KR102483730B1 - Electric three wheeled vehicle for improving steering stability - Google Patents

Abstract

The present invention relates to an electric tricycle with improved steering stability, wherein a pair of front wheels rotate clockwise or counterclockwise during steering, and at the same time, each of the pair of front wheels moves forward or backward to provide a sufficient rotation angle with little power. that made it possible

Description

Electric three wheeled vehicle for improving steering stability}

The present invention relates to vehicle steering technology, and more particularly to an electric tricycle with improved steering stability.

As described in Korean Patent Publication No. 10-2012-0112026 (October 11, 2012), an electric three-wheeled vehicle is a means of moving by rotating the front or rear wheels using the rotational force of a motor. A front wheel and a pair of rear wheels may be provided, and steering is performed using non-powered wheels that do not use motor torque.

An electric three-wheeled vehicle, which has excellent running stability compared to an electric two-wheeled vehicle and is smaller and lighter than an electric four-wheeled vehicle, is easy to manufacture and relatively inexpensive, so it is mainly used as a means of transportation for short distances. However, in spite of these advantages, since it does not provide sufficient angle and power to offset the centrifugal force during left and right rotation, it is not widely used due to insufficient rotational stability.

Therefore, the inventors of the present invention provide an electric drive capable of improving rotational stability by providing a sufficient rotational angle even with little power by moving a pair of front wheels in a clockwise or counterclockwise direction at the same time as a pair of front wheels rotate in a clockwise or counterclockwise direction during steering. A study was conducted on the steering technology of a tricycle.

Republic of Korea Patent Publication No. 10-2012-0112026 (2012.10.11)

The present invention provides an electric tricycle with improved steering stability capable of providing a sufficient rotational angle even with little power by moving a pair of front wheels in a clockwise or counterclockwise direction during steering and at the same time moving in a front or rear direction, respectively. for that purpose.

According to one aspect of the present invention for achieving the above object, an electric tricycle with improved steering stability includes a pair of front wheels; one rear wheel; a drive motor for rotationally driving one rear wheel; a steering unit for steering the pair of front wheels to rotate clockwise or counterclockwise; a steering assist unit for assisting steering by moving a pair of front wheels in a forward or backward direction; and a control unit that controls the overall device including control of rotation driving of the drive motor.

According to an additional aspect of the present invention, the steering unit is provided on the handle and the rotating shaft is rotated according to the user's handle operation; a steering rod installed through the rotating shaft so as to face forward and backward perpendicularly to the rotating shaft and rotating in the rotational direction of the rotating shaft; a pair of horizontal rods, the center of which is linked to both ends of the steering rod, to convert rotational motion of the steering rod into reciprocating motion; It may include a pair of vertical rods whose both ends are linked to both ends of the pair of horizontal rods to convert the reciprocating motion of the pair of horizontal rods back into rotational motion to steer the pair of front wheels.

According to an additional aspect of the present invention, the steering assist unit may be implemented to mechanically move a pair of front wheels that are retracted in a direction perpendicular to each of the pair of vertical bars in a forward or rearward direction according to rotation of the rotating shaft.

According to an additional aspect of the present invention, the steering aid may be implemented to electronically control move the pair of front wheels on the pair of vertical rods in a forward or backward direction depending on the angle of rotation of the rotating shaft.

According to an additional aspect of the present invention, a rotation angle sensor for detecting a rotation angle of a rotation shaft of the steering assistance unit; It may include a front wheel moving unit that receives a pair of front wheel movement control commands according to the rotation angle of the rotation shaft detected by the rotation angle sensor from the control unit and moves the pair of front wheels in a front or rear direction on the pair of vertical rods.

The present invention has the effect of improving rotational stability by providing a sufficient rotational angle even with little power by moving a pair of front wheels in a clockwise or counterclockwise direction during steering and at the same time moving each of the pair of front wheels in a forward or rearward direction. .

