Dustproof structure of direct-current brushless outer rotor motor

Abstract

The utility model relates to a dustproof structure, which belongs to the technical field of external rotor motors, in particular to a dustproof structure of a direct-current brushless external rotor motor, which comprises a base, a linkage shaft rotatably mounted on the top wall surface of the base, a positioning rod fixedly mounted on the side wall of the linkage shaft, and a stator winding fixedly mounted on the outer side wall of the positioning rod. An outer rotor shell is fixedly installed at the top end of the linkage shaft, and a dustproof assembly is arranged at the top of the base and comprises a protection frame, a fixing frame, a dust discharging groove and a positioning ring. According to the utility model, the gap between the bottom end of the outer rotor shell and the base is filled through the positioning ring, the positioning ring is arranged in the dust discharge groove, the side wall of the positioning ring and the side wall of the dust discharge groove are inclined, and the bottom end of the dust discharge groove is communicated with the outside, so that dust can slide downwards along the side wall of the positioning ring and is discharged; the condition that dust is accumulated between the protection frame and the outer rotor shell is avoided; the problem that dust is accumulated between the outer rotor and the base in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to outer rotor motor technical field, especially a dustproof structure of direct current brushless outer rotor motor. BACKGROUND

[0002] The outer rotor motor is a kind of motor, and there is gap between the outer rotor in the outer rotor motor and base, dust is easily gathered in the gap, which can affect the performance of the motor for a long time.

[0003] According to the patent with the patent number CN219513882U of China, a kind of outer rotor motor with dustproof structure is disclosed, including motor body, the motor body includes base and the outer rotor rotationally arranged relative to the base;Wherein, the outer wall of the outer rotor is radially inwardly provided with annular groove, the bottom angle of the annular groove is 90 °;The patent is provided with annular groove on the outer wall of the outer rotor, so that the outer rotor motor is in operation, with the rotation of the outer rotor, dust will be gathered in the annular groove, prevent dust from the gap between the outer rotor and base into the motor interior, reduce the maintenance cost of the outer rotor motor, and improve the service life.

[0004] In the above prior art, annular groove is provided on the outer wall of the outer rotor, so that the outer rotor motor is in operation, with the rotation of the outer rotor, dust will be gathered in the annular groove, prevent dust from the gap between the outer rotor and base into the motor interior, but in the process of actual use, since the bottom of annular groove is sealed, dust gradually accumulates in its interior, leading to increasing internal dust, dust can contact with the side wall of the outer rotor, and then can affect the service life of the motor. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems, the utility model provides a dustproof structure of direct current brushless outer rotor motor, the gap between the bottom end of outer rotor shell and base is filled by positioning ring, the positioning ring is arranged in the dust removal groove, the side wall of the positioning ring is inclined like the side wall of the dust removal groove, the bottom end of the dust removal groove is communicated with the outside, dust will slide down along the side wall of the positioning ring and be discharged, to avoid the situation that dust accumulates between the protective frame and the outer rotor shell.

[0006] The technical solution for achieving the purpose of the utility model is as follows: a dustproof structure of direct current brushless outer rotor motor, including base, the top wall surface of the base is rotationally installed with linkage shaft, the side wall of the linkage shaft is fixedly installed with positioning rod, the outer side wall of the positioning rod is fixedly installed with stator winding, the top end of the linkage shaft is fixedly installed with outer rotor shell, the top of the base is provided with dustproof assembly, the dustproof assembly comprises;

[0007] The protective frame is arranged on the top of the base and wraps the outer rotor shell, and the fixing frame is fixedly arranged on the bottom wall of the base and the top end of the fixing frame is fixedly arranged on the outer side wall of the protective frame.

[0008] The dust discharging groove is arranged on the side wall of the protective frame and the base.

[0009] The positioning ring is fixedly arranged on the bottom wall of the outer rotor shell.

[0010] In some embodiments, the inner side wall of the dust discharging groove is inclined, the bottom end of the positioning ring is arranged in the dust discharging groove, and the inner side wall of the positioning ring is attached to the corresponding side wall of the base.

[0011] In some embodiments, a plurality of reinforcing rings are fixedly arranged on the bottom wall of the positioning ring at equal intervals, and the inner side wall of the reinforcing ring is attached to the side wall of the base.

[0012] In some embodiments, the side wall of the reinforcing ring is rotatably arranged with a movable ball, the outer side wall of the base is arranged with a positioning ring groove aligned with the movable ball, and the movable ball is arranged in the positioning ring groove.

[0013] In some embodiments, the side wall of the reinforcing ring is arranged with an expansion groove at the bottom end.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] Firstly, the utility model discloses a positioning ring arranged in the dust discharging groove, and the side wall of the positioning ring is inclined like the side wall of the dust discharging groove, and the bottom end of the dust discharging groove is communicated with the outside, so that the dust can slide down along the side wall of the positioning ring and be discharged, thereby avoiding the accumulation of dust between the protective frame and the outer rotor shell.

[0016] Secondly, the utility model discloses that the reinforcing ring is arranged between the positioning ring and the base to block the gap between the positioning ring and the base, thereby ensuring the sealing of the inner part of the outer rotor shell and further avoiding the entry of dust into the inner part of the outer rotor shell. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further explained in connection with the drawings and embodiments as follows:

[0018] Figure 1Is the overall structure of the utility model three-dimensional schematic diagram;

[0019] Figure 2 Is the utility model outer rotor shell internal structure schematic diagram;

[0020] Figure 3 Is the utility model base partial three-dimensional sample pattern;

[0021] Figure 4 Is the utility model positioning ring partial structure three-dimensional schematic diagram.

[0022] Mark explanation:

[0023] 1, base;2, protection frame;3, fixed frame;4, outer rotor shell;5, linkage shaft;6, dust removal groove;7, positioning ring;8, reinforcing ring;9, movable ball;10, positioning ring groove;11, expansion groove;12, stator winding;13, stator winding. Specific implementation

[0024] The utility model is described in detail below, and the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0025] The utility model provides a dustproof structure of direct current brushless outer rotor motor by improvement, and the technical scheme of the utility model is:

[0026] As Figures 1-4As shown, a dustproof structure of a direct-current brushless outer rotor motor, comprising a base 1, a linkage shaft 5 is rotatably installed on the top wall surface of the base 1, a positioning rod 13 is fixedly installed on the side wall of the linkage shaft 5, a stator winding 12 is fixedly installed on the outer side wall of the positioning rod 13, an outer rotor shell 4 is fixedly installed on the top end of the linkage shaft 5, a dustproof assembly is arranged on the top of the base 1, the dustproof assembly comprises a protective frame 2, a fixing frame 3, a dust removal groove 6 and a positioning ring 7, the protective frame 2 is arranged on the top of the base 1 and wraps the outer rotor shell 4, the fixing frame 3 is fixedly installed on the bottom wall surface of the base 1, and the top end of the fixing frame 3 is fixedly installed on the outer side wall of the protective frame 2, the dust removal groove 6 is opened on the side wall close to the base 1 of the protective frame 2, the inner side wall of the dust removal groove 6 is inclined, the positioning ring 7 is fixedly installed on the bottom wall surface of the outer rotor shell 4, and the bottom end of the positioning ring 7 is inside the dust removal groove 6, and the inner side wall of the positioning ring 7 is attached to the corresponding side wall of the base 1; by attaching the side wall of the positioning ring 7 to the inner side wall of the dust removal groove 6, the gap between the bottom end of the outer rotor shell 4 and the base 1 is filled, preventing dust from entering the inside of the outer rotor shell 4, by arranging the positioning ring 7 inside the dust removal groove 6, the side wall of the positioning ring 7 is inclined like the side wall of the dust removal groove 6, and the bottom end of the dust removal groove 6 is connected to the outside, dust will slide down along the side wall of the positioning ring 7 and be discharged, preventing dust from accumulating between the protective frame 2 and the outer rotor shell 4.

[0027] As Figures 1-4 shown, in an embodiment, in order to further improve the dustproof effect, a plurality of reinforcing rings 8 are equidistantly fixedly installed on the bottom wall surface of the positioning ring 7, and the inner side wall of the reinforcing ring 8 is attached to the side wall of the base 1; by blocking the gap between the positioning ring 7 and the base 1 with the reinforcing ring 8, the sealing of the inside of the outer rotor shell 4 is ensured, further preventing dust from entering the inside of the outer rotor shell 4; the side wall of the reinforcing ring 8 rotatably installs a movable ball 9, the outer side wall of the base 1 opens a positioning ring groove 10 aligned with the movable ball 9, and the movable ball 9 is inside the positioning ring groove 10; by reducing the friction between the reinforcing ring 8 and the base 1 through the movable ball 9, the resistance when the outer rotor shell 4 rotates is reduced, and the power loss when the base 1 and the outer rotor shell 4 rotate is reduced; the side wall bottom end of the reinforcing ring 8 opens an expansion groove 11; by reducing the contact area between the reinforcing ring 8 and the base 1 through the expansion groove 11, the resistance when the outer rotor shell 4 rotates is further reduced.

[0028] The specific working method is: through the abutment of the side wall of the positioning ring 7 and the inner side wall of the dust discharge groove 6, the gap between the bottom end of the outer rotor shell 4 and the base 1 is filled, so that the dust enters the inside of the outer rotor shell 4, through the setting of the positioning ring 7 in the inside of the dust discharge groove 6, the side wall of the positioning ring 7 and the side wall of the dust discharge groove 6 are inclined, the bottom end of the dust discharge groove 6 is communicated with the outside, the dust slides down along the side wall of the positioning ring 7 and is discharged, so that the dust is accumulated between the protective frame 2 and the outer rotor shell 4, through the reinforcement ring 8, the gap between the positioning ring 7 and the base 1 is blocked, the sealing property of the inside of the outer rotor shell 4 is ensured, the dust is further prevented from entering the inside of the outer rotor shell 4, through the movable ball 9, the friction between the reinforcement ring 8 and the base 1 is reduced, the resistance when the outer rotor shell 4 rotates is reduced, and the power loss when the base 1 and the outer rotor shell 4 rotate is reduced.

[0029] The technical means disclosed by the utility model scheme is not only limited to the technical means disclosed by the above technical means, but also includes the technical scheme composed by the above technical features and equivalent replacement. The unfinished matters of the utility model belong to the common knowledge of the person skilled in the art.

Claims

1. A dustproof structure for a DC brushless external rotor motor, comprising a base (1), a linkage shaft (5) rotatably mounted on the top wall of the base (1), a positioning rod (13) fixedly mounted on the side wall of the linkage shaft (5), a stator winding (12) fixedly mounted on the outer side wall of the positioning rod (13), and an outer rotor housing (4) fixedly mounted on the top end of the linkage shaft (5), characterized in that: The top of the base (1) is provided with a dustproof assembly, which comprises; A protective frame (2) and a fixing frame (3), the protective frame (2) is arranged on the top of the base (1) and wraps the outer rotor shell (4) inside, the fixing frame (3) is fixedly installed on the bottom wall of the base (1), and the top end of the fixing frame (3) is fixedly installed on the outer side wall of the protective frame (2); A dust removal groove (6) is arranged on the side wall close to the protective frame (2) and the base (1); A positioning ring (7) is fixedly installed on the bottom wall of the outer rotor shell (4).

2. The dustproof structure of a direct-current brushless outer rotor motor according to claim 1, characterized in that: The inner side wall of the dust removal groove (6) is inclined, the bottom end of the positioning ring (7) is located in the dust removal groove (6), and the inner side wall of the positioning ring (7) is attached to the corresponding side wall of the base (1).

3. The dustproof structure of a direct-current brushless outer rotor motor according to claim 1, characterized in that: A plurality of reinforcing rings (8) are fixedly installed on the bottom wall of the positioning ring (7) at equal intervals, and the inner side wall of the reinforcing ring (8) is attached to the side wall of the base (1).

4. The dustproof structure of a direct-current brushless outer rotor motor according to claim 3, characterized in that: A movable ball (9) is rotatably installed on the side wall of the reinforcing ring (8), and a positioning ring groove (10) aligned with the movable ball (9) is formed in the outer side wall of the base (1), and the movable ball (9) is located in the positioning ring groove (10).

5. The dustproof structure of a direct-current brushless outer rotor motor according to claim 3, characterized in that: An expansion groove (11) is formed in the bottom end of the side wall of the reinforcing ring (8).

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