CN102606247A - Oscillating lever in a valve train of an internal-combustion engine - Google Patents
Oscillating lever in a valve train of an internal-combustion engine Download PDFInfo
- Publication number
- CN102606247A CN102606247A CN2012100176194A CN201210017619A CN102606247A CN 102606247 A CN102606247 A CN 102606247A CN 2012100176194 A CN2012100176194 A CN 2012100176194A CN 201210017619 A CN201210017619 A CN 201210017619A CN 102606247 A CN102606247 A CN 102606247A
- Authority
- CN
- China
- Prior art keywords
- rocking arm
- type
- arm
- furnished
- support holes
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
-
- 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
- F01L13/0005—Deactivating valves
-
- 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
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
-
- 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
Abstract
A rocker or swing arm in a valve train of an internal combustion engine has a bearing bore(27) pivotally supporting the arm on a hollow axis located in a fixed position in the engine. The valve train has a camshaft with cams for causing the arm (26)to pivot. A hydraulic valve lash compensation element that acts on the tappet of a gas exchange valve connects to the arm(26). A supply line is arranged in the arm, and a radial opening connecting the hollow interior space of the axis to the supply line is arranged in the axis in the region of the arm(26) to deliver hydraulic means through the hollow axis to the lash compensation element. According to the invention, a labyrinth seal (35) surrounding the hollow axis without contact is arranged on the arm at each axial end of the bearing bore(27). The bearing space of the arm (26)is laterally sealed by this means.
Description
Technical field
The present invention relates to moving seesaw-type or pendulum-type rocking arm in a kind of internal combustion valve mechanism, have support holes, said moving seesaw-type or pendulum-type rocking arm can be bearing on the hollow shaft that is fixedly placed in the internal-combustion engine via this support holes the pivot pendulum motion.
Background technique
The valve mechanism that has the moving seesaw-type rocking arm by open text DE-OS 198 44 202 known a kind of internal-combustion engines; The moving seesaw-type rocking arm acts on the push rod of air-exchanging valves with an end; And with the other end; Be connected with in the centre under the situation of valve clearance compensating element of hydraulic pressure, on the cam of camshaft, supported.At the zone line of moving seesaw-type rocking arm, the moving seesaw-type rocking arm has support holes, utilizes said support holes, and the moving seesaw-type rocking arm can be bearing on the axle that is fixedly arranged the pivot pendulum.This supporting is a kind of sliding bearing.Therefore, here, not with the rocking arm rolling bearing under the situation on the pitman arm shaft, the potentiality of reducing friction keep not adding utilization.
Open text DE-OS 197 41 078 illustrates beginning mentioned moving seesaw-type type, that be used for internal combustion valve mechanism or pendulum-type rocking arm, and valve mechanism has the valve clearance compensating element of hydraulic pressure.Here, the supporting of rocking arm on the stationary axle of machine neither be embodied as rolling bearing, but is embodied as sliding bearing, thereby the potentiality of reducing friction that can utilize rolling bearing to realize keep not adding utilization.
Summary of the invention
The objective of the invention is to, moving seesaw-type or pendulum-type rocking arm are laterally sealed on its support holes, and do not increase the friction that occurs in the running simultaneously.
According to the present invention, this purpose is able to solve through following mode,, on each axial end portion on the rocking arm, in support holes, is furnished with the labyrinth-type excluder that contactlessly centers on hollow shaft that is, thus, laterally seals the supporting space of rocking arm.Seal clearance through the length in the labyrinth structure reduces the leakage from rocking arm significantly.
Valve mechanism can have camshaft, and said camshaft has the cam of the pivot pendulum motion that is used to produce rocking arm; The valve clearance compensating element that has hydraulic pressure, said valve clearance compensating element is connected and acts on the push rod of air-exchanging valves with rocking arm; Wherein, for through hollow shaft to valve clearance compensating element delivery hydraulic pressure medium, in rocking arm, be furnished with feed conduit, and in the zone of rocking arm, in axle, be furnished with the radial opening that inner space and feed conduit with axle couple together.
