Motor for cooling fan

Abstract

The utility model provides a motor for a cooling fan, which belongs to the technical field of motors and comprises a shaft center rotationally connected in a copper pipe through a bearing. The stator sleeves the peripheral side of the copper pipe; the magnetic device is arranged on the peripheral side of the stator; the motor shell is arranged on the peripheral side of the magnetic device and connected with the copper pipe through a motor base, and the copper pipe is hollow and used for containing and fixing the axis, containing the bearing and fixing other central parts. According to the utility model, the inner-ring magnetic steel and the outer-ring magnetic steel in the magnetic device cooperate with each other to output magnetic force together, thereby reducing the internal air gap of the motor, further improving the air gap flux density of the motor, and optimizing the efficiency of the motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a motor for cooling fan. BACKGROUND

[0002] As an indispensable component in electronic equipment, the performance of the cooling fan is directly related to the heat dissipation effect and running stability of the equipment. In the core component of the cooling fan, the motor, the magnetic steel plays a crucial role. The existing motor for cooling fan usually adopts ring-shaped single magnetic steel to improve the strength and stability of the magnetic field, thereby enhancing the electromagnetic performance of the motor. The ring-shaped single magnetic steel is widely used due to its simple structure and relatively low manufacturing cost.

[0003] Although the ring-shaped single magnetic steel is widely used in the motor for cooling fan, its inherent limitations have gradually emerged. First, the motor using ring-shaped single magnetic steel has deficiencies in air gap magnetic density, which directly affects the output torque and speed of the motor. The magnetic field distribution characteristics of the ring-shaped single magnetic steel make the magnetic density at the air gap of the motor relatively low, which limits the speed increase and torque output capability of the motor. Second, due to the limitation of magnetic field strength and stability, the motor needs to consume more electric energy to maintain stable output during operation, which not only increases the operating cost of the equipment, but also may cause certain burden to the power grid. In addition, the ring-shaped single magnetic steel motor also has the problem of large interference magnetic density.

[0004] In summary, although the ring-shaped single magnetic steel has certain application value in the motor for cooling fan, its low air gap magnetic density, slow speed increase, high power consumption, and large interference magnetic density limit its application in high performance demand occasions INVENTION CONTENTS

[0005] Therefore, the utility model provides a motor for cooling fan to solve the problem of low air gap magnetic density, slow speed increase, high power consumption, and large interference magnetic density of the motor using ring-shaped single magnetic steel, which cannot meet the high performance demand.

[0006] Therefore, the utility model provides a motor for cooling fan, comprising:

[0007] A shaft is placed in the copper pipe through bearings and connected with the motor shell, used to support the motor shell and support the rotation of the cooling fan blades;

[0008] A stator includes stator laminations and an insulation frame, which is sleeved on the side of the copper pipe, used for winding coil embedding, and constitutes the motor armature;

[0009] A magnetic force device is arranged on the side of the stator, used to increase the magnetic force on the side of the stator;

[0010] Motor shell, disposed on the side of the magnetic device, connected with the copper pipe and the heat dissipation fan blade through the motor base, used for preventing magnetic device from leaking magnetic flux and protecting the magnetic device;

[0011] Copper pipe, hollow inside, used for placing and fixing the shaft, accommodating the bearing and fixing other central components.

[0012] Further, the magnetic device comprises:

[0013] Inner ring magnetic steel, disposed on the side of the stator, used for outputting magnetic force;

[0014] Outer ring magnetic steel, disposed on the side of the inner ring magnetic steel, used for outputting magnetic force together with the inner ring magnetic steel;

[0015] Magnetic steel fixing ring, with a protruding structure in the middle, used for positioning and fixing the inner ring magnetic steel.

[0016] Further, the inner ring magnetic steel and the outer ring magnetic steel have an air gap between them.

[0017] Further, the inner ring magnetic steel and the outer ring magnetic steel have the same thickness.

[0018] Further, the total thickness of the inner ring magnetic steel and the outer ring magnetic steel plus the thickness of the air gap is equal to the thickness of a single magnetic steel used in the motor.

[0019] Further, the copper pipe is connected with a printed circuit board.

[0020] Further, the other central components comprise:

[0021] Friction plate, disposed on the inner bottom side of the copper pipe, used for reducing the wear of the ball head of the shaft;

[0022] Snap ring, disposed inside the copper pipe, used for locking the shaft to prevent the motor shell or the heat dissipation fan blade from falling off;

[0023] Bearing, disposed inside the copper pipe, located on the upper side of the snap ring, used for supporting the motor shell and reducing friction;

[0024] Positioning ring, disposed on the upper side of the bearing, used for fixing the bearing.

[0025] Further, it also comprises a winding coil wound on the stator.

[0026] Compared with the prior art, the utility model has the following advantages:

[0027] 1. The motor for the heat dissipation fan provided by the utility model reduces the air gap in the motor by the cooperation of the inner ring magnetic steel and the outer ring magnetic steel in the magnetic device, thereby improving the air gap magnetic density of the motor and optimizing the efficiency of the motor.

[0028] 2. The utility model discloses a single magnetic steel is increased a circle magnetic steel on the basis, forms the cooperation of inner ring magnetic steel and outer ring magnetic steel and exports magnetic force together, furtherly change the total thickness of the original single magnetic steel into two same thicknesses of inner ring magnetic steel and outer ring magnetic steel, and the air gap is left between inner ring magnetic steel and outer ring magnetic steel to solve the problem of the air gap magnetic density of the motor of the heat dissipation fan in the prior art is not high, the rotation speed is slow to promote, the power consumption is higher, the interference magnetic density is big, and the high performance demand can not be satisfied. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0030] Figure 1 A detail structure schematic diagram of the motor of the heat dissipation fan is provided for the embodiment of the utility model.

[0031] Figure 2 An internal section view schematic diagram of the motor of the heat dissipation fan is provided for the embodiment of the utility model.

[0032] Figure 3 A exploded view of the motor of the heat dissipation fan is provided for the embodiment of the utility model.

[0033] Figure 4 A product assembly drawing of the motor of the heat dissipation fan and the heat dissipation fan is provided for the embodiment of the utility model.

[0034] Mark explanation:

[0035] 1. Shaft center; 2. Bearing; 3. Copper pipe; 4. Stator; 5. Motor shell; 6. Inner ring magnetic steel; 7. Outer ring magnetic steel; 8. Printed circuit; 9. Motor base; 10. Friction plate; 11. Clasping ring; 12. Positioning ring; 13. Magnetic steel fixing ring; 14. Winding coil; 15. Heat dissipation fan base; 16. Heat dissipation fan blade. EMBODIMENT

[0036] The technical scheme of the utility model will be described below in conjunction with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creating labor belong to the scope of protection of the utility model.

[0037] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] Embodiment 1

[0039] Figure 1 A structural schematic view of the motor for a cooling fan provided in the present embodiment, Figure 2 A structural schematic view of the motor for a cooling fan provided in the present embodiment, Figure 1 A structural schematic view of the motor for a cooling fan provided in the present embodiment.

[0040] Referring to Figure 1 and Figure 2 , the motor for a cooling fan comprises:

[0041] The shaft 1 is rotatably arranged in the copper pipe 3 through the bearing 2, is connected with the motor shell 5 through process welding, and is used for supporting the motor shell 5 and supporting the rotation of the cooling fan blade 16;

[0042] The stator 4 comprises a stator lamination and an insulation frame, which are arranged on the periphery of the copper pipe (3) and are jointly used for embedding the winding coil (14) to form a motor armature;

[0043] The magnetic force device is arranged on the periphery of the stator (4) and is used for increasing the magnetic force on the periphery of the stator (4);

[0044] The motor shell (5) is arranged on the periphery of the magnetic force device, is connected with the copper pipe (3) through the motor base (9), and is used for preventing the magnetic force device from leaking magnetic flux and protecting the magnetic force device;

[0045] The copper pipe (3) is hollow inside, is used for placing and fixing the shaft (1), accommodating the bearing (2) and fixing other central components.

[0046] The utility model discloses a magnetic force device increases the magnetic force on the periphery of the stator 4 to improve the motor air gap magnetic density, and further improves the motor performance.

[0047] In the present embodiment, the magnetic force device comprises:

[0048] The inner ring magnetic steel 6 is arranged on the periphery of the stator 4, is bonded in the inner side of the protruding structure of the magnetic steel fixing ring 13 through a process, provides a magnetic field, and is used for outputting magnetic force;

[0049] Outer ring magnetic steel 7, arranged on the side of inner ring magnetic steel 6, is bonded to the outer side of the protruding structure of magnetic steel fixing ring 13 and the inner side of motor shell 5 through a process, and is used for jointly outputting magnetic force with inner ring magnetic steel 6.

[0050] Magnetic steel fixing ring 13, circular ring structure, is arranged on the inner side of the bottom of motor shell 5 and is bonded to the motor shell 5 through a process, and has a protruding structure in the middle, which is used for positioning and fixing inner ring magnetic steel 6.

[0051] In the embodiment, an air gap is left between inner ring magnetic steel 6 and outer ring magnetic steel 7, inner ring magnetic steel 6 and outer ring magnetic steel 7 in the magnetic force device cooperate to jointly output magnetic force, the original air gap in the motor is reduced, the magnetic field leakage is reduced, the cogging effect is reduced, the air gap magnetic density of the motor is improved, the interference magnetic density is reduced, and the efficiency of the motor is optimized.

