JPH0134187B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an auxiliary traveling device that enables a single-shaft tractor with a separated trailer to be self-propelled.

[Conventional technology]

When a failure occurs in the joint between the single-shaft tractor and the trailer or in the tractor itself, or when an annual inspection is performed, it is necessary to temporarily separate the tractor and trailer. Then, after repairs, inspections, etc. are completed, the two are connected again, and the conventional work method at this time is as follows.

As shown in FIGS. 8 and 9, first remove the hoses and bolts from the connecting part 3 between the single-shaft tractor 1 and the trailer 2, and then support the front end of the trailer 2 with the support member 4 and hydraulic jack 5. do. Next, while the front end of the tractor 1 is supported by a forklift 6 or a garage jack (not shown), the tractor 1 is driven forward by about 2 m, and the front end is supported by a support member. put.

When the repairs, inspections, etc. are completed, the tractor 1 is moved backward in the same manner as described above, and the connecting shaft 7 on the tractor 1 side of the connecting portion 3 is fitted into the connecting hole 8 on the trailer 2 side, so that the two are connected. . If the connecting shaft 7 and the connecting hole 8 are misaligned in the left-right direction,
While the tractor 1 is moving backward, an operator applies a pawl to either the left or right drive wheels 9 to change the direction of the tractor 1 and align them. Moreover, these vertical position adjustments are performed by a hydraulic jack 5 and a forklift 6 or a garage jack. Then, after connecting, connect each hose and install bolts.

[Problem that the invention seeks to solve]

However, in this conventional method, the connecting part 3
Since it takes time and effort to align the connecting shaft 7 and the connecting hole 8, the working time becomes long and a large number of workers are required, and a fairly large and flat work area is also required. moreover,
In order to change the direction of the tractor 1, the operator had to approach the moving tractor 1, which was very dangerous.

This invention was made based on these circumstances, and its purpose is to enable a single-shaft tractor with a separated trailer to run on its own, and also to be able to be steered by a steering wheel on the driver's seat. To provide an auxiliary traveling device for a single-shaft tractor that can freely change direction.

Another object of the present invention is to provide an auxiliary traveling device for a single-shaft tractor that can easily, safely and quickly perform the work of separating and reconnecting the tractor to a trailer, and can also perform these works even in a relatively narrow place with uneven surfaces. That's true.

[Means for solving problems]

Therefore, in order to achieve the above object, this invention
The following technical measures have been taken:

That is, it is an auxiliary traveling device for a single-shaft tractor that has a movable part that is linked to the steering handle of the driver's seat in the connection mechanism with the trailer 2, and is removably attached to the main body of the single-shaft tractor 1 and is capable of changing direction. It comprises a running wheel 10 and a steering rod 26 that is connected to a movable part of a coupling mechanism of the single-shaft tractor 1 and steers the running wheel 10, and the running wheel 10 is connected to the main body of the single-shaft tractor 1. The feature is that the distance can be adjusted.

[Effect]

With the above structure, the single-shaft tractor 1 is stably supported by the drive wheels 9 and the running wheels 10, and can travel by itself by rotationally driving the drive wheels 9.

Furthermore, when changing the direction of the running wheels 10, the steering wheel on the driver's seat may be operated. The movable part of the coupling mechanism of the single-shaft tractor 1 is configured to work in conjunction with the steering handle on the driver's seat in order to smoothly change direction when the trailer 2 is coupled. Since the running wheels 10 are steered via the steering rod 26, the direction of the running wheels 10 can be changed by operating the steering handle.

Note that the distance between the running wheel 10 and the main body of the single-shaft tractor 1 is adjustable, so when installing the running wheel 10, the distance is made small, and after the installation is completed, the distance is increased and the distance is adjusted. The ring 10 can be brought into contact with the ground.

Furthermore, if the ground is uneven, the position of the coupling mechanism such as the coupling shaft 7 may shift up and down, but even in this case, it is possible to match the coupling mechanism of the trailer 2 by adjusting the distance. It is.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 to 7 show a single-shaft tractor equipped with an auxiliary traveling device according to the present invention.

In FIG. 1, reference numeral 1 denotes a conventionally known tractor. At the rear of the main body of the tractor 1, there is provided one shaft with drive wheels 9 attached to both ends, and at the rear end there is a connection part with a trailer 2. A connecting shaft 7 is provided which constitutes 3. The connecting shaft 7 is fitted into a connecting hole 8 provided in the trailer 2 when connected to the trailer 2, and is attached to the main body of the tractor 1 via a mounting member 24. In order to smoothly change direction, this connecting shaft 7 is designed to be linked with a steering handle provided on the driver's seat, and when the steering handle is operated, it rotates around a vertical axis.

