CN215257677U - Coaxial double-motor inferior double-speed-ratio electric drive assembly and electric automobile - Google Patents
Coaxial double-motor inferior double-speed-ratio electric drive assembly and electric automobile Download PDFInfo
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- CN215257677U CN215257677U CN202121582182.XU CN202121582182U CN215257677U CN 215257677 U CN215257677 U CN 215257677U CN 202121582182 U CN202121582182 U CN 202121582182U CN 215257677 U CN215257677 U CN 215257677U
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Abstract
The utility model relates to a new forms of energy pure electric vehicles technical field especially relates to a coaxial bi-motor inferior double speed ratio electric drive assembly and electric automobile. The coaxial double-motor extra-inferior double-speed-ratio electric drive assembly comprises a first drive motor, a second drive motor, a primary gear pair, a secondary gear pair, an intermediate shaft and a differential assembly, wherein the first drive motor and the second drive motor are coaxially arranged and can be independently driven, single-motor drive or double-motor simultaneous drive can be selected according to specific driving requirements, and the requirements of the whole vehicle on power performance and economy can be well considered; one-level gear pair and secondary gear pair parallel arrangement are located between first driving motor and the second driving motor, and first driving motor directly transmits power for the jackshaft through the one-level gear pair, and the second driving motor directly transmits power for jackshaft and differential mechanism assembly through the secondary gear pair, can shorten the axial length of jackshaft, make assembly structure compacter, and the whole car of being convenient for arranges with low costs.
Description
Technical Field
The utility model relates to a new forms of energy pure electric vehicles technical field especially relates to a coaxial bi-motor inferior double speed ratio electric drive assembly and electric automobile.
Background
At present, an existing new energy pure electric vehicle generally adopts an electric drive assembly structure with a single motor and a single speed ratio reducer, and in order to achieve faster starting and acceleration response, motor torque needs to be increased or the speed ratio of the reducer needs to be improved; in order to meet the requirements of high-speed stable and silent power output, the highest working rotating speed of a motor needs to be improved, and the gear machining and electric drive assembly precision is improved; in order to achieve higher comprehensive utilization efficiency of the electric drive assembly, the electric drive assembly needs to achieve high system efficiency in a wide rotating speed range. The electric drive assembly of the single-motor single-speed-ratio speed reducer is difficult to be considered, and meanwhile, the cost of the electric drive assembly is greatly increased due to the large motor torque and the high manufacturing precision, so that the requirements of users cannot be completely met.
Therefore, a coaxial dual-motor extra dual-speed ratio electric drive assembly is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coaxial bi-motor attaches inferior double speed and compares electric drive assembly, can compromise better whole car dynamic nature and economic nature demand, and compact structure, whole car arrange flexibility, with low costs simultaneously.
Another object of the utility model is to provide an electric automobile, through using above-mentioned coaxial bi-motor to attach inferior double speed than electric drive assembly, the whole car is arranged in a flexible way, controls simply conveniently, and is with low costs.
In order to realize the purpose, the following technical scheme is provided:
in a first aspect, a coaxial dual-motor extra-dual-speed-ratio electric drive assembly is provided, and comprises a first drive motor, a second drive motor, a primary gear pair, a secondary gear pair, an intermediate shaft and a differential assembly, wherein the first drive motor and the second drive motor are coaxially arranged and can be driven independently; the primary gear pair and the secondary gear pair are arranged in parallel and are positioned between the first driving motor and the second driving motor, the first driving motor directly transmits power to the intermediate shaft through the primary gear pair, and the second driving motor directly transmits power to the intermediate shaft and the differential assembly through the secondary gear pair.
As an alternative of the coaxial dual-motor extra-inferior double-speed-ratio electric drive assembly, the primary gear pair comprises a primary driving gear and a primary driven gear which are sequentially in transmission meshing, the primary driving gear is coaxially connected with the output end of the first driving motor in a transmission manner, and the primary driven gear is coaxially connected with the intermediate shaft in a transmission manner.
As an alternative of the coaxial dual-motor extra-dual-speed-ratio electric drive assembly, the primary gear pair further comprises a one-way clutch, and the primary driving gear is in transmission connection with the output end of the first driving motor through the one-way clutch; or the first-stage driven gear is in transmission connection with the intermediate shaft through the one-way clutch.
As an alternative of the coaxial dual-motor extra-inferior double-speed-ratio electric drive assembly, the secondary gear pair comprises a secondary driving gear, a secondary transition gear and a secondary driven gear which are sequentially in transmission engagement, the secondary driving gear is in coaxial transmission connection with the output end of the second driving motor, the secondary transition gear is in coaxial transmission connection with the intermediate shaft, and the secondary driven gear is fixedly connected with a shell of the differential assembly.
As an alternative to the coaxial dual-motor dual-speed-ratio electric drive assembly, the coaxial dual-motor dual-speed-ratio electric drive assembly further includes a primary input shaft, and the output end of the first driving motor is splined to the primary input shaft.
As an alternative to the coaxial dual-motor dual-speed-ratio electric drive assembly, the coaxial dual-motor dual-speed-ratio electric drive assembly further comprises a secondary input shaft, the output end of the second driving motor is in splined connection with the secondary input shaft, and the secondary input shaft is coaxially and rotationally matched with the primary input shaft.
As an alternative of the coaxial dual-motor extra-dual-speed-ratio electric drive assembly, the secondary driving gear is coaxially and fixedly connected with the secondary input shaft, and the secondary transition gear is coaxially and fixedly connected with the intermediate shaft.
As an alternative to the coaxial dual motor, which is additionally required for a two-speed-ratio electric drive assembly, the intermediate shaft is parallel to the secondary input shaft.
As an alternative to the coaxial dual-motor extra-dual-speed-ratio electric drive assembly, the rotating shaft of the secondary driven gear is fixedly connected with the shell of the differential assembly through bolting, riveting or welding.
In a second aspect, an electric vehicle is provided that includes a coaxial dual-motor and dual-speed-ratio electric drive assembly as described above.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a coaxial bi-motor inferior bivelocity ratio electric drive assembly, including first driving motor, second driving motor, primary gear pair, secondary gear pair, jackshaft and differential mechanism assembly, first driving motor and the coaxial setting of second driving motor and can independently drive, can be according to concrete needs of traveling, select single motor drive or bi-motor simultaneous drive, can compromise whole car dynamic nature and economic nature demand better; one-level gear pair and secondary gear pair parallel arrangement are located between first driving motor and the second driving motor, and first driving motor directly transmits power for the jackshaft through the one-level gear pair, and the second driving motor directly transmits power for jackshaft and differential mechanism assembly through the secondary gear pair, can shorten the axial length of jackshaft, make assembly structure compacter, and the whole car of being convenient for arranges with low costs.
The utility model provides an electric automobile, through using above-mentioned coaxial bi-motor to attach inferior double speed than electric drive assembly, whole car is arranged in a flexible way, controls simply conveniently, and is with low costs.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first coaxial dual-motor extra dual-speed ratio electric drive assembly according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second coaxial dual-motor extra dual speed ratio electric drive assembly according to an embodiment of the present invention.
Reference numerals:
1-a first drive motor;
2-a second drive motor;
3-a first-stage gear pair; 31-a primary drive gear; 32-primary driven gear; 33-one-way clutch;
4-a secondary gear pair; 41-a secondary drive gear; 42-a secondary transition gear; 43-a secondary driven gear;
5-a primary input shaft;
6-a secondary input shaft;
7-intermediate shaft;
8-a differential assembly;
9-left half shaft;
10-right half shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1-2, the embodiment provides a coaxial dual-motor extra-dual-speed-ratio electric drive assembly, which includes a first drive motor 1, a second drive motor 2, a primary gear pair 3, a secondary gear pair 4, an intermediate shaft 7 and a differential assembly 8, wherein the first drive motor 1 and the second drive motor 2 are coaxially arranged and can be independently driven, and single-motor drive or dual-motor drive can be selected according to specific driving requirements, so that the power performance and economic requirements of the whole vehicle can be better considered; one-level gear pair 3 and secondary gear pair 4 parallel arrangement are located between first driving motor 1 and second driving motor 2, and first driving motor 1 directly transmits power for jackshaft 7 through one-level gear pair 3, and second driving motor 2 directly transmits power for jackshaft 7 and differential mechanism assembly 8 through secondary gear pair 4, but the axial length of jackshaft 7 of shortening makes assembly structure compacter, and the whole car of being convenient for arranges, and is with low costs.
