Gearbox output structure and gearbox assembly

Abstract

The application provides a gear box output structure and a gear box assembly. The gear box output structure comprises a mounting box, an output shaft, a bearing and an output planet carrier. The mounting box is used for connecting with a gear ring of a gear box shell assembly. One end of the output shaft is provided with an assembly inner hole. The inner ring of the bearing is sleeved on the output shaft and fixedly connected with the output shaft. The outer ring of the bearing is fixed on the mounting box, so that the output shaft and the mounting box are rotatably matched. The output planet carrier is inserted into the assembly inner hole and fixed relative to the output shaft in the circumferential direction. The output structure has small axial dimension, light weight, low cost and convenient maintenance.

Description

Technical Field

[0001] This invention relates to the field of mechanical structures, and more specifically, to a gearbox output structure and a gearbox assembly. Background Technology

[0002] Yaw and pitch gearboxes typically employ planetary gear transmission. The output shaft is supported by two tapered roller bearings mounted back-to-back. The output shaft is fixedly connected to the output planetary carrier via an external spline. Torque is transmitted to the output shaft through the output planetary carrier, thereby driving the output shaft to rotate.

[0003] The inventors discovered the following drawbacks in existing yaw and pitch gearboxes:

[0004] Multiple components are arranged outside the output shaft, and each component requires space along the axial direction of the output shaft. Moreover, the spaces corresponding to these components do not overlap in the axial direction, resulting in a large axial dimension of the output shaft and the entire gearbox output section. This increases the overall weight and cost. Summary of the Invention

[0005] The purpose of this invention is to provide a gearbox output structure and gearbox assembly that can reduce the axial dimension of the output shaft, reduce weight, lower cost, and improve the smoothness and reliability of the output shaft rotation.

[0006] The embodiments of the present invention are implemented as follows:

[0007] In a first aspect, the present invention provides a gearbox output structure, comprising:

[0008] The assembly includes a housing, an output shaft, bearings, and an output planetary carrier. The housing is used to connect to the gearbox housing assembly. One end of the output shaft has an inner mounting hole. The inner ring of the bearing is fitted onto the output shaft and fixedly connected to it. The outer ring of the bearing is fixed to the housing so that the output shaft and the housing can be rotatably fitted together. The output planetary carrier is inserted into the inner mounting hole, and both are fixed relative to each other in the circumferential direction of the output shaft.

[0009] In an optional embodiment, a limiting protrusion is provided on the outer peripheral surface of the output shaft, and the inner ring abuts against the limiting protrusion on one side of the output shaft along the axial direction; a limiting nut is screwed onto the outer side of the output shaft, and the limiting nut abuts against the side of the inner ring away from the limiting protrusion.

[0010] In an optional embodiment, the gearbox output structure further includes an oil seal assembly disposed between the limiting nut and the mounting housing; the number of bearings is multiple, and the multiple bearings are all located on the same side of the oil seal assembly.

[0011] In an optional embodiment, the output planetary carrier has a first weight-reduction hole on the side away from the assembly inner hole, and a sealing plate is provided on the output planetary carrier to close the first weight-reduction hole; the output shaft has a second weight-reduction hole communicating with the assembly inner hole, and a sealing ring is provided between the assembly inner hole and the output planetary carrier.

[0012] In an optional embodiment, the gearbox output structure further includes an oil seal assembly disposed between the output planetary carrier and the mounting housing, and the number of bearings is multiple, with all bearings located on the same side of the oil seal assembly.

[0013] In an optional implementation, the mounting housing is configured as a split structure.

[0014] In an optional embodiment, the mounting housing includes a connected mounting flange and a mounting housing, the mounting flange being used to connect to the gearbox housing assembly, and the outer ring of the bearing being fixed within the mounting housing.

[0015] In an optional embodiment, the mounting housing further includes an adjusting ring, which is connected to both the mounting flange and the mounting housing, for adjusting the axial dimension of the mounting flange on the output shaft.

[0016] In an optional embodiment, the bearing is configured as a self-sealing bearing.

[0017] In a second aspect, the present invention provides a gearbox assembly, comprising:

[0018] The gearbox housing assembly, the planetary transmission assembly, and the gearbox output structure described in any of the foregoing embodiments, wherein the gearbox housing assembly is connected to the mounting housing, the planetary transmission assembly is installed inside the gearbox housing assembly, and the planetary transmission assembly is connected to the output planet carrier.

[0019] The beneficial effects of the embodiments of the present invention are:

[0020] In summary, the gearbox output structure provided in this embodiment, by providing an mounting inner hole at the end of the output shaft, allows a portion of the output planetary carrier to be inserted into the mounting inner hole, thus achieving a fixed connection between the output planetary carrier and the output shaft. This enables torque transmission to the output shaft via the output planetary carrier. Since the output planetary carrier is partially inserted into the mounting inner hole, it occupies the internal space of the output shaft without affecting the use of the external space. In other words, it does not interfere with the installation space of bearings or other components. The space required by the output planetary carrier overlaps with the space of bearings and other components along the axial direction of the output shaft. Therefore, compared to the output shaft of existing gearboxes, the axial dimension of the output shaft in this embodiment is shorter, resulting in a smaller overall size, lighter weight, and lower manufacturing costs for the gearbox assembly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the gearbox output structure in the prior art;

[0023] Figure 2 This is a schematic diagram of the gearbox output structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a modified example of the gearbox output structure according to an embodiment of the present invention;

[0025] Figure 4 For this Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;

[0026] Figure 5 This is a schematic diagram of another variation of the gearbox output structure according to an embodiment of the present invention.

[0027] icon:

[0028] 01-Output shaft; 02-Tapered roller bearing; 03-Planetary carrier; 04-Mounting housing; 05-Gear ring; 06-Round nut; 07-Skeleton oil seal; 08-End sealing structure;

[0029] 001-Gear ring; 002-Planetary gear; 100-Mounting housing; 110-Mounting flange; 120-Lower housing; 121-First cavity; 130-Adjusting ring; 200-Output shaft; 201-Assembly inner hole; 210-First shaft section; 220-Second shaft section; 221-Second weight reduction hole; 230-Step; 300-First bearing; 400-Second bearing; 500-Output planetary carrier; 510-First weight reduction hole; 520-Sealing plate; 530-First sealing ring; 540-Second sealing ring; 550-Second cavity; 600-Limit nut; 700-Spline; 800-Oil seal assembly; 900-Stop; 1000-Distance ring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply 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.

[0035] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] like Figure 1 As shown, yaw and pitch gearboxes generally employ planetary transmission. The output shaft 01 is fitted with two back-to-back tapered roller bearings 02 to the mounting housing 04. The output shaft is connected to the planetary carrier 03 via an external spline. The two tapered roller bearings are directly mounted on the output shaft and preloaded using round nuts 06. One end of the mounting housing is connected to a gear ring 05, and the other end is fitted with an end seal structure 08 between it and the output shaft. The overall length of the output assembly is determined by Ls + L1 + Ln + Lb + L2. Here, Ls represents the spline fit length, Lb represents the width of the bearing pair (two bearing widths + bearing span), L1 is the width of the spline relief groove, Ln is the width of the round nut, and L2 is the sealing width of the end seal structure 08. Due to limitations in the spline and bearing bore dimensions, Lb and Ls are generally quite long, directly affecting the reliability of the gearbox. While L1, L2, and Ln do not affect the gearbox's strength, they increase the axial dimension and weight of the output assembly. In summary, the output assembly of existing gearboxes is large in size and weight, and has high cost. The aforementioned width dimensions are all along the axial direction of the output shaft.

[0037] Furthermore, in existing technologies, the mounting housing of yaw and pitch gearboxes is generally an irregularly shaped structure, manufactured using castings. This is because the mounting dimensions (such as...) Figure 1 The variable dimensions (including installation names) result in a large number of constantly evolving installation housing and mold specifications. Even for prototypes and small batches, mold production is required, leading to long production cycles and high production and management costs. Furthermore, the installation housing is a one-piece structure, and dimensions such as the installation stop dimensions, installation pitch circle dimensions, installation outer circle dimensions, installation distance dimensions, and installation thickness dimensions (all dimensions indicated by the installation name) must match the actuators to be installed. Since these dimensions are integrated into the installation housing, any change in any dimension necessitates a complete redesign of the installation housing, resulting in high mold costs, long lead times, and reduced efficiency.

[0038] Furthermore, in the existing technology, the skeleton oil seal 07 is located between two tapered roller bearings, making maintenance and replacement inconvenient after the skeleton oil seal fails. Also, the side of the skeleton oil seal closest to the gearbox needs to be solid or filled with lubricating oil, which increases both the overall weight and manufacturing cost.

[0039] In view of this, the designers have provided a gearbox output structure that can reduce the axial dimension of the overall structure, reduce weight, and lower cost.

[0040] Please combine Figure 2 In this embodiment, it should be noted that the gearbox output structure is installed and fitted with the gearbox housing assembly, and the gearbox power is transmitted to the gearbox output structure and then output through the planetary transmission assembly. The gearbox housing assembly includes a gear ring 001, and the planetary transmission assembly can be a single-stage or multi-stage transmission. This embodiment uses a single-stage output as an example. The planetary transmission assembly includes planetary gears 002 that mesh with the gear ring 001.

[0041] In this embodiment, the gearbox output structure includes a mounting housing 100, an output shaft 200, a bearing, and an output planetary carrier 500. The mounting housing 100 is used to connect with the gear ring 001 of the gearbox housing assembly. One end of the output shaft 200 is provided with an assembly inner hole 201. The inner ring of the bearing is sleeved on the outside of the output shaft 200 and fixedly connected to the output shaft 200. The outer ring of the bearing is fixed on the mounting housing 100 so that the output shaft 200 and the mounting housing 100 can be rotatably engaged. The output planetary carrier 500 is inserted into the assembly inner hole 201 and the two are relatively fixed in the circumferential direction of the output shaft 200.

[0042] The gearbox output structure provided in this embodiment has at least the following advantages:

[0043] By providing an inner mounting hole 201 at the end of the output shaft 200, a portion of the output planetary carrier 500 is inserted into the inner mounting hole 201, thus achieving a fixed connection between the output planetary carrier 500 and the output shaft 200. Torque can be transmitted to the output shaft 200 through the output planetary carrier 500. Since the portion of the output planetary carrier 500 is inserted into the inner mounting hole 201, the output planetary carrier 500 occupies the internal space of the output shaft 200 without affecting the use of the external space of the output shaft 200. That is, it does not interfere with the installation space of bearings or other components. The space required by the output planetary carrier 500 and the space of bearings and other components can overlap in the axial direction of the output shaft 200. Therefore, compared with the output shaft of a gearbox in the prior art, the axial dimension of the output shaft 200 in this embodiment is shorter, resulting in a smaller overall size, lighter weight, and lower manufacturing costs for the gearbox assembly in the axial direction of the output shaft 200. In other words, compared with the prior art, this embodiment eliminates the need for the spline fit length Ls, eliminating the need to design or consider the spline fit length Ls in the axial direction of the output shaft 200, thereby reducing the axial dimension of the output shaft 200. In other words, the output planetary carrier 500 mates with the mounting inner hole 201 without occupying space on the outer circumferential surface of the output shaft 200. Nuts, bearings, and other components can be installed on the shaft portion corresponding to the mounting inner hole 201 on the outer circumferential surface of the output shaft 200. The space required for installing the output planetary carrier 500 overlaps axially with the space required for installing the nut and bearing, and their installation will not interfere with each other.

[0044] Please see Figure 2In this embodiment, the mounting housing 100 is configured as a split structure, meaning the mounting housing comprises multiple connected components, which are processed independently, reducing processing difficulty and facilitating the design of individual component structures. Each component can be designed to be more regular; for example, each component can be a ring structure with a uniform cross-sectional profile. Optionally, the mounting housing 100 includes a mounting flange 110 with a circular cross-section and a lower housing 120 with a circular cross-section. The mounting flange 110 and the lower housing 120 are fixedly connected by bolts or other fasteners and are coaxially arranged. The mounting flange 110 determines the mounting pitch circle size, mounting outer circle size, and mounting thickness size, while the lower housing 120 determines the mounting stop size and mounting distance L. When some of these dimensions are adjusted, only the structural design of the mounting flange 110 and the lower housing 120 needs to be adjusted accordingly, without requiring a complete redesign, thus reducing costs. Meanwhile, both the mounting flange 110 and the lower housing 120 are annular structures with regular shapes, which can be processed using forging, pipe fittings, or ring rolling processes, facilitating manufacturing and further reducing costs. Furthermore, the blank dimensions can be standardized, ensuring high versatility; new product production does not require mold opening, resulting in a short production cycle. In addition, the mounting flange 110 can be fixedly connected to the gear ring 001 of the gearbox housing assembly using bolts or other fasteners. Alternatively, the same bolt can pass through the mounting flange 110, gear ring 001, and lower housing 120 simultaneously, connecting all three.

