Ground door opening and closing device of automobile tail door

Abstract

The invention relates to the technical field of automobile doors, in particular to a ground door opening and closing device of an automobile tail door. Comprising a vehicle body chassis and a ground door metal plate, the edge of the vehicle body chassis is connected with two tail door lower hinges through bolts, the ground door metal plate is connected with the vehicle body chassis through the tail door lower hinges, meanwhile, the vehicle body chassis is connected with the ground door metal plate through balance rods arranged on the two sides, and a ground door driver is arranged in the ground door metal plate; the ground door driver is in bolted connection with a ground door metal plate through a rotating mechanism, and the ground door driver is in bolted connection with a vehicle body chassis through a driver support. An adopted ground door is mainly designed to be a ground door driver with double balance rods and turbine worm transmission, compared with double electric supporting rod driving, cost is reduced, compared with a motor driving self-closing inhaul cable to pull the ground door to move, strength is improved through a lead screw, a ground door metal plate cavity gap is saved through the vertically-arranged ground door driver, and under the condition that the function of the ground door is not changed, the ground door is more convenient to use. The cost of the ground door driver is reduced, and the reliability is improved.

Description

Technical Field

[0001] The invention relates to an opening and closing device, in particular to an opening and closing device for a tailgate of an automobile. Background Art

[0002] With the development of automobile electrification, intelligence and convenience, SUV models are often equipped with electric tailgates. Traditional electric tailgates are mainly one-way sky doors that open toward the roof side. The single door rotates upward with the upper hinge of the tailgate as the rotation point, which takes up a lot of space. In order to solve the problem of space occupied by traditional electric tailgate opening and closing, some new car models often adopt a sky door design for the tailgate. The tailgate designed by the sky door includes a sky door that opens toward the roof and a ground door that opens toward the chassis side. In the use of the tailgate, in most cases only the sky door needs to be opened, which greatly reduces the space occupied by the rotation of the entire sky door fan. However, the sky door system ground doors used in new models mostly use a double electric strut design or a motor-driven self-closing cable to pull the ground door movement. The double electric struts are more expensive, while the motor-driven self-closing cable drives the ground door movement, and the cable reliability is not as reliable as the turbine drive rod transmission. Summary of the Invention

[0003] The present invention aims to solve the above-mentioned defects and provides a floor door opening and closing device for a car tailgate.

[0004] In order to overcome the defects existing in the background technology, the technical solution adopted by the present invention to solve its technical problems is: the ground door opening and closing device of the automobile tailgate includes a vehicle body chassis and a ground door sheet metal, the edge of the vehicle body chassis is connected to two tailgate lower hinges by bolts, and the ground door sheet metal is connected to the vehicle body chassis through the tailgate lower hinge. At the same time, the vehicle body chassis and the ground door sheet metal are also connected by a balance bar arranged on both sides. A ground door driver is provided in the ground door sheet metal, and the ground door driver is bolted to the ground door sheet metal through a rotating mechanism. The ground door driver is bolted to the vehicle body chassis through a driver bracket.

[0005] According to another embodiment of the present invention, the balance bar further includes one end of the balance bar connected to a lower balance bar bracket fixed to the edge of the vehicle body chassis, and the other end connected to an upper balance bar bracket fixed on the ground door sheet metal, the lower balance bar bracket is connected to the vehicle body chassis by bolts, and the upper hinge of the balance bar is connected to the ground door sheet metal by bolts.

[0006] According to another embodiment of the present invention, the ground door drive further includes a motor, a worm, a drive housing, a screw, a pin, a through-hole ball head, an end cover, a rotating mechanism and a turbine. The motor is connected to the screw through a worm connected to its motor shaft, and engages with the turbine connected to the screw. After the worm and the turbine engage, they are assembled in the drive housing and the end cover. The drive bracket and the screw are connected by a through-hole ball head and a pin through riveting, and the rotating mechanism is connected by bolts on the end cover.

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

[0008] The beneficial effects of the present invention are: the ground door design adopted by the ground door opening and closing device of the automobile tailgate is mainly a ground door driver with double balance bars and turbine worm gear transmission, which reduces the cost compared with the double electric support rod drive, and improves the strength of the screw rod compared with the motor-driven self-closing cable pulling the ground door movement. The vertically arranged ground door driver saves the gap in the ground door sheet metal cavity, ensures that the function of the ground door remains unchanged, reduces the cost of the ground door driver, and improves reliability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0010] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of another side of the present invention; Figure 3 This is a schematic diagram of the structure of the vehicle chassis, the balance bar, and the ground door driver connected to the present invention; Figure 4 It is a structural diagram of the door driver of the present invention; Among them: 1. chassis, 2. lower bracket of stabilizer bar, 3. stabilizer bar, 4. upper bracket of stabilizer bar, 5. floor door sheet metal, 6. floor door driver, 7. driver bracket, 8. lower hinge of tailgate, 9. motor, 10. worm, 11. driver housing, 12. screw, 13. pin, 14. through-hole ball head, 15. end cover, 16. rotating mechanism, 17 turbine. DETAILED DESCRIPTION

[0011] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art without creative effort based on the embodiments of the present invention are within the scope of protection of the present invention.

[0012] like Figure 1 、 2As shown in Figure 3, the figure includes a vehicle chassis 1 and a ground door sheet metal 5. The edge of the vehicle chassis 1 is connected to two tailgate lower hinges 8 by bolts. The ground door sheet metal 5 is connected to the vehicle chassis 1 through the tailgate lower hinge 8. At the same time, the vehicle chassis 1 and the ground door sheet metal 5 are also connected by balance bars 3 arranged on both sides. A ground door driver 6 is provided in the ground door sheet metal 5. The ground door driver 6 is bolted to the ground door sheet metal 5 through a rotating mechanism 16. The ground door driver 6 is bolted to the vehicle chassis 1 through a driver bracket 7. Compared with the traditional double electric strut design or the motor-driven self-closing cable-pulling sky and earth door system, the double balance bar and worm gear transmission structure reduces costs compared to the double electric strut drive, and improves strength compared to the motor-driven self-closing cable-pulling ground door movement. The vertically arranged ground door driver saves the gap in the ground door sheet metal cavity, ensuring that the ground door function remains unchanged, reducing the cost of the ground door driver and improving reliability.

[0013] One end of the stabilizer bar 3 is connected to the stabilizer bar lower bracket 2 fixed to the edge of the vehicle chassis 1, and the other end is connected to the stabilizer bar upper bracket 4 fixed inside the ground door sheet metal 5. The stabilizer bar lower bracket 2 is connected to the vehicle chassis 1 by bolts, and the stabilizer bar upper hinge 4 is connected to the ground door sheet metal 5 by bolts. The stabilizer bar 3 is mainly composed of a gas spring and a ball head. Two stabilizer bars 3 form a double stabilizer bar structure. The ground door drive 6 includes a motor 9, a worm 10, a drive housing 11, a 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 screw 12 through the worm 10 connected inside it, and engages with the turbine 17 connected to the screw 12. After the worm 10 and the turbine 17 are engaged, they are assembled in the drive housing 11 and the end cover 15. The rotating mechanism 16 is bolted to the end cover 15. The screw rod 12, the worm 10, the motor 9, the end, and the turbine 17 are assembled in the drive housing 11 and the end cover 15. The screw rod 12 passes through the turbine 17 and is connected to the internal thread of the turbine 17. The drive bracket 7 and the screw rod 12 are riveted through the through-hole ball head 14 through the pin 13. The drive bracket 7 can rotate around the pin 13. The end cover 15 and the rotating mechanism 16 are connected by bolts. The vertically arranged ground door drive 6 drives the screw rod 12 to telescope through the motor 9, so that the ground door sheet metal 5 rotates around the lower hinge 8 of the tailgate, 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 in the ground door sheet metal 5, saving the cavity gap of the ground door sheet metal 5.

[0014] The ground door driver 6 is arranged vertically in the ground door sheet metal 5. The vertically arranged ground door driver saves the gap in the ground door sheet metal cavity, ensures that the ground door function remains unchanged, reduces the cost of the ground door driver, and improves reliability.

[0015] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A floor door opening and closing device for a car tailgate, comprising a vehicle chassis (1) and a floor door sheet metal (5), characterized in that: The edge of the vehicle chassis (1) is connected to two tailgate lower hinges (8) by bolts, and the ground door sheet metal (5) is connected to the vehicle chassis (1) by the tailgate lower hinge (8). At the same time, the vehicle chassis (1) and the ground door sheet metal (5) are also connected by balance bars (3) arranged on both sides. A ground door driver (6) is provided in the ground door sheet metal (5), and the ground door driver (6) is bolted to the ground door sheet metal (5) through a rotating mechanism (16). The ground door driver (6) is bolted to the vehicle chassis (1) through a driver bracket (7).

2. The vehicle tailgate floor door opening and closing device according to claim 1, characterized in that: One end of the balancing bar (3) is connected to a balancing bar lower bracket (2) fixed to the edge of the vehicle chassis (1), and the other end is connected to a balancing bar upper bracket (4) fixed to the ground door sheet metal (5). The balancing bar lower bracket (2) is connected to the vehicle chassis (1) by bolts, and the balancing bar upper hinge (4) is connected to the ground door sheet metal (5) by bolts.

3. The vehicle tailgate floor door opening and closing device according to claim 1, characterized in that: The ground door driver (6) comprises a motor (9), a worm (10), a driver housing (11), a 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 screw (12) through the worm (10) connected thereto and meshes with the turbine (17) connected to the screw (12). The worm (10) and the turbine (17) are meshed and assembled in the driver housing (11) and the end cover (15). The driver bracket (7) and the screw (12) are riveted together through the through-hole ball head (14) and the pin (13). The rotating mechanism (16) is bolted to the end cover (15).

4. The vehicle tailgate floor door opening and closing device according to claim 1, characterized in that: The floor door driver (6) is arranged vertically inside the floor door sheet metal (5).

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