JPWO2005005231A1 - Steering device - Google Patents

Abstract

A steering device that drives a steering mechanism according to a steering torque applied to a steering wheel includes a fixed bracket that is fixed to the vehicle side, and a moving bracket that is supported by the fixed bracket and supports the steering torque detection mechanism. And at least one of the brackets, a guide device that allows the travel-side bracket to travel during the secondary collision and guides the travel-side bracket, and a predetermined resistance to travel of the travel-side bracket when the vehicle collides. And a resistance device to be generated.

Description

  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, in addition, improves its collision performance.

In a steering system of an automobile, a so-called power steering device that performs steering assist using an external power source is widely adopted. Conventionally, vane type hydraulic pumps have been used as power sources for power steering devices, and many of these hydraulic pumps are driven by an engine. However, this type of power steering device has a large engine drive loss due to the constant drive of the hydraulic pump (several horsepower to about 10 horsepower at the maximum load), so it can be used in light vehicles with small displacement. It was difficult, and it was unavoidable that the fuel consumption of a car with a relatively large displacement was reduced to a level that could not be ignored.
Therefore, in order to solve these problems, an electric power steering device (hereinafter referred to as EPS) using an electric motor as a power source has attracted attention in recent years. The EPS uses an in-vehicle battery as a power source for the electric motor, so there is no direct engine drive loss, and since the electric motor is started only at the steering assist time, a decrease in driving fuel consumption is suppressed, and electronic control is performed. It has the feature that it can be done very easily.
In the column type EPS, auxiliary steering torque is generated from the electric motor in response to the steering torque applied to the steering wheel, and is decelerated by the power transmission mechanism (reduction gear) and transmitted to the output shaft of the steering mechanism. It has become.
Incidentally, as a conventional technique, Japanese Patent Application Laid-Open No. 10-338147 and Japanese Patent Application Laid-Open No. 2001-334945 have been improved to increase the collapse stroke on the steering column axis.
Moreover, in Japanese translations of PCT publication No. 2001-513467 (FIGS. 1, 2, and 3), it is a guide type type, and it collapses along one of the guide grooves of the fixed side bracket and the moving side bracket. Although the thing is also devised, it is on a steering column axis line similarly, and the structure has the electric motor fixed to the fixed side bracket.
However, Japanese Patent Laid-Open Nos. 10-338147 and 2001-334945 are measures that secure a collapse stroke in order to satisfy the collision performance which is the greatest problem as a column-type electric power steering device. Since a torque sensor, a speed reducer, and an electric motor must be arranged on the column shaft, there is a limit naturally, and there are cases where it does not hold.
JP-T-2001-513467 (FIGS. 1, 2, and 3) is a guide type type, but has the same disadvantage as described above that collapses on the steering column shaft. Also, the electric motor is fixed on the vehicle side, and the column-type electric power steering moves backward due to the deformation of the front of the vehicle at the time of the primary collision. There is a drawback that the position of the steering wheel at the time of the primary collision becomes unstable and the position of the steering wheel becomes unstable, and the collision load tends to vary.
Conventionally, an electric control unit (ECU) for controlling a column-type electric EPS is housed in a case, and the EPS case is disposed in a vehicle compartment or attached to an EPS housing with a bolt or the like. It is.
However, since the ECU is a heat generating component, when the case is attached to the EPS housing with a bolt or the like, heat generation from the EPS electric motor or the like is bulky, and the heat dissipation performance is not always sufficient. .
Further, in a steering device (so-called SBW) called a steer-by-wire system in which a steering wheel and a steering actuator mechanism are not mechanically connected, a conventional steering device is used. Unlike the steering system in which the steering side of the steering wheel and the steering 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, and the detection signal is Input to the controller, determine the turning direction and turning amount of the wheel while considering the vehicle state quantity (lateral acceleration and yaw rate) such as the vehicle speed, and turn the wheel with an electric motor or hydraulic cylinder. Yes.
Also, in order to give the driver a steering reaction force accompanying steering of the steering wheel, as in the case of a conventional steering device, the detected value of the steering force necessary to steer the wheels (motor torque, motor current, rack axial force) The steering wheel shaft is provided with a reaction force generator for returning the steering wheel to the neutral position and generating a reaction force in the direction opposite to the steering direction.
The reaction force generator is configured by an electric motor, a speed reducer, a spring, or the like, or a combination thereof, and is provided with a torque sensor that detects whether the generated reaction force has a desired magnitude or direction. JP-A-2001-114118 and JP-A-2001-130426 disclose mechanical reaction force generators.
Japanese Patent Laid-Open No. 2000-21544 (Patent No. 3275175) relates to a column structure having a reaction force device of SBW, in which a reduction gear & motor part, an angle sensor and a torque sensor are fixed, and a steering wheel mounting shaft side is A telescopic structure is shown that is movable in the axial direction.
However, as a problem unique to the SBW system in terms of layout, according to the above configuration, a steering column and a steering actuator mechanism such as a rack and pinion type steering that are necessary in a conventional steering device are connected via a universal joint. On the other hand, there is no need for a connecting shaft, but the column that supports the steering wheel is equipped with multiple angle detectors, reaction force generators, etc. to detect the amount of steering, and multiple systems to improve system safety. There must be. As a result, the column becomes bulkier than a simple connecting shaft.
In addition, on the column shaft to which a collision energy absorbing device is mounted to alleviate the impact force caused by the collision between the steering wheel and the occupant at the time of a vehicle collision in order to mount devices that are not necessary for the steering device to the column. Space is reduced and collision safety is significantly reduced.

An object of the present invention is to provide a column-type electric power steering apparatus capable of improving the collision performance without reducing the collapse stroke.
In order to achieve this object, according to the present invention, in a column-type electric power steering apparatus that drives a steering mechanism according to a steering torque applied to a steering wheel,
A fixed bracket fixed to the vehicle side;
A moving side bracket supported by the fixed side bracket and supporting the column type electric power steering body;
A guide device that is formed on at least one of the brackets and allows the moving bracket to travel during a secondary collision and guides the moving bracket;
A column-type electric power steering device is provided that includes an impact energy absorbing device that generates a predetermined resistance when the moving bracket travels.
A column type electric power steering apparatus according to the first aspect of the present invention is a column type electric power steering apparatus that drives a steering mechanism in accordance with a steering torque applied to a steering wheel.
A fixed bracket fixed to the vehicle side;
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 formed with a track on at least one of the two brackets;
A predetermined resistance is generated when the moving bracket travels during a vehicle collision, and resistance means is provided.
In the column type electric power steering apparatus according to the first aspect, it is preferable that an electric motor of the column type electric power steering body is fixed to the moving side bracket.
In the column type electric power steering apparatus according to the first aspect, at the time of the primary collision of the vehicle, the column type electric power steering body supported and fixed to the moving side bracket is caused by the inertia force of at least the speed reducer or the heavy weight of the electric motor. It is preferable that the moving side bracket can move forward relative to the vehicle.
In the column type electric power steering apparatus according to the first aspect, it is preferable that the moving portion of the electric motor protruding in a radial direction with respect to the center line of the column type electric power steering body can be regulated by the guide portion.
In the column type electric power steering apparatus according to the first aspect, it is preferable that the intermediate shaft can be easily expanded and contracted by a spline or a serration.
Also, in the column type electric power steering apparatus according to the first aspect, the guide bracket is set horizontally if the guide is set horizontally to the vehicle, and parallel if the guide bracket is parallel to the steering column axis. It is preferable that the moving direction can be selected to some extent freely.
Further, in the column type electric power steering apparatus according to the first aspect, at least the speed reducer, the electric motor, the rudder angle sensor, the ECU, and the steering lock are provided in the fan-shaped space formed by the fixed bracket and the moving bracket. It is preferable to arrange the mechanism.
Moreover, in the column type electric power steering apparatus according to the first aspect, it is preferable to provide an explosive device that explodes at the time of collision so as to assist the traveling of the moving bracket by the inertial force of the electric motor.
In the column type electric power steering apparatus according to the first aspect, it is preferable that the electric motor is disposed coaxially or parallel to the steering column shaft.
The column type electric power steering apparatus according to the second aspect of the present invention generates an auxiliary steering torque from the electric motor in accordance with the steering torque applied to the steering wheel, decelerates by the gear mechanism, and outputs the steering shaft. In the column-type electric power steering device that transmits to
A fixed bracket fixed to the vehicle side;
A moving side bracket supported by the fixed side bracket and supporting the column type electric power steering body;
At least one of the brackets is formed with a track so as to act as a guide, and the moving side bracket travels along the track,
A second means for tightening the moving bracket and the fixed bracket so as to cause a predetermined resistance when the moving bracket travels during a vehicle collision;
The control means for controlling the electric power steering body is arranged on the fixed side bracket.
Further, in the column type electric power steering apparatus according to the second aspect, the control means or the case thereof is fixed to the fixed side bracket,
Or it is preferable that the case of the said control means is comprised integrally with the said fixed side bracket.
In the column type electric power steering apparatus according to the second aspect, it is preferable that an electric motor of the column type electric power steering body is fixed to the moving bracket.
Furthermore, according to the third aspect of the present invention, the steering direction and the steering angle of the steering wheel are detected, and this detection signal is input to the controller, and the steering direction and the steering of the wheel are taken into account while taking the vehicle state quantity into consideration. In the steering device that determines the angle and steers the wheel based on this,
Comprising a guide rail type column comprising a fixed side bracket fixed to the vehicle body, and a moving side bracket that moves relative to the fixed side bracket with its moving direction being regulated by the guide side rail at the time of the collision,
In the column part of the guide rail type column,
A reaction force generator having an electric type, a mechanical type, or both for generating a torque on the steering wheel shaft via a reduction gear;
There is provided a device characterized in that at least one rotation angle detector provided on a steering wheel shaft or a motor shaft and detecting a rotation angle of the steering wheel shaft is arranged.
In the steering device according to the third aspect, it is preferable that a reaction force detector for detecting a reaction force generated by the reaction force generation device is disposed between the reaction force generation device and the steering wheel.
In the steering apparatus according to the third aspect, it is preferable that the column is fixedly supported so that the swing angle position can be changed with respect to the moving side bracket of the guide rail type column.
In the steering apparatus according to the third aspect, it is preferable that the column is fixedly supported so that the axial position and the swing angle position can be changed with respect to the moving side bracket of the guide rail type column.
In the steering device according to the third aspect, it is preferable that the reaction force generator housing and the column housing are integrated.
In the steering apparatus according to the third aspect, it is preferable that the reaction force detector housing and the column housing are integrated.
In the steering device according to the third aspect, the guide rail type bracket portion absorbs the collision energy by generating a predetermined sliding load due to the impact that the occupant has collided with the steering wheel during the collision. It is preferable.
In the steering device according to the third aspect, a mechanism for generating frictional force by pressing both brackets with a bolt via a friction stabilizing member;
It is preferable to include a mechanism that generates deformation resistance by deforming in accordance with relative movement in a comb-like shape along the movement direction.
In the steering device according to the third aspect, the guide rail type bracket portion has an inertial force generated by a reaction force generator and a heavy sensor that is arranged in the column portion due to a deceleration acceleration in the vehicle front direction generated at the time of the primary collision. When the value exceeds the specified value, the shear pin provided between the fixed bracket and the moving bracket is cut and moved to the front of the vehicle to increase the distance between the passenger and the steering wheel. It is preferable to provide an irreversible mechanism so as to avoid a collision between the passenger and the steering wheel.

FIG. 1 is a longitudinal 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 cross-sectional view of a main part of the guide type column type electric power steering apparatus shown in FIG.
FIG. 3 is an arrow view of the arrow A in FIG.
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a cross-sectional view taken along the line CC of FIG.
FIG. 6 is a longitudinal sectional view of a guide type column type electric power steering apparatus according to the second embodiment of the present invention.
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 cross-sectional view of a main part of the guide type column type electric power steering apparatus shown in FIG.
FIG. 9 is a cross-sectional view taken along line BB in FIG.
FIG. 10 is a plan view of a guide type column type electric power steering apparatus according to the fourth embodiment of the present invention.
FIG. 11 is a partially enlarged cross-sectional view of the guide type column type electric power steering device shown in FIG. 10 as viewed from the front.
12 is a front view of the electric power steering apparatus shown in FIG.
13 is a right side view of the electric power steering apparatus shown in FIG.
14 is a left side view of the electric power steering apparatus shown in FIG.
