WO2019176871A1 - Joint pour transmission de couple et dispositif de direction assistée électrique - Google Patents

Joint pour transmission de couple et dispositif de direction assistée électrique Download PDF

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Publication number
WO2019176871A1
WO2019176871A1 PCT/JP2019/009759 JP2019009759W WO2019176871A1 WO 2019176871 A1 WO2019176871 A1 WO 2019176871A1 JP 2019009759 W JP2019009759 W JP 2019009759W WO 2019176871 A1 WO2019176871 A1 WO 2019176871A1
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WO
WIPO (PCT)
Prior art keywords
transmission
circumferential
teeth
axial direction
transmission teeth
Prior art date
Application number
PCT/JP2019/009759
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English (en)
Japanese (ja)
Inventor
哲英 藤田
信幸 西村
Original Assignee
日本精工株式会社
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 日本精工株式会社 filed Critical 日本精工株式会社
Priority to DE112019001285.1T priority Critical patent/DE112019001285T5/de
Priority to JP2020506518A priority patent/JP6947287B2/ja
Publication of WO2019176871A1 publication Critical patent/WO2019176871A1/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
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/54—Couplings comprising a chain or strip surrounding two wheels arranged side by side and provided with teeth or the equivalent
    • 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
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/72—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts
    • F16D3/74—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members with axially-spaced attachments to the coupling parts the intermediate member or members being made of rubber or other rubber-like flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0409—Electric motor acting on the steering column
    • 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
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/64—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic elements arranged between substantially-radial walls of both coupling parts
    • F16D3/68—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic elements arranged between substantially-radial walls of both coupling parts the elements being made of rubber or similar material

Definitions

  • the present invention relates to a torque transmission joint that is incorporated in various mechanical devices and transmits torque between a drive shaft and a driven shaft, and an electric power steering device in which the torque transmission joint is incorporated.
  • This electric power steering apparatus includes a steering shaft 2 having a steering wheel 1 attached to the rear end, a housing 3 that rotatably supports the front end of the steering shaft 2, and a portion that is rotationally driven by the steering shaft 2.
  • a fixed worm wheel 4 and a worm 7 having a worm tooth 5 meshing with the worm wheel 4 at an axially intermediate portion and driven to rotate by an electric motor 6 are provided.
  • Both end portions of the worm 7 in the axial direction are rotatably supported in the housing 3 by a pair of rolling bearings 8 and 9 such as deep groove type ball bearings.
  • a pressing piece 10 is externally fitted at a portion protruding from the rolling bearing 8 at the tip of the worm 7, and an urging mechanism such as a coil spring 11 is disposed between the pressing piece 10 and the housing 3. .
  • the coil spring 11 urges the worm teeth 5 of the worm 7 toward the worm wheel 4 via the pressing piece 10.
  • a spline provided at the base end portion of the worm 7 in order to couple the tip end portion of the output shaft 12 of the electric motor 6 and the base end portion of the worm 7 so that torque can be transmitted.
  • the hole 13 and the spline shaft portion 14 provided at the tip of the output shaft 12 are spline-engaged. If the spline shaft portion 14 and the spline hole 13 are in spline engagement in a state where the circumferential clearance is zero, that is, in a state where no backlash exists, the distal end portion of the output shaft 12 and the proximal end portion of the worm 7 No abnormal noise is generated at the spline engaging portion.
  • the output shaft of the electric motor and the worm can be coupled with each other via a metal-made cylindrical power transmission member, whereby the worm can be smoothly displaced.
  • the structure is described.
  • the spline shaft portions provided at both end portions of the power transmission member and the spline holes provided at the respective end portions of the output shaft of the worm and the electric motor.
  • Each spline engaging portion has a backlash. For this reason, abnormal noise may occur based on the presence of such backlash.
  • An object of the present invention is to provide a torque transmission joint having a structure capable of suppressing the occurrence of abnormal noise when reversing the rotation direction of a drive shaft, and an electric power steering device incorporating the torque transmission joint. It is to provide.
  • the torque transmission joint of the present invention includes an intermediate transmission member, a pair of end transmission members, and a pair of elastic members.
  • the intermediate transmission member has a plurality of intermediate transmission teeth arranged at a plurality of locations in the circumferential direction.
  • the pair of end transmission members are arranged on both sides in the axial direction of the intermediate transmission member, and each of the pair of end transmission members has a plurality of end transmission teeth arranged at a plurality of locations in the circumferential direction. .
  • the elastic member is assembled to both sides in the axial direction of the intermediate transmission member, arranged at a plurality of locations in the circumferential direction, and has insertion holes through which the end transmission teeth are inserted in the axial direction.
  • the end transmission teeth and the intermediate transmission teeth inserted in the axial direction through the insertion holes are alternately arranged with respect to the circumferential direction and through the first circumferential gap.
  • the circumferential interval between the circumferential side edges of the insertion hole is smaller than the circumferential interval between adjacent intermediate transmission teeth among the plurality of intermediate transmission teeth.
  • At least one end transmission tooth of the plurality of end transmission teeth includes a tapered transmission whose inner circumferential end has a taper portion whose circumferential width becomes smaller toward the inner side in the axial direction. It is composed of teeth.
  • the circumferential width dimension of the inner end edge in the axial direction of the tapered portion is smaller than the circumferential interval between both side edges of the insertion hole in the circumferential direction.
  • all the end transmission teeth of the plurality of end transmission teeth are constituted by the guide transmission teeth, and the axially inner edges of all the end transmission teeth Can be employed (first configuration) in which the two are present at the same axial position.
  • the torque transmission joint of the present invention only a part of the plurality of end transmission teeth is constituted by the guide transmission teeth, and the tapered portion of the guide transmission teeth
  • the provided axial inner end portion has a configuration (second configuration) projecting inward in the axial direction from the axial inner end edge of the remaining end transmission teeth of the plurality of end transmission teeth. Can be adopted.
  • the tapered portion of the guide transmission tooth of one end transmission member of the pair of end transmission members and the other end portion of the pair of end transmission members can be arranged so as to overlap in the circumferential direction with a second circumferential gap larger than the first circumferential gap interposed.
  • each of the pair of end portion transmission members further includes an end connection portion having a peripheral surface to which one end portions in the radial direction of the plurality of end portion transmission teeth are coupled, and for the guidance.
