CN113251112A - Planetary transmission system and arrangement method thereof - Google Patents
Planetary transmission system and arrangement method thereof Download PDFInfo
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- CN113251112A CN113251112A CN202110621391.9A CN202110621391A CN113251112A CN 113251112 A CN113251112 A CN 113251112A CN 202110621391 A CN202110621391 A CN 202110621391A CN 113251112 A CN113251112 A CN 113251112A
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- planetary
- planet
- planet wheels
- wheels
- frame
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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
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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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
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Friction Gearing (AREA)
Abstract
A planetary transmission system comprising: a planetary frame; a sun gear mounted to the planetary frame; a ring gear; the planet wheel unit consists of N groups of planet wheels, the N groups of planet wheels are arranged on the planet frame and are meshed between the sun wheel and the gear ring, and N is more than or equal to 3; the planet frame is provided with N support columns along the periphery, a group of planet wheels are arranged between every two adjacent support columns, each group of planet wheels consists of N closely adjacent planet wheels, and N is larger than or equal to 2. The planetary transmission system can adapt to the requirement of large torque, solves the problem of contradiction between the transmission ratio and the layout space, and improves the strength of a planetary frame.
Description
Technical Field
The invention belongs to the technical field of planetary transmission, and relates to a planetary transmission system and an arrangement method thereof.
Background
In a conventional planetary transmission system, as shown in fig. 3, planet wheels are arranged between support columns 3 of a planetary frame at intervals in a one-to-one correspondence manner, when the strength of the planet wheels needs to be increased, the number of the planet wheels needs to be increased generally, but in practice, when the number of the planet wheels is greater than or equal to 6, due to the contradiction between the transmission ratio and the layout space, the distance between the planet wheels is extremely easy to be too small, the design strength of the planetary frame, particularly the support columns, is affected, and therefore the required design scheme cannot be achieved. For example, as shown in fig. 2, when 6 planetary wheels are arranged, the angle between adjacent planetary wheels is substantially θ, which results in a narrow space between adjacent planetary wheels, difficulty in providing a support column, and difficulty in satisfying the overall requirements of the planetary frame in strength even if the support column is provided.
Therefore, there is a need to develop a planetary transmission system and a method for arranging the same to solve one or more of the above technical problems.
Disclosure of Invention
To solve at least one of the above-described technical problems, according to an aspect of the present invention, there is provided a planetary transmission system characterized by comprising:
a planetary frame;
a sun gear mounted to the planetary frame;
a ring gear; and
the planet wheel unit consists of N groups of planet wheels, the N groups of planet wheels are arranged on the planet frame and are meshed between the sun wheel and the gear ring, and N is more than or equal to 3;
the planetary frame is provided with N support columns along the periphery, a set of planet wheels is arranged between every two adjacent support columns, each set of planet wheels consists of N closely adjacent planet wheels, N is larger than or equal to 2, and the planetary frame is of an integrally formed structure.
According to the other aspect of the invention, each group of planet wheels consists of first to nth planet wheels which are sequentially arranged in a counterclockwise direction, and the first planet wheels are arranged at equal intervals.
According to the other aspect of the invention, each group of planet wheels consists of first to nth planet wheels which are sequentially arranged in a counterclockwise direction, the first planet wheels are arranged at unequal intervals, and the difference of corresponding angles between every two adjacent first planet wheels is smaller than or equal to a first preset angle.
According to yet another aspect of the present invention, the planet carrier is formed by a top disk, a bottom disk, and the support posts connected between the top disk and the bottom disk.
According to still another aspect of the present invention, the first predetermined angle is 10 degrees or less.
According to yet another aspect of the invention, the first predetermined angle is between 1-8 degrees.
According to yet another aspect of the invention, the first predetermined angle is between 2-5 degrees.
According to a further aspect of the invention, N is equal to 3, and the respective angles between each adjacent first planet wheel are 120.98 degrees, 120.99 degrees and 118.03 degrees, respectively.
According to yet another aspect of the invention, where n is 2, the corresponding angle between the first and second planets is 47.22 degrees.
According to a further aspect of the invention, the respective angles between a portion of adjacent first planet wheels are equal.
