CN108194158A - A kind of valve actuating mechanism of cam pack and processing technology and the application cam pack - Google Patents
A kind of valve actuating mechanism of cam pack and processing technology and the application cam pack Download PDFInfo
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- CN108194158A CN108194158A CN201711373330.5A CN201711373330A CN108194158A CN 108194158 A CN108194158 A CN 108194158A CN 201711373330 A CN201711373330 A CN 201711373330A CN 108194158 A CN108194158 A CN 108194158A
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- 229960004011 methenamine Drugs 0.000 claims abstract description 10
- 239000004014 plasticizer Substances 0.000 claims abstract description 8
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- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims abstract description 7
- 239000003999 initiator Substances 0.000 claims abstract description 7
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- 239000012760 heat stabilizer Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 35
- 239000000843 powder Substances 0.000 claims description 31
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 18
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 16
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- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001746 injection moulding Methods 0.000 claims description 10
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- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 claims description 9
- MGFRKBRDZIMZGO-UHFFFAOYSA-N barium cadmium Chemical compound [Cd].[Ba] MGFRKBRDZIMZGO-UHFFFAOYSA-N 0.000 claims description 9
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 9
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 claims description 9
- 229920001451 polypropylene glycol Polymers 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 9
- 239000003351 stiffener Substances 0.000 claims description 9
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 8
- 244000258271 Galium odoratum Species 0.000 claims description 8
- 235000008526 Galium odoratum Nutrition 0.000 claims description 8
- 229920000426 Microplastic Polymers 0.000 claims description 8
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 7
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- 238000010276 construction Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
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- 238000004513 sizing Methods 0.000 claims description 6
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- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 150000002148 esters Chemical class 0.000 claims 1
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 150000002739 metals Chemical class 0.000 description 7
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- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKJADYKTJJGKDX-UHFFFAOYSA-N Butyl pentanoate Chemical compound CCCCOC(=O)CCCC OKJADYKTJJGKDX-UHFFFAOYSA-N 0.000 description 1
- WXQDFOGZIYLEGP-UHFFFAOYSA-N C(C(C)C)#N.C(C(C)C)#N.[N] Chemical compound C(C(C)C)#N.C(C(C)C)#N.[N] WXQDFOGZIYLEGP-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
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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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
-
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- 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
- F01L2301/00—Using particular materials
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
Abstract
The invention discloses the valve actuating mechanisms of a kind of cam pack and processing technology and the application cam pack, it is intended to provide a kind of novel plastic cam pack applied in engine valve actuating mechanism, and the novel plastic cam pack makes engine combustion more abundant, reduce the discharge of engine harmful substance, reduce fuel consumption rate, reduce engine noise, reduce engine operating temperatures, increase service life of aeroengine, its key points of the technical solution are that a kind of cam pack, including mandrel and the plastic cam shaft being coated in mandrel, mandrel is manufactured by metal material, the plastic cam shaft is prepared from the following raw materials in parts by weight：40 parts of PC plastic, 60 parts of ABS plastic, 5 10 parts of carbon fiber, 5 10 parts of glass fibre, 10 15 parts of plasticizer, 45 parts of heat stabilizer, 8 10 parts of filler, 12 parts of initiator, 5 10 parts of Hinered phenols antioxidant, 23 parts of methenamine, 23 parts of siloxanes, the present invention are suitable for engine fittings technical field.
Description
Technical field
The present invention relates to a kind of engine fittings technical field, more specifically, it relates to a kind of cam pack and processing
The valve actuating mechanism of technique and the application cam pack.
Background technology
The valve actuating mechanism of engine is the requirement of working cycles and firing order carried out according to each cylinder of engine,
The inlet and exhaust valve of each cylinder is opened and closed on time, and fresh fuel mixture is sucked into cylinder, and by the exhaust gas after burning from cylinder
The device of interior discharge, existing universal cam component is all metal material in valve actuating mechanism, metal cam axis there are weight weight, into
The problems such as this height, noise is big, and in valve actuating mechanism, power performance, the parts wear feelings of the design of cam profile to engine
Condition has a direct impact, and metal cam axis is influenced by machining accuracy, and consistency is poor, and running temperature is high, easy to wear, easily cold by heat expansion
The problem of contracting, it is difficult to ensure design value of the metal cam in hot molded line.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of be applied in engine valve actuating mechanism
Novel plastic cam pack, and the novel plastic cam pack can reduce the discharge of engine harmful substance, reduce fuel oil
Consumption rate and engine operating temperatures, increase service life of aeroengine, and the use of plastic cam and timing gears effectively reduces
Engine noise.
To achieve the above object, the present invention provides following technical solutions：A kind of cam pack including mandrel and is coated on
Plastic cam shaft in mandrel, mandrel are manufactured by metal material, and the plastic cam shaft is prepared from the following raw materials in parts by weight：
40 parts of PC plastic, 60 parts of ABS plastic, 5-10 parts of carbon fiber, 5-10 parts of glass fibre, 10-15 parts of plasticizer, heat are steady
Determine 4-5 parts of agent, 8-10 parts of filler, 1-2 parts of initiator, 5-10 parts of Hinered phenols antioxidant, 2-3 parts of methenamine, siloxanes 2-3
Part.
The present invention is further arranged to：The plasticizer is by dioctyl phthalate, dibutyl phthalate and gathers
Adipic acid propylene glycol ester by ratio of weight and the number of copies 2:2:1 composition；
The heat stabilizer is by barium cadmium stabilizer and maleic acid tin octylate score ratio 1 by weight:1 composition；
The filler is by calcium carbonate and polytetrafluoroethylene powder by ratio of weight and the number of copies 3:1 composition；
The initiator is azodiisobutyronitrile；
The Hinered phenols antioxidant is 2,6- di-tert-butyl-4-methy phenols.
The present invention is further arranged to：The plastic cam shaft is made by following raw material：
40 parts of PC plastic, 60 parts of ABS plastic, 8 parts of carbon fiber, 8 parts of glass fibre, 4 parts of dioctyl phthalate, adjacent benzene
4 parts of dibutyl carboxylic acid, 2 parts of polypropylene glycol adipate, 2 parts of barium cadmium stabilizer, 2 parts of maleic acid tin octylate, 6 parts of calcium carbonate
With 2 parts of polytetrafluoroethylene powder, 3 parts of stearic acid, 1 part of azodiisobutyronitrile, 2,6- 6 parts of di-tert-butyl-4-methy phenols, Wu Luotuo
3 parts of product, 3 parts of siloxanes.
A kind of processing technology for processing the cam pack, includes the following steps：
First, it grinds：PC plastic, ABS plastic, carbon fiber and glass fibre are separately added into grind into powder in ball mill,
PC plastic and ABS plastic cross 50 mesh sieve, and carbon fiber and glass fibre cross 80 mesh sieve, and powder is dried；
2nd, mixing granulator：PC plastic powder, carbon fiber powder, barium cadmium stabilizer and calcium carbonate Hybrid Heating are stirred 5
Minute, heating temperature is 60 DEG C, and PC mixtures are made；By ABS plastic powder, glass fibre powder, maleic acid tin octylate and gather
Tetrafluoroethene powder Hybrid Heating stirs 6 minutes, and heating temperature is 50 DEG C, and ABS mixtures are made；PC mixtures and ABS are mixed
Object carries out being kneaded 20 minutes respectively；PC mixtures and ABS mixtures are mixed and are kneaded 30 minutes, adds phthalic acid
Dioctyl ester, dibutyl phthalate, polypropylene glycol adipate, methenamine and siloxanes are kneaded 6 minutes, are eventually adding idol
Nitrogen bis-isobutyronitrile and 2,6- di-tert-butyl-4-methy phenol are kneaded 10 minutes, the sizing material of system；Sizing material is granulated by extruder,
It is spare to obtain plastic pellet；
3rd, injection molding：Plastic pellet is added in into injection molding machine, the cavity of injection mold includes a gear cavity and two cams
Chamber, and a gear cavity and two cam chambers integrally connect, metal mandrel is placed at cavity center, and injection is formed and is coated on outside metal mandrel
The plastic cam axle construction of wall, plastic cam axle construction include integrally formed plastic gear, exhaust cam and admission cam.
