JPS6044183B2 - Driving device for traveling power vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving device for a traveling motive vehicle, such as a wheeled tractor.

For moving vehicles such as tractors that can move forward and backward, it is possible to attach work equipment, tools, etc. to the front or rear of the driver depending on the purpose of the work, but in this case, along with the seat. The control device constituting the driving device is usually provided for forward movement.

Therefore, when a work implement or the like is attached to the rear of the vehicle body via, for example, a three-point link, and the vehicle is exclusively used for backward movement, the steering of the vehicle becomes unstable.

Therefore, some proposals have been made to provide a reverse control device separate from the forward control device for exclusive use of reverse operation, but with conventional such control devices, reverse operation is the opposite of forward operation, and only forward operation is possible. Because there are many opportunities to drive by feeling, driving backwards can sometimes be dangerous.

The present invention has been devised in view of the above-mentioned circumstances, and its main purpose is to make so-called backward driving intuitively the same as forward driving, even when the forward/backward driving operation is a reverse operation. This eliminates the danger of driving and working.

Another object of the present invention is to effectively utilize the existing forward control device and its steering linkage system to enable backward operation with a simple structure. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, a traveling power vehicle 1 shown as a tractor includes a front traveling device 2 used for steering and a rear traveling device 3 used for driving in the embodiment. It is equipped with 2 axles and 4 wheels.

Note that the traveling device 2 can also drive this. Further, the traveling devices 2 and 3 may be of a two-axle and three-wheel type, a crawler type, or the like. An engine 4 is mounted on the front of the traveling power vehicle 1, and the rotational power of the engine 4 is transmitted to the rear traveling device 3 or the front and rear traveling devices 2, 3 through a transmission device (not shown) so that the vehicle can move forward and backward.

Usually, the transmission device is built into a transmission case 5 connected to the engine 4, and the case 5 constitutes a vehicle body 6 in the embodiment.

Of course, the vehicle body 6 may be a so-called chassis frame.
In the embodiment, a forward control device 7 is provided as a handle type in a rearwardly tilted manner in the central portion of the vehicle body 6 in the longitudinal direction, and a driver's seat 8 is provided at a position opposite to the rear of the control device 7. The driver's seat 8 is provided on the vehicle body 6, but in the embodiment, a fifth seat is provided on the hydraulic system 9 for lifting and lowering the working machine via a direction change support device 10.
It is provided as detailed in the figure.

The direction change support device 10 allows the driver's seat 8 to rotate around a vertical axis 11, and includes positioning means including a ball 12, a spring 13, and the like. The forward control device 7 has a handle column 1 and a male handle shaft 15, an example of which is shown in FIG.
, includes a handle wheel 17 etc. provided on the handle shaft 15 via a fastening means 16, and for example, by operating the handle wheel 17, the handle shaft 15, the sector gear device provided at the bottom thereof, the Bitman arm, the drag link, etc. The traveling device 2 is linked via the steering system.

This steering system may be the aforementioned mechanical transmission body or hydraulic transmission body, but in FIG.
A steering interlock system 21 consisting of the following is illustrated.

Separately from the forward control device 7, a reverse control device 22 is provided at the rear of the vehicle body 6 as illustrated in FIGS. The embodiment shows the same handle shape as for forward movement.

Incidentally, since the constituent members of the reverse operation control device 22 are the same as those for forward operation, they are indicated by the same reference numerals in FIGS. 3 and 4. In the first embodiment shown in FIG. 1 to FIG.
The control devices 7 and 22 are connected to each other by a transmission means 26 by suspending a winding endless body 25 bypassing the side of the driver's seat 8 through a guide sheave 24 etc. shown in FIG. This transmission means 26 changes the steering direction from front to back by intersecting the endless body 25, for example.

