WO2007063780A1 - Mecanisme d'accouplement d'arbres pour dispositif de direction a assistance electrique - Google Patents

Mecanisme d'accouplement d'arbres pour dispositif de direction a assistance electrique Download PDF

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Publication number
WO2007063780A1
WO2007063780A1 PCT/JP2006/323502 JP2006323502W WO2007063780A1 WO 2007063780 A1 WO2007063780 A1 WO 2007063780A1 JP 2006323502 W JP2006323502 W JP 2006323502W WO 2007063780 A1 WO2007063780 A1 WO 2007063780A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation transmission
rotation
protrusion
shaft
buffer member
Prior art date
Application number
PCT/JP2006/323502
Other languages
English (en)
Japanese (ja)
Inventor
Katsunori Saito
Masao Shimura
Original Assignee
Oiles Corporation
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 Oiles Corporation filed Critical Oiles Corporation
Publication of WO2007063780A1 publication Critical patent/WO2007063780A1/fr

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Classifications

    • 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
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/12—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted for accumulation of energy to absorb shocks or vibration
    • 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 shaft coupling mechanism suitable for coupling a rotation shaft on a rotation source side such as an electric motor in an electric power steering apparatus and a rotation shaft on an operation side such as a steering shaft of an automobile.
  • Patent Document 1 Japanese Translation of Special Publication 2002-518242
  • Patent Document 2 JP-A-2004-148990
  • Patent Document 3 Japanese Unexamined Patent Application Publication No. 2004-149070
  • An electric power steering device adds a rotational force based on the rotation of the output rotation shaft of an electric motor to a rotational force based on the rotation of a manually operated steering wheel (a handle) to manually steer the steering wheel.
  • the steering shaft on the steering wheel side and the rotary shaft on the output rotation shaft side of the electric motor are connected to each other by a shaft coupling mechanism (coupling). ).
  • the present invention has been made in view of the above-described points, and an object of the present invention is to provide a rotating shaft connected to an output rotating shaft of, for example, an electric motor, which is one rotating shaft even after long-term use.
  • the backlash in the direction around the shaft center is less likely to occur between the other rotating shaft, for example, the steering shaft connected to the steering wheel. It is therefore an object of the present invention to provide a shaft coupling mechanism for an electric power steering apparatus that is excellent in durability and does not make the steering feeling uncomfortable.
  • the shaft coupling mechanism according to the present invention which is arranged between two rotating shafts so as to transmit the rotation of one rotating shaft to the other rotating shaft and connects the two rotating shafts, is spaced apart in the axial direction.
  • a rotation transmitting member integrally having a pair of rotation transmitting portions and an inner central portion that couples the pair of rotation transmitting portions to each other, and the pair of rotation transmitting portions of the rotation transmitting member.
  • a holding means for holding a position in the direction around the axis of the rotation transmission buffer member relative to the rotation transmission member.
  • each of the pair of rotation transmission units includes:
  • the rotation transmission buffer member has at least a pair of protrusions that are spaced apart from each other in the direction around the shaft center and that extend in the radial direction.
  • a pair of protrusions, and the pair of protrusions of the rotation transmission buffer member has rigidity smaller than the rigidity of each pair of protrusions of the rotation transmission part and can be elastically deformed. And between the inner central portion and the outer central portion and between at least one of the protrusion of the rotation transmitting portion and the protrusion of the rotation transmitting shock absorbing member.
  • the rotation transmission buffer member disposed between the pair of rotation transmission portions in the axial direction is between the pair of protrusions of the pair of rotation transmission portions in the axial direction.
  • the pair of protrusions of the rotation transmission buffer member are rotation transmission parts.
  • the transmission of the minute rotation of one rotating shaft to the other rotating shaft can be reduced or prevented by elastic deformation of the pair of protrusions of the rotation transmitting buffer member, and the other of the one rotating shaft
  • the transmission of the large relative rotation to the other rotation shaft can be performed as it is through the projections of the pair of rotation transmission portions having rigidity higher than the pair of projections of the rotation transmission buffer member,
  • the shaft at the pair of protrusions of the rotation transmission buffer member In order to prevent large deformation of the pair of protrusions of the rotation transmission buffer member by the protrusions of the pair of rotation transmission parts having a large rigidity when the elastic deformation exceeds a certain level in the surrounding direction, Even with the use of a flexible and low-strength resin material, permanent deformation of the rotation transmission buffer member due to creep can be reduced, and in addition, a pair of rotation transmission parts in which the rotation transmission members are arranged at intervals in the axial direction.
