A radial telescopic composite compensation coupling for connecting a wind power main shaft and a planet carrier

Abstract

This invention discloses a radially nested composite compensating coupling for connecting a wind turbine main shaft and a planetary carrier. It includes a large-diameter drum-tooth connecting unit, a transition connector, an elastic compensating connecting unit, a reducing bearing component, and a small-diameter drum-tooth connecting unit arranged coaxially. The large-diameter drum-tooth connecting unit is connected to either the main shaft or the planetary carrier, while the small-diameter drum-tooth connecting unit is connected to the other. The reducing bearing component gradually decreases in diameter from its large end to its small end. At least a portion of the small-diameter drum-tooth connecting unit, the reducing bearing component, and the elastic compensating connecting unit are located within the radial envelope of the large-diameter drum-tooth connecting unit, forming a radially nested arrangement. This coupling combines reducing bearing capacity, double-sided drum-tooth compensation, and central elastic compensation functions, making it suitable for low-speed, high-torque wind turbine drive systems with limited installation space.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission connection technology, and in particular to a radially stacked composite compensating coupling for connecting the wind turbine main shaft and the planetary carrier. It is suitable for wind turbine transmission systems with low speed and high torque, different diameter connections, limited installation space, and composite misalignment requirements. Background Technology

[0002] In wind power transmission systems, the connection structure between the main shaft and the planetary carrier typically needs to simultaneously meet requirements such as high torque transmission, misalignment compensation, different diameter transitions, and compact layout. Due to the significant differences in structural dimensions, installation space, and load characteristics between the main shaft side and the planetary carrier side, the connection between them often falls into a complex scenario involving low speed, high torque, different diameters, and limited installation space.

[0003] In the existing technology, if a rigid connection structure is used, although torque transmission can be achieved, it lacks the ability to compensate for angular deviations, radial offsets or axial displacements caused by factors such as installation errors, manufacturing errors, operational deflection, housing deformation and thermal expansion between the spindle and the planetary carrier. This can easily lead to increased additional loads, local stress concentration and reduced lifespan of related components.

[0004] While a single drum-shaped gear coupling can compensate for angular and radial misalignments within a certain range using the spatial meshing characteristics of the drum-shaped gear pair, its compensation function is mainly concentrated in the gear pair itself. Under conditions of short axial arrangement, large additional load, or combined misalignment, the drum-shaped gear pair is prone to bearing high local contact loads, leading to problems such as off-center loading, edge contact, and increased contact stress.

[0005] If a single elastic element coupling is used, such as a diaphragm type, bellows type, or leaf spring type coupling, although it can absorb a certain amount of misalignment and displacement through elastic deformation, it still has certain limitations in terms of load-bearing capacity, structural stiffness, and adaptability to different diameters in the low-speed, high-torque, and differential bearing transition scenarios required for the connection between the wind turbine main shaft and the planetary carrier.

[0006] Furthermore, existing connection structures often employ a tandem arrangement along the axial direction, which typically requires a significant amount of axial installation space. This makes it difficult to achieve a highly integrated arrangement within the limited installation area between the main shaft and the planetary carrier. Especially in wind power transmission systems, the connection points must meet the requirements for high load transmission and misalignment compensation while minimizing the additional axial dimensions to reduce the adverse impact on the overall drivetrain layout.

[0007] Therefore, existing technologies still lack a spindle and planetary carrier connection structure that can simultaneously achieve high torque transmission, double-sided misalignment compensation, differential bearing transition, and compact space arrangement. Summary of the Invention

[0008] The purpose of this invention is to provide a radially stacked composite compensation coupling for connecting the wind turbine main shaft and the planetary carrier, in order to solve the problems in the prior art where rigid connections are difficult to compensate for misalignment, single drum-shaped gear couplings have concentrated compensation functions and high risk of local contact, single elastic element couplings are difficult to meet the needs of large torque and different diameter connections, and traditional axial tandem structures have large axial dimensions.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: A radially stacked composite compensation coupling for connecting a wind turbine main shaft and a planetary carrier includes a large-diameter drum-shaped toothed coupling unit, a transition connection structure, an elastic compensation coupling unit, a differential bearing structure, and a small-diameter drum-shaped toothed coupling unit connected sequentially along the force transmission path.

