CN209483450U - A kind of engine timing chain drive system - Google Patents
A kind of engine timing chain drive system Download PDFInfo
- Publication number
- CN209483450U CN209483450U CN201920010307.8U CN201920010307U CN209483450U CN 209483450 U CN209483450 U CN 209483450U CN 201920010307 U CN201920010307 U CN 201920010307U CN 209483450 U CN209483450 U CN 209483450U
- Authority
- CN
- China
- Prior art keywords
- plunger
- dynamic rail
- spring
- timing chain
- drive system
- 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.)
- Active
Links
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The utility model discloses a kind of engine timing chain drive system, it include: intake-side camshaft sprocket wheel, exhaust side camshaft sprocket wheel, crankshaft sprocket, it is wound around intake-side camshaft sprocket wheel, timing chain on exhaust side camshaft sprocket wheel and crankshaft sprocket, it is close to the dynamic rail of timing chain, and hold out against the timing stretcher of dynamic rail, timing stretcher includes stretcher shell, stretcher shell is equipped with multiple for accommodating the plunger hydraulic chamber of liquid, and the bottom of each plunger hydraulic chamber is provided with a check valve, each plunger hydraulic is intracavitary to be also housed within plunger spring, and plunger, each plunger at one end holds out against dynamic rail, the other end holds out against the bottom of plunger hydraulic chamber by plunger spring, the bottom of plunger hydraulic chamber is far from dynamic rail.The utility model is by being arranged multiple plunger hydraulic chambers, so as to suitably reduce the spring force of single spring in timing stretcher, reduces total friction head when catenary system work.
Description
Technical field
The utility model relates to engine correlative technology field, especially a kind of engine timing chain drive system.
Background technique
Engine timing transmission system is used to connect engine crankshaft and engine cam, it is generally the case that engine
The crankshaft of lower section drives timing chain or Timing Belt by front end crankshaft sprocket, drives the camshaft sprocket above engine,
And then drive shaft rotation.Valve is set to pump by camshaft actuated rocker arm tappet mechanism again.Meanwhile engine is just
When transmission system so that crank angle moment and camshaft degree moment is kept stable relative phase relation, realize valve correct
At the time of be opened and closed.
Currently, national legislation is increasingly harsh to carbon emission amount requirement.At the same time, comfort requirement of the client to automobile
More next, the NVH performance of engine becomes more important therewith.Further decrease the friction loss of engine, improve NVH performance with
Meet fuel economy and comfort demand has been the part paid close attention to emphatically in engine development process.
Traditional engine timing chain drive system is combined using spring piston with the hydraulic cavities with one-way valve structures
Stretcher provide tensile force for catenary system.The type system keeps enough tensile force dimensions in low engine speeds low oil pressure
It holds system to stablize, it usually needs spring force is arranged in 40N or more.And excessively high spring tension brings higher friction damage
It loses.And there are the possible higher problems of order noise for the design of all the time traditional silent chain.
Utility model content
Based on this, it is necessary to which the technical issues of being directed to the high friction loss of the prior art and high noisy provides a kind of engine
Timing chain drive system.
The utility model provides a kind of engine timing chain drive system, comprising: intake-side camshaft sprocket wheel, exhaust side are convex
Wheel shaft sprocket wheel, crankshaft sprocket are wound around the intake-side camshaft sprocket wheel, the exhaust side camshaft sprocket wheel and the crankshaft chain
The dynamic rail of timing chain, the abutting timing chain on wheel and the timing stretcher for holding out against the dynamic rail, the timing
Tight device includes stretcher shell, and the stretcher shell is equipped with multiple for accommodating the plunger hydraulic chamber of liquid, and each institute
The bottom for stating plunger hydraulic chamber is provided with a check valve, and each plunger hydraulic is intracavitary to be also housed within plunger spring and plunger,
Each plunger at one end holds out against the dynamic rail, and the other end holds out against the bottom of the plunger hydraulic chamber by the plunger spring,
The bottom of the plunger hydraulic chamber is far from the dynamic rail.
Further, the plunger hydraulic chamber includes main plunger hydraulic cavities and second level plunger hydraulic cavities, the plunger spring
Including the main plunger spring being placed in the main plunger hydraulic cavities and the two stage column being placed in the second level plunger hydraulic cavities
Spring is filled in, the plunger includes the main plunger being placed in the main plunger hydraulic cavities and is placed in the second level plunger hydraulic cavities
Interior second level plunger.
Further, the end that the main plunger holds out against the dynamic rail is additionally provided with main plunger clip.
