CN219529771U - Helical tooth planetary reducer - Google Patents
Helical tooth planetary reducer Download PDFInfo
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- CN219529771U CN219529771U CN202320664158.3U CN202320664158U CN219529771U CN 219529771 U CN219529771 U CN 219529771U CN 202320664158 U CN202320664158 U CN 202320664158U CN 219529771 U CN219529771 U CN 219529771U
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Abstract
The utility model discloses a helical gear planetary reducer, which comprises a box body, wherein a speed regulating gear mechanism is arranged in the box body; the box body comprises an annular gear, a front end cover and a rear end cover, wherein the front end cover is in sealing connection with the annular gear, and the rear end cover is in sealing connection with the annular gear; the speed regulating gear mechanism comprises a planet carrier, a helical sun gear and three helical planet gears, wherein the planet carrier is coaxially and rotatably arranged in an inner gear ring, the three helical planet gears are respectively and rotatably arranged on the planet carrier, each helical planet gear is in meshed connection with the inner gear ring, the helical sun gear is positioned between the three helical planet gears and in meshed connection with each helical planet gear, and an input shaft is coaxially and fixedly connected to the helical sun gear. The bearing has the advantages that the bearing absorbs the axial force generated in the working process of the helical gear sun gear, the structure is simple, and the service life of the speed reducer is effectively prolonged.
Description
Technical Field
The utility model relates to a speed reducer, in particular to a helical gear planetary speed reducer.
Background
The planetary speed reducer for the injection molding machine belongs to a heavy-duty series, usually requires unidirectional rotation, has large output torque, has a reduction ratio of 6-10, and according to the characteristic requirements, adopts a straight-tooth planetary speed reducer or a helical-tooth planetary speed reducer, the transmission efficiency of the helical-tooth planetary speed reducer is better than that of the straight-tooth planetary speed reducer, and the noise of the helical-tooth planetary speed reducer in the working process is smaller than that of the straight-tooth planetary speed reducer, so that most injection molding machine manufacturers select to use the helical-tooth planetary speed reducer. Because the helical gear planetary reducer adopts helical gear planetary reduction, the sun gear can generate axial force in the running process of the reducer, and the axial force is not eliminated, so that the sun gear can axially move towards the rotating direction to be separated from the gear pair, and the gear is damaged. Currently, for such axial force cancellation, the following two methods are conventionally adopted: firstly, a wear-resistant block is embedded between the end face of a sun gear and a planet carrier, and the axial force is absorbed by means of end face friction, so that scrap iron is easily worn for a long time, and the service life of a speed reducer is reduced; secondly, the sun gear is propped against the servo motor end for driving the speed reducer, the axial force is absorbed by the output shaft of the servo motor, the bearing capacity requirement of the bearing arranged on the front end cover of the servo motor is higher, the bearing of the standard servo motor obviously cannot meet the requirement and is easy to damage, the servo motor is scrapped, that is to say, the bearing of the front end cover of the servo motor needs to be enlarged in the mode, the servo motor needs to be made into nonstandard design, and the cost is increased.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the helical tooth planetary reducer which is simple in structure and good in service life.
The technical scheme adopted for solving the technical problems is as follows:
the helical tooth planetary reducer comprises a box body, wherein a speed regulating gear mechanism is arranged in the box body;
the box body comprises an inner gear ring which is penetrated from front to back, a front end cover is arranged at the front end of the inner gear ring and is in sealing connection with the inner gear ring, a rear end cover is arranged at the rear end of the inner gear ring and is in sealing connection with the inner gear ring;
the speed regulating gear mechanism comprises a planet carrier, a helical sun gear and three helical planet gears, wherein the planet carrier is coaxially and rotatably arranged in the inner gear ring, the three helical planet gears are respectively and rotatably arranged on the planet carrier, each helical planet gear is meshed with the inner gear ring, the helical sun gear is positioned among the three helical planet gears and meshed with each helical planet gear, and the helical sun gear is coaxially and fixedly connected with an input shaft;
the input shaft is rotatably connected with the planet carrier through a bearing.
