SEVEN-GEAR GEARBOX FOR A MOTORCAR DOUBLE CLUTCH TRANSMISSION
First Claim
1. Seven-gear gearbox for a motorcar double clutch transmission, comprising:
- a gear case;
a first inner input shaft (10) and a second outer input shaft (12) arranged coaxial to the first, said first and second input shafts (10, 12) being supported on the gear case (52);
first and second output shafts (14, 16);
a first group of driving gearwheels (21, 23, 27) carried by the first input shaft (10) so as to-be drivingly connected for rotation therewith, said first group of driving gearwheels being associated to a first gear (I), to a third gear (III), to a fifth gear (V) and to a seventh gear (VII);
a second group of driving gearwheels (22, 24) carried by the second input shaft (12) so as to be drivingly connected for rotation therewith, said second group of driving gearwheels being associated to a second gear (II), to a fourth gear (IV), to a sixth gear (VI) and to a reverse gear (R);
a first group of driven gearwheels (32, 35, 36, 37) idly mounted on the first output shaft (14);
a second group of driven gearwheels (31, 33, 34, 38) idly mounted on the second output shaft (16); and
a first end support (54), a second end support (56) and a third intermediate support (58, 60) arranged to support the first and second input shafts (10, 12) on the gear case (52), wherein the first end support comprises a bearing (54) fitted between the gear case (52) and an end portion of the first input shaft (10) opposite a first side of the gearbox, wherein the second end support comprises a bearing (56) fitted between the gear case (52) and a portion of the second input shaft (12) facing the first side of the gearbox, and wherein the third intermediate support comprises a first bearing (58) radially interposed between the first and second input shafts (10, 12) and a second bearing (60) fitted between the second input shaft (12) and the gear case (52) so as to be axially aligned or superimposed with the first bearing (58).
2 Assignments
0 Petitions
Accused Products
Abstract
Seven-gear gearbox for a motorcar double clutch transmission The gearbox comprises: a first inner input shaft (10) which carries driving gearwheels (21, 23, 27) associated to the odd gears (I, III, V, VII) and fast for rotation therewith; a second outer input shaft (12) which is coaxial with the first and carries driving gearwheels (22, 24) associated to the even gears (II, IV, VI) and to the reverse gear (R) and fast for rotation therewith; and first and second output shafts (14, 16) carrying idle driven gearwheels (31-38). A first driving gearwheel (21) meshes only with the driven gearwheel (31) of first gear (I); a second driving gearwheel (23) meshes both with the driven gearwheel (33) of third gear (III) and with the driven gearwheel (35) of fifth gear (V); a third driving gearwheel (27) meshes only with the driven gearwheel (37) of seventh gear (VII); a fourth driving gearwheel (24) meshes both with the driven gearwheel (34) of fourth gear (IV) and with the driven gearwheel (36) of sixth gear (VI); and a fifth driving gearwheel (22) meshes with the driven gearwheel (32) of second gear (II) and, via this latter, with the driven gearwheel (38) of reverse gear (R).
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Citations
16 Claims
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1. Seven-gear gearbox for a motorcar double clutch transmission, comprising:
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a gear case;
a first inner input shaft (10) and a second outer input shaft (12) arranged coaxial to the first, said first and second input shafts (10, 12) being supported on the gear case (52);
first and second output shafts (14, 16);
a first group of driving gearwheels (21, 23, 27) carried by the first input shaft (10) so as to-be drivingly connected for rotation therewith, said first group of driving gearwheels being associated to a first gear (I), to a third gear (III), to a fifth gear (V) and to a seventh gear (VII);
a second group of driving gearwheels (22, 24) carried by the second input shaft (12) so as to be drivingly connected for rotation therewith, said second group of driving gearwheels being associated to a second gear (II), to a fourth gear (IV), to a sixth gear (VI) and to a reverse gear (R);
a first group of driven gearwheels (32, 35, 36, 37) idly mounted on the first output shaft (14);
a second group of driven gearwheels (31, 33, 34, 38) idly mounted on the second output shaft (16); and
a first end support (54), a second end support (56) and a third intermediate support (58, 60) arranged to support the first and second input shafts (10, 12) on the gear case (52), wherein the first end support comprises a bearing (54) fitted between the gear case (52) and an end portion of the first input shaft (10) opposite a first side of the gearbox, wherein the second end support comprises a bearing (56) fitted between the gear case (52) and a portion of the second input shaft (12) facing the first side of the gearbox, and wherein the third intermediate support comprises a first bearing (58) radially interposed between the first and second input shafts (10, 12) and a second bearing (60) fitted between the second input shaft (12) and the gear case (52) so as to be axially aligned or superimposed with the first bearing (58). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification