CN215333525U - Cooling fan blade fixing device - Google Patents
Cooling fan blade fixing device Download PDFInfo
- Publication number
- CN215333525U CN215333525U CN202121189219.2U CN202121189219U CN215333525U CN 215333525 U CN215333525 U CN 215333525U CN 202121189219 U CN202121189219 U CN 202121189219U CN 215333525 U CN215333525 U CN 215333525U
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- CN
- China
- Prior art keywords
- fan blade
- shaft
- coupling
- transition
- blade hub
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001816 cooling Methods 0.000 title claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 37
- 238000010168 coupling process Methods 0.000 claims abstract description 37
- 238000005859 coupling reaction Methods 0.000 claims abstract description 37
- 230000007704 transition Effects 0.000 claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a cooling fan blade fixing device which comprises a fan blade hub and fan blades arranged on the periphery of the fan blade hub, wherein a shaft coupler is fixed at the shaft end of a motor shaft, the shaft coupler is connected with one end of a transition coupling, and the other end of the transition coupling is connected with the fan blade hub. According to the technical scheme, the shaft can provide a reliable connecting and positioning part for the fan blade hub disc through the arrangement of the shaft coupler and the transition shaft coupler, a scheme of avoiding radial arrangement of the locking screws can be selected, namely, a foundation is provided for the pretightening force of the locking parts of the connecting screws or the locking nuts along the axial direction or the parallel axial direction, the fan blade hub disc and the fan blades operate stably and reliably, and the fracture phenomenon of the connecting part of the fan blades and the fan blade hub disc caused by the assembly structure is thoroughly eliminated.
Description
Technical Field
The utility model relates to a method for improving a fan blade fixing mode of a high-low temperature environment test box.
Background
In order to ensure the temperature uniformity in the environmental test chamber, four fans are arranged beside the heater in the test chamber, and the size and the shape of the fan blades determine the air volume of the supplied air.
At present, the common blade fixing mode of a small or micro fan is to fix the blade on a shaft sleeve, then the shaft sleeve is connected with a motor shaft of the fan, and a radial fastening bolt or screw is installed on the pipe wall of the shaft sleeve and screwed into a concave pit on the motor shaft to be fastened by the fastening bolt or screw, so that the relative rotation between the blade and the motor shaft is avoided. However, once the fixing mode is used for a fixed period, the relative rotation between the shaft sleeve and the motor shaft can be caused, so that the gap between the shaft sleeve and the motor shaft is enlarged. The clearance can make axle sleeve and motor shaft axiality relatively poor after increaseing, can lead to the blade to have the shake of different degrees in the operation process finally, aggravates the wearing and tearing of axle sleeve and motor shaft. The final result of the blade shaking is that a part or all of the blade begins to crack and fall from the root, and the normal use of the equipment is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cooling fan blade fixing device which ensures stable and reliable operation of a fan blade so as to prolong the service life of the fan blade.
In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a cooling blower fan blade fixing device, includes fan blade hub and separately puts at its peripheral fan blade, its characterized in that: the shaft end of the motor shaft is fixed with a coupler, the coupler is connected with one end of a transition coupler, and the other end of the transition coupler is connected with a fan blade hub.
According to the technical scheme, the shaft can provide a reliable connecting and positioning part for the fan blade hub disc through the arrangement of the shaft coupler and the transition shaft coupler, a scheme of avoiding radial arrangement of the locking screws can be selected, namely, a foundation is provided for the pretightening force of the locking parts of the connecting screws or the locking nuts along the axial direction or the parallel axial direction, the fan blade hub disc and the fan blades operate stably and reliably, and the fracture phenomenon of the connecting part of the fan blades and the fan blade hub disc caused by the assembly structure is thoroughly eliminated.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of a portion of the present invention;
FIG. 3 is a perspective view of the coupling;
fig. 4 is a schematic structural view of the transition coupling.
Detailed Description
As shown in fig. 1, a cooling fan blade fixing device includes a blade hub 10 and blades 11 respectively disposed at the periphery thereof, a shaft end of a motor shaft 20 is fixed with a coupling 30, the coupling 30 is connected with one end of a transition coupling 40, and the other end of the transition coupling 40 is connected with the blade hub 10.
The shaft end of the motor shaft 20 is provided with the coupling 30 and the transition coupling 40, so that successive transition in the axial direction can provide a very favorable connection foundation for connection contribution of the fan blade hub 10, and the possibility of abandoning radial locking is provided and the axial locking is realized by changing the axial pretightening force, so that non-stable operation states such as swinging, shaking and the like in the operation process of the fan blade hub 10 can be basically eliminated, and the service life of the fan is prolonged.
Preferably, the coupler (30 comprises a coupler shaft tube 31 sleeved on the motor shaft 20, one end of the coupler shaft tube 31 is provided with a coupler connecting disc 32, the transition coupler 40 is provided with a transition coupler connecting disc 42 connected with the coupler connecting disc 32 through a bolt 70 parallel to the axial direction of the motor, the transition coupler connecting disc 42 is positioned at one end of a transition coupler shaft tube 41, and the other end of the transition coupler shaft tube 41 is connected with the fan blade hub 10 through a screw 50 parallel to the axial direction of the motor.
The pipe end of the transition coupling shaft tube 41 far away from the transition coupling connecting disc 42 is provided with a top disc 43, the middle part of the outer end of the top disc 43 is provided with a positioning boss 431 which is matched and positioned with a positioning hole in the middle part of the fan blade hub 10, the top disc 43 and the fan blade hub 10 are connected by a connecting bolt 50 around the positioning boss 431, and the shaft core of the connecting bolt 50 is parallel to the motor shaft 20. The arrangement of the top plate 43 on the transition coupling shaft tube 41 provides a mounting position for connecting the fan hub 10, and the pre-tightening force between the two is consistent with the axial direction of the motor shaft 20, so that the axial position of the fan hub 10 can be stably and reliably limited.
Preferably, an annular convex ring 421 is arranged in the middle of the coupling connecting disc 42, and the annular convex ring 421 and the pipe hole at the end of the transition coupling connecting disc 42 form a socket type fit. Through the matching between the arranged annular convex ring 321 and the pipe hole at the end of the transition coupling connecting disc 42, the concentricity of the assembled parts is ensured, the adverse effect of the eccentric moment is eliminated, and the running stability of the fan blade hub 10 and the fan blade 11 is further improved.
The locknut 60 is in threaded connection with the shaft end section of the motor shaft 20 and is locked on the axial end face of the annular convex ring 321. The locknut 60 utilizes the lumen space of the coupler 30 to realize reliable locking of the coupler 30 and the motor shaft 20.
During assembly, the motor is fixed on the temperature box body, the motor shaft 20 enters the box body through the box body preformed hole, the motor is fixed on the rack of the box body, and the rack needs to have certain rigidity and moderate strength, so that the phenomenon that the fan motor does not shake after the fan is installed is avoided. Then, the coupler 30 is sleeved on the motor shaft 20 and is lightly pressed into the step of the motor shaft 20, the coupler 30 and the motor shaft 20 have good coaxiality, and the phenomenon that the coupler 30 swings when the motor shaft 20 rotates at the rotating speed of 960r/min is avoided; after the coupler 30 is positioned, the coupler 30 is fastened at the axial position by the locknut 60, so that the coupler 30 is ensured not to move at the axial position. Locknut 60 mates with the threads on the axial end section of motor shaft 20; the transition coupling connecting disc 42 and the coupling 30 are connected through a spigot formed by the positioning boss 431 to ensure the coaxiality of the two, the jointing surface of the transition coupling 40 and the fan blade hub 10 is an end surface vertical to the axial direction, and the rotation center of the fan blade 11 and the motor shaft 20 are fully jointed by utilizing the plane, so that the high-precision coaxiality is kept between the rotation center of the fan blade 11 and the motor shaft 20.
Claims (5)
1. The utility model provides a cooling blower fan blade fixing device, includes fan blade hub (10) and separately puts at its peripheral fan blade (11), its characterized in that: a shaft coupling (30) is fixed at the shaft end of the motor shaft (20), the shaft coupling (30) is connected with one end of the transition coupling (40), and the other end of the transition coupling (40) is connected with the fan blade hub (10).
2. The cooling fan blade fixing device according to claim 1, wherein: the coupling (30) is established shaft coupling central siphon (31) on motor shaft (20) including the cover, there is coupling connection pad (32) coupling shaft siphon's one end, has transition coupling connection pad (42) on transition coupling (40) and links to each other through being on a parallel with the axial bolt of motor with coupling connection pad (32), and transition coupling connection pad (42) are located the one end of transition coupling central siphon (41), and the other end and fan blade hub dish (10) of transition coupling central siphon (41) link to each other through being on a parallel with the axial screw of motor.
3. The cooling fan blade fixing device according to claim 1 or 2, wherein: the end, far away from the connecting disc (42) of the transition coupling, of the transition coupling shaft tube (41) is provided with a top disc (43), the middle of the outer end of the top disc (43) is provided with a positioning boss (431) which is matched and positioned with a positioning hole in the middle of the fan blade hub disc (10), the top disc (43) and the fan blade hub disc (10) are connected by screws (50) around the positioning boss (431), and the shaft core of each screw (50) is parallel to the motor shaft (20).
4. The cooling fan blade fixing device according to claim 1, wherein: an annular convex ring (321) is arranged in the middle of the coupling connecting disc (32), and the annular convex ring (321) and the pipe hole at the end where the transition coupling connecting disc (42) is located form a plug bush type fit.
5. The cooling fan blade fixing device according to claim 1, wherein: the locknut (60) and the shaft end section of the motor shaft (20) form threaded connection and are locked on the axial end face of the annular convex ring (321).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121189219.2U CN215333525U (en) | 2021-05-31 | 2021-05-31 | Cooling fan blade fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121189219.2U CN215333525U (en) | 2021-05-31 | 2021-05-31 | Cooling fan blade fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215333525U true CN215333525U (en) | 2021-12-28 |
Family
ID=79549309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121189219.2U Active CN215333525U (en) | 2021-05-31 | 2021-05-31 | Cooling fan blade fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215333525U (en) |
-
2021
- 2021-05-31 CN CN202121189219.2U patent/CN215333525U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |