| 摘要 |
951,951. Toothed gearing. ZAVODY V.I. LENINA PLZEN, NARODNI PODNIK. Dec. 16, 1960 [Dec. 16, 1959], No. 43375/60. Heading F2Q. A gearcase comprises a housing having coaxial apertures receiving rotatably positioned covers formed with holes arranged in mirror-image pattern to accept shafts supporting spur, bevel &c. gearing. In one form, a housing 1, Figs. 1-3, has base surfaces 2 and coaxial apertures 3, 4 adapted to receive rotatably positioned covers 17, 31, Figs. 7, 9, constructed with holes 19-23 arranged in mirror-image fashion. The centres of the holes 19-21 lie on straight lines intersecting straight lines passing through the holes 22, 23, and successive pairs of holes are spaced with their centres at increasing distances apart. The increase in distance between successive pairs of holes is in geometric progression. The sides 7, 8 of the housing are provided with cover plates (not shown) for mounting bevel pinions. The spatial arrangement, of the holes 19-23 is such that, in combination with standardized sets of spur, bevel &c. gearing, trains of gears giving different ratios may be arranged within the housing. The ratios thus obtainable are in geometric progression. A number of different-sized housings 1 can be manufactured, related dimensionally in such a way as to permit interchangeability between certain gear-wheels from the standardized sets. In a modification, Figs. 4-6 (not shown), the base surfaces of the housing are so arranged that the gear shafts can be vertical. The widths of the teeth of the various standardized sets of gear-wheels may differ, the arrangement of the gear trains within the housing being such that those gear-wheels transmitting the greatest torque have the widest teeth.
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