Foldable ladder stand and engineering machinery

Abstract

The utility model discloses a foldable ladder stand and engineering machinery, comprising: an inner plate fixed on the engineering machinery; the outer frame is positioned on the outer side of the inner plate; the square tube is installed between the inner plate and the outer frame and comprises a positioning square tube located on the lower portion and a plurality of step square tubes located above the positioning square tube, one ends of the positioning square tube and the step square tubes are hinged to the inner plate, the other ends of the positioning square tube and the step square tubes are hinged to the outer frame, and oppositely-arranged grooves are formed between the inner plate and the outer frame; when the positioning square tube and the step square tube rotate anticlockwise until the outer frame is in contact with the inner plate, the ladder stand is in a folded state, and when the positioning square tube and the step square tube rotate clockwise to be horizontal, the ladder stand is in an unfolded state. According to the folding ladder stand, the ladder stand can be opened and closed in time, when the folding ladder stand is in a completely unfolded state, the structure stability is high, the folding ladder stand is suitable for high-strength operation, when the folding ladder stand is in a completely folded state, the positioning square pipes and the ladder square pipes are located in the grooves of the inner plate and the outer frame, the occupied space is small, and the safety is high.

Description

Technical Field

[0001] The utility model relates to a foldable ladder and construction machinery, belonging to the field of construction machinery. Background Art

[0002] At present, there are various types of construction machinery vehicles, and different vehicles are applied in different fields. In many cases, it is necessary to climb to the top of the vehicle for operation, and at this time, a ladder is essential. Most of the existing ladders are non-foldable and need to rely on the vehicle body or other objects to stand, which is extremely inconvenient to operate. Moreover, they cannot be folded, occupy a large space, and are inconvenient to carry. Summary of the Invention

[0003] Aiming at the problems existing in the above-mentioned prior art, the utility model provides a foldable ladder and construction machinery, which are convenient to use and occupy a small space.

[0004] In order to achieve the above purpose, a foldable ladder adopted by the utility model includes:

[0005] An inner plate, which is fixed on the construction machinery;

[0006] An outer frame, which is located outside the inner plate;

[0007] Square tubes, which are installed between the inner plate and the outer frame, including a positioning square tube located below and a plurality of stepped square tubes located above the positioning square tube. One end of the positioning square tube and the stepped square tubes is hinged to the inner plate, and the other end is hinged to the outer frame. Grooves are arranged oppositely between the inner plate and the outer frame. When the positioning square tube and the stepped square tubes rotate counterclockwise until the outer frame contacts the inner plate, the ladder is in a folded state. When the positioning square tube and the stepped square tubes rotate clockwise to the horizontal, the ladder is in an unfolded state.

[0008] In some embodiments, a support is installed on the inner side of the inner plate, and the support is welded on the construction machinery.

[0009] In some embodiments, inclined surfaces facilitating rotation are provided at both ends of the positioning square tube and the stepped square tubes.

[0010] In some embodiments, a first groove is formed on the outer side of the inner plate, and a second groove is formed on the inner side of the outer frame.

[0011] In some embodiments, the width of the first groove is greater than the width of the outer frame. When the ladder is in a folded state, the outer frame is installed in the first groove.

[0012] In some embodiments, an installation hole is formed at the lower end of the inner plate, and a D-shaped safety pin with an anti-loss rope is installed in the installation hole. A limiting hole matching the installation hole is formed on the positioning square tube.

[0013] In some embodiments, a plurality of handles are welded on the outer frame.

[0014] In some embodiments, both ends of the positioning square pipe are hinged to the inner plate and the outer frame through a pin shaft assembly, both ends of the stepped square pipe are hinged to the inner plate and the outer frame through a pin shaft assembly, and the pin shaft assembly includes a pin shaft and a washer.

[0015] In some embodiments, the lengths of the positioning square pipe and the stepped square pipe are both smaller than the distance between two adjacent hinge points within the inner plate or the outer frame.

[0016] In a second aspect of the present utility model, a construction machine is provided, and the foldable ladder described above is installed on the construction machine.

[0017] Compared with the prior art, the foldable ladder of the present utility model can realize the timely opening and closing of the ladder. When the foldable ladder is in a fully unfolded state, the structural stability is relatively strong, and it is suitable for high-intensity operations. When the foldable ladder is in a fully folded state, the positioning square pipe and the stepped square pipe are located in the grooves of the inner plate and the outer frame, occupying a small space, preventing the construction machine vehicle from being over-wide, and having relatively strong safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the unfolded state of the ladder of the present utility model;

[0020] Figure 2 It is a schematic diagram of the folded state of the ladder of the present utility model;

[0021] Figure 3 For Figure 2 the right view;

[0022] Figure 4 It is a schematic diagram of the structure of the pin shaft assembly of the present utility model;

[0023] Figure 5 It is a partial cross-sectional view of the unfolded state of the ladder of the present utility model;

[0024] Figure 6 It is a partial cross-sectional view of the folded state of the ladder of the present utility model;

[0025] Figure 7 It is a partial enlarged view of the lower end of the ladder of the present utility model;

[0026] In the figure: 1. Inner plate, 11. First groove, 2. Positioning square tube, 21. First inclined surface, 22. Limit hole, 3. Outer frame, 31. Second groove, 4. Handle, 5. Step square tube, 51. Second inclined surface, 6. Pin shaft assembly, 61. Pin shaft, 62. First washer, 63. Second washer, 7. Support, 8. D-shaped safety pin with anti-loss rope. Detailed implementation mode

[0027] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions of this application will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of this application and the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. Without conflict, the technical features in the embodiments of this application and the embodiments can be combined with each other.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protection content of the present utility model.

[0029] As Figures 1 - 7 shown, a foldable ladder includes an inner plate 1 fixed on a construction machinery, an outer frame 3 installed on the outer side of the inner plate 1, and a square tube installed between the inner plate 1 and the outer frame 3;

[0030] The square tube includes a positioning square tube 2 located below and a plurality of step square tubes 5 arranged at equal intervals above the positioning square tube 2. One end of the positioning square tube 2 and the step square tubes 5 is hinged to the inner plate 1, and the other end is hinged to the outer frame 3. Oppositely arranged grooves are provided between the inner plate 1 and the outer frame 3;

[0031] When the positioning square tube 2 and the step square tubes 5 rotate counterclockwise around the hinge point on the inner plate 1 until the outer frame 3 contacts the inner plate 1, the ladder is in a folded state. When the positioning square tube 2 and the step square tubes 5 rotate clockwise around the hinge point on the inner plate 1 to the horizontal, the ladder is in an unfolded state.

[0032] In some embodiments, as Figure 1 , Figure 7 shown, a support 7 is installed on the inner side (the side close to the construction machinery) of the inner plate 1. The support 7 can be directly welded to the water tank part or other suitable positions of the engineering vehicle, so that the foldable ladder can be fixed on the engineering vehicle and move with the vehicle, facilitating the staff to get on and off the vehicle for operation.

[0033] In some embodiments, as Figure 5As shown, both ends of the positioning square pipe 2 and the stepped square pipe 5 are provided with inclined surfaces that facilitate rotation. Specifically, on the upper side of the inner end (the end installed on the inner plate 1) of the positioning square pipe 2, there is an inclined surface one 21, and the lower side is a plane. On the upper side of the outer end (the end installed on the outer frame 3) of the positioning square pipe 2, it is a plane, and on the lower side, there is an inclined surface one 21. Similarly, on the stepped square pipe 5, the same structure of inclined surface two 51 and plane arrangement is adopted. When the folding ladder is in a fully unfolded state, the end planes of both ends of the positioning square pipe 2 and the stepped square pipe 5 are respectively in close contact with the vertical surfaces of the inner plate 1 and the outer frame 3. When a worker steps on the ladder, under the action of gravity, the contact between the end planes of the positioning square pipe 2 and the stepped square pipe 5 and the inner plate 1 and the outer frame 3 becomes tighter and tighter, restricting the positioning square pipe 2 and the stepped square pipe 5 from rotating downward around the hinge points on the inner plate 1 and the outer frame 3, thus ensuring that the ladder is always in a fully unfolded state during operation.

[0034] In some embodiments, as Figure 2 、 Figure 5 and Figure 6 shown, a groove one 11 is opened on the outer side of the inner plate 1, and a groove two 31 is opened on the inner side of the outer frame 3. Both the inner plate 1 and the outer frame 3 are designed in a grooved form, and the width of the outer frame 3 is smaller than the width of the inner plate 1. When the positioning square pipe 2 rotates upward counterclockwise by 85°, it drives the outer frame 3 to fold inward. When the ladder is in a fully folded state, the outer plane of the outer frame 3 is parallel to the inner plane of the inner plate 1, and a small part of the inner side of the outer frame 3 extends into the groove one 11. At this time, the positioning square pipe 2 and multiple stepped square pipes 5 are all completely inside the grooves of the inner plate 1 and the outer frame 3, greatly saving space and preventing the width of the engineering vehicle from exceeding the national standard width.

[0035] In some embodiments, as Figure 1 、 Figure 5 and Figure 7 shown, an installation hole is opened at the lower end of the inner plate 1, and a D-shaped safety pin 8 with an anti-loss rope is installed in the installation hole. A limit hole 22 matching the installation hole is opened on the positioning square pipe 2. When the positioning square pipe 2 rotates upward by 85°, the ladder is in a fully folded state. At this time, the limit hole 22 on the positioning square pipe 2 coincides completely with the installation hole on the inner plate 1, and the D-shaped safety pin 8 with an anti-loss rope is inserted for limiting, which can prevent the ladder from unfolding due to bumps during the driving of the engineering vehicle, prevent the engineering vehicle from being over-wide, and increase the reliability and safety.

