JPH0796839A - Riding type work vehicle - Google Patents

Abstract

PURPOSE:To facilitate operation of a travel car body by an auxiliary handle lever with simple and inexpensive constitution. CONSTITUTION:An installing part to connect an auxiliary handle lever 14 to operate a steering link mechanism 10 from outside of a car so as to be mountable and demountable freely, is arranged in this steering link mechanism 10 to interlock/connect a steering wheel 6 operable from a boarding position with/to direction control wheels 2, and a lever posture changing means A is provided to change a vertical angle of the auxiliary handle lever 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type work vehicle such as a riding type rice transplanter and a relatively small tractor.

[0002]

2. Description of the Related Art In a riding type work vehicle for agriculture, for example,
Access to and from the fields was done by directly overcoming the ridges or by traveling on the slope formed on the ridges. Incidentally, this slope is generally formed in a steep slope in order to effectively use the field scene. In addition, when using a transport vehicle such as a truck to return to and from the farm field, loading and unloading of agricultural work vehicles to and from the loading platform of the transport vehicle is performed by traveling on the step board passed to the loading platform of the transport vehicle. Was there. And these are performed by the driver riding on the traveling vehicle and driving. However, when the traveling vehicle body inclines considerably, the driver may feel anxiety and fear. Therefore, it is desirable to get off the traveling vehicle body and drive.

Therefore, in the past, for example, the actual Kaisho Sho 52-
As disclosed in Japanese Patent No. 76032, a detachable auxiliary handle lever for operating the steering of the traveling vehicle from outside the vehicle is attached to the pitman arm so as to extend to the front of the traveling vehicle, so that the vehicle can be operated while descending from the traveling vehicle. There was one that could be operated in the right direction.

[0004]

However, according to the above-mentioned prior art, when the auxiliary handle lever is attached to the pitman arm, the auxiliary handle lever extends only in front of the traveling vehicle body, For example, in a situation in which an operation vehicle is operated from the side of a traveling vehicle such as loading and unloading an agricultural work vehicle onto and from a carrier bed, the operation is difficult and difficult to handle. Moreover, since the height at which the operation is easy to perform differs depending on the driver, it is difficult for the driver to perform the operation.

The object of the present invention is to provide a simple and inexpensive construction,
It is to facilitate the driving of the traveling vehicle body by the auxiliary handle lever.

[0006]

In order to achieve the above object, a riding type work vehicle according to the present invention has a steering link mechanism for interlocking a steering wheel and a steering wheel that can be operated from a riding position. A mounting portion for detachably connecting an auxiliary handle lever for operating the link mechanism from outside the vehicle is provided, and a lever posture changing means for changing a vertical angle of the auxiliary handle lever is provided.

[0007]

According to the present invention, the vertical angle (height, extension direction, etc.) of the auxiliary handle lever can be adjusted according to the driver's preference and various operating conditions when the vehicle is dismounted and the steering operation is performed. ) Can be changed. For example, in the situation where the steering operation is performed from the front of the traveling vehicle body, the vertical angle is changed so that the auxiliary handle lever is upright, and the side of the traveling vehicle body is moved to the loading and unloading of the agricultural work vehicle on the loading platform of the transport vehicle. In the situation where the steering operation is performed from one side, the vertical angle is changed so that the auxiliary handle lever extends from the side of the traveling vehicle body. When the driver's preferred operating position of the auxiliary handle lever is high, the vertical angle is changed so that the operating position of the auxiliary handle lever is high, and when the driver's preferred operating position of the auxiliary handle lever is low. The vertical angle is changed so that the operation position of the auxiliary handle lever is lowered.