FIG. 15 is a block diagram of a vehicle steering apparatus according to the fifth embodiment of the present invention.
FIG. 16 is a longitudinal sectional view of a guide type column type steering apparatus according to a sixth embodiment of the present invention.
17 is a view taken in the direction of arrow III in FIG.
18 is a cross-sectional view taken along line IV-IV in FIG.
19 is a cross-sectional view taken along line VV in FIG.
FIG. 20 is a longitudinal sectional view of a guide type column type 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.
22 is a cross-sectional view taken along line VIII-VIII in FIG.
23 is a cross-sectional view taken along line IX-IX in FIG.
FIG. 24 is a longitudinal sectional view of a guide type column type steering apparatus according to an eighth embodiment of the present invention.
FIG. 25 is a view taken in the direction of arrow XI in FIG.
26 is a cross-sectional view taken along line XII-XII in FIG.
27 is a cross-sectional view taken along line XIII-XIII in FIG.
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.

Hereinafter, a column electric power steering apparatus according to an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a longitudinal 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 cross-sectional view of a main part of the guide type column type electric power steering apparatus shown in FIG.
FIG. 3 is an arrow view of the arrow A in FIG. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a cross-sectional view taken along the line CC of FIG.
As shown in FIGS. 1 and 2, in the column type electric power steering apparatus according to the present embodiment, a column type electric power steering body PS is disposed in the front portion 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 vehicle rear end of the steering shaft 21, and an output shaft 22 is connected to the vehicle 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, and steering is performed to the front side of the intermediate shaft 13 via a universal joint 24 and the like. A gear mechanism (not shown) is connected. The intermediate shaft 13 includes a male shaft 13a and a female shaft 13b that are splined or serrated to each other, and is configured to expand and contract (slide) in the axial direction.
As shown in detail in FIG. 2, the base end of the torsion bar 25 is press-fitted and fixed to the front side of the steering shaft 21 serving as the input shaft, and the torsion bar 25 is formed inside the output shaft 22 formed hollow. , And its tip 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 at a portion of the steering column 20 corresponding to the vehicle rear side of the output shaft 22. A steering angle sensor 15 and the like are provided at a portion of the steering column 20 corresponding to the vehicle front side of the output shaft 22.
A worm wheel 28 that meshes with a worm 27 that is a drive shaft of the electric motor 6 is attached to the output shaft 22.
As shown in FIG. 2, the column type electric power steering main body PS includes a pair of housings 31 and 32 and is firmly fixed to each other by bolts 33.
One housing 32 is provided with a telescopic bracket 11, and a pivot pin 35 is inserted into a telescopic adjustment groove 34 formed in the telescopic bracket 11 so as to be movable in parallel to the steering shaft. As shown in FIG. 3, 35 is engaged with a tilt pivot bracket 9 provided on the moving side bracket 2 described later.
Accordingly, the steering force generated when the driver steers the steering wheel (not shown) is transmitted to the steered wheels (not shown) via the steering shaft 21, the torsion bar 25, the output shaft 22, and the rack and pinion type steering device. Is done.
The electric motor 6 is attached to the housings 31 and 32, and the rotational force thereof is transmitted to the output shaft 22 via the worm 27 and the worm wheel 28 integrated with the motor output shaft. An appropriate steering assist torque can be applied to the output shaft 22 by appropriately controlling the rotational force and the rotational direction.
A tilt bracket 10 is provided substantially at the center of the steering column 20, and a tilt adjusting groove 41 extending substantially in the vertical direction is formed in the tilt bracket 10. The tilt bracket 10 is integrally fixed to a moving bracket 2 described later.
As shown in FIGS. 2 and 5, a telescopic adjustment groove 42 extending in parallel with the steering shaft direction is formed in the flat fastening portion 20 a extending in the axial direction of the steering column 20. As shown in FIG. 5, a tightening bolt 43 is inserted into 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 tightening portion 20a, respectively. The base end portion of the cam mechanism 45 and the operation lever 12 (tilt lever) is inserted into the distal end portion of the tightening bolt 43, and the adjustment nut 46 is screwed and tightened to the male screw portion at the distal end. is there.
The balance spring 16 is provided between the lower surface of the fixed bracket 1 and the lower surface of the steering column 20, and when the operation lever 12 (tilt lever) is loosened, the column-type electric power steering body PS etc. falls due to its own weight. It is for preventing it from doing.
When the operating lever 12 (tilt lever) is rotated in the tightening direction to widen the cam mechanism 45, the tilt bracket 10, the friction member 44, and the tightening portion 20a of the steering column 20 are pressed, and the tilt and And / or tightening to the telescopic adjustment position.
On the other hand, when the operation lever 12 (tilt lever) is rotated in the reverse release direction and the cam mechanism 45 is narrowed, the tilt bracket 10, the friction member 44, and the tightening portion 20a of the steering column 20 are pressed against each other. Is released, and the tightening to the tilt and / or telescopic adjustment position is released. Thereby, a tilt and / or a telescopic position can be adjusted.
In the present embodiment, as shown in FIGS. 2 and 4, the mounting structure of the column type electric power steering main body PS to the vehicle body is a guide type, and the fixed side bracket 1 fixed to the vehicle body side, A movable bracket 2 fitted to the fixed bracket 1 so as to be movable relative to the fixed bracket 1 is provided extending in a substantially horizontal direction.
As shown in FIG. 4, 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). Further, as shown in FIG. 2, a long hole 53 extending in the axial direction is formed in the fixed side bracket 1.
On the other hand, the moving bracket 2 is formed with 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 by an appropriate number of bolts 4 through the friction stabilizing member 3. The friction stabilizing member 3 cooperates with the bolt 4 to exhibit a predetermined friction force, and the bolt 4 moves through the long hole 53 during the collapse stroke, and then defines the stroke. It comes to work as a stopper.
As shown in FIG. 4, a pair of overhanging portions 62, 62 that fit into the pair of fitting recesses 52, 52 of the fixed side bracket 1 are formed on both sides of the guided portion 61. In addition, a deformable member 8 that is elastically deformable is interposed between the protruding portion 62 and the protruding portion 62. In other words, the deformable members 8 and 8 are formed between the pair of projecting portions 62 and 62 and the fitting recesses 52 and 52, respectively, and extend in the vehicle front-rear direction so that the deformable members 8 and 8 can move the moving bracket 2 without play. It is inserted with a set resistance.
