JPS6327609A - Blower of snow removing machine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a blower for a snow blower, and more specifically to a blower that can reduce the impact caused by foreign objects such as stones being caught during snow throwing. Regarding snow blower blowers.

(Prior Art) There is a so-called two-stage type snow blower, which is configured as follows. That is, an auger is provided that crushes accumulated snow, and a blower is provided that sends the snow crushed by the auger together with air to a snow throwing chute.

The snow fed into the snow throwing chute is guided by the snow throwing chute and discharged in a desired direction.

Conventionally, such a blower is shown in FIG. 5. To explain this with a diagram, the blower 31 has a cylindrical box-shaped casing 32, and one axial end of the casing 32 is open toward the orca. Further, a discharge port 33 is formed that extends from the outer peripheral surface of the casing 32 upward in the tangential direction of the casing 32 (in the direction of arrow U in the figure) and communicates with the snow chute. Furthermore, a rotary blade 34 is provided inside the casing 32, which rotates approximately coaxially with the casing 32 and rotates in the forward direction (direction of arrow R in the figure) in the direction in which the discharge port 33 extends. The rotating blade 34 sends the snow from the auger together with air into the snow throwing chute through the outlet.

(Problems to be Solved by the Invention) By the way, during snow removal work, foreign objects such as stones are sent into the blower 31 together with snow, so this foreign object may be between the inner circumferential surface of the casing 32 and the outer circumferential end of the rotary blade 34. It may bite. In this case, the gap size d between the inner circumferential surface of the casing 32 and the outer circumferential end of the rotating blade 34 is narrow, while the radially outer side of the rotating blade 34 is open in a portion corresponding to the discharge port 33. .

Therefore, the rotary blade 34 rotates, and from the position of the discharge port 33 whose radially outward side is opened, the opening edge 33a of the opening edge of the discharge port 33 on the front side in the rotational direction of the rotary blade 34 is moved.
The gap between the casing 32 side and the outer peripheral end of the rotary blade 34 suddenly becomes narrower. Therefore, if a foreign object gets caught between the opening edge 33a and the rotary blade 34, a large impact will be applied to the casing 32 and the rotary blade 34, which may seriously damage them.

(Purpose of the Invention) This invention was made in view of the above-mentioned circumstances, and is aimed at weakening the impact when foreign matter gets caught in a blower.
The purpose is to prevent damage to the casing and rotating blades of the blower.

(Structure of the Invention) A feature of the present invention for achieving the above object is that the inner peripheral surface of the casing located near the discharge port and on the forward side in the rotational direction of the rotary vane from the discharge port is connected to the rotary vane. The point is that the rotary blade gradually moves away from the outer circumferential end locus of the rotary blade toward the rear in the rotational direction and connects to the discharge port.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Figures 2 and 3, 1 is a snow blower, and the arrow Fr in the figure
indicates the front of this snow blower l. Reference numeral 2 denotes a vehicle body frame, and this vehicle body frame 2 is supported by a traveling section '3, and this traveling section 3 is capable of traveling on a snow removal work surface. Further, a snow blower main body 4 is supported at the front part of the vehicle body frame 2, and an engine 5 supported by the vehicle body frame 2 drives the traveling section 3 and the snow remover main body 4.

At the rear end of the vehicle body frame 2, there is a pair of left and right handles 6.
A handle 6.6 is provided in a protruding manner, and snow removal work by the snow blower 1 is performed by an operator grasping this handle 6.6.

The running section 3 includes a drive wheel 8 driven by an engine 5, a driven wheel 9 located behind the drive wheel 8, and both wheels 8.
．． It has a crawler 10 that is wound around the roller 9. When the drive wheels 8 are driven by the engine 5, the crawler 10 rolls on the work surface.
runs on the work surface.

The snow remover main body 4 is a two-stage type having a snow collecting mechanism and a snow throwing mechanism, each of which is configured as follows.

That is, in the snow collecting mechanism, a snow-crushing auger 11 that rotates around an axis extending in the vehicle width direction is provided at the front end of the vehicle body frame 2.
I support this. On the other hand, a drive shaft 12 is provided that extends forward from within the vehicle body frame 2.
The rear end of the vehicle is driven by the engine 5 via a reduction gear (not shown).

The auger 11 is interlocked with the front end of the drive shaft 12, and the auger 11 is driven to crush accumulated snow. Further, a snow collecting cover 13 is provided to cover the rear of the auger 11, and this snow collecting cover 13 collects the snow crushed by the auger 11 to the central part in the vehicle width direction as the running section 3 moves forward.

On the other hand, the snow throwing mechanism is provided with a blower 15 that sends the snow crushed by the auger 11 and collected by the snow collecting cover 13 to the snow throwing chute 14 together with air. The snow-throwing chute 14 guides the snow in a predetermined direction and releases it.

The blower 15 will be described with reference to FIGS. 1 to 3. The blower 15 has a cylindrical box-shaped casing 16 whose axis extends in the front-rear direction. This casing 16 is connected to the rear surface of the center portion of the snow collecting cover 13 in the vehicle width direction, and the front end of this casing 16 opens toward the auger 11 inside the snow collecting cover 13. Further, a discharge pipe 17 having a circular cross section is provided on the outer peripheral surface of the casing 16.
The inside of this discharge pipe 17 serves as a discharge port 18. This discharge pipe 17 is directed upward in the tangential direction of the casing 16 (arrow U in the figure).
direction) and is provided on the left side of the casing 16. The snow-throwing chute 14 is supported on the discharge pipe 17, and the lower part of the snow-throwing chute 14 communicates with the discharge port 18.

A rotary blade 19 is provided within the casing 16 coaxially with the casing 16 . The rotary blade 19 includes a boss portion 21 fitted onto the drive shaft 12, and a boss portion 21 that is fitted onto the drive shaft 12.
The rotary plate 22 is supported by a rotary plate 22, and three blade base bodies 23 extend over and protrude from the boss portion 21 and the rotary plate 22, and the blade base bodies 23 are arranged at equal intervals in the circumferential direction. . The rotating blade 19 rotates in the forward direction (in the direction of arrow R in the figure) in the direction in which the discharge pipe 17 extends upward.

When the auger 11 is driven by the drive shaft 12, the rotary blades 19 rotate along with the drive shaft 12. This rotary blade 19 passes the snow collected by the snow collecting cover 13 together with air through the discharge port 18 (snow throwing shoe) 1
Send it to 4.

In the above configuration, the inner circumferential surface 18a of the casing 16 located near the outlet 18 and further forward in the rotational direction of the rotating blade 19 than the parenthesized outlet 18 is formed as follows. That is, the inner peripheral surface 16a is formed so as to gradually move away from the outer peripheral end locus 24 of the rotary vane 19 toward the rear in the rotational direction of the rotary vane 19 (the direction opposite to the arrow R in the drawing) and to be connected to the discharge port 18. has been done. Further, in this case, the inner circumferential surface 16a of the casing 16 has an upwardly projecting arc shape.

Therefore, the dimension between the opening edge 18a of the discharge port 18 on the front side in the rotational direction of the rotary vane 19 and the outer peripheral end of the rotary vane 19 is the same as the general surface of the inner peripheral surface of the casing 16 and the diameter of the rotary vane 19. This is sufficiently large compared to the dimension d between the outer peripheral edge and the outer peripheral edge. Therefore, foreign matter is prevented from getting caught between the opening edge 18a and the outer peripheral end of the rotary blade 19. Furthermore, even if a foreign object enters between this area, the inner circumferential surface 16a of the casing 16 and the outer circumferential end of the rotary blade 19 in this area gradually approach each other as the rotary blade 19 rotates, so that the impact of foreign matter when bitten is can be kept small.

On the other hand, the snow-throwing chute 14 is supported on a discharge pipe 17 so as to be rotatable about a vertical axis. The snow throwing chute 14 is operated by being supported by the handle 6 via the worm gear 28 and the universal joint shaft 29. tied together. By rotating the lever 30 (arrow R in Figures 2 and 3), the snow throwing chute 14 can be rotated in the desired direction (arrow T in Figures 2 and 3).
), the snow throwing direction can be selected arbitrarily.

FIG. 4 shows another embodiment. In this embodiment, the inner peripheral surface 16a of the casing 16 is formed into a flat surface. The other configurations are the same as those in the previous embodiment.

(Effects of the Invention) According to the present invention, the inner circumferential surface of the casing located near the discharge port and on the forward side of the rotary vane in the rotational direction of the rotary vane increases as Since the outer peripheral edge is gradually separated from the trajectory and connected to the discharge port, the dimension between the opening edge of the discharge port on the front side in the rotational direction of the rotary blade and the outer peripheral end of the two-rotary blade is equal to the inner peripheral surface of the casing. It is larger than the dimension between the general surface and the outer peripheral end of the rotating blade. For this reason.

Foreign matter is prevented from getting caught between these opening edges and the outer peripheral end of the rotary blade. In addition, even if a foreign object gets caught in this area, the inner circumferential surface of the casing in this area and the outer circumferential edge of the rotating blade gradually approach each other as the rotating blade rotates, so the impact when it gets caught can be kept small. . Therefore, it is possible to weaken the impact when foreign matter gets caught between the casing and the rotating blades in the blower, and damage to the casing and the rotating blades is prevented.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention, FIG. 1 is a front sectional view of the blower, wIJ2 is an overall side partial sectional view of the snow blower, and FIG. 3 is an overall front partial sectional view of the same snow blower. figure,
FIG. 4 is a partial view of another embodiment, corresponding to FIG. 1, and FIG. 5 is a diagram of a conventional example, corresponding to FIG. 1. l...'Snow blower, 11...auger, 14Φ-snow chute, 15--blower, 161 casing, 16a-Φ inner peripheral surface, 18--discharge port, 18a--opening edge, 19--rotating vane , 24...Outer edge trajectory. Patent applicant Yamaha Motor Co., Ltd. Figure 4
, 8

Claims (1)

[Claims] 1. A cylindrical box-shaped casing with one axial end opening toward the snow-crushing auger is provided, and the casing extends from the outer peripheral surface of the casing in one tangential direction of the casing and communicates with the snow-throwing chute. a rotating shaft that rotates substantially coaxially with the casing and rotates in a forward direction in the direction in which the discharge port extends, and sends snow from the auger together with air through the discharge port and into the snow throwing chute; In a blower for a snow remover in which a blade is provided in the casing, the inner circumferential surface of the casing located near the discharge port and further forward in the rotational direction of the rotary blade than the discharge port faces rearward in the rotational direction of the rotary blade. Accordingly, a blower for a snow remover is characterized in that the rotary blades are gradually separated from the outer peripheral end locus and connected to a discharge port.