Gearing with housing

Abstract

The invention relates to a gearing with a housing, wherein the housing has a continuous bearing bore, in which a bearing is received which rotatably supports an output shaft of the gearing, wherein an annular bearing cap of the gearing has an axially protruding first collar region which protrudes into the bearing bore, wherein an annular sealing cover of the gearing has an axially protruding second collar region which protrudes into the annular opening of the bearing cap, wherein the sealing cover has, on its side which faces away from the bearing cap, a first annular groove, into which a first radial bore of the sealing cover opens, wherein a second radial bore of the bearing cap is connected via a two-part axial bore to the first radial bore of the sealing cover, wherein a first portion of the axial bore is arranged in the bearing cap and a second portion of the axial bore is arranged in the sealing cover.

Description

[0001] Gearbox with housing

[0002] Description:

[0003] The invention relates to a gearbox with a housing.

[0004] It is generally known that the output shaft of a gearbox is rotatably mounted by means of a bearing.

[0005] From DE 10 2020 001 269 A1, the closest prior art discloses a method for producing different transmissions.

[0006] The invention is therefore based on the object of developing a gearbox with high oil tightness and high efficiency.

[0007] According to the invention, the object is achieved in the transmission according to the features specified in claim 1.

[0008] Important features of the invention in the transmission are that the transmission is provided with a housing, wherein the housing has a continuous bearing bore in which a bearing is accommodated, which rotatably supports an output shaft of the transmission, wherein an annular bearing cover of the transmission has an axially projecting first collar region which projects into the bearing bore, in particular and bears against the bore wall of the bearing bore, wherein an annular sealing cover of the transmission has an axially projecting second collar region which projects into the annular opening of the bearing cover, in particular and bears against the inner wall of the annular opening, wherein the sealing cover has a first annular groove on its side facing away from the bearing cover, into which a first radial bore of the sealing cover opens, wherein a second radial bore of the bearing cover is connected to the first radial bore of the sealing cover via a two-part axial bore,wherein a first section of the axial bore is arranged in the bearing cover and a second section of the axial bore is arranged in the sealing cover, in particular wherein the first section is aligned with the second section.,

[0009] The advantage here is that the grease supply is via a split axial bore, i.e., via two different parts: the sealing cover and the bearing cover. This allows for the connection of a grease supply line with a large cross-section. The bearing cover is securely connected to the housing, so connecting the grease supply line does not cause significant stress.

[0010] For this purpose, the bearing cover can be designed not only with a greater wall thickness than the sealing cover but also with a larger outer diameter than the sealing cover, so that the grease supply line is arranged in a more accessible manner, especially when connecting.

[0011] In an advantageous embodiment, a shaft seal is accommodated on the second collar region, which seals against the output shaft or against a spacer sleeve pushed onto the output shaft, in particular wherein a sealing lip of the shaft seal contacts the output shaft and a sealing seat is formed on the second collar region, onto which the shaft seal is pushed, in particular wherein the spacer sleeve is arranged axially between the inner ring of the bearing pushed onto the output shaft and a bearing nut screwed onto the output shaft. It is advantageous in this case that the gear unit can be at least partially filled with oil, thus preventing the oil from leaking out.

[0012] In an advantageous embodiment, the first radial bore of the sealing cover is sealed from the environment with a screw plug. This is advantageous in that the first radial bore functions as a grease reservoir. In an advantageous embodiment, the first radial bore of the sealing cover has a larger inner diameter than the axial bore. This is advantageous in that the first radial bore functions as an additional grease reservoir in addition to the first annular groove and the axial groove.

[0013] In an advantageous embodiment, a grease supply line is connected to the second radial bore of the bearing cap. This is advantageous because it allows for external grease supply.

[0014] In an advantageous embodiment, the sealing cover is attached to the bearing cover with screws that are screwed into axially directed threaded holes in the bearing cover. The screws and / or the threaded holes are all arranged at the same radial distance from the axis of rotation of the output shaft. The hole pattern of the threaded holes does not exhibit rotational symmetry, in particular the threaded holes are unevenly spaced from one another in the circumferential direction. This is advantageous because the relative rotational position of the sealing cover to the bearing cover can be determined using the hole pattern.

[0015] In an advantageous embodiment, a second annular groove is formed on the sealing cover, concentrically aligned with the first annular groove, the groove depth of which, in particular, the axial depth, is smaller than the groove depth, in particular the axial depth, of the first annular groove. Advantageously, the annular grooves form a labyrinth seal.

[0016] In an advantageous embodiment, the second annular groove is arranged radially outside the first annular groove. The advantage here is that the two annular grooves form a labyrinth seal, thus creating a contactless seal, so that the efficiency of the transmission is not impaired, although the seal is improved.

[0017] In an advantageous embodiment, a centrifugal disc has a third annular groove open in the radial direction, in which a laminar ring is arranged, wherein the centrifugal disc has a first annular projection which projects into the first annular groove, wherein the centrifugal disc has a second annular projection which projects into the second annular groove,

[0018] - wherein the centrifugal disc is placed on the output shaft and is connected to the output shaft in a rotationally fixed manner or wherein the centrifugal disc is connected to the bearing nut screwed onto the output shaft in a rotationally fixed manner.

[0019] The advantage here is that a labyrinth seal is formed.

[0020] In an advantageous embodiment, the first and second projections have the same axial height, in particular so that the space in the first annular groove filled with grease and air has a larger volume than the space in the second annular groove filled with grease and air. It is advantageous that the first annular groove has a grease reservoir.

[0021] In an advantageous embodiment, the first and second annular grooves are each open in the axial direction, particularly with the third annular groove being open in the radial direction. This is advantageous in that centrifugation is possible in the third annular groove, particularly with the provision of a laminar ring arranged in the third annular groove, and the first annular groove forms a labyrinth seal with the second annular groove.

[0022] In an advantageous design, the sealing cover is made of a different material from the bearing cover. This allows each of the two covers to be optimized according to its mechanical and chemical requirements.

[0023] In particular, the sealing cover can be made of aluminum and the bearing cover of steel.

[0024] In an advantageous embodiment, the sealing cover is made of a different material than the bearing cover. The advantage here is that each of the two covers can be optimized according to its mechanical and chemical requirements. In particular, the sealing cover can be made of aluminum and the bearing cover of steel. In an advantageous embodiment, the radial clearance area covered by the first annular groove is arranged radially within the radial clearance area covered by the bearing cover or overlaps with it. The advantage here is that the second radial bore acts as a grease reservoir and the two-part axial bore is arranged radially outside the first annular groove.

[0025] In an advantageous embodiment, the two-part axial bore is arranged radially outside the first annular groove. This is advantageous because the connecting first radial bore functions not only as a connection but also as a grease reservoir.

[0026] Further advantages emerge from the dependent claims. The invention is not limited to the combination of features in the claims. Further possible combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent to those skilled in the art, particularly from the problem and / or the problem posed by comparison with the prior art.

[0027] The invention will now be explained in more detail using schematic illustrations:

[0028] Figure 1 shows a cross-section through a transmission according to the invention.

[0029] Figure 2 shows an enlarged view of a portion of Figure 1.

[0030] As shown in the figures, the gearbox has a housing 11 which has a through bearing bore for receiving a bearing of the output shaft 10.

[0031] The interior of the gearbox is at least partially filled with oil.

[0032] The bearing of the output shaft is sealed from the environment by means of a labyrinth seal.

[0033] An annular bearing cap 1 partially protrudes into the bearing bore and is thus centered. Furthermore, the annular bearing cap 1 is axially spaced from the bearing, in particular from the outer ring of the bearing, of the output shaft, i.e., parallel to the direction of the axis of rotation of the output shaft 10.

[0034] The ring axis of the annular bearing cover 1 is aligned coaxially with the axis of rotation of the output shaft 10.

[0035] An annular sealing cover 3 partially protrudes into the annular opening of the annular bearing cover and is thus centered.

[0036] On the radial inside of the sealing cover 3 there is a shaft sealing ring which seals towards the output shaft 10.

[0037] Axially spaced from the shaft seal, a slinger ring 5 projects into the annular opening of the sealing cover 3 and is fitted onto the output shaft 10 and connected thereto in a rotationally fixed manner. The sealing cover 3 has two radially spaced annular grooves on its axial end face facing the bearing cover 1, into each of which a respective annular projection of the slinger ring 5 extends at least partially.

[0038] The groove depth, in particular axial depth, of a first of the two annular grooves is deeper than the groove depth, in particular axial depth, of the other of the two annular grooves.

[0039] A first radial bore is provided in the sealing cover 3, which opens into the first of the two annular grooves and thus, together with the first of the two annular grooves, acts as a reservoir for grease.

[0040] The first radial bore is closed from the environment by means of a screw plug 4.

[0041] An axial bore, which is introduced into the sealing cover 3 and opens into the first radial bore, is designed in two parts. A first section of this axial bore is introduced into the sealing cover 3 and a second section of this axial bore is in the

[0042] Bearing cover 1 and opens into a second radial bore which is introduced into the bearing cover 1 and to which a grease supply line 2 is connected.

[0043] Thus, grease can be supplied via the grease supply line 2 to the second radial bore, which can then be supplied via the first and second sections of the axial bore to the first radial bore, which together with the first annular groove acts as a grease reservoir.

[0044] In the centrifugal ring 5, in particular in a third annular groove open in the radial direction towards the environment, a laminar ring 6 is recessed, which seals towards the sealing cover 3.

[0045] The first and second annular grooves are open in the axial direction towards the environment, in particular towards the sealing cover 3.

[0046] The first annular groove is arranged radially inside the second annular groove.

[0047] The radial direction, the axial direction, and the circumferential direction are each related to the direction of the rotational axis of the output shaft 10. Thus, the grease is supplied via different parts, namely the bearing cap 1 and the sealing cap 3. To align the sections of the two-part axial bore, the rotational positions of the bearing cap 1 and the sealing cap 3 must be coordinated. This requires a certain degree of precision during manufacturing.

[0048] The grease applied to the first ring groove improved the seal. In the event of frictional contact, which might occur in an emergency, the grease reduces frictional heat.

[0049] The radial clearance area covered by the two annular grooves is encompassed by the radial clearance area covered by the radial bore of the sealing cover 3. The two annular grooves are radially spaced from each other and arranged on the side of the slinger ring 5 facing the bearing cover 1.

[0050] The sealing cover 3 is fastened to the bearing cover 1 with screws, which are screwed into axially directed threaded holes in the bearing cover 1. Although the screws and / or the threaded holes are all arranged at the same radial distance from the axis of rotation of the output shaft 10, the hole pattern of the threaded holes does not exhibit rotational symmetry, in particular so that the rotational position is easily ensured during assembly.

[0051] In further embodiments according to the invention, the bearing cover 1 is made of a different material than the sealing flange 3.

[0052] List of reference symbols

[0053] I Bearing cover 2 Grease supply line

[0054] 3 sealing lids

[0055] 4 locking screw

[0056] 5 centrifugal disc

[0057] 6 Laminar ring 10 output shaft

[0058] II Housing

Claims

Patent claims:

1. A gearbox with a housing, wherein the housing has a through-bearing bore in which a bearing is accommodated that rotatably supports an output shaft of the gearbox, wherein an annular bearing cover of the gearbox has an axially projecting first collar region that projects into the bearing bore, in particular and bears against the bore wall of the bearing bore, wherein an annular sealing cover of the gearbox has an axially projecting second collar region that projects into the annular opening of the bearing cover, in particular and bears against the inner wall of the annular opening, characterized in that the sealing cover has, on its side facing away from the bearing cover, a first annular groove into which a first radial bore of the sealing cover opens, wherein a second radial bore of the bearing cover is connected to the first radial bore of the sealing cover via a two-part axial bore,wherein a first section of the axial bore is arranged in the bearing cover and a second section of the axial bore is arranged in the sealing cover, in particular wherein the first section is aligned with the second section., 2. Gearbox according to claim 1, characterized in that a shaft sealing ring is accommodated on the second collar region, which seals off the output shaft or a spacer bushing pushed onto the output shaft, in particular wherein a sealing lip of the shaft sealing ring touches the output shaft and a sealing seat is formed on the second collar region, onto which the shaft sealing ring is pushed, in particular wherein the spacer bushing is arranged axially between the inner ring of the bearing pushed onto the output shaft and a bearing nut screwed onto the output shaft.

3. Gearbox according to one of the preceding claims, characterized in that the first radial bore of the sealing cover is closed from the environment with a screw plug.

4. Gearbox according to one of the preceding claims, characterized in that the first radial bore of the sealing cover has a larger inner diameter than the axial bore, and / or that a grease supply line is connected to the second radial bore of the bearing cover.

5. Gearbox according to one of the preceding claims, characterized in that the sealing cover is fastened to the bearing cover by screws which are screwed into axially directed threaded holes in the bearing cover, wherein the screws and / or the threaded holes are all arranged at the same radial distance from the axis of rotation of the output shaft, wherein the drilling pattern of the threaded holes has no rotational symmetry, in particular the threaded holes are therefore unevenly spaced from one another in the circumferential direction.

6. Gearbox according to one of the preceding claims, characterized in that a second annular groove is formed on the sealing cover, which is aligned concentrically with the first annular groove and whose groove depth, in particular axial depth, is smaller than the groove depth, in particular axial depth, of the first annular groove.

7. Transmission according to one of the preceding claims, characterized in that the second annular groove is arranged radially outside the first annular groove.

8. Transmission according to one of the preceding claims, characterized in that a centrifugal disc has a third annular groove open in the radial direction, in which a laminar ring is arranged.

9. A transmission according to claim 8, characterized in that the centrifugal disc has a first annular projection which projects into the first annular groove.

10. Transmission according to claim 9, characterized in that the centrifugal disc has a second annular projection which projects into the second annular groove, - wherein the centrifugal disc is placed on the output shaft and is connected to the output shaft in a rotationally fixed manner or wherein the centrifugal disc is connected to the bearing nut screwed onto the output shaft in a rotationally fixed manner.

11. Gearbox according to one of the preceding claims, characterized in that the first and the second projection have the same axial height, in particular so that the space area of ​​the first annular groove filled with grease and air has a larger volume than the space area of ​​the second annular groove filled with grease and air.

12. Gearbox according to one of the preceding claims, characterized in that the first and second annular grooves are each open in the axial direction, in particular the third annular groove is open in the radial direction.

13. Gearbox according to one of the preceding claims, characterized in that the material of the sealing cover is a different material from the material of the bearing cover and / or that the sealing cover is made of a different material than the bearing cover.

14. Gearbox according to one of the preceding claims, characterized in that the radial spacing region covered by the first annular groove is arranged radially within the radial spacing region covered by the bearing cover or overlaps therewith.

15. Gearbox according to one of the preceding claims, characterized in that the two-part axial bore is arranged radially outside the first annular groove.

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