WO2005005231A1 - ステアリング装置 - Google Patents
ステアリング装置 Download PDFInfo
- Publication number
- WO2005005231A1 WO2005005231A1 PCT/JP2004/010168 JP2004010168W WO2005005231A1 WO 2005005231 A1 WO2005005231 A1 WO 2005005231A1 JP 2004010168 W JP2004010168 W JP 2004010168W WO 2005005231 A1 WO2005005231 A1 WO 2005005231A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steering
- column
- bracket
- fixed
- electric power
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
- B62D1/195—Yieldable supports for the steering column
Definitions
- the present invention relates to a steering device that drives a steering mechanism in accordance with a steering torque applied to a steering wheel, and further improves the collision performance thereof.
- a so-called power steering device for performing steering assist using an external power source is widely used.
- a vane type hydraulic pump has been used as a power source for a power steering device, and the hydraulic pump has often been driven by an engine.
- this type of power steering system has a large engine drive loss due to the constant drive of the hydraulic pump (several horsepower to ten horsepower at maximum load). It was difficult to adopt, and it was unavoidable that the fuel consumption of vehicles with relatively large displacement could not be ignored.
- EPS Electric Power Steering, hereinafter referred to as EPS
- EPS uses an in-vehicle battery as the power source for the electric motor, so there is no direct engine drive loss, and since the electric motor is started only at the time of steering assist, the decrease in running fuel efficiency can be suppressed. It has features such as extremely easy operation.
- an auxiliary steering torque is generated from the electric motor in accordance with the steering torque applied to the steering wheel, and is reduced by the power transmission mechanism (reduction gear) and transmitted to the output shaft of the steering mechanism. It has become.
- improvements have been made to increase the collar stoke on the steering column axis.
- JP-A-10-338147 and JP-A-2001-334945 disclose a collapsable stroke in order to satisfy the collision performance, which is the biggest problem, as a column-type electric power steering device.
- torque sensors, reduction gears, and electric motors must be installed on the steering column shaft, which is naturally limited and may not hold true.
- Japanese Patent Application Publication No. 2001-513467 (FIGS. 1, 2, and 3) is of a guide type, but has the same drawback as described above in that the collubs are provided on the steering column shaft. Also, the electric motor is fixed to the vehicle side, and the column-type electric power steering retreats to the rear of the vehicle due to deformation of the front of the vehicle at the time of the primary collision. There is a disadvantage that the position of the steering wheel at the time of the primary collision becomes unstable and the collision load tends to fluctuate.
- an electric control unit that controls a column-type electric EPS is housed in a case.
- This EPS case is installed in the vehicle cabin, or the EPS It is attached to the housing by Porto or the like.
- SBW steering device
- a steering device which is called a steer-by-wire system in which the steering wheel and the steering mechanism are not mechanically connected
- a conventional steering device is used.
- a steering system in which the steering side of the steering wheel and the steered side of the wheel are not mechanically connected, the steering direction and the steering amount of the steering wheel are detected by an angle sensor.
- the detection signal is input to the controller, and the turning direction and the turning amount of the wheel are determined in consideration of the vehicle state quantity such as the vehicle speed (lateral acceleration), and the wheel is turned by an electric motor or a hydraulic cylinder. I try to steer.
- the steering reaction force accompanying the steering of the steering wheel is given to the driver, and the detected steering force (motor torque, motor current,
- the steering wheel shaft is equipped with a reaction force generator that returns the steering wheel to the neutral position and generates a reaction force in the direction opposite to the steering direction, based on the rack shaft power and cylinder pressure difference.
- the reaction force generator is composed of an electric motor, a speed reducer, a panel, etc., or a combination thereof, and is provided with a torque sensor for detecting whether the generated reaction force has a desired magnitude and direction.
- a torque sensor for detecting whether the generated reaction force has a desired magnitude and direction.
- Patent No. 3 275 175 discloses a column structure provided with an SBW reaction force device, which includes a reduction gear and a motor, The figure shows a telescopic structure in which an angle sensor and a torque sensor are fixed, and a steering wheel mounting shaft side can move in the axial direction.
- the steering column and the steering actuating mechanism such as the rack and pinion type steering mechanism required by the conventional steering device are connected via a universal joint. It eliminates the need for a connecting shaft to connect Each column must have an angle detector to detect the amount of steering, a reaction force generator, etc., and a plurality of columns to improve the safety of the system. As a result, the column becomes bulkier than there is no simple connecting shaft.
- the column is equipped with devices that were not necessary for conventional steering devices, so on the column shaft where a collision energy absorbing device is installed, which absorbs the impact force generated by the collision between the steering wheel and the occupant during a vehicle collision.
- a collision energy absorbing device is installed, which absorbs the impact force generated by the collision between the steering wheel and the occupant during a vehicle collision.
- the space of the vehicle becomes smaller, and the collision safety is significantly reduced. Disclosure of the invention
- An object of the present invention is to provide a column-type electric power steering device capable of improving the collision performance without reducing the Collabs stroke.
- a moving-side bracket supported by the fixed-side bracket and supporting the column-type electric power steering body
- a guide device formed on at least one of the two brackets for permitting travel of the movable bracket and guiding the movable bracket during a secondary collision; and an impact generating a predetermined resistance when the movable bracket travels.
- a column-type electric power steering device comprising an energy absorption device.
- the column-type electric power steering device is a column-type electric power steering device that drives a steering mechanism in accordance with a steering torque applied to a steering wheel.
- a moving-side bracket supported by the fixed-side bracket and supporting the column-type electric power steering body
- a guide portion for guiding the travel of the moving-side bracket having a track formed on at least one of the two brackets
- a resistance means for causing a predetermined resistance when the movable bracket travels during a vehicle collision.
