Drive comprising an annular gear driven by a pinion

Abstract

The invention relates to a drive which comprises an annular gear driven by a pinion, the external toothing of the pinion meshing with the external toothing of the annular gear, and the external toothing of the annular gear also meshing with a toothing of a conveying wheel.

Description

[0001] Drive with a toothed ring driven by a pinion

[0002] Description:

[0003] The invention relates to a drive with a toothed ring driven by a pinion.

[0004] It is generally known that a drive comprises a gearbox driven by an electric motor.

[0005] The closest state of the art is a gearbox known from CN 215464 878 U.

[0006] From DE 748 665 A a drive for the printing cylinder of a two-speed high-speed press is known.

[0007] A gearbox is known from CN 105 317 982 A.

[0008] A gearbox with oil conveyor wheels is known from Rll 2 497 032 C1.

[0009] DE 102006 013 865 A1 discloses a gear lubrication module for the automatic lubrication of gears.

[0010] An automatic lubrication supply is known from KR 10 - 1596719 B1.

[0011] A lubrication supply for a pinion is known from US 2017 / 0 343 097 A1.

[0012] A lubricating pinion arrangement is known from DE 202020 107 366 U1.

[0013] A system for supplying a gear with lubricant is known from DE 102010 040 417 A1.

[0014] From DE 102008 054 189 A1 a ring segment of a segmented toothed ring is known.

[0015] ISI \ EIDOPAT 19.11.2024 A segmented toothed ring is known from US 3 186255 A.

[0016] The invention is therefore based on the object of producing a drive that is cost-effective and easy to manufacture.

[0017] According to the invention, the object is achieved by the drive according to the features specified in claim 1.

[0018] Important features of the invention in the drive are that the drive is provided with a toothed ring driven by a pinion, wherein the external toothing of the pinion is in engagement with the external toothing of the toothed ring, wherein the external toothing of the pinion is also in engagement with a toothing of a conveyor wheel.

[0019] The advantage here is that the pinion not only drives the gear ring, but also a feed wheel for moving and / or mixing the oil in the oil sump. For this purpose, the feed wheel is not arranged coaxially with the pinion; instead, the feed wheel's rotational axis is aligned parallel to the pinion's rotational axis and spaced apart from it.

[0020] In an advantageous embodiment, the conveyor wheel has involute teeth that mesh with the external teeth of the pinion. This is advantageous because the conveyor wheel can be manufactured as a plastic injection-molded part, making it cost-effective to produce. The plastic is extremely hard and highly wear-resistant.

[0021] In an advantageous embodiment, the conveyor wheel is made of plastic, in particular of polyformaldehyde, in particular of polyoxymethylene. The advantage here is that a solid, low-wear, i.e. abrasion-resistant, material can be used. In an advantageous embodiment, the conveyor wheel has a central bore, in particular an axially continuous bore, into which outer rings of rolling bearings are inserted and / or received, the inner rings of which are mounted on an axle, in particular wherein the axle is directly or indirectly connected to the housing of the drive in a rotationally fixed manner. The advantage here is that the bearing of the conveyor wheel can be efficiently lubricated with lubricant. In particular, a free space is created by means of the central bore, which is at least partially filled with oil and borders on the bearings, such that the bearings can be supplied with oil as a lubricant directly from the free space.

[0022] In an advantageous embodiment, the conveyor wheel has radially continuous bores, in particular radial bores, which open into the central bore. This is advantageous in that improved lubrication can be achieved.

[0023] In another advantageous embodiment, the conveyor wheel has holding sections extending radially relative to the rotational axis of the conveyor wheel, wherein each holding section holds a single roller, in particular a cylindrical roller, with the cylinder axis aligned parallel to the rotational axis of the conveyor wheel. It is advantageous that the roller is held by the holding section and thus the material of the holding section differs from that of the roller. For example, the holding section is made of steel and the roller is made of plastic.

[0024] In an advantageous embodiment, a respective engaged roller is located in a gap in the involute toothing of the pinion, in particular, wherein the respective engaged roller rests against the external toothing of the pinion. Advantageously, the involute toothing of the pinion engages, on the one hand, with the involute toothing of the gear ring and, on the other hand, with the feed wheel, which conveys the oil flow in the oil reservoir surrounded by the housing.

[0025] In an advantageous embodiment, the rollers are each made of plastic, in particular polyformaldehyde, especially polyoxymethylene. This is advantageous in that the conveyor wheel has little mass while still causing the oil to move. In an advantageous embodiment, the gear ring is composed of ring segments arranged one behind the other in the circumferential direction. This is advantageous in that the gear cutting machine only has to produce the small ring segments, so that the gear ring has an outer diameter that is larger than the maximum length of the gear cutting machine used to produce the gearing of the ring segment.

