JPH10287267A - Vehicle steering device by front axle and rear axle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the steering device of a one-man electric vehicle or the like by performing a bias traveling and a turning traveling similarly to the walking of a person by a front and a rear axle to which driving mechanisms such as steering motors arranged in the front and rear, respectively, and which are linked to normal and reverse proportional driven control link and laterally turned by a desired angle proportionally or reverse proportionally. SOLUTION: In this device, each of front and rear links 16, 17 is locked to a linkage plate 15 when a link operating handle is turned left, the linkage plate 15 is made free to a frame, and the front and rear axles 2, 3 are proportionally rotated through front half and rear half linkage rods 20, 21 and the linkage plate 15. When the link operating handle is turned right, the front and rear links 16, 17 are made free from the linkage plate 15, the linkage plate 15 is locked to the frame, and the rotation of the front and rear links 16, 17 for rotating the front and rear axles 2, 3 to a reverse angle through front and rear reverse angle proportional links 23, 24 are transmitted to the front half and rear half linkage rods 20, 21 to proportionally rotate the front and rear axles to the reverse angle, whereby a vehicle can be freely turned and traveled similar to the walk of a person.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for turning a front axle and a rear axle in the same or opposite directions in relation to each other so as to steer a vehicle at an acute angle or an obtuse angle.

[0002]

A typical vehicle on a narrow road without a median strip is meandering and passing each other as shown by a solid line and a dashed line in FIG. However, in the case of a pedestrian, as shown by the solid line and the one-dot chain line in FIG.

[0003] Further, when climbing a steep hill, even if an ordinary vehicle climbs the hill by S-shaped driving, there is a part where it is straightened on the slope by turning back, so that the climbing is forcible. If it is possible to climb up a zigzag like a pedestrian, traveling uphill will be remarkably easy.

[0004] Further, even if the operation angle motor is driven to the same standard due to the axial load applied to the front axle and the rear axle and the reaction force received from the road surface during traveling, the alignment of the front axle and the rear axle is not correct. Is generated.

[0005] Regarding running, a relay rod may be connected to a skew in which the front axle and the rear axle have the same angle in proportion to each other, but the relay rod may be connected. Can not make left turn, right turn and U-turn. To do this requires a reverse angle relay rod that operates either axle in proportion to the reverse angle in the opposite direction.

[0006] In addition, even on a rough road having a lot of unevenness, if the vehicle can travel straight on a sloping road, it is possible to select a good portion of the road surface and travel the shortest. Thus, the difference between meandering and straight traveling appears greatly in the mileage of the day, eliminating useless traveling.

The present invention has been made with an emphasis on the above drawbacks, and has mainly attempted to improve a steering device for a vehicle such as a one-seat electric vehicle.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a front axle and a rear axle arranged in front and rear, and a driving mechanism such as a steering motor is associated with each of them. And the rear axle are linked by a control link having a proportional driven mechanism and an inverse proportional driven mechanism, turning the front axle and the rear axle proportionally or inversely proportionally, and performing skew running and turning running as freely as human walking. A vehicle steering device having a front axle and a rear axle, which is capable of changing directions and traveling.

The front axle and the rear axle are pivotally supported in the front and rear of the frame, and a pinion mounted on the rotating shaft of the steering motor for the front axle is meshed with the front steering gear of the front axle, and mounted on the rotating shaft of the steering motor for the rear axle. The pinion may be meshed with a rear steer link gear of the rear axle, and the respective motors may be provided so that the front axle and the rear axle can be steered.

In the control link, a linking plate is provided on a guide frame provided in parallel on both sides of the frame so as to be movable back and forth, and the front link and the rear link are separated on the linking plate by a required distance back and forth. And each base end is pivotally supported on the link plate with a pivot, a front link corresponds to a rear link, a front link rod is connected to the front link, and a rear link rod is connected to the rear link. A front axle and a rear axle are linked to each other, and arms are respectively protruded at required side edges of the front link and the rear link near the base end, and the front link and the rear link are located on the link plate. A reference guide hole is opened in the middle transverse direction, and the base ends of the front / reverse proportional link and the rear / reverse proportional link are slidably engaged with the reference guide hole, and the front end of the front / reverse proportional link is moved forward. The arm of the front link, the tip of the rear opposite angle proportional link respectively coupled to the arm of the rear link, the pivotal movement around a base end of the front link and the rear link may be provided to be inversely proportional to the angle.

[0011] The control link is a front link by a handle,
When the lock mechanism for the rear link and the link plate is operated to the frame and the handle is turned to one side, the front link and the rear link are locked to the link plate, and the link plate is set free to the frame. The axle and the rear axle are connected in the front half
When the handle is turned to the other side, the front link and the rear link are released from the link plate, the link plate is locked to the frame, and the front axle is The rotation of the front / rear link, which turns the rear axle with the rear axle at a reverse angle via a front / rear reverse angle proportional link, is transmitted to the front half link rod and the rear half link rod, and the rear axle may be provided so as to rotate in proportion to the reverse angle. .

The lock mechanism of the control link with respect to the front link, the rear link, and the frame of the link plate rotates the lower end of the handle via a link rod, and connects an operating shaft integrally attached to the lever to the link plate. In the sliding direction, the frame is rotatably supported at a fixed position with the frame, and a related portion of the operation shaft is formed as required, and the first lock claw corresponding to the front link and the second lock claw corresponding to the rear link are connected to the operation shaft. The first lock pawl and the second lock pawl are linked forward when the handle is pivoted to one side while being movably supported in the direction of movement of the link plate while being freely movable in the rotation direction. When the handle is turned to the other side, the opposite lower half is provided so as to be free from the linkage plate provided on the frame. 1 locking pawl and engaged with the interconnector plate stopper provided on the frame of each lower half portion from the shaft support of the second lock pawl to lock, the upper half of the respective shaft support,
The front link and the rear link may be provided so as to be free from each other.

A steering motor for a front axle and a steering motor for a rear axle having a left steering switch, a right steering switch, a skew / turn switch, a first auxiliary switch and a second auxiliary switch for rotating the front axle and the rear axle. May be provided to operate the vehicle.

When the front axle or the rear axle reaches the maximum turning angle, the electric circuit is opened by operating the limit switch before hitting the stopper, and the steering motor for the front axle or the steering motor for the rear axle is automatically stopped. It may be provided.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A front axle and a rear axle are pivotally supported in the front and rear of a frame, and a pinion attached to a rotating shaft of a steering motor for a front axle is meshed with a front steering gear of the front axle, and a steering ring motor for a rear axle is provided. The pinion attached to the rotating shaft meshes with the rear steer link gear of the rear axle, and the respective motors are provided so that the front axle and the rear axle can be steered. A linking plate is installed on the guide frame provided parallel to the left and right sides of the frame in such a way that it can be pivoted at the required angle. And each base end is pivotally connected to the link plate with a pivot. The front link and the rear link correspond to each other, a front half link rod is connected to the front link, and a rear link rod is connected to the rear link, and the front axle and the rear axle are linked, and the front link and the rear link are linked. Arms are protruded from the corresponding side edge near the base end by a required length, and a reference guide hole is opened on the link plate in a direction transverse to the middle between the front link and the rear link. The bases of the front / reverse proportional link and the rear / reverse proportional link are slidably engaged with each other, and the distal end of the front / reverse proportional link is connected to the arm of the front link, and the distal end of the rear / reverse proportional link is connected to the rear link. The front and rear axles are connected to the respective arms so that the rotation of the front link and the rear link around the base ends are proportional to the reverse angle. Free to Steering apparatus according to the front and rear axles, characterized in that running in diverting the.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a vehicle steering system 1 using a front axle and a rear axle according to an embodiment of the present invention. A front steering system in which a steering motor 7 for a front axle and a steering motor 8 for a rear axle are provided on a frame 4 and a pinion 9 attached to a rotating shaft of the steering motor 7 for a front axle is attached to the front axle 2. Meshes with the gear 10,
A pinion 11 attached to a rotating shaft of a steering motor 8 for the rear axle is meshed with a rear steer link gear 12 attached to the rear axle 3 so that the steering of the front axle 2 and the rear axle 3 is performed by the respective motors 7 and 8. Provided.

