Gearbox output assembly

Abstract

A gearbox output assembly, relating to the field of gearbox technology, includes a housing, an output shaft, a planetary carrier, a radial support bearing, and two axial support bearings. The planetary carrier is sleeved around the output shaft, and the planetary carrier and output shaft are fixedly connected. The planetary carrier and output shaft are rotatably fitted to the housing via the radial support bearing and the two axial support bearings. The two axial support bearings are spaced apart along the axial direction of the output shaft. The radial support bearings are supported between the housing and the planetary carrier or between the housing and the output shaft, and their rotation axes are parallel to the axis of the output shaft. The two axial support bearings are respectively supported between the housing and the planetary carrier and between the housing and the output shaft, with each axial support bearing having an angle with the axis of the output shaft. At least one bearing overlaps with the planetary carrier along the axial direction of the output shaft. This design reduces axial dimensions, overall size and weight, and manufacturing costs.

Description

Technical Field

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

[0002] Please combine Figure 1 In the traditional gearbox, especially the yaw and pitch gearbox, the output shaft 8 is fixed to the support housing 6 by tapered roller bearings 4 and 7. The output shaft and bearings are pre-tightened by round nuts 3. The last stage planetary carrier 1 is connected to the output shaft 8 by splines to transmit power, and the shaft retaining ring 2 is used for axial positioning. An oil seal 5 is installed between the two bearings on the output shaft to separate the oil lubrication chamber and the grease lubrication chamber. This type of output structure is a common structural form of yaw and pitch gearboxes.

[0003] The inventors discovered that the gearbox output of the related technology has at least the following drawbacks: To ensure bearing strength, the two tapered bearings have a large axial span, and the area between the bearings only has an oil seal structure, which does not make full use of the structural space; the long axial dimension leads to an increase in the weight and cost of the gearbox. Summary of the Invention

[0004] The objectives of this invention include, for example, providing a gearbox output assembly that can reduce axial dimensions, decrease overall size and weight, and lower manufacturing costs.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a gearbox output assembly, comprising: The system comprises a housing, an output shaft, a planetary carrier, a radial support bearing, and two axial support bearings. The planetary carrier is sleeved around the output shaft, and the planetary carrier and the output shaft are fixedly connected. The planetary carrier and the output shaft are rotatably engaged with the housing via the radial support bearing and the two axial support bearings. The two axial support bearings are spaced apart along the axial direction of the output shaft and are fixed relative to the housing in the axial direction of the output shaft. The radial support bearing is located between the two axial support bearings and is fixed relative to the housing in the radial direction of the output shaft. The radial support bearing is supported between the housing and the planetary carrier or between the housing and the output shaft, and the rotation axis of the radial support bearing is parallel to the axis of the output shaft; the two axial support bearings are respectively supported between the housing and the planetary carrier and between the housing and the output shaft, and the rotation axis of each axial support bearing is at an angle to the axis of the output shaft, and at least one of the radial support bearings and the two axial support bearings overlaps with the planetary carrier in the axial direction of the output shaft.

[0006] In an optional embodiment, the planetary carrier is provided with a mounting hole, and the output shaft is provided with a connecting key, which is inserted into the mounting hole; at least one of the radial support bearing and the two axial support bearings overlaps with the mounting hole in the axial direction of the output shaft.

[0007] In an optional embodiment, the connecting key is configured as an involute spline, or / and the spline teeth of the connecting key extend in a direction parallel to the extension direction of the axis of the output shaft.

[0008] In an optional embodiment, the gearbox output assembly further includes a sealing ring clamped between the output shaft and the planetary carrier, the sealing ring being located on the side of the mounting hole near the end of the output shaft extending out of the housing.

[0009] In an optional embodiment, the radial support bearing and the two axial support bearings both overlap the planetary carrier in the axial direction of the output shaft.

[0010] In an optional embodiment, a mounting protrusion is provided inside the housing. The mounting protrusion has an outer annular surface, an inner annular surface, and an inner circumferential annular surface. The outer annular surface and the inner annular surface are arranged opposite to each other in their own axial direction. The inner circumferential annular surface is connected between the outer annular surface and the inner annular surface. The radial support bearing is installed between the planetary carrier and the inner circumferential annular surface; The two axial support bearings are respectively installed between the outer annular surface and the output shaft, and between the inner annular surface and the planetary carrier.

