JPH07203724A - Rolling control unit for working section in working traveling vehicle - Google Patents

Abstract

PURPOSE:To provide the subject control unit designed to easily conduct the attaching/detaching operation for a rolling spring device and rolling locking operation without being affected by a forced rolling control mechanism. CONSTITUTION:This rolling control unit is so designed that a bracket 17 to assemble a motor 16, etc., making up a forced rolling control mechanism is slidable upward and, based on such a sliding motion, the engagement of an intermediate gear with a rack 19 is released to allow the intermediate frame 12 to make a free rolling.

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,
Among this type of working vehicle, there is one in which a working unit that is freely connected to rolling is driven and controlled by rolling through a pair of left and right rolling ammunition. In this type, a controllable rolling amount (rolling amount) is used. Since there is a limit to the effective range of the ammunition), there is a drawback that in a field with large irregularities, the working part is largely inclined following the rolling of the traveling machine body. Therefore, it has been proposed that the working unit be provided with a forced rolling control mechanism that performs forced rolling control based on actuator driving to compensate for the drawbacks of the driven rolling control. However, since the forced rolling control mechanism cannot be easily moved by hand when the actuator is not driven, the rolling operation is performed when the rolling ammo is attached or detached or when the forced rolling control mechanism fails. When performing a rocking operation, there is a disadvantage that the workability is lowered due to the influence of the forced rolling control mechanism.

[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. Therefore, the working section, in which the working posture is driven and controlled by the pair of left and right rolling ammunition, is provided with a forcible rolling control mechanism for forcibly rolling control based on the actuator drive. In a vehicle, the forced rolling control mechanism is configured by using a drive gear on the actuator side and a driven gear meshing with the drive gear, and one of these gears is moved to disengage the other gear. It is characterized in that it is provided with a movable mechanism. Further, according to the present invention, the workability at the time of attaching and detaching the rolling ammunition can be remarkably improved by this configuration.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawing, 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 with a planting work section (working section) 3 via a lifting 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 portion 4a facing the front and rear at the lower end, and a boss of the holder frame 4. A rolling support shaft 5, which is rotatably supported on the portion 4a via a pair of front and rear bearings 5a,
A working unit frame 6 integrally connected to the rear end of the rolling support shaft 5 and provided with seedling stand supporting stays 6a at both left and right ends thereof, and integrally fixed to the working unit frame 6. A planter case 7, a planter arm 8 arranged in parallel with the planter case 7, an upper end portion of the seedling stand supporting stay 6a and an upper end portion of the planter case 7 are supported via a slide piece S so as to be capable of reciprocating left and right, and The seedling stand 9 in a forward-tilting position, which is forcibly fed laterally in synchronization with the scraping timing of the planter arm 8, the center and the side floats 10 provided at the center of the bottom of the planter case 7 and on both left and right sides so as to be vertically swingable, It is composed of 11 etc. That is,
The planting work unit 3 is mounted on the traveling body 1 via the lifting link mechanism 2.
The holder frame 4 connected to the above is rotatably supported via a rolling support shaft 5, but the above basic configurations are all conventional.

Reference numeral 12 denotes an intermediate frame provided between the holder frame 4 and the planting work portion 3, and a boss portion 12a integrally formed at a lower end portion of the intermediate frame 12.
Is rotatably fitted and supported on the boss portion 4a of the holder frame 4. That is, the intermediate frame 4 is allowed to roll relative to the holder frame 4 and the planting work unit 3, and the rolling fulcrum is the rolling fulcrum.
It is designed to match the rolling fulcrum of. Also,
The intermediate frame 4 is a frame body 12b in an upright posture.
And a T-shaped frame portion 12c protruding forward from the upper end of the frame main body 12b along the back side of the seedling mounting table 9. The intermediate frame 12 in side view is the seedling mounting table. It is arranged so as to be located between the support stay 6 a and the seedling table 9.

Reference numeral 14 denotes a first rolling bullet which is composed of a pair of left and right coil bullets, and the first rolling bullet 14 is located between the frame body 12b of the intermediate frame 12 and the working frame 6. It is installed in a V shape. In other words, the overall load of the planting work unit 3 is balanced based on the elastic holding action of the first rolling bullet 14, but at the time of planting work, the joint shaft (the body side PTO shaft and the working unit side input shaft are connected together). ) Since the planting work unit 3 tries to roll in a predetermined direction based on the rotational force of J, a biasing force larger than that of the other coil ammunition is set to the coil ammunition on the side that extends during rolling in that direction. This keeps the posture of the working unit parallel during planting work.

Reference numeral 15 is a second rolling bullet which is composed of a pair of left and right coil bullets. The second rolling bullet 15 has a T-shaped frame portion 12c of the intermediate frame 12 and left and right sides of the seedling placing table 9. It is provided in a V-shape between both end portions so as to balance an unbalanced load due to the lateral feeding of the seedling placing table 9. That is, the planting work unit 3 which can be freely rolled is held by the first and second rolling bullets 14 and 15, and the center float 10 and the side float 1 are held.
The second rolling formed on the upper end of the T-shaped frame portion 12c is configured so as to perform a so-called driven rolling control that allows a driven paddy surface following action of the planting work unit 3 based on the buoyancy of 1. Locking holes 12d for the ammunition 15 and the second rolling ammunition 1 formed at the left and right ends of the seedling stand 9.
A plurality of engaging holes 9a for 5 are arranged side by side at a predetermined interval in the left-right direction. Therefore, the engaging holes 12d, 9
The biasing force of each second rolling ammunition 15 can be adjusted based on the change of a. The second rolling ammunition 15 is attached to the engaging hole 9a as shown in FIG.
Not only may it be directly engaged with (12d), but it may be engaged with a bolt b screwed into an engagement hole 9a (12d) as shown in FIG.

By the way, the upper end portion of the T-shaped frame portion 12c in which the engaging hole 12d is formed is formed by a horizontal frame 12e facing left and right.
e is a separate body from the T-shaped frame 12c, and is a pair of left and right protruding bars 1 protruding downward from the horizontal frame 12e.
2f is configured to be attachable / detachable by inserting / removing into / from the hollow portion 12g of the T-shaped frame portion 12c.

On the other hand, reference numeral 16 denotes a motor (actuator) having a speed reducing mechanism which is provided at a lateral position of the holder frame 4 via a bracket 17, and the pinion gear 16a for outputting the driving force of the motor 16 has a bracket. 1
7, an intermediate gear (driving gear) 18 rotatably provided is meshed with the intermediate gear 18.
The gear portion 19a of a rack (driven gear) 19 that projects laterally from 2 (which is curved in an arc shape around the rolling fulcrum of the intermediate frame 12) meshes with the gear portion 19a from above. That is, between the holder frame 4 and the intermediate frame 12, the intermediate frame 1 is driven by the drive of the motor 16.
A forced rolling control mechanism for forcibly rolling 2 in the left-right direction is configured.

Now, on one side edge of the bracket 17,
Mounting piece 17 having a plurality of mounting holes 17a lined up and down
b is bent and formed. Then, the bolt B inserted through the mounting hole 17a and the mounting hole on the side of the intermediate frame 12
The bracket 17 is integrally attached to the side surface portion of the intermediate frame 12 by tightening the nut N with the nut N. The attachment hole 17a is formed as a long hole in the up-down direction. In the closed state, the bracket 1
The meshing of the intermediate gear 18 and the rack 19 can be released by sliding 7 upward.

Reference numeral 20 denotes a pendulum type rolling detection sensor provided on the rear surface of the intermediate frame 12 via an L-shaped sensor bracket 20a. The rolling detection value of the rolling detection sensor 20 is not shown. Is input to the control section, and in the control section, the motor 16 is driven in the forward and reverse directions so as to match the input rolling detection value with a predetermined set value (horizontal set value or tilt set value), and based on the control. Forced rolling control (horizontal control or tilt control) of the intermediate frame 12 in a fixed posture
It is about to do.

Reference numeral 21 denotes a restriction pin projecting rearward from the intermediate frame 12, and the restriction pin 21 is loosely fitted into a recess 22a of a restriction plate 22 provided integrally with the planter case 7 to be planted. The rolling control mechanism of the attachment working unit 3 is configured. That is, the regulation pin 21 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 B, but the planting work unit with respect to the intermediate frame 12 is allowed. Three
When the relative rolling angle of 1 reaches a predetermined angle B, the rolling contact is made to the left and right ends of the recess 22a to restrict further rolling of the planting work part 3.

Reference numeral 23 is a T-shaped frame 1 of the intermediate frame 12.
A bracket protruding downward from 2c. The lower end of the bracket 23 is in contact with the front surface of a guide plate 24 provided at the upper end of the holder frame 4 so as to be slidable from side to side. That is, a tilting restraint mechanism that restrains the tilting of the intermediate frame 12 that receives the biasing force of the rolling bullets 14 and 15 toward the rear on the basis of the contact of the bracket 23 with the guide plate 24 is configured.

Further, a pair of left and right cylindrical members 23a are provided in a protruding manner on the guide plate contact surface of the bracket 23, and a part of each cylindrical member 23a is exposed from the tip of the cylindrical member 23a and is guided by the guide plate. A ball 25 is rotatably abutted on the ball 24. That is, the sliding resistance between the bracket 23 and the guide plate 24 due to the rolling of the intermediate frame 12 can be minimized.

A pair of left and right bent pieces 24a are formed at the left and right ends of the guide plate 24 so as to face each other with the lower end of the bracket 23 interposed therebetween.
The left and right contact pieces 23b formed on the bracket 23.
Limit switch 26 that detects and operates based on contact with
Are provided respectively. That is, the left and right limit switches 26 are the intermediate frame 1 with respect to the holder frame 4.
When the relative rolling angle of No. 2 reaches the predetermined angle A, it is contact-detected, and the detection signal is output to the control unit to automatically stop the motor 16.

On the other hand, 27 is a lock pin provided on the holder frame 4, and the lock pin 27 is supported by a bracket 28 provided on a side portion of the holder frame 4 so as to be slidable forward and backward so as to be slidable forward and backward. However, a motor or the like can be operated by inserting (backward sliding operation) into a lock hole 29a formed in an ammunition bracket 29 (for engaging the first rolling ammunition 14) of the intermediate frame 12. When the failure occurs, the rolling of the intermediate frame 12 can be locked at the neutral position.

Reference numeral 30 denotes a boss member which is integrally fitted and assembled to the intermediate portion of the lock pin 27.
The bolt shaft 30a protruding upward from 0 is used for the bracket 2
8 penetrates through a long hole 28a formed facing forward and backward, and is screwed into a nut 31. When the nut 31 is loosened, the bolt shaft 30a moves along the long hole 28a to allow the slide operation of the lock pin 27, while when the nut 31 is tightened, the bolt shaft 30a is moved.
The lock pin 27 can be fixed at an appropriate position by restricting the movement of a. However, the tightening force of the nut 31 acts only in the vertical direction, and therefore the shift of the lock pin 27 accompanying the tightening of the nut 31 causes the intermediate frame 12 to move. It is possible to avoid the inconvenience that the lock position changes from side to side.

In the embodiment of the present invention configured as described above, the intermediate frame 12 which is freely rotatable relative to the holder frame 12 and the planting work section 3 is provided, and the intermediate frame 12 and the planting work section 3 are provided. While the rolling ammunition 14 and 15 are provided between the intermediate frame 12 and the holder frame 4, the forced rolling control mechanism is provided between the intermediate frame 12 and the holder frame 4, and the motor 16 of the forced rolling control mechanism is provided in the intermediate frame 12. Drive control is performed based on the detection of the rolling detection sensor 20 provided, and composite rolling control is performed. That is, the intermediate frame 12 is controlled to a constant posture (horizontal posture or inclined posture) regardless of the rolling of the body to expand the effective range of the driven rolling control by the rolling bullets 14 and 15. The bracket 17 to be assembled can be slid upward by loosening the bolt B, so that the meshing between the intermediate gear 18 and the rack 19 is released and the intermediate frame 12 is released.
It is possible to allow free rolling of. Therefore, the neutral lock operation of the intermediate frame 12 by the lock pin 27 becomes easy, and when the rolling ammunition 14, 15 is attached or detached, the intermediate frame 1
By moving 2 by hand to the left and right, it is possible to attach and detach the rolling ammunition 14 and 15 with the ammunition mounting interval shortened as much as possible. As a result, the rolling ammunition 1
It is not possible to remarkably improve the workability when attaching and detaching 4, 15 and it is possible to surely eliminate the inconvenience that the rolling ammunition 14 and 15 are damaged by applying an excessive force when attaching and detaching. .

