CN220302359U - Double ball bearing fan structure - Google Patents
Double ball bearing fan structure Download PDFInfo
- Publication number
- CN220302359U CN220302359U CN202320592576.6U CN202320592576U CN220302359U CN 220302359 U CN220302359 U CN 220302359U CN 202320592576 U CN202320592576 U CN 202320592576U CN 220302359 U CN220302359 U CN 220302359U
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- Prior art keywords
- flexible sleeve
- ball bearing
- central shaft
- mandrel
- rotor
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- 238000004891 communication Methods 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to the technical field of fans, in particular to a double-ball bearing fan structure, which comprises an outer frame, a rotor, a stator and a bearing structure, wherein the outer frame is provided with a central shaft tube, the stator is arranged outside the central shaft tube, the rotor is rotationally arranged on the stator, the bearing structure comprises a flexible sleeve and two ball bearings, the flexible sleeve is of a hollow structure, the flexible sleeve is arranged in the central shaft tube, and the two ball bearings are arranged in the flexible sleeve. According to the utility model, the ball bearing is accommodated in the flexible sleeve, so that the flexible sleeve has enough softness, and is arranged in the inner hole of the central shaft tube which can adapt to the outer frame, and the influence on the assembly effect of the ball bearing caused by unstable inner diameter due to injection molding of the central shaft tube is avoided, so that the ball bearing can be installed, and in addition, shaking and displacement cannot occur during use.
Description
Technical Field
The utility model relates to the technical field of fans, in particular to a double ball bearing fan structure.
Background
The fan motor with the double ball bearing structure has the advantages that the upper bearing and the lower bearing need higher concentricity and verticality during operation, so that the correct operation of the fan motor can be ensured, because the operation of the fan is rotary motion, the bearing and the outer frame central shaft tube have the problem of left and right shaking due to the conditions of vibration, centrifugal force, eccentric inner diameter of the outer frame central shaft tube and the like, and the fan motor is abnormal in operation, such as rotation, swinging, abnormal noise and the like. This requires a reliable process to ensure that the bearings do not shift and wobble during operation of the fan.
The fan outer frame is injection moulding technology, and the size of the inner circle of the outer frame central shaft tube is determined by the mould precision and the forming condition, and the bearing needs extremely high precision for the assembly space of the precision part, and the problem is that: the injection molding process is characterized in that the inner circle of the central shaft tube of the outer frame has a draft angle to cause the lower part to be small and the upper part to be large, and the shrinkage factor of the plastic is added, so that the problem of overlarge or undersize inner circle easily occurs; when the fan is matched with the bearing, gaps are generated when the inner circle is too large, so that the fan can shake left and right in operation to generate abnormal sound; and the upper and lower parts are not concentric due to over-tightening, so that the operation of the fan is not smooth.
Disclosure of Invention
The utility model provides a double-ball bearing fan structure aiming at the problems in the prior art, which can ensure the stability of double-ball bearing assembly, namely, the ball bearings can not shift and shake when working after being assembled.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a double-ball bearing fan structure, which comprises an outer frame, a rotor, a stator and a bearing structure, wherein the outer frame is provided with a central shaft tube, the stator is arranged outside the central shaft tube, the rotor is rotatably arranged on the stator, the bearing structure comprises a flexible sleeve and two ball bearings, the flexible sleeve is of a hollow structure, the flexible sleeve is arranged in the central shaft tube, and the two ball bearings are arranged in the flexible sleeve.
Further, the top and the bottom of the flexible sleeve are respectively provided with a mounting hole, a communication hole is communicated between the two mounting holes, and the two ball bearings are assembled in one-to-one correspondence with the two mounting holes; the inner diameter of the mounting hole is larger than the inner diameter of the communication hole.
Further, the flexible sleeve is made of silica gel or rubber.
Further, one ends of the two mounting holes, which are opposite to each other, are respectively provided with a shielding part, and the shielding parts are used for preventing the ball bearings from being separated from the mounting holes.
Further, the rotor is provided with a mandrel, a spring is sleeved outside the mandrel, the mandrel penetrates through the two ball bearings, and the spring is located between the mandrel and the flexible sleeve.
Further, a buckle is arranged between the mandrel and the flexible sleeve.
Further, a connecting table is arranged between the mandrel and the rotor, and the width of the connecting table is larger than that of the mandrel; a reinforcing table is arranged between the connecting table and the rotor, and the width of the reinforcing table is larger than that of the mandrel.
The utility model has the beneficial effects that: according to the utility model, the ball bearing is accommodated in the flexible sleeve, so that the flexible sleeve has enough softness, and is arranged in the inner hole of the central shaft tube which can adapt to the outer frame, and the influence on the assembly effect of the ball bearing caused by unstable inner diameter due to injection molding of the central shaft tube is avoided, so that the ball bearing can be installed, and in addition, shaking and displacement cannot occur during use.
Drawings
FIG. 1 is a schematic diagram of the present utility model.
Fig. 2 is an exploded view of the present utility model.
Fig. 3 is a cross-sectional view of the present utility model.
Fig. 4 is a cross-sectional view of the bearing structure of the present utility model.
Reference numerals: 1-outer frame, 2-rotor, 3-stator, 4-bearing structure, 11-central shaft tube, 21-mandrel, 22-spring, 23-fastener, 24-connection table, 25-reinforcing table, 41-flexible sleeve, 42-ball bearing, 43-mounting hole, 44-communication hole, 45-shielding part.
Detailed Description
The utility model will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the utility model. The present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the dual ball bearing fan structure provided by the utility model comprises an outer frame 1, a rotor 2, a stator 3 and a bearing structure 4, wherein the outer frame 1 is provided with a central shaft 21 pipe 11, the stator 3 is installed outside the central shaft 21 pipe 11, the rotor 2 is rotatably arranged on the stator 3, the bearing structure 4 comprises a flexible sleeve 41 and two ball bearings 42, the flexible sleeve 41 is of a hollow structure, the flexible sleeve 41 is installed in the central shaft 21 pipe 11, and the two ball bearings 42 are installed in the flexible sleeve 41.
Namely, when the utility model is assembled, the assembly mode of the outer frame 1, the rotor 2 and the stator 3 is basically not different from the conventional means, the ball bearing 42 is assembled into the flexible sleeve 41 firstly, then the flexible sleeve 41 is installed on the central shaft 21 pipe 11, the central shaft 21 pipe 11 is mostly injection molded at present, the factors of small lower and large upper parts, plastic shrinkage rate and the like are added in the molding process, the problem that the inner hole of the central shaft 21 pipe 11 is excessively large or excessively small is caused by accommodation of the factors of the plastic shrinkage rate and the like, and at the moment, the flexible sleeve 41 can be deformed by the extrusion of the inner side wall of the central shaft 21 pipe 11 only by ensuring that the outer diameter of the flexible sleeve 41 is slightly larger than the inner diameter of the central shaft 21 pipe 11 due to the softness of the flexible sleeve 41, so that the flexible sleeve 41 is ensured to be stably assembled into the central shaft 21 pipe 11; since the ball bearing 42 is installed in the hollow flexible sleeve 41, no matter how the outer wall of the flexible sleeve 41 is extruded and deformed, the change of the space where the ball bearing 42 is located is not affected, so that the stability of the ball bearing 42 is ensured, and the ball bearing 42 is prevented from being incapable of being installed in the central shaft 21 pipe 11 or moving and shaking in the central shaft 21 pipe 11.
In this embodiment, the top and bottom of the flexible sleeve 41 are respectively provided with a mounting hole 43, a communication hole 44 is communicated between the two mounting holes 43, and the two ball bearings 42 are assembled in one-to-one correspondence with the two mounting holes 43; the inner diameter of the mounting hole 43 is larger than the inner diameter of the communication hole 44.
