KR100331430B1 - Auxilliary parking brake system for automobile - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking assistance device for a vehicle, wherein when an auxiliary wheel is installed at an intermediate portion of a rear wheel and the vehicle is parked by lifting the rear of the vehicle, it is not only in the direction when the vehicle is close to the parking position, An object of the present invention is to provide a parking assistance device for an automobile that can prevent the arm and the cylinder connecting portion from being damaged by an applied load.

In order to achieve the above object, the present invention provides a rotating plate 2 installed on the bottom surface of the rear middle portion of the body B so as to be horizontally rotatable with the rotating shaft 1, and the first hinges at both ends of the bottom surface of the rotating plate 2; 3) coupled to the two first cylinder (5) having the auxiliary wheel (4) is installed at the end, and the first hinge (5) connected to the second hinge (6) and the third hinge (7) Two second cylinders (8) installed at the bottom center portion of the rotary plate (2) and the first and second cylinders (5, 8) are connected by a pipe (9) to supply hydraulic pressure to the switch (12). Hydraulic pump 10 to be turned on / off, and the rotating plate 2 is characterized in that it is configured to rotate to be installed in accordance with the vehicle parking position.

Description

Parking assistance device for car {AUXILLIARY PARKING BRAKE SYSTEM FOR AUTOMOBILE}

The present invention relates to a parking assist device for a vehicle.

In general, since the steering device of a vehicle is configured to steer only two front wheels, in order to park using the steering device as described above, only the front wheel is steered so that the steering angle is large and a relatively large parking space is required.

Therefore, a parking assistance device has been developed to facilitate parking even in a narrow parking space. As shown in FIG. 6, in order to park the vehicle in the parking space as long as the vehicle length, the left tire of the front wheel ( An auxiliary wheel 50 is installed to rotate the vehicle based on the LT).

Here, the auxiliary wheel 50 is configured to separate the rear wheel from the ground bar, which is installed as an arm 51 rotatable on the rear wheel side to have a predetermined angle θ with the front wheel as shown in Figs. An auxiliary wheel 50, a cylinder 52 provided to rotate the arm 51, a hydraulic pump 53 provided to operate by supplying / blocking hydraulic pressure to the cylinder 52, and It is comprised by the switch 54 which turns on / off the hydraulic pump 53. As shown in FIG.

Of course, the arm 51 is rotatably installed on the body (B) or the bottom of the chassis located between the rear wheels.

Referring to the operation of the parking assist device as described above, in order to park in a narrow place as shown in Figure 6, the vehicle is positioned obliquely.

When the vehicle is positioned obliquely in a narrow parking place, the switch 54 is turned on, the hydraulic pump 53 is operated, and the fluid is supplied to the cylinder 52.

When fluid is supplied to the cylinder 52, the cylinder 52 is expanded to rotate the arm 51 clockwise in FIG.

When the arm 51 is rotated in the clockwise direction, the auxiliary wheel 50 touches the ground and the rear wheel falls off the ground if the cylinder 52 continues to expand in this state.

When the rear wheel falls from the ground, the driver advances the car. The vehicle rotates around the left tire of the front wheel by the angle θ of the front wheel and the auxiliary wheel during the forward movement. Will be.

However, if the angle of the auxiliary wheels installed on the rear wheel side is fixed as described above, if the parking position is approached in the opposite direction in Fig. 6, parking is impossible, so the vehicle must be turned to the above position. Therefore, there is a problem that parking operation becomes inconvenient.

In addition, the rear wheels of the vehicle do not support the rear of the vehicle, and the auxiliary wheels support the rear of the vehicle, so that when heavy cargos are loaded on the trunk and are loaded with Han Chinese, the vehicle is inclined. There is a problem that it becomes unstable and the parking operation becomes difficult.

In addition, after the rear of the vehicle is lifted by the cylinder and the rod, the parking is performed while the rod is inclined, and an excessive load is applied to the connection portion between the rod and the cylinder, which may cause damage. .

Accordingly, an object of the present invention is to solve the above problems, and when installing the auxiliary wheel in the middle portion of the rear wheel and parking by lifting the rear of the vehicle, it is irrespective of the direction when the vehicle is close to the parking position. Rather, the present invention provides a vehicle parking assist device capable of preventing the arm and the cylinder connecting portion from being damaged by the load applied to the auxiliary wheel.

