USH885H - Bearing device for a crankshaft - Google Patents

Bearing device for a crankshaft Download PDF

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Publication number
USH885H
USH885H US06/797,199 US79719985A USH885H US H885 H USH885 H US H885H US 79719985 A US79719985 A US 79719985A US H885 H USH885 H US H885H
Authority
US
United States
Prior art keywords
ball
rolling
crankshaft
race
bearing device
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.)
Abandoned
Application number
US06/797,199
Other languages
English (en)
Inventor
Akira Nagashima
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.)
Kioritz Corp
Original Assignee
Kyoritsu Noki 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 Kyoritsu Noki Co Ltd filed Critical Kyoritsu Noki Co Ltd
Application granted granted Critical
Publication of USH885H publication Critical patent/USH885H/en
Abandoned legal-status Critical Current

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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • 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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02—Crankshaft bearings
    • 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
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools

Definitions

  • the present invention relates to a bearing device for a crankshaft, used in a crankcase dividable into two parts to the axial direction of a crankshaft.
  • a crankshaft bearing device which has hitherto been used, is an ordinary ball bearing wherein inner and outer races and balls are assembled integrally with each other.
  • the ball bearing is forcibly inserted into a bearing section of the crankcase involved and fixed therein and, thereafter, a crankshaft is forcibly fitted into the inner race of the ball bearing thus incorporated.
  • the present invention has been accomplished in view of the above-mentioned circumstances and is intended to solve the problems which arise where the above-mentioned ball bearing device is used as a crankshaft bearing device and thus the object of the present invention is to provide a bearing device for crankshaft which is characterized in that the crankcase is dividable into two parts to the axial direction of the crankshaft; and the outer and inner races are separated from each other, whereby the outer race is fitted to the crankcase and the inner race is fitted onto the crankshaft and which makes the assembling of the crankshaft easy and which is arranged so that, at the time of assembling, it may prevent the occurrence of an excessively great stress causing the crankshaft to be deformed.
  • the present invention is constructed such that it comprises an outer race fitted to the bearing section of a crankcase dividable into two parts to the axial direction of a crankshaft and having the rolling balls held by means of a retainer, and an inner race forcibly fitted onto the crankshaft independently from the outer race, and is characterized in that the cross sectional configuration of the ball-rolling groove of the inner race is formed so as to permit the ball-rolling groove to have a radius of curvature greater than the radius of the rolling ball, thereby to provide a clearance between the ball and the groove permitting the rolling ball to be moved from one side to the other side of a central vertical line of the ball received by the outer race.
  • the outer race retaining the rolling balls is fitted to the bearing section of the crankcase dividable into two parts and, on the other hand, the inner race is fitted onto the crankshaft, both side inner and outer races being incorporated as such in the form of separate or independent elements.
  • a press work which is required to be performed in the prior art becomes unnecessary and the assembling operation can be completed simply by separately incorporating beforehand the inner and outer races constituting separate parts or elements and without occurrence of an unnecessary or excessively great stress to the crankshaft or other associated parts or elements.
  • crankshaft not only the assembling of the crankshaft but also the disassembling, repairing, inspection, replacement of parts or elements, etc. can be simply and reliably performed. Namely, no special tool or technique is required for use in the assembling or disassembling operation and anybody can assemble or disassemble anywhere he likes.
  • FIG. 1 is a rear view, partly in section, of a main part of a portable chain saw
  • FIG. 2 is an enlarged sectional view of an inner race, a rolling ball, and an outer race of the bearing device shown in FIG. 1
  • FIG. 3 is a view showing a state of contact of the rolling ball with the inner race, under load, at the point P indicated in FIG. 2.
  • FIG. 1 shows a portable chain saw and more specifically shows a main part, partly in section, of the portable chain saw so as to permit a bearing device for a crankshaft to be seen in the main part.
  • crankcase 1 shown in FIG. 1 is a type which is dividable into two parts rightwards and leftwards along the axis of a crankshaft 2.
  • An inner race 3 is forcibly fitted onto the crankshaft 2, while, on the other hand, an outer race 4 is fitted to, or mounted on, the crankcase 1.
  • rolling balls 5 are retained on the outer race 4 by means of a retainer.
  • FIG. 2 is an enlarged view showing the relationship between the inner race 3, the rolling ball 5 and the outer race 4.
  • the state of contact of the rolling ball 5 with a ball-rolling groove 6 of the inner race 3, under load, at the point P indicated in the figure 2 is the same as in the case of a commercially available ball bearing device used in the prior art.
  • the configuration of the outer race 4 and the ballrolling groove 7 thereof are the same as in the prior art and a description thereof is omitted.
  • the cross sectional configuration of the ball-rolling groove 6 of the inner race 3 is shown in FIG. 2 and the ball-rolling groove 6 is formed to have a curved surface having a radius R of curvature greater than the radius of the rolling ball 5 to thereby provide a clearance between the ball 5 and the groove 6 permitting the rolling ball 5 to be moved from the right side to the left side of a central vertical line V of the ball 5 retainer by the outer race 4.
  • the curved surface of the ballrolling groove 6 in conformity with the radius R of curvature thereof is extended by a distance l and with the clearance ⁇ to allow the ball 5 move to the left from the central vertical line V.
  • Said curved surface has a downwardly inclined surface 8 as well over a range of from the said extended point further toward the left.
  • crankshaft in a simple manner without occurrence of an excessively great stress therein which, at the time of incorporating, causes a deformation of the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
US06/797,199 1983-08-01 1985-11-14 Bearing device for a crankshaft Abandoned USH885H (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58-140711 1983-08-01
JP58140711A JPS6030819A (ja) 1983-08-01 1983-08-01 クランク軸軸受装置

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06634631 Continuation 1984-07-26

Publications (1)

Publication Number Publication Date
USH885H true USH885H (en) 1991-02-05

Family

ID=15274939

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/797,199 Abandoned USH885H (en) 1983-08-01 1985-11-14 Bearing device for a crankshaft

Country Status (4)

Country Link
US (1) USH885H (enExample)
JP (1) JPS6030819A (enExample)
DE (1) DE3427764A1 (enExample)
SE (1) SE458705B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6152605A (en) * 1998-08-25 2000-11-28 Nsk Ltd. Ball bearing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10153018A1 (de) * 2001-10-26 2003-05-08 Ina Schaeffler Kg Kurbelwellenlager

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1023017A (en) * 1908-05-25 1912-04-09 Hess Bright Mfg Co Ball-bearing.
US1307493A (en) * 1919-06-24 hanson
US2230989A (en) * 1938-09-13 1941-02-11 Marlin Rockwell Corp Bearing structure
US3501207A (en) * 1968-04-10 1970-03-17 Phillips Petroleum Co Protection of bearings from impact damage
US3542154A (en) * 1967-03-28 1970-11-24 Bengt O J S Morner Lubricating means for engine-driven chain saws
US3809185A (en) * 1972-10-17 1974-05-07 Kioritz Corp Oil feed pump of chain saw
SE377713B (enExample) * 1971-03-30 1975-07-21 Federal Mogul Corp
SU538165A1 (ru) * 1975-04-16 1976-12-05 Всесоюзный Научно-Исследовательский Конструкторско-Технологический Институт Подшипниковой Промышленности Подшипник качени
US4089570A (en) * 1976-01-31 1978-05-16 Kugelfischer Georg Schafer & Co. Journal bearing with axially split bearing rings
JPS54163404A (en) * 1978-06-15 1979-12-26 Berber Viktor A Liquid transfer apparatus
JPS5714932A (en) * 1980-06-30 1982-01-26 Fujitsu Ltd Memory controlling system
US4382333A (en) * 1980-03-31 1983-05-10 Kioritz Corporation Chain saw

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1307493A (en) * 1919-06-24 hanson
US1023017A (en) * 1908-05-25 1912-04-09 Hess Bright Mfg Co Ball-bearing.
US2230989A (en) * 1938-09-13 1941-02-11 Marlin Rockwell Corp Bearing structure
US3542154A (en) * 1967-03-28 1970-11-24 Bengt O J S Morner Lubricating means for engine-driven chain saws
US3501207A (en) * 1968-04-10 1970-03-17 Phillips Petroleum Co Protection of bearings from impact damage
SE377713B (enExample) * 1971-03-30 1975-07-21 Federal Mogul Corp
US3809185A (en) * 1972-10-17 1974-05-07 Kioritz Corp Oil feed pump of chain saw
SU538165A1 (ru) * 1975-04-16 1976-12-05 Всесоюзный Научно-Исследовательский Конструкторско-Технологический Институт Подшипниковой Промышленности Подшипник качени
US4089570A (en) * 1976-01-31 1978-05-16 Kugelfischer Georg Schafer & Co. Journal bearing with axially split bearing rings
JPS54163404A (en) * 1978-06-15 1979-12-26 Berber Viktor A Liquid transfer apparatus
US4382333A (en) * 1980-03-31 1983-05-10 Kioritz Corporation Chain saw
JPS5714932A (en) * 1980-06-30 1982-01-26 Fujitsu Ltd Memory controlling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6152605A (en) * 1998-08-25 2000-11-28 Nsk Ltd. Ball bearing

Also Published As

Publication number Publication date
DE3427764C2 (enExample) 1987-10-29
SE458705B (sv) 1989-04-24
JPS6030819A (ja) 1985-02-16
DE3427764A1 (de) 1985-02-14
SE8403917D0 (sv) 1984-07-31
SE8403917L (sv) 1985-02-02

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