Protective ladder stand for semitrailer

Abstract

The utility model relates to the technical field of semitrailers, in particular to a protective ladder stand for a semitrailer, which comprises a mounting seat, two swing arms are symmetrically hinged to the top of the mounting seat, and a plurality of pedals are uniformly distributed between the two swing arms; gas springs are arranged on the outer sides of the swing arms, push rods of the gas springs are hinged to the swing arms, cylinder bodies of the gas springs are hinged to stand columns, and the stand columns are fixedly arranged at the top of the mounting base; when the swing arm is downwards and obliquely lapped on the mounting seat from a vertical state, the pedals are in a horizontal state and are distributed in a stair shape, so that workers can safely get on and off the vehicle body; meanwhile, a certain guardrail protection effect is achieved on the whole.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-trailers, in particular to a protective ladder used for semi-trailers. Background Art

[0002] like Figure 1 As shown, a gooseneck semi-trailer used in existing workshops is used to load and transport oil-related equipment. Guardrails are provided on the vehicle body and the gooseneck at the head of the vehicle body. There is a gap between the vehicle body and the gooseneck, and workers get on and off the vehicle body through the gap. Due to the high height of the vehicle body, it is extremely inconvenient for workers to get on and off the vehicle body, and there are certain safety risks.

[0003] Therefore, it is urgent to design a ladder that can play a protective role of the guardrail and is convenient for workers to get on and off the vehicle body. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects and shortcomings in the prior art. To this end, the utility model provides a protective ladder for a semi-trailer, which can be easily opened and retracted, helps workers climb onto the vehicle body, and at the same time, also plays a certain guardrail protection role.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a protective ladder for a semi-trailer, including a mounting seat, the top of which is symmetrically and hingedly provided with two swing arms, and a plurality of pedals are evenly distributed between the two swing arms; a gas spring is provided on the outer side of the swing arm, a push rod of the gas spring is hinged to the swing arm, a cylinder of the gas spring is hinged to a column, and the column is fixed on the top of the mounting seat; the swing arm is configured so that when it is tilted downward from a vertical state and placed on the mounting seat, a plurality of the pedals are in a horizontal state and are distributed in a staircase shape.

[0006] Furthermore, the swing arm includes a lower crank A and an upper crank B which are parallel to each other and hinged on a fixed plate, and a plurality of connecting plates are evenly hinged between the inner sides of the lower crank A and the upper crank B, and the fixed plate, the lower crank A, the upper crank B and the connecting plates constitute a regular parallelogram mechanism; the pedal is horizontally fixed between the corresponding two connecting plates; the fixed plate and the mounting seat are integrally arranged; the push rod of the gas spring is hinged to the lower crank A.

[0007] Furthermore, the upper crank B is provided with a limiting column at one end away from the mounting seat; the limiting column is configured so that when it is placed on the lower crank A, the lower crank A is tilted and placed on the fixing plate.

[0008] Furthermore, two connecting columns are provided on the outer side of the connecting plate, and the two connecting columns are hinged to the corresponding lower crank A and upper crank B.

[0009] Furthermore, a handle is provided on the outer side of the lower crank A.

[0010] Furthermore, a downwardly inclined limiting plate is provided on the outer side of the fixing plate, and the lower crank A can be placed parallel to the limiting plate.

[0011] Furthermore, the angle between the limiting plate and the vertical direction is 45°±1°.

[0012] Furthermore, a lug plate is provided on the top of the column.

[0013] Furthermore, the lower crank A is on the same straight line as the hinge points of the fixing plate, the connecting plate and the gas spring.

[0014] Furthermore, the cross section of the mounting seat is a right angle.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the swing arm is supported by a gas spring, so that the swing arm can be stably switched between a vertical state and an inclined state. When the swing arm is in a vertical state, the whole body plays a certain role of guardrail protection; when the swing arm is in an inclined state, several pedals are in a horizontal state and distributed in a staircase shape, which is convenient for workers to get on and off the vehicle safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an existing gooseneck semi-trailer.

[0017] Figure 2 It is a structural schematic diagram of the utility model.

[0018] Figure 3 It is the front view of the utility model in the vertical state.

[0019] Figure 4 for Figure 3 Left view of .

[0020] Figure 5 for Figure 4 Position diagram of the middle swing arm when it is tilted.

[0021] Figure 6 It is a schematic diagram of the installation position of the utility model.

[0022] Among them: 1. mounting base; 2. column; 3. gas spring; 4. lower crank A; 5. upper crank B; 6. pedal; 11. fixing plate; 12. limiting plate; 21. ear plate; 41. handle; 51. limiting column; 61. connecting plate; 62. connecting column. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. Example

[0025] See also Figures 2 to 6 The utility model provides a protective ladder for a semi-trailer, including a mounting seat 1, the top of the mounting seat 1 is symmetrically and hingedly provided with two swing arms, and a plurality of pedals 6 are evenly distributed between the two swing arms; a gas spring 3 is provided on the outer side of the swing arm, a push rod of the gas spring 3 is hinged to the swing arm, a cylinder of the gas spring 3 is hinged to a column 2, and the column 2 is fixedly arranged on the top of the mounting seat 1.

[0026] The two swing arms are supported by gas springs 3 so that the swing arms can be switched between a vertical state and an inclined state. When the swing arms are tilted downward and placed on the mounting base 1, the plurality of pedals 6 are in a horizontal state and are distributed in a staircase shape, so that workers can climb onto the vehicle body and ensure the safety of workers getting on and off the vehicle body.

[0027] Here, the top of the column 2 may be provided with an ear plate 21 to facilitate overall transportation, or a rope may be sleeved on the two ear plates 21 to wrap around the two swing arms to prevent the swing arms from shaking violently and opening during the bumpy process.

