CN1358927A

CN1358927A - Lubricant pump for internal combustion engine

Info

Publication number: CN1358927A
Application number: CN 01140353
Authority: CN
Inventors: 黑木正宏; 轮违薰
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2000-12-11
Filing date: 2001-12-10
Publication date: 2002-07-17
Anticipated expiration: 2021-12-10
Also published as: CN1254603C; JP4518662B2; JP2002180974A

Abstract

The invention facilitates the disposition of an oil passage by a simple structure in a lubricating oil pump for an internal combustion engine, in particular for a small-size internal combustion engine. This oil pump has a pump chamber 3 for storing a pump rotor in its inside is formed of a pump case 1 and a pump plate 2 and an oil channel chamber 14 cut off from the pump chamber 3 is provided adjacent to the oil passage chamber 14.

Description

The internal-combustion engine oil pump

Technical field that the present invention belongs to

The present invention relates to internal-combustion engine, particularly about the lubricant oil pump structure of compact internal combustion engine.

Background technique

The oil pump of internal-combustion engine in the past for example has, and Japan opens the structure shown in the clear 61-63492 communique in fact.This oil pump independently is provided with common monomer, by crankcase to bent axle or connecting rod tip, first-class distribution oil.

Under the situation in oil pump is disposed at internal-combustion engine, consider other oily path, therefore, oil pump is configured in the position of avoiding these oily paths.On the contrary, need walk around oil pump oily path is set.

Therefore, oily path complexity, internal-combustion engine maximizes.That is to say that under the situation of oily channel setting in walls such as crankcase or cylinder body, if oily path complications etc., it is very difficult only in the withdrawing pattern direction of die casting etc. the hole being set, and must raise expense with oilhole as machining hole.

In order to solve above-mentioned problem in the past, the invention of claim 1 record is the oil pump about internal-combustion engine, and this oil pump forms the pump chamber that inside accommodates pump rotor by pump casing and pump end plate, simultaneously, be provided with this pump chamber in abutting connection with and the oily path chamber that cuts off with this pump chamber.Therefore, can shorten oily path disposing oil pump according to the invention of claim 1 record with oily path position overlapped.

The invention of claim 2 record, in the invention of claim 1 record, above-mentioned oily path chamber is at the said pump end plate and be disposed between the enclosing cover of this pump end plate foreign side and form.Therefore, according to the invention of claim 2 record,, also can not make the structure complicated of oil pump even be provided with the oily path that cuts off with pump chamber.

In addition, the invention of claim 3 record, in the invention of claim 1 record, above-mentioned oily path is provided with a plurality of oil exports in the chamber.Thereby, according to the invention of claim 3 record,, be easy to carry out the distribution of oil by the oily path chamber of oil pump.

Moreover, the invention of claim 4 record, in the invention of claim 1 record, the said pump rotor is made of internal rotor and external rotor, this internal rotor and bent axle arranged coaxial, and, simultaneously, be provided with the oily path that in bent axle, extends by crank-driven.Therefore,, can simplify the driving structure of oil pump according to the invention of claim 3 record, and then, be easy to carry out concurrently to the fuel feeding of bent axle with to the fuel feeding of other parts.

Brief description of drawings

Fig. 1 is the longitudinal plane side view (I-I of Fig. 4, Fig. 5, Fig. 6 is to looking sectional view) of the oil pump of an embodiment of the present invention.

Fig. 2 is the plan view (II-II of Fig. 4, Fig. 5, Fig. 6 is to looking sectional view) of the longitudinal plane of Fig. 1.

Fig. 3 is the profile diagram (III-III of Fig. 4, Fig. 5, Fig. 6 is to looking sectional view) of Fig. 1.

Fig. 4 is that the IV-IV of Fig. 1, Fig. 2, Fig. 3 is to looking cross-section profile.

Fig. 5 is that the V-V of Fig. 1, Fig. 2, Fig. 3 is to looking cross-section profile.

Fig. 6 is that the VI-VI of Fig. 1, Fig. 2, Fig. 3 is to looking cross-section profile.

Fig. 7 is the concept map from the lubricating system of IC engine part that comprises above-mentioned oil pump of crankshaft center line direction observation.

Fig. 8 is unfolded drawing 7 and the concept map from observing perpendicular to the crankshaft center line direction.

The working of an invention form

Fig. 1 is the longitudinal plane side view (I-I of Fig. 4, Fig. 5, Fig. 6 is to looking sectional view) of the oil pump of an embodiment of the present invention, Fig. 2 is the plan view (II-II of Fig. 4, Fig. 5, Fig. 6 is to looking sectional view) of the longitudinal plane of Fig. 1, Fig. 3 is the profile diagram (III-III of Fig. 4, Fig. 5, Fig. 6 is to looking sectional view) of Fig. 1, Fig. 4 is that the IV-IV of Fig. 1, Fig. 2, Fig. 3 is to looking cross-section profile, Fig. 5 be the V-V of Fig. 1, Fig. 2, Fig. 3 to looking cross-section profile, Fig. 6 is that the VI-VI of Fig. 1, Fig. 2, Fig. 3 is to looking cross-section profile.

At first, as shown in Figure 1 to Figure 3, pump casing 1 and pump end cap 2 form pump chamber 3, as shown in Figure 5, in this pump chamber 3, accommodate the external rotor 4 and the internal rotor 5 that has the external tooth that meshes with this internal tooth of band internal tooth.The few tooth of the number of teeth of the gear ratio external rotor 4 of internal rotor 5.In addition, external rotor 4 is eccentric mutually with the spin axis of internal rotor 5.Internal rotor 5 can not be embedded in rotationally with the coaxial hollow actuating shaft that combines 6 of bent axle described later on.

As Fig. 1 and shown in Figure 4, on pump casing 1, be provided with suction port 7 and exhaust port 8, this suction port 7 and exhaust port 8 are remained silent in above-mentioned pump chamber 3.Suction port 7 is communicated with suction port 9, and exhaust port 8 is communicated with exhaust port 10.11, the 12nd, locating stud.So, constitute trochoid pump by the parts shown in the symbol 1 to 12.

In this form of implementation, the foreign side's configuration enclosing cover 13 at pump chamber 3 forms oily path chamber 14 between enclosing cover 13 and pump chamber 3.The 15th, be used for fixing the spring ring of enclosing

cover

13,16 is zero shape circles.

In addition, said pump shell 1 is provided with oily path chamber inlet 17, two oily

path chamber outlet

18a, 18b and oily path chamber inlet path 19 that is communicated with oily path chamber inlet 17 respectively and oily path chamber exit passageway 20a, the 20b that is connected with oily path chamber outlet 18a, 18b.Oil path chamber inlet path 19 and oily path

chamber exit passageway

20a, 20b connect the pump end plate 2 and the above-mentioned oily path chamber 14 that breaks.In addition, the hollow portion 6a of live axle 6 also is communicated with oily path chamber 14 by the groove 2a of pump end plate 2 central parts.

Then, Fig. 7 is the concept map from the lubricating system of IC engine part that comprises above-mentioned oil pump of crankshaft center line direction observation, and Fig. 8 is unfolded drawing 7 and the concept map from observing perpendicular to the crankshaft center line direction.

At first, in Fig. 7, the suction port 9 of oil pump 30 is communicated with by suction line 33 with the strainer 32 that is configured in crankcase 31 bottoms.The exhaust port 10 of oil pump 30 is communicated with the inlet of oil strainer 35 by drain passageway 34.And the outlet of oil strainer 35 is communicated with the oily path chamber inlet 17 of oil pump 30 by current return circuit 36.The outlet of the oily path chamber of oil pump 30 18a, 18b lead to the axle, head 41 etc. of main shaft 39, the suction booster 40 of clutch 38 respectively by

oily path

37a, 37b, 37c, 37d etc.

Then, in Fig. 8, the hollow portion 6a of the live axle 6 of oil pump 30 and the internal communication of bent axle 42.Any one that is used for the current return circuit 36 that the main shaft 39 of above-mentioned oil strainer 35, clutch 38, head 41 etc. and oil pump 30 are communicated with,

oily path

37a, 37b, 37c, 37d etc. all is arranged in the wall of crankcase 31 or cylinder body 43.

In addition, the symbol 29 among Fig. 7 is fitting surfaces of housing, also is the parting plane of metal pattern.Suction line 33, oily path 37a etc. form on this fitting surface 29, and drain passageway 34, current return circuit 36,

oily path

37b, 37c, 37d etc. form on the direction perpendicular to this fitting surface 29.

In above-mentioned oil pump 30, when live axle 6 drives by bent axle 42, internal rotor 5 rotations, further external rotor 4 rotations, under the effect of this pump, the lubricant oil that is stored in the oil groove of crankcase 31 bottoms sucks from suction port 9, suction port 7 through strainer 32, suction line 33, and discharges to exhaust port 8, exhaust port 10.The lubricant oil of discharging through drain passageway 34 to oil strainer 35, remove foreign matter here after, return oil pump 30 through current return circuit 36 again.Then, through in oily path chamber inlet 17, the oily path of the oily path chamber inlet path 19 guiding chamber 14.Lubricant oil in the oily path chamber 14 of guiding oil pump 30, from exporting 18a, 18b to oily path chamber through oily path

chamber exit passageway

20a, 20b here, pass through

oily path

37a, 37b, 37c, 37d again, the main shaft 39 of guiding clutch 38, the axle of suction booster 40, head 41 etc. are lubricated it.In addition, a part of lubricant oil in the oily path chamber 14 in the oily path in the guiding bent axle 42, resupplies the lubricated of crank pin, connecting rod, cylinder etc. through groove 2a, the hollow portion 6a of live axle 6 of pump end plate 2.

In this form of implementation,, therefore, can dispose oil pump 30 with oily path position overlapped, and then shorten oily path owing to be provided with and pump chamber 3 adjacency of oil pump 30 and the oily path chamber 14 that cuts off with this pump chamber 3.In addition, above-mentioned oily path chamber 14 is at pump end plate 2 and be configured between the enclosing cover 13 of these pump end plate 2 foreign sides and form.Therefore, can not make the structure complicated of oil pump 30, almost can not make size become big.

In addition, in this form of implementation, owing to be provided with the outlet of a plurality of

oily paths chamber

18a, 18b in the oily path chamber 14, thereby, be easy to be lubricated the distribution of oil.Moreover, in this form of implementation, because the live axle 6 and bent axle 42 coaxial combinations of internal rotor 5, thereby, can simplify the driving structure of oil pump 30.In addition, because the hollow portion 6a of the live axle 6 groove 2a by pump end plate 2 central parts is communicated with oily path chamber 14, simultaneously, also the middle part with bent axle 42 is communicated with, thereby, can carry out simultaneously at an easy rate to the fuel feeding of bent axle 42 and to the fuel feeding of other parts.

In addition, in this form of implementation, owing to reduced the complications of the oily path in the walls such as being arranged at crankcase 31 or cylinder body 43, thereby the overwhelming majority of oilhole is a die casting withdrawing pattern structure, does not need reprocessing.

Also have, in this form of implementation, because big heavy wool path forms on the fitting surface 29 of housing, perhaps form in the direction vertical with this fitting surface 29, therefore, when shell cast is shaped, a plurality of oily paths are shaped, utilize this point, can omit the machining of the oily path of relative housing.

Claims

1, a kind of oil pump of internal-combustion engine is characterized in that, this oil pump forms the pump chamber that inside accommodates pump rotor by pump casing and pump end plate, simultaneously, be provided with this pump chamber in abutting connection with and the oily path chamber that cuts off with this pump chamber.

According to the oil pump of the internal-combustion engine of claim 1 record, it is characterized in that 2, described oily path chamber is at described pump end plate and be disposed between the enclosing cover of this pump end plate foreign side and form.

3, according to the oil pump of the internal-combustion engine of claim 1 record, it is characterized in that described oily path is provided with a plurality of oil exports in the chamber.

4, according to the oil pump of the internal-combustion engine of claim 1 record, it is characterized in that described pump rotor is made of internal rotor and external rotor, this internal rotor and bent axle arranged coaxial, and, simultaneously, be provided with the oily path that in bent axle, extends by crank-driven.