WO2005028898A1 - 自在継手用ブーツ - Google Patents
自在継手用ブーツ Download PDFInfo
- Publication number
- WO2005028898A1 WO2005028898A1 PCT/JP2004/013518 JP2004013518W WO2005028898A1 WO 2005028898 A1 WO2005028898 A1 WO 2005028898A1 JP 2004013518 W JP2004013518 W JP 2004013518W WO 2005028898 A1 WO2005028898 A1 WO 2005028898A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- boot
- seal lip
- peripheral surface
- inner peripheral
- section
- Prior art date
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
- F16J3/041—Non-metallic bellows
- F16J3/042—Fastening details
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
- F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
- F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S464/00—Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
- Y10S464/904—Homokinetic coupling
Definitions
- the present invention relates to a boot for protecting a movable mechanism, and more particularly, to a universal joint boot for protecting a movable mechanism of a universal joint in an automobile or an industrial machine.
- this type of boot includes a bellows portion that can be stretched and deformed, a large-diameter annular mounting portion formed at one end in the axial direction of the bellows portion, and a small diameter formed at the other end in the axial direction. And an annular mounting portion formed by blow molding using a material such as a thermoplastic elastomer.
- the mounting portion on the large diameter side is clamped and fixed to the outer peripheral surface of the end portion on one shaft side of the two members that can move relatively, and the mounting portion on the small diameter side is fixed.
- the part is fastened and fixed to the outer peripheral surface of the other shaft with another clamp.
- the bellows portion is flexibly deformed by the relative movement between the two members, thereby preventing foreign matter from entering the movable mechanism portion between the two members from the outside, and the movable mechanism portion. This prevents the grease for lubrication filled in the tank from leaking to the outside.
- the outer peripheral shape of the fixed portion of the joint cup to which the boot is attached may be a cylindrical shape, and may have an irregular shape (tripod) shape having three curved concave portions.
- the inner periphery of the fixed portion of the boot is formed in a tripod shape in accordance with the outer shape of the fixed portion of the cup, and the outer periphery of the fixed portion of the boot is formed in a cylindrical shape. Then, the outer periphery of the fixed part of the boot was tightened with a band, and the boot was fixed to the forceps. At this time, the three recesses provided on the outer periphery of the cup fixing portion function as rotation stoppers of the boot with respect to the joint cup.
- Patent Document 1 discloses that the thickness of the large-diameter ring portion 122 is changed while maintaining the shape of the large-diameter ring portion 122 and the outer peripheral surface in the ring shape with respect to the above-described tripod-type cup. Boot opposing the concave portion of the cup and the thin portion 124 facing the circumferential portion of the cup. Is disclosed (see Figure 6).
- the boot 121 is provided with two ribs 126 in the circumferential direction on the inner peripheral surface of the large-diameter ring portion 122. Further, between the ribs 126 provided on the inner peripheral surface of the thick portion 123, a relief groove 127 is formed (FIG. 7 (a)). In the connecting portion 125 connecting the thin portion 124 and the thick portion 123, the recess 128 formed between the ribs 126 is formed shallower than the thickness relief groove 127 in the thick portion 123 (FIG. 7 (b)).
- Patent Document 1 Japanese Utility Model Laid-Open No. 118227
- the boot fixing part when the boot is manufactured by blow molding using an elastic plastic, the dimensional accuracy of the inner periphery, especially of a non-cylindrical shape is inferior. Therefore, in order for the boot fixing part to be in close contact with the cup fixing part without any gap, it is necessary to increase the tightening allowance by the band and to significantly deform the boot. However, in order to do so, the strength of the band had to be increased, and work efficiency when assembling boots to the cup was reduced.
- the present invention has been made in view of the above-described problems of the related art, and an object of the present invention is to provide a universal joint boot having good sealing properties.
- An expandable and contractible cylindrical bellows portion in which a valley portion and a peak portion are continuously formed repetitively, and a case for storing one of two relatively movable members provided at one end of the bellows portion.
- a sheenor lip formed in a circumferential direction of an inner peripheral surface of the attachment portion to which the case is attached;
- the inner peripheral surface includes a convex portion protruding toward the center of the axis of the annular mounting portion, the height of the seal lip decreases from the bottom to the top of the convex portion, and the height of the seal lip decreases.
