CN216121997U

CN216121997U - Double-motor shell assembly

Info

Publication number: CN216121997U
Application number: CN202121643959.9U
Authority: CN
Inventors: 马学良; 何丽娜; 李义兵; 李怏
Original assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Current assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-03-22
Anticipated expiration: 2031-07-19

Abstract

The utility model provides a double-motor shell assembly which comprises a shell and a rear end cover, wherein a generator junction box and a driving motor junction box which are adjacently arranged are arranged on the rear end cover, and openings are formed in the tops of the generator junction box and the driving motor junction box; the side part of the generator junction box is connected with the shell through a generator side connecting structure; the side part of the drive motor junction box is connected with the shell through a drive motor side connecting structure. According to the double-motor shell assembly, the side part of the generator junction box is connected with the shell through the generator side connecting structure, and the side part of the driving motor junction box is connected with the shell through the driving motor side connecting structure, so that the dynamic stiffness of the generator junction box and the driving motor junction box at middle and high frequencies can be improved, the axial torsional oscillation mode of the generator junction box and the driving motor junction box can be effectively inhibited, and the overall dynamic stiffness performance of the rear end cover can be effectively improved.

Description

Double-motor shell assembly

Technical Field

The utility model relates to the technical field of motors, in particular to a double-motor shell assembly.

Background

With the continuous development of new energy vehicles, the performance requirements on NVH (english abbreviation of Noise, Vibration, Harshness) of the new energy vehicles are higher, and the Noise of the motor serving as an important component of the new energy vehicles mainly comes from the Vibration of the stator core and the shell. The electromagnetic wave excites the stator core to generate vibration, the vibration is transmitted to the shell through the motor stator, the rotating shaft and the like, and the vibration of the shell directly radiates noise.

Because the single motor is simple in structure, the NVH performance of the single motor is improved by increasing a plurality of groups of triangular reinforcing ribs at the position, close to the circle center of the bearing, of the inner side of the rear end cover. For the double motors with the driving motor and the generator, the structure is complex, the size is large, the junction box of the double motors is generally placed on the rear end cover and integrally formed with the rear end cover, and at present, a better structure is not provided for improving the NVH performance of the shell of the double motors.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a dual motor housing assembly, which can effectively improve the dynamic stiffness of the junction box of the generator and the junction box of the driving motor, so as to effectively improve the dynamic stiffness of the dual motor housing assembly.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a double-motor shell assembly comprises a shell and a rear end cover; wherein:

the shell is internally provided with an installation space for installing a generator and a driving motor;

two shaft holes communicated with the mounting space are formed in the shell, the two shaft holes face to the same side of the shell, and the axes of the two shaft holes are arranged in parallel;

the rear end cover is provided with a generator junction box and a driving motor junction box which are adjacently arranged; openings are formed in the tops of the generator junction box and the driving motor junction box; and the number of the first and second groups,

the side part of the generator junction box is connected with the shell through a generator side connecting structure;

the side part of the drive motor junction box is connected with the shell through a drive motor side connecting structure.

Further, the generator side connecting structure has a generator connecting member and a housing connecting member connected to each other; a generator connecting surface is formed on the generator connecting piece, and a generator side connecting hole is formed on the generator connecting surface; the shell connecting piece is provided with a shell connecting surface used for being connected with the shell, and a first shell connecting hole is formed in the shell connecting surface.

Further, the generator connecting member is formed with a plurality of the generator connecting faces; at least one of said generator connection faces is non-coplanar with other of said generator connection faces.

Further, the shell connecting pieces are connected with the generator connecting pieces in a plurality.

Further, a generator connecting table which is abutted with the generator connecting piece is formed on the generator junction box; and/or a shell connecting table which is abutted to the shell connecting piece is formed on the shell.

Furthermore, a reinforcing rib is connected between the generator connecting piece and the shell connecting piece.

Further, the driving motor side connecting structure comprises a first connecting frame and a second connecting frame which are arranged at intervals.

Furthermore, the first connecting frame is in a step shape and is provided with a first connecting body and a second connecting body which are arranged in a staggered mode; and the first connecting body is used for being connected with the driving motor junction box, and the second connecting body is used for being connected with the shell.

Further, the first connecting body and the second connecting body are orthogonally arranged.

Furthermore, the second connecting frame is L-shaped and is provided with a driving motor connecting end and a shell connecting end; a driving motor side connecting hole used for being connected with the driving motor junction box is formed in the connecting end of the driving motor; and a second shell connecting hole used for being connected with the shell is formed in the shell connecting end.

Compared with the prior art, the utility model has the following advantages:

according to the double-motor shell assembly, the side part of the generator junction box is connected with the shell through the generator side connecting structure, and the side part of the driving motor junction box is connected with the shell through the driving motor side connecting structure, so that the dynamic stiffness of the generator junction box and the driving motor junction box at middle and high frequencies can be improved, the axial torsional pendulum mode of the generator junction box and the driving motor junction box can be effectively inhibited, the overall dynamic stiffness performance of the rear end cover can be effectively improved, and the problem of high noise caused by the axial torsional pendulum mode and high-order noise resonance of a motor can be improved.

In addition, a plurality of generator connecting surfaces are arranged on the generator connecting piece, and at least one generator connecting surface is arranged out of the same plane with other generator connecting surfaces, so that the dynamic rigidity of the generator junction box can be further improved. The generator connecting box is connected with the generator connecting piece conveniently by arranging the generator connecting table connected with the generator connecting piece; and the shell connecting table is arranged to facilitate the connection between the shell and the shell connecting piece. The reinforcing ribs are connected between the generator connecting piece and the shell connecting piece, so that the structural strength of the generator side connecting structure can be further improved, and the dynamic rigidity of the generator junction box can be further improved.

In addition, the first connecting frame is designed into a step shape, so that the first connecting frame has better structural performance, and the dynamic rigidity of the position of the junction box of the driving motor can be improved. The second connecting frame is designed into an L shape, so that the processing and the manufacturing are convenient, and the second connecting frame also has better structural performance, thereby improving the dynamic rigidity of the position of the junction box of the driving motor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a dual-motor housing assembly according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a dual-motor housing assembly according to an embodiment of the present invention from another perspective;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is an enlarged view of portion B of FIG. 2;

fig. 5 is a schematic structural diagram of a generator-side connection structure according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a generator-side connection structure according to another view angle in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a generator-side connection structure according to another view angle in the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a first connecting frame according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of the first connecting frame according to another view of the embodiment of the utility model;

FIG. 10 is a schematic structural diagram of a second connecting frame according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a second connecting frame according to another view angle in the embodiment of the present invention.

Description of reference numerals:

1. a housing;

2. a rear end cap; 201. a generator junction box; 202. a drive motor junction box;

3. a generator side connection structure; 301. a generator connector; 3011. a generator connection face; 302. a housing connector; 303. reinforcing ribs;

4. a first connecting frame; 401. a first connecting body; 4011. a first connection hole; 402. a second connector; 4021. a second connection hole;

5. a second link frame; 501. a driving motor connecting end; 502. a housing connection end;

6. a generator connection station; 7. a housing connection station; 8. a first connection block; 9. a second connecting block; 10. a housing connecting column; 11. and a nut.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model relates to a double-motor shell assembly, which comprises a shell 1 and a rear end cover 2, as shown in figures 1 and 2. Wherein, the casing 1 is provided with an installation space for installing a generator and a driving motor, two shaft holes communicated with the installation space are formed on the casing 1, the two shaft holes face to the same side of the casing 1, and the axes of the two shaft holes are arranged in parallel.

Generally, the installation space includes a generator installation cavity and a driving motor installation cavity, and the two shaft holes are respectively communicated with the generator installation cavity and the driving motor installation cavity and used for allowing the output shaft of the generator and the output shaft of the driving motor to penetrate out. In addition, other structures of the housing 1 can be made according to the prior art.

As shown in fig. 3 and 4, a generator terminal box 201 and a drive motor terminal box 202 are adjacently arranged on the rear end cover 2, and openings are formed at the tops of the generator terminal box 201 and the drive motor terminal box 202. In order to improve the overall rigidity of the dual-motor housing assembly, the generator junction box 201 and the driving motor junction box 202 of the present embodiment are integrally formed with the rear end cover 2.

The side portion of the generator terminal box 201 is connected to the housing 1 via the generator-side connection structure 3, and the side portion of the drive motor terminal box 202 is connected to the housing 1 via the drive motor-side connection structure. Specifically, as a specific embodiment, as shown in fig. 5, 6, and 7 in combination with fig. 2, the generator-side connection structure 3 is a strip shape arranged in the longitudinal direction of the generator junction box 201 as a whole (i.e., the left-right direction in the state of fig. 2), and may be made of stainless steel having a thickness of 7 mm. Of course, the material and thickness of the generator-side connection structure 3 can be flexibly adjusted according to design requirements.

In addition, in order to effectively increase the dynamic stiffness of the generator junction box 201, especially the dynamic stiffness of the medium and high frequencies, the generator-side connection structure 3 has a generator connection 301 and a housing 1 connection connected to each other. Further, a generator connection surface 3011 is formed on the generator connector 301, and a generator side connection hole is formed on the generator connection surface 3011.

In this embodiment, for convenience of design and implementation, as a specific implementation manner, the generator connection surfaces 3011 are respectively arranged orthogonal to the housing connection surfaces. In order to further improve the use effect, as shown in fig. 7, a plurality of generator connection surfaces 3011 are formed on the generator connection member 301, and at least one generator connection surface 3011 is not coplanar with other generator connection surfaces 3011, so that the dynamic stiffness of the position of the generator junction box 201 can be further improved. It should be noted that the generator connection surfaces 3011 of the present embodiment may be five as shown in fig. 5, or may be changed into four, six, and the like according to design requirements. In addition, the specific number of the generator side connection holes on each generator connection face 3011 may be flexibly arranged according to the size of the generator connection face 3011.

As shown in fig. 3 and 4, in order to facilitate connection of the generator connector 301 to the generator terminal box 201, the generator terminal box 201 is provided with a plurality of generator connection bases 6 which are in contact with the generator connector 301, and the plurality of generator connection bases 6 are provided in one-to-one correspondence with the respective generator-side connection holes. For convenience of manufacture, the generator connecting platform 6 of the present embodiment is cylindrical and has a threaded hole formed thereon, so that a screw can be screwed into the threaded hole after passing through the generator side connecting hole, thereby realizing connection between the generator connecting piece 301 and the generator junction box 201.

In this embodiment, in order to better improve the dynamic stiffness of the dual-motor housing assembly, the housing connectors 302 of this embodiment are a plurality of connectors connected to the generator connector 301, and a housing connecting surface for connecting to the housing 1 is formed on each housing connector 302, and a first housing connecting hole is formed on the housing connecting surface. As shown in fig. 3 and 4, a case connection base 7 that abuts against each case connector 302 is formed on the case 1, and a screw hole is formed in the case connection base 7 so that the case connector 302 and the case connection base 7 are connected by a bolt. As a specific embodiment, the housing connectors 302 of the present embodiment are three connectors spaced apart along the length direction of the generator junction box 201.

In addition, in order to further improve the structural strength at the generator junction box 201, as shown in fig. 5 and 6, a reinforcing rib 303 is connected between the generator connector 301 and the case connector 302. The reinforcing rib 303 may be provided at one side of the housing connector 302 or may be disposed at both sides of the housing connector 302, respectively, according to design requirements.

As shown in fig. 3 and 4, the driving motor side connecting structure of the present embodiment includes a first connecting frame 4 and a second connecting frame 5 which are arranged at an interval, and the first connecting frame 4 and the second connecting frame 5 are respectively arranged at both ends of the driving motor junction box 202. In addition, in specific implementation, the connecting structure on the driving motor side can be made of stainless steel with the thickness of 7 mm. Of course, the material and thickness of the driving motor side connecting structure can be flexibly adjusted according to design requirements.

As shown in fig. 8 and 9, in order to improve the dynamic stiffness of the position of the drive motor terminal box 202, the first connecting frame 4 of the present embodiment is stepped and has a first connecting body 401 and a second connecting body 402 arranged in a staggered manner. In order to further improve the use effect, the first connecting body 401 and the second connecting body 402 of the present embodiment are orthogonally arranged, and the planar projection of the first connecting frame 4 is made to be L-shaped.

The first connecting body 401 is used to connect with the driving motor terminal box 202, and the second connecting body 402 is used to connect with the housing 1. In order to facilitate the connection of the driving motor junction box 202 with the first connection body 401, as shown in fig. 4, a first connection block 8 is provided at a side portion of the driving motor junction box 202 to be protruded, and two first connection holes 4011 are formed at intervals on the first connection block 8. Meanwhile, as shown in fig. 8 and 9, two through holes provided corresponding to the two via holes are formed on the first connection body 401, and the nut 11 is welded on the first connection body 401 corresponding to the through holes.

In addition, a second connection hole 4021 is formed on the second connection body 402, and a screw hole is formed on the housing 1 corresponding to the second connection hole 4021 to achieve connection between the second connection body 402 and the housing 1 by a screw. In order to improve the connection effect between the second connector 402 and the housing 1, a plane is milled on the housing 1, the threaded hole is configured on the plane, and the second connector 402 is placed on the plane, so that the placement stability of the second connector 402 can be improved, and the dynamic stiffness of the position of the junction box 202 of the driving motor can be further improved.

The second link bracket 5 of the present embodiment has a structure shown in fig. 10 and 11, and is L-shaped as a whole to have a driving motor connection end 501 and a housing connection end 502, and a driving motor side connection hole for connection with the driving motor junction box 202 is formed on the driving motor connection end 501, and at the same time, a second housing connection hole for connection with the housing is formed on the housing connection end 502.

