CN114294381A - Planetary reducer - Google Patents
Planetary reducer Download PDFInfo
- Publication number
- CN114294381A CN114294381A CN202111585335.0A CN202111585335A CN114294381A CN 114294381 A CN114294381 A CN 114294381A CN 202111585335 A CN202111585335 A CN 202111585335A CN 114294381 A CN114294381 A CN 114294381A
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- Prior art keywords
- gear
- planetary
- planetary gear
- carrier
- sun
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 18
- 238000012856 packing Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 23
- 238000013461 design Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004663 powder metallurgy Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Abstract
The invention discloses a planetary reducer, comprising: the sun gear is connected with the output shaft of the gearbox through a sun gear shaft; the planet gear carrier is coaxial with the sun gear, the sun gear is accommodated in the planet gear carrier, and one end of the sun gear shaft extends out of the planet gear carrier; a planetary gear assembly engaged with the sun gear, the planetary gear assembly being rotationally coupled to the planetary gear carrier; when the gear is high, power is output through an internal spline on the sun gear; and in low gear, power passes through the planetary gear assembly and is output through the internal spline on the planetary gear carrier. The invention has the advantages of good manufacturability, low cost and the like.
Description
Technical Field
The invention belongs to the technical field of automobile transmission parts, and particularly relates to a planetary reducer.
Background
The existing planet gear carrier of the planet speed reducing mechanism adopts a forging or casting process design structure, a forging blank is irregular, the allowance is large, the working procedure is long, the manufacturing cost is high, the defects of sand holes and the like of the casting blank are more, and the rejection rate is high; meanwhile, the planetary reduction mechanism is a power input end of the transfer case, the input rotating speed is high, the load is increased after reduction, and the problem that a planetary gear washer is easy to ablate and the like is solved.
Disclosure of Invention
The invention aims to provide a planetary reducer which is low in cost, long in service life and light in weight design, aiming at the problems of high manufacturing cost, ablation of a planetary gear washer, short service life and the like of a planetary gear carrier of the conventional planetary reduction mechanism.
In order to achieve the above object, a planetary reduction gear according to the present invention includes:
the sun gear is connected with the output shaft of the gearbox through a sun gear shaft;
the planet gear carrier is coaxial with the sun gear, the sun gear is accommodated in the planet gear carrier, and one end of the sun gear shaft extends out of the planet gear carrier;
a planetary gear assembly engaged with the sun gear, the planetary gear assembly being rotationally coupled to the planetary gear carrier;
when the gear is high, power is output through an internal spline on the sun gear; and in low gear, power passes through the planetary gear assembly and is output through the internal spline on the planetary gear carrier.
Preferably, the planet gear carrier comprises an end cover and a planet carrier which are detachably connected together, and two ends of the planet gear assembly are respectively connected with the end cover and the planet carrier. The planet gear carrier is formed by die casting of powder metallurgy materials and is connected by adopting a brazing process.
Further preferably, in low gear, power is output through the internal spline on the end cover after passing through the planetary gear assembly.
Further preferably, splayed oil grooves are formed in the joints of the planetary gear assembly, the end cover and the planet carrier, and the splayed oil grooves communicate the joints with the inner walls of the end cover and the planet carrier.
Further preferably, the sun gear is limited in a space enclosed by the planet carrier and the end cover by a snap spring arranged on the planet carrier.
Further preferably, sun wheel gaskets are arranged at two ends of the sun wheel; the one side interval that sun gear packing ring and sun gear contacted is equipped with a plurality of first oil grooves along the radial arrangement of sun gear packing ring.
Still further preferably, the first oil groove has an arcuate cross section.
Still further preferably, a sun wheel retainer ring is arranged between the clamp spring and one of the sun wheel washers.
Further preferably, the outer wall of the sun wheel gasket is symmetrically provided with first protrusions, and the planet carrier is provided with grooves matched with the first protrusions; the grooves are arranged axially along the carrier.
Still further preferably, the outer wall of the sun wheel retainer ring is symmetrically provided with second protrusions, and the second protrusions are matched with the grooves and are contained in the grooves.
Preferably, the planetary gear assembly comprises a planetary gear shaft connected to a planetary gear carrier; a planetary gear meshed with the sun gear and rotationally connected to the planetary gear shaft; and a roller pin is arranged between the inner wall of the planetary gear and the outer wall of the planetary gear shaft.
