KR20100045784A - Squrd protecting device for vehicle - Google Patents

Abstract

PURPOSE: A squared preventing apparatus for a vehicle is provided to improve the ride comfort and stability of a vehicle by minimizing the squared phenomenon by using a stopper. CONSTITUTION: A squad protecting apparatus(1) for vehicles comprises a housing(10), a cam unit(20), a stopper(40), and a spring(50). The housing is installed to the car body frame(2) outside, and forms a through hole(11). The cam unit is installed to be able to rotate inside the housing. The stopper can move back and forth by the rotation of the cam unit. The spring offers the elastic restoring force to the stopper.

Description

Squad prevention device for vehicles {SQURD PROTECTING DEVICE FOR VEHICLE}

The present invention relates to a vehicle squad prevention device, and more particularly, is installed at a connection portion between a body frame and a trailing arm to improve riding comfort by minimizing a squad phenomenon in which the front of the vehicle is lifted and the rear sinks when the vehicle starts suddenly. It relates to a vehicle squad prevention device to make.

In general, the suspension device of the vehicle connects the axle and the vehicle body, so that vibrations or shocks received from the road surface are not directly transmitted to the vehicle body while driving the vehicle, thereby improving the riding comfort.

Such suspension systems are largely classified into an integrated axle suspension system and an independent suspension system according to the type of axle. In general, an independent suspension system is used for a passenger car that emphasizes riding comfort or maneuverability.

Among the independent suspensions, the rear suspension of the coupled torsion beam axle (CTBA) type is called 'CTBA'. Due to its relatively high running stability compared to the small weight, it has been mainly applied as a rear suspension of light and semi-medium cars.

As illustrated in FIG. 1, the CTBA type rear wheel suspension device includes a torsion beam 101 in the vehicle width direction, and a carrier 103 for mounting tires and wheels at both ends of the torsion beam 101. ), The trailing arm 105 having one side fixed thereto.

Bushings 109 and shock absorbers 107 for connecting to the body frame 200 are respectively formed at the front and rear ends of each trailing arm 105, and a spring seat 111 is formed at one rear side thereof. The spring 113 is installed between the vehicle body.

Here, the bush 109 is integrally fixed to the outer pipe 115 at the front end of the trailing arm 105, the inner pipe 117 is disposed inside the outer pipe 115, the outer pipe An insulator 119 is interposed between the 115 and the inner pipe 117 in a bonded state.

However, the conventional CTBA rear wheel suspension as described above has a problem in that a squad phenomenon occurs in which the front of the vehicle rises and the rear sinks according to the rapid start of the vehicle, thereby reducing the ride comfort, stability, and steering of the vehicle.

In addition, while the damping force of the shock absorber may be increased or the spring constant of the spring may be increased to prevent the squad phenomenon, the riding comfort of the vehicle may be further deteriorated, thereby causing a limitation in preventing the squad phenomenon.

Accordingly, the present invention has been invented to solve the above problems, and an object of the present invention is to install a cam unit and a stopper operated by the cam unit at a connection portion of the vehicle body frame and the trailing arm, It provides a vehicle squad prevention device that improves the riding comfort and stability of the vehicle by minimizing the squad of the front of the vehicle and preventing the rear of the vehicle from sinking during the rapid start of the vehicle. will be.

According to the vehicle squad prevention apparatus according to the embodiment of the present invention for achieving the above object, in the vehicle squad prevention apparatus for preventing the squad phenomenon that the front of the vehicle is lifted, the rear sinks during the rapid start of the vehicle, the trail A bush composed of an outer pipe, an inner pipe, and an insulator is mounted at the tip of the ring arm, and is mounted to the outside of the body frame in which a hole is formed corresponding to the bush at a connection portion between the bush and the body frame, A housing having a through hole formed at the same position as the hole; A cam unit rotatably mounted in the housing; A stopper having a front end inserted into the hole and the through hole at a predetermined interval in the housing, and the other end being in contact with the cam unit to be reciprocated forward and backward by a rotation operation of the cam unit; One end is connected to the upper and lower portions of the other end of the stopper, respectively, and the other end is connected to the inner upper and lower portions of the housing, respectively, to provide an elastic restoring force to the stopper.

