Composite planetary reduction gearbox

Abstract

The composite planetary reduction gearbox comprises an upper reduction gearbox body and an input shaft, the upper reduction gearbox body is movably connected with the input shaft in an inserted mode, the input shaft is sleeved with a bearing a, the input shaft is rotationally connected with a planet carrier bearing seat through the bearing a, and the upper portion of the surface of the input shaft is sleeved with an input end cover; a framework oil seal a is arranged on the input end cover, a fixed connecting seat is fixed on the outer side of the planet carrier bearing seat, a direct insertion nozzle is arranged on the fixed connecting seat, a fixed large gear is installed at the bottom end of the fixed connecting seat, and a slewing bearing is arranged at the bottom end of the fixed large gear; and a reduction gearbox lower shell is arranged outside the slewing bearing. According to the composite planetary reduction gearbox, the upper reduction gearbox is directly inserted into the input shaft, maintenance is convenient, cost input is reduced, the lower reduction gearbox is internally provided with a first-stage planet carrier for speed reduction, and the rotating speed is further stably reduced.

Description

Technical Field

[0001] The invention relates to the technical field of reducers, and in particular to a composite planetary reduction box. Background Art

[0002] Traditional vertical shaft planetary mixer reducers all operate in a revolution and rotation mode, and their structure is relatively complex, consisting of two parallel reducers above and below. The upper reducer housing is fixed on the mixer, and uses multi-level parallel gear reduction with a unique reduction ratio. If you want to choose a different reduction ratio, you need to change multiple gears and other parts or even the housing, which is costly. The lower planetary reducer is fixedly connected to the upper reducer, and only contains a planetary pinion that cooperates with the orbiting large gear to perform revolution and rotation. Disassembly and maintenance require the upper and lower reducers to be dismantled as a whole, and cannot be produced in groups and modularized, which greatly increases production and maintenance costs.

[0003] The patent application number CN202311121912.X discloses a backlash-eliminating planetary reducer, including a planet carrier, a sun gear, an inner gear ring and a plurality of planetary gears. The characteristic of the reducer is that an elastic element is arranged between the planet carrier and the sun gear to adjust the preload of the planetary gear, reduce the backlash, and improve the transmission accuracy and stability. Although the technology has made some progress in improving transmission accuracy, it has not yet provided a comprehensive solution in terms of maintenance convenience, dust prevention and oil seal design.

[0004] Given the limitations of existing technologies in terms of maintenance convenience, dust prevention, and oil seal design, it is necessary to provide a more efficient, stable, and cost-effective reduction gearbox. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a composite planetary reduction box, which solves the problems of poor dustproof oil seal effect, high production cost and high maintenance cost of vertical shaft planetary mixer.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: a composite planetary reduction box, comprising an upper reduction box and an input shaft, wherein the upper reduction box is movably plugged with the input shaft, the outer portion of the input shaft is sleeved with a bearing a, the input shaft is rotatably connected to a planetary carrier bearing seat through the bearing a, an input end cover is sleeved above the surface of the input shaft, a skeleton oil seal a is arranged on the input end cover, a fixed connection seat is fixed to the outer side of the planetary carrier bearing seat, a direct plug nozzle is arranged on the fixed connection seat, a fixed large gear is installed at the bottom end of the fixed large gear, a slewing bearing is arranged at the bottom end of the fixed large gear, and a reduction box lower housing is arranged on the outer side of the slewing bearing;

[0007] A reduction gearbox upper housing is installed above the reduction gearbox lower housing, a sealing ring is installed between the reduction gearbox upper housing and the fixed connecting seat, felt is provided on the surface of the reduction gearbox upper housing, the bottom end of the input shaft is meshed with planetary gears and a fixed large gear through gear transmission, a lower planetary carrier is penetrated inside the reduction gearbox lower housing, and the reduction gearbox lower housing is driven to rotate around the center of the slewing support through a spline, a self-rotating pinion is installed at the center distance between the reduction gearbox upper housing and the reduction gearbox lower housing, an output shaft is penetrated outside the self-rotating pinion, a bearing end cover a, a bearing b and a spacer ring b are provided above the output shaft, a bearing c, a skeleton oil seal c, a bearing end cover b and a spacer ring c are provided below the output shaft, a skeleton oil seal b is provided in the middle of the output shaft, An output shaft bearing seat is installed below, and a stirring connecting frame is installed below the output shaft bearing seat. A cover plate is installed at the bottom end of the output shaft bearing seat, and the stirring connecting frame is fixedly connected to the output shaft through the cover plate. A locking nut is threadedly connected to the bottom end of the lower planetary frame, and a gasket b is arranged on the inner side of the locking nut, and a dust cover is sleeved on the outer side of the locking nut. An upper planetary frame is installed on the lower planetary frame, and the upper planetary frame and the lower planetary frame are connected in upper and lower parts. A planetary gear is arranged inside the upper planetary frame, and a number of roller needles are distributed inside the planetary gear, and a spacer ring a is arranged between the upper and lower roller needles to separate them. A planetary shaft passes through the interior of the planetary gear, and a gasket a with a notch is installed at the upper and lower ends of the planetary gear, and a hemispherical top bead is installed at the center position of the lower shell of the reduction box.

[0008] Preferably, the fixed gearwheel is connected to the fixed side of the slewing bearing, and the slewing side of the slewing bearing is connected to the lower housing of the reduction gearbox.

[0009] Preferably, a gap is provided between the upper shell of the reduction gearbox and the fixed connecting seat, and a sealing ring is installed in the gap, which cooperates with the concave-convex structure of the fixed connecting seat to form a maze, and rotates around the center of the fixed connecting seat without interference. The maze ring is provided with U-shaped concave-convex steps, and the concave surface is provided with a number of threaded holes for installation on the upper shell of the reduction gearbox.

[0010] Preferably, the felt is embedded in the cylindrical surface of the upper shell of the reduction gearbox.

[0011] Preferably, a plurality of oil filling holes are provided on the fixed connection seat, and the direct plug nozzle is installed on the oil filling holes.

[0012] Preferably, a spline hub is provided on the upper portion of the input shaft, and a gear is provided on the lower portion, so that the sun gear meshes with the inner teeth of the planetary gear and the fixed large gear, forming a planetary system for deceleration.

[0013] Preferably, the surface of the lower planetary carrier is provided with threads, and is locked on the lower housing of the reduction gearbox through a gasket b and a locking nut, and a dust cover is installed on the lower housing of the reduction gearbox.

[0014] Compared with the prior art, the present invention provides a composite planetary reduction gearbox, which has the following beneficial effects:

[0015] 1. For this composite planetary reducer, the upper reducer can be selected from planetary reducers with different reduction ratios on the market and installed independently, which is convenient for maintenance and reduces cost investment; while the lower reducer is performing revolution and rotation, it contains a first-stage planetary carrier for deceleration. The first-stage planetary carrier can be disassembled and taken out as a whole for easy maintenance, and can further reduce the speed stably.

[0016] 2. The composite planetary reduction box adopts a slewing support to carry and rotate the reduction box housing, which effectively improves the reduction box's anti-bearing capacity and impact force. The labyrinth ring oil filling design is used for oil sealing, which effectively prevents the intrusion of concrete and dust and prevents the lubricating oil of the reduction box gear from flowing out, so that the gear can operate stably for a long time and improve the service life of the reduction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of a composite planetary reduction gearbox according to the present invention;

[0018] Figure 2 This is an exploded view of a composite planetary reduction gearbox according to the present invention;

[0019] Figure 3 A maze diagram formed by the concave-convex structure of the fixed connection seat of the composite planetary reduction box of the present invention;

[0020] Figure 4 This is a schematic diagram of the shaft side of a composite planetary reduction gearbox according to the present invention.

[0021] The symbols in the accompanying drawings are described as follows:

