Rotor and motor

Abstract

The utility model relates to a rotor and a motor. The rotor comprises a rotor shaft, a rotor support and a rotor iron core. The rotor bracket comprises an inner pipe part, an outer pipe part and a connecting part connected between the inner pipe part and the outer pipe part; the inner pipe part of the rotor bracket is arranged on the rotor shaft in a sleeving manner, circumferentially limited with the rotor shaft through a circumferential limiting structure and axially limited with the rotor shaft through an axial limiting structure; the rotor core is sleeved on the outer tube portion of the rotor support, a first end of the outer tube portion is provided with a limiting baffle ring in a protruding mode, the limiting baffle ring abuts against the first end of the rotor core, a second end of the outer tube portion is provided with a concave annular groove, an elastic limiting clamping ring is detachably connected in the annular groove, and the limiting clamping ring is provided with a fracture. The limiting clamping ring abuts against the second end of the rotor iron core. According to the utility model, the limiting snap ring is used for limiting, the weight is reduced, the light weight of a carried vehicle is realized, and the limiting snap ring is directly clamped on the rotor bracket, so that the overall occupied space of the rotor can be reduced.

Description

Technical Field

[0001] The present application relates to the field of rotor technology, and in particular to a rotor and a motor. Background Art

[0002] The rotor is usually composed of a rotor shaft, a rotor bracket and a rotor core, wherein the rotor core is coaxially sleeved on the rotor bracket. In order to avoid relative axial movement between the rotor core and the rotor bracket, the rotor core needs to be fastened to the rotor bracket. At present, the rotor core is mostly fixed by setting end plate pressure rings at both ends of the rotor bracket, and the rotor core is clamped and fixed by two end plate pressure rings. The end plate pressure rings are mainly fixed to the rotor bracket by bolts. However, this structural design fastened by bolts will not only increase the weight and cost of the rotor, but also increase the structure. Utility Model Content

[0003] Based on this, the utility model provides a rotor and a motor to improve the problems of increased weight, increased cost and less compact structure caused by limiting the rotor core by end plate pressure rings and bolts in the prior art.

[0004] In one aspect, the utility model provides a rotor, comprising a rotor shaft, a rotor support and a rotor core;

[0005] The rotor support comprises an inner tube portion, an outer tube portion and a connecting portion connected between the inner tube portion and the outer tube portion;

[0006] The inner tube portion of the rotor support is sleeved on the rotor shaft, and is circumferentially limited with the rotor shaft by a circumferential limiting structure and axially limited by an axial limiting structure;

[0007] The rotor core is sleeved on the outer tube portion of the rotor bracket, the first end protrusion of the outer tube portion is provided with a limit ring abutting against the first end of the rotor core, the second end of the outer tube portion is provided with an inwardly concave annular groove, an elastic limit clamping ring is detachably connected in the annular groove, the limit clamping ring is provided with a break, and the limit clamping ring abuts against the second end of the rotor core.

[0008] In one of the embodiments, the limiting clamp ring includes a clamping portion that is clamped with the annular groove and a limiting portion that abuts against the rotor core, and the limiting portion is located outside the annular groove.

[0009] In one embodiment, the cross-section of the annular groove is a rectangle, and the cross-section of the clamping portion is a rectangle matching the cross-section of the annular groove.

[0010] In one of the embodiments, the cross-section of the annular groove is a quadrilateral that is wide inside and narrow outside, and the cross-section of the clamping portion is a quadrilateral that matches the cross-section shape of the annular groove.

[0011] In one embodiment, the cross section of the annular groove is an isosceles trapezoid or a right-angled trapezoid.

[0012] In one of the embodiments, at least one end of the fracture of the limiting clamp is provided with a notch, and the notch extends inward from a position inside the outer circumference of the limiting clamp to the inner circumference of the limiting clamp.

[0013] In one of the embodiments, a second end of the rotor core protrudes axially outward to be provided with a limit block, and the limit block is located in the fracture.

[0014] In one of the embodiments, the axial limiting structure includes a shoulder fixedly disposed on the rotor shaft and a locking sleeve detachably connected to the rotor shaft, the locking sleeve is threadedly connected to the rotor shaft, and the locking sleeve and the shoulder clamp and fix the inner tube portion of the rotor support.

[0015] In one embodiment, the circumferential limiting structure includes a connecting key, and a keyway is provided on both the rotor shaft and the rotor support, a part of the connecting key is located in the keyway of the rotor shaft, and another part is located in the keyway of the rotor support; or

[0016] The circumferential limiting structure includes an internal spline arranged in the inner hole of the inner tube portion of the rotor support and an external spline arranged on the surface of the rotor shaft and matching with the internal spline.

[0017] On the other hand, the utility model further provides a motor, which includes the rotor of any one of the above embodiments.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model utilizes a limiting clamping ring to replace the existing end plate pressure ring and bolts, so the weight of the rotor is reduced, the vehicle carrying it is lightweight, and the step of tightening bolts is saved, so the production rhythm of the work station can be accelerated and the production efficiency can be improved. Moreover, the limiting clamping ring is directly clamped on the rotor bracket, so the original occupied space of the rotor bracket can be fully utilized. Compared with the existing method of adding an end plate pressure ring on the outer side of the rotor bracket, the structure is more compact and the overall occupied space of the rotor can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of a rotor in one embodiment;

[0021] Figure 2 is a cross-sectional view of a rotor in one embodiment;

[0022] Figure 3 for Figure 2Sectional view of AA in the middle;

[0023] Figure 4 It is a schematic diagram of the structure of a rotor support and a limiting clamp ring of a rotor in an embodiment.

[0024] The figure marks in the drawings of the specification include: rotor shaft 1, shaft shoulder 101, locking sleeve 102, connecting key 103, rotor bracket 2, inner tube 201, outer tube 202, connecting part 203, limit ring 2021, ring groove 2022, rotor core 3, limit block 301, limit clamping ring 4, clamping part 401, limit part 402, fracture 403, notch 404. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0027] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0028] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] See also Figures 1 to 4 , the embodiment of the utility model discloses a rotor, which includes a rotor shaft 1, a rotor support 2 and a rotor core 3;

[0030] The rotor support 2 includes an inner tube portion 201, an outer tube portion 202, and a connecting portion 203 connected between the inner tube portion 201 and the outer tube portion 202;

[0031] The inner tube portion 201 of the rotor support 2 is sleeved on the rotor shaft 1, and is circumferentially limited with the rotor shaft 1 by a circumferential limiting structure and axially limited by an axial limiting structure;

[0032] The rotor core 3 is sleeved on the outer tube portion 202 of the rotor bracket 2. The first end of the outer tube portion 202 is convexly provided with a limit ring 2021 that abuts against the first end of the rotor core 3. The second end of the outer tube portion 202 is provided with a concave annular groove 2022. An elastic limit clamp 4 is detachably connected in the annular groove 2022, and the limit clamp 4 abuts against the second end of the rotor core 3.

[0033] The rotor provided in this embodiment limits the first end of the rotor core 3 by setting a limit ring 2021 at the first end of the outer tube 202, limits the second end of the rotor core 3 by setting an annular groove 2022 at the second end of the outer tube 202, and limits the second end of the rotor core 3 by setting a limit snap ring 4 in the annular groove 2022, so that the rotor core 3 can be clamped and fixed on the rotor bracket 2 by the limit ring 2021 and the limit snap ring 4. The utility model uses the limit snap ring 4 to replace the existing end plate pressure ring and bolts, the weight of the rotor is reduced, the vehicle carrying it is lightweight, and the step of tightening the bolts is saved, which can speed up the production cycle of the work station and improve the production efficiency. Moreover, the limit snap ring 4 is directly clamped on the rotor bracket 2, which can make full use of the original space of the rotor bracket 2. Compared with the existing method of adding an end plate pressure ring on the outer side of the rotor bracket 2, its structure is more compact and the overall occupied space of the rotor can be reduced.

[0034] The various components of the rotor provided in the embodiment of the utility model are described in detail below with reference to the accompanying drawings.

[0035] See also Figure 2 In this embodiment, the rotor shaft 1 is a shaft structure with multiple journals that is processed by casting or turning, and the diameter of each journal of the rotor shaft 1 decreases from the middle of the rotor shaft 1 to both ends, so that it constitutes a stepped shaft, which is convenient for installing other components on the rotor shaft 1 according to the stepped levels when installing the rotor.