Thereby, a track is formed in at least one of the brackets 1 and 2 so as to act as a guide groove 51 (guide portion), and the moving bracket 2 travels along the track, and the vehicle. The moving side bracket 2 is configured to include a second means for fixing the moving side bracket 2 and the fixed side bracket 1 so as to generate a predetermined resistance when the moving side bracket 2 travels during a collision.
In this embodiment, the moving side bracket 2 is fastened and fixed to the fixed side bracket 1 with the bolts 4, but may be fixed by resin injection or caulking instead of the bolts.
As described above, the tilt pivot bracket 9 and the tilt bracket 10 to which the column type electric power steering body PS and the like are attached are integrally fixed to the lower side of the moving bracket 2.
With the guide groove 51 (guide portion), it is possible to restrict the movement space of the electric motor 6 that generally tends to protrude in the radial direction with respect to the center line of the column type electric power steering body PS.
If the guide groove 51 (guide part) is set horizontally to the vehicle, the moving 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 selected freely to some extent.
At least one of a reduction gear including the worm 27 and the worm wheel 28, the electric motor 6, the rudder angle sensor 15, the ECU, the steering lock, and the like is disposed in the fan-shaped space formed by the fixed bracket 1 and the moving bracket 2. It is. That is, as described above, the torque sensor 14, the worm wheel 28, and the like are provided around the axis of the steering column 20, but the signal projecting portion of the torque sensor 14, the portion of the electric motor 6 and the like protruding in the radial direction are , And is housed in a fan-shaped portion at the angle formed by the fixed bracket 1 and the steering column 20.
From the above, in the present embodiment, the force with which the occupant collides with the steering wheel at the time of the secondary collision of the vehicle is the friction force due to being fixed to the fixed bracket 1 by the bolt 4 via the friction stabilizing member 3. Overcoming and deforming the intermediate shaft 13, deforming the deformable member 8, moving relative to the front of the vehicle along the track groove of the guide groove 51 (guide portion), absorbing impact energy, and absorbing the occupant's impact ease.
In addition, the collapse direction can be substantially horizontal with respect to the vehicle (that is, it can form an angle with the steering column 20), and the collapse stroke is not reduced by the electric motor 6 or the like. It is easy to satisfy the collision performance.
Since the stroke of the guide groove 51 (guide portion) is regulated by a stopper made of a bolt 4, the column-type electric power steering main body PS is not detached from the moving bracket 2, and the guide groove 51 set in advance is set. It can also be avoided that the vehicle travels on the track groove of the (guide unit) and the moving object hits the driver.
Thus, according to the present embodiment, 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 in the guide groove 51 (guide portion). Therefore, the collision performance can be improved without reducing the collapse stroke, and the moving object 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.
In this modification, in addition to the structure of the first embodiment shown in FIGS.
It is configured to explode the explosive at the time of the primary collision and assist the traveling of the moving bracket 2 due to the inertia of the electric motor 6 or the like. For this reason, in this modification, the explosive explosion device 100 is provided on the fixed bracket 1. The explosive explosive device includes a housing 102 that forms an explosive chamber containing explosives 101 and a cylinder 103 that is integral with the housing 102 and extends in the axial direction. A piston 105 is provided in the cylinder 103. One end of a cable 107 is connected to the piston 105, and the other end of the cable is connected to an extension (not shown) of the stationary bracket 1 via a guide pulley 109. Connected to the department.
With such a structure, when a sensor (not shown) detects a primary collision and explodes the gunpowder 101, the piston 105 moves to the right in FIG. 28 and pulls the cable. The column side bracket and the steering column are Move forward.
The other structure of the present modification is the same as that shown in FIGS.
(Second Embodiment)
FIG. 6 is a longitudinal sectional view of a guide type column type electric power steering apparatus according to the second embodiment of the present invention. In FIG. 6, the cross-sectional views (BB, CC) are the same as FIG. 4 and FIG.
In the present embodiment, the electric motor 6 is an offset type parallel to the axis of the steering column 20.
Other configurations, operations, and effects are the same as those in the first embodiment described above.
As described above, according to the first and second embodiments, the column-type electric power steering body and the moving bracket are moved along the guide portion, so that the collision performance is reduced without reducing the collapse stroke. It is possible to improve, and it is possible to avoid those moving objects hitting the driver.
(Third embodiment)
Hereinafter, a column electric power steering apparatus according to a third embodiment of the present invention will be described with reference to the drawings.
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 cross-sectional view of a main part of the guide type column type electric power steering apparatus shown in FIG.
The arrow view of arrow A in FIG. 7 is the same as FIG. FIG. 9 is a cross-sectional view taken along line BB in FIG. The cross-sectional view along the line CC in FIG. 7 is the same as FIG.
In the third embodiment shown in FIGS. 7 to 9, the description of the first embodiment described with reference to FIGS. 1 to 5 can be applied to the third embodiment as it is. The description of the same structural part as that of the embodiment will be omitted, and only the part of the third embodiment that is different from the first embodiment will be described below.
In the third embodiment, as shown in FIGS. 8 and 9, an ECU 17 (electric control means) for controlling the column type electric power steering body PS is housed in a case 18. Is fixed to the upper surface of the fixed bracket 1 with bolts 19 or the like.
The ECU case 18 may be configured integrally with the fixed side bracket 1.
As described above, according to the third embodiment, the ECU 17 or the ECU case 18 is fixed to the fixed bracket 1 with the bolts 19 or is integrally formed, so that the fixed bracket 1 can be used as an extremely effective heat sink. Furthermore, since the fixed bracket 1 is fixed to the vehicle side, the effect is even more so.
On the other hand, since the electric motor 6 which is a heat generating component of the electric power steering main body PS is fixed to the housings 31 and 32 of the electric power steering main body PS, as a result, the heat sink is separated and the heat dissipation performance is improved. The output of the electric power steering body PS can be improved as compared with the conventional case.
At the same time, the ECU 17 can be accommodated in the fan-shaped space formed by the angle between the fixed bracket 1 and the movable bracket 2 so that the layout can be improved and the electric power steering body PS can be modularized. .
According to the third embodiment, by fixing the control means or the case of the control means to the fixed side bracket, or by integrally forming it, the fixed side bracket can also be used as a very effective heat sink, Further, since the fixed side bracket is fixed to the vehicle side, the effect is even more so.
On the other hand, since the electric motor that is a heat generating component of the electric power steering body is fixed to the housing of the electric power steering body, as a result, the heat sink is separated, and the heat dissipation performance can be improved. The output of the electric power steering body is improved as compared with the conventional case.
At the same time, since the control unit can be stored in the fan-shaped space formed by the fixed side bracket and the moving side bracket, the layout can be improved and the electric power steering body can be modularized.
(Fourth embodiment)
FIG. 10 is a plan view of a guide type column type electric power steering apparatus according to the fourth embodiment of the present invention.
FIG. 11 is a partially enlarged cross-sectional view of the guide type column type electric power steering device shown in FIG. 10 as viewed from the front.
12 is a front view of the electric power steering apparatus shown in FIG. 10, FIG. 13 is a right side view of the apparatus, and FIG. 14 is a left side view of the apparatus.
As shown in FIGS. 10 and 11, in the column type electric power steering apparatus according to the fourth embodiment, a column type electric power steering body PS is disposed in the front portion 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 vehicle rear end of the steering shaft 21, and an output shaft 22 is connected to the vehicle 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 proximal end of a torsion bar (not shown) is press-fitted and fixed to the vehicle front side of the steering shaft 21 serving as an input shaft, and this torsion bar extends inside the output shaft 22 formed hollow, The tip is fixed to the end of the output shaft 22.
A torque sensor, a circuit board, and the like are provided at a portion of the steering column 20 corresponding to the vehicle rear side of the output shaft 22. An ECU 115 or the like is provided at a portion of the steering column 20 corresponding to the vehicle front side of the output shaft 22.
A worm wheel (not shown) meshed with a worm (not shown) that is a drive shaft of the electric motor 6 is attached to the output shaft 22.
The steering column 20 is integrally connected to gear housings 31 and 32 for storing the worm wheel portion at the front end portion of the vehicle. The electric motor 6 is fixedly supported by the gear housings 31 and 32.
In the fourth embodiment, 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 401.
The lower bracket 401 includes a rectangular top plate portion 401a that extends horizontally around the steering axis above the column, both side plate portions 401b and 401b that extend downward from both sides of the top plate to both sides of the column, and both side plate portions. The mounting plate portions 401c and 401c that extend horizontally from both sides, and the connecting plate portions 401d and 401d that are bent downward on the rear sides of both sides of the mounting plate portion and extend to the rear of the vehicle and in parallel with the column in between. ing.
The lower bracket 401 has bolt holes 401e and 401e formed at the vehicle front ends of the mounting plate portions 401c and 401c, and is attached and fixed to the vehicle body side strength member by bolts (not shown) through these bolt holes.
Both side plate portions 401c and 401c of the lower bracket 401 integrally have downward projecting portions 401f.
The steering column is supported between the downward projecting portions 401f at the vehicle front side end portion via a bolt 401g so as to be tiltable about the bolt.
The upper bracket 402 has a top plate portion 402a extending above the steering column 20, side plate portions 402b and 402b that are bent downward from both sides of the top plate portion and extend to predetermined distance positions on both sides of the steering column, and lower ends of these side plate portions. Vehicle body mounting plate portions 402c and 402c extending in the horizontal direction.
A distance bracket 403 is attached to the outer peripheral surface of the steering column 20 between the side plate portions 402b and 402b of the upper bracket 402. The distance bracket 403 is fixed on both sides of the outer periphery of the steering column 20 and extends along the inner sides of the side plates 402b, 402b of the upper bracket 402, and integrally connects the both sides above the steering column. And a top plate portion.
Both side plate portions 402b, 402b of the upper bracket and both side plate portions 403a, 403a of the distance bracket 403 overlap on the vehicle rear side, and the steering body PS is connected to a known tightening mechanism 412 via a pin 410 that passes through the overlapping portion. It is supported through tilting and / or telescopic position adjustment.
The upper bracket 402 overlaps with connecting plate portions 401d and 401d which are vehicle rear end portions of the lower bracket at the vehicle front side end portions of the vehicle body mounting plate portions 402c and 402c, and the vehicle body mounting plate of the upper bracket is overlapped with the overlapping portion. Long holes 402g and 402g extending in the axial direction are formed in the portion, while bolts holes are formed in the connecting plate portions 401d and 401d of the lower bracket 401, and both are bolted by bolts 415 and 415 through these holes. ing.
In the bolt fastening portion, coating plates 416 and 416 whose surfaces are coated with resin are interposed between the upper bracket and the lower bracket. The coating plates 416 and 416 have a U-shaped cross section that is substantially lateral in cross section, and have a shape in which the vehicle body mounting plate portions 402c and 402c are sandwiched vertically from the front of the vehicle to the rear of the vehicle from the bolt penetration portion.
Holes 402h and 402h that open toward the rear of the vehicle are formed in the vehicle bracket mounting portions 402c and 402c of the upper bracket 402 so as to penetrate vertically. Capsules 418 and 418 are provided in these holes 402h and 402h. Each capsule 418 includes an aluminum capsule element 418a and a resin capsule element 418b. The aluminum capsule element 418a has a hole 418e in the central portion 418d, and is fitted in the hole 402h, and the peripheral flange portion 418f is in contact with the mounting plate 402c. The resin capsule element 418b has a central part for fitting the central part 418d of the aluminum capsule element 418a and a peripheral flange 418h of the central part, and the peripheral flange part 418h is in contact with the mounting plate 402c from above. The vehicle body side mounting plate 402c is fixed to the vehicle body strength member by a bolt (not shown) inserted through the hole 418e, and is sandwiched between the flange portions 418f and 418h.
With such a structure, the capsules 418 and 418 are destroyed when a forward load of a predetermined value or more is applied to the upper bracket 402 supporting the steering mechanism including the steering body PS and the electric motor 4 due to a secondary collision. The upper bracket 402 moves forward of the vehicle.
The upper bracket 402 is supported by the lower bracket 401 via the bolts 415 and 415 even when the capsules 418 and 418 are detached. Therefore, the steering mechanism does not fall, and therefore the steering column hits the occupant's knee. There is no.
In the present embodiment, the detachment load at the time of the secondary collision can be controlled by the shape of the bolt penetration long hole of the upper bracket 402c and the structure and / or specifications of the coating plate members 416 and 416 and the capsules 418 and 418. Instead of the capsules 418 and 418, a coating plate may be used.
According to the present embodiment, not only the capsules 418 and 418 between the vehicle body side strength member and the upper bracket 402 but also the coating plate member 416 between the upper bracket 402 and the lower bracket 401 for absorbing energy at the time of the secondary collision. 416 can also be shared, which is advantageous when a large collapse overload is required.
Moreover, according to this embodiment, it becomes easy to select the connection position of the upper bracket 402 to the vehicle body side.
(Fifth embodiment)
FIG. 15 is a block diagram of a vehicle steering apparatus according to the fifth embodiment of the present invention.
In the vehicle steering apparatus, the steering side of the steering wheel a and the steering side of the wheel n are separated, and a steering controller e is provided between them.
On the steering side, the steering wheel a, the angle detector b for detecting the steering direction and the steering angle of the steering wheel a, the steering wheel a is returned to the neutral position, and the steering wheel a corresponds to the steering angle of the steering wheel a. A reaction force generator d for generating a reaction force is provided.
A torque detector c (reaction force detector) 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 on the steered side. A steering shaft k that converts the turning force into linear motion is connected to the wheel n via a tie rod m and a knuckle arm. Further, a steered load detector h and a steered amount detector i for detecting the actual steered load and steered amount of the wheel n are provided.
The steering controller e includes a vehicle state quantity detector f that detects vehicle speed, yaw rate, lateral acceleration, and the like, the angle detector b, the reaction force detector c, the steering load detector h, and the above. A detection signal from the turning amount detector i is input.
The steering controller e determines the steering direction and the steering angle of the wheel n based on the inputted steering direction and steering angle information, speed information, yaw rate, lateral acceleration and other information about the elements, Output to the turning force generator g. As a result, the steering axis k moves linearly, the tie rod m and the knuckle arm are actuated, and the wheel n is steered.
(Sixth embodiment)
Examples in which the fifth embodiment is embodied will be described below as sixth to eighth embodiments.
FIG. 16 is a longitudinal sectional view of a guide type column type steering apparatus according to a sixth embodiment of the present invention.
17 is a view taken in the direction of arrow III in FIG.
18 is a cross-sectional view taken along line IV-IV in FIG.
19 is a cross-sectional view taken along line VV in FIG.
As shown in FIG. 16, a column-type reaction force generator d is disposed in the front portion of the steering column 20 in the vehicle. An angle detector b is disposed adjacent to this, and a torque detector c (reaction counter) that detects a reaction force generated by the reaction force generator d between the reaction force generator d and the steering wheel. 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 force shaft 522 is connected to the front side of the vehicle. It is.
A proximal 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 this torsion bar 25 extends inside a reaction force shaft 522 formed in a hollow shape. The tip is fixed to the end of the reaction force shaft 522 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 shaft 522. An angle detector b and the like are provided at a portion of the steering column 20 corresponding to the vehicle front side of the reaction force shaft 522.
A worm wheel 28 that meshes with a worm 27 that is a drive shaft of the electric motor 6 is attached to the reaction force shaft 522.
As shown in FIG. 16, the column-type reaction force generator d includes a pair of housings 31 and 32, which are firmly fixed to each other by bolts 33 and the like.
A telescopic motion guide bracket 11 is provided integrally with one housing 32, and a pivot pin 35 is inserted into a telescopic adjustment groove 34 formed in the telescopic motion guide bracket 11 so as to be movable in the telescopic direction. As shown in FIG. 17, the pivot pin 35 is locked to a tilt pivot bracket 9 provided on the moving side bracket 2 described later.
A tilt bracket 10 is provided substantially at the center of the steering column 20, and a tilt adjusting groove 41 extending substantially in the vertical direction is formed in the tilt bracket 10. The tilt bracket 10 is integrally fixed to a moving bracket 2 described later.
As shown in FIGS. 16 and 19, a telescopic adjustment groove 42 extending in the steering axial direction is formed in the flat fastening portion 20 a extending in the axial direction of the steering column 20. As shown in FIG. 19, a tightening bolt 43 is inserted into 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 tightening portion 20a, respectively. The base end portion of the cam mechanism 45 and the operation lever 12 (tilt lever) is inserted into the distal end portion of the tightening bolt 43, and the adjustment nut 46 is screwed and tightened to the male screw portion at the distal end. is there.
When the operation lever 12 (tilt lever) is loosened, the balance spring 16 is provided between the lower surface of the fixed side bracket, which will be described later, and the lower surface of the column, and the column type reaction force generator d and the like are dropped by its own weight. It is for preventing.
When the operating lever 12 (tilt lever) is rotated in the tightening direction to widen the cam mechanism 45, the tilt bracket 10, the friction member 44, and the tightening portion 20a of the steering column 20 are pressed, and the tilt and And / or tightening to the telescopic adjustment position.
On the other hand, when the operation lever 12 (tilt lever) is rotated in the reverse release direction and the cam mechanism 45 is narrowed, the tilt bracket 10, the friction member 44, and the tightening portion 20a of the steering column 20 are pressed against each other. Is released, and the tightening to the tilt and / or telescopic adjustment position is released. Thereby, tilt and / or telescopic adjustment can be performed.
As shown in FIGS. 16 and 18, the column-type steering device is attached to the vehicle body in a guide type, and is fixed to the vehicle body side, and to the fixed side bracket 1. The movable side bracket 2 fitted to the fixed side bracket 1 so as to be relatively movable extends in a substantially horizontal direction.
As shown in FIG. 18, 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). As shown in FIG. 16, the fixed bracket 1 has a long hole 53 extending in the axial direction.
On the other hand, the moving bracket 2 is formed with 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 by an appropriate number of bolts 4 through the friction stabilizing member 3. The friction stabilizing member 3 cooperates with the bolt 4 to exhibit a predetermined frictional force, and the bolt 4 moves in the long hole 53 during the collapse stroke, and then defines the stroke. To work as a stopper.
As shown in FIG. 18, a pair of overhanging portions 62, 62 that fit into the pair of fitting recesses 52, 52 of the fixed side bracket 1 are formed on both sides of the guided portion 61. A comb-like deformable member 8 that can be elastically deformed is interposed between the protruding portion 62 and the protruding portion 62. That is, in FIG. 18, the deformable members 8, 8 are formed between the pair of projecting portions 62, 62 and the fitting recesses 52, 52 and extend substantially in the vertical direction extending in the vehicle longitudinal direction. It is inserted with a set resistance against running.
