Vehicle door opening and closing device

Abstract

The present invention provides a vehicle door opening and closing apparatus, including: a screw hinged to one of a door or a vehicle body of a vehicle; and an opening and closing module coupled to the other one of the door or the vehicle body and arranged such that the lead screw passes through the center thereof so as to close the door by moving toward one side of the lead screw or open the door by moving toward the other side, the opening and closing module including: a driving module configured to drive the lead screw to move toward one side of the lead screw; the rotating shaft provides rotating force for performing relative linear reciprocating movement relative to the lead screw; and a planetary gear reduction module transmitting the rotational force of the driving module at a set reduction ratio with respect to the lead screw, in which the lead screw is arranged at the rotation center of the driving module.

Description

TECHNICAL FIELD

[0001] The present application relates to a door opening and closing device for a vehicle, and more particularly, to a door opening and closing device for a vehicle capable of automatically opening and closing a door of a vehicle. BACKGROUND

[0002] Generally, vehicles are increasingly occupying a greater proportion in modern life, and thus, various devices are provided in vehicles, which not only improve simple driving stability or ride comfort, but also increase driver convenience.

[0003] For example, a door of a vehicle is mainly opened or closed by a passenger directly pushing or pulling the door. In this case, due to an inclination angle of a road on which the vehicle is located, it can be difficult for the passenger to push or pull the door, or due to strong wind or self-weight of the door, the door can be suddenly opened or closed.

[0004] As described above, in a case where a force required for the passenger to push or pull the door is increased or the door is suddenly opened or closed, the passenger's convenience is reduced, and the passenger or a surrounding pedestrian can be highly likely to be injured, and thus, a scheme capable of reducing the force required for the passenger to push or pull the door and preventing the door from being accidentally closed is required.

[0005] PRIOR ART DOCUMENT PATENT DOCUMENT (Patent Document 1) Japanese Laid-Open Patent Publication No. 2001-080357 (Published on March 27, 2001) SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION The present application is to solve the problems as described above, and more specifically, an object of the present application is to provide a door opening and closing device for a vehicle capable of opening or closing a door without pushing or pulling the door by a passenger.

[0007] Further, another object of the present application is to provide a vehicle actuator capable of differently controlling a friction force according to a rotation direction of a shaft when the shaft is rotated by an external force in a state where a motor is stopped.

[0008] TECHNICAL SOLUTION A door opening and closing device for a vehicle according to the present application to achieve the above-mentioned object includes a screw shaft coupled to one of a door or a body of a vehicle, and an opening and closing module coupled to the other of the door or the body, disposed so that the screw shaft penetrates a center thereof, thereby closing the door by moving to one side of the screw shaft or opening the door by moving to the other side, the opening and closing module including a driving module providing a rotational force for relative linear reciprocating movement with respect to the screw shaft, and a planetary gear reduction module transmitting the rotational force of the driving module at a set reduction ratio with respect to the screw shaft, wherein the screw shaft is disposed at a rotational center of the driving module.

[0009] The planetary gear reduction module can include a gear housing, a driving gear coupled to a rotor provided at the rotational center of the driving module, a plurality of first pinions interposed between the driving gear and the gear housing, and an output gear rotatably coupled to the first pinions and rotated by the rotational force of the first pinions to move relative to the screw shaft.

[0010] The planetary gear reduction module can include a gear housing, a driving gear coupled to a rotor provided at the rotational center of the driving module, a plurality of first pinions interposed between the driving gear and the gear housing, a carrier rotatably coupled to the first pinions at one side and rotated by the rotational force of the first pinions, a plurality of second pinions disposed at a periphery of a sun gear provided at the other side of the carrier, and an output gear rotatably coupled to the second pinions and rotated by the rotational force of the second pinions to move relative to the screw shaft.

[0011] The door opening and closing device for a vehicle can further include a shield provided to surround the screw shaft between one end of the gear housing and one end of the screw shaft.

[0012] The door opening and closing device for a vehicle can further include a bushing or a bearing supporting a front end of one side of the rotor at a front end of the other side of the gear housing.

[0013] The driving module can include a hollow rotor, a brushless direct current motor providing a rotational force to the rotor, and a motor housing surrounding an outside of the driving module and coupled to the planetary gear reduction module.

