Casing and motor

Abstract

The utility model discloses a casing and a motor, the casing comprises an inner casing, an outer casing and a first damping structure, the outer casing is sleeved outside the inner casing, the first damping structure is arranged between the inner casing and the outer casing, and the inner casing and the outer casing are arranged at an interval and are connected through the first damping structure. According to the technical scheme of the utility model, the technical problem of poor vibration and noise reduction effect of the existing motor vibration reduction mode is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor noise, in particular to a casing and a motor. Background Art

[0002] A motor is an electromagnetic device that realizes the conversion or transmission of electric energy based on electromagnetic induction. Its main function is to generate driving torque as a power source to drive electrical appliances or various mechanical equipment to work. With the development and progress of technology, motors have been widely used in various fields of the national economy. In order to improve the power density and torque density of the motor, higher magnetic loads and electric loads are usually used. Although this will increase the power per unit volume of the motor, it will increase the harmonic content of the air gap magnetic field, thereby causing high-frequency, high-amplitude vibration noise. At present, vibration reduction methods such as increasing the thickness of the shell are usually used to reduce vibration noise. However, the above-mentioned vibration reduction methods have limited vibration reduction and noise reduction effects and will also increase the size of the motor. Utility Model Content

[0003] The main purpose of the utility model is to provide a casing and a motor, aiming to solve the technical problem that the existing motor vibration reduction method has poor vibration reduction and noise reduction effects.

[0004] To achieve the above-mentioned purpose, an embodiment of the utility model proposes a casing, which includes an inner shell, an outer shell arranged outside the inner shell, and a first damping structure arranged between the inner shell and the outer shell, and the inner shell and the outer shell are arranged at intervals and connected by the first damping structure.

[0005] Optionally, in an embodiment of the present utility model, the first damping structure includes a support member and a damping member arranged outside the support member, and the damping member connects the inner shell and the outer shell.

[0006] Optionally, in an embodiment of the present invention, a plurality of the first damping structures are provided at intervals along the circumference of the inner shell.

[0007] Optionally, in one embodiment of the utility model, the inner shell and the outer shell are spaced apart to form a first flow channel, at least one end of the first damping structure along the axial direction of the inner shell is spaced apart from the end face of the inner shell to form a second flow channel, and the first flow channel and the second flow channel are connected to form a liquid cooling channel.

[0008] Optionally, in an embodiment of the present utility model, two adjacent second flow channels are staggered in the circumferential direction of the inner shell.

[0009] Optionally, in an embodiment of the utility model, one end of the first damping structure is embedded in the outer surface of the inner shell, and the other end of the first damping structure is plugged into the inner surface of the outer shell.

[0010] Optionally, in an embodiment of the utility model, the inner shell is provided with a mounting groove, the outer shell is provided with a slot, one end of the first damping structure is interference fit with the mounting groove, and the other end of the first damping structure is interference fit with the slot.

[0011] To achieve the above objectives, an embodiment of the utility model provides a motor, which includes a casing and a stator core arranged in the casing, and the casing is the casing described above.

[0012] Optionally, in an embodiment of the utility model, the motor further includes a second damping structure, wherein the second damping structure is disposed between the inner housing and the stator core and connects the inner housing and the stator core.

[0013] Optionally, in an embodiment of the present invention, the second damping structure is at least partially covered on the outer circumferential surface of the stator core.

[0014] Compared with the prior art, in a technical solution proposed by the utility model, by setting a first damping structure between the inner shell and the outer shell, the vibration transmitted from the stator to the casing can be absorbed, thereby effectively reducing the vibration noise of the casing, alleviating the large vibration displacement and acceleration problems caused by the stator resonance, achieving low vibration and low noise operation of the motor, and improving the quietness and comfort during the operation of the motor. Moreover, the technical solution of the present application does not need to increase the thickness of the casing, and can effectively reduce the volume of the motor and increase the scope of application. At the same time, the reduction in the thickness of the casing can also accelerate heat transfer and improve the heat dissipation capacity of the motor. In addition, the technical solution of the present application is to reduce vibration by improving the anti-noise ability of the transmission path, without weakening the electromagnetic force excitation, preventing the motor torque, power density and efficiency from decreasing, and improving the core competitiveness of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a casing embodiment of the utility model;

[0017] Figure 2 It is a schematic cross-sectional structure diagram of a casing embodiment of the utility model;

[0018] Figure 3This is a schematic diagram of the exploded structure of the housing embodiment of the utility model;

[0019] Figure 4 The structure diagram of the motor embodiment of the utility model without the casing Figure 1 ;

[0020] Figure 5 The structure diagram of the motor embodiment of the utility model without the casing Figure 2 .

[0021] Description of Figure Numbers:

[0022] Label name Label name 100 chassis 110 Inner shell 111 First end face 112 Second end face 120 Outer shell 130 The first damping structure 131 Support 132 Damping parts 141 First runner 142 Second flow channel 151 Mounting slot 152 Slots 200 Stator core 300 Second damping structure

[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present utility model.

[0029] Motors usually use higher magnetic loads and electrical loads to increase their power density and torque density, but this will increase the harmonic content of the air gap magnetic field, thereby causing high-frequency, high-amplitude vibration noise. The high-frequency vibration noise of motors has become a pain point and common problem in the industry.

[0030] At present, the industry generally focuses on weakening the vibration noise of the motor by weakening the excitation source. Although weakening the electromagnetic force excitation can fundamentally reduce the motor noise level, it will also lead to a decrease in motor torque, power density and efficiency, which will reduce the core competitiveness of the motor.

[0031] Some products also use a thick motor shell to reduce vibration. However, the thick shell not only increases the size of the motor, but also reduces the motor's heat dissipation capacity, and the noise reduction effect is not ideal.

[0032] In view of this, an embodiment of the utility model provides a casing and a motor, which reduce vibration by improving the anti-vibration and noise capability of the transmission path, that is, by setting a first damping structure between the inner casing and the outer casing, which can absorb the vibration transmitted from the stator to the casing, effectively reduce the vibration noise of the casing, and do not need to weaken the electromagnetic force excitation, thereby preventing the motor torque, power density and efficiency from decreasing, and improving the core competitiveness of the motor.

[0033] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-Figure 3As shown, an embodiment of the utility model proposes a casing 100, which includes an inner casing 110, an outer casing 120 sleeved on the outside of the inner casing 110, and a first damping structure 130 arranged between the inner casing 110 and the outer casing 120. The inner casing 110 and the outer casing 120 are arranged at intervals and connected by the first damping structure 130.

[0035] In the technical solution adopted in this embodiment, by setting the first damping structure 130 between the inner shell 110 and the outer shell 120, the vibration transmitted from the stator to the casing 100 can be absorbed, thereby effectively reducing the vibration noise of the casing 100, alleviating the large vibration displacement and acceleration problems caused by the stator resonance, achieving low vibration and low noise operation of the motor, and improving the quietness and comfort during the operation of the motor. Moreover, the technical solution of the present application does not need to increase the thickness of the casing 100, can effectively reduce the volume of the motor, and improve the scope of application. At the same time, the reduction in the thickness of the casing 100 can also accelerate heat transfer and improve the heat dissipation capacity of the motor. In addition, the technical solution of the present application is to reduce vibration by improving the anti-noise ability of the transmission path, without weakening the electromagnetic force excitation, preventing the motor torque, power density and efficiency from decreasing, and improving the core competitiveness of the motor.

[0036] Specifically, the housing 100 proposed in this embodiment can be applied to a motor, especially a permanent magnet motor. The housing 100 includes an inner housing 110, an outer housing 120 and a first damping structure 130. Among them, the inner housing 110 and the outer housing 120 are nested, that is, the outer housing 120 is sleeved on the outside of the inner housing 110, and the inner wall of the outer housing 120 and the outer wall of the inner housing 110 are not in contact. In other words, there is a gap between the inner wall of the outer housing 120 and the outer wall of the inner housing 110, and the first damping structure 130 is arranged in the gap. It can be understood that the first damping structure 130 connects the inner housing 110 and the outer housing 120. The vibration generated by the stator is first transmitted to the inner housing 110, and then transmitted toward the outer housing 120 through the first damping structure 130. In this process, the first damping structure 130 can absorb the vibration transmitted to the inner housing 110, and the vibration transmitted to the outer housing 120 is reduced or disappears, thereby effectively preventing the entire housing 100 from vibrating and reducing vibration noise.

[0037] In one embodiment, the inner shell 110 and the outer shell 120 can be made of metal aluminum, which has good thermal conductivity and can effectively improve the heat dissipation effect of the housing 100. Of course, the inner shell 110 and the outer shell 120 can also be made of other materials, which are not limited here.

[0038] As an optional method, the first damping structure 130 can be made of a material with a damping coefficient greater than 0.1, such as high-damping rubber, high-damping magnesium alloy material, etc., so that more vibrations can be absorbed and the vibration reduction and noise reduction effects can be improved.

[0039] For example, refer to Figure 3 In an embodiment of the present invention, the first damping structure 130 includes a support member 131 and a damping member 132 disposed outside the support member 131 , and the damping member 132 connects the inner shell 110 and the outer shell 120 .

