Car door driving mechanism adopting synchronous belt transmission

Abstract

The utility model provides a car door driving mechanism adopting synchronous belt transmission, which comprises a swing arm driving unit, the swing arm driving unit comprises a speed reduction motor, a swing arm shell, a small bevel gear, a bevel combination gear and a synchronous belt wheel combination gear, the swing arm shell is arranged on a car door, the speed reduction motor is arranged in the swing arm shell, and the bevel gear is arranged on the bevel combination gear. A small bevel gear is arranged on an output shaft of the gear motor, the bevel combination gear and the synchronous belt wheel combination gear are installed in the swing arm shell through a first connecting shaft and a second connecting shaft respectively, and a bevel gear part of the bevel combination gear is meshed with the small bevel gear. According to the utility model, the technical universality is strong, the original guide rail does not need to be replaced, the vehicle body is slightly changed, the problem that the automatic door and the manual operation cannot be freely switched can be solved, the driving form and the structural form of the gear and the synchronous belt are simple, the cost is low, and the influence of dust and water on the transmission structure is reduced through the swing arm shell.

Description

Technical Field

[0001] This utility model relates to the field of automotive door accessories technology, and in particular to a door drive mechanism using synchronous belt drive. Background Technology

[0002] Most electric sliding doors on the market today use a wire rope drive system for the middle guide rail and a rack and pinion drive system for the lower guide rail. Wire rope drive electric sliding doors are increasingly used in the aftermarket due to their simple structure, easy installation, and minimal modifications to the original vehicle. However, this traditional wire rope system is a closed-loop structure. The drive motor is mounted on the rear side panel of the vehicle, and wires are led out from both ends of the winding reel and hung at the guide wheel of the middle guide rail. These two sections of wire are in close contact with the inner wall of the guide rail. When opening and closing the door, these two sections of wire slide against the inner wall of the guide rail, creating sliding friction. After a period of use, the wire rope is prone to breakage, failing to meet the OEM's requirement of a lifespan of more than 35,000 cycles. For example, the automotive door bevel gear drive mechanism disclosed in Chinese Patent Application No. 202320411233.5 is a lower guide rail gear rack transmission method, including: a body sheet metal part and a door. A rack is provided on the body sheet metal part near the door. A lower sliding wheel arm assembly that meshes with the rack is provided at the bottom end of the door. A reduction motor is provided in the lower sliding wheel arm assembly. The output end of the reduction motor is connected to a second spur gear through a transmission structure. The second spur gear meshes with the rack. However, the main disadvantage of the lower guide rail gear rack transmission method is that the gear rack is mechanically meshed, resulting in high transmission noise. It requires modification of the original vehicle guide rail, which involves significant changes to the original vehicle body. In addition, the available space in the Y direction of the guide rail is small. Under the same space, this technology is difficult to meet the strength requirements of the sliding door retaining parts in the national standard. Therefore, a door drive mechanism using synchronous belt drive is needed. By using a gear and synchronous belt drive, the structure is simple and can solve the problems of high cost and low reliability of electric sliding doors. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a door drive mechanism using synchronous belt transmission. By employing a gear and synchronous belt drive, the structure is simple and can solve the problems of high cost and low reliability of electric sliding doors.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes a door drive mechanism using synchronous belt drive, comprising:

[0006] Swing arm drive unit, the drive unit includes a reduction motor, a swing arm housing, a small bevel gear, a conical combination gear, and a synchronous pulley combination gear. The swing arm housing is installed on the vehicle door, the reduction motor is installed in the swing arm housing, and a small bevel gear is provided on the output shaft of the reduction motor. The conical combination gear and the synchronous pulley combination gear are respectively installed in the swing arm housing through a first connecting shaft and a second connecting shaft. The bevel gear part of the conical combination gear meshes with the small bevel gear, and the spur gear part of the conical combination gear meshes with the synchronous pulley combination gear;

[0007] Synchronous belt execution unit, the synchronous belt execution unit includes a synchronous belt and a fixing block. Both ends of the synchronous belt are connected to the vehicle side through the fixing block, and the middle part of the synchronous belt meshes with the synchronous pulley combination gear.

[0008] Further, the swing arm drive unit further includes a guide wheel support. One end of the guide wheel support is hinged to the swing arm housing through a second connecting shaft. Guide wheels are installed on the upper part and the side of the guide wheel support. The swing arm drive unit is slidably connected to the track on the vehicle side through the guide wheels.

[0009] Further, a third connecting shaft is provided on the upper part of the guide wheel support. The guide wheel is installed on the upper part of the third connecting shaft, and a synchronous belt guide wheel is installed in the middle of the third connecting shaft. The synchronous belt is wound in a "zigzag" shape around the synchronous belt guide wheel and the synchronous pulley combination gear.

[0010] Further, the swing arm housing includes a swing arm upper housing and a swing arm lower housing, and the swing arm upper housing and the swing arm lower housing are connected to each other by bolts.

[0011] Further, the swing arm upper housing is connected to the vehicle door through an L-shaped connecting door bracket.

[0012] Further, a synchronous belt engagement retaining block is installed on the swing arm lower housing. The lower part of the synchronous belt engagement retaining block is fixedly connected to the swing arm lower housing, and the synchronous belt engagement retaining block presses against the side of the synchronous belt through rollers.

[0013] Advantages of the present utility model:

[0014] 1. The transmission is carried out through a synchronous belt, with strong technical versatility. There is no need to replace the original guide rail, and the modification to the vehicle body is small. It is mainly applicable to the upgrade of manual doors in the aftermarket to electric sliding doors;

[0015] 2. By using a reduction drive motor, bevel gears, and spur gears for transmission, the problem of the inability to freely switch between automatic doors and manual operations can be solved;

[0016] 3. By adopting the drive form of gears and synchronous belts, the structural form is simple, and the problems of high cost and low reliability of electric sliding doors can be solved;

[0017] 4. The impact of dust and water on the transmission structure is reduced by using the swing arm housing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the drive unit of this utility model;

[0020] Figure 3 This is a schematic diagram of the synchronous belt execution unit of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the drive unit of this utility model;

[0022] Figure 5 This is a schematic diagram of the lower structure of the drive unit of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the synchronous belt engagement retaining block of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the guide wheel support of this utility model;

[0025] In the diagram: 1-Drive unit, 101-Gear motor, 102-Swing arm housing, 103-Small bevel gear, 104-Bevel combination gear, 105-Synchronous belt pulley combination gear, 106-First connecting shaft, 107-Second connecting shaft, 108-Guide wheel support, 109-Guide wheel, 110-Third connecting shaft, 111-Synchronous belt guide wheel, 112-L-shaped connecting door bracket, 113-Synchronous belt engagement retaining block, 2-Synchronous belt actuator, 201-Synchronous belt, 202-Fixing block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Throughout the description, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] like Figures 1 to 7 As shown, one embodiment of this utility model provides a door drive mechanism using synchronous belt drive, including: a swing arm drive unit 1, the drive unit 1 including a reduction motor 101, a swing arm housing 102, a small bevel gear 103, a bevel combination gear 104, and a synchronous belt pulley combination gear 105. The swing arm housing 102 is mounted on the door, the reduction motor 101 is mounted in the swing arm housing 102, and the output shaft of the reduction motor 101 is provided with the small bevel gear 103, the bevel combination gear 104, and the synchronous belt pulley combination gear. 105 is installed in the swing arm housing 102 via the first connecting shaft 106 and the second connecting shaft 107 respectively. The bevel gear part of the bevel combination gear 104 meshes with the small bevel gear 103, and the spur gear part of the bevel combination gear 104 meshes with the synchronous belt pulley combination gear 105. The synchronous belt execution unit 2 includes a synchronous belt 201 and a fixing block 202. The two ends of the synchronous belt 201 are connected to the side of the vehicle via the fixing block 202, and the middle part of the synchronous belt 201 meshes with the synchronous belt pulley combination gear 105.

[0030] The swing arm drive unit 1 is mounted on the door via an L-shaped connecting door bracket 112. The synchronous belt actuator 2 is mounted on the vehicle, and the synchronous belt 201 of the synchronous belt actuator 2 meshes with the synchronous belt pulley combination gear 105 on the drive unit 1. When the sliding door of the vehicle needs to open or close, the shaft of the reduction motor 101 drives the small bevel gear 103 to rotate. The small bevel gear 103 meshes with the bevel gear part of the bevel combination gear 104, so the reduction motor 101 can drive the bevel combination gear 104 and the synchronous belt pulley combination gear 105 to rotate. In turn, the synchronous belt 201 is driven by the synchronous belt pulley combination gear 105. Since the two ends of the synchronous belt 201 are fixedly connected to the vehicle, the drive unit 1 applies a lateral thrust to the door under the drive of the synchronous belt pulley combination gear 105, thereby realizing the opening and closing of the vehicle-connected sliding door.

[0031] This drive mechanism uses a synchronous belt for transmission, offering strong technical versatility. It eliminates the need to replace the original guide rails and requires minimal modification to the vehicle body. It is primarily suitable for upgrading manual doors to electric sliding doors in the aftermarket. Simultaneously, when the user manually pushes the sliding door, the synchronous belt 201 drives the synchronous belt pulley combination gear 105, the bevel combination gear 104, and the small bevel gear 103 to rotate, allowing the door to be pushed manually and enabling free switching between automatic and manual operation. The gear and synchronous belt drive system features a simple structure, low noise, and solves the problems of high cost and low reliability associated with electric sliding doors. Furthermore, the gear motor and other mechanisms are installed in the swing arm housing 102, allowing the swing arm housing 102 to extend into the reserved space on the side of the vehicle after the door is closed, thereby reducing the impact of external dust and rainwater on the transmission structure and extending the service life of the drive mechanism.

[0032] In a preferred embodiment, such as Figure 4 As shown, the swing arm drive unit 1 also includes a guide wheel support 108. One end of the guide wheel support 108 is hinged to the swing arm housing 102 via a second connecting shaft 107. Guide wheels 109 are installed on the upper part and side of the guide wheel support 108. The swing arm drive unit 1 is slidably connected to the track on the side of the vehicle via the guide wheels 109. The guide wheel support 108 can swing around the second connecting shaft 107 as the center, and can automatically adapt to the angle between the drive unit 1 and the synchronous belt 201, so that the synchronous belt 201 can smoothly enter the drive unit 1 and mesh well with the synchronous belt pulley combination gear 105. The guide wheel 109 is slidably connected to the track on the side of the vehicle, and can limit the door during operation, which facilitates the sliding of the door.

[0033] Specifically, such as Figure 7As shown, a third connecting shaft 110 is provided on the upper part of the guide wheel support 108. The guide wheel 109 is installed on the upper part of the third connecting shaft 110. A timing belt guide wheel 111 is installed in the middle of the third connecting shaft 110. The timing belt 201 is wound in a "V" shape around the timing belt guide wheel 111 and the timing belt wheel combination gear 105. Since one side of the timing belt has teeth, the timing belt 201 is wound in a "V" shape around the timing belt guide wheel 111 and the timing belt wheel combination gear 105. Under the action of the tension of the timing belt 201, the timing belt 201 can be more closely engaged with the timing belt wheel combination gear 105, preventing the occurrence of tooth skipping during operation.

[0034] In a preferred embodiment, the swing arm housing 102 includes an upper swing arm housing and a lower swing arm housing. The upper swing arm housing and the lower swing arm housing are connected to each other by bolts. The upper swing arm housing and the lower swing arm housing provide support positions for the installation of the gears. At the same time, the swing arm housing 102 can reduce the erosion of dust and rain on the gears and the motor, thereby improving the reliability and service life of the gears and the motor.

[0035] Preferably, as Figure 1 shown, the upper swing arm housing is connected to the vehicle door through an L-shaped connecting vehicle door bracket 112. There are multiple oblong holes on the L-shaped connecting vehicle door bracket 112, which can conveniently adjust the installation position and angle of the drive unit 1, improve the versatility of the drive unit 1, and facilitate the modification and upgrade of the vehicle sliding door.

[0036] In a preferred embodiment, as Figure 6 shown, a timing belt engagement retaining block 113 is installed on the lower swing arm housing. The lower part of the timing belt engagement retaining block 113 is fixedly connected to the lower swing arm housing. The timing belt engagement retaining block 113 presses against the side of the timing belt 201 through rollers, preventing the timing belt 201 from loosening and causing tooth disengagement or tooth jitter during the meshing operation with the timing belt wheel combination gear 105, and ensuring the stable operation of Unit 1.

[0037] Certainly, the present utility model can also have many other implementation manners. Based on this implementation manner, other implementation manners obtained by those of ordinary skill in the art without any creative work belong to the scope protected by the present utility model.

Claims

1. A door drive mechanism employing synchronous belt drive, characterized by, The utility model relates to a swing arm drive unit (1), the drive unit (1) includes reduction motor (101), swing arm casing (102), small bevel gear (103), cone combination gear (104), synchronous pulley combination gear (105), the swing arm casing (102) is installed on the door, the reduction motor (101) is installed in swing arm casing (102), is equipped with small bevel gear (103) on the output shaft of reduction motor (101), the cone combination gear (104) and synchronous pulley combination gear (105) are installed in swing arm casing (102) through first connecting shaft (106) and second connecting shaft (107) respectively, the bevel gear part of cone combination gear (104) is engaged with small bevel gear (103), and the spur gear part of cone combination gear (104) is engaged with synchronous pulley combination gear (105); Synchronous belt execution unit (2), the synchronous belt execution unit (2) includes synchronous belt (201) and fixed block (202), both ends of the synchronous belt (201) are connected with the side of vehicle through fixed block (202), and the middle part of the synchronous belt (201) is engaged with synchronous pulley combination gear (105). The swing arm drive unit (1) further includes a guide wheel support (108), one end of the guide wheel support (108) is hinged to the swing arm casing (102) through the second connecting shaft (107), the upper part and the side of the guide wheel support (108) are provided with a guide wheel (109), and the swing arm drive unit (1) is slidably connected with the track of the side of the vehicle through the guide wheel (109).

2. A door drive mechanism employing a synchronous belt drive according to claim 1, characterized in that, The upper part of the guide wheel support (108) is provided with a third connecting shaft (110), the guide wheel (109) is installed on the upper part of the third connecting shaft (110), the middle part of the third connecting shaft (110) is provided with a synchronous belt guide wheel (111), and the synchronous belt (201) is wound in the shape of "several” on the synchronous belt guide wheel (111) and the synchronous pulley combination gear (105).

3. A door drive mechanism employing a synchronous belt drive according to claim 2, characterized in that, The swing arm casing (102) includes an upper swing arm casing and a lower swing arm casing, and the upper swing arm casing and the lower swing arm casing are connected to each other by bolts.

4. The door drive mechanism employing a synchronous belt drive according to claim 1, wherein The upper swing arm casing is connected with the door through an L-shaped connecting door support (112).

5. A door drive mechanism employing a synchronous belt drive as claimed in claim 4, characterized in that The lower swing arm casing is provided with a synchronous belt engagement retaining block (113), the lower part of the synchronous belt engagement retaining block (113) is fixedly connected with the lower swing arm casing, and the synchronous belt engagement retaining block (113) is extruded on the side of the synchronous belt (201) through a roller.

6. A door drive mechanism employing a synchronous belt drive as set forth in claim 4, wherein ​

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