JP2575699Y2 - Rolling control device for working unit in work vehicle - Google Patents

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 unit in a work vehicle such as a riding rice transplanter.

[0002]

2. Description of the Related Art
In a working vehicle connected to this type of working unit, when the traveling machine body rolls due to unevenness of the field, inclination, obstacles, etc., the working unit also rolls integrally following the rolling, so that the field scene or There is an inconvenience that the working unit attitude with respect to the horizontal plane changes and the working accuracy is significantly reduced. Therefore, conventionally, a work unit is connected and supported in a freely rotatable manner, and the work unit is so-called free-rolling control that allows the work unit to be freely held by a rolling elastic machine to maintain a free attitude of the work unit. There is proposed a so-called forced rolling control for forcibly rolling a working section by an actuator operation based on detection of a horizontal sensor or the like. However, in the free rolling control, there is a limit to the amount of rolling that can be controlled.Therefore, in a field with severe unevenness, there is a drawback that the working unit follows the rolling of the traveling machine body and is greatly inclined. In this case, it is necessary to lower the control sensitivity in order to prevent a so-called hunting phenomenon peculiar to the automatic control and a malfunction due to a false detection, so that it is difficult to perform the control with a desired accuracy. As a result, any rolling control is sufficient. In fact, it was not possible to ensure work accuracy.

[0003]

SUMMARY OF THE INVENTION The present invention has been conceived in view of the above-mentioned circumstances, and has as its object to provide a rolling control device for a working unit in a working vehicle that can eliminate these drawbacks. A work vehicle having a working unit rotatably connected to a traveling body side, wherein a rolling member is provided between the traveling body side and the working unit side, and the rolling unit is configured to be rotatable with respect to the traveling body side and the working unit side. A free intermediate control member is provided between the intermediate member and the working unit, and a free rolling control mechanism is provided between the intermediate member and the working unit for performing free rolling control of the working unit based on expansion and contraction of the rolling machine (15). between the intermediate member traveling machine body side, and a forced rolling control mechanism to force the rolling control of the intermediate member on the basis of the operation of the actuator, Lori intermediate member with respect to the travel machine body To lock the grayed a releasable locking mechanism the forced rolling control to the left and right of the intermediate member min
It is characterized by being interposed so as to be dispersed . According to the present invention, with this configuration, the accuracy of the rolling control is dramatically improved, and the work can be continued while executing the free rolling control even when the forced rolling control mechanism fails. is there.

[0004]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine of a riding type rice transplanter, and a planting work section 3 is connected to a rear portion of the traveling machine 1 via an elevating link mechanism 2 that operates to raise and lower hydraulic pressure. The planting work section 3 is rotatably supported by a link connecting frame 4 connected to a rear end of the lifting link mechanism 2 and a boss tube 4a formed at a lower end of the link connecting frame 4. A first rolling support shaft 5, a substantially U-shaped seedling mounting base support frame 6 integrally connected to a rear end of the first rolling support shaft 5, and an integral part of the seedling mounting support frame 6. A planer case 7 having a substantially letter-like shape in plan view, a planter arm 8 provided at each rear end of the planter case 7, an upper end of the seedling support frame 6, and an upper part of the planter case 7 The seedling mounting table 9 which is freely supported and is forcibly reciprocated right and left based on the lateral feeding action of a lateral feeding mechanism provided in the planter case 7, and swings up and down at the center of the bottom of the planter case 7 and on both left and right sides. Freely provided Is composed of centers float 10 and the side floats 11 and the like. That is, the planting work unit 3 moves the traveling body 1 (link connection frame 4)
In the planting operation state in which the first rolling support shaft 5 can be freely rolled with the fulcrum as a fulcrum and the buoyancy of the center float 10 and the side float 11 slides on the rice field, the planter arm 6 is synchronized with the planting timing. The seedlings to be planted are scraped from the seedling mounting table 9 which is fed side by side at a predetermined pitch, and planted on the rice field.

[0005] Further, reference numeral 12 denotes the link connection frame 4.
Armature mounting frame located near the rear of the
Although it corresponds to the intermediate member of the present invention,
The boss tube portion 12a formed at the lower end of the second support shaft 2 rotatably supports a second rolling support shaft 13 protruding rearward from a position near the first rolling support shaft of the link connection frame 4 toward the rear. For this reason, the ammunition mounting frame 12 is configured to be freely rollable with respect to the traveling body 1 (the link connection frame 4) with the second rolling support shaft 13 as a fulcrum.

