Cooling fan with magnetic type axis structure

Abstract

A cooling fan with a magnetic attraction type axis structure comprises a shell, a stator and a fan rotor. The shell is formed by combining an upper cover and a base, and an assembly cavity is formed in the shell; the stator is fixedly arranged in the assembly cavity, and the fan rotor is coaxially arranged on the stator in a sleeving manner; a shaft tube part is convexly arranged on the base corresponding to the axis of the fan rotor, and a magnetic attraction piece is arranged in the shaft tube part; the magnetic attraction piece comprises a magnetic ring body and a shaft receiving piece assembled in the magnetic ring body; the magnetic ring body is positioned in the bottom section of the shaft tube part, the shaft receiving piece is positioned in the bottom end of a ring hole of the magnetic ring body or at the bottom of the ring hole, and the top face of the shaft receiving piece is used for abutting against the bottom end of the axis of the fan rotor in a pivoted mode. By adding the magnetic ring body, the supporting length of the bearing can be increased, and the service life of the fan is further prolonged. The magnetic ring body can effectively adsorb the axis of the rotor when the fan rotates, so that the fan rotor cannot be separated from the shell base to cause clamping and abnormal noise.

Description

Technical Field

[0001] The utility model relates to a heat dissipation fan, in particular to a heat dissipation fan with a magnetic attraction type shaft structure. Background Art

[0002] Traditional cooling fans usually have many considerations and balances in their structural design due to the need for thin design. However, in the long-term use of existing cooling fans, some shortcomings caused by design defects are still found, such as:

[0003] 1. Since the rotor axis of the fan needs to be positioned, a retaining ring design is usually required, but this retaining ring design will shorten the bearing length, which will affect the operating life of the cooling fan over time;

[0004] 2. When a traditional cooling fan is in operation, there is a certain probability that the fan rotor will separate from the base of the casing, causing it to get stuck and make abnormal noise due to problems with the assembly process accuracy or external vibration.

[0005] Therefore, in view of the problems existing in the above-mentioned existing heat dissipation fan technology, how to develop an innovative structure that is more ideal and practical is indeed a goal and direction that the relevant industry needs to further think about and break through.

[0006] In view of this, the inventor, based on his many years of experience in manufacturing, developing and designing related products, has designed and carefully evaluated the above-mentioned goals and finally obtained a creation that is truly practical. Summary of the invention

[0007] The utility model aims to provide a heat dissipation fan with a magnetic attraction type shaft structure.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A heat dissipation fan with a magnetic axis structure comprises a housing, a stator and a fan rotor;

[0010] The shell is composed of an upper cover and a base, and an assembly chamber is formed in the shell;

[0011] The stator is fixedly arranged in the assembly chamber of the housing, and the fan rotor is rotatably arranged in the assembly chamber and coaxially sleeved on the stator;

[0012] A shaft tube portion is convexly arranged on the base corresponding to the axis of the fan rotor, and a magnetic attraction member is arranged in the shaft tube portion;

[0013] Among them, the magnetic attraction component includes a magnetic ring body and a shaft-receiving plate assembled in the magnetic ring body; the magnetic ring body is positioned in the bottom section of the shaft tube part, and the shaft-receiving plate is positioned inside or at the bottom of the bottom end of the ring hole of the magnetic ring body, and the top surface of the shaft-receiving plate is pivotally connected to the bottom end of the axis of the fan rotor.

[0014] According to a further technical solution, the stator is provided with magnetic poles, and the fan rotor is provided with a permanent magnetic ring, which interacts with the alternating magnetic field of the stator magnetic poles.

[0015] A further technical solution also includes a bearing, which is assembled in the shaft tube portion and sleeved on the axis of the fan rotor, and the bearing and the axis are clearance-matched; the bottom of the bearing abuts against the top surface of the magnetic ring body.

[0016] A further technical solution also includes a pressure ring, which is coaxially arranged with the axis of the fan rotor and acts on the upper end of the bearing to press the bearing and the magnetic ring body on the axis to position them in the shaft tube.

[0017] According to a further technical solution, the axis of the fan rotor is a metal axis.

[0018] According to a further technical solution, the magnetic ring body can be a metal magnetic ring body or a rubber magnetic ring body.

[0019] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0020] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0021] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0022] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0023] The working principle and advantages of this utility model are as follows:

[0024] 1. The utility model can remove the traditional buckle ring design for positioning the fan rotor axis by adding a magnetic ring, thereby increasing the support length of the bearing and further extending the operating life of the thin cooling fan.

[0025] 2. The utility model can generate magnetic attraction to the axis of the fan rotor through the design of the magnetic ring, so when the fan rotates, it can effectively adsorb the rotor axis, so that the fan rotor will not separate from the base of the shell and cause jamming and abnormal noise.

