JPS6258683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lateral vibration prevention device for a working machine, which is attached to the lower abdomen of a moving vehicle body so as to be able to rise and fall through a pair of left and right bending link mechanisms that are bendable around the front and back axis. This is a work machine that prevents sideways vibration when working on slopes or turning at high speed, so that work can be carried out safely and efficiently.

There are various mounting styles for working machines for mobile vehicles such as tractors, and for example, a mid-mount system is adopted for working machines such as mowers. Further, in the mid-mount system, as shown in Fig. 1, a mounting frame 2 is provided on the lower abdomen of the tractor body 1, and a bending link mechanism 3 that can be bent around the front and rear axis is provided at both left and right ends of this mounting frame 2. It is conceivable that the mower 4 is attached to the tractor body 1 via the pair of bending link mechanisms 3 so as to be movable up and down. In this case, the mower 4 has gauge wheels 5 at the front and rear, respectively,
During work, the mower 4 moves up and down following the undulations of the ground, but when working on an incline as shown in the figure, each bending link mechanism 3 can bend freely around the front and back axis, so the mower 4 as a whole is low. The vehicle moves to the side, and is in a state of lateral oscillation with respect to the tractor body 1. Similar lateral vibration also occurs when turning at high speed. If such lateral vibration occurs, the mower 4 and the wheels, especially the rear wheels 6, may come into contact with each other, or the mowing position may shift, resulting in uncut areas, which may impede efficient work. be.

The present invention solves these conventional problems, and its feature is that a working machine located between the front and rear wheels of the moving vehicle body is installed in the lower abdomen of the moving vehicle body by a pair of left and right bending wheels. It is attached so that it can be raised and lowered via a link mechanism. It has a lower link which is pivotably bent around the longitudinal axis at the lower end and whose lower end is pivoted to the working machine, and between the moving vehicle body and the working machine, there is a link between the left and right bending link mechanisms. A single lateral vibration prevention means is installed, and the lateral vibration prevention means is fitted to an upper shaft installed below from the moving vehicle body and an upper shaft installed vertically from the work machine so as to be relatively movable in the vertical direction. and a lower axis that is aligned.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIGS. 2 and 3, reference numeral 10 denotes a tractor body, which has front wheels 11 and rear wheels 12. Reference numeral 13 denotes a mid-mount mower, which includes a mower frame 14, a plurality of cutting blade bodies 15 rotatably provided around a vertical axis, and a gauge wheel 16, and front and rear wheels 11,
12, it is attached to the lower abdomen of the tractor body 10 via a pair of left and right bending link mechanisms 17 so as to be able to rise and fall freely. Note that each cutting blade body 15 is connected to the universal joint shaft 1 by the front power take-off device 18 of the tractor body 10.
9. Each bending link mechanism 17 is made up of a pair of front and rear upper links 20 and lower links 21 that are bendably connected by a front and rear connecting shaft 22, and each upper link 17 is attached to the tractor body 1 in an outwardly projecting manner. The lower links 21 are pivotally connected to the outer ends of the mounting frames 23 so as to project outwardly, and the lower links 21 are respectively pivotally connected to the mower frame 14 side. A pair of left and right lifting cables 24 are connected to the mower frame 14, and each of the lifting cables 24 is connected to a bell crank 2 which is pivotally supported on a mounting frame 23 by a pivot 25, as shown in FIG.
6 and an interlocking rod 27 connected to the bell crank 26, the mower 13 is connected to each lift arm of a hydraulic system mounted on the rear of the tractor body 10. It can be raised and lowered. 28 is a blocking means that allows the mower 13 to move up and down and prevents the mower 13 from swinging sideways;
It is provided between the tractor body 10 and the mower frame 14 at the lateral center of the rear side of the tractor 3. The blocking means 28 is connected to the vehicle body 10 as shown in FIG.
A guide cylinder 29 shown as an upper shaft installed below the
and a steadying rod 30 shown as a lower shaft which is erected from the mower 13 and is loosely fitted into the guide cylinder 29 in the axial direction, that is, in the vertical direction so as to be relatively slidable. The anti-shake rod 30 is mounted on the mounting frame 23 via a mounting plate 31, and is pivotally connected to a bracket 33 on the mower frame 14 via a longitudinal pivot shaft 32 so as to be swingable from side to side.

