JP2866555B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter, and more particularly to an improvement in a mechanism for transmitting power to a working device other than a seedling planting device.

[0002]

2. Description of the Related Art As a rice transplanter having a mechanism for transmitting power in addition to a seedling plant as described above, there is a rice transplanter disclosed in Japanese Patent Application Laid-Open No. Hei 3-10605. And an output system for transmitting power to devices other than the seedling planting device are independently formed.

[0003]

In the prior art configuration, a transmission between the stocks is provided on the transmission side of the output shaft for transmitting power to the seedling planting device, and a clutch for cutting off the transmission when the output torque reaches a certain level or more. A mechanism is arranged, and an inter-stock transmission and an output shaft to which power is transmitted without passing through the clutch mechanism are provided, and power is transmitted to a working device of a device other than the seedling planting device.

[0004] The seedling planting apparatus is protected by the above-mentioned clutch mechanism in order to perform a highly accurate operation of cutting out seedlings one by one from a mat-shaped seedling with planting claws and planting them in a field. Since the power plant requires a torque larger than that of the seedling plant, an output system is formed so as to transmit power not via the clutch mechanism.

[0005] However, when driving a working device other than the seedling planting device, it is desired to improve the ability to select a drive speed and a driving torque corresponding to the working device by changing the speed in multiple stages. An object of the present invention is to rationally configure a rice transplanter that can easily select a driving speed and a driving torque corresponding to a working device other than the seedling planting device.

[0006]

A feature of the present invention is that a traveling transmission system is connected to a traveling body so as to be separable, and transmits power from an engine provided in the traveling body to traveling wheels. , The driving force synchronized with the traveling transmission system
A transmission system for transmitting the power to the first output shaft is formed by forming a planting transmission system for transmitting the seedling to the seedling planting device via an output shaft, and a synchronous relationship between the traveling transmission system and the planting transmission system. And a clutch mechanism that reaches a non-transmission state by the action of a torque greater than or equal to a set value, and a driving force from the transmission means is directly transmitted without passing through the clutch mechanism. The two output shafts are provided separately from the first output shaft, and the operation and effect are as follows.

[0007]

According to the above feature, when driving a working device other than the seedling planting device, the power from the second output shaft is transmitted to the working device, so that power not via the clutch mechanism is taken out. By the speed change operation of the speed change means, power of a plurality of types of drive speeds and drive torques is taken out. That is, in the present invention, the power is not taken through the clutch mechanism, so that the working device can be driven with a relatively large torque as in the conventional example, and at the same time, the synchronization between the traveling transmission system and the working transmission system can be achieved. An arbitrary drive speed and drive torque can be selected by using a transmission means (inter-stock transmission) for changing the relationship.

[0008]

Therefore, even if a special transmission is not provided,
Thus, a rice transplanter capable of easily selecting a drive speed and a drive torque corresponding to a working device other than the seedling planting device was rationally configured.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 9, a traveling body 1 includes front wheels 2 and rear wheels 3 as traveling wheels, an engine 4 is provided at a front portion of the traveling body 1, a shift lever 5 is provided at a central portion, and a pair of left and right wheels is provided. , A driver's seat 7, a transmission case 8 at a rear portion, a seedling mounting table 9 on which a mat-shaped seedling is mounted at a rear end, a planting mechanism 10, a plurality of leveling floats. The seedling planting apparatus A provided with each of the eleven is connected so as to be able to move up and down freely to constitute a rice transplanter.

As shown in FIG. 1, the transmission case 8 has an input shaft 12 to which power from the engine 4 is transmitted, a belt type continuously variable transmission B, a multi-plate type main clutch mechanism C, and a hydraulic type. And a two-speed transmission mechanism E for switching the traveling speed between high and low.

The continuously variable transmission B has a first shaft 13 on the input side.
And a second shaft 14 on the output side, an endless belt 16 wound around each pulley 15, 15, and a system for adjusting the winding diameter of the belt 16 around the pulleys 15. The main clutch mechanism C is provided for the second shaft 14, and the forward / reverse switching mechanism D is a multi-plate type hydraulic clutch that transmits the power from the second shaft 14 to the third shaft 17 in a forward rotation state. 18 and a multi-plate type hydraulic clutch 20 that transmits a reverse rotation to the third shaft 17 via an idle gear 19. The third shaft 17 receives power via a fourth shaft 21 from the third shaft 17. The five-shaft 22 is provided with the shift gear type two-stage transmission mechanism E, and the driving force of the fifth shaft 22 is transmitted to the transmission system to the front wheels 2 via the front-wheel drive shaft 23, and the differential device 24, the transmission shaft 25, via the deceleration case 26 It is configured to be transmitted to the axle 27 of the rear wheel 3.

The transmission case 8 includes the first shaft 1
3 is provided with a hydraulic pump 28 driven by the power from the rear wheel 3, and a transmission shaft 25 for the rear wheel 3 is provided with a multi-plate type side brake mechanism 29 which is operated by the steering pedal 6.

