WO2008053594A1 - Dispositif de commande de puissance - Google Patents

Dispositif de commande de puissance Download PDF

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Publication number
WO2008053594A1
WO2008053594A1 PCT/JP2007/001189 JP2007001189W WO2008053594A1 WO 2008053594 A1 WO2008053594 A1 WO 2008053594A1 JP 2007001189 W JP2007001189 W JP 2007001189W WO 2008053594 A1 WO2008053594 A1 WO 2008053594A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
power steering
steering device
circuit board
base plate
Prior art date
Application number
PCT/JP2007/001189
Other languages
English (en)
Japanese (ja)
Inventor
Masaki Iijima
Tsugio Yokoo
Kazuyuki Shoji
Chikafumi Sugai
Hiroaki Yokoyama
Masahiro Matsui
Original Assignee
Mitsuba 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
Priority claimed from JP2006296469A external-priority patent/JP2008111803A/ja
Priority claimed from JP2006296468A external-priority patent/JP5155550B2/ja
Priority claimed from JP2006296473A external-priority patent/JP2008111806A/ja
Priority claimed from JP2007246999A external-priority patent/JP5184024B2/ja
Application filed by Mitsuba Corporation filed Critical Mitsuba Corporation
Publication of WO2008053594A1 publication Critical patent/WO2008053594A1/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
    • B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
    • B62D5/0406—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box including housing for electronic control unit
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/102—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving magnetostrictive means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
    • G01L5/221—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to steering wheels, e.g. for power assisted steering

Definitions

  • the present invention belongs to the technical field of a power steering apparatus that drives an electric motor to assist the operating force of the tearing wheel based on the operating force acting on the steering wheel.
  • a torsion bar having one end connected to a steering shaft and the other end connected to an output shaft on the electric motor side, and twisting the torsion bar
  • a torque detection sensor constituted by a detection sensor and controlling the driving of an electric motor based on a detection value of the torque detection sensor.
  • a torque detection sensor a coil casing that is externally fitted to a torsion bar, the amount of magnetic flux of which changes as the torsion bar is twisted, and a change in the amount of magnetic flux of the coil is measured.
  • a plate surface of a sensor circuit board is arranged in parallel to an axis of a coil assembly with respect to a coil assembly that is externally fitted to a torsion bar.
  • Patent Document 1 a coil assembly
  • Patent Document 2 arranged in an extending shape in the outer diameter direction of the coil assembly have been proposed.
  • Patent Document 1 Japanese Patent Laid-Open No. 2 0 0 _ 3 5 3 1 9
  • Patent Document 2 WO 2 0 0 4-0 0 9 4 2 4
  • the coil detection sensor includes a power steering device that is integrally attached to a proximal end portion of the steering shaft.
  • the coil assembly is externally fitted to the output shaft for externally fitting the torsion bar in a movement-restricted state
  • the sensor circuit board is a board formed in the housing. It is configured to be fixed to the receiving part. For this reason, since the coil assembly and the sensor circuit board are individually arranged, the assembling work is troublesome, and the winding and the sensor circuit drawn from the coil assembly after each of these members is assembled. A connection work between the circuit board and the board is required. However, the work is difficult and cumbersome, forceful, and cumbersome, and there is a problem that workability is lowered. There are challenges.
  • the present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 detects the rotational torque of the steering shaft and detects the steering shaft.
  • a power steering device that assists the rotation of the cocoon based on the rotation of the electric motor
  • a torsion bar with one end fixed to the steering shaft and the other end fixed to the output shaft on the electric motor side, and an external fit to the torsion bar
  • a sensor circuit board that detects a magnetic change of the coil assembly and a sensor circuit board that detects the magnetic change of the coil assembly.
  • a cylindrical opening of said cover member, a power steering device configured to Sensaasshi one incorporated into sensor circuit base plate substrate is incorporated.
  • the invention according to claim 2 is the power steering device according to claim 1, wherein the sensor assembly is fixed to the housing of the power steering device via a base plate.
  • the base plate includes an extending plate portion that extends in a direction perpendicular to the axial center of the coil assembly, and the sensor circuit board is disposed on the extending plate portion to be coiled. Configured to be located in one outer diameter direction.
  • the invention according to claim 4 is the power steering apparatus according to any one of claims 1 to 3, wherein the base plate has a reinforcing portion formed in the vicinity of the coil assembly disposition site.
  • the invention according to claim 5 is the base plate according to any one of claims 2 to 4, wherein the base plate is mounted with the surface on the sensor circuit board mounting side facing the assembly mounting portion formed in the housing. Power steering device.
  • the sensor circuit board includes an adjustable electronic component, and the base plate has an opening for adjusting the electronic component. It is a power steering device given in any 1 paragraph.
  • the pair of coil units constituting the coil assembly includes a coil pobbin wound with windings in a cylindrical coil yoke, and a pair of pin bodies connected to both ends of the coil are coiled.
  • the coil unit is configured to protrude from the outer periphery of the yoke with a gap in the circumferential direction, and these coil units are displaced in the circumferential direction and stacked in the axial direction, and are embedded in the cover body.
  • the pair of pin bodies protruding in the outer diameter direction from each other has a circumferential gap formed between the pin bodies, and the conductive plate is placed on the sensor circuit board arranged parallel to the protruding direction of the pin bodies.
  • the conductive plate is formed of a pair of leg pieces and a connecting piece for connecting these leg pieces by bending a long plate material into a U shape, one leg piece and the pin body, the other
  • the invention according to claim 9 is the invention according to claim 8, wherein the other leg piece of the conductive plate penetrates the board and protrudes to the surface of the board on which the pin body is disposed, and the protruding end is soldered. This is a power steering device.
  • the pair of coil units constituting the coil assembly is
  • the coil pobin around which the windings are wound is incorporated in a cylindrical coil yoke, and one coil portion of each coil yoke tube portion or the cover integral tube portion protrudes toward the other tube portion side.
  • the material of the cylindrical portion on the side where the cut and raised pieces are formed is formed of a material having higher hardness than the material of the cylindrical portion on the side where the cut and raised pieces are not formed. It is a power steering device as described in above.
  • the cut and raised pieces are formed on the coil yokes of the respective coil units, and the positions of the cut and raised pieces are shifted from each other in the circumferential direction so that the force yokes are integrated.
  • the coil yoke when the cut and raised piece is formed in the coil yoke, the coil yoke is formed to include a cylindrical portion having a predetermined plate thickness, and a predetermined diameter direction of the cylindrical portion is defined as a reference line. Is located on the cylinder outer peripheral surface corresponding to the range between the tangent at the intersection of the reference line and the cylinder inner diameter and the tangent at the intersection of the reference line and the cylinder outer diameter, The power steering apparatus according to any one of claims 10 to 12, wherein the cut and raised pieces are formed based on orthogonal cut and raised directions.
  • the coil assembly has a projecting piece formed to project toward the cylinder length direction at the opening end integrated with the cover so as to freely pass through the mounting hole provided in the base spray bowl,
  • the penetrating end portion of the protruding piece is fixed to the base plate by a caulking means, and the caulking means uses a force caulking tool composed of at least one tooth tip, and the tooth tip is inserted into the penetrating end portion of the protruding piece. Clamping with a predetermined inclination angle with respect to the longitudinal direction of the 14.
