Fan motor with built-in rotation stopping groove structure

Abstract

The utility model relates to a fan motor with a built-in rotation stopping groove structure, which comprises a motor shell, the motor shell is composed of an annular middle shell, a rear end shell and a front end shell, a plurality of convex strip-shaped lug seats are formed on the outer wall of the middle shell, and a plurality of convex strip-shaped lug seats are formed on the outer wall of the front end shell. A plurality of rear support lugs and front support lugs which are opposite to the lug seats are formed on the outer walls of the rear end shell and the front end shell respectively, a plurality of screws are inserted into the rear support lugs and the front support lugs respectively, and the screws are screwed to the two ends of the lug seats respectively; a rotor and a stator are respectively inserted in the motor shell, the stator comprises an iron core, a strip-shaped inner rotation stopping groove is formed in the outer wall of the iron core on the stator, a plurality of strip-shaped outer rotation stopping grooves are formed in the inner wall of the middle shell, and a rotation stopping clamping strip is arranged between the middle shell and the stator. The rotation stopping clamping strips are respectively inserted into the inner rotation stopping grooves of the stator and the outer rotation stopping grooves of the middle shell; according to the motor, the rotation stopping grooves are formed in the stator and the motor shell to be matched with the rotation stopping clamping strips to limit radial rotation of the stator, and meanwhile mechanical sealing can be effectively achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of motor, more specifically to a fan motor with built-in rotation-stopping groove structure. BACKGROUND

[0002] Axial flow fan, use very widely, it is with the airflow of the same direction of the shaft of the fan blade, the structure of axial flow fan generally includes the air guide cylinder, motor mounting support, motor and impeller, wherein the structure of motor generally includes motor casing, the stator is inserted in the motor casing, the middle part of the stator is pivotally connected with the rotor, and the rotating shaft of the motor is arranged on the rotor, the motor in the current axial flow fan is generally circular, that is, the motor casing and the stator are circular, the stator is directly inserted and clamped in the motor casing, and the friction between the outer wall of the stator core and the inner wall of the motor casing is used for positioning, then the coil winding on the stator is energized to generate a magnetic field, and the rotor is driven to rotate based on the magnetic field, but when the motor works, the stator will generate gyroscopic moment, and the gyroscopic moment is easy to cause the radial rotation of the stator in the motor casing, so it is necessary to design a structure for limiting the radial rotation of the stator. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a fan motor with built-in rotation-stopping groove structure, which limits the radial rotation of the stator by opening the rotation-stopping groove on the stator and the motor casing and cooperating with the rotation-stopping clamping strip, and sets the ceramic sealing element at both ends of the stator to limit the axial movement of the stator and the rotation-stopping clamping strip, and can effectively realize mechanical sealing.

[0004] A fan motor with built-in rotation-stopping groove structure, comprising a motor housing, the motor housing is composed of a circular intermediate shell, a rear end shell and a front end shell, a plurality of lug seats in the form of protrusions are formed on the outer wall of the intermediate shell, a plurality of rear lug ears and front lug ears respectively opposite to the lug seats are formed on the outer walls of the rear end shell and the front end shell, a plurality of screws are respectively inserted into the rear lug ears and the front lug ears, and the screws are respectively screwed into the two ends of the lug seats; a rotor and a stator are respectively inserted into the motor housing, the stator comprises a core, a coil winding is arranged on the core, a strip-shaped inner rotation-stopping groove is formed on the outer wall of the core on the stator, a plurality of strip-shaped outer rotation-stopping grooves are formed on the inner wall of the intermediate shell, and a rotation-stopping clamping strip is arranged between the intermediate shell and the stator and respectively inserted into the inner rotation-stopping groove of the stator and the outer rotation-stopping groove of the intermediate shell.