[0006] Reference numerals 14 and 15 denote a pair of left and right rolling ammunitions each comprising a coil ammunition. Of the rolling ammunition 14 and 15, the rolling ammunition 14 includes the above-mentioned ammunition mounting frame 12 and the seedling mounting. It is interposed between the table support frame 6 and the base support frame 6 to allow voluntary rolling of the planting work unit 3 by float buoyancy, while the other rolling bullet 15 is provided with a bullet mounting frame 12 and a seedling. It is interposed in a C-shape between it and the mounting table 9 so as to balance the unbalanced load accompanying the lateral feeding of the seedling mounting table 9. In other words, the so-called free rolling control mechanism is constituted by interposing the above-mentioned rolling machines 14, 15 between the machine mounting frame 12 and the planting work section 3 side.

[0007] On the other hand, reference numeral 16 in FIG.
Shall apply in electric cylinders disposed on the right side of the arm 4, the upper end portion of the electric cylinder 16, while being connected to the arm portion 4b projecting from the link connection frame 4 to the side, the lower end, the bullet machine It is connected to an arm portion 12b protruding from the mounting frame 12 to the same side. In other words, a so-called forced rolling control mechanism for forcibly rolling the planting work unit 3 (armature mounting frame 12) based on the expansion and contraction of the electric cylinder 16 is provided between the link connecting frame 4 and the armature mounting frame 12. It is configured.

Further, reference numeral 17 denotes a gravity sensor provided on the rear surface of the machine mounting frame 12 facing the seedling mounting table 9, and the gravity sensor 17 detects the horizontal of the machine mounting frame 12, It is configured to output the detected value to a cylinder control circuit (not shown). Then, in the cylinder control circuit, the electric cylinder 16 is rotated to roll the frame 12 against the detection of the gravity sensor 17.
By outputting an operation signal to the armature mounting frame 12, the horizontal position is always maintained regardless of the rolling of the traveling body 1.

Further, reference numeral 18 denotes a link connection frame 4.
Mechanism between the armature mounting frame 12 and
And the locking mechanism 18In FIG.Ammunition mounting
Provided on the left side of the frame 12Engagement bracket 21
And an L-shaped part provided on the link connecting frame 4 side.
Tsuk plate 20And a locking pin 19 integral therewith.When
Consists of. BTsukplate 20 is link-connected
The through holes 20a pass through the left and right side surfaces of the frame 4.
Slidably forward and backward through a pair of bolts 22
ing. Then, the lock plate 20 is moved to the front non-
In the state where it is fixed at the hook position (fixed by bolt 22)
The locking pin 19 and the hole 21b of the engagement plate 21
Because they do not engage,
The rolling of the attached frame 12 is allowed to permit the
Locking control, while locking plate 20
In the state where it is fixed to the rear lock position,Engagement bracket
21 holes 21bIs engaged with the lock pin 19,
Of the mounting frame 12 to the connecting frame 4
Controlling the ring to release forced rolling control
I'm sorry

[0010] In the embodiment of the present invention configured as described above, the planting work unit 3 includes the traveling body 1 and the elevating link mechanism 2.
Is rotatably connected to the link connecting frame 4 via the first rolling support shaft 5 as a fulcrum. The mounting frame 12 is rotatably connected, and
While rolling ammunition machines 14 and 15 constituting a free rolling control mechanism are interposed between the planting work section 3 and the planting work section 3,
An electric cylinder 16 that constitutes a forced rolling mechanism is interposed between the frame 12 and the link connecting frame 4. In other words, the planting work unit 3 performs the forced rolling control for controlling the armature mounting frame 12 to be in the horizontal posture based on the expansion and contraction control of the electric cylinder 16 and the planting based on the elastic expansion and contraction of the rolling bullets 14 and 15. Rolling control is performed in a complex manner with free rolling control allowing the independent rolling of the working unit 3. Therefore, in comparison with the case where only the free rolling control is performed or the case where only the forced rolling control is performed, a large rolling control range can be ensured. As a result, even in a field with severe unevenness, the planting work unit 3 can be used. The rolling control is reliably performed, and the working accuracy can be significantly improved.

In addition, the forced rolling control is performed within the control range of the free rolling control because the control range of the free rolling control is always enabled by displacing the control range of the free rolling control according to the amount of rolling of the planting work section 3. If the sensitivity of the forced rolling control is reduced, the control accuracy does not decrease even if the sensitivity is reduced.As a result, the hunting phenomenon and the malfunction due to erroneous detection in the forced rolling control are prevented, and the control accuracy and smoothness of the rolling control are improved. kill at improvement.

Further, a lock mechanism 18 is provided between the link connecting frame 4 and the armature mounting frame 12 so as to lock the rolling of the armature mounting frame 12 with respect to the link connecting frame 4. Even if the provisional forced rolling control is disabled due to the failure of the engine 16 or the like, if the rolling of the bullet mounting frame 12 is locked by the locking mechanism 18, the work can be continued while executing only the free rolling control. Therefore, it is possible to solve the problem that the work efficiency is reduced due to the inoperable state . Moreover, a forced rolling mechanism and a rocking machine
The structure 18 is distributed on both sides of the frame 12
Inspection of the forced rolling mechanism
The lock of the lock mechanism 18 and the release work are available
It can be easily done from the side of the aircraft, and the workability is improved.

