JP2002308118A - On-the-ground maneuvering device for ride type farming machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-the-ground maneuvering device for a ride type farming machine to allow the operator on the ground to maneuver the running machine body properly. SOLUTION: The maneuvering device includes a lever 26 for maneuvering the farming machine in such a way as capable of being changed over between the rising attitude upright in the front of the running machine body and the falling attitude extended ahead from the front part of the running machine body, and it is arranged so that the machine body stopping operation can be conducted in the condition that the lever 26 is grasped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a riding rice transplanter as an example of a riding agricultural machine to which the present invention is applied. In this riding rice transplanter, a four-row seedling planting apparatus 5 can be moved up and down via a hydraulically driven link mechanism 4 at the rear of a four-wheel drive traveling machine body 3 having a front wheel 1 and a rear wheel 2. It is configured to be connected. As shown in FIG. 1 and FIG.
The engine 6 is mounted on the front of the vehicle, and the output of the engine 6 is transmitted to a transmission case 8 supporting the front wheels 1 by a belt transmission 8.
, And the gears are shifted by the transmission case 7 to drive the front wheels 1. The output taken out of the transmission case 7 is transmitted to the rear transmission case 9 that supports the rear wheel 2.
The work power taken out of the transmission case 7 is transmitted to the seedling planting apparatus 5.

As shown in FIGS. 3 and 4, a pitman arm 1 which is operated to swing left and right around an axis a by a steering handle 10 is provided below a transmission case 7.
1 is provided in a cantilevered forward direction, and a pitman arm 11 is provided.
Of the front wheel 1 and the knuckle arms 12 of the left and right front wheels 1 are operatively connected by tie rods 13 to form a steering link mechanism 14 for the front wheels 1.

As shown in FIGS. 3 and 6, a sprocket 15 as a rotating member is connected to the lower end of the pitman arm 11 coaxially with the axis a. An operation sprocket 16 as an operation member is rotatably provided around an axis b parallel to the axis a, and the sprocket 15 and the operation sprocket 16 are wound and interlocked by a chain 17 as an interlocking member.

[0006] As shown in FIGS. 6 and 7, the operation sprocket 16 is rotatably supported by a fixed boss 19 fixed to the traveling machine body 3, and is spline-fitted to the operation sprocket 16 at the center of the fixed boss 19. Alternatively, the operation shaft 20 fitted with a key is slidably inserted up and down. An upper portion of the operation shaft 20 is supported by a fixed boss 22 via a rotation boss 21, and a rotation bracket 23 extending forward from the rotation boss 21 is connected to be rotatable left and right around the axis b. . A balance arm 24 is supported so as to be vertically rotatable around a horizontal axis c of the rotation bracket 23, and a rear end of the balance arm 24 and the operation shaft 20 are connected by a pin 25, and the axis c of the balance arm 24 is The operation shaft 20 according to the vertical rotation around
Is slid up and down along the axis b. A steering lever 26 is connected to the front end of the balance arm 24 around a horizontal axis d so as to be able to swing up and down, and the steering lever 26 is moved to an arbitrary up and down position by a disc spring or the like provided on the axis d. It is configured to be able to hold.

As shown in FIGS. 6 and 7, the steering lever 2
6 is provided at the base end thereof with a contact portion 26a which extends under the front end of the balance arm 24. As shown in FIG. 3, the steering lever 26 is moved forward by a predetermined angle α from a substantially vertical standing posture. The contact portion 26a contacts the front end of the balance arm 24 from below, and the steering lever 26 cannot fall further forward with respect to the balance arm 24. As shown in FIG. 3, when the steering lever 26 is tilted forward in a range of a predetermined angle β larger than the predetermined angle α, the steering lever 26
The balance arm 24 integrated with the rotating arm 24 rotates about the axis c, the rear end of the balance arm 24 moves upward, and the operation shaft 2
0 is slid upward.

[0006] As shown in FIG.
A disk 28 having a pair of pins 27 erected upward is fixed, and an engaging hole 29 facing the pins 27 is provided on the operation sprocket 16. When the operation shaft 20 is slid downward, the pin 27 is disengaged from the engagement hole 29, the link between the operation shaft 20 and the operation sprocket 16 is disconnected, and the operation shaft 20 is slid upward. As a result, the pin 27 engages with the engagement hole 29 and the operation shaft 20
And the operation sprocket 16 are connected.

As described above, when the steering lever 26 is set in the upright posture, the link between the operating shaft 20 and the operating sprocket 16 is broken, and when the steering lever 26 falls forward within the range of the predetermined angle β, Operation shaft 20 and operation sprocket 16
Are connected to each other.

