CN201474964U

CN201474964U - Water pump

Info

Publication number: CN201474964U
Application number: CN2009201391863U
Authority: CN
Inventors: 王丽珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-24
Filing date: 2009-06-24
Publication date: 2010-05-19
Anticipated expiration: 2019-06-24

Abstract

The utility model discloses a water pump comprising a motor, a base, a lower cover, a base body, a gear group, a metallic gasket, a sealing rubber piece and an upper cover, wherein the gear group is arranged in a cavity formed by the upper cover, the base body and the lower cover; and two opposite sides of the cavity are respectively provided with a water inlet and a water outlet. The sealing rubber piece is arranged between the upper cover and the base body, and the metallic gasket is arranged between the sealing rubber piece and the gear group. The upper cover, the base body and the lower cover are locked at one side of the base by screws, and the motor is positioned at the other side of the base. A transmission shaft of the motor penetrates through sealing parts on the base, the lower cover and the base body and is connected with a gear in the gear group coaxially. The water pump adds a metallic gasket between the sealing rubber piece and the gear group on the basis of the prior art, has smooth surface of the rigid metallic gasket and can greatly reduce the friction of the metallic gasket and the gear group, thus reducing the noise, also being capable of reducing the gap of the metallic gasket and the gear group, avoiding backflow phenomenon and having high pumping efficiency.

Description

A kind of water pump

Technical field

The utility model relates to a kind of water pump, is applicable to household electric appliance or auto parts machinery etc.

Background technique

In the prior art, a kind of water pump that is applicable to household electric appliance or auto parts machinery etc. is arranged, as shown in Figure 1, comprise motor 10, base 20, lower cover 30, pedestal 40, gear train 50, sealed film 60 and loam cake 70.Gear train 50 is made up of two groups of gear engagement, be installed in the cavity of loam cake 70, pedestal 40 and lower cover 30 formation, this cavity is provided with the water outlet 402 that a water inlet 401 and that is connected to the input water tank is connected to water outlet device respectively in relative both sides, sealed film 60 is placed between loam cake 70 and the pedestal 40.Loam cake 70, pedestal 40 and the locking of lower cover 30 usefulness screws are in a side of base 20.Motor 10 is positioned at the opposite side of base 20, and the transmission shaft of motor 10 runs through coaxial a connection of gear in Sealing 80 and the gear train 50 on base 20, lower cover 30 and the pedestal 40.

Under the "on" position, motor 10 transmission shafts drive one of them gear rotation, the gear driven another one gear rotation of rotation, the gear of two rotations synchronously forms negative pressure in water inlet 401 1 sides of cavity, and under the effect of hydraulic pressure, the water in the water tank flows into from water inlet 401, drive from water outlet 402 outflows by gear train 50, so, the side that not the stopping of gear train 50 rotated constantly at cavity forms negative pressure, and current are promptly extracted out in water tank continuously.

Though the above-mentioned sealed film 60 that is placed between loam cake 70 and the pedestal 40 can play the effect of sealing, but, because of sealed film 60 has certain pliability, easy and gear rubs, cause the rotation of gear train 50 to be obstructed, produce noise, and the water flow instability, at this, someone has proposed the scheme with O type ring replacement seal film 60, but because of deformation easily takes place in O type ring assembling back, cause loam cake 70 to cooperate the easy local perk in back with O type ring, have bigger gap between loam cake 70 and gear, cause current being brought to the water outlet process from water inlet, easily be back to water inlet by the gap between gear, cause the working efficiency of water pump not high, the effect of drawing water is bad.

In view of this, the inventor makes improvements on the architecture basics of raw water pump, and this case produces thus.

The model utility content

The purpose of this utility model is to provide a kind of water pump, can avoid refluxing, the pump level is steady and reduce noise.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of water pump, comprise motor, base, lower cover, pedestal, gear train, sealed film, metallic shim and loam cake, gear train is made up of two groups of gear engagement, be installed in the cavity of loam cake, pedestal and lower cover formation, this cavity is provided with the water outlet that a water inlet and that is connected to the input water tank is connected to water outlet device respectively in relative both sides; Sealed film is placed between loam cake and the pedestal, and metallic shim is placed between sealed film and the gear train.Loam cake, pedestal and lower cover lock in a side of base with screw, and motor is positioned at the opposite side of base; The transmission shaft of motor runs through coaxial a connection of gear in Sealing and the gear train on base, lower cover and the pedestal.

Described Sealing is the annular solid of rotation of one " n " tee section, sets a longitudinal section except that solid of rotation top and pars intramuralis and is outside the ironware of inversion " L " shape, and remaining part is rubber; Solid of rotation central authorities are a through hole that supplies transmission shaft to pass, and through-hole wall is skewed.

Described Sealing is the annular solid of rotation of " K " tee section of a rubber material, and wherein the vertical edge of " K " shape turns round the outer wall that becomes lip ring, and is intervally distributed with annular flange flange in outer wall surface; Two revolution of arms of " K " shape constitute first seal ring and second seal ring of Sealing inwall, between two seal rings, all keep certain elastic gap between two seal rings and the Sealing inwall; Sealing central authorities form a through hole that supplies transmission shaft to pass.

The gear of described gear train is a straight-tooth.

The gear of described gear train is a helical teeth.

The utility model compared with prior art, between sealed film and gear train, set up a metallic shim on the basis of existing technology, the metallic shim smooth surface of rigidity, can significantly reduce and gear train between friction, thereby minimizing noise, can reduce the gap with gear train in addition again, avoid backflow phenomenon, the pump level is steady, efficient is high.

Description of drawings

Fig. 1 is the structural representation of water pump in the prior art;

Fig. 2 is the structural representation of the utility model water pump;

Fig. 3 is a kind of structural section schematic representation of the utility model Sealing;

Fig. 4 is the another kind of structural section schematic representation of the utility model Sealing;

Fig. 5 is the whole structure figure of the another kind of structure of the utility model Sealing.

Embodiment

As shown in Figure 2, be preferred embodiment of the present utility model.

The water pump that the utility model discloses comprises motor 1, base 2, lower cover 3, pedestal 4, gear train 5, sealed film 6, metallic shim 9 and loam cake 7.Gear train 5 is made up of two groups of gear engagement, is installed in the cavity of loam cake 7, pedestal 4 and lower cover 3 formation, and this cavity is provided with the water outlet 42 that a water inlet 41 and that is connected to the input water tank is connected to water outlet device respectively in relative both sides.Sealed film 6 is placed between loam cake 7 and the pedestal 4, and metallic shim 9 is placed between sealed film 6 and the gear train 5.The lip ring 8 (as shown in Figure 3) that pedestal 4 is provided with a General Purpose Rubber moulding and can supplies motor 1 transmission shaft to pass, correspondingly, on root motor 1 housing of motor 1 transmission shaft, be provided with a protruding wall, an annular groove that is complementary with Sealing 8 shape sizes is set on the protruding wall.Loam cake 7, pedestal 4 and the locking of lower cover 3 usefulness screws are in a side of base 2, and motor 1 is positioned at the opposite side of base 2; The transmission shaft of motor 1 runs through 51 coaxial connections an of gear in Sealing 8 and the gear train 5 on base 2, lower cover 3 and the pedestal 4, Sealing 8 on the pedestal 4 is placed in the groove on the protruding wall, the fitting tight that is arranged so that the pump body each several part of Sealing 8 is avoided leaking in the course of the work.

Sealing 8 shown in Figure 3 is the annular solid of rotation of one " n " tee section, sets a longitudinal section except that solid of rotation top and pars intramuralis and is outside the ironware 81 of inversion " L " shape, and remaining part is rubber; Solid of rotation central authorities are a through hole that supplies transmission shaft to pass, and through-hole wall 82 is skewed.Set ironware 81 in the Sealing 8 and mainly be to avoiding Sealing 8 extrusion in assembly process to influence sealing effect, its inwall is designed to skewed and keeps certain elastic gap with outer wall, makes wall envelope better effects if.

Fig. 4, Figure 5 shows that another structure of Sealing 8, different with said structure, these Sealing 8 integral body are rubber parts.Sealing shown in the figure 8 is the annular solid of rotation of one " K " tee section, wherein the vertical edge side of " K " shape is turned round the outer wall of looping Sealing, and in outer wall surface twice annular flange flange 801 spaced apart, these annular flange flange 801 roles promptly are equivalent to be inverted in the aforementioned schemes " L " shape ironware 81 roles; Two revolution of arms of " K " shape constitute first seal ring 802 and second seal ring 803 of Sealing 8 inwalls, two seal rings stretch to same direction, and between two seal rings, all keep certain elastic gap between two seal rings and Sealing 8 inwalls, so can play the effect of double seal, and elastic gap be arranged so that Sealing 8 sealing effects are better; Sealing 8 central authorities form a through hole that supplies transmission shaft to pass.Because of Sealing 8 integral body of this structure are rubber parts, with aforementioned schemes relatively, moulding is simple, save cost, therefore with this scheme as preferred version of the present utility model.

Under the "on" position, the transmission shaft of motor 1 drives one of them gear 51 rotation, the gear 51 of rotation drives 52 rotations of another one gear, the gear train 5 of rotation forms negative pressure in water inlet 41 sides of cavity, under hydraulic action, water in the water tank flows into from water inlet 41, is driven from water outlet 42 by gear train 5 and flows out.

Improvement of the present utility model mainly is: on the prior art basis, between sealed film 6 and gear train 5, set up a metallic shim 9, cooperate original sealed film 6 can play the effect of sealing, reduced backflow again, avoided the friction with gear train 5, the water pumping efficiency height, noise is little.

In addition, the gear train 5 of present embodiment can be straight-tooth, also can be helical teeth (common components, this paper will not illustrate), and these two kinds of structures all can reach good pump water effect.

Claims

1. a water pump comprises motor, base, lower cover, pedestal, gear train, sealed film and loam cake, and gear train is installed in the cavity of loam cake, pedestal and lower cover formation, and this cavity is provided with a water inlet and a water outlet respectively in relative both sides; Sealed film is placed between loam cake and the pedestal, and loam cake, pedestal and lower cover lock in a side of base with screw, and motor is positioned at the opposite side of base; The transmission shaft of motor runs through coaxial a connection of gear in Sealing and the gear train on base, lower cover and the pedestal; It is characterized in that: between sealed film and gear train, set up a metallic shim.

2. a kind of water pump as claimed in claim 1 is characterized in that: described Sealing is the annular solid of rotation of " n " tee section, sets a longitudinal section except that solid of rotation top and inside, the outside and is the ironware of inversion " L " shape, and remaining part is rubber; Solid of rotation central authorities are a through hole that supplies transmission shaft to pass, and through-hole wall is skewed.

3. a kind of water pump as claimed in claim 1, it is characterized in that: described Sealing is the annular solid of rotation of " K " tee section of a rubber material, wherein the vertical edge of " K " shape turns round the outer wall that becomes lip ring, and is intervally distributed with annular flange flange in outer wall surface; Two revolution of arms of " K " shape constitute first seal ring and second seal ring of Sealing inwall, between two seal rings, all keep certain elastic gap between two seal rings and the Sealing inwall; Sealing central authorities form a through hole that supplies transmission shaft to pass.

4. a kind of water pump as claimed in claim 1 is characterized in that: the gear of described gear train is a straight-tooth.

5. a kind of water pump as claimed in claim 1 is characterized in that: the gear of described gear train is a helical teeth.