[0036] In some embodiments, as Figures 1 - 3 shown, a plurality of handles 4 are welded on the outer frame 3, and the safety during climbing up and down the ladder is improved through the handles 4.

[0037] In some embodiments, as Figure 1 、 Figure 2 、 Figures 4 - 6As shown, both ends of the positioning square pipe 2 are hinged to the inner plate 1 and the outer frame 3 through the pin shaft assembly 6, and both ends of the stepped square pipe 5 are hinged to the inner plate 1 and the outer frame 3 through the pin shaft assembly 6. The pin shaft assembly 6 includes a pin shaft 61 and washers. Both ends of the pin shaft 61 are welded to the inner plate 1 or the outer frame 3 to prevent the pin shaft 61 from slipping out during operation. The square pipe is connected to the inner plate 1 or the outer frame 3 by passing the pin shaft 61 through the square pipe. Washers 62, washers 63, etc. are installed at both ends of the pin shaft 61 to prevent the positioning square pipe 2 and the stepped square pipe 5 from shaking on the pin shaft 61.

[0038] In some embodiments, as Figure 6 shown, the lengths of the positioning square pipe 2 and the stepped square pipe 5 are both less than the distance between two adjacent hinge points inside the inner plate 1 or the outer frame 3. Specifically, the distance between two adjacent hinge points inside the inner plate 1 or the outer frame 3 is greater than the length of any stepped square pipe 5 and also greater than the length of the positioning square pipe 2. This can ensure that when the folding ladder is in a fully folded state, there will be no interference between the positioning square pipe 2 and the stepped square pipe 5, or between adjacent stepped square pipes 5, making the folding ladder structure more stable and reliable.

[0039] In the second aspect of the present invention, a construction machine is provided, and the foldable ladder described above is installed on the construction machine.

[0040] The foldable ladder of the present invention can realize the timely opening and closing of the ladder. When the foldable ladder is in a fully unfolded state, it has strong structural stability and is suitable for high-intensity operations. When the foldable ladder is in a fully folded state, the positioning square pipe and the stepped square pipe are located in the grooves of the inner plate and the outer frame, occupying a small space, preventing the construction machinery vehicle from being over-wide, and having strong safety.

[0041] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features contained in other embodiments rather than other features, the combination of the features of different embodiments also means being within the protection scope of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

Claims

1. A foldable ladder, characterized in that: include: An inner plate (1) fixed to the construction machinery; An outer frame (3) located outside the inner plate (1); A square tube is installed between an inner plate (1) and an outer frame (3), comprising a positioning square tube (2) located below and a plurality of stepped square tubes (5) located above the positioning square tube (2), one end of the positioning square tube (2) and the stepped square tube (5) being hinged to the inner plate (1), and the other end being hinged to the outer frame (3), and grooves arranged opposite to each other are provided between the inner plate (1) and the outer frame (3); when the positioning square tube (2) and the stepped square tube (5) are rotated counterclockwise until the outer frame (3) contacts the inner plate (1), the ladder is in a folded state, and when the positioning square tube (2) and the stepped square tube (5) are rotated clockwise to a horizontal state, the ladder is in an unfolded state.

2. A foldable ladder according to claim 1, characterized in that: A support (7) is installed on the inner side of the inner plate (1), and the support (7) is welded to the engineering machinery.

3. A foldable ladder according to claim 1, characterized in that: Both ends of the positioning square tube (2) and the stepped square tube (5) are provided with inclined surfaces for easy rotation.

4. A foldable ladder according to claim 1, characterized in that: The outer side of the inner plate (1) is provided with a first groove (11), and the inner side of the outer frame (3) is provided with a second groove (31).

5. A foldable ladder according to claim 4, characterized in that: The width of the groove one (11) is greater than the width of the outer frame (3); when the ladder is in a folded state, the outer frame (3) is installed in the groove one (11).

6. A foldable ladder according to claim 4 or 5, characterized in that: The lower end of the inner plate (1) is provided with a mounting hole, in which a D-shaped safety pin (8) with an anti-lost rope is installed, and the positioning square tube (2) is provided with a limiting hole (22) that matches the mounting hole.

7. A foldable ladder according to claim 1, characterized in that: A plurality of handles (4) are welded to the outer frame (3).

8. The foldable ladder according to claim 1, characterized in that: The two ends of the positioning square tube (2) are hinged to the inner plate (1) and the outer frame (3) through a pin assembly (6), and the two ends of the stepped square tube (5) are hinged to the inner plate (1) and the outer frame (3) through a pin assembly (6), and the pin assembly (6) includes a pin (61) and a washer.

9. A foldable ladder according to claim 1, characterized in that: The lengths of the positioning square tube (2) and the stepped square tube (5) are both smaller than the distance between two adjacent hinge points in the inner plate (1) or the outer frame (3).

10. An engineering machine, characterized in that: The engineering machinery is equipped with a foldable ladder as described in any one of claims 1 to 9.

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