[0005] The two end faces of the core on the stator respectively abut against ceramic sealing elements, the ceramic sealing elements comprise a circular compression ring, the outer ring of the compression ring abuts against the inner wall of the intermediate shell, and the inner ring is provided with a sealing block ring with a conical outer wall; conical rear sealing surfaces and front sealing surfaces are respectively formed on the inner walls of the rear end shell and the front end shell, and the sealing block rings on the ceramic sealing elements respectively abut against the rear sealing surface of the rear end shell and the front sealing surface of the front end shell.

[0006] The middle part of the inner bottom surface of the rear end shell is shaped as a circular support, and the middle part of the front end shell is shaped as a cylindrical hub, and the hub and the support are respectively inserted and fixed with bearings;

[0007] The rotor is provided with a rotating shaft, one end of which is connected to the rear end shell through a bearing and the other end of which is connected to the front end shell through a bearing and extends out of the front end shell.

[0008] Preferably, the thickness of the stator upper core is equal to the length of the rotation-stopping strip, and the two ends of the rotation-stopping strip abut against the pressing rings of the ceramic sealing element.

[0009] Preferably, the coil winding of the stator extends out of the two end surfaces of the core and is inserted into the sealing blocking ring of the ceramic sealing element.

[0010] Preferably, the number of the outer rotation-stopping grooves on the middle shell is equal to the number of the ear seats, the outer rotation-stopping grooves are located on the inner side of the ear seats, and the outer rotation-stopping grooves and the ear seats are uniformly distributed in a ring shape around the central axis of the middle shell.

[0011] Preferably, the outer wall of the middle shell is shaped with a plurality of heat dissipation plates, the middle shell between the heat dissipation plates is shaped with a buckle groove, and the buckle groove is shaped with a T-shaped connecting groove.

[0012] The motor has the advantages that:

[0013] The motor limits the radial rotation of the stator by the rotation-stopping grooves on the stator and the motor shell cooperating with the rotation-stopping strip, limits the axial movement of the stator and the rotation-stopping strip by the ceramic sealing element arranged at the two ends of the stator, and effectively realizes mechanical sealing. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a three-dimensional structure schematic diagram of the utility model;

[0015] Fig. 2 It is an axial sectional structure schematic diagram of the utility model;

[0016] Fig. 3 It is a radial sectional structure schematic diagram of the utility model;

[0017] Fig. 4 It is Fig. 3 It is a local enlarged structure schematic diagram of the middle A.

[0018] In the figure: 1, the middle shell; 11, ear seat; 12, outer rotation stop groove; 13, heat dissipation plate; 14, buckle groove; 2, rear end shell; 21, rear support ear; 22, rear sealing surface; 23, support; 3, front end shell; 31, front support ear; 32, front sealing surface; 33, hub; 4, stator; 5, rotor; 6, screw; 7, rotation stop bar; 8, ceramic seal; 81, compression ring; 82, sealing baffle; 9, bearing. DETAILED DESCRIPTION

[0019] Embodiment: see Figs. 1 to 4 As shown in the figure, a fan motor with a rotation stop groove structure comprises a motor shell, which is composed of a circular middle shell 1, a rear end shell 2 and a front end shell 3. The outer wall of the middle shell 1 is formed with a plurality of protrusion-shaped ear seats 11. The outer walls of the rear end shell 2 and the front end shell 3 are respectively formed with a plurality of rear support ears 21 and front support ears 31 opposite to the ear seats 11. A plurality of screws 6 are respectively inserted into the rear support ears 21 and the front support ears 31. The screws 6 are respectively screwed into both ends of the ear seats 11. A rotor 5 and a stator 4 are respectively inserted into the motor shell. The stator 4 comprises an iron core, which is provided with a coil winding 42. The outer wall of the iron core of the stator 4 is formed with a strip-shaped inner rotation stop groove 41. The inner wall of the middle shell 1 is formed with a plurality of strip-shaped outer rotation stop grooves 12. A rotation stop bar 7 is arranged between the middle shell 1 and the stator 4 and is respectively inserted into the inner rotation stop groove 41 of the stator 4 and the outer rotation stop groove 12 of the middle shell 1.

