JP3811547B2 - Steering devices such as riding rice transplanters - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the field of passenger rice transplanters and the like, and more particularly relates to a steering device capable of interlocking the steering angle and engine speed of a passenger rice transplanter or the like.
[0002]
[Prior art]
In conventional passenger rice transplanters and the like, the steering angle and the engine speed are not related to each other, and they are independent steering operations and accelerator lever operations.
[0003]
[Problems to be solved by the invention]
In the conventional riding type rice transplanters, etc., the steering angle and the engine speed are not related to each other. In some places, the aircraft may lose balance, so it is necessary to operate the accelerator lever to slow down the engine.
[0004]
[Means for Solving the Problems]
However, the present invention aims to reduce the safety of the aircraft and the psychological burden on the operator in a riding type rice transplanter and the like, and as a means for solving the problem, the electromagnetic switch is used only when the main shift lever is shifted to traveling. It was configured to be ON, the grooved clutch cam was activated, and the engine speed was reduced, and it was configured to change only from high speed rotation to low speed rotation. According to this, the balance of the airframe during the traveling of the riding type rice transplanter or the like is maintained, and safety can be sufficiently achieved.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a perspective view of a riding type rice transplanter, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, FIG. 4 is a sectional view of a steering gear box, and FIG. 5 is a main transmission lever and a guide plate.
In the figure, (1) is a riding type rice transplanter on which an operator is boarded. The engine (2) is mounted on the front upper part of the body frame (3), the body frame (3) is the front traveling wheel (4), and the rear traveling is performed. A ring (5) is provided.
A steering handle, that is, a steering wheel (7) is attached to the rear part of the bonnet (6) that covers the engine and the like, and a driver seat (9) is attached to the upper part of the vehicle body cover (8) on which an operator rides. . A main transmission lever (10) is provided on the left side of the driver's seat (9), and an accelerator lever (11) is provided on the right side.
The switch (SW) is a switch that is provided inside the guide plate (G) and is operated by pressing the lever (10) when the main transmission lever (10) is shifted to the moving speed.
[0006]
The steering wheel (7) is attached to a steering rod (12), the steering rod (12) is attached to a central gear (14) of a steering gear box (13), and an output of the central gear (14). A steering yoke (16) for restricting the steering angle is fixed to the shaft (15), and tie rods (17) and (17) are connected to the left and right of the yoke (16), and the left and right tie rods (17) and (17) are connected. ), The front traveling wheels (4) and (4) are steered.
[0007]
Further, as shown in FIG. 6, the detailed configuration of the steering yoke is such that the steering yoke (16) attached to the output shaft (15) of the central gear (14) of the steering gear box (13) has a fan shape. A rod (16A) is vertically joined to the yoke (16), and a lower end thereof has a ball joint (16B) and is joined to a plate (19A) described later.
Further, the transmission shaft (18) is provided with a grooved clutch cam (K), one side of the transmission shaft (18) is provided with a steering side grooved clutch cam (19), and the other side is provided with an accelerator lever ( 11), an accelerator lever side grooved clutch cam (20) is disposed, and the former, ie, the steering side grooved clutch cam (19) is biased by a spring (21), and the latter, ie, the accelerator lever side grooved clutch cam (20). ) Is connected to an electromagnetic switch (24), and the electromagnetic switch (24) is linked to a switch (SW) that operates when the main transmission lever (10) is shifted to traveling. The grooved clutch cam (K) is a cam having a function of always returning to a certain position by a spring force, and a sectional view thereof has a shape of AA on the steering side and BB on the accelerator side.
A plate (19A) is provided on the clutch-side grooved cam (19) at a position approximately 90 degrees perpendicular to the cam axis, and a plate (20A) is provided above the accelerator lever-side grooved clutch cam (20). The steering grooved plate (19A) is joined by a ball joint (16B) at the lower end of the rod (16A) provided on the lower surface of the steering yoke (16), and the accelerator lever side plate (20A) is connected via a wire (23). It is connected to a regulating cam (22) provided with a long hole (22A).
[0008]
In the riding type rice transplanter having the above configuration, the clutch cam (19) with a groove on the steering side is always biased by a spring (21), and the plate (19) is a rod (16A) provided on the steering yoke (16). When the main transmission lever (10) is shifted to the moving speed while being joined to the ball joint (16B) at the tip, the lever (10) presses the switch (SW) to turn it on, and the switch (SW ) Interlocked with the electromagnetic switch (24), the accelerator lever side grooved clutch cam (20) slides to the steering side grooved clutch cam (19), and both grooved cams (K) are engaged. Then, the cam (K) is moved to the left in FIG. 6 against the biasing force of the spring (21), and a gear (not shown) is fitted to the transmission shaft (18). The gear ratio of the) switching changes to the low-speed rotation from the high-speed rotation.