[0028] The cross section of the mounting seat 1 is preferably a right angle, so as to facilitate the overall bolting and fixing to the vehicle body.

[0029] As an embodiment of the utility model, the swing arm includes a lower crank A4 and an upper crank B5 which are parallel to each other and hinged on the fixed plate 11, and a plurality of connecting plates 61 are evenly hinged between the inner sides of the lower crank A4 and the upper crank B5. The fixed plate 11, the lower crank A4, the upper crank B5 and the connecting plate 61 constitute a regular parallelogram mechanism, and the pedal 6 is horizontally fixed between the corresponding two connecting plates 61; the fixed plate 11 is integrally arranged with the mounting seat 1; the push rod of the gas spring 3 is hinged to the lower crank A4.

[0030] By adopting the regular parallelogram mechanism, the pedal 6 is always in a horizontal state. When not in use, the swing arm is in a vertical state, and the column 2, the swing arm and the pedal 6 play a certain guardrail protection role.

[0031] As an embodiment of the utility model, the upper crank B5 is provided with a limiting column 51 at one end away from the mounting seat 1; when the lower crank A4 is tilted and placed on the fixing plate 11, the limiting column 51 is placed on the lower crank A4.

[0032] Specifically, a downwardly inclined limiting plate 12 is provided on the outer side of the fixing plate 11, and the lower crank A4 can be placed parallel to the limiting plate 12 to enhance the overall stability.

[0033] The angle between the limiting plate 12 and the vertical direction is preferably 45°±1°.

[0034] In addition, two connecting columns 62 may be provided on the outer side of the connecting plate 61, and the two connecting columns 62 are hinged to the corresponding lower crank A4 and upper crank B5. Accordingly, the connecting line of the two connecting columns 62 is parallel to the connecting line of the hinge points of the lower crank A4, upper crank B5 and the mounting seat 1, and the details are not repeated.

[0035] The lower crank A4 may be provided with a handle 41 on its outer side to facilitate workers to operate the ladder. The hinge points of the lower crank A4, the fixing plate 11, the connecting plate 61 and the gas spring 3 are preferably on the same straight line.

[0036] like Figure 6 As shown, the utility model is installed in the gap position on both sides of the vehicle body, which plays a certain role of guardrail protection and is convenient for workers to operate. When unloading is required, the whole can be quickly transported through the ear plate 21, and the specific details are not repeated.

[0037] The utility model can be summarized in other specific forms that do not violate the spirit or main features of the utility model. Therefore, no matter from which point of view, the above embodiments of the utility model can only be regarded as an explanation of the utility model and cannot limit the utility model. The claims indicate the scope of the utility model, while the above description does not indicate the scope of the utility model. Therefore, any changes within the meaning and scope equivalent to the claims of the utility model should be considered to be included in the scope of the claims of the utility model.

Claims

1. A protective ladder for a semi-trailer, characterized in that: The invention comprises a mounting seat (1), the top of which is symmetrically and hingedly provided with two swing arms, a plurality of pedals (6) being evenly distributed between the two swing arms; a gas spring (3) is provided on the outer side of the swing arm, a push rod of the gas spring (3) being hingedly connected to the swing arm, a cylinder of the gas spring (3) being hingedly connected to a column (2), and the column (2) being fixedly arranged on the top of the mounting seat (1); the swing arm is configured such that when it is tilted downward from a vertical state and placed on the mounting seat (1), the plurality of pedals (6) are in a horizontal state and are distributed in a staircase shape.

2. The protective ladder for a semitrailer according to claim 1, characterized in that: The swing arm comprises a lower crank A (4) and an upper crank B (5) which are parallel to each other and hinged on a fixed plate (11); a plurality of connecting plates (61) are evenly hinged between the inner sides of the lower crank A (4) and the upper crank B (5); the fixed plate (11), the lower crank A (4), the upper crank B (5) and the connecting plates (61) form a regular parallelogram mechanism; the pedal (6) is horizontally fixed between two corresponding connecting plates (61); the fixed plate (11) and the mounting seat (1) are integrally arranged; and the push rod of the gas spring (3) is hinged to the lower crank A (4).

3. The protective ladder for a semitrailer according to claim 2, characterized in that: The upper crank B (5) is provided with a limiting column (51) at one end away from the mounting seat (1); the limiting column (51) is configured such that when it is placed on the lower crank A (4), the lower crank A (4) is tilted and placed on the fixing plate (11).

4. The protective ladder for a semitrailer according to claim 3, characterized in that: Two connecting columns (62) are provided on the outer side of the connecting plate (61), and the two connecting columns (62) are hingedly connected to the corresponding lower crank A (4) and upper crank B (5).

5. The protective ladder for a semitrailer according to claim 3, characterized in that: A handle (41) is provided on the outer side of the lower crank A (4).

6. The protective ladder for a semitrailer according to claim 5, characterized in that: A downwardly inclined limiting plate (12) is provided on the outer side of the fixing plate (11), and the lower crank A (4) can be placed parallel to the limiting plate (12).

7. The protective ladder for a semitrailer according to claim 6, characterized in that: The angle between the limiting plate (12) and the vertical direction is 45°±1°.

8. The protective ladder for a semitrailer according to claim 5 or 7, characterized in that: A lug plate (21) is provided on the top of the column (2).

9. The protective ladder for a semitrailer according to claim 8, characterized in that: The lower crank A (4) is located on the same straight line as the hinge points of the fixing plate (11), the connecting plate (61) and the gas spring (3).

10. The protective ladder for a semitrailer according to claim 1, characterized in that: The cross section of the mounting seat (1) is a right angle.

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