Transmission for the feeding movement of mechanical carriage units of machine tools

Claim 2

In a transmission, especially for a machIne tool carriage and operable for transmitting power, a first drive shaft and a second drive shaft, an output shaft; a ring-like first rotor having internal teeth, a noncircular second rotor coaxial with and inside said first rotor, a flexible ring connected to said output shaft and having an axial flange disposed between said first and second rotors and having external teeth meshing with the internal teeth of said first rotor, the number of teeth on said flange being different from the number of teeth on said first rotor, said second rotor pressing at least one circumferential portion of said flange radially outwardly to bring the teeth of said portion into meshing engagement with the teeth of said first rotor, first means connecting said first drive shaft to said first rotor, and second means connecting the said second drive shaft to said second rotor.

Claim 3

A transmission according to claim 1 in which said second rotor comprises means defining diametrically opposite holes pressing diametrically opposite portions of said second rotor radially outwardly to dispose the external teeth on said portions in mesh with teeth on said first rotor.

Claim 4

A transmission according to claim 1 which includes friction brake means coaxial with said first drive shaft and operatively connected to said first rotor.

Claim 5

A transmission according to claim 3 which includes a first gear coaxial with and connected to said first rotor and said first means comprises a second gear meshing with said first gear and coaxial with said first drive shaft.

Claim 6

A transmission according to claim 4 which includes friction clutch means connecting said gear with said first drive shaft.

Claim 7

A transmission according to claim 5 in which said friction clutch means comprises a pair of rings on said first drive shaft frictionally engaging respective sides of said gear, said friction brake means being connected between one of said rings and a stationary point.

Claim 8

A transmission according to claim 3 in which said friction brake means is spring loaded.

Claim 9

A transmission according to claim 4 in which said first rotor is disposed at least partly inside said first gear.

Claim 10

A transmission according to claim 8 which includes an axial sleeve coaxial with said second shaft and connected to at least one of said first rotor and first gear, said transmission having a housing, and bearing means supporting said sleeve in said housing.

Claim 11

A transmission according to claim 1 in which said output shaft is coaxial with said second shaft, a sleeve member fixed to said output shaft and extending toward said second shaft, and bearing means supporting said second rotor on said sleeve member.

Claim 12

A transmission according to claim 10 in which said flexible ring comprises an axial extension having an end portion connected to said output shaft.

Claim 13

A transmission according to claim 11 which includes antifriction bearing elements disposed between said second rotor and the said axial flange of said flexible ring.

Claim 14

A transmission according to claim 1 in which said first drive shaft is a fast transverse drive shaft and said second drive shaft is a feed drive shaft.

Claim 15

A transmission according to claim 13 in which said feed drive shaft is infinitely adjustable in speed.

Claim 16

A transmission according to claim 14 in which said fast transverse drive shaft is the output shaft of a constant speed electric motor and said feed drive shaft is the output shaft of a direct current electric motor.

Claim 17

A transmission according to claim 15 in which said direct current motor is coaxial with said output shaft.

Claim 18

A transmission according to claim 16 in which said transmission comprises a housing, said output shaft projecting from one side of said housing, said motors being disposed on the other side of said housing, said housing being open on the side facing said motors, and a cover plate detachably mounted on and closing the open side of said housing, said motors being mounted on said cover plate.

Claim 19

In a traNsmission: an output shaft, an element drivingly connected to said output shaft and comprising an internal gear, an axial sleeve portion, external teeth respectively on said sleeve portion in radially spaced relation to mesh with said internal gear, a cam rotor in said sleeve portion rotatable on the axis of said output shaft, bearing means pressing a portion only of said teeth on said sleeve portion radially outwardly and into meshing engagement with the teeth on said internal gear, a first drive shaft actuated at constant speed, means including a friction clutch connecting said internal gear to said first drive shaft, a brake disposed between said first drive shaft and a stationary point and operable when actuated to hold said first drive shaft against rotation and thereby holding said internal gear against rotation until the slip torque of said friction clutch is exceeded, and a second drive shaft actuated at variable speed and coaxial with said output shaft and connected to said cam rotor, each said drive shaft respectively and said brake being selectively actuatable to provide for a complete range of speeds of said output shaft.

Claim 20

In a traNsmission: an output shaft, an element drivingly connected to said output shaft and comprising an internal gear, an axial sleeve portion, external teeth respectively on said sleeve portion in radially spaced relation to mesh with said internal gear, a cam rotor in said sleeve portion rotatable on the axis of said output shaft, bearing means pressing a portion only of said teeth on said sleeve portion radially outwardly and into meshing engagement with the teeth on said internal gear, a first drive shaft actuated at constant speed, means including a friction clutch connecting said internal gear to said first drive shaft, a brake disposed between said first drive shaft and a stationary point and operable when actuated to hold said first drive shaft against rotation and thereby holding said internal gear against rotation until the slip torque of said friction clutch is exceeded, and a second drive shaft actuated at variable speed and coaxial with said output shaft and connected to said cam rotor, each said drive shaft respectively and said brake being selectively actuatable to provide for a complete range of speeds of said output shaft.