CN2405051Y - Rotor assembling means for motor of electric fan - Google Patents

Abstract

The utility model relates to an assembly device of a rotor of a fan motor, which comprises a circular cup-shaped blade housing and a circular cup-shaped inner shell which is tightly matched and sheathed in the blade housing. A fixed ring beside the blade housing is provided with at least a hook, the hook inwards extends from the side edge of the opening of the blade housing along radical direction and buckle the inner shell in the blade housing. The utility model can assure the tight matching of the blade housing and the inner shell, and the inner shell is not easy to fall from the blade housing.

Description

The rotor composite set of fan motor

The utility model is about a kind of rotor composite set, especially about a kind of rotor composite set of fan motor.

Along with the application of electronic component and intergrated circuit is more prevalent, also become an increasingly important problem for the radiating mode of electronic component and intergrated circuit.Wherein, using fan that the electronic component in the heating is dispelled the heat in the mode of forced convection, is very general a kind of radiating mode.

Figure 1A is a part of cross-sectional schematic.The rotor combining structure that shows a kind of known fan, Figure 1B then are its elevational schematic view.With reference to Figure 1A and 1B; known DC fan rotor combining structure 10 comprises a flabellum shell 11 and an inner casing 12; flabellum shell 11 common materials with easy-formation; make as plastics or resin material; 12 of inner casings are made with high-intensity metallic material usually; the softer tape of material that its function is established for the protection inner loop can not be out of shape because of assembling, and reduces the magnetic leakage phenomenon of tape.

The outer periphery of inner casing 12 is that the mode with close-fitting cooperates with the inner periphery of flabellum shell 11, and it can relatively not rotated, and then in inner casing 12 inner installings as elements such as rotating shaft and tapes, in the mode of magnetic induction whole flabellum composite structure is rotated according to a central shaft.

The shortcoming of this kind rotor combining structure for when assembling flabellum shell 11 with inner casing 12, needs with very big pressure inner casing 12 is pressed in the flabellum shell 11, so causes breaking of flabellum shell 11 easily, reduces the production accepted product percentage of flabellum composite structure.

For improving above-mentioned shortcoming, general most in the inboard of fan 2 shells, ring is established the rib of projection, required pressure when assembling inner casing to reduce.Fig. 2 is a part of cross-sectional schematic, show the another kind of known fan propeller composite structure that is provided with rib, it is in the inboard of flabellum shell 21, be equipped with most outstanding ribs 211, this rib 211 is less near the outstanding height of the opening of flabellum shell 21, and away from the opening of flabellum shell 21, the height that rib 211 is given prominence to is just many more more, inscribed circle up to the most inboard point of each rib 211 is connected into can form till the drive fit with the outside of inner casing 12.The benefit of this design for reducing assembling time institute's applied pressure, reduces the danger that shell breaks because of exerting pressure.Yet required power is less if pack into, and relatively, inner casing also can be easier to deviate from the flabellum shell.This is the shortcoming of this assembling mode.

For addressing the above problem, the purpose of this utility model makes flabellum shell and inner casing guarantee to realize drive fit for a kind of rotor composite set of fan motor is provided, and makes inner casing be difficult for coming off in the flabellum shell.

For reaching above-mentioned purpose, the utility model provides a kind of rotor composite set of fan motor, comprises: a flabellum shell is round cup shape; And an inner casing, being round cup shape, its drive fit is socketed on this flabellum enclosure, it is characterized in that:

This flabellum shell in opening side more retaining ring be provided with at least one grab, this grab radially extends toward inner from the opening side edge of this flabellum shell, and this inner casing is fastened in this flabellum enclosure.

The rotor composite set of described fan motor is characterized in that:

Can spacer ring in this flabellum shell inboard establish most shafts to rib, respectively the inscribed circle diameter of the most inboard point of this rib makes this flabellum shell and this inner casing drive fit less than the external diameter of this inner casing.

The rotor composite set of described fan motor is characterized in that:

In being formed with at least one hole that this inner casing is exposed on this flabellum shell in this flabellum shell.

The rotor composite set of described fan motor is characterized in that:

At least one recess is formed at the opening side of this inner casing, and the position of this recess makes this grab embed this recess to position that should grab.

Effect of the present utility model is: the rotor composite set of fan motor of the present utility model, and can make flabellum shell and inner casing guarantee to realize drive fit, make inner casing be difficult in the flabellum shell, coming off.

The rotor composite set of fan motor of the present utility model, the flabellum shell is equipped with at least one grab in opening side, its opening side edge from the flabellum shell a little radially extends toward inner, mat makes this inner casing when assembling, grab can be a little radially toward outside distortion, allow inner casing pass through smoothly, and arrive the precalculated position of flabellum enclosure at inner casing after, grab is promptly inwardly got back to original position, in the precalculated position of flabellum enclosure inner casing can't be withdrawed from fixing inner casing along the direction of central shaft in the flabellum shell.

The rotor composite set of fan motor of the present utility model is established a plurality of axial ribs in flabellum shell clear width ring, and the inscribed circle diameter of inboard point of each rib is slightly less than the external diameter of inner casing, and the flabellum shell can be combined with the inner casing close-fitting.So, can reduce the required pressure of assembling, reduce the danger that the flabellum shell breaks because of pressure is excessive.

Rotor composite set of the present utility model more comprises at least one hole, and it is formed on the flabellum shell, and inner casing can be exposed in the flabellum shell, uses the enhancement radiating effect.

Rotor composite set of the present utility model more comprises at least one recess, and it is formed at the opening side of inner casing, and the position of each recess corresponds to the position of each grab.Can more guarantee the locating effect of inner casing with respect to the flabellum shell by this, make motor when driving the fan rotation, can not reduce because of the frictional force of close-fitting between inner casing and flabellum shell, both produce relative rotation and cause it.

The drawing of accompanying drawing is described as follows:

Figure 1A is a part of cross-sectional schematic, shows a kind of rotor combining structure of known fan.

Figure 1B is an elevational schematic view, shows a kind of rotor combining structure of known fan.

Fig. 2 is a part of cross-sectional schematic, shows the another kind of known fan propeller composite structure that is provided with rib.

Fig. 3 is a part of cross-sectional schematic, shows the flabellum shell of the utility model first embodiment's rotor composite set.

Fig. 4 A is a part of cross-sectional schematic, shows first embodiment's of the present utility model rotor composite set.

Fig. 4 B is a part of cross-sectional schematic, shows the utility model first embodiment's rotor composite set.

Fig. 5 A is a part of cross-sectional schematic, the inner casing of the assembling of demonstration the utility model second embodiment's rotor composite set.

Fig. 5 B is a part of cross-sectional schematic, shows the utility model second embodiment's rotor composite set.

Below will cooperate correlative type, describe rotor composite set in detail according to the utility model preferred embodiment.

With reference to Fig. 3, the flabellum shell 31 of the rotor composite set of fan motor of the present utility model does not exist together with aforementioned known flabellum shell 21, be that flabellum shell 31 is provided with two grabs 312 in the inboard of periphery, each grab comprises an elongate portion 3121, and an engagement portion 3122.

Elongate portion 3,121 one ends be connected in flabellum shell 31 periphery inboard in the middle of partly, the opening side that the other end then extends to flabellum shell 31 to be connecting engagement portion 3122, and and the peripheral inboard of flabellum place shell 31 between a space is arranged.

The shape of engagement portion 3122 is to extend internally a little from the joint with elongate portion 3121, and its bearing of trend is parallel to the opening side plane of flabellum shell 31.After extending to a precalculated position, promptly with an angle towards stretching out away from the direction of flabellum shell 31 and forming an inclined-plane.The purpose of this kind shaped design will be in aftermentioned.

In addition, the bottom of flabellum shell 31 more is formed with a hole 313, and its purpose is also with aftermentioned.

Fig. 4 A is a part of cross-sectional schematic, and demonstration is according to situation in the assembling of the utility model first embodiment's rotor composite set.Wherein the inner casing in the known fan propeller composite structure of inner casing and Fig. 2 is identical, so represent with identical reference marks.With reference to Fig. 4 A, since the central point of flabellum shell 31 to the engagement portion 3122 beeline less than the external diameter of inner casing 12, so desire when opening side is fitted into flabellum shell 31 when inner casing 12, can touch the inclined-plane of engagement portion 3122 earlier, produce a radially outer component.Because the thinner thickness of elongate portion 3121 on flabellum shell 31 radial directions, be easy to bending, and a space is arranged with the inner periphery of flabellum shell 31, so inner casing 12 can be shown in Fig. 4 A, with the radial component between the inclined-plane of itself and engagement portion 3122 whole grab 312 is outwards pushed, to enter in the flabellum shell 31.

Fig. 4 B is a part of cross-sectional schematic, and demonstration is finished situation according to the assembling of the rotor composite set of the utility model first embodiment's fan motor.With reference to Fig. 4 B, after inner casing 12 arrived the precalculated position of flabellum shell 31 inside, grab 312 was promptly got back to original position.At this moment, engagement portion 3122 is to contact with the opening side of inner casing 12 with the plane perpendicular to inner casing 12 central shafts (that is central shaft of flabellum shell 31).If inner casing 12 is desired to be withdrawed from by its opening side from flabellum shell 31 inside, then can be subjected to stopping of engagement portion 3122, and its plane perpendicular to inner casing 12 central shafts is applied an axial force.Because this axial force can not radially outwards push grab 312,, reach fixedly inner casing 12 in the precalculated position of flabellum shell 31 inside, the function that inner casing 12 can't be withdrawed from along the direction of central shaft in flabellum shell 31 so engagement portion 3122 can not moved.

In addition because that flabellum shell 31 forms is porose 313, so inner casing 12 be fixed in flabellum shell 31 in after, still can expose from flabellum shell 31.The purpose of this design is that its radiating effect is better because the flabellum shell usually by being easy to integrated material, is made as plastics etc., and its radiating effect is relatively poor, and inner casing is made as metallic material then by the higher material of intensity.And in motor apparatus, stator pack is overlying among the rotor combination, and stator can produce heat behind energization excitation, so, if inner casing is exposed,, will have than better heat radiating effect then for the stator of its inside.

Fig. 5 A is a part of cross-sectional schematic, shows the inner casing 52 according to the utility model second embodiment's rotor composite set 50.With reference to Fig. 5 A, not existing together of itself and aforesaid known inner casing 12 is more to be formed with on the opening side two recesses 521.

Fig. 5 B is a part of cross-sectional schematic, and demonstration is finished situation according to the assembling of the utility model second embodiment's rotor composite set 50.Wherein the flabellum shell is identical with flabellum shell 31 among aforementioned first embodiment, so represent with identical reference marks.With reference to Fig. 5 B, the recess 521 on the inner casing 52 is the positions that correspond to the engagement portion 3122 of grab 312 on the flabellum shell 31, and engagement portion 3122 can be embedded among the recess 521.So, when rotor combining structure 50 when rotated, because engagement portion 3122 engages with recess 521, make between flabellum shell 31 and the inner casing 52 except that frictional force originally, more increased the tangent direction active force of engagement portion 3122, so can more promote the locating effect between engagement portion 3122 and the recess 21 with recess 521.

In addition to the foregoing, the utility model still can embodied in other, for example via modification, can make the opening side of the elongate portion 3121 of grab 312 from flabellum shell 31, but not the middle of its inner circumference partly begins extension, and reaches identical functions and do not violate spirit of the present utility model.In addition, the hole 313 of aforementioned flabellum shell 31 also can be positioned at its periphery reaching identical functions, and need not be positioned at the bottom.

Claims (4)

1, a kind of rotor composite set of fan motor comprises: a flabellum shell is round cup shape; And an inner casing, being round cup shape, its drive fit is socketed on this flabellum enclosure, it is characterized in that:

This flabellum shell in opening side more retaining ring be provided with at least one grab, this grab radially extends toward inner from the opening side edge of this flabellum shell, and this inner casing is fastened in this flabellum enclosure.

2, the rotor composite set of fan motor as claimed in claim 1 is characterized in that:

In this flabellum shell clear width ring establish most shafts to rib, respectively the inscribed circle diameter of the most inboard point of this rib makes this flabellum shell and this inner casing drive fit less than the external diameter of this inner casing.

3, the rotor composite set of fan motor as claimed in claim 1 is characterized in that:

In be formed with at least one hole that this inner casing is exposed on this flabellum shell in this flabellum shell.

4, the rotor composite set of fan motor as claimed in claim 1 is characterized in that:

At least one recess is formed at the opening side of this inner casing, and the position of this recess makes this grab embed this recess to position that should grab.

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