Downward opening type tail door driving system of automobile

Abstract

The utility model discloses an automobile downward opening type tail door driving system which comprises an automobile body, a ground door, a hinge support and a driving device, one side of the hinge support is connected with the ground door, the other side of the hinge support is connected with the automobile body, and the driving device comprises a driving unit, a lead screw assembly and a telescopic rod assembly. One end of the telescopic rod assembly is hinged to the hinge support. One end of the driving unit is hinged to the ground door, the driving unit drives the lead screw assembly to rotate, the lead screw assembly drives the telescopic rod assembly to do linear motion, and therefore the ground door rotates relative to the vehicle body. The automobile downward opening type tail door driving system is simple in structure, small in energy loss in the transmission process and low in maintenance difficulty.

Description

Technical Field

[0001] The utility model relates to the field of automobile doors, in particular to a driving system for an automobile bottom-opening tailgate. Background Art

[0002] For large SUVs or MVP models with larger tailgates, using a sky door can reduce the weight and opening radius of the tailgate, and can be opened and closed normally in a narrow space. A sky door is a special tailgate. Compared with ordinary car tailgates, the sky door is divided into two parts, the upper and lower doors, and they can be opened and closed independently.

[0003] Nowadays, with the development of science and technology, the functions of car tailgates are becoming more and more diversified, and users' demand for the use of car trunks has also increased a lot. The traditional manual opening and closing method can no longer meet the needs of users.

[0004] Existing electric drive systems for floor doors all use a motion transmission mechanism between the drive device and the door. The linear motion of the drive device drives the motion transmission mechanism, which in turn drives the connecting rod to move, thereby realizing the opening and closing of the floor door. However, the motion structure is complex and has many parts, which not only has high manufacturing costs and large mechanical transmission efficiency losses, but also has a high risk of damage, resulting in high maintenance costs. Utility Model Content

[0005] The utility model aims to provide a driving system for a lower opening tailgate of an automobile, which has a simple structure, small energy loss in the transmission process and low maintenance difficulty.

[0006] To achieve the above-mentioned purpose, the utility model provides a car bottom-opening tailgate drive system, comprising a car body, a ground door, a hinge bracket and a drive device;

[0007] One side of the hinge bracket is connected to the ground door, and the other side is connected to the vehicle body;

[0008] The driving device comprises a driving unit, a screw rod assembly and a telescopic rod assembly; wherein one end of the telescopic rod assembly is hinged on a hinge bracket; and one end of the driving unit is hinged on a ground door.

[0009] The driving unit drives the screw rod assembly to rotate, and the screw rod assembly drives the telescopic rod assembly to move linearly, thereby realizing the rotational movement of the ground door relative to the vehicle body.

[0010] As a further improvement of the present invention, the drive unit includes a motor, a worm and a worm wheel which are linked in sequence, the screw assembly includes a screw and a bearing, and the telescopic rod assembly includes a catheter; the screw and the worm wheel are coaxially fixedly connected, and the screw and the catheter thread cooperate; one end of the screw is connected to the drive unit through the worm wheel.

[0011] As a further improvement of the present invention, the end of the driving unit and the ground door, and the end of the conduit and the hinge bracket are both hinged via a ball and socket.

[0012] As a further improvement of the utility model, the ball socket includes a first ball socket and a second ball socket, the first ball socket is connected between the end of the conduit and the hinge bracket, and the second ball socket is connected between the end of the drive unit and the ground door; the second ball socket is connected to the mounting bracket on the ground door.

[0013] As a further improvement of the present invention, the hinge bracket includes a mounting seat and a rotating seat rotatably connected by a pin, the mounting seat is installed on the vehicle body, and the rotating seat is installed on the ground door; the first ball socket is connected to the mounting seat of the hinge bracket.

[0014] As a further improvement of the present invention, the driving device is located in the cavity structure of the ground door.

[0015] Beneficial Effects

[0016] Compared with the prior art, the advantages of the automobile lower opening tailgate drive system of the utility model are:

[0017] 1. The automobile lower opening tailgate drive system of this scheme can realize the electric opening and closing of the ground door of the automobile top and bottom doors. The automobile lower opening tailgate drive system is directly connected to the vehicle door through a drive device, thereby directly driving the ground door. It not only has a simple overall structure, low manufacturing cost, low maintenance difficulty, but also has low energy loss during the transmission process.

[0018] 2. The mounting bracket and the main body of the driving device are located in the cavity structure of the ground door, which can hide the driving device and avoid the problem of reduced space on the vehicle due to the external placement of the driving device.

[0019] 3. The driving device includes a motor, a worm, a worm gear, a lead screw and a guide tube, which can realize precise telescopic operation between the lead screw and the guide tube, so that the ground door can be accurately rotated to any angle.

[0020] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1A three-dimensional diagram of a vehicle's lower-opening tailgate drive system in a closed state of the ground door;

[0023] Figure 2 is an enlarged view of the driving device and the hinge bracket;

[0024] Figure 3 A three-dimensional diagram of the open state of the ground door of the automobile bottom-opening tailgate drive system;

[0025] Figure 4 A three-dimensional diagram of the opening process of the ground door of the automobile bottom-opening tailgate drive system;

[0026] Figure 5 This is the main view of the auxiliary pull rod;

[0027] Figure 6 for Figure 5 AA view;

[0028] Figure 7 is a front view of the hinge bracket;

[0029] Figure 8 This is the front view of the drive unit. DETAILED DESCRIPTION

[0030] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0031] Example

[0032] The specific implementation of the utility model is as follows Figures 1 to 8 As shown, a car bottom-opening tailgate drive system includes a car body, a floor door 3, a hinge bracket 6 and a drive device 5. One side of the hinge bracket 6 is connected to the floor door 3, and the other side is connected to the car body. The drive device 5 includes a drive unit, a screw assembly, and a telescopic rod assembly, wherein both ends of the telescopic rod assembly are hinged to the floor door 3 and the hinge bracket 6, respectively. The drive unit drives the screw assembly to rotate, and the screw assembly drives the telescopic rod assembly to move linearly, thereby realizing the rotational movement of the floor door 3 relative to the car body.

[0033] The driving device 5 is directly connected to the mounting bracket 4 of the floor door 3 and the hinge bracket 6 of the vehicle body through its own ball socket, and no other motion transmission mechanism is arranged in between. The floor door 3 and the vehicle body can be connected through two or more hinge brackets 6, and the driving device 5 only needs to be connected to the mounting seat 12 of one of the hinge brackets 6.

[0034] The drive unit includes a motor 20, a worm 21 and a worm wheel 22 which are linked in sequence, the screw assembly includes a screw 23 and a bearing, and the telescopic rod assembly includes a guide tube 24. The screw 23 and the worm wheel 22 are coaxially fixedly connected, and the screw 23 and the guide tube 24 are threadedly matched. One end of the screw 23 is connected to the drive unit through the worm wheel 22.

[0035] The end of the driving unit and the ground door 3, and the end of the guide tube 24 and the hinge bracket 6 are both hinged via a ball and socket.

[0036] The ball socket includes a first ball socket 10 and a second ball socket 11. The first ball socket 10 is connected between the end of the guide tube 24 and the hinge bracket 6, and the second ball socket 11 is connected between the end of the drive unit and the ground door 3. The second ball socket 11 is connected to the mounting bracket 4 on the ground door 3.

[0037] The hinge bracket 6 includes a mounting seat 12 and a rotating seat 13 which are rotatably connected via a latch 14. The mounting seat 12 is mounted on the vehicle body, and the rotating seat 13 is mounted on the ground door 3. The first ball socket 10 is connected to the mounting seat 12 of the hinge bracket 6.

[0038] The ground door 3 is provided with a cavity structure, and the mounting bracket 4 and the driving device 5 are both located in the cavity structure of the ground door 3. The axis of the latch 14 of the hinge bracket 6 serves as the axis of rotation of the ground door 3. The latch 14 is located outside the cavity structure of the ground door 3, and the axis of the latch 14 is the pivot axis a. Figure 2 shown.

