WO1995000749A1 - Poussoir de soupape a action directe destine aux moteurs a combustion interne - Google Patents

Poussoir de soupape a action directe destine aux moteurs a combustion interne Download PDF

Info

Publication number
WO1995000749A1
WO1995000749A1 PCT/JP1994/000955 JP9400955W WO9500749A1 WO 1995000749 A1 WO1995000749 A1 WO 1995000749A1 JP 9400955 W JP9400955 W JP 9400955W WO 9500749 A1 WO9500749 A1 WO 9500749A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve lifter
internal combustion
shim
ceiling
direct
Prior art date
Application number
PCT/JP1994/000955
Other languages
English (en)
Japanese (ja)
Inventor
Akihiko Hosaka
Original Assignee
Nittan Valve Co., 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
Application filed by Nittan Valve Co., Ltd. filed Critical Nittan Valve Co., Ltd.
Publication of WO1995000749A1 publication Critical patent/WO1995000749A1/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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/205—Adjusting or compensating clearance by means of shims or the like
    • 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
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • 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
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem

Definitions

  • the present invention relates to a valve lifter for an internal combustion engine which is interposed between a valve stem and a cam to adjust a valve clearance.
  • a shim seat is provided on a top surface of a disk-shaped ceiling portion of a power-up type valve lifter body.
  • the present invention relates to a direct-acting valve lifter in which a valve stem abutment portion is formed on the back surface of a ceiling portion.
  • Fig. 15 shows a valve mechanism that uses a valve lift that has a structure in which the ceiling top surface directly contacts the cam.
  • the cup-shaped valve lifter main body a connects the cam b and the valve stem c to the upper end.
  • the valve lifter main body a and the valve stem c are held by the compression coil spring d so as to be constantly urged in the direction to close the valve, and the cam b is connected to the lifter main body a. Is pressed down, whereby the lifter body a slides along the cylinder e to open the valve.
  • the symbol f is a shim placed on the ceiling of the nozzle lifter main body a, and the cam b comes into contact with the shim f by hitting the shim f.
  • the ceiling can be made thinner, and the lifter body can be formed using a material that is not so hard.
  • valve lifter main body a is generally formed by forging or forging, and has a large inertia weight due to its considerable weight, which causes various adverse effects. Furthermore, it is necessary to form a recessed shim seat for accommodating the shim f on the ceiling by cutting, which causes a problem that the number of processes increases accordingly. In addition, there is another problem that the weight of the valve lift can be reduced by making the main body a made of aluminum die-cast.
  • FIG. 16 shows a valve lifter according to Japanese Patent Publication No. 45-354481.
  • the valve lifters a are formed by stamping a metal plate to reduce the weight.
  • a shim guide g is formed on the outer periphery of the ceiling of the lifter main body a, and stands up in a tongue shape at predetermined intervals in the circumferential direction and surrounds the shim seat. As shown in Fig. 17, this shim guide g is used after the valve lifter In addition, it can be easily formed by cutting and raising the ceiling forming wall with a tool h having a cutting edge h,.
  • the shim guide g is spaced apart at a predetermined circumferential interval, so that the strength is weak, and the cylinder e is moved when the valve lifter slides. While Shimugaido to increase the strength of the also c further guide damage in contact with the inner peripheral surface may be thick-walled, on the relationship between, connexion weight of thicker ceiling formed by cutting and raising the ceiling portion Bulging. Also, the shim guide g requires a process of cutting the ceiling with the cutting blade hu, which requires a large number of steps, and the cut and raised tongue-shaped shim guide g always has burrs. It is indispensable to finish processing to remove this burr.
  • the present invention has been made in view of the problems of the prior art, and has as its object to provide a direct-acting valve lifter for an internal combustion engine which is easy to manufacture, lightweight, and has a shim guide excellent in strength. It is in.
  • a cup-shaped valve lifter having a disc-shaped ceiling and a main body is a direct-acting valve lifter for an internal combustion engine molded from a metal plate material, wherein an outer peripheral edge of the ceiling is folded back along the inside of the cylindrical portion.
  • a shim guide surrounding the shim seat is provided around the outer periphery of the ceiling. Since the shim guide extends continuously over the entire outer periphery of the shim seat, the strength is high.
  • the outer peripheral edge of the ceiling portion is folded back along the inner side of the cylindrical portion, so that the outer periphery of the ceiling portion is Sim guides that can be easily formed.
