JP2572886Y2 - Transmission in agricultural work machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission for an agricultural working machine such as a rice transplanter, for example, for switching the forward / backward movement of the machine and shifting the running speed.

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Publication No. 15-12346,
JP-A-1-78755, JP-A-2-72251
As shown in Japanese Unexamined Patent Publication No. 55-144242,
A sun gear provided on the input shaft connected to the engine
Planetary gears on the power shaft and planetary gears on the sun gear
A ring gear meshed and connected via a gear, and a ring gear
Gears that mesh with the gears and change the speed of the gears
There is a technique for controlling the rotation of the transmission output shaft by controlling the rotation .

[0003]

SUMMARY OF THE INVENTION The above prior art is based on an input method.
The main electric motor or engine that drives the shaft, and the transmission gear
The load is large because a variable speed electric motor that drives
To obtain the large torque output required for farm work,
Increase the output of the dynamic motor, change gears and ring gears
It is necessary to increase the speed reduction ratio of the
When the power is increased, the motor becomes large and the cost is reduced.
Reduction or simplification of rotation control, etc.
If the reduction ratio of the transmission gear and ring gear is increased,
Speed of the transmission output shaft by rotating the transmission electric motor at high speed.
It is necessary to prevent the operating range from becoming narrow, and to improve durability.
Problems such as difficulty in improving shift response, etc.
There is .

[0004]

In order to solve the problems] However, the present invention is, ene
Sun gear provided on the input shaft connected to the gin
Planetary gears on the shaft and planetary gears on the sun gear
Ring gear meshed and connected via gear
Provide a gear that engages, and change the speed of the gear.
Shifting in agricultural work machines that control the rotation of the shifting output shaft
In the equipment, there is no
Attach step-variable pulleys, and change each stepless pulley continuously.
Speed belt, and the rotational force of the input shaft is
The transmission gear is rotated by continuously variable transmission by means of a belt and a belt.
To change the speed and direction of the transmission output shaft.
With a continuously variable pulley and belt
To connect the transmission gear to the input shaft.
Drive suitable for agricultural work where the load increases.
Speed output can be easily obtained from the transmission output shaft, and the transmission gear rotation control
Simplifies control and increases shift output torque.
Expansion of high torque transmission output range and transmission
It can easily improve the shifting function such as responsiveness.
There is .

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view of a transmission, and FIG. 2 is an overall side view of a riding rice transplanter. In FIG. 1, (1) is a riding rice transplanter on which a worker rides, and a body frame (3) on which an engine (2) is mounted. The rear end is connected to the transmission case (4), and the front paddle traveling wheel (6) is supported on both front sides of the transmission case (4) via an axle case (5). A paddle traveling rear wheel (8) is supported on both sides of a rear portion of the vehicle via a transmission case (7), and a driver's seat (10) is mounted on a vehicle body cover (9) covering the transmission case (7) and the like. (2) Attach the steering handle (12) to the rear of the hood (11) covering the etc., and attach the seedling table (14) and the planting claws (15) to the rear of the fuselage via the three-point link mechanism (13). To support the planting part (16) At the same time, the front and rear wheels (6) and (8) are driven and moved, and at the same time, the seedlings for one plant are taken out from the seedling mounting table (14) which is reciprocally slid left and right by a planting claw (15). It is configured to perform seedling planting work.

As shown in FIGS. 1 and 3, a transmission (17) provided in the transmission case (4) is a combination of a planetary gear mechanism (18) and a continuously variable belt transmission mechanism (19). A sun gear (21) fixedly mounted on a transmission input shaft (20) interlockingly connected to an output shaft (2a) of the engine (2), and three planetary gears (22) meshed with the sun gear (21) are each gear shaft. A planetary carrier (26) rotatably supported via (23) and interlockingly connecting a transmission output shaft (25) to an axle (24) of the front and rear wheels (6) and (8); and an inner and outer gear (27a). A ring gear (27) having an inner gear (27a) meshed with each planetary gear (22) having a planetary gear mechanism (18);
While the outer gear (27) of the ring gear (27) is provided.
and varying Hayagi Ya (28) meshing to the b), the gear shaft of the gear (28) (29) and said input shaft (20) continuously variable V-between
A continuously variable transmission belt (32) stretched via pulleys (30) and (31) and a pulley movable arm (34) for coupling the speed ratio of the V pulleys (30) and (31) to a rotary screw shaft (33). The belt continuously variable transmission mechanism (19) is provided with a speed change motor (35) variably adjusted via a shaft. The speed of the ring gear (27) is appropriately adjusted by the speed change gear (28) of the stepped speed change mechanism (19) so that the output shaft (25) can be continuously changed in speed and forward / reverse. It is configured to enable a series of vehicle speed changes from forward movement of the body to neutral through reverse.

As is apparent from the above, the engine (2)
Sun gear (21) provided on input shaft (20) connected to
And a planetary gear (2) provided on the transmission output shaft (25).
2) and a planetary gear (22) in the sun gear (21)
A ring gear (27) meshed and connected via
A gear (28) meshed with the gear (27);
The speed change output shaft (25) by changing the rotation speed of the gear (28)
In a transmission in an agricultural work machine that controls the rotation of the
A gear shaft (29) provided with a transmission gear (28) and an input shaft (2
0) and V-pulley (30) (3)
1) is attached, and each continuously variable V pulley (30) (3)
1) is connected by a continuously variable transmission belt (32),
The rotational force of the shaft (20) is applied to the pulleys (30) (31) and
The continuously variable transmission is transmitted by the belt (32) and the transmission gear (2) is transmitted.
8) Rotating the rotation speed and rotation speed of the transmission output shaft (25)
It is configured to change the direction. And stepless change
Via speed V pulley (30) (31) and belt (32)
To connect the transmission gear (28) to the input shaft (20).
The transmission gear (28) is driven by the force shaft (20),
Variable speed output shaft suitable for agricultural work with heavy loads
(25), which is easily obtained from (25), and controls the rotation of the transmission gear (28).
Simplification and transmission output torque increase
In addition, expansion of high torque transmission output range and improvement of transmission response
It is configured to improve the speed change function.

As shown in FIG. 4, between the rim (37) and the front wheel boss (36) on the opposite side of the axle case (5) of the left and right front wheels (6), a spoke (38) is formed so as to cover the outside. The wheel disk (39) can be mounted,
The boss mounting portion (39a) at the center of the disk (39) is bulged outward in a convex shape, and the mounting portion (39a) is
6) The flat outer surface (39b) on the outer diameter side of the disk (39) is dimensioned from the maximum outer edge of the tire lug (41) of the front wheel (6) while being detachably fixed to the outer end surface via a set bolt (40). (T1) The wheel disc (39) of the front wheel (6) is provided so as to be depressed inward when the aircraft is going straight.
However, it is configured to eliminate the inconvenience of cutting the rice field by directly contacting the soil, to reduce the peeling and damage of the painted surface of the wheel disc (39), and to improve the durability thereof.

As shown in FIG. 5, the boss mounting portion (39a) of the wheel disk (39) is also formed in a substantially flat shape so that the entire disk (39) is dimensioned inward from the outer edge of the tire lug (41). t2) Even if it is made to be in a depressed state, the same effect is exerted and the service life and the like can be improved.

This embodiment is constructed as described above, and a series of operations for switching the forward / backward movement of the body and shifting the gears are performed by changing the rotation of the ring gear (27). When the carrier (26) and the output shaft (25) rotate in the right direction of the solid arrow when viewed from the output shaft (25) side as shown in FIG.

(1) The peripheral speed (U2) of the inner gear (27a) in the ring gear (27) is adjusted by the output gear (28) so as to be lower than the peripheral speed (U1) of the sun gear (21) (U2 <U1). Then, each planetary gear (22) revolves rightward, that is, the carrier (26) and the output shaft (25).
Is rotated in the right direction of the solid arrow, and the speed change is performed in the forward state of the aircraft.