[0011] In an optional embodiment, the gearbox output assembly further includes an inner support seat, which is sleeved on the planetary carrier and engages with the inner annular surface to clamp the corresponding axial support bearing. Or / and, the gearbox output assembly further includes an outer support seat, which is sleeved on the planetary carrier and engages with the outer annular surface to clamp the corresponding axial support bearing.

[0012] In an optional embodiment, the output shaft is provided with a first shoulder, which cooperates with the housing to clamp the corresponding axial support bearing; The planetary carrier is provided with a second shoulder, which cooperates with the housing to clamp the corresponding axial support bearing; The gearbox output assembly also includes a fastener, which is fixedly connected to the output shaft and located on the side of the planetary carrier away from the first shoulder; the fastener cooperates with the first shoulder to clamp the housing, the planetary carrier and the two axial support bearings.

[0013] In an optional embodiment, the gearbox output assembly further includes an oil seal and a grease seal. The oil seal is installed between the outer peripheral surface of the second shoulder and the housing, and the grease seal is installed between the housing and the output shaft. The radial support bearing and the two axial support bearings are both located within the sealing area formed by the oil seal and the grease seal.

[0014] In an optional embodiment, the gearbox output assembly further includes an oil seal installed between the housing and the output shaft.

[0015] In an optional embodiment, there are two radial support bearings, which are arranged side by side and both are supported between the housing and the planetary carrier.

[0016] In an optional embodiment, the radial support bearing and / or the axial support bearing includes a plurality of rolling elements, the axes of the plurality of rolling elements of the radial support bearing being parallel to the axis of the output shaft, and the plurality of rolling elements of the radial support bearing being arranged at intervals around the axis of the output shaft; the axes of the plurality of rolling elements of the same axial support bearing are all perpendicular to the axis of the output shaft, and the plurality of rolling elements of the same axial support bearing are arranged radially around the axis of the output shaft.

[0017] In an optional embodiment, the inner ring of the radial support bearing is integrally formed with the planetary carrier, and / or the outer ring of the radial support bearing is integrally formed with the housing.

[0018] In an optional embodiment, the inner ring of the axial support bearing is integrally formed with the housing, and / or the outer ring of the axial support bearing is integrally formed with the planetary carrier or the output shaft.

[0019] In an optional embodiment, the output shaft is provided with a weight reduction hole.

[0020] The beneficial effects of the embodiments of the present invention include, for example: The gearbox output assembly provided in this embodiment uses a radial support bearing to bear radial force and two axial support bearings to bear axial force. The radial support bearing is located between the two axial support bearings, and the three bearing positions provide good support, strong load-bearing capacity of the output shaft, and high operational stability. Simultaneously, at least one of the radial support bearings and the two axial support bearings overlaps with the planetary carrier in the axial direction of the output shaft. That is, at least one bearing is located on the planetary carrier, and the overlapping installation positions of the bearings and the planetary carrier in the axial direction of the output shaft eliminate the need to reserve space for bearing installation in the axial direction of the output shaft. This shortens the axial dimension of the output shaft, reduces the overall axial dimension of the machine, decreases the overall machine size and weight, and lowers the overall manufacturing cost. 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 output end of a gearbox in the prior art; Figure 2 This is a schematic diagram of the gearbox output assembly provided in this embodiment; Figure 3 This is an exploded view of a portion of the structure of the gearbox output assembly provided in this embodiment. Figure 4 This is a schematic diagram of the first deformed structure of the gearbox output assembly provided in this embodiment; Figure 5 This is a schematic diagram of the second modified structure of the gearbox output assembly provided in this embodiment; Figure 6 This is a schematic diagram of the third modified structure of the gearbox output assembly provided in this embodiment; Figure 7 This is a schematic diagram of the fourth modified structure of the gearbox output assembly provided in this embodiment; Figure 8 This is a schematic diagram of the fifth modified structure of the gearbox output assembly provided in this embodiment.