Further preferably, the planetary gear and the sun gear are helical gears, the helix angle is 19.3 degrees, and the transmission ratio of the planetary gear train is 2.72.
Still further preferably, the number of the planetary gear teeth is 19, and the number of the sun gear teeth is 53.
Further preferably, at least two rows of needle rollers are arranged along the axial direction of the planet gear shaft, and a needle roller retainer ring is arranged between the adjacent needle rollers.
Preferably, the two ends of the planetary gear are provided with planetary gear washers, and the planetary gear washers are sleeved on the planetary gear shafts.
Still further preferably, both end faces of the planet gear washer are provided with at least one second oil groove arranged along the radial direction of the planet gear washer.
Still further preferably, the second oil groove has an arcuate cross section.
Still further preferably, each end face of the planetary gear washer is provided with two second oil grooves, the central lines of the second oil grooves on the same end face are collinear, and the central lines of the second oil grooves on different end faces are perpendicular.
Preferably, the two ends of the planet gear shaft are provided with V-shaped grooves, and the planet gear shaft is connected with the planet gear carrier through a V-shaped groove riveting structure.
The invention has the beneficial effects that: the planet carrier is composed of an end cover and a planet carrier, and is made of powder metallurgy materials through brazing process connection, so that the manufacturing cost is low. The powder metallurgy material has small density and light weight under the condition of the same volume, and realizes the light weight design of products;
the spiral gear design is adopted, so that the characteristics of high bearing capacity and low noise of the gear are met;
the splayed oil grooves are uniformly distributed on the planet gear carrier, and lubricating oil can fully lubricate the planet gear roller pin assembly through the splayed oil grooves and has good effect;
the sun gear washer and the planet gear washer are made of high polymer materials, and have the advantages of light weight, good abrasion resistance, impact resistance and high strength. The arc-shaped oil groove is a main way for lubricating the planetary gear needle roller assembly by lubricating oil;
the planetary gear needle roller assembly and the planetary gear carrier are connected by adopting a V-shaped groove riveting structure, so that the assembly cost is low;
the planetary gear needle roller assembly is a double-row needle roller group, and has the advantages of long service life and strong bearing capacity.
The planetary gear rolling needle assemblies which are evenly distributed in six equal parts are arranged in a planetary gear frame hole, a sun gear is meshed with the planetary gear, wear-resistant and impact-resistant polymer material gaskets are arranged at the ends of the sun gear and the planetary gear, a planetary reducer mechanism is axially positioned through a clamp spring, and an oil groove is distributed on the planetary gear frame. The invention has the advantages of good manufacturability, low cost and the like.
Drawings
FIG. 1 is a schematic perspective cross-sectional view of the present invention
FIG. 2 is a schematic diagram of a three-dimensional explosive structure according to the present invention
FIG. 3 is a schematic view of the construction of the planetary gear assembly of the present invention
FIG. 4 is a schematic view of the construction of the planetary gear washer of the present invention
FIG. 5 is a schematic view of the structure of the sun gear washer of the present invention
FIG. 6 is a schematic view of the planet carrier structure of the present invention
Detailed Description
The technical solutions of the present invention (including the preferred ones) are further described in detail by way of fig. 1 to 6 and enumerating some alternative embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 1 to 6, the planetary reducer of the present invention includes: the planet gear carrier 3, the planetary gear assembly 4, the sun gear packing ring 5, the sun gear 1, the sun gear retaining ring 6, the jump ring 7. The sun gear 1 is connected with an output shaft of the gearbox through a sun gear shaft 2; in the embodiment, the sun wheel 1 and the sun wheel shaft 2 are of an integrated structure; a planet carrier 3 coaxial with the sun gear 1, the sun gear 1 being accommodated in the planet carrier 3, one end of the sun gear shaft 2 extending out of the planet carrier 3; a planetary gear assembly 4 meshed with the sun gear 1, the planetary gear assembly 4 being rotatably connected to the planetary gear carrier 3; when the gear is high, power is output through an internal spline 1.1 on the sun gear 1; in low gear, power passes through the planetary gear assembly 4 and is output through the internal splines 3.11 on the planet carrier 3.
