CN216290454U - Coaxial driving motor - Google Patents

Abstract

The utility model relates to a coaxial driving motor, which comprises a shell, a first end cover, a second end cover, a stator assembly, a rotor assembly, a first bearing and a second bearing, wherein the first end cover is provided with a first annular protruding part protruding into an inner cavity of the shell and a first accommodating cavity, the first accommodating cavity is arranged on the first annular protruding part, the first bearing is arranged in the first accommodating cavity, the second end cover is provided with a second annular protruding part protruding into the inner cavity of the shell and a second accommodating cavity, the second accommodating cavity is arranged on the second annular protruding part, and the second bearing is arranged in the second accommodating cavity. Through establishing the first bearing in the first holding intracavity of first end cover, establish the second bearing in the second holding intracavity of second end cover, make full use of the inner chamber space of casing avoids establishing the length that increases the rotor shaft because first bearing and second bearing spare are in the casing outside for coaxial drive motor compact structure, thereby reduce the axial dimensions of rotor shaft, and then reduce coaxial drive motor's length.

Description

Coaxial driving motor

Technical Field

The utility model relates to the technical field of new energy automobile driving, in particular to a coaxial driving motor.

Background

With the development of new energy automobile technology, the technology of a new energy automobile driving motor appears, and the driving motor directly transmits power to a differential mechanism through a speed reducing mechanism so as to drive an automobile.

The axial length of a driving motor of the existing coaxial electric drive axle is long, which is not beneficial to the configuration of the coaxial electric drive axle.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a drive motor having a compact structure in response to the problem that the axial length of the coaxial drive motor is long.

The utility model provides a coaxial-type driving motor, includes casing, first end cover, second end cover, stator module and rotor subassembly, coaxial-type driving motor still includes:

the first end cover is provided with a first annular protruding part protruding into the inner cavity of the shell and a first accommodating cavity, at least part of the first accommodating cavity is arranged in the first annular protruding part, and the first bearing is arranged in the first accommodating cavity;

and the second end cover is provided with a second annular protruding part protruding into the inner cavity of the shell and a second accommodating cavity, at least part of the second accommodating cavity is arranged in the second annular protruding part, and the second bearing is arranged in the second accommodating cavity.

In one embodiment, the coaxial driving motor further comprises a first bearing seat and a second bearing seat, the first bearing seat is installed in the first accommodating cavity, and the first bearing seat and the first end cover are integrally formed; and/or

The second bearing seat is arranged in the second accommodating cavity, and the second bearing seat and the second end cover are integrally formed.

In one embodiment, the radial dimension of the first annular protrusion gradually decreases from the outside of the housing to the inner cavity of the housing in the axial direction of the housing; and/or

The radial dimension of the second annular protrusion gradually decreases from the outside of the housing to the inner cavity of the housing in the axial direction of the housing.

In one embodiment, the coaxial driving motor further includes a first oil seal and a second oil seal, the first end cap has a third receiving cavity, the third receiving cavity is disposed further from the inner cavity of the housing than the first receiving cavity along the axial direction of the housing, and the first oil seal is disposed in the third receiving cavity;

the second end cover is provided with a fourth accommodating cavity, the fourth accommodating cavity is far away from the inner cavity of the shell compared with the second accommodating cavity along the axial direction of the shell, and the second oil seal piece is arranged in the fourth accommodating cavity;

wherein, first oil blanket spare and second oil blanket spare homoenergetic cooperate with the rotor shaft of rotor subassembly to the inner chamber of sealed casing.

In one embodiment, the oil seal device further comprises a first oil seal seat and a second oil seal seat, the first oil seal piece is installed in the third accommodating cavity through the first oil seal seat, and the first oil seal seat and the first end cover are integrally formed; and/or

The second oil seal piece is installed in the fourth accommodating cavity through a second oil seal seat, and the second oil seal seat and the second end cover are integrally formed.

In one embodiment, the second end cap has a fifth accommodating cavity, the fifth accommodating cavity is located between the fourth accommodating cavity and the second accommodating cavity along the axial direction of the housing, and the coaxial driving motor further includes a rotation transformer assembly, and the rotation transformer assembly is located in the fifth accommodating cavity.

In one embodiment, the housing further comprises a fastener, and the fastener is arranged through the first end cover, the housing and the second end cover to connect the first end cover, the housing and the second end cover to each other.

In one embodiment, the fastener is at least partially exposed at the outside of the housing.

