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1. WO2010024083 - TRIPOD UNIFORM-MOTION UNIVERSAL JOINT AND METHOD FOR MANUFACTURING THE SAME

Publication Number WO/2010/024083
Publication Date 04.03.2010
International Application No. PCT/JP2009/063514
International Filing Date 29.07.2009
IPC
F16D 3/20 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
3Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
16Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
20one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
B21J 5/02 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
5Methods for forging, hammering, or pressing; Special equipment or accessories therefor
02Die forging; Trimming by making use of special dies
F16D 3/205 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
3Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
16Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
20one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
202one coupling part having radially projecting pins, e.g. tripod joints
205the pins extending radially outwardly from the coupling part
CPC
B21J 5/025
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
5Methods for forging, hammering, or pressing
02Die forging; Trimming by making use of special dies ; ; Punching during forging
025Closed die forging
B21K 1/762
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
1Making machine elements
76elements not mentioned in one of the preceding groups
762Coupling members for conveying mechanical motion, e.g. universal joints
F16D 2003/2026
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
3Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
16Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
20one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
202one coupling part having radially projecting pins, e.g. tripod joints
2026with trunnion rings, i.e. with tripod joints having rollers supported by a ring on the trunnion
F16D 2250/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
2250Manufacturing; Assembly
F16D 2250/0023
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
2250Manufacturing; Assembly
0023Shaping by pressure
F16D 3/2055
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
3Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
16Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
20one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
202one coupling part having radially projecting pins, e.g. tripod joints
205the pins extending radially outwardly from the coupling part
2055having three pins, i.e. true tripod joints
Applicants
  • NTN株式会社 NTN CORPORATION [JP]/[JP] (AllExceptUS)
  • 五十公野 純一 IZUMINO Junichi [JP]/[JP] (UsOnly)
  • 小中 健司 KONAKA Kenji [JP]/[JP] (UsOnly)
Inventors
  • 五十公野 純一 IZUMINO Junichi
  • 小中 健司 KONAKA Kenji
Agents
  • 田中 秀佳 TANAKA Hideyoshi
Priority Data
2008-22004528.08.2008JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) TRIPOD UNIFORM-MOTION UNIVERSAL JOINT AND METHOD FOR MANUFACTURING THE SAME
(FR) JOINT DE CARDAN À MOUVEMENT UNIFORME TRIPODE ET PROCÉDÉ DE FABRICATION DE CELUI-CI
(JA) トリポード型等速自在継手およびその製造方法
Abstract
(EN) Provided is a tripod uniform-motion universal joint wherein the number of manufacturing steps can be decreased by reducing the weight of a leg shaft forming stock, and forging of the leg shaft is facilitated.  Also provided is a method for manufacturing the same. A leg shaft is forged while the corner (32) at the distal end of a leg shaft forming stock, (54) is constrained by means of a die (X).  In a state that a relief (35) is provided on the distal end side of the die (X), a part of the corner (32) at the distal end of the leg shaft forming stock, (54) including the long diameter side of an ellipse is constrained by means of the die (X).  In the die (X), the inner wall of a part for constraining the corner (32) at the distal end of the leg shaft forming stock, (54) has a tapered surface (33).  An edge (21) having the cross-sectional area thereof reducing toward the distal end side is formed, by the above at a part including the long diameter side of an ellipse near the distal end of the outer circumferential surface (30) of the leg shaft (4), and a tapered surface (20) extending from the edge (21) toward the distal end side is formed.  Centering of the leg shaft (4) is performed by making the edge (21) abut, at two places thereof on the long diameter side of an ellipse, on a centering tool.
(FR) L’invention concerne un joint de cardan à mouvement uniforme tripode, dans lequel le nombre d’étapes de fabrication peut être réduit en diminuant le poids d’un arbre de pied formant une barre, et le forgeage de l’arbre de pied est facilité. L’invention divulgue également un procédé de fabrication dudit joint. Un arbre de pied est forgé pendant que le coin (32) à l’extrémité distale d’un arbre de pied formant une barre (54) est contraint au moyen d’une matrice (X). Dans un état dans lequel un relief (35) est formé sur le côté d’extrémité distale de la matrice (X), une partie du coin (32) à l’extrémité distale de l’arbre de pied formant une barre (54) comprenant le côté de long diamètre d’une ellipse est contrainte au moyen de la matrice (X). Dans la matrice (X), la paroi intérieure d’une partie pour contraindre le coin (32) à l’extrémité distale de l’arbre de pied formant une barre (54) présente une surface conique (33). Un bord (21) dont l’aire de la section transversale se réduit en direction du côté d’extrémité distale est formé par la matrice ci-dessus à une partie comprenant le côté de long diamètre d’une ellipse à proximité de l’extrémité distale de la surface circonférentielle extérieure (30) de l’arbre de pied (4), et une surface conique (20) s’étendant à partir du bord (21) en direction du côté d’extrémité distale est formée. Le centrage de l’arbre de pied (4) est exécuté en faisant buter le bord (21), en deux endroits de celui-ci sur le côté de diamètre long d’une ellipse, sur un outil de centrage.
(JA)  脚軸素形材の重量を軽減して製造工程数を減らすことが可能であり、また、脚軸の鍛造も容易となるトリポード型等速自在継手およびその製造方法を提供する。  脚軸素形材54の先端角部32を金型Xで拘束して鍛造する。この際、脚軸素形材54は、金型Xの先端側に逃げ部35を設けた状態で、先端角部32で楕円長径側を含む部位を金型Xで拘束する。この金型Xにおいて、脚軸素形材54の先端角部32を拘束する部位の内壁は、テーパ面33とする。上記鍛造により、脚軸4の外周面30の先端部寄りにおいて、楕円長径側を含む部位に、先端側に向けて横断面積を小さくするエッジ部21が形成され、そのエッジ部21から先端側にテーパ面20が形成される。脚軸4の芯出しは、エッジ部21の楕円長径側の2箇所を芯出し治具に当接させることにより行う。
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