CN214177006U

CN214177006U - Rotor of permanent magnet brushless motor

Info

Publication number: CN214177006U
Application number: CN202023168783.4U
Authority: CN
Inventors: 冯厚攀; 马建坤; 高竹发
Original assignee: Hangzhou Weiguang Technology Co ltd
Current assignee: Hangzhou Weiguang Technology Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-09-10
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a rotor of a permanent magnet brushless motor, which comprises a central shaft, an iron core and a plastic coating; the iron core sleeve is established in the center pin outside, and the package is moulded and is set up at the iron core both ends, be equipped with a plurality of heat dissipation aperture and a plurality of induced air board on the terminal surface of the package is moulded. The utility model provides a permanent magnet brushless motor's rotor can accelerate the flow of the inside air of motor when the motor rotates through heat dissipation aperture and induced air board to dispel the heat with higher speed.

Description

Rotor of permanent magnet brushless motor

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to a permanent magnet brushless motor's rotor is related to.

Background

At present common electric motor rotor structure is comparatively simple, and it is very fast to heat up at high-speed moving in-process motor when the motor, if can not in time go the high possibility to damage the motor with the temperature drop, and common radiating mode is a radiator fan of installation on the present electric motor rotor, but plus fan structure can increase the size of whole motor to increase motor cost. Therefore, it is desirable to design a rotor of a permanent magnet brushless motor that solves the heat dissipation problem of the motor and other problems during the installation of the rotor.

Chinese patent application publication No. CN207339466U, published as 2018, 05, and 08, entitled "a wrong-pole rotor structure for an ac permanent-magnet synchronous servo motor", discloses a wrong-pole rotor structure for an ac permanent-magnet synchronous servo motor, which includes motor magnetic steel, a motor rotor core, and a motor shaft, wherein a circumferential surface of the motor shaft is respectively formed with a first groove and a second groove, a center line of a cross section of the first groove and a center line of a cross section of the second groove form an included angle of 180 °, an inner side surface of the motor rotor core is formed with a third groove and a fourth groove, a center line of a cross section of the third groove and a center line of the fourth groove form an included angle of 141 ° or 147 °, and the number of the motor rotor cores is two, the third groove and the first groove of one motor rotor core are opposite to each other, and the fourth groove and the second groove of the other motor rotor core are opposite to each other. However, the rotor mounting structure still does not solve the above-mentioned heat dissipation problem.

Disclosure of Invention

The utility model discloses an overcome the heat dissipation problem that exists of motor among the prior art, provide a permanent magnet brushless motor's rotor, can accelerate the flow of the inside air of motor when the motor rotates through heat dissipation aperture and induced air board to dispel the heat with higher speed.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a rotor of a permanent magnet brushless motor comprises a central shaft, an iron core and plastic coating; the iron core sleeve is established in the center pin outside, and the package is moulded and is set up at the iron core both ends, be equipped with a plurality of heat dissipation aperture and a plurality of induced air board on the terminal surface of the package is moulded.

In the technical scheme, the central shaft, the iron core and the plastic coating are relatively fixed. The air guide plate can accelerate the air flow in the motor when the motor rotates, so that the heat dissipation is accelerated; the small heat dissipation holes can effectively accelerate the dissipation of heat inside the motor when the motor is in operation and temperature rise. The edge that the package was moulded is equipped with a plurality of recess, and its purpose moulds better inlaying together for iron core and package.

Preferably, the induced draft plates are uniformly distributed along the plastic-coated circumferential direction.

Preferably, the central shaft is provided with a knurling structure in the middle. The knurling structure can increase the friction between the central shaft and the iron core and ensure the assembling tightness; the relative sliding between the shaft and the rotor can be prevented when the motor rotates at high speed.

Preferably, annular grooves are formed in two sides of the knurling structure of the central shaft. The annular groove can effectively prevent glue from flowing out when the central shaft is installed.

Preferably, the inner hole of the iron core is spline-like, and pin holes are formed in two ends of the iron core. The pin hole structure may join the laminations of the core together.

