FR2502528A1 - Method of fabricating universal joint yoke - uses forging with jaws cantilevering from hub and with central hub groove parallel to jaws - Google Patents

Method of fabricating universal joint yoke - uses forging with jaws cantilevering from hub and with central hub groove parallel to jaws Download PDF

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Publication number
FR2502528A1
FR2502528A1 FR8106147A FR8106147A FR2502528A1 FR 2502528 A1 FR2502528 A1 FR 2502528A1 FR 8106147 A FR8106147 A FR 8106147A FR 8106147 A FR8106147 A FR 8106147A FR 2502528 A1 FR2502528 A1 FR 2502528A1
Authority
FR
France
Prior art keywords
jaws
hub
fork
universal joint
cantilevering
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.)
Granted
Application number
FR8106147A
Other languages
French (fr)
Other versions
FR2502528B3 (en
Inventor
Rene Dido
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.)
MONTREUIL CONST MECANIQUES
Original Assignee
MONTREUIL CONST MECANIQUES
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 MONTREUIL CONST MECANIQUES filed Critical MONTREUIL CONST MECANIQUES
Priority to FR8106147A priority Critical patent/FR2502528A1/en
Publication of FR2502528A1 publication Critical patent/FR2502528A1/en
Application granted granted Critical
Publication of FR2502528B3 publication Critical patent/FR2502528B3/fr
Granted legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/762—Coupling members for conveying mechanical motion, e.g. universal joints
    • B21K1/765—Outer elements of coupling members
    • 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
    • F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
    • F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
    • F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
    • F16D3/387—Fork construction; Mounting of fork on shaft; Adapting shaft for mounting of fork
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/11—Joints, e.g. ball joints, universal joints
    • 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
    • F16D2250/00—Manufacturing; Assembly

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)

Abstract

The process contrives the fabrication of a yoke for a universal joint from a rough piece derived from a foundry or a forge. The rough forging has jaws (1) rigidly connected to a hub (2) with a central longitudinal groove (4) parallel to the jaws. The geometry of the forging is such that, by boring a hole in the hub along the axis (c-c) of the fork, the drive-axle journal (6) and the inelt (7) for the axle-clamp are formed in a single operation. Rounded ears (5) may be provided on each side of the inlet, subsequently drilled to locate the clamp-bolt.

Description

L'invention concerne un procédé de fabrication de fourche articulee pour joint de cardan et plus précisément un procéde permettant à partir d'une pièce brute de fonderie ou de forge, -et ce dans tout matériau- d'obtenir les orifices et fentes de la fourche sans reprise ultérieure d'usinage.The invention relates to a method of manufacturing an articulated fork for a universal joint and more precisely a method making it possible, starting from a rough piece of foundry or forging, and this in any material, to obtain the orifices and slots of the fork without subsequent resumption of machining.

On sait que les fourches de joints de cardan sont articulées sur un croisillon central et raccordees, l'une a un arbre d'entrainement et l'autre à un arbre entrain. Les fourches doivent être particulièrement résistantes car elles doivent souvent subir des contraintes importantes, sans toutefois avoir un poids trop élevé. En outre etant fabriquées en série, il convient de diminuer au maximum leur prix de revient en evitant notamment les reprises de la pièce dans différents postes d'usinage.It is known that the forks of universal joints are articulated on a central crosspiece and connected, one to a drive shaft and the other to a drive shaft. The forks must be particularly resistant because they often have to undergo significant stresses, without however being too heavy. In addition being manufactured in series, it is advisable to reduce their cost price as much as possible, in particular by avoiding reworking of the part in different machining stations.

Il existe un procéde de fabrication qui consiste à découper un profilé en metal leger pour lui donner le contour d'une fourche puis à effectuer des opérations ulterieures d'usinage de cette ebauche pour obtenir d'une part les alésages recevant les paliers du croisillon et d'autre part les fentes de serrage et les alésages des vis de serrage qui permettent la fixation des arbres au coeur de la fourche. Ces opérations doivent être effectuées avec minutie et necessitent de soumettre l'ébauche à plusieurs outils, selon des orientations différentes. La réalisation de la fente de serrage et de l'alésage correspondant represente notamment une operation de découpage et meulage longue et coûteuse.There is a manufacturing process which consists in cutting a light metal profile to give it the outline of a fork then in performing subsequent operations for machining this blank to obtain, on the one hand, the bores receiving the bearings of the spider and on the other hand the clamping slots and the bores of the clamping screws which allow the shafts to be fixed to the heart of the fork. These operations must be carried out with meticulousness and require subjecting the blank to several tools, according to different orientations. The realization of the clamping slot and the corresponding bore represents in particular a long and costly cutting and grinding operation.

Pour eviter cet inconvénient en même temps que réduire le temps de fabrication, la demanderesse a pense à conformer d'une certaine manière la pièce brute de fonderie ou de forge, -et ce dans tout materiau- à partir de laquelle sera réalisée la fourche, pour obtenir en une seule operation d'usinage plusieurs decoupes ou alesages.To avoid this drawback at the same time as reducing the manufacturing time, the applicant has thought of conforming in a certain way the raw piece of foundry or forge, and this in any material- from which the fork will be made, to obtain several cuts or bores in a single machining operation.

Le procedé de l'invention consiste à prévoir dans la pièce venant de fonderie ou de forge, -et ce dans tout matériau-, une rigole ou echancrure localise dans le centre de la fourche et s'etendant parallèlement aux branches de ladite fourche, de telle manière que l'opération de fraisage du berceau de l'arbre d'entrainement ou de l'arbre entrainé dégage la fente de serrage longitudinale prévue pour l'arbre. The method of the invention consists in providing in the part coming from foundry or forge, and this in any material, a groove or notch located in the center of the fork and extending parallel to the branches of said fork, such that the milling operation of the cradle of the drive shaft or the driven shaft releases the longitudinal clamping slot provided for the shaft.

Des caractéristiques particulières et avantages de l'invention apparaîtront à la lecture de la description qui va suivre d'une forme de réalisation en référence aux dessins annexés qui repre- sentent : - figure 1 : une vue en perspective de l'ébauche de fourche
venant de fonderie ou de forge.Special features and advantages of the invention will appear on reading the following description of an embodiment with reference to the accompanying drawings which show: - Figure 1: a perspective view of the fork blank
coming from foundry or forge.

- figure 2 : une vue en coupe de la fourche selon le plan A de
la figure .1. - Figure 2: a sectional view of the fork according to plane A of
Figure .1.

- figure 3 : une vue en coupe de la fourche selon la ligne BB'
de la figure 2.- Figure 3: a sectional view of the fork along line BB '
in Figure 2.

On voit à la figure 1 une ébauche de fourche telle qu'elle sort de fonderie avant d'être soumise aux opérations d'usinage.We see in Figure 1 a fork blank as it leaves the foundry before being subjected to machining operations.

Cette fourche comprend essentiellement deux branches ou machoires 1 solidaires d'un moyeu 2 qui constitue le centre de la fourche. Les extrémités 3 des deux machoires 1 sont conformes comme des pastilles qui seront alésées pour recevoir les paliers support du croisillon central non représenté. Le moyeu 2 présente une rigole ou échancrure 4 qui s'étend parallèlement aux machoires 1 ; de part et d'autre de cette échancrure1 deux arrondis 5 débordant le moyeu, et parallèles également aux machoires, sont destinés à être alésés pour le passage de la vis de serrage.This fork essentially comprises two branches or jaws 1 secured to a hub 2 which constitutes the center of the fork. The ends 3 of the two jaws 1 conform as pellets which will be bored to receive the support bearings of the central cross not shown. The hub 2 has a groove or notch 4 which extends parallel to the jaws 1; on either side of this scallop1 two rounded 5 protruding from the hub, and also parallel to the jaws, are intended to be bored for the passage of the clamping screw.

L'ébauche venant de fonderie, ainsi réalisée, ne subira d'opérations d'alésage que dans deux plans perpendiculaires pour obtenir la fourche usinée représentée aux figures 2 et 3.The blank coming from the foundry, thus produced, will only undergo boring operations in two perpendicular planes to obtain the machined fork shown in FIGS. 2 and 3.

Lors d'une première operation d'alésage effectuée sur le moyeu 2 dans le sens de l'axe CC' de la fourche, on réalise l'orifice 6 servant de berceau à l'arbre d'entrainement. Du fait de l'existence de 1 'échancrure longitudinale 4 qui bien évidemment est prevue suffisamment profonde, la couronne entourant le berceau 6 se trouve automatiquement pourvue d'une fente de serrage 7 sans nécessiter ainsi de reprise ultérieure pour découper cette couronne. During a first reaming operation carried out on the hub 2 in the direction of the axis CC ′ of the fork, the hole 6 serving as a cradle for the drive shaft is produced. Due to the existence of one longitudinal notch 4 which of course is provided sufficiently deep, the crown surrounding the cradle 6 is automatically provided with a clamping slot 7 without thus requiring subsequent recovery to cut this crown.

L'ébauche est ensuite soumise à deux autres opérations d'alésage effectuees perpendiculairement au plan 1. Une opération consiste à aléser les pastilles d'extrémité 3 prévues sur les machoires pour y obtenir les logements des paliers support du croisillon central ; une autre opération consiste à aléser les arrondis 5 pour le passage de la vis de serrage. On obtient ainsi la fourche telle que representée aux figures 2 et 3.The blank is then subjected to two other reaming operations carried out perpendicular to the plane 1. One operation consists in reaming the end pads 3 provided on the jaws to obtain there the housings of the support bearings of the central cross; another operation consists in boring the rounded 5 for the passage of the clamping screw. This gives the fork as shown in Figures 2 and 3.

L'invention ne se limite pas à l'exemple précédemment decrit et represente mais en englobe également les variantes. The invention is not limited to the example previously described and represents but also encompasses the variants.

Claims (2)

REVENDICATIONS 10/ Procédé de fabrication de fourches pour joint de cardan10 / Method of manufacturing forks for universal joint a partir d'une ebauche venant de fonderie ou de forge, from a blank coming from foundry or forge, -et ce dans tout materiau- ayant la forme de machoires -and this in any material- having the shape of jaws solidaires d'un moyeu qui constitue le centre de la integral with a hub which constitutes the center of the fourche caracterise parle fait qu'une rigole ou achan-  fork characterized by the fact that a channel or crure longitudinale (4) est prévue dans le centre de longitudinal groove (4) is provided in the center of ladite ébauche et s'etend parallèlement aux machoires (1) said blank and extends parallel to the jaws (1) et que par un alesage effectue sur le moyeu (2) dans le and that by a bore carried out on the hub (2) in the sens de l'axe CC' de la fourche on réalise a la fois l'orifice direction of the axis CC 'of the fork, the hole is made at the same time (6) servant de berceau a l'axe d'entrainement et la fente (6) serving as a cradle for the drive shaft and the slot de serrage (7) dudit axe. clamping (7) of said axis. 2 / Procede de fabrication selon la revendication l-caracterisé  2 / manufacturing method according to claim l-characterized par le fait que de part et d'autre de l'échancrure (4) sont by the fact that on either side of the notch (4) are prevus deux arrondis (5) débordant ie moyeu et parallèles provided two rounded (5) projecting ie hub and parallel aux machoires et destinés a etre alésés pour la passage jaws and intended to be bored for passage de la vis de serrage. of the clamping screw. 30/ Fourche pour joint de cardan caractérisé en ce qu'elle30 / Fork for universal joint characterized in that it est fabriquée selon le procédé des revendications 1 ou 2.  is produced according to the process of claims 1 or 2.
FR8106147A 1981-03-27 1981-03-27 Method of fabricating universal joint yoke - uses forging with jaws cantilevering from hub and with central hub groove parallel to jaws Granted FR2502528A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8106147A FR2502528A1 (en) 1981-03-27 1981-03-27 Method of fabricating universal joint yoke - uses forging with jaws cantilevering from hub and with central hub groove parallel to jaws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8106147A FR2502528A1 (en) 1981-03-27 1981-03-27 Method of fabricating universal joint yoke - uses forging with jaws cantilevering from hub and with central hub groove parallel to jaws

Publications (2)

Publication Number Publication Date
FR2502528A1 true FR2502528A1 (en) 1982-10-01
FR2502528B3 FR2502528B3 (en) 1984-07-27

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FR8106147A Granted FR2502528A1 (en) 1981-03-27 1981-03-27 Method of fabricating universal joint yoke - uses forging with jaws cantilevering from hub and with central hub groove parallel to jaws

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5845394A (en) * 1995-06-29 1998-12-08 Nsk Ltd. Method of manufacturing a yoke for an elastic universal joint
CN104070126A (en) * 2014-04-22 2014-10-01 湖南千跃机械制造有限公司 Forging jaw machining method
EP2952766A1 (en) * 2014-06-06 2015-12-09 Tirsan Kardan Sanayi Ve Ticaret Anonim Sirketi A double cardan shaft with a centering piece integrated with the spider connection bearing and method of making the same
CN105312836A (en) * 2014-06-06 2016-02-10 哈尔滨飞机工业集团有限责任公司 Machining method for inner side chamfers of helicopter lifting force system fixing disc
CN109501853A (en) * 2018-12-25 2019-03-22 豫北凯斯特隆（新乡）汽车科技有限公司 A kind of motor turning jackshaft integral type meropodium fork structure and its manufacturing process
CN111791031A (en) * 2020-07-20 2020-10-20 陈小苗 Pipe fitting and flange manufacturing process and assembling method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5845394A (en) * 1995-06-29 1998-12-08 Nsk Ltd. Method of manufacturing a yoke for an elastic universal joint
CN104070126A (en) * 2014-04-22 2014-10-01 湖南千跃机械制造有限公司 Forging jaw machining method
EP2952766A1 (en) * 2014-06-06 2015-12-09 Tirsan Kardan Sanayi Ve Ticaret Anonim Sirketi A double cardan shaft with a centering piece integrated with the spider connection bearing and method of making the same
CN105312836A (en) * 2014-06-06 2016-02-10 哈尔滨飞机工业集团有限责任公司 Machining method for inner side chamfers of helicopter lifting force system fixing disc
CN109501853A (en) * 2018-12-25 2019-03-22 豫北凯斯特隆（新乡）汽车科技有限公司 A kind of motor turning jackshaft integral type meropodium fork structure and its manufacturing process
CN111791031A (en) * 2020-07-20 2020-10-20 陈小苗 Pipe fitting and flange manufacturing process and assembling method
CN111791031B (en) * 2020-07-20 2023-07-07 江苏狼博管道制造有限公司 Pipe fitting and flange manufacturing and assembling method

Also Published As

Publication number Publication date
FR2502528B3 (en) 1984-07-27

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