Ladder stand based on a draw guiding structure

Abstract

The utility model provides a kind of based on pulling type guiding structure's lifting ladder stand, including multiple ladder body, each ladder body includes climbing board and the connecting groove fixedly connected respectively in the both sides of climbing board, multiple foot hole along its length direction arrangement is opened in climbing board, two ladder bodies adjacent are connected by head-tail insertion, the connecting groove in inner layer is inserted in the connecting groove in outer layer, and one end of ladder body is fixedly connected with spring pin, and the both ends of ladder body are respectively provided with the adjusting hole for spring pin to extend out. By setting ladder stand as by multiple head-tail insertion ladder body composition, and the connecting groove in inner layer is inserted in the connecting groove in outer layer, to form the structure of individual sleeve. When the ladder stand is stored, press spring pin to realize the unlocking between ladder body, and the ladder body in inner layer is inserted into outer layer ladder body by sliding upward, realize the quick storage of ladder stand, single person can complete operation, and the combination limiting of connecting groove and spring pin improves the stability of ladder stand.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment technology for special vehicles, and in particular to a lifting ladder based on a pull-out guide structure. Background Technology

[0002] Currently, special vehicles generally employ two types of access methods: one is a fixed welded straight ladder, which occupies side space and cannot be adjusted in height; the other is an external folding ladder. While external folding ladders have storage capabilities, they lack lateral stiffness under load, are cumbersome to operate, and pose a risk of falling from heights. Furthermore, when unfolded, they protrude from the vehicle body, affecting maneuverability. These shortcomings are particularly prominent in specialized scenarios such as emergency rescue vehicles, aerial work platforms, and repair vehicles, necessitating a new type of lifting ladder that combines structural stability, ease of operation, and environmental adaptability. Utility Model Content

[0003] This utility model provides a lifting ladder based on a pull-out guide structure to solve the problem of inconvenient ladder deployment and retraction in the prior art.

[0004] This utility model provides a lifting ladder based on a pull-out guide structure, including multiple ladder bodies. Each ladder body includes a climbing board and connecting grooves fixedly connected to both sides of the climbing board. The connecting grooves are U-shaped grooves, and the ports of the two connecting grooves are arranged opposite each other. The climbing board has multiple foot holes arranged along its length. Adjacent ladder bodies are connected by end-to-end insertion. The connecting groove in the inner layer is inserted into the connecting groove in the outer layer. A spring pin is fixedly connected to one end of each ladder body, and adjustment holes for the spring pin to extend are provided at both ends of each ladder body.

[0005] Furthermore, a support plate is fixedly connected to the bottom of each foot hole, and the support plate is perpendicular to the climbing board.

[0006] Furthermore, the support plate and the connecting groove are located on the same side of the climbing board. The ladder body includes a base disposed on the outermost layer and a first-level ladder inserted into the inner side of the base. An installation bracket is fixedly connected to the base. The climbing board of the base protrudes to the side away from the first-level ladder. A gap is provided between the support plate of the base and the climbing board of the first-level ladder.

[0007] Furthermore, the ladder body also includes a secondary ladder, which is inserted into the inside of the primary ladder. The climbing board of the secondary ladder is recessed away from the climbing board of the primary ladder, and a gap is provided between the support plate of the primary ladder and the climbing board of the secondary ladder.

[0008] Furthermore, the support plate is provided with multiple anti-slip holes.

[0009] Furthermore, multiple adjustment holes are provided, and the adjustment holes are evenly arranged along the length direction of the ladder.

[0010] Furthermore, two spring pins are provided, with one spring pin fixedly connected to each of the two connecting groove sidewalls.

[0011] Furthermore, the spring pin includes a sleeve, a rod, and a spring. The rod is inserted into the sleeve, and one end of the sleeve has a slot for the rod to extend out. The spring is installed in the sleeve and located between the bottom surface of the sleeve and the rod. The outer wall of the sleeve is fixedly connected to the ladder body.

[0012] Furthermore, a piston block is fixedly connected to one end of the pin rod that extends into the pin sleeve, and a limiting protrusion is fixedly connected to the sleeve opening. The limiting protrusion protrudes from the inner wall of the pin sleeve to restrict the piston block from disengaging from the pin sleeve.

