CN219227361U

CN219227361U - Electric drive system

Info

Publication number: CN219227361U
Application number: CN202223433752.6U
Authority: CN
Inventors: 陈游; 王海洋; 高超
Original assignee: Shanghai Yadi Information Technology Co ltd
Current assignee: Shanghai Yadi Information Technology Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-06-20
Anticipated expiration: 2032-12-21

Abstract

The utility model relates to the technical field of drivers, and particularly discloses an electric driving system, which comprises a shell, a motor module, a transmission module and a controller module, wherein the shell is axially divided into a first cavity, a second cavity and a third cavity in sequence; the motor module comprises a rotor which is arranged in the second cavity and is coaxially and rotatably matched with the shell; the transmission module is arranged in the first cavity, and the rotating shaft of the rotor drives the input shaft of the transmission module to rotate; the controller module is arranged in the third cavity, and a motor phase line of the motor module stretches into the third cavity and is electrically connected with the controller module. For motor module, derailleur module and controller module components of a whole that can function independently setting, and then need three casings, this electric drive system is with motor module, derailleur module and controller module integration in a casing, and this electric drive system has that the integrated level is high, whole volume is littleer, weight is lighter and manufacturing cost is lower advantage.

Description

Electric drive system

Technical Field

The utility model relates to the technical field of drivers, in particular to an electric drive system.

Background

The electric drive system is a core component of the electric vehicle, and with the continuous development of the electric vehicle, the higher the arrangement requirement of the drive system is. The electric drive system is formed by combining a drive motor, a controller and a transmission. In the prior art, a driving motor, a controller and a transmission of an electric driving system are arranged in a split mode, the integration level is low, the self weight is high, and then the problems of large installation space, high manufacturing cost and low stroke conversion rate of a battery of an occupied vehicle are caused.

Therefore, an electric drive system is needed to solve the disadvantages of low integration level, heavy overall weight, large occupied installation space and high cost of mold and materials of the existing electric drive system.

Disclosure of Invention

The utility model aims at: the electric driving system is provided to solve the problems of low integration level, large overall weight, large occupied installation space and high cost of dies and materials of the existing electric driving system in the related technology.

The present utility model provides an electric drive system comprising:

the shell is sequentially divided into a first cavity, a second cavity and a third cavity along the axial direction of the shell;

the motor module comprises a rotor, and the rotor is arranged in the second cavity and is in running fit with the shell;

the transmission module is arranged in the first cavity, and the rotating shaft of the rotor drives the input shaft of the transmission module to rotate;

the controller module is arranged in the third cavity, and a motor phase line of the motor module stretches into the third cavity and is electrically connected with the controller module.

As the preferred technical scheme of electric drive system, the casing includes first casing, second casing and third casing, the second casing is provided with first uncovered and second uncovered along its axial, first casing with second casing rigid coupling and seal first uncovered, the third casing with second casing rigid coupling and seal the second is uncovered, first cavity set up in first casing, the third cavity set up in the third casing, first casing second casing and third casing enclose and establish into the second cavity.

As a preferable technical scheme of the electric drive system, a first annular bulge is convexly arranged at a position, opposite to the first opening, of the first shell, and when the first shell is fixedly connected with the second shell, the first annular bulge is inserted into the second shell through the first opening and is abutted against the inner wall of the second shell;

the third shell is provided with a second annular bulge in a protruding mode at a position opposite to the second opening, and when the third shell is fixedly connected with the second shell, the second annular bulge is inserted into the second shell through the second opening and is abutted to the inner wall of the second shell.

As a preferred technical scheme of the electric drive system, the rotating shaft is inserted into the input shaft along the axial direction of the rotating shaft.

As a preferable technical scheme of the electric drive system, the rotating shaft is integrally formed with the input shaft along the axial direction of the rotating shaft.

As a preferred technical solution of the electric drive system, the spindle extends from the first cavity into the second cavity;

the controller module comprises a controller component and an encoder, the encoder comprises a magnetic ring and a monitoring ring, the magnetic ring is sleeved on the rotating shaft and fixedly connected with the rotating shaft, the monitoring ring is fixedly arranged on the controller module and sleeved on the magnetic ring, and the monitoring ring is electrically connected with the controller component.