[0014] The driving module can further include a magnetic brake interposed between the other end of the rotor and the motor housing.

[0015] The magnetic brake can include a first magnet provided to an outer circumferential surface of the other end portion of the rotor, and a second magnet disposed to an inner circumferential surface of the other end portion of the motor housing to face the first magnet.

[0016] The magnetic brake can be disposed such that different polarities of the first magnet and the second magnet face each other at a set position between the rotor and the motor housing and generate an attractive force to impede rotation of the rotor.

[0017] The door opening and closing device for a vehicle can further include a bracket coupled to the other one of the door or the vehicle body, wherein the opening and closing module is rotatably coupled to the bracket.

[0018] Details of other embodiments are included in the detailed description and the accompanying drawings.

[0019] Effects of Invention The door opening and closing device for a vehicle according to the embodiment of the present invention has the following effects: First, the door can be opened and closed even without the passenger pushing or pulling the door, so the passenger's convenience can be increased, Second, the opening and closing module is configured in parallel with the rotation axis of the lead screw, so relative miniaturization and light weight can be achieved, Third, the magnetic brake is provided, so the door can be prevented from being suddenly closed against the passenger's intention.

[0020] The effects of the present invention are not limited to the above-mentioned effects, and other technical effects not mentioned can be clearly understood by those skilled in the art through the recitation of the claims. BRIEF DESCRIPTION OF DRAWINGS

[0021] The detailed description of the preferred embodiments of the present application explained below will be better understood when read in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a perspective view showing a portion of a vehicle in which a door opening and closing device for a vehicle according to an embodiment of the present invention is installed.

[0023] Figure 2 is a perspective view showing Figure 1 the door opening and closing device for a vehicle.

[0024] Figure 3 is an exploded perspective view showing Figure 2 the door opening and closing device for a vehicle.

[0025] Figure 4 is a perspective view showing whenFigure 1 FIG. 8 is a longitudinal sectional view of the vehicle door opening and closing device shown in FIG. 7, with the door closed.

[0026] Figure 5 FIG. 9 is a longitudinal sectional view of the vehicle door opening and closing device shown in FIG. 7, with the door opened. Figure 1 FIG. 9 is a longitudinal sectional view of the vehicle door opening and closing device shown in FIG. 7, with the door opened.

[0027] Figure 6 FIG. 10 is an exploded perspective view of the planetary gear reduction module of the vehicle door opening and closing device shown in FIG. 7. Figure 3 FIG. 10 is an exploded perspective view of the planetary gear reduction module of the vehicle door opening and closing device shown in FIG. 7.

[0028] Figure 7 FIG. 11 is an enlarged view of the planetary gear reduction module of the vehicle door opening and closing device shown in FIG. 7. Figure 4 FIG. 11 is an enlarged view of the planetary gear reduction module of the vehicle door opening and closing device shown in FIG. 7.

[0029] Figure 8 FIG. 12 is an enlarged view of the drive module of the vehicle door opening and closing device shown in FIG. 7. Figure 4 FIG. 12 is an enlarged view of the drive module of the vehicle door opening and closing device shown in FIG. 7.

[0030] Figure 9 FIG. 13 is an exploded perspective view of the planetary gear reduction module of the vehicle door opening and closing device according to another embodiment of the present disclosure.

[0031] REFERENCE NUMERALS DETAILED DESCRIPTION

[0032] The present application can be modified in various ways and can have various embodiments, and thus a specific embodiment will be shown and described in the drawings.

[0033] However, this is not intended to limit the present application to a specific embodiment, but should be understood to include all modifications, equivalents, or alternatives within the spirit and technical scope of the present application.

[0034] Numerical terms including "first", "second", and the like can be used to describe various constituent elements, but the constituent elements are not limited by the numerical terms.

[0035] The numerical terms are used only to distinguish one constituent element from another.

[0036] For example, a second constituent element can be referred to as a first constituent element, and similarly, a first constituent element can be referred to as a second constituent element, without departing from the scope of the present application.

[0037] The term "and / or" includes a combination of a plurality of related recitations or any one of the plurality of related recitations.

[0038] When it is mentioned that a certain constituent element is "connected" or "coupled" to another constituent element, it is understood that it can be directly connected or coupled to the other constituent element, but other constituent elements can also be present in the middle.

