EP2567111A1 - Palier excentrique - Google Patents

Palier excentrique

Info

Publication number
EP2567111A1
EP2567111A1 EP11709092A EP11709092A EP2567111A1 EP 2567111 A1 EP2567111 A1 EP 2567111A1 EP 11709092 A EP11709092 A EP 11709092A EP 11709092 A EP11709092 A EP 11709092A EP 2567111 A1 EP2567111 A1 EP 2567111A1
Authority
EP
European Patent Office
Prior art keywords
shaft
bearing ring
eccentric
bearing
rolling elements
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.)
Withdrawn
Application number
EP11709092A
Other languages
German (de)
English (en)
Inventor
Juergen Haecker
Norbert Alaze
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2567111A1 publication Critical patent/EP2567111A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
    • 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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/10—Bearings, parts of which are eccentrically adjustable with respect to each other
    • 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
    • F16C3/22—Cranks; Eccentrics
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4694—Single-split roller or needle cages
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • 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
    • F16C33/38—Ball cages
    • F16C33/3887—Details of individual pockets, e.g. shape or ball retaining means

Definitions

  • the invention relates to an eccentric bearing with the features of the preamble of claim 1.
  • the eccentric bearing according to the invention is provided in particular for an electro-hydraulic piston pump unit of a hydraulic brake system of a motor vehicle. Such pump units are used to generate a hydraulic brake pressure to a brake actuation in slip-controlled and / or power brake systems.
  • eccentric bearings have an eccentric shaft which is integrally or otherwise mounted rigidly and eccentrically on a motor shaft of an electric motor or on an output shaft of a transmission which is drivable with the electric motor.
  • a rolling bearing with the eccentric shaft concentrically enclosing bearing ring and arranged with rolling elements, which are arranged in a gap between the eccentric shaft and the bearing ring around the shaft, but usually not necessarily equidistant.
  • the rolling elements are usually rollers or needles, but it can also be other rolling elements, such as balls.
  • the bearing ring can be considered as an outer ring, an inner ring may be present, for example, be pressed onto the eccentric shaft. However, no inner ring is necessary, the rolling elements can also roll directly on the eccentric shaft.
  • On the outside of the bearing ring are one or more pump pistons of the pump piston unit with their front ends. The pump pistons are pressed, for example with springs from the outside in contact with the bearing ring.
  • the eccentric shaft In the case of a rotary drive, the eccentric shaft, due to its eccentricity, executes a movement on a circular path and thereby revolves around itself. Because of the movement of the eccentric shaft on the circular path, the bearing ring also moves on one or the same circular path and thereby drives the pump pistons abutting on it to the desired lifting movement in order to convey brake fluid or generally fluid by alternating suction and displacement, such as it is known from piston pumps. Because of his
  • the bearing ring does not rotate with the eccentric shaft.
  • the eccentric bearings convert a rotary motion of an electric motor or an output shaft of a transmission into a lifting movement for driving the pump pistons.
  • the eccentric bearing according to the invention with the features of claim 1 has a rotationally driven shaft on which a roller bearing is arranged with a bearing ring enclosing the shaft and arranged in a gap between the shaft and the bearing ring around the shaft rolling elements, wherein the rolling elements equidistant can be arranged, but not need.
  • a Wälz stressesmaschinefig keeps the rolling elements in their distances from each other, wherein the distances of the rolling elements may be the same or different.
  • the shaft of the eccentric bearing according to the invention is provided concentrically to its axis of rotation, although conceivable and is not excluded from the invention that the shaft is eccentric to its axis of rotation.
  • the rolling elements are eccentric to the shaft and the rolling elements have different diameters according to a different gap width between the shaft and the bearing ring due to the eccentricity of the bearing ring to the shaft.
  • the rolling elements have diameters which are as great as the width of the gap between the bearing ring and the shaft at the circumferential location at which the respective rolling element is located.
  • the rolling elements run around the shaft at a lower rotational speed than the rotational speed of the shaft, as well as the speed with which the bearing ring moves in the circular path decreases.
  • the eccentric bearing according to the invention has a speed reduction, a rotational speed of the eccentricity of the bearing ring is slower than the rotational speed of the shaft with a non-rotatable bearing ring.
  • the speed reduction has the advantage that a drive with higher speed is possible, which allows for the same power the use of a smaller and lighter electric motor.
  • the eccentric bearing according to the invention is its simple and inexpensive construction.
  • the eccentric bearing according to the invention is provided in particular for the explained use in an electro-hydraulic piston pump unit for generating a brake pressure in a hydraulic brake system of a motor vehicle, where it converts the rotary motion of an electric motor into a stroke movement for driving pump piston.
  • the invention is not limited to this use but is also directed to the eccentric bearing as such.
  • the WälzSystem hofig is resilient (claim 2), it acts on the rolling elements inwardly against the shaft, outwardly against the bearing ring and / or in the circumferential direction.
  • Claim 4 provides that the WälzMechkafig acts on the rolling elements in the direction of the narrowing gap between the shaft and the bearing ring.
  • the rolling elements are subjected to a bias against the shaft, the bearing ring or when exposed to the narrowing gap against both the shaft and against the bearing ring. Even if the bias voltage is low, this embodiment of the invention ensures that the rolling elements roll on the shaft and in the bearing ring and thereby circulate around the shaft like the planetary gears of a planetary gear when the shaft (or the bearing ring) is driven to rotate. The circulation of the rolling elements around the shaft ensures the desired movement of the bearing ring on the circular path around the shaft.
  • the single FIGURE shows an inventive eccentric bearing in front view.
  • the eccentric bearing 1 according to the invention shown in the drawing has a shaft 2 which is enclosed by a bearing ring 3.
  • rollers 5 are arranged as rolling elements around the shaft 2 around.
  • the bearing ring 3 and the rollers 5 can possibly be considered together with the shaft 2 as rolling bearings.
  • the shaft 2 is located with a not visible in the drawing because behind the plane Electric motor rotating about its axis 6, which is also its axis of rotation, driven.
  • the shaft 2 has no eccentricity. For example, it may be the end of a motor shaft of the electric motor.
  • the bearing ring 3 is eccentric to the shaft 2, a width of the gap 4 between the bearing ring 3 and the shaft 2 changes in the circumferential direction. Starting from a largest gap width, which is the upper right in the drawing, the gap width decreases in both circumferential directions to a smallest gap width, which is opposite to the largest gap width, in the drawing so bottom left.
  • the rollers 5, which form the rolling elements, have different diameters corresponding to the different gap width.
  • the diameters of the rollers 5 are each as large as the gap 4 between the bearing ring 3 and the shaft 2 is wide at the point at which the respective roller 5 is located.
  • the bearing ring 3 moves in a circular path about the axis 6 of the shaft 2, which is also its axis of rotation, wherein a speed of the circular movement of the bearing ring 3 is smaller than the rotational speed of the shaft 2, so there is a speed reduction instead.
  • the rollers 5 are received in a rolling element cage 7, which holds them in their distance from each other. Between the two rollers 5 with the largest diameters of the rolling element cage 7 is open and designed resilient in this way, comparable to a locking ring, as it is known for example as a snap ring or as a snap ring in mechanical engineering.
  • the rolling element cage 7 has a bias voltage, it acts on the two rollers 5 with the largest diameters in the circumferential direction away from each other as shown by the arrows 8.
  • By its bias of the WälzMechkorfig 7 acts on the rollers 5 in both circumferential directions in the direction of the narrowing gap 4 between see the shaft 2 and the bearing ring 3.
  • rollers 5 are rotatably received in rectangular recesses, so-called. Bags, the WälzSystemkarfigs 7.
  • rolling element cages 7 are known from Wälzla- like, they are also referred to as bearing cages or just as cages.
  • roller bearings the roller bearing cages are also referred to as roller cages, ball bearings as ball cages.
  • pump pistons 9 are in contact with the bearing rings 3 with their front ends.
  • the pump pistons 9, of which only front ends are shown in the drawing, are arranged radially to the shaft 2 and are pressed by non-illustrated piston springs from the outside against the bearing ring 3.
  • the pump piston 9 are axially displaceable in pump bores 10 of a pump housing 1 1, that is received radially displaceable to the shaft 2.
  • the eccentric bearing 1 is located in a cylindrical eccentric 12 of the pump housing 1 1 between the two pump piston 9, which are arranged opposite each other in the embodiment, ie in a boxer arrangement.
  • the bearing ring 3 By rotating drive of the shaft 2, the bearing ring 3 moves, without rotating with the shaft 2, at a lower speed than the rotational speed of the shaft 2 on a circular path about the axis 6 and axis of rotation of the shaft 2.
  • the circular motion of the bearing ring 3 drives the pump piston 9 to a lifting movement.
  • the pump housing 1 1 is part of a so-called. Hydraulic block, in which except the pump piston 9 further, not shown hydraulic components such as solenoid valves of a slip control device for a hydraulic brake system a motor vehicle and arranged hydraulically interconnected. Such hydraulic blocks are known per se and will not be explained further here.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne un palier excentrique (1) destiné à un groupe motopompe à pistons électrohydraulique d'un système de freinage de véhicule. Selon l'invention, ce palier excentrique présente un arbre (2) pouvant être entraîné en rotation autour de son axe (6), une bague de palier (3), excentrée par rapport à l'arbre (2), et des corps de roulement (5) placés entre la bague de palier (3) et l'arbre (2), présentant des diamètres différents en fonction des différentes largeurs d'un espace (4) entre la bague de palier (3) et l'arbre (2). Lorsque l'arbre (2) est entraîné en rotation, la bague de palier (3) tourne de manière excentrée autour de l'arbre (2) à une vitesse correspondant à la moitié de la vitesse de rotation de l'arbre (2) et entraîne des pistons de pompe (9) prenant appui à l'extérieur sur la bague de palier (3) de sorte qu'ils effectuent un mouvement alternatif. Une cage de corps de roulement (7), ouverte entre les deux corps de roulement (5) présentant les diamètres les plus importants, sollicite les corps de roulement (5) de sorte qu'ils pénètrent dans l'espace (4), qui se rétrécit, entre la bague de palier (3) et l'arbre (2) et assure ainsi que les corps de roulement (5) tournent sur l'arbre (2) lorsque ce dernier est entraîné.
EP11709092A 2010-05-05 2011-03-10 Palier excentrique Withdrawn EP2567111A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028581A DE102010028581A1 (de) 2010-05-05 2010-05-05 Exzenterlager
PCT/EP2011/053582 WO2011138073A1 (fr) 2010-05-05 2011-03-10 Palier excentrique

