JP2010001884A - Sliding lifter and its manufacturing method - Google Patents

Sliding lifter and its manufacturing method Download PDF

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JP2010001884A
JP2010001884A JP2008317980A JP2008317980A JP2010001884A JP 2010001884 A JP2010001884 A JP 2010001884A JP 2008317980 A JP2008317980 A JP 2008317980A JP 2008317980 A JP2008317980 A JP 2008317980A JP 2010001884 A JP2010001884 A JP 2010001884A
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lifter
sliding
protrusion
axial direction
end portion
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JP5156610B2 (en
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Kazuchika Kawahara
和周 川原
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Otics Corp
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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
    • F01L1/14—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
    • F01L2305/00—Valve arrangements comprising rollers
    • 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
    • F01L2307/00—Preventing the rotation of tappets

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding lifter and its manufacturing method, easy in manufacture, by easily improving processing accuracy in an outer peripheral surface, even when having a rotation preventive projection. <P>SOLUTION: This sliding lifter 1 has a cross-sectional annular ring shape, and slides its outer peripheral surface 110 to a sliding port 31A arranged in an engine. The sliding lifter 1 is formed by orthogonally supporting a freely rotatable roller 2 in the axial direction between mutual support parts 12 formed in a pair in mutually opposed positions in one end part 101 in its axial direction. The rotation preventive projection 13 for preventing rotation of the sliding lifter 1 by engine with a rotation preventive groove 32 formed in the axial direction of the sliding port 31A, is formed in a part in the peripheral direction unformed with a pair of support parts 12 in the one end part 101 in the axial direction of the sliding lifter 1. The rotation preventive projection 13 is composed of a projection part 131 projecting outside the one end part 101 in the axial direction, and an engaging end part 132 projecting outside in the radial direction by bending to the projection part 131. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、断面円環形状を有し、その外周面をエンジンに設けた摺動口に対して摺動させるよう構成した摺動用リフタ及びその製造方法に関する。   The present invention relates to a sliding lifter having an annular cross-section and configured to slide an outer peripheral surface of a sliding port provided in an engine, and a manufacturing method thereof.

レシプロエンジンにおいては、バルブを開閉させる動弁機構、燃料を加圧してインジェクタへ供給する燃料ポンプ等において、エンジンのシリンダヘッドに設けた摺動口に対して往復摺動する摺動用リフタが用いられている。
例えば、特許文献１のバルブリフタ及び動弁機構においては、バルブリフタ頂部にローラを回転可能に軸支し、ローラの外周面上部をカムと当接させ、カムの回転に伴ってローラを従動回転させながら、バルブリフタを往復動させることが開示されている。これにより、十分な低フリクション化を図り、カム摺接面やバルブ押付面の耐摩耗性を高めている。 In a reciprocating engine, a sliding lifter that reciprocates with respect to a sliding port provided in a cylinder head of an engine is used in a valve operating mechanism that opens and closes a valve, a fuel pump that pressurizes fuel and supplies the fuel to an injector, and the like. ing.
For example, in the valve lifter and valve mechanism of Patent Document 1, a roller is rotatably supported on the valve lifter top, the outer peripheral surface of the roller is brought into contact with the cam, and the roller is driven to rotate as the cam rotates. It is disclosed that the valve lifter is reciprocated. As a result, the friction is sufficiently reduced, and the wear resistance of the cam sliding contact surface and the valve pressing surface is enhanced.

また、特許文献１においては、バルブリフタとシリンダヘッドとの間に、バルブリフタがその中心線の周りに回るのを止める回り止め構造を設けることが開示されている。この回止め構造は、バルブリフタの側壁部に、シリンダヘッドのリフタガイド穴に設けた凹溝に係合する凸部を設けることによって形成されている。   Further, Patent Document 1 discloses that a rotation prevention structure is provided between the valve lifter and the cylinder head to stop the valve lifter from turning around its center line. This anti-rotation structure is formed by providing a convex portion that engages with a concave groove provided in a lifter guide hole of the cylinder head on the side wall portion of the valve lifter.

しかしながら、上記バルブリフタにおいて、上記凸部は、側壁部の外周に直接形成している。そのため、このバルブリフタを製造するときには、凸部を形成するために、冷間鍛造等を行う金型を特殊形状にする必要がある。その結果、金型が複雑になり、その寿命を向上させることが困難である。
また、バルブリフタがリフタガイド穴を摺動する側壁部の外周面は、研磨加工等の仕上げ加工を行って表面の加工精度を高くする必要がある。この仕上げ加工を行う際、外周面に凸部が直接形成されていると、凸部の形成部位において全周の研磨等を行うことができず、バルブリフタの製造を簡単にするためには十分ではない。 However, in the valve lifter, the convex portion is formed directly on the outer periphery of the side wall portion. Therefore, when manufacturing this valve lifter, in order to form a convex part, it is necessary to make the metal mold | die which performs cold forging etc. into a special shape. As a result, the mold becomes complicated and it is difficult to improve its life.
Further, the outer peripheral surface of the side wall portion on which the valve lifter slides on the lifter guide hole needs to be subjected to a finishing process such as a polishing process to increase the surface processing accuracy. When this finishing process is performed, if the convex portion is directly formed on the outer peripheral surface, it is not possible to polish the entire circumference at the portion where the convex portion is formed, which is not enough to simplify the manufacture of the valve lifter. Absent.

特開２００１−３２９８０９号公報JP 2001-329809 A

本発明は、かかる従来の問題点に鑑みてなされたもので、回止め突起を有していても、外周面の加工精度を容易に向上させることができると共に、製造を簡単にすることができる摺動用リフタ及びその製造方法を提供しようとするものである。   The present invention has been made in view of such conventional problems, and even if it has a rotation-preventing protrusion, it is possible to easily improve the processing accuracy of the outer peripheral surface and to simplify the manufacture. An object of the present invention is to provide a sliding lifter and a method for manufacturing the same.

第１の発明は、断面円環形状を有し、その外周面をエンジンに設けた摺動口に対して摺動させるよう構成した摺動用リフタであって、
該摺動用リフタは、その軸方向一端部における互いに対向する位置に一対に形成した支持部同士の間に、回転自在なローラを軸方向に直交して支持してなり、
上記軸方向一端部において、上記一対の支持部を形成していない周方向部位には、上記摺動口の軸方向に沿って形成した回止め溝に係合して、当該摺動用リフタの回り止めを行うための回止め突起が形成してあり、
該回止め突起は、上記軸方向一端部の外方へ突出する突出部と、該突出部に対して屈曲して径方向外方へ突出する係合端部とからなることを特徴とする摺動用リフタにある（請求項１）。 A first invention is a sliding lifter configured to have an annular cross section and to slide an outer peripheral surface thereof with respect to a sliding port provided in an engine,
The sliding lifter is configured to support a rotatable roller perpendicular to the axial direction between a pair of support portions formed at opposite positions in one axial end portion thereof.
At one end portion in the axial direction, the circumferential portion where the pair of support portions are not formed is engaged with a rotation stop groove formed along the axial direction of the sliding port, A rotation projection for stopping is formed,
The anti-rotation protrusion includes a protrusion that protrudes outward from one end in the axial direction and an engagement end that is bent with respect to the protrusion and protrudes outward in the radial direction. It exists in a moving lifter (Claim 1).

本発明の摺動用リフタにおいては、回止め突起の形成箇所及び形成状態に工夫を行っている。
本発明の摺動用リフタは、ローラを支持する一対の支持部を形成した軸方向一端部において、一対の支持部を形成した周方向部位とは異なる部位に、回止め突起を形成してなる。この回止め突起は、軸方向一端部の外方へ突出する突出部と、突出部に対して屈曲して径方向外方へ突出する係合端部とからなる。 In the sliding lifter according to the present invention, the formation position and the formation state of the anti-rotation protrusion are devised.
The sliding lifter of the present invention is formed by forming a rotation protrusion at a portion different from the circumferential portion where the pair of support portions are formed at one axial end portion where the pair of support portions supporting the roller is formed. The anti-rotation projection is composed of a projecting portion projecting outward from one end portion in the axial direction, and an engaging end portion that is bent with respect to the projecting portion and projects outward in the radial direction.

これにより、摺動用リフタにおいては、断面円環形状を有する本体部分の外周面には、回止め突起が直接形成されていない。そのため、摺動用リフタを製造する金型の構造を簡単にすることができ、その寿命を向上させることができる。
また、摺動用リフタを製造する際に、本体部分の外周面に回止め突起が存在しないことにより、研磨加工等の仕上げ加工を行う際に、本体部分の外周面の全周を一括して簡単に加工することができる。これにより、摺動用リフタの外周面の加工精度を容易に向上させることができる。 As a result, in the sliding lifter, the rotation projection is not directly formed on the outer peripheral surface of the main body portion having an annular cross section. Therefore, the structure of the mold for manufacturing the sliding lifter can be simplified, and the life can be improved.
In addition, when manufacturing a lifter for sliding, the entire outer periphery of the main body part can be easily and collectively removed when finishing such as polishing because there are no rotation projections on the outer peripheral surface of the main body part. Can be processed. Thereby, the processing precision of the outer peripheral surface of a sliding lifter can be improved easily.

それ故、本発明によれば、回止め突起を有していても、外周面の加工精度を容易に向上させることができると共に、製造を簡単にすることができる摺動用リフタを提供することができる。   Therefore, according to the present invention, it is possible to provide a sliding lifter that can easily improve the processing accuracy of the outer peripheral surface and can be easily manufactured even if it has a locking projection. it can.

第２の発明は、断面円環形状の本体部を有し、該本体部の外周面をエンジンに設けた摺動口に対して摺動させるよう構成した摺動用リフタを製造する方法であって、
断面円環形状の素材を成形する鍛造工程と、
上記素材の軸方向一端部に対して打抜き等の切除加工を行って、当該素材に、互いに対向する一対の支持部と、軸方向一端部の外方へ突出する折曲用突出部とを形成する切除工程と、
上記折曲用突出部に対して折曲加工を行って、該折曲用突出部から、上記素材の軸方向一端部の外方へ突出する突出部と、該突出部の先端部から径方向外方へ突出する係合端部とを形成する折曲工程とを含むことを特徴とする摺動用リフタの製造方法にある（請求項５）。 A second invention is a method of manufacturing a sliding lifter having a main body having an annular cross section and configured to slide the outer peripheral surface of the main body against a sliding port provided in the engine. ,
A forging process for forming an annular cross-section material;
Cutting one end of the material in the axial direction, such as punching, forms a pair of support portions facing each other and a bending protrusion protruding outward from the one end in the axial direction. Excision process to
A bending process is performed on the bending protrusion, and the protrusion protrudes outward from one end in the axial direction of the material from the bending protrusion, and the radial direction from the tip of the protrusion. And a bending step of forming an engaging end projecting outward. A manufacturing method of a sliding lifter according to claim 5.

