JP4167161B2 - Rough crankshaft for multi-cylinder engines - Google Patents

Rough crankshaft for multi-cylinder engines Download PDF

Info

Publication number
JP4167161B2
JP4167161B2 JP2003352328A JP2003352328A JP4167161B2 JP 4167161 B2 JP4167161 B2 JP 4167161B2 JP 2003352328 A JP2003352328 A JP 2003352328A JP 2003352328 A JP2003352328 A JP 2003352328A JP 4167161 B2 JP4167161 B2 JP 4167161B2
Authority
JP
Japan
Prior art keywords
crankshaft
arm
die
cutting direction
journal
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 - Fee Related
Application number
JP2003352328A
Other languages
Japanese (ja)
Other versions
JP2005114131A (en
Inventor
幸博 藤岡
優 木崎
伸久 藤野
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.)
Hino Motors Ltd
Sumitomo Metal Industries Ltd
Original Assignee
Hino Motors Ltd
Sumitomo Metal Industries 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 Hino Motors Ltd, Sumitomo Metal Industries Ltd filed Critical Hino Motors Ltd
Priority to JP2003352328A priority Critical patent/JP4167161B2/en
Publication of JP2005114131A publication Critical patent/JP2005114131A/en
Application granted granted Critical
Publication of JP4167161B2 publication Critical patent/JP4167161B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/08—Making machine elements axles or shafts crankshafts
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F16C3/08—Crankshafts made in one piece

Description

本発明は、多気筒エンジンの鍛造クランクシャフト粗材に係り、特に、剛性を落すことなく軽量化を図ることができる粗材に関するものである。   The present invention relates to a forged crankshaft rough material of a multi-cylinder engine, and more particularly to a rough material that can be reduced in weight without reducing rigidity.

例えば直列６気筒エンジン用のクランクシャフトをツイスト工法を用いない一体鍛造で製作するに際して、従来では型抜き方向に突出するアームであっても、片割り線との関係から肉盗みすることができない他のアームと同一形状にしていたために、剛性にほとんど寄与しない部分に駄肉がついてしまい、重量を軽減するにも限界があった（例えば特許文献１を参照）。
特開２００３−３５３０７号公報 For example, when producing a crankshaft for an in-line 6-cylinder engine by integral forging without using the twist method, conventionally, even if the arm protrudes in the die-cutting direction, it cannot be stealed from the relationship with the split line. Since the arm has the same shape as that of the arm, the portion that hardly contributes to rigidity is stuck, and there is a limit in reducing the weight (see, for example, Patent Document 1).
JP 2003-35307 A

解決しようとする問題点は、クランクシャフトの剛性を落すことなくその重量を軽減することができない点である。   The problem to be solved is that the weight cannot be reduced without reducing the rigidity of the crankshaft.

本発明は、ジャーナルから型抜き方向に突出するアームおよび型抜き方向と異なる方向に突出するアームの先端にそれぞれピンを設けた鍛造クランクシャフト粗材において、前記型抜き方向に突出するアームにおけるジャーナル側表面およびピン側表面の中央部に、型抜き方向先端側が開放端となり、開放端に至るにつれて深さが漸増する凹溝による肉盗みを設けたことを最も主要な特徴としている。 The present invention relates to a forged crankshaft rough member provided with a pin at each end of an arm protruding in a die cutting direction and an arm protruding in a direction different from the die cutting direction, and the journal side of the arm protruding in the die cutting direction. the central portion of the surface and the pin surface, die cutting direction leading side Ri Do an open end, the depth as the distance from the open end is a most important feature in that a thickness reduction by the groove gradually increasing.

