CN201103548Y

CN201103548Y - Water discharge pump

Info

Publication number: CN201103548Y
Application number: CNU2007201563983U
Authority: CN
Inventors: 张平
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-08
Filing date: 2007-11-08
Publication date: 2008-08-20
Anticipated expiration: 2017-11-08

Abstract

The utility model relates to a draining pump, comprising a pump body, an impeller and a motor; a cavity is formed at the center of the impeller; a stop block is formed at the internal wall of the cavity; the rotating shaft of the motor extends into the cavity, and a shifting fork is fixedly arranged at one end of the rotating shaft. Under the initial situation, a starting buffer space L is arranged between the shifting fork and the stop block, while under the working situation, the shifting fork collides with the stop block to drive the impeller to rotate; a rubber shock absorption sleeve is sleeved at the shifting fork, and the rubber shock absorption sleeve covers the shifting fork. At least one convex rib is formed at the contact face where the rubber shock absorption sleeve contacts the stop block. The convex rib is formed at the shock absorption sleeve of the utility model and a line contact way is adopted between the shock absorption sleeve and the stop block, thus effectively reducing noise and having better buffer effect simultaneously.

Description

A kind of draining pump

Technical field

The utility model relates to a kind of centrifugal draining pump, relates in particular to a kind of centrifugal draining pump that is used for washing machine.

Background technique

The centrifugal draining pump of installing on the washing machine of the prior art in order to reduce cost, is raised the efficiency, and adopt permagnetic synchronous motor, but the starting torque of permagnetic synchronous motor is very little, causes motor rotation blockage easily.In order to address the above problem, some solutions have appearred in the prior art.As China Patent No. is No. 200620054699.0 utility model patents, the day for announcing is on June 27th, 2007, notification number is CN2916195, it discloses a kind of centrifugal draining pump, comprise two rotor chamber and draining pump cover chambeies that isolate mutually, rotor chamber is made up of the pump housing, p-m rotor, rotor shaft, bearing and bearing supports; Draining pump cover chamber comprises pump cover, axle sleeve, the impeller composition that contains water intake, and there is a receiving cavity in impeller central authorities, are used for ccontaining axle sleeve, and described axle sleeve has a tubular body, and the sidewall of tubular body is protruding with one and starts muscle, and it is in aggregates to start muscle and axle sleeve; The inwall projection one spacing muscle of the receiving cavity of described impeller central authorities, starting muscle is just changeing or is reversing the distance back certain and interfering with this spacing muscle; Each group at above-mentioned startup muscle and spacing muscle is interfered in surface of contact, and every group has at least one to interfere on the surface of contact along axially having a groove, and the opening end of this groove is narrower than its inner cell body; Other has beam, and it is raised with a fin with the one side of interfering surface of contact to be fitted, and this fin and described groove fit are inlaid in the groove and with spacing muscle or start muscle formation and fit tightly by this fin.Such scheme only is at the surface of contact that spacing muscle and startup muscle are interfered mutually beam to be set, when work, the top of axle sleeve and sidewall also all can bump with the inner chamber of impeller, produce bigger noise, and working long hours has a strong impact on the working life of draining pump; Secondly, the beam in the such scheme is that face contacts with spacing muscle, so still can produce certain noise.The such scheme installation is comparatively loaded down with trivial details in addition, influences manufacturing efficiency.

The model utility content

Technical problem to be solved in the utility model is to overcome the deficiency of prior art, provides that a kind of noise is little, simple in structure, electric motor starting moment is little, the draining pump of long service life.

A kind of draining pump that provides according to the utility model, comprise a pump housing, one is installed in the motor that the interior impeller of the described pump housing and drives described impeller, the center of described impeller is formed with a cavity, be formed with a block on the inwall of described cavity, the rotating shaft of described motor is stretched in the described cavity, its end is installed with a shift fork, under original state, has the buffering of startup spacing L between described shift fork and the described block, under the working state, described shift fork and described block are inconsistent, promote described wheel rotation, be set with a rubber shock-absorbing sleeve on the described shift fork, described shock absorbing sleeve wraps up described shift fork, is formed with at least one convex tendon on described shock absorbing sleeve and the contacted surface of contact of described block.

A kind of draining pump that provides according to the utility model also has following attached technical characteristics:

Described shift fork comprises a base, is formed in assembly department and contact part on the described base, and described machine shaft is fixedly connected on the described assembly department, matches with described block in described contact part.

Described shock absorbing sleeve is sleeved on described assembly department and the described contact part, with described assembly department and described contact part parcel.

Described shock absorbing sleeve comprises first shock reducing structure that is sleeved on the described assembly department and second shock reducing structure that is sleeved on the described contact part, and described first shock reducing structure and described second shock reducing structure are integrally formed.

Described convex tendon is formed on the bi-side of second shock reducing structure.

The quantity of described convex tendon is the 2-8 bar.

