Automatic opening and closing mechanism for vehicle door

Abstract

The application discloses a kind of automatic opening and closing mechanism of vehicle door, it includes: movable arm, install between vehicle door and vehicle body, one end of the movable arm is hinged with vehicle body;The end of movable arm away from vehicle body is arranged in the inner side of vehicle door and is slidably matched with vehicle door, and vehicle door is circumferentially limited to movable arm, to drive movable arm to rotate when vehicle door is opened and closed, simultaneously make movable arm relative sliding along its length direction;Power element is fixedly arranged in the inner side of vehicle door and moves synchronously with vehicle door, and the power output end of power element is directly transmission matched with movable arm;Power element exerts tensile force or thrust along the length direction of movable arm when working, and movable arm transmits force to vehicle body, and vehicle door is driven to complete electric opening and closing relative to vehicle body by the reaction force of vehicle body.The application has the effects of simplifying structure, saving installation space and reducing cost.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to an automatic door opening and closing mechanism. Background Technology

[0002] In the field of vehicle design, the most common door installation methods are hinged and suicide doors, especially in the passenger car sector. These doors are directly hinged to the body, resulting in a simple structure, low installation cost, and good adaptability. To enhance the user's riding experience, door limiters are installed between the body and the door to control automatic door closure, further improving the passenger experience.

[0003] For related technology, please refer to Chinese Patent No. CN121620629A, which discloses an automatic door closing device. The automatic door closing device includes: a lead screw, one side of which is hinged to the vehicle body and the other side of which is hinged to the door; an opening / closing operation assembly that enables the lead screw to open and close the door; and a braking assembly that is disposed in the opening / closing operation assembly and provides a predetermined pressure to the lead screw to provide a holding force.

[0004] Regarding the aforementioned technologies, the braking component is a motor. When working, the rotational torque output by the motor's drive shaft is converted into a pushing and pulling motion between the door and the body through a complex mechanism, including components such as the drive shaft, switching gears, and lead screws. Therefore, the overall size of the mechanism is large and the cost is high, which is not conducive to the structural layout of small cars. At the same time, the manufacturing cost is relatively high, making it difficult to adapt to the widespread application of mass-produced civilian vehicles. Summary of the Invention

[0005] In order to simplify the automatic opening and closing structure of car doors and reduce production costs, this application provides an automatic opening and closing mechanism for car doors.

[0006] This application provides an automatic door opening and closing mechanism, which adopts the following technical solution: An automatic door opening and closing mechanism includes: a movable arm installed between the door and the body, a mounting seat fixedly provided on the body, one end of the movable arm being hinged to the mounting seat, and the other end being inserted into the door and slidingly engaged with the door, the door circumferentially limiting the movable arm so that the movable arm can be rotated when the door is opened and closed, and the movable arm can slide relative to the door along its own length direction. The power component is fixedly installed on the inside of the door and moves synchronously with the door. The power output end of the power component is connected to the transmission of the movable arm. When the power component is working, it directly applies a force along the length of the movable arm. The movable arm transmits the force to the vehicle body, and the door is driven to open and close electrically relative to the vehicle body by means of the reaction force of the vehicle body.

[0007] By adopting the above technical solution, the vehicle body supports and limits the movable arm, allowing it to rotate directionally around its own hinge axis. Under the limiting effect of the door, when the power component works, it pushes the movable arm to slide relative to the door along its own length direction. Thus, the reaction force provided by the vehicle body drives the door to open and close. The overall structure is simple, requires no complex transmission mechanism, has small installation space requirements, and is easy to popularize and promote.

[0008] Optionally, a mounting seat is provided between the movable arm and the vehicle body. The mounting seat is connected to the vehicle body, one end of the movable arm is hinged to the mounting seat, and the other end is inserted into the door and slides in cooperation with the door.

[0009] By adopting the above technical solution, the vehicle body supports the movable arm through the mounting seat, thereby enabling the movable arm to move in coordination with the door.

[0010] Optionally, the power component includes a power source, a transmission disc, and a cable. The power source is fixedly connected to the door, the transmission disc is connected to the output shaft of the power source, one end of the cable is wound and fixed to the transmission disc, and the other end is connected to the end of the movable arm near the mounting base.

[0011] By adopting the above technical solution, when the power source drives the transmission disc to rotate, the transmission disc applies a pulling force to the movable arm through the cable, thereby driving the moving seat to move closer to the transmission disc, thus realizing the automatic closing of the door.

[0012] Optionally, the power component includes a power source, a transmission disc, and a cable. The power source is fixed to the inside of the door, the transmission disc is connected to the output shaft of the power source, the cable is spirally wound around the outside of the transmission disc, and the middle position of the cable is fixedly connected to the transmission disc. One end of the cable is connected to the end of the movable arm near the mounting seat, and the other end is connected to the end of the movable arm away from the mounting seat.

[0013] By adopting the above technical solution, when the power source drives the transmission disc to rotate, the transmission disc drives one end of the cable to wind up and the other end to unwind. By adjusting the rotation direction of the transmission wheel, the sliding direction of the movable arm and the door can be adjusted, thereby realizing the automatic opening or closing of the door and the body.

[0014] Optionally, the power component includes a power source, a transmission disc, and two cables. One end of each cable is fixed to the outer circle of the transmission disc. One cable is connected to the mounting base side, and the other cable is connected to the end of the movable arm away from the mounting base. When the transmission disc rotates around its own axis, the two cables correspondingly realize winding and unwinding.

[0015] By adopting the above technical solution, under the action of the cable, when the transmission disc rotates, it drives one cable to wind up and the other cable to unwind, thereby causing the movable arm to slide relative to the door along with the wound cable, thus realizing the automatic opening or closing of the door.

[0016] Optionally, there are two transmission discs, which are coaxially arranged and can rotate relative to each other. One of the transmission discs is connected to a power source and driven to rotate by the power source. In the non-working state, the power output shaft of the power source can rotate around its own axis when subjected to external force. Two cables are connected to the two transmission discs one to one. An elastic element is provided between the two transmission discs. In the natural state, the elastic element applies a pre-tightening torque to the transmission disc, so that the transmission disc has the tendency to tighten the corresponding cable.

[0017] By adopting the above technical solution, the elastic element applies a torsional force to the two transmission discs, thereby making the transmission discs tend to wind up the corresponding cables, thus keeping the two cables taut and reducing the problem of transmission asynchrony caused by the loosening of the cables during long-term operation.

[0018] Optionally, an elastic element two is provided at the connection point between the cable and the movable arm, away from or near the mounting base. The cable forms a tension buffer connection through the elastic element two, and the elastic element two continuously applies tension force to the cable.

[0019] By adopting the above technical solution, the second elastic element keeps the cable taut and buffers the force between the cable and the movable arm at the moment the transmission disc rotates, thereby reducing the probability of a collision caused by the instantaneous opening and closing of the door due to excessive instantaneous tension.

[0020] Optionally, the interior of the door is equipped with a dust cover, which is placed on the outside of the transmission disc, and the dust cover has a clearance opening for the cable to pass through.

[0021] By adopting the above technical solution, the dust cover protects the cable on the outside of the transmission disc, thereby helping to improve the service life of the cable.

[0022] Optionally, the cable is fitted with a flexible corrugated sleeve, one end of which extends to and is fixed at the connection point between the cable and the movable arm near or away from the mounting seat, and the other end extends to the transmission disc and is fixedly connected to the door.

[0023] By adopting the above technical solution, the corrugated sleeve protects the cable unwound from the drive wheel, thereby further improving the service life of the cable.

[0024] Optionally, the outer side of the transmission disc is provided with a locking groove along the circumferential direction. The locking groove extends in a spiral shape along the axial direction of the transmission disc, and the cable is locked into the locking groove when it is wound up.

