JPS5751042A - 120(degrees) crankshaft for internal-combustion engine - Google Patents

120(degrees) crankshaft for internal-combustion engine

Info

Publication number
JPS5751042A
JPS5751042A JP12648380A JP12648380A JPS5751042A JP S5751042 A JPS5751042 A JP S5751042A JP 12648380 A JP12648380 A JP 12648380A JP 12648380 A JP12648380 A JP 12648380A JP S5751042 A JPS5751042 A JP S5751042A
Authority
JP
Japan
Prior art keywords
balance
journal part
weights
loads
sides
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
JP12648380A
Other languages
Japanese (ja)
Inventor
Tadaaki Sugihara
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 JP12648380A priority Critical patent/JPS5751042A/en
Publication of JPS5751042A publication Critical patent/JPS5751042A/en
Pending legal-status Critical Current

Links

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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
    • F16F15/283—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same for engine crankshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1824—Number of cylinders six

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

PURPOSE:To prevent an unbalanced moment from exerting on a main bearing and reduce the weight of balance weights by a method wherein the parts on both sides of a journal part where the crankarms are at 120 deg. from each other are fitted with blance weights which have a total weight of one half of that used in the case of fitting on the 180 deg. opposite side. CONSTITUTION:Six crank pins 121-126 are provided at positions trisecting the circumference of a 120 deg. crankshaft 11, and the crank arms 131-1312 on both sides of each pin are fitted with balance weights 141-1412, respectively. Referring to the balance of the second journal part 152, the loads exerted on the journal part are the half L of the load on the pin side exerted through the arms 132, 133 on both sides of the journal part and the loads due to the weights w of the balance weight 142, 143, and the directions of the loads are such that the directions of the arms 132, 133 and the balance weifht trisect the circumference of the journal part. Accordingly, the loads exerted by unbalanced moments on the main bearings 161-167 are equal, and the total weight of the balance weights is 4W+8w=8W, namely, the total weight is reduced to 2/3 of that in the conventional design.
JP12648380A 1980-09-10 1980-09-10 120(degrees) crankshaft for internal-combustion engine Pending JPS5751042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12648380A JPS5751042A (en) 1980-09-10 1980-09-10 120(degrees) crankshaft for internal-combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12648380A JPS5751042A (en) 1980-09-10 1980-09-10 120(degrees) crankshaft for internal-combustion engine

Publications (1)

Publication Number Publication Date
JPS5751042A true JPS5751042A (en) 1982-03-25

Family

ID=14936320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12648380A Pending JPS5751042A (en) 1980-09-10 1980-09-10 120(degrees) crankshaft for internal-combustion engine

Country Status (1)

Country Link
JP (1) JPS5751042A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0266747U (en) * 1988-11-02 1990-05-21
KR20030050113A (en) * 2001-12-18 2003-06-25 현대자동차주식회사 Balancing device of engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531335A (en) * 1978-08-28 1980-03-05 Fujitsu Ltd Pulse addition system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531335A (en) * 1978-08-28 1980-03-05 Fujitsu Ltd Pulse addition system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0266747U (en) * 1988-11-02 1990-05-21
KR20030050113A (en) * 2001-12-18 2003-06-25 현대자동차주식회사 Balancing device of engine

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