A mechanical automatic U-turn device for automobiles

Abstract

The present invention relates to a mechanical type automatic U-turn device for automobiles, comprising a ground (1), a first circular guide rail (7) mounted on the ground (1), and a U-turn turntable (5). A pressing pedal (4) mounted on the U-turn turntable can press down a collar (10) connected to a rotating shaft (13) through threaded engagement, thereby pushing the U-turn turntable (5) to rotate through a vertical guide rail (6); at the same time, the U-turn turntable (5) is provided with self-locking mechanisms (1) and (2) to ensure that the U-turn turntable (5) will not be reset immediately after being rotated into position. Correspondingly, unlocking mechanisms (8) and (9) are provided on the ground (1). When the automobile leaves the turntable, the unlocking mechanisms are triggered, and the mechanisms are reset under the action of a reset spring (12). The present invention does not use any other external energy except the automobile's own gravity, has a simple structure, and except for the pressing pedal, the U-turn turntable does not change in height during rotation, does not cause discomfort to the user, and is basically applicable to all existing automobiles.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile auxiliary U-turn devices, in particular to a mechanical automatic U-turn device. Background Art

[0002] With the continuous acceleration of urbanization, the number of private cars has continued to rise. In recent years, accidents caused by the difficulty of turning vehicles in narrow spaces have become frequent. This not only causes a lot of trouble for car owners, but also poses many safety hazards. For example, it can block fire lanes and prevent vehicles from being moved out of the way in time. Therefore, how to quickly and conveniently turn vehicles in narrow spaces has become an urgent problem that needs to be solved.

[0003] CN206299184U discloses a "car U-turn turntable," and CN204415358U discloses a "self-service car U-turn device." While both patents enable automatic car U-turns, they both suffer from the problem of variable turntable height. Furthermore, CN206299184U uses an electric self-locking and unlocking device, while the turntable surface in CN204415358U is even inclined, significantly impacting the user experience. CN109849870A discloses a "fixed car U-turn platform." Although its turntable height remains constant, it is only suitable for front-wheel drive vehicles, limiting its scope of application. Summary of the Invention

[0004] The problem solved by the present invention is to use a mechanical structure to complete the automatic U-turn of a car. At the same time, the U-turn turntable will not change in height and will always be level with the ground. In addition, the device can automatically reset after the car leaves, and the device is applicable to all cars.

[0005] To achieve the above objectives, the present invention adopts a solution: a mechanical automatic U-turn device for automobiles, comprising a base, a self-locking block, a self-locking spring, a push-down pedal, a U-turn turntable, a vertical guide rail, a first circular guide rail, an unlocking block, an unlocking pressure plate, a collar, a second circular guide rail, a return spring, a rotating shaft, an external thread, an internal thread, and a limit block. The base is equipped with the first circular guide rail, and a self-locking hole is formed in the side wall of the base, and a limit block is formed on the other side of the side wall. The self-locking hole contains an unlocking pressure plate and an unlocking block for unlocking the U-turn turntable. The unlocking pressure plate and the unlocking block cooperate via an inclined surface to unlock the turntable.

[0006] A U-turn disc is mounted on the first circular guide rail. A hole is formed in the sidewall of the U-turn disc, and a self-locking spring and a self-locking block are located within the hole to lock the disc after a U-turn. The U-turn disc is also provided with a downward pressure pedal and a vertical guide rail. The downward pressure pedal can move vertically relative to the U-turn disc, and the vertical guide rail is fixedly connected to the U-turn disc.

[0007] The lower end of the push-down pedal has a collar, along which the pedal can slide. The collar is mounted on a vertical guide rail and can move up and down along the rail. A rotating shaft is mounted in the center of the collar. The collar's center hole has an internal thread, and the rotating shaft has an external thread. The collar and the rotating shaft mate through the internal and external threads, allowing the collar to rotate and move up and down along the rotating shaft. A second circular guide rail is mounted at the lower end of the collar, and a return spring is mounted at the lower end of the second circular guide rail to reset the device. The return spring is mounted on the outside of the rotating shaft and can be stretched and compressed along the rotating shaft. The return spring and the rotating shaft are both firmly connected to the ground.

[0008] When in use, after the car drives onto the U-turn disc, the front wheel presses down on the depression pedal, which in turn presses down on the collar. The collar engages the shaft through internal and external threads, and under the action of the depression pedal, it rotates and descends along the shaft. Simultaneously, the collar pushes the U-turn disc to rotate as it descends via the vertical guide rail. Simultaneously, a return spring located on the underside of the collar stores energy.

[0009] When the turntable rotates 180 degrees, the self-locking block inside the turntable, driven by the self-locking spring, extends into the self-locking hole in the ground wall, causing the turntable to self-lock. After the vehicle exits the turntable, the rear wheels press down on the unlocking pressure plate, which, via its inclined surface, pushes the unlocking block out of the self-locking hole, completing the unlocking process. The return spring pushes the collar upward while rotating, driving the turntable in the opposite direction to complete the reset.

[0010] When the car drives away, although the front wheel will unlock the unlocking mechanism, the force of the return spring is small and still not enough to push the ring, so the turntable will not reset. Only when the car drives away completely will the return spring push the ring to reset the device.

[0011] The beneficial effect of the present invention is that the present invention can complete the U-turn by using only the gravitational potential energy of the car without any additional energy.

[0012] The U-turn turntable of the present invention does not change in any direction of height, but it will drop slightly when the pedal is pressed down, which greatly improves the comfort of use.

[0013] The device of the present invention will automatically reset after the car drives away.

[0014] The present invention is applicable to cars of various sizes and has a wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a planar structural diagram of the present invention.

[0016] Figure 2 It is a top view of the present invention.

[0017] Figure 3 It is a schematic diagram of the self-locking state of the present invention.

[0018] Figure 4This is a schematic diagram of the unlocking state of the present invention.

[0019] In the figure, 1-earth, 2-self-locking block, 3-self-locking spring, 4-pressing pedal, 5-U-turn turntable, 6-vertical guide rail, 7-first circular guide rail, 8-unlocking block, 9-unlocking pressure plate, 10-collar, 11-second circular guide rail, 12-return spring, 13-rotating shaft, 14-external thread, 15-internal thread, 16-limit block. DETAILED DESCRIPTION

[0020] like Figure 1 and Figure 2 As shown, a mechanical automatic U-turn device for a car includes a ground 1, a self-locking block 2, a self-locking spring 3, a pressing pedal 4, a U-turn turntable 5, a vertical guide rail 6, a first circular guide rail 7, an unlocking block 8, an unlocking pressure plate 9, a collar 10, a second circular guide rail 11, a return spring 12, a rotating shaft 13, an external thread 14, an internal thread 15, and a limit block 16; the first circular guide rail 7 is installed on the ground 1, a self-locking hole is opened on one side of the side wall of the ground, and a limit block 16 is installed on the other side, and the limit block 16 is fixedly connected to the ground; an unlocking pressure plate 9 and an unlocking block 8 for unlocking the U-turn turntable 5 are arranged in the self-locking hole, for unlocking the U-turn turntable 5; the unlocking pressure plate 9 and the unlocking block 8 are matched with the unlocking block 8 through an inclined surface, the unlocking pressure plate 9 can only move up and down, and the unlocking block 8 can only move left and right in the self-locking hole. When the unlocking pressure plate 9 descends, the unlocking block 8 is pushed to move left, and when the unlocking block 8 moves right, the unlocking pressure plate 9 is pushed up.

[0021] A turntable 5 is mounted on the first circular guide rail 7, allowing it to rotate relative to the ground. A hole is formed in the sidewall of the turntable 5, housing a self-locking spring 3 and a self-locking block 2 for locking the turntable 5 after a U-turn. The self-locking spring 3 is a compression spring that constantly pushes the self-locking block 2 outward; the self-locking block 2 can slide along the sidewall of the ground 1. The turntable 5 is also equipped with a push-down pedal 4 and a vertical guide rail 6. The push-down pedal 4 can move vertically relative to the turntable 5, but rotates together with it. The vertical guide rail 6 is fixedly connected to the turntable 5, rotating together without relative motion.

[0022] The lower end of the push-down pedal 4 is provided with a collar 10. The push-down pedal 4 can slide along the surface of the collar 10, but the two move together in the vertical direction. The collar 10 is mounted on the vertical guide rail 6 and can move up and down along the vertical guide rail 6, but the two rotate together. A rotating shaft 13 is installed in the middle of the collar 10. The center hole of the collar 10 has an internal thread 15, and the rotating shaft 13 has an external thread 14. The collar 10 and the rotating shaft 13 cooperate through the internal and external threads, and the collar 10 can rotate along the rotating shaft 13 and move up and down. The lower end of the collar 10 is provided with a second circular guide rail 11, and the lower end of the second circular guide rail 11 is provided with a return spring 12 for resetting the device. The return spring 12 is sleeved on the outside of the rotating shaft 13 and can be stretched and compressed along the rotating shaft 13. At the same time, the return spring 12 can rotate relative to the collar 10 through the second circular guide rail 11. The return spring 12 and the rotating shaft 13 are both fixed to the ground.

[0023] In the initial state, the pressing pedal 4, the self-locking block 2 and the self-locking spring 3 are located on the left side of the figure, the unlocking pressure plate 9 is pressed down, and the unlocking block 8 is pushed to the extreme left end.

[0024] During use, after the vehicle drives onto the U-turn disk 5, the front wheels depress the depression pedal 4, which moves downward relative to the U-turn disk 5 and depresses the collar 10. Collar 10 engages the rotating shaft via internal and external threads. Driven by the depression pedal 4, it descends along the rotating shaft 13 while rotating. Simultaneously, collar 10 pushes the U-turn disk 5 to rotate as it descends, driven by the vertical guide rail 6. The return spring 12 located below collar 10 is compressed and stores energy as it descends. Since collar 10 and return spring 12 are connected via a second circular guide rail 11, return spring 12 is only compressed and does not rotate.

[0025] like Figure 3 As shown, when the U-turn turntable 5 rotates to 180 degrees, the self-locking block 2 in the U-turn turntable 5 extends into the self-locking hole of the side wall of the ground under the action of the self-locking spring 3, causing the U-turn turntable 5 to self-lock and push the unlocking block 8 to move right, thereby pushing the unlocking pressure plate 9 to move upward.

[0026] like Figure 4 As shown, after the vehicle exits the turntable, the rear wheels press down on the unlocking plate 9, which descends and, via the inclined surface, pushes the unlocking block 8 to the left, pushing the self-locking block 2 out of the self-locking hole, completing the unlocking process. Once unlocked, the return spring 12 pushes the collar 10 upward along the rotating shaft 13, rotating it in the opposite direction via the vertical guide rail 6, completing the reset. When the turntable returns to its original position and rotates 180 degrees, the limit stop 16 contacts the self-locking block 2, preventing further rotation of the turntable. This ensures accurate reset and a stable vehicle on the turntable.

[0027] When the car drives out of the turntable, the front wheels first press down the unlocking pressure plate 9 to unlock the device. However, the rear wheels of the car are still on the turntable at this time, and the force of the return spring 12 is still less than the weight of the car on the turntable 5 at this time, so the device cannot be reset. The device will only reset when the car completely drives away.

[0028] The width of the unlocking pressure plate 9 is much wider than the width of the pressing pedal 4, so as to prolong the contact time between the rear wheel of the car and the unlocking pressure plate 9, and ensure that the device has enough time to unlock after the car drives out.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments and that various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A mechanical automatic U-turn device for automobiles, characterized by: The invention comprises a ground (1), a self-locking block (2), a self-locking spring (3), a pressing pedal (4), a U-turn turntable (5), a vertical guide rail (6), a first circular guide rail (7), an unlocking block (8), an unlocking pressure plate (9), a collar (10), a second circular guide rail (11), a return spring (12), a rotating shaft (13), an external thread (14), an internal thread (15), and a limit block (16); the ground (1) is provided with a first circular guide rail (7), the ground side A self-locking hole is provided on one side of the wall, and a limit stopper (16) is provided on the other side; an unlocking pressure plate (9) and an unlocking block (8) for unlocking the U-turn turntable (5) are provided in the self-locking hole; the unlocking pressure plate (9) and the unlocking block (8) cooperate with each other through an inclined surface, the unlocking pressure plate (9) can only move up and down, and the unlocking block (8) can only move left and right in the self-locking hole; when the unlocking pressure plate (9) descends, the unlocking block (8) is pushed to move left, and when the unlocking block (8) moves right, the unlocking pressure plate (9) is pushed to move up; A U-turn disc (5) is mounted on the first circular guide rail (7), and the U-turn disc (5) can rotate relative to the ground through the first circular guide rail (7). A hole is opened on the side wall of the U-turn disc (5), and a self-locking spring (3) and a self-locking block (2) are arranged in the side wall hole; the self-locking spring (3) is a compression spring, which always pushes the self-locking block (2) outward; the self-locking block (2) can slide along the side wall of the ground (1); a downward pressure pedal (4) and a vertical guide rail (6) are also provided on the U-turn disc (5), and the downward pressure pedal (4) can move vertically relative to the U-turn disc (5), but rotate together; the vertical guide rail (6) is fixedly connected to the U-turn disc (5), and the two rotate together without relative movement; a collar (10) is provided at the lower end of the downward pressure pedal (4), and the downward pressure pedal (4) can slide along the surface of the collar (10), but the two move together in the vertical direction; the collar (10) is installed on the vertical guide rail (6) and can move up and down along the vertical guide rail (6), but the two rotate together; a rotating shaft (13) is installed in the middle of the collar (10), the center hole of the collar (10) has an internal thread (15), and the rotating shaft (13) has an external thread (14). The collar (10) and the rotating shaft (13) are matched through internal and external threads, and the collar (10) can rotate along the rotating shaft (13) and move up and down; a second circular guide rail (11) is installed at the lower end of the collar (10), and a return spring (12) is installed at the lower end of the second circular guide rail (11); the return spring (12) is sleeved on the outside of the rotating shaft (13) and can be stretched and compressed along the rotating shaft (13), and at the same time, the return spring (12) and the collar (10) can rotate relative to each other through the second circular guide rail (11); the return spring (12) and the rotating shaft (13) are both fixed to the ground (1).

2. The mechanical automatic U-turn device for automobiles according to claim 1, characterized in that: The limit block (16) can limit the rotation of the U-turn turntable, thereby preventing the reset turntable from continuing to rotate after being reset.

3. The mechanical automatic U-turn device for automobiles according to claim 1, characterized in that: After the device completes the U-turn, the self-locking block (2) will extend into the self-locking hole under the action of the self-locking spring (3).

4. The mechanical automatic U-turn device for automobiles according to claim 1, characterized in that: After the unlocking pressure plate (9) descends, it can push the unlocking block (8) through the inclined surface to push the self-locking block (2) out of the self-locking hole.

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