Further, the dynamic rail includes: dynamic rail bracket, the dynamic rail spring retention that dynamic rail bracket side is arranged in
Chamber and the dynamic rail rubbing surface that the dynamic rail bracket other side is arranged in are equipped with dynamic rail bullet in the dynamic rail spring retention chamber
Spring cap and dynamic rail spring, dynamic rail spring compressor one end pass through dynamic rail spring retention chamber described in the dynamic rail spring top clamping
Bottom, the other end are connect with the second level plunger, and the main plunger holds out against the dynamic rail bracket far from the dynamic rail rubbing surface
Side.
Further, the diameter of the second level plunger hydraulic cavities is less than the diameter of the main plunger hydraulic cavities.
Further, the rigidity of the dynamic rail spring is greater than the main plunger spring, and the rigidity of the dynamic rail spring
Greater than the second level plunger spring.
Further, the cavity wall of the second level plunger hydraulic cavities is provided with release pin aperture.
Further, plunger oil-control disk is additionally provided in each plunger.
Further, the crankshaft sprocket includes multiple preceding toothrows for engaging with the timing chain, multiple described
The pitch radius of preceding toothrow is different.
Further, the pitch radius of multiple preceding toothrows successively changes from small to large.
The utility model is by being arranged multiple plunger hydraulic chambers, so as to suitably reduce single spring in timing stretcher
Spring force, reduce catenary system work when total friction head.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of engine timing chain drive system of the utility model；
Fig. 2 is the structural schematic diagram of timing stretcher；
Fig. 3 is dynamic rail structural schematic diagram；
Fig. 4 is crankshaft sprocket structural schematic diagram.
Specific embodiment
The utility model is described in more detail in the following with reference to the drawings and specific embodiments.
It is as shown in Figure 1 a kind of structural schematic diagram of engine timing chain drive system of the utility model, comprising: air inlet side
Camshaft sprocket 1, crankshaft sprocket 3, is wound around the intake-side camshaft sprocket wheel 1, the exhaust at exhaust side camshaft sprocket wheel 2
It timing chain 4 on side camshaft sprocket 2 and the crankshaft sprocket 3, the dynamic rail 5 for being close to the timing chain 4 and holds out against
The timing stretcher 6 of the dynamic rail 5, as shown in Fig. 2, the timing stretcher 6 includes stretcher shell 61, the stretcher shell
Body 61 is equipped with multiple plunger hydraulic chambers 62,63 for being used to accommodate liquid, and the bottom of each plunger hydraulic chamber 62,63 is set
It is equipped with a check valve, is also housed within plunger spring 64,65 and plunger 66,67 in each plunger hydraulic chamber 62,63, each
The plunger 66,67 one end hold out against the dynamic rail 5, and the other end holds out against the plunger hydraulic chamber by the plunger spring 64,65
62,63 bottom, the bottom of the plunger hydraulic chamber 62,63 is far from the dynamic rail 5.
Specifically, after engine start, in crankshaft torsional vibrations, the function influence of the fluctuation of speed and camshaft phase adjusting
Under, catenary system is constantly in dynamic regulation state, and dynamic rail 5 can swing around upper support axis.The effect of timing stretcher is
It swings in dynamic rail 5 and maintains suitable tensile force in Dynamic Regulating Process, system overrelaxation should be avoided to cause clatter clatter different
Ring even jump tooth, also to avoid tensile force it is excessively high cause catenary system utter long and high-pitched sounds abnormal sound and with high frictional work lose.Timing stretcher
High pressure oil is injected in plunger hydraulic chamber 62,63, then plunger 66,67 is in the hydraulic coupling of internal high-voltage oil cavity and the bullet of plunger spring
Under spring force collective effect, dynamic rail 5 is withstood, plays the role of being tensioned timing chain 4, maintains entire catenary system steady operation.
Fig. 2 is the structural schematic diagram of timing stretcher, when dynamic rail 5 is swung to the right, work of the plunger 66,67 in spring force
With lower stretching, system is made to maintain tensioning.Pressure when dynamic rail 5 is swung to the left in plunger hydraulic chamber 62,63 increases rapidly, plunger
66,67 dynamic rail is withstood under the collective effect of spring force and hydraulic coupling, system is maintained to stablize.Compared to conventional tensioners only one
The case where plunger, the timing stretcher of the utility model have multiple piston structures.It can be more fast when needing to provide hydraulic coupling
Run-up founds oil pressure and provides higher hydraulic coupling, therefore can suitably reduce the spring force of the plunger spring of timing stretcher, thus
Reduce total friction head when catenary system work.