In order to achieve the above object, the present invention provides a rotating plate installed on the bottom surface of the rear middle portion of the body so as to be horizontally rotated by a rotation axis, and two auxiliary wheels installed at both ends of the rotating plate and coupled to each other by a first hinge. One cylinder, two second cylinders connected to the first cylinders as described above, and installed at the center of the bottom surface of the rotating plate with a third hinge, and connected to each other by pipes to supply hydraulic pressure to the first and second cylinders. And a hydraulic pump that is turned on / off by a switch and rotating means installed to rotate the rotating plate according to the vehicle parking position.

1 is a schematic plan view of a parking assistance apparatus for a vehicle according to the present invention;

Figure 2 is a cross-sectional view taken along line A-A in Figure 1,

Figure 3 is a schematic diagram showing an upright state of the auxiliary wheel in Figure 2,

4 is a plan view showing the angle adjusting means in FIG.

Figure 5 is a state diagram showing the angular state of the first and second auxiliary wheel in Figure 1,

6 is a schematic diagram showing a parking state of a general vehicle parking assist device;

FIG. 7 is a schematic plan view of the parking assisting device in FIG. 6; FIG.

FIG. 8 is a sectional view taken along line B-B in FIG. 7; FIG.

＊ Explanation of symbols on main parts of drawing

1: rotating shaft 2: rotating plate

3: first hinge 4: auxiliary wheel

5: 1st cylinder 6: 2nd hinge

7: hinge 3 8: cylinder 2

9, 17: piping 10: hydraulic pump

11: bearing 12: switch

13: support 14: ring gear

15: pinion 16: rack

18: drive cylinder 19: operation switch

20: switching valve 21: pressure valve

22: storage tank B: body

1, 2 and 3 is a schematic plan view showing the parking assisting device for a vehicle according to the present invention and a cross-sectional view showing a cross-sectional view of the AA line and the auxiliary wheels upright in Figure 1, the lower portion of the rear wheel middle portion of the body Two first cylinders coupled to the rotary plate 2 rotatably installed on the rotary shaft 1 and the first hinge 3 at both ends of the bottom surface of the rotary plate 2 and provided with auxiliary wheels 4 at the ends thereof. (5), two second cylinders (8) connected to the first cylinder (5) by the second hinge (6) and installed in the central portion of the bottom surface of the rotating plate (2) by the third hinge (7), A hydraulic pump 10 connected to the pipes 9 to supply hydraulic pressure to the first and second cylinders 5 and 8 and rotating means installed to rotate the rotating plate 2 according to the vehicle parking position. Consists of.

In addition, a bearing 11 is installed between the rotating plate 2 and the body B to prevent rotational friction, and a switch 12 is provided to turn on / off the hydraulic pump 10. The support 13 is provided so that the first cylinder 5 does not open to the outside of the vehicle.

As shown in FIG. 4, the rotation means includes a ring gear 14 formed on the upper surface side of the rotating plate 2 and a pinion 15 rotatably installed on the body B to be engaged with the ring gear 14 described above. And a drive cylinder 18 to which the pinion 15 is rotated, fixed to the body B, and supplied with fluid from the hydraulic pump 10 through the pipe 17. It consists of the switching valve 20 installed in the piping 17 and operated by the operation switch 19 so that the direction of the fluid applied to the said drive cylinder 18 may be changed.

In particular, the sequential supply means is provided so that the rotation angle of the rotating plate 2 may be adjusted first before the fluid is supplied to the first and second cylinders 5 and 8 when the hydraulic pump 10 is driven.

The sequential supply means is installed in the piping (9, 17) between the hydraulic pump 10 and the first and second cylinders (5, 8), the fluid is first supplied to the drive cylinder 18, the rotating plate (2) ) Is composed of a pressure valve 21 configured to rotate.

The auxiliary wheels 4 are installed to be suitable for the left and right parking angles of the vehicle, respectively, when the rotating plate 2 is rotated, which is an angle at which two auxiliary wheels 4 are arranged as shown in FIG. 5. When the vehicle is parked, the tire is used to form a radius of the center point O as the center of rotation.

In addition, the storage tank 22 is provided so that the fluid can be returned from the above-mentioned first and second cylinders 5 and 8 and the driving cylinder 18.

Referring to the operation and effect of the present invention as described above, when the driver positions the vehicle in a position as shown in Fig. 6 for parking in a relatively narrow parking position, the front wheel left tire becomes the center of rotation.

When the front wheel left tire becomes the center of rotation, the vehicle should park on the passenger seat side, for example, the driver 12 turns on the switch 12 while the driver turns on the operation switch 19.

At this time, the rotating plate 2 is in the same state as in FIG. 1, and the hydraulic pump 10 operates with the on of the switch 2 to supply fluid through the pipe 9.

