An integrated fan capable of resisting drop impact and preventing bearing damage

Abstract

The utility model discloses an integrated fan which is resistant to falling impact and bearing damage. A support tube extending upward is arranged at the center of a bracket. A rotating shaft is arranged coaxially inside the support tube. A rotating shaft sleeve is provided with a bearing group. The rotating shaft is rotatably connected to the support tube through the bearing group. The rotating shaft sleeve is provided with a limiting elastic component. The rotating shaft can perform axial elastic movement relative to the supporting tube through the limiting elastic component. The utility model can avoid axial movement, and an elastic gap is provided to buffer the axial movement of the rotating shaft during the falling process to avoid position deviation. Two bearings are provided in the utility model, which effectively avoids the design of a single bearing causing the inner ring or outer ring of the bearing to be deformed due to symmetrical torque. At the same time, the limiting elastic component can also effectively buffer a part of the torque, thereby enabling the utility model to have a certain anti-fall ability.

Description

Technical Field

[0001] The utility model relates to the technical field related to fan motors, and in particular to an integrated fan capable of resisting falling impact and preventing bearing damage. Background Art

[0002] Generally, a fan requires a motor as a power source. The motor is installed in the base of the fan. At the same time, the fan needs to lead out wires to electrically connect to the control circuit board. The wires need to be stabilized by a fixed object. Therefore, in the assembly and production of motors, companies usually need to purchase or make fasteners additionally, and also need to prefabricate a position. The fasteners can cooperate with this prefabricated hole or snap-in position to bundle the wires. The motor produced in this way requires more costs and assembly steps, and requires more efforts in production time and cost.

[0003] In addition, the fan is likely to fall during transportation, manufacturing, and installation. When it falls, the fan blades or its stator or rotor may collide, causing the shaft to move axially and the radial force to cause the bearing to deform. The above situations will cause the fan to make abnormal noises when rotating, and even the friction after deformation will be so large that excessive heat will accumulate and affect the performance of the fan. Utility Model Content

[0004] The utility model aims to provide an integrated fan which is resistant to falling impact and bearing damage, so as to overcome the shortcomings in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An integrated fan resistant to falling impact and bearing damage includes a bracket for fixing a motor in a fan body, the bracket is provided with a downwardly extending slot, the upper part of the slot is provided with a constriction, and the constriction is formed by extending the side wall in the middle of the slot toward the central axis of the slot.

[0007] To further explain, the card slot is provided on the side wall of the bracket, and a plurality of fixing buckles are extended outward from the side wall of the bracket, and the fixing buckle ring is provided on the side wall of the bracket.

[0008] To further explain, the end of the fixing buckle is configured as an annular bayonet for fixing the bracket in the fan body.

[0009] To further explain, a support tube extending upward is arranged at the center of the bracket, a rotating shaft is arranged coaxially inside the support tube, a rotating shaft sleeve is provided with a bearing group, the rotating shaft is rotatably connected to the support tube through the bearing group, and the rotating shaft sleeve is provided with a limiting elastic component, through which the rotating shaft can undergo axial elastic movement relative to the support tube.

[0010] To further explain, the limiting elastic component includes a spring piece, the bearing group limiting sleeve is arranged on the rotating shaft, and the spring piece is respectively in contact with the inner wall of the support tube and the bearing group.

[0011] To further explain, the bearing group includes a second bearing, and the limiting elastic component includes a snap ring, which is snapped onto a side wall near one end of the rotating shaft. Countersunk holes are provided at both ends of the support tube, and the second bearings are provided in one of the countersunk holes. The two side walls of the second bearing are respectively abutted with a snap ring and a spring sheet, and the second bearing abuts against the inner bottom wall of the countersunk hole through the spring sheet.

[0012] To further explain, the bearing group also includes a first bearing, and the limiting elastic component also includes a graphite gasket, which is clamped on the side wall near one end of the rotating shaft, and countersunk holes are provided at both ends of the support tube, and the two sides of the first bearing are respectively abutted against the graphite gasket and the inner bottom wall of the countersunk hole.

[0013] To further explain, a fan blade is fixedly provided at one end of the rotating shaft, an accommodating opening is extended to one side in the middle of the fan blade, a magnetic ring is interference fitly provided on the inner wall of the accommodating opening, a winding core and a PCB board are fixedly provided on the outer wall of the supporting tube, the winding core is used for winding electric wires, an outermost pin is fixedly provided in the winding core, the outermost pin extends to one side of the winding core and is fixedly connected with the PCB board.

[0014] To further explain, the fan blades are arranged coaxially with the rotating shaft, and a plurality of blades are arranged in a circular array on the top of the fan blades.

[0015] To further explain, the support tube leads out a wire connector which is electrically connected to the PCB board and is wound around the winding core.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] The utility model does not need to use additional fasteners, and only needs to open a slot in the bracket to buckle the wire. The design of the slot can prevent the wire from escaping in the opposite direction. The production time of the fan is shortened, the production cost is reduced, and the wire can be bundled.

[0018] The utility model can avoid axial movement, and is provided with an elastic gap to buffer the axial movement of the rotating shaft during the falling process to avoid position deviation. The utility model is provided with two bearings, which effectively avoids the design of a single bearing causing the inner ring or outer ring of the bearing to deform due to symmetrical torque. At the same time, the limiting elastic component provided can also effectively buffer a part of the torque, thereby enabling the utility model to have a certain anti-fall ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model ignoring the fan blades, magnetic rings and winding core.

[0022] Notes on the attached drawings:

[0023] 1. Magnetic ring; 2. Fan blades; 3. Accommodating opening; 4. Rotating shaft; 5. First bearing; 6. Second bearing; 7. Snap ring; 8. Graphite gasket; 9. Spring piece; 10. Countersunk hole; 11. Through hole; 12. Support tube; 13. Bracket; 14. PCB board; 15. Winding core; 16. Outer pin; 17. Shrinkage; 18. Slot; 19. Fixing buckle. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When the number of an element is referred to as "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific implementations and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] The present invention is described in detail below in conjunction with the embodiments shown in the accompanying drawings:

[0028] like Figure 1-3As shown, in this embodiment, an integrated fan that resists drop impact and bearing damage is provided, including a bracket 13 for fixing the motor in the fan body, the bracket 13 is provided with a downwardly extending slot 18, the slot 18 is used to gather the wires, and at the same time can limit the position of the wires to prevent swinging or even winding, and the upper part of the slot 18 is provided with a constriction 17, which is formed by the side wall in the middle of the slot 18 extending toward the central axis of the slot 18. The setting of the constriction 17 can narrow the wire inlet of the slot 18 to prevent the wires that have been loaded into the slot 18 from falling out.

[0029] In this embodiment, the slot 18 is provided on the side wall of the bracket 13, and the side wall of the bracket 13 also extends outwardly to form a plurality of fixing buckles 19, which are arranged on the side wall of the bracket 13. When the entire bracket 13 needs to be fixed on the fan body, a plurality of bolts are used to penetrate the fixing buckles 19 to be threadedly connected with the fan body, so as to stabilize the specific position of the bracket 13 on the fan body. To further explain, the end of the fixing buckle 19 is set as an annular bayonet, and the bolt is penetrated through the middle of the annular bayonet; so as to fix the bracket 13 in the fan body.

[0030] In this embodiment, a support cylinder 12 extending upward is arranged at the center of the bracket 13. The support cylinder 12 is mainly made of one piece with the bracket 13. The two can be regarded as one component. A rotating shaft 4 is coaxially arranged inside the supporting cylinder 12. The rotating shaft 4 is sleeved with a bearing group. The rotating shaft 4 is rotatably connected with the supporting cylinder 12 through the bearing group. The bearing group specifically refers to two bearings. The inner ring of the bearing is in contact with the side wall of the rotating shaft 4, and the outer ring of the bearing is in contact with the inner wall of the supporting cylinder 12. The rotating shaft 4 is sleeved with a limiting elastic component. The rotating shaft 4 can perform axial elastic movement relative to the supporting cylinder 12 through the limiting elastic component. The axial elastic movement mentioned here is actually the corresponding axial movement when the rotating shaft 4 is subjected to external force, and the above-mentioned limiting elastic component can help the rotating shaft 4 to reset. The reset action here is the above-mentioned axial elastic movement.

[0031] In this embodiment, the rotating shaft 4 is actually limited in the support tube 12 by a limiting elastic component, but this limitation is not fixed, but can be limited within a certain axial range. Specifically, the limiting elastic component includes a spring piece 9, and the bearing group limiting sleeve is arranged on the rotating shaft 4. The spring piece 9 is respectively abutted against the inner wall of the support tube 12 and the bearing group. Since the spring piece 9 is a bent elastic metal part, it itself can be elastically deformed. Its arrangement between the inner wall of the support tube 12 and the bearing group disguisedly sets a limiting threshold, that is, a buffer gap, for the assembly of the rotating shaft 4 and the support tube 12. When the fan blade 2 (mentioned below) is displaced by an axial external force, the spring piece 9 can absorb this external force and gradually balance the position of the rotating shaft 4.

[0032] The bearing group includes a second bearing 6, and the limiting elastic component includes a snap ring 7. The snap ring 7 is clamped on the side wall near one end of the rotating shaft 4. Countersunk holes 10 are provided at both ends of the support tube 12. The second bearing 6 is arranged in one of the countersunk holes 10. The middle part of the support tube 12 is a structure that is through from head to tail (that is, a through hole 11 is provided in the middle part). At the same time, a pair of countersunk holes 10 are opened at the head and tail ends of the support tube 12. The radius of the countersunk hole 10 is larger than the middle through hole 11. The two side walls of the second bearing 6 are respectively abutted with a snap ring 7 and a spring piece 9, and the second bearing 6 abuts against the inner bottom wall of the countersunk hole 10 through the spring piece 9.

[0033] The bearing group also includes a first bearing 5, and the limiting elastic component also includes a graphite gasket 8, which is clamped on the side wall near one end of the rotating shaft 4. Countersunk holes 10 are provided at both ends of the support tube 12, and the two sides of the first bearing 5 are respectively abutted against the graphite gasket 8 and the inner bottom wall of the countersunk hole 10.

[0034] As mentioned above, the graphite gasket 8 and the retaining ring 7 are actually sleeved on the rotating shaft 4 and are fixed. The bearing group is limited by the graphite gasket 8 and the retaining ring 7 and abuts against the countersunk hole 10 of the straight support tube, so the rotating shaft 4 is limited in the support tube 12.

[0035] In reality, the fan blade 2 (mentioned below) will be subjected to a radial force in a possible fall. Generally, only the bearing is used. This single bearing will be subjected to a symmetrical torque stress as the fulcrum of the bearing and may be deformed, resulting in abnormal noise during the rotation of the fan. The pair of bearing groups added to the support tube 12 in this embodiment can provide support for the rotating shaft 4 to avoid the above-mentioned deformation and reduce the possibility of abnormal noise.

[0036] To further explain, a fan blade 2 is fixedly provided at one end of the rotating shaft 4, and an accommodating opening 3 is extended to one side in the middle of the fan blade 2, and a magnetic ring 1 is provided on the inner wall of the accommodating opening 3 by interference fit, and a winding core 15 and a PCB board 14 are fixedly sleeved on the outer wall of the support tube 12. The winding core 15 is used for winding electric wires, and an outermost pin 16 is fixedly provided inside the winding core 15. The outermost pin 16 extends to one side of the winding core 15 and is fixedly connected with the PCB board 14.

[0037] To further explain, the fan blade 2 is arranged coaxially with the rotating shaft 4, and a plurality of blades are arranged in a ring array on the top of the fan blade 2.

[0038] To further explain, the support tube 12 leads out electric wires and electric wire connectors which are electrically connected to the PCB board 14 and wound around the winding core 15 . The electric wire connectors mentioned here refer to the ends of the electric wires.

[0039] The technical features of the above-mentioned embodiments can be combined arbitrarily. 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 as within the scope of this specification. For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An integrated fan that resists falling impact and prevents bearing damage, characterized in that: A support tube extending upward is arranged at the center of the bracket, a rotating shaft is arranged coaxially inside the support tube, a rotating shaft sleeve is provided with a bearing group, the rotating shaft is rotatably connected to the support tube through the bearing group, and the rotating shaft sleeve is provided with a limiting elastic component, through which the rotating shaft can undergo axial elastic movement relative to the support tube.

2. The integrated fan capable of resisting drop impact and preventing bearing damage according to claim 1, characterized in that: The limiting elastic component comprises a spring piece, and the bearing group limiting sleeve is arranged on the rotating shaft. The spring piece abuts against the inner wall of the supporting tube and the bearing group respectively.

3. The integrated fan capable of resisting drop impact and bearing damage as claimed in claim 2, characterized in that: The bearing group includes a second bearing, and the limiting elastic component includes a snap ring, which is clamped on the side wall close to one of the ends of the rotating shaft. Countersunk holes are provided at both ends of the support tube, and the second bearings are provided in one of the countersunk holes. The two side walls of the second bearing are respectively abutted with a snap ring and a spring sheet, and the second bearing abuts against the inner bottom wall of the countersunk hole through the spring sheet.

4. The integrated fan capable of resisting drop impact and bearing damage according to claim 2, characterized in that: The bearing group also includes a first bearing, and the limiting elastic component also includes a graphite gasket, which is clamped on the side wall near one end of the rotating shaft. Countersunk holes are provided at both ends of the support tube, and the two sides of the first bearing are respectively abutted against the graphite gasket and the inner bottom wall of the countersunk hole.

5. The integrated fan capable of resisting drop impact and bearing damage according to claim 1, characterized in that: A fan blade is fixedly provided at one end of the rotating shaft, and an accommodating opening is extended to one side in the middle of the fan blade, and a magnetic ring is provided on the inner wall of the accommodating opening for interference fit, and a winding core and a PCB board are fixedly provided on the outer wall of the supporting tube. The winding core is used for winding electric wires, and an outermost pin is fixedly provided in the winding core, which extends to one side of the winding core and is fixedly connected with the PCB board.

6. The integrated fan capable of resisting drop impact and bearing damage according to claim 5, characterized in that: The fan blades are arranged coaxially with the rotating shaft, and a plurality of blades are arranged in a circular array on the top of the fan blades.

7. The integrated fan capable of resisting drop impact and preventing bearing damage according to claim 5, characterized in that: The support tube leads out a wire connector which is electrically connected to the PCB board and is wound on the winding core body.

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