Crawling ladder structure and vehicle

Abstract

The invention discloses a crawling ladder structure and a vehicle. The crawling ladder structure comprises a first crawling ladder, a second crawling ladder and a locking device, the first crawling ladder is connected with the second crawling ladder, the first crawling ladder is used for being fixed to a vehicle body of a vehicle, and the second crawling ladder is suitable for moving relative to the first crawling ladder under the action of external force so as to be in an unfolded state or a folded state; the locking device is arranged on the first ladder stand, and the locking device is suitable for locking the second ladder stand in a storage state; according to the ladder stand structure, the first ladder stand and the second ladder stand are arranged, the second ladder stand can move relative to the first ladder stand under the action of external force to be in the unfolded state, the overall length of the ladder stand structure is large, the distance between the ladder stand structure and the ground is shortened, climbing is facilitated, and the second ladder stand can move relative to the first ladder stand to be in the folded state; and the second crawling ladder is kept in a storage state through the locking device, so that the whole crawling ladder structure is small and exquisite.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to a ladder structure and a vehicle. Background Art

[0002] Ladders can be used in various aspects of vehicles, such as roof racks. Since the roof is at a relatively high height from the ground, it is usually necessary to climb onto the roof through a ladder. However, the current ladder has a limited length, and its height from the ground is relatively high, and the lowest end is difficult to reach the height of the footrest, resulting in inconvenience in getting on and off. Summary of the Invention

[0003] The purpose of the present application is to provide a ladder structure and a vehicle to solve the problem that it is inconvenient to get on and off the roof due to the limited length of the ladder.

[0004] A ladder structure, the ladder structure includes a first ladder, a second ladder and a locking device. The first ladder and the second ladder are connected. The first ladder is used to be fixed to the vehicle body, and the second ladder is adapted to move relative to the first ladder under an external force to be in an unfolded state or a stored state; the locking device is arranged on the first ladder, and the locking device is adapted to lock the second ladder in the stored state.

[0005] In one embodiment, the first ladder is rotatably connected to the second ladder.

[0006] In one embodiment, the ladder structure further includes a first connection component, the first connection component is connected to both the first ladder and the second ladder, and provides a first damping force when the second ladder rotates relative to the first ladder to be in an unfolded state.

[0007] In one embodiment, the first connection component provides a second damping force when the second ladder rotates relative to the first ladder to be in a stored state, and the first damping force is greater than the second damping force.

[0008] In one embodiment, the first connection component includes a ratchet wheel, an elastic member and a mating member. The ratchet wheel is fixed to one of the first ladder and the second ladder, an installation hole is formed in the other of the first ladder and the second ladder, one end of the elastic member is fixed in the installation hole, the other end of the elastic member is fixedly connected to the mating member, and the mating member cooperates with the ratchet wheel.

[0009] In one embodiment, a plurality of bevel teeth are provided on the side of the ratchet wheel facing the mounting hole, and the plurality of bevel teeth are arranged circumferentially in sequence around the rotation center of the ratchet wheel; each of the bevel teeth has a bevel and a stop surface, the bevel faces the mounting hole, and the bevel includes a first edge and a second edge opposite to each other in the circumferential direction of the ratchet wheel; along the axial direction of the ratchet wheel, the distance between the first edge and the surface of the ratchet wheel facing away from the bevel is smaller than the distance between the second edge and the surface of the ratchet wheel facing away from the bevel; the bevel is inclined from the one edge to the second edge, and the stop surface is connected to the first edge of one of the bevel surfaces and the second edge of an adjacent one of the bevel surfaces, and the stop surface intersects with the bevel surface.

[0010] In one embodiment, the first ladder has a first limiting surface, and the second ladder has a second limiting surface. The first limiting surface and the second limiting surface cooperate with each other and are used to limit the rotation angle of the second ladder relative to the first ladder.

[0011] In one embodiment, the ladder structure further includes a third ladder, the third ladder is connected to the second ladder, and the third ladder is suitable for sliding relative to the second ladder so that the third ladder is in a deployed state or a semi-deployed state.

[0012] In one embodiment, when the second ladder moves relative to the first ladder and is in the unfolded state, the third ladder can slide relative to the second ladder.

[0013] In one embodiment, one of the second ladder and the third ladder is provided with a receiving cavity, and the receiving cavity is used to accommodate the other of the second ladder and the third ladder.

[0014] In one embodiment, the third ladder is provided with the receiving cavity, and the receiving cavity is used to receive the second ladder. When the third ladder slides relative to the second ladder and is in the deployed state, the second ladder extends out of the receiving cavity. When the third ladder slides relative to the second ladder and is in the semi-deployed state, the second ladder is received in the receiving cavity.

[0015] In one embodiment, the ladder structure further includes a limiter, the limiter is connected to both the second ladder and the third ladder, and the limiter is used to limit the sliding length of the third ladder relative to the second ladder.

[0016] In one embodiment, the limiting member is disposed in the receiving cavity; the limiting member is formed with an oblong through hole extending along the length direction of the limiting member; the ladder structure further includes a fixing member, the fixing member passes through the oblong through hole, and opposite ends of the fixing member are respectively fixed to two opposite side walls of the receiving cavity.

[0017] In one embodiment, two opposite side walls of the receiving cavity are formed with sliding grooves, two opposite sides of the limiting member are formed with convex portions corresponding to the sliding grooves, and the third ladder moves under the action of the convex portions and the sliding grooves.

[0018] In one embodiment, the limiting member is rotatably connected to the second ladder.

[0019] In one embodiment, when the third ladder slides relative to the second ladder to be in the deployed state, the second ladder completely extends out of the receiving cavity, and the third ladder bends relative to the second ladder.

[0020] In one embodiment, the limiting member is formed with an arc-shaped through hole, the ladder structure further includes a positioning member, the positioning member is fixedly connected to the second ladder, a part of the positioning member extends into the arc-shaped through hole, and the positioning member cooperates with the arc-shaped through hole and is used to limit the rotation angle of the second ladder relative to the limiting member.

[0021] In one embodiment, the second ladder has a third limiting surface, the limiting member has a fourth limiting surface, the third limiting surface and the fourth limiting surface cooperate, and are used to limit the rotation angle of the second ladder relative to the limiting member.

[0022] In one embodiment, the fourth limiting surface and the arc-shaped through hole are located at opposite ends in the thickness direction of the limiting member.

[0023] In one embodiment, the vehicle-mounted ladder frame further includes a plurality of buffer members, and the plurality of buffer members are fixedly connected to a side surface of the first ladder facing the vehicle body.

[0024] A vehicle, the vehicle includes a vehicle body and the ladder structure according to any one of the embodiments of the present application, and the first ladder is fixed to the vehicle body.

[0025] By providing the first ladder and the second ladder, and the second ladder can move relative to the first ladder under the action of an external force to be in the deployed state, so that the overall length of the ladder structure is longer, the distance between the ladder structure and the ground is shortened, which is convenient for climbing, and the second ladder can move relative to the first ladder to be in the storage state, and the second ladder is held in the storage state by the locking device, so that the overall ladder structure is small and compact. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0028] Figure 2 It is a three-dimensional structural schematic diagram of a ladder structure in a certain state provided by an embodiment of the present application;

[0029] Figure 3 It is a three-dimensional structural schematic diagram of a ladder structure in another state provided by an embodiment of the present application;

[0030] Figure 4 It is a three-dimensional structural schematic diagram of a first ladder in a certain perspective of a ladder structure provided by an embodiment of the present application;

[0031] Figure 5 It is a three-dimensional structural schematic diagram of a first ladder in another perspective of a ladder structure provided by an embodiment of the present application;

[0032] Figure 6 It is a three-dimensional structural schematic diagram of a ladder structure in yet another state provided by an embodiment of the present application;

[0033] Figure 7 It is a three-dimensional exploded structural schematic diagram of a ladder structure in a certain perspective provided by an embodiment of the present application;

[0034] Figure 8 is Figure 7 A partial three-dimensional exploded structural schematic diagram of the ladder structure shown;

[0035] Figure 9 It is a three-dimensional exploded structural schematic diagram of a ladder structure in another perspective provided by an embodiment of the present application;

[0036] Figure 10 It is a three-dimensional exploded structural schematic diagram of a first connection component in a ladder structure provided by an embodiment of the application;

[0037] Figure 11 It is a partial sectional structural schematic diagram of a ladder structure provided by an embodiment of the application;

[0038] Figure 12 It is a three-dimensional exploded structural schematic diagram of a ladder structure in yet another state provided by an embodiment of the present application;

[0039] Figure 13 It is a three-dimensional structural schematic diagram of a second ladder and a third ladder in a ladder structure provided by an embodiment of the application;

[0040] Figure 14 It is another three-dimensional structure diagram of a vehicle provided by an embodiment of the present application;

[0041] Figure 15 It is a three-dimensional structure diagram of a locking device in a state of a ladder structure provided by an embodiment of the application;

[0042] Figure 16 It is a three-dimensional structure diagram of a locking device in another state of a ladder structure provided by an embodiment of the application;

[0043] Figure 17 It is another three-dimensional structure diagram of a second ladder and a third ladder in a ladder structure provided by an embodiment of the application;

[0044] Figure 18 It is Figure 17 The sectional structure diagram of the second ladder and the third ladder shown along the line XVIII-XVIII;

[0045] Figure 19 It is a three-dimensional structure diagram of a second ladder in a ladder structure provided by an embodiment of the application;

[0046] Figure 20 It is another three-dimensional structure diagram of a vehicle provided by an embodiment of the application;

[0047] Figure 21 It is yet another three-dimensional structure diagram of a vehicle provided by an embodiment of the application;

[0048] Figure 22 It is a sectional structure diagram of a second ladder and a limiting member in a ladder structure provided by an embodiment of the application;

[0049] Figure 23 It is another sectional structure diagram of a second ladder and a limiting member in a ladder structure provided by an embodiment of the application.

[0050] Reference numerals:

[0051] A - First direction, B - Second direction, C - Third direction, D - Fourth direction, 10 - First ladder, 11 - Receiving groove, 12 - First fixing part, 121 - First side wall, 122 - Second side wall, 123 - Bottom wall, 1231 - First limiting surface, 20a - Second ladder, 20b - Third ladder, 21 - First rotating part, 211 - Mounting hole, 212 - Second limiting surface, 221 - Receiving cavity, 222 - Sliding groove, 23 - Limiting part, 231 - Convex part, 232 - Waist-shaped through hole, 233 - Second rotating part, 2331 - Arc-shaped through hole, 2332 - Fourth limiting surface, 24 - Second fixing part, 241 - Third side wall, 242 - Fourth side wall, 243 - Third limiting surface, 30 - First connecting component, 31 - Ratchet wheel, 311 - Central hole, 312 - Helical teeth, 3121 - Inclined surface, 3122 - Stopping surface, 3123 - First edge, 3124 - Second edge, 32 - Elastic part, 33 - Fitting part, 331 - Fitting portion, 3311 - Arc surface, 34 - First rotating shaft, 40 - Cover plate, 41 - Positioning hole, 50 - Pedal, 60 - Locking device, 61 - Lock hook, 62 - Lock catch, 63 - Control switch, 70 - Magnetic part, 80 - Buffer part, 90 - Second connecting component, 91 - Fixing part, 92 - Second rotating shaft, 93 - Positioning part, 100 - Ladder structure, 200 - Vehicle body, 300 - Longitudinal beam, 1000 - Vehicle. Detailed implementation manners

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0053] The descriptions of the following embodiments refer to the attached drawings for illustration of specific embodiments in which the present application can be implemented. The directional terms mentioned herein, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for better and clearer illustration and understanding of the present application, 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 thus should not be construed as a limitation to the present application.

[0054] In addition, the serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).

[0055] Please refer to Figure 1 、 Figure 2 and Figure 3 In this application, a ladder structure 100 is provided. The ladder structure 100 is applied to a vehicle 1000. The ladder structure 100 includes a first ladder 10, a second ladder 20a and a locking device 60. The first ladder 10 is connected to the second ladder 20a. The first ladder 10 is adapted to be fixed to the vehicle body 200 of the vehicle 1000. The second ladder 20a is adapted to move relative to the first ladder 10 under an external force to be in an unfolded state or a retracted state. The locking device 60 is arranged on the first ladder 10, and the locking device 60 is adapted to lock the second ladder 20a in the retracted state.

[0056] By providing the first ladder 10 and the second ladder 20a, and enabling the second ladder 20a to move relative to the first ladder 10 under an external force to be in an unfolded state, the overall length of the ladder structure 100 is longer, the distance between the ladder structure 100 and the ground is shortened, which is convenient for climbing. And the second ladder 20a can move relative to the first ladder 10 to be in a retracted state, and the second ladder 20a is held in the retracted state by the locking device 60, making the ladder structure 100 compact overall.

[0057] Exemplarily, the first ladder 10 and the second ladder 20a are rotatably connected. The second ladder 20a rotates relative to the first ladder 10 in a first direction A to be in an unfolded state, and the second ladder 20a rotates relative to the first ladder 10 in a second direction B to be in a retracted state. The second ladder 20a folds relative to the first ladder 10, and the first direction A and the second direction B are opposite.

[0058] When the second ladder 20a rotates relative to the first ladder 10 in the second direction B, the second ladder 20a folds relative to the first ladder 10 until the second ladder 20a overlaps with the first ladder 10, and the first ladder 10 is in a retracted state. When the second ladder 20a rotates relative to the first ladder 10 in the first direction A until the second ladder 20a cannot rotate, the second ladder 20a unfolds relative to the first ladder 10. As shown in Figure 3 and Figure 6 Specifically, the second ladder 20a is arranged at an angle with the first ladder 10.

[0059] Please refer to Figure 4 and Figure 5, for example, one side of the first ladder 10 is fixedly connected to the top of the vehicle body 200 (such as the longitudinal beam 300 of the luggage rack on the top of the vehicle body 200). The ladder structure 100 further includes a cover plate 40. The cover plate 40 is arranged on the top of the first ladder 10. The cover plate 40 is provided with positioning holes 41, and the longitudinal beam 300 of the luggage rack is provided with mating holes adapted to the positioning holes 41. The top of the first ladder 10 is fixedly connected to the longitudinal beam 300 of the luggage rack by means of bolts passing through the positioning holes 41 and the mating holes.

[0060] Furthermore, a magnetic attraction member 70 (such as a magnet suction cup) is provided at the bottom of the first ladder 10. The bottom of the first ladder 10 is adsorbed on the side wall of the metal vehicle body 200 through the magnetic attraction member 70, replacing the traditional structure of fixing the bottom of the first ladder 10 with bolts, without the need to drill holes in the vehicle body 200 and without damaging the beauty of the vehicle body 200.

[0061] , for example, the ladder structure 100 further includes a plurality of buffer members 80 (such as rubber pads). The plurality of buffer members 80 are fixedly connected to one side of the first ladder 10 facing the vehicle body 200 of the vehicle 1000. The buffer members 80 support on the window glass of the vehicle body 200, and can disperse the pressure generated by the ladder structure 100 on the vehicle body 200 when stepping on the ladder structure 100, avoiding damage to the structure of the vehicle body 200.

[0062] Please refer to Figure 6 and Figure 7 , the ladder structure 100 further includes a first connection assembly 30. The first connection assembly 30 is arranged between the first ladder 10 and the second ladder 20a. The first connection assembly 30 is connected to both the first ladder 10 and the second ladder 20a, and provides a first damping force when the second ladder 20a rotates relative to the first ladder 10 in the first direction A to be in the unfolded state.

[0063] By arranging the first connection assembly 30 between the first ladder 10 and the second ladder 20a, and when the second ladder 20a unfolds relative to the first ladder 10, the first connection assembly 30 provides a first damping force to the second ladder 20a, so that the second ladder 20a can unfold slowly, reducing the damage degree of the second ladder 20a to the ladder structure 100 and / or the vehicle body 200 when unfolding, ensuring the service life of the ladder structure 100 and / or the vehicle body 200, and effectively avoiding injury to the user when the second ladder 20a unfolds relative to the first ladder 10.

[0064] It provides a second damping force when the second ladder 20a rotates relative to the first ladder 10 in the second direction B to be in the retracted state, and the first damping force is greater than the second damping force.

[0065] When the second ladder 20a is folded relative to the first ladder 10, the first connection assembly 30 provides a second damping force to the second ladder 20a, and the first damping force is greater than the second damping force. When the second ladder 20a is unfolded relative to the first ladder 10, there is a greater damping force limit compared to when it is folded, so that the second ladder 20a will not directly and quickly fall and damage the ladder structure 100 and / or the body 200 of the vehicle 1000, ensuring the service life of the ladder structure 100 and / or the body 200, and effectively avoiding injury to the user when the second ladder 20a is unfolded relative to the first ladder 10.

[0066] Please refer to Figure 8 、 Figure 9 and Figure 10 , by way of example, the first connection assembly 30 includes a ratchet 31, an elastic member 32 and a mating member 33. The ratchet 31 is fixed to one of the first ladder 10 and the second ladder 20a. The ratchet 31 is located between the first ladder 10 and the second ladder 20a. An installation hole 211 is formed in the other of the first ladder 10 and the second ladder 20a. One end of the elastic member 32 is fixed in the installation hole 211, and the other end of the elastic member 32 is fixedly connected to the mating member 33. The elastic member 32 is always in a compressed state, and the mating member 33 cooperates with the ratchet 31.

[0067] For example, the ratchet 31 is fixed to the end of the first ladder 10, and an installation hole 211 is formed in the end of the second ladder 20a. Among them, the installation hole 211 is a blind hole. One end of the elastic member 32 is fixed to the side wall of the installation hole 211, and the other end of the elastic member 32 is fixed to the mating member 33. The mating member 33 always abuts against the side surface of the ratchet 31 facing the second ladder 20a. Among them, the elastic member 32 is always in an elastically compressed state, and the elastic member 32 always exerts a thrust on the mating member 33. When the second ladder 20a rotates relative to the first ladder 10 in the first direction A, the mating member 33 and the elastic member 32 rotate with the second ladder 20a. During the rotation process, the mating member 33 will exert a pressure on the elastic member 32 due to the action of the ratchet 31, so that the elastic member 32 is further compressed, making the damping force relatively larger when the second ladder 20a rotates in the first direction A, so that the second ladder 20a slowly unfolds under the action of its own gravity and the first damping force.

[0068] For example, a plurality of bevel teeth 312 are provided on one side of the ratchet 31 facing the second ladder 20a. The plurality of bevel teeth 312 are arranged circumferentially around the rotation center of the ratchet 31. Each bevel tooth 312 has a bevel surface 3121 and a stop surface 3122. The bevel surface 3121 faces the mounting hole 211. The bevel surface 3121 includes a first edge 3123 and a second edge 3124 that are opposite to each other in the circumferential direction of the ratchet 31. In the axial direction of the ratchet 31, the first edge 312 3 to the surface of the ratchet 31 away from the inclined surface 3121 is smaller than the distance between the second edge 3124 and the surface of the ratchet 31 away from the inclined surface 3121; the inclined surface 3121 is inclined from the first edge 3123 to the second edge 3124, the stop surface 3122 is connected to the first edge 3123 of the inclined surface 3121 and the second edge 3124 of the adjacent inclined surface 3121, and the stop surface 3122 intersects with the inclined surface 3121.

[0069] Specifically, the stop surface 3122 is connected to a first edge 3123 of an inclined surface 3121 and a second edge 3124 on an adjacent inclined surface 3121 close to the first edge 3123 , and the stop surface 3122 may be parallel to the axial direction of the ratchet 31 .

[0070] Among them, the ratchet 31 is a circular ring structure, and the ratchet 31 is formed with a center hole 311. The axis of the center hole 311 is colinear with the axis of the mounting hole 211. In the axial direction of the center hole 311, the bevel teeth 312, the fitting 33, the elastic part 32 and the end of the second ladder 20a are arranged in sequence, and the fitting 33 abuts against the inclined surface 3121.

[0071] The inclined surface 3121 is inclined in the circumferential direction, and the stop surface 3122 is connected to the end of the inclined surface 3121 in the circumferential direction.

[0072] The second edges 3124 of the plurality of inclined surfaces 3121 are located at the same height in the axial direction of the central hole 311 , and the first edges 3123 of the plurality of inclined surfaces 3121 are located at the same height in the axial direction of the central hole 311 .

[0073] When the second ladder 20a rotates relative to the first ladder 10 in the first direction A, the matching member 33 slides from one inclined surface 3121 along the stop surface 3122 to the first edge 3123 on the other inclined surface 3121 connected to the stop surface 3122. During this process, the elastic member 32 provides a first damping force to the second ladder 20a.

[0074] When the second ladder 20a rotates relative to the first ladder 10 in the second direction B, the fitting 33 directly slides from the first edge 3123 of one inclined surface 3121 to another adjacent inclined surface 3121 in the second direction B. During this process, the fitting 33 is not restricted by the stop surface 3122. Therefore, the elastic member 32 provides a second damping force to the second ladder 20a, and the second damping force is less than the first damping force, making it easier to fold the second ladder 20a.

[0075] Exemplarily, the end of the fitting 33 facing the ratchet 31 is provided with a fitting portion 331. The fitting portion 331 faces the helical teeth 312, and the fitting portion 331 has an arc surface 3311, and the arc surface 3311 is the peripheral surface of the fitting portion 331.

[0076] The fitting portion 331 is a hemispherical structure. The fitting portion 331 is provided at the end of the fitting 33. In the axial direction of the central hole 311, the fitting portion 331 faces the helical teeth 312, and the fitting portion 331 abuts against the inclined surface 3121.

[0077] When the second ladder 20a rotates relative to the first ladder 10 in the first direction A, under the action of the elastic member 32 and the arc surface 3311, the fitting portion 331 rotates from the inclined surface 3121 of one helical tooth 312, through the stop surface 3122 of an adjacent helical tooth 312 to the inclined surface 3121 of an adjacent helical tooth 312. The fitting 33 and the elastic member 32 provide a first damping force to the second ladder 20a; when the second ladder 20a rotates relative to the first ladder 10 in the second direction B, under the action of the elastic member 32 and the arc surface 3311, the fitting portion 331 rotates from the inclined surface 3121 of one helical tooth 312 to the inclined surface 3121 of an adjacent helical tooth 312, and the fitting 33 and the elastic member 32 provide a second damping force to the second ladder 20a.

[0078] By providing the arc surface 3311, when the second ladder 20a rotates relative to the first ladder 10 in the first direction A, the arc surface 3311 of the fitting portion 331 is more likely to slide along the stop surface 3122 to the highest point of an adjacent inclined surface 3121 under the action of the elastic member 32 and the inclined surface 3121.

[0079] The first ladder 10 includes a first fixing portion 12. The first fixing portion 12 is located at the end of the first ladder 10. The first fixing portion 12 includes opposite first side walls 121 and second side walls 122. The ratchet 31 is fixed to the first side wall 121. The second ladder 20a includes a first rotating portion 21. The first rotating portion 21 is located at the end of the second ladder 20a. The first rotating portion 21 is located between the first side wall 121 and the second side wall 122; the first connection assembly 30 further includes a first rotating shaft 34. The first rotating shaft 34 sequentially passes through the first side wall 121, the first rotating portion 21, the ratchet 31 and the second side wall 122, and the first rotating portion 21 rotates around the first rotating shaft 34 in the first direction A or the second direction B.

[0080] The two ends of the first rotating shaft 34 are respectively fixed on the first side wall 121 and the second side wall 122 . The mounting hole 211 is provided on the first rotating portion 21 .

[0081] During the rotation of the second ladder 20 a , the ratchet 31 is always in a stationary state, and the matching piece 33 rotates along the helical teeth 312 of the ratchet 31 driven by the first rotating portion 21 .

[0082] Please combine Figure 11 For example, the first ladder 10 has a first limiting surface 1231, and the second ladder 20a has a second limiting surface 212. The first limiting surface 1231 cooperates with the second limiting surface 212 and is used to limit the rotation angle of the second ladder 20a relative to the first ladder 10.

[0083] Specifically, the bottom wall 123 of the first fixed portion 12 has a first limiting surface 1231, and the first rotating portion 21 has a second limiting surface 212. During the process of switching the second ladder 20a from the stored state to the deployed state, the first rotating portion 21 rotates in the first direction A relative to the first fixed portion 12. When the second ladder 20a is in the deployed state, the first limiting surface 1231 overlaps with the second limiting surface 212. During the process of switching the second ladder 20a from the deployed state to the stored state, the first rotating portion 21 rotates in the second direction B relative to the first fixed portion 12. When the second ladder 20a is in the stored state, the first limiting surface 1231 is opposite to the second limiting surface 212.

[0084] The first limiting surface 1231 is located at a position of the end of the first fixing portion 12 close to the bottom wall 123 of the first fixing portion 12; when the second ladder 20a is in the retracted state, the second limiting surface 212 is opposite to the first limiting surface 1231; when the second ladder 20a is in the unfolded state, the second limiting surface 212 overlaps with the first limiting surface 1231.

[0085] By setting the first limiting surface 1231 and the second limiting surface 212, when the second ladder 20a rotates to the second state in the first direction A relative to the first ladder 10, the second limiting surface 212 overlaps with the first limiting surface 1231 to limit the second ladder 20a from continuing to rotate, thereby realizing the stepping limiting function of the ladder structure 100.

[0086] See also Figure 3 and Figure 12 The ladder structure 100 further includes a third ladder 20b, the second ladder 20a is connected to the third ladder 20b, and the third ladder 20b slides relative to the second ladder 20a so that the third ladder 20b is in a deployed state or a semi-deployed state.

[0087] Among them, when the second ladder 20a moves relative to the first ladder 10 to be in the deployed state, the third ladder 20b can slide relative to the second ladder 20a so that the third ladder 20b is in the deployed state or the semi-deployed state. Among them, when the third ladder 20b is in the semi-deployed state, the second ladder 20a is in the deployed state, as Figure 6 shown.

[0088] The setting of the third ladder 20b makes the distance between the ladder structure 100 and the ground shorten when the second ladder 20a is in the deployed state and the third ladder 20b is in the deployed state, as Figure 12 shown, which is convenient for climbing.

[0089] One of the second ladder 20a and the third ladder 20b is provided with a receiving cavity 221, and the receiving cavity 221 is used to accommodate the other of the second ladder 20a and the third ladder 20b. For example, the second ladder 20a is provided with a receiving cavity 221, and the receiving cavity 221 is used to accommodate the third ladder 20b; also for example, the third ladder 20b is provided with a receiving cavity 221, and the receiving cavity 221 is used to accommodate the second ladder 20a.

[0090] Please refer to Figure 13 , for example, the third ladder 20b is provided with a receiving cavity 221, the receiving cavity 221 is used to receive the second ladder 20a. When the third ladder 20b slides relative to the second ladder 20a to be in the deployed state, the second ladder 20a extends out of the receiving cavity 221. When the third ladder 20b slides relative to the second ladder 20a to be in the semi-deployed state, the second ladder 20a is accommodated in the receiving cavity 221.

[0091] When the second ladder 20a is in the retracted state, the second ladder 20a is accommodated in the receiving cavity 221, as Figure 6 shown.

[0092] It can be understood that the third ladder 20b also has a retracted state. The third ladder 20b can move relative to the first ladder 10 to switch from the retracted state to the semi-deployed state, where the second ladder 20a is in the deployed state, as Figure 6 shown; then the third ladder 20b slides relative to the second ladder 20a in the deployed state to switch from the semi-deployed state to the deployed state, as Figure 12 shown. When folding the ladder structure 100, the third ladder 20b slides relative to the second ladder 20a to switch from the deployed state to the semi-deployed state, and the third ladder 20b and the second ladder 20a as a whole move relative to the first ladder 10, so that both the second ladder 20a and the third ladder 20b are in the retracted state, as Figure 2 shown.

[0093] Please refer to Figure 14, For example, on one side of the first ladder 10 facing away from the vehicle body 200, there is a receiving groove 11 for receiving the third ladder 20b. When both the second ladder 20a and the third ladder 20b are in the stored state, the third ladder 20b is received in the receiving groove 11, making the overall ladder structure 100 compact.

[0094] Both the first ladder 10 and the third ladder 20b are provided with pedals 50 for the users to step on.

[0095] Please refer to Figure 14 , Figure 15 and Figure 16 , The locking device 60 includes a locking hook 61, a locking buckle 62 and a control switch 63. The locking hook 61 is provided at a position near the top of the first ladder 10, and the locking buckle 62 that is locked with the locking hook 61 is provided on the third ladder 20b. The control switch 63 may be provided on the third ladder 20b. When the ladder structure 100 is in the fully folded state, the control switch 63 is provided on the side of the third ladder 20b facing away from the vehicle body 200. By pressing the control switch 63, the locking hook 61 can be disengaged from the locking buckle 62, and the third ladder 20b and the second ladder 20a as a whole slowly move under their own gravity and the first damping force provided by the first connection assembly 30 to a state where the third ladder 20b is in a semi-expanded state; when the second ladder 20a and the third ladder 20b as a whole rotate relative to the first ladder 10 in the second direction B into the receiving groove 11, the locking hook 61 is locked with the locking buckle 62 to fix the third ladder 20b in the receiving groove 11 of the first ladder 10.

[0096] Optionally, after the third ladder 20b is locked with the first ladder 10, the locking hook 61 can be disengaged from the locking buckle 62 through intelligent control. Or the third ladder 20b can be rotated relative to the first ladder 10 in the second direction B through intelligent control so that the third ladder 20b is locked in the receiving groove 11 of the first ladder 10.

[0097] Please refer to Figure 13 , Figure 17 and Figure 18 , For example, the ladder structure 100 further includes a limiting member 23 connected to both the second ladder 20a and the third ladder 20b, and the limiting member 23 is used to limit the sliding length of the third ladder 20b relative to the second ladder 20a.

[0098] The limiting member 23 is rotatably connected to one end of the second ladder 20a, and the other end of the second ladder 20a is rotatably connected to the first ladder 10. The second ladder 20a is located between the limiting member 23 and the first ladder 10.

[0099] The receiving cavity 221 is used to receive the limiting member 23 and the second ladder 20a.

[0100] Exemplarily, the limiting member 23 is formed with an oblong through-hole 232 extending along the length direction of the limiting member 23 (such as Figure 18 the third direction C shown), the ladder structure 100 further includes a second connecting component 90, the second connecting component 90 includes a fixing member 91, the fixing member 91 passes through the oblong through-hole 232, and the opposite ends of the fixing member 91 are respectively fixed to two opposite side walls of the receiving cavity 221, and the sliding stroke of the third ladder 20b is equal to the extending length of the oblong through-hole 232.

[0101] In this application, since the first rotating portion 21 at one end of the second ladder 20a is rotatably connected to the first fixing portion 12 of the first ladder 10, and the other end of the second ladder 20a is rotatably connected to one end of the limiting member 23, therefore, in the length direction of the third ladder 20b, actually, the third ladder 20b displaces relative to the second ladder 20a and the limiting member 23 under the action of its own gravity.

[0102] It can be understood that the moving stroke of the second ladder 20a in the receiving cavity 221 is actually the extending length of the oblong through-hole 232.

[0103] The oblong through-hole 232 is a through-hole provided in the width direction of the limiting member 23 (such as Figure 18 the fourth direction D shown), the two open ends of the oblong through-hole 232 respectively face two side walls of the third ladder 20b in the width direction (the width direction of the third ladder 20b is the same as the width direction of the limiting member 23), the fixing member 91 sequentially passes through one side wall of the third ladder 20b, the oblong through-hole 232 and the other side wall of the third ladder 20b, and both ends of the fixing member 91 are fixed on the side wall of the third ladder 20b, that is, the fixing member 91 is fixed relative to the third ladder 20b and does not move.

[0104] Chutes 222 are formed on two opposite side walls of the receiving cavity 221, convex portions 231 corresponding to the chutes 222 are formed on two opposite sides of the limiting member 23, and the third ladder 20b moves under the action of the convex portions 231 and the chutes 222.

[0105] The convex portions 231 extend into the chutes 222, and the convex portions 231 cooperate with the chutes 222, so that the third ladder 20b slides smoothly under the limitation of the convex portions 231 and the chutes 222.

[0106] When the third ladder 20b slides under the limitation of the chutes 222 and the convex portions 231 until the fixing member 91 abuts against the two side walls at both ends of the oblong through-hole 232 in the length direction of the limiting member 23, the third ladder 20b stops moving.

[0107] When the third ladder 20b is in the semi-expanded state, the fixing member 91 abuts against the side wall of the waist-shaped through hole 232 closer to the second ladder 20a, and the second ladder 20a is received in the receiving cavity 221; when the third ladder 20b is in the deployed state, the fixing member 91 abuts against the side wall of the waist-shaped through hole 232 away from the second ladder 20a, and the second ladder 20a extends out of the receiving cavity 221.

[0108] Wherein, in any state of the ladder structure 100, the limiting member 23 is always located in the receiving cavity 221. When the third ladder 20b is stepped on, the limiting member 23 plays a role in supporting the third ladder 20b, which can enhance the structural strength of the third ladder 20b. When the ladder structure 100 is in the semi-expanded state (i.e., the third ladder 20b is in the semi-expanded state), the fixing member 91 abuts against one side wall of the waist-shaped through hole 232 closer to the first ladder 10. At this time, a stop structure can be arranged in the receiving cavity 221 to prevent the third ladder 20b from moving along its length direction under its own gravity, so that the third ladder 20b can be kept in the semi-expanded state.

[0109] In this application, no stop structure is provided between the third ladder 20b and the limiting member 23, or between the third ladder 20b and the second ladder 20a. After the second ladder 20a and the third ladder 20b as a whole rotate relative to the first ladder 10 in the first direction A to the state where the third ladder 20b is in the semi-expanded state and the second ladder 20a is in the expanded state, that is, during the process of the third ladder 20b sliding relative to the second ladder 20a to be in the deployed state, the third ladder 20b automatically moves downward under its own gravity, the second ladder 20a completely extends out of the receiving cavity 221, and the third ladder 20b bends relative to the second ladder 20a.

[0110] Please refer to Figure 17 , by arranging the second ladder 20a between the limiting member 23 and the first ladder 10, after the third ladder 20b slides downward under its own gravity, the distance between the third ladder 20b and the vehicle body 200 is shortened, and the third ladder 20b is more vertical, which is convenient for stepping on the pedal 50 on the third ladder 20b.

[0111] Please refer to Figure 19 , exemplarily, the limiting member 23 includes a second rotating portion 233, the second ladder 20a includes a second fixing portion 24, the second fixing portion 24 includes opposite third side walls 241 and fourth side walls 242, the second rotating portion 233 is arranged between the third side wall 241 and the fourth side wall 242, the second connecting assembly 90 further includes a second rotating shaft 92, the second rotating shaft 92 sequentially passes through the third side wall 241, the second rotating portion 233 and the fourth side wall 242, and the second rotating portion 233 rotates around the second rotating shaft 92 in the first direction A or the second direction B.

[0112] When the second ladder 20a is in the deployed state and the third ladder 20b slides relative to the second ladder 20a to the deployed state, the second ladder 20a and the second rotating part 233 completely extend out of the receiving cavity 221, and both the limiting part 23 and the third ladder 20b are bent relative to the second ladder 20a.

[0113] The second rotating part 233 extends out of the receiving cavity 221 so that the second rotating part 233 can rotate relative to the second fixed part 24.

[0114] Wherein, both ends of the second rotating shaft 92 are respectively fixed on the third side wall 241 and the fourth side wall 242.

[0115] Please refer to Figure 20 and Figure 21 . During the process of the third ladder 20b being converted from the semi-deployed state to the deployed state, the second rotating part 233 rotates relative to the second fixed part 24 around the second rotating shaft 92 in the first direction A. Since the limiting part 23 is received in the receiving cavity 221, the third ladder 20b rotates relative to the second ladder 20a towards the side where the vehicle body 200 is located. The third ladder 20b in the deployed state is closer to the vehicle body 200 than the third ladder 20b in the semi-deployed state, so that the third ladder 20b is more vertical, facilitating the user to step on. During the process of the third ladder 20b being converted from the deployed state to the semi-deployed state, the second rotating part 233 rotates relative to the second fixed part 24 around the second rotating shaft 92 in the second direction B, and the third ladder 20b rotates relative to the second ladder 20a in the direction away from the vehicle body 200. The third ladder 20b in the semi-deployed state is on the same straight line as the second ladder 20a, as shown in Figure 13 and Figure 14 .

[0116] It can be understood that the numbers of the second ladder 20a, the limiting part 23, and the third ladder 20b are all two. Each second ladder 20a is provided with a second fixed part 24, and each limiting part 23 includes a second rotating part 233.

[0117] Please refer to Figure 22 and Figure 23 . By way of example, the second rotating part 233 is formed with an arc-shaped through hole 2331. The second connecting assembly 90 further includes a positioning part 93. The positioning part 93 is fixedly connected to the second ladder 20a. The positioning part 93 partially extends into the arc-shaped through hole 2331. The positioning part 93 cooperates with the arc-shaped through hole 2331 and is used to limit the rotation angle of the second ladder 20a relative to the limiting part 23.

[0118] Wherein, one end of the positioning part 93 is fixedly connected to the third side wall 241, and the rotation stroke of the second rotating part 233 relative to the second fixed part 24 is equal to the arc length of the arc-shaped through hole 2331.

[0119] By providing the positioning member 93 and the arc-shaped through hole 2331, the rotation range of the second rotating portion 233 is restricted. Since the second rotating portion 233 is fixedly connected to the second ladder 20a, the rotation range of the second ladder 20a relative to the limiting member 23 is restricted. Moreover, the limiting member 23 is always received in the receiving cavity 221 of the third ladder 20b, which can effectively prevent the third ladder 20b from colliding with the vehicle body 200 during rotation and prevent damage to the third ladder 20b and / or the vehicle body 200.

[0120] Exemplarily, the second ladder 20a has a third limiting surface 243, and the limiting member 23 has a fourth limiting surface 2332. The third limiting surface 243 and the fourth limiting surface 2332 cooperate to define the rotation angle of the second ladder 20a relative to the limiting member 23.

[0121] Specifically, the third limiting surface 243 is provided on the second fixing portion 24, and the fourth limiting surface 2332 is provided on the second rotating portion 233. When the third ladder 20b is in the deployed state, the third limiting surface 243 overlaps with the fourth limiting surface 2332.

[0122] The third limiting surface 243 is located at a position on the second fixing portion 24 close to the end of the second fixing portion 24. When the third ladder 20b is in the deployed state, the third limiting surface 243 overlaps with the fourth limiting surface 2332 to further restrict the continuous rotation of the second ladder 20a and achieve the function of limiting the stepping on the third ladder 20b.

[0123] It can be understood that after the third limiting surface 243 and the fourth limiting surface 2332 are in abutting overlap, the positioning member 93 abuts against the side wall at one end of the arc-shaped through hole 2331 in the arc length direction. Through the limitation of the third limiting surface 243 and the fourth limiting surface 2332, and the limitation of the positioning member 93 and the arc-shaped through hole 2331, the function of limiting the stepping on the third ladder 20b is strengthened.

[0124] The fourth limiting surface 2332 and the arc-shaped through hole 2331 are located at opposite ends in the thickness direction of the limiting member 23 to better improve the stability of the limitation.

[0125] Optionally, the second connection assembly 90 may include a ratchet 31, an elastic member 32 and a mating member 33. The specific structure may be the same as that of the ratchet 31, the elastic member 32 and the mating member 33 of the first connection assembly 30, and the connection method and the mating method are similar. By providing the ratchet 31, the elastic member 32 and the mating member 33 between the second rotating portion 233 and the second fixing portion 24, the third ladder 20b can rotate slowly when rotating under its own gravity in the first direction A.

[0126] Optionally, the first rotating part 21 may also be formed with an arc-shaped through hole 2331. The first connecting component 30 may include a positioning member 93. One end of the positioning member 93 is fixedly connected to the second side wall 122. The positioning member 93 partially extends into the arc-shaped through hole 2331. The stroke of the relative rotation of the first rotating part 21 with respect to the first fixed part 12 is equal to the arc length of the arc-shaped through hole 2331. By providing the positioning member 93 on the first rotating part 21 and the arc-shaped through hole 2331 on the first fixed part 12, the rotation range of the first rotating part 21 is limited, preventing the second ladder 20a from colliding with the vehicle body 200 during rotation and preventing damage to the second ladder 20a and / or the vehicle body 200. Moreover, through the limitation of the first limiting surface 1231 and the second limiting surface 212, as well as the limitation of the positioning member 93 and the arc-shaped through hole 2331 between the first ladder 10 and the second ladder 20a, the supporting and limiting effect on the second ladder 20a is strengthened.

[0127] Optionally, the second ladder 20a and the limiting member 23 may be received in the first ladder 10, and the limiting member 23 is always received in the first ladder 10. The third ladder 20b can rotate relative to the first ladder 10. When the third ladder 20b rotates relative to the first ladder 10 in the first direction A to a semi-expanded state (as Figure 6 shown), the second ladder 20a and the limiting member 23 can slide relative to the first ladder 10 until the second ladder 20a extends out of the first ladder 10 (as Figure 3 shown). After the second ladder 20a extends out of the first ladder 10, the third ladder 20b rotates relative to the second ladder 20a in the first direction A under its own gravity, so that the third ladder 20b is in a deployed state. Since a pedal 50 needs to be provided on the third ladder 20b and its weight is heavier than that of the second ladder 20a, a ratchet 31, an elastic member 32 and a mating member 33 can be provided in the second connecting component 90 between the third ladder 20b and the second ladder 20a, so that the third ladder 20b can rotate slowly.

[0128] In this application, through the structure of three-stage folding and sliding, it is ensured that the ladder structure 100 can climb onto the roof with a small occupied volume. The first fixed part 12, the first rotating part 21, the second fixed part 24, the second rotating part 233, the first connecting component 30 and the second connecting component 90 in the ladder structure 100 are simple to implement, greatly reducing the production and manufacturing costs.

[0129] The above are some embodiments of this application. It should be noted that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of this application.

Claims

1. A ladder structure, It is characterized in that include: a first ladder and a second ladder, the first ladder and the second ladder are connected, the first ladder is used to be fixed to the body of the vehicle, and the second ladder is suitable for moving relative to the first ladder under the action of an external force to be in an extended state or a retracted state; A locking device is provided on the first ladder and is suitable for locking the second ladder in the stored state.

2. The ladder structure according to claim 1, It is characterized in that The first ladder is rotatably connected to the second ladder.

3. The ladder structure according to claim 2, It is characterized in that The ladder structure further includes a first connecting assembly, which is connected to both the first ladder and the second ladder and provides a first damping force when the second ladder rotates relative to the first ladder to be in an unfolded state.

4. The ladder structure according to claim 3, It is characterized in that The first connecting assembly provides a second damping force when the second ladder rotates relative to the first ladder to be in a stowed state, and the first damping force is greater than the second damping force.

5. The ladder structure according to claim 3, It is characterized in that The first connecting assembly includes a ratchet, an elastic member and a mating member, the ratchet is fixed to one of the first ladder and the second ladder, the other of the first ladder and the second ladder is formed with a mounting hole, one end of the elastic member is fixed in the mounting hole, and the other end of the elastic member is fixedly connected to the mating member so that the end of the mating member is mated with the ratchet.

6. The ladder structure according to claim 5, It is characterized in that A plurality of bevel teeth are provided on the side of the ratchet wheel facing the mounting hole, and the plurality of bevel teeth are arranged circumferentially in sequence around the rotation center of the ratchet wheel; each of the bevel teeth has a bevel and a stop surface, the bevel faces the mounting hole, and the bevel includes a first edge and a second edge opposite to each other in the circumferential direction of the ratchet wheel; along the axial direction of the ratchet wheel, the distance between the first edge and the surface of the ratchet wheel facing away from the bevel is smaller than the distance between the second edge and the surface of the ratchet wheel facing away from the bevel; the bevel wheel is inclined from the one edge to the second edge, and the stop surface is connected to the first edge of one bevel and the second edge of an adjacent bevel, and the stop surface intersects with the bevel.

7. The ladder structure according to claim 1, It is characterized in that The first ladder has a first limiting surface, and the second ladder has a second limiting surface. The first limiting surface and the second limiting surface cooperate with each other and are used to limit the rotation angle of the second ladder relative to the first ladder.

8. The ladder structure according to claim 1, It is characterized in that The ladder structure further includes a third ladder connected to the second ladder, and the third ladder is suitable for sliding relative to the second ladder so that the third ladder is in a deployed state or a semi-deployed state.

9. The ladder structure according to claim 8, It is characterized in that When the second ladder moves relative to the first ladder and is in the deployed state, the third ladder can slide relative to the second ladder.

10. The ladder structure according to claim 8, wherein, one of the second ladder and the third ladder is provided with a receiving cavity for receiving the other of the second ladder and the third ladder.

11. The ladder structure according to claim 10, wherein, the third ladder is provided with the receiving cavity for receiving the second ladder. When the third ladder slides relative to the second ladder and is in the deployed state, the second ladder extends out of the receiving cavity. When the third ladder slides relative to the second ladder and is in the semi-deployed state, the second ladder is received in the receiving cavity.

12. The ladder structure according to claim 11, wherein, the ladder structure further includes a limiting member connected to both the second ladder and the third ladder, and the limiting member is used to limit the sliding length of the third ladder relative to the second ladder.

13. The ladder structure according to claim 12, wherein, the limiting member is disposed in the receiving cavity; the limiting member is formed with a kidney-shaped through hole extending along the length direction of the limiting member; the ladder structure further includes a fixing member passing through the kidney-shaped through hole, and opposite ends of the fixing member are respectively fixed to opposite side walls of the receiving cavity.

14. The ladder structure according to claim 12, wherein, opposite side walls of the receiving cavity are formed with sliding grooves, and opposite sides of the limiting member are formed with convex portions corresponding to the sliding grooves, and the third ladder moves under the action of the convex portions and the sliding grooves.

15. The ladder structure according to claim 12, wherein, the limiting member is rotatably connected to the second ladder.

16. The ladder structure according to claim 11, wherein, when the third ladder slides relative to the second ladder to be in the deployed state, the second ladder completely extends out of the receiving cavity, and the third ladder bends relative to the second ladder.

17. The ladder structure according to claim 12, wherein, the limiting member is formed with an arc-shaped through hole, and the ladder structure further includes a positioning member fixedly connected to the second ladder, and the positioning member partially extends into the arc-shaped through hole, and the positioning member cooperates with the arc-shaped through hole and is used to limit the rotation angle of the second ladder relative to the limiting member.

18. The ladder structure according to claim 17, wherein, the second ladder has a third limiting surface, and the limiting member has a fourth limiting surface, and the third limiting surface and the fourth limiting surface cooperate to limit the rotation angle of the second ladder relative to the limiting member.

19. The ladder structure according to claim 18, wherein, the fourth limiting surface and the arc-shaped through hole are located at opposite ends in the thickness direction of the limiting member.

20. The ladder structure according to claim 1, wherein, The ladder structure further includes a plurality of buffer members, and the plurality of buffer members are fixedly connected to a side surface of the first ladder facing the vehicle body.

21. A vehicle, characterized in that it includes: a vehicle body; the vehicle-mounted ladder frame according to any one of claims 1-20, wherein the first ladder is fixed to the vehicle body.

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