CN202918084U

CN202918084U - Rotor assembly of permanent magnet synchronous motor

Info

Publication number: CN202918084U
Application number: CN 201220559794
Authority: CN
Inventors: 张敬才; 张申
Original assignee: Broad Ocean EV Technology Co Ltd
Current assignee: Broad Ocean EV Technology Co Ltd
Priority date: 2012-10-29
Filing date: 2012-10-29
Publication date: 2013-05-01
Anticipated expiration: 2022-10-29

Abstract

Disclosed in the utility model is a rotor assembly of a permanent magnet synchronous motor. The rotor assembly comprises a rotating shaft, a rotor iron core sleeved outside the rotating shaft and a plurality of permanent magnets. A plurality of installation holes are arranged on the rotor iron core and the permanent magnets are embedded into the installation holes. Besides, a step is arranged on the rotating shaft; a lower end plate is sleeved outside the rotating shaft and is supported on the step; the rotor iron core is supported on the lower end plate; and an upper end plate is pressed on the rotor iron core and is locked by a nut. The provided rotor assembly has advantages of simple structure, simple and convenient installation, improved magnetic circuit performance and lowered cost.

Description

A kind of permanent-magnetic synchronous motor rotor assembly

Technical field:

The utility model relates to a kind of permanent-magnetic synchronous motor rotor assembly.

Background technology:

Traditional permanent-magnetic synchronous motor rotor assembly, as shown in Figure 1, comprise rotating shaft 1, rotor core 2, permanent magnet 3, upper head plate 4 and bottom 5, rotor core 2 is sleeved on outside the rotating shaft 1, permanent magnet 3 is installed in 2 li of rotor cores, offers bolt hole on the rotor core 2, and bolt 6 passes bolt hole and nut 7 locks upper end 4 and bottom plate 5, there is following shortcoming in this structure: 1) offer bolt hole on the rotor core, reduced the magnetic circuit performance; 2) offer bolt hole on the rotor core, and iron core is overrided to form by some punchings, Lamination mould need be opened bolt hole, increases the mould difficulty, improves die cost; 3) rotor assembly assembly technology difficulty is large, and needing increases fixedly punching of frock, and cost is high.

Summary of the invention:

The purpose of this utility model provides a kind of permanent-magnetic synchronous motor rotor assembly, and this is simple in structure, installs simple and easyly, improves the magnetic circuit performance, reduces cost.

The purpose of this utility model is to be achieved by following technical scheme.

A kind of permanent-magnetic synchronous motor rotor assembly, comprise rotating shaft, be sleeved on rotating shaft outer rotor core and some permanent magnets, offer some installing holes on the rotor core, permanent magnet embeds in the installing hole, offer step in the rotating shaft, bottom plate is enclosed within that rotating shaft is outer and be bearing on the step, and rotor core is bearing on the bottom plate, and upper head plate is pressed on the rotor core and by nut check.

On the rotor core described above pressing plate is installed, offers some through holes on the pressing plate, through hole is corresponding with position of mounting hole, and upper head plate is bearing on the pressing plate, and the upper head plate bottom surface is protruded some projections downwards, and projection embeds in the through hole and is pressed on the end face of permanent magnet.

In the rotating shaft described above connecting key is installed, rotor core connects by connecting key and rotating shaft.

Pressing plate described above is installed in the rotating shaft by the opening jump ring.

Permanent magnet described above is divided into two sections.

The utility model beneficial effect compared with prior art is: 1) the utility model saves in punching and opens bolt hole, without the screw assembling, has improved the rotor magnetic circuit performance, make rotor punching mould more simple, reduced die cost, simple in structure, install simple and easyly, improve the magnetic circuit performance; 2) on the rotor core pressing plate is installed, offer some through holes on the pressing plate, through hole is corresponding with position of mounting hole, upper head plate is bearing on the pressing plate, the upper head plate bottom surface is protruded some projections downwards, projection embeds in the through hole and is pressed on the end face of permanent magnet, is convenient to assemble permanent magnet, and permanent magnet is pressed into rotor punching through the end plate groove; 3) in the rotating shaft connecting key is installed, rotor core connects by connecting key and rotating shaft, and reasonable in design is installed fastening.

Description of drawings:

Fig. 1 is the structural representation of prior art;

Fig. 2 is stereogram of the present utility model;

Fig. 3 is exploded view of the present utility model;

Fig. 4 is cutaway view of the present utility model.

