Lightweight rotor mechanism and motor

Abstract

According to the lightweight rotor mechanism and the motor provided by the invention, the rotor iron core is hollow, the inner ring and the rotor yoke are connected through the spokes, rotation torque transmission between the rotor iron core and the rotor yoke is carried out through the spokes, due to the hollow arrangement, the rotational inertia of the rotor is reduced, and the magnetic bridge is additionally arranged on the inner surface of the rotor iron core, so that the rotation torque of the rotor is reduced. The rotor yoke is prevented from being too thin, flux density saturation between two adjacent magnets is prevented, and the magnetic field performance of the rotor is improved. The motor adopts a lightweight rotor mechanism in the form of hollow spokes, so that the weight of the rotor is reduced, the overall weight of the motor is also reduced, the weight of the motor is further reduced, and meanwhile, the magnetic field performance is also improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a lightweight rotor mechanism and an electric machine. BACKGROUND

[0002] The rotor of an electric machine and the stator of an electric machine are core components for realizing the conversion of electric energy and mechanical energy, and the rotor of an electric machine is a rotating component in the electric machine.

[0003] Current electric machine products on the market gradually further require lightweight, and there is a large space for lightweight of electric machines on the market. For example, the current lightweight means of a surface-mounted magnet rotor core is simply via-hole hollowing, and further consideration based on the magnetic field and structure is not made.

[0004] The existing lightweight processing of electric machines does not consider the magnetic field and structure, resulting in a decrease in the magnetic field performance of the existing electric machines, and difficulty in meeting the market demand. CONTENT OF THE UTILITY MODEL

[0005] The technical problem to be solved by the present application is that the existing lightweight processing of electric machines does not consider the magnetic field and structure, resulting in a decrease in the magnetic field performance of the existing electric machines, and difficulty in meeting the market demand.

[0006] In order to solve the above technical problem or at least partially solve the above technical problem, the present application provides a lightweight rotor mechanism and an electric machine.

[0007] In a first aspect, the utility model discloses a lightweight rotor mechanism, which comprises a rotor core and a magnet, wherein the magnet is installed on the outer surface of the rotor core.

[0008] The rotor core comprises an inner ring, a rotor yoke, a spoke, and a magnetic bridge, wherein the inner ring, the rotor yoke, and the spoke are integrally formed, the inner ring and the rotor yoke are concentrically arranged, the space between the inner ring and the rotor yoke is hollow, the two ends of the spoke are connected to the inner ring and the rotor yoke respectively, and the magnetic bridge is arranged on the surface of the rotor yoke close to the inner ring.

[0009] Preferably, all the spokes arranged on the rotor core are uniformly arranged, and the space between the inner ring and the rotor yoke is divided according to the equal ratio of the number of spokes.

[0010] Preferably, the number of spokes arranged is less than or equal to half of the number of magnets arranged.

[0011] Preferably, the utility model comprises an output shaft.

[0012] The inner ring is provided with a through hole, the output shaft passes through the through hole, and the inner diameter of the through hole matches the outer diameter of the output shaft.

[0013] Preferably, the magnetic bridge or the spoke is arranged between two adjacent magnets, and the magnetic bridge is arranged between any two adjacent spokes.

[0014] Preferably, the number of the magnetic bridges arranged is equal to the sum of the number of the spokes and the number of the magnets.

[0015] Preferably, the shape of one of the magnetic bridges is rectangular, triangular, petal-shaped or any other smooth transition form.

[0016] Preferably, the outer surface of the rotor core is provided with at least two magnet clamps, and the magnets are clamped between adjacent magnet clamps.

[0017] Preferably, the magnets are adhered to the outer surface of the rotor core by glue.

[0018] In a second aspect, the utility model discloses a motor which comprises the lightweight rotor mechanism.

[0019] Compared with the prior art, the above technical scheme provided by the application has the following advantages:

[0020] The lightweight rotor mechanism and the motor provided by the application, wherein the lightweight rotor mechanism, the rotor core is hollow, the inner ring and the rotor yoke are connected through the spoke, and the rotation torque is transmitted between the two through the spoke, and due to the hollow arrangement, the moment of inertia of the rotor is reduced, the inner surface of the rotor core is additionally provided with the magnetic bridge, the thickness of the rotor yoke is prevented from being too thin, the magnetic density saturation between the two adjacent magnets is prevented, and the magnetic field performance of the rotor is improved.