As a preferred technical scheme of the electric drive system, the controller assembly comprises a first circuit board and a second circuit board which are arranged at intervals;

the rotating shaft penetrates through the first circuit board and is opposite to the second circuit board, and the monitoring ring is fixedly arranged on the second circuit board.

As the preferable technical scheme of the electric drive system, the monitoring ring is fixedly arranged on the inner wall of the third cavity.

As the preferable technical scheme of electric drive system, the derailleur module still includes action wheel, multistage speed change subassembly and differential mechanism, the action wheel cover is located the input shaft and with the input shaft rigid coupling, the action wheel with multistage speed change subassembly transmission connection, differential mechanism with derailleur casing normal running fit, multistage speed change subassembly drive differential mechanism is around the axis rotation of differential mechanism.

As electric drive system's preferred technical scheme, still include heat dissipation module, heat dissipation module includes the cover body and exhaust fan, the pivot passes the third cavity and part are located outside the casing, the exhaust fan with the pivot rigid coupling, the cover body set firmly in the casing and with the casing encloses to establish into and hold the chamber, the exhaust fan is located hold the intracavity, the cover body with the region that the exhaust fan is relative is provided with a plurality of exhaust holes that are the matrix and arrange.

The beneficial effects of the utility model are as follows:

the utility model provides an electric drive system, which comprises a shell, a motor module, a transmission module and a controller module, wherein the shell is sequentially divided into a first cavity, a second cavity and a third cavity along the axial direction of the shell; the motor module comprises a rotor which is arranged in the second cavity and is in running fit with the shell; the transmission module is arranged in the first cavity, and the rotating shaft of the rotor drives the input shaft of the transmission module to rotate; the controller module is arranged in the third cavity, and a motor phase line of the motor module stretches into the third cavity and is electrically connected with the controller module. For motor module, derailleur module and controller module components of a whole that can function independently setting, and then need three casings, this electric drive system is with motor module, derailleur module and controller module integration in a casing, and this electric drive system has that the integrated level is high, whole volume is littleer, weight is lighter and manufacturing cost is lower advantage. Meanwhile, in the prior art, the motor phase line and the controller module are required to be electrically connected through the lead-out phase line. In this embodiment, the phase line of the motor is directly led into the third cavity and directly connected with the controller module, and the phase line is omitted, so that the cost is reduced.

Drawings

FIG. 1 is a cross-sectional view of an electric drive system in an embodiment of the present utility model;

FIG. 2 is an exploded view of an electric drive system according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an electric drive system (excluding a third housing) according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a structure of a housing according to an embodiment of the present utility model;

FIG. 5 is a schematic illustration of the configuration of an electric drive system (excluding the transmission module and the first housing) in an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a controller module according to an embodiment of the utility model;

fig. 7 is a schematic structural diagram of a second circuit board according to an embodiment of the utility model;

fig. 8 is a schematic diagram of a second structure of the controller module according to an embodiment of the utility model.

In the figure:

11. a first housing; 111. a first cavity; 112. a first annular projection; 12. a second housing; 121. a second cavity; 13. a third housing; 131. a third cavity; 132. a second annular projection;

2. a motor module; 21. a rotor; 211. a rotating shaft; 22. a motor phase line;

3. a transmission module; 31. an input shaft; 32. a driving wheel; 33. a multi-speed transmission assembly; 34. a differential;

4. a controller module; 41. a controller assembly; 411. a first circuit board; 412. a second circuit board; 42. an encoder; 421. a magnetic ring; 422. a monitoring ring;

5. a heat dissipation module; 51. a cover body; 52. and a fan.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 8, the present embodiment provides an electric drive system including a housing, a motor module 2, a transmission module 3, and a controller module 4, the housing being divided into a first cavity 111, a second cavity 121, and a third cavity 131 in this order along the axial direction thereof; the motor module 2 comprises a rotor 21, and the rotor 21 is arranged in the second cavity 121 and is in rotating fit with the shell; the transmission module 3 is disposed in the first cavity 111, and the rotation shaft 211 of the rotor 21 drives the input shaft 31 of the transmission module 3 to rotate; the controller module 4 is disposed in the third cavity 131, and the motor phase line 22 of the motor module 2 extends into the third cavity 131 and is electrically connected with the controller module 4. For the split arrangement of the motor module 2, the transmission module 3 and the controller module 4, and thus three housings are needed, the motor module 2, the transmission module 3 and the controller module 4 are integrated in one housing, and the electric drive system has the advantages of high integration level, smaller overall size, lighter weight and lower production cost. Meanwhile, in the prior art, the motor phase line 22 and the controller module 4 need to be electrically connected through an outgoing phase line. In the present embodiment, the motor phase line 22 is directly led into the third cavity 131 and directly connected with the controller module 4, and the lead-out phase line is omitted, thereby reducing the cost.