Also, as shown in fig. 3 and 4, a second connection block 9 is formed on the driving motor terminal block 202 corresponding to the driving motor connection terminal 501, and a screw hole is formed on the second connection block 9 to enable connection between the second connection frame 5 and the driving motor terminal block 202 by a screw passing through and screwing with the driving motor side connection hole. In addition, a case connection post 10 is formed on the case 1 corresponding to the case connection end 502, and a screw hole is formed on the case connection post 10 to enable connection between the second connection bracket 5 and the case 1 by a screw passing through the second case connection hole and threadedly coupled with the screw hole.

In the dual-motor housing assembly of the embodiment, the side portion of the generator junction box 201 is connected with the housing 1 through the generator-side connecting structure 3, and the side portion of the driving-motor junction box 202 is connected with the housing 1 through the driving-motor-side connecting structure, so that the dynamic stiffness of the middle and high frequencies at the positions of the generator junction box 201 and the driving-motor junction box 202 can be improved, the axial torsional mode of the generator junction box 201 and the driving-motor junction box 202 can be effectively suppressed, the dynamic stiffness performance of the whole rear end cover 2 can be effectively improved, and the problem of large noise caused by the axial torsional mode and the motor high-order noise resonance can be improved.

The present invention is not limited to the above-described preferred embodiments, but rather, the present invention is to be construed broadly and cover all modifications, equivalents, and improvements falling within the spirit and scope of the present invention.

Claims

1. The utility model provides a bi-motor shell assembly which characterized in that: comprises a shell (1) and a rear end cover (2); wherein:

the shell (1) is internally provided with an installation space for installing a generator and a driving motor;

two shaft holes communicated with the installation space are formed in the shell (1), the two shaft holes face to the same side of the shell (1), and the axes of the two shaft holes are arranged in parallel;

the rear end cover (2) is provided with a generator junction box (201) and a driving motor junction box (202) which are adjacently arranged;

openings are formed at the tops of the generator junction box (201) and the driving motor junction box (202); and the number of the first and second groups,

the side part of the generator junction box (201) is connected with the shell (1) through a generator side connecting structure (3);

the side part of the drive motor junction box (202) is connected with the shell (1) through a drive motor side connecting structure.

2. The dual motor housing assembly of claim 1, wherein:

the generator-side connection structure (3) has a generator connection piece (301) and a housing connection piece (302) which are connected; and the number of the first and second groups,

a generator connecting surface (3011) is formed on the generator connecting piece (301), and a generator side connecting hole is formed on the generator connecting surface (3011);

the shell connecting piece (302) is provided with a shell connecting surface used for being connected with the shell (1), and a first shell connecting hole is formed in the shell connecting surface.

3. The dual motor housing assembly of claim 2, wherein:

the generator connecting piece (301) is formed with a plurality of the generator connecting faces (3011);

at least one of the generator connection surfaces (3011) is not coplanar with the other generator connection surfaces (3011).

4. The dual motor housing assembly of claim 2, wherein:

the shell connecting pieces (302) are connected with the generator connecting pieces (301).

5. The dual motor housing assembly of claim 2, wherein:

a generator connecting table (6) which is abutted with the generator connecting piece (301) is formed on the generator junction box (201); and/or the presence of a gas in the gas,

and a shell connecting table which is abutted against the shell connecting piece (302) is formed on the shell (1).

6. The dual motor housing assembly of claim 2, wherein:

and a reinforcing rib (303) is connected between the generator connecting piece (301) and the shell connecting piece (302).

7. The dual motor housing assembly of any one of claims 1 to 6, wherein:

the driving motor side connecting structure comprises a first connecting frame (4) and a second connecting frame (5) which are arranged at intervals.

8. The dual motor housing assembly of claim 7, wherein:

the first connecting frame (4) is in a step shape and is provided with a first connecting body (401) and a second connecting body (402) which are arranged in a staggered mode; and the number of the first and second groups,

the first connecting body (401) is used for being connected with the driving motor junction box (202);

the second connecting body (402) is used for connecting with the shell (1).

9. The dual motor housing assembly of claim 8, wherein:

the first connecting body (401) and the second connecting body (402) are orthogonally arranged.

10. The dual motor housing assembly of claim 7, wherein:

the second connecting frame (5) is L-shaped and is provided with a driving motor connecting end (501) and a shell connecting end (502);

a driving motor side connecting hole used for being connected with the driving motor junction box (202) is formed in the driving motor connecting end (501);

and a second shell connecting hole for connecting with the shell (1) is formed on the shell connecting end (502).