本発明の摺動用リフタの製造方法は、一対の支持部を形成した軸方向一端部において上記回止め突起を形成してなる摺動用リフタの製造に適した方法である。
本発明の製造方法においては、鍛造工程として、断面円環形状の素材を成形する。この素材は、その外周面を、突起等の特殊形状がない平坦面に形成することができる。そのため、鍛造工程において用いる金型の構造を簡単にすることができ、その寿命を向上させることができる。 The manufacturing method of the sliding lifter according to the present invention is a method suitable for manufacturing the sliding lifter in which the above-mentioned rotation stop projection is formed at one end in the axial direction where a pair of support portions are formed.
In the manufacturing method of the present invention, a material having an annular cross section is formed as the forging step. The outer peripheral surface of this material can be formed on a flat surface having no special shape such as a protrusion. Therefore, the structure of the mold used in the forging process can be simplified, and the life can be improved.

次いで、切除工程として、素材の軸方向一端部に対して打抜き等の切除加工を行って、素材に、互いに対向する一対の支持部と、軸方向一端部の外方へ突出する折曲用突出部とを形成する。このとき、折曲用突出部は、素材の外周面から径方向外方へほとんど突出しない形状に形成することができる。   Next, as a cutting step, a cutting process such as punching is performed on one end of the material in the axial direction, and the material is paired with a pair of support portions facing each other, and a protrusion for bending protruding outward of the one end in the axial direction. Forming part. At this time, the bending protrusion can be formed in a shape that hardly protrudes radially outward from the outer peripheral surface of the material.

その後、折曲工程として、折曲用突出部に対して折曲加工を行い、折曲用突出部から、素材の軸方向一端部の外方へ突出する突出部と、突出部の先端部から径方向外方へ突出する係合端部とを形成する。これにより、本発明の製造方法においては、突出部と係合端部とからなる回止め突起を、断面円環形状を有する本体部分の軸方向一端部の外方及び径方向外方に形成してなる摺動用リフタを製造することができる。
そのため、折曲工程の後に、摺動用リフタの本体部分の外周面に研磨加工等の仕上げ加工を行う際には、本体部分の外周面の全周を一括して簡単に加工することができる。これにより、摺動用リフタの外周面の加工精度を容易に向上させることができる。 After that, as a bending process, bending is performed on the bending protrusion, and from the bending protrusion, the protrusion protruding outward from one end in the axial direction of the material, and the tip of the protrusion And an engaging end projecting radially outward. As a result, in the manufacturing method of the present invention, the anti-rotation projections composed of the projecting portions and the engaging end portions are formed on the outer side and the outer side in the radial direction of the one axial end portion of the main body portion having an annular cross section. Thus, a sliding lifter can be manufactured.
Therefore, when the finishing process such as polishing is performed on the outer peripheral surface of the main body portion of the sliding lifter after the bending step, the entire outer periphery of the main body portion can be easily processed in a lump. Thereby, the processing precision of the outer peripheral surface of a sliding lifter can be improved easily.

それ故、本発明によれば、回止め突起を有していても、外周面の加工精度を容易に向上させることができると共に、製造を簡単にすることができる摺動用リフタの製造方法を提供することができる。   Therefore, according to the present invention, there is provided a method for manufacturing a sliding lifter that can easily improve the processing accuracy of the outer peripheral surface and can be easily manufactured even if it has a locking protrusion. can do.

上述した第１、第２の発明における好ましい実施の形態につき説明する。
第１の発明において、上記突出部の周方向幅は、上記係合端部の周方向幅よりも小さいことが好ましい（請求項２）。
この場合には、突出部に対して係合端部を折り曲げて形成することができ、突出部の曲げ剛性が低いことより、この折曲加工の精度を向上させることができる。そのため、係合端部の寸法精度を向上させることができる。 A preferred embodiment in the first and second inventions described above will be described.
1st invention WHEREIN: It is preferable that the circumferential direction width | variety of the said protrusion part is smaller than the circumferential direction width | variety of the said engaging end part (Claim 2).
In this case, the engagement end portion can be bent with respect to the protruding portion, and the bending rigidity of the protruding portion is low, so that the accuracy of the bending process can be improved. Therefore, the dimensional accuracy of the engaging end can be improved.

また、上記摺動用リフタは、上記エンジンにおける動弁機構に用いるバルブリフタとすることができる（請求項３）。
この場合には、回止め突起を有するバルブリフタの外周面の加工精度を容易に向上させることができ、その製造を簡単にすることができる。 Further, the sliding lifter can be a valve lifter used for a valve operating mechanism in the engine.
In this case, it is possible to easily improve the processing accuracy of the outer peripheral surface of the valve lifter having the rotation-stopping projection, and the manufacture thereof can be simplified.

また、上記摺動用リフタは、上記エンジンの燃料ポンプに用いる燃料用リフタとすることもできる（請求項４）。
この場合には、回止め突起を有する燃料用リフタの外周面の加工精度を容易に向上させることができ、その製造を簡単にすることができる。 The sliding lifter may be a fuel lifter used for a fuel pump of the engine.
In this case, it is possible to easily improve the processing accuracy of the outer peripheral surface of the fuel lifter having the anti-rotation projection, and the manufacture thereof can be simplified.

第２の発明において、上記切除工程においては、上記折曲用突出部は、基端側部分と、該基端側部分よりも周方向幅が大きい先端側部分とからなる形状に形成し、上記折曲工程においては、上記基端側部分から上記突出部を形成すると共に、上記先端側部分から上記係合端部を形成することが好ましい（請求項６）。
この場合には、折曲用突出部の基端側部分の曲げ剛性が低いことより、折曲工程における基端側部分の折曲加工の精度を向上させることができる。そのため、折曲工程において形成する係合端部の寸法精度を向上させることができる。 2nd invention WHEREIN: In the said cutting process, the said protrusion part for bending is formed in the shape which consists of a base end side part and the front end side part whose circumferential direction width | variety is larger than this base end side part, In the bending step, it is preferable that the protruding portion is formed from the base end portion and the engaging end portion is formed from the tip end portion.
In this case, since the bending rigidity of the base end side portion of the bending protrusion is low, the accuracy of bending of the base end side portion in the bending step can be improved. Therefore, it is possible to improve the dimensional accuracy of the engagement end portion formed in the bending step.

以下に、本発明の摺動用リフタ及びその製造方法にかかる実施例につき、図面を参照して説明する。
（実施例１）
本例の摺動用リフタ１は、図１、図２に示すごとく、断面円環形状を有し、その外周面１１０をエンジンに設けた摺動口３１Ａに対して摺動させるよう構成してある。摺動用リフタ１は、その軸方向一端部１０１における互いに対向する位置に一対に形成した支持部１２同士の間に、回転自在なローラ２を軸方向に直交して支持してなる。摺動用リフタ１の軸方向一端部１０１において、一対の支持部１２を形成していない周方向部位には、摺動口３１Ａの軸方向に沿って形成した回止め溝３２に係合して、摺動用リフタ１の回り止めを行うための回止め突起１３が形成してある。この回止め突起１３は、軸方向一端部１０１の外方へ突出する突出部１３１と、突出部１３１に対して屈曲して径方向外方へ突出する係合端部１３２とからなる。 Hereinafter, embodiments of a sliding lifter and a manufacturing method thereof according to the present invention will be described with reference to the drawings.
Example 1
As shown in FIGS. 1 and 2, the sliding lifter 1 of this example has an annular cross section and is configured to slide its outer peripheral surface 110 with respect to a sliding port 31A provided in the engine. . The sliding lifter 1 supports a rotatable roller 2 orthogonal to the axial direction between a pair of support portions 12 formed at positions facing each other at one axial end portion 101 thereof. At one end 101 in the axial direction of the sliding lifter 1, the circumferential portion where the pair of support portions 12 are not formed is engaged with a rotation stop groove 32 formed along the axial direction of the sliding port 31 </ b> A, An anti-rotation projection 13 is formed to prevent the sliding lifter 1 from rotating. The anti-rotation projection 13 includes a protruding portion 131 that protrudes outward from the axial one end portion 101 and an engaging end portion 132 that is bent with respect to the protruding portion 131 and protrudes radially outward.

以下に、本例の摺動用リフタ１及びその製造方法につき、図１〜図５を参照して詳説する。
図１に示すごとく、本例の摺動用リフタ１は、レシプロエンジンにおける動弁機構６Ａに用いるバルブリフタ１Ａである。動弁機構６Ａにおいて、バルブリフタ１Ａは、レシプロエンジンのカムシャフト４に設けた動弁用カム４１の回転を受けてローラ２を従動回転させながら、レシプロエンジンのシリンダヘッド３に設けた摺動口３１Ａ内を摺動するよう構成してある。バルブリフタ１Ａは、レシプロエンジンにおけるバルブ５のステム先端部５２に当接して、吸排気口（吸気口又は排気口）３３を開閉可能に配置したバルブ５を開閉させるよう摺動口３１Ａ内に往復摺動可能に配置してある。 Hereinafter, the sliding lifter 1 of this example and the manufacturing method thereof will be described in detail with reference to FIGS.
As shown in FIG. 1, the sliding lifter 1 of this example is a valve lifter 1A used for a valve operating mechanism 6A in a reciprocating engine. In the valve operating mechanism 6A, the valve lifter 1A receives a rotation of the valve operating cam 41 provided on the camshaft 4 of the reciprocating engine and rotates the roller 2 following the rotation, while the sliding opening 31A provided on the cylinder head 3 of the reciprocating engine. It is configured to slide inside. The valve lifter 1 </ b> A abuts on the stem tip 52 of the valve 5 in the reciprocating engine, and reciprocally slides in the sliding port 31 </ b> A so as to open and close the valve 5 in which the intake / exhaust port (intake port or exhaust port) 33 is arranged to be opened and closed. It is arranged to be movable.

