Crawling ladder assembly and vehicle

Abstract

The embodiment of the invention 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 can swing between a closed position and an open 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 closed position and the open 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 invention relates to the technical field of ladders, and in particular to a ladder assembly and a vehicle. Background Art

[0002] In the related art, a vehicle ladder usually includes an upper ladder frame and a lower ladder frame. The upper ladder frame is mounted on the vehicle body through a connecting rod, so that the upper ladder frame, the connecting rod and the vehicle body form a four-bar linkage, thereby realizing that the upper ladder frame can be folded onto the vehicle body or extended outward from the vehicle body. When in use, the weight of the human body is mainly borne by the connecting rod, and there are problems of poor structural strength and stability, which affects the usability. In the related art, the lower ladder frame is rotatably connected to the lower ladder frame through a pivot. When not in use, the user flips and folds the lower ladder frame onto the upper ladder frame. When in use, the user flips and unfolds the lower ladder frame from the upper ladder frame. The folding and unfolding rotation of the lower ladder frame requires a large space, and the volume of the ladder after folding is large. The folding and unfolding operation of the lower ladder frame is laborious, and it is inconvenient to use. Summary of the invention

[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, an embodiment of the present invention provides a ladder assembly, which has a small space occupied by a ladder frame, a simple structure, high stability and structural strength, and is easy and convenient to operate and use.

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

[0005] The ladder assembly of the embodiment of the present invention comprises:

[0006] Install the frame;

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

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

[0010] Install the frame;

[0011] a first ladder frame pivotally connected to the mounting frame;

[0012] a second ladder frame, the second ladder frame being extendably and retractably connected to the first ladder frame;

[0013] 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;

[0014] 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;

[0015] The ladder assembly can move between the following states:

[0016] 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;

[0017] an open state, wherein the first ladder frame is swung out from the mounting frame and forms a predetermined angle with the mounting frame;

[0018] The extended state includes the first ladder frame swinging out from the mounting frame to form a predetermined angle with the mounting frame, and the second ladder frame extending relative to the first ladder frame.

[0019] The ladder assembly of the embodiment of the present invention 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, has high structural strength and stability, and is simple, convenient, and labor-saving to operate and use.

[0020] The vehicle in the embodiment of the present invention 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.

[0021] The vehicle of the embodiment of the present invention has a ladder assembly with a small volume and small occupied space, high structural strength and stability, simple and convenient operation and use, labor-saving, and low vehicle wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional 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;

[0023] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the ladder assembly from another perspective;

[0024] Figure 3 is an exploded schematic diagram of a ladder assembly according to an embodiment of the present invention;

[0025] Figure 4 is an exploded schematic diagram of a mounting frame of a ladder assembly according to an embodiment of the present invention;

[0026] Figure 5 is an exploded schematic diagram of a first ladder frame of a ladder assembly according to an embodiment of the present invention;

[0027] Figure 6 is an exploded schematic diagram of a second ladder frame of a ladder assembly according to an embodiment of the present invention;

[0028] Fig. 7A is a cross-sectional schematic diagram of a first fastening component of a ladder assembly according to an embodiment of the present invention;

[0029] Figure 7B is a cross-sectional schematic diagram of a second fastening component of a ladder assembly according to an embodiment of the present invention;

[0030] Figure 8 is an exploded schematic diagram of a locking component of a ladder assembly according to an embodiment of the present invention;

[0031] Fig. 9 is a partial cross-sectional schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the locking component is in a locked state;

[0032] Fig.10 is a partial cross-sectional schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the locking component is in a released state;

[0033] Fig.11 is a three-dimensional schematic diagram of a ladder assembly according to an embodiment of the present invention, wherein the first ladder frame swings from a closed position toward an open position, the second ladder frame is in a retracted position, and the locking component is in a released state;

[0034] Fig.12 is a three-dimensional 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 a retracted position, and the locking component is in a released state;

[0035] Fig.13 is a three-dimensional 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 a retracted position, and the locking component is in a locked state;

[0036] Fig.14 is a three-dimensional 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 component is in a locked state, and the lower beam section of the second ladder frame is substantially coaxial with the lower beam section;

[0037] Fig.15 yes Fig.14 A partial schematic diagram of the ladder assembly shown;

[0038] Fig.16is a three-dimensional 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 component 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 substantially vertical direction;

[0039] Fig.17 yes Fig.16 A schematic side view of the ladder assembly shown;

[0040] Fig.18 yes Fig.16 A partial schematic diagram of the ladder assembly shown;

[0041] Fig.19 yes Fig.16 Another partial schematic diagram of the ladder assembly shown;

[0042] Fig. 20 Schematic diagram of a vehicle according to an embodiment of the present invention.