[0040] In this embodiment, the first damping structure 130 includes a support member 131 and a damping member 132. Among them, the support member 131 is used to provide support so that the inner shell 110 and the outer shell 120 remain fixed in the circumferential direction to form an integral component. The support member 131 can be made of an alloy material with a certain strength, such as a magnesium alloy material, which has a damping effect on the basis of strength. The damping member 132 is used to absorb vibrations, and the damping member 132 can be made of a rubber material with a relatively good damping effect. As an optional method, the thickness of the rubber material is 0.3 mm-1 mm. In one embodiment, the damping member 132 can be arranged on the outer surface of the support member 131, and can completely cover the support member 131, or can partially cover the support member 131. It can be selected according to the noise reduction requirements of different motors, and is not limited here.

[0041] For example, in one embodiment of the present invention, a plurality of first damping structures 130 are provided at intervals along the circumference of the inner shell 110. In this way, vibration can be absorbed at different positions on the circumference of the housing 100 at the same time, thereby improving the uniformity of noise reduction of the housing 100. Moreover, two adjacent first damping structures 130 are provided at intervals, thereby accelerating the transfer of heat and further improving the heat dissipation effect of the housing 100.

[0042] For example, refer to Figure 2 and Figure 3 In one embodiment of the utility model, the inner shell 110 and the outer shell 120 are spaced apart to form a first flow channel 141, and the first damping structure 130 is spaced apart from the end surface of the inner shell 110 along at least one end in the axial direction of the inner shell 110 to form a second flow channel 142, and the first flow channel 141 and the second flow channel 142 are connected to form a liquid cooling channel.

[0043] Specifically, the motor will generate heat when working, and relying solely on natural heat dissipation cannot meet the heat dissipation requirements. Therefore, it is necessary to dissipate heat from the motor through liquid cooling or oil cooling, timely reduce the surface temperature of the motor, and ensure the normal operation of the motor. To this end, in this embodiment, at least one end of the first damping structure 130 along the axial direction of the inner shell 110 is spaced apart from the end face of the inner shell 110 to form a second flow channel 142, and the first flow channel 141 and the second flow channel 142 are connected to form a liquid cooling channel, and cooling oil or coolant can flow in the liquid cooling channel, and the heat of the motor is taken away by the flow of the coolant or cooling oil. It can be understood that the inner shell 110 has two end faces (i.e., the first end face 111 and the second end face 112) in the axial direction, and the first end face 111 and the second end face 112 both protrude toward the outer shell 120, that is, the inner shell 110 is a structure with protrusions at both ends and a depression in the middle in the axial direction. Since the inner shell 110 and the outer shell 120 are not in direct contact, the first flow channel 141 is formed in the gap between the two. The first damping structure 130 is not in direct contact with one of the two end faces, that is, the first damping structure 130 can be in contact with the first end face 111 and not in contact with the second end face 112, the first damping structure 130 can also be in contact with the second end face 112 and not in contact with the first end face 111, the first damping structure 130 can also be in contact with the first end face 111 and not in contact with the second end face 112, so that a second flow channel 142 is formed between the first damping structure 130 and the non-contacting end face, and the first flow channel 141 and the second flow channel 142 are connected, so that the coolant or cooling oil can flow along the circumference of the casing 100, thereby dissipating the heat of the motor.

[0044] Exemplarily, in one embodiment of the utility model, two adjacent second flow channels 142 are staggered in the circumferential direction of the inner shell 110. That is, if one first damping structure 130 does not contact the first end surface 111 of the inner shell 110, then the first damping structure 130 adjacent to the first damping structure 130 does not contact the second end surface 112 of the inner shell 110, so that the coolant or cooling oil can flow between the two adjacent first damping structures 130 along the axial direction of the inner shell 110, thereby increasing the overall flow path length of the coolant or cooling oil, absorbing more heat, and further improving the heat dissipation effect.

[0045] For example, in one embodiment of the present invention, one end of the first damping structure 130 is embedded in the outer surface of the inner housing 110, and the other end of the first damping structure 130 is plugged into the inner surface of the outer housing 120. In other words, the plug-in limit of the outer housing 120, the inner housing 110 and the first damping structure 130 makes the installation of the outer housing 120 and the inner housing 110 simpler and more reliable, and can also flexibly control the arc width and damping material thickness of the first damping structure 130 to meet the application requirements of different motors.

