JPH09263104A - Tread adjusting device of mobil agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust the treads of right and left wheels with the wheels grounded, with small force. SOLUTION: In a harvester wherein at least either a right final case (8) or a left final case (8) pivotally supporting a wheel (10) can be supported slidably in the direction of an axle by two shafts which are parallel with each other, a pushing and drawing member is provided to push and draw a final case 8 in the direction of the axle, and a point A, on which force to push and draw the final case (8) work, is provided inside the triangle (87) formed by connecting the points of two connecting shafts and the wheel (10) contacting the ground. The two connecting shafts is supported by a plurality of steel balls spacedly arranged with equal interval in the circumferential surface of the shafts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tread adjusting technique for a mobile agricultural machine such as a harvester that digs root crops such as onions and carrots from a field.

[0002]

Generally, in a harvester that performs harvesting work while traveling across ridges, the treads of the left and right drive wheels are long, and when the width of the aircraft in the working state is wide, it is harvested on the bed of a light truck. In many cases, it is not possible to carry the equipment on board. Therefore, it is necessary to shorten the tread of the left and right drive wheels and reduce the lateral width of the machine so that the harvester can be placed on the bed of a light truck, but unless a special stand device for supporting the machine is provided, work will be performed. Adjusting the tread from the tread and vice versa is done with the wheels connected, so even if the harvester is small, it will be a very difficult task manually.

[0003]

SUMMARY OF THE INVENTION However, according to the present invention, at least one of the left and right final cases that pivotally support the wheels is slidable in the axial direction, and the tread adjustable harvester is supported by two parallel axes. The push-pull member for pushing and pulling the final case in the axial direction is provided, and the push-pull action point of the final case is provided inside the triangle connecting the contact points between the two connecting shafts and the ground of the wheel. By mechanically adjusting the treads of the wheels, the treads of the left and right wheels can be easily adjusted to any position, and the push / pull action points of push / pull members such as cylinders for electrical, hydraulic, pneumatic, etc. By providing the inside of the triangle, the pushing / pulling force of the pushing / pulling member is less likely to act as a bending force that does not follow the axle direction. Was carried out to obtain, obtain using the small and-out inexpensive push-pull member, it is capable retaining a cost increase.

Further, the two connecting shafts are held by a plurality of steel balls arranged at equal intervals on the circumference of the shaft, and the connecting shafts are slidably supported by points (lines) instead of by planes. The slide resistance can be kept small, and in this respect as well, the push-pull force for tread adjustment can be made small.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 is an overall side view, FIG. 2 is the same plan view, FIG. 3 is the same front view, FIG. 4 is a transmission system diagram, and FIGS. 5, 6 and 7 are work state explanatory views. ) And the working part (2) to form a walking type structure. The self-propelled vehicle (1) includes a transmission case (4) having an engine (3) and a transmission mechanism interlocking with an output section thereof.
And transmission cases (5) and (6) extending left and right from the mission case (4), left and right final cases (7) and (8) connected to the transmission cases (5) and (6), and finals The drive wheels (9) and (10) pivotally supported on the cases (7) and (8) via the axles (9a) and (10a), the engine (3), the mission case (4), and the working unit drive case (4a). Airframe frame (11) to be integrally attached to the rear part
And a gauge wheel (12) arranged on the front extension line of one of the drive wheels (9) and attached to the frame (11) so as to be adjustable up and down, and a steering handle (13) extending rearward and upward from the frame (11). Etc.

Also, the right final case (8) and the right drive wheel (10) are larger than the left final case (7) and the drive wheel (9) as shown in FIGS. 2 and 3. By providing it to the right side,
Both drive wheels (9) (10) are formed so as to be able to move over the valleys on both sides of the ridge (14). Further, the transmission case (6) supporting one of the final case (8) and the drive wheel (10), the transmission mechanism incorporated therein, and the left and right final cases (7) and (8) at both ends of the arm (7).
0) (71) connected to the aircraft frame (1
1) The rear horizontal connecting pipe (72) has a retractable structure, and the electric cylinder (15) moves the right final case (8) and the right drive wheel (10) in the axial direction to set the left and right wheels (9). (10) Change the interval (tread), adjust the tread according to the difference in the ridge (14) width,
The tread is configured to run across the ridges (14), and the tread is adjusted to have a lateral width of the body capable of mounting the harvester on the carrier of a light truck.

Further, the working unit (2) is constructed by assembling various constituent elements to the machine body frame (11), and the working unit (2) is a pulling and conveying member tilted forward and backward and high. A transfer device (18) consisting of (16) and a lower transfer device (17) provided below the pull-out transfer member (16) at a slanting angle less than that of the pull-out transfer member (16); and a ridge (14). Root crops such as onions planted in rows (1
9) A digging device (20) for digging out the group, and a cutting device (21) arranged below the pulling and conveying member (16) in the middle of the transfer of the lower conveying device (17). A working unit (2) for harvesting root crops (19) is configured.

The pull-out conveying member (16) is formed between both conveying endless belts (23) and (23) by stretching the soft elastic conveying endless belts (23) and (23) juxtaposed to each other. The part near the tip of the foliage part (19a) of the root crop (19) is held and transferred to the holding and transferring route. Further, as shown in FIG. 2, a foliage discharging device (24) bent and formed laterally to the left side in a plan view is provided at the transfer end portion of the left pulling and conveying member (16), and a root crop (19) is provided. Is released to the upper surface of the ridge (14), while the cut and separated foliage (19a) is released to the valley on the left side of the ridge (14).

An endless belt (25) with elastic conveyance protrusions (25a) is provided on the conveyance start end side of the pull-out conveyance member (16).
(25) A pair of left and right scraping members (26) and (2)
6) is installed, and the raking members (26) (26)
In the front part in the traveling direction of the plant, a vertically-rotating type weeding raising member (27) for separating the left and right stems and leaves (19a) of a plurality of rows of root crops (19) to be planted in the ridge (14) is installed. The root cuttings (19) of the root crops (19) are cut by advancing the tip end side into the ground part between the root crops (19) of each row. A vertical root-cutting bar (52) for vertically dividing the soil and soil is provided, and further, in a lower portion of the transport start end portion of the pull-out transport member (16), between the vertically-rotating type weed raising members (27). Root crops introduced (1
An excavation device (20) is provided for advancing while excavating an appropriately lower part of the underground part of 9), and the excavation device (20) is provided.
Is a pair of left and right vibrating blades L-shaped in front view (28)
(28) is provided.

On the other hand, as shown in FIG. 8, the lower transfer device (17) has a pair of left and right soft elastic transfer endless belts (29) (29).
The root crop (19) according to the holding transfer path formed by
The lower transfer device (17) is configured to be gripped and transferred, and the transfer end part of the lower transfer device (17) is exposed above the transfer intermediate part of the discharge conveyor (30). ) The crop (19) hung on the lower side is received on the upper surface of the discharge conveyor (30) and the lower transfer device (1) is received.
7) The neck portion (19b) of the crop (19) is tilted to the left side by the lateral falling wheel (31) and the lateral guide (32) at the transfer end portion, and the concave portion (30a) is formed on one side on the discharge conveyor (30). ) With the ball portion of the crop (19) in the left side of the crop (19) so that the crop (19) is supported in a posture, and the crop (19) is dropped to the left side on the ridge (14). .

Further, at a portion above the lower transfer device (17) and below the pulling transfer member (16), the neck part (19b) is held by the lower transfer device (17) and the pulling transfer member (16) holds it. Cutting device (2) driven by an electric motor (21a) for cutting off the foliage (19a) of the root crop (19) that is being held by the foliage (19a)
1) is provided, and the cutting device (21) may have a structure for driving a rotary blade as shown in the drawing, or may be a drive type cutting blade such as a reciprocating blade.

Among the constituent elements of the working unit (2) having the above composition, those which are driven by power, that is, the pulling-out conveying member (16) and the lower conveying apparatus (17) of the transfer device (18) and The scraping members (26) (26), the vertical turning type weed raising member (27), the excavation device (20), and the like, which are provided in association with each other at the front of the transfer device (18), are shown in FIG. The work output shaft (34), which is driven by such a transmission structure and extends forward from the transmission case (4) through the clutch (33), passes through the inside of the transmission cylinder (35) in the front-rear direction for work. The drive shaft (36) is inserted into the drive unit drive case (4a) and interlocked with the drive shaft (36) inserted in the drive unit drive case (4a).

An upper transport drive shaft (39) interlockingly connected to the drive shaft (36) via a worm (37) and a worm wheel (38) protrudes upward, and is driven by the upper transport drive shaft (39). Thus, the pair of left and right soft elastic transport endless belts (23) and (23) of the pull-out transport member (16) are each driven to rotate in a predetermined direction, and the scraping member (2) is driven.
6) (26) The soft elastic transport endless belt (23) (2)
3) are commonly driven to rotate by front shafts (40) and (40) each having a loop body around which the lower conveying device (2) is mounted.
9 and 29 are also configured to be rotationally driven by transmission shafts (41) and (41) interlockingly connected to the front shafts (40) and (40).

Further, cranks (42) and (42) are provided at the left and right ends of the drive shaft (36), and the front ends of the pitmen (43) and (43) having their rear ends connected to each other.
The vibrating blades (28) and (28) are connected to the vibrating blades (28) and (28) of the digging device (20) to reciprocate the vibrating blades (28) and (28) in the front-rear direction.
It is attached to the frame (11) by a fulcrum shaft (45), and an upper part and a lower part of the fulcrum shaft (45) oscillate back and forth.

Further, a discharge conveyor (30) is connected to the drive shaft (36) via a bevel gear (46) and the like, and a foliage discharge device (24) is connected to the left endless belt (23). .

Further, a rear end of the raising input shaft (47) extending substantially horizontally in the front-rear direction is connected to a right end of the driving shaft (36) via a bevel gear (48), and three lines for two lines are provided. The right end of the raising drive shaft (49) for driving the raising members (27) is connected via a bevel gear (50) to the front end of the input shaft (47).

Further, as apparent from FIGS. 9 to 11, a connecting shaft which connects the left and right final cases (7) and (8) which respectively support the left and right drive wheels (9) and (10). The transmission case (5) (6) and the rear horizontal connecting pipe (72) are extended in the left and right direction of the rear part of the body so as to form two parallel axes, and the right end side and the rear part of the left transmission case (6) are A hollow pipe-shaped slide receiving portion (80) (81) is integrally extended from the right end side of the horizontal connecting pipe (72) to the right side of the machine body on the same axis, and the slide receiving portion (80) (8)
Hollow pipe-shaped slide shafts (82) and (83) are fitted into and retracted from (1), and the transmission pipes (5) and (6) and the rear horizontal connecting pipe (72) are formed to be expandable and contractible. Then, in the rear horizontal connecting pipe (72) and its slide receiving portion (81), the transmission case (4) and the transmission case (4) via the plurality of connecting plates (84) (85) (86) in the rear portion of the sandpan body frame (11). A connecting plate (87) for integrally connecting the left and right transmission cases (5) (6) and their slide receiving portions (80) and integrally extending from the rear horizontal connection pipe (72) on the left transmission case (6). Through the engine base (3
Left and right transmission cases (5) for connecting a)
(6) and its slide receiving part (80), the rear horizontal connecting pipe (72) and its slide receiving part (81) serve as a fixed side connecting shaft, and each slide shaft (82) (83) is movable side connecting. It becomes an axis. The left final case (7) is connected to the left ends of the two fixed-side connecting shafts, that is, the right end of the left transmission case (5) and the left end of the rear connecting pipe (72). The right final case (8) is connected to the right ends of the connecting shafts (82) (83) of the slide shafts (82) (8), that is, the right ends of the slide shafts (82) (83).
When the slide receiving portions (80) and (81) of (3) are moved in and out, the right final case (8) and the right drive wheel (1)
0) can be moved in the axle direction, that is, the tread can be adjusted. The rear ends of the left and right final cases (7), (8) are connected to the transmission cases (5), (6), and the ends of the left and right transmission cases (5), (6) (the end of the left transmission case is the slide shaft). The left and right drive wheels (9) and (10) are connected to the outside of the front ends of the left and right final cases (7) and (8) via the axles (9a) and (10a). The horizontal connecting pipe (32) is supported by the arms (70) and (71), and the middle portion of the left and right final cases (7) and (8) is connected to the final case (7).
(8) It is supported above. Further, the electric cylinder (1) is a push-pull member that pushes and pulls the right final case (8) and the drive wheel (10) integrally in the axial direction.
5) is an arm (77) fixed by bolts to the outer surface of the connecting plate (75) on the right side of the fuselage connecting the rear connecting pipe (72) and the right transmission case (6) and the right final case (8). ) Between the inner surfaces of each slide receiving portion (80) (8
1) and the slide shafts (82) and (83) are stretched in parallel with each other, and as is clear from FIG. 11, the slide shafts (82) and (83), which are two movable connecting shafts, and the right side. In order to provide a push-pull action point (A) inside a triangle (87) in side view that connects the contact point of the drive wheel (10) with the ground, the tip of the piston rod (15a) of the electric cylinder (85) is connected to the arm ( By connecting to the inner surface of 71), when sliding the airframe in a state of being supported by three fixed points, it can be slid most efficiently at the center of gravity of a triangle connecting the three fixed points or at a position close to it. The necessary ground height can be obtained and the push-pull action point (A) can be provided at a position as close as possible in relation to the upper surface of the ridge (14).

The push-pull action point (A) is the drive wheel (1
0) contact point with the ground and each slide shaft (82) (8
3) A line (L) that connects the point (O) that bisects the line that connects
It is preferable to move it up and down to get the required ground clearance.

Further, as shown in FIGS. 10 and 18, each slide shaft (82) (83) is attached to each slide receiving portion (80).
A ball bearing member (8) fitted inside the left and right ends of (81)
8) is not point-supported but surface-supported, and these ball bearing members (88) are equally spaced (equal division) around the slide shaft (83).
The slide shafts (82) and (83) are slidably supported by the 3 to 8 steel balls (88a) arranged in
0) (81) to support, slide shaft (82)
The sliding resistance of (83) is small, and the pulling force of the right final case (81) and the driving wheel (10) is small.