  • the tapered portion of the transmission tooth and the reinforcing portion which is a circumferential portion to which the tapered portion is coupled among the axially inner end portions of the end connecting portion are the axially inner end portions of the end connecting portion.
  • the structure which protrudes in the axial direction inner side from the other circumferential direction part of these can be employ
  • the reinforcing portion of the guide transmission tooth of one end transmission member of the pair of end transmission members and the other end transmission member of the pair of end transmission members can be arranged so as to overlap in the circumferential direction with a second circumferential gap larger than the first circumferential gap interposed.
  • the both side surfaces in the circumferential direction of the reinforcing portion can be protruded on both sides in the circumferential direction from both side surfaces in the circumferential direction of the tapered portion coupled to the reinforcing portion.
  • the elastic member may include an elastic protrusion that protrudes toward the center in the circumferential direction at a part in the radial direction of at least one side edge of each circumferential side edge of the insertion hole.
  • the elastic protrusion is provided in a radially outward portion of each circumferential side edge of the insertion hole.
  • the electric power steering apparatus of the present invention includes a housing, a worm wheel, a worm, and an electric motor.
  • the worm wheel is rotatably supported with respect to the housing.
  • the worm is rotatably supported with respect to the housing in a state of being engaged with the worm wheel.
  • the electric motor has an output shaft for rotationally driving the worm.
  • the electric power steering apparatus includes a torque transmission joint that connects the output shaft of the electric motor and the worm so that torque transmission is possible between the output shaft of the electric motor and the worm.
  • the torque transmission joint is constituted by the torque transmission joint of the present invention.
  • One end transmission member of the pair of end transmission members is fixed or integrally formed at the tip of the output shaft of the electric motor.
  • the other end transmission member of the pair of end transmission members is fixed to or integrally formed with the base end of the worm.
  • the worm is swingable with respect to the output shaft of the electric motor, and the worm is placed on the worm wheel between the tip of the worm and the housing.
  • An urging mechanism that urges toward the camera can be provided.
  • FIG. 1 is a partially cutaway side view showing an electric power steering apparatus of a first example of an embodiment.
  • FIG. 2 is an enlarged view of part A of FIG.
  • FIG. 3 is a perspective view of the torque transmission joint of the first example of the embodiment.
  • FIG. 4 is a view of the torque transmission joint of the first example of the embodiment as viewed from the outside in the radial direction.
  • FIG. 5 is a view as seen from the side in the axial direction of FIG. 6 is a cross-sectional view taken along the line BB of FIG.
  • FIG. 10 is a cross-sectional view corresponding to the BB cross-sectional view of FIG. 5 showing a combined body of the intermediate transmission member and the elastic member.
  • 11 (a) to 11 (c) are views showing an intermediate transmission member constituting the torque transmission joint of the first example of the embodiment, and FIG. 11 (a) is a side view of one of them.
  • 11 (b) is a cross-sectional view taken along the line FF of FIG. 11 (a), and FIG. 11 (c) is a side view of the other.
  • 12 (a) to 12 (c) are diagrams showing an elastic member constituting the torque transmission joint of the first example of the embodiment, and FIG. 12 (a) is a side view of one of them.
  • FIG. 12B is a cross-sectional view taken along the line GG of FIG. 12A, and FIG. 12C is a side view of the other.
  • FIG. 13 is a perspective view of an end transmission member constituting the torque transmission joint of the first example of the embodiment.
  • 14 (a) and 14 (b) are diagrams showing an end transmission member constituting the torque transmission joint of the first example of the embodiment, and FIG. 14 (a) is an end view.
  • FIG. 14B is a cross-sectional view taken along line HH in FIG.
  • FIG. 15 is an enlarged II cross-sectional view of FIG. FIG.
  • FIG. 16 is a perspective view which shows the state before inserting the edge part transmission tooth of an edge part transmission member in the penetration hole of the coupling body of an intermediate transmission member and an elastic member regarding the 1st example of embodiment.
  • FIG. 17 is an axially inner end portion (tapered portion) of an end transmission tooth of an end transmission member inserted into an insertion hole of a combined body of an intermediate transmission member and an elastic member in the first example of the embodiment. It is a perspective view which shows a state.
  • FIG. 18 is an exploded perspective view showing a part of the torque transmission joint of the second example of the embodiment.
  • FIG. 19 is a diagram corresponding to FIG. 6 regarding the second example of the embodiment.
  • FIG. 20 is a perspective view of an end transmission member constituting the torque transmission joint of the second example of the embodiment.
  • FIG. 21 is a perspective view of a first modification of the end portion transmission member constituting the torque transmission joint of the second example of the embodiment.
  • FIG. 22 is a perspective view of a second modification of the end transmission member constituting the torque transmission joint of the second example of the embodiment.
  • FIG. 23 is a partially cutaway side view showing an example of a conventional structure of an electric power steering apparatus.
  • FIG. 24 is an enlarged JJ sectional view of FIG.
  • FIGS. 1 and 2 A first example of the embodiment will be described with reference to FIGS.
  • the electric power steering apparatus of this example is supported rotatably with respect to the housing 3 in a state in which the housing 3, the worm wheel 4 rotatably supported with respect to the housing 3, and the worm wheel 4 are engaged.
  • a worm 7a and an electric motor 6 having an output shaft 12a for rotationally driving the worm 7a are provided.
  • the housing 3 rotatably supports the front end portion (see FIGS. 23 and 24) of the steering shaft 2 to which the steering wheel 1 is attached at the rear end portion.
  • the worm wheel 4 is fixed to a portion that is rotationally driven by the steering shaft 2.
  • the worm 7a has a worm tooth 5 that meshes with the worm wheel 4 at an axially intermediate portion, and both axial ends of the worm 7a have a pair of rolling bearings 8, 9 such as deep groove ball bearings. Thus, it is rotatably supported in the housing 3.
  • An urging mechanism 15 including an elastic body such as a coil spring or a leaf spring is provided between the rolling bearing 8 fitted on the tip of the worm 7a and the housing 3. Based on the elasticity of the elastic body of the urging mechanism 15, the worm teeth 5 of the worm 7 a are pressed or urged toward the worm wheel 4. With such a configuration, generation of rattling noise due to backlash between the worm tooth 5 and the worm wheel 4 is suppressed.
  • the electric power steering apparatus of the present invention includes a torque transmission joint 16 that connects the output shaft 12a of the electric motor 6 serving as a drive shaft and the worm 7a serving as a driven shaft so as to enable torque transmission.
  • a torque transmission joint 16 that connects the output shaft 12a of the electric motor 6 serving as a drive shaft and the worm 7a serving as a driven shaft so as to enable torque transmission.
  • the distal end portion of the output shaft 12a of the electric motor 6 and the proximal end portion of the worm 7a which are arranged in series with each other in the axial direction, are coupled via a torque transmission joint 16.
  • the torque transmission joint 16 includes an intermediate transmission member 17, a pair of end transmission members 18, and an elastic member 19.
  • the intermediate transmission member 17 has a plurality of intermediate transmission teeth 21 arranged at a plurality of locations in the circumferential direction.
  • the pair of end portion transmission members 18 has a plurality of end portion transmission teeth 37 arranged at a plurality of locations in the circumferential direction.
  • One end transmission member 18 (on the right side in FIGS. 2, 4, 6, and 7) constituting the pair of end transmission members 18 is attached to the output shaft 12a.
  • the other end transmission member 18 (left side in FIGS. 2, 4, 6, and 7) is attached to the base end of the worm 7a.
  • the pair of end transmission members 18 includes a plurality of end transmission teeth 37 and a plurality of intermediate transmission teeth 21 in the circumferential direction on the both sides in the axial direction of the intermediate transmission member 17 from the outside in the axial direction of the torque transmission joint 16. With respect to each other and through circumferential gaps.
  • the intermediate transmission member 17 has a function of transmitting torque between one end transmission member 18 and the other end transmission member 18.
  • the elastic member 19 is made of an elastic material including rubber and other elastomers, and is disposed at a plurality of locations in the circumferential direction, and has a plurality of insertion holes 30 through which the plurality of end transmission teeth 37 are inserted in the axial direction.
  • the elastic material 19 exhibits a buffer function between one end transmission member 18 and the intermediate transmission member and between the other end transmission member 18 and the intermediate transmission member 17.
  • the axial direction inside and outside of each member constituting the torque transmission joint 16 is based on the axial central portion of the torque transmission joint 16 in the assembled state. That is, the axially central side of the torque transmission joint 16 corresponds to the inner side in the axial direction, and both axial sides of the torque transmission joint 16 correspond to the outer side in the axial direction.
  • the pair of end portion transmission members 18 are arranged in the axial direction of the pair of end portion transmission members 18 from both outer sides in the axial direction of the torque transmission joint 16 with the inner ends in the axial direction facing each other.
  • the end portions are assembled to the intermediate transmission member 17 in a direction in which the end portions approach each other, and are arranged on both outer sides in the axial direction of the intermediate transmission member 17.
  • the intermediate transmission member 17 is formed in an annular shape as a whole by a material that is less likely to be elastically deformed (has high rigidity) than the elastic material that constitutes the elastic member 19.
  • the material constituting the intermediate transmission member 17 includes a belt material in which rubber is reinforced with a cloth, a synthetic resin such as PPS, PEEK, polyamide mixed with reinforcing fibers as necessary, an iron alloy such as carbon steel, an aluminum alloy, or the like. A metal is mentioned.
  • the intermediate transmission member 17 is formed by subjecting these materials to processing such as injection molding, casting, forging, sintering, and cutting.
  • the intermediate transmission member 17 has a cylindrical intermediate tube portion 20 and a plurality of intermediate transmission teeth 21.
  • the intermediate cylinder part 20 has circumferential recesses 22 that open on both axial sides in the radial intermediate part on both axial sides.
  • the circumferential recess 22 extends in the circumferential direction of the intermediate transmission member 17 and over the entire circumference of the intermediate transmission member 17.
  • the inner diameter side peripheral surface 23 and the outer diameter side peripheral surface 24 constituting the inner surface of the circumferential recess 22 are cylindrical surfaces centered on the central axis of the intermediate transmission member 17.
  • the intermediate cylinder part 20 has a cylindrical cover part 25 that protrudes on both sides in the axial direction at the radially outer end part on both sides in the axial direction.
  • the inner peripheral surface of the cover part 25 constitutes a single cylindrical surface together with the outer peripheral side peripheral surface 24 of the circumferential recess 22.
  • the intermediate transmission teeth 21 are arranged radially at a plurality of circumferentially equidistant intervals on the radially inner side of the intermediate cylindrical portion 20, and each radial outer end portion of the intermediate transmission teeth 21 is an intermediate cylindrical portion. 20 is coupled to the inner peripheral surface.
  • the circumferential side surfaces of the pair of intermediate transmission teeth 21 adjacent to each other in the circumferential direction are parallel to each other.
  • End transmission teeth 37 of the end transmission member 18 are inserted from both sides in the axial direction between the pair of intermediate transmission teeth 21 adjacent in the circumferential direction, and the intermediate transmission teeth 21 and the end transmission teeth 37 are formed. Are alternately arranged in the circumferential direction.
  • the engagement convex part 26 which protrudes in an axial direction is provided in the circumferential direction center part of each axial direction outer surface of the intermediate transmission teeth 21.
  • the engagement convex portion 26 has a substantially rectangular shape as viewed from the axial direction and extends in the radial direction of the intermediate transmission member 17.
  • the radially outer portion of the axially outer surface that is the tip surface of the engaging convex portion 26 is configured by an inclined side surface portion 27.
  • the inclined side surface portion 27 is inclined in the direction toward the inner side in the axial direction as it goes outward in the radial direction.
  • Claw portions 28 projecting inward in the radial direction are provided on the axially outer half of the radially inner side surface of the engaging protrusions 2 that are alternately arranged in the circumferential direction of the engaging protrusions 26. ing. In the illustrated example, the circumferential positions of the engaging projections 26 having the claw portions 28 are different from each other on both axial sides of the intermediate transmission member 17.
  • the elastic member 19 in this example is constituted by a pair of elastic members 19.
  • Each of the pair of elastic members 19 is formed in an annular shape as a whole by an elastic material.
