Swivelling gear box

Abstract

A kind of gear box for rotation, it is related to mechanical transmission technical field, it includes speed reducer body module and output module.Speed reducer body module includes speed reducer shell and transmission mechanism, transmission mechanism is installed in speed reducer shell, the rotation axis of the output part of transmission mechanism is set as first axis;Output module includes output shell and output gear shaft, the center line of output shell is set as second axis, output shell is detachably connected with speed reducer shell, and first axis and second axis are eccentrically arranged;Output gear shaft is rotatably connected with output shell, output gear shaft is drivingly connected with output part and coaxially arranged, output gear shaft and output part are slidably matched in the extension direction of first axis.It can be applied to both pre-welding mounting seat form and post-welding mounting seat form, can be installed and adjusted side gap in narrow space using pre-welding mode, and can also avoid the situation that motor and mainframe interfere during side gap adjustment.

Description

Technical Field

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

[0002] Stacker-reclaimers or conveyor boom cranes and other construction machinery require a rotary gearbox to drive their slewing mechanism, which is the most important transmission device in the main unit. The rotary reducer needs to accommodate components such as a motor, brake, and coupling, resulting in a right-angle shaft arrangement. During main unit installation, the reducer's long shaft gear needs to mesh with the open rotary large gear ring; the meshing backlash between these two components is extremely important during commissioning.

[0003] The inventors discovered through research that the rotary gearbox of the relevant technology has at least the following problems: Firstly, the original form of the post-welding mounting base affects concentricity and cylinder rigidity. Also, some main unit installation spaces are compact, and welding torches and other equipment cannot be inserted into the mounting base and main unit frame, making post-welding operations impossible. Secondly, when adjusting the side clearance, any rotary reducer may interfere with the main unit frame. The entire main unit is basically a hollow space in only one direction. In this case, it is necessary to disassemble the reducer in order to adjust the motor angle. Summary of the Invention

[0004] The objectives of this invention include, for example, providing a rotary gearbox that allows for flexible adjustment of the installation strategy, enabling either welding the mounting base first or welding it later, and allowing for installation and adjustment of the backlash in confined spaces using a pre-welding method, while also avoiding interference between the motor and the main frame during backlash adjustment.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a rotary gearbox, comprising: The reducer body module and the output module are provided. The reducer body module includes a reducer housing and a transmission mechanism. The transmission mechanism is installed inside the reducer housing, and the rotation axis of the output part of the transmission mechanism is set as a first axis. The output module includes an output housing and an output gear shaft. The center line of the output housing is set as a second axis. The output housing is detachably connected to the reducer housing, and the first axis and the second axis are eccentrically arranged. The output gear shaft is rotatably connected to the output housing, and the output gear shaft is drivenly connected to the output part and coaxially arranged. The output gear shaft and the output part are slidably engaged in the extension direction of the first axis.

[0006] In an optional embodiment, the output section is provided with an internal spline hole, the axis of which coincides with the first axis; the output gear shaft is provided with an external spline, the output gear shaft is inserted into the internal spline hole, and the external spline meshes with the internal spline hole.

[0007] In an optional embodiment, the internal spline hole is provided with a first stop and a second stop, and the wall of the internal spline hole is provided with internal spline teeth located between the first stop and the second stop. The outer peripheral surface of the output gear shaft is simultaneously in contact with the first stop and the second stop, and the external spline meshes with the internal spline teeth.

[0008] In an optional embodiment, the output module further includes an output support bearing, through which the output gear shaft is rotatably connected to the output housing.

[0009] In an optional embodiment, the output module further includes a first bushing, a second bushing, and a fixing nut arranged in sequence; the first bushing and the second bushing are both sleeved on the outside of the output gear shaft, and the inner ring of the output support bearing is clamped between the first bushing and the second bushing; the fixing nut is screwed to the output gear shaft and contacts the second bushing, and the fixing nut is located on the side of the second bushing closer to the reducer body module.

[0010] In an optional embodiment, the reducer body module further includes a reducer bearing, and the output part is rotatably connected to the reducer housing via the reducer bearing; the reducer bearing and the internal spline hole at least partially overlap in the radial direction of the internal spline hole.

