Motor for high-speed fan

Abstract

The utility model relates to the technical field of motors, in particular to a motor for a high-speed fan, which comprises a casing and a rear cover. A driving cavity is formed between the shell and the rear cover; a stator is arranged in the driving cavity; a rotating shaft is rotationally arranged in the stator; a coil is wound on the stator; the rotating shaft is sleeved with magnetic steel matched with the coil. The shell and the rear cover are provided with a first bearing and a second bearing; the outer ring of the first bearing is arranged in the shell; the outer ring of the second bearing is arranged in the rear cover; one end of the rotating shaft is arranged in the first bearing; the other end of the rotating shaft is arranged in the second bearing; and the shell is in interference fit with the rear cover. According to the utility model, the first bearing and the second bearing are respectively arranged at the two ends of the bearing, so that the rotating shaft can be effectively supported, and the motor for the high-speed fan is stable and reliable in operation; in addition, the casing is in interference fit with the rear cover, so that the concentricity of the bearing between the casing and the rear cover can be ensured, the noise can be effectively reduced, and the performance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor for a high-speed fan. Background Art

[0002] Most high-speed fan motors currently on the market use a cantilever beam structure, characterized by bearings supporting the stator and rotor at the same end. However, this design presents structural stability issues, potentially leading to increased vibration during operation, which in turn affects the motor's overall performance and service life.

[0003] Furthermore, in existing high-speed blower motors, the rear cover is typically secured to the outer surface of the stator core. However, the stator core may produce burrs during the manufacturing process, and its geometric accuracy, such as roundness and straightness, often struggles to achieve ideal results. Consequently, during actual operation of the assembled motor, the rotor may become eccentric within the air duct, causing additional vibration and noise, particularly high-frequency noise, which severely impacts equipment efficiency and user experience. Utility Model Content

[0004] The purpose of the utility model is to provide a motor for a high-speed fan in view of the above-mentioned deficiencies in the prior art.

[0005] The purpose of the utility model is achieved through the following technical solutions: A motor for a high-speed fan, comprising a housing and a rear cover; a drive cavity is formed between the housing and the rear cover; a stator is provided in the drive cavity; a rotating shaft is provided in the stator for rotation; a coil is wound around the stator; a magnet is provided on the outer shell of the rotating shaft for cooperating with the coil;

[0006] A first bearing and a second bearing are respectively provided at both ends of the housing; the outer ring of the first bearing is provided in the housing; the outer ring of the second bearing is provided in the rear cover; one end of the rotating shaft is provided in the first bearing; the other end of the rotating shaft is provided in the second bearing;

[0007] The housing and the rear cover are interference fit.

[0008] The utility model is further configured such that the stator outer shell is provided with an insulating frame.

[0009] The present invention is further configured such that the casing includes an inner casing and an outer casing arranged outside the inner casing; the inner casing and the back cover are interference fit; the drive cavity is formed between the inner casing and the back cover; and an air cavity is formed between the outer casing and the inner casing.

[0010] The utility model is further configured such that one end of the rotating shaft protrudes out of the inner casing and is connected to a blade; the blade is rotatably arranged in the air cavity.

[0011] The present invention is further configured such that a flow guide frame is provided between the inner casing and the outer casing.

[0012] The utility model is further configured such that a circuit board is provided at one end of the back cover away from the housing; the coil is electrically connected to the circuit board; the insulating frame is provided with a connecting rod; the connecting rod protrudes from the back cover and is connected to the circuit board.

[0013] The present invention is further configured such that a first connecting plate is provided at one end of the rear cover close to the housing; and a second connecting plate is provided at one end of the inner housing close to the rear cover in interference fit with the first connecting plate.

[0014] The present invention is further configured such that the second connecting plate is provided with a connecting inclined surface.

[0015] The present invention is further configured such that a first sleeve is sleeved on the rotating shaft between one end of the magnetic steel and the first bearing; one end of the first sleeve abuts against one end of the magnetic steel; and a spring is provided between the other end of the first sleeve and the first bearing.

[0016] The present invention is further configured such that a second sleeve is sleeved on the rotating shaft between the other end of the magnetic steel and the second bearing; one end of the second sleeve abuts against the other end of the magnetic steel; and the other end of the second sleeve abuts against the second bearing.

[0017] The beneficial effects of the present invention are as follows: the present invention can effectively support the rotating shaft by arranging the first bearing and the second bearing at both ends of the bearing respectively, so that the operation of the high-speed fan motor is stable and reliable; in addition, by interference fitting the casing and the rear cover, the concentricity of the bearing in the casing and the rear cover can be ensured, which can effectively reduce noise and improve performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without making any creative effort.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0021] Figure 3 It is a cross-sectional view of the present utility model;

[0022] Figure 4 yes Figure 3 A partial enlarged view of part A in the middle;

[0023] Among them: 11. Outer casing; 12. Inner casing; 21. Drive chamber; 22. Wind chamber; 23. Back cover; 3. Stator; 31. Insulation frame; 32. Connecting rod; 4. Rotating shaft; 41. Magnet; 51. First bearing; 52. Second bearing; 61. Blade; 62. Guide frame; 7. Circuit board; 81. First connecting plate; 82. Second connecting plate; 83. Connecting slope; 91. First sleeve; 92. Second sleeve; 93. Spring. DETAILED DESCRIPTION

[0024] The present invention will be further described with reference to the following embodiments.

[0025] Depend on Figures 1 to 4 As can be seen, the high-speed blower motor described in this embodiment includes a housing and a rear cover 23; a drive chamber 21 is formed between the housing and the rear cover 23; a stator 3 is disposed in the drive chamber 21; a rotating shaft 4 is rotatably disposed in the stator 3; a coil is wound around the stator 3; a magnet 41 is disposed on the outer surface of the rotating shaft 4 to cooperate with the coil; the coil is not shown in the figure.

[0026] A first bearing 51 and a second bearing 52 are respectively provided at both ends of the housing; the outer ring of the first bearing 51 is provided in the housing; the outer ring of the second bearing 52 is provided in the rear cover 23; one end of the rotating shaft 4 is provided in the first bearing 51; the other end of the rotating shaft 4 is provided in the second bearing 52;

[0027] The housing and the rear cover 23 are interference fit.

[0028] Specifically, the high-speed fan motor described in this embodiment can effectively support the rotating shaft 4 by arranging the first bearing 51 and the second bearing 52 at both ends of the bearing, so that the high-speed fan motor can operate stably and reliably; in addition, by interference fitting the casing and the rear cover 23, the concentricity of the bearing in the casing and the rear cover 23 can be ensured, which can effectively reduce noise and improve performance.

[0029] In the motor for a high-speed blower described in this embodiment, an insulating frame 31 is provided on the outer cover of the stator 3. The above arrangement can ensure the insulation performance of the stator 3.

[0030] The motor for a high-speed fan described in this embodiment comprises an inner housing 12 and an outer housing 11 disposed outside the inner housing 12. The inner housing 12 is interference-fitted with a rear cover 23. The drive chamber 21 is formed between the inner housing 12 and the rear cover 23, and the air chamber 22 is formed between the outer housing 11 and the inner housing 12. This arrangement ensures a stable and reliable structure among the fan, the rotating shaft 4, and the stator 3.

[0031] In the high-speed blower motor described in this embodiment, one end of the rotating shaft 4 protrudes from the inner housing 12 and is connected to a blade 61; the blade 61 is rotatably disposed in the wind cavity 22. Through this arrangement, the rotating shaft 4 can drive the blade 61 to rotate, thereby forming a flow of wind in the wind cavity 22.

[0032] In this embodiment of a high-speed fan motor, a deflector 62 is provided between the inner housing 12 and the outer housing 11. This arrangement effectively enhances wind flow and increases airflow. Furthermore, the inner housing 12, the outer housing 11, and the deflector 62 are integrally formed, facilitating manufacturing.

[0033] In this embodiment of a high-speed blower motor, a circuit board 7 is provided at the end of the rear cover 23 away from the housing; the coil is electrically connected to the circuit board 7; and a connecting rod 32 is provided on the insulating frame 31. The connecting rod 32 protrudes from the rear cover 23 and connects to the circuit board 7. This arrangement ensures a stable and reliable overall structure.

[0034] In the high-speed blower motor described in this embodiment, a first connecting plate 81 is provided on the end of the rear cover 23 near the housing; a second connecting plate 82 is provided on the end of the inner housing 12 near the rear cover 23, which is an interference fit with the first connecting plate 81. In the high-speed blower motor described in this embodiment, the second connecting plate 82 is provided with a connecting bevel 83.

[0035] Specifically, since the outer and inner surfaces corresponding to the rear cover 23 and the inner housing 12 can be precision-machined, the dimensional accuracy and positional accuracy can ensure the accuracy of the first connecting plate 81 and the second connecting plate 82. After the first connecting plate 81 and the second connecting plate 82 are interference fit through the connecting bevel 83, the concentricity of the bearing in the housing and the rear cover 23 can be ensured, which can effectively reduce noise and improve performance.

[0036] In the high-speed blower motor described in this embodiment, a first sleeve 91 is sleeved between one end of the magnet 41 and the first bearing 51 on the rotating shaft 4; one end of the first sleeve 91 abuts against one end of the magnet 41; a spring 93 is provided between the other end of the first sleeve 91 and the first bearing 51. In the high-speed blower motor described in this embodiment, a second sleeve 92 is sleeved between the other end of the magnet 41 and the second bearing 52 on the rotating shaft 4; one end of the second sleeve 92 abuts against the other end of the magnet 41; the other end of the second sleeve 92 abuts against the second bearing 52.

[0037] Specifically, by providing a spring 93, this embodiment can eliminate the installation gap between the magnet 41, the first sleeve 91, the second sleeve 92, the first bearing 51 and the second bearing 52, thereby achieving a pre-tightening effect on the first bearing 51 and the second bearing 52, improving the structural stability of the first bearing 51 and the second bearing 52, and increasing their service life.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A motor for a high-speed fan, characterized in that: The invention comprises a housing and a rear cover (23); a driving cavity (21) is formed between the housing and the rear cover (23); a stator (3) is provided in the driving cavity (21); a rotating shaft (4) is provided in the stator (3) for rotation; a coil is wound around the stator (3); a magnetic steel (41) cooperating with the coil is provided on the outer shell of the rotating shaft (4); A first bearing (51) and a second bearing (52) are respectively provided at both ends of the housing; the outer ring of the first bearing (51) is provided in the housing; the outer ring of the second bearing (52) is provided in the rear cover (23); one end of the rotating shaft (4) is provided in the first bearing (51); the other end of the rotating shaft (4) is provided in the second bearing (52); The housing and the rear cover (23) are interference fit.

2. A high-speed fan motor according to claim 1, characterized in that: The stator (3) is provided with an insulating frame (31) on its outer shell.

3. The motor for a high-speed blower according to claim 1, characterized in that: The housing comprises an inner housing (12) and an outer housing (11) arranged outside the inner housing (12); the inner housing (12) and the rear cover (23) are interference-fitted; the drive cavity (21) is formed between the inner housing (12) and the rear cover (23); and an air cavity (22) is formed between the outer housing (11) and the inner housing (12).

4. A high-speed blower motor according to claim 3, characterized in that: One end of the rotating shaft (4) protrudes out of the inner casing (12) and is connected to a blade (61); the blade (61) is rotatably arranged in the air cavity (22).

5. The motor for a high-speed blower according to claim 3, characterized in that: A flow guide frame (62) is provided between the inner casing (12) and the outer casing (11).

6. The motor for a high-speed blower according to claim 2, characterized in that: A circuit board (7) is provided at one end of the rear cover (23) away from the housing; the coil is electrically connected to the circuit board (7); the insulating frame (31) is provided with a connecting rod (32); the connecting rod (32) protrudes out of the rear cover (23) and is connected to the circuit board (7).

7. The motor for a high-speed blower according to claim 3, characterized in that: A first connecting plate (81) is provided at one end of the rear cover (23) close to the inner casing (12); and a second connecting plate (82) is provided at one end of the inner casing (12) close to the rear cover (23) and is interference-fitted with the first connecting plate (81).

8. The motor for a high-speed blower according to claim 7, characterized in that: The second connecting plate (82) is provided with a connecting inclined surface (83).

9. The motor for a high-speed blower according to claim 1, characterized in that: The rotating shaft (4) is provided with a first sleeve (91) between one end of the magnetic steel (41) and the first bearing (51); one end of the first sleeve (91) abuts against one end of the magnetic steel (41); and a spring (93) is provided between the other end of the first sleeve (91) and the first bearing (51).

10. The motor for a high-speed blower according to claim 9, characterized in that: The rotating shaft (4) is provided with a second sleeve (92) between the other end of the magnetic steel (41) and the second bearing (52); one end of the second sleeve (92) abuts against the other end of the magnetic steel (41); and the other end of the second sleeve (92) abuts against the second bearing (52).

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