JPH01105811A - Small snow removing machine - Google Patents

Abstract

PURPOSE: To efficiently sweep snow, and feed it to blower blades by fitting a spiral auger with tip formed to be on the outer side in the axial direction to the blower blades of a snow removing machine. CONSTITUTION: An engine is fitted to a tip of a rod 3 having an operation handle, and blower blades 11 are radially fixed to a rotary shaft 10 to be driven thereby. An auger 12 which is extended in the rotational direction side from a base end part 12a along the circumferential direction and formed in a spiral shape so that a tip part 12b in the circumferential direction is on the forward side, and a middle part of the auger 12 is integratedly connected to a forward end part of the rotary shaft 10 by a stay 14.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a small snow blower.

(Prior art) Figure 13 shows an example of a conventional snow blower, and Case 4
0 has an opening 43 at the front end in the axial direction, and is provided with a plurality of blower blades 41 on a rotating shaft extending in the front-rear direction.
A guide plate 42 on which snow is written is formed at the front end.

However, the tip portion 42b of each guide plate 42 on the rotation direction R side
are widely spaced in the circumferential direction.

With such a wide spacing, the snow that enters when the guide plate 42 shovels the snow reaches the blower blade 41 in a relatively disordered state without being braked in the direction of inflow, and the snow that enters the snow when shoveled by the guide plate 42 reaches the blower blade 41.
1 tends to collide relatively violently. Therefore, it cannot be efficiently placed on the blower blade 41, and there is room for improvement in terms of discharge performance.

In addition, by colliding relatively violently with the blower blade 41, it may again fly out from the gap in the circumferential direction.

In addition, there is Utility Model Application Publication No. 55-159220 as a prior art document.

(Objective of the Invention) An object of the present invention is to improve snow removal processing ability by making it possible to efficiently send snow scraped by an auger to a blower blade without disturbing it.

(Technical Means for Achieving the Object) In order to achieve the above object, the present invention has a shape of each auger that extends from its base end in the circumferential direction toward the rotational direction, and that the tip end is axially The spiral shape is inclined outward in the direction of rotation, and the tip of each auger is spaced a certain distance in the axial direction from the base end of the adjacent auger in the direction of rotation, and is constant in the circumferential direction. They are extended in the rotational direction so that their widths overlap, or, if there is no width overlap, the distance between the auger tip and the auger base end in the rotational direction is kept below a certain width.

(Function) When the rotating shaft rotates, the snow shoveled from the opening by the auger tip passes through the guide passage formed between the auger base end and the adjacent auger tip, so it is smooth and undisturbed. The snow flows into the blower blade inside the case, and is efficiently discharged from the snow throwing spout in the desired direction by the blower blade.

(First Embodiment) Fig. 3 shows an example of application to a single auger type small snow blower. 5 is formed,
An engine 2 is attached to the rear end of the rod 3, and an operating handle 6 is fixed to an intermediate portion of the rod 3. A drive shaft (not shown) is supported within the rod 3 , the rear end of the drive shaft is operatively connected to the output shaft of the engine 2 , and the front end of the drive shaft extends into the reducer 4 .

A horizontal rotating shaft 10 extending forward is supported in a cantilevered manner on the front surface of the reducer 4, and the rear end of the rotating shaft 10 is connected to the Rod 3
It is interlocked and connected to the drive shaft inside. For example, three floor blades 11 are fixed to the rotating shaft 10 at equal intervals in the circumferential direction.

The blower blades 11 extend radially outward from the rotating shaft 10, and the rear end of each blower blade 11 extends radially outward from the rotating shaft 10.
It is welded to the back plate 13 that is perpendicular to.

The axial center of the back plate 13 is welded to the rotating shaft 10.

A base end 12a of an auger 12 is attached to the front end of each blower blade 11, and the auger 12 extends from the base end 12a in the rotational direction R side along the circumferential direction. It is formed in a spiral shape so that the portion 12b side is on the front side. An intermediate portion of the auger 12 is integrally connected to the front end of the rotating shaft 10 by a stay 14.

The case 15 that covers the blower blades 11 and the auger 12 is integrally provided with a bottom plate portion 15b at the rear end, and the bottom plate portion 15b is fixed to the front surface of the speed reducer 4. An end opening 17 is formed in the front end surface of the case 15, and a peripheral opening 19 is formed in the left side peripheral surface of the case 15, for example, when viewed from the rear, and extends over the entire length of the case 15 in the axial direction. 15 is formed in a partially cylindrical shape.

A snow-throwing opening 18 is formed on the upper end surface of the case 15 and has a snow-throwing opening 18 that substantially corresponds to the axial length of the blower blade 11 .

FIG. 1 is a front view of the front end (snow removal section) of the snow blower. In FIG. A shooter 20 is fixed to the vehicle, which extends upward to the left when viewed from the rear. The back plate 13 is formed into a generally triangular disk shape when viewed from the front, and each blower blade 11 is formed radially so as to extend from the rotating shaft 10 to each vertex of the triangle of the back plate 13.

According to the present invention, the distal end portion 12b of each auger 12 extends so as to overlap the proximal end portion 1.2a of the adjacent auger 12 in the rotation direction R by a constant width W in the circumferential direction.

FIG. 2 is a developed view of the auger 12 viewed from the outside in the radial direction.
2b and the proximal end 12a of the adjacent auger 12 overlap in the circumferential direction and are also spaced apart from each other in the axial direction, thereby forming a snow guide passage Q. Further, the stay 14 has a triangular cross-sectional shape and is formed so that the slope on the rotation direction R side is gentle, so that snow is fed in more smoothly.

Next, snow removal work will be explained. As shown in FIG. 4, the worker hangs the main body 5 from his shoulder using the belt 21.
Grip and operate the handle 6.

First, the snow in front of the snow removal section is crushed by the auger 12 through the end face opening 17 at the front end, and is scraped into the case 15 in FIG. 3 through the guide passage Q in FIG. It is released to the upper left through the inside of 20. Also, by swinging to the left, the snow on the left side is shoveled by the blower blades 11 through the circumferential opening 19, thereby removing the snow. When removing the snow in front, the snow crushed by the auger 12 is separated from the auger tip 12b and the adjacent auger base 12a.
By passing through the passage Q between them, the air is sent to the blower blade in an orderly manner without being disturbed. Therefore, the snow does not scatter much, is efficiently carried on the blower blades 11, and can be properly discharged from the snow dumping port 18 to the outside.

Further, by forming the passage Q, even if the snow hits the blower blade 11 and bounces back, the snow will not flow back into the opening 17.

Note that it is also possible to move the snow removal section forward while swinging it left and right to remove snow on the sides and remove snow in front.

In particular, when the end face opening 17 and the circumferential face opening 19 are provided, the operator can remove snow over a wide range without expanding his or her movement range as described above.

(Second Embodiment) FIG. 6 shows an example in which the present invention is applied to a so-called tandem auger type small snow blower having one pair of left and right blower blades 11 and augers 12. In FIG. 6, the reducer 4 is located at the center in the left-right direction inside the case 15, and the rotary shaft 10 extends horizontally from the reducer 4 in both left and right directions, and blower blades 11 are fixed to each of them. The augers 12 are respectively attached to the outer ends of the floor blades 11 in the axial direction, and extend spirally in the rotation direction R side.

The case 15 has a circumferential opening 19 formed on its front surface, and end openings 17 formed at both left and right ends. Case 15
A snow throwing port 18 is provided on the upper end surface of the blower blade 11 in a manner corresponding to the axial width of the blower blade 11 .

In FIG. 5, which is a left side view of the snow blower shown in FIG. 6, the chute 20 is formed on the upper end surface of the case 15 so as to extend generally forward and upward.

The tip end 12b of each auger 12 overlaps the base end 12a of the adjacent auger 12 on the rotational direction R side by a certain width W in the circumferential direction, and also in the axial direction as shown in FIG. It has a certain distance.

The method of working in this example is shown in FIG.
Although it is substantially the same as the first embodiment, since it has end face openings 17 at both left and right ends, it is possible to shovel snow from the sides even when swinging to the left or right, further improving work efficiency.

(Other Embodiments) (1) Although the above-described embodiments are applied to a snow blower having an end opening and a circumferential opening, the present invention can also be applied to a snow removing machine having only an end opening.

(2) In the illustrated embodiment described above, the auger is formed integrally with the blower blade, but the auger can be made separate from the blower blade and independently attached to the rotating shaft or attached to the blower blade.

(3) Figure 8 shows a modified example of the auger.
The radial width D2 of the blower blade 11 is the radial width DI of the blower blade 11.
It has been narrowed down to the following.

If the radial width of the auger 12 is increased as shown by the imaginary line,
In the case of (D3), the intake port S for taking in air becomes smaller and it becomes difficult to take in the amount of air necessary for throwing snow from the chute. 12 radial width of the blower blade 11
When the radius D2 is set to be less than or equal to the width D1, a sufficient amount of air necessary for throwing snow from the chute can be taken in, and snow suction performance and snow throwing performance are improved.

(4) Unlike the normal auger function, in the present invention, the 12 tips 12C of the auger are used as rotating scraping blades, and when the auger rotates at the speed of the rotational speed variation, the same speed is removed from between the augers. The snow will be shoveled in. In FIG. 9, the length H extending in the rotational direction R side from the auger stay 14 is set to be less than or equal to the radial width D2 of the auger 12, thereby increasing the rigidity of the auger tip 12c.

(5) FIG. 10 shows an example in which the augers 12 are arranged so as to extend along the same circumference.

According to this structure, snow is crushed by the cutting blade of the tip 12c, so compared to the type where the tip side of the auger 12 leans toward the rotation axis as shown in the imaginary line, the snow is crushed by the radial outer peripheral edge 12d of the auger during work. The snow surface reaction force is kept to an extremely low level, improving the stability of the snow blower during operation.

(6) In Fig. 11, the auger stay 14 is formed into a modified V-shape in cross-section, with the tip 14a facing toward the rotational direction R and the axially inner slope being a gentle slope 1"4b, so as to guide snow. I have to.

According to this structure, the shoveled snow is smoothly guided to the floor blade side along the slope 14b.

(7) In FIG. 12, the auger stay 14 is formed into a deformed V-shape in cross section, the tip 14a is directed toward the rotation direction R side, and the axially inner slope is a gentle slope 14b, and the tip of the stay in the rotation direction The cutting edge 14a is sharply formed.

According to this structure, snow can be crushed and scraped by the cutting blade 14a of the stay 14 as well as by the tip 12c of the auger 12, and the ability to crush and scrape snow is improved.

(8) FIG. 14 is an example in which the distance A between each auger tip and the adjacent auger base end on the rotational direction side is kept below the radial direction of the auger. If the distance A is kept within a certain range as in this example, effects similar to those of the first and second embodiments can be achieved.

(Effects of the Invention) As explained above, the present invention has the shape of each auger such that it extends from its base end in the rotational direction along the circumferential direction, and that its tip end is on the outer side in the axial direction. It has a slanted spiral shape, and the tip of each auger is spaced apart from the base end of the adjacent auger in the rotational direction by a certain distance in the axial direction, and in the rotational direction so that the rings overlap by a certain amount in the circumferential direction. When the wheels are extended or there is no overlap, the distance between the auger tip end and the auger base end in the rotational direction is kept below the auger width, so there are the following advantages.

(1) The snow crushed by the auger tip is guided by the guide passage formed between the auger tip and the adjacent auger base and is sent to the blower blade inside the case.
It is efficiently and undisturbedly supplied to the blower blades within the case, can be carried on the blower blades without scattering too much, and can be efficiently discharged from the snow throwing spout.

That is, the crushed and shoveled snow can be efficiently discharged in a desired direction, improving snow removal performance.

(2) The tip of the auger, which functions as a rotating scraping blade, forms a guide passage with a certain distance in the axial direction and a certain width in the circumferential direction between the base end of the adjacent auger. So,
Even heavy snow is reliably raked onto the blower blade surface by the auger tip. Furthermore, even if some of the shoveled snow bounces back due to collision with the blower blade and flows back, this can be prevented by the guide passage portion.

In other words, the shoveled snow will no longer escape from the opening again.
Scratching performance is improved.

[Brief explanation of the drawing]

Fig. 1 is a front view of a first embodiment of a small snow blower to which the present invention is applied, Fig. 2 is a developed view of the auger shown in Fig. 1 viewed from the outside in the radial direction, and Fig. 3 is a Overall view (left side view),
Figure 4 is a perspective view showing the working condition of the snow blower in Figure 1;
The figure is a left side view of the second embodiment, FIG. 6 is a top view partly in section of the same snow blower as in FIG. 5, FIG. 7 is a perspective view showing the working state of the snow blower in FIG. FIG. 8 is a partial perspective view showing a modified example of the auger, FIGS. 9 and 10 each show another modified example of the auger, and FIGS. 11 and 12 are side views of the auger as seen in the axial direction. 13 is a side view of the conventional example, and FIG. 14 is a radially outward view showing another modified example of the auger. This is a developed view seen from the front. 5... Snow blower main body, 10... Rotating shaft, 11... Blower blade, 12... Auger, 12a... Auger base end, 12b... Auger tip, 17... End surface Opening Fig. 1 Fig. nG P Fig. 74- Fig. 70

Claims (7)

[Claims] (1) A horizontal rotating shaft is equipped with a plurality of blower blades at intervals in the circumferential direction, and the base end of a snow shoveling auger is connected to the axial end of each blower blade, and the blower blades and auger are connected to each other. In a small snow blower in which a snow shoveling opening is formed on the end face of the covering case on the auger side, each auger has a shape that extends from its base end toward the rotational direction along a substantially circumferential direction, and has a distal end thereof. The spiral shape is inclined outward in the axial direction, and the tip of each auger is spaced a certain distance in the axial direction from the base end of the adjacent auger in the direction of rotation, and in the circumferential direction. A compact snow blower characterized in that the auger tip portion and the adjacent auger base end portion in the direction of rotation are arranged so that they overlap each other by a certain width, or if there is no width overlap, the distance between the auger tip portion and the adjacent auger base portion on the rotation direction side is set to be equal to or less than the auger width. (2) A small snow blower according to claim 1, wherein a large number of saw-shaped cutting blades are formed at the tip of each auger. (3) A small snow blower according to claim 1 or 2, wherein the radial width of the auger is smaller than or equal to the radial width of the blower blade. (4) A portion near the tip of the auger in the rotational direction is supported on the rotating shaft by an auger stay that extends inward in the radial direction, and the auger is extended from the auger stay portion toward the rotational direction to form a cutting blade at the tip, and from the auger stay portion to the auger tip. A small snow blower according to claim 1, 2 or 3, wherein the circumferential length of the auger is equal to or less than the radial length of the auger. (5) A small snow blower according to claim 1, 2, 3, or 4, wherein each auger is formed to extend along the same circumference. (6) A portion of the auger near the leading end in the rotational direction is supported on the rotating shaft by an auger stay extending radially inward, and a guide surface is formed on the axially inward side of the auger stay. A small snow blower according to paragraph 2, paragraph 3, paragraph 4, or paragraph 5. (7) Claims 1 and 2, in which a portion near the leading end of the auger in the rotating direction is supported on the rotating shaft by an auger stay extending radially inward, and a cutting blade is formed at the leading edge of the auger stay in the rotating direction, Section 3, Section 4, Section 5, or Section 6
The small snow blower mentioned in section.