[0026] 3. The utility model uses the magnetic attraction of the magnetic ring to attract the axis, so that the axis and the bearing remain in a non-contact state through the attraction, thereby increasing the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 A cross-sectional view of an embodiment of the present invention Figure 1 ;

[0028] Attached Figure 2 Decomposition explosion for the utility model embodiment Figure 1 (from a top-down perspective);

[0029] Attached Figure 3 Decomposition explosion for the utility model embodiment Figure 2 (upward viewing angle);

[0030] Attached Figure 4 A cross-sectional view of an embodiment of the present invention Figure 2 ;

[0031] Attached Figure 5 for Figure 4 Exploded diagram.

[0032] In the above figures: 1. stator; 2. fan rotor; 3. housing; 4. shaft tube; 5. bearing; 6. upper cover; 7. base; 8. shaft center; 9. magnetic attraction piece; 10. magnetic ring body; 11. shaft receiving plate; 12. pressure ring. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0034] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0035] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0036] See attached Figures 1 to 5 As shown, a heat dissipation fan with a magnetic axis structure includes a housing 3, a stator 1 and a fan rotor 2.

[0037] The housing 3 is composed of an upper cover 6 and a base 7 , and an assembly chamber is formed in the housing 3 .

[0038] The stator 1 is fixedly disposed in the assembly chamber of the housing 3 , and the fan rotor 2 is rotatably disposed in the assembly chamber and coaxially sleeved on the stator 1 .

[0039] A shaft tube portion 4 is protruded on the base 7 corresponding to the axis 8 of the fan rotor 2 , and a magnetic attraction member 9 is disposed in the shaft tube portion 4 .

[0040] The magnetic attraction member 9 includes a magnetic ring body 10 and a bearing plate 11 (i.e., an axial force bearing plate) assembled in the magnetic ring body 10. The magnetic ring body 10 is positioned in the bottom section of the shaft tube 4, and the bearing plate 11 is positioned inside or at the bottom end of the ring hole of the magnetic ring body 10. The top surface of the bearing plate 11 is pivotally connected to the bottom end of the axis 8 of the fan rotor 2.

[0041] Preferably, the stator 1 is provided with magnetic poles, and the fan rotor 2 is provided with a permanent magnetic ring, which interacts with the alternating magnetic field of the magnetic poles of the stator 1 by induction.

[0042] The fan rotor 2 further comprises a bearing 5, which is assembled in the shaft tube 4 and sleeved on the shaft center 8 of the fan rotor 2, and the bearing 5 is loosely matched with the shaft center 8. The bottom of the bearing 5 abuts against the top surface of the magnetic ring 10.

[0043] Preferably, it further includes a pressure ring 12, which is coaxially arranged with the axis 8 of the fan rotor 2 and acts on the upper end of the bearing 5 to press the bearing 5 and the magnetic ring body 10 on the axis to position them in the shaft tube 4.

[0044] Preferably, the axis 8 of the fan rotor 2 is a metal axis.

[0045] Preferably, the magnetic ring body 10 can be made of metal or rubber, but no matter what material it is, it is an existing known material.

[0046] Compared with the prior art, the utility model can increase the support length of the bearing by adding a magnetic ring, thereby extending the operating life of the fan. The magnetic ring can effectively absorb the rotor axis when the fan rotates, so that the fan rotor will not separate from the housing base and cause jamming and abnormal noise; at the same time, by attracting the axis, the axis and the bearing are kept in a non-contact state through the attraction, thereby increasing the service life of the bearing.

[0047] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A heat dissipation fan with a magnetic axis structure, characterized in that: It includes a housing, a stator and a fan rotor; The shell is composed of an upper cover and a base, and an assembly chamber is formed in the shell; The stator is fixedly arranged in the assembly chamber of the housing, and the fan rotor is rotatably arranged in the assembly chamber and coaxially sleeved on the stator; A shaft tube portion is convexly arranged on the base corresponding to the axis of the fan rotor, and a magnetic attraction member is arranged in the shaft tube portion; Among them, the magnetic attraction component includes a magnetic ring body and a shaft-receiving plate assembled in the magnetic ring body; the magnetic ring body is positioned in the bottom section of the shaft tube part, and the shaft-receiving plate is positioned inside or at the bottom of the bottom end of the ring hole of the magnetic ring body, and the top surface of the shaft-receiving plate is pivotally connected to the bottom end of the axis of the fan rotor.

2. The heat dissipation fan with a magnetic axis structure according to claim 1, characterized in that: The stator is provided with magnetic poles, and the fan rotor is provided with a permanent magnetic ring, which interacts with the alternating magnetic field of the stator magnetic poles.

3. The heat dissipation fan with a magnetic axis structure according to claim 1, characterized in that: It also includes a bearing, which is assembled in the shaft tube and sleeved on the axis of the fan rotor; the bottom of the bearing abuts against the top surface of the magnetic ring body.

4. The heat dissipation fan with a magnetic axis structure according to claim 3, characterized in that: It also includes a pressure ring, which is coaxially arranged with the axis of the fan rotor and acts on the upper end of the bearing to press the bearing and the magnetic ring body on the axis to position them in the shaft tube.

5. The heat dissipation fan with a magnetic axis structure according to claim 1, characterized in that: The axis of the fan rotor is a metal axis.

Images