The cross section of described convex tendon is triangle, semicircle or half elliptic.

Described shock absorbing sleeve is fixedly connected by Bond and described shift fork.

Described block is a hollow-core construction.

The top of described rotating shaft is equipped with a rubber shock-absorbing ring.

A kind of draining pump that provides according to the utility model compared with prior art has following advantage: at first, be formed with convex tendon on the shock absorbing sleeve of the present utility model, the mode that adopts line contact between shock absorbing sleeve and the block can effectively reduce noise like this, and the while cushioning effect is better; Secondly, shock absorbing sleeve is to be sleeved on the shift fork, wraps the top of shift fork is whole, like this, all has vibration-absorptive material to separate between the roof of shift fork and sidewall and the impeller inner chamber, thereby effectively reduces noise; Once more, owing to adopt the structure of integral assembling, therefore, more simple and convenient during installation.

Description of drawings

Fig. 1 is a kind of embodiment's of the utility model a sectional view.

Fig. 2 is a kind of embodiment's of the utility model a three-dimensional exploded view.

Fig. 3 is the vertical view cutaway drawing of impeller and shift fork original state in the utility model, the matching relationship of shift fork shown in the figure and block.

Fig. 4 is impeller and the shift fork vertical view cutaway drawing under in working order in the utility model, the matching relationship of shift fork shown in the figure and block.

Fig. 5 is the stereogram of shock absorbing sleeve in the utility model.

Fig. 6 is the stereogram of shift fork in the utility model.

Embodiment

Referring to Fig. 1 to Fig. 4, in a kind of preferred embodiment that the utility model provides, comprise that a pump housing 1, is installed in the motor 3 that the described pump housing 1 interior impeller 2 and drives described impeller 2, the described pump housing 1 is provided with water intake and water outlet.The center of described impeller 2 forms a cavity 21, form a block 22 on the inwall of described cavity 21, the rotating shaft 31 of described motor 3 is stretched in the described cavity 22, its end is installed with a shift fork 32, under original state, has the buffering of startup spacing L between described shift fork 32 and the described block 22, under the working state, described shift fork 32 and described block 22 are inconsistent, promote described impeller 2 and rotate.The utility model will be reserved the space of certain distance between described shift fork 32 and the described block 22, reserve buffering spacing L for the startup of motor 3, makes motor 3 drive load again after startup.Reduced starting torque greatly, the startup of motor 3 is more prone to and makes things convenient for.

Referring to Fig. 1, in the foregoing description that the utility model provides, described motor 3 is installed in the housing 5, and described housing 5 fixes with the described pump housing 1, is provided with a seal ring 11 between them, thereby forms a sealed cavity.Form sealed cavity and can prevent that sealing enters in the described housing 5, damage motor 3.

Referring to Fig. 1 and Fig. 2, in the foregoing description that the utility model provides, also be set with damped ring 311, impeller fixed plate 312, positioning disk 313, envelope reel 314, front shaft sleeve 315 on rotating shaft 31 front ends of described motor 3, above-mentioned parts cooperatively interact together.Because the rotating shaft 31 of described motor 3 will be stretched in the described impeller 2, therefore, above-mentioned parts can play the effect of supporting and sealing, and prevent that the water in the pump housing 1 from entering in the housing 5.Rotating shaft 31 rear ends of described motor 3 are set with rear axle housing 317 and back shock ring 318, make described motor 3 can be installed in the described housing 5, and rotating shaft 31 can freely be rotated.

Referring to Fig. 1 and Fig. 2, the utility model difference from prior art is, be set with a rubber shock-absorbing sleeve 4 on the described shift fork 32, described shock absorbing sleeve 4 is formed with at least one convex tendon 41 with described shift fork 32 parcels on described shock absorbing sleeve 4 and the described block 22 contacted surface of contact.The utility model is provided with convex tendon 41 and makes that line contacts between shock absorbing sleeve 4 and the described block 22, reduces surface of contact between the two, thereby effectively reduces noise, and cushioning effect is better simultaneously.In addition, suit shock absorbing sleeve 4 on the shift fork 32, with shift fork 32 parcels, like this, shift fork 32 all is separated with shock absorbing sleeve with the surface of contact of impeller 2 inner chambers, can effectively abate the noise.

Referring to Fig. 1, Fig. 2 and Fig. 6, in the foregoing description that the utility model provides, described shift fork 32 comprises a base 321, is formed in assembly department 322 and contact part 323 on the described base 321, described motor 3 rotating shafts 31 are fixedly connected on the described assembly department 322, match with described block 22 in described contact part 323.Described shock absorbing sleeve 4 is sleeved on described assembly department 322 and the described contact part 323, with described assembly department 322 and described contact part 323 parcels.

