JPH07322726A - Rolling controller of working part in traveling vehicle for working - Google Patents

Abstract

PURPOSE:To improve workability and working efficiency in controlling by simplifying control of engaging depth of forced rolling control mechanism. CONSTITUTION:In forcibly carrying out rolling control of an intermediate frame 12 installed between a holder frame and a planting working part by power of the motor 17 transmitted through an intermediate gear 19 and rack 20, a motor 17 and an intermediate gear 19 are previously assembled to a base 18 and engaging depth control between a pinion gear 17a and an intermediate gear 19 is automatically carried out at dimensions control stage of the assembling position and engage depth control between the intermediate gear 19 and the rack 20 is carried out based on the position control of the base 18 capable of controlling vertical position to a holder frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling control device for a working section of a work vehicle such as a riding type rice transplanter.

[0002]

BACKGROUND OF THE INVENTION Generally,
In this type of work vehicle, the working unit is connected to the traveling machine body in a rolling manner, and
There is a system in which a forcible rolling control mechanism that performs a forcible rolling control based on motor drive is connected. However, in the case where the intermediate gear that meshes with the output gear of the motor is meshed with the fixed gear provided on the controlled member side to perform the forced rolling control, between the output gear and the intermediate gear and the intermediate gear It is necessary to adjust the meshing depth with the fixed gear. Therefore, it is proposed that the intermediate gear be independently position-adjustable so that the meshing depth can be adjusted at the both meshing positions. However, in this structure, both meshing are performed based on the position movement of only the intermediate gear. Since it is necessary to adjust the meshing depth of the positions at the same time, the adjustment work becomes complicated and the workability and work efficiency at the time of adjustment are inferior.

[0003]

SUMMARY OF THE INVENTION The present invention was devised with the object of providing a rolling control device for a working section in a working vehicle capable of eliminating these drawbacks in view of the above-mentioned circumstances. The output of the motor in a working vehicle including a working unit that is rollably connected to the traveling machine body and a forced rolling control mechanism that performs forced rolling control based on motor drive. When the intermediate gear that meshes with the gear is meshed with the fixed gear provided on the controlled member side to perform the forced rolling control, the motor and the intermediate gear are assembled in advance on the same base member, and the mounting position of the base member is set. It is characterized in that it is configured to be adjustable in a direction in which the meshing depth between the intermediate gear and the fixed gear changes. With this configuration, the present invention simplifies the meshing depth adjustment of the forced rolling control mechanism and improves workability and work efficiency during the adjustment.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a riding type rice transplanter, and a rear part of the traveling machine body 1 is connected to a planting work section 3 via an elevating link mechanism 2 for hydraulically moving up and down. The planting work unit 3 is detachably connected to the rear end of the elevating link mechanism 2 and has a holder frame 4 integrally provided with a boss 4a facing the front and rear at the lower end, and the holder frame 4. A rolling support shaft 5 that is rotatably supported by a boss 4a of the rolling support shaft 5 through a bearing, and is integrally connected to the rear end of the rolling support shaft 5 and has seedling table support stays 6a on both left and right sides. Working part frame 6 provided, planter case 7 integrally assembled to working part frame 6, planter arm 8 arranged in parallel with planter case 7, upper end part of seedling table supporting stay 6a and planter case 7
The bottom of the planter case 7 and the planter case 7 in a forward tilted position, which is supported by the upper end portion of the plant so as to be able to reciprocate left and right through the slide piece S and is forcibly fed laterally in accordance with the scraping timing of the planter arm 8. The float 10 and the like are provided at predetermined intervals in the left-right direction. That is, the planting work unit 3 is supported rotatably on the holder frame 4 connected to the traveling machine body 1 via the elevating link mechanism 2 via the rolling support shaft 5, but the basic configuration described above is Both are conventional.

The elevator link mechanism 2 includes a single upper link 2a, a pair of left and right lower links 2b, and each link 2
The so-called three-point link mechanism is provided with a link holder (not shown) that connects the rear ends of a and 2b.
Then, in the state where the link holder is integrally connected to the holder frame 4, it swings up and down based on the expansion and contraction of the lift cylinder (not shown) connected to the upper link 2a or the lower link 2b, so that the planting work unit. 3 is moved up and down.

Reference numeral 12 denotes an intermediate frame provided between the holder frame 4 and the planting work portion 3, and a boss portion integrally formed at the lower end of the intermediate frame 12 in the front-rear direction. 12 a is rotatably fitted and supported on the boss portion 4 a of the holder frame 4. That is, the intermediate frame 4
Is capable of rolling relative to the holder frame 4 and the planting work part 3, and the rolling fulcrum thereof coincides with the rolling fulcrum of the planting work part 3. Further, the intermediate frame 4 is composed of a frame body 12b in an upright posture, and a T-shaped frame portion 12c protruding forward from the upper end of the frame body 12b along the back side surface of the seedling stand 9. However, the intermediate frame 12 in a side view is arranged so as to be located between the seedling placing table support stay 6 a and the seedling placing table 9.