As shown in FIGS. 2 to 4, the second shaft 1
A shift-gear inter-gear transmission G as transmission means for changing the synchronous relationship between the traveling transmission system and the planting transmission system between the sixth shaft 30 and the seventh shaft 31 to which the power from the fourth shaft is transmitted;
The power from the seventh shaft 31 is passed through a bevel gear mechanism 32, a safety clutch 33 as a clutch mechanism that reaches a non-transmission state by the action of a torque greater than a set value, a gear transmission mechanism 34, and a fixed-position stop clutch 35. A transmission system to the first output shaft 36 for transmitting to the planting device, and a second output shaft 37 for operation to which power without the safety clutch 33 is transmitted are provided.

The safety clutch mechanism 33 is connected to the second output shaft 3.
7, a disk-shaped member 33A which is fitted to the shaft so as to be capable of transmitting torque and slidably in the axial direction, and a member 33B which is rotatably supported by the shaft (the gear transmission mechanism 34).
Are also used), a plurality of balls 33C engaged and arranged therebetween, and a spring 33 for pressing the disc-shaped member 33A and the ball 33C against the member 33B.
D, and the fixed position stop clutch 35 is configured to operate along the first output shaft 36 to stop the rotation of the first output shaft 36 at a predetermined rotation phase.

As described above, since the output system to the seedling planting apparatus A and the output system to the working device other than the seedling planting apparatus are configured, for example, a device for medium tillage work is used instead of the seedling planting apparatus A. When the work is connected to the machine body 1, the gear can be driven at a desired drive speed with a desired drive torque by selecting a shift speed by the inter-gear transmission G configured to be shiftable to six speeds. .

The shift lever 5 is provided with a forward / reverse switching device D,
Each of the two-stage transmission mechanisms E is configured to be operable, and the transmission lever 5 is configured to be operable along the path of the guide plate 38 shown in FIGS. 5 to 8, and is set at the high speed position H on the first path side 38A. When the aircraft is driven at a high speed, such as when traveling on a road, and is set to the low speed position L on the first route side 38A, the aircraft 1 is run at a low speed suitable for work. When the vehicle 1 is moved forward and the reverse position R is set, the fuselage 1 is configured to move backward. Each of the high-speed position H and the low-speed position L can be selected only in the forward state, and the structure will be described below.

As shown in FIG. 5, the first rocking member 39 and the second rocking member 40 each having notches 39A and 40A into which the shift lever 5 can be engaged are rocked around the axis X. The first oscillating member 39 is mechanically linked to the two-stage transmission mechanism E, and the second oscillating member 40 is connected to the forward / reverse switching mechanism D.
6 to 8 in conjunction with a hydraulic valve 41 for controlling
As shown in the figure, stoppers 42 and 42 for determining the swing range of the first swing member 39 and a stopper 42 for determining the operation limit of the second swing member 40 on the forward side are formed, and the first swing member 3 is formed.
9, a stopper portion 39B for determining an operation limit on the reverse side of the second swinging member 40 is formed. Further, as shown in FIG.
The swing member 39 is in a swing posture corresponding to the low-speed position L,
Only when the second swinging member 40 is in the swinging posture corresponding to the forward position F, the speed change lever 5 can be switched between the respective notches 39A and 40A between the first path 38A and the second path 38B. And it is composed.

By configuring the operation system of the speed change lever 5 in this manner, at the time of speed change operation, a single speed change lever 5 can be operated only along the guide plate 38 so as to move at high speed, low speed, and low speed. You can do reverse.

[Other Embodiments] The present invention provides, in addition to the above embodiment,
It is possible to drive the weeding device by the power of the second output shaft, and it is also possible to drive a car wash and water supply pump.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a diagram of a traveling power transmission system.

FIG. 2 is a diagram of a transmission system to first and second output shafts;

FIG. 3 is a sectional view showing first and second output shafts;

FIG. 4 is a side view showing an arrangement of first and second output shafts.

FIG. 5 is a perspective view showing an operation structure of a shift lever.

FIG. 6A is a plan view of the first and second swing members in a low-speed forward state. FIG. 6B is a plan view of a guide plate and a shift lever in a low-speed forward state.

FIG. 7A is a plan view of the first and second swing members in a high-speed forward state. FIG. 7B is a plan view of a guide plate and a speed change lever in a high-speed forward state.

8A is a plan view of the first and second swing members in a low-speed reverse state, and FIG. 8B is a plan view of a guide plate and a shift lever in a low-speed reverse state.

FIG. 9 is an overall side view of the rice transplanter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 2, 3 Running wheels 4 Engine 33 Clutch mechanism 36 1st output shaft 37 2nd output shaft A Seedling plant G Transmission means

Claims (1)

(57) [Claims] A seedling planting device (A) is detachably connected to a traveling body (1), and power from an engine (4) provided in the traveling body (1) is applied to traveling wheels (2), (1). 3) a seedling planting device (A) via a first output shaft (36) for transmitting a driving power transmission system for transmitting the driving power to the driving power transmission system and a driving power synchronized with the driving power transmission system
Transmission means for transmitting the power to the first output shaft (36) for changing the synchronous relationship between the traveling transmission system and the planting transmission system. ),
And a clutch mechanism (33) which reaches a non-transmission state by the action of a torque greater than or equal to a set value, and a driving force from the transmission means (G) is directly transmitted without passing through the clutch mechanism (33). A rice transplanter having a transmitted second output shaft (37) separately from the first output shaft (36).