KR20220060161A - Open and close apparatus for a tailgate of vehicle - Google Patents

Abstract

There is provided a tailgate opening/closing device for a vehicle capable of completely blocking transmission of the external force to a motor when an external force to close the tailgate is applied.
To this end, the tailgate opening/closing device for a vehicle according to the present invention includes a first tube, a second tube axially movably installed on the first tube, a motor installed in the first tube, and the first tube. A spindle shaft disposed in the inner space formed by the first tube and the second tube, rotated by the driving force of the motor, and having a male thread formed on an outer circumferential surface, and a female thread disposed in the inner space and screwed with the male screw thread are formed on the inner circumferential surface and a moving shaft for moving the second tube in the axial direction when the motor is driven, and an intermittent unit disposed between the motor and the spindle shaft, wherein the intermittent unit is installed in the first tube and has an internal It includes a fixed ring having an inner intermittent surface formed on one surface in the axial direction, and a clutch disposed in the fixed ring and moved in the axial direction according to whether the motor is driven and interrupted by the inner intermittent surface.

Description

OPEN AND CLOSE APPARATUS FOR A TAILGATE OF VEHICLE

The present invention relates to a tailgate opening/closing device for a vehicle, and more particularly, to a tailgate opening/closing device for a vehicle capable of automatically opening/closing a tailgate by a driving force of a motor.

In general, a trunk room, which is a cargo compartment, is provided at the rear of a vehicle, and a tailgate for opening and closing the trunk room is installed.

Conventionally, there is provided a locking device for holding the tailgate in a closed state, and after the locking device unlocks the tailgate, when the user directly lifts the tailgate by hand, the gas lifter is configured to support the tailgate. An in-tailgate switchgear was used.

However, recently, a 'power tailgate' that can automatically open and close the tailgate using the driving force of a motor has been developed, and the user puts his/her foot under the rear of the vehicle while carrying a heavy load, and the sensor detects the foot. And through this, the motor is operated to automatically open and close the tailgate.

International Publication No. WO2017/081277 (2017.05.18.) (hereinafter referred to as 'prior art') discloses a 'spindle driving device' that is the power tailgate. Here, for the understanding of the prior art, reference numerals will be added to the main components described in the literature of the prior art. However, since these reference numerals are not shown in the drawings of the present application, reference will be made to the literature of the prior art.

In the prior art, the spindle 11 is rotated by the driving force of the motor unit 9a, so that the flap 2, which is the tailgate of the vehicle, is automatically opened and closed.

However, it is not a problem for the owner of a vehicle in which the spindle driving device as in the prior art is installed knows the function of the spindle driving device. Attempt to manually close the flap (2). As described above, when an external force to close the flap 2 is applied to the flap 2 in the open state, the external force is transmitted to the motor unit 9a and the motor unit 9a may be damaged or broken. In the prior art, an intermittent unit 13 for preventing the external force from being transmitted to the motor unit is installed.

That is, in the prior art, when an external force to close is applied to the flap 2, as shown in FIG. 2 of the prior art document, the spindle 11 is moved downward while being reversely rotated, and accordingly, the adjusting member 18 is As the bottom moves, the spring unit 21 is compressed, and the braking response member 20 rubs against the braking member 19 by the restoring force of the spring unit 21, so that the component 15 in which the braking member 19 is installed Since reverse rotation is prevented, it is possible to prevent the external force from being transmitted to the motor unit 9a.

However, the prior art uses the friction force of the braking member 19 and the braking response member 20 to prevent the external force from being transmitted to the motor, so that the external force transmitted to the motor can be completely blocked. There was a problem that it didn't exist.

International Publication No. WO2017/081277 (2017.05.18.)

SUMMARY OF THE INVENTION An object of the present invention is to provide a tailgate opening/closing device for a vehicle capable of completely blocking transmission of an external force to a motor when an external force to close the tailgate is applied.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a tailgate opening/closing device for a vehicle according to the present invention includes a first tube, a second tube, a motor, a spindle shaft, a moving shaft, and an intermittent unit. The second tube is axially movably installed on the first tube. The motor is installed in the first tube. The spindle shaft is disposed in an inner space formed by the first tube and the second tube. The spindle shaft is rotated by the driving force of the motor. A male thread is formed on the outer peripheral surface of the spindle shaft. The moving shaft is disposed in the inner space. A female thread screwed to the male thread is formed on the inner peripheral surface of the moving shaft. The moving shaft moves the second tube in an axial direction when the motor is driven. The intermittent unit is disposed between the motor and the spindle shaft. The regulation unit is composed of a fixed ring and a clutch. The fixing ring is installed in the first tube. An inner intermittent surface is formed on one surface in the axial direction inside the fixing ring. The clutch is disposed inside the fixing ring. The clutch is moved in the axial direction according to whether or not the motor is driven and is intermittent by the inner intermittent surface.

The control unit may further include an input shaft and an output shaft. The driving force of the motor may be input to the input shaft. At least a portion of the input shaft may be inserted into the fixing ring. The output shaft may be rotated by the clutch. At least a portion of the output shaft may be inserted into the fixing ring. The output shaft may be coupled to the spindle shaft. A wedge-shaped first cam projection may be formed on one of the axial surface of the input shaft and the axial surface of the clutch, and a wedge-shaped first cam groove into which the first cam projection is inserted. can be formed. A wedge-shaped second cam projection may be formed on one of the axial surface of the output shaft and the other axial surface of the clutch, and a wedge-shaped second cam groove into which the second cam projection is inserted. can be formed.

The inner intermittent surface may be formed as a first inner locking protrusion. A second inner locking projection caught by the first inner locking projection may be formed on one surface in the axial direction of the clutch.

Each of the first inner locking projection and the second inner locking projection may be formed in a plurality of tooth shapes to form a gear surface.

The first cam protrusion may be formed of a pair of first cam protrusions disposed opposite to each other. The first cam groove may be formed of a pair of first cam grooves disposed opposite to each other. The second cam projection may be formed of a pair of second cam projections disposed opposite to each other. The second cam groove may be formed as a pair of second cam grooves disposed opposite to each other.

The tailgate opening/closing device for a vehicle according to the present invention may further include a guide tube, a main spring, and a vehicle body coupling member. The guide tube may be disposed in the inner space. The spindle shaft may be inserted into the guide tube. The moving shaft may be installed in the guide tube to be movable in an axial direction. A lower end of the main spring may be supported by a lower flange protruding radially outward from a lower end of the guide tube. An upper end of the main spring may be supported by an upper flange protruding radially outward from an upper end of the moving shaft. The vehicle body coupling member may be installed inside a lower end of the first tube. A vehicle body coupling ring may be formed on the vehicle body coupling member. The vehicle body coupling ring may be disposed to protrude outside the first tube through a hole formed in a lower end cap coupled to a lower end of the first tube. A tailgate coupling ring may be formed on the moving shaft. The tailgate coupling ring may be disposed to protrude outside the second tube through a hole formed in an upper end cap coupled to an upper end of the second tube.

A reduction gear may be further installed in the first tube. The reducer may reduce the rotation speed of the rotation shaft of the motor and transmit it to the input shaft.

Details of other embodiments are included in the detailed description and drawings.

In the tailgate opening/closing device for a vehicle according to the present invention, when the motor is driven, the clutch is moved to one side in the axial direction and is disconnected from the inner intermittent surface formed on the axial direction inside the fixing ring, so that the spindle shaft is driven by the motor. Since this rotatable, the second tube moves in the axial direction to automatically open and close the tailgate, and when the motor is not driven, the clutch moves to the other side in the axial direction and is connected to the inner intermittent surface. Since the reverse rotation of the spindle shaft is impossible, there is an effect that can completely block the external force to close the tailgate from being transmitted to the motor.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing a tailgate opening and closing device of a vehicle according to an embodiment of the present invention;
2 is a side cross-sectional view showing a lower portion of the tailgate opening and closing device of the vehicle shown in FIG. 1;
3 is a side cross-sectional view showing an upper portion of the tailgate opening and closing device of the vehicle shown in FIG. 1;
4 is a perspective view of the intermittent unit shown in FIG. 2 in detail;
5 is a partially cut-away perspective view of the intermittent unit shown in FIG. 4;
6 is an exploded perspective view of the intermittent unit shown in FIG. 5;
7 is a side view of the intermittent unit shown in FIG. 5, showing the operation of the intermittent unit when the motor is driven;
8 is a side view of the intermittent unit shown in FIG. 5 , and is a view showing the operation of the intermittent unit when the motor is not driven.

Hereinafter, a tailgate opening and closing device for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.

1 is a perspective view showing a tailgate opening/closing device for a vehicle according to an embodiment of the present invention, FIG. 2 is a side cross-sectional view showing a lower portion of the tailgate opening/closing device of the vehicle shown in FIG. 1, and FIG. 3 is the vehicle shown in FIG. It is a side cross-sectional view showing the upper part of the tailgate switchgear of

1 to 3 , the tailgate opening/closing device 1 of a vehicle according to an embodiment of the present invention is a door, which is a tail, provided at the rear of the vehicle to open and close a trunk room, which is a cargo compartment provided at the rear of the vehicle. As a device capable of automatically opening and closing a gate, two may be provided as a set. That is, one of the two tailgate opening and closing devices 1 may have a lower end installed on the left side of the vehicle body of the trunk room, an upper end may be installed on the left side of the lower surface of the tailgate, and the other one having a lower end portion of the trunk. It may be installed on the right side of the vehicle body of the room, and the upper end may be installed on the right side of the lower surface of the tailgate.

Hereinafter, only one tailgate opening/closing device 1 will be described as an example, and the tailgate opening/closing device 1 is divided according to the position of the tailgate opening/closing device 1 when the tailgate is open, and the axial direction is the same as the vertical direction. can be

The tailgate opening/closing device 1 of a vehicle according to an embodiment of the present invention includes a first tube 100 , a second tube 200 , a motor 300 , a spindle shaft 400 , a moving shaft 500 , and intermittent operation. It may include a unit 600 , a guide tube 700 , a main spring 800 , and a vehicle body coupling member 900 .

The first tube 100 may be formed in a vertical long cylindrical shape. That is, an inner space having a circular longitudinal cross-section may be formed vertically in the interior of the first tube 100 .

The second tube 200 may also be formed in a vertical elongated cylindrical shape. That is, an inner space having a circular longitudinal cross-section may be formed vertically in the inside of the second tube 200 as well.

The second tube 200 may be installed to be movable in the axial direction on the first tube 100 . In this embodiment, the upper end of the first tube 100 is inserted into the lower end of the second tube 200, and the second tube 200 is exemplified to be installed movably in the first tube 100 up and down, Since the lower end of the second tube 200 is inserted into the upper end of the first tube 100 , the second tube 200 may be installed in the first tube 100 to be movable up and down.

When the first tube 100 and the second tube 200 are in a coupled state, an internal space having a closed and circular longitudinal cross-section is formed vertically in the interior of the first tube 100 and the second tube 200. can

The lower end of the first tube 100 may be disposed below the lower end of the second tube 200 , and the upper end of the second tube 200 may be disposed above the upper end of the first tube 100 .

A vehicle body coupling ring 950 may be protruded from the lower end of the first tube 100 . The vehicle body coupling ring 950 is rotatably coupled to the vehicle body, so that when the tailgate is in an open state, the tailgate opening and closing device 1 may be supported by the vehicle body. In addition, a tailgate coupling ring 550 may be protruded from the upper end of the second tube 200 . The tailgate coupling ring 550 is rotatably coupled to the tailgate, so that when the tailgate is in an open state, the tailgate opening and closing device 1 may support the tailgate.

The motor 300 may be installed in the first tube 100 . The motor 300 may be installed at a lower portion in the first tube 100 . The lower portion of the first tube 100 has inner and outer diameters larger than those of the upper portion, so that a space in which the motor 300 can be installed can be secured inside the lower portion of the first tube 100 .

The motor 300 may be a driving source for opening and closing the tailgate. That is, the tailgate opening/closing device 1 of a vehicle according to the embodiment of the present invention may open and close the tailgate by using the driving force of the motor 300 . Specifically, when the rotation shaft of the motor 300 is rotated in one direction, the second tube 200 is moved upward with respect to the first tube 100 so that the vertical length of the tailgate opening/closing device 1 is increased and the tail The gate can be opened. In addition, when the rotation shaft of the motor 300 is rotated in the other direction, the second tube 200 is moved downward with respect to the first tube 100 , so that the vertical length of the tailgate opening and closing device 1 is reduced and the tail The gate can be closed.

A reduction gear 350 may be further installed in the first tube 100 . The reducer 350 may be disposed above the motor 300 in the first tube 100 . The reducer 350 may be formed by a combination of a plurality of gears. The input shaft of the reducer 350 may be connected to the rotation shaft of the motor 300 , and the output shaft of the reducer 350 may be connected to the input shaft 630 (refer to FIGS. 4 to 8 ) of the regulation unit 600 . The reducer 350 may reduce the rotation speed of the rotation shaft of the motor 300 and transmit it to the input shaft 630 .

The rotating shaft of the motor 300 may protrude upward of the motor 300 , the input shaft of the reducer 350 may protrude downward of the reducer 350 , and the output shaft of the reducer 350 is the reducer 350 . ), the input shaft 630 of the intermittent unit 600 may be disposed below the inner space of the intermittent unit 600, and the output shaft 640 of the intermittent unit 600, FIGS. 8) may be disposed above the inner space of the intermittent unit 600 .

