KR20200023872A - Structure of cam follower pad for improving lubricity - Google Patents

Structure of cam follower pad for improving lubricity Download PDF

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Publication number
KR20200023872A
KR20200023872A KR1020180100337A KR20180100337A KR20200023872A KR 20200023872 A KR20200023872 A KR 20200023872A KR 1020180100337 A KR1020180100337 A KR 1020180100337A KR 20180100337 A KR20180100337 A KR 20180100337A KR 20200023872 A KR20200023872 A KR 20200023872A
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South Korea
Prior art keywords
cam follower
valve
oil supply
oil
pad
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KR1020180100337A
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Korean (ko)
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권희도
홍순재
서인재
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현대자동차주식회사
기아자동차주식회사
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Priority to KR1020180100337A priority Critical patent/KR20200023872A/en
Publication of KR20200023872A publication Critical patent/KR20200023872A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The present invention relates to an intake valve structure comprising a camshaft, a cam follower, a spring retainer, a lock key, a valve spring, and a valve. An oil supply unit is formed at a position where a pad unit of the cam follower and the valve come in contact with each other. The oil supply unit comprises: a collection unit formed in the pad unit of the cam follower to collect oil scattered during a stroke; and an oil supply passage which is extended from the collection unit to supply the oil to the valve.

Description

윤활개선을 위한 캠팔로워 패드부{STRUCTURE OF CAM FOLLOWER PAD FOR IMPROVING LUBRICITY}Cam follower pad part for lubrication improvement {STRUCTURE OF CAM FOLLOWER PAD FOR IMPROVING LUBRICITY}

본 발명은 윤활개선을 위한 캠팔로워 패드부에 관한 것이다. 보다 상세하게는, 본 발명은 캠팔로워 패드부와 밸브가 맞닿는 위치에 행정시 비산되는 오일을 포집하여 밸브에 공급하기 위한 오일공급부를 마련하여 캠팔로워 패드부와 밸브의 과다마모의 발생을 줄일 수 있도록 한 윤활개선을 위한 캠팔로워 패드부에 관한 것이다.The present invention relates to a cam follower pad portion for lubrication improvement. More specifically, the present invention provides an oil supply unit for collecting and supplying the oil scattered during stroke at the position where the cam follower pad portion and the valve abut, to reduce the occurrence of excessive wear of the cam follower pad portion and the valve. The cam follower pad for improving the lubrication.

일반적으로, 4행정 가솔린 엔진에 있어서, 흡배기밸브가 갖는 기능은 실린더 내 흡기와 배기의 흐름을 제어하고, 실린더 내의 기밀을 유지하는데 있다.In general, in a four-stroke gasoline engine, the function of the intake and exhaust valves is to control the flow of intake and exhaust in the cylinder, and to maintain airtightness in the cylinder.

즉, 압축 행정과 폭발 행정시에는 흡배기 밸브 모두가 닫혀 실린더 내의 기밀을 유지하고, 흡입 행정과 배기 행정시에는 각각 흡기 밸브 또는 배기 밸브만 열려 연료가스의 흡입과 연소가스의 배출이 이루어진다.That is, during the compression stroke and the explosion stroke, both the intake and exhaust valves are closed to maintain airtightness in the cylinder, and during the intake and exhaust stroke, only the intake valve or the exhaust valve is opened, respectively, to intake fuel gas and discharge the combustion gas.

상기 밸브의 개폐는 캠 샤프트에 마련된 캠이 밸브의 단부를 로커암에 의해 누름으로써 이루어지며, 캠 샤프트는 크랭크 샤프트의 구동력을 타이밍 체인 혹은 타이밍 벨트 등에 의해 전달받아 회전한다.The opening and closing of the valve is performed by the cam provided on the cam shaft pressing the end of the valve by the rocker arm, and the cam shaft is rotated by receiving the driving force of the crankshaft by a timing chain or a timing belt.

