Automobile door driving mechanism

Abstract

The present invention relates to the technical field of automobile door drive mechanisms, and specifically to an automobile door drive mechanism, comprising a drive unit and an execution unit, wherein the drive unit is built into the automobile door and provides power, the execution unit is built into the automobile door and connected to the automobile body, the execution unit comprises a screw rod and a screw rod nut threadedly sleeved on the screw rod, the outer end of the screw rod is rotatably connected to the automobile body; one end of the execution unit is rotatably connected to the automobile door, the drive unit comprises a motor reducer, and a motor gear coaxially arranged on the output shaft of the motor reducer, the motor gear is meshed with the screw rod nut, and the present application can realize automatic opening and closing of automobile doors through the automobile door drive mechanism composed of the drive unit and the execution unit, and has a simple structure, reliable functions, small size, convenient installation, and low operating noise.

Description

Technical Field

[0001] The invention relates to the technical field of automobile door driving mechanisms, and in particular to an automobile door driving mechanism. Background Art

[0002] With the development of automobile automation and intelligence, the automatic opening and closing of automobile doors has greatly improved the user experience and enhanced the convenience of user use. The automobile door drive mechanism is highly practical and realizes the automatic opening and closing of automobile doors, which is convenient for people to travel. At the same time, it also avoids collision with other obstacles during the process of opening and closing the door, damage to the door, or clamping of people's hands / feet to cause personal injury; abnormal situations such as the door not being fully closed.

[0003] Currently, most of the existing electric door mechanisms adopt zipper / rack / hinge shaft type, which generally have many parts and complex structure, occupy a large space, and cannot effectively adapt to the space of the front and rear doors of the car. In addition, there are shortcomings such as the manual force for opening and closing the door does not meet the requirements (too large / too small), or it cannot achieve up / down / side slope hovering.

[0004] Due to the limitations of the car door's appearance, the internal space of the door is small, and many accessories need to be assembled inside the door. Therefore, the door installation space is limited, and the size of the door drive mechanism should not be too large, otherwise it will limit the door's shape and increase the difficulty of matching the mechanism.

[0005] The present invention provides a door driving mechanism with a compact structure and a small size, which can be adapted to the installation of front and rear doors of most vehicles while ensuring normal automatic opening and closing of the door. Summary of the invention

[0006] In order to solve the above technical problems, a vehicle door driving mechanism is provided.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0008] A car door drive mechanism includes a drive unit built into the car door and providing power, and an execution unit built into the car door and connected to the car body, the execution unit includes a lead screw and a lead screw nut threadedly sleeved on the lead screw, the outer end of the lead screw is rotationally connected to the car body; one end of the execution unit is rotationally connected to the car door, the drive unit includes a motor reducer, and a motor gear coaxially arranged on the output shaft of the motor reducer, the motor gear is meshed with the lead screw nut.

[0009] Preferably, a brake unit is also included, the brake unit includes a brake device and a brake gear, the brake device is built into the car door; the brake gear is coaxially fixedly connected to the output shaft of the brake device, and the brake gear is meshed with the screw nut.

[0010] Preferably, the brake device is an electromagnetic damper, which includes an electromagnet, a coil, a transmission gear ring, an electromagnetic armature, a damper pressure plate and a brake shaft. The electromagnet is fixedly arranged on the outer side of the actuator along the radial direction of the screw rod, and the damper pressure plate is coaxially and evenly fixedly arranged at one end of the electromagnet facing the screw rod; the transmission gear ring is coaxially and evenly fixedly arranged at one end of the electromagnetic armature, and the transmission gear ring is coaxially and spacedly connected to the damper pressure plate and rotates together. Friction plates are also coaxially arranged on both sides of the transmission gear ring, and the friction plates are in contact with the damping pressure plate. The coil is coaxially arranged on the electromagnet, and one end of the coil faces downward toward the electromagnetic armature; the brake shaft is coaxially fixedly arranged in the electromagnetic armature, and the brake gear is coaxially arranged at one end of the brake shaft facing the screw rod.

[0011] Preferably, it also includes a body bracket and a hinge assembly, the body bracket is arranged on the automobile body, and the outer end of the screw rod is rotatably connected to the body bracket; the hinge assembly is arranged at one end of the execution unit, and the hinge assembly is rotatably connected to the automobile door.

[0012] Preferably, a joint bearing is also included, and the outer end of the screw rod is movably connected to the vehicle body bracket through the joint bearing.

[0013] Preferably, it further comprises a left shell and a right shell, wherein the left shell and the right shell are connected to form a sealed shell, and the sealed shell is used to house a placement cavity of the execution unit and the drive unit.

[0014] Preferably, a sealing device is also included, which includes a bellows and a guide tube. The bellows is sleeved on the outside of the screw, and the two ends of the bellows are respectively fixedly connected to the sealing shell and the connecting end of the screw. The guide tube is coaxially arranged on the outside of the sealing shell with the screw. One end of the guide tube is closed, and the other end of the screw moves coaxially in the guide sleeve.

[0015] Preferably, the sealing device further comprises a sealing gasket, which is arranged between the left connection surface of the housing and the right connection surface of the housing.

[0016] Preferably, the harness plug is arranged at one end of the left side of the housing and the right side of the housing, and the harness plug is located at the connection end between the drive unit and the outside world.

[0017] Preferably, the screw nut comprises an internal threaded barrel and a gear ring, the threaded barrel is coaxially threadedly screwed with the screw; the gear ring is meshed with the motor gear or the brake gear.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This application can realize automatic opening and closing of automobile doors through automobile door driving mechanism;

[0020] 2. The drive unit and the execution unit of the present application have simple structure and reliable function; small size and convenient installation; low operating noise;

[0021] 3. The body bracket of the present application is provided at the connection with the body, and the body bracket and the screw rod are provided with a joint bearing, which ensures that the rotation axis of the drive mechanism bracket is always parallel to the hinge axis during the door opening and closing process, and also reduces the installation accuracy of the door drive mechanism of the car;

[0022] 4. This application provides a hinge bracket to ensure that the screw axis is in the best position during the door opening and closing process;

[0023] 5. This application provides an electromagnetic damper to ensure that the door has a hovering effect at any position. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 3 This is a cross-sectional view along the axial direction of the screw rod of the present invention;

[0027] Figure 4 It is an axial cross-sectional view of the electromagnetic damper of the present invention.

[0028] The numbers in the figure are:

[0029] 1-housing left, 2-housing right, 3-body bracket, 4-screw, 5-hinge assembly, 6-guide tube, 7-electromagnetic damper, 8-brake gear, 9-screw nut, 10-motor gear, 11-motor reducer, 12-bellows, 13-spherical bearing, 14-wiring plug, 15-sealing gasket, 101-electromagnet, 102-coil, 103-drive gear ring, 104-electromagnetic armature, 105-damper pressure plate, 106-friction plate. DETAILED DESCRIPTION

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0031] In order to solve the technical problem that the existing door drive mechanism is large and inconvenient to install, such as Figure 2 As shown, the following preferred technical solutions are provided:

[0032] A vehicle door driving mechanism, comprising a driving unit built into the vehicle door and providing power, and an execution unit built into the vehicle door and connected to the vehicle body, the execution unit comprising a screw rod 4 and a screw rod nut 9 threadedly sleeved on the screw rod 4, the outer end of the screw rod 4 being rotatably connected to the vehicle body;

[0033] One end of the execution unit is rotationally connected to the car door. The driving unit includes a motor reducer 11 and a motor gear 10 coaxially arranged on the output shaft of the motor reducer 11 . The motor gear 10 is meshed with the lead screw nut 9 .

[0034] Specifically, the drive unit and the execution unit are both built into the car door. When the car door needs to be opened automatically, the motor reducer 11 is started, and its output shaft drives the motor gear 10 to rotate coaxially. Since the motor gear 10 is meshed with the lead screw nut 9, the lead screw nut 9 is rotated relative to the drive unit, and one end of the lead screw 4 is rotationally connected to the car body, so that the lead screw 4 cannot rotate relative to the drive unit. Moreover, since the lead screw 4 is threadedly screwed with the lead screw nut 9, the thread of the lead screw 4 can drive the lead screw 4 to move in a straight line, thereby generating thrust, thereby pushing the car door to open and close automatically.

[0035] When the driving unit stops working, the output shaft of the motor reducer 11 will continue to rotate a certain angle due to inertia, that is, the motor gear 10 will drive the screw nut 9 to rotate a certain angle, that is, the door cannot be suspended at any position. In order to solve this technical problem, Figure 2 As shown, the following preferred technical solutions are provided:

[0036] The brake unit also includes a brake device and a brake gear 8.

[0037] The brake device is built into the car door;

[0038] The brake gear 8 is coaxially fixedly connected to the output shaft of the brake device, and the brake gear 8 is meshed with the screw nut 9.

[0039] Specifically, the brake unit is arranged in the car door. When the screw rod 4 pushes the car door to open and close normally, the brake device is in a closed state, so that the output shaft of the brake device can rotate freely, and the screw nut 9 meshing with the brake gear 8 can rotate normally. When the car door needs to be suspended at any position, the brake device is started, so that its output shaft cannot rotate, and the screw nut 9 meshing with the brake gear 8 cannot rotate normally, so that the screw nut 9 stops rotating in time to prevent the screw rod 4 from continuing to push the door.

[0040] In order to solve the technical problem of how to selectively brake the output of the brake device, such as Figure 2 and Figure 4 As shown, the following preferred technical solutions are provided:

[0041] The brake device is an electromagnetic damper 7, which includes an electromagnet 101, a coil 102, a transmission gear ring 103, an electromagnetic armature 104, a damper pressure plate 105 and a brake shaft.

[0042] The electromagnet 101 is fixedly arranged on the outside of the actuator along the radial direction of the screw rod 4, and the damper pressure plate 105 is coaxially and equidistantly fixedly arranged on one end of the electromagnet 101 facing the screw rod 4;

[0043] The transmission gear ring 103 is coaxially and evenly spaced and fixedly arranged at one end of the electromagnetic armature 104. The transmission gear ring 103 is coaxially and spacedly connected with the damper pressure plate 105 and rotates in cooperation. Friction plates 106 are coaxially arranged on both sides of the transmission gear ring 103. The friction plates 106 are in contact with the damper pressure plate.

[0044] The coil 102 is coaxially arranged on the electromagnet 101, and one end of the coil 102 faces downwardly toward the electromagnet armature 104;

[0045] The brake shaft is coaxially fixedly arranged in the electromagnetic armature 104 , and the brake gear 8 is coaxially arranged at one end of the brake shaft facing the screw rod 4 .

[0046] Specifically, during the process of the lead screw nut 9 rotating to drive the lead screw 4 to make a linear motion, the electromagnetic damper 7 is in a power-off state, that is, the coil 102 is in a power-off state. When it is necessary to stop the lead screw nut 9 from rotating in time, the line segment is energized, so that the electromagnet 101 generates magnetic force and adsorbs the electromagnetic armature 104, so that the transmission gear ring 103 is tightly abutted against the side of the damping pressure plate through the friction plate 106. Due to the friction force, the electromagnetic armature 104 cannot rotate relative to the electromagnet 101, so that the brake gear 8 cannot drive the brake shaft to rotate in the electromagnet 101, thereby locking the lead screw nut 9, and the adsorption pressure of the electromagnetic armature 104 can be adjusted by adjusting the current, thereby adjusting the internal resistance of the brake unit, so as to achieve the purpose of the car door being able to hover at any displacement.

[0047] In order to solve the technical problem of stable installation of automobile door drive mechanism, such as Figure 1 and Figure 2 As shown, the following preferred technical solutions are provided:

[0048] It also includes a vehicle body bracket 3 and a hinge assembly 5.

[0049] The body bracket 3 is arranged on the automobile body, and the outer end of the screw rod 4 is rotatably connected to the body bracket 3;

[0050] The hinge assembly 5 is arranged at one end of the execution unit, and the hinge assembly 5 is rotationally connected to the vehicle door.

[0051] Specifically, by setting the body bracket 3 on the car body, the outer end of the screw rod 4 can be rotatably connected to the body bracket 3, and one end of the execution unit is connected to the car door through the hinge assembly 5, so that the screw rod 4 can push the door to open and close automatically when it is extended and retracted.