[0020] Both end faces of the iron core of the stator 4 are respectively abutted against a ceramic seal 8. The ceramic seal 8 comprises a circular compression ring 81. The outer ring of the compression ring 81 is abutted against the inner wall of the middle shell 1, and the inner ring is formed with a sealing baffle 82 with a conical outer wall. The inner walls of the rear end shell 2 and the front end shell 3 are respectively formed with conical rear sealing surfaces 22 and front sealing surfaces 32. The sealing baffles 82 of the ceramic seal 8 are respectively abutted against the rear sealing surfaces 22 of the rear end shell 2 and the front sealing surfaces 32 of the front end shell 3.

[0021] The middle part of the inner bottom face of the rear end shell 2 is formed with a circular support 23. One side of the support 23 is provided with an opening, and the other side is closed by the rear end shell 2. The middle part of the front end shell 3 is formed with a cylindrical hub 33. Both ends of the hub 33 are provided with openings. The hub 33 and the support 23 are respectively inserted and fixed with bearings 9.

[0022] The center of the rotor 5 is provided with a rotating shaft. One end of the rotating shaft is connected to the rear end shell 2 through the bearing 9, and the other end is connected to the front end shell 3 through the bearing 9 and extends out of the front end shell 3.

[0023] The thickness of the iron core of the stator 4 is equal to the length of the rotation stop bar 7. Both ends of the rotation stop bar 7 are respectively abutted against the compression ring 81 of the ceramic seal 8. The compression ring 81 can limit the axial movement of the rotation stop bar 7.

[0024] The coil winding 42 on the stator 4 extends out of the two end faces of the core and is inserted into the sealing baffle 82 of the ceramic sealing member 8, the coil winding 42 on the two ends of the core of the stator 4 is inserted into the rear end shell 2 and the front end shell 3, the sealing baffle 82 can separate the coil winding 42 from the rear end shell 2 and the front end shell 3, thereby avoiding the problem that the coil winding 42 deforms and relies on the rear end shell 2 or the front end shell 3 to cause short circuit.

[0025] The number of the outer rotation-stopping grooves 12 on the middle shell 1 is equal to the number of the lug seats 11, the outer rotation-stopping grooves 12 are located on the inner side of the lug seats 11, and the advantage is that the strength of the middle shell 1 is not affected, if the outer side of the outer rotation-stopping grooves 12 is not provided with the lug seats 11, the wall thickness of the middle shell 1 is weakened, and the strength of the middle shell 1 is affected, the outer rotation-stopping grooves 12 and the lug seats 11 are uniformly distributed in a ring shape around the central axis of the middle shell 1.

[0026] A plurality of heat dissipation plates 13 are formed on the outer wall of the middle shell 1, the heat dissipation plates 13 are used for heat dissipation of the motor, and a buckle groove 14 is formed on the middle shell 1 between the heat dissipation plates 13, a T-shaped connecting groove is formed in the buckle groove 14, a T-shaped bolt can be inserted into the T-shaped connecting groove, and the T-shaped bolt is used for mounting and connecting a motor mounting bracket.

[0027] Working principle: the structure is a fan motor with an inner rotation-stopping groove structure, the main technical point is that the inner rotation-stopping groove 41 is arranged on the core of the stator 4, the corresponding outer rotation-stopping groove 12 is arranged on the middle shell 1, and the rotation-stopping clamping strip 7 is arranged to limit the relative rotation between the stator 4 and the middle shell 1, so that the stator 4 can overcome the problem of radial rotation caused by the gyroscopic moment.

[0028] The second technical point is that the ceramic sealing member 8 is additionally arranged at the two ends of the stator 4, the ceramic sealing member 8 can be used for end face sealing between the middle shell 1, the rear end shell 2 and the front end shell 3, and can be used for positioning the axial positions of the stator 4 and the rotation-stopping clamping strip 7, and the reason why the ceramic sealing member 8 is used instead of a rubber sealing member is that a large amount of heat is generated during the operation of the motor, and the large amount of heat can accelerate the aging of the rubber sealing member, and the aging leads to failure of the rubber sealing member.

[0029] The embodiments are used to illustratively explain the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, and therefore the protection scope of the utility model should be as listed in the claims of the utility model.

Claims

1. A fan motor with a built-in anti-rotation slot structure, comprising a motor housing composed of a circular intermediate housing (1), a rear end housing (2) and a front end housing (3), the outer wall of the intermediate housing (1) is formed with a plurality of lug-shaped ear seats (11), the outer walls of the rear end housing (2) and the front end housing (3) are respectively formed with a plurality of rear and front supporting ears (21) and (31) opposite to the ear seats (11), the rear and front supporting ears (21) and (31) are respectively inserted with a plurality of screws (6), and the screws (6) are respectively screwed at both ends of the ear seats (11); a rotor (5) and a stator (4) are respectively inserted in the motor housing, the stator (4) comprises an iron core provided with a coil winding (42), characterized in that: The outer wall of the core of the stator (4) is formed with a strip-shaped inner rotation-stopping groove (41), the inner wall of the middle casing (1) is formed with a plurality of strip-shaped outer rotation-stopping grooves (12), and a rotation-stopping clamping strip (7) is arranged between the middle casing (1) and the stator (4), and the rotation-stopping clamping strip (7) is respectively inserted into the inner rotation-stopping groove (41) of the stator (4) and the outer rotation-stopping groove (12) of the middle casing (1); The two end faces of the core of the stator (4) are respectively abutted by a ceramic sealing element (8), the ceramic sealing element (8) comprises a circular ring-shaped pressing ring (81), the outer ring of the pressing ring (81) is abutted on the inner wall of the middle casing (1), and the inner ring is formed with a sealing baffle (82) with a conical outer wall; the inner wall of the rear end casing (2) and the inner wall of the front end casing (3) are respectively formed with a conical rear sealing surface (22) and a conical front sealing surface (32), and the sealing baffle (82) of the ceramic sealing element (8) is respectively abutted on the rear sealing surface (22) of the rear end casing (2) and the front sealing surface (32) of the front end casing (3).

2. The motor for fan with built-in anti-rotation slot structure according to claim 1, characterized in that: The middle part of the inner bottom surface of the rear end casing (2) is formed with a circular ring-shaped support (23), and the middle part of the front end casing (3) is formed with a cylindrical hub (33), and the hub (33) and the support (23) are respectively inserted and fixed with a bearing (9); The center of the rotor (5) is provided with a rotating shaft, one end of the rotating shaft is connected to the rear end casing (2) through the bearing (9), and the other end is connected to the front end casing (3) through the bearing (9) and extends out of the front end casing (3).

3. The motor for fan with built-in anti-rotation slot structure according to claim 1, characterized in that: The thickness of the core of the stator (4) is equal to the length of the rotation-stopping clamping strip (7), and the two ends of the rotation-stopping clamping strip (7) are respectively abutted on the pressing ring (81) of the ceramic sealing element (8).

4. The motor for fan with built-in anti-rotation slot structure according to claim 1, characterized in that: The coil winding (42) of the stator (4) is respectively inserted into the sealing baffle (82) of the ceramic sealing element (8) and extends out of the two end faces of the core.

5. The motor for fan with built-in anti-rotation slot structure according to claim 1, characterized in that: The number of the outer rotation-stopping grooves (12) on the middle casing (1) is equal to the number of the ear seats (11), the outer rotation-stopping grooves (12) are located on the inner side of the ear seats (11), and the outer rotation-stopping grooves (12) and the ear seats (11) are uniformly distributed in a ring shape around the central axis of the middle casing (1).

6. The motor for fan with built-in anti-rotation slot structure according to claim 1, characterized in that: The outer wall of the middle casing (1) is formed with a plurality of heat dissipation plates (13), the middle casing (1) between the heat dissipation plates (13) is formed with a clamping groove (14), and the clamping groove (14) is formed with a T-shaped connecting groove.

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