CN213655619U - Two-gear transmission - Google Patents
Two-gear transmission Download PDFInfo
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- CN213655619U CN213655619U CN202022135737.8U CN202022135737U CN213655619U CN 213655619 U CN213655619 U CN 213655619U CN 202022135737 U CN202022135737 U CN 202022135737U CN 213655619 U CN213655619 U CN 213655619U
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- planet wheel
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 230000008859 change Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
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Abstract
The utility model discloses a two grades of gear transmissions relates to derailleur technical field. The two-gear transmission comprises a gear ring, a planet wheel and a sun wheel, wherein the planet wheel is meshed between the gear ring and the sun wheel, the planet wheel is arranged on a planet wheel carrier, a first one-way rotating mechanism is arranged between the planet wheel and the planet wheel carrier, the planet wheel carrier is also connected with a second one-way rotating mechanism for controlling the rotating direction of the planet wheel carrier, and the rotating directions of the first one-way rotating mechanism and the second one-way rotating mechanism are the same. The utility model discloses utilize first one-way rotary mechanism to change the planet wheel from two-way rotation to unidirectional rotation to make the planet wheel carrier divide into rotatory and two kinds of fixed operating modes through second one-way rotary mechanism. The positive and negative rotation of the sun gear are two rotation ratios respectively, so that the planetary gear has two rotation speed gears, and the power output directions of the gear rings are the same when the two rotation speed gears are adopted, thereby realizing the change of the transmission ratio of the planetary gear and expanding the application range of the planetary gear.
Description
Technical Field
The utility model relates to a derailleur technical field, concretely relates to two grades of gear transmissions.
Background
Planetary gear transmissions are widely used in speed reducers, speed increasers, and speed changing devices in various mechanical transmission systems. Such as automatic transmissions in automobiles, also utilize these characteristics of planetary gears to achieve different gear ratios by changing the relative motion relationships of various members through clutches and brakes.
The existing planetary gear reducer has a fixed transmission ratio and does not have the function of a speed changer. And the planetary gear can rotate bidirectionally along with the rotation direction of the sun gear, the structure of the electric car transmission is complex, the cost is high, and the application of the electric car transmission in low-value products is limited.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a two grades of gear transmissions to solve the problem of traditional planetary gear self unable variable speed among the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
the two-gear transmission comprises a gear ring, a planet wheel and a sun wheel, wherein the planet wheel is meshed between the gear ring and the sun wheel, the planet wheel is arranged on a planet wheel carrier, a first one-way rotating mechanism is arranged between the planet wheel and the planet wheel carrier, the planet wheel carrier is also connected with a second one-way rotating mechanism for controlling the rotating direction of the planet wheel carrier, and the rotating directions of the first one-way rotating mechanism and the second one-way rotating mechanism are the same.
Further, the planet gear carrier include first support body and second support body, first support body and second support body set up respectively in the both sides of planet wheel, the planet wheel passes through planet wheel axle and connects first support body and second support body, be equipped with first one-way rotary mechanism between planet wheel axle both ends and first support body, the second support body respectively.
Further, the first unidirectional rotation mechanism is a first unidirectional bearing.
Further, the first one-way rotating mechanism is a ratchet mechanism.
Furthermore, the ratchet mechanism comprises a ratchet wheel and a pawl, the ratchet wheel is fixed on the planet wheel, the pawl is arranged on the planet wheel carrier in a swinging mode, and the planet wheel carrier is provided with a spring which is connected with the spring and pushes the pawl to swing towards one side of the ratchet wheel.
Furthermore, the second unidirectional rotating mechanism is a second unidirectional bearing, the sun gear is rotatably arranged on a sun gear shaft, and the second unidirectional bearing is arranged between the planet gear carrier and the sun gear shaft.
Further, the planet carrier include first support body and second support body, first support body and second support body set up respectively in the both sides of planet wheel, the planet wheel passes through planet wheel hub connection first support body and second support body, the one-way bearing of second sets up between first support body and sun gear axle, one side of sun gear is equipped with the axle sleeve that passes the second support body.
