Rotor assembly

Abstract

The utility model relates to a rotor assembly, which comprises a rotating shaft, a rotor iron core and rotor end plates, the rotating shaft is inserted in the rotor iron core, the two rotor end plates are sleeved on the rotating shaft and are respectively arranged at two ends of the rotor iron core, the rotor assembly also comprises a locking ring and a plurality of half-moon rings, the rotating shaft is also provided with a circle of groove, and the locking ring is arranged in the groove. Grooves are formed in the rotor end plate, the plurality of half-moon rings are respectively clamped in the grooves and spliced into a circular ring, the plurality of half-moon rings abut against the rotor end plate, and the locking ring is tightly buckled on the plurality of half-moon rings. According to the utility model, a circle of groove is processed on the rotating shaft of the motor, the lower side step of the half-moon ring is clamped into the groove, the upper side step of the half-moon ring holds the outer circle of the shaft diameter, and the locking ring is assembled and locked on the half-moon ring, so that the half-moon ring is prevented from being separated. The whole structure is mechanically limited, is simple and reliable, is easy to operate, and can effectively ensure that the iron core does not generate axial displacement.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor structures, and in particular relates to a rotor assembly. Background Art

[0002] At present, one structure of the motor rotor is that the iron core is pressed into the motor shaft with interference fit, and one end is limited by the shaft shoulder of the rotating shaft. Due to the existence of press-fit stress, impact load, torque transmission conditions, etc., there is a risk of axial movement between the iron core and the motor shaft. The usual practice is to add an axial limit at the other end of the rotor.

[0003] The traditional solution is to avoid the risk of axial movement of the rotor core by pressing a ring through interference fit. The ring solution is simple and easy to implement, and is currently being widely used. However, in essence, it is still like an iron core, and is fitted with the motor shaft through interference fit. Especially for the current hollow shaft, a larger interference fit is required than for a solid shaft to provide greater friction for limiting. However, a larger pressing force is required for a large interference fit, and press-fitting is prone to shearing and producing iron filings. In addition, the risk of interference fit failure still exists. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a rotor assembly, which is easy to assemble and has reliable axial limiting of the iron core.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0006] A rotor assembly includes a rotating shaft, a rotor core and a rotor end plate, wherein the rotating shaft is inserted into the rotor core, two rotor end plates are sleeved on the rotating shaft and are respectively located at the two ends of the rotor core, and further includes a locking ring and a plurality of half-moon rings. A circle of grooves is also provided on the rotating shaft, and a plurality of half-moon rings are respectively clamped in the grooves and assembled into a circular ring. The plurality of half-moon rings are against the rotor end plates, and the locking ring is tightly buckled on the plurality of half-moon rings.

[0007] As a preferred solution: the half-moon ring includes a first clamping ring portion and a second clamping ring portion that are integrally formed, the first clamping ring portion and the second clamping ring portion form a step shape, and the radius of the first clamping ring portion is greater than the radius of the second clamping ring portion.

[0008] As a preferred solution: the second clamping ring portion is inserted into the groove of the rotating shaft, and the first clamping ring portion is attached to the outer wall of the rotating shaft.

[0009] As a preferred solution: there are two half-moon rings, and the two end faces of each half-moon ring are inclined surfaces, and two inverted triangle-shaped gaps are formed after the two half-moon rings are assembled.

[0010] As a preferred solution: the locking ring includes an integrally formed end face and a side wall perpendicular to the end face, and the side wall of the locking ring is tightly matched with the outer wall of the first clamping ring portion.

[0011] As a preferred solution: the side wall height of the locking ring is greater than the thickness of the first clamping ring portion, and the excess portion is folded inward to form a limiting buckle edge.

[0012] The utility model processes a circle of grooves on the motor shaft, and then uses the lower step of the half-moon ring to fit into the groove, and the upper step holds the outer circle of the shaft diameter, and at the same time assembles a locking ring to lock the half-moon ring to prevent the half-moon ring from being disengaged. The entire structure is mechanically limited, simple, reliable, easy to operate, and can effectively ensure that the iron core does not produce axial displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0014] Figure 1 It is a schematic diagram of the overall structure of the motor rotor of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the motor rotor of the utility model;

[0016] Figure 3 It is a schematic diagram of the exploded structure of the half-moon ring, the locking ring and the rotating shaft of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the rotating shaft of the utility model;

[0018] Figure 5 It is a schematic diagram of the matching structure of the half-moon ring and the locking ring of the utility model;

[0019] Figure 6 It is a schematic diagram of the combined structure of two half-moon rings of the utility model;

[0020] The accompanying drawings are marked as follows: 1, rotating shaft; 2, rotor core; 3, baffle; 4, half-moon ring; 41, first clamping ring portion; 42, second clamping ring portion; 43, inclined surface; 5, locking ring; 11, groove. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0022] 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.

[0023] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0028] like Figures 1 to 6 A rotor assembly shown includes a rotating shaft 1, a rotor core 2 and a rotor end plate 3, wherein the rotating shaft 1 is inserted into the rotor core 2, and two rotor end plates 3 are sleeved on the rotating shaft 1 and are respectively located at the two ends of the rotor core 2, and further includes a locking ring 5 and a plurality of half-moon rings 4. A circle of grooves 11 is also provided on the rotating shaft 1, and a plurality of half-moon rings 4 are respectively clamped in the grooves 11 and assembled into a circular ring, and the plurality of half-moon rings 4 are against the rotor end plate 3, and the locking ring 5 is tightly buckled on the plurality of half-moon rings 4.

[0029] The half-moon ring 4 includes an integrally formed first snap ring portion 41 and a second snap ring portion 42, the first snap ring portion 41 and the second snap ring portion 42 are formed in a step shape, and the radius of the first snap ring portion 41 is greater than the radius of the second snap ring portion 42. The second snap ring portion 42 is inserted into the groove 11 of the rotating shaft 1, and the first snap ring portion 41 is attached to the outer wall of the rotating shaft 1.

[0030] There are two half-moon rings 4, and the two end faces of each half-moon ring 4 are inclined surfaces 43. Two inverted triangle-shaped gaps are formed after the two half-moon rings 4 are assembled. The half-moon rings can be inserted obliquely during installation by using the inclined surfaces, and then adjusted to a horizontal position after being in place, which reduces the difficulty of installation.

[0031] The locking ring 5 includes an integrally formed end face and a side wall perpendicular to the end face, and the side wall of the locking ring 5 is tightly matched with the outer wall of the first clamping ring portion 41. In order to further improve the installation firmness of the locking ring and the half-moon ring and prevent the half-moon ring from falling out, the height of the side wall of the locking ring 5 is greater than the thickness of the first clamping ring portion, and the excess part is folded inward to form a limit buckle edge.

[0032] The utility model processes a circle of grooves on the motor shaft, and then uses the lower step of the half-moon ring to fit into the groove, and the upper step hugs the outer circle of the shaft diameter, and then assembles the locking ring, and rivets the lower side of the locking ring to deform and lock it on the half-moon ring to prevent the half-moon ring from detaching. The solution of the utility model is mechanical limiting, which is simple, reliable, and easy to operate, and can effectively ensure that the iron core does not produce axial displacement. In addition, the iron core limiting structure of the utility model eliminates the limiting shoulder, so the molding process is simpler, and it can be directly forged with a steel pipe, which is more suitable for hollow shafts.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0034] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rotor assembly, comprising a rotating shaft (1), a rotor core (2) and a rotor end plate (3), wherein the rotating shaft (1) is inserted into the rotor core (2), and two rotor end plates (3) are sleeved on the rotating shaft (1) and are respectively located at two ends of the rotor core (2), characterized in that: It also includes a locking ring (5) and a plurality of half-moon rings (4). The rotating shaft (1) is also provided with a circle of grooves (11). The plurality of half-moon rings (4) are respectively clamped in the grooves (11) and assembled into a circular ring. The plurality of half-moon rings (4) are against the rotor end plate (3), and the locking ring (5) is tightly fastened to the plurality of half-moon rings (4).

2. A rotor assembly according to claim 1, characterized in that: The half-moon ring (4) comprises a first snap ring portion (41) and a second snap ring portion (42) which are integrally formed, the first snap ring portion (41) and the second snap ring portion (42) forming a step shape, and the radius of the first snap ring portion (41) is greater than the radius of the second snap ring portion (42).

3. A rotor assembly according to claim 2, characterized in that: The second clamping ring portion (42) is inserted into the groove (11) of the rotating shaft (1), and the first clamping ring portion (41) is attached to the outer wall of the rotating shaft (1).

4. A rotor assembly according to claim 1, characterized in that: There are two half-moon rings (4), and the two end faces of each half-moon ring (4) are inclined surfaces (43). When the two half-moon rings (4) are assembled, two inverted triangle-shaped gaps are formed.

5. A rotor assembly according to claim 2, characterized in that: The locking ring (5) comprises an integrally formed end face and a side wall perpendicular to the end face, and the side wall of the locking ring (5) is tightly matched with the outer wall of the first clamping ring portion (41).

6. A rotor assembly according to claim 5, characterized in that: The side wall height of the locking ring (5) is greater than the thickness of the first clamping ring portion, and the excess portion is folded inwards to form a limiting buckle edge.

Images