CN201335023Y

CN201335023Y - Low-noise start equipment of miniature draining pump

Info

Publication number: CN201335023Y
Application number: CNU2008202149364U
Authority: CN
Inventors: 王红宽; 沈玉明
Original assignee: CHANGZHOU LEILI ELECTRICAL EQUIPMENT Co Ltd
Current assignee: CHANGZHOU LEILI ELECTRICAL EQUIPMENT Co Ltd
Priority date: 2008-12-25
Filing date: 2008-12-25
Publication date: 2009-10-28
Anticipated expiration: 2018-12-25

Abstract

The utility model relates to low-noise start equipment of a miniature draining pump, which mainly comprises a metallic shaft coupling provided with a start bar and a plastic impeller provided with a start lug boss. The starting bar on the metallic shaft coupling adopts a sectorial start bar; the start lug boss in the inner chamber of the plastic impeller adopts a sectorial start lug boss; and the angle of the sector of a cavity of the bottom surface of the start lug boss is greater than that of the start bar installed in the cavity. The equipment is characterized in that a shock-absorbing block is respectively stuck to the two sides of the sectorial start lug boss with glue; an axial groove is respectively formed on the two side surfaces of the sectorial start lug boss, on which the shock-absorbing blocks are arranged, wherein the width of the notch of each axial groove is equal to or greater than the width of the groove; two convexes corresponding to the axial grooves are respectively arranged on the surfaces, on which the shock-absorbing block are arranged; and the operation surfaces of the shock-absorbing blocks adopt outward projecting arc-shaped surfaces. The utility model has the advantages of simple and reasonable structure, high mechanical strength, easy production and assembly and long service life; and therefore, the equipment is suitable to use on centrifugal miniature draining pumps of household appliances such as washing machines, dish washing machines and the like.

Description

The low noise starting drive of miniature draining pump

Technical field

The utility model relates to a kind of centrifugal draining pump, especially is used in the low starting drive of the centrifugal miniature draining pump of household electric appliance, belongs to the centrifugal pump field.

Background technique

The centrifugal miniature draining pump that uses in the household electric appliance, in order to solve water pump burns motor greatly easily because of starting load problem, all need between coupling and impeller, set up starting drive, make coupling can be behind the idle running several angle again drives impeller rotate, motor is started under no-load condition, automatically connect load again and the drives impeller rotation in startup and after turning an angle, effectively solved the problem of burning motor because of starting load greatly.This starting drive is mainly formed by being provided with the metal coupling that starts muscle and being provided with the plastic impeller that starts boss, startup muscle on the described metal coupling is fan-shaped startup muscle, startup boss in the plastic impeller inner chamber is fan-shaped startup boss, and the fan-shaped angle of fan-shaped startup boss bottom cavity is much larger than the fan-shaped angle of the startup muscle that is mounted in it.During assembling, the coupling that will connect with motor shaft is contained in the inner chamber of impeller, and the startup muscle that makes the coupling front end is contained in than starting in the low fan-shaped lumen channels of boss, in electric motor starting moment, earlier behind the idle running several angle, when start myospasm to start boss and contact after could the impeller rotation, make water pump realize the effect of No Load Start.Owing to start when muscle contacts with the startup boss and can send the noise of collision, in order to lower this noise, can start the muscle dual-side or/and startup boss dual-side is respectively equipped with beam, the setting of described beam can have several different methods, as the disclosed a kind of centrifugal draining pump of No. 200620054699.0 utility model patents of China, beam wherein is being raised with a fin with starting muscle or start on the faying surface that boss contacts, this fin matches and is inlaid in the groove along the groove that axially has with being located to start muscle or start the boss corresponding position, because of the opening end of groove is narrower than its inner cell body, starts muscle and start on the dual-side of boss so beam can be contained in.But, this project organization complexity, on working surface, offer groove and require the opening end of groove to be narrower than its inner cell body less than 3mm, the shape need of the fin on the beam is corresponding with groove, the anterior wide root that is fin is narrow, though this structure can be inserted into beam on the dual-side that starts muscle and startup boss respectively by groove and fin, but obviously there is the assembling difficulty, beam is impaired easily, influence quality of product, manufacturing efficiency is low, and, the groove of on arbitrary surface of contact, being opened, the capital influence starts the intensity of muscle or spacing muscle, and then influences the water pump life-span.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned the deficiencies in the prior art part, design a kind of simple and reasonable, to produce assembling easily simple, helps reducing production costs the low noise starting drive of the miniature draining pump that long service life and noise are little.

