rolling fulcrum shaft of a planting portion, FIG. 6 is a plan view partially sectional view showing a planting transmission frame, FIG. 7 is a side view of the same, FIG. FIG. 9 is a plan view, partly in section, showing a power transmission configuration of the planting transmission frame, FIG. 9 is a side view showing the same power transmission configuration, FIG. 10 is a plan cross-sectional view showing a configuration in which a transmission shaft in the transmission pipe is removed, FIG. Is a perspective view of a seedling table on which a vertical feed belt is arranged, and FIG. 12 is a side sectional view of a transmission case.

First, a small riding rice transplanter is shown in FIGS.
A more general configuration will be described. A front and rear wheel 6 and a rear wheel 8 are suspended at a front portion and a rear portion of the traveling vehicle 1, an engine E is mounted above a front portion of the body frame F, and a transmission case M having a long front and rear portion is disposed at the center of the traveling vehicle 1. The front wheel 6 is supported at the front of the transmission case M, and the rear wheel 8 is supported at the rear of the transmission case M. Spare seedling mounts 10 are disposed on both sides of a bonnet 12e that covers the engine E, and the transmission case M and the like are covered by a body cover 12 on which an operator or the like rides. 13 and the driver's seat 1
3 and a steering handle 1 at the rear of the bonnet 12e.
4 are arranged.

[0007] The planting section 15 is composed of a seedling stand 16 formed by four-row planting, a plurality of planting claws 17, and the like. A planting transmission frame 20 is supported by the planting transmission frame 20 so as to be reciprocally slidable left and right, and planting claws 17, which are cranked by a crank mechanism 21, are disposed at the rear of the planting transmission frame 20.

A hitch 24 is provided at a front portion of the planting transmission frame 20 via a rolling fulcrum shaft 23, and the hitch 24 is provided at a rear portion of the traveling vehicle 1 via a lifting link mechanism 27 including a top link 25 and a lower link 26. And an elevating cylinder 28 for driving the elevating link mechanism 27 to elevate and lower is connected to a lift arm connected to the lower link 26. And the front wheel 6.6 and the rear wheel 8.8
At the same time, the seedlings for one plant are taken out from the seedling table 16 which can be reciprocated slidably to the left and right by the planting claws 17 and the seedlings are continuously planted.

A traveling speed change lever 29, a main clutch pedal 32, a planting elevating lever 30, a brake pedal 33, and a planting depth setting lever 31 are disposed on the vehicle body cover 12 on which the driver's seat 13 and the like are installed. In the lower part of the planting part 15, a center float 34 for leveling and a side float 3
5 are provided. The center float 34 is disposed on the left and right center lines of the traveling vehicle 1, and the center float 3
The side floats 35 are disposed at the left-right symmetrical positions of 4, so that the left-right balance of the planting portion 15 is maintained well.

The fuselage frame F includes a main frame 2
And an engine frame 3. The engine frame 3 is disposed in front of and in front of the front wheel 6 in a side view. The engine frame 3 is formed by bending a pipe body in a substantially U-shape in plan view along the front part shape of the traveling vehicle 1 and turning the open side rearward with the main frame 2. Is fixed to a horizontal member 41 fixed to the front end of the first member. A front portion of the engine frame 3 is bent upward to form a bumper portion 3a, and a light 40 is provided on the bumper portion 3a.
Etc. can also be attached. The front ends of two main frames 2 formed of pipes are fixedly provided in the left and right middle portions of the horizontal member 41. The main frames 2 and 2 are arranged in parallel left and right, a rear portion of the main frames 2 and 2 is curved rearward and upward, and a rear end of the main frames 2 and 2 is disposed above the rear wheel 8.

A body cover 12 is mounted on the upper part of the main frames 2. The vehicle body cover 12 is integrally formed of a synthetic resin, and a rear portion of the vehicle body cover 12 is bulged upward to form a driver seat mounting portion 12a. The driver seat 3 is mounted on the driver seat mounting portion 12a. The main frame 2 is supported by a seat frame 9 at the rear of the main frame 2.
In addition, a step portion 1 is provided in front of the driver seat mounting portion 12a.
2b, a bonnet 12e in front of the step portion 12b is formed, and a passage portion 12c is formed on the left and right sides of the bonnet 12e.

