Adjustable ladder level track aluminium profile unit

Abstract

The utility model discloses an adjustable ladder horizontal height track aluminum profile unit, and the ladder includes one or more main ladders, and the main ladder includes two symmetrical and apart setting support legs, and one track aluminum profile unit is arranged on the surface of the opposite side of the two support legs respectively, and the track aluminum profile unit includes first section bar and positioning structure, and from the cross section angle observation, the first section bar includes sliding cover first vertical board, sliding cover first horizontal board and sliding cover second vertical board, compared with the adjustable foot or the method of laying pad block in the prior art, the cooperation mode of rotating wheel spare and clamping piece is adopted in the application, and because the existence of the plurality of linear array arrangement tooth parts, can make the length accurate to the interval between the adjacent tooth parts, this makes the whole process, the regulation accuracy of the length of extension is high, and the operation is also very convenient, just pulls the recessed groove shape structure, can realize the regulation of the length of extension.

Description

Technical Field

[0001] This utility model relates to the field of ladder technology, specifically to an adjustable ladder horizontal height track aluminum profile unit. Background Technology

[0002] Aluminum alloy ladders, as an important tool for modern high-altitude operations, have become indispensable equipment in various scenarios such as construction, industrial maintenance, and daily household use due to their excellent properties such as lightweight, high strength, corrosion resistance, and portability. Their main body is typically made of high-strength aluminum alloy profiles, and advanced processes such as square tube extrusion and riveting are widely used to ensure structural stability.

[0003] Currently available aluminum alloy ladders have relatively mature structural designs. For example, some ladders feature double-layered rubber-wrapped anti-slip designs on the feet, and are equipped with adjustable joints and widened and thickened connectors to enhance overall stability. For more complex working environments, such as large scaffolding systems, adjustable outriggers or bases are commonly introduced, designed to adapt to slightly uneven ground through manual adjustment.

[0004] However, when ladders are used in actual production sites, they face complex conditions such as uneven ground, slopes, or soft ground, and the existing technical solutions are still insufficient.

[0005] Currently, most ladders rely on adjustable feet or padding blocks for height adjustment. However, the padding block method depends on the operator's experience and subjective judgment, which can easily lead to the padding blocks being too low or too high. When adjusting the height of different ladder legs, most adjustable feet have limited adjustment range and the adjustment accuracy is often uncontrollable. This can easily lead to a situation where one ladder leg is properly supported while the other still has a height difference, resulting in unstable ladder support and affecting safety.

[0006] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0007] The purpose of this invention is to provide an adjustable ladder leveling track aluminum profile unit.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An adjustable ladder horizontal height track aluminum profile unit, the ladder includes one or more main ladders, the main ladder includes two symmetrical and spaced support legs, and a track aluminum profile unit is respectively provided on the opposite side surface of the two support legs, the track aluminum profile unit includes a first profile and a positioning structure; Viewed from a cross-sectional perspective, the first profile includes a first vertical sliding cover, a first horizontal sliding cover, and a second vertical sliding cover. The first vertical sliding cover, the first horizontal sliding cover, and the second vertical sliding cover are connected and combined in sequence to form a groove-shaped structure with an opening. The opening of the groove-shaped structure faces the support leg and is slidably disposed relative to the support leg to form an extended state and a retracted state. The sliding direction of the groove-shaped structure is parallel to the length direction of the support leg. The positioning structure acts on the groove-shaped structure and the support leg. The positioning structure includes a rotating wheel and a locking component. One of the rotating wheel and the locking component is disposed on the groove-shaped structure, and the other is positioned and connected to the support leg. The locking component has a plurality of teeth arranged in a linear array and meshing with the toothed blocks on the rotating wheel. The rotating wheel has a unidirectional rotation state. In the extended state, the first profile slides out relative to the supporting leg with a groove-shaped structure, and the rotating wheel is in a unidirectional rotation state. The extension locking of the groove-shaped structure is achieved by the cooperation of any tooth with the rotating wheel. In order to enter the retracted state, the unidirectional engagement restriction of the teeth on the rotating wheel is released, and the groove-shaped structure slides back relative to the support leg.

[0009] In the above solution, the operator can quickly adjust the extension length of the grooved structure through the cooperation of the grooved structure, rotating wheels, and locking components. Furthermore, the appropriate length of the grooved structure can be extended for each support leg to adapt to different ground surfaces. A footboard is provided between the two support legs.

