EP0509734B1 - Method and apparatus forming a helical spline gear with a stopper on a rotary shaft - Google Patents

Method and apparatus forming a helical spline gear with a stopper on a rotary shaft

Info

Publication number
EP0509734B1
EP0509734B1 EP19920303284 EP92303284A EP0509734B1 EP 0509734 B1 EP0509734 B1 EP 0509734B1 EP 19920303284 EP19920303284 EP 19920303284 EP 92303284 A EP92303284 A EP 92303284A EP 0509734 B1 EP0509734 B1 EP 0509734B1
Authority
EP
European Patent Office
Prior art keywords
helical
pair
teeth
helical teeth
stopper
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.)
Expired - Lifetime
Application number
EP19920303284
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0509734A1 (en
Inventor
Shuzou C/O Mitsubishi Denki K.K. Isozumi
Noriyuki C/O Mitsubishi Denki K.K. Tanaka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0509734A1 publication Critical patent/EP0509734A1/en
Application granted granted Critical
Publication of EP0509734B1 publication Critical patent/EP0509734B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • B21H5/027—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls by rolling using reciprocating flat dies, e.g. racks
    • 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
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls

Definitions

  • This invention relates to a method and apparatus for forming a helical spline gear with a stopper on a rotary shaft, according to the preambles of claims 1 and 6, on which an object to be driven is mounted through the helical splines so as to transmit torque, produce axial thrust, position the object, and prevent the latter from being coming off.
  • a helical spline gear with a stopper is formed on the output shaft of a starter motor.
  • the output shaft of the starter motor is spline-coupled to the sleeve of the clutch outer of the overrunning clutch so that the sleeve is prevented from coming off axially outwardly and held in place by the stopper.
  • a steel rod or the like is formed by cold forging into a shaft 1 to be processed (hereinafter referred to as "a shaft material", when applicable) having a large diameter portion 1a, a small diameter portion 1b, and a stopper portion 2 as shown in FIG. 4A.
  • a shaft material when applicable
  • a plurality of grooves 2a are formed in the stopper portion 2 at equal angular intervals in a circumferential direction.
  • helical grooves 3a the number of which is twice the number of grooves 2a (six helical grooves in the case of FIG.
  • the large diameter portion 1a of the shaft material 1 is set in place and clamped with a pair of component rolling tools with helical teeth at equal angular intervals in a circumferential direction. Under this condition, the pair of rolling tools are driven in the same directions so that the shaft material 1 is rotated under pressure.
  • a rotary shaft 4 which has a helical spline gear 3 with helical grooves 3a the number of which is twice that of the stopper grooves (six helical grooves 3a in the case of FIG. 4). Every other helical grooves 3a, i.e., half of the helical grooves are communicated with the stopper grooves 2a, and the remaining helical grooves are extended to the stopper portion 2.
  • the sleeve of the clutch outer of the over-running clutch has helical teeth in the inner cylindrical wall which are equal in number to the stopper grooves 2a, and are movably engaged with the stopper grooves 2a, respectively.
  • the helical teeth of the sleeve of the clutch outer are engaged with the stopper grooves 2a of the rotary shaft, and then moved past the stopper grooves 2a so that they are disengaged from the latter 2a.
  • the clutch outer is turned as much as one pitch of the helical grooves 3a, and engaged with the respective helical grooves 3a, and then pulled back until the outer end of the helical teeth strikes against the stopper portion 2.
  • the clutch outer is prevented from coming off the,shaft axially outwardly, and is held in place.
  • a steel rod or the like is formed into a shaft material 5 by cold forging to be processed which, as shown in FIG. 5A, has a large diameter portion 5a and a small diameter portion 5b.
  • an annular groove 5c is formed by machining in the large diameter portion 5a at one side, thus forming a stopper protrusion 6.
  • the large diameter portion 5a with the stopper protrusion 6 is clamped with a pair of component rolling tools having a plurality of helical teeth. Under this condition, the pair of rolling tools are driven in the same directions so that the shaft material 5 is rotated under pressure. As a result, as shown in FIG.
  • helical splines 7 with a plurality of helical grooves 7a are formed at equal angular intervals on the large diameter portion 5a.
  • communicating grooves 8a are cut in the stopper protrusion 6 in such a manner that they are communicated with every other helical groove 7a.
  • the remaining portions of the stopper protrusion 6 form stopper portions 8.
  • a rotary shaft 9 has been formed which has the helical splines 7 and the stopper portions 8.
  • the conventional method shown in FIG. 5 is also disadvantageous in that a relatively large number of manufacturing steps are required to form the helical splines 7 and the stopper portions 8, and it is rather troublesome to form the stopper grooves 8a in such a manner that they are communicated with every other helical grooves 7a.
  • the output shaft has a flange which serves as an epicyclic gear arm, the method described with reference to FIG. 4 is not practical. That is, the flange of the output shaft obstructs the cold forging operation shown in FIG. 4B.
  • JP-A-59 209449 discloses a method of and an apparatus for forming a helical spline gear as set out in the preambles of Claim 1 respectively claim 6.
