JPS6145165A - Method of manufacturing plunger for chain tensioner - Google Patents

Method of manufacturing plunger for chain tensioner

Info

Publication number
JPS6145165A
JPS6145165A JP16134084A JP16134084A JPS6145165A JP S6145165 A JPS6145165 A JP S6145165A JP 16134084 A JP16134084 A JP 16134084A JP 16134084 A JP16134084 A JP 16134084A JP S6145165 A JPS6145165 A JP S6145165A
Authority
JP
Japan
Prior art keywords
plunger
pin
rubber
plate
head
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
Application number
JP16134084A
Other languages
Japanese (ja)
Inventor
Akimitsu Tokuyama
徳山 昭光
Kazuo Satake
茶竹 一夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daido Kogyo Co Ltd
Original Assignee
Daido Kogyo 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 Daido Kogyo Co Ltd filed Critical Daido Kogyo Co Ltd
Priority to JP16134084A priority Critical patent/JPS6145165A/en
Publication of JPS6145165A publication Critical patent/JPS6145165A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H7/10Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

PURPOSE:To reduce a working process by adopting a manufacturing method comprising the steps of sticking rubber on a plunger plate, and then fitting a plunger pin thereto. CONSTITUTION:A plunger plate 11 formed by a band steel is subjected to a press to have the outer periphery and a hole of a designated size, and rubber is sticked to the plunger plate to complete a plunger head 13. On the other hand, a plunger pin 12 is formed by cutting a round bar to a designated size, and worked like a cup by cold casting, and at the same time, a small hole 14 is machined at the center of the bottom portion of the plunger pin 12, or a small hole 14 is bored therethrough by twist drill machining. Further, the upper end surface of the plunger pin is cut to a designated length, and the outer periphery thereof is subjected to grinding. After heat treatment and finish grinding, the plunger pin 12 is pressed into the plunger head 13 to complete a plunger 1.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、主として自動車用エンジンのタイミング用
として使用されるチェーンのテンショナー、特に該テン
ショナーのプランジャーの製造方法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a chain tensioner mainly used for timing of an automobile engine, and particularly to a method for manufacturing a plunger of the tensioner.

[従来の技術] チェーンテンショナーは第4図に示すように、プランジ
ャー(1)部とボディ(2)部とで構成され、チェーン
(3)の張り側で、プランジャー(1)の頂部に貼着し
たゴムがチェーン(3)に接し、ボディ(2)に保持し
たプランジャー(1)が摺動・ピストン運動することに
より、チェーン(3)の張り具合を調整している。
[Prior Art] As shown in Fig. 4, a chain tensioner is composed of a plunger (1) part and a body (2) part, and a tension side of the chain (3) is attached to the top of the plunger (1). The attached rubber comes into contact with the chain (3), and the plunger (1) held on the body (2) slides and makes a piston movement, thereby adjusting the tension of the chain (3).

該プランジャー(1)の製造工程を第1図に基づいて説
明するにプランジャープレートは帯鋼をプレス加工によ
り外周および孔を所定の寸法に打抜き、プランジャーピ
ンは丸棒を所定長さに切断加工した後、冷間鍛造(大き
い物であれば温間あるいは熱間鍛造)により庇付のカッ
プ状に、また、カップ上面は切削により、外周は研削加
工して後、熱処理して一定の硬度とし、さらに外周を仕
上研削している。
The manufacturing process of the plunger (1) will be explained based on Fig. 1.The plunger plate is made by punching out the outer periphery and hole of a steel band into a predetermined size by pressing, and the plunger pin is made by punching a round bar into a predetermined length. After cutting, it is cold forged (warm or hot forged if it is large) into a cup shape with an eave, and the top surface of the cup is cut and the outer periphery is ground, and then heat treated to give a certain shape. It is hardened and the outer periphery is finished ground.

該プランジャーピンは、前記プランジャープレートに圧
入され、プランジャープレートにゴムを貼着けてプラン
ジャーは完成する。
The plunger pin is press-fitted into the plunger plate, and rubber is attached to the plunger plate to complete the plunger.

