JP2000240027A - Auger for rotary snow removing car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer the reduced horsepower of auger rotating horsepower and running horsepower to blower snow throwing horse power to improve snow disposing capacity and snow disposing performance by modifying the shape of an auger to reduce the auger rotating horsepower and the running horsepower, in an auger for a rotary snow removing car. SOLUTION: This auger 7 for a rotary snow removing car is arranged in front of the snow throwing blower of the rotary snow removing car, cuts and crushes a lump of snow as an object of snow removing, and sends the crushed snow to the snow throwing blower. In this case, within the snow scraping faces of ribbon screws 11, 12 helically extended along the cylindrical outer circumferential contour face of the auger 7, a snow scraping face 13a close to the outer circumferential edge part 13 has a rake θ of about 30 deg.-80 deg. in the perpendicular plane to the rotary axis of the auger 7 relative to the circumscribed snow face Sa circumscribing the rotary face of the outer circumferential edge part 13 on the outer circumferential edge part 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved auger shape, which reduces auger rotating horsepower and running horsepower, and converts the reduced auger rotating horsepower and running horsepower into blower snow throwing horsepower to treat snow. TECHNICAL FIELD The present invention relates to an auger for a rotary snow plow, which is capable of improving performance and snow processing performance.

[0002]

2. Description of the Related Art Generally, a snow removal device for a rotary snow removal vehicle is provided by:
A blower for snow removal is provided in the center of the snow removal device, and the snow that has been cut and crushed by the rotation of the auger is sucked from the suction port of the blower and blown out from the blow port of the chute. It is configured so that the sucked snow can be blown away.

[0003] If the snow entering the blower is scattered fine and granular snow, the snow is easily swallowed into the blower, and is further blown on the rotating blades of the blower. However, in the early stage of snowfall, although the particles are in discrete particles, the snow that has passed after the snowfall has become unified into snow masses due to the combination of snow particles, and the suction to the blower suction port is not possible. Even if it becomes difficult, or even if it can be sucked up to the suction port of the blower, it is difficult to feed the inside of the blower.

Therefore, the rotary snow removing device is provided with an auger for pulverizing snow chunks in front of the blower as described above, and the auger extends spirally along a cylindrical outer peripheral surface. A rotating body that has a ribbon screw that is a ribbon-shaped screw.By the rotation of this ribbon screw, the snow mass is first crushed into small pieces to make it fall apart, and the snow in the crushed particle state is turned left and right in the opposite direction of the ribbon screw. In accordance with the direction of the spiral torsion formed in the ribbon screw, the right and left ends of the ribbon screw are raked toward the center of the ribbon screw.

FIG. 7 is a cross-sectional view of a main part of a ribbon screw of a conventional auger for a rotary snowplow. In FIG. 7, the helical blade constituting the auger ribbon screw 011 has an outer peripheral edge 012 and an inner peripheral edge 013, and the rear side near the inner peripheral edge 013 of the blade has a reinforcing member 0.
14 reinforced. When the auger rotates and the ribbon screw 011 rotates and moves in the direction of arrow d, the helical blades constituting the ribbon screw 011 first cut the upper layer of the snow cover S, and finely crush the snow clumps to separate them. Then, the crushed snow in the state of particles is scraped from the left and right ends of the ribbon screw 011 to the center of the ribbon screw 011 according to the direction of the spiral twist formed in the right and left opposite directions.

As shown in FIG. 7, the ribbon screw 011 of the conventional auger 07 is spirally extended and has a twist angle in a plan view, but the snow scraping surface 011a (the plate surface on the side that pushes away snow). In FIG. 7, the left wing plate surface of the ribbon screw 011 is the ribbon screw 01.
1 has a right angle, that is, an angle of 90 ° in a plane perpendicular to the rotation axis of the auger 07 with respect to the circumscribed snow surface Sa circumscribing the rotation surface of the outer periphery 012 at the outer periphery 012. Since it is formed so as to push the snow with the force P in the direction of the arrow e with the rotation,
Auger 07 with conventional ribbon screw 011 is
The cutting performance of snow is inferior and the rotational resistance during cutting is large.

