Rear end cover and rotor assembly matching structure and plastic package induction motor

Abstract

The utility model discloses a rear end cover and rotor assembly cooperation structure and a plastic package induction motor, and relates to the motor technology field, the rear end cover and rotor assembly cooperation structure comprises a rear end cover, one side of the rear end cover is provided with an annular projection, the internal part of the projection is an accommodating cavity, and the external diameter size of the projection is d1; the rotor assembly comprises a rotor, a rotating shaft and a rolling bearing, a groove is formed in the side, facing the rear end cover, of the rotor, and the diameter of the groove is d2 and d2gt; d1, the rotating shaft is installed in the middle of the rotor and extends up and down, the number of the rolling bearings is two, the rolling bearings are arranged at the two ends of the rotating shaft respectively, one rolling bearing is arranged in the containing cavity, and the protruding part extends into the groove. The rear end cover and rotor assembly matching structure saves the assembly space and reduces the overall height.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rear end cover and rotor assembly matching structure and a plastic-sealed induction motor using the rear end cover and rotor assembly matching structure. Background Art

[0002] An induction motor, also known as an "asynchronous motor", is a device that places a rotor in a rotating magnetic field and obtains a torque under the action of the rotating magnetic field, thereby causing the rotor to rotate.

[0003] The housing of the induction motor is equipped with a front cover and a rear cover to enclose the rotor assembly inside the housing. In order to avoid collision between the rear cover and the end face of the rotor assembly, a gap is formed between the bottom of the rear cover and the end face of the rotor assembly, resulting in a higher overall height of the motor and occupying a larger assembly space. Utility Model Content

[0004] The main purpose of the utility model is to provide a rear end cover and rotor assembly matching structure, aiming to provide a rear end cover and rotor assembly matching structure that saves assembly space and reduces overall height.

[0005] To achieve the above-mentioned purpose, the rear end cover and rotor assembly matching structure proposed in the present invention is applied to a motor, and the rear end cover and rotor assembly matching structure includes:

[0006] A rear end cover, one side of which has a circular protrusion, the interior of which is a receiving cavity, and the outer diameter of which is d1;

[0007] The rotor assembly includes a rotor, a rotating shaft and a rolling bearing. A groove is formed on the side of the rotor facing the rear end cover, and the diameter of the groove is d2, d2>d1. The rotating shaft is installed in the middle of the rotor and extends up and down. There are two rolling bearings and they are respectively arranged at both ends of the rotating shaft. One rolling bearing is arranged in the accommodating cavity, and the protruding portion extends into the groove.

[0008] Optionally, the protrusion is integrally formed by stretching.

[0009] Optionally, the bottom inner side of the accommodating cavity and the top inner side of the groove are both provided with chamfers.

[0010] Optionally, an annular clamping portion is formed on the outer side of the rear end cover.

[0011] Optionally, a clearance hole is provided in the middle of the rear end cover.

[0012] The present invention also provides a plastic-encapsulated induction motor, which includes the rear end cover and rotor assembly matching structure as described above.

[0013] The technical solution of the present utility model includes a rear end cover and a rotor assembly. The annular protrusion of the rear end cover can partially extend into the groove of the rotor during assembly. Since the protrusion and the groove are matched to reduce the assembly height, the technical problem of the overall height of the motor being high and occupying a large assembly space in the prior art is effectively solved, thereby achieving the technical effect of saving assembly space and reducing the overall height. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of an embodiment of the matching structure of the rear end cover and the rotor assembly of the present utility model;

[0015] Figure 2 This is a schematic diagram of the disassembled structure of the rear end cover and the rotor assembly matching structure of the utility model;

[0016] Figure 3 This is a cross-sectional schematic diagram of the matching structure of the rear end cover and the rotor assembly of the present invention;

[0017] Figure 4 This is a schematic structural diagram of the rear end cover of the utility model;

[0018] Figure 5 This is a structural diagram of an embodiment of a plastic-encapsulated induction motor of the present invention;

[0019] Figure 6 This is a schematic cross-sectional view of the plastic-encapsulated induction motor of the present invention;

[0020] Description of Figure Numbers:

[0021] Plastic-encapsulated induction motor 100; rear end cover and rotor assembly matching structure 10; rear end cover 11; protrusion 111; clamping portion 112; clearance hole 113; rotor assembly 12; rotor 121; groove 1211; rotating shaft 122; rolling bearing 123. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0026] The utility model provides a rear end cover and rotor assembly matching structure 10, which is applied to a motor.