- the width increases from the bottom to the top of the projection.
- the seal lip is easily deformed at the bottom of the protruding portion where a relatively large gap is likely to be formed between the case and the boot, and the sealing property between the case and the boot is improved. I do.
- an angle formed by a surface located outside the boot and the inner peripheral surface is ⁇ 1
- a surface located inside the boot and the inner peripheral surface are formed.
- the seal lip does not disperse the surface pressure even when the boot is mounted on the case, so that a higher sealing property can be secured.
- the universal joint boot 1 used in the constant velocity joint includes an expandable and contractible cylindrical bellows portion 10 in which a valley portion and a peak portion are continuously formed repetitively, and a bellows portion. And a large-diameter mounting portion 20 provided at one end of the housing 10 and into which a case for housing one of the two members that move relatively is inserted.
- the large-diameter mounting portion 20 is fitted into the outer periphery of the opening of the joint cup (case) 40 that houses one of the two movable members. It is fixed to the cup 40 by the band 30.
- FIG. 1 is a schematic perspective view of the universal joint boot according to the first embodiment as viewed from the large-diameter mounting portion side.
- FIG. 3 is a sectional view taken along line AA, a sectional view taken along line BB, and a sectional view taken along line CC of FIG.
- the large-diameter mounting portion 20 has an irregular (tripod) shape in which the outer peripheral surface 21 is circular and the inner peripheral surface 22 has three curved convex portions 23.
- the convex part 23 protrudes toward the center of the axis of the mounting part.
- the boot 1 according to the present embodiment also has rubber or elastic blasting force. More preferably, a rubber or synthetic resin suitable for molding is selected.
- a plurality of seal lips 24 are provided in the circumferential direction. Further, a groove 25 continuous in the circumferential direction is provided between the seal lips 24.
- FIG. 3 is a longitudinal sectional view of each of the protrusions shown in FIG. 1 at different positions.
- the height of the seal lip 24 decreases from the bottom 23a of the projection 23 toward the top 23b, and the width of the seal lip 24 increases from the bottom 23a of the projection 23 to the top 23b. . More specifically, the seal lip 24 is formed such that the height hA is higher than the height hC at the top 23b and the width WA is narrower than the width WC at the top 23b at the bottom 23a of the projection 23. (See Figures 3 (a) and 3 (c)). Therefore, there is a relatively small gap between the cup 40 and the boot 1. The seal lip 24 is easily deformed at the bottom 23 a of the convex portion 23, which is likely to occur, and the sealing performance with the cup 40 is improved. On the other hand, at the top 23b of the projection 23, the deformation of the seal lip 24 is suppressed, and the tightening force of the band 30 is easily supported.
- the seal lip facing a place where a gap is likely to be formed is easily deformed, and where a large tightening force is hardly generated where a gap is likely to be generated, the seal lip is hardly deformed.
- the groove 25 may be provided over the entire circumference in order to release the deformation of the seal lip 24 in the axial direction of the boot. Thereby, the workability in which the force when tightening the band 30 is not excessively increased can be improved.
- FIG. 4 is a cross-sectional view taken along the line A′—A ′ in FIG. 1 of the universal joint boot according to the second embodiment, and B′—B
- FIG. 4 is a vertical sectional view of each of the protrusions shown in FIG. 1 at different positions.
- the seal lip 34 is formed such that the height hC and the height hA 'at the top 23b are higher at the bottom 23a of the projection 23 and the width WA' is smaller than the width WC 'at the top 23b. (See Figures 4 (a) and 4 (c)). Therefore, the seal lip 34 is easily deformed at the bottom 23a of the convex portion 23 where a gap is relatively easily formed between the cup 40 and the boot 1, and the sealing property between the cup 40 and the cup 40 is improved. On the other hand, the deformation of the seal lip 34 is suppressed at the top 23b of the projection 23, and the tightening force of the band 30 is easily supported. [0032] Normally, the sealing lip is pressed against the mating member by tightening the band 30, and the tip portion is deformed to exhibit sealing performance. May not be uniform. In this case, the surface pressure is dispersed and high airtightness cannot be secured.
- the cross-sectional shape of the seal lip 34 is different from that of the outside of the boot 1 so that the deformation of the seal lip 34 is always deformed in a fixed direction. It is formed so as to be asymmetric with the inner side.