[0013] The beneficial effects of this utility model are:

[0014] By designing the ladder as a series of interlocking ladder sections, with the innermost connecting slot inserted into the outermost connecting slot, a nested structure is formed. When using the ladder, the outermost ladder section is fixed in the target position, ensuring the ladder is vertical. To lower and unfold the ladder, the innermost ladder section slides along its length, extending from the bottom of the outermost section. The connecting slot guides the sliding motion, and the pull-out structure increases radial stiffness, minimizing deformation under radial load. When the spring pin moves to the lower adjustment hole, it pops out, locking the positions of adjacent ladder sections. To fold the ladder, pressing the spring pin unlocks the ladder sections, and the innermost section slides upward into the outermost section, allowing for quick folding. This operation can be completed by a single person, and the combination of the connecting slot and spring pin enhances the ladder's stability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0017] Figure 3 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0018] Figure 4 This is a schematic diagram of the climbing board structure on each ladder of this utility model.

[0019] Figure 5 This is a schematic diagram of the spring pin structure of this utility model.

[0020] Figure label:

[0021] 1. Ladder body; 11. Climbing board; 12. Connecting groove; 13. Footrest hole; 14. Adjustment hole; 2. Base; 3. First-level ladder; 4. Second-level ladder; 5. Spring pin; 51. Pin sleeve; 511. Sleeve opening; 512. Limiting protrusion; 52. Pin rod; 521. Piston block; 53. Spring; 54. Sealing block; 6. Support plate; 61. Anti-slip hole; 7. Mounting bracket. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] The following is combined with Figures 1-5This invention describes a lifting ladder based on a pull-out guide structure, comprising multiple ladder bodies 1. Each ladder body 1 includes a climbing plate 11 and connecting grooves 12 fixedly connected to both sides of the climbing plate 11. The connecting grooves 12 are U-shaped grooves, with the ends of the two connecting grooves 12 facing each other. The climbing plate 11 has multiple foot holes 13 arranged along its length. Adjacent ladder bodies 1 are connected by end-to-end insertion. The connecting groove 12 located in the inner layer is inserted into the connecting groove 12 located in the outer layer. A spring pin 5 is fixedly connected to one end of the ladder body 1, and adjustment holes 14 for the spring pin 5 to extend are respectively provided at both ends of the ladder body 1.

[0026] Specifically, such as Figure 1 Figure 2 As shown, the ladder 1 structure includes a climbing board 11 and connecting grooves 12 fixedly connected to both sides of the climbing board 11. The connecting grooves 12 are U-shaped grooves formed by bending the two sides of the board towards the middle. When the ladders 1 are connected by interlocking, the two connecting grooves 12 of one ladder 1 are inserted into the connecting grooves 12 of the other ladder 1, thus forming a sleeve structure of the ladders 1 from the outside to the inside. A spring pin 5 is fixedly connected to one end of the ladder 1, and adjustment holes 14 are respectively provided at both ends of the ladder 1. When the inner ladder 1 slides inside the outer ladder 1, the connecting grooves 12 guide the sliding of the ladder 1. The spring pin 5 extends from the adjustment hole 14 to lock the ladder 1, and the foot hole 13 provides a foothold for the climber.

[0027] The ladder is designed to consist of multiple interlocking ladder bodies 1, with the inner connecting slot 12 inserted into the outer connecting slot 12, forming a nested structure. When using the ladder, the outermost ladder body 1 is fixed in the target position, setting the overall ladder dimensions. When lowering and unfolding the ladder, the inner ladder body 1 slides along its length, extending from the bottom of the outermost ladder body 1. The connecting slot 12 guides the sliding of the ladder body 1. When the spring pin 5 moves to the lower adjustment hole 14, it pops out, locking the position between adjacent ladder bodies 1. When raising and folding the ladder, the spring pin 5 is pressed down, and the inner ladder body 1 slides upwards into the outer ladder body 1 to complete the folding process, enabling quick folding. The combined limiting mechanism of the connecting slot 12 and spring pin 5 enhances the ladder's stability.

