CN210041550U

CN210041550U - Rotor assembly and motor carrying same

Info

Publication number: CN210041550U
Application number: CN201921289923.8U
Authority: CN
Inventors: 叶晓波; 范洪刚
Original assignee: Ningbo Leading Intelligent Equipment Co Ltd
Current assignee: Ningbo Leading Intelligent Equipment Co Ltd
Priority date: 2019-08-10
Filing date: 2019-08-10
Publication date: 2020-02-07
Anticipated expiration: 2029-08-10

Abstract

The utility model provides a rotor subassembly and carry on its motor. The rotor assembly comprises a rotor iron core assembly, a first bearing, a second bearing and a rotating shaft; the rotor core assembly is sleeved with the rotating shaft and rotates coaxially with the rotating shaft, a first bearing sleeved with the rotating shaft is arranged on one side of the rotor core assembly, and a second bearing sleeved with the rotating shaft is arranged on the other side of the rotor core assembly; the rotor core assembly comprises a magnetic ring, a rotor core and a pressing plate, wherein the magnetic ring is sleeved with the rotor core and is positioned on the outer side of the rotor core, the pressing plate is sleeved with the rotating shaft and is fixedly connected with one side end of the rotor core, and the outer diameter of the pressing plate is the same as that of the magnetic ring. The rotor assembly has the functions of rotation prevention and positioning, so that the rotor assembly is quickly assembled during manufacturing. The rotor assembly is simple in manufacturing process, free of baking and high in assembly efficiency.

Description

Rotor assembly and motor carrying same

Technical Field

The utility model relates to a rotor subassembly specifically relates to a stator module that can fast assemble and fix a position and carry on its motor.

Background

Along with the maturity of motor technology, more and more novel motor are used to electric tool in, the most sampling magnetic rings of rotor subassembly of present motor pass through glue and bond at rotor core, and this technology leaks glue in order to prevent the glue of coating, need have the step of toasting, and the rotor subassembly reliability of making like this is poor, and production efficiency. Meanwhile, the rotor assembly of the type is not provided with a stopping and rotating positioning hole, and the later reliability is poor.

SUMMERY OF THE UTILITY MODEL

The purpose of the present invention is to solve at least one of the technical drawbacks. Based on the problem, the utility model provides a rotor subassembly, it has realized rapid Assembly, and this manufacture process simple process does not have and toasts, and assembly efficiency is high. Therefore, the utility model adopts the following technical scheme.

A rotor assembly is characterized by comprising a rotor iron core assembly, a first bearing, a second bearing and a rotating shaft;

the rotor core assembly is sleeved with the rotating shaft and rotates coaxially with the rotating shaft, a first bearing sleeved with the rotating shaft is arranged on one side of the rotor core assembly, and a second bearing sleeved with the rotating shaft is arranged on the other side of the rotor core assembly;

the rotor core assembly comprises a magnetic ring, a rotor core and a pressing plate, the pressing plate is sleeved with the rotating shaft and fixedly connected with one side end of the rotor core, and the magnetic ring is sleeved with the rotor core and located on the outer side of the rotor core.

Preferably, the axial length of the rotor core is consistent with the axial length of the magnetic ring.

Preferably, the inner side of the magnetic ring is provided with at least one bulge protruding towards the radial direction of the magnetic ring.

Preferably, the inner side of the magnetic ring is provided with 2 protruding parts which are symmetrically arranged along the axis.

Preferably, the 2 projections differ in width and height.

Preferably, the ratio of the height of the bulge part to the thickness of the magnetic ring is 0.4-4.

Preferably, the rotor core is sleeved on the rotating shaft and drives the rotating shaft to rotate based on the rotation of the rotating shaft, and at least one groove is arranged in the circumferential direction of the rotor core and used for being connected with the protruding portion on the inner side of the magnetic ring in a matched mode.

Preferably, the rotor core is provided with 2 grooves in the circumferential direction, which are symmetrical along the axis of the rotor core.

Preferably, the 2 grooves differ in width and depth.

Preferably, the ratio of the depth of the groove along the radial direction to the thickness of the rotor core is 0.1-0.7.

Preferably, the outer diameter of the pressure plate is the same as that of the magnetic ring.

The embodiment of the application also provides a motor, which comprises a stator component and the rotor component positioned in the stator component.

For the scheme among the prior art, the utility model discloses an advantage:

the rotor subassembly that this application embodiment provided has the function of preventing changeing and fixing a position, has realized rotor subassembly rapid Assembly. The manufacturing process is simple in process, free of baking and high in assembly efficiency.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic perspective view of a rotor assembly according to an embodiment of the present invention;

fig. 2 is an exploded view of a rotor assembly according to an embodiment of the present invention;

fig. 3 is a schematic view of a magnetic ring structure of a rotor assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the rotor core and the rotating shaft according to the embodiment of the present invention.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Example (b):

a stator assembly of an embodiment of the present invention is described next in conjunction with fig. 1-4. The drawings include schematic diagrams, and the scale and the vertical-to-horizontal ratio of each component may be different from those of the actual components.

Fig. 1 and fig. 2 are schematic structural views of a rotor assembly according to an embodiment of the present invention;

the rotor assembly comprises a rotor core assembly 101, a first bearing 102, a second bearing 103 and a rotating shaft 104; rotor core assembly 101 is nested with pivot 104 and rotates coaxially therewith, and one side of rotor core assembly 101 is equipped with first bearing 102, which is nested with pivot 104, and the other side of rotor core assembly 101 is equipped with second bearing 103, which is nested with pivot 104. The rotor core assembly 101 includes a magnetic ring 101a and a rotor core 101b, and the magnetic ring 101a is sleeved with the rotor core 101b and located outside the rotor core 101 b.

