WO2017094934A1

WO2017094934A1 - Vehicle power steering system having double shaft power transmission apparatus

Info

Publication number: WO2017094934A1
Application number: PCT/KR2015/013113
Authority: WO
Inventors: 유광영
Original assignee: 주식회사 지영린시스템
Priority date: 2015-11-30
Filing date: 2015-12-03
Publication date: 2017-06-08
Also published as: KR101656864B1

Abstract

The present invention relates to a vehicle power steering system having a double shaft power transmission apparatus, the system substituting for a motor driven power steering (MDPS) system in the related art. More specifically, the present invention relates to a vehicle power steering system having a double shaft power transmission apparatus, in which first and second power transmission units are configured on a steering column coupled with a steering wheel and an axle , and are operated by power received from a power generation unit to assist a vehicle's ability to change direction, thereby providing a driver with excellent steering feel and excellent steering wheel operating (handling), as well as ensuring excellent safety.

Description

Automotive auxiliary steering with biaxial power train

The present invention relates to a vehicle auxiliary steering device having a two-axis power transmission device that replaces a conventional motor driven power steering (MDPS), and more particularly, to a steering shaft coupled to a steering wheel and a wheel shaft. The first and second power transmission units are configured, and the first and second power transmission units are operated by the power generating unit to assist the vehicle's direction changing ability, thereby providing excellent safety as well as steering sense and steering wheel transmitted to the driver. The present invention relates to a vehicle auxiliary steering device equipped with a two-axis power transmission device with excellent handling feeling (handling).

The steering device is a device that allows the driver to freely change the direction of movement of the car according to the needs of the driver by rotating the steering wheel. The steering device can arbitrarily change the center of rotation of the front wheel of the car to advance the car in the desired direction. To assist the device.

In order to steer the wheel while the vehicle is stationary, the steering wheel should be rotated by applying more force than the friction between the wheel and the road surface, especially when the weight of the car is large and the wheel width is wide. The steering power of the driver is further increased.

In the steering device, an auxiliary steering device for transmitting power to assist the driver's power is added, and a hydraulic steering device using hydraulic pressure of the hydraulic pump (HPS, hereinafter referred to as 'HPS') and An electric steering device (MDPS, Motor Driven Power Steering, hereinafter referred to as 'MDPS') is used. (The electric steering device is also referred to as EPS or Electronic Power Steering.)

The HPS uses heavy pumps such as a hydraulic pump and hydraulic oil (about 1 [liter]), and a lot of heavy equipment is used.The hydraulic oil is expensive every time the hydraulic oil is replaced. As a result, MDPS using electric motors has become increasingly common since the 1990s.

As such, MDPS is a device that assists the vehicle's ability to change direction by operating the drive motor according to the speed of the signal sensed through various sensors connected to the steering wheel. And it is effective in improving fuel economy through weight reduction.

Thus, as a prior art related to an auxiliary vehicle steering apparatus equipped with a two-axis power transmission device, as shown in Figure 9 (a) "electric steering device" of the Republic of Korea Patent Publication No. 10-0854472 (hereinafter, 'prior art 1 ') refers to the bearing supporting the worm in conjunction with the rotation of the steering assist motor in the housing and the outer circumference of the bearing, which suppresses the movement of the bearing in the radial direction and provides the restraining force. The elastic body is provided differently in the directional position, and the worm is urged to the engaging portion (matching portion) with the worm wheel by a small portion that suppresses the movement of the bearing in the radial (central) direction. Part makes it difficult for the worm to move along the string of the worm wheel, and by this structure, the amount of backlash of the worm with the worm wheel can be reduced by the elastic body, and the rotating soil applied to the meshing portions of the worm wheel The present invention relates to an electric steering system that allows relatively small.

As another prior art, as shown in (b) of FIG. 9, "motor assisted steering apparatus" (hereinafter, referred to as "prior art 2") of Korean Patent Publication No. 10-1100671 is used when operating a steering wheel. The present invention relates to an electric auxiliary steering apparatus for applying an auxiliary steering force to a rack bar by using a linear towing means wound and unwound by a driving means driven in the.

However, the motor-driven power steering (MDPS) made of the prior art including the prior arts 1 and 2 is a device for assisting steering of the vehicle as shown in (a) of FIG. 1, but driving the MDPS. In case of failure or breakage of the driving motor, it may be a factor that hinders steering of the driver.

In addition, due to the large number of MDPS interventions in steering wheel steering, the response speed is slow compared to the speed at which the vehicle is operated. Therefore, steering wheel is difficult to operate at speeding, discomfort depending on the driver, and operation feeling is not smooth.

For example, the steering wheel may return later than expected due to a late self-return of the steering wheel after the steering wheel is rotated greatly.

In addition, the steering wheel transmits the road condition to the driver in the form of vibration, and through this feedback, it is necessary to understand the road condition and the grip state of the tire to help the driving safely, but due to excessive intervention of the MDPS, the driver and the steering wheel There is a problem that the feedback of the.

In addition, the normal driving current of the motor driving the MPDS is about 78 [A], which is quite high, which is close to the capacity of the alternator / generator mounted in a conventional gasoline vehicle.

In other words, the conventional MDPS uses a drive motor that rotates in both directions to generate back electromotive force by temporarily sending excessive current to the drive motor for reaction speed while driving the car, and as a result, most of the capacitance required for the car is generated by the MDPS. Is consumed in the drive motor.

The counter electromotive force is an effective electromotive force that acts to block a current flowing in a predetermined direction inside the system as a driving force causing a current to flow in a direction opposite to a desired current direction and corresponds to a reaction relationship to the action of the dynamic system.

Therefore, if the system load is increased due to an increase in power consumption in the vehicle and the system is damaged, steering is not possible due to a failure or breakage of the drive motor driving the MDPS as described above, resulting in a safety problem.

When the power is cut off by the MDPS drive motor itself, a certain amount of force is required to turn the drive motor to an external force. When the drive motor is directly connected to the steering system, a torque required for steering is secured. There is a reduction gear between the drive motor and the steering system. Therefore, the greater the reduction ratio of the reduction gear, the greater the force required to turn the drive motor is, and thus several tens of force is required than turning the steering wheel.

Therefore, the moment the power is cut off the drive motor, the steering wheel feels as if it is fixed there is a problem that the driver himself can not control the driving direction of the car in the desired direction to create anxiety for the driver.

* Prior art literature *

(Patent Document 0001) Republic of Korea Patent Publication No. 10-0854472 (2008.08.20)

(Patent Document 0002) Republic of Korea Patent Publication No. 10-1100671 (2011.12.23)

Accordingly, the present invention has been made to solve the above-mentioned conventional problems,

According to the present invention, a drive motor that rotates in both directions configured in a conventional electric steering device (MDPS, Motor Driven Power Steering) can be replaced with a drive motor that rotates in one direction, so that the life of the drive motor is prolonged, thereby providing excellent safety. An object of the present invention is to provide a vehicle auxiliary steering device equipped with a two-axis power transmission device.

In addition, another object of the present invention is due to the configuration of the first and second power transmission device does not require a lot of current required to temporarily send the current in the opposite direction to the drive motor rotates in both directions, and the resulting back EMF The purpose is to reduce the load on the electric system of the car due to power consumption, thereby improving stabilization of the electronic system in the car.

In addition, the components constituting the vehicle auxiliary steering device equipped with the inventors' two-axis power transmission device is simple and excellent in durability, and the driver feels a natural feeling of handling (handling) without the mechanical response due to the quick response when operating the steering wheel. Can be.

The present invention for achieving the above object is devised to achieve the problem to be solved,

In the vehicle auxiliary steering device provided with a two-axis power transmission device,

A handle shaft gear formed on a handle shaft coupled with a steering wheel (H) and a wheel shaft;

A first power transmission portion engaged with one side of the handle shaft gear;

A second power transmission unit engaged with the other side of the handle shaft gear in the same manner as the first power transmission unit;

Consists of a power generating unit for generating power of the first and second power transmission unit,

It is characterized by assisting the vehicle's ability to change direction by operating the power generating unit and the first and second power transmission units with signals detected through sensors connected to the steering wheel (H, steering wheel).

At this time, the power generating unit,

A power generator comprising a drive motor, a reducer, and a main gear to supply power to the first and second power transmission units, wherein the power generator supplies power alone or to the first and second power transmission units. Each of the two power transmission units may be configured to supply power.

In addition, the first power transmission unit,

A first gear engaged with one side of the main gear of the power generator;

A first power transmission device coupled to the first gear in an axial direction; And

And a second gear coupled to the first power transmission device in an axial direction.