[0036] Each journal section of the rotor shaft 1 has at least one mounting section for mounting the rotor support 2. Figure 2 The rotor support 2 includes an inner tube portion 201, an outer tube portion 202 and a connecting portion 203 connected between the inner tube portion 201 and the outer tube portion 202, wherein the inner tube portion 201 is a circular tube structure, and the inner diameter of the inner tube portion 201 matches the diameter of the mounting section, so that the inner tube portion 201 can be sleeved on the mounting section of the rotor shaft 1. Specifically, there is a clearance fit between the inner tube portion 201 and the mounting section.

[0037] In this embodiment, the inner tube portion 201 of the rotor support 2 and the rotor shaft 1 are also circumferentially limited and axially limited by a circumferential limiting structure and an axial limiting structure to ensure that the rotor support 2 and the rotor shaft 1 can stably and effectively transmit torque.

[0038] Specifically, see Figure 2 The axial limiting structure includes a shaft shoulder 101 and a locking sleeve 102. The shaft shoulder 101 is integrally formed on one side of the mounting section. Figure 2 In the example, it is the right side of the installation section, the diameter of the shaft shoulder 101 is larger than the diameter of the installation section, and when the inner tube 201 of the rotor bracket 2 is sleeved on the installation section, the right end of the inner tube 201 abuts against the left side of the shaft shoulder 101. The locking sleeve 102 is detachably connected to the other side of the installation section. Specifically, the portion of the rotor shaft 1 located on the left side of the installation section is provided with a locking section, the diameter of the locking section is equal to or smaller than the diameter of the installation section, and the surface of the locking section is provided with an external thread, and the locking sleeve 102 is a threaded sleeve and is threadedly connected to the locking section on the left side of the installation section.

[0039] The axial limiting structure of the above-mentioned structural design can rotate the locking sleeve 102 to the right to make the right end of the locking sleeve 102 tightly abut against the left end of the inner tube 201, so that the inner tube 201 of the rotor bracket 2 is clamped and fixed on the rotor shaft 1 through the shaft shoulder 101 and the locking sleeve 102, thereby realizing the axial limiting of the rotor bracket 2. Compared with the existing interference fit method, this axial limiting method is more convenient to install and disassemble, and is more conducive to the disassembly maintenance or replacement of the rotor bracket 2 or the rotor shaft 1.

[0040] See also Figure 2 The circumferential limiting structure includes a connecting key 103, which is arranged in a rectangular parallelepiped shape. A rectangular keyway is arranged on both the rotor shaft 1 and the rotor bracket 2, and the notches of the keyways on the rotor shaft 1 and the rotor bracket 2 are arranged opposite to each other, so that when the rotor bracket 2 is sleeved on the rotor shaft 1, the two keyways can be connected to each other to form a space for placing the connecting key 103. When the connecting key 103 is installed in the keyways on the rotor bracket 2 and the rotor shaft 1, a part of the connecting key 103 is located in the keyway of the rotor shaft 1, and the other part is located in the keyway of the rotor bracket.

[0041] The circumferential limiting structure of the above structural design can prevent the rotor bracket 2 and the rotor shaft 1 from rotating relative to each other through the cooperation of the connecting key 103 and the keyway, thereby achieving circumferential limiting of the rotor bracket 2 and being able to stably and effectively transmit torque.

[0042] In other embodiments, the circumferential limiting structure may also be a spline structure provided between the rotor shaft 1 and the rotor support 2. For example, an internal spline is provided in the inner hole of the inner tube portion 201 of the rotor support 2, and an external spline matching the internal spline is provided on the surface of the mounting section of the rotor shaft 1. In this way, the circumferential limiting of the rotor support 2 and the rotor shaft 1 can also be achieved through the spline structure, so as to ensure that the torque can be stably and effectively transmitted between the rotor support 2 and the rotor shaft 1.

[0043] See also Figure 2 The outer tube portion 202 of the rotor support 2 is also a circular tube structure, and is coaxially connected to the outer side of the outer tube portion 202 through the connecting portion 203. Figure 1 and Figure 2 The connecting portion 203 includes a plurality of connecting plates, which are evenly distributed circumferentially between the outer circumference of the inner tube portion 201 and the inner circumference of the outer tube portion 202, and the connecting plates and the inner tube portion 201 and the outer tube portion 202 can be connected by welding or integral molding to ensure that the inner tube portion 201 and the outer tube portion 202 are connected as a whole.

