A tailgate opening and closing device

Abstract

This utility model relates to the technical field of automobile doors, and more particularly to a tailgate opening and closing device for automobiles. It includes a vehicle chassis and a tailgate sheet metal. Two tailgate lower hinges are bolted to the edges of the chassis. The tailgate sheet metal is connected to the chassis via these lower hinges. The chassis and the tailgate sheet metal are also connected by balance bars on both sides. A tailgate actuator is installed within the tailgate sheet metal, and the actuator is bolted to the sheet metal via a rotating mechanism. The actuator is also bolted to the chassis via an actuator bracket. The tailgate design primarily employs a dual balance bar and worm gear drive tailgate actuator, which reduces costs compared to a dual electric strut drive. Compared to a motor-driven self-closing cable pulling the tailgate, the lead screw increases strength. The vertically arranged tailgate actuator saves space in the tailgate sheet metal cavity, reducing actuator costs and improving reliability while maintaining tailgate functionality.

Description

Technical Field

[0001] This utility model relates to an opening and closing device, and more particularly to a bottom door opening and closing device for a car tailgate. Background Technology

[0002] With the development of electric, intelligent, and convenient vehicles, SUVs are often equipped with electric tailgates. Traditional electric tailgates are mainly single-direction roof doors that open towards the roof. The single door rotates upwards using the upper hinge of the tailgate as the rotation point, which takes up a lot of space. To solve the space occupation problem of traditional electric tailgates, some new models often adopt a double-door design. The double-door design includes a roof door that opens towards the roof and a bottom door that opens towards the chassis. In most cases, only the roof door needs to be opened, greatly reducing the space occupied by the rotation of the entire roof door. However, the double-door system used in new models often uses a dual electric strut design or a motor-driven self-closing cable to pull the bottom door. Dual electric struts are more expensive, and the reliability of the cable driven by the motor is not as reliable as that of the turbine-driven rod transmission. Utility Model Content

[0003] The present invention aims to solve the above-mentioned defects and provide a tailgate opening and closing device for automobiles.

[0004] To overcome the defects in the background technology, the technical solution adopted by this utility model to solve its technical problem is as follows: This automobile tailgate bottom door opening and closing device includes a vehicle chassis and a bottom door sheet metal. The edge of the vehicle chassis is connected to two tailgate lower hinges by bolts. The bottom door sheet metal is connected to the vehicle chassis by the tailgate lower hinges. At the same time, the vehicle chassis and the bottom door sheet metal are also connected by balance bars set on both sides. A bottom door actuator is provided in the bottom door sheet metal. The bottom door actuator is bolted to the bottom door sheet metal through a rotating mechanism. The bottom door actuator is bolted to the vehicle chassis through an actuator bracket.

[0005] According to another embodiment of the present invention, the stabilizer bar is further connected at one end to a lower stabilizer bar bracket fixed to the edge of the vehicle chassis, and at the other end to an upper stabilizer bar bracket fixed to the door panel. The lower stabilizer bar bracket is bolted to the vehicle chassis, and the upper stabilizer bar bracket is bolted to the door panel.

[0006] According to another embodiment of the present invention, the ground door actuator further includes a motor, a worm gear, an actuator housing, a lead screw, a pin, a through-hole ball head, an end cover, a rotating mechanism, and a turbine. The motor is connected to the lead screw via the worm gear connected to its motor shaft and meshes with the turbine connected to the lead screw. After the worm gear and the turbine mesh, they are assembled inside the actuator housing and the end cover. The actuator bracket and the lead screw are riveted together via the through-hole ball head and the pin. The rotating mechanism is bolted to the end cover.

[0007] According to another embodiment of the present invention, the ground door driver is further arranged vertically within the ground door sheet metal.

[0008] The beneficial effects of this utility model are as follows: The bottom door opening and closing device of this automobile tailgate adopts a bottom door design mainly consisting of a double balance bar and a worm gear drive. Compared with the double electric strut drive, it reduces costs. Compared with the motor-driven self-closing cable pulling the bottom door, the lead screw increases strength. The vertically arranged bottom door drive saves the gap of the bottom door sheet metal cavity. While ensuring that the bottom door function remains unchanged, it reduces the cost of the bottom door drive and improves reliability. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of another aspect of this utility model; Figure 3 This is a schematic diagram of the structure connecting the vehicle chassis, stabilizer bar, and ground door actuator of this utility model; Figure 4 This is a schematic diagram of the structure of the ground door actuator of this utility model; The components include: 1. Body chassis, 2. Lower stabilizer bar bracket, 3. Stabilizer bar, 4. Upper stabilizer bar bracket, 5. Bottom door sheet metal, 6. Bottom door actuator, 7. Actuator bracket, 8. Lower tailgate hinge, 9. Motor, 10. Worm gear, 11. Actuator housing, 12. Lead screw, 13. Pin, 14. Through-hole ball head, 15. End cap, 16. Rotating mechanism, 17. Turbine. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort in accordance with the embodiments of the basic utility model are within the protection scope of this utility model.

