Transmission device and application thereof in speed adjusting equipment

Abstract

The invention belongs to the technical field of transmission devices, and particularly relates to a transmission device and application thereof in speed adjusting equipment. The device comprises a shell and a transmission assembly. The speed reducer comprises a first rotating shaft, a first gear, a second rotating shaft, a second gear, a plurality of planet shafts, a first planet gear and a second planet gear, one end of each planet shaft is connected with the first planet gear, the other end of each planet shaft is connected with the second planet gear, and the first gear is arranged at the end, close to the planet shafts, of the first rotating shaft. The planet shaft is in transmission connection with the first gear through the first planet gear, the second gear is in clearance fit with the end, close to the second planet gear, of the second rotating shaft, and the second planet gear is in transmission connection with the second gear. Therefore, the transmission device is relatively simple in structure, relatively low in precision requirement on parts and long in service life, power division can be realized with relatively low processing difficulty and production cost without the aid of an inner gear ring, noise can be inhibited, and the running stability of the transmission device is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of transmission devices, and in particular to a transmission device and its application in a speed regulating device. Background Art

[0002] As a renewable energy, wind energy occupies an important position in the energy field, and the use of wind energy for power generation has a very broad development prospect. At present, in the practice of wind power generation, double feedback power generation equipment is usually used as wind power generation equipment, and its core components include gearboxes, which can increase the low speed of the wind wheel to a high speed suitable for power generation equipment.

[0003] In gearboxes with power splitting functions, the inner gear ring is often used as a transmission part. However, the processing difficulty of this inner gear ring is quite high, and the inner gear ring is mostly thin-walled. During heat treatment, its deformation degree is large, making it difficult to achieve the ideal quality standard. At the same time, during the operation of the gearbox, the inner gear ring will generate uncontrollable noise, thus affecting the stability of the equipment operation. Summary of the invention

[0004] In view of the above problems, the present application is proposed. The present application provides a transmission device and its application in a speed regulating device.

[0005] According to one aspect of the present application, a transmission device is provided, comprising:

[0006] A housing and a transmission assembly arranged in the housing; the transmission assembly includes a first rotating shaft, a first gear, a second rotating shaft, a second gear, a plurality of planetary shafts, a plurality of first planetary gears and a plurality of second planetary gears, one end of each planetary shaft is connected to each first planetary gear, and the other end of each planetary shaft is connected to each second planetary gear, the first gear is arranged at the end of the first rotating shaft close to the planetary shaft, each planetary shaft is transmission connected to the first gear through each first planetary gear, the second gear is clearance-matched with the end of the second rotating shaft close to the second planetary gear, and each second planetary gear is transmission connected to the second gear.

[0007] Compared with the prior art, the transmission device provided in the present application includes a housing and a transmission assembly arranged in the housing, wherein the transmission assembly includes a first rotating shaft, a first gear, a second rotating shaft, a second gear, a plurality of planetary shafts, a plurality of first planetary gears and a plurality of second planetary gears, wherein one end of each planetary shaft is connected to each first planetary gear, and the other end of each planetary shaft is connected to each second planetary gear, the first gear is arranged at the end of the first rotating shaft close to the planetary shaft, and each planetary shaft is connected to the first gear through each first planetary gear. Therefore, when power is transmitted to the first rotating shaft, the first rotating shaft and the first gear arranged thereon are driven to rotate, and each first planetary gear in a transmission connection state with the first gear immediately starts to rotate, and drives each planetary shaft to rotate together, so that the power can be dispersed to each planetary shaft. In other words, the first rotating shaft has the ability to divert the power input to the transmission assembly to a plurality of planetary shafts, which is conducive to improving the power density and load-bearing capacity of the transmission device and reducing the volume of the transmission device. On this basis, the second gear is clearance-matched with the end of the second rotating shaft close to the second planetary gear, and each second planetary gear is connected to the second gear. Therefore, power can be gathered from the second planetary gear connected to the other end of each planetary shaft to the second gear, and the second shaft can be driven to rotate by means of the transmission between the second planetary gear and the second gear, thereby achieving power output. In addition, since the second gear and the second shaft are not rigidly connected, during the transmission between the second planetary gear and the second gear, the second gear will always be in a floating state between the second planetary gears, and can achieve automatic meshing and centering by means of the second planetary gear. Accordingly, the second shaft only needs to bear the transmission of torque without bearing bending moment, thereby extending the service life of the transmission component while ensuring uniform distribution of load.

