Vehicle

Abstract

The invention relates to a vehicle which comprises a dual-motor structure, the dual-motor structure comprises two motors (1) connected together, each motor (1) comprises at least two cover plates (11), and the plurality of cover plates (11) of the two motors (1) comprise two cover plates (11) with different inherent frequencies; the plurality of cover plates comprise two cover plates which belong to one motor and have different inherent frequencies; the difference value of the inherent frequencies of the two cover plates with different inherent frequencies is larger than or equal to 90 Hz to 110 Hz. The dual-motor structure of the vehicle can solve the technical problem that noise is large when the dual-motor structure works.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular, to a vehicle. Background Art

[0002] With the electrification of vehicles, the vehicle's power system has undergone a major change, switching from the original internal combustion engine to an electric drive system. Since the noise characteristics of the internal combustion engine and the electric drive system have changed significantly, the NVH performance of the electric drive has brought great challenges to the NVH performance of the entire electric vehicle.

[0003] In the related art, for the dual-motor structure, the dual-motor structure includes two independent motors and an electronic control unit. Compared with the single-motor structure, the number of cover plates is increased. Due to the low rigidity of the cover plate, it is easy to radiate sound under vibration, resulting in a large noise when the dual-motor structure is working. Summary of the invention

[0004] The purpose of the present disclosure is to provide a vehicle whose dual-motor structure can solve the technical problem of high noise during operation.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a vehicle, including a dual-motor structure, wherein the dual-motor structure includes two motors connected together, each of the motors includes at least two cover plates, and the multiple cover plates of the two motors include two cover plates with different natural frequencies; the multiple cover plates include two cover plates with different natural frequencies respectively belonging to one motor; the difference between the natural frequencies of the two cover plates with different natural frequencies is greater than or equal to 90Hz~110Hz.

[0006] Optionally, among the multiple cover plates of the two motors, the natural frequencies of any two of the cover plates are different.

[0007] Optionally, the natural frequency difference between any two of the cover plates is greater than or equal to 90 Hz to 110 Hz.

[0008] Optionally, the cover plate includes a cover plate body and a protrusion disposed on a first outer end surface of the cover plate body, the protrusion has a thickness in a thickness direction of the cover plate body, and the protrusion has a second outer end surface, Any two of the cover plates differ in at least one of the shape of the cover plate body, the thickness of the cover plate body, the shape of the protrusion, the thickness of the protrusion, and the area ratio of the second outer end surface to the corresponding first outer end surface.

[0009] Optionally, each of the motors includes at least two cover plates, and the at least two cover plates of each of the motors include an end cover plate and an electric control cover plate, wherein the cover plate bodies of the two end cover plates have the same shape, the cover plate bodies of the two electric control cover plates have the same shape, and the cover plate body of the end cover plate is different from the cover plate body of the electric control cover plate.

[0010] Optionally, the thicknesses of the two cover plate bodies of the end cover plate and the electric control cover plate of the motor are different.

[0011] Optionally, the shapes of the two protrusions in the end cover plate and the electric control cover plate of the motor are different.

[0012] Optionally, the thicknesses of any two protrusions are the same.

[0013] Optionally, each of the motors includes at least two cover plates, and the at least two cover plates of each of the motors include an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are the same, the natural frequencies of the two electric control cover plates are the same, and the natural frequency of the end cover plate is different from the natural frequency of the electric control cover plate.

[0014] Optionally, each of the motors comprises at least two cover plates, and the at least two cover plates of each of the motors comprise an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are the same, and the natural frequencies of the two electric control cover plates are different.

[0015] Optionally, each of the motors comprises at least two cover plates, and the at least two cover plates of each of the motors comprise an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are different, and the natural frequencies of the two electric control cover plates are the same.

[0016] Optionally, each of the motors includes at least two cover plates, and the at least two cover plates of each of the motors include an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are different, the natural frequencies of the two electric control cover plates are different, and the natural frequency of the end cover plate in at least one of the two motors is the same as the natural frequency of the electric control cover plate.