[0052] In order to solve the technical problem of reducing the installation accuracy of the automobile door drive mechanism, such as Figure 2 As shown, the following preferred technical solutions are provided:

[0053] It also includes a joint bearing 13 , and the outer end of the screw rod 4 is movably connected to the vehicle body bracket 3 through the joint bearing 13 .

[0054] Specifically, the outer end of the screw rod 4 is movably connected to the body bracket 3 through the spherical bearing 13, ensuring that the rotation axis of the drive unit is always parallel to the hinge axis during the door opening and closing process, while also reducing the installation accuracy of the door drive mechanism.

[0055] In order to solve the technical problem of how to stably install the execution unit and the drive unit in the door, such as Figure 1 As shown, the following preferred technical solutions are provided:

[0056] The device further comprises a left shell 1 and a right shell 2, which are connected to form a sealed shell, and the sealed shell is used for accommodating an accommodating cavity of an execution unit and a driving unit.

[0057] Specifically, by connecting the left shell 1 and the right shell 2 and arranging the execution unit and the driving unit in the placement cavity, the execution unit and the driving unit can be made into a whole, so as to facilitate installation and transportation.

[0058] When the screw rod 4 passes through the sealing shell, a gap is likely to be generated, and external pollution is likely to enter the sealing ring through the gap. In order to solve this technical problem, Figure 2 As shown, the following preferred technical solutions are provided:

[0059] It also includes a sealing device, which includes a bellows 12 and a guide tube 6.

[0060] The bellows 12 is sleeved on the outside of the screw rod 4, and the two ends of the bellows 12 are fixedly connected to the sealing shell and the connecting end of the screw rod 4 respectively.

[0061] The guide tube 6 is coaxially arranged on the outside of the sealing shell with the screw rod 4 , one end of the guide tube 6 is closed, and the other end of the screw rod 4 moves coaxially in the guide sleeve.

[0062] Specifically, by sleeved the bellows 12 on the screw rod 4, and allowing one end of the screw rod 4 to pass through the sealing shell and extend relative to the sealing shell, the bellows 12 can be deformed in the axial direction, thereby preventing external pollution from entering the interior of the sealing shell through the through gap. The screw rod 4 is overall longer, and by coaxially arranging a guide tube 6 sealed at one end with the screw rod 4 on the outside of the sealing shell, the other end of the screw rod 4 can move in the guide tube 6, thereby reducing the volume of the sealing shell, facilitating installation, and ensuring sealing.

[0063] In order to solve the technical problem of sealing the connection surface between the left shell 1 and the right shell 2, as Figure 2 As shown, the following preferred technical solutions are provided:

[0064] The sealing device further comprises a sealing gasket 15 , which is arranged between the connecting surfaces of the left housing 1 and the right housing 2 .

[0065] Specifically, by arranging the sealing gasket 15 between the connecting surfaces of the left housing 1 and the right housing 2, the waterproof sealing effect of the sealing shell can be improved.

[0066] As some optional embodiments of the present application, the connection surfaces of the left shell 1 and the right shell 2 are further provided with a sealing gasket installation groove, and the sealing gasket is arranged in the sealing gasket installation groove.

[0067] In order to solve the technical problem that the connection end of the drive unit is prone to gaps with the sealing shell, such as Figure 2 As shown, the following preferred technical solutions are provided:

[0068] The harness plug 14 is disposed at one end of the left housing 1 and the right housing 2, and the harness plug 14 is located at the connection end between the drive unit and the outside.

[0069] Specifically, by providing a harness plug 14 at one end of the left shell 1 and the right shell 2 , the connecting wires of the drive unit can be connected to the outside through the harness plug 14 , thereby improving the waterproof sealing inside the left shell 1 and the right shell 2 .

[0070] As some optional embodiments of the present application, a harness plug installation groove connected to the outside is provided inside the left shell 1 and the right shell 2. The harness installation groove is located at the connection end between the drive unit and the outside world, and the harness plug 14 is arranged in the harness plug installation groove.

[0071] In order to solve the technical problem of how the screw nut 9 can mesh with the motor gear 10 or the brake gear 8 while being coaxially screwed with the screw 4, as shown in FIG. Figure 3 As shown, the following preferred technical solutions are provided:

[0072] The screw nut 9 includes an internal threaded barrel and a gear ring. The threaded barrel is coaxially threadedly screwed with the screw 4 ; the gear ring is meshed with the motor gear 10 or the brake gear 8 .

[0073] Specifically, the screw nut 9 is composed of an internal threaded barrel and a gear ring, so that the threaded barrel can be coaxially screwed with the screw 4, and the gear ring is meshed with the motor gear 10 or the brake gear 8, thereby facilitating stable transmission and braking.

[0074] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A vehicle door driving mechanism, comprising a driving unit built into the vehicle door and providing power, and an actuating unit built into the vehicle door and connected to the vehicle body, the actuating unit comprising a screw rod (4) and a screw rod nut (9) threadedly sleeved on the screw rod (4), the outer end of the screw rod (4) being rotatably connected to the vehicle body; It is characterized in that One end of the execution unit is rotationally connected to the vehicle door, and the driving unit comprises a motor reducer (11) and a motor gear (10) coaxially arranged on the output shaft of the motor reducer (11), and the motor gear (10) is meshed with a screw nut (9); Also includes a brake unit, the brake unit includes a brake device and a brake gear (8), The brake device is built into the car door; The brake gear (8) is coaxially fixedly connected to the output shaft of the brake device, and the brake gear (8) is meshed with the screw nut (9); The brake device is an electromagnetic damper (7), which comprises an electromagnet (101), a coil (102), a transmission gear ring (103), an electromagnetic armature (104), a damper pressure plate (105) and a brake shaft. The electromagnet (101) is fixedly arranged on the outer side of the actuator along the radial direction of the screw rod (4), and the damper pressure plate (105) is coaxially and equidistantly fixedly arranged on one end of the electromagnet (101) facing the screw rod (4); The transmission gear ring (103) is coaxially and evenly spaced and fixedly arranged at one end of the electromagnetic armature (104). The transmission gear ring (103) and the damper pressure plate (105) are coaxially connected and rotated together. Friction plates (106) are coaxially arranged on both sides of the transmission gear ring (103). The friction plates (106) are in contact with the damper pressure plate. The coil (102) is coaxially arranged on the electromagnet (101), and one end of the coil (102) faces downwardly toward the electromagnet armature (104); The brake shaft is coaxially fixedly arranged in the electromagnetic armature (104), and the brake gear (8) is coaxially arranged at one end of the brake shaft facing the screw rod (4); The device also includes a left shell (1) and a right shell (2), wherein the left shell (1) and the right shell (2) are connected to form a sealed shell, and the sealed shell is used to place a placement cavity of the execution unit and the drive unit, and also includes a sealing device, which includes a bellows (12) and a guide tube (6). The bellows (12) is sleeved on the outside of the screw rod (4), and the two ends of the bellows (12) are respectively fixedly connected to the sealing shell and the connecting end of the screw rod (4). The guide tube (6) and the screw rod (4) are coaxially arranged outside the sealing shell, one end of the guide tube (6) is closed, and the other end of the screw rod (4) moves coaxially in the guide sleeve.

2. The automobile door driving mechanism according to claim 1, characterized in that: It also includes a vehicle body bracket (3) and a hinge assembly (5), The body bracket (3) is arranged on the automobile body, and the outer end of the screw rod (4) is rotatably connected to the body bracket (3); The hinge assembly (5) is arranged at one end of the execution unit, and the hinge assembly (5) is rotationally connected to the vehicle door.

3. The automobile door driving mechanism according to claim 2, characterized in that: It also includes a joint bearing (13), and the outer end of the screw rod (4) is movably connected to the vehicle body bracket (3) through the joint bearing (13).

4. The automobile door driving mechanism according to claim 3, characterized in that: The sealing device also includes a sealing gasket (15), which is arranged between the connecting surfaces of the left shell (1) and the right shell (2).

5. The automobile door driving mechanism according to claim 3, characterized in that: The harness plug (14) is arranged at one end of the left housing (1) and the right housing (2), and the harness plug (14) is located at the connection end between the drive unit and the outside world.

6. The automobile door driving mechanism according to claim 1, characterized in that: The screw nut (9) comprises an internal threaded barrel and a gear ring, the threaded barrel is coaxially threadedly screwed with the screw (4); the gear ring is meshed with the motor gear (10) or the brake gear (8).

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