Gearbox assembly

Abstract

A gear box assembly relates to the technical field of mechanical transmission, which comprises a box body, an output gear shaft, a first axial roller assembly, a second axial roller assembly and a radial roller assembly. The output gear shaft is arranged in the box body and rotatably connected with the box body; the first axial roller assembly is arranged outside the output gear shaft and axially fixed relative to the box body; the second axial roller assembly is arranged outside the output gear shaft and axially fixed relative to the box body; the radial roller assembly is arranged outside the output gear shaft, and the radial roller assembly is located between the first axial roller assembly and the second axial roller assembly, and the radial roller assembly is radially fixed relative to the box body. The gear box assembly has the advantages of compact structure, small volume, low manufacturing cost, small size and light weight, and stable and reliable operation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and more specifically, to a gearbox assembly. Background Technology Currently, in some gearbox designs, the output gear shaft and the lower housing are assembled together by the mutual engagement of the inner and outer rings of multiple tapered bearings, with round nuts used for axial fixation of the tapered bearings; a first oil seal is fitted between the output gear shaft and the lower housing; a through cover is fixed to the end of the lower housing; and a second oil seal is installed between the through cover and the output gear shaft.

[0002] The inventors discovered during their research that existing gearboxes have at least the following drawbacks: Using multiple tapered bearings requires a certain axial span to ensure the bearing's safety and strength. Furthermore, multiple tapered bearings require a certain radial space for assembly, resulting in large overall radial and axial dimensions of the gearbox. In addition, each tapered bearing has a large number of parts, making the assembly process cumbersome and inefficient. Utility Model Content

[0003] The purpose of this invention includes, for example, providing a gearbox assembly that simplifies the structure, reduces costs, and improves operational stability.

[0004] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a gearbox assembly, including a gearbox body, an output gear shaft, a first axial roller assembly, a second axial roller assembly, and a radial roller assembly, wherein: The output gear shaft passes through the housing body and is rotatably engaged with the housing body; the first axial roller assembly is sleeved on the output gear shaft and is axially fixed relative to the housing body; the second axial roller assembly is sleeved on the output gear shaft and is axially fixed relative to the housing body; the radial roller assembly is sleeved on the output gear shaft, the radial roller assembly is located between the first axial roller assembly and the second axial roller assembly, and the radial roller assembly is radially fixed relative to the housing body.

[0005] In an optional embodiment, the housing body includes a first housing and a second housing connected together, the roller body of the first axial roller assembly is clamped between the first housing and the second housing; the roller body of the second axial roller assembly is clamped between the second housing and the output gear shaft; and the roller body of the radial roller assembly is clamped between the output gear shaft and the second housing.

[0006] In an optional embodiment, the second housing has a first side and a second side spaced apart axially on the output gear shaft. The first side is provided with a first positioning groove, and the first axial roller assembly is embedded in the first positioning groove. The second side is provided with a second positioning groove, and the second axial roller assembly is embedded in the second positioning groove.

[0007] In an optional embodiment, a limiting shoulder is provided on the outer peripheral surface of the output gear shaft, and the roller body of the second axial roller assembly is clamped between the housing body and the limiting shoulder.

[0008] In an optional embodiment, a limiting nut is screwed onto the outer circumferential surface of the output gear shaft. The limiting nut contacts the side of the housing body away from the limiting shoulder, so that the housing body and the output gear shaft are fixed relative to each other in the axial direction of the output gear shaft.

[0009] In an optional embodiment, a bushing is fitted onto the outer circumferential surface of the output gear shaft, and the bushing cooperates with the housing body to clamp the first axial roller assembly in the axial direction of the output gear shaft; the limiting nut contacts the side of the bushing away from the housing body.

[0010] In an optional embodiment, the housing body is provided with an assembly hole and a lubrication channel, and the output gear shaft passes through the assembly hole; the lubrication channel is provided with a plurality of lubrication flow ports, each of which is connected to the assembly hole.