Further, the right transmission case (6) for driving the left drive wheel by positioning power in the final case (8) on the right side of the transmission case (4), and the slide receiving portion (8)
0), the transmission shaft (89) inserted in the slide shaft (82)
Is a hollow shaft (hexa) having a hexagonal cross section on the mission case (4) side from the right end of the slide receiving part (80) and a hexagonal cross section (slit) is slidably fitted on the hollow shaft (89a) on the final case (8) side. It is composed of a hollow shaft (89a) and has a structure that expands and contracts according to tread adjustment.

Further, as is clear from FIGS. 1 and 2,
The steering wheel (13) has a main transmission lever (40),
PTO clutch lever (91), accelerator lever (9
2), with the left and right brake levers (93),
Auxiliary shift lever (94) on the upper surface of the mission case (4)
On the left side of the steering wheel (13).
2) The height adjusting handle (95) is connected, and the battery (96) is attached to the upper surface of the slide receiving portion (80) of the left transmission case (6).
1) a cutter operation first switch (not shown) for detecting the "ON" position, a cutter operation second switch (not shown) for detecting an engine stop position of the accelerator lever (92), and a forward position of the main speed change lever (90). An electric motor (21a) for driving the cutting device (21) to the battery (96) is provided with a cutter operating third switch (not shown) for detecting, and only when all of the first to third switches are on, that is, during the excavation work. ) Is energized to drive this,
Through turning off one of the third switches, the electric power supply to the electric motor (21a) is stopped, that is, the electric power consumption of the battery (96) is saved and the cutting device (21) is driven during work. It is configured to prevent fear and switching of each part due to it.

[0022]

As is apparent from the above embodiments, according to the present invention, at least one of the left and right final cases (7) and (8) pivotally supporting the wheels (9) and (10) is slidable in the axial direction, and In a harvester with tread adjustment supported by two parallel shafts, a push-pull member (15) for pushing and pulling the final case (8) in the axial direction is provided, and two connecting shafts (6) (72) and wheels are provided. The push-pull action point (A) of the final case (8) is provided inside the triangle (87) connecting the contact point with the ground of (10).
By mechanically adjusting the tread of (10), the treads of the left and right wheels (9) and (10) can be easily adjusted to arbitrary positions, and a push-pull member including a cylinder for electric, hydraulic, pneumatic, etc. By providing the push-pull action point of (15) inside the triangle (87), the push-pull force of the push-pull member (15) is less likely to act as a bending force that does not follow the axle direction. The tread adjustment can be performed by the push-pull force, a small and inexpensive push-pull member (15) can be used, and an increase in cost can be suppressed.

Further, the two connecting shafts (6) and (72) are held by a plurality of steel balls (88a) arranged at equal intervals on the circumference of the shaft so that the connecting shafts (6) and (72) are held. It is possible to support the slide resistance by points (lines) rather than on the surface so that the slide resistance can be suppressed small, and also in this point, the push-pull force for tread adjustment can be reduced.

[Brief description of drawings]

FIG. 1 is an overall side view.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a drive system diagram.

FIG. 5 is a work state explanatory view.

FIG. 6 is an explanatory diagram of a working state.

FIG. 7 is an explanatory view of a working state.

FIG. 8 is a plan view of a lower transport unit.

FIG. 9 is a rear view of the left and right drive wheel portions.

FIG. 10 is a sectional view of a slide portion.

FIG. 11 is a side view of the right drive wheel.

FIG. 12 is a schematic front view of the whole.

FIG. 13 is a rear view of the same.

FIG. 14 is a left side view of the same.

FIG. 15 is a right side view of the same.

FIG. 16 is a plan view of the same.

FIG. 17 is a bottom view of the same.

FIG. 18 is a sectional view of a slide receiving portion.

[Explanation of symbols]

 (5) (6) Transmission case (connecting shaft) (7) (8) Final case (9) (10) Drive wheel (15) Electric cylinder (pushing / pulling member) (72) Rear lateral connecting pipe (connecting shaft) ( 87) Triangle (A) Push-pull action point (88a) Steel ball

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Irie 428 Enami, Okayama City Seirei Industrial Co., Ltd. In-house

Claims (2)

[Claims] 1. At least one of the left and right final cases that pivotally support the wheels is slidable in the axle direction, and
In a tread adjustable harvester supported by two parallel shafts, a push-pull member for pushing and pulling the final case in the axle direction is provided, and inside the triangle connecting the contact points between the two connecting shafts and the ground of the wheel, A tread adjusting device for a mobile agricultural machine, which is provided with a push-pull action point of a final case. 2. The two connecting shafts are held by a plurality of steel balls arranged at equal intervals on the circumference of the shaft.
Tread adjusting device for mobile agricultural machine described.