  • the invention according to claim 15 is characterized in that the penetrating end portion of the protruding piece is configured to be force-squeezed using a plurality of tooth tips, and the tooth tips are provided in parallel to each other. It is a steering device.
  • the number of parts can be reduced, the assembly work can be performed smoothly and easily, and the connection work between the coil assembly after assembly and the sensor circuit board can be made unnecessary. And improve reliability.
  • the invention of claim 3 can contribute to compactness.
  • adjustment parts can be adjusted from the base plate side, and adjustment work can be easily performed even after the sensor assembly is assembled in the housing.
  • the pin body and the conductive plate can be easily assembled and soldering work can be facilitated.
  • the number of soldering steps can be reduced, which can contribute to cost reduction.
  • the coil unit cover can be integrated. Although the displacement in the circumferential direction can be restricted, the configuration can be simplified and the number of parts can be reduced, so that a highly reliable / warter steering device can be obtained. Stable fixing force to the coil unit cover can be obtained.
  • the fixing force of each coil unit to the cover body can be obtained in the same manner in a stable and non-uniform state.
  • the influence of the coil assembly on the magnetic circuit can be reduced.
  • the backlash of the cover body can be regulated more reliably.
  • FIG. 1 is a schematic perspective view for explaining a mounting state of a power steering device.
  • FIG. 2 is a rear view of the power steering device.
  • FIG. 3 is a cross-sectional view of a power steering device.
  • FIGS. 4 (A) and 4 (B) are a side view of the sensor assembly and an X_X cross-sectional view of FIG. 4 (A), respectively.
  • FIGS. 5 (A) and 5 (B) are a side view of the coil unit and an X_X sectional view of FIG. 5 (A), respectively.
  • Fig.6 are a plan view, side view, and X-X cross section of Fig.6 (B), etc. It is a side view and a bottom view.
  • Fig. 7 (A), (B) and (C) are side views of the base plate, Fig. 7
  • FIG. 6A is a cross-sectional view taken along the line XX in FIG.
  • FIGS. 8 (A), (B), and (C) are a side view of the substrate support, an X_X sectional view of FIG. 8 (A), and a Y_Y sectional view of FIG. 8 (A), respectively.
  • FIGS. 9A and 9B are a side view and a side view of the substrate, respectively.
  • FIG. 10 Fig. 10 (A), (B), (C), (D), (E), (F) are a plan view, a partially sectional front view, a side view, and a second view of the second terminal plate, respectively.
  • FIG. 4 is a plan view, a partial cross-sectional front view, and a side view of a terminal plate.
  • FIG. 11 is an enlarged perspective view of a main part for explaining a connection state between a coil assembly and a sensor circuit board.
  • FIGS. 12 (A) and (B) are a side view and another side view in the process of incorporating the sensor chassis in the second embodiment, respectively.
  • FIG. 13 is a cross-sectional view of a sensor assembly patterned in the third embodiment.
  • FIG. 14 is an operation explanatory view for explaining the laminated state of the coil unit in the fourth embodiment.
  • FIG. 15 is a cross-sectional view of a power steering apparatus in a fifth embodiment.
  • FIGS. 16 (A) and 16 (B) are side views of the sensor chassis according to the fifth embodiment, respectively, and a sectional view taken along the line XX in FIG. 16 (A).
  • FIGS. 17A and 17B are a side view of a coil unit according to the fifth embodiment, respectively, and a cross-sectional view taken along the line XX of FIG. 17A.
  • FIGS. 18 (A), (B), (C), (D), and (E) are a plan view, a side view, and FIG. ) X— X cross section
  • FIGS. 19A and 19B are a side view and a bottom view of FIG. 19A, respectively, illustrating the laminated state of the coil units in the coil assembly of the fifth embodiment.
  • FIGS. 20 (A), (B), and (C) are side views in the process of assembling the sensor assembly of the sixth embodiment, respectively, a cross-sectional view taken along the line XX in FIG. It is.
  • FIGS. 21 (A), (B), and (C) are side views for explaining the caulking state of the sixth embodiment, an enlarged view of the main part, and a view as seen from the arrow X in FIG. 21 (B).
  • FIGS. 21 (A), (B), and (C) are side views for explaining the caulking state of the sixth embodiment, an enlarged view of the main part, and a view as seen from the arrow X in FIG. 21 (B).
  • FIGS. 22 (A) and (B) are side views of the main part for explaining the force-squeezing state in the seventh embodiment, respectively, and are XX cross-sectional views in FIG. 22 (A). .
  • reference numeral 1 denotes a steering wheel (operation handle) that is rotatably provided on a vehicle body.
  • the steering wheel 1 includes a steering wheel.
  • One end (front end) of the shaft (rotating shaft) 2 is connected, and the other end (base end) of the steering shaft 2 is provided with the power steering device 3 in which the present invention is implemented. It has become.
  • the housing H configuring the power steering device 3 is configured by integrating first and second housings 4 and 5 formed in a split shape in the axial direction of the steering shaft 2.
  • first and second housings 4 and 5 are opened in communication with each other so as to be concentric with the axis of the steering shaft 2.
  • These through holes 4 a and 5 a Is supported rotatably by the output shaft 6 force bearings 4 b and 5 b which are linked to the other end of the steering shaft 2 while being supported by the shaft.
  • the steering shaft 2 is freely loosely fitted to a steering column 2a fixed to the vehicle body side, and the other end of the steering column 2a has a housing H (first A mounting bracket 2b for integrally fixing the first and second housings 4, 5) is formed so as to extend toward the outer diameter side.
  • the output shaft 6 is supported in a penetrating manner with respect to the first and second housing through holes 4a and 5a, and the output shaft 6 protrudes from the through hole 4a of the first housing 4.
  • -Relative rotation is allowed in the rotation range in which the other end portion (base end portion) 2c of the steering shaft 2 is set in advance at the end portion (tip portion) 6a, and the rotation is integrally performed when the rotation exceeds the rotation range. It is linked and linked in a state.
  • the output shaft 6 is formed in a cylindrical shape having a cylindrical hole 6b, and a torsion bar 7 constituting a torque detection sensor is loosely fitted in the cylindrical hole 6b.
  • the torsion bar 7 has one end 7 a that is press-fitted into a support hole 2 d recessed in the other end surface of the steering shaft 2, while the other end 7 b is the other end of the output shaft 6. It is fixed integrally to 6 c using fixing pin 7 c. As a result, as described later, when the steering wheel 1 is operated and a rotational operation force is applied to the steering shaft 2, a twist corresponding to the operation force (torque) is generated in the torsion bar 7. Between shaft 2 and output shaft 6. In this case, the relative rotation is set within the predetermined rotation range.
  • a worm wheel storage chamber WR is formed at the abutting portion of the first and second housings 4 and 5, and the warm wheel storage chamber WR has an output shaft.
  • a worm wheel 8 fitted integrally with 6 is rotatably accommodated.
  • the first housing 4 is formed with a worm shaft housing chamber 4 c extending in a direction perpendicular to the output shaft 6, and the worm shaft housing chamber 4 c rotates as the electric motor M is driven.