[0026] In an advantageous embodiment, the housing of the drive at least partially surrounds the gear ring, with a seal formed between the ring segments and the housing, the housing being at least partially filled with oil. Advantageously, the gear teeth of the gear ring are supplied with oil, thus lubricating the meshing.

[0027] In an advantageous embodiment, the impeller is completely surrounded by oil. This is advantageous because the movement of the oil from the impeller can be driven directly in the oil in the oil sump.

[0028] In an advantageous embodiment, the pinion is driven by an electric motor, in particular, the pinion is rotationally fixedly connected to the rotor shaft of the electric motor. Advantageously, the pinion has a higher rotational speed than the gear ring, thus enabling the movement of the oil from the feed wheel to occur at a high speed.

[0029] In an advantageous embodiment, the toothed ring is fastened to a drum by means of holding parts, in particular wherein the clear inner diameter of the toothed ring is larger than the maximum outer diameter of the drum. It is advantageous in this case that the holding parts are fastened to the drum and hold the toothed ring. For this purpose, the holding parts preferably extend in a tangential direction relative to the outer diameter of the drum. Further advantages arise from the subclaims. The invention is not limited to the combination of features of the claims. Those skilled in the art will recognize further useful combinations of claims and / or individual claim features and / or features of the description and / or the figures, in particular from the task and / or the task posed by comparison with the prior art.

[0030] The invention will now be explained in more detail using schematic illustrations:

[0031] Figure 1 shows a first drive according to the invention with a conveyor wheel 5 for conveying oil, schematically in side view.

[0032] Figure 2 shows the conveyor wheel 5 in side view.

[0033] Figure 3 shows a longitudinal section of the conveyor wheel 5 including the bearing arrangement for the same.

[0034] Figure 4 shows a second drive according to the invention in which, in contrast to the drive according to Figure 1, a second conveyor wheel 40 is provided instead of the first conveyor wheel 5.

[0035] Figure 5 shows a cross section through the second conveyor wheel 40.

[0036] Figure 6 shows a longitudinal section through the second conveyor wheel 40 including the bearing arrangement for the same.

[0037] As shown in Figures 1 to 3, the drive has a toothed ring which is composed of ring segments 1 arranged one behind the other in the circumferential direction.

[0038] The toothed ring, in particular the ring segments 1 of the toothed ring, is fastened to a drum, in particular a cement mill, by means of holding parts 2, in particular for driving the drum.

[0039] The ring segments 1 have a toothing on their radial outer side, which forms the external toothing of the toothed ring.

[0040] A pinion 6, driven by a gear motor, meshes with the external gearing and thus drives the gear ring. Furthermore, the first conveyor wheel 5 meshes with the pinion 6 and is thus driven by it. A housing 4, particularly a sheet metal housing, surrounds the pinion 6 and the external gearing of the gear ring, allowing oil to be provided as a lubricant in the meshing area between the pinion 6 and the external gearing of the gear ring. The housing 4 prevents oil from splashing into the environment.

[0041] The first conveyor wheel 5 is arranged, particularly in the direction of gravity, below the pinion 6 and conveys an oil flow. In particular, the pinion 6 is arranged below the rotational axis of the gear ring in the direction of gravity.

[0042] The first conveyor wheel 5 has a toothing formed from rollers 21, wherein each tooth of the toothing comprises one of the rollers 21, which is held by a holding section 20. The respective roller 21 is preferably cylindrical, wherein the cylinder axis is aligned parallel to the rotational axis of the toothed ring and parallel to the rotational axis of the pinion.

[0043] The first conveyor wheel 5 is rotatably mounted. Its rotational axis is also aligned parallel to the rotational axis of the pinion 6. The holding sections 20 of the first conveyor wheel 5 extend radially from a hollow cylindrical sleeve part, which is mounted on a shaft 31 and has radially directed, through-bores 30, to the respective roller 21.

[0044] The sleeve part is lubricated with lubricating oil and mounted on the shaft 31 by means of the radial bores 30.

[0045] The shaft 31 is rotatably mounted on the housing 4 or on a part connected to the housing 4 via rolling bearings.

[0046] The housing 4 is preferably composed of sheet metal parts and prevents the leakage of oil which lubricates the tooth engagement between the toothed ring and the pinion 6.

[0047] The rollers 21 are preferably made of a plastic, in particular polyformaldehyde, especially polyoxymethylene. Thus, each of the rollers 21 has a high degree of hardness, high wear resistance, and is designed to be as rigid as possible. The external toothing of the pinion 6 is involute, and each engaged roller is located in a gap in the involute toothing of the pinion 6.

[0048] The first conveyor wheel 5 is arranged completely in the oil, in particular below the oil level.

[0049] As shown in Figures 4 to 6, instead of the first conveyor wheel 5, a second conveyor wheel 40 can be provided, which is externally toothed with an involute toothing instead of the rollers 21 and the holding sections 20.

[0050] This second conveyor wheel 40 has a central, axially continuous central bore in which the outer rings of bearings 61 are received, the inner rings of which are mounted on an axle 60. The outer diameter of the axle 60 is smaller than the inner diameter of the central bore, so that a hollow cylindrical free space 62 is formed radially between the second conveyor wheel 40 and the axle 60, in particular and axially between the two bearings 61, which can be at least partially filled with lubricant, in particular lubricating oil.

[0051] The axis 60 is held by supports which are connected to the housing 4.

[0052] The second conveyor wheel 40 is arranged completely in the oil, in particular below the oil level.

[0053] In further embodiments according to the invention, the second conveyor wheel 40 is designed with radial bores, which are preferably located in a respective tooth gap, in particular in the root area of ​​the toothing, and open into the free space 62. This improves the lubrication and cooling of the bearings 61. List of reference symbols

[0054] 1 Ring segment 2 Holding part

[0055] 3 Support part

[0056] 4 housings

[0057] 5 conveyor wheel

[0058] 6 pinion 20 holding section

[0059] 21 roll

[0060] 30 radial bore

[0061] 31 Wave

[0062] 40 conveyor wheel 60 axle

[0063] 61 warehouses

[0064] 62 Free space, in particular hollow cylindrical free space

Claims

Patent claims: Patent claims:

1. Drive with a toothed ring driven by a pinion, the external toothing of the pinion being in engagement with the external toothing of the toothed ring, characterized in that the external toothing of the pinion is also in engagement with a toothing of a conveyor wheel.

2. Drive according to claim 1, characterized in that the conveyor wheel has an involute toothing which is in engagement with the external toothing of the pinion.

3. Drive according to one of the preceding claims, characterized in that the conveyor wheel is made of plastic, in particular of a polyformaldehyde, in particular of polyoxymethylene.

4. Drive according to one of the preceding claims, characterized in that the conveyor wheel has a central bore, in particular an axially continuous bore, into which outer rings of rolling bearings are inserted and / or received, the inner rings of which are placed on an axle, in particular wherein the axle is connected directly or indirectly in a rotationally fixed manner to the housing of the drive.

5. Drive according to one of the preceding claims, characterized in that the conveyor wheel has radially through bores, in particular radial bores, which open into the central bore.

6. Drive according to claim 1, characterized in that the conveyor wheel has holding sections extending in a radial direction with respect to the axis of rotation of the conveyor wheel, each holding section holding a single roller, in particular a cylindrical roller, the cylinder axis being aligned parallel to the axis of rotation of the conveyor wheel.

7. Drive according to claim 6, characterized in that a respective engaged roller is located in a gap of the involute toothing of the pinion, in particular wherein the respective engaged roller rests against the external toothing of the pinion.

8. Drive according to one of claims 7 or 6, characterized in that the rollers are each made of plastic, in particular of a polyformaldehyde, in particular of polyoxymethylene.

9. Drive according to one of the preceding claims, characterized in that the toothed ring is composed of ring segments arranged one behind the other in the circumferential direction.

10. Drive according to one of the preceding claims, characterized in that the housing of the drive at least partially surrounds the toothed ring.

11. Drive according to one of the preceding claims, characterized in that a seal is formed between the ring segments and the housing, wherein the seal is arranged radially within the toothing, in particular external toothing, of the ring segment(s) with respect to the axis of rotation of the toothed ring, in particular wherein the seal seals from the housing to the ring segments.

12. Drive according to one of the preceding claims, characterized in that the housing is at least partially filled with oil.

13. Drive according to one of the preceding claims, characterized in that the conveyor wheel is completely surrounded by oil.

14. Drive according to one of the preceding claims, characterized in that the pinion is driven by an electric motor, in particular wherein the pinion is rotationally connected to the rotor shaft of the electric motor.

15. Drive according to one of the preceding claims, characterized in that the toothed ring is fastened to a drum by means of holding parts, in particular wherein the clear inner diameter of the toothed ring is larger than the maximum outer diameter of the drum.

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