[0011] In an optional embodiment, at least one lubrication port is provided between the first axial roller assembly and the radial roller assembly; or / and, at least one lubrication port is provided between the second axial roller assembly and the radial roller assembly.

[0012] In an optional embodiment, a third positioning groove is provided on the wall of the assembly hole, and the radial roller assembly is embedded in the third positioning groove.

[0013] In an optional embodiment, the gearbox assembly further includes a first oil seal and a second oil seal, both of which are disposed between the gearbox body and the output gear shaft, and the first axial roller assembly, the second axial roller assembly, and the radial roller assembly are all located between the first oil seal and the second oil seal.

[0014] The beneficial effects of this utility model embodiment include, for example: In summary, the gearbox assembly provided in this embodiment, through the cooperation of the first axial roller assembly, the second axial roller assembly, and the radial roller assembly, can simultaneously withstand axial and radial loads, and is more suitable for the reciprocating rotation of conventional wind turbine independent pitch control strategies. Because the cooperation of the first axial roller assembly, the second axial roller assembly, and the radial roller assembly provides high load-bearing capacity, it can reduce the axial space of the output gear shaft and decrease the radial dimension, thereby reducing the overall size and weight of the gearbox and achieving cost reduction. Furthermore, both the first and second axial roller assemblies rely on the gearbox body and the output gear shaft for support and positioning, while the radial roller assembly relies on the gearbox body for support and positioning, eliminating the need for additional mating inner and outer rings, reducing the number of parts and lowering manufacturing costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model 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.

[0016] Figure 1 This is a schematic diagram of Embodiment 1 of the gearbox assembly according to this application; Figure 2 This is a schematic diagram of Embodiment 2 of the gearbox assembly according to the present application.

[0017] icon: 100 - Housing body; 101 - Lubricating oil passage; 102 - Lubricating flow port; 110 - First housing; 120 - Second housing; 121 - First positioning groove; 122 - Second positioning groove; 123 - Third positioning groove; 130 - Fastening screw; 140 - Sealing ring; 150 - Valve; 200 - Output gear shaft; 210 - Limiting shoulder; 300 - First axial roller assembly; 400 - Second axial roller assembly; 500 - Radial roller assembly; 600 - Limiting nut; 700 - First oil seal; 800 - Second oil seal; 900 - Bushing. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] 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 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 present invention without inventive effort are within the scope of protection of the present invention.

[0020] 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.

[0021] In the description of this utility model, 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 is usually placed during use, they are only for the convenience of describing this utility model 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 utility model.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0024] Example 1 Please refer to Figure 1 This embodiment provides a gearbox assembly, which includes a gearbox body 100, an output gear shaft 200, a first axial roller assembly 300, a second axial roller assembly 400, and a radial roller assembly 500. The output gear shaft 200 passes through the gearbox body 100 and is rotatably engaged with the gearbox body 100; the first axial roller assembly 300 is sleeved on the output gear shaft 200 and is axially fixed relative to the gearbox body 100; the second axial roller assembly 400 is sleeved on the output gear shaft 200 and is axially fixed relative to the gearbox body 100; the radial roller assembly 500 is sleeved on the output gear shaft 200, and is located between the first axial roller assembly 300 and the second axial roller assembly 400, and is radially fixed relative to the gearbox body 100.

[0025] As described above, the gearbox assembly of this embodiment operates as follows: The input shaft of the gearbox assembly can be connected to a motor or electric motor. The torque is adjusted by the speed regulating component inside the gearbox assembly and output from the output gear shaft 200. The output gear shaft 200 can be connected to an actuator, thereby driving the actuator to rotate. During operation, the cooperation of the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500 can simultaneously withstand axial and radial loads, making it more suitable for the reciprocating rotation of conventional wind turbine independent pitch control strategies. Due to the high load-bearing capacity of the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500, the axial space of the output gear shaft 200 can be reduced, and the radial dimension can be decreased, thereby reducing the overall size and weight of the gearbox and achieving cost reduction. Meanwhile, the first axial roller assembly 300 and the second axial roller assembly 400 are both supported and positioned by the housing body 100 and the output gear shaft 200, while the radial roller assembly 500 is supported and positioned by the housing body 100. There is no need to set up additional inner and outer rings that cooperate with each other, which reduces the number of parts and lowers the processing and manufacturing costs.

[0026] The following embodiments illustrate the details of the gearbox assembly of this application by way of example.

[0027] Please combine Figure 1 In this embodiment, optionally, the gearbox assembly includes a gearbox body 100, an output gear shaft 200, a first axial roller assembly 300, a second axial roller assembly 400, a radial roller assembly 500, a limiting nut 600, a first oil seal 700, and a second oil seal 800. The output gear shaft 200 is rotatably connected to the gearbox body 100 through the cooperation of the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500. The limiting nut 600 is installed outside the output gear shaft 200 to restrict the axial movement of the gearbox body 100 relative to the output gear shaft 200. The first oil seal 700 and the second oil seal 800 cooperate to restrict the leakage of lubricating oil between them, ensuring sufficient lubrication of the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500.

[0028] Optionally, the box body 100 can be configured as a split structure. For example, the box body 100 includes a first box body 110, a second box body 120, fastening screws 130 and a sealing ring 140. The first box body 110 and the second box body 120 are joined together, the sealing ring 140 is located between the first box body 110 and the second box body 120, and the fastening screws 130 are connected to both the first box body 110 and the second box body 120 to prevent them from moving away from each other.

[0029] The first housing 110 has a first hole and an axial mounting side thereon. The second housing 120 has a second hole and has a first side and a second side spaced apart axially along the second hole. The first side has an annular first positioning groove 121, with a sealing ring 140 located outside the first positioning groove 121, and a first axial roller assembly 300 embedded in it. The second side has an annular second positioning groove 122, with a second axial roller assembly 400 embedded in it. The second hole has an annular third positioning groove 123 on its wall, with a radial roller assembly 500 embedded in it. When the first housing 110 and the second housing 120 are assembled, the assembly side fits against the first side and contacts the roller body of the first axial roller assembly 300. The first axial roller assembly 300 is clamped and positioned by the assembly side and the groove wall of the first positioning groove 121, so that the first axial roller assembly 300 is fixed relative to the housing body 100 in the axial direction of the second hole, and the first axial roller assembly 300 achieves axial support.

[0030] Due to the design of the first positioning groove 121, the second positioning groove 122, and the third positioning groove 123, the internal space of the gearbox body 100 is rationally utilized, reducing the space occupied by the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500, thus reducing the volume of the gearbox assembly. Specifically, the rotation axis of the roller bodies of the first axial roller assembly 300 and the second axial roller assembly 400 is perpendicular to the axis of the output gear shaft 200; that is, the rotation axis of the roller bodies of both extends radially along the output gear shaft 200. The rotation axis of the roller body of the radial roller assembly 500 is parallel to the axis of the output gear shaft 200.

[0031] In this embodiment, optionally, a limiting shoulder 210 is provided on the outer peripheral surface of the output gear shaft 200. After one end of the output gear shaft 200 passes through the housing body 100, the other end of the output gear shaft 200 is located outside the housing body 100, and the limiting shoulder 210 is close to the end of the output gear shaft 200 that extends out of the housing body 100. At the same time, the limiting shoulder 210 cooperates with the second housing body 120 to clamp the second axial roller assembly 400. The limiting shoulder 210 cooperates with the groove wall of the second positioning groove 122 to clamp the roller body of the second axial roller assembly 400, so that the second axial roller assembly 400 is fixed relative to the output gear shaft 200 and the housing body 100 in the axial direction of the output gear shaft 200.

[0032] Furthermore, the limiting nut 600 is screwed into the output gear shaft 200, and the limiting nut 600 contacts the side of the first housing 110 away from the second housing 120. The limiting nut 600 and the limiting shoulder 210 cooperate to achieve axial limiting of the housing body 100, the first axial roller assembly 300 and the second axial roller assembly 400.