[0043] Reference numerals:

[0044] 100. Ladder assembly;

[0045] 200, vehicle; 201, vehicle body; 202, luggage rack;

[0046] 1. Mounting frame; 11. Accommodating 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;

[0047] 2. first ladder frame; 21. first ladder side beam; 22. first ladder cross beam; 23. first slideway;

[0048] 3. second ladder frame; 31. second ladder side beam; 311. upper side beam section; 3110. receiving hole; 3111. through hole; 312. lower side beam section; 313. first abutting surface; 314. second abutting surface; 32. second ladder cross beam; 33. stopper; 34. second slide groove; 341. upper slide groove section; 342. lower slide groove section; 35. second pivot;

[0049] 4. connecting rod; 41. first connecting rod end; 42. second connecting rod end;

[0050] 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. Position limiting convex; 5301. Connecting end; 5302. Free end; 54. Connecting bolt; 55. Third pivot; G. Gap;

[0051] 6. Stop pin;

[0052] 7. Fastening component; 71. First fastening component; 710. First fastening seat; 7101. First mounting hole; 711. First elastic member; 712. First ejector rod; 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 rod; 7221. Second receiving groove; 723. Second ejector ball;

[0053] 8. Locating pin. DETAILED DESCRIPTION

[0054] 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.

[0055] The ladder assembly according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0056] like Figure 1-Figure 19 As 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 .

[0057] 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, Fig.11 The process of the first ladder frame 2 swinging from the closed position to the open position is shown.

[0058] 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. Fig.14 and Figure 16-17 The second ladder frame 3 is shown in the extended position.

[0059] When in 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, approach the roof.

[0060] In the ladder assembly of the embodiment of the present invention, the first ladder frame is opened from the mounting frame and closed to the mounting frame by swinging, and the second ladder frame is extended and retracted by sliding, and the user does not need to flip the second ladder frame, so the operation is simple and labor-saving. When in use, the first ladder frame and the mounting frame form a substantially triangular structure, so that the structural strength and stability are improved. In addition, the space required for operating the first ladder frame to swing and the second ladder frame to extend and retract is small, and no matter whether the first ladder frame is in the closed position or the opened position, the volume and space occupied by the ladder assembly are small, the structure is compact, and it is easy to install and use.

[0061] In some embodiments, in the closed position, the first ladder frame 2 and the mounting frame 1 are stacked on each other, for example, the first ladder frame 2 is stacked 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.

[0062] In the open 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 Fig.16 and Fig.17 shown.

[0063] 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, such as 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 Fig.16 and Fig.17 shown.

[0064] 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 degrees. In this process, the position of the first ladder frame 2 can be called the swing middle position, such as Fig.11 shown.

[0065] 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 Fig.14 shown.

[0066] 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.

[0067] 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. Fig.14 and Figure 16-17 The retracted position refers to the extreme 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. 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.

[0068] In some embodiments, Figure 1-Figure 3 , Figure 11-Figure 14 and Figure 16-17 As shown, the ladder assembly 100 further includes a connecting rod 4 and a locking component 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 the first connecting rod end 41 is slidable relative 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, for example, via a pivot. In the illustrated embodiment, there are two connecting rods 4 and two locking components 5, which are respectively located on the left and right sides of the mounting frame 1.

[0069] The locking component 5 is slidably mounted on the mounting frame 1, and the locking component 5 is connected to the first connecting rod end 41 of the connecting rod 4. The locking component 5 has a locking state and a releasing state. Figure 1-Figure 3 , Fig. 9 , Figure 13-Figure 14 and Figure 16-17 As shown, in the locked state, the locking component 5 locks the first link end 41 by pressing the first link end 41 onto 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.

[0070] In some embodiments, the ladder assembly 100 includes a stop pin 6, which is disposed 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 Fig.19 shown.

[0071] like Figure 8-Figure 10 As shown, in some examples, the locking component 5 includes an actuating rod 51, an abutment platform 52 and a handle 53, and the handle 53 is used to drive the actuating rod 51. The handle 53 includes a gripping portion 532, a cam portion 531 and a limiting protrusion 533. The gripping portion 532 is used for a user to grip to operate the handle 53, and the gripping 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 gripping portion 532, and 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 through a connecting bolt 54, and the second connecting end 512 of the actuating rod 51 is pivotally connected to the cam portion 531 through a 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 a locked state, the limiting protrusion 533 stops the mounting frame 1.

[0072] like Figure 6-7B and Fig.19 As shown, the ladder assembly 100 includes a fastening component 7, which is arranged 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 relying on its own gravity, and allowing the second ladder frame 3 to slide relative to the first ladder frame 2 under external force. For example, the user can pull the second ladder frame 3 to overcome the damping force of the fastening component 7 and slide relative to the first ladder frame 2.

[0073] In some embodiments, Figure 3 and Figure 4 As shown, the mounting frame 1 is a substantially 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 up-down 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.

[0074] 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 connected detachably. Figure 1 As 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 where 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.

[0075] 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 penetrating along the thickness direction of the lower beam section 1102. The guide groove 12 can be straight or arc-shaped, preferably straight. The first connecting rod 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 connecting rod end 41 of the connecting rod 4, and the actuating rod 51 can slide along the guide groove 12.

[0076] The inner side surface of the lower beam section 1102 is provided with a receiving groove 11, which provides an escape space for the rotation of the connecting rod 14, and in the closed position, the connecting rod 4 is accommodated in the receiving groove 11, as shown in FIG. Figure 1 and Figure 2 As shown, the ladder assembly 100 is provided with compact structure.

[0077] In some embodiments, 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 of the connecting rod 4 can slide into and be clamped in the clamping 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 clamping groove and slide along the guide groove 12. It can be understood that the clamping groove can play the function of the locking component 5, so the clamping groove and the locking component 5 can be selectively provided, and of course, the clamping groove and the locking component 5 can be provided at the same time, thereby improving the reliability of locking.

[0078] In some embodiments, the cross-sectional shape of the side frame beam 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 be used as a shell to protect the first ladder frame 2 .

[0079] like Figure 3 and 5 As shown, the first ladder frame 2 is a substantially rectangular frame and includes a first ladder side beam 21 and a first ladder cross beam 22. The two first ladder side beams 21 extend parallel to each other along the longitudinal direction F of the first ladder frame and are arranged at intervals. The first ladder cross beam 22 is detachably connected between the first ladder side beams 21. In the illustrated embodiment, the first ladder frame 2 includes three first ladder cross beams 22, which are respectively connected between the upper ends, between the lower ends, and between the middle parts of the two first ladder side beams 21. It can be understood that the number of the first ladder cross beams 22 is not limited to three.

[0080] like Figure 1-Figure 3 As shown, the upper end of the first ladder side beam 21 is directly connected to the side frame beam 110 through the first pivot 13. More specifically, the first pivot 13 is provided at the lower end of the upper beam section 1101 or the upper end of the lower beam section 1102, and the first pivot 13 extends inward from the inner side surface of the side frame beam 110 to fit into the pivot hole at the upper end of the first ladder side beam 21. The first ladder side beam 21 is provided with a first slide groove 23 extending along the longitudinal direction F thereof, and the second ladder frame 3 can be accommodated in the first slide groove 23 and slide along the first slide groove 23.

[0081] 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 arranged 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.

[0082] Optionally, 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 beam 21 is located outside the side frame beam 110 and side by side with each other.

[0083] 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.

[0084] 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, and 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 accommodated in the first slide groove 23 and is slidable along the first slide groove 23.

[0085] In the retracted position, the second ladder side beam 31 is retracted into the first slide groove 23, and the second ladder cross beam 32 is located outside the first slide groove 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 slide groove 23, and most of the second ladder side beam 31 extends downward from the first slide groove 23.

[0086] Advantageously, if Figure 3 , Figure 6 , Figure 14-Figure 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, and 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. Fig.16 and Fig.17 As shown, it is convenient for users to climb the ladder assembly.

[0087] 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.

[0088] like Fig.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 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.

[0089] like Figure 3 , Figure 6 and Figure 14-Figure 19 As shown, the second ladder side beam 31 is provided with a second slide groove 34 . Specifically, the second slide groove 34 includes an upper slide groove section 341 formed on the surface of the upper beam section 311 and a lower slide groove section 342 formed on the lower beam section 312 .

[0090] like Figure 6 , Fig. 7A , Figure 7B and Fig.19 As shown, the fastening component 7 includes a first fastening component 71 and a second fastening component 72 .

[0091] 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 .

[0092] The first fixing seat 710 is installed on the first ladder side beam 21, the inner end of the first top rod 712 is engaged in the first mounting hole 7101, the outer end of the first top 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.

[0093] 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.

[0094] Specifically, the second fixing component 72 includes a second fixing 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 fixing seat 720 .

[0095] The second fixing seat 720 is installed at the upper end of the second ladder side beam 31 and is located in the first slide groove 23. Specifically, the upper end of the upper beam section 311 is provided with a receiving hole 3110, and the second fixing seat 720 is provided in the receiving hole 3110. The second fixing seat 720 is provided with a positioning hole 7202, and the upper end surface of the upper beam section 311 is provided with a through hole 3111 communicating with the receiving hole 3110, and the positioning pin 8 is matched with the through hole 3111 and the positioning hole 7202, so as to position the second fixing seat 720 in the receiving hole 3110.

[0096] The inner end of the second top rod 722 fits in the second mounting hole 7201 , 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 .

[0097] 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 a 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.

[0098] like Figure 6 and Fig.19As shown, in the illustrated embodiment, the end of the second locking seat 720 constitutes a stopper 33 stopped by the stopper 6.

[0099] In some embodiments, Figure 6 , Fig.15 and Fig.18 As shown, the lower end surface of the upper beam section 311 is provided with an inclined first abutting surface 313. The upper end surface of the lower beam section 312 is provided with a second abutting surface 314 that is opposite to and matched with the first abutting 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 in the vertical direction. After the lower beam section 312 reaches the position of extending in the vertical direction, the second abutting surface 314 stops against the first abutting surface 313 to prevent the lower beam section 312 from continuing to rotate.

[0100] In other embodiments, the 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 component 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. The first connecting rod end 41 of the connecting rod 4 is pivotally connected to the mounting frame 1, and the second connecting rod end 42 of the connecting rod 4 is pivotally connected to the first ladder frame 2. The locking component 5 is used to lock the first ladder frame 2 to prevent the first ladder frame 2 from swinging relative to the mounting frame 1 and to release the first ladder frame 2 to allow the first ladder frame 2 to swing relative to the mounting frame 1.

[0101] The ladder assembly 100 is movable between a closed state, an open state, and an extended state.

[0102] 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 stops at the lower end of the second ladder side beam 31 and is located above the cross frame beam 111.

[0103] In the open state, the first ladder frame 2 swings 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 located in the retracted position or in the extended position.

[0104] In the extended state, the first ladder frame 2 swings out from the mounting frame 1 to the 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 in the vertical direction 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 called the initial extended state. When the lower beam section 312 is in the second state, the state of the ladder assembly 100 can be called the final extended state.

[0105] The operation and functioning of the ladder assembly 100 according to the embodiment of the present invention will be described below.

[0106] 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.

[0107] like Fig.11 As shown, when the ladder assembly 100 is used, the gripping portion 532 is rotated upward, so that the locking component 5 releases the connecting rod 4. 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 component 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. Fig.12 shown.

[0108] When the first ladder frame 2 reaches the extended position, for example, the first link end 41 of the link 4 reaches the lower end of the guide slot 12, the gripping portion 532 is rotated downward, thereby locking the link 4 to prevent 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 component 7, the second ladder frame 3 will not slide relative to the first ladder frame 2 toward the extended position without external force.

[0109] 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.

[0110] 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. Fig.14Then, the second ladder frame 3 is released, 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. Fig.16 and Fig.17 As shown, the user can then climb the ladder assembly 100 .

[0111] After use, the user first rotates the lower beam section 312 of the second ladder side beam 31 from a vertical state to a coaxial state with the upper beam section 311, and then pushes the second ladder side beam 31 into the first slide groove 23 to overcome the damping of the fastening assembly 7. Next, the user operates the locking component 5 to a released state, and then pushes the first ladder frame 2 backward to a closed position. Finally, the user operates the locking component 5 to a locked state, thereby locking the first ladder frame 2 relative to the mounting frame 1.

[0112] The following describes a vehicle according to an embodiment of the present invention. Fig. 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 .

[0113] Specifically, Fig. 20 As shown, a luggage rack 202 is provided on the vehicle body 201, and the luggage rack 202 is provided on the top of the vehicle body 201. The ladder assembly 100 is provided on the side of the vehicle body 201 and 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 upwardly obliquely from the side of the vehicle body 201 and is connected to the luggage rack 202.

[0114] 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.

[0115] 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.

[0116] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships are 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 limiting the present invention.

[0117] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0118] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0119] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0120] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0121] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art 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), the first ladder frame (2) being 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); A second ladder frame (3), 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).

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) overlap 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 with 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 the inner side of the mounting frame (1), wherein in the closed position, the first ladder frame (2) is located in 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) 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 arranged 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 received 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 arranged at the connecting end of the gripping portion (532); the limiting protrusion (533) is arranged 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) is rotated, 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 arranged on the first ladder frame (2) and is used to stop the second ladder frame (3) so as 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, characterized in that: The first ladder frame (2) comprises a first ladder side beam (21) and a first ladder cross beam (22), the first ladder side beams (21) are arranged in parallel and spaced apart from each other, the first ladder cross beam (22) is connected between the first ladder side beams (21), and the first ladder side beam (21) is provided with a first slide groove (23) extending in the longitudinal direction 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 beams (31) are slidable along the first slide groove (23), wherein in the retracted position, the second ladder side beam (31) is retracted into the first slide groove (23), and the second ladder cross beam (32) is located outside the first slide groove (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 fixing 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, characterized in that: The fastening component (7) comprises 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 fixing component (71) comprises a first fixing 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 fixing seat (710) is installed on the first ladder side beam (21); the inner end of the first push rod (712) is fitted 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 push ball (713) is rotatably accommodated in the first ladder side beam (21); In the first accommodating groove (7121), a part 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 fixing 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 fixing seat (710) so that the first top ball (713) stops against the bottom surface of the second sliding groove (34); The second fixing component (72) comprises a second fixing seat (720), a second elastic member (721), a second push rod (722) and a second push ball (723). The second fixing seat (720) is provided with second mounting holes (7201) at opposite ends thereof. The second fixing seat (720) is installed at 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 part of the second top ball (723) protrudes 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 fixing 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 fixing 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, characterized in that: The second ladder side beam (31) comprises 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 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.

16. The ladder assembly according to any one of claims 12 to 15, characterized in that: The mounting frame (1) comprises a side frame beam (110) and a transverse frame beam (111), the side frame beams (110) are arranged in parallel and spaced apart from each other, the transverse frame beam (111) is connected between the side frame beams (110), in the closed position, the first ladder side beam (21) is located inside the side frame beam (110) and is arranged side by side with each other, the inner side surface of the side frame beam (110) is provided with a receiving groove (11), and the side frame beam (110) is provided with a guide groove (12); The ladder assembly further comprises a connecting rod (4) and a locking component (5), wherein a first connecting rod end (41) of the connecting rod (4) is connected to the side frame beam (110), and a second connecting rod end (42) of the connecting rod (4) is pivotally connected to the first ladder frame (2), and 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 connecting rod end (41), and the locking component (5) is used to press the connecting rod (4) onto the side frame beam (110) to prevent the first connecting rod end (41) from sliding and to release the connecting rod (4) from the side frame beam (110) to allow the first connecting rod 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) swings 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: An installation frame (1), the installation frame (1) comprising a side frame beam (110) and a transverse frame beam (111), the side frame beams (110) being arranged in parallel and spaced apart from each other, the transverse frame beam (111) being connected between the side frame beams (110), the side frame beams (110) being provided with a guide groove (12) extending in the longitudinal direction thereof, and the inner side surface of the side frame beam (110) being provided with a receiving groove (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 in parallel and spaced apart from each other, 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 in the longitudinal direction 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 arranged side by side and are 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 each other; A second ladder frame (3), the second ladder frame (3) comprising a second ladder side beam (31) and a second ladder cross beam (32), the second ladder side beam (31) comprising an upper beam section (311) and a lower beam section (312), the lower end of the upper beam section (311) being pivotally connected to the upper end of the lower beam section (312), the second ladder cross beam (32) being connected between the lower ends of the lower beam sections (312), the second ladder side beam (31) being slidably disposed in the first slide 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) which releasably locks the connecting rod (4) to prevent and allow the first connecting rod end (41) to slide along the guide groove (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 able to swing into the mounting frame (1) and out of the mounting frame (1); A second ladder frame (3), the second ladder frame (3) comprises 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: Car body (201); A ladder assembly (100), wherein the ladder assembly (100) is the ladder assembly described in any one of claims 1 to 19, and the ladder assembly (100) is installed on the vehicle body (201).

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