Adjustable herringbone ladder

Abstract

The invention provides an adjustable herringbone ladder. The adjustable herringbone ladder comprises a base, a ladder body and a ladder body, the driving assembly comprises a driving part, a first moving seat and a second moving seat, the driving part is arranged on the base, and the first moving seat and the second moving seat are movably arranged on the base in the length direction of the base; the driving part is in driving connection with the first moving seat and the second moving seat to drive the first moving seat and the second moving seat to get close to each other or get away from each other; the angle between the first main ladder and the second main ladder is adjustably arranged, the lower end of the first main ladder is arranged on the first moving seat, and the lower end of the second main ladder is arranged on the second moving seat. According to the technical scheme provided by the invention, the problem that potential safety hazards occur due to the fact that the structure of a herringbone ladder is not firm when the herringbone ladder is used for crossing and spanning the electric wire in the related technology can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of telescopic ladders, and in particular to an adjustable herringbone ladder. Background Art

[0002] A common ladder is a single ladder frame structure, which includes two ladder bars arranged parallel to each other and a crossbar arranged between the two ladder bars, and the crossbar serves as a support step. When using this single ladder frame structure ladder, since there is no fixed structure, it needs to stand against a support, but it is easy to fall over. Therefore, a herringbone ladder is designed to enhance the safety of the ladder.

[0003] In the related art, at the power construction site, a herringbone ladder is needed to achieve the crossing of wires. The herringbone ladder usually has two straight ladders connected to a rotating shaft at the top, and the two straight ladders can rotate around the rotating shaft to form a herringbone ladder. However, the use of herringbone ladders in the related art to cross the wires will lead to an unstable structure of the herringbone ladder, which will lead to safety hazards. Summary of the invention

[0004] The present invention provides an adjustable stepladder to solve the problem in the related art that the stepladder is used to cross electric wires, which may cause the stepladder to have an unstable structure and thus cause potential safety hazards.

[0005] The present invention provides an adjustable stepladder, which comprises: a base; a driving assembly, comprising a driving member, a first movable seat and a second movable seat, wherein the driving member is arranged on the base, and the first movable seat and the second movable seat are both movably arranged on the base along the length direction of the base, and the driving member is respectively connected to the first movable seat and the second movable seat to drive the first movable seat and the second movable seat to approach or move away from each other; a first main ladder and a second main ladder, wherein the angle between the first main ladder and the second main ladder is adjustable, and the lower end of the first main ladder is arranged on the first movable seat, and the lower end of the second main ladder is arranged on the second movable seat.

[0006] Furthermore, a receiving groove extending along the length direction of the base is provided in the base, and the first movable seat and the second movable seat can be movably provided in the receiving groove. The driving assembly also includes a transmission member, and the transmission member is provided in the receiving groove along the length direction of the base. The transmission member is sequentially passed through the first movable seat and the second movable seat and cooperates with the first movable seat and the second movable seat, and the driving member is drivingly connected to the transmission member to drive the transmission member to transmit.

[0007] Furthermore, the transmission member includes a bidirectional screw having a first threaded segment and a second threaded segment, the first movable seat is penetrated by a first threaded hole, the second movable seat is penetrated by a second threaded hole, the first threaded segment is threadedly matched with the first threaded hole, and the second threaded segment is threadedly matched with the second threaded hole.

[0008] Further, the first movable seat includes a first sliding seat and a first connecting seat, the lower end of the first main ladder is connected to the first connecting seat, the first connecting seat is provided with a first through hole, the first sliding seat is provided with a second through hole, the first connecting seat is arranged on the first sliding seat, and the adjustable herringbone ladder includes a first fastener, the first fastener is passed through the second through hole and the first through hole to connect the first connecting seat with the first sliding seat, and the first sliding seat is slidably matched with the side wall of the accommodating groove; the second movable seat includes a second sliding seat and a second connecting seat, the lower end of the second main ladder is connected to the second connecting seat, the second connecting seat is provided with a third through hole, the second sliding seat is provided with a fourth through hole, the second connecting seat is arranged on the second sliding seat, and the adjustable herringbone ladder includes a second fastener, the second fastener is passed through the fourth through hole and the third through hole to connect the second connecting seat with the second sliding seat, and the second sliding seat is slidably matched with the side wall of the accommodating groove.