At this time, since the accelerator lever side grooved clutch (20) moves while tilting to the steering side grooved clutch (19), the wire (23) connected to the accelerator lever (11) is pulled, and the lever (11) is moved. Maintain a semi-locked state.
[0009]
The rotation operation of the steering wheel will be described with reference to FIGS. 7 (a) and 7 (b) in a state where the rotational speed of the engine is switched from high speed rotation to low speed rotation.
When the steering wheel (7) is rotated counterclockwise, as shown in FIG. 7 (a), the rod (16A) joined to the steering yoke (16) moves together with the plate (19A) in the diagonally right direction when viewed from the front. Similarly, when the steering wheel (7) is rotated in the clockwise direction, the rod (16A) moves in the diagonally left direction as viewed from the front as shown in FIG. Furthermore, if the steering rotation, that is, the steering angle increases, the grooved cam (K) functions to operate at a lower speed, so even if the steering is suddenly operated, There is no fear of losing balance.
Next, when it is desired to move backward from the traveling or move to the planting operation, the accelerator lever side groove clutch cam (20) is moved to the electromagnetic switch (20) via the wire (23) by operating the half-locked accelerator lever (11). 24) Pulling it toward the side, turning OFF the electromagnetic switch (24), disengaging the grooved clutch (K), returning to the initial state by the biasing force of the spring (21), and reducing the engine speed It is possible to switch from rotation to high-speed rotation.
[0010]
According to the above configuration, the electromagnetic switch is activated only when the main shift lever is shifted to the moving speed, the clutch cam is brought into contact, the engine speed is switched from high speed to low speed, the steering angle and the engine speed are changed. When the accelerator lever is switched at a high speed in the low speed rotation state, the cam connected to the wire is operated, the electromagnetic switch is turned off, and the grooved clutch returns to the initial state.
As described above, when the main speed change lever is shifted to the moving speed, the engine speed is rotated at a low speed, so that there is no trouble caused by the sudden handle, and safety is sufficiently maintained.
[0012]
【The invention's effect】
As is apparent from the description of the embodiment of the present invention, since the steering angle and the engine speed are conventionally independent operations, if the steering wheel is suddenly cut during traveling, the unevenness of the ground However, as in the present invention, only when the main speed change lever is shifted to the moving speed, the electromagnetic switch is activated, the clutch cam is in contact, and the engine speed is Since it changes from high speed to low speed and interlocks with the turning angle of the steering wheel, the engine speed will automatically drop even when the steering wheel has to be operated suddenly, so there is no loss of balance. The safety of the aircraft can be secured, the operator can operate with peace of mind, and the steering is returned because it is moving from high speed rotation to low speed rotation. Because even in the low-speed rotation is safe can be operated smoothly.
[Brief description of the drawings]
FIG. 1 is a perspective view of a riding rice transplanter. FIG. 2 is a side view of the riding rice transplanter. FIG. 3 is a plan view of the riding rice transplanter. FIG. 4 is a cross-sectional view of a steering gear box. And guide diagram [Fig. 6] Diagram of steering yoke and grooved clutch cam [Fig. 7] (A) State diagram of steering wheel rotating clockwise (b) State diagram of steering wheel rotating counterclockwise [Code] Explanation of]
4 Front wheel 5 Rear wheel 7 Steering wheel 10 Main transmission lever 11 Accelerator lever 11A Protrusion 11B Wire 11D Rod 12 Steering rod 13 Steering gear box 14 Central gear 15 Output shaft 16 Steering yoke 16A Rod 16B Ball joint 16C Long hole 18 Transmission shaft 19 Steering wheel Side grooved clutch cam 19A Steering side plate 20 Accelerator lever side grooved clutch cam 20A Accelerator lever side plate 21 Spring 22 Regulating cam 23 Wire 24 Electromagnetic switch 25 Tracking cam K Grooved clutch cam SW Switch G Guide plate

Claims (2)

In a riding rice transplanter equipped with an engine in a vehicle body frame, a steering wheel behind the hood that covers the engine, and a main shift lever, etc., a clutch cam biased by a spring on one side of the transmission shaft, and the other A clutch cam associated with an accelerator lever and connected to an accelerator lever, and only when the main shift lever is shifted to travel, the switch is operated in conjunction with a switch operated by pressing the main shift lever. The electromagnetic switch is activated to engage the clutch cam associated with the accelerator lever and the clutch cam biased by the spring, and the gear ratio of the gear fitted to the transmission shaft is changed from high speed to low speed. by switching the rotation, the engine speed is switched to low speed from high speed, the steering angle and the engine speed Steering apparatus such as a riding rice transplanter, characterized in that by moving.   When the steering angle and the engine speed are linked, the engine speed is switched from a high speed to a low speed when the main shift lever is shifted to the traveling travel, and the steering angle is further increased. The steering device for a riding type rice transplanter or the like according to claim 1, wherein the steering device changes only to a low-speed rotation.

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