EP1843873A2 - Palier a roulement lineaire avec moyen d'essuyage en forme de u placé de front - Google Patents

Palier a roulement lineaire avec moyen d'essuyage en forme de u placé de front

Info

Publication number
EP1843873A2
EP1843873A2 EP05817996A EP05817996A EP1843873A2 EP 1843873 A2 EP1843873 A2 EP 1843873A2 EP 05817996 A EP05817996 A EP 05817996A EP 05817996 A EP05817996 A EP 05817996A EP 1843873 A2 EP1843873 A2 EP 1843873A2
Authority
EP
European Patent Office
Prior art keywords
guide rail
scraper
seal
carriage
legs
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Withdrawn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
EP05817996A
Other languages
German (de)
English (en)
Inventor
Peter Keller
Dietmar Rudy
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.)
IHO Holding GmbH and Co KG
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 EP1843873A2 publication Critical patent/EP1843873A2/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Withdrawn legal-status Critical Current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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/08—Arrangements for covering or protecting the ways
    • F16C29/084—Arrangements for covering or protecting the ways fixed to the carriage or bearing body movable along the guide rail or track
    • F16C29/086—Seals being essentially U-shaped, e.g. for a U-shaped carriage
    • 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
    • F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
    • F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
    • F16C29/0638—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls
    • F16C29/0642—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls
    • F16C29/0645—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls with load directions in O-arrangement

Definitions

  • the present invention relates to linear roller bearings, with a rolling bearing on a guide rail carriage.
  • Such carriages are often provided on their faces with scrapers that strip foreign matter such as chips, dusts and coolants from the guide rail and thus prevent the penetration of these foreign substances in the carriage and in particular in the range of raceways for the rolling elements.
  • a linear roller bearing has become known, for example, from US Pat. No. 5,590,965 A.
  • the guide rail is provided on both its longitudinal sides with two ball grooves into which the wiper engages with its wiper system. Due to the contour of the guide rail, the wiper system - preferably sealing lip or sealing edge - experiences pronounced deflections along its direction of extension around the circumference of the guide rail. These sometimes pronounced deflections between adjacent ball grooves cause points of increased stiffness.
  • this wiper system compresses along its extension evenly by a certain amount when it is in wiping contact with the guide rail, there is in places an increased pressing force of the wiper on the guide rail due to the area with increased rigidity.
  • this increased pressure force for example, the sealing edge leads to increased wear on the scraper, so that a proper function of the scraper is not guaranteed.
  • Object of the present invention is to provide a linear roller bearing according to Specify features of the preamble of claim 1, in which a uniform wear is ensured on the stripping of the scraper.
  • the scraper has a stripping lägee preferably plate-shaped seal, on whose due to the contour of the stripping rigidity increased points, such as corners, targeted material weakenings are provided, which a compliance of the scraper to this position Increase len.
  • the carriage is U-shaped and surrounds with its two legs, the guide rail. The scraper is then in scraping contact with the two longitudinal sides and the top of the guide rail. If the scraper is in scrape contact with the long sides and the top of the guide rail, the sealing edge or the sealing lip of the scraper is pressed in evenly and elastically along its extent. The points with increased flexibility thereby cause the contact pressure of the stripper along its displacement in the circumferential direction around the guide rail around is at least approximately uniform.
  • This material weakening may be formed as a recess or recess on the plate-shaped seal near the stripper.
  • seals can be economically formed by injection molding.
  • injection mold can be considered in a simple way recesses or recesses, which later contribute to the seal to a targeted material weakening.
  • the preferably U-shaped and plate-shaped seal with its the legs in stripping contact with the longitudinal sides and with their crosspiece connecting the two legs in stripping contact with the top of the guide rail.
  • the seal can be provided with such recesses, so that an increased flexibility is ensured in these corners.
  • linear roller bearing projecting lugs may be provided on these legs in the direction of the respective opposite leg, whose inner circumference is provided with the stripping. At these noses these recesses are then also provided, which may be particularly appropriate if this nose requires strong deflections on the stripping.
  • Figure 2 shows the scraper of Figure 1 in a perspective view, cut and
  • FIG. 3 is a perspective and enlarged view of a seal of the scraper according to FIG. 2 and FIG.
  • FIG. 4 partially cut a linear roller bearing according to the invention. Detailed description of the drawing
  • the linear roller bearing according to the invention shown in FIG. 4 has a guide carriage 2 guided longitudinally displaceably on a guide rail 1. At both ends of the carriage 2 scrapers 3 are releasably attached.
  • the carriage 2 has a substantially U-shaped profile. The carriage 2 engages with its two legs 4, the guide rail. 1
  • the guide rail 1 has an upper side and two opposite longitudinal sides, wherein the longitudinal sides are each provided with a plurality of raceways 6 formed by ball grooves 5 for balls 7.
  • the four ball grooves 5 of the guide rail 1 are arranged in o-arrangement to each other.
  • the guide carriage 2 has on its two legs 4 on its sides facing the longitudinal sides of the guide rail 1 facing sides two raceways 6 opposite tracks 8, which are also formed as ball grooves 9.
  • the ball grooves 5, 9 of the guide rail 1 and the guide carriage 2 define first and second load channels 10, 11, in which the balls 7 roll under load on the ball grooves 5, 9.
  • Dashed lines indicated deflection channels 12, 13 and return channels 14, 15 connect the beginning and end of the load channels 10, 11 endlessly.
  • the load channel 10 When tensile forces on the guide carriage 2, which pull the guide carriage 2 upwards away from the guide rail 1, the balls 7 of the first load channels 10 transmit the load.
  • the load channel 10 therefore has a train track.
  • the second load channels When two pressure forces act on the carriage 2, the second load channels transmit the load.
  • the load channel 11 therefore has a print career.
  • the scraper 3 is provided on its inner circumference with a scraper system 16, which in the present case is formed by a sealing lip 16a, as can be seen in particular from FIG. 2 described below.
  • the stripping system 16 is adapted to the contour of the guide rail 1.
  • the scraper 3 is with its stripping system 16 in stripping contact with the top and the two longitudinal sides of the guide rail. 1
  • FIG. 1 shows the individual parts of the scraper 3 according to the invention.
  • a housing 17 two plate-shaped seals 18 formed from flexible material are arranged one behind the other in the rail direction. Between the two seals 18, a support plate 19 is arranged, on which the two seals 18 are supported with their sides facing the support plate 19.
  • the housing 17 has seen in longitudinal section through the carriage 2 on an approximately U-shaped, open to the guide rail 1 section profile.
  • the two leg portions 20, 21 of this section profile form a front wall and a rear wall of the housing 17, wherein the rear wall faces the carriage 2.
  • a bottom part 22 connecting the two leg parts 20, 21 forms a circumferential wall of the housing 17.
  • the housing 17 is provided with a first receptacle 23 for the support plate 19.
  • a first receptacle 23 for the support plate 19.
  • the support plate 19 is aligned in exact position in all spatial axes.
  • FIG. 2 shows the first receptacle 23 with a rectangular cross-section, this first receptacle 23 being in the bottom part 23 as well as in FIG Leg portions 20, 21 is formed.
  • the housing 17 is further provided with a second receptacle 24 for the two seals 18.
  • the two second receptacles 24 are also shown in FIG.
  • the second receptacles 24 are formed here as a rectangular recess in both the bottom part 22 and in the leg portions 20, 21.
  • the seals 18 are properly received in these second receptacles 24, they are aligned in exact position in all spatial axes.
  • the seals 18 are supported with their one end face on the front wall and the rear wall of the housing 17 and with its other end face on the support plate 19. Even if one of the two seals 18 is removed, it is thus ensured that the other remaining seal 18 is held correctly and accurately in position in the housing 17.
  • the plate-shaped seals 18 can be easily removed from the housing 17 and replaced by other seals.
  • the carriage with the mounted scraper 3 is arranged on the guide rail 1, only the scraper 3 needs to be detached from the carriage 2. Then, the housing 17 of the scraper 3 can be removed upwards from the guide rail 1.
  • the two seals 18 and the support plate 19 may initially remain on the guide rail 1. Since the two seals 18 are preferably formed of a flexible material, they can be bent so that they can be removed from the guide rail 1. Now new gaskets can be put on and the housing can be listed again.
  • the seals 18 and the support plate 19 are also form-fitting connected with each other.
  • the support plate 19 is provided with two projections 25.
  • the two projections 25 are each formed on a transverse web 25 a of the legs 19 a of the support plate 19.
  • Both seals 18 are provided with two recesses 26, wherein the projections 25 of the support plate 19 engage in the recesses 26 of the two seals.
  • the depth of the recesses 26 is about half the thickness of the support plate 19. Since the two seals 18 are arranged on both sides of the support plate 19, consequently, the two projections 25 of the support plate 19 in both the recesses 26 of one and the other seal 18 intervene.
  • the present two-part running support plate 19 may also be made in one piece. Then, the two transverse webs 25a of the support plate 19 are integrally connected to each other.
  • the ball grooves 5, 9 are arranged on the guide rail 1 such that the two legs 27 of the U-shaped seal 18 are each provided with a protruding nose 27 on their mutually facing sides.
  • Figure 3 shows a portion of the seal 18 in a perspective view with the nose 28. This figure is also clear that the sealing lip 16a of the contour of the guide rail 1 is adapted so that the sealing lip 16a is properly in scraping contact with the guide rail 1.
  • these targeted material weakenings consist in the fact that a plurality of recesses, which penetrate the seal 18 and form slots 30, are provided on the stiffness-elevated points. These slots 30 are arranged at a small distance from the sealing lips 16a. As a result, the sealing lips 16 a are not supported at these locations, and can deflect in the direction of the slots 30. In this way, a uniform pressure of the sealing lip 16a along the entire extent can be ensured.
  • slots 30 are provided both in the region of the lugs 28 and in the region of corners, which are formed by the two legs 27 and the transverse web 29.
  • seals 18 are to be mounted on the guide carriage 2 for such linear roller bearings, care must be taken that the seals 18 are perfectly aligned with the guide rail 2. Otherwise, no perfect wiping contact of the wiper 3 with the guide rail 1 is ensured.
  • the positionally accurate alignment of the seal 18 - be it with scrapers with or without housing - is hampered by the effective elastic restoring forces of the voltage applied to the guide rail 1 sealing lip 16 a, which will be explained below. If one thinks of the sealing lip 16a away in the region of the crosspiece 29, there is no concatenation of the seal with the guide rail 1 on the upper side of the guide rail 1. Only the two legs 27 with their sealing lip 16a are in scraping contact with the guide rail 1.
  • the sealing lips 16a are resiliently spring-loaded against the longitudinal sides of the guide rail 1.
  • the effective pressure forces of the sealing lips 16a on both sides of the guide rail 1 are in an equilibrium of forces, so. that in this Situation is given a perfect alignment of the seal 18 with respect to the guide rail 1.
  • the scraper 3 is provided with a stop 31, as FIG. 1 shows with respect to the support plate 19.
  • This stop 31 is provided for abutment against the ball groove 5 of the guide rail 1 of the first rolling body channel. It can be seen from FIG. 1 that the stop 31 is formed on a nose 32.
  • the support plate 19 has on its two legs in each case the integrally formed nose 32. It can be seen from FIG. 2 that the sealing lip 16a projects somewhat beyond the nose 32.
  • the seal 18 is properly positioned with respect to the guide rail 1, it is thus ensured that the nose 32 is out of contact with the guide rail 1. If due to the effective restoring forces of the sealing lip 16a at the top of the guide rail 1 of the not yet fixed to the carriage 2 scraper 3 is pulled up, this can only happen so far until the nose 32 abuts against the guide rail 1. In this situation, it is ensured that the sealing lip 16a is not inadmissible is deformed. The fitter involved with the assembly can also easily determine due to the suddenly increased resistance that the stop 31 is already applied to the guide rail 1.
  • the scraper 3 is provided with a further stop 33.
  • This stop 33 is formed on the projection 25 of the support plate 19 already described above.
  • the sealing lip 16a projects beyond this stop 33 in the direction of the upper side of the guide rail 1. If the scraper 3 is pressed too far down during assembly to the carriage 2, the stop 33 abuts against the top of the guide rail 1. The voltage applied to the top sealing lip 16a is not unduly pressed against the top due to the stop 33, so it is not damaged.
  • the wiper 3 is properly positioned between the two described stop situations, preferably the center position, and can be fixed to the guide carriage 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