Two running wheels 10 constituting a part of an auxiliary traveling device are attached to the front end of the main body of the tractor 1, and the driving wheels 9 and the running wheels 10 move the tractor 1
can run on its own.

Each running wheel 10 is rotatably attached to both ends of a frame 11, as shown in FIGS. 2 and 4. A cylindrical body 12 in which a supporting inner cylinder 13 is fitted is erected at the center of the frame 11.
The inner cylinder 13 has a hydraulic jack 14 provided therein.
Since the inner cylinder 13 is raised and lowered by the hydraulic jack 14, the height of the inner cylinder 13 can be adjusted by the hydraulic jack 14. The upper end of the inner cylinder 13 is closed to form a flat support part 15, and the periphery of the support part 15 has four
Bolt holes 16 for connections are provided. Furthermore, one ends of two L-shaped connecting members 17 are fixed to the rear side surface of the frame 11. Each connection member 1
The other end of 7 is connected to a connecting shaft 7 provided at the rear end of the main body of the tractor 1 via a steering rod 26 and a threaded bolt 30, as will be described later.

The running wheel unit configured as described above has a second
It is fixed to the main body of the tractor 1 as shown in the figure.

That is, in the center of the front end of the tractor 1 body,
Two chevron-shaped protrusions 18 are arranged vertically in parallel,
A support shaft 19 is erected through both protrusions 18 so as to be rotatable and movable up and down. At the lower end of the obstruction shaft 19, as clearly shown in FIG.
A connecting plate 20 having almost the same shape as the support part 15 of the inner cylinder 13 provided on the running wheel unit is fixed,
Four bolt holes 21 are provided on its periphery at positions corresponding to the bolt holes 16 of the inner cylinder 13.

Therefore, the support portion 15 at the upper end of the inner cylinder 13 of the frame 11 that supports the running wheel 10 is connected to the support shaft 19.
Butt them from below so that they overlap the connection plate 20 at the lower end, and insert the bolts 22 into the corresponding bolt holes 16 and 21.
The running wheel unit is attached to the support shaft 19 by passing through the nut 23 and tightening it with a nut 23. In this way, the running wheel 10 is rotatably attached to the main body of the tractor 1 about the support shaft 19. When removing, loosen the nut 23 and insert the bolt 22 into each bolt hole 16, 2.
Just pull it out from 1.

As shown in FIGS. 5 to 7, the connecting shaft 7 constituting the connecting mechanism of the tractor 1 is attached to the rear end of the main body of the tractor 1 by a mounting member 24 so as to be rotatable in the horizontal direction. This mounting member 2
Two brackets 25 for connection are fixed to the lower surface of 4. One end of two steering rods 26 is attached to an engaging member 27 rotatably attached to each bracket 25, respectively. Further, at the other end of each steering rod 26, a cylindrical portion 28 having a thread formed on the inner surface is provided.
One end of a screw bolt 30 is screwed into the screw 8.
At the other end of each threaded bolt 30, an engaging member 29 is provided.
is attached, and via this engaging member 29,
It is rotatably connected to the tip of an L-shaped connecting member 17 attached to the frame 11.

In this way, the steering rod 26 and the threaded bolt 30 provided below the main body of the tractor 1 connect the running wheels 10 and the connecting shaft 7, and when the connecting shaft 7 is rotated in the horizontal direction, The direction of the running wheel 10 can be changed.

The connecting shaft 7 is designed to be rotated by operating a steering handle on the driver's seat of the tractor 1, so that the running wheels 10 can be steered by operating the steering handle. is possible.

Next, a situation will be described in which the trailer 2 is separated from the tractor 1 to which the auxiliary traveling device configured as described above is attached, and then the separated trailer 2 is reconnected.

First, before separating the tractor 1 and the trailer 2, the worker butts the support part 15 of the frame 11 of the running wheel unit against the connection plate 20 of the support shaft 19 attached to the main body of the tractor 1, and inserts each bolt hole 16, 21 through bolt 22 and nut 2
Tighten at step 3 and install the running wheel unit.
At this time, the height of the inner cylinder 13 is lowered by the hydraulic jack 14 so that the running wheel 10 does not touch the ground.

Next, the engaging member 27 attached to one end of the steering rod 26 is connected to the bracket 25 attached to the mounting member 24 of the connecting shaft 7, and the engaging member 29 attached to the threaded bolt 30 is connected to the running wheel. Connect to the L-shaped connecting member 17 of the unit. Then, by screwing one end of the threaded bolt 30 into the cylindrical portion 28 of the steering rod 26, the installation of the auxiliary travel device is completed.

Subsequently, the hydraulic jack 14 of the running wheel unit is operated to increase the height of the inner cylinder 13 and bring the running wheel 10 into contact with the ground. Thereby, the tractor 1 is stably supported by the drive wheels 9 and the running wheels 10.