[0007] In FIG. 7, as described above, the ribbon screw 011 of the conventional auger 07 has a snow-scraping surface 011a.
Has a right angle to the circumscribed snow surface Sa, that is, an angle of 90 °, and the snow cover S is vertically pushed by the blade plate surface of the ribbon screw 011, so that the snow scraping surface 011 a of the ribbon screw 011, that is, the blade plate surface There is another snow mass at the destination of the snow that is pushed and moved, and the snow pushed by the snow scraping surface 011a of the ribbon screw 011, that is, the blade surface, is compressed with each other, and the compression proceeds, leading to the compression failure. The compressed and destroyed snow escapes toward the radial center of the auger 07, which is a space, and the snow is taken into the outer peripheral contour of the auger 07. Therefore, in the ribbon screw 011 of the conventional auger 07, the compression breaking energy for compressing and breaking the snow which is pushed and moved by the snow scraping surface 011a, that is, the slat surface, and the snow lump to be moved to the destination are also reduced. Therefore, as the auger rotation horsepower, which is the horsepower required for rotation of the auger 07, the compression fracture energy is also required.

[0008] The horsepower of the engine mounted on the rotary snowplow is divided into three horsepowers of "running horsepower", "blower snow throwing horsepower", and "auger rotating horsepower". Here, the most required performance of the rotary snowplow is the snow processing capacity, which is usually expressed as [snow removal processing amount / unit time]. This snow processing capacity indicates the amount of snow that can be blown per unit time by the blower, and is determined by the horsepower input to the blower, that is, the “blower snow throwing horsepower”.

[0009] From this, "auger rotation horsepower" is basically a secondary element, and therefore, the horsepower consumed for rotation of the auger, that is, "auger rotation horsepower" can be reduced, and "auger rotation horsepower" can be reduced. If the horsepower for which the "rotating horsepower" could be reduced could be turned into "blower snow throwing horsepower", the snow processing capacity would increase accordingly. The greater the resistance in a condition where the snow cover is close to hard ice, the lower the crushing capacity of the auger mechanism as described above in the auger mechanism, and conversely, the horsepower consumed for rotation of the auger, that is, the “auger rotation horsepower” increases. I do.

[0010]

In the conventional rotary snowplow as described above, it is desired to further improve the crushing ability of the auger mechanism against snow chunks. It is desirable to have a self-advancing ability, and by having the self-advancing ability, it is possible to reduce horsepower consumed in a traveling horsepower transmission unit such as an axle unit or a tire unit as traveling horsepower. It is desirable to be able to reduce the horsepower for running that can be reduced to the blower snow throwing horsepower, and also to increase the snow processing capacity. It is desired to do.

Therefore, the present invention enables the power consumption of the auger to be reduced by the improved auger shape, to increase the crushing capacity of the auger mechanism against snow clumps, Even if it is of the type that rotates so as to bite into a snow lump, it can have a large self-advancing ability, and by having the same self-advancing ability, the horsepower for traveling such as axle parts and tire parts The horsepower consumed in the traveling horsepower transmission unit can be reduced, the horsepower that can be reduced in the traveling horsepower can be turned into blower snow throwing horsepower, and the snow processing capacity So that the snow removal performance, which is the basis of a rotary snowplow, can be improved.
It is intended to provide an auger for a rotary snowplow.

Further, the present invention enables the snow taken in by the ribbon screw of the auger to be captured for a while by the snow-scraping surface near the inner peripheral edge of the ribbon screw, and the snow is taken in by the ribbon screw. The snow does not move to the inner peripheral portion of the ribbon screw along the scraped surface of the blade plate of the ribbon screw and immediately escape from the inner peripheral portion to the space inside the auger than the ribbon screw. It is an object of the present invention to provide a rotary snowplow auger capable of improving the ability of a ribbon screw to feed snow toward a blower. .

Further, according to the present invention, the snow taken in by the ribbon screw of the auger can be captured for a while by the arc-shaped snow-scraping surface near the inner peripheral edge of the ribbon screw. , So that it does not move to the inner peripheral portion of the ribbon screw along the snow scraping surface of the blade plate of the ribbon screw and immediately escape from the inner peripheral edge to the space inside the auger than the ribbon screw. Another object of the present invention is to provide a rotary snowplow auger capable of improving the ability of a ribbon screw to feed snow toward a blower.

The present invention also relates to a ribbon screw 11,
It is an object of the present invention to provide a rotary snowplow auger that can easily suck the snow taken in by the blower 12 into the blower by the suction force of the blower itself.

