JP2547025B2 - Snow plow ogre - Google Patents

Description

TECHNICAL FIELD The present invention relates to an auger for a snow blower, and more specifically,
The present invention relates to a snow scraping blade constituting an auger having a crushing blade for crushing snow on its outer peripheral portion.

(Prior Art) Conventionally, there is a snow blower disclosed in JP-A-59-88509.

According to this, a vehicle moving on the work surface is provided,
An auger is provided on the front side of this vehicle. This auger has a shaft center extending left and right and rotatably supported on the front side of the vehicle around the shaft center, and a snow scraper that is supported by the auger shaft and draws a spiral around the auger shaft. And a blade, which is supposed to rotate with the auger shaft. A crushing blade for crushing snow is formed on the outer peripheral portion of the blade.

During the snow removal work, when the blade is rotated and pressed against the snow, the crushing blade is impacted with the snow, the snow is crushed, and the crushed snow is sent to the blower.
Then, this snow is sent to the snow throw chute together with air by the blower, and is discharged in a desired direction.
Snow is being removed.

(Problems to be Solved by the Invention) By the way, the above conventional techniques have the following problems.

First, a notch extending inward in the radial direction of the blade and a cut line extending further inward in the radial direction from the bottom of the notch are formed in the outer peripheral portion of the blade, and in the rotating direction of the blade,
The crushing blade is formed by laterally bending the part of the blade behind the notch and the score line.

However, in this configuration, in the blade, at least a portion of the trailing edge on the front side of the score line and at least a part of the leading edge on the base side of the crushing blade, which is the portion on the rear side of the score line, are The front edge of the base side is covered with the rear edge of the front side portion from the front side because it overlaps with each other across the line, so that the blade was rotated and pressed against the snow. At this time, the fact that the base side of the crushing blade is impacted with snow is hindered by the presence of the front side portion.

Therefore, the above-mentioned conventional crushing blade does not effectively crush the snow, which may prevent smooth snow removal.

Secondly, the crushing blade is located radially inward of the outermost end of the outer peripheral surface of the blade's rotation trajectory, and therefore, when the blade is rotated and pressed against snow, The portions other than the crushing blades constituting the outer peripheral surface of the rotation trajectory first collide with snow, which prevents the crushing blades from being swiftly driven into the snow.

Therefore, also in this respect, the crushing blade may not effectively crush the snow.

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to effectively crush snow during snow removal work so that snow can be removed smoothly. And

(Structure of the Invention) In order to achieve the above object, a feature of the present invention is that an auger shaft having an axial center extending in the left-right direction is rotatably supported on a front side of a vehicle, and a snow scraper that draws a spiral around the auger shaft. A blade for use is provided so that this blade rotates with the auger shaft, and a crushing blade for crushing snow is formed on the outer peripheral portion of the blade, and the same crushing blade is a flat plate substantially parallel to the circumferential direction around the auger axis. In the auger of the snow blower as a body, a notch extending radially inward is formed in the outer peripheral portion of the blade, and the trailing edge of the notch in the rotational direction of the blade forms almost the entire leading edge of the crushing blade. And then
In addition, the cutting edge of the crushing blade is located at the outermost end on the outer peripheral surface of the rotation trajectory of the blade.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 is a snow remover, and an arrow Fr in the figure indicates the front of the snow remover 1. Reference numeral 2 denotes a vehicle, which can run on a snow removal work surface. The front part of the vehicle 2 supports the snow remover body 3.

The vehicle 2 has a body frame 4, and driving wheels t and driven wheels 6 are supported in front of and behind the body frame 4, and crawlers 7 are wound around these wheels 5, 6. Also,
An engine 8 for driving the drive wheels 5 is supported on the vehicle body frame 4. When the drive wheels 5 are driven by the engine 8, the crawlers 7 roll on the work surface, so that the vehicle 2 travels on the work surface. 9
Is a handle, and the snow removing work by the snow remover 1 is performed by the operator holding the handle 9.

The snow remover body 4 has a snow collecting mechanism and a snow throwing mechanism 2
It is a stage type, and each of these is configured as follows.