[0012] like Figure 1 , 2As shown in Figure 3, the figure includes a vehicle chassis 1 and a tailgate sheet metal 5. Two tailgate lower hinges 8 are bolted to the edge of the vehicle chassis 1. The tailgate sheet metal 5 is connected to the vehicle chassis 1 via the tailgate lower hinges 8. The vehicle chassis 1 and the tailgate sheet metal 5 are also connected by balance bars 3 on both sides. A tailgate actuator 6 is installed inside the tailgate sheet metal 5. The tailgate actuator 6 is bolted to the tailgate sheet metal 5 via a rotating mechanism 16 and bolted to the vehicle chassis 1 via an actuator bracket 7. Compared to the traditional dual electric strut design or motor-driven self-closing cable system for pulling the tailgate, the dual electric strut drive reduces costs. Compared to the motor-driven self-closing cable system, the lead screw increases strength. The vertically arranged tailgate actuator saves space in the tailgate sheet metal cavity, reducing the cost of the tailgate actuator and improving reliability while maintaining the same tailgate function.

[0013] One end of the stabilizer bar 3 is connected to the lower stabilizer bar bracket 2 fixed to the edge of the chassis 1, and the other end is connected to the upper stabilizer bar bracket 4 fixed inside the door panel 5. The lower stabilizer bar bracket 2 is bolted to the chassis 1, and the upper stabilizer bar bracket 4 is bolted to the door panel 5. The stabilizer bar 3 mainly consists of a gas spring and a ball joint. Two stabilizer bars 3 form a double stabilizer bar structure.

[0014] The ground door actuator 6 includes a motor 9, a worm gear 10, an actuator housing 11, a lead screw 12, a pin 13, a through-hole ball head 14, an end cover 15, a rotating mechanism 16, and a turbine 17. The motor 9 is connected to the lead screw 12 through the worm gear 10 connected inside it, and meshes with the turbine 17 connected to the lead screw 12. After the worm gear 10 and the turbine 17 mesh, they are assembled in the actuator housing 11 and the end cover 15. The rotating mechanism 16 is bolted to the end cover 15. The lead screw 12, worm gear 10, motor 9, end cap, and turbine 17 are assembled in the drive housing 11 and end cover 15. The lead screw 12 passes through the turbine 17 and is threadedly connected to the turbine 17. The drive bracket 7 and the lead screw 12 are riveted together through the through-hole ball head 14 and the pin 13. The drive bracket 7 can rotate around the pin 13. The end cover 15 is bolted to the rotating mechanism 16. The vertically arranged ground door drive 6 drives the lead screw 12 to extend and retract through the motor 9, so that the ground door sheet metal 5 rotates around the tailgate lower hinge 8, realizing the rotation opening and closing of the ground door. The vertically arranged ground door drive 6 makes the turbine drive rod 12 move vertically within the ground door sheet metal 5, saving the cavity clearance of the ground door sheet metal 5.

[0015] The ground door actuator 6 is vertically arranged within the ground door sheet metal 5. The vertical arrangement of the ground door actuator saves space in the ground door sheet metal cavity, reduces the cost of the ground door actuator and improves reliability while ensuring that the ground door function remains unchanged.

[0016] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A ground door opening and closing device of an automobile tail gate, comprising a vehicle body chassis (1) and a ground door panel (5), characterized in that: The edge of the chassis (1) is connected to two tailgate lower hinges (8) by bolts. The bottom door sheet metal (5) is connected to the chassis (1) by the tailgate lower hinges (8). The chassis (1) and the bottom door sheet metal (5) are also connected by balance bars (3) on both sides. The bottom door sheet metal (5) is equipped with a bottom door driver (6). The bottom door driver (6) is bolted to the bottom door sheet metal (5) by a rotating mechanism (16). The bottom door driver (6) is bolted to the chassis (1) by a driver bracket (7).

2. The tailgate opening and closing device for a car as described in claim 1, characterized in that: One end of the balance bar (3) is connected to the lower balance bar bracket (2) fixed on the edge of the chassis (1), and the other end is connected to the upper balance bar bracket (4) fixed on the bottom door sheet metal (5). The lower balance bar bracket (2) is connected to the chassis (1) by bolts, and the upper balance bar bracket (4) is connected to the bottom door sheet metal (5) by bolts.

3. The tailgate opening and closing device for a car as described in claim 1, characterized in that: The ground door actuator (6) includes a motor (9), a worm gear (10), an actuator housing (11), a lead screw (12), a pin (13), a through-hole ball head (14), an end cover (15), a rotating mechanism (16), and a turbine (17). The motor (9) is connected to the lead screw (12) through the worm gear (10) connected inside it and meshes with the turbine (17) connected to the lead screw (12). After the worm gear (10) and the turbine (17) mesh, they are assembled in the actuator housing (11) and the end cover (15). The actuator bracket (7) is riveted to the lead screw (12) through the through-hole ball head (14) and the pin (13). The rotating mechanism (16) is bolted to the end cover (15).

4. The tailgate opening and closing device for a car as described in claim 1, characterized in that: The ground door actuator (6) is arranged vertically within the ground door sheet metal (5).

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