Hollow rotor and motor with same

Abstract

The utility model discloses a hollow rotor and a motor with the same. The technical problems that an existing rotor is poor in heat dissipation effect, low in torque strength and the like are mainly solved. According to the technical scheme, the rotor comprises a rotor body and a rotor assembly, a connecting face is arranged on the side, connected with the rotor assembly, of the rotor body, a cavity is formed in the rotor body, an opening of the cavity is formed in the connecting face, a rotor body positioning groove is formed in the connecting face, and the rotor assembly is arranged in the rotor body positioning groove. The rotor assembly is provided with a rotor assembly first positioning piece matched with the rotor body positioning groove, the rotor body positioning groove is connected with the rotor assembly first positioning piece in a positioning mode, and the rotor body and the rotor assembly form a whole. The motor is mainly applied to motors.

Description

Technical Field

[0001] The utility model relates to a hollow rotor, in particular to a hollow rotor and a motor thereof. Background Art

[0002] Existing motors rarely make improvements to the rotor shaft structure. Some have a small drainage hole on the rotor shaft for drainage, which cannot play a role in heat dissipation. Some have a direct penetration through the rotor shaft, which has a great impact on the axial force and stress strength of the rotor shaft. At the same time, the torque strength at both ends of the rotor is reduced. When the motor works at high power, the rotor is easily scrapped and damaged. Summary of the invention

[0003] The utility model aims to provide a hollow rotor and a motor thereof which have a stable structure, can bear high-strength axial force and torque and have heat dissipation.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a hollow rotor, including a rotor body and a rotor assembly, wherein a connecting surface is provided on one side of the rotor body connected to the rotor assembly, a cavity is hollowed out in the rotor body to reduce the weight of the rotor and also have a certain heat dissipation effect, the opening of the cavity is arranged on the connecting surface to reduce the structural change of the rotor body and ensure the stress strength of the rotor body, a rotor body positioning groove is provided on the connecting surface, the rotor assembly is provided with a rotor assembly first positioning member matched with the rotor body positioning groove, the rotor body positioning groove is positioned and connected with the rotor assembly first positioning member, and the rotor body and the rotor assembly form a whole.

[0005] Furthermore, a contact surface slightly larger than or larger than the rotor body positioning groove is provided at one end of the first positioning member of the rotor assembly away from the rotor body positioning groove, and the contact surface contacts the connecting surface, so that the rotor body and the rotor assembly are matched and connected to form a whole.

[0006] Preferably, the depth of the positioning groove of the rotor body is equal to the thickness of the first positioning member of the rotor assembly, so that the rotor body and the rotor assembly are integrated, the rotor body is evenly stressed, and deformation is not easily generated.

[0007] Furthermore, the rotor body is provided with a first rotor body positioning piece protruding outwardly, preferably, a circular boss with a circular cross-section, and the rotor assembly is provided with a second rotor assembly positioning piece protruding outwardly, preferably, a circular protrusion with a circular cross-section; the first rotor body positioning piece and the second rotor assembly positioning piece are on the same axis, and the first rotor body positioning piece and the second rotor assembly positioning piece are protruding in opposite directions.

[0008] Furthermore, a through hole is provided on the rotor assembly, and the through hole is communicated with the cavity of the rotor body, so as to promote air flow in the cavity of the rotor body and ensure the heat dissipation function of the rotor body.

[0009] Preferably, the rotor body may be a hollow cylinder or a hollow cylindrical body, and the body may also be in the shape of a cylinder with two cylindrical ends and a cylinder in the middle, mainly to reduce the vibration generated when the rotor body rotates.

[0010] Preferably, the cavity opening is connected to the rotor body positioning groove, the size of the cavity opening is smaller than or slightly smaller than the size of the rotor body positioning groove, and the rotor assembly first positioning member of the rotor assembly passes through the connecting surface and is fixedly connected to the cavity opening, so that the rotor body and the rotor assembly become one.

[0011] Furthermore, a positioning hole is provided on the rotor body, and the positioning hole is arranged in the cavity of the rotor body. The positioning hole passes through the rotor body from the cavity of the rotor body to the outside.

[0012] Furthermore, the rotor body is provided with positioning holes, and the positioning holes are arranged in a ring shape on the rotor body.

[0013] Furthermore, the positioning holes include a first positioning hole and a second positioning hole, the first positioning hole is arranged in the cavity of the rotor body, the first positioning hole is arranged from the rotor body cavity through the rotor body to the outside, and the second positioning hole is arranged on the connecting surface of the rotor body, the first positioning holes are arranged in a ring shape on the rotor body cavity, and the second positioning holes are arranged in a ring shape on the connecting surface of the rotor body, and the second positioning holes are arranged in a ring shape larger than the first positioning holes, that is, the distance from the second positioning hole to the center is greater than the distance from the first positioning hole to the center.

[0014] Preferably, the first positioning hole and the second positioning hole are provided with threads in the same direction.

[0015] A motor with a hollow rotor comprises a housing, a stator and the hollow rotor, wherein the hollow rotor further comprises a rotating ring and a connecting plate, wherein the rotating ring is fixed on the hollow rotor, the connecting plate is arranged on the circumference of the rotating ring, the stator is fixedly arranged on the inner side of the housing, and the two ends of the hollow rotor are movably connected to the housing so that the hollow rotor rotates inside the housing.

[0016] Furthermore, the motor also includes a flywheel, and both ends of the hollow rotor are movably connected to extend outward through the shell, and the flywheel is connected to the end surface of the hollow rotor extending outward through the shell, and when the hollow rotor rotates, the flywheel is driven to rotate, or when the flywheel rotates, the hollow rotor is driven to rotate.

[0017] Furthermore, the motor also includes a first flywheel and a second flywheel, wherein the first flywheel and the second flywheel are respectively connected to the two end surfaces of the hollow rotor extending outward through the shell, the first flywheel is positioned and connected by a first positioning piece of the rotor body, and the second flywheel is positioned and connected by a second positioning piece of the rotor assembly.

[0018] The beneficial effects of the utility model are as follows: hollowing out the inside of the rotor can not only reduce the weight but also perform the heat dissipation function of the rotor. At the same time, the rotor body and the rotor assembly are combined into a whole, which does not affect the axial force, torque and strength of the rotor itself. The rotor can also be fixedly connected to an external rotating body such as a flywheel through the inside of the rotor to prevent the external environment from affecting the fixed connection between the rotor and the external rotating body, and prevent the rotor and the external rotating body from loosening, slipping, corroding and oxidizing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the rotor body structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the rotor assembly of the utility model;

[0021] Figure 3 It is a schematic diagram of the rotor structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the rotor of the utility model;

[0023] Figure 5 It is a schematic cross-sectional view of a rotor of the utility model;

[0024] Figure 6 It is a schematic diagram of a flat key of the utility model;

[0025] Figure 7 It is a schematic diagram of the motor structure of the utility model;

[0026] Figure 8 It is a schematic diagram of the motor structure of the utility model.

[0027] In the figure: 1-hollow rotor, 2-stator, 3-housing, 4-first flywheel, 5-second flywheel, 11-rotor body, 12-rotor assembly, 13-cavity, 14-first positioning hole, 15-second positioning hole, 16-limiting ring, 17-convex ring, 18-flat keyway, 41-first flywheel fixing hole, 42-first flywheel positioning hole, 51-second flywheel fixing hole, 52-second flywheel positioning hole, 101-swivel ring, 102-connecting plate, 111-rotor body first positioning piece, 121-rotor assembly body, 122-rotor assembly second positioning piece, 123-rotor assembly through hole. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1, see Figures 1 to 8 The utility model discloses a hollow rotor, which includes a rotor body 11 and a rotor assembly 12. The rotor body 11 is a hollow cylinder, and a cavity 13 is formed inside the rotor body 11. Only one side is provided with an opening, and the cross section of the opening is a stepped circular opening; the rotor assembly 12 is disc-shaped, and the rotor assembly 12 includes a rotor assembly body 121, a rotor assembly rotor assembly second positioning member 122 and a rotor assembly through hole 123. The rotor assembly body 121 is matched and connected with the opening of the rotor body 11; the rotor body 11 is also provided with a convex ring 17 and The limiting ring 16, the convex ring 17 is fixedly connected to the rotating ring 101, the connecting plate 102 is arranged on the peripheral side of the rotating ring 101, and the connecting plate 102 limits the range of movement through the limiting ring 16 and the shell 3; the rotor body 11 is also provided with a first positioning hole 14, a second positioning hole 15 and a first positioning piece 111 of the rotor body, the opening direction of the first positioning hole 14 and the second positioning hole 15 is the same as the opening direction of the rotor body 11, and it is particularly noted that the first positioning hole 14 opens outward from the inner cavity of the rotor body 11, and the first positioning piece 111 of the rotor body extends outward along the axis of the rotor body 11.

[0030] Example 2, see Figures 1 to 8 The utility model discloses a hollow rotor, and a flat keyway 18 is also provided on the rotor body 11 to prevent the rotor body 11 from being eccentric due to unbalanced force; the rest is the same as any other embodiment of the utility model or a combination of more than two embodiments.