[0021] The motor adopts the lightweight rotor mechanism in the form of the hollow spoke, the weight of the rotor is reduced, the overall weight of the motor is also reduced, the weight of the motor is further reduced, and the magnetic field performance is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated into the specification and forming a part thereof, show embodiments consistent with the present utility model, and together with the specification serve to explain the principles of the present utility model.

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The structure diagram of the lightweight rotor mechanism provided by the application Figure One ;

[0025] Figure 2 A schematic diagram of a lightweight rotor mechanism provided in this application Figure Two ;

[0026] Figure 3 A schematic diagram of the rotor core of a lightweight rotor mechanism provided in this application. Figure One ;

[0027] Figure 4 A schematic diagram of the rotor core of a lightweight rotor mechanism provided in this application. Figure Two .

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Lightweight rotor mechanism;

[0030] 11. Rotor core; 111. Inner ring; 112. Rotor yoke; 113. Spokes; 114. Magnetic bridge; 115. Magnetic claws;

[0031] 12. Magnet;

[0032] 13. Output shaft. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Firstly, see Figures 1-4 This utility model discloses a lightweight rotor mechanism 1, including an output shaft 13, a rotor core 11 and a magnet 12. The magnet 12 is installed on the outer surface of the rotor core 11, and the output shaft 13 passes through the rotor core 11.

[0035] The rotor core 11 includes an inner ring 111, a rotor yoke 112, spokes 113, and a magnetic bridge 114. The inner ring 111, the rotor yoke 112, and the spokes 113 are integrally formed. The inner ring 111 and the rotor yoke 112 are concentrically arranged, and there is a hollow space between the inner ring 111 and the rotor yoke 112. The two ends of the spokes 113 are respectively connected to the inner ring 111 and the rotor yoke 112. The magnetic bridge 114 is disposed on the surface of the rotor yoke 112 near the inner ring 111.

[0036] The inner ring 111 has a through hole at its center, through which the output shaft 13 passes, and the inner diameter of the through hole matches the outer diameter of the output shaft 13.

[0037] Specifically, the rotor core 11 is hollowly arranged, the inner ring 111 and the rotor yoke 112 are connected through the spokes 113, and the rotational torque transmission is performed between the two through the spokes 113. Due to the hollow arrangement, the moment of inertia of the rotor is reduced. The inner surface of the rotor core 11 is additionally provided with a magnetic bridge 114, so as to avoid that the thickness of the rotor yoke 112 is too thin, prevent the magnetic density saturation between the two adjacent magnets 12, and improve the magnetic field performance of the rotor. That is, the spokes 113 are hollowly arranged, and the rotor yoke 112 between the spokes 113 is provided with the magnetic bridge 114. The arrangement of the rotor core 11 not only reduces the overall weight of the rotor mechanism, but also avoids the magnetic density saturation of the two adjacent magnets 12.

[0038] The magnet 12 is adhered to the outer surface of the rotor core 11 by glue, that is, the magnet 12 is attached to the rotor core 11, so as to avoid that the magnet 12 falls off from the rotor core 11.

[0039] The spokes 113 arranged on the rotor core 11 are uniformly arranged, and the space between the inner ring 111 and the rotor yoke 112 is divided according to the number of the spokes 113.

[0040] It can be understood that there is a hollow space between the rotor core 11 and the inner ring 111. The spokes 113 connect the rotor core 11 and the inner ring 111, so that the two can transmit torque, and the output shaft 13 outputs corresponding torque. The rotor core 11 realizes large-area hollowing, which greatly reduces the overall weight of the rotor mechanism.

[0041] The number of the spokes 113 is less than or equal to half of the number of the magnets 12. That is, the number of the spokes 113 is 1 / 2, 1 / 3, 1 / 4, etc. of the number of the magnets 12, which can be set according to actual conditions. In the embodiment, the number of the spokes 113 is half of the number of the magnets 12.

[0042] Optionally, the pole number of the rotor core 11 can be set to 6 poles, 8 poles, 10 poles, 12 poles, 14 poles, etc. The pole number of the rotor core 11 can be adjusted according to specific requirements.

[0043] The magnetic bridge 114 or the spoke 113 is arranged between two adjacent magnets 12, and the magnetic bridge 114 is arranged between any two adjacent spokes 113.

[0044] It can be understood that the magnets 12 are equidistantly distributed on the outer surface of the rotor core 11, the spokes 113 and the magnetic bridges 114 are arranged on the inner surface of the rotor core 11, the magnetic bridges 114 correspond to the rotor yokes 112 between adjacent spokes 113, and the arrangement of the magnetic bridges 114 can reduce the number of the spokes 113, reduce the weight of the rotor core 11, and in addition, the magnetic bridges 114 can compensate for the removal of the spokes 113 and increase the magnetic conductive capacity at the positions.

