A foldable ladder

Abstract

The utility model relates to the technical field of ladders, in particular to a foldable ladder, comprising a front ladder frame and a rear ladder frame, the top ends of the front ladder frame and the rear ladder frame being connected with a rotating hinge part on the opposite sides of the front ladder frame and the rear ladder frame, the inner sides of the front ladder frame and the rear ladder frame are both provided with a plurality of groups of outer telescopic sleeves with the same intervals, the inner sides of the outer telescopic sleeves are slidably connected with the inner telescopic rods, the tops of the outer telescopic sleeves and the inner telescopic rods are both fitted with anti-slip rubber strips, the inner sides of the front ladder frame and the rear ladder frame and located at the top are both provided with outer hollow rod sleeves, the inner sides of the outer hollow rod sleeves are slidably connected with the inner extension rods, and the outer sides of the inner extension rods are provided with racks extending along the length direction of the inner extension rods. In the utility model, the unfolded width distance between the two groups of ladder columns of the front ladder frame and the rear ladder frame can be changed according to the use requirements, so that it is suitable for use in different spaces, thereby improving the application range and practicality of the foldable ladder.

Description

Technical Field

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

[0002] Folding ladders are popular because they are foldable, easy to carry and store, and have a wide range of applications. Generally, folding ladders have an A-shaped structure, which is not easy to deform and has good stability. However, existing folding ladders cannot change the horizontal width, resulting in the inability to change the unfolded width of the ladder in different spaces, reducing practicality.

[0003] Therefore, it is particularly important to design a foldable ladder to change the above-mentioned technical defects and improve overall practicality. Utility Model Content

[0004] The purpose of the utility model is to provide a foldable ladder to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The top of the outer telescopic sleeve is connected with the inner telescopic rod, and the top of the outer telescopic sleeve and the inner telescopic rod are both fitted with anti-skid rubber strips.

[0007] As a preferred solution of the present utility model, the connection between the front ladder frame and the rear ladder frame is a rotational connection.

[0008] As a preferred solution of the utility model, the front ladder frame and the rear ladder frame are both composed of two groups of ladder columns that are symmetrically distributed left and right.

[0009] As a preferred solution of the utility model, the external structure size of the inner telescopic rod is adapted to the internal structure size of the outer telescopic sleeve, and the opposite ends of the outer telescopic sleeve and the inner telescopic rod are fixedly mounted on the outside of the ladder column by bolts.

[0010] As a preferred solution of the utility model, the left end of the outer hollow rod sleeve and the right end of the inner extension rod are both fixedly mounted on the outside of the ladder column by bolts.

[0011] As a preferred solution of the utility model, one end of the locking bolt extends to the inside of the gear bracket and is fixedly connected to the gear, and a through hole for the locking bolt to rotate is opened inside the gear bracket.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, a foldable ladder is provided, and the unfolded width distance between the two sets of ladder columns of the front ladder frame and the rear ladder frame can be changed according to the use requirements, so that it is suitable for use in different spaces, thereby improving the application range and practicality of the foldable ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0015] Figure 2 This is a partial structural diagram of the outer telescopic sleeve of the utility model;

[0016] Figure 3 This is a partial structural diagram of the outer hollow rod sleeve of the utility model.

[0017] In the figure: 1, front ladder frame; 2, rear ladder frame; 3, rotating hinge component; 4, outer telescopic sleeve; 401, inner telescopic rod; 402, anti-skid rubber strip; 5, outer hollow rod sleeve; 501, inner extension rod; 502, rack; 503, gear bracket; 504, gear; 505, locking bolt; 506, screw cap; 507, locking nut. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0020] A foldable ladder comprises a front ladder frame 1 and a rear ladder frame 2, wherein the top ends of the front ladder frame 1 and the rear ladder frame 2 facing each other are connected with a rotating hinge component 3, the inner sides of the front ladder frame 1 and the rear ladder frame 2 are both provided with a plurality of sets of outer telescopic sleeves 4 with the same intervals, and the inner sides of the front ladder frame 1 and the rear ladder frame 2 and the positions at the tops are both provided with outer hollow rod sleeves 5;

[0021] The connection between the front ladder frame 1 and the rear ladder frame 2 is a rotation connection, and the front ladder frame 1 and the rear ladder frame 2 are both composed of two groups of ladder columns that are symmetrically distributed on the left and right.

[0022] In this embodiment, please refer to Figure 2 The inner telescopic rod 401 is slidably connected to the inner telescopic sleeve 4, and the tops of the outer telescopic sleeve 4 and the inner telescopic rod 401 are both attached with anti-slip rubber strips 402 to increase the stability of the user's stepping;

[0023] The external structure size of the inner telescopic rod 401 is matched with the internal structure size of the outer telescopic sleeve 4, and the opposite ends of the outer telescopic sleeve 4 and the inner telescopic rod 401 are fixedly mounted on the outside of the ladder column by bolts.

[0024] In this embodiment, please refer to Figure 3 The inner extension rod 501 is slidably connected to the inner part of the outer hollow rod sleeve 5, and a rack 502 extending along the length direction of the inner extension rod 501 is arranged on the outer side of the inner extension rod 501. A gear bracket 503 is arranged on the right end of the top of the outer hollow rod sleeve 5. A gear 504 meshing with the rack 502 is rotatably connected to the inner part of the gear bracket 503. A locking bolt 505 is connected to the outside of the gear bracket 503. A screw cap 506 is connected to one end of the locking bolt 505. A locking nut 507 is threadedly sleeved on the outer side of the locking bolt 505.

[0025] The left end of the outer hollow rod sleeve 5 and the right end of the inner extension rod 501 are fixedly mounted on the outside of the ladder column by bolts, and the locking bolt 505 extends to one end inside the gear bracket 503 and is fixedly connected to the gear 504. A through hole is opened inside the gear bracket 503 for the locking bolt 505 to rotate.

[0026] The working process of the utility model is as follows: when the unfolded width distance between the two sets of ladder columns of the front ladder frame 1 and the rear ladder frame 2 needs to be changed according to the use requirements, the screw cap 506 can be manually rotated to utilize the locking bolt 505 to rotate the gear 504, thereby engaging the driving rack 502 to drive the inner extension rod 501 to be extended and retracted inside the outer hollow rod sleeve 5. During the extension and retraction process, the outer telescopic sleeve 4 and the inner telescopic rod 401 cooperate to shrink, so that it is suitable for use in different spaces, thereby improving the application range and practicality of the folding ladder.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foldable ladder, comprising a front ladder frame (1) and a rear ladder frame (2), characterized in that: The top ends of the front ladder frame (1) and the rear ladder frame (2) facing each other are connected with a rotating hinge component (3); the inner sides of the front ladder frame (1) and the rear ladder frame (2) are provided with a plurality of groups of outer telescopic sleeves (4) with the same spacing; the inner sides of the outer telescopic sleeves (4) are slidably connected with inner telescopic rods (401); the tops of the outer telescopic sleeves (4) and the inner telescopic rods (401) are both fitted with anti-skid rubber strips (402); the inner sides of the front ladder frame (1) and the rear ladder frame (2) and at the top positions are provided with outer hollow rod sleeves (5); the inner sides of the outer hollow rod sleeves (5) are slidably connected with inner extension rods (501), the outer side of the inner extension rod (501) is provided with a rack (502) extending along the length direction of the inner extension rod (501), the right end of the top of the outer hollow rod sleeve (5) is provided with a gear bracket (503), the inside of the gear bracket (503) is rotatably connected with a gear (504) meshing with the rack (502), the outside of the gear bracket (503) is connected with a locking bolt (505), one end of the locking bolt (505) is connected with a screw cap (506), and the outer side of the locking bolt (505) is threadedly sleeved with a locking nut (507).

2. A foldable ladder according to claim 1, characterized in that: The connection between the front ladder frame (1) and the rear ladder frame (2) is a rotational connection.

3. A foldable ladder according to claim 1, characterized in that: The front ladder frame (1) and the rear ladder frame (2) are both composed of two groups of ladder columns that are symmetrically distributed on the left and right.

4. A foldable ladder according to claim 3, characterized in that: The external structure size of the inner telescopic rod (401) is adapted to the internal structure size of the outer telescopic sleeve (4), and the opposite ends of the outer telescopic sleeve (4) and the inner telescopic rod (401) are both fixedly mounted on the outside of the ladder column by bolts.

5. The foldable ladder according to claim 3, characterized in that: The left end of the outer hollow rod sleeve (5) and the right end of the inner extension rod (501) are both fixedly mounted on the outside of the ladder column by means of bolts.

6. A foldable ladder according to claim 1, characterized in that: One end of the locking bolt (505) extending into the interior of the gear bracket (503) is fixedly connected to the gear (504), and a through hole for the locking bolt (505) to rotate is provided inside the gear bracket (503).

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