Reference numeral 13 is a rolling ammunition composed of a pair of left and right coil ammunition, and the rolling ammunition 13 is provided between the T-shaped frame portion 12c of the intermediate frame 12 and the left and right end portions of the seedling placing table 9. It is installed in a V shape. That is, the left and right rolling ammunition 13 expands and contracts reciprocally along with the lateral feeding of the seedling mounting table 9 to balance the unbalanced load of the seedling mounting table 9, and the lateral loading of the seedling mounting table 9 is performed based on this balance action. The rolling of the planting work unit 3 is restricted.

Reference numeral 14 denotes a balance bullet which is composed of a pair of left and right coil bullets. The balance bullet 14 is formed in a V shape between the frame body 12b of the intermediate frame 12 and the working unit frame 6. The urging force, which is interposed, is set so as to balance the entire load of the planting work unit 3. That is, a so-called driven rolling control in which the planting work unit 3 is held by the rolling bullet 13 and the balance bullet 14 to allow a follower field-following action of the planting work unit 3 based on the buoyancy of the float 10. However, since the rolling ammunition 13 that balances the unbalanced load due to the lateral feeding of the seedling mounting table 9 and the balance ammunition 14 that balances the entire load of the planting work unit 3 are separately provided,
It is possible to simplify the setting of the urging force of each ammunition 13, 14 and to set the optimum urging force corresponding to the load to be balanced.

By the way, the balance ammunition 14 is provided between an ammunition bracket 15 projecting laterally from an intermediate portion of the intermediate frame 12 and an ammunition bracket 16 projecting forward from both left and right sides of the working unit frame 6. The arranging direction is set such that the boss portion 12a of the intermediate frame 12 is orthogonal to the boss portion 12a in a side view, so that the biasing force of the balance ammunition 14 causes a moment to act on the intermediate frame 12. Can be avoided.

Reference numeral 17 denotes a motor with a speed reduction mechanism which is provided at a lateral position of the holder frame 4 via a base 18, and the pinion gear 1 for outputting the driving force of the motor 17 is provided.
The large-diameter gear portion 19a of the intermediate gear 19 meshes with the 7a, and the small-diameter gear portion 19b that rotates integrally with the large-diameter gear portion 19a is provided on the rack 20 that projects laterally from the intermediate frame 12. It meshes from above. That is, between the holder frame 4 and the intermediate frame 12, a forced rolling control mechanism for forcibly rolling the intermediate frame 12 in the left-right direction based on the drive of the motor 17 is formed. Is a front seedling table support stay 6a,
It is set in a space that is surrounded by the rear seedling stand 9 and the lower planter case 7 and has a substantially triangular shape in a side view. Therefore, the forced rolling control mechanism can be effectively protected from water, mud, obstacles, and the like. It is like this.

The base 18 is formed with a screw hole 18a for fixing the motor 17 with a screw, a shaft through hole 18b for penetrating the motor shaft, and the like. A gear assembling hole 18c for rotatably assembling 19 is machined. That is, since the motor 17 and the intermediate gear 19 are assembled to the base 18 in advance, the meshing depth adjustment (backlash adjustment) between the pinion gear 17a and the intermediate gear 19 is automatically performed at the dimension management stage during the hole machining. It is supposed to be done.

Further, a mounting piece 18e having a pair of upper and lower mounting holes 18d is bent and formed on one side edge of the base 18. Then, the base 18 is integrally attached to the side surface portion of the holder frame 4 by tightening the bolt 21 and the nut 21a which are inserted into the attachment hole 18e and the attachment hole 4b on the holder frame 4 side. The hole 18d is formed as a long hole that is long in the vertical direction. Therefore, when the bolt 21 is loosened, the base 18 can be slid vertically to adjust the meshing depth of the intermediate gear 19 and the rack 20. It is like this.

Reference numeral 22 denotes a cover body assembled to the base 18. The cover body 22 covers a front, rear, outer side and lower side of the base 18, and an upper opening of the cover body 22a. And an upper cover 22b which is detachably provided. And the cover body 2
The reference numeral 2 covers the forced rolling control mechanism composed of the motor 17, the intermediate gear 19 and the rack 20 to protect these parts from water, mud, obstacles and the like. The upper opening can be opened and closed based on the attachment / detachment of the upper cover 22b.

