JP2006142889A - Wheel steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering device making the maximum steering angle large as a steering device which does not interfere with a wheel house even at the time of large steering of a wheel, and not interfering with the vehicle at the time of bounding. <P>SOLUTION: Concerning (a), when a steering rack 10 is stoked like as (b) while a knuckle 2 is at a neutral position, the knuckle 2 is turned to an α direction through rods 11, 12 and an arm 2a. By displacement β of a pin 9 accompanied with that, members 7, 8 are rotated in γ and δ directions, and a vehicle body side attaching end 3a of a member 3 approaches a vehicle body side attaching end 4a of a member 4 through rotations of an arm member 5. Therefore, the member 3 is rotated in a ε direction, the knuckle attaching end 3b of the member 3 is displaced outward in a vehicular width direction by τ. At the time of turning in an opposite direction, the knuckle attaching end 3b is displaced like as (c). A wheel is separated outward in the vehicular width direction from an inner surface of a wheel house at the time of steering, thereby increasing the maximum steering angle. Components 3, 4, 7, 8, 11, 12 are extended outward in the vehicular width direction from a vehicle body frame 1, so that the steering device does not interfere with a vehicle body at the time of bounding. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a device for turning a wheel, and more particularly to a wheel turning device capable of increasing a maximum turning angle without widening a wheel house.

When a wheel is steered around a kingpin axis, generally either the front or rear of the wheel moves inward of the vehicle width and the other moves outward of the vehicle width, thereby changing the toe angle of the wheel. Is generally generated.
For this reason, if there is a demand to increase the turning angle and an attempt is made to satisfy this requirement, the front or rear part of the wheel that has moved inward in the vehicle width direction partially interferes with the tire wheel house, and more than a certain degree Cannot increase the turning angle of the wheels.

In order to avoid this interference and obtain the required large steering angle, if you try to widen the wheel house inward in the vehicle width direction, this will sacrifice the space for the engine room etc. It will be impossible to install engines and transmissions.
Therefore, in the end, in order not to sacrifice the mountability of the engine and the transmission, the position of the body frame remains the same, and a part of the body frame is scraped to widen the wheel house inward in the vehicle width direction.

  However, if a part of the body frame is scraped off in this way, the cross-sectional area of the body frame cannot be secured sufficiently large, and the reduction in rigidity of the suspension mounting portion of the body frame cannot be denied. There has been a problem that sound vibration performance such as road noise is reduced.

Thus, conventionally, as a vehicle steering apparatus that can increase the maximum turning angle of a wheel, for example, the one described in Patent Document 1 has been proposed.
In the vehicle steering device described in Patent Document 1, an expansion / contraction coupling device is disposed at an intermediate portion of a link rod that links the knuckle and the rack and pinion transmission mechanism 11, and the wheel on the inner side in the turning direction of the vehicle is the largest. Even when the turning angle is reached, the maximum turning angle of the wheels on the outer side in the turning direction can be increased.
JP-A-6-219314

However, in the vehicle steering apparatus described in Patent Document 1, only the maximum turning angle of the turning direction outer wheel is increased, and the turning angle of the turning direction inner wheel cannot be increased. This does not fundamentally solve the problem that the maximum turning angle of the wheel is restricted.
The present invention increases the maximum turning angle for both the inner and outer wheels in the turning direction without widening the tire wheel house inward in the vehicle width direction or sacrificing space in the engine room or the like due to deformation of the body frame. The purpose is to propose a wheel steering device that can be enlarged,
A further object of the wheel steering device is to prevent components of the wheel steering device from interfering with the vehicle body frame even when the wheels bounce.

For this purpose, the wheel steering device according to the invention is constructed as described in claim 1.
That is, the present invention achieves the above-mentioned object by turning the wheel while turning the wheel while turning the vehicle outward in the vehicle width direction.
A first link member and a second link member that extend outward from the vehicle body in the vehicle width direction and are swingable in the vehicle longitudinal direction and attached to the vehicle body,
A knuckle that rotatably supports the wheel is attached to the end of the first link member distant from the vehicle body side attachment end so that it can be steered.
A free end far from the vehicle body side attachment end of the second link member is connected between the vehicle body side attachment end and the knuckle attachment end of the first link member,
One of the vehicle body side attachment ends of the first link member and the second link member can be displaced in the vehicle front-rear direction,
In response to the steering from the neutral position of the knuckle, the vehicle body side mounting end of the first link member or the second link member that can be displaced in the vehicle longitudinal direction is connected to the second link member or the second link member that cannot be displaced in the vehicle longitudinal direction. Displacement toward the vehicle body side attachment end of the one link member is provided, and an outing mechanism for displacing the knuckle attachment end of the first link member outward in the vehicle width direction is provided.

According to the configuration of the present invention, since the knuckle is displaced outward in the vehicle width direction when the wheel rotatably supported by the knuckle is steered, the wheel is moved outwardly in the vehicle width direction from the inner surface of the tire wheel house during the steering. Leave.
Therefore, even if the wheel is steered greatly and the front part or the rear part of the wheel is greatly displaced inward in the vehicle width direction, the wheel can be prevented from interfering with the wheel house, and the maximum steering of the wheel can be avoided. The corner can be increased.

In addition, such an effect can be achieved without relying on the inward expansion of the tire wheel house in the vehicle width direction or without depending on the deformation of the body frame. The effect can be achieved.
In addition, the above-described operational effect, that is, the operational effect that the maximum turning angle can be increased without sacrificing the space of the engine room or the like can be similarly achieved for both the inner and outer wheels in the turning direction.

In addition, the wheel steering device of the present invention is provided with a component that extends from the vehicle body outward in the vehicle width direction or is associated with a component that extends in the direction. Even when the vehicle bounces due to the suspension stroke, the components of the wheel steering device do not interfere with the vehicle body, and it is not necessary to scrape the vehicle body frame to avoid this interference.
Therefore, the cross-sectional area of the body frame is not sacrificed, the cross-sectional area of the body frame can be secured sufficiently large, the rigidity of the suspension mounting portion of the body frame can be sufficiently secured, and the steering stability It is possible to avoid deterioration in sound performance and sound vibration performance such as road noise.

Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings.
FIG. 1 is a plan view showing a wheel turning device according to an embodiment of the present invention in combination with a rack and pinion type steering device.
In FIG. 1, 1 is a vehicle body frame, 2 is a knuckle, and the knuckle 2 supports a wheel (not shown) so as to rotate around an axis O.
The knuckle 2 has a knuckle arm 2a extending in the vehicle front-rear direction, and the knuckle arm 2a is operated in the vehicle width direction (left-right direction in FIG. 1) to show a wheel rotatably supported by the knuckle 2. It shall steer from the neutral (non-steering) position in the corresponding direction.

The wheel steering device for that purpose includes a first link member 3 and a second link member 4 that extend outward from the vehicle body frame 1 in the vehicle width direction.
The first link member 3 is attached to the vehicle body frame 1 such that the inner end 3a in the vehicle width direction can be displaced in the vehicle front-rear direction (vertical direction in FIG. 1) via the arm member 5 and can swing in the vehicle front-rear direction.
The second link member 4 is pivotally supported by the pin 6 so that the inner end 4a in the vehicle width direction can swing in the vehicle front-rear direction, and is attached to the vehicle body frame 1. The vehicle body side attachment position of the second link member 4 is the vehicle front-rear position. It is impossible to displace both the direction and the vehicle width direction.

The arm member 5 is pivotally supported by the vehicle body frame 1 with the base end 5a swingable in the vehicle front-rear direction. The arm member 5 extends inward in the vehicle width direction from the vehicle body frame mounting base end 5a, so The inner end 3a of the first link member 3 in the vehicle width direction is articulated to the end 5b.
The knuckle 2 that rotatably supports the wheel is attached to the end portion 3b of the first link member 3 that is distant from the vehicle body side attachment end 3a so as to be steerable.
A free end 4b far from the vehicle body side attachment end 4a of the second link member 4 is articulated between the vehicle body side attachment end 3a and the knuckle attachment end 3b of the first link member 3.

The connecting link member 7 is connected to the first link member 3 between the location of the first link member 3 connecting the free end 4b of the second link member 4 and the vehicle body side mounting end 3a of the first link member 3. The connecting link member 8 is provided so as to be able to swing in the vehicle width direction, and another connecting link member 8 is provided so as to be capable of swinging in the vehicle width direction. At the time of turning, the position is aligned on a straight line in the longitudinal direction of the vehicle.
The free link ends 7b, 8b of the connection link members 7, 8 remote from the joint ends 7a, 8a of the connection link members 7, 8 with respect to the first link member 3 and the second link member 4 are mutually connected by the pin 9, and the connection link member 7 , 8 articulated so as to be able to swing in the vehicle width direction.

On the one hand, the corresponding end of the steering rack 10 (steering actuator) is connected to the pin 9 via a tie rod 11, and on the other hand, it is connected to the free end of the knuckle arm 2a via a connecting rod 12.
Thus, when the steering rack 10 is stroked by steering with a steering wheel (not shown), the knuckle 2 is steered together with the wheels through the tie rod 11 and the connecting rod 12.

In response to the bi-directional turning of the knuckle 2 from the illustrated neutral position, the connecting link members 7 and 8 by the pin 9 correspond to the corresponding vehicle widths around the mounting ends 7a and 8a with respect to the first and second link members 3 and 4. Since the end portions 7a and 8a of the connecting link members 7 and 8 approach each other, the vehicle body side mounting end 3a of the first link member 3 that can be displaced in the vehicle longitudinal direction is The knuckle mounting end 3b of the first link member 3 is displaced outward in the vehicle width direction.
Therefore, the connecting link members 7 and 8, the pin 9, and the rods 11 and 12 that cause the above action constitute an outing mechanism in the present invention.

The operation of the wheel turning device according to the embodiment will be described below with reference to FIGS. 2 (a), (b), and (c).
Fig. 2 (a) shows the state when the knuckle 2 (wheel) is in the same neutral (non-steered) position as in Fig. 1, and the connecting link members 7, 8 are aligned with each other in a straight line in the vehicle longitudinal direction. Yes.

When the steering rack 10 is stroked to the left in the figure as shown in FIG. 2 (b) from this state, the free end of the knuckle arm 2a is displaced in the same direction via the tie rod 11 and the connecting rod 12, and the knuckle 2 is Can be steered in one direction.
Due to the displacement of the pin 9 in the direction indicated by the arrow β accompanying this one-way steering, the connecting link members 7 and 8 are rotated in the direction indicated by the arrows γ and δ from the straight line alignment state shown in FIG. .
As a result, the attachment ends 7a, 8a of the connecting link members 7, 8 with respect to the first and second link members 3, 4 are brought close to each other and can be displaced in the vehicle front-rear direction, and the vehicle body side attachment end 3a of the first link member 3 can be displaced. However, it approaches the vehicle body side attachment end 4a of the second link member 4 which cannot be displaced.

  With this approach, the first link member 3 is rotated in the direction indicated by the arrow ε around the joint point with respect to the free end 4b of the second link member 4, and the knuckle attachment end 3b of the first link member 3 is in the vehicle width direction by τ. It will be going out.

When the steering rack 10 is stroked to the right as shown in FIG. 2 (c) from the non-steered state of FIG. 2 (a), the free end of the knuckle arm 2a is displaced in the same direction via the tie rod 11 and the connecting rod 12. The knuckle 2 can be steered in the other direction as indicated by α ′ together with the wheels.
Due to the displacement of the pin 9 in the direction indicated by the arrow β ′ accompanying this other direction turning, the connecting link members 7 and 8 are rotated from the straight alignment state shown in FIG. 2 (a) to the directions indicated by the arrows γ ′ and δ ′. Moved.
As a result, the attachment ends 7a and 8a of the connecting link members 7 and 8 with respect to the first and second link members 3 and 4 are brought close to each other in the same manner as in the unidirectional turning of FIG. The vehicle body side attachment end 3a of the displaceable first link member 3 approaches the vehicle body side attachment end 4a of the second link member 4 which cannot be displaced.

  Due to this approach, the first link member 3 is rotated in the direction indicated by the arrow ε around the joint point with respect to the free end 4b of the second link member 4 in the same manner as in the one-way turning of FIG. The knuckle attachment end 3b of the member 3 is moved outward in the vehicle width direction by τ as in the one-way steering in FIG. 2 (b).

In the present embodiment, the knuckle attachment end 3b of the first link member 3, and thus the knuckle 2 is moved outward in the vehicle width direction by τ at the time of steering in any direction. At the time of turning, it will leave the inner side of the tire wheel house outward in the vehicle width direction,
Even if the wheel is steered greatly in this direction and the front part or rear part of the wheel is greatly displaced inward in the vehicle width direction, the wheel can be prevented from interfering with the wheel house, and the maximum turning of the wheel can be avoided. The rudder angle can be increased.

Moreover, this effect can be achieved without relying on the inward expansion of the tire wheel house in the vehicle width direction or without depending on the deformation of the vehicle body frame. The effect can be achieved.
In addition, the above-described operational effect, that is, the operational effect that the maximum turning angle can be increased without sacrificing the space of the engine room or the like can be similarly achieved for both the inner and outer wheels in the turning direction.

In addition, the wheel steering device of the present embodiment is configured such that its component parts 3, 4, 7, 8, 11, 12 extend from the vehicle body frame 1 outward in the vehicle width direction or extend in this direction. Since it is provided in relation to the parts, the components of the wheel steering device do not interfere with the body frame 1 even when the wheel bounces due to the suspension stroke, and the body frame 1 is scraped to avoid this interference. There is no need.
Therefore, the cross-sectional area of the body frame 1 is not sacrificed, the cross-sectional area of the body frame 1 can be secured sufficiently large, and the rigidity of the suspension mounting portion of the body frame 1 can be sufficiently secured. It is possible to avoid a decrease in steering stability and a decrease in sound vibration performance such as road noise.

  In the above embodiment, the vehicle body side mounting end 3a of the first link member 3 is mounted to be displaceable in the vehicle longitudinal direction, and the vehicle body side mounting end 4a of the second link member 4 is made undisplaceable. 2 Even if the vehicle body side mounting end 4a of the link member 4 is mounted so as to be displaceable in the vehicle front-rear direction, and the vehicle body side mounting end 3a of the first link member 3 cannot be displaced, the same effect as described above can be achieved. it can.

However, in any case, as shown in FIG. 3 having the same link configuration as in FIG. 1, the vehicle body side attachment end 3a (or the second link member 4) of the first link member 3 attached so as to be displaceable in the vehicle longitudinal direction. The distance L1 between the vehicle body side mounting end 4a) and the connection node of the connection link member 7 or 8 with respect to the first or second link member 3 or 4, and both end connection points of the connection link member 7 or 8 Following the determination of the ratio with the distance L2, it is possible to freely adjust the amount of outing when turning the wheels.
As shown in FIG. 1 and FIG. 3, the larger the distance L1 is than the distance L2, the greater the amount of outing when the wheels are steered, but this value can be determined according to requirements at the vehicle design stage. Good.
Further, by making the distance L1 larger than the distance L2 as shown in FIG. 1 and FIG. 3, it is possible to avoid the connection link members 7 and 8 from interfering with the vehicle body frame 1 when the wheels are steered.

Further, as shown in FIG. 4 having the same link configuration as in FIG. 1, the distance L3 between the vehicle body side attachment end 3a of the first link member 3 and the second link member joint point, and the first link member 3 The distance L4 between the second link member joint node and the knuckle attachment end and the distance L5 between the two joint nodes of the second link member 4 may be the same.
In this case, as described above, the outward movement mechanism for displacing the wheel outward in the vehicle width direction at the time of steering is not correlated with the longitudinal movement of the knuckle 2, and the longitudinal force input to the wheel by braking / driving force or the like is not correlated. Since it does not become the force which operates a link mechanism, the longitudinal force to a wheel does not cause a toe angle change, and it can avoid the deterioration of steering stability.

FIG. 5 shows another embodiment of the wheel steering apparatus according to the present invention. In this embodiment, when the vehicle body side mounting end 3a of the first link member 3 is articulated so as to be displaceable in the vehicle front-rear direction, The articulation is performed with a configuration different from the embodiment described above.
That is, a guide block 13 that is displaceable in the vehicle longitudinal direction is provided along the vehicle body frame 1, and is restrained by guide means (not shown) in the vehicle width direction and the vehicle vertical direction.
Then, the vehicle body side attachment end 3a of the first link member 3 is connected to the guide block 13 so that the first link member 3 can swing in the vehicle front-rear direction.

Other than this, the link mechanism is the same as that of the above-described embodiment.
The wheel steering device of the present embodiment also operates in the same manner as described above, except that the configuration in which the vehicle body side mounting end 3a of the first link member 3 is articulated so as to be displaceable in the vehicle longitudinal direction is different. The effect can be achieved.

FIG. 6 shows a link mechanism similar to that in FIG. Shall.
That is, the tie rod 11 extending from the steering rack 10 is directly connected to the free end of the knuckle arm 2a, and the stroke of the steering rack 10 is directly input from the tie rod 11 to the knuckle arm 2a to rotate the knuckle 2 (wheel). Shall steer.
The connecting rod 12 has one end connected to the pin 9 and the other end connected to a position between both ends of the knuckle arm 2a.

The wheel steering device having such a configuration is also different from the case of FIG. 1 in that when the vehicle width direction stroke accompanying the steering is input to the pin 9, the stroke is transmitted via the knuckle arm 2a. It is possible to achieve the same effect as described above.
By the way, in this embodiment, the turning amount is determined by the effective length L6 of the knuckle arm 2a, and the distance L7 between the knuckle connecting point of the first link member 3 and the connecting point of the connecting rod 12 to the knuckle arm 2a, Since the amount of going out at the time of turning knuckle 2 is determined and they do not correlate, the decision of the turning amount by effective length L6 and the amount of going out at turning of knuckle 2 by distance L7 are set independently can do.
In this embodiment, since the tie rod 11 is directly connected to the free end of the knuckle arm 2a, the rigidity of the steering system can be kept high.

The connecting link members 7 and 8 are connected to the first and second link members 3 and 4 in place of the first and second links as shown in FIG. The members 3 and 4 can be articulated to the vehicle body side attachment ends 3a and 4a.
In this case, since no bending force is applied from the connecting link members 7 and 8 to the first and second link members 3 and 4, it is advantageous in terms of strength of the link mechanism, and the first and second of the connecting link members 7 and 8 are advantageous. The joint nodes for the link members 3 and 4 can be shared with the joint nodes of the first and second link members 3 and 4 for the arm member 5 and the vehicle body frame 1, thereby simplifying the structure and reducing the cost. Can do.

By the way, the second link member side end portion 8a of the connecting link member 8 is not connected to the vehicle body side mounting end 4a of the second link member 4 as shown in FIG. 7, but instead of the second link member 4 as shown in FIG. It can be separated from the vehicle body side attachment end 4a and can be articulated to the vehicle body frame 1. In this case as well, similar effects can be obtained.
In this configuration, the degree of freedom of the attachment position with respect to the second link member side end 8a of the connecting link member 8 is increased, and the selection range regarding the layout of the link mechanism is expanded.

FIG. 9 shows a wheel steering device according to still another embodiment of the present invention. In this embodiment, an outing mechanism that displaces the wheel outward in the vehicle width direction during steering is configured as follows.
That is, an actuator 21 is provided in place of the above-described connecting link members 7 and 8, and this actuator 21 has actuator rods 21a and 21b projecting from both ends respectively positioned near the vehicle body side attachment end (3a) of the first link member 3, The second link member 4 is provided between the first link member 3 and the second link member 4 so as to be connected to a position near the vehicle body side attachment end (4a).

Here, when the knuckle 2 is not steered, the actuator 21 is maintained at the maximum extension state shown in the figure, and the actuator rods 21a and 21b are retracted equally into the actuator body according to the steered operation as indicated by arrows, respectively, and contract. Shall be performed.
The actuator 21 is contracted by a controller 22, and information related to the stroke amount (steering amount) θ from the neutral position of the steering rack 10 is input to the controller 22.
Based on the stroke amount (steering amount) θ of the steering rack 10, the controller 22 controls the contraction of the actuator 21 so as to perform the same operation as described above with reference to FIG. The same effect as the example can be obtained.
In this embodiment, it is possible to construct an outing mechanism that displaces the wheel outward in the vehicle width direction at the time of turning without relying on a complicated mechanical link mechanism.

FIG. 10 shows a wheel steering apparatus according to still another embodiment of the present invention. In this embodiment, an outing mechanism for displacing the wheel outward in the vehicle width direction during steering is configured as follows.
That is, an actuator 23 is provided in place of the actuator 21 in FIG. 9, and the actuator 23 is fixed to the vehicle body frame 1, and the actuator rod 23b protruding from one end of the main body 23a is attached to the vehicle body side of the first link member 3. Connect to end 3a.
The vehicle body side attachment end 3a of the first link member 3 is guided by a guide member 24 fixed to the vehicle body frame 1 so as to be displaceable in the vehicle front-rear direction.

Here, when the knuckle 2 is not steered, the actuator 23 is kept in the most contracted state shown in the figure, and the actuator rod 23b advances from the actuator body 23a as shown by the arrow and performs an extension operation according to the steered state. .
The actuator 23 is contracted by a controller 25, and information related to the stroke amount (steering amount) θ from the neutral position of the steering rack 10 is input to the controller 25.

Based on the stroke amount (steering amount) θ of the steering rack 10, the controller 25 attaches the vehicle body side attachment end of the first link member 3 via the contraction control of the actuator 23 so as to perform the same operation as described above with reference to FIG. 3a is brought close to the vehicle body side attachment end 4a of the second link member 4.
Thus, in this embodiment, the same effects as those of the above-described embodiment can be obtained, and the vehicle width at the time of steering can be reduced at low cost without relying on a complicated mechanical link mechanism as in the case of FIG. It is possible to construct an outing mechanism that displaces outward in the direction.

FIG. 11 shows still another embodiment of the present invention. In this embodiment, an outing mechanism that displaces the knuckle 2 outward in the vehicle width direction at the time of turning has the following configuration.
That is, the pantograph link member 26 articulated between the knuckle attachment end 3b of the first link member 3 and the second link member articulation point 4b so as to swing in the vehicle longitudinal direction, and the vehicle longitudinal direction between both ends of the second link member 4. A pantograph link member 27 articulated in a swingable manner is provided.

The free ends of the pantograph link members 26 and 27 are connected to each other by a pin 28 so that the pantograph link members 26 and 27 can swing in the vehicle front-rear direction. The link member 3 and the second link member 4 constitute a pantograph mechanism.
Then, the link member 29 links the working end 26a far from the pin 28 of the pantograph link member 26 connected to the first link member 3 and the tie rod (11) connection point of the knuckle arm 2a.

When this link is connected, when the knuckle 2 is in the neutral (non-steered) state shown in the figure, the knuckle arm 2a and the link member 29 are aligned in a straight line in the vehicle longitudinal direction. During the two-way steering, the pantograph link member 26 is rotated in the direction of the arrow around the connection point with the first link member 3.
The rotation of the pantograph link member 26 is such that the vehicle body side mounting end 3a of the first link member 3 that is displaceable in the vehicle front-rear direction via the above-described pantograph link mechanism cannot be displaced in the vehicle front-rear direction. As a result, the knuckle attachment end (knuckle 2) of the first link member 3 can be displaced outward in the vehicle width direction.

As is clear from the above description in the present embodiment, the knuckle attachment end 3b of the first link member 3 and therefore the knuckle 2 is protruded outward in the vehicle width direction when turning in any direction. , The wheel will be away from the inner surface of the tire wheel house outward in the vehicle width direction at the time of the steering,
Even if the wheel is steered greatly in this direction and the front part or rear part of the wheel is greatly displaced inward in the vehicle width direction, the wheel can be prevented from interfering with the wheel house, and the maximum turning of the wheel can be avoided. The rudder angle can be increased.

Moreover, this effect can be achieved without relying on the inward expansion of the tire wheel house in the vehicle width direction or without depending on the deformation of the vehicle body frame. The effect can be achieved.
In addition, the above-described operational effect, that is, the operational effect that the maximum turning angle can be increased without sacrificing the space of the engine room or the like can be similarly achieved for both the inner and outer wheels in the turning direction.

In addition, the wheel steering device of the present embodiment is configured such that its component parts 3, 4, 26, 27, 29 extend from the vehicle body frame 1 outward in the vehicle width direction or extend in that direction. Since it is provided in connection with it, even when the wheel bounces due to the suspension stroke, the components of the wheel steering device do not interfere with the body frame 1, and it is necessary to scrape the body frame 1 to avoid this interference Absent.
Therefore, the cross-sectional area of the body frame 1 is not sacrificed, the cross-sectional area of the body frame 1 can be secured sufficiently large, and the rigidity of the suspension mounting portion of the body frame 1 can be sufficiently secured. It is possible to avoid a decrease in steering stability and a decrease in sound vibration performance such as road noise.

It is a top view which shows the wheel steering apparatus which becomes one Example of this invention. In the operation explanatory view of the wheel steering device, (a) is a plan view similar to FIG. 1 shown in a neutral state where the wheel is not steered, (b) is when the wheel is steered in one direction FIG. 2C is a plan view similar to FIG. 1 and shown in a steered state when the wheels are steered in the other direction. FIG. 2 is an explanatory diagram of dimensions of the wheel steering device shown in FIG. FIG. 2 is a dimension explanatory diagram of another part of the wheel steering device shown in FIG. It is a top view which shows the wheel steering apparatus which becomes the other Example of this invention. It is a top view which shows the wheel steering apparatus which becomes further another Example of this invention. It is a top view which shows the wheel steering apparatus which becomes another Example of this invention. It is a top view which shows the wheel steering apparatus which becomes another Example of this invention. It is a top view which shows the wheel steering apparatus which becomes the other Example of this invention. It is a top view which shows the wheel steering apparatus which becomes another Example of this invention. It is a top view which shows the wheel steering apparatus which becomes another Example of this invention.

Explanation of symbols

1 Body frame (body)
2 Knuckles
2a knuckle arm 3 first link member 4 second link member 5 arm member 6 pivot pin of second link member 7 connecting link member 8 connecting link member 9 connecting link member free end pivot pin
10 Steering rack (steering actuator)
11 Tie rod
12 Connecting rod
13 Information block
21 Actuator
22 Controller
23 Actuator
24 Guide members
25 Controller

Claims (12)

In a wheel steering device that steers wheels while displacing them outward in the vehicle width direction during steering,
A first link member and a second link member that extend outward from the vehicle body in the vehicle width direction and are swingable in the vehicle longitudinal direction and attached to the vehicle body,
A knuckle that rotatably supports the wheel is attached to the end of the first link member distant from the vehicle body side attachment end so that it can be steered.
A free end far from the vehicle body side attachment end of the second link member is connected between the vehicle body side attachment end and the knuckle attachment end of the first link member,
One of the vehicle body side attachment ends of the first link member and the second link member can be displaced in the vehicle front-rear direction,
In response to the steering from the neutral position of the knuckle, the vehicle body side mounting end of the first link member or the second link member that can be displaced in the vehicle longitudinal direction is connected to the second link member or the second link member that cannot be displaced in the vehicle longitudinal direction. A wheel steering apparatus comprising an outing mechanism that displaces the knuckle mounting end of the first link member toward the vehicle width side mounting end of the first link member and displaces the knuckle mounting end of the first link member outward in the vehicle width direction. In the wheel turning device according to claim 1,
The vehicle body side attachment end of the first link member or the second link member displaceable in the vehicle longitudinal direction is connected to the free end of the arm member attached to the vehicle body so as to be swingable in the vehicle longitudinal direction and displaced in the vehicle longitudinal direction. A wheel steering device characterized by being made possible. In the wheel steering device according to claim 1 or 2,
The outing mechanism includes a connecting link member articulated in a vehicle width direction between a vehicle body side attachment end of the first link member and a second link member articulation point, and a vehicle width direction between both ends of the second link member. A connecting link member articulated in a swingable manner,
The free ends of the connecting link members are connected to each other so that the connecting link members can swing in the vehicle width direction, and the vehicle width generated when the knuckle is steered to the connecting portion. A wheel turning device characterized by inputting a directional stroke. In the wheel steering apparatus according to claim 3,
The distance between the attachment end of the first link member or the second link member on the vehicle body side and the connection point of the connection link member with respect to the first link member or the second link member is defined as the distance of the connection link member. A wheel steering apparatus characterized in that it is longer than the distance between one link member or second link member side joint node and the free end. In the wheel steering device according to claim 1 or 2,
The outing mechanism includes a connecting link member that is connected to the vehicle body side mounting end of the first link member so as to be swingable in the vehicle width direction, and a joint member that is swingable in the vehicle width direction of the second link member. A connected link member,
The free ends of the connecting link members are connected to each other so that the connecting link members can swing in the vehicle width direction, and the vehicle width generated when the knuckle is steered to the connecting portion. A wheel turning device characterized by inputting a directional stroke. In the wheel steering device according to claim 1 or 2,
The outing mechanism includes a connecting link member articulated so as to be swingable in the vehicle width direction to the vehicle body side mounting end of the first link member or the second link member, the vehicle body side mounting end being displaceable in the vehicle longitudinal direction, A link member connected to the vehicle body so as to be swingable in the vehicle width direction at a position different from the vehicle body side attachment end of the first link member or the second link member;
The free ends of the connecting link members are connected to each other so that the connecting link members can swing in the vehicle width direction, and the vehicle width generated when the knuckle is steered to the connecting portion. A wheel turning device characterized by inputting a directional stroke. In the wheel turning device according to any one of claims 3 to 6,
A wheel steering apparatus characterized in that a steering actuator and a knuckle arm are connected to the free end interconnecting portions of the two connecting link members. In the wheel turning device according to any one of claims 3 to 6,
A wheel steering apparatus characterized in that a steering actuator is connected to a knuckle arm, and the knuckle arm is connected to a free-end interconnection portion of both the connecting link members. In the wheel steering device according to any one of claims 3 to 8,
The distance between the vehicle body side attachment end of the first link member and the point where the free end of the second link member is articulated,
The distance between the knuckle attachment end of the first link member and the point where the free end of the second link member is articulated, and
A wheel steering device characterized in that the distance between the vehicle body side attachment end of the second link member and the free end connected to the first link member is the same. In the wheel steering device according to claim 1 or 2,
The outing mechanism is constructed between the vehicle body side attachment end of the first link member and the position between the second link member joint points, and the position between the vehicle body side attachment end of the second link member and the first link member joint nodes. Composed of actuators,
A wheel turning device characterized in that the actuator is configured to perform stroke control in accordance with the turning of the knuckle. In the wheel steering device according to claim 1 or 2,
The outing mechanism is configured by an actuator that controls a stroke of the first link member or the second link member displaceable in the vehicle longitudinal direction in the vehicle longitudinal direction according to the steering of the knuckle. A wheel steering device characterized by this. In the wheel steering device according to claim 1 or 2,
The outing mechanism includes a pantograph link member articulated between a knuckle attachment end of the first link member and a second link member articulation point so as to be able to swing in the vehicle front-rear direction, and a vehicle front-rear direction swing between both ends of the second link member. A pantograph link member articulated in a movable manner,
The free ends of the pantograph link members are connected to each other so that the pantograph link members can swing in the vehicle front-rear direction, and the pantograph link member, the first link member, and the second link member are connected to each other. Configure the mechanism,
A first link member that is displaceable in the vehicle longitudinal direction between a working end far from the free end of the pantograph link member linked to the first link member and a knuckle arm when turning from a neutral knuckle position. Alternatively, the wheel steering device characterized in that the vehicle body side attachment end of the second link member is linked so that it is displaced toward the vehicle body side attachment end of the second link member or the first link member that cannot be displaced in the vehicle longitudinal direction. .

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