[0010] Specifically, since the rotating wheel is in a unidirectional rotation state, it directly pulls the grooved structure, causing it to slide out relative to the supporting leg. When it slides to the required length, the extension and locking of the grooved structure can be achieved by the engagement of any tooth with the rotating wheel. Afterwards, once the grooved structure needs to be retracted, simply release the unidirectional engagement restriction of the tooth on the rotating wheel, and the grooved structure can be pushed to slide back.

[0011] In the above solution, compared with the adjustable feet or padding blocks in the prior art, this application adopts a combination of rotating wheels and locking parts. Due to the presence of multiple teeth arranged in a linear array, the length can be accurate to the distance between adjacent teeth. This makes the adjustment accuracy of the extension length high throughout the process, and the operation is also very convenient. The extension length can be adjusted simply by pulling the grooved structure. At the same time, grooved structures are provided on both support legs of the main ladder, which allows the main ladder to adjust the extension length of the grooved structure as needed (the extension of the grooved structure means that the bottom of the main ladder is extended, and the height of the main ladder is increased).

[0012] In a further technical solution, the locking component includes a long strip vertical plate, which is disposed within a groove-shaped structure and positioned and connected to the groove-shaped structure. The long strip vertical plate is parallel to and spaced apart from the second vertical plate of the sliding cover. The teeth are disposed on the elongated vertical plate, and the teeth include toothed holes formed recessed in the surface of the elongated vertical plate; The rotating wheel also has a bidirectional rotation state. In the retracted state, the rotating wheel enters the bidirectional rotation state to release the unidirectional meshing restriction of the teeth on the rotating wheel.

[0013] The above design allows for a higher precision fit between the rotating wheel and the locking mechanism.

[0014] Fins can also be installed on the teeth, but the thickness of the fins affects the installation space.

[0015] In a further technical solution, the track aluminum profile unit also includes a second profile fixedly positioned on the support leg, and the first profile is slidably positioned on the second profile; Viewed from a cross-sectional perspective, the second profile includes a second horizontal plate, and a sliding bracket is provided at each end of the second horizontal plate, with the two sliding brackets arranged symmetrically. The slide frame includes a first vertical slide plate, a first horizontal slide plate, and a second vertical slide plate; The side of the first vertical plate of the slide block is integrally connected to the end of the second horizontal plate. The first vertical plate of the slide block, the first horizontal plate of the slide block, and the second vertical plate of the slide block are sequentially connected and combined to form a U-shaped structure. The length of the first vertical plate of the slide is greater than the length of the second vertical plate of the slide.

[0016] The above design facilitates the positioning of the grooved structure during assembly. If the grooved structure were directly slidable with the support leg, the rotating wheel would need to be directly fixed to the support leg, requiring the removal of all components for subsequent maintenance. However, with the second profile, the operator can remove the entire track aluminum profile unit simply by disassembling the second profile.

[0017] A further technical solution is that the end of the first vertical plate of the slide block away from the first horizontal plate of the slide block has a slide block bending plate, which is formed by bending the end of the first vertical plate of the slide block towards the end away from the second horizontal plate at a set angle (the set angle is a right angle). The ends of the first vertical plate and the second vertical plate of the sliding cover are integrally connected with a third horizontal plate. The extension line of the third horizontal plate in the length direction is perpendicular to the extension line of the first vertical plate or the second vertical plate of the sliding cover in the length direction. The extension line of the third horizontal plate in the length direction is perpendicular to the extension line of the first vertical plate of the slide block in the length direction. The third horizontal plate is provided with an abutting bending plate at one end near the first vertical plate of the slide block. The abutting bending plate is formed by bending the third horizontal plate toward the slide block bending plate at a set angle (the set angle is a right angle). Through the cooperation of the abutting bending plate and the slide block bending plate, the groove-shaped structure is slidably positioned relative to the support leg.

[0018] The above design can improve the stability of the groove-shaped structure and the U-shaped structure during sliding.

[0019] A further technical solution is that the surface of the third horizontal plate facing the slide frame is recessed to form a guide groove; The guide groove is provided corresponding to the second vertical plate of the slide block, and the end of the second vertical plate of the slide block is embedded in the guide groove.

[0020] The above design can further ensure the stability of the groove-shaped structure and the U-shaped structure during relative movement.

[0021] A further technical solution is that a groove block with a first groove is provided on one end surface of the first horizontal plate of the sliding cover near the first vertical plate of the sliding cover. The groove block is disposed in the groove-shaped structure, and the opening of the first groove faces the slide frame. A limiting block is provided on the third horizontal plate at the end of the first vertical plate of the sliding cover. The limiting block is set in a groove-shaped structure and is parallel to and spaced apart from the abutting bending plate. The limiting block and the abutting bending plate are combined to form a second groove. The openings of the first groove and the second groove are arranged opposite to each other and combined to form a restricted area; The locking element is configured to be positioned within a restricted area.

[0022] The above design enables rapid positioning and installation of the locking components.

[0023] A further technical solution is that when two main ladders are set, the two main ladders are set opposite each other, and the upper ends of the opposite support legs of the two main ladders are hinged together to form a A-frame ladder structure.

[0024] The above design allows the aluminum profile rail unit to be adapted to different ladders.

[0025] In a further technical solution, the rotating wheel includes a gear, and a rotating shaft positioned on the third horizontal plate is provided on the axis of the gear. The axis of the rotating shaft is perpendicular to the extension line of the length direction of the third horizontal plate, and the rotating shaft passes through the support leg.

[0026] With the above design, the rotating shaft can act as a constraint on the gear, making the gear more stable when rotating around the axis of the rotating shaft.

[0027] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0028] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0029] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0030] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0031] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0032] The working principle and advantages of this utility model are as follows: In this invention, the operator can quickly adjust the extension length of the grooved structure through the cooperation of the grooved structure, rotating wheel and locking component, and can extend the grooved structure to a suitable length for each support leg to adapt to different ground surfaces.

[0033] Specifically, since the rotating wheel is in a unidirectional rotation state, it directly pulls the grooved structure, causing it to slide out relative to the supporting leg. When it slides to the required length, the extension and locking of the grooved structure can be achieved by the engagement of any tooth with the rotating wheel. Afterwards, once the grooved structure needs to be retracted, simply release the unidirectional engagement restriction of the tooth on the rotating wheel, and the grooved structure can be pushed to slide back.

[0034] Compared to the adjustable feet or padding blocks in the prior art, this application uses a combination of rotating wheels and locking components. Due to the presence of multiple teeth arranged in a linear array, the length can be precisely adjusted down to the distance between adjacent teeth. This results in high precision in adjusting the extension length throughout the process, and the operation is also very convenient. The extension length can be adjusted simply by pulling the grooved structure. In addition, grooved structures are provided on both support legs of the main ladder, allowing the extension length of the grooved structure to be adjusted as needed. Attached Figure Description

[0035] Appendix Figure 1 This is a perspective view of the ladder in an embodiment of the present utility model; Appendix Figure 2 This is a front view structural diagram of the ladder in this embodiment of the present invention when the track aluminum profile unit is installed; Appendix Figure 3 A side view of the ladder in this embodiment of the present invention when the track aluminum profile unit is installed; Appendix Figure 4 This is a perspective view of the first profile in an embodiment of this utility model; Appendix Figure 5 This is a schematic diagram of the connection between the first profile, the second profile, and the positioning structure in an embodiment of this utility model; Appendix Figure 6 This is a schematic diagram of the structure when the first profile and the second profile are connected in an embodiment of this utility model; Appendix Figure 7 This is a schematic diagram of the longitudinal section of a gear for switching between unidirectional and bidirectional rotation in an embodiment of the present invention. Appendix Figure 8 This is a schematic diagram of the main view structure of a gear for switching between unidirectional and bidirectional rotation provided for a rotating wheel component in an embodiment of this utility model; Appendix Figure 9 This is a schematic diagram of the structure of the half vertical plate in an embodiment of the present invention (an implementation method provided to relieve the one-way meshing restriction of the teeth on the rotating wheel).

[0036] In the attached diagrams above: 1. Ladder fixture; 11. Main ladder; 111. Support leg; 2. First profile; 21. First vertical plate of the sliding cover; 22. First horizontal plate of the sliding cover; 23. Second vertical plate of the sliding cover; 211. Third horizontal plate; 212. Abutting bending plate; 213. Restricting block; 2111, guide groove; 221, groove block; 3. Positioning structure; 31. Rotating wheel component; 32. Locking component; 311. Gear; 312. Rotating shaft; 321. Long, narrow vertical plate; 322. Toothed section; 3221. Toothed hole; 3211. Half of the vertical plate; 4. Second profile; 41. Second cross plate; 42. Slide bracket; 421. First vertical plate of the slide; 422. First horizontal plate of the slide; 423. Second vertical plate of the slide; 424. Bent plate of the slide. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0038] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0039] See appendix Figure 1 - Figure 9 As shown, an adjustable ladder 1 horizontal height track aluminum profile unit is provided. The ladder 1 includes one or more main ladders 11. The main ladder 11 includes two symmetrical and spaced support legs 111. On the opposite side surface of the two support legs 111, a track aluminum profile unit is provided one to one. The track aluminum profile unit includes a first profile 2 and a positioning structure 3. Viewed from a cross-sectional perspective, the first profile 2 includes a sliding cover first vertical plate 21, a sliding cover first horizontal plate 22, and a sliding cover second vertical plate 23. The sliding cover first vertical plate 21, the sliding cover first horizontal plate 22, and the sliding cover second vertical plate 23 are connected and combined in sequence to form a groove-shaped structure with an opening. The opening of the groove-shaped structure is directly opposite the support leg 111 and is slidably disposed relative to the support leg 111 to form an extended state and a retracted state. The sliding direction of the groove-shaped structure is parallel to the length direction of the support leg 111. The positioning structure 3 acts on the groove-shaped structure and the support leg 111. The positioning structure 3 includes a rotating wheel 31 and a locking member 32. One of the rotating wheel 31 and the locking member 32 is disposed on the groove-shaped structure, and the other is positioned and connected to the support leg 111. The locking member 32 is provided with a plurality of teeth 322 arranged in a linear array and meshing with the toothed blocks on the rotating wheel 31. The rotating wheel 31 has a unidirectional rotation state. In the extended state, the first profile 2 slides out relative to the support leg 111 with a groove-shaped structure, and the rotating wheel 31 is in a unidirectional rotation state. The extension locking of the groove-shaped structure is achieved by the cooperation of any tooth 322 with the rotating wheel 31. In order to enter the retracted state, the one-way engagement restriction of the toothed part 322 on the rotating wheel 31 is released, and the grooved structure slides back relative to the support leg 111.

[0040] In this embodiment, one or more main ladders 11 can be set. When one is set, the ladder 1 is a straight ladder; when two are set, the ladder 1 is an A-frame ladder; when multiple are set, multiple main ladders 11 are arranged vertically and in a straight line, and then adjacent main ladders 11 are connected by connecting rods. The specific structure can be referred to the stainless steel electric telescopic gate in the prior art.

[0041] In this embodiment, the track aluminum profile unit can be installed on one or more main ladders 11. This application illustrates the example of installation on a single main ladder 11.

[0042] In this embodiment, the rotating wheel 31 and the locking member 32 are respectively disposed on the groove-shaped structure and positioned connected to the support leg 111. To extend the service life of the rotating wheel 31, the preferred arrangement is that the locking member 32 is disposed on the groove-shaped structure, and the rotating wheel 31 is positioned connected to the support leg 111. Figure 4 and Figure 5 .

[0043] In this embodiment, the opening of the groove-shaped structure faces the support leg 111 and is slidably disposed relative to the support leg 111. The groove-shaped structure can be directly sleeved on the outer periphery of the support leg 111 to achieve sliding placement; alternatively, a guide rail can be provided on the outer periphery of the support leg 111 to allow the groove-shaped structure to slide relative to the support leg 111.

[0044] In this invention, the operator can quickly adjust the extension length of the grooved structure through the cooperation of the grooved structure, the rotating wheel 31 and the locking part 32, and can extend the grooved structure of appropriate length for each support leg 111 according to the needs, so as to adapt to different ground surfaces.

[0045] Specifically, since the rotating wheel 31 is in a unidirectional rotation state, it directly pulls the grooved structure, causing it to slide out relative to the support leg 111. When it slides to the required length, the extension and locking of the grooved structure can be achieved by the engagement of any tooth 322 with the rotating wheel 31. Afterwards, once the grooved structure needs to be retracted, it is only necessary to release the unidirectional engagement restriction of the tooth 322 on the rotating wheel 31 to push the grooved structure to slide back.

[0046] In the above solution, compared with the adjustable feet or padding blocks in the prior art, this application adopts the cooperation of rotating wheel 31 and locking part 32. Since there are multiple teeth 322 arranged in a linear array, the length can be accurate to the distance between adjacent teeth. This makes the adjustment accuracy of the extension length high throughout the process, and the operation is also very convenient. The extension length can be adjusted by simply pulling the groove structure. At the same time, the two support legs 111 of the main ladder 11 are provided with groove structures, which allows the main ladder 11 to adjust the extension length of the groove structure as needed (the extension of the groove structure means that the bottom of the main ladder 11 is extended, and the height of the main ladder 11 is increased).

[0047] Preferably, the locking component 32 includes an elongated vertical plate 321, which is disposed within the grooved structure and positioned and connected to the grooved structure. The elongated vertical plate 321 is parallel to and spaced apart from the second vertical plate 23 of the sliding cover. The toothed portion 322 is disposed on the elongated vertical plate 321, and the toothed portion 322 includes a toothed hole 3221 formed recessed in the surface of the elongated vertical plate 321; The rotating wheel 31 also has a bidirectional rotation state. In the retracted state, the rotating wheel 31 enters the bidirectional rotation state to release the unidirectional meshing restriction of the teeth 322 on the rotating wheel 31.

[0048] In this embodiment, the one-way meshing restriction of the toothed part 322 on the rotating wheel 31 is released in the following ways: In the first method, the rotating wheel 31 also has a bidirectional rotation state. In the retracted state, the rotating wheel 31 enters the bidirectional rotation state to release the unidirectional engagement restriction of the teeth 322 on the rotating wheel 31. That is, when the groove-shaped structure is in the extended state, the rotating wheel 31 can only rotate in one direction (e.g., as...). Figure 4 As shown, when rotating in one direction, it can only rotate counterclockwise. The principle of unidirectional rotation can be referred to as the working principle of ratchet and ratchet wheel. Once the groove-shaped structure is in the retracted state, the rotating wheel 31 can rotate freely in both directions. At this time, it can rotate not only counterclockwise but also clockwise.

[0049] Specifically, the operation of the rotating wheel 31 to switch between unidirectional and bidirectional rotation is as follows, which can be referred to... Figure 7 and Figure 8A movable locking pin is provided through the axis of the rotating wheel 31. A cross key is provided at the end of the movable locking pin, and a cross key groove is provided on the end face of the rotating wheel 31. When the cross key is engaged in the cross key groove, the rotating wheel 31 is in a unidirectional rotation state. Once the cross key is axially disengaged from the cross key groove, the rotating wheel 31 is in a bidirectional rotation state (the principle is as follows: since the cross key is engaged in the cross key groove, and the movable locking pin and the rotating wheel 31 can only move axially back and forth, and the movable locking pin is provided with a ratchet and ratchet engagement structure, the movable locking pin can achieve unidirectional rotation together with the rotating wheel 31. Once bidirectional rotation is required, the movable locking pin is pushed to slide, so that the movable locking pin disengages from the ratchet and ratchet engagement structure. At the same time, the cross key is axially disengaged from the cross key groove, so that the rotating wheel 31 is in a bidirectional rotation state. Afterwards, once the movable locking pin is no longer pushed, the movable locking pin will automatically reset under the action of the elastic element, and achieve unidirectional rotation again).

[0050] The ratchet and ratchet engagement structure can be configured as follows: the ratchet is located at the end of the movable locking pin away from the cross key, the ratchet is positioned and connected to the support leg and is located next to the ratchet, and engages with the ratchet. When the movable locking pin is not pushed, the ratchet and ratchet engage to achieve unidirectional rotation. Once the movable locking pin is pushed, the ratchet disengages from the ratchet (a spring can be installed at the end of the movable locking pin to achieve reciprocating motion), achieving bidirectional rotation.

[0051] In the second method, the locking component 32 is a half-vertical plate 3211. This half-vertical plate 3211 is simply half of the long strip vertical plate 321. In order to release the one-way meshing restriction of the teeth 322 on the rotating wheel component 31, the rotating wheel component 31 can be directly pushed to slide axially and disengage from the teeth 322 on the half-vertical plate 3211 (e.g., Figure 9 As shown, the sliding direction of the rotating wheel 31 is parallel to the width direction of the half vertical plate 3211.