- an electric motor of the column-type electric power steering body is fixed to the moving-side bracket.
- the moving-side bracket can move forward relative to the vehicle.
- the guide section can regulate a moving space of the electric motor that protrudes in a radial direction with respect to a center line of the column-type electric power steering body.
- the intermediary shaft can be easily extended and contracted by a spline or a selection.
- the guide portion is set to be horizontal to the vehicle, the moving-side bracket is horizontal, and if parallel to the steering column axis, it is parallel. It is preferable that the direction of movement can be set, that is, the movement direction can be freely selected to some extent.
- the column-type electric power steering device in the column-type electric power steering device according to the first aspect, at least a fan-shaped space formed by the fixed-side bracket and the movable-side bracket, It is preferable that the reduction gear, the electric motor, the steering angle sensor 1, the ECU, and the steering lock mechanism are arranged.
- a device for explosive explosive at the time of a collision is provided so as to assist the traveling of the movable bracket by the inertial force of the electric motor.
- the electric motor is arranged coaxially or parallel to the steering column axis.
- the column-type electric power steering apparatus generates an auxiliary steering torque from an electric motor in accordance with a steering torque applied to a steering wheel, and reduces the output of the steering mechanism by decelerating by a gear mechanism.
- a column type electric power steering device that transmits to the shaft,
- a moving-side bracket supported by the fixed-side bracket and supporting the column-type electric power steering body
- a trajectory is formed on at least one of the two brackets so as to act as a guide, and the first means travels along the trajectory on the movable side bracket, and the movable side bracket travels during a vehicle collision. And a second means for tightening the movable bracket and the fixed bracket so as to generate a predetermined resistance when performing.
- the control means for controlling the electric power steering main body is arranged on the fixed side bracket.
- control means or its case is fixed to the fixed side bracket
- the case of the control means is integrally formed with the fixed bracket.
- an electric motor of the column-type electric power steering body is fixed to the moving bracket.
- the steering direction and the steering angle of the steering wheel are detected, the detection signal is input to the controller, and the turning direction of the wheel is determined while considering the vehicle state quantity. And the steering angle is determined, and the wheels are steered based on this.
- a guide rail-type column comprising a fixed bracket fixed to the vehicle body and a movable bracket that moves with respect to the fixed bracket with the movement direction regulated by the guide rail in the event of a collision, .
- a reaction force generator having an electric type, a mechanical type, or both, for generating a torque on a steering wheel shaft through a speed reducer through a motor torque;
- At least one or more rotation angle detectors provided on a steering wheel shaft or a motor shaft to detect a rotation angle of the steering wheel shaft are provided.
- a reaction force detector that detects a reaction force generated by the reaction force generation device is disposed between the reaction force generation device and the steering wheel.
- the column is fixedly supported so as to be able to change the swing angle position with respect to the moving side bracket of the guide rail type column.
- the column is fixedly supported on the movable side bracket of the guide rail type column so that the axial position and the swing angle position can be changed.
- reaction force generator housing and the column housing are integrated.
- reaction force detector housing and the column housing are integrated.
- the guide rail-type bracket portion generates a predetermined sliding load due to the impact of a secondary collision of the occupant with the steering wheel at the time of collision, and absorbs the collision energy. It is preferable that
- the guide rail type bracket portion is configured such that the inertial force generated by the reaction force generating device and the weight of the sensor arranged in the column portion due to the deceleration in the forward direction of the vehicle generated at the time of the primary collision.
- the pin provided between the fixed bracket and the moving bracket breaks and moves forward, increasing the distance between the occupant and the steering wheel.
- FIG. 1 is a vertical sectional view of a guide type column type electric power steering apparatus according to a first embodiment of the present invention.
- FIG. 2 is an enlarged sectional view of a main part of the guide evening column type electric power steering apparatus shown in FIG.
- FIG. 3 is a view taken in the direction of arrow A in FIG.
- FIG. 4 is a sectional view taken along line BB of FIG.
- FIG. 5 is a sectional view taken along the line C-C in FIG.
- FIG. 6 shows a guide-type column-type electric power stay according to a second embodiment of the present invention.
- FIG. 2 is a longitudinal sectional view of the sealing device.
- FIG. 7 is a longitudinal sectional view of a guide-type column-type electric power steering apparatus according to a third embodiment of the present invention.
- FIG. 8 is an enlarged sectional view of a main part of the guide type column type electric power steering device shown in FIG.
- FIG. 9 is a sectional view taken along line BB of FIG.
- FIG. 10 is a plan view of a guide-type column-type electric power steering apparatus according to a fourth embodiment of the present invention.
- FIG. 11 is a partially enlarged sectional view of the guide-type column-type electric power steering device shown in FIG. 10 as viewed from the front.
- FIG. 12 is a front view of the electric power steering apparatus shown in FIG.
- FIG. 13 is a right side view of the electric power steering device shown in FIG.
- FIG. 14 is a left side view of the electric power steering device shown in FIG.
- FIG. 15 is a block diagram of a vehicle steering system according to a fifth embodiment of the present invention.
- FIG. 16 is a longitudinal sectional view of a guide type column steering apparatus according to a sixth embodiment of the present invention.
- FIG. 17 is a view of the arrow III in FIG. 16.
- FIG. 18 is a cross-sectional view taken along the line IV-IV in FIG.
- FIG. 19 is a sectional view taken along line VV of FIG.
- FIG. 20 is a longitudinal sectional view of a guide type column steering apparatus according to a seventh embodiment of the present invention.
- FIG. 21 is a view of the arrow VII in FIG. 20.
