A door driving device with an encoder and an intelligent door opening system

Abstract

The utility model discloses a kind of vehicle door driving device and intelligent door opening system with encoder, belong to vehicle door driving technical field, including push rod assembly, nut assembly, screw rod, shell, gear box and driver, the power transmission of the driver is passed to the screw rod on the gear box, the nut assembly is threadedly connected with the screw rod, one end of the push rod assembly is connected with the nut assembly, the shell surrounds the push rod assembly and the nut assembly, further include control box, the control box is connected with the one end of driving outward, circuit board and magnetic encoding sensor are equipped in the control box, the driver includes output shaft, the end of the output shaft is inserted into the control box, magnet is equipped on the end of the output shaft, the magnetic encoding sensor is set on the circuit board, and the magnetic encoding sensor is opposite with the magnet, the rotating position of the output shaft can be detected and feedback, reach the effect of improving the accuracy of sliding door.

Description

Technical Field

[0001] This utility model relates to the field of vehicle door drive technology, specifically to a vehicle door drive device with encoder and an intelligent door opening system. Background Technology

[0002] With the popularization of intelligent driving technology, electric door systems are gradually upgrading from basic functions to intelligent doors that enhance user experience. Intelligent doors support diverse interactive scenarios, such as automatic obstacle avoidance opening, welcome mode, and remote control opening. This places higher demands on the compactness, reliability, and environmental adaptability of the drive unit. However, existing side door rotation drive units still have significant drawbacks: they use a combination of brushed motors and electromagnetic brakes or a separate brushless motor for drive, resulting in an excessively large overall size that is difficult to fit into the compact door cavity space, especially in models with hidden door handles; their transmission mechanisms mostly rely on rigid connections, and when the door is subjected to external impact, the detection of the door opening degree is inaccurate. For example, if the user accidentally pushes or pulls the door manually, or if the door deforms due to long-term use, there is a lack of stress compensation, which can easily lead to mechanism jamming, thread wear, or even motor overload and burnout. Therefore, there is a need for a highly integrated door opening and closing drive unit with deformation adaptive capabilities and multimodal interaction to meet the requirements of accurately positioning the door opening and closing position and compensating for slight mechanism deformation. Utility Model Content

[0003] One of the objectives of this invention is to provide a door drive device with an encoder, which solves the problems of inaccurate control and large installation size of existing door drive devices due to the lack of feedback on the movement position.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0005] A door drive device with an encoder includes a push rod assembly, a nut assembly, a lead screw, a housing, a gearbox, and a driver. The gearbox transmits power from the driver to the lead screw. The nut assembly is threadedly connected to the lead screw. One end of the push rod assembly is connected to the nut assembly. The housing surrounds the push rod assembly and the nut assembly. The device also includes a control box connected to the outward-facing end of the driver. The control box contains a circuit board and a magnetic encoder sensor. The driver includes an output shaft, the end of which extends into the control box. A magnet is located at the end of the output shaft. The magnetic encoder sensor is mounted on the circuit board and faces the magnet, enabling detection and feedback of the rotational position of the output shaft, thereby improving the accuracy of the sliding door.

[0006] Furthermore, it also includes a support member, which is sleeved on the end of the output shaft, and the magnet is mounted on the support member. The magnet is securely fixed and facilitates the addition of the control box to the existing drive device.

[0007] Furthermore, the control box includes a housing and an end cap. One end of the housing is open, and the end cap is disposed on the opening. The other end of the housing is connected to the driver. The driver has an end cap at the end facing the control box. The end cap is integrally formed with the housing. The outer wall of the driver has a slot, and the outer wall of the end cap has a protrusion. The protrusion falls into the slot to form a riveting connection, and the control box is firmly and reliably connected to the driver.

[0008] Furthermore, the circuit board includes a first layer board, a second layer board, and multiple pins. The first layer board is disposed on the inner wall of the housing, and the second layer board is disposed parallel to the top of the first layer board. The magnetic coding sensor is disposed on the first layer board, and the two ends of the multiple pins are respectively connected to the first layer board and the second layer board, making full use of the internal space and reducing the volume of the control box.