  • Specific examples of the elastic material constituting the elastic member 19 include rubbers such as NBR and HNBR, and elastomers such as polyurethane and silicon.
  • each of the pair of elastic members 19 has the same shape and the same size.
  • the pair of elastic members 19 are assembled symmetrically on both sides in the axial direction of the intermediate transmission member 17.
  • each of the pair of elastic members 19 has engaging recesses 29, which are through holes, at a plurality of locations in the circumferential direction that are in phase with the intermediate transmission teeth 21.
  • the elastic member 19 has slit-shaped insertion holes 30 at a plurality of locations in the circumferential direction that have the same phase as a portion (interdental portion) between a pair of adjacent intermediate transmission teeth 21.
  • the engagement recesses 29 and the insertion holes 30 are alternately arranged in the circumferential direction.
  • the engaging recess 29 has a substantially rectangular shape whose shape viewed from the axial direction extends in the radial direction of the elastic member 19.
  • the engagement recess 29 engages with an engagement protrusion 26 provided on the outer surface of the intermediate transmission tooth 21 in the axial direction, and prevents the elastic member 19 from rotating relative to the intermediate transmission member 17.
  • an axially outer portion of the radially inner portion of the engaging recess 29 is provided with a thinning portion having a shape that extends the engaging recess 29 radially inward.
  • An engagement beam 31 extending in the circumferential direction is provided on the inner side in the axial direction of the radially inner portion of the engagement recess 29.
  • the insertion hole 30 extends in the radial direction of the elastic member 19 and opens at the inner periphery of the elastic member 19.
  • the end transmission teeth 37 of the end transmission member 18 are inserted into the insertion hole 30 from the outside in the axial direction.
  • the circumferential interval t 30 between the circumferential edges of the insertion hole 30 is smaller than the circumferential interval T 21 between the adjacent intermediate transmission teeth 21 (t 30 ⁇ T 21).
  • the elastic member 19 can include elastic protrusions 32 that protrude toward the center in the circumferential direction on a part in the radial direction of at least one side edge of each circumferential side edge of the insertion hole 30.
  • elastic protrusions 32 projecting toward the center in the circumferential direction are provided on the radially outer side portions of both side edges of the insertion hole 30 in the circumferential direction.
  • the circumferential interval between the tip surfaces of the elastic protrusions 32 facing in the circumferential direction corresponds to the circumferential interval t 30 between the circumferential edges of the insertion hole 30.
  • the circumferential interval between the portions radially deviated from the elastic protrusion 32 is also smaller than the circumferential interval T 21 between the adjacent intermediate transmission teeth 21.
  • the shape of the elastic protrusion 32 viewed from the axial direction is a convex arc shape.
  • the portions that are radially removed from the elastic protrusions 32 are flat portions that are parallel to each other.
  • the shape and position of the elastic protrusion 32 are not limited to the illustrated structure.
  • other shapes such as a triangle and a trapezoid can be adopted as the shape of the elastic protrusion 32 viewed from the axial direction.
  • the elastic protrusions are preferably arranged at the radially outward portions of both side edges in the circumferential direction of the insertion hole, but can also be arranged, for example, at the radial center portions of both circumferential edges of the insertion hole.
  • the number of elastic protrusions is not limited to one, and may be plural.
  • the elastic protrusion 32 may be omitted, and one or both of the circumferential direction both side edges of the insertion hole may be configured by a flat portion.
  • the elastic member 19 has a circumferential convex portion 33 projecting inward in the axial direction at a radially outer end located radially outside the engaging concave portion 29 and the insertion hole 30.
  • the circumferential convex portion 33 extends in the circumferential direction of the elastic member 19 and over the entire circumference of the elastic member 19.
  • the radial intermediate portion of the outer surface in the axial direction of the elastic member 19 is constituted by an inclined side surface portion 34.
  • the inclined side surface portion 34 is inclined in the direction toward the inner side in the axial direction toward the outer side in the radial direction.
  • the pair of elastic members 19 are assembled symmetrically on both sides in the axial direction of the intermediate transmission member 17 to form a combined body 35 of the intermediate transmission member 17 and the pair of elastic members 19. In the state in which the coupling body 35 is configured, the pair of elastic members 19 covers the axially outer surfaces on both sides of the intermediate transmission member 17.
  • the circumferential convex portion 33 of the elastic member 19 is press-fitted inside the circumferential concave portion 22 of the intermediate transmission member 17, and the inner circumferential surface 23 and the circumferential convex portion of the circumferential concave portion 22 are pressed.
  • the inner circumferential surface of the portion 33, the outer circumferential surface 24 of the circumferential recess 22 and the outer circumferential surface of the circumferential projection 33 are all in elastic contact and strongly frictionally engaged.
  • the elastic member 19 is fitted into the cover portion 25 of the intermediate transmission member 17 by an interference fit, and the inner peripheral surface of the cover portion 25 and the outer peripheral surface of the elastic member 19 are in elastic contact and strongly frictionally engaged. .
  • a structure in which a gap is provided at least in one circumferential direction between the inner circumferential surface 23 and the inner circumferential surface of the circumferential convex portion 33, the outer circumferential side surface 24, A structure in which a gap is provided at least at one place in the circumferential direction between the outer circumferential surface of the circumferential convex portion 33, and only in one circumferential surface of the inner diameter side circumferential surface 23 and the outer diameter side circumferential surface 24 in the circumferential direction.
  • a structure in which a discontinuous portion is provided at a location can also be adopted.
  • the engagement convex portion 26 of the intermediate transmission member 17 When the engagement convex portion 26 of the intermediate transmission member 17 is inserted and engaged inside the engagement concave portion 29 of the elastic member 19, relative rotation between the intermediate transmission member 17 and the elastic member 19 is prevented. Further, the claw portion 28 provided on the radially inner side of the engagement convex portion 26 engages with the outer surface in the axial direction of the engagement beam 31. Thereby, the elastic member 19 is prevented from being displaced outward in the axial direction with respect to the intermediate transmission member 17, and the separation of the intermediate transmission member 17 and the elastic member 19 is prevented. In a state where the elastic member 19 is attached to the intermediate transmission member 17, the slit-shaped insertion hole 30 is disposed at a position that is in phase with the portion between the adjacent intermediate transmission teeth 21.
  • the outer surface in the axial direction of the elastic member 19 is positioned on the outer side in the axial direction from the front end surface of the engaging convex portion 26 positioned on the outermost side in the axial direction among the outer surfaces in the axial direction on both sides of the intermediate transmission member 17. That is, the elastic member 19 protrudes outward in the axial direction from the axially outer surfaces on both sides of the intermediate transmission member 17. Further, the inner peripheral surface of the elastic member 19 is located on the radially inner side from the radially inner side surface of the intermediate transmission tooth 21 of the intermediate transmission member 17 and the radially inner end edge of the claw portion 28. That is, the elastic member 19 projects radially inward from the intermediate transmission member 17.
  • Each of the pair of end portion transmission members 18 is formed in an annular shape as a whole.
  • the material constituting the end transmission member 18 include synthetic resins such as PPS, PEEK, and polyamide mixed with reinforcing fibers as necessary, and metals such as iron alloys, copper alloys, and aluminum alloys.
  • the end transmission member 18 is formed by subjecting these materials to processing such as injection molding, casting, forging, sintering, and cutting.
  • the pair of end transmission members 18 have the same shape and the same size.
  • the pair of end transmission members 18 are engaged with both sides in the axial direction of the combined body 35 of the intermediate transmission member 17 and the pair of elastic members 19.
  • each of the pair of end transmission members 18 includes a cylindrical end tube portion 36 that is an end connection portion, and a plurality of ends. It has a part transmission tooth 37 and a ring-shaped collar part 38. A radially inner end portion of the flange portion 38 is coupled to an axially outer end portion of the end tube portion 36.
  • Each of the plurality of end portion transmission teeth 37 has a substantially rectangular plate shape, and is arranged radially at a plurality of locations that are equidistant in the circumferential direction on the radially outer side of the end tube portion 36.
  • each of the pair of end transmission members 18 and the axially inner ends of the constituent parts thereof are the shafts of the torque transmission joints 18 of the respective end transmission members 18.
  • the end part located in the direction center side means the axial direction outer end part means the end part located in the axial direction both sides of the joint 18 for torque transmission.
  • the inner end surface in the axial direction of the end tube portion 36 and the inner end surfaces in the axial direction of all the end transmission teeth 37 are arranged in the same virtual plane orthogonal to the central axis of the end tube portion 36. ing. That is, the axial inner end surface of the end cylindrical portion 36 and the axial inner end surfaces of all the end transmission teeth 37 are present at the same axial position.
  • all the end transmission teeth 37 correspond to guide transmission teeth.
  • Each axially outer end portion and intermediate portion of the end portion transmission tooth 37 is constituted by a straight portion 39, and each axially inner end portion of the end portion transmission tooth 37 is constituted by a taper portion 40. .
  • the slate part 39 and the taper part 40 are formed continuously in the axial direction, and there is no step in the axial direction between the surface of the straight part 39 and the surface of the taper part 40.
  • the straight part 39 has a flat plate shape in which the circumferential width dimension and the radial height dimension do not change in the axial direction.
  • both side surfaces in the circumferential direction of the straight portion 39 are planes parallel to each other.
  • the tapered portion 40 functions as a guide portion when the end portion transmission teeth 37 are inserted into the insertion hole 30 of the elastic member 19 from the outside in the axial direction, and is formed in a wedge shape that tapers inward in the axial direction.
  • the taper portion 40 is configured such that the circumferential width dimension and the radial height dimension become smaller toward the inner side in the axial direction.
  • the tapered portion 40 is inclined in a direction in which both circumferential side surfaces approach each other toward the inner side in the axial direction, and the radially outer end surface is directed in the radially inward direction as it goes inward in the axial direction. It is inclined.
  • the radial height dimension of the tapered portion can be made constant without changing in the axial direction.
  • the circumferential width W 39 of the straight portion 39 is the circumferential direction of the insertion hole 30 of the elastic member 19. It is larger than the circumferential interval t 30 between both side edges (W 39 > t 30 ).
  • the circumferential width dimension W 39 of the straight portion 39 is not only the circumferential interval t 30 between the tip surfaces of the elastic protrusions 32 facing in the circumferential direction among the circumferential side edges of the insertion hole 30 but also elastic. It is larger than the circumferential interval between the portions deviated from the protrusion 32 in the radial direction.
  • Circumferential width dimension W 39 of the straight portion 39 is smaller than the circumferential spacing T 21 of the intermediate transfer teeth 21 adjacent (W 39 ⁇ T 21).
  • the circumferential width dimension of the axially outer end edge of the tapered portion 40 is equal to the circumferential width dimension W 39 of the straight portion 39.
  • the circumferential width dimension W 40 of the inner end edge in the axial direction of the tapered portion 40 is smaller than the circumferential interval t 30 between the circumferential side edges of the insertion hole 30 of the elastic member 19 (W 40 ⁇ t 30 ).
  • the cross-sectional shape of the side surface in the circumferential direction of the tapered portion 40 with respect to a virtual plane orthogonal to the radial direction of the end portion transmission teeth 37 is a linear shape.
  • the magnitude of the inclination angle ⁇ of the circumferential side surface of the tapered portion 40 with respect to the circumferential side surface of the straight portion 39 is not particularly limited.
  • the inclination angle ⁇ can be set to an arbitrary angle in the range of about 10 to 50 degrees.
  • the inclination angle ⁇ should be smaller from the viewpoint of reducing the force required for pushing.
  • the inclination angle ⁇ is preferably 45 degrees or less, more preferably 30 degrees or less, and further preferably 15 degrees or less.
  • the cross-sectional shape of the side surface in the circumferential direction of the tapered portion 40 may be a convex curve shape as shown by a two-dot chain line in FIG.
  • a pair of end portion transmission members 18 from the inner end portion in the axial direction to the middle portion are inserted from the outer side in the axial direction into the radially inner side of both side portions in the axial direction of the coupling body 35.
  • the respective tapered portions 40 of the end transmission teeth 37 are caused to function as guide portions when inserting from the axially inner end portion to the intermediate portion of the end transmission member 18 into the radially inner side of the coupling body 35. .
  • the end transmission is performed when inserting from the inner end in the axial direction of the end transmission member 18 to the middle in the radial direction of the coupling body 35.
  • each tapered portion 40 of the tooth 37 is inserted into the insertion hole 30 of the elastic member 19.
  • This insertion operation can be easily performed because the circumferential width dimension W 40 of the inner end edge in the axial direction of the tapered portion 40 is smaller than the circumferential interval t 30 between both circumferential edges of the insertion hole 30.
  • the circumferential direction phases of the end portion transmission teeth 37 and the insertion holes 30 are matched.
  • the radial height dimension of the taper portion 40 becomes smaller toward the inner side in the axial direction, the radial position between the end portion transmission teeth 37 and the insertion hole 30 when performing this insertion operation. Matching can also be performed easily.
  • each of the end transmission teeth 37 is pushed inward in the radial direction of the combined body 35.
  • the straight portions 39 of the end transmission teeth 37 are inserted into the insertion holes 30 of the elastic member 19 and between the intermediate transmission teeth 21 adjacent in the circumferential direction.
  • One of the pair of end portion transmission members 18 is inserted into the inner side in the radial direction of both side portions in the axial direction of the coupling body 35 (FIGS. 2, 4, and FIG. 6, the straight part 39 of the end transmission tooth 37 provided on the end transmission member 18 on the right side in FIG. 7 does not rattle in the circumferential direction in the insertion hole 30 of one elastic member 19, Engage in a state having a tightening margin in the circumferential direction. Further, the straight portion 39 of the end transmission tooth 37 provided in the other end transmission member 18 (left side in FIGS. 2, 4, 6, and 7) is inserted into the insertion hole 30 of the other elastic member 19. Engage in a state where there is no rattling in the circumferential direction, preferably with a circumferential margin.
  • the elastic member 19 is provided with elastic protrusions 32 on both circumferential edges of the insertion hole 30, and the elastic protrusions 32 of the elastic member 19 and the end transmission teeth 37 of the end transmission member 18 are straight.
  • the portion 39 can be elastically engaged, and the rattling prevention effect is more appropriately realized.
  • Both the straight portion 39 of the one end transmission member 18 and the straight portion 39 of the other end transmission member 18 are engaged with each other between the adjacent intermediate transmission teeth 21 via a circumferential gap. That is, as shown in FIG. 9, a first circumferential gap ⁇ exists between the circumferential side surfaces of the straight portion 39 of the end transmission tooth 37 and the intermediate transmission tooth 21.
  • the end transmission teeth 37 can be engaged with the insertion hole 30 of the elastic member 19 with a circumferential gap interposed therebetween.
  • the circumferential clearance ⁇ is made larger than the circumferential clearance.
  • a radial gap ⁇ is interposed between the radially outer end surface of the end transmission teeth 37 and the bottom surface of the portion between the adjacent intermediate transmission teeth 21 (the inner peripheral surface of the intermediate cylinder portion 20).
  • the radial gap ⁇ is smaller than the radial gap ⁇ ( ⁇ ⁇ ).
  • a radial gap ⁇ is interposed between the bottom surface of the portion between the adjacent end transmission teeth 37 (the outer peripheral surface of the end cylindrical portion 36) and the inner peripheral surface of the elastic member 19, and the adjacent end portions
  • a radial clearance ⁇ is interposed between the bottom surface of the portion between the transmission teeth 37 and the radially inner end surface that is the tip surface of the intermediate transmission tooth 21.
  • the radial gap ⁇ is smaller than the radial gap ⁇ ( ⁇ ⁇ ).
  • the end cylinder portion 36 of the one end transmission member 18 is attached to the distal end portion of the output shaft 12a (see FIGS. 1 and 2).
  • a structure capable of transmitting torque such as a cylindrical surface fitting having a fastening margin, a spline fitting having a fastening margin, and caulking.
  • the end cylinder portion 36 of the other end transmission member 18 is externally fitted and fixed to the proximal end portion of the worm 7a (see FIGS. 1 and 2), similarly to the one end transmission member 18.
  • the end transmission member 18 can also be formed integrally with the distal end portion of the output shaft 12a and the proximal end portion of the worm 7a.
  • the axial distance L 38 between the axial inner surfaces of the flange portions 38 of the pair of end transmission members 18 is larger than the axial width dimension W 35 of the combined body 35 (L 38 > W 35).
  • the axial position of the coupling body 35 is regulated by the axial inner side surfaces of the flange portions 38 of the pair of end portion transmission members 18. That is, the coupling body 35 can be displaced in the axial direction only between the axial inner surfaces of the flanges 38 of the pair of end portion transmission members 18. Further, in this state, there is an axial gap between the axially inner end surfaces of the pair of end portion transmission members 18.
  • the operation of fixing one end transmission member 18 to the output shaft 12a of the electric motor 6 and the other end transmission member 18 to the base end of the worm 7a An operation of inserting one end transmission member 18 from the inner end in the axial direction to the middle thereof into the radially inner side of the coupling body 35, and an intermediate operation from the inner end in the axial direction of the other end transmission member 18.
  • the operation of inserting up to the portion into the radially inner side of the coupled body 35 can be performed in an appropriate order.
  • the operator visually observes the inside of the housing 3, for example, when inserting the axially inner end portion to the intermediate portion of the end transmission member 18 into the radially inner side of the coupling body 35.
  • each tapered portion 40 of the end transmission teeth 37 can function as a guide portion. It can be carried out.
  • the rotational torque of the output shaft 12a is one end transmission member.
  • 18, one elastic member 19, intermediate transmission member 17, the other elastic member 19, the other end transmission member 18, and the worm 7 a are transmitted in this order.
  • the rotational torque of the output shaft 12 a is transmitted from one end transmission member 18 to one elastic member 19 through an engagement portion between the end transmission teeth 37 and the insertion hole 30.
  • the torque transmitted to one elastic member 19 is transmitted to the intermediate transmission member 17 through the engagement portion between the engagement concave portion 29 of one elastic member 19 and the engagement convex portion 26 of the intermediate transmission member 17.
  • the torque transmitted to the intermediate transmission member 17 is transmitted to the other elastic member 19 through an engagement portion between the engagement convex portion 26 of the intermediate transmission member 17 and the engagement concave portion 29 of the other elastic member 19.
  • the torque transmitted to the other elastic member 19 is transmitted to the other end transmission member 18 and the worm 7 a through the engaging portion between the insertion hole 30 and the end transmission teeth 37.
  • the mutually opposing circumferential side surfaces of a pair of adjacent intermediate transmission teeth 21 are parallel to each other, and both circumferential side surfaces of the end transmission teeth 37 are also parallel to each other. It has become.
  • the circumferential side surfaces of the intermediate transmission teeth 21 and the end transmission teeth 37 are adjacent to each other in the circumferential direction so that the circumferential side surfaces of the intermediate transmission teeth 21 and the end transmission teeth 37 can easily come into contact with each other (surface contact).
  • At least one of a configuration in which the circumferential side surfaces of the pair of intermediate transmission teeth 21 facing each other is inclined and a configuration in which the circumferential side surfaces of the end transmission teeth 37 are inclined to each other is adopted. You can also.
  • the torsional rigidity of the torque transmission joint 16 decreases when the torque to be transmitted is small and increases when the torque to be transmitted is large. Has characteristics. However, when the present invention is implemented, for example, the torsional rigidity of the torque transmission joint 16 is increased in two stages by making the circumferential clearance ⁇ different from each other between the pair of end transmission members 18. Can also be more.
  • each of the pair of end portion transmission members 18 radial gaps are respectively formed in the engagement portions between the end portion transmission teeth 37 and the elastic member 19 and the engagement portions between the end portion transmission teeth 37 and the intermediate transmission teeth 21. ⁇ , ⁇ , ⁇ , and ⁇ are present.
  • the axial distance L 39 between the end side surfaces 39 of the pair of end transmission members 18 is larger than the axial width dimension W 35 of the combined body 35 (L 39 > W 35 ).
  • the axially intermediate portions of the axially outer surfaces on both sides of the combined body 35 that are opposed to the respective end side surfaces 39 of the pair of end transmitting members 18 in the axial direction are axially directed toward the radially outer side.
  • the inclined side surface portions 27 and 34 are inclined in the inward direction. For this reason, the inclination of the central axes of the coupling body 35 and the pair of end portion transmission members 18 can be allowed without difficulty.
  • the axially outer side surface of the elastic member 19 is the axial direction of the engaging convex portion 26. It is located on the outer side in the axial direction than the outer surface. Therefore, the intermediate transmission member 17 is displaced in the axial direction between the end side surfaces 39 of the pair of end transmission members 18, or a large eccentricity is generated between the pair of end transmission members 18. Even when an inclination or the like occurs, the end side surface portion 39 is prevented from coming into contact with the axially outer side surface of the engaging convex portion 26 based on the presence of the elastic member 19.
  • the intermediate transmission teeth are provided in the radially inner portion of the intermediate transmission member, and the end transmission teeth are provided in the radially outer portion of the pair of end transmission members.
  • the intermediate transmission teeth are provided in the radially outer portion of the intermediate transmission member, and the end transmission teeth are provided in the radial inner portion of the end transmission member. It can also be adopted.
  • the elastic member is composed of a pair of elastic members including an elastic member that engages with one end transmission member and an elastic member that engages with the other end transmission member.
  • the elastic member is constituted by a single elastic member including a portion that engages with one end transmission member and a portion that engages with the other end transmission member. You can also.
  • the elastic member can be assembled to the intermediate transmission member using the elasticity of the elastic member.
  • the number and the circumferential position of the engagement protrusions of the intermediate transmission member, and the engagement recesses of the elastic member are not particularly limited.
  • each of the end transmission members 18a is a part (in the example shown in the figure) of a plurality (eight in the illustrated example) of the end transmission teeth 37a and 37b that are arranged at intervals in the circumferential direction.
  • the four axially inner end surfaces of the end transmission teeth 37a are positioned on the inner side in the axial direction of the axially inner end surfaces of the remaining end transmission teeth 37b. That is, in this example, some of the end transmission teeth 37a correspond to guide transmission teeth, and the axially inner end portion including the tapered portion 40 of the end transmission teeth 37a is the remaining end transmission. It protrudes inward in the axial direction from the axial inner end edge of the tooth 37b.
  • Each outer end portion and intermediate portion in the axial direction of the end transmission teeth 37 a are configured by a straight portion 39, and the inner end portion in the axial direction is configured by a tapered portion 40.
  • the end portion cylindrical portion includes a tapered portion 40 of the end transmission tooth 37a and a reinforcing portion 41 which is a circumferential portion in which the tapered portion 40 is coupled to the outer peripheral surface of the inner end portion in the axial direction of the end cylindrical portion 36a. It protrudes inward in the axial direction with respect to the other circumferential direction portion (the portion deviated in the circumferential direction from the reinforcing portion 41) of the axially inner end portion of 36a.
  • the shape of the reinforcing portion 41 viewed from the inner side in the axial direction is a fan shape centering on the central axis of the end transmission member 18a, and both side surfaces in the circumferential direction of the reinforcing portion 41 are more circumferential than both side surfaces in the circumferential direction of the tapered portion 40. Projected on both sides.
  • the axial inner end surface of the reinforcing portion 41 and the axial inner end surface of the end transmission tooth 37a are arranged in the same virtual plane orthogonal to the central axis of the end cylindrical portion 36a, and are at the same axial position. Exists.
  • the end portion transmission teeth 37b are configured by a straight portion 39 except for the chamfered portion 42 provided at the peripheral edge portion of the inner edge portion in the axial direction.
  • the axial dimension of the chamfered portion 42 is sufficiently smaller than the axial dimension of the tapered portion 40, and is about 1/8 of the axial dimension of the tapered portion 40 in the illustrated example.
  • the circumferential width dimension of the inner end edge in the axial direction of the portion where the chamfered portion 42 of the end transmission tooth 37b is provided is the circumferential interval t 30 between both circumferential edges of the insertion hole 30 of the elastic member 19 (FIG. 8).
  • each end transmission tooth 37b and the portion of the axially inner end surface of the end tube portion 36a that deviates in the circumferential direction from the reinforcing portion 41 are the central axis of the end tube portion 36a.
  • a chamfering part can also be provided in the peripheral part of the axial direction inner edge part of the taper part 40.
  • the arrangement of the end transmission teeth 37a which are guide transmission teeth, in the circumferential direction between one end transmission member and the other end transmission member constituting the pair of end transmission members 18a.
