JP2556108Y2 - Tractor towed towed 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 tractor for towing a towed agricultural work machine such as a trailer, a wagon, a vacuum car, a manual spreader, etc., and particularly to a connection structure thereof.

[0002]

2. Description of the Related Art Conventionally, there is a tractor that pulls a towed agricultural work machine as shown in FIG. 8 or FIG .

FIG . 8 shows a construction in which a tow rod 4 of a towed agricultural work machine 3 is directly towed by a hitch 2 provided near a rear wheel 1, 1 of a tractor. In this configuration, the difference between the inner wheels of the tractor and the towed agricultural work machine is large. Therefore, when the turning radius is reduced, the rear wheel 1 of the tractor comes into contact with the towing rod 4, so that the turning radius increases. .

FIG. 9 shows a configuration in which a towing rod 4 of a towed agricultural work machine 3 is towed by a link type drawbar 5 provided at a rear portion of a tractor. Since the connection between the drawbar 5 and the towing rod 4 is performed via the alligator hitch 6, the turning angle of the towing rod 4 relative to the drawbar 5 has a limit. This
Has a larger turning angle than the tractor that pulls the work machine in FIG. 7 , so the turning radius is slightly smaller ,
The inner ring difference increases.

[0005] The working machine described in Japanese Utility Model Publication No. 1-90309 has a structure in which the wheels of the towed working machine are oriented in the opposite direction to the steering of the tractor handle. Although this working machine has a small inner wheel difference, the turning angle cannot be reduced to 90 ° since the link type drawbar and the alligator hitch hit.

[0006]

[Problems to be solved by the invention] A towed agricultural work machine often works in a narrow place such as an orchard or a house. In such a place, the turning radius is small so that the work can be easily performed. There is a need for a tractor that pulls a work machine with a small difference.

Therefore, in the present invention, the tractor and the towed
Inner difference between agricultural machine is extremely small, and Ru can be pivoted minimum turning radius without the tractor and the towed agricultural machine interference, there is provided a tractor towing a towed agricultural machine.

[0008]

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an intermediate position between a rear wheel axle of a tractor and a wheel axle of a towed agricultural machine towed by the tractor.
At an equal or nearly equal distance from both wheel axes
A turning point at the time of turning .

[0009]

[Function] Since the present invention has the above-mentioned structure , the inner ring difference between the tractor and the towed agricultural work machine is eliminated.
It becomes extremely small, and the turning angle can be made 90 degrees or more .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a tractor 10 is provided with a towed agricultural work machine 11 (hereinafter simply referred to as a work machine).
The work equipment 11 is towed by being connected to a lower link 12 attached to a rear portion of the work machine 11 to be rotatable in a horizontal direction.

The tractor 10 has two pairs of wheels 14 and 15, and the work machine 11 has a pair of wheels 16 at the rear. The tow rod 13 is mounted on the lower surface of the bed of the work machine 11 at a position intermediate between the axis of the rear wheel 15 of the tractor 10 and the axis of the wheels of the work machine so as to be pivotable in the horizontal direction. here
Then, the length A from the pivot axis (bending point) E of the towing rod 13 to the axis of the rear wheel 15 of the tractor 10 and the towing rod 13
Is equal to the length B from the turning axis E to the axis of the wheel 16 of the work machine 11.

As shown in FIG. 6, the mounting structure of the towing rod 13 is such that one end of the towing rod 13 is rotatably mounted via a bush 21 around a pin 20 protruding from the lower surface of the bed of the working machine 11. It is a thing.

The connection of the towing rod 13 to the lower link 12 has the structure shown in FIGS. That is,
A drawbar 23 is attached to the rear end of the forked lower link 12, a through hole 24 is formed in the center of the drawbar 23, and a connecting shaft 25 is inserted and fixed in the through hole 24 so as to project rearward. I have. Holes 26 penetrating up and down are formed at portions protruding rearward of the connection shaft 25 at appropriate intervals in the front-rear direction.

A hollow collar 27 having the same axis is attached to the tip of the towing rod 13, and the collar 27 has an inside diameter into which the connecting shaft 25 can be inserted. The rear end of the upper collar 27 has a window 29, the window 29
One of the plurality of holes 26 provided in the connection shaft 25 by utilizing
The pin 28 can be inserted into the The pin 28 contacts the rear edge of the collar 27 to prevent the connecting shaft 25 from coming off . By changing the insertion position of the pin 28, the lower link 1
2 Adjust the distance D to the tip (FIGS. 1 and 2) . This you differ by a tractor, a wheel 15 after the tractor 10
Distance C from the axis to the tip of lower link 12 (FIG. 1,
The reason why the dimension of A changes due to 2) is to maintain the relation of A = B by adjusting the dimension of D.

The case where the lower link 12 of the tractor is used has been described. FIG. 7 shows the case where the hitch of the tractor is used. When a hitch is used, the tip of the tow rod 13 is connected to the hitch 30 with a hitch pin 31 penetrating in the vertical direction. However, turning horizontally at this connection point makes it impossible to tow the work machine. Towing rod 13
Are provided with a pair of stoppers 32 projecting so as to hold the hitch 30 from the left and right.

Although it is desirable that the relationship of A = B is accurate, A and B may have slightly different dimensions .

Since the present invention has the above configuration, as shown in FIG. 2, when the tractor 10 makes a curve, the working machine 11 turns around the turning point E and follows the turning point. Since A = B, the tractor does not come into contact with the work implement, and since there is no inner wheel difference between the rear wheel of the tractor and the wheels of the work implement, the turning radius of the tractor is reduced.

Further, even if the tractor is turned so that the turning angle exceeds 90 degrees, the turning radius can be reduced as shown in FIG.

In FIG. 3, X represents an occupied width required for turning the tractor, and Y represents an occupied width required for turning the towing vehicle.

[0020]

[Effect] Since the present invention has the above configuration, there is almost no difference in the inner race between the tractor and the towed agricultural work machine.
The tractor has a minimum turning half
Can pivot in diameter, within a narrow house width, orchards Ueki planted, it is possible to easily tow work in a narrow farm road, its utility value are those large becomes.

[0021]

[Brief description of the drawings]

FIG. 1 is a side view of the present invention;

FIG. 2 is an explanatory view of a turning state of the present invention,

FIG. 3 is an explanatory view of a turning state of the present invention,

FIG. 4 is a plan view of the connection structure between the lower link and the towing rod according to the present invention;

FIG. 5 is a longitudinal sectional side view of FIG. 4;

FIG. 6 is a partial longitudinal side view showing a turning portion of the towing rod,

FIG. 7 is a plan view of a connecting structure between the tow rod and the hitch according to another embodiment of the present invention;

FIG. 8 is an explanatory view showing a turning state of a tractor towing a conventional working machine,

FIG. 9 is an explanatory view showing a turning state of a tractor towing a conventional working machine,

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Tractor 11 ... Work machine 12 ... Lower link 13 ... Traction rod 15 ... Rear wheel 16 ... Work machine wheel E ... Bending point

Claims (1)

(57) [Scope of request for utility model registration] 1. An intermediate position between a rear wheel axle of a tractor and a wheel axle of a towed agricultural work machine towed by the tractor.
At an equal or nearly equal distance from both wheel axes
A tractor for towing a towed agricultural work machine, wherein the tractor is provided with a turning point when turning .