[0045] Since the magnetic field adjacent to the rotor yoke 112 is the highest magnetic field strength position of the rotor, by arranging the magnetic bridges 114 and the spokes 113, the rotor yoke 112 can be widened, the magnetic field density at the position can be reduced, and the weight of the rotor core 11 can be reduced to balance the performance and lightweight requirements.

[0046] As an embodiment, the number of the magnetic bridges 114 and the number of the spokes 113 are equal to the number of the magnets 12. The arrangement of the spokes 113 can reduce the magnetic field density at the position, and in addition, the magnetic bridges 114 can compensate for the removal of the spokes 113 and increase the magnetic conductive capacity at the positions.

[0047] Optionally, the shape of one of the magnetic bridges 114 is rectangular, triangular, petal-shaped, or any other smooth transition form.

[0048] The outer surface of the rotor core 11 is provided with at least two magnet clamping jaws 115, and the adjacent magnet clamping jaws 115 clamp the magnets 12.

[0049] Specifically, the magnet clamping jaws 115 are arranged in a dovetail groove shape, and two adjacent magnet clamping jaws 115 clamp the magnets 12 as a whole to prevent the magnets 12 from being thrown out due to high rotation speed.

[0050] In a second aspect, the utility model discloses a motor which comprises the lightweight rotor mechanism 1 and the balance mud, and the balance mud is arranged on the surface of the lightweight rotor mechanism 1.

[0051] Specifically, the motor adopts the lightweight rotor mechanism 1 in the form of a hollow spoke 113, which reduces the weight of the rotor, so that the overall weight of the motor is also reduced. Since the weight of the rotor mechanism is reduced, the moment of inertia of the rotor is also reduced. At the same time, the magnetic field performance is also improved. The lightweight rotor mechanism 1 is designed in the shape of a bread, which reduces the motor tooth slot torque.

[0052] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0053] In the description of the utility model, it is understood that the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the directions or positional relationships shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0054] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0055] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0056] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and oblique above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and oblique below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0057] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0058] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, these modifications and variations of the present application are intended to be included within the scope of the claims of the present application and equivalents thereof. Therefore, the present application is intended to include these modifications and variations.

[0059] The above is a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be included in 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 lightweight rotor mechanism characterized by comprising: The rotor core comprises a rotor core and a magnet, and the magnet is installed on the outer surface of the rotor core. The rotor core comprises an inner ring, a rotor yoke, a spoke, and a magnetic bridge. The inner ring, the rotor yoke, and the spoke are integrally formed. The inner ring and the rotor yoke are concentrically arranged. The space between the inner ring and the rotor yoke is hollow. The spoke is connected to the inner ring and the rotor yoke at both ends. The magnetic bridge is arranged on the surface of the rotor yoke close to the inner ring.

2. The lightweight rotor mechanism according to claim 1, characterized by All the spokes arranged on the rotor core are uniformly arranged. The space between the inner ring and the rotor yoke is divided according to the number of spokes in equal proportion.

3. The lightweight rotor mechanism according to claim 1, characterized by The number of spokes arranged is less than or equal to half the number of magnets arranged.

4. The lightweight rotor mechanism according to claim 1, characterized by The output shaft is arranged. The inner ring is provided with a through hole, and the output shaft passes through the through hole. The inner diameter of the through hole matches the outer diameter of the output shaft.

5. The lightweight rotor mechanism according to claim 1, characterized by The magnetic bridge or the spoke is arranged between two adjacent magnets, and the magnetic bridge is arranged between any two adjacent spokes.

6. The lightweight rotor mechanism according to claim 1, characterized by The number of magnetic bridges arranged plus the number of spokes arranged is equal to the number of magnets.

7. The lightweight rotor mechanism according to claim 1, characterized by The shape of one magnetic bridge is rectangular, triangular, petal-shaped, or any other smooth transition form.

8. The lightweight rotor mechanism according to claim 1, characterized by The outer surface of the rotor core is provided with at least two magnet clamps, and the adjacent magnet clamps hold the magnet.

9. The lightweight rotor mechanism according to claim 1, characterized by The magnet is adhered to the outer surface of the rotor core by glue.

10. An electric machine characterized by The lightweight rotor mechanism of any one of claims 1-9 is provided.

Images