The fluid supplied to the pipe 9 flows to the drive cylinder 19 side while being blocked by the pressure valve 21, and in the direction in which the drive cylinder 18 moves forward through the switch valve 20. It will work.

When the drive cylinder 18 is advanced, the pinion 15 engaged with the rack 17 is rotated clockwise, and the rotating plate 2 is rotated clockwise while the ring gear 14 engaged with the rack 17 is moved.

When the rotating plate 2 is rotated in the clockwise direction, the fluid is no longer supplied to the drive cylinder 18. In this state, the pressure of the fluid is higher than the shutoff pressure of the pressure valve 21. Fluid is supplied to the first and second cylinders 5 and 8 through the pressure valve 21.

When the fluid is supplied to the first and second cylinders 5 and 8, the first and second cylinders 5 and 8 operate as shown in FIG. 3 to lift the rear wheel of the vehicle and at the same time, the first cylinder 5. Will remain upright.

In this case, when the first cylinder 5 is raised while maintaining the upright state, the arm 51 supporting the auxiliary wheel 50 does not become inclined as in the related art. By increasing the load that the first cylinder 5 can withstand, damage to the first cylinder 5 and the second hinge 6 connecting the first cylinder 5 and the second cylinder 8 is prevented. .

When the rear wheel is lifted by the first and second cylinders 5 and 8, the driver advances the vehicle, thereby allowing the vehicle to be parked in the above-described narrow parking space as shown in FIG.

Here, when the parking position of the vehicle is in the opposite direction, that is, the driver's seat side, the driver performs the above operation in a state in which the driver turns off the direction change valve 20, so that the rotating plate 2 is counterclockwise. By rotating the vehicle, the vehicle can be parked toward the driver's seat side.

Of course, since the two auxiliary wheels 4 are installed to support the vehicle weight in a balanced manner, it is possible to solve the anxiety when operating one auxiliary wheel as in the related art.

As described above, the present invention installs a rotatable rotary plate on the bottom surface of the rear wheel side of the body, and installs two auxiliary wheels on the rotary plate, when the two auxiliary wheels support the body, the first cylinder and the second cylinder. By supporting the cylinder in an upright position, the rotation of the rotating plate has the advantage of allowing parking in a narrow position regardless of the vehicle position.

In addition, by supporting the auxiliary wheels in the state in which the first and second cylinders are upright, the rigidity to withstand the load is larger than the inclined state, so that the damage to the first and second cylinders, which are the auxiliary wheel mounting portions, can be prevented. There is this.

Claims (6)

A rotating plate installed on the bottom of the rear middle portion of the body so as to be horizontally rotated by a rotation shaft, two first cylinders coupled to both sides of the bottom surface of the rotating plate by a first hinge, and provided with auxiliary wheels at the end, and the first cylinder. Two second cylinders connected to the second hinge and installed in the center portion of the bottom surface of the rotating plate by the third hinge, and a hydraulic pump connected to the pipes to supply hydraulic pressure to the first and second cylinders, and on / off by a switch. And the rotating means installed to rotate the rotating plate according to the vehicle parking position. The method of claim 1, The rotating means includes a ring gear formed on the upper surface side of the rotating plate, a pinion rotatably installed on the body so as to be engaged with the ring gear, a rack is installed and fixed to the body to rotate the pinion, and the pipe is mounted in a hydraulic pump. Parking assist device for a vehicle, characterized in that it comprises a drive cylinder which is supplied with a fluid through the switch and the switching valve which is installed in the pipe so as to change the direction of the fluid applied to the drive cylinder is operated by the operation switch. The method according to claim 1 or 2, And a sequential supply means for supplying fluid so as to first adjust a rotation angle of the rotating plate before supplying fluid to the first and second cylinders when the hydraulic pump is driven. The method of claim 3, The sequential supply means is installed in the pipe between the hydraulic pump and the first, second cylinder, the vehicle parking assist device, characterized in that composed of a pressure valve configured to rotate the rotating plate while the fluid supplied to the drive cylinder first . The method according to claim 1 or 2, The auxiliary wheels are installed such that the angle at which the two auxiliary wheels are arranged so as to correspond to the left and right parking angles of the vehicle, respectively, when the rotating plate rotates forms a radius of the tire as the center point O as the center of rotation when the vehicle is parked. Car parking aid. The method according to claim 1 or 2, Parking support device for a vehicle, characterized in that it comprises a support installed on the body so that the first cylinder does not open to the outside of the vehicle when the first cylinder upright.