FI81410C - SLUNGHJUL FOER EN SNOESLUNGA. - Google Patents

Description

81410

Snow thrower centrifuge wheel

The invention relates to a centrifugal wheel of a snow thrower which is placed in a housing and which comprises a shaft 5 mounted substantially in the direction of travel and flexible snow throwers attached thereto, and which, by rotating the centrifugal wheel, ejects snow from the housing by centrifugal force.

The disadvantage of a fixed-wing snow thrower is that the wings of the centrifuge wheel are twisted when a relatively small obstacle, such as a stone or piece of wood, enters the centrifuge. If the throwing wheel breaks or twists, it will cause vibration, excess strain on the bearings, and deterioration of the spin result.

15 Finnish patent publication 42580 discloses a snow thrower mounted in front of a tractor and having two centrifugal wheels without a cover. The snow throwing vanes of the centrifuge wheels consist of steel rope pieces that are tied together. The centrifuge throws snow on both sides of the road at both wheels 20 of the tractor. The centrifuge is not suitable and is not intended for normal snow creation in agglomerations where snow must be removed precisely from a certain area and in a certain direction.

Finnish patent application 2893/71 discloses a centrifugal wheel, the throwing members of which consist of three parts, a fastening part, a resilient part and a tip part. The flexible structure is intended to protect the centrifuge when the above-mentioned obstacles get into it. However, since the fastening part is up to half the length of the entire wing, it is subjected to considerable stresses when a piece of stone or a piece of wood collides with it and may nevertheless break. The structure of the wing is quite complex.

The object of the invention is to provide a simple and more reliable centrifugal wheel which actually withstands the stresses caused by hard objects 35. The main features of the invention are set out in the appended claim 1. Hitherto, it has not been possible to make a functional wing which is flexible along its entire length, since such wings are easily entangled with one another. According to the invention, entanglement is prevented 2 81410 by placing a support plate behind the wings and tying at least the first two chains together.

In practical experiments, it has been found that 5 snow packs behind the support plate. This problem is most preferably eliminated by the means of claim 2.

Especially when using link chains, the embodiment according to claim 3 is preferred. The chain element 10 according to the invention is simple and inexpensive. The replacement of the chain then takes place simply by removing the rod, so that all the chains it supports drip and the defective chain can be replaced with a new one.

The invention will now be illustrated by reference to the accompanying drawings, which show an embodiment of the invention.

Figure 1 shows a front view of the centrifuge Figure 2 shows a cross-section of the centrifuge 20 Figure 3 shows a cross-section of the centrifuge wheel

The centrifuge is attached to the rear of the tractor with a normal three-point hitch. For this purpose, the centrifuge has lugs 18 and the articulated shaft of the transmission is connected to the end 19 of the shaft 3 25 of the centrifuge wheel 1, Fig. 1. The operation of the centrifuge is normal in principle. The snow hitting the putty 9 is transferred by a feed thread 16 to the throwing members, which throw the snow to the side through the blowing pipe 10.

The shaft 3 of the centrifugal wheel 1 is fixed by means of bearings 12 and 13 to the front of the jaw 9 and to the rear of the housing 11. The feed threads 16 are fastened to the front part of the shaft 3 by means of clamps 17. The fastening is done by pressing, so that it can slip if necessary.

At the rear of the shaft 3 there are throwing members or chains 2. There are 8 of them lengthwise in the circumference and always 6 in one circumference. The ends of the chains have plate-like tips 4. There are 35 behind the chains 2

Claims (3)

3 81410 a support disc 7 fixedly fixed to the shaft 3, the function of which is to prevent the chains from becoming entangled. For the same reason, the tip 6 of the first two chains 5 is common. The fastening of the chains 2 is carried out as follows, Figures 2 and 3. A number of discs 14 with holes corresponding to the rods 15 are welded to the shaft 3. When the end disc is removed, the rods 15 can be pulled out, whereby the end loops of the chains 2 can be threaded one at a time when the rod 15 is pushed back. The discs 14 10 divide the chains 2 longitudinally into groups of two, whereby their axial displacement is quite small. The invention can be applied in many ways different from those described above within the scope of the principle set out in the claims. 15 In practice, all the chains in the same row can be formed of at least one long chain which is attached to the shaft at several points. The spacing of the attachment points then forms the chain fragments according to the invention. 20 A centrifugal wheel (1) for a snow thrower, which is placed in a housing (11) and comprises a shaft (3) mounted substantially in the direction of travel and flexible snow throwers attached thereto, and by rotating the centrifuge wheel (1) consist essentially of chains (2) attached at one or both ends to a shaft (3) and having free-end tips (4) at their free ends, characterized in that in the direction of travel the rear disc (1) of the housing includes a support disc ( 7) and the at least two first chains (5) comprise a common tip piece (6). 35 Centrifugal wheel (1) according to Claim 1, characterized in that small vanes (8) are mounted behind or on the support disc (7) close to the shaft (3). 4,81410 Spinning wheel (1) according to Claim 1 or 2, characterized in that the fastening of the chains (2) to the shaft (3) is arranged by means of rods (15) parallel to the shaft (3), which are fastened by means of a plurality of discs (14). always limit the axial movement of the nearest chain and thus group the chains in the longitudinal direction of the axis. 10