By the way, the rack 20 is formed in an arc shape centering on the rolling fulcrum of the intermediate frame 12, and meshing teeth 20a are formed on the outer peripheral side thereof to secure a meshing range with the intermediate gear 20. However, at both ends of the meshing range, the cut-up portion 20b is formed with no meshing teeth.
Are formed respectively. Therefore, when the meshing position of the intermediate gear 19 reaches the rounded-up portion 20b, the meshing with the intermediate gear 19 is rejected and the further forced rolling operation of the intermediate frame 12 is mechanically restricted. .

Reference numeral 23 denotes a pendulum type rolling detection sensor provided on the rear surface of the intermediate frame 12 via a sensor bracket 23a.
The rolling detection value of 3 is input to a control unit (not shown). Then, in the control section, the motor 17 is driven in the forward and reverse directions so that the input rolling detection value matches a predetermined set value (horizontal set value or tilt set value), and the intermediate frame 1 is controlled based on this motor control.
2 is subjected to forced rolling control (horizontal control or tilt control) in a fixed posture.

Reference numeral 24 is a stopper pin projecting rearward from the intermediate frame 12, and the stopper pin 24
Is loosely fitted into the recess 25 a of the stopper plate 25 that is provided integrally with the planter case 7 to form a rolling regulation mechanism of the planting work unit 3. That is, the stopper pin 24 allows the rolling of the planting work unit 3 if the rolling angle of the planting work unit 3 with respect to the intermediate frame 12 is within a predetermined angle, but the planting work unit 3 with respect to the intermediate frame 12 is allowed. When the relative rolling angle of (1) reaches a predetermined angle, the rolling contact of the recessed portion 25a is abutted on the left and right ends of the recessed portion 25a to restrict further rolling of the planting work portion 3.

26 is a T-shaped frame 1 of the intermediate frame 12.
In the hanging bracket protruding downward from 2c, the lower end portion of the hanging bracket 26 is slidably contacted with the front surface of a guide plate 27 provided at the upper end portion of the holder frame 4. That is, a tilting restraint mechanism that restrains the tilting of the intermediate frame 12 that receives the urging force of the rolling bullet 13 toward the rear on the basis of the contact of the hanging bracket 26 with the guide plate 27 is configured.

Further, a pair of left and right tubular members 26a are provided so as to project from the guide plate contact surface of the hanging bracket 26. A part of each tubular member 26a is exposed from the tip of the tubular member 26a and is guided. Ball 2 that abuts plate 27 so that it can roll freely
8 are accommodated. That is, the sliding resistance between the hanging bracket 26 and the guide plate 27 due to the rolling of the intermediate frame 12 is minimized.

A pair of left and right bent pieces 27a are formed at the left and right ends of the guide plate 27 so as to face each other with the lower end of the hanging bracket 26 interposed therebetween.
7a are provided with limit switches 29 that detect and operate based on contact with left and right contact pieces 26b formed on the hanging bracket 26. That is, the left and right limit switches 29 detect that the rolling angle of the intermediate frame 12 relative to the holder frame 4 has reached a predetermined angle, and output the detection signal to the control section to output the motor 17 to the controller. The limit is automatically stopped.

Reference numeral 30 designates a pair of left and right stopper brackets provided at predetermined positions (left and right lower link 2b intervals) at the left and right positions of the working section frame 6, the stopper brackets 30 projecting forward, and their projecting tips. Has
A stopper bolt 31 that faces the lower surface of the left and right lower links 2b is screwed so as to be able to move back and forth in the vertical direction. That is, when the lifting link mechanism 2 is hydraulically operated to raise the planting work unit 3, the left and right lower links 2b come into contact with the left and right stopper bolts 31, respectively, at the substantially upper limit position. The working unit 3 is forcibly returned to the parallel posture, and the rolling with respect to the traveling machine body 1 is locked.