[0009] Furthermore, the adjustable herringbone ladder also includes a first auxiliary ladder and a second auxiliary ladder, the upper end of the first auxiliary ladder and the upper end of the second auxiliary ladder are rotatably connected via a connecting structure, the lower end position of the first auxiliary ladder can be telescopically set on the first main ladder, and the lower end position of the second auxiliary ladder can be telescopically set on the second main ladder.

[0010] Furthermore, the connecting structure includes: a rotating shaft; a first connecting plate, the first connecting plate is connected to the first auxiliary ladder correspondingly, and the upper end of the first connecting plate is rotatably set on the rotating shaft; a second connecting plate, the second connecting plate is connected to the second auxiliary ladder correspondingly, the second connecting plate is arranged opposite to the first connecting plate, and the upper end of the second connecting plate is rotatably set on the rotating shaft.

[0011] Furthermore, a first adjusting plate is provided on the side wall of the first connecting plate facing the second connecting plate, the first end of the first adjusting plate is hinged to the first connecting plate, and the first adjusting plate has a plurality of first adjusting holes, a second adjusting plate is provided on the side wall of the second connecting plate facing the first connecting plate, the first end of the second adjusting plate is hinged to the second connecting plate, and the second adjusting plate has a plurality of second adjusting holes, the adjustable herringbone ladder also includes a fixing box, the fixing box has a first opening and a second opening on both sides, the fixing box is provided with a first locking bolt and a second locking bolt, the first adjusting plate extends into the first opening, and the first locking bolt is threadedly connected to one of the first adjusting holes, the second adjusting plate extends into the second opening, and the second locking bolt is threadedly connected to one of the second adjusting holes.

[0012] Furthermore, the adjustable stepladder comprises a plurality of U-shaped fixing hoops for fixing the first auxiliary ladder and the second auxiliary ladder, and the first connecting plate and the second connecting plate are both provided with U-shaped fixing hoops.

[0013] Furthermore, a locking mechanism is arranged between the first auxiliary ladder and the first main ladder, and the locking mechanism includes a locking screw and a U-shaped frame. The lower end of the first auxiliary ladder is passed through the U-shaped frame, and a plurality of third threaded holes are arranged on the first auxiliary ladder. The plurality of third threaded holes are arranged at intervals along the length direction of the first auxiliary ladder. The U-shaped frame is connected to the first main ladder, and the U-shaped frame is provided with connecting circular holes. The locking screws are sequentially passed through the connecting circular holes and are threadedly connected with the third threaded holes to fix the first auxiliary ladder on the first main ladder.

[0014] Furthermore, the adjustable stepladder also includes a fixing plate, which is provided with a plurality of clamping grooves, and the first main ladder and the second main ladder are both provided with a plurality of clamping columns, and the fixing plate extends into the clamping grooves through the clamping columns to fix the first main ladder and the second main ladder.

[0015] Applying the technical solution of the present invention, the adjustable herringbone ladder includes a base, a driving assembly, a first main ladder and a second main ladder, the driving member in the driving assembly is arranged on the base, the first movable seat and the second movable seat can be movably arranged on the base, and the driving member can respectively drive the first movable seat and the second movable seat to approach or move away from each other, the lower end of the first main ladder is arranged on the first movable seat, and the lower end of the second main ladder is arranged on the second movable seat, and the angle between the first main ladder and the second main ladder realizes an angle adjustment function under the action of the first movable seat and the second movable seat. Specifically, the upper end of the first main ladder and the upper end of the second main body are hingedly connected to each other, so that the first main ladder and the second main ladder can be angle-adjusted, and the lower end of the first main ladder is connected to the first movable seat, and the lower end of the second main ladder is connected to the second movable seat. When the driving member drives the first movable seat and the second movable seat to approach or move away from each other, it can be ensured that the first main ladder and the second main ladder can be driven to adjust the angle under the action of the driving member, thereby ensuring the stability of the structure of the adjustable herringbone ladder. If the driving member is not working, the first main ladder and the second main ladder can ensure the stability of the adjustable herringbone ladder under the action of the first movable seat and the second movable seat, thereby avoiding safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of an adjustable herringbone ladder provided according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram showing another viewing angle of an adjustable herringbone ladder provided according to an embodiment of the present invention is shown;

[0019] Figure 3A schematic diagram showing another viewing angle of the adjustable herringbone ladder provided according to an embodiment of the present invention;

[0020] Figure 4 A structural schematic diagram of a connection structure provided according to an embodiment of the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Base; 11. Receiving slot;