[0044] See also Figure 1 and Figure 2 In this embodiment, the rotor core 3 is sleeved on the outer tube 202 of the rotor support 2, and is axially limited by a limit ring 2021 arranged at the first end of the outer tube 202 and a limit clamp 4 arranged at the second end of the outer tube 202. The first end of the outer tube 202 can be understood as Figure 2 The left end of the orientation shown, the second end can be understood as Figure 2 Right end of the orientation shown.

[0045] Specifically, see Figure 4 The stop ring 2021 is a circular ring structure, which is fixed to the first end of the outer tube 202 by integral molding or welding, and the stop ring 2021 is convex outwardly arranged along the radial direction as a whole, that is, the outer diameter of the stop ring 2021 is larger than the outer diameter of the outer tube 202. Figure 2 When the rotor core 3 is sleeved on the outer tube 202, the first end of the rotor core 3 abuts against the limiting ring 2021, so that the axial limiting of the rotor core 3 in the direction of the first end can be achieved.

[0046] In this embodiment, the outer circumferential surface of the second end of the outer tube 202 is provided with an annular groove 2022 which is recessed inwardly in the radial direction, and the limiting clamp ring 4 is detachably arranged in the annular groove 2022 to limit the rotor core 3 at the second end of the outer tube 202. For example, see Figure 4The limiting clamp ring 4 is a circular ring structure matching the annular groove 2022, and the inner diameter of the limiting clamp ring 4 is smaller than the outer diameter of the outer tube 202, and the outer diameter of the limiting clamp ring 4 is larger than the outer diameter of the outer tube 202. Figure 2 When the inner ring of the limiting clamp ring 4 is clamped in the annular groove 2022 , the outer ring of the limiting clamp ring 4 is located outside the outer tube portion 202 , so as to limit the position of the rotor core 3 .

[0047] Specifically, see Figure 3 In this embodiment, the limiting clamp ring 4 is divided into two parts according to the function, namely, the clamping portion 401 clamped to the annular groove 2022 and the limiting portion 402 abutting against the rotor core 3. Among them, the shape of the clamping portion 401 needs to match the shape of the annular groove 2022, and the shape of the limiting portion 402 is not limited, as long as it has a limiting surface abutting against the rotor core 3.

[0048] For example, see Figure 2 In this embodiment, the cross-sectional shape of the annular groove 2022 is a rectangle, and the cross-sectional shape of the limiting clamp ring 4 is also a rectangle, so that the clamping portion 401 of the inner ring of the limiting clamp ring 4 can be clamped into the annular groove 2022, and the limiting portion 402 of the outer ring of the limiting clamp ring 4 can fit tightly against the side of the rotor core 3 to achieve the limiting of the rotor core 3.

[0049] As an alternative, in some embodiments, the cross section of the annular groove 2022 can also be set to a quadrilateral with a wide inside and a narrow outside, and the cross section of the clamping portion 401 is a quadrilateral that matches the cross section shape of the annular groove 2022. For example, the cross sections of the annular groove 2022 and the clamping portion 401 can both be set to an isosceles trapezoid or a right-angled trapezoid (not shown). By designing the annular groove 2022 and the clamping portion 401 in this cross-sectional shape, the clamping portion 401 can be limited in the radial direction to avoid radial movement of the limiting clamp ring 4, improve the clamping stability of the limiting clamp ring 4, and further improve the limiting stability of the limiting clamp ring 4 on the rotor core 3.

[0050] Further, in order to facilitate the installation and removal of the limiting snap ring 4, in this embodiment, the limiting snap ring 4 is made of elastic material, for example, the limiting snap ring 4 can be made of spring steel, see Figure 3 , a fracture 403 is provided on the limit snap ring 4. Thus, when the limit snap ring 4 is installed, the limit snap ring 4 can be opened from the fracture 403 and then sleeved on the annular groove 2022, and the limit snap ring 4 is connected to the annular groove 2022 by the elasticity of the limit snap ring 4.