Referring to Fig. 2 and Fig. 5, in the foregoing description that the utility model provides, described shock absorbing sleeve 4 comprises first shock reducing structure 42 and second shock reducing structure 43 that is sleeved on the described contact part 323 that is sleeved on the described assembly department 322, and described first shock reducing structure 42 and described second shock reducing structure 43 are integrally formed.Because shock absorbing sleeve 4 is overall structures, therefore, it is easier for installation.Said structure can be sleeved on shock absorbing sleeve 4 top of shift fork 32 fully, installs more conveniently, and damping effect is better.

Referring to Fig. 2 to Fig. 5, in the foregoing description that the utility model provides, described convex tendon 41 is formed on the bi-side of second shock reducing structure 43, and its quantity is the 2-8 bar, present embodiment is for being formed with two on each side, makes described second shock reducing structure, 43 stressed balances more.The cross section of described convex tendon 41 is triangle, semicircle or half elliptic, and said structure can guarantee that line contacts between convex tendon 41 and the described block 22, can certainly be other shape, should guarantee that line contacts between convex tendon 41 and the described block 22 to get final product.

Referring to Fig. 2, in the foregoing description that the utility model provides, described shock absorbing sleeve 4 can directly be sleeved on the shift fork 32, certainly, and in order to improve both connection effects, also can be fixed together between described shock absorbing sleeve 4 and the shift fork 32 by Bond, Bond can be a glue, perhaps other binding materials, and final purpose makes described shock absorbing sleeve 4 be bonded and fixed on the described shift fork 32, it can not be become flexible, can prolong the working life of shock absorbing sleeve 4 so greatly.

Referring to Fig. 3 and Fig. 4, in the foregoing description that the utility model provides, described block 22 is a hollow-core construction.Described block 22 is set to hollow-core construction, can increases the elasticity of block 22, make contacting between block 22 and the shift fork 32 cushion.Thereby, can effectively reduce the noise that produces when block 22 contacts with shift fork 32.

Referring to Fig. 1 and Fig. 2, in the foregoing description that the utility model provides, the top of described rotating shaft 31 is equipped with a rubber shock-absorbing ring 316.Top that described shock ring 316 can the described rotating shaft 31 of efficient buffer and the friction between impeller 2 inner chambers are set at the top of described rotating shaft 31, reduce consequent noise, improve the working life of product.

Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can change that scope of the present invention is limited by claims and equivalent thereof to these embodiments.

Claims

1, a kind of draining pump, comprise a pump housing (1), one is installed in the motor (3) that the interior impeller (2) of the described pump housing (1) and drives described impeller (2), the center of described impeller (2) is formed with a cavity (21), be formed with a block (22) on the inwall of described cavity (21), the rotating shaft (31) of described motor (3) is stretched in the described cavity (21), its end is installed with a shift fork (32), under original state, has the buffering of startup spacing L between described shift fork (32) and the described block (22), under the working state, described shift fork (32) is inconsistent with described block (22), promoting described impeller (2) rotates, it is characterized in that: be set with a rubber shock-absorbing sleeve (4) on the described shift fork (32), described shock absorbing sleeve (4) is formed with at least one convex tendon (41) with described shift fork (32) parcel on described shock absorbing sleeve (4) and the contacted surface of contact of described block (22).

2, a kind of draining pump as claimed in claim 1, it is characterized in that: described shift fork (32) comprises a base (321), is formed in assembly department (322) and contact part (323) on the described base (321), described motor (3) rotating shaft (31) is fixedly connected on the described assembly department (322), and match with described block (22) described contact part (323).

3, a kind of draining pump as claimed in claim 2 is characterized in that: described shock absorbing sleeve (4) is sleeved on described assembly department (322) and described contact part (323), with described assembly department (322) and described contact part (323) parcel.

4, a kind of draining pump as claimed in claim 2, it is characterized in that: described shock absorbing sleeve (4) comprises first shock reducing structure (42) that is sleeved on the described assembly department (322) and is sleeved on second shock reducing structure (43) on the described contact part (323) that described first shock reducing structure (42) and described second shock reducing structure (43) are integrally formed.

5, a kind of draining pump as claimed in claim 4 is characterized in that: described convex tendon (41) is formed on the bi-side of second shock reducing structure (43).

6, a kind of draining pump as claimed in claim 1 is characterized in that: the quantity of described convex tendon (41) is the 2-8 bar.

7, a kind of draining pump as claimed in claim 1 is characterized in that: the cross section of described convex tendon (41) is triangle, semicircle or half elliptic.

8, a kind of draining pump as claimed in claim 1 is characterized in that: described shock absorbing sleeve (4) is fixedly connected by Bond and described shift fork (32).

9, a kind of draining pump as claimed in claim 1 is characterized in that: described block (22) is a hollow-core construction.

10, a kind of draining pump as claimed in claim 1 is characterized in that: the top of described rotating shaft (31) is equipped with a rubber shock-absorbing ring (316).