Electric side door opening driving mechanism, vehicle door and control method

Abstract

The invention discloses an electric side door opening driving mechanism, an automobile door and a control method, and relates to the technical field of automobile doors, the electric side door opening driving mechanism comprises a driving motor and a connecting rod mechanism, and the driving motor is used for being arranged in a non-bearing area cavity of a side wall A column / B column; the connecting rod mechanism comprises a first connecting rod assembly and a second connecting rod assembly, one end of the first connecting rod assembly is connected with the driving motor, the other end of the first connecting rod assembly is connected with one end of the second connecting rod assembly, the other end of the second connecting rod assembly is connected with a hinge, and the hinge is used for being connected with a car door metal plate. Wherein the driving motor rotates forwards and backwards to drive the first connecting rod assembly to move, so that the second connecting rod assembly pushes and pulls the vehicle door. The driving motor is embedded into the non-bearing area cavity of the side wall A column / B column, the thickness of the vehicle door can be reduced, and the space in the vehicle is released.

Description

Technical Field

[0001] This invention relates to the field of automotive door technology, and in particular to an electric side door opening drive mechanism, a door, and a control method. Background Technology

[0002] Currently, electric door drive mechanisms (such as motors and gearboxes) are generally integrated inside the door, often employing rack and pinion or worm gear transmissions. The motor drives the rack and pinion or worm gear to open and close the door. Because the drive mechanism is located inside the door, the door thickness increases by 20% to 30%, encroaching on passenger compartment space and affecting lightweight design, thus reducing the space utilization of the passenger compartment. Furthermore, rack and pinion or worm gear transmission schemes have low mechanical efficiency and result in energy loss. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an electric side door opening drive mechanism and a car door, wherein the drive motor is embedded in the non-load-bearing cavity of the A-pillar / B-pillar of the side wall, which can reduce the thickness of the car door and free up interior space.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, embodiments of the present invention provide an electric side door opening drive mechanism, comprising: A drive motor is installed inside the non-load-bearing cavity of the side A-pillar / B-pillar. The linkage mechanism includes a first linkage assembly and a second linkage assembly. One end of the first linkage assembly is connected to a drive motor, and the other end of the first linkage assembly is connected to one end of the second linkage assembly. The other end of the second linkage assembly is connected to a hinge, which is used to connect the door sheet metal. The drive motor can rotate in both directions to move the first linkage assembly, thereby causing the second linkage assembly to push or pull the door.

[0005] As a further implementation, the first link assembly includes a first link, the second link assembly includes a second link, and the second link is connected to the first link and the second link to the hinge respectively by ball head bolts and ball socket structures.

[0006] As a further implementation, the second link passes through a hole opened in the side A-pillar / B-pillar, and a dust cover is installed on the side of the second link corresponding to the hole.

[0007] As a further implementation, the dust cover has a flared structure, and the narrow end of the dust cover is interference-fitted with the second connecting rod.

[0008] As a further implementation, the hinge includes a fixed part and a movable part that are rotatably connected together, the fixed part being used to connect to the vehicle body and the movable part being used to connect to the vehicle door; The second link assembly is connected to the moving part.

[0009] As a further implementation, the axis of the drive motor is perpendicular to the first link and the second link.

[0010] Secondly, embodiments of the present invention also provide a vehicle door equipped with the aforementioned electric side door opening drive mechanism.

[0011] As a further implementation, an ECU is also included, which controls the drive motor to rotate forward or backward according to the door closing or opening command.

[0012] Thirdly, embodiments of the present invention also provide a method for controlling a vehicle door, including: Door closing process: The ECU receives the door closing command and controls the drive motor to rotate. The drive motor pulls the door to close through the first link assembly and the second link assembly. Door opening process: The ECU receives the door opening command, controls the drive motor to reverse, and the drive motor pushes the door open through the first link assembly and the second link assembly.

[0013] As a further implementation, the door closing command includes at least one of a physical button, a mobile app, and a Bluetooth key; During the door opening process, the self-closing lock is controlled to open via button, remote control, or foot kick trigger signal, and the opening signal is transmitted to the ECU.

[0014] The beneficial effects of this invention are as follows: (1) The electric side door opening drive mechanism of the present invention includes a drive motor and a linkage mechanism. The drive motor is located in the non-load-bearing cavity of the side A-pillar / B-pillar, which can reduce the thickness and weight of the door and free up interior space.

