JPH07303403A - Agricultural working machine - Google Patents

Abstract

PURPOSE:To obtain an agricultural working machine, equipped with right and left operation parts on both sides in the width directions of a machine in a central operating part so as to enable the free rotation around pivot shafts which are located a little to the center from both lateral ends of the central operating part, hardly moving the center of gravity in folding without causing untilled parts and excellent in maneuverability and stability. CONSTITUTION:This agricultural working machine is obtained by freely rotatably installing right and left operating parts 6 and 7 on both sides in the width direction of the machine in a central operating part 3 around pivot shafts 26 and locating the pivot shafts 26 a little to the center from both lateral ends of the central operating part 3. Furthermore, the respective operating parts 3, 6 and 7 have clutch mechanisms suitably connecting the mutual operating shafts and a transmission mechanism 8 for transmitting power to the operating shafts is preferably installed only on one lateral side of the machine body. Thereby, the pivot shafts 26 are preferably slightly tilted from the horizontal state so as to develop the right and left operating parts 6 and 7 obliquely rearward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural work machine connected to a tractor or the like.

[0002]

2. Description of the Related Art In an agricultural working machine connected to an elevating device provided at the rear of a tractor or the like, particularly in a halo or a cultivator having a width in a direction orthogonal to the traveling direction, both sides of the machine body are set to the center side. A foldable structure is known. For example, in Japanese Utility Model Laid-Open No. 1-163907, the working width extending to the left and right is rotated around a vertical or inclined connecting pin provided on the main body frame to substantially reduce the width of the working machine, It is designed for convenience of storage. Further, as shown in FIG. 7, the tiller disclosed in JP-A-61-282001 includes a central tiller 102 connected to a rear portion of a tractor 101, and side tillers 103 and 104 provided on both sides thereof. It is configured to be rotated about horizontal shafts 105 and 106 as required.

[0003]

By the way, in the above-mentioned conventional agricultural working machine, by deploying the left and right working machines having a considerable weight, the center of gravity largely moves upward or backward, and the maneuverability in the folding posture and There was a problem that stability was reduced.

Further, since a chain case and a gear case for transmitting power to the left and right working machines are provided at both ends or between the central tilling device 102 and the side tilling devices 103 and 104, only the installation places thereof are provided. There was a problem that it was difficult to plow and it was difficult to re-plow.

Therefore, in view of the above circumstances, the present invention was devised to provide an agricultural work machine capable of preventing a decrease in maneuverability and stability during folding, and an agricultural work machine free from residual tillage.

[0006]

SUMMARY OF THE INVENTION According to the present invention, in an agricultural working machine in which left and right working parts are provided on both sides of the central working part in the machine width direction so as to be rotatable about a pivot, the pivot is located at the center rather than both ends of the central working part. It is located closer to you. It is preferable that each of the working units has a clutch mechanism that appropriately connects the working shafts to each other, and a transmission mechanism that transmits power to the working shafts is provided only at one end of the machine body. It is preferable that the pivot shaft is formed to be slightly inclined with respect to the horizontal so as to deploy the left and right working units obliquely rearward. It is preferable that the left and right working portions are formed so as to be located inward of both side ends of the central working portion when deployed obliquely rearward. Further, a fixing device may be provided between the central working unit and the left and right working units so as to fix these working units in a posture in which they are aligned in the machine width direction.

[0007]