[0023] 20. Driving assembly; 21. Driving member; 22. First moving seat; 221. First sliding seat; 222. First connecting seat; 223. First fastening member; 23. Second moving seat; 231. Second sliding seat; 232. Second connecting seat; 233. Second fastening member; 24. Transmission member; 241. Bidirectional screw; 2411. First thread segment; 2412. Second thread segment;

[0024] 31. first main ladder; 32. second main ladder; 33. first auxiliary ladder; 34. second auxiliary ladder; 35. fixing box; 351. first locking bolt; 352. second locking bolt; 36. U-shaped fixing hoop; 37. fixing plate; 371. clamping groove; 38. clamping column;

[0025] 40. Connecting structure; 41. Rotating shaft; 42. First connecting plate; 43. Second connecting plate; 44. First adjusting plate; 45. Second adjusting plate;

[0026] 50. Locking mechanism; 51. Locking screw; 52. U-shaped frame. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 4As shown, an embodiment of the present invention provides an adjustable herringbone ladder, which includes a base 10, a driving assembly 20, a first main ladder 31 and a second main ladder 32. The driving assembly 20 includes a driving member 21, a first movable seat 22 and a second movable seat 23. The driving member 21 is arranged on the base 10, and the first movable seat 22 and the second movable seat 23 are both movably arranged on the base 10 along the length direction of the base 10. The driving member 21 is respectively driven and connected to the first movable seat 22 and the second movable seat 23 to drive the first movable seat 22 and the second movable seat 23 to approach or move away from each other. The angle between the first main ladder 31 and the second main ladder 32 is adjustably set, and the lower end of the first main ladder 31 is arranged on the first movable seat 22, and the lower end of the second main ladder 32 is arranged on the second movable seat 23.

[0029] The adjustable herringbone ladder provided in this embodiment is applied, and the adjustable herringbone ladder includes a base 10, a driving assembly 20, a first main ladder 31 and a second main ladder 32. The driving member 21 in the driving assembly 20 is arranged on the base 10, and the first movable seat 22 and the second movable seat 23 can be movably arranged on the base 10, and the driving member 21 can respectively drive the first movable seat 22 and the second movable seat 23 to approach or move away from each other, and the lower end of the first main ladder 31 is arranged on the first movable seat 22, and the lower end of the second main ladder 32 is arranged on the second movable seat 23. The angle between the first main ladder 31 and the second main ladder 32 realizes an angle adjustment function by the action of the first movable seat 22 and the second movable seat 23. Specifically, the upper end of the first main ladder 31 and the upper end of the second main body are hingedly connected to each other, so that the first main ladder 31 and the second main ladder 32 can be angle-adjusted. The lower end of the first main ladder 31 is connected to the first movable seat 22, and the lower end of the second main ladder 32 is connected to the second movable seat 23. When the driving member 21 drives the first movable seat 22 and the second movable seat 23 to move closer to or away from each other, it can be ensured that the first main ladder 31 and the second main ladder 32 can be driven to adjust the angle under the action of the driving member 21, thereby ensuring the stability of the structure of the adjustable herringbone ladder. If the driving member 21 is not working, the first main ladder 31 and the second main ladder 32 can ensure the stability of the adjustable herringbone ladder under the action of the first movable seat 22 and the second movable seat 23, thereby avoiding safety hazards.

[0030] like Figure 1As shown, the base 10 is provided with a receiving groove 11 extending along the length direction thereof, and the first movable seat 22 and the second movable seat 23 are both movably arranged in the receiving groove 11. The driving assembly 20 also includes a transmission member 24, and the transmission member 24 is arranged in the receiving groove 11 along the length direction of the base 10. The transmission member 24 is sequentially penetrated through the first movable seat 22 and the second movable seat 23 and cooperates with the first movable seat 22 and the second movable seat 23. The driving member 21 is drivingly connected to the transmission member 24 to drive the transmission member 24 to transmit. By adopting the above structure, by providing a receiving groove 11 on the base 10, the first movable seat 22 and the second movable seat 23 can be movably arranged along the length direction of the receiving groove 11, and by sequentially inserting the transmission member 24 into the first movable seat 22 and the second movable seat 23, the driving member 21 and the transmission member 24 are driven to cooperate, so that the transmission member 24 can be driven to rotate, and the transmission member 24 can cooperate with the first movable seat 22 and the second movable seat 23, so that the first movable seat 22 and the second movable seat 23 can be driven to move closer to or away from each other, thereby facilitating the adjustment of the angle between the first main ladder 31 and the second main ladder 32.

