CN2773354Y

CN2773354Y - Miniature shaded-pole discharge pump

Info

Publication number: CN2773354Y
Application number: CN 200520070010
Authority: CN
Inventors: 于国强
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-22
Filing date: 2005-03-22
Publication date: 2006-04-19
Anticipated expiration: 2015-03-22

Abstract

The utility model relates to a minisize shaded pole type water-drainage pump which relates to an infusion pump comprising a winding assembly, a stator core, a motor casing body, a pump casing and a shaft core component, wherein the shaft core component uses a motor shaft to integrate a permanent magnet rotor, a shaft coupler, a bearing seat and an impeller. The middle part of the cylindrical shaft coupler is provided with a convex ring; a fan-shaped lug boss integrated with the convex ring is arranged outside a circular pipe of one end of the shaft coupler; the end surface of an inner bore of the shaft coupler is provided with a pit of which the diameter is bigger than the diameter of the inner bore; the end surface of the other end of the shaft coupler is formed by that a plurality of lug bosses are uniformly surrounded at intervals; the impeller is composed of a blade, a base, a shaft bore and a shaft pipe extending outwards from the shaft bore; an impeller base on the shaft pipe is provided with a pit ring divided by a plurality of ribs; the shaft pipe is composed of a plurality of elastic chips uniformly separated, and top ends of the elastic chips are provided with bulges; the shaft pipe of the impeller is inserted in the inner bore of the shaft coupler; the pit of the impeller base is fitted and connected with the lug boss of the shaft coupler; the bulges of the elastic chips are arranged in the pit of the inner bore of the shaft coupler; the bearing seat is also sheathed between the impeller and the convex ring of the shaft coupler. Because of the self-locking structure of the impeller and the shaft coupler, no matter how the utility model rotates, and how long the running time is, the impeller can not fall. The minisize shaded pole type water-drainage pump has compact structure, simple manufacturing process, low cost, little noise and favorable design reliability. The minisize shaded pole type water-drainage pump can be applied to domestic appliances such.

Description

Mini-sized shaded pole type water-drainage pump

Technical field

The utility model relates to a kind of infusion pump, particularly a kind of cover pole type micro pump that is applied on the household electric appliance such as washing machine, dishwasher.

Technical background

Chinese patent CN9232526 discloses " a kind of magneto formula draining pump ", comprise the coiling assembly, stator iron core, support, pump case, p-m rotor, bearing, several parts of impeller are formed, be equipped with axle sleeve piece and briquetting in the impeller endoporus, during installation, the axle sleeve piece is rigid to be pressed into or to heat and rely on heat expansion to be pressed in the impeller endoporus, axle sleeve piece external diameter is provided with the O RunddichtringO, after long-time the use, the axle sleeve piece is heating or wearing and tearing easily, caulking gum spare is also easy to wear, cause impeller and axle be connected can't be tight, impeller easily comes off, and causes the long-time stall of motor to lose effect even burn out draining pump.Bearing and the built-in oil sealing of bearing bracket abutting end reduce pump noise, and bearing outside diameter is provided with the O RunddichtringO, except that anti-sealing enters the p-m rotor chamber, also be used to adjust the coaxality of bearings at both ends, add man-hour precision be difficult to control, the processing technology complexity, concentricity can't guarantee.