[0008]

According to the present invention, by changing the vertical angle of the auxiliary handle lever, it becomes possible to position the auxiliary handle lever at a position that suits various operating situations and the driver's preference. , It became easier to steer the vehicle body using the auxiliary handle lever. Moreover, for example, when the attachment portion provided on the steering link mechanism and the auxiliary handle lever are connected by a pin, a lever posture changing means for changing the vertical angle of the auxiliary handle lever can be provided in either the attachment portion or the auxiliary handle lever. By providing a plurality of common holes having different angles in the crab, the structure can be configured easily and inexpensively. Further, if the auxiliary handle lever is extended from the side of the traveling vehicle body, it becomes easy to reach the operating tool for stopping or decelerating originally provided in the traveling vehicle body, and the traveling vehicle body is stopped or decelerated. It can be advantageous. Therefore, it becomes possible to easily drive the traveling vehicle body by the auxiliary handle lever with a simple and inexpensive structure.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a riding type rice transplanter will be described below with reference to the drawings. FIG. 1 shows a side surface of a front half of a traveling vehicle body 1 of a riding type rice transplanter.
A front wheel 2 as a steering wheel is provided in the front half of the vehicle.
A gasoline engine 4 is mounted in the hood 3 of the traveling vehicle body 1. A control panel 5 on the rear of the hood 3
The operation panel 5 is provided with a steering handle 6 that can be operated from the riding position, various switches such as a key switch 7, and various instruments. As shown in FIG. 2 and FIG. 4, the steering handle 6 includes a steering shaft 8 that is rotatable integrally with the steering handle 6, various gears installed in a steering gear box 9, and a steering link mechanism 10. It is linked to the front wheel 2. The steering link mechanism 10 includes a pitman arm 11 that is rotatable integrally with a gear shaft 9 a protruding downward from the steering gear box 9, and a knuckle arm 1 that is rotatable integrally with a front wheel 2.
2. It is configured by a tie rod 13 that connects the pitman arm 11 and the knuckle arm 12. That is,
The steering force from the steering handle 6 is used to steer the front wheels 2 with the pivot point of the knuckle arm 12 as a fulcrum.

As shown in FIG. 3, the pitman arm 1
A mounting portion 15 made of a round steel material for detachably connecting an auxiliary handle lever 14 for operating the steering link mechanism 10 from the outside of the vehicle is welded to the vehicle 1, and the auxiliary handle lever 14 is attached to the mounting portion 15. A common hole 15a for inserting a pin is formed to connect with the pin 16. That is, in the case of going in and out of the field, loading and unloading of the carrier on the loading platform, and the like, the auxiliary handle lever 14 is fitted onto the mounting portion 15 and pin-connected,
The user can get off the traveling vehicle body 1 and perform steering operation.

As shown in FIGS. 1 to 4, the auxiliary handle lever 14 is composed of an operating portion 14A made of an L-shaped round steel material and a connecting portion 14B made of steel pipe material. The connecting portion 14B has a pair of two. A plurality of pin insertion holes 14a are formed at a predetermined pitch angle (for example, 30 °) centering on the tube axis center and at equal intervals along the tube axis direction. Then, the vertical angle of the auxiliary handle lever 14 can be changed by changing the pin insertion hole 14a of the connecting portion 14B that is pin-connected to the common hole 15a of the mounting portion 15 (for example, the pitch angle is 30 °). If, you can change the vertical angle in 12 different directions). That is, the plurality of pin insertion holes 14a of the connecting portion 14B, the common holes 15a of the mounting portion 15, and
A lever posture changing means A for changing the vertical angle of the auxiliary handle lever 14 is constituted by the pin 16 connecting them. In addition, reference numeral 14b in the drawing denotes a grip for preventing slipping made of a resin material.

As shown in FIG. 1, an auxiliary handle lever 1
4 is a connecting member 18 made of a round steel material, which is normally provided at a lower left portion of the step 17 of the traveling vehicle body 1 so as to project forward so as to be located at the left-right center portion of the front portion of the bonnet 3.
Of a pair of left and right wire drawing tools provided in the seedling planting device for planting several rows, which is connected to the rear part of the traveling vehicle body (not shown) so as to be lifted up and down. According to one, it is used as a sighting tool for aligning the center of the traveling vehicle body 1 with the traveling reference line scratched and formed in the planting field scene in the next step.

As shown in FIGS. 1 and 5, the engine 4
The engine mounting frame 20 bolted to the mission case 19 so as to extend forward is bolted to the engine mounting frame 20 by interposing a rubber plate 21 and a flat steel material 22 for vibration isolation between the engine mounting frame 20 and the engine mounting frame 20. ing. The rubber plate 21 is formed with a plurality of concave grooves 21a. By interposing the respective rubber plates 21 so that the concave groove 21a of the upper rubber plate 21 and the concave groove 21a of the lower rubber plate 21 are orthogonal to each other, vibration in the front-back direction and vibration in the left-right direction are dealt with. You can do it.

[Other Embodiments] The present invention is not limited to the above embodiments, and some of the other embodiments will be listed below. The riding type work vehicle may be, for example, a small tractor or a riding type lawnmower. The attachment portion 15 may be provided on any part of the steering link mechanism 10, and may be provided on the tie rod 13, for example. You may make it connect the attachment part 15 and the auxiliary handle lever 14 with a set bolt. in this case,
A hole for a set bolt may be formed in the round steel material forming the mounting portion 15, and a square steel material may be used instead of the round steel material. The mounting portion 15 may be fitted onto the auxiliary handle lever 14. In this case, the mounting portion 15 may be formed of a steel pipe material and the auxiliary handle lever 14 may be formed of a round steel material. The lever attitude changing means A may be configured by forming a plurality of common holes 15a having different pitch angles on the mounting portion 15 side, and the mounting portion 15 having a plurality of common holes 15a having different pitch angles. Alternatively, the auxiliary handle lever 14 may be configured by forming a plurality of pin insertion holes 14a having different pitch angles. Alternatively, the auxiliary handle lever 14 and the mounting portion 15 may be made of square steel or square steel pipe. As shown in FIG. 6, an annular groove 15b is provided in the round steel material forming the mounting portion 15, and the pin 16 engaged with the annular groove 15b is inserted into the steel pipe material forming the connecting portion 14B of the auxiliary handle lever 14. The lever attitude changing means A may be configured so that the auxiliary handle lever 14 can freely rotate around the axis with respect to the mounting portion 15 by forming the insertion hole 14c. In this case, the auxiliary handle lever 14 is inserted into the annular groove 15b.
You may make it provide the regulation member which regulates the rotation range. As shown in FIG. 7, the auxiliary handle lever 14 is pivotally supported by the connecting portion 14B of the auxiliary handle lever 14 so that the operating portion 14A of the auxiliary handle lever 14 can be rocked back and forth, and is drilled in the operating portion 14A. Common hole 14d
The position may be adjusted in the front-rear direction as well, by fixing the pin and one of the plurality of common holes 14e formed in the connecting portion 14B with a pin.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view showing a front portion of a riding type rice transplanter.

FIG. 2 is a front view of a steering link mechanism.

FIG. 3 is an exploded perspective view of a lever posture changing unit.

FIG. 4 is a plan view of a steering link mechanism.

FIG. 5 is an exploded perspective view of an engine mounting frame portion.

FIG. 6 is a diagram showing another embodiment.

FIG. 7 is a diagram showing another embodiment.

[Explanation of symbols]

 2 Steering wheels 6 Steering handle 10 Steering link mechanism 14 Auxiliary handle lever 15 Mounting part A Lever posture changing means

Claims (1)

[Claims] 1. A steering link mechanism (10) for interlockingly connecting a steering wheel (6) and a steering wheel (2) operable from a riding position, for operating the steering link mechanism (10) from outside the vehicle. The riding type work provided with a mounting portion (15) for detachably connecting the auxiliary handle lever (14) of (1) and a lever posture changing means (A) for changing the vertical angle of the auxiliary handle lever (14). car.