The utility model is by being arranged multiple plunger hydraulic chambers, so as to suitably reduce single spring in timing stretcher
Spring force, reduce catenary system work when total friction head.
The plunger hydraulic chamber includes main plunger hydraulic cavities 62 and second level plunger hydraulic cavities in one of the embodiments,
63, the plunger spring includes the main plunger spring 64 being placed in the main plunger hydraulic cavities 62 and is placed in the two stage column
The second level plunger spring 65 in hydraulic cavities 63 is filled in, the plunger includes the main plunger 66 being placed in the main plunger hydraulic cavities 62
With the second level plunger 67 being placed in the second level plunger hydraulic cavities 63.
Two plunger hydraulic chambers are arranged in the present embodiment, so as to suitably reduce the spring of single spring in timing stretcher
Power reduces total friction head when catenary system work.
The end that the main plunger 64 holds out against the dynamic rail 5 in one of the embodiments, is additionally provided with main plunger clip 68.
The dynamic rail 5 includes: dynamic rail bracket 51, is arranged in 51 side of dynamic rail bracket in one of the embodiments,
Dynamic rail spring retention chamber 52 and the dynamic rail rubbing surface 53 of 5 other side of dynamic rail bracket is set, the dynamic rail spring holds
It sets and is equipped with dynamic rail spring compressor 54 and dynamic rail spring 55 in chamber 52, described 54 one end of dynamic rail spring compressor passes through the dynamic rail bullet
Spring 55 holds out against the bottom of the dynamic rail spring retention chamber 52, and the other end is connect with the second level plunger 67, and the main plunger 66 pushes up
Tight side of the dynamic rail bracket 51 far from the dynamic rail rubbing surface 52.
It is illustrated in figure 3 dynamic rail structural schematic diagram, wherein dynamic rail spring 55 passes through dynamic rail spring compressor 54 and timing stretcher
Second level plunger 67 be engaged.When engine oil pressure is higher at high speed for engine, second level plunger 67 can compress dynamic rail height
Rigid spring guarantees that system tight power will not be increased excessively, improves the dynamic stability of catenary system, while can also avoid producing
The raw problem excessive with friction loss of uttering long and high-pitched sounds.
The diameter of the second level plunger hydraulic cavities 63 is less than the main plunger hydraulic cavities 62 in one of the embodiments,
Diameter.
The second level plunger hydraulic cavities diameter of the present embodiment is smaller, and leakage rate is lower, can be with when needing to provide hydraulic coupling
Oil pressure is established more rapidly, and higher hydraulic coupling is provided.
Specifically, match since dynamic rail spring 55 is contacted by dynamic rail spring compressor 54 with the second level plunger 67 of timing stretcher
It closes, therefore, when engine oil pressure is higher at high speed for engine, second level plunger is since inner hydraulic chamber diameter is small, leakage rate
Low to cause to have little time draining, so that the continuous rigid elongate of second level plunger, second level plunger can compress dynamic rail high rigidity spring at this time, protect
Card system tight power will not be increased excessively, improve the dynamic stability of catenary system, while can also be avoided generating and be uttered long and high-pitched sounds and rub
It wears and loses excessive problem.
The rigidity of the dynamic rail spring 55 is greater than the main plunger spring 64 in one of the embodiments, and described dynamic
The rigidity of rail spring 55 is greater than the second level plunger spring 65.
The plunger spring rigidity of the present embodiment is lower, avoids higher friction loss.
The cavity wall of the second level plunger hydraulic cavities 63 is provided with release pin aperture 69 in one of the embodiments,.
Specifically, it is assembled in assembly using the help of stretcher release pin 610, when catenary system is after the assembly is completed from release
It sells and extracts stretcher release pin 7 in aperture 69, to discharge stretcher.
Plunger oil-control disk is additionally provided in each plunger 66,67 in one of the embodiments,.
As shown in figure 4, the crankshaft sprocket 3 includes multiple is used for and the timing chain 4 in one of the embodiments,
The pitch radius of the preceding toothrow 31 of engagement, multiple preceding toothrows 31 is different.
Crankshaft sprocket is as shown in figure 4, crankshaft sprocket 3 is preferably powder metallurgy sintered forming, and two toothrow of band, the number of teeth is 25
Tooth.Preceding toothrow 31 is engaged with timing chain 4, and rear toothrow 32 is engaged with oil pump chain 7.