With the above construction, the length of the left and right working portions is shorter than the total length of the portion which rotates about the pivot axis, and movement of the center of gravity when folded to the central working portion side is suppressed. The clutch mechanism connects the respective work shafts when the left and right work units are connected to the central work unit in the machine width direction. The transmission mechanism transmits the driving force from one side end to each work shaft by connecting the clutch mechanism. The structure in which the pivot axis is appropriately tilted prevents the center of gravity from moving significantly backward and avoids interference with the power side of the tractor or the like. Due to the configuration in which the left and right working units are deployed inside the central working unit, the machine width in the folded position can be the length of the central working unit. Further, in the fixing device, the respective working units maintain a straight posture.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show an example of an agricultural working machine according to the present invention as applied to a halo 1. The halo 1 is configured to have a central working unit 3 connected to a rear portion of a tractor (not shown), a left working unit 6 and a right working unit 7 arranged on both sides in the machine width direction, The left and right working parts 6 and 7 are rotatable around a support shaft pin 26 that is a pivot, and are folded toward the center side as necessary. The working units 3, 6 and 7 include working shafts 40, 70 and 75 extending in the machine width direction and working shafts 40, 70 and 75.
It is composed of a large number of work claws 41 radially attached at predetermined intervals in the axial direction, and the work claws 41 are swung by the rotational drive of the work shafts 40, 70, 75, so that crushed soil, scrubbing, etc. can be performed. Has become. Each work axis 40, 70, 75
Are suspended by parallel hollow main rods 14 and 15 and left and right connecting rods 46 and 72, respectively.
4, 15 and the central working unit 3 are integrated into the main frame 2
The left connecting rod 46 and the left working portion 6 integrally configure the left frame 4, and the right connecting rod 72 and the right working portion 7 integrally configure the right frame 5, respectively.

A mission 13 is provided at an intermediate position (center in the machine width direction) between the main rods 14 and 15, and an input shaft 11 for receiving a rotational driving force from a driving source such as a tractor is accommodated therein. At the top of the mission 13 and on both sides thereof, a top stay 22 for connecting with a lifting device such as a three-point link is provided.
And lower arms 20 and 21 are provided. Main rod 1
A connecting member 1 protruding radially in both outer ends of 4, 15.
6 and 17 are formed to face the tubular connecting member 47 having a rectangular cross section formed at the ends of the left and right connecting rods 46 and 72. The tip ends of these connecting members 16, 17, 47 are appropriately overlapped, and the spindle pin 26 is inserted at the upper end position. In the present embodiment, the spindle pin 26 extends in the traveling direction F in plan view and is slightly inclined so that the front is higher (about 15 degrees from the horizontal). That is, as shown by the chain double-dashed line in FIG. 2, the left and right frames 4 and 5 can be folded obliquely upward and rearward.

The position of the spindle pin 26 is located closer to the center than both ends of the central working portion 3 (indicated by the vertically extending axis B in FIG. 1). In other words,
The lengths of the main rods 14 and 15 are formed to be shorter than the width W of the central working portion 3 (the length of the central working shaft 40).
Further, in this embodiment, the left and right frames 4 and 5 are expanded and moved by 90 degrees or more (110 to 115 degrees), and the outer ends of the left and right working parts 6 and 7 (rotation of the tip of the work claw 41 at that time) The track P) does not protrude from both end positions (B) of the central working unit 3. That is, the width W of the central working unit 3
The main rods 14 and 15 so that
The lengths of the left and right connecting rods 46 and 72 are set.

Next, the rotation drive system of the halo 1 is composed of the left main rod 1
4 is provided inside and the input shaft 11 is the bevel gear 9, 1
The first output shaft 12 connected by 0 and the left working shaft 70 provided inside the left connecting rod 46 are formed by the second output shaft 55 connected by the transmission 8. The first output shaft 12 and the second output shaft 55 are respectively operated by the first clutch mechanism 121, and the work shafts 70, 40, 75 are respectively operated by the second clutch mechanism 122 and the third clutch mechanism (not shown). It is designed to be joined and separated.

As shown in FIG. 4, the input shaft 11 is supported on both sides of the transmission 13 by two bearings 11a and 11b, and its bevel gear 9 is mounted near one bearing 11b. The first output shaft 12 is the left main rod 1.
4 is supported by bearings 23 provided at both end positions, and one end is inserted into the mission 13 so that the input shaft 11
A bevel gear 10 that meshes with the bevel gear 9 is attached. The other end of the first output shaft 12 projects inwardly of the connecting member 16, and the claw clutch member 25, which is the first clutch mechanism 121, is spline-connected. The second output shaft 55 is supported by bearings 54 provided at both ends of the left connecting rod 46, and one end of the second output shaft 55 projects inward of the connecting member 47 and meshes with the pawl clutch member 25 of the first output shaft 12. 5
6 is splined so as to be slidable in the axial direction. A compression spring 60 is provided between the base end of the pawl clutch member 56 and the bearing 54, and urges the pawl clutch member 56 in a protruding direction. A retaining plate 61 that locks the pawl clutch member 56 is attached to the shaft end surface of one end of the second output shaft 55. The other end of the second output shaft 55 projects from the left connecting rod 46, and a sprocket 57 serving as the transmission 8 is attached to the second output shaft 55.

The left working shaft 70 is attached to the left side plate 49 attached to the flange 48 of the left connecting rod 46, and the clutch case 67 suspended by the supporting plate 63 attached to the bracket 53 of the left connecting rod 46. Bearings 69 and 36, respectively
Both ends are supported via. Then, at one end of the left working shaft 70, the chain 5 is attached to the sprocket 57 of the second output shaft 55.
A sprocket 71 connected at 8 is attached.
The sprockets 57, 71 and the chain 58 are hermetically covered by a chain case 59 attached to the left side plate 49. A pawl clutch member 68, which serves as a second clutch mechanism 122, is attached to the other end of the left work shaft 70 by spline connection, and is pivotally supported in the clutch case 67. A clutch member 39 is attached to both ends of the central work shaft 40 by spline coupling (the right side is not shown), and is supported by a clutch case 98 via a bearing 37. The clutch case 98 is supported by two auxiliary rods 32 arranged in parallel below the main rods 14 and 15.
The main rods 14 and 15 and the auxiliary rod 32 are connected by a suspension plate 43 attached to the lower end of the connecting member 16. The auxiliary rod 32 and the clutch case 98 are connected by the support plates 35 provided at both ends of the auxiliary rod 32.

The right working shaft 75 has one end on the right connecting rod 72, the bracket 53, and the support plate 6, as with the left working shaft 70.
3, a shaft is supported via a clutch case (not shown), and the other end is supported by a bearing 74 on a right side plate 73 attached to the flange 48 of the right connecting rod 72. A clutch member similar to the clutch member 68 of the second clutch mechanism 122 is adapted to be brought into contact with and separated from the other end of the central work shaft 40. The left side plate 49, the support plate 63, and the support plates 35 facing each other with the work shafts 70, 40, and 75 sandwiched between them, and the inner side surfaces of the support plate 63 and the right side plate 73, respectively, have connecting plates extending in the front-rear direction. 65, 64, 33, and 34 are attached in an overlapping manner, and support cover bodies 42, 66, and 95 that cover the upper portions of the work claws 41 of the respective work units 3, 6, and 7. Flattened flat plates 45, 97, 96 are rotatably supported by the shaft 44 at the lower ends of the rear portions of the covers 42, 66, 65.

Next, a frame expanding means for expanding and moving the left and right frames 4 and 5 will be described. As shown in FIG. 1, the frame developing means includes a left frame 4 and a main frame 2.
Between the main frame 2 and the right frame 5, and an engaging member 51 and a mounting member 52, which are provided in a left-right symmetrical structure and are attached to the left and right connecting rods 46 and 72, respectively.
Locking members 18, 19 attached to the main rods 14, 15
And a tension spring 30 stretched between the mounting member 52 and the locking members 18 and 19. The engaging member 51 is formed of a plate erected on the left and right connecting rods 46 and 72, and is provided at a position to engage with the locking members 18 and 19 when the left and right frames 4 and 5 are folded. And the locking pin 50 extending in the traveling direction F on the upper side thereof.
Is attached. The mounting bracket 52 is the engagement member 51.
A locking rod 6 which is erected at a substantially intermediate position between the left and right connecting rods 46 and 72 on the outer side and is provided on the upper end thereof and which is adjustable in forward and backward directions.
2 supports one end of the tension spring 30. The locking members 18 and 19 are formed of plates standing upright near both outer ends of the main rods 14 and 15. The support pins 31 supporting the other ends of the tension springs 30 are attached to the locking members 18 and 19 and the upper portions thereof are bent appropriately. Thus, a groove portion 27 that is opened obliquely upward is formed. That is, the locking pin 50 of the engaging member 51 is fitted in the groove 27. And the locking members 18, 19
A hook 29 having a hook shape with its tip facing the groove 27 is rotatably provided on the upper part of the lock pin 50, and the locking pin 50 is inserted into the groove 27 by the pulling force of the small spring 28 provided at the other end. The locking pin 50 fitted in the groove 27 is restrained while guiding the entry.

