KR20080013491A - Device for automatic adjusting a mounting position trailing arm of vehicle - Google Patents

Abstract

A device for automatically adjusting a mounting position of a trailing arm of a vehicle is provided to improve ride comfort and handling stability by automatically adjusting a mounting position of the trailing arm according to driving condition of the vehicle. A device for automatically adjusting a mounting position of a trailing arm of a vehicle comprises a trailing arm(10) provided with a wheel at one end thereof, a mounting bracket(20) combined with the other end of the trailing arm by a first fastener(30) and including a predetermined slot hole(21) formed around the first fastener, a second fastener(40) combined with the trailing arm via the slot hole, a socket(50) fixed to the front of the second fastener, a motor(60) fixed to the trailing arm and driven by an ECU, and a power transmission unit(80) provided between the motor and socket to move the second fastener along the slot hole according to driving condition of the vehicle.

Description

Device for automatic adjusting a mounting position trailing arm of vehicle

1 is a perspective view showing a rear wheel suspension of a typical vehicle.

2A and 2B are side views schematically showing a conventional trailing arm body mounting position.

3 is a perspective view showing the structure of the present invention.

4 is a detailed view of the portion “A” of FIG. 3.

5 is a front view of the mounting bracket.

6a and 6b is an operating state diagram of the present invention.

* Description of symbols on main parts of the drawings *

10-trailing arm 20-mounting bracket

21-Slot Ball 22-Fastener

30-1st fastener 40-2nd fastener

50-socket 60-motor

70-ECU 80-Power Train

81-Connecting shaft 82-Universal joint

90-wheel

The present invention relates to a trailing arm mounting position automatic adjustment device, and more particularly, by automatically adjusting the body mounting position of the trailing arm in accordance with the driving situation of the vehicle, the trailing arm of the vehicle that can improve ride comfort and stability It relates to a mounting position automatic adjustment device.

In general, the suspension device of a vehicle serves to prevent vibration and shock continuously generated from the road surface of the vehicle while being transmitted to the frame through the wheel and the axle.

In addition, the suspension device improves the ride comfort of the occupant, prevents damage to the loaded luggage, prevents damage to the vehicle body due to excessive shock, and suppresses irregular vibrations of the wheel to promote driving safety. .

Such a suspension device is largely divided into an integrated suspension device and an independent suspension device. Here, the independent suspension device is configured to be able to move regardless of different wheels without connecting the left and right wheels to one axle.

Therefore, it is most often used for front wheels of passenger cars, and is also used for front wheels of light trucks and rear wheels of passenger cars.

1 is a perspective view showing a rear wheel suspension of a typical vehicle, Figures 2a and 2b is a side view schematically showing a conventional trailing arm body mounting position.

As shown in FIG. 1, a CTBA (Coupled Torsion Beam Axle) suspension device 100, which is a kind of rear suspension, is connected to a trailing arm 110 at both ends thereof and receives a torsion beam 120. ) Is coupled by welding, and one end of the trailing arm 110 is provided with a wheel 130, and the other end has a mounting bracket 140 for fixing to the vehicle body.

The CTBA suspension has the advantages of a simple structure and low cost, but is mainly used in the rear wheel of a compact car because the deformation of the wheel 130 is made due to the torsional deformation characteristic of the torsion beam 120 located at the center. The behavior is based on the position and thickness of the torsion beam 120, the roll steer characteristics and the anti-lift by the relative position on the "Z" axis of the trailing arm 110 body mounting position and the wheel center position. (Anti-Lift) characteristics and ride comfort characteristics are changed as follows.

That is, as illustrated in FIG. 2A, when the body mounting position of the trailing arm 110 is higher than the center of the wheel 130, the anti-lift is improved and the trailing arm 110 is pushed to the rear during a collision, so that the riding comfort is good. And since the oversteering tendency is shown by the relative movement of the left and right wheels (spinning outer ring-Bump, turning inner ring-Rebound), the driving performance is improved when driving straight, but the driving performance is lowered when turning.

On the other hand, when the body mounting position of the trailing arm 110 is lower than the center of the wheel 130 as shown in FIG. 2B, the anti-lift lifts during rolling and the trailing arm 110 moves forward during a collision, resulting in poor riding comfort. By showing the understeer tendency by the relative difference between the height difference and the left and right wheels (spinning outer ring-bump, turning inner ring-rebound), the driving performance is improved during the turning, but the driving performance is lowered when driving straight.

Therefore, the CTBA suspension device is a structural limitation, there is a problem that the simultaneous growth of the roll understeer performance and anti-lift and ride comfort characteristics is not easy.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, an object of the present invention by automatically adjusting the trailing arm mounting position according to the driving situation of the vehicle, it is possible to improve the riding comfort and stability To provide a trailing arm mounting position automatic adjustment device.

Such, the present invention is a trailing arm installed wheel at one end; A mounting bracket coupled to the other end of the trailing arm in a rotatable structure by a first fastener and fixedly mounted to the vehicle body, and having a predetermined slot hole formed around the first fastener; A second fastening tool coupled to the trailing arm through a slot hole formed in the mounting bracket; A socket press-fitted to the tip of the second fastener; A motor fixedly mounted to the trailing arm and driven by an ECU; Is installed between the motor and the socket is characterized in that it comprises a power transmission means for guiding movement along the slot hole according to the driving situation of the vehicle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art can easily implement the present invention.

Figure 3 is a perspective view showing the structure of the present invention, Figure 4 is a detailed view "A" of Figure 3, Figure 5 is a front view of the mounting bracket, Figures 6a and 6b is an operating state diagram of the present invention.

As shown in FIGS. 3 to 6, the present invention includes a mounting position automatic adjustment device capable of automatically adjusting the position of the trailing arm 10 installed on the vehicle body mounting bracket 20.

A slot hole 21 is formed in a predetermined shape on a front surface of the mounting bracket 20 to which one end of the trailing arm 10 is coupled, and a circular fastening hole 22 is formed at a lower end thereof, and the fastening hole 22 is formed. And the trailing arm 10 are rotatably coupled from the mounting bracket 20 by the first fastener 30 penetrating the trailing arm 10.

At this time, the slot hole 21 is formed of a long hole having the same center as the rotation axis of the trailing arm 10 to rotate from the mounting bracket (20).

On the other hand, the second fastener 40 is fitted through the slot hole 21 formed in the mounting bracket 20 to couple the other end of the trailing arm 10.

At this time, the second fastener 40 is preferably configured as a cam bolt to facilitate the rotation operation by the driving force of the motor 60 to be described later.

The socket 50 is press-fitted and fixed to the upper end of the second fastening hole 40, and the motor 60 driven by the ECU 70 is fixedly installed to the trailing arm 10 so that the motor ( As the 60 is driven, the predetermined power transmission means 80 connects between the drive shaft 61 of the motor 60 and the socket 50 to rotate the second fastener 40 so as to rotate the second fastener 40. ) Is configured to be guided and moved along the slot hole (21).

At this time, as the power transmission means 80 a plurality of connection shafts 81 installed between the drive shaft 61 and the socket 50 of the motor 60, and a universal joint connecting the plurality of connection shafts 81 It consists of 82.

Therefore, the driving force of the motor 60 is transmitted to the socket 50 in the order of the drive shaft 61, the universal joint 82 and the connecting shaft 81, so that the socket 50 can move along the slot hole 21. Done.

Referring to Figures 6a and 6b attached to the operating state of the present invention configured as described above are as follows.

First, when the vehicle is traveling straight, as shown in FIG. 6A, the second fastening hole 40 coupled to the slot hole 21 of the mounting bracket 20 is positioned at the upper end of the slot hole 21, and thus the trailing arm. (10) The body mounting position remains higher than the center of the wheel 90.

On the other hand, when the steering wheel is turned to change the direction on a curve road or a fork road while the vehicle is traveling straight, the ECU 70 reads signals of the vehicle speed and steering angle of the vehicle, determines the state of the vehicle, and drives the motor 60. The driving force of the motor 60 is transmitted to the socket 50 through the power transmission means 80 composed of the universal joint 82 and the connecting shaft 81, and the socket 50 is again connected to the second fastener 40. Since the second fastener 40 is moved to the lower side along the slot hole 21 around the first fastener 30 so that the body mounting position of the trailing arm 10 is the wheel (). The state becomes lower than the center of 90).

Therefore, since the trailing arm mounting position is automatically adjusted according to the driving situation of the vehicle as described above, performance (ride comfort and stability) suitable for the driving situation of the vehicle can be realized.

Although the present invention has been described in detail using the preferred embodiments, the scope of the present invention is not limited to the specific embodiments, it should be interpreted by the appended utility model claims. In addition, those of ordinary skill in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

As described above, according to the present invention, when the motor is driven and the driving shaft is rotated according to the driving condition of the vehicle, the second fastening member is moved along the slot hole formed in the vehicle mounting bracket, and thus the vehicle mounting position of the trailing arm is automatically adjusted. There is no need to use actuators and components, and the structure is simple, so it can be installed in a narrow space.

Claims (3)

A trailing arm with a wheel at one end; A mounting bracket coupled to the other end of the trailing arm in a rotatable structure by a first fastener and fixedly mounted to the vehicle body, and having a predetermined slot hole formed around the first fastener; A second fastening tool coupled to the trailing arm through a slot hole formed in the mounting bracket; A socket press-fitted to the tip of the second fastener; A motor fixedly mounted to the trailing arm and driven by an ECU; A power transmission means installed between the motor and the socket to guide the second fastening hole to be guided along the slot hole according to a driving situation of the vehicle; Trailing arm mounting position automatic adjustment device of a vehicle, characterized in that comprising a. The method of claim 1, The slotting hole is automatically adjusted to the mounting arm body mounting position of the vehicle, characterized in that consisting of a long hole having the same central axis as the central axis of the first fastener The method according to claim 1 or 2, The power transmission means, A plurality of connecting shafts connecting the motor and the socket, Automatically mounting the trailing arm body mounting position of the vehicle, characterized in that composed of a universal joint connecting the plurality of connection shafts.

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