WO2013161260A1 - 直動案内装置 - Google Patents
直動案内装置 Download PDFInfo
- Publication number
- WO2013161260A1 WO2013161260A1 PCT/JP2013/002701 JP2013002701W WO2013161260A1 WO 2013161260 A1 WO2013161260 A1 WO 2013161260A1 JP 2013002701 W JP2013002701 W JP 2013002701W WO 2013161260 A1 WO2013161260 A1 WO 2013161260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal
- under
- linear motion
- slider
- guide rail
- Prior art date
Links
- 230000033001 locomotion Effects 0.000 title claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 12
- 239000007779 soft material Substances 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 abstract description 24
- 230000000694 effects Effects 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 8
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
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
- 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
- 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
-
- 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
- F16C29/08—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
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators
Definitions
- the present invention is used in a machine tool or the like as a means for guiding a linearly moving object in its moving direction, and includes a guide rail and a slider slidably laid on the guide rail via a rolling element.
- the present invention relates to a linear motion guide device.
- linear motion guide device linear guide
- side seals and under seals are used as seal members for the sliding contact portions of the guide rail and the slider. That is, in the linear motion guide device, the lubricant is sealed in the slider in order to maintain the function for a long time. Therefore, if this lubricant flows out of the slider, the surrounding area will be contaminated. Further, if the amount of lubricant flowing out is large, the lubricant inside the slider is insufficient, and the function of the linear motion guide device cannot be maintained.
- Patent Document 1 for example, a side seal is attached to the slider in order to prevent the lubricant from flowing out from the inside of the slider.
- the side seal is attached to the end face in the linear motion direction of the slider (the direction in which the slider moves linearly along the guide rail, hereinafter the same), and the lubricant in the slider flows out of the slider from the axial direction of the guide rail. prevent. Thereby, about the linear motion direction of a linear motion guide apparatus, the outflow of a lubricant can be prevented by the side seal disclosed in Patent Document 1.
- the side seal and the under seal are easy to manufacture if they are configured separately.
- the side seal 117 is deformed, and the degree of adhesion between the guide rail (not shown) and the side seal 117 is reduced. As a result, a gap is formed between the side seal 117 and the guide rail, and the lubricant may flow out of the slider. Further, if the length of the under seal 110 is strictly controlled, there is a problem that labor and cost are required.
- An object of the present invention is to provide a linear motion guide device that can maintain the adhesion between the under lip and the side lip even when the length of the seal changes, and can prevent the leakage of the lubricant from the inside of the slider.
- a linear motion guide device includes a guide rail and a slider straddling the guide rail, and the slider is a roller of the right and left sleeves.
- a linear motion guide device that slides in a linear motion direction on the guide rail via a moving body, and seals an end surface of the slider in the linear motion direction as a seal member of a sliding contact portion between the guide rail and the slider.
- the side seal having a side lip extending along the outer periphery of the guide rail, and the linear movement direction so as to seal a portion where a gap is formed between the slider and the guide rail at the lower portion of the sleeve portion
- an under seal having an under lip extending as a separate part, and the under seal is connected to the side seal at least at an end in the linear motion direction or in the vicinity thereof.
- a gap sealing convex portion protruding toward the side seal so as to seal the gap, and the gap sealing convex portion is integrally formed adjacent to the under lip of the under seal.
- the end face of the side lip of the side seal is in contact with no gap.
- the side seal has a soft material portion and a hard material portion
- the under seal has the gap sealing convex portion formed thereon. It is preferable that the end portion in the linear motion direction or a portion in the vicinity thereof is sandwiched between the soft material portion and the hard material portion of the side seal.
- the gap sealing convex portion is provided so as to seal the gap between the side lip and the under lip at least in the vicinity of the end portion of the slider in the linear motion direction, Due to the effect of the portion, leakage of the lubricant from the vicinity of the end portion in the linear motion direction between the side lip and the under lip is prevented. And if it is such a structure, since the side seal and the under seal are provided as separate parts, even if the length of the under seal is changed, the adhesion between the under lip and the side lip is improved. This keeps the lubricant from leaking.
- FIG. 2 is a front view of FIG. 1, in which the right side portion is broken away from the center.
- FIG. 3 is an enlarged view of a main part of FIG. 2. It is the figure which looked at the holder
- FIG. 3 is a cross-sectional view of the side seal plate along the linear movement direction (XX cross section in FIG. 1).
- the linear guide device 1 includes a guide rail 2 and a slider slidably provided on the guide rail via a rolling element (cylindrical roller in this example) 24. 3 is provided.
- the guide rail 2 has a planar rolling element raceway surface 2 a formed along the longitudinal direction of the guide rail 2 on the left and right side surfaces thereof.
- two rolling element raceway surfaces 2 a are formed on the left and right side surfaces of the guide rail 2.
- the slider 3 is formed with planar rolling element raceway surfaces 3a respectively facing the rolling element raceway surfaces 2a of the guide rail 2 on the left inner side surface portion and the right inner side surface portion of the slider body 4, and the guide rail 2 and A linear rolling element rolling path is formed between the rolling element raceway surfaces 2 a and 3 a of the slider 3.
- a large number of rolling elements 24 that roll with the movement of the slider 3 or the guide rail 2 in the linear movement direction are interposed in the rolling element rolling path.
- These rolling elements 24 are formed in a cylindrical roller shape, and the rolling elements 24 that have rolled on the rolling element rolling path change direction within end caps 5 (see FIG. 1) provided at both ends of the slider 3 in the front-rear direction. After that, infinite circulation is possible that returns to the original position through the rolling element return passage 6 (see FIG. 2) formed in the slider 3. Thereby, the slider 3 can be smoothly slid in the linear motion direction on the guide rail 2 via the rolling elements 24 of the right and left sleeve portions.
- a retainer 7 for the rolling element 24 is provided on the left inner surface portion and the right inner surface portion of the slider 3.
- the cage 7 has two plate-like portions 7 a facing the rolling element raceway surface 2 a of the guide rail 2, and rolls on the rolling element raceway surface 3 a of the slider 3.
- the rolling element 24 is held by a rectangular rolling element holding window 8 formed in the plate-like portion 7 a of the cage 7.
- an upper seal 9 and an under seal 10 are provided between the left and right side portions of the guide rail 2 and the inner side portions of the left and right sleeve portions of the slider 3 over almost the entire length of the slider 3 in the linear motion direction. It is provided as a seal member.
- These sealing members 9 and 10 are made of, for example, an injection molded product of a soft synthetic resin (elastic material such as polyester elastomer or urethane elastomer) or a metal plate (steel material, aluminum material) base portions 9a and 10a. (Rubber, elastomer, etc.) are integrally molded.
- each seal member 9, 10 has a base portion 9 a, 10 a, and the cage 7 has a dovetail groove that fits with the base portion 9 a, 10 a of each seal member 9, 10.
- Shaped seal member mounting grooves 11 and 12 are formed.
- the seal member mounting grooves 11 and 12 are formed in the cage 7 over almost the entire length of the slider 3.
- the seal member mounting grooves 11 and 12 are provided in the base portions 9 a and 10 a of the seal members 9 and 10.
- a ridge 14 for retaining to be fitted to the formed ridge 13 is formed over almost the entire length of the slider 3.
- each seal member 9 and 10 has the elastic lip
- a gap G1 between the upper portion of the side surface of the guide rail 2 and the upper portion of the inner surface of the slider 3 is sealed by the elastic lip portion 9b of the upper seal 9, and the gap G2 between the lower portion of the side surface of the guide rail 2 and the lower portion of the inner surface of the slider 3 Is sealed by an elastic lip portion (under lip) 10 b of the under seal 10.
- the gap generated between the guide rail 2 and each end cap 5 is sealed by a side seal plate 15 (see FIG. 5) attached to the front face of each end cap 5.