  • the phases are shifted from each other by a half pitch.
  • the taper part 40 and the reinforcement part 41 of one edge part transmission member 18a, and the taper part 40 and the reinforcement part 41 of the other edge part transmission member 18a are alternately with respect to the circumferential direction, and the edge part transmission member 18a.
  • the tapered portion 40 and the reinforcing portion 41 of the one end transmission member 18a and the tapered portion 40 and the reinforcing portion 41 of the other end transmission member 18a are connected to the shaft.
  • the axial insertion amount of the pair of end transmission members 18a to the radially inner side of the combined body 35 can be increased. Accordingly, the engagement length in the axial direction between the straight portion 39 of each of the end transmission teeth 37a and 37b and the intermediate transmission tooth 21 is increased, so that larger torque can be transmitted.
  • a portion projecting inward in the axial direction from the remaining end transmission teeth 37b is configured by the taper portion 40, and the remaining portion is configured by the straight portion 39.
  • the remaining portion of the end portion transmission tooth 37b excluding the chamfered portion 42 provided at the inner end edge in the axial direction is constituted by the straight portion 39.
  • the axial dimension of the straight part 39 of the teeth 37a and 37b can be made larger than the axial dimension of the straight part 39 of the end part transmission tooth 37 of the first example of the embodiment. Accordingly, it is possible to increase the engagement length in the axial direction between the straight portions 39 of all the end transmission teeth 37a and 37b and the intermediate transmission teeth 21, thereby transmitting a larger torque.
  • the taper portion 40 is reinforced by the reinforcing portion 41, even when the taper portion 40 collides with another object during assembly work or during operation of the electric power steering device, The tapered portion 40 is not easily damaged. Further, the tapered portion 40 and the reinforcing portion 41 of the one end portion transmission member 18a and the tapered portion 40 and the reinforcing portion 41 of the other end portion transmission member 18a are alternately arranged in the circumferential direction and in the first circumferential direction. Since the second circumferential gap ⁇ that is larger than the gap ⁇ (see FIG.
  • the circumferential side surface of the reinforcing portion 41 is at least a plane that is in surface contact with the circumferential side surface of the mating reinforcing portion 41 during torque transmission, for example, orthogonal to the circumferential direction. It is preferable that it is constituted by a flat surface.
  • the transmission member 18b or the end transmission member 18c having a configuration in which the end transmission teeth 37a (tapered portion 40 and reinforcing portion 41) shown in FIG. 12 are arranged only at one place in the circumferential direction can be employed. .
  • each configuration can be selectively or additionally adopted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention concerne une structure d'un joint pour une transmission de couple, au moyen de laquelle l'apparition de sons anormaux peut être réduite au minimum lorsque la direction de rotation d'un arbre d'entraînement est inversée. Un élément de transmission intermédiaire 17 possède des dents de transmission intermédiaires 21 dans plusieurs emplacements circonférentiels. Chaque élément d'une paire d'éléments de transmission d'extrémité 18 a des dents de transmission d'extrémité 37 dans plusieurs emplacements circonférentiels. Chaque élément d'une paire d'éléments élastiques 19 possède des trous d'insertion, dans lesquels les dents de transmission d'extrémité 37 sont insérées axialement, dans plusieurs emplacements circonférentiels. Les dents de transmission d'extrémité 37, une fois insérées axialement dans les trous d'insertion, et les dents de transmission intermédiaires 21 sont disposées en alternance dans la direction circonférentielle, des premiers espaces circonférentiels étant ménagés entre celles-ci. Les parties d'extrémité axialement intérieures des dents de transmission d'extrémité 37 sont pourvues de parties effilées 40 pour lesquelles la dimension de largeur circonférentielle diminue vers le côté axialement intérieur, et la dimension de largeur circonférentielle des bords d'extrémité axialement intérieures est inférieure aux espaces circonférentiels entre les deux bords latéraux circonférentiels des trous d'insertion 30.
PCT/JP2019/009759 2018-03-12 2019-03-11 Joint pour transmission de couple et dispositif de direction assistée électrique WO2019176871A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112019001285.1T DE112019001285T5 (de) 2018-03-12 2019-03-11 Verbindungseinrichtung zur drehmomentübertragung und elektrische servolenkeinrichtung
JP2020506518A JP6947287B2 (ja) 2018-03-12 2019-03-11 トルク伝達用継手および電動式パワーステアリング装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018043980 2018-03-12
JP2018-043980 2018-03-12

Publications (1)

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WO2019176871A1 true WO2019176871A1 (fr) 2019-09-19

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JP (1) JP6947287B2 (fr)
DE (1) DE112019001285T5 (fr)
WO (1) WO2019176871A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013177955A (ja) * 2012-01-31 2013-09-09 Nsk Ltd トルク伝達用継手及び電動式パワーステアリング装置
WO2017010087A1 (fr) * 2015-07-13 2017-01-19 バンドー化学株式会社 Accouplement
WO2017110330A1 (fr) * 2015-12-25 2017-06-29 ニッタ株式会社 Structure de liaison d'arbre
WO2017154870A1 (fr) * 2016-03-08 2017-09-14 日本精工株式会社 Assemblage pour transmission de couple, et dispositif de direction assistée électrique
WO2018030358A1 (fr) * 2016-08-08 2018-02-15 日本精工株式会社 Joint de transmission de couple, et dispositif de servodirection électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013177955A (ja) * 2012-01-31 2013-09-09 Nsk Ltd トルク伝達用継手及び電動式パワーステアリング装置
WO2017010087A1 (fr) * 2015-07-13 2017-01-19 バンドー化学株式会社 Accouplement
WO2017110330A1 (fr) * 2015-12-25 2017-06-29 ニッタ株式会社 Structure de liaison d'arbre
WO2017154870A1 (fr) * 2016-03-08 2017-09-14 日本精工株式会社 Assemblage pour transmission de couple, et dispositif de direction assistée électrique
WO2018030358A1 (fr) * 2016-08-08 2018-02-15 日本精工株式会社 Joint de transmission de couple, et dispositif de servodirection électrique

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JPWO2019176871A1 (ja) 2021-02-04
JP6947287B2 (ja) 2021-10-13

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