CN108150637B - Multi-gear EV power device - Google Patents
Multi-gear EV power device Download PDFInfo
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- CN108150637B CN108150637B CN201810124651.XA CN201810124651A CN108150637B CN 108150637 B CN108150637 B CN 108150637B CN 201810124651 A CN201810124651 A CN 201810124651A CN 108150637 B CN108150637 B CN 108150637B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/72—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention relates to the technical field of power control, in particular to a multi-gear EV power device. The power transmission device comprises a planetary carrier, a power center wheel shaft, an outer planetary gear, a gear speed changing device, a first motor group, a second motor group and a power output device, wherein the inner sun gear is arranged in the tail end of the planetary carrier, the outer sun gear is arranged in the head end of the planetary carrier, the power center wheel shaft penetrates through the planetary carrier and is connected with the inner sun gear, the outer planetary gear is arranged on the planetary carrier, the head end of the outer planetary gear is meshed with the outer sun gear, the gear speed changing device is arranged in the planetary carrier and is simultaneously meshed with the inner sun gear and the tail end of the outer planetary gear, the first motor group is connected with the head end of the power center wheel shaft, the second motor group is connected with the tail end of the planetary carrier, and the power output device is connected with a power output shaft sleeve formed on the outer sun gear. The invention utilizes the two configured motor groups to input power, and the motor groups can play the roles of a power motor, a gear shifting motor and even a power generation motor according to logic control requirements, thereby being beneficial to realizing the maximization of motor resource application and greatly enriching the diversity of power output modes.
Description
Technical Field
The invention relates to the technical field of power control, in particular to a multi-gear EV power device.
Background
An Electric Vehicle (Electric Vehicle) is a Vehicle equipped with a motor and a battery that replace an engine, an on-Vehicle charger, a storage battery, a control device, and the like, and driven by Electric power of a rechargeable battery instead of gasoline, and has been widely paid attention to and popularized because of its advantages of energy saving, environmental friendliness, portability, lower cost, and the like; the power control device of the electric automobile is mainly composed of a power motor, a gear shifting motor and a speed changer, and the gear shifting function of the automobile can be realized by utilizing the cooperation of the speed changer and the gear shifting motor group to adjust, change and output the power of the power motor. However, the conventional power control device for an electric vehicle still has the following drawbacks: 1. the single differential gear (namely, differential mechanism) or single planetary gear box is adopted as a speed changer, and the speed change and the gear shift are realized through the control of the output power of a power motor and the switching control of the gear ratio of a gear shifting motor to the speed changer, but when the differential gear is adopted as the speed changer, the noise is loud, and obvious impact force or power interruption can be generated in the speed change and gear shift process; when a single planetary gear box is adopted as a transmission, the output rotating speed is too high, and the high-efficiency working area of the power motor is often narrower; 2. the gear shifting motor can only play a role in gear shifting and cannot be shared with the power motor in function, so that the configuration cost of the device is increased and the structural complexity of the device is increased; 3. when the planetary gear box is used as a transmission, the speed change ratio is relatively close, so that the output rotating speed of the device is not conveniently and uniformly divided into multiple high and low speed gears, and the power output mode of the device is weakened.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a multi-gear EV power device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a multi-gear EV power plant comprises a first motor group, a second motor group, a gear speed change device and a power output device; the gear change apparatus includes:
the planetary support is internally provided with a head end cavity and a tail end cavity which are coaxially distributed along the central axis of the planetary support, and the tail end of the planetary support is connected with an output shaft of the second motor unit;
the power center wheel shaft penetrates through the planet carrier along the central axis of the planet carrier, and the head end of the power center wheel shaft is connected with the output shaft of the first motor unit;
the outer sun gear is sleeved on the power center wheel shaft and is positioned in the head end cavity, and a power output shaft sleeve which is distributed through the head end of the planet carrier and is connected with the power output device is formed on the head end surface of the outer sun gear around the power center wheel shaft;
the inner sun gear is arranged on the power center wheel shaft and positioned in the tail end cavity;
the outer planetary gears are arranged on the planetary carrier along the axial direction of the planetary carrier and uniformly distributed around the outer sun gear, and the head end parts of the outer planetary gears are meshed with the outer sun gear;
the inner planetary wheels are arranged in the planetary support along the axial direction of the planetary support and are positioned in the tail end cavity, an inner planetary wheel is arranged between each outer planetary wheel and the inner sun wheel, and each inner planetary wheel is meshed with the inner sun wheel and the tail end part of the corresponding outer planetary wheel.