[0046] For example, refer to Figure 3 In one embodiment of the utility model, the inner shell 110 is provided with a mounting groove 151, the outer shell 120 is provided with a slot 152, one end of the first damping structure 130 is interference fit with the mounting groove 151, and the other end of the first damping structure 130 is interference fit with the slot 152. In this way, the installation of the first damping structure 130 can be achieved through interference fit, which is simple and convenient. It can be understood that during the assembly process, one end of the first damping structure 130 is first embedded in the mounting groove 151 of the inner shell 110. Since the first damping structure 130 and the mounting groove 151 are interference fit, the first damping structure 130 is fixed on the inner shell 110. Then the outer shell 120 is gradually sleeved on the outside of the inner shell 110 along the axial direction. In this process, it is necessary to align the other end of the first damping structure 130 with the slot 152, that is, the other end of the first damping structure 130 slides in the slot 152 until the outer shell 120 is completely sleeved on the outside of the inner shell 110. Since the other end of the first damping structure 130 is interference fit with the slot 152 , after the external force disappears, the outer shell 120 is fixed to the inner shell 110 through the first damping structure 130 , thereby achieving assembly of the inner shell 110 , the outer shell 120 and the first damping structure 130 .

[0047] To achieve the above-mentioned purpose, the present invention provides a motor, referring to Figure 4 and Figure 5 The motor includes a housing 100 and a stator core 200 disposed in the housing 100. The housing 100 is the housing 100 described above. Specifically, the specific structure of the housing 100 refers to the above embodiment. Since the motor adopts all the technical solutions of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0048] For example, refer to Figure 4 and Figure 5 In one embodiment of the utility model, the motor further includes a second damping structure 300, which is disposed between the inner housing 110 and the stator core 200 and connects the inner housing 110 and the stator core 200. The second damping structure 300 can absorb vibrations transmitted from the stator to the inner housing 110. In this embodiment, by providing the first damping structure 130 and the second damping structure 300, more vibrations can be absorbed on the vibration transmission path, further improving the vibration reduction and noise reduction effects. As an optional method, the second damping structure 300 can be made of a material with a damping coefficient greater than 0.1, such as high-damping rubber, high-damping magnesium alloy material, etc., so that more vibrations can be absorbed and the vibration reduction and noise reduction effects can be improved.

[0049] Exemplarily, in one embodiment of the utility model, the second damping structure 300 is at least partially coated on the outer peripheral surface of the stator core 200. Specifically, the second damping structure 300 can be coated on the entire outer surface of the stator core 200, which has a better damping effect, but poor heat dissipation performance and is difficult to position the stator core 200; the second damping structure 300 can also cover part of the outer surface of the stator core 200, which has better heat dissipation performance, can prevent the stator core 200 from slipping, and ensure the precise positioning and heat dissipation performance of the stator core 200. In practical applications, it can be selected according to actual conditions, and is not limited here.

[0050] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the embodiment of the present invention. All equivalent structural changes made by using the description and drawings of the embodiment of the present invention under the inventive concept of the embodiment of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the embodiment of the present invention.

Claims

1. A housing, characterized in that: The housing comprises an inner housing, an outer housing sleeved outside the inner housing, and a first damping structure arranged between the inner housing and the outer housing. The inner housing and the outer housing are spaced apart and connected via the first damping structure.

2. The housing according to claim 1, wherein: The first damping structure includes a support member and a damping member arranged outside the support member, and the damping member connects the inner shell and the outer shell.

3. The housing according to claim 1, wherein: A plurality of the first damping structures are arranged at intervals along the circumferential direction of the inner shell.

4. The housing according to claim 3, wherein: The inner shell and the outer shell are spaced apart to form a first flow channel, at least one end of the first damping structure along the axial direction of the inner shell is spaced apart from the end surface of the inner shell to form a second flow channel, and the first flow channel and the second flow channel are connected to form a liquid cooling channel.

5. The housing according to claim 4, characterized in that: Two adjacent second flow channels are staggered in the circumferential direction of the inner shell.

6. The housing according to claim 1, wherein: One end of the first damping structure is embedded in the outer surface of the inner shell, and the other end of the first damping structure is plugged into the inner surface of the outer shell.

7. The housing according to claim 6, wherein: The inner shell is provided with a mounting groove, the outer shell is provided with a slot, one end of the first damping structure is interference fit with the mounting groove, and the other end of the first damping structure is interference fit with the slot.

8. A motor, characterized in that: The motor comprises a casing and a stator core arranged in the casing, and the casing is the casing as described in any one of claims 1 to 7.

9. The motor according to claim 8, characterized in that The motor further includes a second damping structure, which is disposed between the inner housing and the stator core and connects the inner housing and the stator core.

10. The motor according to claim 9, characterized in that The second damping structure at least partially covers the outer peripheral surface of the stator core.

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