The spindle shaft 400 may be disposed in an internal space formed by the first tube 100 and the second tube 200 . The spindle shaft 400 may be vertically elongated. The lower end of the spindle shaft 400 is connected to the output shaft 640 of the intermittent unit 600 , so that the spindle shaft 400 may be rotated by the driving force of the motor 300 .

The moving shaft 500 may be disposed in the inner space formed by the first tube 100 and the second tube 200 . The moving shaft 500 may be vertically elongated.

An upper portion of the spindle shaft 400 may be inserted into a lower portion of the moving shaft 500 . The moving shaft 500 may be formed by combining two parts with each other, and the inner and outer portions of the lower portion into which the spindle shaft 400 is inserted may be formed of different materials. As such, the moving shaft 500 is formed of different materials, thereby securing rigidity to support the tailgate.

A lower portion of the spindle shaft 400 may be disposed below a lower end of the moving shaft 500 , and an upper portion of the moving shaft 500 may be disposed above an upper end of the spindle shaft 400 .

A male thread may be formed on the outer peripheral surface of the spindle shaft 400 , and a female thread screwed to the male thread may be formed on the inner peripheral surface of the moving shaft 500 . Therefore, when the motor 300 is driven, the spindle shaft 400 is rotated, so that the moving shaft 500 can move in the axial direction while moving the second tube 200 in the axial direction, and through this, the tailgate can be opened and closed.

A tailgate coupling ring 550 may be formed on the moving shaft 500 . The tailgate coupling ring 550 may be formed on the upper end of the moving shaft 500 . The tailgate coupling ring 550 may be rotatably coupled to the tailgate.

An upper end cap 250 may be coupled to an upper end of the second tube 200 . The upper end cap 250 may be covered on the upper periphery of the second tube 200 . The upper end cap 250 may facilitate assembly of components installed inside the second tube 200 . The tailgate coupling ring 550 may be disposed to protrude outside the second tube 200 through a hole formed in the upper end cap 250 .

The intermittent unit 600 may be disposed between the motor 300 and the spindle shaft 400 . When an external force to close the tailgate is applied to the tailgate while the tailgate is open, the regulation unit 600 prevents the external force from being transmitted to the motor 300 , thereby preventing damage and failure of the motor 300 . can

A detailed configuration of the intermittent unit 600 will be described later with reference to FIGS. 4 to 8 , and the guide tube 700 , the main spring 800 , and the vehicle body coupling member 900 will be described first.

The guide tube 700 may be disposed in the inner space formed by the first tube 100 and the second tube 200 . The guide tube 700 may be vertically elongated. The lower end of the guide tube 700 may be fixedly installed in the first tube 100 .

In the guide tube 700 , an inner space having a circular longitudinal cross-section may be formed to be elongated vertically. The spindle shaft 400 may be inserted into the inner space of the guide tube 700 . A moving shaft 500 may be installed in the guide tube 700 to be movable in the axial direction.

A lower flange 710 may be formed to protrude outward in the radial direction at the lower end of the guide tube 700 . In addition, the upper flange 510 may be formed to protrude outward in the radial direction at the upper end of the moving shaft 500 . The lower flange 710 and the upper flange 510 may be disposed in the inner space formed by the first tube 100 and the second tube 200 .

The lower end of the moving shaft 500 may be inserted into the guide tube 700 through the upper end of the guide tube 700 .

A portion of the moving shaft 500 disposed below the upper flange 510 may be inserted into the main spring 800 through the upper end of the main spring 800 . In addition, a portion of the guide tube 700 disposed above the lower flange 710 may be inserted into the main spring 800 through the lower end of the main spring 800 .

The main spring 800 may be formed in a coil shape. The main spring 800 may be supported by the upper flange 510 and the lower flange 710 . That is, the upper end of the main spring 800 may be supported by the upper flange 510 , and the lower end of the main spring 800 may be supported by the lower flange 710 .

The vehicle body coupling member 900 may be installed inside the lower end of the first tube 100 . The vehicle body coupling member 900 may be disposed below the motor 300 in the first tube 100 .

A vehicle body coupling ring 950 may be formed on the vehicle body coupling member 900 . The vehicle body coupling ring 950 may be formed at the lower end of the vehicle body coupling member 900 . The vehicle body coupling ring 950 may be rotatably coupled to the vehicle body.

A lower end cap 150 may be coupled to a lower end of the first tube 100 . The lower end cap 150 may be covered on the lower end of the first tube 100 . The lower end cap 150 may facilitate assembly of components installed inside the first tube 100 . The vehicle body coupling ring 950 may be disposed to protrude outside the first tube 100 through a hole formed in the lower end cap 150 .

On the other hand, when the tailgate is opened and an external force to close the tailgate is applied to the tailgate while the motor 300 is not driven, the regulation unit 600 prevents reverse rotation of the spindle shaft 400, so that the tailgate It is possible to completely block the transmission of the external force acting on the gate to the motor 300 . Of course, when the motor 300 is driven, the intermittent unit 600 may enable rotation and reverse rotation of the spindle shaft 400 so that the tailgate can be opened and closed. A detailed structure of the regulation unit 600 that enables such a function will be described below.

4 is a detailed perspective view of the intermittent unit shown in FIG. 2 , FIG. 5 is a partially cut-away perspective view of the intermittent unit shown in FIG. 4 , and FIG. 6 is an exploded perspective view of the intermittent unit shown in FIG. 5 .

1 to 6 , the intermittent unit 600 may include a fixing ring 610 , a clutch 620 , an input shaft 630 , and an output shaft 640 .

The fixing ring 610 may be installed in the first tube 100 . Since the regulation unit 600 is disposed above the motor 300 and the reducer 350 in the first tube 100, the fixing ring 610 is the motor 300 and the reducer ( 350) is disposed above. The fixing ring 610 may be fixedly installed in the first tube 100 .

An inner intermittent surface 611 may be formed on one surface in the axial direction inside the fixing ring 610 , and the clutch 620 is moved in the axial direction depending on whether the motor 300 is driven to the inner intermittent surface 611 . can be intercepted (斷續, connected or disconnected) by

A first ring-shaped protrusion 612 may be formed inside the fixing ring 610 , and an inner intermittent surface 611 may be formed on an upper surface of the first ring-shaped protrusion 612 .

In addition, a second ring-shaped protrusion 613 may be formed inside the fixing ring 610 . The second ring-shaped protrusion 613 may be formed to protrude less than the first ring-shaped protrusion 612 in the radial direction. The second ring-shaped protrusion 613 may be formed wider than the first ring-shaped protrusion 612 in the axial direction. The second ring-shaped protrusion 613 may be formed to extend upwardly from the upper surface of the first ring-shaped protrusion 612 .

The inner intermittent surface 611 may be formed as a first inner locking protrusion. That is, the first inner locking protrusion may be formed in a plurality of tooth shapes to form a gear surface. Hereinafter, the inner intermittent surface 611 will be described as a first inner locking protrusion 611 .

The first inner locking projections 611 may be provided in plurality while being spaced apart from each other in the circumferential direction. The plurality of first inner locking protrusions 611 may be entirely disposed on the upper surface of the first ring-shaped protrusion 612 in the circumferential direction.

The clutch 620 may be disposed inside the fixing ring 610 . The clutch 620 may be provided with a second ring-shaped protrusion 613 .

When the motor 300 is not driven, the clutch 620 is moved to one side in the axial direction and is caught by the first inner locking protrusion 611 to prevent reverse rotation of the spindle shaft 400 . In addition, the clutch 620 may be moved to the other side in the axial direction when the motor 300 is driven and released from the first inner locking protrusion 611 to make the spindle shaft 400 rotatable. A detailed description thereof will be described later with reference to FIGS. 7 and 8 .

The driving force of the motor 300 may be input to the input shaft 630 . The input shaft 630 may be connected to the output shaft of the reducer 350 to receive the driving force of the motor 300 .

Both sides of the lower end of the input shaft 630 in the radial direction may be opened, and both sides of the upper end of the output shaft of the reducer 350 may be opened. In this case, the lower end of the input shaft 630 may be inserted into the opening formed at the upper end of the output shaft of the reducer 350 , and the upper end of the output shaft of the reducer 350 may be inserted into the opening formed at the lower end of the input shaft 630 . can

The input shaft 630 may be disposed below the inner space of the fixing ring 610 . The input shaft 630 is illustrated as being completely inserted into the inside of the fixing ring 610 in the drawing, but it is possible if at least a part of the input shaft 630 is inserted into the fixing ring 610 .

A first insertion part 631 inserted into the inner space of the first ring-shaped protrusion 612 may protrude from the center of the upper surface of the input shaft 630 . The first insertion part 631 may have a circular longitudinal cross-section.

The output shaft 640 may be rotated by the clutch 620 . The output shaft 640 may be disposed above the inner space of the fixing ring 610 . The output shaft 640 is illustrated as being completely inserted into the inside of the fixing ring 610 in the drawing, but it is possible if at least a part of the input shaft 630 is inserted into the fixing ring 610 .

A first cam protrusion 635 may be formed on an upper surface of the input shaft 630 , which is one surface in the axial direction. A first cam groove 625 may be formed on a lower surface of the clutch 620 in the axial direction. A second cam projection 645 may be formed on the lower surface of the output shaft 640 in the axial direction. A second cam groove 626 may be formed on the upper surface, which is the other surface of the clutch 620 in the axial direction. The first cam projection 635 of the input shaft 630 is inserted into the first cam groove 625 of the clutch 620 , and the second cam projection 645 of the output shaft 640 is inserted into the second cam groove of the clutch 620 ( 626 , when the input shaft 630 rotates, the clutch 620 may be rotated, and the output shaft 640 may be rotated by the clutch 620 .

Of course, the positions of the first cam protrusion 635 and the first cam groove 625 may be interchanged. That is, the first cam protrusion 635 may be formed on the lower surface of the clutch 620 , and the first cam groove 625 may be formed on the upper surface of the input shaft 630 . In addition, the positions of the second cam protrusion 645 and the second cam groove 626 may also be exchanged. That is, the second cam protrusion 645 may be formed on the upper surface of the clutch 620 , and the second cam groove 626 may be formed on the lower surface of the output shaft 640 .

In other words, the first cam projection 635 may be formed on one of the axial surface of the input shaft 630 and the one surface of the clutch 620 in the axial direction, and the first cam projection 635 may be formed on the other one. A first cam groove 625 to be inserted may be formed. In addition, a second cam projection 645 may be formed on one of the axial surface of the output shaft 640 and the other surface of the clutch 620 in the axial direction, and the second cam projection 645 is inserted into the other one. A second cam groove 626 may be formed.

Each of the first cam protrusion 635 , the first cam groove 625 , the second cam protrusion 645 , and the second cam groove 626 may be formed in a wedge shape. Accordingly, circumferential side surfaces of each of the first cam protrusion 635 , the first cam groove 625 , the second cam protrusion 645 , and the second cam groove 626 may be formed as inclined portions.

When the motor 300 is driven and the input shaft 630 is rotated, since the inclined portion of the first cam protrusion 635 pushes the inclined portion of the first cam groove 625, the clutch 620 is slightly moved upward to the first The first lock may be released from the inner locking protrusion 611 , and accordingly, as the clutch 620 rotates, the output shaft 640 rotates and the spindle shaft 400 rotates, thereby opening and closing the tailgate.

When the tailgate is opened and the motor 300 is not driven, the output shaft 640 may be reversely rotated while the spindle shaft 400 is slightly reversed by the weight of the tailgate or an external force acting on the tailgate. At this time, since the inclined portion of the second cam protrusion 645 pushes the inclined portion of the second cam groove 626, the clutch 620 is moved slightly downward and is caught by the first inner locking protrusion 6110, Accordingly, since the clutch 620 is prevented from rotating, it is possible to prevent the weight of the tailgate or an external force acting on the tailgate from being transmitted to the motor 300 .

A second insertion part 641 inserted into the inner space of the second ring-shaped protrusion 613 may protrude from the center of the lower surface of the output shaft 640 . The second insertion part 641 may have a circular longitudinal cross-section.

The output shaft 640 may be coupled to the spindle shaft 400 . Both sides of the upper end of the output shaft 640 in the radial direction may be opened, and both sides of the lower end of the spindle shaft 400 in the radial direction may be opened. In this case, the upper end of the output shaft 640 may be inserted into the opening formed at the lower end of the spindle shaft 400 , and the lower end of the spindle shaft 400 may be inserted into the opening formed at the upper end of the output shaft 640 . .

A second inner locking protrusion 621 caught by the first inner locking protrusion 611 may be formed on the lower surface of the clutch 620 in the axial direction. The second inner locking protrusion 621 may be formed in a plurality of tooth shapes to form a gear surface. The first inner locking projection 611 and the second inner locking projection 621 may form a gear surface engaged with each other.

The second inner locking protrusions 621 may be provided in plurality while being spaced apart from each other in the circumferential direction. The plurality of second inner locking protrusions 621 may be disposed entirely on the lower surface of the clutch 620 in the circumferential direction.

The upper surface of the input shaft 630 may be in contact with the lower surface of the first ring-shaped protrusion 612 . The first insertion part 631 protruding from the upper surface of the input shaft 630 may be inserted into the inner space of the first ring-shaped protrusion 612 .

A third insertion part 622 may be protruded from the center of the lower surface of the clutch 620 . The third insertion part 622 may be formed in a ring shape. In addition, a fourth insertion part 623 may be protruded from the center of the upper surface of the clutch 620 . The fourth insertion part 623 may be formed in a ring shape. The third insertion part 622 may be inserted into the inner space of the first ring-shaped protrusion 612 . The fourth insertion part 623 may be inserted into the inner space of the second ring-shaped protrusion 613 .

The second inner locking protrusion 621 may be disposed radially outward than the third inserting part 622 . The outer surface of the second inner locking protrusion 621 may be formed to extend downward from the outer peripheral surface of the clutch 620 .

A lower surface of the output shaft 640 may be in contact with an upper surface of the second ring-shaped protrusion 613 . The second insertion part 641 protruding from the lower surface of the output shaft 640 may be inserted into the inner space of the second ring-shaped protrusion 613 .

The first cam protrusion 635 may be formed on an upper surface of the first inserting part 631 , and an outer surface of the first cam protrusion 635 may extend from an outer peripheral surface of the first inserting part 631 . The first cam groove 625 may be formed on a lower surface of the third insertion part 622 .

The second cam protrusion 645 may be formed on a lower surface of the second inserting part 641 , and an outer surface of the second cam protrusion 645 may extend from an outer peripheral surface of the second inserting part 641 . The second cam groove 626 may be formed on the upper surface of the fourth insertion part 623 .

The first cam protrusion 635 may be formed of a pair of first cam protrusions 635 disposed opposite to each other. The first cam groove 625 may be formed of a pair of first cam grooves 625 disposed opposite to each other. The second cam protrusion 645 may be formed of a pair of second cam protrusions 645 disposed opposite to each other. The second cam groove 626 may be formed of a pair of second cam grooves 626 disposed opposite to each other.

FIG. 7 is a side view of the intermittent unit shown in FIG. 5 , showing the operation of the intermittent unit when the motor is driven, and FIG. 8 is a side view of the intermittent unit shown in FIG. 5 , the operation of the intermittent unit when the motor is not driven It is a drawing showing

The operation of the tailgate opening/closing device 1 of a vehicle according to an embodiment of the present invention configured as described above will be described as follows.

Referring to FIG. 7 , when the rotating shaft of the motor 300 rotates in one direction (A), the tailgate can be opened, and when the rotating shaft of the motor 300 rotates in the other direction (B), the tailgate can be closed. there is. That is, when the rotation shaft of the motor 300 is rotated in one direction (A) or the other direction (B), the input shaft 630 is also rotated in one direction (A) or the other direction (B), which is the same direction as the rotation shaft of the motor 300 . , At this time, since the inclined portions formed on both sides of the wedge-shaped first cam protrusion 635 in the circumferential direction push the inclined portions formed on both sides of the wedge-shaped first cam groove 625 in the circumferential direction in the axial direction, the clutch 620 is moved slightly in the axial direction (C) so that the second inner locking protrusion 621 is released from the first inner locking protrusion 611 of the fixing ring 610 and released.

Accordingly, since the rotation shaft of the motor 300 is rotatable in one direction (A) or the other direction (B), the rotation shaft of the motor 300 can rotate the input shaft 630 in one direction (A) or the other direction, Accordingly, since the clutch 620 and the output shaft 640 rotate in the same direction as the input shaft 630 together with the input shaft 630, the spindle shaft 400 is rotated or reversely rotated to open and close the tailgate.

Referring to FIG. 8 , on the other hand, when the tailgate is in an open state, the motor 300 is not driven. In such a state, the output shaft 640 may be rotated in the reverse direction E while the spindle shaft 400 is slightly reversed by the weight of the tailgate or an external force acting on the tailgate. At this time, the second cam protrusion Since the inclined portion of 645 pushes the inclined portion of the second cam groove 626 , the clutch 620 is slightly moved in the axial direction F so that the second inner locking projection 621 moves to the first inner locking projection 611 . ), and thus the clutch 620 is prevented from rotating in the reverse direction E, it is possible to prevent the weight of the tailgate or an external force acting on the tailgate from being transmitted to the motor 300 .

Therefore, when the tailgate is in an open state, even if an external force to close the tailgate is applied to the tailgate, the spindle shaft 400 does not rotate in reverse, so that the external force is not transmitted to the motor 300, so that the motor ( 300) to prevent damage and failure.

As described above, in the tailgate opening and closing device 1 of the vehicle according to the embodiment of the present invention, when the motor 300 is driven, the clutch 620 is moved to one side in the axial direction in the axial direction inside the fixing ring 610 . Since the connection is disconnected from the inner intermittent surface 611 formed on one surface, the spindle shaft 400 is rotatable by driving the motor 300, so that the second tube 200 is moved in the axial direction to automatically move the tailgate. It can be opened and closed, and when the motor 300 is not driven, the clutch 620 is moved to the other side in the axial direction and connected to the inner intermittent surface 611, so that the reverse rotation of the spindle shaft 400 is impossible. It is possible to completely block the transmission of the external force to close the tailgate to the motor 300 .

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

1: vehicle tailgate opening and closing device 100: first tube
150: lower end cap 200: second tube
250: upper end cap 300: motor
350: reducer 400: spindle shaft
500: moving shaft 510: upper flange
550: tailgate coupling ring 600: intermittent unit
610: fixing ring 611: inner intermittent surface
620: clutch 621: second inner locking projection
625: first cam groove 626: second cam groove
630: input shaft 635: first cam projection
640: output shaft 645: second cam projection
700: guide tube 710: lower flange
800: main spring 900: body coupling member
950: body coupling ring

Claims (7)

a first tube;
a second tube axially movably installed on the first tube;
a motor installed in the first tube;
a spindle shaft disposed in an inner space formed by the first tube and the second tube, rotated by the driving force of the motor, and having an external thread formed on an outer circumferential surface;
a moving shaft disposed in the inner space and having a female screw thread screw-coupled to the male screw thread formed on an inner circumferential surface for moving the second tube in an axial direction when the motor is driven; and
Including; intermittent unit disposed between the motor and the spindle shaft;
The control unit is
a fixing ring installed in the first tube and having an inner intermittent surface formed on one surface in the axial direction therein; and
and a clutch disposed in the fixing ring, moved in the axial direction depending on whether the motor is driven, and interrupted by the inner intermittent surface. The method according to claim 1,
The control unit is
an input shaft to which the driving force of the motor is input, at least a part of which is inserted into the fixing ring; and
An output shaft rotated by the clutch, at least a portion of which is inserted into the fixing ring, and coupled to the spindle shaft; further comprising,
A wedge-shaped first cam projection is formed on one of the axial surface of the input shaft and the axial surface of the clutch, and a wedge-shaped first cam groove into which the first cam projection is inserted is formed on the other. ,
Among the one axial surface of the output shaft and the other axial surface of the clutch, a wedge-shaped second cam projection is formed in one, and a wedge-shaped second cam groove into which the second cam projection is inserted is formed in the other. The vehicle's tailgate opening and closing device. 3. The method according to claim 2,
The inner intermittent surface is formed as a first inner locking projection,
A tailgate opening/closing device for a vehicle in which a second inner locking protrusion caught by the first inner locking protrusion is formed on one axial surface of the clutch. 4. The method according to claim 3,
Each of the first inner locking protrusion and the second inner locking protrusion is formed in a plurality of tooth shapes to form a gear surface. 5. The method according to claim 4,
The first cam projection is formed of a pair of first cam projections disposed opposite to each other,
The first cam groove is formed of a pair of first cam grooves disposed opposite to each other,
The second cam projection is formed of a pair of second cam projections disposed opposite to each other,
The second cam groove is a tailgate opening and closing device for a vehicle formed of a pair of second cam grooves disposed opposite to each other. 5. The method according to claim 4,
a guide tube disposed in the inner space, into which the spindle shaft is inserted, and the moving shaft is installed to be movable in the axial direction;
a main spring having a lower end supported on a lower flange protruding radially outwardly from a lower end of the guide tube, and an upper end supported by an upper flange protruding radially outwardly from an upper end of the moving shaft; and
Further comprising; a vehicle body coupling member installed inside the lower end of the first tube,
A vehicle body coupling ring is formed on the vehicle body coupling member to protrude outside of the first tube through a hole formed in a lower end cap coupled to a lower end of the first tube;
A tailgate opening and closing device for a vehicle having a tailgate coupling ring protruding from the second tube through a hole formed in an upper end cap coupled to an upper end of the second tube is formed on the moving shaft. 7. The method of claim 6,
and a reducer installed in the first tube and configured to reduce the rotational speed of the rotating shaft of the motor and transmit it to the input shaft.

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