CN110417232B - Electric automobile speed changer - Google Patents
Electric automobile speed changer Download PDFInfo
- Publication number
- CN110417232B CN110417232B CN201910717825.8A CN201910717825A CN110417232B CN 110417232 B CN110417232 B CN 110417232B CN 201910717825 A CN201910717825 A CN 201910717825A CN 110417232 B CN110417232 B CN 110417232B
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- liquid
- cavity
- communicated
- ring conductor
- input shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Details Of Gearings (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention relates to the technical field of automobile equipment, in particular to an electric automobile transmission.A driving cylinder is fixedly connected with an input shaft, a driven cylinder is fixedly connected with an output shaft, a permanent magnet is fixed on the driven cylinder, an annular groove is arranged on the driving cylinder, an inner ring conductor and an outer ring conductor are fixed on the side wall of the annular groove, and the permanent magnet is positioned between the inner ring conductor and the outer ring conductor; the input shaft is rotatably connected with a cooler, and the side wall of the annular groove is provided with a liquid channel; the cooler comprises a liquid injection chamber and a reflux chamber, wherein a hollow part is arranged on the input shaft, the liquid injection chamber is communicated with the hollow part through a liquid inlet hole, the hollow part is communicated with a cavity, and the cavity is communicated with the liquid channel through a liquid outlet hole; the side wall of the chamber is fixed with a fixing sheet. This scheme has increased the moment of torsion transmission through two conductors, absorbs the heat through coolant liquid flows in well kenozooecium, cavity and liquid way, has solved among the prior art not good and have lagged problem when starting with the radiating effect.
Description
Technical Field
The invention relates to the technical field of automobile transmission devices, in particular to an electric automobile transmission.
Background
At present, electric automobiles are a development direction of the automobile industry. Compared with the common fuel powered automobile, the motor technology is adopted for the power of the electric automobile, and the initial output torque of the motor is large, so that the traditional fuel powered automobile transmission does not meet the requirement of the electric automobile, and the cost and the weight of the electric automobile are increased.
In the prior art, patent application No. 201510499178.X discloses a transmission for an electric vehicle, which achieves the purpose of speed regulation by adjusting the meshing area between a cylindrical permanent magnet rotor and a cylindrical conductor, but in the speed regulation process, the cylindrical conductor rotor generates heat due to an eddy current effect, a heat radiating fin is added for heat radiation in the prior art, but the heat radiating effect is not obvious; meanwhile, when the motor is started, the cylindrical permanent magnet rotor needs a certain time to reach the maximum speed, and a certain lag exists.
Disclosure of Invention
The invention aims to provide an electric automobile transmission, which solves the problems that in the prior art, the heat dissipation effect of the transmission is poor and a permanent magnet rotor is lagged when being started.
The scheme is basically as follows:
a transmission of an electric automobile comprises an input shaft and an output shaft, wherein the input shaft is fixedly connected with a driving barrel, the output shaft is fixedly connected with a driven barrel, a permanent magnet is fixed on the driven barrel, an annular groove is formed in the driving barrel, an inner ring conductor and an outer ring conductor are fixed on the side wall of the annular groove, and the permanent magnet is located between the inner ring conductor and the outer ring conductor and has a gap with the inner ring conductor and the outer ring conductor; the input shaft is rotatably connected with a cooler, the side wall of the annular groove is provided with a liquid channel, and the cooler is communicated with the liquid channel.
Has the advantages that: compared with the prior art in which only one outer ring conductor is arranged, the scheme has the advantages that the torque transmission during starting can be increased, the driven cylinder and the output shaft can reach the maximum speed as soon as possible, and the lag time is shortened. The cooler can provide coolant liquid to the liquid way in, lets the coolant liquid absorb the heat that gives out on inner circle conductor and the outer lane conductor, and prior art relatively, cooling speed is fast, is fit for derailleur high speed operation more.
Further, the cooler comprises a liquid injection chamber, a liquid inlet hole and a hollow part are formed in the input shaft, the liquid injection chamber is communicated with the hollow part through the liquid inlet hole, the hollow part is communicated with a cavity, a liquid outlet hole is formed in the side wall of the cavity, and the cavity is communicated with the liquid channel through the liquid outlet hole.
In the process that the cooling liquid is input into the liquid channel, the input shaft can be cooled in the hollow part, and the heating limit of the input shaft is improved; the cavity is arranged on the driving cylinder and can cool the driving cylinder.