Therefore, the connection between the connection shaft 7 and the connection hole 8 of the trailer 2 is released. In this way, tractor 1
is separated from the trailer 2, and has driving wheels 9 and running wheels 10.
Therefore, if a worker gets on the tractor 1 and drives the drive wheels 9 to move the tractor 1 forward, the two can be easily separated.

To change the direction of the tractor 1 after separation, the driver of the tractor 1 only needs to operate the steering handle on the driver's seat. Movement of the steering wheel is controlled by the running wheels 10 via the mounting member 24 and the steering rod 26.
is transmitted and its direction is changed.

In order to reconnect the tractor 1 and the trailer 2, the tractor 1 may be moved backward toward the trailer 2, and the connecting shaft 7 may be fitted into the connecting hole 8 forming the connecting mechanism of the trailer 2. After connecting,
After operating the hydraulic jack 14 again to lift the running wheel 10 off the ground, the steering rod 26, threaded bolt 30, and running wheel 10 unit are removed.

Incidentally, if it is necessary to adjust the height of the connecting shaft 7 at the time of reconnection, this can be easily done by operating the hydraulic jack 14.

〔Effect of the invention〕

As is clear from the above description, according to the auxiliary travel device according to the present invention, the following effects can be obtained.

That is, since the single-shaft tractor 1 with the trailer 2 separated is stably supported by the drive wheels 9 and the running wheels 10, it can move by itself by driving and rotating the drive wheels 9, and the running wheels 10 is
Via the steering rod 26 and movable parts of the coupling mechanism such as the mounting member 24, the direction can be freely changed using the steering handle on the driver's seat.

Therefore, when separating and reconnecting the trailer 2, the driver gets on the single-shaft tractor 1, and after separation, the forklift can drive itself away from the trailer 2. This not only eliminates the need for other equipment, but also eliminates the need for workers to approach the moving tractor 1.
Furthermore, there is no fear that the tractor 1 will be unsupported by the equipment during movement.

Furthermore, if the positions of the connecting shaft 7 of the tractor 1 and the connecting hole 8 of the trailer 2 are shifted in the horizontal direction, you can easily and accurately align them by operating the steering wheel on the driver's seat to change the direction. If the vehicle is shifted vertically, the single-shaft tractor 1
By adjusting the distance between the main body and the running wheel 10, they can be easily matched.

As described above, according to the auxiliary traveling device of the present invention, the separation and reconnection work of the trailer 2 can be performed easily, safely and quickly, and the work time and number of workers can be reduced. .

Further, in the auxiliary traveling device of the present invention, since the distance between the main body of the single-shaft tractor 1 and the running wheels 10 can be adjusted, it is easy to align the coupling mechanism between the two even in an uneven place. No other equipment is required. Therefore, these operations can be carried out not necessarily in a flat place, but also in a relatively narrow place.

Furthermore, when separating the trailer 2, if the distance between the main body of the single-shaft tractor 1 and the running wheels 10 is made small, the running wheels 10 will not come into contact with the ground, and the mounting of the running wheel unit on the main body of the single-shaft tractor 1 will be made easier. Another advantage is that it can be easily performed. This also applies when the running wheel unit is removed after reconnection.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a single-shaft tractor equipped with an auxiliary traveling device according to the present invention. FIG. 2 is a partially enlarged view showing how the running wheels are mounted. FIG. 3 is a perspective view of the bearing shaft. FIG. 4 is a perspective view of the frame and running wheels. FIG. 5 is a partial side view of a single-shaft tractor. FIG. 6 is an explanatory plan view showing a steering mechanism for running wheels. FIG. 7 is a diagram similar to FIG. 6, showing a state in which the running wheels are rotated to the right. FIG. 8 is a side view showing a state in which a single-shaft tractor and a trailer are connected. FIG. 9 is a side view showing a conventional working state when a single-shaft tractor is separated from a trailer and then reconnected. 1...Single-shaft tractor, 2...Trailer, 3...
Connection portion, 7...Connection shaft, 8...Connection hole, 9
. . . Drive wheel, 10 . ...Supporting shaft, 24...Mounting member,
25...Bracket, 26...Steering rod, 2
7, 29...Engaging member, 28...Cylindrical portion, 30...
...Threaded bolt.

Claims (1)

[Scope of Claims] 1. An auxiliary traveling device for a single-shaft tractor that has a movable part that is linked to a steering handle on a driver's seat in a coupling mechanism with a trailer, the auxiliary traveling device being removably attached to the main body of the single-shaft tractor. a convertible running wheel; and a steering rod connected to a movable part of a coupling mechanism of the single-shaft tractor to steer the running wheel, the running wheel adjusting a distance from the main body of the single-shaft tractor. An auxiliary traveling device for a single-shaft tractor, characterized in that it is possible.