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] In the embodiment of the present utility model, as Figures 1 to 4 As shown, the matching structure of the rear end cover 11 and the rotor assembly 12 includes the rear end cover 11 and the rotor assembly 12, wherein one side of the rear end cover 11 has a circular protrusion 111, the interior of the protrusion 111 is an accommodating cavity, and the outer diameter size of the protrusion 111 is d1; the rotor assembly 12 includes a rotor 121, a rotating shaft 122 and a rolling bearing 123, and a groove 1211 is formed on the side of the rotor 121 facing the rear end cover 11, and the diameter of the groove 1211 is d2, d2>d1, the rotating shaft 122 is installed in the middle of the rotor 121 and extends up and down, there are two rolling bearings 123 and are respectively arranged at both ends of the rotating shaft 122, one rolling bearing 123 is arranged in the accommodating cavity, and the protrusion 111 partially extends into the groove 1211.

[0029] In the present invention, the protrusion 111 of the rear end cover 11 can be used to accommodate one of the rolling bearings 123 of the rotor assembly 12, playing an assembly role. At the same time, the protrusion 111 partially extends into the groove 1211, which can reduce the overall height after assembly without causing collision. The groove 1211 can be in the shape of a cylindrical hole or have a certain taper. The inner diameter d2 of the groove 1211 is larger than the outer diameter d1 of the protrusion 111 to ensure that the protrusion 111 can partially extend into the groove 1211.

[0030] The technical solution of the present utility model includes a rear end cover 11 and a rotor assembly 12. The annular protrusion 111 of the rear end cover 11 can partially extend into the groove 1211 of the rotor 121 during assembly. Since the protrusion 111 and the groove 1211 are matched to reduce the assembly height, the technical problem of the overall height of the motor being high and occupying a large assembly space in the prior art is effectively solved, thereby achieving the technical effect of saving assembly space and reducing the overall height.

[0031] In the embodiment of the present invention, the protrusion 111 is formed by integral stretching. The metal sheet is formed into the rear end cover 11 with the protrusion 111 through processes such as stamping and stretching. The integral forming method can reduce the splicing and processing processes and improve the integrity and stability of the product.

[0032] In the embodiment of the present utility model, as Figure 2 、 Figure 3 and Figure 4 As shown, the bottom inner side of the accommodating cavity and the top inner side of the groove 1211 are both chamfered. The chamfered bottom of the accommodating cavity can guide the assembly of the rolling bearing 123 and reduce collisions. Similarly, the chamfered top of the groove 1211 also facilitates the insertion of the protrusion 111, playing a guiding role.

[0033] In the embodiment of the present utility model, as Figure 2 As shown, an annular clamping portion 112 is formed on the outer side of the rear end cover 11. The function of the clamping portion 112 is to clamp and assemble with the housing, and to achieve a clamping fit by deformation.

[0034] In the embodiment of the present utility model, as Figure 1 and Figure 2 As shown, a clearance hole 113 is provided in the middle of the rear end cover 11. The end of the rotating shaft 122 of the rotor assembly 12 extends out through the clearance hole 113.

[0035] The present invention also provides a plastic-encapsulated induction motor 100, such as Figure 5 and Figure 6As shown, the plastic-encapsulated induction motor 100 includes a rear end cover and rotor assembly mating structure 10. The specific structure of the rear end cover and rotor assembly mating structure 10 is similar to the above-mentioned embodiments. Since the plastic-encapsulated induction motor 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and will not be described in detail here. The plastic-encapsulated induction motor 100 includes a stator assembly, a housing, a rotor assembly 12, a front end cover, and a rear end cover 11. The stator assembly and the housing are integrally encapsulated using a plastic encapsulation process.

[0036] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, within the inventive concept of the present invention, are included in the patent protection scope of the present invention.

Claims

1. A rear end cover and rotor assembly matching structure, applied to a motor, characterized in that: The rear end cover and rotor assembly matching structure includes: A rear end cover, one side of which has a circular protrusion, the interior of which is a receiving cavity, and the outer diameter of which is d1; The rotor assembly includes a rotor, a rotating shaft and a rolling bearing. A groove is formed on the side of the rotor facing the rear end cover, and the diameter of the groove is d2, d2>d1. The rotating shaft is installed in the middle of the rotor and extends up and down. There are two rolling bearings and they are respectively arranged at both ends of the rotating shaft. One rolling bearing is arranged in the accommodating cavity, and the protruding portion extends into the groove.

2. The rear end cover and rotor assembly matching structure according to claim 1, characterized in that: The protrusion is formed by stretching in one piece.

3. The rear end cover and rotor assembly matching structure according to claim 1, characterized in that: The inner side of the bottom of the accommodating cavity and the inner side of the top of the groove are both chamfered.

4. The rear end cover and rotor assembly matching structure according to claim 1, characterized in that: An annular clamping portion is formed on the outer side of the rear end cover.

5. The rear end cover and rotor assembly matching structure according to claim 1, characterized in that: A clearance hole is provided in the middle of the rear end cover.

6. A plastic-encapsulated induction motor, characterized in that: The plastic-encapsulated induction motor includes the rear end cover and rotor assembly matching structure according to any one of claims 1 to 5.

Images