JP3360877B2 - Planting part of riding rice transplanter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting section of a rice transplanter for riding. 2. Description of the Related Art Conventionally, as an embodiment of a rice transplanter, a planting section is connected to a rear of a traveling section via a lifting link mechanism so as to be able to move up and down and to be rollable around an axis in the front-rear direction. In some cases, the planting section can be controlled by a low link by rolling control means. [0003] The rolling control means includes an intermediate portion of a double-acting rolling cylinder extending laterally in the left-right direction via a cylinder mount at the upper end of a link-side hitch provided at the rear end of the lifting link mechanism. , And both ends of the rolling cylinder are connected to left and right sides of a seedling mounting table provided in the planting portion, so that the rolling cylinder can control the planting portion. At this time, the above-mentioned cylinder mounting base has its base mounted on the rear wall of the link-side hitch with mounting bolts, and the mounting bolts are mounted with their shafts oriented in the front-rear direction. [0005] However, a rolling cylinder for rolling control of a planted portion is provided with mounting bolts via a cylinder mounting base from the rolling cylinder in order to slide a piston rod in the lateral width direction. While the load in the left and right width direction acts on the mounting bolt, the above-mentioned load acts as a shearing force on the mounting bolt because the mounting bolt is mounted with the shaft center facing forward and backward. In addition, the mounting bolts are easily cut off, and the function of mounting the rolling cylinder by the cylinder mounting base cannot be sufficiently maintained for a long time. Further, there is also a problem that the mounting bolt is loosened and falls off due to a repeated load in the left-right width direction before the mounting bolt is cut. Therefore, according to the present invention, in accordance with the present invention, the planting section is connected to the rear of the running section via a lifting link mechanism so as to be able to move up and down and to be rollable around an axis in the front-rear direction. In a riding rice transplanter in which the planting portion can be controlled to be rolled by rolling control means, a rectangular tubular link side hitch portion extending vertically is provided at the rear end of the lifting link mechanism, and the left and right sides of the link side hitch portion are provided. At the upper end of the side wall, a base of a cylinder mounting base for mounting the rolling cylinder of the rolling control means is mounted, and the cylinder mounting base includes a pair of left and right side walls and a rear wall provided between the rear ends of the left and right side walls. And a support having a bolt screw hole formed at each lower portion of the left and right side walls. The support is fitted into the link side hitch portion from above, and the left and right sides of the link side hitch portion are provided. The outer surfaces of the left and right side walls of the support are brought into contact with the inner side surface of the wall to overlap in the left and right width directions, and the bolt screw holes are aligned with the bolt insertion holes formed in the left and right side walls of the link side hitch portion. And a mounting portion of a riding rice transplanter, wherein the mounting portion is mounted in both holes by mounting bolts whose axes are oriented in the left-right width direction. When the seedlings are planted, the seedlings are planted by the planting section while running the running section and pulling the planting section. The part is controlled by the rolling control means in a rolling control, that is, even when the traveling part is in an inclined posture due to the unevenness of the cultivator, the planting unit controls the posture so as to maintain the horizontal control with respect to the field scene, The planting depth is kept as one. The rolling control means includes an intermediate portion of a double-acting rolling cylinder extending in the left-right direction via a cylinder mount at the upper end of a link-side hitch provided at the rear end of the lifting link mechanism. The two ends of the rolling cylinder are connected to the left and right sides of the seedling table provided on the planting part.The cylinder mounting base overlaps the base on the left and right side walls of the link side hitch in the left and right width direction. It is mounted with mounting bolts with their axes oriented in the width direction. Therefore, even when a load in the left and right width direction is applied to the mounting bolt through the cylinder mount by the rolling cylinder in which the piston rod slides in the left and right width direction, the same load is applied to the mounting bolt. It only acts as a tensile force or a compressive force in the core direction, but does not act as a shearing force, and can prevent the mounting bolt from being cut or the like by the shearing force. Embodiments of the present invention will be described below with reference to the drawings. A shown in FIG. 1 is a riding rice transplanter. The riding rice transplanter A has a planting section 20 connected to a rear of a traveling section 1 capable of self-traveling by a lifting link mechanism 50 so as to be able to move up and down. As shown in FIG. 1, the traveling section 1 has an engine 3 mounted on a front portion of a vehicle body frame 2, a transmission case 4 disposed on a rear portion of the vehicle body frame 2, and a front portion of the transmission case 4. Left and right front wheels 6 and 6 for paddy field traveling are mounted via a front axle case 5, and right and left rear wheels 8 and 8 for paddy field traveling are mounted via a rear axle case 7 at a position rearward of the transmission case 4. . Spare seedling mounts 10 and 10 are mounted on both sides of the hood 9 covering the engine 2 and the like, and the transmission case 4 and the like are covered with a body cover 12 forming a step 11. Driver's seat 13
A steering handle 14 is provided at the front of the driver's seat 13 at the rear of the hood 9. Reference numeral 15 denotes a main shift lever, and 16 denotes a planting elevating and shifting lever. As shown in FIGS. 1 and 2, the planting section 20
The planting cases 22, 22 are arranged at a certain interval on the left and right sides of the planting mission case 21, respectively, and the transmission shaft case 23, 23 is connected between the planting mission case 21 and both planting cases 22, 22. Rotary cases 24, which rotate at a constant speed in one direction, are attached to the rear ends of the cases 21, 22, and 22, respectively, and a pair of plants are symmetrically positioned around the rotation axis of each rotary case 24. Claws 25, 25 are attached. 26 is a center float, 27 is a side float, 28 is a fertilizer, and 29 is a chemical sprayer. As shown in FIGS. 1 and 2, the input shaft 30 projects forward from the front wall of the planted transmission case 21, and the transmission case 4 provided on the input shaft 30 and the traveling unit 1. And a transmission shaft 31 is interposed between the transmission case 31 and the transmission power can be transmitted to the planted transmission case 21 via the transmission shaft 31. As shown in FIG. 1 and FIG. 2, on the transmission mission case 21 and the left and right side planting cases 22, 22,
The seedling mounting table 32 is placed with the front, rear, high and low slopes.
A guide rail 33 formed by extending in the left-right width direction is laid on the front upper end of the front side, and the center rail 34 is formed on the guide rail 33 by being raised above the planting transmission case 21.
The upper ends of the left and right side columns 35, 35 formed by being raised upward from the left and right side planting cases 22, 22 are slid in the left and right width directions via guide rollers (not shown), respectively. While being freely connected, the lower end of the seedling mounting table 32 is slidably supported in the left-right width direction on the lower rail 36 that is laid horizontally on the cases 21, 22, 22. As shown in FIGS. 2 to 4, a rolling connection frame 37 is provided between the upper portions of the three pillars 34, 35, and 35. Are connected to a rolling cylinder 72 of a rolling control means 80 to be described later and springs 90 and 91 for regulating rolling. At the front end of the planting mission case 21, as shown in FIGS. 1 and 3, a planting side hitch portion 40 is provided. A hitch table 41 is fixed to the front end, and a rolling support shaft 42 projects forward from a center portion of the hitch table 41, and at a position directly above and immediately below the rolling support shaft 42, respectively. The upper and lower rolling suppression pins 43 and 44 are configured to protrude forward. The lifting link mechanism 50 is, as shown in FIG.
The front end of the top link 52 and the front ends of the pair of left and right lower links 53 are connected to a mounting frame 51 erected at the rear end of the body frame 2 so as to be vertically rotatable. , 53, 53, the rear ends of which are rotatably connected to each other.
The lifting cylinder 55 provided at the rear of the device is interlockingly connected via a lifting operation link 56. As shown in FIGS. 3 and 4, the link hitch portion 54 is formed by forming the front hitch forming member 57 and the rear hitch forming member 58 into a rectangular tube extending in the vertical direction, respectively. A gate-type link connection bracket 59 is attached to the upper end of the front hitch forming body 57, and the rear end of the top link 52 is pivotally connected to the link connection bracket 59 by a pivot pin 60. Link connecting bodies 61, 61 are provided at the lower portions of the left and right side walls of the front hitch forming body 57, respectively, so as to protrude in the left-right width direction.
Are pivotally connected by pivot pins 62, 62 and connected. 57a is a top link insertion hole. As shown in FIGS. 3 and 4, the rear hitch forming body 58 has an upper end 58a extending to a position above the link connecting bracket 59, and a cylinder mount 63 is attached to the upper end 58a. On the other hand, a boss 64 is provided at the lower end, and the rear hitch forming body 58 located immediately above the boss 64 is mounted.
The upper pin receiving portion 65 is provided on the rear wall, and the lower pin receiving portion 66 is provided at the lower end of the rear hitch forming body 58 located immediately below the boss portion 64. Upper and lower rolling suppression pins 43 and 44 provided on the planting side hitch portion 40 are fitted respectively. In this way, by connecting the planting side hitch portion 40 to the link side hitch portion 54, the planting portion 20 can be freely rolled around the boss portion 64 and the upper and lower rolling suppressing pins can be used. By 43 and 44, the excessive response of the rolling operation of the planting section 20 is suppressed, and the posture of the planting section 20 can be stabilized. In such a configuration, the gist of the present invention resides in the mounting structure of the cylinder mounting base 63, which will be described below with reference to FIGS. That is, as shown in FIGS. 3 to 5, the cylinder mounting base 63 is mounted by fitting the lower half from above to the upper end 58a of the rear hitch forming body 58 formed in a rectangular cylindrical shape. It is formed of a support 70 and a cylinder mounting case 71 mounted on the front upper half of the support 70. The support 70 is formed of a pair of left and right side walls.
70a, 70a and a rear wall 70b provided between the rear ends of the left and right side walls 70a, 70a. Bolt screw holes 70c, 70c are formed in the lower portions of the left and right side walls 70b, 70b. The lower half of the support 70 is fitted into the upper end 58a of the rear hitch forming member 58 from above, and the support 70 is mounted on the inner side surfaces of the left and right side walls 58b, 58b of the rear hitch forming member 58. 7
The left and right side walls 70a, 70a are brought into contact with each other, and the respective side walls are overlapped in the left and right width direction, and the bolt screw holes 70c, 70b, formed in the lower part of the left and right side walls 70a, 70a of the support 70. 70c,
Align with the bolt insertion holes 58c, 58c formed on the upper portions of the left and right side walls 70a, 70a of the rear hitch forming body 58, and insert the mounting bolts 76 with the shafts oriented in the left and right width directions into both holes 58c, 70c. By screwing, the support 70 can be attached to the rear hitch forming body 58. 76b is a washer. The cylinder mounting case 71 is formed in a cylindrical shape with left and right sides opened, and a double-acting rolling cylinder 72 is inserted into the case 71, and the cylinder body of the rolling cylinder 72 is inserted into the case 71. The central part of 72a is pivotally supported by a cylinder support shaft 73 whose axis is oriented in the front-rear direction, and the piston rod 72b is extended from the cylinder body 72a toward the left and right width directions, as shown in FIG. Both ends of the piston rod 72b are connected to left and right sides of the rolling connection frame 37 via connection rods 74, 74, respectively. Reference numeral 75 denotes a valve case attached to the right end of the cylinder body 72a. In this way, by sliding the piston rod 72b of the rolling cylinder 72 in the left-right width direction, the planting portion 20 can be rolled around the boss portion 64. The rolling cylinder 72 on which the piston rod 72b slides in the width direction
Thereby, even when a load in the left and right width direction is applied to the mounting bolt 76 via the cylinder mounting base 63, the same load acts on the mounting bolt 76 only as a tensile force or a compressive force in the axial direction, It does not act as a shearing force. Accordingly, it is possible to prevent the mounting bolt 76 from being cut off or loosening over time, thereby preventing the mounting bolt 76 from falling off the cylinder mounting base 63. 72 mounting functions can be ensured for a long time. Further, since the cylinder mounting case 71 is formed in a cylindrical shape, the strength and rigidity against torsion and bending can be improved, and the thickness of the cylinder mounting case 71 can be reduced. As a result, weight can be reduced. Here, the rolling control means 80 includes the rolling cylinder 72, an angular velocity sensor 81 provided at the rear of the traveling section 1 for detecting a right and left inclination speed (speed or acceleration of the inclination operation), and a planting transmission case 20. A horizontal sensor 82 for detecting the angle of inclination of the planted portion provided on the input side, and a control unit 83 having the input side connected to the sensors 81 and 82 and a rolling cylinder 72 connected to the output side via a valve case 75. Is provided. In the rolling control unit 80, the control unit 83 automatically controls the rolling cylinder 72 by fuzzy inference based on the detection results of the angular velocity sensor 81 and the horizontal sensor 82, and corrects the lateral inclination of the planting unit 20. Thus, the planting section 20 can be held substantially horizontally with respect to the field scene. On the ceiling wall of the cylinder mounting case 71, as shown in FIG. 2 to FIG. The middle part of the spring connecting body 86 extending in the direction is attached to the left and right width direction so as to be freely adjustable, and the connecting bracket 33a attached to the left and right ends of the spring connecting body 86 and the left and right ends of the guide rail 33. , 33a, a pair of left and right neutral return springs
87,87 are interposed respectively. 88 is a mounting bolt, 89
Is a mounting position adjusting hole. As shown in FIGS. 2 to 4, a pair of left and right rolling regulating springs 90 and 91 are provided between the left and right sides of the rolling connection frame 37 and the spring support 85. A pair of left and right rolling regulating springs 90, 91 connect the respective inner ends 90a, 91a to the lower left and right sides of the spring support 85, while connecting the respective outer ends 91b, 91b above the connecting rods 74, 74. The protruding spring connecting brackets 92, 92 are connected via connecting rods 90c, 91c. In this manner, the pair of right and left rolling regulating springs 90 and 91 are arranged at a position higher than the rolling cylinder 72 to be as far as possible from the rolling support shaft 42 which is the rolling center position of the planting section 20. At the upper position, by using the moment to perform the rolling restriction function, the spring constants of the two rolling restriction springs 90 and 91 can be made as small as possible, and the size of the spring itself can be reduced. I have to. Further, in this embodiment, as shown in FIG. 2, since the rotation direction a of the input shaft 30 of the planting transmission case 20 is clockwise, the rolling power of the input shaft 30 can be offset. The right-hand rolling restriction spring 91
Is set to be larger than the spring constant of the rolling control spring 90 on the left side. Further, in this embodiment, as shown in FIG. 4, a cylinder support shaft 73 which supports the center of the rolling cylinder 72 is connected to a virtual vertical line C passing through the center of the rolling support shaft 42.