[0033] In this embodiment, optionally, both the first oil seal 700 and the second oil seal 800 are disposed between the gearbox body 100 and the output gear shaft 200. For example, the first oil seal 700 is disposed between the first gearbox body 110 and the output gear shaft 200, and the second oil seal 800 is disposed between the second gearbox body 120 and the output gear shaft 200. The first oil seal 700 and the second oil seal 800 cooperate to clamp the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500, ensuring that the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500 can be effectively lubricated. At the same time, there is no need to reserve space between the roller assemblies for the oil seal, which can shorten the axial dimension of the gearbox assembly.

[0034] Optionally, the structures of the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500 can be identical. Each of these assemblies may include a cage and a plurality of rollers rotatably mounted on the cage. The axes of the rollers in the first axial roller assembly 300 and the second axial roller assembly 400 are parallel and perpendicular to the axis of the output gear shaft 200; the rollers in the radial roller assembly 500 are parallel to the axis of the output gear shaft 200. Furthermore, the diameter of the rollers in the radial roller assembly 500 is larger than the diameter of the rollers in the axial roller assembly.

[0035] The gearbox assembly provided in this embodiment, through the cooperation of the first axial roller assembly 300, the second axial roller assembly 400, and the radial roller assembly 500, can simultaneously withstand axial and radial loads, ensuring stable and reliable gearbox operation. Both the first axial roller assembly 300 and the second axial roller assembly 400 are supported and positioned by the gearbox body 100 and the output gear shaft 200, while the radial roller assembly 500 is supported and positioned by the gearbox body 100. This eliminates the need for additional mating inner and outer rings, reducing the number of parts, lowering manufacturing costs, and also reducing the radial dimension of the gearbox.

[0036] Example 2 Please combine Figure 1 and Figure 2This embodiment also provides a gearbox assembly, which is a further improvement on the technical solution of Embodiment 1. To avoid repetition and redundancy, this embodiment only describes the improved technical solution, and the rest can be referred to the technical solution of Embodiment 1.

[0037] In this embodiment, optionally, the gearbox body 100 is configured as a one-piece structure. The gearbox body 100 has high structural strength, long service life, and reduces the number of assembly steps, thus improving assembly efficiency. The gearbox body 100 is provided with an assembly hole, through which the output gear shaft 200 passes. Similarly, an annular groove for positioning the radial roller assembly 500 is provided on the wall of the assembly hole. The gearbox assembly also includes a bushing 900. The bushing 900 is sleeved on the outside of the output gear shaft 200. The bushing 900 abuts against the side of the housing body 100 away from the output gear shaft 200, and the limiting nut 600 abuts against the side of the bushing 900 away from the limiting shoulder 210. In this way, the bushing 900 and the housing body 100 cooperate to clamp the first axial roller assembly 300, and the limiting nut 600 and the limiting shoulder 210 cooperate to clamp the housing body 100, the first axial roller assembly 300 and the second axial roller assembly 400, thus restricting the axial degrees of freedom of the housing body 100, the first axial roller assembly 300 and the second axial roller assembly 400.

[0038] Optionally, the first oil seal 700 is located between the limit nut 600 and the housing body 100. There is no need to reserve a position on the output gear shaft 200 to install the first oil seal 700. In this way, the axial space of the output gear shaft 200 can be saved and the axial dimension of the output gear shaft 200 can be shortened.

[0039] Optionally, the housing body 100 is provided with a lubricating oil passage 101, and the lubricating oil passage 101 is provided with a plurality of lubricating flow ports 102, each of which is connected to an assembly hole. For example, in this embodiment, at least one lubricating flow port 102 is provided between the first axial roller assembly 300 and the radial roller assembly 500, and at least one lubricating flow port 102 is provided between the second axial roller assembly 400 and the radial roller assembly 500. It should be understood that an addition port communicating with the lubricating oil passage 101 can be provided on the side of the housing body 100. A valve 150 can be provided at the addition port, through which lubricating fluid can be added to the interior, or the lubricating fluid can be drained and replaced for internal cleaning, etc.

