JP3553139B2 - Hitch mounting structure for riding rice transplanter - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a hitch mounting structure for a riding rice transplanter corresponding to an arrangement position of an implantation mission case that differs depending on the setting of the number of implantation streaks.
[0002]
[Prior art]
Conventionally, riding rice transplanters made by mounting the mounting link rear end and extending to the rear of the vehicle body to the hitch which is arranged in front of the planting unit has become known, in this known technique, hitch, planting It was attached to the front of the planting mission case of the planting part via a hitch table that protrudes the left and right swing shafts of the mounting part.
Accordingly, since the hitch is disposed at the left and right central portions of the traveling vehicle body (since it is mounted at the rear end of the mounting link at the rear of the traveling vehicle body), the planting transmission case is also disposed at the left and right central portions of the traveling vehicle body.
On the other hand, the right and left central portions of the seedling mounting table are also disposed so as to coincide with the left and right central portions of the traveling vehicle body, because of the relationship of the center of the swing caused by the lateral feed or the like.
[0003]
[Problems to be solved by the invention]
In such a configuration, when changing the number of planting lines set by the planting section, the seedling mounting table is replaced, and the arrangement position and the number of transmission cases for driving the planting claws are changed. The seedling mount connects the connecting arm to the sliding child receiver on the horizontal feed shaft projecting from the planting mission case, and furthermore, the vertical feed cam of the vertical feed shaft also projecting from the planting mission case. A driven cam for driving the vertical feed belt transport is provided so as to abut against the belt, and is mounted.
However, as described above, the left and right central portions of the seedling mounting table need to be aligned with the left and right central portions of the traveling vehicle body.On the other hand, when disposing the planting mission case in the left and right central portions of the traveling vehicle body, The relative position in the left-right direction of the horizontal feed shaft and the vertical feed shaft with respect to the seedling mounts having different numbers of planting lines is displaced.
Therefore, for example, in the case of the five-row planting and the six-row planting stand, it is necessary to shift the mounting position of the connecting arm and the driven cam in the left-right direction by 150 mm. Even if the attachment position of the driven cam is set (for example, as shown in FIG. 5, even if the driven cam 23 is disposed between the adjacent vertical feed belts 21 (at the lower end of the rib 19)), six rows are planted. For the seedling mounting table, these mounting positions are shifted halfway to the left and right (for example, the driven cam 23 must be disposed around the winding portion of the vertical feed belt 21 of the vertical feed transport shaft 22). ), Mounting becomes difficult, and the configuration of the seedling mounting table itself must be greatly changed depending on the number of setting rows, which is complicated in manufacturing and leads to an increase in cost.
[0004]
Therefore, regardless of the set number of seedlings, the connection positions of the connecting arm and the driven cam on the seedling mounting table can be unified, and the planting mission case can be set to, for example, 5 in accordance with the set number of seeding rows of the seedling mounting table. When changing the row planting to the six row planting, the number of the seedling mats to be placed on the seedling mounting table is increased by one, and therefore, the seedling mats may be shifted to the left and right by about half (about 150 mm) the width of one seedling mat. However, the hitch to be mounted on the left and right central portions of the traveling vehicle body was conventionally mounted on the front portion of the planting transmission case, so that such a configuration could not be achieved.
[0005]
[Means for Solving the Problems]
The present invention is configured as follows in order to solve the above problems.
According to the present invention, an elevating link constituted by a top link 14 and a lower link 15 is provided at a rear portion of a traveling body of the riding rice transplanter, and a hitch 1 is attached to a rear end of the elevating link, and the hitch 1 is a rocking bearing. The hitch table 2 is supported so as to be able to swing left and right through a rocking shaft, and a transmission case M is fixedly mounted on the hitch table 2. In the configuration in which power is transmitted to the input shaft 17 protruding in front of the planting mission case M, the hitch base 2 is provided with bolt holes forming a mounting portion for fixing the planting transmission case M to the left and right. The pitch between the bolt holes forming the right and left mounting portions is the width of the one seedling mat mounting portion 18a of the seedling mounting table 18 which is reciprocated left and right by the planting transmission case M. About half of One in which the.
[0006]
In the second aspect of the present invention, in the hitch mounting structure for a rice transplanter according to the first aspect, when the planting transmission case M is mounted in one of the bolt holes on the left and right mounting portions of the hitch table 2, the other side is provided. The mounting stays 10 and 11 are fixed to the bolt holes of the mounting portion .
[0007]
[Action]
As described above, since the attachment portions to the planting mission case are provided on the left and right sides of the hitch table, the planting mission case attached to the left (right) attachment portion is attached to the right (left) attachment portion. With respect to the planting mission case, it has moved by the shift width of the planting mission case due to the change in the number of planting stands set on the planting stand, and the left and right relative positions of the connecting arm of the planting stand and the driven cam It is possible to attach seedling stands with different numbers of setting rows while keeping the same.
[0008]
Furthermore, when only the mounting part on one side of the hitch table is attached to the planting mission case, the load applied to the planting mission case from the hitch table increases. Since the stay is supported by the stay, the force applied to the hitch table is dispersed, and the force is not concentrated only on the planting mission case.
[0009]
【Example】
The problems and configurations to be solved by the present invention are as described above. Next, embodiments of the present invention shown in the accompanying drawings will be described.
FIG. 1 is an overall side view of a riding rice transplanter, FIG. 2 is a front view showing a mounting structure of a hitch 1 and a hitch base 2 with respect to a planting mission case M with five-row planting, FIG. 3 is a left side view, and FIG. FIG. 5 is a front view showing the positional relationship with the seedling mounting table 18, and FIG. 6 is a front view showing the mounting structure of the hitch 1 and the hitch table 2 to the planting mission case M set to 6-row planting. 8 is also a right side view, FIG. 8 is a right side view, FIG. 9 is a front view showing a positional relationship with the seedling mounting table 18, FIG. 10 is an internal side view showing a drive system of the planting section transmission case M, and FIG. FIG.
[0010]
First, the overall configuration of the riding rice transplanter will be described.
As shown in FIG. 1, a lifting link, which is a three-point link of a top link 14 and a lower link 15, which is driven up and down by hydraulic pressure or the like, is provided at a rear portion of the traveling vehicle body S, and the top link 14 and the lower link 15 are provided. Hitch 1 is attached to the rear end. The hitch 1 is connected to the planting mission case M via the hitch table 2 in the planting part U, and is located forward of the planting mission case M via the universal joint 16 from a PTO shaft projecting from the traveling vehicle body S. It is transmitted to the projecting input shaft 17 to drive the seedling table 18 laterally, to drive the vertical feed belt 21 below the seedling table 18, and to rotate the rotary case 26 provided with the planting claws 27. .
[0011]
Here, the drive system of the planting section U will be described with reference to FIGS. In the planting transmission case M, the input shaft 17 transmits to the transmission shaft 28 by meshing with a bevel gear, and further transmits the planting claw output shaft 29 by chain transmission from the transmission shaft 28, and the planting claw output shaft 29. Is transmitted to the planting claw chain case 25 via the planting claw transmission pipe 24 shown in FIG. 2 or FIG. 6 to rotationally drive the rotary case 26 having the planting claw 27 as described above.
[0012]
On the other hand, the power is transmitted from the transmission shaft 28 to the traverse transmission shaft 30 by gear engagement, and the traverse transmission gears 30a and 31a are meshed with the traverse transmission shaft 30 to be transmitted to the traverse shaft 31 so as to be capable of shifting. The meshing portion of the lateral feed transmission gears 30a and 31a is disposed in a speed change housing portion Ma protruding from the left side of the planted transmission case M.
The horizontal feed shaft 31 and the vertical feed shaft 33 that is chain-transmitted to the horizontal feed shaft 31 are horizontally protruded to the right of the planted transmission case M. A screw is cut around the outer periphery of the transverse feed shaft 31, and a slide receiver 32 for inserting a slide into the screw is provided around the transverse feed shaft 31. It reciprocates on the shaft 31. The connecting arm 20 of the seedling mounting table 18 is connected to the sliding child receiver 32, and the seedling mounting table 18 is reciprocated right and left.
A vertical feed cam 34 protrudes from the vertical feed shaft 33, and when the horizontal feed end position of the seedling mounting table 18 is reached, the vertical feed shaft 33 transports the vertical feed belt 21 on the seedling mounting table 18. The driven cam 23 provided on the shaft 22 abuts, the driven cam 23 and the transport shaft are rotated by a fixed amount, the vertical feed belt 21 is driven to be transferred by a fixed amount, and the seedling mat on the seedling mounting table 18 is removed. It is transported downward.
[0013]
The configuration of the hitch 1 and the hitch base 2 in the planting section U of the above-described riding rice transplanter will be described with reference to FIGS. A screw hole 1a for attaching a left-right horizontal control cylinder 35 of a planting portion to be described later is formed on the left and right sides of the upper end of the hitch 1, and a top link mounting shaft 1b is provided horizontally just below the screw hole 1a. Have been. A swing bearing 1c is held at the center of the lower portion of the hitch 1, and a lower link rotating shaft 1d having a rear end rotatably attached to the lower link 15 at the lower end thereof. It is laid horizontally in the direction.
[0014]
At the rear of the hitch 1, a hitch base 2, which is a substantially L-shaped plate in a side view, is provided. A swing shaft 3 protrudes forward from the hitch base 2. It is rotatably supported in the swing bearing 1c. Therefore, the hitch table 2 can swing right and left with respect to the hitch 1.
However, on the upper and lower sides of the swing shaft 3, swing restraining pins 4a and 4b are provided so as to protrude forward of the hitch table 2, and a curved elongated hole 1f is provided at the lower end of the rear surface of the hitch 1 with a swing shaft. An upper swing restricting plate 1e having a curved elongated hole is protruded rearward at a position slightly higher than 3 and a swing restricting pin 4a is inserted into the elongated hole of the upper swing restricting plate 1e. The swing control pin 4b is fitted into the hole 1f, and the left and right swing amount of the hitch table 2 is controlled within a range in which the swing control pins 4a and 4b can slide in both long holes.
In addition, the lower part of the center frame 7 serving as a downward rotation stopper of the seedling mounting table 18 is branched into a front part 7a and a rear part 7b, and the lower end of the front part 7a is attached to the regulating plate 2a. I have.
[0015]
Next, a configuration for attaching the hitch table 2 to the planting mission case M will be described.
Screw holes are respectively formed on the left and right of the upper horizontal portion of the hitch table 2 and the left and right lower ends of the vertical portion of the hitch table 2 having an L shape in a side view as described above, and bolts 5L and 5R and 6L and 6R, respectively. Can be screwed. The pitch between the left and right bolts 5L and 5R and between the left and right bolts 6L and 6R is 150 mm, which is about half the width of the seedling mat mounting portion 18a of the seedling mounting table 18 described later. On the other hand, in the planting transmission case M, a bolt hole 8 for screwing the hitch table 2 is provided at an upper end portion, and a bolt hole 9 is provided at a front end portion.
[0016]
First, in the case of five-row planting, the hitch 1 and the hitch base 2 are mounted on the right side (left side in front view) of the planting mission case M as shown in FIGS. That is, the bolts 5L and 6L of the hitch table 2 are screwed into the bolt holes 8 and the bolt holes 9 of the planted transmission case M, respectively, and the left shoulder of the hitch table 2 is brought into contact with the front surface of the planted transmission case M. Let it. Further, in this state, the swing shaft 3 of the hitch 1 and the hitch base 2 is eccentric with respect to the planted transmission case M, and a swing load is applied to the planted transmission case M. Then, the mounting stay 10 is erected from the planting claw transmission pipe 24 on the side opposite to the planting transmission case M, and the bolt 6R is screwed to the front surface of the mounting stay 10 and the bolt 5R is screwed to the upper end. In this way, since the swing shaft 3 is supported by the planting transmission case M and the mounting stay 10 from both the left and right sides, the swing load is dispersed.
The lower end of the rear portion 7b of the center frame 7 is screwed to the rear end of the upper end of the planting transmission case M as shown in FIG.
[0017]
Next, in the case of the six-row planting setting, the hitch 1 and the hitch base 2 are attached to the left side (right side in front view) of the planting mission case M as shown in FIGS. That is, the bolts 5R and 6R of the hitch base 2 are screwed into the bolt holes 8 and 9 of the planted transmission case M, respectively, while the left side surface of the transmission housing Ma in the planted transmission case M is shown in FIG. The fixing stay 11 is fixed with the bolts 12, 12 and 12, and the left portion of the hitch table 2 is brought into contact with the mounting stay 11, and the bolts 5L and 6L are screwed onto the upper surface and the front surface of the mounting stay 11, respectively. Stop. Also in this case, the hitch table 2 on which the swinging shaft 3 protrudes is supported by the planting mission case M and the mounting stay 11 from both right and left sides, so that the swing load on the planting mission case M is reduced. Have been.
In this case, since the center frame 7 is separated to the left from the planting mission case M, the lower end of the rear portion 7b of the center frame 7 is screwed to the lower end of the rear portion 7b when the five-row planting is set. A spacer 13 is extended from a bolt hole of the planting transmission case M, and a lower end of the rear portion 7b is screwed to a left end of the spacer 13.
[0018]
Next, the left-right positional relationship between the seedling mounting table 18, the hitch 1 and the hitch table 2, and the planting mission case M is shown in FIGS. 5 and 9 between the 5-row planting setting and the 6-row planting setting. A comparison will be described.
As shown in FIGS. 5 and 9, seedling mat mounting portions 18a, 18a,... Separated by ribs 19, 19,. In the case of (1), an odd number of seedling mat mounting portions 18a are formed, so that the center line X in the horizontal lateral feed passing through the center of the swing shaft 3 is placed at the center of the seedling mat mounting portion on the seedling mounting table 18 as shown in FIG. It is located at the middle line of the placing part 18a. In this state, the position of the planting mission case M is at the position shown by the broken line in FIG. 5, and the connecting arm 20 and the driven cam 23 of the seedling mounting table 18 It is arranged along the rib 19a on the right side of the placing portion 18a. This is because the connecting arm 20 has its lower end fixed to the rib 19a to maintain the strength, and the driven cam 23 can be disposed between the adjacent vertical feed belts 21 wound around the belt transport shaft 22, This is because it can be disposed at a position that does not interfere with the feed belt 21.
[0019]
Next, in the case of the setting of six-row planting, since the number of the seedling mat mounting portions 18a is an even number, the middle line X ′ in the left-right lateral feed passing through the center of the swing shaft 3 is located at the center as shown in FIG. The rib 19b is polymerized. Here, the hitch 1 and the hitch stand 2 are arranged closer to the left by 150 mm, which is about half the width of the one seedling mat mounting portion 18a, compared to the five-row planting setting with respect to the planting mission case M. However, when viewed from the center rib 19b including the middle line X 'of the right and left lateral feed of the seedling mounting table 18 to the right rib 19a', the hitch 1 and the hitch table 2 are shifted to the left by 150 mm, and The relative position with respect to the attached transmission case M is the same as that at the time of the five-row planting setting shown in FIG. That is, the relative position of the right rib 19a 'with respect to the horizontal feed shaft 31 and the vertical feed shaft 33 extending to the right of the planting transmission case M does not change, as in the case of five-row planting. The connecting arm 20 and the driven cam 23 can be arranged along the rib 19a ', and the connecting arm 20 and the driven cam on the seedling mounting table 18 can be used regardless of the number of the five or six-row planting. Since the mounting method of the 23 is unified, the standard can be standardized in the production, and the production can be simplified and the cost can be reduced.
[0020]
Finally, a horizontal control mechanism for the right and left of the planting section U will be described with reference to FIGS.
Since the traveling vehicle body S travels with the wheels grounded on the plow at the bottom of the field, the traveling vehicle S may be tilted left and right due to unevenness of the plow. Therefore, with respect to the hitch 1 attached integrally with the traveling vehicle body S, the planting portion U can freely swing left and right by the swing shaft 3 protruding from the hitch table 2, so that the horizontal movement of the traveling vehicle body S can be achieved. Although it does not follow, when the left and right swing is severe, it is necessary to forcibly swing the planting section U left and right to return to the horizontal position. A mechanism is provided.
[0021]
Above the hitch 1, left and right horizontal control cylinders 35 projecting cylinder rods 36 are provided on both left and right sides, and the ends of both cylinder rods 36 are horizontal bars fixed to the seedling mounting table 18. 37. In order to slide the cylinder rod 36 left and right, a hydraulic valve V for supplying pressure oil to the left and right horizontal control cylinder 35 is provided on the left and right horizontal control cylinder 35. The disposition shape of the hydraulic valve V is parallel to the seedling mounting table 18, so that a large space can be secured between the hydraulic valve V and the seedling mounting table 18, and the pressure oil supply path to the cylinder is also linear. Easy to plumb.
[0022]
With the above-described configuration, first, the hitch 1 integrated with the traveling vehicle body S is largely tilted left and right, and is tilted beyond the swing range of the swing shaft 3, so that the hitch table 2 (such as the seedling mounting table 18, etc.) When the entire planting section U is also inclined, the horizontal sensor SS disposed in a part of the planting section U senses the inclination, and based on the detection of the sensor, the hydraulic valve V controls the left and right horizontal control cylinders 35. Is controlled, and the cylinder rod 36 is slid to the side opposite to the side where the planting portion U is inclined downward (for example, when the right side of the planting portion U is inclined downward, the left side of the cylinder rod 36 is inclined). The protruding portion extends and the right protruding portion contracts.), And the seedling mounting table 18 is turned to the sliding side of the cylinder rod 36 via the horizontal bar 37 to return to the horizontal position. That is, the entire planted portion U is returned horizontally by returning the seedling table 18 to the horizontal position.
Conventionally, the left and right horizontal control mechanism of the planting section is generally a mechanism in which a horizontal axis is rotated by an electric motor and a seedling table is rotated left and right through a sliding child screwed on the horizontal axis. However, in the present embodiment, the operation force is increased due to the cylinder rod sliding based on the hydraulic control, and the left-right inclination can be corrected immediately and quickly.
[0023]
【The invention's effect】
The present invention is configured as described above, and has the following effects. That is, as described in claim 1, the mounting portions to the planting mission case are provided on the left and right sides of the hitch table at intervals of the shift width of the planting mission case in accordance with the setting of the number of planting strips. The planting mission case attached to the attachment part on the side is different from the planting mission case attached to the attachment part on the right (left) side in that the planting mission case accompanying the change in the number of plants set on the seedling mounting table In other words, it is possible to mount the seedling mounting tables having different setting numbers while keeping the left and right relative positions of the connection arm and the driven cam of the seedling mounting table unified. Therefore, the production standard for the seedling mounting table is unified, which makes production easier and reduces costs.
[0024]
Furthermore, according to the configuration as described in claim 2, when only one mounting portion of the hitch table is attached to the planting mission case, the load applied from the hitch table to the planting mission case increases. Since the anti-planting mission case mounting side is supported by the mounting stay, the force applied to the hitch table is dispersed, the power is not concentrated only on the planting mission case, and the planting mission case is not damaged. . Therefore, as described above, the hitch can be attached to the left and right sides of the planting mission case.
[Brief description of the drawings]
FIG. 1 is an overall side view of a riding rice transplanter.
FIG. 2 is a front view showing an attachment structure of a hitch 1 and a hitch base 2 to a planting mission case M in a five-row planting setting.
FIG. 3 is a left side view of the same.
FIG. 4 is a right side view of the same.
FIG. 5 is a front view showing the positional relationship with the seedling mounting table 18;
FIG. 6 is a front view showing a mounting structure of the hitch one and the hitch base 2 with respect to the planting mission case M in a six-row planting setting.
FIG. 7 is a left side view of the same.
FIG. 8 is a right side view of the same.
FIG. 9 is a front view showing the positional relationship with the seedling mounting table 18;
FIG. 10 is an internal side view showing a drive system of the planting section transmission case M.
FIG. 11 is an internal front view of the same.
[Explanation of symbols]
M Transmission case with planting 1 Hitch 2 Hitch base 3 Oscillating shaft 5L ・ 5R Bolt 6L ・ 6R Bolt 7 Center frame 8.9 Bolt hole 10 Mounting stay 11 Mounting stay 12 Bolt 13 Spacer

Claims (2)

An elevating link constituted by a top link 14 and a lower link 15 is provided at the rear of the traveling vehicle body of the riding rice transplanter, and a hitch 1 is attached to a rear end of the elevating link. The hitch 1 is connected to a swing bearing and a swing shaft. To support the hitch table 2 so that it can swing left and right,
A transmission case M is fixedly mounted on the hitch table 2, and power is applied to an input shaft 17 protruding forward of the transmission case M via a universal joint 16 from a PTO shaft protruding from the traveling vehicle body S. In the transmission configuration,
The hitch table 2 is formed with two sets of bolt holes at left and right positions that form mounting portions for fixing the planting transmission case M. The pitch between the bolt holes that form the left and right mounting portions is A hitch mounting structure for a riding rice transplanter, wherein the width of the seedling mat mounting portion 18a of the seedling mounting table 18 reciprocated right and left by the transmission case M is approximately half . 2. A hitch mounting structure for a rice transplanter according to claim 1, wherein when the planting transmission case M is mounted on one of the left and right mounting portions of the hitch table 2, the other mounting hole on the other side is provided. A hitch mounting structure for a riding rice transplanter , wherein mounting stays 10 and 11 are fixed to bolt holes .

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