CN214331372U

CN214331372U - Planetary reducer capable of axially and automatically eliminating gap

Info

Publication number: CN214331372U
Application number: CN202120079314.0U
Authority: CN
Inventors: 云鹏; 王鸿亮; 赵玉玲; 朱雪松
Original assignee: Shandong Liren Intelligent Technology Co ltd
Current assignee: Shandong Liren Intelligent Technology Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-10-01
Anticipated expiration: 2031-01-12

Abstract

The utility model belongs to the technical field of planetary reducer, concretely relates to planetary reducer in axial automatic clearance elimination, including the casing, be equipped with planetary reduction mechanism in the casing, planetary reduction mechanism includes the ring gear, planet carrier, planet wheel and sun gear, and each planet wheel sets up in the ring gear and the equipartition around the sun gear, and the planet wheel passes through planet carrier interconnect and forms the planet wheel subassembly, and planet wheel subassembly periphery has the tapering, and the ring gear is the tapering ring gear with planet wheel subassembly looks adaptation, and the ring gear can produce axial displacement in the casing. The planetary speed reducing mechanism is divided into two stages, the taper directions of the first-stage inner gear ring and the second-stage inner gear ring are opposite, and a bidirectional stress balancing mechanism is arranged between the first-stage inner gear ring and the second-stage inner gear ring to enable the first-stage inner gear ring and the second-stage inner gear ring to generate axial displacement in the same direction in the machine shell. The transmission precision of the planetary reducer is greatly improved, the service life is greatly prolonged, and the common problems of the conventional planetary reducer are solved subversively.

Description

Planetary reducer capable of axially and automatically eliminating gap

Technical Field

The utility model relates to an axial automatic elimination clearance's planetary reducer belongs to planetary reducer technical field.

Background

The planetary reducer is an industrial product with wide application, and can reduce the rotating speed of a motor and increase the output torque. In the existing planetary reducer structure on the market, the inner gear ring is a rigid gear ring and is connected with the rear end cover into a whole through a bolt, the inner gear ring can be gradually worn along with the prolonging of the service time, the transmission gap can be larger and larger, the reverse gap of the reducer is larger and larger, the transmission precision is reduced, the noise in the working process is increased, and the reducer can not work normally even in serious conditions.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the planetary reducer overcomes the defects of the prior art, and provides the planetary reducer with the self-adaptive inner gear ring and capable of axially and automatically eliminating the gap so as to solve the problems.

Radial automatic planetary gear train who eliminates clearance, including the casing, be equipped with planetary reduction mechanism in the casing, planetary reduction mechanism includes ring gear, planet carrier, planet wheel and sun gear, and each planet wheel sets up in the ring gear and the equipartition around the sun gear, the planet wheel passes through planet carrier interconnect and forms the planet wheel subassembly, planet wheel subassembly periphery has the tapering, the ring gear for with the tapering ring gear of planet wheel subassembly looks adaptation, the ring gear can produce axial displacement in the casing.

Radial force generated by axial movement of the taper inner gear ring acts on the planet wheel and then acts on the sun wheel, so that a transmission gap between the gears is eliminated.

The planetary speed reducing mechanism is divided into two stages, the taper directions of the first-stage inner gear ring and the second-stage inner gear ring are opposite, and a bidirectional stress balancing mechanism is arranged between the first-stage inner gear ring and the second-stage inner gear ring, so that the first-stage inner gear ring and the second-stage inner gear ring generate axial displacement in the same direction in the machine shell.

The utility model discloses a second grade planet reduction gears is equipped with axial self-adaptation ring gear, this ring gear is the tapering ring gear, install two-way atress balance mechanism at second grade tapering ring gear intermediate junction position, when any one of them tapering ring gear produces axial displacement, force another tapering ring gear to produce the syntropy displacement, but because the axial position axial deviation of planet wheel, the radial force that produces by ring gear axial displacement can act on the planet wheel, then act on the sun gear, thereby eliminate the transmission clearance between the gear, the transmission precision that makes the speed reducer improves greatly.

Bidirectional stress balance mechanism include at least a pair of tooth cam of taking, two gear parts meshing of taking the tooth cam are in the same place, two tops of taking the tooth cam are butt one-level ring gear and second grade ring gear respectively. As shown in fig. 4, when an external force is applied to point C, point B is forced in the same direction by the toothed cam structure. When the force direction of the point B is limited, the acting force is reversely transmitted back to the point C through the toothed cam structure, and the consistent pressure of the point B, C is ensured. Due to the relation of the eccentric cam, the radial force of the first-stage taper inner gear ring and the second-stage taper inner gear ring acting on the first-stage planet gear is always kept consistent, so that the gear transmission clearance of the first-stage planet speed reducer and the second-stage planet speed reducer is eliminated, and the elimination amplitude of the clearance is also consistent.

The toothed cam is rotatably arranged on a pin shaft, and the pin shaft is fixed on an outer ring of the needle bearing (as shown in figures 2 and 4).

The toothed cams are provided with a plurality of pairs, and the plurality of pairs of toothed cams are uniformly distributed on an outer ring of the needle bearing (as shown in figure 3).

The needle bearing is sleeved on the support ring, and the support ring is used for radially and axially positioning the needle bearing; the middle bearing is sleeved on the first-stage planet carrier and supports and positions the support ring.

The front end of the secondary planetary reduction mechanism is provided with an output bearing, and the rear end of the secondary planetary reduction mechanism is provided with a positioning bearing and an input bearing; the output bearing is sleeved on the secondary planet carrier, the input bearing is arranged outside the primary sun gear, the positioning bearing is arranged outside the input bearing, and the output bearing, the positioning bearing and the input bearing perform radial and axial positioning on the secondary planet speed reducing mechanism.

Compared with the prior art, the utility model beneficial effect who has is:

but planetary reducer in axial automatic elimination clearance, structural design is reasonable ingenious, the ring gear axial can be removed, because eccentric cam's relation, the radial force that a second grade tapering ring gear acted on a second grade planet wheel remains unanimous all the time to eliminate a second grade planet decelerator's gear drive clearance, and the elimination range in clearance is also unanimous. The transmission precision of the planetary reducer is greatly improved, the service life is greatly prolonged, the common problems of the existing planetary reducer are solved subversively, the development prospect is wide, and good economic and social benefits are achieved.

Drawings

FIG. 1 is a schematic view of a half-section structure of the present invention;

FIG. 2 is a partial enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic diagram of the positional relationship between the bidirectional force-balancing mechanism and the needle bearings;

fig. 4 is a schematic diagram of a bidirectional force-balancing mechanism.

In the figure: 1. an output shaft; 2. a secondary planet carrier; 3. framework oil seal; 4. an output bearing; 5. a secondary planet wheel; 6. a front housing; 7. a secondary annular gear; 8. a support ring; 9. a middle bearing; 10. a primary planet carrier; 11. a primary annular gear; 12. a primary planet wheel; 13. positioning the bearing; 14. an input bearing; 15. an input shaft jacket; 16. a primary sun gear; 17. a secondary sun gear; 18. a toothed cam; 19. a pin shaft; 20. a needle bearing.

Detailed Description

The invention will be further described with reference to the following examples:

as shown in figures 1-4, the planetary reducer capable of axially and automatically eliminating the clearance comprises a shell, wherein the shell consists of a front shell 6 and a rear shell, and a framework oil seal 3 is arranged at the front end of the shell. A two-stage planetary reduction mechanism is arranged in the machine shell and comprises a primary inner gear ring 11, a primary planet carrier 10, a primary planet wheel 12 and a primary sun wheel 16, the secondary planetary reduction mechanism comprises a secondary inner gear ring 7, a secondary planet carrier 2, a secondary planet wheel 5 and a secondary sun wheel 17, the primary sun wheel 16 is connected with an input shaft, the input shaft is connected with an input shaft jacket 15 (the input shaft jacket 15 is connected with a motor output shaft), the secondary planet carrier 2 is connected with an output shaft 1, and the primary planet carrier 10 is connected with the secondary sun wheel 17. Each planet wheel is arranged in the inner gear ring and uniformly distributed around the sun wheel, the planet wheels are connected with each other through the planet carrier to form a planet wheel assembly, the periphery of the first-level planet wheel assembly and the second-level planet wheel assembly is provided with a taper, the inner gear ring is a taper inner gear ring matched with the planet wheel assembly, the taper directions of the first-level inner gear ring 11 and the second-level inner gear ring 7 are opposite, and a bidirectional stress balance mechanism is arranged between the first-level inner gear ring 11 and the second-level inner gear ring 7 to enable the first-level inner gear ring 11 and the second-level inner gear ring 7 to generate axial displacement in the same direction in the machine shell.

The bidirectional stress balance mechanism comprises toothed cams 18, gear parts of the two toothed cams 18 are meshed together, and the top ends of the two toothed cams 18 are respectively abutted to the primary inner gear ring 11 and the secondary inner gear ring 7. The toothed cam 18 is rotatably arranged on a pin 19, and the pin 19 is fixed on an outer ring of a needle bearing 20. The toothed cams 18 are provided in pairs, and a plurality of the toothed cams 18 are uniformly distributed on the outer ring of the needle bearing 20.

The needle bearing 20 of the embodiment is sleeved on the support ring 8, and the support ring 8 carries out radial and axial positioning on the needle bearing 20; the planet carrier further comprises an intermediate bearing 9, the intermediate bearing 9 is sleeved on the first-stage planet carrier 10, and the intermediate bearing 9 supports and positions the support ring 8. The front end of the secondary planetary reduction mechanism is provided with an output bearing 4, and the rear end is provided with a positioning bearing 13 and an input bearing 14; the output bearing 4 is sleeved on the secondary planet carrier 2, the input bearing 14 is arranged outside the primary sun gear 16, the positioning bearing 13 is arranged outside the input bearing 14, and the output bearing 4, the positioning bearing 13 and the input bearing 14 are used for radially and axially positioning the secondary planet speed reducing mechanism. The shell is matched with the output bearing 4, the middle bearing 9, the positioning bearing 13 and the input bearing 14 to position components in the shell 5, and the problem of positioning of internal components is solved ingeniously.

The utility model discloses a two-stage planetary reduction gear is equipped with axial self-adaptation ring gear, and this ring gear is the tapering ring gear, installs two-way stress balance mechanism at two-stage tapering ring gear intermediate junction position-eccentric cam, through taking tooth cam structure when external force is applyed to C point, and B point can produce the syntropy atress. When the force direction of the point B is limited, the acting force is reversely transmitted back to the point C through the tooth cam structure, and the consistent pressure of the point B, C is ensured. When any one of the taper inner gear rings generates axial displacement, the eccentric cam is forced to rotate, so that the other taper inner gear ring is triggered to generate equidirectional displacement, and as the axial position of the planet wheel cannot be axially offset, radial force generated by the axial movement of the inner gear ring acts on the planet wheel and then acts on the sun wheel, so that a transmission gap between the gears is eliminated, and the transmission precision of the speed reducer is greatly improved. Due to the relation of the eccentric cam, the radial force of the first-stage taper inner gear ring and the second-stage taper inner gear ring acting on the first-stage planet gear is always kept consistent, so that the gear transmission clearance of the first-stage planet speed reducer and the second-stage planet speed reducer is eliminated, and the elimination amplitude of the clearance is also consistent. The transmission precision of the planetary reducer is greatly improved, the service life is greatly prolonged, the common problems of the existing planetary reducer are solved subversively, and the economic and social benefits are remarkable.

Claims

1. The utility model provides an axial automatic elimination clearance's planetary reducer, includes the casing, is equipped with planetary reduction gears in the casing, and planetary reduction gears includes ring gear, planet carrier, planet wheel and sun gear, and each planet wheel sets up in the ring gear and the equipartition is around the sun gear, and the planet wheel passes through planet carrier interconnect and forms planet wheel subassembly, its characterized in that: the periphery of the planet wheel component is provided with a taper, the inner gear ring is a taper inner gear ring matched with the planet wheel component, and the inner gear ring can generate axial displacement in the machine shell.

2. The planetary reducer according to claim 1, wherein the axial direction is a direction substantially perpendicular to the axial direction, and the clearance is automatically eliminated: the planetary speed reducing mechanism is divided into two stages, the taper directions of the first-stage inner gear ring (11) and the second-stage inner gear ring (7) are opposite, and a bidirectional stress balancing mechanism is arranged between the first-stage inner gear ring (11) and the second-stage inner gear ring (7) to enable the first-stage inner gear ring (11) and the second-stage inner gear ring (7) to generate axial displacement in the same direction in the casing.

3. The planetary reducer according to claim 2, wherein the axial direction is a direction substantially perpendicular to the axial direction, and the clearance is automatically eliminated: the bidirectional stress balance mechanism comprises at least one pair of toothed cams (18), gear parts of the two toothed cams (18) are meshed together, and the top ends of the two toothed cams (18) are respectively abutted to the primary inner gear ring (11) and the secondary inner gear ring (7).

4. The planetary reducer according to claim 3, wherein the axial direction is a direction substantially perpendicular to the axial direction, and the clearance is automatically eliminated: the toothed cam (18) is rotationally arranged on a pin shaft (19), and the pin shaft (19) is fixed on an outer ring of the needle bearing (20).

5. The planetary reducer according to claim 4, wherein the axial direction is a direction substantially perpendicular to the axial direction, and the clearance is automatically eliminated: the toothed cams (18) are provided with a plurality of pairs, and the toothed cams (18) are uniformly distributed on an outer ring of the needle bearing (20).

6. The planetary reducer according to claim 4 or 5, wherein: the needle roller bearing (20) is sleeved on the support ring (8), and the support ring (8) is used for radially and axially positioning the needle roller bearing (20); the planet carrier is characterized by further comprising an intermediate bearing (9), wherein the intermediate bearing (9) is sleeved on the first-stage planet carrier (10), and the intermediate bearing (9) supports and positions the support ring (8).

7. The planetary reducer according to claim 2, wherein the axial direction is a direction substantially perpendicular to the axial direction, and the clearance is automatically eliminated: the front end of the secondary planetary reduction mechanism is provided with an output bearing (4), and the rear end is provided with a positioning bearing (13) and an input bearing (14); the output bearing (4) is sleeved on the secondary planet carrier (2), the input bearing (14) is arranged outside the primary sun gear (16), the positioning bearing (13) is arranged outside the input bearing (14), and the output bearing (4), the positioning bearing (13) and the input bearing (14) are used for radially and axially positioning the secondary planet speed reducing mechanism.