Vehicle door and vehicle

Abstract

The invention provides a vehicle door and a vehicle. The vehicle door comprises a vehicle door body; one end of the first connecting arm is hinged to the vehicle door body, and the other end is hinged to a vehicle body; one end of the second connecting arm is hinged to the vehicle door body, and the other end is hinged to a vehicle body; when the vehicle door body is in a closed state, the length of the second connecting arm is a first length; when the vehicle door body is opened, the length of the second connecting arm is kept at the second length; and the second length is smaller than the first length, so that when the vehicle door is opened, the second connecting arm is fixed in length, and the second connecting arm, the first connecting arm, the vehicle door and the vehicle body form a unique four-connecting-rod mechanism. When external force is applied, the posture of the vehicle door cannot be changed, the motion trail of the vehicle door is unique, it is guaranteed that the vehicle door can be accurately locked, and the stability of the vehicle door is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a vehicle door and a vehicle. Background Art

[0002] Car swing doors are being adopted by more and more cars due to their advantages such as large door opening, small door opening space, and little impact from vehicle shape.

[0003] Typically, a car swing door comprises two connecting arms, which rotate to drive the door to move and open and close, and at least one of the connecting arms is retractable in length; however, when the door is opened, the door is easily affected by external forces and cannot maintain a stable posture and motion trajectory, so that the door cannot be accurately locked during the closing process, resulting in the door being unable to close normally, and there is a problem of poor door stability. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a vehicle door and a vehicle with better stability.

[0005] In order to solve the above problems, in the first aspect, a vehicle door is provided, comprising: a vehicle door body; a first connecting arm, one end of which is hinged to the vehicle door body, and the other end of which is suitable for being hinged to the vehicle body; a second connecting arm, one end of which is hinged to the vehicle door body, and the other end of which is suitable for being hinged to the vehicle body; the first connecting arm and the second connecting arm are arranged at intervals along the length direction of the vehicle door body; when the vehicle door body is closed, the length of the second connecting arm is a first length; when the vehicle door body is opened, the length of the second connecting arm is maintained at the second length; the second length is less than the first length.

[0006] In the vehicle door with the above structure, when the vehicle door body is closed, the length of the second connecting arm is the first length; when the vehicle door body is opened, the length of the second connecting arm is maintained at the second length, and the second length is less than the first length. When the vehicle door is opened, the length of the second connecting arm is fixed, and it forms a unique four-bar linkage with the first connecting arm, the vehicle door and the vehicle body. When subjected to external force, the posture of the vehicle door will not change, and the movement trajectory of the vehicle door is unique, which ensures that the vehicle door can be locked accurately and improves the stability of the vehicle door.

[0007] Optionally, the first connecting arm and the second connecting arm are spaced apart in the length direction of the door body; during the switching process of the door body between the closed state and the open state, the second connecting arm can be adjusted between the first length and the second length.

[0008] Optionally, the second connecting arm includes a first connecting rod, a second connecting rod and a length adjustment mechanism, the first connecting rod and the second connecting rod are slidably connected to adjust the length of the second connecting arm, the first end of the first connecting rod is suitable for being hinged to the vehicle body, and the first end of the second connecting rod is hinged to the door body; the second end of the first connecting rod is slidably matched with the second end of the second connecting rod; the length adjustment mechanism is respectively connected to the first connecting rod and the second connecting rod so that the length of the second connecting arm can be adjusted between the first length and the second length.

[0009] Optionally, the length adjustment mechanism includes: a limit groove formed on the first connecting rod, having a first groove path and a second groove path, the first groove path and the second groove path are connected; a limit member connected to the second connecting rod, the limit member can move in the limit groove; when the limit member moves to the first groove path, the length of the second connecting arm is adjustable from the first length to the second length; when the limit member moves to the second groove path, the second connecting arm is maintained at the second length.

[0010] Optionally, the first slot path is parallel to the length direction of the first connecting rod, and the second slot path is perpendicular to the first slot path.

[0011] Optionally, the limiting member is a cylinder, which is rotatably connected to the second connecting rod.

[0012] Optionally, the length adjustment mechanism further includes a driving member, and the driving member is used to drive the limiting member to switch between the first slot path and the second slot path.

[0013] Optionally, the length adjustment mechanism further includes a rotating rod, wherein the rotating rod and the second connecting rod are hinged to a first rotating pair; the rotating rod is connected to the driving member; and the limiting member is connected to an end of the rotating rod away from the driving member.

[0014] Optionally, the driving member is a linear driving member, and the rotating rod also includes a first transmission rod and a second transmission rod, the first transmission rod and the second transmission rod are arranged at an angle and are connected to the first rotating pair; the limiting member is connected to the end of the first transmission rod away from the first rotating pair, the first end of the linear driving member and the second connecting rod are hinged to the second rotating pair, the second end of the linear driving member and one end of the second transmission rod are hinged to the third rotating pair, and the linear driving member pushes the second transmission rod to enable the rotating rod to rotate around the first rotating pair.

[0015] Optionally, a first avoidance portion is formed on the rotating rod at the first rotating joint, and the first avoidance portion is used to prevent the rotating rod from colliding with the first connecting rod or the second connecting rod when the rotating rod rotates.

[0016] Optionally, the second revolute pair and the third revolute pair are respectively located on two sides of a center line of the second connecting rod.

[0017] Optionally, the second connecting rod is formed with a receiving groove, and the receiving groove extends along the length direction of the second connecting rod; two side surfaces of the receiving groove constitute sliding surfaces for sliding connection between the second connecting rod and the first connecting rod; and the rotating rod is received in the receiving groove.

[0018] Optionally, a second avoidance portion is formed on the side wall of the accommodating groove, and the second avoidance portion is located on the side of the accommodating groove close to the third rotating pair, and is used to prevent the linear driving member from colliding with the accommodating groove when pushing the second transmission rod.

[0019] Optionally, the linear drive member is sleeved with a first elastic member, one end of the first elastic member abuts against the second rotating pair, and the other end abuts against the third rotating pair. When the linear drive member has no driving force, the first elastic member enables the linear drive member to maintain an extended state.

[0020] Optionally, the second connecting arm further comprises a second elastic member, a first end of the second elastic member being connected to the first end of the first connecting rod, and a second end of the second elastic member being connected to the second end of the second connecting rod, so as to provide a preload force to the sliding connection between the first connecting rod and the second connecting rod.

[0021] Optionally, it also includes a first lock head, a first lock ring, a second lock head and a second lock ring, the first lock head is installed at one end of the door body, and the second lock head is installed at the other end of the door body; the first lock ring and the second lock ring are suitable for installation on the vehicle body, the first lock head cooperates with the first lock ring, and the second lock head cooperates with the second lock ring to lock or unlock the door body to the vehicle body.

[0022] Optionally, during the process of the door body being opened and closed, the first lock head first contacts and cooperates with the first lock ring, and then the second lock head contacts and cooperates with the second lock ring. When the first lock head contacts the first lock ring, the length of the second connecting arm switches from the second length to the first length.

[0023] Optionally, the length adjustment mechanism also includes: a guide base suitable for being installed on the vehicle body and forming a guide groove; a guide member connected to the second connecting rod; during the process from opening to closing the vehicle door, the guide member cooperates with the guide groove to drive the second connecting rod to slide relative to the first connecting rod, thereby switching the second connecting arm between the first length and the second length.

[0024] Optionally, the guide groove includes a third groove and a fourth groove, the fourth groove is open at one end and connected to the third groove at the other end, the center line of the fourth groove is an arc, and the center of the arc is located on the rotation axis of the hinge between the second connecting arm and the body; the third groove extends to a closed end in a direction away from the rotation axis of the hinge between the second connecting arm and the body; when the guide member is located in the fourth groove, the length of the second connecting arm is the second length; when the guide member enters the third groove and slides toward the closed end, the length of the second connecting arm switches from the second length to the first length.

[0025] Optionally, the guide member is a sliding wheel rotatably connected to the second connecting rod.

[0026] In a second aspect, a vehicle is provided, comprising the vehicle door as described above, and having the same beneficial effects as the vehicle door as described above.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 It is a schematic diagram of a top view of the structure when a vehicle door is locked according to an embodiment of the present disclosure;

[0030] Figure 2 It is a schematic diagram of a top view of the structure when a vehicle door is opened according to an embodiment of the present disclosure;

[0031] Figure 3 This is a schematic structural diagram of a second connecting arm in a first length state according to an embodiment of the present disclosure;

[0032] Figure 4 This is a schematic structural diagram of a second connecting arm in a second length state according to an embodiment of the present disclosure;

[0033] Figure 5 is a schematic diagram of the rotating rod structure according to an embodiment of the present disclosure;

[0034] Figure 6 It is a schematic diagram of the structure when the vehicle door is locked as viewed from above according to an embodiment of the present disclosure;

[0035] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0036] Figure 8 is a schematic diagram of a first connecting rod structure according to an embodiment of the present disclosure;

[0037] Fig. 9 is a schematic diagram of the second connecting rod structure according to an embodiment of the present disclosure;

[0038] Fig.10 It is a schematic diagram of the partial structure of the second connecting arm according to an embodiment of the present disclosure.

[0039] Reference numerals:

[0040] Door body 100; vehicle body 200; first connecting arm 300; second connecting arm 400; driving device 500

[0041] First lock head 110; second lock head 120; first lock ring 240; second lock ring 250;

[0042] First base 210; second base 220; guide rail base 230; guide groove 231;

[0043] The first connecting rod 410; the second connecting rod 420; the guide member 423; the linear driving member 430; the rotating rod 440; the first transmission rod 441; the second transmission rod 444; the limiting groove 412; the limiting member 443; the sliding groove 413; the first articulated bearing 414; the second articulated bearing 425; the first rotating pair 442; the second rotating pair 434; the third rotating pair 433; the first elastic member 432; the second elastic member 426; the first avoiding portion 445; the second avoiding portion 424;

[0044] The first slot circuit P1; the second slot circuit P2; the third slot circuit R1; the fourth slot circuit R2. DETAILED DESCRIPTION

[0045] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and cannot be understood as limiting the present disclosure.

[0046] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "multiple" means two or more.

[0047] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0048] To facilitate understanding of the following embodiments, the related art is first described. In the related art, a swing door includes two connecting arms, and the two connecting arms rotate to drive the door to move and realize opening and closing of the door, wherein the length of at least one connecting arm is retractable, so that the length of the second link arm changes during the door opening and closing operation, that is, when the door side engaging portion is engaged with the vehicle body side engaging portion, based on the action of the telescopic machine, the opening and closing motion trajectory of the door changes from an arc-shaped sliding trajectory to a linear sliding trajectory. Compared with the solution of two connecting arms with fixed lengths, this design occupies less space during the door opening process; but due to the retractability, when the door is opened, if the door is subjected to external force, the door will rotate with the hinge point of the fixed length connecting arm and the door as the rotation center, making the posture of the door in the open state unstable, which will cause unpredictable risks to the user leaning against the door; in addition, when the door is closed, that is, when the door side is not combined with the vehicle body side, if the door is subjected to external force, it will also rotate, so that the locking matching parts of the door and the vehicle body will be misaligned, and the stability of the combination of the door and the vehicle body is not high.

[0049] Reference below Figure 1-10 Embodiments according to the present disclosure are described.

[0050] like Figure 1-2A vehicle door disclosed in the present invention comprises: a vehicle door body 100; a first connecting arm 300, one end of which is hinged to the vehicle door body 100, and the other end of which is suitable for being hinged to the vehicle body 200; a second connecting arm 400, one end of which is hinged to the vehicle door body 100, and the other end of which is suitable for being hinged to the vehicle body 200; when the vehicle door body 100 is in a closed state, the length of the second connecting arm 400 is a first length L1, and when the vehicle door body 100 is in an open state, the length of the second connecting arm 400 is maintained at a second length, and the second length L2 is less than the first length L1.

[0051] In the vehicle door with the above structure, when the vehicle door body 100 is in the closed state, the length of the second connecting arm 400 is the first length L1, and when the vehicle door body 100 is in the open state, the length of the second connecting arm 400 is maintained at the second length, and the second length L2 is less than the first length L1. In the process of switching between the closed state and the open state of the vehicle door body 100, the second connecting arm 400 can be adjusted between the first length and the second length. Under the condition of ensuring a small space occupied by the door opening, the length of the second connecting arm 400 is fixed, and it forms a unique four-bar linkage with the first connecting arm 300, the vehicle door body 100 and the vehicle body 200. When subjected to external force, the posture of the vehicle door will not change, and the movement trajectory of the vehicle door is unique, which ensures that the vehicle door can be locked accurately and improves the stability of the vehicle door.