Embodiment:

Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.

Embodiment one: extremely shown in Figure 4 such as Fig. 2, the utility model is a kind of permanent-magnetic synchronous motor rotor assembly, comprise rotating shaft 1, be sleeved on rotor core 2 and some permanent magnets 3 outside the rotating shaft 1, offer some installing holes 21 on the rotor core 2, permanent magnet 3 embeds 21 li of installing holes, offers step 11 in the rotating shaft 1, and bottom plate 4 is enclosed within outside the rotating shaft 1 and is bearing on the step 11, rotor core 2 is bearing on the bottom plate 4, and upper head plate 5 is pressed on the rotor core 2 and by nut 6 and locks.

Embodiment two: the basis at embodiment one increases following technical characterictic: rotor core 2 is equipped with pressing plate 7, offer some through holes 71 on the pressing plate 7, through hole 71 is corresponding with installing hole 21 positions, upper head plate 5 is bearing on the pressing plate 7, upper head plate 5 bottom surfaces are protruded some projections 51 downwards, and projection 51 embeds 71 li of through holes and is pressed on the end face of permanent magnet 3.

Embodiment three: the basis at embodiment one or embodiment two increases following technical characterictic: rotating shaft 1 is equipped with connecting key 8, and rotor core 2 connects by connecting key 8 and rotating shaft 1.

Embodiment four: the basis at embodiment two increases following technical characterictic: pressing plate 7 is installed in the rotating shaft 1 by opening jump ring 9.

Embodiment five: the basis at embodiment one increases following technical characterictic: permanent magnet 3 is divided into two sections.

Because the application is mechanical field, the apparent association of ability those of ordinary skill obtains: the technical characterictic independent assortment of the increase that embodiment two, embodiment three, embodiment four and embodiment five mention is combined into new technical scheme with the technical scheme of embodiment one.

Assembling of the present utility model is as follows: first bottom plate 4 is enclosed within rotating shaft 1 outer and be bearing on the step 11 that rotating shaft 1 offers, rotor core 2 is bearing on the bottom plate 4, pressing plate 7 is installed on the rotor core 2 by opening jump ring 9, offer some through holes 71 on the pressing plate 7, installing hole 21 positions of offering on through hole 71 and the rotor core 2 are corresponding, permanent magnet 3 embeds 21 li of installing holes by through hole 71, upper head plate 5 is bearing on the pressing plate 7, upper head plate 5 bottom surfaces are protruded some projections 51 downwards, and projection 51 embeds 71 li of through holes and is pressed on the end face of permanent magnet 3, by nut 6 lockings, save in punching and open bolt hole, without the screw assembling, improved the rotor magnetic circuit performance, make rotor punching mould more simple, reduced die cost, simple in structure, install simple and easyly, improve the magnetic circuit performance.

Claims

1. permanent-magnetic synchronous motor rotor assembly, comprise rotating shaft (1), be sleeved on rotating shaft (1) outer rotor core (2) and some permanent magnets (3), offer some installing holes (21) on the rotor core (2), it is inner that permanent magnet (3) embeds installing hole (21), it is characterized in that: offer step (11) in the rotating shaft (1), bottom plate (4) is enclosed within outside the rotating shaft (1) and is bearing on the step (11), rotor core (2) is bearing on the bottom plate (4), and upper head plate (5) is pressed in rotor core (2) and upward and by nut (6) locks.

2. a kind of permanent-magnetic synchronous motor rotor assembly according to claim 1, it is characterized in that: pressing plate (7) is installed on the rotor core (2), offer some through holes (71) on the pressing plate (7), through hole (71) is corresponding with installing hole (21) position, upper head plate (5) is bearing on the pressing plate (7), upper head plate (5) bottom surface is protruded some projections (51) downwards, and it is inner and be pressed on the end face of permanent magnet (3) that projection (51) embeds through hole (71).

3. a kind of permanent-magnetic synchronous motor rotor assembly according to claim 1 and 2 is characterized in that: connecting key (8) is installed in the rotating shaft (1), and rotor core (2) connects by connecting key (8) and rotating shaft (1).

4. a kind of permanent-magnetic synchronous motor rotor assembly according to claim 2, it is characterized in that: pressing plate (7) is installed in the rotating shaft (1) by opening jump ring (9).

5. a kind of permanent-magnetic synchronous motor rotor assembly according to claim 1, it is characterized in that: permanent magnet (3) is divided into two sections.