[0010] The large-diameter drum-shaped gear connecting unit includes a large-diameter outer drum-shaped gear ring and a large-diameter inner gear ring that mesh with each other; the small-diameter drum-shaped gear connecting unit includes a small-diameter outer drum-shaped gear ring and a small-diameter inner gear ring that mesh with each other; the large-diameter drum-shaped gear connecting unit and the small-diameter drum-shaped gear connecting unit are respectively connected to one of the main shaft and the planet carrier to form a torque transmission path between the main shaft and the planet carrier.

[0011] The transition connection structure connects the large-diameter drum-shaped tooth connection unit and the elastic compensation connection unit; the differential bearing structure connects the elastic compensation connection unit and the small-diameter drum-shaped tooth connection unit, and the whole structure gradually narrows from the large-diameter end to the small-diameter end.

[0012] At least a portion of the small-diameter drum-shaped tooth connecting unit, the differential bearing structure, and the elastic compensation connecting unit are located within the radial envelope of the large-diameter drum-shaped tooth connecting unit, forming a radially nested arrangement.

[0013] The phrase "within the radial envelope of the large-diameter drum-shaped toothed coupling unit" as used in this article refers to the fact that, when viewed along the axis of the coupling, at least a portion of the relevant components are located within the radial projection range defined by the outer contour of the large-diameter drum-shaped toothed coupling unit.

[0014] The large-diameter drum-shaped tooth connecting unit and the small-diameter drum-shaped tooth connecting unit respectively constitute drum-shaped tooth compensation pairs located at both ends of the coupling, and the elastic compensation connecting unit is disposed between the two drum-shaped tooth connecting units.

[0015] Furthermore, the transition connection structure is a flange, which is connected to the large-diameter outer convex toothed ring and the elastic compensation connection unit respectively. The flange is provided with a flange stop, a connection hole for connecting the flange and the large-diameter outer convex toothed ring, and a connection hole for connecting the flange and the elastic compensation connection unit.

[0016] Furthermore, the differential bearing structure is a conical skeleton, the large end of which is connected to the elastic compensation connecting unit, and the small end of which is integrally formed or fixedly connected to the small-diameter internal gear ring; the conical skeleton is provided with a stop that mates with the elastic compensation connecting unit and a connecting hole for connecting the conical skeleton and the elastic compensation connecting unit, and the conical skeleton is a hollow conical shell structure, a conical cylinder structure, or a conical support structure with reinforcing ribs.

[0017] Furthermore, the elastic compensation connection unit is an elastic element coupling, which is any one of a metal diaphragm coupling, a bellows coupling, a thin-walled elastic cylindrical shell coupling, or a flexible leaf spring coupling; when the elastic element coupling is a metal diaphragm coupling, the metal diaphragm coupling is a single diaphragm structure, a double diaphragm structure, or a multi-layer stacked structure.

[0018] Furthermore, the large-diameter outer convex toothed ring and the large-diameter inner toothed ring form a large-diameter convex toothed compensation pair near the large-diameter end, and the small-diameter outer convex toothed ring and the small-diameter inner toothed ring form a small-diameter convex toothed compensation pair near the small-diameter end, and the working diameter of the large-diameter convex toothed connecting unit is greater than the working diameter of the small-diameter convex toothed connecting unit.

[0019] Furthermore, the large-diameter internal gear ring is connected to the main shaft, and the small-diameter drum-shaped gear connecting unit is connected to the planetary carrier; the large-diameter internal gear ring is disposed at the rear end of the main shaft and is integrally formed from the inner wall of the main shaft towards the center, or is fixed to the inner wall of the main shaft through a connecting structure; the large-diameter drum-shaped gear connecting unit is at least partially arranged in the inner cavity or envelope space of the rear end of the main shaft.

[0020] In addition, the present invention can also adopt a configuration in which a large-diameter internal gear ring is connected to the planetary carrier and a small-diameter drum-shaped gear connecting unit is connected to the main shaft.

[0021] The composite compensation mechanism of this invention is hierarchical series compensation.

[0022] The first level of compensation is spatial orientation compensation for the drum-shaped teeth. That is, when there are installation errors, manufacturing errors, operational deflection, housing deformation, or combined misalignment between the spindle and the planetary carrier, the drum-shaped teeth on both sides adapt to the angular deviation and radial offset by changing the tooth surface curvature and spatial meshing relationship.

[0023] The second level of compensation is elastic compensation by elastic elements. That is, the elastic compensation connection unit located in the middle, while transmitting torque, further releases the remaining angular deviation, radial offset, axial displacement, thermal expansion error, and non-torque additional load that were not completely absorbed by the drum-shaped tooth pairs on both sides through its own elastic deformation.

