JP2002186315A - Transplanting part of rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanting part of rice transplanter capable of ensuring the clutching operation between a driving shaft extended in the nearly front and rear direction of a machine body, and a transplanting arm shaft interlockingly joined to a transplanting arm having a tine for transplanting seedlings. SOLUTION: The driving shaft extended in the nearly front and rear direction of the machine body, and the transplanting arm having the tine for transplanting seedlings are interlockingly joined through the clutch structure in the transplanting part of the rice transplanter having a transplanting machine connected to the rear part of a traveling machine body, and a transplanting structure for transplanting the seedlings, arranged at the transplanting machine. The clutch structure has a transmission gear meshing with a bevel gear at the terminal part of the driving shaft, freely rotatably fitted on the transplanting arm shaft, and a clutch-operating part for controlling the on and off of the connection between the transmission gear and the transplanting arm shaft, and arranged along the transplanting arm shaft so as to be freely slidable. A concave part in which at least the outer edge part of the clutch-operating part can be housed by isolating the part, is formed at the center part of the bevel gear at the terminal part of the driving shaft at the opposite side of the clutch-operating part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting portion of a rice transplanter, and more particularly, to a drive shaft extending substantially in the front-rear direction of a machine body.
The present invention is characterized in that a clutch mechanism is provided between a planting arm shaft having a planting arm having a planting claw and being interlocked to each other.

[0002]

2. Description of the Related Art When planting rice in a field, for example, when a 5-row planting type rice transplanter is used, it is sometimes desired to plant only 2 or 3 rows at the end of the field. At that time, the drive of three or two of the five planting arms having the planting claws is stopped by the following clutch mechanism. A rice transplanter with a planting machine connected to the rear of a traveling body equipped with a motor has a clutch mechanism with a drive shaft extending substantially in the front-rear direction of the aircraft and a planting arm shaft with an interlockingly connected planting arm. Some are interlocked and linked. In such a clutch mechanism, a transmission gear meshing with a bevel gear at an end of a drive shaft is rotatably and loosely fitted to a planting arm shaft, and a clutch which controls connection and disconnection of the transmission gear and the planting arm shaft. The operating body is slidably disposed along the axis of the planting arm. Here, the shape of the drive shaft end bevel gear on the side facing the clutch operating body has conventionally been flat. For this reason, the space between the bevel gear and the planting arm shaft could not be made large, and the size of the clutch operating body had to be limited. That is, since only a clutch operating body having a small diameter can be used, a sufficient contact area with a clutch operating member that is disengaged by sliding in contact with the clutch operating body can be secured, and the operation of the clutch becomes unstable. there were.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention relates to a method of manufacturing a vehicle comprising a drive shaft extending substantially in the front-rear direction of a machine body and a planting arm shaft in which a planting arm having a planting claw is interlocked. An object of the present invention is to provide a planting portion of a rice transplanter that ensures the operation of a clutch.

[0004]

The present invention has the following configuration to achieve the above object. That is, in the planting section of a rice transplanter in which a planting machine is connected to the rear portion of the traveling body and a planting mechanism for planting seedlings in the planting machine is provided, a drive shaft extending substantially in the front-rear direction of the body, A planting arm shaft, which has a planting arm having a planting claw, is interlockingly connected via a clutch mechanism. The clutch mechanism has a transmission gear that meshes with a bevel gear at the end of the drive shaft. A clutch actuating body that is rotatably and loosely fitted to the attached arm shaft, and that connects and disconnects the transmission gear and the planted arm shaft, is slidably disposed along the planted arm shaft, and At the center of the drive shaft end bevel gear on the side facing the clutch operating body,
At least an outer edge portion of the clutch operating body is provided with a recess that can be accommodated.

[0005] Here, the outer edge of the clutch operating body most protruding toward the drive shaft end bevel gear side is separated from the locus drawn when sliding along the planting arm axis by a predetermined distance, and the drive shaft end bevel gear is moved. A flat portion is provided at the center of the shaft, and a side edge portion bent from the flat portion toward the peripheral portion is continuously provided to secure a sliding area of the clutch operating body and to contribute to a reduction in weight and size of the bevel gear. You may.

[0006]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a side view of a main part of the riding rice transplanter. The outline of the riding rice transplanter is as follows. An engine (12) is provided at a front part and a transmission case (13) is provided at a rear part of a body frame (11) of a traveling vehicle body (10) on which an operator rides, and a front axle case is provided at both front sides of the transmission case (13). (14)
A paddy field traveling front wheel (15) is supported via a rear wheel, and a paddy field traveling rear wheel (17) is supported via a rear axle case (16) on both rear sides of the transmission case (13). The engine (12) and its surrounding members are covered with a bonnet (18), and the transmission case (1
3) and members in the vicinity thereof are covered with a vehicle body cover (20) having a step (19). A driver's seat (21) is mounted above the vehicle body cover (20), and a steering handle (22) is provided in front of the driver's seat (21).
Is provided.

[0007] At the rear of the traveling vehicle body (10), a planting section (30) having a seedling mounting table (31) for multiple planting and a plurality of planting claws (32) is connected. The planting section (30) is connected to the traveling vehicle body (10) using a three-point lifting link mechanism including a top link (33) and a lower link (34). And it is configured to be able to move up and down by a telescopic operation of a hydraulic cylinder interposed between the rear part of the traveling vehicle body (10) and the lower link (34). In addition, the plate-shaped forward tilting seedling mounting table (31) installed at the front and rear heights is lower than the planting transmission case (37) via the lower guide rail (35) and the upper guide rail (36). It is slidably supported back and forth. Below the planting transmission case (37), central and left and right planting floats (38)
(39) is supported via a planting depth adjusting member. The planting part (30) is lowered and this float (3
8) By landing (39), the seedling mounting table (31)
It is configured to set the planting depth of the seedlings to be taken out from the seedling mat on the top.

FIG. 2 is a partially cutaway plan sectional view showing the planting mechanism of the planting section (30). In the planting transmission case (37), three pipe-shaped front-rear extension frames (4) are disposed at intervals in the left-right width direction of the body and extend in the front-rear direction.
3) (44) and (45) and the front and rear extension frames (4)
3) Two pipe-shaped left and right extending frames (4) which are installed between the front ends of (44) and (45) and extend in the left and right width direction.
6) (47) and each front and rear stretched frame (43) (44)
(45) A pipe-shaped rear end frame (48) (49) (50) is provided continuously to the rear end and extends in the left-right width direction. As described above, in this embodiment, the transmission case of the planting mechanism is formed in the shape of a pipe frame to reduce the weight and cost.

The front and rear stretching frames (43), (44) and (4)
5), the drive shafts (51), (52), and (53) are rotatably housed, respectively, while the left and right extending frames (46) are provided.
The interlocking shafts (54) and (55) are rotatably accommodated in (47), respectively, and the rear end frames (48) (49) (5)
0) has the planting arm shafts (56), (57), (5) respectively.
8) is rotatably accommodated. The PTO output shaft (41) projecting rearward from the transmission case (13) is connected to the transmission shaft (42) and the interlocking shafts (54) (5).
5), the driving shafts (51), (52), and (53) are operatively connected to each other through the driving shafts (51), (52), and (53).
The planting arm shafts (56), (57), (58) are interlockingly connected via the clutch mechanisms (59), (60), (61), respectively. In the figure, reference numeral 40 denotes a lateral feed mechanism for reciprocating the seedling mounting table (31) in the left-right width direction.
Thus, the planting transmission case (3
Inside 7), drive shafts (51) (52) (53), interlocking shafts (54) (55), planting arm shafts (56) (57)
(58) are interlocked to simplify the power transmission structure of the planting mechanism, and reduce the size and weight of the planting mechanism and reduce the manufacturing cost.

[0010] Each planting arm shaft (56) (57) (58)
, Through the front cranks (62), (63), (64), the planting arms (65), (6) having the planting claws (32).
5 ′), (66), (67), and (67 ′) are interlocked and connected, and the planting arms (65), (65 ′), (66), (67), (6).
7 ′) is provided with rear cranks (68), (69), (7).
0) through the rear end frame (48) (49) (50)
(71), (72), (7)
3) It is connected to the rear end.

Each clutch mechanism (59) (60) (61)
Have the same structure, and a plan view and a front sectional view of one of the clutch mechanisms (59) are shown in FIGS. In the clutch mechanism (59), the drive shaft (51)
The transmission gear (7) meshing with the bevel gear (74) at the end of the
5) is rotatably and loosely fitted to the planting arm shaft (56), and a clutch operating body (77) responsible for connecting / disconnecting the transmission gear (75) and the planting arm shaft (56) is planted. It is slidably disposed along the attached arm shaft (56). The clutch operating body (77) and the planting arm shaft (56) are interlocked and connected by spline fitting.

The clutch operating body (77) is driven by a transmission gear (7) by a spring (76) which is an embodiment of an elastic body.
When the clutch pawl (77a) is engaged with the engaging portion (75a) of the transmission gear (75), the transmission gear (75) and the planting arm shaft (56) are urged toward the transmission gear (75). And the clutch operating body (77) is slid in the direction away from the transmission gear (75) against the spring (76), and the clutch pawl (77a) and the transmission gear (75)
When the engagement with the engaging portion (75a) is released, the transmission gear (75) and the planting arm shaft (56) are disconnected. In this embodiment, the clutch pawl (77) of the clutch operating body (77) is provided on a part of the tooth surface of the transmission gear (75).
Since the engaging portion (75a) to be engaged with (a) is formed integrally with the transmission gear (75), there is no need to separately provide a member for engaging with the clutch pawl (77a). The clutch mechanism (59) can be reduced in size and weight as well as reduced.

A clutch operating member (79) is attached to an opening (48a) provided above the rear end frame (48) via a clutch operating member support (78).
Therefore, after the unit type clutch mechanism (59) is assembled inside the rear end frame (48), the clutch operating member support (7) to which the clutch operating member (79) is attached is attached.
8), the workability of clutch assembly is high.
The clutch operating member (79) protrudes and retracts in a direction perpendicular to the planting arm shaft (56). When the clutch operating member (79) protrudes, the operating claw (79a) at the tip thereof is engaged with the clutch operating body (7).
7) to act on the engaging portion (77b) to cause the clutch operating body (77) to oppose the spring (76) to the transmission gear (7).
Slide in the direction away from 5).

Here, the engaging portion (77b) of the clutch operating body (77) and the operating claw (7) of the clutch operating member (79) are used.
In order to secure a sufficiently large contact area with the clutch 9a) and stabilize the operation of the clutch, in the present invention, the bevel gear (74) at the end of the drive shaft (51) facing the clutch operating body (77) is used. A recess (74a) is provided at the center of the clutch operating body (77) so that at least the outer edge portion (77c) of the clutch operating body (77c) can be accommodated. The shape of the recess (74a) is determined by designing the shape of the drive shaft end bevel gear (74) as follows. That is, the drive shaft end bevel gear (7
4) The end of the outer edge portion (77c) of the clutch operating body (77) projecting most toward the side is separated from the locus drawn when sliding along the planting arm shaft (56) by a predetermined distance, so that the drive shaft end A flat portion (74b) is provided at the center of the part bevel gear (74), and a side edge portion (74c) that is bent from the flat portion (74b) to the periphery and has a substantially uniform thickness is continuously provided.
The side edge portion (74c) has a transmission gear (7
It is also a part that meshes with the engagement part (75a) of 5). When the flat portion (74b) is provided in the concave portion (74a) at the center of the bevel gear (74) at the end of the drive shaft, the sliding area of the clutch operating body (77) can be secured, and the flat portion (74) can be secured. (74b) Side edge portion with substantially uniform thickness (74c)
Are connected, it is possible to reduce the weight and size of the drive shaft end bevel gear (74).

FIG. 5 is a front view showing the back surface of the seedling mounting table (31). Planting arms (65) (65 ') (66) attached to each planting arm shaft (56) (57) (58)
(67) According to the radix of 2, 67 or (67 ′), the seedling mounting table (31) also has a seedling mounting table (31A) at a ratio of 2,2.
(31A '), (31B), (31C) and (31C'), which are subdivided into a seedling stage (31A) and a seedling stage (31A ');
In addition, the seedling mounting table (31C) and the seedling mounting table (31C ') are integrally formed. Therefore, the seedling mounting table (31A ') and the seedling mounting table (31B), and the seedling mounting table (31B) and the seedling mounting table (3
1C), the joints at the top of their rear surfaces are each provided with a clutch lever stand (8).
0) (80 ') are riveted as reinforcement.

These clutch lever bases (80) (8)
0 ′) includes clutch levers (81), (81 ′), (8).
1 ") and each clutch lever (81)
(81 ') and (81 ") have two wires (82)
(83) is connected. One wire (82)
The other wire (83) is connected to the above-mentioned clutch operating member (79) and controls the drive stop of the planting arm shafts (56), (57) and (58). It is linked to the drive stop control.

On the rear surface of the seedling mounting table (31), substantially along the upper guide rail (36), locking holes (86) (86) provided at substantially right and left ends of the seedling mounting table (31). ) And the seedling platform hitch (85) between the rolling compensator (87)
(87) is installed. Rolling correction body (87)
Is made of a linear body provided with an elastic body such as a spring, and recovers the rolling of the seedling mounting table (31) accompanying the rolling of the body during traveling. A substantially cylindrical rubber (88) is mounted on a halfway portion of the rolling corrector (87) as an example of a cushion. Therefore, noise and vibration due to the contact between the rolling corrector (87) and the upper guide rail (36) are suppressed.

[0018]

The present invention has the following effects by providing the above-described configuration. According to the planting portion of the rice transplanter according to claim 1, a drive shaft extending substantially in the front-rear direction of the body,
In a clutch mechanism between the planting arm shaft and the clutch operating member, a concave portion is provided at a central portion of the drive shaft end bevel gear on a side facing the clutch operating member so that at least an outer edge portion of the clutch operating member can be accommodated. . As a result, it is possible to use a clutch operating body with a diameter as large as possible, and it is possible to secure a sufficiently large contact area between the clutch operating member and the clutch operating member that contacts and disengages the clutch operating body, and stabilizes the operation of the clutch. Can be

According to the planting portion of the rice transplanter according to the second aspect, the flat portion is provided at the center of the bevel gear at the end portion of the drive shaft, and the side edge portion bent from the flat portion toward the periphery is continuous. Therefore, the sliding area of the clutch operating body can be secured, and the bevel gear can be reduced in weight and size.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a riding rice transplanter.

FIG. 2 is a partially cutaway sectional view showing a planting mechanism of a planting section.

FIG. 3 is a plan view of a clutch mechanism.

FIG. 4 is a front sectional view of the same.

FIG. 5 is a front view showing the back surface of the seedling mounting table;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Running vehicle body 11 Body frame 12 Engine 13 Transmission case 14 Front axle case 15 Front wheel 16 Rear axle case 17 Rear wheel 18 Bonnet 19 Step 20 Body cover 21 Driver's seat 22 Steering handle 30 Planting part 31-31C 'Seedling stand 32 Planting Claw 33 Top link 34 Lower link 35 Lower guide rail 36 Upper guide rail 37 Planting transmission case 38 Center level float 39 Right and left level float 40 Lateral feed mechanism 41 PTO output shaft 42 Transmission shaft 43-45 Front and rear extension frame 46- 47 Left and right extension frame 48-50 Rear end frame 48a Opening 51-53 Drive shaft 54-55 Interlocking shaft 56-58 Planting arm shaft 59-61 Clutch mechanism 62-64 Front crank 65-67 'Planting arm 68-70 rear Side crank 71 to 73 Support body 74 Bevel gear 74a Recess 74b Flat part 74c Side edge part 75 Transmission gear 75a Engaging part 76 Spring 77 Clutch operating body 77a Clutch pawl 77b Engaging part 77c Outer edge part 78 Clutch operating member support 79 Clutch Operation member 79a Operation claw 80-80 'Clutch lever base 80-81 "Clutch lever 82-83 Wire 84 Seedling vertical feed shaft 85 Seedling platform hitch 86 Locking hole 87 Rolling corrector 88 Rubber

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Koji Miyake 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka F-term in Yanmar Agricultural Machinery Co., Ltd. 2B062 AA01 AA14 AB01 BA13 BA16 3J056 AA03 AA62 BA04 BB22 BE06 CA02 CA14 CB05 CC03 CC13 CC42 CX04 CX23 DA16 GA22

Claims (2)

[Claims] 1. A driving device extending substantially in the front-rear direction of a machine in a planting section of a rice transplanter having a planting machine connected to a rear portion of a traveling machine body and a planting mechanism for planting seedlings in the planting machine. A shaft and a planting arm shaft interlockingly connected with a planting arm having a seedling planting claw are interlockingly connected via a clutch mechanism, and the clutch mechanism has a transmission that meshes with a bevel gear at the end of the drive shaft. The gear is freely rotatably fitted to the planting arm shaft,
A clutch actuating body for connecting / disconnecting the transmission gear and the planting arm shaft is slidably disposed along the planting arm shaft, and a drive shaft end on the side facing the clutch operating body. A planting part for a rice transplanter, characterized in that a central portion of a bevel gear is provided with a recess capable of accommodating at least an outer edge portion of a clutch operating body. 2. The bevel gear of the drive shaft end bevel gear, wherein the outer edge of the clutch operating body that protrudes most toward the drive shaft end bevel gear is separated from the locus drawn when sliding along the planting arm axis by a predetermined distance. The planting section of a rice transplanter according to claim 1, wherein a flat portion is provided in a central portion, and side edge portions bent from the flat portion toward the periphery are continuously provided.