CN201265560Y - Domestic ventilating fan - Google Patents
Domestic ventilating fan Download PDFInfo
- Publication number
- CN201265560Y CN201265560Y CN 200820047815 CN200820047815U CN201265560Y CN 201265560 Y CN201265560 Y CN 201265560Y CN 200820047815 CN200820047815 CN 200820047815 CN 200820047815 U CN200820047815 U CN 200820047815U CN 201265560 Y CN201265560 Y CN 201265560Y
- Authority
- CN
- China
- Prior art keywords
- rotor
- ventilation fan
- impeller
- motor
- rotor shaft
- Prior art date
- 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.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A family-use ventilator comprises an impeller and an electric motor. The electric motor comprises a stator, a rotor and a seat. The family-use ventilator is characterized in that the rotating center of the impeller is connected with a thread at the shaft extension end of the rotor, and the rotation of the rotor is impeded by the seat when the rotor shifts towards a non-transmission direction. The family-use ventilator also comprises a return structure eliminating the reversal shifting. The operation of dissembling the impeller is comparatively convenient, the structure is simplified and the cost is reduced.
Description
Technical field
The utility model relates to a kind of household ventilation fan, in International Patent Classification (IPC), can belong to F04D25/00.
Background technique
After most of household ventilation fans (the especially exposed ventilation fan of impeller) use a period of time, need unload impeller usually and clean.Modular design for this reason (can referring to Fig. 1) is:
---rotor shaft extension end forms outside thread, an axial plane and an axial seam or a back-up ring;
---impeller is inserted in rotor shaft extension end with its rotating center through hole, and rotary stopper is in the axial plane of rotor shaft extension end, and axial limiting is in the axial seam or the back-up ring of rotor shaft extension end;
---a protecgulum screws in rotor shaft extension end outside thread with the internal thread of rotating center recess, and impeller is pressed in described axial seam or back-up ring; Protecgulum has covered the through hole of impeller, and effect attractive in appearance is also arranged.
Above structure can be referring to Fig. 1 and the relevant explanation of embodiment part.This design except that structure still than the complexity, dismounting needs two handlings during impeller: left hand is held impeller and is stoped its rotation to block rotor shaft, the right hand screws out protecgulum; Pull out impeller then, thus cumbersome.Especially when if ventilation fan is installed on than higher position, two handlings are just more difficult.
Relational term can be with reference to GB/T 2900.25-94 " electrotechnical terminology electric rotating machine "
The model utility content
Technical problem to be solved in the utility model is, proposes a kind of household ventilation fan, and it is than traditional design, and the operation of dismounting impeller is more convenient, and designs simplification and reducing cost.
The technological scheme of the utility model technical solution problem is, a kind of household ventilation fan comprises impeller and motor, and motor comprises stator, rotor and support; It is characterized in that the rotating center of described impeller is threaded with rotor shaft extension end, rotor rotates when non-transmision end direction play and is hampered by support, also comprises the resetting structure of eliminating this reverse play.
Because this design, when the dismounting impeller, press to the motor non-transmision end with the handgrip impeller, promptly make rotor to non-transmision end direction play, this moment is rotary blade simultaneously, screw thread breaks away from rotor shaft extension end under the situation of support even it is hampered by at rotor, thereby need not two handlings, and impeller is directly to be screwed to rotor shaft extension end, can save parts or structures such as the seam of protecgulum, the processing of rotor shaft extension end axial plane and axial limiting that conventional art is used for fastening impeller or back-up ring, thereby save cost.
Further one of design is used for inner rotor motor, and its end cap is fixed an axial pin, and rotor shaft is fixed a pin radially, and described rotor is when non-transmision end direction play, and described axial pin contacts radially pin, thereby reaches rotation and be obstructed.This dismounting impeller rotation is obstructed simple in structure and practical, and preferred design is in front cover.
Further two of design also are used for inner rotor motor, and to meet part mutually with the rotor shaft non-transmision end be concavo-convex cooperation to end cap thereafter.This design is also fairly simple and practical, but more compact structure.
Further three of design be described rotor when non-transmision end direction play, rotor iron core with respect to stator iron core to the non-transmision end axis of orientation to dislocation.Theoretical and experiment shows, after the stator energising, the rotor of dislocation is produced axial magnetic pull it is resetted, thereby releasing is that the utility model does not increase cost and designs the most cleverly to the dynamic resistance of its rotation.This dislocation optimum design is guaranteed to have enough axial magnetic pulls to reset, and is avoided excessive starting current greater than 2mm with less than 40% of core length.