  • a holding means for holding the position in the direction around the axis of the rotation transmission buffer member with respect to the rotation transmission member.
  • the holding means includes a protrusion provided on one surface of the inner central portion and the outer central portion facing each other, and the other of the inner surfaces of the inner central portion and the outer central portion facing each other. Provided with a hole that is provided on the surface and fitted with a protrusion, or has a welded portion on both sides of the inner central portion and the outer central portion that face each other.
  • Another shaft coupling mechanism which is arranged between two rotating shafts so as to transmit the rotation of one rotating shaft to the other rotating shaft and connects the two rotating shafts, includes a rotation transmitting portion. And a rotation transmission member integrally having a central portion, a rotation transmission buffer member superimposed on the rotation transmission member in the axial direction, and a position in a direction around the axis of the rotation transmission buffer member with respect to the rotation transmission member.
  • the rotation transmitting portion has at least a pair of protrusions extending in the central force radial direction and spaced apart from each other in the direction around the shaft center.
  • the rotation transmission buffer member is overlapped with the other central portion that is axially overlapped with the central portion, and is overlapped with the protrusion of the rotational transmission member in the axial direction and the protrusion of the rotation transmission member.
  • the holding means has a rigidity smaller than the rigidity of the pair of protrusions of the rotation transmission member and is elastically deformable, and the holding means is between the center part and the other center part and between the protrusions of the rotation transmission part and the rotation transmission buffer. It is provided between at least one of the protrusions of the member.
  • the rotation transmission buffer member superimposed in the axial direction on the rotation transmission member is overlapped on the protrusion of the rotation transmission unit in the axial direction! And a pair of protrusions having a width larger than the width in the direction around the axis of each protrusion, and the pair of protrusions of the rotation transmission buffer member is the rigidity of the pair of protrusions of the rotation transmission part.
  • the transmission of the minute rotation of one rotating shaft to the other rotating shaft can be reduced or prevented by elastic deformation of the pair of protrusions of the rotation transmitting buffer member, and the large rotation of one rotating shaft relative to the other rotating shaft can be reduced.
  • the transmission to the other rotating shaft It has greater rigidity than the protrusion, and can be obtained as it is through the protrusion of the rotation transmission part.
  • the elastic force is also more than a certain level in the direction around the axis of the protrusion of the rotation transmission buffer member. Since the protrusion of the rotation transmission buffer member with high rigidity can prevent large deformation of the protrusion of the rotation transmission buffer member, the rigidity of the rotation transmission buffer member is small.
  • the holding means includes a protrusion provided on one surface of both surfaces of the central portion and the other central portion, and a central portion. And the other central part face each other even if it is provided on the other side of both surfaces facing each other and a hole into which the protrusion fits.
  • the rotation You may have the welding part in the both surfaces which the protrusion part of a transmission member and the protrusion part of a rotation transmission buffer part material mutually face.
  • the rotation transmitting member is preferably formed of a hard resin such as a polyacetal resin or a polyamide resin, but a hard material exhibiting other rigidity.
  • the rotation transmission shock absorbing member which may be formed of a resin is also formed with rubber elastic body force such as urethane rubber, silicone rubber and polyester elastomer.
  • the rotation transmission member and the rotation transmission buffer member are manufactured by two-color molding or insert molding.
  • the rotation transmission buffer member is molded.
  • the molding order of the rotation transmission member and the rotation transmission buffer member may be determined based on the materials used for them. Accordingly, in the molding of the rotation transmission member and the rotation transmission buffer member, when these materials are welded to each other by applying heat, it is preferable to use the welded portion as a holding means.
  • the shaft coupling mechanism includes a rotation transmission member and a rotation transmission buffer member disposed between the two rotation shafts as a spacer in the direction around the axis.
