JPH02193779A - Traveling device for paddy field work vehicles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a traveling device for a paddy field work vehicle having traveling wheels attached to the left and right sides of the vehicle.

[Conventional technology]

Conventionally, in paddy field work vehicles, for example,
As shown in Publication No. 403, the first
The running wheels and the second running wheels are arranged in parallel in the lateral direction of the fuselage so that they can be freely driven, and the areas on which the running wheels touch the ground for propulsion of the aircraft are made relatively large on each of the left and right individuals.
The ground-contact surface acts at locations dispersed in the lateral direction of the vehicle, so even if the hardness of the plow or mud changes in the lateral direction of the vehicle, there is little difference in the propulsion force between the left and right sides, resulting in good straight-line performance. There was something that could be maintained.

[Problem to be solved by the invention]

Conventionally, when turning the machine at the edge of a field, the first running wheel and the second running wheel had to be kept in the same configuration as when working, and the turning resistance caused by the running wheels was large. Inconveniences such as increased field disturbance and increased turning radius were more likely to occur.

The purpose of the present invention is to enable work traveling in a straight line state,
Moreover, it is an object of the present invention to provide a working vehicle for paddy fields that can turn with little resistance.

[Means to solve the problem]

In the running device for a paddy field work vehicle according to the present invention, in order to achieve the purpose, the left and right wheels of the machine are individually provided with a first running wheel and a second running wheel.
a first running mode in which running wheels are arranged in parallel in the lateral direction of the aircraft body, and both the first running wheels and the second running wheels on the left and right sides are driven; and the first running wheels on both the left and right sides. A clutch mechanism is provided that selectively produces a second traveling mode in which the wheels are driven and both the left and right second traveling wheels are in an idle state, or
A first running wheel and a second running wheel are provided on each of the left and right sides of the aircraft so as to be freely drivable in parallel in the lateral direction of the aircraft, and the first running wheel and the second running wheel are separated from each other on both the left and right sides. A wheel position change mechanism is provided that selectively displays a first traveling mode in which the first traveling wheel and the second traveling wheel approach each other on both the left and right sides by means of a driving force. There is. The functions and effects thereof are as follows.

[For production]

In the former clutch type, when the first traveling mode is achieved by operating the clutch mechanism, both the first traveling wheel and the second traveling wheel are driven on both the left and right sides, and a large ground contact surface is created by both axles. can be used to propel the aircraft.

When the second traveling mode is developed, the first traveling wheels are driven on both the left and right sides and the aircraft can be propelled, but the second traveling wheels are in an idle state and the aircraft rolls as the aircraft turns. The first traveling wheel and the first running wheel can be moved at the same time.

In the latter position change type, when the first travel mode is achieved by operating the wheel position change mechanism, the first travel wheel and the second travel wheel are driven in a separated state on both the left and right sides, and both axles are driven in a separated state. The aircraft can be propelled by making the ground contact areas dispersed across the width of the vehicle. When the second traveling mode is developed, both the first traveling wheel and the second traveling wheel are driven on both the left and right sides to propel the aircraft, but the first traveling wheel and the second traveling wheel are driven. When the vehicle wheels approach and the aircraft turns, the difference in turning radius between the first travel wheel and the second travel wheel becomes smaller than the difference in turning radius when turning in the first travel mode, and this turning radius difference When the slip of the first running wheel and the second running wheel due to the two-wheel drive is reduced, it becomes less likely to occur.

〔Effect of the invention〕

Because of the multiple wheels and the clutch mechanism or wheel position change mechanism, during work driving, both the first and second traveling wheels have a large area of contact with the ground, and the contact surfaces are dispersed in the lateral direction of the vehicle body. This makes it possible to drive with improved straightness, resulting in a good work finish such as keeping the rows of planted seedlings as straight as possible.Moreover, at the edge of the field, the second running wheels on both the left and right sides can be freely rotated. Alternatively, the running resistance and wheel slip caused by the wheels can be reduced by bringing the first running wheels and the second running wheels closer together, so that the field can be turned while minimizing disturbance and making the turning radius as small as possible. became.

〔Example〕

Next, examples will be shown.

As shown in Figure 4, a lift cylinder (3) is installed at the rear of the traveling aircraft, which has a spare seedling stand (1) and a driver's seat (2).
A link mechanism configured to swing up and down (
The seedling planting device (5) is connected to the seedling planting device (5) so as to be operated up and down via the device 4), and the driving body is configured to transmit power to the seedling planting device (5) through the rotating shaft (6). It consists of a riding type rice transplanter capable of planting 4 rows.

In order to enable the aircraft to travel, front wheels (FW) are provided on the left and right sides of the driving unit of the traveling aircraft so that they can be driven and steered, and front wheels (FW) are provided on the left and right individuals at the rear end of the traveling aircraft so that they can be operated and steered. A first rear wheel (Rw1) and a second rear wheel (RWz) are arranged concentrically in parallel in the lateral direction of the aircraft body.

As shown in Fig. 1 and Fig. 3, the first rear wheels (Rtv) of the left and right individuals are connected to the main frame (7) of the main frame of the aircraft around the input shaft center (P). An axle (92) utilizing an axle shape is attached to a drive type rear axle (91) or (9r) attached to a frame portion (7a) which is pivotally supported so as to swing up and down via a rear wheel transmission case (8). ) or (9r) and the wheel boss part (10) so that they rotate together, and are attached so that they do not slide by means of a fixing pin (11). (
RW, ) is located at a location on the inside of the fuselage from the first rear wheel (RW l ) of the rear axle (91) or (9r) due to the difference in the shape of the axle and the flower shape of the wheel boss portion (12). so that it rotates and the axle (9j or (9r)
It is mounted so that it does not slide due to the stopper (13) attached to the wheel and the stopper action of the wheel boss (10). And the left and right rear axles (9m!).

(9r) A clutch member (14N') or (14
r) so as to rotate together by engagement using an axle shape, and the swing fork (151) or (15r)
), and the swing forks (15N) and (15r) are interlocked with the planting clutch lever (17) via a pair of operating wires (16), (16). , planted clutch lever (17
), and
A clutch mechanism (C) is configured to switch the driving mode. That is, as shown in Fig. 1, the planting clutch lever (17) is swung to the clutch engaged position (O
N), both the left and right clutch members (1
41).

(14r) is inserted into the biasing spring (18I1) or (
18r), the second rear wheel (
The clutch pawl portion (Rh) is formed on the boss portion (12) of the
12a), and both the left and right first rear wheels (nu, (Rw1) and second rear wheels (RJ
) and (RJ) are driven together. Then, as shown in Figure 2, move the planting clutch lever (17) to the clutch disengaged position (OFF).
When operated, the operating wire (16) and the swinging fork (
11 or (15r), both left and right clutch members (141)
+ (14r) is slid inside the fuselage and is in the cutting position where it is no longer engaged with the second rear wheel (RW2), and both the left and right first rear wheels (RW, ) and (Q) are driven. is,
And, both the left and right second rear wheels (RWri, (R
Wz) exhibits a second running mode in which it is in an idle rotation state.

In other words, when traveling for work, simply by switching the planting clutch (19) to the engaged position so that the seedling planting device (5) is driven, the clutch mechanism (C) is switched to the engaged side and the seedling planting device (5) is driven. The first rear wheel (RW) and the second rear wheel (RW2) on both the left and right sides propel the aircraft using their propulsion lugs (20a) or (20b). It will become. When the aircraft turns, simply by switching the planting clutch (19) to off so that the drive of the seedling planting device (5) is stopped, the clutch mechanism (C) switches to the cutting side and the seedling planting device (5) stops driving. The first rear wheel (RW, ) appears on both the left and right sides.
is driven to propel the aircraft, but the second rear wheel (RW2)
In order to prevent the wheel from becoming idle and causing running resistance, it is possible to shift to the ground and to make a differential with the first rear wheel (Rwe).

The clutch members (li) and (14r) are formed to be in the engaged position only when the propulsion lug phase of the first rear wheel (Rw, ) and the propulsion lug phase of the second rear wheel (RWz) match. It is.

Figure 5 shows a different implementation structure on the rear wheel side.
The rear wheels (RW 1) are attached to the rear axle (91) or (9r) so as to rotate together with the rear axle (9r) and not to slide. 91
) or (9r), which rotates integrally by engagement of the axle (91) or (9r) with the wheel boss (12) by utilizing the axle shape at a location located inside the fuselage from the first rear wheel (RW1). Installation is as shown. Then, the operating member (21f) or (21r) in which the second rear wheels (RW wheels) of the left and right individuals are engaged with the wheel boss portion (12) so as to allow only relative rotation.
) via hydraulic cylinder (22N) or (22r)
The control valve (23) for the hydraulic cylinders (22A) and (22r) is connected to the planting clutch lever (17) via an operation wire (24). ), the wheel position change mechanism (S) is operated by operating a control valve using a planting clutch lever (17), and the driving mode is changed by hydraulic pressure as an example of driving force. It is composed. That is, when the planting clutch lever (17) is swung to the clutch engaged position (ON) as shown in FIG. 5, the hydraulic cylinder (
221'') or (22r) slides the second rear wheel (RW2) to the inside of the fuselage, and the propulsion lug (20a) of the first rear wheel (R-1) and the propulsion lug of the second rear wheel (RW2) (20
b), and the outer distance between the first rear wheel (Rd1) and the second rear wheel (RW2) is smaller than the distance between the rows of planted seedlings. 2 rear wheels (RW
z) appears in the first running mode in which the two vehicles move away from each other. Then, as shown in Fig. 6, the planting clutch lever (
17) to the clutch disengaged position (OFF>), the hydraulic cylinders (22f) or (22r) on both the left and right sides slide the second rear wheel (RWz) to the outside of the fuselage, and the first rear wheel ( RW1) propulsion lug (20a)
A second running mode is realized in which the first rear wheel (RW1) and the second rear wheel (RW2) approach each other with almost no gap between the propulsion lug (20b) of the second rear wheel (Rhz) and the first rear wheel (RW1). It is.