Optionally, the casing includes a first casing 11, a second casing 12 and a third casing 13, the second casing 12 is provided with a first opening and a second opening along its axial direction, the first casing 11 is fixedly connected with the second casing 12 and seals the first opening, the third casing 13 is fixedly connected with the second casing 12 and seals the second opening, the first cavity 111 is arranged in the first casing 11, the third cavity 131 is arranged in the third casing 13, and the first casing 11, the second casing 12 and the third casing 13 enclose into the second cavity 121. In this embodiment, the first casing 11, the second casing 12 and the third casing 13 are fixedly connected in sequence, so that a cover plate for closing the first opening and the second opening is omitted, and the overall weight of the casing is further reduced.

Specifically, the first housing 11 and the second housing 12 are connected by bolts, and the second housing 12 and the third housing 13 are connected by bolts. In other embodiments, the first housing 11 and the second housing 12 may be fixed by clamping or welding, and the second housing 12 and the third housing 13 may be fixed by clamping or welding.

Optionally, the motor module 2 further comprises a stator and two motor bearings, the stator is fixed on the inner wall of the second housing 12 and is collinear with the axis of the housing, and the rotor 21 is inserted in the stator and is coaxial with the stator. Two motor bearings are located in the second cavity 121 and sleeved on the rotating shaft 211, an outer ring of one motor bearing is fixedly arranged on the first shell 11, and an outer ring of the other motor bearing is fixedly arranged on the third shell 13.

Optionally, a first annular protrusion 112 is convexly arranged at a position of the first shell 11 opposite to the first opening, and when the first shell 11 is fixedly connected with the second shell 12, the first annular protrusion 112 is inserted into the second shell 12 through the first opening and is abutted against the inner wall of the second shell 12; the second annular protrusion 132 is protruding at the position of the third casing 13 opposite to the second opening, and when the third casing 13 is fixedly connected with the second casing 12, the second annular protrusion 132 is inserted into the second casing 12 through the second opening and is abutted against the inner wall of the second casing 12. In this embodiment, the first annular protrusion 112 and the second annular protrusion 132 can improve the sealing performance between the second housing 12 and the first housing 11 and the third housing 13, respectively, so as to prevent external moisture and dust from entering the second cavity 121.

Alternatively, the rotation shaft 211 is inserted into the input shaft 31 along the axial direction of the rotation shaft 211. In this embodiment, the shaft 211 is concavely provided with a blind insertion hole along its axial direction, and the input shaft 31 is inserted into the blind insertion hole and is in interference fit with the wall of the blind insertion hole. In other embodiments, the hole wall of the plugging blind hole is provided with a groove along the axial direction thereof, the input shaft 31 is provided with a clamping protrusion along the axial direction thereof, and the clamping protrusion is clamped with the groove when the input shaft 31 is plugged into the plugging blind hole. In other embodiments, the plugging blind hole may be a non-circular blind hole, and the plugging portion of the input shaft 31 is matched with the plugging blind hole. In addition, the rotation shaft 211 is optionally integrally formed with the input shaft 31 in the axial direction of the rotation shaft 211.

Optionally, the rotating shaft 211 extends from the first cavity 111 to the second cavity 121; the controller module 4 comprises a controller assembly 41 and an encoder 42, the encoder 42 comprises a magnetic ring 421 and a monitoring ring 422, the magnetic ring 421 is sleeved on the rotating shaft 211 and fixedly connected with the rotating shaft 211, the monitoring ring 422 is fixedly arranged on the controller module 4 and sleeved on the magnetic ring 421, and the monitoring ring 422 is electrically connected with the controller assembly 41. In this embodiment, the magnetic encoder 42 is used as the position sensor, so that the control accuracy is higher, the reliability is strong, and the motor performance is better than that of the conventional hall type position sensor. The monitoring ring 422 is directly integrated on the controller assembly 41, shares a topology structure, reduces the use of electronic devices, and eliminates the outgoing lines and connectors from the monitoring ring 422 to the controller assembly 41, thereby reducing the cost.

As shown in fig. 6 and 7, the controller assembly 41 may alternatively include a first circuit board 411 and a second circuit board 412 disposed at intervals; the rotating shaft 211 passes through the first circuit board 411 and is opposite to the second circuit board 412, and the monitoring ring 422 is fixedly arranged on the second circuit board 412. In this embodiment, the first circuit board 411 is spaced from the third housing 13, and the first circuit board 411 and the second circuit board 412 are spaced from each other, which is beneficial to heat dissipation between the first circuit board 411 and the second circuit board 412. On the other hand, electrical components are disposed between the first circuit board 411 and the second circuit board 412. The first circuit board 411 is provided with a through hole, the rotating shaft 211 passes through the through hole and is opposite to the second circuit board 412, and the monitoring ring 422 is electrically connected with the second circuit board 412.

In other embodiments, as shown in fig. 8, the monitoring ring 422 is fixed to the inner wall of the third cavity 131. In this embodiment, the first circuit board 411 and the second circuit board 412 are both provided with through holes, the rotating shaft 211 passes through the through holes and is opposite to the third cavity 131, and the monitoring ring 422 is fixedly arranged in the third cavity 131 and is sleeved on the magnetic ring 421 on the rotating shaft 211.

Optionally, the transmission module 3 further includes a driving wheel 32, a multi-stage transmission assembly 33 and a differential mechanism 34, the driving wheel 32 is sleeved on the input shaft 31 and is fixedly connected with the input shaft 31, the driving wheel 32 is in transmission connection with the multi-stage transmission assembly 33, the differential mechanism 34 is in running fit with the transmission housing, and the multi-stage transmission assembly 33 drives the differential mechanism 34 to rotate around the axis of the differential mechanism 34. In this embodiment, the driving wheel 32 is a helical gear, the multi-stage transmission assembly 33 is a gear assembly, and the driving wheel 32 is meshed with the first-stage helical gear of the multi-stage transmission assembly 33. Two half shafts are fixedly connected to the two output ends of the differential 34 respectively, and the two half shafts are connected with wheels. The electric drive system using the speed change mechanism can be applied to three-wheeled electric vehicles or four-wheeled electric vehicles.

Optionally, the transmission module 3 further includes two transmission bearings, where the two transmission bearings are both sleeved on the input shaft 31 and located on two sides of the driving wheel 32, and outer rings of the two transmission bearings are respectively fixedly connected with the first housing 11. In this embodiment, the two transmission bearings and the input shaft 31 form a simple beam structure, which is further beneficial to the stability of rotation of the input shaft 31.

Optionally, the electric driving system further includes a heat dissipation module 5, the heat dissipation module 5 includes a housing 51 and an exhaust fan 52, the rotating shaft 211 passes through the third cavity 131 and is partially located outside the housing, the exhaust fan 52 is fixedly connected with the rotating shaft 211, the housing 51 is fixedly arranged on the housing and encloses with the housing to form a containing cavity, the exhaust fan 52 is located in the containing cavity, and a plurality of exhaust holes arranged in a matrix are arranged in a region of the housing 51 opposite to the exhaust fan 52. In this embodiment, when the controller module 4 works, the controller module 4 generates a large amount of heat to accelerate the dissipation of heat in the third cavity 131, and then the third cavity 131 is provided with the exhaust fan 52, and the exhaust fan 52 rotates under the driving of the rotating shaft 211, so that the heat on the surface of the third housing 13 is rapidly taken away, and then the interior of the third cavity 131 is cooled. The cover 51 prevents the exhaust fan 52 from being harmful to personnel during operation, and also prevents the exhaust fan 52 from being knocked. The exhaust hole on the cover body 51 is used for communicating the accommodating cavity with the outside, so that heat in the accommodating cavity can be rapidly exhausted out of the accommodating cavity.

Optionally, the controller module 4 further includes a controller bearing, where the controller bearing is located in the third cavity 131 and sleeved on the rotating shaft 211, and an outer ring of the controller bearing is fixedly disposed on a side wall of the third housing 13, which is close to the exhaust fan 52. In this embodiment, when the controller bearing can prevent the rotation shaft 211 from rotating, the rotation shaft 211 swings at one end fixedly connected with the exhaust fan 52, so that the stability of the rotation of the exhaust fan 52 is poor, and the rotation shaft 211 collides with the second housing 12.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. An electric drive system, comprising:

the shell is sequentially divided into a first cavity (111), a second cavity (121) and a third cavity (131) along the axial direction of the shell;

the motor module (2) comprises a rotor (21), wherein the rotor (21) is arranged in the second cavity (121) and is in running fit with the shell;

the transmission module (3) is arranged in the first cavity (111), and the rotating shaft (211) of the rotor (21) drives the input shaft (31) of the transmission module (3) to rotate;

the controller module (4) is arranged in the third cavity (131), and a motor phase line (22) of the motor module (2) stretches into the third cavity (131) and is electrically connected with the controller module (4).

2. The electric drive system according to claim 1, characterized in that the housing comprises a first housing (11), a second housing (12) and a third housing (13), the second housing (12) is provided with a first opening and a second opening along its axial direction, the first housing (11) is fixedly connected with the second housing (12) and closes the first opening, the third housing (13) is fixedly connected with the second housing (12) and closes the second opening, the first cavity (111) is provided in the first housing (11), the third cavity (131) is provided in the third housing (13), and the first housing (11), the second housing (12) and the third housing (13) are enclosed to form the second cavity (121).

3. The electric drive system according to claim 2, characterized in that a first annular protrusion (112) is provided protruding from a position of the first housing (11) opposite to the first opening, and when the first housing (11) is fixedly connected with the second housing (12), the first annular protrusion (112) is inserted into the second housing (12) through the first opening and abuts against an inner wall of the second housing (12);

the second annular bulge (132) is arranged at the position, opposite to the second opening, of the third shell (13), and when the third shell (13) is fixedly connected with the second shell (12), the second annular bulge (132) is inserted into the second shell (12) through the second opening and is abutted to the inner wall of the second shell (12).

4. An electric drive system according to claim 1, characterized in that the shaft (211) is plugged into the input shaft (31) in the axial direction of the shaft (211).

5. An electric drive system according to claim 1, characterized in that the shaft (211) is integrally formed with the input shaft (31) in the axial direction of the shaft (211).

6. The electric drive system according to claim 1, characterized in that the spindle (211) extends from the first cavity (111) into the second cavity (121);

the controller module (4) comprises a controller assembly (41) and an encoder (42), the encoder (42) comprises a magnetic ring (421) and a monitoring ring (422), the magnetic ring (421) is sleeved on the rotating shaft (211) and fixedly connected with the rotating shaft (211), the monitoring ring (422) is fixedly arranged on the controller module (4) and sleeved on the magnetic ring (421), and the monitoring ring (422) is electrically connected with the controller assembly (41).

7. The electric drive system of claim 6, wherein the controller assembly (41) includes a first circuit board (411) and a second circuit board (412) disposed at intervals;

the rotating shaft (211) penetrates through the first circuit board (411) and is opposite to the second circuit board (412), and the monitoring ring (422) is fixedly arranged on the second circuit board (412).

8. The electric drive system of claim 6, wherein the monitoring ring (422) is fixedly arranged on an inner wall of the third cavity (131).

9. The electric drive system of claim 1, wherein the transmission module (3) further comprises a driving wheel (32), a multi-stage transmission assembly (33) and a differential (34), the driving wheel (32) is sleeved on the input shaft (31) and fixedly connected with the input shaft (31), the driving wheel (32) is in transmission connection with the multi-stage transmission assembly (33), the differential (34) is in running fit with the transmission shell, and the multi-stage transmission assembly (33) drives the differential (34) to rotate around the axis of the differential (34).

10. The electric drive system according to any one of claims 1-9, further comprising a heat dissipation module (5), wherein the heat dissipation module (5) comprises a cover body (51) and an exhaust fan (52), the rotating shaft (211) penetrates through the third cavity (131) and is partially located outside the housing, the exhaust fan (52) is fixedly connected with the rotating shaft (211), the cover body (51) is fixedly arranged in the housing and surrounds the housing to form a containing cavity, the exhaust fan (52) is located in the containing cavity, and a plurality of exhaust holes which are arranged in a matrix are formed in an area, opposite to the exhaust fan (52), of the cover body (51).