  • a vertical groove is provided on an inner wall constituting the shim guide, and air is blown from the vertical groove provided on the shim guide. Air enters between the shim and the seat and the shim is lifted.
  • a notch is provided in a part of the shim guide.
  • a jig such as a driver is inserted through the notch in the shim guide, and the shim is lifted by inserting the tip of the jig between the shim and the shim seat.
  • the valve lifter body is formed by stamping, and the vertical groove (notch) is formed in the stamping forming step. It is a series of processes for stamping the Norbriff Yuichi body without the need for a new process for forming longitudinal grooves (notches). Can form a vertical groove (notch).
  • the ceiling portion is formed with a reinforcing rib that is recessed in the ceiling surface and protrudes inward.
  • the reinforcing ribs formed on the ceiling enhance the strength of the ceiling.
  • the base contact portion is constituted by a cup-shaped lower projection provided at the center of the ceiling portion. Increases the strength of the ceiling.
  • the hydraulic type lower protrusion is adapted to be applied to a valve operating mechanism of a specification incorporating a hydraulic valve lifter.
  • the amount of protrusion is set so as to match the distance between the sliding surface of the lifter and the contact position of the valve stem.
  • the specifications of other components of the valve mechanism, excluding the valve lift, can be shared between the mechanism and the valve train that incorporates the hydraulic valve lift.
  • FIG. 1 is a perspective view of a valve lift according to a first embodiment of the present invention
  • FIG. 2 is a longitudinal sectional view of the lifter (a sectional view taken along line II-II shown in FIG. 1)
  • FIG. Fig. 3 (a) is a vertical cross-sectional view (cross-sectional view along the line II I-I II shown in Fig. 1).
  • 5 is a perspective view of a valve lifter according to a second embodiment of the present invention
  • FIG. 6 is a longitudinal sectional view of the lifter (shown along lines VI-VI in FIG. 5).
  • 7 is the present invention.
  • FIG. 8 is a perspective view of a valve lifter according to a third embodiment of the present invention
  • FIG. 8 is a perspective view of a valve lifter according to a third embodiment of the present invention
  • FIG. 8 is a longitudinal sectional view of the same lifter (a sectional view along line VI II—VI II shown in FIG. 7), and FIG. FIG. 10 is a longitudinal sectional view of the lifter (a sectional view taken along line X--X shown in FIG. 9), and FIG. 11 is a fifth embodiment of the present invention.
  • FIG. 12 is a longitudinal sectional view of the lifter (a sectional view along line XI I—XI I shown in FIG. 11), and
  • FIG. 13 is a sixth embodiment of the present invention.
  • Fig. 14 is a vertical cross-sectional view of a valve operating mechanism incorporating a mechanical valve lifter.
  • Fig. 14 is a longitudinal section of a valve operating mechanism incorporating a hydraulic valve lifter (a valve operating mechanism that shares parts with the valve operating mechanism shown in Fig. 13).
  • Fig. 15 is a cross-sectional view of a valve operating mechanism using a conventional valve lifter
  • Fig. 16 is a perspective view of another conventional valve lifter
  • Fig. 17 is the same valve lifter.
  • the top surface of the capacitor one is an explanatory diagram that explains the method for forming a Shimugaido.
  • FIGS. 1 to 3 show a first embodiment of the present invention.
  • FIG. 1 is a perspective view of a main body of a valve lifter constituting a valve lifter according to a first embodiment of the present invention
  • FIGS. FIG. 2 is a longitudinal sectional view of the lifter body (a sectional view taken along lines II-II and III-III shown in FIG. 1).
  • a cup-shaped valve lift main body 1OA includes a cylindrical portion 11 and a disk-shaped ceiling portion 12 formed integrally with the cylindrical portion 11, and a thin plate made of an iron alloy is It is formed by bing.
  • a shim seat 13 for mounting the shim 19 is formed on the top surface of the ceiling 12, and a valve stem on the upper end of the valve stem is provided on the back surface of the ceiling 12.
  • the contact portion 14 is formed to protrude.
  • a shim guide 15 having a structure in which the outer peripheral edge of the ceiling portion 12 is folded back along the inside of the cylindrical portion 11 is provided around the outer periphery of the ceiling portion 12.
  • Reference numeral 16 denotes a reinforcing rib provided radially on the top surface of the ceiling 12 to increase the strength of the ceiling 12.
  • Reference numeral 16a indicates a concave portion formed by the rib 16.
  • Reference numeral 17 denotes a circumferential groove provided around the shim seat 13, and the circumferential groove 17 is indispensable for accurately forming the shim seat 13 and the shim guide 15 at right angles. That is, in the stamping molding, the corners of the shim seats 13 are finished at right angles. Therefore, it is not easy because the accuracy of the mold is required, and therefore, as shown in FIG. 3 (a), R is easily formed in the corner portion 13 a of the shim seat 13. If the corner of the shim has an R, the corner 19 a of the shim interferes with the corner 13 a of the shim, and the shim cannot be accommodated properly. However, if the circumferential groove 17 is formed on the outer periphery of the shim seat, the corner portion of the shim seat can be formed at a right angle without requiring the accuracy of the mold.
