JP3599453B2 - Tail wheel mounting device for rotary tilling work machine - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tail wheel device of a rotary tilling work machine mounted on a walking tractor (tilling machine, tiller, management machine, etc.).
[0002]
[Prior art]
In a rotary tilling work machine mounted on a walking tractor, a tail wheel (caster wheel) is attached to the rear tail of the working machine frame via a lifting support device, and the vertical position of the tail wheel is adjusted by the lifting support device. It is configured to set the plowing depth. Therefore, in general, the overall length of a walking tractor equipped with a rotary tilling work machine is shortened, and the toe spacing of an operator who walks behind the body by gripping a steering handle is wide. In order to ensure this, the tail wheel is arranged as close to the front as possible, and the range of right and left rotation of the tail wheel shifted forward is regulated by a stopper so as not to interfere with the rotary shaft.
[0003]
[Problems to be solved by the invention]
According to the rotary tilling work machine provided with the tail wheel as described above, the front-rear length of the walking tractor as a whole is shortened, and the toe interval of the operator is widely secured. And even though the tilling can be finished well, even if the cultivation soil adheres and accumulates on the working machine frames, it becomes an operation that lifts the steering handle and lifts the rotary tilling work machine to the ground when changing directions. A lot of labor is required. Therefore, if the operator is a weak elderly person or a woman, it is necessary to change the direction of the aircraft by moving the aircraft backward while keeping the rotary tilling work machine in contact with the ground instead of ascending the ground. Although it is unavoidable, in the prior art, as described above, since the range of right and left rotation of the caster tail wheel is restricted in order to avoid interference with the rotating rotary, the tail wheel moves backward. if you can not turning in the direction to follow the aircraft to, redirection of the aircraft is not performed well, the tail wheel of the non-follow-up is interfere with the reverse travel of the aircraft, a problem that was said to be a fact that would troll the plowing site is Occur .
[0004]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in an ordinary case, the overall length of a walking type tractor is shortened, and the operator is advantageously and finished in a posture in which a wide interval between the toes of an operator is ensured. Rotary tilling work that can be tilled well, and when necessary, can be changed to a position where the direction change can be performed with less labor burden by moving the body backward while the rotary tilling work machine is grounded. A tail wheel mounting device for a machine is provided.
[0005]
[Means for Solving the Problems]
And in order to achieve the above object, the tail wheel mounting device of the rotary tillage working machine according to the present invention,
The tail wheel support device (4), which holds the tail wheel (15) rotatably around the vertical axis (Y) and vertically movable along the vertical axis (Y), is mounted on the working machine frame (2). The tail wheel (15) is fitted to and fixed to the holding cylinder (3) mounted on the rear part so that the vertical position can be adjusted freely, so that the tail wheel (15) can be rotated left and right within a range that does not interfere with the rotary rotary (5). In the tail wheel mounting device of the rotary tilling work machine (R), the tail wheel support device ( 4 ) is detachably fitted to the holding cylinder (3) of the working machine frame ( 2 ) from which the tail wheel support device ( 4 ) is removed. An extension holder (21) having a second holding cylinder (22) is attached to the rear end of an arm (25) extending backward from the mounting body (24), and the tail wheel support is attached to the second holding cylinder (22). The rear wheel (15) supported by the rear wheel support device (4) is rotated 360 degrees around the vertical axis ( Y ) without interfering with the rotating rotary ( 5 ). change to be state, the rotation Russia - Tali (5) of the ground state or Characterized in that in the to be reverse steering.
[0006]
Function and effect of the present invention
Since the device of the present invention is configured as described above, by directly mounting the tail wheel support device on the holding cylinder provided in the working machine frame, the front-rear length of the entire walking tractor is reduced, An extension holder that can be cultivated with good workability and a good finish, and that can be removably attached to the holding cylinder of the working machine frame as required, with a posture in which the toe spacing of the operator is widely ensured. The tail wheel support device is attached to the second holding cylinder at the rear end of the rotary tilling work machine through the rear, so that the body can be moved backward while the rotary tilling work machine is in contact with the ground to reduce the labor burden. Can be.
[0007]
【Example】
Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway side view of a rotary tilling work machine in which the apparatus of the present invention is implemented, and FIG. FIG. 3 is a partial view cut along line AA and viewed in the direction of the arrow, FIG. 3 is a partial view showing part B of FIG. 1 enlarged and partially cut, and FIG. 4 is a view cut along line CC of FIG. 5, FIG. 5 is a side view showing another mode of use of the apparatus of the present invention, FIG. 6 is a side view showing another mode of use of the apparatus of the present invention, and FIG. 7 is a part of FIG. It is the fragmentary view cut | disconnected by the -D line and seen in the arrow direction.
[0008]
In FIG. 1, a rotary tilling work machine (R) includes a tilling transmission case (1) detachably connected to a walking tractor (not shown) and a rear side from the tilling transmission case (1). And a tail wheel support device (4) that is fitted and fixed to a holding cylinder (3) provided at the rear end of the machine frame (2) so as to be vertically adjustable. ing.
[0009]
At the lower end of the tilling transmission case (1), a horizontally-rotating rotary rotary (5) is provided, and the rotary rotary (5) is moved from the walking tractor to the tilling transmission case (1). It is designed to be rotationally driven by the power transmitted through the internal transmission mechanism. The illustrated rotary rotary (5) includes a cultivating claw shaft cylinder (5a) rotating clockwise in FIG. 1 and a cultivating claw shaft cylinder (5b) rotating counterclockwise in FIG. The tilling claw (6) attached to (5a) rotates up-cut, and the tilling claw (7) attached to the cultivating claw shaft tube (5b) rotates down-cut, and the two tilling claws (6) and (7) cooperate. Tilling to a predetermined plowing width.
[0010]
The machine frame (2) comprises a beam (8) having a front end fixed to a rear upper portion of a tilling transmission case (1) and extending rearward, and a beam (8) extending from the beam (8). A tilling cover (9) provided with a top plate extending in the form of a wing spread to the left and right and left and right side plates vertically hanging from left and right ends of the top plate, and a rear end of the top of the tilling cover (9). Is provided with a tillage scattering prevention plate (10) made of an elastic material such as rubber so as to be able to be rolled up and held.
[0011]
The holding cylinder (3) is integrally attached to the rear end of the beam (8) of the machine frame (2) in front of the cultivated soil scattering prevention plate (10). 2), as shown in FIG. 2, a front side of the polygonal cylindrical portion (3a) has a rectangular shape in plan view (see FIG. 2), and has a wide upper portion and a lower portion in side view (see FIG. 1). The sheath (3b) for mounting the ridger is integrally formed by bulging forward to form a trapezoid.
[0012]
The tail wheel support device (4) inserted into the holding cylinder (3) has an outer cylinder (11) similar in shape to the polygonal portion (3a) of the holding cylinder (3), and an up-and-down movement on the outer cylinder (11). An inner cylinder (12) inserted movably and non-rotatably, and a tail wheel support shaft (13) provided at the lower end of the inner cylinder (12) so as to be rotatable around a vertical axis (Y). The tail wheel (15) is idlely supported by a tail wheel support arm (14) connected to the tail wheel support shaft (13) at a caster angle (a).
[0013]
Then, the outer cylinder (11) is inserted into the polygonal portion (3a) of the holding cylinder (3), and is slid in the vertical direction to adjust the height to a desired height, and is fixed to the holding cylinder (3). The tail wheel (15) is tightened and fixed at an arbitrary height by bolts (16), and the vertical position of the tail wheel (15) is rotated by turning the upper rotating handle (17) to the left or right. The cylinder (12) can be changed and adjusted by sliding up and down with respect to the outer cylinder (11).
[0014]
As shown in FIGS. 3 and 4, a tail wheel (14) is provided between the lower end of the inner cylinder (12) and the tail wheel support arm (14) or the tail wheel support shaft (13). A stopper mechanism is provided for switching between a state in which the tail wheel (15) can rotate 360 degrees around the vertical axis (Y) and a state in which the tail wheel (15) can rotate only within a set range.
[0015]
More specifically, an engagement pin (19) is provided on a vertically oriented support cylinder (18) attached to the inner cylinder (12) so as to be vertically movable and fixed, and the engagement pin (19) is attached to a tail wheel support arm. It is configured so that it can be changed and maintained between a lowered position where it comes into contact with the regulating body (20) provided on the (14) side and a raised position where it does not come into contact with the regulating body (20). Thus, when the tail wheel supporting device (4) is fitted to the holding cylinder (3), the engaging pin (19) is lowered to a position where it comes into contact with the regulating body (20), and the engaging pin (19) is lowered. ) And the restricting body (20) make the tail wheel (5) turn left and right within a range that does not interfere with the rotary rotary (5).
[0016]
On the other hand, as shown in FIG. 5, an extension holder (21) is attached to the holding cylinder (3) from which the tail wheel supporting device (4) has been removed, and a second holding cylinder of the extension holder (21) is provided. In (22), the tail wheel support device (4) is replaced and mounted so that it can be adjusted and maintained at an arbitrary height position by the fastening fixture (23). The extension holder (21) is provided with an arm (25) extended from a mounting body (24) inserted into the polygonal portion (3a) of the holding cylinder (3) and fastened with a fixing bolt (16). At the rear end, a second holding cylinder (22) sharing the holding cylinder (3) is fixedly mounted. When the tail wheel supporting device (4) is fitted to the second holding cylinder (22) of the extension holding tool (21), the engaging pin (19) of the stopper mechanism is connected to the regulating body (20). The tail wheel (15) is changed to a state in which the tail wheel (15) can be rotated 360 degrees around the vertical axis (Y) while being lifted and maintained at a position where it does not abut.
[0017]
Further, in a posture in which the tail wheel supporting device (4) is mounted on the second holding cylinder (22) of the extension holding tool (21), as shown in FIGS. The mounting arm (27) of the ridger (26) is inserted into the sheath (3b) for mounting the erection from below, and is fixed together with the mounting body (24) of the extension holder (21) with the fixing bolt (16). The erecting device (26) can be fixed and fastened by fastening, and when the mounting arm (27) is inserted into the sheath portion (3b), a part of the mounting arm (27) is extended. ) Is inserted into the notch groove (28) formed in the front part of the mounting body (24) so that the mounting body (24) can be mounted in such a manner that no lateral run-out or dropout occurs.
[0018]
As described above, when the tail wheel support device (4) is mounted on the second holding cylinder (22) at the rear end of the extension holding tool (21), and the ridger (26) is mounted together in that state. In this case, the tail wheel (15) supported by the tail wheel supporting device (4) may be rotated left and right within a set range, and the ridge stand (26) itself is provided with a gauge wheel. In this case, the tail wheel (15) may be removed by an action such as removing the inner cylinder (12) from the outer cylinder (11) of the tail wheel supporting device (4).
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a rotary tilling part in which the device of the present invention is implemented.
FIG. 2 is a partial view of FIG. 1 cut along line AA and viewed in the direction of the arrow.
FIG. 3 is an enlarged partial view of a portion B of FIG. 1;
FIG. 4 is a cross-sectional view of FIG. 3 taken along line CC and viewed in the direction of the arrow.
FIG. 5 is a side view showing another use mode of the device of the present invention.
FIG. 6 is a side view showing another mode of use of the device of the present invention.
FIG. 7 is a partial view of FIG. 6 cut along line DD and viewed in the direction of the arrow.
[Explanation of symbols]
2 Work machine frame 3 Holding cylinder 3a Polygonal cylinder part 3b Sheath part for mounting ridge 4 Tail support device 5 Rotary rotary 12 Inner cylinder 13 Tail support shaft 14 Tail support arm 15 Tail 19 Engagement Pin 20 Restrictor 21 Extension Holder 22 Second Holder 24 Mounting Body 25 Arm 26 Ridge 27 Mounting Arm R Rotary Tilling Work Machine Y Vertical Center

Claims (1)

The tail wheel support device (4), which holds the tail wheel (15) rotatably around the vertical axis (Y) and vertically movable along the vertical axis (Y), is mounted on the working machine frame (2). The tail wheel (15) is fitted to and fixed to the holding cylinder (3) mounted on the rear part so that the vertical position can be adjusted freely, so that the tail wheel (15) can be rotated left and right within a range that does not interfere with the rotary rotary (5). In the tail wheel mounting device of the rotary tilling work machine (R), the tail wheel support device ( 4 ) is detachably fitted to the holding cylinder (3) of the working machine frame ( 2 ) from which the tail wheel support device ( 4 ) is removed. An extension holder (21) having a second holding cylinder (22) is attached to the rear end of an arm (25) extending backward from the mounting body (24), and the tail wheel support is attached to the second holding cylinder (22). The rear wheel (15) supported by the rear wheel support device (4) is rotated 360 degrees around the vertical axis ( Y ) without interfering with the rotating rotary ( 5 ). change to be state, the rotation Russia - Tali (5) of the ground state or Tail wheel mounting apparatus Tali tilling machine - in Russia, characterized in that to be able to reverse steering.

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