CN218718526U - Planetary gear gearbox - Google Patents
Planetary gear gearbox Download PDFInfo
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- CN218718526U CN218718526U CN202222024302.5U CN202222024302U CN218718526U CN 218718526 U CN218718526 U CN 218718526U CN 202222024302 U CN202222024302 U CN 202222024302U CN 218718526 U CN218718526 U CN 218718526U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The application discloses planetary transmission, it includes: the disc-shaped first shell is characterized in that one side of the first shell is provided with an annular bulge extending outwards along the axial direction of the first shell, a first transmission shaft partially penetrates through the first shell and protrudes out of the annular bulge, a sun gear is arranged on the side, protruding out of the annular bulge, of the first transmission shaft, a first inner gear ring is embedded into the annular bulge, the inner side of the first inner gear ring is provided with first teeth, a gear support is provided with a base, one side of the base is provided with at least 2 bolts, the bolts are respectively provided with a first gear and a second gear, the sun gear is respectively meshed with the second gear, the first gear is meshed with the first inner gear ring, the inner side of the second inner gear ring is provided with second teeth, the second inner gear ring is arranged on the gear support and meshed with the second teeth, and a second transmission shaft is arranged on the side, far away from the second teeth, of the second inner gear ring. Therefore, the large transmission ratio can be realized by only using single-stage planetary gear transmission to adjust the transmission ratio.
Description
Technical Field
The application relates to the field of gearbox transmission, in particular to a planetary gearbox.
Background
Generally, a transmission for realizing speed change by using a planetary gear mechanism increases transmission ratio and torque through multi-stage planetary gear mechanism transmission, a multi-stage planetary gear transmission box has a complex structure and an overlarge axial size, and certain difficulty exists in design and installation for equipment with volume requirements on space occupied by a transmission structure.
Therefore, a planetary gear transmission box which is small in size, simple in structure and capable of achieving large transmission ratio without multi-stage planetary gear transmission needs to be designed.
SUMMERY OF THE UTILITY MODEL
To overcome the above disadvantages, the present application aims to: a planetary transmission is provided which can achieve a wide gear ratio through single-stage planetary gear transmission, thereby improving the versatility of the transmission mechanism.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a planetary transmission, comprising:
the device comprises a shell, a first shell and a second shell, wherein the shell comprises a disc-shaped first shell and a second shell connected with the first shell, and one side of the first shell is provided with an annular bulge extending outwards along the axial direction of the first shell;
a first transmission shaft partially passing through the first housing and protruding from the annular protrusion,
a sun gear disposed on the first transmission shaft on the side protruding from the annular projection,
a first inner gear ring embedded in the annular bulge, the inner side of the first inner gear ring is provided with first teeth,
a gear bracket having a base, at least 2 pins disposed on one side of the base, a first gear and a second gear disposed on the pins, respectively, and a sun gear engaged with the second gear, respectively, the first gear engaged with the first gear, the first gear connected with the second gear,
a second inner gear ring, the inner side of which is provided with second teeth, the second inner gear ring is arranged on the gear bracket, and the second gear is meshed with the second teeth,
and the second transmission shaft is arranged on the side, far away from the second tooth, of the second inner gear ring, passes through the through hole of the second shell and protrudes out of the second shell.
Alternatively, as an embodiment of the planetary transmission,
the first gear and the second gear are a group of duplicate gears.
Alternatively, as an embodiment of the planetary transmission,
the bottom of the second shell is provided with a second receiving part,
the second bearing is arranged in the second accommodating part and sleeved on the second transmission shaft.
Alternatively, as an embodiment of the planetary transmission,
the first housing has a first receiving portion, the first bearing is disposed in the first receiving portion, and the first bearing is sleeved on the first transmission shaft.
Alternatively, as an embodiment of the planetary transmission,
one side of base disposes 3 bolts, and the projection of the central line of sun gear on the base is located the center of 3 bolt central lines, disposes first gear and second gear on 3 bolts respectively, and the sun gear meshes with 3 second gears respectively.
Alternatively, as an embodiment of the planetary transmission,
the first gear and the second gear have different gear pitch circle diameters. The number of teeth of the first gear and the second gear may be the same or different. The first gear has a different module than the second gear.