In one embodiment, at least one end of the rotor shaft of the rotor assembly has a splined portion for driving connection with an external component.

In one embodiment, the shell further comprises a wiring piece electrically connected with the three-phase wiring harness of the coaxial type driving motor, and the wiring piece is fixedly connected with the outer wall of the shell;

the junction piece has a three-phase interface through which the junction piece electrically connects the three-phase wire harness with the external power supply apparatus.

Above-mentioned coaxial-type driving motor through locating the first bearing in the first holding intracavity of first end cover, locates the second bearing in the second holding intracavity of second end cover, and the inner chamber space of make full use of casing for coaxial-type driving motor compact structure, thereby reduced the length of rotor shaft, and then reduced coaxial-type driving motor's length.

Drawings

Fig. 1 is a schematic structural diagram of a coaxial driving motor according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a housing and a first end cap according to an embodiment of the utility model;

FIG. 3 is a schematic structural view of a second end cap according to an embodiment of the utility model;

FIG. 4 is a schematic view of a stator assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention.

Description of reference numerals:

100. a coaxial drive motor; 10. a first end cap; 11. a first bearing housing; 12. a first accommodating cavity; 13. A first annular projecting portion; 14. a third accommodating cavity; 15. a first oil seal; 16. a first oil seal seat; 20. A second end cap; 21. a second bearing housing; 22. a second accommodating cavity; 23. a second annular projecting portion; 24. a fourth accommodating cavity; 25. a second oil seal; 26. a second oil seal seat; 27. a fifth accommodating cavity; 30. a housing; 31. A fastener; 32. a wiring member; 321. a three-phase interface; 322. a junction box; 323. a cover plate; 324. a wire holder; 33. a cooling water channel; 40. a rotation change assembly; 41. a rotary transformer stator; 42. a rotary transformer rotor; 43. a limiting member; 50. a stator assembly; 51. a stator core; 52. a stator winding; 60. a rotor assembly; 61. a rotor shaft; 611. a spline section; 612. a first shoulder; 613. a journal; 614. a second shoulder; 62. a first bearing; 63. a second bearing; 64. rotor core and magnet steel.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

Fig. 1 shows a schematic structural diagram of a coaxial drive motor 100 in an embodiment of the present application. For the purpose of illustration, the drawings show only the structures associated with embodiments of the utility model.

Referring to the drawings, the present application provides an embodiment of a coaxial type driving motor 100 including a housing 30, a first end cap 10, a second end cap 20, a stator assembly 50, and a rotor assembly 60. The first and second end caps 10 and 20 are respectively assembled to both sides of the housing 30 along the axial direction thereof, the stator assembly 50 is pressed into the cavity of the housing 30 by shrink fitting, the stator assembly 50 is disposed around the rotor assembly 60, and both ends of the stator assembly protrude out of the first and second end caps 10 and 20. In the embodiment of the present application, the rotor shaft 61 is a hollow shaft through which the half shaft for the coaxial electric drive axle passes.

As shown in fig. 1 and fig. 2, fig. 2 shows a schematic structural diagram of the housing and the first end cap in an embodiment of the present invention, the coaxial driving motor 100 further includes a first bearing 62 and a second bearing 63, the first end cap 10 has a first receiving cavity 12, the first end cap 10 has a first annular protrusion 13 protruding from an inner cavity of the housing 30, the first receiving cavity 12 is disposed in the first annular protrusion 13, and the first bearing 62 is disposed in the first receiving cavity 12.

Similarly, fig. 3 shows a schematic structural diagram of the housing and the first end cap in an embodiment of the present invention, as shown in fig. 3, the second end cap 20 has a second receiving cavity 22, the second end cap 20 has a second annular protrusion 23 protruding from the inner cavity of the housing 30, the second receiving cavity 22 is disposed on the second annular protrusion 23, and the second bearing 63 is disposed in the second receiving cavity 22.

In this way, by configuring the first end cap 10 to have a first annular protrusion 13 extending toward the inner cavity of the housing 30, configuring the second end cap 20 to have a second annular protrusion 23 extending toward the inner cavity of the housing 30, and configuring the first bearing 62 and the second bearing 63 in the accommodating cavities of the first annular protrusion 13 and the second annular protrusion 23 of the housing 30, the space of the inner cavity of the housing 30 can be fully utilized, the structure of the coaxial driving motor 100 is more compact, and the axial size of the rotor shaft 61 is reduced.

Referring to fig. 2 again, in particular, the coaxial driving motor 100 further includes a first bearing seat 11, and the first bearing seat 11 is installed in the first accommodating cavity 12. The bearing seat can ensure that the bearing is more reliably installed. Further, the first bearing housing 11 is integrally formed with the first end cap 10. Thus, the installation process of the first bearing seat 11 relative to the first end cover 10 can be simplified, the assembly difficulty can be reduced, and in addition, the coaxial drive motor 100 can be further made to be compact.

Similarly, referring to fig. 3 again, the coaxial driving motor 100 may further include a second bearing housing 21, and the second bearing housing 21 is installed in the second accommodating cavity 22. The bearing seat can ensure that the bearing is more reliably installed. The second bearing housing 21 is integrally formed with the second end cap 20. Thus, the installation process of the second bearing seat 21 relative to the second end cover 20 can be simplified, the assembly difficulty can be reduced, and in addition, the coaxial drive motor 100 can be further made to be compact in structure.

In other embodiments, the first bearing seat 11 and the first end cap 10 may be integrally formed, and the second bearing seat 21 and the second end cap 20 may be integrally formed, which is not limited herein.

Referring again to fig. 2, in some embodiments, the radial dimension of the first annular protrusion 13 gradually decreases from the outside of the housing 30 to the inner cavity of the housing 30 along the axial direction of the housing 30. In this way, the first end cap 10 can be guided to be attached to and detached from the housing 30, the difficulty of assembly can be reduced, and the strength of the first annular projecting portion 13 can be increased. In particular, in the embodiment of the present application, the first end cap 10 is integrally formed with the housing 30, so that the coaxial type driving motor 100 is more compact.

Referring again to fig. 3, in other embodiments, the radial dimension of the second annular protrusion 23 gradually decreases from the outside of the housing 30 to the inner cavity of the housing 30 along the axial direction of the housing 30. Thus, the second end cap 20 can be guided to be attached to and detached from the housing 30, the difficulty of assembly can be reduced, and the strength of the second annular protrusion 23 can be increased.

In other embodiments, it may be provided that the radial dimensions of the first annular protrusion 13 and the second annular protrusion 23 are gradually reduced from the outside of the housing 30 to the inner cavity of the housing 30 in the axial direction of the housing 30, which is not limited herein.

Referring to fig. 2 again, in some embodiments, the coaxial driving motor 100 includes a first oil seal 15, the first end cap 10 has a third receiving cavity 14, and the first oil seal 15 is disposed in the third receiving cavity 14 to cooperate with the rotor shaft 61 of the rotor assembly 60 to seal the inner cavity of the housing 30. In this way, the lubricating oil of the external device can be prevented from entering the interior of the coaxial drive motor 100 from the first end cap 10 during the rotation of the coaxial drive motor 100, so that the coaxial drive motor 100 fails.

Similarly, referring to fig. 3 again, the coaxial driving motor 100 may further include a second oil seal 25, the second end cap 20 has a fourth receiving cavity 24, and the second oil seal 25 is disposed in the fourth receiving cavity 24 to cooperate with the rotor shaft 61 of the rotor assembly 60 to seal the inner cavity of the housing 30. In this way, the lubricating oil of the external device can be prevented from entering the interior of the coaxial drive motor 100 from the second end cap 20 during the rotation of the coaxial drive motor 100, so that the coaxial drive motor 100 fails.

Referring to fig. 2 again, in the embodiment of the present application, the coaxial driving motor 100 further includes a first oil seal seat 16, and the first oil seal 15 is installed in the third accommodating cavity 14 through the first oil seal seat 16. The arrangement of the oil seal seat can ensure that the installation of the oil seal piece is more reliable. Further, the first oil seal holder 16 is integrally formed with the first end cap 10. Thus, the installation process of the first oil seal 15 relative to the first end cover 10 can be simplified, the assembly difficulty is reduced, and in addition, the coaxial drive motor 100 can be further made to be compact in structure.

Similarly, referring to fig. 3 again, the coaxial driving motor 100 may further include a second oil seal seat 26, and the second oil seal 25 is installed in the fourth accommodating cavity 24 through the second oil seal seat 26. Further, the second oil seal holder 26 is integrally formed with the second end cap 20. Thus, the installation process of the second oil seal 25 relative to the second end cover 20 can be simplified, the assembly difficulty is reduced, and in addition, the coaxial drive motor 100 can be further compact in structure.