[0008] In summary, the transmission device provided in the present application has a relatively simple structure, relatively low requirements on the precision of parts, a long service life, and can achieve power diversion with low processing difficulty and production cost without the aid of an internal gear ring, thereby effectively suppressing the generation of noise and significantly enhancing the stability of the transmission device operation.

[0009] According to another aspect of the present application, there is provided a use of the above-mentioned transmission device in a speed regulating device.

[0010] Compared with the prior art, the beneficial effects of the application of the transmission device provided in the present application in the speed regulation device are the same as the beneficial effects of the above-mentioned transmission device, which will not be elaborated here.

[0011] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0013] Figure 1 A schematic diagram showing the structure of a transmission device according to an embodiment of the present application is shown;

[0014] Figure 2 A simplified cross-sectional view of a transmission device according to an embodiment of the present application is shown;

[0015] Figure 3 An exemplary diagram showing one of the derivative configurations of the transmission device according to the embodiment of the present application;

[0016] Figure 4 Shows Figure 3 A simplified cross-sectional view of a derivative configuration of the middle transmission device;

[0017] Figure 5 An exemplary diagram showing another derivative configuration of the transmission device of the embodiment of the present application;

[0018] Figure 6 Shows Figure 5 A simplified cross-sectional view of a derivative configuration of the transmission device.

[0019] Reference numerals:

[0020] 1-housing; 2-transmission assembly; 201-first rotating shaft; 202-first gear; 203-second rotating shaft; 2031-first-stage second rotating shaft; 2032-second-stage second rotating shaft; 204-second gear; 2041-first-stage second gear; 2042-second-stage second gear; 205-planetary shaft; 2051-first-stage planetary shaft; 2052-second-stage planetary shaft; 206-first planetary gear; 2061-first-stage first planetary gear; 2062-second-stage first planetary gear; 207-second planetary gear; 2071-first-stage second planetary gear; 2072-second-stage second planetary gear; 208-bearing; 209-third rotating shaft; 210-third gear; 211-fourth gear; 212-fourth rotating shaft; 213-fifth gear and 214-sixth gear. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more obvious, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0022] In a wind power generation system, a doubly-fed power generation device usually needs to be connected to a wind wheel. The speed of the wind wheel is generally low, and the doubly-fed power generation device needs a gearbox to increase the speed to reach the speed required for power generation. In addition, the torque generated by the wind wheel at different wind speeds is different. The gearbox can convert the torque of the wind wheel in a certain proportion to match it with the input torque requirement of the generator. This ensures that the generator operates within the appropriate torque range to avoid damage to the generator or low power generation efficiency due to excessive or insufficient torque. However, in a gearbox with a power splitting function, an inner gear ring is often used as a transmission part. The processing difficulty of this inner gear ring is quite high, and the inner gear ring is mostly a thin-walled structure. During heat treatment, its deformation degree is large, making it difficult to achieve the ideal quality standard. At the same time, during the operation of the gearbox, the inner gear ring will generate uncontrollable noise, thereby affecting the stability of the equipment operation.