Alternatively, as an embodiment of the planetary transmission,
the gear reference circle diameter of the second teeth of the second inner gear ring is larger than that of the first teeth of the first inner gear ring, and the first transmission shaft and the second transmission shaft rotate in opposite directions.
Alternatively, as an embodiment of the planetary transmission,
the gear reference circle diameter of the second teeth of the second inner gear ring is smaller than that of the first teeth of the first inner gear ring, and the first transmission shaft and the second transmission shaft rotate in the same direction.
Alternatively, as an embodiment of the planetary transmission,
a groove is formed in the first shell, a protrusion matched with the groove is formed in the outer side of the first inner gear ring, and the first inner gear ring is fixed to the first shell through the protrusion.
Alternatively, as an embodiment of the planetary transmission,
the second shell is cylindrical and is sleeved on the annular bulge.
Advantageous effects
The planetary gear gearbox provided by the application can realize theoretically infinite transmission ratio only by single-stage planetary gear transmission through the structure of the duplicate gear and the double gear rings, is simple in structure and small in size, saves the space of equipment, can adapt to and adjust different transmission ratios by replacing the duplicate gear and the gear rings with different sizes, and improves the universality of a gearbox mechanism.
Drawings
The accompanying drawings are included to provide an understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure. The shapes and sizes of the various elements in the drawings are not to be considered as true proportions, but rather are merely intended to illustrate the context of the application.
FIG. 1 is a schematic half-section view of a planetary transmission in accordance with an embodiment of the present application;
FIG. 2 is an exploded view of a planetary transmission according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a second ring gear of the planetary transmission in accordance with an embodiment of the present application;
FIG. 4 is a schematic diagram of a planetary gear of a planetary transmission according to an embodiment of the present application;
FIG. 5 is a schematic representation of the first ring gear of the present application implementing a planetary transmission;
FIG. 6 is a schematic structural diagram of a first housing of a planetary transmission in accordance with an embodiment of the present application;
FIG. 7 is a schematic illustration of a gear carrier of a transmission embodying the present application;
fig. 8 is a schematic structural diagram of a second housing according to an embodiment of the present application.
Reference numerals: 10-a second housing; a second housing part-11; 20-a second ring gear; 21-a second bearing; 22-a bearing shaft; 23-a second drive shaft; 30-a gear holder; 31-a base; 32-a latch; 33-a third bearing; 40-a planetary gear; 41-the side with less number of planetary gears; 42-side with more teeth; 50-sun gear; 60-a first annulus gear; 61-first annulus gear protrusion; 70-a first housing; 71-a first housing recess; 72-a first receiving portion; annular projection-73; 80-a first drive shaft; 81-first bearing.
Detailed Description
The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions employed in the examples may be further adjusted as determined by the particular manufacturer, and the conditions not specified are typically those used in routine experimentation.
The present application discloses a planetary transmission. The planetary transmission includes: the disc-shaped first shell is characterized in that one side of the first shell is provided with an annular bulge extending outwards along the axial direction of the first shell, a first transmission shaft partially penetrates through the first shell and protrudes out of the annular bulge, a sun gear is arranged on the side, protruding out of the annular bulge, of the first transmission shaft, a first inner gear ring is embedded into the annular bulge, the inner side of the first inner gear ring is provided with first teeth, a gear support is provided with a base, one side of the base is provided with at least 2 bolts, the bolts are respectively provided with a first gear and a second gear, the sun gear is respectively meshed with the second gear, the first gear is meshed with the first inner gear ring, the inner side of the second inner gear ring is provided with second teeth, the second inner gear ring is arranged on the gear support and meshed with the second teeth, and a second transmission shaft is arranged on the side, far away from the second teeth, of the second inner gear ring. Therefore, a large transmission ratio can be realized only by using single-stage planetary gear transmission, duplicate gears with different sizes and corresponding gear rings are replaced to adjust the transmission ratio, and the universality of the gearbox is improved. The first gear and the second gear are connected and combined to form a duplex planetary gear. The planetary gearbox can be used in tools, such as working heads of portable tools, wherein the first transmission shaft is connected with the driving end of the motor, and the second transmission shaft is used as output to reduce speed. A second drive shaft may also be connected to the drive end of the motor, with the first drive shaft serving as the output to increase speed (depending on the application). The planetary gearbox can also be used in a grinding tool for grinding edges. The first/second annulus gears, sometimes collectively referred to as the ring gear, have teeth on their inner/inner walls for engagement with the planet gears.
The planetary transmission proposed by the present application will be described next with reference to fig. 1-8.
The planetary transmission includes:
a housing including a disc-shaped first housing 70 and a second housing 10 connected thereto, wherein an annular protrusion 73 extending outward in an axial direction of the first housing 70 is disposed on one side of the first housing 70;
a first transmission shaft 80 partially passing through the first housing 70 and protruding from the annular projection 73,
a sun gear 50 disposed on the first transmission shaft 80 on the side of the annular projection 73,
a first ring gear 60 embedded in the annular protrusion 73, the first ring gear 60 having first teeth on an inner side thereof,
the gear bracket 30 includes a base 31, at least 2 pins 32 are disposed on one side of the base 31, a first gear and a second gear (the first gear and the second gear form a duplex planetary gear in combination, and the second gear is close to the base 31 side) are disposed on the pins 32, respectively, a sun gear 50 is engaged with the second gear, and the first gear is engaged with a first tooth inside a first ring gear 60.
The second ring gear 20 is provided with second teeth on the inner side, the second ring gear 20 is sleeved on the gear support 30 (the base 31 is located inside the second ring gear 20), and the second teeth of the second ring gear 20 are engaged with the second teeth of the second ring gear 20,
and a second transmission shaft 23 disposed on a side of the second ring gear 20 away from the second tooth, the second transmission shaft 23 passing through the through hole of the second housing 10 and protruding from the second housing 10. In the embodiment, the bottom of the second housing 10 has a second receiving portion 11, the second bearing 21 is disposed in the second receiving portion 11, and the second bearing 21 is sleeved on the second transmission shaft 23. The second transmission shaft 23 and the second ring gear 20 may be designed integrally or separately. In the present embodiment, the number of teeth of the first gear is different from that of the second gear, and when the number of teeth of the second ring gear 20 is greater than that of the first teeth of the first ring gear 60, the first transmission shaft 80 and the second transmission shaft 23 rotate in opposite directions; when the number of second teeth of the second ring gear 20 is less than the number of first teeth of the first ring gear 60, the first transmission shaft 80 rotates in the same direction as the second transmission shaft 23. In this embodiment, the second housing 10 is cylindrical and is sleeved on the annular protrusion 73.
Referring to fig. 5 and 6, the first housing 70 is provided with a groove 71, the outside of the first ring gear 60 is provided with a protrusion 61 matching the groove 71, and the first ring gear 60 is fixed to the first housing 70 by the protrusion 61.
In an embodiment, 3 pins 32 are disposed on one side of the base 31, a projection of a central line of the sun gear 50 on the base 31 is located at a center of the central line of the 3 pins 32, the 3 pins 32 are respectively disposed with a first gear and a second gear, the sun gear 50 is respectively engaged with the 3 second gears, wherein the first gear is connected with the second gear, and in this embodiment, the first gear and the second gear are a set of dual gears. The first housing 70 has a first receiving portion 72, the first bearing 81 is disposed in the first receiving portion 72, and the first bearing 81 is sleeved on the first transmission shaft 80.
The working mechanism of the planetary gear transmission is as follows:
the first housing 70 is fixed, that is, the first ring gear 60 is fixed, the first transmission shaft 80 inputs power, the sun gear 50 transmits power to the planetary gears 40, the planetary gears 40 rotate under the support of the gear bracket 30, the planetary gears 40 transmit power to the second ring gear 20 due to the reaction force of the first ring gear 60, and the second ring gear 20 outputs power by means of the second transmission shaft 23, obtaining a large torque.
On the other hand, power can be input from the second transmission shaft 23, and the first transmission shaft 80 outputs power through the reverse process, so that a larger speed-up ratio is obtained. The speed reduction device mainly aims to achieve the purpose of speed reduction by using the difference between the numbers of the two gear rings and the corresponding gear of the planet gear, and the closer the two gear numbers are, the larger the speed reduction ratio is.