The transmission means 26 of the first embodiment has a third winding device 23.
As shown in FIG. 4, a rotational support shaft 29 coaxial with the handle shaft 15 is fixed to the spokes 27 via a fitting 28, and a pulley 30 is removably attached to this rotational support shaft 29 by means such as a spline or a key. A case 32 having a central structure is provided on the rotating support shaft 29 via a bearing 31 so as to be relatively rotatable.

Further, as shown in FIG. 4, the case 32 has a conductive portion 33 of the endless body 25, and a cylindrical connector 34 is screwed to this, and an endless body guide outer cylinder 35 is provided via the cylindrical connector 34. The outer cylinder 35 is preferably fixed to the vehicle body 6 side. The endless body 25 is inserted into the outer cylinder 35 and wound around the outer peripheral groove of each pulley 30 multiple times, and its terminal end is fixed to the pulley 30 by a connector device 36 shown in FIGS. 6 to 8.

In FIG. 1, reference numeral 37 indicates a fork as an example of a rear-loading working machine and a working tool, which is mounted in a manner that it can be raised and lowered via a three-point link 38 and is also detachable.

Therefore, in the first embodiment described above, when a front work machine (not shown) such as a front loader or a dozer is attached to the traveling power vehicle 1, the driver's seat 8 faces forward and the steering device 7 is used to steer the vehicle. Forward work is performed while steering the traveling device 2 via the transmission system 21.

At this time, since the control device 22 is connected via the transmission means 26, the operator is accompanied by the operator, but this does not substantially impede the work. However, in order to avoid the difficulty of maneuvering, for example, the endless body 25 may have a spliced structure and the portions thereof may be separated. Next, in order to exclusively carry out reverse work with the rear-mounted work machine 37, the driver's seat 8 is turned backward via the direction change support device 10, and the work machine 37 is visually inspected or the work situation is checked using the control device 22. Work while checking this. At this time, in order to steer the power vehicle 1 from side to side, turn the handle wheel 17 of the control device 22 to the left or right. This turning force is transmitted via the transmission means 26 to the control device for forward movement. 7, the traveling device 2 is steered to the left or right via a steering transmission system 21.

At this time, since the steering direction of the transmission means 26 is changed from front to back, even when driving backwards, the vehicle can be operated with the same feeling as when driving forwards. Incidentally, the endless body 26 of the first embodiment is, of course, provided in such a way that it does not interfere with getting on and off the vehicle.

Furthermore, the pulley 30 of the first embodiment may be fixed to the handle shaft 15 below the wheel 17.
According to the present invention, the forward and reverse operation devices are linked and connected by the endless wrapping body, so the structure is simplified, and moreover, the endless wrapping body bypasses the side of the driver's seat. This makes it easy to drive and easy to install and remove, making it easy to convert an existing forward-moving vehicle into a forward- and reverse-moving vehicle. In addition, you can drive while visually checking the work equipment installed in the front or rear depending on the purpose of the work, and even when driving backwards, the feeling of control is the same as driving forwards, making it safe and secure. It has the advantage of being able to guarantee the

[Brief explanation of the drawing]

1 to 8 show a first embodiment of the present invention, FIG. 1 is a side view of the overall configuration, FIG. 2 is a plan view, FIG. 3 is a sectional view of the control device, and FIG. 4 is a side view of the overall configuration. Plane sectional view of the main part, No. 5
6 is a detailed view of the endless body terminal portion shown in FIG. 4, and FIGS. 7 and 8 are plan views of two examples of the endless body terminal portion. 1... Traveling power vehicle, 2... Traveling device,
7... Forward control device, 21... Steering transmission system, 22... Reverse control device, 26...
...Transmission means.

Claims (1)

[Claims] 1 In a traveling power vehicle equipped with a forward control device 7 and a reverse control device 22 via the driver's seat 8 in the front and rear, winding devices 23 and 2 are attached to both the forward and reverse control devices 7 and 22, respectively.
3 is provided, and both control devices 7 are provided between both winding devices 23, 23.
, 22 are rotated in opposite directions to each other.
A driving device for a traveling power vehicle, characterized in that it is hung so as to bypass the sides.