Outer rotor casing with dynamic balance structure and outer rotor motor

Abstract

The utility model provides an external rotor casing with a dynamic balance structure and an external rotor motor, the external rotor casing comprises a casing body, a magnetic steel positioning groove is arranged in the casing body, and two ends of the casing body are respectively fixedly connected with a balance ring. When dynamic balance correction is carried out on the outer rotor of the motor and unbalance occurs, only the cutter needs to cut the balance ring of the outer rotor shell, and internal operation does not need to be carried out like the prior art, so that the dynamic balance can be corrected more quickly, the processing difficulty is reduced, and the dynamic balance correction efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of outer rotor motor, specifically refers to a kind of outer rotor shell with dynamic balance structure and outer rotor motor. BACKGROUND

[0002] At present, high-speed small outer diameter outer rotor brushless motor, for the high-speed rotating outer rotor structure, due to high-speed rotation will generate larger centrifugal force, and the imbalance of parts itself, high-speed rotation will generate larger vibration, vibration will cause noise generation, and greatly affect the life of motor bearing.

[0003] Therefore, the motor outer rotor needs to be dynamically balanced, and the existing correction method is generally to paste balance mud inside the outer rotor shell, so that the outer rotor reaches the balance effect, but this installation method is slow on the one hand, and the processing difficulty is also high on the other hand, which greatly reduces the efficiency of dynamic balance correction. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides an outer rotor shell with dynamic balance structure and outer rotor motor, which can quickly correct dynamic balance and improve the efficiency of dynamic balance correction.

[0005] To solve the above technical problems, the utility model provides an outer rotor shell with dynamic balance structure, which comprises a shell body, a magnetic steel positioning groove is arranged in the inside of the shell body, and a balance ring is fixedly connected to the both ends of the shell body.

[0006] Further, the balance ring is annular, and the outer diameter of the balance ring is the same as that of the shell body.

[0007] Further, the balance ring is fixedly arranged on the shell body by pasting.

[0008] Further, a positioning ring is arranged in the balance ring.

[0009] Further, a magnetic steel clamping groove is arranged on the positioning ring.

[0010] Further, a shaft positioning seat is arranged on the balance ring at the upper end of the shell body, and a shaft through hole is formed in the shaft positioning seat.

[0011] The application also provides an outer rotor motor assembled with the above-mentioned outer rotor shell, which comprises the outer rotor shell as described above, a magnetic steel is fixedly installed in the outer rotor shell through the magnetic steel positioning groove, the outer rotor shell is penetrated by a shaft, and the both ends of the shaft penetrate the outer rotor shell.

[0012] The utility model discloses a kind of outer rotor machine shell and outer rotor motor with dynamic balance structure, with following beneficial effects:

[0013] When unbalance occurs during dynamic balance correction of the motor outer rotor, only need to cut a notch on the balance ring of the outer rotor machine shell by the cutter, without internal operation as now, so that dynamic balance can be corrected faster, reduce the processing difficulty, greatly improve the efficiency of dynamic balance correction. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the structural diagram of the outer rotor machine shell of the utility model.

[0015] Fig. 2 It is the structural diagram of the balance ring of the utility model.

[0016] Fig. 3 It is the structural diagram of the outer rotor machine shell installation magnetic steel and shaft of the utility model.

[0017] In the drawing: 1, machine shell body, 2, balance ring, 3, magnetic steel positioning groove, 4, connecting column, 5, shaft positioning seat, 6, shaft through-hole, 7, positioning ring, 8, magnetic steel clamping groove, 9, shaft, 10, magnetic steel, 11, notch. DETAILED DESCRIPTION

[0018] The following specific embodiments illustrate the embodiments of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.

[0019] It is known that the structure, proportion, size and the like shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and not used to limit the limiting conditions that the utility model can be implemented, so it does not have technical substantive significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects that the utility model can produce and the purposes that the utility model can achieve, should still fall within the scope that the technical content disclosed by the utility model can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear understanding of the description, and not used to limit the scope that the utility model can be implemented, the change or adjustment of relative relationship, without substantially changing the technical content, is also regarded as the scope that the utility model can be implemented.

[0020] Reference Figs. 1-3The utility model provides a kind of outer rotor shell with dynamic balance structure, including shell body 1, the inside of shell body 1 is provided with multiple magnetic steel positioning slot 3 along shell body 1 inner surface, and the distance between every two magnetic steel positioning slot 3 is same.