[0031] like Figure 1 As shown, the transmission member 24 includes a bidirectional screw 241, the bidirectional screw 241 has a first threaded section 2411 and a second threaded section 2412, the first movable seat 22 is provided with a first threaded hole, the second movable seat 23 is provided with a second threaded hole, the first threaded section 2411 is threadedly matched with the first threaded hole, and the second threaded section 2412 is threadedly matched with the second threaded hole. With the above structure, the first threaded section 2411 of the bidirectional screw 241 is inserted into the first threaded hole of the first movable seat 22, so that the first threaded section 2411 can be threadedly matched with the first threaded hole, and the second threaded section 2412 of the bidirectional screw 241 is threadedly matched with the second threaded hole of the second movable seat 23, so that the first movable seat 22 and the second movable seat 23 can be driven to move and thus achieve mutual approach or mutual distance.

[0032] like Figure 1 and Figure 2As shown, the first movable seat 22 includes a first sliding seat 221 and a first connecting seat 222, the lower end of the first main ladder 31 is connected to the first connecting seat 222, the first connecting seat 222 is provided with a first through hole, the first sliding seat 221 is provided with a second through hole, the first connecting seat 222 is provided on the first sliding seat 221, and the adjustable herringbone ladder includes a first fastener 223, the first fastener 223 is passed through the second through hole and the first through hole to connect the first connecting seat 222 with the first sliding seat 221, and the first sliding seat 221 is slidably matched with the side wall of the accommodating groove 11. With the above structure, a first through hole is provided on the first connecting seat 222, a second through hole is provided on the first sliding seat 221, and the first sliding seat 221 can be slidably arranged in the accommodating groove 11, the first connecting seat 222 is connected to the lower end of the first main ladder 31 and the first connecting seat 222 is arranged on the first sliding seat 221, and the first fastener 223 is sequentially penetrated through the second through hole and the first through hole, so that the first connecting seat 222 and the first sliding seat 221 are conveniently connected, which is convenient for assembly and the first movable seat 22 can slide in the accommodating groove 11.

[0033] like Figure 1 and Figure 2 As shown, the second movable seat 23 includes a second sliding seat 231 and a second connecting seat 232, the lower end of the second main ladder 32 is connected to the second connecting seat 232, a third through hole is provided on the second connecting seat 232, a fourth through hole is provided on the second sliding seat 231, the second connecting seat 232 is provided on the second sliding seat 231, and the adjustable herringbone ladder includes a second fastener 233, the second fastener 233 is passed through the fourth through hole and the third through hole to connect the second connecting seat 232 with the second sliding seat 231, and the second sliding seat 231 is slidably matched with the side wall of the accommodating groove 11. With the above structure, a third through hole is provided on the second connecting seat 232, a fourth through hole is provided on the second sliding seat 231, and the second sliding seat 231 can be slidably arranged in the accommodating groove 11, the second connecting seat 232 is connected to the lower end of the second main ladder 32 and the second connecting seat 232 is arranged on the second sliding seat 231, and the second fastener 233 is sequentially penetrated through the fourth through hole and the third through hole, so that the second connecting seat 232 and the second sliding seat 231 are conveniently connected, which is convenient for assembly and the second movable seat 23 can slide in the accommodating groove 11.

[0034] like Figures 1 to 4As shown, the adjustable herringbone ladder further includes a first auxiliary ladder 33 and a second auxiliary ladder 34, the upper end of the first auxiliary ladder 33 and the upper end of the second auxiliary ladder 34 are rotatably connected via a connecting structure 40, the lower end of the first auxiliary ladder 33 is telescopically arranged on the first main ladder 31, and the lower end of the second auxiliary ladder 34 is telescopically arranged on the second main ladder 32. With the above structure, by setting the lower end of the first auxiliary ladder 33 to be telescopically arranged on the first main ladder 31, the lower end of the second auxiliary ladder 34 is telescopically arranged on the second main ladder 32, and the first auxiliary ladder 33 and the second auxiliary ladder 34 are rotatably connected via the connecting structure 40, it is convenient to drive the first auxiliary ladder 33 and the second auxiliary ladder 34 to adjust the angle, and the length of the adjustable herringbone ladder can be adjusted according to the first auxiliary ladder 33 and the second auxiliary ladder 34, thereby improving the structural reliability and practicality of the adjustable herringbone ladder.