L'invention concerne un palier à roulement linéaire qui comprend un chariot de guidage (2) logé par palier à roulement sur un rail de guidage (1), ainsi qu'au moins un élément racleur (3) pratiquement en forme de U, placé du côté frontal sur le chariot de guidage (2) et servant à enlever des corps étrangers, comme des copeaux, des poussières et des liquides de refroidissement, du rail de guidage. Selon l'invention, un système de raclage (16), de préférence une lèvre d'étanchéité (16a) ou une arête d'étanchéité, de l'élément racleur (3) est en contact de raclage avec le rail de guidage (1). L'élément racleur (3) présente un joint d'étanchéité (16a) de préférence en forme de plaque formant le système de raclage (16), les points de ce joint d'étanchéité à rigidité accrue en raison de la forme du joint, les coins par exemple, présentant des réductions de matière ciblées qui augmentent la souplesse du système de raclage en ces points.
EP05817996A 2005-01-27 2005-12-17 Palier a roulement lineaire avec moyen d'essuyage en forme de u placé de front Withdrawn EP1843873A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005003711A DE102005003711A1 (de) 2005-01-27 2005-01-27 Linearwälzlager
PCT/EP2005/013633 WO2006079395A2 (fr) 2005-01-27 2005-12-17 Palier a roulement lineaire