The planet gear carrier 3 comprises an end cover 3.1 and a planet carrier 3.2 which are detachably connected together, and two ends of the planet gear assembly 4 are respectively connected with the end cover 3.1 and the planet carrier 3.2. The planet gear carrier 3 is formed by die casting of powder metallurgy materials and is connected by a brazing process. In low gear, power passes through the planetary gear assembly 3 and is output through the internal spline 3.11 on the end cover 3.1. Planetary gear assembly 4 is equipped with splayed oil groove 8 with end cover 3.1 and planet carrier 3.2's junction, splayed oil groove 8 communicates above-mentioned junction and end cover 3.1, planet carrier 3.2's inner wall. The sun gear 1 is limited in the space enclosed by the planet carrier 3.2 and the end cover 3.1 through the clamp spring 7 arranged on the planet carrier 3.2. Sun wheel gaskets 5 are arranged at two ends of the sun wheel 1; the surface of the sun wheel gasket 5 contacting the sun wheel 1 is provided with a plurality of first oil grooves 5.1 arranged along the radial direction of the sun wheel gasket 5 at intervals. The cross section of the first oil groove 5.1 is arc-shaped. And a sun wheel retainer ring 6 is arranged between the clamp spring 7 and one of the sun wheel gaskets 5. The outer wall of the sun wheel gasket 5 is symmetrically provided with first bulges 5.2, and the planet carrier 3.2 is provided with a groove matched with the first bulges 5.2; the grooves are arranged axially along the planet carrier 3.2. And second protrusions 6.2 are symmetrically arranged on the outer wall of the sun wheel retainer ring 6, and the second protrusions 6.2 are matched with the grooves and are contained in the grooves.
The planetary gear assembly 4 comprises a planetary gear shaft 4.1 connected with the planetary gear carrier 3; a planetary gear 4.2 which is meshed with the sun gear 1 and is rotationally connected to the planetary gear shaft 4.1; a roller pin 4.3 is arranged between the inner wall of the planet gear 4.2 and the outer wall of the planet gear shaft 4.1. The planetary gear 4.2 and the sun gear 1 are helical gears, the helix angle is 19.3 degrees, the transmission ratio of the planetary gear train is 2.72, in the embodiment, the number of the planetary gear teeth is 19, and the number of the sun gear teeth is 53. At least two rows of needle rollers 4.3 are arranged along the axial direction of the planet gear shaft 4.1, and needle roller retainer rings 4.4 are arranged between the adjacent needle rollers 4.3. In this embodiment, the end of the needle roller 4.3 located at the outermost periphery is also provided with a needle roller retainer 4.4. And two ends of the planetary gear 4.2 are provided with planetary gear washers 4.5, and the planetary gear washers 4.5 are sleeved on the planetary gear shaft 4.1. And both end surfaces of the planet gear gasket 4.5 are provided with at least one second oil groove 4.51 arranged along the radial direction of the planet gear gasket. The cross section of the second oil groove 4.51 is arched. Each terminal surface of planet gear packing ring 4.5 is last respectively to be equipped with two second oil groove 4.51, the central line collineation of second oil groove 4.51 on the same terminal surface, and the second oil groove 4.51 central line on the different terminal surfaces is perpendicular. The end parts of two ends of the planet gear shaft 4.1 are provided with V-shaped grooves 4.11, and the planet gear shaft 4.1 is connected with the planet gear carrier 3 through a V-shaped groove riveting structure.
Preferably, the sun gear washer 5 and the planet gear washer 4.5 are polymer materials, and are polymers of polyimide and polyetheretherketone.
Preferably, the second oil groove 4.5 is an arc-shaped notch 4.52 at one end close to the inner wall of the planet gear gasket 4.5, so that lubricating oil can pass through the notch conveniently.
The power from the gearbox is transmitted to the sun gear, and the sun gear is meshed with the planetary gear assembly to drive the planetary gear to rotate. When the transfer case is in a high-grade state, power is output through an internal spline of the sun gear; when the transfer case is in a low gear, power is output by an internal spline of the planet gear carrier through the planet gear, and the function of the planetary reducer is realized.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.
Claims (10)
1. A planetary reducer, comprising: the sun gear is connected with the output shaft of the gearbox through a sun gear shaft; the planet gear carrier is coaxial with the sun gear, the sun gear is accommodated in the planet gear carrier, and one end of the sun gear shaft extends out of the planet gear carrier; a planetary gear assembly engaged with the sun gear, the planetary gear assembly being rotationally coupled to the planetary gear carrier; when the gear is high, power is output through an internal spline on the sun gear; and in low gear, power passes through the planetary gear assembly and is output through the internal spline on the planetary gear carrier.
2. The planetary reducer according to claim 1, wherein: the planetary gear carrier comprises an end cover and a planetary carrier which are detachably connected together, and two ends of the planetary gear assembly are respectively connected with the end cover and the planetary carrier; and in low gear, power is output through the internal spline on the end cover after passing through the planetary gear assembly.
3. The planetary reducer according to claim 2, wherein: the junction of planetary gear assembly and end cover and planet carrier is equipped with the splayed oil groove, the splayed oil groove is with the inner wall intercommunication of above-mentioned junction and end cover, planet carrier.
4. The planetary reducer according to claim 2, wherein: the sun gear is limited in the space enclosed by the planet carrier and the end cover through a clamp spring arranged on the planet carrier.
5. The planetary reducer according to claim 2, wherein: sun wheel gaskets are arranged at two ends of the sun wheel; a plurality of first oil grooves which are radially arranged along the sun wheel gasket are arranged on one surface of the sun wheel gasket, which is in contact with the sun wheel, at intervals; the cross section of the first oil groove is arched; and a sun wheel retainer ring is arranged between the clamp spring and one of the sun wheel gaskets.
6. The planetary reducer of claim 5, wherein: the outer wall of the sun wheel gasket is symmetrically provided with first bulges, and the planet carrier is provided with a groove matched with the first bulges; the grooves are arranged along the axial direction of the planet carrier; and second bulges are symmetrically arranged on the outer wall of the sun wheel retainer ring, are matched with the grooves and are contained in the grooves.
7. The planetary reducer according to claim 1, wherein: the planetary gear assembly comprises a planetary gear shaft connected with a planetary gear carrier; a planetary gear meshed with the sun gear and rotationally connected to the planetary gear shaft; and a roller pin is arranged between the inner wall of the planetary gear and the outer wall of the planetary gear shaft.
8. The planetary reducer according to claim 7, wherein: the planetary gear and the sun gear are helical gears, the helical angle is 19.3 degrees, and the transmission ratio of the planetary gear train is 2.72 degrees.
9. The planetary reducer according to claim 7, wherein: the two ends of the planetary gear are provided with planetary gear gaskets which are sleeved on the planetary gear shafts; both end faces of the planet gear gasket are provided with at least one second oil groove arranged along the radial direction of the planet gear gasket; the cross section of the second oil groove is arched.
10. The planetary reducer of claim 9, wherein: each terminal surface of planetary gear packing ring is last respectively to be equipped with two the second oil groove, the central line collineation of second oil groove on the same terminal surface, and the second oil groove central line on the different terminal surfaces is perpendicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111585335.0A CN114294381A (en) | 2021-12-17 | 2021-12-17 | Planetary reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111585335.0A CN114294381A (en) | 2021-12-17 | 2021-12-17 | Planetary reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114294381A true CN114294381A (en) | 2022-04-08 |
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ID=80970040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111585335.0A Pending CN114294381A (en) | 2021-12-17 | 2021-12-17 | Planetary reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114294381A (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201841952U (en) * | 2010-03-15 | 2011-05-25 | 杭州前进齿轮箱集团股份有限公司 | Automobile transfer case with double cone synchronizer |
| CN201992009U (en) * | 2011-03-31 | 2011-09-28 | 江苏技术师范学院 | Continuous variable transmission of motor regulation for cars |
| CN102808936A (en) * | 2012-08-31 | 2012-12-05 | 东风汽车公司 | Gear-selecting and shifting actuating mechanism for automatic mechanical transmission case |
| CN202992122U (en) * | 2012-12-19 | 2013-06-12 | 上汽依维柯红岩商用车有限公司 | Heavy-duty car axle hub reductor structure |
| CN107588182A (en) * | 2017-11-03 | 2018-01-16 | 湖北星睿传动机械有限公司 | A kind of Double-counter shaft gear box spindle and sun gear attachment structure |
| CN108131424A (en) * | 2017-12-25 | 2018-06-08 | 杭州前进齿轮箱集团股份有限公司 | A kind of Direct wheel drives retarder |
| CN207621270U (en) * | 2017-12-22 | 2018-07-17 | 重庆国轴机械制造有限公司 | Planetary reduction gear and electric vehicle |
| CN208268319U (en) * | 2017-12-25 | 2018-12-21 | 杭州前进齿轮箱集团股份有限公司 | Direct wheel drives retarder |
| CN109356982A (en) * | 2018-10-16 | 2019-02-19 | 东风汽车集团有限公司 | Planetary reduction gear gearshift and automobile |
| CN209398815U (en) * | 2018-12-28 | 2019-09-17 | 东风商用车有限公司 | A kind of hybrid power gearbox |
| CN209398802U (en) * | 2018-11-13 | 2019-09-17 | 江苏欧瑞格传动部件有限公司 | New energy two-shift automatic variable speed case planet row |
| CN110422044A (en) * | 2019-08-16 | 2019-11-08 | 舍弗勒技术股份两合公司 | Automobile and hybrid power system |
| CN110936811A (en) * | 2018-09-25 | 2020-03-31 | 长城汽车股份有限公司 | Electric drive axle and gear shifting method thereof |
| CN210686938U (en) * | 2019-08-22 | 2020-06-05 | 杭州开兰重工机械有限公司 | Planet carrier device of cutting arm speed reducer |
| CN212643538U (en) * | 2020-05-18 | 2021-03-02 | 常州市华立液压润滑设备有限公司 | Sealing structure of oil pump and oil pump with same |
| CN113417977A (en) * | 2021-05-31 | 2021-09-21 | 东风商用车有限公司 | Gearbox structure of reversing gear |
-
2021
- 2021-12-17 CN CN202111585335.0A patent/CN114294381A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201841952U (en) * | 2010-03-15 | 2011-05-25 | 杭州前进齿轮箱集团股份有限公司 | Automobile transfer case with double cone synchronizer |
| CN201992009U (en) * | 2011-03-31 | 2011-09-28 | 江苏技术师范学院 | Continuous variable transmission of motor regulation for cars |
| CN102808936A (en) * | 2012-08-31 | 2012-12-05 | 东风汽车公司 | Gear-selecting and shifting actuating mechanism for automatic mechanical transmission case |
| CN202992122U (en) * | 2012-12-19 | 2013-06-12 | 上汽依维柯红岩商用车有限公司 | Heavy-duty car axle hub reductor structure |
| CN107588182A (en) * | 2017-11-03 | 2018-01-16 | 湖北星睿传动机械有限公司 | A kind of Double-counter shaft gear box spindle and sun gear attachment structure |
| CN207621270U (en) * | 2017-12-22 | 2018-07-17 | 重庆国轴机械制造有限公司 | Planetary reduction gear and electric vehicle |
| CN108131424A (en) * | 2017-12-25 | 2018-06-08 | 杭州前进齿轮箱集团股份有限公司 | A kind of Direct wheel drives retarder |
| CN208268319U (en) * | 2017-12-25 | 2018-12-21 | 杭州前进齿轮箱集团股份有限公司 | Direct wheel drives retarder |
| CN110936811A (en) * | 2018-09-25 | 2020-03-31 | 长城汽车股份有限公司 | Electric drive axle and gear shifting method thereof |
| CN109356982A (en) * | 2018-10-16 | 2019-02-19 | 东风汽车集团有限公司 | Planetary reduction gear gearshift and automobile |
| CN209398802U (en) * | 2018-11-13 | 2019-09-17 | 江苏欧瑞格传动部件有限公司 | New energy two-shift automatic variable speed case planet row |
| CN209398815U (en) * | 2018-12-28 | 2019-09-17 | 东风商用车有限公司 | A kind of hybrid power gearbox |
| CN110422044A (en) * | 2019-08-16 | 2019-11-08 | 舍弗勒技术股份两合公司 | Automobile and hybrid power system |
| CN210686938U (en) * | 2019-08-22 | 2020-06-05 | 杭州开兰重工机械有限公司 | Planet carrier device of cutting arm speed reducer |
| CN212643538U (en) * | 2020-05-18 | 2021-03-02 | 常州市华立液压润滑设备有限公司 | Sealing structure of oil pump and oil pump with same |
| CN113417977A (en) * | 2021-05-31 | 2021-09-21 | 东风商用车有限公司 | Gearbox structure of reversing gear |
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