[0015] (2) The present invention uses different forms of first and second links. The second link is interference-fitted with the dust cover, and the second link is fitted with the through hole opened in the side A-pillar / B-pillar through the sealing ring to achieve effective sealing in the drive mechanism envelope area and extend service life.

[0016] (3) The ECU of the present invention controls the drive motor to rotate according to the door closing command sent by the physical button, mobile APP and Bluetooth key. The drive motor pulls the door to close through the first link and the second link. It also sends an unlocking command to the self-closing lock according to the button / remote / kick trigger signal. After the self-closing lock is unlocked, it sends a signal to the ECU, which then controls the drive motor to reverse. The first link and the second link work together to push the door open. Through the cooperation of the ECU with the physical button, mobile APP, Bluetooth key and self-closing lock, the rapid control of the door opening and closing can be realized. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is an installation diagram of the electric side door opening drive mechanism according to one or more embodiments of the present invention; Figure 2 This is a schematic diagram of the overall structure of the electric side door opening drive mechanism according to one or more embodiments of the present invention; Figure 3 This is a control logic diagram of the electric side door opening drive mechanism according to one or more embodiments of the present invention.

[0019] Among them, 1. door sheet metal, 2. connecting bolts, 3. hinges, 4. second link assembly, 5. side A-pillar / B-pillar, 6. drive motor, 7. first link assembly, 8. mounting bracket; 31. Moving part; 32. Second ball head bolt; 33. Fixing part; 41. Ball socket; 42. Second connecting rod; 43. Dust cover; 71. First connecting rod; 72. First ball head bolt. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0022] Example 1: This embodiment provides an electric side door opening drive mechanism, such as... Figure 1 and Figure 2As shown, it includes a drive motor 6 and a linkage mechanism. Under the action of the drive motor 6, the linkage mechanism realizes the opening and closing of the car door by pushing and pulling, which can improve transmission efficiency and reduce energy consumption. In addition, the drive motor 6 is embedded in the non-load-bearing cavity of the side A-pillar / B-pillar 5, which can free up the internal space of the car door, realize the thinning of the car door and the weight reduction of the mechanism.

[0023] When the drive motor 6 is installed on the A-pillar, the non-load-bearing cavity can be the non-stressed area at the connection with the windshield; when the drive motor 6 is installed on the B-pillar, the non-load-bearing cavity can be the non-stressed area at the connection with the door.

[0024] The linkage mechanism includes a first linkage assembly 7 and a second linkage assembly 4. One end of the first linkage assembly 7 is connected to the drive motor 6 (including a reducer), and the other end is connected to one end of the second linkage assembly 4. A hinge 3 is installed on the other end of the second linkage assembly 4, and the hinge 3 is connected to the door sheet metal 1. The reducer can reduce the high speed output of the drive motor 6, realizing low-speed and stable opening and closing of the door. The drive motor 6 has a built-in Hall sensor to monitor the motor speed and position in real time and feeds pulse signals back to the ECU to ensure stable door operating speed.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the first link assembly 7 includes a first link 71 and a first ball head bolt 72, and the second link assembly 4 includes a second link 42 and a ball socket 41. One end of the first link 71 is connected to the reducer shaft of the drive motor 6 through a coupling, and the other end of the first link 71 is engaged with the ball socket 41 at one end of the second link 42 through the first ball head bolt 72. The other end of the second link 42 is connected to the second ball head bolt 32 through the ball socket 41, and the second ball head bolt 32 is connected to the hinge 3.

[0026] In this embodiment, lubricating oil is applied inside the ball joint 41 to reduce the risk of abnormal noise. The first connecting rod 71 is provided with a threaded hole for threaded connection with the first ball head bolt 72; the size of the threaded hole is set according to actual requirements, such as a tapped M8 threaded hole. The axial direction of the drive motor 6 is parallel to the axial direction of the first ball head bolt 72 and the second ball head bolt 32, and perpendicular to the first connecting rod 71 and the second connecting rod 42, ensuring a reasonable installation position of the drive motor 6 in the non-load-bearing cavity of the side A-pillar / B-pillar 5.