The transmission case M extends from the lower front and rear central portions of the fuselage frame F to the rear lower portion of the rear end of the fuselage frame F, and is formed to be long in the front-rear direction. ing. In addition, a transmission 51 is formed with a traveling transmission mechanism inside the transmission case M, and front axle cases 5.5 are fixedly provided on left and right side surfaces of the transmission 51, respectively.
Axle cases 53, 53 from the left and right ends of
The front wheel 6 is fixed to the lower end of the axle case 53.
The axle 54 to which the 6 is fixed is supported. At the rear end of the transmission case M, there are formed cylindrical rear axle cases 7.7 each having an axial center in the left-right direction, and axles 56 are supported in the rear axle cases 7.7. 5
The rear wheels 8.8 are fixed to the left and right ends of the 6.56 so that the conventional transmission case is eliminated. Therefore, front and rear front axle cases 5.5 and rear axle cases 7
And 7 are integrally formed in the same transmission case M,
The transmission case M constitutes a part of a frame member that supports the wheels 6,8.

As shown in FIGS. 1, 3 and 12,
An input shaft 60 projects laterally from the transmission portion 51 of the transmission case M, and power is transmitted to a pulley 61 fixed to the input shaft 60 via the belt 48, and a belt 48 for transmitting the power of the engine E is provided. And the transmission case M are arranged on a substantially straight line, and a power transmission path for transmitting power to each of the wheels 6 and 8 has a space-saving and efficient arrangement.

The transmission unit 5 of the transmission case M
1, a PTO shaft 62 as shown in FIG.
The drive of the PTO shaft 62 is transmitted to the planting section 15 via a universal joint.

Next, the support structure of the body frame F mounted on the transmission case M which suspends the wheels 6, 8 will be described. As shown in FIG. 3, in the middle of the main frame 2.2 above the front axle case 5.5, a support bracket 8 is provided below the main frame 2.2.
1. A fixed plate 82 is fixedly mounted on the support bracket 81. The fixed plate 82 is arranged on the front surface of the front axle case 5 and fixed to a boss formed on the upper portion of the front axle case 5. The front part of the body frame F is fixed to the front axle case 5.

A rear connecting frame 85 formed of a pipe is fixedly provided at the rear of the main frames 2. The other end of the rear connecting frame 85 extends to a position near the rear axle case 7 at the lower rear. And is fixed to the side of the rear axle case 7 using a fixing plate 86.
Therefore, the rear end of the main frame 2 and the rear end of the transmission case M are connected via the rear connection frame 85, and the vehicle body F, the transmission case M and the rear connection frame 85 form a triangular traveling vehicle. 1 is formed. The transmission case M has an elongated shape, and is formed in a tubular shape as shown in a sectional view in FIG.
Are formed, the section modulus is increased, a rigid case is formed, and a highly rigid integral frame for suspending the wheels 6 and 8 is formed.

Next, a description will be given of a support structure of the center float 34 and the side float 35 for leveling, which hold the planting portion 15 at a fixed height. As shown in FIGS. 1 and 2, a fulcrum shaft 100 is provided below the planting transmission frame 20, which is a power transmission unit of the planting unit 15, with left and right side floats 35.
・ It is installed horizontally to fit the width of 35. The fulcrum shaft 10
Are protruded toward the rear of each of the floats 34 and 35 below and below the proper position of the float 0, and are pivotally supported on the rear of each of the floats 34 and 35. Also,
An operation arm 102 projects forward from the fulcrum shaft 100, and a planting depth setting lever 31 projects above the front end of the operation arm 102. Further, an intermediate portion of the planting depth setting lever 31 passes through a cover 99 fixed to the upper support frame 98 shown in FIG. 2, and is engaged with a latch formed on the cover 99. . Therefore,
When the planting depth setting lever 31 is operated, the rear ends of the support arms 101 move vertically around the fulcrum shaft 100, and the vertical distance between each of the floats 34 and 35 and the fulcrum shaft 100 is adjusted. The height of the attachment portion 15 is moved up and down, and the seedlings cut by the planting claws 17 are planted at a certain depth.

Next, the power transmission configuration of the planting section 15 will be described. As shown in FIGS. 6 to 9, in this embodiment, the planting portion 15 is used for four-row planting, and the four planting claws 1 are used.
7.17.17.17. A transmission pipe 110 for transmitting a driving force to two of the planting claws 17.
· Two transmission pipes 110 · 1
The front portion is connected by a connecting pipe 111 to form a portal-type planting transmission frame 20 in plan view, with the open side of the portal facing rearward, and planting claws 17 on the left and right sides of the left and right open side ends.
・ 17 are arranged. A transmission shaft is supported inside the transmission pipe 110 and the connection pipe 111.

As shown in FIGS. 6 and 7, the transmission pipe 110 and the connection pipe 111 of the planting transmission frame 20 are formed as rod-shaped pipes. They are connected by a T-shaped pipe 112 having a T shape in a plan view. The T-shaped pipe 112
It is formed by a horizontal pipe 112a and a vertical pipe 112b. That is, a T-shaped pipe 112 is connected to the front and rear ends of the transmission pipe 110, and one side (the right side in the present embodiment) of the T-shaped pipe 112 disposed at the front part is a horizontal pipe 112a.
Are arranged in the front-rear direction, the front part of the transmission pipe 110 is inserted into the horizontal pipe 112a, and one side of the connecting pipe 111 is inserted into the vertical pipe 112b. The T-pipe 112 on the other side (left side) of the T-pipe 112 arranged at the front is
The axis of the horizontal pipe 112a is aligned with the axis of the connecting pipe 111, the connecting pipe 111 is inserted into the horizontal pipe 112a, and the front part of the left transmission pipe 110 is inserted into the vertical pipe 112b. Also, a T-shaped pipe 1
12 ・ 112 is a horizontal pipe 112a of the T-shaped pipe 112
Are arranged in the left-right direction to transmit power to the crank mechanism 21 disposed on both sides of the horizontal pipe 112a.

Further, the planting transmission frame 20 includes:
A support for supporting the drive case 108, the crank mechanism 21, and the upper support frame 98 is fixedly provided. That is, a crank support arm 113 projects rearward and upward from a rear portion of the T-shaped pipe 112 disposed at a rear portion of the transmission pipe 110. T-type pipe 1 placed in front of left transmission pipe 110
12, a case support arm 114 is projected forward and upward, and a horizontal shaft support arm 115 is projected parallel to the case support arm 114 upward and forward from a right front portion of the connection pipe 111. The cylindrical body 11 in which the rolling fulcrum shaft 23 is fitted forward from the left and right central portions of the connecting pipe 111.
7 is fixedly provided. The planting transmission frame 2
T-pipe 112 ・ 11 arranged at the front, which is the front of 0
At the front, brackets 116 to which the upper support frame 98 is fixed are fixed to the front part. Therefore, the crank mechanism 21, the drive case 108, and the support portions of the transverse feed shaft 109 are firmly fixed to the planting transmission frame 20 which has a simple configuration in which the pipe bodies are connected and has a sufficient space.
A durable support portion is configured that is resistant to vibration and shock.

As described above, the power section (engine E) is disposed at the front of the body frame F, transmits power to the front wheels 6.6 and the rear wheels 8.8, and the planting section 15 can be moved up and down at the rear of the body. In the riding rice transplanter arranged in the above, the transmission pipes 110, which are constituted by rod-shaped pipe bodies, are
· Connection of T-shaped pipes 112 · 112 ··· formed with a T-shaped pipe body at the front and rear ends of 110, and connection of T-shaped pipes 112 · 112 at the left and right front parts with rod-shaped pipe bodies Connected using a pipe 111, integrally molded into a portal type in plan view, and planted claws 17, 17 ... at the rear end on the open side of the portal type.
Is arranged, each planting claw 17.1
7 to transmit the driving force to the planting transmission frame 20
Can be integrally formed into a portal type by connecting a commercially available rod-shaped pipe body and a T-shaped pipe body in plan view, so it is necessary to specially manufacture a case for transmitting power by aluminum die casting. The planting transmission frame 20 can be easily manufactured in a factory, and the cost can be significantly reduced by using a commercially available pipe body.

As shown in FIG. 6, the crank support arm 113 has a rear portion branched in two directions, and a pivotal support portion 113a.
A pivotal portion 1 having a substantially Y-shape in plan view on which 113a is formed;
Pins for pivotally supporting the arm base of the crank mechanism 21 are fixedly provided at the rear portions 13a and 113a. Further, between the left and right pivot portions 113a, 113a, a portal-type reinforcing body 107 is provided in a plan view.
Thus, the crank mechanisms 21 can be firmly pivotally supported.

Further, the cylindrical body 117, the center of gravity is fixed to the horizontal center position of the planting transmission frame 20 to stabilize, as shown in FIG. 5, the open surface of the side view U-shaped fixed body 118 , the connecting center portion of the pipe 111 is fitted, is fixed toward a front upper open end portion of the fixed <br/> 118, solid
Cylindrical body 117 having an axis in the longitudinal direction of the upper constant body 118
There is fixed a reinforcing member 119 is fixed between the cylindrical body 117 front lower and fixed body 118 lower, cylindrical body 117 in the left-right central upper portion of the connecting pipe 111 is firmly fixed. Therefore, the rolling fulcrum shaft 23 is firmly fixed, and the planting portion 15 can be stably rolled.

As described above, the tubular body 117 into which the rolling fulcrum shaft 23 as a mounting member of the planting portion 15 is fitted is fixedly provided at the left and right central portions of the planting transmission frame 20 in plan view. Thus, since the planting transmission frame 20 of the portal type in a plan view has a simple configuration in which the pipe bodies are connected, the cylindrical body 11 in which the rolling fulcrum shaft 23 is fitted.
7 can be arranged in the center of the planting transmission frame 20 in the center of the left and right sides, which has the best balance of the center of gravity in the lateral direction, and the balance of the planting unit 15 as a whole in the left and right direction is also maintained well.
The accuracy of planting seedlings can be improved.

As shown in FIGS. 8 and 9, the drive case 10 is mounted on each support portion of the planting transmission frame 20.
8 and the like are fixed. The crank support arm 113
The link bases of the crank mechanism 21 are pivotally supported on both left and right sides of the rear end of the drive mechanism 123. The other ends of the drive shaft 123 that supports the T-shaped pipe 112 at the rear of the transmission pipe 112 constitute the crank mechanism 21. The link is fixed, and the planting claw 17 is cranked. In addition, an upper support frame 98 that bends a pipe body in a gate shape is disposed at the front of the planting transmission frame 20, and left and right open ends of the upper support frame 98 are screwed to brackets 116 and 116 respectively. ing. The upper support frame 98 passes in front of a transverse feed shaft 109 described later and extends upward. The guide rail 19 described above is supported using the upper portion of the upper support frame 98, and the planting transmission frame 20 and the upper support frame 98 are supported. Are integrally connected to each other to form a highly rigid frame that supports the planting portion 15.

A drive case 108 is fixedly provided on the outer side surface of the case support arm 114, and a lateral feed shaft 109 is supported at the front of the case support arm 114 and the front of the horizontal shaft support arm 115. The left end of the feed shaft 109 is inserted into the drive case 108. The lateral feed shaft 109 is disposed in parallel with the connecting pipe 111, and the lateral feed shaft 109 is disposed above the rolling fulcrum shaft 23 in a side view, so that the support structure of the lateral feed shaft 109 is simple, and the efficiency is improved. Has a good arrangement configuration.

As shown in FIGS. 8 and 9, a transmission shaft is supported inside the planting transmission frame 20. An input shaft 120 is supported on the right transmission pipe 110, a transmission shaft 122 is supported on the left transmission pipe 110, a transmission 121 is supported on the connecting pipe 111, and a T at the rear of the left and right transmission pipes 110. Drive shafts 123 are supported on the mold pipe 112.

The input shaft 120 is connected to the front T-shaped pipe 1.
12 protrudes forward from the horizontal pipe 112a, and one end of the universal joint shaft is connected to the PTO shaft 6 described above.
2 is transmitted. The input shaft 12
0, a bevel gear 124 is fixed to the rear end of the drive shaft 1.
The drive shaft 123 is driven by being engaged with a bevel gear 125 fixed at an intermediate part of the drive shaft 123. Also, input shaft 1
A bevel gear 127 is fixed to a front portion of the transmission pipe 121, and a bevel gear 12 fixed to an end of the transmission shaft 121 of the connecting pipe 111.
6 to transmit power to the transmission shaft 121. A bevel gear 128 is fixedly provided on the left side of the transmission shaft 121, and is meshed with a bevel gear 129 fixedly provided at a front portion of the transmission shaft 122 in the left transmission pipe 110.
Is transmitted and the bevel gear 1 fixed to the end of the transmission shaft 122
30, the drive shaft 123 is driven via the bevel gear 131 to drive the crank mechanism 21 disposed on the rear side of the transmission pipes 100, 100, and rotate the planting claws 17 in a locus shown in FIG. Configuration.

As described above, the input shaft 120 is connected to the transmission pipe 110 on one side on the left and right sides of the planting transmission frame 20 of a plan view portal type.
And the input shaft 120 protrudes forward from the front end of the T-shaped pipe 112, so that the transmission pipes 11 on the left and right sides of the planting transmission frame 20 in a plan view can be used.
By arranging the input shaft 120 at 0, the input shaft 120 is extended rearward as it is and serves also as a transmission shaft for driving the planting claws 17, so that a simple configuration can be achieved. In addition, a special power input configuration is not required, the number of parts can be reduced, and the cost can be reduced.