[0023] In response to the above problems, the present application provides a transmission device which has a relatively simple structure, relatively low requirements on the precision of parts, a long service life, and can achieve power diversion with low processing difficulty and production cost without the aid of an internal gear ring, thereby effectively suppressing the generation of noise and significantly enhancing the stability of the transmission device operation. Figure 1 A schematic structural diagram of a transmission device according to an embodiment of the present application is shown. Figure 2 A cross-sectional diagram of the transmission device of an embodiment of the present application is shown. Figure 1 and Figure 2 As shown, the transmission device includes a housing 1 and a transmission assembly 2 disposed in the housing 1; the transmission assembly 2 includes a first rotating shaft 201, a first gear 202, a second rotating shaft 203, a second gear 204, a plurality of planetary shafts 205, a plurality of first planetary gears 206 and a plurality of second planetary gears 207, one end of each planetary shaft 205 is connected to each first planetary gear 206, and the other end of each planetary shaft 205 is connected to each second planetary gear 207, the first gear 202 is disposed at the end of the first rotating shaft 201 close to the planetary shaft 205, each planetary shaft 205 is transmission-connected to the first gear 202 through each first planetary gear 206, the second gear 204 is clearance-matched with the end of the second rotating shaft 203 close to the second planetary gear 207, and each second planetary gear 207 is transmission-connected to the second gear 204. It should be understood that Figure 2 This is a simplified cross-sectional diagram, omitting some components in the housing, and is only used to show the main connection relationships, among which: Figure 2The 205 actually refers to the planet shaft including the first planetary gear and the second planetary gear; Figure 2 The reference numeral 201 actually refers to the first rotating shaft including the first gear.

[0024] In specific implementation, when power is transmitted to the first rotating shaft 201, the first rotating shaft 201 and the first gear 202 arranged thereon will be driven to rotate. At this time, each first planetary gear 206 will immediately start to rotate and drive the planetary shaft 205 to rotate together. In this way, the power can be dispersed to each planetary shaft 205, which is conducive to improving the power density and carrying capacity of the transmission device and reducing the volume of the transmission device. Then, each planetary shaft 205 can drive the second planetary gear 207 arranged at the other end thereof to rotate, and make the second gear 204 meshing therewith rotate. In this process, power can be gathered from the second planetary gear 207 connected to the other end of each planetary shaft 205 to the second gear 204, and the second rotating shaft 203 can be driven to rotate by the transmission between the second planetary gear 207 and the second gear 204, so as to achieve power output. Furthermore, since the second gear 204 and the second rotating shaft 203 are not rigidly connected, during the transmission between the second planetary gears 207 and the second gear 204, the second gear 204 will always be in a floating state between the second planetary gears 207, and can achieve automatic meshing and centering by means of the second planetary gears 207. Accordingly, the second rotating shaft 203 only needs to bear the transmission of torque without bearing bending moment, thereby extending the service life of the transmission assembly 2 and ensuring uniform distribution of load.

[0025] In summary, the transmission device provided in the present application has a relatively simple structure, relatively low requirements on the precision of parts, a long service life, and can achieve power diversion with low processing difficulty and production cost without the aid of an internal gear ring, thereby effectively suppressing the generation of noise and significantly enhancing the stability of the transmission device operation.

[0026] In an alternative approach, Figure 1 As shown, the radial dimensions of the first gear 202 and the second planetary gear 207 in the embodiment of the present application are both larger than the radial dimensions of the first planetary gear 206 and the second gear 204. Since the larger radial dimension of the first gear 202 makes its pitch circle diameter relatively large, while the first planetary gear 206 has a smaller radial dimension and a smaller pitch circle diameter, when the power is transmitted from the first gear 202 to the first planetary gear 206, the speed of the first planetary gear 206 will be faster than the speed of the first gear 202, and the torque will be reduced accordingly. Similarly, for the second planetary gear 207 and the second gear 204, the second planetary gear 207 has a larger radial dimension, so that when transmitting power, it can drive the relatively smaller second gear 204 at a higher speed and reduce the torque at the same time.

[0027] For example, the transmission mode of the planetary shaft in the embodiment of the present application is fixed-axis transmission. In this transmission mode, the meshing position of the planetary shaft and other gears is relatively fixed, which can ensure that the contact point and transmission ratio are highly consistent each time the gears mesh. Figure 1 As shown, the transmission assembly 2 in the embodiment of the present application further includes a plurality of bearings 208, and the planetary shaft 205 is fixed in the housing 1 through the bearings 208. Therefore, when the transmission mode of the planetary shaft 205 is fixed-axis transmission, the bearings 208 are fixed, which facilitates the maintenance and lubrication of the bearings 208, and avoids the risk of failure of the bearings 208 due to structural limitations, the existence of rotation and revolution speed loads, and the difficulty of lubrication.

[0028] For example, Figure 1 As shown, the first rotating shaft 201 and the second rotating shaft 203 in the embodiment of the present application rotate coaxially. Therefore, in the process of power being transmitted from the first rotating shaft 201 to the second rotating shaft 203, no additional vibration and unbalanced force will be generated due to the eccentricity of the shaft, which is very beneficial for reducing the vibration and noise of the transmission device, especially in the case of high-speed operation, and can provide more stable power output.

[0029] It is understandable that the planetary shaft 205, the first rotating shaft 201 and the second rotating shaft 203 in the present application can be an integral shaft with gears, or a shaft without gears. When the shaft is a shaft without gears, the gears can be set at the corresponding positions of the shaft by welding, cylindrical pin connection and interference fit, and can be adjusted according to actual conditions, which is not limited here.

[0030] In practical applications, the present application can set up a multi-stage transmission assembly connected in series, so as to further improve the power diversion effect according to actual needs. For example: a transmission assembly including a first rotating shaft, a first gear, a second rotating shaft, a second gear, multiple planetary shafts, multiple first planetary gears and multiple second planetary gears is used as a first-stage transmission assembly, and a transmission assembly including a second rotating shaft, a second gear, multiple planetary shafts, multiple first planetary gears and multiple second planetary gears is used as a second-stage transmission assembly. When the first-stage transmission assembly is connected in series with the second-stage transmission assembly, the second rotating shaft in the first-stage transmission assembly is directly connected to the first planetary gear in the second-stage transmission assembly. That is to say, in the process of connecting multiple transmission assemblies in series, the second rotating shaft of the previous stage can play the role of the first rotating shaft of the next stage.

[0031] Figure 3 An exemplary diagram showing one of the derivative configurations of the transmission device according to the embodiment of the present application. Figure 4 Shows Figure 3 A cross-sectional diagram of the derivative configuration of the transmission device. Figure 3 and Figure 4As shown, the derivative configuration of the transmission device includes a housing 1, a first rotating shaft 201, a first gear 202, a primary second rotating shaft 2031, a primary second gear 2041, a primary planetary shaft 2051, a secondary second rotating shaft 2032, a secondary second gear 2042, a primary first planetary gear 2061, a primary second planetary gear 2071, a secondary planetary shaft 2052, a secondary first planetary gear 2062, and a secondary second planetary gear 2072. It should be understood that the above components are the same as those in Figure 1 The connection relationship, quantity relationship and working principle of the transmission device in are the same, the difference is that, in order to facilitate the transmission of power, the first-stage second rotating shaft 2031 has gears and is directly connected to the second-stage first planetary gear 2062. The first-stage second rotating shaft 2031 can be an integral shaft including gears or a rotating shaft with gears separately. The connection relationship of the gears and the type of the shaft can be adjusted according to the actual situation and are not limited here. In addition, Figure 4 This is a simplified cross-sectional diagram, omitting some components in the housing, and is only used to show the main connection relationships, among which: Figure 4 The 2051 in the figure actually refers to the first-stage planetary shaft including the first-stage planetary gear and the second-stage planetary gear; Figure 4 The reference numeral 201 actually refers to a first rotating shaft including a first gear; Figure 4 The 2052 in the figure actually refers to the secondary planetary shaft including the secondary first planetary gear and the secondary second planetary gear; Figure 4 The 2031 here actually refers to the first-stage second shaft including the gear.

[0032] In specific implementation, when power is transmitted to the first rotating shaft 201, the first rotating shaft 201 and the first gear 202 arranged thereon will be driven to rotate, and each first-stage first planetary gear 2061 in a transmission connection state with the first gear 202 will immediately start to rotate, and drive each first-stage planetary shaft 2051 to rotate together, so as to disperse the power to each first-stage planetary shaft 2051. Then, the power is converged to the first-stage second gear 2041 through the first-stage second planetary gear 2071, so as to transmit the power to the first-stage second rotating shaft 2031. In this configuration, the power is evenly distributed to the second-stage planetary shaft 2052 again through the first-stage second rotating shaft 2031 through its gear and the transmission of the second-stage first planetary gear 2062, so as to realize the secondary power diversion. Similarly, after the power diversion, it is converged to the second-stage second gear 2042 through the second-stage second planetary gear 2072. Similarly, since the secondary second gear 2042 and the secondary second shaft 2032 are not rigidly connected, the secondary second gear 2042 will always be in a floating state between the secondary second planetary gears 2072, and can achieve automatic meshing and centering by means of the secondary second planetary gears 2072. Accordingly, the secondary second shaft 2032 only needs to bear the transmission of torque without bearing the bending moment, thereby extending the service life of the transmission assembly 2 while ensuring uniform distribution of the load. It can be seen that the derivative configuration of another transmission device of the embodiment of the present application can not only achieve speed increase and torque reduction, but also achieve secondary power splitting.

[0033] Figure 5 An exemplary diagram showing another derivative configuration of the transmission device according to the embodiment of the present application. Figure 6 Shows Figure 5 A cross-sectional diagram of the derivative configuration of the transmission device. Figure 5 and Figure 6 As shown, the transmission assembly 2 in the embodiment of the present application further includes a third rotating shaft 209, a third gear 210, a fourth gear 211, a fourth rotating shaft 212, a fifth gear 213 and a sixth gear 214; the third gear 210 is arranged at the end of the second rotating shaft 203 away from the second gear 204, the fourth gear 211 is arranged at one end of the third rotating shaft 209, the third rotating shaft 209 is transmission-connected to the third gear 210 via the fourth gear 211, the fifth gear 213 is arranged at the other end of the third rotating shaft 209, the sixth gear 214 is arranged at the end of the fourth rotating shaft 212 close to the fifth gear 213, and the fourth rotating shaft 212 is transmission-connected to the fifth gear 213 via the sixth gear 214. It should be understood that Figure 6 This is a simplified cross-sectional diagram, omitting some components in the housing, and is only used to show the main connection relationships, among which: Figure 6 The 205 actually refers to the planet shaft including the first planetary gear and the second planetary gear; Figure 6 The reference numeral 201 actually refers to a first rotating shaft including a first gear; Figure 6 The reference numeral 203 actually refers to the second rotating shaft including the gear; Figure 6 The reference numeral 209 actually refers to the third rotating shaft including the fourth gear and the fifth gear; Figure 6 The 212 actually refers to the fourth rotating shaft including the sixth gear.

[0034] In specific implementation, when the second gear 204 drives the second rotating shaft 203 to rotate, the third gear 210 will be driven to rotate. Since the third rotating shaft 209 is connected to the third gear 210 through the fourth gear 211, the power of the second rotating shaft 203 can be further transmitted to the third rotating shaft 209. Then, the fifth gear 213 is arranged at the other end of the third rotating shaft 209, and the sixth gear 214 is arranged at the end of the fourth rotating shaft 212 close to the fifth gear 213. The fourth rotating shaft 212 is meshed with the fifth gear 213 through the sixth gear 214 to achieve transmission connection. In this way, the power on the third rotating shaft 209 can be further transmitted to the fourth rotating shaft 212, meeting the power requirements of different working parts.

[0035] For example, Figure 5 and Figure 6 As shown, the radial dimensions of the third gear 210 and the fifth gear 213 in the embodiment of the present application are greater than the radial dimensions of the fourth gear 211 and the sixth gear 214. Among them, since the radial dimension of the third gear 210 is greater than the radial dimension of the fourth gear 211, when the power is transmitted from the second rotating shaft 203 to the third rotating shaft 209, the speed increases and the torque decreases. Since the radial dimension of the fifth gear 213 is greater than the radial dimension of the sixth gear 214, when the power is transmitted from the third rotating shaft 209 to the fourth rotating shaft 212, the speed increases again and the torque decreases again. It can be seen that another derivative configuration of the transmission device in the embodiment of the present application can achieve speed increase and torque reduction, and can only achieve one power split.

[0036] For example, Figure 1 , Figure 3 and Figure 5 As shown, the above-mentioned rotating shaft of the transmission assembly 2 in the embodiment of the present application is fixed in the housing 1 through the bearing 208. When the rotating shaft rotates in the housing 1, the bearing 208 can effectively reduce the friction between the rotating shaft and the housing 1. It should be understood that the type of the bearing 208 in the embodiment of the present application can be adjusted according to the force condition and working requirements of the rotating shaft, and is not limited here.

[0037] The present application also provides an application of the above-mentioned transmission device in a speed regulating device, which realizes power diversion with lower processing difficulty and production cost, and can effectively suppress the generation of noise, thereby significantly enhancing the stability of the operation of the speed regulating device.

[0038] Exemplarily, the application is the application of the transmission device in wind power generation equipment. Among them, the first rotating shaft can be connected to the blades of the wind turbine through a flange, as a power input end, to receive the low-speed rotational power from the wind turbine, and the speed transmitted is low but the torque is large. Then, the planetary shaft, the first planetary gear and the second planetary gear can flexibly adjust the transmission ratio according to different wind speeds and wind wheel speeds, and convert the relatively low-speed and high-torque input into an intermediate state with relatively high speed and relatively low torque and output it to the second rotating shaft. At this time, the second rotating shaft receives the power after the speed increase of the second planetary gear through the second gear, and continues to transmit it to the subsequent gear transmission chain, in preparation for further increasing the speed. When the power reaches the speed and torque expected by the design, it can be output through the rotating shaft, and the rotating shaft is connected to the generator to achieve efficient power generation.

[0039] For example, the application is the application of the transmission device in material handling equipment. In which, the power device can be connected to the rotating shaft for power output, and the output device can be connected to the rotating shaft for power input. At this time, the transmission device can play the role of reducing speed and increasing torque, and its power transmission path is opposite, and the principle is consistent with the transmission device in the embodiment of the present application.

[0040] The above is only a specific implementation of the present application. Obviously, various modifications and combinations can be made without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are only exemplary illustrations of the present application as defined by the attached claims, and are deemed to have covered any and all modifications, changes, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these changes and variations. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0041] It should also be noted that in the device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0042] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0043] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A transmission device, characterized in that: include: A housing and a transmission assembly arranged in the housing; the transmission assembly includes a first rotating shaft, a first gear, a second rotating shaft, a second gear, a plurality of planetary shafts, a plurality of first planetary gears and a plurality of second planetary gears, one end of each of the planetary shafts is connected to each of the first planetary gears, and the other end of each of the planetary shafts is connected to each of the second planetary gears, the first gear is arranged at the end of the first rotating shaft close to the planetary shaft, each of the planetary shafts is transmission-connected to the first gear through each of the first planetary gears, the second gear is clearance-matched with the end of the second rotating shaft close to the second planetary gear, and each of the second planetary gears is transmission-connected to the second gear.

2. The transmission device according to claim 1, characterized in that: The radial dimensions of the first gear and the second planetary gear are both larger than the radial dimensions of the first planetary gear and the second gear.

3. The transmission device according to claim 2, characterized in that: The transmission mode of the planetary shaft is fixed-axis transmission.

4. The transmission device according to claim 3, characterized in that: The first rotating shaft and the second rotating shaft rotate coaxially.

5. The transmission device according to any one of claims 1 to 4, characterized in that: The transmission assembly also includes a third rotating shaft, a third gear, a fourth gear, a fourth rotating shaft, a fifth gear and a sixth gear; the third gear is arranged at the end of the second rotating shaft away from the second gear, the fourth gear is arranged at one end of the third rotating shaft, the third rotating shaft is transmission connected to the third gear through the fourth gear, the fifth gear is arranged at the other end of the third rotating shaft, the sixth gear is arranged at the end of the fourth rotating shaft close to the fifth gear, and the fourth rotating shaft is transmission connected to the fifth gear through the sixth gear.

6. The transmission device according to claim 5, characterized in that: The radial dimensions of the third gear and the fifth gear are both greater than the radial dimensions of the fourth gear and the sixth gear.

7. The transmission device according to claim 5, characterized in that: The transmission assembly further includes a plurality of bearings, and the first rotating shaft, the planetary shaft, the second rotating shaft, the third rotating shaft and the fourth rotating shaft are all fixed in the housing through the bearings.

8. Use of the transmission device according to any one of claims 1 to 7 in a speed regulating device.

9. The use according to claim 8, characterized in that: The application is the application of the transmission device in a wind power generation device.

10. The use according to claim 8, characterized in that: The application is the application of the transmission device in material handling equipment.

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