Reference numeral 32 denotes a pair of left and right regulating plates provided on the left and right lower links 2b so as to be swingable back and forth. The regulating plates 32 are scraping amount adjusting levers 50 arranged around the lifting link mechanism 2. In order to avoid interference with the paste fertilizer supply pipe 51 or the like, the protrusion pin 33 protrudes from the lower link 2b to an empty space below, but the regulation pin 33 protrudes from the side surface of the stopper bracket 30 in the elongated hole 32a formed in the regulation plate 32. Are loosely engaged. Further, since the regulation pin 33 is located in the middle portion of the long hole 32a when the planting work section 3 has a normal planting height,
Even if the provisional planting work unit 3 rolls to the maximum within the allowable range of the stopper pin 24, it does not contact the lower end of the elongated hole 32a, but the planting exceeds a predetermined height H1 lower than the normal planting height. When the working unit 3 descends, the lower link 2
b together with the change of the relative angle between the planting work unit 3b
3 approaches the lower end of the slot 32a, and in this state,
Since the permissible dimension L (rolling permissible range) of the regulation pin 33 with respect to the long hole 32a is smaller than the permissible range of the stopper pin 24, the abutment of the regulation pin 33 with the regulation plate 32 causes the planting work unit 3 to move. The rolling tolerance is regulated. Furthermore, since the movement allowable dimension L becomes smaller as the planting work unit 3 descends,
The rolling regulation amount increases as the height H1 is lowered from the predetermined height H1, and only a slight rolling of the planting work unit 3 is allowed at the stage when the predetermined height H2 below the wheel ground contact surface height H0 is reached. It is like this. That is, the planting work unit 3 approaches the rear wheel 1a of the traveling machine body 1 as it descends due to the link characteristic of the lifting link mechanism 2, and therefore, in the state of descending beyond the predetermined height H1, the rear part of the rear wheel 1a is located. There is a risk that the float 10 located at will interfere with the rear wheel 1a as the planting work section 3 rolls, but the float 10 and the rear wheel 1a will be separated based on the rolling restriction by the restriction pin 33 and the restriction plate 32. It is designed to avoid interference. In addition, L1 is the allowable movement dimension in the height H1 state, and L2 (<L1) is the allowable movement dimension in the height H2 state.

In the embodiment of the present invention configured as described above, the intermediate frame 12 provided between the holder frame 4 and the planting work section 3 includes the intermediate gear 19 and the rack 2.
Although the rolling control is forcibly performed by the power of the motor 17 transmitted via 0, since the motor 17 and the intermediate gear 19 are assembled in the base 18 in advance,
The engagement depth between the pinion gear 17a and the intermediate gear 19 is automatically adjusted at the stage of dimensional control of the attachment position (machining position of the attachment hole). Moreover, the base 18 moves up and down with respect to the holder frame 4. Since the position is adjustable, the meshing depth of the intermediate gear 19 and the rack 20 is adjusted based on the vertical position adjustment of the base 18. That is, it is possible to simplify the adjustment work by reducing the number of positions where the meshing depth needs to be adjusted. Moreover, the meshing depth between the intermediate gear 19 and the rack 20 can be adjusted by adjusting the meshing depth between the intermediate gear 19 and the pinion gear 17a. Since it can be performed without considering the mesh depth, the workability of meshing depth adjustment can be improved compared to the conventional method in which meshing depth adjustment at two locations had to be performed simultaneously. It can also contribute to improvement.

[0023]

In summary, since the present invention is constructed as described above, forcible rolling control is performed by engaging the intermediate gear that meshes with the output gear of the motor with the fixed gear provided on the controlled member side. However, the motor and the intermediate gear are assembled in advance on the same base member, and the mounting position of the base member is adjustable in the direction in which the meshing depth between the intermediate gear and the fixed gear is changed. The engagement depth between the side gear and the intermediate gear is automatically adjusted at the dimension management stage of the assembling position in the base member, and the engagement depth between the intermediate gear and the fixed gear is adjusted in the base member. It will be performed based on the mounting position adjustment. Therefore, it is possible to reduce the number of necessary points for adjusting the meshing depth, or it is possible to eliminate the complexity of simultaneously adjusting the meshing depths at two locations. As a result, the meshing depth adjustment in the forced rolling control mechanism can be performed. Workability and work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a riding-type rice transplanter.

FIG. 2 is a side view of a main part of a planting work unit.

FIG. 3 is a front view of a main part of the same.

FIG. 4 is an enlarged plan view of an essential part of the same.

FIG. 5 is a perspective view of a forced rolling control mechanism.

FIG. 6 is a front view showing the operation of the rolling regulation mechanism.

FIG. 7 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Elevating link mechanism 3 Planting working part 4 Holder frame 5 Rolling support shaft 6 Working part frame 6a Seedling table support stay 9 Seedling table 12 Intermediate frame 12a Boss 13 Rolling ammunition machine 14 Balance ammunition machine 17 Motor 18 Base 19 Intermediate gear 20 Rack 32 Restriction plate 33 Restriction pin

Claims (1)

[Claims] 1. A working traveling vehicle comprising: a working unit which is connected to a traveling machine body so as to be freely rollable; and a forced rolling control mechanism which performs a compulsory rolling control based on a motor drive. When the intermediate gear that meshes with the output gear meshes with the fixed gear that is provided on the controlled member side to perform forced rolling control, the motor and the intermediate gear are assembled in advance on the same base member, and the mounting position of the base member is also set. Is configured to be adjustable in a direction in which a meshing depth between an intermediate gear and a fixed gear changes, and a rolling control device for a working unit in a working vehicle.