In other embodiments, the first oil seal seat 16 may be formed integrally with the first end cap 10, and the second oil seal seat 26 may be formed integrally with the second end cap 20, which is not limited herein.

Specifically, the second end cap 20 has a fifth receiving cavity 27, the fifth receiving cavity 27 is located between the fourth receiving cavity 24 and the second receiving cavity 22 along the axial direction of the housing 30, and the coaxial driving motor 100 further includes a rotating assembly 40, and the rotating assembly 40 is disposed in the fifth receiving cavity 27. In this way, the gap space between the fourth accommodating chamber 24 and the second accommodating chamber 22 can be utilized by the fifth accommodating chamber 27, so that the coaxial drive motor 100 is more compact.

As shown in fig. 3 and 5, fig. 5 is a schematic structural diagram of a rotor assembly in an embodiment of the present application, and in particular, in the embodiment of the present application, the rotation transformer assembly 40 includes a rotation transformer stator 41, a rotation transformer rotor 42, and a limiting member 43. The rotor shaft 61 has a first shoulder 612 and a journal 613, the rotation transformation stator 41 is disposed in the fifth receiving cavity 27 and fixedly connected to the second end cap 20, the rotation transformation rotor 42 is in interference fit with the rotor shaft 61 and axially limited by the first shoulder 612 and the limiting member 43, and the rotation transformation rotor 42 radially abuts against the rotation transformation stator 41. In this way, the rotation stator 41, the rotation rotor 42, and the stopper 43 can be used to control the direction and the rotation speed of the coaxial drive motor 100.

Referring to fig. 1 again, in some embodiments, the housing 30 further includes a fastener 31, and the fastener 31 is disposed through the first end cap 10, the housing 30 and the second end cap 20 to connect the first end cap 10, the housing 30 and the second end cap 20 to each other. In this way, the first end cap 10, the housing 30 and the second end cap 20 can be reliably connected, thereby increasing the load-bearing capacity of the coaxial driving motor 100. In the embodiment of the present application, the fastening member 31 has a plurality, and the plurality of fastening members 31 are arranged along the circumferential direction of the housing 30.

Further, the fastener 31 is at least partially exposed to the outside of the housing 30. Specifically, the housing 30 is disposed in a connecting channel through which the fastening member 31 passes, and the connecting channel has a notch so that the fastening member 31 is at least partially exposed to the outside. Thus, the weight of the housing 30 can be reduced.

In some embodiments, the housing 30 is further provided with a cooling water channel 33 to cool the motor.

Referring again to fig. 5, in some embodiments, at least one end of the rotor shaft 61 of the rotor assembly 60 has a splined portion 611, and the splined portion 611 is used for driving connection with an external component. In this way, by integrating the spline portion 611 with the rotor shaft 61, the axial dimension of the rotor shaft 61 can be reduced, and the coaxial drive motor 100 can be made more compact.

Referring to fig. 2 again, in some embodiments, the housing 30 further includes a connection element 32 electrically connected to the three-phase wire harness of the coaxial driving motor 100, the connection element 32 is fixedly connected to an outer wall of the housing 30, the connection element 32 has a three-phase interface 321, and the connection element 32 electrically connects the three-phase wire harness to an external power supply device through the three-phase interface 321. In this manner, the wire connection member 32 can fix the high-voltage three-phase wire harness led out from the coaxial drive motor 100 and provide a high-voltage three-phase interface for the power supply apparatus of the coaxial drive motor 100. In the embodiment of the present application, the wire connecting member 32 includes a terminal box 322, a cover plate 323, and a wire holder 324, the terminal box 322 has a three-phase interface 321, the terminal box 322 is fixedly connected to the wire holder 324 by bolts, the terminal box 322 is integrally formed with the housing 30, and the cover plate 323 covers the terminal box 322 to seal the terminal box 322.

Fig. 4 shows a schematic structural diagram of a stator assembly in an embodiment of the present application, please refer to fig. 4, specifically, in the embodiment of the present application, a stator assembly 50 includes a stator core 51, a stator winding 52, and a temperature sensor, the stator assembly 50 is installed in an inner cavity of the housing 30 through a shrink fit, the temperature sensor is embedded in the stator winding 52, and after the assembly is completed, an end of the stator winding 52 is filled with glue to achieve sealing, where the temperature sensor is not shown in the drawings.