Next, referring to FIGS. 5 and 6, the frame 2,
A fixing device 76 for fixing 4, 5 in a straight line will be described. Since the fixing devices 76 are the same on the left and right, the left frame 4 will be described here. This fixing device 76 is provided on the front side of the center cover body 42, an engaging bracket 78 provided on the rear side, a lever member 79 pivotally supported by the engaging body 77, and the left frame 4. Channel member 80, a hook 81 and a bell crank 82 supported by the channel member 80, and a connecting rod 83 for connecting them.
And a pulling rod 84 for engaging and disengaging the lever member 79 and the channel member 80.

The engagement body 77 is defined by a small plate in the shape of a box, and a part of the upper plate 86 and two front and left side surfaces are opened. The lower plate 85 is fixed in a state in which a vertical side plate 85 a extends downward and abuts on the upper surface of the central cover body 42. The lever member 79 is a protruding shaft 8 that serves as a pivot shaft.
The lever bracket 87 has a U-shaped side cross section in which 7a and 87b are extended in the vertical direction, and a handle 88 that is bent and connected from the base end of the lever bracket 87 as appropriate. The protruding shaft 87a protruding upward is locked in a hook-shaped groove 86b formed in the opening 86a of the upper plate 86, and is inserted into the through hole 94a of the fixed plate 94 attached to the upper surface of the upper plate 86. There is. The protruding shaft 87b protruding downward is inserted into a through hole 85c formed in the lower plate 85. Further, a pivot shaft 90 penetrating in the vertical direction is supported by the lever bracket 87 so as to be rotatable around its axis, and the pivot shaft 90 is
The base end of the tow rod 84 is attached. The leading end side of the tow rod 84 is a cutout portion 80 of the channel member 80.
An abutting piece 89 is threadably attached to the end of the abutting piece 89 so as to be adjustable.

The channel member 80 is attached to the bracket 53 of the left connecting rod 46, and the bell crank 82 is attached to the front.
A support shaft 91 for supporting the hook is provided on the rear side, and a support shaft 92 for supporting the hook 81 is provided on the rear side. The contact piece 8 of the tow rod 84 is attached to the front ends of the channel member 80 and the bell crank 82.
Recesses 80b and 82a that engage with 9 are formed coaxially. That is, when the handle 88 of the lever member 79 is positioned so as to extend forward, the abutting piece 8 of the tow rod 84 is located.
The bell crank 82 is restrained in a state in which 9 is locked to the channel member 80, and the lever member 79 in the drawing shows the shaft (87a, 8a).
7b) when it is rotated counterclockwise in the figure, the pivot shaft 90 is rotationally moved and the contact piece 89 of the tow rod 84 is moved.
The contact between the recesses 80b and 82a is loose. The connecting rod 83 is formed such that its length is adjustable, and both ends thereof are axially supported by the other end of the bell crank 82 and the base end of the hook 81 and extend along the traveling direction F. A shaft 93 that engages with the hook groove 81a at the tip of the hook 81 is erected on the engagement bracket 78. Therefore, when the bell crank 82 is restrained by the tow rod 84, the tip of the hook 81 is locked by the engaging bracket 78, and the tow rod 84 releases the restraint of the bell crank 82 and the pivot shaft 9 is released.
When it is swung forward (center side) around 0, the bell crank 82 and the hook 81 become free and rotate counterclockwise, respectively, so that the fixation between the main frame 2 and the left frame 4 is released. Will be punished. In addition, an engaging member 99 is provided between the lower ends of the leveling flat plates 45, 97, 96 to keep an appropriate distance so as not to intersect with each other when fixed by the fixing device 76.