  • the worm shaft 9 is accommodated, and the worm 9 a and the worm wheel 8 on the outer periphery of the worm shaft 9 are connected to the worm shaft housing chamber 4 c and a predetermined portion in the circumferential direction of the worm wheel housing chamber WR.
  • the base end of the output shaft 6 is linked to a steering gear (steering device) member SG (not shown), and the steering gear is operated as the output shaft 6 rotates to steer the vehicle. Is set to
  • a plurality of output shaft side detection grooves 6 d are formed in the circumferential direction in the vicinity of the tip portion 6 a of the output shaft 6, while the outer periphery of the output shaft side detection groove 6 d
  • a cylindrical sleeve 10 is externally fitted so as to be relatively rotatable, and a front end portion of the sleeve 10 is attached to a base end portion 2c of the steering shaft 2 via an integral fixing means (for example, caulking). It is fixed.
  • the sleeve 10 is provided with a plurality of openings in the circumferential direction so that the steering shaft side detection groove 10a penetrates the cylindrical portion in a predetermined facing state with the output shaft side detection groove 6d. Yes.
  • the steering shaft side detection groove 10 a and the output shaft side detection groove 6 d are set so as to be misaligned.
  • a sensor assembly 11 constituting a torque detection sensor is fixed to the outer periphery of the sleeve 10, and the sensor assembly 11 allows the steering shaft side detection groove 10a to The torque acting on the torsion bar 7 is electrically detected based on the positional deviation (relative rotation between the steering shaft 2 and the output shaft 6) that occurs when facing the output shaft side detection groove 6d.
  • the present invention is implemented in the sensor assembly 11.
  • a coil assembly 12 provided in the sensor assembly 11 is integrally fitted around the outer periphery of the sleeve 10, and the output shaft side detection groove 6 d and the steering shaft side detection groove 10 a are opposed to each other.
  • the first and second coil units 13 and 14 are configured to change the amount of magnetic flux based on the occurrence of positional deviation in the state.
  • These first and second coil units 1 3 and 14 are arranged adjacent to each other in the axial direction of the output shaft 6, and either the first or second coil unit 13 or 14 It is for torque detection between the shaft 6 and the steering shaft 2, and the other coil unit 14 or 1 3 is for preventing false detection accompanying the temperature change of the coil assembly 1 2. Accurate detection by the sensor assembly 1 1 is guaranteed.
  • Each of the first and second coil units 13 and 14 has a shape that is externally fitted to the sleeve 10 and is made of an insulating material. 1 4 a and windings 1 3 b and 1 4 b are wound respectively.
  • the bottomed cylindrical first and second yokes made of a magnetic material (corresponding to the coil yoke of the present invention) It is fitted in 2 2 and 2 3 and covered with first and second yoke covers 1 2 2 a and 2 3 a, and these basic configurations are the same.
  • the first and second coil units 13 and 14 are applied with a predetermined current to the windings 13 b and 14 b to detect the steering shaft side detection groove 10 a and the output shaft side detection.
  • the outer periphery of the yokes 2 2 and 2 3 is provided with the coil pobbins 1 3 a and 14 a force, and the support portions 1 3 c and 14 (extending from the outer periphery of the yokes 2 2 and 2 3 respectively.
  • These support portions 1 3 c and 1 4 c are formed in a protruding state, and each pair of coils connected to the unwinding end and the winding end of each winding 1 3 b and 14 b
  • the first and second pin bodies 1 3 d and 14 d which are the side terminals, are insulative with a predetermined gap in the circumferential direction, and the support parts 1 3 c and 14 c move from the outer diameter side to the outer diameter side. Each is configured to protrude.
  • the first and second coil units 1 3 and 1 4 are adjacent to each other in the axial direction in a state in which the yoke covers _ 2 2 a and 2 3 a are in contact with (opposite) with each other.
  • the first and second pin bodies 1 3 d and 1 4 d are adjacent to each other in the circumferential direction (with a predetermined gap in the circumferential direction). It is set to be accommodated in the hippo unity 1 5.
  • the cover integral 15 is configured as a bottomed cylinder having a ring-shaped bottom piece 15 a and a cylindrical portion 15 b, and the first and second coil units 1 3, 14 are integrated with the cover 1 It is set to be accommodated together with the disc springs 16 in the 5 cylindrical portions 15 b.
  • the cover integral 15 is formed with a notch 15 c formed by notching the cylindrical portion 15 b, and the first and second pin bodies 13 d and 14 d are formed from the notch 15 c. Is set to protrude to the outer diameter side. Further, the cover integrated 15 is formed with a flange portion 15 d extending from the opening edge of the cylindrical portion 15 b to the outer diameter side, and on the outer peripheral edge of the flange portion 15 d, A plurality (three) of mounting claw pieces 15 5 e in the circumferential direction are formed.
  • the coil assembly 1 2 includes the first and second coil units 1 3 and 1, the coil bobbins 1 3 a and 1 4 a, the cylindrical holes, the yokes 2 2 and 2 3, the yoke covers 1 2 2 a and 2 3 a,
  • the through holes formed in the cover-integrated bottom piece 15 a and the disc spring 16 are respectively formed as continuous through holes 12 a that are concentric with the axis of the output shaft 6.
  • [001 7] 1 7 is a rectangular base spray rod for integrating the sensor assembly 1 1, and the base plate 17 is formed of a rectangular metal plate.
  • a through hole 1 7 a having a diameter substantially the same as or slightly larger than the continuous through hole 1 2 a of the coil assembly 1 2 is opened.
  • force shim mounting holes 17b are formed at a plurality of locations (three locations) in the circumferential direction.
  • the coil assembly 12 faces the other side plate surface 17 c of the base plate 17, and the continuous through hole 12 a and the through hole 17 a of the base plate 17 are concentric.
  • the coil assembly 12 is moved by the pressing force of the disc spring 16 between the first and second coil units 13 and 14 and the cover integral bottom piece 15 a and the base plate 17. It is set to be fixed to the base plate 17 in a state in which the output shaft 6 is pressed in the axial direction and positioned in the circumferential direction and the axial direction.
  • the other half of the base plate 17 where the coil assembly 12 is not provided corresponds to the extending plate portion of the present invention, and the other half corresponds to the axis of the coil assembly 12. It is in a state extending in the orthogonal direction.
  • a support body 18 is provided, and the substrate support body 18 is fixed together with a sensor circuit board 19 accommodated in the substrate support body 18 using a screw 18a, whereby a sensor The circuit board 19 is set so as to be positioned in the outer diameter direction of the coil assembly 1 2.
  • the substrate support 18 is fixed by a screw 18 a, and the substrate support 18 is further formed with a locking claw piece 1 8 b protruding to one end side. 1 8 b is set so as to be secured to the claw mounting hole 17 d formed in the base plate 17.
  • the sensor circuit board 19 is in close proximity to the bottom piece 1 8 c of the board support 18.
  • the other side plate surface 1 7 c of the base plate 17 facing through the through hole 18 8 d opened in the bottom piece 1 8 c, the substrate support bottom piece 1 8 c Is arranged in a state having a predetermined gap, and is perpendicular to the axial direction of the first and second coil units 13 and 14, that is, protrudes from the outer periphery of the cover body 15 in the outer diameter direction.