The tooth form of toothrow 32 and oil pump sprocket engagement determines pitch radius for traditional afterwards, and before being engaged with timing chain 4
Toothrow 31 then uses radius of circle of switching political loyalty, which can offset the crankshaft torsional vibrations of particular order and cam axial torsional vibration, reduction are made an uproar
Sound is horizontal.
The pitch radius of multiple preceding toothrows successively changes from small to large in one of the embodiments,.
As the best embodiment of the utility model, a kind of structural schematic diagram of engine timing chain drive system, comprising: into
Gas side camshaft sprocket 1, crankshaft sprocket 3, is wound around the intake-side camshaft sprocket wheel 1, is described exhaust side camshaft sprocket wheel 2
The dynamic rail 5 of timing chain 4, the abutting timing chain 4 on exhaust side camshaft sprocket wheel 2 and the crankshaft sprocket 3 holds out against institute
Timing stretcher 6, the oil pump chain 7 of dynamic rail 5 are stated, oil pump sprocket wheel 8, oil pump stretcher 9, orbit determination 10 and upper rail 11 are such as schemed
Shown in 2, the timing stretcher 6 includes stretcher shell 61, and the stretcher shell 61 is equipped with 62 He of main plunger hydraulic cavities
Second level plunger hydraulic cavities 63, and the bottom of main plunger hydraulic cavities 62 and second level plunger hydraulic cavities 63 is provided with a check valve, it is main
62 content of plunger hydraulic chamber sets low the main plunger spring 64 and main plunger 66 of rigidity, and 63 content of second level plunger hydraulic cavities is set low just
The second level plunger spring 65 and second level plunger 67 of degree, the end that the main plunger 64 holds out against the dynamic rail 5 are additionally provided with principal post fork clip
Hoop 68, the cavity wall of the second level plunger hydraulic cavities 63 is provided with release pin aperture 69, the diameter of the second level plunger hydraulic cavities 63
Less than the diameter of the main plunger hydraulic cavities 62.
As shown in figure 3, the dynamic rail 5 includes: dynamic rail bracket 51, the dynamic rail bullet that 51 side of dynamic rail bracket is arranged in
Spring accommodating cavity 52 and the dynamic rail rubbing surface 53 that 5 other side of dynamic rail bracket is set, in the dynamic rail spring retention chamber 52
It is equipped with the dynamic rail spring 55 of dynamic rail spring compressor 54 and high rigidity, described 54 one end of dynamic rail spring compressor passes through the dynamic rail bullet
Spring 55 holds out against the bottom of the dynamic rail spring retention chamber 52, and the other end is connect with the second level plunger 67, and the main plunger 66 pushes up
Tight side of the dynamic rail bracket 51 far from the dynamic rail rubbing surface 52.
As shown in figure 4, crankshaft sprocket 3 is preferably powder metallurgy sintered forming, two toothrow of band, the number of teeth is 25 teeth.It is front-seat
Tooth 31 is engaged with timing chain 4, and rear toothrow 32 is engaged with oil pump chain 7.
The tooth form of toothrow 32 and oil pump sprocket engagement determines pitch radius for traditional afterwards, and preceding toothrow is nibbled with timing chain 4
The gear of conjunction then uses traitorous radius of circle, which can offset the crankshaft torsional vibrations and cam axial torsional vibration of particular order, reduces
Noise level.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of engine timing chain drive system characterized by comprising intake-side camshaft sprocket wheel, exhaust side camshaft
Sprocket wheel, crankshaft sprocket are wound around on the intake-side camshaft sprocket wheel, the exhaust side camshaft sprocket wheel and the crankshaft sprocket
Timing chain, be close to the dynamic rail of the timing chain and hold out against the timing stretcher of the dynamic rail, the timing stretcher
Including stretcher shell, the stretcher shell is equipped with multiple for accommodating the plunger hydraulic chamber of liquid, and each column
The bottom of plug hydraulic cavities is provided with a check valve, and each plunger hydraulic is intracavitary to be also housed within plunger spring and plunger, each
The plunger at one end holds out against the dynamic rail, and the other end holds out against the bottom of the plunger hydraulic chamber by the plunger spring, described
The bottom of plunger hydraulic chamber is far from the dynamic rail.
2. engine timing chain drive system according to claim 1, which is characterized in that the plunger hydraulic chamber includes master
Plunger hydraulic chamber and second level plunger hydraulic cavities, the plunger spring include the main plunger bullet being placed in the main plunger hydraulic cavities
Spring and the second level plunger spring being placed in the second level plunger hydraulic cavities, the plunger are hydraulic including being placed in the main plunger
Intracavitary main plunger and the second level plunger being placed in the second level plunger hydraulic cavities.