Preferably, the planet carrier comprises a head end ring part, a tail end disc part, an inner spacing ring part and a plurality of radial supporting arm parts, wherein the tail end disc part is connected with the head end ring part into a whole through a plurality of axial supporting arm parts and is provided with a central shaft hole, the inner spacing ring part is arranged between the head end ring part and the tail end disc part and divides the space between the head end ring part and the tail end disc part into a head end cavity and a tail end cavity, and the radial supporting arm parts are connected with the inner spacing ring part and the axial supporting arm parts into a whole;
the power output shaft sleeve penetrates through the head end ring part to be distributed, the tail end of the power center shaft penetrates through the center shaft hole to be distributed, the outer planetary wheel is arranged between the head end ring part and the tail end disc part, and the inner planetary wheel is arranged between the inner spacing ring part and the tail end disc part; and the output shaft of the second motor unit is connected with the tail end disc part.
Preferably, a first bearing sleeved on the central power wheel shaft is arranged in the central shaft hole, and second bearings are arranged between the inner spacing ring part and the central power wheel shaft and between the outer sun wheel and the central power wheel shaft.
Preferably, the first motor group comprises a first motor, a first front-stage gear and a first rear-stage gear, wherein the first front-stage gear is arranged on an output shaft of the first motor, the first rear-stage gear is parallel to the first front-stage gear and meshed with the first front-stage gear, and the first rear-stage gear is sleeved and fixed at the head end of the center power wheel shaft;
the second motor group comprises a second motor, a second front-stage gear and a second rear-stage gear, the second front-stage gear is arranged on an output shaft of the second motor, the second rear-stage gear is parallel to the second front-stage gear and meshed with the second front-stage gear, and the second rear-stage gear and the planet carrier are coaxially distributed and fixed at the tail end of the planet carrier.
Preferably, the power output device comprises a power output gear sleeved and fixed on the power output shaft sleeve and a differential mechanism which is parallel to the power output gear and meshed with the power output gear.
Preferably, it further comprises an auxiliary power take-off, which is a gear which meshes with the second rear stage gear.
Preferably, a brake or a one-way bearing is further arranged on the output shaft of the first motor and/or the output shaft of the second motor.
Due to the adoption of the scheme, the invention has the following beneficial effects: a. the multi-gear is uniformly distributed, and covers various power output modes such as low speed, medium speed, high speed, overspeed and the like, so that different application requirements can be met; b. the multi-gear speed change function can be realized by logically combining the two motor groups, and the two motors can perform role conversion among the power motor, the gear shifting motor and the power generation motor, so that the utilization rate of motor resources is greatly improved, and the configuration cost and the structural complexity of the whole assembly are reduced; c. through the optimized structure of the gear speed changing device and the power input mode of the double motors, the transmission and conversion effects of the power input to the motors can be guaranteed, the impact force and noise in the gear shifting process are reduced, and the power interruption can be avoided.
Drawings
FIG. 1 is a schematic diagram (one) of the overall structure assembly of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall structure assembly of an embodiment of the present invention;
FIG. 3 is an exploded schematic view of the body member of an embodiment of the present invention;
FIG. 4 is an exploded schematic view of the gear change apparatus of the embodiment of the present invention;
FIG. 5 is an axial cross-sectional schematic view of a gear change apparatus of an embodiment of the present invention;
fig. 6 is a schematic structural view of a planet carrier according to an embodiment of the present invention.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
As shown in fig. 1 to 6, the present embodiment provides a multi-gear EV power device including a first motor group, a second motor group, a gear shift device, and a power output device; wherein, gear change comprises:
a planet carrier 10 having a head end chamber a and a tail end chamber b coaxially disposed along its central axis, and the tail end of the planet carrier 10 being connected (e.g., geared, belt driven, etc.) to the output shaft of the second motor unit;
a power center axle 20 extending through the planetary carrier 10 along a central axis of the planetary carrier 10 (wherein the extending is understood to be extending through and having a relative rotational structural relationship with the planetary carrier), and a head end of the power center axle 20 is connected to an output shaft of the first motor unit (e.g., gear drive connection, belt drive connection, etc.);
an outer sun gear 30, which is sleeved on the power center wheel shaft 20 and is located in the head end cavity a (wherein, the sleeve joint can be understood as that the power center wheel shaft 20 penetrates through the outer sun gear 30 and has a relative rotation structural relationship with the outer sun gear 30), meanwhile, a power output shaft sleeve 40 penetrating through the head end of the planetary carrier 10 (wherein, the sleeve joint can be understood as that the sleeve joint penetrates through and has a relative rotation structural relationship with the planetary carrier) and is connected with the power output device is formed on the head end surface of the outer sun gear 30 around the power center wheel shaft 20;
an inner sun gear 50 disposed on the power center axle 20 and disposed within the rear end cavity b (the arrangement being understood to be either fixed to the power center axle 20 in a nested fashion or integrally formed with the power center axle 20 to maintain a synchronous rotational relationship therebetween);
a plurality of (e.g., three) outer planetary gears 60, the plurality of outer planetary gears 60 being mounted on the planetary carrier 10 in an axial direction of the planetary carrier 10 and being uniformly distributed around the outer sun gear 30 (i.e., equivalent to being uniformly distributed around the inner sun gear 40 at the same time), and a head end portion of the outer planetary gears 60 being engaged with the outer sun gear 30;
and an inner planetary gear 70 installed in the planetary carrier 10 in the axial direction of the planetary carrier 10 and located in the tail end cavity b, wherein one inner planetary gear 70 is disposed between each outer planetary gear 60 and the inner sun gear 50, and each inner planetary gear 70 is simultaneously engaged with the inner sun gear 50 and the tail end of the corresponding outer planetary gear 30.
Therefore, through the structural improvement of the gear speed changing device, two motors can be configured with the gear speed changing device, so that a power control structure of double motors is formed, namely, under the condition that the first motor group and the second motor group are connected with the gear speed changing device at the same time, the two motor groups can be used at the same time or independently and separately used for logic control according to requirements, the whole assembly can output power in multiple modes, and the motor groups can be used as gear shifting motors or power generation motors at the same time through control conversion such as forward rotation and stop of the motor groups, so that the maximization of motor resource utilization is realized; meanwhile, the gear speed change device has various speed change ratios, and can provide a structural basis for quick switching between motors, so that the motors can be guaranteed to operate in a working high-efficiency area more. The method specifically comprises the following steps: 1. when the two motor sets rotate in the same direction, the first motor set inputs power to the gear speed change device through the power center wheel shaft 20 so as to drive the inner sun wheel 50 to rotate, and as the inner sun wheel 50 is in transitional engagement with the outer planetary wheel 60 through the inner planetary wheel 70, the outer sun wheel 30 rotates by utilizing the engagement relationship between the outer planetary wheel 60 and the outer sun wheel 30; meanwhile, the second motor group inputs power to the gear speed change device through the planet carrier 10, and because the outer planet wheel 60 is arranged on the planet carrier 10, the outer planet wheel 60 also synchronously rotates, so that the outer sun wheel 30 rotates by utilizing the meshing relationship between the outer planet wheel 60 and the outer sun wheel 30, and a double-power superposition effect (namely, an acceleration mode) is formed; taking this as an example, a shift pattern such as that shown in table one can be formed by logic control of different motor groups:
as can be seen from the shift pattern shown in table one, the first motor group and the second motor group can be used as power motors and also as shift motors.
2. Taking the case that the first motor group is in a power input state and the second motor group does not perform power input, the first motor group drives the outer sun gear 60 to realize power output through the linkage actions of the power center wheel shaft 20, the inner sun gear 50, the inner planet gear 70 and the outer planet gear 60, and meanwhile, the planetary carrier 10 can be driven to perform actions due to the structural relation between the outer planet gear 60 and the planetary carrier 10, so that the planetary carrier 10 is used as a power input component for the second motor group, and the second motor group can be used as a power generation motor; on the contrary, the second motor group is used as a power input motor of the whole assembly, and the first motor group can be used as a power generation motor.
Based on this, the control assembly of the present embodiment can achieve the following advantageous effects: a. the multi-gear is uniformly distributed, and covers various power output modes such as low speed, medium speed, high speed, overspeed and the like, so that different application requirements can be met; b. the multi-gear speed change function can be realized by logically combining the two motor groups, and the two motors can perform role conversion among the power motor, the gear shifting motor and the power generation motor, so that the utilization rate of motor resources is greatly improved, and the configuration cost and the structural complexity of the whole assembly are reduced; c. through the optimized structure of the gear speed changing device and the power input mode of the double motors, the transmission and conversion effects of the power input to the motors can be guaranteed, the impact force and noise in the gear shifting process are reduced, and the power interruption can be avoided.