(2) When the peripheral speed (U2) of the inner gear (27a) of the ring gear (27) and the peripheral speed (U1) of the sun gear (21) are adjusted to be the same (U2 = U1), each planetary gear ( 22) rotates, the carrier (26) and the output shaft (25) stop rotating, and are maintained in a neutral state.

(3) Next, when the peripheral speed (U2) of the inner gear (27a) of the ring gear (27) is adjusted to be higher (U2> U1) than the peripheral speed (U1) of the sun gear (21), The planetary gear (22) revolves to the left, that is, the carrier (26) and the output shaft (25) rotate to the left as indicated by the dashed arrow, and the gearshift is performed in the reverse state of the aircraft.

As described above, according to the continuously variable transmission mechanism (19) ,
By adjusting the rotational peripheral speed (U2) of the ring gear (27) by the speed control operation of the speed change gear (28) , a series of forward-neutral-reverse shifts can be easily performed steplessly. Moreover, since the transmission of the driving force is performed by the transmission of the gears (21) and (22) by the planetary gear mechanism (18), the efficiency is excellent without any power loss.

In the above-described embodiment, a rice transplanter has been described as an example. However, another agricultural work machine may be used, or the present invention may be used for shifting of a drive unit other than traveling.

[0016]

As is clear from the above embodiments, the present invention is provided on the input shaft (20) connected to the engine (2).
Sun gear (21) and a gear provided on the transmission output shaft (25).
Planetary gears for the planetary gear (22) and the sun gear (21)
The ring gear (2) meshed and connected via the rear gear (22)
7) and the transmission gear (2) meshed with the ring gear (27).
8) to change the rotation speed of the transmission gear (28).
The change in the agricultural work machine that controls the rotation of the speed output shaft (25)
In the transmission, a gear shaft (2) provided with a transmission gear (28) is provided.
9) and the continuously variable pulley (30) (3)
1) are mounted respectively, and each continuously variable speed pulley (30) (31)
Are connected by a continuously variable transmission belt (32), and the input shaft
Apply the rotational force of (20) to the pulleys (30) and (31)
The continuously variable transmission is transmitted by the
8) Rotating the rotation speed and rotation speed of the transmission output shaft (25)
It is configured to change the direction, and
Input shaft via a belt (32) and a belt (32)
The transmission gear (28) is connected to the input shaft (2).
0) drives the transmission gear (28),
The gear shift output shaft (2
5) can be easily obtained from the transmission gear (28) rotation
Easier control and increased shift output torque
And expand the range of high torque transmission output
To easily improve the shifting function, such as improving the shifting response.
Is what you can do .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a transmission.

FIG. 2 is an overall side view of the riding rice transplanter.

FIG. 3 is an explanatory diagram of a transmission.

FIG. 4 is an explanatory view of a wheel disk.

FIG. 5 is an explanatory view showing another modified example of the wheel disk.

[Description of Signs] (2) Engine (20) Input shaft (21) Sun gear (22) Planetary gear (25) Output shaft (27) Ring gear (28) Transmission gear (29) Gear shaft (30) (31) V pulley ( stepless variable speed pulley) (32) continuously variable belt

Claims (1)

(57) [Scope of request for utility model registration] An input shaft (2) connected to an engine (2).
A) a sun gear (21) provided on the transmission output shaft (25);
Planetary gear (22) and sun gear (21)
To be meshed with planetary gears (22)
Gear (27) and a ring gear (27).
A speed gear (28) is provided to change the rotation speed of the speed change gear (28).
Agricultural work machine that controls the rotation of the transmission output shaft (25)
Transmission gear (28) is provided in the transmission device according to (1).
Continuously variable speed pulley on gear shaft (29) and input shaft (20)
(30) and (31) are attached respectively, and each continuously variable speed pulley (3
0) and (31) are connected by a continuously variable transmission belt (32).
And the rotational force of the input shaft (20) is applied to the pulleys (30) (3).
1) and continuously variable transmission by belt (32)
The rotation speed of the transmission output shaft (25) by rotating the gear (28)
And a transmission for changing the rotation direction .