  • an object of this invention is to eliminate the above-described difficulties accompanying a conventional method of forming a helical spline gear with a stopper on a rotary shaft. More specifically, an object of the invention is to provide a method of forming a helical spline gear with a stopper on a rotary shaft which can be practiced without a positioning operation, and in which, when compared with the conventional method, the number of manufacturing steps is reduced; that is, the rotary shaft can be formed readily and quickly. Another object of the invention is to provide an apparatus adapted to be used in the method.
  • a method of forming a helical spline gear with a stopper on a shaft material which has been preliminarily processed, according to the present invention, comprises the steps of:
  • An apparatus for forming a helical spline gear with a stopper on a shaft material comprises a pair of rolling tools adapted to clamp said shaft material therebetween and roll said shaft material under pressure, each of said rolling tools having a plurality of helical teeth formed thereon at equal intervals; characterized in that each rolling tool is further provided with a plurality of merging teeth, each of which merges with a respective one of the said helical teeth falling into a group of the said helical teeth made up of every second one of the said helical teeth.
  • FIG. 1A shows component rolling tools used in an example of a method of forming a helical spline gear with a stopper on a rotary shaft, which constitutes a first embodiment of this invention.
  • reference numeral 10 designates a first rolling roller for forming helical splines.
  • a plurality of helical teeth 10a (six helical teeth in the case of FIG. 1) are formed in the cylindrical wall at equal angular intervals in a circumferential direction.
  • reference numeral 11 designates a second rolling roller for forming a stopper portions and communicating grooves therebetween. Merging teeth 11a are formed on the cylindrical wall which merge with every other helical tooth 10a.
  • FIG. 1B is an unfolding diagram showing the helical teeth 10a of the first rolling roller 10 and the merging teeth 11a of the second rolling roller 11.
  • the first and second rolling rollers 10 and 11 are axially combined, for instance, with bolts, thus forming a rolling tool 12.
  • a pair of the rolling tools 12 thus formed are employed.
  • the first and second rolling rollers 10 and 11 are formed separately. However, those rollers may be formed as one unit, i.e. a single integral unit.
  • a large diameter portion 13a and a small diameter portion 13b are formed on a shaft material 13 by cold forging which is to be processed. If it is difficult to form those portions 13a and 13b by cold forging because a flange is provided at one end, then the portions may be formed by machining.
  • the large diameter portion 13a of the shaft material 13 is clamped between the pair of rolling tools 12, and the rolling tools 12 are rotated in the same direction, i.e. counterclockwise in Fig. 1A, to roll the shaft 13.
  • the distance between the pair of rolling tools 12 is decreased with a force of depression applied thereto so that a helical spline gear with a stopper is formed on the shaft.
  • helical splines 14 with a plurality of helical grooves 14a (six helical grooves in the case of FIG. 2) therebetween, communicating grooves 15a which are communicated with every other helical groove 14a, and stopper portions 15 remaining between the communicating grooves 15a are formed as shown in FIG. 2B.
  • an aimed rotary shaft 16 having the helical splines 14 and the stopper portions 15 has been formed.
  • the shaft material should be processed as follows: That is, in manufacture of a rotary shaft 18, as shown in FIG. 3, the large diameter portion is machined to form an annular groove 17 along the inside of the stopper portions 15.
  • the pair of rolling tools are employed which have the helical teeth 10a and the merging teeth 11a; however, the invention is not limited thereto or thereby. That is, other rolling tools may be employed which can roll the shaft material to form the helical spline gear with the stopper on it in one rolling operation.
  • a component rolling tool in the form of a rack may be employed which has a plurality of helical teeth, and merging teeth which merge with every helical tooth. In this case, too, with the large diameter portion of a shaft material clamped between a pair of the rolling tools thus formed, the latter are driven to turn the shaft under pressure, to form a helical spline gear with a stopper on it.
  • the large diameter portion of the shaft material is clamped between one pair of rolling tools each having on the outer cylindrical wall a plurality of helical teeth, and merging teeth provided ahead of the helical teeth in such a manner that the merging teeth merge with every other helical teeth, and the rolling tools are driven to roll the shaft material under pressure, to form on the large diameter portion a plurality of helical grooves, and ahead of the helical grooves communicating grooves communicated with every other helical grooves, and stopper portions remaining between the communicating grooves. That is, according to the invention, a helical spline gear with a stopper can be formed on the shaft in one rolling operation readily and quickly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Gears, Cams (AREA)
EP19920303284 1991-04-15 1992-04-13 Method and apparatus forming a helical spline gear with a stopper on a rotary shaft Expired - Lifetime EP0509734B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP110951/91 1991-04-15
JP3110951A JP2555486B2 (ja) 1991-04-15 1991-04-15 回転軸のストッパ付ヘリカルスプライン形成方法

Publications (2)

Publication Number Publication Date
EP0509734A1 EP0509734A1 (en) 1992-10-21
EP0509734B1 true EP0509734B1 (en) 1995-06-21

Family

ID=14548677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920303284 Expired - Lifetime EP0509734B1 (en) 1991-04-15 1992-04-13 Method and apparatus forming a helical spline gear with a stopper on a rotary shaft

Country Status (4)

Country Link
EP (1) EP0509734B1 (xx)
JP (1) JP2555486B2 (xx)
DE (1) DE4212650C2 (xx)
HK (1) HK1006686A1 (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102989938B (zh) * 2012-11-17 2016-09-21 山东省青岛生建机械厂 花键冷敲机

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5659955A (en) * 1994-01-21 1997-08-26 Plamper; Gerhard Method of making powder metal helical gears
DE19520699A1 (de) * 1995-06-07 1996-12-12 Bad Dueben Profilwalzmaschinen Rollwerkzeug zum Walzen eines mehrgängigen Steigungsprofils
FR2745855B1 (fr) * 1996-03-08 1998-04-10 Valeo Equip Electr Moteur Demarreur de vehicule automobile comportant des moyens de butee perfectionnes pour son entraineur
US6169333B1 (en) * 1997-10-06 2001-01-02 Visteon Global Technologies, Inc. Starter motor drive stop
KR20000051815A (ko) * 1999-01-27 2000-08-16 에릭 발리베 스톱퍼가 형성된 스타터의 스플라인 제조방법
KR100443883B1 (ko) * 2000-11-24 2004-08-09 주식회사 만도 이형 치형 동시 전조장치
CN101767117B (zh) * 2008-12-31 2014-05-21 江苏汤臣汽车零部件有限公司 一种汽车制动器凸轮轴花键的加工设备
PL216309B1 (pl) * 2010-08-30 2014-03-31 Lubelska Polt Sposób kształtowania plastycznego wałków z wieńcami zębatymi
JP2016205265A (ja) * 2015-04-24 2016-12-08 三菱電機株式会社 トルク伝達装置及びその製造方法
KR101718334B1 (ko) * 2015-07-24 2017-03-21 성국태 차량 시트용 리클라이너 샤프트
CN108188313A (zh) * 2017-11-29 2018-06-22 江阴市永兴机械制造有限公司 一种大直径外花键二次冷挤压成形工艺

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062077A (en) * 1957-09-16 1962-11-06 Michigan Tool Co Method and apparatus for effecting a one-location assembly
US3531976A (en) * 1967-11-27 1970-10-06 Ford Motor Co Cold rolling of fine pitch herringbone gears
JPS5372780A (en) * 1976-12-11 1978-06-28 Reiji Ikawa Packing material
JPS5823501B2 (ja) * 1978-07-05 1983-05-16 株式会社日立製作所 クラツチ機構を有する始動電動機
JPS5553727Y2 (xx) * 1979-04-18 1980-12-12
JPS59209449A (ja) * 1983-05-11 1984-11-28 Toyota Motor Corp 転造方法
US4741191A (en) * 1985-06-12 1988-05-03 Anderson-Cook, Inc. Method for splining and flanging thin-walled members
US4644772A (en) * 1985-08-26 1987-02-24 Anderson-Cook, Inc. Snap ring forming and grooving

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102989938B (zh) * 2012-11-17 2016-09-21 山东省青岛生建机械厂 花键冷敲机

Also Published As

Publication number Publication date
DE4212650C2 (de) 1996-03-21
HK1006686A1 (en) 1999-03-12
JP2555486B2 (ja) 1996-11-20
EP0509734A1 (en) 1992-10-21
DE4212650A1 (de) 1992-10-22
JPH04319037A (ja) 1992-11-10

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