KR20190065639A - Suspension system for use in vehicle - Google Patents

Abstract

The present invention provides a suspension system for use in a vehicle, which can more stably and directly control a camber in accordance with a driving state of a vehicle, and enables a control device for controlling the camber to be easily mounted. According to the present invention, the suspension system for use in a vehicle comprises: a knuckle for rotationally supporting a wheel; a lower control arm of which one end is connected to a lower end of the knuckle and the other end is connected to a frame member of the suspension system; an upper arm of which one end is connected to an upper end of the knuckle; and a joint height control device mounted on the frame member for changing a camber angle of the wheel by adjusting a joint height of the other end of the upper arm.

Description

[0001] Suspension system for USE IN VEHICLE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular suspension device, and more particularly, to a vehicular suspension device capable of stably adjusting a camber and easily attaching an apparatus for adjusting a camber.

Description of the Related Art [0002] In general, a vehicle suspension system is disposed between a vehicle body and a wheel, and uses one or a plurality of links to connect the vehicle body and a wheel. The ride comfort and the driving stability of the vehicle are prevented from being deteriorated by the external force generated by turning or the like.

Further, the camber is one of the wheel alignment elements to be considered when the wheel is attached to the vehicle, which greatly affects the turning stability of the vehicle. When viewed from the front of the vehicle, the center line of the wheel is tilted out as a positive (+) camber, and tilted inward as a negative camber. In order to satisfy both the straightness and the turning property of the vehicle, it is preferable that the camber varies within a predetermined range according to the running state of the vehicle.

2. Description of the Related Art In recent years, there has been a growing demand for a suspension device capable of improving the running, swiveling, and stability of a vehicle by appropriately adjusting the camber of the wheel in accordance with the running state of the vehicle.

The following Patent Document 1 discloses a suspension device for moving camber by moving a joint portion between a strut and a vehicle body. Patent Document 2 discloses a suspension device that adjusts a camber and a toe angle by supplying hydraulic pressure to a connecting portion between a knuckle and a lower control arm and a connecting portion between a knuckle and an assist link in accordance with a vehicle running state. The following Patent Document 3 discloses a dual link type suspension device capable of adjusting a change amount of a camber by supplying hydraulic pressure to a connecting portion between a knuckle and a lower arm.

However, there is still a need for a suspension which can adjust the camber more appropriately and stably according to the running state of the vehicle, and is easy to mount the device for adjusting the camber.

1. Korean Published Patent Application No. 10-2005-0010442 (Jan. 27, 2005) 2. Korean Patent Publication No. 10-2008-0109965 (December 18, 2008) 3. Korean Published Patent Application No. 10-2009-0132981 (December 31, 2009)

The present invention provides a vehicular suspension device capable of controlling the camber more stably and directly in accordance with the running state of the vehicle and easily mounting the adjusting device for adjusting the camber.

SUMMARY OF THE INVENTION According to an aspect of the present invention, there is provided a vehicular suspension device comprising: a knuckle for rotatably supporting a wheel; A lower control arm connected to one end of the lower end of the knuckle and connected to the frame member of the suspension; An upper arm connected to an upper end of the knuckle; And a node height adjusting device mounted on the frame member for changing the camber angle of the wheel by adjusting a node height of the other end of the upper arm.

Wherein the height adjusting device comprises: a conveying member rotatably connected to the other end of the upper arm; A rotating shaft which is rotatably threadedly engaged with a female thread portion formed in a nut hole of the body of the conveying body and on which an externally threaded portion is formed; An actuator for rotating the rotating shaft; And a regulating device body rotatably supported at one end of the rotating shaft, wherein the actuator is disposed on the regulating device body such that the driving shaft of the actuator is spaced apart from the rotating shaft.

The actuator may be disposed such that the drive shaft of the actuator is parallel to the rotation axis.

The joint height adjusting device may further include a power transmitting mechanism for transmitting the driving force of the driving shaft of the actuator to the rotating shaft.

The power transmission mechanism may include a drive pulley mounted on the drive shaft of the actuator, a driven pulley mounted on the one end of the rotation shaft, and a belt wound on the drive pulley and the driven pulley.

The power transmission mechanism may include a driving gear mounted on the driving shaft of the actuator, a driven gear mounted on the one end of the rotating shaft, and a transmission gear disposed to engage with the driving gear and the driven gear.

The power transmission mechanism may be disposed in an internal space of the regulator body, and the rotation axis and the actuator may be disposed to extend below the regulator body.

The conveying member of the nodal height adjusting device may include a slider to prevent the conveying member from rotating together with the rotation shaft, and to linearly move along the rotation shaft.

The slider may be formed in a hollow cylinder shape, and the joint height adjusting device may further include a guide shaft slidably disposed in the slider for guiding the slider.

The nodal point height adjusting device may include a rotation preventing device for preventing rotation of the rotary shaft when the conveying body is moved beyond a predetermined position along the rotary shaft.

The rotation preventing device includes a fixing stopper fixed to one surface of the body through which the nut hole is opened and a rotation stopper fixed to a part of the rotation shaft extending through the nut hole toward the one surface side to which the fixing stopper is fixed, It may also include a stopper.

Wherein the fixing stopper includes a mounting protrusion which is fitted to a mounting groove formed on the one side surface of the body, a flange portion which extends to both sides of the mounting protrusion from above and which is in close contact with the one surface, And may include protruding detent protrusions.

The contact surface of the detent projection of the fixing stopper in contact with the rotation stopper may be formed parallel to the axis of the rotation shaft.

The rotation stopper may include a ring portion fixed to the one portion of the rotation shaft and a locking portion extending from the ring portion in a direction crossing the rotation axis.

The contact surface of the engaging portion of the rotation stopper which is in contact with the contact surface of the fixing stopper may be formed as a part of a virtual plane accommodating the axis.

The suspension may be a multi-link type rear suspension.

1 is a schematic configuration diagram of a vehicular suspension device according to an embodiment of the present invention.
2 is a perspective view of a joint height adjusting device according to an embodiment of the present invention.
FIG. 3 is a perspective view of the joint height adjusting device of FIG. 2, with the housing removed.
FIG. 4 is a perspective view of the node height adjusting device of FIG. 3 in a state in which the adjusting device body is removed.
FIG. 5 is a perspective view of the joint height adjusting device of FIG. 3, with the cap removed.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described herein are for the purpose of understanding the present invention and are not intended to limit the present invention. The features described may be used in various combinations or in different embodiments.

1 is a schematic configuration diagram of a vehicular suspension device according to an embodiment of the present invention. As shown, a vehicle suspension according to an embodiment of the present invention includes a knuckle 10 for rotatably supporting a wheel W; The lower end and one end of the knuckle 10 are connected to each other by a first pin shaft 31 and the frame member 2 and the other end of the suspension device are connected by a second pin shaft 32, A lower control arm 30; An upper arm 20 connected to an upper end of the knuckle 10, for example, a first arm bush 21; The upper end of the upper arm 20 is fixed to the frame member 2 for adjusting the camber angle of the wheel W by adjusting the height of the node P of the second arm bush 22, for example. And a joint height adjusting device (100).

The suspension shown in Fig. 1 further includes a component of a suspension, for example, a coil spring and knuckle 10 disposed between the lower control arm and the vehicle body, and a shock absorber disposed between the vehicle body and the like It is possible. On the other hand, an unshown assist link, a trailing link, or the like may be further mounted between the knuckle 10 and the frame of the suspension.

The joint height adjuster 100 may be fixedly mounted to the frame member 2, for example, a rear cross member. Therefore, the distance between the joint height adjusting device 100 and the second pin shaft 32 of the lower control arm 30 is fixed. The actuator 150 of the node height adjusting device 100 is operated in accordance with a control signal from the control unit 1 capable of receiving information on the running state of the vehicle from a sensor It is possible to move the height of the joint P, which is a pivotable connecting point of the connecting bush 22 and the connecting portion 73 (see Fig. 2), in the direction of the arrow in Fig. Thus, the camber of the wheel W can be changed.

For example, at the time of a sudden turn of the vehicle, the rear outer wheel of the turn can be used as a negative camber, thereby improving the stability of adjustment of the vehicle.

2 is a perspective view of a joint height adjusting apparatus 100 according to an embodiment of the present invention. FIG. 3 is a perspective view of a state in which the housing 120 of the adjusting apparatus 100 of FIG. 2 is removed. FIG. 4 is a perspective view of the adjusting device 100 of FIG. 3 with the adjusting device body 110 removed and FIGS. 5 and 6 show the power of the adjusting device 100 of FIG. A delivery mechanism is shown.

 As shown, the adjustment device 100 includes an adjustment device body 110 forming an interior space 115 (see FIGS. 5 and 6), an actuator (not shown) extending downwardly of the adjustment device body 110 A rotary shaft 50 that extends downward to be rotatable with respect to the regulating device body 110, a conveyor 70 that linearly moves by rotation of the rotary shaft 50, sliders 751, Guide shafts 81 and 82 extending to the lower side of the adjuster body 110 to guide the drive shaft 151 of the actuator 150 to the inside of the inner space 115, And a driving force transmission mechanism for transmitting the driving force to one end (51).

The adjusting device 100 prevents the conveying member 70 from being locked at both ends of the male thread portion 52 of the rotary shaft 50 by excessive rotation of the rotary shaft 50 due to control error or inertia The rotation preventing device 90 may be provided.

The driving shaft 151 of the actuator 150 is spaced apart from the rotating shaft 50 on the same plane. If the drive shaft 151 is disposed in a straight line with the rotary shaft 50 as in the conventional art, the height of the nodal point height adjusting device is increased by at least the length of the actuator 150, It is necessary to redesign the chassis peripheral structure of the frame of the vehicle so as to avoid the occurrence of such a problem.

In this embodiment, the driving shaft 151 of the actuator 150 is parallel to and spaced apart from the rotating shaft 50, but is not limited thereto, and may be arranged in, for example, a vertical direction . In this case, the power transmission mechanism described later may be constituted by a bevel gear or the like, and the effect of lowering the height of the actuator can be achieved.

In addition, the driving shaft 151 and the rotary shaft 50 may be arranged in different planes. In this case, a power drive mechanism using a belt, which will be described later, is useful.

The arrangement relationship between the drive shaft 151 and the rotary shaft 50 of the actuator 150 can be arranged in a variety of ways other than straight lines so that it can be arranged without changing its structure to a conventional suspension device.

The upper end 51 of the rotary shaft 50 protrudes into the inner space 115 through a hole (not shown) formed in the regulating device body 110 and may be connected to the driven pulley 165 or the driven gear 163 . A male threaded portion 52 is formed on the outer surface of the portion extending downward of the regulating device body 110. The male screw portion 52 cooperates with a female screw portion (not shown) formed in the nut hole 78 of the transfer body 70 to rotate the rotary shaft 50 in a linear motion of the transfer body 70 You can switch. The first slider and the second slider 751 and 752 of the conveying member 70, which are formed in a cylindrical shape, are disposed along the first and second guide shafts 81 and 82 slidably inserted into the first and second sliders 751 and 752, .

At this time, the second arm bush 22 of the upper arm 20 rotatably connected to the connecting portion 73 of the conveying body 70 is also moved vertically (in the direction of the arrow in Fig. 1).

The anti-rotation devices 90 and 900 of the present disclosure can prevent the rotation of the rotary shaft 50 and the rotation of the actuator 50 even when the actuator 50 is continuously rotated without stopping due to, for example, And prevents rotation of the rotary shaft 50 when the conveying member 70 is moved beyond a certain position along the rotary shaft 50. [ Therefore, the problem with the conventional feed screw apparatus is not generated, and the safety of the suspension according to the present disclosure can be improved.

In the drawing, the anti-rotation devices 90 and 900 are disposed at both ends 51 and 53 of the rotary shaft 50, but the present invention is not limited thereto. For example, it may be disposed only at one end, and rotation stoppers 92 and 92a having different structures may be mounted on both ends of the rotation shaft 50, respectively.

The rotary shaft 50 extends outward through a portion where the nut hole 78 formed in the body 71 of the conveying body 70 is opened. Fixing stoppers 91 and 911 are fixed to the upper and lower surfaces of the body 71 where the nut holes 78 are opened. The fixing stopper 91 (hereinafter, the fixing stopper 911 has a similar configuration, a description thereof will be omitted) includes a mounting protrusion 93 to be inserted into the mounting groove 72 formed on the surface of the body 71, A flange portion 94 extending from the projection 93 to both sides and a detent projection 95 projecting along the axis of the rotary shaft 50 from the flange portion 94. [

The fixing stopper 91 can be fixed to the body 71 by a screw 96 fastened through the flange portion 94. Therefore, since the plurality of fixing stoppers 91 having different height of the detent protrusion 95 can be easily used, the moving section of the conveying body 70 can be easily adjusted. That is, the greater the height of the detent projection 95, the shorter the section in which the conveying body 70 can move in the direction in which the detent projection 95 extends.

The contact surface 952 (see Fig. 4) of the detent projection 95 of the fixed stopper 91 can be formed parallel to the axis of the rotary shaft 50. [ At this time, the contact surface 982 of the latching portion 98 of the rotation stopper 92, which will be described later, can be formed as a part of the virtual plane accommodating the axis of the rotation shaft 50. [

Alternatively, the contact surface 952 of the detent projection 95 may be formed as part of an imaginary plane that receives the axis 500 of the rotation axis 50. At this time, the contact surface 982 of the latching portion 98 of the rotation stopper 92 may be formed parallel to the axis of the rotary shaft 50.

Or both contacting surfaces 952 and 982 are not formed as part of the virtual plane receiving the axis but the contact surfaces formed in contact with each other are part of the virtual plane parallel to the axis of the rotating shaft 50 And an engaging portion 98 may be formed.

The contact surface 952 of the fixing stopper 91 and the contact surface 982 of the rotation stopper 92 as described above can be inclined in the advancing direction of the conveying member 70 between the contact surfaces 952 and 982 There is no contact between the two contact surfaces 952 and 982 because there is no contact between the contact surfaces 952 and 982 and the contact surfaces of both contact surfaces are parallel to the rotation axis even in the rotation direction of the rotation shaft 50. [

Since the rotation of the rotary shaft 50 is prevented by the above-described structure, the male threaded portion 52 of the rotary shaft 50 does not apply force to the swinging portion 76 of the conveying body 70, So that no locking phenomenon occurs between them.

As described above, according to the configuration of the present disclosure, since the rotation preventing device prevents the rotation shaft from rotating, the male threaded portion of the rotation shaft does not apply force to the female threaded portion of the moving body. Further, since there is no contact between the rotation stopper and the fixing stopper of the rotation prevention device due to the inclined surface with respect to the axis of the rotation shaft, the locking phenomenon does not occur and the camber can be stably controlled.

2, the regulating device 100 may further include a housing 120 capable of receiving the rotary shaft 50, the conveying body 70, and the guide shafts 81 and 82. The upper side of the housing 120 may be fixedly connected to the lower side of the regulating device body 110. One side wall of the housing 120 is provided with an opening 125 through which the connecting portion 73 of the conveying member 70 can be exposed. The opening 125 is provided with a bellows (not shown) Foreign matter penetration into the housing 120 can be prevented. Further, on the outside of the housing 120, for example, a flange portion 129 for connection to the frame member of the suspension device may be provided.

An inner space 115 and a cap 130, which can cover the power transmission mechanism, may be fixedly mounted on the upper side of the regulating device body 110.

5 and 6, the power transmission mechanism includes a drive pulley 164 mounted on a drive shaft 151 of the actuator 150 and a driven pulley 165 mounted on an upper end 51 of the rotary shaft 50, And a belt 166 wound around the drive pulley 164 and the driven pulley 165. [ Alternatively, the power transmission mechanism may include a drive gear 161 mounted on the drive shaft 151 of the actuator 150, a driven gear 163 and a drive gear 161 mounted on the upper end 51 of the rotary shaft 50, And a transmission gear 162 arranged to be engaged with the driven gear 163.

As described above, according to the suspension according to the embodiment of the present disclosure, it is possible to mount the node height adjusting device without changing the chassis structure of the existing frame peripheral portion, and the node can be set to a predetermined range It is possible to prevent the phenomenon of moving away. In addition, since the screw conveying device is prevented from being locked, an actuator capable of generating an actually required torque can be used without using a large actuator that can generate a torque larger than an actually required torque in preparation for locking, The cost can be lowered.

Although the embodiment of the present disclosure has been described above, some configurations may be easily modified or modified by those skilled in the art and replaced with other configurations. It should be noted, however, that the form thus produced may also fall within the scope of the present invention.

10 knuckles
100 node height adjuster
110 regulating body
120 housing
125 opening
130 caps
20 upper arm
21, 22 Arm Bush
30 Lower control arm
31, 32 pin axes
50 rotary shaft
51 upper end
52 male threads
53 lower end
70 transfer body
73 Connection
751, 752 slider
81, 82 Guide Shaft
90, 900 Anti-rotation device
91, 911 Fixed stopper
92, 921 Rotation stopper

Claims (16)

In a vehicle suspension device,
A knuckle for rotatably supporting the wheel;
A lower control arm connected to one end of the lower end of the knuckle and connected to the frame member of the suspension;
An upper arm connected to an upper end of the knuckle;
And a node height adjusting device mounted on the frame member for adjusting a camber angle of the wheel by adjusting a node height of the other end of the upper arm. The apparatus of claim 1, wherein the height adjusting device comprises: a conveying member rotatably connected to the other end of the upper arm; A rotating shaft which is rotatably threadedly engaged with a female thread portion formed in a nut hole of the body of the conveying body and on which an externally threaded portion is formed; An actuator for rotating the rotating shaft; And a regulating device body rotatably supported at one end of the rotating shaft,
Wherein the actuator is disposed on the regulating device body such that the driving shaft of the actuator is spaced apart in the same plane as the rotating shaft. The vehicular suspension device according to claim 1, wherein the actuator is disposed so that the drive shaft of the actuator is parallel to the rotation axis. The vehicular suspension device according to claim 3, wherein the joint height adjusting device further comprises a power transmitting mechanism for transmitting the driving force of the driving shaft of the actuator to the rotating shaft. The drive force transmission mechanism according to claim 4, wherein the power transmission mechanism includes a drive pulley mounted on the drive shaft of the actuator, a driven pulley mounted on the one end of the rotation shaft, and a belt wound on the drive pulley and the driven pulley, . The power transmission mechanism according to claim 4, wherein the power transmission mechanism includes: a driving gear mounted on the driving shaft of the actuator; a driven gear mounted on the one end of the rotating shaft; and a transmission gear arranged to engage with the driving gear and the driven gear Suspension. The vehicular suspension device according to claim 4, wherein the power transmission mechanism is disposed in an inner space of the regulating device body, and the rotating shaft and the actuator are disposed to extend to a lower side of the regulating device body. The vehicular suspension device according to claim 2, wherein the conveying member of the nodal point height adjusting device includes a slider to restrict the conveying member from rotating together with the rotation shaft, and to linearly move along the rotation shaft. The vehicular suspension device according to claim 8, wherein the slider is formed in a hollow cylinder shape, and the joint height adjusting device further comprises a guide shaft slidably disposed inside the slider to guide the slider. The vehicular suspension device according to claim 2, wherein the joint height adjusting device includes a rotation preventing device that prevents rotation of the rotation shaft when the conveying body is moved beyond a predetermined position along the rotation shaft. [10] The apparatus according to claim 10, wherein the rotation preventing device comprises: a fixing stopper fixed to one surface of the body through which the nut hole is opened; And a rotation stopper which is fixed to the part. [Claim 12] The apparatus of claim 11, wherein the fixing stopper includes: a mounting protrusion that is aligned with a mounting groove formed on the one side surface of the body; a flange portion that extends on both sides of the mounting protrusion and is in close contact with the one surface; And a detent projection projecting in the extending direction of the rotating shaft. The vehicular suspension device according to claim 11, wherein a contact surface of the detent projection of the fixing stopper in contact with the rotation stopper is formed parallel to the axis of the rotation shaft. The vehicular suspension device according to claim 11, wherein the rotation stopper includes a ring portion fixed to the one portion of the rotation shaft and a locking portion extending from the ring portion in a direction crossing the rotation axis. 15. The vehicular suspension device according to claim 14, wherein a contact surface of the engaging portion of the rotation stopper which is in contact with the contact surface of the fixing stopper is formed as a part of a virtual plane accommodating the axis. The vehicle suspension according to claim 1, wherein the suspension is a multi-link type rear suspension.

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