CN109139829A - Low friction timing chain transmission device - Google Patents
Low friction timing chain transmission device Download PDFInfo
- Publication number
- CN109139829A CN109139829A CN201811139556.3A CN201811139556A CN109139829A CN 109139829 A CN109139829 A CN 109139829A CN 201811139556 A CN201811139556 A CN 201811139556A CN 109139829 A CN109139829 A CN 109139829A
- Authority
- CN
- China
- Prior art keywords
- chain
- guide rail
- rail
- timing chain
- piece
- 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
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 21
- 239000002131 composite material Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 2
- 239000004744 fabric Substances 0.000 claims 1
- -1 polytetrafluoroethylene Polymers 0.000 claims 1
- 230000006870 function Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/06—Gearings for conveying rotary motion by endless flexible members with chains
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/348—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear by means acting on timing belts or chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G13/00—Chains
- F16G13/02—Driving-chains
- F16G13/06—Driving-chains with links connected by parallel driving-pins with or without rollers so called open links
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G15/00—Chain couplings, Shackles; Chain joints; Chain links; Chain bushes
- F16G15/12—Chain links
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/18—Means for guiding or supporting belts, ropes, or chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/18—Means for guiding or supporting belts, ropes, or chains
- F16H2007/185—Means for guiding or supporting belts, ropes, or chains the guiding surface in contact with the belt, rope or chain having particular shapes, structures or materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention discloses a kind of low friction timing chain transmission devices, positioning guide rail including timing chain and for limiting timing chain motion profile, positioning guide rail includes upper rail, determines guide rail and movable guiding rail, the interior concavity factor of the upper rail is 1~3%, the interior concavity factor for determining guide rail is 3~6%, and the interior concavity factor of the movable guiding rail is 6~13%.Above scheme is optimized by the interior concavity factor to positioning guide rail and chain contact surface, so that normal pressure when chain is contacted with positioning guide rail greatly reduces, to effectively reduce frictional resistance, reduces friction loss.
Description
Technical field
The present invention relates to technical field of engines, and in particular to a kind of low friction timing chain transmission device of engine.
Background technique
In recent years, the timing transmission of automobile engine uses chain conveyer more and more widely, because its with it is compact-sized,
Transmit the remarkable advantages such as power high, reliability and wearability height, design type multiplicity.Timing chain transmission device is connected by chain
Crankshaft sprocket and the rotation of camshaft sprocket drive cam shaft, it is ensured that relativeness between the opening and closing moment and crank rotation angle of valve
It is stably and controllable.The valve actuating mechanism that engine is driven using timing chain makes the inlet and outlet door of engine in due course
It opens or closes, to guarantee that the cylinder of engine being capable of normally air-breathing and exhaust.
Timing chain transmission device generally comprises chain, guide rail (including dynamic guide rail, determine guide rail and upper rail) and hydraulic
Tight device, studies have shown that the friction loss accounting of each kinematic pair is as follows: chain and guide rail in engine timing chain and sprocket driving device
Friction loss between face accounts for 40%~50%, and friction loss accounts for 20% between chain itself chain piece and pin shaft, chain piece and chain piece
~30%, the engaging friction loss of chain and sprocket wheel accounts for 15% or so, other friction losses account for 5% or so.
In the prior art, the timing chain transmission device of passenger vehicle engine generallys use mute chain conveyer design, with hair
The load of motivation timing transmission increases (such as timing chain needs VVT in drive cam shaft, high pressure fuel pump high load components), right
Timing chain tensile strength proposes requirements at the higher level, in order to guarantee chain tensile strength, the chain piece quantity of usually each chain link use
It is 4 × 4 or 4 × 5, chain the piece number is more, and the contact area of each chain link and guide rail is bigger, the friction resistance of relative motion between chain piece
Power also increases more.Timing transmission load simultaneously increases, it usually needs increases stretcher tension and damping to meet drive system
Function causes chain to increase rail pressure obvious in this way, and the friction loss between chain and guide pass is bigger.
Summary of the invention
The object of the present invention is to provide a kind of low friction timing chain transmission devices, to reduce the friction in timing driving system
Loss.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of low friction timing chain transmission device, including just
When chain and the positioning guide rail for limiting timing chain motion profile, positioning guide rail include upper rail, determine guide rail and movable guiding rail,
Be characterized in that: the interior concavity factor of the upper rail is 1~3%, and the interior concavity factor for determining guide rail is 3~6%, the movable guiding rail
Interior concavity factor is 6~13%.
Above scheme is optimized by the interior concavity factor to positioning guide rail and chain contact surface, so that chain and positioning
Normal pressure when guide rail contact greatly reduces, to effectively reduce frictional resistance, reduces friction loss.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is simplification figure of the invention；
Fig. 3 is the main view of timing chain link units；
Fig. 4 is the top view of timing chain link units.
Specific embodiment
In conjunction with attached drawing, a kind of low friction timing chain transmission device, including timing chain 10 and for limit timing chain 10 move
The positioning guide rail of track, positioning guide rail include upper rail 20, determine guide rail 30 and movable guiding rail 40, the interior concavity factor of the upper rail 20
It is 1~3%, the interior concavity factor for determining guide rail 30 is 3~6%, and the interior concavity factor of the movable guiding rail 40 is 6~13%.The present invention
Core be to be optimized by the interior concavity factor to positioning guide rail and chain contact surface so that chain is contacted with positioning guide rail
When normal pressure greatly reduce, to effectively reduce frictional resistance, reduce friction loss.
It is 2.3% that more preferably scheme, which is the interior concavity factor of upper rail 20, and the interior concavity factor for determining guide rail 30 is 5.7%, activity
The interior concavity factor of guide rail 40 is 11.9%.
It should be noted that the contact site of positioning guide rail and chain is integrally in cambered surface, as shown in Fig. 2, positioning guide rail with
The section of the contact site of chain is a camber line, and interior concavity factor expression formula is H/L*100%, wherein H is that camber line highest point is arrived
The distance of straight line where two-end-point；L is the distance between camber line two-end-point.
Further, the chain piece for constituting 10 link units of timing chain is a plate, the wheel of chain piece and positioning guide rail contact side
It is wide whole arc-shaped.The profile of chain piece and positioning guide rail contact side is designed into camber, timing chain is effectively reduced and is led with positioning
Contact surface area when rail contacts, reduces the friction between timing chain and positioning guide rail, reduces friction loss.
Preferably, the link units of the timing chain 10 include preceding pitch chain piece 11 and rear pitch chain piece 12, preceding 11 He of pitch chain piece
The rear and front end of pitch chain piece 12 offers connecting hole afterwards, and the rear end of preceding pitch chain piece 11 and the front end-plate face paste of rear pitch chain piece 12 are leaned on
And corresponding connecting hole same core is arranged and is connected by pin shaft 14；There are two the preceding pitch chain pieces 11, and rear pitch chain piece 12 is arranged in
The centre of two preceding pitch chain pieces 11, the outside of two preceding pitch chain pieces 11 there also is provided carrier bar 13, and 13 both ends of carrier bar offer connection
Hole, the front end of carrier bar 13 is leaned on the end plate face paste of preceding pitch chain piece 11 and corresponding connecting hole same core is arranged, 13 rear end of carrier bar
The connecting hole same core of connecting hole and rear 12 rear end of pitch chain piece arranges that pin shaft 14 passes through carrier bar 13, preceding pitch chain piece 11 and rear pitch chain piece
12 connecting hole constitutes articulated connection.Each link units are using pitch chain piece 12 after two preceding pitch chain pieces 11, one and two
The connection of carrier bar 13, compared with the existing technology in multichain piece link units for, between chain piece and chain piece and chain piece and pin
Frictional resistance between axis greatly reduces.The timing chain 10 constituted using above-mentioned link units, effectively reduces transmission device
The friction loss of middle timing chain 10 itself.
Preferably, the upper rail 20, determine guide rail 30 and movable guiding rail 40 is all made of polyamide and polytetrafluoroethyl-ne
The composite material of alkene.For traditional PA66 nylon material, polyamide and ptfe composite toughness
More preferably, rigidity is higher, and especially under the high temperature conditions, the micro-rough face that higher rigidity and toughness can reduce chain piece back is embedding
Enter into guide material, improve the insertion characteristic of chain piece and composite material, that is, the secondary coefficient of friction that rubs is low, to reduce contact
Face frictional resistance.
Further, the upper end of the movable guiding rail 40 is hingedly arranged on cylinder body, and lower end is equipped with hydraulic tensioner 50, liquid
Press stretcher 50 and movable guiding rail 40 against provide movable guiding rail 40 to timing chain 10 close to tensile force.When it is implemented, liquid
It presses stretcher 50 to select the stretcher for having check valve oil draining function, stretches out process in low engine speeds or plunger in this way
In, plunger inner engine oil passes through by-pass prot pressure release；Under the high revolving speed plunger rollback situation of engine, plunger inner engine oil pressure increases
Add, draining check valve is opened, and reduces oil pressure in plunger quickly, reduces damping when plunger retracts, to reduce chain tension
The frictional resistance of function is passed with chain.
Above scheme is applied in engine timing system, frictional resistance moment can be reduced to 1.7Nm or so by 2.1Nm,
System friction loses fall up to 20%, and friction loss is substantially reduced effect.Frictional resistance moment decreasing value is scaled hair
Motivation oil consumption, then engine consumption reduces about 0.8%.
Claims (7)
1. a kind of low friction timing chain transmission device, including timing chain (10) and for limiting determining for timing chain (10) motion profile
Position guide rail, positioning guide rail include upper rail (20), determine guide rail (30) and movable guiding rail (40), it is characterised in that: the upper rail
(20) interior concavity factor is 1~3%, and the interior concavity factor for determining guide rail (30) is 3~6%, the interior concavity factor of the movable guiding rail (40)
It is 6~13%.
2. low friction timing chain transmission device according to claim 1, it is characterised in that: the indent of the upper rail (20)
Rate is 2.3%, and the interior concavity factor for determining guide rail (30) is 5.7%, and the interior concavity factor of movable guiding rail (40) is 11.9%.
3. low friction timing chain transmission device according to claim 1 or 2, it is characterised in that: constitute timing chain (10) chain
The chain piece for saving unit is a plate, and chain piece and the profile of positioning guide rail contact side are integrally arc-shaped.
4. low friction timing chain transmission device according to claim 3, it is characterised in that: the chain link of the timing chain (10)
Unit includes preceding pitch chain piece (11) and rear pitch chain piece (12), and the rear and front end of preceding pitch chain piece (11) and rear pitch chain piece (12) opens up
There is connecting hole, the rear end of preceding pitch chain piece (11) is leaned on the front end-plate face paste of rear pitch chain piece (12) and corresponding connecting hole same core is arranged
And it is connected by pin shaft (14).
5. low friction timing chain transmission device according to claim 4, it is characterised in that: the preceding pitch chain piece (11) has
Two, rear pitch chain piece (12) is arranged in the centre of two preceding pitch chain pieces (11), there also is provided on the outside of two preceding pitch chain pieces (11)
Carrier bar (13), carrier bar (13) both ends offer connecting hole, and the front end of carrier bar (13) and the end plate face paste of preceding pitch chain piece (11) are leaned on
And corresponding connecting hole same core arrangement, the connecting hole same core cloth of the connecting hole of carrier bar (13) rear end and rear pitch chain piece (12) rear end
It sets, the connecting hole that pin shaft (14) passes through carrier bar (13), preceding pitch chain piece (11) and rear pitch chain piece (12) constitutes articulated connection.
6. low friction timing chain transmission device according to claim 1 or 2, it is characterised in that: the upper rail (20) is determined
Guide rail (30) and movable guiding rail (40) are all made of the composite material of polyamide and polytetrafluoroethylene (PTFE).
7. low friction timing chain transmission device according to claim 1 or 2, it is characterised in that: the movable guiding rail (40)
Upper end be hingedly arranged on cylinder body, lower end is equipped with hydraulic tensioner (50), and hydraulic tensioner (50) supports with movable guiding rail (40)
By provide movable guiding rail (40) to timing chain (10) close to tensile force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139556.3A CN109139829A (en) | 2018-09-28 | 2018-09-28 | Low friction timing chain transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139556.3A CN109139829A (en) | 2018-09-28 | 2018-09-28 | Low friction timing chain transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109139829A true CN109139829A (en) | 2019-01-04 |
Family
ID=64813239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811139556.3A Pending CN109139829A (en) | 2018-09-28 | 2018-09-28 | Low friction timing chain transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109139829A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110069855A (en) * | 2019-04-22 | 2019-07-30 | 四川大学 | Engine timing transmission system Design Optimization for Vibration method containing non-circular crankshaft pulley |
| CN110657197A (en) * | 2019-10-28 | 2020-01-07 | 中国第一汽车股份有限公司 | Design method of timing tooth-shaped chain system |
| CN111706652A (en) * | 2020-06-30 | 2020-09-25 | 吉林大学 | Double-plunger tensioning system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3441009A (en) * | 1966-10-20 | 1969-04-29 | Renzo Rafanelli | Device for the automatic regulation of the timing of the inlet and exhaust valves of a four-cycle internal combustion engine |
| CN101363335A (en) * | 2008-09-03 | 2009-02-11 | 奇瑞汽车股份有限公司 | Timing chain-driven and engine oil pump drive system |
| CN201496113U (en) * | 2009-08-28 | 2010-06-02 | 浙江吉利汽车研究院有限公司 | Correct time chain driving system of engine |
| CN103244609A (en) * | 2012-02-03 | 2013-08-14 | 株式会社椿本链条 | Chain |
| CN104565205A (en) * | 2014-12-25 | 2015-04-29 | 杭州持正科技有限公司 | Motorcycle engine timing system transmission chain |
| CN205101065U (en) * | 2015-11-23 | 2016-03-23 | 沈阳新光华翔汽车发动机制造有限公司 | Automobile engine variable valve governing system in right time |
-
2018
- 2018-09-28 CN CN201811139556.3A patent/CN109139829A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3441009A (en) * | 1966-10-20 | 1969-04-29 | Renzo Rafanelli | Device for the automatic regulation of the timing of the inlet and exhaust valves of a four-cycle internal combustion engine |
| CN101363335A (en) * | 2008-09-03 | 2009-02-11 | 奇瑞汽车股份有限公司 | Timing chain-driven and engine oil pump drive system |
| CN201496113U (en) * | 2009-08-28 | 2010-06-02 | 浙江吉利汽车研究院有限公司 | Correct time chain driving system of engine |
| CN103244609A (en) * | 2012-02-03 | 2013-08-14 | 株式会社椿本链条 | Chain |
| CN104565205A (en) * | 2014-12-25 | 2015-04-29 | 杭州持正科技有限公司 | Motorcycle engine timing system transmission chain |
| CN205101065U (en) * | 2015-11-23 | 2016-03-23 | 沈阳新光华翔汽车发动机制造有限公司 | Automobile engine variable valve governing system in right time |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110069855A (en) * | 2019-04-22 | 2019-07-30 | 四川大学 | Engine timing transmission system Design Optimization for Vibration method containing non-circular crankshaft pulley |
| CN110657197A (en) * | 2019-10-28 | 2020-01-07 | 中国第一汽车股份有限公司 | Design method of timing tooth-shaped chain system |
| CN111706652A (en) * | 2020-06-30 | 2020-09-25 | 吉林大学 | Double-plunger tensioning system |
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|---|---|---|---|
| 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 |
Application publication date: 20190104 |