Publications (1)

Publication Number Publication Date
EP1843873A2 true EP1843873A2 (fr) 2007-10-17

Family

ID=36609391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05817996A Withdrawn EP1843873A2 (fr) 2005-01-27 2005-12-17 Palier a roulement lineaire avec moyen d'essuyage en forme de u placé de front

Country Status (6)

Country Link
US (1) US20080144980A1 (fr)
EP (1) EP1843873A2 (fr)
JP (1) JP2008528894A (fr)
CN (1) CN101111348A (fr)
DE (1) DE102005003711A1 (fr)
WO (1) WO2006079395A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5289217B2 (ja) * 2009-06-30 2013-09-11 日本トムソン株式会社 直動案内ユニット
US8632248B2 (en) * 2010-03-26 2014-01-21 Nsk Ltd. Linear guide device
WO2012070185A1 (fr) * 2010-11-24 2012-05-31 日本精工株式会社 Composants d'un joint d'étanchéité latéral pour dispositif de guidage linéaire et dispositif de guidage linéaire
WO2013161260A1 (fr) * 2012-04-27 2013-10-31 日本精工株式会社 Dispositif de guidage de mouvement linéaire
US9157477B2 (en) * 2013-10-17 2015-10-13 Hiwin Technologies Corp. Linear motion guide apparatus having lubricating oil wiping mechanism
CN103742624A (zh) * 2014-02-12 2014-04-23 太仓斯普宁精密机械有限公司 一种便于排屑的凸轮
DE102017128519A1 (de) * 2017-12-01 2019-05-09 Schaeffler Technologies AG & Co. KG Abstreifer für eine Führungsschiene

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JPH0515619Y2 (fr) * 1987-03-13 1993-04-23
JPH074334Y2 (ja) * 1988-09-29 1995-02-01 日本精工株式会社 プロテクタ付リニアガイド装置
US5087130A (en) * 1990-03-20 1992-02-11 Nippon Seiko Kabushiki Kaisha Under seal device of linear movement guide bearing
JP2526062Y2 (ja) * 1990-06-26 1997-02-12 日本精工株式会社 リニアガイド装置の防塵装置
DE4141038A1 (de) * 1991-12-12 1993-06-17 Schaeffler Waelzlager Kg Abstreifereinheit fuer ein lagerelement
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JPH08200362A (ja) * 1995-01-20 1996-08-06 Nippon Seiko Kk 潤滑剤含有ポリマ潤滑リニアガイド装置
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JP3331280B2 (ja) * 1995-07-31 2002-10-07 日本トムソン株式会社 直動転がり案内ユニット
JPH09317765A (ja) * 1996-05-27 1997-12-09 Nippon Thompson Co Ltd 直動転がり案内ユニット
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EP1073848B1 (fr) * 1998-04-29 2007-10-03 Thomson Industries, Inc. Patin a mouvement lineaire integrant des dispositifs ameliorant les performances
JP4004873B2 (ja) * 2001-09-21 2007-11-07 Ｔｈｋ株式会社 案内装置のシール装置及び案内装置
EP1441136A1 (fr) * 2003-01-22 2004-07-28 Schneeberger Holding AG Dispositif accessoire pour guidage linéaire

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Also Published As

Publication number Publication date
JP2008528894A (ja) 2008-07-31
DE102005003711A1 (de) 2006-08-17
WO2006079395A2 (fr) 2006-08-03
WO2006079395A3 (fr) 2006-11-09
US20080144980A1 (en) 2008-06-19
CN101111348A (zh) 2008-01-23

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