Next, the operation of this embodiment will be described.

When working in a paddy field or the like, the left and right frames 4 and 5 are extended in the machine width direction so as to be aligned with the main frame 2 and the lever member 79 of the fixing device 76 is rotated forward so that a normal operation is performed. Fix in working position. At this time, the clutch members 25, 56, 68 of the clutch mechanisms 121, 122,
39 is in a state in which the claws 24 and 38 are engaged with each other. In particular, in the first clutch mechanism 121, since the claws 24 of the claw clutch members 25, 56 partially advance and come into radial contact with each other because they are located near the pivot point (support shaft pin 26). Since the claw clutch member 56 of the second output shaft 55 slides in the axial direction against the biasing force of the compression spring 60, the clutch connection is not hindered. If the clutch connection is confirmed, the top stay 22 and the lower arms 20 and 21 are connected to the three-point link of the tractor, and the input shaft 11 is connected to the drive shaft of the tractor (not shown).
Connect to. Thus, the rotational driving force is transmitted from the input shaft 11 to the left work shaft 70 via the bevel gears 9 and 10, the first and second output shafts 12 and 55, and the transmission device 8, and the second clutch mechanism 122 performs central work. It is also transmitted to the shaft 40 and the right work shaft 75 at the same time, and the work claw 41 is driven to rotate, so that the work claw 41 is crushed and scooped in as the tractor travels.

When the halo 1 is transported by a tractor or stored in a warehouse or the like, the lever member 79 of the fixing device 76 is rotated counterclockwise so that the contact piece 89 of the tow rod 84 and the bell crank 82 and After releasing the contact with the channel member 80, the traction rod 84 is rotated about 90 degrees around the axis of the pivot shaft 90 to be positioned on the center side. Then, the bell crank 82 is rotated around the shaft 91 to unlock the hook 81 and the shaft 93. Next, utilizing the urging force of the tension spring 30, the left and right frames 4 and 5 are expanded upward with the support shaft pin 26 as the center and folded to the center side. Then, the locking pin 50 of the engaging member 51 is fitted into the groove portion 27 of the locking members 18 and 19, and the hook 29
And the left and right frames 4 and 5 are fixed to the main frame 2. As a result, the working units 6 and 7 are held diagonally upward and rearward in a state where the working units 6 and 7 do not come out of the axis line B which is vertically erected from both ends of the central working unit 6.

In this way, the spindle pin 26 is attached to the central working unit 3
Since it is located closer to the center than both side ends (B), the weight of the working portions 6 and 7 of the entire left and right frames 4 and 5 to be deployed is small, and the center of gravity in the folded posture is located relatively downward. Therefore, it is possible to suppress the loss of maneuverability and stability when the vehicle is carried by a tractor. In other words, it is possible to achieve both the reduction of the machine width and the securing of the maneuverability and the stability. Left and right frames 4, 5
It can also reduce the power to raise the power. That is, like the present embodiment, it can be easily folded by utilizing the force of the tension spring 30. Further, in this embodiment, the tension spring 3
Since the locking members 18 and 19 and the engaging member 51 are provided side by side with each other so as to be automatically fixed with the unfolding movement, the folded left and right frames 4 and 5 can be easily hooked to the main frame 2. You can

Between the output shafts 12 and 55 and the work shaft 70,
Clutch mechanisms 121 and 122 are provided between 40 and 75, and a second working shaft 55 and a left working shaft 70, which are the left end of the machine body.
Since the transmission device 8 is provided at a position between and so as to transmit the rotational driving force, only the left end of the entire width of the machine body is the portion where the work is not performed, and the residual tillage that is difficult to re-cultivate does not occur. . For example, when cultivating the ridges of a ridge, by plowing so that the right working portion 7 is in contact with the side surface of the ridge, a complete work without residual tillage can be performed. Since the support shaft pin 26 is slightly tilted from the horizontal and the left and right frames 4 and 5 are slanted rearwardly developed, the movement of the center of gravity in the front-rear direction is minimized and at the power side (tractor). Interference can be avoided. Further, since the left and right working parts 6 and 7 are formed so as to be located inward of both side ends (B) of the central working part 3 when unfolded obliquely rearward, the machine width when folded is the central working part 3. Is determined by the width W, the reduction of the entire body is enabled, and the dead space during storage is reduced. Further, since the fixing device 76 is provided between the main frame 2 and the left and right frames 4 and 5, the working positions in which the working parts 3, 6 and 7 are aligned in a straight line can be reliably maintained.

Further, in the fixing device 76 of this embodiment, the frames 2, 4 and 5 are fastened to each other by the pulling rod 84 and the hook 81 at two positions separated in the front-rear direction, and the fastening is released by the operation of the lever member 79. Since it is possible, the working posture can be firmly fixed and the folding posture can be easily switched.

In this embodiment, the transmission 8 is provided on the left side and the rotational driving force is transmitted through the left connecting rod 46, but the transmission may be provided on the right side. Of course it doesn't matter. Further, although the present embodiment has been described in the case of being applied to a halo, the present invention is widely applied to an agricultural working machine having a similar structure, for example, a tiller.

[0027]

In summary, according to the present invention, the following excellent effects are exhibited.

(1) According to the structure described in claim 1, the movement of the center of gravity at the time of folding is reduced, and it is possible to prevent deterioration in maneuverability and stability.

(2) According to the second aspect of the invention, the non-working portion of the entire machine width is limited to one side end, and complete work without residual plowing can be achieved.

(3) According to the third aspect of the invention, the left and right working parts are deployed obliquely rearward, whereby excessive movement of the center of gravity in the front-rear direction and interference with the front power side can be avoided.

(4) According to the structure of claim 4, the width of the machine when folded is determined by the width of the central working unit, and the machine width can be effectively reduced.

(5) According to the configuration of claim 5, it is possible to reliably maintain the posture in which the respective working parts are aligned in a straight line.

[Brief description of drawings]

FIG. 1 is a rear view showing an embodiment of an agricultural working machine according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a partial cross-sectional view for explaining the rotary drive system of FIG.

FIG. 4 is a detailed view of a main part of FIG.

5 is a plan view showing the fixing device of FIG. 1. FIG.

FIG. 6 is a side sectional view for explaining an essential part of FIG.

FIG. 7 is a rear view showing a conventional agricultural working machine.

[Explanation of Codes] 3 Central Working Machine 4 Left Frame 5 Right Frame 6 Left Working Section 7 Right Working Section 8 Transmission Device (Transmission Mechanism) 26 Spindle Pin (Pivot) 40 Central Working Axis 70 Left Working Axis 75 Right Working Axis 76 Fixing device 122 Second clutch mechanism (clutch mechanism) B Axis that is vertically raised from both ends of the central working unit

Claims (5)

[Claims] 1. In an agricultural working machine in which left and right working parts are provided on both sides of the central working part in the machine width direction so as to be rotatable about a pivot, the pivot is located closer to the center than both ends of the central working part. Agricultural work machine characterized by. 2. The work units each have a clutch mechanism for appropriately connecting the work shafts to each other, and a transmission mechanism for transmitting power to the work shafts is provided only at one end of the machine body.
Agricultural work machine described. 3. The agricultural working machine according to claim 1, wherein the pivot is formed to be slightly inclined with respect to the horizontal so as to deploy the left and right working parts obliquely rearward. 4. The agricultural work machine according to claim 3, wherein the left and right working parts are formed so as to be located inward of both side ends of the central working part when the work parts are obliquely rearwardly deployed. 5. Between the central working unit and the left and right working units,
The agricultural working machine according to any one of claims 1 to 4, further comprising a fixing device for fixing these working units in a posture in which they are aligned in the machine width direction.