US20100303399A1 - Rolling Bearing - Google Patents

Rolling Bearing Download PDF

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Publication number
US20100303399A1
US20100303399A1 US12/738,541 US73854108A US2010303399A1 US 20100303399 A1 US20100303399 A1 US 20100303399A1 US 73854108 A US73854108 A US 73854108A US 2010303399 A1 US2010303399 A1 US 2010303399A1
Authority
US
United States
Prior art keywords
track
roller bearing
bearing according
track base
shoulders
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
US12/738,541
Other languages
English (en)
Inventor
Mathias Nöth
Tristan Kaiser
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.)
SKF AB
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to AKTIEBOLAGET SKF reassignment AKTIEBOLAGET SKF ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAISER, TRISTAN, NOTH, MATHIAS
Publication of US20100303399A1 publication Critical patent/US20100303399A1/en
Priority to US15/873,735 priority Critical patent/US10670072B2/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • 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
    • F16C19/50—Other types of ball or roller bearings
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/331—Use of bearings
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/50—Hand tools, workshop equipment or manipulators

Definitions

  • the invention relates to a roller bearing for at least one set of roller bodies, which are disposed in an annular manner, the roller bearing having at least one track element with a track, on which the roller bodies are provided to roll.
  • a ball bearing assembly for a wobble gearing is known from DE 34 00 679 A1, in which a so-to-speak normal grooved ball bearing is utilized, wherein only the bore of the bearing inner ring is formed in an inclined manner relative to an outer surface of the ball bearing inner ring.
  • An object of the present invention is to provide an improved roller bearing as compared to that.
  • a roller bearing for at least one set of roller bodies which are disposed in an annular manner, the roller bearing having at least one track element with a track, on which the roller bodies are provided for rolling, includes the following features:
  • the invention is based on the recognition that, in a ball bearing arrangement according to the above-described DE 34 00 679 A1 for the typical case of a wobble gear, wherein a force is to be transferred in the axial direction, in particular, at one circumferential point of the outer ring of the ball bearing arrangement, the design of the two track elements with a track base and shoulders being concentric to each other is suboptimal, because the application of force on the shoulder portions, in particular, is quite variable depending on the rotational position of the ball bearing arrangement, with reference to said force transfer point.
  • the track element is designed such that all center points of the three circumferential lines are different from each other, as viewed perpendicular to the planes defined by the circumferential lines of the track base and the shoulders and/or the rim, i.e., the circumferential lines are, so to speak, eccentric to each other.
  • the present invention not only slightly-improved, but significantly longer lifetimes of the roller bearing can be achieved for comparable installation space utilization and comparable load situations like in the state of the art, which amounts to a quantum leap in the roller bearing field.
  • the FIGURE shows a longitudinal section through a roller bearing according to the invention.
  • the roller bearing comprises an inner track element 10 and an outer track element 20 , between which are disposed a set of roller bodies that are formed as balls 30 and are disposed in an annular manner, wherein the balls 30 can be disposed in a not-illustrated cage.
  • the inner track element 10 is formed such that, in one rotation of the inner track element about the rotational axis 5 , the plane defined by a circumferential line of a track base 15 for the balls 30 performs a rocking motion about said rotational axis 5 .
  • This rocking motion is correspondingly transferred to the outer track element 20 .
  • a pin 28 is disposed at a circumferential point on the outer surface of the outer track element 20 by friction welding, with which the reciprocation of the pin 28 in the direction of the rotational axis 5 caused by said rocking motion is transferred to another structural element, e.g., in the context of a hammer drill or a chisel hammer
  • friction welding the pin 28 onto the outer surface of the outer track element 20 expensive manufacturing methods, for example cutting out the pin 28 , are advantageously avoided.
  • Both track elements 10 and 20 are formed with a track base 15 and 25 for the balls 30 and with shoulders 14 and 16 as well as 24 and 26 disposed on both sides of the track base 15 and 25 .
  • the circular circumferential lines of the track base 15 and 25 as well as the two shoulders 14 , 16 and 24 , 26 , respectively, all center points of the three circumferential lines are different from each other as viewed perpendicular to the parallel-to-each-other planes defined by the circumferential lines.
  • the forces in the axial direction occurring during the rocking motion are absorbed and transferred by an always sufficiently-high dimensioned shoulder portion of the track elements 10 and 20 .
  • a maximal inclination of the track base 15 of the inner track element 10 is illustrated.
  • the two shoulders 14 and 16 of the inner track element 10 are formed such that their circumferential lines reach this maximal inclination earlier or later, e.g., by 10° in an advanced or lagging manner, wherein this depends on the particular operating conditions of the roller bearing.
  • the advancing or lagging can also be greater or less than 10° or the track elements can also be formed such that the track base and the shoulders reach said maximal inclination at the same time. It is important, however, that the force demand profile, which is predetermined by the installation environment and the intended usage, is dependent on the rotational position of the roller bearing.
  • the outer track element 20 is constructed in a manner corresponding to the inner.
  • the particulars of the advancing and lagging of the shoulders 24 and 26 which was previously described for the inner track element 10 , can be described in a more simple manner in that the center points of the circumferential lines of both shoulders 24 and 26 lie offset relative to a straight line that extends through the center point of the circumferential line of the track base 25 of the outer track element 20 and the connection point of the pin 28 .
  • the track elements 10 and 20 are, in particular, made of a case-hardened steel having a relatively high nickel content.
  • the inner track element 10 can also be formed, e.g., in two pieces, in that the track base 15 and the shoulder 14 and 16 are formed similar to the outer track element 20 and it is then installed in an appropriate manner in a second piece.
  • roller bearing Summarized in a catch phrase manner, one can also describe the above-described roller bearing as a three-point-optimized wobble bearing.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Rolls And Other Rotary Bodies (AREA)
US12/738,541 2007-10-16 2008-10-13 Rolling Bearing Abandoned US20100303399A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/873,735 US10670072B2 (en) 2007-10-16 2018-01-17 Rolling bearing