  • the first and second pin bodies 13 3 d and 14 d are parallel to the protruding direction.
  • the first and second terminal plates 24, 25 are each formed by bending a long flat plate material into a U shape so that the plate surfaces face each other, and a pair of leg pieces 24a, 24 b, 25a, 25b, and connecting pieces 24c, 25c that integrally connect the base ends of these leg pieces 24a, 24b, 25a, 25b.
  • These first and second terminal plates 24 and 25 are fixed to the terminal support portion 18 e formed on the substrate support 18 at the stage before the sensor circuit board 19 is disposed.
  • the sensor circuit board 19 is disposed in a state described later after being fixedly disposed through a fixing means such as press-fitting the connecting piece 24 £ ; 25 c into the terminal support portion 1 86. Is set to
  • the protruding positions of the pair of first and second pin bodies 1 3 d and 1 4 d protruding from the cover assembly 15 of the coil assembly 1 2 are such that the first and second coil units 1 3 and 1 4 are shafts. Since they are stacked in the core direction, they are orthogonal to the axis direction (they are parallel to the protruding direction of these first and second pin bodies 13 d and 14 d) from the sensor circuit board 19
  • the first pin body 1 3 d protruding from the first coil unit 1 3 is more sensitive to the sensor circuit than the second pin body 1 4 d protruding from the second coil unit 1 4. Placed near the board 1 9 Yes.
  • the board connection side leg pieces 2 4 b and 25 b corresponding to the other leg pieces of the first and second terminal plates 24 and 25 and connected to the sensor circuit board 19 are plates.
  • the sensor circuit board 19 is formed with through holes 19 a through which the board connection side leg pieces 24 b and 25 b pass, respectively. Then, the sensor circuit board 19 is incorporated into the board support 18 with the first and second terminal plates 2 4 and 2 5 fixed in advance.
  • the board-side leg pieces 2 4 b and 2 5 b Is inserted in a state of penetrating from the one side plate surface 19 b side of the through hole 19 a toward the other side plate surface 19 c side, and the tip ends of the board connection side leg pieces 2 4 b and 25 b (Through end) 2 4 d, 25 d force Forced from the other side plate surface 19 c where the first and second pin bodies 1 3 d, 14 d of the sensor circuit board 19 are disposed It is set to be.
  • first and second terminal plates 2 4 and 25 are coil connection side leg pieces 2 4 a and 2 5 a, respectively, and the first and second pin bodies 1 3 d and 1
  • the connecting part with 4d is formed with a wide plate width, and bent pieces (pin receiving pieces) 2 4 e, 2 5 cut and raised toward the sensor circuit board 19 side in the middle part of the plate width direction e force
  • the first and second pin bodies 1 3 d and 14 d are formed in a state parallel to the protruding direction.
  • the bent pieces 2 4 e and 25 e at the intermediate portion in the width direction, the first and second pin bodies are provided on both sides of the bent pieces 2 4 e and 25 e.
  • Standing pieces 2 4 f and 2 5 f standing up in the protruding direction of 1 3 d and 14 d and in the direction standing upright on the sensor circuit board 19 are formed.
  • the coil assembly 12 includes the sensor circuit board 19, the first terminal, and the second terminal. It is set to be incorporated in the base plate 1 7 in which members such as plates 2 4 and 2 5 are incorporated, and in this incorporation, the four first and second pin bodies 1 3 projecting from the coil assembly 1 2 d, 1 4 d will be incorporated into the first and second terminal plates 2 4, 2 5. In this case, the first and second pin bodies 1 3 d, 1
  • the soldering work is performed on both leg pieces 2 4a, 2 4b, 2 5a, 2 5b of the first and second terminal plates 2 4, 2 5 in this case
  • the base plate 17 is placed in a stable position as a horizontal state, and in this state, on the sensor circuit board 19 side, the penetrating end 2 4 d protruding from the other side plate surface 19 c 2 5 d in the direction from the first and second pin bodies 1 3 d and 1 4 d to the sensor circuit board 19 (the direction to the one side is the axial direction, perpendicular to the sensor circuit board 19 Direction), the sensor circuit board 19 is connected to the first and second terminal plates 2 4 and 2 5 by soldering to the other side of the sensor circuit board 1 9 c. .
  • the projections of the first and second pin bodies 1 3 d and 14 d are maintained in the state described above.
  • the pin receiving pieces 2 4 e and 2 5 e that are opposed to each other with the long section facing the sensor circuit board 19 from the first and second pin bodies 1 3 d and 1 4 d side (axis core Direction, the direction orthogonal to the sensor circuit board 1 9), the connection between the first and second pin bodies 1 3d and 1 4d and the first and second terminal plates 2 4 and 2 5 It is configured to be made.
  • the first and second pin bodies 1 3 d and 1 4 d are between the first and second pin bodies 1 3 d and 1 4 d that are adjacent to each other in the circumferential direction. Each gap is formed and dispersed in the circumferential direction. Because of this 1st and 2nd pin bodies 1 3d and 1 4d are soldered from the axial direction to facilitate the soldering work, and the insulation of each soldering part is easily secured. Has been.
  • the first and second pin bodies 1 3 d and 1 4 d are made to face the pin receiving pieces 2 4 e and 25 e by making the first and second pin bodies 1 3 d and 1 4 d face each other.
  • the facing area between d and the first and second terminal plates 24 and 25 is large, and not only the connection by soldering is ensured, but also the axial core that is orthogonal to the sensor circuit board 19 When it is carried out from the direction, it is possible to receive the solder eluted by the pin receiving pieces 24 e, 25 e, so that the first and second pin bodies 1 3 d, 1 4 d and the first, second terminal plates 24, 25
  • the shape of the solder that elutes between the two can be made stable so that electrical connection is ensured and the amount of solder supplied can be made constant.
  • the standing pieces 24 f and 25 f are arranged opposite to each other on both sides of the first and second pin bodies 1 3 d and 1 4 d in the circumferential direction, the first and second pin bodies 1 3d and 14d are restricted in the movement direction in the circumferential direction, so that it is possible to prevent problems such as damage to the soldered connection.
  • both the sensor circuit board 19 side and the first and second pin bodies 13d and 14d side Soldering at each part can be performed from the same direction from the other side to one side in the axial direction, and the soldering process can be performed as a single process. It is configured so that the connection by attachment can be in a reliable connection state.
  • the first and second pin bodies 1 3 d and 1 4 d are connected to the other plate surface 1 of the sensor circuit board 1 9 via the first and second terminal plates 24 and 25.
  • Reference numeral 20 denotes a hood that covers the protruding portions of the first and second pin bodies 13 3d and 14d and the sensor circuit board base 19.
  • the sensor assembly 11 configured as described above is provided with a sensor circuit for the concave assembly mounting portion 4d formed on one end side of the worm wheel chamber WR of the housing H (first housing 4). It is set to be assembled from the end of the housing H with the board 19 facing each other. Then, the communication through hole 12a and the base plate through hole 17a formed in the coil assembly 12 are placed on the outer periphery of the sleeve 10 that is fitted to the outer periphery of the output shaft 6 so as to be relatively rotatable. In addition, it penetrates in a concentric state, and is screwed into the assembly attachment portion 4d using the attachment screws 17f inserted from the fixing attachment holes 17 7e opened on the outer edge of the base plate 17.
