Planetary gear assemblies, gearboxes and wind turbines

Abstract

This application discloses a planetary gear assembly, a gearbox, and a wind turbine. The planetary gear assembly includes a planet carrier, a sun gear, and a stop. The planet carrier has an external spline and a mounting groove on its outer circumferential surface, with the external spline and mounting groove arranged axially along the planet carrier. The sun gear is fitted onto the outer circumferential surface of the planet carrier, and has an internal spline on its inner circumferential surface, which meshes with the external spline. The stop is detachably located at one end of the sun gear and has a protrusion protruding towards the axis of the planet carrier and beyond the inner circumferential surface of the sun gear. The protrusion is located within the mounting groove, which restricts the stop's axial movement along the planet carrier. The technical solution provided by this application allows for the design width of the internal spline to be unrestricted, fully utilizing available space to optimize the internal spline dimensions and improve load-bearing capacity.

Description

Technical Field

[0001] This application relates to the field of planetary gear technology, and in particular to a planetary gear assembly, gearbox, and wind turbine. Background Technology

[0002] In multi-stage planetary transmission systems, power transmission between planetary transmission units at each stage is mainly accomplished through the splined connection between the sun gear and the planet carrier. Among them, the connection structure between the internal splined sun gear and the external splined planet carrier is widely used in gearbox design due to its transmission stability advantage.

[0003] In the prior art, the connection between the internal spline sun gear and the external spline planetary carrier is generally achieved by using the inner hole shoulder of the sun gear and the stop of the planetary carrier to achieve axial positioning. However, machining the shoulder on the sun gear requires reserving the relief groove and shoulder space, which reduces the design width of the internal spline and makes it difficult to optimize to the best meshing position, affecting the load sharing effect and easily causing local stress concentration. Utility Model Content

[0004] The purpose of this application is to provide a planetary gear assembly, gearbox, and wind turbine generator that makes the design width of the internal spline no longer restricted, can make full use of the available space to optimize the internal spline size, and improve the load-bearing capacity.

[0005] In a first aspect, this utility model provides a planetary gear assembly, comprising:

[0006] The planetary carrier has an external spline and a mounting groove on its outer peripheral surface, and the external spline and the mounting groove are arranged along the axial direction of the planetary carrier.

[0007] A sun gear is fitted onto the outer circumferential surface of the planet carrier. An internal spline is provided on the inner circumferential surface of the sun gear, and the internal spline engages with the external spline.

[0008] A stop member is detachably disposed at one end of the sun gear. The stop member has a protrusion that protrudes toward the axis of the planet carrier and protrudes beyond the inner circumferential surface of the sun gear. The protrusion is disposed in the mounting groove, which is used to restrict the axial movement of the stop member along the planet carrier.

[0009] Beneficial effects: This planetary gear assembly mounts the sun gear onto the planet carrier, and achieves efficient torque transmission through the meshing of the internal splines of the sun gear and the external splines of the planet carrier. At the same time, a detachable stop is installed at the end of the sun gear. The protrusion of the stop is embedded in the mounting groove of the planet carrier. The axial limiting effect of the mounting groove on the stop indirectly restricts the axial movement of the sun gear along the planet carrier, thereby simultaneously achieving the functions of torque transmission and axial positioning.

[0010] By setting a detachable stop at the end of the sun gear, there is no need to machine traditional shoulders and matching relief grooves on the sun gear. This eliminates the space occupied by shoulders and relief grooves in the inner hole of the sun gear, making the design width of the internal spline no longer restricted. It can make full use of the available space to optimize the size of the internal spline and improve the load-bearing capacity. At the same time, the axial position of the internal spline can be flexibly adjusted to the optimal meshing point, improving the load-sharing effect of the internal spline and external spline meshing, reducing local stress concentration, and improving the overall performance and reliability of the planetary gear assembly.

[0011] In addition, the independent stop design avoids spatial conflicts between the shoulder, relief groove and internal spline. Especially for large module and multi-tooth splines, it can be compatible with efficient and economical milling processes (which require a wider relief groove). Within the limited gear width, there is no need to compromise on the balance of various structural dimensions, reducing the machining difficulty and taking into account both design rationality and production economy.

[0012] In one alternative embodiment, an axial gap is provided between the outer wall of the protrusion and the wall of the mounting groove along the axial direction of the planetary carrier.