[0039] On the contrary, when it is mentioned that a certain constituent element is "directly connected" or "directly coupled" to another constituent element, it is understood that no other constituent element is present in the middle.

[0040] The terms used in the present application are used only to explain specific embodiments, and are not intended to limit the present application.

[0041] Unless the context clearly indicates otherwise, the singular form includes the plural form.

[0042] In the present application, the terms "include" or "have" or the like are used to designate the presence of features, numbers, steps, operations, constituent elements, components or combinations thereof described in the specification, and it should be understood that the presence or additional possibility of one or more other features, numbers, steps, operations, constituent elements, components or combinations thereof is not precluded.

[0043] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, and regardless of the reference numerals, the same or corresponding constituent elements are given the same reference numerals, and repeated description thereof will be omitted.

[0044] Figure 1 is a perspective view showing a part of a vehicle in which a vehicle door opening and closing device according to an embodiment of the present application is installed.

[0045] Referring to Figure 1 , the vehicle door opening and closing device 1 according to the embodiment of the present application is provided between the door 10 of the vehicle and the vehicle body 20, so that a passenger can open or close the door 10 without pulling or pushing the door 10 of the vehicle when getting on or off the vehicle, thereby increasing the convenience of the passenger, and in a case where it is difficult to open the door 10 due to the inclination angle of the road on which the vehicle is located or strong wind, etc., the passenger can more easily open the door 10, and the door 10 can prevent the situation where the door 10 is accidentally closed due to the inclination angle of the road or strong wind, etc. in a state where the door 10 is opened.

[0046] Figure 2 is a perspective view showing Figure 1 the vehicle door opening and closing device shown in FIG. 1, Figure 3 is an exploded perspective view showing Figure 2 the vehicle door opening and closing device shown in FIG. 1.

[0047] Referring to Figure 2 and Figure 3 , the vehicle door opening and closing device 1 can include a lead screw 100 and an opening and closing module 200.

[0048] First, the lead screw 100 can be provided in one of the door 10 or the body 20 of the vehicle, and the opening and closing module 200 can be provided in the other of the door 10 or the body 20 of the vehicle, which is opposite to the lead screw 100. In the present embodiment, a case in which one side of the lead screw 100 is fixed to the body 20 of the vehicle and the opening and closing module 200 is provided in the door 10 is described as an example, and can also be provided in positions opposite to each other.

[0049] The lead screw 100 can include a first hinge part 110 fixed to the body 20 of the vehicle and a second hinge part 120 rotatable from the first hinge part 110. The first hinge part 110 and the second hinge part 120 can provide a function of a bracket that allows the lead screw 100 to be bendably coupled to the body 20 of the vehicle. The lead screw 100 can be coupled to the inside of the end of the second hinge part 120, and one side of the guard cover 130 can be coupled to the outside.

[0050] Also, the opening and closing module 200 can include a driving module 210 and a planetary gear reduction module 220. The driving module 210 and the planetary gear reduction module 220 can be fastened to each other by a fastener F.

[0051] The driving module 210 can provide a rotational force that moves in a straight line back and forth with respect to the lead screw 100.

[0052] Further, the planetary gear reduction module 220 can transmit the rotational force of the driving module 210 at a set reduction ratio with respect to the lead screw 100. That is, the driving module 210 provides a rotational force to the planetary gear reduction module 220. The planetary gear reduction module 220 is engaged with a thread formed on the outer circumferential surface of the lead screw 100, so that the opening and closing module 200 moves in a straight line back and forth with respect to the lead screw 100, thereby allowing the door 10 to be opened and closed with respect to the body 20 of the vehicle.

[0053] At this time, the lead screw 100 can be disposed at the center of the driving module 210 and the planetary gear reduction module 220, and the lead screw 100 can be disposed in a manner that penetrates the center of the opening and closing module 200 while being capable of performing the opening and closing operation of the door 10. That is, by arranging the structure for allowing the opening and closing module 200 to move with respect to the lead screw 100 in parallel with the lead screw 100 or in parallel with the periphery of the lead screw 100, the effect of weight reduction and miniaturization of the structure of the door opening and closing device 1 for a vehicle can be achieved.

[0054] Further, the guard cover 130 can be provided between one side of the planetary gear reduction module 220 and the end of one side of the lead screw 100. The guard cover 130 can prevent the area of one side of the lead screw 100 from being exposed to the outside.

[0055] Furthermore, the opening / closing module 200 may also include a bracket 250 for attachment to the vehicle body 20. The bracket 250 allows the opening / closing module 200 to be rotatably fixed to the door 10. In this embodiment, the bracket 250 is shown as an example of being connected to the motor housing 214 of the drive module 210, but it may also be connected to the gear housing 221 of the planetary gear reduction module 220.

[0056] Figure 4 It shows when Figure 1 The diagram shows a longitudinal sectional view of the vehicle door opening and closing device when the door is closed. Figure 5 It shows when Figure 1 The diagram shows a longitudinal section of the vehicle door opening and closing device when the door is open.

[0057] Reference Figure 4 and Figure 5 According to an embodiment of the present invention, the vehicle door opening and closing device 1 rotates to one side with the lead screw 100 as the center, so that the opening and closing module 200 can close the door 10 while moving to one side closer to the lead screw 100. Conversely, by rotating the vehicle door opening and closing device 1 to the other side with the lead screw 100 as the center, the opening and closing module 200 can open the door 10 while moving to the other side closer to the lead screw 100.

[0058] At this time, when the opening / closing module 200 moves to one side of the lead screw 100, the protective cover 130 can be compressed, and when the opening / closing module 200 moves to the other side of the lead screw 100, the protective cover 130 can be stretched. Of course, regardless of the position of the opening / closing module 200, the protective cover 130 can cover the lead screw 100 from one side to the area where the opening / closing module 200 moves.

[0059] Furthermore, a stop 140 can be provided at the other end of the lead screw 100 to limit the movement distance of the opening and closing module 200.

[0060] Figure 6 It is shown Figure 3 The exploded perspective view of the planetary gear reduction module of the vehicle door opening and closing device shown. Figure 7 It is shown in a localized manner. Figure 4 An enlarged view of the planetary gear reduction module of the vehicle door opening and closing device shown.

[0061] Reference Figure 6 and Figure 7 According to an embodiment of the present invention, the planetary gear reduction module 220 of the vehicle door opening and closing device 1 may include: a gear housing 221, a drive gear 222, a first pinion 223, a planet carrier 224, a second pinion 225, and an output gear 226.

[0062] The gear housing 221 can form an outer shape of the planetary gear reduction module 220, and can form a receiving space 221a in which the driving gear 222, the first pinion gears 223, the carrier 224, the second pinion gears 225, and the output gear 226 are rotatably received. A cover 227 that blocks the receiving space 221a can be coupled to one side end of the gear housing 221, and the other side of the cover 227 can be coupled to the guard 130. An external gear 221b can be formed on the inner circumferential surface of the gear housing 221. The external gear 221b can be engaged with the planetary gear reduction module 220 described below.

[0063] Further, the driving gear 222 can be coupled to one side front end of the rotor 211 of the driving module 210 described below, and can be disposed inside the gear housing 221. The driving gear 222 can transmit the rotational force provided by the driving module 210 to the planetary gear reduction module 220.

[0064] Further, the first pinion gears 223 are disposed in plurality around the driving gear 222, and receive the rotational force of the driving gear 222. In the present embodiment, three first pinion gears 223 can be disposed at equal angles or equal intervals around the driving gear 222, and each of the first pinion gears 223 can be disposed to be engaged with the external gear 221b at the same time. Among them, the first pinion gears 223 can operate as planetary gears disposed to revolve around the driving gear 222 while rotating themselves.

[0065] Further, the plurality of first pinion gears 223 can be rotatably coupled to one side of the carrier 224, respectively. The carrier 224 can rotate the central gear 224a while the first pinion gears 223 revolve and rotate. The central gear 224a can be integrally protruded from the other side of the carrier 224.

[0066] Further, a plurality of second pinion gears 225 can be disposed around the central gear 224a at the other side of the carrier 224. The second pinion gears 225 can receive the rotational force by the rotation of the central gear 224a, and the second pinion gears 225 can be disposed to be engaged with the external gear 221b.

[0067] Further, the second pinion gears 225 can be rotatably coupled with the output gear 226. The output gear 226 can be coupled with the second pinion gears 225 in such a manner that the second pinion gears 225 can revolve and rotate, and can be formed with threads on the inner circumferential surface to be engaged with the lead screw 100. The output gear 226 can finally transmit the increased torque and low speed output to the lead screw 100.

[0068] The output gear 226 can be rotatably supported by at least one or more bearings 228 inside the gear housing 221.

[0069] A sealing member 229 for preventing foreign matter from flowing in through the front end of the rotor 211 can be provided between the output gear 226 and the central gear 224a of the carrier 224. In addition, a bushing or bearing 230 for supporting one side of the rotor 211 can be further provided in the region of the other side of the gear housing 221 adjacent to the driving module 210.

[0070] Therefore, if the driving gear 222 rotates, the first pinion 223, the carrier 224, and the second pinion 225 rotate, and finally the output gear 226 rotates, and the output gear 226 can move the opening and closing module 200 in the length direction of the lead screw 100 while rotating around the lead screw 100.

[0071] Figure 8 is a partial view Figure 4 is an enlarged view of the driving module of the vehicle door opening and closing device shown. Figure 9 is an exploded perspective view illustrating a planetary gear reduction module of a vehicle door opening and closing device according to another embodiment of the present disclosure.

[0072] Referring to Figure 9 , but the planetary gear reduction module 220 can be configured to include a gear housing 221, a driving gear 222 combined with a rotor 211 provided at the center of rotation of the driving module 210, a plurality of first pinions 223 interposed between the driving gear 222 and the gear housing 221, and an output gear 226 rotatably combined with the first pinion 223 and rotated by the rotational force of the first pinion 223 to move in relation to the lead screw 100. Of course, in this case, the first pinion 223 can be rotatably combined with the output gear 226.

[0073] Referring to Figure 8 , the driving module 210 of the vehicle door opening and closing device 1 according to an embodiment of the present disclosure can include a rotor 211, a motor 212, a motor sensor 213, and a motor housing 214.

[0074] The rotor 211 can have a shaft shape formed in a hollow manner, and can be arranged so that the lead screw 100 penetrates the inside. Of course, preferably, the rotor 211 is arranged not to interfere with the lead screw 100 inside. The rotor 211 can correspond to the output shaft of the motor 212.

[0075] Further, the motor 212 can employ a brushless direct current motor (BLDC motor). The brushless direct current motor is equipped with a stator 215, a coil 216, etc., and is equipped with a permanent magnet 217 in the rotor 211, so that the coil 216 is energized and generates a magnetic flux as the position of the permanent magnet 217, so that the rotor 211 can rotate. The structure of such a brushless direct current motor 212 is a conventional structure, and thus detailed description is omitted.

[0076] Further, the motor sensor 213 can sense a magnetic field of the permanent magnet 217 attached to the rotor 211. Thereby, the motor sensor 213 can count the number of rotations based on the sensed magnetic field of the permanent magnet 217, and can estimate the position of the lead screw 100 in the axial direction.

[0077] Also, the motor housing 214 can form the outer shape of the driving module 210, and can house the rotor 211 and the motor 212 inside. One side of the motor housing 214 can be coupled to the other side of the gear housing 221, and a magnet brake 240 can be provided at the other side.

[0078] The magnet brake 240 can include a first magnet 241 disposed in a ring shape at the other end of the rotor 211 and a second magnet 242 disposed at the inner circumferential surface of the other side of the motor housing 214. The first magnet 241 and the second magnet 242 can be arranged to face each other with respect to the circumferential direction at the other end of the rotor 211.

[0079] In the magnet brake 240, in a case where the first magnet 241 and the second magnet 242 are configured to have different polarities from each other and a magnetic force acts therebetween, the first magnet 241 and the second magnet 242 can hinder the rotation between the rotor 211 and the motor housing 214 at a set position by the magnetic force, so that the door 10 can be stopped at the set position. Here, the rotational force of the rotor 211 rotated by the motor 212 can be greater than the magnetic force of the magnet brake 240, and in a case where the rotational force of the motor 212 is blocked, the door 10 can be stopped at the set position by the magnet brake 240. Of course, the position at which the door 10 is stopped (i.e., the position at which the door 10 is stopped by the magnet brake 240) can be applied to a plurality of regions. For example, the set position at which the door 10 is stopped by the magnet brake 240 can include a position at which the door 10 is partially opened, a position at which the door 10 is half-opened, a position at which the door 10 is fully opened, etc.