[0031] Example 3, see Figures 1 to 8The utility model discloses a motor with a hollow rotor, comprising a housing 3, a stator 2 and a hollow rotor 1, wherein the hollow rotor 1 comprises a rotating ring 101, a connecting plate 102 and a rotor body 11, wherein the rotor body 11 is provided with a first positioning hole 14 and a rotor body first positioning member 111, wherein the rotating ring 101 is fixed on the hollow rotor 1, wherein the connecting plate 102 is arranged on the circumference of the rotating ring 101, wherein the stator 2 is fixedly arranged on the inner side of the housing 3, wherein both ends of the hollow rotor 1 are movably connected to the housing 3, so that the hollow rotor 1 rotates inside the housing 3; wherein the motor with a hollow rotor further comprises a first flywheel 4, wherein the first flywheel 4 A first flywheel positioning hole 42 and a first flywheel fixing hole 41 are provided on the hollow rotor 1. The first flywheel 4 is positioned and connected to the first positioning piece 111 of the rotor body on the hollow rotor 1 through the first flywheel positioning hole 42. The first flywheel fixing hole 41 corresponds to the first positioning hole 14. Eight bolts are provided to connect the first flywheel fixing hole 41 and the first positioning hole 14. The bolts are fixed through the first positioning hole 14 and the first flywheel fixing hole 41, so that the first flywheel 4 and the hollow rotor 1 are firmly fixed together to form a whole, so that the first flywheel 4 and the hollow rotor 1 rotate together. The rest is the same as any other embodiment of the utility model or a combination of more than two embodiments.

[0032] Example 4, see Figures 1 to 8 The utility model discloses a motor with a hollow rotor, comprising a housing 3, a stator 2 and a hollow rotor 1, wherein the hollow rotor 1 comprises a rotating ring 101, a connecting plate 102 and a rotor assembly 12, wherein a second positioning hole 15 is arranged on the rotor body 11, and a rotor assembly body 121, a rotor assembly rotor assembly second positioning member 122 and a rotor assembly through hole 123 are arranged on the rotor assembly 12, wherein the rotating ring 101 is fixed on the hollow rotor 1, the connecting plate 102 is arranged on the peripheral side of the rotating ring 101, the stator 2 is fixedly arranged on the inner side of the housing 3, and the two ends of the hollow rotor 1 are movably connected to the housing 3, so that the hollow rotor 1 rotates inside the housing 3; the motor with a hollow rotor The utility model further comprises a second flywheel 5, on which a second flywheel positioning hole 52 and a second flywheel fixing hole 51 are provided, and the second flywheel 5 is positioned and connected with the rotor assembly second positioning member 122 on the hollow rotor 1 through the second flywheel positioning hole 52, and the second flywheel fixing hole 51 corresponds to the second positioning hole 15, and 8 bolts are provided to connect the second flywheel fixing hole 51 and the second positioning hole 15, and the bolts are fixed through the second flywheel fixing hole 51 and the second positioning hole 15, so that the second flywheel 5 and the hollow rotor 1 are firmly fixed together to form a whole, so that the second flywheel 5 and the hollow rotor 1 rotate together; the rest is the same as any other embodiment or a combination of two or more embodiments of the utility model.

[0033] Example 5, see Figures 1 to 8The utility model discloses a motor with a hollow rotor, comprising a housing 3, a stator 2 and a hollow rotor 1, wherein the hollow rotor 1 comprises a rotating ring 101, a connecting plate 102, a rotor body 11 and a rotor assembly 12, wherein the rotor body 11 is provided with a first positioning hole 14, a second positioning hole 15 and a rotor body first positioning member 111, wherein the rotor assembly 12 is provided with a rotor assembly body 121, a rotor assembly rotor assembly second positioning member 122 and a rotor assembly through hole 123, wherein the rotating ring 101 is fixed on the hollow rotor 1, the connecting plate 102 is arranged on the circumference of the rotating ring 101, the stator 2 is fixedly arranged on the inner side of the housing 3, and the two ends of the hollow rotor 1 are movably connected to the housing 3, so that the hollow rotor 1 rotates inside the housing 3; the motor with a hollow rotor further comprises a first flywheel 4 and a second flywheel 5, wherein the first flywheel 4 is provided with a first flywheel positioning hole 42 and a first flywheel fixing hole 41, and the first flywheel 4 is connected to the hollow rotor 1 through the first flywheel positioning hole 42 The first flywheel fixing hole 41 corresponds to the first positioning hole 14, and 8 bolts are provided to connect the first flywheel fixing hole 41 and the first positioning hole 14, and the bolts are fixed to the first flywheel fixing hole 41 through the first positioning hole 14; the second flywheel 5 is provided with a second flywheel positioning hole 52 and a second flywheel fixing hole 51, and the second flywheel 5 is positioned and connected to the rotor assembly rotor assembly second positioning member 122 on the hollow rotor 1 through the second flywheel positioning hole 52, and the second flywheel fixing hole 51 corresponds to the second positioning hole 15, and 8 bolts are provided to connect the second flywheel fixing hole 51 and the second positioning hole 15, and the bolts are fixed to the second flywheel fixing hole 51 and the second positioning hole 15, and the first flywheel 4 and the second flywheel 5 are fixed to the hollow rotor 1 firmly together to form a whole, so that the first flywheel 4 and the second flywheel 5 rotate together with the hollow rotor 1; the rest is the same as any other embodiment or a combination of more than two embodiments of the utility model.

