CN214036182U

CN214036182U - Plastic-magnetic rotor of cooling fan

Info

Publication number: CN214036182U
Application number: CN202022582733.4U
Authority: CN
Inventors: 谭黎明
Original assignee: Qingdao Jinli Magnetic Material Co ltd
Current assignee: Qingdao Jinli Magnetic Material Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-24
Anticipated expiration: 2030-11-10

Abstract

The utility model discloses a magnetic rotor is moulded to radiator fan relates to and moulds the magnetism field, uses outer brushless motor that turns to current radiator fan to have the higher problem of manufacturing cost, now proposes following scheme, and it includes electric motor rotor, electric motor rotor is cylindrically, just electric motor rotor's bottom has been seted up the circular slot, the circular slot runs through in electric motor rotor along electric motor rotor's axial, electric motor rotor includes magnetic lamella and wall, just electric motor rotor's top is provided with the end cover, the locating pin has been seted up on the top of end cover, just the pivot has been cup jointed along its axial to the end cover, just the pivot runs through in electric motor rotor, end cover and locating pin, the top of end cover is matchd and is installed the bladed disk, just the top of bladed disk is located locating pin department and has seted up the locating hole. The utility model discloses novel structure, and the device structure is succinct, the production of being convenient for and the installation is convenient, and the effectual current radiator fan that has solved uses outward to turn brushless motor and has the higher problem of manufacturing cost.

Description

Plastic-magnetic rotor of cooling fan

Technical Field

The utility model relates to a mould the magnetism field, especially relate to a magnetic rotor is moulded to radiator fan.

Background

The heat radiation fan is a common electronic accessory, the figure of the heat radiation fan can be seen in various chassis and electrical cabinets, an inner rotor brush motor is generally used at first in the structure of the heat radiation fan, but the service life and the noise of the inner rotor brush motor can not meet the requirement of higher equipment performance gradually, so the inner rotor brush motor is replaced by the outer rotor brushless motor gradually, the outer rotor motor is used as a power source of the heat radiation fan, and the heat radiation fan has many advantages, for example, fan blades are integrated on the shell of the outer rotor motor, for example, a flat design and the like, and the torsion of the outer rotor brushless motor is also superior to that of the inner rotor motor, and the heat radiation fan can drive blades with larger diameter or more blades.

In the existing brushless motor with outer rotor for cooling fan, the basic structure of the rotor is composed of outer shell and inner magnet, in order to ensure the sufficient mechanical strength of the assembled magnet and the dynamic balance of the installed magnet, the manufacturing process requirement and the production cost are higher, therefore, in order to solve the above problems, we propose a cooling fan plastic magnetic rotor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of magnetic rotor is moulded to radiator fan has solved current radiator fan and has used outward turning brushless motor to have the higher problem of manufacturing cost.

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

the utility model provides a magnetic rotor is moulded to radiator fan, includes electric motor rotor, electric motor rotor is cylindrically, just electric motor rotor's bottom has been seted up the circular slot, the circular slot runs through in electric motor rotor along electric motor rotor's axial, electric motor rotor includes magnetic petal and cuts off, just electric motor rotor's top is provided with the end cover, the locating pin has been seted up on the top of end cover, just the pivot has been cup jointed along its axial to the end cover, just the pivot runs through in electric motor rotor, end cover and locating pin, the top of end cover matches and installs the bladed disk, just the top of bladed disk is located locating pin department and matches and has seted up the locating hole, the top of bladed disk is located one side of locating hole and has seted up the round hole, just the round hole is annular array distribution about the locating hole.

Preferably, the magnetic lobes and the partitions are symmetrically distributed around the motor rotor, and the two partitions are located between the two magnetic lobes.

Preferably, the rotating shaft, the motor rotor, the end cover and the positioning pin are all coaxial, the outline of the positioning pin is hexagonal, and the positioning pin is in matched sleeve joint with the positioning hole.