At least one protrusion 101a1 protruding radially inward of the magnet ring 101a is disposed as shown in fig. 3. Preferably, 2 protrusions are disposed inside the magnetic ring 101a, and are disposed symmetrically along the axis. Preferably, the 2 protrusions 101a1 have different widths and heights (in other embodiments, there is no limitation), so that the design can be fool-proof during assembly to prevent errors during assembly. Preferably, the ratio (ratio) of the height of the radially protruding protrusion 101a1 to the thickness of the magnetic ring 101a is 0.4-4.

Preferably, the ratio of the height of the protruding portion 101a1 to the diameter of the magnetic ring 101a is 0.001-0.3. Preferably, the magnetic ring 101a is integrally designed.

Next, a schematic structural diagram of a rotor core mounting and rotating shaft according to an embodiment of the present invention will be described with reference to fig. 4. As shown in fig. 4, the rotor core 101b is sleeved on the rotating shaft 104 and drives the rotating shaft to rotate based on the rotation of the rotating shaft. The rotor core 101b is provided with at least one (1) groove 101b1 in the circumferential direction, and the groove 101b1 matches with the protrusion 101a1 inside the magnetic ring 101 a. Preferably, the rotor core 101b is provided with 2 grooves 101b1 in the circumferential direction, which are symmetrical along the axis. Preferably, the symmetrically disposed grooves 101b1 have different widths and/or depths, which provides fool-proofing during installation. Preferably, the ratio (ratio) of the depth of the groove 101b1 to the thickness of the rotor core 101b is 0.1-0.7. Too deep a depth of the groove 101b1 easily affects the mechanical strength of the rotor core. A pressing plate 101b2 is connected to one end of the rotor core 101 b. The pressing plate 101b2 is fitted around the rotating shaft 104 and connected to one end of the rotor core 101 b. The outer diameter of the pressure plate 101b2 is (substantially) the same as the outer diameter of the magnet ring 101 a. The pressing plate 101b2 is coated with glue on the surface connected to one end of the rotor core 101b, so that the pressing plate 101b2 is firmly connected to the rotor core 101 b. When the rotor assembly is manufactured, the magnetic ring 101a is sleeved on the rotor core, the protruding portion of the magnetic ring is matched and clamped with the groove, the rotation preventing and positioning functions are achieved, and the rotor assembly is rapidly assembled. The manufacturing process is simple in process, free of baking and high in assembly efficiency. Therefore, the problems that glue is easy to leak during gluing during rotor assembly, a baking process is needed, reliability is poor, and efficiency is low are solved, and large-scale production is realized.

In one embodiment, the inner side of the magnetic ring 101a is configured with at least one groove portion radially inward thereof. Preferably, the grooves are symmetrically disposed, and at this time, at least one protrusion is disposed on the rotor core in the circumferential direction, and the protrusion matches with the groove portion inside the magnetic ring 101 a.

In one embodiment, the edge of the pressure plate on the side connected to the rotor core is provided with a plurality of ribs/recesses, and the recesses/ribs matching the configuration of the rotor core and the pressure plate connection, thus achieving a reliable connection of the pressure plate to the rotor core.

In one embodiment, the motor carrying the rotor assembly is used for garden tools or handheld tools, such as a blowing and sucking machine and a mower with a self-driving function, and can also be applied to hammer drill type electric tools.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A rotor assembly is characterized by comprising a rotor iron core assembly, a first bearing, a second bearing and a rotating shaft;

the rotor core assembly comprises a magnetic ring, a rotor core and a pressing plate, the magnetic ring is sleeved with the rotor core and is located on the outer side of the rotor core, the pressing plate is sleeved with the rotating shaft and is fixedly connected with one side end of the rotor core, and the outer diameter of the pressing plate is the same as that of the magnetic ring.

2. The rotor assembly of claim 1 wherein an axial length of the rotor core coincides with an axial length of the magnet ring.

3. The rotor assembly as claimed in claim 1, wherein the inner side of the magnetic ring is provided with at least one protrusion protruding radially therefrom.

4. The rotor assembly as claimed in claim 1, wherein the inner side of the magnetic ring is provided with 2 protrusions arranged symmetrically along the axis.

5. The rotor assembly as claimed in claim 3 or 4, wherein the ratio of the height of the protrusion to the thickness of the magnetic ring is 0.4-4.

6. The rotor assembly as claimed in claim 1, wherein the rotor core is sleeved on the rotating shaft and rotates the rotating shaft based on the rotation of the rotating shaft, and at least one groove is disposed on the circumference of the rotor core and is used for matching with the protrusion on the inner side of the magnetic ring.

7. The rotor assembly of claim 6 wherein 2 slots are circumferentially disposed in the rotor core and are symmetrical about the axis of the rotor core.

8. The rotor assembly of claim 7 wherein the 2 grooves differ in width and/or depth.

9. The rotor assembly of claim 6 wherein the ratio of the depth of the groove along the radial direction to the thickness of the rotor core is 0.1-0.7.

10. An electrical machine comprising a stator assembly and a rotor assembly according to any one of claims 1 to 9 located therein.