WO2007114381A1 - Dispositif de poussoir de soupape - Google Patents

Dispositif de poussoir de soupape Download PDF

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Publication number
WO2007114381A1
WO2007114381A1 PCT/JP2007/057246 JP2007057246W WO2007114381A1 WO 2007114381 A1 WO2007114381 A1 WO 2007114381A1 JP 2007057246 W JP2007057246 W JP 2007057246W WO 2007114381 A1 WO2007114381 A1 WO 2007114381A1
Authority
WO
WIPO (PCT)
Prior art keywords
rocker arms
pair
cam follower
rocker
follower device
Prior art date
Application number
PCT/JP2007/057246
Other languages
English (en)
Japanese (ja)
Inventor
Noriyuki Takeo
Original Assignee
Nsk Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2006238741A external-priority patent/JP2008057514A/ja
Priority claimed from JP2006282123A external-priority patent/JP2007292042A/ja
Application filed by Nsk Ltd. filed Critical Nsk Ltd.
Priority to EP07740682A priority Critical patent/EP2003295A2/fr
Priority to US12/295,056 priority patent/US20090173300A1/en
Publication of WO2007114381A1 publication Critical patent/WO2007114381A1/fr

Links

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
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F01L1/185—Overhead end-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
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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

Definitions

  • the cam follower device has two or more of at least one of an intake valve and an exhaust valve provided in one cylinder, such as a 3-valve engine, a 4-valve engine, and a 5-valve engine. It is built into the valve mechanism of the engine and used to convert the rotation of the camshaft into reciprocating motion of two intake valves or two exhaust valves.
  • the support shaft 7 is fixed in a state where the support wall portions 6 and 6 are spanned.
  • both end portions of the support shaft 7 are fitted and fixed to a pair of support holes 8 and 8 formed at positions where the both support wall portions 6 and 6 are aligned with each other.
  • This support A tappet roller 9 is rotatably supported around a middle portion of the shaft 7 via a radial-one dollar bearing 10. The outer peripheral surface of the tappet roller 9 is brought into contact with the outer peripheral surface of the cam 2. Further, a screw hole (not shown) is provided at the other end portion (left end portion in FIG.
  • an adjustment screw 11 is screwed and fixed to the screw hole.
  • the distal end portion (pressing portion) of the adjustment screw 11 is abutted against the base end surface of the valve body 12 that is an intake valve or an exhaust valve.
  • the cam follower device of the present invention is an invention for realizing a structure capable of reducing the number of cams and tappet rollers to be used when configuring a valve operating mechanism of a multi-valve engine. It is a thing. Means for solving the problem
  • the rocker arm is provided directly at the other end of the rocker arm or through a separate member, and in a state where it is incorporated in the valve operating mechanism, it projects one by one into the base end face of two intake valves or two exhaust valves.
  • a cam follower device comprising a pair of pressing portions that can be applied.
  • the pair of support holes are formed in an intermediate portion of the pair of rocker arms, and one end portions of both the rocker arms are provided directly or via another member, and the valve mechanism
  • the two rockers having a pair of receiving portions capable of abutting the distal end surfaces of the pair of plungers in a state where they are assembled, and having a contact portion between the both receiving portions and the distal end surfaces of the plungers as fulcrums
  • the cam follower device described in (2) which enables swinging of the arm.
  • the pair of support holes are formed at one end of the pair of rocker arms, and in a state where the pair of support holes are aligned with each other at an intermediate portion of the rocker arms, A pair of concentric through-holes that can pass through a rocker shaft provided in parallel with the camshaft are formed, and the swinging displacement of the both mouths of the rocker shaft around the rocker shaft is enabled.
  • the pair of rocker arms which are coupled so as not to be displaced relative to each other by the at least one continuous portion, are formed by punching and bending a single metal plate.
  • Cam follower device
  • the cam follower device of the present invention configured as described above is used to configure an engine valve mechanism in which at least one of the intake valves and exhaust valves provided in one cylinder is two or more. Two intake valves or two exhaust valves can be opened and closed at the same time by installing only one cam and tappet roller. For this reason, as compared with the case where only the conventional cam follower device as described above is used as the cam follower device incorporated in the valve operating mechanism, this valve operating device is used. The number of parts can be reduced. Therefore, the valve operating mechanism can be reduced in size (space saving), reduced in weight, reduced in friction, reduced in cost, and the like.
  • rocker arms may not be relatively displaced by at least one continuous portion. If they are combined, the conventional phase adjustment work becomes unnecessary when assembling the cam follower device to the engine.
  • FIG. 1 is a side view showing a first example of an embodiment of the present invention in a state where the first example is incorporated in a valve mechanism of an engine.
  • FIG. 11 is a view of the left end portion of the upper rocker arm in FIG. 10 as viewed from the inner surface side of the left end portion.
  • FIG. 13 is a view similar to FIG. 2, showing the fourth example in a partially cut state.
  • FIG. 15 is a view similar to FIG. 2, showing a fifth example of the embodiment of the invention with a part thereof cut away.
  • FIG. 17 is a view similar to FIG. 1, showing a seventh example of the embodiment of the present invention.
  • FIG. 19 is a diagram corresponding to the central portion of FIG. 18, showing an eighth example of the embodiment of the present invention.
  • FIG. 22 is a cross-sectional view taken along the line XXII-XXII in FIG.
  • FIG. 24 (a) is a diagram similar to FIG. 2 showing a modification of the tenth example
  • FIG. 24 (b) is a diagram showing another modification of the tenth example
  • FIG. FIG. 25 is a side view showing an eleventh example of the embodiment of the present invention in a state where the eleventh example is incorporated in a valve operating mechanism of an engine.
  • FIG. 27 (a) is a diagram for explaining the first step of punching a piece of metal to form a rocker arm
  • FIG. 27 (b) is a diagram showing the bending force after the punching force. It is a figure explaining the 2nd process of giving rockers and forming a rocker arm.
  • FIG. 30 is a partial side view of a valve operating mechanism of an engine assembled with a first example of a conventional cam follower device.
  • FIG. 32 is a perspective view showing a second example of a conventional cam follower device.
  • FIG. 33 is a cross-sectional view taken along the line ⁇ in FIG.
  • the cam follower device of this example is an engine (OHC type) in which at least one of an intake valve and an exhaust valve provided in one cylinder is two or more, such as a 3-valve engine, a 4-valve engine, and a 5-valve engine. Or DOHC type).
  • OHC type engine
  • Such a cam follower device of this example includes a pair of plate-like rocker arms 17, 17 having the same shape and the same size, one support shaft 7 a, and one tappet roller 9.
  • both ends of the support shaft 7a are placed inside the support holes 8a and 8a, and the support holes 8a and 8a are connected to each other. It press-fits through the opening on the opposite side.
  • the tappet roller 9 is rotatably supported on the outer peripheral surface of the intermediate portion of the support shaft 7 a via a radial-dollar bearing 10.
  • a pair of concentric through holes 4, 4 are formed at positions where they are aligned with each other at an intermediate portion between the rocker arms 17, 17.
  • the above A pair of convex portions 18 and 18 (pressing portions) are provided on the lower surfaces of the other end portions of the rocker arms 17 and 17 (left end portions in FIGS. 1 and 2).
  • the front end surfaces of these convex portions 18 and 18 are each a partial cylindrical surface.
  • rocker arms 17 and 17 are formed in the same shape and size, this is not necessary. It is possible to effectively prevent a difference in the contact state between the rocker arms 17 and 17 and the other parts such as valves by making the positional relationship between the rocker arms 17 and 17 appropriate.
  • rocker arms 17a to 17e as shown in Figs. 5 to 9 can be used as a pair of rocker arms, respectively. .
  • Each of these rocker arms 17a to 17e is different from the rocker arm 17 described above in the shape of at least the other end (the left end in FIGS. 5 to 9).
  • the rocker arm 17a shown in FIG. 5 has a pair of holding pieces 19 and 19 protruding from both sides of the convex portion 18 provided on the lower surface of the other end portion (left and right in FIG. 5). ing.
  • the rocker arm 17d shown in FIG. 8 is formed integrally with the cylindrical portion 25 at the other end by bending.
  • the inside of the cylindrical portion 25 is used as a through hole (or screw hole) 24 for internally fitting (or screwing) an unillustrated adjusting bin (or adjusting screw).
  • a burring force is applied to the peripheral part of the through hole 4.
  • a rocker arm 17e shown in FIG. 9 has a cylindrical member 27 joined and fixed to the other end by welding, electrodeposition or the like.
  • the inside of the cylindrical member 27 is used as a through hole (or screw hole) 24 for fixing (or screwing) an adjustment pin (or adjustment screw) (not shown) described above.
  • a sleeve 28 is fitted and fixed inside the through hole 4, The rocker shaft 5 is passed through the inside of the sleeve 28.
  • FIGS. 10 to 11 show a second example of the embodiment of the present invention.
  • the thick parts are 31 and 31, respectively.
  • the inner side surfaces of the other end portions of the two-mouth cker arms 17h and 17h are bulged.
  • the thickness dimension T of the other end portions of the rocker arms 17h, 17h (both the thick wall portions 31, 31) is set to be larger than the thickness dimension t of one end portion (the right end portion in FIG. 10) and the intermediate portion.
  • FIG. 12 shows a third example of the embodiment of the present invention.
  • the thick parts are 31a and 31a, respectively.
  • the both side surfaces of the other end portions of the two-mouth cker arms 17i and 17i are bulged.
  • Other configurations and operations are the same as those of the second example of the embodiment described above.
  • FIG. 13 shows a fourth example of the embodiment of the present invention.
  • the distance between the pair of valve bodies 12 and 12 to be pressed is significantly larger than in the case of each of the embodiments described above.
  • the distance between the pair of rocker arms 17i, 17i is greatly increased compared to the case of each of the above-described embodiments in accordance with the distance between the two valve bodies 12, 12. To make it bigger.
  • the tappet roller 9 disposed between the one end portions (the right end portion in FIG. 13) of both the rocker arms 17i and 17i has the same axis as in the above-described embodiments. Those with directional dimensions are used.
  • FIG. 19 shows an eighth example of the embodiment of the present invention.
  • a radial-dollar bearing 36 is provided between the inner peripheral surface of the cylindrical sleeve 29 and the outer peripheral surface of the rocker shaft 5.
  • a pair of circular rings in which the inner peripheral edges of the outer surfaces of the pair of rocker arms 17f, 17f are opposed to the outer peripheral surface of the rocker shaft 5 at the peripheral portions of the through holes 4a, 4a.
  • Plates 37 and 37 are connected and fixed. The radial-single bearing 36 is prevented from falling outside through the openings at both ends of the sleeve 29 by the inner peripheral edge portions of the two circular plates 37 and 37.
  • FIGS. 20 to 22 show a ninth example of the embodiment of the invention.
  • a pair of tappet rollers 9 rotatably supported via a radial-single bearing 10 around the support shaft 7a.
  • the plate-like rockerarms 17g and 17g are arranged in the middle part of each other. For this reason, in the case of this example, both ends of the support shaft 7a are press-fitted (engaged with the selection), and a pair of support holes 8a and 8a are connected to each other at an intermediate portion of the pair of plate-like rocker arms 17g and 17g They are concentrically formed at aligned positions.
  • spherical recesses 30 and 30 are provided on the lower surfaces of one end portions (right end portions in FIGS. 20 to 21) of both rocker arms 17g and 17g, respectively.
  • the same convex portion 18 is provided on the lower surface of the other end portion (the left end portion in FIGS. 20 to 21) of the double-ended kicker arms 17g and 17g. 18 is provided on the lower surface of the other end portion (the left end portion in FIGS. 20 to 21) of the double-ended kicker arms 17g and 17g.
  • a pair of both ends of the support shaft 7a that does not damage the outer peripheral surface of the intermediate portion of the support shaft 7a is paired. It can be press-fitted into the support holes 8a and 8a. For this reason, as a method for hardening the surface of the support shaft 7a, it is possible to employ submerged quenching which is cheaper than induction quenching. Therefore, the manufacturing cost can be reduced accordingly. Also in this example, the shape of the other end of the rocker arms 17a to 17e, 17h and 17i shown in FIGS. 5 to 12 can be adopted as the shape of the other end of the pair of rocker arms. it can.
  • the both rocker arms 17q, 17q are widened so that both end portions of the support shaft 7a are connected to the both support holes 8a,
  • the two support holes 8a and 8a are press-fitted into the inside of 8a through the openings on the sides facing each other.
  • the angle of the continuous portion between the rocker arms 17q, 17q and the connecting portion 38 is increased (a size exceeding 90 degrees).
  • the connecting portion 38 prevents the rocker arms 17q and 17q from swinging relative to the support shaft 7a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

L'invention concerne un dispositif de poussoir de soupape qui comporte une paire de culbuteurs (17, 17) en forme de plaque disposés parallèlement l'un à l'autre, un arbre de support (7a) ayant ses deux extrémités emmanchées à la presse dans des trous support (8a, 8a) formés à une extrémité de chaque culbuteur (17, 17) et un galet de poussoir (9) soutenu de façon à pouvoir tourner autour d'une partie intermédiaire de l'arbre de support (7a). Lorsque ledit dispositif de poussoir de soupape est monté dans un dispositif de commande des soupapes, le mouvement de rotation d'une came (2) formée sur un arbre à cames est transmis par le galet de poussoir (9) et la paire de culbuteurs (17, 17) aux éléments de soupape (12, 12) qui sont deux soupapes d'admission (ou soupapes d'échappement) et de ce fait ces deux éléments de soupape (12, 12) ont un mouvement de va-et-vient dans leur direction axiale. Cette configuration peut réduire le nombre de pièces composant le dispositif de commande des soupapes d'un moteur lorsque le nombre des soupapes d'admission et/ou des soupapes d'échappement dans un cylindre est égal à deux ou plus.
PCT/JP2007/057246 2006-03-31 2007-03-30 Dispositif de poussoir de soupape WO2007114381A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07740682A EP2003295A2 (fr) 2006-03-31 2007-03-30 Dispositif de poussoir de soupape
US12/295,056 US20090173300A1 (en) 2006-03-31 2007-03-30 Cam follower device

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2006096399 2006-03-31
JP2006-096399 2006-03-31
JP2006-238741 2006-09-04
JP2006238741A JP2008057514A (ja) 2006-09-04 2006-09-04 カムフォロア装置
JP2006-282123 2006-10-17
JP2006282123A JP2007292042A (ja) 2006-03-31 2006-10-17 カムフォロア装置

Publications (1)

Publication Number Publication Date
WO2007114381A1 true WO2007114381A1 (fr) 2007-10-11

Family

ID=38563648

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/057246 WO2007114381A1 (fr) 2006-03-31 2007-03-30 Dispositif de poussoir de soupape

Country Status (3)

Country Link
US (1) US20090173300A1 (fr)
EP (1) EP2003295A2 (fr)
WO (1) WO2007114381A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9179796B2 (en) * 2010-09-22 2015-11-10 Cornelia Bean Ltd. Beverage making container for placement onto a cup
DE102011012614A1 (de) 2011-02-28 2012-08-30 Neumayer Tekfor Holding Gmbh Nockenfolger und Ventiltrieb

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09217751A (ja) * 1996-02-09 1997-08-19 Nippon Seiko Kk 軸受装置
JP2004084478A (ja) * 2002-08-22 2004-03-18 Toyota Motor Corp ロッカーアーム
JP2004100499A (ja) 2002-09-06 2004-04-02 Nsk Ltd カムフォロア装置
JP2004132303A (ja) * 2002-10-11 2004-04-30 Koyo Seiko Co Ltd ロッカアーム
JP2005009352A (ja) * 2003-06-17 2005-01-13 Honda Motor Co Ltd 内燃機関の動弁装置
JP2006096399A (ja) 2004-09-30 2006-04-13 Lion Corp 段ボール箱
JP2006238741A (ja) 2005-03-01 2006-09-14 Nagasaki Univ 流れ藻捕集装置と藻場の生成方法
JP2006282123A (ja) 2005-04-05 2006-10-19 Toyota Motor Corp 太陽電池出力により空調出力が制御される車輌

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614171A (en) * 1985-07-05 1986-09-30 W H Industries Inc. Rocker arm construction
JP3535431B2 (ja) * 1999-12-28 2004-06-07 本田技研工業株式会社 内燃機関の動弁装置
JP2003206708A (ja) * 2002-01-16 2003-07-25 Ntn Corp ローラ付きカムフォロア

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09217751A (ja) * 1996-02-09 1997-08-19 Nippon Seiko Kk 軸受装置
JP2004084478A (ja) * 2002-08-22 2004-03-18 Toyota Motor Corp ロッカーアーム
JP2004100499A (ja) 2002-09-06 2004-04-02 Nsk Ltd カムフォロア装置
JP2004132303A (ja) * 2002-10-11 2004-04-30 Koyo Seiko Co Ltd ロッカアーム
JP2005009352A (ja) * 2003-06-17 2005-01-13 Honda Motor Co Ltd 内燃機関の動弁装置
JP2006096399A (ja) 2004-09-30 2006-04-13 Lion Corp 段ボール箱
JP2006238741A (ja) 2005-03-01 2006-09-14 Nagasaki Univ 流れ藻捕集装置と藻場の生成方法
JP2006282123A (ja) 2005-04-05 2006-10-19 Toyota Motor Corp 太陽電池出力により空調出力が制御される車輌

Also Published As

Publication number Publication date
EP2003295A2 (fr) 2008-12-17
US20090173300A1 (en) 2009-07-09

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