- the side seal plate 15 includes a holding plate 16, a seal member (side seal) 17, and a cover 18, as shown in an exploded perspective view in FIG.
- the cover 18 is a press-formed product of a metal plate (steel material, aluminum material, etc.).
- the holding plate 16 is an injection molded product of a synthetic resin (polyacetal, polyamide, etc.) which is a hard material.
- the seal member 17 is an injection molded product of a synthetic resin (polyester elastomer, urethane elastomer, etc.) or rubber (nitrile rubber, fluorine rubber, etc.) which is a soft material.
- a synthetic resin polyethylene elastomer, urethane elastomer, etc.
- rubber nitrile rubber, fluorine rubber, etc.
- a concrete brand name of a polyester-type elastomer Toyobo Co., Ltd. perprene (trademark) EN1000, EN2000, EN3000, EN5000.
- Hytrel registered trademark of Toray DuPont Co., Ltd.
- the seal member (side seal) 17 of the side seal plate 15 is provided as a separate part that is not restrained by the under seal 10.
- FIG. 7 XX sectional view in FIG. 1
- the seal member 17 (side seal) 17 of the side seal plate 15 is placed on the seal member so as to come into contact with the outer peripheral surface (surface) of the guide rail 2.
- a side lip 17b protruding from the base portion 17a is provided so as to be inclined toward the slider body 4 side.
- the seal member (side seal) 17 prevents the lubricant from leaking because the side lip 17 b is in sliding contact with the outer peripheral surface of the guide rail 2. Since the side lip 17b is inclined toward the slider body 4, the tip of the side lip 17b comes into contact with the guide rail 2 at the edge portion on the slider side, so that the effect of preventing leakage of the lubricant is great.
- FIG. 8A is a front view of a state in which the holding plate 16 that is a hard material portion of the side seal plate 15 and the seal member 17 that is a soft material portion are combined, and FIG. Part (A part) detail drawing (b).
- a convex portion 16a is formed at the lower end of the holding plate 16 which is a hard material portion.
- An insertion slit 10 s of the under seal 10 is defined by the convex portion 16 a and the end surface 17 e of the seal member 17. Accordingly, as shown in a perspective view of a main part in FIG. 9, in this state, the end surface 17 e of the seal member 17 is exposed toward the bottom surface 5 t of the end cap 5.
- FIG. 10 the perspective view (an edge part and the part of the vicinity) of the under seal
- the under seal 10 has gap sealing projections 20 formed at both ends in the longitudinal direction thereof so as to be continuous with its own elastic lip (under lip) 10b.
- the length of the gap sealing projection 20 in the longitudinal direction is substantially the same as or slightly shorter than the thickness of the seal member 17.
- FIG. 11 is a perspective view of a main part in a state where the under seal 10 is attached and the side seal plate 15 is not attached. As shown in the figure, in this state, the end of the under seal 10 protrudes from the end face of the end cap 5 in the longitudinal direction (linear motion direction).
- FIG. 12 shows a perspective view of a main part in a state where the under seal 10 is attached to the slider 3 and the side seal plate 15 is also attached.
- the longitudinal end portion of the under seal 10 is accommodated in the insertion slit 10 s of the under seal 10.
- the end portion of the under seal 10 is positioned in the vertical direction between the convex portion 16 a of the holding plate 16 and the end surface 17 e of the seal member 17. For this reason, the end part of the under seal 10 does not bend in the vertical direction, and the generation of a gap between the under seal 10 and the seal member 17 of the side seal plate 15 can be prevented.
- the linear motion guide device 1 is directed toward the side seal 17 so that the under seal 10 seals the gap between the under seal 10 and the side seal 17 at the end in the linear motion direction.
- the gap sealing projection 20 is formed integrally adjacent to the under lip 10b of the under seal 10 and the end surface of the side lip 17b of the side seal 17 Since the gap sealing projection 20 is in contact with the gap 17e without any gap, leakage of the lubricant from the vicinity of the end portion in the linear motion direction between the side lip 17b and the under lip 10b is prevented.
- the holding plate 16 is formed of a hard synthetic resin, and the lower surface of the under seal 10 faces the holding plate 16 and is supported by the holding plate 16.
- the holding plate is hard to be deformed, so that the effect of preventing the under seal 10 from being bent is great.
- the upper surface 20 m (the surface opposite to the surface facing the holding plate 16) 20 m of the gap sealing convex portion 20 faces the soft seal member 17. This is suitable for elastically deforming the member 17 and bringing it into close contact with the under seal 10.
- the gap sealing convex portion formed on the end surface 17e of the seal member 17 of the side seal plate 15 and the end portion protruding in the linear motion direction of the under seal 10 is provided.
- the 20 opposing surfaces 20m are in contact with each other. By this contact, the gap sealing projection 20 can close the gap between the under seal 10 and the seal member 17 of the side seal plate 15. Therefore, the lubricant does not leak from this gap.
- the gap sealing convex portion 20 is not provided, as shown in FIG. 14 as a comparative example for explaining the effect of the gap sealing convex portion 20 of the present embodiment, the side seal plate 15 A gap C shown in the figure is formed between the seal member 17 and the under seal 10. Therefore, the lubricant leaks from the gap C.
- the under seal 10 and the seal member 17 are provided as separate parts that are not restrained in the longitudinal direction (linear motion direction) of the guide rail 2.
- the contact state between the under seal 10 and the seal member 17 does not change even if the length of the under seal 10 slightly changes in the linear motion direction due to swelling during use (size increase due to the lubricant). Therefore, the expected sealed state can be maintained. Therefore, strict management of the length of the under seal 10 is unnecessary, and labor and cost are unnecessary.
- the clearance sealing convex part 20 is installed only in the both ends of a longitudinal direction (refer FIG. 10), compared with providing the clearance sealing convex part 20 over a longitudinal full length.
- the contact portion with the guide rail 2 can be reduced. Accordingly, the frictional resistance due to the contact can be reduced, and the sliding of the slider does not become heavy.
- the linear motion guide device according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
- one side seal plate 15 is attached to each end cap 5 .
- the present invention is not limited to this.
- a plurality of side seal plates may be attached to each cap 5.
- two end seal plates are attached to each end cap 5.
- the first side seal (part corresponding to the above-described side seal plate 15) 15A and the second side seal 25 are fastened together with screws (not shown) in this order from the end caps 5 side.
- 15 A of 1st side seals are comprised with the holding plate 16 and the sealing member 17, and since the 2nd side seal 25 is mounted
- FIG. The second side seal 25 includes a holding plate 16, a seal member 17, and a cover 18 in the same manner as that shown in FIG.
- the seal members 17 of the side seals 15A and 25 are side lips 17b extending along the outer periphery of the guide rail 2. Respectively.
- the side lip 17b of the first side seal 15A extends from the main body 17a of the seal member 17 so as to incline toward the end cap 5 side.
- the seal member 17 of the second side seal 25 extends such that the side lip 17b is inclined from the main body 17a of the seal member 17 toward the side opposite to the end cap 5.
- the side lip 17 b of the second side seal 25 is in contact with the guide rail 2 at the edge portion opposite to the end cap 5. For this reason, since it has both the 2nd side seal 25 with the high effect which prevents the penetration
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- General Engineering & Computer Science (AREA)
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- Bearings For Parts Moving Linearly (AREA)
Abstract
Description
つまり、図18に、従来のスライダを底面側から見た要部斜視図を例示するように、アンダーシール110が僅かでも直動方向Sで短い場合、サイドシール117とアンダーシール110のシール部材端面を所定の位置で密着させられない。そのため、サイドシール117のシール部117aとアンダーシール110の端面との間に、同図に示す隙間Cが生じてしまう。逆に、アンダーシール110が長いと、アンダーシール110の端面が、サイドシール117のシール部117aを所定の位置を超えて押し曲げてしまう。これにより、サイドシール117が変形し、不図示の案内レールとサイドシール117の密着度が低減する。そのため、やはりサイドシール117と案内レールの間に隙間ができてしまうので、潤滑剤がスライダ内部から流出するおそれがある。また、アンダーシール110の長さを厳密に管理しようとすると、労力とコストを要するという問題がある。
図1及び図2に示すように、この直動案内装置1は、案内レール2と、この案内レール上に転動体(この例では円筒ころ)24を介してスライド移動可能に跨設されるスライダ3とを備えている。
詳しくは、図2に示すように、案内レール2は、その左右側面部に、平面状の転動体軌道面2aが案内レール2の長手方向に沿って形成されている。この例では、転動体軌道面2aは、案内レール2の左右側面部に二条ずつ形成されている。そして、スライダ3には、そのスライダ本体4の左側内側面部と右側内側面部に、案内レール2の転動体軌道面2aと各々対向する平面状の転動体軌道面3aが形成され、案内レール2及びスライダ3の転動体軌道面2a,3a間に直線状の転動体転動路が形成される。
詳しくは、サイドシール板15は、図6に分解斜視図を示すように、保持板16と、シール部材(サイドシール)17と、カバー18とを有する。カバー18は、金属板(鋼材、アルミ材など)のプレス成形品である。保持板16は、硬質材である合成樹脂(ポリアセタール、ポリアミドなど)の射出成形品である。シール部材17は、軟質材である合成樹脂(ポリエステル系エラストマ、ウレタン系エラストマなど)またはゴム(ニトリルゴム、ふっ素ゴムなど)の射出成形品である。なお、ポリエステル系エラストマの具体的な商品名としては、東洋紡績株式会社のペルプレン(登録商標)EN1000、EN2000、EN3000、EN5000。または、東レ・デュポン株式会社のハイトレル(登録商標)などがある。
同図に示すように、硬質材部分である保持板16の下端には、凸部16aが形成されている。この凸部16aと、シール部材17の終端面17eとによって、アンダーシール10の挿入スリット10sが画成される。これにより、図9に要部斜視図を示すように、この状態では、シール部材17の終端面17eは、エンドキャップ5の底面5tの側に向けて露出している。
図11に、アンダーシール10を装着してサイドシール板15を装着しない状態の要部斜視図を示す。同図に示すように、この状態では、アンダーシール10の端部は、エンドキャップ5の端面から、長手方向(直動方向)に飛び出している。
この直動案内装置1は、図13にも示したように、アンダーシール10が、直動方向の端部に、サイドシール17との間の隙間を封止するようにサイドシール17側に向けて突出形成された隙間封止凸部20を有し、隙間封止凸部20は、アンダーシール10のアンダーリップ10bと隣接して一体に形成されるとともに、サイドシール17のサイドリップ17bの終端面17eに対して隙間なく接触しているので、この隙間封止凸部20の効果により、サイドリップ17bとアンダーリップ10bとの間の、直動方向の端部近傍からの潤滑剤の漏れが防止される。
また、本実施形態では、上述のように、アンダーシール10とシール部材17とは互いに、案内レール2の長手方向(直動方向)には拘束しない別個の部品として備えられているため、製作誤差や使用中の膨潤(潤滑剤による寸法増加)によって、アンダーシール10の長さが直動方向で多少変化しても、アンダーシール10とシール部材17の接触状態が変化しない。したがって、所期の密封状態を維持できる。そのため、アンダーシール10の長さの厳密な管理が不要であり、労力とコストが不要である。
なお、本発明に係る直動案内装置は、上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しなければ種々の変形が可能である。
2 案内レール
3 スライダ
4 スライダ本体
5 エンドキャップ
7 保持器
8 転動体保持窓
9 アッパーシール
10 アンダーシール
10b 弾性リップ部(アンダーリップ)
13 凹条部
14 凸条部
15 サイドシール板
16 保持板
17 シール部材(サイドシール)
17a シール部材の基部
17b サイドリップ
17e 終端面
18 カバー
20 隙間封止凸部
24 転動体
