CN219287245U

CN219287245U - Stator coil with higher structural strength

Info

Publication number: CN219287245U
Application number: CN202320291326.9U
Authority: CN
Inventors: 贺习海; 张�育
Original assignee: Zhejiang Dingxi New Energy Technology Co ltd
Current assignee: Zhejiang Dingxi New Energy Technology Co ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-06-30
Anticipated expiration: 2033-02-23

Abstract

The utility model discloses a stator coil with higher structural strength, which comprises a coil frame, coils wound on the coil frame and terminals integrally formed on the side part of the coil frame in an injection molding mode, wherein the number of the terminals is at least three, and the terminals are all positioned on the same side of the coil frame. The coil frame and the terminal are integrally injection molded, so that the structure strength is high, and the bending part is arranged on the terminal, thereby greatly improving the convenience of coil winding connection and facilitating automatic winding connection in later stage.

Description

Stator coil with higher structural strength

Technical Field

The utility model relates to the technical field of brushless motors, in particular to a stator coil with higher structural strength.

Background

In power tools, motors commonly used include brush motors and brushless motors. Compared with a brush motor, the brushless motor has no brush, friction force is greatly reduced during operation, operation is smooth, and noise is much lower. In addition, the wear of the brushless motor is mainly on the bearing, and from the mechanical point of view, the brushless motor is almost a maintenance-free motor. The brushless motor forms a magnetic field around the winding coil by changing the alternating frequency and waveform of current waves input to the stator coil of the brushless motor, and the magnetic field drives permanent magnet steel on the rotor to rotate, so that the rotor of the brushless motor rotates. Accordingly, brushless motors are increasingly used in, for example, hand-held power tools.

Stator coil assembly of brushless motor among the prior art can set up terminal conductive part at its lateral part and connect the lead wire and the external wire of coil usually, nevertheless adopt grafting or low temperature welded mode to connect between coil frame and the terminal conductive part, structural strength is relatively poor, produces the bubble easily during low temperature welding, has further influenced the connection effect between terminal conductive part and the coil frame.

Disclosure of Invention

First, the technical problem to be solved

In order to solve the problems, the utility model provides a stator coil which has a simple structure, is convenient for wire-wrapping and has higher connection strength between a terminal and a coil frame.

(II) technical scheme

The stator coil with high structural strength comprises a coil frame, coils wound on the coil frame and terminals integrally formed on the side of the coil frame in an injection molding mode, wherein the number of the terminals is at least three, and the terminals are all positioned on the same side of the coil frame.

In the utility model, the terminal comprises a connecting part assembled with the coil frame, a bending part convenient for winding the coil and an electric connecting area arranged at the end part, wherein the connecting part is positioned at the same side as the bending part.

In the utility model, the bending part is bent towards one side far away from the coil frame, and the connecting part comprises a connecting end, a first bending part and a second bending part.

In the present utility model, the first bending direction is opposite to the second bending direction.

In the utility model, the electric connection area is provided with a through groove.

(III) beneficial effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) The coil frame and the terminal are integrally injection molded, so that the structure strength is high, and the bending part is arranged on the terminal, thereby greatly improving the convenience of coil winding connection and facilitating automatic winding connection in later stage.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a stator coil in embodiment 1;

fig. 2 is a schematic perspective view of the coil frame in embodiment 1.

100. Coil frame 200, terminal 201, connecting portion 2011, connecting end 2012, first bending, 2013, second bending, 202, bending portion 203, electric connection region 2031, and through slot.

Detailed Description

Possible implementations within the scope of the present disclosure may have fewer components, have other components not shown in the drawings, different components, differently arranged components, differently connected components, etc., than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising," "comprising," or "having" and the like means that elements or items preceding the word are meant to be encompassed by the element or item recited following the word and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected" and the like are not limited to the physical or mechanical connection or communication shown in the drawings, but may include connection or communication equivalent thereto, whether direct or indirect. "upper", "lower", "left", "right", "horizontal", "vertical", etc. are only used to indicate a relative positional relationship, which may be changed accordingly when the absolute position of the object to be described is changed.

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

A stator coil with high structural strength as shown in fig. 1-2, wherein the stator coil is composed of a coil frame 100, a plurality of groups of coils wound on the coil frame 100, and terminals 200 integrally injection-molded at the sides of the coil frame 100, and the number of the terminals 200 is three, and the terminals 200 are all located at the same side of the coil frame 100 to facilitate the winding connection of the leads of the coils at a later stage. The coil frame 100 is an insulating member.

Further, the terminal 200 includes a connection portion 201 assembled with the coil frame 100, a bent portion 202 for facilitating the winding connection of the coil, and an electrical connection region 203 provided at an end portion, the electrical connection region being bent downward by 90 ° that is, provided perpendicular to the main body of the terminal 200. The connecting portion 201 is on the same side as the bending portion 202. The bending portion 202 is bent toward a side away from the coil frame 100, and the connecting portion 201 includes a connecting end 2011, a first bend 2012, and a second bend 2013.

Further, the bending direction of the first bend 2012 is opposite to that of the second bend 2013, that is, after the first bend 2012 is bent upward, the second bend 2013 is bent downward by a certain angle, and the sum of the included angles between the first bend 2012 and the second bend 2013 is 180 °.

Further, a through groove 2031 is disposed on the electrical connection area 203, and the through groove 2031 has a circular groove structure. Each group of coils has a lead wire and a corresponding bending part 202 for wire-wrapping, and the number of the groups of coils is six, namely, every two groups of coils are wire-wrapped with one bending part 202, and after wire-wrapping, the terminal is electrically connected with the coils by spot welding.

The coil frame 100 and the terminal 200 are integrally injection molded, so that the structural strength is high, and the bending part 202 is arranged on the terminal 200, so that the convenience of coil winding connection is greatly improved, and automatic winding connection is conveniently carried out in the later stage.

The above examples are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the spirit and scope of the present utility model. Various modifications and improvements of the technical scheme of the present utility model will fall within the protection scope of the present utility model without departing from the design concept of the present utility model, and the technical content of the present utility model is fully described in the claims.

Claims

1. A stator coil with high structural strength,

the method is characterized in that:

the coil comprises a coil frame, coils wound on the coil frame and terminals arranged on the side parts of the coil frame in an integral injection molding mode, wherein the number of the terminals is at least three, and the terminals are all on the same side of the coil frame.

2. The structurally strong stator coil of claim 1, wherein: the terminal comprises a connecting part assembled with the coil frame, a bending part convenient for coil winding connection and an electric connecting area arranged at the end part, wherein the connecting part and the bending part are positioned at the same side.

3. The structurally stronger stator coil of claim 2, wherein: the bending part is bent towards one side far away from the coil frame, and the connecting part comprises a connecting end, a first bending part and a second bending part.

4. A stator coil of relatively high structural strength as claimed in claim 3, wherein: the bending direction of the first bending is opposite to that of the second bending.

5. The structurally stronger stator coil of claim 2, wherein: and the electric connection area is provided with a through groove.