[0024] In the above structure, the drum-shaped toothed connecting unit mainly undertakes the function of spatial orientation adaptation, while the elastic compensation connecting unit mainly undertakes the function of further flexible release. The two form a composite compensation relationship that is connected in the same force transmission chain, which is conducive to improving the overall load condition and reducing the risk of local off-center load and edge contact caused by concentrated load on a single compensation component.

[0025] In addition to the preferred configuration where the large-diameter internal gear ring is arranged at the rear end of the spindle, the present invention can also adopt a configuration where the large-diameter internal gear ring is connected to the planetary carrier and the small-diameter drum-shaped tooth connecting unit is connected to the spindle, as another optional embodiment of the present invention.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects: First, by setting drum-shaped tooth compensation pairs at both ends of the coupling, primary compensation can be made for the angular deviation and radial offset between the main shaft and the planetary carrier, thereby improving the adaptability to complex misalignment conditions.

[0027] Secondly, by setting an elastic compensation connection unit between the two ends of the drum-shaped tooth compensation pair, the remaining angular deviation, axial displacement, thermal expansion error and non-torque additional load can be further released, thereby improving the overall load condition and reducing the risk of concentrated load on a single compensation component.

[0028] Third, by setting up a differential bearing structure, the bearing transition from the large diameter end to the small diameter end can be realized, thereby meeting the high torque differential connection requirements between the wind turbine main shaft and the planetary carrier.

[0029] Fourth, by adopting a radially nested arrangement, at least some of the structures in the small-diameter drum-shaped tooth connection unit, the differential bearing structure, and the elastic compensation connection unit are located within the radial envelope of the large-diameter drum-shaped tooth connection unit, which helps to reduce the added axial dimension of the coupling and improve the structural compactness.

[0030] Fifth, the present invention organically combines double-end drum-shaped tooth compensation, middle elastic compensation, differential bearing transition and radial stacking compact arrangement to form a composite compensation and bearing synergy relationship in the same power transmission chain. Therefore, it is suitable for wind power transmission systems with low speed, high torque, limited installation space and composite misalignment requirements. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a large-diameter internal gear ring arranged at the rear end of the main shaft in a preferred embodiment of the present invention; Figure 3 This is a cross-sectional view of a large-diameter internal gear ring arranged at the rear end of the main shaft in a preferred embodiment of the present invention. Figure 4 This is a schematic diagram of the overall structure of another optional configuration of the present invention; Figure 5 This is a schematic diagram of a metal diaphragm coupling in a preferred embodiment of the present invention; Figure 6 This is a schematic diagram of the drum-shaped teeth in an embodiment of the present invention; Figure 7 This is a schematic diagram of the hierarchical series compensation relationship in an embodiment of the present invention; Figure 8 This is a schematic diagram of the hierarchical series compensation structure in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures 1. Large-diameter bulging toothed ring; 2. Flange; 21. Flange stop; 22. Connection hole between flange and large-diameter external bulging gear ring; 23. Connection hole between flange and metal diaphragm coupling; 3. Metal diaphragm coupling; 31. Metal diaphragm coupling stop; 32. Connection hole between metal diaphragm coupling and flange; 33. Connection and fastening holes between the metal diaphragm and the metal diaphragm coupling disc; 4. Conical skeleton; 41. The mating stop between the tapered frame and the metal diaphragm coupling; 42. Connection hole between the tapered frame and the metal diaphragm coupling; 5. Small-diameter bulging toothed ring; 6. Small-diameter internal gear ring; 7. Large-diameter internal gear ring; 8. Spindle; 9. Planetary support; 10. Large-diameter drum-shaped teeth get stuck; 11. Small-diameter drum-shaped teeth get stuck. Detailed Implementation

[0033] The embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. For those skilled in the art, equivalent substitutions or conventional modifications to the structural form, connection method, and component arrangement without departing from the concept of the present invention should all fall within the scope of protection of the present invention.

[0034] The phrase "within the radial envelope of the large-diameter drum-shaped toothed coupling unit" as used in this article refers to the fact that, when viewed along the axis of the coupling, at least a portion of the relevant components are located within the radial projection range defined by the outer contour of the large-diameter drum-shaped toothed coupling unit.

[0035] Example 1: Configuration for connecting a large-diameter internal gear ring to a spindle like Figure 1 As shown, and in combination Figures 2 to 6 This embodiment provides a radially stacked composite compensating coupling for connecting a wind turbine main shaft to a planetary carrier. The coupling includes a large-diameter drum-shaped toothed connecting unit, a transition connection structure, an elastic compensating connecting unit, a differential bearing structure, and a small-diameter drum-shaped toothed connecting unit, connected sequentially along the force transmission path.

[0036] The large-diameter drum-shaped gear connecting unit includes a large-diameter outer drum-shaped gear ring 1 and a large-diameter inner gear ring 7. The large-diameter inner gear ring 7 is located at the rear end of the main shaft 8 and connected to the main shaft 8. In one embodiment, the large-diameter inner gear ring 7 is integrally formed from the inner wall of the main shaft 8 towards the center; in another embodiment, the large-diameter inner gear ring 7 is fixed to the inner wall of the main shaft 8 as an independent component through a connecting structure. The large-diameter outer drum-shaped gear ring 1 and the large-diameter inner gear ring 7 mesh with each other, thereby forming a large-diameter drum-shaped gear compensation pair near the side of the main shaft 8.

[0037] The transition connection structure is disposed between the large-diameter drum-shaped toothed connecting unit and the elastic compensation connecting unit. In this embodiment, the transition connection structure is a flange 2. The flange 2 is connected to the large-diameter outer drum-shaped toothed ring 1 and the elastic compensation connecting unit respectively. The flange 2 is provided with a flange stop 21, a connecting hole 22 for connecting the flange 2 and the large-diameter outer drum-shaped toothed ring 1, and a connecting hole 23 for connecting the flange 2 and the elastic compensation connecting unit.

[0038] The elastic compensation connection unit is disposed between the flange 2 and the reducing bearing structure. In this embodiment, the elastic compensation connection unit is a metal diaphragm coupling 3. The metal diaphragm coupling 3 is connected between the flange 2 and the reducing bearing structure, and may be provided with a metal diaphragm coupling stop 31, a connection hole 32 for connecting with the flange 2, and a fastening hole 33 for connecting the metal diaphragm to the coupling disc.

[0039] The differential bearing structure is disposed between the elastic compensation connection unit and the small-diameter drum-shaped tooth connection unit. In this embodiment, the differential bearing structure is a tapered frame 4. The tapered frame 4 has a structure that gradually narrows from the large-diameter end near the main shaft 8 to the small-diameter end near the planetary carrier 9. The large end of the tapered frame 4 is connected to the metal diaphragm coupling 3, and the small end is integrally formed or fixedly connected to the small-diameter internal gear ring 6; the tapered frame 4 may also be provided with a stop 41 and a connecting hole 42 that cooperate with the metal diaphragm coupling 3.

[0040] The small-diameter drum-shaped gear coupling unit includes a small-diameter outer drum-shaped gear ring 5 and a small-diameter inner gear ring 6. The small-diameter outer drum-shaped gear ring 5 and the small-diameter inner gear ring 6 mesh with each other, thereby forming a small-diameter drum-shaped gear compensation pair near the planet carrier 9. The small-diameter drum-shaped gear coupling unit is connected to the planet carrier 9 to form a torque transmission path from the main shaft 8 to the planet carrier 9.

[0041] In this embodiment, at least a portion of the small-diameter drum-shaped tooth connecting unit, the differential bearing structure, and the elastic compensation connecting unit are located within the radial envelope of the large-diameter drum-shaped tooth connecting unit, thereby forming a radially nested arrangement; at the same time, at least a portion of the large-diameter drum-shaped tooth connecting unit is arranged within the rear end cavity or envelope space of the main shaft 8.

[0042] In this embodiment, the torque is input from the main shaft 8 and transmitted to the planetary carrier 9 via the large-diameter internal gear ring 7, the large-diameter external convex gear ring 1, the flange 2, the metal diaphragm coupling 3, the tapered frame 4, the small-diameter internal gear ring 6, and the small-diameter external convex gear ring 5.

[0043] Another key feature of this embodiment is that its compensation mechanism is not accomplished independently by a single component, but rather by a hierarchical, series-connected composite compensation method. For example... Figure 7 As shown, this composite compensation method includes two levels: spatial pose compensation of the drum-shaped teeth and elastic compensation of the elastic element, which are connected sequentially. Figure 8 A simplified diagram is given showing how the central elastic compensation connection unit continues to absorb the remaining misalignment when the drum-shaped tooth pair is stuck.