[0028] Furthermore, a support plate 6 is fixedly connected to the bottom of each footrest hole 13, and the support plate 6 is perpendicular to the climbing board 11. Specifically, as shown... Figure 4 As shown, the support plate 6 is formed by bending the bottom plate of the foot hole 13 inward at a 90-degree angle towards the inside of the ladder. The support plate 6 increases the traction area for people to climb, making it safer for people to use the ladder.

[0029] Furthermore, the support plate 6 and the connecting groove 12 are located on the same side of the climbing plate 11. The ladder body 1 includes a base 2 set on the outermost layer and a first-level ladder 3 inserted into the inner side of the base 2. An installation bracket 7 is fixedly connected to the base 2. The climbing plate 11 of the base 2 protrudes to the side away from the first-level ladder 3. There is a gap between the support plate 6 of the base 2 and the climbing plate 11 of the first-level ladder 3.

[0030] Specifically, in Example 1, as Figure 2 , Figure 4 As shown, the ladder body 1 has two parts: a base 2 on the outer layer and a first-stage ladder 3 inserted into the inner side of the base 2. The mounting bracket 7 is fixed to the connecting groove 12 of the base 2 by welding. When installing the base 2, the mounting bracket 7 is fixed to the side wall of the vehicle body with bolts, ensuring the base 2 remains vertical. Since the support plate 6 protrudes inward from the climbing plate 11, to prevent the first-stage ladder 3 from sliding into the base 2 and causing contact between the support plate 6 of the base 2 and the climbing plate 11 of the first-stage ladder 3, the climbing plate 11 of the base 2 protrudes away from the first-stage ladder 3, creating a gap between the support plate 6 of the base 2 and the climbing plate 11 of the first-stage ladder 3, ensuring that the first-stage ladder 3 can smoothly retract into the base 2.

[0031] In embodiment 2, the ladder body 1 also includes a secondary ladder 4, which is inserted into the inner side of the primary ladder 3. The climbing board 11 of the secondary ladder 4 is recessed away from the climbing board 11 of the primary ladder 3, and a gap is provided between the support plate 6 of the primary ladder 3 and the climbing board 11 of the secondary ladder 4. Specifically, as shown... Figure 3 , Figure 4 As shown, based on Embodiment 1, the ladder body 1 in this embodiment further includes a secondary ladder 4, which is inserted into the inner side of the primary ladder 3. Since the support plate 6 protrudes inward from the climbing plate 11, in order to prevent the support plate 6 of the primary ladder 3 from contacting the climbing plate 11 of the secondary ladder 4 and causing obstruction when the secondary ladder 4 slides into the primary ladder 3, the climbing plate 11 of the secondary ladder 4 is set to be recessed away from the primary ladder 3. A gap is provided between the support plate 6 of the primary ladder 3 and the climbing plate 11 of the secondary ladder 4 to ensure that the secondary ladder 4 can smoothly retract into the primary ladder 3. In use, solid lithium-based lubricating oil can be applied between the base 2, the primary ladder 3 section, and the secondary ladder 4 section to reduce friction when the ladder sections are pulled out.

[0032] Furthermore, the support plate 6 has multiple anti-slip holes 61.

[0033] Specifically, such as Figure 4 As shown, the anti-slip holes 61 are 10mm deep and 50mm apart. The design of the anti-slip holes 61 is more conducive to the drainage of water and snow, and increases the friction coefficient of the ladder in wet and slippery conditions.

[0034] Furthermore, multiple adjustment holes 14 are provided, and the adjustment holes 14 are evenly arranged along the length direction of the ladder body 1. The extension length of the ladder can be adjusted by inserting spring pins 5 into different adjustment holes 14.

[0035] Furthermore, there are two spring pins 5, with one spring pin 5 fixedly connected to each side wall of the two connecting grooves 12.

[0036] Specifically, such as Figure 4 As shown, each of the two connecting slots is fixedly connected to a spring pin 5, forming a double safety barrier through the two spring pins 5, which further improves the stability of locking between the two adjacent ladder bodies 1.

[0037] Furthermore, the spring pin 5 includes a pin sleeve 51, a pin rod 52, and a spring 53. The pin rod 52 is inserted into the pin sleeve 51. One end of the pin sleeve 51 is provided with a sleeve opening 511 for the pin rod 52 to extend out. The spring 53 is installed in the pin sleeve 51 and is located between the bottom surface of the pin sleeve 51 and the pin rod 52. The outer wall of the pin sleeve 51 is fixedly connected to the ladder body 1.

[0038] Furthermore, a piston block 521 is fixedly connected to one end of the pin 52 that extends into the pin sleeve 51, and a limiting protrusion 512 is fixedly connected to the sleeve opening 511. The limiting protrusion 512 protrudes from the inner wall of the pin sleeve 51 to restrict the piston block 521 from disengaging from the pin sleeve 51.

[0039] Specifically, such as Figure 5 As shown, pin 52 is slidably connected to pin sleeve 51 via piston block 521. Pin 52 extends from one end of pin sleeve 51, and sealing block 54 is fixedly connected to the other end of pin sleeve 51. Sealing block 54 is welded to pin sleeve 51, thus forming the bottom surface of pin sleeve 51. Spring 53 is kept in a compressed state, applying a thrust to piston block 521, thereby pushing pin 52 out of pin sleeve 51. The preload of spring 53 is set to 50N to prevent accidental retraction. Limiting protrusion 512 contacts sealing block 54, thereby preventing piston block 521 and pin 52 from disengaging from pin sleeve 51.

[0040] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting ladder based on a pull-out guide structure, characterized in that: The system includes multiple ladders, each ladder comprising a climbing board and connecting grooves fixedly connected to both sides of the climbing board. The connecting grooves are U-shaped, with the ends of the two connecting grooves facing each other. The climbing board has multiple foot holes arranged along its length. Adjacent ladders are connected by end-to-end insertion. The connecting groove in the inner layer is slidably inserted into the connecting groove in the outer layer. One end of each ladder is fixedly connected to a spring pin, and both ends of the ladder are provided with adjustment holes for the spring pin to extend out.

2. The lifting ladder based on a pull-out guide structure according to claim 1, characterized in that: Each footrest hole has a support plate fixedly connected to its bottom, and the support plate is perpendicular to the climbing board.

3. The lifting ladder based on a pull-out guide structure according to claim 2, characterized in that: The support plate and the connecting groove are located on the same side of the climbing board. The ladder body includes a base set on the outermost layer and a first-level ladder inserted into the inner side of the base. An installation bracket is fixedly connected to the base. The climbing board of the base protrudes to the side away from the first-level ladder. There is a gap between the support plate of the base and the climbing board of the first-level ladder.

4. The lifting ladder based on a pull-out guide structure according to claim 3, characterized in that: The ladder also includes a secondary ladder, which is inserted into the inside of the primary ladder. The climbing board of the secondary ladder is recessed away from the climbing board of the primary ladder, and a gap is provided between the support plate of the primary ladder and the climbing board of the secondary ladder.

5. The lifting ladder based on a pull-out guide structure according to any one of claims 2-4, characterized in that: The support plate has multiple anti-slip holes.

6. The lifting ladder based on a pull-out guide structure according to any one of claims 1-4, characterized in that: The adjustment holes are provided in multiple ways and are evenly arranged along the length of the ladder.

7. The lifting ladder based on a pull-out guide structure according to any one of claims 1-4, characterized in that: Two spring pins are provided, with one spring pin fixedly connected to each of the two connecting groove sidewalls.

8. The lifting ladder based on a pull-out guide structure according to any one of claims 1-4, characterized in that: The spring pin includes a sleeve, a rod, and a spring. The rod is inserted into the sleeve. One end of the sleeve has a slot for the rod to extend out. The spring is installed inside the sleeve and is located between the bottom surface of the sleeve and the rod. The outer wall of the sleeve is fixedly connected to the ladder body.

9. The lifting ladder based on a pull-out guide structure according to claim 8, characterized in that: A piston block is fixedly connected to one end of the pin rod that extends into the pin sleeve. A limiting protrusion is fixedly connected to the sleeve opening. The limiting protrusion protrudes from the inner wall of the pin sleeve to prevent the piston block from disengaging from the pin sleeve.

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