  • the shaft connecting mechanism includes one connecting base connected to one rotating shaft and the other connecting base connected to the other rotating shaft.
  • the one connecting base includes a base and the base.
  • the other connecting base body has a base and a protrusion that protrudes integrally in the axial direction, and the other connecting base has a protrusion that protrudes integrally in the axial direction.
  • the protrusions of the connection base and the protrusions of the other connection base are the center of the protrusion of the rotation transmission member and the protrusion of the rotation transmission buffer member overlapped with the protrusion in the axial direction V, respectively.
  • the one and the other are arranged in the surrounding direction!
  • the protrusions of the connection base of each of the connecting bases are on their respective sides in the direction around the shaft center, and the shaft center circumference is detected when the rotation of the two rotation shafts is below a certain level.
  • One connecting base may be directly connected to and fixed to one rotating shaft, but may be indirectly connected to one rotating shaft via another rotating transmission mechanism such as a gear mechanism. The same applies to the other connecting base.
  • the shaft coupling mechanism of the present invention may be for an electric power steering apparatus
  • one rotary shaft is coupled to the output rotary shaft of the electric motor
  • the other rotating shaft is now connected to the steering shaft of the car!
  • a rotating shaft connected to an output rotating shaft of, for example, an electric motor, which is one rotating shaft even after long-term use, and a steering shaft connected to, for example, a steering wheel, which is the other rotating shaft,
  • the backlash in the direction around the shaft center is less likely to occur during this time, and the impact when the electric motor is reversed and the transmission of brush vibration to the steering wheel can be reduced. It is possible to provide a shaft coupling mechanism for an electric power steering device that is not allowed to be reduced.
  • FIG. 1 is a front view of a preferred example of an embodiment of the present invention.
  • FIG. 2 is a partially broken front view of the example shown in FIG.
  • Fig. 3 is a sectional view taken along line III-III of the example shown in Fig. 1.
  • FIG. 4 is a right side view of the combination of the rotation transmission member and the rotation transmission buffer member in the example shown in FIG.
  • FIG. 5 is a right side view of the connecting base on the rotating shaft side in the example shown in FIG.
  • FIG. 6 is a left side view of the coupling base on the steering shaft side in the example shown in FIG.
  • FIG. 7 is a right side view of the rotation transmission member of the example shown in FIG.
  • FIG. 8 is a plan view of the rotation transmission member shown in FIG.
  • FIG. 9 is a cross-sectional view of the rotation transmission member shown in FIG.
  • FIG. 10 is a cross-sectional view of the rotation transmission member shown in FIG.
  • FIG. 11 is a right side view of the rotation transmission buffer member of the example shown in FIG.
  • FIG. 12 is a cross-sectional view taken along the line XII-XII of the rotation transmission buffer member shown in FIG.
  • FIG. 13 is a right side view of another example of a combination of a rotation transmission member and a rotation transmission buffer member applicable to the example shown in FIG.
  • FIG. 14 is a cross-sectional view of the combination shown in FIG.
  • FIG. 15 is a right side view of the rotation transmission member shown in FIG.
  • FIG. 16 is a cross-sectional view of the rotation transmitting member shown in FIG.
  • FIG. 17 is a right side view of the rotation transmission buffer member shown in FIG.
  • FIG. 18 is a cross-sectional view taken along line XVIII-XVIII of the rotation transmission buffer member shown in FIG. 17, and FIG. 19 is still another combination of the rotation transmission member and the rotation transmission buffer member applicable to the example shown in FIG. Example right side view,
  • FIG. 20 is a cross-sectional view taken along the line XX—XX of the combination shown in FIG.
  • FIG. 21 is a right side view of still another example of a combination of a rotation transmission member and a rotation transmission buffer member applicable to the example shown in FIG.
  • FIG. 22 is a cross-sectional view of the combination shown in FIG. 21 taken along line XXII—XXII,
  • FIG. 23 is a right side view of the rotation transmission member shown in FIG. 24 is a cross-sectional view of the rotation transmission member shown in FIG. 23 taken along the line XXIV-XXIV.
  • FIG. 25 is a right side view of the rotation transmission buffer member shown in FIG.
  • 26 is a cross-sectional view taken along the line XXV-XXV of the rotation transmission buffer member shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • the shaft coupling mechanism 1 for the electric power steering apparatus of this example includes a coupling base 3 coupled to a rotating shaft 2 and a coupling coupled to a steering shaft 4 as a rotating shaft.
  • the steering shaft 4 is rotated between the rotating shaft 2 and the steering shaft 4 via the base 5 and the connecting bases 3 and 5, and the rotation in the R direction, which is the direction around the axis of the rotating shaft 2, is applied to the steering shaft 4.
  • the rotating shaft 2 is a rotating shaft on the electric motor side of the electric power steering apparatus
  • the rigid connecting base 3 is formed of an annular base 11 and one of the base 11 as shown in FIG.
  • Two pairs of protrusions 13 projecting integrally from the annular surface 12 in the axial direction, that is, the A direction, and arranged at an equiangular interval of 90 ° in the R direction, and a through-hole into which the rotary shaft 2 is fitted
  • the rigid connecting base body 5 includes an annular base portion 16 and one annular surface 17 of the base portion 16 integrally protruding in the A direction. It has two pairs of protrusions 18 arranged at equal angular intervals of 90 ° in the R direction, and a through hole 19 into which the steering shaft 4 is fitted.
  • Each of the protrusions 13 has side surfaces 21 and 22 as a pair of rigid rotation transmission surfaces in the R direction, and each of the protrusions 18 also serves as a pair of rigid rotation transmission surfaces in the R direction. Having sides 23 & 24!
  • a rigid rotation transmission member 6 in which polyacetal resin, polyamide resin, and the like are integrally formed is a pair of rotation transmissions arranged at intervals in the A direction, as shown in FIGS. Parts 31 and 32 and an annular inner central portion 33 that couples the pair of rotation transmitting portions 31 and 32 to each other, and each of the rotation transmitting portions 31 and 32 has an inner central portion 33.
  • an annular base 34 formed integrally with the inner central portion 33 and spaced apart from each other at an equal angular interval of 45 ° in the R direction.
  • four pairs of protrusions 35 that extend in the radial direction and are provided integrally with the base 34, and each protrusion 35 has side surfaces 38 and 39 as a pair of rigid rotation transmission surfaces in the R direction. is doing.
  • the rotation transmission buffer member 7 disposed between the pair of rotation transmission parts 31 and 32 of the rotation transmission member 6 has rigidity smaller than that of the rotation transmission member 6 and is elastically deformable.
  • the rotation transmission shock-absorbing member 7 is integrally formed with a rubber elastic body such as rubber, polyester elastomer, etc., and is particularly concentric with the inner central portion 33 as shown in FIGS. 11 and 12.
  • D and has four pairs of protrusions 46 formed integrally with the outer central part 45 and extending radially from the outer central part 45!
  • the number of rotation transmission parts 31 and 32 is the same as the number of protrusions 35 in the R direction!
  • the protrusions 46 spaced apart from each other at equiangular intervals have rigidity smaller than the rigidity of the respective protrusions 35 of the rotation transmitting parts 31 and 32 and are elastically deformable.
  • the rotation transmission buffer member 7 is flat at a surface 50 facing the flat surface 49 in the A direction of each of the rotation transmission portions 31 and 32.
  • the holding means 8 is provided on one surface 56 of the annular central surfaces 55 and 56 of the inner central portion 33 and the outer central portion 45 facing each other at an equal angular interval in the R direction.
  • the eight protrusions 57 and the other surface 55 of the inner central portion 33 and the outer central portion 45 facing each other 55 and 56 are provided apart from each other at equal angular intervals in the R direction.
  • the holding means 8 of this example is provided between the inner central portion 33 and the outer central portion 45.
  • each of the protrusions 13 of the connection base 3 and the protrusion of the connection base 5 Each of the portions 18 includes the protrusion 35 of the rotation transmitting portions 31 and 32 and the protrusion 46 of the rotation transmission buffer member 7 that is overlapped and overlapped with the protrusion 35 in the A direction.
  • each protrusion 13 of the connecting base 3 is at its side surfaces 21 and 22 in the R direction and in the R direction.
  • Two rotation shafts, the rotation shaft 2 and the steering shaft 4, are arranged between the rotation shaft 2 and the steering shaft 4 so as to transmit the rotation of the rotation shaft 2 in the R direction to the steering shaft 4.
  • the steering shaft 4 rotates in the R direction, and the steering shaft 4 moves in the R direction.
  • the rotation is transmitted as a reciprocating motion to a drag link via a transmission mechanism such as a gear (not shown) to give a steering force to the steered wheel (wheel).
  • the steering wheel 4 is not manually rotated by the driver and the steering shaft 4 is not rotated in the R direction.
  • the state or the steering wheel is manually operated by the driver and the steering shaft 4 is moved in the R direction. If the relative rotation in the R direction of the rotating shaft 2 with respect to the steering shaft 4 is very small within about half the difference between the width D and the width d As a result, the protrusion 46 is easily compressed and deformed, so that the minute relative rotation in the R direction of the rotating shaft 2 is hardly transmitted to the steering shaft 4, and thus, the shaft coupling mechanism 1 and the steering shaft 4. It is possible to reduce the impact when the electric motor reverses through the brush and the transmission of brush vibration to the steering wheel, so that the steering feeling is not uncomfortable.
  • the rotation transmission member 6 rotates with respect to the steering shaft 4 by rotating the steering shaft 4 in the R direction by the manual operation by the driver of the steering wheel and rotating the rotating shaft 2 in the R direction by the operation of the electric motor.
  • axis 2 is more than a certain value, that is, when the relative rotation in the R direction is about half or more of the difference between width D and width d, contact of side 21 with side 38 or contact of side 22 with side 39
  • the rotation of the rotating shaft 2 in the R direction is transmitted to the steering shaft 4 in response to the relative rotation in the R direction more than a certain level. Assist in the rotation of 4.
  • the rotation transmission buffer member 7 disposed between the rotation transmission portions 31 and 32 is disposed between the protrusions 35 of the rotation transmission portions 31 and 32 in the A direction.
  • the rotation of the rotation shaft 2 in the R direction is transmitted to the steering shaft 4 through the elastic deformation of the protrusion 46 of the rotation transmission buffer member 7.
  • transmission of the minute rotation of the rotating shaft 2 in the R direction to the steering shaft 4 can be reduced or prevented by elastic deformation of the protrusion 46 of the rotation transmitting buffer member 7 and a large amount of the rotating shaft 2 relative to the steering shaft 4 can be obtained.
  • the transmission of the relative rotation in the R direction to the steering shaft 4 is larger than the protrusion 46 of the rotation transmission buffer member 7.
  • the rotation transmission member 6 having a sufficient rigidity can be carried out as it is through the protrusion 35, and the force is also a rotation with a large rigidity when the rotation axis 2 of the rotation axis 2 with respect to the steering axis 4 is more than a certain relative rotation.
  • the rotation transmission buffer member 7 is made of a flexible and rigid low-resin material. In addition, permanent deformation of the protrusion 46 of the rotation transmission shock absorbing member 7 due to creep can be reduced, and in addition, the rotation transmission member 6 is arranged at intervals in the A direction. A pair of rotation transmitting portions 31 and 32 and an inner central portion 33 that couples the pair of rotation transmitting portions 31 and 32 to each other, and the rotation transmitting buffer member 7 Since the holding means 8 for holding the position in the R direction is provided, the rotation transfer member 6 can be integrally formed, and the assembling property can be improved.
  • the rotation transmission buffer member 7 is positioned with respect to the rotation transmission unit 6 with respect to the R direction by the holding means 8, so that the rotation shaft 2 and the steering shaft 4 are relatively
  • the effects of the rotation transmission buffer member 7 can be evenly obtained with respect to both rotations in the R direction.
  • the shaft coupling mechanism 1 in the above example is composed of one rotation transmission buffer member 7, but instead of this, the rotation transmission member may be composed of two or more rotation transmission buffer members 7. You may have 6 or more powers. Further, the protrusions 13 and 18 of the connecting bases 3 and 5, the protrusion 35 of the rotation transmission member 6, the protrusion 46 of the rotation transmission buffer member 7, and the protrusion 57 and the hole 58 of the holding means 8 are not limited to the above numbers. It is.
  • the holding means 8 is not limited to the one provided between the inner central portion 33 and the outer central portion 45 as described above.
  • the holding means 8 has a cylindrical shape provided on one surface 50 of both surfaces 49 and 50 facing each other between each projection 35 of the rotation transmission member 6 and each projection 46 of the rotation transmission buffer member 7.
  • Protrusions 71, projections 35 of rotation transmission member 6 and projections 46 of rotation transmission buffer member 7 are provided on the other surface 49 of both surfaces 49 and 50 facing each other, and projections And a cylindrical hole 72 into which 71 is fitted.
  • the projection 71 has two protrusions 46 in the A direction.
  • the holes 72 are integrally provided on one surface (front and back surfaces) 50, and the holes 72 into which the protrusions 71 are fitted are provided on two surfaces (front and back surfaces) 49 in the A direction of each protrusion 35.
  • the holding means 8 shown in FIGS. 13 to 18 can also hold the position of the rotation transmission shock absorbing member 7 in the R direction with respect to the rotation transmitting member 6, and the holding means 8 of the present example can rotate.
  • the rotation of the rotary shaft 2 and the steering shaft 4 in both the relative R directions is possible.
  • the effect of the rotation transmission buffer member 7 can be obtained more evenly.
  • the holding means 8 is replaced with the projection 57 or 71 and the hole 58 or 72 as described above, and as shown in FIGS. 19 and 20, the projection 35 of the rotation transmitting member 6 and It may be provided with a welded portion 75 formed by welding both surfaces 49 and 50 facing each other with the protrusion 46 of the rotation transmission buffer member 7.
  • the welding portion 75 can be obtained by two-color molding or insert molding of the rotation transmission member 6 and the rotation transmission buffer member 7 from materials that are easily heat-welded to each other.
  • the holding means 8 shown in FIG. 19 and FIG. 20 since the projection 57 or 71 and the hole 58 or 72 are not provided, molding becomes easy.
  • the welded portion 75 provided between the protrusion 35 of the rotation transmitting portions 31 and 32 and the protrusion 46 of the rotation transmitting shock absorbing member 7 is connected to the inner central portion 33 and the outer central portion 45. You may provide in a contact surface.
  • the above-described shaft coupling mechanism 1 includes a rotation transmission member 6 integrally including a pair of rotation transmission units 31 and 32, and a rotation transmission buffer member 7 disposed between the rotation transmission units 31 and 32.
  • a rotation transmission member 6 having a rotation transmission portion 31 as shown in FIGS. 21 to 26, a rotation transmission buffer member 7 and a holding means 8 superimposed on the rotation transmission member 6 are provided.
  • the provided shaft coupling mechanism 1 may be used.
  • the rigid rotation transmission member 6 integrally formed from polyacetal resin, polyamide resin, etc. has a rotation transmission part 31 and an annular central part 33a.
  • the rotation transmission buffer member 7 has a rigidity smaller than that of the rotation transmission member 6 and is elastically deformable, and is integrally formed from a rubber elastic body such as urethane rubber, silicone rubber, polyester elastomer or the like. It is superimposed on the transmission member 6 in the A direction, the holding means 8 is adapted to hold the position of the rotation transmission buffer member 7 in the R direction with respect to the rotation transmission member 6, and the rotation transmission unit 31 is in the R direction. It has eight protrusions 35 that are spaced apart from each other at equal angular intervals of 45 ° and that extend radially from the central portion 33a and are integrally provided in the central portion 33a. Each protrusion 35 is a pair in the R direction.
  • the rotation transmission buffer member 7 includes a ring-shaped central portion 45a superimposed on the central portion 33a in the A direction, and a rotation transmission member 6 extending in the A direction. It is superimposed on the protrusion 35 of the The protrusion 35 of the rolling transmission member 6 has a width D larger than the width d in the R direction, and is formed integrally with the central portion 45a and extends radially from the central portion 45a.