Characterized in that the second gear is engaged with one side of the handle shaft gear,

The second power transmission unit,

A third gear engaged with the other side of the main gear of the power generating portion in the same manner as the first gear of the first power transmitting portion;

A second power transmission device coupled to the third gear in the axial direction; And

A fourth gear coupled to the second power transmission device in an axial direction;

A fourth gear is engaged with the other side of the handle shaft gear in the same manner as the second gear of the first power transmission portion.

The first and second power transmission devices are configured in a combination of gears or disks, and are formed in an electromagnetic clutch driven by an input of an electronic signal.

A rotation direction shift gear positioned between the second gear of the first power transmission unit and the handle shaft gear or between the fourth gear of the second power transmission unit and the handle shaft gear to change the rotation direction of the gear in the opposite direction; It is composed.

On the other hand, before the present specification, the terms or words used in the claims should not be construed as being limited to the ordinary or dictionary meanings, the inventors of the concept of the term in order to explain his invention in the best way On the basis of the principle that can be appropriately defined should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

According to the present invention as described above in the above configuration and operation,

In the vehicle auxiliary steering device equipped with the biaxial power transmission device of the present invention can be replaced by a drive motor that rotates in one direction in a conventional bi-directional drive motor configured in the conventional motor driven power steering (MDPS). The long life of the product ensures excellent safety.

In addition, due to the configuration of the first and second power transmission device, which is a component of the present invention, a large amount of current required to temporarily send current to the opposite direction is not required for the driving motor rotating in both directions, and thus, a counter electromotive force generated is generated. This reduces the load on the vehicle's electrical system due to power consumption, thereby increasing the stability of the electronic system in the vehicle.

In addition, the components constituting the present invention are simple and excellent in durability, easy to replace and handle the product, and the driver can feel a natural feeling of handling (handling) without the mechanical response is quick response according to the steering wheel operation.

In addition, since the reaction speed is fast, it is possible to provide an optimum auxiliary steering device suitable for an autonomous vehicle and an optimum system of an autonomous vehicle using the same.

In addition, even if a problem occurs or is damaged only in the vehicle auxiliary steering apparatus equipped with the two-axis power transmission device according to the present invention due to the system damage, the steering wheel can be easily operated because it can be very effective invention.

Figure 1 shows a simplified contrast of the conventional vehicle assisted steering apparatus with MDPS and the present inventors two-axis power transmission device.

Figure 2 shows a block diagram of a vehicle auxiliary steering device provided with a two-axis power transmission device of the present invention.

Figure 3 shows an embodiment of the operation of the vehicle auxiliary steering apparatus provided with the inventors both-axis power transmission device.

Figure 4 shows a simplified view of the operation of the vehicle auxiliary steering apparatus equipped with the inventors both-axis power transmission device.

Figure 5 shows a perspective view of a first state according to an embodiment of the vehicle auxiliary steering apparatus provided with the two-axis power transmission device of the present invention.

Figure 6 shows a front view according to an embodiment of the vehicle auxiliary steering apparatus provided with the inventors both-axis power transmission device.

Figure 7 shows a perspective view of a second state according to an embodiment of the vehicle auxiliary steering device provided with the two-axis power transmission device of the present invention.

8 is a perspective view illustrating a state in accordance with an embodiment in which a plurality of power generators are configured among components of a vehicle auxiliary steering device provided with a biaxial power train of the present invention.

Figure 9 shows a representative view of the prior art for the vehicle auxiliary steering device equipped with the present inventors two-axis power transmission device.

* Detailed description of the major symbols in the drawings *

1: Auxiliary steering device for automobile with biaxial power train

100: handle shaft gear

110: handle shaft

200: first power transmission unit

210: first gear

211: first gear shaft bearing

220: first power transmission device

230: second gear

231: second gear shaft bearing

300: second power transmission unit

310: third gear

311: third gear shaft bearing

320: second power transmission device

330: fourth gear

331: fourth gear shaft bearing

400: power generating unit

410: power generating device

411: drive motor

412: reducer

413: main gear

414: main gear shaft bearing

500: rotation direction switching gear

510: direction change gear shaft bearing

600: main housing

700: first plate

710: through hole

800: second plate

H: Steering wheel

S: wheel shaft

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the vehicle auxiliary steering device provided with a biaxial power transmission device of the present invention.