[0034] Example 6, see Figures 1 to 8 The utility model discloses a motor with a hollow rotor, including a shell 3 and a stator 2. The shell 3 is made of aluminum alloy, and a cooling water channel with a straight-through structure is arranged in the wall of the shell 3. The stator 2 is formed by stacking punched sheets of steel sheets, which can eliminate the influence of tooth harmonics on the electromotive force waveform.

[0035] In conjunction with the drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and does not serve as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] Unless otherwise specified, the relative arrangement of the components and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present application. At the same time, it should be understood that for ease of description, the structures, proportions, sizes, etc. shown in the drawings are only used to match the contents disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions that can be implemented in this application. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that can be produced by this application and the purpose that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0039] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

Claims

1. A hollow rotor, characterized in that: The invention comprises a rotor body and a rotor assembly. The rotor body has a connecting surface on one side connected to the rotor assembly. The rotor body is hollowed out to form a cavity. The opening of the cavity is arranged on the connecting surface. A rotor body positioning groove is arranged on the connecting surface. The rotor assembly is provided with a rotor assembly first positioning piece matched with the rotor body positioning groove. The rotor body positioning groove is positioned and connected with the rotor assembly first positioning piece. The rotor body and the rotor assembly form a whole.

2. The hollow rotor according to claim 1, characterized in that: The rotor body is provided with a first rotor body positioning member protruding outwardly, and the rotor assembly is provided with a second rotor assembly positioning member protruding outwardly. The first rotor body positioning member and the second rotor assembly positioning member are on the same axis, and the protruding directions of the first rotor body positioning member and the second rotor assembly positioning member are opposite.

3. The hollow rotor according to claim 2, characterized in that: The cavity opening is connected to the rotor body positioning groove, the size of the cavity opening is smaller than the size of the rotor body positioning groove, and the rotor assembly first positioning member of the rotor assembly passes through the connecting surface and is fixedly connected to the cavity opening.

4. The hollow rotor according to claim 1, characterized in that: The rotor body is provided with a positioning hole, the positioning hole is arranged in the cavity of the rotor body, and the positioning hole passes through the rotor body from the cavity of the rotor body to the outside.

5. The hollow rotor according to claim 4, characterized in that: The positioning holes include a first positioning hole and a second positioning hole, the first positioning hole is arranged in the cavity of the rotor body, the first positioning hole is arranged from the rotor body cavity through the rotor body to the outside, and the second positioning hole is arranged on the connecting surface of the rotor body. The first positioning holes are arranged in a ring shape on the rotor body cavity, and the second positioning holes are arranged in a ring shape on the connecting surface of the rotor body.

6. The hollow rotor according to claim 4 or 5, characterized in that: The positioning holes are arranged in a ring shape on the rotor body cavity or in a ring shape on the rotor body.

7. A motor with a hollow rotor, characterized in that: It comprises a shell, a stator and the hollow rotor as claimed in any one of claims 1 to 6, wherein the hollow rotor further comprises a rotating ring and a connecting plate, wherein the rotating ring is fixed on the hollow rotor, the connecting plate is arranged on the circumferential side of the rotating ring, and the stator is fixed on the inner side of the shell.

8. The motor with a hollow rotor according to claim 7, characterized in that: The motor with a hollow rotor also includes a flywheel. Both ends of the hollow rotor are movably connected and extend outward through the shell. The flywheel is connected to the end surface of the hollow rotor extending outward through the shell. When the hollow rotor rotates, the flywheel is driven to rotate, or when the flywheel rotates, the hollow rotor is driven to rotate.

9. The motor with a hollow rotor according to claim 8, characterized in that: The flywheel comprises a first flywheel and a second flywheel, wherein the first flywheel and the second flywheel are respectively connected to two end surfaces of the hollow rotor extending outward through the shell.

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