In the above configuration, when mowing work is performed using the mower 13, the mower 13 is operated as shown in FIG.
3 is lowered, and with the gauge wheel 16 in contact with the ground, the tractor body 10 is driven forward while each cutting blade body 15 is driven by the power from the front power extraction device 18. At this time, since each bending link mechanism 17 can bend only around the longitudinal axis, the mower 13 follows the undulations of the ground while the bending link mechanisms 17 bend and extend, and the tractor body 1
0, so the rotating cutting blade body 1
5 allows a predetermined reaping operation. More 1
When the mower 3 moves up and down following the ground, the steadying rod 30 only slides vertically relative to the guide cylinder 29, and does not interfere with the up and down movement of the mower 13. In other words, since the guide cylinder 29 and the steadying rod 30 are slidably fitted loosely, and the steadying rod 30 is pivotally attached to the mower frame 14, there is some play in this part, and the bending link The smooth bending and stretching movement of the mechanism 17 is not impaired.

When working on a slope or turning at high speed, the mower 13 tends to move due to force in the lateral direction, but the steadying rod 30 on the mower frame 14 side
are fitted into the guide cylinder 29, and are restrained and prevented by these, so the mower 13 only moves slightly laterally within the above-mentioned play range, and does not cause large lateral vibrations as in the conventional case. There is no, therefore,
It is possible to prevent contact between the mower frame 14 and the rear wheels 12, and it is also easier for the driver to control the travel trajectory of the mower 13, thereby preventing the occurrence of uncut leaves, etc.
Safe and efficient work is possible.

Note that the guide cylinder 29 of the blocking means 28 and the steadying rod 30 may be provided upside down. Further, the configuration of the blocking means 28 is not limited to the above embodiment. The working machine may be raised and lowered by a wire (Bowden cable) or the like.

In the present invention, a lateral vibration prevention means is provided between the moving vehicle body and the working machine to allow the working machine to move up and down and prevent it from lateral vibration, so that the working machine can be used when working on slopes or when turning at high speed. It is possible to prevent sideways vibration and work can be done safely and efficiently. Furthermore, the bending link mechanism, lifting mechanism, etc. are not burdened with undue stress, and their durability is improved. Particularly, in the present invention, the lateral vibration prevention means is located between the left and right bending link mechanisms, and the means is arranged vertically on the upper shaft installed below from the moving vehicle body and on the upper shaft installed upright from the working machine. Since it has a lower shaft that is fitted so as to be relatively movable, even though there is only a single lateral vibration prevention means, it is possible to effectively prevent the work equipment from lateral vibration in the left and right direction, and the lateral vibration prevention means be single,
Since the configuration is as described above, the structure is simple. Furthermore, since the upper end of the upper link of each bending link mechanism is pivotally attached to the part that extends outward from the moving vehicle body, this is compared to a case where the upper end of the upper link is pivotally attached to the lower surface of the moving vehicle body. This increases the ground clearance when lifting the work equipment. Further, when the working machine is removed from the moving vehicle body, when the upper link is removed from the moving vehicle body, the upper link and the lower link can be lowered and bent while being stacked one on top of the other. Therefore, even though the upper end of the upper link is pivotally connected to the part that extends outward from the moving vehicle body, when the upper link is removed from the moving vehicle body, the work equipment or The bending link mechanism can be easily placed on the work machine in a folded state without moving the mobile vehicle body, and the bending link mechanism fits well, allowing the bending link mechanism and various types on the work machine to be easily placed on the work machine. There is also less risk of interference between parts.

[Brief explanation of the drawing]

Fig. 1 is a schematic back view showing a comparative example, Fig. 2 is a partially cutaway side view showing an embodiment of the present invention, Fig. 3 is a schematic back view of the same, and Fig. 4 is an enlarged view of the same essential parts. be. DESCRIPTION OF SYMBOLS 10... Tractor body, 13... Mid-mount mower, 14... Mower machine frame, 17... Refraction link machine frame, 28... Blocking means, 29... Guide cylinder body, 30...
Steady rod.

Claims (1)

[Claims] 1. A working machine located between the front and rear wheels of the moving vehicle body is attached to the lower abdomen of the moving vehicle body so that it can be raised and lowered via a pair of left and right bending link mechanisms, and each bending link mechanism is
An upper link whose upper end is pivotally attached to a portion extending outwardly from the moving vehicle body and protrudes outward, and an upper end which is pivotably attached to the lower end of the upper link so as to be bendable around an axis in the longitudinal direction. and a lower link whose lower end is pivotally connected to the work equipment, and a single lateral vibration prevention means is interposed between the moving vehicle body and the work equipment, and is located between the left and right bending link mechanisms. The vibration prevention means is characterized in that it has an upper shaft installed below from the moving vehicle body, and a lower shaft installed upright from the work equipment and fitted to the upper shaft so as to be relatively movable in the vertical direction. Side shake prevention device.