The bearing is a four-point angular contact bearing. The four-corner contact bearing can bear axial load and radial load, the occupied axial space is small, and the two inner rings can be independently installed respectively, so that the installation is convenient. And the four-point contact ball bearing has high allowable rotation speed, and is more suitable for the rotation speed requirement of the sun gear of the speed reducer.
The planet carrier on coaxial fixedly connected with output shaft, the planet carrier include the drive ring, the coaxial rotatable installation of drive ring be in the ring gear, the front end of drive ring be provided with preceding connecting portion, the output shaft fixedly set up in preceding connecting portion, the rear end of drive ring be provided with back connecting portion, back connecting portion be provided with around link up with the coaxial connecting chamber of output shaft, the helical tooth sun gear stretch into through the connecting chamber in and the meshing setting is in between three the helical tooth planet wheel, the connecting chamber with the input shaft between be provided with the bearing, the lateral part of drive ring be provided with supply the helical tooth planet wheel expose with the opening of ring gear meshing connection, the helical tooth rotationally install through the planet axle on the carrier, the planet axle fixed mounting be in between preceding connecting portion and the back connecting portion. The planet carrier is simple in structure, and stable installation of the helical sun gear and the helical planet gear on the planet carrier is realized.
The helical planet gears are rotatably connected with the corresponding planet shafts through rotating connection bearings. The rotatable connection structure for the two is simple, low in cost and stable.
The box body is internally provided with an annular cooling flow passage, and the box body is provided with a cooling inlet which is communicated with the annular cooling flow passage and is used for entering an external liquid cooling medium and a cooling outlet which is used for allowing the liquid cooling medium entering the annular cooling flow passage to flow out of the liquid cooling medium taking heat away through heat exchange. Through setting up annular cooling runner in the box, and be provided with on the box with the cooling import and the cooling export that this annular cooling runner is linked together, outside liquid cooling medium accessible cooling import enters into the box and flows in annular cooling runner, helps the speed reducer heat dissipation through the heat exchange, flows from the cooling export after the heat exchange to help the high-efficient heat dissipation of speed reducer, help further extension speed reducer's life.
The cooling inlet and the cooling outlet are arranged close to each other. The residence time of the liquid cooling medium in the annular cooling flow passage is effectively prolonged, and the full utilization of the temperature of the liquid cooling medium can be realized, so that the heat dissipation effect is improved.
The front end cover is provided with a front positioning ring which can extend into the inner gear ring, the front positioning ring extends into the inner gear ring, the front positioning ring is in sealing connection with the inner gear ring through an annular sealing piece, and the front connecting part is in rotatable connection with the front positioning ring through a first connecting bearing. The structure realizes stable sealing connection between the front end cover and the annular gear, and simultaneously realizes that the planet carrier is stably and rotatably arranged in the box body.
The rear end cover is provided with a rear positioning ring which can extend into the inner gear ring, the rear positioning ring extends into the inner gear ring, the outer wall of the rear positioning ring is concavely provided with an annular cooling flow passage, and the cooling inlet and the cooling outlet are respectively arranged on the inner gear ring at intervals and are communicated with the annular cooling flow passage. The structure not only realizes stable sealing connection between the rear end cover and the annular gear, but also provides stable setting space for the annular cooling flow passage through the rear positioning ring.
The outer wall of the rear positioning ring is provided with an annular first sealing groove, the inner wall of the inner gear ring is provided with an annular second sealing groove, the annular cooling flow passage is arranged between the first sealing groove and the second sealing groove, and annular sealing elements are respectively arranged in the first sealing groove and the second sealing groove. A stable seal is achieved.
The rear positioning ring is internally provided with an annular connecting seat, and the annular connecting seat is rotatably connected with the rear connecting part through a second connecting bearing. The planet carrier can be stably and rotatably installed in the box body through the annular connecting seat.
The input shaft is provided with a limiting ring in a protruding mode, and the limiting ring is arranged behind the second connecting bearing and plays a limiting role on the installation position of the second connecting bearing. The stable installation of the bearing is ensured, and the bearing is ensured to play an effective role.
Compared with the prior art, the utility model has the advantages that: the bearing is arranged between the input shaft on the helical gear and the planet carrier, the helical gear is rotatably mounted on the planet carrier through the bearing, friction between the end face of the helical gear and the planet carrier in the working process is avoided, and meanwhile, axial force generated in the working process of the helical gear is absorbed through the bearing, so that the structure is simple, and the service life of the speed reducer is effectively prolonged.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is a schematic perspective view of a reduction gear mechanism and an inner race in the present utility model;
FIG. 4 is a schematic perspective view of a reduction gear mechanism according to the present utility model;
FIG. 5 is a first cross-sectional schematic view of a reduction gear mechanism of the present utility model;
FIG. 6 is a second cross-sectional schematic view of a reduction gear mechanism of the present utility model;
fig. 7 is a schematic perspective view of a planet carrier according to the present utility model.
Description of the embodiments
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in the figure, the helical tooth planetary reducer comprises a box body, wherein a speed regulating gear mechanism is arranged in the box body;
the box body comprises an inner gear ring 1 which penetrates through the box body from front to back, a front end cover of the inner gear ring 1 is provided with a front end cover 2, the front end cover 2 is connected with the inner gear ring 1 in a sealing way, a rear end cover 3 is arranged at the rear end cover of the inner gear ring 1, and the rear end cover 3 is connected with the inner gear ring 1 in a sealing way;
the speed regulating gear mechanism comprises a planet carrier 4, a helical sun gear 5 and three helical planet gears 6, wherein the planet carrier 4 is coaxially and rotatably arranged in the internal gear 1, the three helical planet gears 6 are respectively rotatably arranged on the planet carrier 4, each helical planet gear 6 is in meshed connection with the internal gear 1, the helical sun gear 5 is positioned among the three helical planet gears 6 and in meshed connection with each helical planet gear 6, and an input shaft 51 is coaxially and fixedly connected to the helical sun gear 5;
the input shaft 51 is rotatably connected to the carrier 4 via a bearing 7.
In this embodiment, the bearing 7 is a four-point angular contact bearing. The four-corner contact bearing can bear axial load and radial load, the occupied axial space is small, and the two inner rings can be independently installed respectively, so that the installation is convenient. And the four-point contact ball bearing has high allowable rotation speed, and is more suitable for the rotation speed requirement of the sun gear of the speed reducer.
In this specific embodiment, the planet carrier 4 is coaxially and fixedly connected with the output shaft 41, the planet carrier 4 comprises a driving ring 401, the driving ring 401 is coaxially and rotatably installed in the ring gear 1, the front end of the driving ring 401 is provided with a front connecting part 402, the output shaft 41 is fixedly arranged on the front connecting part 402, the rear end of the driving ring 401 is provided with a rear connecting part 403, the rear connecting part 403 is provided with a connecting cavity 404 which penetrates through front and rear and is coaxial with the output shaft 41, the helical sun gear 5 extends into the driving ring 401 through the connecting cavity 404 and is meshed between the three helical planet gears 6, a bearing 7 is arranged between the connecting cavity 404 and the input shaft 51, an opening 4011 for the helical planet gears 6 to be exposed and connected with the ring gear 1 is arranged on the side part of the driving ring gear 401, the helical planet gears 6 are rotatably installed on the planet carrier 4 through a planet shaft 405, and the planet shaft 405 is fixedly installed between the front connecting part 402 and the rear connecting part 403. The planet carrier 4 has a simple structure, and realizes stable installation of the helical sun gear 5 and the helical planet gear 6 on the planet carrier.
In this particular embodiment, the rotatable connection between the helical planet 6 and the corresponding planet axle 405 is achieved by means of a rotational connection bearing Z1. The rotatable connection structure for the two is simple, low in cost and stable.
In this embodiment, an annular cooling flow passage 11 is provided in the case, and a cooling inlet 12 for an external liquid cooling medium to enter and a cooling outlet 13 for the liquid cooling medium entering the annular cooling flow passage 11 to flow out the liquid cooling medium taking heat away by heat exchange are provided in the case in communication with the annular cooling flow passage 11. Through setting up annular cooling runner 11 in the box, and be provided with on the box with this annular cooling runner 11 be linked together cool off import 12 and cool off export 13, outside liquid cooling medium accessible cool off import 12 enters into the box and flows in annular cooling runner 11, helps the speed reducer heat dissipation through the heat exchange, flows from cool off export 13 after the heat exchange to help the speed reducer high-efficient heat dissipation, help further extension speed reducer's life.
In this particular embodiment, the cooling inlet 12 and the cooling outlet 13 are disposed in close proximity. The residence time of the liquid cooling medium in the annular cooling flow passage 11 is effectively prolonged, and the full utilization of the temperature of the liquid cooling medium can be realized, so that the heat dissipation effect is improved.
In this embodiment, the front end cover 2 has a front positioning ring 21 that can be inserted into the ring gear 1, the front positioning ring 21 is connected with the ring gear 1 in a sealing manner by an annular seal M1, and the front connection part 402 is connected with the front positioning ring 21 in a rotatable manner by a first connection bearing Z2. The structure realizes stable sealing connection between the front end cover 2 and the annular gear 1, and simultaneously realizes that the planet carrier 4 is stably and rotatably arranged in the box body.
In this embodiment, the rear end cover 3 has a rear positioning ring 31 which can be inserted into the ring gear 1, the rear positioning ring 31 is inserted into the ring gear 1, an annular cooling flow passage 11 is concavely provided on the outer wall of the rear positioning ring 31, and a cooling inlet 12 and a cooling outlet 13 are respectively provided on the ring gear 1 at intervals and communicate with the annular cooling flow passage 11. The structure not only realizes stable sealing connection between the rear end cover 3 and the annular gear 1, but also provides stable setting space for the annular cooling flow passage 11 through the rear positioning ring 31.
In this embodiment, an annular first sealing groove 311 is provided on the outer wall of the rear positioning ring 31, an annular second sealing groove 15 is provided on the inner wall of the ring gear 1, the annular cooling flow passage 11 is provided between the first sealing groove 311 and the second sealing groove 15, and an annular sealing member M1 is provided in each of the first sealing groove 311 and the second sealing groove 15. A stable seal is achieved.
In this embodiment, an annular connecting seat 312 is disposed in the rear positioning ring 31, and the annular connecting seat 312 and the rear connecting portion 403 are rotatably connected by a second connecting bearing Z3. The ring-shaped connecting seat 312 realizes that the planet carrier 4 can be stably and rotatably installed in the box body.
In this embodiment, a limiting ring 511 is disposed on the input shaft 51 in a protruding manner, and the limiting ring 511 is disposed behind the second connection bearing Z3 to limit the installation position of the second connection bearing Z3. The stable installation of the bearing is ensured, and the bearing is ensured to play an effective role.
Claims (10)
1. The helical tooth planetary reducer comprises a box body, wherein a speed regulating gear mechanism is arranged in the box body;
the box body comprises an inner gear ring which is penetrated from front to back, a front end cover is arranged at the front end of the inner gear ring and is in sealing connection with the inner gear ring, a rear end cover is arranged at the rear end of the inner gear ring and is in sealing connection with the inner gear ring;
the speed regulating gear mechanism comprises a planet carrier, a helical sun gear and three helical planet gears, wherein the planet carrier is coaxially and rotatably arranged in the inner gear ring, the three helical planet gears are respectively and rotatably arranged on the planet carrier, each helical planet gear is meshed with the inner gear ring, the helical sun gear is positioned among the three helical planet gears and meshed with each helical planet gear, and the helical sun gear is coaxially and fixedly connected with an input shaft;
the planetary gear is characterized in that the input shaft is rotatably connected with the planet carrier through a bearing.
2. The helical gear planetary reducer of claim 1, wherein said bearing is a four-point angular contact bearing.
3. The helical gear planetary reducer of claim 1, wherein said planet carrier is fixedly connected with an output shaft coaxially, said planet carrier comprises a driving ring, said driving ring is coaxially and rotatably mounted in said ring gear, a front connecting portion is provided at a front end of said driving ring, said output shaft is fixedly mounted on said front connecting portion, a rear connecting portion is provided at a rear end of said driving ring, said rear connecting portion is provided with a connecting cavity penetrating through from front to rear and coaxial with said output shaft, said helical sun gear extends into said driving ring through said connecting cavity and is engaged between three of said helical planet gears, said bearing is provided between said connecting cavity and said input shaft, said side portion of said driving ring is provided with an opening for said helical planet gears to be engaged with said ring gear, said helical planet gears are rotatably mounted on said carrier through said planet shaft, and said shaft is fixedly mounted between said front connecting portion and said rear connecting portion of said planet gears.
4. A helical planet reducer according to claim 3, wherein said helical planet is rotatably coupled to said corresponding planet shaft by means of a rotatable coupling bearing.
5. A helical planetary reducer according to claim 3, wherein an annular cooling flow passage is provided in the housing, and a cooling inlet through which an external liquid cooling medium enters and a cooling outlet through which the liquid cooling medium entering the annular cooling flow passage flows out through heat exchange are provided in the housing, the cooling inlet being communicated with the annular cooling flow passage.
6. A helical tooth planetary reducer as defined in claim 3, wherein said front end cover has a front positioning ring which is inserted into said ring gear, said front positioning ring is in sealing connection with said ring gear via an annular seal, and said front connection portion is in rotatable connection with said front positioning ring via a first connection bearing.
7. The helical gear planetary reducer of claim 5, wherein said rear end cap has a rear retaining ring which is inserted into said ring gear, said rear retaining ring is inserted into said ring gear, said annular cooling channel is concavely provided on the outer wall of said rear retaining ring, said cooling inlet and said cooling outlet are respectively provided on said ring gear at intervals and are communicated with said annular cooling channel.
8. The helical planet speed reducer of claim 7, wherein the outer wall of the rear positioning ring is provided with an annular first sealing groove, the inner wall of the inner gear ring is provided with an annular second sealing groove, the annular cooling flow passage is arranged between the first sealing groove and the second sealing groove, and annular sealing elements are respectively arranged in the first sealing groove and the second sealing groove.
9. The helical planet speed reducer of claim 7, wherein an annular connecting seat is disposed in the rear positioning ring, and the annular connecting seat is rotatably connected with the rear connecting portion through a second connecting bearing.
10. The helical planetary reducer of claim 9, wherein said input shaft is provided with a stop collar, said stop collar being disposed behind said second connecting bearing for limiting the mounting position of said second connecting bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320664158.3U CN219529771U (en) | 2023-03-28 | 2023-03-28 | Helical tooth planetary reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320664158.3U CN219529771U (en) | 2023-03-28 | 2023-03-28 | Helical tooth planetary reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219529771U true CN219529771U (en) | 2023-08-15 |
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ID=87585830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320664158.3U Active CN219529771U (en) | 2023-03-28 | 2023-03-28 | Helical tooth planetary reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219529771U (en) |
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2023
- 2023-03-28 CN CN202320664158.3U patent/CN219529771U/en active Active
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