[0023] icon: 100 - Housing; 110 - Mounting convex ring; 111 - Outer annular surface; 112 - Inner annular surface; 113 - Inner circumferential annular surface; 114 - Annular sealing groove; 200 - Output shaft; 210 - Connecting shaft section; 220 - Sealing shaft section; 230 - First shoulder; 240 - Weight reduction hole; 250 - Step; 300 - Planetary carrier; 310 - Assembly hole; 320 - Sealing hole; 330 - Second shoulder; 400 - Radial support bearing; 500 - First axial support bearing; 600 - Second axial support bearing; 700 - Inner support seat; 710 - Outer support seat; 800 - Fastener; 900 - Sealing ring; 910 - Oil seal; 920 - Grease seal; 930 - Support component. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, 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.

[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0030] Please refer to Figure 2 This embodiment provides a gearbox output assembly, which includes a housing 100, an output shaft 200, a planetary carrier 300, a radial support bearing 400, and two axial support bearings. The planetary carrier 300 is sleeved on the output shaft 200, and the planetary carrier 300 and the output shaft 200 are fixedly connected. The planetary carrier 300 and the output shaft 200 are rotatably engaged with the housing 100 via the radial support bearing 400 and the two axial support bearings. The two axial support bearings are spaced apart along the axial direction of the output shaft 200 and are fixed relative to the housing 100 along the axial direction of the output shaft 200. The radial support bearing 400 is located between the two axial support bearings and is fixed relative to the housing 100 in the radial direction of the output shaft 200. The radial support bearing 400 is supported between the housing 100 and the planetary carrier 300 or between the housing 100 and the output shaft 200, and the rotation axis of the radial support bearing 400 is parallel to the axis of the output shaft 200. Two axial support bearings are respectively supported between housing 100 and planetary carrier 300 and between housing 100 and output shaft 200. The rotation axis of each axial support bearing is at an angle to the axis of output shaft 200. Radial support bearing 400 and at least one of the two axial support bearings overlap with planetary carrier 300 in the axial direction of output shaft 200.

[0031] As described above, the working principle of the gearbox output assembly provided in this embodiment is as follows: Power equipment, such as a motor assembly, is connected to the input section of the gearbox. After torque adjustment, it is output from the planetary carrier 300, which drives the output shaft 200 to rotate. Finally, the output shaft 200 outputs the torque to the corresponding actuator. During equipment operation, radial force is borne by the radial support bearing 400, and axial force is borne by the cooperation of two axial support bearings. Furthermore, the radial support bearing 400 is located between the two axial support bearings. The cooperation of the bearings in these three positions provides good support, strong load-bearing capacity of the output shaft 200, and high operational stability.

[0032] It should be understood that the radial support bearing 400 and at least one of the two axial support bearings overlap with the planetary carrier 300 in the axial direction of the output shaft 200. That is, at least one bearing is located on the planetary carrier 300, and the mounting positions of the bearing and the planetary carrier 300 in the axial direction of the output shaft 200 overlap. This eliminates the need to reserve space for mounting the bearing in the axial direction of the output shaft 200, thereby shortening the axial dimension of the output shaft 200, reducing the overall axial dimension of the machine, reducing the overall volume and weight of the machine, and lowering the overall manufacturing cost.

[0033] It should be noted that the gearbox output assembly provided in this embodiment can be applied to, but is not limited to, yaw and pitch gearboxes.

[0034] The following embodiments illustrate the details of the gearbox output assembly of this application by way of example.

[0035] Please refer to Figures 2-8 In this embodiment, optionally, the gearbox output assembly includes a housing 100, an output shaft 200, a planetary carrier 300, a radial support bearing 400, a first axial support bearing 500, a second axial support bearing 600, an inner support seat 700, an outer support seat 710, a fastener 800, a sealing ring 900, an oil seal 910, and a grease seal 920. The output shaft 200 and the planetary carrier 300 are fixedly connected and pass through the housing 100. One end of the output shaft 200 extends out of the housing 100. The output shaft 200 and the planetary carrier 300 are supported by the radial support bearing 400, the first axial support bearing 500, and the second axial support bearing 600, and can rotate relative to the housing 100. The inner support seat 700 and the outer support seat 710 are both sleeved on the outside of the planetary carrier 300, and together with the housing 100, they clamp the first axial support bearing and the second axial support bearing 600. Fastener 800 connects to output shaft 200, and the two work together to lock housing 100, planetary carrier 300, radial support bearing 400, first axial support bearing 500, second axial support bearing 600, inner support seat 700, and outer support seat 710 onto output shaft 200, thereby fixing housing 100, planetary carrier 300, radial support bearing 400, first axial support bearing 500, second axial support bearing 600, inner support seat 700, and outer support seat 710 axially relative to output shaft 200. Sealing ring 900 is installed between planetary carrier 300 and output shaft 200, oil seal 910 is installed between housing 100 and planetary carrier 300, and grease seal 920 is installed between housing 100 and output shaft 200. Radial support bearing 400, first axial support bearing 500, and second axial support bearing 600 are located within the sealing area defined by oil seal 910 and grease seal 920. The oil seal 910 and the grease seal 920 define a grease lubrication area. The lubricating oil inside the housing 100 is blocked by the sealing ring 900 and the oil seal 910, making it difficult for it to enter the locations of the radial support bearing 400, the first axial support bearing 500, and the second axial support bearing 600. Meanwhile, the grease is blocked by the grease seal 920, making it difficult for it to leak outside the housing 100.