[0027] like Figure 1As shown, the second connecting rod 42 passes through a hole in the side A-pillar / B-pillar 5, and a sealing ring is installed at the hole. A dust cover 43 is installed on the outside of the hole, positioned on the side of the side A-pillar / B-pillar 5 near the hinge 3. The dust cover 43 and the sealing ring work together to achieve sealing within the enveloping area of ​​the drive mechanism. In this embodiment, the dust cover 43 has a flared structure; its wide end fits with the side A-pillar / B-pillar 5, and its narrow end is press-fitted with the second connecting rod 42, ensuring a secure installation of the dust cover 43.

[0028] In this embodiment, the length of the second link 42 is greater than the length of the first link 71. The second link 42 can act as a lever arm to amplify the output torque of the drive motor 6. Furthermore, the first link 71 and the second link 42 have different shapes. The first link 71 is a plate-like structure with arcs at both ends, while the second link 71 is a cylindrical structure. This makes the second link 71 stronger in the torsional direction, so as to withstand the torque output by the motor and avoid deformation or breakage.

[0029] like Figure 2 As shown, the hinge 3 includes a fixed part 33 and a movable part 31, which are connected by a pin. The fixed part 33 is connected to the vehicle body, and the movable part 31 is connected to the vehicle door by a connecting bolt 2. The second connecting rod 42 is connected to the movable part 31 by a second ball head bolt 32. In this embodiment, the movable part 31 has a threaded hole and is threadedly connected to the second ball head bolt 32.

[0030] In this embodiment, there are dimensional tolerance requirements: the length direction tolerance of important functional dimensions is ±0.1mm, the diameter accuracy of the connecting rod is ±0.1mm, and the specific diameter size is selected according to the actual situation, with a connecting rod of 8mm or 10mm in diameter; the dimensional requirements of the ball head and ball socket 41 of the second ball head bolt 32 are as follows: in order to reduce abnormal noise caused by the matching gap during the opening and closing of the door, the spherical accuracy of the second ball head bolt 32 is -0.05~0mm, and the spherical accuracy of the ball socket 41 is +0.02~0.05mm.

[0031] Since some components operate in humid environments, high requirements are placed on the corrosion resistance of the connecting rod surface. In this embodiment, the second connecting rod assembly 4, the ball head bolt, and the first connecting rod assembly 7 all undergo zinc-nickel coating surface treatment with a coating thickness greater than 8 μm. After 480 hours of neutral salt spray testing, no surface defects such as rust, bubbles, or coating peeling are observed. The connection between the connecting rod and the ball socket 41 in this embodiment can withstand an axial pull-out force of 5000 N.

[0032] The working principle of this embodiment is as follows: The drive motor 6 rotates in both directions, causing the first link assembly 7 to swing. The second link assembly 4 pushes and pulls the hinge 3, causing the hinge 3 to move around the pin, thereby opening and closing the door.

[0033] In this embodiment, the drive motor 6 is embedded in the non-load-bearing cavity of the side A-pillar / B-pillar 5, and its axis is perpendicular to the linkage direction, saving the space occupied by the drive mechanism; and the linkage mechanism realizes the opening and closing of the car door by pushing and pulling, which can improve the transmission efficiency and realize the rapid control of the car door.

[0034] Example 2: This embodiment provides a car door equipped with the electric side door opening drive mechanism described in Embodiment 1. The hinge 3 connects the car door sheet metal 1 to the side A-pillar / B-pillar 5 via connecting bolts 2, enabling the car door to have basic manual opening and closing functions. The drive motor 6 is installed on the mounting bracket 8 inside the cavity of the side A-pillar / B-pillar 5 using a screw connection. The first connecting rod assembly 7 is connected to the drive motor 6 via a coupling. The second connecting rod assembly 4 passes through the through hole opened in the side A-pillar / B-pillar 5 and is connected to the hinge 3 and the first connecting rod assembly 7 via a ball joint and ball socket 41 connection, forming the drive part for electric opening of the car door.

[0035] The door is also equipped with a drive controller ECU, a self-closing door lock, and connecting wires. The ECU controls the drive motor 6 to rotate according to the CAN bus signal. The linkage mechanism converts the rotational motion into the planar motion of the linkage. The linkage stroke is linearly related to the door opening degree (maximum opening degree is 68°±2°).

[0036] Example 3: This embodiment provides a door control method, employing the door structure described in Embodiment 2, such as... Figure 3 As shown, the door opening and closing control is based on the ECU, and the specific control process is as follows: Door closing process: The ECU has multiple command receiving ports and can receive door closing commands from physical buttons, mobile APP, and Bluetooth key. After receiving the door closing command, the ECU will immediately start the authentication process, such as comparing it with the user identity information pre-stored in the vehicle system to verify whether the device sending the command is an authorized device. After successful authentication, the ECU sends the door closing command to the drive motor 6.

[0037] After receiving the signal from the ECU, the drive motor 6 starts to rotate, which drives the first linkage assembly 7 to rotate. Then, under the action of the second linkage assembly 4, it pulls the door to close. After locking one lock, it triggers the door lock to automatically engage and close the door.

[0038] Opening process: After the signal is triggered by the button / remote control / kick, the ECU sends an unlocking command to the self-closing door lock. The self-closing door lock releases the mechanical latch through the motor drive and sends a signal of successful unlocking back to the ECU. After the ECU confirms that the self-closing door lock is unlocked, it immediately sends a reverse command to the drive motor 6. The drive motor 6 drives the linkage mechanism to pull the door and open the door.

[0039] In this embodiment, when the ECU issues open and close commands and the drive motor 6 begins to move, PWM (Pulse Width Modulation) logic is used to reduce energy output and slow down the mechanism, eliminating instantaneous impact and reducing high-speed impact noise between parts. Upon receiving the open command, the ECU issues a close command to the drive motor 6 and simultaneously issues an unlock command to the latch, reducing the impact of the unlocking reaction force from the sealing system. At the end of the opening and closing phases, the closing speed is controlled to 0.25~0.3 m / s to reduce impact noise caused by the high-speed impact at the moment of closing.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric side door opening drive mechanism, characterized in that, include: A drive motor is installed inside the non-load-bearing cavity of the side A-pillar / B-pillar. The linkage mechanism includes a first linkage assembly and a second linkage assembly. One end of the first linkage assembly is connected to a drive motor, and the other end of the first linkage assembly is connected to one end of the second linkage assembly. The other end of the second linkage assembly is connected to a hinge, which is used to connect the door sheet metal. The drive motor can rotate in both directions to move the first linkage assembly, thereby causing the second linkage assembly to push or pull the door.

2. The electric side door opening drive mechanism according to claim 1, characterized in that, The first link assembly includes a first link, and the second link assembly includes a second link. The second link and the first link are connected by ball head bolts and ball socket structures, respectively.

3. The electric side door opening drive mechanism according to claim 2, characterized in that, The second connecting rod passes through the through hole opened in the side A-pillar / B-pillar, and a dust cover is installed on the side of the second connecting rod corresponding to the through hole.

4. The electric side door opening drive mechanism according to claim 3, characterized in that, The dust cover has a flared structure, and the narrow end of the dust cover is interference-fitted with the second connecting rod.

5. The electric side door opening drive mechanism according to claim 1, characterized in that, The hinge includes a fixed part and a movable part that are rotatably connected together. The fixed part is used to connect to the vehicle body, and the movable part is used to connect to the vehicle door. The second link assembly is connected to the moving part.

6. The electric side door opening drive mechanism according to claim 2, characterized in that, The axis of the drive motor is perpendicular to the first link and the second link.

7. A vehicle door, characterized in that, It is equipped with an electric side door opening drive mechanism as described in any one of claims 1-6.

8. A car door according to claim 7, characterized in that, It also includes an ECU, which controls the drive motor to rotate forward or backward according to the door closing or opening command.

9. A method for controlling a vehicle door as described in claim 8, characterized in that, include: Door closing process: The ECU receives the door closing command and controls the drive motor to rotate. The drive motor pulls the door to close through the first link assembly and the second link assembly. Door opening process: The ECU receives the door opening command, controls the drive motor to reverse, and the drive motor pushes the door open through the first link assembly and the second link assembly.

10. A method for controlling a vehicle door as described in claim 9, characterized in that, The door closing command includes at least one of physical buttons, mobile APP, and Bluetooth key; During the door opening process, the self-closing lock is controlled to open via button, remote control, or foot kick trigger signal, and the opening signal is transmitted to the ECU.

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