[0013] Beneficial effects: The axial clearance between the outer wall of the protrusion and the wall of the mounting groove provides limited axial movement space for the sun gear. When the sun gear tends to move axially due to changes in operating conditions (such as load fluctuations, vibration and impact), the protrusion can move slightly within the axial clearance range of the mounting groove, thereby buffering and releasing the instantaneous stress. This avoids the problem of stress directly acting on the tooth surface or connecting structure in traditional rigid positioning, reducing the risk of tooth surface wear and spline deformation caused by stress concentration, thus effectively ensuring the service life of the sun gear and planet gears.

[0014] In one alternative embodiment, the stop is detachably disposed at one end of the sun gear by means of a fastener.

[0015] Beneficial effects: The stop is detachably connected to one end of the sun gear via fasteners. During component assembly, the sun gear and planet carrier can be precisely splined to ensure the accuracy of the spline engagement position. Then, the stop is installed via fasteners to achieve axial positioning, avoiding assembly interference problems that may be caused by traditional one-piece shoulders, simplifying the assembly process and improving assembly efficiency.

[0016] In one optional embodiment, the stop member has a plurality of first mounting holes, and the end of the sun gear has a plurality of first connecting holes. The first connecting holes are provided in a one-to-one correspondence with the first mounting holes. The fastener passes through the first mounting holes and connects to the corresponding first connecting holes, so that the stop member is detachably provided at one end of the sun gear.

[0017] Beneficial effects: The multiple first mounting holes on the stop and the multiple first connecting holes at the end of the sun gear correspond one-to-one. When the fastener passes through the first mounting hole and connects with the first connecting hole, the preload can be evenly distributed on the contact surface between the stop and the sun gear, avoiding deformation caused by excessive local stress, and significantly improving the stability of the overall connection structure. It is especially suitable for working conditions that transmit large torque.

[0018] In one alternative embodiment, the stop member is annular and is integrally formed.

[0019] Beneficial effects: The ring-shaped stop is made in one piece, which avoids the weak points caused by splicing in the split structure. It makes the overall force of the stop more even and less likely to deform or break when bearing the axial force transmitted by the sun gear. It significantly improves the structural strength and rigidity of the stop and ensures the stable performance of the axial limiting function.

[0020] In one alternative embodiment, the planetary gear assembly further includes a limiting plate, which is detachably mounted on the planet carrier;

[0021] The planetary carrier is provided with a stepped groove. Along the axial direction of the planetary carrier, the stepped surface of the stepped groove is spaced apart from the limiting plate, so that the mounting groove is formed between the stepped surface of the stepped groove and the limiting plate.

[0022] Beneficial effects: The mounting groove is formed by the detachable limiting plate and the stepped surface of the planetary carrier. Limiting plates of different thicknesses can be replaced according to the dimensions of the protrusion (such as thickness and height), flexibly adjusting the axial width of the mounting groove. No modification to the planetary carrier body is required, allowing for the adaptation to various specifications of stop components, enhancing the versatility and compatibility of the assembly.

[0023] In one optional embodiment, the limiting plate is provided with a plurality of second mounting holes, and the planetary carrier is provided with a plurality of second connecting holes. The second connecting holes are provided in a one-to-one correspondence with the second mounting holes. A connector passes through the second mounting holes and connects to the corresponding second connecting holes, so that the limiting plate is detachably mounted on the planetary carrier.

[0024] Beneficial effects: Multiple second mounting holes correspond one-to-one with the second connecting holes, and are connected by connectors to stably fix the limiting plate on the planetary carrier. This can evenly distribute the axial force on the limiting plate, avoid loosening or falling off due to excessive force on a single connection point, and ensure the structural stability of the mounting groove.

[0025] In one optional embodiment, the mounting groove is a recess, the recess having a first inner wall and a second inner wall disposed opposite to each other, and the protrusion being disposed between the first inner wall and the second inner wall.

[0026] Beneficial effect: The first and second inner walls of the groove constrain the protrusion from two axial directions. When the sun gear or planet carrier moves axially, the protrusion will be blocked by one of the inner walls, thus limiting the relative axial displacement of the two.

[0027] In one optional embodiment, the stop member includes a plurality of pressure plates arranged circumferentially around the planet carrier. Each pressure plate has a plurality of first mounting holes, and the end of the sun gear has a plurality of first connecting holes. The first connecting holes correspond one-to-one with the first mounting holes. The fastener passes through the first mounting holes and connects to the corresponding first connecting holes, so that the pressure plate is detachably located at one end of the sun gear.

