Endless belt power transmission systems or components – Friction drive belt – Including fabric web
Patent
1987-05-11
1988-11-22
Bui, Thuy M.
Endless belt power transmission systems or components
Friction drive belt
Including fabric web
474205, F16G 108
Patent
active
047862734
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates generally to mechanical engineering, and more particularly to cogged belts.
BACKGROUND OF THE INVENTION
There is known a cogged belt comprising an elastic base which incorporates a carrying element and an element reinforcing the belt cogs. The carrying element has the form of a strip fabricated from metal or polymeric material. The strip has slots in the zone of the cogs to form lugs crimped to the inside of the cogs for reinforcement. These slots are made so that the lugs are crimped laterally of the carrying strip. An insert is further provided between the lugs to impart a higher rigidity to the cogs (cf., USSR Inventor's Certificate No. 1,033,794, published Aug. 7, 1983 in Bulletin "Discoveries, Inventions, Industrial Designs, Trademarks" No. 29).
However, the aforedescribed cogged belt suffers from insufficient carrying capacity, since the carrying element has ports at cog locations, which weaken the cogs cross-sectionally.
SUMMARY OF THE INVENTION
The present invention is therefore aimed at providing a cogged belt in which the cogs would be so reinforced as to substantially increase the carrying capacity and extend the service life of the cogged belt.
The aims of the invention are attained by that in a cogged belt comprising an elastic base which incorporates a carrying element in the form of a strip with crimped lugs and inserts to reinforce the cogs of the belt; and which are connected to the strip by these lugs, according to the invention, the lugs are arranged at the outer opposite sides of the strip transversely of the cogs and interconnected by a pin, whereas the insert is mounted on this pin.
In order to connect ends of the carrying strip, the lugs at the ends of the strip are arranged so that the distance between the opposite lugs disposed at one end of the strip is greater than the distance between the opposite lugs disposed at the other end of the strip by twice the thickness of the strip.
Such a connection between the strip ends is structurally most simple and reliable for ensuring high carrying capacity of the cogged belt.
Alternatively, the strip is provided along its width in parallel with the strips with additional lugs having holes therein to receive the pin connecting the lugs, whereas the insert is capable of lateral detachment.
The provision of additional lugs is especially important when transmitting high torques at relatively low bending loads, especially in the area of connection between the ends of the carrying strip.
The cogged belt embodying the present invention, while being simple in construction, offers a high carrying capacity.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in greater detail with reference to a specific embodiment thereof taken in conjunction with the accompanying drawings, in which:
FIG. 1 is an axonometric partially cut-away view of a cogged belt according to the invention;
FIG. 2 is a side view of the cogged belt according to the invention;
FIG. 3 is a section taken along the line III--III in FIG. 2;
FIG. 4 is a section taken along the line IV--IV in FIG. 3;
FIG. 5 is a section taken along the line V--V in FIG. 3;
FIG. 6 is a top plan view of an end of the carrying element; and
FIG. 7 is a section taken along the line VII--VII in FIG. 6.
BEST MODE OF CARRYING OUT THE INVENTION
A toothed belt comprises an elastic base 1 (FIG. 1) incorporating a carrying element in the form of a strip 2 fabricated from metal or polymeric material, and cogs 3. For reinforcing each cog 3 (FIGS. 1 and 2) the belt 2 is provided at the opposite outer sides thereof with lugs 4 (FIGS. 1 and 3). The lugs 4 are interconnected by a pin element 5 having an insert 6 mounted thereon.
Ends "a" (FIGS. 4 and 5) and "b" of the strip 2 are connected in a lap joint, and in the zone of the cog 3, the lugs 4 (FIG. 5) at the end "a" and lugs 9 at the end "b" are so arranged that the distance between the lugs 9 (FIG. 3) at the end "b" (FIG. 4) of the carrying strip 2 is greater than the distance between the lugs 4
REFERENCES:
patent: 2189049 (1940-02-01), Ungar
patent: 2300706 (1942-11-01), Schott
patent: 4198875 (1980-04-01), Schneider
Boikov Vladimir P.
Guskov Valery V.
Kasperovich Petr P.
Kozachevsky Gennady G.
Molodan Oleg I.
Belorussky Politekhnichesky Institut
Bui Thuy M.
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