CN114051354A - Controller and upper cover plate NVH performance optimization structure - Google Patents

Abstract

The invention relates to the field of controllers, and discloses a controller and upper cover optimization structure, which comprises: the groove is formed in the upper surface of the upper cover plate; the mounting areas are all positioned in the grooves, the center of one mounting area is superposed with the center of the upper cover plate, and the width of each mounting area is the same as that of the groove; and the fixing assemblies are respectively positioned in different mounting areas and are connected with the shell of the controller. According to the invention, when the upper cover plate of the controller causes resonance, the vibration amplitude is greatly reduced, the generated radiation noise is reduced, the influence on the NVH performance of the electric drive system can be ignored, and the upper cover plate is effectively protected.

Description

Controller and upper cover plate NVH performance optimization structure

Technical Field

The invention relates to a controller, in particular to an optimized structure of a controller and an upper cover.

Background

As is known, the modal frequency of the thin-wall structure is low, when an electric drive system operates, the modal frequency of the upper cover plate of the controller approaches the electric drive external excitation frequency, which causes the resonance band of the upper cover plate to generate radiation Noise, and has a great influence on the performance of the NVH (Noise, Vibration, Harshness, Vibration and sound Vibration roughness, NVH for short), and the long-time resonance problem causes the resonance fatigue of the controller structure, which further affects the fatigue life of the structure and affects the safe operation of the controller. The upper cover plate of the traditional controller is mostly formed by punching, the structure is simple, the rigidity of the whole structure is low, the mode is low, the order density is dense, and the NVH performance is poor.

The prior art scheme is as follows: the transverse and longitudinal crossed reinforcing ribs in a shape like a Chinese character 'mi' are additionally arranged on the inner side of the upper cover plate of the controller, or the wall thickness is increased, or the height of the reinforcing ribs is increased to improve the mode, but the amplitude of the overall mode improvement is limited, so that the mode requirement of an electric drive system with the trend of higher and higher power density, miniaturization, integration and light weight development is difficult to meet.

Disclosure of Invention

The invention aims to solve the problem that the overall NVH performance of an upper cover plate of a controller is poor in the prior art, and provides an upper cover optimization structure which is provided with a fixed point added at the weak position of the upper cover plate of the controller, so that the modal lifting of the upper cover plate of the controller is obvious, the structural resonance response and the radiation noise are effectively reduced, and the overall NVH performance of electric drive is improved.

In order to achieve the above object, an aspect of the present invention provides an upper cover plate NVH performance optimizing structure of a controller, the optimizing structure including:

the groove is formed in the upper surface of the upper cover plate;

a plurality of mounting areas, all located in the recess;

and the fixing assemblies are respectively positioned in different mounting areas and are connected with the shell of the controller.

Preferably, the fixing assembly comprises:

the adapter stud is arranged inside the shell;

and one end of the bolt is connected with the switching stud, and the other end of the bolt penetrates through the bottom of the groove and abuts against the bottom wall of the groove, so that the upper cover plate is clamped between the switching stud and the bolt.

Preferably, the fixing assembly further comprises:

the annular groove is formed in the upper surface of the adapter stud;

sealing rings: and the sealing ring is positioned in the annular groove, and the height of the sealing ring is greater than the depth of the annular groove, so that the upper cover plate extrudes the sealing ring to enter the annular groove after the upper cover plate is installed.

Preferably, the center of one of the mounting areas coincides with the center of the upper cover plate, and the width of each mounting area is smaller than or equal to the width of the groove.

Preferably, the upper surface of the sealing ring is provided as a convex arc surface.

Preferably, the fixing assembly further comprises:

the thread groove is formed in the upper surface of the adapter stud, and internal threads are arranged in the thread groove;

the external screw thread sets up on the bolt outer lane, with the cooperation of internal thread line, the degree of depth of thread groove is greater than the height of external screw thread to the upper end that makes the bolt closely laminates with the lateral wall of upper cover plate.

Preferably, the adapter stud includes:

the threaded end is positioned at the lower end of the adapter stud and is in threaded connection with the shell;

and the anti-loosening glue is coated on the threaded end.

Preferably, one end of the groove extends to the middle part of the side wall of one side of the upper cover plate and is positioned on the same side with the motor on the controller, and the fixing component is installed at one end of the groove close to the motor.