[0022] 1. Upper reduction box; 2. Input shaft; 3. Input end cover; 4. Framework oil seal a; 5. Bearing a; 6. Planet carrier bearing seat; 7. Fixed connection seat; 8. Direct plug nozzle; 9. Sealing ring; 10. Felt; 11. Reducer upper housing; 12. Reducer lower housing; 13. Upper planet carrier; 14. Lower planet carrier; 15. Top ball; 16. Planet shaft; 17. Gasket a; 18. Needle roller; 19. Spacer ring a; 20. Planetary gear ; 21. Fixed large gear; 22. Slewing bearing; 23. Bearing end cover a; 24. Bearing b; 25. Spacer ring b; 26. Rotating small gear; 27. Output shaft; 28. Skeleton oil seal b; 29. ​​Output shaft bearing seat; 30. Bearing c; 31. Skeleton oil seal c; 32. Bearing end cover b; 33. Spacer ring c; 34. Stirring connecting frame; 35. Cover plate; 36. Gasket b; 37. Locking nut; 38. Dust cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-4 The present invention provides a composite planetary reduction box, comprising an upper reduction box 1 and an input shaft 2, wherein the upper reduction box 1 is movably plugged with the input shaft 2, a bearing a5 is sleeved on the outside of the input shaft 2, the input shaft 2 is rotatably connected to a planetary carrier bearing seat 6 through the bearing a5, an input end cover 3 is sleeved on the surface of the input shaft 2, a skeleton oil seal a4 is arranged on the input end cover 3, a fixed connection seat 7 is fixed on the outside of the planetary carrier bearing seat 6, a direct plug nozzle 8 is arranged on the fixed connection seat 7, a fixed large gear 21 is installed at the bottom end of the fixed large gear 21, a slewing bearing 22 is arranged at the bottom end of the fixed large gear 21, and a reduction box lower housing 12 is arranged on the outside of the slewing bearing 22;

[0025] The upper housing 11 of the reduction box is installed above the lower housing 12 of the reduction box, a sealing ring 9 is installed between the upper housing 11 of the reduction box and the fixed connecting seat 7, a felt 10 is arranged on the surface of the upper housing 11 of the reduction box, a planetary gear 20 and a fixed large gear 21 are driven by gear meshing at the bottom end of the input shaft 2, a lower planetary carrier 14 is penetrated inside the lower housing 12 of the reduction box, and the lower housing 12 of the reduction box is driven to rotate around the center of the slewing bearing 22 through a spline, a self-rotating pinion 26 is installed at the center distance between the upper housing 11 of the reduction box and the lower housing 12 of the reduction box, an output shaft 27 is penetrated outside the self-rotating pinion 26, a bearing end cover a 23, a bearing b 24 and a spacer ring b 25 are arranged above the output shaft 27, a bearing c 30, a skeleton oil seal c 31, a bearing end cover b 32 and a spacer ring c 33 are arranged below the output shaft 27, and a skeleton oil seal b 31 is arranged in the middle of the output shaft 27. 28. An output shaft bearing seat 29 is installed below the lower housing 12 of the reduction box, and a stirring connecting frame 34 is installed below the output shaft bearing seat 29. A cover plate 35 is installed at the bottom end of the output shaft bearing seat 29, and the stirring connecting frame 34 is fixedly connected to the output shaft 27 through the cover plate 35. A locking nut 37 is threadedly connected to the bottom end of the lower planetary frame 14, and a gasket b 36 is arranged on the inner side of the locking nut 37, and a dust cover 38 is sleeved on the outer side of the locking nut 37. An upper planetary frame 13 is installed on the lower planetary frame 14, and the upper planetary frame 13 and the lower planetary frame 14 are connected in upper and lower parts. A planetary gear 20 is arranged inside the upper planetary frame 13, and a plurality of roller needles 18 are evenly distributed inside the planetary gear 20, and a spacer ring a 19 is arranged between the upper and lower roller needles 18 to separate them. A planetary shaft 16 runs through the interior of the planetary gear 20, and a gasket a with a notch is installed at the upper and lower ends of the planetary gear 20. 17. A hemispherical top ball 15 is installed at the center of the lower housing 12 of the reduction box. By directly inserting the upper reduction box 1 into the input shaft 2, and the input shaft 2 can drive the output shaft 27 to rotate through the engagement of the fixed large gear 21 and the rotating small gear 26, so that the output shaft 27 can drive the stirring connecting frame 34 to rotate to realize the stirring work.

[0026] Furthermore, the fixed large gear 21 is connected to the fixed side of the slewing bearing 22 , and the slewing side of the slewing bearing 22 is connected to the reduction gearbox lower housing 12 , so that the reduction gearbox lower housing 12 can support and rotate the fixed connection seat 7 through the slewing bearing 22 .

[0027] Furthermore, a gap is provided between the upper housing 11 of the reduction gearbox and the fixed connecting seat 7, and a sealing ring 9 is installed in the gap in the middle, which cooperates with the concave-convex structure of the fixed connecting seat 7 to form a maze, and rotates around the center of the fixed connecting seat 7 without interference, thereby preventing concrete and dust from invading. A U-shaped concave-convex step is provided on the maze ring, and a plurality of threaded holes are provided on the concave surface for installation on the upper housing 11 of the reduction gearbox, so as to facilitate multi-point injection of grease into the concave surface, and the grease is evenly attached to the maze gap as the maze ring rotates, thereby achieving a sealing effect of preventing external dust from entering the interior and preventing oil from leaking out.

[0028] Furthermore, the felt 10 is embedded in the cylindrical surface of the upper housing 11 of the reduction box, and the cylindrical surface of the fixed connection seat 7 is sealed by extrusion to prevent the lubricating oil of the gears in the reduction box from flowing out.

[0029] Furthermore, a plurality of oil filling holes are provided on the fixed connection seat 7, and the direct plug nozzle 8 is installed on the oil filling hole, and grease can be regularly injected into the sealing ring 9 through the direct plug nozzle 8 for sealing.

[0030] Furthermore, a spline hub is provided on the upper part of the input shaft 2, and gears are provided on the lower part, so that the sun gear is meshed with the internal teeth of the planetary gears 20 and the fixed large gear 21, thereby forming a planetary system for deceleration. The input shaft 2 can be installed together with the upper reduction box 1 through the spline hub, and a planetary system can be formed through the gears for deceleration.

[0031] Furthermore, the surface of the lower planetary carrier 14 is provided with threads, which are locked on the reduction box lower housing 12 through gasket b 36 and locking nut 37, and a dust cover 38 is installed on the reduction box lower housing 12 to prevent the locking nut 37 from being solidified by concrete and facilitate disassembly and maintenance.

[0032] When in use, the various structural components used in the composite planetary reduction box are installed in sequence inside the upper planetary frame 13 and the lower planetary frame 14, and then the upper planetary frame 13 and the lower planetary frame 14 are installed and fixed, so that the various structural components can be used in conjunction with each other. The upper reduction box 1 can select a vertical planetary reduction box with different reduction ratios commonly used on the market, and can be directly inserted into the input shaft 2 to drive the input shaft 2 to rotate, and the input shaft 2 can drive the output shaft 27 to rotate through the engagement of the fixed large gear 21 with the self-rotating small gear 26, so that the output shaft 27 can drive the stirring connecting frame 34 to rotate, and then the stirring work can be achieved through the stirring connecting frame 34. The upper reduction box 1 can select a vertical planetary reduction box for independent installation, which is convenient for maintenance and reduces cost investment, and is convenient for selecting planetary reduction boxes with different reduction ratios on the market. The lower reduction box matching the upper reduction box 1 contains a first-stage planetary frame deceleration while performing revolution and rotation, which can stably further reduce the speed, and the first-stage planetary frame can be disassembled and taken out as a whole for easy maintenance, thereby reducing the production and maintenance costs of the upper reduction box 1.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite planetary reduction gearbox, comprising an upper reduction gearbox (1) and an input shaft (2), characterized in that: The upper reduction gearbox (1) is movably plugged with the input shaft (2); the input shaft (2) is sleeved with a bearing a (5) on its exterior; the input shaft (2) is rotatably connected to a planetary carrier bearing seat (6) via the bearing a (5); an input end cover (3) is sleeved on the surface of the input shaft (2); a skeleton oil seal a (4) is arranged on the input end cover (3); a fixed connection seat (7) is fixed on the exterior of the planetary carrier bearing seat (6); a direct plug-in nozzle (8) is arranged on the fixed connection seat (7); a fixed large gear (21) is installed at the bottom end of the fixed large gear (21); a slewing bearing (22) is arranged at the bottom end of the slewing bearing (22); a reduction gearbox lower housing (12) is arranged on the exterior of the slewing bearing (22); and a reduction gearbox upper housing (11) is installed above the reduction gearbox lower housing (12).

2. A composite planetary reduction gearbox according to claim 1, characterized in that: A sealing ring (9) is installed between the reduction box upper shell (11) and the fixed connection seat (7), and a felt (10) is provided on the surface of the reduction box upper shell (11).

3. A composite planetary reduction gearbox according to claim 1, characterized in that: The bottom end of the input shaft (2) is driven by a planetary gear (20) and a fixed large gear (21) through gear meshing.

4. A composite planetary reduction gearbox according to claim 1, characterized in that: The lower planetary carrier (14) penetrates the interior of the gearbox lower housing (12), and drives the gearbox lower housing (12) to rotate around the center of the slewing bearing (22) through a spline. A self-rotating pinion (26) is installed at the center distance between the gearbox upper housing (11) and the gearbox lower housing (12).

5. A composite planetary reduction gearbox according to claim 4, characterized in that: An output shaft (27) passes through the outside of the rotating pinion (26); a bearing end cover a (23), a bearing b (24) and a spacer ring b (25) are arranged above the output shaft (27); a bearing c (30), a skeleton oil seal c (31), a bearing end cover b (32) and a spacer ring c (33) are arranged below the output shaft (27); and a skeleton oil seal b (28) is arranged in the middle of the output shaft (27).

6. The composite planetary reduction gearbox according to claim 1, characterized in that: An output shaft bearing seat (29) is installed below the reduction box lower housing (12), a stirring connection frame (34) is installed below the output shaft bearing seat (29), a cover plate (35) is installed at the bottom end of the output shaft bearing seat (29), and the stirring connection frame (34) is fixedly connected to the output shaft (27) through the cover plate (35).

7. A composite planetary reduction gearbox according to claim 4, characterized in that: The bottom end of the lower planetary carrier (14) is threadedly connected with a locking nut (37), and a gasket b (36) is arranged on the inner side of the locking nut (37), and a dust cover (38) is sleeved on the outer side of the locking nut (37); an upper planetary carrier (13) is mounted on the lower planetary carrier (14), and the upper planetary carrier (13) and the lower planetary carrier (14) are connected in upper and lower parts, and a planetary gear (20) is arranged inside the upper planetary carrier (13).

8. The composite planetary reduction gearbox according to claim 7, characterized in that: The interior of the planetary wheel (20) is evenly distributed with a plurality of needle rollers (18) at the top and bottom, and a spacer ring a (19) is arranged between the upper and lower needle rollers (18) to separate them. The interior of the planetary wheel (20) is penetrated by a planetary shaft (16). Gaskets a (17) with notches are installed at the upper and lower ends of the planetary wheel (20). A hemispherical top ball (15) is installed at the center position of the lower housing (12) of the reduction box.

9. The composite planetary reduction gearbox according to claim 1, characterized in that: The fixed large gear (21) is connected to the fixed side of the slewing bearing (22), and the slewing side of the slewing bearing (22) is connected to the lower housing (12) of the reduction box.

10. The composite planetary reduction gearbox according to claim 2, characterized in that: A gap is provided between the upper housing (11) of the reduction gearbox and the fixed connection seat (7), and a sealing ring (9) is installed in the gap, which cooperates with the concave-convex structure of the fixed connection seat (7) to form a labyrinth, and rotates around the center of the fixed connection seat (7) without interference. The labyrinth ring is provided with U-shaped concave-convex steps, and the concave surface is provided with a plurality of threaded holes, which is used for being installed on the upper housing (11) of the reduction gearbox.

11. A composite planetary reduction gearbox according to claim 2, characterized in that: The felt (10) is embedded in the cylindrical surface of the upper housing (11) of the reduction gearbox.

12. The composite planetary reduction gearbox according to claim 1, characterized in that: The fixed connection seat (7) is provided with a plurality of oil injection holes, and the direct plug nozzle (8) is installed on the oil injection holes.

13. The composite planetary reduction gearbox according to claim 1, characterized in that: The upper part of the input shaft (2) is provided with a spline hub, and the lower part is provided with a gear, so that the sun gear is meshed with the internal teeth of the planetary gear (20) and the fixed large gear (21), thereby forming a planetary system for speed reduction.

14. A composite planetary reduction gearbox according to claim 4, characterized in that: The surface of the lower planet carrier (14) is provided with threads and is locked on the reduction box lower housing (12) through a gasket b (36) and a locking nut (37), and a dust cover (38) is installed on the reduction box lower housing (12).

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