Referring to fig. 5 again, specifically, in the embodiment of the present application, the rotor assembly 60 further includes a rotor core and a magnetic steel 64, the rotor core and the magnetic steel 64 are connected and torque-transferred with the rotor shaft 61 through a rectangular key, the rotor shaft 61 further has a second shoulder 614, the second shoulder 614 limits the position of the rotor core and the magnetic steel 64, and the rotor core and the magnetic steel 64 are fixed by a lock nut or an interference bushing.

The coaxial driving motor 100 provided by the embodiment of the application has at least the following beneficial effects:

the first bearing is arranged in the first accommodating cavity of the first end cover, the second bearing is arranged in the second accommodating cavity of the second end cover, the inner cavity space of the shell is fully utilized, the phenomenon that the length of the rotor shaft is increased due to the fact that the first bearing and the second bearing are arranged on the outer side of the shell is avoided, the coaxial type driving motor is compact in structure, the axial size of the rotor shaft is reduced, and the length of the coaxial type driving motor is further reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a coaxial-type driving motor, includes casing, first end cover, second end cover, stator module and rotor subassembly, its characterized in that, coaxial-type driving motor still includes:

the first end cover is provided with a first annular protruding part protruding into the inner cavity of the shell and a first accommodating cavity, at least part of the first accommodating cavity is arranged in the first annular protruding part, and the first bearing is arranged in the first accommodating cavity;

the second end cover is provided with a second annular protruding portion protruding into the inner cavity of the shell and a second containing cavity, at least part of the second containing cavity is arranged in the second annular protruding portion, and the second bearing is arranged in the second containing cavity.

2. The coaxial driving motor according to claim 1, further comprising a first bearing seat and a second bearing seat, wherein the first bearing seat is installed in the first accommodating cavity, and the first bearing seat and the first end cap are integrally formed; and/or

The second bearing seat is installed in the second accommodating cavity, and the second bearing seat and the second end cover are integrally formed.

3. The coaxial drive motor according to claim 1, wherein a radial dimension of the first annular protrusion gradually decreases from an outer side of the housing to an inner cavity of the housing in an axial direction of the housing; and/or

The radial dimension of the second annular protrusion gradually decreases from the outside of the housing to the inner cavity of the housing in the axial direction of the housing.

4. The coaxial drive motor according to claim 1, further comprising a first oil seal and a second oil seal, wherein the first end cap has a third receiving cavity, the third receiving cavity is disposed further from the inner cavity of the housing than the first receiving cavity along the axial direction of the housing, and the first oil seal is disposed in the third receiving cavity;

the second end cover is provided with a fourth accommodating cavity, the fourth accommodating cavity is far away from the inner cavity of the shell body along the axial direction of the shell body compared with the second accommodating cavity, and the second oil seal piece is arranged in the fourth accommodating cavity;

the first oil seal piece and the second oil seal piece can be matched with a rotor shaft of the rotor assembly to seal the inner cavity of the shell.

5. The coaxial drive motor according to claim 4, further comprising a first oil seal seat and a second oil seal seat, wherein the first oil seal is mounted in the third accommodating cavity through the first oil seal seat, and the first oil seal seat and the first end cap are integrally formed; and/or

The second oil seal piece is installed in the fourth accommodating cavity through the second oil seal seat, and the second oil seal seat and the second end cover are integrally formed.

6. The coaxial driving motor according to claim 5, wherein the second end cap has a fifth receiving cavity, the fifth receiving cavity is located between the fourth receiving cavity and the second receiving cavity along the axial direction of the housing, and the coaxial driving motor further comprises a rotation transformer assembly, and the rotation transformer assembly is located in the fifth receiving cavity.

7. The coaxial drive motor of claim 1, wherein the housing further comprises fasteners passing through the first end cap, the housing, and the second end cap to connect the first end cap, the housing, and the second end cap to one another.

8. The coaxial drive motor of claim 7, wherein the fastener is at least partially exposed outside of the housing.

9. The coaxial drive motor of claim 1, wherein at least one end of the rotor shaft of the rotor assembly has a splined portion for driving connection with an external component.

10. The coaxial type driving motor according to claim 1, wherein the housing further comprises a wiring member electrically connected to a three-phase wire harness of the coaxial type driving motor, the wiring member being fixedly connected to an outer wall of the housing;

the wiring member has a three-phase interface through which the wiring member electrically connects the three-phase wire harness with an external power supply apparatus.

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