In addition, the transmission ratio can be changed by replacing the duplicate gears and the gear rings with different dimensions, the closer the common normal line of the duplicate gears is, the higher the speed ratio is, the different sizes of the duplicate gears are, and the different sizes of the two gear rings are, for example, the big gear ring is 1 module, the 100 teeth, the small teeth are 99 teeth, only the small gear ring is changed into 98, the transmission ratio is doubled, the modules of the big and small teeth are also different, and thus the gearbox with the large rotation speed ratio can be better changed.
The planetary gear gearbox provided by the application can realize a large transmission ratio only by single-stage planetary gear transmission through the structure of the duplicate gear and the double gear rings, is simple in structure and small in size, and can save the space of tools when being used for tools. When the dual-gear transmission mechanism is used, the dual gears and the gear rings with different sizes can be replaced to adapt to and adjust different transmission ratios, and the universality of the transmission mechanism is improved.
The above embodiments are merely illustrative of the technical concepts and features of the present application, and the purpose of the embodiments is to enable those skilled in the art to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the present application are intended to be covered by the scope of the present application.
Claims (10)
1. A planetary transmission, comprising:
the device comprises a shell, a first shell and a second shell, wherein the shell comprises a disc-shaped first shell and a second shell connected with the first shell, and one side of the first shell is provided with an annular bulge extending outwards along the axial direction of the first shell;
a first transmission shaft partially passing through the first housing and protruding from the annular protrusion,
a sun gear disposed on the first transmission shaft on the side protruding from the annular projection,
a first inner gear ring embedded in the annular bulge, the inner side of the first inner gear ring is provided with first teeth,
a gear bracket having a base, at least 2 pins disposed on one side of the base, a first gear and a second gear disposed on the pins, respectively, and a sun gear engaged with the second gear, respectively, the first gear engaged with the first gear, the first gear connected with the second gear,
a second inner gear ring, the inner side of which is provided with second teeth, the second inner gear ring is arranged on the gear bracket, and the second gear is meshed with the second teeth,
and the second transmission shaft is arranged on the side, far away from the second tooth, of the second inner gear ring, passes through the through hole of the second shell and protrudes out of the second shell.
2. The planetary transmission of claim 1,
the first gear and the second gear are connected and combined into a group of duplicate gears.
3. The planetary transmission of claim 1,
the bottom of the second shell is provided with a second receiving part,
the second bearing is arranged in the second accommodating part and sleeved on the second transmission shaft.
4. The planetary transmission of claim 1,
the first housing is provided with a first accommodating part, a first bearing is arranged in the first accommodating part, and the first bearing is sleeved on the first transmission shaft.
5. The planetary transmission of claim 1,
one side of base disposes 3 bolts, the central line of sun gear is in projection on the base is located the center of 3 bolt central lines, disposes first gear and second gear on 3 bolts respectively, the sun gear respectively with 3 second gear meshing.
6. The planetary transmission of claim 1,
the first gear and the second gear have different gear pitch circle diameters.
7. The planetary transmission of claim 1,
the gear reference circle diameter of the second teeth of the second inner gear ring is larger than that of the first teeth of the first inner gear ring, and the first transmission shaft and the second transmission shaft rotate in opposite directions.
8. The planetary transmission of claim 1,
the gear reference circle diameter of the second teeth of the second inner gear ring is smaller than that of the first teeth of the first inner gear ring, and the first transmission shaft and the second transmission shaft rotate in the same direction.
9. The planetary transmission of claim 1,
the first shell is provided with a groove, the outer side of the first inner gear ring is provided with a protrusion matched with the groove, and the first inner gear ring is fixed on the first shell through the protrusion.
10. The planetary transmission of claim 1,
the second shell is cylindrical and is sleeved on the annular bulge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222024302.5U CN218718526U (en) | 2022-07-28 | 2022-07-28 | Planetary gear gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222024302.5U CN218718526U (en) | 2022-07-28 | 2022-07-28 | Planetary gear gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218718526U true CN218718526U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222024302.5U Active CN218718526U (en) | 2022-07-28 | 2022-07-28 | Planetary gear gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218718526U (en) |
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2022
- 2022-07-28 CN CN202222024302.5U patent/CN218718526U/en active Active
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