[0021] Meanwhile, the upper end and the lower end of the shell body 1 are fixedly connected with a balance ring 2, the balance ring 2 is annular,

[0022] and the outer diameter of the balance ring 2 is the same as the outer diameter of the entire shell body 1, so it will not protrude from the shell body 1, causing inconvenience in later assembly, the thickness of the balance ring 2 is greater than or equal to the thickness of the shell body 1, and in this embodiment, the thickness of the two is the same.

[0023] In this embodiment, the two balance rings 2 are fixedly arranged on the upper end and the lower end of the shell body 1 by pasting, specifically, the lower surface of the balance ring 2 located on the upper end of the shell body 1 is fixedly connected with the upper end surface of the shell body 1 by glue, and the upper surface of the balance ring 2 located on the lower end of the shell body 1 is fixedly connected with the lower end surface of the shell body 1 by glue.

[0024] Meanwhile, in order to facilitate the positioning of the balance ring 2, the inner side of the balance ring 2 is provided with a positioning ring 7, the positioning ring 7 is integrally formed with the balance ring 2, and the height of the positioning ring 7 is greater than the height of the balance ring 2, the outer diameter of the positioning ring 7 is the same as the inner diameter of the shell body 1, so the balance ring 2 can be easily positioned, and in order to improve the connection strength, the outer surface of the positioning ring 7 is also coated with glue between the shell body 1.

[0025] The surface of the positioning ring 7 away from the end of the shell body 1 is provided with a magnetic steel clamping groove 8, and the number of the magnetic steel clamping groove 8 is the same as the number of the magnetic steel positioning slot 3, the width of the magnetic steel clamping groove 8 is adapted to the width of the magnetic steel, and the upper and lower ends of the magnetic steel 10 can be clamped through the magnetic steel clamping grooves on both sides, so as to improve the fixing firmness of the magnetic steel 10.

[0026] In this embodiment, a shaft positioning seat 5 is arranged on the balance ring 2 located on the upper end of the shell body 1, specifically, a plurality of connecting columns 4 are arranged on the balance ring 2 and directed to the center of the balance ring 2, one end of the connecting column 4 is arranged on the balance ring 2, and the other end is connected with the shaft positioning seat 5, the connecting column 4 is integrally arranged with the balance ring 2, the shaft positioning seat 5 is also integrally arranged with the connecting column 4, and a shaft through hole 6 for the shaft to pass through is arranged on the shaft positioning seat 5.

[0027] Meanwhile, the embodiment further provides an outer rotor motor provided with the outer rotor shell, which comprises the outer rotor shell, the outer rotor shell is fixedly provided with the magnetic steel 10 through the magnetic steel positioning groove 3, the outer rotor shell is penetrated by the rotating shaft through the rotating shaft through hole, and the two ends of the rotating shaft are both penetrated through the outer rotor shell.

[0028] As shown in Fig. 3 the embodiment, in specific use, when the dynamic balance of the motor outer rotor is corrected, only the cutting of the notch 11 on the balance ring 2 by the cutter is needed when imbalance occurs, so that the dynamic balance can be corrected more quickly, and the efficiency of the dynamic balance correction is greatly improved.

[0029] The above embodiment only exemplarily illustrates the principle and effect of the utility model, and is not used for limiting the utility model. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. An outer rotor casing with dynamic balancing structure, characterized by : Including the casing body, the inside of casing body is equipped with magnet steel positioning slot, both ends of casing body are fixedly connected with balance ring, balance ring can be provided with cutout; Balance ring is provided with a circle positioning ring; Positioning ring is provided with magnet steel clamping groove.

2. The outer rotor casing with dynamic balancing structure according to claim 1, characterized in that : Balance ring is annular, and the outer diameter of balance ring is same with the outer diameter of casing body.

3. The outer rotor housing with dynamic balancing structure according to claim 1, characterized in that : Balance ring is fixedly arranged on casing body by pasting.

4. The outer rotor housing with dynamic balancing structure according to claim 1, characterized in that : Balance ring on the upper end of casing body is provided with rotating shaft positioning seat, rotating shaft positioning seat is provided with rotating shaft through hole.

5. An outer rotor electric machine incorporating the outer rotor machine housing according to any one of claims 1 to 4, characterized by : Including the outer rotor casing, the magnet steel is fixedly installed in outer rotor casing through magnet steel positioning slot, and the rotating shaft is provided through rotating shaft through hole in outer rotor casing.

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