CN1332492C - The structure of the magnetic conductive sheet of the motor stator is composed of a single magnetic conductive sheet - Google Patents

Abstract

The invention discloses a magnetic conductive sheet structure of a motor stator formed by a single magnetic conductive sheet, which comprises a magnetic pole sheet, a plurality of magnetic pole surfaces and an axle hole. Wherein the magnetic pole piece, the magnetic pole surface and the shaft hole are formed on a single magnetic conduction piece; the magnetic pole piece is used as a base of the stator and is combined with a coil; the magnetic pole surface is formed by punching a single magnetic conductive sheet bar and is annularly arranged around the shaft hole and close to the coil; the shaft hole is combined with a fixed seat for supporting a rotor. By utilizing the magnetic conductive sheet, the whole motor has the functions of simplifying the whole structure, reducing the manufacturing cost and reducing the whole thickness.

Description

The structure of the magnetic conductive sheet of the motor stator is composed of a single magnetic conductive sheet

technical field

The invention relates to a structure of a magnetically conductive sheet composed of a single magnetically conductive sheet for a motor stator, more specifically, to a magnetic pole piece, a magnetic pole surface, a shaft hole and a base formed by stamping a single magnetically conductive sheet to form a motor stator, and Reduce the number of motor stator components, reduce the overall thickness and simplify the magnetic structure of the motor structure

Background technique

A traditional axially wound motor stator, as shown in FIG. 1 , usually includes an upper pole piece set 10 a , a lower pole piece set 10 b , a coil 20 , a stator seat 21 and a metal shaft tube 22 . Wherein, the upper pole piece group 10a and the lower pole piece group 10b are respectively assembled on the upper and lower sides of the stator base 21, and are respectively provided with at least one magnetic pole piece 11a, 11 and at least one magnetic pole surface 12a, 12b; the coil 20 is wound In the stator seat 21; and the metal shaft tube 22 passes through an axial hole 13b of the upper pole piece group 10a in sequence, a central hole 23 of the stator seat 21 and a shaft hole 13b of the lower pole piece group 10b, so that the above-mentioned components Combined into a motor stator. Since the stacking combination of the motor stator components will inevitably increase the axial thickness and the number of components is too large, the overall thickness of the motor cannot be effectively reduced and the overall volume cannot be effectively reduced, so it is not suitable for ultra-thin and precise electronic devices. , such as a laptop.

In view of this, the creators of this invention rely on their many years of experience and practice in related industries, and after painstaking research and development, they finally created a single magnetic-conducting sheet to stamp the magnetic pole piece, magnetic pole surface and shaft hole of the motor stator. , and the magnetic pole piece is used as the stator base to carry the stator components such as coils and circuit boards, thus effectively reducing the number and overall thickness of the stator components, simplifying the overall structure and reducing the manufacturing cost of the magnetic conductive sheet.

Contents of the invention

In the present invention, the structure of the motor stator composed of a single magnetic plate is mainly to solve the problem that the existing motor stator has too many components, which leads to the problem that the overall thickness of the motor is too thick and the overall volume is too large.

The secondary purpose of the magnetic sheet structure of the motor stator composed of a single magnetic conductive sheet in the present invention is to provide a magnetic pole piece formed by punching the magnetic conductive sheet, and the magnetic pole piece is also used as the base of the motor stator to carry the coil and the circuit Stator components such as plates enable the present invention to simplify the overall structure of the motor stator and reduce manufacturing costs.

In the present invention, the structure of the magnetically conductive sheet composed of a single magnetically conductive sheet for the motor stator includes a magnetic pole piece, several magnetic pole surfaces and a shaft hole, wherein the magnetic pole piece, the magnetic pole surface and the shaft hole are formed on a single magnetically conductive sheet; The magnetic pole piece is used as the base of the stator for combining a coil and carrying at least one motor component. The motor component includes a circuit board; on the coil; and the shaft hole is combined with a fixed seat for supporting a rotor.

The overall thickness and overall volume of the motor can be effectively reduced by using the magnetically conductive sheet in the present invention, and the overall structure of the motor stator can be simplified and the manufacturing cost can be reduced.

Description of drawings

The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a three-dimensional exploded view of a stator of a traditional axially wound motor;

Fig. 2 is a three-dimensional structure diagram of a magnetic conductive sheet constituting a motor stator by a single magnetic conductive sheet in the first embodiment of the present invention;

Fig. 3 is a cross-sectional view of a motor stator composed of a single magnetic conductive sheet in the first embodiment of the present invention after the combination of the magnetic conductive sheet and the motor rotor;

Fig. 4 is a three-dimensional structure diagram of a magnetic conductive sheet of a motor stator composed of a single magnetic conductive sheet in the second embodiment of the present invention:

5 is a cross-sectional view of the first combination of the magnetic conductive sheet and the motor rotor composed of a single magnetic conductive sheet for the motor stator in the second embodiment of the present invention;

6 is a cross-sectional view of the second combination of the magnetic conductive sheet and the motor rotor composed of a single magnetic conductive sheet for the motor stator in the second embodiment of the present invention;

Fig. 7 is a cross-sectional view of the third combination of the magnetic conductive sheet and the motor rotor composed of a single magnetic conductive sheet for the motor stator in the second embodiment of the present invention;

Fig. 8 is a three-dimensional structure diagram of a magnetic conductive sheet of a motor stator composed of a single magnetic conductive sheet in the third embodiment of the present invention;

Fig. 9 is a cross-sectional view of a motor stator composed of a single magnetic conductive sheet in a third embodiment of the present invention after the magnetic conductive sheet is combined with the motor rotor;

Fig. 10 is a three-dimensional structure diagram of a magnetic conductive sheet of a motor stator composed of a single magnetic conductive sheet in the fourth embodiment of the present invention;

Fig. 11 is a cross-sectional view of a motor stator composed of a single magnetic conductive sheet in a fourth embodiment of the present invention after the magnetic conductive sheet is combined with the motor rotor.

Detailed ways

As shown in FIG. 2 and FIG. 3 , in the present invention, a single magnetic conductive sheet constitutes the magnetic conductive sheet of the motor stator, which includes a magnetic pole piece 11 , several magnetic pole surfaces 12 and a shaft hole 13 . The pole piece 11 , the pole surface 12 and the shaft hole 13 are formed on a single magnetically conductive piece 10 . The magnetic pole piece 11 is used as the base of the stator to combine a coil 20; the plurality of magnetic pole faces 12 are stamped and formed by the single magnetically conductive sheet 10, and are arranged around the shaft hole 13 and next to the coil 20; and the shaft hole 13 can be combined with a fixing seat 24 for supporting the rotor 30 . Therefore, when the present invention utilizes the single magnetic conductive sheet 10 to assemble a motor stator, the number and axial thickness of the motor stator components can be effectively reduced, and the purpose of simplifying the overall structure of the motor can be achieved at the same time.

As shown in Fig. 2 and Fig. 3, the structure of the single magnetic permeable sheet 10 in the first embodiment of the present invention is disclosed in these two figures. The single magnetic sheet 10 is stamped from a metal plate with magnetic permeability, and includes a magnetic pole piece 11 , several magnetic pole surfaces 12 and a shaft hole 13 . The main body of the single magnetic conductive piece 10 forms a magnetic pole piece 11, and the magnetic pole piece 11 can be used as the base of the motor stator at the same time, for carrying and accommodating various stator components of the motor, such as a coil 20 wound in the axial direction and A circuit board 26; the plurality of pole faces 12 are formed by vertical punching and bending of the pole pieces 11, and are arranged around the shaft holes 13 at equal intervals; and the shaft holes 13 are formed in the center of the pole pieces 11, so that A fixed seat 24 and a bearing 25 are assembled. A stator is composed of the above components, and a shaft 31 of a rotor 30 is pivoted through a bearing 25, and the permanent magnet 32 of the rotor 30 can be arranged on the outside or inside of the magnetic pole surface 12 according to requirements, and the permanent magnet 32 Correspondingly, the coil 20 is correspondingly arranged on the other side of the magnetic pole surface 12, so that a radial air gap of predetermined size can be formed between the permanent magnet 32 and the magnetic pole surface 12, so that the coil 20 is driven by the circuit board 26 When the circuit is driven to generate alternating excitation, each magnetic pole surface 12 can generate an alternating magnetic field in the radial air gap, thereby driving the rotor 30 to rotate.