[0028] Beneficial effects: The stop component consists of multiple pressure plates arranged circumferentially around the planetary carrier. Compared to a monolithic ring structure, this reduces material usage, especially in large-size planetary gear assemblies. It significantly reduces the overall mass of the stop component, thereby reducing rotational inertia, improving the dynamic response speed of the assembly, and reducing drive energy consumption. Furthermore, the multiple independent pressure plates can be installed or removed individually. In scenarios where space around the planetary carrier is limited (e.g., where other components may interfere), it can be installed piece by piece, avoiding obstacles, without requiring overall alignment. This greatly reduces space constraints during assembly, making it particularly suitable for compact transmission systems.

[0029] In one optional embodiment, the sun gear is further provided with a lifting hole, which is located at opposite ends of the sun gear, along with the first connecting hole.

[0030] Beneficial effects: By creating lifting holes on the sun gear, the handling and installation of the sun gear are facilitated. The lifting holes and the first connecting hole are located at opposite ends of the sun gear, completely separating the lifting operations of the sun gear (such as lifting during installation and handling) from the connection operations of the stop components. During lifting, there is no need to avoid installed pressure plates or fasteners, and when connecting the pressure plates, there is no need to disassemble the lifting tools. The two operations do not interfere with each other, reducing process conflicts during assembly and significantly improving assembly efficiency.

[0031] Secondly, this utility model also provides a gearbox, including a planetary gear assembly.

[0032] Beneficial effects: This gearbox, because it includes a planetary gear assembly, has the same effects as a planetary gear assembly, which will not be elaborated further here.

[0033] Thirdly, this utility model also provides a wind turbine generator, including...

[0034] Cabin canopy;

[0035] A gearbox, which is located inside the engine room housing.

[0036] Beneficial effects: This wind turbine, because it includes a planetary gear assembly, has the same effects as a planetary gear assembly, which will not be elaborated further here. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a structural cross-sectional view of a planetary gear assembly in one embodiment provided in this application;

[0039] Figure 2 This is a partial cross-sectional view of a planetary gear assembly in one embodiment provided in this application;

[0040] Figure 3 yes Figure 2 Enlarged view of the mounting slot in the middle;

[0041] Figure 4 This is a structural cross-sectional view of the planetary gear assembly in another embodiment provided in this application;

[0042] Figure 5 This is a partial cross-sectional view of a planetary gear assembly in another embodiment provided in this application;

[0043] Figure 6 yes Figure 5 Enlarged view of the mounting slot in the middle;

[0044] Figure 7 yes Figure 4 A schematic diagram of the stop stop component.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Planetary carrier; 110. External spline; 120. Mounting slot; 130. Stepped groove; 131. Stepped surface; 140. Second connecting hole; 150. Groove; 151. First inner wall; 152. Second inner wall;

[0047] 200, Sun gear; 210, Internal spline; 220, First connecting hole; 230, Lifting hole;

[0048] 300, Stop; 310, Protrusion; 320, Axial clearance; 330, First mounting hole; 340, Pressure plate;

[0049] 400. Fasteners;

[0050] 500, Limiting plate; 510, Second mounting hole;

[0051] 600. Connectors. Detailed Implementation

[0052] In related technologies, the connection between the internal spline sun gear and the external spline planetary carrier is generally achieved by using the inner hole shoulder of the sun gear and the stop of the planetary carrier to achieve axial positioning. However, machining the shoulder on the sun gear requires reserving the relief groove and shoulder space, which reduces the design width of the internal spline and makes it difficult to optimize to the best meshing position, affecting the load sharing effect and easily causing local stress concentration.

[0053] In the early stages of the development of this application, in order to eliminate the space occupied by the shoulder and relief groove in the internal spline in the traditional structure, the team tried to adjust the machining sequence of the sun gear: prioritize machining the internal spline to ensure its width dimension, and then machine the shoulder at the end. This approach did indeed free the internal spline from the limitation of the shoulder position, ensure the design width, and create conditions for improving the load-bearing capacity of the spline.

[0054] However, this solution has significant limitations: the shoulder and the relief groove still need to occupy axial space, which forces the overall size of the sun gear to increase. This not only conflicts with the design trend of lightweight and compact gearboxes, but may also cause spatial interference with surrounding components and increase the cost of housing modification. Therefore, it failed to become the final solution.

