JP2530354Y2 - Power transmission structure of planting part power in walking type 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 power transmission structure of a planting portion in a walking transplanter such as a walking rice transplanter.

[0002]

2. Description of the Related Art
In this type of walking transplanter, the planting power output from the transmission is transmitted through a power distribution shaft equipped with a planting clutch to a planting drive mechanism for the planting claw and a lateral feed driving mechanism for the seedling mounting table. Some are configured to be distributed to. Conventionally, however, the power distribution shaft is provided at a planting portion at the rear of the fuselage, and power is transmitted to a planting drive mechanism and a lateral feed driving mechanism similarly provided at the planting portion. Therefore, the members are concentrated on the planting part, and as a result, the structure of the planting part is complicated and maintenance is inferior, or the balance between the front and rear of the aircraft is impaired, adversely affecting running stability and planting accuracy There is a problem. Therefore, it is conceivable to install the lateral feed drive mechanism together with the planting drive mechanism in the front transmission case, but in this case, a transmission mechanism for transmitting the lateral feed power of the lateral feed drive mechanism to the seedling mounting table is required. Required. However, since both the lateral feed drive mechanism and the seedling mounting table move in the left-right direction, the transmission mechanism also moves in the left-right direction in accordance with this, so that a large installation space has to be secured. There are issues to be solved here.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been devised with the object of providing a power transmission structure of a planting portion in a walking type transplanter which can eliminate these disadvantages. And a transmission and a planting section are disposed before and after the body frame, and the planting section power output from the transmission is transmitted by a planting drive mechanism of a planting claw and a lateral feed driving mechanism of a seedling mounting table. In a walk-type transplanter that is distributed to a power distribution shaft that performs the power distribution, a planting clutch is provided, and the power distribution shaft and the traverse drive mechanism are installed in a transmission case,
In addition, between the transmission case and the planting section, there is a planting power transmission mechanism that relays the power transmission from the power distribution shaft to the planting drive mechanism, and a power transmission from the lateral feed drive mechanism to the seedling mounting table. A transverse feed power transmission mechanism to be relayed is interposed, and the transverse feed power transmission mechanism is arranged along the body frame, and is supported to be rotatable around the axis. A base end is fixed to a front end of the traverse transmission shaft, a first swinging rod whose tip is engaged with a slide block of the traverse drive mechanism, and a base end is fixed to a rear end of the traverse transmission shaft. And a second swinging rod, the tip of which is engaged with the seedling mounting table side.

In the present invention, the structure of the planting portion is simplified by this configuration, so that the maintainability, the balance between the front and rear of the machine body can be improved, and the arrangement space can be made compact.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is a walking type rice transplanter,
The rice transplanter 1 has an engine 2 mounted in the front, and a front-low-back-high seedling mounting table 3 is provided in the rear so as to be movable left and right.
Then, the unit seedlings are scraped from the seedling mounting table 3 and planted on the rice field by the planting operation of the planting claws 4 synchronized with the running of the machine. The basic configuration is the same as the conventional one.

[0006] Reference numeral 5 denotes a transmission case integrally assembled with the engine 2. The transmission case 5 is formed by mating cases 5a, 5b and a cover 5c covering side surfaces of the case 5b. First to fifth transmission shafts 6 facing left and right,
7, 8, 9, and 10, the engine power input by the first shaft 6 is output to the traveling system from a sprocket 8a provided at the projecting end of the third shaft 8, and the projecting force of the fourth shaft 9 Power is transmitted from the engine 2 to the first shaft 6 through a sprocket 9a provided at the end, and power is transmitted from the engine 2 to the pump shaft 11a of the hydraulic pump 11. This is performed by the gear 12.

Reference numeral 13 denotes a shifter shaft. The tip end of the shifter shaft 13 is fitted into the transmission case 5 so as to be movable left and right.
The shifter fork 14 is engaged with a cylindrical transmission gear 15 that is spline-fitted to the first shaft 6 and a back gear 16 that is rotatably fitted to the fifth shaft 10. The gears 15 and 16 are simultaneously operated for shifting. In a shift operation state corresponding to the reverse position of the shift lever 17, the engine power input by the first shaft 6 is used to transmit the engine power to the cylindrical transmission gear 15 and the back gear that constantly meshes with the first gear 15 a of the cylindrical transmission gear 15. 16, an input gear 7 a of the second shaft 7 meshed with the small diameter gear 16 a of the back gear 16, and an input gear 8 b of the third shaft 8 constantly meshed with the output gear 7 b of the second shaft 7. 8, and in a shift operation state corresponding to the neutral position of the shift lever 17, the small-diameter gear 16 a of the back gear 16 is disengaged from the input gear 7 a of the second shaft 7 to perform power transmission. It is severing. Further, the shift lever 1
7, a shift operation state corresponding to the work traveling position 7 is the cylindrical transmission gear 15, the input gear 7a of the second shaft 7 meshed with the second gear 15b of the cylindrical transmission gear 15, and the output of the second shaft 7. The engine power is transmitted to the third shaft 8 via the input gear 8b of the third shaft 8 which always meshes with the gear 7b, and further, in the shift operation state corresponding to the road traveling position of the shift lever 17, the cylindrical shift is performed. The engine power is transmitted to the third shaft 8 via a gear 15, a back gear 16 constantly meshing with the first gear 15 a of the cylindrical transmission gear 15, and an input gear 8 b of the third shaft 8 meshed with the back gear 16. I do. That is, "first shaft 6 →
In the reverse speed change state via the transmission path of the fifth shaft 10 → second shaft 7 → third shaft 8, “first shaft 6 → second shaft 7 → third shaft 8” or “first shaft 6 → fifth shaft The third shaft 8 is rotated in the reverse direction in order to pass through a speed change path one step higher than in the forward speed change state through the transmission path of “the shaft 10 → the third shaft 8”,
Further, in a road traveling speed change state via a transmission path of “first shaft 6 → fifth shaft 10 → third shaft 8”, the back gear 16 is connected to the first gear 15a of the cylindrical transmission gear 15 and the input gear of the third shaft 8. 8b, the power is transmitted to the third shaft 8 at the same time, so that the third shaft 8 is rotated at a higher speed than in the state of the work traveling speed change via the second shaft 7, which is the reduction shaft.

On the other hand, 9b and 9c respectively correspond to the fourth shaft 9
The first and second inter-gear gears 9b and 9c have different numbers of teeth. However, when the shift lever 17 is operated in the work operation range, the cylindrical gear is changed. The power transmission to the fourth shaft 9 is relayed by selectively meshing the first gear 15 a and the second gear 15 b of the gear 15. That is, the first inter-gear gear 9
b has a greater number of teeth than the second inter-gear gear 9c, and the number of teeth of the first gear 15a of the cylindrical transmission gear 15 is set to be greater than the number of teeth of the second gear 15b. In the shift operation state corresponding to the position, the transmission of power to the fourth shaft 9 is cut off without engaging the cylindrical transmission gear 15 with the inter-gear gears 9b and 9c. The 15th first gear 15a meshes with the second inter-gear gear 9c to rotate the fourth shaft 9 at a high speed. In the second position, the first gear 15a of the cylindrical transmission gear 15 is moved to the first inter-gear gear 9b. The fourth shaft 9 is rotated at a low speed by engaging with the second gear 15b of the cylindrical transmission gear 15, and the fourth shaft 9 is meshed with the second inter-gear gear 9c at the third position. The gears are rotated at And it is capable of performing on the basis of the shift to the linear speed change operation of the single shift lever 17.

Meanwhile, one end of the fifth shaft (power distribution shaft) 10 protruding from one side surface of the transmission case 5 is interlocked with the sprocket 9a of the fourth shaft 9 via a chain 18 in the cover 5c. The sprocket 10a is provided to be freely rotatable.
The input power is transmitted to the fifth shaft 10 via the planting clutch mechanism 19, and the power of the chain 20 is transmitted from the sprocket 10 b provided at the other end of the fifth shaft 10 to the operation mechanism of the planting claw 4. It is transmitted through the. That is, the planting system power output from the fourth shaft 9 is “sprocket 9a → chain 18 → sprocket 1”.
0a → the planting clutch mechanism 19 → the fifth shaft 10 → the sprocket 10b → the chain 20 ”, which is transmitted to the operating mechanism of the planting claw 4 by a power transmission mechanism. By changing to a sprocket, the shift range of the inter-stock shift can be changed. 21 is a sprocket 9
This is a tension bar that constantly urges the chain 18 whose tension changes due to the exchange of a in the tension direction.

A screw shaft 22 is provided at the rear end of the transmission case 5. One end of the screw shaft 22 is connected to the transmission case 5.
The sprocket 22a provided at one end of the fifth shaft 10 is integrally formed with the sprocket 10c and the chain 23 at one end of the fifth shaft 10 in parallel with the sprocket 10a. It is interlocked and linked through. In other words, the screw shaft 22 is driven by power distributed from one end of the fifth shaft 10,
By replacing the sprocket 22a with a sprocket having a different number of teeth, the lateral feed amount of the seedling mounting table 3, which will be described later, can be changed. Reference numeral 24 denotes a tension bar which constantly urges the chain 23, whose tension is changed by replacement of the sprocket 22a, in a tensioning direction.

Reference numeral 25 denotes a slide block which is fitted to the screw shaft 22 so as to be slidable in the left-right direction. The slide block 25 is driven by a vertical feed drive shaft 26 arranged in parallel with the screw shaft 22 to rotate around the axis. While the rotation is restricted, the guide piece 25a to be housed reciprocates right and left with the rotation of the screw shaft 22 by fitting into the screw groove 22b formed on the outer peripheral surface of the screw shaft 22. The seedling mounting table 3 is moved laterally by the movement. That is, the body frame 1
a, a transverse feed shaft 27 extending from the transmission case 5 to the lower part of the seedling mounting table 3 is supported rotatably around the axis, and a base end is integrally provided at the front end of the transverse feed shaft 27. A second rocker, in which a pin 25c protruding forward from a hanging portion 25b of the slide block 25 is engaged with a long end hole 28a of the first rocker rod 28, while a base end is integrally provided at a rear end. The slide block 25 and the seedling mounting table 3 are linked to each other by engaging a pin 3 a protruding from the rear surface of the seedling mounting table 3 with the long end hole 29 a of the rod 29. Further, reference numeral 30 denotes a bearing provided on the slide block 25. The bearing 30 is attached to a pin 25d protruding rearward from a hanging portion 25b of the slide block 25. Rolling contact from above. That is, bearing 3
0 regulates the rotation of the slide block 25 which is about to rotate with the rotation of the screw shaft 22 by abutting the outer peripheral surface of the vertical feed drive shaft 26 in a direction similar to the rotation direction of the screw shaft 22. In addition, the reciprocating movement of the slide block 25 right and left due to the rotation control is guided by rolling on the outer peripheral surface of the vertical feed drive shaft 26.

On the other hand, the other end of the screw shaft 22 is provided with a ratchet 31 having a pair of pawls 31a, and the vertical feed drive shaft 26 is also provided with a drive arm 32 opposed thereto. And the above-mentioned ratchet 31 is screw shaft 2
The vertical feed drive shaft 26 is intermittently rotated by pushing the drive arm 32 in accordance with the rotation of the drive arm 2. The intermittent rotation causes the vertical feed mechanism provided on the rear surface of the seedling mounting table 3. 33 is driven. That is, the vertical feed mechanism 33 includes a pair of upper and lower rollers 34,
The belt 35 is suspended between the lower roller 34 and a feed lever 36 connected to the lower roller 34 via a ratchet mechanism (not shown) for restricting reverse feed. The seedling contact surface of the belt 35 is moved downward by a predetermined amount, so that the planted seedlings placed on the seedling mounting table 3 are vertically fed downward. An operating arm 3 provided below the feed lever 36 to perform a push-up operation of the feed lever 36
7 is a connecting arm 3 provided at the other end of the vertical feed drive shaft 26 protruding from the other side of the transmission case 5.
8 is connected via a connecting rod 39.

In the embodiment of the present invention constructed as described above, the power of the planting portion transmitted to the fourth shaft 9 is transmitted to the fifth shaft 10 having the planting clutch 19 installed in the transmission case 5. After that, while being transmitted from one end to the screw shaft 22 provided inside the transmission case 5, the other end is transmitted via the chain 20 to the planting claw 4.
Is transmitted to the operating mechanism. That is, the transmission case 5 includes the fifth shaft 10 serving as the power distribution shaft and the traverse drive mechanism including the screw shaft 22 and the like. Therefore, the structure of the planting portion can be greatly simplified as compared with the conventional one in which the power distribution shaft and the traverse drive mechanism are arranged in the planting portion, and as a result,
The maintainability at the planting section can be improved.

Further, since the power distribution shaft and the traverse feed drive mechanism are provided in the transmission case 5 to reduce the weight of the planting portion, the front-rear balance of the body can be improved to improve running stability and planting accuracy. . In addition, the transmission of the traverse feed power to the seedling mounting table 3 is performed when the slide block 25 moves left and right on the side of the traverse drive mechanism. The rotation is converted into a rotation in the circumferential direction, and the second swinging rod 29 swings based on this. As a result, it is possible to transmit the traversing power from the traversing drive mechanism incorporated in the front transmission case 5 to the rear seedling mounting table 3 using the rotation of the transmission shaft 27 around the axis. Become,
It is not necessary to secure a large space for disposing the transmission shaft 27 disposed along the body frame 1a as in the case where the transmission is carried out by swinging the transmission shaft 27 in the left-right direction, which contributes to downsizing and simplification of the structure. .

Further, since the power transmission from the fifth shaft 10 to the screw shaft 22 is performed on one side of the transmission case 5 in which the inter-stock conversion sprocket 9a is disposed, the inter-stock conversion sprocket 9a is provided. And the sprocket 22a for converting the traverse feed amount can be arranged at a nearby position, thereby simplifying the sprocket replacement work.
The number of parts can be reduced by covering the cover.

Further, in the embodiment, the back gear 16 constituting the traveling transmission mechanism is configured to be freely rotatably supported by the fifth shaft 10 which is a power distribution shaft. It is convenient to reduce and simplify the structure.

[0017]

[Effects] In summary, since the present invention is configured as described above, the power of the planting part output from the transmission arranged at the front of the fuselage is transmitted to the planting drive mechanism of the planting claw and the seedling. It is distributed to the traversing drive mechanism of the mounting table, and the power transmission shaft and the traversing drive mechanism are installed in the front transmission case, and the rear planting drive mechanism and the seedling mounting table are each connected via the power transmission mechanism. As a result, the concentration of components on the planting portion is eased, the structure of the planting portion is simplified, maintenance is improved, and the planting portion is lightened to improve the longitudinal balance of the machine. In addition, when the slide block moves to the left and right on the side of the traverse drive mechanism, the movement of the traverse power to the seedling mounting table is performed by rotating the transmission shaft around the transmission shaft via the first swinging rod. And the second swinging rod swings based on this. As a result, it is possible to transmit the traverse power of the traverse drive mechanism arranged in the front transmission case to the rear seedling mounting table by using rotation around the axis of the transmission shaft, Unlike the transmission in which the transmission shaft is swung in the left-right direction to transmit power, there is no need to secure a large space for disposing the transmission shaft disposed along the body frame, which can contribute to downsizing and simplification of the structure.

[Brief description of the drawings]

FIG. 1 is a side view of a rice transplanter with a partial cross section.

FIG. 2 is a plan view of the rice transplanter.

FIG. 3 is a side view of a transmission case.

FIG. 4 is an exploded perspective view of a transmission case.

FIG. 5 is a longitudinal sectional view of a transmission front part with a part developed.

FIG. 6 is a longitudinal sectional view of a rear part of the transmission, in which a part is developed.

FIG. 7 is an exploded perspective view showing a main part of a horizontal feed mechanism and a vertical feed mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 traveling body 1a body frame 3 seedling mounting table 4 planting claw 5 transmission case 22 screw shaft 25 slide block 27 transmission shaft 28 first swinging rod 29 second swinging rod

Claims (1)

(57) [Scope of request for utility model registration] A transmission and a planting part are disposed before and after a body frame, and a planting power output from the transmission is transmitted to a planting drive mechanism for a planting claw and a lateral feed driving mechanism for a seedling mounting table. In the walking type transplanter, the power distribution shaft for distributing the power is provided with a planting clutch, and the power distribution shaft and the traverse drive mechanism are provided in a transmission case. A power transmission mechanism for planting that relays power transmission from the power distribution shaft to the planting drive mechanism, and a power for lateral feed that relays power transmission from the lateral drive mechanism to the seedling mounting table. A transmission mechanism interposed therebetween, and the traverse power transmission mechanism is disposed along the body frame, and is supported by the traverse transmission shaft so as to be rotatable around an axis; Based on front end A first swinging rod whose end is fixed and whose tip is engaged with the slide block of the traversing drive mechanism, a base end is fixed to the rear end of the traversing drive shaft, and the tip is engaged with the seedling mounting table side. A power transmission structure for planting portion power in a walking type transplanter, comprising a second swinging rod to be combined.