KR101382050B1 - Power steering system - Google Patents

Abstract

The present invention relates to a steering apparatus. Specifically, the provided power steering apparatus couples a steering pipe formed on a driving body as a supporting shaft of a base member to rotate the steering pipe by the driving force which is caused by the operation of the steering handle and is delivered to the steering pipe through a driving unit and a gear box, and includes a tie rod on either sides with an end coupled to the driving unit to be easily rotated by the connection shaft and another end coupled to a wheel housing be easily rotated to by the center shaft to rotate the wheel housing which couples the moving shaft to guide pipes on either sides of the supporting plate by the rotation of the driving unit.

Description

Power Steering System {POWER STEERING SYSTEM}

The present invention relates to a steering apparatus, and in particular, by combining the steering tube formed on the actuator with the support shaft of the pedestal to rotate by the power transmitted to the steering tube via the drive unit and the gearbox due to the steering wheel operation. One end portion is coupled to the rotation shaft by a connecting shaft and the other end is provided with wheel housings on both sides of which are coupled to the rotation shaft by the central shaft so that the flow shaft is moved to the guide tubes on both sides of the support plate by the rotation of the actuator. The angle of the wheel can be adjusted by rotating the wheel housing. The inner wheel in the direction in which the steering wheel is rotated is rotated at a large angle to rotate the wheel while drawing a small inner track while the outer wheel is rotated at a small angle. It rotates and draws a large outer trajectory and rotates to prevent slippage of inner wheels. It is possible to run smooth curve road by blocking vibration and noise that occurred, and by matching the center of rotation of the outer wheel rotated while drawing a small inner trajectory and the inner wheel rotated while drawing a large outer trajectory to the same point Since the radius of rotation can be reduced more than the steering device installed in the conventional vehicle, it is possible to rotate even in a narrow space. When designing a car, the width of the vehicle can be designed to be longer than the distance between the wheels or to be the same or shorter than the wheel width. It is possible to design a new type of steering system because it can be designed freely, and it is possible to execute the function as it is without installing the speed turn system attached to the tractor when it is applied to agricultural tractor. Savings can also be achieved and a simple steering station It has the advantage of less trouble caused by the configuration and easy maintenance even in the event of a failure, and it can be applied to agricultural machinery such as forklifts and tractors as well as automobiles. It relates to a steering device.

The configuration of a conventional general steering apparatus is shown in FIG.

The conventional configuration includes a drive unit 1 driven by a driving element such as a motor, a gear box 2 connected to the drive unit 1 and driven at a set speed, and output from the gear box 2. Tie rod (4) connecting the rack (3) to move left and right by the power, and the rack (3) and the wheel (5) for pushing or pulling the wheel by the left and right movement of the rack (3) It is a structure provided with.

In the conventional steering apparatus as described above, when the driver rotates the steering wheel (not shown), the driving unit 1 is driven to operate the gear box 2 to move the rack 3 in a direction intended by the driver.

Then, by the movement of the rack 3, the tie rods 4 on both sides rotate the wheel 5 at a constant angle a to steer.

However, the above conventional technology causes a problem when driving on a curved road.

That is, after the wheels 5 on both sides are rotated at the same angle, the inner wheel 5 rotates while drawing the inner trajectory IR as shown in FIG. 1 about the center of rotation CL1.

In addition, since the outer wheel 5 is rotated at the same angle a as the inner wheel 5, the outer wheel 5 rotates about the rotation center point CL2 at a different point from the inner wheel 5, so that the actual track JR Rotate while drawing.

However, since the two wheels cannot rotate while simultaneously drawing the inner trajectory IR and the actual trajectory IR, the outer wheel 5 is forcibly slid outward on the actual trajectory JR and the outer trajectory OR is forcibly performed. Will be rotated along.

As described above, when the outer trajectory OR is drawn while sliding on the actual trajectory JR, vibration is generated due to friction between the wheel 5 and the ground, and there is a problem that the noise is accompanied.

In addition, due to the vibration and noise generated during the curve rotation of the outer wheel (5) as described above, was always bound by the distance between the wheels (distance between the center of the front wheel and the center of the rear wheel) when designing the vehicle width (the front of the car) In general, it was common to design the distance between the left and right wheels shorter than the distance between the wheels.

Further, in the related art, since the design and fabrication of the front wheel and the rear wheel are made to the same length, the width of the design is limited and there is a problem that a new steering system does not appear.

In addition, the agricultural tractor is equipped with a double speed turn system to rotate the outer wheel of the rear axle when the curve is rotated. The above speed turn system is a high price of natural agricultural tractors because of the high price, the weight of the vehicle Since it increases the waste of fuel had a serious problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve such conventional problems,

When driving the curve, the inner wheel in the direction of steering wheel rotation is rotated at a large angle to rotate the small inner track, and the outer wheel is rotated at a small angle to rotate the large outer trajectory, so the inner wheel slips. It can prevent the vibration and noise generated during the curve, so that you can run the curve smoothly and match the center point of rotation of the outer wheel that is rotated while drawing a small inner trajectory and the inner wheel that is rotated while drawing a large outer trajectory at the same point. Because of this, the radius of rotation can be reduced more than the steering device installed in the conventional vehicle, so that it can be rotated in a narrow space, and the vehicle width is designed to be longer than the distance between the wheels or the same, New design of steering system because it can be designed in a short time When applied to agricultural tractors, it is possible to carry out the function without the need to install the double speed turn system attached to the tractor, so that the price of the tractor can not be increased and fuel saving effect can be obtained. It has the advantage of less occurrence of breakdown and easy maintenance even in case of failure, and it can be applied to agricultural machinery such as forklifts and tractors as well as automobiles, so that it can be widely used where power steering is needed. .

According to an aspect of the present invention,

By combining the steering tube formed on the actuator with the support shaft of the pedestal, it is rotated by the power transmitted to the steering tube via the driving unit and the gearbox due to the steering wheel's operation, and one end of the actuator is rotated by the connecting shaft. The other end is provided with two tie rods, which are coupled to each other for rotation by the central axis, and the wheel housing is rotated by the rotation of the actuator to rotate the wheel housing that couples the fluid shaft to the guide tubes on both sides of the support plate. By allowing the angle to be adjusted, the object of the present invention can be achieved.

According to the present invention, the inner wheel in the direction in which the steering wheel is rotated is rotated at a large angle to rotate a small inner trajectory and the outer wheel is rotated at a small angle to rotate a large outer trajectory when driving the curve. Since it prevents slipping of inner wheels, it has the effect of running smooth curve road by blocking vibration and noise generated during curve.

The present invention as described above has a rotation radius more than that of a conventional steering device installed in a vehicle by matching the center of rotation of the outer wheel rotated while drawing a small inner trajectory and the inner wheel rotated while drawing a large outer trajectory to the same point. Since it can be reduced, it is possible to rotate even in a narrow space.

In the present invention as described above, the vehicle width can be designed to be longer than the distance between the wheels or the same or shorter than the wheel width without regard to the wheel width and the vehicle width. Has an effect.

The present invention as described above has the effect that it is possible to achieve the fuel saving effect at the same time without having to increase the price of the tractor by enabling the function as it is, even if it is not equipped with a double speed turn system mounted on the tractor when applied to agricultural tractors. .

The present invention as described above has the advantage of less trouble caused by the configuration of a simple steering device and easy maintenance even in the event of a failure, and can be applied to agricultural machinery such as forklifts and tractors as well as automobiles, so power steering is required. Wherever there is a useful effect that can be widely used.

1 is a view showing for explaining the wheel trajectory of the conventional steering apparatus
2 is a view showing for explaining the configuration and operation of the conventional steering apparatus
Figure 3 is a view showing for explaining the wheel trajectory of the present invention steering device
Figure 4 is a side view showing for explaining the configuration of the steering apparatus of the present invention
Figure 5 is a plan view showing for explaining the configuration of the steering apparatus of the present invention
Figure 6 is a view showing for explaining the coupling relationship between the actuator, the support shaft, the tie rod of the steering apparatus of the present invention
7 is a view showing for explaining the operation of the actuator in the steering apparatus of the present invention;
Figure 8 is a view showing for explaining the action when the left turn of the steering device of the present invention
Figure 9 is a view showing for explaining the action during the right turn of the steering apparatus of the present invention

The construction of the present invention will be described in detail with reference to the accompanying drawings.
The actuator 101 is coupled to the steering tube 105 to the support shaft 106 of the pedestal 111 so as to be rotated by the power transmitted to the steering tube 105 via the drive unit and the gearbox due to the steering handle. )Wow,
By rotating the actuator 101, the wheel housing 115, which couples the flow shaft 114 to the guide tubes 113 on both sides of the support plate 112, is rotated to operate the angle of the wheel 116. Tie rods 103 on both sides that one end is coupled to the sieve 101 by a connecting shaft 102 for rotation, and the other end is coupled to the wheel housing 115 by a central shaft 104 for rotation.
The connecting shaft 102 of both sides coupling the tie rods 103 on both sides to the actuator 101 are coupled to the left and right symmetry around the vertical center line HC of the support shaft 106,
To make the distance between the center of the connecting shaft 102 and the center of the support shaft 106 on both sides that couple the tie rods 103 on both sides to the actuator 101,

When the actuator 101 rotates about the support shaft 106, the inner wheel 116 is increased by increasing the displacement amount of the connecting shaft 102 located inside the rotation direction of the actuator 101 (L2). The outer wheel 116 is smaller than the inner wheel 116 so that the rotational displacement of the connecting shaft 102, which is rotated at a large angle A 'and positioned outside the rotational direction of the actuator 101, is small (L1). It is the structure provided so that it may rotate at the angle A. FIG.
In addition, the center of rotation CL of the inner wheel 116 rotated by the actuator 101 and the center of rotation CL of the outer wheel 116 are the same points.

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Hereinafter, the operation of the present invention will be described.

3 is a view showing a wheel trajectory of the present invention steering apparatus, Figure 4 is a side view showing for explaining the configuration of the present invention steering device, the inner wheel 116 and the outer wheel (steering in the present invention ( Since the angle 116 rotates differently, the center of rotation CL of the inner wheel 116 and the outer wheel 116 becomes the same point when the curve is rotated.

Therefore, the inner wheel 116 is a small rotation while drawing the inner trajectory (IR) around the center of rotation (CL) and the outer wheel 116 also has an outer trajectory (OR) around the center of rotation (CL) As you draw, you will make a big turn.

That is, as shown in FIGS. 5 and 6, the actuator 101 coupled to the support shaft 106 of the pedestal 111 has symmetrical left and right connecting shafts 102 on both sides of the vertical center line HC. Due to the wide or narrow distance of these two connecting shafts 102 can move the tie rods 103 on both sides to a greater distance and less distance, so that both of the wheel housing 115 and the wheel 116 You can adjust the angle.

In addition, by increasing or decreasing the angle between the center of the connecting shaft 102 on both sides and the center of the support shaft 106 coupling the tie rods 103 on both sides to the actuator 101, the tie rods 103 on both sides. ) Can be moved to a greater distance and less distance will be able to adjust the angle of both the wheel housing 115 and the wheel 116.

By operating the steering wheel (not shown) in a state where both side connecting shafts 102 of the actuator 101 coupled to the supporting shaft 106 are positioned at the same angle and the same distance with respect to the supporting shaft 106 as described above. Due to this, power is transmitted to the steering tube 105 via the driving unit and the gearbox (not shown).

When the actuator 101 is rotated from the imaginary line position of FIG. 7 to the solid line position by the power transmitted to the steering tube 105, the connecting shafts of both sides in the actuator 101 ( The distance that 102 moves in rotation becomes the same.

However, the actual displacement amount of the coupling shaft 102 coupled to the inner side in the rotational direction of the actuator 101 has a large displacement amount of "L2" while the actual displacement displacement of the coupled shaft 102 coupled to the outer side in the rotational direction. Has a small displacement amount of "L1".

 The tie rod 103 coupled to the connecting shaft 102 in the rotational direction of the actuator 101 as described above pulls the wheel housing 115 connected to the central shaft 104 and the wheel housing 115 is As shown in FIG. 8, the inner wheel 116 is rotated by a large angle with the flow shaft 114 coupled to the guide tube 113 of the support plate 112 by “A ′”.

In addition, the tie rod 103 coupled to the connecting shaft 102 of the outer side of the actuator 101 is in a state of briefly pushing the wheel housing 115 connected to the central shaft 104 and the wheel housing 115. ) Is rotated by "A" as shown in Figure 8 with the flow shaft 114 coupled to the guide tube 113 of the support plate 112 to rotate the outer wheel 116 at a small angle.

Therefore, since the center of rotation CL of the inner wheel 116 rotated at a large angle A 'and the outer wheel 116 rotated at a small angle A are aligned to be the same point, the curve length is reduced. You can run smoothly without noise or vibration.

When the steering wheel is operated in the opposite direction, as shown in FIG. 9, since the inner wheel 116 in the rotational direction is always rotated at an angle larger than the outer wheel 116, the steering wheel rotates at a large angle A. FIG. Since the center of rotation (CL) of the inner wheel 116 in a closed state and the outer wheel 116 in a state rotated at a small angle A 'is aligned to be the same point, it is possible to smoothly run the curve.

101 actuator 102 connection shaft
103-tie rod 104-center shaft
105-steer tube 106-support shaft
111-base 112-support plate
113-Guide 114-Flow Shaft
115-wheel housing 116-wheel

Claims (5)

The actuator 101 is coupled to the steering tube 105 to the support shaft 106 of the pedestal 111 so as to be rotated by the power transmitted to the steering tube 105 via the drive unit and the gearbox due to the steering handle. )Wow,
By rotating the actuator 101, the wheel housing 115, which couples the flow shaft 114 to the guide tubes 113 on both sides of the support plate 112, is rotated to operate the angle of the wheel 116. Tie rods 103 on both sides that one end is coupled to the sieve 101 by a connecting shaft 102 for rotation, and the other end is coupled to the wheel housing 115 by a central shaft 104 for rotation.
The connecting shaft 102 of both sides coupling the tie rods 103 on both sides to the actuator 101 are coupled to the left and right symmetry around the vertical center line HC of the support shaft 106,
To make the distance between the center of the connecting shaft 102 and the center of the support shaft 106 on both sides that couple the tie rods 103 on both sides to the actuator 101,
When the actuator 101 rotates about the support shaft 106, the inner wheel 116 is increased by increasing the displacement amount of the connecting shaft 102 located inside the rotation direction of the actuator 101 (L2). The outer wheel 116 is smaller than the inner wheel 116 so that the rotational displacement of the connecting shaft 102, which is rotated at a large angle A 'and positioned outside the rotational direction of the actuator 101, is small (L1). Power steering device characterized in that it is provided so as to rotate at an angle (A).
The method according to claim 1,
Power steering device, characterized in that the center of rotation (CL) of the inner wheel (116) and the center of rotation (CL) of the outer wheel (116) to be steered and rotated by the actuator 101 is the same point.
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