US2369293A - Snow hurler - Google Patents

Description

Feb- 13, 1945- J. GTZLINGER SNOWHURLER Filed Sept. 18, 1942 ffl:

In ven for am/w GzL V65/P lllllllllllll|||||ll|IIIIIIIIIIIIIIIHH Atorney Patented Feb. 13, 1945 SNOW KURIER Julius Gtallnger, Vasteras, Sweden Application September 18, 1942, Serial No. 458,896

In Sweden March 30, 1942 f 4 claims. (ci. 37-43) The present invention relates to motor-driven snowhurlers which are transportable, either through their own propulsion arrangement, or by means of locomotive, motor car, tractor or other vehicle, which pushes the hurler before it. In i this manner the snow is pressed down with or without the aid of a special feeding arrangement into the discharge motor of the hurler and is thrown upwards and sideways by the same.

The use of a special feeding arrangement involves great advantages, especially due to the fact that the discharge rotor of the hurler can be made smaller and its revolutions per minute increased.

Generally the feeding arrangement consists of cylindrical endless screws. These are driven by the motor of the hurler, for instance by means of chain gears, and are in pairs right and leftthreaded for the purpose of carrying snow from sumed to be placed either on the framework: of the hurler proper or on the vehicle which propels the same. The power is transmitted by means of a bevel gear I to the shaft .2 which lies in a horizontal plane and lengthwise of the hurler and drives the discharge rotor l rotating in housing 3. Housing 3 is provided with an exit chute 3a for the discharge of snow. The same shaft 2 extending centrally through the feeding opening of the rotor drives the two conical feeding screws 1 and 8 by means of the conical bevel gear 5 running in housing 6. As will be seen in Fig. 2,

bevel gear 5 drives an idler 5a which drives pinion` 5b, rigid with blade 8, in one direction and which, f

l5 in turn, drives pinion 5c rigid with blade 1 in the the sides -to the central opening of the discharge rotor. The shafts of the screws, usually two in number, are arranged in parallel over each other and perpendicularly against the travelling direction of the hurler, The chain mentioned above is usually arranged in the side pieces 0f the frame of the hurler.

Such a feeding arrangement has several drawbacks. The screws work against each other whereby the eiiiciency will be low. The snow is not carried directly into the discharge rotor of the hurler but only towardsthe opening and is thrown forwards when the speedv of the screws is increased. The screws are only partly filled with snow, the end, especially those on the upper screw, are not utilized. 'Ihe chain gears placed at the sides prevent convenient arrangement of the pivotable transport wheels, etc. i

According to the present invention the feeding arrangement of the snowhurler consists of two conical feeding screws in front of the feeding opening of the hurler and driven by the shaft of the discharge rotor. The shafts of the feeding screws are directed forwards, forming an obtuse angle with the driving shaft of the rotor, and at the same time being inclined downwards so that their angle with the horizontal plane will be equal to half the conical angle of the feeding screws.

By means of this arrangement the drawbacks mentioned above are avoided and, besides, other important advantages are obtained, which will more clearly be seen from thefollowing description. This relates to the attached drawing showing a form of arrangement in the invention seen from the front in Fig. 1 and from above, partly in section, in Fig. 2.

The driving motor of the snowhurler is asopposite direction. Idler 5a is supported on inner` shaft Ib upon which tubular shaft 1a and pinion 5c are rotatably mounted. The feeding screws are rightand left-threaded respectively. Each screw 1, 8 consists of a cylindrical shaft and a helical plate attached thereto, the outline of the screw lying on the surface of an imaginary acute cone, the base of which is turned towards the feeding opening of the discharge rotor and the apex of which is directed forward and outward therefrom. The shafts of the screws thus form an obtuse angle with the shaft of the discharge rotor, but at the same time they are :inclined downwards so that their angle with the horizontal plane is equal to half that of the said feeding screw cone. When the screws rotate the snow is carried from the sides towards the feeding opening of the hurler into which it is led practically in an axial direction as a result of the shafts of the screws being directed forwards. This effect is strengthened by screens 9 arranged behind the screws. These screens being thus :inclined towards the feeding opening of the hurler further contribute to the conducting of the snow towards the feeding opening when the hurler is travelling through snow. The position of the shafts of the screw lightens the propulsion of the machine,i. e, the'power of the propelling motor is partly utilized for the feeding.

On account of the conical shape of the screws, these are, moreover, fully utilized as their cross section is increased in the same proportion as the snow is accumulated towards the central part of the hurler.

The snowhurler runs onqtwo transport wheels I0 journalled in casters I2. which are mounted in bearings I3 aflixed on the side beams II of the framework of the hurler. The casters I2 are pivotable in bearings I3 about vertical axes so that the wheels may turn. as indicated by the shaft on the discharge rotor of the hurler, the sides are free from chain gears and the like for transmission of power to the screws. This fact simplifies the jour-nailing of the transport wheels and is of special importance when it is a question of keeping the width of the framework within certain permissible limits and especially when the transport wheels are pivotable.

In order to enable the feeding screws to come as near as possible to the intake opening of the hurler, they are turned half a turn inrelation to each other. The inner ends of the screws thus intercouple with each other and can therefore crush larger pieces of ice which may follow the snow. l

I claim:

1.v In a snowhurler of the character described, comprising, in combination, .a discharge rotor having a shaft disposed horizontally and lengthwise of the hurler, a pair of conical feeding screws formed on shafts and arranged in front of the feeding opening of and driven from the shaft of said rotor, the outline of each feeding screw being coincident with the surface of an imaginary acute cone lying on its side, the base of which is turned towards the feeding opening and the apex of which is directed forwards and outwards, so that the shafts thereof form an obtuse angle with the shaft of the rotor and, being inclined downward, their angle with the horizontal plane equals half that of said imaginary cone.

2. In a snowhurler of the character described, comprising, in combination, s. discharge rotor having a shaft disposed horizontally and lengthwise of the hurler and extending forwardly through the feeding opening thereof, a conical bevel gear on the extended end of said shaft, av

pair of conical feeding screws formed on shafts and arranged in front of said feeding opening and driven by said gear, the outline of each feeding screw being coincident with the surface of an imaginary acute cone lying on its side, the

base of which is turned towards said feeding open ing andthe apex of which is directed forwardsl and outwards, so that said screw shafts form an obtuse angle with said rotor shaft and, being inclined downward, their angle with the horizontal plane equals half that of said imaginary cone.

- 3. In a snow hurler of the character described, comprising, in combination. a discharge rotor having a shaft disposed horizontally and lengthwise of the hurler, 'a pair of conical feeding screws formed on shafts and arranged in front of the feeding opening of and driven from the shaft of said roto ,the outline of each feeding screw being coincident with the surface of an imaginary acute cone lying on its side, the base of which is turned towards said feeding opening and the apex of which isfdirected forwards and outwards, so that said screw shafts form an obtuse angle with said rotor shaft and, being inclined downward, their angle with the horizontal plane equals half that of said imaginary cone, and said feeding screws being turned halfa turn in relation one to the other.

4. In a snowhurler of the character described. comprising, in combination, a discharge rotor having a shaft disposed horizontally and lengthwise of the hurler, a pair of conical feeding screws formed on shafts and arranged in front of the feeding opening of and driven from the shaft of said rotor, the outline of each feeding screw being coincident with the surface of an imaginary acute cone lying on its side, the base of which is turned towards the feeding opening and the apex of which is directed forwards and outwards, so that said screw shafts form an obtuse angle with said rotor shaft and, being inclined downward, their angle with the horizontal plane equals half that JULrUs G'rzuNGER.

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