For aforementioned inner rotor motor, have under the situation of rear end cover, its further design be that described resetting-mechanism is designed to rear end cover and rotor shaft non-transmision end to meet part mutually be that a described rotor contacts compressed elastomer when non-transmision end direction play.This elastomer can be spring part or the rubber parts that an end is fixed in the cylindrical or turriform of rear end cover.
For above-mentioned design further be designed for the axial flow ventilation fan, it is exported along the reverse air-flow of described rotor shaft extension end.This air-flow produces the reset mode that is used to keep rotor with its direction opposite effect power dexterously, in order to avoid the harmful effect of dynamic resistance mechanism.
For the further design of above-mentioned design be screw thread that the rotating center of described impeller is threadedly connected to rotor shaft extension end be right-handed thread and motor for being rotated counterclockwise, perhaps for the left-handed thread motor for turning clockwise.This cooperation makes the driving force that impeller is rotated that the impeller spiral is tightened, and significant anti-loosing effect is arranged.
The technical solution of the utility model and effect will be further described in embodiment in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is the relevant structural representation of conventional domestic ventilation fan;
Fig. 2 is the relevant structural representation of the utility model the 1st embodiment's household ventilation fan operating condition;
Fig. 3 is the relevant structural representation of the utility model the 1st embodiment's household ventilation fan disassembly status;
Fig. 4 is the relevant structural representation of the utility model the 2nd embodiment's household ventilation fan operating condition;
Fig. 5 is the relevant structural representation of the utility model the 2nd embodiment's household ventilation fan disassembly status.
Embodiment
The utility model embodiment household ventilation fan is to improve to form on the basis of conventional domestic ventilation fan.
Be illustrated in figure 1 as a traditional axial flow household ventilation fan, its structure mainly comprises:
---impeller 1 and motor 2;
---motor 2 comprises stator 3, rotor 4, front housing 5 and back cabinet 6; Front housing 5 is fixed with fore bearing 7, and back cabinet 6 is fixed with rear bearing 8, and this bearing is an oil-impregnated bearing;
---stator 3 comprises stator iron core 9 and winding 10; The cylindrical of stator iron core 9 is inserted in front housing 5 and back cabinet 6 backs clamp with bolt; The bolt clamping element is fixed in ventilation fan mounting bracket (not shown) simultaneously;
---rotor 4 comprises rotor iron core 11 and rotor shaft 12, rotor shaft 12 is supported on fore bearing 7 and rear bearing 8, its front end is inserted in the front limit pipe 13 of suitable length between fore bearing 7 and rotor iron core 11, be inserted in the back position-limiting tube 14 of suitable length between rear bearing 8 and rotor iron core 11; The axial float of front limit pipe 13 and 14 pairs of rotors of back position-limiting tube is spacing, makes rotor iron core 7 axially align stator iron core 5;
---the shaft extension end 15 of rotor shaft 12 forms dextrorotation outside thread 16 and axial plane 17, and blocks within it with axial back-up ring 18;
---impeller 1 rotating center through hole is inserted in rotor shaft extension end 15, rotary stopper in its axial plane 17 and axial limiting in axial back-up ring 18;
---the rotating center recess of protecgulum 19 has internal thread, and cover is threaded onto the outside thread 16 of rotor shaft extension end 15, and impeller 1 is pressed in axial back-up ring 18;
After the energising, rotor shaft 12 is rotated counterclockwise, the axial flow that drives impeller 1 produces backward.
The utility model the 1st embodiment's household ventilation fan such as Fig. 2 and shown in Figure 3, its improvement of (the parts meaning that all marks are identical with Fig. 1 among Fig. 2, Fig. 3 is identical) on the basis of traditional axial flow household ventilation fan shown in Figure 1 comprising:
---the shaft extension end 15 ' of rotor shaft 12 ' changes the dextrorotation outside thread 16 ' of full circle into, promptly cancels former axial plane 17, and former axial back-up ring 18 is also cancelled;
---impeller 1 ' changes the structure of former protecgulum 19 and impeller 1 unification into, promptly cancels former protecgulum 19, and the rotating center recess that changes impeller 1 ' into has internal thread, and directly cover is threaded onto the outside thread 16 ' of rotor shaft extension end 15 ', and is tight until lemon;
---the end of the non-transmision end of rotor shaft 12 ' mills out one and traverses and the cross section is the groove 20 of V-arrangement along the shaft diameter direction;
---back cabinet 6 ' is that its end part in face of the non-transmision end of rotor shaft 12 ' is shaped to suitable projection 21 of being entangled by described v-depression 20 with respect to the change of former back cabinet 6;
---back position-limiting tube 14 ' shortens 3mm than former back position-limiting tube 14.When iron core was longer, this shortening can also be some more again.
