Transmission shaft, transmission, and motor vehicle drivetrain

A shaft (W) for a motor vehicle transmission (G), comprising:

• only four axial bore holes (B1a, B2a, B3a, B4a) positioned within the shaft (W) and configured to guide fluid within the shaft (W);
• and
• a first axial section (W1), a second axial section (W2), and a third axial section (W3), the second axial section (W2) being axially between the first axial section (W1) and the third axial section (W3),
• wherein fluid is supplied to the four axial bore holes (B1a, B2a, B3a, B4a) in the second axial section (W2),
• wherein the fluid exits from the four axial bore holes (B1a, B2a, B3a, B4a) at the first axial section (W1) and at the third axial section (W3),
• wherein two bore holes of the four axial bore holes (B1a, B2a) are at least partially in the first axial section (W1) and another two bore holes of the four axial bore holes (B3a, B4a) are at least partially in the third axial section (W3), at least one bore hole (B1a) of the two bore holes (B1a, B2a) at least partially in the first axial section (W1) being radially spaced from an axis of rotation (WA) of the shaft (W), and
• wherein each of the two bore holes (B1a, B2a) at least partially in the first axial section (W1) is coaxial with a respective one of the other two bore holes (B3a, B4a) at least partially in the third axial section (W3).

A shaft (W) for a motor vehicle transmission (G), comprising:

• only six axial bore holes (B1a, B2a, B3a, B4a, B5a, B6a) positioned within the shaft (W) and configured to guide fluid within the shaft (W);
• and
• a first axial section (W1), a second axial section (W2), and a third axial section (W3), the second axial section (W2) being axially between the first axial section (W1) and the third axial section (W3),
• wherein fluid is supplied to the six axial bore holes (B1a, B2a, B3a, B4a, B5a, B6a) in the second axial section (W2),
• wherein the fluid exits from the six axial bore holes (B1a, B2a, B3a, B4a, B5a, B6a) at the first axial section (W1) and at the third axial section (W3),
• wherein three bore holes (B1a, B2a, B5a) of the six axial bore holes (B1a, B2a, B3a, B4a, B5a, B6a) are at least partially in the first axial section (W1) and another three bore holes (B3a, B4a, B6a) of the six axial bore holes (B1a, B2a, B3a, B4a, B5a, B6a) are at least partially in the third axial section (W3), with at least one bore hole (B1a) of the three bore holes (B1a, B2a, B5a) at least partially in the first axial section (W1) being radially spaced from an axis of rotation (WA) of the shaft (W),
• wherein each of the three bore holes (B1a, B2a, B5a) at least partially in the first axial section (W1) is coaxial with a respective one of the other three bore holes (B3a, B4a, B6a) at least partially in the third axial section (W3).

A transmission (G) for a motor vehicle, comprising:

• a shaft (W), the shaft (W) having:
• a plurality of axial bore holes (B1, B2, B3, B4, B1RS, B_SE2, B_SE5, B1a, B2a, B3a, B4a, B5a, B6a) positioned within the shaft (W) and configured to guide fluid within the shaft (W);
• and
• a first axial section (W1), a second axial section (W2), and a third axial section (W3), the second axial section (W2) being axially between the first axial section (W1) and the third axial section (W3),
• wherein fluid is supplied to the plurality of axial bore holes (B1, B2, B3, B4, B1RS, B_SE2, B_SE5, B1a, B2a, B3a, B4a, B5a, B6a) in the second axial section (W2),
• wherein the fluid exits from the plurality of axial bore holes (B1, B2, B3, B4, B1RS, B_SE2, B_SE5, B1a, B2a, B3a, B4a, B5a, B6a) at the first axial section (W1) and at the third axial section (W3),
• wherein one of the plurality of axial bore holes (B2;
• B1, B1a) is arranged, at least partially, in the first axial section (W1) and is radially spaced from an axis of rotation (WA) of the shaft (W),
• wherein another of the plurality of axial bore holes (B1RS;
• B_SE5, B3a) is arranged, at least partially, in the third axial section (W3), and
• wherein the one of the plurality of axial bore holes (B2;
• B1, B1a) is coaxial with the other of the plurality of axial bore holes (B1RS;
• B_SE5, B3a);
• a hydrodynamic torque converter (TC) including a hydraulically actuatable torque converter lockup clutch (WK);
• and
• a plurality of hydraulically actuatable shift elements (SE1, SE2, SE3, SE4, SE5), wherein a gear implementation of the transmission (G) is controllable via selective actuation of the plurality of shift elements (SE1, SE2, SE3, SE4, SE5),
• wherein a first bore hole of the plurality of axial bore holes (B2, B3) of the shaft (W) supplies fluid to the hydrodynamic torque converter (TC) or for actuating the torque converter lockup clutch (WK), the first bore hole of the plurality of axial bore holes (B2, B3) extending in the first axial section (W1) of the shaft (W), and
• wherein a second bore hole of the plurality of axial bore holes (B_SE2, B_SE5) of the shaft (W) supplies fluid for actuating at least one of the plurality of shift elements (SE2, SE5), the second bore hole of the plurality of axial bore holes (B_SE2, B_SE5) extending in the third axial section (W1) of the shaft (W).