Crawling ladder structure and vehicle

Abstract

A ladder structure and a vehicle; the ladder structure comprises a first ladder, a second ladder and a locking device, the first ladder and the second ladder are connected, the first ladder is used for being fixed to a vehicle body of the vehicle, and the second ladder is adapted to move relative to the first ladder under the action of an external force to be in an unfolded state or a storage state; the locking device is arranged on the first ladder, and the locking device is adapted to constitute locking of the second ladder in the storage state; by arranging the first ladder and the second ladder and enabling the second ladder to move relative to the first ladder under the action of the external force to be in the unfolded state, the overall length of the ladder structure is relatively long, the distance between the ladder structure and the ground is shortened, the climbing is facilitated, the second ladder can move relative to the first ladder to be in the storage state, and the second ladder is kept in the storage state by the locking device, so that the overall ladder structure is compact.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a ladder structure and vehicle. Background Technology

[0002] Ladders can be used in various aspects of vehicles, such as roof racks. Because the roof is quite high off the ground, it is usually necessary to climb onto it using a ladder. However, current ladders are limited in length and height, and the lowest point is not high enough to reach the footrests, making it inconvenient to go up and down. Summary of the Invention

[0003] The purpose of this application is to provide a ladder structure and vehicle to solve the problem of inconvenience in getting on and off the vehicle roof due to the limited length of the ladder.

[0004] A 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 fix to the body of a vehicle. The second ladder is adapted to move relative to the first ladder under the action of an external force to be in an unfolded state or a retracted state. The locking device is disposed on the first ladder and is adapted to lock the second ladder in the retracted state.

[0005] In one embodiment, the first ladder and the second ladder are rotatably connected.

[0006] In one embodiment, the ladder structure further includes a first connecting component, 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 extended state.

[0007] In one embodiment, the first connecting component provides a second damping force when the second ladder rotates relative to the first ladder to a retracted state, the first damping force being greater than the second damping force.

[0008] In one embodiment, the first connecting assembly includes a ratchet, an elastic element, and a mating element. The ratchet is fixed to one of the first ladder and the second ladder. The other of the first ladder and the second ladder has a mounting hole. One end of the elastic element is fixed in the mounting hole, and the other end of the elastic element is fixedly connected to the mating element. The mating element engages with the ratchet.

[0009] In one embodiment, the ratchet has a plurality of helical teeth on the side facing the mounting hole, and the plurality of helical teeth are arranged circumferentially around the rotation center of the ratchet; each helical tooth has an inclined surface and a stop surface, the inclined surface facing the mounting hole, the inclined surface including a first edge and a second edge opposite to each other on the circumference of the ratchet; along the axial direction of the ratchet, the distance between the first edge and the surface of the ratchet opposite the inclined surface is less than the distance between the second edge and the surface of the ratchet opposite the inclined surface; the inclined surface is inclined from the first edge to the second edge, and the stop surface connects the first edge of one inclined surface and the second edge of an adjacent inclined surface, and the stop surface intersects with the inclined 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 to limit the angle of rotation of the second ladder relative to the first ladder.

[0011] In one embodiment, the ladder structure further includes a third ladder connected to the second ladder, the third ladder being adapted to slide 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 is in the unfolded state relative to the first ladder, 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 for accommodating the other of the second ladder and the third ladder.

[0014] In one embodiment, the third ladder is provided with the receiving cavity for accommodating the second ladder. When the third ladder is in the deployed state relative to the second ladder, the second ladder extends out of the receiving cavity. When the third ladder is in the semi-deployed state relative to the second ladder, the second ladder is accommodated within the receiving cavity.

[0015] In one embodiment, the ladder structure further includes a limiting member, which is connected to both the second ladder and the third ladder, and is used to limit the length by which the third ladder slides relative to the second ladder.

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

[0017] In one embodiment, the receiving cavity has two opposite sidewalls with grooves, and the limiting member has protrusions on opposite sides corresponding to the grooves. The third ladder moves under the action of the protrusions and the grooves.

[0018] In one embodiment, the limiting member and the second ladder are rotatably connected.

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

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

[0021] In one embodiment, the second ladder has a third limiting surface, and the limiting member has a fourth limiting surface. The third limiting surface and the fourth limiting surface cooperate to limit the angle of rotation 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 ladder structure further includes a plurality of buffer members, which are fixedly connected to one side of the first ladder facing the vehicle body.

[0024] A vehicle comprising a body and a ladder structure as described in any embodiment of this application, wherein the first ladder is fixed to the body.

[0025] By setting up a first ladder and a second ladder, and allowing the second ladder to move relative to the first ladder under external force to be in an unfolded state, the overall length of the ladder structure is longer, shortening the distance between the ladder structure and the ground, making it easier to climb. The second ladder can also move relative to the first ladder to be in a retracted state, and a locking device keeps the second ladder in the retracted state, making the overall ladder structure compact. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0027] Figure 1 This is a three-dimensional structural diagram of a vehicle provided in an embodiment of this application;

[0028] Figure 2 This is a three-dimensional structural diagram of a ladder structure in one state, provided by an embodiment of this application;

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

[0030] Figure 4 This is a three-dimensional structural diagram of a first ladder from one perspective in a ladder structure provided in an embodiment of this application;

[0031] Figure 5 This is a three-dimensional structural diagram of the first ladder from another perspective in a ladder structure provided in an embodiment of this application;

[0032] Figure 6 This is a three-dimensional structural diagram of a ladder structure in another state provided by the embodiments of this application;

[0033] Figure 7 This is a three-dimensional exploded structural diagram of a ladder structure provided in an embodiment of this application;

[0034] Figure 8 yes Figure 7 A partial three-dimensional exploded structural diagram of a ladder structure is shown.

[0035] Figure 9 This is a three-dimensional exploded structural diagram of a ladder structure provided in an embodiment of this application from another perspective;

[0036] Figure 10 This is a three-dimensional exploded structural diagram of the first connecting component in a ladder structure provided in the application implementation method;

[0037] Figure 11 This is a partial cross-sectional structural diagram of a ladder structure provided in the application implementation method;

[0038] Figure 12 This is a three-dimensional exploded structural diagram of a ladder structure in another state provided in the embodiments of this application;

[0039] Figure 13 This is a three-dimensional structural diagram of the second and third ladders in a ladder structure provided in the application implementation method;

[0040] Figure 14 This is another three-dimensional structural schematic diagram of a vehicle provided in an embodiment of this application;

[0041] Figure 15 This is a three-dimensional structural diagram of a locking device in one state of a ladder structure provided in the application embodiment;

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

[0043] Figure 17 This is a three-dimensional structural diagram of the second and third ladders in a ladder structure provided in the application implementation method;

[0044] Figure 18 yes Figure 17 A schematic diagram of the cross-sectional structure of the second and third ladders along line XVIII-XVIII;

[0045] Figure 19 This is a three-dimensional structural diagram of the second ladder in a ladder structure provided in the application implementation method;

[0046] Figure 20 This is another three-dimensional structural schematic diagram of a vehicle provided in the application implementation method;

[0047] Figure 21 This is a three-dimensional structural schematic diagram of a vehicle provided in the application implementation method;

[0048] Figure 22 This is a cross-sectional structural diagram of the second ladder and the limiting member in a ladder structure provided in the application implementation method;

[0049] Figure 23 This is another cross-sectional structural diagram of the second ladder and the limiting member in a ladder structure provided in the application implementation.

[0050] Figure label:

[0051] A - First direction, B - Second direction, C - Third direction, D - Fourth direction, 10 - First ladder, 11 - Receiving slot, 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 - Slide groove, 23 - Limiting member, 231 - Protrusion, 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 - First... Three limiting surfaces, 30-first connecting assembly, 31-ratchet, 311-center hole, 312-helical tooth, 3121-sloping surface, 3122-stop surface, 3123-first edge, 3124-second edge, 32-elastic element, 33-fitting element, 331-fitting part, 3311-arc surface, 34-first rotating shaft, 40-cover plate, 41-positioning hole, 50-pedal, 60-locking device, 61-lock hook, 62-lock buckle, 63-control switch, 70-magnetic element, 80-buffer element, 90-second connecting assembly, 91-fixing element, 92-second rotating shaft, 93-positioning element, 100-climbing structure, 200-body, 300-longitudinal beam, 1000-vehicle. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. Directional terms used herein, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the use of directional terms is for better and clearer explanation and understanding of this application, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation of this application.

[0054] Furthermore, the serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages).

[0055] Please see Figure 1 , Figure 2 and Figure 3 This application provides a ladder structure 100, which 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 and the second ladder 20a are connected. The first ladder 10 is used to fix to the body 200 of the vehicle 1000. The second ladder 20a is adapted to move relative to the first ladder 10 under the action of an external force to be in an unfolded state or a retracted state. The locking device 60 is disposed on the first ladder 10 and is adapted to lock the second ladder 20a in the retracted state.

[0056] By setting up a first ladder 10 and a second ladder 20a, and by allowing the second ladder 20a to move relative to the first ladder 10 under external force to be in an unfolded state, the overall length of the ladder structure 100 is longer, which shortens the distance between the ladder structure 100 and the ground, making it easier to climb. The second ladder 20a can also move relative to the first ladder 10 to be in a retracted state, and the second ladder 20a is kept in the retracted state by the locking device 60, making the ladder structure 100 compact overall.

[0057] For example, 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. 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 is folded relative to the first ladder 10. 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 stowed state; when the second ladder 20a rotates relative to the first ladder 10 in the first direction A until the second ladder 20a can no longer rotate, the second ladder 20a unfolds relative to the first ladder 10, as shown below. Figure 3 and Figure 6 As shown, specifically, the second ladder 20a is set at an angle to the first ladder 10.

[0059] Please combine Figure 4 and Figure 5For 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 frame on the top of the vehicle body 200). The ladder structure 100 also includes a cover plate 40, which is disposed on the top of the first ladder 10. The cover plate 40 is provided with a positioning hole 41. The longitudinal beam 300 of the luggage frame is provided with a mating hole adapted to the positioning hole 41. The top of the first ladder 10 is fixedly connected to the longitudinal beam 300 of the luggage frame by bolts passing through the positioning hole 41 and the mating hole.

[0060] Furthermore, the bottom of the first ladder 10 is provided with a magnetic suction component 70 (such as a magnetic suction cup), which attaches the bottom of the first ladder 10 to the side of the metal body 200. This replaces the traditional structure of fixing the bottom of the first ladder 10 with bolts, eliminating the need to drill holes in the body 200 and preserving the aesthetics of the body 200.

[0061] For example, the ladder structure 100 also includes a plurality of buffers 80 (such as rubber pads). The buffers 80 are fixedly connected to one side of the first ladder 10 facing the vehicle body 200 of the vehicle 1000. The buffers 80 are supported on the window glass on the vehicle body 200, which can disperse the pressure of the ladder structure 100 on the vehicle body 200 when stepping on the ladder structure 100, and avoid damaging the structure of the vehicle body 200.

[0062] Please see Figure 6 and Figure 7 The ladder structure 100 also includes a first connecting component 30, which is disposed on the first ladder 10 and the second ladder 20a. The first connecting component 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 an unfolded state.

[0063] By providing a first connecting component 30 between the first ladder 10 and the second ladder 20a, and by providing a first damping force to the second ladder 20a when it unfolds relative to the first ladder 10, the second ladder 20a can unfold slowly, reducing the damage to the ladder structure 100 and / or the vehicle body 200 when the second ladder 20a unfolds, ensuring the service life of the ladder structure 100 and / or the vehicle body 200, and also effectively preventing injury to users when the second ladder 20a unfolds relative to the first ladder 10.

[0064] When the second ladder 20a rotates relative to the first ladder 10 in the second direction B to be in a retracted state, a second damping force is provided, 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 connecting component 30 provides a second damping force to the second ladder 20a, and the first damping force is greater than the second damping force. This results in the second ladder 20a having a greater damping force limitation when unfolded relative to the first ladder 10 compared to when folded. The second ladder 20a will not fall directly and quickly, damaging the ladder structure 100 and / or the vehicle body 200 of the vehicle 1000, thus ensuring the service life of the ladder structure 100 and / or the vehicle body 200, and effectively preventing injury to users when the second ladder 20a is unfolded relative to the first ladder 10.

[0066] Please see Figure 8 , Figure 9 and Figure 10 For example, the first connecting assembly 30 includes a ratchet 31, an elastic element 32, and a mating element 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. The other of the first ladder 10 and the second ladder 20a has a mounting hole 211. One end of the elastic element 32 is fixed in the mounting hole 211, and the other end of the elastic element 32 is fixedly connected to the mating element 33. The elastic element 32 is always in a compressed state, and the mating element 33 engages with the ratchet 31.

[0067] For example, ratchet 31 is fixed to the end of the first ladder 10, and a mounting hole 211 is formed on the end of the second ladder 20a. The mounting hole 211 is a blind hole. One end of the elastic member 32 is fixed to the side wall of the mounting 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 of the ratchet 31 facing the second ladder 20a. The elastic member 32 is always in an elastically compressed state and always applies a pushing force to 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, the mating member 33 applies pressure to the elastic member 32 due to the action of the ratchet 31, causing the elastic member 32 to be further compressed. This makes 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 its own weight and the first damping force.

[0068] For example, the ratchet 31 has a plurality of helical teeth 312 on the side facing the second ladder 20a. The plurality of helical teeth 312 are arranged circumferentially around the rotation center of the ratchet 31. Each helical tooth 312 has an inclined surface 3121 and a stop surface 3122. The inclined surface 3121 faces the mounting hole 211. The inclined surface 3121 includes a first edge 3123 and a second edge 3124 that are opposite each other in the circumferential direction of the ratchet 31. Along the axial direction of the ratchet 31, the first edge 3123... The distance between the surface of the ratchet 31 away from the inclined surface 3121 is less 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 the first edge 3123 of an inclined surface 3121 and the second edge 3124 of an adjacent inclined surface 3121 near the first edge 3123. The stop surface 3122 may be parallel to the axial direction of the ratchet 31.

[0070] Among them, the ratchet 31 is a ring structure, and the ratchet 31 has a central hole 311. The axis of the central hole 311 is collinear with the axis of the mounting hole 211. On the axial direction of the central hole 311, the helical tooth 312, the mating part 33, the elastic part 32, and the end of the second ladder 20a are arranged in sequence. The mating part 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 multiple inclined surfaces 3121 are at the same height in the axial direction of the central hole 311, and the first edges 3123 of the multiple inclined surfaces 3121 are 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 mating member 33 slides from one inclined surface 3121 along the stop surface 3122 to the first edge 3123 on another 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 mating member 33 slides directly from the first edge 3123 of an inclined plane 3121 to another adjacent inclined plane 3121 in the second direction B. During this process, the mating member 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] For example, the end of the mating part 33 facing the ratchet 31 is provided with a mating part 331, the mating part 331 is opposite to the helical tooth 312, and the mating part 331 has an arc surface 3311, which is the circumferential surface of the mating part 331.

[0076] The mating part 331 has a hemispherical structure and is located at the end of the mating part 33. In the axial direction of the central hole 311, the mating part 331 is opposite to the helical tooth 312 and abuts against the inclined surface 3121.

[0077] When the second ladder 20a rotates relative to the first ladder 10 in the first direction A, the mating part 331, under the action of the elastic member 32 and the arc surface 3311, rotates from the inclined surface 3121 of a 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 mating part 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, the mating part 331, under the action of the elastic member 32 and the arc surface 3311, rotates from the inclined surface 3121 of a helical tooth 312 to the inclined surface 3121 of an adjacent helical tooth 312. The mating part 33 and the elastic member 32 provide a second damping force to the second ladder 20a.

[0078] By setting 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 mating part 331 is more likely to slide along the stop surface 3122 to the highest point of the 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 part 12 located at the end of the first ladder 10. The first fixing part 12 includes a first side wall 121 and a second side wall 122 opposite to each other. A ratchet 31 is fixed to the first side wall 121. The second ladder 20a includes a first rotating part 21 located at the end of the second ladder 20a. The first rotating part 21 is located between the first side wall 121 and the second side wall 122. The first connecting assembly 30 also includes a first rotating shaft 34. The first rotating shaft 34 passes through the first side wall 121, the first rotating part 21, the ratchet 31 and the second side wall 122 in sequence. The first rotating part 21 rotates around the first rotating shaft 34 in a first direction A or a second direction B.

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

[0081] During the rotation of the second ladder 20a, the ratchet 31 remains stationary, and the mating part 33 rotates along the helical teeth 312 of the ratchet 31 under the drive of the first rotating part 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 and the second limiting surface 212 cooperate to limit the angle of rotation of the second ladder 20a relative to the first ladder 10.

[0083] Specifically, the bottom wall 123 of the first fixing part 12 has a first limiting surface 1231, and the first rotating part 21 has a second limiting surface 212. During the process of the second ladder 20a switching from the storage state to the unfolded state, the first rotating part 21 rotates relative to the first fixing part 12 in the first direction A. When the second ladder 20a is in the unfolded state, the first limiting surface 1231 and the second limiting surface 212 overlap. During the process of the second ladder 20a switching from the unfolded state to the storage state, the first rotating part 21 rotates relative to the first fixing part 12 in the second direction B. When the second ladder 20a is in the storage state, the first limiting surface 1231 and the second limiting surface 212 are opposite to each other.

[0084] The first limiting surface 1231 is located at the end of the first fixing part 12 near the bottom wall 123 of the first fixing part 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 a first limiting surface 1231 and a second limiting surface 212, when the second climbing ladder 20a rotates to the second state relative to the first climbing ladder 10 in the first direction A, the second limiting surface 212 and the first limiting surface 1231 overlap to restrict the second climbing ladder 20a from continuing to rotate, thereby realizing the step-limiting function of the climbing ladder structure 100.

[0086] Please see Figure 3 and Figure 12 The ladder structure 100 also includes a third ladder 20b, which is connected to the second ladder 20a. 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] When the second ladder 20a is in an deployed state relative to the first ladder 10, the third ladder 20b can slide relative to the second ladder 20a to be in a deployed state or a semi-deployed state. When the third ladder 20b is in a semi-deployed state, the second ladder 20a is in an deployed state. Figure 6 As shown.

[0088] The third ladder 20b is configured such that when the second ladder 20a is in the deployed state and the third ladder 20b is in the deployed state, such as... Figure 12 As shown, the distance between the ladder structure 100 and the ground is shortened, making it easier to climb.

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

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

[0091] When the second ladder 20a is in the retracted state, it is housed within the receiving cavity 221, such as... Figure 6 As shown.

[0092] It is understandable that the third ladder 20b also has a retracted state, and the third ladder 20b can move relative to the first ladder 10 to switch from the retracted state to the semi-expanded state, while the second ladder 20a is in the unfolded state, such as... Figure 6 As shown; then the third ladder 20b slides relative to the second ladder 20a in its deployed state to switch from the semi-deployed state to the deployed state, as shown. Figure 12 As shown. When the folded ladder structure 100 is in operation, the third ladder 20b slides relative to the second ladder 20a to switch from the deployed state to the semi-expanded state. The third ladder 20b and the second ladder 20a move together relative to the first ladder 10, so that both the second ladder 20a and the third ladder 20b are in the retracted state, as shown. Figure 2 As shown.

[0093] Please combine Figure 14For example, the first ladder 10 has a receiving groove 11 on the side away from the vehicle body 200. The receiving groove 11 is used to receive 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 ladder structure 100 compact overall.

[0094] Both the first ladder 10 and the third ladder 20b are equipped with footboards 50, which are used by users to step on.

[0095] Please combine Figure 14 , Figure 15 and Figure 16 The locking device 60 includes a hook 61, a latch 62, and a control switch 63. The hook 61 is located near the top of the first ladder 10, and the latch 62 is located on the third ladder 20b to engage with the hook 61. The control switch 63 is located on the third ladder 20b. When the ladder structure 100 is in a fully folded state, the control switch 63 is located on the side of the third ladder 20b away from the vehicle body 200. Pressing the control switch 63 will disengage the hook 61 from the latch 62. The third ladder 20b and the second ladder 20a move slowly under their own weight and the first damping force provided by the first connecting component 30 until the third ladder 20b is in a semi-open state. When the second ladder 20a and the third ladder 20b rotate relative to the first ladder 10 in the second direction B into the receiving slot 11, the hook 61 engages with the latch 62, fixing the third ladder 20b in the receiving slot 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 latch 62 by intelligent control. Alternatively, the third ladder 20b can be rotated relative to the first ladder 10 in the second direction B by intelligent control, so that the third ladder 20b is locked in the receiving slot 11 of the first ladder 10.

[0097] Please see Figure 13 , Figure 17 and Figure 18 For example, the ladder structure 100 also includes a limiting member 23, which is connected to both the second ladder 20a and the third ladder 20b. The limiting member 23 is used to limit the length of the sliding 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] For example, the limiting member 23 is formed along the length direction of the limiting member 23 (e.g. Figure 18 The third ladder structure 100 also includes a second connecting component 90, which includes a fixing member 91 that passes through the waist-shaped through hole 232 and whose opposite ends are respectively fixed to the two opposite side walls of the receiving cavity 221. The sliding stroke of the third ladder 20b is equal to the length of the waist-shaped through hole 232.

[0101] In this application, since the first rotating part 21 at one end of the second ladder 20a is rotatably connected to the first fixed part 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, in the length direction of the third ladder 20b, the third ladder 20b is actually displaced relative to the second ladder 20a and the limiting member 23 under its own gravity.

[0102] It is understandable that the travel distance of the second ladder 20a within the receiving cavity 221 is actually the length of the waist-shaped through hole 232.

[0103] The waist-shaped through hole 232 is provided in the width direction of the limiting member 23 (e.g., Figure 18 The through hole in the fourth direction (D) shown, the two open ends of the waist-shaped through hole 232 face the 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 passes through one side wall of the third ladder 20b, the waist-shaped through hole 232 and the other side wall of the third ladder 20b in sequence, 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.

[0104] The two opposite sidewalls of the receiving cavity 221 are formed with grooves 222, and the limiting member 23 is formed with protrusions 231 corresponding to the grooves 222 on opposite sides. The third ladder 20b moves under the action of the protrusions 231 and the grooves 222.

[0105] The protrusion 231 extends into the slide groove 222, and the protrusion 231 cooperates with the slide groove 222, so that the third ladder 20b slides smoothly under the limitation of the protrusion 231 and the slide groove 222.

[0106] When the third ladder 20b slides under the limit of the slide groove 222 and the protrusion 231 until the fixing member 91 abuts against the side walls of the waist-shaped through hole 232 at both ends 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-deployed state, the fixing member 91 abuts against the side wall of the waist-shaped through hole 232 near the second ladder 20a, and the second ladder 20a is accommodated 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] In any state of the ladder structure 100, the limiting member 23 is always located within the receiving cavity 221. When the third ladder 20b is stepped on, the limiting member 23 supports the third ladder 20b, thereby strengthening its structural strength. When the ladder structure 100 is in a semi-open state (i.e., the third ladder 20b is in a semi-open state), the fixing member 91 abuts against the side wall of the waist-shaped through hole 232 near the first ladder 10. At this time, a stop structure can be provided in the receiving cavity 221 to prevent the third ladder 20b from moving along its length under its own weight, thus keeping the third ladder 20b in a semi-open 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. The second ladder 20a and the third ladder 20b rotate relative to the first ladder 10 in the first direction A until the third ladder 20b is in a semi-deployed state and the second ladder 20a is in an deployed state. That is, during the process of the third ladder 20b sliding relative to the second ladder 20a to be in a deployed state, the third ladder 20b automatically moves downward under its own gravity, the second ladder 20a fully extends out of the receiving cavity 221, and the third ladder 20b bends relative to the second ladder 20a.

[0110] Please combine Figure 17 By setting a second ladder 20a between the limiting member 23 and the first ladder 10, the distance between the third ladder 20b and the vehicle body 200 is shortened after the third ladder 20b slides down under its own weight, and the third ladder 20b is more vertical, making it easier to step on the pedal 50 on the third ladder 20b.

[0111] Please combine Figure 19 For example, the limiting member 23 includes a second rotating part 233, the second ladder 20a includes a second fixing part 24, the second fixing part 24 includes a third side wall 241 and a fourth side wall 242 opposite to each other, the second rotating part 233 is disposed between the third side wall 241 and the fourth side wall 242, and the second connecting assembly 90 also includes a second rotating shaft 92, the second rotating shaft 92 passes through the third side wall 241, the second rotating part 233 and the fourth side wall 242 in sequence, and the second rotating part 233 rotates around the second rotating shaft 92 in a first direction A or a second direction B.

[0112] When the second ladder 20a is in the unfolded 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 extend completely out of the receiving cavity 221, and the limiting member 23 and the third ladder 20b are both 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] The two ends of the second rotating shaft 92 are fixed to the third side wall 241 and the fourth side wall 242, respectively.

[0115] Please combine Figure 20 and Figure 21 During the transition from the semi-deployed state to the deployed state, the second rotating part 233 rotates relative to the second fixed part 24 about the second rotating axis 92 in the first direction A. Since the limiting member 23 is housed within 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 deployed third ladder 20b is closer to the vehicle body 200 than the semi-deployed third ladder 20b, making it more vertical and easier for users to step on. During the transition from the deployed state to the semi-deployed state, the second rotating part 233 rotates relative to the second fixed part 24 about the second rotating axis 92 in the second direction B. The third ladder 20b rotates relative to the second ladder 20a in a direction away from the vehicle body 200. In the semi-deployed state, the third ladder 20b and the second ladder 20a are on the same straight line. Figure 13 and Figure 14 As shown.

[0116] It is understood that there are two of each of the second ladder 20a, the limiting member 23, and the third ladder 20b. Each of the second ladders 20a 24 is provided with a second fixing part 24, and each limiting member 23 includes a second rotating part 233.

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

[0118] The positioning member 93 is fixedly connected to the third side wall 241 at one end, and the second rotating part 233 rotates relative to the second fixed part 24 for a distance equal to the arc length of the arc-shaped through hole 2331.

[0119] By setting the positioning element 93 and the arc-shaped through hole 2331, the rotation range of the second rotating part 233 is limited. Since the second rotating part 233 is fixedly connected to the second ladder 20a, the rotation range of the second ladder 20a relative to the limiting element 23 is limited. Moreover, the limiting element 23 is always housed 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] For example, 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 and are used to limit the angle of rotation of the second ladder 20a relative to the limiting member 23.

[0121] Specifically, the third limiting surface 243 is disposed on the second fixed part 24, and the fourth limiting surface 2332 is disposed on the second rotating part 233. When the third ladder 20b is in the deployed state, the third limiting surface 243 and the fourth limiting surface 2332 overlap.

[0122] The third limiting surface 243 is located on the second fixed part 24 near the end of the second fixed part 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 second ladder 20a from continuing to rotate, thereby realizing the function of limiting the stepping of the third ladder 20b.

[0123] It is understandable that after the third limiting surface 243 and the fourth limiting surface 2332 abut and overlap, the positioning member 93 abuts against the side wall of one end of the arc-shaped through hole 2331 in the arc length direction. Through the limiting of the third limiting surface 243 and the fourth limiting surface 2332, as well as the limiting of the positioning member 93 and the arc-shaped through hole 2331, the function of limiting the stepping of 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 limiting.

[0125] Optionally, the second connecting assembly 90 may include a ratchet 31, an elastic element 32, and a mating element 33. Its specific structure may be the same as that of the ratchet 31, elastic element 32, and mating element 33 of the first connecting assembly 30, with similar connection and mating methods. By providing the ratchet 31, elastic element 32, and mating element 33 between the second rotating part 233 and the second fixed part 24, the third ladder 20b can rotate slowly under its own weight in the first direction A.

[0126] Optionally, the first rotating part 21 may also have an arc-shaped through hole 2331. The first connecting assembly 30 may include a positioning member 93, one end of which is fixedly connected to the second sidewall 122, and part of which extends into the arc-shaped through hole 2331. The stroke of the first rotating part 21 relative 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 range of rotation 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. Furthermore, the supporting and limiting effect on the second ladder 20a is strengthened by the limiting of the first limiting surface 1231 and the second limiting surface 212, as well as the limiting of the positioning member 93 and the arc-shaped through hole 2331 between the first ladder 10 and the second ladder 20a.

[0127] Optionally, the second ladder 20a and the limiting member 23 can be housed within the first ladder 10, and the limiting member 23 is always housed within 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-open state (e.g., Figure 6 After (as shown), the second ladder 20a and the limiting member 23 can slide relative to the first ladder 10 until the second ladder 20a extends beyond the first ladder 10 (as shown). Figure 3 As shown, the second ladder 20a extends after the first ladder 10, and the third ladder 20b rotates relative to the second ladder 20a in the first direction A under its own weight, thus putting the third ladder 20b into a deployed state. Since the third ladder 20b needs to be equipped with a footboard 50, and its weight is greater than that of the second ladder 20a, a ratchet 31, an elastic element 32, and a mating element 33 can be provided in the second connecting assembly 90 between the third ladder 20b and the second ladder 20a, so that the third ladder 20b can rotate slowly.

[0128] In this application, the three-section folding and sliding structure ensures that the ladder structure 100 can climb the roof of the vehicle while occupying a small volume. The first fixing part 12, the first rotating part 21, the second fixing 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 and greatly reduce the production and manufacturing costs.

[0129] The above are some embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A ladder structure, characterized in that, include: A first ladder and a second ladder are rotatably connected. The first ladder is used to fix the vehicle body, and the second ladder is adapted to move relative to the first ladder under the action of external force to be in an unfolded state or a retracted state. The ladder structure further includes a first connecting assembly, which is connected to both the first ladder and the second ladder. The first connecting assembly includes a ratchet, an elastic element, and a mating element. The ratchet is fixed to one of the first ladder and the second ladder. The other ladder has a mounting hole. One end of the elastic element is fixed in the mounting hole, and the other end is fixedly connected to the mating element so that the end of the mating element engages with the ratchet. The ratchet has multiple helical teeth on the side facing the mounting hole, and these teeth rotate around the ratchet. The moving centers are arranged circumferentially in sequence; each of the helical teeth has an inclined surface and a stop surface, the inclined surface facing the mounting hole, the inclined surface including a first edge and a second edge opposite each other in the circumferential direction of the ratchet; along the axial direction of the ratchet, the distance between the first edge and the surface of the ratchet opposite the inclined surface is less than the distance between the second edge and the surface of the ratchet opposite the inclined surface; the inclined surface is inclined from the first edge to the second edge, the stop surface connects the first edge of one inclined surface and the second edge of an adjacent inclined surface, and the stop surface intersects with the inclined surface; A locking device is disposed on the first ladder, and the locking device is adapted to lock the second ladder in the retracted state.

2. The ladder structure according to claim 1, characterized in that, The first connecting component provides a first damping force when the second ladder rotates relative to the first ladder to be in an unfolded state.

3. The ladder structure according to claim 2, characterized in that, The first connecting component provides a second damping force when the second ladder rotates relative to the first ladder to a retracted state, the first damping force being greater than the second damping force.

4. The ladder structure according to claim 1, 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 to limit the angle of rotation of the second ladder relative to the first ladder.

5. The ladder structure according to claim 1, characterized in that, The ladder structure also includes a third ladder, which is connected to the second ladder and is adapted to slide relative to the second ladder so that the third ladder is in a deployed state or a semi-deployed state.

6. The ladder structure according to claim 5, characterized in that, When the second ladder is in the unfolded state relative to the first ladder, the third ladder can slide relative to the second ladder.

7. The ladder structure according to claim 6, characterized in that, One of the second ladder and the third ladder is provided with a receiving cavity for accommodating the other of the second ladder and the third ladder.

8. The ladder structure according to claim 7, characterized in that, The third ladder is provided with the receiving cavity, which is used to accommodate the second ladder. When the third ladder is in the deployed state relative to the second ladder, the second ladder extends out of the receiving cavity. When the third ladder is in the semi-deployed state relative to the second ladder, the second ladder is accommodated in the receiving cavity.

9. The ladder structure according to claim 8, characterized in that, The ladder structure also includes a limiting member, which is connected to both the second ladder and the third ladder. The limiting member is used to limit the length of the sliding of the third ladder relative to the second ladder.

10. The ladder structure according to claim 9, characterized in that, The limiting member is disposed within the receiving cavity; the limiting member has an oblong through hole extending along the length direction of the limiting member; The ladder structure also includes a fixing member, which passes through the waist-shaped through hole, and the two opposite ends of the fixing member are respectively fixed to the two opposite side walls of the receiving cavity.

11. The ladder structure according to claim 9, characterized in that, The receiving cavity has two opposite sidewalls with grooves, and the limiting member has protrusions on opposite sides corresponding to the grooves. The third ladder moves under the action of the protrusions and the grooves.

12. The ladder structure according to claim 9, characterized in that, The limiting member and the second ladder are rotatably connected.

13. The ladder structure according to claim 8, characterized in that, When the third ladder slides relative to the second ladder to be in the deployed state, the second ladder extends fully out of the receiving cavity, and the third ladder bends relative to the second ladder.

14. The ladder structure according to claim 9, characterized in that, The limiting member has an arc-shaped through hole, and the ladder structure also includes a positioning member. The positioning member is fixedly connected to the second ladder, and part of the positioning member extends into the arc-shaped through hole. The positioning member cooperates with the arc-shaped through hole and is used to limit the angle of rotation of the second ladder relative to the limiting member.

15. The ladder structure according to claim 14, characterized in that, The second ladder has a third limiting surface, and the limiting member has a fourth limiting surface. The third limiting surface and the fourth limiting surface cooperate to limit the angle of rotation of the second ladder relative to the limiting member.

16. The ladder structure according to claim 15, characterized in that, The fourth limiting surface and the arc-shaped through hole are located at opposite ends in the thickness direction of the limiting member.

17. The ladder structure according to claim 1, characterized in that, The ladder structure also includes multiple buffer components, which are fixedly connected to one side of the first ladder facing the vehicle body.

18. A vehicle, characterized in that, include: Body; The ladder structure as described in any one of claims 1-17, wherein the first ladder is fixed to the vehicle body.

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