- FIG. 22 is a cross-sectional view taken along the line VIII-VIII of FIG.
- FIG. 23 is a cross-sectional view taken along the line IX-IX of FIG.
- FIG. 24 is a longitudinal sectional view of a guide type column steering apparatus according to an eighth embodiment of the present invention.
- FIG. 25 is a view of the arrow XI in FIG. 24.
- FIG. 26 is a cross-sectional view taken along the line XII-XII of FIG.
- FIG. 27 is a cross-sectional view of FIG. 24 taken along the line XIII-XIII.
- FIG. 28 is a longitudinal sectional view of a guide-type column-type electric power steering device showing a modification of the first embodiment of the present invention.
- FIG. 1 is a vertical sectional view of a guide type column type electric power steering apparatus according to a first embodiment of the present invention.
- FIG. 2 is an enlarged sectional view of a main part of the guide type column type electric power steering device shown in FIG.
- FIG. 3 is a view taken in the direction of arrow A in FIG.
- FIG. 4 is a cross-sectional view taken along the line BB of FIG.
- FIG. 5 is a cross-sectional view taken along line CC of FIG.
- a column-type electric power steering body PS is disposed in front of the steering column 20 in the vehicle.
- a steering shaft 21 is rotatably supported on the steering column 20.
- a steering wheel (not shown) is attached to the rear end of the steering shaft 21, and an output shaft 22 is connected to the front side of the steering shaft 21.
- An intermediate shaft 13 is connected to the front side of the output shaft 22 via a universal joint 23.
- a universal joint is connected to the intermediate shaft 13 on the front side of the vehicle.
- a steering gear mechanism (not shown) is connected via 24 etc.
- Inn Yuichi Medium Shaft 13 It consists of a male shaft 13a and a female shaft 13b fitted with splines or serrations, and is configured to be able to freely expand and contract (slide) in the axial direction.
- a base end of a torsion bar 25 is press-fitted and fixed to the front side of the steering shaft 21 serving as an input shaft, and the torsion bar 25 is a hollow output shaft.
- the end of the output shaft 22 is fixed to the end of the output shaft 22 by a fixing pin 26.
- a torque sensor 14, a circuit board, and the like are provided in a portion of the steering column 20 corresponding to the vehicle rear side of the output shaft 22.
- a steering angle sensor 15 is provided at a portion of the steering column 20 corresponding to the front side of the output shaft 22 on the vehicle.
- a worm wheel 28 that is combined with a worm 27 that is a drive shaft of the electric motor 6 is attached to the output shaft 22.
- the column-type electric power steering body PS is provided with a pair of housings 31 and 32 and is firmly fixed to each other by a port 33.
- a telescopic bracket 11 is provided in one housing 32, and a pivot pin 35 is movably inserted in the telescopic adjusting groove 34 formed in the telescopic bracket 11 in parallel with the steering shaft.
- the pivot pin 35 is locked to a tilt pivot bracket 9 provided on the movable bracket 2 to be described later.
- the steering force generated when the driver steers a steering wheel is transmitted to the steering shaft 21, the steering shaft 25, the output shaft 22, and the rack and pinion type steering device. Is transmitted to the steered wheels (not shown).
- the electric motor 6 is mounted on the housings 3 1 and 3 2, and its rotational force is transmitted to the output shaft 22 via a worm 27 and a worm wheel 28 integrated with the motor output shaft. By appropriately controlling the rotation force and the rotation direction of the electric motor 6, an appropriate steering assist torque can be applied to the output shaft 22.
- a tilt bracket 10 is provided at a substantially center of the steering column 20, a tilt bracket 10 is provided.
- the tilt bracket 10 is formed with a tilt adjusting groove 41 extending substantially vertically.
- the tilt bracket 10 is integrally fixed to a moving-side bracket 2 described later.
- a flat tightening portion 20a extending in the axial direction of the steering column 20 is formed with a telescopic adjustment groove 42 extending in parallel with the steering axis direction.
- a tightening bolt 43 is inserted through the tilt adjusting groove 41 of the tilt bracket 10 and the telescopic adjusting groove 42 of the tightening portion 20a.
- Friction members 44 are interposed between the tilt bracket 10 and the tilt bracket 10 and between the tilt bracket and the fastening portion 20a, respectively.
- the distal end of the tightening port 43 passes through the base of the cam mechanism 45 and the operating lever 12 (tilt lever), and the adjusting nut 46 is screwed into the male thread at the distal end. They are tightened together.
- the balance spring 16 is provided between the lower surface of the fixed side bracket 1 and the lower surface of the steering column 20.
- the mounting structure of the column-type electric power steering body p S to the vehicle body is of a guide type, and includes a fixed bracket 1 fixed to the vehicle body. And a movable bracket 2 fitted to the fixed bracket 1 so as to be relatively movable with respect to the fixed bracket 1, and provided to extend substantially in the horizontal direction.
- a guide groove 51 (guide portion) extending in the axial direction (substantially horizontal direction) is formed on the back surface side of the fixed bracket 1.
- a pair of fitting recesses 52 and 52 are formed on both sides of the guide groove 51 (guide portion).
- the fixed bracket 1 has an elongated hole 53 extending in the axial direction.
- the movable bracket 2 has a guided portion 61 movably fitted in the guide groove 51 (guide portion).
- the guided portion 61 is fixed in the elongated hole 53 of the fixed-side bracket 1 with an appropriate number of bolts 4 via the friction stabilizing member 3.
- the friction stabilizing member 3 cooperates with the port 4 to exert a predetermined frictional force, and the port 4 moves through the long hole 53 during the Collabs stroke, and then stops. It works as a stopper that regulates Roke.