[0025] By adopting the above technical solution, the transmission disc positions the cable through the locking groove, reducing the probability of the cable slipping and tangling on the transmission disc, thereby improving the stability of the cable during winding or unwinding.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The vehicle body supports and limits the movable arm, allowing it to rotate in a specific direction around its hinge axis. Under the limiting effect of the door, the power unit pushes the movable arm to slide relative to the door along its length, thereby using the reaction force provided by the vehicle body to open and close the door. The overall structure is simple, requiring no complex transmission mechanism, and has low installation space requirements, making it easy to popularize and promote. 2. Under the action of the cable, when the transmission disc rotates, it drives one cable to wind up and the other cable to unwind, thereby causing the movable arm to slide relative to the door along with the wound cable, thus realizing the automatic opening or closing of the door; 3. The elastic element applies a torsional force to the two transmission discs, which makes the transmission discs tend to wind up the corresponding cables, thereby keeping the two cables taut and reducing the problem of transmission asynchrony caused by the loosening of the cables during long-term operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0028] Figure 2 This is a schematic diagram of the overall structure of Example 2.

[0029] Figure 3 This is a schematic diagram of the position of the transmission disc in Example 3.

[0030] Figure 4 This is a schematic diagram of the transmission disc in Example 3.

[0031] Figure 5 This is a schematic diagram showing the position of the elastic element 1 in Embodiment 4.

[0032] Explanation of reference numerals in the attached drawings: 11. Movable arm; 12. Mounting base; 2. Power component; 21. Power source; 22. Transmission disc; 221. Locking slot; 23. Cable; 24. Elastic component one; 25. Elastic component two; 3. Dust cover; 31. Clearance opening; 4. Corrugated sleeve. Detailed Implementation

[0033] The present application will be further described in detail below with reference to all the accompanying drawings.

[0034] This application discloses an automatic door opening and closing mechanism. Example 1

[0035] Reference Figure 1 An automatic door opening and closing mechanism includes a door and a vehicle body. The door is hinged to the vehicle body and opens and closes with the support of the vehicle body. A movable arm 11 is provided between the vehicle body and the door. A mounting seat 12 corresponding to the movable arm 11 is fixedly provided on the vehicle body. The movable arm 11 is hinged to the mounting seat 12, and the hinge axis of the movable arm 11 is parallel to the hinge axis of the door.

[0036] Reference Figure 1 The end of the movable arm 11 furthest from the mounting base 12 extends to the inside of the door and forms a telescopic sliding engagement with the inside of the door. During the opening and closing of the door, the movable arm 11 swings. The end of the movable arm 11 furthest from the mounting base 12 is designated as the opening end, and its range of motion is greatest during the swinging of the movable arm 11. A power unit 2 is also installed inside the door, which is used to drive the movable arm 11 to move relative to the door.

[0037] Reference Figure 1 In this embodiment, the power component 2 includes a power source 21, a transmission disc 22, and a cable 23. The power source 21 is a motor, which is fixedly installed on the inside of the door. The door supports and limits the power source 21. The transmission disc 22 is coaxially connected to the output shaft of the motor, driving the transmission disc 22 to rotate when the motor is working. Furthermore, to facilitate control of the rotation speed of the transmission disc 22, a speed reducer can be installed between the transmission disc 22 and the power source 21. The specific model of the speed reducer can be selected according to the vehicle model requirements.

[0038] Reference Figure 1 The cable 23 is wound around the outside of the transmission disc 22, and its end is fixedly connected to the transmission disc 22. When the transmission disc 22 rotates, it can drive the cable 23 to perform winding or unwinding actions. The end of the cable 23 away from the transmission disc 22 is connected to the side of the mounting base 12. The connection point of the cable 23 end is relatively fixed. When the door is opened, it drives the transmission disc 22 away from the mounting base 12. At this time, the motor is in standby mode, and the motor output shaft can rotate freely, so that the cable 23 is unwound.

