JP2000342031A - Sulky rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sulky rice transplanter capable of not applying an excessive load to a universal joint part caused by reduction in an arrangement angle of a planting transmission shaft. SOLUTION: In this sulky rice transplanter liftably equipped with a planting part at the rear of a machine body, a PTO shaft 65 for transmitting power to the planting part is installed at the side of an integrated type transmission case which is formed and extended long in the longitudinal direction of the machine body, has a built-in traveling transmission mechanism at the front and axially supports a rear wheel driving shaft at the rear.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting section of a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, there is known a riding rice transplanter in which a planting portion is arranged at a rear portion of a body so as to be able to move up and down. And, such a riding rice transplanter has a P for transmitting power to the planting portion.
The TO shaft protrudes from the transmission case.

[0003]

However, this P
In the conventional riding rice transplanter, the TO shaft projects from the upper surface of the transmission case.
The TO transmission shaft is located on the upper surface of the transmission case, and the arrangement angle of the planting transmission shaft connecting the input shaft on the planting portion and the PTO transmission shaft is increased, so that the PTO transmission shaft, the planting transmission shaft and There was a problem that an excessive load was applied to the universal joint portion of the above and the universal joint portion between the planting transmission shaft and the planting portion side input shaft. SUMMARY OF THE INVENTION It is an object of the present invention to provide a riding rice transplanter capable of preventing an excessive load on a universal joint part by reducing the arrangement angle of a planting transmission shaft.

[0004]

In order to achieve the above object, the present invention provides the following riding rice transplanter. That is, in a riding rice transplanter in which a planting portion is disposed at the rear of the vehicle so as to be able to move up and down, the rice transplanter is formed to extend long in the front-rear direction of the vehicle, a traveling speed change mechanism is internally provided at a front portion, and a rear wheel drive shaft is provided at a rear portion. A riding rice transplanter characterized in that a PTO shaft for transmitting power to a planting portion is provided on a side surface of a supported integrated transmission case. The transmission case is provided with a support member for the PTO transmission shaft connected to the PTO shaft in the transmission case above the rear wheel drive shaft, and the PTO transmission shaft is located substantially in the middle of the planting section elevating area. Rice transplanter.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on examples shown in the drawings. FIG. 1 is a schematic side view showing an entire riding rice transplanter (A) according to the present invention. The riding rice transplanter (A) includes a traveling vehicle (1) and a planting section (9) connected to a rear portion of the traveling vehicle (1). As shown in FIG. A front wheel (2) and a rear wheel (3) are suspended at a front portion and a rear portion, respectively, and an engine (5) as a power unit is mounted on a front portion of the body frame (4). A transmission case (6) extending long in the front-rear direction is disposed substantially at the center of the body frame (4) at the rear of the engine (5), and a front wheel (2) is provided at the front of the transmission case (6). , And a rear wheel (3) is supported at the rear. Spare seedling mounts (90) are provided on both sides of the hood (22) that covers the engine (5), and a transmission case (6) and the like are covered by a body cover (20) on which an operator rides. And
A driver's seat (7) is provided at a rear upper portion of the vehicle body cover (20), and a steering handle (8) is provided behind a hood (22) in front of the vehicle body cover (20). Note that (7
5) is the main shift lever, (76) is the main clutch lever,
(77) is a planting elevating lever, and (74) is a main clutch pedal.

The mission case (6) is fixed to the body frame (4) formed at the front low, rear high, and near the foremost portion, near the rearmost portion, and near the middle portion. In the vicinity, a mounting member (51) that extends from the support member (50) obliquely inward and downward toward the support member (50) on which the engine (5) is mounted.
Has been fixed through. The vehicle body (4) extends in the front-rear direction from substantially lower center in the front-rear direction of the vehicle body frame (4) to the rear lower part of the rear end of the vehicle body frame (4) so that the rear part is separated from the lower surface of the body cover (20). In the side view shown in FIG. 1, it is arranged in a slanting posture of front high and low going diagonally downward. Therefore, P
A space for passing the PTO transmission shaft (158) having the universal joint (159) connected to the TO shaft (65) can be widened, and the universal joint (159), the PTO transmission shaft (158), and the like can be provided. It is possible to arrange with. In addition, a PTO transmission shaft (158) is provided on the upper surface of the transmission case (6).
A support member (160) for supporting the PT is provided.
Since both ends of the O transmission shaft (158) are supported by the same transmission case (6), the concentric accuracy can be easily increased.

A transmission chamber (60) in which a traveling transmission mechanism is provided is formed at the front of the transmission case (6), and a front axle case (3) is provided on both left and right sides of the transmission chamber (60).
7) is integrally fixed. The axle case is fixed downward from the left and right ends of the front axle case (37), and a front wheel axle (66) for fixing the front wheel (2) is supported at the lower end of the axle case. . A cylindrical rear axle case (38) having a shaft center in the left-right direction is integrally formed at the rear end of the transmission case (6), and the rear wheel drive shaft (6) is provided in the rear axle case (38).
9) is supported. And the rear wheel drive shaft (69)
Rear wheels (3) are fixed to both left and right end portions of the vehicle, and the conventional transmission case is eliminated. As described above, when the front axle case (37) and the rear axle case (38) are provided integrally with the transmission case (6), the wheels (2) and (3) can be supported by the transmission case (6). Thus, the burden on the body frame (4) can be reduced.

As shown in FIGS. 2 to 4, a transmission chamber (60) in which a transmission mechanism and a PTO shaft (65) are disposed is provided at the front portion of the transmission case (6) which protrudes vertically. Is formed, and the transmission chamber (60) bulged upward is formed.
PTO shaft (65) with front and rear axis center
Is supported. As described above, the transmission case (6) has a rear side one step lower than the rear part of the transmission chamber (60), that is, the upper rear part of the transmission chamber (60) has a shape bulging upward from the rear upper surface of the transmission case (6). The PTO is formed rearward from the rear surface of the swelled transmission chamber (60).
The rear end of the shaft (65) protrudes. An input shaft (56) is supported in the upper part of the transmission chamber (60) of the transmission case (6) in the left-right direction. The left end of the input shaft (56) projects outward, and a driven pulley (55) is fixed. As shown in FIGS. 4 and 5, power from a drive pulley (53) fixed to an output shaft (52) protruding laterally from the left side surface of the engine (5) is supplied to a belt ( 54) is input into the mission case (6). The belt (54) is configured to be tensioned by a tension roller (58) attached to the tip of a tension arm (57), so that the main clutch pedal (74) is depressed or the main clutch lever (76) is depressed. The connection and disconnection of the power is performed in conjunction with the shift operation of ()).

A main transmission shaft (6) is provided in front of and below the input shaft (56).
1) is supported, and a front wheel drive shaft (62) is supported in front of and below the main transmission shaft (61), so that the power input to the input shaft (56) is transmitted substantially in front of and below. ing. The front wheel shaft (66) of the front wheel (2) is connected to the front wheel drive shaft (6).
The input shaft (56) is disposed vertically below 2).
A power transmission path is configured to transmit the power in a straight line vertically downward. For this reason, the power transmission path can be shortened, a simple configuration with less power loss can be achieved, and the length of the axle case in the vertical direction can be shortened, so that the cost can be reduced. Has become. A sub-transmission shaft (63) is supported in front of the input shaft (56) and above the main transmission shaft (61), and the input shaft (56) and the main transmission shaft (61) are supported in a side view. The transmission case (6) is arranged in a substantially isosceles triangular shape having the transmission shaft (63) as an apex, thereby simplifying the configuration inside the transmission case (6). The driving force to the rear wheel drive shaft (69) for driving the rear wheel (3) is transmitted from the main transmission shaft (61) between the input shaft (56) and the front wheel drive shaft (62) to the chain (7).
0) through the rear of the transmission case (6) to the rear axle drive unit, and a power transmission path is formed in the front high, rear low direction, which is the direction in which the transmission case (6) is disposed.

[0010] That is, the rear axle drive section at the rear of the transmission case (6) has a driven shaft (67), a counter shaft (68), and a rear wheel drive directed rearward and downward along the direction of disposition of the transmission case (6). A shaft (69) is arranged in order, and power is transmitted to a driven shaft (67) via a chain (70), and power is transmitted to a rear wheel drive shaft (69) via a counter shaft (68). In addition, the drive transmission path to the rear wheel drive shaft (69) is straightened from front to rear and low according to the direction of disposition of the transmission case (6), and the arrangement of the power transmission path is simple, space-saving and efficient. And In addition, since this power transmission path is the shortest path, the length of the chain (70) can be shortened and cost can be reduced. Further, the height position of the rear wheel drive shaft (69) is Since the rear wheel (3) is located at a position lower than the frame (4), the diameter of the rear wheel (3) can be reduced, and the size of the traveling vehicle can be reduced. Here, the chain (70) is used as a configuration for transmitting power to the rear axle drive unit, but the means for transmitting power is not limited to an endless body such as the chain (70).
A transmission shaft can also be used.

A power connecting / disconnecting mechanism and a braking mechanism are disposed on a rear axle driving portion at a rear portion of the transmission case (6), and a boss portion (101) is fixedly provided at the left and right central portions of the driven shaft (67). And a sprocket (1) is provided on the outer peripheral surface of the boss (101).
00) is fixed and the chain (70) is wound. A sliding gear (102) is spline-fitted to the driven shafts (67) on both left and right sides of the boss (101), and the sliding gear (102) and the side clutch (103) have the same number of teeth. It is integrally molded to reduce the number of parts and to facilitate assembly. An inner gear (104) pivotally supported by a counter shaft (68) is engaged with the sliding gear (102), and a rear wheel drive shaft (69) is engaged with an outer gear (105) integrally formed with the inner gear (104). ) Is engaged with the gear (106).

A fork fixed to an operation shaft (107) pivotally supported on the lower surface of the transmission case (6) is fitted to the sliding gear (102), and an arm (10) fixed to a lower portion of the operation shaft (107). 108), the operation shaft (1) is rotated.
07) rotates, and the sliding gear (102) is slid. When the sliding gear (102) is slid inward, the sliding gear (1) is moved.
02) The inside is engaged in the boss portion (101) to transmit power, and the rear wheel drive shaft (69) is driven. When the sliding gear (102) is slid outward, the boss (101) is disengaged from the sliding gear (102), power transmission is released, and at the same time, the sliding gear (102) is disengaged. A brake mechanism (130) constituted by a pad formed at the outer end and a holding body is operated, the rotation of the sliding gear (102) is braked, and the rotation of the rear wheel drive shaft (69) is stopped. You.

A PTO input shaft (64) is supported behind the input shaft (56), and a transmission shaft having a shaft center in the front-rear direction from the PTO input shaft (64) via bevel gears (64a) (65a). (65b), the power is transmitted to the PTO shaft (65) via the PTO clutch (109), and the power is transmitted horizontally rearward from the input shaft (56). Power is transmitted to the attachment part (9). A gear clutch is used for the PTO clutch (109) for connecting and disconnecting power to and from the PTO shaft (65), and the transmission shaft (65b) has a tubular body (65c) at the center in the front-rear direction. The clutch gear (11) is fitted to the front of the transmission shaft (65b) to which the cylindrical body (65c) is not loosely fitted.
0) is fixed, and a sliding clutch gear (111) is spline-fitted to the front part of the cylindrical body (65c).

A sliding clutch gear (111) is fitted with a fork fixed to an operation shaft (112) which is supported by the side surface of the transmission case (6), and the operation shaft (112) of the driver's seat (7). The planting elevating lever (77), which also serves as a PTO clutch lever disposed in the vicinity, is interlocked and is operated. By operating the planting elevating lever (77), the clutch gear (110) and the sliding clutch gear (111) are operated. And the power of the transmission shaft (65b) is shifted to the rear PTO shaft (65).
It is transmitted to. In addition, the cylindrical body (65c)
Rear sliding clutch gear of gear type clutch (113)
Is slidably fitted with a spline, and a compression spring (114)
The PTO is urged in a direction in which it meshes with a clutch gear (115) fixed to the front of the PTO shaft (65).
A safety clutch (116) for transmitting power to the shaft (65) is formed. When a load is applied to the power transmission mechanism on the planting section (9) side, the safety clutch (116) releases power transmission on the transmission case (6) side. The configuration is simple.

A traveling gear (117) is provided on the input shaft (56).
And a reverse gear (120) are fixedly mounted, and a sub-transmission shaft (63) is provided.
, A first transmission gear (118) and a second transmission gear (119) for traveling are fixedly provided. Also, PTO shaft (65)
Is transmitted via a transmission mechanism in which the power of the input shaft (56) is shifted between the stocks, and the conventional planting transmission case is eliminated. That is, a first reduction gear (121) projecting laterally from the side surface of the transmission case (6) and performing the inter-stock shift is fixedly mounted at an end of the input shaft (56), and an end of the PTO input shaft (64). A second reduction gear (122) that protrudes laterally from the side surface of the transmission case (6) and performs the inter-stock shift is also fixed to the portion, and the second reduction gear (1) is provided.
By interlocking the first reduction gear (121) with the first reduction gear (22), inter-stock shift is performed and power to the PTO shaft (65) is transmitted. Also, the first reduction gear (12
The side surfaces of 1) and the second reduction gear (122) are detachably covered with a cover (123), and the first reduction gear (121) and the second reduction gear (12) can be easily removed by removing the cover (123).
2) can be rearranged, and inter-stock shifts can be performed according to specifications. When the transmission mechanism of the planting section (9) is arranged in the transmission case in this way, the configuration of the planting section (9) can be made simpler.

A traveling transmission gear (124) slid in the axial direction is spline-fitted to the main transmission shaft (61) disposed in front of and below the input shaft (56). 124) is a large-diameter gear (125) and a small-diameter gear (12).
6) and a gear integrally fixed in the horizontal direction, and is fitted to a fork that slides in the left and right direction in conjunction with the operation of the main transmission lever (75). Main transmission shaft (6
A power split gear (127) in which a sprocket and a gear are integrated is fixedly provided on the left side in the front and rear direction of the transmission case (1). The gear of the power split gear (127) has left and right front wheel drive shafts (62). ) Differential mechanism (128) for driving
And the power is split in two directions using a power split gear (127). A differential lock mechanism (129) is arranged on the side of the differential mechanism (128).

When the main transmission lever (75) is rotated forward from the neutral position, the traveling transmission gear (124) is slid to the left in the front-rear direction of the transmission case, on the small-diameter gear (126) and on the auxiliary transmission shaft (63). Is engaged with the second transmission gear (119) to rotate the main transmission shaft (61) at a high speed.
Normal traveling in which the wheels (2) and (3) are rotated at high speed is performed. When the main transmission lever (75) is rotated one step backward from the neutral position, the traveling transmission gear (124) slides to the right in the front-rear direction of the transmission case, and the large-diameter gear (12) is rotated.
5) and the first transmission gear (118) on the auxiliary transmission shaft (63) are meshed, and the main transmission shaft (61) is rotated at a low speed to drive the wheels (2) and (3) at the working speed; A two-stage shift is performed on the forward side.

When the main transmission lever (75) is rotated backward, the traveling transmission gear (124) is further slid to the right in the front-rear direction of the transmission case, and the reverse gear (120) on the input shaft (56) is moved. The main transmission shaft (61) is engaged with a gear (not shown) on the main transmission shaft (61), and the main transmission shaft (61) is rotated in the reverse direction to rotate the wheels (2) and (3) backward. As described above, the input shaft (56) is used as a counter shaft having a reverse gear, and the transmission mechanism in the transmission case is configured as a PTO.
Even with a simple transmission mechanism omitting the PTO counter shaft, which is an input shaft to the side, it is possible to perform the minimum necessary traveling shift such as normal traveling, work traveling, and reverse traveling.

The left and right brake rods (131) are located inward of the front lower end of the transmission case (6), that is, in the lower part of the transmission chamber (60) and in front of the suction (156).
A through-hole (133) for passing a brake shaft (132) for operating the transmission case (6) is provided.
To support the brake mechanism. The brake mechanism includes a one brake mechanism having one brake pedal and a two brake mechanism having two brake pedals.
In the case of a brake mechanism, when the brake pedal (73) is depressed, the brake shaft (13)
2) is rotated, and both brake rods (131) interlockingly connected to the brake shaft (132) are simultaneously operated, and both arms (108) interlockingly connected to the rear end of the brake rod (131) are both turned. At the same time, the sliding gear (102) slides to the left and right sides to release power transmission, and at the same time, both brake mechanisms (130) operate to brake the left and right rear wheel drive shafts (69). The traveling vehicle (1)
Is to be stopped.

In the case of a two-brake mechanism, FIG.
As shown in FIG. 7, the brake pedal (7
When any one of 3a) and 73b is depressed, one of the cylinders of the brake shaft (132) composed of a double cylinder is rotated in conjunction with the operation. The left and right brake rods (131) interlockingly connected to the cylinder body are separately operated, and the left and right brake mechanisms (130) are separately operated. When you want to apply brakes, use the left and right brake pedals (7
A connector (135) for connecting 3) is used.

As shown in FIG. 5, a main clutch lever (76) is provided in the vicinity of a main clutch pedal (74) disposed on the left side in the body traveling direction, and a main clutch pedal (74) is provided. The tension of the belt (54) for transmitting power from the engine (5) into the transmission case (6) is turned off by operating the main clutch lever (76).
It is configured to be in a state. That is, when the main clutch lever (76) is turned rearward in the direction of the arrow shown in the figure, the interlocking rod (140) moves downward, and a fitting member such as a pin inserted into the elongated hole (140a) is inserted. The tension arm (57) is rotated downward via (143), and the tension roller (58) attached to the tension arm (57) is moved to the belt (54).
, So that the belt tension is turned off. Then, when the main clutch pedal (74) is depressed, a pressing member (145) such as a pin attached to an L-shaped bracket (144) fixed to the pedal support (74a) causes the rotation of the tension arm (57). Dynamic axis (5
The tension arm (57) is rotated downward by pressing the cam (146) fixed to 9), whereby the belt tension is set to the "off" state.

Further, a brake member (147) for stopping rotation of the driven pulley (55) on the transmission case (6) side is fixed to the tension arm (57), and the brake member (147) is By rotating the tension arm (57) downward, the driven pulley (55) is pressed to stop its rotation, and the entire body is braked. Moreover, the brake member (147) operates only when the main clutch lever (76) is operated to set the belt tension to the "off" state, and is deactivated when the main clutch pedal (74) is depressed. Is configured. Therefore, the traveling vehicle (1) can be stopped on a slope, and the vehicle does not stop suddenly at high speed even if the main clutch pedal (74) is depressed, so that it is safe.

Next, the planting section (9) will be described in detail. As shown in FIG. 1, the planting section (9) is composed of a seedling table (91), a plurality of planting claws (93), etc., which are planted in four rows, and the seedlings arranged at the front and rear high. The mounting table (91) is supported by the planting transmission frame (92) via a lower rail (95) and a guide rail (96) so as to be reciprocally slidable left and right. A hitch (94) is provided at the front of the planting transmission frame (92) through a rolling fulcrum shaft (176), and the hitch (94) is pivotally supported on the upper left and right sides of the hitch (94). Top link (11) and hitch (9
4) Lower link (1) pivotally supported on the lower left and right sides
2) is connected to the rear part of the traveling vehicle (1) via a lifting link mechanism (10) including:

A base of a lift arm (13) is fixedly provided on the inner surface of the front end of the lower link (12), and the lift arm (13) is positioned at right angles to the direction in which the lower link (12) is arranged. It protrudes in the direction. An elevating cylinder (15) for driving the elevating link mechanism (10) to elevate and lower is connected to a lift arm (13) connected to the lower link (12). A reinforcing link (14) is connected between the upper end of the lift arm (13) and the rear end of the lower link (12) so as to increase the rigidity of the lower link (12). And
The front ends of the top link (11) and the lower link (12) are pivotally supported via pivot pins provided between the rear connecting frames (44).
4) is also used as a support portion of the lifting link mechanism (10), thereby stably lifting and lowering the planting portion (9), reducing the number of parts, and simplifying the configuration.

Further, a center float (97) for leveling and a side float (98) for holding the planted portion (9) at a constant height are provided below the planted portion (9). The center float (97) is arranged on the left and right center lines of the traveling vehicle (1), and the side floats (98) are arranged at symmetrical positions of the center float (97). The balance is kept good, the planting posture is stabilized, and the planting can be performed accurately. A planting depth adjusting shaft (161) is provided horizontally below the planting transmission frame (92), which is a power transmitting unit of the planting unit (9), in accordance with the width of the left and right side floats (98). A support arm (162) protrudes toward the rear of each float below the proper position of the planting depth adjusting shaft (161) and is pivotally supported on the rear of each float. The operation arm (163) projects further forward, and a planting depth setting lever (79) is provided above the rear end of the operation arm (163). Therefore, the operator can easily operate the planting depth setting lever (79) while sitting in the driver's seat (7), and can easily adjust the setting.

When the planting depth setting lever (79) is operated, the rear end of the support arm (162) moves up and down about the planting depth adjusting shaft (161), and each float and the planting depth adjusting shaft (161) are moved. ), The height of the planting portion (9) is moved up and down, so that the seedlings cut by the planting claws (93) can be planted at a certain depth. A planting number control lever is disposed substantially symmetrically with the planting depth setting lever (79). A lever guide (191) is provided which is fixed to the upper support frame (190) shown at 8, so that each lever penetrates through the lever guide and is engaged with a latch formed on the lever guide. It has become. In addition,
(194) is a vertical feed roller, (195) is a vertical feed belt, and the vertical feed roller (194) is driven intermittently so that the seedling mat is intermittently and precisely fed vertically. Have been.

Since the planting part (9) is for four-row planting,
As shown in the figure, four rotary cases (81) are provided, and transmission pipes (164) for transmitting the driving force to the planting claws (93) are provided one by one on the left and right. The front of the transmission pipe (164) is connected to the connecting pipe (1).
66), and a plano-view type planting transmission frame (9)
2) is integrally formed, and the open side of the portal is turned rearward, and a cross-shaped pipe joint (16) having rotary cases (81) provided on the left and right sides at the left and right open side ends.
9) is integrally formed at the rear end of the planting transmission case (16).
5) is connected. A transmission shaft (184) and a transmission shaft (186) constituting a power transmission mechanism to the rotary planting device (80) are provided inside the transmission pipe (164), the connection pipe (166), and the planting transmission case (165). ) (18
7) and the drive shaft (185) shown in FIG. 9 are rotatably supported.

The transmission pipe (164) and the connecting pipe (166) constituting the planting transmission frame (92), and the pipe part on the front side of the planting transmission case (165) are cylindrical metal pipes, for example, iron pipes. The transmission pipe (164) and the connection pipe (166) are connected by a cross-shaped pipe (167) (168), and the cross-shaped pipe (167) (168) is a vertical pipe (167a).
(168a) and horizontal pipes (167b) (168b). Further, a flange (164a) is formed at the rear end of the transmission pipe (164), and the flange (165a) at the front end of the planting transmission case (165) and the flange (164a) are attached to a mounting tool such as a bolt. (170)
Are linked by

The planting transmission frame (9)
According to 2), the number of parts is reduced, the manufacturing cost is low, and the rigidity is high, but the weight is reduced. Therefore, the weight of the entire planting portion (9) can be reduced, and the lifting link mechanism ( 10) and the burden on the vehicle body frame (4) can be reduced. Also, a cross-shaped pipe (167) (168)
Is welded and fixed to the connecting pipe (166) and the transmission pipe (164), and the planting transmission frame (92) can be integrally formed, so that the number of assembling steps can be reduced. As shown in FIG. 10, the transmission pipe (164)
By extending the rear part of the plant, the pipe portion of the planting transmission case (165) is eliminated, and the front end of the cross-shaped pipe joint (169) is directly fixed to the transmission pipe (164) by welding.
Planting transmission frame (92) and planting transmission case (165)
For example, the outer rotary case mounting flange portion (81a) is welded to the cross-shaped pipe joint (169) and mounted, and the inner rotary case mounting flange portion (81a) is formed. 81b) is a cross-shaped pipe joint (16
It may be configured to be attached to the flange portion (169a) of 9) by a fixture (171) such as a bolt.
This also provides the same effect. Of course, the inner side may be welded and the outer side may be attached by a fixture.

The rotary planting device (80) is conventionally known, and as shown in FIG.
A rotary case (81) is fixed to a drive shaft (185) rotatably supported by a cross-shaped pipe joint (169) of (65), and the rotary case (81) is connected to the drive shaft (18).
By the rotation drive of 5), the motor rotates at a constant speed in the counterclockwise direction in the side view of FIG. A pair of planting claw cases (82) are disposed at positions symmetrical about the rotation axis of the rotary case (81), and the pair of planting claw cases (82) are planted at the tips of the planting claw cases (82). Nail (93)
Is attached.

The rotary case (81) is formed in a hollow shape and can be vertically divided into two parts. A sun gear (83) is fitted to the drive shaft (185). An intermediate gear (84) meshing with the sun gear (83) and having the same number of teeth as the sun gear (83) is loosely fitted to the intermediate shaft (86) and is rotatably provided. A rotary arm shaft (88) is loosely fitted to a rotary cam shaft (87) as a drive shaft. And this rotary arm shaft (8
8) is always meshed with the intermediate gear (84) and has the same number of teeth as the intermediate gear (84) and the sun gear (83).
5) is fitted.

The sun gear (83), the intermediate gear (84), and the planetary gear (8) constituting such a planetary gear mechanism.
5) is a non-circular gear having no center and focus, and the intermediate gear (84) and the planetary gear (85) are configured as double gears in which a main gear and a sub gear are arranged to overlap. A ring spring or the like is provided on the side of the sub gear so as to engage with a pin protruding from the main gear and the sub gear of the planetary gear (85) so that the main gear and the sub gear of the planetary gear (85) are shifted from each other. And the sub gears of the intermediate gear (84) and the planetary gear (85) mesh with each other to prevent backlash of the planetary gear (85).

The planting claw case (82) is fixed to a rotary arm shaft (88) loosely fitted on a rotary cam shaft (87) so that the posture thereof can be adjusted. A rotary case (81) as a rotating body is provided. The drive shaft (1
85), the intermediate gear (84) meshing with the sun gear (83) rotates in the same direction as the rotation of the rotary case (81) by the same rotation angle as the rotation of the rotary case (81). The planting claw case (82) interlocking with the planetary gear (85) via the rotary arm shaft (88) with the planetary gear (85) rotates in the opposite direction to the rotation direction of the rotary case (81) due to the rotation of the intermediate gear (84). Orbit in the direction. Then, in a state where the planting claw case (82) faces the seedling mounting table (91), the planting claw case (82) pivots around the drive shaft (185), and the planting claw (93) facing the seedling mounting table (91). ) Descends from the top to the bottom, and divides and holds one seedling from the seedling mat on the seedling mounting table (91) at the tip of the planting claw (93). The plant is planted in the field scene at the lower limit of descent in the turning motion.

As described above, all of the sun gear (83), the intermediate gear (84), and the planetary gear (85) constituting the planetary gear mechanism are non-circular gears having no center and focus. As shown in FIG. 1, the static trajectory in which the tip of the planting claw (93) pivots is a closed loop of a curved elliptical curve on the front side where the seedlings are planted and a rear side after the planting of the seedlings is closer to a straight line. The planting claw (93) rises rapidly from the field scene immediately after planting the seedlings. According to such a rotary planting device (80), the front wheel (2) and the rear wheel (3) are driven to move and move while moving the seedling mounting table (91) reciprocally slidable left and right. Seedlings are continuously taken out with the planting nails (93), and the seedlings can be planted quickly and accurately. Of course, instead of the rotary planting device (80), the planting claw can be constructed by cranking and planting by a crank mechanism.

Also, such a rotary planting device (8
0) is provided with a unit clutch (150) for stopping only the inner or outer rotary case,
Cross fitting (169) is unit clutch (150)
The horizontal pipe on the side where is provided is formed to be long, and a through hole (134) for inserting the unit clutch pin (151) is formed. That is, FIG.
As shown by, a protrusion (169b) is provided on the upper surface of the cross-shaped pipe joint (169), and a through hole (134) is formed in the protrusion. With such a configuration, it is possible to provide a unit clutch mechanism while maintaining the advantages of the pipe frame structure.

The unit clutch pin (151) is for releasing the engagement of the unit clutch (150) so as to prevent rotational power from being transmitted to the rotary case (81) on one side (in the figure, on the inside). When the unit clutch pin (151) is inserted toward the drive shaft (185), the tapered surface at the tip of the pin (151) is fitted to the drive shaft (185).
0), descending while abutting on the flange portion (152),
The unit clutch (150) is slid in the direction in which the engagement is released (in the illustrated example, inward) to disengage the bevel gear (185a) from the boss (183), and the rotary planting device (80) is disengaged. ) Is removed.

As shown in FIGS. 8 and 10, the center (slightly leftward in the drawing) of the connecting pipe (166) which does not interfere with the rolling fulcrum shaft (176) is connected by a cross-shaped pipe (172). And its cross-shaped pipe (17
An input shaft (136) is supported inside 2). A bevel gear (1) is provided in the middle of the input shaft (136).
36a) is fixed, and the bevel gears (186a) and (187a) mesh with the bevel gear (136a).
The left and right transmission shafts (186) and (187) are driven to rotate. Then, the transmission shaft (186) (18)
7), the left and right transmission shafts (184) are driven to rotate via bevel gears (186b) (187b) and bevel gears (184a), and are fixed to the rear end of each transmission shaft (184). Bevel gears (184
b) meshes with a bevel gear (185a) fixedly provided in the middle of the drive shaft (185) to rotate the drive shaft (185). Therefore, an efficient and simple power transmission mechanism without power loss is realized.

When the input shaft (136) is disposed substantially at the center of the connecting pipe (166), the universal joint (159) of the PTO transmission shaft (158) and the planting transmission shaft (157) and the planting transmission shaft (157) are connected. The load does not need to be applied to the universal joint (159) of the transmission shaft (157) and the input shaft (136). That is, when the input shaft (136) on the side of the planting section (9) is provided at such a position, as shown in FIG. 10, the angle of the planting transmission shaft (157) with respect to the PTO transmission shaft (158). Since (α) can be connected to the input shaft (136) without increasing, the universal joint (159) is not overloaded and its durability is improved. In addition, since the planting transmission shaft (157) can be separated from the rear wheel (3), safety can be increased.

At this time, as shown in FIGS. 11 to 14, the transmission case (6) on the side where the input shaft (136) is provided (the left side in the drawing) is
It is more preferable to take out the O-axis (65). That is, for example, the PTO input shaft (64) is extended so as not to interfere with the chain (70), and a gear (30) is fixed to the tip of the PTO input shaft (64), and a belt or a chain or a gear (31) is attached from the gear (30). Power is transmitted to the gear (32) to which the second PTO input shaft (35) is fixed via the second PTO input shaft (35), and the bevel gear (35a) is transmitted from the second PTO input shaft (35) to the PTO shaft (65) in the same manner as described above. ) (65
It is configured to transmit power via a). With such a configuration, the PTO shaft (65) is connected to the input shaft (13).
Transmission case with integral transmission path to 6) (6)
And the angle of disposition of the planting transmission shaft (157) is further reduced, so that the load on the universal joint (159) can be further reduced and the durability is improved. Can be.

The bevel gear (35a) of the second PTO input shaft (35) and the bevel gear (6) of the PTO shaft (65)
The area near the meshing of 5a) is covered with a cover (33) provided on the side surface of the transmission case (6). Also,
(139) is a support member for supporting the PTO transmission shaft (158). In this case, the rear side of the side of the transmission case (6) where the PTO shaft (65) projects, that is, the rear wheel drive shaft (69). The upper portion and the PTO transmission shaft (158) are provided so as to be located substantially in the middle of the vertical range of the rear end of the lower link (12) in side view. When the support member (139) of the PTO transmission shaft (158) is provided at such a position, the PTO transmission shaft (158) is moved to the rear wheel drive shaft (69).
Therefore, it becomes easier to set the PTO transmission shaft (158) when assembling the rice transplanter.

As shown in FIG. 8, the input shaft (13
If 6) is extended and protruded from the rear part of the cross-shaped pipe (172) so that it can be used as the second PTO shaft (155), it is possible to provide an auxiliary device such as a fertilizer. It should be noted that the second PTO shaft (155) is different from that shown in FIG.
, As shown in the left or right (shown on the right)
Of the transmission shaft (184) can be extended. In such a position, the second PTO shaft (1
When 55) is provided, power can be taken out with a simple configuration from the planting portion (9), and versatility is improved.

A support portion for supporting the drive case (173) and the upper support frame (190) is fixed to the planting transmission frame (92), and a cross arranged at the front of the left transmission pipe (164). A case support arm (174) protrudes forward and upward from the front of the mold pipe (168), and a horizontal shaft support arm (175) extends forward and upward from the right front of the connecting pipe (166). Case support arm (1
74). The upper support frame (1) is provided at the front of the planting transmission frame (92), that is, at the front of the cross-shaped pipes (167) and (168) arranged on the front side.
The bracket (177) to which the 90) is fixed is fixed. Therefore, the planting transmission frame (9) has a simple configuration in which the pipes are connected and has ample space.
The support for the drive case (173) and the transverse feed shaft (180) is firmly fixed to 2), and a durable support for vibration and impact is formed.

Further, the upper support frame (190) passes through the front of the transverse feed shaft (180) and extends upward, and the guide rail (95) is supported using the upper portion of the upper support frame (190). The planting transmission frame (92) and the upper support frame (190) are integrally connected to form a highly rigid frame that supports the planting portion (9). A drive case (173) is fixed to the outer surface of the case support arm (174), and a horizontal feed shaft (180) is provided at the front of the case support arm (174) and the front of the horizontal shaft support arm (175). Supported, the left end of the transverse feed shaft (180) is inserted into the drive case (173). The transverse feed shaft (180) is disposed in parallel with the connecting pipe (166), and the lateral feed shaft (180) is disposed above the rolling fulcrum shaft (176) in a side view, and the transverse feed shaft (180) is provided. Is simple and the arrangement is efficient.

The left end of the transmission shaft (187) in the connecting pipe (166) projects laterally from the cross-shaped pipe (168), is inserted into the drive case (173), and has a gear ( 188) is fixedly provided. Drive case (1
A gear (189) is also fixed to the left end of the transverse feed shaft (180) inserted in the gear (73), and the gear (188) and the gear (18) are fixed.
The seedling table drive mechanism that transmits power to the lateral feed shaft (180) by the meshing of 9) is configured. Further, a groove (180a) for sliding the slider is formed in the lateral feed shaft (180), and a slider receiver is loosely fitted on an outer peripheral surface of the lateral feed shaft (180), and is inserted into the slider receiver. The attached slide is fitted into the groove (180a), and the transverse feed shaft (180) is inserted.
With the rotation of, the slider slides in the groove (180a), and the slider receiver reciprocates right and left on the transverse feed shaft (180). Then, the seedling rest (91) is connected to the rear part of the slider holder via a connecting part, and the seedling rest (91) can be accurately reciprocated right and left by the rotation of the transverse feed shaft (180). I have.

[0045]

According to the present invention, an integral transmission case is formed so as to extend in the longitudinal direction of the fuselage, and has a traveling transmission mechanism internally provided at the front and a rear wheel drive shaft supported at the rear. Since the PTO shaft for transmitting power to the planting portion is provided, the transmission path from the PTO shaft to the planting portion-side input shaft becomes a straight line substantially parallel to the extending direction of the integrated transmission case. The angle at which the transmission shaft is attached is reduced, so that the load on the universal joint can be reduced, and the durability can be improved. And since the support member of the PTO transmission shaft connected to the PTO shaft is provided in the transmission case above the rear wheel drive shaft, the PTO transmission shaft does not interfere with the rear wheel drive shaft, and furthermore, the PTO transmission shaft is The PTO transmission shaft can be easily set when assembling the rice transplanter, since it is located substantially in the middle of the planting section elevating area.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a riding rice transplanter.

FIG. 2 is a schematic side view showing a mechanism in a transmission case.

FIG. 3 is a schematic plan view showing a rear mechanism in the transmission case.

FIG. 4 is a schematic plan view showing a front mechanism in a transmission case.

FIG. 5 is a schematic side view showing a mechanism for transmitting power from an engine to a transmission case.

FIG. 6 is a schematic plan view showing a state of a two-brake mechanism.

FIG. 7 is a schematic side view showing a state of a two-brake mechanism.

FIG. 8 is a schematic plan view showing a mechanism in the planting transmission frame.

FIG. 9 is a schematic plan view showing a mechanism in the rotary planting apparatus.

FIG. 10 is a schematic plan view showing a power transmission path to a planting section side input shaft.

FIG. 11 is a schematic side view showing a power transmission path to a planting section side input shaft.

FIG. 12 is a schematic plan view showing a power transmission path to a planting section side input shaft.

FIG. 13 is a schematic side view of a transmission case.

FIG. 14 is a schematic plan view of a mission case.

[Explanation of symbols]

 6 Transmission case 65 PTO shaft 136 Input shaft 139 Supporting member 157 Planting transmission shaft 158 PTO transmission shaft 159 Universal joint part 166 Connecting pipe 186 Transmission shaft 187 Transmission shaft

Claims (3)

[Claims] 1. A riding rice transplanter having a planting portion disposed at the rear of the vehicle body so as to be able to move up and down, is formed so as to extend in the longitudinal direction of the vehicle body, has a traveling transmission mechanism internally provided at a front portion, and a rear wheel drive at a rear portion. On the side of the integrated transmission case that supports the shaft,
A rice transplanter for use in which a PTO shaft for transmitting power to a planting portion is provided. 2. The riding rice transplanter according to claim 1, wherein a support member for the PTO transmission shaft connected to the PTO shaft is provided in the transmission case above the rear wheel drive shaft. 3. The riding rice transplanter according to claim 2, wherein the PTO transmission shaft is located substantially in the middle of the ascending / descending area of the planting portion.