- a pair of overhang portions 62, 62 are formed to fit into the pair of fitting recesses 52, 52 of the fixed bracket 1.
- An elastically deformable deformation member 8 is interposed between the fitting concave portion 52 and the overhang portion 62. That is, the deformable members 8, 8 are formed between the pair of overhang portions 62, 62 and the fitting recesses 52, 52, respectively, and are provided in substantially vertical gaps extending in the vehicle front-rear direction. It is inserted with the resistance set for traveling of the moving side bracket 2.
- a track is formed on at least one of the two brackets 1 and 2 so as to act as a guide groove 51 (inside the plan), and the first means on which the moving bracket 2 travels along the track.
- the moving side bracket 2 travels.
- a second means for fixing the movable-side bracket 2 and the fixed-side bracket 1 so as to sometimes generate a predetermined resistance.
- the movable bracket 2 is fastened and fixed to the fixed bracket 1 by the port 4, but may be fixed by resin injection or force crimping instead of the port.
- the tilt pivot bracket 9 to which the column-type electric power steering body PS and the like are mounted and the tilt bracket 10 are integrally fixed below the moving bracket 2 as described above.
- the guide groove 51 (guide portion) can regulate the moving space of the electric motor 6 that is generally easily protruded in the radial direction with respect to the center line of the column-type electric power steering body PS.
- the movable bracket 2 can be set horizontally, and if it is parallel to the steering column shaft 20, it can be set parallel. That is, the moving direction can be freely selected to some extent.
- At least one of a reduction gear consisting of a worm 27 and a worm wheel 28, an electric motor 6, a steering angle sensor 15, an ECU, a steering lock, etc. in a fan-shaped space between the fixed side bracket 1 and the moving side bracket 2 Is placed. That is, as described above, the torque sensor 14 and the worm wheel 28 are provided around the axis of the steering column 20, but the signal extraction portion of the torque sensor 14 and the electric motor are provided.
- the radially extending portion such as 6 is accommodated in a fan-shaped portion formed by the fixed side bracket 1 and the steering column 20.
- the force of the occupant colliding with the steering wheel during the secondary collision of the vehicle is fixed to the fixed bracket 1 by the port 4 via the friction stabilizing member 3. Overcoming the frictional force, shrinking the intermediate shaft 13 and deforming the deformable member 8 to move relative to the front of the vehicle along the guide groove 51 (guide portion), absorbing the impact energy And reduce the impact of occupants To do.
- the Collabs direction can be made substantially horizontal to the vehicle (that is, it can form an angle with the steering column 20), and the electric motor 6 reduces the Collabs stroke. Because it does not occur, it is easy to satisfy the collision performance.
- the column-type electric power steering body PS Since the stroke of the guide groove 51 (guide portion) is regulated by a stopper made of Porto 4, the column-type electric power steering body PS does not come off from the moving bracket 2 without any advance.
- the vehicle can travel on the guide groove of the set guide groove 51 (guide portion) to avoid a moving object from hitting the driver.
- the column-type electric power steering body PS and the moving-side bracket 2 are on the moving side with respect to the vehicle, and the movement is performed by the guide grooves 51 (guiding portions). Since the collision is performed along the road, the collision performance can be improved without reducing the Collabs stroke, and the moving objects can be prevented from hitting the driver.
- FIG. 28 is a longitudinal sectional view of a guide-type column-type electric power steering apparatus showing a modification of the first embodiment.
- the explosive explosive device 100 is provided on the fixed side bracket 1.
- the explosive explosive device includes a housing 102 forming an explosive chamber for accommodating an explosive 101, and a cylinder 103 extending in the axial direction integrally with the housing 102, and a piston 103 is provided in the cylinder 103.
- 105 is provided.
- a cable 107 is connected to the piston 105 at one end. The cable is connected to the column side via a guide pulley 109 attached to an extension (not shown) of the fixed side bracket 1. Connected to the front end of bracket 2 on the vehicle.
- the primary collision is detected by a sensor (not shown) and the explosive 10
- the piston 105 moves to the right in Fig. 28 to pull the cable, and the column side bracket and steering column move to the front of the vehicle.
- FIG. 6 is a longitudinal sectional view of a guide type column type electric power steering apparatus according to a second embodiment of the present invention.
- the drawings showing the cross sections (B-B, C-C) are the same as those shown in FIGS. 4 and 5, and are therefore omitted.
- the electric motor 6 is an offset type in which the electric motor 6 is parallel to the axis of the steering column 20.
- the collision can be performed without reducing the Collabs stroke.
- the performance can be improved, and it is possible to prevent those moving objects from hitting the driver.
- FIG. 7 is a longitudinal sectional view of a guide-type column-type electric power steering apparatus according to a third embodiment of the present invention.
- FIG. 8 is an enlarged sectional view of a main part of the guide-type column-type electric power steering device shown in FIG.
- FIG. 9 is a sectional view taken along the line BB of FIG.
- the cross-sectional view along the line C-C in FIG. 7 is the same as FIG.
- an ECU 17 (electric control means) for controlling the column-type electric power steering body PS is housed in a case 18;
- the ECU case 18 is fixed to the upper surface of the fixed bracket 1 by a port 19 or the like.
- the £ ⁇ 11 case 18 may be integrally formed with the fixed bracket 1.
- the fixed bracket 1 By fixing or integrally forming the ECU case 18 with the port 19, the fixed bracket 1 can also be used as an extremely effective heat sink, and the fixed bracket 1 is attached to the vehicle. The effect is even more so because it is fixed.
- the electric motor 6, which is a heat generating component of the electric power steering body PS, is fixed to the housings 31 and 32 of the electric power steering body PS.