In other words, when driving for work, simply by turning on the planting clutch (19) to drive the seedling planting device (5), the wheel position change mechanism (S) will not switch to the wheel separation side. The first running mode is exhibited, and the first rear wheel (RW1) and the second rear wheel (RWz) are driven in a separated state on both the left and right sides, and the propulsion lugs (20a) of both axles (20a), (
20b) disperses in the lateral direction of the vehicle to propel the vehicle.

When the aircraft turns, simply by switching off the planting clutch (19) so that the drive of the seedling planting device (5) is stopped, the wheel position change mechanism (S) switches to the wheel approach side. The first rear wheel (RW) and the second rear wheel (RW2) are rotated to reveal the second running mode.
) are driven to propel the aircraft, but the first rear wheels (RW,
) and the second rear wheel (RWz) becomes smaller than in the first driving mode, causing the first rear wheel (Rw, ) and the second rear wheel (Rh) to slip. .

The propulsion lug (20a) or (20b) of the first rear wheel (RW1) and the second rear wheel (RW2) is formed to protrude from the wheel rim toward the other rear wheel. That is, even if mud is lifted by the propulsion lugs (20a) and (20b), the first rear wheel (Rh, ) and the second rear wheel (R
Care must be taken to ensure that the seedlings are unlikely to fall during the period (hg) and onto the planned planting site.

[Another example]

When configuring a clutch system for switching the first rear wheel between a drive state and a reverse rotation state, the wheels on the outside of the body may be used as the wheels to be switched.

When configuring the position change type for changing the wheel spacing, it may be implemented by configuring and implementing a structure in which only the wheels on the outside of the aircraft body are slidably operated, or both the inner and outer wheels are slidably operated.

In addition, in the second driving mode, the inner wheel and the outer wheel approach each other with their propulsion lugs inserted between the propulsion lugs of the other wheel, and the difference in turning radius between the two axles becomes even smaller, and the ground contact area for propulsion by both axles becomes smaller. It may be implemented by configuring and implementing the configuration so that the distance is smaller than that in the first traveling mode.

In either the clutch type or the position change type, the clutch mechanism or the wheel position change mechanism may be configured and implemented using a dedicated operating tool.

The present invention can be applied not only to riding rice transplanters but also to various rice field work vehicles such as direct seeding machines. Moreover, it can be applied to a walking work vehicle, and the first rear wheel (RW1), the second rear wheel (Rh)
The first running wheel (RW1) and the second running wheel (RW2)
).

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the traveling device for a paddy field work vehicle according to the present invention, and FIGS. 1 and 2 are rear views of the rear wheel installation part, and FIGS.
FIG. 4 is a side view of the entire riding-type rice transplanter, and FIGS. 5 and 6 are rear views of the rear wheel mounting portion of another rice transplanter. (RW I”)...First running wheel, (RW
2)...Second traveling wheel. (C)・・・・・・
Clutch mechanism, (S)...Wheel position change mechanism.

Claims (1)

[Claims] 1. A first running wheel (RW_1) and a second running wheel (RW_2) are arranged side by side in the lateral direction of the machine body on each of the left and right sides of the machine body, and the first running wheels on both the left and right sides (RW_1)
and a first traveling mode in which the second traveling wheels (RW_2) are both driven; and a first traveling mode in which both the left and right first traveling wheels (RW_1) are driven, and both the left and right second traveling wheels are driven. A traveling device for a paddy field working vehicle, which is provided with a clutch mechanism (C) that alternatively displays a second traveling mode in which (RW_2) is in an idle state. 2. A first running wheel (RW_1) and a second running wheel (RW_2) are arranged in parallel in the lateral direction of the fuselage and are freely drivable on each of the left and right sides of the fuselage, and the first running wheels (RW_2) are provided on both the left and right sides of the fuselage. RW_1) and the second traveling wheel (RW
A first running mode in which the wheels (RW_2) are separated from each other and a second running mode in which the first running wheels (RW_1) and the second running wheels (RW_2) approach each other on both the left and right sides are selectively selected by driving force. A traveling device for a working vehicle for paddy fields equipped with a wheel position changing mechanism (S) that appears in the figure.