[発明が解決しようとする問題点] プランジャー(1)は、チェーン(3)の張力の影響で
、その駆動中は常に摺動してピストン運動を繰返すから
プランジャーピンの外周は非常に重要であり、キズやサ
ビ等の発生を防止する必要がある。従って、仕上研削が
なされたプランジャーピンは、そのゴム貼4けのざい、
及び他工場への運搬にさいしカバーがつけられ、プラン
ジャープレートの組付けにおいても、さらにゴム貼り作
業においてもキズ防止のためにカバーを必要とする。
[Problem to be solved by the invention] The outer circumference of the plunger pin is very important because the plunger (1) constantly slides and repeats piston motion during driving due to the tension of the chain (3). Therefore, it is necessary to prevent scratches, rust, etc. from occurring. Therefore, the plunger pin that has been finish ground has four rubber linings,
A cover is attached when transporting to another factory, and a cover is required to prevent scratches when assembling the plunger plate and also during rubber pasting work.

そこで本発明はプランジャーピンの品質を保持し、しか
も品質保持のためのカバー着脱等による余分な作業を排
除し、コスト低減を図ることを目的とするものであり、
プランジャープレートにゴムを貼着し、使方カップ状に
形成したプランジャーピンを、前記プランジャーヘッド
のプランジャープレートに嵌合して結合するチェーンテ
ンショナー用プランジャーの製造方法を提供せんとする
ものである。
Therefore, the present invention aims to maintain the quality of the plunger pin, and also eliminate the extra work such as attaching and detaching the cover to maintain the quality, thereby reducing costs.
To provide a method for manufacturing a plunger for a chain tensioner, in which a plunger pin formed into a cup shape by pasting rubber on a plunger plate is fitted and connected to the plunger plate of the plunger head. It is something.

[実施例] 本発明の実施例を第2図、第3図により詳述するに、プ
ランジャープレート(11)は、従来と同様、帯鋼から
所定の寸法に外周および孔がプレス加工され、ゴムを貼
着することでプランジャーヘッド(13)が完成する。
[Example] An example of the present invention will be described in detail with reference to FIGS. 2 and 3. As in the past, the plunger plate (11) is made of a steel strip with an outer periphery and a hole pressed to a predetermined size. The plunger head (13) is completed by pasting the rubber.

一方、プランジャーピン(12)は、丸棒から所定の寸
法に切断され、冷間鍛造によりカップ状に加工し、同時
にプランジャーピン(12)底部の中央に小孔(14)
を加工するか、もしくはドリル加工で小孔(14)を穿
設する。さらに、その上端面を切削して所定長さにし、
外周は研削する。これを従来と同様、所定の硬度に熱処
理し、仕上研削して真円度を得る。
On the other hand, the plunger pin (12) is cut into a predetermined size from a round bar, processed into a cup shape by cold forging, and at the same time has a small hole (14) in the center of the bottom of the plunger pin (12).
or drill a small hole (14). Furthermore, the upper end surface is cut to a predetermined length,
Grind the outer periphery. As in the past, this is heat treated to a predetermined hardness and finish ground to obtain roundness.

該プランジャーピン(12)は、前記したプランジャー
ヘッド(13)に圧入してプランジャー(1)は完成す
る。
The plunger pin (12) is press-fitted into the aforementioned plunger head (13) to complete the plunger (1).

プランジャーピン(12)を圧入するに際して、プラン
ジャーヘッド(13)にはプランジャーピン(12)を
通じ700Kg以上もの圧力を必要とし、非常に大きな
弾性体であるゴムを貼り着けた状態では、圧力における
安定度ならびにプランジャーヘッド(13)の上面との
垂直度を欠くため、700 Kt以上もの圧力を加える
ことは不可能である。そこで第3■に示すように、プラ
ンジャーヘッドC13’r+、該プランジャーヘッド(
13)と同一形状とした金型(15)内に挿入し、押え
冶具(16)によって前もって初期圧力を加える。この
初期圧力はブランジャーヘッ、ド(13)の大きさ、形
状、並びにゴムの種類によって異なるが、約1000K
g程度を必要とし、また初期圧力を一定に保つため、ス
プリング(17)を介して押える。このようにプランジ
ャーヘッド(13)のゴムに加圧して高静水圧状態とし
、高圧下におけるゴムの安定度、金型(15)と押え冶
具(16)とでゴムの硬化化をはかり、プランジャーヘ
ッド(13)の上面の水平度を確保した上で、プランジ
ャーピン(12)は押え棒により垂直に圧入される。
When press-fitting the plunger pin (12), a pressure of 700 kg or more is required through the plunger pin (12) to the plunger head (13). Due to the lack of stability and perpendicularity with the upper surface of the plunger head (13), it is impossible to apply pressures of more than 700 Kt. Therefore, as shown in No. 3 (3), the plunger head C13'r+, the plunger head (
It is inserted into a mold (15) having the same shape as 13), and an initial pressure is applied in advance using a holding jig (16). This initial pressure varies depending on the size and shape of the plunger head (13) and the type of rubber, but is approximately 1000K.
g, and in order to keep the initial pressure constant, it is pressed down via a spring (17). In this way, the rubber of the plunger head (13) is pressurized to create a high hydrostatic pressure state, and the stability of the rubber under high pressure and the hardening of the rubber are measured using the mold (15) and the holding jig (16). After ensuring the horizontality of the upper surface of the jar head (13), the plunger pin (12) is vertically press-fitted by a presser rod.

このようにしてプランジャーピン(12)がプランジャ
ーヘッド(13)に常に一定量圧入されるよう圧入口は
プランジャーピン高さ位置決めのワッシャ(19)によ
り調整され、さらにプランジャーヘッド(13)を構成
するプランジャープレート(11)の孔に密閉された小
孔(14)を通して流出し、高圧下で空気を密閉し、プ
ランジャープレート(11)とゴムが分1lIltする
ようなことは発生しない。
In this way, the pressure inlet is adjusted by the plunger pin height positioning washer (19) so that the plunger pin (12) is always press-fitted into the plunger head (13) by a constant amount, and the plunger head (13) is The air flows out through the small hole (14) that is sealed in the hole of the plunger plate (11) that constitutes the plunger plate (11), and the air is sealed under high pressure, so that the plunger plate (11) and the rubber do not come into contact with each other. .

[発明の効果] 以上のようにゴムを貼り着けたプランジャーヘッド(1
3)に、小孔(14)を設けたプランジャーピン(12
)を最後に嵌合・組付けすることにより、プランジャー
(1)の構成部品中最も重要なプランジャーピン(12
)の外周研削面の品質を保持することができ、従来の方
法によって問題とされてきたゴム貼着の際、及び運搬の
際のキズ、並びにサビを防止することができる。さらに
、プランジャーピン(12)の外周キズ防止のため、ゴ
ム貼着及び運搬の際にカバーを付け、余分な作業を行っ
て来たが、これら付帯作業を排除し、製造コストを大巾
に低減分ることができる。
[Effect of the invention] As described above, the plunger head (1
3), a plunger pin (12) with a small hole (14)
) is the most important component of the plunger (1) by fitting and assembling it last.
), it is possible to maintain the quality of the outer periphery ground surface, and it is possible to prevent scratches and rust during rubber attachment and transportation, which have been problems with conventional methods. Furthermore, in order to prevent scratches on the outer periphery of the plunger pin (12), extra work was required to attach rubber and cover during transportation, but by eliminating these incidental work, manufacturing costs can be greatly reduced. You can see the reduction.

プランジャーピン(12)は筒状としたパイプを所定長
さに切断して使用するlこともできるが、本発明のよう
に底材としたのは、薄板状のプランジャープレート(1
1)に嵌合するので、パイプ状のときその嵌合度合いが
厳しいほど縮管現象が現われ、固い嵌合が得られないか
らであり、さらに底部に設けた小孔(14)は該嵌合に
は影響を及ぼすことはない。
The plunger pin (12) can also be used by cutting a cylindrical pipe into a predetermined length, but the bottom material used in the present invention is a thin plunger plate (12).
1), so when the pipe is shaped, the tighter the fit, the more the tube contraction phenomenon appears and a firm fit cannot be obtained.Furthermore, the small hole (14) provided at the bottom is will not be affected.

