CN217883007U

CN217883007U - Motor rotor magnetic sheet fixing device

Info

Publication number: CN217883007U
Application number: CN202220375618.6U
Authority: CN
Inventors: 王庆海
Original assignee: Jiangxi Seitaiwei Automation Equipment Co ltd
Current assignee: Jiangxi Seitaiwei Automation Equipment Co ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-11-22
Anticipated expiration: 2032-02-23

Abstract

The utility model relates to a motor rotor magnetic sheet fixing device, including end cover, holder, iron ring and permanent magnet, the holder includes end cover and a plurality of centre gripping tooth, the end cover is the annular, a plurality of centre gripping tooth one end is fixed in on the end cover, the other end extends to the outside, and is adjacent the centre gripping tooth forms the centre gripping groove, the permanent magnet set up in the centre gripping inslot, and with the holder forms one and attaches the magnet, the end cover detains to be located the iron ring tip, and with the iron ring forms and holds the chamber, attach the magnet set up in hold the intracavity, and with the end cover passes through connection structure and connects, through separately setting up end cover and holder, can avoid because of milling the high volume processing expense that produces, secondly when the end cover is damaged, can use other end covers to cooperate original holder to improve the interchangeability of this design, secondly come out through the independent molding of moulding plastics, not only production efficiency is higher than milling, and its cost also is less than milling process.

Description

Motor rotor magnetic sheet fixing device

Technical Field

The utility model relates to a brushless motor technical field, in particular to electric motor rotor magnetic sheet fixing device.

Background

In recent years, due to the large-scale research and development of brushless dc motors and the gradual maturity of technologies, the distribution range of the driving systems in industrial production is expanded, the brushless dc motors become the mainstream of industrial motors, the research and the attempt around reducing the production cost and improving the operation efficiency have achieved significant benefits, and various manufacturers also provide motors with different models to meet the requirements of different driving systems, and the brushless dc motors are involved in industrial production such as textile, metallurgy, printing, automatic production lines, numerical control machines and the like at the present stage.

In the production process of part of the outer rotor brushless motor, magnetic sheets are required to be attached to an iron ring uniformly with gaps, the conventional production process mainly depends on milling of a fixing groove on an aluminum alloy rotor structural member to fix a permanent magnet, and although the precision is high, if milling is relied on, the processing cost is necessarily high.

SUMMERY OF THE UTILITY MODEL

In order to compensate the above deficiency, the utility model provides an electric motor rotor magnetic sheet fixing device to solve the technical problem that milling process aluminum alloy rotor makes manufacturing cost uprise.

The technical scheme of the utility model is that: the utility model provides an electric motor rotor magnetic sheet fixing device, includes end cover, holder, iron ring and permanent magnet, the holder includes foundation ring and a plurality of centre gripping tooth, the foundation ring is the annular, a plurality of centre gripping tooth one end is fixed in on the foundation ring, the other end extends to the outside, and is adjacent the centre gripping tooth forms the centre gripping groove, the permanent magnet set up in the centre gripping inslot, and with the holder forms one and attaches the magnet, the end cover is detained and is located iron ring tip, and with the iron ring forms and holds the chamber, attach the magnet set up in hold the intracavity, and with the end cover passes through connection structure and connects.

Compared with the prior art, the beneficial effects of the utility model are that: through setting up end cover and holder separately, can avoid the high-priced processing expense that produces because of milling, secondly when the end cover is damaged, can use other end covers to cooperate original holder to improve the interchangeability of this design, secondly come out through moulding plastics independent molding, not only production efficiency is higher than milling, and its cost is also lower than milling.

Preferably, the spacing width between adjacent clamping grooves is the same as the width of the permanent magnet.

As a preferable technical scheme, the connecting structure comprises a protrusion arranged on the inner side wall of the bottom ring and a connecting ring arranged on the inner side of the end cover, the bottom of the connecting ring is fixed on the end cover, a convex buckle extending outwards is arranged at the top of the connecting ring, and the protrusion can be clamped on the convex buckle in a matched mode and connects the retainer with the end cover.

Preferably, at least one of the protrusion and the buckle is made of rubber.

As a preferred technical solution, the connecting ring and the end cap are concentrically arranged.

Preferably, the iron ring and the end cover are fixed by welding.

Preferably, the end of the extending end of the clamping tooth is provided with a chamfer.

Drawings

FIG. 1 is an exploded view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall assembly structure of the present invention;

fig. 3 is a schematic view of the assembled cross-section structure of the present invention;

fig. 4 is an enlarged schematic structural diagram of a position a in the present invention.

