Automotive door actuation device

Abstract

The application provides a kind of automobile door actuating device.The automobile door actuating device (1) includes motor (10), transmission mechanism (20) and executor (30), the transmission mechanism (20) is drivingly connected with the motor (10) and includes first transmission mechanism (21) and second transmission mechanism, wherein the first transmission mechanism (21) is configured as a gear transmission system, the second transmission mechanism includes screw rod (22) and nut (23) which are connected via thread and displaceable relative to each other, the driving force of the motor (10) is transmitted to the gear transmission system via the input of the gear transmission system, then transmitted to the screw rod (22) and the nut (23) via the output of the gear transmission system, the executor (30) is connected with the nut (23), and the motor (10), the output of the gear transmission system and the screw rod (22) are coaxially arranged.

Description

Technical Field

[0001] This invention relates to door systems for motor vehicles, and more specifically, to door actuation devices for automobiles. Background Technology

[0002] Today, automobiles are becoming increasingly intelligent and automated to meet people's demands for comfort and safety. As an important part of a car, car doors allow passengers to enter and exit the vehicle. Typically, car doors are hinged to the car body; to open the door, passengers manually push it outwards; to close it, they manually pull it inwards. To facilitate passenger entry and exit, car door actuators have been developed that enable automatic opening and closing of car doors. These actuators, installed inside the car door, allow the door to automatically swing between open and closed positions around its rotation axis.

[0003] Considering the small thickness of car doors, which results in very limited internal installation space, there is a need to provide a car door actuation device that is simple in structure and small in size. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and compact automotive door actuation device.

[0005] This invention provides an automotive door actuation device, comprising a motor, a transmission mechanism, and an actuator. The transmission mechanism is drively connected to the motor and includes a first transmission mechanism and a second transmission mechanism.

[0006] in,

[0007] The first transmission mechanism is configured as a gear transmission system, and the second transmission mechanism includes a lead screw and a nut that are threadedly connected and movable relative to each other. The driving force of the motor is transmitted to the gear transmission system via an input component and then to the lead screw and the nut via an output component. The actuator is connected to the nut, and...

[0008] The motor, the output component of the gear transmission system, and the lead screw are arranged coaxially.

[0009] According to an embodiment of the present invention, the actuator is configured as a rod-shaped member, and one end of the rod-shaped member is positioned within the cavity of the nut, and the cavity includes an opening for the rod-shaped member to extend out.

[0010] According to an embodiment of the present invention, the cavity of the nut is configured as a spherical cavity, one end of the rod is fixed to the spherical member via a fixing member, the spherical member is adapted to and positioned in the spherical cavity, and the opening is configured to have a lateral dimension that expands in the direction toward the outside of the cavity.

[0011] According to an embodiment of the invention, the nut is configured as a separate component fastened together by fasteners.

[0012] According to an embodiment of the present invention, the spherical member includes a first groove, a second groove, and a channel portion connecting the two disposed opposite to each other in the axial direction of the rod-shaped member. The fixing member passes through the channel portion to fix the rod-shaped member at the first groove, and the second groove is adapted to the end shape of the fixing member.

[0013] According to an embodiment of the present invention, the device further includes a housing and a guide member disposed between the outer peripheral surfaces of the housing and the nut. The guide member includes a guide groove disposed on one of the housing and the nut and a displacement member disposed on the other, and the displacement member is capable of displacement along the guide groove.

[0014] According to an embodiment of the present invention, the shifting element is configured as a rolling element.

[0015] According to an embodiment of the present invention, the housing or the nut is provided with a plurality of positioning holes spaced apart along the axial direction of the lead screw, the rolling element is accommodated in the positioning holes, and the elastic element and the washer are positioned between the rolling element and the bottom wall of the positioning holes.

[0016] According to an embodiment of the present invention, the housing or the nut is provided with a plurality of positioning holes spaced apart along its circumference.

[0017] And / or,

[0018] The elastic element is constructed as a helical spring.