同図に示すごとく、バルブリフタ１Ａは、断面円環形状の本体部（本体部分）１１の内周側において、板形状の当接部（底板部分）１１１を形成してなる。そして、当接部１１１の全周には、軸方向の両側に向けて断面円環形状の本体部１１が形成されている。また、当接部１１１は、バルブ５のステム先端部５２に当接するよう構成されている。本例の一対の支持部１２及び回止め突起１３を形成した軸方向一端部１０１は、バルブリフタ１Ａにおいてバルブ５の配置位置（下側）とは反対側の上側に位置する。
また、バルブ５のステム部５１の外周にはリテーナ５３が固定してあり、リテーナ５３とシリンダヘッド３との間には、バルブリフタ１Ａを動弁用カム４１の方向へ付勢するためのスプリング５４が配置してある。 As shown in the figure, the valve lifter 1A is formed with a plate-shaped contact portion (bottom plate portion) 111 on the inner peripheral side of the main body portion (main body portion) 11 having an annular cross section. A main body portion 11 having an annular cross section is formed on the entire circumference of the contact portion 111 toward both sides in the axial direction. Further, the abutting portion 111 is configured to abut on the stem tip portion 52 of the valve 5. The axial direction one end portion 101 in which the pair of support portions 12 and the rotation stop projection 13 of the present example are formed is located on the upper side opposite to the arrangement position (lower side) of the valve 5 in the valve lifter 1A.
A retainer 53 is fixed to the outer periphery of the stem portion 51 of the valve 5, and a spring 54 for urging the valve lifter 1 </ b> A in the direction of the valve cam 41 between the retainer 53 and the cylinder head 3. Is arranged.

次に、本例のバルブリフタ１Ａの製造方法につき説明する。
本例の製造方法においては、図３に示すごとく、鍛造工程として、冷間鍛造を行い、断面円環形状の本体部１１の内周側に、板形状の当接部１１１を形成してなる素材（鍛造品）１０を成形する。この素材１０は、その外周面１１０を、突起等の特殊形状がない平坦面に形成することができる。そのため、鍛造工程において用いる金型の構造を簡単にすることができ、その寿命を向上させることができる。 Next, a manufacturing method of the valve lifter 1A of this example will be described.
In the manufacturing method of this example, as shown in FIG. 3, as a forging process, cold forging is performed, and a plate-shaped contact portion 111 is formed on the inner peripheral side of the main body portion 11 having an annular cross section. A material (forged product) 10 is formed. The material 10 can have an outer peripheral surface 110 formed on a flat surface having no special shape such as a protrusion. Therefore, the structure of the mold used in the forging process can be simplified, and the life can be improved.

次いで、図４に示すごとく、切除工程として、素材１０の軸方向一端部１０１に対して切除加工としての打抜き加工を行い、素材１０に、軸方向一端部１０１において互いに対向する一対の支持部１２と、軸方向一端部１０１の外方へ突出する折曲用突出部１３０とを形成する。このとき、折曲用突出部１３０は、素材１０の外周面１１０から径方向外方へほとんど突出しない形状に形成することができる。
次いで、図５に示すごとく、折曲工程として、折曲用突出部１３０に対して折曲加工を行い、折曲用突出部１３０から、素材１０の軸方向一端部１０１の外方へ突出する突出部１３１と、突出部１３１の先端部から径方向外方へ突出する係合端部１３２とを形成する。 Next, as shown in FIG. 4, as a cutting process, a punching process as a cutting process is performed on the axial one end portion 101 of the material 10, and the pair of support portions 12 facing each other at the axial one end portion 101 is performed. And a bending protrusion 130 that protrudes outward from the axial one end 101. At this time, the bending protrusion 130 can be formed in a shape that hardly protrudes radially outward from the outer peripheral surface 110 of the material 10.
Next, as shown in FIG. 5, as the bending process, the bending protrusion 130 is bent, and the bending protrusion 130 protrudes outward from the axial end portion 101 of the material 10. A protrusion 131 and an engagement end 132 that protrudes radially outward from the tip of the protrusion 131 are formed.

次いで、穴明工程として、一対の突出部１３１を貫通して、ローラ２の軸部２１を挿通配置するための貫通穴１２１を形成し、熱処理工程として、バルブリフタ１Ａに熱処理を行い、仕上工程として、バルブリフタ１Ａの本体部１１の外周面１１０に研磨加工を行う。こうして、突出部１３１と係合端部１３２とからなる回止め突起１３を、断面円環形状を有する本体部１１の軸方向一端部１０１の外方及び径方向外方に突出形成してなるバルブリフタ１Ａを製造することができる。
本例において、上記仕上工程を行う際には、バルブリフタ１Ａの本体部１１の外周面１１０の全周を一括して簡単に加工することができる（図５参照）。これにより、バルブリフタ１Ａの外周面１１０の加工精度を容易に向上させることができる。 Next, as a drilling step, a through hole 121 is formed through the pair of protrusions 131 and the shaft portion 21 of the roller 2 is inserted and disposed. As a heat treatment step, the valve lifter 1A is heat treated, and a finishing step is performed. Then, polishing is performed on the outer peripheral surface 110 of the main body 11 of the valve lifter 1A. In this way, the valve lifter formed by forming the locking protrusion 13 including the protruding portion 131 and the engaging end portion 132 outwardly and radially outwardly of the axial one end portion 101 of the main body portion 11 having an annular cross section. 1A can be manufactured.
In this example, when the finishing process is performed, the entire circumference of the outer peripheral surface 110 of the main body 11 of the valve lifter 1A can be easily processed in a lump (see FIG. 5). Thereby, the processing precision of the outer peripheral surface 110 of 1 A of valve lifters can be improved easily.