Ventilation fan after improving like this, when dismounting impeller 1 ', press to the non-transmision end of motor 2 ' with handgrip impeller 1 ', its rotor 4 ' is to non-transmision end direction play, the groove 20 of the end of the non-transmision end of rotor shaft 12 ' entangles the projection 21 of back cabinet 6 ', counter-rotating this moment impeller 1 ' can unload its back-out, and forward rotation then can be loaded onto again.As seen from Figure 3, when loading and unloading impeller 1 ', rotor 4 ' is to the about 3mm of non-transmision end direction play, the iron core of rotor 4 ' and stator iron core 9 these dislocation are promptly forming the axial magnetic pull that tightens up the principle generation based on the magnetic line of force between two iron cores after the energising, it is resetted until alignment again, described groove 20 breaks away from simultaneously with projection 21 and removes rotation condition, and impeller 1 ' rotates under it drives.Described groove 20 also can change some circular holes that match and cylinder uniform on axis one concentric circle into projection 21.
The utility model the 2nd embodiment's household ventilation fan such as Fig. 4 and shown in Figure 5, its on the basis of traditional axial flow household ventilation fan shown in Figure 1 (the parts meaning that all marks are identical with Fig. 1 among Fig. 4, Fig. 5 is identical) improved and comprised:
---rotor shaft 12 " shaft extension end 15 " change the dextrorotation outside thread 16 of full circle into ", promptly cancel former axial plane 17, former axial back-up ring 18 is also cancelled;
---impeller 1 ' changes the structure of former protecgulum 19 and impeller 1 unification into, promptly cancels former protecgulum 19, and the rotating center recess that changes impeller 1 ' into has internal thread, and directly cover is threaded onto rotor shaft extension end 15 " outside thread 16 ", tight until lemon;
---front housing 5 " with respect to the change of former front housing 5, be that it radially stretches out a pin 22 before the side direction in bearing;
---rotor shaft 12 " the shaft extension end in the installation position of impeller 1 ' and the position between the front housing 5 ', cross a pin 23 along diametric(al); Pin 22 is a rotor 4 with the Design of length of pin 23 " when non-transmision end direction play, collide;
---back cabinet 6 " with respect to the change of former back cabinet 6, be that it is in face of rotor shaft 12 " the end part of non-transmision end fix a cylindrical or turriform spring 24, spring length initial value 6mm is 3mm after the maximum compression;
---back position-limiting tube 14 ' shortens 8mm than former back position-limiting tube 14.
Household ventilation fan after improving like this, when dismounting impeller 1 ', press to motor 2 with handgrip impeller 1 ' " non-transmision end; its rotor 4 " to non-transmision end direction play, the end of the non-transmision end of rotor shaft 12 ' contacts also and then pressure spring 24,22 rotations of pin 23 contact pins are obstructed, and counter-rotating this moment impeller 1 ' can unload its back-out, and forward rotation then can be loaded onto again.As seen from Figure 4, when loading and unloading impeller 1 ', rotor 4 " to the about 5mm of non-transmision end direction play; rotor 4 " iron core and stator iron core 9 should dislocation receive the axial magnetic pull that principle produces promptly between two iron cores, forming after the energising based on the magnetic line of force, add the reposition force of spring 24, it is resetted until alignment again, and pin 23 disengages simultaneously with pin 22 and removes rotation condition, and impeller 1 ' is driven down rotation.
This embodiment is owing to increase the effect of spring, and it is more reliable than the 1st embodiment to reset, but axial float is also big.Spring 24 also can be replaced by sphere, taper shape or the Elastic Cylindrical body that the similar materials such as oil resistant rubber, nylon and polyurethane of suitable Young's modulus are made; This moment, the size of axial float can suitably shorten.
In addition, pin 23 also can design at back cabinet 6 with the pin 22 rotation relations of being obstructed " the inboard; be it in bearing radially a side pin inwardly (preceding) stretch out, pin 23 crosses rotor shaft 12 " the position be back cabinet 6 " the inboard, promptly between rear bearing 8 and the rotor iron core 11.This structure is compact, but be not as easy to use as the former.Can also be at casing 6 " go out an axial raised flange to replace pin 22, perhaps on axle non-circular back-up ring of card to replace pin 23; Be manufacturability structure preferably.