The coaxial double-motor extra-inferior double-speed-ratio electric drive assembly further comprises a left half shaft 9 and a right half shaft 10, and two ends of the differential assembly 8 are respectively connected with the left half shaft 9 and the right half shaft 10 of the whole vehicle through splines to transmit the torque of the driving motor to wheels to drive the whole vehicle to run.
The first driving motor 1 forms a first speed ratio through a primary gear pair 3 and a secondary gear pair 4; the second driving motor 2 forms a second speed ratio through the inferior secondary gear pair 4; through the cooperation of the first driving motor 1, the second driving motor 2, the primary gear pair 3 and the secondary gear pair 4, multiple working modes such as double-motor combined driving, single-motor efficient driving and single-motor efficient braking energy recovery can be realized, and the requirements of the whole vehicle on dynamic property and economy under different working conditions are met.
Optionally, the primary gear pair 3 includes a primary driving gear 31 and a primary driven gear 32, which are in sequential transmission engagement, the primary driving gear 31 is in coaxial transmission connection with the output end of the first driving motor 1, and the primary driven gear 32 is in coaxial transmission connection with the intermediate shaft 7.
Preferably, the coaxial dual-motor extra-double-speed-ratio electric drive assembly further comprises a primary input shaft 5, and the output end of the first drive motor 1 is in splined connection with the primary input shaft 5. The first driving motor 1 includes a motor stator and a motor rotor (not shown), the rotor of the first driving motor 1 is connected with the first-stage input shaft 5 through a spline, and the first-stage driving gear 31 is in coaxial transmission connection with the first-stage input shaft 5.
Optionally, as shown in fig. 1, the primary gear pair 3 further includes a one-way clutch 33, and the primary driven gear 32 is in transmission connection with the intermediate shaft 7 through the one-way clutch 33, so that the first driving motor 1 can drive the intermediate shaft 7 to rotate through the primary gear pair 3, but the rotation of the intermediate shaft 7 cannot be transmitted to the first driving motor 1 through the primary gear pair 3, and the follow-up loss of the first driving motor 1 and the mechanical loss of the first speed reduction mechanism 3 are reduced. Through one-way clutch 33's setting, the coaxial bi-motor extra quality dual-speed ratio electric drive assembly that this embodiment provided compares the electric drive assembly among the prior art, can save the setting of synchronous ware, makes the structure of assembly simpler, and does not have the power interruption and the impact that the dual-speed ratio was shifted or the mode switching, and the whole car travelling comfort is better, and spare part is few simultaneously, manufacturing is easy, and the assembly is with low costs. In other embodiments, as shown in fig. 2, the primary driving gear 31 may also be in transmission connection with the output end (specifically, the primary input shaft 5) of the first driving motor 1 through a one-way clutch 33.
Preferably, the one-way clutch 33 includes an outer ring and an inner ring, the outer ring of the one-way clutch 33 is coaxially press-fitted into the primary driven gear 32, and the inner ring of the one-way clutch 33 is coaxially press-fitted onto the intermediate shaft 7, thereby realizing one-way transmission from the first driving motor 1 to the intermediate shaft 7. In other embodiments, the outer ring of the one-way clutch 33 may be coaxially press-fitted into the primary driving gear 31, and the inner ring of the one-way clutch 33 may be coaxially press-fitted onto the primary input shaft 5.
In the coaxial two motor extra dimension double speed ratio electric drive assembly that this embodiment provided, secondary gear pair 4 is including the secondary driving gear 41 of transmission meshing in proper order, secondary transition gear 42 and secondary driven gear 43, secondary driving gear 41 is connected with the output coaxial drive of second driving motor 2, secondary transition gear 42 is connected with jackshaft 7 coaxial drive, secondary driven gear 43 and differential mechanism assembly 8's shell fixed connection, thereby realize through secondary gear pair 4 simultaneous drive jackshaft 7 and differential mechanism assembly 8, can shorten the axial length of jackshaft 7 to a certain extent, make the structure of assembly compacter, be convenient for whole car arranges.
