CN107762582A - One kind has pooling feature gapless combustion engine mechanical formula valve tappet - Google Patents
One kind has pooling feature gapless combustion engine mechanical formula valve tappet Download PDFInfo
- Publication number
- CN107762582A CN107762582A CN201610673598.XA CN201610673598A CN107762582A CN 107762582 A CN107762582 A CN 107762582A CN 201610673598 A CN201610673598 A CN 201610673598A CN 107762582 A CN107762582 A CN 107762582A
- Authority
- CN
- China
- Prior art keywords
- tappet
- valve
- depression bar
- accommodating chamber
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F01L1/14—Tappets; Push rods
- F01L1/16—Silencing impact; Reducing wear
Abstract
The present invention relates to one kind pooling feature gapless engine valve tappet, and the mechanical tappet has the tappet main body of hollow cylindrical, and the tappet buffer unit between tappet main body and rocking arm, tappet buffer unit include：Helical pitch installed in the upper end of tappet main body, helical pitch include accommodating chamber and insertion section, and accommodating chamber and insertion section are hollow cylindrical, and the internal diameter of accommodating chamber is more than the internal diameter of insertion section, and the upper end of tappet main body is inserted in insertion section；The buffer spring being contained in accommodating chamber；Depression bar on buffer spring, depression bar include head, bottom and between head and bottom and diameter be more than head, the shoulder of bottom, the head of depression bar abuts rocking arm, and the bottom of depression bar abuts buffer spring；And the gland installed in accommodating chamber upper end；Gland props up the shoulder of depression bar, and the head of depression bar is stretched out from gland.The valve tappet of the present invention can extend valve service life, while also reduce noise.
Description
Technical field
The present invention relates to the valve actuating gear of internal combustion engine, and in particular to the mechanical valve of adjustable valve clearance is endured
Post.
Background technology
As the continuous improvement of internal combustion engine property indices, IC engine cylinder combustion pressure, delivery temperature etc. all have therewith
Greatly improve.This throat to internal combustion engine --- inlet valve, exhaust valve propose requirements at the higher level.All high-power four punchings in the whole world at present
Journey internal combustion engine is nearly all present because valve is broken, fracture, crosses quick-wearing, causes the important spare parts such as cylinder cap, piston, booster tight
Damage again.Valve service life is not grown, and is one of the maximum reason that significant trouble occurs for internal combustion engine.
In order to further improve valve security reliability, major combustion engine manufacture R ＆ D Enterprises are cooperated with each valve manufactory
Common research and development improve, and reduce accident, increase the service life.Such as the maximum Germany of marine diesel engines manufacturing enterprise in the whole world
MAN Diesel＆Turbo companies are in November, 2015 and the applicant's R ＆ D Cooperation a new generation quartastroke engine
DuraSpindle valves, to improve security reliability and increase the service life.Almost all people considers above to carry in valve quality
Height ensures security reliability, increases the service life.Because valve is in the Special Ring of HTHP high impact forces high corrosion for a long time
Worked under border, it is desirable to which further raising valve quality itself is very difficult, and cost is also very high.
In order to solve the problems, such as above long-term existence, clear and definite valve breakage main cause is first had to.Due to valve valve seating
Worked under combustion high temperature, sealing surface hardness declines to a great extent, plus gases at high pressure and high intensity valve spring double action, valve
Closing impulsive force of taking a seat is very big.After particularly valve tappet leaves cam control, valve clearance is bigger, and air valve drop impulsive force is got over
Greatly, more rough, bigger to valve injury, this is the main reason for causing valve, valve seating premature breakdown.If it can ensure that
On the premise of the punctual open and close sealing of valve, how effectively to reduce air valve drop impulsive force and be to ensure that valve is safe and reliable, prolong
The powerful guarantee of long life.
The hydraulic tappet for automatically adjusting engine valve clearance is disclosed at present, for example, see CN103437847.So
And for mechanical tappet, it can not automatically adjust the mechanism of valve clearance with valve motion automatically well.
The content of the invention
For above long-term existence problem, with reference to the present inventor's research for internal combustion engine air-exhausting air-entering mechanism for many years, sheet
Invention aim to provide it is a kind of simple, reliably have pooling feature gapless mechanical formula valve tappet, applied to Engine Cam.Tool
For body, currently invention addresses existing diesel engine such a kinematic chain from cam rotation to valve reciprocation is improved, protect
It is constant to hold other parts in kinematic chain, increases a set of buffer unit on valve tappet head, realizes air valve drop pooling feature,
Specifically, being driven by driving-chain in valve stroke, the gap of buffer unit adjusts slow release in the presence of spring in gap,
Original valve clearance is made up, reduces valve clearance and exists so as to reduce air valve drop impulsive force, it is ensured that air valve drop is last zero
Effective cushioning effect is played when putting several millimeters, while accomplishes valve and rocking arm regulating bolt gapless again, and valve can be made normal
Open and close seals, and air valve drop impulsive force is reduced more than 70%, reaches and extends valve service life, improves safe and reliable
Property, reduce noise effects.
The present invention provides a kind of mechanical tappet of explosive motor, and the mechanical tappet has enduring for hollow cylindrical
Post main body, and the tappet buffer unit between the tappet main body and rocking arm, the tappet buffer unit include：Installation
Helical pitch in the upper end of the tappet main body, the helical pitch include accommodating chamber and insertion section, and the accommodating chamber and insertion section are
Hollow cylindrical, the internal diameter of the accommodating chamber are more than the internal diameter of the insertion section, and the tappet main body is inserted in the insertion section
Upper end；The gap adjustment spring being contained in the accommodating chamber；Depression bar on gap adjustment spring, the depression bar
Including head, bottom and between the head and bottom and diameter be more than head, bottom shoulder, the depression bar
Head abuts the rocking arm, and the bottom of the depression bar abuts the gap adjustment spring；And installed in the accommodating chamber upper end
Gland；The gland props up the shoulder of the depression bar, and the head of the depression bar is stretched out from the gland.
The present invention installs a set of buffer unit with spring on tappet head.According to setting, valve clearance size is in bullet
Can freely it be stretched under spring effect, buffer unit gland can adjust spring lift and is consistent with setting valve clearance size, big by one
Point ensures that depression bar holds out against rocking arm gapless.When cam operating tappet top upper rocker arm, after first eliminating buffer unit gap, in rocking arm thick stick
Bar effect is lower to open valve operation.Tappet effective length length and design requirement are constant during work, become valve clearance
Grow portion size tappet Shen.When valve finally close take a seat close when, due to valve buffer unit spring and valve spring force phase interaction
(buffer unit spring strength must be weaker than valve spring, and otherwise valve-closing is not in place) air valve drop impulsive force can be a large amount of under
Reduce, while also reduce noise.Additional advantage is simple in construction, good reliability, and the other parts of internal combustion engine not changed, peace
Fill convenient and reasonable, manufacturing cost is low etc..
It is preferred that the upper portion side wall of the accommodating chamber has step.By means of this, the shoulder that can limit depression bar is transported downwards
Dynamic maximum magnitude.
Brief description of the drawings
Fig. 1 is a kind of structure for the valve distribution mechanism for including pooling feature gapless combustion engine mechanical formula valve tappet
Schematic diagram；
Fig. 2 be Fig. 1 in tappet buffer unit enlarged diagram；
Reference：1- cams；2- rollers；3- roller pins；4- roller mounts；5- housings；6- tappet main bodys；7- springs；8- pressing plates；
9- tappet sets；10- rocker arm brackets；11- tappet buffer units；11-1 helical pitches；11-2 gaps adjust spring；11-3 depression bars；11-4 is pressed
Lid；11-5 accommodating chambers；11-6 insertion sections；12- rocking arms；13- rocker arm shafts；14- is adjustable top screw；15- valve Hough lockers；
16- valve spring upper seats；17- valve spring；Seat under 18- valve spring；19- valve guides；20- valves；21- valve seatings；22-
Cylinder head；23- diesel-engine bodies.
Embodiment
With reference to Figure of description, and the present invention is further illustrated with the following embodiments, it should be appreciated that following embodiments
The present invention is merely to illustrate, is not intended to limit the present invention.
Reference picture 1, the valve distribution mechanism that includes pooling feature gapless engine valve tappet is shown respectively in it
Structural representation, cam 1 are fixed on camshaft, and the motion of cam 1 can be transmitted as the roller 2 against its edge.Roller 2 can
It is arranged on roller pin 3 in roller mount 4, tappet main body 6 is also mounted in roller mount 4, and tappet set 9 is fixed on pressing plate 8, pressing plate
8 are fixed on housing 5, and housing 5 is further fixed on diesel-engine body 23.The lower end of tappet main body 6, roller mount 4 accommodate
In housing 5.Spring 7 is installed between roller mount 4 and pressing plate 8.
Tappet buffer unit 11 and helical pitch 11-1 thereon are arranged on the top of tappet main body 6, referring to Fig. 2, helical pitch 11-1
With the different two parts up and down of internal diameter, to accommodate the accommodating chamber 11-5 that gap adjusts spring 11-2, its internal diameter can be equal on top
Or the internal diameter slightly larger than tappet main body 6, internal diameter of the internal diameter less than accommodating chamber 11-5 of helical pitch 11-1 bottom is so as in accommodating chamber
Form step-like connecting portion with insertion section, also serve as the bottom of accommodating chamber with limit gap adjustment spring 11-2 move downward into
Enter helical pitch 11-1 bottom.The internal diameter of the external diameter matching tappet main body 6 of helical pitch 11-1 bottom is so as to forming pluggable tappet master
The insertion section 11-6 of body 6.Gap adjustment spring 11-2 upper ends are provided with depression bar 11-3, and depression bar 11-3 motion can be compressed or release
Put gap adjustment spring 11-2.Gland 11-4 is mounted in helical pitch 11-1 upper ends, and gland 11-4 periphery can surround helical pitch 11-1 upper ends
External diameter be downwardly extending lid, and gland 11-4 top surface can centered on there is the discoid of round hole.Depression bar 11-3
Crosswise is formed like, specifically includes the head abutted with rocking arm 12, and abut down with gap adjustment spring 11-2
Portion, and the shoulder of connection head and bottom, the diameter of the shoulder are more than head and bottom, the basic phase of diameter on head and bottom
Together, but the upper limb on head forms arc-shaped depression rocking arm 12 and abutted.Also, the side wall on helical pitch 11-1 accommodating chamber 11-5 tops can shape
Stepped, so that the diameter of shoulder of the internal diameter on accommodating chamber 11-5 tops slightly larger than depression bar 11-3, and under accommodating chamber 11-5
The diameter of shoulder of the internal diameter of the side wall in portion less than depression bar 11-3, by means of this, can limit the maximum that depression bar 11-3 is moved downward
Stroke.Depression bar 11-3 shoulder is located at gland 11-4 lower section, but head is stretched out from gland 11-4 center raw ore.
Rocking arm 12 is arranged on rocker arm shaft 13, and rocker arm shaft 13 is then fixed on rocker arm bracket 10, and rocker arm bracket 10 is fixed on cylinder
On lid 22, cylinder head 22 is fixed on diesel-engine body 23.Adjustable top screw 14 is fixed on rocking arm 12, valve Hough locker
15 are fixed on valve spring upper seat 16, and valve spring 17 is fixed between valve spring upper seat 16 and valve spring lower seat 18,
Seat 18, valve guide 19 are fixed in cylinder head 22 under valve spring, and valve 20 is arranged in valve guide 19, and valve seating 21 is solid
It is scheduled in cylinder head 22.
According to Fig. 1 and Fig. 2, during work, cam 1 rotates, top upper roller 2 and roller mount 4, promote tappet 6 together to
Upper motion, helical pitch 11-1 and depression bar 11-3 operating ranges in valve buffer unit 11 are first eliminated, due to gap adjustment spring 11-2
Intensity is weaker than valve spring 17, so in the upward motion process of tappet, in not eliminating helical pitch 11-1 and depression bar 11-3 activities away from
From preceding, gap adjustment spring 11-2 is the motionless rocking arm 12 in top.In elimination after helical pitch 11-1 and depression bar 11-3 operating ranges, tappet
6 continue up top rocking arm 12, are acted on using rocker lever, rocking arm other end valve 20 is pushed into unlatching.Cam 1 turns to
Top dead centre, complete an air inlet or exhaust.Cam 1 is rotated further, and roller 2, roller mount 4, tappet 6 are by the elastic force of valve spring 17
Effect, is moved downwardly together with the shape line of cam 1, when cam rotation is to lower dead center, valve-closing.Apneustic buffer unit
11, tappet 6 will be spaced apart with rocking arm 12, and here it is valve clearance.Valve clearance is bigger, and air valve drop is thicker
Cruelly.After tappet head increase valve buffer unit 11, when cam 1 turns to lower dead center, gap adjustment spring 11-2 withstands pressure
Bar 11-3, depression bar 11-3 fore-set rocking arms, gap is eliminated, cushioning effect is played under the adjustment spring 11-2 effects of gap.According to gas
Door spring strength Proper Match buffer spring, can so reduce more than 80% air valve drop impulsive force, same to reduce noise of taking a seat,
Greatly prolong valve service life.
Claims (2)
1. the mechanical tappet of a kind of explosive motor, it is characterised in that the mechanical tappet has enduring for hollow cylindrical
Post main body (6), and the tappet buffer unit (11) between the tappet main body (6) and rocking arm (12), the tappet delay
Flushing device (11) includes：
Helical pitch (11-1) installed in the upper end of the tappet main body (6), the helical pitch (11-1) include accommodating chamber (11-5) and
Insertion section (11-6), the accommodating chamber (11-5) and insertion section (11-6) are hollow cylindrical, the accommodating chamber (11-5)
Internal diameter is more than the internal diameter of the insertion section (11-6), and the insertion section (11-6) inserts the upper end of the tappet main body (6)；
The buffer spring (11-2) being contained in the accommodating chamber (11-5)；
Depression bar (11-3) on the buffer spring (11-2), the depression bar (11-3) include head, bottom and position
Between the head and bottom and diameter is more than head, the shoulder of bottom, described in the head of the depression bar (11-3) abuts
Rocking arm (12), the bottom of the depression bar (11-3) abut the buffer spring (11-2)；And
Gland installed in the accommodating chamber (11-5) upper end；The gland props up the shoulder of the depression bar, and the depression bar
Head is stretched out from the gland.
2. mechanical tappet according to claim 1, it is characterised in that the upper portion side wall of the accommodating chamber (11-5) has
Step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610673598.XA CN107762582A (en) | 2016-08-16 | 2016-08-16 | One kind has pooling feature gapless combustion engine mechanical formula valve tappet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610673598.XA CN107762582A (en) | 2016-08-16 | 2016-08-16 | One kind has pooling feature gapless combustion engine mechanical formula valve tappet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107762582A true CN107762582A (en) | 2018-03-06 |
Family
ID=61260715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610673598.XA Pending CN107762582A (en) | 2016-08-16 | 2016-08-16 | One kind has pooling feature gapless combustion engine mechanical formula valve tappet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107762582A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1675954A (en) * | 1924-08-26 | 1928-07-03 | L G Hoxton | Valve-tappet construction |
| JPS5573504U (en) * | 1978-11-17 | 1980-05-21 | ||
| JPS55116803U (en) * | 1979-02-09 | 1980-08-18 | ||
| JPS5645102U (en) * | 1979-09-17 | 1981-04-23 | ||
| JPS56101405U (en) * | 1979-12-29 | 1981-08-10 | ||
| JPS5888411A (en) * | 1981-11-18 | 1983-05-26 | Nissan Motor Co Ltd | Valve rocker device of internal-combustion engine |
| CN202451225U (en) * | 2012-03-12 | 2012-09-26 | 重庆宗申吕田机械制造有限公司 | Elastic buffering ejector rod for internal combustion engine |
| CN204877573U (en) * | 2015-06-29 | 2015-12-16 | 上海高斯通船舶配件有限公司 | Explosive motor mechanical type valve lift adjusts buffer |
| CN205918458U (en) * | 2016-08-16 | 2017-02-01 | 上海高斯通船舶配件有限公司 | There is buffer function zero clearance internal -combustion engine mechanical type valve tappet |
-
2016
- 2016-08-16 CN CN201610673598.XA patent/CN107762582A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1675954A (en) * | 1924-08-26 | 1928-07-03 | L G Hoxton | Valve-tappet construction |
| JPS5573504U (en) * | 1978-11-17 | 1980-05-21 | ||
| JPS55116803U (en) * | 1979-02-09 | 1980-08-18 | ||
| JPS5645102U (en) * | 1979-09-17 | 1981-04-23 | ||
| JPS56101405U (en) * | 1979-12-29 | 1981-08-10 | ||
| JPS5888411A (en) * | 1981-11-18 | 1983-05-26 | Nissan Motor Co Ltd | Valve rocker device of internal-combustion engine |
| CN202451225U (en) * | 2012-03-12 | 2012-09-26 | 重庆宗申吕田机械制造有限公司 | Elastic buffering ejector rod for internal combustion engine |
| CN204877573U (en) * | 2015-06-29 | 2015-12-16 | 上海高斯通船舶配件有限公司 | Explosive motor mechanical type valve lift adjusts buffer |
| CN205918458U (en) * | 2016-08-16 | 2017-02-01 | 上海高斯通船舶配件有限公司 | There is buffer function zero clearance internal -combustion engine mechanical type valve tappet |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180306 |