[0009] Preferably, a potting groove is provided between the end cap and the inner wall of the housing, and the potting groove is filled with sealant to seal the control box.

[0010] Preferably, a sealing groove is provided on the outer wall of the end cap, and a sealing ring is provided in the sealing groove. The sealing ring seals the connection gap between the end cap and the driver, thereby sealing the driver.

[0011] Furthermore, the control box also includes a plug-in interface, which is located on the outer side wall of the housing near the driver. The plug-in direction of the plug-in interface is parallel to the length direction of the push rod assembly and the length direction of the driver. There are no gaps between the various components, which improves space utilization and makes the overall structure compact.

[0012] Furthermore, the nut assembly includes a threaded sleeve and a ball head pin. The threaded sleeve is threaded onto the lead screw, and the ball head pin is disposed on the threaded sleeve. The push rod assembly includes a push-pull rod, a ball cup, a bushing, and a spring element. The ball cup is disposed on one end of the push-pull rod, and the ball head pin falls into the ball cup to form a ball-pin connection. The other end of the push-pull rod is connected to the car door. The bushing is disposed on the inner wall of the ball cup. One end of the spring element abuts against the bottom wall of the ball cup, and the other end abuts against the surface of the bushing, which is used to absorb the shaking of movement and the deformation of the component, and to prevent the push-pull rod from wearing and jamming after long-term use.

[0013] Furthermore, both the lead screw and the push rod assembly are housed within the housing, the gearbox is located at one end of the housing, the driver is arranged side by side with the lead screw, the push rod assembly is located between the lead screw and the driver, and the other end of the push rod assembly extends out of the housing, reducing space occupation and allowing it to be installed inside narrow car doors.

[0014] The second objective of this utility model is to provide an intelligent door opening system that solves the problems of inaccurate feedback on door opening position and easy failure of door opening mechanism in existing intelligent vehicle door systems.

[0015] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0016] An intelligent door opening system includes the aforementioned door drive device with encoder, which improves the accuracy of door opening and closing position control.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1) The door drive device with encoder consists of a push rod assembly and a nut assembly that work together to output push-pull door opening action under the action of the driver. A control box is provided at the end of the driver, and a magnetic encoder sensor is provided in the control box. The magnetic encoder sensor detects the rotation state of the driver output shaft in a non-contact manner. Without interfering with the driver, it can accurately detect the position of the push-pull action, realize closed-loop control of the door opening and closing action, and improve the accuracy of door opening control.

[0019] 2) The door drive unit with encoder uses a support to fix the magnet on the output shaft, which is convenient and stable to install. The outer shell of the control box and the end cover of the driver are integrally formed, and the two are riveted together by a slot and a protrusion, which has high connection strength. A sealing ring is provided at the connection gap, and the end cover of the control box is filled with sealant to seal the entire drive unit and improve its service life. The control box, driver and push rod assembly are arranged in the same direction. The overall structure of the drive unit is compact and occupies little installation space, making it suitable for installation and use in narrow spaces. Attached Figure Description

[0020] Figure 1 An isometric view of the door drive device with encoder provided by this utility model;

[0021] Figure 2 A front view of the door drive device with encoder provided by this utility model;

[0022] Figure 3 for Figure 2 Cross-sectional view along line AA;

[0023] Figure 4 for Figure 3A magnified view of part C above;

[0024] Figure 5 An isometric view of the driver and control box assembly provided for this utility model;

[0025] Figure 6 A front view of the driver and control box assembly provided by this utility model;

[0026] Figure 7 for Figure 6 Cross-sectional view along line BB.

[0027] Figure label:

[0028] 1. Push rod assembly; 2. Nut assembly; 21. Ball head pin; 22. Screw sleeve; 23. Ball cup; 24. Spring element; 25. Bushing; 26. Push-pull rod; 3. Lead screw; 4. Housing; 5. Gearbox; 6. Driver; 61. Output shaft; 62. Slot; 7. Control box; 71. Protrusion; 72. End cap; 73. Sealing ring; 8. Magnet; 81. Support; 9. Magnetic encoder sensor; 10. First layer plate; 11. Second layer plate; 12. Pin; 13. Fastener; 14. Encapsulation groove; 15. Insertion interface; 16. Cover plate; 17. Housing; 101. Pin shaft. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] Example 1

[0031] like Figures 1-7As shown, this embodiment discloses a door drive device with an encoder, including a push rod assembly 1, a nut assembly 2, a lead screw 3, a housing 4, a gearbox 5, and a driver 6. The gearbox 5 transmits the power of the driver 6 to the lead screw 3. The nut assembly 2 is threadedly connected to the lead screw 3. One end of the push rod assembly 1 is connected to the nut assembly 2. The housing 4 surrounds the push rod assembly 1 and the nut assembly 2. It also includes a control box 7, which is connected to the outward end of the driver 6. The control box 7 contains a circuit board and a magnetic encoder sensor 9. The driver 6 includes an output shaft 61, the end of which extends into the control box 7. A magnet 8 is provided on the end of the output shaft 61. The magnetic encoder sensor 9 is mounted on the circuit board and is opposite to the magnet 8. The magnetic encoder sensor 9 obtains the displacement of the push rod assembly 1 driven by the driver 6 by non-contact detection of the position of the magnet 8 on the output shaft 61. It can accurately feed back the output displacement, improving the accuracy of the push rod assembly 1 in pushing and pulling the door.

[0032] Furthermore, it also includes a support member 81, which is sleeved on the end of the output shaft 61. The magnet 8 is disposed on the support member 81, and the support member 81 is provided with a groove to accommodate the magnet 8, so as to prevent the magnet 8 from falling off during the rotation of the output shaft 61, and it is convenient to add it to the existing driver 6, reducing the lifting cost.

[0033] Furthermore, the control box 7 includes a housing 17 and a cover plate 16. The housing 17 has an opening at one end facing outwards, and the cover plate 16 is disposed on the opening. The other end of the housing 17 is connected to the driver 6. The driver 6 has an end cap 72 at the end facing the control box 7. The end cap 72 is integrally formed with the housing 17, which reduces manufacturing costs and assembly steps. The outer wall of the driver 6 has a slot 62, and the outer wall of the end cap 72 has a protrusion 71. The protrusion 71 falls into the slot 62 to form a riveting. The slot 62 is a strip-shaped groove near the end of the driver 6 and arranged around the axis of the driver 6. After the protrusion 71 is inserted into the slot 62, it penetrates the outer wall of the driver 6 and extends to the outside. It is bent by a riveting tool to form a riveting, connecting the driver 6 and the control box 7 together. The connection is strong and prevents the magnet 8 and the magnetic code sensor 9 from shaking.

[0034] Furthermore, the circuit board includes a first layer board 10, a second layer board 11, and multiple pins 12. The first layer board 10 is disposed on the inner wall of the housing 17, and the second layer board 11 is disposed parallel to the first layer board 10 above it. The magnetic coding sensor 9 is disposed on the first layer board 10. The two ends of the multiple pins 12 are respectively connected to the first layer board 10 and the second layer board 11. The first layer board 10 is connected to the inner wall of the housing 17 by fasteners 13, which increases the area of ​​the circuit board that can accommodate electronic components and ensures stable and reliable connection.

[0035] Preferably, a potting groove 14 is provided between the cover plate 16 and the inner wall of the housing 17. The potting groove 14 is filled with sealant and is located on the outward end face of the cover plate 16. This facilitates the installation of the cover plate 16 into the housing 17 and subsequent sealing with sealant, thereby sealing the interior and preventing dust and water damage.

[0036] Preferably, the output shaft 61 is supported by cylindrical roller bearings at both ends, with one of the cylindrical roller bearings installed inside the end cover 72 to ensure the rotational stability of the output shaft 61.

[0037] Preferably, a sealing groove is provided on the outer wall of the end cover 72, and a sealing ring 73 is provided in the sealing groove. The sealing ring 73 seals the connection gap between the end cover 72 and the driver 6, which serves to prevent dust and water, and improve the overall sealing degree.

[0038] Furthermore, the control box 7 also includes a connector 15, which is used to connect to the host controller for signal transmission. The connector 15 is located on the outer wall of the housing 17 near the driver 6. The insertion direction of the connector 15 is parallel to the length direction of the push rod assembly 1 and the length direction of the driver 6. There are no gaps between the components, which improves the space utilization. The overall structure is compact and occupies little space for installation, which meets the needs of installation in the car door. It can also be used to drive other opening and closing parts of the car.

[0039] Furthermore, the nut assembly 2 includes a threaded sleeve 22 and a ball head pin 21. The threaded sleeve 22 is threaded onto the lead screw 3, and the ball head pin 21 is disposed on the threaded sleeve 22. The push rod assembly 1 includes a push-pull rod 26, a ball cup 23, a bushing 25, and a spring member 24. The ball cup 23 is disposed on one end of the push-pull rod 26, and the ball head pin 21 falls into the ball cup 23 to form a ball-pin connection. The other end of the push-pull rod 26 is connected to the car door. The bushing 25 is disposed on the inner wall of the ball cup 23. One end of the spring member 24 abuts against the bottom wall of the ball cup 23, and the other end abuts against the surface of the bushing 25. The ball head pin 21 is disposed inside the bushing 25. The spring member 24 plays the role of absorbing the movement gap. The contact surface of the ball-pin connection is spherical, which allows the push-pull rod 26 to adaptively adjust the angle during the rotation and opening and closing of the car door, avoiding mechanical jamming or wear caused by deviation of the side door movement trajectory. Even if the car door undergoes slight deformation after long-term use, it can still open and close normally automatically, ensuring a sufficient service life.

[0040] Among them, the driver 6 is a brushless motor, which is small in size, has stable output, and high control precision; the outward end of the push-pull rod 26 is connected to the pin 101, which connects the push-pull rod 26 to the car door and pushes the car door to rotate open and close.

[0041] Preferably, the lead screw 3 and the push rod assembly 1 are both disposed inside the housing 4, the gearbox 5 is disposed at one end of the housing 4, the driver 6 is disposed side by side with the lead screw 3, the push rod assembly 1 is disposed between the lead screw 3 and the driver 6, and the other end of the push rod assembly 1 extends out of the housing 4, making full use of the space between the lead screw 3 and the driver 6, so that the overall structure is compact and easy to install in narrow car doors.

[0042] The working process of the door drive unit with encoder is as follows:

[0043] When the car door needs to be opened or closed, the output shaft 61 of the driver 6 rotates, driving the gear inside the gearbox 5 to rotate. The gearbox 5 drives the lead screw 3 to rotate, and the screw sleeve 22 on the lead screw 3 moves along the axis of the lead screw 3. The screw sleeve 22 drives the push-pull rod 26 through the ball cup 23 to output a linear push-pull motion, which drives the car door to rotate open or close. The magnet 8 at the end of the output shaft 61 rotates synchronously. The magnetic encoder sensor 9 senses the deformation of the magnet 8 and transmits the rotation information of the output shaft 61 to the outside through the circuit board in the form of an electrical signal. The position of the push-pull rod 26 driving the car door to open or close is fed back to the upper controller, realizing closed-loop control of the car door opening and closing.

[0044] Example 2

[0045] This embodiment also discloses an intelligent door opening system, including a door drive device with an encoder and a sensing end. The sensing end is electrically connected to the control box 7. The sensing end includes a smart key signal, a voice recognition signal, a knock recognition signal, a foot kick sensing signal, and a gesture sensing signal. The system inputs signals from the vehicle to the control box 7, and the control box 7 controls the actuator 6 to achieve door opening control.

[0046] Among them, the control box 7 can collect IGN signals, power supply voltage signals and button signals, and communicate with the outside through the CAN bus to provide feedback on the working status of the output shaft 61, so as to achieve closed-loop control of door opening and improve the accuracy of door control.