The invention can obtain one or more of the following technical effects:
1. the number of the planet wheels is increased, the strength of the planet wheels is improved, and the contradiction between the transmission ratio and the layout space is solved;
2. the strength of a single support column is increased, the integral strength requirement of the planet frame is met, and the lightweight of the planet frame is realized;
3. the planet wheels in each group of planet wheels are close to each other, so that space is saved and reserved for the arrangement of the supporting columns;
4. the space between each group of planet wheels is increased, so that conditions are provided for increasing the strength of the support column;
5. the groups of planet wheels are arranged unevenly, so that the given speed ratio requirement and the requirement of arrangement space are met.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic cross-sectional view of a planetary transmission system according to a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of a conventional planetary transmission system.
Fig. 3 is a diagram illustrating an example of a conventional planetary frame.
Detailed Description
The best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings, wherein the detailed description is for the purpose of illustrating the invention in detail, and is not to be construed as limiting the invention, as various changes and modifications can be made therein without departing from the spirit and scope thereof, which are intended to be encompassed within the appended claims.
Referring to fig. 1, there is provided a planetary transmission system according to a preferred embodiment of the present invention, characterized by comprising:
a planetary frame;
a sun gear 4 attached to the planetary frame;
a ring gear 1; and
the planet wheel unit consists of N groups of planet wheels, the N groups of planet wheels are arranged on the planet frame and are meshed between the sun wheel 4 and the gear ring 1, and N is more than or equal to 3;
the planetary frame is provided with N support columns 3 along the periphery, a group of planet wheels are arranged between every two adjacent support columns 3, each group of planet wheels consists of N closely adjacent planet wheels, and N is larger than or equal to 2.
Preferably, the planet frame is of an integrally formed structure.
Preferably, referring to fig. 1, the N groups of planet wheels are embodied as a first group of planet wheels 21, a second group of planet wheels 22 and a third group of planet wheels 23. The first set of planet wheels 21 comprises, for example, a first planet wheel 211 and a second planet wheel 212 arranged in sequence in a counter-clockwise direction. The second set of planet wheels 22 comprises, for example, a first planet wheel 221 and a second planet wheel 222 arranged in sequence in a counter-clockwise direction. The third set of planet wheels 23 comprises, for example, a first planet wheel 231 and a second planet wheel 232 arranged in sequence in a counter-clockwise direction.
According to another preferred embodiment of the invention, each group of planet wheels consists of first to nth planet wheels which are arranged in sequence in the anticlockwise direction, and the first planet wheels 211, 221 and 231 are arranged at equal intervals.
According to another preferred embodiment of the present invention, each set of planetary gears is composed of first to nth planetary gears arranged in sequence in a counterclockwise direction, the first planetary gears 211, 221, 231 are arranged at unequal intervals, and the difference between the corresponding angles of the adjacent first planetary gears is smaller than or equal to a first predetermined angle. For example, α 1, α 2, α 3 shown in fig. 1 are not equally divided, wherein, for example, two are not equal, or one is not equal to the other two. Advantageously, the groups of planet wheels are arranged unevenly, which is beneficial to meeting the requirements of the preset speed ratio and the requirement of the arrangement space.
According to a further preferred embodiment of the invention, see fig. 3, the planet carrier is made up of a top disc, a bottom disc and the support columns 3 connected between the top and bottom discs.
According to still another preferred embodiment of the present invention, the first predetermined angle is 10 degrees or less.
According to a further preferred embodiment of the present invention, said first predetermined angle is between 1 and 8 degrees.
According to a further preferred embodiment of the present invention, said first predetermined angle is between 2 and 5 degrees.
According to a further preferred embodiment of the invention N is equal to 3 and the respective angles between each adjacent first planet wheel are 120.98 degrees, 120.99 degrees and 118.03 degrees, respectively, in this order.
According to a further preferred embodiment of the invention, n is 2 and the corresponding angle between the first and second planet wheels is 47.22 degrees.
According to a further preferred embodiment of the invention, the respective angles between a part of adjacent first planet wheels are equal. For example α 1 ═ α 2, α 2 is not equal to α 3.
Preferably, taking a practical and practical certain planetary transmission parameter as an example: a sun gear: 40. the number of the planet wheels 21, the ring gear 82 and the planet wheels is 6. Firstly, the number of the planet wheels can be half of the actual number of the planet wheels, namely 3, and the angles between the 3 adjacent planet wheels are determined according to the meshing condition and the assembly condition: 118.03, 120.98, 120.99; secondly, according to the use demand, the 3 planet wheels rotate around the sun wheel by a certain angle (here, 47.22 degrees are obtained according to the size of the planet wheels and the size of the arrangement space), the position of the rest 3 planet wheels is used for arranging, the planet wheel layout scheme (figure 1) is realized, and the corresponding strength of the planet frame meets the demand.
According to a further preferred embodiment of the present invention, referring to fig. 1, the support column 3 has a first surface, a second surface and a third surface. The first surface and the second surface are planes, and a third plane connected between the first surface and the second surface is an arc-shaped plane.
Preferably, two surfaces adjacent to each other of the adjacent two support columns 3 (for example, the first surface of one support column and the second surface of the other support column) are co-circular with a predetermined radius at the center of a point of a predetermined position. That is, the first surface and the second surface are arcuate surfaces. Accordingly, the support post includes a first surface, a second surface, a third surface, and a fourth surface opposite the third surface. The first surface, the second surface and the third surface are arc-shaped surfaces, and the fourth surface is a plane or an arc-shaped surface. Advantageously, when the plane design is performed, the first surface and the second surface of the adjacent supporting column can be efficiently machined through the first surface and the second surface which are designed by the arc-shaped surfaces, through the rotating cutting tool arranged in the circle center, the strength of the supporting column is improved through the design of the first arc-shaped surface and the second arc-shaped surface of the supporting column, the subsequent cutting machining is facilitated, and the machining efficiency is improved.
The invention can obtain one or more of the following technical effects:
1. the number of the planet wheels is increased, the strength of the planet wheels is improved, and the contradiction between the transmission ratio and the layout space is solved;
2. the strength of a single support column is increased, the integral strength requirement of the planet frame is met, and the lightweight of the planet frame is realized;
3. the planet wheels in each group of planet wheels are close to each other, so that space is saved and reserved for the arrangement of the supporting columns;
4. the space between each group of planet wheels is increased, so that conditions are provided for increasing the strength of the support column;
5. the groups of planet wheels are arranged unevenly, so that the given speed ratio requirement and the requirement of arrangement space are met.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A planetary transmission system, comprising:
a planetary frame;
a sun gear mounted to the planetary frame;
a ring gear; and
the planet wheel unit consists of N groups of planet wheels, the N groups of planet wheels are arranged on the planet frame and are meshed between the sun wheel and the gear ring, and N is more than or equal to 3;
the planetary frame is provided with N support columns along the periphery, a set of planet wheels is arranged between every two adjacent support columns, each set of planet wheels consists of N closely adjacent planet wheels, N is larger than or equal to 2, and the planetary frame is of an integrally formed structure.
2. The planetary drive system of claim 1, wherein each set of planets comprises first through nth planets arranged in sequence in a counterclockwise direction, and the first planets are equally spaced.
3. The planetary transmission system according to claim 1, wherein each set of planetary wheels is composed of first to nth planetary wheels arranged in sequence in the counterclockwise direction, the first planetary wheels are arranged at unequal intervals, and the difference between the corresponding angles of the adjacent first planetary wheels is smaller than or equal to a first predetermined angle.
4. A planetary transmission according to any of claims 1 to 3, characterised in that the planetary frame is made up of a top disc, a bottom disc and the support struts connected between the top and bottom discs.
5. The planetary transmission system as in claim 3, wherein the first predetermined angle is 10 degrees or less.
6. The planetary transmission according to claim 3, wherein the first predetermined angle is between 1-8 degrees.
7. The planetary transmission according to claim 3, wherein the first predetermined angle is between 2-5 degrees.
8. The planetary transmission according to claim 3, wherein N is equal to 3, and the respective angles between each adjacent first planet gear are 120.98 degrees, 120.99 degrees, and 118.03 degrees, respectively.
9. The planetary transmission according to claim 8, wherein n-2, the corresponding angle between the first and second planets is 47.22 degrees.
10. The planetary drive system of claim 4, wherein a portion of adjacent first planets are at equal respective angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621391.9A CN113251112A (en) | 2021-06-03 | 2021-06-03 | Planetary transmission system and arrangement method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621391.9A CN113251112A (en) | 2021-06-03 | 2021-06-03 | Planetary transmission system and arrangement method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113251112A true CN113251112A (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110621391.9A Pending CN113251112A (en) | 2021-06-03 | 2021-06-03 | Planetary transmission system and arrangement method thereof |
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| CN (1) | CN113251112A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533125A (en) * | 1939-10-11 | 1941-02-06 | William Henry Nathan Loveday | Improvements in hydraulic epicyclic transmission devices |
| GB826892A (en) * | 1957-01-25 | 1960-01-27 | Fichtel & Sachs Ag | Improvements in or relating to change-speed gear hubs for cycles and motor cycles |
| US4539856A (en) * | 1983-09-23 | 1985-09-10 | Doug Nash Equipment & Engineering | Two-speed auxiliary transmission |
| CN202040314U (en) * | 2010-12-17 | 2011-11-16 | 江苏省金象减速机有限公司 | Three-fulcrum six planetary gear uniform load balancing mechanism |
| CN203293479U (en) * | 2013-02-01 | 2013-11-20 | 深圳市兆威机电有限公司 | Integrated planet carrier die |
| CN203374770U (en) * | 2013-08-09 | 2014-01-01 | 刘洋 | Integrated planet carrier |
| CN103963233A (en) * | 2013-02-01 | 2014-08-06 | 深圳市兆威机电有限公司 | Integrated planet carrier mold, processing method and planet carrier |
| CN206309922U (en) * | 2016-08-30 | 2017-07-07 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of planet carrier and the epicyclic gearbox including it |
| EP3379107A1 (en) * | 2017-03-23 | 2018-09-26 | Cordrive Ab | Compound planet gear arrangement and gear wheel arrangement |
| CN111173897A (en) * | 2020-01-14 | 2020-05-19 | 福建万润新能源科技有限公司 | Planet wheel system with planet wheels arranged in groups, configuration method and vehicle |
| CN215059234U (en) * | 2021-06-03 | 2021-12-07 | 北方汤臣传动科技有限公司 | Planetary transmission structure |
-
2021
- 2021-06-03 CN CN202110621391.9A patent/CN113251112A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533125A (en) * | 1939-10-11 | 1941-02-06 | William Henry Nathan Loveday | Improvements in hydraulic epicyclic transmission devices |
| GB826892A (en) * | 1957-01-25 | 1960-01-27 | Fichtel & Sachs Ag | Improvements in or relating to change-speed gear hubs for cycles and motor cycles |
| US4539856A (en) * | 1983-09-23 | 1985-09-10 | Doug Nash Equipment & Engineering | Two-speed auxiliary transmission |
| CN202040314U (en) * | 2010-12-17 | 2011-11-16 | 江苏省金象减速机有限公司 | Three-fulcrum six planetary gear uniform load balancing mechanism |
| CN203293479U (en) * | 2013-02-01 | 2013-11-20 | 深圳市兆威机电有限公司 | Integrated planet carrier die |
| CN103963233A (en) * | 2013-02-01 | 2014-08-06 | 深圳市兆威机电有限公司 | Integrated planet carrier mold, processing method and planet carrier |
| CN203374770U (en) * | 2013-08-09 | 2014-01-01 | 刘洋 | Integrated planet carrier |
| CN206309922U (en) * | 2016-08-30 | 2017-07-07 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of planet carrier and the epicyclic gearbox including it |
| EP3379107A1 (en) * | 2017-03-23 | 2018-09-26 | Cordrive Ab | Compound planet gear arrangement and gear wheel arrangement |
| CN111173897A (en) * | 2020-01-14 | 2020-05-19 | 福建万润新能源科技有限公司 | Planet wheel system with planet wheels arranged in groups, configuration method and vehicle |
| CN215059234U (en) * | 2021-06-03 | 2021-12-07 | 北方汤臣传动科技有限公司 | Planetary transmission structure |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20210813 |