[0052] With the above design, the fitting accuracy between the rotating wheel 31 and the locking part 32 can be improved.

[0053] The toothed section 322 can also be fitted with fins, but the thickness of the fins affects the installation space.

[0054] Preferably, the track aluminum profile unit further includes a second profile 4 fixedly positioned on the support leg 111, and the first profile 2 is slidably positioned on the second profile 4; Viewed from a cross-sectional perspective, the second profile 4 includes a second horizontal plate 41, and a sliding bracket 42 is provided at each end of the second horizontal plate 41, with the two sliding brackets 42 arranged symmetrically. The slide frame 42 includes a first vertical slide plate 421, a first horizontal slide plate 422, and a second vertical slide plate 423. The side of the first vertical plate 421 of the slide block is integrally connected to the end of the second horizontal plate 41. The first vertical plate 421, the first horizontal plate 422, and the second vertical plate 423 of the slide block are sequentially connected and combined to form a U-shaped structure. The length of the first vertical plate 421 of the slide is greater than the length of the second vertical plate 423 of the slide.

[0055] The above design facilitates the positioning of the groove-shaped structure during assembly. If the groove-shaped structure were to slide directly onto the support leg 111, the rotating wheel 31 would need to be directly fixed to the support leg 111, requiring all components to be removed during subsequent maintenance. However, with the second profile 4, the operator can simply remove the second profile 4 to disassemble the entire track aluminum profile unit.

[0056] Preferably, the end of the first vertical plate 421 of the slide block away from the first horizontal plate 422 of the slide block has a slide block bending plate 424, which is formed by bending the end of the first vertical plate 421 of the slide block towards the end away from the second horizontal plate 41 at a set angle (the set angle is a right angle). The ends of the first vertical plate 21 and the second vertical plate 23 of the sliding cover are integrally connected with a third horizontal plate 211. The extension line of the third horizontal plate 211 in the length direction is perpendicular to the extension line of the first vertical plate 21 or the second vertical plate 23 of the sliding cover in the length direction. The extension line of the third horizontal plate 211 in the length direction is perpendicular to the extension line of the first vertical plate 421 of the slide block. The third horizontal plate 211 is provided with an abutting bending plate 212 at one end near the first vertical plate 421 of the slide block. The abutting bending plate 212 is formed by bending the third horizontal plate 211 toward the slide block bending plate 424 at a set angle (the set angle is a right angle). Through the cooperation between the abutting bending plate 212 and the slide block bending plate 424, the groove-shaped structure is slidably positioned relative to the support leg 111.

[0057] The above design allows the grooved structure to be combined with the U-shaped structure to ensure good stability during sliding.

[0058] Specifically, through the cooperation of the abutting bending plate 212 and the sliding bending plate 424, an abutting and overlapping structure can be formed. In this way, the movement between the groove-shaped structure and the U-shaped structure can only be along the length direction of the groove-shaped structure and cannot be along the width direction or the thickness direction.

[0059] Preferably, the third horizontal plate 211 has a guide groove 2111 recessed on the side surface facing the slide frame 42; The guide groove 2111 is provided corresponding to the second vertical plate 423 of the slide block, and the end of the second vertical plate 423 of the slide block is embedded in the guide groove 2111.

[0060] The above design can further ensure the stability of the groove-shaped structure and the U-shaped structure during relative movement.

[0061] By embedding the end of the second vertical plate 423 of the slide block into the guide groove 2111, the lateral displacement of the groove-shaped structure along the width direction of the groove-shaped structure during sliding can be effectively limited, improving the smoothness and accuracy of sliding. At the same time, the cooperation between the guide groove 2111 and the second vertical plate 423 of the slide block can also share part of the structural load, reduce wear, and extend service life.

[0062] Preferably, a groove block 221 with a first groove is provided on one end surface of the first horizontal plate 22 of the sliding cover near the first vertical plate 21 of the sliding cover. The groove block 221 is disposed in the groove-shaped structure, and the opening of the first groove faces the slide frame 42. A limiting block 213 is provided on the third horizontal plate 211 at the end of the first vertical plate 21 of the sliding cover. The limiting block 213 is disposed in the groove-shaped structure and is parallel to and spaced apart from the abutting bending plate 212. The limiting block 213 and the abutting bending plate 212 are combined to form a second groove. The openings of the first groove and the second groove are arranged opposite to each other and combined to form a restricted area; The locking element 32 is configured to be positioned within the restricted area.