[0015]

In order to solve the above-mentioned problems, a rotary snowplow auger according to the present invention is provided in front of a snow blower of a rotary snowplow to remove snow mass to be snow-removed. An auger for a rotary snowplow that cuts and crushes and sends crushed snow to the blower for snow throwing, wherein a snowplow surface of a ribbon screw spirally extended along a cylindrical outer peripheral surface of the auger. At least the snow-scraping surface near the outer peripheral edge is substantially 30 ° to approximately 30 ° in a plane perpendicular to the rotation axis of the auger with respect to a circumscribed snow surface circumscribing the rotating surface of the outer peripheral edge at the outer peripheral edge. It has a rake angle of 80 °.

Further, in the auger for a rotary snowplow according to the present invention, from the outer peripheral edge portion of the blade plate forming the ribbon screw inward in the radial direction of the auger, approximately 1/3 of the width of the blade plate. The snow-scraping surface near the outer peripheral edge between approximately 1/2 is substantially in a plane perpendicular to the rotation axis of the auger with respect to the circumscribed snow surface circumscribing the rotation surface of the outer peripheral edge at the outer peripheral edge. It has a rake angle of about 30 ° to about 80 °, and the snow-scraping surface near the inner peripheral edge formed by the remaining portion of the blade plate in the width direction of the blade is in contact with the outer snow-contacting surface circumscribing the outer peripheral edge, The auger has a rake angle of approximately 80 ° to approximately 90 ° in a plane perpendicular to the rotation axis of the auger.

Further, in the auger for a rotary snowplow of the present invention, the snow-scraping surface at the outer peripheral edge of the blade plate forming the ribbon screw circumscribes the rotating surface of the outer peripheral edge at the outer peripheral edge. In contrast, the rake has a rake angle of about 30 ° to about 80 ° in a plane perpendicular to the rotation axis of the auger, and the snowplow surface from the outer peripheral edge to the inner peripheral edge of the slat is A smooth arcuate curved surface is formed along a plane perpendicular to the rotation axis of the auger, and the abrasion surface at the inner peripheral edge of the slat is rotated with respect to the outer snow contact surface circumscribing the outer peripheral edge. It has a rake angle of approximately 80 ° to approximately 90 ° in a plane perpendicular to the axis.

Further, in the auger for a rotary snowplow of the present invention, the snow scraping surface of the blade plate of the ribbon screw is
From the outer peripheral edge to the inner peripheral edge of the ribbon screw, the tangential snow surface circumscribing the outer peripheral edge is uniformly about 30 ° to about 80 ° in a plane perpendicular to the rotation axis of the auger.す has a rake angle.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a ribbon screw of an auger for a rotary snowplow according to an embodiment of the present invention, and is a cross-sectional view of a main part taken along line AA in FIG. FIG. 3 is a side view showing an example of a rotary snowplow equipped with the rotary snowplow auger according to the embodiment of FIG. 1; FIG. 3 is a front view of the rotary snowplow of FIG. 2; FIG. 5 is an enlarged front view of the auger portion of the rotary snow plow shown in FIG. 3, and FIG. 5 is a developed plan view showing a developed view of the auger shown in FIG. 4 when a ribbon screw is developed on a plane, together with a rear blower of the auger. FIG. 6 is a side view for explaining the operation of the auger and the blower shown in FIG. 3 and FIG.

Referring first to FIGS. 2 and 3, a rotary snowplow 1 has an operator's cab 2 and a power facility 3, and travels as a vehicle with traveling wheels 4 constituting front wheels and traveling wheels 5 constituting rear wheels. You can do it. In front of the cab 2, a snow removal device 6 operable from inside the cab 2 is supported by a body frame via a support device.

The snow removing device 6 includes an auger 7 for removing snow from the snow cover, a blower 8 having a suction port toward the auger 7 behind the auger 7, and a fine powdery snow fed by the blower 8 together with air. And a chute 9 that can blow out from the outlet to the side of the rotary snowplow 1.

As shown in FIGS. 3, 4 and 5, the auger 7 comprises three ribbon screws 11a supported at equal angular intervals around an auger shaft 10 whose center line extends in the left-right direction. A ribbon screw 11 on the left side (right side in FIGS. 3 and 4) composed of 11b and 11c, and three ribbon screws 12a, 12b and 1 also supported at equal angular intervals around the auger shaft 10.
2c and two sets of left and right ribbon screws 1 with the right (left in FIGS. 3 and 4) ribbon screw 12 made of 2c.
1 and 12.

In FIGS. 3, 4 and 5, each of the two sets of right and left ribbon screws 11 and 12 has a twisting direction opposite to each other. 11 and 12 are auger shafts 10
As shown in FIG. 6, the auger 7 moves downward from the uppermost position via the front side of the auger 7 to reach the lowermost position while scraping the snow S, and further from the lowermost position.
By rotating and driving in the direction of moving sequentially upward through the rear side, the snow on the road is cut, and the cut snow is
The powder can be scraped from both left and right sides of the auger 7 to the center of the auger 7 while being pulverized.

That is, as shown in FIGS. 4, 5 and 6, the rotary snowplow 1 moves forward in the direction of arrow a and the snow S
When entering the inside, first, the left and right ribbon screws 11 and 12 of the rotating auger 7 cut the snow and crush the snow mass. The crushed snow mass becomes finer granular snow and is sent from the front side of the auger 7 to the rear side of the auger 7 through the lower side of the auger 7 as shown by arrows b and c, and at the same time, The air is agitated from the left and right sides of the auger 7 toward the center of the auger 7 and is sucked into the blower 8 together with the surrounding air from the suction port of the blower 8 behind the auger 7.

As shown in FIGS. 2, 3, 4 and 6,
The blower 8 sucks the snow pulverized by the auger 7 and raked to the center together with the surrounding air and sends it to the chute 9 as described above. The chute 9 can turn around the vertical axis to freely change the blowing direction of the snow, and the powdery snow fed from the blower 8 through the duct is moved, for example, to the side of the rotary snowplow 1. Can be blown away.

In FIG. 1, the ribbon screws 11 and 12 of the auger 7 are constituted by blades formed by long plates having a helical continuous surface, and have an outer peripheral edge 13 and an inner peripheral edge 14, The back side near the inner peripheral edge portion 14 of the blade plate is reinforced by a reinforcing material 15. When the auger 7 rotates and the ribbon screws 11 and 12 rotate and move in the direction of arrow g, the helical blades constituting the ribbon screws 11 and 12 first cut the upper layer of the snow S and finely crush the snow mass. In accordance with the direction of the helical twist formed in the right and left opposite directions of the ribbon screws 11 and 12, the snow in the crushed particle state is separated from the right and left ends of the ribbon screw 11.
Rake into the center of 1.

As shown in FIG. 1, in the present invention, at least the snow-scraping surface 13 a of the ribbon screws 11 and 12 near the outer peripheral edge 13 is formed around the rotation axis of the outer peripheral edge 13 at the outer peripheral edge 13. Has a rake angle θ of approximately 30 ° to approximately 80 ° in a plane perpendicular to the rotation axis of the auger 7 with respect to the circumscribed snow surface Sa circumscribing the rotation surface of the auger 7.

In FIG. 1, the ribbon screws 11, 1
2 from the outer peripheral edge portion 13 of the blade plate toward the radially inward direction of the auger 7 to about 1/3 to about 1 / of the plate width of the blade plate.
2, a snow scraping surface 13a near the outer peripheral edge 13 is perpendicular to the rotation axis of the auger 7 with respect to the circumscribed snow surface Sa circumscribing the rotation surface around the rotation axis of the outer peripheral edge 13 at the outer peripheral edge 13. While having a rake angle of approximately 30 ° to approximately 80 ° in the plane, a snow-plowing surface near the inner peripheral edge 14 formed by the remaining in the width direction of the blades forming the ribbon screws 11 and 12. 14 a has a rake angle of approximately 80 ° to approximately 90 ° with respect to a circumscribed snow surface Sa circumscribing the outer peripheral edge portion 13 in a plane perpendicular to the rotation axis of the auger 7.

The ribbon screws 11, 12 shown in FIG.
Apart from the shape of the ribbon screw 11,
Twelve shapes can also be used. That is, the snow scraping surface at the outer peripheral edge 13 of the blade plate forming the ribbon screws 11 and 12 is
Has a rake angle of about 30 ° to about 80 ° in a plane perpendicular to the rotation axis of the auger 7 with respect to the circumscribed snow surface Sa circumscribing the rotation plane around the rotation axis of the auger 7.
Of the auger 7 forms a smooth arcuate curved surface along a plane perpendicular to the rotation axis of the auger 7, and the snow-scraping surface at the inner peripheral edge 14 of the auger 7 corresponds to the outer peripheral edge 13. Ribbon screws 11 and 12 may have a rake angle of approximately 80 ° to approximately 90 ° in a plane perpendicular to the rotation axis of auger 7 with respect to circumscribed snow surface Sa circumscribing.

In addition to the shapes of the blades of the ribbon screws 11 and 12 described above, various other ribbon screws 1
1, 12 wing plate shapes, for example, ribbon screw 1
From the outer peripheral edge 13 to the inner peripheral edge 14 of 1 and 12,
The shape of the blades of the ribbon screws 11 and 12 which are snowscraping surfaces having a uniform rake angle θ in a plane perpendicular to the rotation axis of the auger 7 with respect to the circumscribing snow surface Sa circumscribing the outer peripheral edge portion 13 Various ribbon screws 11, 12
The shape of the blade plate of the ribbon screw 11 can be adopted in accordance with the snow condition.

In FIG. 1, FIG. 4, FIG. 5, and FIG. 6, the width of the blade plate of the ribbon screws 11 and 12 of the auger 7 is
Although there is a difference depending on the size of the snowplow, for example, the width 5
It has a shape in which a flat plate of 0 mm to 200 mm is twisted and wound. Since the auger 7 is a rotating body, the contact surface between the auger 7 and the snow cover S is a contact surface having an arc-shaped cross section having a radius corresponding to the radius of the auger 7.

As shown in FIG.
At least the snow-scraping surface 13 a of the snow-scraping surfaces 1 and 12 near the outer peripheral edge 13 is the outer peripheral edge 1 at the outer peripheral edge 13.
In the plane perpendicular to the rotation axis of the auger 7, the outer circumscribed snow surface Sa circumscribing the rotation plane around the rotation axis
If the rake angle θ is approximately 80 ° to approximately 80 °, the ribbon screws 11 and 12 can cut the snow S by rotating the rake angle θ in such a manner as to insert a wedge into the snow S.

Here, the rake angle θ of the snow scraping surface 13a near the outer peripheral edge 13 of the ribbon screws 11 and 12 is approximately 30.
If it is smaller than ゜, the snow-plowing action of the snow-plowing surface 13a becomes insufficient, and the ribbon screws 11, 1
2 becomes weaker due to the reaction force of the snow S, and the self-advancing action cannot be expected due to the rotation of the auger 7.
If the rake angle θ of the snow-scraping surface 13a near the outer peripheral edge 13 of 1 and 12 is larger than approximately 80 °, the snow-scraping surface 13a cannot enter the snow S at a sufficient acute angle, and On the other hand, the ribbon screws 11 and 12 cannot exhibit sufficient crushing ability, and the reaction force of snow received with the rotation of the auger 7 is large, so that the required torque required for rotation of the auger 7 is sufficiently reduced. Can not.

In FIG. 1, the snow scraping surface 13a near the outer peripheral edge 13 of the ribbon screws 11 and 12 enters the snow cover S at an acute angle as described above. Large crushing capacity. Further, since the ribbon screws 11 and 12 enter the snow cover S with a rake angle θ of approximately 30 ° to approximately 80 °, the pressing force of the snow scraping surface 13a opposed to the snow pressure indicated by the arrow j is as shown in FIG. As shown, this is required in a conventional ribbon screw 011 which has a snow-scraping surface 011a perpendicular to the direction of travel of the ribbon screw 011 and thus has a rake angle of 90 ° to the circumscribed snow surface Sa. The pressing force P is reduced by the rake angle θ, and Psin θ
, The torque required for rotation of the auger 7 is reduced at this ratio, and the auger rotation horsepower is reduced. Further, the direction in which the snow is lifted and moved at the rake angle θ is the space on the center side when viewed in the radial direction of the auger 7, and the snow lifted by the ribbon screws 11, 12 is
Immediately, the pressing force on the ribbon screws 11 and 12 is lost.

As illustrated in FIG. 1, according to the ribbon screws 11 and 12 of the present invention, the rake angle θ makes it possible for the snow scraping surfaces of the ribbon screws 11 and 12 to form an acute angle with the snow S. By entering, even if the snow is hard, the crushing of the snow is performed smoothly. Also,
The auger rotation horsepower can be reduced by reducing the reaction force of snow by the rake angle θ and eliminating the need for compressive breaking energy required for compressive breaking of snow that occurs when the rake angle is 90 °.

Further, the ribbon screws 11 and 12
Since it enters in a manner of biting into the frontal snow mass, it receives a force pushed forward by the reaction force of the snowfall S. Therefore, when the auger 7 rotates, a self-advancing force is generated.

