Deflection gearbox

Abstract

The utility model provides a deflection gearbox, and relates to the technical field of transmission. The deflection gearbox comprises a box body, an input shaft, a composite coupling planetary transmission mechanism and an output shaft. The input shaft and the output shaft are rotatably mounted on the box body; the box body is provided with a transmission tooth part. The composite coupling planetary transmission mechanism comprises a sun gear, a planet gear, a planet carrier and an output gear ring; the input shaft is connected with the sun gear, the sun gear is meshed with the planet gear, and the planet gear is rotatably installed on the planet carrier; the planet gear is provided with a first tooth part and a second tooth part which are arranged in the axial direction of the planet gear, the first tooth part is meshed with the transmission tooth part, and the second tooth part is meshed with the output gear ring; and the output gear ring is connected with the output shaft. The gearbox is few in parts, small in overall size and weight, low in machining and manufacturing cost and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a skew gear box. Background Art

[0002] The yaw gearbox is an important part of the wind turbine, used to adjust the angle of the nacelle and blades. Due to the harsh working conditions, inconvenient maintenance, and small installation space, the yaw gearbox has strict requirements on reliability, weight, and dimensions.

[0003] The inventors have found that the prior art skew gearbox has at least the following disadvantages:

[0004] Since yaw pitch control requires a high gearbox speed ratio, traditional yaw gearboxes generally use a multi-stage planetary structure. For example, the pitch gearbox uses 3 stages, and the yaw gearbox uses 4-5 stages. This results in the gearbox having many parts, large size and weight, high cost, and inconvenient assembly. Utility Model Content

[0005] The utility model aims to provide a deflection gearbox, which can reduce parts, reduce overall size and weight, reduce manufacturing costs, and improve assembly convenience.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides a skew gearbox, comprising:

[0008] A housing, an input shaft, a composite coupled planetary transmission mechanism and an output shaft; the input shaft and the output shaft are both rotatably mounted on the housing; the housing is provided with a transmission gear portion;

[0009] The compound coupling planetary transmission mechanism includes a sun gear, a planet gear, a planet carrier and an output ring gear; the input shaft is connected to the sun gear, the sun gear is meshed with the planet gear, and the planet gear is rotatably mounted on the planet carrier; the planet gear is provided with a first tooth portion and a second tooth portion arranged in its axial direction, the first tooth portion is meshed with the transmission tooth portion, and the second tooth portion is meshed with the output ring gear; the output ring gear is connected to the output shaft.

[0010] In an optional embodiment, the housing includes a first shell, an intermediate shell and a second shell connected in sequence, the input shaft is rotatably mounted on the first shell; the transmission tooth portion is formed on the inner wall surface of the intermediate shell; and the output shaft is rotatably mounted on the second shell.

[0011] Based on the above solution, the box is set as a split structure, and each part can be processed and manufactured independently, which reduces the processing difficulty and improves the processing accuracy. After the multiple parts are processed, they are assembled together according to the needs, which can realize on-site assembly. During transportation, each part is small in size and occupies little space, which reduces the transportation and storage costs. At the same time, it is also convenient to install multiple parts in the box.

[0012] In an optional embodiment, an assembly hole is provided on the planet carrier, a positioning pin is passed through the assembly hole, and the planetary gear is sleeved outside the positioning pin.

[0013] Based on the above scheme, the locating pin is inserted into the assembly hole, and the position of the locating pin is limited by the assembly hole. The position of the locating pin and the planetary carrier is stable and reliable. The planetary gear is sleeved outside the locating pin and is limited by the locating pin. The position of the planetary gear is stable and reliable.

[0014] In an optional embodiment, a first bearing is externally connected to the positioning pin, the planetary gear is sleeved outside the first bearing, and the planetary gear is rotatably matched with the positioning pin.

[0015] Based on the above solution, the positioning pin can be interference fit with the planet carrier, improving the firmness of the assembly of the positioning pin and the planet carrier. The planetary wheel is rotatably matched with the positioning pin through the first bearing, and the planetary wheel rotates flexibly, has low friction, low wear, and long service life.

[0016] In an optional embodiment, the number of the first bearings is multiple and they are arranged in the axial extension direction of the locating pin, and the locating pin is provided with multiple first retaining rings, and the multiple first retaining rings cooperate to limit the freedom of the multiple first bearings in the axial extension direction of the locating pin.

[0017] Based on the above scheme, by setting up multiple first bearings, the axial size of each first bearing in the locating pin can be reduced, thereby improving the structural strength of each first bearing. Each first bearing is not easy to deform during operation, and the operation is stable and reliable. Multiple first bearings cooperate to carry the planetary gear, and the operation of the planetary gear is stable and reliable.

[0018] In an optional embodiment, a second bearing is externally connected to the locating pin, the second bearing is embedded in the assembly hole, and the locating pin is rotatably matched with the assembly hole.

[0019] Based on the above solution, the positioning pin is rotatably matched with the planet carrier through the second bearing, thereby achieving rotatable matching of the planet wheel relative to the planet carrier.

[0020] In an optional embodiment, the output gear ring includes a first ring plate and a second ring plate that are connected, the inner diameter of the first ring plate is larger than the inner diameter of the second ring plate, a tooth body is provided on the first ring plate, and the second tooth portion is meshed with the tooth body; the second ring plate is sleeved on the outside of the output shaft and fixedly connected to the output shaft.

[0021] Based on the above scheme, by setting the output ring gear to a structure in which the first ring plate and the second ring plate cooperate, the inner diameter of the second ring plate is smaller than that of the first ring plate. On the premise of ensuring the structural strength of the first ring plate and the second ring plate, the outer diameter of the second ring plate can also be set to be smaller than the outer diameter of the first ring plate. In this way, the second ring plate has a small volume and occupies a small space, which can reduce the size of the box corresponding to the second ring plate accordingly, making the structure of the entire gear box more compact.

[0022] In an optional embodiment, the input shaft and the sun gear are interference fit, the input shaft and the sun gear are spline connected, or the input shaft and the sun gear are bolted.

[0023] Based on the above solution, the input shaft and the sun gear are connected in various ways, which can be selected according to needs, and the assembly is flexible and convenient.

[0024] In an optional embodiment, the output shaft and the output gear ring are interference fit, the output shaft and the output gear ring are spline connected, or the output shaft and the output gear ring are bolted.

[0025] Based on the above solution, the connection methods between the output shaft and the output gear ring are various and can be selected according to the needs, making the assembly flexible and convenient.

[0026] In an optional embodiment, the planet carrier is rotatably matched with the input shaft or the output shaft via a third bearing.

[0027] Based on the above scheme, the assembly method of the planet carrier is flexible, can be selected as needed, and is easy to assemble.

[0028] The beneficial effects of the embodiments of the utility model are:

[0029] In summary, the skew gearbox provided in this embodiment integrates the first tooth portion and the second tooth portion on the planetary gear, so that the planetary gear can mesh with the transmission tooth portion and the output gear ring at the same time, realize multi-stage speed ratio adjustment, and meet the output speed ratio requirements. The planetary gear is used in conjunction with a planetary carrier, and the planetary gear is driven by a sun gear. Compared with the traditional multi-stage planetary transmission structure, at least one planetary carrier and at least one sun gear can be reduced, and the bearings and other structures required for installing the planetary carrier and the sun gear are correspondingly reduced, and some parts are reduced, the structure is simplified, and the overall structure is more compact, small in size, light in weight, and easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of a deflection gearbox according to an embodiment of the utility model;

[0032] Figure 2 It is a schematic diagram of a modified example of the skew gearbox according to an embodiment of the present utility model.

[0033] icon:

[0034] 100-housing; 110-first housing; 120-intermediate housing; 121-transmission gear portion; 130-second housing; 140-bolt; 200-input shaft; 300-compound coupling planetary transmission mechanism; 310-sun gear; 320-planetary gear; 321-first gear portion; 322-second gear portion; 330-planet carrier; 340-output gear ring; 341-first ring plate; 342-second ring plate; 350-first bearing; 360-locating pin; 370-retaining ring; 400-input bearing; 500-output shaft; 510-output bearing; 600-planetary transmission mechanism; 610-center wheel; 620-transmission planetary gear; 630-transmission planet carrier; 640-transmission gear ring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the prior art, in order to achieve a high speed ratio transmission, the variable gearbox is provided with a multi-stage planetary transmission structure between the input shaft 200 and the output shaft 500. The multi-stage planetary transmission structure is arranged in the axial direction of the input shaft 200 or the output shaft 500. Each stage of the planetary transmission structure includes mutually cooperating components such as a sun gear 310, a planetary gear 320, a planetary carrier 330, a ring gear and a bearing. In this way, after the multi-stage planetary transmission structure is coordinated, the entire gearbox has many components, a large overall volume, a heavy weight, a high cost, and is inconvenient to assemble.

[0042] In view of this, the designer provides a deflection gearbox, which can reduce the overall volume, reduce the overall weight, reduce the difficulty of assembly, and reduce the manufacturing cost by reducing the number of parts.

[0043] Please combine Figure 1In this embodiment, the deflection gearbox includes a housing 100, an input shaft 200, a compound coupled planetary transmission mechanism 300 and an output shaft 500. The input shaft 200 and the output shaft 500 are both rotatably mounted on the housing 100; the housing 100 is provided with a transmission gear portion 121. The compound coupled planetary transmission mechanism 300 includes a sun gear 310, a planetary gear 320, a planetary carrier 330 and an output ring gear 340; the input shaft 200 is connected to the sun gear 310, the sun gear 310 is meshed with the planetary gear 320, and the planetary gear 320 is rotatably mounted on the planetary carrier 330; the planetary gear 320 is provided with a first tooth portion 321 and a second tooth portion 322 arranged in its axial direction, the first tooth portion 321 is meshed with the transmission tooth portion 121, and the second tooth portion 322 is meshed with the output ring gear 340; the output ring gear 340 is connected to the output shaft 500.

[0044] Based on the above, the working mode of the skew gearbox provided in this embodiment is as follows:

[0045] The power input components such as the motor are connected to the input shaft 200. After the motor is started, it drives the input shaft 200 to rotate, and the input shaft 200 drives the sun gear 310 to rotate. While the planetary gear 320 rotates, the planetary carrier 330 revolves around the axis of the sun gear 310 with the cooperation of the transmission gear portion 121. While the planetary gear 320 rotates and revolves, it drives the output ring gear 340 to rotate around the axial direction of the sun gear 310, so that the output shaft 500 is driven to rotate through the output ring gear 340 to achieve torque output.

[0046] It should be understood that by integrating the first tooth portion 321 and the second tooth portion 322 on the planetary gear 320, the planetary gear 320 can mesh with the transmission tooth portion 121 and the output gear ring 340 at the same time, realize multi-stage speed ratio adjustment, and meet the output speed ratio requirements. The planetary gear 320 is used in conjunction with a planetary carrier 330, and the planetary gear 320 is driven by a sun gear 310. Compared with the traditional multi-stage planetary transmission structure, the planetary carrier 330, sun gear 310, inner gear ring, planetary gear and bearing parts can be reduced, the structure is simplified, the overall structure is more compact, small in size, light in weight, and easy to assemble.

[0047] The following embodiments illustrate the details of the deflection gearbox provided in the present application by way of examples.

[0048] Please combine Figure 1 In this embodiment, the skew gearbox optionally includes a housing 100, an input shaft 200, a compound coupled planetary transmission mechanism 300, and an output shaft 500. The input shaft 200 and the output shaft 500 are both rotatably mounted on the housing 100, and the input shaft 200 is connected to the output shaft 500 through the compound coupled planetary transmission mechanism 300, so that the torque of the input shaft 200 can be output to the output shaft 500 through the compound coupled planetary transmission mechanism 300.

[0049] In this embodiment, the housing 100 is optionally configured as a split structure. For example, the housing 100 includes a first housing 110, an intermediate housing 120, and a second housing 130 connected in sequence. The first housing 110 and the intermediate housing 120 can be connected by fasteners such as bolts 140, and the intermediate housing 120 and the second housing 130 can be fixedly connected by fasteners such as bolts 140, which is convenient for installation and disassembly. A transmission tooth portion 121 is formed on the inner wall surface of the intermediate housing 120, so that the intermediate housing 120 can be understood as a gear ring structure. By configuring the housing 100 as a split structure, it is easy to process and manufacture, easy to disassemble and assemble, reduce the difficulty of assembly, and improve assembly efficiency.

[0050] During installation, the input shaft 200 can be rotatably installed in the first housing 110 through the input bearing 400. The output shaft 500 can be rotatably installed in the second housing 130 through the output bearing 510. The types of the input bearing 400 and the output bearing 510 are not limited, and the number of the input bearing 400 and the output bearing 510 is not limited. When the input shaft 200 and the output shaft 500 are installed, the axes of the input shaft 200 and the output shaft 500 are collinear, that is, the input shaft 200 and the output shaft 500 are coaxially arranged.

[0051] It should be noted that, in order to improve the installation firmness of the input bearing 400 and the output bearing 510 , the input bearing 400 and the output bearing 510 may be limited by a retaining ring 370 , respectively.

[0052] In this embodiment, optionally, the composite coupling planetary transmission mechanism 300 includes a sun gear 310, a plurality of planetary gears 320, a plurality of positioning pins 360, a planet carrier 330 and an output ring gear 340. The input shaft 200 is connected to the sun gear 310, and the two can be connected by splines, bolts 140, etc., or the two can be connected by interference fit, so that the two can rotate differently and transmit torque. The number of planetary gears 320 is set as required, and each planetary gear 320 is rotatably matched with the planet carrier 330 through the corresponding positioning pin 360. The planetary gear 320 can be rotatably matched with the positioning pin 360 through the first bearing 350, and the positioning pin 360 is fixed on the planet carrier 330 to achieve a rotatable connection between the planetary gear 320 and the planet carrier 330. Alternatively, the planetary gear 320 can be fixed on the positioning pin 360, and the positioning pin 360 is rotatably connected to the planetary carrier 330 through the second bearing, so as to realize the rotatable connection between the planetary gear 320 and the planetary carrier 330, and the installation method is flexible and can be selected as needed, and the installation is convenient and reliable. The planetary carrier 330 can be rotatably matched with the input shaft 200 or the output shaft 500 through a bearing. For example, in this embodiment, the planetary carrier 330 is rotatably matched with the output shaft 500 through a bearing.

[0053] It should be noted that, in order to facilitate the installation of the positioning pin 360, a plurality of assembly holes are provided on the planet carrier 330, and each positioning pin 360 cooperates with the corresponding assembly hole, which can improve the accuracy and firmness of the installation position of the positioning pin 360, thereby improving the stability and reliability of the operation of the planetary gear 320 relative to the planet carrier 330. The positioning pin 360 is inserted into the assembly hole, and a retaining ring 370 can be provided on the hole wall of the assembly hole to limit the axial freedom of the positioning pin 360 in the assembly hole.

[0054] It should be understood that since the planetary gear 320 is provided with the first tooth portion 321 and the second tooth portion 322, the size of the planetary gear 320 in its axial direction is relatively long. When the planetary gear 320 and the positioning pin 360 are rotatably matched through the first bearing 350, in order to improve the stability of the first bearing 350, a plurality of first bearings 350 are sleeved on the positioning pin 360, and the axial size of each first bearing 350 is reduced, the structural strength is high, and the operation is more stable and reliable. For example, in this embodiment, the number of the first bearings 350 can be two. At the same time, in order to improve the stability of the plurality of first bearings 350 in the axial direction of the positioning pin 360, a plurality of retaining rings 370 are provided on the positioning pin 360, and the plurality of retaining rings 370 cooperate to limit the freedom of the first bearing 350 in the axial direction of the positioning pin 360. For example, when there are two first bearings 350 , there are three retaining rings 370 on the same positioning pin 360 , one retaining ring 370 is disposed on the outer side of each first bearing 350 , and one retaining ring 370 is disposed between two first bearings 350 .

[0055] In addition, the planet carrier 330 may also be configured as a cantilever structure, so that the positioning pin 360 and the planet carrier 330 may be designed as an integrated structure with high structural strength and long service life.

[0056] Optionally, the gear parameters of the first tooth portion 321 and the second tooth portion 322 on the planetary gear 320 can be set to be the same or different. When the gear parameters of the first tooth portion 321 and the second tooth portion 322 are set to be the same, the structure of the planetary gear 320 is more regular and the processing is more convenient. When the gear parameters of the first tooth portion 321 and the second tooth portion 322 are set to be different, for example, the outer diameter of the first tooth portion 321 is larger than the outer diameter of the second tooth portion 322, the design is flexible and changeable according to the speed ratio requirements.

[0057] It is worth noting that gear parameters include but are not limited to gear outer diameter, tooth shape and number of teeth.

[0058] It should be understood that the first tooth portion 321 and the second tooth portion 322 of the planetary gear 320 can be set as an integrated structure, or the planetary gear 320 uses two independent gears fixed together by welding or the like, and ensures that the phase between the first tooth portion 321 and the second tooth portion 322 meets the design requirements.

[0059] Optionally, the output gear ring 340 includes a first ring plate 341 and a second ring plate 342 connected to each other, and the cross-sections of the first ring plate 341 and the second ring plate 342, that is, the plane profiles perpendicular to the axis, are both circular rings. The inner diameter of the first ring plate 341 is greater than the inner diameter of the second ring plate 342, and the outer diameter of the first ring plate 341 is greater than the outer diameter of the second ring plate 342. The first ring plate 341 is provided with a tooth body, and the second tooth portion 322 is meshed with the tooth body. The second ring plate 342 is sleeved on the outside of the output shaft 500 and is fixedly connected to the output shaft 500. The second ring plate 342 and the output gear ring 340 are interference fit, the second ring plate 342 and the output gear ring 340 are splined, or the second ring plate 342 and the output gear ring 340 are connected by bolts 140. The first ring plate 341 and the second ring plate 342 can be set as an integrated structure, which has high structural strength, is not easy to deform during use, and has a long service life. Since the sizes of the first ring plate 341 and the second ring plate 342 are set to be different, the second ring plate 342 is small in size and occupies a small space, which can reduce the size of the box body 100 corresponding to the second ring plate 342 accordingly, making the structure of the entire gear box more compact.

[0060] Please combine Figure 2 In other embodiments, optionally, in order to further adjust the speed ratio, a planetary transmission mechanism 600 may be added between the input shaft 200 and the compound coupling planetary transmission mechanism 300, and the planetary transmission mechanism 600 includes a central wheel 610, a transmission planetary wheel 620, a transmission planetary carrier 630, and a transmission ring gear 640. The central wheel 610 is connected to the input shaft 200, the transmission planetary wheel 620 is rotatably mounted on the transmission planetary carrier 630, the transmission planetary carrier 630 is rotatably matched with the central wheel 610, and the transmission planetary carrier 630 is connected with the sun gear 310. The transmission ring gear 640 is fixed between the first housing 110 and the intermediate housing 120, and the transmission planetary wheel 620 is meshed with the transmission ring gear 640. In this way, the input shaft 200 inputs torque, drives the central wheel 610 to rotate, and through the cooperation of the transmission planetary wheel 620, the transmission planetary carrier 630 and the transmission ring gear 640, the torque is output from the transmission planetary carrier 630, thereby driving the sun gear 310 to rotate. It should be understood that adding a planetary transmission mechanism 600 according to needs can meet different scene requirements and has a wide range of uses.

[0061] The deflection gearbox provided in this embodiment has fewer parts, a small size, a light weight, and is easy to assemble.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A skew gearbox, characterized in that: include: A housing (100), an input shaft (200), a composite coupling planetary transmission mechanism (300) and an output shaft (500); the input shaft (200) and the output shaft (500) are both rotatably mounted on the housing (100); the housing (100) is provided with a transmission tooth portion (121); The compound coupling planetary transmission mechanism (300) comprises a sun gear (310), a planet gear (320), a planet carrier (330) and an output ring gear (340); the input shaft (200) is connected to the sun gear (310), the sun gear (310) is meshed with the planet gear (320), and the planet gear (320) is rotatably mounted on the planet carrier (330); the planet gear (320) is provided with a first tooth portion (321) and a second tooth portion (322) arranged in its axial direction, the first tooth portion (321) is meshed with the transmission tooth portion (121), and the second tooth portion (322) is meshed with the output ring gear (340); the output ring gear (340) is connected to the output shaft (500).

2. The skew gearbox according to claim 1, characterized in that: The housing (100) comprises a first housing (110), an intermediate housing (120) and a second housing (130) which are connected in sequence; the input shaft (200) is rotatably mounted on the first housing (110); the transmission tooth portion (121) is formed on the inner wall surface of the intermediate housing (120); and the output shaft (500) is rotatably mounted on the second housing (130).

3. The skew gearbox according to claim 1, characterized in that: The planet carrier (330) is provided with an assembly hole, a positioning pin (360) is inserted into the assembly hole, and the planet gear (320) is sleeved outside the positioning pin (360).

4. The skew gearbox according to claim 3, characterized in that: The positioning pin (360) is externally connected to a first bearing (350), the planetary gear (320) is sleeved outside the first bearing (350), and the planetary gear (320) and the positioning pin (360) are rotatably matched.

5. The skew gearbox according to claim 4, characterized in that: The number of the first bearings (350) is multiple and they are arranged in the axial extension direction of the positioning pin (360). The positioning pin (360) is provided with multiple first retaining rings (370), and the multiple first retaining rings (370) cooperate to limit the freedom of the multiple first bearings (350) in the axial extension direction of the positioning pin (360).

6. The skew gearbox according to claim 3, characterized in that: The outer shell of the positioning pin (360) is connected with a second bearing, the second bearing is embedded in the assembly hole, and the positioning pin (360) is rotatably matched with the assembly hole.

7. The skew gearbox according to claim 1, characterized in that: The output gear ring (340) comprises a first ring plate (341) and a second ring plate (342) which are connected to each other. The inner diameter of the first ring plate (341) is larger than the inner diameter of the second ring plate (342). A tooth body is provided on the first ring plate (341), and the second tooth portion (322) meshes with the tooth body. The second ring plate (342) is sleeved on the outside of the output shaft (500) and is fixedly connected to the output shaft (500).

8. The skew gearbox according to claim 1, characterized in that: The input shaft (200) and the sun gear (310) are interference fit, the input shaft (200) and the sun gear (310) are spline connected, or the input shaft (200) and the sun gear (310) are connected by bolts (140).

9. The skew gearbox according to claim 1, characterized in that: The output shaft (500) and the output gear ring (340) are interference fit, the output shaft (500) and the output gear ring (340) are spline connected, or the output shaft (500) and the output gear ring (340) are connected by bolts (140).

10. The skew gearbox according to claim 1, characterized in that: The planet carrier (330) is rotatably matched with the input shaft (200) or the output shaft (500) via a third bearing.

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