CN103291395A - Rocker arm - Google Patents
Rocker arm Download PDFInfo
- Publication number
- CN103291395A CN103291395A CN2013100643514A CN201310064351A CN103291395A CN 103291395 A CN103291395 A CN 103291395A CN 2013100643514 A CN2013100643514 A CN 2013100643514A CN 201310064351 A CN201310064351 A CN 201310064351A CN 103291395 A CN103291395 A CN 103291395A
- Authority
- CN
- China
- Prior art keywords
- rocking arm
- cam
- arm body
- gas exchange
- end section
- 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
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 15
- 230000004888 barrier function Effects 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
- F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
-
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
Rocker arm for actuating at least one gas exchange valve of an internal combustion engine having an elongated lever body (2) with a floor (3) and with side walls (4,5) angled away therefrom, wherein a first end section (6) of the lever body (2) has a cup (9) for a support element formed in the floor (3), and in that a section (7) near the center is provided with a cam engagement surface and in that a second end section (8) of the lever body (2) has a contact surface (12) for a valve stem end of the gas exchange valve, wherein a crossbar (13) extends between the section (7) near the center and the second end section (8), wherein the crossbar (13) has a stamping 14) that is provided on the side facing away from the section (7) near the center.
Description
Technical field
The present invention relates to a kind of rocking arm of the gas exchange valve door for operating internal-combustion engines
Background technique
In internal-combustion engine, rocking arm is arranged in the inside of tappet gear as the transfer element between cam and the gas exchange valve door to be operated.Rocking arm is made up of the arm body, and this arm body acts on to be opened gas exchange valve door at the supporting member place and with its another end via surface of contact by means of its end portion supports.In the centre portion of arm body, be provided with cam and kowtow the face of hitting
, during internal combustion engine operation, the cam of camshaft is kowtowed the rotation campaign of hitting the face collision and causing rocking arm at cam.Cam is kowtowed the face of hitting can be configured to slip surface or cam bawl (Nockenrolle).
Rocking arm by the known gas exchange valve door for operating internal-combustion engines of DE102008029333A1.Rocking arm has oval-shaped opening in its end, and this opening is gathered around the valve rod end of enclosing the gas exchange valve door.In addition, rocking arm is provided with cam bawl at centre portion.
WO2011/157499A1 discloses a kind of rocking arm, and it has cam bawl, and this cam bawl is bearing on the bolt by means of needle roller and retainer assembly.Be provided with the surface of contact for the valve rod end of gas exchange valve door in the end of rocking arm, in order in the surface of contact zone, to be provided with hyoplastron at valve rod end guiding rocking arm.
Summary of the invention
Task of the present invention is, a kind of rocking arm is provided, and it can make and ensure enough rigidity at low cost.
According to the present invention, at least one the gas exchange valve door of this task by being used for operating internal-combustion engines, the rocking arm that has the elongated arm body solves, this arm body has the bottom and bends the sidewall that thus, wherein, the first end section of arm body has for supporting member, the ball-and-socket of moulding (einformen) in the bottom, and centre portion is provided with cam and kowtows the second end section of the face of hitting and arm body and have surface of contact for the valve rod end of gas exchange valve door, wherein, laterally barrier distributes between centre portion and the second end section, and wherein, laterally barrier has pressing part
, this pressing part is arranged on that side that deviates from centre portion.
In foundation rocking arm of the present invention, laterally barrier is provided with pressing part.Pressing part for example can be die marks portion
When rocking arm rotation campaign, laterally the pressing part of barrier can be avoided contacting between valve rod end and the arm body.The reinforcing of necessity of rocking arm ensures that by horizontal barrier it has improved the intensity of rocking arm again.
In the preferred design proposal of the present invention, the form fit of pressing part is in the valve rod end.The shape that this means pressing part is embodied as the shape that is complementary to the valve rod end.Preferably, pressing part is embodied as the moulding part (Einformung) of cylindricality.
Preferably, the second end section of arm body has the profile of approximate W shape from cross section.By the profile of approximate W shape, cancelled known from prior art, be necessary hyoplastron for the guiding valve.This has following advantage, that is, can reduce the raw material operating weight and can reduce manufacture cost thus.The profile of approximate W shape is preferably opened in the direction that deviates from the gas exchange valve door.But the opposite layout of the profile of approximate W shape also is feasible.
In another design proposal of the present invention, the longitudinal center of ball-and-socket and cam kowtow distance between the center of gas exchange valve door contact area on longitudinal center that distance between the center of rotation of the face of hitting is ball-and-socket and the surface of contact half or littler.Therefore, cam is kowtowed the location, contact area ground that the face of hitting can be adjacent to the gas exchange valve door.This has following advantage,, can shorten the total length of rocking arm that is, in order to obtain compact structure.
In design proposal, cam is kowtowed the face of hitting and is constructed by cam bawl, and wherein, centre portion has be used to the groove that holds cam bawl in the bottom.By the groove in the bottom, for cam bawl is created necessary free space, thereby the rotational motion of cam bawl is possible.
Preferably, the arm body is made with bending ram technology or impact extruded ground by sheet material.Yet other material and manufacturing process also are feasible.
Description of drawings
Below, embodiments of the invention illustrate by three accompanying drawings.Wherein:
Fig. 1 illustrates according to rocking arm of the present invention with stereogram;
Fig. 2 illustrates the worm's eye view according to rocking arm of the present invention;
Fig. 3 illustrates the sectional arrangement drawing that passes according to rocking arm of the present invention.
Embodiment
Fig. 1 illustrates respectively in different views according to rocking arm 1 of the present invention with Fig. 2.Rocking arm 1 has elongated arm body 2, and it has bottom 3 and bends the sidewall 4,5 that thus.Bottom 3 and sidewall 4,5 are configured to from the profile of cross section approximate W shape.In addition, the arm body 2 by the sheet material manufacturing is divided into first end section 6, centre portion 7 and the second end section 8.
Moulding goes out ball-and-socket 9 in the part that is distributed in first end section 6 places of bottom 3, and it lifts between sidewall 4,5.Ball-and-socket 9 is used for supporting unshowned supporting member.
In the zone of centre portion 7, each sidewall 4,5 has hole 10, and it is used for the unshowned cam bawl of supporting.Unshowned cam bawl defines cam and kowtows the face of hitting.Being provided with external frame in the part that is distributed in centre portion 7 places of bottom 3 is the groove 11 of rectangle.
On the part at the second end section 8 places that are distributed in arm body 2 of bottom 3, be provided with surface of contact 12 at the unshowned valve rod end of gas exchange valve door.Laterally barrier 13 distributes between the second end section 8 and centre portion 7, and laterally barrier 13 also is arranged between the sidewall 4,5.Laterally barrier 13 has pressing part 14 in that side that deviates from centre portion 7, and this pressing part is embodied as the moulding part of cylindricality.Pressing part 14 makes the following possibility that becomes, and, when the rotation campaign of rocking arm 1, has the surface of contact free travel (Freigang) enough with respect to unshowned gas exchange valve door that is.
Fig. 3 illustrates the sectional arrangement drawing that passes according to rocking arm 1 of the present invention.Therefrom show the correlation of each section.In first end section 6, ball-and-socket 9 has longitudinal center 15.Hole 10 correspondingly has central point 16, and this central point defines the center of rotation 17 of kowtowing the face of hitting at cam.Surface of contact 12 defines the contact area 18 of unshowned gas exchange valve door.
Distance L 1 is limited between the longitudinal center 15 of ball-and-socket 9 and the center of rotation 17 that cam is kowtowed the face of hitting.Distance L 2 is limited between the center of the longitudinal center 15 of ball-and-socket 9 and gas exchange valve door contact area 18.At this, distance L 1 be distance L 2 half or littler.Make arm body 2 short, compactness become possibility by this distance relation.
Reference numerals list
1 rocking arm
2 arm bodies
3 bottoms
4 sidewalls
5 sidewalls
6 first end sections
7 centre portions
8 the second end sections
9 ball-and-sockets
10 holes
11 grooves
12 surface of contact
13 horizontal barriers
14 pressing parts
The longitudinal center of 15 ball-and-sockets
16 central points
17 centers of rotation
The contact area of 18 gas exchange valve doors
The L1 distance
The L2 distance
Claims (6)
1. be used at least one gas exchange valve door of operating internal-combustion engines, the rocking arm that has elongated arm body (2), described arm body has bottom (3) and bends the sidewall (4 that thus, 5), wherein, the first end section (6) of described arm body (2) has for supporting member, the ball-and-socket (9) in the described bottom (3) is arrived in moulding, and centre portion (7) is provided with cam and kowtows the second end section (8) of the face of hitting and described arm body (2) and have surface of contact (12) for the valve rod end of described gas exchange valve door, wherein, laterally barrier (13) distributes between described centre portion (7) and described the second end section (8), it is characterized in that, described horizontal barrier (13) has pressing part (14), and described pressing part is arranged on that side that deviates from described centre portion (7).
2. rocking arm according to claim 1, wherein, the form fit of described pressing part (14) is in described valve rod end.
3. according to one of aforesaid right requirement described rocking arm, wherein, the second end section (8) of described arm body (2) has the profile of approximate W shape from cross section.
4. according to one of aforesaid right requirement described rocking arm, wherein, the longitudinal center (15) of described ball-and-socket (9) and described cam kowtow the face of hitting center of rotation (17) between distance (L1) be the longitudinal center (15) of described ball-and-socket (9) and described surface of contact (12) go up distance (L2) between the center of gas exchange valve door contact area (18) half or littler.
5. according to one of aforesaid right requirement described rocking arm, wherein, described cam is kowtowed the face of hitting and is constructed by cam bawl, and wherein, described centre portion has be used to the groove that holds described cam bawl (11) in described bottom.
6. according to one of aforesaid right requirement described rocking arm, wherein, described arm body (2) is made with bending ram technology or impact extruded ground by sheet material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012203107.3 | 2012-02-29 | ||
| DE102012203107A DE102012203107A1 (en) | 2012-02-29 | 2012-02-29 | cam follower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103291395A true CN103291395A (en) | 2013-09-11 |
Family
ID=48950832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100643514A Pending CN103291395A (en) | 2012-02-29 | 2013-02-28 | Rocker arm |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20130220254A1 (en) |
| CN (1) | CN103291395A (en) |
| DE (1) | DE102012203107A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012204727A1 (en) * | 2012-03-23 | 2013-09-26 | Schaeffler Technologies AG & Co. KG | cam follower |
| JP6769691B2 (en) * | 2014-12-26 | 2020-10-14 | 株式会社オティックス | Rocker arm manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251585A (en) * | 1992-02-12 | 1993-10-12 | Erich Neumayer Gmbh & Co. K.G. | Two-armed lever |
| US20040134065A1 (en) * | 2001-04-19 | 2004-07-15 | Satoshi Kadokawa | Metal plate rocker arm and method of manufacturing the metal plate rocker arm |
| WO2008055785A1 (en) * | 2006-11-09 | 2008-05-15 | Schaeffler Kg | Cam follower for actuating a gas exchange valve of an internal combustion engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960014920B1 (en) * | 1992-01-07 | 1996-10-21 | 나까무라 유이찌 | Roller rocker arm & process for manufacturing the same |
| US5720245A (en) * | 1995-11-13 | 1998-02-24 | Sandco Automotive Limited | Finger follower arm |
| DE102008029333A1 (en) | 2008-06-20 | 2009-12-24 | Schaeffler Kg | Gas exchange valves switching-off device for internal combustion engine, has valve shaft and/or retaining cover encompassing end of valve shaft, where valve shaft and/or retaining cover are passed and/or penetrated into oval opening |
| DE102010024196A1 (en) | 2010-06-17 | 2011-12-22 | Schaeffler Technologies Gmbh & Co. Kg | Drag lever for a valve train of an internal combustion engine |
-
2012
- 2012-02-29 DE DE102012203107A patent/DE102012203107A1/en not_active Withdrawn
-
2013
- 2013-02-28 US US13/780,889 patent/US20130220254A1/en not_active Abandoned
- 2013-02-28 CN CN2013100643514A patent/CN103291395A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251585A (en) * | 1992-02-12 | 1993-10-12 | Erich Neumayer Gmbh & Co. K.G. | Two-armed lever |
| US20040134065A1 (en) * | 2001-04-19 | 2004-07-15 | Satoshi Kadokawa | Metal plate rocker arm and method of manufacturing the metal plate rocker arm |
| US6932040B2 (en) * | 2001-04-19 | 2005-08-23 | Nsk Ltd. | Metal plate rocker arm and method of manufacturing the metal plate rocker arm |
| WO2008055785A1 (en) * | 2006-11-09 | 2008-05-15 | Schaeffler Kg | Cam follower for actuating a gas exchange valve of an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012203107A1 (en) | 2013-08-29 |
| US20130220254A1 (en) | 2013-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Effective date: 20150728 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: German Herzogenaurach Applicant after: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG Address before: German Herzogenaurach Applicant before: Fifth Schaeffler investment management GmbH & Co.KG Address after: German Herzogenaurach Applicant after: SCHAEFFLER TECHNOLOGIES AG & CO.KG Address before: German Herzogenaurach Applicant before: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., KG TO: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Free format text: CORRECT: APPLICANT; FROM: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG TO: SCHAEFFLER TECHNOLOGY GMBH + CO. KG Free format text: CORRECT: ADDRESS; FROM: |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20150728 Address after: German Herzogenaurach Applicant after: Fifth Schaeffler investment management GmbH & Co.KG Address before: German Herzogenaurach Applicant before: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20180622 |