WO2012098959A1 - Joint universel homocinétique coulissant - Google Patents

Joint universel homocinétique coulissant Download PDF

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Publication number
WO2012098959A1
WO2012098959A1 PCT/JP2012/050301 JP2012050301W WO2012098959A1 WO 2012098959 A1 WO2012098959 A1 WO 2012098959A1 JP 2012050301 W JP2012050301 W JP 2012050301W WO 2012098959 A1 WO2012098959 A1 WO 2012098959A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil spring
universal joint
velocity universal
constant velocity
receiving member
Prior art date
Application number
PCT/JP2012/050301
Other languages
English (en)
Japanese (ja)
Inventor
達朗 杉山
真 友上
Original Assignee
Ntn株式会社
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 Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2012098959A1 publication Critical patent/WO2012098959A1/fr

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    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
    • F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
    • F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod 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
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
    • F16D2003/2026—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints with trunnion rings, i.e. with tripod joints having rollers supported by a ring on the trunnion

Definitions

  • the present invention relates to a constant velocity universal joint used for power transmission devices such as automobiles and various industrial machines, and more particularly to a sliding type constant velocity universal joint.
  • a driving force transmission structure in which a pair of sliding constant velocity universal joints are interposed between respective driving shafts between a vehicle differential gear and left and right wheels with an intermediate shaft interposed therebetween.
  • the intermediate shaft since the intermediate shaft is freely displaced in the axial direction and its position is not fixed, one end portion of the intermediate shaft hits the inner end surface of the outer joint member of one constant velocity universal joint. Abnormal noise and vibration may occur.
  • a coil spring is interposed between the inner end of the outer ring joint member of the other constant velocity universal joint and the other end of the intermediate shaft in a compressed state, and the intermediate shaft is A configuration is adopted in which the one constant velocity universal joint is urged and one end of the intermediate shaft is pressed against a receiving member provided on the inner end face of the outer joint member (Patent Documents 1 and 2).
  • This constant velocity universal joint is constituted by a combination of an outer joint member 111, an inner joint member 112, a torque transmission shaft (the intermediate shaft) 113, a coil spring 114 and a spring receiving member 115.
  • the outer joint member 111 is formed with a cup-shaped mouth portion 116 having one end opened, and a stem portion 117 is provided on the opposite surface of the mouth portion 116.
  • An axial guide groove 118 is provided at a circumferentially equally divided position of the inner peripheral surface of the mouse portion 116, and a spring receiving recess 119 is provided at the center of the inner bottom surface.
  • the inner joint member 112 is provided with a journal shaft protruding in a radial direction at a position equally divided into three parts around the boss 123, a so-called trunnion shaft 124.
  • a roller 128 having needle rollers 127 interposed between an inner ring 125 and an outer ring 126 is fitted to the trunnion shaft 124 so as to be swingable with a margin in the radial direction.
  • a roller 128 is slidably fitted into the guide groove 118.
  • the torque transmission shaft 113 has a spline shaft portion 130 formed at the tip thereof, and the tip surface of the spline shaft portion 130 is a convex spherical surface 131.
  • the spline shaft portion 130 is fitted into the spline hole 122 of the inner joint member 112, and is prevented from coming off by a retaining ring 132.
  • the convex spherical surface 131 protrudes from the spline hole 122 to the inside of the mouse portion 116.
  • the spring receiving member 115 is a cup-shaped member including a bottom plate 133 formed on a concave spherical surface that contacts the convex spherical surface 131 and a cylindrical portion 134 that rises from the peripheral edge of the bottom plate 133 toward the spring receiving concave portion 119. is there.
  • the rising height of the cylindrical portion 134 is formed such that the cylindrical portion 134 can contact the outer ring 126 when the torque transmission shaft 113 takes a large operating angle ⁇ .
  • the coil spring 114 is interposed between the spring receiving recess 119 and the spring receiving member 115 in a compressed state.
  • Patent Document 2 shown in FIGS. 5 and 6, the configuration is substantially the same as that of Patent Document 1, but the spring receiving member 115 has a cylindrical portion 134 whose height is higher than that of Patent Document 1. The difference is that it is a low-shaped dish.
  • the roller 128 that swings freely on the trunnion shaft 124 has a complicated structure with a step on its width surface, so the rising height of the cylindrical portion 134 matches the size and model of the constant velocity universal joint. There is a hassle that must be set. Further, since the rising height of the cylindrical portion 134 is increased, there is a problem that the spring receiving member 115 as a part is increased in size.
  • the spring receiving member 115 in the case of Patent Document 2 shown in FIG. 5 and FIG. 6 has a dish shape in which the cylindrical portion 134 is formed to be relatively low, so that it is more compact than the above case, and press There is an advantage that it can be easily manufactured by processing.
  • the coil spring 114 bends and tilts and directly interferes with the roller 128, and a part of the roller 128 may enter the gap between the pitches of the coil spring 114 (see FIG. 6).
  • the present invention aims to make the spring receiving member compact in the sliding type constant velocity universal joint, while preventing the edge of the spring receiving member from falling into the stepped portion of the roller width surface.
  • the objective is to improve the performance.
  • the present invention provides an outer joint member, an inner joint member slidable with respect to the outer joint member, a radial trunnion shaft provided on the inner joint member, and a neck on the trunnion shaft.
  • a roller fitted in a swingable manner, a torque transmission shaft fitted in the center of the inner joint member, a spring receiving member having a concave spherical surface contacting the convex spherical surface at the tip of the torque transmission shaft, and the spring receiving member and
  • a sliding type constant velocity universal joint comprising a coil spring interposed between the inner bottom surface of the outer joint member and transmitting torque between a stem portion provided on the outer joint member and the torque transmission shaft.
  • the spring receiving member is formed in a dish shape having a relatively low cylindrical portion, and the pitch of the coil spring is such that even when the coil spring interferes with the roller, a part of the roller is It was set configured to enter the gap hardly magnitude between pitch.
  • the pitch of the coil spring As described above, even if the joint takes a large operating angle and the coil spring part bends or tilts and interferes with the roller, the coil spring Part of the roller is prevented from entering the gap between the pitches. As a result, since the inclination of the coil spring does not increase any more and the inclination of the spring receiving member does not increase any more, the problem that the spring receiving member falls into the stepped portion of the roller width surface can be prevented. .
  • the specific height of the cylindrical portion of the spring receiving member refers to a height that accepts about two rounds of the end of the coil spring.
  • the pitch of the coil spring is specifically set to be not less than the wire diameter of the coil spring wire and not more than twice the wire diameter.
  • the case where the pitch of the coil spring is equal to the wire diameter of the coil spring wire means that the gap between the pitches is zero (contact state).
  • the case where the pitch is twice as large as the wire diameter means that the gap between the pitches is equal to the diameter of the wire.
  • the pitch does not necessarily need to be set to a constant size over the entire length of the coil spring, but is set to the size in a range from the end of the coil spring on the spring receiving member side to a portion that interferes with the roller.
  • it is general to adopt a configuration in which the other ranges are formed at a relatively large pitch.
  • the coil spring has a relatively small pitch range, that is, a small pitch range, and a relatively large pitch range, that is, a large pitch range.
  • the coil spring interposed between the inner bottom surface of the outer joint member and the torque transmission shaft has a pitch size of the coil spring. Even when it interferes with the roller, a part of the roller is set to a pitch that does not easily enter the gap between the pitches. It is prevented from entering the gap between the pitches. As a result, since the inclination of the coil spring and the spring receiving member that supports the coil spring is also restricted, the problem that the spring receiving member falls into the stepped portion of the roller is prevented, and the operability of the constant velocity universal joint is improved. .
  • the height may be a low dish shape that allows the coil spring to be seated stably. Thereby, the spring receiving member can be made compact.
  • FIG. 3 is a cross-sectional view of the sliding type constant velocity universal joint according to Embodiment 1 when the operating angle is 0 °. It is an expanded sectional view of the spring receiving member of FIG. 1A. It is an expanded sectional view of the coil spring of FIG. 1A. It is sectional drawing at the time of taking the fixed operating angle of FIG. 1A. It is a partially expanded sectional view of FIG. It is sectional drawing of the state which took the operating angle of the sliding type constant velocity universal joint of the prior art example. It is sectional drawing of the state which took the operating angle of the sliding type constant velocity universal joint of another prior art example. It is a partially expanded sectional view of FIG.
  • the tripod type sliding constant velocity universal joint according to the first embodiment shown in FIGS. 1A to 3 is a combination of an outer joint member 11, an inner joint member 12, a torque transmission shaft 13, a coil spring 14 and a spring bearing member 15. Consists of.
  • the outer joint member 11 is composed of a cup-shaped mouth portion 16 having one end opened, and a stem portion 17 projecting coaxially opposite to the mouth portion 16 at the center of the outer surface of the closed end.
  • An axial guide groove 18 is provided at a position of the inner peripheral surface of the mouse portion 16 in three circumferential directions, and a spring receiving recess 19 is provided at the center of the inner bottom surface.
  • the stem portion 17 is provided with a spline (including serration) 21.
  • the inner joint member 12 is provided with a so-called trunnion shaft 24, which is a journal shaft protruding in the radial direction at a position equally divided into three around the boss 23.
  • a spline hole 22 is provided at the center of the boss 23.
  • the trunnion shaft 24 has a cross-sectional shape that is cylindrical or elliptical, and a roller 28 is fitted to the trunnion shaft 24 so as to be swingable with a margin in the radial direction.
  • the roller 28 is configured by interposing a needle roller 27 between the inner ring 25 and the outer ring 26.
  • the trunnion shaft 24 may be formed in a spherical shape.
  • the inner ring 25 and the needle rollers 27 are integrated with the outer ring 26 by retaining rings 29a and 29b interposed between the inner and outer end faces of the outer ring 26.
  • the outer ring 26 of the roller 28 is slidably fitted into the guide groove 18.
  • a stepped portion 38 exists between the width surface of the outer ring 26 on the boss portion 23 side and the retaining ring 29a.
  • the torque transmission shaft 13 has a spline shaft portion 30 formed at the tip portion, and the tip surface of the spline shaft portion 30 is a convex spherical surface 31.
  • the spline shaft portion 30 is fitted into the spline hole 22 of the inner joint member 12 and is prevented from coming off by a retaining ring 32.
  • the convex spherical surface 31 protrudes from the spline hole 22 to the inside of the mouse portion 16.
  • the spring receiving member 15 includes a bottom plate 33 formed on a concave spherical surface that contacts the convex spherical surface 31, and a low cylindrical portion that rises from the peripheral edge of the bottom plate 33 toward the spring receiving concave portion 19. 34 in the shape of a dish. A corner portion between the peripheral portion of the inner bottom surface of the bottom plate 33 and the rising portion of the inner peripheral surface of the cylindrical portion 34 is a seating portion 35 of the coil spring 14.
  • the rising height of the cylindrical portion 34 is set to a height sufficient to allow the end portion of the coil spring 14 to be seated stably at the seating portion 35. Specifically, it is set to a height of about two rounds of the portion of the coil spring 14 in the small pitch range C (see FIG. 1C) described later.
  • the spring receiving member 15 has a plate shape, it can be easily manufactured by pressing a metal plate. In addition, it can be formed of a sintered body.
  • the coil spring 14 is interposed between the spring receiving recess 19 and the spring receiving member 15 in a compressed state.
  • the pitch P of the coil spring 14 (see FIG. 1C) is a relatively large pitch range on the spring receiving recess 19 side, that is, a large pitch range S.
  • the range of several turns from the end on the side is a relatively small pitch range, that is, a small pitch range C.
  • the length of the small pitch range C is set to the length from the end portion on the spring receiving member 15 side to the portion where the coil spring 14 interferes with the roller 28.
  • the small pitch range C is a range of four turns from the end.
  • the size of the pitch P in the small pitch range C is set in the range of d to 2d (d is the diameter of the wire), that is, d ⁇ P ⁇ 2d.
  • the pitch P is d means that the gap between the pitches is zero, that is, the wires are in contact with each other. In any case, the pitch P of the large pitch range S is set larger than each case of the small pitch range C.
  • first and second circumferential portions of the free end portion of the small pitch range C be fitted to the seating portion 35 of the spring receiving member 15 with a required tightening margin in order to stabilize the coil spring 14.
  • FIGS. 2 and 3 show an operating state in which a constant operating angle ⁇ (15 ° in the case of illustration) is taken.
  • the spring receiving member 15 may be tilted in a direction opposite to the tilt direction of the torque transmission shaft 13.
  • the end portion on the spring receiving side of the coil spring 14 also moves, and is bent and inclined in a dogleg shape at the boundary portion between the large pitch range S and the small pitch range C.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

L'invention porte sur un joint universel homocinétique coulissant, dont l'intérieur contient un ressort hélicoïdal destiné à exercer une force de pression sur un arbre de transmission de couple, un élément palier de ressort compact étant utilisé, et cet élément palier de ressort étant empêché de tomber dans une partie de gradin d'une face d'extrémité de rouleau même dans le cas d'un angle de fonctionnement élevé. Le joint universel homocinétique coulissant comprend un élément de joint extérieur (11), un élément de joint intérieur pouvant coulisser (12), un arbre de transmission de couple (13) monté au centre de l'élément de joint intérieur (12), un élément palier de ressort (15) et un ressort hélicoïdal (14) interposé entre l'élément palier de ressort (15) et la face inférieure intérieure de l'élément de joint extérieur (11), le joint pouvant être rendu plus compact par formation de l'élément palier de ressort (15) selon une forme de cuvette, et la dimension du pas du ressort hélicoïdal (14) étant réglée de sorte qu'un rouleau (28) ne pénètre pas facilement dans un espace entre pas, même dans un cas où le ressort hélicoïdal (14) interfère avec le rouleau (28).
PCT/JP2012/050301 2011-01-21 2012-01-11 Joint universel homocinétique coulissant WO2012098959A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-010768 2011-01-21
JP2011010768A JP2012149749A (ja) 2011-01-21 2011-01-21 摺動式等速自在継手

Publications (1)

Publication Number Publication Date
WO2012098959A1 true WO2012098959A1 (fr) 2012-07-26

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PCT/JP2012/050301 WO2012098959A1 (fr) 2011-01-21 2012-01-11 Joint universel homocinétique coulissant

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JP (1) JP2012149749A (fr)
WO (1) WO2012098959A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005172142A (ja) * 2003-12-11 2005-06-30 Ntn Corp ドライブシャフト
JP2007239877A (ja) * 2006-03-08 2007-09-20 Ntn Corp ドライブシャフト

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005172142A (ja) * 2003-12-11 2005-06-30 Ntn Corp ドライブシャフト
JP2007239877A (ja) * 2006-03-08 2007-09-20 Ntn Corp ドライブシャフト

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JP2012149749A (ja) 2012-08-09

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