As described above, the tilt pivot bracket 9 to which the reaction force generator d and the like are attached and the tilt bracket 10 are integrally fixed to the lower side of the moving bracket 2.
Further, the housings 31 and 32 of the reaction force generator d and the steering column 20 (column housing) are integrated. Further, the housing of the torque detector c (reaction force detector) and the steering column 20 (column housing) are integrated. Accordingly, it is possible to increase rigidity and prevent generation of unpleasant vibration (resonance caused by engine rotation or the like).
As described above, the guide rail type bracket portion absorbs the collision energy by generating a predetermined sliding load due to the impact that the occupant has secondarily collided with the steering wheel at the time of collision. That is, both the brackets 1 and 2 are pressed by the bolt 4 via the friction stabilizing member 3 to generate a frictional force, and the comb-like deformable member 8 is aligned in the moving direction in accordance with the relative movement. And a mechanism for generating deformation resistance by deformation.
From the above, at the time of the collision of the vehicle, the deformable member 8 is deformed and relatively moved forward along the track groove of the guide groove 51 (guide portion).
In addition, the collapse direction can be substantially horizontal with respect to the vehicle (can form an angle with the steering column 20), and the electric motor 6 or the like does not reduce the collapse stroke. It is easy to satisfy performance.
Further, since the stroke of the guide groove 51 (guide portion) is regulated by the bolt 4 serving as a stopper, the column-type reaction force generator d is set in advance without being detached from the moving bracket 2. It can also be avoided that the vehicle travels on the track groove of the guide groove 51 (guide portion) and the moving object hits the driver.
Thus, since the column-type reaction force generator d and the moving bracket 2 are on the moving side with respect to the vehicle, the movement is performed along the guide groove 51 (guide portion). The collision performance can be improved without reducing the collapse stroke, and the moving object can be prevented from hitting the driver.
(Seventh embodiment)
FIG. 20 is a longitudinal sectional view of a guide type column type 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.
22 is a cross-sectional view taken along line VIII-VIII in FIG.
23 is a cross-sectional view taken along line IX-IX in FIG.
The seventh embodiment differs from the sixth embodiment only in the tilt / telescopic adjustment structure, and other configurations, operations, and effects are the same as those of the sixth embodiment. Therefore, only the differences will be described.
As shown in FIG. 20, the column-type reaction force generator d includes a pair of housings 31 and 32 and is firmly fixed to each other by bolts 33 and the like.
One housing 32 is integrally provided with a bracket 70, and a pivot pin 35 is inserted into the bracket 70, and the pivot pin 35 is connected to the moving side bracket 2 as shown in FIG. It is locked to a tilt pivot bracket 9 provided on the head.
As shown in FIGS. 20 and 23, the steering column includes an outer side lower column 71 and an inner side upper column 72 slidably fitted thereto.
Further, the tilt bracket 10 is 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.
As shown in FIG. 23, the outer lower column 71 includes a pair of clamp portions 73a and 73b formed thickly below, and tightens the tilt grooves of the clamps 73a and 73b and the tilt brackets 10 and 10. Bolts 43 are inserted. The base end portion of the cam mechanism 45 and the operation lever 12 (tilt lever) is inserted into the distal end portion of the tightening bolt 43, and the adjustment nut 46 is screwed and tightened to the male screw portion at the distal end. is there.
A holding portion 74 is provided on the upper side of the lower column 71, and a stopper 75 is supported by a pin 76 in the holding portion 74. The lower end portion of the stopper 75 is engaged with a telescopic range groove 77 formed in the upper column 72 so as to define a telescopic adjustment range during telescopic adjustment.
When the operating lever 12 (tilt lever) is rotated in the tightening direction to widen the cam mechanism 45, the tilt bracket 10 and the pair of clamp portions 73a and 73b are pressed, and the lower column 71 is moved to the upper column 72. It is tightened against the tilt and / or telescopic adjustment position.
On the other hand, when the operating lever 12 (tilt lever) is rotated in the reverse release direction and the width of the cam mechanism 45 is narrowed, the pressing of the tilt bracket 10 is released, the tilt tightening is released, and the tilt can be adjusted. it can.
Further, when the pressing of the pair of clamp portions 73a and 73b is also released, the lower column 71 releases the pressing to the upper column 72, and the upper column 72 can be telescopically adjusted.
(Eighth embodiment)
FIG. 24 is a longitudinal sectional view of a guide type column type steering apparatus according to an eighth embodiment of the present invention.
FIG. 25 is a view taken in the direction of arrow XI in FIG.
26 is a cross-sectional view taken along line XII-XII in FIG.
27 is a cross-sectional view taken along line XIII-XIII in FIG.
The eighth embodiment is different from the sixth embodiment only in the moving structure at the time of collision, and the other configurations, operations, and effects are the same as those of the sixth embodiment. Therefore, only the differences will be described.
As shown in FIGS. 24 and 26, the column-type steering device is attached to the vehicle body in a guide type, and is fixed to the vehicle body side, and is fixed to the fixed side bracket 1. A movable side bracket 2 fitted to the fixed side bracket 1 so as to be movable is provided extending in a substantially horizontal direction.
As shown in FIG. 26, 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).
On the other hand, the moving bracket 2 is formed with a guided portion 61 movably fitted in the guide groove 51 (guide portion).
The guided portion 61 is fixed to the fixed side bracket 1 by a plurality of shear pins 80 (fuses).
As shown in FIG. 26, a pair of overhanging portions 62, 62 that fit into the pair of fitting recesses 52, 52 of the fixed side bracket 1 are formed on both sides of the guided portion 61. Ratchets 81 and 81 that are irreversible mechanisms are interposed between the fitting recesses 52 and 52 and the overhanging portions 62 and 62.
Therefore, in the guide rail type bracket portion, the inertia force generated by the heavy load of the reaction force generator d and the detectors b and c disposed in the column 20 due to the deceleration in the forward direction of the vehicle generated at the time of the primary collision is greater than or equal to a predetermined value. The shear pin 80 (fuse) provided between the fixed side bracket 1 and the moving side bracket 2 is cut and moved to the front of the vehicle to increase the distance between the occupant and the steering wheel a. An irreversible mechanism 81 (ratchet) is provided so as not to bounce back and avoid collision between the occupant and the steering wheel a.

Claims (23)

In the column type electric power steering device that generates auxiliary steering torque from the electric motor according to the steering torque applied to the steering wheel, decelerates it by the gear mechanism, and transmits it to the output shaft of the steering mechanism.
A fixed bracket fixed to the vehicle side;
A moving side bracket supported by the fixed side bracket and supporting the column type electric power steering body;
At least one of the brackets is formed with a track so as to act as a guide, and the moving side bracket travels along the track,
And a second means for fixing the moving bracket to the fixed bracket so as to generate a predetermined resistance when the moving bracket travels during a vehicle collision. apparatus. The column type electric power steering apparatus according to claim 1, wherein an electric motor of the column type electric power steering body is fixed to the moving side bracket. At the time of the primary collision of the vehicle, the moving side bracket is relatively relative to the vehicle by the inertia force of at least the speed reducer of the column type electric power steering body supported and fixed to the moving side bracket. The column type electric power steering apparatus according to claim 1, wherein the column type electric power steering apparatus can move forward. 2. The column type electric power steering apparatus according to claim 1, wherein a movement space of the electric motor protruding in a radial direction with respect to a center line of the column type electric power steering body can be regulated by the guide portion. The column type electric power steering apparatus according to claim 1, wherein the intermediate shaft is easily extendable and contractable by a spline or a serration. If the guide portion is set horizontally to the vehicle, the moving side bracket can be set horizontally or parallel to the steering column axis, that is, the moving direction can be freely selected to some extent. The column-type electric power steering apparatus according to claim 1. The at least one of the speed reducer, the electric motor, the rudder angle sensor, the ECU, and the steering lock is disposed in a fan-shaped space having an angle formed by the fixed side bracket and the moving side bracket. The column-type electric power steering apparatus described. 2. The column type electric power steering apparatus according to claim 1, further comprising a device for a gunpowder during collision so as to assist the traveling of the moving side bracket by the inertial force of the electric motor. 2. The column type electric power steering apparatus according to claim 1, wherein the electric motor is disposed coaxially or parallel to the steering column shaft. In the column type electric power steering device that generates auxiliary steering torque from the electric motor according to the steering torque applied to the steering wheel, decelerates it by the gear mechanism, and transmits it to the output shaft of the steering mechanism.
A fixed bracket fixed to the vehicle side;
A moving side bracket supported by the fixed side bracket and supporting the column type electric power steering body;
At least one of the brackets is formed with a track so as to act as a guide, and the moving side bracket travels along the track,
A second means for fixing the moving side bracket to the fixed side bracket so as to generate a predetermined resistance when the moving side bracket travels during a vehicle collision;
The column type electric power steering apparatus according to claim 1, wherein the control means for controlling the electric power steering body is disposed on the fixed bracket. The control means or its case is fixed to the fixed side bracket,
The column type electric power steering apparatus according to claim 10, wherein the case of the control means is formed integrally with the fixed bracket. The column type electric power steering apparatus according to claim 10, wherein an electric motor of the column type electric power steering body is fixed to the moving side bracket. Detect the steering direction and steering angle of the steering wheel, input this detection signal to the controller, determine the steering direction and steering angle of the wheel while considering the vehicle state quantity, and steer the wheel based on this In the steering device designed to
Comprising a guide rail type column comprising a fixed side bracket fixed to the vehicle body, and a moving side bracket that moves relative to the fixed side bracket with its moving direction being regulated by the guide side rail at the time of the collision,
In the column part of the guide rail type column,
A reaction force generator having an electric type, a mechanical type, or both for generating a torque on the steering wheel shaft via a reduction gear;
A steering apparatus comprising: at least one rotation angle detector that is provided on a steering wheel shaft or a motor shaft and detects a rotation angle of the steering wheel shaft. The steering device according to claim 13, wherein a reaction force detector for detecting a reaction force generated by the reaction force generation device is disposed between the reaction force generation device and the steering wheel. 14. The steering apparatus according to claim 13, wherein the column is fixedly supported so as to be able to change a tilt position with respect to a moving bracket of the guide rail type column. 14. The steering apparatus according to claim 13, wherein the column is fixedly supported so that the position in the axial direction and the tilt position can be changed with respect to the moving bracket of the guide rail type column. The steering device according to claim 13, wherein the reaction force generator housing and the column housing are integrated. The steering device according to claim 14, wherein the reaction force detector housing and the column housing are integrated. The steering device according to claim 1 or 13, wherein the guide rail type bracket portion absorbs collision energy at the time of a secondary collision. A mechanism for generating frictional force by pressing both brackets with a bolt via a friction stabilizing member;
The steering device according to claim 19, further comprising: a mechanism that generates deformation resistance by deforming in accordance with relative movement in a comb tooth shape in a moving direction. The guide rail type bracket is fixed on the fixed side when the inertial force generated in the reaction force generator and sensor heavy object placed in the column exceeds a predetermined value due to the deceleration in the vehicle forward direction that occurs during the primary collision. An irreversible mechanism is provided to prevent the shear pin provided between the bracket and the moving bracket from breaking, moving forward and increasing the distance between the occupant and the steering wheel, and bouncing back after moving. The steering apparatus according to claim 1 or 13, wherein a collision between an occupant and a steering wheel is avoided. In a steering device that drives a steering mechanism according to a steering torque or a steering angle applied to a steering wheel,
A fixed bracket fixed to the vehicle side;
A moving side bracket supported by the fixed side bracket and supporting the steering body;
A guide device that is formed on at least one of the brackets and allows the moving bracket to travel during a secondary collision and guides the moving bracket;
A steering apparatus comprising an impact energy absorbing device that generates a predetermined resistance when the moving bracket travels. In a steering device that drives a steering mechanism according to a steering torque or a steering angle applied to a steering wheel,
A fixed bracket fixed to the vehicle side;
A movable bracket supported by the fixed bracket and supporting a steering torque detection mechanism or a steering angle detection mechanism;
At least one of the brackets is formed with a track so as to act as a guide, and the moving side bracket travels along the track,
And a second means for generating a predetermined resistance when the moving bracket travels during a vehicle collision.

Images