[0011] In an optional embodiment, the reducer housing is provided with a first flange ring plate, which has a plurality of first fixing holes and a plurality of clearance holes, the plurality of first fixing holes being arranged at intervals around the first axis; the plurality of clearance holes being arranged at intervals around the first axis; the output housing is provided with a second flange ring plate, which has a plurality of second fixing holes and a plurality of third fixing holes, the plurality of first fixing holes corresponding to and communicating with the plurality of second fixing holes one by one; the plurality of third fixing holes being arranged at intervals around the second axis; The rotary gearbox further includes a first fastener and a second fastener. The first fastener can be inserted into the communicating first fixing hole and the second fixing hole to fix the reducer housing and the output housing. The second fastener is inserted into the communicating clearance hole and the third fixing hole for fixed connection with the mounting base.

[0012] In an optional embodiment, the diameter of the clearance hole is larger than the diameter of the third fixing hole.

[0013] In an optional embodiment, the rotary gearbox further includes a lubrication module, which includes a lubrication pipeline and a drain valve. One end of the lubrication pipeline is detachably connected to the reducer housing, and the other end of the lubrication pipeline is connected to the drain valve.

[0014] In an optional embodiment, the output housing is provided with a positioning through hole, the end of the lubrication pipeline connected to the reducer housing is located inside the output housing, and the end of the lubrication oil circuit connected to the drain valve passes through the positioning through hole.

[0015] The beneficial effects of the embodiments of the present invention include, for example: In summary, the rotary gearbox provided in this embodiment, by setting the reducer body module and the output module as two independent modular structures, are detachably connected. During installation, the connection state can be adjusted as needed. This satisfies the requirement of adjusting gear backlash in confined spaces where the mounting base is welded first, and also avoids interference between the motor and the main frame. Specifically, during installation, the reducer body module and the output module are first connected together. The output housing of the output module is then inserted into the mounting cavity of the mounting base. Since the mounting base is welded first, meaning it is already fixed to the main frame, its position cannot be adjusted. Therefore, it is impossible to adjust the backlash between the output gear shaft and the open gear by moving the entire gearbox by moving the mounting base. Instead, the entire gearbox is directly rotated, causing it to rotate relative to the mounting base around the second axis. Because the axis of the output gear shaft coincides with the first axis, while the first axis is eccentric to the second axis, the position of the output gear shaft can be adjusted, moving it closer to or further away from the open gear, thereby changing the meshing backlash between the output gear shaft and the open gear. If, during or after backlash adjustment, there is interference between the position of the motor connected to the input section of the gearbox and the position of the main frame, the constraints of the reducer housing and the output housing are released. The position of the output housing remains unchanged, and the entire reducer body module is rotated around the first axis. Simultaneously, the rotation of the reducer body module will drive the output gear shaft to rotate around the first axis. Since the axis of the output gear shaft coincides with the first axis, the meshing backlash between the output gear shaft and the open gear will not change regardless of how the reducer body module is rotated, and the engagement between the output gear shaft and the open gear will not be affected. This operation allows for the adjustment of both the backlash and the motor position. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a first-view structural schematic diagram of the rotary gearbox provided in this embodiment; Figure 2 This is a second-view structural schematic diagram of the rotary gearbox provided in this embodiment; Figure 3 This is a cross-sectional view of the rotary gearbox provided in this embodiment; Figure 4 for Figure 3 A magnified schematic diagram of a portion of the structure.

[0018] icon: 001-First axis; 002-Second axis; 100-Reducer body module; 110-Reducer housing; 111-First flange ring plate; 112-First fixing hole; 113-Allowing hole; 120-Transmission mechanism; 121-Output planetary carrier; 122-Internal spline hole; 123-First stop; 124-Second stop; 125-Reducer bearing; 200-Output module; 210-Output housing; 211-Second flange ring plate; 212-Second fixing hole; 213-Third fixing hole; 214-Positioning through hole; 220-Output gear shaft; 230-Output support bearing; 240-First bushing; 250-Second bushing; 260-Fixing nut; 270-Through cover; 280-First oil seal; 290-Second oil seal; 300-First fastener; 400-Lubrication module; 410-Lubrication pipeline; 420-Oil drain valve. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] 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.

[0025] Please refer to Figures 1-4 This embodiment provides a rotary gearbox, which includes a reducer body module 100 and an output module 200. The reducer body module 100 includes a reducer housing 110 and a transmission mechanism 120. The transmission mechanism 120 is installed inside the reducer housing 110, and the rotation axis of the output part of the transmission mechanism 120 is set as a first axis 001. The output module 200 includes an output housing 210 and an output gear shaft 220. The center line of the output housing 210 is set as a second axis 002. The output housing 210 is detachably connected to the reducer housing 110, and the first axis 001 and the second axis 002 are eccentrically arranged. The output gear shaft 220 is rotatably connected to the output housing 210, and the output gear shaft 220 is drivenly connected to the output part and coaxially arranged. The output gear shaft 220 and the output part are slidably engaged in the extension direction of the first axis 001.

[0026] As described above, the assembly method of the rotary gearbox provided in this embodiment is as follows: By setting the reducer body module 100 and the output module 200 as two independent modular structures, which are detachably connected, the connection status of the two can be adjusted as needed during installation. This not only allows for adjusting the gear backlash in confined spaces after the mounting base has been welded first, but also avoids interference between the motor and the main frame. Specifically, during installation, the reducer body module 100 and the output module 200 are first connected together. The output housing 210 of the output module 200 is then inserted into the mounting cavity of the mounting base. Since the mounting base is welded first, that is, it is already welded and fixed to the main frame, its position cannot be adjusted. Therefore, it is impossible to adjust the backlash between the output gear shaft 220 and the open gear by moving the entire gearbox by moving the mounting base. Instead, the entire gearbox is rotated directly, causing it to rotate relative to the mounting base around the second axis 002. Since the axis of the output gear shaft 220 coincides with the first axis 001, while the first axis 001 is eccentric to the second axis 002, the position of the output gear shaft 220 can be adjusted to move it closer to or further away from the open gear, thereby changing the meshing backlash between the output gear shaft 220 and the open gear. If, during or after backlash adjustment, there is interference between the position of the motor connected to the input section of the gearbox and the position of the main frame, the constraints of the reducer housing 110 and the output housing 210 are released. The position of the output housing 210 remains unchanged, and the entire reducer body module 100 is rotated around the first axis 001. Simultaneously, the rotation of the reducer body module 100 drives the output gear shaft 220 to rotate around the first axis 001. Since the axis of the output gear shaft 220 coincides with the first axis 001, the meshing backlash between the output gear shaft 220 and the open gear will not change regardless of how the reducer body module 100 is rotated, and the engagement between the output gear shaft 220 and the open gear will not be affected. This operation enables the adjustment of both the backlash and the motor position.

[0027] It should be understood that if, during the backlash adjustment process, the appropriate backlash has not yet been achieved, interference occurs between the motor and the main frame or other components thereon. In this case, the constraints on the reducer housing 110 and output housing 210 can be released first, ensuring that the output housing 210 does not rotate relative to the mounting base. Instead, the reducer body module 100 can be rotated in the opposite direction to return to its initial position. Then, the reducer housing 110 and output housing 210 can be fixed, and the backlash adjustment can be performed again. Alternatively, if the user has a fixed requirement for the motor's position after the backlash adjustment is completed, the constraints on the reducer housing 110 and output housing 210 can be released first. By rotating the reducer body module 100, the motor can be moved to the set position, completing the motor position and backlash adjustment. This method offers flexibility.

[0028] The following embodiments illustrate the details of the rotary gearbox of this application by way of example.

[0029] Please refer to Figures 1-4 In this embodiment, optionally, the rotary gearbox includes a reducer body module 100, an output module 200, a first fastener 300, a second fastener (not shown), and a lubrication module 400. The reducer body module 100 and the output module 200 are detachably connected via the first fastener 300, and the second fastener secures the output module 200 to the mounting base, thus achieving a fixed connection between the rotary gearbox and the mounting base. The lubrication module 400 is connected to the reducer body module 100.

[0030] It should be understood that the rotary gearbox mates with the mounting base, the main frame, and the open gear. The rotary gearbox is fixed to the mounting base, the mounting base is fixed to the main frame, and the output gear shaft 220 of the rotary gearbox can mesh with the open gear to achieve torque output. The output gear shaft 220 and the open gear are externally meshed, and their backlash needs to be adjusted during installation to ensure output stability.

[0031] In this embodiment, optionally, the reducer body module 100 includes a reducer housing 110 and a transmission mechanism 120. The transmission mechanism 120 may include a parallel gear set and / or a planetary gear set. For example, in this embodiment, the transmission mechanism 120 includes a single-stage parallel gear set and a three-stage planetary gear set, and the output part of the transmission mechanism 120 is the output planet carrier 121 of the final-stage planetary gear set. In other embodiments, the structure of the transmission mechanism 120 may also be a combination of other reduction structures.

[0032] Please refer to Figures 3-4 Meanwhile, the output planetary carrier 121 is provided with an internal spline hole 122, and the rotation axis of the output planetary carrier 121 coincides with the central axis of the internal spline hole 122. These two axes can be referred to as the first axis 001. The output planetary carrier 121 is rotatably connected to the reducer housing 110 about the first axis 001 via a reducer bearing 125. Furthermore, the reducer bearing 125 and the internal spline hole 122 at least partially overlap in the radial direction of the internal spline hole 122; that is, there is no gap between the reducer bearing 125 and the internal spline hole 122 in the extending direction of the first axis 001.

[0033] Please refer to Figures 3-4Furthermore, the internal spline hole 122 is provided with a first stop 123 and a second stop 124, both of which can be cylindrical hole walls. Internal spline teeth are provided on the hole wall of the internal spline hole 122, located between the first stop 123 and the second stop 124. When the output gear shaft 220 of the output module 200 passes through the internal spline hole 122, the outer circumferential surface of the output gear shaft 220 simultaneously engages with the first stop 123 and the second stop 124, and the external spline meshes with the internal spline teeth. With this design, the output gear shaft 220 not only achieves a transmission connection with the output planetary carrier 121 through the spline structure, effectively transmitting torque, but also allows external forces on the output gear shaft 220 to be transmitted to the output planetary carrier 121 through the first stop 123 and the second stop 124, reducing the probability of bending deformation of the output gear shaft 220 and improving the operational stability of the output gear shaft 220. In this case, the number of bearings supporting the output gear shaft 220 can be reduced. For example, only one bearing can be used to support the output gear shaft 220, shortening the axial dimension and facilitating installation in environments with limited axial space.

[0034] Optionally, a first flange ring plate 111 is provided at the lower end of the reducer housing 110. The first flange ring plate 111 is provided with a plurality of first fixing holes 112 and a plurality of clearance holes 113. The plurality of first fixing holes 112 are evenly spaced around the first axis 001; the plurality of clearance holes 113 are evenly spaced around the first axis 001. Both the first fixing holes 112 and the clearance holes 113 can be cylindrical holes, and their number is designed as needed. In this embodiment, no specific limitation is made.

[0035] Please refer to Figures 1-2 In this embodiment, optionally, the output module 200 includes an output housing 210, an output gear shaft 220, an output support bearing 230, a first bushing 240, a second bushing 250, a fixing nut 260, a cover 270, a first oil seal 280, and a second oil seal 290. The first bushing 240, the second bushing 250, and the fixing nut 260 are sequentially sleeved on the output gear shaft 220. The fixing nut 260 is screwed into the output gear shaft 220 and can contact the second bushing 250. The inner ring of the output support bearing 230 is sleeved on the output gear shaft 220 and is located between the first bushing 240 and the second bushing 250. One end of the output gear shaft 220 is provided with an external spline, and the other end is provided with a tooth. The output gear shaft 220 is rotatably connected to the output housing 210 through the output support bearing 230. A cover 270 is installed on the end of the output housing 210 away from the reducer housing 110 and is fitted over the first bushing 240. A first oil seal 280 is provided between the first bushing 240 and the cover 270. A second oil seal 290 is provided between the second bushing 250 and the output housing 210.

[0036] During assembly, the output housing 210 is connected to the reducer housing 110, and parts of the reducer housing 110 and the output planetary carrier 121 are inserted into the output housing 210, reducing the axial dimension. Simultaneously, one end of the output gear shaft 220 is inserted into the internal spline hole 122, with the external spline meshing with the internal spline teeth. The other end of the output gear shaft 220 extends out of the through cover 270, with the gear body located outside the through cover 270 and the output housing 210 and capable of meshing with the open gear. Furthermore, after assembly, the second bushing 250 is located on the side of the first bushing 240 closest to the reducer housing 110; that is, the fixing nut 260 is located on the side of the second bushing 250 closest to the reducer housing 110. Since the inner spline hole 122 and the reducer bearing 125 overlap radially, the output gear shaft 220 is inserted into the inner spline hole 122 and can also be supported by the reducer bearing 125. Thus, the reducer bearing 125, together with an output support bearing 230, actually provides two support positions for the output gear shaft 220. With the first stop 123 and the second stop 124, the operation of the output gear shaft 220 is stable and reliable. Since only one output support bearing 230 is used, the axial dimension is greatly reduced.

[0037] Optionally, the output housing 210 is provided with a second flange ring plate 211, which has multiple second fixing holes 212 and multiple third fixing holes 213. The multiple first fixing holes 112 are connected to the multiple second fixing holes 212 in a one-to-one correspondence; the multiple third fixing holes 213 are evenly spaced around the second axis 002. Both the second fixing holes 212 and the third fixing holes 213 can be cylindrical holes.

[0038] Meanwhile, a positioning through hole 214 is provided on the peripheral wall of the output housing 210.

[0039] During assembly, the first flange ring plate 111 and the second flange ring plate 211 are mated together. Multiple first fixing holes 112 can mate with multiple second fixing holes 212. After the first fixing holes 112 communicate with their corresponding second fixing holes 212, first fasteners 300 can be inserted into them, thus achieving a fixed connection between the reducer housing 110 and the output housing 210. Simultaneously, second fasteners can pass through the clearance hole 113 and then out through the third fixing hole 213. The output housing 210 is inserted into the mounting cavity of the mounting base, and the second fasteners are used to fix the output housing 210 to the mounting base, thus achieving a fixed connection between the gearbox and the mounting base.

[0040] Furthermore, the diameter of the clearance hole 113 is larger than the diameter of the third fixing hole 213, so that the second fastener can easily pass through the clearance hole 113 and then into the third fixing hole 213.

[0041] In this embodiment, optionally, the lubrication module 400 includes a lubrication pipe 410 and a drain valve 420. One end of the lubrication pipe 410 is detachably connected to the reducer housing 110, and the other end of the lubrication pipe 410 is connected to the drain valve 420. Furthermore, the end of the lubrication pipe 410 connected to the reducer housing 110 is located inside the output housing 210, and the end of the lubrication pipe connected to the drain valve 420 extends out through the positioning through hole 214. This design, to avoid interference between the motor and the main frame, allows the lubrication pipe 410 to be disassembled from the reducer housing 110 after removing the first fastener 300. When the reducer body module 100 is rotated, the lubrication pipe 410 will not rotate with it, reducing operational difficulty and minimizing damage to the interface. After adjustment, the port of the lubrication pipe 410 can be connected to the oil passage interface on the reducer housing 110. For example, the port of the lubrication pipe 410 and the oil passage interface on the reducer housing 110 can be connected via a threaded structure for easy assembly and disassembly.

[0042] The rotary gearbox provided in this embodiment is flexible in its assembly and can adjust the backlash while welding the mounting base in a confined space, and can adjust the motor position without removing the entire gearbox, making installation convenient and reliable.

[0043] 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 rotary gearbox, characterized in that, include: The reducer body module (100) and the output module (200) are provided. The reducer body module (100) includes a reducer housing (110) and a transmission mechanism (120). The transmission mechanism (120) is installed inside the reducer housing (110). The rotation axis of the output part of the transmission mechanism (120) is set as a first axis (001). The output module (200) includes an output housing (210) and an output gear shaft (220). The center line of the output housing (210) is set as a second axis (002). The output housing (210) is detachably connected to the reducer housing (110), and the first axis (001) and the second axis (002) are eccentrically arranged. The output gear shaft (220) is rotatably connected to the output housing (210). The output gear shaft (220) is drivenly connected to the output part and is coaxially arranged. The output gear shaft (220) and the output part are slidably engaged in the extension direction of the first axis (001).

2. The rotary gearbox according to claim 1, characterized in that: The output section is provided with an internal spline hole (122), the axis of which coincides with the first axis (001); the output gear shaft (220) is provided with an external spline, the output gear shaft (220) is inserted into the internal spline hole (122), and the external spline meshes with the internal spline hole (122).

3. The rotary gearbox according to claim 2, characterized in that: The internal spline hole (122) is provided with a first stop (123) and a second stop (124). The internal spline hole (122) is provided with internal spline teeth located between the first stop (123) and the second stop (124). The outer peripheral surface of the output gear shaft (220) is simultaneously in contact with the first stop (123) and the second stop (124). The external spline meshes with the internal spline teeth.

4. The rotary gearbox according to claim 3, characterized in that: The output module (200) also includes an output support bearing (230), and the output gear shaft (220) is rotatably connected to the output housing (210) through the output support bearing (230).

5. The rotary gearbox according to claim 4, characterized in that: The output module (200) further includes a first bushing (240), a second bushing (250), and a fixing nut (260) arranged in sequence; the first bushing (240) and the second bushing (250) are both sleeved on the output gear shaft (220), and the inner ring of the output support bearing (230) is clamped between the first bushing (240) and the second bushing (250); the fixing nut (260) is screwed to the output gear shaft (220) and contacts the second bushing (250), and the fixing nut (260) is located on the side of the second bushing (250) closer to the reducer body module (100).

6. The rotary gearbox according to claim 4, characterized in that: The reducer body module (100) also includes a reducer bearing (125), and the output part is rotatably connected to the reducer housing (110) through the reducer bearing (125); the reducer bearing (125) and the inner spline hole (122) at least partially overlap in the radial direction of the inner spline hole (122).

7. The rotary gearbox according to claim 1, characterized in that: The reducer housing (110) is provided with a first flange ring plate (111), on which a plurality of first fixing holes (112) and a plurality of clearance holes (113) are provided. The plurality of first fixing holes (112) are arranged at intervals around the first axis (001); the plurality of clearance holes (113) are arranged at intervals around the first axis (001); the output housing (210) is provided with a second flange ring plate (211), on which a plurality of second fixing holes (212) and a plurality of third fixing holes (213) are provided. The plurality of first fixing holes (112) and the plurality of second fixing holes (212) are connected in a one-to-one correspondence; the plurality of third fixing holes (213) are arranged at intervals around the second axis (002); The rotary gearbox also includes a first fastener (300) and a second fastener. The first fastener (300) can be inserted into the communicating first fixing hole (112) and the second fixing hole (212) to fix the reducer housing (110) and the output housing (210). The second fastener is inserted into the communicating clearance hole (113) and the third fixing hole (213) for fixed connection with the mounting base.

8. The rotary gearbox according to claim 7, characterized in that: The diameter of the clearance hole (113) is larger than the diameter of the third fixing hole (213).

9. The rotary gearbox according to any one of claims 1-8, characterized in that: The rotary gearbox also includes a lubrication module (400), which includes a lubrication pipeline (410) and a drain valve (420). One end of the lubrication pipeline (410) is detachably connected to the reducer housing (110), and the other end of the lubrication pipeline (410) is connected to the drain valve (420).

10. The rotary gearbox according to claim 9, characterized in that: The output housing (210) is provided with a positioning through hole (214). The end of the lubrication pipeline (410) connected to the reducer housing (110) is located inside the output housing (210). The end of the lubrication oil circuit connected to the drain valve (420) passes through the positioning through hole (214).

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