Further, the input shaft is fixedly connected with a shaft sleeve, the shaft sleeve is fixed with the driving cylinder, a liquid channel is also arranged on the shaft sleeve, and one end of the liquid channel is communicated with the liquid channel on the driving cylinder through a return pipe.
The shaft sleeve can increase the stability of the driving cylinder relative to the input shaft, and the liquid channel on the shaft sleeve enables cooling liquid to be collected on the output shaft again, so that the cooling liquid can be led out and processed after being cooled.
Furthermore, the cooler also comprises a backflow chamber, the shaft sleeve is rotatably connected with the cooler, and one end of a liquid channel on the shaft sleeve is opened and enters the backflow chamber to be communicated with the backflow chamber.
The cooling liquid can flow into the reflux chamber, and the cooler can be in a static state due to the rotation of the cooler relative to the input shaft and the shaft sleeve, so that the cooling liquid can be conveniently led out and treated.
Furthermore, the cooler is rotatably connected with the shaft sleeve and the input shaft through bearings. The friction loss of the rotary connection of the bearing is less, and the heat generation is less.
Furthermore, a sealing plate is arranged at the center of the corresponding driving cylinder, the edge of the sealing plate is fixed with the side wall of the arc-shaped groove, and the cavity is positioned between the sealing plate and the driving cylinder. The rotating shaft and the input shaft of the cavity are coaxial, and after cooling liquid is filled in the cavity, the gravity center of the cooling liquid in the cavity is ensured to be stable, so that the input shaft and the driving cylinder rotate stably; meanwhile, the cooling liquid can absorb heat on the side wall of the arc-shaped groove in a large area in the cavity, and the heat absorption efficiency of the cooling liquid is improved.
Furthermore, a plurality of fixing sheets are fixed on the side wall of the cavity.
When the stationary blade rotates along with the driving cylinder, the cooling liquid in the cavity can be stirred, so that the relative speed difference between the cooling liquid and the driving cylinder is reduced, the friction between the cooling liquid and the driving cylinder is reduced, the temperature rise of the cooling liquid is reduced, and meanwhile, the cooling liquid can increase the flow rate of the liquid in the liquid outlet hole and the liquid channel under the centrifugal action.
Further, the output shaft is rotatably connected with the closing plate. The closing plate can support the output shaft, improves output shaft operating stability.
Further, a hollow part communicated with the cavity is also arranged in the output shaft. When the fixed plate rotates, a vortex is generated at the center of the driving cylinder, and the vortex enables part of cooling liquid to rapidly enter the hollow part in the output shaft and further flow so as to cool the output shaft and improve the heat resistance of the output shaft.
Further, the driven cylinder is provided with heat dissipation holes. The heat dissipation is carried out in the driven cylinder.
Drawings
Fig. 1 is a schematic cross-sectional view of a first embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a second embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises an input shaft 1, a liquid inlet hole 11, an output shaft 2, a shaft sleeve 31, a driving cylinder 32, an outer ring conductor 33, an inner ring conductor 34, an annular groove 35, a permanent magnet 40, a driven cylinder 41, a sliding sleeve 42, an adjusting mechanism 43, a closing plate 5, a cavity 50, a fixing plate 51, a liquid channel 6, a liquid outlet hole 61, a return pipe 62, a cooler 7, a liquid injection chamber 71 and a return chamber 72.
The first embodiment is basically as follows:
an electric automobile transmission is shown in figure 1 and comprises an input shaft 1 and an output shaft 2, wherein the input shaft 1 is connected with a motor. The input shaft 1 key is connected with a shaft sleeve 31, the shaft sleeve 31 is fixedly connected with a driving cylinder 32 through a bolt, an annular groove 35 is formed in the driving cylinder 32, and an inner ring conductor 34 and an outer ring conductor 33 are fixed on two side walls of the annular groove 35 through screws respectively.
The output shaft 2 is connected with a sliding sleeve 42 in a sliding mode through a spline, the left end of the sliding sleeve 42 is fixedly connected with a driven cylinder 41 through a bolt, a plurality of permanent magnets 40 are fixed on the circumferential surface of the driven cylinder 41 through screws, and the permanent magnets 40 are uniformly distributed on the circumferential surface of the driven cylinder 41 in a circumferential array mode. The driven cylinder 41 is inserted into the annular groove 35 with a gap between the inner ring conductor 34 and the outer ring conductor 33.
