Crawling ladder assembly and vehicle

Abstract

The embodiment of the utility model provides a crawling ladder assembly and a vehicle, the crawling ladder assembly comprises a mounting frame, a first ladder assembly and a second ladder assembly, the first ladder assembly is pivotally connected with the mounting frame so that the first ladder assembly swings between a closing position and an opening position relative to the mounting frame, and the second ladder assembly is slidably connected with the first ladder assembly so that the second ladder assembly can swing between the closing position and the opening position relative to the mounting frame. Therefore, the second ladder assembly moves between the extending position and the retracting position relative to the first ladder assembly. The crawling ladder assembly is small in size and occupied space, simple in structure, high in structural strength and stability and convenient to operate and use.

Description

Technical Field

[0001] The utility model relates to the technical field of ladders, in particular to a ladder assembly and a vehicle. Background Art

[0002] In the related art, vehicle ladders typically include an upper ladder frame and a lower ladder frame. The upper ladder frame is mounted to the vehicle body via a connecting rod, thereby forming a four-bar linkage between the upper ladder frame, the connecting rod, and the vehicle body. This allows the upper ladder frame to be folded onto the vehicle body or extended outward from the vehicle body. During use, the weight of the user is primarily borne by the connecting rod, resulting in poor structural strength and stability, which affects usability. In the related art, the lower ladder frame is rotatably connected to the upper ladder frame via a pivot. When not in use, the user flips the lower ladder frame onto the upper ladder frame. When in use, the user flips the lower ladder frame off the upper ladder frame and unfolds it. Folding and unfolding the lower ladder frame requires a large space, resulting in a large volume of the folded ladder. Folding and unfolding the lower ladder frame is laborious and inconvenient. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present invention provides a ladder assembly with a ladder frame and a small space occupation, a simple structure, high stability and structural strength, and simple and convenient operation and use.

[0004] An embodiment of the present utility model further provides a vehicle having the ladder assembly of the above embodiment.

[0005] The ladder assembly of the embodiment of the utility model includes:

[0006] Install the frame;

[0007] a first ladder frame pivotally connected to the mounting frame so that the first ladder frame swings relative to the mounting frame between a closed position and an open position;

[0008] A second ladder frame is slidably coupled to the first ladder frame so that the second ladder frame moves relative to the first ladder frame between an extended position and a retracted position.

[0009] In some embodiments, in the closed position, the first ladder frame and the mounting frame overlap each other, the first ladder frame is located inside the mounting frame, or the first ladder frame is positioned outside the mounting frame;

[0010] In the extended position, the first ladder frame is deployed from the mounting frame so that a plane of the first ladder frame intersects a plane of the mounting frame.

[0011] In some embodiments, in the extended position, the second ladder rack extends beyond the first ladder rack by a first predetermined length, and in the retracted position, the second ladder rack does not extend beyond the first ladder rack or extends beyond the first ladder rack by a second predetermined length, wherein the second predetermined length is less than the first predetermined length.

[0012] In some embodiments, the first ladder frame is directly pivotally connected to the mounting frame via a first pivot.

[0013] In some embodiments, the first pivot extends inwardly from an inner side of the mounting frame, wherein in the closed position, the first ladder frame is located within the mounting frame so that a plane in which the first ladder frame lies coincides with a plane in which the mounting frame lies;

[0014] Alternatively, the first pivot extends outwardly from an outer surface of the mounting frame, wherein in the closed position, the first ladder frame is sleeved on the outer side of the mounting frame so that a plane where the first ladder frame is located coincides with a plane where the mounting frame is located;

[0015] Alternatively, the first pivot is provided on a front surface of the mounting frame, wherein in the closed position, the first ladder frame overlaps the mounting frame.

[0016] In some embodiments, the ladder assembly further comprises a connecting rod, a first connecting rod end of the connecting rod being pivotally connected to the mounting frame and slidable relative to the mounting frame, and a second connecting rod end of the connecting rod being pivotally connected to the first ladder frame.

[0017] In some embodiments, the mounting frame is provided with a guide groove, the first connecting rod end is slidable along the guide groove, and the inner side surface of the mounting frame is provided with a receiving groove, and in the closed position, the connecting rod is accommodated in the receiving groove.

[0018] In some embodiments, the first end and the second end of the guide groove are respectively provided with a clamping groove, and the first connecting rod end can slide into the clamping groove to prevent the first connecting rod end from sliding along the guide groove.

[0019] In some embodiments, the ladder assembly further includes a locking component having a locked state and a released state, wherein the locking component is slidably mounted on the mounting frame along the guide groove and is connected to the first link end, wherein in the locked state, the locking component presses the link onto the mounting frame to prevent the first link end from sliding along the guide groove, thereby preventing the link from rotating relative to the mounting frame, and in the released state, the locking component releases the link to allow the first link end to slide along the guide groove, thereby allowing the link to rotate relative to the mounting frame.

[0020] In some embodiments, the locking component includes an actuating rod, an abutment platform and a handle for driving the actuating rod, the handle includes a gripping portion, a cam portion and a limiting protrusion, the gripping portion has a connecting end and a free end, the cam portion is arranged at the connecting end of the gripping portion, the limiting protrusion is arranged on the gripping portion, the first connecting end of the actuating rod is connected to the first connecting rod end, the second connecting end of the actuating rod is pivotally connected to the cam portion, the cam surface of the cam portion abuts against the abutment platform so that when the handle is rotated, the actuating rod is driven to lock and release the connecting rod, and the limiting protrusion is used to stop the mounting frame.

[0021] In some embodiments, the ladder assembly further includes a stop pin, which is provided on the first ladder frame and is used to stop the second ladder frame to limit an extended length of the second ladder frame relative to the first ladder frame.

[0022] In some embodiments, the first ladder frame includes a first ladder side beam and a first ladder cross beam, the first ladder side beams are arranged parallel to each other and spaced apart, the first ladder cross beams are connected between the first ladder side beams, and the first ladder side beams are provided with a first sliding groove extending longitudinally thereof;

[0023] The second ladder frame includes a second ladder side beam and a second ladder cross beam, the second ladder cross beam being connected between lower ends of the second ladder side beams, and the second ladder side beam being slidable along the first sliding groove, wherein in the retracted position, the second ladder side beam is retracted into the first sliding groove, and the second ladder cross beam is located outside the first sliding groove and abuts against the lower ends of the first ladder side beams;

[0024] A stop portion is provided at the upper end of the second ladder side beam, and a stop pin is provided at the first ladder side beam, wherein the stop pin is used to stop the stop portion to prevent the upper end of the second ladder side beam from escaping from the first sliding groove.

[0025] In some embodiments, the ladder assembly further includes a fastening component, which is provided on one of the first ladder side beam and the second ladder side beam and stops at the other of the first ladder side beam and the second ladder side beam, and is used to dampen the sliding of the second ladder frame relative to the first ladder frame, so as to prevent the second ladder frame from sliding relative to the first ladder frame by relying on its own gravity and allow the second ladder frame to slide relative to the first ladder frame under external force.