[0052] In this embodiment, the first connecting arm 300 and the second connecting arm 400 are arranged at intervals along the length direction of the door body 100; when the door body 100 is switched between the closed state and the open state, the second connecting arm 400 can be adjusted between the first length and the second length. This process can be when the door opening is a predetermined value (for example but not limited to 5%, 10%, 20% or 30%) to fully closed, which is not limited here. In this way, the movement trajectory of the door is more stable during the closing process. In some embodiments, the first connecting arm and the second connecting arm can also be arranged at intervals along the height direction of the door body. This type of door is opened and closed up and down. When the door is switched between the closed state and the open state, the second connecting arm can be adjusted between the first length and the second length, which can also improve the stability of the door.

[0053] Specifically, the door body 100 includes a first lock head 110 and a second lock head 120, which are respectively arranged at both ends of the door 100. A first lock ring 240 and a second lock ring 250 are arranged on the vehicle body 200. The first lock head 110 cooperates with the first lock ring 240 to lock one end of the door 100; the second lock head 120 cooperates with the second lock ring 250 to lock the other end of the door 100. In the process of switching the door body from an open state to a closed state, the first lock head 110 first contacts the first lock ring 240, at which time the length of the second connecting arm 400 switches from the second length L2 to the first length L1. Before locking, since the second connecting arm 400 has a fixed length, even if it is subjected to external force, the motion trajectory will not change, so the accuracy of locking the door is higher, and the stability of the door is improved. As the first connecting arm 300 and the second connecting arm 400 continue to rotate, the second lock head 120 contacts the second lock ring 250 until the door is closed to the vehicle body, at which time the length of the second connecting arm 400 is the first length.

[0054] The first connecting arm 300 can be a main swing arm, which bears most of the load from the door body. The second connecting arm 400 can be an auxiliary swing arm that bears a small part of the door load. When the first connecting arm 300 rotates around its hinge point with the vehicle body 200, the second connecting arm 400 also rotates around its hinge point with the vehicle body 200, thereby driving the door 100 to swing horizontally. Of course, the first connecting arm can also be an auxiliary swing arm, and the second connecting arm can also be a main swing arm, which is not limited here. The door can also include a driving device (not shown in the figure) for driving the first connecting arm 300 and / or the second connecting arm 400 to rotate, thereby driving the door to open or close. The driving device can be electrically driven, hydraulically driven or pneumatically driven, and can be linearly driven or rotary driven, which is not limited here.

[0055] like Figure 3 , Figure 4 As shown, in this embodiment, the second connecting arm includes a first connecting rod 410, a second connecting rod 420 and a length adjustment mechanism. The first connecting rod 410 and the second connecting rod 420 are slidably connected to adjust the length of the second connecting arm. One end of the first connecting rod 410 is suitable for being hinged to the vehicle body 200, and one end of the second connecting rod 420 is hinged to the door body 100; the length adjustment mechanism is respectively connected to the first connecting rod 410 and the second connecting rod 420, so that the length of the second connecting arm 400 can be adjusted between the first length L1 and the second length L2. The sliding connection between the first connecting rod 410 and the second connecting rod 420 is mechanically limited by the length adjustment mechanism, which is easy to control and has low cost. In some embodiments, the second connecting arm 400 can directly adopt a servo electric push rod to realize the switching control between the first length and the second length by electric control. This solution has a simple structure, but has high control requirements for the electric push rod and high cost.

[0056] like Figure 3and Figure 4 In the illustrated embodiment, the length adjustment mechanism includes: a limiting groove 412 formed on the first connecting rod 410, having a first groove path P1 and a second groove path P2, and the first groove path P1 and the second groove path P2 are connected. Figure 8 The limiting groove 412 has a first groove path P1 and a second groove path P2, the first groove path P1 and the second groove path P2 intersect vertically, and the first groove path P1 is parallel to the length direction of the first connecting rod 410; Figures 3 to 5 The limit member 443 is connected to the second connecting rod 420, and the limit member 443 can move in the limit groove 412; when the limit member 443 moves to the first groove path P1, it is restricted by the end of the first groove path P1, so that the second connecting arm 400 does not exceed the first length L1; when the limit member 443 moves to the second groove path P2, the limit member 443 is restricted by the two straight edges of the second groove path P2, so that the second connecting arm 400 is maintained at the second length L2.

[0057] In some embodiments, the limiting member 443 is a cylinder, which is rotatably connected to the second connecting rod 420 , so that the limiting member 443 slides more smoothly in the limiting groove 412 .

[0058] In this embodiment, the length adjustment mechanism further includes a driving member, which is used to drive the limiting member 443 to switch between the first groove path P1 and the second groove path P2. The driving member can be a rotary driving member or a linear driving member.

[0059] like Figures 3 to 5 In the illustrated embodiment, the length adjustment mechanism further includes a rotating rod 440, which is hinged to the first rotating pair 442 with the second connecting rod 420; and a stopper 443 is connected to an end of the rotating rod 440 away from the driving member 430. In some embodiments, the driving member can directly drive the stopper 443 to switch the stopper 443 between the first slot path P1 and the second slot path P2. The transmission method can be a gear rack, a screw nut, etc., which is not limited here.

[0060] In this embodiment, the driving member is a linear driving member 430, and the rotating rod 440 further includes a first transmission rod 441 and a second transmission rod 444. The first transmission rod 441 and the second transmission rod 444 are arranged at an angle and connected to the first rotating pair 442. The angle can be 120°, 140° or 160°, etc., which is not limited here. The stopper 443 is connected to the end of the first transmission rod 441 away from the driving member. One end of the linear driving member 430 is hinged to the second rotating pair 434 with the second connecting rod 420, and the other end is hinged to the other end of the transmission rod 444 with the third rotating pair 433. The linear driving member 430 pushes the second transmission rod 444 so that the rotating rod 440 can rotate around the rotating pair 442. In some embodiments, the driving member can be a rotating driving member, and the rotating shaft of the rotating driving member directly drives the first rotating pair 442 to rotate so that the stopper 443 switches between the first slot P1 and the second slot P2.

[0061] In this embodiment, the rotating rod 440 is formed with a first avoidance portion 445 at the first rotation pair 442, and the first avoidance portion 445 is used to prevent the rotating rod 440 from colliding with the first connecting rod 410 or the second connecting rod 420 when the rotating rod 440 rotates. The first avoidance portion 445 can prevent the rotating rod 440 from being interfered with when rotating, and can also make the width of the first connecting rod 410 or the second connecting rod 420 smaller.

[0062] In this embodiment, the second rotational pair 434 and the third rotational pair 433 are respectively located on two sides of the center line of the second connecting rod 420 , so that the rotating rod 440 can be compactly disposed on the second connecting rod 420 .

[0063] like Figure 6 to Figure 7In the illustrated embodiment, the length adjustment mechanism includes: a guide base 230, which is suitable for being installed on the vehicle body and is formed with a guide groove 231, wherein the guide groove 231 includes a third groove path R1 and a fourth groove path R2; a guide member 423, which is connected to the second connecting rod 420; when the second connecting arm 400 rotates to the state where the door body is locked or locked, the guide member 423 cooperates with the guide groove 231 to drive the second connecting rod 420 to slide relative to the first connecting rod 410. One end of the fourth groove path R2 is open, and the other end is connected to the third groove path R1. The center line of the fourth groove path R2 is an arc, and the center of the arc is located on the rotation axis of the second connecting arm 400 and the vehicle body; the third groove path R1 extends to a closed end in a direction away from the rotation axis of the second connecting arm 400 and the vehicle body. When the guide member 423 is located in the fourth groove path R2, the length of the second connecting arm 400 is the second length L2; as the second connecting arm 400 continues to rotate, the guide member 423 enters the third groove path R1, and when the guide member 423 enters the third groove path R1 and slides toward the closed end, the second connecting arm 400 switches from the second length L2 to the first length L1. This solution changes the length of the second connecting arm 400 through the guide base 230 and the guide member 423, and limits the second connecting arm to be fixed to the second length, i.e., a shorter length, when the door is open through the limit groove 412 and the limit member 443. Compared with the related art in which the length of the second connecting arm is not fixed when the door is open, the embodiment of the present disclosure occupies less space and will not be affected by external forces to change the posture of the door; and the guide base has a simple and compact structure, occupies less space in the vehicle, and can be flexibly set to match different vehicle models.

[0064] The guide member 423 is a sliding wheel, which is rotatably connected to the second connecting rod 420. In this way, the guide member 423 can roll in the guide groove 231, so that the second connecting arm 400 can switch between the first length and the second length more smoothly.