The sliding sleeve 42 is rotatably connected with an adjusting mechanism 43 through a bearing. The motor drives the driving cylinder 32 to rotate relative to the driven cylinder 41 through the input shaft 1, the inner ring conductor 34 and the outer ring conductor 33 generate eddy current by cutting magnetic lines of force of the permanent magnet 40, the eddy current generates a magnetic field, so that relative motion between the driven cylinder 41 and the driving cylinder 32 is reduced, and torque transmission is realized. The adjusting mechanism 43 is applied with a force parallel to the axis of the output shaft 2 to drive the sliding sleeve 42 to move left and right on the output shaft 2, so that the effective meshing area between the permanent magnet 40 on the driven cylinder 41 and the inner ring conductor 34 and the outer ring conductor 33 is changed, the torque transmission is changed, and the purpose of adjusting the rotating speed of the output shaft 2 is achieved.
The inner ring conductor 34 and the outer ring conductor 33 generate heat due to eddy current, and the input shaft 1 is provided with an annular cooler 7 for radiating heat to the inner ring conductor 34 and the outer ring conductor 33. The left end and the right end of the cooler 7 are respectively rotatably connected with the input shaft 1 and the shaft sleeve 31 through bearings, and the joint is sealed through a sealing ring. The cooler 7 is internally provided with a liquid injection chamber 71 and a return chamber 72, the liquid injection chamber 71 and the return chamber 72 are separated by a partition plate and a sealing ring, the partition plate is fixed with the inner wall of the cooler 7, and the sealing ring is arranged between the partition plate and the input shaft 1 to play a role in rotary sealing. The input shaft 1 is internally provided with a hollow part with an opening at the right end, the liquid injection chamber 71 is communicated with the hollow part in the input shaft 1 through the liquid inlet hole 11, the liquid injection chamber 71 is connected with a pumping device through a conduit, and the pumping device is used for pumping cooling liquid into the liquid injection chamber 71.
The closing plate 5 is arranged in the central area corresponding to the driving cylinder 32, the edge of the closing plate 5 is sealed with the side wall of the annular groove 35 and fixed by using a screw, and thus a cavity 50 is formed between the closing plate 5 and the driving cylinder 32. The side wall of the annular groove 35 and the shaft sleeve 31 are respectively provided with a plurality of liquid channels 6. The side wall of the cavity 50 is further provided with a plurality of liquid outlet holes 61, one end of the liquid channel 6 close to the cavity 50 is communicated with the cavity 50 through the liquid outlet holes 61, and the other end far away from the cavity 50 is communicated with the liquid channel 6 on the shaft sleeve 31 through a return pipe 62. The liquid channel 6 of the shaft sleeve 31 is opened at one end in the return chamber 72.
When the input shaft 1 rotates relative to the cooler 7, the cooling liquid in the liquid injection chamber 71 of the input shaft 1 flows into the return chamber 72 through the liquid inlet hole 11, the hollow part, the cavity 50, the liquid outlet hole 61, the liquid channel 6 and the return pipe 62 in sequence, and the return chamber 72 is connected with the circulating system through a conduit to enable the cooling liquid to flow circularly. When flowing through the chamber 50 and the fluid channel 6, the cooling fluid absorbs heat from the side wall of the annular groove 35, so that the heat of the inner ring conductor 34 and the outer ring conductor 33 is processed in time. The driven cylinder 41 is provided with heat dissipation holes, which is beneficial to heat dissipation inside the driven cylinder 41.
Example two:
the difference from the first embodiment is that as shown in fig. 2, a plurality of fixing plates 51 are vertically fixed on the sidewall of the chamber 50, and when the driving cylinder 32 rotates, the fixing plates 51 rotate along with the chamber to stir the coolant in the chamber 50, so that the relative speed difference between the coolant and the driving cylinder 32 is reduced, thereby reducing the friction between the coolant and the driving cylinder 32, reducing the temperature rise of the coolant, and at the same time, allowing the coolant to be centrifuged to increase the flow rate of the liquid in the liquid outlet 61 and the liquid channel 6.
The output shaft 2 is rotatably connected with the closing plate 5 through a bearing and sealed by a sealing ring. The output shaft 2 is also provided with a hollow portion inside, which is open at the left end and communicates with the chamber 50. The coolant is agitated by the stationary plate 51 so that the coolant corresponding to the central portion of the driving cylinder 32 forms a vortex flow, which allows a portion of the coolant to rapidly enter the hollow portion of the output shaft 2 and flow against the output shaft 2 to cool the output shaft 2.