[0019] According to an embodiment of the present invention, a first end plate and a second end plate are further included, the first end plate and the second end plate being fixed to opposite ends of the housing along the axial direction of the lead screw. Attached Figure Description

[0020] The features, advantages, and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. In the drawings, the same symbols denote the same elements, wherein:

[0021] Figure 1 and Figure 2 An automotive door actuation device according to an embodiment of the present invention is illustrated schematically.

[0022] Figure 3 , Figure 4 and Figure 5 The diagram schematically illustrates some components of a car door actuation device according to an embodiment of the present invention.

[0023] Figure 6 , Figure 7 and Figure 8 The diagram schematically illustrates some components of a car door actuation device according to an embodiment of the present invention. Detailed Implementation

[0024] The following describes specific embodiments of the automotive door actuation device according to the present invention with reference to the accompanying drawings. The detailed description and drawings below are provided to illustrate the principles of the invention. The invention is not limited to the described preferred embodiments; the various embodiments described can be used individually or in any combination. The scope of protection of the invention is defined by the claims.

[0025] Furthermore, spatially related terms (such as "up," "down," "left," and "right") are used to describe the relative positional relationship between elements shown in the accompanying drawings and other elements. Therefore, spatially related terms can be applied to directions different from those shown in the accompanying drawings. Clearly, while all these spatially related terms refer to the directions shown in the accompanying drawings for ease of explanation, those skilled in the art will understand that directions different from those shown in the accompanying drawings can be used.

[0026] Figure 1 and Figure 2 A car door actuation device according to an embodiment of the present invention is schematically illustrated. Reference is made below. Figure 1 and Figure 2 A car door actuation device according to an embodiment of the present invention is described.

[0027] like Figure 1 and Figure 2 As shown, the present invention provides an automotive door actuation device 1, which includes a motor 10, a transmission mechanism 20, and an actuator 30. These components are described in detail below.

[0028] The motor 10, serving as the power source for the car door actuation device 1, transmits power to the actuator 30 via the transmission mechanism 20. It is understood that the motor 10 selectively drives the car door; therefore, the car door actuation device 1 includes a controller for controlling the motor 10 and sensors (both not shown) for detecting the car door. The controller communicates with the motor 10 and provides control signals to the motor 10 to start or stop the motor 10 and control the rotation direction of the motor 10. The sensor, such as a Hall sensor, is used to detect the position and / or speed of the car door and communicates with the controller. Based on the sensor signals, the controller can determine whether a passenger is manually moving the car door. If so, the controller sends a control signal to the motor 10 to start the motor 10. Subsequently, after the car door is in place, the controller sends a control signal to the motor 10 to close the motor 10. Of course, the controller can also communicate with the remote key to receive requests from passengers to open or close the car door.

[0029] like Figure 2 As shown, the automotive door actuation device 1 may include a housing 40 having a receiving cavity to accommodate a portion of the motor 10, the transmission mechanism 20, and the actuator 30. The housing 40 also includes an end through-hole for the actuator 30 to pass through. Figure 2In the illustrated automotive door actuation device 1, the actuator 30 extends from the right end of the housing 40. Therefore, an end through-hole is provided on the right end face of the housing 40 for the actuator 30 to pass through. The transmission mechanism 20 is driveably connected to the motor 10 to receive power from the motor 10 and transmit this power to the actuator 30. The transmission mechanism 20 includes a first transmission mechanism 21 and a second transmission mechanism. The first transmission mechanism 21 is configured as a gear transmission system. The second transmission mechanism includes a lead screw 22 and a nut 23. The outer circumferential surface of the lead screw 22 is provided with a threaded portion, and the nut 23 includes a threaded through-hole. The lead screw 22 passes through the threaded through-hole of the nut 23 and is connected to the nut 23 via the threaded engagement of the threaded through-hole and the threaded portion. When the motor 10 drives the lead screw 22 to rotate via the first transmission mechanism 21, the lead screw 22 rotates only and does not translate relative to the housing 40. It transmits power to the nut 23 via a threaded connection, thereby driving the nut 23 to translate along the axial direction of the lead screw 22. That is, the nut 23 only translates and does not rotate. The power transmission process of the transmission mechanism 20 is as follows: the driving force of the motor 10 is transmitted to the gear transmission system via the input component of the first transmission mechanism 21 (i.e., the input component of the gear transmission system); then, it is transmitted to the lead screw 22 via the output component of the gear transmission system, driving the lead screw 22 to rotate and thus transmitting the rotation to the nut 23, which translates along the outer circumferential surface of the lead screw 22. The actuator 30 is connected to the nut 23, thereby translating together with the nut 23 along the outer circumferential surface of the lead screw 22. Although not shown, it can be understood that the actuator 30 is also connected to the vehicle body, and when the car door moves between the open and closed positions, the actuator 30 pivots together with the car door about the transmission axis.

[0030] like Figure 1 As clearly shown, in the automotive door actuation device 1 of the present invention, the motor 10, the output of the gear transmission system, and the lead screw 22 are coaxially arranged. Thus, the automotive door actuation device 1 has a small volume, particularly a small lateral dimension. Therefore, the automotive door actuation device of the present invention has a compact lateral encapsulation structure, thereby allowing the automotive door actuation device to be incorporated into a relatively small space within the interior cavity of the automotive door.

[0031] Combination Figure 2As shown, the housing 40 can have a cuboid shape; however, this is merely an example, and the housing can also have other shapes, such as a cylinder. Furthermore, the automotive door actuation device 1 may also include a first end plate 41 and a second end plate 42, which are fixed to opposite ends of the housing 40 along the axial direction of the lead screw 22, facilitating the mounting of the first end plate 41 and the second end plate 42 onto the housing 40. Thus, the first end plate 41, the second end plate 42, and the housing 40 together define an enclosed receiving space to accommodate the motor 10, the transmission mechanism 20, and a portion of the actuator 30.

[0032] In the automobile door actuation device 1 according to an embodiment of the present invention, the actuator 30 can be configured as a rod-shaped member. For example... Figure 1 As shown, one end of the rod-shaped member is positioned within the cavity 23B of the nut 23, and the cavity 23B also includes an opening 23C for the rod-shaped member 30 to extend out. The structure of the nut 23 is further described below.

[0033] Figure 3 , Figure 4 and Figure 5 The diagram schematically illustrates some components of a car door actuation device according to an embodiment of the present invention. Reference is made below. Figure 3 , Figure 4 and Figure 5 Description of some components of the automobile door actuation device according to an embodiment of the present invention

[0034] like Figure 3 and Figure 4 As shown, the nut 23 includes a threaded through-hole 23A and a cavity 23B in the form of a spherical cavity. The cavity 23B has an opening 23C. The lead screw 22 passes through the threaded through-hole 23A to be threadedly connected to the nut 23, and the two are movable relative to each other, as described in detail above and therefore will not be repeated. In one example, as... Figure 3 As shown, the nut 23 can be constructed as a split component. Specifically, the nut 23 includes a first split portion 231 and a second split portion 232, which divide the cavity 23B into upper and lower parts. This is merely an example; the first and second split portions can also divide the cavity into left and right parts. The two split portions can then be fastened together by a fastener 233. Accordingly, the fastener 233 can be constructed as a screw, and the first and second split portions 231 and 232 can each be provided with threaded holes. The screw passes through the threaded holes and secures the first and second split portions 231 and 232 together. This is also just an example; the nut in the automotive door actuator according to the present invention is not limited to a split component with two split portions. For example, it can also be a split component with three or more split portions. Furthermore, it is understood that constructing the nut as a split component facilitates the connection operation with the actuator.

[0035] Furthermore, one end of the rod-shaped actuator 30 is fixed to the spherical member 24 via a fixing member 25. The spherical member 24 is adapted to and positioned within the spherical cavity (i.e., cavity 23B), and the opening 23C is configured to have a lateral dimension that expands in the direction toward the outside of the cavity 23B. It should be noted that, in cases such as Figure 1 In the indicated orientation, nut 23 has an opening 23C on its right end and a closed end on its left end; therefore, "facing outward of the cavity" refers to facing to the right. It is also understood that the spherical cavity with the opening design, combined with the spherical member 24, connects the actuator 30 to the nut in a manner similar to a universal joint. In the automotive door actuation device 1 of the present invention, the actuator 30 is coaxially arranged with the lead screw 22 and moves along the axial direction of the lead screw 22 together with the nut 23. However, considering the installation error between the door and the vehicle body, the actuator 30 is angularly adjusted within a certain angle range with the spherical member 24 as a pivot point; that is, it rotates within a certain angle range around the axis of the opening 23C of the cavity. This allows the actuator 30 to perform multi-angle adjustments in a plane perpendicular to its reciprocating movement, thereby accommodating installation errors between the door and the vehicle body and preventing the actuator from jamming. Therefore, the compatibility between the automotive door actuation device and the door is improved.

[0036] As one embodiment of the present invention, such as Figure 5 As shown, the spherical member 24 includes a first groove 241, a second groove 243, and a channel portion 242 connecting the two. The first groove 241 and the second groove 243 are arranged opposite to each other along the axial direction of the rod-shaped member. The fixing member 25 passes through the channel portion 242 to fix the rod-shaped member at the first groove 241, and the second groove 243 is adjacent to the end of the fixing member 25. Figure 3The shape of the first groove 243 is adapted to the shape of the left end. In one example, the fastener 25 can be constructed as a screw and has a truncated conical end. Correspondingly, the second groove 243 is constructed as a countersunk groove adapted to the truncated conical end. When the fastener 25 secures the rod to the ball 24, the end of the fastener 25 does not protrude from the surface of the ball 24. It can be understood that the shape of the second groove 243 is adapted to the end shape of the fastener 25 to ensure that the fastener does not interfere with the movement of the ball 24 in the cavity 23B. It should be noted that the shape of the second groove is not limited to the shape shown in the figure, and it can be adapted to the end shape of the fastener. For example, it can also be adapted to a cylindrical groove. In addition, the first groove 241 is constructed as a cylindrical groove, the end face of the rod abuts against the bottom surface of the first groove 241, and is fixed in the first groove 241 by the fastener 25. Of course, the above embodiments are merely examples. In the automotive door actuation device of the present invention, the fixing of the ball-shaped part in the cavity of the actuator and the nut is not limited to the above form. Other fixing parts or fixing methods that can fix the actuator and the ball-shaped part together can be used.

[0037] Figure 6 , Figure 7 and Figure 8 The diagram schematically illustrates some components of a car door actuation device according to an embodiment of the present invention. Reference is made below. Figure 6 , Figure 7 and Figure 8 The following describes some components of the automobile door actuation device according to an embodiment of the present invention.

[0038] To guide the reciprocating movement of the nut 23 on the lead screw 22, the automotive door actuation device 1 of the present invention may further include a guide member 50 between the housing 40 and the outer peripheral surface of the nut 23. Figure 7 and Figure 8As shown, the guide member 50 includes a guide groove 401 disposed on the housing 40 and a displacement member 51 disposed in a positioning hole on the outer peripheral surface of the nut 23. In one example, the displacement member 51 can be configured as a rolling element that rolls along the guide groove 401. It is understood that such a guide member with the rolling element along the guide groove has the characteristics of simple structure, high guiding accuracy, and low friction. In addition, the elastic member 53 and the washer 52 can also be positioned between the rolling element 51 and the bottom wall of the positioning hole 23D to reduce vibration and noise during the rolling of the rolling element. In one example, the elastic member 53 can be configured as a helical spring. Of course, this is just an example; disc springs and conical springs can also be used as elastic members in the guide member of the present invention. As an example of the present invention, a plurality of positioning holes 23D can be provided, which can be spaced apart along the circumferential direction of the nut 23 on the outer peripheral surface of the nut 23, and / or, the plurality of positioning holes 23D can be spaced apart along the axial direction of the nut 23 on the outer peripheral surface of the nut 23, so that the nut 23 is subjected to a uniform force applied to it by the guide member. Of course, this is just an example; the shifting component is not limited to rolling components, but can also be a sliding component. Furthermore, the guide component can also be configured as follows: the guide component includes a guide groove on the nut and a shifting component in a positioning hole on the inner circumferential surface of the housing. Its guiding principle is similar to the above embodiments and will not be repeated here.

[0039] As mentioned above, although exemplary embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the specific embodiments described above, and the scope of protection of the present invention should be defined by the claims and their equivalents.

Claims

1. A car door actuation device (1) comprising a motor (10), a transmission mechanism (20), and an actuator (30), wherein the transmission mechanism (20) is driveably connected to the motor (10) and includes a first transmission mechanism (21) and a second transmission mechanism. Its features are, The first transmission mechanism (21) is configured as a gear transmission system, and the second transmission mechanism includes a lead screw (22) and a nut (23) that are threadedly connected and displaceable relative to each other. The driving force of the motor (10) is transmitted to the gear transmission system via the input component and then to the lead screw (22) and the nut (23) via the output component. The actuator (30) is connected to the nut (23), and... The motor (10), the output component of the gear transmission system, and the lead screw (22) are arranged coaxially.

2. The automobile door actuation device (1) according to claim 1, wherein, The actuator (30) is configured as a rod, and one end of the rod is positioned within the cavity (23B) of the nut (23) and the cavity (23B) includes an opening (23C) for the rod to extend out.

3. The automobile door actuation device (1) according to claim 2, wherein, The cavity (23B) of the nut (23) is configured as a spherical cavity, one end of the rod is fixed to the spherical member (24) via a fastener (25), the spherical member (24) is adapted to and positioned in the spherical cavity (23B), and the opening (23C) is configured to have a lateral dimension that expands in the direction toward the outside of the cavity (23B).

4. The automobile door actuation device (1) according to claim 3, wherein, The nut (23) is configured as a split component fastened together by fasteners (233).

5. The automobile door actuation device (1) according to claim 4, wherein, The spherical member (24) includes a first groove (241), a second groove (243) disposed opposite to each other in the axial direction of the rod member, and a channel portion (242) connecting the two. The fixing member (25) passes through the channel portion (242) to fix the rod member at the first groove (241), and the second groove (243) is adapted to the end shape of the fixing member (25).

6. The automobile door actuation device (1) according to claim 1, wherein, It also includes a housing (40) and a guide (50) disposed between the outer peripheral surfaces of the housing (40) and the nut (23). The guide (50) includes a guide groove (401) disposed on one of the housing (40) and the nut (23) and a displacement member (51) disposed on the other, and the displacement member (51) is capable of displacement along the guide groove (401).

7. The automobile door actuation device (1) according to claim 6, wherein, The shifting element (51) is configured as a rolling element.

8. The automobile door actuation device (1) according to claim 7, wherein, The housing (40) or the nut (23) is provided with a plurality of positioning holes (23D) spaced apart along the axial direction of the lead screw (22), the rolling element is accommodated in the positioning holes (23D), and the elastic element (53) and the washer (52) are positioned between the rolling element and the bottom wall of the positioning hole (23D).

9. The automobile door actuation device (1) according to claim 8, wherein, The housing (40) or the nut (23) is provided with a plurality of positioning holes (23D) spaced apart along its circumference. And / or, The elastic element (53) is constructed as a helical spring.

10. The automobile door actuation device (1) according to claim 6, wherein, It also includes a first end plate (41) and a second end plate (42), which are fixed to the housing (40) at opposite ends along the axial direction of the lead screw (22).

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