CN201982944U

CN201982944U - Oil pump assembly

Info

Publication number: CN201982944U
Application number: CN2010205835974U
Authority: CN
Inventors: 史祥龙; 孔继军
Original assignee: NANJING INNOVATION LUBRICATING OIL PUMP MANUFACTURING Co Ltd
Current assignee: NANJING INNOVATION LUBRICATING OIL PUMP MANUFACTURING Co Ltd
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2011-09-21
Anticipated expiration: 2020-10-29

Abstract

The utility model discloses an oil pump assembly, which comprises a rotor shaft, a pump body and a pump cover, wherein the pump cover is sleeved at the bottom end of the pump body, a rotor cavity is arranged in the pump body, pump shaft support holes are formed on the pump cover and the pump body, and the rotor shaft penetrates into the support holes with one end inserted into the pump cover and the other end penetrating through the rotor cavity to be connected with a gear of the oil pump; an inner rotor and an outer rotor which are meshed and eccentrically mounted in the inner cavity of the pump body through the rotor shaft are also arranged in the rotor cavity, wherein the inner rotor is fixedly sleeved on the rotor shaft, and the outer rotor is sleeved on the inner rotor in a clearance way; and an oil inlet cavity with an oil inlet and an oil outlet cavity with an oil outlet are arranged on the pump cover. The oil pump assembly is characterized in that the height of the rotor cavity ranges from 20 to 25cm, the heights of the inner rotor and the outer rotor range from 20 to 25cm, and the gear of the oil pump is connected with the rotor shaft through a woodruff key. The oil pump has a service life of 1 year, internally has a flow rate improved by 8 % as compared with an ordinary oil pump, and is more convenient to assemble, and the motor is more convenient to dismount and repair.

Description

Engine oil pump assembly

Technical field

The utility model relates to the motor oil Pump For Machine assembly, relates in particular to the YZ485 type engine oil pump assembly that a kind of motor is used.

Background technique

Because it is more and more higher that present motor requires, the sae number to oil pump requires more and more higher simultaneously.At present, engine oil pump mainly contains two types of gear type and rotor-type oil pumps.Rotor-type oil pump, comprise the pump housing, pump cover, rotor shaft, inner and outer rotors, on the pump housing, have the rotor chamber that inner and outer rotors is set, internal rotor is connected on the rotor shaft by pin, and the turnover oil pocket of opening on the pump cover surface relative with rotor chamber communicates with the turnover oilhole on pump housing surface by the oil circuit that passes pump cover, the pump housing respectively.These two kinds of oil pump capacities are all less, can not satisfy user's demand.

Summary of the invention

The technical problems to be solved in the utility model is that existing oil pump capacity is too small, can not satisfy the lubricating requirement of oil pump.

For solving the problems of the technologies described above, the technological scheme that the utility model adopted is: a kind of engine oil pump assembly comprises rotor shaft, the pump housing and pump cover; Pump cover is enclosed within pump housing bottom, is provided with rotor chamber in the pump housing, and the pump cover and the pump housing are provided with the pump shaft bearing hole, and described rotor shaft is through in the bearing hole, and the one end inserts pump cover, and the other end is connected with an oil pump gear after passing rotor chamber; Also be provided with in the rotor chamber and be installed in the pump housing inner chamber and intermeshing internal rotor and external rotor by rotor shaft off-centre, wherein, the internal rotor socket is fixed on the rotor shaft, and the external rotor gap is socketed on the internal rotor; Pump cover is provided with the oil suction chamber of bringing hydraulic fluid port into and takes the oil pocket that of hydraulic fluid port out of; It is characterized in that: described rotor chamber height is 20-25cm, and the height of internal rotor and external rotor is 20-25cm, and described oil pump gear is connected with rotor shaft by woodruff key.

By increasing the inside and outside rotor in oil pump height, increase the degree of depth of rotor chamber simultaneously, improve the flow of oil pump, and use woodruff key that the rotatory force that crankshaft gear revolves is passed to rotor shaft by oil pump gear, can reach centering well, effect such as easy to assembly.

As a kind of improvement project of the present utility model, the outer wall of described pump housing inner chamber is the hi-Fix axle.Because the outer wall that the installing and locating mode of described engine oil pump assembly adopts pump housing inner chamber as the hi-Fix axle, is convenient to be installed in the diesel-engine body and is used.

As another kind of improvement project of the present utility model, also be provided with corresponding locking hole and lock bolt on the pump cover and the pump housing.Pass screw locking oil pump by bolt, engine oil pump assembly is fixed on the motor, improved the gear meshing precision, and engine oil pump assembly carries gear (being oil pump gear), the installation procedure of the motor of minimizing is convenient for changing oil pump simultaneously.

For further reducing the final assembly requisite space, be provided with circlip between described rotor shaft and the pump cover upper support hole, use the spacing fixed structure compactness of circlip.

The utility model has the advantages that: oil pump long service life 1 year, flow-rate ratio common machine oil pump improves 8% in the oil pump, and the dismounting of the assembling of oil pump and motor and keep in repair convenient.

Description of drawings

Fig. 1 is the sectional view of engine oil pump assembly;

Fig. 2 is the pump body structure schematic representation;

Fig. 3 is the engine oil pump assembly plan view;

Fig. 4 is that the local B-B of Fig. 3 is to sectional view;

Fig. 5 is the pump cover structural representation.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Shown in Fig. 1 to 5, shown in engine oil pump assembly be YZ485 type engine oil pump assembly, the pump housing 1 is connected by locating stud 15 with pump cover 2, on the pump housing 1, have the rotor chamber that inner and outer rotors is set, internal rotor 4 is connected on the rotor shaft 3, opens at the oil suction chamber 5 on the pump cover relative with rotor chamber 2 surfaces to communicate with oil inlet hole 7 in the pump housing 1 by oil circuit in pump cover 6; The oil pocket of opening on the pump cover relative with rotor chamber 2 surfaces 8 that goes out communicates with oil outlet 10 in the pump housing 1 by the oil circuit in pump cover 29.Rotor shaft 3 passes the main bearing hole 11 that the auxilliary bearing hole 12 on the pump cover 2 has to the pump housing.By the woodruff key on the rotor shaft 13 rotating power that crankshaft gear passes to oil pump gear 14 is passed to rotor shaft 3, make inside and outside rotor carry out nonsynchronous in the same way rotation.The rotor chamber height is 20-25cm, and the height of internal rotor and external rotor is 20-24.5cm.By being stuck in circlip 15 on the rotor shaft 3, having limited oil pump gear 14 and axially moved.When engine oil pump assembly was installed on the motor, the outer wall 16 that adopts pump housing inner chamber was installed in the diesel-engine body as the hi-Fix axle, passed screw locking oil pump by bolt 17, was fixed on the motor, had improved the gear meshing precision.Described internal rotor 4 and external rotor 17 have throw of eccentric 2.8cm, and internal rotor 4 is different with the number of teeth on the external rotor 17; Internal rotor 4 has 4 teeth, and external rotor 17 has 5 teeth, and inner and outer rotors is done nonsynchronous in the same way rotation.

Claims

1. engine oil pump assembly comprises rotor shaft, the pump housing and pump cover; Pump cover is enclosed within pump housing bottom, is provided with rotor chamber in the pump housing, and the pump cover and the pump housing are provided with the pump shaft bearing hole, and described rotor shaft is through in the bearing hole, and the one end inserts pump cover, and the other end is connected with an oil pump gear after passing rotor chamber; Also be provided with in the rotor chamber and be installed in the pump housing inner chamber and intermeshing Inner rotor and external rotor by rotor shaft off-centre, wherein, the internal rotor socket is fixed on the rotor shaft, and the external rotor gap is socketed on the internal rotor; Pump cover is provided with the oil suction chamber of bringing hydraulic fluid port into and takes the oil pocket that of hydraulic fluid port out of; It is characterized in that: described rotor chamber height is 20-25cm, and the height of internal rotor and external rotor is 20-25cm, and described oil pump gear is connected with rotor shaft by woodruff key.

2. engine oil pump assembly according to claim 1 is characterized in that: the outer wall of described pump housing inner chamber is the hi-Fix axle.

3. engine oil pump assembly according to claim 1 and 2 is characterized in that: also be provided with corresponding locking hole and supporting lock bolt on the pump cover and the pump housing.

4. engine oil pump assembly according to claim 1 and 2 is characterized in that: described internal rotor and external rotor have throw of eccentric, and internal rotor is different with the number of teeth on the external rotor; Inside and outside rotor is done nonsynchronous in the same way rotation.

5. engine oil pump assembly according to claim 4 is characterized in that: internal rotor has 4 teeth, and external rotor has 5 teeth.

6. engine oil pump assembly according to claim 1 and 2 is characterized in that: be provided with circlip between described rotor shaft and the pump cover upper support hole.