[0039] When working, the power output end of the motor 20 drives the worm 21 to rotate, which can drive the worm wheel 22 and the screw 23 to rotate together, and the screw 23 rotates relative to the guide tube 24, thereby driving the guide tube 24 to perform linear telescopic motion relative to the drive unit and the screw assembly, thereby driving the ground door 3 to complete the opening and closing action. When the ground door 3 reaches the specified position, the driving device 5 stops running and the ground door 3 is stationary. When the telescopic rod assembly of the driving device 5 extends, the ground door 3 is driven to open through the second ball socket 11; when the telescopic rod assembly of the driving device 5 contracts, the ground door 3 is driven to close through the second ball socket 11.

[0040] The automobile lower opening tailgate drive system also includes an auxiliary pull rod 7, one end of which is hinged to the frame of the vehicle body, and the other end is hinged to the ground door 3. There are two auxiliary pull rods 7, which are symmetrically arranged on the left and right sides of the ground door 3. The auxiliary pull rod 7 includes a pull rod inner tube 16 and a pull rod outer tube 17 that are slidably sleeved with each other, and a tension spring sleeve 18 is provided on the pull rod inner tube 16 and the pull rod outer tube 17, and a tension spring 19 is connected between the two tension spring sleeves 18. The auxiliary pull rod 7 also contracts under the action of the tension spring 19 and the driving device 5, and plays an auxiliary role in the electric opening and closing process of the ground door 3.

[0041] A sky door lock buckle 9 is provided at the upper edge of the ground door 3, and the sky door lock buckle 9 cooperates with the sky door lock 2 of the sky door 1 rotatably connected to the vehicle body. When the ground door 3 and the sky door 1 are both closed, the sky door lock buckle 9 and the sky door lock 2 are attracted and locked.

[0042] The left and right edges of the floor door 3 are provided with floor door lock buckles 15, which cooperate with the floor door lock 8 provided on the vehicle body. When the floor door 3 rotates around the hinge bracket 6 to close to the door closing position, the floor door lock buckle 15 on the floor door 3 is buckled into the floor door lock 8 and then electrically closed, and the floor door 3 is closed.

[0043] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A vehicle bottom-opening tailgate drive system, characterized in that: include: A vehicle body, a floor door (3), a hinge bracket (6) and a driving device (5); One side of the hinge bracket (6) is connected to the floor door (3), and the other side is connected to the vehicle body; The driving device (5) comprises a driving unit, a screw rod assembly, and a telescopic rod assembly; wherein one end of the telescopic rod assembly is hinged on a hinge bracket (6); and one end of the driving unit is hinged on a floor door (3); The driving unit drives the screw rod assembly to rotate, and the screw rod assembly drives the telescopic rod assembly to move linearly, thereby realizing the rotational movement of the floor door (3) relative to the vehicle body.

2. The automobile bottom-opening tailgate driving system according to claim 1, characterized in that: The drive unit comprises a motor (20), a worm (21) and a worm wheel (22) which are linked in sequence; the screw assembly comprises a screw (23) and a bearing; and the telescopic rod assembly comprises a guide tube (24); the screw (23) and the worm wheel (22) are coaxially fixedly connected; one end of the screw (23) is connected to the drive unit via the worm wheel (22); and the screw (23) and the guide tube (24) are threadedly matched.

3. The automobile bottom-opening tailgate driving system according to claim 2, characterized in that: The end of the driving unit and the ground door (3), and the end of the guide tube (24) and the hinge bracket (6) are both hinged via a ball socket.

4. The automobile bottom-opening tailgate driving system according to claim 3, characterized in that: The ball socket comprises a first ball socket (10) and a second ball socket (11); the first ball socket (10) is connected between the end of the guide tube (24) and the hinge bracket (6), and the second ball socket (11) is connected between the end of the drive unit and the floor door (3); the second ball socket (11) is connected to a mounting bracket (4) on the floor door (3).

5. The automobile bottom-opening tailgate driving system according to claim 4, characterized in that: The hinge bracket (6) comprises a mounting seat (12) and a rotating seat (13) which are rotatably connected via a latch (14); the mounting seat (12) is mounted on the vehicle body, and the rotating seat (13) is mounted on the ground door (3); the first ball socket (10) is connected to the mounting seat (12) of the hinge bracket (6).

6. The automobile bottom-opening tailgate driving system according to claim 1, characterized in that: The driving device (5) is located in the cavity structure of the ground door (3).

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