Claims (2)
- 案内レールと、該案内レール上に跨設されるスライダとを備え、前記スライダが、自身左右の袖部の転動体を介して前記案内レール上を直動方向にスライド移動する直動案内装置であって、
前記案内レールとスライダとの摺接部分のシール部材として、前記スライダの直動方向の端面をシールするように前記案内レールの外周に沿って延設されたサイドリップを有するサイドシールと、前記袖部下部のスライダと案内レールとの間の隙間ができる部分をシールするように前記直動方向に沿って延設されたアンダーリップを有するアンダーシールとを別個の部品として備え、
前記アンダーシールは、少なくとも前記直動方向の端部またはその近傍に、前記サイドシールとの間の隙間を封止するように前記サイドシール側に向けて突出形成された隙間封止凸部を有し、
前記隙間封止凸部は、前記アンダーシールのアンダーリップと隣接して一体に形成されるとともに、前記サイドシールのサイドリップの終端面に対して隙間なく接触していることを特徴とする直動案内装置。 - 前記サイドシールは、軟質材部分と硬質材部分とを有し、前記アンダーシールは、前記隙間封止凸部が形成されている前記直動方向の端部またはその近傍の部分が、前記サイドシールの軟質材部分と硬質材部分との間に挟まれていることを特徴とする請求項1に記載の直動案内装置。
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US14/396,860 US9255608B2 (en) | 2012-04-27 | 2013-04-22 | Linear guide apparatus |
CN201380001669.6A CN103620243B (zh) | 2012-04-27 | 2013-04-22 | 直动引导装置 |
JP2014512346A JP5858153B2 (ja) | 2012-04-27 | 2013-04-22 | 直動案内装置 |
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JP (1) | JP5858153B2 (ja) |
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JP5874337B2 (ja) * | 2011-11-16 | 2016-03-02 | 日本精工株式会社 | リニアガイド装置のシール機構 |
CN108518416A (zh) * | 2018-05-07 | 2018-09-11 | 乐清市法特精密机械有限公司 | 金属片式直线导轨滑块 |
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JPH04136317U (ja) * | 1991-06-12 | 1992-12-18 | 光洋精工株式会社 | 直動形ガイド装置 |
JP2011012715A (ja) * | 2009-06-30 | 2011-01-20 | Nippon Thompson Co Ltd | 直動案内ユニット |
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US5087130A (en) * | 1990-03-20 | 1992-02-11 | Nippon Seiko Kabushiki Kaisha | Under seal device of linear movement guide bearing |
JP2931465B2 (ja) * | 1991-12-18 | 1999-08-09 | 日本トムソン株式会社 | 直動転がり案内ユニット |
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JP2563001Y2 (ja) * | 1992-12-17 | 1998-02-18 | 日本トムソン株式会社 | 直動転がり案内ユニット |
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EP0835398B1 (en) * | 1995-06-27 | 2004-11-24 | Kalsi Engineering, Inc. | Skew and twist resistant hydrodynamic rotary shaft seal |
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US7387441B2 (en) * | 2004-08-05 | 2008-06-17 | Nsk Ltd. | Linear guide bearing apparatus |
JP2006064007A (ja) | 2004-08-24 | 2006-03-09 | Nsk Ltd | 直動案内装置 |
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JPH04136317U (ja) * | 1991-06-12 | 1992-12-18 | 光洋精工株式会社 | 直動形ガイド装置 |
JP2011012715A (ja) * | 2009-06-30 | 2011-01-20 | Nippon Thompson Co Ltd | 直動案内ユニット |
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JP5858153B2 (ja) | 2016-02-10 |
US9255608B2 (en) | 2016-02-09 |
CN103620243B (zh) | 2016-02-24 |
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