Preferably, the coaxial dual-motor extra-double-speed-ratio electric drive assembly further comprises a secondary input shaft 6, the output end of the second drive motor 2 is in splined connection with the secondary input shaft 6, and the secondary input shaft 6 is coaxially and rotationally matched with the primary input shaft 5. Specifically, the second drive motor 2 includes a motor stator and a motor rotor (not shown), and the rotor of the second drive motor 2 is connected to the secondary input shaft 6 by a spline. Further, the secondary input shaft 6 and the primary input shaft 5 are coaxially supported by bearings in a hollow manner.
Illustratively, the secondary driving gear 41 is fixedly connected coaxially with the secondary input shaft 6, the secondary transition gear 42 is fixedly connected coaxially with the intermediate shaft 7, and the rotating shaft of the secondary driven gear 43 is fixedly connected with the housing of the differential assembly 8 by bolting, riveting or welding to ensure the stability of power transmission.
Preferably, the intermediate shaft 7 is parallel to the secondary input shaft 6 and the primary input shaft 5, so that the overall structure of the assembly is more compact, and the whole vehicle arrangement is facilitated.
For convenience of understanding, the working principle of the coaxial dual-motor extra-dual-speed-ratio electric driving assembly provided by the embodiment is as follows:
when the vehicle is in low-speed large load or rapid acceleration, the first driving motor 1 and the second driving motor 2 are driven jointly, and the output torque of the first driving motor 1 is transmitted to the intermediate shaft 7 through the primary input shaft 5, the primary driving gear 31, the one-way clutch 33 and the primary driven gear 32; the output torque of the second driving motor 2 is transmitted to the intermediate shaft 7 through the secondary input shaft 6, the secondary driving gear 41 and the secondary transition gear 42; the torques output by the two motors are converged on the intermediate shaft 7, and then transmitted to the differential assembly 8 through the secondary transition gear 42 and the secondary driven gear 43, and then transmitted to the wheels through the left half shaft 9 and the right half shaft 10 at the two ends of the differential assembly 8. The combination of the first driving motor 1 and the first speed ratio and the combination of the second driving motor 2 and the second speed ratio provide larger output torque and quick acceleration response for the whole vehicle.
When the vehicle is in medium-high speed cruising or small-load operation, the second driving motor 2 is driven independently, the output torque is transmitted to the differential assembly 8 through the secondary input shaft 6, the secondary driving gear 41, the secondary transition gear 42 and the secondary driven gear 43, and then is transmitted to the wheels through the left half shaft 9 and the right half shaft 10 at the two ends of the differential assembly 8; the first driving motor 1 stops, the intermediate shaft 7 drives the inner ring of the one-way clutch 33 to rotate, and the outer ring of the one-way clutch 33 and the first-stage driven gear 32 do not rotate along with the intermediate shaft 7, so that the follow-up loss of the first driving motor 1 and the mechanical loss of the first-stage gear pair 3 can be reduced; meanwhile, the second driving motor 2 and the high-efficiency area matched with the second speed ratio are relatively gathered, so that the comprehensive use efficiency of the electric drive assembly is better ensured to be improved;
during deceleration or braking, the braking energy of the whole vehicle is transmitted into the differential assembly 8 through the wheels, the left half shaft 9 and the right half shaft 10, and then transmitted to the secondary driven gear 43 and the secondary transition gear 42 to the intermediate shaft 7 through the differential assembly 8; at this time, the first driving motor 1 is stopped, the intermediate shaft 7 drives the inner ring of the one-way clutch 33 to rotate, and the outer ring of the one-way clutch 33 and the primary driven gear 32 do not rotate along with the intermediate shaft 7; the whole braking energy of the whole vehicle passes through the secondary transition gear 42 and the secondary driving gear 41 on the intermediate shaft 7 to drag the second driving motor 2 to generate electricity, so that the high-efficiency recovery of the braking energy is realized.
