Crawling ladder structure

Abstract

The utility model provides a crawling ladder structure. The crawling ladder structure comprises a mounting seat, a rotating shaft, at least one torsion spring, a bracket and a pedal, the first end of the support is rotationally connected with the mounting base through a rotating shaft, and the second end of the support is connected with the pedal. The rotating shaft is sleeved with a torsion spring, the first end of the torsion spring abuts against the mounting base, and the second end of the torsion spring abuts against the first end of the support. The pedal has a first upward state perpendicular to the ground and a second horizontal state; the torsion spring is arranged on the rotating shaft, so that the pedal can automatically return to the first state from the second state when no person stands, the crawling ladder structure can be reset without assistance of other personnel, the length of a machine where the crawling ladder is located cannot be increased when the machine works, and the steering flexibility of the whole machine is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of transportation equipment, and particularly relates to a climbing ladder structure. Background Art

[0002] In the aerial work platform industry, all scissor lift and mast-type machines are equipped with access ladders, which can be divided into fixed ladders and movable ladders. Fixed ladders have a simple structure and good strength, but they take up a lot of space, affecting the length of the entire machine. To shorten the length of the entire machine, movable ladders have been derived. Movable ladders can be stowed when not in use, which can effectively reduce the length of the entire machine. However, existing movable ladders need to be manually stowed on the ground. When a single person operates the work platform, the user cannot control the ladder after climbing onto the work platform. The movable ladder in the non-stowed state increases the length of the entire machine while the machine is working, affecting the flexibility of the entire machine's steering. Alternatively, another operator is required to assist in stowing the movable ladder on the ground, which takes up manpower. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a ladder structure with the advantage of automatic reset.

[0004] The ladder structure provided by the utility model includes a mounting seat, a rotating shaft, at least one torsion spring, a bracket and a pedal; the first end of the bracket is rotatably connected to the mounting seat via the rotating shaft, and the second end of the bracket is connected to the pedal; the torsion spring is sleeved on the rotating shaft, the first end of the torsion spring abuts the mounting seat, and the second end of the torsion spring abuts the first end of the bracket;

[0005] The pedal has a first state and a second state:

[0006] In the first state, the pedal is kept vertically facing upward;

[0007] In the second state, the pedal remains horizontal.

[0008] Furthermore, limiting members are provided at both ends of the rotating shaft, and the limiting members limit the translation of the rotating shaft.

[0009] Furthermore, a bent portion is provided at one end of the pedal away from the mounting seat.

[0010] Furthermore, the contact surface of the pedal is provided with anti-slip knurling.

[0011] Furthermore, the ladder structure provided by the present invention also includes a stopper, which is respectively connected to the mounting seat and the first end of the bracket so that the pedal remains in the second state.

[0012] The utility model has the following beneficial effects:

[0013] The ladder structure provided by the utility model has a simple structure, is easy to install, and has a low manufacturing cost. It adopts a rotating opening method, and the pedal has a first state that is vertically upward on the ground and a second state that is horizontal. A torsion spring is arranged on the rotating shaft so that the pedal can automatically return to the first state from the second state when no one is standing. The ladder structure can be reset without the assistance of other personnel, so that the machine where the ladder is located does not increase the extra length when working, thereby ensuring the steering flexibility of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an overall schematic diagram of the ladder structure provided by some embodiments of the present invention.

[0015] Figure 2 This is a left view of the ladder structure provided by some embodiments of the present invention in the first state.

[0016] Figure 3 This is a main view of the ladder structure provided by some embodiments of the present invention in the first state.

[0017] Figure 4 yes Figure 3 The enlarged schematic diagram of part I is shown in the figure.

[0018] Figure 5 It is a partially enlarged left view of the ladder structure provided in some embodiments of the present invention in the second state.

[0019] Description of reference numerals:

[0020] 1 mounting seat, 2 rotating shaft, 3 torsion spring, 4 bracket, 5 pedal, 6 limit piece, 7 stop piece. DETAILED DESCRIPTION

[0021] To more clearly and completely illustrate the technical solution of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0022] It should be noted that the terms "setting", "connection" and "installation" used in this article should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances. Terms indicating direction or position relationship such as "vertical", "horizontal", "left", "right", "inside", "outside", "up", "down", "top", and "bottom" are based on the direction or position relationship shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, nor does it represent the only implementation method. Therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of such features. In addition, it should be noted that the term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0023] like Figure 1-5 As shown, the utility model provides a ladder structure, including a mounting base 1, a rotating shaft 2, at least one torsion spring 3, a bracket 4 and a pedal 5; the first end of the bracket 4 is rotatably connected to the mounting base 1 through the rotating shaft 2, and the second end of the bracket 4 is connected to the pedal 5; the torsion spring 3 is sleeved on the rotating shaft 2, the first end of the torsion spring 3 abuts the mounting base 1, and the second end of the torsion spring 3 abuts the first end of the bracket 4; the pedal 5 has a first state and a second state: in the first state, as shown in FIG. Figure 2 As shown, the pedal 5 is kept vertically upward; in the second state, as shown Figure 1 and Figure 5 As shown, the pedal 5 remains horizontal. The specific installation and use process is as follows: the first end of the torsion spring 3 abuts the mounting seat 1, and the second end abuts on the bracket 4, so that the torsion spring 3 is pre-tightened and compressed. The rotating shaft 2 passes through the main body of the torsion spring 3 and the through holes on the mounting seat 1 and the first end of the bracket 4, rotating the bracket 4 to connect the mounting seat 1 and keep the pedal 5 in the first state of upward vertical position. When the ladder needs to be used, the operator uses his foot to move the pedal 5 to rotate it around the rotating shaft 2 to the second state, so that the ladder can be put into use. When the operator's foot leaves the pedal 5, the pedal 5 automatically resets under the action of the torsion spring 3 and returns to the first state of upward vertical position, avoiding the impact of the machine's activity sensitivity due to the increase in the length of the ladder.

[0024] In some embodiments of the present invention, stoppers 6 are provided at both ends of the rotating shaft 2 to limit the translation of the rotating shaft 2. To prevent the rotating shaft 2 from disengaging from the mounting base 1 and the bracket 4, holes can be opened at both ends of the rotating shaft 2 to insert cotter pins to limit the translation of the rotating shaft 2 from the mounting base 1 and the bracket 4. Alternatively, nuts can be installed at both ends of the rotating shaft 2 to prevent the rotating shaft 2 from disengaging.

[0025] In some embodiments of the present invention, the pedal 5 has a bent portion at one end away from the mounting base 1, and the contact surface of the pedal 5 is provided with anti-slip knurling. The bent portion increases the contact surface between the foot and the pedal 5, making operation more convenient, and the anti-slip knurling increases friction and improves safety.

[0026] In some embodiments of the present invention, the ladder structure further includes a stopper 7, which is connected to the first end of the mounting base 1 and the bracket 4, respectively, to maintain the step 5 in the second state. If it is necessary to maintain the step 5 in the second state for horizontal use, the stopper 7 is connected to the first end of the mounting base 1 and the bracket 4. For example, each of the first ends of the mounting base 1 and the bracket 4 has a through hole. In the second state, the through holes correspond to each other. A latch can be selected as the stopper 7, and the latch is inserted into the corresponding through hole to maintain the step 5 in the second state.

[0027] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A ladder structure, characterized in that: The invention comprises a mounting seat (1), a rotating shaft (2), at least one torsion spring (3), a bracket (4) and a pedal (5); the first end of the bracket (4) is rotatably connected to the mounting seat (1) via the rotating shaft (2), and the second end of the bracket (4) is connected to the pedal (5); the torsion spring (3) is sleeved on the rotating shaft (2), the first end of the torsion spring (3) abuts against the mounting seat (1), and the second end of the torsion spring (3) abuts against the first end of the bracket (4); The pedal (5) has a first state and a second state: In the first state, the pedal (5) remains vertically facing upward; In the second state, the pedal (5) remains horizontal.

2. The ladder structure according to claim 1, characterized in that: Limiting members (6) are provided at both ends of the rotating shaft (2), and the limiting members (6) limit the translation of the rotating shaft (2).

3. The ladder structure according to claim 1, characterized in that: The pedal (5) is provided with a bent portion at one end away from the mounting seat (1).

4. The ladder structure according to claim 1, characterized in that: The contact surface of the pedal (5) is provided with anti-slip knurling.

5. The ladder structure according to any one of claims 1 to 4, characterized in that: It also includes a stopper (7), which is connected to the mounting seat (1) and the first end of the bracket (4) respectively so that the pedal (5) remains in the second state.

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