The utility model has the advantages of as follows:
the utility model discloses utilize first one-way rotary mechanism to change the planet wheel from two-way rotation to unidirectional rotation to divide into rotation and two kinds of fixed operating modes through the one-way rotary mechanism of second with the planet carrier from must fixing or must rotating the direction of rotation that changes into according to the sun gear. The positive and negative rotation of the sun gear are two rotation ratios respectively, so that the planetary gear has two rotation speed gears, and the power output directions of the gear rings are the same when the two rotation speed gears are adopted, thereby realizing the change of the transmission ratio of the planetary gear and expanding the application range of the planetary gear.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic view of a two-speed gear transmission provided in embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic structural diagram of a two-speed gear transmission provided in embodiment 2 of the present invention;
in the figure: 1-sun gear 2-planet gear 3-ring gear 4-sun gear shaft 5-planet gear shaft 6-planet gear carrier 7-first one-way bearing 8-second one-way bearing 9-shaft sleeve 10-ratchet 11-pawl 12-spring 601-first frame 602-second frame.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise" and the like are used for convenience of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered to be the scope of the present invention without substantial changes in the technical contents.
Example 1
Referring to fig. 1-2, the two-gear transmission comprises a gear ring 3, a planet wheel 2 and a sun wheel 1, wherein the planet wheel 2 is engaged between the gear ring 3 and the sun wheel 1, the planet wheel 2 is arranged on a planet wheel carrier 6, a first one-way rotating mechanism is arranged between the planet wheel 2 and the planet wheel carrier 6, the planet wheel carrier 6 is further connected with a second one-way rotating mechanism for controlling the rotating direction of the second one-way rotating mechanism, and the rotating directions of the first one-way rotating mechanism and the second one-way rotating mechanism are the same.
The first unidirectional rotation mechanism in this embodiment is a first unidirectional bearing 7, and the second unidirectional rotation mechanism is a second unidirectional bearing 8. The planet carrier 6 comprises a first carrier body 601 and a second carrier body 602, the first carrier body 601 and the second carrier body 602 are respectively arranged at two sides of the planet wheel 2, the planet wheel 2 is connected with the first carrier body 601 and the second carrier body 602 through a planet wheel shaft 5, and first one-way bearings 7 are respectively arranged between two ends of the planet wheel shaft 5 and the first carrier body 601 and the second carrier body 602. The sun gear 1 is rotatably arranged on a sun gear shaft 4, the second one-way bearing 8 is arranged between the first frame body 601 and the sun gear shaft 4, the sun gear shaft 4 is fixedly arranged, and a shaft sleeve 9 penetrating through the second frame body 602 is arranged on one side of the sun gear 1.
In the present embodiment, the first one-way bearing 7 and the second one-way bearing 8 are both rotatable clockwise and fixed counterclockwise, and the operation process of the two-speed gear transmission is as follows:
low-gear: the sun gear 1 rotates anticlockwise, the planet gear carrier 6 stops rotating unidirectionally due to the limitation of the second unidirectional bearing 8, the sun gear 1 drives the planet gear 2 to rotate clockwise, and the rotation of the planet gear 2 drives the gear ring 3 to rotate clockwise. There is a deceleration process from the sun wheel 1 to the ring wheel 3 by the transmission of the planet wheels 2.
High-speed gear: the sun gear 1 rotates clockwise, the planet gears 2 do not rotate around the planet gear shaft 5 due to the limitation of the first one-way bearing 7 on the planet gear shaft 5, and the planet gear carrier 6 is in a rotatable state at the moment, so that the torque of the sun gear 1 is directly transmitted to the ring gear 3. The rotation speed of the sun gear 1 and the gear ring 3 is 1: 1. And the rotation direction of the ring gear 3 coincides with that at low speed.