それ故、本例のバルブリフタ１Ａ及びその製造方法によれば、回止め突起１３を有していても、外周面１１０の加工精度を容易に向上させることができると共に、製造を簡単にすることができる。   Therefore, according to the valve lifter 1A of the present example and the manufacturing method thereof, the processing accuracy of the outer peripheral surface 110 can be easily improved and the manufacturing can be simplified even when the rotation protrusion 13 is provided. it can.

（実施例２）
本例は、図６に示すごとく、摺動用リフタ１を、レシプロエンジンの燃料ポンプ６Ｂに用いる燃料用リフタ１Ｂとして用いた例である。
本例の燃料ポンプ６Ｂは、レシプロエンジンのカムシャフト４に設けた燃料用カム４２の回転に同調して、燃料タンク６１から供給される燃料Ｆを加圧して、この加圧した燃料Ｆをインジェクタ６２へ供給するよう構成されている。燃料ポンプ６Ｂにおいて、燃料用リフタ１Ｂは、燃料用カム４２の回転を受けてローラ２を従動回転させながら、レシプロエンジンのシリンダヘッド３に設けた摺動口３１Ｂ内を摺動するよう構成してある。 (Example 2)
In this example, as shown in FIG. 6, the sliding lifter 1 is used as a fuel lifter 1B used in a fuel pump 6B of a reciprocating engine.
The fuel pump 6B of this example pressurizes the fuel F supplied from the fuel tank 61 in synchronization with the rotation of the fuel cam 42 provided on the camshaft 4 of the reciprocating engine, and the pressurized fuel F is injected into the injector. 62 is provided. In the fuel pump 6B, the fuel lifter 1B is configured to slide in the sliding port 31B provided in the cylinder head 3 of the reciprocating engine while the roller 2 is driven and rotated by the rotation of the fuel cam 42. is there.

燃料用リフタ１Ｂは、シリンダヘッド３に摺動可能に配置したプランジャ６３の一端部に当接して、プランジャ６３を摺動させ、プランジャ６３の他端部によって、シリンダヘッド３に形成した加圧室３３内の燃料Ｆを加圧するよう構成されている。
また、プランジャ６３の外周にはリテーナ６３１が固定してあり、リテーナ６３１とシリンダヘッド３との間には、燃料用リフタ１Ｂを燃料用カム４２の方向へ付勢するためのスプリング６３２が配置してある。 The fuel lifter 1 </ b> B abuts on one end portion of a plunger 63 that is slidably disposed on the cylinder head 3, slides the plunger 63, and a pressure chamber formed in the cylinder head 3 by the other end portion of the plunger 63. The fuel F in 33 is pressurized.
A retainer 631 is fixed to the outer periphery of the plunger 63, and a spring 632 for urging the fuel lifter 1 </ b> B in the direction of the fuel cam 42 is disposed between the retainer 631 and the cylinder head 3. It is.

加圧室３３は、燃料タンク６１とインジェクタ６２とを連通するようシリンダヘッド３に形成した燃料供給通路３４の途中に形成してある。燃料供給通路３４において、燃料タンク６１と加圧室３３との間、加圧室３３とインジェクタ６２との間には、燃料Ｆの逆流を防止する逆止弁３５が設けてある。
また、加圧室３３と、燃料タンク６１と加圧室３３との間の燃料供給通路３４との間には、ＥＣＵ（電子制御ユニット）によって制御するリリーフバルブ３６が接続されており、加圧室３３からインジェクタ６２へ供給する燃料量を調整可能になっている。
なお、インジェクタ６２は、シリンダー内又は吸気口へ燃料Ｆを噴射させるよう構成してある。 The pressurizing chamber 33 is formed in the middle of the fuel supply passage 34 formed in the cylinder head 3 so as to communicate the fuel tank 61 and the injector 62. In the fuel supply passage 34, a check valve 35 for preventing the backflow of the fuel F is provided between the fuel tank 61 and the pressurizing chamber 33 and between the pressurizing chamber 33 and the injector 62.
A relief valve 36 controlled by an ECU (Electronic Control Unit) is connected between the pressurizing chamber 33 and the fuel supply passage 34 between the fuel tank 61 and the pressurizing chamber 33. The amount of fuel supplied from the chamber 33 to the injector 62 can be adjusted.
The injector 62 is configured to inject fuel F into the cylinder or into the intake port.

本例の燃料用リフタ１Ｂは、上記実施例１に示したバルブリフタ１Ａと同様の構造を有しており、上記実施例１と同様の製造方法によって製造することができる。
それ故、本例の燃料用リフタ１Ｂ及びその製造方法によっても、上記実施例１と同様の作用効果を得ることができる。 The fuel lifter 1B of this example has the same structure as the valve lifter 1A shown in the first embodiment, and can be manufactured by the same manufacturing method as in the first embodiment.
Therefore, the same effects as those of the first embodiment can also be obtained by the fuel lifter 1B of the present example and the manufacturing method thereof.

