Cover plate structure for improving NVH of motor controller

Abstract

The utility model discloses a cover plate structure for improving the NVH of a motor controller, which comprises a cover plate body, the outer ring of the cover plate body is provided with an edge strip, the edge strip is provided with spacing holes corresponding to mounting holes in the outer side of the motor controller, and the surface of the cover plate body is integrally provided with a plurality of convex frames; the convex frame comprises a first convex strip and a second convex strip which are arranged in a crossed mode, and the included angle between the first convex strip and the length direction of the cover plate body and the included angle between the second convex strip and the length direction of the cover plate body are acute included angles. The cover plate has the beneficial effects that the first protruding strips and the second protruding strips form a triangular supporting structure with the edge of the cover plate body after being formed, the damping effect of the cover plate body is improved, the deformation condition of the middle of the cover plate body can be reduced, the energy dissipation capacity of materials in the vibration process is improved, the vibration amplitude within the high-frequency range is reduced, and the service life of the cover plate is prolonged. And the NVH effect of the cover plate is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle, concretely relates to a cover plate structure for improving motor controller NVH. BACKGROUND

[0002] The motor controller in the new energy automobile is the key component to realize power transmission and control, and the cover plate as its shell design bears important functions. The natural frequency is crucial in the design of the motor controller, because it directly affects the vibration characteristics and stability of the system. Higher natural frequency can effectively reduce the risk of resonance under dynamic load, and proper design of the natural frequency can prevent unnecessary vibration under the influence of high-frequency switching and transient load of the motor, thereby reducing the heat loss and noise of the motor controller. The cover plate design of the new energy automobile motor controller must consider the natural frequency to realize efficient and stable power control and promote the performance improvement and reliability guarantee of the electric vehicle.

[0003] The Chinese patent with publication number CN116614980A discloses a motor controller upper cover plate structure, which comprises: an upper cover plate body; and a mute plate arranged on the top of the upper cover plate body, wherein the mute plate is configured as a three-layer thin plate structure, and the damping coefficient of the middle layer material is greater than that of the outer layer material.

[0004] In the above patent document, the resonance of the upper cover plate body is mainly suppressed by adding a mute plate on the top surface of the upper cover plate body, but in actual work, since the mute plate is connected to the upper cover plate body mainly by adhesion or riveting or screwing, when the upper cover plate body is subjected to vibration, the connection position of the mute plate is also prone to loosening and causing vibration, and in severe cases, mutual beating may occur between the mute plate and the upper cover plate body, which can also cause deformation of the upper cover plate body.

[0005] Therefore, it is a problem worth studying to provide a cover plate structure for improving the NVH of a motor controller. SUMMARY

[0006] In order to solve the above-mentioned problems existing in the prior art, the purpose of the utility model is to effectively improve the NVH effect of the cover plate.

[0007] The purpose of the utility model is achieved in that:

[0008] The utility model provides a kind of cover plate structure for improving motor controller NVH, including cover plate body, the outer ring of cover plate body is equipped with batten, spacing hole corresponding with the mounting hole of motor controller outside is equipped on the batten, a plurality of convex frames are integrally arranged on the surface of cover plate body, and the inner wall of the convex frame corresponding with motor controller is away from the motor controller setting;

[0009] The convex frame includes a first protruding strip and a second protruding strip arranged in a cross shape, and the included angle between the first protruding strip and the second protruding strip and the length direction of the cover plate body is an acute angle.

[0010] Further, the first protruding strip and the second protruding strip on the adjacent two convex frames are connected by an arc-shaped protruding strip.

[0011] Further, the cover plate body and the convex frame are made of aluminum alloy, and the convex frame and the batten are stamped.

[0012] Further, the first protruding strip and the second protruding strip are connected by a circular arc transition between the first protruding strip and the second protruding strip and the cover plate body.

[0013] Further, the width of the first protruding strip and the second protruding strip is greater than four times the thickness of the cover plate body.

[0014] Further, the first protruding strip or the second protruding strip is not less than 1.5 times the thickness of the cover plate body from the edge of the cover plate body.

[0015] Further, the inner wall of the cover plate body is provided with an inner lining layer, and the surface of the inner lining layer is provided with a mesh.

[0016] Positive beneficial effects:

[0017] The first protruding strip and the second protruding strip form a triangular support structure after forming from the edge of the cover plate body, which not only improves the shock absorption effect of the cover plate body, but also reduces the deformation of the middle part of the cover plate body, improves the energy dissipation capacity of the material in the vibration process, reduces the vibration amplitude in the high frequency range, and the overall structure of the device is simple, without complex process, compared with the cover plate mode of the conventional scheme, effectively improves the NVH effect of the cover plate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram;

[0019] Figure 2 The utility model is a structural schematic diagram of the second embodiment;

[0020] As shown in the figure: cover plate body 1, spacing hole 101, edge 102, convex frame 2, first convex strip 201, second convex strip 202; DETAILED DESCRIPTION

[0021] The utility model is further described below in combination with the drawings and examples.

[0022] First embodiment:

[0023] Referring to Figure 1 As shown in the figure, the utility model provides a cover plate structure for improving motor controller NVH, including cover plate body 1, the outer ring of cover plate body 1 is equipped with edge 102, and edge 102 is located at the outer ring edge position of cover plate body 1, preferably, edge 102 is distributed in ladder shape with cover plate body 1, and cover plate body 1 is located at the upper layer position of ladder, a plurality of spacing holes 101 are formed on the surface of edge 102, and spacing hole 101 corresponds to the mounting hole on the outside of motor controller;

[0024] The surface of cover plate body 1 is integrally equipped with a plurality of convex frames 2, and the inner wall of the corresponding convex frame 2 of motor controller is away from motor controller, that is, convex frame 2 is in ladder shape with cover plate body 1, and the inner wall of cover plate body 1 is closer to motor controller compared with the inner wall of convex frame 2, and a plurality of convex frames 2 are uniformly distributed along the length direction of cover plate body 1.

[0025] In the structure of convex frame 2, convex frame 2 includes first convex strip 201 and second convex strip 202 arranged in cross, and the included angle between first convex strip 201 and second convex strip 202 and the length direction of cover plate body 1 is an acute angle, that is, first convex strip 201 and second convex strip 202 constitute the support structure of "X" shape, since first convex strip 201 and second convex strip 202 are arranged in cross, and first convex strip 201 and second convex strip 202 have an included angle with the length direction of cover plate body 1, then first convex strip 201 and second convex strip 202 and the edge of cover plate body 1 present a triangular plate structure, forming a stable support structure, which helps to improve the anti-seismic performance of the structure.

[0026] First convex strip 201 and second convex strip 202 increase the rigidity of cover plate body 1 through concave-convex structure, reduce the deformation in the middle of cover plate body 1, thereby increasing the damping effect of cover plate body 1, improving the energy dissipation capacity of material in the vibration process, reducing the vibration amplitude in the high frequency range, thereby increasing the natural frequency.

[0027] Further, first convex strip 201 and second convex strip 202 are wide convex strips, thereby effectively limiting the deformation of cover plate body 1 under stress, further enhancing the bending resistance and torsional resistance of cover plate body 1, thereby improving the natural frequency.

[0028] The cover plate body 1 and the convex frame 2 are made of aluminum alloy, and the convex frame 2 and the edge strip 102 are stamped and formed, the upward convex convex frame 2 can make the overall gravity center of the cover plate body 1 move in a small range, and the convex frame 2 and the cover plate body 1 are in different planes, when the motor controller works, the resonance of the cover plate body 1 and the convex frame 2 is reduced, the resonance of a certain frequency can be avoided, so as to enhance the stability and safety of the structure.

[0029] The second embodiment is different from the first embodiment in that:

[0030] Referring to Figure 2 The arc-shaped convex strip between the first convex strip 201 and the second convex strip 202 on the adjacent two convex frames 2 is communicated, that is, the common combination of the first convex strip 201 and the second convex strip 202 makes the convex frame 2 form a continuous structure composed of “W” and “M” facing each other. The structure of the present application is simple, novel in design, without complex process, no new material and no new part. The cover plate structure meets the forming process condition. Compared with the conventional cover plate mode, the natural frequency of the cover plate is obviously improved.