  • a thin plate is punched into a predetermined size suitable for stamping by a punching process (not shown).
  • a thin plate having a predetermined shape is formed into a cup shape having a cylindrical portion 11 and a ceiling portion 12.
  • the ceiling portion 12 is recessed toward the back side, and the valve stem contact portion 14 is formed.
  • the outer peripheral edge of the ceiling portion 12 is folded back along the inside of the cylindrical portion 11 to form a shim seat 13 and a circumferential groove 17.
  • a reinforcing rib 16 is formed on the ceiling 12.
  • the valve lifter shown in this embodiment is problematic because it is formed by stamping and the cylindrical portion 11 and the ceiling portion 12 are thin, so that the weight and the inertia weight are light and the inertia weight is large.
  • Various problems that have been solved are eliminated.
  • radially extending reinforcing ribs 16 are provided on the ceiling 12 on which the impact force of the cam acts via the shim 19, and the strength of the ceiling 12 is increased. There is no problem in terms of durability.
  • the shim guide 15 is provided around the outer periphery of the ceiling portion 12, it is excellent in strength even if it is thin.
  • FIG. 6 is a perspective view of one valve lifter body
  • FIG. 6 is a longitudinal sectional view of the lifter body (a line VI-VI shown in FIG. 5). (A cross-sectional view along the line).
  • a longitudinal groove 20 connected to the circumferential groove 17 is formed inside the shim guide 15.
  • the circumferential groove 17 communicates with the concave portion 16a of the reinforcing rib 16 by a radial groove 22 extending radially from the ceiling 12 so that the air blown from the vertical groove 20 is reinforced.
  • the other parts are the same as those of the first embodiment, and the description thereof will be omitted by retaining the same reference numerals.
  • the stamping molding process of the valve lifter main body 10B shown in this embodiment is substantially the same as the molding process of the valve lifter main body 1OA shown in the first embodiment (FIGS. 4 (a) to 4 (d)).
  • the longitudinal groove 20 is punched, and in the process shown in FIG. 4 (d), the reinforcing rib 16
  • the horizontal groove 22 is also formed at the same time as the forming.
  • FIG. 7 and 8 show a third embodiment of the present invention.
  • FIG. 7 is a perspective view of the valve lifter main body
  • FIG. 8 is a longitudinal sectional view of the valve lifter main body (the line VI II—VI shown in FIG. 7). Sectional view along II).
  • valve lifter main body 10C shown in this embodiment a part of the shim guide 15 is cut out, a screwdriver 25 is inserted through the cutout 24, and the tip of the screwdriver 25 is shim 19 By sliding between the shim seat 13 and the shim seat 13, the shim 19 is pushed up.
  • the stamping molding process of the valve lifter main body 10C shown in this embodiment is also substantially the same as the molding process of the valve lifter main body 1OA shown in the first embodiment (FIGS. 4 (a) to 4 (d)). F) The only difference is that the notch 24 is punched in the thin plate punching process performed prior to the process shown in Fig. 4 (a).
  • FIG. 9 and 10 show a fourth embodiment of the present invention.
  • FIG. 9 is a perspective view of the valve lifter main body
  • FIG. 10 is a longitudinal sectional view of the same lifter main body (the line X--X shown in FIG. 9). A cross-sectional view along the line).
  • holes 26 are provided at the positions where the reinforcing ribs are formed on the ceiling portion 12 so that the shim can be easily taken out. That is, since air easily enters through the hole 26 between the shim 19 (see FIG. 8) and the shim seat 13, if the shim 19 made of a magnetic material is attracted by a magnet and pulled up, for example, The shim 19 can be easily extracted from the shim seat 13.
  • FIGS. 11 and 12 show a fifth embodiment of the present invention.
  • FIG. 11 is a perspective view of a valve lifter itself
  • FIG. 12 is a longitudinal sectional view of the same lifter body (the line shown in FIG. 11).
  • XI I a cross-sectional view along XI I).
  • a cup-shaped valve lift with a cylindrical part that slides on the cylinder and a disc-shaped ceiling that functions as a shim seat on the top surface and a valve stem contact part on the back surface.
  • the outer peripheral edge of the ceiling is folded back along the inside of the cylindrical portion, and a shim guide surrounding the shim seat is provided around the outer periphery of the ceiling.
  • valve lifter body is formed by stamping, and the notch is formed by punching in a stamping forming process.
  • valve stem contact portion is constituted by a cup-shaped downward projection provided at a center of a ceiling portion.
  • the cup-shaped lower projection should be aligned with the distance between the force-sliding surface of the hydraulic valve lifter and the valve stem contact position so that it can be applied to a valve operating mechanism that incorporates a hydraulic valve lifter.

Landscapes

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

Abstract

Un poussoir de soupape à action directe, destiné aux moteurs à combustion interne, comporte un corps en forme de coupelle doté d'une partie cylindrique (11), en contact coulissant avec un cylindre, et une partie supérieure (12) de type disque qui fait office, à sa surface supérieure, de siège de rondelle d'épaisseur (13) et, à sa surface inférieure, de tige de soupape en contact avec la partie (12). Ce poussoir est moulé à partir d'une feuille métallique et une partie de la circonférence externe de la partie supérieure (12) est repliée le long du côté interne de la partie cylindrique (11). On crée ainsi un guide de rondelle d'épaisseur (15), qui entoure le siège (13) de cette rondelle, sur la circonférence externe de la partie supérieure (12). Grâce à cette construction, on obtient une réduction de poids du poussoir de soupape, une bonne résistance pour le guide de rondelle d'épaisseur, ainsi qu'une fabrication de ce poussoir facilitée.
PCT/JP1994/000955 1993-06-23 1994-06-14 Poussoir de soupape a action directe destine aux moteurs a combustion interne WO1995000749A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15176093 1993-06-23
JP5/151760 1993-06-23

Publications (1)

Publication Number Publication Date
WO1995000749A1 true WO1995000749A1 (fr) 1995-01-05

Family

ID=15525700

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1994/000955 WO1995000749A1 (fr) 1993-06-23 1994-06-14 Poussoir de soupape a action directe destine aux moteurs a combustion interne

Country Status (1)

Country Link
WO (1) WO1995000749A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712655A1 (de) * 1997-03-26 1998-10-01 Schaeffler Waelzlager Ohg Mechanischer Ventilstößel für eine Brennkraftmaschine
DE10106983A1 (de) * 2001-02-15 2002-08-29 Ina Schaeffler Kg Stößel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034162B2 (fr) * 1971-10-29 1975-11-06
JPS5540269A (en) * 1978-09-16 1980-03-21 Suzuki Motor Co Ltd Manufacturing method of tappet for internal combustion engine by press
JPH0536006U (ja) * 1991-10-14 1993-05-18 フジオーゼツクス株式会社 タペツト

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034162B2 (fr) * 1971-10-29 1975-11-06
JPS5540269A (en) * 1978-09-16 1980-03-21 Suzuki Motor Co Ltd Manufacturing method of tappet for internal combustion engine by press
JPH0536006U (ja) * 1991-10-14 1993-05-18 フジオーゼツクス株式会社 タペツト

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HATSUMEI KYOKAI KOKAIGIHO, No. 86-11568 (NISSAN MOTOR CO., LTD.), 20 August 1986. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712655A1 (de) * 1997-03-26 1998-10-01 Schaeffler Waelzlager Ohg Mechanischer Ventilstößel für eine Brennkraftmaschine
DE10106983A1 (de) * 2001-02-15 2002-08-29 Ina Schaeffler Kg Stößel
US6684838B2 (en) 2001-02-15 2004-02-03 Ina-Schaeffler Kg Tappet

Similar Documents

Publication Publication Date Title
US7062852B2 (en) Rocker arm
US6131826A (en) Valve with combined valve seat body and perforated injection disk
US7159552B2 (en) Cup tappet for an internal combustion engine
EP0509541B1 (fr) Dispositif de commande pour l'entraînement direct d'une soupape d'un moteur à combustion interne
JPH07299529A (ja) 位置決め形状
US20020074867A1 (en) Yoke of electric rotating machine and method of manufacturing same
US20050229980A1 (en) Method of setting the ball travel of a valve-lash-adjusting element
WO1995000749A1 (fr) Poussoir de soupape a action directe destine aux moteurs a combustion interne
JPH0321725B2 (fr)
US20230420205A1 (en) Relay
JP4627116B2 (ja) ソレノイドバルブ
JP3582977B2 (ja) ロッカーアームの製造方法
US20040240758A1 (en) Bearing element
US7263774B2 (en) Plain bearing shell and method for producing a holding projection on a plain bearing shell
JP2010526958A (ja) 内燃機関のロッカアーム
US5706772A (en) Tappet in an internal combustion engine and a method of manufacturing the tappet
JP2001280105A (ja) 内燃機関用薄肉バルブリフターの製造方法
JPH05288015A (ja) ローラタペット
JP3932683B2 (ja) 電磁弁の固定コア及び可動コアの組付け方法及びその組付装置
EP0841472B1 (fr) Poussoir de soupape pour moteur à combustion interne et méthode de fabrication
JPS6347327Y2 (fr)
JPH0828214A (ja) 内燃機関の動弁機構用タペット及びその製造方法
JPS62197608A (ja) 内燃機関用の油圧式弁スキマ補償部材のための内部部材
JP2000227009A (ja) バルブリフタおよびその製造方法
JPH10220626A (ja) ソレノイド式移動機構及びその製造方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): DE FR GB

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase