WO2011070826A1 - Procédé de fabrication d'un dispositif de direction assistée motorisé - Google Patents

Procédé de fabrication d'un dispositif de direction assistée motorisé Download PDF

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Publication number
WO2011070826A1
WO2011070826A1 PCT/JP2010/064600 JP2010064600W WO2011070826A1 WO 2011070826 A1 WO2011070826 A1 WO 2011070826A1 JP 2010064600 W JP2010064600 W JP 2010064600W WO 2011070826 A1 WO2011070826 A1 WO 2011070826A1
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WO
WIPO (PCT)
Prior art keywords
housing
bearing
rotating shaft
shaft
electric power
Prior art date
Application number
PCT/JP2010/064600
Other languages
English (en)
Japanese (ja)
Inventor
米田　篤彦
清水　康夫
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to EP10835748.4A priority Critical patent/EP2511156A4/fr
Priority to US13/514,258 priority patent/US20120233860A1/en
Priority to CN2010800460664A priority patent/CN102574541A/zh
Priority to JP2011545105A priority patent/JPWO2011070826A1/ja
Publication of WO2011070826A1 publication Critical patent/WO2011070826A1/fr

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Classifications

    • 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
    • B62D5/0421—Electric motor acting on or near steering gear
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49462—Gear making
    • Y10T29/49464—Assembling of gear into force transmitting device

Definitions

  • the present invention relates to a method for manufacturing an electric power steering device mounted on a vehicle.
  • the electric power steering device reduces the steering burden on the driver.
  • the steering torque transmitted from the steering wheel to the rotating shaft is detected by a steering torque sensor, and an electric motor is generated according to the detected steering torque.
  • the added torque is transmitted to the rotating shaft through the speed reduction mechanism.
  • Such an electric power steering device and a manufacturing method thereof are known as disclosed in Patent Documents 1 to 3, for example.
  • the electric power steering device disclosed in Patent Literature 1 and Patent Literature 2 includes an input shaft coupled to the steering wheel, an output shaft coupled to the rack and pinion mechanism, a torsion bar coupling between the input and output shafts, A steering torque sensor that detects a steering torque according to the relative torsion angle between the input and output shafts, an electric motor that generates additional torque according to the steering torque, and a speed reduction mechanism that transmits the additional torque to the output shaft ing.
  • the speed reduction mechanism is a worm gear mechanism including a worm provided on the motor shaft of the electric motor and a worm wheel attached to the output shaft.
  • the worm wheel and the first bearing adjacent thereto are press-fitted into the output shaft from below.
  • caulking is inserted into the output shaft from below and caulked.
  • the input shaft, output shaft, torsion bar, steering torque sensor, worm wheel, and the like are assembled to obtain a “partial assembly” (including adjustment of the neutral position of the steering torque sensor).
  • a second bearing is attached in advance to the lower end of the housing for housing the subassembly.
  • the subassembly is inserted into the housing from the upper end opening.
  • the lower end portion of the output shaft is fitted to the second bearing, and the first bearing is fitted to the housing.
  • a nut is inserted into the housing from the opening at the lower end of the housing, and this nut is screwed into the screw at the lower end of the output shaft.
  • the output shaft and the second bearing can be set.
  • the housing can support the output shaft via the first and second bearings.
  • the opening at the lower end of the housing is closed with a cap.
  • the worm and the electric motor are assembled, the steering torque sensor and the lid are assembled to the housing, and the assembly work is completed.
  • Patent Document 1 the method for manufacturing an electric power steering apparatus known from Patent Document 1 has a large number of parts and a large number of assembly steps, so there is room for improvement in order to increase productivity.
  • the electric power steering device known from Patent Document 2 can accommodate and mount all components from one side with respect to the housing.
  • the assembly procedure of the electric power steering device known from Patent Document 2 is as follows.
  • the worm wheel and the first bearing are attached in advance to the rotating shaft, and the second bearing is attached in advance to the lower end of the housing.
  • the worm wheel has an opening for working penetrating in the axial direction.
  • a retaining ring (fixing member) for fixing the outer ring of the first bearing to the housing is inserted into the housing from the opening at the upper end, and temporarily disposed near the position where the worm wheel is disposed.
  • a pinch-shaped tool is inserted into the working opening of the worm wheel, and the tip of the tool is hooked into the working hole of the retaining ring to reduce the diameter of the retaining ring.
  • the rotating shaft assembled with the worm wheel and the first bearing is inserted into the housing from the opening at the upper end. Then, the lower end portion of the output shaft is fitted to the second bearing, and the first bearing is fitted to the housing. Next, the position of the retaining ring is aligned with the position of the retaining ring fitting groove of the housing, and then the tool is removed from the working hole of the retaining ring. By doing so, the assembly operation of the rotating shaft to the housing is completed.
  • the steering torque sensor is constituted by a magnetostrictive torque sensor.
  • the rotating shaft has a magnetostrictive film whose magnetic characteristics are changed by a steering torque applied to the rotating shaft.
  • the electric power steering device known from Patent Document 3 can also be mounted by housing all components from one side with respect to the housing.
  • a fixing member such as a retaining ring
  • these members and the mounting position are worms. Since it is obstructed by the wheel, the operator cannot fully see. There is room for further improvement to increase productivity.
  • Japanese Patent Laid-Open No. 9-309447 Japanese Patent Laid-Open No. 11-105721 (see FIGS. 1 to 3) JP 2008-58108 A (see FIGS. 3 and 8)
  • An object of the present invention is to provide a technique capable of improving the productivity of an electric power steering apparatus.
  • the steering torque transmitted from the steering wheel to the rotating shaft is detected by the steering torque sensor, and the electric motor is generated according to the detected steering torque.
  • a method of manufacturing an electric power steering apparatus configured to transmit an additional torque to the rotating shaft via a speed reduction mechanism, the shaft mounting step for rotatably mounting the rotating shaft on a housing having an upper opening, and the shaft
  • a method of manufacturing an electric power steering apparatus including a reduction mechanism assembling step of assembling the reduction mechanism to the rotating shaft after the attaching step.
  • the shaft mounting step includes a bearing setting step of fitting an inner ring of the bearing into a fixed position of the rotating shaft, and an internal fixed position by inserting the rotating shaft and the bearing into the housing. And a bearing fixing step of fixing an outer ring of the bearing to the housing.
  • the bearing fixing member arranged so as to be adjacent to the end surface of the outer ring of the bearing facing the upper opening direction of the housing is assembled to the housing, A step of fixing an outer ring of the bearing to the housing;
  • the bearing fixing member is a member that is assembled to the housing by being fitted to a fitting portion formed in the housing.
  • the fitting portion is a fitting groove formed in the housing, and the bearing fixing member is a retaining ring fitted into the fitting groove.
  • the bearing fixing member is a lock nut that is assembled to the housing by being screwed into a female screw formed in the housing.
  • the steering torque sensor is a magnetostrictive torque sensor having a magnetostrictive portion whose magnetic characteristics are changed by the steering torque applied to the rotating shaft, and the magnetostrictive portion is provided on the rotating shaft.
  • the magnetostrictive portion setting step is performed before the shaft mounting step.
  • the speed reduction mechanism when the rotary shaft is rotatably attached to the housing, the speed reduction mechanism is not assembled to the rotary shaft. An operator can perform the assembling work while sufficiently viewing the mounting position of the rotating shaft with respect to the housing. For this reason, since assembly
  • the inner ring of the bearing is fitted into a fixed position of the rotating shaft, and then the rotating shaft and the bearing are inserted into the housing and arranged at the fixed position inside. Secure to the housing. After each of these steps, the speed reduction mechanism is assembled to the rotating shaft. For this reason, when the rotating shaft and the bearing fitted to the rotating shaft are arranged at a fixed position of the housing, and the outer ring of the bearing is fixed to the housing with a bearing fixing member, a reduction mechanism is assembled to the rotating shaft. Absent. When attaching the rotating shaft, the bearing, and the bearing fixing member to the housing, the operator can perform the assembling work while sufficiently viewing these members and the mounting position. Therefore, the assembling work can be performed easily and quickly, so that workability can be improved. As a result, the productivity of the electric power steering device can be increased.
  • the bearing fixing member arranged so as to be adjacent to the end face facing the upper opening direction of the housing in the outer ring of the bearing is assembled to the housing.
  • the outer ring of the bearing is fixed to the housing.
  • the operator can assemble the bearing fixing member to the housing while sufficiently viewing the bearing fixing member from the opening side of the housing. Therefore, the assembly work of the bearing by the bearing fixing member with respect to the housing can be performed easily and quickly.
  • the bearing fixing member can be easily assembled to the housing simply by fitting the bearing fixing member to the fitting portion formed in the housing.
  • the lock nut can be easily assembled to the housing simply by screwing the lock nut into the female screw formed in the housing.
  • the steering torque sensor is a magnetostrictive torque sensor, and the magnetostrictive portion is provided on the rotating shaft before the shaft mounting step.
  • the outer diameter of the magnetostrictive part is very close to the diameter of the rotating shaft. For this reason, the hole diameter of the part of the speed reduction mechanism assembled to the rotating shaft may be slightly larger than the diameter of the rotating shaft. For this reason, the diameter of the part where the components of the speed reduction mechanism are assembled on the rotating shaft may be slightly larger than the diameter of the other part. Therefore, the material for manufacturing the rotating shaft can be thin. This reduces the amount of material used. Productivity is improved.
  • the components of the speed reduction mechanism can be inserted into the housing from the direction in which the rotating shaft is inserted into the housing, and assembled at a fixed position of the rotating shaft.
  • the shaft mounting step and the speed reduction mechanism assembling step can be performed from the same direction of the housing. As a result, the productivity of the electric power steering device can be further enhanced.
  • FIG. 1 is a schematic diagram of an electric power steering apparatus according to Embodiment 1 of the present invention. It is a block diagram of the electric power steering apparatus shown by FIG.
  • FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG.
  • FIG. It is the figure which showed the back
  • FIG. 6 is a configuration diagram of a rotating shaft according to Embodiment 2.
  • FIG. It is the figure which showed the front
  • FIG. It is the figure which showed the back
  • FIG. 1 schematically shows an electric power steering apparatus 10 according to the first embodiment.
  • the electric power steering apparatus 10 includes a steering system 20 that extends from a steering wheel 21 of a vehicle to steering wheels (front wheels) 29 and 29 of the vehicle, and an auxiliary torque mechanism 40 that applies auxiliary torque, that is, additional torque, to the steering system 20. .
  • the steering system 20 is connected to a steering wheel 21 via a steering shaft 22 and universal shaft joints 23 and 23, and a rotating shaft 24 (also referred to as a pinion shaft or input shaft) is connected to the rotating shaft 24 via a rack and pinion mechanism 25.
  • the rack shaft 26 is connected, and left and right steering wheels 29 and 29 are connected to both ends of the rack shaft 26 via left and right tie rods 27 and 27 and knuckle 28 and 28, respectively.
  • the rack and pinion mechanism 25 includes a pinion 31 provided on the rotating shaft 24 and a rack 32 provided on the rack shaft 26.
  • the steering wheels 29 and 29 can be steered via the rack and pinion mechanism 25 by the steering torque.
  • the auxiliary torque mechanism 40 detects the steering torque of the steering system 20 applied to the steering wheel 21 by the steering torque sensor 41, generates a control signal by the control unit 42 based on this detection signal, and converts the steering torque to the steering torque based on this control signal.
  • a corresponding auxiliary torque (additional torque) is generated by the electric motor 43, the auxiliary torque is transmitted to the rotating shaft 24 via the speed reduction mechanism 44, and the auxiliary torque is further transmitted from the rotating shaft 24 to the rack and pinion mechanism 25 of the steering system 20. To communicate.
  • the electric motor 43 is composed of a brushless motor, for example, and incorporates a rotation sensor such as a resolver. This rotation sensor detects the rotation angle of the rotor in the electric motor 43.
  • the control unit 42 includes a power supply circuit, a current sensor that detects a motor current, an input interface circuit, a microprocessor, an output interface circuit, an FET bridge circuit, and the like.
  • the input interface circuit takes in a torque signal, a vehicle speed signal, a motor rotation signal, and the like from the outside.
  • the microprocessor performs vector control of the electric motor 43 based on a torque signal, a vehicle speed signal, and the like captured by the input interface circuit.
  • the output interface circuit converts the output signal of the microprocessor into a drive signal to the FET bridge circuit.
  • the FET bridge circuit is a switching element that supplies a three-phase alternating current to the electric motor 43 (brushless motor).
  • the control unit 42 performs vector control based on the rotation signal of the rotor of the electric motor 43 detected by the rotation sensor and the current signal detected by the motor current sensor (built in the control unit 42). This vector control is dq control, and direct current control is performed on the q-axis current for controlling the torque of the electric motor 43 and the d-axis current for controlling the field.
  • control unit 42 determines the target q based on the steering torque signal detected by the steering torque sensor 41, the vehicle speed signal detected by the vehicle speed sensor (not shown), the rotor rotation signal detected by the rotation sensor, and the like. Set the axis current and the target d-axis current. Then, the control unit 42 uses the rotation signal detected by the rotation sensor and the current signal detected by the motor current sensor to convert the real q-axis current and the real d-axis current, which have been dq converted, into the aforementioned PI control is performed so as to match the target q-axis current and the target d-axis current.
  • the steering wheels 29 and 29 can be steered by the rack shaft 26 by a combined torque obtained by adding the auxiliary torque (additional torque) of the electric motor 43 to the steering torque of the driver.
  • the speed reduction mechanism 44 is constituted by a worm gear mechanism, for example.
  • the speed reduction mechanism 44 will be referred to as “worm gear mechanism 44” as appropriate.
  • FIG. 2 shows the overall configuration of the electric power steering apparatus according to the first embodiment, in which the left end and the right end are broken.
  • the rack shaft 26 is accommodated in a housing 51 extending in the vehicle width direction (left-right direction in FIG. 2) so as to be slidable in the axial direction.
  • Tie rods 27 and 27 are connected to the rack shaft 26 via ball joints 52 and 52 at both ends in the longitudinal direction protruding from the housing 51. Both end portions of the rack shaft 26 are covered with dust seal boots 53 and 53.
  • the housing 51 houses the lower half of the rotary shaft 24, the rack and pinion mechanism 25, and the worm gear mechanism 44, and an intermediate fixing member 54 in an upper opening 51a formed at the upper end.
  • a sensor housing 55 is attached to the sensor housing 55.
  • the housing 51 is closed on the opposite side to the upper opening 51a, that is, at the bottom.
  • the rotating shaft 24 is positioned so as to stand up in the housing 51, and the first shaft 24 a (lower end surface) is directed to the other end 24 b (upper end surface).
  • the two magnetostrictive portions 81 and 82 in the bearing 61, the pinion 31, the second bearing 62, and the magnetostrictive torque sensor 41 are provided in this order.
  • the upper half When the rotary shaft 24 is attached to the inside of the housing 51, the upper half extends upward from the upper opening 51a through the sensor housing 55.
  • the two magnetostrictive portions 81 and 82 are located in the sensor housing 55.
  • the housing 51 supports the rotary shaft 24 on the inner peripheral surface through a first bearing 61 and a second bearing 62 so as to be rotatable.
  • the 1st bearing 61 consists of rolling bearings, such as a needle bearing, for example.
  • the second bearing 62 is a rolling bearing such as a ball bearing. That is, the lower end portion of the rotating shaft 24 is rotatably supported by the housing 51 via the first bearing 61.
  • a position between the pinion 31 and the worm wheel 47 is rotatably supported by the housing 51 via the second bearing 62 in the intermediate portion of the rotating shaft 24.
  • the rotary shaft 24 can move in the axial direction with respect to the first bearing 61 housed in the housing 51.
  • CL is the center line (axial center) of the rotating shaft 24.
  • the intermediate fixing member 54 is a hollow flat plate-shaped member for positioning the sensor housing 55 with respect to the housing 51.
  • the sensor housing 55 accommodates the steering torque sensor 41, and includes a cylindrical main body 55a through which the rotary shaft 24 passes vertically and a flat flange 55b formed at the lower end of the main body 55a.
  • An oil seal 56 for sealing the rotating shaft 24 is provided on the upper portion of the main body 55a.
  • the intermediate fixing member 54 is attached by a bolt 57 so as to overlap the flange 51 b in the upper opening 51 a of the housing 51.
  • the movement of the intermediate fixing member 54 in the radial direction is restricted with respect to the housing 51.
  • the flange 55 b of the sensor housing 55 is attached to the upper end surface of the intermediate fixing member 54 with a bolt 58.
  • the sensor housing 55 is restricted from moving in the radial direction with respect to the intermediate fixing member 54.
  • a motor shaft (not shown) extends horizontally in the housing 51 from the front side to the back side of the paper.
  • the motor shaft is an output shaft connected to the worm shaft 45 of the worm gear mechanism 44.
  • the worm shaft 45 includes a worm 46 formed integrally. Both ends of the worm shaft 45 are rotatably supported by the housing 51 via bearings.
  • the worm gear mechanism 44 is configured to transmit torque from the worm 46 to the load side via the worm wheel 47 by meshing the driven worm wheel 47 with the drive side worm 46.
  • the housing 51 includes a rack guide 70.
  • the rack guide 70 includes a guide portion 71 that contacts the rack shaft 26 from the opposite side of the rack 32, an adjustment bolt 73 that presses the guide portion 71 through the compression spring 72, and a contact member 74 that slides the back surface of the rack shaft 26. , And a lock nut 75 for positioning the adjusting bolt 73.
  • the steering torque sensor 41 includes a rotating shaft 24, a pair of upper and lower magnetostrictive portions 81 and 82 that are provided on the surface of the rotating shaft 24 and change in magnetostriction characteristics (magnetic characteristics) according to torque, and the magnetostrictive portions 81 and 82.
  • the magnetostrictive torque sensor includes coils 85 and 85 that are arranged in the vicinity and detect magnetostrictive effects generated in the magnetostrictive portions 81 and 82.
  • the steering torque sensor 41 includes a pair of magnetostrictive portions 81 and 82 provided on the rotating shaft 24 and a detection portion 83 provided around the magnetostrictive portions 81 and 82.
  • the magnetostrictive portions 81 and 82 are made of, for example, a magnetostrictive film to which residual strains in opposite directions are given in the longitudinal direction of the rotating shaft 24.
  • the magnetostrictive portions 81 and 82 are appropriately referred to as “magnetostrictive films 81 and 82”.
  • the magnetostrictive films 81 and 82 are films made of a material having a large change in magnetic flux density with respect to a change in strain.
  • the magnetostrictive films 81 and 82 are Ni—Fe alloy films formed on the outer peripheral surface of the rotating shaft 24 by vapor phase plating. is there.
  • the thickness of the alloy film is desirably about 30 to 50 ⁇ m. The thickness of the alloy film may be less than or greater than this.
  • the magnetostriction direction of the second magnetostrictive film 82 is different from the magnetostriction direction of the first magnetostrictive film 81 (having magnetostriction anisotropy).
  • the two magnetostrictive films 81 and 82 are films having a substantially constant width and a constant thickness formed on the outer peripheral surface of the rotating shaft 24 over the entire circumference.
  • the two magnetostrictive films 81 and 82 are arranged with a predetermined interval in the axial longitudinal direction.
  • the Ni—Fe-based alloy film has a tendency to increase the magnetostriction effect when the Ni content is approximately 50% by weight, so that the magnetostriction effect tends to increase. It is preferable to use a material having such a Ni content.
  • a material having such a Ni content For example, as the Ni—Fe-based alloy film, a material containing 50 to 70% by weight of Ni and the remainder being Fe is used.
  • the magnetostrictive films 81 and 82 may be ferromagnetic films, and are not limited to Ni—Fe alloy films.
  • the magnetostrictive films 81 and 82 may be a Co—Fe based alloy film or an Sm—Fe based alloy film.
  • the detecting unit 83 electrically detects the magnetostrictive effect generated in the magnetostrictive films 81 and 82, and outputs the detection signal as a torque detection signal, and is housed in the sensor housing 55.
  • the detection unit 83 includes a pair of upper and lower cylindrical coil bobbins 84 and 84 through which the rotating shaft 24 penetrates, coils 85 and 85 wound around the coil bobbins 84 and 84, coil bobbins 84 and 84, and coils 85 and 85, respectively. It consists of a yoke 86 having magnetism for storage.
  • the coils 85 and 85 are arranged so as to surround the rotating shaft 24.
  • the coil bobbins 84 and 84 and the coils 85 and 85 are surrounded by a yoke 86.
  • the yoke 86 is a magnetic shielding back yoke (coil yoke forming a magnetic path) surrounding the pair of coils 85 and 85, and is made of a magnetic material.
  • the gap between the magnetostrictive films 81 and 82 and the coil bobbins 84 and 84 is set in a range of about 0.5 to 1 mm.
  • the coils 85 and 85 are excited at an appropriate frequency in the range of 1 to 100 kHz, for example, about 10 kHz, and detect the magnetic permeability between the coils 85 and 85 and the magnetostrictive portions 81 and 82 to which anisotropy is imparted. .
  • FIG. 4A shows the rotating shaft 24 shown in FIG.
  • FIG. 4B shows a state in which the first bearing 61, the second bearing 62 and the worm wheel 47 are attached to the rotating shaft 24.
  • a lower bearing hole 51 c positioned at the lowermost part and a second bearing 62 are fitted to the inner peripheral surface of the housing 51 in order to fit the first bearing 61.
  • the stopper adjacent to the axial upper end (the upper end in the vicinity of the second bearing 62) of the intermediate bearing hole 51d is formed.
  • a stepped surface 51du is provided at the lower end in the axial direction of the intermediate bearing hole 51d.
  • the rotating shaft 24 is a solid shaft, and the lower supported portion 24c and the pinion from one end 24a (lower end surface) to the other end 24b (upper end surface) in the longitudinal direction of the shaft.
  • a lower retaining ring fitting groove 24 d, an intermediate supported part 24 e, a wheel mounting part 24 f, an upper retaining ring fitting groove 24 g, a magnetostrictive film arranging part 24 h, and a connecting part 24 i are arranged in this order, and the axis CL is centered As an array.
  • the lower supported portion 24c, the pinion 31, the lower retaining ring fitting groove 24d, the intermediate supported portion 24e, the wheel mounting portion 24f, the upper retaining ring fitting groove 24g, the magnetostrictive film arranging portion 24h, and the connecting portion 24i are all rotated. It is formed integrally with the shaft 24.
  • the lower supported portion 24 c is a portion that is rotatably supported by the first bearing 61 disposed on the lower side of the housing 51.
  • the lower supported portion 24 c is fitted into the inner ring of the first bearing 61, and the outer ring of the first bearing 61 is fitted into the lower bearing hole 51 c of the housing 51.
  • the intermediate supported portion 24e is a portion that is rotatably supported by the second bearing 62 that is disposed at an intermediate position in the vertical direction of the housing 51.
  • the intermediate supported portion 24 e is fitted to the inner ring of the second bearing 62.
  • the outer ring of the second bearing 62 is fitted into the intermediate bearing hole 51 d of the housing 51.
  • the lower end surface of the outer ring of the second bearing 62 is positioned by the step surface 51du at the lower end of the intermediate bearing hole 51d.
  • the lower retaining ring fitting groove 24d is a portion for attaching the first retaining ring 63 for positioning the lower end surface of the inner ring of the second bearing 62 fitted to the intermediate supported portion 24e.
  • the upper end surface of the outer ring of the second bearing 62 is fitted in the retaining ring fitting groove 51e (fitting portion 51e, fitting groove 51e) of the housing 51, and the second retaining ring 64 (bearing fixing member 64). Is positioned by.
  • both ends of the outer ring of the second bearing 62 are positioned and assembled to the housing 51 by being sandwiched between the step surface 51du and the first retaining ring 63.
  • a second retaining ring 64 disposed adjacent to one end (one end on the upper opening 51a side) of the second bearing 62 is assembled to the housing 51, whereby the outer ring of the second bearing 62 is assembled to the housing 51. Can be fixed to.
  • the wheel mounting portion 24f is a portion where the relative rotation of the worm wheel 47 is restricted and attached by fitting, and has a serration 24j for preventing rotation in part.
  • the upper retaining ring fitting groove 24g is a portion for attaching the third retaining ring 65 for positioning the upper end surface of the worm wheel 47 fitted to the wheel mounting portion 24f.
  • the worm wheel 47 is sandwiched between the upper end surface of the inner ring of the second bearing 62 and the third retaining ring 65, so that the relative movement in the axial longitudinal direction is restricted with respect to the rotation shaft 24.
  • the magnetostrictive film arrangement portion 24h is formed in a perfect circular shape (cylindrical shape) in cross section, and first and second magnetostrictive films 81 and 82 are provided on the outer peripheral surface. That is, the rotating shaft 24 has the first and second magnetostrictive films 81 and 82 on the surface.
  • the connecting portion 24i is a shaft end portion connected to the steering wheel 21 via the universal shaft joints 23 and 23 and the steering shaft 22 shown in FIG.
  • the connecting portion 24 i is made of, for example, a serration for connecting the universal shaft joint 23.
  • the first, second, and third retaining rings 63, 64, 65 are, for example, a circlip, a C ring, and a caulking ring.
  • the diameter D2 of the lower supported portion 24c is smaller than the outer diameter D1 of the pinion 31.
  • the diameter D4 of the wheel mounting portion 24f is smaller than the diameter D3 of the intermediate supported portion 24e.
  • the outer diameter D5 of the serration 24j is smaller than the diameter D3 of the intermediate supported portion 24e, and larger than the diameter D4 of the wheel mounting portion 24f.
  • the outer diameter D6 of the magnetostrictive film arrangement part 24h and the magnetostrictive films 81 and 82 is smaller than the diameter D4 of the wheel mounting part 24f.
  • the diameter D7 of the connecting portion 24i is smaller than the diameter D6 of the magnetostrictive films 81 and 82.
  • each diameter is set to a relationship of “D3> D5> D4> D6> D7”. Therefore, the second bearing 62, the worm wheel 47, the first retaining ring 63, and the third retaining ring 65 can be fitted to the rotating shaft 24 from the other end 24b toward the one end 24a. Further, the relationship of “D3> D1> D2” is set.
  • a large-diameter portion (radial convex portion) larger than the diameter D3 is provided between the intermediate supported portion 24e and the serration 24j, that is, in the intermediate supported portion 24e, at the end on the other end 24b side of the rotating shaft 24. It may be provided. In that case, the second bearing 62 is assembled to the intermediate supported portion 24e from the one end 24a side of the rotating shaft 24.
  • a rotating shaft 24 is prepared, and magnetostrictive films 81 and 82 are applied to the rotating shaft 24 by a plating method, a thermal spraying method, a sputtering method, a vapor deposition method, an adhesion method, etc. Process).
  • the magnetostrictive films 81 and 82 are provided on the outer peripheral surface of the rotating shaft 24 with a substantially uniform film thickness with good adhesion.
  • the magnetostrictive film arrangement portions 24h on which the magnetostrictive films 81 and 82 are formed on the rotating shaft 24 are appropriately subjected to alkali cleaning, water washing, acid cleaning, and the like after the machining, so that the magnetostrictive films 81 and 82 with respect to the rotating shaft 24 are provided. Improved adhesion.
  • anisotropy is imparted to the magnetostrictive films 81 and 82 (anisotropy imparting step). That is, while applying an external torque of about 50 to 100 Nm (more or less depending on the requirement) to the magnetostrictive films 81 and 82, for example, about 300 ° C. for several seconds by a heat treatment method such as high frequency induction heating. Heat for several tens of seconds. Then, cool to room temperature. Then, when the applied external torque is released, anisotropy is imparted. That is, an external torque in the direction opposite to the input torque is applied to the magnetostrictive films 81 and 82 from the rotating shaft 24.
  • an external torque of about 50 to 100 Nm (more or less depending on the requirement) to the magnetostrictive films 81 and 82, for example, about 300 ° C. for several seconds by a heat treatment method such as high frequency induction heating. Heat for several tens of seconds. Then, cool to room temperature. Then, when the applied external torque is released,
  • the direction of magnetostriction in the magnetostrictive films 81 and 82 can be accurately and easily tilted in the direction opposite to the direction in which the external torque is applied. That is, the magnetostriction anisotropy between the first magnetostrictive film 81 and the second magnetostrictive film 82 can be set.
  • the process combining the magnetostrictive film enforcement process and the anisotropy imparting process is referred to as a “magnetostrictive part setting process”.
  • the magnetostrictive films 81 and 82 are provided on the rotating shaft 24.
  • the first retaining ring 63 is fitted into the lower retaining ring fitting groove 24d of the rotating shaft 24 and attached (first retaining ring mounting step).
  • the second bearing 62 is inserted into the rotary shaft 24 from the other end 24 b to the position of the first retaining ring 63. Then, the second bearing 62 is attached to the intermediate supported portion 24e by press fitting (second bearing mounting step, bearing setting step). As a result, the second bearing 62 can be fitted and set (assembled) at a fixed position of the rotating shaft 24.
  • the first bearing 61 is attached to the lower bearing hole 51c of the housing 51 by fitting (first bearing mounting step). As a result, the first bearing 61 is disposed at a fixed position of the housing 51. Note that the first bearing mounting step is optional before the first retaining ring mounting step and the second bearing mounting step.
  • the rotary shaft 24 is inserted into the housing 51 from the upper opening 51a from the one end 24a side. Then, the lower supported portion 24c of the rotary shaft 24 is fitted into the inner ring of the first bearing 61, and the second bearing 62 is fitted into the intermediate bearing hole 51d of the housing 51 (shaft mounting step).
  • the rack shaft 26 is assembled to the housing 51 before the shaft mounting process is performed (rack assembly process). For this reason, the shaft mounting step is performed while the pinion 31 is engaged with the rack 26.
  • the step of inserting the rotating shaft 24 and the second bearing 62 into the housing 51 and disposing them at a fixed position inside is referred to as a “shaft setting step”.
  • the second retaining ring 64 is inserted into the housing 51 from the upper opening 51a. Then, the second retaining ring 64 is fitted and attached to the retaining ring fitting groove 51e of the housing 51 (second retaining ring mounting step, bearing fixing step). As a result, the second bearing 62 is positioned with respect to the housing 51.
  • This assembled state is shown in FIG. That is, both ends of the outer ring of the second bearing 62 are positioned and assembled to the housing 51 by being sandwiched between the step surface 51du and the second retaining ring 64. In this way, the outer ring of the second bearing 62 is fixed to the housing 51 by assembling the second retaining ring 64 disposed on one end side of the outer ring of the second bearing 62 to the housing 51.
  • this shaft attaching process is a process of attaching the rotating shaft 24 to the housing 51 in a rotatable manner.
  • the worm wheel 47 is inserted into the rotating shaft 24 from the other end 24b, and the fitting hole of the worm wheel 47 is fitted into the wheel mounting portion 24f, whereby the wheel mounting portion 24f. And the worm wheel 47 are aligned with each other and connected to the serration 24j (wheel mounting step, reduction mechanism assembling step). That is, at least a part 47 of the speed reduction mechanism 44 (FIG. 3) is assembled to the rotating shaft 24. As a result, since the relative rotation of the worm wheel 47 with respect to the rotating shaft 24 is restricted, torque transmission from the worm wheel 47 to the rotating shaft 24 is possible.
  • the speed reduction mechanism assembling step at least a part of the speed reduction mechanism 44 (worm wheel 47) shown in FIG. 3 is inserted into the housing 51 and assembled to the fixed positions 24f and 24j of the rotary shaft 24. be able to.
  • the rotary shaft 24 is positioned with respect to the housing 51 by the second bearing 62, the first, second, and third retaining rings 63, 64, 65 and the worm wheel 47. Movement is restricted. Thus, the rotating shaft 24 is fixed at a fixed position of the housing 51 via the first and second bearings 61 and 62.
  • the worm 46 is inserted into the housing 51, combined with the worm wheel 47, and attached to the housing 51 so as to be rotatable. Then, the electric motor 43 is assembled to the housing 51 and the motor shaft is connected to the worm shaft 45 (deceleration mechanism / motor assembly process).
  • the intermediate fixing member 54 is overlaid on the flange 51b of the housing 51 and attached with bolts 57 (intermediate fixing member assembling step).
  • FIG.6 (b) the upper half of the rotating shaft 24 protrudes upwards from the upper opening 51a.
  • the sensor housing 55 in which the coils 85 and 85 (the detection portion 83 shown in FIG. 3) are assembled in advance is inserted into the rotary shaft 24 from the other end 24b, It is superposed on the fixing member 54 and attached by a bolt 58 (torque sensor assembly process). The result is shown in FIG.
  • the rack guide 70 is assembled to the housing 51 (rack guide assembling step).
  • the tie rods 27, 27 are assembled to both ends of the rack shaft 26, and the periphery thereof is covered with dust seal boots 53, 53 to complete the assembly work (rack shaft end processing step).
  • the intermediate fixing member assembling process, the torque sensor assembling process, the rack guide assembling process, and the rack shaft end processing process may be performed at any stage as long as the third retaining ring mounting process is performed. This is because the rotary shaft 24 is attached to a fixed position of the housing 51 via the first and second bearings 61 and 62 by performing the third retaining ring mounting step.
  • the rack assembly process may be performed after the third retaining ring mounting process.
  • the speed reducing mechanism 44 is not assembled to the rotating shaft 51.
  • An operator can perform the assembling work while sufficiently viewing the mounting position of the rotary shaft 24 with respect to the housing 51. For this reason, since assembly
  • the inner ring of the second bearing 62 is fitted to the fixed position of the rotating shaft 24 (bearing setting process), and then the rotating shaft 24 and the second bearing 62 are inserted into the housing 51. Then, the outer ring of the second bearing 62 is fixed to the housing 51 (bearing fixing step). After each of these steps, the speed reduction mechanism 44 is assembled to the rotating shaft 24 (speed reduction mechanism assembly step).
  • the rotary shaft 24 and the second bearing 62 fitted to the rotary shaft 24 are arranged at fixed positions of the housing 51, and the outer ring of the second bearing 62 is attached to the housing 51 with the bearing fixing member 64 (second When fixed with the retaining ring 64), the speed reduction mechanism 44 is not assembled to the rotating shaft 24.
  • the operator can perform the assembling work while sufficiently checking these members and the mounting position. For this reason, since assembly
  • the outer ring of the second bearing 62 is disposed adjacent to the end surface (upper end surface) facing the opening 51a (upper opening 51a) of the housing 51 in the bearing fixing step.
  • the bearing fixing member 64 is assembled to the housing 51.
  • the outer ring of the second bearing 62 is fixed to the housing 51.
  • the operator can assemble the bearing fixing member 64 to the housing 51 while sufficiently viewing the bearing fixing member 64 from the opening 51a side of the housing 51. Therefore, the assembly work of the second bearing 62 by the bearing fixing member 64 to the housing 51 can be performed easily and quickly.
  • the bearing fixing member 64 can be easily assembled to the housing 51 only by fitting the bearing fixing member 64 to the fitting portion 51 e formed in the housing 51.
  • the bearing fixing member 64 is constituted by a retaining ring.
  • a simple assembling operation is sufficient in which the retaining ring 64 is fitted into the fitting groove 51e formed in the housing 51.
  • the steering torque sensor 41 is a magnetostrictive torque sensor, and the magnetostrictive portions 81 and 82 are provided on the rotary shaft 24 before the bearing setting process.
  • the outer diameter D6 of the magnetostrictive portions 81 and 82 is very close to the diameters D1 to D5 and D7 of the rotating shaft 24.
  • the hole diameter of the part 47 (worm wheel 47) of the speed reduction mechanism 44 that is inserted and assembled to the rotating shaft 24 corresponds to the diameter D4 of the wheel mounting portion 24f and the outer diameter D5 of the serration 24j.
  • the diameter may be slightly larger than 24 diameters D1, D2, D6, and D7.
  • the diameters D4 and D5 are the diameters D1 and D2 of the other portions.
  • D6 and D7 may be slightly larger. Therefore, the material for manufacturing the rotating shaft 24 can be thin. This reduces the amount of material used. Productivity is improved.
  • the component 47 of the speed reduction mechanism 44 is inserted into the housing 51 from the direction (the other end 24b side) in which the rotary shaft 24 and the second bearing 62 are inserted into the housing 51.
  • the rotary shaft 24 can be assembled at the fixed positions 24f and 24j (the wheel mounting portion 24f and the serration 24j).
  • the bearing fixing step and the speed reduction mechanism assembling step can be performed from the same direction of the housing 51. As a result, the productivity of the electric power steering device 10 can be further enhanced.
  • FIG. 7A shows the rotating shaft 24.
  • FIG. 7B shows a state in which the first bearing 61, the second bearing 62 and the worm wheel 47 are attached to the rotating shaft 24.
  • the vehicle steering apparatus 100 according to the second embodiment is characterized in that the second retaining ring 64 shown in FIGS. 3 and 4B is changed to a lock nut 164 shown in FIG.
  • the other configurations are the same as those shown in FIGS. 1 to 4 and will not be described.
  • a female thread 151e is formed on the inner peripheral surface of the housing 51 adjacent to the upper part in the axial direction of the intermediate bearing hole 51d.
  • the female screw 151e is provided in place of the retaining ring fitting groove 51e shown in FIG. 4B, and a lock nut 164 is screwed into the female screw 151e.
  • the internal diameter of the female screw 151e is larger than the diameter of the intermediate bearing hole 51d.
  • the lock nut 164 is an annular member that can penetrate the rotating shaft 24 and has a well-known configuration.
  • the outer peripheral surface of the lock nut 164 has a male screw that can be screwed into the female screw 151e.
  • the upper end surface of the outer ring of the second bearing 62 is positioned by a lock nut 164 (bearing fixing member 164) screwed into the female screw 151e of the housing 51.
  • a lock nut 164 (bearing fixing member 164) screwed into the female screw 151e of the housing 51.
  • the upper and lower end surfaces of the outer ring of the second bearing 62 are positioned and assembled to the housing 51 by being sandwiched between the step surface 51du and the lock nut 164.
  • a lock nut 164 disposed adjacent to the upper end surface of the outer ring of the second bearing 62 (the end surface facing the upper opening 51a shown in FIG. 3) is assembled to the housing 51, whereby the second bearing 62 is assembled.
  • the outer ring can be fixed to the housing 51.
  • a rotating shaft 24 is prepared, and magnetostrictive films 81 and 82 are applied to the rotating shaft 24 (magnetostrictive film enforcement step).
  • the contents of this magnetostrictive film enforcement process are substantially the same as the magnetostrictive film enforcement process described in Example 1 above (see FIG. 5A).
  • anisotropy is imparted to the magnetostrictive films 81 and 82 (anisotropy imparting step).
  • the content of the anisotropy imparting step is substantially the same as the anisotropy imparting step described in Example 1 (see FIG. 5A).
  • a process in which the magnetostrictive film enforcement process and the anisotropy imparting process are combined is referred to as a “magnetostrictive part setting process”.
  • the magnetostrictive films 81 and 82 are provided on the rotating shaft 24.
  • the first retaining ring 63 is fitted into the lower retaining ring fitting groove 24d of the rotating shaft 24 and attached (first retaining ring mounting step).
  • the second bearing 62 is inserted from the other end 24 b of the rotating shaft 24 to the position of the first retaining ring 63. Then, the second bearing 62 is attached to the intermediate supported portion 24e by press fitting (second bearing mounting step, bearing setting step). As a result, the second bearing 62 can be fitted and set (assembled) at a fixed position of the rotating shaft 24.
  • the first bearing 61 is attached to the lower bearing hole 51c of the housing 51 by fitting (first bearing mounting step). As a result, the first bearing 61 is disposed at a fixed position of the housing 51. Note that the first bearing mounting step is optional before the first retaining ring mounting step and the second bearing mounting step.
  • the rotary shaft 24 is inserted from the upper opening 51 a into the housing 51 from the one end 24 a side. Then, the lower supported portion 24c of the rotary shaft 24 is fitted into the inner ring of the first bearing 61, and the second bearing 62 is fitted into the intermediate bearing hole 51d of the housing 51 (shaft mounting step).
  • the rack shaft 26 is assembled to the housing 51 before the shaft mounting process is performed (rack assembly process). For this reason, the shaft mounting step is performed while the pinion 31 is engaged with the rack 26.
  • the step of inserting the rotating shaft 24 and the second bearing 62 into the housing 51 and disposing them at a fixed position inside is referred to as a “shaft setting step”.
  • a lock nut 164 is inserted into the housing 51 through the upper opening 51a. Then, the lock nut 164 is screwed and attached to the female screw 151e of the housing 51 (lock nut mounting step, bearing fixing step). As a result, the second bearing 62 is positioned with respect to the housing 51.
  • This assembled state is shown in FIG. That is, the upper and lower end surfaces of the outer ring of the second bearing 62 are positioned and assembled to the housing 51 by being sandwiched between the step surface 51du and the lock nut 164.
  • the outer ring of the second bearing 62 is fixed to the housing 51 by assembling the lock nut 164 disposed on the upper end surface side of the outer ring of the second bearing 62 to the housing 51.
  • this shaft attaching process is a process of attaching the rotating shaft 24 to the housing 51 in a rotatable manner.
  • the worm wheel 47 is inserted into the rotating shaft 24 from the other end 24b of the rotating shaft 24, and the fitting hole of the worm wheel 47 is fitted into the wheel mounting portion 24f. 24j (wheel mounting process, speed reduction mechanism assembly process).
  • the contents of this wheel mounting process are substantially the same as the wheel mounting process shown in FIG.
  • the rotary shaft 24 is positioned with respect to the housing 51 by the second bearing 62, the first retaining ring 63, the lock nut 164, the third retaining ring 65, and the worm wheel 47. Movement is restricted. Thus, the rotating shaft 24 is fixed at a fixed position of the housing 51 via the first and second bearings 61 and 62.
  • the worm 46 is inserted into the housing 51, combined with the worm wheel 47, and rotatably attached to the housing 51. Then, the electric motor 43 is assembled to the housing 51 and the motor shaft is connected to the worm shaft 45 (deceleration mechanism / motor assembly process).
  • the intermediate fixing member 54 is overlaid on the flange 51b of the housing 51 and attached with bolts 57 (intermediate fixing member assembling step).
  • FIG.9 (b) the upper half of the rotating shaft 24 protrudes upward from the upper opening 51a.
  • the sensor housing 55 in which the coils 85 and 85 (the detection unit 83 shown in FIG. 3) are assembled in advance is moved from the other end 24 b of the rotating shaft 24 to the rotating shaft 24. It is inserted, overlapped with the intermediate fixing member 54, and attached with a bolt 58 (torque sensor assembly process). The result is shown in FIG.
  • the rack guide 70 is assembled to the housing 51 (rack guide assembling step).
  • the tie rods 27, 27 are assembled to both ends of the rack shaft 26, and the periphery thereof is covered with dust seal boots 53, 53 to complete the assembly work (rack shaft end processing step).
  • Example 2 the intermediate retaining member assembling process, the torque sensor assembling process, the rack guide assembling process, and the rack shaft end processing process performed the third retaining ring mounting process as in the above Example 1. It may be carried out at any stage later.
  • the second embodiment similarly to the first embodiment, when the rotary shaft 24 is rotatably attached to the housing 51, that is, when the shaft attaching step is performed, the speed reducing mechanism 44 is not assembled to the rotary shaft 51. An operator can perform the assembling work while sufficiently viewing the mounting position of the rotary shaft 24 with respect to the housing 51. For this reason, since assembly
  • the inner ring of the second bearing 62 is fitted to the fixed position of the rotating shaft 24 (bearing setting process), and then the rotating shaft 24 and the second bearing 62 are fitted. Is inserted into the housing 51 and arranged at a fixed position inside (shaft setting step), and then the outer ring of the second bearing 62 is fixed to the housing 51 (bearing fixing step). After each of these steps, the speed reduction mechanism 44 is assembled to the rotating shaft 24 (speed reduction mechanism assembly step).
  • the rotary shaft 24 and the second bearing 62 fitted to the rotary shaft 24 are arranged at a fixed position of the housing 51, and the outer ring of the second bearing 62 is attached to the housing 51 with the bearing fixing member 164 (lock nut).
  • the speed reduction mechanism 44 is not assembled to the rotary shaft 24.
  • the operator can perform the assembling work while sufficiently checking these members and the mounting positions. For this reason, since assembly
  • the bearing fixing member 164 is disposed adjacent to the upper end surface of the outer ring of the second bearing 62 facing the opening 51a (upper opening 51a) of the housing 51 in the bearing fixing step. Is assembled to the housing 51. As a result, the outer ring of the second bearing 62 is fixed to the housing 51. For this reason, the operator can assemble the bearing fixing member 164 into the housing 51 while sufficiently viewing the bearing fixing member 164 from the opening 51a side of the housing 51. Therefore, the assembly work of the second bearing 62 by the bearing fixing member 164 to the housing 51 can be performed easily and quickly.
  • the bearing fixing member 164 is constituted by a lock nut. A simple assembling operation is sufficient in that the lock nut 164 is fitted into the female screw 151e formed in the housing 51.
  • the operation and effect of having the magnetostrictive portion setting step of providing the magnetostrictive portions 81 and 82 on the rotating shaft 24 before the bearing setting step is the same as that of the first embodiment. .
  • the rotating shaft 24 is not limited to the configuration in which the first retaining ring 63 is attached to the lower retaining ring fitting groove 24d, and is inserted into the rotating shaft 24 from the other end 24b of the rotating shaft 24.
  • the second bearing 62 may be configured to be positioned at the fixed position 24e (intermediate supported portion 24e) of the rotating shaft 24.
  • a configuration may be adopted in which a flange is provided on the outer peripheral surface of the rotating shaft 24.
  • the first bearing 61 and the second bearing 62 are not limited to rolling bearings, and may be sliding bearings.
  • the magnetostrictive portions 81 and 82 are not limited to the magnetostrictive film as long as the magnetic characteristics are changed by the steering torque applied to the rotating shaft 24.
  • the electric power steering apparatus 10 manufactured by the manufacturing method of the present invention is used for the electric motor 43 that generates an auxiliary torque according to the steering torque and transmits the auxiliary torque to the steering system 20 via the speed reducer 44. It is suitable for.
  • SYMBOLS 10 Electric power steering apparatus, 21 ... Steering wheel, 24 ... Rotating shaft, 41 ... Steering torque sensor (magnetostrictive torque sensor), 43 ... Electric motor, 44 ... Deceleration mechanism, 46 ... Worm, 47 ... Worm wheel, 62 ... Bearing (second bearing), 51e ... fitting portion (retaining ring fitting groove, fitting groove), 64 ... bearing fixing member (second retaining ring), 81, 82 ... magnetostrictive portion (magnetostrictive film), 151e ... Female thread, 164 ... Bearing fixing member (lock nut).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

L'invention porte sur un procédé de fabrication d'un dispositif de direction assistée motorisé dans lequel un couple auxiliaire produit par un moteur électrique (43) est ajouté à un arbre de rotation (24) par l'intermédiaire d'un mécanisme de réduction de vitesse (44). Ce procédé de fabrication comprend une opération de montage d'arbre dans lequel l'arbre de rotation (24) est monté de manière rotative dans un boîtier (51) et une opération d'installation de mécanisme de réduction de vitesse dans lequel, après le montage de l'arbre, le mécanisme de réduction de vitesse (44) est monté sur l'arbre de rotation (24).
PCT/JP2010/064600 2009-12-08 2010-08-27 Procédé de fabrication d'un dispositif de direction assistée motorisé WO2011070826A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP10835748.4A EP2511156A4 (fr) 2009-12-08 2010-08-27 Procédé de fabrication d'un dispositif de direction assistée motorisé
US13/514,258 US20120233860A1 (en) 2009-12-08 2010-08-27 Method of manufacturing motorized power steering device
CN2010800460664A CN102574541A (zh) 2009-12-08 2010-08-27 电动动力转向装置的制造方法
JP2011545105A JPWO2011070826A1 (ja) 2009-12-08 2010-08-27 電動パワーステアリング装置の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-278862 2009-12-08
JP2009278862 2009-12-08

Publications (1)

Publication Number Publication Date
WO2011070826A1 true WO2011070826A1 (fr) 2011-06-16

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PCT/JP2010/064600 WO2011070826A1 (fr) 2009-12-08 2010-08-27 Procédé de fabrication d'un dispositif de direction assistée motorisé

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US (1) US20120233860A1 (fr)
EP (1) EP2511156A4 (fr)
JP (1) JPWO2011070826A1 (fr)
CN (1) CN102574541A (fr)
WO (1) WO2011070826A1 (fr)

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DE112013005511T5 (de) * 2012-11-19 2016-01-28 Honda Motor Co., Ltd. Elektrische Servolenkvorrichtung
CN104097688B (zh) * 2014-08-04 2016-04-06 东南大学 一种后轮主动转向装置及其控制系统
JP6411256B2 (ja) * 2015-03-19 2018-10-24 本田技研工業株式会社 磁歪式トルクセンサ及び電動パワーステアリング装置
US20180086364A1 (en) * 2016-09-23 2018-03-29 Mando Corporation Steering column for vehicle
DE102016013272A1 (de) * 2016-11-09 2018-05-09 Thyssenkrupp Ag Verfahren zur vereinfachten Montage eines Zahnstangenlenkgetriebes einer Zahnstangenlenkung
DE102016013269A1 (de) 2016-11-09 2018-05-09 Thyssenkrupp Ag Zahnstangenlenkung für ein Kraftfahrzeug mit Schneckengetriebe
CN110214109A (zh) * 2017-01-20 2019-09-06 日立汽车系统株式会社 动力转向装置
DE102017214523A1 (de) * 2017-08-21 2019-02-21 Robert Bosch Gmbh Lenksysteme für ein Fahrzeug
DE102017217652A1 (de) * 2017-10-05 2019-04-11 Robert Bosch Gmbh Lenkgetriebe und Verfahren zur Montage eines Lenkgetriebes für ein Kraftfahrzeug
DE102017128815A1 (de) * 2017-12-05 2019-06-06 Thyssenkrupp Ag Kompaktes Dual-Pinion-Lenkgetriebe
CN109578554A (zh) * 2018-12-19 2019-04-05 芜湖世特瑞转向系统有限公司 减速器输出轴消隙机构及电动助力转向系统用减速器

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JPH09309447A (ja) 1996-05-21 1997-12-02 Honda Motor Co Ltd 電動パワーステアリング装置及び電動パワーステアリングの組立方法
JPH11105721A (ja) 1997-10-01 1999-04-20 Nippon Seiko Kk 電動パワ−ステアリング装置
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JPH11105721A (ja) 1997-10-01 1999-04-20 Nippon Seiko Kk 電動パワ−ステアリング装置
JP2001213334A (ja) * 2000-02-04 2001-08-07 Unisia Jecs Corp 動力舵取装置及びその組立方法
JP2004132516A (ja) * 2002-10-15 2004-04-30 Unisia Jkc Steering System Co Ltd 軸部材と円筒部材の結合構造及び結合方法
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Also Published As

Publication number Publication date
CN102574541A (zh) 2012-07-11
EP2511156A1 (fr) 2012-10-17
JPWO2011070826A1 (ja) 2013-04-22
EP2511156A4 (fr) 2013-08-14
US20120233860A1 (en) 2012-09-20

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