[0031] The third embodiment is different from the first embodiment in that:

[0032] In the stamping and forming of the convex frame 2, the first convex strip 201 and the second convex strip 202 are circularly transitioned at the position where they intersect and contact each other, and the first convex strip 201 and the cover plate body 1, and the second convex strip 202 and the cover plate body 1 are circularly transitioned at the contact positions. The circular transition can assist the forming of the first convex strip 201 and the second convex strip 202, improve the forming effect of the convex frame 2, and the convex frame 2 is arranged on the surface of the cover plate body 1 in a uniform distribution manner, so that a triangular plate structure is formed between the convex frame 2 and the edge of the cover plate body 1, which has good support and stability.

[0033] In the preferred embodiment, the width of the first convex strip 201 and the second convex strip 202 is greater than four times the thickness of the cover plate body 1. At this time, the groove can enhance the rigidity of the overall structure of the cover plate body 1, so that the wider first convex strip 201 and the second convex strip 202 can increase the bending stiffness of the cover plate body 1, thereby allowing more complex modal to be formed, which helps to reduce the vibration response at certain frequencies.

[0034] And the first convex strip 201 or the second convex strip 202 is not less than 5 times the thickness of the cover plate body 1 from the edge position of the cover plate body 1, so that the distance between the first convex strip 201 and the edge position of the cover plate body 1 and the distance between the second convex strip 202 and the edge position of the cover plate body 1 are both greater than 5 times the distance, which can reduce the stress concentration at the edge position of the first convex strip 201 and the second convex strip 202, effectively reduce the local deformation caused by external load or impact, and reduce the reflection of sound waves in the structure, improve the acoustic characteristics, and help improve the sound insulation effect and the strength and sound insulation effect of the cover plate.

[0035] The inner wall of the cover plate body 1 is provided with an inner lining layer, and the surface of the inner lining layer is provided with a mesh hole. The inner lining layer plays a supporting and buffering and damping role. The inner lining layer can be fixedly connected with the cover plate body 1 by a mesh structure mold spraying mode. The inner lining layer is in a matched state with the cover plate body 1 and the convex frame 2, and the mesh hole on the inner lining layer plays a damping and vibration isolation role. When the cover plate body 1 is installed through the edge strip 102, the inner lining layer can also play a buffering role, improve the tightness of the connection between the cover plate body 1 and the motor controller, and thus can block the propagation of sound waves and achieve a buffering effect.

[0036] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cover plate structure for improving the NVH of a motor controller, comprising a cover plate body (1), wherein the cover plate body (1) is provided with a side strip (102) on its outer ring, and the side strip (102) is provided with spacer holes (101) corresponding to the mounting holes on the outside of the motor controller, characterized in that: The cover plate body (1) is integrally provided with a plurality of convex brackets (2), and the inner wall of the convex brackets (2) corresponding to the motor controller is set away from the motor controller; The convex frame (2) includes a first convex strip (201) and a second convex strip (202) arranged in a cross configuration. The angles between the first convex strip (201) and the second convex strip (202) and the length direction of the cover plate body (1) are both acute angles.

2. The cover plate structure for improving NVH of a motor controller according to claim 1, characterized in that: The first convex strip (201) and the second convex strip (202) on two adjacent convex frames (2) are connected by an arc-shaped convex strip.

3. A cover plate structure for improving NVH of a motor controller according to claim 1 or 2, characterized in that: The cover plate body (1) and the convex frame (2) are made of aluminum alloy, and the convex frame (2) and the edge strip (102) are stamped.

4. The cover plate structure for improving NVH of a motor controller according to claim 3, characterized in that: The first protrusion (201) and the second protrusion (202) are connected to the cover plate body (1) by a circular arc transition.

5. The cover plate structure for improving NVH of a motor controller according to claim 3, characterized in that: The width of the first protrusion (201) and the second protrusion (202) is more than four times the thickness of the cover plate body (1).

6. The cover plate structure for improving NVH of a motor controller according to claim 3, characterized in that: The first protrusion (201) or the second protrusion (202) is located at an edge position of the cover plate body (1) that is not less than 1.5 times the thickness of the cover plate body (1).

7. The cover plate structure for improving NVH of a motor controller according to claim 3, characterized in that: The inner wall of the cover plate body (1) is provided with an inner lining layer, and the surface of the inner lining layer is provided with mesh.

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