CN112145630A - Planetary gear reducer with planet carrier positioning mechanism - Google Patents
Planetary gear reducer with planet carrier positioning mechanism Download PDFInfo
- Publication number
- CN112145630A CN112145630A CN202011028435.9A CN202011028435A CN112145630A CN 112145630 A CN112145630 A CN 112145630A CN 202011028435 A CN202011028435 A CN 202011028435A CN 112145630 A CN112145630 A CN 112145630A
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- CN
- China
- Prior art keywords
- wheel
- gear
- planetary
- planetary gear
- planet
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H2001/2881—Toothed gearings for conveying rotary motion with gears having orbital motion comprising two axially spaced central gears, i.e. ring or sun gear, engaged by at least one common orbital gear wherein one of the central gears is forming the output
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The patent provides a planetary gear reducer with planet carrier positioning mechanism, it plays radial location to the planet carrier through rotating the tangent structure of supporting wheel and the supporting seat that sets up on the planet carrier, prevents the radial drunkenness of planet carrier and planet wheel, improves planetary gear reducer performance. The planetary gear set comprises a shell, sun gears, planetary gears and a planetary carrier, wherein the sun gears are provided with two coincident axes, namely a first sun gear fixed on the shell and a second sun gear rotating relative to the shell, the planetary gears are at least provided with three groups, each group of planetary gears comprises a first planetary gear and a second planetary gear which are respectively meshed with the first sun gear and the second sun gear, the coaxial fixed phase of the first planetary gear and the second planetary gear is connected with each other and is rotatably arranged on the planetary carrier, a supporting wheel is rotatably arranged on the planetary carrier, a cylindrical supporting seat coaxial with the sun gears is arranged on the shell, the first sun gear or the second sun gear, and the supporting wheel is tangent to the excircle of the supporting seat.
Description
Technical Field
The patent relates to a planetary gear reducer, in particular to a planetary gear reducer capable of radially positioning a planet wheel and a planet carrier.
Background
The planetary gear reducer has the characteristics of small volume and high bearing capacity, is generally applied, and particularly has lower cost and higher precision because an internal gear is not used in the planetary gear reducer with a double-sun gear and double-linkage planetary gear structure. Since the gear transmission needs to design the tooth side clearance so as to ensure high transmission efficiency, the planet carrier needs to have radial positioning so as to prevent the radial offset of the planet wheels and the planet carrier from causing vibration, abnormal abrasion and the like. In a general planetary gear reducer with double sun gears and double planet gears, as shown in fig. 1, the first sun gear 21 is a fixed gear, the second sun gear 22 is an output gear, at one end of the output gear, the planet carrier 25 is supported on the casing 100 by using the second bearing 42, and at one end of the fixed gear, due to the influence of the fixed gear, the planet carrier 25 needs to be supported on the casing 100 by using the first bearing 41 with a larger size specification, which is difficult to meet the requirement due to the rotating speed of the large bearing when applied to a high-speed transmission occasion, so that the application of the reducer in the high-speed transmission is limited.
Disclosure of Invention
The purpose of this patent is to provide a planetary gear reducer with planet carrier positioning mechanism, and it plays radial location to the planet carrier through rotating the tangent structure of supporting wheel and the supporting seat that sets up on the planet carrier, prevents the radial drunkenness of planet carrier and planet wheel, improves planetary gear reducer performance.
In order to achieve the above object, the planetary gear reducer with the planet carrier positioning mechanism of the patent comprises a shell, a sun gear, planet gears, a planet carrier, and two sun gears with coincident axes, namely a first sun gear fixed on the shell and a second sun gear rotating relative to the shell, wherein the planet gears are at least provided with three groups, each group of planet gears comprises a first planet gear and a second planet gear which are respectively meshed with the first sun gear and the second sun gear, the first planet gear and the second planet gear are coaxially fixed and are fixedly connected with each other and are rotatably arranged on the planet carrier, a supporting wheel is rotatably arranged on the planet carrier, a cylindrical supporting seat coaxial with the sun gear is arranged on the shell, the first sun gear or the second sun gear, and the supporting wheel is tangent to the excircle of the supporting seat.
