CN2413061Y

CN2413061Y - Inside engaged cycloidal gear pump

Info

Publication number: CN2413061Y
Application number: CN 00216717
Authority: CN
Inventors: 陈杰余
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-06
Filing date: 2000-03-06
Publication date: 2001-01-03
Anticipated expiration: 2010-03-06

Abstract

The utility model discloses an inside engaged cycloidal gear pump, particularly an inside engaged cycloidal gear pump used in a lubrication system of an internal combustion engine with small power. The inside engaged cycloidal gear pump comprises a disk type inner concave pump body, and an inner and outer rotors and a shaft are respectively arranged inside the pump body; an oil distribution disk is sheathed on the shaft and connected to the pump body, and a pressure regulating washer is arranged between the oil distribution disk and the pump body. When the utility model is used, an internal combustion engine drives the shaft to force the inner and the outer rotors to rotate so as to suck lubrication and output pressure oil. The utility model solves the problem of oil leakage originally, regulates output oil pressure by regulating the thickness of the pressure regulating washer, and has the advantages of simple structure and low cost.

Description

Engagement cycloid gear pump in a kind of

It is the interior engagement cycloid gear pump that uses in the small-power lubricating system of IC engine that the utility model relates to a kind of interior engagement cycloid gear pump ， Te Do.

The interior engagement cycloid gear pump that in the lubrication system of small-power internal-combustion engine, uses at present, generally form by the pump housing, pump cover, internal rotor, external rotor and oil distribution casing, the oil distribution casing and the pump housing are made one, and be positioned at the inner side surface of the pump housing, and pump cover is connected the outer side surface of the pump housing, and the flank profil of inside and outside rotor is a cycloid, internal rotor is fixed on the axle, and be contained in the external rotor, a throw of eccentric is arranged between the inside and outside rotor, axle is fixed on oil distribution casing and the pump cover.During use, the inner side surface of the pump housing is connected with internal-combustion engine, and axle is by internal combustion engine drive, axle drives inside and outside rotor rotation, can suck lubricant oil from the filler opening of oil distribution casing, again through boosting after from the oil outlet pressure oil output of oil distribution casing, to lubricate the moving element of internal-combustion engine.The deficiency of this class pump is: one owing to the sealing between the pump housing and the pump cover is realized by screw and packing ring, in use because of the damage of loosening, the packing ring of screw or the pump housing and pump cover two surface of contact out-of-flatnesses oil leakage phenomenon often takes place, the phenomenon generation that seriously damages internal-combustion engine because of leakage of oil is also arranged; Two because oil distribution casing and the pump housing are made one, the gap of oil outlet can not be changed and cause that output oil pressure is unadjustable.

The purpose of this utility model provides a kind of interior engagement cycloid gear pump, and it has the advantage that oil pressure is adjustable and simple in structure, cost is low of no leakage of oil, output.

For achieving the above object, the utility model comprises the pump housing, internal rotor, external rotor, axle and oil distribution casing, in, the flank profil of external rotor is a cycloid, internal rotor is positioned at external rotor, and be fixed on the axle the centre, in, one throw of eccentric is arranged between the external rotor and be contained in the pump housing, the pump housing is that dish type is inner concavity, one end of axle is installed in the interior hole of the pump housing, oil distribution casing is housed on the other end, and oil distribution casing is connected on the pump housing by screw, and a pressure regulation packing ring is housed between the surface of contact of the oil distribution casing and the pump housing, regulate fuel-displaced gap length by the thickness of regulating the pressure regulation packing ring, to regulate output oil pressure.In the use, the internal combustion engine drive axle rotates, and axle drives inside and outside rotor rotation, volume between the inside and outside rotor flank profil is constantly changed, formation sucks lubricant oil from the inlet port of oil distribution casing, from the oil outlet pressure oil output of oil distribution casing, realizes lubricating the internal-combustion engine moving element after supercharging.

The utility model has both saved original pump cover and packing ring because the pump housing is made the dish type inner concavity, has solved the problem of leakage of oil again; Owing between the surface of contact of the oil distribution casing and the pump housing, increased by a pressure regulation packing ring,, solved the adjustable problem of output oil pressure again by the thickness fork-like farm tool used in ancient China change oil distribution casing of adjustment pressure regulation packing ring and the end clearance between the pump housing.In addition, because the improvement of said structure significantly decreases material and processing cost, its structure is simple more, reasonable.

Provide embodiment of the present utility model and accompanying drawing below, and be described further in conjunction with the accompanying drawings:

Fig. 1 is a main sectional view of the present utility model;

Fig. 2 is a left view of the present utility model.

By shown in Figure 1, internal rotor 5 is positioned at external rotor 3, and is fixed on the centre of axle 6 by pin 7, and inside and

outside rotor

5,3 is contained in the pump housing 1.The pump housing 1 is inner concavity for dish type, an axle end of 6 is installed in the hole in the pump housing 1, the other end is equipped with oil distribution casing 4, one pressure regulation packing ring 2 is housed between the surface of contact of the oil distribution casing 4 and the pump housing 1, regulate end clearance between oil distribution casing 4 and the pump housing 1 by the thickness of regulating pressure regulation packing ring 2, with the adjusting output oil pressure.During use, internal combustion engine drive axle 6 rotates, axle 6 drives internal rotor 5, external rotor 3 rotates, volume between inside and

outside rotor

5,3 flank profils is constantly changed, formation sucks lubricant oil from the inlet port 10 of oil distribution casing 4, after supercharging,, the internal-combustion engine moving element is lubricated from oil outlet 11 pressure oil output of oil distribution casing 4.

By shown in Figure 2, oil distribution casing 4 is fixed on the pump housing 1 by four screws 8 and locating stud 9.One throw of eccentric 12 is arranged between the inside and outside rotor.

Claims

1. mesh cycloid gear pump in one kind, comprise the pump housing (1), internal rotor (5), external rotor (3), axle (6) and oil distribution casing (4), in, external rotor (5), (3) flank profil is a cycloid, internal rotor (5) is positioned at external rotor (3), and by pin (7) be fixed on the axle (6) the centre, in, external rotor (5), one throw of eccentric is arranged (3) and be contained in the pump housing (1), it is characterized in that: the pump housing (1) is inner concavity for dish type, one end of axle (6) is installed in the interior hole of the pump housing (1), be contained in oil distribution casing (4) on the other end, oil distribution casing (4) is by screw (8), locating stud (9) is fixed on the pump housing 1.

2. according to the described a kind of interior engagement cycloid gear pump of claim 1, it is characterized in that: a pressure regulation packing ring (2) is housed between the surface of contact of the oil distribution casing (4) and the pump housing (1).