CN203783888U

CN203783888U - Rotor oil pump

Info

Publication number: CN203783888U
Application number: CN201420162766.5U
Authority: CN
Inventors: 吴秀春
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-03
Filing date: 2014-04-03
Publication date: 2014-08-20
Anticipated expiration: 2024-04-03

Abstract

The utility model discloses a rotor oil pump which comprises a pump body, an outer rotor, an inner rotor, a pump shaft and a pump cover, wherein a groove formed in the pump body and the pump cover form a rotor cavity in a sealing manner; an oil inlet and an oil outlet are connected with the rotor cavity; the outer rotor and the inner rotor are embedded in the rotor cavity, are meshed with each other and are of eccentric structures; the tooth surface curve of the inner rotor and a circle are conjugated; the pump shaft penetrates through the pump body to be inserted into a concave hole in the pump cover; a cylindrical pin is arranged in the middle of the pump shaft; the pump shaft drives the inner rotor to rotate through the cylindrical pin. The rotor oil pump is simple and compact in structure, relatively large in oil suction vacuum degree, large in oil pump amount, good in oil supply uniformity, highly efficient, and long in service life and has an energy-saving effect.

Description

A kind of rotor oil pump

Technical field

The utility model relates to oil pump technology field, relates in particular to a kind of rotor oil pump.

Background technique

Traditional rotor oil pump is made up of housing, internal rotor, external rotor and pump cover etc.When rotor tooth form tooth Profile Design must make rotor forward any angle to, on the profile of tooth profile of the each tooth of inner and outer Rotator, total energy becomes mutually some contact.Between inner and outer Rotator, form so multiple active chambers, along with the rotation of rotor, the volume of active chamber is constantly to change.At a side cavity of oil input channel, because rotor is thrown off engagement, volume increases gradually, produces vacuum, machine oil is inhaled into, rotor continues rotation, and machine oil is brought to a side of oil road, at this moment, rotor just in time enters engagement, this cavity volume is reduced, and oil pressure raises, and machine oil is extruded and goes out through oil road force feed between cog.Like this, along with the continuous rotation of rotor, machine oil is just constantly inhaled into and extrudes.This type of rotor oil pump compact structure, boundary dimension is little, lightweight, fuel feeding good uniformity, cost is low, be widely used, but the slip resistance of this type of rotor oil pump inner and outer rotors mating surface is larger than gear pump on medium and small motor, and therefore power consumpiton is larger.

Model utility content

For the problems referred to above, the utility model provides that a kind of simple and compact for structure, oil suction degree of vacuum is large, pump oil mass is large, the rotor oil pump of fuel feeding good uniformity, efficient energy-saving, long service life.

For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of rotor oil pump, comprise the pump housing, external rotor, internal rotor, pump shaft and pump cover, in the described pump housing, be provided with a groove and the airtight formation rotor chamber of pump cover body, rotor cavity is connected with oil inlet hole and oil outlet, described external rotor and internal rotor are nested in rotor cavity, internal rotor and external rotor are intermeshing and be eccentric structure, the tooth trace of described internal rotor is the conjugation of circle, described pump shaft runs through in the shrinkage pool of pump housing insertion pump cover, in the middle of described pump shaft, be provided with straight pin, pump shaft drives internal rotor to rotate by straight pin.

Further, the bolt that the described pump housing and pump cover arrange by three annulars closely cooperates, and is provided with the pad that fish paper is made between the pump housing and pump cover.

Further, on the described pump housing and pump cover, correspondence is provided with two locating studs.

From the above-mentioned description to the utility model structure, compared to the prior art, the utlity model has following advantage:

The utility model is simple and compact for structure, and boundary dimension is little, lightweight, and oil suction degree of vacuum is larger, and pump oil mass is large, fuel feeding good uniformity, efficient energy-saving, long service life.

Brief description of the drawings

The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the cross-sectional view of a kind of rotor oil pump of the utility model;

Fig. 2 is the inner and outer rotors assembly structure schematic diagram of a kind of rotor oil pump of the utility model;

Fig. 3 is the structural representation of a kind of rotor oil pump of the utility model.

Embodiment

In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Embodiment

With reference to figure 1, Fig. 2, Fig. 3, a kind of rotor oil pump, comprise the pump housing 1, external rotor 2, internal rotor 3, pump shaft 4 and pump cover 5, in the described pump housing 1, be provided with a groove and the airtight formation rotor chamber of pump cover 5 body 6, rotor cavity 6 is connected with oil inlet hole 7 and oil outlet 8, described external rotor 2 and internal rotor 3 are nested in rotor cavity 6, external rotor 2 is intermeshing and be eccentric structure with internal rotor 3, the tooth trace of described internal rotor 3 is the conjugation of circle, described pump shaft 4 runs through in the shrinkage pool that the pump housing 1 inserts pump cover 5, in the middle of described pump shaft 4, be provided with straight pin 9, pump shaft 4 drives internal rotor 3 to rotate by straight pin 9.

The bolt 10 that the pump housing 1 and pump cover 5 arrange by three annulars closely cooperates, and is provided with the pad 11 that fish paper is made between the pump housing 1 and pump cover 5, ensures the sealability of rotor cavity 6, prevents leakage of oil.

On the pump housing 1 and pump cover 5, correspondence is provided with two locating studs 12, is convenient to install.

Internal rotor 3 has the double wedge of four, and the recessed number of teeth of external rotor 2 is five, the nonsynchronous in the same way rotation of inner and outer Rotator like this, and the gabarit pattern curve of rotor is trochoid.Internal rotor is fixed on rotor shaft with key or pin, directly or indirectly driven by crankshaft gear, the throw of eccentric at internal rotor 3 and external rotor 2 centers is e, internal rotor 3 drives external rotor to rotate in the same direction together, when rotor tooth form tooth Profile Design must make rotor forward any angle to, on the profile of tooth profile of the each tooth of inner and outer Rotator, total energy becomes mutually some contact.Between inner and outer Rotator, form like this 4 active chambers, along with the rotation of rotor, the volume of these 4 active chambers is constantly to change.At a side cavity of oil input channel, because rotor is thrown off engagement, volume increases gradually, produce vacuum, machine oil is inhaled into, and rotor continues rotation, machine oil is brought to a side of oil road, and at this moment, rotor just in time enters engagement, this cavity volume is reduced, oil pressure raises, and machine oil is extruded and goes out through oil road force feed between cog, like this, along with the continuous rotation of rotor, machine oil is just constantly inhaled into and extrudes.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a rotor oil pump, comprise the pump housing (1), external rotor (2), internal rotor (3), pump shaft (4) and pump cover (5), it is characterized in that: in the described pump housing (1), be provided with a groove and pump cover (5) airtight formation rotor chamber body (6), rotor cavity (6) is connected with oil inlet hole (7) and oil outlet (8), described external rotor (2) and internal rotor (3) are nested in rotor cavity (6), external rotor (2) and internal rotor (3) are intermeshing and be eccentric structure, the tooth trace of described internal rotor (3) is the conjugation of circle, described pump shaft (4) runs through in the shrinkage pool of the pump housing (1) insertion pump cover (5), in the middle of described pump shaft (4), be provided with straight pin (9), pump shaft (4) drives internal rotor (3) to rotate by straight pin (9).

2. a kind of rotor oil pump according to claim 1, is characterized in that: the bolts (10) that the described pump housing (1) and pump cover (5) arrange by three annulars closely cooperate, and are provided with the pad (11) that fish paper is made between the pump housing (1) and pump cover (5).

3. a kind of rotor oil pump according to claim 1, is characterized in that: the upper correspondence of the described pump housing (1) and pump cover (5) is provided with two locating studs (12).

4. a kind of rotor oil pump according to claim 1, is characterized in that: described internal rotor (3) has four or more double wedge, many one of the tappet number of the recessed gear ratio internal rotor of external rotor (2).