Reference numeral 13 denotes a control link, which engages the guide plates 14a, 14b provided on both sides of the frame 4 in parallel with the left and right side edges 15a, 15b to move the link plate 15 so as to be movable back and forth. Then, the front link 16 and the rear link 17 are separated from each other at a required distance in the front and rear direction on the link plate 15, and their base ends are connected to the link plate 15 by pivots 18, 18.
19, the front link 16 and the rear link 17 correspond sideways, and the front link 16 has a front half link rod 20 at its tip and the rear link 17 has a rear half link rod 2 at its tip.
1 are connected to each other, the front axle 2 and the rear axle 3 are linked, and further, arms 16a and 17a are protruded from the front link 16 and the rear link 17 on the corresponding side edges near the base end.

On the link plate 15, a reference guide hole 22 is opened in a direction transverse to the middle between the front link 16 and the rear link 17, and the reference guide hole 22 has a front / reverse proportional link 23 and a rear / reverse angle. The base end of the proportional link 24 is slidably engaged with the front end of the arm 16 of the front link 16.
a and the distal end of the rear inverse proportional link 24 are connected to the arm 17a of the rear link 17, respectively.
Are provided so that the rotation about the base end is proportional to the reverse angle.

Reference numeral 25 denotes a link operating handle which operates the lock mechanism 26 of the front link 16, the rear link 17 and the link plate 15 with respect to the frame 4, and turns the front link 16 when the link operating handle 25 is turned to the left. 1
6 and the rear link 17 are locked to the link plate 15, the link plate 15 is free with respect to the frame 4, and the front axle 2 and the rear axle 3 are connected to the front half link rod 20, the rear half link rod 21 and the link. Rotate proportionally via the plate 15.

On the other hand, when the link operating handle 25 is turned to the right, the front link 16 and the rear link 17 are released from the link plate 15, the link plate 15 is locked to the frame 4, and the front axle 2 and The rotation of the front and rear links 16 and 17, which rotate in the reverse direction with the rear axle 3 via the front and rear reverse angle proportional links 23 and 24, is transmitted to the front half link rod 20 and the rear half link rod 21, and the rotation is proportional to the reverse angle. Move.

The lock mechanism 26 pivots a lever 28 via a connecting rod 27 at the lower end of a link operating handle 25, and the inner operating shaft 2 attached integrally with the lever 28.
9 is rotatably supported at a fixed position with the frame 4 in the sliding direction of the linking plate 15.
9, the first lock pawl 30 corresponding to the front link 16 and the second lock pawl 31 corresponding to the rear link 17 can be freely driven in the rotation direction of the inner operation shaft 29, and The first lock claw 30 and the second lock claw 31 are movably supported in the movement direction of the link plate 15 and the link operation handle 25 is turned to the left.
The upper half portions 30a and 31a from the respective shaft support portions are connected to the first slit 32 and the second slit 3 provided in the link plate 15.
3 is inserted into the front link 16 and the rear link 17 from below, between the front link stopper 34 and the rear link stopper 35 provided in parallel with the front link 16 and the rear link 17, respectively. , Lower half 30 opposite
b, each end of the lower half 31b is provided so as to be free from the link plate stoppers 36, 37 provided on the frame 4.

When the link operation handle 25 is rotated to the right side, the first lock claw 30 and the second lock claw 3
The front ends of the lower halves 30b, 31b from the respective shaft supports are engaged with and locked by the link plate stoppers 36, 37 provided on the frame 4, and the upper halves 30a, 31 from the respective shaft supports.
“a” is provided on the front link 16 and the rear link 17 so as to be free from the front link stopper 34 and the rear link stopper 35 provided in parallel with their respective distal ends being separated.

The first lock claw 30 and the second lock claw 31
Are integrally provided by an outer hollow operation shaft 38.
Numerals 39 and 40 are bearing plates attached to the lower surface of the link plate 15. The first lock claw 30 and the second lock claw 30
The outer surfaces of the lock claws 31 are connected to each other, and the first lock claws 30 are provided so as to be linked to the link plate 15 without being connected to the first slits 32 and the second lock claws 31 to the second slits 33. Is also good.

As described above, the left and right steering switches S1 and S2 for operating the front axle steering motor 7 and the rear axle steering motor 8 for rotating the front axle 2 and the rear axle 3 as described above. Although not shown, the range changeover switch S3, the first auxiliary switch SX1, and the second auxiliary switch SX2 are provided on an armrest disposed on the left side of the passenger seat, and are operated with the left hand. The steering left switch S1 and the steering right switch S2 are four-pole double-sided changeover switches,
Two are installed on the left and right. Although not shown, these switches for various operations are preferably provided on the left armrest.

When there is no operation, the respective levers stand upright and all the terminals are turned off. When the left lever is tilted to the left, the left steering lever S1 inputs the two poles on the right side, and conversely shifts the left lever to the right. When defeated, the two poles on the left input. The same applies to the steering right switch S2. When the right lever is tilted to the left,
When the two poles on the right input and the right lever is tilted to the right,
The two poles on the left input. When the lever is tilted forward, the two poles on the rear side are input to the skew / turn range changeover switch S3, and the connected state is maintained even if the hand is released. When the lever is tilted backward, the two poles on the front side are input, and the connected state is maintained even if the hand is released. First auxiliary switch S
X1 and the second auxiliary switch SX2 form a circuit of two poles when manually pushed.

The steering left switch S1, the steering right switch S2, the skew / turn range switch S3 and the first
In addition to the auxiliary switch SX1 and the second auxiliary switch SX2, as shown in FIG.
Open at maximum left and right angles, closed at other angles, front left switch F1 and front right switch F2, front axle 2 open at straight ahead position, otherwise closed at front center left switch FC1 and front The center right switch FC2 and the rear axle 3 are open at the maximum left and right angles, and otherwise closed, the rear left switch B1, the rear right switch B2, and the rear axle 3 are opened at the straight-ahead position. The rear center left switch BC1 and the rear center right switch BC2 which are closed in other places are arranged on the frame side.

Then, as shown in FIG. 15, diodes FD1, FD2, BD1, and BD2 are connected in parallel, respectively, and each is connected in series to the steering motor 7 for the front axle and the steering motor 8 for the rear axle. I have.

The upper two poles of the left steering switch S1 and the right steering switch S2 steer the front axle 2, and the lower two poles steer the rear axle 3 via the skew / turn range changeover switch S3. Corner.

With the skew / turn range changeover switch S3 tilted forward and connected to the skew range circuit, the front axle 2 and the rear axle 3 are operated at the same cut angle.
When it is tilted rearward to be connected to the turning range circuit, the rear axle 3 operates at the reverse angle with respect to the angle of the front axle 2.

That is, with the skew / turn range switch S3 tilted forward and connected to the skew range circuit,
When the left steering switch S1 is tilted to the left, the front axle 2 and the rear axle 3 operate at the left turning angle, and when the hand is released, the turning angle is held at that point, and the left turning angle is maintained at the held turning angle. , And the maximum angle of cut (45 °)
, The front left switch F1 will automatically circuit,
The power is turned off, the steering stops, and the state is maintained.

Next, when the left steering switch S1 is tilted to the right, the steering is reversed, and the vehicle returns to straight ahead. Then, the front center left switch FC1 is opened, the power is automatically turned off, and the steering is stopped.

Next, when the right steering switch S2 is tilted to the right, the steering angle is opposite to the turning angle when the left steering switch S1 is tilted to the left. Return to straight ahead. (Each front right switch F2 and front center right switch FC2 operate)

Next, a skew / turn range changeover switch S3
When the steering left switch S1 is tilted to the left while the switch is tilted backward and connected to the turning range circuit, the front axle 2
Is operated at the left turning angle and the rear axle 3 is operated at the right cutting angle, so that both axles have an inverted eight-shape, and it is possible to perform a left turn, a left turn, a U-turn and a sharp turn. When the left control switch S1 is tilted to the right, the front axle 2
And the rear axle 3 is returned to the straight traveling. When the right steering switch S2 is tilted rightward, the steering angle of the steering left switch S1 is exactly opposite to that of the left steering switch S1, so that the front axle 2 and the rear axle 3 have a figure of eight, making a right turn U right turn and a sudden turn. Operation such as turning is enabled.

When the control right switch S2 is tilted to the left, the vehicle returns to the straight line. Even when connected to this turning range circuit, the front left switch F1, the front right switch F2, the front center left switch FC1, the front center right switch FC2, the rear left switch B1, the rear right switch B2, the rear center left switch BC1, and the rear center The right switch BC2 operates at a required position, and the front axle 2 and the rear axle 3 operate normally.

[0035]

As described above, according to the present invention, since the front axle and the rear axle are related by the control link, they can be operated in proportion or in inverse proportion to perform automatic steering. In addition, since the vehicle can perform sloping traveling and turning traveling, it is possible to freely change the direction and travel as in the case of human walking.

If the front left axle or the rear right axle reaches the maximum turning angle and stops when the front left axle or the rear right axle reaches the maximum angle of cut, the steering motor for the front axle or the steering motor for the rear axle burns out. Although electric power is wasted, the electric circuit is opened and automatically stopped because the limit switches are provided in each case.

Further, in the structure of the control link, when the vehicle is traveling straight, the lock change between the skewing and the turning is performed, so that the lock can be easily changed without depending on the eyes and intuition. Tilt to the left and then tilt the right steering switch to the right to operate the left steering switch and right steering switch. It is possible.

[Brief description of the drawings]

FIG. 1 shows a schematic overall arrangement of a vehicle steering system using a front axle and a rear axle according to the present invention, in which a front link and a rear link are fixed to a link plate, and the link plate is slid with respect to a frame; FIG. 5 is a plan view illustrating a state in which a rear axle is rotated in proportion to a left turning angle.

FIG. 2 is a plan view for explaining a state of a right turning angle.

[FIG. 3] Similarly, the front link and the rear link are free to the link plate, the link plate is fixed to the frame, the front axle and the rear axle are rotated in inverse proportion, and a plane explaining the state of the left turning angle is shown. FIG.

FIG. 4 is a plan view illustrating a state in which a front axle and a rear axle are turned in inverse proportion to each other and a right turning angle is obtained.

FIG. 5 is a plan view showing an example of an embodiment of a main part of a vehicle steering device using a front axle and a rear axle according to the present invention.

FIG. 6 is a plan view showing an example of a front link, a rear link, a link plate, and a lock mechanism of a front and rear axle steering device according to the present invention.

FIG. 7 is an enlarged sectional view showing a link structure of a front link along the line AA in FIG. 6;

FIG. 8 is a partial plan view illustrating the operation of first and second lock claws in the lock mechanism.

FIG. 9 is a partial side view for explaining a linked state between the link operation handle and the inner operation shaft.

FIG. 10 is a partial side view for explaining a linked state between a first lock claw and an inner operation shaft.

FIG. 11 is a partial side view for explaining a linked state of the second lock claw, the inner operation shaft, and the outer hollow operation shaft.

FIG. 12 is a plan view of the link plate alone.

FIG. 13 is a plan view showing another embodiment of an inverse proportional rotation mechanism of a front link and a rear link.

FIG. 14 is a plan view showing an example of an arrangement of limit switches that come into contact with and separate from a front axle and a rear axle.

FIG. 15 is an electric circuit diagram of a vehicle steering device using a front axle and a rear axle according to the present invention.

Similarly, when the electric circuit of the vehicle steering device of the present invention is connected to the skew range, the left steering switch is turned to the left, and the power supply is connected to the front axle steering motor and the rear axle steering motor. FIG.

FIG. 17 Similarly, when the electric circuit is connected to the skew range circuit, tilt the left steering switch to the right, connect the power supply to the front axle steering motor and the rear axle steering motor, and go straight through the front axle and the rear axle. FIG. 9 is a partial circuit diagram showing a state where the operation returns to the state of FIG.

FIG. 18 is a partial circuit diagram showing the state of connection between the power supply and the front axle steering motor and the rear axle steering motor when the electric circuit is connected to the skew range circuit, by turning the right steering switch to the right. .

FIG. 19 is a partial circuit diagram showing a state in which, when the electric circuit is connected to the skew range circuit, the right steering switch is turned to the left and the front axle and the rear axle are returned to straight ahead.

FIG. 20 is a diagram showing a connection state between the power supply and the steering motor for the front axle and the steering motor for the rear axle when the electric circuit of the vehicle steering system according to the present invention is connected to the turning range circuit by turning the left steering switch to the left. FIG.

FIG. 21 Similarly, when the electric circuit is connected to the turning range circuit, the left steering switch is turned to the right,
FIG. 4 is a partial circuit diagram showing a state in which a front axle and a rear axle return to straight traveling.

FIG. 22 is a partial circuit diagram showing a connection state between a power supply, a front axle steering motor and a rear axle steering motor when the electric control circuit is turned to the right when the electric circuit is connected to the turning range circuit.

FIG. 23 is a partial circuit diagram showing a state in which, when the electric circuit is connected to the turning range circuit, the right steering switch is turned to the left, and the front axle and the rear axle return to straight traveling.

FIG. 24 is a plan view showing a running locus when a general car travels on a narrow road without a center line.

FIG. 25 is a plan view showing a walking locus when pedestrians cross on narrow roads.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Vehicle steering device by front axle and rear axle 2 Front axle 3 Rear axle 4 Frame 5 Axis 6 Axis 7 Front axle steering motor 8 Rear axle steering motor 9 Pinion 10 Front steering gear 11 Pinion 12 Rear steering gear 13 Control link 14a Guide 14b Guide 15 Linkage plate 15a Side edge 15b Side edge 16 Front link 16a Arm 17 Rear link 17a Arm 18 Axis 19 Axis 20 Front half linkage rod 21 Rear half linkage rod 22 Reference guide hole 23 Front reverse angle proportional link 24 Rear Reverse angle proportional link 25 Link operation handle 26 Lock mechanism 27 Linking rod 28 Lever 29 Inner operation shaft 29a Related part 30 First lock claw 30a Upper half 30b Lower half 3 1 Second Lock Claw 31a Upper Half 31b Lower Half 32 First Slit 33 Second Slit 34 Front Link Stopper 35 Rear Link Stopper 36 Linkage Plate Stopper 37 Linkage Plate Stopper 38 Outer Hollow Operating Shaft 39 Bearing Plate 40 Bearing Plate S1 Steering Left switch S2 Steering right switch S3 Skew / turn range switch SX1 First auxiliary switch SX2 Second auxiliary switch

Claims (7)

