CN102828793A - Intermediate lever - Google Patents
Intermediate lever Download PDFInfo
- Publication number
- CN102828793A CN102828793A CN2012102016433A CN201210201643A CN102828793A CN 102828793 A CN102828793 A CN 102828793A CN 2012102016433 A CN2012102016433 A CN 2012102016433A CN 201210201643 A CN201210201643 A CN 201210201643A CN 102828793 A CN102828793 A CN 102828793A
- Authority
- CN
- China
- Prior art keywords
- crossbeam
- lever
- sidewall
- upper side
- axle
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
- B21K1/205—Making machine elements valve parts rocker arms
-
- 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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
- F01L13/0026—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio by means of an eccentric
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
- F01L2305/02—Mounting of rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention relates to an intermediate lever (1) for a variable valve drive mechanism of an internal combustion engine. The intermediate lever comprises two side walls (2) which are bridged in a central section by an axle (3) on which a counter-rotating roller (4) for a lifting cam is arranged enclosed by the side walls (2). A surface 6 for variably transmitting a lift of the lifting cam to a pick-up element of a cam follower is located at one end (5), and the side walls (2) are spanned at a further end (7) by a further axle (8) on which a roller packet (9) for contacting a gate track and an eccentric disc is mounted. The side walls (2) are bridged by a transverse yoke (10) which is in the form of a separate component.
Description
Technical field
Invention relates to the middle lever of the variable valve actuator for air that is used for internal-combustion engine, and this centre lever has two sidewalls, these two sidewalls in centre portion by the axle bridge joint; On this, be furnished with the counter-rotating roller that centers on by sidewall, be used for eccentric disc, wherein, be located at end place be used for the journey variable of eccentric disc be delivered to the face on the point of branching of servo-actuated link; Wherein, At the other end place, sidewall is by another tensioning, uses on this another to be used for the set of rollers that the contact of chute path contacts with disc cams; And wherein, sidewall is by the crossbeam bridge joint.
Background technique
Example to lever in the middle of this (being processed by steel plate at this) can be known by the Fig. 3 in the accompanying drawing, and application time of the present invention relatively point is called in the complete variable valve actuator for air in " Valvetronic Generation 3 (3 generations of VVT) " and makes up at their internalname that has by Bayerischen Motorenwerken (Bavaria engine works).
The stabilization that is used for middle lever securely with the crossbeam that sidewall is connected in other end under the situation of the middle lever of mentioning in front.In addition, this crossbeam causes as follows, that is, between the erecting stage of the axle that has counter-rotating roller and set of rollers, sidewall is remained in the predetermined location, and in heat treatment, also have the dimensionally stable that in the cutting of middle lever, keeps middle lever in case of necessity.
Be considered to disadvantageously be, this crossbeam boundary the degrees of freedom of middle lever, and in variable fully valve mechanism constitutes, limited freedom thus.In addition, lever is still too complicated in the middle of this crossbeam moulding.
Summary of the invention
Task of the present invention is that design does not have the middle lever of above-mentioned shortcoming.Especially, this centre lever should have the degrees of freedom of having improved in simple structure, and can not have a harmful effect ground processing assembling in other words.
Solve through following mode according to this task of the present invention, that is, crossbeam is as independently member existence.
Solved above-mentioned shortcoming thus.Middle lever has the degrees of freedom of having improved; Especially on chute direction and cam direction and can be through cancelling crossbeam that single-piece ground up to now is connected ground processing on punching press-bending techniques more simply; Wherein, certainly also be provided with production on the forming technique of this crossbeam.
That also allow this crossbeam is arranged in up to now difficulty only as the connection of the crossbeam of independent component or (as between counter-rotating roller and the set of rollers) place, location that can not realize, in the zone of the upper side of middle lever.The crossbeam preferred orientation is in the zone of an obvious and end part interval of middle lever.
According to favourable design proposal of the present invention, crossbeam can be connected with sidewall securely.Consider for example melting welding, soldering, engaging, interlock, clamping, pressing, bonding or bolt connection at this.