Next, a description will be given of an assembling and removing structure of a transmission shaft disposed in the planting transmission frame 20. The input shaft 120 in the transmission pipe 110 and the drive shaft 123 in the T-shaped pipe 112 are inserted and removed by removing the bearing. The transmission shaft 12 in the connecting pipe 111
1 is inserted and removed by removing the transmission case 108.
As shown in FIG. 10, the transmission shaft 122 in the left transmission pipe 110 is connected to the T-shaped pipe 112 at the rear of the transmission pipe 110.
The drive shaft 123 inside the connection pipe 111 is removed and the transmission shaft 121 in the connection pipe 111 is removed, and the bevel gears 129 and 130 fixed to the transmission shaft 122 are connected to the T-shaped pipe 112.
T-shaped pipe 11 taken out from 112 and fixed in front
An extraction hole 112c is opened in the front surface of 2, and the transmission shaft 122 is extracted from the extraction hole 112c.

Next, the power transmission to the seedling table drive mechanism including the lateral feed shaft 109 and the like will be described. The left end of the transmission shaft 121 in the connecting pipe 111 is a T-shaped pipe 11
2, is inserted into the drive case 108, and a sprocket 133 is fixed to an end. A sprocket 134 is also fixed to the left end of the transverse feed shaft 109 inserted in the drive case 108, and the sprocket 1
A chain (not shown) is wound between the sprocket 133 and the sprocket 133 to constitute a seedling table driving mechanism for transmitting power to the lateral feed shaft 109. Further, a groove 109a for sliding a sliding element is formed in the lateral feed shaft 109, and a sliding element receiver 137 is loosely fitted on an outer peripheral surface of the lateral feed shaft 109,
Sliding element 13 provided in sliding element receiver 137
8 is fitted in the groove 109a, the sliding element 138 slides in the groove 109a with the rotation of the lateral feed shaft 109, and the sliding element receiver 137 reciprocates on the lateral feed shaft 109 left and right. . The seedling table 16 is connected to a rear portion of the sliding child receiver 137 via a connecting portion (not shown).
, The seedling table 16 is reciprocated right and left.

The right end of the transverse feed shaft 109 is
The vertical feed cam 139 protrudes rightward from the horizontal shaft support arm 115 and overlaps with the input shaft 120 as shown in a plan view in FIG. 8 and above the input shaft 120 as shown in a side view in FIG. The conventional vertical feed shaft for driving the vertical feed cam 139 is eliminated, and the horizontal feed shaft 109 is also used as a vertical feed shaft. The vertical feed cam 139 is disposed so as to be in contact with the driven cams 140 shown in FIG. 11 below the seedling mounting table 16, and is configured to intermittently drive the vertical feed belt 141. The driven cams 140 are provided with two protrusions on the left and right, and the distance between the driven cams 140 is equal to the moving distance by the lateral feed.
6, the vertical feed cam 13
9 and the one-side driven cam 140 (140) are in contact with each other, the vertical feed belt 141 is driven, and the seedling mat is fed vertically.

As described above, the input shaft 120 is pivotally supported on one of the left and right sides of the planting transmission frame 20 in a plan view, and the seedling mounting drive mechanism is disposed on the other side. The input shaft 120 is supported on one of the left and right sides of the portal transmission plant 20 of a plan view portal type by being configured to take out power from an intermediate portion of the transmission shaft that is pivotally supported inside, and the shaft is inserted into another planting transmission frame. A simple power transmission structure that drives the planting claws 17 by the supporting transmission shaft can be configured, and power is transmitted to the seedling mounting drive mechanism from an intermediate portion of the transmission shaft. A good power transmission arrangement is provided. In addition, an input shaft is supported on one of the left and right sides, and a seedling mounting drive mechanism is provided on the other side.

A plano-type planting transmission frame 2
The two support arms 114 and 115 protrude from the front of
A horizontal feed shaft 109 is supported by the support arms 114 and 115, and the horizontal feed shaft 109 is arranged in parallel with the connecting pipe 111 which is a front portion of the planting transmission frame 20. Since the planting transmission frame 20 has a simple configuration in which the pipes are connected, there is room in the front space of the planting transmission frame 20, and the support arms 114 and 115 protrude so as to be parallel to the connection pipe 111. The feed shaft 109 can be arranged, and the seedling table 16 can be reciprocated accurately in the left-right direction using the horizontal feed shaft 109.

A power section (engine E) is disposed at the front of the body frame F to transmit power to the front wheels 6.6 and the rear wheels 8.8, and the four-row planting section 15 can be moved up and down at the rear of the body. In the riding rice transplanter arranged in
2) is connected in a plan view portal type to form a planting transmission case 20 for driving the planting claws 17, and the planting transmission case 20 is formed.
The horizontal feed shaft 109 is provided horizontally at the front, and the vertical feed cam 139 is protruded from the end of the horizontal feed shaft 109, thereby eliminating the vertical feed shaft for driving the vertical feed cam.
09 is also used as a vertical feed shaft, and can have a simple configuration. Further, a power transmission mechanism for driving the vertical feed cam can be eliminated, so that the number of parts can be reduced and the cost can be reduced.

The longitudinal feed shaft 141 is driven by the vertical feed cam 141 at the end of the horizontal feed shaft 109 so as to drive the vertical feed belt 141 of the two seedling platforms 16 arranged in one row. And a simple configuration in which the vertical feed cam 139 protrudes from the end of the horizontal feed shaft 109,
The vertical feed belts 141 arranged in two rows are linked to each of the 6
The vertical feed belt 141 is reliably driven, and the vertical feeding of the seedling mat can be performed accurately.

[0037]

As described above, the present invention has the following advantages. That is, as in claim 1,
In a riding rice transplanter in which a planting portion is arranged at the rear of the body so as to be able to move up and down, a power transmission mechanism of the planting portion, a transmission pipe is arranged on the left and right, and a front portion of the transmission pipe is connected using a connection pipe. Since it is formed in a portal view in plan view and the planting claws are arranged on the rear side of the open side of the portal , costs can be reduced as compared with the case where the case for transmitting power is manufactured by aluminum die casting. Also connected to the left and right transmission pipes
The input shaft is pivotally supported at the connection with the pipe, and the input shaft is
Extending backwards to serve also as the transmission shaft for driving the planting claws,
Seedling table drive at the connection between the transmission pipe on the other side and the connection pipe
A mechanism is arranged and power is transmitted from the transmission shaft that is supported in the connecting pipe.
Can be provided, so that an efficient power transmission configuration with less power loss can be provided. Further, since the input shaft is supported on one of the left and right sides and the seedling mounting drive mechanism is provided on the other side, the arrangement is well balanced between the left and right sides.

[Brief description of the drawings]

FIG. 1 is an overall side view of a small riding rice transplanter having an airframe of a pipe body.

FIG. 2 is a partial plan view of the same overall plan view.

FIG. 3 is a side sectional view showing a front upper portion of the small riding rice transplanter.

FIG. 4 is a rear sectional view of a transmission case.

FIG. 5 is a side view of a cylindrical body that supports a rolling fulcrum shaft of the planting portion.

FIG. 6 is a plan view, partly in section, showing the planting transmission frame.

FIG. 7 is a side view of the same.

FIG. 8 is a plan view, partly in section, showing a power transmission configuration of the planting transmission frame.

FIG. 9 is a side view showing the power transmission configuration.

FIG. 10 is a cross-sectional plan view showing a configuration in which a transmission shaft in a transmission pipe is removed.

FIG. 11 is a perspective view of a seedling table on which a vertical feed belt is arranged.

FIG. 12 is a side sectional view of a transmission case.

[Explanation of symbols]

 E engine F body frame 6 front wheel 8 rear wheel 15 planting part 17 planting claw 108 drive case 110 transmission pipe 111 connecting pipe 112 T-type pipe 120 input shaft 121 ・ 122 transmission shaft

Claims (1)

(57) [Claims] 1. A power transmitting mechanism for a transplanting rice transplanter in which a planting portion is vertically movable at a rear portion of a machine body, the power transmitting mechanism of the planting portion, wherein transmission pipes are arranged on right and left, and a front portion of the transmission pipe is connected to a connecting pipe. ligated with form in plan view portal, the open side rear portion of the gantry together with arranging the planting claw, and axially supports the input shaft at the connecting portion between the connecting pipe and the one lateral side of the transmission pipe, the Entering
Also serves as a transmission shaft that extends the force shaft backward and drives the planting claw
A seedling table drive mechanism is arranged at a connection portion between the transmission pipe and the connection pipe on the other side, and power is taken out from a transmission shaft supported in the connection pipe, and a planting section of a riding rice transplanter. .