[0052] In the embodiment, the thicknesses of inner ring magnetic steel 6 and outer ring magnetic steel 7 are the same, and the sum of the total thicknesses of inner ring magnetic steel 6 and outer ring magnetic steel 7 and the air gap thickness is equal to the thickness of a single magnetic steel used in the motor in the prior art, so that the motor efficiency is improved without increasing the occupied space of inner ring magnetic steel 6 and outer ring magnetic steel 7.

[0053] In the embodiment, the copper pipe is connected with a printed circuit board 8, and various electronic elements are further connected.

[0054] In the embodiment, the other central components include:

[0055] Friction plate 10, arranged on the inner bottom side of copper pipe 3, is used for reducing the wear of the ball head of shaft 1;

[0056] Clamp ring 11, arranged in the copper pipe 3, is used for locking shaft 1 and preventing the motor shell 5 or the heat dissipation fan blade from falling off;

[0057] Bearing 2, arranged in the copper pipe 3 and located on the upper side of clamp ring 11, is used for supporting motor shell 5 and reducing friction;

[0058] Positioning ring 12, arranged on the upper side of bearing 2, is used for fixing bearing 2.

[0059] In the embodiment, the motor for a heat dissipation fan further includes winding coil 14, which is wound on stator 4 through an automatic process.

[0060] Embodiment 2

[0061] Figure 1 The structure diagram of the motor for a heat dissipation fan provided in the embodiment, Figure 3 The structure diagram of the motor for a heat dissipation fan provided in the embodiment, Figure 1 The exploded view of the motor for a heat dissipation fan, Figure 4 The exploded view of the motor for a heat dissipation fan, Figure 1 The product assembly diagram of the motor for a heat dissipation fan and the heat dissipation fan.

[0062] With reference to Figure 3 and Figure 4 , the copper tube 3 is placed on the fan base 15 by a process of press riveting, the printed circuit 8 is jointly pressed with the stator 4 around the copper tube, and is placed on the upper side of the fan base 15. The friction plate 10, the positioning ring 12, the bearing 2 and the clamping ring 11 are placed inside the copper tube by automatic process means respectively, the shaft 1 is welded with the motor shell 5, and the shaft 1 is bonded concentrically with the motor shell 5 and the fan blades 16 by process means, serving as the rotor of the heat-dissipating fan.

[0063] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Other different forms of changes or variations can be made on the basis of the above description for those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present utility model creation.

Claims

1. A motor for a cooling fan, characterized in that, include: The shaft (1) is rotated inside the copper tube (3) via the bearing (2) and connected to the motor housing (5) to support the motor housing (5) and support the rotation of the cooling fan blades (16); The stator (4), including stator laminations and an insulating frame, is sleeved around the copper tube (3) and used for winding the coil (14) to form the motor armature; A magnetic device is provided on the periphery of the stator (4) to increase the magnetic force on the periphery of the stator (4); The motor housing (5) is located around the magnetic device and is connected to the copper tube (3) and the cooling fan blades (16) respectively via the motor base (9) to prevent magnetic leakage and protect the magnetic device. The copper tube (3) is hollow inside and is used to place and fix the shaft (1), accommodate the bearing (2) and fix other central components.

2. The motor for a cooling fan according to claim 1, characterized in that, The magnetic device includes: The inner ring magnet (6) is located on the periphery of the stator (4) and is used to output magnetic force; The outer ring magnet (7) is located around the inner ring magnet (6) and is used to output magnetic force together with the inner ring magnet (6); The magnet fixing ring (13) has a raised structure in the middle for positioning and fixing the inner ring magnet (6).

3. The motor for a cooling fan according to claim 2, characterized in that, An air gap is left between the inner ring magnet (6) and the outer ring magnet (7).

4. The motor for a cooling fan according to claim 2, characterized in that, The inner ring magnet (6) has the same thickness as the outer ring magnet (7).

5. The motor for a cooling fan according to claim 3, characterized in that, The sum of the total thickness of the inner ring magnet (6) and the outer ring magnet (7) and the air gap thickness is equal to the thickness of a single magnet used in the motor.

6. The motor for a cooling fan according to claim 1, characterized in that, A printed circuit board (8) is connected to the copper tube (3).

7. The motor for a cooling fan according to claim 1, characterized in that, The other central components include: Friction plate (10) is set on the bottom side inside the copper tube (3) to reduce the wear of the ball head of the shaft (1); The retaining ring (11) is located inside the copper tube (3) and is used to lock the shaft (1) to prevent the motor housing (5) or the cooling fan blades from falling off. The bearing (2) is located inside the copper tube (3) and above the retaining ring (11) to support the motor housing (5) and reduce friction. The positioning ring (12) is located on the upper side of the bearing (2) and is used to fix the bearing (2).

8. The motor for a cooling fan according to claim 1, characterized in that, It also includes a winding coil (14) wound on the stator (4).

Images