[0017] Through the above technical solution, in the dual-motor structure of the vehicle provided by the present invention, when the dual-motor structure is working, the excitation generated by the dual-motor structure will be transmitted to multiple cover plates. Since the present invention designs the multiple cover plates of the two motors to include two cover plates with different natural frequencies, the resonance probability of the two cover plates with different natural frequencies will be reduced, and the noise radiation amplitude after the sound sources of the two cover plates are superimposed will be smaller. Therefore, the noise of the dual-motor structure when working can be reduced, and the technical problem of high noise when the dual-motor structure is working can be solved.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a structural schematic diagram of a dual-motor structure provided according to an embodiment of the present disclosure; Figure 2 yes Figure 1 A schematic structural diagram of an embodiment of an end cover plate of the motor on the left side; Figure 3 yes Figure 1 A schematic structural diagram of an embodiment of an electric control cover plate of the motor on the left side of the middle; Figure 4 yes Figure 1 A schematic structural diagram of an embodiment of an electric control cover plate of the middle right motor; Figure 5 yes Figure 1 A schematic structural diagram of an embodiment of an end cover plate of the motor on the right side of the middle; Figure 6 It is an experimental curve diagram of the dual-motor structure provided according to an embodiment of the present disclosure.

[0020] Description of Reference Numerals 1-motor, 11-cover plate, 111-cover plate body, 1111-first outer end surface, 112-protrusion, 1121-second outer end surface, 12-electric control structure, 100-end cover plate, 200-electric control cover plate. DETAILED DESCRIPTION

[0021] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0022] In the present disclosure, unless otherwise stated, directional words such as "left" and "right" are used based on Figure 1 For details, please refer to Figure 1 The “inside” and “outside” refer to the inside and outside of the outline of each component. The terms “first” and “second” are used to distinguish one element from another and have no order or importance. In addition, when the following description refers to the drawings, the same reference numerals in different drawings represent the same or similar elements, and this disclosure will not repeat them.

[0023] According to an exemplary embodiment of the present disclosure, a vehicle is provided, including a dual-motor structure, referring to Figure 1As shown in , the dual-motor structure includes two motors 1 connected together, each motor 1 includes at least two cover plates 11, and the multiple cover plates 11 of the two motors 1 include two cover plates 11 with different natural frequencies.

[0024] Through the above technical scheme, in the dual-motor structure of the vehicle provided by the present invention, when the dual-motor structure is working, the excitation generated by the dual-motor structure will be transmitted to the multiple cover plates 11. Since the multiple cover plates 11 of the two motors 1 are designed in the present invention to include two cover plates 11 with different natural frequencies, the resonance probability of the two cover plates 11 with different natural frequencies will be reduced, and the noise radiation amplitude after the sound sources of the two cover plates 11 are superimposed will be smaller. Therefore, the noise of the dual-motor structure when it is working can be reduced, and the technical problem of high noise when the dual-motor structure is working can be solved.

[0025] It should be noted that the present disclosure does not limit the number of cover plates 11 included in the motor 1. For example, each motor 1 may have three or even more cover plates 11. In addition, among the two cover plates 11 with different natural frequencies, the two cover plates 11 may belong to one motor 1 respectively, or may belong to one motor 1 at the same time, and the present disclosure does not limit this.

[0026] In the exemplary embodiment of the present disclosure, the natural frequencies of any two of the multiple cover plates 11 of the two motors 1 may be different. In this way, the probability of resonance between any two cover plates 11 can be reduced, and the noise radiation amplitude after the sound sources of any two cover plates 11 are superimposed can be reduced, thereby further reducing the noise when the dual motors are working.

[0027] In some other embodiments of the present disclosure, the multiple cover plates 11 of the two motors 1 may also include at least two cover plates 11 with the same natural frequency.

[0028] For example, according to some embodiments, each motor 1 may include at least two cover plates 11, and the at least two cover plates 11 of each motor 1 include an end cover plate 100 and an electric control cover plate 200, wherein the natural frequencies of the two end cover plates 100 may be the same, the natural frequencies of the two electric control cover plates 200 may be the same, and the natural frequencies of the end cover plates 100 and the electric control cover plates 200 may be different. Here, the natural frequency of any end cover plate 100 is different from the natural frequency of any electric control cover plate 200.

[0029] For another example, according to some embodiments, each motor 1 may include at least two cover plates 11, and the at least two cover plates 11 of each motor 1 include an end cover plate 100 and an electric control cover plate 200, wherein the natural frequencies of the two end cover plates 100 may be the same, and the natural frequencies of the two electric control cover plates 200 may be different. In this case, the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of each motor 1 in the two motors 1 may be different. Of course, the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of one of the two motors 1 may be the same, and the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the other motor 1 may be different.

[0030] For another example, according to some embodiments, each motor 1 may include at least two cover plates 11, and the at least two cover plates 11 of each motor 1 include an end cover plate 100 and an electric control cover plate 200, wherein the natural frequencies of the two end cover plates 100 are different, and the natural frequencies of the two electric control cover plates 200 are the same. In this case, the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of each motor 1 in the two motors 1 may be different. Of course, the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of one of the two motors 1 may be the same, and the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the other motor 1 may be different.

[0031] For another example, according to some embodiments, each motor 1 may include at least two cover plates 11, and the at least two cover plates 11 of each motor 1 include an end cover plate 100 and an electric control cover plate 200, wherein the natural frequencies of the two end cover plates 100 are different, the natural frequencies of the two electric control cover plates 200 are different, and the natural frequency of the end cover plate 100 in at least one of the two motors 1 is the same as the natural frequency of the electric control cover plate 200. At this time, the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of each motor 1 in the two motors 1 may be the same. Of course, the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of one of the two motors 1 may be the same, and the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the other motor 1 may be different.

[0032] It should be noted that in the embodiment where the dual motor structure of the present disclosure includes two cover plates 11 with different natural frequencies, the present disclosure can make adaptive design for the natural frequency of each cover plate 11 as needed, and the present disclosure does not limit this. In addition, the natural frequency of the cover plate 11 can be adjusted by adjusting the shape of the cover plate body 111 of the cover plate 11 and / or the thickness of the cover plate body 111 and / or the shape of the protrusion 112 and / or the thickness of the protrusion 112 and / or the area ratio of the second outer end face 1121 to the corresponding first outer end face 1111, so as to achieve the same or different natural frequencies of the two cover plates 11.

[0033] In an exemplary embodiment of the present disclosure, the difference in the natural frequencies of the two cover plates 11 with different natural frequencies may be greater than or equal to 90Hz~110Hz. In this way, compared with the two cover plates 11 with the same natural frequency, the influence between the sound sources of the two cover plates 11 with a difference in natural frequencies greater than or equal to 90Hz~110Hz will be effectively reduced, thereby significantly reducing the noise radiation amplitude after the sound sources of the two cover plates 11 are superimposed, thereby significantly reducing the noise when the dual motors are working. In addition, compared with the dual motors with the same natural frequency of the cover plates 11, the noise of the dual motor structure of the present disclosure can be reduced by at least 6dB. Here, the difference in the natural frequencies of the two cover plates 11 refers to the difference between the larger natural frequency and the smaller natural frequency. Here, according to some embodiments, the difference in the natural frequencies of the two cover plates 11 with different natural frequencies may be greater than or equal to 100Hz, and the present disclosure is not limited to this. In addition, the greater the difference in the natural frequencies of the two cover plates 11, the better the effect of reducing the noise when the dual motors are working.

[0034] In some embodiments of the present disclosure, in the embodiment where the natural frequencies of any two cover plates 11 are different, the natural frequency difference between any two cover plates 11 can be greater than or equal to 90 Hz to 110 Hz. In this way, the noise of the dual motor structure during operation can be further reduced, and the user experience can be improved.

[0035] In some embodiments of the present disclosure, when the natural frequencies of any two cover plates 11 are different, Figures 1 to 5 As shown in the figure, the cover plate 11 may include a cover plate body 111 and a protrusion 112 arranged on a first outer end surface 1111 of the cover plate body 111, the protrusion 112 has a thickness in the thickness direction of the cover plate body 111, and the protrusion 112 has a second outer end surface 1121, wherein any two cover plates 11 differ in at least one of the shape of the cover plate body 111, the thickness of the cover plate body 111, the shape of the protrusion 112, the thickness of the protrusion 112, and the area ratio of the second outer end surface 1121 to the corresponding first outer end surface 1111. In this way, by making the shapes of the cover plates 111 and / or the thickness of the cover plates 111 and / or the shapes of the protrusions 112 and / or the thickness of the protrusions 112 and / or the area ratios of the second outer end faces 1121 and the corresponding first outer end faces 1111 of the two cover plates 11 different, the natural frequencies of the two cover plates 11 can be made different, thereby facilitating the realization of different natural frequencies of the two cover plates 11, having a simple structure, and facilitating the adjustment of the difference in the natural frequencies of the two cover plates 11.

[0036] In some embodiments of the present disclosure, reference Figures 1 to 5As shown in , each motor 1 may include at least two cover plates 11, and the at least two cover plates 11 of each motor 1 include an end cover plate 100 and an electric control cover plate 200, wherein the shape of the cover plate bodies 111 of the two end cover plates 100 is the same, and the shape of the cover plate bodies 111 of the two electric control cover plates 200 is the same, so that it is conducive to the symmetrical design of the two motors 1. Among them, the shape of the cover plate body 111 of the end cover plate 100 is different from the shape of the cover plate body 111 of the electric control cover plate 200. In this way, it is conducive to the differentiation of the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the same motor. Here, according to some embodiments, the shape of the cover plate body 111 of the end cover plate 100 may be circular, and the shape of the cover plate body 111 of the electric control cover plate 200 may be square, and the present disclosure is not limited to this.

[0037] Optionally, refer to Figures 1 to 5 As shown in , the thickness of the two cover plate bodies 111 in the end cover plate 100 and the electric control cover plate 200 of the motor 1 can be different. In this way, it is beneficial to differentiate the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the same motor 1. Here, since the distance between the end cover plate 100 and the electric control cover plate 200 of the same motor 1 is close or the excitations are similar, the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the same motor 1 are designed to be different, which is also beneficial to reduce the noise when the dual motor structure is working. It should be noted that the present disclosure does not limit the thickness of the two cover plate bodies 111 of the end cover plate 100 and the electric control cover plate 200 belonging to the two motors 1, and the thickness of the two cover plate bodies 111 of the two motors 1 can be the same or different.

[0038] Optionally, refer to Figures 1 to 5 As shown in , the shapes of the two protrusions 112 in the end cover plate 100 and the electric control cover plate 200 of the motor 1 are different. In this way, it is beneficial to differentiate the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the same motor 1. Here, since the distance between the end cover plate 100 and the electric control cover plate 200 of the same motor 1 is close or the excitations received are similar, therefore, designing the natural frequencies of the end cover plate 100 and the electric control cover plate 200 of the same motor 1 to be different is also beneficial to reduce the noise when the dual motor structure is working. It should be noted that the present disclosure does not limit the thickness of the two protrusions 112 of the end cover plate 100 and the electric control cover plate 200 belonging to the two motors 1, and the thickness of the two protrusions 112 of the two motors 1 can be the same or different.

[0039] Optionally, the thickness of any two protrusions 112 are the same. Here, since the protrusions 112 have little effect on the natural frequency of the cover plate 11, the thickness of any two protrusions 112 is designed to be the same, which can facilitate the processing of each cover plate 11 while having little effect on the difference in the natural frequencies of the two cover plates 11. Of course, in other embodiments of the present disclosure, the thickness of any two protrusions 112 may also be different, and the present disclosure is not limited to this.

[0040] Optionally, the plurality of cover plates 11 may include two cover plates 11 with the same area ratio, or may include two cover plates 11 with different area ratios, and the present disclosure does not limit this. Here, "area ratio" refers to the area ratio of the second outer end surface 1121 to the corresponding first outer end surface 1111, and the present disclosure will not elaborate on this in the following embodiments.

[0041] In some embodiments of the present disclosure, referring to Table 1 below, the left end cover plate can refer to Figure 2 , the left electric control cover can refer to Figure 3 , right electric control cover can refer to Figure 4 , the right end cover can refer to Figure 5 , where the left end cover and the left electric control cover can belong to Figure 1 The motor on the left side, the right electric control cover and the right end cover can belong to Figure 1 The motor on the right side of the center.

[0042] Table 1:

[0043] According to Table 1, the designed natural frequency of the left end cover is approximately 2100 Hz, the natural frequency of the left electric control cover is approximately 560 Hz, the natural frequency of the right electric control cover is approximately 800 Hz, and the natural frequency of the right end cover is approximately 1400 Hz. It can be seen that the difference between the natural frequencies of any two cover plates 11 is greater than 100 Hz.

