Vibration isolation structure, motor and driving assembly
Through the multi-layer dielectric layer design of the stator and the first vibration isolation gasket, combined with the pin and bolt connection, the motor vibration noise problem is solved, and the effect of reducing noise and simplifying the structure without affecting the torque performance is achieved, and good heat dissipation is maintained.
Patent Information
- Application Number
- CN202420165188.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-01-23
AI Technical Summary
When existing motors are rigidly connected, vibration noise is obvious and traditional noise reduction methods will affect torque performance or increase costs. A vibration isolation structure that reduces noise and simplifies the structure while reducing air gaps.
The design of the stator and the first vibration isolation gasket, including a multi-layer dielectric layer of rubber and metal composite material, combined with the connection method of pins and bolts, is formed to transmit torque and reduce vibration.
It is achieved to significantly reduce noise and vibration without reducing torque performance, simplify the structure and maintain good heat dissipation effect, and reduce manufacturing costs.
Smart Images
Figure CN223297421U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a vibration isolation structure, a motor and a drive assembly. Background Art
[0002] Most motor stators are rigidly connected to the housing, such as by shrink fitting or bolting. During operation, the motor stator generates vibrations caused by fluctuating electromagnetic forces. When the housing and stator are rigidly connected, this vibration will be transmitted to the housing and radiated into the air by the housing's cavity and thin-walled structure, generating noise that is clearly perceptible to the human ear. Among this noise, the vibrations generated by the stator's own tooth torque and the rotor's own magnetic pole period are the most obvious. To reduce this noise, traditional methods include adopting a short-pitch winding structure or increasing the stator-rotor air gap, but both methods will reduce torque performance. Other technologies reduce the external radiation noise of the motor by adding acoustic wrapping to the motor surface, but on the one hand, the cost of the wrapping is very high, and while blocking the noise, it also blocks the heat dissipation of the motor housing to the environment, causing the motor temperature to rise.
[0003] In summary, there is an urgent need for a vibration isolation structure that can reduce the air gap, increase the torque, simplify the structure, and reduce the manufacturing cost. Utility Model Content
[0004] The utility model aims to provide a vibration isolation structure, a drive assembly and a vehicle, and the technical problem to be solved is to simplify the structure and reduce the manufacturing cost while reducing the air gap and increasing the torque.
[0005] The embodiment of the utility model discloses a vibration isolation structure, which includes a stator and a first vibration isolation pad. The stator includes a main body and a protrusion arranged on the circumference of the main body. The first vibration isolation pad is connected to one side of the protrusion.
[0006] Furthermore, the number of the protrusions and the number of the first vibration isolation pads are both multiple, and the multiple first vibration isolation pads correspond one-to-one to the multiple protrusions.
[0007] Specifically, the first vibration isolation pad includes multiple dielectric layers that are stacked, wherein two adjacent dielectric layers are a rubber layer and a metal layer respectively.
[0008] Specifically, the thickness of the rubber layer is a, 0.3 mm ≤ a < 3 mm.
[0009] Furthermore, the cross section of the first vibration isolation gasket is annular, and the first vibration isolation gasket and the raised portion are adapted to each other.
[0010] Furthermore, a through hole is provided inside the raised portion; the vibration isolation structure also includes a pin, which is passed through the through hole.
[0011] Specifically, the number of the pins is smaller than the number of the protrusions, and the pins are inserted into the through holes of some of the protrusions.
[0012] Specifically, the pin is a hollow pin, and the vibration isolation structure further includes a bolt, which is passed through the hollow pin.
[0013] Specifically, a second vibration isolation washer or an anti-loosening washer is provided between the bolt and the other side of the protrusion away from the first vibration isolation washer.
[0014] Specifically, the pin is a solid pin.
[0015] An embodiment of the present utility model further discloses a motor, including the vibration isolation structure as described above, the motor also including an outer shell, the outer contour of the stator and the inner contour of the outer shell are adapted to each other, a first vibration isolation gasket is arranged between the outer shell and the stator, and a positioning boss for assembling the stator is provided in the outer shell.
[0016] Furthermore, a matching hole is provided at the boss end surface of the positioning boss, and an anti-loosening filler is provided in the matching hole.
[0017] The embodiment of the present utility model further discloses a drive assembly, including the above-mentioned vibration isolation structure and / or the above-mentioned motor.
[0018] The utility model has the following beneficial effects, including but not limited to:
[0019] 1) The vibration isolation structure of the present invention has no acoustic wrapping, and the design of the stator and the first vibration isolation gasket cooperating with each other has a simple structure, low cost, and can ensure good heat dissipation effect of the motor, thereby avoiding abnormal heating of the motor.
[0020] 2) The vibration isolation structure of the present invention does not require a short winding pitch, can reduce the air gap, and improve the noise and vibration problems of the motor without reducing the torque performance.
[0021] 3) The motor of the present invention has a significant noise reduction effect through the vibration isolation structure, which can effectively solve the defect of excessive noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] This specification will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, like numbers represent like structures, wherein:
[0023] Figure 1 An exploded view of a motor provided in an embodiment of the present utility model;
[0024] Figure 2 A schematic structural diagram of a first vibration isolation pad provided in an embodiment of the present utility model;
[0025] Figure 3 One of the schematic diagrams of the multi-layer dielectric layer of the first vibration isolation pad provided by an embodiment of the present utility model;
[0026] Figure 4 A second schematic diagram of the multi-layer dielectric layer of the first vibration isolation pad provided by an embodiment of the present utility model;
[0027] Figure 5 A third schematic diagram of the multi-layer dielectric layer of the first vibration isolation pad provided by an embodiment of the present utility model;
[0028] Figure 6 A cross-sectional view of a motor provided in an embodiment of the present utility model;
[0029] Figure 7 for Figure 6 An enlarged schematic diagram of the middle part of the structure;
[0030] Figure 8 A schematic structural diagram of a positioning boss provided in an embodiment of the present utility model;
[0031] Figure 9 One of the performance comparison diagrams of the motor provided by the embodiment of the utility model and the motor provided by the related art;
[0032] Figure 10 The second performance comparison diagram of the motor provided by the embodiment of the utility model and the motor provided by the related art;
[0033] Figure 11 Figure 3 comparing the performance of the motor provided by the embodiment of the present utility model and the motor provided by the related art;
[0034] Figure 12 The fourth performance comparison diagram of the motor provided by the embodiment of the utility model and the motor provided by the related art.
[0035] Icons: 10-stator; 101-main body; 102-raised part; 11-first vibration isolation gasket; 121-hollow pin; 122-bolt; 13-second vibration isolation gasket; 200-motor; 21-outer shell; 22-positioning boss; 221-matching hole; 31-rubber layer; 32-metal layer. DETAILED DESCRIPTION
[0036] To more clearly illustrate the technical solutions of the embodiments of this specification, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this specification. Those skilled in the art can apply this specification to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.
[0037] It should be understood that the terms "system," "device," "unit," and / or "module" used herein are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, other terms may be used to replace a term if they achieve the same purpose.
[0038] As used in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not refer to the singular but also include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.
[0039] Flowcharts are used throughout this specification to illustrate the operations performed by systems according to embodiments of this specification. It should be understood that preceding or following operations do not necessarily need to be performed in exact order. Instead, the steps may be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.
[0040] Figure 1 This is an exploded view of the motor 200 provided in the embodiment of the present invention. Figure 1 As shown, this embodiment provides a vibration isolation structure, which includes a stator 10 and a first vibration isolation pad 11. The stator 10 includes a body 101 and a convex portion 102 arranged circumferentially on the body 101. The first vibration isolation pad 11 is connected to one side of the convex portion 102.
[0041] It is worth noting that this vibration isolation structure lacks acoustic encapsulation. The coordinated design of the stator 10 and the first vibration isolation pad 11 offers a simple structure, low cost, and excellent heat dissipation for the motor 200, preventing abnormal heating of the motor 200. Furthermore, this vibration isolation structure eliminates the need for short winding pitch, reducing the air gap and improving noise and vibration performance of the motor 200 without compromising torque performance.
[0042] It is also worth noting that the first vibration isolation pad 11 can be detachably connected to one side of the raised portion 102. The first vibration isolation pad 11 can also be integrally formed with the stator 10, for example, a corner of the raised portion 102 is dug out and replaced with the first vibration isolation pad 11. In addition, the first vibration isolation pad 11 can also be integrally formed with the stator 10. Figure 6 The positioning boss 22 is integrally formed. This embodiment does not constitute a limitation on the specific position and connection method of the first vibration isolation pad 11, but is only an example of its position and connection method, as long as it can play a vibration reduction role.
[0043] like Figure 1 As shown, there are multiple protrusions 102 and multiple first vibration isolation pads 11 , and the multiple first vibration isolation pads 11 correspond one-to-one to the multiple protrusions 102 .
[0044] It is worth noting that setting the number of the protrusions 102 and the first vibration isolation pads 11 to be multiple and corresponding one to one can further improve the vibration isolation effect of the vibration isolation structure and improve the NVH performance (noise, vibration and harshness) of the motor 200. Depending on the specific implementation environment, the number of the protrusions 102 and the first vibration isolation pads 11 can be four (for example, Figure 1 As shown), it can also be 3, 5, etc. This embodiment does not constitute a limitation on the specific number of the protrusions 102 and the first vibration isolation gaskets 11, but only illustrates the distance between their numbers. By increasing or decreasing the number, the manufacturing cost can be effectively controlled and the vibration isolation effect of the vibration isolation structure can be guaranteed.
[0045] like Figure 2-Figure 5 As shown, the first vibration isolation pad 11 includes multiple dielectric layers stacked together, wherein two adjacent dielectric layers are a rubber layer 31 and a metal layer 32 respectively.
[0046] Specifically, the first vibration isolation pad 11 can be a shock-absorbing material having the following metal and rubber composite characteristics, and the composite methods of the two are as follows: rubber layer 31+metal layer 32+rubber layer 31 (such as Figure 3 As shown), metal layer 32+rubber layer 31+metal layer 32 (as shown Figure 4 As shown), metal layer 32+rubber layer 31 (as shown Figure 5 The metal layer 32 can be made of stainless steel or aluminum. The composite connection prevents delamination (even during operation) and prevents deformation or extrusion under pressure. The rubber layer 31 can be made of an oil-resistant and temperature-resistant material such as nitrile, hydrogenated nitrile, or fluorosilicone rubber.
[0047] Optionally, the thickness of the rubber layer 31 is a, 0.3 mm ≤ a < 3 mm.
[0048] Specifically, the total thickness of the first vibration isolation pad 11 and the proportion of the rubber layer 31 can be adjusted based on the desired vibration isolation effect and axial load. Selecting a thinner rubber layer 31 pad, ensuring that the total thickness of the rubber layer 31 is no less than 0.3 mm and no more than 3 mm, allows the first vibration isolation pad 11 to achieve a good vibration isolation effect while also reducing the axial fixed load.
[0049] like Figure 2 As shown, the cross section of the first vibration isolation pad 11 is annular, and the first vibration isolation pad 11 and the raised portion 102 are adapted to each other.
[0050] It is understood that the first vibration isolation gasket 11 can be annular in shape. In this embodiment, the annular first vibration isolation gasket 11 can completely fill the contact surface between the stator 10 and the outer shell 21. Depending on the specific implementation environment, the first vibration isolation gasket 11 can also have other shapes that are adapted to the contact position between the stator 10 and the outer shell 21 so that the contact surface is completely filled by the gasket.
[0051] Figure 6 This is a cross-sectional view of the motor 200 provided in an embodiment of the present invention. Figure 6 and Figure 7 As shown, the protrusion 102 has a through hole inside; the vibration isolation structure also includes a pin, which is inserted into the through hole.
[0052] It is worth noting that when the torque of the motor 200 is large, or the rubber layer 31 of the first vibration isolation gasket 11 is thicker (taking into account the elastic compression and possible permanent compression deformation of the rubber), the ability of the first vibration isolation gasket 11 to transmit the friction force between the stator 10 and the outer shell 21 is relatively weak. At this time, the additional pins can complete the torque transmission, thereby improving the vibration isolation effect.
[0053] In this embodiment, the number of the pins is smaller than the number of the protrusions 102 , and the pins are inserted into the through holes of some of the protrusions 102 .
[0054] It is understandable that in this embodiment, the stator 10 has four protrusions 102, but only two of the protrusions 102 use pins. The number of pins selected can be determined according to the requirements of positioning and torque transmission to achieve the purpose of reducing costs and simplifying the structure.
[0055] Please refer again Figure 7 The pin is a hollow pin 121 , and the vibration isolation structure further includes a bolt 122 , which is passed through the hollow pin 121 .
[0056] It is understandable that in one implementation of this embodiment, a hollow pin 121 is used, one end of which is inserted into the through hole of the raised portion 102, and the other end is inserted into the matching hole 221 provided at the boss end face of the outer shell 21. The interior of the hollow pin 121 is a hollow hole for passing the bolt 122. The outer surface of the pin is tightly fitted with the through hole of the raised portion 102 and the matching hole 221 on the outer shell 21, respectively, to transmit torque. In addition, in this embodiment, the upper end face of the raised portion 102 can be in direct contact with the head of the bolt 122, or can be in contact with the head of the bolt 122 through a second vibration isolation gasket with a vibration isolation function, or can be in contact with the head of the bolt 122 through an anti-loosening gasket with an anti-loosening function, or can be in direct contact with the head of the anti-loosening bolt 122 with an anti-loosening function.
[0057] Correspondingly, in another implementation of this embodiment, the pin is a solid pin, one end of which is tightly fitted with the outer shell 21 or the raised portion 102 , and the other end is inserted into the hole of the accessory.
[0058] In addition, the embodiment of the present invention further discloses a motor 200, which also includes an outer shell 21, the outer contour of the stator 10 and the inner contour of the outer shell 21 are adapted to each other, the first vibration isolation gasket 11 is arranged between the outer shell 21 and the stator 10, and a positioning boss 22 for assembling the stator 10 is provided in the outer shell 21.
[0059] It is worth noting that, as shown in the figure, the positioning boss 22 is parallel to the lower end face of the stator 10 after assembly. In this embodiment, the boss end face of the positioning boss 22 is sized and positioned as large as possible to contact the core end face without interfering with the windings. A mating hole 221 is provided at the center of the end face, and the tail thread of the fixing bolt 122 mates with this thread to secure the stator 10. To prevent the bolt 122 from loosening due to rubber deformation, the mating hole 221 contains a locking filler, such as thread adhesive.
[0060] It is also worth mentioning that, in the embodiment corresponding to the solid pin, the positioning boss 22 that cooperates with the protrusion 102 having the solid pin has, in addition to the above features, the following features: Figure 7 A positioning sleeve (not shown) is shown that cooperates with a solid pin.
[0061] Please refer to Figures 9-11 , Figure 9 A schematic diagram comparing the 72nd order NVH (Noise, Vibration, Harshness) of the motor provided in the embodiment of the utility model and the motor provided in the related art (without the first vibration isolation gasket) under half-load conditions. Figure 10 A schematic diagram comparing the NVH levels of the motor provided in the embodiment of the present invention and the motor provided in the related art (without the first vibration isolation pad) at 144 degrees under half-load conditions; Figure 11 A schematic diagram comparing the 72nd-order NVH performance of the motor provided in the embodiment of the present invention and the motor provided in the related art (without the first vibration isolation pad) under full load conditions; Figure 12 Schematic diagram of 144-order NVH comparison between the motor provided in the embodiment of the present invention and the motor provided in the related art (without the first vibration isolation gasket) under full load conditions.
[0062] It can be seen from the above performance comparison chart that under half-load and full-load conditions, the 72nd and 144th orders can be reduced by a maximum of 11dB in the high-frequency range, and the noise reduction effect is obvious. Therefore, the motor 200 can block the vibration of the stator 10 from being transmitted to the casing through the vibration isolation structure, thereby improving the motor NVH without causing torque reduction and motor overheating problems.
[0063] The embodiment of the present invention further discloses a drive assembly, including the above-mentioned vibration isolation structure and / or the above-mentioned motor 200, having all the beneficial effects of both.
[0064] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit this specification. Although not explicitly stated herein, various modifications, improvements, and revisions to this specification may be made by those skilled in the art. Such modifications, improvements, and revisions are suggested in this specification and remain within the spirit and scope of the exemplary embodiments of this specification.
[0065] Finally, it should be understood that the embodiments in this specification are intended only to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly described and illustrated in this specification.
Claims
1. A vibration isolation structure, characterized in that: include: A stator, the stator comprising a main body and a protrusion arranged in a circumferential direction of the main body; The first vibration isolation gasket is connected to one side of the protrusion; the first vibration isolation gasket includes multiple dielectric layers stacked together, wherein two adjacent dielectric layers are a rubber layer and a metal layer respectively.
2. The vibration isolation structure according to claim 1, characterized in that: There are multiple protrusions and multiple first vibration isolation pads, and the multiple first vibration isolation pads correspond to the multiple protrusions in a one-to-one manner.
3. The vibration isolation structure according to claim 1, characterized in that: The thickness of the rubber layer is a, 0.3 mm ≤ a < 3 mm.
4. The vibration isolation structure according to claim 2, characterized in that: The cross section of the first vibration isolation gasket is annular, and the first vibration isolation gasket and the protrusion are adapted to each other.
5. The vibration isolation structure according to claim 1 or 2, characterized in that: The protrusion has a through hole inside; The vibration isolation structure further includes a pin, which is passed through the through hole.
6. The vibration isolation structure according to claim 5, characterized in that: The number of the pins is smaller than the number of the protrusions, and the pins are passed through the through holes of some of the protrusions.
7. The vibration isolation structure according to claim 5, characterized in that: The pin is a hollow pin, and the vibration isolation structure further includes a bolt, which is passed through the hollow pin.
8. The vibration isolation structure according to claim 7, characterized in that: A second vibration isolation washer or an anti-loosening washer is provided between the bolt and the other side of the protrusion away from the first vibration isolation washer.
9. The vibration isolation structure according to claim 5, characterized in that: The pin is a solid pin.
10. A motor comprising the vibration isolation structure according to any one of claims 1 to 9, characterized in that: The motor further includes an outer shell, the outer contour of the stator and the inner contour of the outer shell are adapted to each other, the first vibration isolation gasket is arranged between the outer shell and the stator, and a positioning boss for assembling the stator is provided in the outer shell.
11. The motor according to claim 10, characterized in that A matching hole is provided at the boss end surface of the positioning boss, and an anti-loosening filler is provided in the matching hole.
12. A drive assembly, characterized in that: The method comprises the vibration isolation structure according to any one of claims 1 to 9, and / or the motor according to claim 10 or 11.