[0035] like Figure 2 and Figure 4 As shown, the connection structure 40 includes a rotating shaft 41, a first connecting plate 42 and a second connecting plate 43. The first connecting plate 42 is connected to the first auxiliary ladder 33, and the upper end of the first connecting plate 42 is rotatably arranged on the rotating shaft 41. The second connecting plate 43 is connected to the second auxiliary ladder 34, and the second connecting plate 43 is arranged opposite to the first connecting plate 42. The upper end of the second connecting plate 43 is rotatably arranged on the rotating shaft 41. With the above structure, the first connecting plate 42 is connected to the first auxiliary ladder 33, and the upper end of the first connecting plate 42 is rotatably arranged on the rotating shaft 41. The second connecting plate 43 is connected to the second auxiliary ladder 34, and the second connecting plate 43 is arranged opposite to the first connecting plate 42. The upper end of the second connecting plate 43 is rotatably arranged on the rotating shaft 41. The first auxiliary ladder 33 and the second auxiliary ladder 34 are rotatably arranged through the rotating shaft 41, so as to facilitate rotation.

[0036] like Figure 2 and Figure 4As shown, a first adjusting plate 44 is provided on the side wall of the first connecting plate 42 facing the second connecting plate 43, a first end of the first adjusting plate 44 is hinged to the first connecting plate 42, and the first adjusting plate 44 has a plurality of first adjusting holes, a second adjusting plate 45 is provided on the side wall of the second connecting plate 43 facing the first connecting plate 42, a first end of the second adjusting plate 45 is hinged to the second connecting plate 43, and the second adjusting plate 45 has a plurality of second adjusting holes, the adjustable stepladder also includes a fixing box 35, the fixing box 35 has a first opening and a second opening on both sides, a first locking bolt 351 and a second locking bolt 352 are provided on the fixing box 35, the first adjusting plate 44 extends into the first opening, and the first locking bolt 351 is threadedly connected to one of the first adjusting holes, the second adjusting plate 45 extends into the second opening, and the second locking bolt 352 is threadedly connected to one of the second adjusting holes. By adopting the above structure, a first adjustment plate 44 is provided on the side wall of the first connecting plate 42 facing the second connecting plate 43, the first end of the first adjustment plate 44 is hinged to the first connecting plate 42, the first adjustment plate 44 has a plurality of first adjustment holes, a second adjustment plate 45 is provided on the side wall of the second connecting plate 43 facing the first connecting plate 42, the first end of the second adjustment plate 45 is hinged to the second connecting plate 43, the second adjustment plate 45 has a plurality of second adjustment holes, the first adjustment plate 44 is telescopically arranged at the first opening of the fixing box 35, the second adjustment plate 45 is telescopically arranged at the second opening of the fixing box 35, and the first locking bolt 351 is passed through the first adjustment hole to connect and fix the first adjustment plate 44 to the fixing box 35, and the second locking bolt 352 is passed through the second adjustment hole to connect and fix the second adjustment plate 45 to the fixing box 35.

[0037] It should be noted that, in the present invention, there are multiple fixing boxes 35, and the lengths of the multiple fixing boxes 35 are different. After adjusting the unfolding angles of the first connecting plate 42 and the second connecting plate 43, an adaptive fixing box 35 can be selected to be connected and fixed to the first adjustment plate 44 and the second adjustment plate 45, so that the first adjustment plate 44, the second adjustment plate 45 and the fixing box 35 form a reinforcing support for the first connecting plate 42 and the second connecting plate 43.

[0038] like Figure 2 and Figure 4 As shown, the adjustable stepladder includes a plurality of U-shaped fixing hoops 36 for fixing the first auxiliary ladder 33 and the second auxiliary ladder 34, and the first connecting plate 42 and the second connecting plate 43 are both provided with U-shaped fixing hoops 36. With the above structure, by providing U-shaped fixing hoops 36 on the first connecting plate 42 and the second connecting plate 43, it is convenient to connect and fix the first auxiliary ladder 33 with the first main ladder 31, and the second auxiliary ladder 34 with the second main ladder 32.

[0039] like Figure 1 and Figure 2 As shown, a locking mechanism 50 is provided between the first auxiliary ladder 33 and the first main ladder 31, and the locking mechanism 50 includes a locking screw 51 and a U-shaped frame 52. The lower end of the first auxiliary ladder 33 is penetrated through the U-shaped frame 52. A plurality of third threaded holes are provided on the first auxiliary ladder 33, and the plurality of third threaded holes are arranged at intervals along the length direction of the first auxiliary ladder 33. The U-shaped frame 52 is connected to the first main ladder 31, and the U-shaped frame 52 is provided with a connecting circular hole. The locking screw 51 is sequentially penetrated through the connecting circular hole and is threadedly connected with the third threaded hole to fix the first auxiliary ladder 33 on the first main ladder 31. With the above structure, by providing the locking mechanism 50, the locking screw 51 is sequentially penetrated through the U-shaped frame 52 and the third threaded hole on the first auxiliary ladder 33, so that the locking screw 51 can be sequentially penetrated through the connecting circular hole and is threadedly connected with the third threaded hole to fix the first auxiliary ladder 33 on the first main ladder 31.

[0040] like Figure 1 and Figure 2 As shown, the adjustable stepladder further comprises a fixing plate 37, on which a plurality of clamping grooves 371 are arranged, and a plurality of clamping posts 38 are arranged on the first main ladder 31 and the second main ladder 32, and the fixing plate 37 extends into the clamping grooves 371 through the clamping posts 38 to fix the first main ladder 31 and the second main ladder 32. With the above structure, by providing the fixing plate 37, a plurality of clamping grooves 371 are arranged on the fixing plate 37, and a plurality of clamping posts 38 are arranged on the first main ladder 31 and the second main ladder 32, and the clamping grooves 371 can selectively extend into the clamping posts 38, so that the first main ladder 31 and the second main ladder 32 can be fixed.

[0041] It should be noted that a slide groove is provided on the first main ladder 31 , and a slide bar is provided on the first auxiliary ladder 33 , and the slide bar is slidably provided in the slide groove.

[0042] Wherein, a storage drawer is arranged on the base 10, and a handle is arranged on the surface of the storage drawer. When used on the land, a ground-inserting bolt can be arranged to insert into the ground to strengthen the overall stability of the first main ladder 31 and the second main ladder 32.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable herringbone ladder, characterized in that: The adjustable herringbone ladder comprises: Base (10); A driving assembly (20), comprising a driving member (21), a first moving seat (22) and a second moving seat (23), wherein the driving member (21) is arranged on the base (10), the first moving seat (22) and the second moving seat (23) are both movably arranged on the base (10) along the length direction of the base (10), and the driving member (21) is respectively drivingly connected to the first moving seat (22) and the second moving seat (23) to drive the first moving seat (22) and the second moving seat (23) to move closer to each other or farther away from each other; A first main ladder (31) and a second main ladder (32), wherein the angle between the first main ladder (31) and the second main ladder (32) is adjustable, the lower end of the first main ladder (31) is arranged on the first movable seat (22), and the lower end of the second main ladder (32) is arranged on the second movable seat (23).

2. The adjustable stepladder according to claim 1, characterized in that: The base (10) is provided with a receiving groove (11) extending along the length direction thereof, and the first movable seat (22) and the second movable seat (23) are both movably arranged in the receiving groove (11). The driving assembly (20) further comprises a transmission member (24), and the transmission member (24) is arranged in the receiving groove (11) along the length direction of the base (10). The transmission member (24) is sequentially passed through the first movable seat (22) and the second movable seat (23) and matched with the first movable seat (22) and the second movable seat (23). The driving member (21) is drivingly connected to the transmission member (24) so ​​as to drive the transmission member (24) to transmit.

3. The adjustable stepladder according to claim 2, characterized in that: The transmission member (24) includes a bidirectional screw (241), and the bidirectional screw (241) has a first threaded section (2411) and a second threaded section (2412). The first movable seat (22) is provided with a first threaded hole, and the second movable seat (23) is provided with a second threaded hole. The first threaded section (2411) is threadedly matched with the first threaded hole, and the second threaded section (2412) is threadedly matched with the second threaded hole.

4. The adjustable stepladder according to claim 2, characterized in that: The first movable seat (22) comprises a first sliding seat (221) and a first connecting seat (222); the lower end of the first main ladder (31) is connected to the first connecting seat (222); the first connecting seat (222) is provided with a first through hole; the first sliding seat (221) is provided with a second through hole; the first connecting seat (222) is provided on the first sliding seat (221); the adjustable herringbone ladder comprises a first fastener (223); the first fastener (223) is passed through the second through hole and the first through hole to connect the first connecting seat (222) with the first sliding seat (221); the first sliding seat (221) is slidably matched with the side wall of the accommodating groove (11); The second movable seat (23) comprises a second sliding seat (231) and a second connecting seat (232); the lower end of the second main ladder (32) is connected to the second connecting seat (232); a third through hole is provided on the second connecting seat (232); a fourth through hole is provided on the second sliding seat (231); the second connecting seat (232) is arranged on the second sliding seat (231); the adjustable stepladder comprises a second fastener (233); the second fastener (233) is passed through the fourth through hole and the third through hole to connect the second connecting seat (232) with the second sliding seat (231); the second sliding seat (231) is slidably matched with the side wall of the accommodating groove (11).

5. The adjustable stepladder according to any one of claims 1 to 4, characterized in that: The adjustable herringbone ladder further comprises a first auxiliary ladder (33) and a second auxiliary ladder (34); the upper end of the first auxiliary ladder (33) and the upper end of the second auxiliary ladder (34) are rotatably connected via a connecting structure (40); the lower end of the first auxiliary ladder (33) can be telescopically arranged on the first main ladder (31); and the lower end of the second auxiliary ladder (34) can be telescopically arranged on the second main ladder (32).

6. The adjustable stepladder according to claim 5, characterized in that: The connection structure (40) comprises: A rotating shaft (41); A first connecting plate (42), the first connecting plate (42) being correspondingly connected to the first auxiliary ladder (33), and the upper end of the first connecting plate (42) being rotatably disposed on the rotating shaft (41); A second connecting plate (43), the second connecting plate (43) is correspondingly connected to the second auxiliary ladder (34), the second connecting plate (43) is arranged opposite to the first connecting plate (42), and the upper end of the second connecting plate (43) is rotatably arranged on the rotating shaft (41).

7. The adjustable stepladder according to claim 6, characterized in that: A first adjustment plate (44) is provided on a side wall of the first connecting plate (42) facing the second connecting plate (43), a first end of the first adjustment plate (44) is hinged to the first connecting plate (42), and the first adjustment plate (44) has a plurality of first adjustment holes, and a second adjustment plate (45) is provided on a side wall of the second connecting plate (43) facing the first connecting plate (42), a first end of the second adjustment plate (45) is hinged to the second connecting plate (43), and the second adjustment plate (45) has a plurality of first adjustment holes. The adjustable stepladder further comprises a fixing box (35), the fixing box (35) having a first opening and a second opening on both sides, the fixing box (35) being provided with a first locking bolt (351) and a second locking bolt (352), the first adjusting plate (44) extending into the first opening, and the first locking bolt (351) being threadedly connected to one of the first adjusting holes, the second adjusting plate (45) extending into the second opening, and the second locking bolt (352) being threadedly connected to one of the second adjusting holes.

8. The adjustable stepladder according to claim 6, characterized in that: The adjustable stepladder comprises a plurality of U-shaped fixing hoops (36) for fixing the first auxiliary ladder (33) and the second auxiliary ladder (34), and the first connecting plate (42) and the second connecting plate (43) are both provided with the U-shaped fixing hoops (36).

9. The adjustable stepladder according to claim 5, characterized in that: A locking mechanism (50) is provided between the first auxiliary ladder (33) and the first main ladder (31), the locking mechanism (50) comprising a locking screw (51) and a U-shaped frame (52), the lower end of the first auxiliary ladder (33) is penetrated through the U-shaped frame (52), a plurality of third threaded holes are provided on the first auxiliary ladder (33), the plurality of third threaded holes are spaced apart along the length direction of the first auxiliary ladder (33), the U-shaped frame (52) is connected to the first main ladder (31), the U-shaped frame (52) is provided with a connecting circular hole, the locking screw (51) is sequentially penetrated through the connecting circular hole and is threadedly connected with the third threaded hole, so as to fix the first auxiliary ladder (33) on the first main ladder (31).

10. The adjustable stepladder according to any one of claims 1 to 4, characterized in that: The adjustable stepladder further comprises a fixing plate (37), a plurality of clamping grooves (371) are arranged on the fixing plate (37), a plurality of clamping columns (38) are arranged on the first main ladder (31) and the second main ladder (32), and the fixing plate (37) extends into the clamping grooves (371) through the clamping columns (38) to fix the first main ladder (31) and the second main ladder (32).

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