WO2009000250A2 - Palier linéaire à corps de roulement rotatifs et dispositif de renvoi pour palier linéaire de ce type - Google Patents

Palier linéaire à corps de roulement rotatifs et dispositif de renvoi pour palier linéaire de ce type Download PDF

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Publication number
WO2009000250A2
WO2009000250A2 PCT/DE2008/001036 DE2008001036W WO2009000250A2 WO 2009000250 A2 WO2009000250 A2 WO 2009000250A2 DE 2008001036 W DE2008001036 W DE 2008001036W WO 2009000250 A2 WO2009000250 A2 WO 2009000250A2
Authority
WO
WIPO (PCT)
Prior art keywords
linear bearing
actuator
section
deflector
rolling
Prior art date
Application number
PCT/DE2008/001036
Other languages
German (de)
English (en)
Other versions
WO2009000250A3 (fr
Inventor
Stefan GLÜCK
Original Assignee
Schaeffler Kg
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 Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2009000250A2 publication Critical patent/WO2009000250A2/fr
Publication of WO2009000250A3 publication Critical patent/WO2009000250A3/fr

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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/0602—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly
    • F16C29/0609—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly of the ends of the bearing body or carriage where the rolling elements change direction, e.g. end caps
    • 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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/12—Arrangements for adjusting play

Definitions

  • the invention relates to a linear bearing with rotating rolling elements.
  • Such linear bearings have a straight load-bearing running section and a load-free return section arranged parallel thereto for the rolling elements.
  • Running section and return section are connected by deflectors.
  • the invention relates to linear bearings (also called circulation body) or circulating units for linear guides with unlimited stroke or travel, as found, for example, in the frequently used profiled rail rolling guide with a carriage application.
  • the invention further relates to a deflector for such linear bearings.
  • Linear bearings with rotating rolling elements are used in a wide variety of linear guide units for the realization of large travel distances. Since the rolling elements run here in an endless loop, the travel is limited only by the length of the rail. Depending on the embodiment, balls or rollers are used as rolling elements.
  • the load-bearing parts of such linear bearings are usually made of a rolling steel, the deflector and the return section depending on the load and type often made of plastic or aluminum. The rolling elements, the deflector and the running and return track experienced at the inlet of the rolling elements in the deflector each large loads, which are reflected in the life, bearing capacity and noise of the linear bearing.
  • the rolling elements are pulled down under full load from the running section in the deflector, on the other hand thrown from the deflector in the return section.
  • the deflector deforms under the force applied by the rolling elements. Due to the passive deformation, the deflector swings dynamically around its initial position after deformation. When entering the next rolling element can thus lead to unfavorable situations in which the rolling elements are not ideally braked or accelerated. This increases in particular the wear of the deflector.
  • the invention is therefore based on the object to reduce the extreme load changes in the transition of the rolling elements of the running section in the return channel and when re-steering in the running section and thereby reduce in particular the wear and the noise level in linear bearings.
  • a linear bearing with the features of claim 1.
  • a deflector is proposed in a generic linear bearing, which is provided with an actively deformable portion, wherein an actuator is provided for deformation.
  • an actuator is provided on the deflector, which has a flexible tongue as a deformable portion.
  • a flexible tongue as a deformable portion.
  • two separate actuators can be used at the deflector, one of which is effective at the inlet and one at the outlet of the deflector.
  • the actuator is in a preferred embodiment, a piezoelectric actuator element.
  • a bimorph actuator bending element
  • a bimorph is composed of two thin plates of a piezoelectric material (transverse stretching elements), between which a metal layer is arranged as a central electrode. If a voltage is applied between the central electrode and the outer electrode, one plate becomes longer due to the reverse polarization, while the other one is shortened. This causes a bending deflection.
  • Bending transducers are available in different versions (also monomorphic and multimorphic) and can be dimensioned and selected by the specialist depending on the application.
  • the actuator may also be formed by an electroactive polymer.
  • the linear bearing preferably further comprises at least one sensor, which is arranged, for example, in the return section and / or in the running section shortly before the inlet of the rolling element in the deflector and provides a signal for deformation of the actuator.
  • the correct point in time for activation of the actuator can also be determined, for example, from the determination of the running speed of the rolling elements, taking into account the parameters of the linear bearing.
  • the actuator itself can be used as a sensor by detecting an incipient deformation caused by the rolling-element inlet and thus the actuator can be actuated in the correct time.
  • the actuation of the actuator is designed in a further preferred embodiment so that the tongue of the deflector is calmed down again so quickly that the occurring and normally longer-lasting oscillation is already subsided until contact with the next rolling element.
  • the actuator after the rolling element contact stiffen the tongue or actively create a counter-vibration for reassurance.
  • a suitable drive circuit is provided.
  • a further modified embodiment of the invention proposes a self-sufficient solution in which the energy delivered by the rolling element to the deflector is used to activate the deflector at the other end of the running section, without an external power supply being necessary.
  • a generator element is arranged at the inlet of the rolling elements in the first deflector, which generates energy by deformation, which is used for in-phase control of the actuator on the opposite Umlenker when lifting the rolling elements of the barrel section.
  • piezoelectric ceramic components or electroactive polymers can be used here, which can act as generator and actuator.
  • Piezoelectric ceramic devices are electromechanical transducer components. These are able to convert mechanical forces such as pressure, strain or acceleration into an electrical voltage or charges and to convert an electrical voltage into mechanical motion or vibrations.
  • FIG. 2 shows three views of a deflector according to the invention in a schematic representation
  • FIG. 3 shows a detail of a linear bearing in a schematic sectional illustration on a first deflector
  • Fig. 4 a second deflector on the linear bearing according to FIG. 3 in a schematic sectional view.
  • Fig. 1 shows a known from the prior art profiled rail Wälz Unit in a partially sectioned view.
  • a carriage 01 is guided on a straight extending rail 02.
  • four linear bearings 03 are arranged with rotating rolling elements 04 such that upon a movement of the carriage 01, the rolling elements 04 along tracks 06, which are incorporated in the rail 01, roll.
  • the linear bearing 03 comprises a load-bearing running section 07 and a roller circulation channel, which is composed of a first deflector 08, a second deflector 09 (in the uncut area of the illustration) and a load-free return section 11.
  • a deflector 12 of a linear bearing according to the invention which according to the invention replaces the first and second deflectors in the linear bearing 03.
  • Fig. A) shows a schematic side view
  • Fig b) and c) is a sectional view of the deflector 12 according to the invention.
  • the deflector 12 according to the invention shown in Fig. A) of FIG. 2 comprises a tongue 13 and a deflection channel 14 through which the rolling elements 04 are supplied to the return section 11 and the running section 07, respectively.
  • the deflector 12 has a lubricating opening 16, through which a lubricant can be supplied to the linear bearing. For lubricant-free bearings this opening can of course be omitted.
  • an actuator 17 is shown in the sectional view, which is integrated in the tongue 13 and is mounted outside of the deflection channel 14 at this.
  • the actuator 17 is preferably a piezoelectric actuator (Bimorph).
  • the actuator 17 is able to cause a corresponding movement of a movement 18 of the tongue 13, as indicated by the movement arrow 18 and the dashed lines.
  • the movement of the tongue 13 takes place substantially in the direction of the adjacent running section 07, so that the tongue 13 can escape a rolling body entering the deflector by a predetermined amount or can follow a rolling body running out of the deflector.
  • Fig. 3 shows a detail of a linear bearing according to the invention at the outlet of the rolling elements from the running section in the deflector.
  • the linear bearing is attached to a carriage, not shown, which is moved in the direction of the movement arrow 19 along the rail 02.
  • the rolling elements 04 roll between the running section 07 of the linear bearing and the track 06 of the rail 02 to the deflector 12 and are lifted from the tongue 07 of the track 07.
  • the actuator 17 actively brings about a deformation 21 in order to intercept the rolling element 04 more efficiently, ie to give way to its movement by a predetermined amount. Subsequently, the rolling elements is deflected by the deflection channel 14 in the return section 11.
  • FIG. 4 shows, in a schematic sectional illustration, the inlet of the rolling elements 04 from the return section 11 into the running section 07.
  • the carriage also moves in the direction of the movement arrow 19.
  • the inlet of the rolling elements 04 can be optimized with a linear bearing according to the invention.
  • the rolling element 04 is deflected from the return section 11 through the deflection channel 14 between the running section 07 of the linear bearing and the track 06 of the rail 02 and thereby supported by a deformation 22 of the tongue 13 in the direction of the running section 07 by the actuator 14 at the required acceleration.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne un palier linéaire muni de corps de roulement (04) rotatifs, présentant une section de roulement (07) rectiligne portante, une section de retour (11) rectiligne exempte de charge, agencée parallèlement à la précédente et deux dispositifs de renvoi (12) qui sont montés entre la section de roulement et la section de retour et guident le mouvement des corps de roulement (14) entre les sections de roulement (07, 11) dans un canal de renvoi (14), de sorte à permettre une révolution continue des corps de roulement (04). Selon l'invention, au moins un des deux dispositifs de renvoi (12) présente une section pouvant être déformée de manière active par un actionneur (17), ce qui a pour effet d'influer sur le mouvement des corps de roulement (04) aux passages situés entre les dispositifs de renvoi (12) et la section de roulement portante. L'invention permet d'augmenter la durée de vie et de minimiser le niveau sonore de tels paliers.
PCT/DE2008/001036 2007-06-28 2008-06-21 Palier linéaire à corps de roulement rotatifs et dispositif de renvoi pour palier linéaire de ce type WO2009000250A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710030004 DE102007030004A1 (de) 2007-06-28 2007-06-28 Linearlager mit umlaufenden Wälzkörpern und Umlenker für ein solches Linearlager
DE102007030004.4 2007-06-28

Publications (2)

Publication Number Publication Date
WO2009000250A2 true WO2009000250A2 (fr) 2008-12-31
WO2009000250A3 WO2009000250A3 (fr) 2009-05-07

Family

ID=39948058

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/001036 WO2009000250A2 (fr) 2007-06-28 2008-06-21 Palier linéaire à corps de roulement rotatifs et dispositif de renvoi pour palier linéaire de ce type

Country Status (2)

Country Link
DE (1) DE102007030004A1 (fr)
WO (1) WO2009000250A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434585A (zh) * 2011-11-10 2012-05-02 宁波恒力汽配轴承有限公司 一种直线轴承滑动机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3023978A1 (de) * 1980-06-26 1982-01-14 Franke & Heydrich Kg Waelzlager zur laengsbeweglichen lagerung von aneinander gefuehrten teilen, insbesondere maschinenelementen
EP0846880A1 (fr) * 1996-06-27 1998-06-10 Thk Co. Ltd. Guide a glissieres faisant appel a une chaine a rouleaux comportant des extremites
US20070003172A1 (en) * 2003-08-25 2007-01-04 Nsk Ltd. Linear guiding device
WO2007063770A1 (fr) * 2005-11-30 2007-06-07 Coo Space Co., Ltd. Dispositif de roulement, son procede de fabrication et son procede d’utilisation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3023978A1 (de) * 1980-06-26 1982-01-14 Franke & Heydrich Kg Waelzlager zur laengsbeweglichen lagerung von aneinander gefuehrten teilen, insbesondere maschinenelementen
EP0846880A1 (fr) * 1996-06-27 1998-06-10 Thk Co. Ltd. Guide a glissieres faisant appel a une chaine a rouleaux comportant des extremites
US20070003172A1 (en) * 2003-08-25 2007-01-04 Nsk Ltd. Linear guiding device
WO2007063770A1 (fr) * 2005-11-30 2007-06-07 Coo Space Co., Ltd. Dispositif de roulement, son procede de fabrication et son procede d’utilisation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434585A (zh) * 2011-11-10 2012-05-02 宁波恒力汽配轴承有限公司 一种直线轴承滑动机构
CN102434585B (zh) * 2011-11-10 2014-10-29 宁波恒力汽配轴承有限公司 一种直线轴承滑动机构

Also Published As

Publication number Publication date
DE102007030004A1 (de) 2009-01-02
WO2009000250A3 (fr) 2009-05-07

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