JP2001171305A - Tread adjusting device for movable agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the treads of right and left driving wheels 9 and 10 without using a special driving member. SOLUTION: The treads can be adjusted by utilizing the driving force of the wheels 9 and 10.

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 for digging root crops such as onions and carrots from a field.

[0002]

Generally, in a harvester that performs harvesting while traveling across a ridge, it is necessary to adjust the tread of the left and right drive wheels according to the ridge width.
If this is performed using a driving member such as a special cylinder, there is a problem in that the cost is disadvantageous.

[0003]

SUMMARY OF THE INVENTION The present invention is directed to a tread adjusting device for a mobile agricultural machine that supports drive wheels on a transmission case extending left and right from a transmission case. The drive shaft to be inserted is telescopic, and the transmission case and the drive shaft are extended and contracted by the power converted from the rotational motion of the drive shaft to linear motion by a screw mechanism. The tread can be adjusted by using the driving force of the driving wheels without using any members, so that an increase in cost can be suppressed, and downsizing can be easily achieved. In addition, by providing a brake mechanism at the end of the screw shaft that transmits the rotational movement of the drive shaft relative to the screw mechanism, overload can be absorbed by the brake mechanism. It is easy and easy to maintain.

[0004]

Embodiments of the present invention will be described below with reference to the drawings. 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 transmission system diagram, FIG. 5, FIG. 6, and FIG. ) And the working part (2) to form a walking type structure. The self-propelled vehicle (1) has a transmission case (4) in which an engine (3) and a transmission mechanism interlocked with an output section thereof are installed.
Transmission cases (5) and (6) extending left and right from the transmission case (4); left and right final cases (7) and (8) connected to the transmission cases (5) and (6); Drive wheels (9) and (10), which are supported by the cases (7) and (8) via axles (9a) and (10a), an engine (3), a transmission case (4), and a working unit drive case (4a). Airframe (11) to be integrally attached to the rear
A gauge wheel (12) arranged on the front extension line of one of the drive wheels (9) to be adjustable on the frame (11) and a steering handle (13) extending rearward and upward from the frame (11). It is composed of

As shown in FIGS. 2 and 3, the right final case (8) and the right driving wheel (10) are larger than the left final case (7) and the driving wheel (9). By offsetting to the right side,
Both drive wheels (9) and (10) are formed so as to be able to move between the valleys on both sides of the ridge (14). A transmission case (6) for supporting one final case (8) and a driving wheel (10) and a transmission mechanism built therein, and left and right final cases (7) and (8) at both ends are provided with arms (7).
0) (71) and the body frame (1
1) The rear horizontal connecting pipe (72) is made telescopic so that the right final case (8) and the right driving wheel (10) are moved in the axle direction by the electric cylinder (15), and the left and right wheels (9) are moved. (10) The interval (tread) is changed, the position of the drive wheel (10) is adjusted according to the difference in the width of the ridge (14), and the vehicle runs across the ridge (14).

[0006] Further, a working part (2) is constructed by assembling various components on the body frame (11), and the working part (2) is a pull-out conveying member that is inclined to the front low and rear high. A transfer device (18) consisting of (16) and a lower transfer device (17) provided below the pull-out transfer member (16) and provided at a smaller inclination angle than the pull-out transfer member (16); Root crops such as onions that are planted in rows (1
9) A digging device (20) for digging a group, and a cutting device (21) disposed below the pull-out and conveying member (16) in the middle of the transfer of the lower conveying device (17). A work unit (2) for harvesting a root crop (19) is configured.

[0007] The pulling-out conveying member (16) is formed by extending soft elastic endless belts (23) (23) juxtaposed on the left and right sides, and is formed between the conveying endless bands (23) (23). The root-crop crop (19) is configured to be clamped and transported to the tip-and-leaf portion (19a) of the root crop (19) in the transport route. At the end of transfer of the left pull-out conveying member (16), as shown in FIG. 2, a foliage releasing device (24) bent leftward and laterally in a plan view is provided. Is released to the upper surface of the ridge (14), whereas the cut and separated foliage (19a) is released to the valley on the left side of the ridge (14).