[0055] Based on this, the inventors of this application redesigned the planetary gear assembly by mounting the sun gear on the planet carrier. The internal spline of the sun gear meshes with the external spline of the planet carrier to achieve efficient torque transmission. At the same time, a detachable stop is installed at the end of the sun gear. The protrusion of the stop is embedded in the mounting groove of the planet carrier. The axial limiting effect of the mounting groove on the stop indirectly restricts the axial movement of the sun gear along the planet carrier, thereby simultaneously achieving torque transmission and axial positioning functions.

[0056] By setting a detachable stop at the end of the sun gear, there is no need to machine traditional shoulders and matching relief grooves on the sun gear. This eliminates the space occupied by shoulders and relief grooves in the inner hole of the sun gear, making the design width of the internal spline no longer restricted. It can make full use of the available space to optimize the size of the internal spline and improve the load-bearing capacity. At the same time, the axial position of the internal spline can be flexibly adjusted to the optimal meshing point, improving the load-sharing effect of the internal spline and external spline meshing, reducing local stress concentration, and improving the overall performance and reliability of the planetary gear assembly.

[0057] In addition, the independent stop design avoids spatial conflicts between the shoulder, relief groove and internal spline. Especially for large module and multi-tooth splines, it can be compatible with efficient and economical milling processes (which require a wider relief groove). Within the limited gear width, there is no need to compromise on the balance of various structural dimensions, reducing the machining difficulty and taking into account both design rationality and production economy.

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0059] The following is combined Figures 1 to 7 The following describes embodiments of the present invention.

[0060] According to embodiments of the present invention, on the one hand, such as Figures 1 to 7 As shown, a planetary gear assembly is provided, including a planet carrier 100, a sun gear 200, and a stop 300.

[0061] Specifically, such as Figures 1 to 5 As shown, the planetary carrier 100 has an external spline 110 and a mounting groove 120 on its outer peripheral surface. The external spline 110 and the mounting groove 120 are arranged along the axial direction of the planetary carrier 100.

[0062] Specifically, such as Figures 1 to 5 As shown, the sun gear 200 is fitted on the outer circumferential surface of the planet carrier 100, and the inner circumferential surface of the sun gear 200 is provided with an inner spline 210, which meshes with the outer spline 110 of the planet carrier 100.

[0063] Specifically, such as Figures 1 to 5 As shown, a stop member 300 is detachably disposed at one end of the sun gear 200. The stop member 300 has a protrusion 310 that protrudes from the inner circumferential surface of the sun gear 200 and protrudes toward the axis of the planet carrier 100. The protrusion 310 is disposed within a mounting groove 120, which restricts the axial movement of the stop member 300 along the planet carrier 100.

[0064] This planetary gear assembly mounts a sun gear 200 onto a planet carrier 100. The internal spline 210 of the sun gear 200 meshes with the external spline 110 of the planet carrier 100 to achieve efficient torque transmission. Simultaneously, a detachable stop 300 is installed at the end of the sun gear 200. The protrusion 310 of the stop 300 is embedded in the mounting groove 120 of the planet carrier 100. The axial limiting effect of the mounting groove 120 on the stop 300 indirectly restricts the axial movement of the sun gear 200 along the planet carrier 100, thereby simultaneously achieving torque transmission and axial positioning functions.

[0065] By setting a detachable stop 300 at the end of the sun gear 200, there is no need to machine traditional shoulders and matching relief grooves on the sun gear 200. This eliminates the space occupied by shoulders and relief grooves in the inner hole of the sun gear 200, so that the design width of the inner spline 210 is no longer restricted. The effective space can be fully utilized to optimize the size of the inner spline 210 and improve the load-bearing capacity. At the same time, the axial position of the inner spline 210 can be flexibly adjusted to the optimal meshing point, improving the load-sharing effect of the meshing between the inner spline 210 and the outer spline 110, reducing local stress concentration, and improving the overall performance and reliability of the planetary gear assembly.

[0066] In addition, the independent stop 300 design avoids spatial conflicts between the shoulder, the relief groove and the internal spline 210. Especially for large module and multi-tooth splines, it can be compatible with efficient and economical milling processes (which require a wider relief groove). Within the limited gear width, there is no need to compromise on the balance of various structural dimensions, reducing the machining difficulty and taking into account both design rationality and production economy.

[0067] Specifically, the external spline 110 and the mounting groove 120 can be spaced apart or sequentially fitted together. In this embodiment, there are no specific restrictions on the arrangement of the external spline 110 and the mounting groove 120.

[0068] Specifically, the mounting groove 120 can be configured as an annular groove, a rectangular groove, a stepped groove 130, a T-shaped groove, etc. In this embodiment, the type of mounting groove 120 is not specifically limited.