The low noise starting drive of miniature draining pump of the present utility model, comprise and be provided with the metal coupling that starts muscle and be provided with the plastic impeller that starts boss, startup muscle on the described metal coupling is fan-shaped startup muscle, be provided with the startup boss in the plastic impeller inner chamber, start the fan-shaped angle of the fan-shaped angle of boss bottom cavity much larger than the startup muscle that is mounted in it, wherein, the bi-side of described fan-shaped startup muscle are the plane, the dual-side that starts boss sticks with glue respectively and posts a snubber block, and is respectively equipped with a width of rebate L on the bi-side of the startup boss of pasting with snubber block ₁Be equal to or greater than groove insied width L ₂Axial notch, of on the stickup face of snubber block, being provided with and the corresponding projection of axial notch, and the working surface of snubber block be the outside arc shaped surface of protrusion.

Be used to paste the optional KB400 series instant drying adhesive of glue or the Prism series instant drying adhesive or the 441 type adhesive of snubber block.

The snubber block that the dual-side of the startup boss in the plastic impeller in the utility model sticks with glue, operating noise is reduced, working surface with snubber block is designed to suitably the outwards arc shaped surface of protrusion again, can make the elastic effect of snubber block better, starting is stable, noise is littler, the width of rebate of the groove that is provided with on the bi-side of fan-shaped startup boss is equal to or greater than the groove insied width again, then can suitably increase gluing area under the situation that does not increase assembling difficulty.Have advantages such as simple and reasonable, that the production assembling is easily simple, helps reducing production costs, and long service life and noise are low, be adapted at using in the centrifugal miniature draining pump on the household electric appliance such as washing machine, dishwasher.

Description of drawings

Fig. 1 is the structural representation of the metal coupling in the utility model;

Fig. 2 is the structural representation that is provided with the plastic impeller that starts boss in the utility model;

Fig. 3 is that the snubber block among Fig. 2 sticks on the partial enlarged drawing that starts on the boss.

Among the figure 1 is the metal coupling, the 2nd, and fan-shaped startup muscle, the 3rd, plastic impeller, the 4th, the bottom cavity, the 5th, start boss, the 6th, stick on the rubber pad that starts the boss dual-side, the 7th, the working surface of snubber block.

Embodiment

Referring to accompanying drawing, the high strength starting drive of miniature draining pump of the present utility model, comprise and be provided with the metal coupling that starts muscle and be provided with the plastic impeller that starts boss, startup muscle on the described metal coupling 1 is a fan-shaped startup muscle 2 (referring to Fig. 1), be provided with in plastic impeller 4 inner chambers and start boss 5, start the fan-shaped angle of the fan-shaped angle of boss 5 bottom cavitys 4 much larger than the startup muscle 2 that is mounted in it, wherein, the bi-side of described fan-shaped startup muscle 2 are the plane, and the dual-side that starts boss 5 sticks with glue respectively and posts a snubber block 6 (referring to Fig. 2 and Fig. 3).In order further to improve sticking strength, can on the bi-side of the startup boss of pasting with snubber block 5, be respectively equipped with a width of rebate L ₁Be equal to or greater than groove insied width L ₂Axial notch, of being provided with on the stickup face of snubber block 6 and the corresponding projection of axial notch, the working surface of snubber block 6 be the outside arc shaped surface 7 of protrusion.

Paste the optional KB400 series instant drying adhesive of glue or the Prism series instant drying adhesive or the 441 type adhesive of snubber block.

During assembling, after sticking on snubber block 6 on the startup boss 5 with glue earlier, the fan-shaped startup muscle 2 that will be contained in the joiner front end on the motor shaft again places the cavity 4 of plastic impeller intracavity bottom, because of the fan-shaped angle of bottom cavity 4 fan-shaped angle much larger than the startup muscle 2 that is mounted in it, so start muscle 2 can be bottom cavity 4 in free rotating certain angle, can impeller 3 rotations after 5 contacts of the startup boss in inner chamber.Be provided with snubber block 6 because start the working surface of boss 5 both sides, can play good buffer function, make the operating noise of draining pump lower, again owing to the working surface 7 of snubber block 6 is designed to the arc shaped surface of suitable outside protrusion, can make the elastic effect of snubber block better, starting is steady, noise is littler.

Claims

1, a kind of low noise starting drive of miniature draining pump, comprise and be provided with the metal coupling that starts muscle and be provided with the plastic impeller that starts boss, startup muscle on the described metal coupling is fan-shaped startup muscle, be provided with the startup boss in the plastic impeller inner chamber, start the fan-shaped angle of the fan-shaped angle of boss bottom cavity much larger than the startup muscle that is mounted in it, the bi-side that it is characterized in that described fan-shaped startup muscle are the plane, the dual-side that starts boss sticks with glue respectively and posts a snubber block, and on the bi-side of the startup boss of pasting with snubber block, be respectively equipped with the axial notch that a width of rebate L1 is equal to or greater than groove insied width L2, one and the corresponding projection of axial notch on the stickup face of snubber block, being provided with, and the working surface of snubber block is the arc shaped surface that outwards protrudes.

2, the low noise starting drive of miniature draining pump as claimed in claim 1 is characterized in that pasting the optional KB400 series instant drying adhesive of glue or the Prism series instant drying adhesive or the 441 type adhesive of snubber block.