Figure 1 shows a simplified contrast of the conventional auxiliary vehicle and the vehicle auxiliary steering apparatus provided with the present inventors two-axis power transmission device, Figure 2 shows a schematic view of the vehicle auxiliary steering apparatus provided with the present inventors two-axis power transmission device. will be.

In the vehicle auxiliary steering device (1) equipped with a two-axis power train,

A handle shaft gear 100 formed on a handle shaft 110 coupled with a steering wheel H and a wheel shaft S;

A first power transmission unit 200 engaged with one side of the handle shaft gear 100;

A second power transmission unit 300 engaged with the other side of the handle shaft gear 100 in the same manner as the first power transmission unit;

Consists of; power generating unit 400 for generating power of the first and second power transmission units (200, 300),

By assisting the direction change capability of the vehicle by operating the power generating unit 400 and the first and second power transmission units (200, 300) by a signal detected through a sensor connected to the steering wheel (H, steering wheel). It is done.

At this time, as shown in Figure 5 to 7 the power generating unit 400,

A power generator 410 consisting of a drive motor 411, a reducer 412, and a main gear 413 is configured to supply power to the first and second

power transmission units

200 and 300.

The drive motor 411 of the power generator 410 of the present invention is a motor that rotates in one direction instead of a motor that rotates in both directions by an electronic signal that is configured in the conventional MDPS and is required for the power generator 410. By minimizing the current, the active power required to steer to change the direction of travel of the vehicle is reduced, thereby reducing the overall power consumption required to drive the vehicle.

That is, the driving motor 411 that rotates in one direction of the power generating device 410 reduces the power consumption of the vehicle, thereby becoming a basis for stabilizing the system of the vehicle electrical system.

In addition, the power generator 410 as shown in Figure 1 (b) or 5 to 8,

The first and second

power transmission units

200 and 300 may be provided in plural so as to supply power alone or to supply power to each of the first and second

power transmission units

200 and 300.

As shown in FIG. 1 (b) or FIGS. 5 to 7, the main gear 413 must be used in order for the power generator 410 to supply power to the first and second

power transmission units

200 and 300 by itself. Should be formed.

This is to rotate the main gear 413 in engagement with the first gear 210 configured in the first power transmission unit 200 and the third gear 310 configured in the second power transmission unit 300 to be described below. This is to rotate the first and

third gears

210 and 310.

At this time, the first and

third gears

210 and 310 rotate in opposite directions to the main gear 413 by being engaged with both sides of the main gear 413 due to the characteristics of the gears. It will rotate in the same direction.

That is, when the main gear 413 rotates in the clockwise direction, the first and

third gears

210 and 310 rotate in the counterclockwise direction.

On the contrary, when the power generator 410 supplies power to each of the first and second

power transmission units

200 and 300, as shown in FIG. 1B or 8, the main gear 413 and the first gear. The third and

second gears

230 and 310 may be omitted in the power generator 410 including the driving motor 411 and the reduction gear 412 in which the main gear 413 is omitted. 330) the second and

fourth gears

230 and 330 are respectively formed by the first and second

power transmission devices

220 and 320 configured to be connected to each other and act as signals sensed through a sensor connected to the steering wheel H. Can be rotated.

As described above, the first power transmission unit 200 shown in FIGS.

A first gear 210 engaged with one side of the main gear 413 of the power generator 400;

A first power transmission device 220 coupled to the first gear 210 in the axial direction; And

The first power transmission device 220 and the second gear 230 coupled in the axial direction; consisting of,

The second gear 230 is engaged with one side of the handle shaft gear 100,

The second power transmission unit 300,

A third gear 310 engaged with the other side of the main gear 413 of the power generating unit 400 in the same manner as the first gear 210 of the first power transmission unit 200;

A second power transmission device 320 coupled to the third gear 310 in the axial direction; And

Consisting of the fourth gear 330 is coupled to the second power transmission device 320 in the axial direction;

In the same manner as the second gear 230 of the first power transmission unit 200, the fourth gear 330 is formed to be engaged with the other side of the handle shaft gear 100.

That is, when the main gear 413 of the power generator 410 rotates as in the embodiment of the present invention, the first and

third gears

210 and 310 meshed with both sides of the main gear 413 rotate, and the first , The third gear (210, 310) is the second,

fourth gear

230, 330 through the first and second power transmission devices (220, 320) to operate as a signal sensed by the sensor connected to the steering wheel (H), respectively ) To assist the driver's steering by rotating the handle shaft gear 100 engaged with the second and

fourth gears

230 and 330.

In addition, the first and second

power transmission devices

220 and 320 are configured in the form of a combination of gears or disks, and are formed in the form of an electronic clutch of an open-close type driven by an input of an electronic signal. The types of gears and the number of gears configured in the

transmission units

200 and 300 and the first and second

power transmission devices

220 and 330 are merely exemplary embodiments for describing the present invention and may be variously modified. Be aware.

The combination of the components of the embodiment described so far can assist the driver's steering through the handle shaft gear 100, but the combination so far may question the utilization of the unidirectionally rotating drive motor 411. have.

Therefore, in the embodiment of the present invention, in order to solve the problem, between the second gear 230 of the first power transmission unit 200 and the handle shaft gear 100 or the fourth gear of the second power transmission unit 300 ( 330 and the rotational direction switching gear 500 which is located between the handle shaft gear 100 to switch the rotation direction of the gear in the opposite direction; further comprising the vehicle auxiliary steering with a two-axis power transmission device of the present invention The drive motor 411 rotating in one direction configured in the device 1 is connected to the first and second

power transmission units

200 and 300 and the rotation direction switching gear 500 which are configured in both axes with respect to the handle shaft gear 100. It is possible to achieve the same effect as the drive motor rotating in both directions configured in the conventional MDPS.

However, the rotation direction switching gear 500 should be configured to be the same as the gear ratio of the handle shaft gear 100.

Figure 3 shows the operation of the vehicle auxiliary steering apparatus equipped with the present inventors two-axis power transmission as an embodiment showing a steering of the vehicle equipped with an embodiment of the present invention, Figure 4 is a two-axis power transmission of the present invention by FIG. Shown is a simplified diagram of a vehicle assisted steering device equipped with the device.

That is, when the driver manipulates the steering wheel H to change the driving direction of the vehicle, FIG. 3 shows a signal detected by the steering wheel H operation direction of the driver through a sensor connected to the steering wheel H. 1, 2 power transmission device (220, 320) is changed to the Open or Close state.

For example, when the steering direction of the steering wheel (H) is clockwise, the first power transmission device 220 is changed from the open state to the closed state by the detected signal to handle the rotation of the first gear (210) The second gear 230 engaged with the axial gear 100 rotates to assist the driver's steering. At this time, the second power transmission device 320 maintains an open state so that the third,

fourth gears

310 and 330 As a bearing to assist idle, the third and

fourth gears

310 and 330 rotate along the main gear 413 without disturbing the rotating force of the first and

second gears

210 and 230.

Similarly, when the steering wheel H is operated in the counterclockwise direction, the second power transmission device 320 is changed to the closed state, and thus, the rotation of the third gear 310 and the handle shaft gear 100 are rotated. The engaged fourth gear 330 rotates to assist the driver's steering. In this case, the first power transmission device 220 maintains an open state to support the idle of the first and

second gears

210 and 230. Will be in the state.

In addition, as shown in FIGS. 5 to 7, some surfaces of the power generating unit 400 and upper portions of the first and

third gears

210 and 310 shafts are fixed so that the first and

third gears

210 and 310 are fixed. A main housing 600 configured to rotate, and a through hole 710 into which lower portions of the first and

third gears

210 and 310 are inserted, respectively, and a lower portion of the main gear 413 shaft is fixed to an upper surface thereof. The first plate configured to fix the first and second

power transmission devices

220 and 320 on the same axis line as the through hole 710 so that the main gear 413 and the first and

third gears

210 and 310 rotate, respectively. 700; And a lower portion of the second and

fourth gears

230 and 330 shafts and the rotation direction change gear 500 are fixed to rotate the second and

fourth gears

230 and 330 and the rotation direction change gear 500, respectively. It further comprises; two plates (800),

A main gear shaft bearing 414 fixed to the first plate 700 and engaged with the main gear 413 shaft; and a first gear fixed to the main housing 600 and coupled with the first gear 210 shaft; A second gear shaft bearing 231 fixed to the shaft bearing 211 and the second plate 800 and coupled to the second gear 230 shaft; and a third gear fixed to the main housing 600. A third gear shaft bearing 311 coupled to the shaft; and a fourth gear shaft bearing 331 fixed to the second plate 800 and coupled to the fourth gear 330 shaft; And a rotation direction switch gear shaft bearing 510 fixed to the second plate 800 and coupled with the rotation direction change gear 500 shaft. The present invention is configured to support the axial load of each gear. Each component of the embodiment of the present invention for the vehicle auxiliary steering apparatus 1 provided with the inventors' two-axis power transmission device is organically coupled to each other to provide an auxiliary steering apparatus having excellent safety and efficiency.

In addition, the vehicle auxiliary steering apparatus 1 equipped with the present inventors' two-axis power transmission device may replace the conventional MDPS, and the electronic control unit (ECU) system applied to the existing vehicle may be used as it is.

As described above, the present invention is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the embodiments of the present disclosure may be embodied in various forms without departing from the technical spirit or the main features, which are merely illustrative in all respects and should not be construed as limiting.

The steering device is a device for converting the traveling direction of the vehicle.

In this steering device, an electric steering device (MDPS, Motor Driven Power Steering), which is an auxiliary device for transmitting power to assist the driver's power, is added.

However, conventional motor-driven power steering (MDPS) causes discomfort with the vehicle and the driver to feel doubt and anxiety about the safety of the vehicle.

Therefore, the vehicle auxiliary steering apparatus equipped with the two-axis power transmission apparatus according to the present invention not only has excellent safety, but also makes the driver feel a natural steering handle (handling), thereby inspecting the performance and safety of the vehicle. The present invention can be applied to contribute to the promotion of various automobile industries such as manufacturing of automobiles and automobile parts, and automobile manufacturing industry.

Claims

In the vehicle auxiliary steering device (1) equipped with a two-axis power train,

A handle shaft gear 100 formed on a handle shaft 110 coupled with a steering wheel H and a wheel shaft S;

A first power transmission unit 200 engaged with one side of the handle shaft gear 100;

A second power transmission unit 300 engaged with the other side of the handle shaft gear 100 in the same manner as the first power transmission unit;

Consists of; power generating unit 400 for generating power of the first and second power transmission units (200, 300),

By assisting the direction change capability of the vehicle by operating the power generating unit 400 and the first and second power transmission units (200, 300) by a signal detected through a sensor connected to the steering wheel (H, steering wheel). Auxiliary steering device equipped with a two-axis power transmission device.
The method of claim 1,

Power generation unit 400,

A power generator 410 consisting of a drive motor 411, a reducer 412, and a main gear 413; and configured to supply power to the first and second power transmission units 200 and 300. Automotive auxiliary steering with power train.
The method of claim 2,

The power generator 410 is,

Biaxial power, characterized in that it can be configured in plurality so as to supply power to the first, second power transmission unit (200, 300) alone or power each of the first, second power transmission unit (200, 300). Automotive auxiliary steering with transmission device.
The method of claim 1,

The first power transmission unit 200,

A first gear 210 engaged with one side of the main gear 413 of the power generator 400;

A first power transmission device 220 coupled to the first gear 210 in the axial direction; And

The first power transmission device 220 and the second gear 230 coupled in the axial direction; consisting of,

Automobile auxiliary steering device with a two-axis power transmission device characterized in that the second gear 230 is engaged to one side of the handle shaft gear (100).
The method of claim 1,

The second power transmission unit 300,

A third gear 310 engaged with the other side of the main gear 413 of the power generating unit 400 in the same manner as the first gear 210 of the first power transmission unit 200;

A second power transmission device 320 coupled to the third gear 310 in the axial direction; And

Consisting of the fourth gear 330 is coupled to the second power transmission device 320 in the axial direction;

Automobile auxiliary vehicle provided with a two-axis power transmission device, characterized in that the fourth gear 330 is engaged with the other side of the handle shaft gear 100 in the same manner as the second gear 230 of the first power transmission unit 200. Steering system.
The method according to claim 4, 5,

The first and second power transmission devices 220 and 320 may include a combination of gears or disks, and are formed in an electronic clutch method driven by an input of an electronic signal. Auxiliary Steering.
The method of claim 1,

The vehicle auxiliary steering device 1 having the two-axis power transmission device is provided.

Located between the second gear 230 of the first power transmission unit 200 and the handle shaft gear 100 or between the fourth gear 330 of the second power transmission unit 300 and the handle shaft gear 100. Rotational direction switching gear 500 for switching the rotational direction of the gear in the opposite direction; vehicle auxiliary steering apparatus provided with a two-axis power transmission device, characterized in that it further comprises.