The driving force transmitted from the engine is:
It is transmitted to the tire and consumed between the tire and the road surface. Since the auger 7 of the present invention has the self-advancing ability as described above, the traveling driving force consumed between the tire and the road surface can be reduced by that much, and the traveling horsepower is reduced. Since the amount of horsepower for traveling can be reduced to the blower snow throwing horsepower, the snow processing capacity can be increased accordingly.

As shown in FIG. 1, the blade screws forming the ribbon screws 11 and 12 extend inward in the radial direction of the auger 7 from the outer peripheral edge 13 of the blade plate, and the width of the blade is approximately 1/1 of the width of the blade.
The snow-scraping surface 13a closer to the outer peripheral edge 13 between 3 and approximately 1/2
Has a rake angle of about 30 ° to about 80 ° in a plane perpendicular to the rotation axis of the auger 7 with respect to a circumscribed snow surface Sa circumscribing the rotation surface of the outer circumference 13 around the rotation axis of the outer circumference 13. Whereas the ribbon screw 11,
A snow-scraping surface 14 a near the inner peripheral edge 14 formed by the remaining portion of the blades forming the outer peripheral edge 13
Has a rake angle of approximately 80 ° to approximately 90 ° in a plane perpendicular to the rotation axis of the auger 7 with respect to the circumscribed snow surface Sa circumscribing the snow, the snow taken in by the ribbon screws 11 and 12 is removed. The snow scraping surface 14a near the inner peripheral edge portion 14 can be captured for a while, and the snow taken in by the ribbon screws 11 and 12 is removed along the snow scraping surface of the blades of the ribbon screws 11 and 12 by the inner peripheral edge portion 14a. To prevent the air from immediately escaping from the inner peripheral edge portion 14 to the space inside the auger 7 from the ribbon screws 11 and 12, so that the ribbon screws 11 and 12 toward the blower 8 can be used. The ability to feed snow can be improved.

Further, the snow scraping surface of the outer peripheral edge 13 of the slats forming the ribbon screws 11 and 12 is attached to the auger 7 at the outer peripheral edge 13 with respect to the circumscribed snow surface circumscribing the rotation surface of the outer peripheral edge 13. Has a rake angle of about 30 ° to about 80 ° in a plane perpendicular to the rotation axis of the ribbon screw 11, 12, and the snowplow surface from the outer peripheral edge 13 to the inner peripheral edge 14 of the blade plate of the ribbon screws 11, 12 is auger. 7, a smooth arcuate curved surface is formed along a plane perpendicular to the rotation axis, and the snow scraping surface of the inner peripheral edge 14 of the blade plate of the ribbon screws 11 and 12 is in contact with the circumscribed snow surface Sa circumscribing the outer peripheral edge 13. Therefore, even when the auger 7 has a rake angle of about 80 ° to about 90 ° in a plane perpendicular to the rotation axis of the auger 7, the snow taken in by the ribbon screws 11 and 12 can be formed into an arc-like shape close to the inner peripheral edge portion 14. Snowplow surface by can leave trapped for some time, snow taken in by the ribbon screw 11 and 12, moves to the inner peripheral edge portion 14 along the snowplow surface of the slats of the ribbon screw 11,
The ribbon screw 1 toward the blower 8 is prevented from immediately escaping from the inner peripheral edge portion 14 into the space inside the auger 7 beyond the ribbon screws 11 and 12.
It is possible to improve the ability to feed snow by the first and second aspects.

Here, the snow-scraping surface of the inner peripheral edge 14 of the wing plate forming the ribbon screws 11 and 12 is in a plane perpendicular to the rotation axis of the auger 7 with respect to the circumscribed snow surface Sa circumscribing the outer peripheral edge 13. Is less than approximately 80 °,
The snow taken in by the ribbon screws 11 and 12 moves to the inner peripheral edge 14 along the snow-scraping surface of the blades of the ribbon screws 11 and 12, and from the inner peripheral edge 14,
It is easier to escape to the space inside the auger 7 than the ribbon screws 11 and 12, and it is not possible to sufficiently improve the ability of the ribbon screws 11 and 12 to feed the snow toward the blower 8. Screw 11, 1
If the snow-plowing surface at the inner peripheral edge 14 of the slats forming the second plate 2 is larger than approximately 90 ° in a plane perpendicular to the rotation axis of the auger 7 with respect to the circumscribed snow surface Sa circumscribing the outer peripheral edge 13, Since the reaction force of the snow received with the rotation of the auger 7 is large, the required torque required for the rotation of the auger 7 cannot be sufficiently reduced.

The snow scraping surfaces of the blades of the ribbon screws 11 and 12 extend from the outer peripheral edge 13 to the inner peripheral edge 14 of the ribbon screws 11 and 12 with respect to the outer snow surface Sa circumscribing the outer peripheral edge 13. If the snow scraping surface has a rake angle θ of approximately 30 ° to approximately 80 ° uniformly in a plane perpendicular to the rotation axis of the auger 7, the snow taken in by the ribbon screws 11 and 12 is removed. , Can be easily sucked into the blower 8 by the suction force of the blower 8 itself.

[0042]

According to the auger for a rotary snowplow of the present invention, the following effects can be obtained. (1) A rotary snowplow auger disposed in front of a snowplow blower of a rotary snowplow, cutting and crushing a snow mass to be snowplowed and sending the crushed snow to the snowplow. The snowplow surface of the ribbon screw spirally extended along the cylindrical outer peripheral surface of the auger has at least a snowplow surface near the outer peripheral edge, and a rotational surface of the outer peripheral edge at the outer peripheral edge. About 30 ° to about 80 ° in a plane perpendicular to the rotation axis of the auger,
゜ The rake angle of ゜ makes it possible to reduce the power consumption of the auger due to the improved auger shape, increase the crushing capacity of the auger mechanism against the snow lumps, When rotating so as to bite into the vehicle, a large self-advancing ability can be exhibited, and the self-advancing ability reduces the horsepower consumed in the traveling horsepower transmission unit such as the axle unit and the tire unit as the traveling horsepower. Can reduce the horsepower required for running to the horsepower required for the blower to throw snow, and can also increase the snow processing capacity. The performance can be improved (claim 1). (2) From the outer peripheral edge of the blade plate forming the ribbon screw toward the radially inward direction of the auger, the outer peripheral edge portion closer to approximately 1/3 to approximately 1/2 of the plate width of the blade plate. The snow scraping surface has a rake angle of approximately 30 ° to approximately 80 ° in a plane perpendicular to the rotation axis of the auger with respect to a circumscribed snow surface circumscribing the rotation surface of the outer peripheral edge at the outer peripheral edge. The snow scraping surface near the inner peripheral edge formed by the remaining portion of the blade plate in the plate width direction is substantially in a plane perpendicular to the rotation axis of the auger with respect to the outer circumscribing snow surface circumscribing the outer peripheral edge. Since it has a rake angle of 80 ° to approximately 90 °, in addition to the effect of the above (1), the snow taken in by the auger ribbon screw is removed by the snow scraping surface near the inner peripheral edge of the ribbon screw for a while. Can be captured, ribbon screw Therefore, the snow taken in moves to the inner peripheral edge of the ribbon screw along the scraping surface of the blade plate of the ribbon screw, and immediately escapes from the inner peripheral edge to the space inside the auger than the ribbon screw. In this way, the ability of the ribbon screw to feed the snow toward the blower can be improved (claim 2). (3) a plane perpendicular to the rotation axis of the auger, wherein a snow-scraping surface at an outer peripheral edge of the blade plate forming the ribbon screw is tangent to a circumscribed snow surface at the outer peripheral edge which circumscribes a rotation surface of the outer peripheral edge; The rake plate has a rake angle of about 30 ° to about 80 °, and the snowplow surface from the outer peripheral edge to the inner peripheral edge of the slat is smooth along a plane perpendicular to the rotation axis of the auger. An arcuate curved surface is formed, and the snow-scraping surface at the inner peripheral edge of the blade plate is approximately 80 ° to approximately 80 ° in a plane perpendicular to the rotation axis of the auger with respect to the circumscribed snow surface circumscribing the outer peripheral edge. Since it has a rake angle of 90 °, in addition to the effect of the above (1), the snow taken in by the auger ribbon screw is captured for a while by the arc-shaped snow-scraping surface near the inner peripheral edge of the ribbon screw. To keep The snow taken in by the ribbon screw moves to the inner peripheral edge of the ribbon screw along the snow scraping surface of the blade plate of the ribbon screw, and immediately from the inner peripheral edge to the space inside the auger than the ribbon screw. Thus, the ability of the ribbon screw to feed the snow toward the blower can be improved by preventing the snow from escaping (claim 3). (4) From the outer peripheral edge to the inner peripheral edge of the ribbon screw, the snow scraping surface of the blade of the ribbon screw is perpendicular to the rotation axis of the auger with respect to the external snow surface circumscribing the outer peripheral edge. Approximately 30 ° to approximately 8
Since it has a rake angle of 0 °, in addition to the effect of the above (1), snow taken in by the ribbon screw can be easily sucked into the blower by the suction force of the blower itself. 4).

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a ribbon screw of an auger for a rotary snowplow according to an embodiment of the present invention, taken along line AA in FIG.

FIG. 2 is a side view showing an example of a rotary snowplow equipped with the rotary snowplow auger according to the embodiment of FIG. 1;

FIG. 3 is a front view of the rotary snow plow shown in FIG. 2;

FIG. 4 is an enlarged front view of an auger portion of the rotary snow plow shown in FIG. 3;

FIG. 5 is a developed plan view showing a developed view when the ribbon screw of the auger of FIG. 4 is developed on a plane, together with a blower at the rear of the auger.

6 is a main part side view for explaining the operation of the auger and the blower shown in FIGS. 3 and 4. FIG.

FIG. 7 is a cross-sectional view of a main part of the ribbon screw of the conventional rotary snowplow auger corresponding to FIG.

[Explanation of symbols]

 011 Ribbon screw 011a Snow scraping surface 012 Outer edge 013 Inner edge 014 Reinforcement 07 Auger 1 Rotary snowplow 2 Operating room 3 Power equipment 4,5 Running wheel 6 Snow remover 7 Auger 8 Blower 9 Chute 10 Auger shaft 11,11a , 11b, 11c Ribbon screw 12, 12a, 12b, 12c Ribbon screw 13 Outer rim 13a Snow scraping surface 14 Inner rim 14a Snow scraping surface 15 Reinforcement a, b, c, d, e, f, g, h, j Arrows S Snow cover Sa circumscribed snow surface

Claims (4)

[Claims] 1. An auger for a rotary snow plow, which is disposed in front of a snow blower of a rotary snow plow, cuts and crushes a snow mass to be snow-removed, and sends the crushed snow to the snow blower. In the snowplow surface of the ribbon screw spirally extended along the cylindrical outer peripheral contour surface of the auger, at least the snowplow surface near the outer peripheral edge portion of the ribbon screw, the outer peripheral edge portion of the outer peripheral edge portion For the circumscribed snow surface that circumscribes the rotating surface,
Approximately 30 ° in a plane perpendicular to the rotation axis of the auger
An auger for a rotary snowplow, characterized by having a rake angle of approximately 80 °. 2. The auger for a rotary snowplow according to claim 1, wherein the width of the blade plate is approximately 1 from the outer peripheral edge of the blade plate forming the ribbon screw toward the inside in the radial direction of the auger. A surface perpendicular to the rotation axis of the auger, wherein a snow-scraping surface close to the outer peripheral portion between 〜 and approximately に 対 し て of the outer peripheral edge portion circumscribes a rotational surface of the outer peripheral edge portion at the outer peripheral edge portion. A rake angle of about 30 ° to about 80 ° inside, and the snow-scraping surface near the inner peripheral edge formed by the remaining portion of the slat in the width direction is attached to the outer circumscribed snow surface circumscribing the outer peripheral edge. An auger for a rotary snowplow, characterized in that the auger has a rake angle of about 80 ° to about 90 ° in a plane perpendicular to the rotation axis of the auger. 3. The auger for a rotary snowplow according to claim 1, wherein a snow-scraping surface at an outer peripheral edge of the blade plate forming the ribbon screw circumscribes a rotating surface of the outer peripheral edge at the outer peripheral edge. A rake angle of approximately 30 ° to approximately 80 ° in a plane perpendicular to the rotation axis of the auger with respect to the circumscribed snow surface, and a snow scraping surface extending from the outer peripheral edge to the inner peripheral edge of the slat; Form a smooth arcuate curved surface along a plane perpendicular to the rotation axis of the auger, and the snow-scraping surface at the inner peripheral edge of the slat is wrapped around the outer rim. An auger for a rotary snowplow, wherein the auger has a rake angle of about 80 ° to about 90 ° in a plane perpendicular to the rotation axis of the auger. 4. The auger for a rotary snowplow according to claim 1, wherein the snow scraping surface of the blade plate of the ribbon screw extends from the outer peripheral edge to the inner peripheral edge of the ribbon screw. It has a rake angle of approximately 30 ° to approximately 80 ° with respect to a circumscribed snow surface in a plane perpendicular to the rotation axis of the auger,
Auger for rotary snowplows.