[0026] In some embodiments, the fastening component includes a first fastening component and a second fastening component, and the second ladder side beam is provided with a second sliding groove;

[0027] The first locking member includes a first locking seat having a first mounting hole, a first elastic member, a first push rod and a first push ball, the first locking seat being mounted on the first ladder side beam, the inner end of the first push rod being engaged with the first mounting hole, the outer end of the first push rod being provided with a first accommodating groove, the first push ball being rotatably accommodated in the first accommodating groove, a part of the first push ball extending from the first accommodating groove, the first elastic member being located in the first mounting hole and being arranged between the first locking seat and the first push rod, the first elastic member pushing the first push rod in a direction away from the first locking seat so that the first push ball stops against the bottom surface of the second slide groove;

[0028] The second locking member includes a second locking seat, a second elastic member, a second push rod and a second push ball, and the opposite ends of the second locking seat are respectively provided with second mounting holes, the second locking seat is mounted on the upper end of the second ladder side beam, the inner end of the second push rod is engaged with the second mounting hole, the outer end of the second push rod is provided with a second accommodating groove, the second top ball is rotatably accommodated in the second accommodating groove, a part of the second top ball extends out of the second accommodating groove, the second elastic member is located in the second mounting hole and is provided between the second locking seat and the second push rod, the second elastic member pushes the second push rod in a direction away from the second locking seat so that the second top ball stops against the side of the first slide groove.

[0029] In some embodiments, the second ladder side beam includes an upper beam section and a lower beam section, and the lower end of the upper beam section is pivotally connected to the upper end of the lower beam section, wherein in the extended position, the lower ends of the lower beam section and the upper beam section are out of the first sliding groove, and the lower beam section relies on gravity to pivot relative to the upper beam section so that the lower beam section extends in the vertical direction.

[0030] In some embodiments, the mounting frame includes side frame beams and transverse frame beams, the side frame beams are arranged parallel to each other and spaced apart, the transverse frame beams are connected between the side frame beams, and in the closed position, the first ladder side beams are located inside the side frame beams and are side by side with each other, the inner side surfaces of the side frame beams are provided with accommodating grooves, and the side frame beams are provided with guide grooves;

[0031] The ladder assembly further includes a connecting rod and a locking component, wherein a first connecting rod end of the connecting rod is connected to the side frame beam, and a second connecting rod end of the connecting rod is pivotally connected to the first ladder frame, and in the closed position, the connecting rod is accommodated in the receiving groove;

[0032] The locking component is slidably mounted on the mounting frame along the guide groove and is connected to the first link end. The locking component is used to press the link onto the side frame beam to prevent the first link end from sliding and to release the link from the side frame beam to allow the first link end to slide.

[0033] A ladder assembly according to another embodiment of the present invention comprises:

[0034] Install the frame;

[0035] a first ladder frame pivotally connected to the mounting frame;

[0036] a second ladder frame, the second ladder frame being extendably and retractably connected to the first ladder frame;

[0037] a connecting rod, a first connecting rod end of the connecting rod being pivotally connected to the mounting frame, and a second connecting rod end of the connecting rod being pivotally connected to the first ladder frame;

[0038] a locking member for locking the first ladder frame to prevent the first ladder frame from swinging relative to the mounting frame and for releasing the first ladder frame to allow the first ladder frame to swing relative to the mounting frame;

[0039] The ladder assembly can move between the following states:

[0040] a closed state, wherein the first ladder frame is swung into and alongside the mounting frame, and the second ladder frame is retracted relative to the first ladder frame;

[0041] an open state, wherein the first ladder frame is swung out from the mounting frame and forms a predetermined angle with the mounting frame;

[0042] an extended state, wherein the first ladder frame is swung out from the mounting frame to form a predetermined angle with the mounting frame, and the second ladder frame is extended relative to the first ladder frame.

[0043] A ladder assembly according to another embodiment of the present invention comprises:

[0044] An installation frame, the installation frame comprising side frame beams and a transverse frame beam, the side frame beams being arranged parallel to each other and spaced apart, the transverse frame beam being connected between the side frame beams, the side frame beams being provided with guide grooves extending longitudinally thereof, and the inner side surfaces of the side frame beams being provided with accommodating grooves;

[0045] a first ladder frame, the first ladder frame comprising a first ladder side beam and a first ladder cross beam, the first ladder side beams being arranged parallel to each other and spaced apart, the first ladder cross beam being connected between the first ladder side beams, the first ladder side beams being provided with a first slide groove extending longitudinally thereof, the upper ends of the first ladder side beams being pivotally connected to the side frame beams, the first ladder frame being capable of being swung into the mounting frame so that the first ladder side beams are aligned with the side frame beams and are located inside the side frame beams, and the first ladder frame being capable of being swung out of the mounting frame so that the first ladder side beams intersect with the side frame beams;

[0046] The cam is connected to the lower end of the ladder handle by the user to adjust the height of the ladder, and the cam is connected to the lower end of the ladder handle by the user to adjust the height of the ladder.

[0047] a connecting rod, wherein a first connecting rod end of the connecting rod is pivotally connected to the side frame beam and slidable along the guide groove, and a second connecting rod end of the connecting rod is pivotally connected to the first ladder side beam;

[0048] A locking member releasably locks the link to prevent and allow the first link end to slide along the guide slot, thereby preventing and allowing the first ladder frame to swing relative to the mounting frame.

[0049] A ladder assembly according to another embodiment of the present invention comprises:

[0050] Install the frame;

[0051] a first ladder frame, the first ladder frame being pivotally connected to the mounting frame, the first ladder frame being swingable into and out of the mounting frame;

[0052] a second ladder frame, the second ladder frame comprising a first portion and a second portion, the lower end of the first portion being pivotally connected to the upper end of the second portion, the second ladder frame being slidably connected to the first ladder frame, the second ladder frame being extendable relative to the first ladder frame so that the lower end of the first portion and the second portion extend beyond the first ladder frame and the second portion is oriented in a vertical direction, and the second ladder frame being retractable relative to the first ladder frame so that the lower end of the second portion abuts against the lower end of the first ladder frame.

[0053] The ladder assembly of the embodiment of the utility model has a first ladder frame that is closed and opened relative to the mounting frame by pivoting, and a second ladder frame that is extended and retracted relative to the second ladder frame by sliding. It has a small size and occupies a small space, high structural strength and stability, and is simple, convenient and labor-saving to operate and use.

[0054] The vehicle of the embodiment of the present utility model comprises: a vehicle body and a ladder assembly, wherein the ladder assembly is the ladder assembly described in any of the above embodiments, and the ladder assembly is mounted on the vehicle body.

[0055] The vehicle of the embodiment of the utility model has a ladder assembly with a small volume and occupied space, high structural strength and stability, simple and convenient operation and use, and labor-saving, and the vehicle has low wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 1 is a perspective schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the first ladder frame is in a closed position, the second ladder frame is in a retracted position, and the locking component is in a locked state;

[0057] Figure 2 yes Figure 1 A perspective schematic diagram of the ladder assembly shown in another perspective;

[0058] Figure 3 1 is an exploded schematic diagram of a ladder assembly according to an embodiment of the present invention;

[0059] Figure 4 1 is an exploded schematic diagram of the mounting frame of the ladder assembly according to an embodiment of the present invention;

[0060] Figure 5 1 is an exploded schematic diagram of a first ladder frame of a ladder assembly according to an embodiment of the present invention;

[0061] Figure 6 It is an exploded schematic diagram of the second ladder frame of the ladder assembly according to an embodiment of the present utility model;

[0062] Figure 7A It is a cross-sectional schematic diagram of the first fastening component of the ladder assembly according to an embodiment of the present utility model;

[0063] Figure 7B It is a cross-sectional schematic diagram of the second fastening component of the ladder assembly according to an embodiment of the present utility model;

[0064] Figure 8 1 is an exploded schematic diagram of a locking component of a ladder assembly according to an embodiment of the present invention;