In the first embodiment of the present invention, at least one hole 14 can also be selectively formed on the pole piece 11 between the circuit board 26 and the pole surface 12, so that a lead 261 of the circuit board 26 can extend outwards to the rotor through the hole 14 30 below the permanent magnet 32, so that an inductive element 262 is arranged in the punching slot corresponding to the magnetic pole surface 12, so that the inductive element 262 can be close to the permanent magnet 32 during operation to detect the change of polarity. In addition, the shaft hole 13 can also extend vertically upwards, that is, when the magnetic permeable sheet 10 is stamped, the integrated fixing seat 24 is directly stamped at the same time, so as to further reduce the number of stator components.

As shown in Figures 4 to 7, the single magnetically conductive sheet 10 in the second embodiment of the present invention is further provided with a set of magnetic pole faces 12' compared with that in the first embodiment. , the magnetic pole surface 12' is formed by punching and bending the ring edge of the shaft hole 13 vertically upwards, and is arranged around the shaft hole 13 at equal intervals, that is, the magnetic pole surfaces 12 and 12' are respectively arranged at equal intervals around the shaft hole 13 on two concentric circles, thereby forming a set of inner magnetic pole faces 12' and a set of outer magnetic pole faces 12. At the same time, the two sets of magnetic pole faces 12, 12' are optionally arranged in a radially staggered or radially corresponding manner. In this way, the present invention can improve the design of the motor stator through the multi-layer magnetic pole surface arrangement of the magnetic pole surfaces 12, 12'. As shown in Fig. 5, the motor is designed to install the coil 20 on the inner side of the magnetic pole surface 12 according to the requirements, and choose to assemble a rotor 30 with a larger diameter, and the permanent magnet 32 of the rotor 30 can be rotatably arranged on the magnetic pole surface. 12, the alternating magnetic field generated by the magnetic pole surface 12 can drive the rotor 30 to rotate. As shown in Figure 6, the motor stator can also install the coil 20 on the inner side of the magnetic pole surface 12' according to the requirements, and choose to assemble a rotor 30 with a smaller diameter. The permanent magnet 32 of the rotor 30 can rotate on the two magnetic pole surfaces. between 12 and 12', and the alternating magnetic field generated by the magnetic pole surface 12' can also drive the rotor 30 to rotate; An axial permanent magnet 32' is used to form an axial air gap. In this way, the axial permanent magnet 32' can also induce the axial magnetic field formed by the magnetic pole surfaces 12, 12' to drive the rotor 30 to rotate.

As shown in FIG. 5 , the wires 261 of the circuit board 26 in the second embodiment of the present invention can directly extend outward to the bottom of the permanent magnet 32 of the rotor 30 through the stamping slot corresponding to the magnetic pole surface 12 ′, so as to set the induction element 262 In the stamping slot corresponding to the magnetic pole surface 12; as shown in FIG. or as shown in FIG. 7 , the inductive element 262 is directly disposed on the surface of the circuit board 26 to sense the polarity change of the axial permanent magnet 32 ′.

As shown in Figure 8 and Figure 9, the single magnetically conductive sheet 10 in the third embodiment of the present invention is compared with the magnetically conductive sheet in the first and second embodiments, and the single magnetically conductive sheet 10 in the third embodiment is further added There are several axial pole faces 121 . The axial magnetic pole surface 121 is formed by punching the magnetic pole surface 12 vertically extending inward, and the single magnetic permeable sheet 10 is not only suitable for the radial air gap motors of the first and second embodiments, but also suitable for axial air gap motors . As shown in FIG. 9, the axial magnetic pole surface 121 can face an axial permanent magnet 32' of a rotor 30 to form an axial air gap, and the axial permanent magnet 32' can induce the axial magnetic pole surface 121 of the stator. The formed axial magnetic field drives the rotor 30 to rotate.

As shown in Figure 10 and Figure 11, the single magnetically conductive sheet 10 in the fourth embodiment of the present invention is compared with the single magnetically conductive sheet 10 in the third embodiment, and the single magnetically conductive sheet 10 in the fourth embodiment The axial magnetic pole surface 122 is directly formed by punching and bending the magnetic pole surface 12 outward vertically. The single magnetic permeable sheet 10 is also suitable for radial and axial air gap motors. As shown in FIG. 11 , the axial pole surface 122 can face the axial permanent magnet 32' that induces the rotor 30 to drive the rotor 30 to rotate.

As shown in Figure 9 and Figure 11, when the single magnetic permeable sheet 10 in the third and fourth embodiments of the present invention is used in an axial air gap motor, the circuit board 26 can be directly provided with an induction element 262 on the front side, so that the motor During operation, the permanent magnet 32 is brought close to detect the change of its polarity.

As shown in Fig. 1 and Fig. 2, what shown in Fig. 2 is the magnetic-conductive sheet that constitutes the motor stator by a single magnetic-conductive sheet among the present invention, and it utilizes single magnetic-conductive sheet 10 stamping to form the magnetic pole piece 11 of motor stator, counting magnetic pole The surface 12 and the shaft hole 13, and the pole piece 11 can be used as the base of the motor stator to carry other motor components. Compared with the traditional motor stator shown in FIG. 1 , it has the functions of simplifying the overall structure, reducing the manufacturing cost, and reducing the overall thickness.

Although a number of preferred embodiments in the present invention have been described above, it can not be regarded as the protection scope of the present invention, that is, it should be clear to those of ordinary skill in the art that it can be used without departing from the design spirit of the present invention. Equivalent changes and modifications are made, therefore, all equivalent changes and modifications made without departing from the design spirit of the present invention shall be deemed to fall within the protection scope of the present invention.

Claims (15)

1. one kind constitutes the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet, and it comprises:

One pole piece, this pole piece is made by a single magnetic conduction sheet, and can be used as the pedestal of stator, with in conjunction with a coil, reaches at least one motor component of carrying, and this motor component comprises a circuit board;

Several magnetic pole strengths, these several magnetic pole strengths are bent to form around pole piece by this single magnetic conduction sheet punching press; And an axis hole, this axis hole is formed on the middle position of this pole piece.

2. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 1, it is characterized in that: described magnetic pole strength is equally spaced being arranged around around the described axis hole.

3. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 1, it is characterized in that: described magnetic pole strength includes one group of internal magnetic pole face and one group of outer magnetic pole face, and these two groups of equally spaced Arranged ringses of magnetic pole strengths difference are on two concentric circless of described axis hole.

4. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 3, it is characterized in that: described internal magnetic pole face and outer magnetic pole face are radially and are crisscross arranged.

5. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 3, it is characterized in that: described internal magnetic pole face is radially corresponding setting with the outer magnetic pole face.

6. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 1, it is characterized in that: the further vertical extent of described magnetic pole strength forms an axial magnetic pole-face, this axial magnetic pole-face can be in the face of an axial permanent magnet of a rotor, so that the axial magnetic field that this permanent magnet induction stator shaft orientation magnetic pole strength forms.

7. must construct according to the magnetic conduction that constitutes motor stator by single magnetic conduction sheet described in the claim 6, it is characterized in that: described magnetic pole strength inwardly vertically is bent to form.

8. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 6, it is characterized in that: described magnetic pole strength outwards vertically is bent to form.

9. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 1, it is characterized in that: described coil groups is located at the inboard of several magnetic pole strengths.

10. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 1, it is characterized in that: described coil groups is located at the outside of several magnetic pole strengths.

11. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 3, it is characterized in that: described coil groups is located at the inboard of internal magnetic pole face.

12. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 1, it is characterized in that: described axis hole can be in conjunction with one for ccontaining one holder that is used to articulate the bearing of a rotor.

13. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 1, it is characterized in that: described axis hole includes by the pole piece vertical extent that makes progress and forms the holder of one.

14. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 13, it is characterized in that: described pole piece is provided with a hole in addition at least, this hole is used to wear a lead of described circuit board, to extend out to the below of rotor one permanent magnet, be used to be provided with a sensing element simultaneously.

15. according to constituting the magnetic conduction sheet structure of motor stator by single magnetic conduction sheet described in the claim 14, it is characterized in that: described sensing element is arranged in the punching press short slot of magnetic pole strength correspondence.

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