このように本発明は、その形状を単にプランジャーピン
(12)底部の小孔(14)に特異性を有するものであ
るが、該孔によって製造工程を変更でき、プランジャー
(1)の品質向上、並びにコストの低減を図ることがで
き、非常に有用な発明である。
In this way, the shape of the present invention is unique only to the small hole (14) at the bottom of the plunger pin (12), but the hole allows the manufacturing process to be changed and the quality of the plunger (1) to be improved. It is a very useful invention that can improve the performance and reduce costs.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のプランジャー製造工程を示し、第2図は
本発明に係るプランジャー製造工程を示すものである。 さらに第3図は、プランジャーヘッドにスプリングによ
って初期圧力を加えてゴム硬化化させプランジャーピン
を圧入する状態を示しており、第4図はチェーンテンシ
ョナーの使用態様を示す。 (1)・・・プランジャー  (2)・・・ボディ(3
)・・・ローラチェーン
FIG. 1 shows a conventional plunger manufacturing process, and FIG. 2 shows a plunger manufacturing process according to the present invention. Further, FIG. 3 shows a state in which initial pressure is applied to the plunger head by a spring to harden the rubber and a plunger pin is press-fitted, and FIG. 4 shows how the chain tensioner is used. (1)...Plunger (2)...Body (3
)...roller chain

Claims (1)

【特許請求の範囲】 −1、プランジャープレートとプランジャーピンとを嵌
合一体化し、該プランジャープレートにゴムを貼着させ
てなるチェーンテンショナーのプランジャーにおいて、
プランジャープレートにゴムを貼着し、他方カップ状に
形成したプランジャーピンを、前記プランジャーヘッド
のプランジャープレートに嵌合して結合したことを特徴
とするチェーンテンショナー用プランジャーの製造方法
。 −2、プランジャーピンの底部には、小孔を穿設したこ
とを特徴とする特許請求の範囲第1項記載のチェーンテ
ンショナー用プランジャーの製造方法。 −3、プランジャーヘッドは初期加圧を加えて、ゴム硬
化化をはかり、プランジャーピンを圧入したことを特徴
とする特許請求の範囲第1項ないし第2項記載のチェー
ンテンショナー用プランジャーの製造方法。
[Claims] -1. A plunger for a chain tensioner in which a plunger plate and a plunger pin are fitted and integrated, and rubber is adhered to the plunger plate,
A method for manufacturing a plunger for a chain tensioner, characterized in that rubber is adhered to a plunger plate, and a plunger pin formed into a cup shape is fitted and connected to the plunger plate of the plunger head. -2. The method for manufacturing a plunger for a chain tensioner according to claim 1, wherein a small hole is formed in the bottom of the plunger pin. -3. The plunger for a chain tensioner according to claims 1 or 2, characterized in that the plunger head is initially pressurized to harden the rubber, and a plunger pin is press-fitted into the plunger head. Production method.
JP16134084A 1984-07-30 1984-07-30 Method of manufacturing plunger for chain tensioner Pending JPS6145165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16134084A JPS6145165A (en) 1984-07-30 1984-07-30 Method of manufacturing plunger for chain tensioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16134084A JPS6145165A (en) 1984-07-30 1984-07-30 Method of manufacturing plunger for chain tensioner

Publications (1)

Publication Number Publication Date
JPS6145165A true JPS6145165A (en) 1986-03-05

Family

ID=15733218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16134084A Pending JPS6145165A (en) 1984-07-30 1984-07-30 Method of manufacturing plunger for chain tensioner

Country Status (1)

Country Link
JP (1) JPS6145165A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS493059A (en) * 1972-03-16 1974-01-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS493059A (en) * 1972-03-16 1974-01-11

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