Input shaft seals for transmission series

Abstract

The present invention relates to a transmission device series with at least two transmission devices, wherein the at least two transmission devices respectively have an input shaft (103, 203), a housing (105, 205) and a cover (107, 207); wherein the housing (105, 205) respectively forms a flange (109, 209), and the respective cover (107, 207) is oil-tightly fixed in the flange; wherein the input shaft (103, 203) extends through the respective cover (107, 207); and wherein the cover (107, 207) respectively has at least one seal (111, 211a, 211b, 211c) for sealing relative to the respective input shaft (103, 105). The flanges (109, 209) are of identical construction, and the seals (111, 211a, 211b, 211c) are different.

Description

Technical Field

[0001] The invention relates to a transmission arrangement according to the preamble of claim 1 . Background Art

[0002] If the customer places different demands on sealing and durability relative to the ambient conditions prevailing at the installation site, a different sealing solution must be provided for the input shaft. This requires a redesign of the transmission input. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to simplify the design of a seal for a transmission input. This problem is solved by a transmission system according to claim 1. Preferred further developments are contained in the dependent claims and are apparent from the following description and the exemplary embodiments shown in the drawings.

[0004] A transmission series is an arrangement of at least two transmissions, which correspond in form to at least one technical feature.

[0005] The transmission device series according to the present invention comprises a first transmission device and a second transmission device. The first transmission device and the second transmission device each have an input shaft, a housing and a cover.

[0006] The housing of the first transmission and the housing of the second transmission respectively form a flange. It is a housing opening with a device for fixing a respective cover so that the cover at least partially, preferably completely closes the opening.

[0007] The cover of the first transmission is fixed to the flange of the first transmission. The cover of the second transmission is similarly fixed to the flange of the second transmission. The fixing is oil-tight, that is, no oil can escape between the flange and the respective cover. For this purpose, a seal, such as a solid seal, is preferably installed between the flange and the respective cover.

[0008] The input shaft of the first transmission extends through the cover of the first transmission. The input shaft of the second transmission also extends through the cover of the first transmission. The input shaft of the second transmission also extends through the cover of the second transmission. This means that the covers each have an opening through which the respective input shaft extends. The two parts of each input shaft are therefore located on different sides of the respective cover. One part of the respective input shaft is located inside the transmission, while the other part is located outside.

[0009] The cover of the first transmission has at least one seal for sealing the cover relative to the input shaft of the first transmission. The cover of the second transmission also has at least one seal for sealing the cover relative to the input shaft of the second transmission. The seals are preferably each oil-tight, i.e., no oil can escape from the respective transmission between the cover and the respective input shaft.

[0010] According to the invention, the flange of the first transmission and the flange of the second transmission are structurally identical. Two technical components or arrangements of components are structurally identical if their physical parameters, in particular their materials and geometrical properties, are identical within the scope of the manufacturing tolerances that occur.

[0011] In contrast to the flanges, the seals are different. Thus, at least one seal of the first transmission is different from at least one seal of the second transmission. This means that all seals of the cover of the first transmission, which seals the first transmission relative to its input shaft, are collectively different from all seals of the cover of the second transmission, which seals the second transmission relative to its input shaft.

[0012] Two technical components or arrangements of components are different or differ from one another if they are not structurally identical. This means that there is a difference between the components or arrangements with respect to at least one physical parameter, which difference is not caused by manufacturing and therefore lies outside the scope of the manufacturing tolerances that occur.

[0013] The identically designed flanges create economies of scale and, consequently, cost savings. Different seals allow the respective transmission to be adapted to the respective requirements, as described above.

[0014] In a preferred embodiment, the input shaft of the first transmission and the input shaft of the second transmission each have a ring. The rings of the input shaft of the first transmission and the rings of the input shaft of the second transmission are different. The rings are preferably fixed to the respective input shafts in a force-locking and / or form-locking manner. The fixing is performed such that no oil can escape from the respective transmission between the rings and the rest of the respective shaft.

[0015] At least one portion of the at least one seal of the first transmission seals the cover of the first transmission against the ring of the input shaft of the first transmission. At least one portion of the at least one seal of the second transmission also seals the cover of the second transmission against the ring of the input shaft of the second transmission.

[0016] The sealing of the relative ring according to the extended design is advantageous because the input shaft can simply be matched to the different seals of the respective transmissions by the ring. In a preferred extended design, in particular, the input shaft having the same structure as at least part can be used.

[0017] According to an expanded design, at least one section of the input shaft of the first transmission and at least one section of the input shaft of the second transmission are structurally identical. The respective rings are mounted on structurally identical sections of the input shafts. The ring of the input shaft of the first transmission is thus also mounted on at least one section of the input shaft of the first transmission. The ring of the input shaft of the second transmission is similarly mounted on at least one section of the input shaft of the second transmission. Aside from the respective rings, the input shafts are preferably completely structurally identical. The input shafts consist of a base body and the respective rings, wherein the base bodies are structurally identical.

[0018] At least one seal of the second transmission is preferably designed as a taconite seal. A taconite seal is a sealing arrangement that includes a radial shaft seal, a V-ring seal, and a labyrinth seal. These three individual seals are arranged in series, that is, along the gap to be sealed. Oil that escapes through the gap must pass through all three seals in sequence.

[0019] In a preferred embodiment, the V-ring seal and the labyrinth seal form a cavity. The cavity is particularly delimited by the V-ring seal and the labyrinth seal. The cavity is at least partially filled with grease, thereby improving the sealing effect.

[0020] The at least one seal of the first transmission is preferably extended to form a radial shaft sealing ring. The radial shaft sealing ring forms at least one seal according to the extended design. This means that the cover of the first transmission is sealed relative to the shaft or the shaft ring only via the radial shaft sealing ring.

[0021] In a further preferred embodiment, not only the flange but also the entire housing of the first gear mechanism and the second gear mechanism are of identical construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred embodiment of the present invention is shown in the accompanying drawings. In the drawings:

[0023] Figure 1 A cross-sectional fragment of a first transmission of the series is shown in detail; and

[0024] Figure 2 A cross-sectional detail of the second transmission of the series is shown in detail. DETAILED DESCRIPTION

[0025] according to Figure 1 and Figure 2 The transmissions of the invention each have an input shaft 103, 203. The input shaft 103, 203 extends through an opening of a respective housing 105, 205. In order to close this opening, a cover 109, 209 is provided.

[0026] The housing 105 of the first transmission and the housing 205 of the second transmission respectively form screw flanges 109 and 209. The screw flanges 109 and 209 are identical in structure. The cover 107 of the first transmission is screwed to the screw flange 109 of the first transmission. The cover 207 of the second transmission is similarly screwed to the screw flange 209 of the second transmission.

[0027] The cover 107, 207 itself is configured as an opening through which the respective input shaft 103, 203 extends. In order to seal this opening relative to the respective input shaft 103, 203, a seal 111, 211a, 211b, 211c is provided.

[0028] The cover 111 of the first transmission has a simple radial shaft sealing ring 111. The radial shaft sealing ring 111 is fixed in the cover 107 of the first transmission.

[0029] The sealing lip of radial shaft sealing ring 111 extends over the surface of ring 113, which is contracted onto input shaft 103 of the first transmission. A corresponding ring 213 is contracted onto input shaft 203 of the second transmission. Ring 113 of the first transmission and ring 213 of the second transmission differ from each other in their component geometries. This enables the use of different sealing mechanisms in the second transmission.

[0030] The sealing mechanism of the second transmission includes a radial shaft sealing ring 211a, a V-ring seal 211b, and a labyrinth seal 211c. Cover 207 is constructed in two parts to accommodate this sealing mechanism. First part 207a of cover 207 accommodates radial shaft sealing ring 211a. First part 207a is screwed to screw flange 209 of the second transmission. First part 207a is fixedly mounted to the housing.

[0031] The second part 207b of the first transmission cover 207 is fixed in a rotationally fixed manner on the first transmission input shaft 203. If the input shaft 203 rotates, the second part 207b of the first transmission cover 207 rotates accordingly relative to the first part 207a.

[0032] The V-ring seal 211b is fixed in the second part 207b of the cover 207 of the first transmission device. Its sealing lip extends on the first part 207a of the cover 207 of the first transmission device.

[0033] In addition, the parts 207a, 207b of the sealing ring 207 of the second transmission respectively form a part of the labyrinth seal 211c. There is a cavity 215 between the V-ring seal 211b and the labyrinth seal 211c. The cavity is filled with grease.

[0034] Reference Signs List

[0035] 103 Input shaft

[0036] 105 housing

[0037] 107 Cover

[0038] 109 spiral flange

[0039] 111 Radial shaft sealing ring

[0040] 113 Ring

[0041] 203 Input shaft

[0042] 205 housing

[0043] 207 Cover

[0044] 209 spiral flange

[0045] 211a Radial shaft sealing ring

[0046] 211b V-ring seal

[0047] 211c labyrinth seal

[0048] 213 Ring

[0049] 213a First part of the ring

[0050] 213b Second part of the ring

[0051] 215 cavity

Claims

1. A transmission device series having at least two transmission devices, each of which has an input shaft (103, 203), a housing (105, 205) and a cover (107, 207); wherein: The housings (105, 205) respectively form flanges (109, 209), in which respective covers (107, 207) are fixed oil-tightly; wherein, The input shafts (103, 203) extend through respective covers (107, 207); and wherein, The covers (107, 207) each have at least one seal (111, 211a, 211b, 211c) for sealing relative to the respective input shaft; characterized in that: The flanges (109, 209) are structurally identical and the seals (111, 211a, 211b, 211c) are structurally different, At least one seal (211a, 211b, 211c) of at least one of the transmission devices is configured as a sealing mechanism, the sealing mechanism comprising a radial shaft sealing ring (211a), a V-ring seal (211b) and a labyrinth seal (211c), And wherein at least one seal (111) of at least one other of the transmissions is designed as a radial shaft sealing ring.

2. The transmission device structure series according to claim 1; characterized in that The covers (107, 207) are different.

3. The transmission device structure series according to claim 1 or 2; characterized in that: The input shafts each have a ring (113, 213); wherein the rings (113, 213) are different; and wherein, The at least one seal (111, 211a, 211b, 211c) is each at least partially configured to seal relative to the respective ring (113, 213).

4. The transmission device structure series according to claim 3, characterized in that The input shafts (103, 203) are structurally identical in at least one portion; wherein, The respective ring (113, 213) is mounted on the at least one portion.

5. The transmission device structure series according to claim 1, characterized in that: The V-ring seal (211b) and the labyrinth seal (211c) form a cavity (215) that is at least partially filled with grease.

6. The transmission device structure series according to claim 1 or 2, characterized in that: The housings (105, 205) are identical in structure.

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