[0036] Please refer to Figure 3Optionally, a mounting protrusion 110 is provided inside the housing 100. The mounting protrusion 110 is a circular ring and has an outer annular surface 111, an inner annular surface 112, and an inner circumferential surface 113. The outer annular surface 111 and the inner annular surface 112 are arranged opposite to each other in their own axial direction, and the inner circumferential surface 113 connects the outer annular surface 111 and the inner annular surface 112. The outer annular surface 111 can also be the outer end face of the housing 100, with one end of the output shaft 200 extending out of the outer annular surface 111.

[0037] Furthermore, an annular sealing groove 114 can be provided on the outer annular surface 111.

[0038] Please refer to Figure 3 Optionally, the output shaft 200 includes an integrally formed connecting shaft section 210, a sealing shaft section 220, and a first shoulder 230 arranged sequentially. The outer circumferential surface of the connecting shaft section 210 is provided with a threaded groove and a connecting key, with the threaded groove located on the side of the connecting key away from the sealing shaft section 220. Furthermore, the connecting key can be configured as an involute spline, with the spline teeth extending parallel to the axis of the output shaft 200, facilitating machining, improving the connection strength, and enhancing positioning accuracy. The outer diameter of the sealing shaft section 220 is larger than the outer diameter of the connecting shaft section 210 but smaller than the outer diameter of the first shoulder 230. After the output shaft 200 is assembled within the housing 100, a portion of the sealing shaft section 220 and the first shoulder 230 extend beyond the housing 100.

[0039] Furthermore, a weight-reducing hole 240 is provided on the outer end face of the output shaft 200. The weight-reducing hole 240 can be a blind hole or a variable diameter hole, which can reduce weight while ensuring that the structural strength of the output shaft 200 meets the requirements. At the same time, since the weight-reducing hole 240 is a blind hole, oil is not easily leaked out from the weight-reducing hole 240.

[0040] Furthermore, the outer peripheral surface of the first shoulder 230 can be provided with external teeth, which can mesh with the actuator to transmit torque. That is, the output shaft 200 can be a gear shaft.

[0041] It should be understood that in other embodiments, the number of weight-reducing holes 240 can be multiple, and the weight-reducing holes 240 can also be through holes, etc.

[0042] Please refer to Figure 3 Optionally, the planetary carrier 300 is provided with a mounting hole 310 and a sealing hole 320, which are coaxial and connected. The diameter of the sealing hole 320 is larger than the diameter of the mounting hole 310. The mounting hole 310 can be a spline hole. Additionally, a second shoulder 330 is provided on the outer circumferential surface of the planetary carrier 300.

[0043] Optionally, the inner support 700 is provided with a first positioning groove, and the outer support 710 is provided with a second positioning groove. Both the first positioning groove and the second positioning groove can be annular grooves.