The embodiment also provides an electric automobile, which comprises the coaxial dual-motor inferior dual-speed-ratio electric drive assembly, and by applying the coaxial dual-motor inferior dual-speed-ratio electric drive assembly, the whole automobile is flexible in arrangement, simple and convenient to operate and low in cost.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A coaxial double-motor extra-inferior double-speed-ratio electric drive assembly is characterized by comprising a first drive motor (1), a second drive motor (2), a primary gear pair (3), a secondary gear pair (4), an intermediate shaft (7) and a differential assembly (8), wherein the first drive motor (1) and the second drive motor (2) are coaxially arranged and can be driven independently; the primary gear pair (3) and the secondary gear pair (4) are arranged in parallel and are positioned between the first driving motor (1) and the second driving motor (2), the first driving motor (1) directly transmits power to the intermediate shaft (7) through the primary gear pair (3), and the second driving motor (2) directly transmits power to the intermediate shaft (7) and the differential assembly (8) through the secondary gear pair (4).
2. The assembly according to claim 1, characterized in that said primary gear pair (3) comprises a primary driving gear (31) and a primary driven gear (32) in sequential transmission engagement, said primary driving gear (31) being in coaxial transmission connection with the output of said first driving motor (1), said primary driven gear (32) being in coaxial transmission connection with said intermediate shaft (7).
3. The coaxial dual-motor mediocre dual-speed-ratio electric drive assembly according to claim 2, wherein the primary gear pair (3) further comprises a one-way clutch (33), and the primary driving gear (31) is in transmission connection with the output end of the first driving motor (1) through the one-way clutch (33); or the primary driven gear (32) is in transmission connection with the intermediate shaft (7) through the one-way clutch (33).
4. The assembly according to any one of claims 1 to 3, wherein the secondary gear pair (4) comprises a secondary driving gear (41), a secondary transition gear (42) and a secondary driven gear (43) which are in transmission engagement in sequence, the secondary driving gear (41) is in coaxial transmission connection with the output end of the second driving motor (2), the secondary transition gear (42) is in coaxial transmission connection with the intermediate shaft (7), and the secondary driven gear (43) is fixedly connected with the housing of the differential assembly (8).
5. The coaxial dual-motor mediocre dual-speed-ratio electric drive assembly according to claim 4, further comprising a primary input shaft (5), wherein the output end of the first drive motor (1) is splined to the primary input shaft (5).
6. The coaxial dual-motor mediocre dual-speed-ratio electric drive assembly according to claim 5, further comprising a secondary input shaft (6), wherein the output end of the second driving motor (2) is in splined connection with the secondary input shaft (6), and the secondary input shaft (6) is coaxially and rotationally matched with the primary input shaft (5).
7. The assembly according to claim 6, characterized in that said secondary driving gear (41) is coaxially and fixedly connected to said secondary input shaft (6) and said secondary transition gear (42) is coaxially and fixedly connected to said intermediate shaft (7).
8. The coaxial two-motor extra-high two-speed ratio electric drive assembly according to claim 6, characterized in that the intermediate shaft (7) is parallel to the secondary input shaft (6).
9. The coaxial dual-motor extra-high dual-speed-ratio electric drive assembly according to claim 4, characterized in that the rotating shaft of the secondary driven gear (43) is fixedly connected with the housing of the differential assembly (8) by bolting, riveting or welding.
10. An electric vehicle comprising a coaxial dual-motor and dual-speed-ratio electric drive assembly as claimed in any one of claims 1-9.
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| CN202121582182.XU CN215257677U (en) | 2021-07-13 | 2021-07-13 | Coaxial double-motor inferior double-speed-ratio electric drive assembly and electric automobile |
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| CN202121582182.XU CN215257677U (en) | 2021-07-13 | 2021-07-13 | Coaxial double-motor inferior double-speed-ratio electric drive assembly and electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464620A (en) * | 2021-07-13 | 2021-10-01 | 中国第一汽车股份有限公司 | Coaxial double-motor double-speed-ratio electric drive assembly and electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464620A (en) * | 2021-07-13 | 2021-10-01 | 中国第一汽车股份有限公司 | Coaxial double-motor double-speed-ratio electric drive assembly and electric automobile |
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