CN214838180U - Double-speed planetary reducer - Google Patents

Abstract

The utility model discloses a double-speed planetary reducer, which comprises a shell, an input shaft, an output shaft, a primary sun gear, a primary planet gear shaft, a primary planet gear carrier, a primary inner gear ring, a secondary sun gear, a secondary planet gear shaft, a secondary planet gear carrier and a secondary inner gear ring; the secondary planet wheel carrier is fixed on the output shaft; the primary inner gear ring and the secondary inner gear ring are both arranged on the input shaft and can rotate around the input shaft, and a primary clutch device and a secondary clutch device are respectively arranged between the primary inner gear ring and the shell and between the secondary inner gear ring and the shell; the first-stage sun gear and the second-stage sun gear are both fixed on the input shaft; the first-stage planet carrier is fixedly connected with the second-stage inner gear ring. Compared with the prior double-motor double-speed output technology, the utility model realizes single-motor single-input double-speed output, has simple structure and obviously reduces the production cost; the product has compact structure and small volume; the bearing capacity is strong, and the device is suitable for large-load transmission.

Description

Double-speed planetary reducer

Technical Field

The utility model relates to a speed reducer especially relates to a double speed planetary reducer, belongs to retarding equipment technical field.

Background

At present, the speed reducers on crawler cranes, windlasses and power heads used in China are basically single-input single-output, and cannot realize the functions of quick and slow switching, so that the conditions of low working efficiency, short service life and the like are caused. Therefore, the research of the double-speed reducer is due to the fact that double-motor control double-speed driving is proposed, different power outputs and different rotating speed outputs are effectively controlled, and cost is greatly improved. The double-speed transmission is realized by using a mechanical synchronizer or a clutch and a parallel shaft type gear, but the bearing capacity is small, and the large-load transmission is not facilitated.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is mainly: the existing double-motor control double-speed drive way speed reducer has the problems of complex structure and too high manufacturing cost.

To the above problem, the utility model provides a technical scheme is:

a double-speed planetary reducer comprises a shell, an input shaft, an output shaft, a primary sun gear, a plurality of primary planet gears, a primary planet gear shaft, a primary planet gear carrier, a primary inner gear ring, a secondary sun gear, a plurality of secondary planet gears, a secondary planet gear shaft, a secondary planet gear carrier and a secondary inner gear ring; the primary sun gear is positioned in the primary inner gear ring and has the same axial lead, a plurality of primary planet gears are arranged between the periphery of the primary sun gear and the primary inner gear ring in equal arc length, each primary planet gear is respectively engaged with the primary sun gear and the primary inner gear ring, and the primary planet gears are arranged on the primary planet carrier through primary planet gear shafts and can automatically transmit around the primary planet gear shafts; the secondary planet gears are arranged on a secondary planet gear carrier through secondary planet gear shafts and can automatically transmit around the secondary planet gear shafts, and the secondary planet gear carrier is fixed on an output shaft; the primary inner gear ring and the secondary inner gear ring are both arranged on the input shaft and can rotate around the input shaft, and a primary clutch device and a secondary clutch device are respectively arranged between the primary inner gear ring and the shell and between the secondary inner gear ring and the shell; the first-stage sun gear and the second-stage sun gear are both fixed on the input shaft; the first-stage planet carrier is fixedly connected with the second-stage inner gear ring.

Furthermore, a brake hub which is integrally formed with the primary inner gear ring is arranged on the front side of the primary inner gear ring, and a primary clutch device is arranged between the primary inner gear ring and the shell and is arranged between the brake hub and the shell.

Furthermore, the primary planet carrier is in an original disc shape, the diameter of the primary planet carrier is smaller than that of the secondary inner gear ring, and a secondary clutch device is arranged between the secondary inner gear ring and the shell and is arranged between the periphery of the original disc-shaped primary planet carrier and the shell.

Furthermore, the primary planet carrier and the secondary inner gear ring are integrally formed.

Has the advantages that: compared with the prior double-motor double-speed output technology, the utility model realizes single-motor single-input double-speed output, has simple structure and obviously reduces the production cost; the product has compact structure and small volume; the bearing capacity is strong, and the device is suitable for large-load transmission.

Drawings

FIG. 1 is a schematic cross-sectional view of the two-speed planetary reducer;

fig. 2 is a schematic sectional view of the two-speed planetary reducer, in which a housing, a primary clutch device and a secondary clutch device are omitted for convenience of illustration.

In the figure: 1. a housing; 2. an input shaft; 3. an output shaft; 4. a primary sun gear; 5. a primary planetary gear; 6. a primary planet gear shaft; 7. a first-stage planet wheel carrier; 8. a primary annular gear; 801. a brake hub; 9. a secondary sun gear; 10. a secondary planetary gear; 11. a secondary planet gear shaft; 12. a secondary planet carrier; 13. a secondary annular gear; 14. a first stage clutch device; 15. and a secondary clutch device.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in fig. 1 and 2, a two-speed planetary reducer comprises a housing 1, an input shaft 2, an output shaft 3, a primary sun gear 4, a plurality of primary planet gears 5, a primary planet gear shaft 6, a primary planet carrier 7, a primary inner gear ring 8, a secondary sun gear 9, a plurality of secondary planet gears 10, a secondary planet gear shaft 11, a secondary planet carrier 12 and a secondary inner gear ring 13; the primary sun gear 4 is positioned in the primary inner gear ring 8 and has the same axial lead, a plurality of primary planet gears 5 are arranged between the periphery of the primary sun gear 4 and the primary inner gear ring 8 in equal arc length, each primary planet gear 5 is respectively meshed with the primary sun gear 4 and the primary inner gear ring 8, and the primary planet gears 5 are arranged on a primary planet carrier 7 through primary planet gear shafts 6 and can automatically transmit around the primary planet gear shafts 6; the secondary sun gear 9 is positioned in the secondary inner gear ring 13 and has the same axial lead, a plurality of secondary planet gears 10 are arranged between the periphery of the secondary sun gear 9 and the secondary inner gear ring 13 in equal arc length, each secondary planet gear 10 is respectively engaged with the secondary sun gear 9 and the secondary inner gear ring 13, the secondary planet gears 10 are arranged on a secondary planet carrier 12 through secondary planet gear shafts 11 and can automatically transmit around the secondary planet gear shafts 11, and the secondary planet carrier 12 is fixed on the output shaft 3; the primary inner gear ring 8 and the secondary inner gear ring 13 are both arranged on the input shaft 2 and can rotate around the input shaft 2, and a primary clutch device 14 and a secondary clutch device 15 are respectively arranged between the primary inner gear ring 8 and the shell 1 and between the secondary inner gear ring 13 and the shell 1; the primary sun gear 4 and the secondary sun gear 9 are both fixed on the input shaft 2; the primary planet carrier 7 is fixedly connected with the secondary inner gear ring 13. The input shaft 2 is connected with a motor, and the output shaft 3 can be further connected with a speed reducer or directly connected with an actuating mechanism.

In the above arrangement, the primary ring gear 8 and the secondary ring gear 13 are both mounted on the input shaft 2 through bearings. The primary planet gear 5 and the secondary planet gear 10 are also arranged on the planet gear shaft through bearings. The primary clutch 14 and the secondary clutch 15 are mature prior art products, and the main principle is to control the separation and the attachment of the inner friction plate on the rotating component and the outer friction plate embedded in the inner wall of the shell 1 to realize whether the rotating component freely rotates or keeps relatively static with the shell. The rotating parts are referred to herein as the primary ring gear 8 and the secondary ring gear 13.

When in application:

a, situation: the primary annular gear 8 and the shell 1 are closed through a primary clutch device 14, and the primary annular gear 8 is kept static relative to the shell 1; meanwhile, the secondary clutch device 15 is released, and the rotation of the secondary annular gear 13 is not restricted by the shell 1. The motor drives the input shaft 2 to rotate, the primary sun gear 4 rotates to drive the primary planetary gear 5 to rotate, and in the static state of the primary inner gear ring 8, the primary planetary gear 5 is forced to run in the primary inner gear ring 8 to force the primary planet gear carrier 7 to rotate together with the secondary inner gear ring 13, meanwhile, the secondary sun gear 9 rotates along with the input shaft 2 to drive the secondary planetary gear 10 to rotate, although the secondary inner gear ring 13 is also in a rotating state, the linear speed of the rotation of the secondary inner gear ring 13 at the meshing position of the secondary inner gear ring 13 and the secondary planetary gear 10 is lower than that of the rotation of the secondary planetary gear 10, the secondary planetary gear 10 is forced to run in the secondary inner gear ring 13, and further the secondary planet gear carrier 12 is forced to rotate together with the output shaft 3. At this time, the output shaft 3 has a specific rotational speed and torque.

B, situation: the primary inner gear ring 8 is separated from the shell 1 through the primary clutch device 14, and the rotation of the primary inner gear ring 8 is not restricted by the shell 1; at the same time, the secondary clutch 15 is closed and the secondary annulus gear 13 remains stationary relative to the housing 1. The motor drives the input shaft 2 to rotate, the primary sun gear 4 rotates to drive the primary planet gear 5 to rotate to drive the primary inner gear ring 8 to idle, meanwhile, the secondary sun gear 9 rotates along with the input shaft 2 to drive the secondary planet gear 10 to rotate, and the secondary planet gear 10 is forced to run in the secondary inner gear ring 13 to force the secondary planet carrier 12 to rotate together with the output shaft 3 because the secondary inner gear ring 13 is kept static relative to the shell 1. At this time, the output shaft 3 has a rotation speed and a torque different from those in the case of a.

Therefore, the effect that double-speed output can be obtained by a single motor and a single input is realized, the structure is simple, and the production cost is obviously reduced.

As shown in fig. 1 and 2, a brake hub 801 integrally formed with the primary ring gear 8 is disposed on the front side of the primary ring gear 8, and a primary clutch device 14 is disposed between the primary ring gear 8 and the housing 1, wherein the primary clutch device 14 is disposed between the brake hub 801 and the housing 1. With this arrangement, it is avoided that the primary clutch 14 is provided between the outer peripheral surface of the primary ring gear 8 and the housing, which would otherwise result in an increase in the diameter of the transmission.

The primary planet carrier 7 is in an original disc shape, the diameter of the primary planet carrier 7 is smaller than that of the secondary inner gear ring 13, the primary planet carrier 7 is fixedly connected with the secondary inner gear ring 13, a secondary clutch device 15 is arranged between the secondary inner gear ring 13 and the shell 1, and actually, the secondary clutch device 15 is arranged between the periphery of the original disc-shaped primary planet carrier 7 and the shell 1. With this arrangement, it is avoided that a secondary clutch device 15 is provided between the outer peripheral surface of the secondary ring gear 13 and the housing, which would otherwise cause an increase in the diameter of the transmission.

The primary planet carrier 7 and the secondary inner gear ring 13 are integrally formed. Therefore, the manufacturing process can be carried out at one time, and more connecting parts can be avoided.

The above embodiments are only for the purpose of more clearly describing the invention and should not be considered as limiting the scope of protection covered by the invention, any modification of the equivalent should be considered as falling within the scope of protection covered by the invention.

Claims (4)

1. A double-speed planetary reducer comprises a shell (1), an input shaft (2), an output shaft (3), a primary sun gear (4), a plurality of primary planet gears (5), a primary planet gear shaft (6), a primary planet gear carrier (7), a primary inner gear ring (8), a secondary sun gear (9), a plurality of secondary planet gears (10), a secondary planet gear shaft (11), a secondary planet gear carrier (12) and a secondary inner gear ring (13); the primary sun gear (4) is positioned in the primary inner gear ring (8) and has the same axial lead, a plurality of primary planet gears (5) are arranged between the periphery of the primary sun gear (4) and the primary inner gear ring (8) in equal arc length, each primary planet gear (5) is respectively meshed with the primary sun gear (4) and the primary inner gear ring (8), and the primary planet gears (5) are arranged on a primary planet gear carrier (7) through primary planet gear shafts (6) and can automatically transmit around the primary planet gear shafts (6); the secondary sun gear (9) is positioned in the secondary inner gear ring (13) and has the same axial lead, a plurality of secondary planet gears (10) are arranged between the periphery of the secondary sun gear (9) and the secondary inner gear ring (13) in equal arc length, each secondary planet gear (10) is respectively meshed with the secondary sun gear (9) and the secondary inner gear ring (13), the secondary planet gears (10) are arranged on a secondary planet gear carrier (12) through secondary planet gear shafts (11) and can automatically transmit around the secondary planet gear shafts (11), and the secondary planet gear carrier (12) is fixed on the output shaft (3); the method is characterized in that: the primary inner gear ring (8) and the secondary inner gear ring (13) are both arranged on the input shaft (2) and can rotate around the input shaft (2), and a primary clutch device (14) and a secondary clutch device (15) are respectively arranged between the primary inner gear ring (8) and the shell (1) and between the secondary inner gear ring (13) and the shell (1); the primary sun gear (4) and the secondary sun gear (9) are both fixed on the input shaft (2); the primary planet carrier (7) is fixedly connected with the secondary inner gear ring (13).

2. The two-speed planetary reducer of claim 1, wherein: a brake hub (801) integrally formed with the primary inner gear ring (8) is arranged on the front side of the primary inner gear ring (8), a primary clutch device (14) is arranged between the primary inner gear ring (8) and the shell (1), and the primary clutch device (14) is arranged between the brake hub (801) and the shell (1).

3. The two-speed planetary reducer of claim 1, wherein: the primary planet carrier (7) is in an original disc shape, the diameter of the primary planet carrier is smaller than that of the secondary inner gear ring (13), a secondary clutch device (15) is arranged between the secondary inner gear ring (13) and the shell (1), and the secondary clutch device (15) is arranged between the periphery of the original disc-shaped primary planet carrier (7) and the shell (1).

4. A two-speed planetary reducer as in claim 1 or 3 wherein: the primary planet carrier (7) and the secondary inner gear ring (13) are integrally formed.

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