[0044] The assembly structure of the gearbox output assembly provided in this embodiment is as follows: Please refer to Figure 2 The output shaft 200 passes through the planetary carrier 300. A connecting key on the output shaft 200 engages with the mounting hole 310. The sealing shaft section 220 fits against the wall of the sealing hole 320. A sealing ring 900 is clamped between the sealing shaft section 220 and the wall of the sealing hole 320. The end face of the first shoulder 230 of the output shaft 200 extends out of the housing 100. Both the inner support seat 700 and the outer support seat 710 are sleeved on the planetary carrier 300 and located on the side of the second shoulder 330 near the first shoulder 230. A mounting convex ring 110 is located between the inner support seat 700 and the outer support seat 710. The radial support bearing 400 is clamped between the inner circumferential surface 113 of the mounting convex ring 110 and the planetary carrier 300, achieving radial positioning of the radial support bearing 400. The inner support seat 700 and the outer support seat 710 cooperate to clamp the radial support bearing 400, achieving axial positioning of the radial support bearing 400. The first axial support bearing 500 is located in the first positioning groove. The inner support seat 700 and the inner ring surface 112 cooperate to clamp the first axial support bearing 500. The second axial support bearing 600 is located in the second positioning groove. The outer support seat 710 and the outer ring surface 111 cooperate to clamp the second axial support bearing 600. Through the cooperation of the inner support seat 700, the outer support seat 710 and the housing 100, the radial and axial positioning of the first axial support bearing 500 and the second axial support bearing 600 can be realized. Meanwhile, fastener 800 is screwed onto the threaded groove of output shaft 200. By tightening fastener 800, the planetary carrier 300, inner support seat 700, first axial support bearing 500, housing 100, second axial support bearing 600, and outer support seat 710 can be pushed closer to the first shoulder 230, so that the outer support seat 710 contacts the first shoulder 230. The fastener 800 and the first shoulder 230 cooperate to clamp the planetary carrier 300, inner support seat 700, first axial support bearing 500, housing 100, second axial support bearing 600, and outer support seat 710, locking the axial position. The axial locking requires few parts, has a simple structure, and is low in cost. Oil seal 910 is sleeved on the outside of planetary carrier 300, and oil seal 910 simultaneously contacts the outer peripheral surface of second shoulder 33 and the inner peripheral surface of housing 100. The grease seal 920 can be sleeved on the output shaft 200. The grease seal 920 can be clamped between the outer support 710 and the first shaft shoulder 230. At the same time, the sealing edge of the grease seal 920 can be embedded in the annular sealing groove 114 on the outer ring surface 111 to achieve contact sealing.

[0045] After installation, the radial support bearing 400 is located between the first axial support bearing 500 and the second axial support bearing 600. The rotation axis of the radial support bearing 400 is parallel to the axis of the output shaft 200. The rotation axes of the first axial support bearing 500 and the second axial support bearing 600 are both perpendicular to the axis of the output shaft 200. In other words, the angle between the rotation axis of the first axial support bearing 500 and the axis of the output shaft 200, and the angle between the rotation axis of the second axial support bearing 600 and the axis of the output shaft 200, are both 90°.

[0046] Please combine Figure 8 It should be noted that the angle between the rotation axis of the axial support bearing and the axis of the output shaft 200 is α, and the value of α is between 60° and 90°. For example, the angle between the rotation axis of the axial support bearing and the axis of the output shaft can be 60°, 75° or 90°, etc. That is, the rotation axis of the first axial support bearing 500 or / and the rotation axis of the second axial support bearing 600 are not necessarily perpendicular to the axis of the output shaft 200.

[0047] It should be noted that the sealing ring 900 can be a sealing ring, and the fastener 800 can be a nut.

[0048] Please refer to Figure 2 It should be understood that the inner support seat 700 and the outer support seat 710 can be configured to have the same structure and be arranged symmetrically. Furthermore, the first axial support bearing 500 and the second axial support bearing 600 can be arranged symmetrically relative to the radial support bearing 400, resulting in more stable force distribution.

[0049] Please refer to Figure 4 It should be understood that in some embodiments, the inner support seat 700 can be omitted, and the first axial support bearing 500 can be directly clamped by the second shoulder 330 and the inner annular surface 112. Alternatively, the outer support seat 710 can be omitted, and the second axial support bearing 600 can be directly clamped by the first shoulder 230 and the outer annular surface 111. Alternatively, both the inner support seat 700 and the outer support seat 710 can be omitted. In this way, the axial dimension can be further reduced.

[0050] Please refer to Figure 5 It should be noted that in some embodiments, the second axial support bearing 600 can be located on the outside of the planetary carrier 300, that is, the second axial support bearing 600 is not located on the planetary carrier 300 and does not overlap with the planetary carrier 300 in the axial direction of the output shaft 200. In this case, a step 250 can be provided between the sealed shaft section 220 and the first shaft shoulder 230. The second axial support bearing 600 is installed on the step 250, and the second axial support bearing 600 is clamped by the housing 100 and the first shaft shoulder 230, which also has the effect of reducing the axial dimension of the whole machine.

