CN2652724Y

CN2652724Y - End face oil intake mechanism for vehicle air compressor

Info

Publication number: CN2652724Y
Application number: CN 200320111019
Authority: CN
Inventors: 肖海燕; 刘黔; 张金平; 杨张黔; 刘秀英
Original assignee: MEILIAN BRAKE DEVICE CO Ltd LANGFANG
Current assignee: MEILIAN BRAKE DEVICE CO Ltd LANGFANG
Priority date: 2003-10-10
Filing date: 2003-10-10
Publication date: 2004-11-03
Anticipated expiration: 2013-10-10

Abstract

The utility model relates to an end face oil intake mechanism for vehicle air compressors, which belongs to the positive-displacement mechanical technical field to solve the problems of heavy brass abrasion and large oil leak amount. A sliding bearing is changed into a rolling bearing; a plunger piston is arranged in a rear cap of which the inner chamber and the plunger piston forms sealed fit; an oil hole is arranged in the plunger piston which and the end surface of the bent axle forms sliding sealed fit with the function of a pressure mechanism. The plunger piston is a cone of which middle oil hole is connected with the inner chamber, and the cone is contacted with a round wire or a narrow annulus belt formed by the bent axle end surface. Compared with the original technique, the utility model can control efficiently the amount of the oil intake of the air compressor, reduces the amount of the oil pumping, increases the operational reliability, and can be widely used in various bent axle vehicle air compressors without rear end output.

Description

A kind of automobile-used Air compressor end face oil-feed mechanism

Technical field

The utility model relates to a kind of improved Air compressor lubricating system, especially relates to the end face oil-feed mechanism of automobile-used Air compressor, belongs to the transfiguration field of mechanical technique.

Background technology

In existing Air compressor lubricating system, crankshaft end-face lubricated is that the fuel feed hole with machine oil is arranged on the bonnet, the crankshaft rear end supporting is sliding bearing, make the bearing hole on bonnet, plain bearing, bent axle, the crankcase form a sealed chamber like this, crankshaft rear end is drilled with oilhole, other lubricant housings of this oilhole and bent axle communicate, lubricating oil with pressure enters sealed chamber by fuel feed hole, and by the oilhole on the bent axle to each lubricant housings, such typical mechanism is seen XC4110 type Air compressor.Its shortcoming is, back end bearing is because of adopting sliding bearing, and the gap of bearing shell and bent axle is that the tolerance by crankcase bush seat hole, liner wall thickness and crankshaft neck decides, and generally is 0.012 to 0.076 millimeter.When the diametral load of crankshaft front end big (as belt tension), then cause the inordinate wear of bearing shell, thereby the gap is further increased, make the spillage of lubricating oil very big like this, when oil return is not smooth, cause lubricants capacity excessive, cause the Air compressor oil extraction.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the defective of prior art and provides a kind of bearing not easy to wear and loss of oil volume is less a kind of automobile-used Air compressor end face oil-feed mechanism.

Problem of the present utility model is realized by following technical scheme:

A kind of automobile-used Air compressor end face oil-feed mechanism, held with crankshaft oil passage by crankcase, bonnet, bent axle, rear trunnion and to form, be provided with fuel feed hole on the bonnet of crankcase, bonnet and crankcase driving fit are fixed, its improvements are that described rear trunnion holds the employing antifriction-bearing box; In the cover cavity of back a plunger is set, back cover cavity and plunger are for being sealed and matched; Be provided with an oilhole in the plunger, plunger forms the slip leakproof fit with crankshaft end-face under the effect of pressure mechanism.

Above-mentioned automobile-used Air compressor end face oil-feed mechanism, described plunger is a cone, and the oilhole in the middle of the cone is communicated with inner chamber, and cone forms round line with crankshaft end-face or narrow endless belt contacts.

Above-mentioned automobile-used Air compressor end face oil-feed mechanism, described pressure mechanism is a pressure spring.

The Air compressor end face oil-feed mechanism that provides according to the utility model, owing to change plain bearing into antifriction-bearing box in crankshaft end, thereby be difficult for causing the inordinate wear of each necked part, the leakage of lubricating oil is reduced.After the improvement, carrying is finished respectively by antifriction-bearing box and plunger with sealing, thereby makes plunger surface and back cover cavity be in the equal clearance state all the time, and this has reduced the leakage of lubricating oil greatly.Cone forms an annular arrangement broadband with crankshaft end-face under the pressure spring effect, thereby has increased sealing force, has further reduced the leakage of lubricating oil.

Description of drawings

Fig. 1 is the utility model end face oil-feed mechanism cutaway view;

Fig. 2 is the bent axle front view.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further details:

Consult accompanying drawing, the utility model is made up of bonnet 1, plunger 2, pressure spring 3, antifriction-bearing box 4, bent axle 5, crankcase 6 and crankshaft oil passage 7, wherein be provided with fuel feed hole 9 on bonnet 1, bonnet 1 is fixed with crankcase 6 driving fits, in crankshaft end antifriction-bearing box 4 is housed; Back cover cavity and plunger form a pressure sealing chamber.Their gap less (being generally the 0.02-0.061 millimeter), plunger 2 is a cone, and oilhole in the middle of the cone and inner chamber are logical, push plunger 2 to crankshaft end-face under the effect of pressure spring 3, thereby having increased sealing force, is the dynamic seal that keeps certain contact force between the both ends of the surface.Hole on the plunger communicates with crankshaft oil passage 7, and lubricating oil enters the pressure sealing chamber by bonnet fuel feed hole 9, and enters crankshaft oil passage 7 and arrive each lubricant housings through oilhole.7 ends at crankshaft oil passage have a steel ball 8 that oil duct 7 is blocked, and prevent oil leak.

Pressure spring promotion plunger 2 forms round line with crankshaft end-face or narrow endless belt contacts, and realizes dynamic seal.

The utility model is compared with original technology, can control the oil inlet quantity of Air compressor effectively, reduces the oil mass of scurrying of Air compressor, improves reliability of operation, and can be widely used in various bent axles does not have on the automobile-used Air compressor of rear end output.

Claims

1. automobile-used Air compressor end face oil-feed mechanism, form by bonnet (1), crankcase (6), bent axle (5), bearing (4) and crankshaft oil passage (7), wherein, on bonnet (1), be provided with fuel feed hole (9), bonnet (1) is fixed with crankcase (6) driving fit, it is characterized in that described bearing (4) is an antifriction-bearing box; At bonnet (1) inner chamber one plunger (2) is installed, back cover cavity and plunger are for being sealed and matched; Be provided with an oilhole in the plunger, plunger forms the slip leakproof fit with crankshaft end-face under the pressure mechanism effect.

2. automobile-used Air compressor end face oil-feed as claimed in claim 1 mechanism is characterized in that described plunger is a cone, and the oilhole in the middle of the cone is communicated with inner chamber, and cone forms round line with crankshaft end-face or narrow endless belt contacts.

3, automobile-used Air compressor end face oil-feed as claimed in claim 1 or 2 mechanism is characterized in that described pressure mechanism is a pressure spring (3).