An endless belt (25) provided with elastic conveyance protrusions (25a) 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 direction of travel of the vine, a vertical rotation type weed raising member (27) for separating the foliage (19a) of a plurality of rows of root crops (19) planted on the ridge (14) into right and left is mounted. In addition, the lower part of each weed raising member (27) is advanced by piercing the tip side into the underground portion between the root crops (19) in each row, and cutting off the root crops (19). A vertical root cutting rod (52) for vertically dividing the soil is provided, and further below the transport start end of the pull-out transport member (16), between the vertical turning type grass raising members (27). Root crops introduced (1
A digging device (20) that travels while digging an appropriate portion below the underground portion of 9) is provided, and the digging device (20) is provided.
Is a pair of left and right vibrating blades (28) having an L shape in a front view.
(28) is provided.

On the other hand, as shown in FIG. 8, the lower transport device (17) is a pair of left and right soft elastic transport endless belts (29), (29).
Root crops (19) according to the clamping transport path formed by
The transfer end of the lower transfer device (17) faces above the transfer intermediate portion of the discharge conveyor (30), and is transferred to the lower transfer device (17). ) The crop (19) suspended below is received on the upper surface of the discharge conveyor (30), and the lower transport device (1) is received.
7) The neck (19b) of the crop (19) is tilted to the left by the tipping foil (31) and the tipping guide (32) at the end of the transfer, and the recess (30a) formed on one side of the discharge conveyor (30). ) With the spherical portion of the crop (19) inserted therein, the crop (19) is supported in a posture of leaning leftward, and the crop (19) is dropped on the upper surface of the ridge (14) in the posture of leaning left. .

A neck (19b) is clamped by the lower transport device (17) at a position above the lower transport device (17) and below the pull-out transport member (16), and is pulled by the pull-out transport member (16). A cutting device (2) driven by an electric motor (21a) for separating the foliage (19a) of the root crop (19) holding the foliage (19a).
1) is provided, and the cutting device (21) may have a structure for driving a rotary blade as shown in the figure, or may be a driven cutting blade such as a reciprocating blade.

[0011] Of the components of the working section (2) composed as described above, those driven by power, ie, the pull-out transport member (16) of the transport device (18), the lower transport device (17) and FIG. 4 shows a raking member (26) (26), a vertical rotation type weed raising member (27), a digging device (20), etc., which are provided in front of the transfer device (18). The work output shaft (34) extending forward from the transmission case (4) via the clutch (33) through the transmission tube (35) in the front-rear direction is driven by such a transmission structure. It is inserted into the unit drive case (4a) and is interlockingly connected to the drive shaft (36) inserted in the working 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) projects 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) connected to the rear ends respectively are provided.
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.
The fulcrum shaft (45) is attached to the frame (11), and the upper part and the lower part of the fulcrum shaft (45) swing back and forth in opposite directions.

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).

As is apparent from FIG. 9, a hollow pipe-shaped slide receiving portion (80) (81) is formed from the right end of the left transmission case (6) and the right end of the rear horizontal connecting pipe (72).
Are integrally extended to the right side of the fuselage on the same axis, and a hollow pipe-shaped slide portion (8) is
2) The (83) is fitted so that it can be freely inserted and removed, and the right final case (8) is attached to the right end of each of the slide portions (82) and (83).
The right transmission case (6) and the rear horizontal connecting pipe (72) are expanded and contracted by the slide portions (82) and (83) entering and exiting from the slide receiving portions (80) and (81). The final case (8) and the drive wheels (10) can be moved in the axle direction, that is, the tread can be adjusted.

As shown in FIG. 10, the above-mentioned tread adjustment is performed using the driving force of the left driving wheel (10).
The drive shaft (8) inserted into the left and right transmission cases (5) and (6)
The left axle (9a) is interlocked to the left end of 4) via a chain transmission mechanism (85) built in the left final case (7), and is connected to the drive wheel (9) on the left side of the transmission case (4). A double-structured hollow telescopic transmission shaft (86) capable of transmitting power and transmitting rotation while allowing sliding in the axial direction to the slide receiving portion (80) and the sliding portion (82).
And the left end of the inner shaft (86a) of the telescopic transmission shaft (86) is operatively connected to the right end of the drive shaft (84), and the right final case is attached to the right end of the outer shaft (86b) of the telescopic transmission shaft (86). The right wheel (10) is interlocked and connected via a chain transmission mechanism (87) built in (8) to transmit power to the right driving wheel (9) from the transmission case (4). A screw mechanism (88) for converting rotation of the shaft (86) into linear motion is provided in the hollow of the transmission shaft (86), and the screw mechanism (88) is a female screw formed on the inner surface of the right end of the inner shaft (86a). (89) and a male screw shaft (91) having an outer surface formed with a male screw (90) inserted into the outer shaft (86b) and screwed to the female screw (89).
0) is passed through the outer shaft (86b) and connected to the brake drum (93) of the brake mechanism (92) formed outside the right final case (8), and the brake mechanism (92)
Is turned on and locked to the final case (8) on the right side of the male screw shaft (91), the screw mechanism (88) is operated, and the rotation of the telescopic transmission shaft (86) is converted into linear motion to convert the rotation of the right final case (8). 8) to adjust the tread.

By switching the rotation direction of the transmission shaft (84), it is possible to switch between expansion and contraction of the tread.
A screw mechanism (88), that is, a tread extension device can be formed in the telescopic transmission shaft (86), so that it is compact. When an overload is applied, the load is released by slipping in the brake mechanism (92), so that the transmission mechanism has Damage can be prevented, each component can be made smaller, and by adjusting the brake, the push-pull force and speed of the left final case (8) can be adjusted. It is.

[0019]

As is apparent from the above embodiments, the present invention relates to a mobile agricultural machine in which drive wheels (9) and (10) are supported on transmission cases (5) and (6) extending right and left from a transmission case (4). In at least one of the tread adjusting devices, at least one of the transmission case (6) and the drive shaft (84) inserted into the transmission case (6) have an extendable structure, and the rotational movement of the drive shaft (84) is controlled by a screw mechanism. With the power converted to linear motion, the transmission case (6) and the drive shaft (8)
4) is configured to expand and contract, and the drive wheels (9) (1) can be used without using a drive member such as a special cylinder.
The tread can be adjusted by using the driving force of 0), the increase in cost can be suppressed, and the compactness can be easily achieved. In addition, a brake mechanism (92) for transmitting the rotational movement of the drive shaft (84) relative to the screw mechanism (88) so as to be able to be cut off is provided.
Since the overload can be absorbed by the brake mechanism (92) by being provided at the end of 1), it is easy to replace against abrasion and the like, and excellent in maintainability.

[Brief description of the drawings]

FIG. 1 is an overall left 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 an explanatory diagram of a working state.

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 transfer device.

FIG. 9 is a plan view of a drive wheel unit.

FIG. 10 is an explanatory view of tread adjustment.

FIG. 11 is an overall schematic front view.

FIG. 12 is a rear view of the same.

FIG. 13 is a left side view of the same.

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

FIG. 15 is a plan view of the same.

FIG. 16 is a bottom view of the same.

[Explanation of symbols]

 (4) Transmission case (5) (6) Transmission case (9) (10) Drive wheel (84) Drive shaft (88) Screw mechanism

Claims (10)

[Claims] 1. A tread adjusting device for a mobile agricultural machine, comprising: a screw mechanism for converting a rotational motion of a transmission shaft for transmitting power to a driving wheel into a linear motion to expand and contract the transmission shaft. 2. A tread adjustment system for a mobile agricultural machine, comprising: a screw mechanism for converting a rotary motion of a transmission shaft for transmitting power to driving wheels into a linear motion to expand and contract a transmission case for inserting the transmission shaft. apparatus. 3. A screw mechanism for converting rotation of a transmission shaft for transmitting power to driving wheels into linear motion to extend and retract the transmission shaft and a transmission case in which the transmission shaft is inserted. Tread adjustment device for mobile farm machine. 4. The method according to claim 1, wherein the tread is switched between enlargement and contraction by switching the rotation direction of the transmission shaft.
The tread adjusting device of the mobile agricultural machine according to the above. 5. The transmission shaft is a hollow telescopic transmission shaft having a double structure that transmits rotation while allowing sliding in the axial direction, and comprises an inner shaft connected to a drive shaft and an outer shaft connected to wheels. Item 5. The tread adjusting device for a mobile agricultural machine according to item 1, 2, 3, or 4. 6. A screw mechanism provided in a hollow of a transmission shaft, comprising: a female screw formed on an inner shaft; and a male screw shaft formed on an outer surface of a male screw inserted into an outer shaft and screwed to the female screw. The tread adjusting device for a mobile agricultural machine according to claim 5, wherein the screw mechanism is operated by locking the male screw shaft by a brake mechanism. 7. The tread according to claim 6, wherein the brake mechanism is configured as a final case connected to a transmission case into which the transmission shaft is inserted, and a male screw shaft connected to the brake drum is locked to the final case. Adjustment device. 8. A transmission case including left and right transmission cases extending left and right from a transmission case, left and right final cases connected to each transmission case, and left and right drive wheels pivotally supported via an axle in each final case. In the tread adjusting device of the mobile agricultural machine, a hollow pipe-shaped slide receiving portion is integrally extended from one end side of the transmission case to one machine body on the same axis,
A hollow pipe-shaped slide part is fitted to this slide receiving part so as to be able to freely move in and out, a final case is connected to one end of this slide part, and the slide receiving part and the slide part are allowed to slide in the axial direction and rotate. The hollow telescopic transmission shaft is inserted with a double structure to transmit, and one end of the drive shaft inserted into the transmission case is connected to one end of the inner shaft of the telescopic transmission shaft, and one end of the outer shaft of the telescopic transmission shaft is connected to the final case. The drive wheels are connected via a built-in transmission mechanism, and at least one of the transmission cases and a transmission shaft inserted into the transmission case are made to have a telescopic structure, and the rotation of the shaft is linearly moved into the hollow of the telescopic transmission shaft. A screw mechanism for converting the internal thread into one end of the inner shaft, and a male screw shaft that is inserted into the outer shaft and formed on the outer surface with a male screw inserted into the outer shaft and screwed to the female screw. , This male screw shaft The outer shaft is penetrated by connecting the brake drum of the brake mechanism constituting the final case,
By locking the male screw shaft to the final case by the brake mechanism, the rotational motion of the transmission shaft is converted into linear motion and given to the final case, and at least one of the transmission cases and the transmission shaft inserted in the transmission case are expanded and contracted. Tread adjustment device for mobile farm machine. 9. The left and right final cases are connected by a rear horizontal connecting pipe of the body frame, and a hollow pipe-shaped slide receiving portion is integrally extended from one end of the rear horizontal connecting pipe to one side of the body on the same axis. A hollow pipe-shaped slide portion is fitted to the slide receiving portion so as to be able to freely enter and exit, a final case is connected to one end of the slide portion, and the rear lateral connection pipe is configured to be expandable and contractable. 9. The tread adjusting device for a mobile agricultural machine according to claim 8, wherein the transmission shaft and the rear horizontal connecting pipe inserted into the transmission case are expanded and contracted. 10. A gauge wheel is disposed in front of one of the drive wheels, and a transmission case opposite to the gauge wheel and a transmission shaft inserted in the transmission case are extended and contracted.
A tread adjusting device for a mobile agricultural machine as described in the above.