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007046738.7 2007-10-16
DE102007049738A DE102007049738B3 (de) 2007-10-16 2007-10-16 Wälzlagerung
PCT/EP2008/008640 WO2009049843A2 (de) 2007-10-16 2008-10-13 Wälzlagerung

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/008640 A-371-Of-International WO2009049843A2 (de) 2007-10-16 2008-10-13 Wälzlagerung

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/873,735 Continuation-In-Part US10670072B2 (en) 2007-10-16 2018-01-17 Rolling bearing

Publications (1)

Publication Number Publication Date
US20100303399A1 true US20100303399A1 (en) 2010-12-02

Family

ID=40031066

Family Applications (2)

Application Number Title Priority Date Filing Date
US12/738,541 Abandoned US20100303399A1 (en) 2007-10-16 2008-10-13 Rolling Bearing
US15/873,735 Active 2028-12-19 US10670072B2 (en) 2007-10-16 2018-01-17 Rolling bearing

Family Applications After (1)

Application Number Title Priority Date Filing Date
US15/873,735 Active 2028-12-19 US10670072B2 (en) 2007-10-16 2018-01-17 Rolling bearing

Country Status (7)

Country Link
US (2) US20100303399A1 (es)
EP (1) EP2209594B1 (es)
CN (1) CN101888917B (es)
AT (1) ATE494992T1 (es)
DE (2) DE102007049738B3 (es)
ES (1) ES2359191T3 (es)
WO (1) WO2009049843A2 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110194796A1 (en) * 2010-02-05 2011-08-11 Schaeffler Technologies Gmbh & Co. Kg Angled Bore Bearing

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009017750B4 (de) * 2009-04-16 2011-02-10 Aktiebolaget Skf Taumellageranordnung
CN102518661A (zh) * 2011-11-30 2012-06-27 新昌县新凌凯博机械有限公司 振动机械的专用轴承
CN105782235B (zh) * 2014-12-24 2019-11-29 舍弗勒技术有限两合公司 振动轴承
CN106090025B (zh) * 2016-07-12 2018-08-31 江苏万达特种轴承有限公司 内圈孔轴线与滚道运动轨迹不垂直的内圈加工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558201A (en) * 1968-09-10 1971-01-26 Torrington Co Unit preloaded roller bearing
US4487272A (en) * 1982-02-13 1984-12-11 Robert Bosch Gmbh Impacting drill
US4603923A (en) * 1984-01-11 1986-08-05 Ina Walzlager Schaeffler Kg Inner race for a swashplate mechanism
US7404451B2 (en) * 2005-04-25 2008-07-29 Hilti Aktiengesellschaft Wobble device for a hand-held power tool and a hand-held power tool with the wobble device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3400679A1 (de) 1984-01-11 1985-07-18 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Innenring fuer ein taumelgetriebe
DE3400634C1 (de) * 1984-01-11 1985-01-31 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Innenring für ein Taumelgetriebe
DE4239294A1 (de) * 1992-11-23 1994-05-26 Black & Decker Inc Bohrhammer mit pneumatischem Schlagwerk
DE102005036228A1 (de) * 2005-08-02 2007-02-08 Schaeffler Kg Taumelscheibengetriebe, insbesondere für eine Axialkolbenpumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558201A (en) * 1968-09-10 1971-01-26 Torrington Co Unit preloaded roller bearing
US4487272A (en) * 1982-02-13 1984-12-11 Robert Bosch Gmbh Impacting drill
US4603923A (en) * 1984-01-11 1986-08-05 Ina Walzlager Schaeffler Kg Inner race for a swashplate mechanism
US7404451B2 (en) * 2005-04-25 2008-07-29 Hilti Aktiengesellschaft Wobble device for a hand-held power tool and a hand-held power tool with the wobble device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Translation of EP 1750010, obtained 8/7/2014. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110194796A1 (en) * 2010-02-05 2011-08-11 Schaeffler Technologies Gmbh & Co. Kg Angled Bore Bearing

Also Published As

Publication number Publication date
WO2009049843A3 (de) 2009-09-03
DE502008002348D1 (de) 2011-02-24
ES2359191T3 (es) 2011-05-19
ATE494992T1 (de) 2011-01-15
US10670072B2 (en) 2020-06-02
CN101888917B (zh) 2013-09-04
EP2209594B1 (de) 2011-01-12
EP2209594A2 (de) 2010-07-28
WO2009049843A2 (de) 2009-04-23
US20180142730A1 (en) 2018-05-24
DE102007049738B3 (de) 2008-12-24
CN101888917A (zh) 2010-11-17

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AKTIEBOLAGET SKF, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NOTH, MATHIAS;KAISER, TRISTAN;REEL/FRAME:024848/0814

Effective date: 20100716

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION