JPS56131820A - Structure of engine crank shaft - Google Patents

Structure of engine crank shaft

Info

Publication number
JPS56131820A
JPS56131820A JP3318080A JP3318080A JPS56131820A JP S56131820 A JPS56131820 A JP S56131820A JP 3318080 A JP3318080 A JP 3318080A JP 3318080 A JP3318080 A JP 3318080A JP S56131820 A JPS56131820 A JP S56131820A
Authority
JP
Japan
Prior art keywords
crank
crank pin
arm
relief
relief part
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.)
Granted
Application number
JP3318080A
Other languages
Japanese (ja)
Other versions
JPS60564B2 (en
Inventor
Shigezo Fukuda
Shoichi Yoshino
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP3318080A priority Critical patent/JPS60564B2/en
Publication of JPS56131820A publication Critical patent/JPS56131820A/en
Publication of JPS60564B2 publication Critical patent/JPS60564B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

PURPOSE: To prevent stress from concentrating on a crank arm part by a method wherein a relief part is provided on the end part of a balance weight on the opposite side of a crank pin which is arranged continnously to a crank arm so that a concave part can be worked by the use of the said relief part at the connecting part between the crank arm and the crank pin.
CONSTITUTION: On the crank shaft, a pair of crank arms 2, 2 are arranged continuously with journals 1, 1, a pair of arms 2, 2 are connected mutually by a crank pin 3 and a balance weight 4 is arranged continuously on their oppsoite side. At this time, the relief part 5 is provided by machining after cast-molding or casting on the opposite ends of the balance weights 4, 4. At the connecting place between the crank pin 3 and the crank arm 2, a concave part 7 is formed by impression work by a straight push rod through the relief part 5 and the tensile stress to the arm 2 near the connecting place can be released from concentrating. Moreover, a concave part 8 is provided in the crank pin 3 in order to restrain the unbalance due to the relief part 5.
COPYRIGHT: (C)1981,JPO&Japio
JP3318080A 1980-03-14 1980-03-14 Engine crankshaft structure Expired JPS60564B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3318080A JPS60564B2 (en) 1980-03-14 1980-03-14 Engine crankshaft structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3318080A JPS60564B2 (en) 1980-03-14 1980-03-14 Engine crankshaft structure

Publications (2)

Publication Number Publication Date
JPS56131820A true JPS56131820A (en) 1981-10-15
JPS60564B2 JPS60564B2 (en) 1985-01-09

Family

ID=12379304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3318080A Expired JPS60564B2 (en) 1980-03-14 1980-03-14 Engine crankshaft structure

Country Status (1)

Country Link
JP (1) JPS60564B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527330U (en) * 1991-09-20 1993-04-09 三菱自動車工業株式会社 Crank Shaft Counterweight Shape
JP2015197113A (en) * 2014-03-31 2015-11-09 本田技研工業株式会社 crankshaft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0527330U (en) * 1991-09-20 1993-04-09 三菱自動車工業株式会社 Crank Shaft Counterweight Shape
JP2015197113A (en) * 2014-03-31 2015-11-09 本田技研工業株式会社 crankshaft

Also Published As

Publication number Publication date
JPS60564B2 (en) 1985-01-09

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