本発明は、クランクシャフトの剛性にさほど寄与しないアームにおけるジャーナル側表面およびピン側表面の中央部に、型抜き方向先端側が開放端となる凹溝による肉盗みを設けたものであるから、剛性を落すことなく多気筒エンジンの鍛造クランクシャフトを軽量化することができるという利点がある。   In the present invention, since the arm that does not contribute to the rigidity of the crankshaft does not contribute much to the center of the journal-side surface and the pin-side surface, a meat stealer is provided by a concave groove whose leading end in the mold release direction is an open end. There is an advantage that the forged crankshaft of the multi-cylinder engine can be reduced in weight without dropping.

図１は本発明に係る多気筒エンジンのクランクシャフト粗材の一実施形態を示す要部の側面図、図２は図１のＡ矢視図である。   FIG. 1 is a side view of a main part showing an embodiment of a crankshaft rough material of a multi-cylinder engine according to the present invention, and FIG. 2 is a view taken in the direction of arrow A in FIG.

これらの図において、クランクシャフト粗材１には、ジャーナル２から図示しない鍛造型の型抜き方向に突出する第２、第５気筒用のアーム３および型抜き方向と異なる方向に突出する第１、第３、第４、第６気筒用のアーム（いずれも図示省略）を設けており、各アームの先端にそれぞれピン４を設けている。   In these drawings, the crankshaft rough material 1 includes a second and fifth cylinder arms 3 projecting from a journal 2 in a die cutting direction of a forging die (not shown) and a first projecting in a direction different from the die cutting direction. Arms for the third, fourth and sixth cylinders (all not shown) are provided, and a pin 4 is provided at the tip of each arm.

ここに本実施形態においては、型抜き方向に突出する第２、第５気筒用のアーム３におけるジャーナル側表面５およびピン側表面６の中央部に、型抜き方向先端側を開放端とした凹溝７、８による肉盗みを設けることにより、このアーム３の重量を低減している。   Here, in the present embodiment, a recess with the front end side in the die-cutting direction as an open end is provided at the center of the journal-side surface 5 and the pin-side surface 6 in the arms 3 for the second and fifth cylinders protruding in the die-cutting direction. By providing meat stealing by the grooves 7 and 8, the weight of the arm 3 is reduced.

なお、ジャーナル２およびピン４ならびにアーム３には必要に応じて従来同様に潤滑油路を設けるとともに、ジャーナル２およびピン４の表面を研削加工してクランクシャフトが構成される。   The journal 2, the pin 4, and the arm 3 are provided with lubricating oil passages as necessary, and the surfaces of the journal 2 and the pin 4 are ground to form a crankshaft.

ところで、本実施形態においては開放端に至るにつれて深さが漸増する凹溝７、８による肉盗みを設けて鍛造型の抜き勾配を確保するようにしているが、要するに鍛造段階で肉盗みを形成することができるものであれば凹溝７、８の形状は任意である。   By the way, in this embodiment, the stealing of the forging die is ensured by providing the meat stealing by the concave grooves 7 and 8 whose depth gradually increases toward the open end, but in short, the meat stealing is formed at the forging stage. The shape of the concave grooves 7 and 8 is arbitrary as long as it can be performed.

また、クランクシャフトの回転方向前面および後面を除外して、アーム３におけるジャーナル側表面５およびピン側表面６の中央部に凹溝７、８を設けて肉盗みをして駄肉を削減するようにしたものであるために、クランクシャフトの捩り剛性に大きな影響を及ぼす回転方向へのアーム３の剛性はほとんど低下しない。   Further, except for the front and rear surfaces in the rotational direction of the crankshaft, the grooves 3 and 8 are provided in the central portions of the journal side surface 5 and the pin side surface 6 in the arm 3 to steal meat and reduce the waste. Therefore, the rigidity of the arm 3 in the rotation direction that greatly affects the torsional rigidity of the crankshaft is hardly lowered.

そして、肉盗みによる重量の軽減分に相当する分だけ図示しないバランスウェイトを軽量化してクランクシャフトの重量を軽減することができるために、全体として、肉盗みによる軽減重量のほぼ２倍に相当する重量を軽減することが可能となる。よって、クランクシャフトの剛性を低下させることなくその重量を軽減することができ、エンジンの重量軽減に寄与するところは大きい。   Since the balance weight (not shown) can be reduced by the amount corresponding to the weight reduction due to the meat stealing and the weight of the crankshaft can be reduced as a whole, it corresponds to almost twice the weight reduction due to the meat stealing. The weight can be reduced. Therefore, the weight of the crankshaft can be reduced without reducing the rigidity of the crankshaft, which greatly contributes to reducing the weight of the engine.

なお、実施形態においては、本発明を直列６気筒エンジンの鍛造クランクシャフト粗材に適用しているが、例えば直列５気筒エンジン用のクランクシャフトのように鍛造型抜き方向に突出するアームと型抜き方向と異なる方向に突出するアームの先端にそれぞれピンを設けた鍛造クランクシャフト粗材であれば本発明を適用して上記実施形態の場合と同様の作用効果を得ることができる。   In the embodiment, the present invention is applied to a rough forged crankshaft material of an in-line 6-cylinder engine. If the forged crankshaft rough material is provided with a pin at the tip of an arm that protrudes in a direction different from the direction, the present invention can be applied to obtain the same effect as in the case of the above embodiment.

本発明に係る多気筒エンジンのクランクシャフト粗材の一実施形態を示す要 部の側面図である。1 is a side view of a main part showing an embodiment of a crankshaft coarse material of a multi-cylinder engine according to the present invention. 図１のＡ矢視図である。It is A arrow directional view of FIG.

符号の説明Explanation of symbols

１ クランクシャフト粗材
２ ジャーナル
３ アーム
４ ピン
５ ジャーナル側表面
６ ピン側表面
７、８ 凹溝 1 Crankshaft coarse material 2 Journal 3 Arm 4 Pin 5 Journal side surface 6 Pin side surface 7, 8 Concave groove

Claims (1)

ジャーナル２から型抜き方向に突出するアーム３および型抜き方向と異なる方向に突出するアームの先端にそれぞれピン４を設けた鍛造クランクシャフト粗材１において、前記型抜き方向に突出するアーム３におけるジャーナル側表面５およびピン側表面６の中央部に、型抜き方向先端側が開放端となり、開放端に至るにつれて深さが漸増する凹溝７、８による肉盗みを設けたことを特徴とする多気筒エンジンのクランクシャフト粗材。 The journal 3 in the arm 3 protruding in the die-cutting direction in the arm 3 protruding in the die-cutting direction from the journal 2 and the forged crankshaft rough material 1 provided with the pins 4 at the tips of the arms protruding in the direction different from the die-cutting direction, respectively. the central portion of the side surface 5 and the pin side surfaces 6, Ri Do a die cutting direction leading end side open end, characterized in that a thinned by grooves 7,8 depth gradually increases as the distance from the open end Rough crankshaft for multi-cylinder engines.
JP2003352328A 2003-10-10 2003-10-10 Rough crankshaft for multi-cylinder engines Expired - Fee Related JP4167161B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003352328A JP4167161B2 (en) 2003-10-10 2003-10-10 Rough crankshaft for multi-cylinder engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003352328A JP4167161B2 (en) 2003-10-10 2003-10-10 Rough crankshaft for multi-cylinder engines

Publications (2)

Publication Number Publication Date
JP2005114131A JP2005114131A (en) 2005-04-28
JP4167161B2 true JP4167161B2 (en) 2008-10-15

Family

ID=34543302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003352328A Expired - Fee Related JP4167161B2 (en) 2003-10-10 2003-10-10 Rough crankshaft for multi-cylinder engines

Country Status (1)

Country Link
JP (1) JP4167161B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106574650A (en) * 2014-08-07 2017-04-19 新日铁住金株式会社 Crankshaft of reciprocating engine
CN106662140A (en) * 2014-07-16 2017-05-10 新日铁住金株式会社 Crank shaft for reciprocating engine

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4998233B2 (en) * 2007-11-28 2012-08-15 住友金属工業株式会社 Crankshaft for multi-cylinder engine
CN102365467B (en) 2009-03-26 2015-04-08 本田技研工业株式会社 Crankshaft and method for manufacturing same
JP5249831B2 (en) * 2009-03-26 2013-07-31 本田技研工業株式会社 Crankshaft and manufacturing method thereof
MX367834B (en) * 2013-11-21 2019-09-05 Nippon Steel Corp Production method for forged crank shaft.
US10086425B2 (en) * 2013-11-21 2018-10-02 Nippon Steel & Sumitomo Metal Corporation Method for producing a forged crankshaft
US10058912B2 (en) * 2013-11-21 2018-08-28 Nippon Steel & Sumitomo Metal Corporation Method for producing a forged crankshaft
EP3170576B1 (en) * 2014-07-14 2018-12-19 Nippon Steel & Sumitomo Metal Corporation Method for producing a forged crankshaft
JP6442998B2 (en) * 2014-11-18 2018-12-26 愛知製鋼株式会社 Crankshaft
JP6447117B2 (en) * 2014-12-26 2019-01-09 新日鐵住金株式会社 Manufacturing method of forged crankshaft
JP6443546B2 (en) * 2015-06-12 2018-12-26 新日鐵住金株式会社 Reciprocating engine crankshaft

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106662140A (en) * 2014-07-16 2017-05-10 新日铁住金株式会社 Crank shaft for reciprocating engine
CN106662140B (en) * 2014-07-16 2019-06-21 日本制铁株式会社 The crankshaft of reciprocating engine
CN106574650A (en) * 2014-08-07 2017-04-19 新日铁住金株式会社 Crankshaft of reciprocating engine
CN106574650B (en) * 2014-08-07 2019-09-24 日本制铁株式会社 The crankshaft of reciprocating engine

Also Published As

Publication number Publication date
JP2005114131A (en) 2005-04-28

Similar Documents

Publication Publication Date Title
JP4167161B2 (en) Rough crankshaft for multi-cylinder engines
JP4998233B2 (en) Crankshaft for multi-cylinder engine
JP2008215532A (en) Bearing structure of crankshaft
EP1178193A3 (en) Engine unit of motorcycle
WO2008044719A1 (en) Jig and method for processing cylinder block
JP2000179535A (en) Bearing metal positioning structure in split type connecting rod
CN102840217B (en) Connecting rod fracture splitting method and apparatus therefor
US9784304B2 (en) Connecting rod for an engine and method of making thereof
US10352352B2 (en) Machining oval cores in crankshafts
US20040216605A1 (en) Wrist pin
EP1865183B1 (en) Method of manufacturing a cylinder block
JP5626485B2 (en) Cast parts for internal combustion engines, bearing caps, and methods for manufacturing the same
JP4799047B2 (en) Connecting rod, internal combustion engine equipped with the same, and motor vehicle
JP3016900B2 (en) Manufacturing method of engine cylinder block
JP2007003000A (en) Connecting rod, internal combustion engine equipped therewith and automobile
EP1808607B1 (en) Journal bearing structure for crankshaft
JP2009197929A (en) Crankshaft
JP2000052228A (en) Bore processing jig of cylinder block
JP5363861B2 (en) Forged materials for automobile suspension arms
JP6196796B2 (en) Connecting rod
CN200999791Y (en) Spheroidal iron crankshaft
JP4450534B2 (en) 3-part connecting rod
CN101225850A (en) Crankshaft with reinforcing member
JP2005248806A (en) Piston for internal combustion engine
JPH0625650Y2 (en) Piston for internal combustion engine

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051017

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080221

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080226

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080423

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080729

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080731

R150 Certificate of patent or registration of utility model

Ref document number: 4167161

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110808

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120808

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120808

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130808

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130808

Year of fee payment: 5

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313115

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130808

Year of fee payment: 5

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees