Motor base, fan assembly and electronic equipment

Abstract

A motor base, a fan assembly and an electronic device, the motor base, the motor base includes a base, a shaft connection and a vibration damping member, the base is provided with a relative upper surface and a lower surface, the shaft connection and the base limit each other, the shaft connection is assembled and fixed corresponding to the motor assembly, the shaft connection and the base are buffered by a vibration damping member, the shaft connection at least partially protrudes upward above the upper surface, the hardness of the vibration damping member is softer than the base part in contact with the vibration damping member, and the hardness of the vibration damping member is softer than the shaft connection part in contact with the vibration damping member, so as to achieve better vibration reduction and noise reduction effects.

Description

Technical field

[0001] The present application relates to a motor base, and more particularly to a motor base, a fan assembly, and an electronic device for reducing vibration transmission to lower noise. [Background Technology]

[0002] With the continuous advancement of technology, the size of integrated circuits and electronic components has become increasingly miniaturized, allowing for higher density configurations, resulting in powerful computing power and functionality. However, this also requires good heat dissipation to maintain normal operating temperatures. Common cooling fans are heat dissipation devices that use rotating blades to drive airflow or fluid to achieve good air cooling effects. Common cooling fans are often accompanied by unpleasant noise when in operation. The reasons for this are mainly the following: (1) noise generated by the overall vibration caused by the rotation of the fan blades, (2) noise generated at the air inlet and outlet due to airflow disturbances or flow field disturbances when the air flows through the fan, and (3) noise generated by the vibrations caused by the switching of the motor magnetic field and the operation of the fan blades.

[0003] Existing motor bases with shock absorption functions, such as Taiwan Patent No. I318559 "Heat Dissipation Structure Base", please refer to Figure 1 As shown, the existing motor base 7 with a shock-absorbing function mainly has a base 71, and the base 71 is provided with a shaft tube 711. The shaft tube 711 is used to support the rotation of a fan wheel, and the base 71 is provided with a plurality of grooves 72. The grooves 72 are arranged around the range outside the shaft tube 711; thereby, the design of the grooves 72 can be used to reduce the transmission of vibration from the shaft tube 711 due to the rotation of the fan wheel.

[0004] However, the existing motor base 7 must form a groove 72 on the surface of the base 71, which causes the axial thickness of the base 71 corresponding to the groove 72 to become thinner, thereby reducing the overall structural strength of the motor base 7. After the motor base 7 is used to assemble components such as impellers, stators or circuit boards, the motor base 7 cannot provide sufficient supporting strength, thereby affecting the product quality and service life of the motor.

[0005] In order to solve the problems arising from the actual use of the conventional motor base 7, a conventional heat dissipation fan frame 8 with a shock-absorbing function is disclosed in the Chinese Utility Model Patent No. 201020004026.0 "Heat Dissipation Fan Frame". Figure 2As shown, the heat dissipation fan frame 8 has a base plate 81, which is provided with an axial connection portion 811 and a blocking portion 82 surrounding the axial connection portion 811, and the blocking portion 82 is used to reduce vibration and noise; in addition, in the axial direction of the axial connection portion 811, the thickness of the axial cross-section of the blocking portion 82 is greater than the thickness of the axial cross-section of the base plate 81, so as to improve the structural strength of the heat dissipation fan frame 8.

[0006] The heat dissipation fan frame 8 utilizes the barrier portion 82 protruding from the base plate 81, which can simultaneously enhance the structural strength and reduce vibration. However, since the thickness of the axial section of the barrier portion 82 is greater than the thickness of the axial section of the base plate 81, the barrier portion 82 is thicker than the base plate 81. Figure 1 The vibration reduction effect that can be achieved by the groove 72 shown is quite limited, so there is still a need for improvement.

[0007] Therefore, how to improve the relevant structure to reduce noise is indeed a problem that those skilled in the art need to consider and solve. [Summary of the invention]

[0008] The purpose of this application is to provide a motor base, a fan assembly and an electronic device with excellent vibration reduction and noise reduction effects.

[0009] To achieve the above objectives, this application is implemented through the following technical solutions:

[0010] A motor base, comprising a base, a shaft connection and a vibration damping member, wherein the base is provided with relative upper and lower surfaces, and is characterized in that: the shaft connection and the base limit each other, the shaft connection is assembled and fixed corresponding to the motor assembly, the shaft connection and the base are buffered by a vibration damping member, the shaft connection at least partially protrudes upward above the upper surface, the hardness of the vibration damping member is softer than the base portion in contact with the vibration damping member, and the hardness of the vibration damping member is softer than the shaft connection portion in contact with the vibration damping member.

[0011] Furthermore, the base is recessed to form a groove or penetrated to form a through hole, the shaft connection portion is inserted into the groove or through hole, and the vibration damping member is combined between the inner wall of the groove or through hole and the shaft connection portion.

[0012] Furthermore, when a through hole is formed on the base, a widened groove that is further recessed in the radial direction is formed on the inner wall surface of the through hole near the lower surface. The motor base also includes a fixing ring, which is sleeved and fixed on the outer surface of the shaft connection part and is at least partially located in the widened groove. The inner diameter of the widened groove is larger than the outer diameter of the fixing ring. The outer diameter of the fixing ring 7 is larger than the inner diameter of the through hole. The vibration damper is located above the fixing ring.

[0013] Furthermore, the base and the shaft connection portion are integrally connected at a local position.

[0014] Furthermore, the vibration damping member is filled in the middle of the position where the base and the shaft connection portion are limited to each other through injection molding.

[0015] Furthermore, the shaft connection portion can swing or vibrate relative to the base portion by means of the buffering of the vibration damping member.

[0016] Furthermore, the shaft connection portion is in the shape of a hollow metal tube with at least one end open, and the base is formed by injection molding of a plastic material.

[0017] Furthermore, the upper surface of the base protrudes upward to form a convex column, which is inserted into the shaft connection part from bottom to top, and a vibration damper is combined between the inner wall surface of the hollow metal tube of the shaft connection part and the outer surface of the convex column.

[0018] To achieve the above objectives, this application also discloses the following technical solutions:

[0019] A fan assembly comprises a motor base as described in any one of the above items, and also comprises a motor assembly, wherein the motor assembly comprises a stator assembly fixed to the axial connection portion, and a rotor assembly rotatably assembled on the axial connection portion, the stator assembly comprises a coil assembly sleeved on the outer periphery of the axial connection portion, the rotor assembly comprises an axis, a permanent magnet assembly fixed to the axis, and an impeller assembly fixed to the axis, the permanent magnet assembly surrounds the outer periphery of the coil assembly, the axis and the axial connection portion are rotatably connected via a bearing, and the coil assembly and the permanent magnet assembly interact to drive the rotor assembly to rotate relative to the stator assembly.

[0020] Furthermore, the base has an outer wall extending upward along the radial edge, and the base and the outer wall form an accommodating cavity opening upward, and the stator assembly and the rotor assembly are assembled in the accommodating cavity. The base has several air inlet channels formed around the axial connection part, and the several air inlet channels form a spiral structure.

[0021] To achieve the above objectives, this application also discloses the following technical solutions:

[0022] An electronic device is provided, wherein the fan assembly as described above is assembled inside the electronic device.

[0023] The beneficial effect of the present application is that the motor base, the fan assembly and the electronic equipment have better vibration reduction and noise reduction effects.

Brief Description of the Drawings

[0024] Figure 1 is a perspective view of a fan assembly disclosed in the present application;

[0025] Figure 2 yes Figure 1 A perspective schematic diagram of the fan assembly shown is shown from another angle;

[0026] Figure 3 is a partial exploded perspective view of a fan assembly disclosed in the present application, showing a perspective schematic diagram of a motor base, a fixing ring, and a vibration damping ring separated from the fan assembly;

[0027] Figure 4 It is from Figure 1 Cross-sectional view along line AA;

[0028] Figure 5 It is from Figure 1 The cross-sectional view along line AA further shows the exploded perspective view of the fan assembly. [Specific implementation method]

[0029] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intervening element. When an element is referred to as being "assembled to" another element, it may be directly assembled to the other element or there may be an intervening element.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] In addition, in order to make the description of this application clear and accurate, all directions involved should be referred to as Figure 1 The extension direction of the surface where the X-axis and Y-axis are located is defined as the axial direction; the direction where the Z-axis is located is defined as the up-down direction, where the positive direction of the Z-axis is upward.

