An axial drive actuator for a vehicle side or tailgate door

Abstract

The utility model discloses an axial drive actuator for car side door or back door belongs to the technical field of automobile parts, it includes: axial drive actuator body, axial drive actuator body includes: gear box, casing and drive motor, the output of drive motor is fixedly installed with input shaft, the top inside rotation of gear box is installed with output shaft, the inside rotation of casing is installed with transmission screw rod, the inside sliding of casing is installed with axial drive rod, the top fixed mounting of input shaft has primary sun gear, and its outside rotation installs primary planet carrier, the bottom fixed mounting of output shaft has secondary sun gear, and its outside rotation installs secondary planet carrier, according to planetary gear drive principle, torque and rotation speed are inversely proportional, and the torque is synchronous promotion while the rotation speed reduces, and secondary speed reduction increases the torsion still can optimize the smoothness of power output, avoid the door body to open or close when the door body suddenly accelerates to open or close when power mutation leads, improve user experience.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an axial drive actuator for automotive side doors or rear doors. Background Technology

[0002] With the continuous innovation of automotive component technology, the opening and closing drive system of automotive doors, as a key part related to user experience and vehicle functionality, has always been at the forefront of technological development. With the vigorous development of the automotive industry, consumers have put forward higher requirements for the intelligence, convenience and safety of automobiles, and the drive system of automotive doors is also constantly evolving.

[0003] Traditional electric drive solutions for automotive side doors or tailgates often employ relatively simple direct-drive motors with lead screws or flexible transmission methods such as chains and belts. While these solutions achieve a certain degree of automation in door opening and closing, they have significant drawbacks. With direct-drive motors with lead screws, the motor's output characteristics are difficult to precisely match the actual driving requirements of the door, often resulting in insufficient torque and causing the door to jam, especially in cold weather or when the door is under increased load. Flexible transmission methods such as chains and belts, while providing some buffering of power, are prone to slippage, leading to unstable power transmission and poor door opening and closing speed and position control accuracy. Therefore, we propose an axial drive actuator for automotive side doors or tailgates to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide an axial drive actuator for automobile side doors or rear doors to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An axial drive actuator for a car side door or rear door includes: an axial drive actuator body, the axial drive actuator body including: a gearbox, a housing, and a drive motor; an input shaft is fixedly mounted on the output end of the drive motor; an output shaft is rotatably mounted inside the top of the gearbox; a transmission screw is rotatably mounted inside the housing; an axial drive rod is slidably mounted inside the housing; a first-stage sun gear is fixedly mounted on the top of the input shaft, and a first-stage planetary carrier is rotatably mounted on its outer side; a second-stage sun gear is fixedly mounted on the bottom of the output shaft, and a second-stage planetary carrier is rotatably mounted on its outer side; three sets of connecting shafts are rotatably mounted inside both the first-stage and second-stage planetary carriers; a first-stage planetary gear is fixedly mounted on the bottom of the three lower sets of connecting shafts, and a second-stage planetary gear is fixedly mounted on the bottom of the three upper sets of connecting shafts; a transmission shaft is fixedly mounted between the first-stage and second-stage sun gears; and a first-stage gear ring and a second-stage gear ring are fixedly mounted inside the gearbox.

[0006] Preferably, the outer side of the axial drive rod is threaded with a connecting nut, the bottom of the drive motor is fixedly mounted with a mounting connection part, the input shaft is rotatably mounted at the bottom of the gearbox, the drive motor is fixedly mounted at the bottom of the housing, and the housing is fixedly mounted at the top of the gearbox.

[0007] Preferably, the first-stage sun gear meshes with three sets of first-stage planetary gears, and all three sets of first-stage planetary gears mesh with the first-stage ring gear.

[0008] Preferably, the secondary sun gear meshes with three sets of secondary planetary gears, and all three sets of secondary planetary gears mesh with the secondary ring gear.

[0009] Preferably, the housing has a guide groove inside, and the axial drive rod is slidably installed in the guide groove.

[0010] Preferably, the output shaft is fixedly connected to the transmission screw, and the axial drive rod is threaded to the outside of the transmission screw.

[0011] In this invention, an axial drive actuator for a car side door or rear door is described. The rotation of the output shaft directly drives the transmission screw to rotate synchronously. The transmission screw and the axial drive rod are threaded together, allowing the axial drive rod to move linearly along the guide groove. The extension or retraction of the axial drive rod can be achieved according to the forward or reverse direction of the drive motor. The connecting nut with its outer threaded connection serves as a connection medium with the car side door or rear door, transmitting the linear driving force of the axial drive rod to the door body. When the axial drive rod extends, it pushes the door body open; when the axial drive rod retracts, it pulls the door body closed, ultimately achieving automated opening and closing control of the car door. The mounting connection at the bottom of the drive motor ensures that the motor remains stable and fixed during operation, preventing vibration from affecting the power transmission accuracy. This ensures that the axial drive actuator can efficiently, accurately, and stably achieve automated opening and closing of the car door, meeting functional requirements while optimizing performance and adaptability, and is an important guarantee for the reliable operation of the actuator. This utility model has a reasonable structural design. The drive motor drives the input shaft and the first-stage sun gear to rotate. The fixed first-stage gear ring restricts the revolution trajectory of the first-stage planetary gear, so that the first-stage planetary gear rotates on its own axis while revolving around the first-stage sun gear. The rotation and revolution power of the first-stage planetary gear is transmitted to the first-stage planetary carrier through its mounting connecting shaft, causing the first-stage planetary carrier to rotate. During this process, the planetary gear set achieves initial deceleration and torque increase, converting the high-speed, low-torque power of the drive motor into low-speed, high-torque power more suitable for door driving. The rotational power of the first-stage planetary carrier is transmitted to the upper second-stage sun gear through the transmission shaft, causing the second-stage sun gear to rotate synchronously. The fixed second-stage... The primary ring gear restricts the movement trajectory of the secondary planetary gear, causing it to rotate on its own axis during its revolution. This rotation, via the connecting shaft, drives the secondary planetary carrier to rotate. This step achieves secondary speed reduction and torque amplification, further optimizing power parameters and ensuring that the output torque is sufficient to drive the heavy doors of the car's side doors or rear doors. The rotation of the secondary planetary carrier drives the output shaft, which is fixedly mounted inside, to rotate. Power is transmitted from the gearbox to the transmission screw rotating inside the housing above. According to the principle of planetary gear transmission, torque is inversely proportional to speed. As the speed decreases, the torque increases simultaneously. This secondary speed reduction and torque amplification also optimizes the smoothness of power output, preventing sudden power changes that could cause the door to accelerate suddenly when opening or closing, thus improving the user experience. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of an axial drive actuator for a car side door or rear door proposed in this utility model. Figure 2 This is a cross-sectional view of an axial drive actuator for a car side door or rear door proposed in this utility model. Figure 3 for Figure 2A magnified view of part A in the middle; Figure 4 This is a partial three-dimensional structural diagram of an axial drive actuator for a car side door or rear door proposed in this utility model.

[0013] In the diagram: 1. Axial drive actuator body; 2. Housing; 3. Axial drive rod; 4. Connecting nut; 5. Gearbox; 6. Drive motor; 7. Mounting connection; 8. Transmission screw; 9. Guide groove; 10. Input shaft; 11. First-stage planetary carrier; 12. Connecting shaft; 13. First-stage sun gear; 14. First-stage planetary gear; 15. First-stage ring gear; 16. Second-stage ring gear; 17. Output shaft; 18. Second-stage planetary carrier; 19. Second-stage sun gear; 20. Second-stage planetary gear; 21. Transmission shaft. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-4 An axial drive actuator for a car side door or rear door includes: an axial drive actuator body 1, the axial drive actuator body 1 including: a gearbox 5, a housing 2, and a drive motor 6; an input shaft 10 fixedly mounted on the output end of the drive motor 6; an output shaft 17 rotatably mounted inside the top of the gearbox 5; a transmission screw 8 rotatably mounted inside the housing 2; an axial drive rod 3 slidably mounted inside the housing 2; a first-stage sun gear 13 fixedly mounted on the top of the input shaft 10, and a first-stage planetary carrier 11 rotatably mounted on its outer side; the output shaft 1... A secondary sun gear 19 is fixedly installed at the bottom of gear 7, and a secondary planetary carrier 18 is rotatably installed on its outer side. Three sets of connecting shafts 12 are rotatably installed inside the primary planetary carrier 11 and the secondary planetary carrier 18. A primary planetary gear 14 is fixedly installed at the bottom of the three sets of connecting shafts 12 located below, and a secondary planetary gear 20 is fixedly installed at the bottom of the three sets of connecting shafts 12 located above. A drive shaft 21 is fixedly installed between the primary sun gear 13 and the secondary sun gear 19. A primary gear ring 15 and a secondary gear ring 16 are fixedly installed inside the gearbox 5.

[0016] In this embodiment, the outer side of the axial drive rod 3 is threaded with a connecting nut 4, the bottom of the drive motor 6 is fixedly installed with a mounting connection part 7, the input shaft 10 is rotatably installed at the bottom of the gearbox 5, the drive motor 6 is fixedly installed at the bottom of the housing 2, and the housing 2 is fixedly installed at the top of the gearbox 5, so as to ensure that the power of the axial drive rod 3 is stably transmitted to the door body and avoid drive failure caused by loose connection during the opening and closing of the door body.

[0017] In this embodiment, the first-stage sun gear 13 meshes with three sets of first-stage planetary gears 14, and all three sets of first-stage planetary gears 14 mesh with the first-stage ring gear 15, converting the motor power into power parameters more suitable for door driving, laying the foundation for further power optimization in the subsequent second-stage transmission.

[0018] In this embodiment, the secondary sun gear 19 meshes with three sets of secondary planetary gears 20, and all three sets of secondary planetary gears 20 mesh with the secondary ring gear 16, further reducing the rotational speed and increasing the torque, ensuring that the torque finally transmitted to the transmission screw 8 is sufficient to overcome the weight of the door and the hinge resistance, so as to achieve smooth opening and closing of the door.

[0019] In this embodiment, a guide groove 9 is provided inside the housing 2, and the axial drive rod 3 is slidably installed in the guide groove 9 to ensure the accurate movement trajectory of the axial drive rod 3 and avoid misalignment or jamming of the door due to the offset of the drive rod.

[0020] In this embodiment, the output shaft 17 is fixedly connected to the transmission screw 8, and the axial drive rod 3 is threaded to the outside of the transmission screw 8 to avoid the door being driven weakly due to low transmission efficiency.

[0021] In this embodiment, during use, when the vehicle control system issues a door opening / closing command, the drive motor 6 is activated to rotate the input shaft 10, which in turn drives the top primary sun gear 13 to rotate synchronously. Since the primary sun gear 13 meshes with the three sets of primary planetary gears 14 rotatably mounted inside the primary planetary carrier 11 via the connecting shaft 12, and these three sets of primary planetary gears 14 mesh with the primary gear ring 15 fixed inside the gearbox 5, a complete planetary gear transmission structure is formed. The fixed primary gear ring 15 restricts the revolution trajectory of the primary planetary gears 14, causing the primary planetary gears 14 to rotate on their own axis while revolving around the primary sun gear 13. The rotational and revolutionary power of the primary planetary gears 14 is transmitted to the primary planetary carrier 11 via the connecting shaft 12, causing the primary planetary carrier 11 to rotate. During this process, the planetary gear set achieves initial deceleration and torque increase, converting the high-speed, low-torque power of the drive motor 6 into a more efficient and efficient transmission. Suitable for low-speed, high-torque power for door drive; the rotational power of the primary planetary carrier 11 is transmitted to the upper secondary sun gear 19 through the drive shaft 21, and drives the secondary sun gear 19 to rotate synchronously. The secondary sun gear 19 meshes with the three sets of secondary planetary gears 20 rotatably mounted inside the secondary planetary carrier 18 through the connecting shaft 12. The secondary planetary gears 20 mesh with the secondary gear ring 16 fixed inside the gearbox 5, forming a second planetary gear transmission. The fixed secondary gear ring 16 restricts the movement trajectory of the secondary planetary gears 20, causing them to rotate on their own axis during revolution, and drive the secondary planetary carrier 18 to rotate through the connecting shaft 12. This step achieves secondary deceleration and torque increase, further optimizing the power parameters and ensuring that the output torque is sufficient to drive the heavy door body of the car side door or rear door. The rotation of the secondary planetary carrier 18 drives the output shaft 17 fixedly mounted inside to rotate, and the power is transmitted from the gearbox 5 to the transmission screw 8 rotating inside the housing 2 above. The rotation of the output shaft 17 directly drives the transmission screw 8 to rotate synchronously. Through the threaded connection between the transmission screw 8 and the axial drive rod 3, the axial drive rod 3 moves linearly along the direction of the guide groove 9. The extension or retraction of the axial drive rod 3 can be realized according to the forward and reverse directions of the drive motor 6. The connecting nut 4 with its outer thread can serve as a connection medium with the side door or rear door of the car, transmitting the linear driving force of the axial drive rod 3 to the door body. When the axial drive rod 3 extends, it pushes the door body to open; when the axial drive rod 3 retracts, it pulls the door body to close, ultimately realizing the automatic opening and closing control of the car door body. The mounting connection part 7 at the bottom of the drive motor 6 ensures that the motor remains stable and fixed during operation, avoiding the impact of vibration on the power transmission accuracy.

[0022] The foregoing has provided a detailed description of an axial drive actuator for a car side door or rear door provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only intended to help understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An axial drive actuator for a car side door or rear door, characterized in that, include: An axial drive actuator body (1) includes a gearbox (5), a housing (2), and a drive motor (6). An input shaft (10) is fixedly mounted on the output end of the drive motor (6). An output shaft (17) is rotatably mounted inside the top of the gearbox (5). A transmission screw (8) is rotatably mounted inside the housing (2). An axial drive rod (3) is slidably mounted inside the housing (2). A first-stage sun gear (13) is fixedly mounted on the top of the input shaft (10), and a first-stage planetary carrier (11) is rotatably mounted on its outer side. The bottom of the output shaft (17) is fixedly mounted on the input shaft (10). A secondary sun gear (19) is installed, and a secondary planetary carrier (18) is rotatably installed on its outer side. Three sets of connecting shafts (12) are rotatably installed inside the primary planetary carrier (11) and the secondary planetary carrier (18). A primary planetary gear (14) is fixedly installed at the bottom of the three sets of connecting shafts (12) located below, and a secondary planetary gear (20) is fixedly installed at the bottom of the three sets of connecting shafts (12) located above. A transmission shaft (21) is fixedly installed between the primary sun gear (13) and the secondary sun gear (19). A primary gear ring (15) and a secondary gear ring (16) are fixedly installed inside the gearbox (5).

2. An axial drive actuator for a car side door or rear door according to claim 1, characterized in that, The outer side of the axial drive rod (3) is threaded with a connecting nut (4), the bottom of the drive motor (6) is fixedly installed with a mounting connection part (7), the input shaft (10) is rotatably installed at the bottom of the gearbox (5), the drive motor (6) is fixedly installed at the bottom of the housing (2), and the housing (2) is fixedly installed at the top of the gearbox (5).

3. An axial drive actuator for a car side door or rear door according to claim 1, characterized in that, The first-stage sun gear (13) meshes with three sets of first-stage planetary gears (14), and all three sets of first-stage planetary gears (14) mesh with the first-stage ring gear (15).

4. An axial drive actuator for a car side door or rear door according to claim 1, characterized in that, The secondary sun gear (19) meshes with the three sets of secondary planetary gears (20), and all three sets of secondary planetary gears (20) mesh with the secondary ring gear (16).

5. An axial drive actuator for a car side door or rear door according to claim 1, characterized in that, The housing (2) has a guide groove (9) inside, and the axial drive rod (3) is slidably installed in the guide groove (9).

6. An axial drive actuator for a car side door or rear door according to claim 1, characterized in that, The output shaft (17) is fixedly connected to the transmission screw (8), and the axial drive rod (3) is threaded to the outside of the transmission screw (8).

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