[0039] It should be noted that the cable 23 can be directly connected to the mounting base 12, with the mounting base 12 serving as a support point. Alternatively, a separate movable attachment point can be installed on the vehicle body near the mounting base 12 for the cable 23 to be connected and fixed. In this embodiment, the cable 23 is directly connected to the end of the movable arm 11 near the mounting base 12. The movable arm 11 is provided with a connecting plate for connecting the cable 23. The end of the cable 23 away from the transmission disc 22 is engaged with the connecting plate and is in a positioning state. When the transmission disc 22 winds up the cable 23, the cable 23 applies a pulling force to the connecting plate pointing towards the transmission disc 22.

[0040] Reference Figure 1 When the door needs to be closed, the power source 21 is activated, causing the transmission disc 22 to drive the cable 23 to wind up. The transmission disc 22 exerts a reaction force on the movable arm 11 through the cable 23. The vehicle body exerts a reaction force on the transmission disc 22 through the mounting seat 12, the movable arm 11, and the cable 23. Under the guidance of the movable arm 11, the transmission disc 22 and the power source 21 together drive the door to approach the vehicle body, thereby achieving automatic closing of the door.

[0041] Reference Figure 1A locking groove 221 adapted to the cable 23 is provided on the outer circle of the transmission disc 22. The locking groove 221 is spiral in shape. During the winding process, the cable 23 gradually sinks into the locking groove 221 and contacts the inner wall of the locking groove 221, thereby restricting the relative slippage between the cable 23 and the transmission disc 22, reducing the probability of the cable 23 getting tangled after winding, and improving the smoothness of the cable 23 winding and unwinding.

[0042] Reference Figure 1 Furthermore, an elastic element 25, which is a spring, is provided at the connection between the cable 23 and the movable arm 11. The cable 23 passes through the connecting plate and is slidably connected to it. The elastic element 25 is located on the side of the connecting plate away from the transmission disc 22. A protrusion is fixed to the end of the cable 23 away from the transmission disc 22. One end of the elastic element 25 abuts against the protrusion, and the other end abuts against the connecting plate. When the elastic element 25 is in its natural state, a pushing force away from the connecting plate is applied to the protrusion, at which point the cable 23 is in a tensioned state. By using the elastic element 25 to apply a continuous preload to the cable 23, the probability of the cable 23 loosening is reduced, and the working stability of the cable 23 is improved.

[0043] Reference Figure 1 A dust cover 3 is fitted over the outside of the transmission disc 22. The dust cover 3 is installed on the door and has an opening 31 for the cable 23 to pass through. The cable 23 passes through the opening 31 during winding or unwinding. The dust cover 3 protects the transmission disc 22 and the winding cable 23, thereby reducing the probability of damage to the transmission disc 22 or the cable 23 and helping to improve the service life of the cable 23 and the transmission disc 22.

[0044] Reference Figure 1 Furthermore, a corrugated sleeve 4 is fitted over the outside of the cable 23. One end of the corrugated sleeve 4 extends to the transmission disc 22 and is fixed to the door or dust cover 3, while the other end extends along the cable 23 and is close to the elastic element 25. The corrugated sleeve 4 is connected to the movable arm 11 or the mounting base 12. When the transmission disc 22 drives the cable 23 to wind or unwind, the corrugated sleeve 4 can adapt to the movement of the cable 23, thereby always maintaining protection for the cable 23 and improving the service life of the cable 23.

[0045] The implementation principle of Example 1 is as follows: The vehicle body limits the movable arm 11 through the mounting seat 12, so that the rotation of the movable arm 11 is synchronized with the opening and closing of the door, and the movable arm 11 rotates when the door opens and closes. When the power source 21 drives the transmission plate 22 to rotate, under the transmission action of the cable 23, the transmission plate 22 and the power source 21 cooperate to drive the door to close or open through the reaction force provided by the vehicle body. In this process, there is no need for manual pushing of the door, the mechanism does not require a complex structure, the structure is simple and easy to manufacture, and both the cable 23 and the movable arm 11 are slender structures, requiring little installation space, suitable for small vehicles, and easy to achieve mass production and popularization. Example 2

[0046] Reference Figure 2 The difference between Embodiment 2 and Embodiment 1 lies in the connection structure of the cable 23. In this embodiment, the cable 23 is wound around the outside of the transmission disc 22, and the middle part of the cable 23 is fixedly connected to the transmission disc 22, so that both ends of the cable 23 extend to the side of the mounting base 12 and the opening end of the movable arm 11, respectively. One end of the cable 23 is connected to the end of the movable arm 11 near the mounting base 12, and the other end is connected to the opening end of the movable arm 11. During the rotation of the transmission disc 22, one end of the cable 23 is wound up, and the other end is unwound.

[0047] Reference Figure 2 When the drive disc 22 rotates, causing the cable 23 on one side of the mounting base 12 to wind up, the cable 23 on the opening end side simultaneously unwinds. The tension of the cable 23 applies a pulling force to the end of the movable arm 11 near the mounting base 12, and through the reaction force, it brings the door closer to the vehicle body, thus achieving automatic door closing. When the cable 23 between the drive disc 22 and the mounting base 12 unwinds, the cable 23 between the drive disc 22 and the opening end winds up. The cable 23 applies a pulling force to the opening end of the movable arm 11. At this time, the movable arm 11 gradually extends out from inside the door, and through the reaction force, it moves the door away from the vehicle body, thus achieving automatic door opening. Example 3

[0048] refer to Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 lies in the different composition of the power component 2. In this embodiment, the power component 2 includes two cables 23, both of which are wound around the outside of the transmission disc 22 in opposite directions. One cable 23 is wound around the transmission disc 22 and then connected to the opening end of the rod body, while the other cable 23 is wound around the transmission disc 22 and then connected to the end of the rod body near the mounting base 12. Since the two cables 23 are wound in opposite directions, when the transmission disc 22 rotates, the two cables 23 can be wound up and unwound respectively, thereby driving the rod body and the car door to move relative to each other. The automatic opening and closing of the car door can be achieved by adjusting the rotation direction of the transmission disc 22. Example 4

[0049] refer to Figure 5 The difference between this embodiment and the previous one is that the composition of the power component 2 is different. In this embodiment, the power component 2 includes two transmission discs 22 and two cables 23. The two transmission discs 22 are coaxially rotatably connected, and both transmission discs 22 are sleeved on the outside of the output shaft of the power source 21. One of the transmission discs 22 is coaxially fixed with the output shaft of the power source 21, and the other transmission disc 22 can rotate relative to the output shaft of the power source 21 around its own axis. An elastic element 24 is provided between the two transmission discs 22. Specifically, the elastic element 24 is a torsion spring. The two ends of the torsion spring are respectively connected to the two transmission discs 22, and the elastic force of the torsion spring is much greater than the tension required when the cable 23 is wound up.

[0050] refer to Figure 5 It should be noted that the output shaft of the power source 21 can rotate freely around its own axis when it is not in operation. When the elastic element 24 is in its natural state, it tends to drive the two transmission discs 22 to wind up the corresponding cables 23, thereby applying a preload to the cables 23, so that the cables 23 always remain taut, improving the transmission stability of the cables 23, reducing the problem of asynchronous rotation of the transmission discs 22 and movement of the rod body caused by the loosening of the cables 23, and improving the transmission reliability.

[0051] refer to Figure 5 When the power source 21 drives the corresponding transmission disc 22 to rotate, the transmission disc 22, which is connected to the output shaft of the power source 21, drives another transmission disc 22 to rotate through the elastic element 24. At this time, the two transmission discs 22 rotate synchronously, thereby realizing the winding of one cable 23 and the unwinding of the other cable 23. By controlling the power source 21 to adjust the rotation direction of the transmission disc 22, the relative movement direction of the movable arm 11 and the door can be adjusted, realizing the automatic opening and closing of the door.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A door automatic opening and closing mechanism characterized by: include: The movable arm (11) is installed between the door and the body. The body is fixed with a mounting seat (12). One end of the movable arm (11) is hinged to the mounting seat (12), and the other end is inserted into the door and slides with the door. The door limits the movable arm (11) circumferentially so that the movable arm (11) can rotate when the door is opened and closed, and at the same time the movable arm (11) slides relative to itself along its own length direction. The power component (2) is fixedly installed on the inside of the door and moves synchronously with the door. The power output end of the power component (2) is connected to the movable arm (11) for transmission. When the power component (2) is working, it directly applies a force along its length to the movable arm (11). The movable arm (11) transmits the force to the vehicle body and drives the door to open and close electrically relative to the vehicle body with the help of the reaction force of the vehicle body.

2. The automatic opening and closing mechanism for vehicle door according to claim 1, characterized in that: The power component (2) includes a power source (21), a transmission disc (22) and a cable (23). The power source (21) is fixedly connected to the door. The transmission disc (22) is connected to the output shaft of the power source (21). One end of the cable (23) is wound and fixed to the transmission disc (22), and the other end is connected to the end of the movable arm (11) near the mounting base (12).

3. The automatic door opening and closing mechanism according to claim 1, characterized in that: The power component (2) includes a power source (21), a transmission disc (22), and a cable (23). The power source (21) is fixed to the inside of the door. The transmission disc (22) is connected to the output shaft of the power source (21). The cable (23) is spirally wound around the outside of the transmission disc (22), and the middle position of the cable (23) is fixedly connected to the transmission disc (22). One end of the cable (23) is connected to the end of the movable arm (11) near the mounting seat (12), and the other end is connected to the end of the movable arm (11) away from the mounting seat (12).

4. The automatic door opening and closing mechanism according to claim 1, characterized in that: The power component (2) includes a power source (21), a transmission disc (22), and two cables (23). One end of each cable (23) is fixed to the outer circle of the transmission disc (22). One cable (23) is connected to the side of the mounting base (12), and the other cable (23) is connected to the end of the movable arm (11) away from the mounting base (12). When the transmission disc (22) rotates around its own axis, the two cables (23) correspondingly realize winding and unwinding.

5. The automatic door opening and closing mechanism according to claim 4, characterized in that: Two transmission discs (22) are provided, and the two transmission discs (22) are arranged coaxially and can rotate relative to each other. One of the transmission discs (22) is connected to the power source (21) and is driven to rotate by the power source (21). In the non-working state, the power output shaft of the power source (21) can rotate around its own axis when subjected to external force. Two cables (23) are connected to the two transmission discs (22) one by one. An elastic element (24) is provided between the two transmission discs (22). The elastic element (24) applies a pre-tightening torque to the transmission disc (22) in the natural state, so that the transmission disc (22) has the tendency to tighten the corresponding cable (23).

6. An automatic door opening and closing mechanism according to any one of claims 2 to 5, characterized in that: The connection between the cable (23) and the movable arm (11) is provided with an elastic element two (25). The cable (23) forms a tension buffer connection through the elastic element two (25), and the elastic element two (25) continuously applies tension force to the cable (23).

7. An automatic door opening and closing mechanism according to any one of claims 2 to 5, characterized in that: The interior of the door is provided with a dust cover (3), which is located on the outside of the transmission disc (22). The dust cover (3) has a clearance opening (31) for the cable (23) to pass through.

8. An automatic door opening and closing mechanism according to any one of claims 2 to 5, characterized in that: The cable (23) is fitted with a flexible and retractable corrugated sleeve (4). One end of the corrugated sleeve (4) extends to the connection between the cable (23) and the movable arm (11) and is fixed thereon. The other end extends to the position of the transmission disc (22) and is fixedly connected to the door.

9. An automatic door opening and closing mechanism according to any one of claims 2 to 5, characterized in that: The transmission disc (22) has a circumferentially circumferentially groove (221) on its outer side. The groove (221) extends spirally along the axis of the transmission disc (22). When the cable (23) is wound up, it is inserted into the groove (221).

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