Drive device having ring gear and pinion gear
By designing the outer toothed portion of the casing surrounding the toothed ring in the drive device, forming a structure that is sealed toward the toothed ring, the problem of oil leakage caused by the toothed ring is solved, and effective sealing and lubrication effects are achieved.
Patent Information
- Application Number
- CN202311773790.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-06-24
AI Technical Summary
In the prior art, the tooth ring is prone to cause oil to leak into the environment in the drive device, and there is a lack of effective sealing measures.
A driving device is designed in which the outer tooth portion of the pinion meshes with the outer tooth portion of the tooth ring and surrounds the outer tooth portion of the tooth ring through the casing to form a structure sealed toward the tooth ring to prevent oil leakage.
It effectively prevents oil from leaking from the drive device into the environment, while ensuring that the tooth ring can be lubricated in the oil, extending the service life of the device.
Smart Images
Figure CN120194145A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a drive device having a toothed ring and a pinion. Background Art
[0002] It is generally known that a toothed ring can be driven by a pinion. Summary of the Invention
[0003] Therefore, the object of the present invention is to arrange the housing in the case of the toothed ring such that oil does not reach the environment from the inner space region surrounded by the housing.
[0004] According to the present invention, this object is achieved by a drive device having the features given in claim 1.
[0005] In the drive device, an important feature of the present invention is that the drive device has a toothed ring and a pinion, in particular, wherein the outer tooth portion of the pinion meshes with the outer tooth portion of the toothed ring to drive the toothed ring, and wherein at least a part of the housing of the drive device filled with oil surrounds the outer tooth portion of the toothed ring and is configured to be sealed towards the toothed ring.
[0006] The advantage here is that the housing prevents oil from leaking into the environment. Here, the toothed ring can be arranged on a drum, and the housing surrounds the outer tooth portion of the toothed ring in an oil-sealed manner, but nevertheless surrounds as small a volume as possible. For this purpose, the housing is sealed relative to the toothed ring especially radially inside the outer tooth portion.
[0007] In this way, the drum can be arranged radially inside the toothed ring, and the housing does not protect the drum, but rather protects the toothed ring, especially the outer tooth portion of the toothed ring.
[0008] For example, the drum is a drum of a cement mill.
[0009] The housing can be arranged statically, that is, especially held by feet.
[0010] In an advantageous design, the toothed ring is assembled from ring segments arranged successively in the circumferential direction with respect to the rotational axis of the toothed ring, especially connected to each other. The advantage here is that the ring segments can be machined on a machine with an extension dimension smaller than the outer diameter of the toothed ring. This machine can be implemented as a gear cutting machine and is used for grinding or milling the outer tooth portion.
[0011] In an advantageous design, each ring segment has an outer tooth portion and a bearing region, wherein the outer tooth portion of the ring segment is arranged radially outside the bearing region with respect to the axis of rotation of the toothed ring and in particular adjoins the bearing region. The advantage here is that the bearing region has flat surface sections on both sides at the ends, which surface sections adjoin, in the circumferential direction - in particular without interruption and / or directly - the corresponding surface sections of the bearing region adjacent in the circumferential direction. Thereby, the housing can be arranged to be sealed towards these flat surface regions arranged successively in the circumferential direction. Alternatively, however, the first part of the plate structure can be connected to the bearing region, and the first part is then arranged to be sealed relative to the second part by means of a seal, in particular an annular seal, wherein the second part is non-rotatably connected to the housing.
[0012] In an advantageous design, the radial region covered by the housing overlaps with the radial region covered by the toothed ring, and the radial region covered by the housing at least partially also includes a radial distance greater than that of the toothed ring. The advantage here is that the housing surrounds the toothed ring at its outer radial edge. For this purpose, the housing extends further outwards in the radial direction compared to the toothed ring.
[0013] In an advantageous design, the housing is assembled from housing segments arranged successively in the circumferential direction with respect to the axis of rotation of the toothed ring, in particular connected to each other, in particular wherein the housing segments adjacent to each other in the circumferential direction are connected to each other in an oil-tight manner, in particular by means of flat seals arranged in between in an oil-tight manner. The advantage here is that the housing segments can be machined simply, in particular on a machine tool with a smaller outer diameter than that of the toothed ring.
[0014] In an advantageous design, plate structures are respectively provided at both ends of the toothed ring, which plate structures form an annular main channel and an annular first side channel, in particular wherein the axis of rotation of the toothed ring is oriented coaxially with the axis of the main channel and / or with the axis of the first side channel. The advantage here is that the oil can be kept away from the seal by means of the channels of the plate structure and thus the seal is only slightly loaded with oil.
[0015] In an advantageous design, a partition plate is arranged in the first side channel, the partition plate having a radial extension diameter smaller than that of the first side channel, wherein the radial region covered by the first side channel includes the radial region covered by the partition plate, in particular wherein the first side channel has a greater radial distance than the partition plate. The advantage here is that the first side channel can be divided into two sub-channels by means of the partition plate, so that even less oil reaches the seal. However, the oil flows down from the two sub-channels into the main channel and then is transferred from there to the oil sump.
[0016] In an advantageous design, the first part of the plate structure is connected to the toothed ring and / or to the bearing area in a non-rotatable manner, and the second part of the plate structure, in particular the remaining part, is fixedly connected to the housing. The advantage here is that these channels can be realized by means of the plate structure and can thus be manufactured in a cost-effective and simple manner. The first part of the plate structure is preferably connected to the bearing area in an oil-tight manner. Thereby, the oil flowing out laterally from the outer teeth of the toothed ring enters the first part of the plate structure without entering the environment. A main channel and a first side channel are formed in the first part of the plate structure, so that the oil is then collected in the channels.
[0017] In an advantageous design, the housing surrounds the outer teeth of the toothed ring and is configured to be sealed towards the bearing area of the toothed ring or towards the first part of the plate structure, in particular in such a way that an annular seal is arranged in the middle and the ring axis of the annular seal is oriented coaxially with the rotational axis of the toothed ring. The advantage here is that the housing surrounds the outer teeth, and nevertheless the toothed ring can still be slipped onto a roller which is arranged outside the housing, in particular radially spaced from the housing and arranged radially inside the housing. Thus, although the outer teeth are arranged in oil, other components, such as a roller, can still be arranged radially inside the housing.
[0018] In an advantageous design, the main channel has a through opening at its radially outer periphery, in particular at its radially outer side surface, in particular an opening through which oil can pass. The advantage here is that in the upper region of the toothed ring, the oil flowing out laterally from the outer teeth of the toothed ring can directly enter the main channel, and in the lower region of the toothed ring, the oil can flow out into the oil sump of the housing.
[0019] In an advantageous design, the main channel and the first side channel are each non-permeable to oil at their respective radially inner peripheries, in particular at their respective radially inner side surfaces. The advantage here is that the oil entering the respective channels is collected and does not flow radially inwards.
[0020] In an advantageous design, the side wall of the main channel also serves as the side wall of the first side channel and has an opening through which oil can pass. The advantage here is that the oil can flow out of the first side channel into the main channel. For this purpose, preferably, the radially outer surface of the first side channel has a smaller outer diameter than the radially outer surface of the main channel.
[0021] In an advantageous design, the annular seal is arranged axially next to the first side channel and in particular adjoins the first side channel. The advantage here is that due to the main channel, only a small amount of oil reaches the first side channel, and then the first side channel conducts this oil away, so that the seal is loaded with a very small amount of oil. Thereby, the seal is not subjected to high oil pressure and achieves a high service life.
[0022] In an advantageous design, the annular cross-section of the seal is triangular, wherein the longest side of the triangle contacts the first part of the plate structure and is in particular sealed against this first part of the plate structure in this way. The advantage here is that the seal bears against the first part at a flat angle and thus wears less.
[0023] In an advantageous design, the radially outer peripheral part, in particular the radially outer side surface, of the main channel is connected to the second part of the plate structure, and the radially inner peripheral part, in particular the radially inner side surface, of the main channel is connected to the first part of the plate structure. The advantage here is that the oil can directly enter the main channel that rotates together with the toothed ring.
[0024] Other advantages result from the dependent claims. The invention is not limited to the feature combinations of the claims. For a person skilled in the art, other reasonable combinations of the claims and / or individual claim features and / or the features of the description and / or the features of the drawings result in particular from the purpose setting and / or from the purposes set by comparison with the prior art. Description of the Drawings
[0025] Now, the invention will be explained in detail with reference to the schematic drawings:
[0026] Figure 1 The drive device according to the invention with a toothed ring for a rotatably supported drum, in particular, is shown in an oblique view.
[0027] Figure 2 The drive device is shown in a side view.
[0028] Figure 3 A cross-section through the upper region of the toothed ring is shown.
[0029] Figure 4 A cross-section through the lower region of the toothed ring is shown.
[0030] List of Reference Signs:
[0031] 1 Ring segment
[0032] 2 Housing segment
[0033] 3 Input shaft
[0034] 4 Support
[0035] 20 Outer teeth of the ring segment
[0036] 21 Oil
[0037] 30 Main channel
[0038] 31 First side channel
[0039] 32 Partition plate
[0040] 33 Seals Detailed Implementation Manner
[0041] As shown in the figure, the drive device has a toothed ring, which is assembled from ring segments 1 that are arranged successively in the circumferential direction with reference to the rotation axis of the toothed ring, are interconnected, and are each provided with a toothed portion 20.
[0042] Each ring segment has a load-bearing area, wherein the toothed portion 20 of the corresponding ring segment 1 is arranged radially outside the load-bearing area.
[0043] The toothed portion 20 of the ring segment 1 forms the external toothed portion of the toothed ring.
[0044] The pinion gear, which is non-rotatably connected to the input shaft 3, in particular by means of a key, meshes with the external toothed portion of the toothed ring using its external toothed portion.
[0045] The housing surrounds the toothed portion of the toothed ring and the pinion gear to ensure lubrication with oil without the oil leaking out into the environment.
[0046] For this purpose, the housing is assembled from housing segments 2 that are arranged successively in the circumferential direction with reference to the rotation axis of the toothed ring. Here, sealing material is respectively arranged in the middle between the housing segments 2 that are adjacent to each other in the circumferential direction, so that the housing segments 2 are connected to each other in an oil-tight manner. Alternatively, however, a welded connection of the housing segments 2 can also be carried out.
[0047] The toothed ring is fastened to a drum to be driven, which is not shown in the figure.
[0048] The housing is supported by supports 4, which stand on the ground of the industrial facility.
[0049] A plate structure is constructed radially inside the toothed portion of the toothed ring, and this plate structure forms a channel for capturing oil, keeping the oil away from the seal 33, and guiding the oil back to the oil sump.
[0050] The seal 33 is configured as a ring seal and is made of a low-wear material because the seal is arranged between the statically arranged housing and the rotating section of the plate structure.
[0051] The rotating section of the plate structure is non-rotatably connected to the load-bearing area of the ring segment 1.
[0052] Since the plate structure is arranged at the end side of the toothed ring and is arranged radially inside the external toothed portion of the toothed ring, as Figure 3 shown, the oil flows laterally, especially in two axial directions, out of the external toothed portion of the toothed ring in the uppermost region of the toothed ring. Here, most of the oil reaches the main channel 30 formed by the plate structure, which is directly axially adjacent to the corresponding end side of the toothed ring.
[0053] To this end, the main channel 30 is permeable to oil at its radially outer edge region, so that oil can flow into the main channel 30. However, the radially inner edge region of the main channel is impermeable to oil.
[0054] The main channel 30 is configured as an annulus and accordingly forms an annular groove that circumscribes in the circumferential direction with respect to the rotational axis of the gear ring. Here, the ring axis is coaxial with the rotational axis of the gear ring.
[0055] Axially beside the main channel, a first side channel 31 of plate structure and arranged concentrically with the main channel is constructed. By means of a partition plate 32 extending radially inward from the radially inner end of the first side channel 31, the first side channel 31 is divided into two interconnected regions. The first side channel 31 is axially arranged between the seal 33, in particular an annular seal, and the main channel 30.
[0056] The region covered by the main channel 30 in the radial direction, i.e., in particular the radial region covered by the main channel 30 - in particular with respect to the rotational axis of the gear ring - overlaps with the radial region covered by the seal 33, and also overlaps with the radial region covered by the first side channel 31 and with the radial region covered by the partition plate 32.
[0057] The first side channel 31 abuts directly against the seal 33 axially.
[0058] By arranging these two channels and dividing the first side channel 31 by means of the partition plate 32, multi - level safety is achieved in terms of keeping oil away from the seal 33.
[0059] The seal 33 seals against the rotating part of the plate structure, which is non - rotatably connected to the gear ring.
[0060] The axial width of the main channel 30 is greater than the axial width of the first side channel 31.
[0061] As Figure 4 shown, the outer diameter of the first side channel 31 is smaller than the outer diameter of the main channel 30. Therefore, oil flows from the first side channel 31 into the main channel 30 in the lower region shown. To this end, the side wall of the main channel 30 is permeable to oil. Figure 4 In the radially outer edge region of the main channel 30, in particular through the same openings for allowing oil to seep into the main channel 30 in the upper region shown, oil exits the main channel 30 and flows into the oil sump.
[0062] In the radially outer edge region of the main channel 30, in particular Figure 3 through the same openings for allowing oil to seep into the main channel 30 in the upper region shown, oil exits the main channel 30 and flows into the oil sump.
[0063] Since the radial extension dimension of the partition plate 32 is smaller than that of the first side channel 31, the oil in the first side channel 31 flows into the main channel 30 not in two divided regions but altogether.
[0064] The oil level in the housing is so high that the engaged area of the pinion is covered by the oil 21.
[0065] Additionally, an oil transfer wheel can also be driven by the pinion, which causes an oil flow in the oil sump and thereby prevents the precipitation of oil sludge, etc.
[0066] Here, the oil transfer wheel is implemented as a gear with an involute tooth profile that is particularly corrosion-resistant. The external involute teeth of this gear mesh with the external teeth of the pinion and are arranged in the oil, i.e., at least partially below the oil level. Preferably, the oil transfer wheel is implemented as a plastic injection molding.
[0067] In other embodiments according to the invention, the plate structure part forming the main channel 30 and the first side channel 31 is connected to the gear ring in a non-rotatable manner, i.e., is particularly configured to rotate together with the gear ring.
Claims
1. A drive device having a toothed ring and a pinion, In particular, among them, the outer tooth portion of the pinion meshes with the outer tooth portion of the toothed ring to drive the toothed ring, characterized in that at least a part of the housing of the drive device that is filled with oil surrounds the outer tooth portion of the toothed ring and is configured to be sealed towards the toothed ring.
2. The drive device according to claim 1, characterized in that, The toothed ring is assembled from ring segments that are arranged successively in the circumferential direction with respect to the rotational axis of the toothed ring, especially are connected to each other respectively.
3. The drive device according to any one of the above claims, characterized in that, Each ring segment has an outer tooth portion and a bearing area, wherein the outer tooth portion of the ring segment is arranged radially outside the bearing area with respect to the rotational axis of the toothed ring, especially adjacent to the bearing area.
4. The drive device according to any one of the above claims, characterized in that, The radial area covered by the housing overlaps with the radial area covered by the toothed ring, and the radial area covered by the housing at least partially also includes a larger radial distance than the toothed ring.
5. The drive device according to any one of the above claims, characterized in that the housing is assembled from housing segments that are arranged successively in the circumferential direction with respect to the rotational axis of the toothed ring, especially are connected to each other respectively, especially wherein the housing segments that are adjacent to each other in the circumferential direction are connected to each other in an oil-tight manner, especially are connected to each other in an oil-tight manner by means of flat seals arranged in the middle respectively.
6. The drive device according to any one of the above claims, characterized in that plate structures are respectively provided at both end sides of the toothed ring, the plate structures form an annular main channel and an annular first side channel, especially wherein the rotational axis of the toothed ring is oriented coaxially with the ring axis of the main channel and / or with the ring axis of the first side channel.
7. The drive device according to any one of the above claims, characterized in that a partition plate is arranged in the first side channel, and the radial extension dimension of the partition plate is smaller than that of the first side channel, the radial area covered by the first side channel includes the radial area covered by the partition plate, especially wherein the first side channel has a larger radial distance than the partition plate.
8. The drive device according to any one of the preceding claims, characterized in that, A first part of the plate structure is connected to the toothed ring and / or to the bearing area in a non-rotatable manner, and a second part of the plate structure, especially the remaining part, is fixedly connected to the housing.
9. The drive device according to any one of the above claims, characterized in that the housing surrounds the outer tooth portion of the toothed ring, and the housing is configured to be sealed towards the bearing area of the toothed ring or towards the first part of the plate structure, especially in such a way that an annular seal is arranged in the middle, and the ring axis of the annular seal is oriented coaxially with the rotational axis of the toothed ring.
10. The drive device according to any one of the above claims, characterized in that, The main channel has a through opening at its radially outer peripheral portion, especially at its radially outer side surface, especially, the opening allows oil to pass through.
11. The drive device according to any one of the above claims, characterized in that, The main channel and the first side channel are respectively impermeable to oil at their respective radially inner peripheral portions, especially at their respective radially inner side surfaces.
12. The drive device according to any one of the above claims, characterized in that, The side wall of the main channel also serves as the side wall of the first side channel and has an opening that allows oil to pass through.
13. The drive device according to any one of the above claims, characterized in that, The annular seal is arranged axially beside the first side channel, especially adjacent to the first side channel.
14. The drive device according to any one of the above claims, characterized in that, The ring cross-section of the annular seal is triangular, and the longest side of the triangle contacts the first part of the plate structure, especially seals towards the first part of the plate structure thereby.
15. The drive device according to any one of the above claims, characterized in that The radially outer peripheral portion of the main channel, particularly the radially outer side surface, is connected to the second part of the plate structure. The radially inner peripheral portion of the main channel, particularly the radially inner side surface, is connected to the first part of the plate structure.