상기 릅배기 밸브는 도 1에 도시된 바와 같이, 캠축(11), 캠 팔로워(12), 스프링 리테이너(13), 로크키(14), 밸브스프링(15), 밸브(16)로 구성되어 있다.As shown in FIG. 1, the elbow valve includes a camshaft 11, a cam follower 12, a spring retainer 13, a lock key 14, a valve spring 15, and a valve 16. .

상기와 같이, 구성된 흡배기 밸브의 개폐동작을 설명하면, 피스톤의 왕복운동을 회전운동으로 변환하는 크랭크축에 연계되어서 회전하는 캠축(11)에 의해 캠 팔로워(12)가 고정축을 중심으로 작동되면서 밸브(16)가 개폐되게 된다.As described above, when the opening and closing operation of the configured intake and exhaust valve is described, the cam follower 12 is operated about the fixed shaft by the cam shaft 11 which is rotated in association with the crank shaft which converts the reciprocating motion of the piston into the rotary motion. 16 is opened and closed.

보다 상세하게는 캠축(11) 중 외경이 큰 부위가 캠 팔로워(12)을 압압하게 되면, 캠 팔로워(12)가 고정축을 중심으로 회동되면서 캠 팔로워(12)의 단부가 밸브(16) 단부를 압압하게 된다. 이에 따라 상기 밸브(16)는 밸브 가이드를 따라 하강하면서 흡배기 매니폴드와 연소실에 개통되게 된다. More specifically, when the portion of the camshaft 11 with the larger outer diameter presses the cam follower 12, the cam follower 12 rotates about the fixed shaft, and the end of the cam follower 12 moves the end of the valve 16. It will be pressed. As a result, the valve 16 is lowered along the valve guide and is opened to the intake and exhaust manifold and the combustion chamber.

그러나, 상기 밸브의 상면을 압압하는 캠 팔로워의 패드부가 로커아암의 작동에 관계없이 밸브와 접촉되도록 되어있기 때문에 캠 팔로워에 가해지는 응력이 증가하게 된다.However, since the pad portion of the cam follower pressing the upper surface of the valve is in contact with the valve regardless of the operation of the rocker arm, the stress applied to the cam follower increases.

예를 들면, 상기 밸브의 상단과 캠 팔로워 패드부 하부는 언제나 점접상태를 유지하기 때문에 양자 간의 접촉으로 인하여 캠 팔로워의 패드부가 쉽게 마모되는 결점이 있다.For example, since the upper end of the valve and the lower part of the cam follower pad are always in contact with each other, there is a drawback that the pad part of the cam follower is easily worn due to the contact between them.

더 나아가서는 캠 팔로워의 패드부가 마모되면서 캠 팔로워의 패드부와 밸브 간의 간극이 변환되어서 캠축의 작동으로 개폐되는 밸브의 개폐량이 변환되기 때문에 연소실에 공급되는 연료량 또는 공기량이 달라지게 된다.Further, since the gap between the pad portion of the cam follower and the valve is changed as the pad part of the cam follower is worn, the amount of fuel or air supplied to the combustion chamber is changed because the opening / closing amount of the valve opened and closed by the operation of the cam shaft is changed.

이에 따라, 연소실에 공급되는 혼합기의 공연비가 달라져 엔진의 출력이 불안전하게 됨은 물론이고 연료의 불안전연소로 유해한 배기가스가 다량 배출되게 되는 결점을 갖는다.As a result, the air-fuel ratio of the mixer supplied to the combustion chamber is changed so that the output of the engine is unstable, and there is a drawback that a large amount of harmful exhaust gas is discharged by unstable combustion of fuel.

1. 한국 등록특허 제10-1225883호 (2013.01.17. 공보)1. Korea Patent Registration No. 10-1225883 (January 17, 2013)

1. 한국 공개특허 제10-2006-40300호 (2006.05.10. 공보)1. Korean Patent Publication No. 10-2006-40300 (January 10, 2006)

1. 한국 공개특허 제10-2007-61633호 (2007.06.14. 공보)1. Korean Patent Publication No. 10-2007-61633 (June 14, 2007)

본 발명은 전술한 종래기술의 문제점을 해결하기 위해 안 출된 것으로서, 캠팔로워 패드부에 오일 공급 유로를 가공하여 캠팔로워 패드부와 밸브의 과다마모의 발생을 줄이는 데에 있다. The present invention has been made to solve the above-mentioned problems of the prior art, and is to reduce the occurrence of excessive wear of the cam follower pad portion and the valve by processing the oil supply flow path in the cam follower pad portion.

상기와 같은 목적을 달성하기 위한 본 발명의 구성은, The configuration of the present invention for achieving the above object,

캠축, 캠 팔로워, 스프링 리테이너, 로크키, 밸브스프링, 밸브로 구성되는 흡기밸브구조로, 상기 캠 팔로워의 패드부와 밸브가 맞닿는 위치에 오일공급부가 형성되되, 상기 오일공급부는 캠 팔로워 패드부에 형성되어 행정시 비산되는 오일을 포집하는 포집부와, 상기 포집부와 연장형성되어 포집된 오일을 밸브로 오일을 공급하기 위한 오일공급통로로 구성된다.An intake valve structure consisting of a camshaft, a cam follower, a spring retainer, a lock key, a valve spring, and a valve, wherein an oil supply portion is formed at a position where the pad portion of the cam follower comes into contact with the valve, and the oil supply portion includes a cam follower pad portion. It is formed of a collecting portion for collecting the oil is formed and scattered during the stroke, and the oil supply passage for supplying the oil to the valve extending and formed with the collecting portion.

본 발명에 따른 유로공급부를 갖는 팔로워 패드부는 다음과 같은 효과를 얻을 수가 있다.The follower pad portion having the flow path supply portion according to the present invention can obtain the following effects.

첫째, 캠팔로워 패드부의 과다마모 발생을 방지할 수가 있다.First, excessive wear of the cam follower pad portion can be prevented.

둘째, 밸브트레인에서 비산되는 오일을 모아서 캠팔로워 패드부를 통해 밸브에 오일을 공급하기 때문에 별도의 장치가 필요하지 않는다.Second, since oil is collected from the valve train and supplied to the valve through the cam follower pad part, a separate device is not required.

셋째, 오일공급으로 인해 캠 팔로워의 패드부와 밸브 간의 간극이 변환방지함으로써, 캠축의 작동으로 개폐되는 밸브의 개폐량이 변환되지 않기 때문에 연료량 또는 공기량이 원활하게 이루어진다.Third, the gap between the pad portion of the cam follower and the valve is prevented from changing due to the oil supply, so that the amount of fuel or air is made smoothly because the opening / closing amount of the valve opened and closed by the operation of the camshaft is not changed.

도 1 은 종래 흡배기 밸브를 나타낸 단면도이다.
도 2 는 본 발명에 따른 윤활개선을 위한 캠팔로워 패드부를 나타낸 사시도이다.
도 3 은 본 발명에 따른 윤활개선을 위한 캠팔로워 패드부를 나타낸 단면도이다.
도 4는 도 3의 A부의 요부확대도면이다.1 is a cross-sectional view showing a conventional intake and exhaust valve.
Figure 2 is a perspective view showing a cam follower pad for lubrication improvement according to the present invention.
3 is a cross-sectional view showing a cam follower pad unit for lubrication improvement according to the present invention.
4 is an enlarged view illustrating main parts of part A of FIG. 3.

이하, 첨부된 도면에 의거하여 본 발명에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 그러나, 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 동일 또는 유사한 구성요소에 대해서는 동일한 참조 부호를 붙이도록 한다.In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.

또한, 본 명세서 및 특허청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정하여 해석되어서는 안되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.In addition, the terms or words used in the specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly define the concept of terms in order to explain their invention in the best way. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can.

이하, 첨부된 도면을 참조하면서 본 발명에 따른 바람직한 일 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

설명에 앞서 본 발명에 적용되는 캠축(11), 캠 팔로워(12), 스프링 리테이너(13), 로크키(14), 밸브스프링(15), 밸브(16)로 구성되는 것은 종래와 동일하다.Prior to the description, the camshaft 11, the cam follower 12, the spring retainer 13, the lock key 14, the valve spring 15, and the valve 16 applied to the present invention are the same as in the related art.