Furthermore, in the above-described embodiment, the locking pin 19 of the locking mechanism 18 is mounted on the bullet engaging bracket 21 for engaging the rolling bullet 14, so that a bracket for the locking pin 19 is required. As a result, the number of parts can be reduced and the structure can be simplified.

It should be noted that the present invention is not limited to the above-described embodiment, and, for example, FIGS.
As in the second embodiment shown in FIG. 7, the armature engaging bracket 21 is formed to extend outward, and a plurality of the plurality of armature mounting brackets 12 are arranged on the extended formed machine engaging bracket 21 in the rolling direction of the machine mounting frame 12. The lock pin mounting hole 21a may be formed. That is, in the second embodiment, it is possible to lock the armature mounting frame 12 in the inclined posture based on the selective replacement of the locking pins 19 with respect to the plurality of locking pin mounting holes 21a. when working traveling, there is an advantage that can top toward the O connexion working precision to the bullet machine mounting frame 12 to fixedly along its slope.

[0015]

[Effects] In summary, since the present invention is configured as described above, while controlling the rolling operation of the working unit, there is a space between the running machine and the working unit. Rollable intermediate members are interposed respectively, and between the intermediate member and the working unit,
While a free rolling control mechanism that controls the free rolling of the working unit based on the expansion and contraction of the rolling ammunition is provided,
Between the intermediate member and the traveling body side, a forced rolling control mechanism for forcibly controlling the working unit based on the operation of the actuator is provided.
Rolling control is performed in a complex manner based on the free rolling control and the forced rolling control. Therefore, it is possible to secure a sufficient rolling control range as compared with the case where the free rolling control or the forced rolling control is performed alone, and as a result, it is possible to eliminate a problem that the control becomes impossible in a field with severe unevenness and the rolling is performed. kill the accuracy of the control in the improvement.

Moreover, the forced rolling control by the actuator acts to displace the control range of the free rolling control according to the rolling amount.
Whether free rolling control can be enabled and fine-grained control can be performed irrespective of the state of the field, or the sensitivity of forced rolling control is reduced without lowering control accuracy within the control range of free rolling control. As a result, the hunting phenomenon in the forced rolling control and the malfunction due to the erroneous detection can be eliminated, and the control accuracy in the rolling control can be further improved.

Further, since a locking mechanism capable of locking the rolling of the intermediate member with respect to the traveling body is interposed between the intermediate member and the traveling body, even if the forced rolling mechanism fails. If the forced rolling control is released based on the locking operation of the locking mechanism, the work can be continued while only the free rolling control is executed. Therefore, the work cannot be performed due to the failure of the forced rolling control mechanism. Troubles can be resolved
You. In addition, the forced rolling mechanism and the locking mechanism are in the middle
Since it is interposed so that it is dispersed on the left and right of the material, it is compulsory
Inspection and maintenance of the rolling mechanism, locking of the locking mechanism and its
Work can be easily performed from the side of each corresponding aircraft.
The performance is improved.

[Brief description of the drawings]

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

FIG. 2 is a side view of a planting work section.

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

FIG. 4 is a sectional view of an essential part of the same.

FIG. 5 is a side view of a main part showing a locking mechanism.

FIG. 6 is a front view of a main part of a planting work section showing another example.

FIG. 7 is an enlarged front view of a main part of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling body 2 Elevating link mechanism 3 Planting work part 4 Link connecting frame 5 First rolling support shaft 12 Ammunition mounting frame 13 Second rolling support shaft 14 Rolling machine 15 Rolling machine 16 Electric cylinder 17 Gravity sensor 18 Lock mechanism 19 locking pin 20 locking plate

Continuation of the front page (56) References JP-A-5-252805 (JP, A) JP-A-5-49318 (JP, A) JP-A-2-135015 (JP, A) (58) Fields investigated (Int) .Cl. ⁶ , DB name) A01C 11/02

Claims (1)

(57) [Scope of request for utility model registration] 1. A work vehicle in which a working unit is rotatably connected to a traveling body side, wherein the working vehicle is provided between the traveling body side and the working unit side with respect to the traveling body side and the working unit side. A free-rolling intermediate member is interposed, and a free-rolling control mechanism that controls the free-rolling of the working unit based on the expansion and contraction of the rolling machine is provided between the intermediate member and the working unit. between the the traveling machine body side, the intermediate portion based on the operation of the actuator
A forced rolling control mechanism for forcibly controlling the rolling of the material and a locking mechanism for locking the rolling of the intermediate member with respect to the traveling body side and releasing the forced rolling control are interposed so as to be distributed on the left and right sides of the intermediate member. A rolling control device for a working unit in a work vehicle.