WO2007148570A1 - 自在継手用ブーツ - Google Patents
自在継手用ブーツ Download PDFInfo
- Publication number
- WO2007148570A1 WO2007148570A1 PCT/JP2007/061856 JP2007061856W WO2007148570A1 WO 2007148570 A1 WO2007148570 A1 WO 2007148570A1 JP 2007061856 W JP2007061856 W JP 2007061856W WO 2007148570 A1 WO2007148570 A1 WO 2007148570A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diameter cylindrical
- universal joint
- boot
- valley
- small
- 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
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
- F16J3/041—Non-metallic bellows
- F16J3/043—Non-metallic bellows with particular means for limiting wear
Definitions
- the present invention connects a large-diameter cylindrical portion into which an outer member of a universal joint is inserted, a small-diameter cylindrical portion into which a shaft member of the universal joint is inserted, and the large-diameter cylindrical portion and the small-diameter cylindrical portion.
- the present invention relates to a universal joint boot provided with a bellows portion that decreases in diameter from the large-diameter cylindrical portion toward the small-diameter cylindrical portion.
- a constant velocity joint used for a vehicle such as an automobile
- the constant velocity joint has a flexible boot made of rubber or resin.
- the boot connects the large-diameter cylindrical portion to which an outer member (outer ring) is inserted and fixed, the small-diameter cylindrical portion to which the shaft member is inserted and fixed, and the large-diameter cylindrical portion and the small-diameter cylindrical portion.
- a bellows portion in which a plurality of peak portions and valley portions are alternately provided is provided integrally.
- the flexible boot disclosed in Japanese Patent Laid-Open No. 10-299789 is provided at an intermediate bellows portion 1 and at both ends of the bellows portion 1, as shown in FIG. It has a small-diameter attachment part 2 and a large-diameter attachment part 3.
- the first mountain la, the first valley lb, the second mountain lc, the second valley ld, the third mountain le, and the third valley If are continuous from the small diameter attachment portion 2 side.
- the large-diameter mounting portion 3 is fixed to the outer ring of a joint (not shown), while the small-diameter mounting portion 2 is fixed to the shaft.
- the reference position that contacts the end face of the outer ring of the joint is O, and this reference position O force with respect to the distance a to the center of the third mountain le on the large diameter side of the bellows portion 1 Valley 3
- the distance b to the center of If is set to a ratio of 30% to 40%.
- Snake for this Even if the length of the abdomen 1 is shortened, the necessary dimensions for the third valley If are secured, the deformation stress of the third valley If, which is the most deformed during operation, is reduced, and the peaks are contacted during compression. It can be reduced.
- the entire bellows portion 1 is configured to be relatively thick, so that the weight of the flexible boot cannot be easily reduced! /.
- the opening force of the inner peripheral surface of the third crest le on the large diameter side is also set to be considerably larger than the opening angle of the inner peripheral surface of the first crest la on the small diameter side.
- the amount of grease filled inside cannot be reduced.
- the amount of compression in the axial direction of the third ridge le on the large diameter side is particularly small, and the amount of grease cannot be reduced easily.
- the present invention solves this type of problem, and maintains a desired durability, and can easily be reduced in size and weight, and can be constructed economically.
- the purpose is to provide.
- the present invention connects a large-diameter cylindrical portion into which an outer member of a universal joint is inserted, a small-diameter cylindrical portion into which a shaft member of the universal joint is inserted, and the large-diameter cylindrical portion and the small-diameter cylindrical portion.
- the present invention relates to a universal joint boot including a bellows portion that is reduced in diameter from the large-diameter cylindrical portion toward the small-diameter cylindrical portion.
- the bellows portion is provided with a plurality of crest portions and trough portions alternately, and the opening angle of the crest inner peripheral surface on the large diameter cylindrical portion side is the opening angle of the crest inner peripheral surface on the small diameter cylindrical portion side.
- the thickness of the inclined portion connecting the peak portion and the valley portion on the small diameter cylindrical portion side is the thickness of the inclined portion connecting the peak portion and the valley portion on the large diameter cylindrical portion side. It is set thinner than.
- the bellows portion is provided with a plurality of crest portions and trough portions alternately, and the large diameter tube portion side
- the opening angle of the inner peripheral surface of the ridge is set to be smaller than the opening angle of the inner peripheral surface of the ridge on the small-diameter cylindrical portion side, and the peak-valley distance between the peak portion and the valley portion on the small-diameter cylindrical portion side is The length is set shorter than the distance between the crest and trough on the diameter tube side.
- the bellows portion is provided with a plurality of crests and troughs alternately, and the thickness of the inclined portion connecting the crests and troughs on the small diameter tube portion side is the large diameter tube. Is set to be thinner than the thickness of the inclined portion connecting the crest and trough on the side, and the crest and trough distance between the crest and trough on the small-diameter cylindrical portion is The length is set shorter than the distance between the peaks and valleys.
- the bellows portion is provided with a plurality of crest portions and trough portions alternately, and the opening angle of the crest inner peripheral surface on the large diameter tube portion side is within the crest portion on the small diameter tube portion side. It is set smaller than the opening angle of the peripheral surface, and the wall thickness of the inclined part connecting the peak part and the valley part on the small diameter cylinder part side connects the peak part and the valley part on the large diameter cylinder part side. It is set to be thinner than the wall thickness of the inclined portion, and the crest / valley distance between the crest and trough on the small-diameter tube portion side is larger than the crest / valley distance between the crest and trough on the large-diameter tube portion side. It is set to a short length!
- the opening angle of the ridge inner peripheral surface on the large diameter cylindrical portion side is set smaller than the opening angle of the ridge inner peripheral surface on the small diameter cylindrical portion side. For this reason, when a pressing force is applied to the boot in the axial direction, it is compressed in the axial direction so that the peak portion on the large-diameter cylindrical portion side is crushed. Therefore, the volume in the boot is reduced, and the amount of grease filled in the boot is favorably reduced, which is economical.
- the thickness of the inclined portion connecting the peak portion and the valley portion on the small diameter cylindrical portion side is the thickness of the inclined portion connecting the peak portion and the valley portion on the large diameter cylindrical portion side. It is set thinner than. As a result, when the boot is compressed, the bellows portion itself can be prevented from sliding and wearing, and the entire boot can be reliably reduced in weight and economical.
- the crest / valley distance between the crest and trough on the small-diameter tube portion side is set shorter than the crest / valley distance between the crest and trough on the large-diameter tube portion side. Yes. For this reason, the boot can be reduced in size well, and the amount of grease to be filled can be easily reduced.
- Fig. 1 shows a state in which a boot according to an embodiment of the present invention is attached to a constant velocity joint. It is explanatory drawing.
- FIG. 2 is a configuration explanatory view of the boot before being attached to the constant velocity joint.
- FIG. 3 is a comparative explanatory view of the boot and a conventional boot.
- FIG. 4 is an explanatory diagram of the flexible boot disclosed in Japanese Patent Laid-Open Nos. 10-299789 and 10-299788.
- FIG. 1 is an explanatory view showing a state in which a universal joint boot 10 according to an embodiment of the present invention is attached to a universal joint, for example, a constant velocity joint 12, and FIG. 2 shows the constant velocity joint 12.
- FIG. 2 is a configuration explanatory view of the boot 10 before being attached to the vehicle, that is, in a state where no external force is applied.
- the constant velocity joint 12 includes an outer member 14 that is an outer ring portion, and a shaft member 16 that is tiltably connected to the outer member 14.
- the boot 10 is made of rubber or resin, and has a large-diameter cylindrical portion 18 into which the outer member 14 is inserted, a small-diameter cylindrical portion 20 into which the shaft member 16 is inserted, the large-diameter cylindrical portion 18 and the small-diameter A cylindrical portion 20 is connected, and a bellows portion 22 is contracted from the large-diameter cylindrical portion 18 to the small-diameter cylindrical portion 20 by force.
- the bellows portion 22 has a large cylindrical portion 18 side force as well as the first crest portion 24a, the second crest portion 24b, the third crest portion 24c, the fourth crest portion 24d, and the fifth crest portion.
- 24e and 6th peak 24f, 1st trough 26a, 2nd trough 26b, 3rd trough 26c, 4th trough 26d, 5th trough 26e and 6th trough 26f I will.
- the first peak portion 24a to the sixth peak portion 24f and the first valley portion 26a to the sixth valley portion 26f are integrally connected via the inclined portions 28a to 281.
- An opening angle (that is, an angle formed by the inclined portions 28a and 28b) ⁇ 1 of the inner peripheral surface of the peak portion of the first peak portion 24a is set.
- the opening angle ⁇ 2 of the ridge inner peripheral surface of the second ridge 24b, the opening angle ⁇ 3 of the ridge inner peripheral surface of the third ridge 24c, and the opening angle ⁇ 3 of the ridge inner peripheral surface of the fourth ridge 24d 4.
- the opening angle ⁇ 5 of the ridge inner peripheral surface of the fifth ridge portion 24e and the opening angle ⁇ 6 of the ridge inner peripheral surface of the sixth ridge portion 24f are set.
- the opening angles ⁇ 1 to ⁇ 3 are set to be smaller than the opening angles ⁇ 4 to ⁇ 6 ( ⁇
- the inclined portions 28a to 281 are set to a predetermined wall thickness tl to tl2.
- the thickness t7 to tl2 on the small diameter cylindrical portion 20 side is the thickness of the inclined portions 28a to 28f on the large diameter cylindrical portion 18 side. It is set thinner than tl to t6 (tl to t6> t7 to tl2).
- the hilly distance of h6 is set.
- Mountain valley distance h4 ⁇ h6 on the small diameter cylinder 20 side is the mountain valley distance hi ⁇ on the large diameter cylinder 18 side! Shorter than ⁇ 3 (hi ⁇ ! i3> h4 ⁇ ! ⁇ 6)
- the boot 10 has a full boot length L in a state where no external force before being attached to the constant velocity joint 12 is applied.
- the boot full length L1 attached to the constant velocity joint 12 is compressed within a range of 83% to 90% with respect to the boot full length L.
- the large-diameter cylindrical portion 18 is fixed to the outer peripheral surface of the outer member 14 via the band 30. Is done.
- the small diameter cylindrical portion 20 of the boot 10 is fixed to the outer peripheral surface of the shaft member 16 through the band 32 in a state where the shaft member 16 is inserted.
- a space 34 is formed in the bellows 22 in a liquid-tight manner, and the space 34 is filled with grease (not shown).
- a large-diameter cylindrical portion 42 and a small-diameter cylindrical portion 44 are integrated via a bellows portion 46.
- the bellows portion 46 has five peak portions 48 and five valley portions 50 which are general shapes alternately, and the opening angle of the inner peripheral surface of each peak portion 48 is a constant angle. It is set.
- the thickness of the inclined portion connecting each peak 48 and each valley 50 is set to a constant value, and the distance between the peaks 48 and the valley 50 is set to a constant distance.
- the boot 10 according to the present embodiment has a six mountain shape of a first mountain portion 24a to a sixth mountain portion 24 4f, and a first valley portion 26a to a sixth valley. It has a 6-valley shape with part 26f. For this reason, the compression ratio in the axial direction (arrow A direction) can be set larger than that of the conventional boot 40.
- the volume of the space portion 34 formed in the bellows portion 22 can be significantly reduced, and the amount of grease filled in the space portion 34 can be reduced. Reduced and economical.
- the opening angles ⁇ 1 to ⁇ 3 of the inner peripheral surfaces of the first crest portion 24a to the third crest portion 24c on the large diameter cylindrical portion 18 side are the first opening portions ⁇ 1 to ⁇ 3 on the small diameter cylindrical portion 20 side. 4 crests 24d to 6 crests 24f crest
- the opening angle of the inner peripheral surface is set smaller than ⁇ 4 to ⁇ 6. For this reason, when a pressing force is applied to the boot 10 in the axial direction, the first ridge portion 24a to the third ridge portion 24c set at a relatively small opening angle are crushed and compressed in the axial direction. Is done.
- the volume of the space portion 34 in the bellows portion 22 is significantly reduced, and the amount of grease filled in the space portion 34 is favorably reduced, which is economical.
- the amount of grease filled in the bellows portion 46 of the conventional boot 40 can be reduced by about 25%.
- the thicknesses T7 to T12 of the inclined portions 28g to 281 on the small diameter cylindrical portion 44 side are compared with the thicknesses ⁇ 1 to ⁇ 6 of the inclined portions 28a to 28f on the large diameter cylindrical portion 18 side. Is set thinly. Accordingly, when the boot 10 is compressed, it is possible to prevent the bellows portion 22 itself from sliding and wearing, and the entire boot 10 can be reliably reduced in weight. Specifically, the weight is reduced by about 15% compared to the conventional boot 40, which is economical.
- the distance between the peaks and valleys h4 ⁇ ! ⁇ 6 is Yamaya distance hi ⁇ on the 18th side of the large-diameter tube section! Shorter than ⁇ 3.
- the bellows portion 22 is configured to have a six-ridge shape having the first peak portion 24a to the sixth peak portion 24f.
- the present invention is not limited to this.
- it can be set to five mountain shapes, or can be set to seven mountain shapes or more.
- the opening angle ⁇ 1 of the inner peripheral surface of the peak portion of the first peak portion 24a is set to the fourth peak portion 24d to the sixth peak portion.
- the opening angle of the inner peripheral surface of 24 f may be set smaller than ⁇ 4 to ⁇ 6.
- the thickness of one or more inclined portions that are particularly prone to sliding may be set thinner than the thickness tl to t6 of the inclined portions 28a to 28f. Good. Also, Yamatani distance h4 ⁇ ! At least one of ⁇ 6, Yamatani distance hi ⁇ ! It may be set shorter than ⁇ 3.
- the boot 10 is set to a compression ratio of 83% to 90% of the boot full length L1 attached to the constant velocity joint 12 with respect to the boot full length L to which no external force is applied.
- the compression ratio exceeds 91%, the opening angle of the inner peripheral surface of the ridge portion becomes too large, and low temperature buckling and bending fatigue, etc., in which there is almost no margin of the extension side film length, are likely to occur.
- the compression ratio is less than 83%, the contact pressure with the shaft member 16 becomes large, the wear with the shaft member 16 becomes remarkable, and the contact pressure with the bellows portion 22 itself becomes large so that wear and noise are generated. appear.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Diaphragms And Bellows (AREA)
- Sealing Devices (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/308,382 US20100160053A1 (en) | 2006-06-23 | 2007-06-13 | Boot for universal joint |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-173914 | 2006-06-23 | ||
JP2006173914A JP2008002616A (ja) | 2006-06-23 | 2006-06-23 | 自在継手用ブーツ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007148570A1 true WO2007148570A1 (ja) | 2007-12-27 |
Family
ID=38833312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/061856 WO2007148570A1 (ja) | 2006-06-23 | 2007-06-13 | 自在継手用ブーツ |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100160053A1 (ja) |
JP (1) | JP2008002616A (ja) |
CN (1) | CN101484718A (ja) |
WO (1) | WO2007148570A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011158323A1 (ja) * | 2010-06-15 | 2011-12-22 | Ntn株式会社 | 自在継手用ブーツ |
US9394962B2 (en) * | 2013-09-12 | 2016-07-19 | Sumitomo Riko Company Limited | Dust cover |
JP6207310B2 (ja) * | 2013-09-12 | 2017-10-04 | 住友理工株式会社 | ダストカバー |
CN105351381A (zh) * | 2015-12-15 | 2016-02-24 | 天津市环宇橡塑股份有限公司 | 一种带有8波峰结构的驱动轴伸缩端cvj防尘罩 |
JP6884010B2 (ja) * | 2017-03-16 | 2021-06-09 | Ntn株式会社 | 等速自在継手用ブーツ |
CN113819152A (zh) * | 2021-08-30 | 2021-12-21 | 岚图汽车科技有限公司 | 一种紧凑型等速万向节的护套及万向节驱动总成 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04160229A (ja) * | 1990-10-25 | 1992-06-03 | Toyoda Gosei Co Ltd | 等速ジョイント用ブーツ |
JPH0716072U (ja) * | 1993-08-30 | 1995-03-17 | エヌオーケー株式会社 | ブーツ |
JP2004308671A (ja) * | 2003-04-01 | 2004-11-04 | Toyo Tire & Rubber Co Ltd | 樹脂製ジョイントブーツ |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6252220A (ja) * | 1985-08-31 | 1987-03-06 | Toyoda Gosei Co Ltd | 機械軸継手用ブ−ツ |
WO2003023261A1 (de) * | 2001-09-11 | 2003-03-20 | Gkn Automotive Gmbh | Faltenbalg für gleichlaufverschiebegelenke |
-
2006
- 2006-06-23 JP JP2006173914A patent/JP2008002616A/ja active Pending
-
2007
- 2007-06-13 US US12/308,382 patent/US20100160053A1/en not_active Abandoned
- 2007-06-13 WO PCT/JP2007/061856 patent/WO2007148570A1/ja active Application Filing
- 2007-06-13 CN CNA200780023653XA patent/CN101484718A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04160229A (ja) * | 1990-10-25 | 1992-06-03 | Toyoda Gosei Co Ltd | 等速ジョイント用ブーツ |
JPH0716072U (ja) * | 1993-08-30 | 1995-03-17 | エヌオーケー株式会社 | ブーツ |
JP2004308671A (ja) * | 2003-04-01 | 2004-11-04 | Toyo Tire & Rubber Co Ltd | 樹脂製ジョイントブーツ |
Also Published As
Publication number | Publication date |
---|---|
US20100160053A1 (en) | 2010-06-24 |
CN101484718A (zh) | 2009-07-15 |
JP2008002616A (ja) | 2008-01-10 |
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