In the planetary gear reducer, the first planetary gear and the second planetary gear are combined into a whole, and the planetary gear reducer is an integral gear.
In the planetary gear reducer described above, the first planetary gear and the second planetary gear are two gears having different gear parameters.
In the planetary gear reducer, the supporting wheel is coaxially and fixedly connected with the first planet wheel or the second planet wheel.
In the planetary gear reducer, the outer diameter of the supporting wheel is equal to the pitch circle diameter of the first planetary gear, and the outer diameter of the supporting seat is equal to the pitch circle diameter of the first sun gear. So that abrasion caused by relative sliding between the supporting wheel and the tangent outer cylindrical surface of the supporting seat can be avoided,
in the planetary gear reducer, each group of planetary gear sets are uniformly distributed on the same circumference.
The beneficial effect of this patent: during operation, the supporting wheel revolves under the drive of the planet carrier and rotates relative to the planet carrier, and in the process, the supporting wheel is tangent to the supporting seat all the time, so that the radial positioning is realized on the planet carrier, the radial movement of the planet carrier and the planet wheel is prevented, and the performance of the planetary gear reducer is improved. Meanwhile, the supporting wheel and the planet wheel are coaxial and are positioned in the circumferential direction of the sun wheel, so that the outer diameter of the supporting wheel is smaller, the supporting wheel can be rotatably arranged on the planet carrier through a small bearing with a smaller outer diameter, and the planet gear reducer can be used in high-speed transmission occasions.
Drawings
Fig. 1 is a schematic diagram of a conventional planetary gear reducer.
Fig. 2 is a schematic diagram of a planetary gear reducer having a positioning mechanism.
Fig. 3 is a schematic diagram of relative positions of the supporting wheels and the supporting seat.
Fig. 4 is a schematic view of the relative position of the support wheel and the first planet wheel.
Figure 5 is a schematic view of the support wheel tangent to the outer circumference of the support base.
Figure 6 is a schematic view of a support wheel tangential to the periphery of the support base.
Figure 7 is a schematic view of an alternative support wheel tangential to the outer periphery of the support base.
In the figure, a casing 100, a first sun gear 21, a second sun gear 22, a first planetary gear 23, a second planetary gear 24, a carrier 25, and a planetary gear shaft 26;
a first bearing 41, a second bearing 42, a third bearing 43, and a fourth bearing 44; supporting wheel 5, supporting seat 6.
Detailed Description
Example 1:
referring to fig. 2, the planetary gear reducer with a carrier positioning mechanism mainly includes a first sun gear 21, a second sun gear 22, a first planetary gear 23, a second planetary gear 24, a carrier 25, a planetary gear shaft 26, a support wheel 5, a support base 6, a second bearing 42, a third bearing 43, and a fourth bearing 44.
The first planet wheel 23 and the second planet wheel 24 are respectively meshed with the first sun wheel 21 and the second sun wheel 22, are coaxially fixed and are rotatably arranged on a planet wheel shaft 26 through a third bearing 43 to form a planet wheel set. There are at least three planetary gear sets (see fig. 3) uniformly distributed on the same circumference. The planetary gear shaft 26 is fixed to the carrier 25. The first sun gear 21 fixed to the housing 100 and the second sun gear 22 rotated relative to the housing by a bearing are axially overlapped.
The supporting wheel 5 which is coaxial with the first planet wheel is rotationally arranged on the planet wheel shaft 26 through a fourth bearing 44, a cylindrical supporting seat 6 which is coaxial with the first sun wheel is arranged on the shell or/and the first sun wheel, and the supporting wheel is tangent with the excircle of the supporting seat. The outer diameter of the support wheel 5 is equal to the pitch diameter of the first planet wheel 23 and the outer diameter of the support seat 6 is equal to the pitch diameter of the first sun wheel 21.
The first planet wheel 23 and the second planet wheel 24 can be a whole gear which is combined into a whole, or can be two gears with different gear parameters.
Example 2: example 2 differs from example 1 mainly in that: the support wheel 5 is fixedly connected coaxially with the first planet wheel 23. In this case, the support wheel 5 is fixedly connected to the first planet wheel 23, and the third bearing is provided between the first planet wheel and the planet wheel shaft, so that the fourth bearing may not be provided between the support wheel 5 and the planet wheel shaft 26.
Example 3: example 3 differs from example 1 mainly in that: the supporting wheel 5 tangent to the outer circle of the supporting seat 6 is rotatably arranged on the planet carrier through a fourth bearing 44 and is not coaxial with the first planet wheel 23.
The planetary gear reducer of this patent is a no internal gear's two sun gear and planetary gear reducer of pair planet wheel structure, be equipped with the coaxial cylindrical supporting wheel of planet wheel, still be equipped with the coaxial cylindrical supporting seat of sun gear, two cylindrical structure excircles are tangent and are relative rolling surface.
The cylindrical supporting wheel coaxial with the planet wheel can be fixedly connected with the planet wheel, and in order to avoid abrasion caused by relative sliding between the two cylindrical surfaces, the preferred design scheme is as follows: the supporting wheel is coaxial with the planet wheel, the outer diameter of the supporting wheel is equal to the pitch circle diameter of the first planet wheel meshed with the fixed first sun wheel, the supporting seat is coaxial with the fixed first sun wheel, and the outer diameter of the supporting wheel is equal to the pitch circle diameter of the first sun wheel.
The supporting seat coaxial with the sun gear can be an independent part, can be integrated with the first sun gear, and can be integrated with the shell.
The supporting wheel coaxial with the planet wheel can also be independently (not fixed with the planet wheel) rotatably arranged on the planet wheel shaft, and is supported on the planet wheel shaft by using a bearing.
At least three supporting wheels coaxial with the planet wheel and a supporting seat coaxial with the sun wheel form a positioning mechanism for positioning the planet wheel, so that the track at the center of the planet wheel is relatively fixed, the radial play of the planet wheel and the planet carrier is avoided, and the performance of the speed reducer is improved.
The specific structure of the planet carrier does not affect the scope of protection of the claims of this patent.
The planetary gear reducer can be used as a planet carrier as an input element and a rotating second sun gear as an output element, or vice versa, and the protection scope of the claims of the patent is not influenced;
the supporting wheel can be coaxial with the planet wheel or not. The joint surface (phase section) of the supporting wheel and the supporting seat can be a cylindrical surface, a profile surface, an arc surface, a conical surface and the like, and can also be a combination of the cylindrical surface, the profile surface and the profile surface, and the shape of the joint surface of the supporting wheel and the profile surface does not influence the protection scope of the claims of the patent; for example, the support wheel 5 is directly tangent to the periphery of the support seat 6, the tangent plane being a V-profile (see fig. 5), or the phase section being a conical profile (see fig. 6), or the phase section being an arc-shaped plane (see fig. 7).
The support of the planet wheels, the first sun wheel, the planet wheel carrier, etc., such as whether or not a bearing is used and what kind of bearing is used, does not affect the scope of protection of the claims of this patent.
Claims (6)
1. Planetary gear reducer with planet carrier positioning mechanism, including casing, sun gear, planet wheel, planet carrier, characterized by: the planetary gear set comprises at least three groups of planetary gears, each group of planetary gears comprises a first planetary gear and a second planetary gear which are respectively meshed with the first sun gear and the second sun gear, the first planetary gear and the second planetary gear are coaxially fixed and rotatably arranged on a planetary frame, a supporting wheel is rotatably arranged on the planetary frame, a cylindrical supporting seat coaxial with the sun gear is arranged on the shell, the first sun gear or the second sun gear, and the supporting wheel is tangent to the excircle of the supporting seat.
2. The planetary gear reducer according to claim 1, wherein: the first planet wheel and the second planet wheel are combined into a whole, and the whole gear is formed.
3. The planetary gear reducer according to claim 1, wherein: the first planet gear and the second planet gear are two gears having different gear parameters.
4. The planetary gear reducer according to claim 1, wherein: the supporting wheel is coaxially and fixedly connected with the first planet wheel or the second planet wheel.
5. The planetary gear reducer according to claim 1, wherein: the supporting wheel external diameter equals the pitch circle diameter of first planet wheel, and the external diameter of supporting seat equals the pitch circle diameter of first sun gear.
6. The planetary gear reducer according to claim 1, wherein: all the planetary wheel sets are uniformly distributed on the same circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011028435.9A CN112145630A (en) | 2020-09-26 | 2020-09-26 | Planetary gear reducer with planet carrier positioning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011028435.9A CN112145630A (en) | 2020-09-26 | 2020-09-26 | Planetary gear reducer with planet carrier positioning mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112145630A true CN112145630A (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011028435.9A Pending CN112145630A (en) | 2020-09-26 | 2020-09-26 | Planetary gear reducer with planet carrier positioning mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN112145630A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833146A (en) * | 2021-03-08 | 2021-05-25 | 南京好龙电子有限公司 | External meshing planetary gear mechanism with high transmission efficiency |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4468985A (en) * | 1977-11-29 | 1984-09-04 | Skf Nova Ab | Planetary gearing system |
| JPH0814369A (en) * | 1994-06-24 | 1996-01-16 | Nippon Seiko Kk | Rotation supporting device for epicyclic gear |
| JPH09303494A (en) * | 1996-05-21 | 1997-11-25 | Harmonic Drive Syst Ind Co Ltd | Planetary gear device |
| US5692989A (en) * | 1996-06-06 | 1997-12-02 | Kamlukin; Igor | Self aligning planetary gear transmission & speed reducer |
| US20090221397A1 (en) * | 2006-05-22 | 2009-09-03 | Demtroeder Jens | Gear System for a Wind Turbine |
| CN201410878Y (en) * | 2009-06-19 | 2010-02-24 | 一拖(洛阳)开创装备科技有限公司 | Final drive gear of enclosed double-bracing planetary gear used in drive axle |
| CN202280797U (en) * | 2011-09-26 | 2012-06-20 | 中国航空工业第六一八研究所 | Planetary reduction gear with high bearing ability |
| WO2012128003A1 (en) * | 2011-03-24 | 2012-09-27 | Ntn株式会社 | Cycloid decelerator and in-wheel motor drive device |
| JP2012202449A (en) * | 2011-03-24 | 2012-10-22 | Ntn Corp | Planetary gear device |
| CN203214782U (en) * | 2013-04-11 | 2013-09-25 | 四川理工学院 | Built-in planet deceleration joint |
| CN203214784U (en) * | 2013-02-28 | 2013-09-25 | 沈观耕 | Planetary gear speed reducer with primary planet carrier and secondary planet carrier meshing mechanism |
| CN104500661A (en) * | 2015-01-15 | 2015-04-08 | 重庆大学 | Composite high-order cycloidal planetary transmission device |
| CN104520182A (en) * | 2012-10-18 | 2015-04-15 | 三菱重工业株式会社 | Steering gear and ship provided therewith |
| CN108662090A (en) * | 2018-07-12 | 2018-10-16 | 合肥工业大学 | A kind of robot joint speed reducer |
| US20180335116A1 (en) * | 2017-05-19 | 2018-11-22 | Toyota Jidosha Kabushiki Kaisha | Geared transmission unit |
| CN208686898U (en) * | 2018-08-10 | 2019-04-02 | 浙江三凯机电有限公司 | A kind of planetary reducer |
| WO2019202159A1 (en) * | 2018-04-20 | 2019-10-24 | Hofer Powertrain Innovation Gmbh | Central web concept in an epicyclic gearbox such as a planetary gearbox and equivalent supporting method |
| CN210423675U (en) * | 2019-06-27 | 2020-04-28 | 南京高速齿轮制造有限公司 | Planet carrier supporting structure of planetary gear box |
| CN111434950A (en) * | 2019-01-14 | 2020-07-21 | 罗灿 | Double-sun-wheel planet row speed reducer capable of reducing abrasion and prime numbers |
-
2020
- 2020-09-26 CN CN202011028435.9A patent/CN112145630A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4468985A (en) * | 1977-11-29 | 1984-09-04 | Skf Nova Ab | Planetary gearing system |
| JPH0814369A (en) * | 1994-06-24 | 1996-01-16 | Nippon Seiko Kk | Rotation supporting device for epicyclic gear |
| JPH09303494A (en) * | 1996-05-21 | 1997-11-25 | Harmonic Drive Syst Ind Co Ltd | Planetary gear device |
| US5692989A (en) * | 1996-06-06 | 1997-12-02 | Kamlukin; Igor | Self aligning planetary gear transmission & speed reducer |
| US20090221397A1 (en) * | 2006-05-22 | 2009-09-03 | Demtroeder Jens | Gear System for a Wind Turbine |
| CN201410878Y (en) * | 2009-06-19 | 2010-02-24 | 一拖(洛阳)开创装备科技有限公司 | Final drive gear of enclosed double-bracing planetary gear used in drive axle |
| JP2012202449A (en) * | 2011-03-24 | 2012-10-22 | Ntn Corp | Planetary gear device |
| WO2012128003A1 (en) * | 2011-03-24 | 2012-09-27 | Ntn株式会社 | Cycloid decelerator and in-wheel motor drive device |
| CN202280797U (en) * | 2011-09-26 | 2012-06-20 | 中国航空工业第六一八研究所 | Planetary reduction gear with high bearing ability |
| CN104520182A (en) * | 2012-10-18 | 2015-04-15 | 三菱重工业株式会社 | Steering gear and ship provided therewith |
| CN203214784U (en) * | 2013-02-28 | 2013-09-25 | 沈观耕 | Planetary gear speed reducer with primary planet carrier and secondary planet carrier meshing mechanism |
| CN203214782U (en) * | 2013-04-11 | 2013-09-25 | 四川理工学院 | Built-in planet deceleration joint |
| CN104500661A (en) * | 2015-01-15 | 2015-04-08 | 重庆大学 | Composite high-order cycloidal planetary transmission device |
| US20180335116A1 (en) * | 2017-05-19 | 2018-11-22 | Toyota Jidosha Kabushiki Kaisha | Geared transmission unit |
| WO2019202159A1 (en) * | 2018-04-20 | 2019-10-24 | Hofer Powertrain Innovation Gmbh | Central web concept in an epicyclic gearbox such as a planetary gearbox and equivalent supporting method |
| CN108662090A (en) * | 2018-07-12 | 2018-10-16 | 合肥工业大学 | A kind of robot joint speed reducer |
| CN208686898U (en) * | 2018-08-10 | 2019-04-02 | 浙江三凯机电有限公司 | A kind of planetary reducer |
| CN111434950A (en) * | 2019-01-14 | 2020-07-21 | 罗灿 | Double-sun-wheel planet row speed reducer capable of reducing abrasion and prime numbers |
| CN210423675U (en) * | 2019-06-27 | 2020-04-28 | 南京高速齿轮制造有限公司 | Planet carrier supporting structure of planetary gear box |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833146A (en) * | 2021-03-08 | 2021-05-25 | 南京好龙电子有限公司 | External meshing planetary gear mechanism with high transmission efficiency |
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Application publication date: 20201229 |
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