Car door limiting mechanism

Abstract

The invention discloses a car door limiting mechanism which comprises a telescopic mechanism and a limiting mechanism, the telescopic mechanism comprises a telescopic mechanism support, a gear motor, a sliding block pin and a connecting assembly, the gear motor is fixed to the telescopic mechanism support, the sliding block pin is movably installed on the telescopic mechanism support, and the connecting assembly is connected with the sliding block pin. An output shaft of the gear motor is connected with one end of the sliding block pin through the connecting assembly, the sliding block pin is provided with a first working position and a second working position, and the gear motor is used for driving the sliding block pin to move between the first working position and the second working position through the connecting assembly. When the sliding block pin is located at the first working position, the sliding block pin is connected with the limiting mechanism in an inserted mode, and when the sliding block pin is located at the second working position, the sliding block pin is separated from the limiting mechanism. The sealing device can effectively solve the problems of vehicle door shaking and abnormal sound generated by road excitation and sealing caused by vehicle door shaking in the vehicle running process.

Description

Technical Field

[0001] The present invention relates to a limiting mechanism, in particular to a door limiting mechanism for a vehicle door. Background Art

[0002] Currently, the competition pressure in the automotive industry is increasing. Traditional rotary vehicle doors can no longer meet the needs of all customers, and vehicle doors are gradually transforming into various forms. There are more and more sliding doors and scissor doors in the market. However, in the closed state of such vehicle doors, the doors are basically fixed by only two constraint points, resulting in insufficient constraint stiffness, and it is easy to generate bumping noises during vehicle driving.

[0003] As Figure 8 shown, in the closed state of the sliding door, the door is only constrained by two front and rear locks (the positions marked by triangles in the figure). Theoretically, the sliding door can rotate along the straight line formed by the two locks, with insufficient constraint stiffness.

[0004] The scissor door is only constrained by a rotation center of the hinge and the door lock. Theoretically, the scissor door can also rotate along the straight line formed by these two points, with insufficient constraint stiffness.

[0005] In addition, due to insufficient constraint stiffness of such vehicle doors, the sealing strip can push out a part of the door in the closed state of the door. The door rotates along the straight line of the two constraint points, resulting in a large local surface difference of the door, affecting the aesthetic effect and also causing sealing defects of the whole vehicle.

[0006] Currently, there is no effective solution to solve such problems. Usually, during the stamping or assembly process of the vehicle door, the upper and lower positions of the vehicle door are pre-bent and deformed inward. After the vehicle door is closed, the sealing force can just push the vehicle door to the designed position. The closed position of the vehicle door is constrained by the compression force of the sealing strip and the constraint points of the door lock and the hinge. Such a solution can effectively solve the vehicle door surface difference problem in the static state of the whole vehicle. However, during the driving process of the whole vehicle, road excitations will still cause the vehicle door to shake, affecting the sealing and NVH performance of the whole vehicle. Summary of the Invention

[0007] The object of the present invention is to provide a door limiting mechanism to solve the technical problems in the prior art.

[0008] The present invention provides a door limiting mechanism, which includes a telescopic mechanism and a limiting mechanism. The telescopic mechanism includes a telescopic mechanism bracket, a reduction motor, a slider pin and a connecting component. The reduction motor is fixed on the telescopic mechanism bracket. The slider pin is movably installed on the telescopic mechanism bracket. The output shaft of the reduction motor is connected to one end of the slider pin through the connecting component. The slider pin has a first working position and a second working position. The reduction motor is used to drive the slider pin to move between the first working position and the second working position through the connecting component. When in the first working position, the slider pin is inserted and connected to the limiting mechanism. When in the second working position, the slider pin is separated from the limiting mechanism.

[0009] In the aforementioned door limiting mechanism, preferably, a guide rail is fixedly provided on the telescopic mechanism bracket. The slider pin is composed of a slider part and a pin rod part. The slider part is installed on the guide rail and can slide on the guide rail. One end of the pin rod part is fixedly connected to the slider part, and the other end of the pin rod part is processed with an inclined chamfer.

[0010] In the aforementioned door limiting mechanism, preferably, the connecting component includes an output shaft swing arm and a swing arm connecting rod. One end of the output shaft swing arm is fixedly installed on the output shaft of the reduction motor. The other end of the output shaft swing arm is connected to one end of the swing arm connecting rod through a first swing arm connecting rod bolt. The other end of the swing arm connecting rod is connected to the end of the slider part away from the pin rod part through a second swing arm connecting rod bolt.

[0011] In the aforementioned door limiting mechanism, preferably, swing arm bushings are provided in the mounting holes at both ends of the swing arm connecting rod.

[0012] In the aforementioned door limiting mechanism, preferably, the limiting mechanism includes a limiting mechanism bracket and a limiting mechanism riveting shaft. The limiting mechanism bracket is a "U" - shaped bracket. The opening of the limiting bracket faces the telescopic mechanism. Two of the limiting mechanism riveting shafts are installed between two parallel side walls of the limiting bracket. The two limiting mechanism riveting shafts are arranged in parallel and there is a gap between them.

[0013] In the aforementioned door limiting mechanism, preferably, limiting mechanism wear - resistant bushings are sleeved on both of the limiting mechanism riveting shafts.

[0014] Compared with the prior art, the present invention includes a telescopic mechanism and a limiting mechanism. When the door is closed, the slider pin on the telescopic mechanism extends under the drive of the reduction motor, and the end of the slider pin is inserted and cooperated with the limiting mechanism, thereby limiting the door, effectively solving the problems of door shaking, abnormal noise generated due to road excitation during vehicle driving, and sealing problems caused by door shaking. Description of the Drawings

[0015] Figure 1 is the isometric view of the present invention in the unlocked state;

[0016] Figure 2 is the isometric view of the present invention in the locked state;

[0017] Figure 3 is the exploded view of the present invention;

[0018] Figure 4 is the exploded view of the limiting mechanism of the present invention;

[0019] Figure 5 is the reference of the usage state of the present invention Figure 1 ;

[0020] Figure 6 is the reference of the usage state of the present invention Figure 2 ;

[0021] Figure 7 is the reference of the usage state of the present invention Figure 3 ;

[0022] Figure 8 is the schematic diagram of the sliding door in the prior art.

[0023] Explanation of reference numerals: telescopic mechanism bracket 1, reduction motor 2, slider pin 3, slider part 31, pin rod part 32, chamfer 33, guide rail 4, output shaft swing arm 5, swing arm connecting rod 6, first swing arm connecting rod bolt 7, second swing arm connecting rod bolt 8, swing arm bushing 9, limiting mechanism bracket 10, limiting mechanism riveting shaft 11, limiting mechanism wear-resistant bushing 12, body sheet metal 13, door sheet metal 14, avoidance hole 15, reduction motor fixing screw 16, output shaft avoidance hole 17, counterbore 18, first threaded hole 19, guide rail fixing screw 20, output shaft mounting hole 21, second threaded hole 22, screw 23, third threaded hole 24, fourth threaded hole 25. Detailed Description of the Invention

[0024] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0025] Embodiments of the present invention: As Figures 1 - 4As shown in the figure, a door position-limiting mechanism includes a telescopic mechanism and a position-limiting mechanism. The telescopic mechanism includes a telescopic mechanism bracket 1, a reduction motor 2, a slider pin 3, and a connection assembly. The reduction motor 2 is fixed on the telescopic mechanism bracket 1. The slider pin 3 is movably installed on the telescopic mechanism bracket 1. The output shaft of the reduction motor 2 is connected to one end of the slider pin 3 through the connection assembly. The slider pin 3 has a first working position and a second working position. The reduction motor 2 is used to drive the slider pin 3 to move between the first working position and the second working position through the connection assembly. When the slider pin 3 is in the first working position, it is inserted and connected to the position-limiting mechanism. When the slider pin 3 is in the second working position, it is separated from the position-limiting mechanism.

[0026] The telescopic mechanism is fixed on the vehicle body sheet metal 13, and the position-limiting mechanism is fixed on the door sheet metal 14. When the door is closed, the reduction motor 2 drives the slider pin 3 to move to the first working position through the connection assembly. At this time, the position-limiting of the position-limiting mechanism can be realized, so that the position of the door is restricted, effectively solving the problems of door shaking, abnormal noise generated by road excitation during vehicle driving, and sealing problems caused by door shaking.

[0027] When the door needs to be opened, the reduction motor 2 drives the slider pin 3 to move to the second working position through the connection assembly. At this time, the slider pin 3 is separated from the position-limiting mechanism, and the door can be opened after being unlocked.

[0028] Specifically, the telescopic mechanism bracket 1 is fixed on the vehicle body sheet metal 13 by four bolts or four rivets. It should be noted that for aesthetics, the telescopic mechanism is fixed inside the vehicle body. Therefore, an avoidance hole 15 for the slider pin 3 to pass through is opened on the vehicle body sheet metal 13.

[0029] Furthermore, a guide rail 4 is fixed on the telescopic mechanism bracket 1. The guide rail 4, the slider pin 3, and the connection assembly are arranged on the same side of the telescopic mechanism bracket 1, while the reduction motor 2 is arranged on the other side of the telescopic mechanism bracket 1. The reduction motor 2 is composed of a motor and a reduction gearbox. The reduction motor 2 is an existing product and can be directly purchased. In this embodiment, the reduction motor 2 is electrically connected to the vehicle's ECU, and its working state is controlled by the ECU. The reduction motor 2 is fixed on the telescopic mechanism bracket 1 by four reduction motor fixing screws 16. An output shaft avoidance hole 17 for the output shaft of the reduction motor 2 to pass through is opened on the telescopic mechanism bracket 1. The output shaft of the reduction motor 2 passes through the output shaft avoidance hole 17 and is connected to the connection assembly located on the other side of the telescopic mechanism bracket 1.

[0030] Two counterbore holes 18 are opened on the guide rail 4. Correspondingly, two first threaded holes 19 for installing the guide rail 4 are opened on the telescopic mechanism bracket 1. Two guide rail fixing screws 20 are used to pass through the two counterbore holes 18 on the guide rail 4, and then connected to the two first threaded holes 19 to fix the guide rail 4 on the telescopic mechanism bracket 1.

[0031] Further, the slider pin 3 is composed of a slider part 31 and a pin rod part 32. The slider part 31 is installed on the guide rail 4 and can slide on the guide rail 4. One end of the pin rod part 32 is fixedly connected to the slider part 31, and the other end of the pin rod part 32 is processed with an inclined chamfer 33.

[0032] It should be noted that after the slider part 31 is installed on the guide rail 4, it can only move along the length direction of the guide rail 4. It is restricted by the guide rail 4 in other directions and will not generate displacement. Moreover, the slider part 31 can only be separated from the guide rail 4 at both ends of the guide rail 4, and the slider part 31 will not detach from the guide rail 4 during normal operation.

[0033] Further, the connecting component includes an output shaft swing arm 5 and a swing arm connecting rod 6. An output shaft mounting hole 21 is provided at one end of the output shaft swing arm 5. The output shaft of the reduction motor 2 passes through the output shaft avoidance hole 17 and is inserted and connected to the output shaft mounting hole 21 on the output shaft swing arm 5. A second threaded hole 22 perpendicular to the output shaft mounting hole 21 is also provided on the output shaft swing arm 5. A screw 23 is threadedly connected to the second threaded hole 22. After the screw 23 abuts against the side wall of the output shaft of the reduction motor 2, the output shaft swing arm 5 will not detach from the output shaft of the reduction motor 2.

[0034] A third threaded hole 24 is provided at the other end of the output shaft swing arm 5. Mounting holes are provided at both ends of the swing arm connecting rod 6. Swing arm bushings 9 are provided in both of these mounting holes. A first swing arm connecting rod bolt 7 passes through the swing arm bushing 9 at one end of the swing arm connecting rod 6 and is threadedly connected to the third threaded hole 24. A fourth threaded hole 25 is provided at the end of the slider part 31 away from the pin rod part 32. A second swing arm connecting rod bolt 8 passes through the swing arm bushing 9 at the other end of the swing arm connecting rod 6 and is threadedly connected to the fourth threaded hole 25.

[0035] Through the setting of the swing arm bushings 9, the rotation smoothness of the connection parts between the swing arm connecting rod 6 and the output shaft swing arm 5 and the slider part 31 can be improved, and the service life of the first swing arm connecting rod bolt 7 and the second swing arm connecting rod bolt 8 can also be increased.

[0036] Further, the limiting mechanism includes a limiting mechanism bracket 10 and a limiting mechanism riveting shaft 11. The limiting mechanism bracket 10 is a "U"-shaped bracket. The opening of the limiting bracket 10 faces the telescopic mechanism. Two limiting mechanism riveting shafts 11 are installed between two parallel side walls of the limiting bracket 10. The two limiting mechanism riveting shafts 11 are arranged in parallel and there is a gap between them.

[0037] Preferably in this embodiment, limiting mechanism wear-resistant bushings 12 are sleeved on both of the two limiting mechanism riveting shafts 11. The distance between the two limiting mechanism wear-resistant bushings 12 is equal to the thickness of the pin rod part 32.

[0038] A wear-resistant bushing 12 of the limiting mechanism is sleeved on the riveting shaft 11 of the limiting mechanism, which can protect the riveting shaft 11 of the limiting mechanism and extend the service life of the riveting shaft 11 of the limiting mechanism.

[0039] The working principle of the present invention: After the vehicle door is closed, the vehicle ECU receives a door closed signal (or other trigger signals), and the vehicle ECU sends a working instruction to the reduction motor 2. The reduction motor 2 starts to operate, causing the output shaft swing arm 5 to rotate 180°. The output shaft swing arm 5 pushes the slider pin 3 to move linearly on the guide rail 4 through the swing arm connecting rod 6. The slider pin 3 is inserted between the two wear-resistant bushings 12 of the limiting mechanism to reach the limiting and locking state. At this time, the slider pin 3 is located at the first working position. The state at this time can be referred to Figure 2 and Figure 5 .

[0040] In the locked state, the limiting system can effectively limit the Y-direction shaking problem of the local part of the vehicle door, and can solve problems such as sealing and abnormal noise caused by the local shaking of the vehicle door.

[0041] When the vehicle door needs to be opened, after the vehicle ECU receives the vehicle door opening signal, it sends a working instruction to the reduction motor 2. The reduction motor 2 starts to operate, causing the output shaft swing arm 5 to rotate 180°. The output shaft swing arm 5 pulls the slider pin 3 to move linearly on the guide rail 4 through the swing arm connecting rod 6. The slider pin 3 is separated from the two wear-resistant bushings 12 of the limiting mechanism and retracts into the body sheet metal 13. At this time, the slider pin 3 is located at the second working position. The state at this time can be referred to Figure 1 and Figure 6 .

[0042] The setting of the present invention can also play a role in eliminating the surface difference. When there is a surface difference between the outer panel of the vehicle door and the body (such as Figure 7 the state shown), the inclined chamfer 33 at the end of the pin rod part 32 can play a guiding role to guide the vehicle door to the theoretical position and eliminate the appearance surface difference.

[0043] The present invention can be widely applied to various types of vehicle doors, and can be applied to positions where the local restraint of the vehicle door is insufficient, not limited to sliding doors, scissor doors, etc.

[0044] The structure, features and effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above is only the preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the present invention, or modified into equivalent embodiments with equivalent changes, still within the spirit covered by the description and drawings, shall be within the protection scope of the present invention.

Claims

1. A door limiting mechanism, comprising a telescopic mechanism and a limiting mechanism, characterized in that: The telescopic mechanism includes a telescopic mechanism bracket (1), a reduction motor (2), a slider pin (3) and a connection assembly. The reduction motor (2) is fixed on the telescopic mechanism bracket (1). The slider pin (3) is movably installed on the telescopic mechanism bracket (1). The output shaft of the reduction motor (2) is connected to one end of the slider pin (3) through the connection assembly. The slider pin (3) has a first working position and a second working position. The reduction motor (2) is used to drive the slider pin (3) to move between the first working position and the second working position through the connection assembly. When in the first working position, the slider pin (3) is inserted and connected to the limiting mechanism. When in the second working position, the slider pin (3) is separated from the limiting mechanism.

2. The door limit mechanism according to claim 1, wherein: A guide rail (4) is fixedly arranged on the telescopic mechanism bracket (1). The slider pin (3) is composed of a slider part (31) and a pin rod part (32). The slider part (31) is installed on the guide rail (4) and can slide on the guide rail (4). One end of the pin rod part (32) is fixedly connected to the slider part (31). The other end of the pin rod part (32) is processed with an inclined chamfer (33).

3. The door limiting mechanism according to claim 2, wherein: The connection assembly includes an output shaft swing arm (5) and a swing arm connecting rod (6). One end of the output shaft swing arm (5) is fixedly installed on the output shaft of the reduction motor (2). The other end of the output shaft swing arm (5) is connected to one end of the swing arm connecting rod (6) through a first swing arm connecting rod bolt (7). The other end of the swing arm connecting rod (6) is connected to the end of the slider part (31) away from the pin rod part (32) through a second swing arm connecting rod bolt (8).

4. The door limiting mechanism according to claim 3, characterized in that: Swing arm bushings (9) are arranged in the mounting holes at both ends of the swing arm connecting rod (6).

5. The door limit mechanism according to claim 1, characterized in that: The limiting mechanism includes a limiting mechanism bracket (10) and a limiting mechanism riveting shaft (11). The limiting mechanism bracket (10) is a "U"-shaped bracket. The opening of the limiting bracket (10) faces the telescopic mechanism. Two limiting mechanism riveting shafts (11) are installed between two parallel side walls of the limiting bracket (10). The two limiting mechanism riveting shafts (11) are arranged in parallel and there is a gap between them.

6. The door limiting mechanism according to claim 5, wherein: Limiting mechanism wear-resistant bushings (12) are sleeved on both of the two limiting mechanism riveting shafts (11).

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