INPUT SHAFT SEALS FOR A TRANSMISSION DESIGN SERIES

Abstract

A transmission type series with at least two transmissions that each have an input shaft (103, 203), a housing (105, 205), and a cover (107, 207). The housings (105, 205) each form a flange (109, 209) in which the respective cover (107, 207) is secured oil-tight. The input shafts (103, 203) penetrate through the respective cover (107, 207) and the covers (107, 207) each have at least one seal (111, 211a, 211b, 211c) to form a seal against the respective input shaft (103, 105). The flanges (109, 209) have an identical design and the seals (111, 211a, 211h, 211c) differ.

Claims

1-8. (canceled)

9. A transmission type series comprising: at least two transmissions that each have an input shaft (103, 203), a housing (105, 205), and a cover (107, 207), wherein: each housing (105, 205) forms a flange (109, 209) in which the respective cover (107, 207) is secured oil-tight; each input shaft (103, 203) penetrates the respective cover (107, 207); each cover (107, 207) has at least one seal (111, 211a, 211b, 211c) as a seal against the respective input shaft (103, 105); each flange (109, 209) has an identical design; and the at least one seal (111, 211a, 211b, 211c) differs between the at least two transmissions.

10. The transmission type series according to claim 9; wherein the respective cover (107, 207) differs between each of the at least two transmissions.

11. The transmission type series according to claim 9, wherein: each input shaft (107, 207) has a ring (113, 213); the ring (113, 213) differs between the input shaft of the at least two transmissions; and the at least one seal (111, 211a, 211b, 211c) is formed to at least partially form a seal against the respective ring (113, 213).

12. The transmission type series according to claim 10, wherein: each input shaft (107, 207) has a ring (113, 213); the ring (113, 213) differs between the input shaft of the at least two transmissions; and the at least one seal (111, 211a, 211b, 211c) is formed to at least partially form a seal against the respective ring (113, 213).

13. The transmission type series according to claim 12, wherein each input shaft (103, 203) has an identical design in at least one respective part, and wherein the respective ring (113, 213) is arranged on the at least one respective part.

14. The transmission type series according to claim 9, wherein the at least one seal (211a, 211b, 211c) of at least one of the at least two transmissions is formed as a seal arrangement comprising a radial shaft seal ring (211a), a V-ring seal (211b), and a labyrinth seal (211c).

15. The transmission type series according to claim 14, wherein the V-ring seal (211b) together with the labyrinth seal (211c) forms a cavity (215) that is at least partially filled with grease.

16. The transmission type series according to claim 15, wherein at least one seal (111) of at least one further of the at least two transmissions is formed as a radial shaft seal ring.

17. The transmission type series according to claim 9, wherein the housing (105, 205) of each of the at least two transmissions has an identical design.

18. The transmission type series according to claim 13, wherein the housing (105, 205) of each of the at least two transmissions has an identical design.

19. The transmission type series according to claim 15, wherein the housing (105, 205) of each of the at least two transmissions has an identical design.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] A preferred exemplary embodiment of the invention is shown in the figures. In detail, these show in:

[0024] FIG. 1 a section of a first transmission of a type series; and in

[0025] FIG. 2 a section of a second transmission of the type series.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS

[0026] The transmissions according to the FIGS. 1 and 2 each have one input shaft 103, 203. The input shafts 103, 203 penetrate an opening of the respective housing 105, 205. Respectively one cover 109, 209 is provided to close these openings.

[0027] The housing 105 of the first transmission and the housing 205 of the first transmission each form a threaded flange 109, 209. The threaded flanges 109, 209 have an identical design. The cover 107 of the first transmission is threaded to the threaded flange 109 of the first transmission. Likewise, the cover 207 of the second transmission is threaded to the threaded flange 209 of the second transmission.

[0028] The covers 107, 207 in turn form an opening through which the respective input shaft 103, 203 penetrates. The seals 111, 211a, 211b, 211c are provided to seal this opening against the respective input shaft 103, 203.

[0029] The cover 111 of the first transmission has a single radial shaft seal ring 111. The radial shaft seal ring 111 is secured in the cover 107 of the first transmission.

[0030] A seal lip of the radial shaft seal ring 111 extends on the surface of a ring 113 that is shrunk onto the input shaft 103 of the first transmission. A corresponding ring 213 is shrunk onto the input shaft 203 of the second transmission. The ring 113 of the first transmission and the ring 213 of the second transmission differ with respect to their component geometry. This enables the use of a different seal arrangement in the second transmission.

[0031] The seal arrangement of the second transmission comprises a radial shaft seal ring 211a, a V-ring seal 211b, and a labyrinth seal 211c, The cover 207 is formed as two pieces to accommodate this seal arrangement. A first piece 207a of the cover 207 accommodates the radial shaft seal ring 211a. The first piece 207a is threaded to the threaded flange 209 of the second transmission. Accordingly, the first piece 207a is fitted to the housing.

[0032] A second piece 207b of the cover 207 of the first transmission is secured rotationally fixed on the input shaft 203 of the first transmission. When the input shaft 203 rotates, the second piece 207b of the cover 207 of the first transmission appropriately rotates relative to the first piece 207a.

[0033] The V-ring seal 211b is secured in the second piece 207b of the cover 207 of the first transmission. Its seal lip extends along the first piece 207a of the cover 207 of the first transmission.

[0034] Additionally, the pieces 207a, 207b of the seal ring 207 of the second transmission each form a part of the labyrinth seal 211c. A cavity 215 is located between the V-ring seal 211b and the labyrinth seal 211c. The cavity is filled with grease.

LIST OF REFERENCE NUMERALS

[0035] 103 Input shaft [0036] 105 Housing [0037] 107 Cover [0038] 109 Threaded flange [0039] 111 Radial shaft seal ring [0040] 113 Ring [0041] 203 Input shaft [0042] 205 Housing [0043] 207 Cover [0044] 209 Threaded flange [0045] 211a Radial shaft seal ring [0046] 211b V-Ring seal [0047] 211c Labyrinth seal [0048] 213 Ring [0049] 213a first piece of the ring [0050] 213b second piece of the ring [0051] 215 Cavity