CN2654870Y - Lubricating structure in cylinder for reciprocating piston-type engine - Google Patents

Abstract

The utility model relates to a new type cylinder lubrication structure of the reciprocating piston engine, which comprises a cylinder body and a piston, and is characterized in that the piston is coaxially fixed piston bush and the outer wall is in the form of a bright cylinder, a plurality of piston sealing rings are arranged on the upper end and the lower end of the piston for partitioning the lubrication oil and the fuel oil, the oil storage groove is arranged along the ring wall on the place between the displacement dead points of the piston sealing rings on the upper end and the lower end of the piston on the cylinder internal wall, the oil storage groove is connected separately with the oil feed pipe and the oil return pipe on the oil distribution plate on the cylinder external wall through the oil feed hole and the oil return hole. By adopting the structure, the air tightness of the piston and the cylinder body is best, the lubrication oil and the fuel oil can be completely partitioned and the lubrication oil is smoothly flowed in and out of the cylinder convenient for recovery and circulating lubrication. The utility model has the advantages of rational integral structure, best heat conduction, thus effectively decreasing the internal friction and prolonging the service life.

Description

Novel lubricating structure in the cylinder of conventional engine

(1) technical field:

The utility model relates to novel lubricating structure in the cylinder of improvement structure, particularly conventional engine of the cylinder body of conventional engine and piston.

(2) background technique:

In used conventional engine, internal-combustion engine, lubricating between its movable friction means, especially piston and cylinder body is an extremely headachy problem always, and this problem especially shows on the two-stroke conventional engine.Initial people adopt to penetrate into lubricant oil in the fuel oil by a certain percentage, implement lubricated scheme when entering work done in the cylinder with miscella, consequently known, not only lubrication effect is limited, and because of lubricant oil can not be with fuel oil perfect combustion, just be mixed in and be discharged from outside the cylinder befouling environment in the waste gas.In cylinder, fail the thoroughly lubricant oil of burning, also easily form carbon deposit and burnt shape sediments, attached in the firing chamber and on the spark plug, both wasted power, influence the complete machine service behaviour, also can quicken component wear, the working life of shortening complete machine; The lubricated scheme of the improved so-called separated type in back, be not to be the separation of essence yet, just utilize the variation of oil dropping pump according to engine speed, quantitatively lubricant oil is splashed in the Carburetor and mix with fuel oil, with to implementing to lubricate with each friction means in the cylinder, though its effect is better than raw mode, but still undesirable,, tail gas oily as still flowing on the relief opening emits blue cigarette, and the problem of carbon deposit also fails to solve in the cylinder; Recently some producers adopt and accurately control lubricant oil with micro computer and splash in the Carburetor and mix the burning quality of the lubricated and fuel oil of the component in the assurance machine with fuel oil mutually.Though this can alleviate the pollution of institute's exhaust gas discharged to environment greatly, need to increase the cost input, particularly the quality requirements to used lubricant oil has reached the racing car level, and this can't popularize in reality.Say that more known conventional engine, internal-combustion engine do not belong to and patrol the ring lubricating structure, enter lubricant oil in the cylinder and can't reclaim and patrol ring and use, can't in time remove, just will inevitably influence the working life of motor quench end and foreign material of the metal in the cylinder.

(3) model utility content:

The purpose of this utility model to the public provide a kind of lubricant oil directly can be sent in the cylinder inside wall of cylinder and piston are applied lubricated, and can not allow lubricant oil enter in the firing chamber and crankcase in the interior lubricating structure of novel conventional engine cylinder that mixes with fuel oil.

This novel lubricating structure is comprising cylinder body and piston, different is, the cylindrical piston of outer side wall is fitted in the cylinder body, the intermediate journal of the bearing pin in the pin shaft hole on the little head end of piston rod and the pin shaft hole that is fitted in piston bushing is equipped mutually, the shaft axis of bearing pin and the shaft axis of piston bushing are perpendicular, piston bushing is in the inner chamber that the concentric wire is packed in piston, be equipped with piston packing ring in the piston ring groove of on the upper tip of cylindrical piston outer wall and lower end position, offering, in order to stop lubricant oil between piston outer wall face and inboard wall of cylinder block to overflow and to prevent that fuel oil from sneaking into, and the upper end of the piston on inboard wall of cylinder block piston ring groove is moved to lower dead center, piston ring groove position, piston lower end is to the position between the top dead center, peripheral wall is being laid the trapped fuel groove, oil inlet hole and spill port that the pass-out casing wall of offering on the trapped fuel groove is outer, respectively be installed in outer wall of cylinder block on oil distribution casing in in-line and the return line laid be connected, be hinged with oil inlet pipe and return tube respectively on in-line port on the oil distribution casing and the return line port.

In this novel cylinder in the lubricating structure, on the outer wall of bright and clean cylindrical piston, except the piston ring groove that must offer, there are not other hole, groove, hole again, tightness between piston outer wall and inboard wall of cylinder block is good, the overall thermal dilatancy is more even, the destabilizing factor in its thermal distortion more easy to control; The side wall surface of piston can be all the time with the inboard wall of cylinder block face on the trapped fuel groove and close the oil circuit that forms driving fit, guarantee lubricant oil in cylinder into and out of smooth and easy, this facilitates enforcement, and that ring is patrolled in the recovery of lubricant oil and realization is lubricated; In addition, the faying surface of piston and cylinder body is big, is beneficial to the transmission of heat in the work, and pressure is little between piston and cylinder body, can improve the adhesion of oil film on piston and cylinder body wall greatly, thus the friction between more effectively reducing mutually, the working life of prolongation motor.

(4) description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the form of the offering schematic representation of trapped fuel groove on the inboard wall of cylinder block.

(5) specific embodiments:

At columniform piston 2 and outer wall upper tip position, must offer the piston ring groove that equipped expansion piston ring is used by the requirement of prior art, but all need not offer the oilhole that radially is communicated with on the per pass piston ring groove, with regard to piston ring groove as the original device compression ring with piston 2 inner chambers.The piston ring groove of the equipped piston packing ring in the upper and lower end position then piston gas ring annular groove with commonly used is the same, and employed seal ring promptly is the compression ring that is commonly called as.Piston bushing 3 preferably with the little head end of piston rod 9 with bearing pin 5 equipped after, match with suitable gap again and pack in the inner chamber of piston 2, at place, the upper and lower position of the outer wall of piston bushing 3, can offer the twice annular groove, in order to equipped rubber ring 4, to come the lateral force of 2 in damper piston lining 3 and piston by rubber ring 4, limited piston 2 and 3 of piston bushinges produce relative rotation simultaneously.3 of piston bushinges can fixing device in the inner chamber of piston 2, but the most desirable, be that mode is to be installed in the circlip groove of offering on the piston 2 inner chamber wall positions of piston bushing 3 ear end faces with check ring 6 the most simply and easily again, deviate from from piston 2 inner chambers to prevent piston bushing 3.

The trapped fuel groove that peripheral wall is laid on cylinder body 1 inwall, should be on one of cylinder body 1 or more than one cross section, to be strip setting at interval, can be horizontal stripe at interval shape lay, or be slanted bar at interval shape offer, or front and back adjacent spaces slanted bar is the mutually topped shape of head and the tail and offers.Simultaneously, oil inlet hole that the oil distribution casing 7 that installs outward with cylinder body 1 wall on the trapped fuel groove is connected and spill port should be to be opened in respectively on two adjacent cross sections, and preferably on a cross section of cylinder body 1, be and offer oil inlet hole, and on another adjacent cross section, all be, so that the designing and producing of oil distribution casing 7 as spill port.The transverse shape of trapped fuel groove can be semicircle, also can be rectangle or be del, and the width of trapped fuel groove and the degree of depth and advance, the diameter of spill port, it is fixed all to be come by the diameter situation of piston.Trapped fuel groove on cylinder body 1 perisporium and advance, the laying situation of spill port also needs to determine according to the mode of putting of cylinder body 1, for example the vertically-arranged person can be on same cross section peripheral wall uniform, if horizontally-arranged or tilting person, then can with oil inlet hole and trapped fuel groove thereof wall many cloth in position above the medial axis, on the lower portion wall of medial axis few cloth, spill port and trapped fuel groove thereof then on the contrary the few cloth of position wall above the medial axis, on the lower portion wall of medial axis many cloth.Promptly need to arrange the length and the layout density of trapped fuel groove according to the characteristic that flows naturally of lubricant oil.

Claims (2)

1, novel lubricating structure in a kind of cylinder of conventional engine, comprise cylinder body (1) and piston (2), it is characterized in that: the cylindrical piston of outer side wall (2) is fitted in the cylinder body (1), the intermediate journal of the bearing pin (5) in the pin shaft hole on the little head end of piston rod (9) and the pin shaft hole that is fitted in piston bushing (3) is equipped mutually, the shaft axis of the shaft axis of bearing pin (5) and piston bushing (3) is perpendicular, piston bushing (3) is in the inner chamber that the concentric wire is packed in piston (2), be equipped with piston packing ring in the piston ring groove of on the upper tip of cylindrical piston (2) outer wall and lower end position, offering, piston (2) upper end piston ring groove on cylinder body (1) inwall is moved to lower dead center, piston (2) lower end piston ring groove is moved to the position between the top dead center, peripheral wall is being laid the trapped fuel groove, oil inlet hole and spill port that the pass-out casing wall of offering on the trapped fuel groove is outer, respectively be installed in cylinder body (1) outer wall on oil distribution casing (7) in in-line and the return line laid be connected, be hinged with oil inlet pipe and return tube respectively on in-line port on the oil distribution casing (7) and the return line port.

2, novel lubricating structure in the cylinder of conventional engine according to claim 1, it is characterized in that: the trapped fuel groove that peripheral wall is laid on described cylinder body (1) inwall, be on the one or more cross section of cylinder body (1), be horizontal stripe at interval shape offer or be slanted bar at interval shape offer, or front and back adjacent spaces slanted bar be head and the tail mutually topped shape offer, oil inlet hole and spill port that the oil distribution casing (7) that installs outward with cylinder body (1) wall on the trapped fuel groove is connected are opened in respectively on two adjacent cross sections.

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