End plate structure of surface-mounted rotor
By setting a combined structure of annular baffles and sleeves at both ends of the rotor shaft, the problem of axial movement of the surface-mounted motor rotor magnets is solved, and fast and convenient axial constraint and stable connection are achieved to adapt to high-speed rotation conditions.
Patent Information
- Application Number
- CN202422747983.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-11
AI Technical Summary
The existing surface-mounted motor rotor lacks effective constraints on the axial movement of the magnet, which may cause the magnet to move out of position under the action of electromagnetic force, affecting the motor performance.
An annular baffle is set at both ends of the rotor shaft. The inner hole of the annular baffle is sleeved on the outer wall of the sleeve. The sleeve is sleeved on the rotor shaft, and an axial limit blocking cooperation is formed by the protrusion and the annular groove to achieve axial constraint on the rotor core and the magnetic steel.
It realizes the quick and convenient axial constraint of the rotor core and the magnet, ensures the stability of the magnet, avoids affecting the assembly of the rotor and stator, and adapts to the stable connection under high-speed rotation conditions.
Smart Images
Figure CN223391164U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motors, and in particular relates to an end plate structure of a surface-mounted rotor. Background Art
[0002] Permanent magnet synchronous motors usually use surface-mounted or built-in magnetic circuits. The magnets on the rotor of surface-mounted motors are generally in the shape of arc tiles. The magnets are bonded to the surface of the rotor body. Rotor end plates are usually used on the motor rotor. Generally, a motor has two rotor end plates, which are installed on both sides of the axial direction of several rotor punchings. They mainly play the role of pressing the rotor punchings and magnets. Therefore, in order to prevent the magnets from moving axially under the action of electromagnetic force, end plates need to be set at the ends of the rotor body to constrain the magnets and avoid axial movement of the magnets. Utility Model Content
[0003] The utility model provides an end plate structure of a surface-mounted rotor, which is intended to quickly and conveniently perform axial restraint on the rotor core and magnetic steel.
[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0005] A surface-mounted rotor end plate structure is provided, wherein annular baffles are provided at both end faces of the rotor core on the rotor shaft, the plate surface of the annular baffle is perpendicular to the axial direction of the rotor shaft, the inner hole of the annular baffle is sleeved on the outer wall of the inner end of the sleeve in the longitudinal direction, and the sleeve is sleeved on the rotor shaft.
[0006] In the above scheme, annular baffles are provided at both end faces of the rotor core on the sub-shaft, the plate surface of the annular baffle is perpendicular to the axial direction of the rotor shaft, the inner hole of the annular baffle is sleeved on the outer wall of the inner end of the casing in the longitudinal direction, the casing is sleeved on the rotor shaft, and the annular baffles are located at both ends of the rotor core and the magnet to axially constrain the rotor core and the magnet. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0008] Figure 2 This is a schematic diagram of the rotor structure of the utility model;
[0009] Figure 3 It is a schematic diagram of the mid-end structure of the utility model. DETAILED DESCRIPTION
[0010] like Figures 1 to 3The end plate structure of a surface-mounted rotor is shown, and an annular baffle 12 is provided at both end faces of the rotor core 2 on the rotor shaft 1. The plate surface of the annular baffle 12 is perpendicular to the axial direction of the rotor shaft 1. The inner hole of the annular baffle 12 is sleeved on the outer wall of the inner end of the sleeve 11 in the length direction of the tube, and the sleeve 11 is sleeved on the rotor shaft 1.
[0011] In the above scheme, the sleeve 11 is fixedly sleeved on the rotor shaft 1, and the outer wall of the inner end of the sleeve 11 is fixed to the inner hole of the annular baffle 12. The annular baffle 12 is located at both ends of the rotor core 2 on the rotor shaft 1 to axially constrain the rotor core 1.
[0012] The rotor shaft 1 is provided with an annular groove 1A, and the sleeve 11 is stamped with a convex portion 111. The convex portion 111 is embedded in the annular groove 1A to form an axially limited blocking fit.
[0013] In the above solution, an annular groove 1A is provided on the rotor shaft 1. During the assembly process, the sleeve 11 is first placed on the rotor shaft 1, and then the sleeve 11 is punched at the position of the annular groove 1A. The sleeve 11 is punched out with a convex portion 111, which can quickly and conveniently achieve the positioning and fixation of the sleeve 11 and the rotor shaft 1.
[0014] Furthermore, the protrusions 111 are arranged circumferentially in intervals or continuously to form an annular convex ring, and the protrusions 111 and the annular groove 1A form an axially limited blocking fit to ensure that the sleeve 11 is fixedly sleeved on the rotor shaft 1.
[0015] Furthermore, the rotor core 2 is attached with a magnetic steel 3 , and the outer plate edge of the annular baffle 12 is located within the thickness range of the end of the magnetic steel 3 in the radial direction.
[0016] In the above scheme, the rotor core 2 is affixed with a magnet 3. In order to limit the axial position of the magnet 3, a circular baffle 12 is located at the end of the magnet 3 to limit the axial displacement of the magnet 3. At the same time, in order to avoid affecting the assembly of the rotor and the stator, the outer plate edge of the annular baffle 12 is located within the thickness range of the end of the magnet 3 in the radial direction. While satisfying the axial position limitation of the magnet 3, the smooth assembly of the rotor and the stator is ensured.
[0017] Furthermore, a protrusion portion 121 is formed on the outer surface of the annular baffle 12 .
[0018] In the above scheme, the protrusion portion 121 on the annular baffle 12 is stamped, which is very convenient. At the same time, a heat dissipation structure or a balance column can be set inside the protrusion portion 121. The balance column is embedded in the protrusion portion 121, which not only provides an embedding space for the balance column, but also ensures that the connection between the balance column and the motor rotor is stable under high-speed rotation.
[0019] Preferably, the bumps 121 are located within the same circumferential range and are evenly spaced 4 to 8 in number. Different numbers of bumps 121 can be provided according to different requirements, and heat dissipation or balancing structures can be provided in the bumps 121 .
Claims
1. An end plate structure of a surface mounted rotor, characterized in that : Annular baffles (12) are provided at both end faces of the rotor core (2) on the rotor shaft (1), the plate surface of the annular baffle (12) is perpendicular to the axial direction of the rotor shaft (1), the inner hole of the annular baffle (12) is sleeved on the outer wall of the inner end of the sleeve (11) in the length direction, and the sleeve (11) is sleeved on the rotor shaft (1).
2. The end plate structure of the surface-mounted rotor according to claim 1 is characterized in that The rotor shaft (1) is provided with an annular groove (1A), and the sleeve (11) is stamped with a convex portion (111), and the convex portion (111) is embedded in the annular groove (1A) to form an axially limited blocking fit.
3. The end plate structure of the surface-mounted rotor according to claim 2 is characterized in that The protrusions (111) are arranged in a circumferentially spaced manner or in a circumferentially continuous manner to form an annular protrusion.
4. The end plate structure of the surface-mounted rotor according to claim 1 is characterized in that : A magnetic steel (3) is attached to the rotor core (2), and the outer plate edge of the annular baffle (12) is located within the thickness range of the end of the magnetic steel (3) in the radial direction.
5. The end plate structure of the surface-mounted rotor according to claim 1 is characterized in that A protruding portion (121) is formed on the outer surface of the annular baffle (12).
6. The end plate structure of the surface-mounted rotor according to claim 5, characterized in that The protrusions (121) are located within the same circumferential range and are evenly spaced 4 to 8 in number.