The cam unit includes a mounting rod mounted inside the housing; And a cam rotatably fitted to a center of the mounting rod, the cam having an outer circumferential surface in contact with the other end of the stopper. And a driving means mounted in the housing to rotate the cam according to a signal of the ECU.

The driving means is mounted on the opposite side of the through hole in the housing, the drive motor controlled by the ECU; A drive gear mounted to the front end of the rotation shaft of the drive motor; And a driven gear mounted on one surface rotation center of the cam corresponding to the drive gear and engaged with the drive gear.

The outer pipe of the bush may have a locking end formed on one side of the outer circumferential surface corresponding to the lower portion of the hole so as to be caught by the front end of the stopper when the stopper moves forward.

The stopper may be equipped with an impact preventing member in the front end portion in contact with the engaging end of the outer pipe.

The impact preventing member is preferably made of a rubber material.

According to the squad prevention device for vehicles according to the present invention as described above, by providing a stopper operated by the cam unit and the cam unit in the connection portion of the vehicle body frame and the trailing arm, when the vehicle starts quickly through the operation of the stopper To prevent the swivel of the trailing arm, the front of the vehicle is lifted and the rear sinks.

In addition, the vehicle squad prevention apparatus according to an embodiment of the present invention by minimizing the squad phenomenon of the vehicle generated at the time of departure, there is also an effect to improve the riding comfort, stability and controllability of the vehicle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

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

2 is a configuration diagram of a vehicle squad prevention apparatus according to an embodiment of the present invention, Figure 3 is a step-by-step operating state diagram of a vehicle squad prevention apparatus according to an embodiment of the present invention.

Referring to the drawings, the vehicle squad prevention device 1 according to an exemplary embodiment of the present invention is a cam unit 20 and the cam unit 20 at the connection of the body frame 2 and the trailing arm 3 By installing the stopper 40 which is operated by the stopper 40, the front of the vehicle is lifted through the operation of the stopper 40 to minimize the squad phenomenon that the rear of the vehicle sinks and the rear sinks, thereby improving the ride comfort and stability of the vehicle. Let's do it.

To this end, the vehicle squad prevention device 1 according to an embodiment of the present invention, the vehicle body frame 2 and the trailing arm (2) in order to prevent the squad phenomenon that the front of the vehicle is lifted and the rear sinks when the vehicle is suddenly started. It is installed to the connecting portion of 3), basically comprises a housing 10, the cam unit 20, the stopper 40, and the spring 50, which will be described in more detail for each configuration as follows.

First, a bush composed of an outer pipe 4 and an inner pipe 5 and an insulator 6 interposed between the outer pipe 4 and the inner pipe 5 at the tip of the trailing arm 3. 7) is mounted.

The bush 7 is mounted at the tip of the trailing arm 3 and connected to the body frame 2 and the mounting bracket 8.

In the present embodiment, as shown in FIG. 2, as shown in FIG. 2, a hole H is formed corresponding to the bush 7 at a connection portion between the bush 7 and the vehicle body frame 2. It is mounted on the outside of the vehicle body frame (2).

The housing 10 has a through hole 11 formed at the same position as the hole H.

In the present embodiment, the cam unit 20 is rotatably mounted in the housing 10.

The cam unit 20 is composed of a mounting rod 21, a cam 23, and the drive means 25.

First, the mounting rod 21 is mounted in the same direction as the width direction of the vehicle inside the housing 10.

The center of the cam 23 is rotatably fitted to the mounting rod 21.

The cam 23 is formed in an oval shape, and an outer circumferential surface thereof is in contact with the other end of the stopper 40.

The driving means 25 is mounted inside the housing 10 to rotate the cam 23 according to a control signal of the ECU 27.

The drive means 25 is composed of a drive motor 29, a drive gear 31, and a driven gear 33.

The drive motor 29 is mounted on the opposite side of the through hole 11 in the housing 10 and controlled by the ECU 27.

Here, the drive motor 29 is preferably made of a servo motor capable of controlling the rotational direction and the rotational speed of the rotary shaft.

The drive gear 31 is mounted to the front end of the rotation shaft of the drive motor 29.

In addition, the driven gear 33 is mounted at one surface rotation center of the cam 23 corresponding to the drive gear 31 and meshes with the drive gear 31.

That is, the driven gear 33 is integrally mounted to one surface rotation center of the cam 23 in a state of being fitted to the mounting rod 21, and the rotational force of the driving motor 29 is driven from the driving gear 31. The cam 23 is rotated by the transmission.

In this embodiment, the stopper 40 is inserted into the hole (H) and the through-hole 11 for a predetermined period in the interior of the housing 10, the other end of the cam 23 of the cam unit 20 ) Is mounted to be movable by the rotation operation of the cam (23).

Here, the outer pipe 4 of the bush 7 is caught by the hole H so as to be caught by the front end of the stopper 40 when the stopper 40 moves forward by the rotation operation of the cam unit 20. A locking end 9 is formed on one side on the outer circumferential surface corresponding to the lower portion of the lower surface.

In addition, the stopper 40 is equipped with an impact preventing member 41 at the tip portion that is in contact with the engaging end 9 of the outer pipe (4).

When the impact preventing member 41 is in contact with the locking end 9 of the outer pipe 4, the material is preferably made of a rubber material to minimize friction and impact.

In this embodiment, one end of the spring 50 is connected to the upper and lower portions of the other end of the stopper 40, and the other end is connected to the inner upper and lower portions of the housing 10, respectively, so that the stopper ( 40 to provide elastic restoring force.

That is, each spring 50 has a rotation center and the longest distance (L1) of the outer circumferential surface of the cam 23 that is in contact with the other end of the stopper 40 by rotating the cam 23 of the cam unit 20 As the stopper 40 moves forward, the tensioned state is maintained.

On the other hand, when the cam 23 is rotated such that the outer circumferential surface of the cam 23 corresponding to the other end of the stopper 40 becomes the center of rotation and the shortest distance L2, the springs 50 are compressed again and the By providing an elastic restoring force to the stopper 40 such that the lower end of the stopper 40 is in contact with the cam 23, the stopper 40 is returned to the initial position.

Therefore, the stopper 40 is in contact with the outer circumferential surface of the cam 23 by the tension and compression of the respective springs 50 to maintain a state of always in contact.

Hereinafter, the operation and action of the vehicle squad prevention device 1 according to an embodiment of the present invention configured as described above will be described in detail.

3 is a step-by-step operational state diagram of the squad prevention apparatus for a vehicle according to an embodiment of the present invention.

First, during normal driving of the vehicle, as shown in FIG. 3 (S1), the cam unit 20 is not operated by the control signal of the ECU 27.

Accordingly, the stopper 40 and the spring 50 maintain an initial mounting state in the housing 10, and the trailing arm 3 absorbs vibration generated when the vehicle is driven. Absorbed through.

On the other hand, at the time of rapid start after the vehicle stops, the driving motor 29 is operated by the control signal of the ECU 27 as shown in FIG. 3 (S2).

Then, the cam 23 is rotated by receiving the rotational force of the drive motor 29 through the driven gear 33 engaged with the drive gear 31, the cam 23 in contact with the other end of the stopper 40. When the outer circumferential surface of) becomes the center of rotation and the longest distance L1, the ECU 27 stops the rotation of the driving motor 29.

Accordingly, the stopper 40 is advanced by the cam 23, and the front end portion of the stopper 40 passes through the through hole 11 and the hole H and is inserted into the body frame 2. Done.

At this time, the spring 50 is connected to the other end of the stopper 40 to maintain a tensioned state.

Here, the trailing arm (3) is to be rotated to the lower portion of the vehicle in response to the rapid start of the vehicle, the impact reducing member is mounted on the end of the stopper 40, the locking end 9 of the bush (7) In contact with 41, rotation is prevented.

That is, the cam unit 20 advances the stopper 40 such that the stopper 40 and the engaging end 9 come into contact with each other by the rotational operation of the cam 23. This prevents rotation.

Accordingly, when the rapid start, the front of the vehicle is lifted and the rear of the vehicle sinks to minimize the squad phenomenon.

After minimizing the squad phenomenon of the vehicle, the driving motor 29 is rotated again by the control signal of the ECU 27 to rotate the cam 23 to the initial position.

Then, the cam 23, as shown in (S1) of Figure 3, the outer peripheral surface corresponding to the other end of the stopper 40 becomes the center of rotation and the shortest distance (L2), at this time, the spring 50 that was tensioned ) Is compressed again, returning the stopper 40 to the initial position.

That is, the spring 50 provides elastic restoring force to the stopper 40 so that the other end of the stopper 40 is always in contact with the outer circumferential surface of the cam 23.

Accordingly, when the vehicle squad prevention device 1 according to the embodiment of the present invention configured as described above is applied, the cam unit 20 controlled by the ECU 27 is stopped at the stopper 40 at the time of rapid start of the vehicle. As the front of the trailing arm 3 is brought into contact with the engaging end 9 of the bush 7 mounted at the tip of the trailing arm 3, the front of the vehicle is lifted and the rear is prevented by preventing the trailing arm 3 from rotating. This will minimize the sinking squad.

In addition, the squad prevention apparatus for a vehicle according to an embodiment of the present invention improves the riding comfort, stability, and maneuverability of the vehicle by minimizing a squad phenomenon of the vehicle generated at the time of rapid start.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this and is given by the person of ordinary skill in the art to the following, Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a perspective view of a typical coupled torsion beam axle (CTBA) suspension.

2 is a block diagram of a squad prevention apparatus for a vehicle according to an embodiment of the present invention.

3 is a step-by-step operational state diagram of the squad prevention apparatus for a vehicle according to an embodiment of the present invention.

Claims (6)

In the vehicle squad prevention device for preventing the squad phenomenon that the front of the vehicle is lifted and the rear sinks at the time of rapid start of the vehicle, A bush consisting of an outer pipe, an inner pipe, and an insulator is mounted at the tip of the trailing arm, and is mounted to the outside of the body frame in which a hole is formed corresponding to the bush at a connection portion between the bush and the body frame, A housing having a through hole formed at the same position as the hole; A cam unit rotatably mounted in the housing; A stopper having a front end inserted into the hole and the through hole at a predetermined interval in the housing, and the other end being in contact with the cam unit to be reciprocated forward and backward by a rotation operation of the cam unit; And One end is connected to each of the upper and lower portions of the other end of the stopper, and the other end is connected to the upper and lower inner portions of the housing, respectively, the squad prevention device including a spring to provide an elastic restoring force to the stopper. The method of claim 1, The cam unit is A mounting rod mounted inside the housing; And A center rotatably fitted to the mounting rod, the cam being formed in an oval shape and having an outer circumferential surface in contact with the other end of the stopper; And And a driving means mounted in the housing to rotate the cam in response to a signal from the ECU. The method of claim 2, The driving means A drive motor mounted on an opposite side of the through hole inside the housing and controlled by the ECU; A drive gear mounted to the front end of the rotation shaft of the drive motor; And Squad prevention device for a vehicle, characterized in that formed in the center of rotation of the cam corresponding to the drive gear, driven gear meshing with the drive gear. The method of claim 1, The outer pipe of the bush is a vehicle squad prevention device, characterized in that the engaging end is formed on one side on the outer circumferential surface corresponding to the lower end of the hole when the stopper is moved forward. The method of claim 4, wherein The stopper is a vehicle squad prevention device, characterized in that the shock-resistant member is mounted to the front end portion in contact with the engaging end of the outer pipe. The method of claim 3, The impact preventing member is a vehicle squad prevention device, characterized in that the material is made of a rubber material.

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