JPH0337665B2 - - Google Patents
Info
- Publication number
- JPH0337665B2 JPH0337665B2 JP56177805A JP17780581A JPH0337665B2 JP H0337665 B2 JPH0337665 B2 JP H0337665B2 JP 56177805 A JP56177805 A JP 56177805A JP 17780581 A JP17780581 A JP 17780581A JP H0337665 B2 JPH0337665 B2 JP H0337665B2
- Authority
- JP
- Japan
- Prior art keywords
- spherical body
- connecting rod
- piston
- receiving seat
- ball receiving
- 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.)
- Expired - Lifetime
Links
- 238000003466 welding Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010273 cold forging Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/10—Connection to driving members
- F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
- F16J1/22—Connection to driving members with connecting-rods, i.e. pivotal connections with universal joint, e.g. ball-joint
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、密閉形圧縮機等に使用されるボール
ジヨイントピストンの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method of manufacturing a ball joint piston used in a hermetic compressor or the like.
（従来の技術）
密閉形圧縮機は第１図に示す如く電動要素１と
圧縮要素２を容器３内に密閉したものであり、電
動要素１の作動でクランク軸４を回転させ、圧縮
要素２を作動するようになつている。この圧縮要
素２としてはレシプロ式圧縮機構５が広く用いら
れ、クランク軸４の回転動作をピストン本体６の
往復直線動作に変えるのに第２図に詳示する如き
ボールジヨイントピストンが使用される。ボール
ジヨイントピストンは、一端に球状体７、他端に
クランク軸４にはまるビツクエンド８を固設した
連結棒９と、球状体７を保持する球受け座１０を
形成したピストン本体６とからなり、球状体７は
球受け座１０に回動自在に支持されるようになつ
ている。この球状体７やビツクエンド８を連結棒
９に固着するには、接合強度が高く、かつ、安価
な抵抗溶接が行なわれる。(Prior art) As shown in FIG. 1, a hermetic compressor has an electric element 1 and a compression element 2 sealed in a container 3. The operation of the electric element 1 rotates a crankshaft 4, and the compression element 2 is rotated by the operation of the electric element 1. It's starting to work. A reciprocating compression mechanism 5 is widely used as the compression element 2, and a ball joint piston as shown in FIG. . The ball joint piston consists of a connecting rod 9 having a spherical body 7 at one end, a connecting rod 9 having a big end 8 fixedly attached to the crankshaft 4 at the other end, and a piston body 6 having a ball receiving seat 10 for holding the spherical body 7. , the spherical body 7 is rotatably supported by a ball receiving seat 10. To fix the spherical body 7 and the big end 8 to the connecting rod 9, resistance welding, which has high bonding strength and is inexpensive, is used.
（発明が解決しようとする課題）
従来のボールジヨイントピストンの製造方法に
おいては、抵抗溶接時に球状体７の電極を当てた
部分の表面に跡（電極跡という）が残るという問
題があつた。この電極跡は球状体７の表面粗さを
悪化させ、球状体７と球受け座１０との摺動部の
円滑さを著しく損わせる。この対策として電極跡
を除去することが考えられるが、除去には多大の
手数を要し、製造コストの上昇を招来する。(Problems to be Solved by the Invention) In the conventional method of manufacturing a ball joint piston, there was a problem in that marks (referred to as electrode marks) remained on the surface of the part of the spherical body 7 to which the electrode was applied during resistance welding. These electrode marks deteriorate the surface roughness of the spherical body 7 and significantly impair the smoothness of the sliding portion between the spherical body 7 and the ball receiving seat 10. A possible countermeasure to this problem is to remove the electrode traces, but this requires a great deal of effort and increases manufacturing costs.
