Movable semitrailer ladder stand

Abstract

The utility model relates to the field of trailer accessories, in particular to a movable semitrailer crawling ladder. The semitrailer crawling ladder comprises a transverse guide rail suitable for being installed on a semitrailer frame; the mounting plate is in sliding connection with the transverse guide rail and is connected with a ladder stand main body; the limiting structure comprises a limiting hole formed in the semitrailer frame and a limiting pin installed on the installation plate in a sliding mode. The multiple limiting holes are formed side by side in the length direction of the transverse guide rail. The driving part is connected with the mounting plate and is configured to drive the mounting plate to slide along the transverse guide rail. The movable semitrailer ladder stand is provided with the transverse guide rail, the mounting plate and the limiting structure, the sliding direction of the mounting plate can be conveniently adjusted, then the transverse distance of the ladder stand body is adjusted, and the requirements for getting on and off of different types of vehicles are met.

Description

Technical Field

[0001] The utility model relates to the field of trailer accessories, in particular to a movable semi-trailer ladder. Background Art

[0002] A trailer ladder is a loading and unloading tool used at a higher position on the rear of a trailer or truck.

[0003] Existing trailer ladders are often hingedly mounted at the rear of the trailer. When lowered, they facilitate boarding and disembarking of construction vehicles. However, in actual use, it has been found that there are many types of construction vehicles, and the distance between vehicles varies. Existing trailer ladders have a fixed horizontal spacing and cannot meet the needs of different types of vehicles getting on and off.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the Invention

[0005] In order to improve or solve the technical problem that trailer ladders in the prior art have fixed transverse spacing and cannot meet the requirements of different types of vehicles getting on and off, the present utility model provides a movable semi-trailer ladder. The semi-trailer ladder includes: a transverse guide rail suitable for installation on the semi-trailer frame; a mounting plate slidably connected to the transverse guide rail and connected to the ladder body; a limiting structure including a limiting hole formed in the semi-trailer frame and a limiting pin slidably mounted on the mounting plate; the limiting holes are arranged side by side along the length of the transverse guide rail; and a driving member connected to the mounting plate and configured to drive the mounting plate to slide along the transverse guide rail.

[0006] In the utility model, a movable semi-trailer ladder includes a transverse guide rail, a mounting plate, a limiting structure and a driving member. Among them, the mounting plate is used to install the ladder body, the transverse guide rail forms a sliding connection with the mounting plate, and can limit the sliding direction of the mounting plate. The driving member is connected to the mounting plate and can drive the mounting plate to slide along the transverse guide rail, thereby adjusting the lateral spacing of the ladder body to meet the needs of different types of vehicles getting on and off. The limiting structure includes a limiting hole provided on the semi-trailer frame and a limiting pin installed on the mounting plate. The limiting pin can be inserted into the limiting hole, thereby limiting the relative position of the transverse guide rail and the mounting plate, preventing the ladder body from moving during use. Through the above-mentioned arrangement, the utility model provides a movable semi-trailer ladder with a transverse guide rail, a mounting plate and a limiting structure, which can more conveniently adjust the sliding direction of the mounting plate, and then adjust the lateral spacing of the ladder body to meet the needs of different types of vehicles getting on and off.

[0007] Furthermore, the driving member is a crowbar that matches the limiting hole, and a through hole that matches the driving member is opened on the mounting plate.

[0008] Furthermore, a bent plate is arranged on the outside of the mounting plate, and a pry hole corresponding to the through hole is provided on the bent plate. With this arrangement, the distance between the bent plate and the semi-trailer frame is greater than the distance between the mounting plate and the semi-trailer frame, which can increase the tilt angle of the pry bar when in use, thereby facilitating the pry bar to drive the mounting plate to slide.

[0009] Furthermore, a plurality of pry holes are arranged side by side along the length direction of the bent plate.

[0010] Furthermore, the driving member is a hydraulic cylinder having one end connected to the semi-trailer frame and the other end connected to the mounting plate.

[0011] Furthermore, a first articulated seat is provided on the semi-trailer frame, and a second articulated seat is provided on the mounting plate; and both ends of the driving member are respectively connected to the first articulated seat and the second articulated seat in an articulated manner.

[0012] Furthermore, a positioning hole is opened on the mounting plate, and the limiting pin is arranged in the positioning hole.

[0013] Furthermore, the transverse guide rail includes an upper guide rail and a lower guide rail that are arranged opposite to each other, and guide grooves that match the mounting plate are provided on both the upper guide rail and the lower guide rail.

[0014] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The mounting plate is used to mount the main body of the ladder. The transverse guide rail forms a sliding connection with the mounting plate, which can limit the sliding direction of the mounting plate. The driving member is connected to the mounting plate and can drive the mounting plate to slide along the transverse guide rail, thereby adjusting the transverse spacing of the main body of the ladder to meet the needs of getting on and off different types of vehicles. The limiting structure includes a limiting hole opened on the semi-trailer frame and a limiting pin installed on the mounting plate. The limiting pin can be inserted into the limiting hole to limit the relative position of the transverse guide rail and the mounting plate, preventing the main body of the ladder from moving during use;

[0016] (2) The distance between the bending plate and the semi-trailer frame is greater than the distance between the mounting plate and the semi-trailer frame, which can increase the tilt angle when the crowbar is used, thereby making it easier for the crowbar to drive the mounting plate to slide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of a first embodiment of a movable semi-trailer ladder of the present utility model;

[0019] Figure 2This is another schematic diagram of the first embodiment of the movable semi-trailer ladder of the utility model;

[0020] Figure 3 This is a schematic diagram of a second embodiment of a movable semi-trailer ladder of the present utility model;

[0021] Figure 4 This is another schematic diagram of the second embodiment of the movable semi-trailer ladder of the present utility model.

[0022] List of reference numerals: 1. lateral guide rail; 11. upper guide rail; 12. lower guide rail; 2. mounting plate; 3. limiting structure; 31. limiting hole; 32. limiting pin; 4. driving member; 5. bending plate; 51. supporting plate; 52. pry hole. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as limiting the utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance.

[0025] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "set," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] To improve or resolve the technical problem that existing trailer ladders have fixed transverse spacing, which cannot meet the requirements of different types of vehicles getting on and off, the present utility model provides a movable semi-trailer ladder. The semi-trailer ladder comprises: a transverse guide rail 1, suitable for installation on the semi-trailer frame; a mounting plate 2, slidably connected to the transverse guide rail 1 and connected to the ladder body; a limiting structure 3, including a limiting hole 31 defined in the semi-trailer frame and a limiting pin 32 slidably mounted on the mounting plate 2; a plurality of limiting holes 31 are arranged side by side along the length of the transverse guide rail 1; and a driving member 4, connected to the mounting plate 2 and configured to drive the mounting plate 2 to slide along the transverse guide rail 1.

[0027] Figure 1 This is a schematic diagram of a first embodiment of a movable semi-trailer ladder of the utility model. Figure 2 This is another schematic diagram of the first embodiment of the movable semi-trailer ladder of the utility model. Figure 3 This is a schematic diagram of a second embodiment of a movable semi-trailer ladder of the utility model. Figure 4 This is another schematic diagram of the second embodiment of the present invention's movable semi-trailer ladder. Figures 1 to 4 As shown, the utility model is a movable semi-trailer ladder comprising a transverse guide rail 1, a mounting plate 2, a limiting structure 3 and a driving member 4.

[0028] See also Figure 1 and Figure 2 In one or more embodiments, the transverse guide rail 1 is suitable for installation on a semi-trailer frame. The transverse guide rail 1 includes an upper guide rail 11 and a lower guide rail 12 arranged opposite each other. Guide grooves that mate with the mounting plate 2 are defined on each of the upper guide rail 11 and the lower guide rail 12. Specifically, the upper guide rail 11 and the lower guide rail 12 are both roughly U-shaped, with the openings of the upper guide rail 11 and the lower guide rail 12 arranged opposite each other. Furthermore, the mounting plate 2 is a roughly rectangular plate, with the upper and lower sides of the mounting plate 2 respectively positioned within the guide grooves. The mounting plate 2 is connected to a ladder body, which is hingedly connected to the mounting plate 2. Furthermore, through-holes are defined in the mounting plate 2, arranged side by side along the length of the mounting plate 2 to facilitate sliding movement of the mounting plate 2 by the drive member 4. Furthermore, a bending plate 5 is disposed on the outside of the mounting plate 2. The bending plate 5 is roughly rectangular, with a first arm arranged perpendicular to the mounting plate 2 and a second arm arranged parallel to the mounting plate 2. Furthermore, the bending plate 5 is also connected to a support plate 51, which is connected to the mounting plate 2 and the second arm and is arranged parallel to the first arm. Furthermore, a pry hole 52 corresponding to the through hole is provided on the bending plate 5. Figure 2In the illustrated orientation, the pry hole 52 and the through hole correspond in the left-right direction, and the projected area of ​​the through hole is larger than the projected area of ​​the pry hole 52. Specifically, multiple pry holes 52 are arranged side by side along the length of the bent plate 5. Exemplarily, the through holes are strip-shaped slots. There are three pry holes 52, two of which are flat on either side, and one in the middle is round.

[0029] Continue to see Figure 1 and Figure 2 The limiting structure 3 includes a limiting hole 31 provided on the semi-trailer frame, and a limiting pin 32 slidably mounted on the mounting plate 2. Specifically, a plurality of limiting holes 31 are arranged side by side along the length direction of the transverse guide rail 1, and the limiting holes 31 correspond to the through holes in the height direction. The projected area of ​​the limiting hole 31 is larger than the projected area of ​​the through hole. Furthermore, a positioning hole is provided on the mounting plate 2, and the limiting pin 32 is arranged in the positioning hole. Specifically, the positioning hole is located at the side position of the mounting plate 2, and the limiting pin 32 passes through the positioning hole and the limiting hole 31, so that the mounting plate 2 and the semi-trailer frame are fixedly connected. Furthermore, the driving member 4 is a crowbar that matches the limiting hole 31. The crowbar passes through the pry hole 52 and the through hole, extends into the limiting hole 31, and drives the mounting plate 2 and the bending plate 5 to slide along the transverse guide rail 1 by tilting the crowbar. The projected area of ​​the pry hole 52 is smaller than the projected area of ​​the through hole, and the projected area of ​​the through hole is smaller than the projected area of ​​the limit hole 31. The mounting plate 2 is too close to the semi-trailer frame and is not easy to pry. When the crowbar is tilted, the crowbar and the bent plate 5 are abutted and drive the bent plate 5 to move, thereby more conveniently driving the mounting plate 2 to slide. The structure is simple and the reliability is strong.

[0030] See also Figure 3 and Figure 4 , the figure illustrates another embodiment of a movable semi-trailer ladder of the utility model. The difference between the two is that the driving member 4 is a hydraulic cylinder connected to the semi-trailer frame at one end and connected to the mounting plate 2 at the other end. Specifically, a first articulated seat is provided on the semi-trailer frame, and a second articulated seat is provided on the mounting plate 2. The two ends of the hydraulic cylinder respectively form an articulated connection with the first articulated seat and the second articulated seat. Adaptively, the bending plate 5 and the through hole are cancelled. At the same time, in order to avoid the limiting structure 3 interfering with the hydraulic cylinder, the limiting hole 31 is close to the middle position of the mounting plate 2, and is opened on one side of the second articulated seat to avoid the limiting pin 32 interfering with the hydraulic cylinder. The mounting plate 2 is driven to slide along the transverse guide rail 1 by the hydraulic cylinder, and the structure is simple and easy to use.

[0031] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is clearly not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A movable semi-trailer ladder, characterized in that: include: A transverse guide rail (1) adapted to be mounted on a semitrailer frame; A mounting plate (2) is slidably connected to the transverse guide rail (1) and is connected to the ladder body; A limiting structure (3) comprising a limiting hole (31) provided on the semi-trailer frame and a limiting pin (32) slidably mounted on the mounting plate (2); a plurality of the limiting holes (31) are arranged side by side along the length direction of the transverse guide rail (1); A driving member (4) is connected to the mounting plate (2) and is configured to drive the mounting plate (2) to slide along the transverse guide rail (1).

2. The movable semi-trailer ladder according to claim 1, characterized in that: The driving member (4) is a crowbar matched with the limiting hole (31), and a through hole matched with the driving member (4) is provided on the mounting plate (2).

3. The movable semi-trailer ladder according to claim 2, characterized in that: A bending plate (5) is arranged on the outside of the mounting plate (2), and a prying hole (52) corresponding to the through hole is provided on the bending plate (5).

4. The movable semi-trailer ladder according to claim 3, characterized in that: A plurality of pry holes (52) are arranged side by side along the length direction of the bent plate (5).

5. The movable semi-trailer ladder according to claim 1, characterized in that: The driving member (4) is a hydraulic cylinder having one end connected to the semi-trailer frame and the other end connected to the mounting plate (2).

6. The movable semi-trailer ladder according to claim 5, characterized in that: A first hinge seat is provided on the semi-trailer frame, and a second hinge seat is provided on the mounting plate (2); both ends of the driving member (4) are respectively connected in hinged cooperation with the first hinge seat and the second hinge seat.

7. A movable semi-trailer ladder according to claim 2 or 5, characterized in that: A positioning hole is provided on the mounting plate (2), and the limiting pin (32) is arranged in the positioning hole.

8. A movable semi-trailer ladder according to claim 2 or 5, characterized in that: The transverse guide rail (1) comprises an upper guide rail (11) and a lower guide rail (12) arranged opposite to each other, and guide grooves matching the mounting plate (2) are provided on both the upper guide rail (11) and the lower guide rail (12).

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