[0069] Specifically, multiple internal splines 210 and external splines 110 can be provided. In this embodiment, the number of internal splines 210 and external splines 110 is not limited. Furthermore, internal splines 210 and external splines 110 can be rectangular splines, involute splines, etc. In this embodiment, the structure of internal splines 210 and external splines 110 is not specifically limited.

[0070] Specifically, the stop 300 and the sun gear 200 can be detachably connected by bolt connection, snap-fit ​​connection or other connection methods. In this embodiment, no specific restrictions are placed on the detachable connection method.

[0071] Specifically, the protrusion 310 can be configured as an annular protrusion structure, a segmented protrusion structure, or a stepped protrusion structure. In this embodiment, the structure of the protrusion 310 is not specifically limited.

[0072] In one embodiment, such as Figure 3 and Figure 6 As shown, along the axial direction of the planetary carrier 100, there is an axial gap 320 between the outer wall of the protrusion 310 and the groove wall of the mounting groove 120.

[0073] The axial clearance 320 between the outer wall of the protrusion 310 and the wall of the mounting groove 120 provides a limited axial movement space for the sun gear 200. When the sun gear 200 tends to move axially due to changes in working conditions (such as load fluctuations, vibration and impact), the protrusion 310 can move slightly within the axial clearance 320 of the mounting groove 120. This buffers and releases the instantaneous stress, avoiding the problem of stress directly acting on the tooth surface or connecting structure in traditional rigid positioning. It also reduces the risk of tooth surface wear and spline deformation caused by stress concentration, thereby effectively ensuring the service life of the sun gear 200 and planet gears.

[0074] Specifically, the reasonable range of the axial clearance 320 needs to be determined comprehensively based on the specific application scenario, material properties and operating parameters of the planetary gear assembly. In this embodiment, the range of the axial clearance 320 is not specifically limited.

[0075] In one embodiment, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the stop 300 is detachably mounted on one end of the sun gear 200 by fastener 400.

[0076] The stop 300 is detachably connected to one end of the sun gear 200 via fasteners 400. During component assembly, the sun gear 200 and the planet carrier 100 can be precisely splined to ensure the accuracy of the spline engagement position. Then, the stop 300 is installed via fasteners 400 to achieve axial positioning, avoiding assembly interference problems that may be caused by traditional one-piece shoulders, simplifying the assembly process and improving assembly efficiency.

[0077] When the stop part 300 suffers wear, deformation or other damage after long-term use, it can be replaced individually without disassembling the sun gear 200 or the entire assembly. This greatly reduces maintenance difficulty and cost, while also reducing downtime caused by maintenance.

[0078] In addition, the fastener 400 can ensure a tight fit between the stop 300 and the sun gear 200 through pre-tightening force, preventing loosening due to vibration during transmission and ensuring the stability of axial positioning.

[0079] Specifically, the fastener 400 can be selected from bolts, screws, nuts, etc. In this embodiment, the type of fastener 400 is not specifically limited.

[0080] In one embodiment, such as Figure 1 and Figure 2As shown, the stop member 300 has a first mounting hole 330, wherein there are multiple first mounting holes 330. The end of the sun gear 200 has multiple first connecting holes 220, and the first connecting holes 220 are configured to correspond one-to-one with the first mounting holes 330. Fasteners 400 pass through the first mounting holes 330 and connect to the corresponding first connecting holes 220, so that the stop member 300 can be detachably mounted on one end of the sun gear 200.

[0081] The multiple first mounting holes 330 on the stop 300 correspond one-to-one with the multiple first connecting holes 220 at the end of the sun gear 200. When the fastener 400 passes through the first mounting hole 330 and connects with the first connecting hole 220, it can evenly distribute the preload on the contact surface between the stop 300 and the sun gear 200, avoid deformation caused by excessive local stress, and significantly improve the stability of the overall connection structure, which is especially suitable for the operation of transmitting large torque.

[0082] The one-to-one correspondence between the first mounting hole 330 and the first connecting hole 220 provides a clear positioning reference for the assembly of the stop 300 and the sun gear 200, which can effectively avoid circumferential deviation or axial misalignment during the installation of the stop 300, and ensure that the protrusion 310 of the stop 300 can be accurately embedded in the mounting groove 120 of the planet carrier 100, thus ensuring the reliable realization of the axial limiting function.

[0083] Specifically, the multiple first mounting holes 330 can be evenly distributed at intervals along the circumference of the stop member 300, or arranged symmetrically. In this embodiment, no specific restrictions are placed on the arrangement of the multiple first mounting holes 330.

[0084] For example, multiple first mounting holes 330 can be evenly spaced along the circumferential direction of the stop 300, with equal included angles between adjacent holes. This arrangement allows the preload of the fastener 400 to be evenly applied to the contact surface between the stop 300 and the sun gear 200, avoiding deformation of the stop 300 caused by local stress concentration and ensuring the stability of the connection structure.

[0085] In one embodiment, such as Figure 1 and Figure 2 As shown, the stop 300 is annular and is integrally formed.

[0086] The annular stop 300 is integrally molded, which avoids the weak points caused by splicing of the split structure. It makes the stop 300 more evenly stressed and less prone to deformation or breakage when bearing the axial force transmitted by the sun gear 200. This significantly improves the structural strength and rigidity of the stop 300 and ensures the stable performance of the axial limiting function.

[0087] Furthermore, the one-piece ring-shaped stop 300 can be manufactured through a single forming process (such as turning or forging), eliminating the need to splice and assemble multiple separate parts, thus reducing processing steps and assembly errors. Simultaneously, the one-piece forming ensures the coaxiality and perpendicularity of the inner circle, outer circle, and end face of the stop 300, guaranteeing the fitting accuracy between the protrusion 310 and the mounting groove 120.

[0088] Furthermore, the integrally molded annular stop 300 is connected to the sun gear 200 as a single component, eliminating the need to position and assemble multiple separate parts before assembly, thus simplifying the assembly process. Operators only need to connect the integral stop 300 to the sun gear 200 using fasteners 400, reducing the operational difficulty and time cost during assembly.

[0089] In one embodiment, such as Figures 1 to 3 As shown, the planetary gear assembly also includes a limiting plate 500, which is detachably mounted on the planet carrier 100. A stepped groove 130 is provided on the planet carrier 100. Along the axial direction of the planet carrier 100, the stepped surface 131 of the stepped groove 130 is spaced apart from the limiting plate 500, forming a mounting groove 120 between the stepped surface 131 of the stepped groove 130 and the limiting plate 500.

[0090] The mounting groove 120 is formed by the detachable limiting plate 500 and the stepped surface 131 of the stepped groove 130 of the planetary carrier 100. The limiting plate 500 of different thicknesses can be replaced according to the size (such as thickness and height) of the protrusion 310, and the axial width of the mounting groove 120 can be flexibly adjusted. Various specifications of stop parts 300 can be adapted without modifying the planetary carrier 100 itself, enhancing the versatility and compatibility of the component.

[0091] The stepped groove 130 and the limiting plate 500 are easy to process. The two are combined to form the mounting groove 120, which avoids the difficult operation of directly processing complex grooves (such as deep grooves and irregular grooves) on the planetary carrier 100, and reduces the processing cost of the planetary carrier 100.

[0092] Specifically, the stepped groove 130 on the planetary carrier 100 can be formed by conventional turning processes, while the limiting plate 500 can be manufactured by simple processes such as stamping or milling.

[0093] Specifically, when the mounting slot 120 wears down due to long-term use (such as deformation of the step surface 131 or damage to the limiting plate 500), the limiting plate 500 can be disassembled and replaced separately without repairing or replacing the planetary carrier 100 body. This reduces the risk of damage to the core component, the planetary carrier 100, significantly extends its service life, and lowers maintenance costs.

[0094] In one embodiment, such as Figure 1 and Figure 2 As shown, the limiting plate 500 has multiple second mounting holes 510, and the planetary carrier 100 has multiple second connecting holes 140, with each second connecting hole 140 corresponding to one of the second mounting holes 510. A connector 600 passes through the second mounting hole 510 and connects to the corresponding second connecting hole 140, allowing the limiting plate 500 to be detachably mounted on the planetary carrier 100.

[0095] Multiple second mounting holes 510 correspond one-to-one with second connecting holes 140 and are connected by connectors 600 to stably fix the limiting plate 500 on the planetary carrier 100. This can evenly distribute the axial force on the limiting plate 500, avoid loosening or falling off due to excessive force on a single connection point, and ensure the structural stability of the mounting groove 120.