That is, the snow collecting mechanism has an auger 11.
Is located in front of the body frame 2. On the other hand, a drive shaft 12 extending forward from the inside of the vehicle body frame 2 is provided. The drive shaft 12 is driven by the engine 8 via a reduction gear (not shown), and the auger 11 is provided at the front end of the drive shaft 12. They are linked together. Also this auger
A snow collecting cover 13 is provided to cover the rear of 11 and both sides.

When the auger 11 is driven to rotate in the direction of arrow A in the figure, the auger 11 crushes the snow accumulated and
The snow is sent to the central portion in the vehicle width direction. In addition, at this time, the snow cover 13 guides the snow to flow toward the central portion in the vehicle width direction.

On the other hand, the snow throwing mechanism has a blower 15. This blower 15 rotates in the direction shown by the arrow R in the figure, the blower 15 is crushed by the auger 11, and the arrow B in the figure
As shown by the arrow, the snow sent to the center in the vehicle width direction is indicated by arrow C in the figure.
The air is sent to the snow chute 14 together with the air as shown by. Then, the snow throw chute 14 guides and discharges the fed snow in a desired direction as shown by an arrow D in the figure. 1 and 3, the auger 11 will be described in more detail. The auger 11 has an auger shaft 16 whose center axis extends in the vehicle width direction within the snow collecting cover 13. Both ends are supported by the left and right side walls of the snow cover 13, and the central portion thereof is interlocked with the drive shaft 12.

The left side of the auger shaft 16 is a pair of left side first blades 17,1
7 and a pair of left side second blades 18, 18 are supported by a support arm 19. Each of the left side first blade 17 and the left side second blade 18 has a shape that draws a spiral around the auger shaft 16 in the same twisting direction (right screw), and has the same size and shape.

The right side of the auger shaft 16 is the right side first blade 1
7 ', 17' and right side second blades 18 ', 18' are supported, and these left side first blades 17, 17 and left side second blades 18, 18 are symmetrical with each other. There is.

The left side first blades 17 and 17, the left side second blades 1
8 and 18 are located at the same position in the axial direction of the auger shaft 16, but the left first blade 17 and the left second blade 18 are juxtaposed in the axial direction of the auger shaft 16. Also,
The left side first blades 17, 17, the left side second blades 18,
The 18 parts are out of phase with each other by about 180 ° in the circumferential direction of the auger shaft 16, and the left first blade 17 and the left second blade 18 are also out of phase with each other by about 90 ° in the circumferential direction of the auger shaft 16. There is. Further, the corresponding end portions 17a, 18a of the left first blade 17 and the left second blade 18 are separated from each other in the circumferential direction of the auger shaft 16.

When rotating the left side first blade 17 and the left side second blade 18 with the rotation of the auger shaft 16, the end portions 17a,
The rotation loci of 18a overlap each other. In this case, the end portions 17a, 18a in the axial direction of the auger shaft 16
The overlapping dimension of is indicated by 1 as shown in FIG.

In FIGS. 1 and 3 to 5, triangular crushing blades 21 are formed on the outer peripheral edges of both blades 17 and 18 at equal intervals in the circumferential direction. The crushing blade 21 is formed as follows. That is, the notch 22 extending inward in the radial direction is formed in the outer peripheral portion of each blade 17, 18. Then this notch 22
The portions of the blades 17, 18 on the rear side in the rotational direction A are bent. The triangular piece formed by this bending is the crushing blade 21, and the left first and second blades
In the rotational direction A of 17, 18 the trailing edge of the notch 22 is the crushing blade 2
It forms almost the entire leading edge of 1. The reference numeral 21 'in FIG. 4 shows the state before the crushing blade 21 is bent and formed.

Further, the cutting edge 21a of the crushing blade 21 forms the outermost end portion (shown by reference numeral D in FIG. 4) in the radial direction of the auger shaft 16 on the outer peripheral surface of the rotation loci of the blades 17 and 18. .

Further, as shown in FIG. 5, the crushing blade 21 has an auger shaft.
It is formed of a flat plate body that is substantially parallel to the circumferential direction around the axis 16a of the shaft 16.