The utility model discloses utilize first one-way rotary mechanism to change planet wheel 2 into one-way rotation from two-way rotation to divide into rotation and two kinds of fixed operating modes through second one-way rotary mechanism with planet carrier 6 from must fixing or must rotating to change into the direction of rotation according to sun gear 1. The positive and negative rotation of the sun gear 1 are respectively two rotation ratios, and the power output directions of the gear rings 3 are the same when the two rotation speeds are shifted, so that the change of the transmission ratio of the planetary gear is realized, and the application range of the planetary gear is expanded.
Example 2
Referring to fig. 3, the first unidirectional rotation mechanism in this embodiment is a ratchet mechanism. The ratchet mechanism comprises a ratchet wheel 10 and a pawl 11, the ratchet wheel 10 is fixed on the planet wheel 2, the pawl 11 is arranged on the planet wheel carrier 6 in a swinging mode, a spring 12 is arranged on the planet wheel carrier 6, and the spring 12 is connected with and pushes the pawl 11 to swing towards one side of the ratchet wheel 10. The second unidirectional rotation mechanism in this embodiment may also be a ratchet mechanism.
Above-mentioned one-way bearing and ratchet are the examples only for the illustration, as long as can realize planet carrier 6 and planet wheel 2's unidirectional rotation control, all can be applied to the utility model discloses in, also all belong to the utility model discloses a protection scope.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. A two speed gear transmission characterized by: two grades of gear transmissions include ring gear (3), planet wheel (2) and sun gear (1), planet wheel (2) meshing is between ring gear (3) and sun gear (1), planet wheel (2) set up on planet wheel carrier (6), be equipped with first one-way rotary mechanism between planet wheel (2) and planet wheel carrier (6), planet wheel carrier (6) still are connected with the one-way rotary mechanism of second of its direction of rotation of control, first one-way rotary mechanism is the same with the one-way rotary mechanism's of second direction of rotation.
2. The two speed gear transmission of claim 1, wherein: planet carrier (6) include first support body (601) and second support body (602), first support body (601) and second support body (602) set up respectively in the both sides of planet wheel (2), planet wheel (2) are connected first support body (601) and second support body (602) through planet wheel axle (5), be equipped with first single direction rotary mechanism between planet wheel axle (5) both ends and first support body (601), second support body (602) respectively.
3. The two speed gear transmission according to claim 1 or 2, characterized in that: the first unidirectional rotating mechanism is a first unidirectional bearing (7).
4. The two speed gear transmission of claim 1, wherein: the first unidirectional rotating mechanism is a ratchet mechanism.
5. The two speed gear transmission of claim 4, wherein: the ratchet mechanism comprises a ratchet wheel (10) and a pawl (11), the ratchet wheel (10) is fixed on the planet wheel (2), the pawl (11) is arranged on the planet wheel carrier (6) in a swinging mode, a spring (12) is arranged on the planet wheel carrier (6), and the spring (12) is connected with and pushes the pawl (11) to swing towards one side of the ratchet wheel (10).
6. The two speed gear transmission of claim 1, wherein: the second one-way rotating mechanism is a second one-way bearing (8), the sun gear (1) is rotatably arranged on one sun gear shaft (4), and the second one-way bearing (8) is arranged between the planet gear carrier (6) and the sun gear shaft (4).
7. The two speed gear transmission of claim 6, wherein: planet carrier (6) include first support body (601) and second support body (602), first support body (601) and second support body (602) set up respectively in the both sides of planet wheel (2), planet wheel (2) are through planet wheel axle (5) connection first support body (601) and second support body (602), second one-way bearing (8) set up between first support body (601) and sun gear axle (4), one side of sun gear (1) is equipped with axle sleeve (9) of passing second support body (602).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022135737.8U CN213655619U (en) | 2020-09-25 | 2020-09-25 | Two-gear transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022135737.8U CN213655619U (en) | 2020-09-25 | 2020-09-25 | Two-gear transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213655619U true CN213655619U (en) | 2021-07-09 |
Family
ID=76698203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022135737.8U Expired - Fee Related CN213655619U (en) | 2020-09-25 | 2020-09-25 | Two-gear transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213655619U (en) |
-
2020
- 2020-09-25 CN CN202022135737.8U patent/CN213655619U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210709 |