Summary of the invention

The utility model is just in order to overcome above-mentioned deficiency, a kind of sized shaded pole type water-drainage pump is provided, its coupling and impeller can produce self-locking action after motor shaft is packed into, impeller can not come off, the design is simple in structure, noise is low, low cost of manufacture, main intention is to design the tight device of stinging nested against one another on coupling and impeller, specifically implement like this: mini-sized shaded pole type water-drainage pump, comprise the coiling assembly, stator iron core, electric machine casing, pump case and axle center assembly, the axle center assembly by motor shaft with p-m rotor, coupling, bearing support, impeller sets is integral, it is characterized in that cylindrical shape coupling middle part is equipped with a protruding circle, the pipe of coupling one end has a fan-shaped boss that fuses with protruding circle outward, this end of coupling endoporus is provided with a pit greater than diameter of bore, and the end face of the coupling the other end is surrounded by several at interval uniform boss; Impeller constitutes by blade, base, axis hole and by the central siphon of axis hole extension, is equipped with the pit circle of being separated by some muscle on the impeller base at central siphon place, central siphon by some block gaps evenly, the top spring sheet that has a projection forms; The central siphon of impeller inserts in the coupling endoporus, and the boss of impeller base pit and coupling coincide and connects, and spring sheet top projection falls within the pit of coupling endoporus, also is set with bearing support between the protruding circle of impeller and coupling.When the axle center assembly is installed, earlier with bearing sleeve on coupling, again the impeller central siphon is inserted in the coupling endoporus, then motor shaft is inserted in the impeller axis hole by the coupling endoporus, because of the spring sheet of impeller central siphon is strutted, its top projection is close on the pit inwall of offering in the coupling endoporus, because the coupling diameter of bore is less than pit diameter, spring sheet top projection just catches on pit makes impeller and coupling produce self-locking, rotation in any case, and impeller can not come off.

The magnetic post of p-m rotor is coated with a plastic layer and extension has a plastic cylinder in the assembly of the utility model axle center, and described plastic cylinder inwall is provided with a block, and this block rotates pairing with the fan-shaped boss that is sleeved on the coupling in the plastic cylinder.After the draining pump energising, p-m rotor turns round on motor shaft, drives coupling, wheel rotation.

In order to reduce the wearing and tearing between coupling and bearing support, be equipped with metal insert in the endoporus of the utility model bearing support.

Be equipped with the protruding circle concentric on the bearing support of the utility model impeller face with axis hole, protruding circle inboard is provided with inwardly protruded muscle, place rubber washer in the pit that forms between protruding circle and axis hole, this rubber washer endoporus is slightly less than the coupling external diameter, rubber washer is compressed by a plastic spacer, and the external diameter of plastic spacer is greater than the protruding circle of bearing support, by pressure plastic spacer is pressed into and compresses rubber washer after being blocked by convex tendon, slow down vibration, reduce noise.

Also be provided with an annular boss concentric on the bearing support of the utility model p-m rotor face with inner hole of bearing seat, pit concentric on described annular boss and the electric machine casing docks setting-in, the outside of bearing support is fixed by the electric machine casing and the pump housing, this concentric structure can be guaranteed the coaxality of axial portions, finishes concentric running.

The block both sides of the utility model p-m rotor respectively are equipped with a rubber column, and after coupling and motor shaft were packed rotor into, the fan-shaped boss of coupling formed with the p-m rotor block and intersects, when electric motor starting rotates, all there is rubber column at interval between boss and block, avoids directly interlock to bump against, reduce noise.

The utility model is by the self-locking structure of impeller and coupling, rotate in any case, working time how long, impeller all can not come off, this compact equipment, and processing technology is simple, cost is low, noise is few, and designed reliability is good, is applied to have the irreplaceable advantage of prior art on the household electric appliance such as washing machine, dishwasher.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is an axle center of the present utility model assembly structural representation.

Fig. 3 is A-A figure.

Embodiment

Mini-sized shaded pole type water-drainage pump, comprise coiling assembly (11), stator iron core (12), electric machine casing (6), pump case (7) and axle center assembly, the axle center assembly is formed one by motor shaft (1) with p-m rotor (2), coupling (4), bearing support (5), impeller (10).Cylindrical shape coupling (4) middle part is equipped with a protruding circle (41), the pipe of coupling (4) one ends has a fan-shaped boss (42) that fuses with protruding circle (41) outward, this end of coupling (4) endoporus is provided with a pit greater than diameter of bore (43), and the end face of coupling (4) the other end is surrounded by several at interval uniform boss (44); Impeller (10) is made of blade (101), base (102), axis hole (103) and central siphon (104) by the axis hole extension, be equipped with the pit circle of being separated by some muscle (105) on the impeller base (102) at central siphon place (104), central siphon (104) is made up of the spring sheet that some block gaps are even, the top has projection (106); The magnetic post of p-m rotor (2) is coated with a plastic layer (3) and extension has a plastic cylinder (31), and described plastic cylinder (31) inwall is provided with a block (32); Impeller central siphon (104) inserts in coupling (4) endoporus, and impeller base pit (105) connects with the boss (44) of coupling is identical, and spring sheet projection (106) falls within the pit (43) of coupling endoporus; Also be set with bearing support (5) between impeller (10) and the protruding circle of coupling (4) (41), be equipped with metal insert (51) in the endoporus of bearing support, bearing support (5) outside is fixed by electric machine casing (6) and pump case (7), be equipped with the protruding circle (52) concentric on the impeller face bearing support (5) with axis hole, protruding circle (52) inboard is provided with inwardly protruded muscle (53), the rubber washer (8) that placement one is compressed by plastic spacer (9) in the pit that forms between protruding circle (52) and axis hole, rubber washer (8) endoporus is slightly less than the coupling external diameter, plastic spacer (9) external diameter is greater than the protruding circle of bearing support (52), the bearing support of p-m rotor face (5) is provided with an annular boss (54) concentric with inner hole of bearing seat, pit concentric on described annular boss (54) and the electric machine casing docks setting-in, guarantees concentricity; Fan-shaped boss (42) end of coupling (4) is sleeved in the plastic cylinder (31) of p-m rotor (2), the fan-shaped boss of coupling (42) rotates pairing with p-m rotor block (32), direct bump for fear of both makes a noise, and respectively puts a rubber column (13) in link stopper (32) both sides during installation.

Claims

1. mini-sized shaded pole type water-drainage pump, comprise coiling assembly, stator iron core, electric machine casing, pump case and axle center assembly, the axle center assembly is integral p-m rotor, coupling, bearing support, impeller sets by motor shaft, it is characterized in that cylindrical shape coupling middle part is equipped with a protruding circle, the pipe of coupling one end has a fan-shaped boss that fuses with protruding circle outward, this end of coupling endoporus is provided with a pit greater than diameter of bore, and the end face of the coupling the other end is surrounded by several at interval uniform boss; Impeller constitutes by blade, base, axis hole and by the central siphon of axis hole extension, is equipped with the pit circle of being separated by some muscle on the impeller base at central siphon place, central siphon by some block gaps evenly, the top spring sheet that has a projection forms; The impeller central siphon inserts in the coupling endoporus, and the boss of impeller base pit and coupling coincide and connects, and the spring sheet projection falls within the pit of coupling endoporus, also is set with bearing support between the protruding circle of impeller and coupling.

2. mini-sized shaded pole type water-drainage pump according to claim 1, the magnetic post that it is characterized in that p-m rotor in the assembly of axle center is coated with a plastic layer and extension has a plastic cylinder, described plastic cylinder inwall is provided with a block, and this block rotates pairing with the fan-shaped boss that is sleeved on the coupling in the plastic cylinder.

3. mini-sized shaded pole type water-drainage pump according to claim 1 and 2 is characterized in that being equipped with metal insert in the endoporus of bearing support.

4. mini-sized shaded pole type water-drainage pump according to claim 3, it is characterized in that being equipped with on the impeller face bearing support the protruding circle concentric with axis hole, protruding circle inboard is provided with inwardly protruded muscle, the rubber washer that placement one is compressed by plastic spacer in the pit that forms between protruding circle and axis hole.

5. mini-sized shaded pole type water-drainage pump according to claim 4 is characterized in that the rubber washer endoporus is slightly less than the coupling external diameter, and the plastic spacer external diameter is greater than the protruding circle of bearing support.

6. mini-sized shaded pole type water-drainage pump according to claim 3 is characterized in that the bearing support of p-m rotor face is provided with an annular boss concentric with inner hole of bearing seat, and pit concentric on described annular boss and the electric machine casing docks setting-in.

7. mini-sized shaded pole type water-drainage pump according to claim 1 and 2 is characterized in that the outside of bearing support is fixed by electric machine casing and pump case.

8. mini-sized shaded pole type water-drainage pump according to claim 2, its feature respectively is equipped with a rubber column in the block both sides of p-m rotor.