CN105569756B - Arranged on top of diesel engine single camshaft drives Valve Rocker Organization - Google Patents

Abstract

Arranged on top of diesel engine single camshaft drives Valve Rocker Organization, including：Exhaust rocker arm, intake rocker, rocking arm bulb, rocking arm ball cup, rocker arm shaft, rocking arm rolling pin, rocker shaft bed, rocking arm roller；On rocking arm ball cup suit rocking arm bulb；The rocking arm bulb end of thread is screwed into rocking arm valve end screwed hole, and nut is arranged on rocking arm bulb and exposed at the top of the end of thread of rocking arm end face；Rocking arm roller is arranged in the fluting of rocker cam end, is combined as a whole by the rocking arm rolling pin for inserting rocker cam end endoporus with rocking arm；Alignment pin is installed in rocker shaft bed bottom surface, and top surface mills out intake rocker, exhaust rocker arm mounting groove, groove bottom installation rocker shaft bed fixing screws；Rocker arm shaft is made up of the installation base and the intake rocker at both ends, the fixing axle of exhaust rocker arm of centre, and the equal horizontal direction milling of two axial ends is put down；Intake rocker and exhaust rocker arm are set in rocker arm shaft both ends；Three bolts are each passed through rocker arm shaft both ends and middle part, and rocker arm shaft is fixed on into top surface on rocker shaft bed, and with positioning finger setting.

Description

Arranged on top of diesel engine single camshaft drives Valve Rocker Organization

Technical field

The invention belongs to field of internal combustion engine, is related to a kind of arranged on top of diesel engine single camshaft driving Valve Rocker Organization.

Background technology

At present, China is more and more stricter for the emission request of vehicle, and the application of vehicle exhaust after-treatment device is more and more extensive, Requirement to enging cabin space availability ratio also more and more higher, these all propose higher requirement to the design of diesel engine.Often The dual overhead camshaft configuration seen, amount of parts is more, and each component processing of mechanism and assembly technology are complicated, and manufacture difficulty is big；Machine Structure axial height and transverse width are all larger, add the height and width dimensions of Diesel Engine Complete Machine.And it is traditional in put cam For shaft transmission due to complicated, parts are more, dismounting inconvenience, and control accuracy is poor, can not meet that diesel engine is high and turn Speed, the requirement of high strengthening.Therefore, a kind of SOHC Single Overhead Camshaft and Rocker arm assembly structure is designed, can effectively shorten diesel engine distribution The height dimension and transverse width of mechanism, reliability, durability, accuracy and the uniformity of rocker arm body work were both ensure that, Meet compact-sized global design requirement again.

The content of the invention

It is an object of the invention to provide a kind of compact-sized, accurate positioning, the arranged on top of diesel engine list cam of reliable operation Axle drives Valve Rocker Organization, with overcome the deficiencies in the prior art.

The technical scheme is that：Arranged on top of diesel engine single camshaft drives Valve Rocker Organization, including：Exhaust rocker arm, Nut, intake rocker, rocking arm bulb, rocking arm ball cup, rocker arm shaft, patch, rocking arm rolling pin, the first alignment pin, rocker shaft bed, Two alignment pins, rocker shaft bed fixing screws, rocking arm roller and bolt；Rocking arm ball cup is sleeved on rocking arm bulb, rocking arm bulb In rocking arm ball cup rotatably freely；The end of thread of rocking arm bulb is screwed into the screwed hole of rocking arm valve end, and nut is arranged on Rocking arm bulb exposes at the top of the end of thread of rocking arm end face；Rocking arm roller is arranged in the fluting at rocker cam end, is shaken by insertion The rocking arm rolling pin of arm cam end endoporus combines as a whole with rocking arm；The second alignment pin is installed in rocker shaft bed bottom surface, and top surface mills out air inlet Rocking arm, exhaust rocker arm mounting groove, groove bottom installation rocker shaft bed fixing screws, groove side is carried out to intake rocker, exhaust rocker arm Axial constraint；Rocker arm shaft is made up of the installation base and the intake rocker at both ends, the fixing axle of exhaust rocker arm of centre, and two axial ends are equal Horizontal direction milling is put down；Intake rocker and exhaust rocker arm are set in rocker arm shaft both ends；Three bolts are each passed through rocker arm shaft Both ends and middle part, rocker arm shaft is fixed on to the upper top surface of rocker shaft bed, and finger setting is positioned with first.

The intake rocker and the fixing axle of exhaust rocker arm 1 at rocker arm shaft both ends use different core structures, along vertical crankshaft axis side There is identical Rocker Ratio to the distance guarantee intake rocker and exhaust rocker arm pulled open and may be mounted on Same Part.

Be disposed with rocker arm shaft axially through horizontal oil duct A and connection bottom surface and horizontal oil duct vertical oil duct；Water Flat oil duct both ends are blocked with patch, and vertical oil duct penetrates with rocker shaft bed upper surface oilhole, horizontal oil duct A shunting oil duct, with Oil duct, center offset distance on inlet and outlet rocking arm are 3 ± 0.2 mm.

The present invention can reach following beneficial effect after using above-mentioned technical proposal：This arranged on top of diesel engine single camshaft driving gas Door rocker arm body, compact-sized, intensity is high, convenient disassembly, and operation is accurate reliable.Each part manufacture easy to process.Mechanism profile Size is small, can effectively reduce the height and width of Diesel Engine Complete Machine.Rational oil circuit arrangement, can effectively ensure that lubrication, reduce each Abrasion between part, improve the service life of part.

Brief description of the drawings

Fig. 1 is the assembling structure schematic diagram that arranged on top of diesel engine single camshaft of the present invention drives Valve Rocker Organization.

Fig. 2 is the lubricant passage way schematic diagram that arranged on top of diesel engine single camshaft of the present invention drives Valve Rocker Organization.

Fig. 3 is the internal lubrication oil circuit section expansion that arranged on top of diesel engine single camshaft of the present invention drives Valve Rocker Organization Figure.

Embodiment

The present invention is described further below in conjunction with the accompanying drawings：As shown in Fig. 1 ~ 3, arranged on top of diesel engine single camshaft driving gas Door rocker arm body, including：Exhaust rocker arm 1, nut 2, intake rocker 3, rocking arm bulb 4, rocking arm ball cup 5, rocker arm shaft 6, patch 7th, rocking arm rolling pin 8, the first alignment pin 9, rocker shaft bed 10, the second alignment pin 11, fixing screws 12, rocking arm roller 13 and bolt 14；Rocking arm ball cup 5 is sleeved on rocking arm bulb 4, and the top of rocking arm ball cup 5 shapes with the profile extrusion of rocking arm bulb 4, rocking arm Bulb 4 in rocking arm ball cup 5 it is rotatable freely.The end of thread of rocking arm bulb 4 is screwed into the screwed hole of rocking arm valve end, spiral shell Mother 2 is arranged on rocking arm bulb 4 and exposed at the top of the end of thread of rocking arm end face.Rocking arm roller 13 is arranged on the fluting at rocker cam end It is interior, combined as a whole by the rocking arm rolling pin 8 for inserting rocker cam end endoporus with rocking arm.The positioning of the bottom surface of rocker shaft bed 10 installation second Pin 11, top surface mill out intake rocker 3, the mounting groove of exhaust rocker arm 1, groove bottom installation rocker shaft bed fixing screws 12, groove side pair Intake rocker 3, exhaust rocker arm 1 carry out axial constraint.Rocker arm shaft 6 is by the installation base of centre and intake rocker 3, the exhaust at both ends The fixing axle of rocking arm 1 is formed, and the equal horizontal direction milling of two axial ends is put down.Intake rocker 3 and exhaust rocker arm 1 are set in 6 liang of rocker arm shaft End.Three bolts 14 are each passed through the both ends and middle part of rocker arm shaft 6, and rocker arm shaft 6 is fixed on to the upper top surface of rocker shaft bed 10, and Positioned with the first alignment pin 9, this mounting means can effectively ensure that the reliability and accuracy of rocker arm shaft 6.On rocker shaft bed 10 The two rocking arm mounting grooves milled out, the setting height(from bottom) of rocker arm shaft 6 is reduced to greatest extent, so as to reduce the overall high of mechanism Degree.The intake rocker 3 at the both ends of rocker arm shaft 6, the fixing axle of exhaust rocker arm 1 use different core structures, are drawn along vertical crankshaft axis direction Suitable distance to be opened, ensures that intake rocker 3, exhaust rocker arm 1 can be both arranged on Same Part, and can meets unified Rocker Ratio, Reduce installation fixing point, shorten the length and width of mechanism.

Be disposed with rocker arm shaft 6 axially through horizontal oil duct A and connection bottom surface and horizontal oil duct A vertical oil duct B. Horizontal oil duct A both ends patch 7 blocks, and vertical oil duct B penetrates with the upper surface oilhole of rocker shaft bed 10.Lubricating oil is by the main oil of cylinder cap Road leads to rocker shaft bed 10, flows upwardly into the vertical oil duct B of rocker arm shaft 6, then branches to both sides through the horizontal oil duct A of rocker arm shaft 6 A1, A2 and A3, A4, the rubbing surface between A1, A2 oil duct lubrication rocker arm shaft 6 and intake rocker 3, exhaust rocker arm 1 is flowed through all the way, then Rocking arm bulb 4, rocking arm ball cup 5, lubrication rocking arm bulb 4, rocking arm are flow to through C, D oil duct on intake rocker 3, exhaust rocker arm 1 The cooperation plane between spherical mating surface and rocking arm ball cup 5 and valve bridge arm between ball cup 5；Another way is by A3, A4 oil Road flow to rocking arm roller 13, rocking arm rolling pin 8, lubricates the relative motion position between rocking arm roller 13 and rocking arm rolling pin 8, and convex The contact surface of wheel and rocking arm roller 13.Wherein, rocker arm shaft 6, which is branched on oil duct A1, A2 and rocking arm of rocking arm bulb 4, leads to rocking arm Corresponding oil duct C, D of bulb 4 stagger, and two oil duct center offset distance L are 3 ± 0.2 mm, may be implemented in the sufficient premise of lubricants capacity Under reduce to greatest extent lubricating oil leakage loss.The oil circuit design of arranged on top of diesel engine single camshaft driving Valve Rocker Organization Both the effectively lubricating of each part can have been ensured, reduced friction, improved mechanical efficiency, ensured that the stabilization of oil pressure, it is ensured that complete machine is steady Fixed operation.

When the engine runs, on camshaft each cylinder inlet and outlet cam the corresponding distribution moment jack up corresponding to rocking arm Roller 13, the one side of driving rocking arm roller 13 rotate around rocking arm rolling pin 8, motion upwards on one side, so as to drive whole rocking arm Rotated with rocker arm shaft 6 for rotating shaft, the rocking arm bulb 4 of valve end and rocking arm ball cup 5 is produced and is moved downward, and then drive Dynamic inlet and outlet door moves downward, and opens inlet and outlet passage.

The present invention is compact-sized, and installation positioning is reliable.The mounting structure form of rocker arm shaft, improves the rigidity of structure, makes to shake Arm axle is not likely to produce vibration in operation process, so that it is guaranteed that valve timing is accurate, while shortens mechanism axial length.Shake The installation positioning form of arm axle seat and rocking arm, both ensure that linking intensity, meets the requirement of inlet and outlet Rocker Ratio, reduces again Mechanism height.Lubricant passage way connection and reasonable arrangement, each part lubrication, cooling are uniformly reliable.Mechanism assembly corrects through FEA structural analyses, Realize that stress optimizes, it is ensured that each position of part there are enough strength and stiffness, effectively improves functional reliability, drops simultaneously Low noise and vibration.

Claims (1)

1. arranged on top of diesel engine single camshaft drives Valve Rocker Organization, including：Exhaust rocker arm（1）, nut（2）, intake rocker （3）, rocking arm bulb（4）, rocking arm ball cup（5）, rocker arm shaft（6）, patch（7）, rocking arm rolling pin（8）, the first alignment pin（9）, shake Arm axle seat（10）, the second alignment pin（11）, rocker shaft bed fixing screws（12）, rocking arm roller（13）And bolt（14）；Its feature It is：Rocking arm ball cup（5）It is sleeved on rocking arm bulb（4）On, rocking arm bulb（4）In rocking arm ball cup（5）It is interior it is rotatable freely； Rocking arm bulb（4）The end of thread be screwed into the screwed hole of rocking arm valve end, nut（2）Installed in rocking arm bulb（4）Expose rocking arm At the top of the end of thread of end face；Rocking arm roller（13）In the fluting at rocker cam end, by inserting rocker cam end endoporus Rocking arm rolling pin（8）Combined as a whole with rocking arm；Rocker shaft bed（10）Bottom surface is installed by the second alignment pin（11）, top surface mills out air inlet and shakes Arm（3）, exhaust rocker arm（1）Mounting groove, groove bottom installation rocker shaft bed fixing screws（12）, groove side is to intake rocker（3）, row Gas rocking arm（1）Carry out axial constraint；Rocker arm shaft（6）By the installation base of centre and the intake rocker at both ends（3）, exhaust rocker arm （1）Fixing axle form, the equal horizontal direction milling of two axial ends puts down；Intake rocker（3）And exhaust rocker arm（1）It is set in rocker arm shaft （6）Both ends；Three bolts（14）It is each passed through rocker arm shaft（6）Both ends and middle part, by rocker arm shaft（6）It is fixed on rocker shaft bed （10）Upper top surface, and with the first alignment pin（9）Positioning；Rocker arm shaft（6）The intake rocker at both ends（3）And exhaust rocker arm（1）Gu Dead axle uses different core structures, and the distance pulled open along vertical crankshaft axis direction ensures intake rocker（3）And exhaust rocker arm（1）Tool There is identical Rocker Ratio and may be mounted on Same Part；Rocker arm shaft（6）On be disposed with axially through horizontal oil duct（A）With And connection bottom surface and horizontal oil duct（A）Vertical oil duct（B）；Horizontal oil duct A both ends patch（7）Closure, vertical oil duct（B）With Rocker shaft bed（10）Upper surface oilhole insertion, horizontal oil duct（A）Shunting oil duct（A1）、（A2）With the oil on inlet and outlet rocking arm Road（C）、（D）Center offset distance（L）For 3 ± 0.2 mm.