[0063] With the above design, the locking component 32 can be quickly positioned and installed. Specifically, by directly positioning the locking component 32 within the restricted area, the teeth 322 can quickly mesh with the rotating wheel 31, achieving precise meshing transmission without additional adjustments, thus improving assembly efficiency and structural compactness. At the same time, the restricted area provides multi-directional limiting for the locking component 32, effectively preventing it from shifting or disengaging during movement, ensuring stable and reliable transmission.

[0064] Preferably, when two main ladders 11 are provided, the two main ladders 11 are arranged opposite each other, and the upper ends of the opposite support legs 111 of the two main ladders 11 are hinged to form a A-frame ladder structure.

[0065] The above design enables the aluminum profile rail unit to be adapted to different ladders 1.

[0066] Preferably, the rotating wheel 31 includes a gear 311, and a rotating shaft 312 positioned on the third horizontal plate 211 is provided on the axis of the gear 311. The axis of the rotating shaft 312 is perpendicular to the extension line of the length direction of the third horizontal plate 211, and the rotating shaft 312 passes through the support leg 111.

[0067] With the above design, the rotating shaft 312 can restrict the gear 311, making the gear 311 more stable when rotating around the axis of the rotating shaft 312.

[0068] Working principle: First, install the track aluminum profile unit; that is, first fix the second profile 4 onto the support leg 111, and then insert and position the first profile 2 onto the second profile 4, as follows. Figure 4 and Figure 5 The direct guides the abutting bending plate 212 and the sliding bending plate 424 to abut against each other, while driving the gear 311 to mesh with the tooth hole 3221 on the long strip vertical plate 321 positioned in the restricted area.

[0069] In subsequent use, since gear 311 is in a unidirectional rotation state, it directly pulls the grooved structure, causing it to slide out relative to the support leg 111. When it slides to the required length, the extension and locking of the grooved structure can be achieved by the engagement of any tooth 322 with the rotating wheel 31. Afterwards, once it is necessary to retract the grooved structure, simply release the unidirectional engagement restriction of the tooth 322 with the rotating wheel 31, and the grooved structure can be pushed to slide back.

[0070] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An adjustable ladder horizontal height track aluminum profile unit, the ladder (1) including one or more main ladders (11), the main ladder (11) including two support legs (111) arranged apart, and a track aluminum profile unit is respectively provided on the opposite side surface of the two support legs (111), characterized in that: The track aluminum profile unit includes a first profile (2) and a positioning structure (3); Viewed from the cross-sectional perspective, the first profile (2) includes a sliding cover first vertical plate (21), a sliding cover first horizontal plate (22), and a sliding cover second vertical plate (23). The sliding cover first vertical plate (21), the sliding cover first horizontal plate (22), and the sliding cover second vertical plate (23) are connected and combined in sequence to form a groove-shaped structure with an opening. The opening of the groove-shaped structure is directly opposite to the support leg (111) and is slidably disposed relative to the support leg (111) to form an extended state and a retracted state. The sliding direction of the groove-shaped structure is parallel to the length direction of the support leg (111). The positioning structure (3) acts on the groove-shaped structure and the support leg (111). The positioning structure (3) includes a rotating wheel (31) and a locking member (32). One of the rotating wheel (31) and the locking member (32) is set on the groove-shaped structure, and the other is positioned and connected to the support leg (111). The locking member (32) is provided with a plurality of teeth (322) arranged in a linear array and meshing with the toothed blocks on the rotating wheel (31). The rotating wheel (31) has a unidirectional rotation state. In the extended state, the first profile (2) slides out relative to the support leg (111) with a groove-shaped structure, and the rotating wheel (31) is in a unidirectional rotation state. The extension locking of the groove-shaped structure is achieved by the cooperation of any tooth (322) with the rotating wheel (31). In order to enter the retracted state, the one-way engagement restriction of the teeth (322) on the rotating wheel (31) is released, and the groove-shaped structure slides back relative to the support leg (111).

