CN210660621U - Electric water pump - Google Patents

Abstract

The utility model belongs to the technical field of motor production detects, specifically disclose an electric water pump, it includes motor, water pump and base, motor and water pump respectively with pedestal mounting connection, motor and water pump pass through motor spindle and the mutual rigid connection of water pump axle, and the link of motor spindle and water pump axle is equipped with blind hole and complex axle head joint portion with it respectively, the mounting is connected in the blind hole and the connection position setting of axle head joint portion. Compared with the prior art, the utility model, electronic water pump can simplify the structure of electronic water pump greatly to corresponding material consumption and processing, equipment work load that reduce improve production efficiency, reduction in production cost.

Description

Electric water pump

Technical Field

The utility model belongs to the technical field of motor production, especially an electric water pump.

Background

The electric water pump is generally formed by combining a motor and a water pump, and at present, in order to avoid vibration and noise caused by vibration during operation, a micro electric water pump generally adopts a structure that the motor and the water pump are coaxial; in the electric water pump with a larger model, in order to facilitate maintenance and reduce maintenance cost, a two-body structure is adopted, but vibration and noise caused by coaxiality errors of the motor shaft and the water pump shaft are considered, and the motor shaft and the water pump shaft are generally elastically connected by a coupler.

For example, patent CN206221189U discloses a vehicle-mounted electric water pump, which includes a high pressure water pump, a three-phase asynchronous motor for driving the high pressure water pump, and a controller for controlling the three-phase asynchronous motor, wherein the three-phase asynchronous motor is connected with the high pressure water pump through a flexible transmission mechanism, and the flexible transmission mechanism adopts a coupling transmission mechanism, a belt transmission mechanism or a gear transmission mechanism. Although the transmission mechanism of the vehicle-mounted electric water pump has elasticity, the integral vibration of the electric water pump during working can be reduced to a certain extent, the mechanism is complex, the reduction of the manufacturing cost is limited, the coaxiality of the three-phase asynchronous motor and the high-pressure water pump spindle is poor, the relative swing between the three-phase asynchronous motor spindle and the high-pressure water pump spindle cannot be avoided, and therefore the transmission efficiency of the driving power of the three-phase asynchronous motor is influenced, and the consumption of electric energy is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides an above-mentioned defect that can overcome prior art existence effectively, simple structure, power pass advantage efficient, the few electric water pump of energy resource consumption.

Realize the utility model discloses a technical scheme that the purpose was taken is: the electric water pump comprises a motor, a water pump and a base, wherein the motor and the water pump are respectively connected with the base in an installing mode, the motor and the water pump are mutually and rigidly connected through a motor main shaft and a water pump shaft, the connecting end of the motor main shaft and the water pump shaft is respectively provided with a blind hole and a shaft end combining part matched with the blind hole, and a connecting fixing part is arranged at the connecting part of the blind hole and the shaft end combining part.

The connecting and fixing piece is a connecting key strip, and key grooves matched with the connecting key strip are respectively arranged on the circumferential joint surface of the blind hole combined with the shaft end joint part.

The connecting key bars are wedge-shaped key bars.

The number of the connecting key strips is 2-3, and the connecting key strips are symmetrically arranged relative to the axes of the motor main shaft and the water pump shaft.

The blind hole and the shaft end combining part adopt taper fit.

The connecting and fixing piece is a pin, a radial through hole matched with the pin is formed in the blind hole, and a threaded hole matched with the pin is correspondingly formed in the shaft end combining part and the radial through hole.

The radial through holes are long slotted holes.

And a wedge block is arranged in the long slotted hole.

The motor and the water pump are respectively provided with connecting flanges which are mutually connected and matched.

An adjusting washer is arranged between the two connecting flanges.

The utility model has the advantages that:

1) the utility model discloses an electric water pump adopts the direct rigid connection of motor owner and water pump axle, can simplify electric water pump's structure greatly to corresponding reduction material consumption and processing, equipment work load improve production efficiency, reduction in production cost.

2) The utility model discloses in, set up the connecting key strip into wedge structure, and the symmetry sets up to 2-3, can be so that the circumference clearance equipartition between blind hole 4 and the axle head joint portion does benefit to the axiality of guaranteeing motor spindle and water pump axle, can avoid the water pump vibration to appear in the operation process effectively.