[0051] Please refer to Figure 6 In some embodiments, the number of radial support bearings 400 is optional, not limited to one, but can also be multiple. For example, the number of radial support bearings 400 can also be two. The two radial support bearings 400 are arranged side-by-side, and a spacer ring can be provided between the two radial support bearings 400 to improve support stability. Furthermore, both radial support bearings 400 can be located between the first axial support bearing 500 and the second axial support bearing 600.

[0052] In some embodiments, optionally, both the radial support bearing 400 and the two axial support bearings may include multiple rolling elements, which can be cylinders or spheres, etc., resulting in a simple structure and low cost. Specifically, the axis of the rolling element of the radial support bearing 400 is parallel to the axis of the output shaft 200, and the multiple rolling elements of the radial support bearing 400 are arranged at intervals around the axis of the output shaft 200. The axis of the rolling element of the same axial support bearing is perpendicular to the axis of the output shaft 200, and the multiple rolling elements of the same axial support bearing are arranged radially around the axis of the output shaft 200. It should be understood that the number and size of the rolling elements of the radial support bearing 400 and the two axial support bearings are designed as needed. For example, in this embodiment, the diameter of the rolling element of the radial support bearing 400 is larger than the diameter of the rolling elements of the two axial support bearings, and the rolling element dimensions of the two axial support bearings are equal.

[0053] In some embodiments, the inner ring of the radial support bearing 400 is integrally formed with the planetary carrier 300, and / or the outer ring of the radial support bearing 400 is integrally formed with the housing 100, which can reduce processing and manufacturing costs.

[0054] In some embodiments, the inner ring of the axial support bearing is integrally formed with the housing 100, and / or the outer ring of the axial support bearing is integrally formed with the planetary carrier 300 or the output shaft 200, which can reduce manufacturing costs.

[0055] Please refer to Figure 7 In some embodiments, optionally, an oil seal 910 may be provided only between the output shaft 200 and the housing 100, omitting the sealing ring 900 and the grease seal 920, and directly utilizing the lubricating oil inside the housing 100 to lubricate the radial support bearing 400 and the axial support bearing. In this structure, a support member 930, which is annular, can be installed on the outer annular surface 111 of the housing 100. The oil seal 910 is located within the support member 930, and the support member 930 and the output shaft 200 cooperate to clamp the oil seal 910. This reduces the number of seals and lowers costs.

[0056] It should be understood that the oil seal 910 in this embodiment can be a skeleton oil seal, etc., and the grease seal 920 can be a metal sealing ring, etc.

[0057] The gearbox output assembly provided in this embodiment can shorten the axial dimension of the output shaft 200, reduce the overall axial dimension and volume of the machine, improve the compactness of the overall structure, and reduce the cost of the gearbox by placing some or all of the bearings outside the planetary carrier 300.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A gearbox output assembly, characterized by, include: The system comprises a housing (100), an output shaft (200), a planetary carrier (300), a radial support bearing (400), and two axial support bearings. The planetary carrier (300) is sleeved around the output shaft (200), and the planetary carrier (300) and the output shaft (200) are fixedly connected. The planetary carrier (300) and the output shaft (200) are rotatably engaged with the housing (100) via the radial support bearing (400) and the two axial support bearings. The two axial support bearings are spaced apart along the axial direction of the output shaft (200) and are fixed relative to the housing (100) along the axial direction of the output shaft (200). The radial support bearing (400) is fixed relative to the housing (100) in the radial direction of the output shaft (200). The radial support bearing (400) is supported between the housing (100) and the planetary carrier (300) or between the housing (100) and the output shaft (200), and the rotation axis of the radial support bearing (400) is parallel to the axis of the output shaft (200); the two axial support bearings are respectively supported between the housing (100) and the planetary carrier (300) and between the housing (100) and the output shaft (200), and the rotation axis of each axial support bearing is at an angle to the axis of the output shaft (200), and at least one of the radial support bearings and the two axial support bearings overlaps with the planetary carrier (300) in the axial direction of the output shaft (200).