In this state, when the steering lever 26 is tilted forward by a predetermined angle α or more and the operation shaft 20 and the operation sprocket 16 are connected, the steering lever 26 is swung right and left, thereby turning the bracket. The operation shaft 20 rotates together with the operation sprocket 16 to rotate the operation sprocket 16. The rotation of the operation sprocket 16 is transmitted to the sprocket 15 by the chain 17, and the pitman arm 11 is rotated.
Is forcibly operated in the same direction as the operation direction of the steering lever 26.

[0009] As shown in FIGS.
4 is provided at the bottom with a lock shaft 32 that is rotated around a vertical axis e by a lever 31 that vertically penetrates the rotation bracket 23, and a lock claw 33 at the upper end of the lock shaft 32 is attached to the rotation bracket 23. And the lock claw 33 can be switched to a lock release state in which the lock claw 33 faces the central space of the rotating bracket 23. Therefore, the steering lever 26 is set to the standing posture,
If the lock shaft 32 is rotated in the locked state as shown in FIG. 8 in a state where the linkage between the operation sprocket 16 and the operation sprocket 16 is stopped, the balance arm 24 cannot be rotated in the pulling direction of the operation shaft 20. Become. At the time of normal boarding operation, by setting the steering lever 26 to the upright posture and keeping the lock, even if the pitman arm 11 is operated left and right by steering with the steering handle 10, the operation sprocket 16 only idles. Therefore, the operation shaft 20 is not operated.

As shown in FIG. 10, when the traveling machine 3 is moved in and out of a field through a relatively steep slope, or when the traveling machine 3 is loaded and unloaded on a truck bed using a step board, etc. When maneuvering in a state where the forward and backward inclination of the traveling body 3 is large, the balance arm 24 is operated by the lever 31.
In a state where the lock is released, the steering lever 26 is tilted forward at a predetermined angle α or more to connect the operation shaft 20 and the operation sprocket 16, and a worker standing on the ground in front of the traveling body 3 steers. By swinging the lever 26 right and left, the pitman arm 11 is forcibly operated, and the traveling body 3 is steered in a desired direction while moving at extremely low speed. When the disc 28 comes into contact with the lower surface of the operation sprocket 16, it is impossible to further lower the steering lever 26, and in this state, the pushing force of the steering lever 26 is transmitted to the front of the traveling body 3 to travel. It is possible to steer while preventing the front of the body 3 from lifting up.

As shown in FIGS. 6 and 9, a traction pin 35 is provided at the upper end of the operation shaft 20 so as to protrude rearward, and a V-shaped guide concave portion 37 is formed in a traction metal fitting 36 provided on the traveling body 3 side. Have been. Thus, when the steering lever 26 is set to the upright posture while the operation shaft 20 is slid downward, the steering lever 26 is directed toward the front of the traveling machine body 3 (the pitman arm 11 is directed straight forward).
Thus, the steering lever 26 is in the standing posture.

When the vehicle is steered from the ground using the steering lever 26, the following structure is provided in order to stop the traveling body 3. As shown in FIGS. 2 and 4, a main clutch pedal 41 is provided at a left front portion of an operation step 40 of the traveling body 3, and a pair of left and right steering pedals 42 is provided at a right front portion of the operation step 40. The steering pedal 42 and the left and right side clutches / brakes 43 provided inside the rear transmission case 9 are independently linked by rods 44.

As shown in FIGS. 2, 4, and 5, the main clutch lever 45 is extended forward from the main clutch pedal 41, and the main clutch pedal 41 is manually turned off from the front of the traveling machine body 3. be able to. Main clutch pedal 4
The right end of the link shaft 46 and the left and right steering pedals 42 are linked via a link fitting 48 provided with an elongated hole 47. When the main clutch pedal 41 is disengaged from the clutch, the left and right steering pedals 42 are operated in the depressing direction via the link fitting 48, the left and right side clutches / brakes 43 are simultaneously operated, and the machine body is stopped. The main clutch pedal 41 can be locked and fixed at a depressed operation position by a lock lever 49, and is used when the traveling body 3 is stopped in an inclined state.

As shown in FIGS. 2 and 3, the steering lever 2
6, a loop-shaped handle portion 26a is formed at the tip end.
Holding the handle 26a of the steering lever 26 in the lying posture,
It is easy to push and pull the traveling body 3 back and forth. The steering lever 26 is provided with a collapsible sight 50 for visually confirming the forward direction of the traveling machine body 3 during the planting and traveling operation. Fold it backwards for use. As shown by a two-dot chain line in FIG. 3, at the time of maintenance in which the engine hood 51 is opened and the area around the engine 6 is inspected and maintained, the sighting tool 50 is raised and the engine hood 5 is raised.
1 can also be used to lock and hold in an open position.