- the angle between the surface 34a located outside the boot 1 and the inner peripheral surface 22 is 01, Assuming that the angle formed by the force between the inner surface 34b and the inner peripheral surface 22 is 0 2, then 0 1 ⁇ 0 2! / ⁇ .
- the seal lip 34 does not disperse the surface pressure, and exhibits a higher sealing property than the seal lip 24 shown in the first embodiment. Can be secured. Further, by setting the values to 0 1 and 0 2, the workability when attaching the cup 40 to the boot 1 is improved, and the sealing performance against grease and the like from inside the boot 1 is improved.
- FIG. 5 is a cross-sectional view taken along the line A′-A ′ in FIG. 1 of the universal joint boot according to the third embodiment.
- the outline of the universal joint boot according to the third embodiment is the same as that of the universal joint boot according to the second embodiment except for seal lips 44 and 44 'and a groove 45 described later, and thus the overall drawing is omitted. .
- the cross-sectional shape of the seal lips 44, 44 'according to the third embodiment differs depending on the force located on the opening side of the boot 1 on the inner peripheral surface of the mounting portion 20 and whether it is located on the opposite side to the opening. Specifically, the shape of the seal lip 44 located on the opening side (outside of the boot 1) of the mounting portion 20 and the shape of the seal lip 44 'located on the side opposite to the opening side (inside of the boot 1) different.
- the seal lip 44 may be provided such that the tip end thereof is deformed toward the outside of the boot 1.
- the seal lip 44 ′ may be provided such that the tip thereof is deformed toward the inside of the boot 1.
- the angle between the surface 44a located outside the boot 1 and the inner peripheral surface 22 is ⁇ 3
- the angle Assuming that the angle formed between the surface 44b and the inner peripheral surface 22 that are located is ⁇ 4, let 0 4 ⁇ 0 3! / ⁇ .
- the angle between the surface 44'a located outside the boot 1 and the inner peripheral surface 22 and the inside of the boot 1 are 0 5 Assuming that the angle between the surface 44'b and the inner peripheral surface 22 is ⁇ 6, it is assumed that 0 5 ⁇ 06! / ⁇ .
- FIG. 1 is a schematic perspective view of the universal joint boot according to Embodiment 1 as viewed from the large-diameter mounting portion side.
- FIG. 2 is an external perspective view showing a state in which the boot according to the embodiment is mounted on a case.
- FIG. 3 is a cross-sectional view taken along line AA, a line B-B, and a line C-C in FIG. 1 of the universal joint boot according to Embodiment 1.
- FIG. 4 is a cross-sectional view taken along a line A′-A ′, a cross-sectional view taken along a line B′-B ′, and a cross-sectional view taken along a line C′C ′ in FIG. 1 of the universal joint boot according to the second embodiment.
- FIG. 5 is a sectional view of the universal joint boot according to Embodiment 3 taken along the line A′-A ′ in FIG. 1.
- FIG. 6 is a front view of the conventional boot for a mechanical shaft coupling as viewed in the axial direction.
- FIG. 7 (a) is a sectional view taken along the line II of the boot shown in FIG. 6.
- FIG. 7 (b) is a sectional view taken along the line II-II shown in FIG. Explanation of symbols
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/572,679 US7582020B2 (en) | 2003-09-19 | 2004-09-16 | Boot for universal joint |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003328368A JP4258329B2 (ja) | 2003-09-19 | 2003-09-19 | 自在継手用ブーツ |
JP2003-328368 | 2003-09-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005028898A1 true WO2005028898A1 (ja) | 2005-03-31 |
Family
ID=34372899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/013518 WO2005028898A1 (ja) | 2003-09-19 | 2004-09-16 | 自在継手用ブーツ |
Country Status (3)
Country | Link |
---|---|
US (1) | US7582020B2 (ja) |
JP (1) | JP4258329B2 (ja) |
WO (1) | WO2005028898A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2890145A1 (fr) * | 2005-09-01 | 2007-03-02 | Gkn Driveline Sa Sa | Soufflet d'etancheite et ensemble correspondant. |
CN100373065C (zh) * | 2005-05-30 | 2008-03-05 | 韩国德尔福汽车系统公司 | 等速接头套 |
WO2008052588A1 (de) * | 2006-11-03 | 2008-05-08 | Gkn Driveline International Gmbh | Dichtungselement mit dichtungslippe für eine gelenkanordnung |
WO2011013433A1 (ja) * | 2009-07-28 | 2011-02-03 | Nok株式会社 | 自在継手用ブーツ |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9651096B2 (en) * | 2008-11-14 | 2017-05-16 | Gkn Driveline North America, Inc. | Tripod seal feature |
DE102012219101A1 (de) * | 2012-10-19 | 2014-04-24 | Zf Friedrichshafen Ag | Gelenkanordnung und Verfahren zum Herstellen einer Gelenkanordnung |
JP5763707B2 (ja) * | 2013-05-27 | 2015-08-12 | 本田技研工業株式会社 | 等速ジョイント用ブーツ |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5844523U (ja) * | 1981-09-21 | 1983-03-25 | トヨタ自動車株式会社 | 自在継手用ブ−ツ |
JPH01118227U (ja) * | 1988-02-03 | 1989-08-10 | ||
JPH0624264U (ja) * | 1992-08-31 | 1994-03-29 | エヌオーケー株式会社 | ブーツ |
JPH0738808U (ja) * | 1993-12-15 | 1995-07-14 | エヌオーケー株式会社 | ブーツ |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5844523A (ja) | 1981-09-09 | 1983-03-15 | Nec Corp | インタ−フエイスアダプタ装置 |
JPH01118227A (ja) | 1987-10-30 | 1989-05-10 | Seiko Epson Corp | 光記録再生装置 |
JPH0624264A (ja) | 1992-07-07 | 1994-02-01 | Suzuki Motor Corp | 車両のシート構造 |
US5529538A (en) * | 1993-04-01 | 1996-06-25 | General Motors Corporation | Boot bushing for constant velocity universal joint |
JP2621764B2 (ja) | 1993-07-22 | 1997-06-18 | 日本電気株式会社 | 映像信号合成装置 |
US6089574A (en) * | 1998-03-11 | 2000-07-18 | Salflex Polymers Ltd. | Boot with insertable bushing |
JP3632568B2 (ja) * | 2000-06-28 | 2005-03-23 | 東洋ゴム工業株式会社 | 等速ジョイント用樹脂製ブーツ |
GB2366338B (en) * | 2000-08-22 | 2003-11-19 | Draftex Ind Ltd | Protective bellows |
DE10322902B4 (de) * | 2003-05-21 | 2010-09-09 | Gkn Driveline International Gmbh | Faltenbalganordnung |
JP4428080B2 (ja) * | 2004-02-23 | 2010-03-10 | Nok株式会社 | ブーツ |
-
2003
- 2003-09-19 JP JP2003328368A patent/JP4258329B2/ja not_active Expired - Fee Related
-
2004
- 2004-09-16 WO PCT/JP2004/013518 patent/WO2005028898A1/ja active Application Filing
- 2004-09-16 US US10/572,679 patent/US7582020B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5844523U (ja) * | 1981-09-21 | 1983-03-25 | トヨタ自動車株式会社 | 自在継手用ブ−ツ |
JPH01118227U (ja) * | 1988-02-03 | 1989-08-10 | ||
JPH0624264U (ja) * | 1992-08-31 | 1994-03-29 | エヌオーケー株式会社 | ブーツ |
JPH0738808U (ja) * | 1993-12-15 | 1995-07-14 | エヌオーケー株式会社 | ブーツ |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100373065C (zh) * | 2005-05-30 | 2008-03-05 | 韩国德尔福汽车系统公司 | 等速接头套 |
FR2890145A1 (fr) * | 2005-09-01 | 2007-03-02 | Gkn Driveline Sa Sa | Soufflet d'etancheite et ensemble correspondant. |
WO2008052588A1 (de) * | 2006-11-03 | 2008-05-08 | Gkn Driveline International Gmbh | Dichtungselement mit dichtungslippe für eine gelenkanordnung |
WO2011013433A1 (ja) * | 2009-07-28 | 2011-02-03 | Nok株式会社 | 自在継手用ブーツ |
Also Published As
Publication number | Publication date |
---|---|
JP2005090709A (ja) | 2005-04-07 |
US7582020B2 (en) | 2009-09-01 |
US20070196165A1 (en) | 2007-08-23 |
JP4258329B2 (ja) | 2009-04-30 |
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