2. The gearbox output assembly according to claim 1, characterized in that: The planetary carrier (300) is provided with an assembly hole (310), and the output shaft (200) is provided with a connecting key. The connecting key is inserted into the assembly hole (310), and the connecting key and the planetary carrier are fixed relative to each other in the circumferential direction of the assembly hole. At least one of the radial support bearing and the two axial support bearings overlaps with the assembly hole (310) in the axial direction of the output shaft (200).

3. The gearbox output assembly according to claim 2, characterized in that: The gearbox output assembly also includes a sealing ring (900) which is clamped between the output shaft (200) and the planetary carrier (300) and is located on the side of the mounting hole (310) near the end of the output shaft (200) that extends out of the housing (100).

4. The gearbox output assembly according to claim 1, characterized in that: The radial support bearing (400) and the two axial support bearings overlap the planetary carrier (300) axially with the output shaft (200).

5. The gearbox output assembly according to claim 4, characterized in that: The housing (100) is provided with a mounting protrusion (110) inside. The mounting protrusion (110) has an outer ring surface (111), an inner ring surface (112) and an inner circumferential ring surface (113). The outer ring surface (111) and the inner ring surface (112) are arranged opposite to each other in their own axial direction. The inner circumferential ring surface (113) is connected between the outer ring surface (111) and the inner ring surface (112). The radial support bearing (400) is installed between the planetary carrier (300) and the inner circumferential annular surface (113); The two axial support bearings are respectively installed between the outer annular surface (111) and the output shaft (200), and between the inner annular surface (112) and the planetary carrier (300).

6. The gearbox output assembly according to claim 5, characterized in that: The gearbox output assembly also includes an inner support seat (700), which is sleeved on the planet carrier (300). The inner support seat (700) cooperates with the inner annular surface (112) to clamp the corresponding axial support bearing. Or / and, the gearbox output assembly also includes an outer support seat (710), which is sleeved on the planetary carrier (300), and the outer support seat (710) cooperates with the outer ring surface (111) to clamp the corresponding axial support bearing.

7. The gearbox output assembly according to any one of claims 1-6, characterized in that: The output shaft (200) is provided with a first shoulder (230), and the first shoulder (230) and the housing (100) cooperate to clamp the corresponding axial support bearing; The planetary carrier (300) is provided with a second shoulder (330), which cooperates with the housing (100) to clamp the corresponding axial support bearing; The gearbox output assembly also includes a fastener (800), which is fixedly connected to the output shaft (200) and located on the side of the planetary carrier (300) away from the first shoulder (230); the fastener (800) cooperates with the first shoulder (230) to clamp the housing (100), the planetary carrier (300) and the two axial support bearings.

8. The gearbox output assembly according to claim 7, characterized in that: The gearbox output assembly also includes an oil seal (910) and a grease seal (920). The oil seal (910) is installed between the outer peripheral surface of the second shoulder (330) and the housing (100), and the grease seal (920) is installed between the housing (100) and the output shaft (200). The radial support bearing (400) and the two axial support bearings are both located within the sealing area formed by the oil seal (910) and the grease seal (920).

9. The gearbox output assembly according to claim 7, characterized in that: The gearbox output assembly also includes an oil seal (910) installed between the housing (100) and the output shaft (200).

10. The gearbox output assembly according to claim 1, characterized in that: There are two radial support bearings (400), which are arranged side by side and both are supported between the housing (100) and the planetary carrier (300).

11. The gearbox output assembly according to claim 1, characterized in that: The radial support bearing (400) and / or the axial support bearing include a plurality of rolling elements, the axes of the plurality of rolling elements of the radial support bearing (400) being parallel to the axis of the output shaft (200), and the plurality of rolling elements of the radial support bearing (400) being arranged at intervals around the axis of the output shaft (200); the axes of the plurality of rolling elements of the same axial support bearing are all perpendicular to the axis of the output shaft (200), and the plurality of rolling elements of the same axial support bearing are arranged radially around the axis of the output shaft (200).

12. The gearbox output assembly according to claim 1, characterized in that: The inner ring of the radial support bearing (400) is integrally formed with the planetary carrier (300), and / or the outer ring of the radial support bearing (400) is integrally formed with the housing (100).

13. The gearbox output assembly according to claim 1, characterized in that: The inner ring of the axial support bearing is integrally formed with the housing (100), and / or the outer ring of the axial support bearing is integrally formed with the planetary carrier (300) or the output shaft (200).

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