2. The adjustable ladder leveling track aluminum profile unit according to claim 1, characterized in that: The locking component (32) includes a long strip vertical plate (321), which is disposed in the groove structure and positioned and connected to the groove structure. The long strip vertical plate (321) is parallel to and spaced apart from the second vertical plate (23) of the sliding cover. The toothed portion (322) is disposed on the elongated vertical plate (321), and the toothed portion (322) includes a toothed hole (3221) formed recessed in the surface of the elongated vertical plate (321). The rotating wheel (31) also has a bidirectional rotation state. In the retracted state, the rotating wheel (31) enters the bidirectional rotation state to release the unidirectional meshing restriction of the teeth (322) on the rotating wheel (31).

3. The adjustable ladder leveling track aluminum profile unit according to claim 1, characterized in that: The track aluminum profile unit also includes a second profile (4) fixedly positioned on the support leg (111), and the first profile (2) is slidably positioned on the second profile (4); Viewed from the cross-sectional perspective, the second profile (4) includes a second horizontal plate (41), and a slide bracket (42) is provided at each end of the second horizontal plate (41), and the two slide brackets (42) are arranged symmetrically. The slide frame (42) includes a first vertical slide plate (421), a first horizontal slide plate (422), and a second vertical slide plate (423). The side of the first vertical plate (421) of the slide block is integrally connected to the end of the second horizontal plate (41). The first vertical plate (421), the first horizontal plate (422), and the second vertical plate (423) of the slide block are sequentially connected and combined to form a U-shaped structure. The length of the first vertical plate (421) of the slide is greater than the length of the second vertical plate (423) of the slide.

4. The adjustable ladder leveling track aluminum profile unit according to claim 3, characterized in that: The first vertical plate (421) of the slide block has a slide block bending plate (424) at the end away from the first horizontal plate (422) of the slide block. The slide block bending plate (424) is formed by bending the end of the first vertical plate (421) of the slide block at a set angle toward the end away from the second horizontal plate (41). The ends of the first vertical plate (21) and the second vertical plate (23) of the sliding cover are integrally connected with a third horizontal plate (211). The extension line of the third horizontal plate (211) in the length direction is perpendicular to the extension line of the first vertical plate (21) or the second vertical plate (23) of the sliding cover in the length direction. The extension line of the third horizontal plate (211) in the length direction is perpendicular to the extension line of the first vertical plate (421) of the slide block in the length direction. The third horizontal plate (211) is provided with an abutting bending plate (212) at one end near the first vertical plate (421) of the slide block. The abutting bending plate (212) is formed by bending the third horizontal plate (211) towards the slide block bending plate (424) at a set angle. Through the cooperation between the abutting bending plate (212) and the slide block bending plate (424), the groove-shaped structure is slidably positioned relative to the support leg (111).

5. The adjustable ladder leveling track aluminum profile unit according to claim 4, characterized in that: The third horizontal plate (211) has a guide groove (2111) recessed on the side of the slide frame (42). The guide groove (2111) is provided corresponding to the second vertical plate (423) of the slide block, and the end of the second vertical plate (423) of the slide block is embedded in the guide groove (2111).

6. The adjustable ladder leveling track aluminum profile unit according to claim 4, characterized in that: The sliding cover first horizontal plate (22) has a groove block (221) with a first groove on one end surface near the sliding cover first vertical plate (21). The groove block (221) is located in the groove-shaped structure, and the opening of the first groove faces the slide frame (42). A limiting block (213) is provided on the third horizontal plate (211) at the end of the first vertical plate (21) of the sliding cover. The limiting block (213) is provided in the groove-shaped structure and is parallel to and spaced apart from the abutting bending plate (212). The limiting block (213) and the abutting bending plate (212) are combined to form a second groove. The openings of the first groove and the second groove are arranged opposite to each other and combined to form a restricted area; The locking element (32) is configured to be positioned within the restricted area.

7. The adjustable ladder leveling track aluminum profile unit according to claim 1, characterized in that: When two main ladders (11) are set, the two main ladders (11) are set opposite each other, and the upper ends of the opposite support legs (111) of the two main ladders (11) are hinged to form a A-frame ladder structure.

8. The adjustable ladder leveling track aluminum profile unit according to claim 2, characterized in that: The rotating wheel component (31) includes a gear (311), and a rotating shaft (312) positioned on the third horizontal plate (211) is provided on the axis of the gear (311). The axis of the rotating shaft (312) is perpendicular to the extension line of the length direction of the third horizontal plate (211), and the rotating shaft (312) passes through the support leg (111).

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