An improved structure of the drive mechanism for an electric sliding door in a car

Abstract

This utility model belongs to the technical field of electric sliding doors, and provides an improved structure for the drive device of an automotive electric sliding door. It includes a main housing, a front guide seat, a rear guide seat, a front pull cable, a rear pull cable, two tension wheels, a winding wheel, and a main drive device. The main drive device includes a brushless motor composed of a rotor assembly and a stator assembly, and a transmission structure. The transmission structure includes a worm gear, a worm, and an output shaft. The winding wheel is connected to the output shaft via a spline, and the worm is connected to the rotor assembly. Under energized conditions, the rotor assembly rotates automatically. The worm in the rotor assembly drives the worm gear to rotate, thereby rotating the output shaft fixed on the worm gear, which in turn causes the winding wheel to rotate. The advantages of this utility model are that it uses a brushless motor drive, eliminating the need for an electromagnetic clutch, resulting in a lighter, smaller, lower-cost, and more reliable drive device.

Description

Technical Field

[0001] This utility model belongs to the field of electric sliding door technology, and relates to an improved structure of the drive device on an electric sliding door for automobiles. Background Technology

[0002] With the rapid development of automotive electrification, connectivity, intelligence, and sharing, electric sliding doors are becoming increasingly common in automobiles. Electric sliding doors are easy to operate and greatly enhance customer comfort and convenience. Given the increasingly stringent cost control requirements of OEMs, and while ensuring functional compliance with user needs, our company has invented this drive device for electric sliding doors. Most existing conventional electric sliding door drives use electromagnetic clutches, which have the following drawbacks: The electromagnetic clutch in a typical electric sliding door drive is mounted on a turbine or a transmission component ultimately connected to the winding device. The stationary plate is fixed, and the rotating plate provides torque. Insufficient friction results in low torque, making slippage prone to occur, and increasing torque is difficult. Higher torque leads to higher costs and larger size, increasing manufacturing difficulty, complexity, and precision requirements. Furthermore, existing brushed motor drives are relatively noisy. Therefore, improvements to existing drive devices for automotive electric sliding doors are necessary. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an improved structure for the drive device of an electric sliding door for automobiles that is clutchless, lighter, smaller, lower in cost, and more reliable in order to address the current state of the technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an improved structure of the drive device on an electric sliding door of an automobile, including a main housing, a front guide seat, a rear guide seat, a front pull cable, a rear pull cable, two tension wheels, a winding wheel, and a main drive device. The two tension wheels, the winding wheel, and the main drive device are installed inside the main housing. The front guide seat is installed on the sheet metal inside the C-pillar of the automobile, and the rear guide seat is installed on the sheet metal inside the D-pillar of the automobile. The front pull cable and the rear pull cable are installed on the hinge of the automobile, and the front pull cable and the rear pull cable are wound around the tension wheels and the winding wheel. The main drive unit drives the winding wheel to move, so that the front and rear cables are wound and unwound via the tension wheel and the winding wheel. The main drive unit includes a brushless motor composed of a rotor assembly and a stator assembly, and a transmission structure. The transmission structure includes a worm gear, a worm, and an output shaft. The winding wheel is connected to the output shaft via a spline. The worm is connected to the rotor assembly. When energized, the rotor assembly rotates automatically. The worm of the rotor assembly drives the worm gear to rotate, thereby causing the output shaft fixed on the worm gear to rotate, which in turn causes the winding wheel to rotate.

[0005] In the above-mentioned improved structure of the drive device on an electric sliding door for automobiles, the rotor assembly of the brushless motor is fixed on the worm gear, the stator assembly is fixed in the main housing by a limiting device, and a Hall sensor is assembled on the end of the stator assembly. The Hall sensor monitors the travel and speed of the sliding door in real time and calibrates the opening and closing position.

[0006] In the aforementioned improved drive device structure for an electric sliding door for automobiles, the worm gear of the transmission structure is a double-headed or multi-headed worm gear, and the output shaft and worm wheel are integrally injection molded.

[0007] In the above-mentioned improved structure of the drive device on an electric sliding door for automobiles, the winding wheel is fixed to the output shaft by a spline connection, and the front and rear cables are respectively fixed to the upper and lower end faces of the winding wheel to realize the winding and unwinding of the front and rear cables, thereby realizing the automatic opening or closing of the sliding door.

[0008] In the above-mentioned improved structure of the drive device on an electric sliding door of an automobile, the tensioning wheel has a tensioning wheel shaft, the tensioning wheel is mounted on the tensioning wheel shaft, the main housing has a housing cover, the upper and lower ends of the tensioning wheel shaft move in the grooves of the main housing and the housing cover respectively, and two tensioning springs are installed on the upper and lower ends of the tensioning wheel shaft, the tensioning springs are connected between the two tensioning wheel shafts and keep the tensioning wheel in a tensioned state.

[0009] In the above-mentioned improved structure of the drive device on an electric sliding door for automobiles, a buffer block is assembled at the end of the main housing and the housing cover groove.

[0010] In the aforementioned improved drive mechanism structure for an electric sliding door for automobiles, a tensioning wheel cover is mounted on the top of the main housing and the housing cover.

[0011] Compared with the prior art, the advantages of this utility model are that it uses a brushless motor drive and does not have an electromagnetic clutch, making the drive device lighter, smaller, lower in cost and more reliable. The Hall sensor can monitor the travel and speed of the sliding door in real time and calibrate the opening and closing position. The transmission structure adopts a worm gear structure, which has low noise. Attached Figure Description

[0012] Figure 1 This is an exploded view of the improved drive mechanism on the electric sliding door of this car. Detailed Implementation

[0013] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0014] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0015] In the diagram, the main housing is 100; the front guide seat is 200; the rear guide seat is 300; the front cable is 400; the rear cable is 500; the tension wheel is 600; the tension wheel shaft is 6001; the winding wheel is 700; the rotor assembly is 800; the stator assembly is 900; the Hall sensor is 1000; the worm gear is 1001; the worm is 1002; the output shaft is 1003; the housing cover is 1004; the tension spring is 1005; the buffer block is 1006; and the tension wheel cover is 1007.

[0016] like Figure 1 As shown, the improved drive mechanism structure of this electric sliding door includes a main housing 100, a front guide seat 200, a rear guide seat 300, a front pull cable 400, a rear pull cable 500, two tension rollers 600, a winding reel 700, and a main drive unit. The two tension rollers 600, the winding reel 700, and the main drive unit are installed inside the main housing 100. The front guide seat 200 is installed on the sheet metal inside the C-pillar of the car, and the rear guide seat 300 is installed on the sheet metal inside the D-pillar of the car. The front pull cable 400 and the rear pull cable 500 are installed on the hinge of the car. The front pull cable 400 and the rear pull cable 500 are wound around the tension rollers 600 and the winding reel 700. The drive device drives the winding wheel 700 to move, so that the front cable 400 and the rear cable 500 are wound and released through the tension wheel 600 and the winding wheel 700. The main drive device includes a brushless motor composed of a rotor assembly 800 and a stator assembly 900 and a transmission structure. The main innovation of this patent is the use of a brushless motor. The rotor assembly 800 of the brushless motor is fixed on the worm gear 1002, and the stator assembly 900 is fixed in the main housing 100 by a limit. A Hall sensor 1000 is installed on the end of the stator assembly 900. The Hall sensor 1000 monitors the travel and speed of the sliding door in real time and calibrates the opening and closing position.

[0017] The transmission structure includes a worm gear 1001, a worm 1002, and an output shaft 1003. The winding wheel 700 is connected to the output shaft 1003 via a spline. The worm 1002 is connected to the rotor assembly 800. The worm 1002 of the transmission structure is a double-start or multi-start worm, and the output shaft 1003 and the worm gear 1001 are integrally injection molded, making the overall structure robust. Under energized conditions, the rotor assembly 800 rotates automatically. The worm of the rotor assembly 800 drives the worm gear 1001 to rotate, thereby causing the output shaft 1003, which is fixed on the worm gear 1001, to rotate, which in turn causes the winding wheel 700 to rotate.

[0018] To ensure the stability of the entire winding wheel 700 rotation, the winding wheel 700 is fixed to the output shaft 1003 by a spline connection. The front pull cable 400 and the rear pull cable 500 are respectively fixed to the upper and lower end faces of the winding wheel 700 to realize the extension and retraction of the front and rear pull cables 500, thereby realizing the automatic opening or closing of the sliding door. The tension wheel 600 has a tension wheel shaft 6001, and the tension wheel 600 is mounted on the tension wheel shaft 6001. The main housing 100 has a housing cover 1004. The upper and lower ends of the tension wheel shaft 6001 move in the grooves of the main housing 100 and the housing cover 1004, respectively. Two tension springs are installed on the upper and lower ends of the tension wheel shaft 6001. Spring 1005, tension spring 1005 is connected between two tension wheel shafts 6001 and keeps tension wheel 600 in a tensioned state. In this way, during the automatic operation of the sliding door, tension spring 1005 can make the cable at the force end and the cable at the driven end both subjected to tension force, thereby achieving cable tension. Buffer blocks 1006 are installed at the ends of the grooves of the main housing 100 and housing cover 1004. The buffer blocks 1006 are installed at the ends to prevent tension wheel shaft 6001 from hitting the main housing 100 and causing noise. Tension wheel cover 1007 is installed on the top of the main housing 100 and housing cover 1004 to prevent dust from entering the main housing 100.

[0019] When powered on, the rotor assembly 800 of the brushless motor rotates automatically, and the worm 1002 on the stator assembly 900 drives the worm wheel 1001 to rotate, thereby driving the output shaft 1003 fixed on the worm wheel 1001 to rotate. The winding wheel 700 is connected to the output shaft 1003 through a spline and is fixed in the axial direction with a shaft retaining ring, thereby realizing the automatic winding and unwinding of the front pull cable 400 and the rear pull cable 500 wound on the winding wheel 700. The front pull cable 400 and the rear pull cable 500 are connected to the middle hinge on the sliding door, ultimately achieving the automatic opening or closing of the middle sliding door. Under non-powered conditions, because the magnetic groove torque of the brushless motor is relatively small, when the door is manually pulled, the worm wheel 1001 on the output shaft 1003 can flexibly drive the worm 1002 to rotate, thereby realizing the manual opening and closing function of the door.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by the spirit of this utility model.

Claims

1. An improved structure for a drive mechanism on an electric sliding door of an automobile, comprising a main housing, a front guide seat, a rear guide seat, a front pull cable, a rear pull cable, two tensioning pulleys, a winding pulley, and a main drive device. The two tensioning pulleys, the winding pulley, and the main drive device are installed inside the main housing. The front guide seat is installed on the sheet metal inside the C-pillar of the automobile, and the rear guide seat is installed on the sheet metal inside the D-pillar of the automobile. The front and rear pull cables are installed on the hinge of the automobile. The front and rear pull cables are wound around the tensioning pulleys and the winding pulley. The main drive device drives the winding pulley to move, thereby enabling the front and rear pull cables to be extended and retracted via the tensioning pulleys and the winding pulley. The main drive device is characterized in that... The main drive device includes a brushless motor consisting of a rotor assembly and a stator assembly, and a transmission structure. The transmission structure includes a worm gear, a worm, and an output shaft. The winding wheel is connected to the output shaft via a spline. The worm is connected to the rotor assembly. When energized, the rotor assembly rotates automatically. The worm in the rotor assembly drives the worm gear to rotate, thereby causing the output shaft fixed on the worm gear to rotate, which in turn causes the winding wheel to rotate.

2. The improvement in the drive arrangement for an automotive power sliding door of claim 1 wherein, The rotor assembly of the brushless motor is fixed on the worm gear, and the stator assembly is fixed in the main housing by a limiting device. A Hall sensor is installed on the end of the stator assembly. The Hall sensor monitors the travel and speed of the sliding door in real time and calibrates the opening and closing position.

3. An improved structure for the drive device on an electric sliding door of an automobile, as described in claim 2, is characterized in that... The worm gear in the transmission structure is a double-start or multi-start worm gear, and the output shaft and worm wheel are integrally injection molded.

4. The improvement according to claim 3, wherein the drive device is characterized by the fact that the drive device is a motor. The winding wheel is fixed to the output shaft by a spline connection. The front and rear cables are fixed to the upper and lower ends of the winding wheel, respectively, so as to realize the winding and unwinding of the front and rear cables, thereby realizing the automatic opening or closing of the sliding door.

5. The improvement according to claim 4, wherein the drive device is an electric drive device. The tensioning wheel has a tensioning wheel shaft, the tensioning wheel is mounted on the tensioning wheel shaft, the main housing has a housing cover, the upper and lower ends of the tensioning wheel shaft move in the grooves of the main housing and the housing cover respectively, and two tensioning springs are installed on the upper and lower ends of the tensioning wheel shaft. The tensioning springs are connected between the two tensioning wheel shafts and keep the tensioning wheel in a tensioned state.

6. The improvement in the drive arrangement for an automotive power sliding door of claim 5 wherein, The main housing and the end of the housing cover groove are fitted with buffer blocks.

7. The improvement in the drive arrangement for an automotive power sliding door of claim 6 wherein, The main housing and housing cover are equipped with tension wheel covers.

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