Preferably, the inner hole of the iron core is provided with a positioning long groove. The positioning long groove can ensure that the position of each punching sheet is certain when the punching sheets are connected.

Preferably, the shaft hole covered with the plastic is provided with a foreign matter groove. The foreign matter groove can store the foreign matter on the axle when the assembly bearing.

The utility model has the advantages that: (1) the air guide plate can accelerate the air flow in the motor when the motor rotates, so that the heat dissipation is accelerated; (2) the small heat dissipation holes can effectively accelerate the dissipation of heat inside the motor when the motor is in operation and temperature rise; (3) the groove can effectively prevent the outflow of glue coated on the central shaft during installation; (4) the knurling structure increases the friction between the central shaft and the iron core, and ensures the assembling tightness; the relative sliding between the shaft and the rotor can be prevented when the motor rotates at high speed.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the center shaft of the present invention;

fig. 3 is a schematic structural diagram of the iron core in the present invention.

In the figure: the core comprises a central shaft 110, a knurling structure 111, an annular groove 112, plastic coating 120, a small heat dissipation hole 121, an air guide plate 122, a foreign body groove 123, an iron core 130, a pin hole 131, a positioning long groove 132 and an inner hole 133.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1:

as shown in fig. 1, 2 and 3, a rotor of a permanent magnet brushless motor includes a central shaft, a core 130 and a plastic-coated layer 120; the iron core 130 is sleeved outside the central shaft, the plastic-coated 120 is arranged at two ends of the iron core 130, a plurality of small heat dissipation holes 121 and a plurality of air guide plates 122 are arranged on the end face of the plastic-coated 120, and the air guide plates 122 are uniformly distributed along the circumferential direction of the plastic-coated 120; the small heat dissipation holes 121 are uniformly distributed along the circumferential direction of the plastic-coated layer 120. The middle part of the central shaft is provided with a knurled structure 111, and two sides of the knurled structure 111 of the central shaft are provided with annular grooves 112. The inner hole 133 of the core 130 has a spline-like shape, and the core 130 has pin holes 131 at both ends. The inner hole 133 of the iron core 130 is provided with a positioning long groove 132. The shaft hole of the plastic-coated 120 is provided with a foreign body groove 123.

In the above technical solution, the central shaft, the iron core 130 and the plastic-coated layer 120 are relatively fixed. The induced draft plate 122 can accelerate the flow of air inside the motor when the motor rotates, thereby accelerating heat dissipation; the small heat dissipation holes 121 can effectively accelerate the dissipation of heat inside the motor when the motor is in operation and temperature rise. The edge of the plastic-coated layer 120 is provided with a plurality of grooves for better embedding the iron core 130 and the plastic-coated layer 120. The knurling structure 111 can increase the friction between the central shaft and the iron core, and ensure the tightness of assembly; the relative sliding between the shaft and the rotor can be prevented when the motor rotates at high speed. The annular groove 112 is effective to prevent the outflow of the applied glue when the central shaft 110 is installed.

Claims

1. A rotor of a permanent magnet brushless motor comprises a central shaft, an iron core and plastic coating; the iron core is sleeved on the outer side of the central shaft, and the plastic-coated iron core is arranged at two ends of the iron core.

2. The rotor of a permanent magnet brushless motor according to claim 1, wherein the air guide plates are uniformly distributed along a circumferential direction of the plastic-coated rotor.

3. A rotor of a permanent magnet brushless motor according to claim 1, wherein a central portion of the central shaft is provided with a knurled structure.

4. A rotor of a permanent magnet brushless motor according to claim 1, wherein annular grooves are formed at both sides of the knurled structure of the central shaft.

5. A rotor of a brushless permanent magnet motor according to claim 1, 2, 3 or 4, wherein the inner hole of the core is spline-like and pin holes are formed at both ends of the core.

6. A rotor of a brushless permanent magnet motor according to claim 5, wherein the inner hole of the core is provided with a positioning elongated slot.

7. A rotor of a permanent magnet brushless motor according to claim 1, 2, 3 or 4, wherein the plastic-coated shaft hole is provided with a foreign body groove.