  • the sensor assembly 1 1 is fixed to the housing H integrally.
  • the coil assembly 1 2 and the sensor circuit board 19 can be attached to the housing H by one assembling operation, and the coil assembly 1 2 and the sensor circuit board 1 can be attached. It is configured so that it can be installed in a state where it is connected to 9. In addition, it is configured so that only the sensor assembly 11 can be easily replaced during maintenance.
  • the sensor assembly 11 is assembled so that the base plate 17 faces the one end side that is the steering shaft 2 side, whereby the electronic component 19 d is arranged.
  • One end of the sensor circuit board 19 is covered with the base plate 17 and the other end is covered with the assembly mounting portion 4d of the housing H.
  • the circuit board 19 is configured to be protected.
  • the sensor circuit board 19 is arranged so as to extend in the outer diameter direction of the coil assembly 12 with respect to the arrangement site of the coil assembly 12. As a result, a long space in the axial direction is secured at the connecting portion between the steering shaft 2 and the output shaft 6 as in the case where a conventional sensor circuit board is provided long in the axial direction. It is configured so that both the coil assembly 1 2 and the sensor circuit board 19 can be provided if only the space necessary for installing the coil assembly 1 2 is secured. .
  • the shaft core of the coil assembly 1 2 (first and second coil units 1 3 and 1 4), the output shaft 6, the steering shaft 2 It is necessary that the positional relationship between the shaft of the sleeve 7 and the sleeve 10 is accurately concentric.
  • the coil assembly 12 of the present embodiment is not directly fixed to the housing H, but is configured to fix what is supported on the base plate 17 to the housing H. Therefore, the coil assembly 1 2 It is assumed that the axial misalignment of the coil assembly 1 2 is likely to occur when some load acts on the plate 1 17.
  • 7 h is formed in a ring shape with a predetermined gap.
  • the bead 17 h is formed substantially concentrically with the formation position of the caulking attachment hole 17 b where the cover assembly 15 of the coil assembly 12 is fixed by caulking. Therefore, the bead 17 h is set so as to reinforce effectively when the coil assembly 12 is caulked to the base spray 17.
  • the power steering device 3 can realize a smooth operation of the steering wheel 1.
  • the steering shaft 2 and the output shaft 6 of the power steering device 3 In order to detect the relative rotation of the coil assembly, a coil assembly 1 2 composed of a pair of first and second coil units 1 3 and 1 4 and a cover body 15, and a winding 1 3 of the coil assembly 1 2 b, 1 4 b
  • the sensor circuit board 1 9 to which b is connected is incorporated into the power steering device 3 as a sensor assembly _ 1 1, which is one assembly component (assembly), by incorporating it into the base plate 1 7. .
  • the number of parts can be reduced, and the assembling work can be performed smoothly and easily.
  • the coil assembly 1 2 windings 1 3 b and 14 b are connected to the sensor circuit board 19 and the built-in components Since the coil assembly and the sensor circuit board are individually incorporated into the power steering device, it is not necessary to perform the connection work after incorporating them, and the connection work is performed in advance. It is possible to improve workability and reliability. In addition, since only the sensor assembly 11 can be easily replaced during maintenance, it can be used over a long period of time, contributing to lower costs.
  • the sensor assembly 1 1 only has the coil assembly 1 2 fitted on the sleeve 10 and the base plate 1 7 is fixed to the housing H. Since it can be fixed to the housing H by Work can be further facilitated.
  • the output shaft 6 is provided when the sensor assembly 11 is disposed.
  • the space in the axial direction can be reduced, contributing to compactness.
  • a bead 17 h is formed at the coil assembly 12 location of the base plate 17, and the base plate 17 is distorted or deformed. Therefore, it is possible to reduce the problem that the detection accuracy is lowered due to the misalignment between the coil assembly 12 and the output shaft 6, and the sensor assembly 11 having higher reliability can be obtained.
  • the sensor circuit board 19 is based on the opening of the assembly attachment 4d formed in a concave shape. It is assembled with plate 17 covered.
  • the sensor circuit board 1 9 force is placed between the metal assembly mounting part 4d and the metal base plate 17 and measures against contamination of the sensor circuit board 19
  • the sensor circuit board 19 can be protected without specially adopting measures against noise and radio noise, and the number of parts can be reduced.
  • the metal material is fixed in a state of being in direct contact with each other. Can be further reduced.
  • the first and second pin bodies drawn from the first and second coil units 13 and 14 constituting the torque detection sensor (sensor assembly 1) 11 are used.
  • 1 3 d and 14 d are arranged adjacent to each other in the circumferential direction, and when these first and second coil units 1 3 and 14 are stacked, they are displaced in the circumferential direction.
  • the first and second pin bodies 13 3 d and 14 d protruding from the cover integrated body 15 are displaced in the circumferential direction.
  • 1st, 2nd pin body adjacent to 1 A gap is formed between 3d and 14d.
  • the first and second pin bodies 1 3 d and 1 4 d are dispersed in the circumferential direction, and the pin bodies do not overlap with each other in the axial direction as in the prior art.
  • soldering to connect to the two terminal plates 2 4 and 2 5 not only is the soldering work easier, but each 1st and 2nd pin bodies 1 3 d and 1 4 d As a result, it is easy to ensure the insulation of the soldered parts, so that a highly reliable sensor assembly 1 1 can be obtained.
  • the first and second terminal plates 2 4 and 2 5 are each formed in a U-shape, and the first and second terminal plates 2 4 and 2 5 and the first and At the part to be soldered to the second pin body 1 3 d, 14 d, connect the first, second pin body 1 3 d, 14 d to one of the first, second terminal plates 24, 25 Since the coil connection side leg pieces 2 4 a and 2 5 a which are leg pieces 2 4 e and 2 5 e are formed so as to be opposed to the front end surface portions and soldered, the first, The second pin bodies 1 3 d and 14 d can be easily assembled into the first and second terminal plates 2 4 and 2 5.
  • the direction of soldering to the coil connection side legs in 2 4 a and 2 5 a may be the axial direction from the first and second pin bodies 1 3 d and 1 4 d to the sensor circuit board 1 side.
  • soldering work is facilitated and reliable insulation can be realized.
  • the board connection side leg pieces 2 4 b and 2 5 b are arranged so that the through holes 19a of the sensor circuit board 19 are moved from the one side plate surface 19b to the other side plate surface 19.
  • penetrating end 2 4 d, 2 5 d is soldered to the first and second pin bodies 13 3 d, 14 d on the other side plate surface 17 c
  • the sensor circuit board 19 It can be performed in the direction of the perpendicular axis, and soldering at both parts can be performed in one posture of the torque detection sensor 11, which can reduce the number of processes and contribute to cost reduction.
  • the present invention is of course not limited to the above-described embodiment, and may be the second embodiment shown in FIG.
  • a coil assembly 12 configured similarly to the first embodiment is provided in a half portion 27a of the base plate 27, and a coil In the other half 2 7 b of the base plate 2 7 extending in the outer diameter direction of the assembly 1 2, the substrate support 2 8, the sensor circuit board 2 9 being accommodated in the substrate support 2 8
  • These basic configurations are the same as those in the first embodiment.
  • the sensor circuit board 29 is provided with an adjustable electronic component 29a, for example, a trimmer for finely adjusting the capacitance value of the sensor circuit.
  • the substrate support 28 and the base plate 27 are provided with through-holes 2 8a and 2 7c in communication with the electronic component 29a located opposite the location.
  • the electronic component 29a can be viewed from the base plate 27 side through the through holes 28a and 27c.
  • the base plate 27 is exposed to the outside in a state where the sensor assembly _ 26 is assembled in the housing H in the same manner as in the first embodiment.
  • the electronic component 29a can be adjusted from the 27 side through the through hole 27c and the through hole 28a of the substrate support 28.
  • a plurality (three) of adjustable electronic components 29a are provided, but these electronic components 29a are provided in one place.
  • the substrate support 28 and the through holes 28a and 27c opened in the base plate 27 are designed to be as small and as small as possible.
  • the workability of the adjustment work is improved.
  • the base plate 27 may be provided with an integrated cover that covers the through hole 27c so that it can be opened and closed. By doing so, foreign matter can be prevented from entering the sensor circuit board 29 side. It can be surely prevented.
  • FIG. 13 shows the sensor assembly 30 according to the third embodiment.
  • a sensor base 30 is attached by fixing a metal base plate 3 1 to a housing H, and a substrate support 3 2 is fixed to the base plate 3 1.
  • the sensor circuit board 33 is supported on the board support 3 2.
  • the electronic component 3 3 a is fixed to the surface of the sensor circuit board 3 3 on the base plate 3 1 side, and the adjustment part 3 3 b force base plate 3 1 of the electronic component 3 3 a and the substrate support 3 2 It is configured to be exposed to the outside through the through holes 3 1 a and 3 2 a opened in the above.
  • the adjustment part 3 3 b of the adjustment part 3 3 a can be operated via the through holes 3 1 a and 3 2 a. Adjustment work can be performed with good workability, and the sensor circuit board 33 can be protected.
  • a fourth embodiment will be described with reference to FIG. 14.
  • a pair of first and second coil units 3 4, 3 5 constituting the coil unit is described.
  • the built-in state is different from that of the first embodiment.
  • the pin bodies 3 4 a and 3 5 a protruding in the outer diameter direction from the pair of coil units 3 4 and 3 5 are positioned along one end surface in the axial direction of the coil unit, and the pin bodies 3 4 a and 3 5
  • the coil units 3 4 and 3 5 are stacked in a state where the positions of the pins a are shifted in the circumferential direction, the axial positions of the pin bodies 3 4 a and 3 5 a are configured to be the same position. Yes.
  • the coil units 3 4 and 3 5 can be configured in the same manner, and the distances from the substrate side of the pin bodies 3 4 a and 3 5 a are the same. There is an advantage that the same terminal plate can be used.
  • the coil assembly 36 is configured as follows.
  • the fifth embodiment constitutes the same sensor assembly 1 1 as that of the first embodiment.
  • the same members as those of the first embodiment have the same reference numerals. The description here will be omitted.
  • the coil assembly 36 includes a pair of first and second coil units 3 7 and 3 8 These first and second coil units 37, 38 are arranged in a state of being stacked adjacent to each other in the axial direction of the output shaft 6, and any one of the first and second coils
  • One coil unit 3 7 or 3 8 is for torque detection between the output shaft 6 and the steering shaft 2, and the other coil unit 3 8 or 3 7 is an error caused by the temperature change of the coil assembly 1 2. This is for detection prevention. By doing so, accurate detection operation by the torque detection sensor 11 is guaranteed.
  • Each of the first and second coil units 3 7 and 3 8 has a shape that is fitted around the sleeve 10, is made of an insulating material, and is formed in the same shape as each other. , 3 8 a and windings 3 7 b and 3 8 b wound respectively, the bottomed cylindrical first and second yokes (coil yokes) made of magnetic material 3 9, 4 It is fitted in 0 and covered with first and second yoke covers_ 39a and 40a. Further, on the outer peripheral parts of these yokes 39, 40, the support parts 37c, 38c extending from the coil pobbins 37a, 38a protrude from the outer peripheral surfaces of the yokes 39, 40, respectively.
  • the support portions 37 c and 38 c have a pair of first and second ends connected to the unwinding end and the winding end of the windings 37 b and 38 b, respectively.
  • Bi-pin bodies 3 7 d and 3 8 d are provided so as to protrude to the outer diameter side.
  • the yokes 39, 40 are formed in a bottomed cylindrical shape having flat ring-shaped bottom surfaces 39b, 40b, and yoke tube portions 39c, 40c.
  • a plurality of cut and raised pieces 39 d and 40 d are formed in the circumferential direction on the outer peripheral surfaces of the yoke tube portions 39 c and 40 c.
  • the cut and raised pieces 3 9 d and 4 0 01 have four pairs of diametrically opposed outer peripheral surfaces of the yoke tube portions 3 9 c and 40 c. Eight parts are formed in the circumferential direction, and are formed in a shape that is long in the tube length direction and protrudes in the outer diameter direction. Then, these eight cut and raised pieces 39 d and 40 d are respectively pressed against the outer peripheral surfaces of the yoke cylinder portions 39 c and 40 c so as to protrude toward the outer diameter direction. Carving up It is formed by so-called knurl processing, and the formation conditions are set as follows.
  • the first and second reference lines L 1 and L 2 facing the predetermined diameter direction with respect to the yoke bottom pieces 39 b and 4 O b, and the first and second reference lines L 1 and L 2 and the yoke tube portion 3 Inner diameter side tangent at the intersection of inner diameter side edge of 9c, 40c TN 1, TN 2, First and second reference lines L1, L2 and outer edge side edge of yoke tube 39c, 40c
  • the outer diameter side tangents TS 1 and TS 2 are set at the intersection with the cut and raised pieces 39 d and 40 d
  • the inner diameter side tangents TN 1 and TN 2 of the yoke tube portions 39 c and 40 c are It is set so as to be formed in a range corresponding to the radial tangent line TS 1 and TS 2.
  • the cut and raised pieces 39 d and 40 d are arranged in the direction perpendicular to the first and second reference lines L 1 and L 2 in the above range of the outer peripheral surfaces of the yoke cylinder portions 39 c and 40 c. (In the direction of the arrow in FIG. 17 (A)), it is cut and raised so as to protrude from the outer peripheral surface of the yoke tube portions 39c, 40c to the outer diameter side.
  • the first and second reference lines L 1 and L 2 are used, on both sides in the radial direction of each of the first and second reference lines L 1 and L 2, and from both sides in the circumferential direction.
  • the cut and raised pieces 39d, 40d correspond to the space between the inner diameter side tangents T T 1, ⁇ ⁇ 2 and the outer diameter side tangents TS 1, TS 2 of the yoke tube portions 39c, 40c.