다만, 상기 캠 팔로워(12)와 밸브(16)가 맞닿는 위치에 오일공급부(100)가 형성되어 있는 것이 본 발명의 특장점이다.However, it is a feature of the present invention that the oil supply part 100 is formed at a position where the cam follower 12 and the valve 16 contact each other.

상기 오일공급부(100)는 도 4에 도시된 바와 같이, 캠 팔로워 패드부에 형성되어 행정시 비산되는 오일을 포집하는 포집부(101)와, 상기 포집부(101)와 연장형성되어 포집된 오일을 밸브(16)로 공급하기 위한 오일공급통로(102)로 구성된다.As shown in FIG. 4, the oil supply unit 100 is formed in a cam follower pad part and collects oil that is scattered during the stroke, and the oil collected by being extended with the collecting part 101. It is composed of an oil supply passage 102 for supplying to the valve (16).

더욱 상세하게는 상기 포집부(101)는 타원형을 이루고 밸브(16) 쪽으로 호형상의 경사를 가지도록 형성되어 있으며, 상기 오일공급통로(102)를 중심으로 캠(11)이 형성된 면보다 반대쪽 면이 더 넓게 확장되어 있다.In more detail, the collecting portion 101 is formed to have an elliptical shape and has an arc shape inclination toward the valve 16, and has a surface opposite to the surface on which the cam 11 is formed around the oil supply passage 102. It is wider.

이는 도 4에 도시된 바와 같이, 상승되는 밸브에 의해 비산된 오일을 더 많이 포집할 수 있게 함이다.This makes it possible to capture more oil scattered by the raised valve, as shown in FIG.

따라서, 상기와 같이 구성되는 캠팔로워 패드부를 이용하여 흡배기 밸브의 개폐동작을 설명하면 다음과 같다.Therefore, the opening and closing operation of the intake / exhaust valve using the cam follower pad unit configured as described above is as follows.

피스톤의 왕복운동을 회전운동으로 변환하는 크랭크축에 연계되어서 회전하는 캠축(11)에 의해 캠 팔로워(12)가 고정축을 중심으로 작동되면서 밸브(16)가 개폐되게 된다.The valve 16 is opened and closed while the cam follower 12 is operated about the fixed shaft by the cam shaft 11 which rotates in association with the crank shaft which converts the reciprocating motion of the piston into the rotary motion.

보다 상세하게는 캠축(11) 중 외경이 큰 부위가 캠 팔로워(12)을 압압하게 되면, 캠 팔로워(12)이 고정축을 중심으로 회동되면서 캠 팔로워(12)의 단부가 스프링 리테이너(13)를 압압하게 된다.More specifically, when a portion of the cam shaft 11 having a large outer diameter pushes the cam follower 12, the cam follower 12 rotates about the fixed shaft, and the end of the cam follower 12 moves the spring retainer 13. It will be pressed.

그러면, 이에 따라 스프링 리테이너(13)가 밸브 스프링(15)을 압압하면서 하강되어짐과 동시에 밸브(16)가 밸브 가이드를 따라 하강하면서 흡배기 매니폴드와 연소실에 개통되게 된다.Then, the spring retainer 13 is lowered while pressing the valve spring 15, and the valve 16 is lowered along the valve guide and is opened to the intake and exhaust manifold and the combustion chamber.

이때, 엔진 내의 오일이 비산하게 되는 데 상기와 같이 비산되는 오일은 도 4에 도시된 바와 같이, 오일공급부(100)를 구성하는 포집부(101)에 의해 포집되고, 포집된 오일은 오일공급통로(102)를 따라 캠 팔로워 패드부 하부와 밸브 단부 사이의 접촉부위로 흘러들어 감으로써, 캠팔로워 패드부의 과다마모 발생을 방지할 수가 있다. At this time, the oil in the engine is to be scattered as shown in Figure 4, the oil is scattered by the collecting unit 101 constituting the oil supply unit 100, as shown in Figure 4, the collected oil is an oil supply passage Excessive wear of the cam follower pad portion can be prevented by flowing into the contact portion between the cam follower pad portion lower portion and the valve end portion along the 102.

따라서 종래와 같이 캠팔로워 패드부의 마모로 인하여 밸트 트레인 거동이 불안정하였던 것을 안정적으로 유지할 수가 있음과 동시에 내구력을 상승시킬 수가 있는 것이다.Therefore, it is possible to stably maintain the unstable belt train behavior due to the wear of the cam follower pad part as in the prior art and to increase the durability.

이상에서 설명한 본 발명은 전술한 실시예 및 첨부된 도면에 의해 한정되는것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능하다는 것이 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 있어 명백할 것이다.The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

11 : 캠축 12 : 캠 팔로워
13 : 스프링 리테이너 14 : 로크키
15 : 밸브스프링 16 : 밸브
100 : 오일공급부 101 : 포집부
102 : 오일공급통로11: Camshaft 12: Cam Followers
13: spring retainer 14: lock key
15: valve spring 16: valve
100: oil supply unit 101: collecting unit
102: oil supply passage

Claims (4)

캠축, 캠 팔로워, 스프링 리테이너, 로크키, 밸브스프링, 밸브로 구성되는 흡기밸브구조에 있어서,
상기 캠 팔로워의 패드부와 밸브가 맞닿는 위치에 오일공급부가 형성된 것을 특징으로 하는 윤활개선을 위한 캠팔로워 패드부.
In the intake valve structure consisting of a camshaft, a cam follower, a spring retainer, a lock key, a valve spring, and a valve,
Cam follower pad portion for lubrication improvement, characterized in that the oil supply portion is formed in a position where the pad portion of the cam follower and the valve abuts.
제 1 항에 있어서,
상기 오일공급부는;
캠 팔로워 패드부에 형성되어 행정시 비산되는 오일을 포집하는 포집부와, 상기 포집부와 연장형성되어 포집된 오일을 밸브로 공급하기 위한 오일공급통로로 구성된 것을 특징으로 하는 윤활개선을 위한 캠팔로워 패드부.
The method of claim 1,
The oil supply unit;
Cam follower for lubrication improvement, characterized in that the cam follower is formed in the pad portion to collect the oil to be scattered during the stroke, and the oil supply passage for supplying the collected oil extended to the collecting portion to the valve Pad part.
제 1 항에 있어서,
상기 포집부는 타원형을 이루고 밸브 쪽으로 호형상의 경사를 가지도록 형성된 것을 특징으로 하는 윤활개선을 위한 캠팔로워 패드부.
The method of claim 1,
Cam collecting pad portion for lubrication improvement, characterized in that the collecting portion is formed to have an elliptical shape and has an arc-shaped inclination toward the valve.
제 2 항에 있어서,
상기 오일공급부는 오일공급통로를 중심으로 캠 쪽 면보다 반대쪽 면이 더 넓게 확장된 면을 갖는 것을 특징으로 하는 윤활개선을 위한 캠팔로워 패드부.

The method of claim 2,
The oil supply part cam follower pad portion for lubrication improvement, characterized in that the oil supply passage has a surface that is wider than the other side of the cam side around the oil supply passage.

KR1020180100337A 2018-08-27 2018-08-27 Structure of cam follower pad for improving lubricity KR20200023872A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060040300A (en) 2004-11-05 2006-05-10 현대자동차주식회사 Valve spring retainer of an engine
KR20070061633A (en) 2005-12-10 2007-06-14 현대자동차주식회사 Malfunction preventing structure of variable valve lift apparatus for an engine
KR101225883B1 (en) 2006-12-14 2013-01-24 현대자동차주식회사 A variable valve operating system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060040300A (en) 2004-11-05 2006-05-10 현대자동차주식회사 Valve spring retainer of an engine
KR20070061633A (en) 2005-12-10 2007-06-14 현대자동차주식회사 Malfunction preventing structure of variable valve lift apparatus for an engine
KR101225883B1 (en) 2006-12-14 2013-01-24 현대자동차주식회사 A variable valve operating system

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