The above are merely examples of the present invention, and common general knowledge of known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. The utility model provides an electric automobile derailleur, includes input shaft and output shaft, and input shaft fixedly connected with drives a section of thick bamboo, and output shaft fixedly connected with is followed a section of thick bamboo, is fixed with permanent magnet, its characterized in that on following a section of thick bamboo: the driving cylinder is provided with an annular groove, the side wall of the annular groove is fixedly provided with an inner ring conductor and an outer ring conductor, and the permanent magnet is positioned between the inner ring conductor and the outer ring conductor and has a gap with the inner ring conductor and the outer ring conductor; the input shaft is rotatably connected with a cooler, the side wall of the annular groove is provided with a liquid channel, and the cooler is communicated with the liquid channel; the cooler comprises a liquid injection chamber, a liquid inlet hole and a hollow part are arranged on the input shaft, the liquid injection chamber is communicated with the hollow part through the liquid inlet hole, the hollow part is communicated with a cavity, a liquid outlet hole is formed in the side wall of the cavity, and the cavity is communicated with the liquid channel through the liquid outlet hole; a plurality of fixing sheets are fixed on the side wall of the cavity; the output shaft is also provided with a hollow part communicated with the cavity.
2. The electric vehicle transmission of claim 1, wherein: the input shaft is fixedly connected with a shaft sleeve, the shaft sleeve is fixed with the driving cylinder, a liquid channel is also arranged on the shaft sleeve, and one end of the liquid channel is communicated with the liquid channel on the driving cylinder through a return pipe.
3. The electric vehicle transmission of claim 2, wherein: the cooler also comprises a reflux chamber, the shaft sleeve is rotatably connected with the cooler, and one end of a liquid channel on the shaft sleeve is opened and enters the reflux chamber to be communicated with the reflux chamber.
4. The electric vehicle transmission of claim 3, wherein: and the cooler is rotatably connected with the shaft sleeve and the input shaft by adopting bearings.
5. The electric vehicle transmission of claim 4, wherein: a sealing plate is arranged at the center of the driving cylinder, the edge of the sealing plate is fixed with the side wall of the arc-shaped groove, and the cavity is positioned between the sealing plate and the driving cylinder.
6. The transmission of claim 5, wherein: the output shaft is rotatably connected with the closing plate.
7. The electric vehicle transmission of claim 6, wherein: the driven cylinder is provided with heat dissipation holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910717825.8A CN110417232B (en) | 2019-08-05 | 2019-08-05 | Electric automobile speed changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910717825.8A CN110417232B (en) | 2019-08-05 | 2019-08-05 | Electric automobile speed changer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110417232A CN110417232A (en) | 2019-11-05 |
| CN110417232B true CN110417232B (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910717825.8A Active CN110417232B (en) | 2019-08-05 | 2019-08-05 | Electric automobile speed changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110417232B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615526A (en) * | 2020-12-28 | 2021-04-06 | 诸暨和创磁电科技有限公司 | Vertical permanent magnet speed regulator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434461A (en) * | 1993-03-18 | 1995-07-18 | Boggs, Iii; Paul D. | Shaft mounted eddy current drive |
| CN204013087U (en) * | 2014-06-23 | 2014-12-10 | 比亚迪股份有限公司 | Motor and there is its electric automobile |
| CN105811735A (en) * | 2015-07-24 | 2016-07-27 | 南京艾凌节能技术有限公司 | Integrated permanent magnet speed regulating speed changer |
| CN206237254U (en) * | 2016-10-27 | 2017-06-09 | 蔚来汽车有限公司 | Motor liquid cooling structure |
| CN208128113U (en) * | 2018-04-02 | 2018-11-20 | 河南东晟节能环保股份有限公司 | A kind of novel permanent magnetic driver |
-
2019
- 2019-08-05 CN CN201910717825.8A patent/CN110417232B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434461A (en) * | 1993-03-18 | 1995-07-18 | Boggs, Iii; Paul D. | Shaft mounted eddy current drive |
| CN204013087U (en) * | 2014-06-23 | 2014-12-10 | 比亚迪股份有限公司 | Motor and there is its electric automobile |
| CN105811735A (en) * | 2015-07-24 | 2016-07-27 | 南京艾凌节能技术有限公司 | Integrated permanent magnet speed regulating speed changer |
| CN206237254U (en) * | 2016-10-27 | 2017-06-09 | 蔚来汽车有限公司 | Motor liquid cooling structure |
| CN208128113U (en) * | 2018-04-02 | 2018-11-20 | 河南东晟节能环保股份有限公司 | A kind of novel permanent magnetic driver |
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| Publication number | Publication date |
|---|---|
| CN110417232A (en) | 2019-11-05 |
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