（実施例３）
本例は、図７、図８に示すごとく、回止め突起１３の形状に工夫を行った例である。
本例の回止め突起１３は、軸方向一端部１０１の外方へ突出する突出部１３１の周方向幅が、突出部１３１に対して屈曲して径方向外方へ突出する係合端部１３２の周方向幅よりも小さくなっている。本例の回止め突起１３は、上記実施例１に示したレシプロエンジンにおける動弁機構６Ａに用いるバルブリフタ１Ａに採用した。これに対し、本例の回止め突起１３は、上記実施例２に示したレシプロエンジンの燃料ポンプ６Ｂに用いる燃料用リフタ１Ｂに採用することもできる。 (Example 3)
In this example, as shown in FIGS. 7 and 8, the shape of the rotation projection 13 is devised.
The locking protrusion 13 of the present example has an engagement end portion 132 in which the circumferential width of the protruding portion 131 protruding outward from the axial one end portion 101 is bent with respect to the protruding portion 131 and protrudes radially outward. It is smaller than the circumferential width. The anti-rotation protrusion 13 of this example is employed in the valve lifter 1A used in the valve mechanism 6A in the reciprocating engine shown in the first embodiment. On the other hand, the anti-rotation protrusion 13 of this example can also be employed in the fuel lifter 1B used in the fuel pump 6B of the reciprocating engine shown in the second embodiment.

また、本例のバルブリフタ１Ａの製造方法の切除工程においては、折曲用突出部１３０は、基端側部分１３１Ａと、基端側部分１３１Ａよりも周方向幅が大きい先端側部分１３２Ａとからなる形状に形成することができる。そして、本例の折曲工程においては、基端側部分１３１Ａから突出部１３１を形成すると共に、先端側部分１３２Ａから係合端部１３２を形成することができる。
本例においては、折曲用突出部１３０の基端側部分１３１Ａの曲げ剛性が低いことより、折曲工程における基端側部分１３１Ａの折曲加工の精度を向上させることができる。そのため、折曲工程において形成する係合端部１３２の寸法精度を向上させることができる。本例においても、その他の構成は上記実施例１と同様であり、上記実施例１と同様の作用効果を得ることができる。 Further, in the excision step of the manufacturing method of the valve lifter 1A of the present example, the bending protrusion 130 is composed of a proximal end portion 131A and a distal end portion 132A having a larger circumferential width than the proximal end portion 131A. It can be formed into a shape. In the bending process of this example, the protruding portion 131 can be formed from the proximal end portion 131A, and the engaging end portion 132 can be formed from the distal end side portion 132A.
In this example, since the bending rigidity of the proximal end portion 131A of the bending protrusion 130 is low, the accuracy of bending of the proximal end portion 131A in the bending step can be improved. Therefore, the dimensional accuracy of the engagement end portion 132 formed in the bending process can be improved. Also in this example, other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment can be obtained.

実施例１における、摺動用リフタをバルブリフタとして用いた場合の動弁機構を示す断面説明図。Sectional explanatory drawing which shows the valve mechanism in the case of using the sliding lifter in Example 1 as a valve lifter. 実施例１における、動弁機構におけるバルブリフタを上方から見た状態で示す説明図。Explanatory drawing which shows the state which looked at the valve lifter in the valve operating mechanism in Example 1 from upper direction. 実施例１における、鍛造工程において成形した素材を示す断面説明図。Sectional explanatory drawing which shows the raw material shape | molded in the forge process in Example 1. FIG. 実施例１における、切除工程において成形した素材を示す断面説明図。Sectional explanatory drawing which shows the raw material shape | molded in the cutting process in Example 1. FIG. 実施例１における、折曲工程において成形した素材を示す断面説明図。Sectional explanatory drawing which shows the raw material shape | molded in the bending process in Example 1. FIG. 実施例２における、摺動用リフタを燃料用リフタとして用いた場合の動弁機構を示す断面説明図。Sectional explanatory drawing which shows the valve mechanism in the case of using the sliding lifter in Example 2 as a fuel lifter. 実施例３における、動弁機構におけるバルブリフタを上方から見た状態で示す説明図。Explanatory drawing which shows the state which looked at the valve lifter in the valve operating mechanism in Example 3 from upper direction. 実施例３における、折曲工程において成形した素材を示す断面説明図。Sectional explanatory drawing which shows the raw material shape | molded in the bending process in Example 3. FIG.

符号の説明Explanation of symbols

１ 摺動用リフタ
１Ａ バルブリフタ
１Ｂ 燃料用リフタ
１０ 素材
１０１ 軸方向一端部
１２ 支持部
１３ 回止め突起
１３０ 折曲用突出部
１３１ 突出部
１３２ 係合端部
２ ローラ
３ シリンダヘッド
３１Ａ、Ｂ 摺動口
３２ 回止め溝
４ カムシャフト
４１ 動弁用カム
４２ 燃料用カム
５ バルブ
６Ａ 動弁機構
６Ｂ 燃料ポンプ DESCRIPTION OF SYMBOLS 1 Sliding lifter 1A Valve lifter 1B Fuel lifter 10 Material 101 Axial direction end part 12 Support part 13 Anti-rotation protrusion 130 Bending protrusion part 131 Protruding part 132 Engaging end part 2 Roller 3 Cylinder head 31A, B Sliding port 32 Stop groove 4 Camshaft 41 Valve cam 42 Fuel cam 5 Valve 6A Valve mechanism 6B Fuel pump