- the performance can be improved, and the output of the electric power steering body PS can be improved compared to the past.
- the ECU 17 can be housed in the fan-shaped space between the fixed bracket 1 and the moving bracket 2 as an arrangement position for the ECU 17, so that the layout can be improved and the electric power steering unit PS can be modularized. can do.
- the fixed-side bracket by fixing the control means or the case of the control means to the fixed-side bracket, or by integrally forming the case, the fixed-side bracket can also be used as an extremely effective heat sink.
- the fixed bracket since the fixed bracket is fixed to both sides of the vehicle, the effect is even more so.
- the electric motor which is a heat-generating component of the electric power steering body
- the heat sink is separated, resulting in improved heat dissipation performance. Yes, compared to conventional The output of the power steering body is improved.
- control means can be stored in the fan-shaped space formed by the fixed-side bracket and the movable-side bracket as an arrangement position, so that the layout can be improved and the electric power steering body can be modularized.
- FIG. 10 is a plan view of a guide-type column-type electric power steering apparatus according to a fourth embodiment of the present invention.
- FIG. 11 is a partially enlarged sectional view of the guide-type column-type electric power steering device shown in FIG. 10 as viewed from the front.
- FIG. 12 is a front view of the electric power steering device shown in FIG. 10, FIG. 13 is a right side view of the same, and FIG. 14 is a left side view of the same.
- a column-type electric power steering body PS is disposed in front of the steering column 20 in the vehicle. I have.
- a steering shaft 21 is rotatably supported on the steering column 20.
- a steering wheel (not shown) is attached to the rear end of the steering shaft 21, and an output shaft 22 is connected to the front side of the steering shaft 21.
- a steering gear (not shown) is connected to the front side of the output shaft 22 via a universal joint (not shown), an intermediate shaft (not shown), and the like.
- a base end of a torsion bar (not shown) is press-fitted and fixed on the front side of the steering shaft 21 serving as an input shaft.
- the torsion bar is provided inside the hollow output shaft 22. It extends and its tip is fixed to the end of the output shaft 22.
- a torque sensor, a circuit board, and the like are provided in a portion of the steering column 20 corresponding to the vehicle rear side of the output shaft 22.
- An ECU 115 is provided at a portion of the steering column 20 corresponding to the front side of the output shaft 22 on the vehicle.
- the output shaft 22 is equipped with a worm wheel (not shown) that is compatible with the worm (not shown) that is the drive shaft of the electric motor 6.
- the steering column 20 is integrally connected at its front end to the gear housings 31 and 32 that house the worm wheel.
- the electric motor 6 is fixedly supported by the gear housings 31 and 32.
- the vehicle body-side bracket for supporting the column-type electric power steering body PS on the vehicle body is composed of an iron upper bracket 402 and an aluminum lower bracket 410.
- the lower bracket 401 has a rectangular top plate portion 401 a extending horizontally around the steering axis above the column, and both side plate portions 401 extending downward from both sides of the top plate portion above both sides of the column. b, 401b, mounting plate portions 401c, 401c extending horizontally from both sides of the both side plate portions, and bent downward at both rear sides of each of the mounting plate portions to be rearward of the vehicle.
- the connecting plate portions 401d and 401d are provided integrally with the extending column therebetween.
- the lower bracket 401 has port holes 401 e and 40 le at the vehicle front end of the mounting plate portions 401 c and 401 c, and bolts (not shown) are formed through these port holes. ) Is attached and fixed to the vehicle body side strength member.
- Both side plate portions 401c, 401c of the lower bracket 401 have integrally downwardly protruding portions 401f.
- the steering column is supported at the front end of the vehicle between the downwardly protruding portions 401f via a port 401g so as to be tiltable about the port.
- the upper bracket 402 has a top plate portion 402 a extending above the steering column 20, and a side plate portion 4 which is bent downward from both sides of the top plate portion and extends to a predetermined distance on both sides of the steering column. 0b and 402b, and a vehicle body mounting portion 402c and 402c extending horizontally from the lower end of the side plate portion. Steer between the two side plate sections of the upper bracket A distance bracket 403 is attached to the outer peripheral surface of the bearing column 20.
- the distance brackets 400 are fixed to both sides of the outer periphery of the steering column 200, and both side portions 400b of the upper bracket 402 extend along the inside of the side plates 402b. a, 403 a and a top plate part integrally connecting these two side parts above the steering column.
- Both side plates 400b, 400b of the upper bracket and both side plates 400a, 403a of the distance bracket 400 overlap on the rear side of the vehicle.
- the steering body PS is supported so as to be able to adjust the tilt and Z or the telescopic position via a known tightening mechanism 4 12 via a pin 4 10 penetrating through.
- the upper bracket 402 is provided at the vehicle front end of the vehicle body mounting plate portions 402c and 402c with the connecting plate portions 401d and 401d which are the vehicle rear ends of the lower bracket.
- elongated holes 402 g and 402 g extending in the axial direction are formed in the body mounting plate portion of the upper bracket, while the connecting plate portion of the lower bracket 401 is formed.
- Port holes are formed in 4 Old and 401 d, and both are ported by ports 4 15 and 4 15 through these holes.
- coating plates 4 16 and 4 16 each having a surface coated with a resin are interposed between the upper bracket and the lower bracket.
- the coating plates 4 16 and 4 16 have a U-shape with a substantially horizontal cross section, with the body mounting plates 40 2 c and 40 2 c sandwiched vertically from the front of the vehicle and open to the rear of the vehicle from the port penetration. It is.
- each capsule 418 consists of an aluminum capsule element 418 a and a resin capsule element 418 b.