  • the load generated during the cutting and raising process by the cutting and raising tool acts so as to follow the plate thickness of the yoke tube portions 39 c and 40 c. Deformation can be prevented, and thereby the influence on the magnetic field generated in the yokes 39 and 40 and the yoke covers 39a and 40a can be reduced.
  • the first and second coil units 37 and 38 thus formed correspond to the yoke covers _ 39a and 40a of the first and second coil units 37 and 38, respectively. Stacked in a state where they are adjacent to each other in the axial direction in contact (opposite) and are displaced in the circumferential direction so that the first and second pin bodies 37d and 38d are adjacent to each other in the circumferential direction
  • the cover body 41 is made of a material having a hardness difference from the material of the yokes 39, 40 of the first and second coil units 37, 38. Used, the material has a hardness lower than that of the yokes 39 and 40.
  • the cover unit 41 has a bottomed cylindrical shape including a ring-shaped bottom piece 4 1 a and a cylindrical portion 4 1 b.
  • the inner diameter of the cylindrical portion 4 1 b is the yoke cylindrical portion 39.
  • the c and 40 c cut-and-raised pieces 39 d and 40 d are set in substantially the same manner as the outer diameter at the portion where the cut and raised pieces 39 d and 40 d are not formed.
  • the cover integrated 41 is basically the same configuration as the cover integrated in the first embodiment, 4 1 c is a notch, 4 1 d is a flange, and 4 1 e is a mounting claw. It is a piece.
  • each of the cut and raised pieces 39d and 40d of the first and second coil units 37 and 38 has a plurality of pairs formed in the radial direction.
  • the first and second coil units 3 7 and 3 8 are formed in the same configuration, but the coil side terminals (pin bodies) 3 7 d and 3 8 d are circumferentially adjacent to each other in the circumferential direction. They are stacked with their positions shifted in the direction.
  • the cut-and-raised pieces 3 9 d and 40 d formed in the yoke tube portions 39 c and 40 c overlap each other in the press-fitting direction due to the displacement in the circumferential direction. There is no.
  • the cut-and-raised piece 3 9d of the first coil unit 3 7 that is press-fitted does not interfere with the biting portion, and the biting portion is formed at different positions on the inner peripheral surface of the cylindrical portion 4 1 b.
  • both the first and second coil units 3 7 and 3 8 can bite into the inner peripheral surface of the cylindrical portion 4 1 b with certainty, and the fixing to the cover integrated 4 1 is ensured. Both are configured so that they can be performed in a stable state without variation.
  • the coil assembly 36 is connected to the open side of the cover 41, that is, the first coil unit 37 is opposed to the other side plate surface 17c of the base plate 17 and is connected through.
  • Hole 1 2 a and base plate 1 7 through-hole 1 7 a are concentric, coil assembly 1 2 is pressed against the outer peripheral edge of base plate through-hole 1 7 a, and cover integral mounting claw piece 1 5 e It is set so that it can be integrated into the base plate 17 by inserting it into the base plate force mounting hole 1 7 b and caulking it.
  • the first and second coil units 37 and 38 are assembled in the cover body 41 in a state where movement in the axial direction and movement in the circumferential direction are restricted. Therefore, as in the first embodiment, the first and second coil units 3 7 and 3 8 are assembled into the base plate 17 without being provided with a pan panel integrally with the cover. This simplifies the configuration and reduces the number of parts.
  • the cover integral 41 is formed of a material whose hardness is lower than the hardness of the material constituting the yokes 39, 40, so that the cover body cylinder portion 41b
  • the cover body cylinder portion 41b There is no problem of deforming the yokes 3 9 and 40 when press-fitting, and the deformation of the cut and raised pieces 3 9 d and 40 d itself can be reduced, so the cut and raised pieces 3 9 d , 40 d
  • the cover integrated cylinder part 4 1 b The biting into the inner peripheral surface is ensured, and the first and second coil units 3 7 and 3 8 have a stable fixing force to the cover integrated 4 1. Can do.
  • the first and second coil units 3 7 and 3 8 are stacked in the axial direction and press-fitted into the cover unit 41, but the first and second coil units 3 7 3 8 and 3 8 are formed in the same configuration, and the pin bodies 3 7 d and 3 8 d are laminated in a state where they are displaced in the circumferential direction. Therefore, the cut and raised pieces 3 of each coil unit 3 7 and 3 8 9 d and 40 d are also misaligned in the circumferential direction.
  • the cut and raised pieces 3 9 d and 40 d of the first and second coil units 3 7 and 3 8 do not interfere with each other in the press-fitting direction, and the first and second coil units 3 7 and 3 8
  • the fixing force to the cover 4 1 can be obtained in a stable and non-uniform state.
  • the cut and raised pieces 3 9 d, 40 d are connected to the inner diameter side tangents TN 1, TN 2 and the outer diameter side tangents TS 1, TS 2 of the yoke cylinder portions 39 c, 40 c. Since it is formed within the range that can be dealt with in a short time, it is possible to prevent a problem that the yoke 39, 40 is deformed by the load generated during the cutting and raising process by the cutting and raising tool, and based on the coil assembly 36. The influence on the magnetic circuit can be reduced. For example, when the torque detection is performed by the coil assembly 36, the detection function can be prevented from being impaired.
  • the cut-and-raised piece may be formed on the inner peripheral surface of the cover, and in this case, the cut-and-raised piece is formed to protrude toward the inner diameter side.
  • the sixth embodiment constitutes the same sensor assembly 11 as that of the first embodiment.
  • the same members as those of the first embodiment have the same reference numerals. The explanation here is omitted.
  • the coil assembly 4 2 of the sixth embodiment has the same basic configuration as the cover integrated in the first embodiment, and includes a bottom piece 4 3 a, a cylindrical part 4 3 b, a notch part 4 3 c, and a flange.
  • the cover integrated body 4 3 provided with the part 4 3 d is configured by accommodating the first and second coil units 1 3 and 1 4 together with the disc spring 16 and the outer peripheral edge of the cover integrated flange section 4 3 d.
  • Projection piece (mounting claw piece) 4 3 e base play Gripping holes 1 7 7
  • the protruding piece 43 e is configured to have a predetermined plate thickness, and the length in the circumferential direction is longer than the plate thickness.
  • the mounting holes 17 b for the force shims of the base plate 17 are formed slightly larger than the outer shape of the protruding pieces 4 3 e, and the protruding pieces 4 3 e are the mounting holes for the force shims.
  • 1 7 b is configured to penetrate in a loose fit.
  • 4 4 is a tooth tip constituting a force-squeezing tool, and in the present embodiment, the tooth tip 44 has a width set longer than the plate thickness of the protruding piece 4 3e.
  • the tooth tip 44 is formed with an inclined surface 44 a cut in an inclined manner from one side surface to the other side surface.
  • the longitudinal direction of the through end 4 3 f L that is, the force squeezing force while pressing the tooth tips 4 4 of the caulking tool against the base plate 1 7 at the two circumferential positions.
  • 4 has a predetermined inclination angle 0 (45 degrees in the present embodiment) with respect to the longitudinal direction L of the penetrating end portion 43f, as shown in FIG.
  • the slanted surfaces 4 4 a are set so that they face each other in the opposite direction (not facing each other).
  • a caulking receiving member (not shown) is abutted and fixed to the flange portion 4 3d of the cover integral 4 3 and the tooth tip 4 4 abutting against the penetrating end 4 3f is connected to the caulking receiving member side. It is configured to force-squeeze the through end 4 3 f by pressing against (one end side). At this time, the through end portion 4 3 f is acted on by a caulking mechanism in the direction perpendicular to the width direction of the tooth tip 4 4 (the arrow direction in FIG. 21 (A)). As shown in FIGS.
  • the first and second recesses 43g and 43h are formed, while the direction perpendicular to the width direction of the tooth tips 44 is formed.
  • the deformed deformed portion 4 3 i is formed, and thus the deformed portion 4 3 i is locked to the hole edge on the inner diameter side at one end in the circumferential direction of the force shim mounting hole 17 b, At the other end in the rotational direction, it is locked to the hole edge on the outer diameter side, and at least It is set so that it can be fixed in a state where it is locked to the edge of the diagonal direction.
  • the coil assembly 42 is configured to be a sensor assembly 11 1 that is fixed in a stable state with no axial misalignment.
  • the bead 17 h formed at the hole edge of the base plate through hole 17 a is substantially the same as the formation position of the force shim mounting hole 17 b where the cover integral 43 of the coil assembly 42 is fixed by caulking. It is located on a concentric circle. Accordingly, the bead 17 h is set so as to effectively reinforce the base plate 17 when the coil assembly 42 is caulked and fixed to the base plate 17.
  • the coil assembly 4 2 can be configured so that there is no axial misalignment with respect to the base plate 1 7, so that a highly reliable sensor assembly 1 1 capable of accurately detecting torque can be obtained. Can be provided.
  • the tooth tips 4 4 are positioned in parallel to each other, and the inclined surfaces 4 4 a do not face each other.
  • the projecting piece 4 3 e (through end 4 3 f) is inclined with respect to the longitudinal direction so that the deformed part 4 3 i is attached to the force shim mounting hole 1 7 b It is ensured that it is locked to both edge edges of the diagonal direction, and it is possible to reliably realize the rattling control.
  • the inclined surface 4 4 a only on one side surface of the tooth tip 4 4, it becomes possible to give direction to the deformation of the through end portion 4 3 f. Since 4 4 a faces the edge side of the diagonal holes of the force shim mounting hole 1 7 b, deformation to the side is promoted, and rattling can be more reliably controlled.
  • the through end projecting from the mounting hole of the projecting piece is caulked with the tooth tip of the caulking tool, and the deformed portion of the through end is at least paired with the mounting hole.
  • the play in the circumferential direction and the radial direction can be restricted.
  • the shape of the tooth tip used as the caulking tool, the number of tooth tips, and the inclination to apply the tooth tip to the penetrating end corresponding to the shape of the tooth tip of the caulking tool, the mounting hole, and the caulking tool The angle can be set as appropriate.
  • FIG. 22 shows a seventh embodiment.
  • the through end portion 46 in the cover integral protruding piece protruding from the mounting hole 45 a of the base spray 45 is Apply a tooth tip 47 that is wider than the plate thickness of the through end portion 46 to the middle portion of the through end portion 46 with an inclination angle of 45 degrees with respect to the longitudinal direction.
  • a concave portion 4 6 a and a deformed portion 4 6 b that engages with the hole edge of the mounting hole 4 5 a are formed in the through end portion 4 6, but even in this case, the tooth tip 4 7
  • the caulking mechanism that is orthogonal to the width direction of the mounting hole is directed in the diagonal direction of the mounting hole 45a, so that the deformed part 46b force is locked in the diagonal direction of the mounting hole 45a, both in the circumferential direction and in the radial direction.
  • the rattling can be controlled, and the coil assembly can be fixed to the base plate without rattling.
  • the present invention is useful in the field of power steering devices, and includes a coil assembly, a pair of coil units, and a bottomed cylindrical shape that externally fits these coil units.
  • the cover opening is assembled into a sensor assembly by incorporating the cylinder opening of the cover body into a base spray bowl with a built-in sensor circuit board, which reduces the number of parts and facilitates assembly work. In addition, it can be easily performed, and the connection work between the coil assembly after mounting and the sensor circuit board can be made unnecessary, so that the reliability can be improved.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention concerne un dispositif de commande de puissance capable d'être assemblé sans à-coups et simplement et ayant une fiabilité élevée. Un dispositif de commande de puissance comprend des moyens de détection de couple ayant une barre de torsion (7) fixée à une extrémité à un arbre de direction (2) et à l'autre extrémité à un arbre de sortie (6) sur le côté moteur électrique (M), un ensemble de bobine (12) ajusté sur la barre de torsion (7) et dont le magnétisme change avec la torsion de la barre de torsion (7), et une plaque de circuit de capteur (19) pour détecter un changement du magnétisme de l'ensemble de bobine (12). Pour fabriquer les moyens de détection de couple, l'ensemble de bobine (12) et la plaque de circuit de capteur (19) sont assemblés à une plaque de base (17) pour former un ensemble de capteur (11), et cela permet à l'ensemble de bobine (12) et à la plaque de circuit de capteur (19) est assemblés en même temps.
PCT/JP2007/001189 2006-10-31 2007-10-31 Dispositif de commande de puissance WO2008053594A1 (fr)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP2006-296470 2006-10-31
JP2006-296473 2006-10-31
JP2006296469A JP2008111803A (ja) 2006-10-31 2006-10-31 トルク検知センサ
JP2006296468A JP5155550B2 (ja) 2006-10-31 2006-10-31 トルク検知センサにおけるカバー体の固定構造
JP2006296470 2006-10-31
JP2006-296469 2006-10-31
JP2006296473A JP2008111806A (ja) 2006-10-31 2006-10-31 トルク検知センサ
JP2006-296468 2006-10-31
JP2007-246999 2007-09-25
JP2007246999A JP5184024B2 (ja) 2006-10-31 2007-09-25 パワーステアリング装置

Publications (1)

Publication Number Publication Date
WO2008053594A1 true WO2008053594A1 (fr) 2008-05-08

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PCT/JP2007/001189 WO2008053594A1 (fr) 2006-10-31 2007-10-31 Dispositif de commande de puissance

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WO (1) WO2008053594A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105612412A (zh) * 2013-11-21 2016-05-25 日本精工株式会社 电动式助力转向装置用力矩测量单元及其组装方法
EP2977736A4 (fr) * 2013-03-19 2016-12-21 Nsk Ltd Dispositif de détection de couple, dispositif de direction assistée électrique et véhicule

Citations (4)

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EP2977736A4 (fr) * 2013-03-19 2016-12-21 Nsk Ltd Dispositif de détection de couple, dispositif de direction assistée électrique et véhicule
CN105612412A (zh) * 2013-11-21 2016-05-25 日本精工株式会社 电动式助力转向装置用力矩测量单元及其组装方法
EP3040698A4 (fr) * 2013-11-21 2016-08-31 Nsk Ltd Unité de mesure de couple pour dispositif de direction assistee électrique et son procédé d'assemblage
US9638595B2 (en) 2013-11-21 2017-05-02 Nsk Ltd. Torque measuring unit for electric power steering device and method of assembling the same

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