JPH08822Y2 - Seedling planting machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seedling planting machine for planting seedlings of rice, vegetables and the like.

[Problems to be Solved by Conventional Techniques and Inventions] Generally, this seedling planting machine is adapted to scrape planting seedlings placed on a seedling mounting table as unit planting seedlings and plant them in a field. , In this case, the cam shaft is provided at the end of the rotating case so as to be prevented from rotating, while the transmission shaft in the rotating case is provided with the planting claw portion on the output shaft that rotates at a phase different from that of the rotating case. And, there is one in which a cam body for operating the seedling releasing mechanism is provided on the cam shaft at the timing of the planting operation of the planting claw portion in the field scene. It is necessary to assemble it in the rotating case so that it will not be rotated in order to protect it from damage.

Therefore, in the conventional one, the cam body has a cam body attached to one end, so the other end is aligned from the inside of the case so as to correspond to the chamfer, and is inserted and fitted to prevent the rotation of the camshaft. I was attached. However, the camshaft cannot prevent the displacement in the axial direction (especially the displacement toward the cam body side) only by this chamfering fitting, and therefore, the rotating case is divided into half and the camshaft is C- It is conceivable that a shift preventing member such as a ring is assembled in a state in which it is prevented from coming off, and the other half of the case is butted against the one half of the case.

However, in this case, it is necessary to butt the case halves together while aligning the camshaft on the case half with the case halves. Since it is blindly covered, it must be said that it is almost a difficult technique to align the cam shaft, and therefore the other end of the cam shaft is displaced outside the case protruding from the other half of the case. I fixed it while measuring the stopper and the detent,
In this case, since the other end of the cam shaft projects from the other half of the case, there is a problem in that it is inevitably large in size and that it is necessary to sacrifice the adhesion of mud and straw debris.

[Means for Solving the Problem] The present invention has been devised in view of the above circumstances to provide a seedling planting machine capable of eliminating these drawbacks. The cam shaft is attached to the end away from the axis of rotation so as to prevent it from rotating, while an output shaft that rotates in a different phase with respect to the rotation case due to the transmission mechanism in the rotation case is installed on the outer circumference of the cam shaft. In addition, in one end of the cam shaft, in a seedling planting machine, which is provided with a cam body for operating the seedling detachment mechanism at the timing of planting the planting claw portion attached to the output shaft in the field scene, When assembling the other end of the cam shaft into the rotation case in a rotation-stop manner, the rotation case is made into a half shape that is assembled by butting against each other, and one half of the case is rotated around the axis. Freely movable shaft A supported cylindrical output shaft, a C-ring for preventing the output shaft from coming off from a case half, a cam shaft penetrating the output shaft, and a coming-out prevention of the penetrating cam shaft from the output shaft. In order to do so, a C-ring attached to the other end of the cam shaft protruding from the output shaft is incorporated, while a holder for the cam shaft that is attached to the other half of the case to prevent rotation is attached to the other half of the case. When the other half of the case is assembled by associating the other half of the case with each other, it is possible to visually check whether the other end of the cam shaft is aligned with the holder. A peep hole is provided, and a cap is detachably attached to the peep window. According to the present invention, the camshaft can be easily assembled in the state where the camshaft is prevented from rotating and the camshaft is prevented from shifting in the axial direction.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a planting work unit attached to a rear portion of a riding type traveling body so as to be vertically movable up and down, and the planting work unit 1 includes a seedling stand 2 and a float 3, which reciprocate left and right, and a work unit frame. Although it is configured by members such as 4, a planting claw portion 5 described later is arranged at the rear portion of the working portion frame 4. In other words, at the rear end of the working unit frame 4,
A gear case (corresponding to the rotating case of the present invention) 6 is rotatably provided. An input shaft 8 for inputting the power of the working unit by a chain 7 is integrally fixed to the outer plate of the gear case 6 via a key 8b. The input shaft 8
The clutch claw shaft 8a spline-fitted to the input shaft 8 and the sprocket shaft 7a of the chain 7 rotatably mounted on the input shaft 8 are formed with an interrupted clutch 9b for fixing a line.
Power transmission to the side can be intermittent.

On the other hand, 9 is a sun gear that is rotatably supported by the input shaft 8 and is integrated with the working unit frame 4 side while being prevented from rotating via the engaging claws 9a. The pair of intermediate gears 10 are meshed with each other in such a relationship that they are out of phase with each other by 180 degrees. Further, a final gear 11 is meshed with each intermediate gear 10. The above-described planting claw portion 5 is provided on the cylindrical output shaft 12 into which the final gear 11 is spline-fitted integrally, so that the posture of the planting claw portion 5 is controlled via a gear transmission mechanism. Is configured. Further, the sun gear 9, intermediate gear 10, and final gear 11 are all formed of eccentric gears (of course, they may be elliptical gears or non-circular gears). Then, the rotation of the gear case 6 which is interlocked with the rotation of the input shaft 8 to perform the planting operation causes the intermediate gear 10 to revolve around the sun gear 9 fixed to the frame 4 side, and further the intermediate gear 10 to rotate. By the operation of 10, the final gear 11 revolves in the opposite direction while revolving in the opposite direction, whereby the output shaft 12 rotates, and the rotation of the output shaft 12 and the rotation operation of the gear case 6 are performed. Therefore, the planting claw portion 5 has the posture with respect to the gear case 6 that the seedling placing table 2
It works by drawing a constant planting trajectory while changing so that it always faces to the side. Reference numerals 23 and 25 are bearings for rotatably bearing the output shafts to the respective half portions 6b and 6c of the gear case 6.

A first cam 13 constituting a cam mechanism is rotatably provided on the intermediate gear shaft 10a that supports the intermediate gear 10, and the first cam 13 is interposed between the first gear 13 and the gear case 6. It is pressed against the second cam 15 by the urging force of the ammunition machine 14. The second cam 15 is integrally fixed to the output shaft 12 and is set to rotate integrally with the final gear 11.
In the above-described planting operation, the planting claw portion 5
In the planting locus, the cam projection 15a of the second cam 15 crosses the cam projection 13a of the first cam 13 in the ascending process from the bottom dead center to the top dead center, at which time the first cam 13 is attached by the ammunition 14. By swinging against the power, control is given to the movement of the planting claw 5 in the direction of the top dead center, and when the planting claw 5 is slightly above the top dead center and the cam is crossed, Second cam 15
On the contrary, the urging force of the ammunition machine 14 is applied to press from the back side, whereby the planting claw portion 5 becomes a state in which the tip of the claw is directed to the outer side of the planting locus, and The part is configured to scrape off the planted seedlings on the seedling receiving body 16 provided at the lower end of the feeding of the seedling placing table 2.

On the other hand, 17 is a cam shaft which is rotatable on the output shaft 12 and is fixed to the gear case 6, 17a is a cam body provided at one end of the cam shaft 17, and 18 is a planter peak provided on the planter arm 5a. , 19 is planter fork, 20 is planter fork
An ammunition that always urges 19 toward the retracting side, 21 is a planter arm
An operating arm is pivotally supported by 5a via a support shaft 21a and a tip portion 21b is engaged with an upper end portion of the planter fork 19. Reference numeral 21c is a cam arm formed on the operating arm 21 so as to abut on the cam body 17a. Then, the planter fork 19 is urged by the ammunition 20,
By the cam operation of the cam body 17a, the detachment and pushing-out operation of the planted seedlings held in the planter beak 19 is performed.

Here, the cam shaft 17 is assembled as follows. That is, the chamfer 17b is formed at the other end of the cam shaft 17, while the gear case 6 has a case half 6c and another half half.
It has a half structure with 6b. And the case half 6c
Includes an output shaft 12 which is rotatably supported via a bearing 25, a C-ring 26 which is fixed to the outer periphery of the output shaft 12 to prevent the output shaft 12 from being disengaged from the case half portion 6c, and a spline on the output shaft 12. A second cam 15 to be fitted, a final gear 11, and a bearing 23 are incorporated, and further, a cam shaft 17 is fitted and incorporated in the inner periphery of the output shaft 12. Then, a C-ring 24 is fitted into the other end of the cam shaft 17 protruding from the output shaft 12 to prevent the output shaft 12 from coming off.

On the other hand, the other half 6b of the case has a peep hole 6a through which the other end of the cam shaft 17 can be seen from the outside. Further, 22 is a holder, and the boulder 22 is formed with an anti-rotation hole 22b chamfered corresponding to the chamfer 17b on the inner circumference,
Then, with the holder 22 fitted through the peephole 6a,
It is configured so as to be attached to the gear case 6 in a non-rotating manner by means of 22a. Furthermore, a cap is provided in the peep hole 6a.
27 is detachably fitted from the outside.

In the embodiment of the present invention configured as described above, when the gear case 6 makes one rotation due to the rotation of the input shaft 8 in time with the traveling of the machine body, each planting claw portion 5 moves along the planting trajectory. Then, a so-called high-speed planting can be performed in which the pine-shaped seedlings placed on the seedling placing table 2 are scraped by a predetermined amount and planted on the rice field.

In this case, the cam shaft 17 assembled so as not to rotate in the gear case 6 is also restricted from moving in the axial direction. In other words, in this product, the camshaft 17 is chamfered to the gear case 6 by the chamfering fit in the holder 22 which is key-assembled so that the rotation around the axis is restricted. However, the cam shaft 17 is further prevented from coming off in the axial direction by a C-ring 24. This C-ring
To describe the procedure for assembling the cam shaft 17 using 24, first, the output shaft 12 is rotatably supported by the case half portion 6c via the bearing 25, and the output shaft 12 from the case half portion 6c is rotated. Fix the C-ring 26 on the outer circumference to prevent it from coming off. Then output shaft 12
The second cam 15 and the final gear 11 are spline fitted to each other, and the bearing 23 is further incorporated. After that, the Kim shaft 17 is fitted and incorporated in the inner circumference of the output shaft 12. Then, the C-link 24 is fitted into the other end of the cam shaft 17 protruding from the output shaft 12 to
To prevent

On the other hand, the holder 22 is attached to the other half 6b of the case with the cap 27 removed using the key 22a while the cap 27 is removed.
Then, in this state, the case halves 6b and 6c will be assembled so that they butt, but at this time, the camshaft 17 and the holder
While confirming the alignment with 22 through the peep hole 6a, check the adjustment and make a fitting assembly, and then the cap.
The 27 is fitted into the peep hole 6a, and the assembly is completed.

As described above, in the embodiment of the present invention, the cam shaft 17 is assembled to the gear case 6 so as to restrict the rotation around the shaft center. , By chamfering with a holder 22 keyed to the gear case 6. Therefore, the load generated by the rotation stop of the cam shaft 17 is applied to the gear case 6 by the holder 22.
It is received at the position of the key 22a which is away from the shaft center with the intervening shaft, and a large detent load (torque) acts on the gear case 6 as in the case where the cam shaft 17 is directly detented by the gear case 6. As a result, even if the gear case 6 is formed of a light alloy using a metal such as aluminum, the occurrence of backlash is suppressed.

Moreover, even when the C-ring 24, which prevents the cam shaft 17 from shifting in the axial direction when the cam shaft 17 is assembled, is a wheel stopper assembled to the cam shaft 17, both case halves 6b, 6c are butted and assembled. At this time, the alignment fitting of the cam shaft 17 to the holder 22 can be performed while confirming it from the outside through the peep hole 6a, and accordingly, the other end of the cam shaft 17 fits in the case half 6b. In particular, it is compact and has no attachment of straw waste, etc., but the assembling property can be improved and the supporting structure can be simplified.

[Effects] In summary, since the present invention is configured as described above, the output shaft and the cam shaft of the rotating case are respectively C-shaped.
-One half of the case assembled in a state where it is retained by using a ring and the other half of the case in which the holder in which the cam shaft is aligned and fitted are assembled are assembled, but in this case In addition, it is possible to check whether the cam shaft on the case half is aligned with the case half from the outside through the peep hole opened on the case half. The other end of the camshaft can be housed in the rotating case to make it compact and avoid the attachment of straw chips, etc., while improving the assembling ability and simplifying the supporting structure.

Moreover, the rotation stop support for the rotating case of the cam shaft,
Since the operation is performed with the holder interposed, the load due to the detent that acts on the rotating case is reduced, and as a result,
Even if the rotating case is made of a material such as a light alloy, it is possible to avoid backlash and maintain the initial performance.

[Brief description of drawings]

The drawings show an embodiment of a seedling planting machine according to the present invention, in which FIG. 1 is a side view of a part of a planting part with a part cut away, and FIG. 2 is a horizontal sectional view of a gear case part, FIG. 3 is an enlarged cross-sectional view of the cam shaft mounting portion. In the figure, 5 is a planting claw portion, 6 is a gear case, 6a is a fitting hole,
6b is the other half of the case, 6c is the other half of the case, 12 is the output shaft, 17
Is a cam shaft, 17a is a cam body, 22 is a holder, 24 is a C-ring, 26 is a C-ring, and 27 is a cap.

Claims (1)

[Scope of utility model registration request] 1. A camshaft (17) is attached to an end of the rotating case (6) away from the center of the rotating shaft so as to prevent the camshaft (17) from rotating.
An output shaft (12), which rotates in a different phase with respect to the rotating case by a transmission mechanism in the rotating case, is attached to the outer periphery of the cam shaft, and one end of the cam shaft has a planting claw attached to the output shaft. In a seedling planting machine comprising a cam body (17a) for operating the seedling detachment mechanism at the same timing as the planting in the field, the other end of the camshaft is locked inside the rotating case. In the case of assembling, the rotating case (6) is made into a half-shape that is assembled by butting against each other, and a half of the case (6c) has a cylindrical shape that is rotatably supported around the axis. Output shaft (12) and a C-ring (26) for preventing the output shaft from coming off from the case half part
A cam shaft (17) penetrating the output shaft, and a C-ring (24) attached to the other end of the cam shaft protruding from the output shaft to prevent the penetrating cam shaft from coming off the output shaft. On the other hand, the other half of the case (6b) is provided with a holder (22) for the cam shaft which is attached to the other half of the case to prevent rotation, and the other half of the case is When assembling by assembling these case half comrades assembled,
There is a peep hole (6a) that allows you to visually confirm whether the other end of the cam shaft is aligned with the holder.
A seedling planting machine characterized in that a cap (27) is detachably provided on the viewing window.