Preferably, the lower end of the adapter stud is integrally arranged with a boss of the housing.

Preferably, the bolt is a sealant bolt.

The second aspect of the invention provides a controller, which comprises the optimized structure and a controller body.

Through the technical scheme:

through set up fixed subassembly on the upper cover plate, can increase the stability of upper cover plate, like this at the controller during operation, can effectively fix the position of upper cover plate, make it can not acutely rock. Thereby can make the controller upper cover plate arouse when resonating, the range greatly reduced of vibration, and then the radiation noise who produces diminishes, influence can be ignored to electric drive system's NVH performance, thereby effectively protect the upper cover plate, avoid influencing controller safe operation because of structural fatigue, need not to change upper cover plate modal frequency, just can optimize the NVH performance, the life of extension upper cover plate, and need not the thickening, and reduce cost, wholly accord with the miniaturization more, integrate, lightweight development demand.

The weak position of controller upper cover plate increases the fixed point, and the mode promotion of controller upper cover plate is obvious, reduces structure resonance response and radiation noise effectively, improves the whole NVH performance of electric drive.

Drawings

Fig. 1 is a schematic structural diagram of an upper cover plate NVH performance optimization structure of a controller according to the present application;

FIG. 2 is a schematic cross-sectional view of the housing;

fig. 3 is a schematic view of a connection structure of the adapter stud and the bolt.

Description of the reference numerals

1. Controller 2, upper cover plate

3. Groove 4, switching stud

5. Bolt 6 and sealing ring

7. Thread groove 8, thread end

9. Case 10, boss

11. Electric machine

Detailed Description

Fig. 1 is a schematic structural diagram of an upper cover plate NVH performance optimization structure of a controller according to the present application; FIG. 2 is a schematic cross-sectional view of the housing; fig. 3 is a schematic view of a connection structure of the adapter stud and the bolt. An upper cover plate NVH performance optimization structure of a controller may include: controller 1, upper cover plate 2, recess 3, fixed subassembly, casing 9, installation area.

The recess 3 is formed on the upper cover 2, the mounting region is formed in the recess 3, the fixing members are mounted in the mounting region, the mounting region is formed in a rectangular shape, a circle center, an oval shape, etc., a center position of the mounting region coincides with a center position of the upper cover 2 such that a modal lowest point position of the upper cover 2 is located in the mounting region, the fixing members are mounted at modal lowest points, a width of the mounting region is formed to be the same as a width of the recess 3, the number of the fixing members is one or more, and the fixing members are coupled to the housing 9 to fix a position of the upper cover 2, and one fixing member is mounted at a center position of the upper cover 2.

Adapter stud 4 is installed on the lower extreme inner wall of casing 9, and bolt 5 is in the same place with adapter stud 4 connecting thread, and the head of bolt 5 is located recess 3 to the lower lateral wall of bolt 5 head contacts with the diapire of recess 3, so that upper cover plate 2 is compressed tightly between bolt 5 and adapter stud 4, thereby guarantees upper cover plate 2's stability.

The ring channel is located the upper surface of switching double-screw bolt 4, and sealing washer 6 is located the ring channel to sealing washer 6 highly is greater than the degree of depth of ring channel, like this when installing upper cover plate 2, receives the extrusion of upper cover plate 2, can make sealing washer 6 take place deformation, is extruded to get into the ring channel, can enough guarantee sealed effect like this, and sealing washer 6's bounce also can support upper cover plate 2, guarantees its stability.

The upper surface of the sealing ring 6 is arranged to be an outwards convex cambered surface, so that deformation is easier to occur, and when deformation occurs, the contact area between the sealing ring 6 and the upper cover plate 2 is larger.

A screw groove 7 is further provided at the upper end of the adapter stud 4, an internal thread is provided inside the screw groove 7, and an external thread is provided on the surface of the bolt 5, the external thread and the internal thread are in screw engagement, and the depth of the screw groove 7 is greater than the height of the bolt 5, so that the upper cover plate 2 can be effectively fixed when the bolt 5 is screwed into the screw groove 7.

The lower end of the adapter stud 4 is also provided with a threaded end 8 which is in threaded connection with a shell 9, and the threaded end 8 is coated with anti-loosening glue, so that the connection tightness is further improved.

The groove 3 can be set to be a linear type or a curved type, the controller 1 further comprises a motor 11 positioned on one side of the shell 9, one end of the groove 3 extends to the same side as the motor 11 and is positioned in the middle of one side of the upper cover plate 2, thus a mounting area is arranged at one end of the groove 3, and the fixing component is positioned in the mounting area, so that the vibration caused by the motor 11 during operation is reduced to the maximum extent, and the safety of the upper cover plate 2 is protected more effectively.

The adapter stud 4 may be integrally connected to the housing 9, or the boss 10 on the housing 9 may be directly used to replace the connection between the adapter stud 4 and the bolt 5, which has the same effect.

The sealing structure of the sealing ring 6 can be replaced by a bolt 5 with a sealing glue, or a bolt 5 with a sealing ring, or a mechanical sealing (interference connection) structure.

A controller 1 comprises the optimization structure and a controller 1 body.

The weak position of 2 upper cover plates of controller 1 increases the fixed point, and 2 mode promotion on 2 upper cover plates of controller 1 are obvious, reduce structure resonance response and radiation noise effectively, improve the whole NVH performance of electric drive.

Through set up fixed subassembly on upper cover plate 2, can increase upper cover plate 2's stability, like this at controller 1 during operation, can effectively fix upper cover plate 2's position, make it can not acutely rock. Thereby can make 1 upper cover plate of controller 2 arouse when resonating, the range greatly reduced of vibration, and then the radiation noise who produces diminishes, influence can be ignored to electric drive system's NVH performance, thereby effectively protect upper cover plate 2, avoid influencing 1 safe operation of controller because of structural fatigue, need not to change 2 modal frequencies of upper cover plate, just can optimize the NVH performance, prolong upper cover plate 2's life, and need not the thickening, and reduce cost, wholly accord with the miniaturization more, integrate, lightweight development demand.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (10)

1. An upper cover plate NVH performance optimization structure of a controller, characterized in that, the optimization structure includes:

the groove (3) is arranged on the upper surface of the upper cover plate (2);

a plurality of mounting areas, all located in the recess (3);

and a plurality of fixing components which are respectively positioned in different mounting areas and are connected with the shell (9) of the controller (1).

2. The optimization structure of claim 1, wherein the securing assembly comprises:

the adapter stud (4) is installed inside the shell (9);

and one end of the bolt (5) is connected with the adapter stud (4), and the other end of the bolt penetrates through the bottom of the groove (3) and is abutted against the bottom wall of the groove (3), so that the upper cover plate (2) is clamped between the adapter stud (4) and the bolt (5).

3. The optimization structure of claim 2, wherein the fixation assembly further comprises:

the annular groove is formed in the upper surface of the adapter stud (4);

sealing ring (6): and the sealing ring is positioned in the annular groove, and the height of the sealing ring (6) is greater than the depth of the annular groove, so that the sealing ring (6) is extruded into the annular groove by the upper cover plate (2) after the upper cover plate (2) is installed.

4. The optimization structure according to claim 2, characterized in that the center of one of the mounting areas coincides with the center of the upper cover plate (2), and the width of each mounting area is less than or equal to the width of the groove (3).

5. The optimization structure of claim 2, wherein the fixation assembly further comprises:

the thread groove (7) is formed in the upper surface of the adapter stud (4), and internal threads are arranged in the thread groove (7);

the external screw thread sets up on bolt (5) outer lane, with the cooperation of internal thread line, the degree of depth of thread groove (7) is greater than the height of external screw thread to the upper end that makes bolt (5) closely laminates with the lateral wall of upper cover plate (2).

6. The optimization structure according to claim 5, characterized in that the adapter stud (4) comprises:

the threaded end (8) is positioned at the lower end of the adapter stud (4) and is in threaded connection with the shell (9);

and the anti-loosening glue is coated on the threaded end (8).

7. The optimization structure of claim 1, characterized in that one end of the groove (3) extends to the middle of the side wall of one side of the upper cover plate (2) and is positioned at the same side with the motor (11) on the controller (1), and the installation area is positioned at one end of the groove (3) close to the motor (11).

8. The optimization structure according to claim 5, characterized in that the lower end of the adapter stud (4) is arranged integrally with a boss (10) of the housing (9).

9. The optimized structure according to claim 2, characterized in that said bolts (5) are sealant bolts (5).

10. A controller, characterized by comprising the optimization structure of any one of claims 1-9 and a controller (1) body.

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