[0044] The first level is the spatial orientation compensation of the drum-shaped teeth. When there are installation errors, manufacturing errors, operational deflection, housing deformation, or compound misalignment between the spindle 8 and the planetary carrier 9, the large-diameter drum-shaped tooth compensation pair and the small-diameter drum-shaped tooth compensation pair adapt to the angular deviation and radial offset by changing the tooth surface curvature and meshing spatial relationship, respectively.

[0045] The second level is elastic compensation by elastic elements. When the misalignment angle continues to increase, the large-diameter drum tooth 10 and the small-diameter drum tooth 11 jam, and the metal diaphragm coupling 3 located in the middle deforms elastically to release the remaining angular deviation, radial offset, axial displacement, thermal expansion error and non-torque additional load that were not completely absorbed by the drum tooth pairs on both sides.

[0046] Example 2: Configuration of large-diameter internal gear ring connected to planetary carrier like Figure 4 As shown, this embodiment has the same basic concept as Embodiment 1, except that: the large-diameter drum-shaped tooth connecting unit is arranged on the side close to the planet carrier 9, and the large-diameter internal tooth ring 7 is integrally formed or fixedly connected to the planet carrier 9; the small-diameter drum-shaped tooth connecting unit is arranged on the side close to the spindle 8 and connected to the spindle 8.

[0047] The composite compensating coupling in this embodiment also includes a large-diameter drum-shaped tooth connecting unit, a transition connection structure, an elastic compensating connecting unit 3, a differential bearing structure, and a small-diameter drum-shaped tooth connecting unit. The specific structural forms of the central elastic compensating connecting unit 3, the differential bearing structure, and the drum-shaped tooth compensating pairs on both sides can be set as in Embodiment 1.

[0048] In this embodiment, the torque is input from the main shaft 8 and transmitted to the planetary carrier 9 via the small-diameter drum-shaped tooth connecting unit, the differential bearing structure, the elastic compensation connecting unit 3, the transition connecting structure, and the large-diameter drum-shaped tooth connecting unit. Its composite compensation relationship is the same as in Embodiment 1, that is, the drum-shaped tooth compensation pairs on both sides undertake spatial orientation adaptation, and the elastic compensation connecting unit in the middle undertakes further elastic release.

[0049] Example 3: Alternative Form of Flexible Compensation Connection Unit In the above embodiments, the elastic compensation connection unit uses a metal diaphragm coupling 3 as an exemplary structure, but the present invention is not limited thereto. Depending on different capacity levels, torque levels, space constraints, and compensation requirements, the elastic compensation connection unit can also employ bellows couplings, thin-walled elastic cylindrical shell couplings, flexible leaf spring couplings, or other elastic element couplings capable of transmitting torque while adapting to relative displacement. Different forms of elastic compensation connection units can be combined with two-sided drum-tooth connection units and differential bearing structures to achieve the composite compensation connection described in this invention.

[0050] Other notes Those skilled in the art will understand that, without departing from the inventive concept, the tooth profile parameters, tooth width, drum length, number of teeth, module, connecting flange type, specific form of the elastic compensation connecting unit, and specific configuration of the differential bearing structure of the large-diameter drum-shaped tooth connecting unit and the small-diameter drum-shaped tooth connecting unit can all be adjusted according to actual working conditions. The connection method between the large-diameter internal gear ring and the main shaft or planetary carrier, and between the small-diameter drum-shaped tooth connecting unit and the main shaft or planetary carrier, can also be achieved through integral forming, interference fit, key connection, spline connection, bolt connection, or other equivalent connection methods, depending on assembly and load-bearing requirements. Any equivalent substitutions or conventional modifications made to the above-mentioned structural forms, connection relationships, and component arrangements using the inventive concept should fall within the protection scope of this invention.