1 is a view showing the configuration of an embodiment of an electric tricycle with improved steering stability according to the present invention.
FIG. 2 is a diagram showing an embodiment of a case in which a steering assistance unit of an electric tricycle with improved steering stability according to the present invention is implemented in a mechanically controlled manner.
FIG. 3 is a view showing an embodiment of a case in which a steering assistance unit of an electric tricycle having improved steering stability according to the present invention is implemented in an electronically controlled manner.

Hereinafter, the present invention will be described in detail so that those skilled in the art can easily understand and reproduce the present invention through preferred embodiments described with reference to the accompanying drawings. Although specific embodiments are illustrated in the drawings and related details are described, they are not intended to limit the various embodiments of the present invention to any particular form.

In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the embodiments of the present invention, the detailed description will be omitted.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be.

On the other hand, when a component is referred to as “directly connected” or “directly connected” to another component, it should be understood that no other component exists in the middle.

1 is a view showing the configuration of an embodiment of an electric tricycle with improved steering stability according to the present invention. As shown in FIG. 1, the electric tricycle 100 with improved steering stability according to this embodiment includes a pair of front wheels 110, one rear wheel 120, a driving motor 130, and a steering unit 140. ), a steering assist unit 150, and a control unit 160.

The pair of front wheels 110 are non-powered wheels to which rotational force is not applied by a driving motor, and rotate clockwise or counterclockwise by clockwise or counterclockwise steering according to a handle (not shown) on which a user's left or right rotation operation is performed. rotates clockwise

One rear wheel 120 is a power wheel to which rotational force is applied by a driving motor, and rotates clockwise or counterclockwise regardless of clockwise or counterclockwise steering according to the handle on which the user's left or right rotation operation is performed. It doesn't work.

The driving motor 130 is a power source for rotationally driving one rear wheel 120 . The driving motor 130 rotates and drives one rear wheel 120 by being started by being supplied with power from a rechargeable battery (not shown) charged by being connected to an external power source.

The steering unit 140 steers the pair of front wheels 110 to rotate clockwise or counterclockwise. For example, the steering unit 140 may include a rotating shaft 141, a steering rod 142, a pair of horizontal rods 143, and a pair of vertical rods 144.

The rotating shaft 141 is attached to the handle and rotates according to the user's manipulation of the handle. When the user holds the handle and rotates the handle in a clockwise or counterclockwise direction to move the tricycle left or right, the rotating shaft 141 installed at the center of the handle also rotates clockwise or counterclockwise.

The steering rod 142 is installed through the rotation shaft 141 so as to face forward and backward perpendicularly to the rotation shaft 141, and rotates in the rotation direction of the rotation shaft 141. When the handle is rotated clockwise or counterclockwise by the user's handle manipulation, the steering rod 142 installed through the rotating shaft 141 also rotates clockwise or counterclockwise.

The pair of horizontal rods 143 are linked at both ends of the steering rod 142 at their centers, respectively, to convert rotational motion of the steering rod into reciprocating motion. For example, both ends of the steering rod 142 are installed at the center of each of the pair of horizontal rods 143, and when the steering rod 142 rotates clockwise or counterclockwise, the upper horizontal rod moves to the right or left, and the lower The horizontal bar of the upper horizontal bar and may be implemented to move offset from each other in the opposite direction.

Both ends of the pair of vertical bars 144 are linked to both ends of the pair of horizontal bars 143, respectively, and convert the reciprocating motion of the pair of horizontal bars 143 back into rotational motion to steer the pair of front wheels. Since the pair of horizontal rods 143 move in the left or right direction so as to offset each other as the steering rod 142 rotates clockwise or counterclockwise, a pair of vertical rods linked to both ends of the pair of vertical rods 144 ( 144) is rotated clockwise or counterclockwise by a pair of horizontal bars 143 that move left or right so as to be offset from each other.

Accordingly, when the pair of front wheels 110, which are non-powered wheels, are reduced in a direction perpendicular to each of the pair of vertical rods 144, the pair of vertical rods 144 rotate clockwise or counterclockwise, so that the pair of front wheels ( 110) rotates in the right or left direction.

The steering assist unit 150 assists steering by moving the pair of front wheels 110 forward or backward. At this time, the steering assist unit 150 may be implemented mechanically or electronically. A detailed description of this will be described later with reference to FIGS. 2 and 3 .

The control unit 160 controls the overall device, including control of rotation driving of the driving motor 130 . For example, the control unit 160 rotates the drive motor 130 in a forward direction to control the tricycle to move forward, and rotates the drive motor 130 in a reverse direction to control the tricycle to move backward.

By implementing in this way, the present invention rotates a pair of front wheels clockwise or counterclockwise by the steering unit 140 during steering, and at the same time each of the pair of front wheels moves in a forward or backward direction by the steering assist unit 150, thereby reducing Since a sufficient rotational angle can be provided even with power, rotational stability of the tricycle can be improved.

On the other hand, according to an additional aspect of the invention, a pair of front wheels 110 in which the steering auxiliary unit 150 is reduced in a direction perpendicular to each of the pair of vertical rods 144 according to the rotation of the rotating shaft 141 of the steering unit 140 ) in a forward or backward direction.

FIG. 2 is a diagram showing an embodiment of a case in which a steering assistance unit of an electric tricycle with improved steering stability according to the present invention is implemented in a mechanically controlled manner. As shown in FIG. 2, the steering auxiliary unit 150 according to this embodiment installs the vertical steering auxiliary rod 151 so as to penetrate the rotating shaft 141 so as to face in the left and right directions perpendicular to the rotating shaft 141, and , The steering auxiliary unit 150 is implemented in a mechanically controlled manner by laying down each of both ends of the vertical steering auxiliary rods 151 at the center of the pair of vertical rods 144 in which the pair of front wheels 110 are built in the vertical direction.

In this implementation, the entire steering unit 140 is rotated in a clockwise or counterclockwise direction only by rotation of the rotating shaft 141 independently of the steering operation of the steering unit 140 to move the pair of front wheels 110 forward or backward. Therefore, it is possible to provide a sufficient rotational angle even with a small amount of power, thereby improving the rotational stability of the three-wheeled vehicle.

Meanwhile, according to an additional aspect of the invention, the steering assist unit 150 moves the pair of front wheels 110 forward or backward on the pair of vertical rods 144 according to the rotation angle of the rotation shaft 141 of the steering unit 140. It may be implemented to electronically controllable movement in the direction.

FIG. 3 is a view showing an embodiment of a case in which a steering assistance unit of an electric tricycle having improved steering stability according to the present invention is implemented in an electronically controlled manner. As shown in FIG. 3 , the steering assist unit 150 according to this embodiment includes a rotation angle sensor 152 and a front wheel moving unit 153.

The rotation angle sensor 152 detects the rotation angle of the rotation shaft 141 of the steering unit 140 . For example, a plurality of magnets (ferromagnets) are attached to the rotating shaft 141 in a concave-convex shape, and an electronic coil, a Hall element, or a magnetic resistance element is placed close to the magnets to measure the number of concavities and convexities to obtain a rotation angle. The rotation angle sensor 152 may be implemented in an electronic type, a Hall effect type, or a magnetoresistive type.

The front wheel moving unit 153 receives a pair of front wheel movement control command according to the rotation angle of the rotation shaft 141 detected by the rotation angle sensor 152 from the control unit 160 and moves the pair of front wheels 110 to the pair. It moves in the forward or backward direction on the vertical rod 144. To this end, guide grooves 144a through which the pair of front wheels 110 are slid and guided may be formed on each of the pair of vertical rods 144 .

For example, the front wheel moving unit 153 is composed of a rack gear (not shown) and a pinion gear (not shown), and a pair of front wheel movement control commands according to the rotation angle of the rotating shaft 141 Accordingly, it can be implemented to rotate the pinion gear clockwise or counterclockwise by the rotation angle of the rotating shaft using a motor (not shown), and convert the rotational motion into reciprocating motion through a rack gear meshing with the pinion gear. there is.

When the front wheel 110 is coupled to the lower part of the rack gear in a state in which the rack gear is guided and moved along the guide grooves (not shown) formed in the pair of vertical rods 144, the rotation angle sensor 152 The pair of front wheels 110 can be moved forward or backward on the pair of vertical rods 144 according to the rotational angle of the rotation shaft 141 detected by .

In the case of this implementation, since the pair of front wheels 110 can be moved forward or backward only by rotating the rotating shaft 141 independently of the steering operation of the steering unit 140, a sufficient rotational angle can be provided even with little power. This can improve the rotational stability of the tricycle.

As described above, the present invention improves rotational stability by providing a sufficient rotational angle even with little power by moving a pair of front wheels in a clockwise or counterclockwise direction during steering and at the same time moving each of the pair of front wheels in a forward or rearward direction. Therefore, the object of the present invention described above can be achieved.

Various embodiments disclosed in this specification and drawings are only presented as specific examples to aid understanding, and are not intended to limit the scope of various embodiments of the present invention.

Therefore, the scope of various embodiments of the present invention includes all changes or modified forms derived based on the technical spirit of various embodiments of the present invention other than the embodiments described herein are included in the scope of various embodiments of the present invention. should be interpreted as being

INDUSTRIAL APPLICABILITY The present invention can be used industrially in the vehicle steering-related technical field and application technical field thereof.

100: electric tricycle
110: front wheel
120: rear wheel
130: driving motor
140: steering unit
141: rotating shaft
142: steering rod
143: horizontal bar
144: vertical bar
150: steering auxiliary unit
151: steering auxiliary rod
152: rotation angle sensor
153: front wheel moving part
160: control unit

Claims (5)

a pair of front wheels;
one rear wheel;
a drive motor for rotationally driving one rear wheel;
a steering unit for steering the pair of front wheels to rotate clockwise or counterclockwise;
a steering assist unit for assisting steering by moving a pair of front wheels in a forward or backward direction;
A control unit for controlling the overall device including rotation drive control of the driving motor;
include,
During steering, a pair of front wheels rotate clockwise or counterclockwise by the steering unit, and at the same time, each front wheel moves forward or backward by the steering assist unit, providing an electric drive with improved steering stability that provides a sufficient rotational angle with less power. tandem. According to claim 1,
Steering add:
A rotating shaft that is installed on the handle and is rotated according to the user's handle operation;
a steering rod installed through the rotating shaft so as to face forward and backward perpendicularly to the rotating shaft and rotating in the rotational direction of the rotating shaft;
a pair of horizontal rods, the center of which is linked to both ends of the steering rod, to convert rotational motion of the steering rod into reciprocating motion;
A pair of vertical rods, the ends of which are linked to both ends of the pair of horizontal rods, to convert the reciprocating motion of the pair of horizontal rods back into rotational motion to steer the pair of front wheels;
Electric tricycle with improved steering stability, including. According to claim 2,
Steering aid:
An electric tricycle with improved steering stability that moves a pair of front wheels in a direction perpendicular to each of the pair of vertical bars in a mechanically controlled manner in the front or rear direction according to the rotation of the rotating shaft. According to claim 2,
Steering aid:
An electric tricycle with improved steering stability that electronically controls a pair of front wheels moving forward or backward on a pair of vertical rods according to the rotation angle of a rotating shaft. According to claim 4,
Steering aid:
a rotation angle sensor for detecting a rotation angle of the rotation shaft;
A front wheel moving unit for receiving a pair of front wheel movement control commands according to the rotation angle of the rotation shaft detected by the rotation angle sensor from the control unit and moving the pair of front wheels in a forward or backward direction on a pair of vertical rods;
Electric tricycle with improved steering stability, including.

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