Moreover, when the intermediate frame 12 is allowed to freely roll, the left and right rolling ammunition 14, 1
Since the intermediate frame 12 moves to a position where 5 is in opposition, the left and right rolling ammunition 1
It becomes possible to easily perform the balance adjustment of Nos. 4 and 15, and as a result, as in the case of performing the balance adjustment in the state where the intermediate frame 12 is locked, in particular, the working part 3 with replanting is lifted to bring the balance state. You can eliminate the hassle of checking.

Furthermore, the mechanism for moving the intermediate gear 18 from the rack 19 in the disengaging direction is the intermediate gear 1
Since the mounting hole 17a of the bracket 17 to which 8 is assembled is simply formed as a long hole, there is no need to add additional parts or adopt a complicated structure.

Further, by making the bracket 12 slidable, there is also an advantage that the meshing depth of the intermediate gear 18 and the rack 19 can be easily adjusted (backlash adjustment).

Further, since the horizontal frame 12e to which the left and right second rolling bullets 15 are attached is detachably attached to the intermediate frame 12, it is safe to remove the second rolling bullet 15 from the horizontal frame 12e. Can be done. In other words, when the horizontal frame 12e is provided integrally with the intermediate frame 12, it is necessary to pull the second rolling ammunition 15 one by one to engage with the horizontal frame 12e, but to remove the horizontal frame 12e. In the state,
The left and right second rolling bullets 15 can be attached to the horizontal frame 12e without further pulling, and in this state, the left and right second rolling bullets 15 are in a balanced state, so the horizontal frame 12e can be easily Intermediate frame 1
As a result, it is possible to greatly improve the workability and safety in the ammunition assembling work.

Furthermore, in the present embodiment, since the plurality of engaging holes 12d and 9a of the second rolling ammunition 15 are arranged in parallel in the left-right direction at predetermined intervals, the engaging holes 12 are formed.
Each second rolling ammunition 1 based on the change of d, 9a
The biasing force of No. 5 can be easily adjusted, and accordingly, the left and right imbalance due to the variation of parts and the assembly error can be easily eliminated based on the adjustment of the biasing force of the second rolling ammunition 15.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and for example, the gear to be disengaged may be any gear as long as it constitutes the power transmission path of the forced rolling control mechanism. May be

[0025]

In summary, since the present invention is constructed as described above, it is possible to forcibly perform the rolling control of the working unit which is driven by the rolling ammunition and which is driven by the actuator. However, since the meshing between the drive gear and the driven gear that compose the forced rolling control mechanism can be released based on the movement of either one of the gears, the rolling ammunition of the rolling ammunition is released in the meshing released state. Not only can the attachment / detachment work and the balance adjustment work be performed, but also the rolling lock work can be performed without being affected by the forced rolling control mechanism, and as a result, the workability in attaching / detaching the rolling ammunition and the like can be significantly 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 planting work unit.

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

FIG. 4 is an enlarged side view of the main part of the same.

FIG. 5 is an enlarged front view of a main part of the same.

FIG. 6 is an enlarged plan view of an essential part of the same.

FIG. 7 is an exploded perspective view of the same.

8 (A) and 8 (B) are a front view and a side view showing an ammunition engaging portion of the seedling placing table.

9 (A) and 9 (B) are a front view and a side view of an ammunition engaging portion showing another example.

10A and 10B are a front view and a side view of a bracket.

FIG. 11 is a front view of essential parts showing a detachable structure of a horizontal frame.

FIG. 12 is a front view of an intermediate frame lock mechanism.

FIG. 13 is a plan view of the same.

FIG. 14 is a side view of the same.

[Explanation of symbols]

 1 traveling machine body 2 lifting link mechanism 3 planting working part 4 holder frame 5 rolling spindle 6 working part frame 12 intermediate frame 14 first rolling bullet 15 second rolling bullet 16 motor 17 bracket 17a mounting hole 19 rack 20 rolling detection Sensor

Claims (1)

[Claims] 1. A working unit in which a working position in which a working posture is passively controlled to roll by a pair of right and left rolling ammunition is provided with a forced rolling control mechanism for performing forced rolling control based on actuator driving. In a traveling vehicle, the forced rolling control mechanism is configured by using a drive gear on the actuator side and a driven gear that meshes with the drive gear, and one of these gears is to disengage from the other gear. A rolling control device for a working unit in a work vehicle, comprising a moving mechanism capable of moving.