JPS6153489B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support link mechanism for a snow removal device such as an auger or a blower of a snow removal vehicle.

Conventionally, as shown in FIG. 1, arms (links) 2, 2 to which the snow removal device 1 is attached are pinned to the front of the vehicle body 3a of the snow removal vehicle 3, as shown in FIG. It is known that the snow removal device 1 is made to be able to move up and down by being coupled together.

By the way, when the snowplow 3 having this type of support arm (link) mechanism is run to remove snow, the running resistance applied to the front of the snow removal device 1 due to the snow is transferred through the arms 2, 2 with lowered tips. This causes a moment about the center of gravity G to be generated in the vehicle body 3a. However, in the conventional snowplow 3 as described above, the arm 2
Since the attachment position to the vehicle body 3a is at the front of the vehicle body 3a, the above-mentioned moment becomes large. If the snow removal work continues under such a large moment, as the snow removal work progresses, the snow removal vehicle 3, which was positioned horizontally on the road surface, will gradually climb onto the snow as shown in Figure 2. However, there is a problem that the finish of the snow removal surface becomes poor.

Moreover, such a problem is remarkable in the snowplow 3 that uses a crawler as a running device, and the snowplow 3 that has climbed onto the snow is repeatedly backed up.
The current situation is that snow removal work from the same location is repeated over and over again.

This invention was made based on the above background, and the base end of the arm supporting the snow removal device is pivotally connected to a spherical bearing near the center of gravity of the vehicle body, thereby reducing the moment around the center of gravity caused by running resistance due to snow. A snowplow device support link mechanism for a snowplow that prevents the vehicle body from lifting by placing the point of action near the center of gravity of the vehicle body, and also improves the finish of the snow removal surface by changing the tilt angle of the snowplow device. The purpose is to provide.

The present invention will be explained below with reference to the drawings.

3 to 10 show an embodiment of the present invention, in which 10 is a snowplow that runs on crawlers 11, and a body 10a of this snowplow 10.
An arm (link) 13 with a snow removal device 12 such as an auger H or a blower attached to one end 13a is located inside the vehicle body 10a near the center of gravity G of the vehicle body 10a.
3b is rotatable up and down and left and right by a spherical bearing 14 shown in FIG. It is pivotally mounted to be rotatable about a center line along the width direction. The arm 13 has two plate-shaped arm plates 13c and 13c arranged parallel to each other with their sides facing each other.
5 and a connecting rod 16,
The recess 10b is formed from the lower part of the front surface 10c of the vehicle body 10a to the vicinity of the center of gravity of the vehicle body 10a, and the base end 13b thereof is housed in the concave portion 10b, and one end 13a thereof is provided at the front of the vehicle body 10a. The spherical bearing 14 is attached to the vehicle body 10 on both side walls of the recess 10b.
One end of the rod 14a connected to the spherical bearing 14 is inserted into the hole 15a in the center of the connecting plate 15. At the same time, nuts 18, 18 are attached to one end of the rod 14a.
The arm 13 is pivoted near the center of gravity of the vehicle body 10a by screwing into the arm 13.

Hydraulic cylinders 19, 19 are attached to the front surface 10c of the vehicle body 10a above the arm plates 13c, 13c so as to be rotatable up and down with pins 20, 20, and the piston rod 19a of the hydraulic cylinder 19 is The tip is the 9th
It is connected to an arm plate 13c via a spherical bearing 21 and a pin 21a shown in the figure so as to be rotatable up and down and left and right, and by operating the hydraulic cylinder 19, the arm 13 can be raised and lowered by a predetermined angle up and down. I'm starting to be able to do it. The hydraulic cylinders 19, 19 can be operated separately or simultaneously by a control device (not shown) in the snowplow 10, and the auger can be operated by adjusting the movement in and out of the piston rod 19a. Tilt angle θ between the widthwise base of H and the road surface R
(shown in FIG. 10) can be adjusted.

And, near the attachment part of the snow removal device 12 on the one end 13a of the arm 13, there are two leg parts 22a and 2.
An arm stopper 22 having a diameter of 2a connects these legs 22a, 22a to arm plates 13c, 13 via pins 23, 23 and brackets 24, 24.
c, so that it can freely rotate up and down, and its rotation surface is parallel to the length direction of the arm 13. Further, a stop rod 22b is erected at the center of the arm stopper 22, and the upper end of the stop rod 22b is inserted into a guide frame 25 protruding from the front surface 10c of the vehicle body 10. The range of rotation around the center line along the direction is restricted.

On the other hand, the vehicle body 10 in the recess 10b of the vehicle body 10a
A stop member 26 made of an elastic material such as rubber is fixed to the opening on the front side 10c. The stop member 26 is positioned at a predetermined position in the opening of the recess 10b so that it is always located laterally between the upper and lower sides of the arm 13 when the arm 13 rotates up and down around the spherical bearing 14. is fixed.

Next, the operation of the snow removal device support link mechanism of the snow removal vehicle according to the present invention configured as described above will be explained.

In order to perform snow removal work using the snow removal vehicle 10 according to the present invention, the snow removal device 12 is connected to a hydraulic cylinder 19,
19 to lower it along the road surface as shown in FIG. 3, and perform snow removal work in the same way as a conventional snowplow. At this time, the point of action of the moment about the center of gravity G applied to the vehicle body 10a by the snow is the spherical bearing 14. Here, the mounting position of the spherical bearing 14 is the vehicle body 10.
The moment generated around the center of gravity G of the vehicle body 10a is It is smaller than the conventional snowplow 3. Therefore, the front side of the snowplow 3 is prevented from lifting up,
It is possible to finish the snow removal surface parallel to the road surface.

Note that the hydraulic cylinder 1 that rotates the arm 13
9 force application point (in this example, the spherical bearing 21)
Since the distance between the rotary fulcrum of the arm 13 (in this embodiment, the spherical bearing 14) is longer than that of a conventional snowplow, the hydraulic cylinder 19 raises and lowers the snowplow device 12 more easily than a conventional snowplow.

On the other hand, the snow removal device 12 can be tilted laterally (tilt angle θ) in the width direction by operating the hydraulic cylinders 19, 19, respectively. During snow removal work, the snow removal device 12 rotates up and down in a vertical plane in the running direction of the snowplow, and also rotates around the center line along the length of the arm 13. Since the rotation range is restricted by the guide frame 25, the tilt angle θ of the snow removal device 12 falls within a predetermined range. In other words, an arbitrary tilt angle θ can be set depending on the size of the guide frame 25. Note that the stop rod 22 of the arm stopper 22 depends on the upper and lower positions of the snow removal device 12.
b swings in the front-rear direction of the vehicle body 10a, and the guide frame 25
When the arm stopper 22 contacts the pin 2, the arm stopper 22
3 to prevent bending or breakage.

Further, the stop member 26 comes into contact with the side surface of the arm 13 to restrict the lateral swing of the arm 13 in the width direction of the snowplow 10.

Note that the arm 13 can of course be applied to a snowplow having a traveling device other than the crawler 11.

A recess is formed in the vehicle body from the front of the vehicle body to the vicinity of the center of gravity of the vehicle body, and the arm is pivoted to the vehicle body by a spherical bearing near the center of gravity within the recess so as to be able to freely rotate up and down within a vertical plane in the direction of travel of the snowplow. Since the structure is such that the moment around the center of gravity of the snowplow caused by snow is minimized, the front side of the snowplow is prevented from lifting, and snow removal work can be carried out efficiently.

Further, the arm is pivotally connected to the vehicle body by a spherical bearing so as to be rotatable about a center line along its length, and a range of rotation of the arm around the center line is provided between the arm and the vehicle body. The device is equipped with a regulating means for regulating the amount of snow removed, and a pair of left and right vertical means for vertically rotating the arm around a spherical bearing. It is possible to remove snow according to snow removal conditions such as
It is possible to improve the finish of the snow removal surface.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of a snowplow having a conventional link mechanism, FIG. 2 is a side view showing a state in which the snowplow shown in FIG. 1 is removing snow, and FIG.
The figure is a schematic side view showing one embodiment of the present invention, FIG. 4 is a plan view of FIG. 3, FIG. 5 is an enlarged schematic plan view of the main part of the same embodiment, and FIG. 7 is a front view of a part of FIG. 5, FIG. 8 is an enlarged schematic side view of the main part of the same embodiment, and FIG. 9 is B of FIG. 8.
FIG. 10, an enlarged cross-sectional view of the portion, is an explanatory diagram showing the tilt angle θ. H...auger, G...center of gravity, 10...snowplow,
10a...Vehicle body, 10b...Recess, 10c...Front, 12...Snow removal device, 13...Arm link,
13a... One end, 13b... Base end, 19... Hydraulic cylinder (vertical means), 22... Arm stopper (regulating means), 22b... Stop rod (regulating means), 25... Guide frame (regulating means) .

Claims (1)

[Claims] 1. In a snow removal vehicle in which a snow removal device such as an auger is attached to the vehicle body via an arm, a recess is formed in the vehicle body from the front of the vehicle body to the vicinity of the center of gravity of the vehicle body, and the arm has a spherical surface in the vicinity of the center of gravity within the recess. The arm is pivotally connected to the vehicle body by a bearing so as to be rotatable up and down within a vertical plane in the direction in which the snowplow travels, and around a center line along the length of the arm, and between the arm and the vehicle body. A snow removal device characterized in that a regulating means for regulating the range of rotation of the arm about the center line, and a pair of left and right vertical means for vertically rotating the arm about a spherical bearing as a fulcrum are provided. Vehicle snow removal equipment support linkage.