[0051] See also Figure 1 and Figure 3In some embodiments, a stopper 301 protruding axially outward is provided at the second end of the rotor core 3. The stopper 301 is located in the fracture 403 of the stopper clasp 4, and the thickness of the stopper 301 is less than the thickness of the stopper clasp 4. In this way, the stopper 4 can be circumferentially limited by the stopper 301 to prevent the stopper 4 from rotating around the annular groove 2022 and causing the stopper 4 to become loose.

[0052] See also Figure 3 In some embodiments, at least one end of the fracture 403 of the limiting snap ring 4 is provided with a notch 404, and the notch 404 extends inward from a position inside the outer circumference of the limiting snap ring 4 to the inner circumference of the limiting snap ring 4. In this way, the notch 404 allows a gap between the end of the limiting snap ring 4 close to the fracture 403 and the bottom wall of the slide groove, and the gap can be used as a prying opening, so that the limiting snap ring 4 can be removed from the ring groove 2022 through the prying opening with a tool, and the disassembly is more convenient.

[0053] The utility model also provides a motor, which comprises any one of the above-mentioned rotors.

[0054] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A rotor, characterized in that: It comprises a rotor shaft (1), a rotor support (2) and a rotor core (3); The rotor support (2) comprises an inner tube portion (201), an outer tube portion (202), and a connecting portion (203) connected between the inner tube portion (201) and the outer tube portion (202); The inner tube portion (201) of the rotor support (2) is sleeved on the rotor shaft (1), and is circumferentially limited with the rotor shaft (1) by a circumferential limiting structure and axially limited by an axial limiting structure; The rotor core (3) is sleeved on the outer tube portion (202) of the rotor bracket (2); a first end protrusion of the outer tube portion (202) is provided with a limit ring (2021) abutting against the first end of the rotor core (3); a second end of the outer tube portion (202) is provided with an inwardly concave annular groove (2022); an elastic limit snap ring (4) is detachably connected in the annular groove (2022); a break (403) is provided on the limit snap ring (4); and the limit snap ring (4) abuts against the second end of the rotor core (3).

2. The rotor according to claim 1, characterized in that: The limiting clamp ring (4) comprises a clamping portion (401) that is clamped with the annular groove (2022) and a limiting portion (402) that abuts against the rotor core (3); the limiting portion (402) is located outside the annular groove (2022).

3. The rotor according to claim 2, characterized in that: The cross-section of the annular groove (2022) is rectangular, and the cross-section of the clamping portion (401) is a rectangle that matches the cross-section shape of the annular groove (2022).

4. The rotor according to claim 2, characterized in that: The cross-section of the annular groove (2022) is a quadrilateral that is wide inside and narrow outside, and the cross-section of the clamping portion (401) is a quadrilateral that matches the cross-section shape of the annular groove (2022).

5. The rotor according to claim 4, characterized in that: The cross section of the annular groove (2022) is an isosceles trapezoid or a right-angled trapezoid.

6. The rotor according to claim 1, characterized in that: At least one end of the fracture (403) of the limiting clamp (4) is provided with a notch (404), and the notch (404) extends inwardly from a position inside the outer peripheral surface of the limiting clamp (4) to the inner peripheral surface of the limiting clamp (4).

7. The rotor according to claim 1, characterized in that: The second end of the rotor core (3) is axially protruding outward to be provided with a limit block (301), and the limit block (301) is located in the fracture (403).

8. The rotor according to claim 1, characterized in that: The axial limiting structure comprises a shaft shoulder (101) fixedly arranged on the rotor shaft (1) and a locking sleeve (102) detachably connected to the rotor shaft (1); the locking sleeve (102) is threadedly connected to the rotor shaft (1); the locking sleeve (102) and the shaft shoulder (101) clamp and fix the inner tube portion (201) of the rotor bracket (2).

9. The rotor according to claim 1, characterized in that: The circumferential limiting structure comprises a connecting key (103), the rotor shaft (1) and the rotor support (2) are both provided with a keyway, a part of the connecting key (103) is located in the keyway of the rotor shaft (1), and another part is located in the keyway of the rotor support (2); or The circumferential limiting structure comprises an internal spline arranged in the inner hole of the inner tube portion (201) of the rotor support (2), and an external spline arranged on the surface of the rotor shaft (1) and matching with the internal spline.

10. A motor, characterized in that: A rotor comprising the rotor described in any one of claims 1 to 9.

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