In order to optimize the structure of the planet carrier to enhance the structural compactness of the gear shifting device, the planet carrier 10 of the present embodiment includes a head end ring portion 11, a tail end disc portion 13 integrally connected to the head end ring portion 11 through a plurality of axial support arm portions 12 and having a central shaft hole c, an inner spacer ring portion 14 disposed between the head end ring portion 11 and the tail end disc portion 13 and dividing the space between the head end ring portion 11 and the tail end disc portion 13 into a head end cavity a and a tail end cavity b, and a plurality of radial support arm portions 15 integrally connecting the inner spacer ring portion 14 and the axial support arm portions 12; wherein the power output shaft sleeve 40 penetrates through the head end ring portion 11, the tail end of the power center wheel shaft 20 penetrates through the center shaft hole c, the outer planetary wheel 60 is arranged between the head end ring portion 11 and the tail end disk portion 13, and the inner planetary wheel 70 is arranged between the inner spacer ring portion 14 and the tail end disk portion 13; meanwhile, the output shaft of the second motor group is connected with the tail end disk portion 13.
In order to ensure the smoothness of the relative movement between the relevant components, a first bearing 80 sleeved on the central power axle 20 is arranged in the central axle hole c, and a second bearing 90 is arranged between the inner spacer ring part 14 and the central power axle 20 and between the outer sun gear 30 and the central power axle 20. Of course, to facilitate assembly of the entire control assembly to the mounting carrier of the vehicle, corresponding bearings may be provided on either end of the center powered axle 20, on the output shaft of the first motor unit, or on the output shaft of the second motor unit, for example, accordingly.
To maximize the advantages of the transmission gear device, the high-low speed gear ratio is pulled to enhance the performance of the whole assembly, the first motor group of the present embodiment includes a first motor 101, a first front stage transmission gear 102 installed on the output shaft of the first motor 101, and a first rear stage transmission gear 103 parallel to the first front stage transmission gear 102 and meshed with the first front stage transmission gear 102, wherein the first rear stage transmission gear 103 is sleeved and fixed at the head end of the center power axle 20; based on the same structural principle, the second electric motor set of the present embodiment includes a second electric motor 201, a second front stage transmission gear 202 mounted on the output shaft of the second electric motor 201, and a second rear stage transmission gear 203 arranged in parallel with the second front stage transmission gear 202 and meshed with the second front stage transmission gear 202, wherein the second rear stage transmission gear 203 is coaxially arranged with the planet carrier 10 and fixed to the rear end of the planet carrier 10. Therefore, by means of structural collocation of the motor units, the mode that the wheel body diameter of the front-stage gear is smaller than that of the rear-stage gear can be adopted, so that power output by a motor can be input in a transmission speed-changing mode by firstly decelerating, and when the motor is used with a specific gear speed-changing device, sun gears, planet gears and the speed-changing gears can all adopt helical gears, and the power output effect of the assembly can be exerted by combining and mixing multiple specifications of gears.
To maximize the power output effect, the power output apparatus of this embodiment includes a power output gear 301 fitted and fixed to the power output shaft sleeve 40, and a differential gear 302 disposed in parallel with the power output gear 301 and engaged with the power output gear 301.
As a preferred embodiment, the assembly of the present embodiment further includes an auxiliary power output device 400 which is a gear (preferably, a helical gear which is engaged with the speed change gear) which is engaged with the second rear stage speed change gear 203.
In addition, in order to enhance the on-off and braking control effects on the first motor unit and the second motor unit, a brake d or a one-way bearing is further provided on the output shaft of the first motor 101 and/or the output shaft of the second motor 201.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (7)
1. A multi-gear EV power device is characterized in that: the device comprises a first motor unit, a second motor unit, a gear speed changing device and a power output device; the gear change apparatus includes:
the planetary support is internally provided with a head end cavity and a tail end cavity which are coaxially distributed along the central axis of the planetary support, and the tail end of the planetary support is connected with an output shaft of the second motor unit;
the power center wheel shaft penetrates through the planet carrier along the central axis of the planet carrier, and the head end of the power center wheel shaft is connected with the output shaft of the first motor unit;
the outer sun gear is sleeved on the power center wheel shaft and is positioned in the head end cavity, and a power output shaft sleeve which is distributed through the head end of the planet carrier and is connected with the power output device is formed on the head end surface of the outer sun gear around the power center wheel shaft;
the inner sun gear is arranged on the power center wheel shaft and positioned in the tail end cavity;
the outer planetary gears are arranged on the planetary carrier along the axial direction of the planetary carrier and uniformly distributed around the outer sun gear, and the head end parts of the outer planetary gears are meshed with the outer sun gear;
the inner planetary wheels are arranged in the planetary support along the axial direction of the planetary support and are positioned in the tail end cavity, an inner planetary wheel is arranged between each outer planetary wheel and the inner sun wheel, and each inner planetary wheel is meshed with the inner sun wheel and the tail end part of the corresponding outer planetary wheel.
2. A multi-gear EV power device as claimed in claim 1, characterized in that: the planet carrier comprises a head end ring part, a tail end disc part, an inner spacing ring part and a plurality of radial supporting arm parts, wherein the tail end disc part is connected with the head end ring part into a whole through a plurality of axial supporting arm parts and is provided with a central shaft hole, the inner spacing ring part is arranged between the head end ring part and the tail end disc part and divides the space between the head end ring part and the tail end disc part into a head end cavity and a tail end cavity, and the radial supporting arm parts are connected with the inner spacing ring part and the axial supporting arm parts into a whole;
the power output shaft sleeve penetrates through the head end ring part to be distributed, the tail end of the power center shaft penetrates through the center shaft hole to be distributed, the outer planetary wheel is arranged between the head end ring part and the tail end disc part, and the inner planetary wheel is arranged between the inner spacing ring part and the tail end disc part; and the output shaft of the second motor unit is connected with the tail end disc part.
3. A multi-gear EV power device as claimed in claim 2, characterized in that: the first bearing sleeved on the central power wheel shaft is arranged in the central shaft hole, and the second bearings are arranged between the inner spacing ring part and the central power wheel shaft and between the outer sun wheel and the central power wheel shaft.
4. A multi-gear EV power device according to any one of claims 1 to 3, characterized in that:
the first motor group comprises a first motor, a first front-stage gear and a first rear-stage gear, the first front-stage gear is arranged on an output shaft of the first motor, the first rear-stage gear is distributed in parallel with the first front-stage gear and meshed with the first front-stage gear, and the first rear-stage gear is sleeved and fixed at the head end of the center power wheel shaft;
the second motor group comprises a second motor, a second front-stage gear and a second rear-stage gear, the second front-stage gear is arranged on an output shaft of the second motor, the second rear-stage gear is parallel to the second front-stage gear and meshed with the second front-stage gear, and the second rear-stage gear and the planet carrier are coaxially distributed and fixed at the tail end of the planet carrier.
5. The multi-gear EV power device of claim 4, characterized in that: the power output device comprises a power output gear sleeved and fixed on the power output shaft sleeve and a differential mechanism which is parallel to the power output gear and meshed with the power output gear.
6. The multi-gear EV power device of claim 5, characterized in that: the auxiliary power output device is a gear meshed with the second rear-stage gear.
7. The multi-gear EV power device of claim 4, characterized in that: and a brake or a one-way bearing is also arranged on the output shaft of the first motor and/or the output shaft of the second motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810124651.XA CN108150637B (en) | 2018-02-07 | 2018-02-07 | Multi-gear EV power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810124651.XA CN108150637B (en) | 2018-02-07 | 2018-02-07 | Multi-gear EV power device |
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| Publication Number | Publication Date |
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| CN108150637A CN108150637A (en) | 2018-06-12 |
| CN108150637B true CN108150637B (en) | 2023-10-03 |
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| CN201810124651.XA Active CN108150637B (en) | 2018-02-07 | 2018-02-07 | Multi-gear EV power device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019153150A1 (en) * | 2018-02-07 | 2019-08-15 | 深圳市万维博新能源技术有限公司 | Multi-gear ev power device |
| DE102019117758A1 (en) * | 2019-07-02 | 2021-01-07 | Schaeffler Technologies AG & Co. KG | Hybrid transmission with integrated air conditioning compressor for a motor vehicle; as well as motor vehicle |
| CN112958737A (en) * | 2021-03-23 | 2021-06-15 | 江苏威鹰机械有限公司 | New energy car planet carrier forging and production process thereof |
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| DE102004019468A1 (en) * | 2004-04-15 | 2005-11-10 | Keiper Gmbh & Co.Kg | Drive unit for vehicle seat, especially for motor vehicle, has several motors that are combined into multi-motor with common drive output; motors are arranged in motor shafts of motor support of multi-motor |
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| CN108150637A (en) | 2018-06-12 |
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