[0047] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and any modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A door drive device with encoder, comprising a push rod assembly (1), a nut assembly (2), a lead screw (3), a housing (4), a gearbox (5), and a driver (6), wherein the gearbox (5) transmits power from the driver (6) to the lead screw (3), the nut assembly (2) is threadedly connected to the lead screw (3), one end of the push rod assembly (1) is connected to the nut assembly (2), and the housing (4) surrounds the push rod assembly (1) and the nut assembly (2), characterized in that: It also includes a control box (7), which is connected to the outward end of the driver (6). The control box (7) is provided with a circuit board and a magnetic encoder sensor (9). The driver (6) includes an output shaft (61), the end of which extends into the control box (7). A magnet (8) is provided on the end of the output shaft (61). The magnetic encoder sensor (9) is disposed on the circuit board and is opposite to the magnet (8).

2. The door drive device with encoder according to claim 1, characterized in that: It also includes a support member (81), which is sleeved on the end of the output shaft (61), and the magnet (8) is disposed on the support member (81).

3. The door drive device with encoder according to claim 1, characterized in that: The control box (7) includes a housing (17) and a cover plate (16). The housing (17) has an opening at one end facing outwards, and the cover plate (16) is disposed on the opening. The other end of the housing (17) is connected to the driver (6). The driver (6) has an end cap (72) at one end facing the control box (7). The end cap (72) is integrally formed with the housing (17). The outer wall of the driver (6) is provided with a slot (62), and the outer wall of the end cap (72) is provided with a protrusion (71). The protrusion (71) falls into the slot (62) to form a riveting.

4. The door drive device with encoder according to claim 3, characterized in that: The circuit board includes a first layer board (10), a second layer board (11), and multiple pins (12). The first layer board (10) is disposed on the inner wall of the housing (17), and the second layer board (11) is disposed parallel to the top of the first layer board (10). The magnetic coding sensor (9) is disposed on the first layer board (10), and the two ends of the multiple pins (12) are respectively connected to the first layer board (10) and the second layer board (11).

5. The door drive device with encoder according to claim 3, characterized in that: A potting groove (14) is provided between the cover plate (16) and the inner wall of the housing (17), and the potting groove (14) is filled with sealant.

6. The door drive device with encoder according to claim 3, characterized in that: The end cap (72) has a sealing groove on its outer side wall, and a sealing ring (73) is provided in the sealing groove. The sealing ring (73) seals the connection gap between the end cap (72) and the driver (6).

7. The door drive device with encoder according to claim 3, characterized in that: The control box (7) also includes a plug-in interface (15), which is disposed on the outer side wall of the housing (17) near the driver (6). The plug-in direction of the plug-in interface (15) is parallel to the length direction of the push rod assembly (1) and the length direction of the driver (6).

8. The door drive device with encoder according to claim 7, characterized in that: The nut assembly (2) includes a threaded sleeve (22) and a ball head pin (21). The threaded sleeve (22) is threaded onto the lead screw (3). The ball head pin (21) is disposed on the threaded sleeve (22). The push rod assembly (1) includes a push-pull rod (26), a ball cup (23), a bushing (25), and a spring element (24). The ball cup (23) is disposed on one end of the push-pull rod (26). The ball head pin (21) falls into the ball cup (23) to form a ball-pin connection. The other end of the push-pull rod (26) is connected to the car door. The bushing (25) is disposed on the inner wall of the ball cup (23). One end of the spring element (24) abuts against the bottom wall of the ball cup (23), and the other end abuts against the surface of the bushing (25).

9. The door drive device with encoder according to claim 8, characterized in that: The lead screw (3) and the push rod assembly (1) are both disposed inside the housing (4). The gearbox (5) is disposed at one end of the housing (4). The driver (6) is disposed side by side with the lead screw (3). The push rod assembly (1) is disposed between the lead screw (3) and the driver (6), and the other end of the push rod assembly (1) extends out from the housing (4).

10. An intelligent door opening system, characterized in that: Includes the door drive device with encoder as described in any one of claims 1-9.

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