CN2091375U

CN2091375U - Blade angle of attack adjustable electric fan

Info

Publication number: CN2091375U
Application number: CN 91213852
Authority: CN
Inventors: 严振华
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-06
Filing date: 1991-06-06
Publication date: 1991-12-25

Abstract

The utility model relates to a blade attack angle adjustable electric fan. When the utility model is used, the air quantity is adjusted by adjusting the attack angle of a blade. When the utility model is adopted, the outside of the rotary output component of a motor is sheathed with an adjusting ring which is provided with a bar-shaped chute; the bottom of a tab is sheathed on the column-shaped arm of the rotary output component, and the column-shaped arm extends out outwards; a rotating arm which is connected with the tab to form an integrative structure is inserted into the chute by the inserting column of the arm end; by rotating the adjusting ring, the inserting column is driven, the rotating arm is shifted, and the tab is driven to rotate a definite angle; a lug is arranged on the adjusting ring and is provided with a bridge type elastic mechanism, and a notch is arranged on the flange of the upper part of the rotary output component; so the attack angle of the blade can be adjusted and positioned, and the convenient use can be realized.

Description

Blade angle of attack adjustable electric fan

The utility model relates to the adjustable electric fan of a kind of blade incidence, comprises by motor-driven desk fan various forms of fans such as ceiling fan, ventilating fan and blower.

The variation of electric fan blade incidence can cause air quantity to change, the electric fan application that the domestic existing some kinds of angles of attack are adjustable patent, but most of complex structure is regulated bothersome.

The purpose of this utility model provides a kind of electric fan of the angle of attack of adjusting vane easily.

Electric fan of the present utility model comprises motor, three arc shaped blades and as the motor rotation output block of blade carrier, this output block is connected with bolt with arc shaped blade by the auricle that has bolt connecting hole.Of the present utility model being characterised in that: (referring to Fig. 1, Fig. 2) protruding three of the top of rotation output block (1) axially has the cylindricality arm (2) of the seam (21) that crosses one another more than two at it, three flanges (3) are arranged on the circumference between three cylindricality arms, respectively have at the bottom of each bar flange place one group adjacent, recess more than two (31), a base plate that is attached thereto (4) is arranged at the bottom (11) of rotation output block, in the rotation output block, the external diameter of bottom (15) is less than the external diameter of flange (3), in an Adjusting ring (5) the cover Zhi Xuanzhuan output block, bottom outside and being clipped between flange and the base plate, have three uniform bar shaped skewed slots (51) on its circumference, three uniform projections (52) are arranged at Adjusting ring top, in the bottom of each projection a penetration hole (53) is arranged respectively, constitute the bridge-type elastic mechanism, make Adjusting ring suitable like this, rely on projection chimericly can be positioned different positions during backward rotation with recessed, the bottom (61) of auricle (6) is socketed in cylindricality arm (2) and goes up also and can rotate around it, the internal diameter of auricle bottom (61) and cylindricality arm socket part is slightly less than the external diameter of cylindricality arm, between auricle bottom (61) and cylindricality arm (2), be lined with elastic washer (7), the two can be locked and loosening, can relatively rotate again, auricle bottom (61) has one to fuse with it, the end has a pivoted arm (64) that has the circular inserting column (63) of seam (62), the external diameter of circular inserting column is slightly larger than the width of bar shaped skewed slot (51), when circular inserting column inserts the bar shaped skewed slot, its end energy tensioner is in the bar shaped skewed slot, pivoted arm is not rocked, clockwise or counter-rotating is during several angle with Adjusting ring, because the displacement of skewed slot, make the cursor that slides in the inserting column skewed slot and drive auricle, make auricle around angle of cylindricality arm rotation, reach the purpose of the adjusting vane angle of attack, for ease of regulating, respectively be provided with the raised line (81) more than two on the surface of flange (3) and Adjusting ring (5), (82), so as not to when regulate hand skid.

Adopt the electric fan of said structure, can change the angle of attack of blade easily and reach the purpose of regulating air quantity.

Further specify embodiment of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is the Facad structure of embodiment's electric fan, (65) are bolt connecting holes among the figure, (9) be arc shaped blade (its bolt, nut that connects usefulness with auricle is not shown), (101) are elastic washers, and base plate (4) adopts with rotation output block bottom (11) and is threaded.

Fig. 3 is overlooking of Fig. 1 and A-A sectional view.

Fig. 2 is the another kind of pattern that base plate among the embodiment (41) is connected with rotation output block bottom (14), adopts the structure of tooth piece sliding gomphosis, partial sectional view shown in the figure, and wherein (102) are elastic washers.

Fig. 4 is the B-B sectional view of Fig. 2, and wherein (12) are the tooth pieces of rotation output block bottom (14), and (42) are the tooth pieces of base plate (41).

From Fig. 1, can see, clockwise or the counter-rotating with Adjusting ring, the skewed slot displacement, skewed slot with Adjusting ring when solid line position moves left to dotted line position, cursor (64) makes auricle rotate a certain angle around cylindricality arm (2), the angle of auricle becomes α from original β, thereby reaches the adjusting vane angle of attack and change the purpose of air quantity.

Arc shaped blade (9) is that arc shaped blade (9), auricle (6) and auricle bottom (61) are integrated with the another kind of mode that is connected of auricle (6), the bolt connecting hole cancellation on arc shaped blade and the auricle at this moment, and auricle plays the stiffening rib effect.

Claims

1, the electric fan that blade incidence is adjustable, comprise motor, three arc shaped blades and as the motor rotation output block of arc shaped blade carrier, three auricles are arranged on this output block, blade pass is crossed bolt and is connected with auricle, it is characterized in that: protruding three of the top of rotation output block (1) axially has the cylindricality arm (2) of the seam (21) that crosses one another more than two at it, three flanges (3) are arranged on the circumference between three cylindricality arms, the bottom of each bar flange place respectively have one group adjacent, recess more than two (31), a base plate (4) that connects is with it arranged at the bottom (11) of rotation output block, in the rotation output block, the external diameter of bottom (15) is less than the external diameter of flange (3), an Adjusting ring (5) be enclosed within the rotation output block in, bottom outside and being clipped between flange and the base plate, three uniform bar shaped skewed slots (51) are arranged on its circumference, three uniform projections (52) are arranged at Adjusting ring top, in each projection bottom a penetration hole (52) is arranged respectively, bottom (61) socket of auricle (6) is gone on the cylindricality arm (2), the internal diameter of auricle bottom (61) and cylindricality arm socket part is slightly less than the external diameter of cylindricality arm, between auricle bottom (61) and cylindricality arm (2), be lined with elastic washer (7), auricle bottom (61) has one to fuse with it, the end has a pivoted arm (64) that has the circular inserting column (63) of seam (62), and the external diameter of circular inserting column is slightly larger than the width of bar shaped skewed slot (51).Respectively be provided with the raised line (81) more than two on the surface of flange (3) and Adjusting ring (5), (82).

2, the as above adjustable electric fan of the described blade incidence of claim 1 is characterized in that base plate (41) and rotation output block bottom (11) are adopted to be threaded.

3, the as above adjustable electric fan of the described blade incidence of claim 1 is characterized in that base plate (41) and rotation output block (14) adopt tooth piece sliding gomphosis structure.

4, the as above adjustable electric fan of the described blade incidence of claim 1 is characterized in that arc shaped blade (9), auricle (6), auricle bottom (61) are integrated.