In addition to the implementation, the utility model can also have following embodiment:
---the support of the utility model embodiment motor is that two formulas of front and back casing with drawing and forming constitute, but also can be two formulas or the three-member type of prior art casting back machining moulding;
---the utility model embodiment impeller is the outside thread that is threaded onto rotor shaft with inner screw sheath, but when the diameter of axle is enough big, also can form interior threaded hole in the end of axle, impeller rotating center recess can be designed to a bolt that protrudes, in order to be screwed into described interior threaded hole;
---the utility model embodiment makes impeller produce backward axial flow for motor is rotated counterclockwise, also can design motor and turn clockwise, and makes the turning round in the opposite direction of fin of impeller simultaneously, and the air-flow that is produced can be similarly axially backward; The connecting thread of impeller and shaft extension needs the corresponding left-handed thread that changes at this moment.
---the utility model embodiment motor adopts oil-containing sliding bearing, can certainly use ball bearing, and it is the structure of transition fit with bearing inner race or bearing outer ring and bearing support but need design, so that implement axial float function of the present utility model.
---the utility model embodiment is an inner rotor motor, also can design similarly in outer rotor motor; The rotor of outer rotor motor can be moving axis or dead axle, as long as carry out respective design according to outer rotor motor prior art structural feature and with reference to the structural feature that the foregoing description relates to the utility model main points, also can reach similar effect.
---the motor majority of traditional ventilation fan and the utility model embodiment ventilation fan is a squirrel-cage asynchronous motor, can certainly be permanent-magnet synchronous electric motor and direct current motor etc.For squirrel cage motor, its rotor has the skewed slot of several angle usually.By analyzing or experiment, the angle that suitably designs this skewed slot reaches and the corresponding true dip direction of sense of rotation, can further increase the axial magnetic pull of eliminating the reverse play of rotor.
Claims (9)
1, a kind of household ventilation fan comprises impeller and motor, and motor comprises stator, rotor and support; It is characterized in that the rotating center of described impeller is threaded with rotor shaft extension end, rotor rotates when non-transmision end direction play and is hampered by support, also comprises the resetting structure of eliminating this reverse play.
2, according to the described household ventilation fan of claim 1, it is characterized in that: described motor is an inner rotor motor, comprises end cap, end cap is fixed an axial pin, rotor shaft is fixed a pin radially, and described rotor is when non-transmision end direction play, and described axial pin contacts radially pin.
3, according to the described household ventilation fan of claim 2, it is characterized in that: described end cap is a front cover.
4, according to the described ventilation fan of claim 1, it is characterized in that: described motor is an inner rotor motor, comprises rear end cover, and it is concavo-convex cooperation that rear end cover is met part mutually with the rotor shaft non-transmision end.
5, according to the described household ventilation fan of claim 1, it is characterized in that: described rotor when non-transmision end direction play, rotor iron core with respect to stator iron core to the non-transmision end axis of orientation to dislocation.
6, according to the described household ventilation fan of claim 5, it is characterized in that: described dislocation is greater than 2mm with less than 40% of core length;
7, according to the described household ventilation fan of claim 3, it is characterized in that: comprise rear end cover, itself and rotor shaft non-transmision end to meet part mutually be a described rotor when non-transmision end direction play contact compressed elastomer.
8, according to claim 1 each described household ventilation fan to the claim 7, it is characterized in that: described impeller is the axial-flow blower of output along the reverse air-flow of described rotor shaft extension end.
9, according to claim 1 each described household ventilation fan to the claim 7, it is characterized in that: the screw thread that the rotating center of described impeller is threadedly connected to rotor shaft extension end be right-handed thread and motor for being rotated counterclockwise, perhaps for the left-handed thread motor for turning clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820047815 CN201265560Y (en) | 2008-05-14 | 2008-05-14 | Domestic ventilating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820047815 CN201265560Y (en) | 2008-05-14 | 2008-05-14 | Domestic ventilating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201265560Y true CN201265560Y (en) | 2009-07-01 |
Family
ID=40831928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820047815 Expired - Lifetime CN201265560Y (en) | 2008-05-14 | 2008-05-14 | Domestic ventilating fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201265560Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270764B (en) * | 2008-04-30 | 2012-04-25 | 江门市金羚排气扇制造有限公司 | Ventilation fan |
| CN102454620A (en) * | 2010-10-22 | 2012-05-16 | 日本电产株式会社 | Air supply fan |
-
2008
- 2008-05-14 CN CN 200820047815 patent/CN201265560Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270764B (en) * | 2008-04-30 | 2012-04-25 | 江门市金羚排气扇制造有限公司 | Ventilation fan |
| CN102454620A (en) * | 2010-10-22 | 2012-05-16 | 日本电产株式会社 | Air supply fan |
| CN102454620B (en) * | 2010-10-22 | 2015-07-15 | 日本电产株式会社 | Air supply fan |
| US9109607B2 (en) | 2010-10-22 | 2015-08-18 | Nidec Corporation | Blower fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090701 Effective date of abandoning: 20080514 |