JPS6133060Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a one-stage rotary snow blower that shovels and throws snow using an auger with blades attached to a rotating shaft.

Generally, a rotary snow blower uses a rotating mechanism to cut down and shovel accumulated snow, and then applies kinetic energy to throw the snow. There are two types of rotary snow blowers: a two-stage rotary snow blower that uses a two-stage mechanism to shovel snow with an auger and a blower to throw snow, and a one-stage rotary snow blower that uses a single rotary mechanism to shovel snow and throw snow. There are stage-type rotary snow blowers. The one-stage rotary snow blower can be divided into two types: an auger type with blades attached to the rotating shaft and a blower type with blades having a special curved surface.

By the way, when downsizing a rotary snow blower, a one-stage snow blower is effective because the structure is simple and the rotary mechanism can be lightweight.

However, in the conventional one-stage rotary snow blower of the auger type mentioned above, augers are arranged on the left and right sides of a gearbox attached to the center of the snow removal frame, and only one end of the auger is Because it is connected to the drive shaft inside the gearbox and supported so that it can rotate freely, the left and right augers are supported cantilevered at the center of the snow removal frame, and when an uneven load is applied to the auger during snow removal work, the steering There is a problem in that the strength of the support part of the auger is weak when a lateral load is applied. Therefore, it is difficult to apply it to heavy-duty snow removal work, and the above-mentioned problem is particularly serious in ride-on snowplows.

Moreover, if the auger is supported on both sides of the snow removal frame, the above-mentioned problem can be improved, but this also has problems. In other words, during manufacturing and assembly, it is necessary to accurately control the vertical and horizontal directions of the auger relative to the snow removal frame, as well as the perpendicularity of the auger to the bearings on both sides of the snow removal frame, making it difficult to center the auger. problem and
The problem is that it is not possible to escape or buffer against external loads during work operation, which affects the strength of the drive device, especially the input shaft of the auger.

This idea was made based on the above background.A gearbox with a horizontal drive shaft is provided in the center of the snow removal frame, bearings are provided on the left and right sides of the snow removal frame, and there is a space between the drive shaft and the bearing. , by providing an auger with blades attached to the rotating shaft, one end of the rotating shaft being pivotally connected to the bearing, and the other end being connected to the driving shaft via a universal joint, so that the auger can rotate freely in the circumferential direction, To provide a one-stage rotary snow blower whose auger can be easily assembled, thereby reducing assembly cost, and whose structure can be strengthened by supporting both ends of the auger.

This invention will be explained below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of this invention, and numeral 1 in the figures represents a vehicle body. A snow removal frame 3 equipped with a snow throwing tube 2 is provided at the front of the vehicle body 1, on the left side in FIG. However, it is possible to operate an auger 22, which will be described later, to remove snow as usual.

At the center of the snow removal frame 3, a gearbox 6 horizontally equipped with a drive shaft 5 rotated by a drive device (not shown) is supported by a support arm 7. A bearing 8 is supported by a support member 9 and is provided on the left and right sides of FIG. Also, inside the gearbox 6 is an input shaft 10.
One end of the input shaft 10 is fitted through a conical roller bearing 11, and the other end of the input shaft 10 is rotatably supported by a pillow-type unit bearing 13 provided on the snow removal frame 3 through a vibration isolating rubber 12. There is. The input shaft 10 is driven by a drive device (not shown) to rotate the drive shaft 5 via bevel gears 14 and 15.

Further, between the drive shaft 5 and the bearing 8, an auger 22 having blades 21 attached to a rotating shaft 20 is provided.
One end 20a of the rotating shaft 20 is pivotally connected to the bearing 8 via a conical roller bearing 23, and the other end 20b is connected to the drive shaft 5 via a universal joint 40, which will be described later, so that it can freely rotate in the circumferential direction. are provided in each.