[0033] Please refer to Figures 1 to 5Figure 1 shows a fan assembly (unnumbered) disclosed in the present application. The fan assembly includes a motor base (unnumbered), a stator assembly (unnumbered) coupled to the motor base, and a rotor assembly (unnumbered) rotatably assembled on the motor base. When the stator assembly is energized, it drives the rotor assembly to rotate, thereby converting electrical energy into mechanical energy. The rotation of the rotor assembly drives the flow of air to form an airflow. The fan assembly of the present application is generally assembled inside an electronic device, such as a computer host, and is used in conjunction with a heat pipe (not shown) and other structures to achieve a heat dissipation effect when necessary.

[0034] Please refer to Figures 3 to 5 As shown, the motor base includes a base 11, a shaft connection portion 12 and a vibration damper 13. The base 11 is provided with an upper surface 111 and a lower surface 112 relative to each other. The shaft connection portion 13 is limited by the base 11. The motor assembly is assembled and fixed corresponding to the shaft connection portion 12. The vibration damper 13 is used to cushion the shaft connection portion 13 and the base 11. The shaft connection portion 13 at least partially protrudes upward above the upper surface 111. In the present application, the hardness of the vibration damper 13 is softer than the part of the base 11 in contact with the vibration damper 13; the hardness of the vibration damper 13 is softer than the part of the shaft connection portion 12 in contact with the vibration damper 13 (that is, the vibration damper 13 has better flexibility than the base 11 and the shaft connection portion 12, but at the same time needs to have a certain degree of elasticity). The vibration damper 13 can be made of silicone or rubber material with a certain degree of elasticity, but it is not suitable to select materials that are prone to plastic deformation. The shaft connection portion 12 can swing or vibrate relative to the base portion 11 by means of the damping of the vibration damping member 13 .

[0035] Please refer to the reference Figures 2 to 5 As shown, the stator assembly includes a coil assembly 2 sleeved around the outer periphery of a shaft connection portion 12. The rotor assembly includes an axis 3, a permanent magnet assembly 4 fixed to the axis 3, and an impeller assembly 5 fixed to the axis 3. The permanent magnet assembly 4 surrounds the outer periphery of the coil assembly 2. The axis 3 and the shaft connection portion 12 are rotationally connected via a bearing 6. The interaction between the coil assembly 2 and the permanent magnet assembly 4 drives the rotor assembly to rotate relative to the stator assembly.

[0036] When the coil assembly 2 is energized, it interacts with the permanent magnet assembly 4. This creates a switching process between the magnetic field generated by the coil assembly 2 and the magnetic field of the permanent magnet assembly 4. During this process, the coil assembly 2 and the permanent magnet assembly 4 vibrate relative to the base 11. This vibration is transmitted to the base 11 via the shaft connection 12. Because the base 11 is assembled and fixed within the electronic device, the vibration of the base 11 can affect other components within the electronic device, posing a risk to the normal use of the electronic device. Furthermore, the vibration can generate noise, causing sensory discomfort.

[0037] Please refer to Figures 3 to 5 As shown, the vibration damping member 13 can buffer and absorb the vibration transmitted from the coil assembly 2 and the permanent magnet assembly 4 to the shaft connection portion 12, thereby greatly reducing the vibration intensity of the base 11, thereby improving the above-mentioned adverse effects.

[0038] In the present application, the combination of the base 11, the shaft connection portion 12 and the vibration damping member 13 includes at least the following embodiments:

[0039] Example 1: A through hole 110 is formed through the base 11. One end of the connecting portion 12 is inserted into the through hole 11 from top to bottom. The vibration damper 13 is coupled between the inner wall of the through hole 11 and the connecting portion 12. In this embodiment, the vibration damper 13 can be a separate component that is assembled and fixed between the inner wall of the through hole 11 and the connecting portion 12. Of course, the vibration damper 13 can also be injected or glued into the space between the inner wall of the through hole 11 and the connecting portion 12. In this embodiment, the connecting portion 12 can be made of either plastic or metal.

[0040] In the first embodiment, a radially further recessed widened groove 1101 is formed around the inner wall of the through hole 110 near the lower surface 112. The motor base further includes a fixing ring 7, which is sleeved and fixed to the outer surface of the shaft connection portion 12 and at least partially located within the widened groove 1101. The inner diameter of the widened groove 1101 is larger than the outer diameter of the fixing ring 7, which is also larger than the inner diameter of the through hole 110. The vibration damper 13 is located above the fixing ring 7. In the present application, the fixing ring 7 is preferably a metal ring. The fixing ring 7 is used to secure the shaft connection portion 12 to prevent it from falling upward from the base 12.

[0041] Embodiment 2: The base 11 and the axial connection part 12 are integrally provided by injection molding, but their structure is similar to that of the first embodiment, and the position where the base 11 and the axial connection part 12 are integrally connected is only at a local position between the inner wall surface of the through hole 110 of the base 11 and the corresponding outer surface of the axial connection part 12. In this embodiment, the strength of the connecting position where the base 11 and the axial connection part 12 are integrally connected can be designed to be appropriately weaker so as not to affect the swinging or vibration of the axial connection part 12 relative to the base 11 as much as possible. In this embodiment, the axial connection part 12 and the base 11 are both made of plastic material, and the above-mentioned connecting position is only to enable the axial connection part 12 and the base 11 to be formed by one-time injection molding. In this embodiment, the vibration damper 13 is filled in the area between the inner wall of the through hole 11 and the axial connection part 12 except the connecting position by secondary injection molding or glue pouring.

[0042] Example 3: The upper surface 111 of the base 11 is recessed downward to form a groove (not shown, but not extending through the base 11). One end of the connecting portion 12 is inserted into the groove from top to bottom. The vibration damper 13 is coupled between the radial inner wall of the groove and the connecting portion 12. In this embodiment, the vibration damper 13 can also be a separate component that is assembled and fixed between the inner wall of the groove and the connecting portion 12. Alternatively, the vibration damper 13 can be injected or filled between the inner wall of the groove and the connecting portion 12. In this embodiment, the connecting portion 12 can be made of either plastic or metal.

[0043] Example 4: The upper surface 111 of the base 11 protrudes upward to form a protruding column (not shown). The connecting portion 12 is hollow and tubular. The protruding column is inserted into the connecting portion 12 from bottom to top. A vibration damper 13 is integrated between the inner wall surface (unnumbered) of the connecting portion 12 and the outer surface of the protruding column. In this embodiment, the vibration damper 13 can also be a separate component that is assembled and fixed between the inner wall surface of the connecting portion 12 and the protruding column. Of course, the vibration damper 13 can also be filled between the inner wall of the groove and the connecting portion 12 through injection molding or glue filling. In this embodiment, the connecting portion 12 can be made of plastic or metal.

[0044] Please refer to Figure 1 、 Figures 3 to 5 As shown, the stator assembly includes a coil assembly 2 sleeved around the outer periphery of a shaft connection 12. The rotor assembly includes a shaft core 3, a permanent magnet assembly 4 fixed to the shaft core 3, and an impeller assembly 5 fixed to the shaft core 3. The permanent magnet assembly 4 surrounds the outer periphery of the coil assembly 2. The shaft core 3 is inserted into the shaft connection 12 and is rotationally connected to the shaft connection 12 via a bearing 6. The coil assembly 2 and the permanent magnet assembly 4 interact to drive the rotor assembly to rotate relative to the stator assembly.

[0045] Please refer to Figure 2 、 Figure 3 and Figure 5 As shown, the base 11 further has an outer peripheral wall 113 extending upward along its radial edge. The base 11 and the outer peripheral wall 113 form an upwardly opening accommodating cavity (not numbered), within which the stator and rotor assemblies are assembled. The base 11 is formed with a plurality of air inlet passages 114 extending through the periphery of the shaft connection portion 12, each of which forms a spiral structure.

[0046] In the present application, a vibration damper 13 is added between the base 11 and the shaft connection portion 12, and the vibration damper 13 absorbs the swing or vibration transmitted from the shaft connection portion 12, thereby achieving vibration reduction and noise reduction effects for the entire fan assembly.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A motor base, comprising a base, a shaft connection portion, and a vibration damping member, wherein the base has an upper surface and a lower surface facing each other, and wherein: The shaft connection portion is limited by the base portion, the shaft connection portion is assembled and fixed correspondingly to the motor assembly, a vibration damping member is used to achieve buffering between the shaft connection portion and the base portion, the shaft connection portion at least partially protrudes upward above the upper surface, the vibration damping member is softer than the base portion in contact with the vibration damping member, and the vibration damping member is softer than the shaft connection portion in contact with the vibration damping member; A through hole is formed through the base, the shaft connecting portion is inserted into the through hole, and the vibration damping member is combined between the inner wall surface of the through hole and the outer surface of the shaft connecting portion; A widened groove is formed on the inner wall surface of the through hole near the lower surface and is further recessed in the radial direction. The motor base further includes a fixing ring, which is sleeved and fixed on the outer surface of the shaft connection portion and is at least partially located in the widened groove. The inner diameter of the widened groove is larger than the outer diameter of the fixing ring, and a gap is formed between the inner wall surface of the widened groove and the outer surface of the fixing ring; The outer diameter of the fixing ring is larger than the inner diameter of the through hole, and the vibration damping member is located above the fixing ring; The fixing ring is a metal ring, and the shaft connection portion is made of metal; The outer periphery of the shaft connection portion protrudes above the vibration damping component to form a limiting portion, and the limiting portion can limit the upward movement of the vibration damping component relative to the shaft connection portion.

2. The motor base according to claim 1, wherein: The base portion and the shaft connection portion are integrally connected at a local position.

3. The motor base according to claim 1, wherein: The vibration damping component is filled in the middle of the position where the base and the shaft connection portion are limited to each other through injection molding.

4. The motor base according to claim 1, wherein: The shaft connection portion can swing or vibrate relative to the base portion by means of the buffering of the vibration damping element.

5. The motor base according to claim 1, wherein: The shaft connection portion is in the shape of a hollow metal tube with at least one end open, and the base portion is formed by injection molding of a plastic material.

6. The motor base according to claim 5, wherein: The upper surface of the base protrudes upward to form a convex column, which is inserted into the shaft connection part from bottom to top. A vibration damper is combined between the inner wall surface of the hollow metal tube of the shaft connection part and the outer surface of the convex column.

7. A fan assembly comprising the motor base according to any one of claims 1 to 6, characterized in that: It also includes a motor assembly, which includes a stator assembly fixed to the shaft connection part and a rotor assembly rotatably assembled on the shaft connection part. The stator assembly includes a coil assembly sleeved on the outer periphery of the shaft connection part. The rotor assembly includes an axis, a permanent magnet assembly fixed to the axis, and an impeller assembly fixed to the axis. The permanent magnet assembly surrounds the outer periphery of the coil assembly. The axis and the shaft connection part are rotatably connected via a bearing. The coil assembly and the permanent magnet assembly interact with each other to drive the rotor assembly to rotate relative to the stator assembly.

8. The fan assembly according to claim 7, wherein: The base also has an outer wall extending upward along the radial edge, and the base and the outer wall form an accommodating cavity opening upward, and the stator assembly and the rotor assembly are assembled in the accommodating cavity. The base is formed with a plurality of air inlet channels passing through the four sides of the shaft connection part, and the plurality of air inlet channels form a spiral structure.

9. An electronic device, characterized in that: The fan assembly as claimed in claim 7 is assembled inside the electronic device.

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