Rotor structure of high-speed motor

Abstract

The utility model provides a rotor structure of a high-speed motor, which relates to the technical field of motors and comprises rotor punching sheets, lugs, a rotor core, positioning bulges, magnetic steel mounting grooves and magnetic steel. The number of the rotor punching sheets is multiple, and each rotor punching sheet is uniformly provided with a plurality of lug sheets at intervals along the circumferential direction of the rotor punching sheet. The end part of each lug is of a hook-shaped structure which is bent towards one side, and the hook-shaped structures of two adjacent lugs on each rotor punching sheet are mutually symmetrical; the plurality of rotor punching sheets are mutually laminated at a preset angle along the circumferential direction to form a rotor iron core, the plurality of lug sheets of each rotor punching sheet are mutually laminated along the axial direction to form a plurality of positioning bulges, and magnetic steel positioning grooves are formed among the plurality of positioning bulges along the axial direction of the rotor iron core; and the plurality of magnetic steels are mounted in the plurality of magnetic steel mounting grooves along the rotor core shaft in a one-to-one correspondence manner. The magnetic steel is hooked through the positioning protrusions in the high-speed rotation process of the motor, and the problem that the motor power is reduced or fails due to the fact that the magnetic steel flies out due to centrifugal force generated by high-speed rotation motion is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor rotor punching structure. Background Art

[0002] The motor is a common power equipment, mainly composed of two parts: the stator and the rotor. As the output component, some motor rotors rotate at high speed inside the stator. As the main part of the rotor, the magnet is designed on the surface of the rotor core. The magnet and the rotor core are fixed by special adhesive. Since the rotor rotates at high speed when working, a metal cylinder sleeve is usually installed on the outside of the magnet or a special wire is wound and dipped in paint and dried to strengthen the fixing effect of the magnet to prevent the magnet from being thrown off the rotor core due to centrifugal force. However, the installation of the metal cylinder sleeve is generally carried out by the press-fitting process. During the press-fitting process, the magnet is easily crushed by being squeezed; the process of winding wire, dipping in paint and drying is relatively easy to operate, but the dipping in paint process is a harmful type of work, and dipping in paint and drying requires a lot of manpower and time; the above two processes are often accompanied by manpower, material resources and time consumption. The magnet is easy to fly out due to the centrifugal force generated by the high-speed rotation of the motor, resulting in a reduction in motor power or failure. Utility Model Content

[0003] The main purpose of the utility model is to provide a rotor structure of a high-speed motor, so as to at least solve the problem that the medium between the cylinder sleeve or the gap between the wire and the magnetic steel is thrown out when the motor runs at high speed, resulting in reduced motor power or failure.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a rotor structure of a high-speed motor, including: a rotor punching, the rotor punching is a plurality of pieces, each rotor punching is evenly spaced with a plurality of ears along its circumferential direction; the end of the ear is a hook-shaped structure bent toward one side, and the hook-shaped structures of two adjacent ears on each rotor punching are symmetrical with each other; the plurality of rotor punchings are overlapped with each other at a preset angle along the circumferential direction to form a rotor core so that the plurality of ears of each rotor punching are overlapped with each other along the axial direction to form a plurality of positioning protrusions, and a magnetic steel mounting groove is formed between any two adjacent positioning protrusions along the axial direction of the rotor core; magnetic steel, the magnetic steel is a plurality of pieces, and the plurality of magnetic steel pieces are mounted in the plurality of magnetic steel mounting grooves one by one.

[0005] Furthermore, the cross section of the magnetic steel is an arc-shaped structure and matches the curvature of the outer side wall of the rotor core.

[0006] Furthermore, both ends of the magnetic steel are respectively provided with installation guide angles, and the installation guide angles are used to guide the magnetic steel into the magnetic steel installation groove along the axial direction.

[0007] Furthermore, the magnet and the magnet mounting groove are fixed with glue, and the glue is used to limit the axial displacement of the magnet.

[0008] Furthermore, a through hole is provided on the rotor punching sheet, and the through hole is used for installing the rotating shaft.

[0009] A rotor structure of a high-speed motor using the technical solution of the utility model comprises a rotor punching, an ear piece, a rotor core, a positioning protrusion, a magnetic steel installation groove and a magnetic steel; the rotor punching is composed of multiple pieces, and each rotor punching is evenly spaced along its circumferential direction with multiple ear pieces; the end of the ear piece is a hook-shaped structure bent toward one side, and the hook-shaped structures of two adjacent ear pieces on each rotor punching are symmetrical to each other; multiple rotor punchings are mutually overlapped at a preset angle along the circumferential direction to form a rotor core, and multiple ear pieces of each rotor punching are mutually overlapped along the axial direction to form multiple positioning protrusions, and magnetic steel positioning grooves are formed between multiple positioning protrusions along the axial direction of the rotor core; there are multiple magnetic steels, and multiple magnetic steels are correspondingly installed in multiple magnetic steel installation grooves along the axial direction of the rotor core. During the high-speed rotation of the motor, the magnetic steel is hooked by the positioning protrusion, so as to avoid the problem that the magnetic steel flies out due to the centrifugal force generated by the high-speed rotation movement, resulting in the reduction of motor power or failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0011] Figure 1 This is a schematic diagram of the installation of a rotor structure (without the shaft installed) of a high-speed motor that can be selected according to an embodiment of the utility model. Figure 1 ;

[0012] Figure 2 It is a plan view of a rotor punching of a rotor structure of a high-speed motor that can be selected according to an embodiment of the utility model;

[0013] Figure 3 It is a rotor core plan view of a rotor structure of a high-speed motor that can be selected according to an embodiment of the utility model;

[0014] Figure 4 The magnetic steel cross section of the rotor structure of a high-speed motor can be selected according to the embodiment of the utility model. Figure 1 ;

[0015] Figure 5 This is a schematic diagram of the installation of a rotor structure (without the shaft installed) of a high-speed motor that can be selected according to an embodiment of the utility model. Figure 2 ;

[0016] Figure 6 The magnetic steel cross section of the rotor structure of a high-speed motor can be selected according to the embodiment of the utility model. Figure 2 .

[0017] The above drawings include the following reference numerals:

[0018] 10. rotor punching sheet; 11. through hole; 20. ear piece; 30. rotor core; 40. positioning protrusion; 50. magnetic steel installation groove; 60. magnetic steel; 61. installation guide angle; 70. adhesive. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] According to a rotor structure of a high-speed motor according to an embodiment of the utility model, Figure 1 , Figure 5 As shown, it includes a rotor punching 10, an ear 20, a rotor core 30, a positioning protrusion 40, a magnetic steel mounting groove 50 and a magnetic steel 60; the rotor punching 10 is composed of multiple pieces, and each rotor punching 10 is provided with multiple ears 20 evenly spaced along its circumferential direction; the end of the ear 20 is a hook-shaped structure bent toward one side, and the hook-shaped structures of two adjacent ears 20 on each rotor punching 10 are symmetrical to each other; the multiple rotor punchings 10 are overlapped with each other at a preset angle along the circumferential direction to form the rotor core 30, and the multiple ears 20 of each rotor punching 10 are overlapped with each other along the axial direction to form multiple positioning protrusions 40, and a magnetic steel mounting groove 50 is formed between any two adjacent positioning protrusions 40 along the axial direction of the rotor core 30; the magnetic steel 60 is composed of multiple pieces, and the multiple magnetic steels 60 are mounted in the multiple magnetic steel mounting grooves 50 in a one-to-one correspondence. The magnet 60 is installed into the magnet installation groove 50 along the axial direction of the rotor core 30. During the high-speed rotation of the motor, the magnet 60 is hooked by the positioning protrusion 40, thereby preventing the magnet 60 from flying out due to the centrifugal force generated by the high-speed rotation movement, resulting in reduced motor power or failure.

[0021] Furthermore, if Figure 2 and Figure 3 As shown, the protruding end of the ear piece 20 is hook-shaped, and each rotor punching 10 is rotated 180° and is superimposed and pressed with another adjacent rotor punching 10 to form a rotor core 30. A row of positioning protrusions 40 is provided on the rotor core 30 along the axial direction, and a plurality of magnetic steel mounting grooves 50 are formed between each row of positioning protrusions 40 for mounting magnetic steel 60. The number of magnetic steel mounting grooves 50 is the same as the number of ear pieces 20, and the length of the magnetic steel 60 is the same as the rotor core 30 or the same as the total length of the rotor core 30 divided into several sections.

[0022] Furthermore, if Figure 4 , Figure 6As shown, both ends of the magnet 60 are respectively provided with installation guide angles 61, and the installation guide angles 61 are the corners of the magnet 60 set as rounded corners, so that the installation guide angles 61 can guide the magnet 60 axially into the magnet installation groove 50; the cross-section of the magnet 60 is arc-shaped, which is convenient for installing the magnet 60 into the magnet installation groove 50. After the magnet 60 is installed in the magnet installation groove 50, the positioning protrusion 40 fixes the magnet 60, and the magnet 60 will not fly out due to centrifugal force during the rotation of the motor.

[0023] Furthermore, if Figure 1 , Figure 5 As shown, the magnet 60 and the magnet mounting groove 50 are fixed with adhesive 70, and the adhesive 70 is used to limit the axial displacement of the magnet 60. The adhesive 70 is applied to the contact surface between the rotor core 30 and the magnet 60, and the magnet 60 coated with adhesive 70 is axially pressed into the magnet mounting groove 50.

[0024] Furthermore, if Figure 1 , Figure 5 As shown, a through hole 11 is provided on the rotor punching 10, and the through hole 11 is used to install the rotating shaft. Adjacent rotor punchings 10 are rotated 180 degrees and overlapped with each other and fixed on the rotating shaft.

[0025] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotor structure of a high-speed motor, characterized in that: include: A rotor punching (10), wherein the rotor punching (10) is composed of a plurality of pieces, each piece of the rotor punching (10) being provided with a plurality of lugs (20) evenly spaced in a circumferential direction thereof; the end of the lug (20) being a hook-shaped structure bent toward one side, and the hook-shaped structures of two adjacent lugs (20) on each piece of the rotor punching (10) being symmetrical to each other; the plurality of rotor punchings (10) being mutually superimposed at a preset angle in a circumferential direction to form a rotor core (30) so that the plurality of lugs (20) of each piece of the rotor punching (10) are mutually superimposed in an axial direction to form a plurality of positioning protrusions (40), and a magnetic steel mounting groove (50) is formed in an axial direction of the rotor core (30) between any two adjacent positioning protrusions (40); A magnetic steel (60), wherein the magnetic steel (60) is composed of a plurality of pieces, and the plurality of pieces of the magnetic steel (60) are mounted in the magnetic steel mounting groove (50) in a one-to-one correspondence; and mounting guide angles (61) are respectively provided at both ends of the magnetic steel (60), and the mounting guide angles (61) are rounded, and the mounting guide angles (61) are used to guide the magnetic steel (60) into the magnetic steel mounting groove (50) along the axial direction of the rotor core (30).

2. The rotor structure of a high-speed motor according to claim 1, characterized in that: The magnetic steel (60) The cross section is an arc-shaped structure and matches the curvature of the outer side wall of the rotor core (30).

3. The rotor structure of a high-speed motor according to claim 1, characterized in that: The magnetic steel (60) and The magnetic steel installation grooves (50) are fixed with adhesive (70), and the adhesive (70) is used to limit the axial displacement of the magnetic steel (60).

4. The rotor structure of a high-speed motor according to claim 1, characterized in that: The rotor punching sheet (10) A through hole (11) is provided on the upper portion, and the through hole (11) is used for installing the rotating shaft.

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