WO2001053716A1 - Courroie pour transmissions continues - Google Patents
Courroie pour transmissions continues Download PDFInfo
- Publication number
- WO2001053716A1 WO2001053716A1 PCT/JP2000/009148 JP0009148W WO0153716A1 WO 2001053716 A1 WO2001053716 A1 WO 2001053716A1 JP 0009148 W JP0009148 W JP 0009148W WO 0153716 A1 WO0153716 A1 WO 0153716A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- line
- saddle
- metal
- element body
- pair
- 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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G5/00—V-belts, i.e. belts of tapered cross-section
- F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
Definitions
- a pair of left and right ring slots formed in a large number of metal elements are supported by a pair of left and right metal rings each formed by laminating a plurality of endless metal rings, and are wound around a drive pulley and a driven pulley.
- the present invention relates to a belt for a continuously variable transmission that transmits a driving force by being hung.
- the present invention has been made in view of the above circumstances, and has as its object to enhance the durability of a metal element by devising the shape of the lower edge of the element body of the metal element.
- a pair of left and right ring slots formed in a large number of metal elements are respectively supported by a pair of right and left metal ring aggregates in which a plurality of endless metal rings are stacked.
- a belt for a continuously variable transmission that transmits a driving force by being wound around a drive pulley and a driven bully, wherein the metal element includes a neck portion sandwiched between a pair of left and right ring slots, Connected together An element body integrally connected below the neck, a pair of left and right saddle surfaces formed on the upper surface of the element body and supporting the lower surface of the metal ring assembly, and both left and right ends of the element body And a pair of left and right V-faces formed at the lower edge of the element body and formed with a pair of left and right recesses formed on the lower edge of the element main body.
- the element body when a downward load is applied to the outer end d of the saddle surface from the metal ring assembly
- the first line at the lower edge of the element body is determined so that the bending strength of the portion becomes constant in the left-right direction, and the second line connecting the lower end b of the V surface and the inner end c of the saddle surface in a straight line.
- the position of the concave portion is set near the intersection e of the second line and the lower edge of the element main body portion by the first line inside the concave portion, and the element main body portion by the second line outside the concave portion.
- a belt for a continuously variable transmission characterized by a sectioned lower edge is proposed.
- the first line inside the recess at the lower edge of the element body of the metal element is moved to the outer end d of the saddle surface when a downward load is applied from the metal ring assembly to the element body. Since the transverse rupture strength is determined to be constant in the left-right direction, it is possible to prevent the stress from being concentrated on a part of the element body and reducing the durability.
- the second line outside the recess at the lower edge of the element body of the metal element was determined to connect the lower end b of the V surface and the inner end c of the saddle surface in a straight line, the V line of the pulley Even if a load is applied to the metal element, it is possible to prevent an unnecessary moment from being generated on the element body or the saddle surface. Furthermore, by defining the intersection of the first line and the second line so that the angle of the V surface of the metal element does not change, the friction coefficient between the V groove and the pulley is secured, and abnormal wear occurs. Can be effectively prevented.
- the triangle formed by the upper end a of the V plane, the lower end b of the V plane, and the inner end c of the saddle plane is an isosceles triangle having the same length of the side ca and the side cb.
- Belts for continuously variable transmissions are proposed.
- the triangle formed by the upper end a of the V surface, the lower end b of the V surface, and the inner end c of the saddle surface is an isosceles triangle, the triangle acts on the V surface of the element body from the V groove of the pulley.
- the V-plane is moved in parallel by the applied load, thereby ensuring a sufficient friction coefficient between the V-plane and the V-groove of the pulley, and preventing the occurrence of abnormal wear more effectively.
- FIG. 1 is a skeleton diagram of a power transmission system of a vehicle equipped with a continuously variable transmission.
- FIG. 2 is a partial perspective view of a metal belt.
- Fig. 4 is a front view of the metal element
- Fig. 4 is a view in the direction of arrow 4 in Fig. 3
- Figs. 5A and 5B are diagrams showing deformation of the metal element due to a load
- Fig. 6 is a first view of the lower edge of the element body.
- Fig. 7 illustrates the setting method of the line S1
- Fig. 7 illustrates the setting method of the second line S2 at the lower edge of the element body
- FIG. 8 illustrates the relationship between the parallelism of the V-plane and the friction coefficient.
- FIG. 9 is a graph showing the relationship between E and de, and FIGS. 10A and 10B are diagrams for explaining the operation when the position of the inner end c of the saddle surface is moved.
- 1 to 10B show one embodiment of the present invention.
- FIG. 2 shows the definitions of the front-rear direction, the left-right direction, the up-down direction, and the inward and outward directions of the metal element used in this embodiment.
- Fig. 1 shows the schematic structure of a metal belt-type continuously variable transmission T mounted on an automobile.
- the input shaft 3 connected to the crankshaft 1 of the engine E via the damper 2 uses the starting clutch 4 Connected to the drive shaft 5 of the metal belt type continuously variable transmission T via
- the drive pulley 6 provided on the drive shaft 5 includes a fixed pulley half 7 fixed to the drive shaft 5 and a movable pulley half that can be moved toward and away from the fixed pulley half 7.
- the movable side burley half 8 is urged toward the fixed side pulley half 7 by hydraulic pressure acting on the oil chamber 9.
- the driven pulley 11 provided on the driven shaft 10 arranged in parallel with the drive shaft 5 includes a fixed pulley half 12 fixed to the driven shaft 10 and a fixed pulley half A movable pulley half 13 that can be moved toward and away from the movable pulley 13, and the movable pulley half 13 is attached to the fixed pulley half 12 by hydraulic pressure acting on the oil chamber 14. It is energized towards. Between the drive pulley 6 and the driven pulley 1 1 A metal belt 15 supporting a large number of metal elements 32 is wound around the metal ring assemblies 31 and 31 (see FIG. 2). Each metal ring assembly 31 is formed by laminating 12 metal rings 33.
- a forward drive gear 16 and a reverse drive gear 17 are rotatably supported on the driven shaft 10.
- the forward drive gear 16 and the reverse drive gear 17 can be selected by a selector 18.
- An output shaft 19 arranged in parallel with the driven shaft 10 has a forward driven gear 20 coupled to the forward drive gear 16 and a reverse idle gear 21 connected to the reverse drive gear 1.
- the reverse driven gear 22 that is engaged is fixed.
- the rotation of the output shaft 19 is input to the differential 25 via the final drive gear 23 and the final driven gear 24, and is transmitted to the drive wheels W, W via the left and right axles 26, 26. .
- the driving force of Engine E is driven shaft via crankshaft 1, damper 2, input shaft 3, starting clutch 4, drive shaft 5, drive pulley 6, metal belt 15 and driven pulley 11. It is transmitted to 10.
- the driving force of the driven shaft 10 is transmitted to the output shaft 19 via the forward drive gear 16 and the forward driven gear 20 to cause the vehicle to travel forward.
- the driving force of the driven shaft 10 is transmitted to the output shaft 19 via the reverse drive gear 17, the reverse idle gear 21 and the reverse driven gear 22, Drive the vehicle backward.
- the hydraulic control unit which operates the oil pressure acting on the oil chamber 9 of the drive pulley 6 and the oil chamber 14 of the drive pulley 11 of the metal belt type continuously variable transmission T according to a command from the electronic control unit U1.
- the speed ratio is adjusted steplessly. That is, if the hydraulic pressure acting on the oil chamber 14 of the driven pulley 11 is increased relative to the hydraulic pressure acting on the oil chamber 9 of the drive pulley 6, the groove width of the driven pulley 11 decreases, Since the effective radius increases and the groove width of the drive pulley 6 increases to decrease the effective radius, the transmission ratio of the metal belt type continuously variable transmission T decreases toward LOW. Change in stages.
- a metal element 32 punched and formed from a metal plate material has a roughly trapezoidal element main body 34 and a pair of left and right metal ring assemblies 31 and 31 fitted together. It comprises a neck portion 36 located between the ring slots 35, 35, and a substantially triangular wire portion 37 connected to the upper portion of the element body portion 34 via the neck portion 36.
- a pair of V-faces 39, 39 that can abut the V-grooves 38, 38 of the drive pulley 6 and the driven pulley 11 are formed at both left and right ends of the element body 34.
- a pair of front and rear main surfaces 40 and 40 are formed on the front side and the rear side of the metal element 32 in the traveling direction and perpendicular to the traveling direction and parallel to each other.
- An inclined surface 42 is formed at the lower part of the cylinder 0 via a locking edge 41 extending in the left-right direction.
- concave and convex engaging portions 43 are formed on the front and rear surfaces of the portion 37, respectively, in order to connect the metal elements 32, 32 adjacent in front and rear.
- the lower and upper edges of the ring slots 35, 35 are referred to as saddle faces 44, 44 and the lower face 45, 45, respectively, and the lower face of the metal ring assembly 31, 31, 31 is the saddle face 4. 4, 4 Abut on 4.
- the lower edge of the element main body 34 is formed not as a straight line but as a pair of concave portions 46, 46 which are concave upwardly on both left and right sides.
- FIG. 3 shows a load applied to the metal element 32 when the metal belt 15 is wound around the drive pulley 6 and the driven pulley 11.
- Downward loads F 1 and F 1 are applied to the left and right saddle surfaces 4 4 and 4 4 of the metal element 3 2 by the tension of the metal ring assemblies 31 and 31, and the left and right V surfaces 3 of the metal element 3 2
- Loads F 2 and F 2 are applied to the drive pulleys 11 and 9 from the V-grooves 38 and 38 of the driven pulley 11.
- the upper ends of the surfaces 39, 39 are a, a
- the lower ends are b, b
- the inner ends of the saddle surfaces 44, 44 are c, c
- the outer ends are d, d.
- the upper ends a, a of the V-planes 39, 39 substantially coincide with the outer ends d, d of the saddle surfaces 44, 44.
- the metal element 32 is deformed, and the angles of the V-planes 39 and 39 are changed. If the angle of the V-grooves 38, 38 of the drive pulley 6 or the driven pulley 11 is significantly different, the V-faces 39, 39 of the metal element 32 and the V-grooves 38, 38 of the drive pulley 6 or the driven pulley 11 will be different. There is a problem that undulations occur between them and cause abnormal wear. On the other hand, even if the metal element 32 is deformed as shown in FIG. 5B, the angle of the V-plane 39, 39 is parallel to the angle of the groove 38, 38 of the driven pulley 11 with the drive pulley 6 angle. By moving, the occurrence of the abnormal wear can be prevented.
- E 1 in Fig. 5B is the fulcrum of the sum of the moments acting on the saddle surfaces 44, 44
- the symbol soil is the direction of the moment acting on the saddle surfaces 44, 44
- E is the distance between c E l
- de is In order to minimize the effect of the sum of the moments acting on the saddle surfaces 44, 44, which indicates the distance between Oe, the concave portion should be taken into consideration when the predetermined angle exists on the V surfaces 39, 39 of the metal element 32. It is desirable that the position e of 46, 46 be near the intersection of the first line S1 and the straight line of the bow I parallel to the V plane 39, 39 from the point E1. Because the fulcrum of the sum of the moments acting on the ⁇ e line is the e point.
- the saddle surfaces 44 and 44 Load acts on the whole area.
- the mouth ring is generated at the moment when the metal element 32 enters the drive pulley 6 or the driven pulley 11, the metal ring aggregates 31, 3 1 are formed on the outer ends d, d of the saddle surfaces 44, 44.
- the loads F 1 and F 1 are concentrated and the bending stress acting on the element 32 increases.
- the element body portion 34 extending from the neck portion 36 of the metal element 32 in the left-right direction is supported in a cantilever manner in which the height Y in the vertical direction changes in the left-right direction (X-axis direction).
- a concentrated load F1 is applied to its free end (the end of a cantilever beam of length L).
- the height of the fixed end of the cantilever beam is Yr.
- the height Y of the cantilever beam is defined as a function of X,
- the second line S2 connected in a straight line has c ', c' further inside the inner ends c, c of the saddle surfaces 44, 44 and the lower end of the surfaces 39, 39.
- the second line S 2 ′ which connects the straight line and b with each other, a further moment is generated at the center of the element body 34, so that the value of the fixed end height Yr described in the above equation (1) is obtained. Must be increased to account for this moment. Also, as shown in FIG.
- the second line S 2 outside the element body portion 34 of the metal element 32 is formed between the lower ends 13 and b of the surfaces 39 and 39 and the saddle surfaces 44 and 44. It is composed of a part of a straight line connecting ends c and c. Then, recesses 46, 46 at the lower edge of the element body 34 are formed near point e, which is the intersection of the first line S1 and the second line S2.
- the element main body 34 of the metal element 32 of this embodiment has the inner ends c and c of the saddle surfaces 44 and 44, the upper ends of the surfaces 39 and 39, a and V surfaces 39. , 39 form the isosceles triangle, and the surfaces 39, 39 form the base a. Therefore, the vertex c is located on the perpendicular bisector of the base ab, and the side ca (that is, saddle) is No large moment is generated on the screw surfaces 44, 44) (see Figs. 5A and 5B). As described above, according to the present embodiment, the bending of the saddle surfaces 44, 44 can be suppressed by the load F2 uniformly applied to the surfaces 39, 39.
- the shape of the first line S 1 inside the recesses 46, 46 makes the bending strength of the element body 34 of the metal element 32 uniform in the left-right direction of the metal element 32, and It is possible to prevent stress from being concentrated on a part of 34 and contribute to improvement of durability.
- the shape of the second line S2 outside the recesses 46, 46 prevents the generation of an extra moment on the center of the element main body 34, or on the saddle surfaces 44, 44 and makes it durable. It can contribute to improvement of the performance.
- the V-grooves 38, 38 are evenly brought into contact with each other to prevent abnormal wear, and the pulleys 5, 1 1
- the friction coefficient between the V-grooves 38, 38 of the metal element 32 and the V-planes 39, 39 of the metal element 32 can be sufficiently ensured.
- the lower shape of the metal element 32 is originally a left-right symmetric curve with respect to the center line CL.
- a parallel line is drawn from the points c and c with respect to the center line CL so that the intersection with the first line S1 is c ′, c ′, and cut so that c ′ and c ′ are straight lines. Desirable in the production of real metal elements 32 and power.
- Fig. 8 shows the parallelism when the V-planes 39, 39 of the element body 34 were moved by the load from the grooves 38, 38 of the pulleys 6, 11, and the V-plane 39, 39
- the relationship between the friction coefficient between the V-grooves 39 and the V-grooves 38, 38 is shown.
- the friction coefficient decreases as the parallelism between the V-faces 39, 39 decreases. According to the present embodiment, a sufficient degree of friction can be secured by keeping the parallelism in the range of -1 to +1.
- the belt for a continuously variable transmission according to the present invention can be suitably used for a belt-type continuously variable transmission for automobiles. It can also be used.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/926,158 US6832967B2 (en) | 2000-01-17 | 2000-12-22 | Belt for non-stage transmissions |
EP00985837A EP1162387B1 (en) | 2000-01-17 | 2000-12-22 | Belt for non-stage transmissions |
BRPI0009072-7A BR0009072B1 (pt) | 2000-01-17 | 2000-12-22 | correia para transmissço continuamente variÁvel. |
CA002365185A CA2365185C (en) | 2000-01-17 | 2000-12-22 | Belt for continuously variable transmission |
DE60033792T DE60033792T2 (de) | 2000-01-17 | 2000-12-22 | Riemen für stufenlos regelbares getriebe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000010243A JP3669680B2 (ja) | 2000-01-17 | 2000-01-17 | 無段変速機用ベルト |
JP2000-10243 | 2000-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001053716A1 true WO2001053716A1 (fr) | 2001-07-26 |
Family
ID=18538278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/009148 WO2001053716A1 (fr) | 2000-01-17 | 2000-12-22 | Courroie pour transmissions continues |
Country Status (8)
Country | Link |
---|---|
US (1) | US6832967B2 (ja) |
EP (1) | EP1162387B1 (ja) |
JP (1) | JP3669680B2 (ja) |
CN (1) | CN1105838C (ja) |
BR (1) | BR0009072B1 (ja) |
CA (1) | CA2365185C (ja) |
DE (1) | DE60033792T2 (ja) |
WO (1) | WO2001053716A1 (ja) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4065139B2 (ja) * | 2002-03-28 | 2008-03-19 | 本田技研工業株式会社 | ベルト式無段変速機 |
JP3973606B2 (ja) * | 2003-07-04 | 2007-09-12 | 本田技研工業株式会社 | 無段変速機用ベルト |
NL1023858C2 (nl) * | 2003-07-08 | 2005-01-11 | Doornes Transmissie Bv | Drijfriem met dwarselementen en een bandpakket. |
EP1544502B1 (en) * | 2003-12-18 | 2011-08-10 | Robert Bosch Gmbh | Drive belt |
JP4129448B2 (ja) * | 2004-10-08 | 2008-08-06 | 本田技研工業株式会社 | 無段変速機用ベルト |
JP2006112485A (ja) * | 2004-10-13 | 2006-04-27 | Toyota Motor Corp | 無端金属ベルトおよびその製造方法ならびに無段変速機 |
CN101151520B (zh) * | 2005-04-01 | 2011-05-25 | 罗伯特·博世有限公司 | 推型带制造过程中的质量监测方法 |
JP5061685B2 (ja) * | 2007-03-28 | 2012-10-31 | トヨタ自動車株式会社 | 無段変速機用ベルトおよびベルト式無段変速機 |
WO2010034320A2 (en) * | 2007-12-24 | 2010-04-01 | Robert Bosch Gmbh | Drive belt |
JP5174725B2 (ja) * | 2009-03-16 | 2013-04-03 | 本田技研工業株式会社 | リング用支持装置 |
CN102667232B (zh) * | 2009-11-19 | 2014-07-23 | 丰田自动车株式会社 | 传动带 |
US20120283059A1 (en) * | 2009-12-26 | 2012-11-08 | Satoru Ando | Elements of vehicular continuously variable transmission belt, and method of manufacturing the elements |
US8769518B1 (en) | 2010-06-29 | 2014-07-01 | Ca, Inc. | Ensuring determinism during programmatic replay in a virtual machine |
WO2012131841A1 (ja) * | 2011-03-25 | 2012-10-04 | トヨタ自動車株式会社 | 伝動ベルト |
WO2012164639A1 (ja) * | 2011-05-27 | 2012-12-06 | トヨタ自動車株式会社 | 伝動ベルトおよび伝動ベルトの組付方法 |
JP5304917B2 (ja) * | 2012-03-30 | 2013-10-02 | トヨタ自動車株式会社 | ベルト式無段変速機 |
WO2014080517A1 (ja) * | 2012-11-26 | 2014-05-30 | トヨタ自動車株式会社 | 無段変速機用ベルト及びその製造方法 |
NL1039980C2 (en) * | 2012-12-28 | 2014-07-03 | Bosch Gmbh Robert | Transverse segment for a drive belt with a carrier ring and multiple transverse segments. |
CN105264261B (zh) * | 2013-06-04 | 2017-05-24 | 本田技研工业株式会社 | 无级变速器用金属带 |
JP6506062B2 (ja) * | 2015-03-24 | 2019-04-24 | 本田技研工業株式会社 | 無段変速機用金属エレメントの製造方法 |
JP6444355B2 (ja) * | 2016-11-04 | 2018-12-26 | 本田技研工業株式会社 | 無段変速機用金属エレメントおよび無段変速機用金属エレメントの製造方法 |
Citations (4)
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JPS63115653U (ja) * | 1987-01-22 | 1988-07-26 | ||
JPS6340979B2 (ja) * | 1980-10-09 | 1988-08-15 | Aishin Ei Daburyu Kk | |
US4915677A (en) | 1987-08-13 | 1990-04-10 | Hutchinson | Force resolving V belt |
JPH06340979A (ja) | 1993-06-01 | 1994-12-13 | Murata Mfg Co Ltd | 無電解銅めっき浴 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6340979A (ja) | 1986-08-05 | 1988-02-22 | Fujitsu Ltd | 隠線処理方式 |
NL8700156A (nl) * | 1987-01-23 | 1988-08-16 | Doornes Transmissie Bv | Drijfriem, dwarselement voor een drijfriem en werkwijze en inrichting voor de vervaardiging daarvan. |
JP3126811B2 (ja) * | 1992-06-16 | 2001-01-22 | 本田技研工業株式会社 | 金属vベルトの作用力検出用金属ブロックおよびこれを用いた作用力検出装置 |
JP3319995B2 (ja) | 1997-10-14 | 2002-09-03 | 本田技研工業株式会社 | 無段変速機用ベルト |
JP3901356B2 (ja) * | 1998-09-02 | 2007-04-04 | 本田技研工業株式会社 | 無段変速機用ベルト |
JP3715126B2 (ja) * | 1998-04-10 | 2005-11-09 | 本田技研工業株式会社 | 無段変速機用ベルト |
ES2189083T3 (es) * | 1998-07-30 | 2003-07-01 | Doornes Transmissie Bv | Correa de transmision. |
JP2000193041A (ja) * | 1998-12-24 | 2000-07-14 | Honda Motor Co Ltd | 金属vベルト |
JP4505068B2 (ja) * | 1999-01-08 | 2010-07-14 | 本田技研工業株式会社 | 金属ベルト |
-
2000
- 2000-01-17 JP JP2000010243A patent/JP3669680B2/ja not_active Expired - Fee Related
- 2000-12-22 DE DE60033792T patent/DE60033792T2/de not_active Expired - Lifetime
- 2000-12-22 WO PCT/JP2000/009148 patent/WO2001053716A1/ja active IP Right Grant
- 2000-12-22 CA CA002365185A patent/CA2365185C/en not_active Expired - Fee Related
- 2000-12-22 CN CN00806438A patent/CN1105838C/zh not_active Expired - Fee Related
- 2000-12-22 BR BRPI0009072-7A patent/BR0009072B1/pt not_active IP Right Cessation
- 2000-12-22 EP EP00985837A patent/EP1162387B1/en not_active Expired - Lifetime
- 2000-12-22 US US09/926,158 patent/US6832967B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6340979B2 (ja) * | 1980-10-09 | 1988-08-15 | Aishin Ei Daburyu Kk | |
JPS63115653U (ja) * | 1987-01-22 | 1988-07-26 | ||
US4915677A (en) | 1987-08-13 | 1990-04-10 | Hutchinson | Force resolving V belt |
JPH06340979A (ja) | 1993-06-01 | 1994-12-13 | Murata Mfg Co Ltd | 無電解銅めっき浴 |
Non-Patent Citations (1)
Title |
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See also references of EP1162387A4 |
Also Published As
Publication number | Publication date |
---|---|
EP1162387B1 (en) | 2007-03-07 |
BR0009072A (pt) | 2001-12-26 |
CA2365185C (en) | 2004-08-31 |
JP2001200895A (ja) | 2001-07-27 |
CN1105838C (zh) | 2003-04-16 |
JP3669680B2 (ja) | 2005-07-13 |
DE60033792T2 (de) | 2007-06-28 |
US6832967B2 (en) | 2004-12-21 |
EP1162387A1 (en) | 2001-12-12 |
US20020160872A1 (en) | 2002-10-31 |
EP1162387A4 (en) | 2006-06-14 |
BR0009072B1 (pt) | 2008-11-18 |
CN1347481A (zh) | 2002-05-01 |
CA2365185A1 (en) | 2001-07-26 |
DE60033792D1 (de) | 2007-04-19 |
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