[Another Embodiment of the Invention] The present invention can also be carried out in the following modes. Briefly, the steering lever 26 and the operating sprocket 16
May always be linked.

As shown in FIG. 11, the balance arm 24
The rotation bracket 2 is provided with an engagement pin 61 that can be inserted into and removed from the rotation bracket 2.
A plurality of engaging holes 62 into which the engaging pins 61 are inserted are formed on an arc centered on the axis c, and the balance arm 24 and the steering lever 26 are integrated to perform steering. The lever 26 can be fixed and used in a plurality of lying postures. Thereby, while operating the steering lever 26 sideways,
It is possible to operate by applying force in the vertical direction.

As shown in FIG. 12, a main clutch lever 64 linked to the main clutch pedal 41 via a wire 63 is provided near the handle 26 a of the steering lever 26, and the handle 26 a and the main clutch lever 64 are connected to each other. It is convenient to construct so that the traveling body 3 can be stopped by performing the gripping operation together.

As shown in FIG. 13, the balance arm 24
Arm 24a extending left and right from the left and right rear wheels 2
When the front lever 1 is steered by operating the steering lever 26 to the left or right from the straight traveling position to the set angle or more from the straight traveling position, the side clutch / brake 43 of the inner rear wheel 2 is steered. The brake 43 may be operated to stop the rear wheel 2 on the inside of the steering. As a result, it is possible to operate the traveling body 3 with a small turn from the ground. In this case, when the steering lever 26 is operated to the left or right from the straight traveling position by a set angle or more, only the side clutch of the rear wheel 2 may be disengaged.

The steering lever 26 and the operating sprocket 1
The connection / disconnection mechanism 30 for linking and releasing the link 6 can be switched by a dedicated operation lever or the like.

In a model in which the left and right rear wheels 2 are driven via a differential mechanism and a side brake, when the steering lever 26 is operated from the straight traveling position to the left or right by a predetermined angle or more, the side brakes of the inner rear wheels 2 are steered. By performing the braking operation, it is also possible to enable a small turning movement during ground operation.

A sprocket 15 as a rotating member that rotates integrally with the pitman arm 11, and the steering lever 2
It is possible to change the operating sprocket 16 as a rotating operating member rotated by 6 into a gear, and to engage the sprocket 15 and the operating sprocket 16 with the intermediate gear to rotate the pitman arm 11 in the operating direction of the steering lever 26. It is. The turning member that rotates integrally with the pitman arm 11 and the turning operation member that rotates by the steering lever 26 are constituted by arm members, and the sprocket 15 and the operating sprocket 16 are linked and connected by a rod. Pitman arm 11 in the operation direction
Can be operated.

As a simple structure, the steering lever 26
Is detachably attached to the operation sprocket 16, the operation sprocket 16 is rotated by the attached steering lever 26 only during ground operation, and the steering lever 26 is removed and stored during normal boarding operation. You can also do so.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is a perspective view of a front portion of the traveling body.

FIG. 3 is a side view of a front portion of the traveling body.

FIG. 4 is a schematic plan view of a control system of the traveling aircraft.

FIG. 5 is a side view showing an expanded operation system of a main clutch pedal and a steering pedal.

FIG. 6 is a longitudinal sectional side view near the base of the steering lever.

FIG. 7 is a cross-sectional plan view near the base of the steering lever.

FIG. 8 is a longitudinal sectional front view near the base of the steering lever.

FIG. 9 is a rear view near the base of the steering lever.

FIG. 10 is a side view showing a state during ground control.

FIG. 11 is a longitudinal side view of the vicinity of a base portion of a steering lever according to another embodiment of the invention.

FIG. 12 is a plan view showing the vicinity of a steering lever according to another embodiment of the present invention.

FIG. 13 is a schematic plan view of a control system of a traveling vehicle according to another embodiment of the invention.

[Explanation of symbols]

 3 traveling body 26 lever

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazuo Aoki 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Inventor Hiroyuki Miki 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (72) Inventor Hisadaira Ouchi 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (72) Inventor Tsuyoshi Inoue 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture F-term, Kubota Sakai Works ) 3D030 DH21

Claims (1)

[Claims] 1. A ground control lever is provided so as to be switchable between a standing posture standing at a front part of a traveling body and a falling posture extending forward from the front part of the traveling body, and the lever is gripped and operated. A ground control device for a riding-type agricultural work machine configured to perform an aircraft stop operation in a state.