[0044] In some embodiments of the present disclosure, reference Figure 6 As shown in Figure 6The horizontal axis of the experimental curve graph represents the rotational speed of the dual-motor structure, and the vertical axis represents the noise radiation amplitude after the sound sources of the two cover plates 11 are superimposed. Among them, the solid line of the first experimental example represents the curve graph of two cover plates 11 with the same natural frequency. The dotted line of the second experimental example represents the curve graph of two cover plates 11 with a natural frequency difference greater than or equal to 90Hz~100Hz. It can be seen from the experimental curve graph that when the excitation frequency transmitted by the dual-motor structure is equal to the natural frequency of the two cover plates 11 with the same natural frequency, at the rotational speed corresponding to the excitation frequency, the noise radiation amplitude of the two cover plates 11 with a natural frequency difference greater than or equal to 90Hz~100Hz is significantly smaller than the noise radiation amplitude of the two cover plates 11 with the same natural frequency. Therefore, the dual-motor structure disclosed in the present invention can solve the technical problem of high noise during its own operation.

[0045] In addition, reference Figure 1 As shown in , each motor 1 further includes an electric control structure 12 , and the electric control cover plate 200 is used to cover the electric control structure 12 , which is not limited in the present disclosure.

[0046] According to a second aspect of the present disclosure, a vehicle is provided, comprising the dual-motor structure as described above. The vehicle has all the beneficial effects of the dual-motor structure described above, which will not be elaborated in detail in the present disclosure.

[0047] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0049] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle, characterized in that: It includes a dual-motor structure, which includes two motors connected together, each of the motors includes at least two cover plates, the multiple cover plates of the two motors include two cover plates with different natural frequencies; the multiple cover plates include two cover plates with different natural frequencies respectively belonging to one motor; the difference between the natural frequencies of the two cover plates with different natural frequencies is greater than or equal to 90Hz~110Hz.

2. The vehicle according to claim 1, characterized in that Among the multiple cover plates of the two motors, the natural frequencies of any two of the cover plates are different.

3. The vehicle according to claim 2, characterized in that The natural frequency difference between any two of the cover plates is greater than or equal to 90 Hz to 110 Hz.

4. The vehicle according to claim 1, characterized in that The cover plate includes a cover plate body and a protrusion disposed on a first outer end surface of the cover plate body, wherein the protrusion has a thickness in a thickness direction of the cover plate body and has a second outer end surface. Any two of the cover plates differ in at least one of the shape of the cover plate body, the thickness of the cover plate body, the shape of the protrusion, the thickness of the protrusion, and the area ratio of the second outer end surface to the corresponding first outer end surface.

5. The vehicle according to claim 4, characterized in that Each of the motors comprises at least two cover plates, and the at least two cover plates of each of the motors comprise an end cover plate and an electric control cover plate, wherein the cover plate bodies of the two end cover plates have the same shape, the cover plate bodies of the two electric control cover plates have the same shape, and the cover plate bodies of the end cover plates are different in shape from the cover plate bodies of the electric control cover plates.

6. The vehicle according to claim 5, characterized in that The thicknesses of the two cover plate bodies in the end cover plate and the electric control cover plate of the motor are different.

7. The vehicle according to claim 5, characterized in that The shapes of the two protrusions in the end cover plate and the electric control cover plate of the motor are different.

8. The vehicle according to claim 5, characterized in that The thicknesses of any two protrusions are the same.

9. The vehicle according to claim 1, characterized in that Each of the motors comprises at least two cover plates, and the at least two cover plates of each of the motors comprise an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are the same, the natural frequencies of the two electric control cover plates are the same, and the natural frequency of the end cover plate is different from the natural frequency of the electric control cover plate.

10. The vehicle according to claim 1, characterized in that Each of the motors comprises at least two cover plates, and the at least two cover plates of each of the motors comprise an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are the same, and the natural frequencies of the two electric control cover plates are different.

11. The vehicle according to claim 1, characterized in that Each of the motors comprises at least two cover plates, and the at least two cover plates of each of the motors comprise an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are different, and the natural frequencies of the two electric control cover plates are the same.

12. The vehicle according to claim 1, characterized in that Each of the motors includes at least two cover plates, and the at least two cover plates of each of the motors include an end cover plate and an electric control cover plate, wherein the natural frequencies of the two end cover plates are different, the natural frequencies of the two electric control cover plates are different, and the natural frequency of the end cover plate in at least one of the two motors is the same as the natural frequency of the electric control cover plate.

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