STEPPED PLANETARY GEAR

Abstract

A planetary gear (101) with a first set of teeth (107) and a second set of teeth (109). The planetary gear comprises two components, namely, a first component (103) and a second component (105). The first component (103) includes the first teeth (107) and the second component (105) includes the second teeth (109). The planetary gear has a first spline connection and a second spline connection (111). The first component (103) includes the first spline connection while the second component (105) includes the second spline connection (111). The second spline connection (111) can be pushed over the first spline connection in such manner that the first spline connection and the second spline connection (111) engage with one another in an interlocking manner.

Claims

1-4. (canceled)

5. A planetary gear (101) comprising: a first set of teeth (107); a second set of teeth (109); the planetary gear being made from a first component (103) and a second component (105); the first component (103) comprising the first set of teeth (107) and the second component (105) comprising the second set of teeth (109); a first spline connection and a second spline connection (111); the second component (105) comprising the second spline connection (111); and the second spline connection (111) can be pushed over the first spline connection in such manner that the first spline connection and the second spline connection (111) engage with one another in an interlocking manner.

6. The planetary gear (101) according to claim 5, wherein a section of the first set of teeth (107) forms the first spline connection.

7. The planetary gear according to claim 5, wherein the first component (103) is mounted for rotation on a planetary pin (117).

8. The planetary gear (101) according to claim 7, wherein the first component (103) is mounted for rotation on the planetary pin (117) by at least one bearing (115); and the at least one bearing (115) is arranged at least partially located radially inside the planetary gear (101).

9. A stepped planetary gear defining an axis and being supported on a planetary carrier, the stepped planetary gear comprising: a first component having a first set of teeth which form a first connection spline; a second component having a second set of teeth which forms a second connection spline; the second connection splines of the second component interlockingly engage with the first connection splines of the first component such that the first component and the second component are fixed in position relative to one another.

10. The planetary gear according to claim 9, wherein the first connection spline extends along an axial length of the first set of teeth that is only a portion of a total axial length of the first set of teeth.

11. The planetary gear according to claim 9, wherein the first component is rotatably supported on a planetary pin by at least one bearing such that the planetary gear is rotatable with respect to the planetary pin and the planetary carrier.

12. The planetary gear according to claim 11, wherein the at least one bearing is radially arranged at least partially inside the first component.

13. The planetary gear according to claim 9, wherein the second set of teeth are formed on a radially outer side of the second component and the second connection spline is formed on a radially inner side of the second component.

14. The planetary gear according to claim 13, wherein a pitch diameter of the second set of teeth is greater than a pitch diameter of the first set of teeth.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Preferred example embodiments are illustrated in the figures, in which the same indexes denote the same or functionally equivalent features. In detail, the figures show:

[0024] FIG. 1: A hollow stepped planetary gear; and

[0025] FIG. 2: A solid stepped planetary gear.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] A stepped planetary gear 101 according to FIG. 1 comprises a first component 103 and a second component 105. The first component 103 comprises a first set of teeth 107. The second component 105 comprises a second set of teeth 109. Furthermore, the second component 105 is provided with a spline connection 111 in the form of internal teeth.

[0027] The first set of teeth 107 extend in the axial direction over the full width of the first component 103. Correspondingly, the first teeth 107 serve not only to mesh with a further gearwheel, for example a sun gear, but also extend over a section which functions as a spline connection.

[0028] Together with the spline connection 111 of the second component 105 these spline connections form an interlocking connection when the second component 105 is pushed onto the first component 103. Consequently, the first component 103 and the second component 105 are rotationally fixed relative to one another and translationally fixed in the radial direction. The first component 103 is fixed axially relative to the second component 105 by means of locking rings 113.

[0029] Two bearings 115, which are inside the first component 103, serve to mount the stepped gear 101 so that it can rotate on a planetary pin 117.

[0030] Between the planetary pin 117 and the planetary carrier 119 there is a frictional and interlocking fixed connection, which fixes the planetary pin 117 and the planetary carrier 119 so that they cannot move relative to one another.

[0031] In contrast to the stepped gear 101 shown in FIG. 1, which is a hollow structure, FIG. 2 shows a stepped gear 101 with a solid first component 103. In this case the bearings 115 are arranged displaced to the outside, with their outer races fixed in the planetary carrier 119. The first component 103 of the stepped gear 101 is fixed in the inner races of the bearings 115.

INDEXES

[0032] 101 Stepped gear [0033] 103 First component [0034] 105 Second component [0035] 107 First set of teeth [0036] 109 Second set of teeth [0037] 111 Spline connection [0038] 113 Locking ring [0039] 115 Bearing [0040] 117 Planetary pin [0041] 119 Planetary carrier