[0045] In other embodiments, the gear ring 001 may be disposed between the mounting flange 110 and the lower housing 120.

[0046] Please combine Figure 3 and Figure 5 In other embodiments, the mounting housing 100 further includes an adjusting ring 130, which is sleeved around the lower housing 120 and abuts against one side of the mounting flange 110. The adjusting ring 130 can be a split structure or an integral structure. When the adjusting ring is provided, the mounting thickness dimension is determined jointly by the mounting flange 110 and the adjusting ring. The mounting distance dimension L can be determined jointly by the adjusting ring 130 and the lower housing 120. The mounting stop dimension is determined by the adjusting ring 130.

[0047] In this embodiment, optionally, the output shaft 200 is configured as a two-section structure, comprising an integral first shaft section 210 and a second shaft section 220. The axial dimension of the output assembly primarily depends on the first shaft section 210, while the dimension of the second shaft section 220 is adjusted accordingly based on the corresponding actuator. The outer diameter of the first shaft section 210 is smaller than the outer diameter of the second shaft section 220. The connection between the first shaft section 210 and the second shaft section 220 forms an annular abutment surface. In other words, with the first shaft section 210 as a reference, the second shaft section 220 can be understood as a limiting protrusion protruding from the first shaft section 210. Optionally, the mounting inner hole 201 is located on the end face of the first shaft section 210 away from the second shaft section 220. In other embodiments, the output shaft 200 can be configured as a hollow shaft to reduce weight and cost.

[0048] In this embodiment, it should be noted that the number of bearings can be one or more; for example, two bearings will be used for illustration. The inner rings of both bearings are fitted onto the outside of the first shaft segment 210, and the outer rings of both bearings are fixed inside the lower housing 120. A stop 900 is provided between the two bearings to prevent them from approaching each other. For ease of description, the two bearings are designated as a first bearing 300 and a second bearing 400. The inner ring of the first bearing 300 abuts against an annular contact surface. A limiting nut 600 is screwed onto the outside of the first shaft segment 210, and the limiting nut 600 abuts against the inner ring of the second bearing 400. Thus, the position of the two bearings on the first shaft segment 210 is limited by the cooperation of the limiting nut 600 and the second shaft segment 220. It should be understood that in other embodiments, the number of bearings is not limited to two.

[0049] It should be noted that the bearings used in this embodiment are all self-sealing bearings, which eliminates the need for an additional sealing structure at the end of the lower housing 120, thereby reducing the axial dimension of the overall structure.

[0050] Please combine Figure 5 In addition, a spacer ring 1000 can be installed between adjacent bearings, and the distance between the outer rings of adjacent bearings can be controlled by adjusting the size of the spacer ring 1000.

[0051] Please combine Figure 3 and Figure 4In this embodiment, optionally, a portion of the output planetary carrier 500 is inserted into the mounting inner hole 201, and the output planetary carrier 500 and the mounting inner hole 201 are fixedly connected by splines 700, so that the output planetary carrier 500 rotates synchronously with the output shaft 200. There are multiple splines 700, which are evenly spaced along the circumference of the output shaft 200. Further, a step 230 is protruding from the outer circumferential surface of the first shaft segment 210, and the number of steps 230 is the same as the number of splines 700. Multiple steps 230 are evenly spaced along the circumference of the first shaft segment 210, and each step 230 has a gap from the end face of the first shaft segment 210 away from the second shaft segment 220. The splines 700 are interference-fitted with the corresponding steps 230. With this design, the keyway on the first shaft segment 210 only passes through the steps 230 on both sides of the output shaft 200 in the axial direction, and does not extend to the end face of the first shaft segment 210 away from the second shaft segment 220, which makes it convenient to set a sealing structure between the first shaft segment 210 and the output planetary carrier 500.

[0052] In this embodiment, to prevent oil leakage from the gearbox housing assembly into the lower housing 120, an oil seal assembly 800 is provided between the mounting housing 100 and the output shaft 200. In one embodiment, the oil seal assembly 800 is located between the mounting flange 110 and the output planetary carrier 500. Simultaneously, multiple bearings are located on the same side of the oil seal assembly 800, i.e., on the side away from the gearbox housing assembly. The oil inside the gearbox housing assembly is blocked by the oil seal assembly 800, making it difficult for it to pass through the oil seal assembly 800 and enter the lower housing 120. Thus, in the lower housing 120, an annular first cavity 121 is defined axially by the oil seal assembly 800 and the second bearing 400. The first cavity 121 does not need to be filled with oil, thereby reducing costs. In other words, in the prior art, because some bearings are located on the side of the oil seal assembly 800 closer to the gearbox housing assembly, installing these bearings requires occupying part of the mounting housing space, which needs to be filled with oil. In this embodiment, multiple bearings are located on the side of the oil seal assembly 800 away from the gearbox housing assembly. No oil needs to be filled in any space where the bearings are installed, thus saving oil and reducing costs.

[0053] In other embodiments, the oil seal assembly 800 may also be disposed between the mounting flange 110 and the limit nut 600. Alternatively, the oil seal assembly 800 may be disposed between the lower housing 120 and the limit nut 600.

[0054] It should be noted that the position design of the oil seal assembly 800 in this embodiment facilitates maintenance and replacement. Specifically, since multiple bearings are located on the same side of the output shaft 200 along the axial direction of the oil seal assembly 800, and the oil seal assembly 800 is located close to the gearbox housing assembly, when the oil seal assembly 800 needs to be replaced, the gearbox housing assembly and mounting flange 110 are disassembled, and then the transmission structure consisting of the output planetary carrier 500 and the planetary gear 002 is disassembled. There is no need to disassemble the bearings, simplifying the operation and reducing the difficulty.

[0055] Please combine Figure 3 or Figure 5 In other embodiments, optionally, the output planetary carrier 500 is provided with a first weight-reducing hole 510, and a sealing plate 520 is installed on the side of the output planetary carrier 500 away from the output shaft 200, with a first sealing ring 530 between the sealing plate 520 and the output planetary carrier 500. Simultaneously, the output shaft 200 may also be provided with a second weight-reducing hole 221 communicating with the mounting inner hole 201, and the second weight-reducing hole 221 communicating with the first weight-reducing hole 510. When the oil seal assembly 800 and the limit nut 600 cooperate to achieve a seal, since there is a gap between the output planetary carrier 500 and the end of the output shaft 200, in order to prevent oil leakage from the second weight reduction hole 221, a second sealing ring 540 is provided between the assembly inner hole 201 and the output planetary carrier 500. The second sealing ring 540 is located on the side of the step 230 away from the second shaft section 220. Thus, multiple splines 700 and keyways are all located on the side of the second sealing ring 540 away from the gearbox housing assembly. When the oil is blocked by the oil seal assembly 800 and is located between the joint of the output planetary carrier 500 and the assembly inner hole 201, the oil reaches the second sealing ring 540 and is blocked by the second sealing ring 540, making it difficult to leak to the splines 700 and the second weight reduction hole 221.

[0056] It should be understood that, due to the design of the assembly inner hole 201, the output planetary carrier 500 and the output shaft 200 together define the second cavity 550 at the assembly inner hole 201. In this way, not only is the hidden assembly of the output planetary carrier 500 and the output shaft 200 achieved, but the second cavity 550 does not need to be filled with oil, and it also has the effect of reducing weight.

[0057] In summary, the dimensions of the gearbox output structure provided in this embodiment can be determined in the following way:

[0058] 1. Method for determining the installation distance L:

[0059] Direct reference Figure 2 Medium structural dimensions;

[0060] like Figure 3 Adjustments can be made by adding an integral adjustment ring, or as follows: Figure 4 Add a split-type adjustment ring for adjustment;

[0061] like Figure 4 In the middle, adjust the length of the mounting box and the spacer ring;

[0062] like Figure 4 In the middle, the mounting flange and adjusting ring are moved to the rear of the gear ring.

[0063] 2. Method for determining the installation stop:

[0064] Direct reference Figure 2 Structural dimensions;

[0065] Increase Figure 3 integral adjustment ring or Figure 4 Adjust using the split-type adjustment ring;

[0066] 3. Other installation dimensions (such as installation pitch circle, installation outer circle, and installation thickness) can be obtained by adjusting the dimensions of the installation flange.

[0067] The gearbox output structure provided in this embodiment eliminates the need for the spline fit length Ls and spline retraction length L1 by employing an embedded mating structure between the output planetary carrier and the output shaft. By using self-sealing bearings, an end seal structure is unnecessary at the end of the mounting housing, thus eliminating the need for the seal width L2. Since the oil seal assembly 800 is not located between the two bearings, the bearing pair width Lb is reduced, effectively decreasing the overall axial dimension, lightening the overall weight, and saving manufacturing costs. Furthermore, the use of a split mounting housing optimizes the structure and forming method, significantly reducing the number of blank specifications and models, enabling blank inventory, greatly reducing production and management costs, and shortening the production cycle. It also improves the maintainability of the gearbox, reducing repair cycles and costs.

[0068] This embodiment also provides a gearbox assembly, including a gearbox housing assembly, a planetary transmission assembly, and the aforementioned gearbox output structure. The gearbox housing assembly is connected to the mounting housing 100. The planetary transmission assembly can be a multi-stage transmission, and is connected to the output planetary carrier 500. It should be understood that the output planetary carrier 500 can also be understood as a component of the planetary transmission assembly.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A gearbox output structure, characterized in that, include: The assembly includes a housing, an output shaft, bearings, and an output planetary carrier. The housing is used to connect to the gearbox housing assembly. One end of the output shaft has an inner mounting hole. The inner ring of the bearing is fitted onto the output shaft and fixedly connected to it. The outer ring of the bearing is fixed to the housing so that the output shaft and the housing can be rotatably fitted together. The output planetary carrier is inserted into the inner mounting hole, and the two are fixed relative to each other in the circumferential direction of the output shaft. The output planetary carrier has a first weight-reduction hole on the side away from the assembly inner hole, and a sealing plate is provided on the output planetary carrier to close the first weight-reduction hole; the output shaft has a second weight-reduction hole communicating with the assembly inner hole, and a sealing ring is provided between the assembly inner hole and the output planetary carrier; A first sealing ring is provided between the sealing plate and the output planetary carrier; The wall of the first weight-reducing hole has a slope, which extends to the port of the first weight-reducing hole near the second weight-reducing hole; The gearbox output structure also includes an oil seal assembly, which is located between the output planetary carrier and the mounting housing. There are multiple bearings, and all of the multiple bearings are located on the same side of the oil seal assembly. The oil seal assembly and the second bearing among the multiple bearings together define an annular first cavity, which does not need to be filled with oil.

2. The gearbox output structure according to claim 1, characterized in that: The outer circumferential surface of the output shaft is provided with a limiting protrusion, and the inner ring abuts against the limiting protrusion on one side of the output shaft along the axial direction; a limiting nut is screwed onto the outer side of the output shaft, and the limiting nut abuts against the side of the inner ring away from the limiting protrusion.

3. The gearbox output structure according to claim 1, characterized in that: The mounting box is designed as a split structure.

4. The gearbox output structure according to claim 3, characterized in that: The mounting housing includes a connected mounting flange and a mounting housing. The mounting flange is used to connect to the gearbox housing assembly, and the outer ring of the bearing is fixed inside the mounting housing.

5. The gearbox output structure according to claim 4, characterized in that: The mounting housing also includes an adjusting ring, which is connected to both the mounting flange and the mounting housing, and is used to adjust the axial dimension of the mounting flange on the output shaft.

6. The gearbox output structure according to claim 1, characterized in that: The bearing is configured as a self-sealing bearing.

7. A gearbox assembly, characterized in that, include: The gearbox housing assembly, the planetary transmission assembly, and the gearbox output structure according to any one of claims 1-6, wherein the gearbox housing assembly is connected to the mounting housing, the planetary transmission assembly is installed inside the gearbox housing assembly, and the planetary transmission assembly is connected to the output planetary carrier.

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