3) The blind hole of the motor main shaft and the water pump shaft is connected with the shaft end joint part in a taper fit manner, so that the connection gap can be completely eliminated, the motor main shaft and the water pump shaft are connected into a rigid whole, the running performance of the electric water pump is stable, the coaxial structure of the motor and the water pump can be compared, the kinetic energy transmission efficiency can be reliably improved, and the energy consumption is saved; and the existing movable connecting structure is obviously simplified, the production cost is effectively reduced, and the production efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the enlarged structure of A in FIG. 1;

FIG. 3 is an enlarged partial schematic view of A in FIG. 1;

fig. 4 is a schematic structural diagram of a second embodiment of the present invention;

fig. 5 is a schematic structural diagram of a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a fourth embodiment of the present invention.

Detailed Description

Example one

As shown in fig. 1 and 2, the electric water pump of the present invention includes a motor 1, a water pump 3 and a base 2, wherein the motor 1 and the water pump 3 are respectively installed on the base 2, and the motor 1 and the water pump 3 are directly connected to each other through a motor spindle 4 and a water pump shaft 5. The connecting ends of the motor main shaft 4 and the water pump shaft 5 are respectively provided with a blind hole 4-1a and a shaft end combining part 5-1a matched with the blind hole 4-1a, namely the blind hole 4-1a can be arranged at the connecting and matching end of the motor main shaft 4, and the shaft end combining part 5-1a matched with the inner diameter of the blind hole 4-1a at the end part of the motor main shaft 4 is arranged at the connecting and matching end of the water pump shaft 5; of course, a blind hole may be provided at the coupling end of the water pump shaft 5, and a shaft end coupling portion (not shown) that is matched with the inner diameter of the blind hole at the end of the water pump shaft 5 may be provided at the coupling end of the motor main shaft 4. The connecting part of the blind hole 4-1a and the shaft end combining part 5-1a is provided with a connecting fixing piece which can adopt a connecting key strip 6a, and correspondingly, key grooves 4-2a and 5-2 matched with the connecting key strip 6a are respectively arranged on the combining circumferential surface of the blind hole 4-1a and the shaft end combining part 5-1 a.

When the technical scheme of the embodiment is implemented, the motor 1 and the water pump 3 can be directly connected with the water pump shaft 5 through the motor spindle 4, and the concentricity of the combination of the two shafts and the distance between the motor 1 and the water pump 3 are adjusted and fixed through the base 2, so that the whole structure of the electric water pump can be greatly simplified, and the complicated two-shaft connecting mechanism and the connecting flange and other structures arranged at the corresponding end of the combination of the motor 1 and the water pump 3 are reduced, so that a large amount of materials and processing cost are saved, and meanwhile, the installation process is simple, and only the radial clearance between the blind hole 4-1a and the shaft end combining part 5-1a matched with the blind hole is reduced as much as possible, preferably not more than 0.1mm, so as to avoid the relative swinging of the two shafts in the operation process.

In order to better avoid the relative swing of the two shafts in the operation process, 2 or 3 connecting key strips 6a (shown in figure 3) can be arranged and are symmetrically arranged relative to the axes of the motor main shaft 1 and the water pump shaft 3, so that the radial clearance arrangement of the blind hole 4-1a and the shaft end joint part 5-1a matched with the blind hole can be properly widened, and the processing difficulty of the blind hole 4-1a and the shaft end joint part 5-1a is further reduced.

Example two

Referring to fig. 4, further, the connecting key strips 6a may be arranged in a wedge-shaped structure, and the blind holes 4-1a or the shaft end engaging portions 5-1a engaged therewith are correspondingly arranged in wedge-shaped key grooves 4-2b, and it is preferable that the number of the wedge-shaped connecting key strips 6b is 2-3 (see fig. 4) and arranged concentrically with respect to the motor main shaft 4 and the water pump shaft 5. Therefore, circumferential gaps between the blind hole 4-1a and the shaft end joint part 5-1a can be uniformly distributed, the coaxiality of the motor main shaft 4 and the water pump shaft 5 is favorably ensured, and the water pump is prevented from vibrating in the operation process.

EXAMPLE III

Referring to fig. 5, as a further technical solution, a blind hole 4-1 b at the end of the motor spindle 4 or the water pump shaft 5 and a shaft end joint 5-1 b of the water pump shaft 5 or the motor spindle 4 are in taper fit, that is, the inner wall of the blind hole 4-1 b and the outer circumference of the shaft end joint 5-1 b are set to be tapered surfaces with the same taper. The connecting and fixing piece can adopt pins 7, and the number of the pins 7 can be 1-3. Specifically, a threaded hole 5-3 may be provided at a portion where the shaft end coupling portion 5-1 b is inserted into the blind hole 4-1 b, and a radial through hole 4-3 may be provided at the shaft end coupling portion 5-1 b. Thus, the shaft end engaging portion 5-1 b is inserted into the blind hole 4-1 b and then fixed by the pin 7. Of course, it is preferable to set the through hole 4-3 as an axial long groove hole, and the insertion depth can be adjusted when the blind hole 4-1 b is not matched with the shaft end joint part 5-1 b and becomes loose due to abrasion in long-time operation. A wedge 8 may be provided in the gap between the pin 7 and the slot 4-3 to prevent the shaft end engaging portion 5-1 b from receding. The wedge 8 can be made of metal with certain rigidity, metal material with certain plasticity such as lead block, and nonmetal material with certain elasticity such as nylon and polytetrafluoroethylene.

Example four

Referring to fig. 6, in the case of the first and second embodiments, when the connection between the water pump 1 and the motor 3 and the base 2 is loosened during operation, the blind hole 4-1a and the shaft end joint portion 5-1a are easy to retreat relatively. In order to prevent the occurrence of the situation, the connecting flanges 7 and 8 which are mutually connected and matched can be respectively arranged at the opposite ends of the motor 1 and the water pump 3, so that the blind hole 4-1a and the shaft end joint part 5-1a can be prevented from relatively retreating, and the two connecting flanges 7 and 8 can be tightly connected after the coaxiality of the motor main shaft 4 and the water pump shaft 5 is adjusted in place during assembly, thereby avoiding the vibration of the electric water pump in the operation process. An adjusting washer 9 can also be arranged between the two connecting flanges 7, 8. After the motor main shaft 4 and the water pump shaft 5 are tightly butted with each other through the blind hole 4-1a and the shaft end joint part 5-1a, the two connecting flanges 7 and 8 are tightly connected together by using the connecting bolt. Meanwhile, for the initially processed and assembled electric water pump, a certain gap is designed and reserved between the two connecting flanges 7 and 8, so that the electric water pump can run in a certain period of time, and when the blind hole 4-1a and the shaft end joint part 5-1a are worn, the gap between the two connecting flanges 7 and 8 can be adjusted.

Claims (10)

1. The utility model provides an electric water pump, includes motor, water pump and base, motor and water pump respectively with pedestal mounting connection, its characterized in that: the motor and the water pump are rigidly connected with each other through a motor main shaft and a water pump shaft, the connecting ends of the motor main shaft and the water pump shaft are respectively provided with a blind hole and a shaft end combining part matched with the blind hole, and the connecting part of the blind hole and the shaft end combining part is provided with a connecting fixing part.

2. The electric water pump of claim 1, wherein: the connecting and fixing piece is a connecting key strip, and key grooves matched with the connecting key strip are respectively arranged on the circumferential joint surface of the blind hole combined with the shaft end joint part.

3. The electric water pump of claim 2, wherein: the connecting key bars are wedge-shaped key bars.

4. The electric water pump as claimed in claim 2 or 3, wherein: the number of the connecting key strips is 2-3, and the connecting key strips are symmetrically arranged relative to the axes of the motor main shaft and the water pump shaft.

5. The electric water pump of claim 1, wherein: the blind hole and the shaft end combining part adopt taper fit.

6. The electric water pump as claimed in claim 1 or 5, wherein: the connecting and fixing piece is a pin, a radial through hole matched with the pin is formed in the blind hole, and a threaded hole matched with the pin is correspondingly formed in the shaft end combining part and the radial through hole.

7. The electric water pump of claim 6, wherein: the radial through holes are long slotted holes.

8. The electric water pump of claim 7, wherein: and a wedge block is arranged in the long slotted hole.

9. The electric water pump of claim 2, wherein: the motor and the water pump are respectively provided with connecting flanges which are mutually connected and matched.

10. The electric water pump of claim 9, wherein: an adjusting washer is arranged between the two connecting flanges.

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