Preferably, the two ends of the end cover and the positioning pin, which are close to each other, are located on the circumferential side wall of the rotating shaft, and gaps are formed between the two ends, and the two groups of gaps are communicated.

Preferably, the top end of the end cover is provided with threaded holes at the positions of the round holes, the top end of the leaf disc is provided with screws at the positions of the round holes in a matched mode, and the bottom end of each screw penetrates through the round holes and is in threaded connection with the threaded hole.

Preferably, the circumferential side wall of the blade disc is provided with blades in a matching way, and the blades are distributed in an annular array relative to the blade disc.

The utility model has the advantages that:

1. the magnetic valve of the device is made of engineering plastics containing magnetic substances and has strong magnetism, the partition, the end cover and the positioning pin are made of engineering plastics without magnetic substances, the magnetic valve replaces a magnet part in a traditional outer rotor structure, and the magnetic valve, the partition, the end cover and the positioning pin are directly integrated to form the whole rotor structure, so that the production flow is simplified, the production efficiency is improved, and the production cost is reduced.

2. The hexagonal positioning pins and the positioning holes of the device are responsible for positioning the blade disc, so that the assembling precision of the blades is improved, and the assembling difficulty of the blades is reduced.

3. A gap is reserved in the connecting part of the rotor and the rotating shaft, and the rotating shaft and the rotor are installed in an interference fit mode, so that engineering glue filling is carried out through the gap to reinforce the connecting strength and prevent the rotating shaft from falling off.

In conclusion, the device has the advantages of simple structure, convenience in production and convenience in installation, and effectively solves the problem that the existing external rotation brushless motor for the cooling fan is high in production cost.

Drawings

Fig. 1 is a top view of the present invention.

Fig. 2 is a sectional view of the internal structure of the present invention.

Fig. 3 is a cross-sectional view of a-a in fig. 2 according to the present invention.

Fig. 4 is an enlarged view of the structure B in fig. 2 according to the present invention.

Reference numbers in the figures: 1. a magnetic flap; 2. separating; 3. a circular groove; 4. an end cap; 5. positioning pins; 6. a rotating shaft; 7. a gap; 8. a leaf disc; 9. a circular hole; 10. positioning holes; 11. a threaded hole; 12. a screw; 13. a blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, a plastic-magnetic rotor for a cooling fan comprises a motor rotor, the motor rotor is cylindrical, a circular groove 3 is formed in the bottom end of the motor rotor, the circular groove 3 penetrates through the motor rotor along the axial direction of the motor rotor, the motor rotor comprises a magnetic petal 1 and a partition 2, an end cover 4 is arranged on the top end of the motor rotor, a positioning pin 5 is formed in the top end of the end cover 4, a rotating shaft 6 is sleeved on the end cover 4 along the axial direction of the end cover 4, the rotating shaft 6 penetrates through the motor rotor, the end cover 4 and the positioning pin 5, a vane disc 8 is mounted on the top end of the end cover 4 in a matched manner, a positioning hole 10 is formed in the position, at which the top end of the vane disc 8 is located, of the positioning hole 10, a circular hole 9 is formed in one side of the positioning hole 10, the circular hole 9 is distributed in an annular array manner with respect to the positioning hole 10, and the magnetic petals 1 and the partition 2 are symmetrically distributed with respect to the motor rotor, and two sets of cut off 2 and be located between two sets of magnetic petals 1, pivot 6, electric motor rotor, end cover 4 and locating pin 5 all are coaxial form, just the profile of locating pin 5 is the hexagon, locating pin 5 is the matching with locating hole 10 and cup joints, the both ends that end cover 4 and locating pin 5 are close to each other are located the circumference lateral wall department of pivot 6 and offer gapped 7, and two sets of clearance 7 is the intercommunication form, the top of end cover 4 is located round hole 9 department and all offers threaded hole 11, just the top of bladed disk 8 is located round hole 9 department and all matches and install screw 12, just the bottom of screw 12 runs through in round hole 9 and is threaded connection with threaded hole 11, blade 13 is installed in the circumference lateral wall matching of bladed disk 8, just blade 13 is annular array distribution about bladed disk 8.