[0065] like Figure 8 In the embodiment, one end of the first connecting rod 410 hinged to the vehicle body 200 adopts a first hinge bearing 414, and the first connecting rod 410 includes a slide groove 413, which extends along the length direction of the first connecting rod 410, so that the second connecting rod 420 slides in the first connecting rod 410. Of course, in some embodiments, the second connecting rod 420 may also include a slide groove, and the first connecting rod slides in the second connecting rod, which is not limited here.

[0066] like Figure 3 , Figure 4 and Fig. 9In the illustrated embodiment, the second connecting rod 420 is hinged to the vehicle door 100 at one end thereof by a second hinge bearing 425, and the second connecting rod 420 includes a receiving groove 421 and a hinge hole 422 disposed in the receiving groove 421. The receiving groove 421 extends along the length direction of the second connecting rod 420, the rotating rod 440 is disposed in the receiving groove 421, and the hinge point between the rotating rod 440 and the second connecting rod 420 is disposed in the hinge hole 422. The second connecting rod 420 has a mounting block 426 hinged to the linear drive member at one end thereof close to the second hinge bearing 425. The two side surfaces of the receiving groove 421 are also sliding surfaces for the second connecting rod 420 to be slidably connected to the first connecting rod 410; the rotating rod 440 is accommodated in the receiving groove 421, and such a design can make the second connecting arm 400 compact in structure and occupy a small space.

[0067] The receiving groove 421 is formed with a second avoidance portion 424 , which is located at a side of the receiving groove 421 close to the third rotation pair 433 , and is used to prevent the transmission mechanism from colliding with the receiving groove 421 when the linear driving member 430 pushes the second transmission rod 444 .

[0068] In this embodiment, the linear drive member 430 is sleeved with a first elastic member 432, one end of the first elastic member 432 abuts against the second rotating pair 434, and the other end abuts against the third rotating pair 433. When the linear drive member 430 has no driving force, the first elastic member 432 keeps the linear drive member 430 in an extended state. Accordingly, the limit member 443 can be kept in the second groove path P2, that is, the second connecting arm 400 can be stably kept at the second length L2. In this way, when the door is in the open state, even if it is subjected to an external force perpendicular to the door surface, the door will not shake, thereby improving the stability of the door. The first elastic member 432 can be a spring.

[0069] like Fig.10 In the embodiment, the second connecting arm also includes a second elastic member 426, one end of the second elastic member 426 is connected to one end of the first connecting rod 410 hinged to the vehicle body, and the other end of the second elastic member 426 is connected to one end of the second connecting rod 420 sliding on the first connecting rod 410, so as to provide a pre-tightening force to the sliding connection between the first connecting rod 410 and the second connecting rod 420, thereby playing a role in buffering and enhancing the stability of movement. The second elastic member 426 can be a spring, rubber, pneumatic or hydraulic structure, which is not limited here.

[0070] The present application provides a vehicle. The vehicle includes a door as described above, and the vehicle can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, an extended-range electric vehicle, a fuel vehicle, etc. The vehicle can also be a car, a truck, a bus, a truck, a trailer, etc. In some embodiments, the vehicle also includes a sensor and a controller, the sensor is connected to the controller to transmit the open and closed state signal of the door, and the controller is connected to the door; when the door is in the open state, the controller controls the length of the second connecting arm 400 to remain at the second length; during the switching process of the door between the open state and the closed state, the controller controls the length of the second connecting arm 400 to be adjusted between the first length and the second length. Specifically, the sensor can be a laser sensor, a travel switch, a pressure sensor, a contact sensor, etc., which can be set at the vehicle body, the door, the first and second connecting arms, etc. The controller can be a door electronic control unit, or a domain controller, which can be installed on the door or the vehicle body. The above is not limited here. Through the signal acquisition and transmission of the sensor and the transmission of the control signal of the controller, the switching and maintenance of the second connecting arm between the first length and the second length are more accurate and efficient, further improving the stability of the door. For example, a contact sensor is provided at the first lock ring. When the first lock contacts the first lock ring when the door is closed, the sensor transmits a closing signal to the controller, and the controller controls the linear drive member 430 to contract so that the limit member 443 moves from the second groove path P2 to the first groove path P1. The second connecting rod 420 can slide relative to the first connecting rod 410 under the cooperation of the guide member 423 and the guide groove 231, so that the length of the second connecting arm switches from the second length to the first length; when the first lock is separated from the first lock ring when the door is opened, the sensor transmits a door opening signal to the controller, and the controller controls the linear drive member 430 to extend so that the limit member 443 moves from the first groove path P1 to the first groove path P2, so that the length of the second connecting arm remains at the second length. In this way, in the door opening state and the door closing process, the length of the second connecting arm 400 is fixed, and it forms a unique four-bar linkage with the first connecting arm 300, the door body 100 and the vehicle body 200. When subjected to external force, the posture of the car door will not change, and the movement trajectory of the car door is unique, ensuring that the car door can be locked accurately and improving the stability of the car door.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although embodiments of the present disclosure have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A vehicle door, characterized in that: include: Door body (100); A first connecting arm (300), a first end of which is hinged to the door body (100), and a second end of which is suitable for being hinged to the vehicle body; A second connecting arm (400) with adjustable length, a first end of which is hinged to the door body (100) and a second end of which is suitable for being hinged to the vehicle body; When the vehicle door body (100) is in a closed state, the length of the second connecting arm (400) is a first length; When the vehicle door body (100) is in an open state, the length of the second connecting arm (400) is maintained at a second length; the second length is smaller than the first length.

2. The vehicle door according to claim 1, characterized in that: The first connecting arm (300) and the second connecting arm (400) are arranged at intervals in the length direction of the door body (100); during the switching process of the door body (100) between the closed state and the open state, the second connecting arm (400) can be adjusted between the first length and the second length.

3. The vehicle door according to claim 1 or 2, characterized in that: The second connecting arm (400) includes a first connecting rod (410), a second connecting rod (420) and a length adjustment mechanism. The first connecting rod (410) and the second connecting rod (420) are slidably connected to adjust the length of the second connecting arm (400). The first end of the first connecting rod (410) is suitable for being hinged to the vehicle body (200), the first end of the second connecting rod (420) is hinged to the door body (100), and the second end of the first connecting rod (410) is slidably matched with the second end of the second connecting rod (420). The length adjustment mechanism is respectively connected to the first connecting rod (410) and the second connecting rod (420) so that the length of the second connecting arm can be adjusted between the first length and the second length.

4. The vehicle door according to claim 3, characterized in that: The length adjustment mechanism comprises: A limiting groove (412) is formed on the first connecting rod (410), and has a first groove path (P1) and a second groove path (P2), wherein the first groove path (P1) and the second groove path (P2) are connected; A limiting member (443) is connected to the second connecting rod (420), and the limiting member can move in the limiting groove (412); when the limiting member (443) moves to the first groove path (P1), the length of the second connecting arm is adjustable from the first length to the second length; when the limiting member (443) moves to the second groove path (P2), the second connecting arm is maintained at the second length.

5. The vehicle door according to claim 4, characterized in that: The first slot path (P1) is parallel to the length direction of the first connecting rod (410), and the second slot path (P2) is perpendicular to the first slot path (P1).

6. The vehicle door according to claim 4, characterized in that: The limiting member (443) is a cylinder and is rotatably connected to the second connecting rod (420).

7. The vehicle door according to claim 4, characterized in that: The length adjustment mechanism further comprises a driving member, and the driving member is used to drive the limiting member (443) to switch between the first slot path (P1) and the second slot path (P2).

8. The vehicle door according to claim 7, characterized in that: The length adjustment mechanism also includes a rotating rod (440), wherein the rotating rod (440) and the second connecting rod (420) are hinged to a first rotating pair (442); the rotating rod (440) is connected to the driving member; and the limiting member (443) is connected to an end of the rotating rod (440) away from the driving member.

9. The vehicle door according to claim 8, characterized in that: The driving member is a linear driving member (430), and the rotating rod (440) includes a first transmission rod (441) and a second transmission rod (444), wherein the first transmission rod (441) and the second transmission rod (444) are arranged at an angle and connected to the first rotating pair (442); the limiting member (443) is connected to an end of the first transmission rod (441) away from the first rotating pair (442), the first end of the linear driving member (430) and the second connecting rod (420) are hinged to the second rotating pair (434), the second end of the linear driving member (430) and one end of the second transmission rod (444) are hinged to the third rotating pair (433), and the linear driving member (430) pushes the second transmission rod (444) to enable the rotating rod (440) to rotate around the first rotating pair (442).

10. The vehicle door according to claim 9, characterized in that: The rotating rod (440) is formed with a first avoidance portion (445) at the first rotating pair (442), and the first avoidance portion (445) is used to prevent the rotating rod (440) from colliding with the first connecting rod (410) or the second connecting rod (420) when rotating.

11. The vehicle door according to claim 9, characterized in that: The second rotation pair (434) and the third rotation pair (433) are respectively located on two sides of the center line of the second connecting rod (420).

12. The vehicle door according to claim 8, characterized in that: The second connecting rod (420) is formed with a receiving groove (421), the receiving groove (421) extending along the length direction of the second connecting rod (420), and the rotating rod (440) is received in the receiving groove (421).

13. The vehicle door according to claim 12, characterized in that: A second avoidance portion (424) is formed on the side wall of the accommodating groove (421), and the second avoidance portion (424) is located on the side of the accommodating groove (421) close to the third rotating pair (433), and is used to prevent the linear driving member (430) from colliding with the side wall of the accommodating groove (421) when pushing the second transmission rod (444).

14. The vehicle door according to claim 9, characterized in that: The linear drive member (430) is sleeved with a first elastic member (432), one end of the first elastic member (432) abuts against the second rotating pair (434), and the other end abuts against the third rotating pair (433), and when the linear drive member (430) has no driving force, the first elastic member (432) enables the linear drive member (430) to maintain an extended state.

15. The vehicle door according to claim 3, characterized in that: The second connecting arm (400) also includes a second elastic member (426), a first end of the second elastic member (426) is connected to the first end of the first connecting rod (410), and a second end of the second elastic member (426) is connected to the second end of the second connecting rod (420) to provide a preload force to the sliding connection between the first connecting rod (410) and the second connecting rod (420).

16. The vehicle door according to claim 1, characterized in that: It also includes a first lock head (110), a first lock ring (240), a second lock head (120) and a second lock ring (250), wherein the first lock head (110) is installed at one end of the vehicle door body (100), and the second lock head (120) is installed at the other end of the vehicle door body; the first lock ring (240) and the second lock ring (250) are suitable for being installed on a vehicle body, the first lock head (110) cooperates with the first lock ring (240), and the second lock head (120) cooperates with the second lock ring (250) to lock or unlock the vehicle door body (100) to the vehicle body.

17. The vehicle door according to claim 16, characterized in that: During the process of the vehicle door body (100) from opening to closing, the first lock head (110) first contacts and cooperates with the first lock ring (240), and then the second lock head (120) contacts and cooperates with the second lock ring (2500). When the first lock head (110) contacts the first lock ring (240), the length of the second connecting arm (400) switches from the second length to the first length.

18. The vehicle door according to any one of claims 3 to 15, characterized in that: The length adjustment mechanism also includes: A guide base (230) is suitable for being installed on the vehicle body (200) and is formed with a guide groove (231); A guide member (423) is connected to the second connecting rod (420); during the process of opening and closing the vehicle door, the guide member (423) cooperates with the guide groove (231) to drive the second connecting rod (420) to slide relative to the first connecting rod (410), thereby switching the second connecting arm (400) between the first length and the second length.

19. The vehicle door according to claim 18, characterized in that: The guide groove (231) includes a third groove (R1) and a fourth groove (R2); one end of the fourth groove (R2) is open and the other end is connected to the third groove (R1); the center line of the fourth groove (R2) is an arc, and the center of the arc is located on the rotation axis of the second connecting arm (400) and the vehicle body; the third groove (R1) extends to a closed end in a direction away from the rotation axis of the second connecting arm (400) and the vehicle body; when the guide member (423) is located in the fourth groove (R2), the length of the second connecting arm (400) is the second length; when the guide member (423) enters the third groove (R1) and slides toward the closed end, the length of the second connecting arm (400) switches from the second length to the first length.

20. The vehicle door according to claim 18, characterized in that The guide member (423) is a sliding wheel, which is rotatably connected to the second connecting rod (420).

21. A vehicle, characterized in that: Comprising a vehicle door as described in any one of claims 1-20.

22. The vehicle according to claim 21, characterized in that It also includes a sensor and a controller, wherein the sensor is connected to the controller to transmit an open / closed state signal of the vehicle door, and the controller is connected to the vehicle door; when the vehicle door is in an open state, the controller controls the length of the second connecting arm (400) to remain at a second length; when the vehicle door is switching between an open state and a closed state, the controller controls the length of the second connecting arm (400) to be adjustable between the first length and the second length.

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