Claims (6)

断面円環形状を有し、その外周面をエンジンに設けた摺動口に対して摺動させるよう構成した摺動用リフタであって、
該摺動用リフタは、その軸方向一端部における互いに対向する位置に一対に形成した支持部同士の間に、回転自在なローラを軸方向に直交して支持してなり、
上記軸方向一端部において、上記一対の支持部を形成していない周方向部位には、上記摺動口の軸方向に沿って形成した回止め溝に係合して、当該摺動用リフタの回り止めを行うための回止め突起が形成してあり、
該回止め突起は、上記軸方向一端部の外方へ突出する突出部と、該突出部に対して屈曲して径方向外方へ突出する係合端部とからなることを特徴とする摺動用リフタ。 A sliding lifter that has an annular cross section and is configured to slide its outer peripheral surface against a sliding port provided in the engine,
The sliding lifter is configured to support a rotatable roller perpendicular to the axial direction between a pair of support portions formed at opposite positions in one axial end portion thereof.
At one end portion in the axial direction, the circumferential portion where the pair of support portions are not formed is engaged with a rotation stop groove formed along the axial direction of the sliding port, A rotation projection for stopping is formed,
The anti-rotation protrusion includes a protrusion that protrudes outward from one end in the axial direction and an engagement end that is bent with respect to the protrusion and protrudes outward in the radial direction. Movement lifter. 請求項１において、上記突出部の周方向幅は、上記係合端部の周方向幅よりも小さいことを特徴とする摺動用リフタ。   2. The sliding lifter according to claim 1, wherein a circumferential width of the protruding portion is smaller than a circumferential width of the engaging end portion. 請求項１又は２において、上記摺動用リフタは、上記エンジンにおける動弁機構に用いるバルブリフタであることを特徴とする摺動用リフタ。   3. The sliding lifter according to claim 1, wherein the sliding lifter is a valve lifter used for a valve operating mechanism in the engine. 請求項１又は２において、上記摺動用リフタは、上記エンジンの燃料ポンプに用いる燃料用リフタであることを特徴とする摺動用リフタ。   3. The sliding lifter according to claim 1, wherein the sliding lifter is a fuel lifter used for a fuel pump of the engine. 断面円環形状の本体部を有し、該本体部の外周面をエンジンに設けた摺動口に対して摺動させるよう構成した摺動用リフタを製造する方法であって、
断面円環形状の素材を成形する鍛造工程と、
上記素材の軸方向一端部に対して打抜き等の切除加工を行って、当該素材に、互いに対向する一対の支持部と、軸方向一端部の外方へ突出する折曲用突出部とを形成する切除工程と、
上記折曲用突出部に対して折曲加工を行って、該折曲用突出部から、上記素材の軸方向一端部の外方へ突出する突出部と、該突出部の先端部から径方向外方へ突出する係合端部とを形成する折曲工程とを含むことを特徴とする摺動用リフタの製造方法。 A method of manufacturing a sliding lifter having an annular cross-sectional main body portion and configured to slide the outer peripheral surface of the main body portion with respect to a sliding port provided in the engine,
A forging process for forming an annular cross-section material;
Cutting one end of the material in the axial direction, such as punching, forms a pair of support portions facing each other and a bending protrusion protruding outward from the one end in the axial direction. Excision process to
A bending process is performed on the bending protrusion, and the protrusion protrudes outward from one end in the axial direction of the material from the bending protrusion, and the radial direction from the tip of the protrusion. And a bending step of forming an engaging end portion protruding outward. 請求項５において、上記切除工程においては、上記折曲用突出部は、基端側部分と、該基端側部分よりも周方向幅が大きい先端側部分とからなる形状に形成し、
上記折曲工程においては、上記基端側部分から上記突出部を形成すると共に、上記先端側部分から上記係合端部を形成することを特徴とする摺動用リフタの製造方法。 In claim 5, in the excision step, the protrusion for bending is formed in a shape including a proximal end portion and a distal end portion having a larger circumferential width than the proximal end portion,
In the bending step, the protruding portion is formed from the base end portion, and the engaging end is formed from the tip end portion.
JP2008317980A 2008-05-19 2008-12-15 Sliding lifter and manufacturing method thereof Active JP5156610B2 (en)

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EP2677124A1 (en) 2012-06-20 2013-12-25 Otics Corporation Roller lifter for internal combustion engine
EP3078843A1 (en) 2015-04-10 2016-10-12 Otics Corporation Lifter rotation preventing structure
WO2017196665A1 (en) * 2016-05-07 2017-11-16 Eaton Corporation Anti-rotation feature for followers using an oil gallery insert
JP2019138192A (en) * 2018-02-08 2019-08-22 株式会社オティックス Roller lifter
KR102356712B1 (en) * 2020-07-27 2022-02-07 요크코리아(주) Method of manufacturing roller tappet housing

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JP2011153573A (en) * 2010-01-27 2011-08-11 Ntn Corp Tappet for pump
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EP2677124A1 (en) 2012-06-20 2013-12-25 Otics Corporation Roller lifter for internal combustion engine
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JP2019138192A (en) * 2018-02-08 2019-08-22 株式会社オティックス Roller lifter
KR102356712B1 (en) * 2020-07-27 2022-02-07 요크코리아(주) Method of manufacturing roller tappet housing

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