When moving seesaw-type or pendulum-type rocking arm are equipped with the valve clearance compensating element of hydraulic pressure, must guarantee: to compensating element sap pressure supply medium the time, keep enough fluid pressures.This is essential; Exist enough oil pressure to be used for so that when using oil, keep, keep the oily supply pressure of the valve clearance compensating element of hydraulic pressure or the oil pressure that is used for spray lubrication (Spritzschmierung) enough high the seal clearance of lubricated necessary oil spout
through the length of labyrinth-type excluder as hydraulic medium.
Rocking arm can be provided with rolling bearing in its support holes, by said rolling bearing, rocking arm can be bearing on the hollow shaft pivot pendulum motion.Can reduce the valve friction through the rolling bearing on moving seesaw-type or the pendulum-type pitman arm shaft with measuring, for example reduce about 15% to 20%.
Alternatively, rocking arm can also be equipped with the moving seesaw-type rocking arm insertion element of machinery or the moving seesaw-type rocking arm screw-in element of machinery.
Rolling bearing at first two row formulas ground is implemented, and always guarantees thus: the moving seesaw-type rocking arm that the moving seesaw-type rocking arm that oil transits to hydraulic pressure from moving seesaw-type or pendulum-type pitman arm shaft inserts element or transits to machinery inserts element or screws in element.
Rolling bearing can be provided with the retainer of guiding rolling element, the intermediate arrangement of said retainer have at least one with spool radial opening transition opening that be connected, that be used for hydraulic medium.In addition, the enforcement of two row formulas through rolling bearing compensation support holes is about error of centralization moving seesaw-type or pendulum-type pitman arm shaft, that possibly occur (Fluchtungsfehler).
Utilize the present invention, what can realize is to use rolling bearing in order to support moving seesaw-type or pendulum-type rocking arm, and do not hinder the function or the mechanical moving seesaw-type rocking arm of the valve clearance compensating element of hydraulic pressure to insert element or screw in the lubricated of element.
Description of drawings
Embodiments of the invention are shown in the drawings, and as follows following, that is, compare with previous rocking arm known prior art, that be used for valve mechanism of basis, and it is set forth in detail.Wherein:
Fig. 1 illustrates the longitudinal section according to moving seesaw-type rocking arm of the present invention;
Fig. 2 illustrates the perspective view of moving seesaw-type rocking arm;
Fig. 3 illustrates the perspective view of the part that the moving seesaw-type rocking arm cuts open along the support holes axis;
Fig. 4 to Fig. 6 illustrates the local longitudinal section of the moving seesaw-type rocking arm that has the valve clearance compensating element of packing into and the local longitudinal section of pendulum-type rocking arm; And
Fig. 7 illustrates the diagram according to the contact area of the compensating element of existing technology and valve actuating push rod end;
Fig. 8 illustrates the longitudinal section that is contained in the valve mechanism in the internal-combustion engine that has the moving seesaw-type rocking arm according to existing technology.
Embodiment
At the rocking arm 1 that starts the type of mentioning shown in Fig. 4 to Fig. 7.Wherein, be the moving seesaw-type rocking arm at the rocking arm shown in Fig. 41, and be the pendulum-type rocking arm at the rocking arm 1 shown in Fig. 5 and Fig. 6.Each rocking arm 1 all has support holes 2, utilizes said support holes, and rocking arm centers on axle 3, thereby makes rocking arm supported with the mode of ability pivot pendulum motion.This supporting is embodied as sliding bearing.
Axle 3 has the feed conduit 6 that is used for hydraulic medium.In the zone of the end 4 of rocking arm 1, be furnished with the valve clearance compensating element 5 of hydraulic pressure.This valve clearance compensating element is on the end 10 of air-exchanging valves push rod 11 with its contact area 9.
First radial hole 7 is used for hydraulic medium is delivered to valve clearance compensating element 5 from the feed conduit 6s of axle 3.Second radial hole 8 is arranged in the axle 3, is used for spray lubrication contact area 9.Around rocking arm 1 in respectively, path 12 is used for hydraulic medium is sent to valve clearance compensating element 5, and path 13 is used for applying splash (Spritzbeaufschlagung) to contact area 9.
Be contained in the internal-combustion engine 15 at the valve mechanism shown in Fig. 8 14, have hydraulic valve gap compensating element 16, said valve clearance compensating element is configured to the columnar cam follower, and on an axial end portion, can be passed by the cam 17 of camshaft.On its another axial end portion, cam follower has abutment face 18, and the underpart 19 of push rod 20 abuts on the abutment face.Cam follower is delivered on the end regions of moving seesaw-type rocking arm 21 at the place, end via push rod 20 by the moving movement that cam 17 causes above that.
The moving seesaw-type rocking arm 21 regional internal support that has support holes 22 therebetween is on hollow shaft 23, thereby moving seesaw-type rocking arm 21 can be put around axle 23 pivots.Axle 23 is fixedly placed in the cylinder head of internal-combustion engine 15.Here, the supporting of moving seesaw-type rocking arm 21 also is embodied as sliding bearing.On its other end away from push rod 20, moving seesaw-type rocking arm 21 acts on the push rod 24 of air-exchanging valves.Hydraulic medium is directed in the valve clearance compensating element 16 with the feed conduit 25 that is arranged in the push rod 20 via the feed conduit that is arranged in the moving seesaw-type rocking arm 21 from the concentric holes of hollow shaft 23.
Be embodied as the moving seesaw-type rocking arm and have support holes 27 in the zone therebetween at the rocking arm 26 according to the present invention shown in Fig. 1 to Fig. 3.The valve clearance compensating element 28 of the hydraulic pressure of being inserted is on the end of rocking arm 26, and the other end is equipped with the rocking arm insertion element 29 of machinery.
For the mode with ability pivot pendulum is bearing in rocking arm 26 on the fixing hollow shaft, in support holes 27, insert the retainer 30 of the rolling bearing 31 that has the rolling element 32 that is configured to needle roller.In order to be delivered to valve clearance compensating element 28 from the hollow shaft that centers on by retainer 30, in rocking arm 26, be furnished with feed conduit 33 as the oil of hydraulic medium.Oil flows into the feed conduit from hollow shaft at least one transition opening 34 through its radial opening and retainer 30.
According to the present invention, the space of the support holes 27 of rocking arm 26 (rolling bearing 31 is in this support holes) utilizes labyrinth-type excluder 35 to seal respectively on two axial end portions.Labyrinth-type excluder is placed on the rocking arm 26 and contactlessly centers on hollow shaft.
Reference numerals list
1 rocking arm
2 support holes
3
The end of 4 rocking arms
5 valve clearance compensating elements
6 feed conduit
7 first radial holes
8 second radial holes
9 contact areas
The end of 10 push rods
11 push rods
12 paths
13 paths
14 valve mechanisms
15 internal-combustion engines
16 valve clearance compensating elements
17 cams
18 abutment face
19 underparts
20 push rods
21 moving seesaw-type rocking arms
22 support holes
23
24 push rods
25 feed conduit
26 rocking arms
27 support holes
28 valve clearance compensating elements
29 rocking arms insert element
30 retainers
31 rolling bearings
32 rolling elements
33 feed conduit
34 transition openings
35 labyrinth-type excluders
Claims (9)
1. moving seesaw-type in the internal combustion valve mechanism or pendulum-type rocking arm; Have support holes (27), said rocking arm can be bearing on the hollow shaft that is fixedly placed in the said machine via said support holes the pivot pendulum motion, it is characterized in that; On said rocking arm (26); On each axial end portion of said support holes (27), be furnished with the labyrinth-type excluder (35) that contactlessly centers on said hollow shaft, thus, laterally seal the supporting space of said rocking arm (26).
2. according to the said rocking arm of claim 1, it is characterized in that said valve mechanism has camshaft, said camshaft has the cam of the pivot pendulum motion that is used to produce said rocking arm (26); The valve clearance compensating element (28) that has hydraulic pressure; Said valve clearance compensating element and said rocking arm (26) are connected and act on the push rod of air-exchanging valves; Wherein, For through said hollow shaft to said valve clearance compensating element (28) delivery hydraulic pressure medium, in said rocking arm (26), be furnished with feed conduit (33), and in the zone of said rocking arm (26), in said axle, be furnished with the radial opening that inner space and said feed conduit (33) with said axle couple together.
3. according to the said rocking arm of claim 2, it is characterized in that said rocking arm has rolling bearing (31) in its support holes (27), by said rolling bearing, said rocking arm can be bearing on the said hollow shaft pivot pendulum motion.
4. according to the said rocking arm of claim 3, it is characterized in that said rolling bearing one row formula ground is implemented.
5. according to the said rocking arm of claim 3, it is characterized in that said rolling bearing (31) multiple row formula ground is implemented.
6. according to the said rocking arm of claim 5; It is characterized in that; The retainer that said rolling bearing (31) has a guiding rolling element (32) (30), two row formulas ground implements, and in the intermediate arrangement of said retainer at least one and said said radial opening transition opening that be connected, that be used for hydraulic medium (34) arranged.
7. according to the said rocking arm of claim 2, it is characterized in that said rocking arm is embodied as the moving seesaw-type rocking arm, in said moving seesaw-type rocking arm, be furnished with said valve clearance compensating element (28) on the end and in zone line, be furnished with said support holes (27).
8. according to the said rocking arm of claim 2, it is characterized in that said rocking arm is embodied as the pendulum-type rocking arm, in said pendulum-type rocking arm, on an end, be furnished with said valve clearance compensating element (28) and on another end, be furnished with said support holes.
9. according to the said rocking arm of claim 2, it is characterized in that on the end, the rocking arm of machinery inserts element (29) or rocking arm screw-in element is connected with said rocking arm (26).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011003023A DE102011003023A1 (en) | 2011-01-24 | 2011-01-24 | Tilting or rocking lever in a valve train of an internal combustion engine |
| DE102011003023.9 | 2011-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102606247A true CN102606247A (en) | 2012-07-25 |
Family
ID=46510681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100176194A Pending CN102606247A (en) | 2011-01-24 | 2012-01-19 | Oscillating lever in a valve train of an internal-combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20120186549A1 (en) |
| CN (1) | CN102606247A (en) |
| DE (1) | DE102011003023A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179038A (en) * | 2015-10-30 | 2015-12-23 | 绵阳富临精工机械股份有限公司 | Low-rotational-inertia valve rocker |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013207577A1 (en) * | 2013-04-25 | 2014-11-13 | Mahle International Gmbh | Arrangement with two camshafts |
| EP2947307A1 (en) * | 2014-05-23 | 2015-11-25 | Aktiebolaget SKF | Cam follower roller device with integrated sealing elements, notably for a fuel injection pump |
| DE102021100952A1 (en) | 2021-01-19 | 2022-07-21 | Schaeffler Technologies AG & Co. KG | Solid construction rocker arm for a valve train of a heavy-duty internal combustion engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741078A1 (en) * | 1997-09-18 | 1999-03-25 | Schaeffler Waelzlager Ohg | Turning or tilting lever for internal combustion engine valve drive |
| US6230676B1 (en) * | 1999-04-23 | 2001-05-15 | Toledo Technologies Inc. | Interchangeable rocker arm assembly |
| EP1338760A2 (en) * | 2002-02-26 | 2003-08-27 | Delphi Technologies, Inc. | Two-step roller finger cam follower having spool-shaped low-lift roller |
| US6786645B2 (en) * | 2001-11-21 | 2004-09-07 | The Timken Company | Mounting for vehicular road wheel |
| US20040202393A1 (en) * | 2002-05-22 | 2004-10-14 | Takashi Masui | Self-aligning bearing |
| CN101463737A (en) * | 2007-12-20 | 2009-06-24 | 通用汽车环球科技运作公司 | Hydraulically lashed end pivot rocker arm |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3550974A (en) * | 1969-05-26 | 1970-12-29 | Trw Inc | Bearing seal |
| US4955462A (en) * | 1989-09-05 | 1990-09-11 | Produits Carmine Inc. | Polymer concrete conveyor roller |
| JPH08270662A (en) * | 1995-02-03 | 1996-10-15 | Koyo Seiko Co Ltd | Seal device for bearing |
| SE9800517D0 (en) * | 1998-02-23 | 1998-02-23 | Skf Sverige Ab | Bearing seals |
| DE19844202A1 (en) | 1998-09-26 | 2000-03-30 | Schaeffler Waelzlager Ohg | Internal combustion engine valve tappet comprises inner and outer section coupled and decoupled via spring-powered slide in section mountings to maximize or zero gas valve stroke |
| US7263956B2 (en) * | 1999-07-01 | 2007-09-04 | Delphi Technologies, Inc. | Valve lifter assembly for selectively deactivating a cylinder |
| EP1222374B1 (en) * | 1999-09-10 | 2010-01-27 | Diesel Engine Retarders, Inc. | Lost motion rocker arm system with integrated compression brake |
| JP2001084716A (en) * | 1999-09-14 | 2001-03-30 | Minebea Co Ltd | Pivot assembly for driving magnetic head |
| JP4238151B2 (en) * | 2004-01-30 | 2009-03-11 | 本田技研工業株式会社 | Engine valve gear |
| EP2159437B1 (en) * | 2004-08-02 | 2018-10-17 | NTN Corporation | Rolling bearing for rocker arm |
| EP1881166A1 (en) * | 2006-07-21 | 2008-01-23 | Schaeffler KG | Switchable valve operating mechanism for a combustion engine |
| US7412952B2 (en) * | 2006-12-08 | 2008-08-19 | Ford Global Technologies, Llc | Poppet valve operating system for internal combustion engine |
| US7857320B1 (en) * | 2009-06-03 | 2010-12-28 | Chang Ming S | Bearing isolator seal with floating ring |
-
2011
- 2011-01-24 DE DE102011003023A patent/DE102011003023A1/en not_active Withdrawn
- 2011-11-14 US US13/295,458 patent/US20120186549A1/en not_active Abandoned
-
2012
- 2012-01-19 CN CN2012100176194A patent/CN102606247A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741078A1 (en) * | 1997-09-18 | 1999-03-25 | Schaeffler Waelzlager Ohg | Turning or tilting lever for internal combustion engine valve drive |
| US6230676B1 (en) * | 1999-04-23 | 2001-05-15 | Toledo Technologies Inc. | Interchangeable rocker arm assembly |
| US6786645B2 (en) * | 2001-11-21 | 2004-09-07 | The Timken Company | Mounting for vehicular road wheel |
| EP1338760A2 (en) * | 2002-02-26 | 2003-08-27 | Delphi Technologies, Inc. | Two-step roller finger cam follower having spool-shaped low-lift roller |
| US20040202393A1 (en) * | 2002-05-22 | 2004-10-14 | Takashi Masui | Self-aligning bearing |
| CN101463737A (en) * | 2007-12-20 | 2009-06-24 | 通用汽车环球科技运作公司 | Hydraulically lashed end pivot rocker arm |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179038A (en) * | 2015-10-30 | 2015-12-23 | 绵阳富临精工机械股份有限公司 | Low-rotational-inertia valve rocker |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120186549A1 (en) | 2012-07-26 |
| DE102011003023A1 (en) | 2012-07-26 |
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Owner name: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Effective date: 20150722 |
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Free format text: CORRECT: APPLICANT; FROM: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., KG TO: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Free format text: CORRECT: ADDRESS; FROM: Free format text: CORRECT: APPLICANT; FROM: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG TO: SCHAEFFLER TECHNOLOGY GMBH + CO. KG |
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Application publication date: 20120725 |