[Claims] 1. A front axle and a rear axle are arranged in front and back, and a driving mechanism such as a steering motor is associated with each of them, and they are provided so as to be capable of turning at a required angle on the left and right, and the front axle and the rear axle are proportionally driven and inversely driven. Linked by a control link with a mechanism, turning the front axle and rear axle proportionally or inversely proportional,
A vehicular steering system using a front axle and a rear axle, which performs skew traveling and turning traveling to freely change the direction and travel as human walking. 2. A front axle and a rear axle,
The pinion, which is pivotally supported in the front and rear of the frame and is attached to the rotating shaft of the steering motor for the front axle, meshes with the front steering gear attached to the front axle,
The pinion attached to the rotating shaft of the steering motor for the rear axle meshes with the rear steer link gear attached to the rear axle, and the front axle is
2. The vehicle steering apparatus according to claim 1, wherein the rear axle is provided with a steering angle. 3. The control link is provided with a link plate movably back and forth on guide portions provided in parallel on both sides of the frame, and a front link and a rear link are provided on the link plate at a required distance back and forth. , And each base end is pivotally supported on the link plate by a pivot.The front link and the rear link correspond to each other, and the front link is connected to the front half link rod, and the rear link is connected to the rear link rod. The front axle and the rear axle are linked to each other, and the front link and the rear link are each provided with an arm at a corresponding side edge of the front link and the rear end near the base end, and the front link and the rear link are provided on the link plate. A reference guide hole is opened in the transverse direction between
The base ends of the front / reverse proportional link and the rear / reverse proportional link are slidably engaged with this reference guide hole, and the distal end of the front / reverse proportional link is connected to the arm of the front link and the rear / reverse proportional link. The front end is connected to the arm of the rear link, and the rotation of the front link and the rear link around the base end is proportional to the reverse angle. Vehicle steering system with front and rear axles. 4. The control link operates a lock mechanism for a front link, a rear link and a link plate with a frame by a handle, and locks the front link and the rear link to the link plate when the handle is turned to one side. When the link plate is free with respect to the frame, the front axle and the rear axle are proportionally rotated via the front half link rod, the rear half link rod and the link plate, and when the handle is turned to the other side, The front link and the rear link are released from the link plate, the link plate is locked to the frame, and the front and rear links that rotate the front axle and the rear axle to opposite angles via the front / rear inverse proportional link are rotated in the first half. That it is provided so as to be transmitted to the part linkage rod and the rear half linkage rod, and to rotate in proportion to the opposite angle. Claims 1 and 2
A vehicle steering system using the front axle and the rear axle according to claim 3. 5. The locking mechanism of the control link with respect to the front link, the rear link, and the frame of the link plate, wherein the lower end of the handle is turned by a lever via a link, and an operation shaft integrally attached to the lever is provided. A first part which is rotatably supported at a fixed position with the frame in the sliding direction of the linking plate, and has a necessary portion of the operation shaft formed corresponding to the front link.
The lock pawl and the second lock pawl corresponding to the rear link are freely movable in the rotation direction of the operation shaft, and are movably supported in the movement direction of the link plate. The upper half of each of the first lock claw and the second lock claw is engaged with the front link and the rear link so as to be lockable, and the opposite lower half is separated from the link plate provided on the frame so as to be free. When the handle is turned to the other side, the lower half of each of the first lock pawl and the second lock pawl from each shaft support engages with and locks the linkage plate stopper provided on the frame. The upper half portion of each of the pivot portions is provided so as to be free with the front link and the rear link separated from each other.
A vehicle steering system using the front axle and the rear axle according to claim 3 or 4. 6. A steering left switch, a steering right switch,
It has a skew / turn switch, a first auxiliary switch, and a second auxiliary switch, and is operated by operating a front axle steering motor and a rear axle steering motor for rotating the front axle and the rear axle. Claim 1, Claim 2, Claim 3, Claim 4
A vehicle steering system according to claim 5, wherein the front axle and the rear axle are used. 7. When the front axle or the rear axle reaches the maximum turning angle, the electric circuit is opened by operating the limit switch before hitting the stopper, and the steering motor for the front axle or the steering motor for the rear axle is automatically stopped. A vehicle steering system comprising a front axle and a rear axle.