[0096] Furthermore, the one-to-one corresponding hole positions provide a clear installation benchmark for the limiting plate 500, effectively controlling the relative position of the limiting plate 500 and the stepped surface 131 of the stepped groove 130, ensuring that the axial width, parallelism, and other parameters of the mounting groove 120 formed by the two meet the design requirements. This lays the foundation for the precise fit of the protrusion 310 and avoids dimensional deviations in the mounting groove 120 caused by the misalignment of the limiting plate 500.

[0097] Specifically, when the limit plate 500 wears out or needs to be replaced with a different specification of limit plate 500 to adjust the size of the mounting slot 120, the operation can be easily completed by disassembling the corresponding connecting piece 600. This eliminates the need for complex machining of the planetary carrier 100, reducing maintenance procedures and time, and lowering equipment downtime costs.

[0098] Specifically, the connector 600 can be a bolt, screw, etc. In this embodiment, the type of connector 600 is not specifically limited.

[0099] In one embodiment, such as Figures 4 to 6 As shown, the mounting groove 120 is a recess 150, which has a first inner wall 151 and a second inner wall 152. The first inner wall 151 and the second inner wall 152 are arranged opposite to each other, and the protrusion 310 is disposed between the first inner wall 151 and the second inner wall 152.

[0100] The first inner wall 151 and the second inner wall 152 of the groove 150 constrain the protrusion 310 from two axial directions respectively. When the sun gear 200 or the planet carrier 100 moves axially, the protrusion 310 will be blocked by one of the inner walls, thereby limiting the relative axial displacement of the two.

[0101] Specifically, the first inner wall 151 and the second inner wall 152 of the groove 150 are planar. When the protrusion 310 contacts the inner wall on one side and transmits axial force, the inner wall of the groove 150 receives the load in the form of surface contact, which can significantly increase the force-bearing area and reduce the pressure per unit area compared with point contact.

[0102] In one embodiment, such as Figures 4 to 7 As shown, the stop member 300 includes multiple pressure plates 340, wherein the multiple pressure plates 340 are arranged circumferentially around the planet carrier 100, and each pressure plate 340 is provided with multiple first mounting holes 330. The end of the sun gear 200 is provided with multiple first connecting holes 220, and the first connecting holes 220 are provided one-to-one with the first mounting holes 330. The pressure plates 340 are detachably mounted on one end of the sun gear 200 by fasteners 400 passing through the first mounting holes 330 and connecting to the corresponding first connecting holes 220.

[0103] The stop component 300 consists of multiple pressure plates 340 arranged circumferentially around the planetary carrier 100. Compared to an integral ring structure, this reduces material usage. Especially in large-size planetary gear assemblies, it significantly reduces the overall mass of the stop component 300, thereby reducing rotational inertia, improving the dynamic response speed of the assembly, and reducing drive energy consumption. Furthermore, the multiple independent pressure plates 340 can be installed or removed individually. In scenarios where the space around the planetary carrier 100 is limited (such as when other components interfere), they can be installed piece by piece, avoiding obstacles, without the need for overall alignment. This greatly reduces space constraints during assembly, making it particularly suitable for compact transmission systems.

[0104] When individual pressure plates 340 show wear or deformation due to long-term use, only the damaged pressure plate 340 can be removed and replaced, without replacing the entire stop part 300. This reduces spare parts consumption and maintenance workload, and lowers maintenance costs and downtime.

[0105] Specifically, the stop member 300 may be provided with two pressure plates 340, three pressure plates 340, four pressure plates 340, etc. In this embodiment of the application, the number of pressure plates 340 is not specifically limited.

[0106] For example, the stop 300 is provided with two pressure plates 340, each pressure plate 340 being semi-circular, and the two pressure plates 340 are arranged around the planet carrier 100 circumferentially.

[0107] In one embodiment, such as Figure 2 As shown, the sun gear 200 is also provided with a lifting hole 230, which is located at the opposite ends of the sun gear 200, along with the first connecting hole 220.

[0108] By providing a lifting hole 230 on the sun gear 200, the handling and installation of the sun gear 200 are facilitated. The lifting hole 230 and the first connecting hole 220 are respectively located at opposite ends of the sun gear 200, completely separating the lifting operation of the sun gear 200 (such as lifting during installation and handling) from the connection operation of the stop member 300 in space. During lifting, there is no need to avoid the already installed pressure plate 340 or fasteners 400, and when connecting the pressure plate 340, there is no need to disassemble the lifting tools. The two operations do not interfere with each other, reducing process conflicts during assembly and significantly improving assembly efficiency.

[0109] According to an embodiment of the present invention, another aspect provides a gearbox including a planetary gear assembly.