The working principle is as follows: the device is a rotor part of a brushless external rotor motor for a cooling fan, a magnetic petal 1, a partition 2, an end cover 4 and a positioning pin 5 of the rotor are produced into a whole through a secondary or repeated injection molding technology, wherein the magnetic petal 1 is engineering plastics containing magnetic substances and has strong magnetism, the partition 2, the end cover 4 and the positioning pin 5 are the engineering plastics without the magnetic substances, the magnetic petal 1 replaces a magnet part in a traditional external rotor structure, and the magnetic petal 1, the partition 2, the end cover 4 and the positioning pin 5 are directly integrated into a whole rotor structure;

the hexagonal positioning pin 5 and the positioning hole 10 of the device are responsible for positioning the blade disc 8, the assembly accuracy of the blade is improved, the assembly difficulty of the blade is reduced at the same time, the device penetrates through a screw 12 to be locked in a threaded hole 11 in the end cover 4 through a round hole 9 in the blade disc 8, the blade disc 8 and the blade 13 are fixed on the rotor, a gap 7 is reserved in the rotor and the inside of a connecting part of the rotor and the rotating shaft 6, the rotor is manufactured by integral injection molding, the rotating shaft 6 and the rotor are installed in an interference fit mode, and therefore engineering glue filling is conducted through the gap 7 to reinforce the connecting strength and prevent the rotating shaft 6 from falling off.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A plastic magnetic rotor of a cooling fan comprises a motor rotor and is characterized in that the motor rotor is cylindrical, a circular groove (3) is formed in the bottom end of the motor rotor, the circular groove (3) penetrates through the motor rotor along the axial direction of the motor rotor, the motor rotor comprises a magnetic petal (1) and a partition (2), an end cover (4) is arranged at the top end of the motor rotor, a positioning pin (5) is formed in the top end of the end cover (4), a rotating shaft (6) is sleeved on the end cover (4) along the axial direction of the end cover, the rotating shaft (6) penetrates through the motor rotor, the end cover (4) and the positioning pin (5), a leaf disc (8) is installed at the top end of the end cover (4) in a matched mode, a positioning hole (10) is formed in the position, at which the positioning pin (5), of the top end of the leaf disc (8), a circular hole (9) is formed in one side, at the position, of the positioning hole (10), of the top end of the leaf disc (8), and the round holes (9) are distributed in an annular array relative to the positioning holes (10).

2. The plastic-magnetic rotor for the cooling fan according to claim 1, wherein the magnetic lobes (1) and the partitions (2) are symmetrically distributed with respect to the motor rotor, and two groups of partitions (2) are located between two groups of magnetic lobes (1).

3. The plastic-magnetic rotor of the cooling fan according to claim 1, wherein the rotating shaft (6), the motor rotor, the end cover (4) and the positioning pin (5) are coaxial, the positioning pin (5) is hexagonal in outline, and the positioning pin (5) is in matching socket joint with the positioning hole (10).

4. The plastic-magnetic rotor of the cooling fan according to claim 1, wherein gaps (7) are formed at the circumferential side wall of the rotating shaft (6) at the two ends of the end cover (4) and the positioning pin (5) close to each other, and the two groups of gaps (7) are communicated with each other.

5. The plastic-magnetic rotor of a cooling fan according to claim 1, wherein the top end of the end cover (4) at the round hole (9) is provided with a threaded hole (11), the top end of the blade disc (8) at the round hole (9) is provided with a screw (12) in a matching manner, and the bottom end of the screw (12) penetrates through the round hole (9) and is in threaded connection with the threaded hole (11).

6. A plastic-magnetic rotor for a radiator fan according to claim 1, wherein the circumferential side wall of the blisk (8) is fitted with blades (13), and the blades (13) are distributed in an annular array with respect to the blisk (8).