And the valve case 75 is attached to the right end of the cylinder body 72a of the rolling cylinder 72 to utilize the weight of the valve case 75. Then, the rolling power of the input shaft 30 is offset by cooperation with the right-hand rolling restriction spring 91. In this manner, even when the input shaft 30 is rotated in the direction a, the rolling force of the input shaft 30 is canceled out, and the planting section 20 can be held in a horizontal posture. The horizontal control of the planting section 20 by the control means 80 can be accurately performed, so that the planting operation performance of the planting section 20 can be improved. Since the valve case 75 is displaced to the right, the hydraulic piping to the valve case can be concentrated to the right. According to the present invention, the following effects can be obtained. That is, according to the present invention, a rectangular tubular link-side hitch portion extending in the vertical direction is provided at the rear end of the lifting link mechanism.
The base of the cylinder mount for mounting the rolling cylinder of the rolling control means is mounted, and the cylinder mount is formed of a pair of left and right side walls and a rear wall erected between the rear ends of the left and right side walls. A support having bolt screw holes formed at each lower portion thereof is fitted into the link-side hitch portion from above, and the left and right side walls of the support are attached to the inner surfaces of the left and right side walls of the link-side hitch portion. The outer side surfaces are brought into contact with each other to make the left and right width directions overlap, and the bolt screw holes are aligned with the bolt insertion holes formed on the left and right side walls of the link side hitch portion, so that the shaft center is formed in both the left and right width directions. It is attached with the mounting bolt facing. In this way, even when a load in the left-right width direction is applied to the link-side hitch portion by the rolling cylinder via the support of the cylinder mount, the support is fitted into the link-side hitch portion from above, and Since the outer surfaces of the left and right side walls of the support are brought into contact with the inner surfaces of the left and right side walls of the link side hitch portion to overlap in the left and right width direction, the load transmitted via the support is reduced by the link side hitch portion. Certainly accepted. Moreover, since the bolt screw holes formed in the support are matched with the bolt insertion holes formed in the left and right side walls of the link side hitch portion, the bolts are mounted in both holes by the mounting bolts whose shafts are oriented in the left and right width directions. The load only acts on the mounting bolt as a tensile force or a compressive force in the axial direction, but does not act as a shear force. Accordingly, it is possible to prevent the mounting bolt from being cut or loosened over time, thereby preventing the mounting bolt from dropping off the cylinder mounting base, thereby increasing the function of mounting the rolling cylinder by the cylinder mounting base. A favorable period can be secured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a riding rice transplanter having a planting section according to the present invention. FIG. 2 is a front view of the planting section. FIG. 3 is a side view of a main part. FIG. 4 is a front view of the main part. FIG. 5 is an explanatory view showing a mounting structure of a cylinder mounting base. [Description of Signs] A Riding rice transplanter 1 Running section 20 Planting section 30 Elevating link mechanism 63 Cylinder mount 72 Rolling cylinder 80 Rolling control means

Claims (1)

(1) The planting portion is connected to the rear of the traveling portion via a lifting link mechanism so as to be able to move up and down and to be rollable around an axis in the front-rear direction. A rice transplanter that can be controlled to be rolled by rolling control means , a rectangular tube extending vertically at the rear end of the lifting link mechanism.
It provided a link-side hitch portion of the upper end portions of the left and right side walls of the link-side hitch unit, mounting a cylinder mount base for mounting the rolling cylinder of the rolling control means
At the same time , the cylinder mounting base has a pair of left and right side walls and both left and right side walls.
And the rear wall erected between the rear ends.
Part comprising a support having formed a bolt screwing hole, the support is is fitted from above into the link-side hitch unit, the
The left and right sides of the support on the inner side of the left and right side walls of the link side hitch
When the outer surface of the wall is brought into contact and the left and right width directions overlap,
In both cases, bolt screw holes are formed on the left and right side walls of the link side hitch.
The planting section of a riding rice transplanter, wherein the mounting holes are aligned with the formed bolt insertion holes, and are mounted in both holes with mounting bolts having their shafts oriented in the lateral direction.