3. engine timing chain drive system according to claim 2, which is characterized in that the main plunger holds out against described dynamic
The end of rail is additionally provided with main plunger clip.
4. engine timing chain drive system according to claim 2, which is characterized in that the dynamic rail includes: dynamic rail branch
Frame, the dynamic rail spring retention chamber that dynamic rail bracket side is set and the dynamic rail that the dynamic rail bracket other side is set
Rubbing surface, dynamic rail spring compressor and dynamic rail spring are equipped in the dynamic rail spring retention chamber, and dynamic rail spring compressor one end is logical
The bottom of dynamic rail spring retention chamber described in the dynamic rail spring top clamping is crossed, the other end is connect with the second level plunger, the principal post
Plug holds out against side of the dynamic rail bracket far from the dynamic rail rubbing surface.
5. engine timing chain drive system according to claim 4, which is characterized in that the second level plunger hydraulic cavities
Diameter is less than the diameter of the main plunger hydraulic cavities.
6. engine timing chain drive system according to claim 4, which is characterized in that the rigidity of the dynamic rail spring is big
In the main plunger spring, and the rigidity of the dynamic rail spring is greater than the second level plunger spring.
7. engine timing chain drive system according to claim 2, which is characterized in that the second level plunger hydraulic cavities
Cavity wall is provided with release pin aperture.
8. described in any item engine timing chain drive systems according to claim 1~7, which is characterized in that each column
Plunger oil-control disk is additionally provided in plug.
9. engine timing chain drive system according to claim 1, which is characterized in that the crankshaft sprocket includes multiple
The pitch radius of preceding toothrow for engaging with the timing chain, multiple preceding toothrows is different.
10. engine timing chain drive system according to claim 9, which is characterized in that the section of multiple preceding toothrows
Radius of circle successively changes from small to large.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920010307.8U CN209483450U (en) | 2019-01-04 | 2019-01-04 | A kind of engine timing chain drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920010307.8U CN209483450U (en) | 2019-01-04 | 2019-01-04 | A kind of engine timing chain drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209483450U true CN209483450U (en) | 2019-10-11 |
Family
ID=68130036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920010307.8U Active CN209483450U (en) | 2019-01-04 | 2019-01-04 | A kind of engine timing chain drive system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209483450U (en) |
-
2019
- 2019-01-04 CN CN201920010307.8U patent/CN209483450U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107013638B (en) | Chain stretching device | |
| CN107061644B (en) | Chain stretching device | |
| AU2006200386B2 (en) | Engine decompression system | |
| JP2015203428A (en) | chain tensioner | |
| CN209483450U (en) | A kind of engine timing chain drive system | |
| CN201992014U (en) | Chain transmission mechanism of oil pump | |
| US9797321B2 (en) | Internal combustion engine with elevated compression ratio and multi-stage boosting including a variable-speed supercharger | |
| CN108713116A (en) | The accessory drive system of engine | |
| JP2003519314A (en) | Internal combustion engine with valve control | |
| CN204186901U (en) | A kind of motor tooth bar non-return stretcher | |
| CN204628455U (en) | A kind of high performance hydraulic of adjustment automatically stretcher | |
| JPS59203863A (en) | Fuel injection pump for fuel injection type internal- combustion engine | |
| JP3602706B2 (en) | Chain tensioner | |
| FR2600719A1 (en) | SELF-MODULATING COMBUSTION CHAMBER AND METHOD OF REDUCING THE VOLUME OF RESIDUAL GASES FROM AN ENGINE | |
| WO2016145570A1 (en) | Elevated compression ratio internal combustion enginewith multi-stage boosting | |
| CN203022837U (en) | Timing driving system of engine and engine | |
| CN209179833U (en) | A kind of light duty engine cam shaft gear drive mechanism | |
| CN111895053A (en) | Hydraulic tensioner with pressure relief function | |
| KR101439035B1 (en) | Apparatus for variable valve actuation for vehicle | |
| JPH11101318A (en) | Chain tensioner | |
| CN203008981U (en) | Chain tensioner | |
| CN217519175U (en) | Novel damping and noise reducing device | |
| JP2002333056A (en) | Chain tensioner | |
| CN108644328A (en) | Timing tensioning apparatus and engine | |
| CN212536553U (en) | High security tensioning ware |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |