EP0851151A1 - Pulley and manufacturing method of the same - Google Patents

Pulley and manufacturing method of the same Download PDF

Info

Publication number
EP0851151A1
EP0851151A1 EP97310601A EP97310601A EP0851151A1 EP 0851151 A1 EP0851151 A1 EP 0851151A1 EP 97310601 A EP97310601 A EP 97310601A EP 97310601 A EP97310601 A EP 97310601A EP 0851151 A1 EP0851151 A1 EP 0851151A1
Authority
EP
European Patent Office
Prior art keywords
section
web
pulley
inner cylindrical
cylindrical section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97310601A
Other languages
German (de)
English (en)
French (fr)
Inventor
Masakiyo Ohya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jtekt Column Systems Corp
Original Assignee
Fuji Kiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Kiko Co Ltd filed Critical Fuji Kiko Co Ltd
Publication of EP0851151A1 publication Critical patent/EP0851151A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
    • B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/42—Making machine elements wheels; discs pulleys, e.g. cable pulleys

Definitions

  • This invention relates to a pulley having V-shaped grooves on its outer circumference and relates to a manufacturing method of the same.
  • a pulley which was obtained by working a thin iron plate for example, is known. Namely, this pulley is arranged so that a cylindrical bearing section (inner cylindrical section) 1, a web section 2 and a rim section (outer cylindrical section) 3 are formed by bending an iron plate provided as a material by press, etc., and that a plurality of V-shaped grooves 4 are formed on the outer circumference of the rim section 3.
  • the web section 2 is formed by bending the iron plate, one end portions of the bearing section 1 and rim section 3 in the axial direction are cantilevered. Moreover, the V-shaped grooves 4 are formed on the outer circumference of the rim section 3 by compressing the rim section 3 in the axial direction and enlarging its thickness.
  • the bearing section 1 is arranged so that its inner circumferential surface is engaged with a bearing 5.
  • the present invention has been achieved with such points in view.
  • a first aspect of the invention provides a pulley comprising; an inner cylindrical section, a web section which is extended from a central portion in an axial direction of the inner cylindrical section, an outer cylindrical section which is formed at an outer circumferential portion of the web section coaxially with respect to the inner cylindrical section about the web section, and V-shaped grooves which are formed on an outer circumference of the outer cylindrical section are formed integrally by cold working.
  • the web section is formed so that its thickness becomes thicker gradually with directing towards the inner cylindrical section and outer cylindrical section.
  • the inner cylindrical section is formed with a bearing stopper.
  • a fourth aspect of the invention provides a manufacturing method of a pulley, comprising the steps of: forming a web section on a middle portion in a radial direction of a thick ring body by crushing the middle portion by cold working, forming an inner cylindrical section at an inner circumferential portion of the web section, a central portion of the inner cylindrical section being the web section, forming a redundant section at the outer circumferential portion of the web section, a central portion of the redundant section being the web section, and forming an outer cylindrical section having V-shaped grooves on its outer circumferential portion, the outer cylindrical section being formed at the outer circumferential portion of the web section coaxially with respect to the inner cylindrical section about the web section by cold-working V-shaped grooves on an outer circumference of the redundant section.
  • the thick ring body is formed such that a thick circulate plate body is formed by crushing a cylindrical material by cold working, that a circular thin section is formed by crushing a central portion of the thick circular plate body in a circular shape by cold working, and that the circular thin section is blanked by press.
  • the thick ring body is formed by blanking a plate shaped material by press.
  • the web section is formed by crushing a central portion in a radial direction of the thick ring body by cold working so that its thickness becomes thicker gradually with directing towards the inner cylindrical section and outer cylindrical section.
  • the web section connects the central portion of the inner cylindrical section with the central portion of the outer cylindrical portion, even if tension of the belt is applied to the V-shaped grooves, bending moment generated by the tension is small. Further, since the tension is applied to the outer cylindrical section symmetrically with respect to the web section, the bending moment can be prevented from being applied to the web section and inner cylindrical section. Therefore, the whole portion is extremely difficult to deflect, so vibration and noise due to the deflection can be reduced, and the durability can be improved.
  • the web section is formed so that its thickness becomes thicker gradually with directing towards the inner cylindrical section and outer cylindrical section, rigidity of a connecting portion between the web section and inner cylindrical section and a connecting portion between the web section and outer cylindrical section can be improved, and strength and durability can be improved.
  • the pulley has an integral bearing stopper.
  • the durability can be improved.
  • the thickness of the whole portion can be thin, light-weighting and miniaturization can be realized.
  • the finishing step for example, can be omitted, and the cost can be reduced.
  • the outer cylindrical section can be formed so as to have an enough thickness to form V-shaped grooves as a redundant section, the step of increasing a thickness which is shown in the conventional example is not required. Therefore, the manufacturing steps can be simplified, and the productivity can be improved and the cost can be reduced.
  • the thick ring body is formed by cold-working a cylindrical material, yield is improved by cold forging, and material costs can be reduced, thereby making it possible to reduce the cost.
  • the thick ring body is formed by blanking a plate-shaped material by press, the productivity can be improved, and the cost can be reduced.
  • the seventh aspect when the web section is cold-worked, a material positioned in the web section is easy to flow to the inner cylindrical section and outer cylindrical section. Therefore, a force and time required for the cold working can be reduced.
  • FIGs. 2 through 9 show the first embodiment
  • FIGs. 10 through 12 show the second embodiment
  • FIGs. 13 through 16 show the third embodiment
  • FIGs. 17 and 18 show the fourth embodiment.
  • a pulley 10 in the first embodiment is obtained by forming a bearing section (inner cylindrical section) 11 formed in a cylindrical shape, a web section 12 which is extended from a central portion of the bearing section 11 in the axial direction to the outside radially, a cylindrical rim section (outer cylindrical section) 13 which is formed at the outer circumferential portion of the web section 12 coaxially with respect to the bearing section 11 about the web section 12, and V-shaped grooves 14 which are formed on the outer circumference of the rim section 13.
  • the bearing section 11, web section 12, rim section 13 and V-shaped grooves 14 are formed integrally by cold working.
  • a plurality of the V-shaped grooves 14 are so-called poly-V-shaped grooves.
  • the respective V-shaped grooves 14 are formed symmetrically with respect to the web section 12.
  • the inner circumferential surface of the bearing section 11 is engaged with a bearing (not shown) similarly to the conventional example.
  • a cylindrical iron material W1 shown in FIG. 3 is cold-forged (cold-worked) by press so that a thick circular plate W2 shown in FIG. 4 is formed.
  • a central portion of the thick circular plate W2 is crushed in a circular shape from the top and bottom surfaces by the cold forging using press, and a circular thin section W2a is formed.
  • the circular thin section W2 is blanked by press so that a thick ring body W3 is formed.
  • a middle portion of the thick ring body W3 in a radial direction is crushed from the top and bottom surfaces by the cold forging using press so that the bearing section 1 1 is formed on the inner circumference of the thick ring body W3, the web section 12 is formed on the middle portion and a redundant section W4a used for forming the rim section 13 is formed on the outer circumference.
  • a rough shaped section W4 of the pulley is formed.
  • the rough shaped section W4 is cold-forged by a bottom die M1, top die M2, inner circumference holding die M3 and outer circumference holding die M4.
  • the rim section 13 can be formed so as to have an enough thickness to form the V-shaped groove 14 as the redundant section W4a, the step of increasing a thickness in the conventional example is not required. Therefore, the cost can be reduced. Moreover, since the yield is improved by the cold forging, the material costs can be reduced.
  • an annular stopper 11a which is bent from one end in its axial direction towards the inner side is formed at the bearing section 11.
  • the stopper 11a is formed by cold forging at the step of forming the rough shaped section W4 of the pulley.
  • the rim section 13 and V-shaped grooves 14 are formed by the roller die M8 with the bearing section 11 including the stopper 11a and the web section 12 being held by the dies M5, M6 and M7.
  • the pulley 10 structured in the above manner since the rough shaped section W4 of the pulley can be formed by the cold forging and at the same time the inner surface of the bearing section 11 and the stopper 11a can be formed accurately, a bearing is engaged directly with the bearing section 11, and the bearing can be positioned. Therefore, the productivity can be improved.
  • a point of the third embodiment which is different from the first embodiment is that the thickness of the web section 12 becomes thicker gradually with directing towards the bearing section 11 and the rim section 13.
  • the web section 12 is formed so that its thickness becomes thicker gradually with directing towards the bearing section 11 and rim section 13 on a circularly arced surface.
  • the web section 12 formed in such a manner, as shown in FIG. 15, is formed by cold forging at the step of forming the rough shaped section W4 of the pulley.
  • the material positioned in the web section 12 is easy to flow to the sides of the bearing section 11 and rim section 13.
  • the rim section 13 and V-shaped grooves 14 are formed by the roller die M8 with the bearing section 11 and web section 12 being held by the dies M5, M6 and M7.
  • the web section 12 is formed so that its thickness becomes thicker gradually with directing towards the bearing section 11 and rim section 13 on a circularly arced surface, when the web section 12 is cold-forged, the material positioned in the web section 12 is easy to flow towards the bearing section 11 and rim section 13. Therefore, a force and time required for cold forging can be reduced. Moreover, since the thickness of a portion requiring strength can be increased easily and the thickness of a portion which does not require strength can be reduced easily, the strength and light-weighting of the pulley 10 can be improved.
  • a plurality of the V-shaped grooves 14 are provided, but only one V-shaped groove 14, namely, a so-called mono-V-shaped groove may be provided.
  • the mono-V-shaped groove is formed symmetrically with respect to the web section 12.
  • the V-shaped grooves 14 may be arranged by combining the mono-V-shaped groove and poly-V-shaped groove. Namely, both the mono-V-shaped groove and poly-V-shaped groove may be provided to the rim section 13.
  • a stopper for a bearing may be provided.
  • a point of the fourth embodiment different from the first embodiment is that the thick ring body W3 is formed by pressing a plate-shaped material W0.
  • the ring-shaped thick ring body W2 is formed by blanking the thick plate-shaped material W0 by press.
  • the rough shaped section W4 of the pulley is formed. Since the forming structure hereafter is the same as that in the first embodiment, the description thereof is omitted.
  • the thick ring body W2 can be formed by blanking the plate-shaped material W0 by press, the thick ring body W2 can be formed only by press. As a result, the manufacturing steps can be simplified, the productivity can be improved, and thus the cost can be reduced.
  • the thick circular plate body W2 obtained when the thick ring body is formed may be broken as scrap, but similarly to the thick circulate plate body W2 shown in the first embodiment, after the central portion of the thick circulate plate body W2 is crushed from the top and bottom surfaces in a circulate shape by cold forging using press and a circular thin section W2a is formed, the thick ring body W3 is formed by blanking the circular thin section W2a using press so as to be used. As a result, the material can be used effectively, and thus the cost can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Forging (AREA)
EP97310601A 1996-12-26 1997-12-24 Pulley and manufacturing method of the same Withdrawn EP0851151A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34794396A JPH10180386A (ja) 1996-12-26 1996-12-26 プーリ及びその製造方法
JP347943/96 1996-12-26

Publications (1)

Publication Number Publication Date
EP0851151A1 true EP0851151A1 (en) 1998-07-01

Family

ID=18393666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97310601A Withdrawn EP0851151A1 (en) 1996-12-26 1997-12-24 Pulley and manufacturing method of the same

Country Status (4)

Country Link
EP (1) EP0851151A1 (ja)
JP (1) JPH10180386A (ja)
AU (1) AU4927097A (ja)
CA (1) CA2225772A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104368735A (zh) * 2014-11-25 2015-02-25 张家港海陆环形锻件有限公司 用于重型矿山车车轮轮毂毛坯锻造的工装
EP2902150A4 (en) * 2012-09-29 2016-05-25 Jinfang Wang PROCESS FOR MANUFACTURING TRAPEZOIDAL GUN PULLEY

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19983158T1 (de) * 1999-02-23 2001-05-10 Kanemitsu Corp Verfahren zur Herstellung eines gewalzten Teils
WO2000061316A1 (fr) * 1999-04-14 2000-10-19 Kanemitsu Corporation Procede de fabrication d'une poulie a plusieurs gorges en v

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807246A (en) * 1973-02-20 1974-04-30 J Mcillwain Work table drive
FR2527953A3 (fr) * 1982-06-02 1983-12-09 Ducellier & Cie Procede d'obtention d'une poulie multi-gorges et poulie ainsi obtenue
US4697445A (en) * 1984-03-07 1987-10-06 Honda Giken Kogyo Kabushiki Kaisha Poly-V pulley formed of sheet metal and method and apparatus for making same
US4767387A (en) * 1983-05-23 1988-08-30 Fuji Kiko Company, Limited Grooved pulley and manufacturing method therefor
US4905361A (en) * 1987-12-04 1990-03-06 Mitsubishi Denki Kabushiki Kaisha Method for manufacturing pulley with a high-friction groove surface
US5163883A (en) * 1991-12-04 1992-11-17 General Motors Corporation Pulley with integral fastener and spacer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807246A (en) * 1973-02-20 1974-04-30 J Mcillwain Work table drive
FR2527953A3 (fr) * 1982-06-02 1983-12-09 Ducellier & Cie Procede d'obtention d'une poulie multi-gorges et poulie ainsi obtenue
US4767387A (en) * 1983-05-23 1988-08-30 Fuji Kiko Company, Limited Grooved pulley and manufacturing method therefor
US4697445A (en) * 1984-03-07 1987-10-06 Honda Giken Kogyo Kabushiki Kaisha Poly-V pulley formed of sheet metal and method and apparatus for making same
US4905361A (en) * 1987-12-04 1990-03-06 Mitsubishi Denki Kabushiki Kaisha Method for manufacturing pulley with a high-friction groove surface
US5163883A (en) * 1991-12-04 1992-11-17 General Motors Corporation Pulley with integral fastener and spacer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2902150A4 (en) * 2012-09-29 2016-05-25 Jinfang Wang PROCESS FOR MANUFACTURING TRAPEZOIDAL GUN PULLEY
CN104368735A (zh) * 2014-11-25 2015-02-25 张家港海陆环形锻件有限公司 用于重型矿山车车轮轮毂毛坯锻造的工装

Also Published As

Publication number Publication date
CA2225772A1 (en) 1998-06-26
JPH10180386A (ja) 1998-07-07
AU4927097A (en) 1998-07-02

Similar Documents

Publication Publication Date Title
EP1566286B1 (en) Race member in hub unit and method of producing the same
US6505973B2 (en) Bearing arrangement and method for fixing at least one bearing in place in a bearing retainer
US7465102B2 (en) Bearing ring and wheel bearing unit
US6701603B2 (en) Method of manufacturing yoke of electric rotating machine
JPH10272903A (ja) 車輪支持用ハブユニット
US7281449B2 (en) Connecting rod and bearing-equipped connecting rod
US4188800A (en) Drive shaft of fan coupling assembly for motor vehicles
US6296320B1 (en) Multi-piece rim type disk wheel and a method for producing the same
EP0851151A1 (en) Pulley and manufacturing method of the same
JP2002235753A (ja) シェル型ころ軸受
US20030084572A1 (en) Spherical bearing and a manufacturing method thereof
JP2873359B2 (ja) スクロール流体機械におけるリテーナリング並びにその製造方法
JP3565939B2 (ja) プーリーの製造方法
JPS5926629A (ja) 電磁クラッチロ−タの成形方法
US12017310B2 (en) Staking assembly, staking assembly manufacturing method, hub unit bearing, hub unit bearing manufacturing method, automobile, and automobile manufacturing method
JPH0459981B2 (ja)
JP2501971Y2 (ja) 多段プ―リ―
JPH04309427A (ja) 筒体とその製造方法
JPH0293156A (ja) 多段プーリおよびその製造方法
JPH0777217A (ja) スラスト玉軸受およびその軌道輪の製造方法
JP4345529B2 (ja) シェル形総ころ軸受の外輪の製造方法
JPS60108130A (ja) 板金製プ−リの製造方法
JPS6246911Y2 (ja)
JP2698343B2 (ja) 多段プーリーおよびその製造法
JPH03249419A (ja) スラスト玉軸受のレースとその製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 19980824

AKX Designation fees paid

Free format text: DE FR GB IT

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20000208

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20000620