Claims

1. A radially nested composite compensating coupling for connecting a wind turbine main shaft and a planetary carrier, characterized in that, It includes a large-diameter drum-shaped tooth connection unit, a transition connection structure, an elastic compensation connection unit, a different diameter bearing structure, and a small-diameter drum-shaped tooth connection unit connected sequentially along the force transmission path; The large-diameter drum-shaped tooth connecting unit includes a large-diameter outer drum-shaped tooth ring and a large-diameter inner tooth ring that mesh with each other; the small-diameter drum-shaped tooth connecting unit includes a small-diameter outer drum-shaped tooth ring and a small-diameter inner tooth ring that mesh with each other. The large-diameter drum-shaped tooth connecting unit and the small-diameter drum-shaped tooth connecting unit are respectively connected to one of the main shaft and the planet carrier to form a torque transmission path between the main shaft and the planet carrier; The transition connection structure is connected between the large-diameter drum-shaped tooth connection unit and the elastic compensation connection unit, and the differential bearing structure is connected between the elastic compensation connection unit and the small-diameter drum-shaped tooth connection unit. The differential bearing structure as a whole has a structure that gradually narrows from the large-diameter end to the small-diameter end. At least a portion of the small-diameter drum-shaped tooth connecting unit, the differential bearing structure, and the elastic compensation connecting unit are located within the radial envelope of the large-diameter drum-shaped tooth connecting unit; The large-diameter drum-shaped tooth connecting unit and the small-diameter drum-shaped tooth connecting unit respectively constitute drum-shaped tooth compensation pairs located at both ends of the coupling, and the elastic compensation connecting unit is disposed between the two drum-shaped tooth connecting units.

2. The radially nested composite compensating coupling according to claim 1, characterized in that, The transition connection structure is a flange, which is connected to the large-diameter outer bulging toothed ring and the elastic compensation connection unit respectively.

3. The radially nested composite compensating coupling according to claim 2, characterized in that, The flange is provided with a flange stop, a connecting hole for connecting the flange and a large-diameter outer bulging toothed ring, and a connecting hole for connecting the flange and an elastic compensation connection unit.

4. The radially nested composite compensating coupling according to claim 1, characterized in that, The differential bearing structure is a tapered skeleton. The large end of the tapered skeleton is connected to the elastic compensation connection unit, and the small end of the tapered skeleton is integrally formed or fixedly connected to the small-diameter internal gear ring.

5. The radially nested composite compensating coupling according to claim 4, characterized in that, The conical frame is provided with a stop that mates with the elastic compensation connection unit and a connection hole for connecting the conical frame and the elastic compensation connection unit. The conical frame is a hollow conical shell structure, a conical cylinder structure, or a conical support structure with reinforcing ribs.

6. The radially nested composite compensating coupling according to claim 1, characterized in that, The elastic compensation connection unit is an elastic element coupling, which can be any one of a metal diaphragm coupling, a bellows coupling, a thin-walled elastic cylindrical shell coupling, or a flexible leaf spring coupling; when the elastic element coupling is a metal diaphragm coupling, the metal diaphragm coupling can be a single diaphragm structure, a double diaphragm structure, or a multi-layer stacked structure.

7. The radially nested composite compensating coupling according to claim 1, characterized in that, The large-diameter outer convex toothed ring and the large-diameter inner toothed ring form a large-diameter convex toothed compensation pair near the large-diameter end, and the small-diameter outer convex toothed ring and the small-diameter inner toothed ring form a small-diameter convex toothed compensation pair near the small-diameter end. The pitch circle diameter of the large-diameter convex toothed connecting unit is larger than the pitch circle diameter of the small-diameter convex toothed connecting unit.

8. The radially nested composite compensating coupling according to claim 1, characterized in that, The large-diameter internal gear ring is connected to the main shaft, and the small-diameter drum-shaped gear connecting unit is connected to the planetary carrier; the large-diameter internal gear ring is disposed at the rear end of the main shaft and is integrally formed from the inner wall of the main shaft towards the center, or is fixed to the inner wall of the main shaft by a connecting structure; the large-diameter drum-shaped gear connecting unit is at least partially arranged in the inner cavity or envelope space of the rear end of the main shaft.

9. The radially nested composite compensating coupling according to claim 1, characterized in that, The large-diameter internal gear ring is connected to the planet carrier, and the small-diameter drum-shaped gear connecting unit is connected to the main shaft; the large-diameter internal gear ring is located at one end of the planet carrier near the main shaft and is integrally formed from the inner wall of the planet carrier towards the center, or is fixed to the inner wall of the planet carrier through a connecting structure.

10. The large-diameter drum-shaped toothed connecting unit is at least partially arranged in the inner cavity or envelope space of the corresponding end of the planet carrier. The radially nested composite compensating coupling according to claim 2, 4 or 8 is characterized in that, The connection between the flange and the large-diameter outer bulging toothed ring, the flange and the elastic compensation connection unit, and the differential bearing structure and the elastic compensation connection unit all adopt a combination of stop positioning and bolt connection.

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