In the figure, 1, an end cover; 2. a cage; 3. an iron ring; 4. a permanent magnet;

101. a connecting ring; 102. a convex buckle; 201. a bottom ring; 202. clamping teeth; 203. a clamping groove; 204. and (4) protruding.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example 1: the utility model provides a technical scheme does:

a motor rotor magnetic sheet fixing device comprises an end cover 1, a retainer 2, an iron ring 3 and a permanent magnet 4, wherein the retainer 2 comprises a bottom ring 201 and a plurality of clamping teeth 202, the bottom ring 201 is annular, one end of each clamping tooth 202 is fixed on the bottom ring 201, the other end of each clamping tooth 202 extends outwards, each clamping tooth 202 is adjacent to the corresponding clamping groove 203, the permanent magnet 4 is arranged in the corresponding clamping groove 203 and forms an auxiliary magnet with the retainer 2, it can be understood that the permanent magnet 4 is arc-shaped, the retainer 2 is circular, the curvature radius of the retainer 2 is the same as that of the permanent magnet 4, the other clamping groove 203 accommodates a permanent magnet 4, namely the width of the clamping groove 203 is the same as that of the permanent magnet 4, the end cover 1 is buckled at the end of the iron ring 3 and forms an accommodating cavity with the iron ring 3, the auxiliary magnet is arranged in the accommodating cavity and connected with the end cover 1 through a connecting structure, the end cover 1 and the retainer 2 are separately arranged, high machining cost caused by milling can be avoided, and then when the end cover 1 is damaged, other end covers 1 can be used for carrying out original matching, and the design of the retainer 2 can be improved.

As a preferred technical solution, the connecting structure includes a protrusion 204 disposed on an inner side wall of the bottom ring 201, and a connecting ring 101 disposed on an inner side of the end cap 1, and a bottom of the connecting ring 101 is fixed on the end cap 1, it can be understood that the connecting ring 101 is disposed concentrically with the end cap 1, a convex buckle 102 extending outward is disposed at a top of the connecting ring 101, the protrusion 204 can be fittingly clamped on the convex buckle 102 and connect the holder 2 with the end cap 1, and at least one of the protrusion 204 and the convex buckle 102 is made of rubber.

It can be understood that the bulge 204 or the convex buckle 102 made of rubber is buckled to form a structure with good sealing performance, so that noise transmission is reduced, and secondly, if the retainer 2 or the end cover 1 has defects, the structure designed separately can be effectively replaced quickly, so that the design is more reasonable.

As a preferable technical scheme, the iron ring 3 and the end cover 1 are fixed by welding.

Preferably, the extended end of the clamping tooth 202 is provided with a chamfer.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a motor rotor magnetic sheet fixing device, includes end cover, holder, iron ring and permanent magnet, its characterized in that: the holder includes foundation ring and a plurality of centre gripping tooth, the foundation ring is the annular, a plurality of centre gripping tooth one end is fixed in on the foundation ring, the other end extends to the outside, and is adjacent centre gripping tooth forms the centre gripping groove, the permanent magnet set up in the centre gripping inslot, and with the holder forms one and attaches the magnet, the end cover is detained and is located iron ring tip, and with the cavity is held in the iron ring formation, attach the magnet set up in hold the intracavity, and with the end cover passes through connection structure and connects.

2. A magnetic sheet holding device for a rotor of an electric motor according to claim 1, wherein: the spacing width of the adjacent clamping grooves is the same as the width of the permanent magnet.

3. A magnetic sheet fixing device for a rotor of an electric motor as claimed in claim 1, wherein: the connecting structure comprises a bulge arranged on the inner side wall of the bottom ring and a connecting ring arranged on the inner side of the end cover, the bottom of the connecting ring is fixed on the end cover, a convex buckle extending outwards is arranged at the top of the connecting ring, and the bulge can be clamped on the convex buckle in a matched mode and connects the retainer with the end cover.

4. A magnetic sheet holding device for a rotor of an electric motor according to claim 3, wherein: at least one of the protrusion and the convex buckle is made of rubber.

5. A magnetic sheet fixing device for a rotor of an electric motor as claimed in claim 3, wherein: the connecting ring and the end cover are concentrically arranged.

6. A magnetic sheet holding device for a rotor of an electric motor according to claim 1, wherein: the iron ring and the end cover are fixed through welding.

7. A magnetic sheet holding device for a rotor of an electric motor according to claim 1, wherein: and the end part of the extending end of the clamping tooth is provided with a chamfer.