  • the rotation transmission member 6 has rigidity smaller than the rigidity of each protrusion 35 and is elastically deformable, and has side surfaces 47 and 48 in the R direction. 31 is flat on the surface 50 facing the A direction 49, and the holding means 8 is provided between the central portion 33a and the central portion 45a and between the protrusion 35 of the rotation transmission portion 31 and the rotation transmission buffer. Between at least one of the protrusions 46 of the member 7, in this example, the protrusion 35 of the rotation transmission portion 31 and the protrusion 46 of the rotation transmission buffer member 7. It is provided to.
  • the holding means 8 is one surface of both surfaces 49 and 50 facing each other between the protrusion 35 of the rotation transmission member 6 and the protrusion 46 of the rotation transmission shock absorbing member 7.
  • the other surface 49 of 49 and 50 is provided with a hole 72 which is provided in the R direction and spaced apart from each other at equal angular intervals and in which a projection 71 is fitted.
  • the rotation transmission member 6, the rotation transmission buffer member 7 and the holding means 8 shown in FIGS. 21 to 26 are used together with the connection bases 3 and 5 shown in FIGS. 1 to 3, and FIGS. 5 and 6.
  • the shaft coupling mechanism 1 including the rotation transmission member 6, the rotation transmission buffer member 7, and the holding means 8 is configured so that the rotation shaft 2 transmits the rotation of the rotation shaft 2 in the R direction to the steering shaft 4 in the same manner as described above. And the rotating shaft 2 and the steering shaft 4 are connected between the steering shaft 4 and the rotating shaft 2.
  • the holding means 8 includes the protrusion provided on one surface of both surfaces 49 and 50 facing the center portions 33a and 45a, and the center portion 33a. 4 and 5a may be provided with a hole provided on the other surface of the two surfaces 49 and 50 facing each other and with a projection fitted therein, and the protrusions 35 and 46 facing each other. It is also possible to provide a welded portion on at least one of the double-sided surfaces 49 and 50 and the double-sided surfaces 49 and 50 and the central portions 33a and 45a.

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

Abstract

L'invention concerne un mécanisme d'accouplement d'arbres (1) pour un dispositif de direction à assistance électrique comportant un corps de base d'accouplement (3) accouplé sur un arbre de rotation (2), un corps de base d'accouplement (5) accouplé sur un arbre de direction (4), un organe de transmission de rotation (6) disposé entre l'arbre de rotation (2) et l'arbre de direction (4) par le biais des deux corps de base d'accouplement (3) et (5) et transmettant une rotation dans une direction R à l'arbre de direction (4), un organe d'amortissement de transmission de rotation (7) disposé sur l'organe de transmission de rotation (6), et un moyen de maintien (8) pour maintenir la position de l'organe d'amortissement de transmission de rotation (7) dans la direction R par rapport à l'organe de transmission de rotation (6).
PCT/JP2006/323502 2005-11-30 2006-11-24 Mecanisme d'accouplement d'arbres pour dispositif de direction a assistance electrique WO2007063780A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-345335 2005-11-30
JP2005345335A JP4992231B2 (ja) 2005-11-30 2005-11-30 電動式パワーステアリング装置用の軸連結機構

Publications (1)

Publication Number Publication Date
WO2007063780A1 true WO2007063780A1 (fr) 2007-06-07

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PCT/JP2006/323502 WO2007063780A1 (fr) 2005-11-30 2006-11-24 Mecanisme d'accouplement d'arbres pour dispositif de direction a assistance electrique

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WO (1) WO2007063780A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518358A1 (fr) * 2009-12-25 2012-10-31 Oiles Corporation Mécanisme d'accouplement d'arbre
EP3869056A1 (fr) * 2020-02-20 2021-08-25 Jtekt Corporation Accouplement d'arbre extensible avec un organe en matériau élastique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009286387A (ja) * 2008-05-27 2009-12-10 Hyundai Motor Co Ltd 電動式パワーステアリング装置の騒音低減装置
JP2011094766A (ja) * 2009-11-02 2011-05-12 Oriental Motor Co Ltd 出力軸と入力軸の継ぎ手構造
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