[0040] The gearbox assembly provided in this embodiment has a more compact structure and smaller size, which is conducive to lightweight and miniaturization design. At the same time, due to the design of the lubrication channel 101, the lubrication effect of each roller assembly is good, and the operation is stable and reliable.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model 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 this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A gear case assembly characterized by, It includes a housing body (100), an output gear shaft (200), a first axial roller assembly (300), a second axial roller assembly (400), and a radial roller assembly (500), wherein: The output gear shaft (200) passes through the housing body (100) and is rotatably engaged with the housing body (100); the first axial roller assembly (300) is sleeved on the outside of the output gear shaft (200) and is axially fixed relative to the housing body (100); the second axial roller assembly (400) is sleeved on the outside of the output gear shaft (200) and is axially fixed relative to the housing body (100); the radial roller assembly (500) is sleeved on the outside of the output gear shaft (200), the radial roller assembly (500) is located between the first axial roller assembly (300) and the second axial roller assembly (400), and the radial roller assembly (500) is radially fixed relative to the housing body (100).

2. The gearbox assembly according to claim 1, characterized in that: The housing body (100) includes a first housing (110) and a second housing (120) connected together. The roller body of the first axial roller assembly (300) is clamped between the first housing (110) and the second housing (120). The roller body of the second axial roller assembly (400) is clamped between the second housing (120) and the output gear shaft (200). The roller body of the radial roller assembly (500) is clamped between the output gear shaft (200) and the second housing (120).

3. The gearbox assembly according to claim 2, characterized in that: The second housing (120) has a first side and a second side arranged at intervals along the axial direction of the output gear shaft (200). The first side is provided with a first positioning groove (121), and the first axial roller assembly (300) is embedded in the first positioning groove (121). The second side is provided with a second positioning groove (122), and the second axial roller assembly (400) is embedded in the second positioning groove (122).

4. The gearbox assembly according to claim 1, characterized in that: The outer circumferential surface of the output gear shaft (200) is provided with a limiting shoulder (210), and the roller body of the second axial roller assembly (400) is clamped between the housing body (100) and the limiting shoulder (210).

5. The gearbox assembly according to claim 4, characterized in that: A limiting nut (600) is screwed onto the outer circumferential surface of the output gear shaft (200). The limiting nut (600) contacts the side of the housing body (100) away from the limiting shoulder (210), so that the housing body (100) and the output gear shaft (200) are fixed relative to each other in the axial direction of the output gear shaft (200).

6. The gearbox assembly according to claim 5, characterized in that: A bushing (900) is fitted onto the outer circumferential surface of the output gear shaft (200). In the axial direction of the output gear shaft (200), the bushing (900) cooperates with the housing body (100) to clamp the first axial roller assembly (300). The limiting nut (600) contacts the side of the bushing (900) away from the housing body (100).

7. The gearbox assembly according to any one of claims 1-6, characterized in that: The housing body (100) is provided with an assembly hole and a lubrication channel (101), and the output gear shaft (200) passes through the assembly hole; the lubrication channel (101) is provided with a plurality of lubrication flow ports (102), and each of the lubrication flow ports (102) is connected to the assembly hole.

8. The gearbox assembly according to claim 7, characterized in that: At least one lubrication port (102) is provided between the first axial roller assembly (300) and the radial roller assembly (500); or / and at least one lubrication port (102) is provided between the second axial roller assembly (400) and the radial roller assembly (500).

9. The gearbox assembly according to claim 7, characterized in that: The assembly hole has a third positioning groove (123) on its wall, and the radial roller assembly (500) is embedded in the third positioning groove (123).

10. The gearbox assembly according to claim 7, characterized in that: The gearbox assembly further includes a first oil seal (700) and a second oil seal (800), both of which are located between the gearbox body (100) and the output gear shaft (200). The first axial roller assembly (300), the second axial roller assembly (400), and the radial roller assembly (500) are all located between the first oil seal (700) and the second oil seal (800).

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