WO2013073079A1 - リニアガイド装置のシール機構 - Google Patents

リニアガイド装置のシール機構 Download PDF

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Publication number
WO2013073079A1
WO2013073079A1 PCT/JP2012/005097 JP2012005097W WO2013073079A1 WO 2013073079 A1 WO2013073079 A1 WO 2013073079A1 JP 2012005097 W JP2012005097 W JP 2012005097W WO 2013073079 A1 WO2013073079 A1 WO 2013073079A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide rail
seal
lip
rolling
rolling element
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.)
Ceased
Application number
PCT/JP2012/005097
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
匠 中川
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.)
NSK Ltd
Original Assignee
NSK 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 NSK Ltd filed Critical NSK Ltd
Priority to US14/357,643 priority Critical patent/US9133878B2/en
Priority to CN201280056173.4A priority patent/CN103946567B/zh
Priority to EP12850395.0A priority patent/EP2781773A4/en
Priority to TW101130114A priority patent/TWI541452B/zh
Publication of WO2013073079A1 publication Critical patent/WO2013073079A1/ja
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • F16C29/088—Seals extending in the longitudinal direction of the carriage or bearing body
    • 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
    • F16C29/005—Guide rails or tracks for a linear bearing, i.e. adapted for movement of a carriage or bearing body there along
    • 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
    • F16C29/063—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body, e.g. a carriage or part thereof, provided between the legs of a U-shaped guide rail or track
    • 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
    • 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
    • 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
    • F16C29/065—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 rollers
    • 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
    • F16C29/0652—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 at least partly defined by separate parts, e.g. covers attached to the legs of the main body of the U-shaped carriage
    • F16C29/0654—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 at least partly defined by separate parts, e.g. covers attached to the legs of the main body of the U-shaped carriage with balls
    • F16C29/0659—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 at least partly defined by separate parts, e.g. covers attached to the legs of the main body of the U-shaped carriage with balls with four rows of balls
    • F16C29/0661—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 at least partly defined by separate parts, e.g. covers attached to the legs of the main body of the U-shaped carriage with balls with four rows of balls with load directions in O-arrangement
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings

Definitions

  • This invention relates to a seal mechanism in a linear guide device.
  • the seal mechanism in the linear guide device is a mechanism that seals between the guide rail and the slider body and the end cap straddling the guide rail to prevent leakage of internal lubricant and intrusion of external dust.
  • various means have been employed in the past, but the one described in Patent Document 1 is one of them.
  • an under seal (side seal 800 in Patent Document 1) is attached to both sleeve portions of the slider main body and the end cap straddling the guide rail so as to extend in the axial direction.
  • the under seal mounting means is implemented by mounting a retainer fitted with an under seal on the slider body and the side cap.
  • the end face of the cage and the end face of the under seal are flush with each other.
  • the end seal and the side seal are brought into close contact with each other by closely contacting the side seal with the end surface of the cage.
  • the gap between the guide rail and the slider main body and the end cap straddling the guide rail is sealed.
  • an object of the present invention is to improve the sealing performance of the end portion of the under seal.
  • the seal mechanism of the linear guide device includes: a guide rail having rail-side rolling element rolling grooves extending in the axial direction on both sides; and a position of the guide rail at a position facing both sides of the guide rail.
  • a slider body that has an internal linear rolling element return path and is laid over the guide rail so as to be relatively movable, and on the other surface of the guide rail at a position facing both side surfaces of the guide rail.
  • Each of the two rolling elements that has a second sleeve part that is integrally continuous via the opposing second back part and that is individually joined to both end surfaces in the axial direction of the slider body and that faces each second sleeve part.
  • Linear load rolling path comprising rolling grooves and rolling element return path
  • An end cap formed with an arc-shaped direction change path that communicates with the load rolling path, the rolling element return path, and the rolling element rolling path formed from the direction changing path, and is movably loaded.
  • a side seal provided with a lip portion that is individually joined to the end surface of the end cap in the axial direction and that slidably contacts the guide rail on a surface of the third back portion and each third sleeve portion facing the guide rail; Mounted on a side farther from the first back and the second back than the slider-side rolling element rolling groove and the direction change path on the surface of the first sleeve and the second sleeve facing the guide rail.
  • An under seal extending in the axial direction, In the sealing mechanism of the linear guide device that seals the inside and outside with the under seal and the side seal, the end cap is slidably contacted with the guide rail and refracted midway, and the end cap and the guide rail between the end cap and the guide rail.
  • An auxiliary lip that surrounds the end of the under seal from two sides of the side seal side and the side far from the second back portion is provided, and the auxiliary lip is on the surface facing the guide rail side of the second sleeve portion,
  • An axial lip disposed along the under seal on a side farther from the second back than the under seal is integrated with an end of the axial lip on the side seal side, and the second sleeve Continuous in the direction intersecting the axial direction along the edge of the surface on the guide rail side close to the side seal and in contact with the end of the under seal It is characterized by comprising the arranged cross direction lips.
  • a concave portion is provided on a side surface of the cross direction lip in the auxiliary lip, and an end portion of the under seal is fitted into the concave portion.
  • the end portion of the under seal is formed by the auxiliary lip refracted midway in the longitudinal direction between the end cap and the guide rail. 2 side far from the back) and side seal side.
  • the cross-direction lip of the auxiliary lip is in contact with the end of the under seal, first, the end seal is sealed between the end of the under seal and the cross-direction lip.
  • an axial lip of the auxiliary lip seals the leak and on the side seal side the cross lip seals the leak.
  • the labyrinth effect has an effect that the sealing performance can be improved.
  • FIG. 1 is an overall perspective view showing an embodiment of the present invention.
  • 4A and 4B are diagrams illustrating an auxiliary lip, in which FIG. 4A is a perspective view, FIG. 5B is a cross-sectional view taken along line AA in FIG. 4A, and FIG.
  • Sectional drawing of the end cap and side seal which shows the inner surface of each sleeve part of the end cap and side seal of the state of FIG.
  • the principal part enlarged view of FIG. 5 which shows the contact state of the auxiliary
  • FIG. 1 is a perspective view showing an example of a linear guide device, and includes a guide rail 10, a slider main body 20, an end cap 30, and a side seal 40 whose length is shortened in the drawing. Also, in the drawing, illustration of a screw for fixing the end cap 30 and the side seal 40 to the slider body 20 is omitted.
  • the guide rail 10 is horizontal in the axial direction and its left-right direction, and a slider 100 including a slider body 20, an end cap 30, and a side seal 40 is straddled on the upper surface.
  • a slider 100 including a slider body 20, an end cap 30, and a side seal 40 is straddled on the upper surface.
  • the axial direction (longitudinal direction of the guide rail 10), the vertical direction, and the horizontal direction will be described along this example. Therefore, when a change such as an inclination in the axial direction, the up-down direction, or the left-right direction of the guide rail 10 is made, the direction and inclination of each part are interpreted according to the posture.
  • the guide rail 10 has rail-side rolling element rolling grooves 11 extending in the axial direction in two upper and lower stages on both left and right side surfaces.
  • the slider body 20 has left and right first sleeve portions 22 and 22 at positions facing the left and right side surfaces of the guide rail 10, respectively.
  • the first sleeve portions 22 and 22 are integrally continuous via a first back portion 21 that faces the upper surface of the guide rail 10.
  • Each of the first sleeve portions 22 and 22 has a slider-side rolling element rolling groove (not shown in the figure) facing the rail-side rolling element rolling groove 11 and an internal linear rolling element return path. is doing.
  • the slider body 20 is suspended from the upper surface so as to be movable relative to the guide rail 10. A linear load rolling between the guide rail 10 and the slider body 20 by the rail-side rolling element rolling groove 11 of the guide rail 10 and the slider-side rolling element rolling groove of the slider body 20 opposed to the rail-side rolling element rolling groove 11.
  • a road is formed.
  • the end cap 30 is also suspended from the upper surface to the guide rail 10 like the slider body 20.
  • the end cap 30 has left and right second sleeve portions 32, 32 at positions facing the left and right side surfaces of the guide rail 10, respectively. These second sleeve portions 21 and 32 are integrally continuous via a second back portion 31 facing the upper surface of the guide rail 10.
  • the end cap 30 has a linear load rolling path between the guide rail 10 and the slider main body 20 on the surface of the second sleeve portions 32 and 32 on the guide rail 10 side, and the slider in the slider main body 20.
  • Arc-shaped direction changing paths 33 and 33 (FIG. 5) that communicate with the rolling element return path are formed.
  • a rolling element rolling path (not shown) is formed by the load rolling path and the rolling element return path (both not shown) and the direction changing paths 33 and 33 shown in FIG.
  • this rolling element rolling path a large number of rolling elements (not shown) are loaded so as to roll freely.
  • rollers are used as the rolling elements, but balls may be used.
  • the side seal 40 is also suspended from the upper surface of the guide rail 10 like the slider body 20 and the end cap 30.
  • the side seal 40 has left and right third sleeve portions 42 and 42 at respective positions facing the left and right side surfaces of the guide rail 10.
  • the third sleeve portions 42, 42 are integrally continuous via a third back portion 41 that faces the upper surface of the guide rail 10.
  • the 3rd back part 41 and the inner surface of each 3rd sleeve parts 42 and 42, ie, the surface which faces the said guide rail 10 side, are provided with the lip
  • FIG. 5 the lip
  • An under seal 50 and an inner seal 51 are mounted on the surfaces of the first sleeve portion 22 and the second sleeve portion 32 facing the guide rail 10 side.
  • the under seal 50 is mounted on the lower side of the rolling element rolling groove and the direction changing path 33 (corresponding to “the side far from the first back portion 21 and the second back portion 31” described in claim 1) and is attached to the shaft. Extending in the direction.
  • a rolling element holder (not shown) is fixed along these surfaces. .
  • the under seal 50 and the inner seal 51 are supported by fitting a base portion into a groove of the cage, as described in, for example, Patent Document 1.
  • the inner seal 51 may not be mounted depending on the use mode of the linear guide device. However, in this embodiment, the end portion of the inner seal 51 is in contact with the lip portion 43 of the side seal 40, thereby sealing the inside and outside. is doing. Further, at least one of the under seal 50 and the inner seal 51 may be directly attached to the sleeve portions 22 and 32 without using a rolling element retainer.
  • the end cap 30 is provided with an auxiliary lip 60 (FIG. 3).
  • the auxiliary lip 60 is in sliding contact with the guide rail 10 in the entire longitudinal direction.
  • the auxiliary lip 60 is refracted midway and surrounds the end of the under seal 50 between the end cap 30 and the guide rail 10 from two directions.
  • the auxiliary lip 60 is attached to the surface of the second sleeve 32 of the end cap 30 facing the guide rail 10 side.
  • the auxiliary lip 60 includes an axial lip 61 and a cross direction lip 62 as shown in a perspective view in FIG.
  • the axial lip 61 is lower than the under seal 50 on the surface of the second sleeve portion 32 facing the guide rail 10 (corresponding to “the far side from the second back portion” according to claim 1). ) Along the under seal 50.
  • the cross direction lip 62 is integrated with the axial lip 61.
  • the cross direction lip 62 extends upward from the end of the axial lip 61 on the side seal 40 side along the edge of the surface of the second sleeve 32 on the guide rail 10 side close to the side seal 40. It is continuous.
  • the upward direction is a direction approaching the second back portion 31 among the directions intersecting the axial direction.
  • the auxiliary lip 60 has a shape close to an L shape as a whole.
  • the auxiliary lip 60 is made of the same material as the under seal 50 and the inner seal 51.
  • the auxiliary lip 60 is fixed by fitting one side along the longitudinal direction into a concave groove 34 formed in the surface of the second sleeve portion 32 in a shape close to an L shape having the same shape as the auxiliary lip 60.
  • the other side of the auxiliary lip 60 protrudes toward the guide rail 10 and comes into sliding contact with the guide rail 10 with an appropriate tightening allowance.
  • the protruding end 63 of the auxiliary lip 60 is pointed like a wedge, and the protruding end 63 is deformed by slidingly contacting the guide rail 10 over the entire length of the auxiliary lip 60 so as to be in close contact with the guide rail 10.
  • FIG. 7 shows an example in which a recess 62 a is provided at a position where the under seal 50 contacts the cross direction lip 62 and the end of the under seal 50 is fitted into the recess 62 a.
  • a lubricant such as grease is sealed in the rolling element return path in the slider body 20.
  • a lubricant such as grease is sealed in the rolling element return path in the slider body 20.
  • the under seal 50, the inner seal 51, and the lip 43 of the side seal 40 are provided between the sleeve portions 22 and 32 of the slider body 20 and the end cap 30 and the left and right side surfaces of the guide rail 10.
  • the both sides in the axial direction and the up and down direction are closed. Therefore, the lubricant taken out from the inside of the slider body 20 to the guide rail 10 by the rollers stays in the inside surrounded by the seals 50 and 51 and the lip 43.
  • the end of the under seal 50 is surrounded by the auxiliary lip 60, and the end of the under seal 50 is abutted against the cross direction lip 62 of the auxiliary lip 60. .
  • the under seal 50 and the cross direction lip 62 prevent the leakage of the lubricant.
  • the cross direction lip 62 is primarily sealed on the side seal 40 side, and the lubricant exceeding this is finally sealed by the cross direction lip 62 and the lip portion 43 of the side seal 40.
  • the cross direction lip 62 is formed only in the entire height of the second sleeve 32 of the end cap 30 in the lower one third in this embodiment. However, since the lubricant leaks from the lower portion of the sleeve portion 32 due to gravity, there is no problem in the first place if it is sealed to such a high level.
  • one axial lip 61 is close to the lower side of the under seal 50 and the distance between the two is narrow, and the other cross direction lip 62 is close to the inside of the lip portion 43 of the side seal 40. Even here, the distance between the two is narrow. For this reason, the lubricant leaking from the abutting portion between the end portion of the under seal 50 and the cross direction lip 62 is prevented from leaking to the outside by the narrow and long gap between the axial lip 61 and the under seal 50. Further, the lubricant that passes the upper end of the cross direction lip 62 beyond the primary seal is prevented from leaking to the outside due to the narrow and long gap between the cross direction lip 62 and the lip portion 43.
  • the expansion of the width dimension of the under seal 50 and the lip portion 43 is possible even if the width dimension of the attachment portion to the end cap 30 and the side seal 40 remains as before. That is, the width dimension of the part which protrudes toward the guide rail 10 from the 2nd sleeve part 32 of the end cap 30 and the 3rd sleeve part 42 of the side seal 40 of the under seal
  • FIG. 7 shows an example in which a recess 62a is provided on the side surface of the cross direction lip 62, and an end of the under seal 50 is fitted in the recess 62a.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Sealing Of Bearings (AREA)
PCT/JP2012/005097 2011-11-16 2012-08-10 リニアガイド装置のシール機構 Ceased WO2013073079A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US14/357,643 US9133878B2 (en) 2011-11-16 2012-08-10 Seal mechanism of linear guide apparatus
CN201280056173.4A CN103946567B (zh) 2011-11-16 2012-08-10 直线引导装置的密封机构
EP12850395.0A EP2781773A4 (en) 2011-11-16 2012-08-10 SEALING MECHANISM FOR LINEAR GUIDANCE DEVICE
TW101130114A TWI541452B (zh) 2011-11-16 2012-08-20 Sealing mechanism of linear guide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-250818 2011-11-16
JP2011250818A JP5874337B2 (ja) 2011-11-16 2011-11-16 リニアガイド装置のシール機構

Publications (1)

Publication Number Publication Date
WO2013073079A1 true WO2013073079A1 (ja) 2013-05-23

Family

ID=48429184

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/005097 Ceased WO2013073079A1 (ja) 2011-11-16 2012-08-10 リニアガイド装置のシール機構

Country Status (6)

Country Link
US (1) US9133878B2 (enExample)
EP (1) EP2781773A4 (enExample)
JP (1) JP5874337B2 (enExample)
CN (1) CN103946567B (enExample)
TW (1) TWI541452B (enExample)
WO (1) WO2013073079A1 (enExample)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWD172771S (zh) * 2014-12-08 2016-01-01 上銀科技股份有限公司 六列滾珠軌道之部分

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003254329A (ja) * 2002-02-28 2003-09-10 Nsk Ltd 直動案内軸受装置
JP2010156381A (ja) 2008-12-26 2010-07-15 Nsk Ltd リニアガイド

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2526059Y2 (ja) * 1990-06-12 1997-02-12 日本精工株式会社 リニアガイド装置の防麈構造
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CN103946567B (zh) 2016-06-15
JP2013104534A (ja) 2013-05-30
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US9133878B2 (en) 2015-09-15
TW201337123A (zh) 2013-09-16
US20150043841A1 (en) 2015-02-12

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