By the way, the drive shaft 5 and the other end 2 of the rotating shaft 20
As shown in detail in FIG. 4, the connecting portion A of the rotary shaft 20 is attached to a support member 25 that has a rounded step 25a on the outer periphery and is attached to the drive shaft 5 via a nut 26. The rotating shaft 20 is supported via a cylinder 28 attached to the other end 20b, and a flange 27 provided on the outer circumference of the cylinder 28 and a flange 29 provided on the drive shaft 5
However, on the flexible plate 30 provided between each,
Bolt 3, making sure that the flanges do not overlap.
1. It is attached via a nut 32. A kind of universal joint 40 is constituted by the supporting member 25, the cylindrical body 28, and the flexible plate 30 attached as described above, and the rotating shaft 20
can move freely to some extent with respect to the drive shaft 5.

Next, the operation of the one-stage rotary snow blower according to the invention constructed as described above will be explained.

Snow removal is carried out by operating the auger 22 while the vehicle body 1 is running at a slow speed, as described above. At this time, an uneven load may be applied to the auger 22,
Even if a lateral load is applied due to steering, the auger 22 will not rotate at one end 20a of its rotating shaft 20.
to the bearing 8 of the snow removal frame 3, and the other end 20b to the drive shaft 5.
Because it is configured as a double-sided support supported by the auger 22, the strength of the support part of the auger 22 does not weaken, making it suitable for heavy snow removal work and ride-on type snowplows (unlike small hand-guided snowplows, the steering lateral load is large). is also fully applicable.

Furthermore, even if an external load is applied to the auger 22, since one end of the rotating shaft 20 of the auger 22 is connected to the drive shaft 5 via the universal joint 40, the external load applied to the auger 22 can be sufficiently absorbed by the rotating shaft 20. The connecting portion A between the drive shaft 5 and the drive shaft 5 can provide a buffer. Therefore, sufficient escape and buffering against external loads can be achieved, and the strength of the drive device, particularly the input shaft 10, is not affected.

Moreover, it is not necessary to press the auger 22 vertically and perpendicularly to the snow removal frame 3 and the perpendicularity of the auger 22 to the left and right bearings 8 of the snow removal frame 3 with particular precision during manufacturing and assembly. Assembly work is easy and assembly costs can be reduced.

Further, the input shaft 10 has a vibration-proof rubber 1 mounted on the snow removal frame 3.
Pillow type unit bearing 13 provided via 2
Because it is supported by

As explained above, in the one-stage rotary snow blower of this invention, the auger with blades attached to the rotating shaft supports both ends of the rotating shaft, and connects one end of the rotating shaft via the universal joint. Since it is configured to be connected to the drive shaft, centering work during auger assembly can be simplified, and assembly costs can be reduced. In addition, since the structure can be strengthened by supporting both ends of the auger, it is effective in developing small rotary snow blowers using agricultural tractors, etc., and has the excellent effect of being able to be provided to users at low cost.

[Brief explanation of the drawing]

1 to 6 show an embodiment of this invention, in which FIG. 1 is a front view of a one-stage rotary snow blower, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof. FIG. 4 is a cross-sectional view of the main part near the gearbox, FIG. 5 is a cross-sectional view near the bearing, and FIG. 6 is a side view of the pillow-type unit bearing. 1...Vehicle body, 2...Snow throwing tube, 3...Snow removal frame, 5
... Drive shaft, 6 ... Gearbox, 7 ... Support arm, 8 ... Bearing, 9 ... Support member, 20 ...
Rotating shaft, 20a...one end, 20b...other end, 21
...Blade, 22...Auger, 40...Universal joint.

Claims (1)

[Scope of utility model registration request] A gearbox with a horizontal drive shaft rotated by a drive device is installed in the center of a snow removal frame equipped with a snow throwing tube and installed at the front of the vehicle body, and is supported by a support arm. Bearings are provided on the left and right sides supported by support members, and
Between the drive shaft and the bearing, an auger with blades attached to the rotary shaft has one end of the rotary shaft pivotally connected to the bearing, and the other end connected to the drive shaft via a universal joint in the circumferential direction. A one-stage rotary snow blower characterized in that each rotary snow blower is rotatably installed in a rotary snow blower.