- Aluminum capsule element 4 1 8a is the center 4 1 8 d has a hole 418e, is fitted in the hole 402h, and the peripheral flange 418f is in contact with the mounting plate 402c.
- the resin capsule element 4 18 b has a central portion for externally fitting the central portion 4 18 d of the aluminum capsule element 4 18 a and a flange 4 18 h around the central portion, and a peripheral flange portion. 418 h is in contact with the mounting plate 402 c from above.
- the vehicle body-side mounting plate 402c is fixed to the vehicle body strength member by a port (not shown) passing through the hole 418e, and is sandwiched between the flange portions 418f and 418h.
- the shape of the elongated hole for port penetration of the upper bracket 402c and the structure, Z, or specifications of the coating plate members 416, 416 and the capsules 418, 418 With this, the separation load at the time of the secondary collision can be controlled.
- a coating plate may be used instead of the capsules 418 and 418.
- the energy absorption at the time of the secondary collision can be reduced by not only the capsules 4 18 and 4 18 between the vehicle body-side strength member and the upper bracket 4 2, but also the upper bracket 4 2
- the coating plate members 4 16 and 4 16 between the bracket 401 can also be shared, which is advantageous when a large Collabs load is required.
- FIG. 15 is a block diagram of a vehicle steering system according to a fifth embodiment of the present invention.
- the steering side of the steering wheel a and the steered side of the wheel n are separated, and a steering controller e is provided between the two.
- a steering wheel a On the steering side, a steering wheel a, an angle detector b for detecting a steering direction and a steering angle of the steering wheel a, a steering wheel a returning to a neutral position, and a steering wheel a corresponding to the steering angle.
- a reaction force generator d for generating a reaction force is provided.
- a torque detector C for detecting the reaction force generated by the reaction force generator d is provided between the reaction force generator d and the steering wheel a.
- a steered force generating device g that generates a steered force based on an instruction signal from the steering controller e is provided.
- the steering shaft k which converts the turning force into linear motion, is connected to the wheel n via a tie rod m or a knuckle arm.
- a turning load detector h and a turning amount detector i for detecting the actual turning load and the turning amount of the wheel n are provided.
- the steering controller e includes a vehicle state detector ⁇ ⁇ that detects a vehicle speed, a rate, a lateral acceleration, and the like, the angle detector b, the reaction force detector c, and the steering load detector h. And a detection signal from the turning amount detector i.
- the steering controller e determines the steering direction and the steering angle of the wheel n based on the input information on the steering direction and the steering angle, the speed information, the information on the yaw rate, the lateral acceleration, and other factors. This signal is output to the steering force generator g.
- the steering shaft k moves linearly, and the tie rod m and the knuckle arm operate to steer the wheel n.
- FIG. 16 is a longitudinal sectional view of a guide type column steering apparatus according to a sixth embodiment of the present invention.
- FIG. 17 is a view taken in the direction of arrow III in FIG.
- FIG. 18 is a cross-sectional view taken along the line IV-IV in FIG.
- FIG. 19 is a sectional view taken along line VV of FIG.
- a column-type reaction force generator d is arranged at the front of the steering column 20 in the vehicle.
- An angle detector b is arranged adjacent to this, and a torque detector c (between the reaction force generator d and the steering wheel, which detects a reaction force generated by the reaction force generator d ( Reaction force detector).
- a steering shaft 21 is rotatably supported on the steering column 20.
- a steering wheel (not shown) is attached to the rear end of the steering shaft 21, and a reaction shaft is provided on the front side of the vehicle. 5 2 2 are connected.
- the base end of a torsion bar 25 is press-fitted and fixed to the front side of the steering shaft 21 serving as an input shaft.
- the torsion bar 25 extends inside a hollow reaction force shaft 5 22.
- the tip is fixed to the end of the reaction shaft 52 by a fixing pin 26.
- a torque detector c reaction force detector
- a circuit board and the like are provided at a portion of the steering column 20 corresponding to the vehicle rear side of the reaction force axis 5222.
- An angle detector ID and the like are provided in a portion of the steering column 20 corresponding to the front side of the vehicle of the reaction force axis 5222.
- a reaction wheel 522 is fitted with a worm wheel 28 that is compatible with a worm 27 that is a drive shaft of the electric motor 6.
- the column-type reaction force generator d includes a pair of housings 31 and 32, and is firmly fixed to each other by a port 33 or the like.
- a telescopic motion guide bracket 11 is provided integrally with one housing 3 2.
- a pivot pin 35 is freely movable in the telescopic direction in a telescopic adjustment groove 34 formed in the telescopic motion guide bracket 11. As shown in FIG. 17, the pivot pin 35 is provided with a tilde provided on a movable bracket 2 to be described later. Locked to Topipot bracket 9.
- a tilt bracket 10 is provided at a substantially center of the steering column 20 at a substantially center of the steering column 20 at a substantially center of the steering column 20, a tilt bracket 10 is provided.
- the tilt bracket 10 is formed with a tilt adjusting groove 41 extending substantially vertically.
- the tilt bracket 10 is integrally fixed to a moving bracket 2 described later.
- a flat tightening portion 20a extending in the axial direction of the steering column 20 is formed with a telescopic adjustment groove 42 extending in the steering axial direction. is there.
- a tightening port 43 is inserted through the tilt adjusting groove 41 of the tilt bracket 10 and the telescopic adjusting groove 42 of the tightening portion 20a.
- Friction members 44 are interposed between the tilt bracket 10 and the tilt bracket 10 and between the tilt bracket and the fastening portion 20a, respectively.