[0065] Figure 9 It is a partial cross-sectional schematic diagram of the ladder assembly of an embodiment of the utility model, wherein the locking component is in a locked state;

[0066] Figure 10 It is a partial cross-sectional schematic diagram of the ladder assembly of an embodiment of the utility model, wherein the locking component is in a released state;

[0067] Figure 11 2 is a perspective schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the first ladder frame is swung from a closed position toward an open position, the second ladder frame is in a retracted position, and the locking member is in a released state;

[0068] Figure 12 1 is a perspective schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the first ladder frame is in an extended position, the second ladder frame is in a retracted position, and the locking component is in a released state;

[0069] Figure 13 1 is a perspective schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the first ladder frame is in an extended position, the second ladder frame is in a retracted position, and the locking component is in a locked state;

[0070] Figure 14 is a perspective schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the first ladder frame is in an open position, the second ladder frame is in an extended position, the locking member is in a locked state, and the lower beam section of the second ladder frame is substantially coaxial with the lower beam section;

[0071] Figure 15 yes Figure 14 A partial schematic diagram of the ladder assembly shown;

[0072] Figure 16 is a perspective schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the first ladder frame is in an extended position, the second ladder frame is in an extended position, the locking member is in a locked state, and the lower beam section of the second ladder frame is swung downward by a predetermined angle relative to the lower beam section and extends in a generally vertical direction;

[0073] Figure 17 yes Figure 16 A schematic side view of the ladder assembly shown;

[0074] Figure 18 yes Figure 16 A partial schematic diagram of the ladder assembly shown;

[0075] Figure 19 yes Figure 16 Another partial schematic diagram of the ladder assembly shown;

[0076] Figure 20 Schematic diagram of a vehicle according to an embodiment of the present invention.

[0077] Reference numerals:

[0078] 100. Ladder assembly;

[0079] 200, vehicle; 201, vehicle body; 202, luggage rack;

[0080] 1. Mounting frame; 11. Receiving groove; 12. Guide groove; 121. First end; 122. Second end; 13. First pivot; 110. Side frame beam; 1101. Upper beam section; 1102. Lower beam section; 111. Horizontal frame beam;

[0081] 2. First ladder frame; 21. First ladder side beam; 22. First ladder cross beam; 23. First chute;

[0082] 3. Second ladder frame; 31. Second ladder side beam; 311. Upper beam section; 3110. Accommodating hole; 3111. Through hole; 312. Lower beam section; 313. First abutting surface; 314. Second abutting surface; 32. Second ladder crossbeam; 33. Stopper; 34. Second chute; 341. Upper chute section; 342. Lower chute section; 35. Second pivot;

[0083] 4. Connecting rod; 41. First connecting rod end; 42. Second connecting rod end;

[0084] 5. Locking member; 51. Actuating rod; 511. First connecting end; 512. Second connecting end; 52. Abutment platform; 53. Handle; 531. Cam portion; 532. Grip portion; 533. Stopper; 5301. Connecting end; 5302. Free end; 54. Connecting bolt; 55. Third pivot; G. Gap;

[0085] 6. Stop pin;

[0086] 7. Fastening component; 71. First fastening component; 710. First fastening seat; 7101. First mounting hole; 711. First elastic member; 712. First ejector pin; 7121. First receiving groove; 713. First ejector ball; 72. Second fastening component; 720. Second fastening seat; 7201. Second mounting hole; 7202. Positioning hole; 721. Second elastic member; 722. Second ejector pin; 7221. Second receiving groove; 723. Second ejector ball;

[0087] 8. Positioning pin. DETAILED DESCRIPTION

[0088] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0089] The following describes a ladder assembly according to an embodiment of the present invention with reference to the accompanying drawings.

[0090] like Figures 1-19As shown, the ladder assembly 100 of the embodiment of the present invention includes a mounting frame 1 , a first ladder frame 2 and a second ladder frame 3 .

[0091] The first ladder frame 2 is pivotally connected to the mounting frame 1 so that the first ladder frame 2 can swing between a closed position and an open position relative to the mounting frame 1. For example, Figure 1 and Figure 2 The first ladder frame 2 is shown in the closed position. Figure 12-14 and Figure 16-17 The first ladder frame 2 is shown in the open position, Figure 11 The process of the first ladder frame 2 swinging from the closed position to the open position is shown.

[0092] The second ladder frame 3 is slidably connected to the first ladder frame 2 so that the second ladder frame 3 can move between an extended position and a retracted position relative to the first ladder frame 2. For example, Figure 1-Figure 2 as well as Figure 11-13 The second ladder frame 3 is shown in the retracted position. Figure 14 and Figure 16-17 The second ladder frame 3 is shown in the extended position.

[0093] During use, the user pulls the first ladder frame 2 by hand to swing the first ladder frame 2 from the closed position to the open position, and then pulls the second ladder frame 3 by hand to slide the second ladder frame 3 from the retracted position to the extended position. Then the user can climb through the ladder assembly 100, for example, to approach the roof of a vehicle.

[0094] In the ladder assembly of the present invention, the first ladder frame swings to open and close from the mounting frame, while the second ladder frame slides to extend and retract, eliminating the need for the user to flip the second ladder frame. This simplifies operation and saves effort. During use, the first ladder frame and the mounting frame form a generally triangular structure, thereby enhancing structural strength and stability. Furthermore, minimal space is required to operate the first ladder frame for swinging and the second ladder frame for extending and retracting. Regardless of whether the first ladder frame is in the closed or open position, the ladder assembly maintains a small footprint and space requirements, resulting in a compact structure and ease of installation and use.

[0095] In some embodiments, in the closed position, the first ladder frame 2 and the mounting frame 1 are superimposed on each other, for example, the first ladder frame 2 is superimposed on the mounting frame 1, and the first ladder frame 2 is substantially parallel to the mounting frame 1, that is, the plane where the first ladder frame 2 is located is substantially parallel to the plane where the mounting frame 1 is located. Optionally, in the closed position, the first ladder frame 2 is sleeved on the outside of the mounting frame 1, so that the first ladder frame 2 and the mounting frame 1 are in the same plane. Advantageously, in the closed position, the first ladder frame 2 is located inside the mounting frame 1, so that the first ladder frame 2 and the mounting frame 1 are in the same plane, and the mounting frame 1 can protect the first ladder frame 2 from damage, such as Figure 1 and Figure 2 shown.

[0096] In the extended position, the first ladder frame 2 is unfolded from the mounting frame 1, that is, the first ladder frame 2 is pivoted away from the mounting frame 1 so that the first ladder frame 2 intersects with the mounting frame 1, that is, the plane where the first ladder frame 2 is located intersects with the plane where the mounting frame 1 is located. Figure 12-14 and Figure 16 and Figure 17 shown.

[0097] Here, it should be understood that the closed position refers to the extreme position to which the first ladder frame 2 can swing in the direction close to the mounting frame 1, that is, the angle α between the first ladder frame 2 and the mounting frame 1 is the smallest. Preferably, the angle α is zero degrees. Figure 1 and 2 The open position refers to the extreme position to which the first ladder frame 2 swings away from the mounting frame 1, that is, the angle α between the first ladder frame 2 and the mounting frame 1 is the largest, preferably 30 degrees, as shown. Figure 12-14 and Figure 16 and Figure 17 shown.

[0098] It can be understood that, in the process of swinging from the closed position to the open position or from the open position to the closed position, the angle α between the first ladder frame 2 and the mounting frame 1 gradually changes, for example, the angle α gradually increases from zero to 30 degrees, or decreases from 30 degrees to zero. In this process, the position of the first ladder frame 2 can be called the middle position of the swing, such as Figure 11 shown.

[0099] In some embodiments, in the extended position, the second ladder frame 3 slides in a direction away from the connection between the first ladder frame 2 and the mounting frame 1 to extend beyond the first ladder frame 2 by a first predetermined length, such as Figure 14 shown.

[0100] In the retracted position, the second ladder frame 3 does not extend beyond the first ladder frame 2. Optionally, the second ladder frame 3 extends beyond the first ladder frame 2 by a second predetermined length, which is less than the first predetermined length.

[0101] It can be understood that the extended position refers to the extreme position to which the second ladder frame 3 can slide in a direction away from the connection between the first ladder frame 2 and the mounting frame 1, that is, the first predetermined length is the maximum. Figure 14 and Figure 16-17 The retracted position refers to the limit position to which the second ladder frame 3 can slide in the direction close to the connection between the first ladder frame 2 and the mounting frame 1, that is, the second predetermined length is the minimum, as shown in FIG. Figure 1-Figure 2 and Figure 11-13 It can be understood that the position of the second ladder frame 3 between the extended position and the retracted position can be referred to as a sliding intermediate position.

[0102] In some embodiments, as Figure 1-Figure 3 、 Figure 11-14 and Figure 16-17 As shown, the ladder assembly 100 further includes a connecting rod 4 and a locking member 5. A first connecting rod end 41 of the connecting rod 4 is pivotally connected to the mounting frame 1, for example, via a pivot, and is slidable relative to the mounting frame 1. A second connecting rod end 42 of the connecting rod 4 is pivotally connected to the first ladder frame 2, for example, via a pivot. In the illustrated embodiment, two connecting rods 4 and two locking members 5 are provided, one on each of the left and right sides of the mounting frame 1.

[0103] The locking member 5 is slidably mounted on the mounting frame 1 and is connected to the first connecting rod end 41 of the connecting rod 4. The locking member 5 has a locking state and a releasing state. Figure 1-Figure 3 , Figure 9 , Figure 13-14 and Figure 16-17 As shown, in the locked state, the locking member 5 locks the first link end 41 by pressing the first link end 41 against the mounting frame 1, thereby preventing the first link end 41 from sliding along the mounting frame 1, thereby preventing the link 4 from rotating relative to the mounting frame 1, and further preventing the first ladder frame 2 from swinging relative to the mounting frame 1. Figure 10-12 As shown, in the released state, the locking component 5 releases the first link end 41, and a gap G is formed between the first link end 41 and the mounting frame 1 to allow the first link end 41 to slide along the mounting frame 1, thereby allowing the link 4 to rotate relative to the mounting frame 1, and further allowing the first ladder frame 2 to swing relative to the mounting frame 1.

[0104] In some embodiments, the ladder assembly 100 includes a stop pin 6, which is provided on the first ladder frame 2 and is used to stop the second ladder frame 3 to limit the extension length of the second ladder frame 3 relative to the first ladder frame 2, for example, to limit the extension position of the second ladder frame 3, such as Figure 19 shown.

[0105] like Figures 8-10As shown, in some examples, the locking component 5 includes an actuating rod 51, an abutment platform 52, and a handle 53. The handle 53 is used to drive the actuating rod 51. The handle 53 includes a grip portion 532, a cam portion 531, and a stop protrusion 533. The grip portion 532 is used for a user to grip to operate the handle 53. The grip portion 532 has a connecting end 5301 and a free end 5302. The cam portion 531 is provided at the connecting end 5301 of the grip portion 532, and the stop protrusion 533 is provided on the grip portion 532. The first connecting end 511 of the actuating rod 51 is connected to the first connecting rod end 41 through the connecting bolt 54, and the second connecting end 512 of the actuating rod 51 is pivotally connected to the cam portion 531 through the third pivot 55. The cam surface of the cam portion 531 abuts against the abutment platform 52. When the handle 53 rotates, the actuating rod 51 is driven to move along its axial direction to lock and release the connecting rod 4. The limiting protrusion 533 is used to stop the mounting frame 1 to limit the rotation of the handle 53. When the locking component 5 is in the locked state, the limiting protrusion 533 stops the mounting frame 1.

[0106] like Figure 6-7B and Figure 19 As shown, the ladder assembly 100 includes a fastening component 7, which is provided on one of the first ladder frame 2 and the second ladder frame 3 and stops at the other of the first ladder frame 2 and the second ladder frame 3. The fastening component 7 is used to dampen the sliding of the second ladder frame 3 relative to the first ladder frame 2, thereby preventing the second ladder frame 3 from accidentally sliding relative to the first ladder frame 2 by its own gravity, and allowing the second ladder frame 3 to slide relative to the first ladder frame 2 under external force. For example, a user pulling the second ladder frame 3 can overcome the damping force of the fastening component 7 and slide relative to the first ladder frame 2.

[0107] In some embodiments, as Figure 3 and Figure 4 As shown, the mounting frame 1 is a generally rectangular frame. Specifically, the mounting frame 1 includes two side frame beams 110 and two transverse frame beams 111. The two side frame beams 110 extend in parallel with each other in the vertical direction and are spaced apart from each other. One transverse frame beam 111 is detachably connected between the upper ends of the two side frame beams 110, and the other transverse frame beam 111 is detachably connected between the lower ends of the two side frame beams 110. Figure 4 In the illustrated embodiment, there are two transverse frame beams 111 , but the embodiments of the present invention are not limited thereto. For example, three or four transverse frame beams 111 may be provided.

[0108] like Figure 4 As shown, in some specific examples, the side frame beam 110 includes an upper beam section 1101 and a lower beam section 1102. The upper beam section 1101 and the lower beam section 1102 can be made in one piece or be detachably connected. Figure 1As shown, the lower beam section 1102 extends substantially in the vertical direction, and the upper beam section 1101 extends upward and backward from the upper end of the lower beam section 1102 to facilitate the installation of the mounting frame 1 on the vehicle. Of course, the upper beam section 1101 and the lower beam section 1102 can extend coaxially, for example, along the longitudinal direction of the mounting frame 1. Figure 1 Here, it should be understood that when the upper beam section 1101 extends obliquely relative to the lower beam section 1102, the plane on which the mounting frame 1 is located refers to the plane defined by the two lower beam sections 1102, and the angle α between the first ladder frame 2 and the mounting frame 1 refers to the angle between the first ladder frame 2 and the plane defined by the two lower beam sections 1102.

[0109] like Figure 4 As shown, the lower beam section 1102 of the side frame beam 110 is provided with a guide groove 12 extending along the longitudinal direction of the lower beam section 1102 and passing through the thickness direction of the lower beam section 1102. The guide groove 12 can be straight or arc-shaped, preferably straight. The first link end 41 of the connecting rod 4 can slide along the guide groove 12, and the first connecting end 511 of the actuating rod 51 of the locking component 5 passes through the guide groove and is connected to the first link end 41 of the connecting rod 4. The actuating rod 51 can slide along the guide groove 12.

[0110] The inner side surface of the lower beam section 1102 is provided with a receiving groove 11, which provides a space for the rotation of the connecting rod 14. In the closed position, the connecting rod 4 is accommodated in the receiving groove 11. Figure 1 and Figure 2 As shown, the ladder assembly 100 is provided with compact structure.

[0111] In some embodiments, the first end 121 and the second end 122 of the guide groove 12 are respectively provided with a locking groove, and the first connecting rod end 41 of the connecting rod 4 can slide into and be locked in the locking groove (not shown), thereby preventing the first connecting rod end 41 from sliding along the guide groove 12. The user can pull the first ladder frame 2 to make the first connecting rod end 41 escape from the locking groove and slide along the guide groove 12. It is understandable that the locking groove can also function as the locking component 5, so the locking groove and the locking component 5 can be provided selectively. Of course, the locking groove and the locking component 5 can be provided at the same time to improve the reliability of the locking.

[0112] In some embodiments, the cross-sectional shape of the side frame beams 110 can be L-shaped. In the closed position, the first ladder frame 2 is located between the side frame beams 110 and rests on the inwardly extending portion of the side frame beams 110 , so that the side frame beams 110 can serve as a shell to protect the first ladder frame 2 .

[0113] like Figure 3 and 5As shown, the first ladder frame 2 is a generally rectangular frame and includes a first ladder side member 21 and a first ladder cross member 22. The two first ladder side members 21 extend parallel to each other and are spaced apart in the longitudinal direction F of the first ladder frame. The first ladder cross members 22 are detachably connected between the first ladder side members 21. In the illustrated embodiment, the first ladder frame 2 includes three first ladder cross members 22, connected between the upper ends, between the lower ends, and between the middle portions of the two first ladder side members 21. It will be appreciated that the number of first ladder cross members 22 is not limited to three.

[0114] like Figure 1-Figure 3 As shown, the upper end of the first ladder side member 21 is directly and pivotally connected to the side frame member 110 via a first pivot 13. More specifically, the first pivot 13 is located at the lower end of the upper beam section 1101 or the upper end of the lower beam section 1102. The first pivot 13 extends inward from the inner side surface of the side frame member 110 to fit within a pivot hole in the upper end of the first ladder side member 21. The first ladder side member 21 is provided with a first slide groove 23 extending along its longitudinal direction F. The second ladder frame 3 can be received in the first slide groove 23 and slide along the first slide groove 23.

[0115] Advantageously, in the closed position, the first ladder frame 2 is located within the mounting frame 1. In other words, the first ladder side beams 21 are located inside the side frame beams 110 and are side by side with each other, i.e., the plane defined by the longitudinal axes of the two first ladder side beams 21 coincides with the plane defined by the longitudinal axes of the two side frame beams 110, i.e., the two lower beam sections 1102, thereby further improving the structural compactness of the ladder assembly.

[0116] Alternatively, the first pivot 13 may extend outwardly from the outer surface of the side frame beam 110 to fit into the pivot hole at the upper end of the first ladder side beam 21. In the closed position, the first ladder side beams 21 are located outside the side frame beam 110 and side by side with each other.

[0117] Alternatively, the first pivot 13 may be provided on the front surface of the side frame beam 110. In the folded position, the first ladder frame 2 is superposed on the mounting frame 1.

[0118] like Figure 3 and Figure 6 As shown, the second ladder frame 3 is generally U-shaped and includes a second ladder side beam 31 and a second ladder cross beam 32. The second ladder cross beam 32 is detachably connected between the lower ends of the second ladder side beams 31. The second ladder side beam 31 is received in the first slide groove 23 and is slidable along the first slide groove 23.

[0119] In the retracted position, the second ladder side beam 31 is retracted into the first chute 23, and the second ladder cross beam 32 is located outside the first chute 23 and abuts against the lower end of the first ladder side beam 21. In the extended position, the upper end of the second ladder side beam 31 is located in the first chute 23, and most of the second ladder side beam 31 extends downward from the first chute 23.

[0120] Advantageously, as Figure 3 , Figure 6 , Figures 14-19 As shown, the second ladder side beam 31 includes an upper beam section 311 and a lower beam section 312. The upper end of the upper beam section 311 is provided with a receiving hole 3110. The lower end of the upper beam section 311 is pivotally and detachably connected to the upper end of the lower beam section 312 via a second pivot 35. In the extended position, the lower end of the upper beam section 311 and the lower beam section 312 slide out of the first slide groove 23, and the lower beam section 312 pivots relative to the upper beam section 311 by gravity so that the lower beam section 312 extends in the vertical direction, that is, a certain angle is formed between the upper beam section 311 and the lower beam section 312, as shown in FIG. Figure 16 and Figure 17 As shown, it is convenient for users to climb the ladder assembly.

[0121] In the extended position, the lower beam section 312 has a first state and a second state. In the first state, the upper beam section 311 is coaxial with the lower beam section 312. In the second state, the upper beam section 311 extends in the vertical direction and forms a certain angle with the lower beam section 312. Therefore, in the first state, the position of the second ladder frame 3 can be called the initial extended position, and in the second state, the position of the second ladder frame 3 can be called the final extended position.

[0122] like Figure 19 As shown, a stop portion 33 is provided at the upper end of the second ladder side beam 31, and a stop pin 6 is provided at the first ladder side beam 21. The stop pin 6 is used to stop the stop portion 33 to prevent the upper end of the second ladder side beam 31, i.e., the upper end of the upper side beam section 311, from escaping from the first slide groove 23, i.e., limiting the maximum length of the second ladder side beam 31 extending from the first slide groove 23, thereby limiting the extension position of the second ladder frame 3.

[0123] like Figure 3 , Figure 6 and Figures 14-19 As shown, the second ladder side beam 31 is provided with a second sliding groove 34 . Specifically, the second sliding groove 34 includes an upper sliding groove section 341 formed on the surface of the upper side beam section 311 and a lower sliding groove section 342 formed on the lower side beam section 312 .

[0124] like Figure 6 、 Figure 7A 、 Figure 7B and Figure 19 As shown, the fastening component 7 includes a first fastening component 71 and a second fastening component 72 .

[0125] Specifically, the first fastening component 71 includes a first fastening seat 710 having a first mounting hole 7101 , a first elastic member 711 , a first push rod 712 and a first push ball 713 .

[0126] The first fixing seat 710 is installed on the first ladder side beam 21, the inner end of the first push rod 712 is engaged in the first mounting hole 7101, the outer end of the first push rod 712 is provided with a first accommodating groove 7121, the first top ball 713 is rotatably accommodated in the first accommodating groove 7121, and a part of the first top ball 713 extends out from the first accommodating groove 7121.

[0127] The first elastic member 711 is located in the first mounting hole 7101 and is arranged between the first fixing seat 710 and the first push rod 712. The first elastic member 711 pushes the first push rod 712 in a direction away from the first fixing seat 710, so that the first push ball 713 stops at the bottom surface of the second slide groove 34, thereby providing damping for the sliding of the second ladder side beam 31.

[0128] Specifically, the second fastening component 72 includes a second fastening seat 720 , a second elastic member 721 , a second push rod 722 and a second push ball 723 . Second mounting holes 7201 are respectively provided at opposite ends of the second fastening seat 720 .

[0129] The second fixing seat 720 is mounted on the upper end of the second ladder side beam 31 and is located within the first chute 23. Specifically, a receiving hole 3110 is defined at the upper end of the upper beam section 311, and the second fixing seat 720 is disposed within the receiving hole 3110. The second fixing seat 720 is provided with a positioning hole 7202. A through hole 3111 is defined on the upper end surface of the upper beam section 311, communicating with the receiving hole 3110. A positioning pin 8 engages with the through hole 3111 and the positioning hole 7202, thereby positioning the second fixing seat 720 within the receiving hole 3110.

[0130] The inner end of the second top rod 722 fits in the second mounting hole 7201, and the outer end of the second top rod 722 is provided with a second accommodating groove 7221. The second top ball 723 is rotatably accommodated in the second accommodating groove 7221, and a part of the second top ball 723 extends out from the second accommodating groove 7221.

[0131] The second elastic member 721 is located in the second mounting hole 7201 and is arranged between the second fixing seat 720 and the second push rod 722. The second elastic member 721 pushes the second push rod 722 in the direction away from the second fixing seat 720, so that the two second top balls 723 respectively stop at the side surfaces of the first slide groove 23, thereby providing damping for the sliding of the second ladder side beam 31.

[0132] like Figure 6 and Figure 19 As shown, in the illustrated embodiment, the end of the second fastening seat 720 constitutes a stopper 33 stopped by the stopper 6.

[0133] In some embodiments, as Figure 6 、 Figure 15 and Figure 18As shown, the lower end surface of the upper beam section 311 is provided with an inclined first abutment surface 313. The upper end surface of the lower beam section 312 is provided with a second abutment surface 314 that is opposite and compatible with the first abutment surface 313. When the second ladder frame 3 slides to the extended position, the lower beam section 312 rotates relative to the upper beam section 311 and extends vertically. After the lower beam section 312 reaches the vertically extended position, the second abutment surface 314 abuts against the first abutment surface 313 to prevent the lower beam section 312 from further rotation.

[0134] In other embodiments, a ladder assembly 100 includes a mounting frame 1, a first ladder frame 2, a second ladder frame 3, a connecting rod 4, and a locking member 5. The first ladder frame 2 is pivotally connected to the mounting frame 1. The second ladder frame 3 is extendably and retractably connected to the first ladder frame 2. A first connecting rod end 41 of the connecting rod 4 is pivotally connected to the mounting frame 1, and a second connecting rod end 42 of the connecting rod 4 is pivotally connected to the first ladder frame 2. The locking member 5 is used to lock the first ladder frame 2 to prevent it from swinging relative to the mounting frame 1 and to release the first ladder frame 2 to allow it to swing relative to the mounting frame 1.

[0135] The ladder assembly 100 is movable between a closed state, an open state, and an extended state.

[0136] In the closed state, the first ladder frame 2 is swung into the mounting frame 1 and is side by side with the mounting frame 1, and the second ladder frame 3 is retracted relative to the first ladder frame 2. In other words, the first ladder frame 2 is in the closed position. Advantageously, the first ladder side beam 21 is located on the inner side of the lower beam section 1102 of the side frame beam 110 and is side by side. The second ladder frame 3 is in the retracted position, the second ladder side beam 31 is retracted into the first slide groove 23, and the second ladder cross beam 23 is stopped against the lower end of the second ladder side beam 31 and is located above the cross frame beam 111.

[0137] In the open state, the first ladder frame 2 is swung out from the mounting frame 1 to the open position, and the first ladder frame 2 forms a predetermined angle α with the mounting frame 1. In the open state, the second ladder frame 3 can be in the retracted position or the extended position.

[0138] In the extended state, the first ladder frame 2 swings out from the mounting frame 1 to an open position. The first ladder frame 2 forms a predetermined angle α with the mounting frame 1. The second ladder side beam 31 extends from the first slide groove 23, and the upper end of the upper beam section 311 is located in the first slide groove 23. In the extended state, the lower beam section can have a first and a second state. In the first state, the lower beam section 312 is coaxial with the upper beam section 311. In the second state, the lower beam section 312 extends vertically and forms a predetermined angle with the upper beam section 311. When the lower beam section 312 is in the first state, the state of the ladder assembly 100 can be referred to as the initial extended state. When the lower beam section 312 is in the second state, the state of the ladder assembly 100 can be referred to as the final extended state.

[0139] The operation and functioning of the ladder assembly 100 according to the embodiment of the present invention will be described below.

[0140] like Figure 1 and Figure 2 As shown, when not in use, the ladder assembly 100 is in a closed state, the first ladder frame 2 is located inside the mounting frame 1, the second ladder frame 3 is retracted into the first slide groove 23 of the first ladder frame 2, and the locking component 5 is in a locked state, thereby preventing the first ladder frame 2 from accidentally swinging relative to the mounting frame 1.

[0141] like Figure 11 As shown, when the ladder assembly 100 is used, the grip portion 532 is rotated upward, thereby releasing the connecting rod 4 from the locking member 5. The user pulls the first ladder frame 2 forward to swing it out of the mounting frame 1. During the swinging process, the first connecting rod end 41 of the connecting rod 4 and the locking member 5 slide downward along the guide groove 12, and the connecting rod 4 rotates relative to the mounting frame 1 and the first ladder frame 2. Figure 12 shown.

[0142] When the first ladder frame 2 reaches the extended position, for example, when the first link end 41 of the connecting rod 4 reaches the lower end of the guide slot 12, the gripping portion 532 is rotated downward, thereby locking the connecting rod 4 and preventing the first ladder frame 2 from swinging, that is, locking the first ladder frame 2 in the extended position. At this time, due to the damping effect of the fastening member 7, the second ladder frame 3 will not slide relative to the first ladder frame 2 toward the extended position without external force.

[0143] If the length of the first ladder frame 2 meets the requirement, the ladder assembly 100 can be climbed without sliding the second ladder frame 3 to the extended position.

[0144] If the length of the first ladder frame 2 does not meet the requirement, the user overcomes the damping of the fastening assembly 7 and pulls the second ladder frame 3 to slide from the first sliding groove 23 toward the extended position, such as Figure 14 Then release the second ladder frame 3, and the lower beam section 312 of the second ladder side beam 31 rotates downward to a vertical state relative to the upper beam section 311 by its own weight, that is, the lower beam section 312 extends in the vertical direction, as shown. Figure 16 and Figure 17 As shown, the user can then climb the ladder assembly 100 .

[0145] After use, the user first rotates the lower beam section 312 of the second ladder side member 31 from a vertical position to a coaxial position with the upper beam section 311. Then, the user pushes the second ladder side member 31 into the first slide groove 23, overcoming the resistance of the fastening assembly 7. Next, the user operates the locking member 5 to the released position and then pushes the first ladder frame 2 rearward to the closed position. Finally, the user operates the locking member 5 to the locked position, thereby locking the first ladder frame 2 relative to the mounting frame 1.

[0146] The following describes the vehicle of the embodiment of the present utility model. Figure 20 As shown, a vehicle 200 according to an embodiment of the present invention includes a vehicle body 201 and a ladder assembly. The ladder assembly may be the ladder assembly 100 according to the above embodiment. The ladder assembly 100 is mounted on the vehicle body 201 .

[0147] Specifically, if Figure 20 As shown, a luggage rack 202 is provided on the vehicle body 201 and is located on the top of the vehicle body 201. The ladder assembly 100 is provided on the side of the vehicle body 201 and is connected to the luggage rack 202. The lower beam section 1102 of the mounting frame 1 is located on the side of the vehicle body 201, and the upper beam section 1101 extends upward from the side of the vehicle body 201 at an angle and is connected to the luggage rack 202.

[0148] The user can reach the top roof of the vehicle body by climbing up the ladder assembly 100. The ladder assembly 100 has a compact structure, requires little space for operation, and reduces wind resistance.

[0149] It is understandable that the ladder assembly is not limited to being arranged on the side of the vehicle body, and optionally, the ladder assembly can be arranged on the back of the vehicle body. The ladder assembly is not limited to being used in vehicles, and can also be used in other suitable occasions.

[0150] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0151] Furthermore, the terms "first" and "second" are used solely for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0152] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0153] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0154] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0155] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A ladder assembly, characterized in that: include: Mounting frame (1); a first ladder frame (2) pivotally connected to the mounting frame (1) so that the first ladder frame (2) swings relative to the mounting frame (1) between a closed position and an open position; A second ladder frame (3) is slidably connected to the first ladder frame (2) so that the second ladder frame (3) moves between an extended position and a retracted position relative to the first ladder frame (2).

2. The ladder assembly according to claim 1, characterized in that: In the closed position, the first ladder frame (2) and the mounting frame (1) are stacked on each other, the first ladder frame (2) is located inside the mounting frame (1), or the first ladder frame (2) is sleeved outside the mounting frame (1); In the open position, the first ladder frame (2) is unfolded from the mounting frame (1) so that the plane where the first ladder frame (2) is located intersects the plane where the mounting frame (1) is located.

3. The ladder assembly according to claim 1, characterized in that: In the extended position, the second ladder frame (3) extends beyond the first ladder frame (2) by a first predetermined length, and in the retracted position, the second ladder frame (3) does not extend beyond the first ladder frame (2) or extends beyond the first ladder frame (2) by a second predetermined length, wherein the second predetermined length is less than the first predetermined length.

4. The ladder assembly according to claim 1, characterized in that: The first ladder frame (2) is directly pivotally connected to the mounting frame (1) via a first pivot (13).

5. The ladder assembly according to claim 4, characterized in that: The first pivot (13) extends inwardly from an inner side surface of the mounting frame (1), wherein in the closed position, the first ladder frame (2) is located within the mounting frame (1) so that a plane on which the first ladder frame (2) is located coincides with a plane on which the mounting frame (1) is located; Alternatively, the first pivot (13) extends outward from the outer side of the mounting frame (1), wherein in the closed position, the first ladder frame (2) is sleeved on the outer side of the mounting frame (1) so that the plane where the first ladder frame (2) is located coincides with the plane where the mounting frame (1) is located; Alternatively, the first pivot (13) is provided on the front surface of the mounting frame (1), wherein in the closed position, the first ladder frame (2) is superimposed on the mounting frame (1).

6. The ladder assembly according to any one of claims 1 to 5, characterized in that: The ladder assembly further comprises a connecting rod (4), a first connecting rod end (41) of the connecting rod (4) being pivotally connected to the mounting frame (1) and slidable relative to the mounting frame (1), and a second connecting rod end (42) of the connecting rod (4) being pivotally connected to the first ladder frame (2).

7. The ladder assembly according to claim 6, characterized in that: The mounting frame (1) is provided with a guide groove (12), the first connecting rod end (41) is slidable along the guide groove (12), the inner side surface of the mounting frame (1) is provided with a receiving groove (11), and in the closed position, the connecting rod (4) is accommodated in the receiving groove (11).

8. The ladder assembly according to claim 7, characterized in that: The first end (121) and the second end (122) of the guide groove (12) are respectively provided with a clamping groove, and the first connecting rod end (41) can slide into the clamping groove to prevent the first connecting rod end (41) from sliding along the guide groove (12).

9. The ladder assembly according to claim 7, characterized in that: The ladder assembly further comprises a locking component (5) having a locking state and a releasing state, wherein the locking component (5) is slidably mounted on the mounting frame (1) along the guide groove (12) and is connected to the first connecting rod end (41), wherein in the locking state, the locking component (5) presses the connecting rod (4) onto the mounting frame (1) to prevent the first connecting rod end (41) from sliding along the guide groove (12), thereby preventing the connecting rod (4) from rotating relative to the mounting frame (1), and in the releasing state, the locking component (5) releases the connecting rod (4) to allow the first connecting rod end (41) to slide along the guide groove (12), thereby allowing the connecting rod (4) to rotate relative to the mounting frame (1).

10. The ladder assembly according to claim 9, characterized in that: The locking component (5) comprises an actuating rod (51), an abutting platform (52) and a handle (53) for driving the actuating rod (51); the handle (53) comprises a gripping portion (532), a cam portion (531) and a limiting protrusion (533); the gripping portion (532) has a connecting end and a free end; the cam portion (531) is provided at the connecting end of the gripping portion (532); the limiting protrusion (533) is provided on the gripping portion (532); The first connecting end (511) of the actuating rod (51) is connected to the first connecting rod end (41), and the second connecting end (512) of the actuating rod (51) is pivotally connected to the cam portion (531). The cam surface of the cam portion (531) abuts against the abutment platform (52), so that when the handle (53) rotates, the actuating rod (51) is driven to lock and release the connecting rod (4), and the limiting protrusion (533) is used to stop the mounting frame (1).

11. The ladder assembly according to claim 6, characterized in that: The ladder assembly further comprises a stop pin (6), which is provided on the first ladder frame (2) and is used to stop the second ladder frame (3) to limit the extension length of the second ladder frame (3) relative to the first ladder frame (2).

12. The ladder assembly according to claim 1, wherein: The first ladder frame (2) comprises a first ladder side beam (21) and a first ladder cross beam (22), wherein the first ladder side beams (21) are arranged parallel to each other and spaced apart, the first ladder cross beam (22) is connected between the first ladder side beams (21), and the first ladder side beams (21) are provided with a first sliding groove (23) extending longitudinally thereof; The second ladder frame (3) comprises a second ladder side beam (31) and a second ladder cross beam (32), wherein the second ladder cross beam (32) is connected between the lower ends of the second ladder side beams (31), and the second ladder side beam (31) is slidable along the first chute (23), wherein in the retracted position, the second ladder side beam (31) is retracted into the first chute (23), and the second ladder cross beam (32) is located outside the first chute (23) and abuts against the lower end of the first ladder side beam (21); The upper end of the second ladder side beam (31) is provided with a stop portion (33), and the first ladder side beam (21) is provided with a stop pin (6), and the stop pin (6) is used to stop the stop portion (33) to prevent the upper end of the second ladder side beam (31) from escaping from the first sliding groove (23).

13. The ladder assembly according to claim 12, characterized in that: The ladder assembly further comprises a fastening component (7), which is arranged on one of the first ladder side beam (21) and the second ladder side beam (31) and stops against the other of the first ladder side beam (21) and the second ladder side beam (31), and is used to dampen the sliding of the second ladder frame (3) relative to the first ladder frame (2), so as to prevent the second ladder frame (3) from sliding relative to the first ladder frame (2) by its own weight and allow the second ladder frame (3) to slide relative to the first ladder frame (2) under the pull of an external force.

14. The ladder assembly according to claim 13, wherein: The fastening component (7) includes a first fastening component (71) and a second fastening component (72); the second ladder side beam (31) is provided with a second sliding groove (34); The first fastening component (71) comprises a first fastening seat (710) having a first mounting hole (7101), a first elastic member (711), a first push rod (712) and a first push ball (713); the first fastening seat (710) is mounted on the first ladder side beam (21); the inner end of the first push rod (712) is fitted into the first mounting hole (7101); the outer end of the first push rod (712) is provided with a first accommodating groove (7121); the first push ball (713) is rotatably accommodated in the first ladder side beam (21); In the first accommodating groove (7121), a portion of the first top ball (713) extends out from the first accommodating groove (7121), the first elastic member (711) is located in the first mounting hole (7101) and is provided between the first fastening seat (710) and the first top rod (712), and the first elastic member (711) pushes the first top rod (712) in a direction away from the first fastening seat (710) so that the first top ball (713) stops against the bottom surface of the second sliding groove (34); The second fastening component (72) includes a second fastening seat (720), a second elastic member (721), a second push rod (722) and a second push ball (723). The second fastening seat (720) is provided with second mounting holes (7201) at opposite ends thereof. The second fastening seat (720) is mounted on the upper end of the second ladder side beam (31). The inner end of the second push rod (722) is fitted in the second mounting hole (7201). The outer end of the second push rod (722) is provided with a second accommodating groove (7221). The second push ball (72 3) is rotatably accommodated in the second accommodating groove (7221), a portion of the second top ball (723) extends out from the second accommodating groove (7221), the second elastic member (721) is located in the second mounting hole (7201) and is provided between the second fastening seat (720) and the second top rod (722), and the second elastic member (721) pushes the second top rod (722) in a direction away from the second fastening seat (720) so that the second top ball (723) stops against the side of the first slide groove (23).

15. The ladder assembly according to claim 12, wherein: The second ladder side beam (31) includes an upper beam section (311) and a lower beam section (312), wherein the lower end of the upper beam section (311) is pivotally connected to the upper end of the lower beam section (312), wherein in the extended position, the lower ends of the lower beam section (312) and the upper beam section (311) are out of the first chute (23), and the lower beam section (312) pivots relative to the upper beam section (311) by gravity so that the lower beam section (312) extends in the vertical direction.

16. The ladder assembly according to any one of claims 12 to 15, characterized in that: The mounting frame (1) comprises side frame beams (110) and transverse frame beams (111), the side frame beams (110) are arranged parallel to each other and spaced apart, the transverse frame beams (111) are connected between the side frame beams (110), in the closed position, the first ladder side beams (21) are located inside the side frame beams (110) and are arranged side by side, the inner side surfaces of the side frame beams (110) are provided with accommodating grooves (11), and the side frame beams (110) are provided with guide grooves (12); The ladder assembly further comprises a connecting rod (4) and a locking component (5); a first connecting rod end (41) of the connecting rod (4) is connected to the side frame beam (110); a second connecting rod end (42) of the connecting rod (4) is pivotally connected to the first ladder frame (2); in the closed position, the connecting rod (4) is accommodated in the accommodating groove (11); The locking component (5) is slidably mounted on the mounting frame (1) along the guide groove (12) and is connected to the first link end (41). The locking component (5) is used to press the link (4) onto the side frame beam (110) to prevent the first link end (41) from sliding and to release the link (4) from the side frame beam (110) to allow the first link end (41) to slide.

17. A ladder assembly, characterized in that: include: Mounting frame (1); a first ladder frame (2), the first ladder frame (2) being pivotally connected to the mounting frame (1); a second ladder frame (3), the second ladder frame (3) being connected to the first ladder frame (2) in an extendable and retractable manner; A connecting rod (4), wherein a first connecting rod end (41) of the connecting rod (4) is pivotally connected to the mounting frame (1), and a second connecting rod end (42) of the connecting rod (4) is pivotally connected to the first ladder frame (2); a locking component (5) for locking the first ladder frame (2) to prevent the first ladder frame (2) from swinging relative to the mounting frame (1) and for releasing the first ladder frame (2) to allow the first ladder frame (2) to swing relative to the mounting frame (1); The ladder assembly can move between the following states: a closed state, wherein the first ladder frame (2) is swung into the mounting frame (1) and is aligned with the mounting frame (1), and the second ladder frame (3) is retracted relative to the first ladder frame (2); an open state, wherein the first ladder frame (2) is swung out from the installation frame (1) and forms a predetermined angle with the installation frame (1); An extended state, wherein the first ladder frame (2) is swung out from the mounting frame (1) to form a predetermined angle with the mounting frame (1), and the second ladder frame (3) is extended relative to the first ladder frame (2).

18. A ladder assembly, characterized in that: include: A mounting frame (1), the mounting frame (1) comprising side frame beams (110) and transverse frame beams (111), the side frame beams (110) being arranged parallel to each other and spaced apart, the transverse frame beams (111) being connected between the side frame beams (110), the side frame beams (110) being provided with guide grooves (12) extending longitudinally thereof, and the inner side surfaces of the side frame beams (110) being provided with accommodating grooves (11); a first ladder frame (2), the first ladder frame (2) comprising a first ladder side beam (21) and a first ladder cross beam (22), the first ladder side beams (21) being arranged parallel to each other and spaced apart, the first ladder cross beam (22) being connected between the first ladder side beams (21), the first ladder side beam (21) being provided with a first slide groove (23) extending longitudinally thereof, the upper end of the first ladder side beam (21) being pivotally connected to the side frame beam (110), the first ladder frame (2) being able to swing into the mounting frame (1) so that the first ladder side beam (21) and the side frame beam (110) are side by side and located inside the side frame beam (110), and the first ladder frame (2) being able to swing out of the mounting frame (1) so that the first ladder side beam (21) and the side frame beam (110) intersect; A second ladder frame (3), the second ladder frame (3) includes a second ladder side beam (31) and a second ladder cross beam (32), the second ladder side beam (31) includes an upper side beam section (311) and a lower side beam section (312), the lower end of the upper side beam section (311) is pivotally connected to the upper end of the lower side beam section (312), the second ladder cross beam (32) is connected between the lower ends of the lower side beam sections (312), the second ladder side beam (31) is slidably arranged in the first sliding groove (23), the The second ladder side beam (31) can be retracted into the first slide groove (23) and the second ladder cross beam (32) is located outside the first slide groove (23) to abut against the lower end of the first ladder frame (2); the second ladder side beam (31) can extend out of the first slide groove (23), so that the lower end of the upper beam section (311) and the lower beam section (312) are located outside the first slide groove (23) and the lower beam section (312) rotates relative to the upper beam section (311) to extend in the vertical direction; A connecting rod (4), wherein a first connecting rod end (41) of the connecting rod (4) is pivotally connected to the side frame beam (110) and is slidable along the guide groove (12), and a second connecting rod end (42) of the connecting rod (4) is pivotally connected to the first ladder side beam (21); A locking component (5) is provided for releasably locking the connecting rod (4) to prevent and allow the first connecting rod end (41) to slide along the guide slot (12), thereby preventing and allowing the first ladder frame (2) to swing relative to the mounting frame (1).

19. A ladder assembly, characterized in that: include: Mounting frame (1); a first ladder frame (2), the first ladder frame (2) being pivotally connected to the mounting frame (1), the first ladder frame (2) being capable of swinging into the mounting frame (1) and out of the mounting frame (1); A second ladder frame (3), the second ladder frame (3) includes a first part and a second part, the lower end of the first part is pivotally connected to the upper end of the second part, the second ladder frame (3) is slidably connected to the first ladder frame (2), the second ladder frame (3) can be extended relative to the first ladder frame (2) so that the lower end of the first part and the second part exceed the first ladder frame (2) and the second part is oriented in a vertical direction, and the second ladder frame (3) can be retracted relative to the first ladder frame (2) so that the lower end of the second part stops at the lower end of the first ladder frame (2).

20. A vehicle, characterized in that: include: body (201); A ladder assembly (100), wherein the ladder assembly (100) is the ladder assembly according to any one of claims 1 to 19, and the ladder assembly (100) is installed on the vehicle body (201).

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