CN210985763U

CN210985763U - Rotor

Info

Publication number: CN210985763U
Application number: CN201922274733.5U
Authority: CN
Inventors: 曾细杰
Original assignee: Fujian Huian Kynko Electrical Machinery Co ltd
Current assignee: Fujian Huian Kynko Electrical Machinery Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-07-10
Anticipated expiration: 2029-12-17

Abstract

The utility model provides a rotor, including the rotor shaft, fixedly connected with plastic body on the rotor shaft, plastic body establishes including the cover the epaxial core of rotor and a plurality of with the core is even around establishing for the center tooth portion on the core, be provided with rotor winding on the tooth portion, and adjacent two be provided with between the tooth portion and support the top insulating strip on the rotor winding. Replace traditional iron core through plastic body, need not to lay insulating paper and can directly set up rotor winding on plastic body, the process is simple relatively, and packaging efficiency is higher relatively.

Description

Rotor

Technical Field

The utility model relates to a motor accessory, especially a rotor.

Background

The electric tool is driven mainly by a motor, and the rotor is a main accessory of the motor and is used for converting electric energy into mechanical energy by matching with a stator of the motor.

The existing rotor for the electric tool usually adopts an iron core as a body, in order to avoid the electric conduction between a rotor winding and the iron core, insulation paper is usually required to be laid on the iron core, the process is complex, and the assembly efficiency is relatively low.

In view of the above, the applicant has made an intensive study on the structure of the rotor, and has made this invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an assembly efficiency is higher rotor relatively.

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

a rotor comprises a rotor shaft, wherein a plastic body is fixedly connected to the rotor shaft, the plastic body comprises a core portion and a plurality of tooth portions, the core portion is sleeved on the rotor shaft, the tooth portions are evenly wound on the core portion by taking the core portion as the center, rotor windings are arranged on the tooth portions, and insulation strips abutting against the rotor windings are arranged between every two adjacent tooth portions.

As an improvement of the present invention, the tooth portion includes a radial plate integrally connected to the core and an arc plate connected to the radial plate away from one side of the core.

As an improvement of the present invention, the length of the insulating strip is greater than the length of the plastic body.

As an improvement of the utility model, each the insulating strip all an organic whole is connected or fixed connection is on same support ring.

As an improvement of the utility model, the last fixedly connected with fan that goes back of rotor shaft, the fan is established including the cover the epaxial inner ring of rotor, a plurality of with the inner ring is established for the even cover in center the epaxial blade of inner ring and cladding are each the outer loop of blade, each the blade is fixed connection or an organic whole is in simultaneously on the outer loop.

As an improvement of the utility model, the last fixedly connected with commutator that goes back of rotor shaft, plastic body is located the commutator with between the fan, rotor winding with the commutator electricity is connected.

As an improvement of the utility model, it is equipped with support bearing still to overlap on the rotor shaft, support bearing is located the commutator is kept away from one side of plastic body.

As an improvement of the utility model, the rotor shaft is a plastic shaft, just the rotor shaft with plastic body coupling.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

1. replace traditional iron core through plastic body, need not to lay insulating paper and can directly set up rotor winding on plastic body, the process is simple relatively, and packaging efficiency is higher relatively.

2. Through set up the outer loop on the fan, avoid the unsettled arrangement of blade, stability is better relatively, and the outer loop also can play certain wind-guiding effect simultaneously.

Drawings

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

FIG. 2 is a schematic structural view of the rotor of the present invention without the rotor winding;

fig. 3 is a schematic structural view of the plastic body of the present invention.

The corresponding designations in the figures are as follows:

10-a rotor shaft; 20-a plastic body;

21-a core; 22-a tooth;

22 a-a radial plate; 22 b-an arc;

30-a rotor winding; 40-an insulating strip;

50-a fan; 51-inner ring;

52-a blade; 53-the outer ring;

60-a commutator; 70-support the bearing.

Detailed Description

The utility model is further explained by the following specific embodiments:

as shown in fig. 1 to fig. 3, the rotor provided in this embodiment can be used for a motor rotor of an electric power tool, and includes a rotor shaft 10, where the rotor shaft 10 can be a metal shaft or a plastic shaft, and a plastic body 20 is fixedly connected to the rotor shaft, and in this embodiment, the rotor shaft 10 is taken as an example of a metal shaft, and is fixedly connected to the plastic body 20 by a glue connection or a pin-key fit connection, and it should be noted that, when the rotor shaft 10 is a plastic shaft, the rotor shaft 10 and the plastic body 20 can be integrally connected by injection molding, so that the assembly of the two is not required, which helps to simplify the assembly process.

The plastic body 20 includes a core 21 sleeved on the rotor shaft 10 and a plurality of teeth 22 uniformly wound around the core 21 with the core 21 as a center, wherein the teeth 22 have a cross section of T, and specifically, the teeth 22 include a radial plate 22a integrally connected with the core 21 and an arc plate 22b on a side of the radial plate 22a away from the core 21. The teeth 22 are provided with rotor windings 30, and specifically, the rotor windings 30 are wound on the radial plates 22a in the same manner as a conventional motor rotor for an electric tool, and will not be described in detail herein; the arc-shaped plates 22b prevent the rotor winding 30 from coming off the corresponding radial plates 22 a.

An insulating strip 40 which is abutted against the rotor winding 30 is arranged between two adjacent tooth parts 22, the length of the insulating strip 40 is greater than that of the plastic body 20, and two ends of each insulating strip 40 penetrate out of a groove formed between two corresponding tooth parts 22. Preferably, each insulating strip 40 is integrally or fixedly connected to the same support ring (not shown), so that each insulating strip 40 can be inserted between two corresponding teeth 22 at one time during assembly, and the assembly efficiency is relatively high.

In addition, the rotor shaft 10 is further fixedly connected with a fan 50 and a commutator 60, wherein the fan 50 comprises an inner ring 51 sleeved on the rotor shaft 10, a plurality of blades 52 uniformly sleeved on the inner ring 51 by taking the inner ring 51 as a center, and an outer ring 53 covering each blade 52, and each blade 53 is simultaneously and fixedly connected or integrally connected to the outer ring 53, so that the blades 52 can be prevented from being arranged in a suspended mode, the stability is relatively good, and meanwhile, the outer ring 53 can also play a certain wind guiding role. The plastic body 20 is located between the commutator 60 and the fan 50, and the rotor winding 30 is electrically connected to the commutator 60, and the specific electrical connection structure is the same as that of a conventional motor rotor for a power tool, and will not be described in detail herein.

Preferably, the rotor shaft 10 is further sleeved with a support bearing 70, and the support bearing 70 is located on a side of the commutator 60 far away from the plastic body 20.

The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention according to the prior art, and these all belong to the protection scope of the present invention.

Claims

1. The rotor comprises a rotor shaft and is characterized in that a plastic body is fixedly connected to the rotor shaft and comprises a core portion and a plurality of tooth portions, wherein the core portion is sleeved on the rotor shaft, the tooth portions are uniformly wound on the core portion by taking the core portion as a center, rotor windings are arranged on the tooth portions, and an insulating strip abutting against the rotor windings is arranged between every two adjacent tooth portions.

2. The rotor of claim 1, wherein the teeth comprise a radial plate integrally connected to the core and an arcuate plate connected to a side of the radial plate remote from the core.

3. The rotor of claim 1, wherein the insulating strips have a length greater than a length of the plastic body.

4. A rotor according to any of claims 1-3, wherein the insulating strips are integrally or fixedly attached to the same support ring.

5. A rotor according to any one of claims 1 to 3, wherein a fan is fixedly connected to the rotor shaft, the fan comprises an inner ring fitted over the rotor shaft, a plurality of blades uniformly fitted over the inner ring centering on the inner ring, and an outer ring covering each of the blades, and each of the blades is fixedly connected or integrally connected to the outer ring at the same time.

6. The rotor of claim 5 wherein a commutator is also fixedly attached to the rotor shaft, the plastic body is positioned between the commutator and the fan, and the rotor windings are electrically connected to the commutator.

7. A rotor according to claim 6, wherein a support bearing is further provided on the rotor shaft, the support bearing being located on a side of the commutator remote from the plastic body.

8. A rotor according to any of claims 1-3, wherein the rotor shaft is a plastic shaft and the rotor shaft is integrally connected to the plastic body.