[0110] This gearbox, since it includes a planetary gear assembly, has the same effect as a planetary gear assembly, and will not be described further here.

[0111] Specifically, the gearbox can be used in wind turbine gearboxes, construction machinery gearboxes (such as excavators and cranes), machine tool spindle gearboxes, etc. In this embodiment, no specific restrictions are placed on the application scenarios of the gearbox.

[0112] According to an embodiment of the present invention, another aspect provides a wind turbine generator, including a nacelle cover (not shown) and a gearbox.

[0113] This wind turbine, since it includes a planetary gear assembly, has the same effect as a planetary gear assembly, and will not be described further here.

[0114] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0115] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0116] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0117] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A planetary gear assembly, characterized in that, include: The planetary carrier (100) has an external spline (110) and a mounting groove (120) on its outer peripheral surface, and the external spline (110) and the mounting groove (120) are arranged along the axial direction of the planetary carrier (100); A sun gear (200) is fitted on the outer circumferential surface of the planet carrier (100). An inner spline (210) is provided on the inner circumferential surface of the sun gear (200), and the inner spline (210) meshes with the outer spline (110). A stop (300) is detachably disposed at one end of the sun gear (200). The stop (300) has a protrusion (310) that protrudes toward the axis of the planet carrier (100) and protrudes beyond the inner circumferential surface of the sun gear (200). The protrusion (310) is disposed in the mounting groove (120), which is used to restrict the stop (300) from moving axially along the planet carrier (100).

2. The planetary gear assembly according to claim 1, characterized in that, Along the axial direction of the planetary carrier (100), there is an axial gap (320) between the outer wall of the protrusion (310) and the groove wall of the mounting groove (120).

3. The planetary gear assembly according to claim 2, characterized in that, The stop (300) is detachably provided at one end of the sun gear (200) by means of a fastener (400).

4. The planetary gear assembly according to claim 3, characterized in that, The stop member (300) has a plurality of first mounting holes (330), and the end of the sun gear (200) has a plurality of first connecting holes (220). The first connecting holes (220) are provided in a one-to-one correspondence with the first mounting holes (330). The fastener (400) passes through the first mounting hole (330) and connects to the corresponding first connecting hole (220), so that the stop member (300) is detachably provided at one end of the sun gear (200).

5. The planetary gear assembly according to claim 4, characterized in that, The stop (300) is annular and is integrally formed.

6. The planetary gear assembly according to claim 5, characterized in that, The planetary gear assembly also includes a limiting plate (500), which is detachably mounted on the planet carrier (100). The planetary carrier (100) is provided with a stepped groove (130). Along the axial direction of the planetary carrier (100), the stepped surface (131) of the stepped groove (130) is spaced apart from the limiting plate (500), so that the mounting groove (120) is formed between the stepped surface (131) of the stepped groove (130) and the limiting plate (500).

7. The planetary gear assembly according to claim 6, characterized in that, The limiting plate (500) has a plurality of second mounting holes (510), and the planetary carrier (100) has a plurality of second connecting holes (140). The second connecting holes (140) are arranged one-to-one with the second mounting holes (510). A connector (600) passes through the second mounting hole (510) and connects to the corresponding second connecting hole (140), so that the limiting plate (500) is detachably mounted on the planetary carrier (100).

8. The planetary gear assembly according to claim 3, characterized in that, The mounting groove (120) is a recess (150), which has a first inner wall (151) and a second inner wall (152) disposed opposite to each other, and the protrusion (310) is disposed between the first inner wall (151) and the second inner wall (152).

9. The planetary gear assembly according to claim 8, characterized in that, The stop member (300) includes multiple pressure plates (340), which are arranged circumferentially around the planet carrier (100). Each pressure plate (340) has multiple first mounting holes (330). The end of the sun gear (200) has multiple first connecting holes (220), which correspond one-to-one with the first mounting holes (330). The fastener (400) passes through the first mounting hole (330) and connects to the corresponding first connecting hole (220), so that the pressure plate (340) is detachably located at one end of the sun gear (200).

10. The planetary gear assembly according to any one of claims 4 to 7, characterized in that, The sun gear (200) is also provided with a lifting hole (230), which is located at the opposite ends of the sun gear (200) and the first connecting hole (220).

11. A gearbox, characterized in that, include: The planetary gear assembly according to any one of claims 1 to 10.

12. A wind turbine generator, characterized in that, include: Cabin canopy; The gearbox of claim 11, wherein the gearbox is disposed within the engine compartment cover.

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