Alternatively, also be provided with the deformation program of being set up as follows, in this deformation program, crossbeam removably is connected with sidewall.At least in this design proposal, advise; Follow closely in the middle of producing and after the lever crossbeam is connected with sidewall with punching press-bending techniques; And with middle lever jointly through heat-treated, wherein, next also carry out cutting and to have roller/set of rollers the axle assembling.Because bar has obtained enough stability through a plurality of in the case now, so before middle lever being fitted in the valve mechanism, remove crossbeam again.But alternatively, this dismountable crossbeam also can be retained on the middle lever.
In improvement project of the present invention, above-mentioned relatively dismountable deformation program is provided with as follows, that is, crossbeam is provided with the aduncate flange that is claw-like in tip side, and these flanges are for fastening and snap in/nip in the dimple separately of sidewall.This connection can be born further stabilization/anti-loss through following mode, that is, for example this crossbeam has the dimple that is flute profile at its downside, and these dimples that are flute profile are pegged graft on the upper side of sidewall perhaps conversely.
Particularly advantageous is that middle lever is formed by thin-walled steel plate deep-draw punching press/bending in other words.But also can die-casting technique ground or the cutting ground manufacturing basically in other words of extrusion technique ground.Abandon transverse beam (this transverse beam will give in the middle of lever with the profile that takes the shape of the letter U in cross section) aptly, this is favourable aspect lightweight structure for example.
The alternative design variations scheme that is used for crossbeam is, as according to requiring the suggestion ground, this crossbeam is configured to crosspiece (Sprosse) or pipe fitting and can be distributed in the dimple separately of sidewall.Can consider above-mentioned security measure equally at this.
By small modification, this centre lever also can have its main design characteristics ground as the cam following bar in " classics " valve mechanism.
Description of drawings
By explained the present invention.Wherein:
Fig. 1 illustrates first deformation program of the middle lever that has dismountable crossbeam;
Fig. 2 illustrates second deformation program of the middle lever that has the crossbeam that is connected with sidewall securely; With
Fig. 3 shows the middle lever (referring to " background technique ") according to existing technology.
Embodiment
Fig. 1 discloses a kind of middle lever 1 that is used for the variable valve actuator for air of internal-combustion engine.This centre lever has two straight sidewalls 2, and these two straight sidewalls by axle 3 bridge joints, are furnished with the counter-rotating roller 4 that is used for eccentric disc on axle 3 in centre portion.
In order changeably the stroke of eccentric disc to be delivered on the point of branching of the servo-actuated link that exists as draw-bar, face 6 is distributed in first end 5 places.7 places in the other end, sidewall 2 is by another axle 8 tensionings, on this, uses to be used for the set of rollers 9 that chute path contact contacts with disc cam.
In Fig. 1, find out, the sidewall 2 of middle lever 1 above that 12 places, side by independently, at these dismountable crossbeam 10 bridge joints.This crossbeam overlap joint longitudinally is distributed in the portion of leaving a blank 11 between counter-rotating roller 4 and the set of rollers 9.In the zone of end end face 14, this crossbeam 10 has the flange 15 that is the inside sensing of claw-like.This flange is rabbeted in the groove separately 16 of the outer side surface 17 of sidewall 2 into, and this groove 16 also can run through.
Above-mentioned crossbeam 10 has two dimples 18 that are flute profile at its downside place, via these two dimples, in the middle of crossbeam is plugged on the upper side 12 of sidewall 2 of lever 1.
According to the crossbeam 10 of Fig. 2 securely, just be connected at upper side 12 places with the inner side surface 13 of sidewall 2 near these sidewalls on-dismountablely.This crossbeam is distributed in the vertical section between counter-rotating roller 4 and the set of rollers 9 equally.
Fig. 3 discloses a kind of middle lever 19 according to existing technology, has internalname by Bayerischen Motorenwerken (Bavaria engine works) at it and is called the middle lever that makes up in the complete variable valve actuator for air of " Valvetronic Generation 3 " as current.Crossbeam 20 bridge joints that the sidewall 21 of this centre lever is connected by single-piece ground in the zone of set of rollers are not difficult to find out, the degrees of freedom of lever 19 in the middle of the crossbeam restriction that this single-piece ground connects.
Reference numerals list
Lever in the middle of 1
2 sidewalls
3
4 counter-rotating rollers
5 ends
6
7 the other end
8
9 set of rollers
10 crossbeams
11 portions of leaving a blank
12 upper sides
13 inner side surfaces
14 end end faces
15 flanges
16 grooves
17 outer side surfaces
18 dimples
Lever (existing technology) in the middle of 19
20 crossbeams (existing technology)
21 sidewalls (existing technology)
Claims (10)
1. the middle lever (1) that is used for the variable valve actuator for air of internal-combustion engine; This centre lever has two sidewalls (2); These two sidewalls by axle (3) bridge joint, are furnished with the counter-rotating roller (4) that is used for eccentric disc that is centered on by said sidewall (2) on said axle in centre portion; Wherein, locate be located in an end (5) be used for the journey variable of said eccentric disc be delivered to the face (6) on the point of branching of servo-actuated link; Wherein, (7) are located in the other end, and said sidewall (2) is by another axle (8) tensioning, use on this another to be used for the set of rollers (9) that the contact of chute path contacts with disc cams; And wherein, said sidewall (2) is characterized in that by crossbeam (10) bridge joint said crossbeam (10) is as independently member existence.
2. lever in the middle of according to claim 1 is characterized in that, the portion of leaving a blank (11) between said counter-rotating roller (4) and said set of rollers (9) of lever (1) in the middle of said crossbeam (10) overlap joint is said.
3. lever in the middle of according to claim 1 and 2; It is characterized in that; Between the inner side surface (13) of said sidewall (2); Said crossbeam (10) is seated in the zone of upper side (12) or near upper side (12), said upper side (12) faces the road, in-run of said eccentric disc.
4. lever in the middle of according to claim 1 is characterized in that said crossbeam (10) is dismountable.
5. according to claim 1 or 4 described middle levers; It is characterized in that; The upper side (12) of the said sidewall of said crossbeam (10) tensioning (2); And in the zone of the end of said crossbeam end face (14), have and be claw-like ground inwardly or the flange (15) that outwards points to, this flange embeds in the groove separately (16) of outer side surface or inner side surface (17,13) of said sidewall (2).
6. lever in the middle of according to claim 5; It is characterized in that; Intrinsic two dimples (18) that are flute profile of said crossbeam (10), said crossbeam via this dimple be plugged on said in the middle of on the upper side (12) of said sidewall (2) of lever (1); Said upper side (12) has two dimples that are flute profile, and said crossbeam (10) is seated in this dimple.
7. lever in the middle of according to claim 1 is characterized in that, said crossbeam (10) and said sidewall (2) are through being connected like melting welding, soldering, engaging, interlock, clamping, pressing, bonding or bolted method.
8. lever in the middle of according to claim 1 is characterized in that, said in the middle of lever (1) process by the thin-walled steel plate, and all be no transverse beam up to said crossbeam (10).
9. according to the said middle lever of claim 1, it is characterized in that said crossbeam (10) is formed into crosspiece, and is seated in the hole of said sidewall (2) in tip side.
10. be used to make method according to the middle lever of claim 4; It is characterized in that; Assembling said crossbeam (10) afterwards with lever (1) in the middle of punching press-bending techniques production is said, then carry out the heat treatment and the cutting of construction package (1,10), assembling subsequently has the said axle (3,8) of counter-rotating roller (4) and set of rollers (9); And wherein, next dismantle said crossbeam (10) again.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011077527.7 | 2011-06-15 | ||
| DE102011077527A DE102011077527A1 (en) | 2011-06-15 | 2011-06-15 | intermediate lever |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102828793A true CN102828793A (en) | 2012-12-19 |
| CN102828793B CN102828793B (en) | 2016-11-30 |
Family
ID=
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437850A (en) * | 2013-08-14 | 2013-12-11 | 重庆长安汽车股份有限公司 | Continuously variable valve lift mechanism |
| CN110894798A (en) * | 2018-09-13 | 2020-03-20 | 舍弗勒技术股份两合公司 | Actuating device for a variable valve train and method for producing an actuating unit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207191A (en) * | 1992-08-31 | 1993-05-04 | Henley Manufacturing Holding Company, Inc. | Boat-type rocker arm with stiffening member |
| JP2000230406A (en) * | 1999-02-09 | 2000-08-22 | Skf France | Rocker arm |
| US20050241601A1 (en) * | 2002-12-21 | 2005-11-03 | Wolfgang Christgen | Intermediate lever for a variable valve train of an internal combustion engine |
| CN101059088A (en) * | 2006-04-21 | 2007-10-24 | 谢夫勒两合公司 | Rocking bar used for variable air valve mechanism |
| WO2008052874A1 (en) * | 2006-10-31 | 2008-05-08 | Schaeffler Kg | Valve train lever for a combustion engine |
| CN101180454A (en) * | 2005-05-20 | 2008-05-14 | 谢夫勒两合公司 | Drag lever of a valve timing mechanism of an internal combustion engine |
| CN101268254A (en) * | 2005-09-30 | 2008-09-17 | 谢夫勒两合公司 | Asymmetrical rocker arm for a valve gear of an internal combustion engine |
| CN101403326A (en) * | 2008-06-16 | 2009-04-08 | 奇瑞汽车股份有限公司 | Variable air valve lift range mechanism of internal combustion engine |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207191A (en) * | 1992-08-31 | 1993-05-04 | Henley Manufacturing Holding Company, Inc. | Boat-type rocker arm with stiffening member |
| JP2000230406A (en) * | 1999-02-09 | 2000-08-22 | Skf France | Rocker arm |
| US20050241601A1 (en) * | 2002-12-21 | 2005-11-03 | Wolfgang Christgen | Intermediate lever for a variable valve train of an internal combustion engine |
| CN101180454A (en) * | 2005-05-20 | 2008-05-14 | 谢夫勒两合公司 | Drag lever of a valve timing mechanism of an internal combustion engine |
| CN101268254A (en) * | 2005-09-30 | 2008-09-17 | 谢夫勒两合公司 | Asymmetrical rocker arm for a valve gear of an internal combustion engine |
| CN101059088A (en) * | 2006-04-21 | 2007-10-24 | 谢夫勒两合公司 | Rocking bar used for variable air valve mechanism |
| WO2008052874A1 (en) * | 2006-10-31 | 2008-05-08 | Schaeffler Kg | Valve train lever for a combustion engine |
| CN101403326A (en) * | 2008-06-16 | 2009-04-08 | 奇瑞汽车股份有限公司 | Variable air valve lift range mechanism of internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437850A (en) * | 2013-08-14 | 2013-12-11 | 重庆长安汽车股份有限公司 | Continuously variable valve lift mechanism |
| CN103437850B (en) * | 2013-08-14 | 2015-06-03 | 重庆长安汽车股份有限公司 | Continuously variable valve lift mechanism |
| CN110894798A (en) * | 2018-09-13 | 2020-03-20 | 舍弗勒技术股份两合公司 | Actuating device for a variable valve train and method for producing an actuating unit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2491939A (en) | 2012-12-19 |
| AT511682A3 (en) | 2014-01-15 |
| DE102011077527A1 (en) | 2012-12-20 |
| GB201208815D0 (en) | 2012-07-04 |
| AT511682B1 (en) | 2014-04-15 |
| AT511682A2 (en) | 2013-01-15 |
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Granted publication date: 20161130 Termination date: 20200615 |
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