Publications (1)

Publication Number Publication Date
EP2567111A1 true EP2567111A1 (fr) 2013-03-13

Family

ID=44021803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11709092A Withdrawn EP2567111A1 (fr) 2010-05-05 2011-03-10 Palier excentrique

Country Status (6)

Country Link
US (1) US8950942B2 (fr)
EP (1) EP2567111A1 (fr)
JP (1) JP2013525710A (fr)
CN (1) CN102884327B (fr)
DE (1) DE102010028581A1 (fr)
WO (1) WO2011138073A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9175535B2 (en) * 2011-09-29 2015-11-03 Coil Solutions, Inc. Propulsion generator and method
DE102012210704A1 (de) 2012-06-25 2014-01-02 Robert Bosch Gmbh Exzenterwälzlager
CN104930061A (zh) * 2015-05-28 2015-09-23 江苏万达特种轴承有限公司 一种表面镀镍环状开口式回转支承保持架及其加工工艺
CN105156481B (zh) * 2015-09-07 2018-02-16 大连理工大学 一种精密定位用偏心密珠轴套
DE102018110925A1 (de) * 2018-05-07 2019-11-07 Liebherr-Components Biberach Gmbh Stellantrieb zum Verstellen eines Großwälzlagers
CN113202853A (zh) * 2021-05-25 2021-08-03 钟永先 具有减速功能的偏心轴承及有其的减速机
CN114001095B (zh) * 2021-11-09 2022-10-21 华南理工大学 一种能支撑轴做行星运动的复合滚动轴承

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1947703A (en) * 1931-05-25 1934-02-20 Free Wheeling Patents Corp Roller clutch
US2029244A (en) * 1932-11-26 1936-01-28 Eclipse Aviat Corp Driving mechanism
US2931249A (en) * 1955-03-21 1960-04-05 United Shoe Machinery Corp Strain wave gearing-bearing variable elements
US3038767A (en) * 1959-03-04 1962-06-12 Parkersburg Aetna Corp Roller bearing with undulated retainer
FR1458984A (fr) * 1965-07-01 1966-04-29 Nadella Perfectionnement aux roulements radiaux comportant une cage segmentée
JPS5171443A (ja) * 1974-12-19 1976-06-21 Masao Yamamoto Kumitsukeyoinakorogarijikuke
JPS56147927A (en) 1980-04-15 1981-11-17 Koyo Seiko Co Ltd Self-aligned clutch release bearing
JPS58189815U (ja) 1982-06-11 1983-12-16 藤原　純郎 印刷装置
JPS61215480A (ja) * 1985-03-20 1986-09-25 Matsushita Refrig Co スクロ−ル型圧縮機
US4776708A (en) * 1987-07-17 1988-10-11 Quincy Technologies, Inc. Extended contact variable ball planetary type wave generator
US5111712A (en) * 1988-10-06 1992-05-12 Carrier Corporation Rolling element radial compliancy mechanism
JP3245779B2 (ja) * 1991-12-24 2002-01-15 カシオ計算機株式会社 窒化シリコン膜の成膜方法
JPH0587327U (ja) 1992-04-30 1993-11-26 エヌティエヌ株式会社 高トルク転がり軸受
DE19503621A1 (de) * 1995-02-03 1996-08-08 Bosch Gmbh Robert Hubkolbenpumpe
DE102004061812A1 (de) * 2004-12-22 2006-07-06 Robert Bosch Gmbh Antriebsvorrichtung
DE102006010680A1 (de) * 2005-11-21 2007-05-24 Continental Teves Ag & Co. Ohg Radialkolbenpumpe
JP4342512B2 (ja) 2005-12-21 2009-10-14 Ｎｔｎ株式会社 転がり軸受、保持器セグメントおよび風力発電機の主軸支持構造
US20070223854A1 (en) * 2006-03-20 2007-09-27 Jtekt Corporation Split roller bearing device
JP4941310B2 (ja) * 2008-01-09 2012-05-30 株式会社ジェイテクト 軸受構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011138073A1 *

Also Published As

Publication number Publication date
US20130195390A1 (en) 2013-08-01
WO2011138073A1 (fr) 2011-11-10
JP2013525710A (ja) 2013-06-20
US8950942B2 (en) 2015-02-10
CN102884327A (zh) 2013-01-16
DE102010028581A1 (de) 2011-11-10
CN102884327B (zh) 2015-05-20

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