[0080] The magnet brake 240 can release the magnetic force in a case where the motor 212 rotates.

[0081] If the door 10 is stopped at a set position by the magnetic brake 240, it is possible to prevent the door 10 from being opened or closed at an excessively fast speed, and in addition, it is possible to prevent the door 10 from being accidentally closed in an open state due to an external force such as wind.

[0082] Therefore, the door opening and closing device for a vehicle according to the embodiment of the present application can increase the convenience of a passenger since the door is opened and closed without the passenger pushing or pulling the door, and can achieve relatively small size and light weight since the opening and closing module is configured in parallel with the rotation axis of the screw, and can have an effect of preventing the door from being suddenly closed against the intention of the passenger by providing the magnetic brake.

[0083] The above has been described and explained in the manner of a specific embodiment for the purpose of illustratively demonstrating the technical idea of the present application, but the present application is not limited to the same structure and effect as the above-described specific embodiment, and various modifications can be implemented within the scope of the present application. Therefore, these modifications should also be considered to belong to the scope of the present application, and the scope of the present application should be determined by the claims described below.

Claims

1. A door opening and closing device for a vehicle, comprising: A lead screw, which is hinged to one of the doors or the body of a vehicle; as well as An opening / closing module, integrated with another component in the door or vehicle body, is arranged such that the lead screw passes through its center, thereby closing the door by moving it to one side of the lead screw, or opening the door by moving it to the other side. The opening / closing module includes: The drive module provides a rotational force for relative linear reciprocating movement relative to the lead screw; and The planetary gear reduction module transmits the rotational force of the drive module relative to the lead screw at a set reduction ratio. The lead screw is located at the rotation center of the drive module.

2. The vehicle door opening and closing device according to claim 1, wherein, The planetary gear reduction module includes: Gear housing; The drive gear engages with the rotor located at the rotation center of the drive module; Multiple first pinions are sandwiched between the drive gear and the gear housing; and The output gear is rotatably engaged with the first pinion and rotates by the rotational force of the first pinion to move relative to the lead screw.

3. The vehicle door opening and closing device according to claim 1, wherein, The planetary gear reduction module includes: Gear housing; The drive gear engages with the rotor located at the rotation center of the drive module; Multiple first pinions are sandwiched between the drive gear and the gear housing; The planetary carrier is rotatably engaged with the first pinion on one side and rotates by the rotational force of the first pinion; A plurality of second pinions are arranged around the central gear located on the other side of the planet carrier; and The output gear is rotatably engaged with the second pinion and rotates by the rotational force of the second pinion to move relative to the lead screw.

4. The vehicle door opening and closing device according to claim 2 or 3, further comprising: A protective cover is configured to surround the lead screw between one end of the gear housing and one end of the lead screw.

5. The vehicle door opening and closing device according to claim 2, further comprising: A bushing or bearing supports one front end of the rotor on the other front end of the gear housing.

6. The vehicle door opening and closing device according to claim 1, wherein, The driving module includes: Hollow rotor; A brushless DC motor provides rotational force to the rotor; and The motor housing surrounds the exterior of the drive module and is integrated with the planetary gear reduction module.

7. The vehicle door opening and closing device according to claim 6, wherein, The driver module also includes: A magnetic brake is clamped between the other end of the rotor and the motor housing.

8. The vehicle door opening and closing device according to claim 7, wherein, The magnetic brake includes: A first magnet is disposed on the outer peripheral surface of the other end of the rotor; and The second magnet is arranged on the inner circumferential surface of the other end of the motor housing, facing the first magnet.

9. The vehicle door opening and closing device according to claim 8, wherein, The magnetic brake is arranged such that the different polarities of the first magnet and the second magnet are opposed at a predetermined position between the rotor and the motor housing, generating an attractive force to impede the rotation of the rotor.

10. The vehicle door opening and closing device according to claim 1, further comprising: The bracket, which is attached to another component in the door or vehicle body, The opening and closing module is rotatably connected to the bracket.

Images