(Operation) Next, the operation of the above configuration will be described. The auger
Since 11 is bilaterally symmetric, only the left part will be described. When the snow blower 1 is moved forward while rotating both blades 17 and 18 and pressed against the snow on which both blades 17 and 18 are stacked, first, the crushing blade 21 is impacted into the snow on which it is stacked. Crush this. At the same time, the front end portions 17a, 18a of the blades 17 and 18 in the rotational direction are also impacted by the impacted snow and effectively crush it, which makes the snow fine enough. Be crushed.

Next, the crushed snow is scraped into the snow cover 13 by the rotation of the blades 17 and 18, and is sent toward the central portion of the snow cover 13, that is, the blower 15.

In the above case, the rotation loci of the end portions 17a, 18a of the adjacent blades 17, 18 overlap each other, so
In addition, the snow is surely crushed between the adjacent blades 17 and 18. Secondly, both of these blades 17,1
When the snow is sent toward the blower 15 at 8, the transfer of the feed from the one blade 17 to the other blade 18 is smoothly performed, that is, the snow is reliably fed.

(Other Embodiments) FIG. 6 shows another embodiment of the crushing blade 21. According to this, the blade edge 21a of the crushing blade 21 projects radially outward more than other portions, and the outermost end in the radial direction of the auger shaft 16 among the outer peripheral surfaces of the rotation loci of the blades 17 and 18. Portion (indicated by reference numeral D in FIG. 6) is formed. Other configurations are the same as those shown in FIG.

(Effect of the Invention) According to the present invention, a snow scraping blade that draws a spiral around the auger shaft is provided so that the blade rotates together with the auger shaft, and a crushing blade for crushing snow is provided on the outer circumference of the blade. In the auger of the snow remover, which is formed in a portion and has the same crushing blade as a flat plate substantially parallel to the circumferential direction around the auger axis, a notch extending inward in the radial direction is formed in the outer peripheral portion of the blade, In the direction of rotation, the trailing edge of the notch forms substantially the entire leading edge of the crushing blade.

Therefore, almost the entire front edge of the crushing blade is exposed to the outside through the notch.

Therefore, when the blade is rotated and pressed against snow, almost the entire leading edge of the crushing blade is impacted into the snow without being disturbed by other portions of the blade. , This snow is effectively crushed, and the subsequent snow removal work will be carried out smoothly.

Moreover, the blade tip of the crushing blade is located at the outermost end of the outer peripheral surface of the rotation trajectory of the blade.

Therefore, when the blade is rotated to approach the snow as described above, the cutting edge of the crushing blade collides with the snow before the other portions of the blade.

Therefore, the above crushing is performed more effectively, and the subsequent snow removal work is performed more smoothly.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of an auger, FIG. 2 is an overall side view of a snow blower, and FIG. 3 is II of FIG.
Fig. 4 is a partially enlarged view of Fig. 3, Fig. 5 is a sectional view taken along the line V-V of Fig. 4, and Fig. 6 is another embodiment of the crushing blade. It is a figure equivalent to FIG. 1 ... Snowblower, 2 ... Vehicle, 11 ... Auger, 16 ... Auger shaft, 17 ... Left first blade, 18 ... Left second blade, 21 ... Crushing blade, 21a ... Blade edge, D ...... Outer peripheral surface of blade rotation locus, 22 ... Notch.

Claims (1)

(57) [Claims] 1. An auger shaft having an axial center extending left and right is rotatably supported on a front side of a vehicle, and a snow scraping blade that draws a spiral around the auger shaft is provided so that the blade rotates together with the auger shaft. In the auger of the snow remover, in which a crushing blade for crushing snow is formed on the outer peripheral portion of the blade, and the same crushing blade is a flat plate substantially parallel to the circumferential direction around the auger axis. Form a notch extending inward in the radial direction, so that the trailing edge of the notch forms substantially the entire leading edge of the crushing blade in the rotational direction of the blade, and the outer peripheral surface of the rotational trajectory of the blade. Among them, an auger for a snow blower characterized in that the edge of the crushing blade is located at the outermost end.