Including crankcase and cylinder, plastics are equipped in crankcase for a kind of valve actuating mechanism using the cam pack
Cam pack and bent axle, plastic cam component include plastic gear, exhaust cam and admission cam, and bent axle is equipped with timing gear
Wheel, plastic gear is meshed with timing gears, and tappet is equipped on exhaust cam and admission cam, be additionally provided in cylinder push rod,
Rocking arm and valve, tappet, push rod, rocking arm and valve are sequentially connected, and combustion chamber is additionally provided in cylinder, and the head of valve is placed in burning
It is indoor.
The present invention is further arranged to：The through-hole passed through for valve is equipped in the cylinder, is equipped between through-hole and valve
First mechanical seal, the outer wall of through-hole are equipped with step groove and valve spring, and valve is equipped with card slot, card close to one end of rocking arm
Be connected with spring holder on slot, valve spring one end is contradicted with step groove, and the other end and the spring holder of valve spring contradict, through-hole with
The connecting pin of combustion chamber is equipped with the second mechanical seal.
The present invention is further arranged to：Locating plate is equipped in the cylinder, locating plate is fixed with cylinder by screw, is positioned
On piece is equipped with the location hole passed through for push rod.
The present invention is further arranged to：The material of the timing gears is plastics, and timing gears include gear, are placed in
The stiffener plate of gear side, side of the stiffener plate far from gear are equipped with the semicircle for being clamped with bent axle
Key, gear, stiffener plate and woodruff key are integrally formed, and several spline tooths are additionally provided on the axis hole wall of gear.
By using above-mentioned technical proposal, have the advantages that：Using plastic cam made from above-mentioned plastic material
Component opposing metallic material cost can reduce by 50%；Plastic pellet can manufacture in advance it is spare, manufacture plastic cam component when at any time
It takes, and plastic cam component, by injection molding, technique is simplified, precision is more easily controlled；Above-mentioned novel plastic cam material
Design value of the cam in hot lower profile has been completely secured, engine breathing time and intake and exhaust can be effectively controlled
Amount, and the discharge of engine harmful substance is reduced, fuel consumption rate is reduced, since engine exhaust is more satisfactory, makes hair
Motivation temperature reduces, and service life increases 30-35%.
Description of the drawings
Fig. 1 is a kind of structure diagram of valve actuating mechanism embodiment using cam pack of the invention.
Fig. 2 is a kind of structure diagram of cam pack of the present invention.
Fig. 3 is the structure diagram of timing gears in a kind of valve actuating mechanism of the application cam pack of the present invention.
Fig. 4 is the pattern curve of cam profile in valve actuating mechanism of the present invention.
Fig. 5 is the lift of cam profile, speed, accelerating curve in valve actuating mechanism of the present invention.
Fig. 6 is the error curve of cam profile in valve actuating mechanism of the present invention.
Fig. 7 is the pattern curve of conventional metals cam profile.
Fig. 8 is the lift, speed, accelerating curve of conventional metals cam profile.
Fig. 9 is the error curve of conventional metals cam profile.
Specific embodiment
A kind of cam pack, including mandrel and the plastic cam shaft being coated in mandrel, mandrel is manufactured by metal material, institute
Plastic cam shaft is stated to be prepared from the following raw materials in parts by weight：
40 parts of PC plastic, 60 parts of ABS plastic, 5-10 parts of carbon fiber, 5-10 parts of glass fibre, 10-15 parts of plasticizer, heat are steady
Determine 4-5 parts of agent, 8-10 parts of filler, 1-2 parts of initiator, 5-10 parts of Hinered phenols antioxidant, 2-3 parts of methenamine, siloxanes 2-3
Part.
Plasticizer by dioctyl phthalate, dibutyl phthalate and polypropylene glycol adipate in parts by weight
Than 2:2:1 composition；
Heat stabilizer is by barium cadmium stabilizer and maleic acid tin octylate score ratio 1 by weight:1 composition；
The filler is by calcium carbonate and polytetrafluoroethylene powder by ratio of weight and the number of copies 3:1 composition；
The initiator is azodiisobutyronitrile；
The Hinered phenols antioxidant is 2,6- di-tert-butyl-4-methy phenols.
Embodiment one,
A kind of processing technology for processing the cam pack, includes the following steps：
First, dispensing：40 parts of PC plastic, 60 parts of ABS plastic, 8 parts of carbon fiber, 8 parts of glass fibre, dioctyl phthalate
4 parts, 4 parts of dibutyl phthalate, 2 parts of polypropylene glycol adipate, 2 parts of barium cadmium stabilizer, 2 parts of maleic acid tin octylate, carbon
2 parts of 6 parts of sour calcium and polytetrafluoroethylene powder, 1 part of azodiisobutyronitrile, 2,6- 6 parts of di-tert-butyl-4-methy phenols, methenamine 3
Part, 3 parts of siloxanes；
2nd, it grinds：PC plastic, ABS plastic, carbon fiber and glass fibre are separately added into grind into powder in ball mill,
PC plastic and ABS plastic cross 50 mesh sieve, and carbon fiber and glass fibre cross 80 mesh sieve, and powder is dried；
By being ground up, sieved, make above-mentioned raw materials finer and smoother, after mixed milling more uniformly, moisture content is reduced by drying and is contained
Amount avoids PC plastic from generating hydrolysis phenomena.
3rd, mixing granulator：PC plastic powder, carbon fiber powder, barium cadmium stabilizer and calcium carbonate Hybrid Heating are stirred 5
Minute, heating temperature is 60 DEG C, and PC mixtures are made；By ABS plastic powder, glass fibre powder, maleic acid tin octylate and gather
Tetrafluoroethene powder Hybrid Heating stirs 6 minutes, and heating temperature is 50 DEG C, and ABS mixtures are made；PC mixtures and ABS are mixed
Object, which is respectively put into kneading machine, to carry out being kneaded 20 minutes under the rotating speed of 450r/min, and melting temperature is 120 DEG C；By PC mixtures
Addition double screw extruder is mixed with ABS mixtures to be kneaded together 30 minutes, adds dioctyl phthalate, O-phthalic
Dibutyl phthalate, polypropylene glycol adipate, methenamine and siloxanes are kneaded 6 minutes, are eventually adding azodiisobutyronitrile and 2,
6- di-tert-butyl-4-methy phenols are kneaded 10 minutes, the sizing material of system, and each area's temperature control is between 240-250 DEG C, screw speed
Control is in 450-480r/min；Sizing material by extruder is granulated, it is spare to obtain plastic pellet；
Carbon fiber and glass fibre can improve the comprehensive strength for improving product；Calcium carbonate carries for improving processing performance
The lustrous surface and profile pattern of high product；Polytetrafluoroethylene powder plays antifriction, fire-retardant effect；Plasticizer is by O-phthalic
Dioctyl phthalate, dibutyl phthalate and polypropylene glycol adipate by ratio of weight and the number of copies 2:2:1 composition, increases its flexibility
By force, molding effect is more preferable；Methenamine is mainly used as curing agent；Siloxanes is used to improve anti-flammability.
PC mixtures and ABS mixtures are stirred respectively and are kneaded respectively again, makes carbon fiber powder and PC plastic
Preferably fusion, makes glass fibre powder preferably be merged with ABS plastic powder, and fiber dust is avoided to influence the flowing of plastics
Property, finally PC mixtures and ABS mixtures are mixed mixing extrusion plastic pellet, are easy to the injection molding of injection molding machine, is noted
Plastic cam assembly property is more stablized after being moulded into type.
4th, injection molding：Plastic pellet is added in into injection molding machine, the cavity of injection mold includes a gear cavity and two cams
Chamber, and a gear cavity and two cam chambers integrally connect, metal mandrel is placed at cavity center, and injection is formed and is coated on outside metal mandrel
The plastic cam axle construction of wall, plastic cam axle construction include integrally formed plastic gear, exhaust cam and admission cam.
As shown in Figures 1 to 3：A kind of valve actuating mechanism using above-mentioned cam pack, including crankcase 1 and cylinder 2, bent axle
Plastic cam component 3 and bent axle 4 are equipped in babinet 1, it is convex that plastic cam component 3 includes plastic gear 5, exhaust cam 6 and air inlet
Wheel 7, bent axle 4 are equipped with timing gears 8, and plastic gear 5 is meshed with timing gears 8, on exhaust cam 6 and admission cam 7
Equipped with tappet 9, push rod 10, rocking arm 11 and valve 12 are additionally provided in cylinder 2, tappet 9, push rod 10, rocking arm 11 and valve 12 are successively
Connection, tappet 9, push rod 10, rocking arm 11 and valve 12 are two, therefore valve 12 includes exhaust valve and inlet valve passes through respectively
Exhaust cam 6 and admission cam 7 are driven, and combustion chamber 13 is additionally provided in cylinder 2, and the head of valve 12 is placed in combustion chamber 13, institute
The through-hole for being equipped in cylinder 2 and being passed through for valve 12 is stated, the first mechanical seal 14, the outer wall of through-hole are equipped between through-hole and valve 12
Step groove and valve spring 15 are equipped with, valve 12 is equipped with card slot close to one end of rocking arm 11, spring holder is connected on card slot
16,15 one end of valve spring is contradicted with step groove, and the other end and the spring holder 16 of valve spring 15 contradict, through-hole and combustion chamber 13
Connecting pin be equipped with the second mechanical seal 17, the first mechanical seal 14 can increase stable transmission of the valve 12 in cylinder 2
Property, it can also increase the leakproofness between valve 12 and through-hole, the second mechanical seal 17 can increase sealing when valve 12 is closed
Property.
12 valve actuating mechanism of overhead valve according to 2 course of work of cylinder requirement, on schedule by cam drive tappet 9, very
9 actuator push rod 10 of column, push rod 10 push rocking arm 11, and rocking arm 11 and valve spring 15 control the opening and closing of inlet and outlet door, induction stroke
In, inlet valve is opened, and exhaust valve closing, descent of piston sucks burning mixture into cylinder 2：In compression stroke, inlet valve
It closes, exhaust valve closing, engine relies on flywheel inertia, and piston stroking upward compresses burning mixture；Workmanship stroke, inlet valve
It closes, exhaust valve closing, burning mixture is ignited, and descent of piston is promoted to do work；Exhaust stroke, IC Intake Valve Closes, exhaust
Door is opened, and engine relies on flywheel inertia belt piston uplink, and exhaust gas is discharged.
Locating plate 18 is equipped in the cylinder 2, locating plate 18 is fixed with cylinder 2 by screw, and locating plate 18, which is equipped with, to be supplied
The location hole that push rod 10 passes through, locating plate 18 can increase the stability in 10 motion process of push rod.
The material of the timing gears 8 is plastics, can be traditional plastics, can also be used above-mentioned for machining cam
The novel plastic of component, timing gears 8 include gear 20, the stiffener plate 21 for being placed in 20 side of gear, reinforcing rib
Plate 21 is connected with the gear teeth in gear 20, improves intensity, reduces the hidden danger for collapsing tooth, stiffener plate 21 is far from gear
20 side is equipped with the woodruff key 22 for being clamped with bent axle 4, and woodruff key 22 can be clamped with the card slot on bent axle 4, improves just
When gear 8 and bent axle 4 circumferential stress intensity, and the axis hole wall of gear 20 is equipped with the limiting section being connect with woodruff key 22
24, limiting section 24 can further be clamped with bent axle 4 and improve circumferential stress intensity, and edge is equipped on woodruff key 22 and limiting section 24
The arc groove 25 that timing gears 8 are axially set, arc groove 25 can reduce deflection when timing gears 8 are molded, gear
20th, 22 integrated injection molding of stiffener plate 21 and woodruff key, processing is simple, and intensity is high, on the axis hole wall of gear 20 also
Equipped with several spline tooths 23, spline tooth 23 is equidistantly arranged around the axis hole wall of gear 20, and spline tooth 23 is adapted to bent axle 4,
Deformation slot is formed between two adjacent spline tooths 23, reduces deflection when timing gears 8 are molded, improves the precision of timing gears 8.
By testing the valve actuating mechanism in embodiment one and conventional metals component cam engine correlated performance, make
Following table one is obtained to table six：
Conventional metals component cam engine performance, table one：
Conventional metals component cam engine emission test, table two：
Conventional metals cam pack engine emission test result, table three：
Novel plastic cam pack engine start machine the performance test results, table four：
Novel plastic cam pack engine emission is tested, table five：
Novel plastic cam pack engine emission test result, table six：
The function of valve actuating mechanism is the job order and the course of work according to engine, time opening or close inlet valve and
Exhaust valve makes combustion mixture or air enter cylinder, and exhaust gas is made to be discharged out of cylinder, realization scavenging period, and cam type
The precision of line directly affects distribution effect, in order to improve the air inflow of engine and capacity, and makes exhaust fully thorough,
The molded line of cam must be also ideal under hot, and can obtain this novel plastic cam material by Fig. 6 to Fig. 9 is completely secured
Design value of the cam in hot lower profile, is effectively controlled engine breathing time and intake and exhaust amount, and pass through table one
The discharge of engine harmful substance can be reduced to table six, has reduced fuel consumption rate, since engine exhaust is relatively managed
Think, reduce engine temperature, life 30-35%.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, and those skilled in the art exists
Common variations and alternatives are carried out in the range of technical solution of the present invention should all include within the scope of the present invention.
Claims (8)
1. a kind of cam pack, it is characterized in that：Including mandrel and the plastic cam shaft being coated in mandrel, mandrel is by metal material
Manufacture, the plastic cam shaft are prepared from the following raw materials in parts by weight：
40 parts of PC plastic, 60 parts of ABS plastic, 5-10 parts of carbon fiber, 5-10 parts of glass fibre, 10-15 parts of plasticizer, heat stabilizer
4-5 parts, 8-10 parts of filler, 3-5 parts of stearic acid, 1-2 parts of initiator, 5-10 parts of Hinered phenols antioxidant, 2-3 parts of methenamine,
2-3 parts of siloxanes.
2. a kind of cam pack according to claim 1, it is characterized in that：
The plasticizer by dioctyl phthalate, dibutyl phthalate and polypropylene glycol adipate in parts by weight
Than 2:2:1 composition；
The heat stabilizer is by barium cadmium stabilizer and maleic acid tin octylate score ratio 1 by weight:1 composition；
The filler is by calcium carbonate and polytetrafluoroethylene powder by ratio of weight and the number of copies 3:1 composition；
The initiator is azodiisobutyronitrile；
The Hinered phenols antioxidant is 2,6- di-tert-butyl-4-methy phenols.
3. a kind of cam pack according to claim 2, it is characterized in that：The plastic cam shaft presses following raw material
It is made：
40 parts of PC plastic, 60 parts of ABS plastic, 8 parts of carbon fiber, 8 parts of glass fibre, 4 parts of dioctyl phthalate, O-phthalic
4 parts of dibutyl phthalate, 2 parts of polypropylene glycol adipate, 2 parts of barium cadmium stabilizer, 2 parts of maleic acid tin octylate, 6 parts of calcium carbonate and poly-
2 parts of tetrafluoroethene powder, 1 part of azodiisobutyronitrile, 2,6- 6 parts of di-tert-butyl-4-methy phenols, 3 parts of methenamine, siloxanes 3
Part.
4. a kind of processing technology for processing cam pack described in claim 3, it is characterized in that：Include the following steps：
First, it grinds：PC plastic, ABS plastic, carbon fiber and glass fibre are separately added into grind into powder in ball mill, PC modelings
Material and ABS plastic cross 50 mesh sieve, and carbon fiber and glass fibre cross 80 mesh sieve, and powder is dried；
2nd, mixing granulator：PC plastic powder, carbon fiber powder, barium cadmium stabilizer and calcium carbonate Hybrid Heating are stirred 5 minutes,
Heating temperature is 60 DEG C, and PC mixtures are made；By ABS plastic powder, glass fibre powder, maleic acid tin octylate and polytetrafluoroethyl-ne
Alkene powder Hybrid Heating stirs 6 minutes, and heating temperature is 50 DEG C, and ABS mixtures are made；PC mixtures and ABS mixtures are distinguished
Be kneaded 20 minutes；PC mixtures and ABS mixtures are mixed and are kneaded 30 minutes, it is pungent to add phthalic acid two
Ester, dibutyl phthalate, polypropylene glycol adipate, methenamine and siloxanes are kneaded 6 minutes, are eventually adding azo two
Isobutyronitrile and 2,6- di-tert-butyl-4-methy phenol are kneaded 10 minutes, the sizing material of system；Sizing material by extruder is granulated, is obtained
Plastic pellet is spare；
3rd, injection molding：Plastic pellet is added in into injection molding machine, the cavity of injection mold includes a gear cavity and two cam chambers, and
One gear cavity and two cam chambers integrally connect, and metal mandrel is placed at cavity center, and injection forms and is coated on metal mandrel outer wall
Plastic cam axle construction, plastic cam axle construction include integrally formed plastic gear, exhaust cam and admission cam.
5. a kind of valve actuating mechanism that cam pack is made using processing technology described in claim 4, it is characterized in that：Including crankcase
Body（1）And cylinder（2）, crankcase（1）It is interior to be equipped with plastic cam component（3）And bent axle（4）, plastic cam（3）Component includes
Plastic gear（5）, exhaust cam（6）And admission cam（7）, bent axle（4）It is equipped with timing gears（8）, plastic gear（5）With just
When gear（8）It is meshed, exhaust cam（6）And admission cam（7）On be equipped with tappet（9）, cylinder（2）Inside it is additionally provided with push rod
（10）, rocking arm（11）And valve（12）, tappet（9）, push rod（10）, rocking arm（11）And valve（12）It is sequentially connected, cylinder（12）
Inside it is additionally provided with combustion chamber（13）, valve（12）Head be placed in combustion chamber（13）It is interior.
6. a kind of valve actuating mechanism according to claim 5, it is characterized in that：The cylinder（2）It is interior to be equipped with for valve（12）It wears
The through-hole crossed, through-hole and valve（12）Between be equipped with the first mechanical seal（14）, the outer wall of through-hole is equipped with step groove and valve
Spring（15）, valve（12）Close to rocking arm（11）One end be equipped with card slot, be connected with spring holder on card slot（16）, valve spring
（15）One end is contradicted with step groove, valve spring（15）The other end and spring holder（16）It contradicts, through-hole and combustion chamber（13）'s
Connecting pin is equipped with the second mechanical seal（17）.
7. a kind of valve actuating mechanism according to claim 5, it is characterized in that：The cylinder（2）It is interior to be equipped with locating plate（18）, it is fixed
Bit slice（18）With cylinder（2）It is fixed by screw, locating plate（18）It is equipped with for push rod（10）The location hole passed through.
8. a kind of valve actuating mechanism according to claim 5, it is characterized in that：The timing gears（8）Material for plastics, just
When gear（8）Including gear（20）, be placed in gear（20）The stiffener plate of side（21）, stiffener plate（21）It is separate
Gear（20）Side be equipped with for the woodruff key that is clamped with bent axle（22）, gear（20）, stiffener plate（21）
And woodruff key（22）It is integrally formed, gear（20）Axis hole wall on be additionally provided with several spline tooths（23）.
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| CN201711373330.5A CN108194158B (en) | 2017-12-19 | 2017-12-19 | Cam assembly, processing technology and valve mechanism using cam assembly |
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| CN201711373330.5A CN108194158B (en) | 2017-12-19 | 2017-12-19 | Cam assembly, processing technology and valve mechanism using cam assembly |
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