In actual use, the two mounting holes 43 are respectively provided with a shielding part 45 at the opposite ends, and the shielding parts 45 are used for preventing the ball bearings 42 from separating from the mounting holes 43. That is, after the flexible sleeve 41 is molded, the ball bearing 42 is inserted into the mounting hole 43 to be assembled, and the shielding portion 45 is deformed to be unseated when the ball bearing 42 is inserted, and is restored to be deformed after the ball bearing 42 is inserted, thereby securing the position of the ball bearing 42.
In this embodiment, the flexible sleeve 41 is made of silicone or rubber, which ensures that the flexible sleeve 41 has sufficient softness and also sufficient strength to ensure that the basic shape is unchanged.
In this embodiment, the rotor 2 is provided with a spindle 21, the spindle 21 is sleeved with a spring 22, the spindle 21 is arranged through two ball bearings 42, and the spring 22 is arranged between the spindle 21 and the flexible sleeve 41.
In this embodiment, a buckle 23 is disposed between the mandrel 21 and the flexible sleeve 41, so as to avoid the mandrel 21 from being separated from the flexible sleeve 41.
In this embodiment, a connection table 24 is disposed between the spindle 21 and the rotor 2, and the width of the connection table 24 is greater than the width of the spindle 21; a reinforcing table 25 is provided between the connecting table 24 and the rotor 2, the reinforcing table 25 having a width greater than that of the spindle 21. Namely, the utility model adopts a two-stage step structure to ensure the strength and stability of the mandrel 21, thereby ensuring that the mandrel 21 cannot be broken in the working process of the utility model so as to improve the quality.
The present utility model is not limited to the preferred embodiments, but is intended to be limited to the following description, and any modifications, equivalent changes and variations in light of the above-described embodiments will be apparent to those skilled in the art without departing from the scope of the present utility model.
Claims (7)
1. The utility model provides a two ball bearing fan structures, includes frame, rotor, stator and bearing structure, and the frame is equipped with the central shaft pipe, and the stator is installed outside the central shaft pipe, and the rotor rotates to set up in the stator, its characterized in that: the bearing structure comprises a flexible sleeve and two ball bearings, the flexible sleeve is of a hollow structure, the flexible sleeve is installed in the central shaft tube, and the two ball bearings are installed in the flexible sleeve.
2. The dual ball bearing fan structure according to claim 1, wherein: the top and the bottom of the flexible sleeve are respectively provided with a mounting hole, a communication hole is communicated between the two mounting holes, and the two ball bearings are assembled in one-to-one correspondence with the two mounting holes; the inner diameter of the mounting hole is larger than the inner diameter of the communication hole.
3. The dual ball bearing fan structure according to claim 1 or 2, wherein: the flexible sleeve is made of silica gel or rubber.
4. The dual ball bearing fan structure according to claim 2, wherein: one end of each of the two mounting holes, which is opposite to the other end, is respectively provided with a shielding part, and the shielding parts are used for preventing the ball bearings from separating from the mounting holes.
5. The dual ball bearing fan structure according to claim 1, wherein: the rotor is provided with a mandrel, a spring is sleeved outside the mandrel, the mandrel penetrates through the two ball bearings, and the spring is located between the mandrel and the flexible sleeve.
6. The dual ball bearing fan structure according to claim 5, wherein: a buckle is arranged between the mandrel and the flexible sleeve.
7. The dual ball bearing fan structure according to claim 5, wherein: a connecting table is arranged between the mandrel and the rotor, and the width of the connecting table is larger than that of the mandrel;
a reinforcing table is arranged between the connecting table and the rotor, and the width of the reinforcing table is larger than that of the mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320592576.6U CN220302359U (en) | 2023-03-23 | 2023-03-23 | Double ball bearing fan structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320592576.6U CN220302359U (en) | 2023-03-23 | 2023-03-23 | Double ball bearing fan structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220302359U true CN220302359U (en) | 2024-01-05 |
Family
ID=89350349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320592576.6U Active CN220302359U (en) | 2023-03-23 | 2023-03-23 | Double ball bearing fan structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220302359U (en) |
-
2023
- 2023-03-23 CN CN202320592576.6U patent/CN220302359U/en active Active
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| GR01 | Patent grant |