- the distal end of the tightening port 43 passes through the base of the cam mechanism 45 and the operating lever 12 (tilt lever), and the adjusting nut 46 is screwed into the male thread at the distal end. They are tightened together.
- the balance spring 16 is provided between the lower surface of the fixed bracket described below and the lower surface of the column. This is to prevent it from falling.
- the operation lever 1 2 tilt lever
- the width of the cam mechanism 45 becomes narrow
- the tilt bracket 10 the friction member 44, and the steering column 20 are tightened.
- the mutual pressing of the parts 20a is released, and the tightening to the tilt and no or the telescopic adjustment position is released.
- This allows for tilt and / or telescopic adjustment.
- the column type steering device is mounted on the vehicle body by a guide type, and a fixed bracket 1 that is fixed to the vehicle body side and a fixed side
- a movable bracket 2 fitted to the fixed bracket 1 so as to be relatively movable with respect to the bracket 1 is provided so as to extend substantially in the horizontal direction.
- a guide groove 51 (guide portion) extending in the axial direction (substantially horizontal direction) is formed on the back side of the fixed bracket 1.
- a pair of fitting recesses 52 and 52 are formed on both sides of the guide groove 51 (guide portion).
- the fixed bracket 1 has an elongated hole 53 extending in the axial direction.
- the movable bracket 2 has a guided portion 61 movably fitted in the guide groove 51 (guide portion).
- the guided portion 61 is fixed in the long hole 53 of the fixed bracket 1 by an appropriate number of bolts 4 via the friction stabilizing member 3.
- the friction stabilizing member 3 exerts a predetermined frictional force in cooperation with the port 4, and the porto 4 moves in the slot 53 during the Collabs stroke, and then moves. , And serves as a stopper that regulates the stroke.
- a pair of projecting portions 62, 62 are formed to fit into the pair of fitting recesses 52, 52 of the fixed bracket 1.
- a comb-shaped deformable member 8 that can be deformed in a flexible manner is interposed between the fitting concave portion 52 and the overhang portion 62. That is, in FIG. 18, the deformable members 8, 8 are formed between the pair of overhang portions 62, 62 and the fitting concave portions 52, 52, and are formed into substantially vertical gaps extending in the vehicle longitudinal direction. It is inserted with the set resistance against traveling of the moving side bracket 2.
- the tilt pivot bracket 9 to which the reaction force generating device d and the like are mounted and the tilt bracket 10 are integrally fixed below the movable bracket 2.
- housings 31 and 32 of the reaction force generator d and the steering column 20 are integrated.
- torque detector c reaction detector Housing and steering column 20 (column housing) are integrated.
- the guide rail-type bracket in the event of a collision, the guide rail-type bracket generates a predetermined sliding load due to the impact of a secondary collision of the occupant with the steering wheel to absorb the collision energy. That is, a mechanism that generates a frictional force by pressing both brackets 1 and 2 with bolts 4 via a friction stabilizing member 3 and a comb tooth-shaped deforming member 8 arranged in the moving direction in accordance with the relative movement And a mechanism for generating deformation resistance by being deformed.
- the deformable member 8 is deformed and relatively moves forward of the vehicle along the orbital groove of the guide groove 51 (guide portion).
- the Colubs direction can be substantially horizontal to the vehicle (it can form a certain angle with the steering column 20), and the Colombs stroke can be reduced by using an electric motor 6 or the like. No, it is easy to satisfy the collision performance.
- the column type reaction force generator d may come off from the moving side bracket 2. Instead, the vehicle travels on the guide groove of the guide groove 51 (guide portion) set in advance, and it can be avoided that the moving object hits the driver.
- the column-type reaction force generator d and the moving-side bracket 2 are on the moving side with respect to the vehicle, the movement is performed along the guide groove 51 (guide portion). Therefore, the collision performance can be improved without reducing the Collabs stroke, and it is possible to prevent those moving objects from hitting the driver.
- FIG. 20 is a longitudinal sectional view of a guide type column steering apparatus according to a seventh embodiment of the present invention.
- FIG. 21 is a view taken in the direction of arrow VII in FIG.
- FIG. 22 is a cross-sectional view taken along the line VIII-VIII of FIG.
- FIG. 23 is a cross-sectional view taken along the line IX-IX of FIG.
- the seventh embodiment differs from the sixth embodiment only in the tilt / telescopic adjustment structure, and the other configurations, operations, and effects are the same as those in the sixth embodiment. Therefore, only the differences will be described.
- the column-type reaction force generator d includes a pair of housings 31,
- a bracket 70 is physically provided, and a pivot pin 35 is inserted into the bracket 70.
- the pivot pin 35 is also provided in FIG. 20. As shown, the tilt pivot bracket on the moving bracket 2
- the steering column includes an outer-side lower column 71 and an inner-side upper column 72 slidably fitted thereto.
- a tilt bracket 10 is provided so as to be integrally fixed to the moving-side bracket 2 so as to face the vehicle rear portion of the lower column 71.
- the tilt bracket 10 is formed with a tilt adjusting groove 41 extending substantially in the vertical direction.
- the lower column 71 on the outer side is provided with a pair of clamp portions 73a, 73b formed thick below, and the clamps 73a, 73b are provided.
- the tightening port 43 passes through the tilt grooves of the tilt brackets 10 and 10.
- the cam mechanism 45 and the proximal end of the operating lever 12 (tilt lever) are inserted through the distal end of the tightening port 43, and the adjusting nut 46 is screwed into the male thread at the distal end. It is tightened together.
- a holding portion 7 is provided above the lower column 71, and a stopper 75 is supported by a pin 76 in the holding portion 74. Lower end of this stopper 7 5 The portion engages with a telescopic range groove 77 formed in the upper column 72 to define a telescopic adjustment range during telescopic adjustment.
- the lower column 71 releases the pressing against the upper column 72, and the upper column 72 can be telescopically adjusted.
- FIG. 24 is a longitudinal sectional view of a guide type column steering apparatus according to an eighth embodiment of the present invention.
- FIG. 25 is a view of the arrow XI in FIG. 24.
- FIG. 26 is a cross-sectional view taken along the line XII-XII of FIG.
- FIG. 27 is a cross-sectional view taken along the line XII-XII in FIG.
- the eighth embodiment is different from the sixth embodiment only in the moving structure at the time of a collision, and the other configurations, operations, and effects are the same as those of the sixth embodiment. Therefore, only the differences will be described.
- the mounting structure of the column type steering device to the vehicle body is a guide type, and includes a fixed bracket 1 that is fixed to the vehicle body side and a fixed bracket 1 that is fixed to the vehicle body.
- a movable side bracket 2 fitted to the fixed side bracket 1 so as to be relatively movable is provided to extend in a substantially horizontal direction.
- the back side of the fixed bracket 1 is axially (substantially horizontal).
- a guide groove 51 (guiding portion) is formed to extend to the center.
- a pair of fitting recesses 52, 52 are formed on both sides of the guide groove 51 (guide portion).
- the movable bracket 2 has a guided portion 61 movably fitted in the guide groove 51 (guide portion).
- the guided portion 61 is fixed to the fixed bracket 1 by a plurality of shear pins 80 (fuses).
- Ratchets 81, 81 which are irreversible mechanisms, are interposed between the fitting concave portions 52, 52 and the projecting portions 62, 62.
- the guide rail-type bracket has a predetermined deceleration due to the deceleration in the forward direction of the vehicle, which occurs at the time of the primary collision, due to the reaction force generator d and the heavy objects of the detectors b and c arranged in the column 20.
- the pin 80 fuse
- An irreversible mechanism 8 1 is provided to prevent the vehicle from bouncing back after moving.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering Controls (AREA)
- Power Steering Mechanism (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005511597A JPWO2005005231A1 (ja) | 2003-07-09 | 2004-07-09 | ステアリング装置 |
Applications Claiming Priority (6)
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JP2003-194429 | 2003-07-09 | ||
JP2003194429 | 2003-07-09 | ||
JP2003194425 | 2003-07-09 | ||
JP2003-194425 | 2003-07-09 | ||
JP2003-290564 | 2003-08-08 | ||
JP2003290564 | 2003-08-08 |
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PCT/JP2004/010168 WO2005005231A1 (ja) | 2003-07-09 | 2004-07-09 | ステアリング装置 |
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WO (1) | WO2005005231A1 (ja) |
Cited By (11)
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JP2007062470A (ja) * | 2005-08-30 | 2007-03-15 | Toyoda Gosei Co Ltd | 操舵装置 |
JP2008018803A (ja) * | 2006-07-12 | 2008-01-31 | Nsk Ltd | ステアリング装置 |
JP2009018766A (ja) * | 2007-07-13 | 2009-01-29 | Nsk Ltd | 電動パワーステアリング装置 |
JP2009126440A (ja) * | 2007-11-27 | 2009-06-11 | Nsk Ltd | 車両用ステアリング装置 |
JP2011162106A (ja) * | 2010-02-12 | 2011-08-25 | Nsk Ltd | ステアリング装置 |
DE102010024353A1 (de) * | 2010-06-18 | 2011-12-22 | Thyssenkrupp Presta Ag | Elektrische Servolenkung |
JP2012131302A (ja) * | 2010-12-21 | 2012-07-12 | Nsk Ltd | ステアリングコラム用支持装置及びその組立方法 |
JP2012140051A (ja) * | 2010-12-28 | 2012-07-26 | Nsk Ltd | ステアリングコラム用支持装置 |
JP2012140066A (ja) * | 2010-12-28 | 2012-07-26 | Nsk Ltd | ステアリングコラム用支持装置及びその組立方法 |
EP2684773A2 (en) | 2012-07-09 | 2014-01-15 | Jtekt Corporation | Steering system |
JP2016043797A (ja) * | 2014-08-22 | 2016-04-04 | 本田技研工業株式会社 | 電動パワーステアリング装置 |
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JP2007062470A (ja) * | 2005-08-30 | 2007-03-15 | Toyoda Gosei Co Ltd | 操舵装置 |
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JP2009018766A (ja) * | 2007-07-13 | 2009-01-29 | Nsk Ltd | 電動パワーステアリング装置 |
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JP2012131302A (ja) * | 2010-12-21 | 2012-07-12 | Nsk Ltd | ステアリングコラム用支持装置及びその組立方法 |
JP2012140051A (ja) * | 2010-12-28 | 2012-07-26 | Nsk Ltd | ステアリングコラム用支持装置 |
JP2012140066A (ja) * | 2010-12-28 | 2012-07-26 | Nsk Ltd | ステアリングコラム用支持装置及びその組立方法 |
EP2684773A2 (en) | 2012-07-09 | 2014-01-15 | Jtekt Corporation | Steering system |
CN103538624A (zh) * | 2012-07-09 | 2014-01-29 | 株式会社捷太格特 | 转向装置 |
JP2014015130A (ja) * | 2012-07-09 | 2014-01-30 | Jtekt Corp | ステアリング装置 |
US8899621B2 (en) | 2012-07-09 | 2014-12-02 | Jtekt Corporation | Steering system |
JP2016043797A (ja) * | 2014-08-22 | 2016-04-04 | 本田技研工業株式会社 | 電動パワーステアリング装置 |
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