本発明は、以上の如き問題点に鑑みてなされた
もので、抵抗溶接により球状体の表面に電極跡が
生じても、この電極跡による悪影響が球状体と球
受け座との摺動部に及ばないようにし、摺動部の
円滑さを確保することができるボールジヨイント
ピストンを製造できるボールジヨイントピストン
の製造方法を提供することを目的としている。 The present invention has been made in view of the above-mentioned problems, and even if electrode marks are formed on the surface of the spherical body due to resistance welding, these electrode marks have an adverse effect on the sliding part between the spherical body and the ball seat. It is an object of the present invention to provide a method for manufacturing a ball joint piston that can manufacture a ball joint piston that can ensure the smoothness of the sliding part.
（課題を解決するための手段）
第１の発明のボールジヨイントピストンの製造
方法は、球受け座を有するピストン本体と、連結
棒の一端に設けられ前記ピストン本体の球受け座
に保持された球状体と、連結棒の他端に設けられ
クランク軸に嵌入されるビツクエンドとからなる
ボールジヨイントピストンの製造方法において、
前記球状体と連結棒または連結棒とビツクエンド
を抵抗溶接により固着すると共に、前記ピストン
本体の球受け座に予め球受け座の球面中心からの
角度βが、
β＞α＋θ
ただしα：連結棒の揺動角
θ：球状体中心からの抵抗溶接時に
球状体に生じる電極跡角度
の大きさを有する凹部を形成し、前記ピストン本
体の球受け座に前記球状体を保持したものであ
る。
(Means for Solving the Problems) A method for manufacturing a ball joint piston according to the first invention includes a piston body having a ball receiving seat, and a connecting rod provided at one end of the connecting rod and held by the ball receiving seat of the piston body. In a method for manufacturing a ball joint piston comprising a spherical body and a big end provided at the other end of a connecting rod and fitted into a crankshaft,
The spherical body and the connecting rod or the connecting rod and the big end are fixed by resistance welding, and the angle β from the center of the spherical surface of the ball receiving seat of the piston body is set in advance so that β>α+θ, where α: oscillation of the connecting rod. Dynamic angle θ: A concave portion having the size of the electrode trace angle produced on the spherical body during resistance welding from the center of the spherical body is formed, and the spherical body is held in the ball receiving seat of the piston body.
また、第２の発明のボールジヨイントピストン
の製造方法は、球受け座を有するピストン本体
と、連結棒の一端に設けられ前記ピストン本体の
球受け座に保持された球状体と、連結棒の他端に
設けられクランク軸に嵌入されるビツクエンドと
からなるボールジヨイントピストンの製造方法に
おいて、前記球状体に抵抗溶接時に球状体に生じ
る電極跡の全てを生じさせる凹部を形成し、前記
凹部に電極を突き当てて前記球状体と連結棒また
は連結棒とビツクエンドを抵抗溶接により固着す
ると共に、前記ピストン本体の球受け座に前記球
状体を保持したものである。 Further, the method for manufacturing a ball joint piston according to the second invention includes: a piston main body having a ball receiving seat; a spherical body provided at one end of a connecting rod and held in the ball receiving seat of the piston body; In the manufacturing method of a ball joint piston, the ball joint piston includes a big end provided at the other end and fitted into the crankshaft, in which a concave portion is formed in the spherical body to generate all the electrode marks that occur on the spherical body during resistance welding; The spherical body and the connecting rod or the connecting rod and the big end are fixed by resistance welding by abutting electrodes, and the spherical body is held in the ball receiving seat of the piston body.
（作用）
このような構成により、抵抗溶接時に球状体に
生じる電極跡の除去作業を行なうことなしに、球
状体の電極跡とピストン本体の球受け座との摺動
を防止でき、製造コストの上昇を招来することな
しに信頼性の高いボールジヨイントピストンを製
造することができる。(Function) With this configuration, it is possible to prevent the electrode marks on the spherical body from sliding on the ball receiving seat of the piston body, without having to remove the electrode marks that occur on the spherical body during resistance welding, and to reduce manufacturing costs. A highly reliable ball joint piston can be manufactured without causing rise.
（実施例）
以下第１の発明の一実施例に係わるボールジヨ
イントピストンの製造方法について、第３図及び
第４図に基づいて説明する。(Example) A method of manufacturing a ball joint piston according to an example of the first invention will be described below with reference to FIGS. 3 and 4.
第４図に示すように、まず連結棒９の一端に球
状体としての鋼球７を当接すると共に、他端にク
ランク軸４に嵌入されるビツクエンド８を当接し
た状態で、鋼球７の表面及びビツクエンド８の内
周面に抵抗溶接用の電極１２，１３を突き当て、
鋼球７と連結棒９及び連結棒９とビツクエンド８
をそれぞれ抵抗溶接する。また、第３図に示すよ
うに、ピストン本体６の球受け座１０の底面に
は、前記抵抗溶接によつて鋼球７の表面に生じる
電極跡を逃がす凹部１１を予め形成する。この凹
部１１は、連結棒９の揺動角をα、鋼球７表面の
電極跡の大きさ（鋼球７中心O′からの抵抗溶接
時に鋼球７に生じる電極跡角度）をθとしたと
き、球受け座１０の球面中心Ｏからの角度βが、
β＞α＋θ
の大きさになるように形成する。 As shown in FIG. 4, first, a steel ball 7 as a spherical body is brought into contact with one end of the connecting rod 9, and a big end 8 fitted into the crankshaft 4 is brought into contact with the other end. Electrodes 12 and 13 for resistance welding are pressed against the surface and the inner peripheral surface of the big end 8,
Steel ball 7 and connecting rod 9 and connecting rod 9 and big end 8
Resistance weld each. Further, as shown in FIG. 3, a recess 11 is formed in advance on the bottom surface of the ball receiving seat 10 of the piston body 6 to allow electrode traces produced on the surface of the steel ball 7 by the resistance welding to escape. This recess 11 is formed by setting the swing angle of the connecting rod 9 to α and the size of the electrode mark on the surface of the steel ball 7 (the electrode mark angle produced on the steel ball 7 during resistance welding from the center O' of the steel ball 7) to θ. At this time, the angle β from the spherical center O of the ball receiving seat 10 is formed so that β>α+θ.
次に、前記ピストン本体６の球受け座１０に前
記鋼球７を例えばカシメ等により保持しする。 Next, the steel ball 7 is held in the ball receiving seat 10 of the piston body 6 by, for example, caulking.
このようにすることにより、鋼球７の電極跡は
連結棒９の揺動にかかわらず、常にピストン本体
６の球受け座１０の凹部１１内にのみ位置し、鋼
球７と球受け座１０との摺動部に悪影響を及ぼす
ことはない。 By doing so, the electrode trace of the steel ball 7 is always located only in the recess 11 of the ball receiving seat 10 of the piston body 6, regardless of the swinging of the connecting rod 9, and the steel ball 7 and the ball receiving seat 10 are It will not have any adverse effect on the sliding parts.
次に、第２の発明の一実施例に係わるボールジ
ヨイントピストンの製造方法について、第５図及
び第６図に基づいて説明する。 Next, a method of manufacturing a ball joint piston according to an embodiment of the second invention will be explained based on FIGS. 5 and 6.
まず、第６図に示すように、球状体７と連結棒
９とを冷間鍛造により一体成形すると共に、前記
球状体７の頂部に、予め抵抗溶接時に電極を受け
抵抗溶接によつて球状体７に生じる電極跡の全て
を生じさせる凹部１６を形成する。凹部１６の大
きさ（球状体７の中心O′からの角度）βは、抵
抗溶接用の電極１２を入れるに十分な大きさに形
成される。次に、連結棒９の他端にクランク軸４
に嵌入されるビツクエンド８を当接し、球状体７
の前記凹部１６及びビツクエンド８の内周面に抵
抗溶接用の電極１２，１３を突き当て、連結棒９
とビツクエンド８を抵抗溶接する。次に、第５図
に示すように、前記ピストン本体６の球受け座１
０に前記球状体７を例えばカシメ等により保持し
する。 First, as shown in FIG. 6, the spherical body 7 and the connecting rod 9 are integrally formed by cold forging, and the spherical body 7 is attached to the top of the spherical body 7 by resistance welding. A recess 16 is formed in which all of the electrode traces that occur at 7 are formed. The size β of the recess 16 (angle from the center O' of the spherical body 7) is formed to be large enough to accommodate the electrode 12 for resistance welding. Next, the crankshaft 4 is attached to the other end of the connecting rod 9.
The big end 8 inserted into the spherical body 7 is brought into contact with the
The electrodes 12 and 13 for resistance welding are abutted against the inner peripheral surface of the concave portion 16 and the big end 8, and the connecting rod 9 is
and the big end 8 are resistance welded. Next, as shown in FIG. 5, the ball receiving seat 1 of the piston body 6 is
The spherical body 7 is held at zero by, for example, caulking.
このようにすることにより、抵抗溶接時の電極
跡は前記球状体７の凹部１６内にのみ生じ、球状
体７の表面には生じない。したがつて、球状体７
と球受け座１０との摺動部に悪影響を及ぼすこと
はない。 By doing so, electrode marks during resistance welding occur only in the recess 16 of the spherical body 7, and not on the surface of the spherical body 7. Therefore, the spherical body 7
There is no adverse effect on the sliding part between the ball receiving seat 10 and the ball receiving seat 10.
なお、前記第１の発明の実施例においては、球
状体と連結棒とを別体に形成してそれらを抵抗溶
接により固着するようにしたものについて説明
し、前記第２の発明の実施例においては、球状体
と連結棒とを冷間鍛造により一体成形したものに
ついて説明したが、これらは任意に選択可能であ
る。 In the embodiment of the first invention, the spherical body and the connecting rod are formed separately and fixed by resistance welding, and in the embodiment of the second invention, described a case in which the spherical body and the connecting rod were integrally molded by cold forging, but these can be arbitrarily selected.
以上説明したように、第１及び第２の発明によ
れば、抵抗溶接時に球状体に生じる電極跡の除去
作業を行なうことなしに、球状体の電極跡とピス
トン本体の球受け座との摺動を防止でき、製造コ
ストの上昇を招来することなしに信頼性の高いボ
ールジヨイントピストンを製造することができ
る。
As explained above, according to the first and second inventions, the sliding between the electrode marks on the spherical body and the ball receiving seat of the piston body can be achieved without removing the electrode marks generated on the spherical body during resistance welding. A highly reliable ball joint piston can be manufactured without causing an increase in manufacturing costs.
第１図は圧縮機の一例を示す縦断面図、第２図
は従来の製造方法により製造されたボールジヨイ
ントピストンの一例を示す斜視図、第３図は第１
の発明により製造されたボールジヨイントピスト
ンの要部拡大断面図、第４図は第３図のボールジ
ヨイントピストンの抵抗溶接状況を示す平面図、
第５図は第２の発明により製造されたボールジヨ
イントピストンの要部拡大断面図、第６図は第５
図のボールジヨイントピストンの抵抗溶接状況を
示す断面図である。
６……ピストン本体、７……球状体、８……ビ
ツクエンド、９……連結棒、１０……球受け座、
１１……凹部、１２，１３……電極、１６……凹
部。
Fig. 1 is a longitudinal cross-sectional view showing an example of a compressor, Fig. 2 is a perspective view showing an example of a ball joint piston manufactured by a conventional manufacturing method, and Fig. 3 is a longitudinal sectional view showing an example of a compressor.
FIG. 4 is a plan view showing resistance welding of the ball joint piston shown in FIG. 3;
FIG. 5 is an enlarged sectional view of the main part of the ball joint piston manufactured according to the second invention, and FIG.
FIG. 3 is a sectional view showing resistance welding of the ball joint piston shown in the figure. 6... Piston body, 7... Spherical body, 8... Big end, 9... Connecting rod, 10... Ball seat,
11... recess, 12, 13... electrode, 16... recess.
Claims (1)
一端に設けられ前記ピストン本体の球受け座に保
持された球状体と、連結棒の他端に設けられクラ
ンク軸に嵌入されるビツクエンドとからなるボー
ルジヨイントピストンの製造方法において、前記
球状体と連結棒または連結棒とビツクエンドを抵
抗溶接により固着すると共に、前記ピストン本体
の球受け座に予め球受け座の球面中心からの角度
βが、 β＞α＋θ ただしα：連結棒の揺動角 θ：球状体中心からの抵抗溶接時に 球状体に生じる電極跡角度 の大きさを有する凹部を形成し、前記ピストン本
体の球受け座に前記球状体を保持したことを特徴
とするボールジヨイントピストンの製造方法。 ２ 球受け座を有するピストン本体と、連結棒の
一端に設けられ前記ピストン本体の球受け座に保
持された球状体と、連結棒の他端に設けられクラ
ンク軸に嵌入されるビツクエンドとからなるボー
ルジヨイントピストンの製造方法において、前記
球状体に抵抗溶接時に球状体に生じる電極跡の全
てを生じさせる凹部を形成し、前記凹部に電極を
突き当てて前記球状体と連結棒または連結棒とビ
ツクエンドを抵抗溶接により固着すると共に、前
記ピストン本体の球受け座に前記球状体を保持し
たことを特徴とするボールジヨイントピストンの
製造方法。[Scope of Claims] 1. A piston body having a ball receiving seat, a spherical body provided at one end of a connecting rod and held in the ball receiving seat of the piston body, and a spherical body provided at the other end of the connecting rod and fitted into the crankshaft. In the method of manufacturing a ball joint piston, the spherical body and the connecting rod or the connecting rod and the big end are fixed by resistance welding, and the ball joint piston is attached to the ball receiving seat of the piston body in advance from the center of the spherical surface of the ball receiving seat. The angle β is β > α + θ where α is the swing angle of the connecting rod and θ is the angle of the electrode trace produced on the spherical body during resistance welding from the center of the spherical body. A method for manufacturing a ball joint piston, characterized in that the spherical body is held in a seat. 2 Consists of a piston body having a ball receiving seat, a spherical body provided at one end of a connecting rod and held in the ball receiving seat of the piston body, and a big end provided at the other end of the connecting rod and fitted into the crankshaft. In the method for manufacturing a ball joint piston, a concave portion is formed in the spherical body to generate all the electrode traces that occur on the spherical body during resistance welding, and an electrode is abutted against the concave portion to connect the spherical body to a connecting rod or a connecting rod. A method for manufacturing a ball joint piston, characterized in that the big end is fixed by resistance welding, and the spherical body is held in a ball receiving seat of the piston body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17780581A JPS5881266A (en) | 1981-11-07 | 1981-11-07 | Ball joint piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17780581A JPS5881266A (en) | 1981-11-07 | 1981-11-07 | Ball joint piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5881266A JPS5881266A (en) | 1983-05-16 |
| JPH0337665B2 true JPH0337665B2 (en) | 1991-06-06 |
Family
ID=16037389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17780581A Granted JPS5881266A (en) | 1981-11-07 | 1981-11-07 | Ball joint piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5881266A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105051357B (en) * | 2013-01-21 | 2018-05-18 | 费德罗-莫格尔公司 | Piston and its manufacturing method |
| GB2550135B (en) * | 2016-05-09 | 2021-08-25 | Ultra Electronics Ltd | Axially Loaded spherical Joint assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5437761B2 (en) * | 1974-01-25 | 1979-11-16 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5437761U (en) * | 1977-08-19 | 1979-03-12 |
-
1981
- 1981-11-07 JP JP17780581A patent/JPS5881266A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5437761B2 (en) * | 1974-01-25 | 1979-11-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5881266A (en) | 1983-05-16 |
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