Crawling ladder structure of low flatbed semitrailer

Abstract

The utility model provides a low flatbed semitrailer ladder stand structure, which belongs to the technical field of semitrailer ladder stands and comprises a fixing frame, buffer contraction mechanisms are arranged on two sides of the bottom of the fixing frame, each buffer contraction mechanism comprises a sleeve, a buffer spring, a pressing plate and a piston rod, the sleeves are fixedly mounted at the bottom of the fixing frame, and the buffer springs are arranged on the sleeves. The buffer spring and the pressing plate are arranged in an inner cavity of the sleeve, the piston rod is fixedly connected to one end of the pressing plate, the pressing plate is located at one end of the buffer spring, the piston rod is located at the end, away from the buffer spring, of the pressing plate, and the other end of the piston rod extends out of the sleeve. Through the design of the buffer contraction mechanism, the structure can provide an effective buffer effect when the crawling ladder is transversely contracted, the structural damage caused by impact force is reduced, the telescopic performance of the buffer spring can absorb and release energy, the stability in the contraction process is ensured, and therefore the safety and reliability of the whole structure are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of semi-trailer ladders, and in particular relates to a low-bed semi-trailer ladder structure. Background Art

[0002] With the rapid development of the logistics and transportation industry, low-bed semi-trailers are becoming more and more widely used as an important means of transportation. However, there are many inconveniences and safety hazards in the process of loading and unloading goods, especially for the loading and unloading of heavy machinery and equipment or large goods. Traditional loading and unloading methods usually require the use of tools such as ramps and springboards, which are cumbersome and inefficient to operate. At the same time, there are risks such as cargo sliding and tipping. In order to solve the above problems, the ladder structure of low-bed semi-trailer came into being. The original intention of the design of the ladder structure is to provide a stable and safe passage so that people or goods can easily enter or leave the semi-trailer from the ground.

[0003] In the existing low-bed semi-trailer ladder structure, when the ladder is retracted, due to the lack of protection of the buffer mechanism, any sudden impact force or vibration will directly act on the ladder and its related components. This direct effect can easily lead to structural damage or failure of key components, thereby reducing the overall durability and reliability of the ladder. In addition, due to the lack of effective buffering and stabilization mechanisms, the ladder is likely to become unstable during the retraction process, such as obvious shaking or deviation, which not only greatly reduces the efficiency and accuracy of the operation, but more importantly, may pose a serious safety hazard to personnel who are performing operations or approaching the operating area. Utility Model Content

[0004] The utility model aims to provide a low-bed semi-trailer ladder structure, aiming to solve the problems raised in the above-mentioned background technology.

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

[0006] The cam is secured to the bottom of the frame, and the cam is secured on a inner wall of the frame, wherein the cam is secured on the outer wall of the frame and is in a condition where the cam is pressed downwards and the spring is pressed downwards.

[0007] As a preferred solution of the utility model, both sides of the slide plate are slidably mounted in the inner cavity of the slide groove, and the guide rod passes through the slide plate and extends from both sides thereof.

[0008] As a preferred solution of the utility model, a screw rod is threadedly connected to the middle part of the slide plate, a transmission motor is arranged at one end of the screw rod, and the other end of the screw rod is connected to a fixing frame.

[0009] As a preferred solution of the utility model, mounting grooves are provided on both sides of the fixing frame, the mounting grooves are located below the slide grooves, and auxiliary wheels are provided on the inner side of the fixing frame, the auxiliary wheels are located at the ends of the mounting grooves.

[0010] Compared with the prior art, the beneficial effects of the utility model are: through the design of the buffering and retraction mechanism, the structure can provide an effective buffering effect when the ladder is laterally retracted, reducing structural damage caused by impact force; the telescopic performance of the buffering spring can absorb and release energy, ensuring the smoothness of the retraction process, thereby improving the safety and reliability of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the main body of the ladder of the utility model;

[0014] Figure 3 This is a schematic diagram of the fixing frame structure of the utility model;

[0015] Figure 4 It is a partial structural schematic diagram of the utility model;

[0016] Figure 5 It is a cross-sectional view of the buffer contraction mechanism of the utility model.

[0017] In the figure: 1. fixed frame; 2. buffer retraction mechanism; 201. sleeve; 202. buffer spring; 203. pressure plate; 204. piston rod; 3. slide plate; 4. slide groove; 5. guide rod; 6. screw rod; 7. transmission motor; 8. mounting groove; 9. fixed plate; 10. support; 11. ladder body; 12. anti-sliding block; 13. auxiliary wheel. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example

[0021] Reference Figure 1-5 , is the first embodiment of the utility model, which provides a low-bed semi-trailer ladder structure, including a fixed frame 1, and buffer retraction mechanisms 2 are arranged on both sides of the bottom of the fixed frame 1. The buffer retraction mechanism 2 includes a sleeve 201, a buffer spring 202, a pressure plate 203 and a piston rod 204. The sleeve 201 is fixedly installed at the bottom of the fixed frame 1, the buffer spring 202 and the pressure plate 203 are both arranged in the inner cavity of the sleeve 201, and the piston rod 204 is fixedly connected to one end of the pressure plate 203.

[0022] Specifically, the pressure plate 203 is located at one end of the buffer spring 202, the piston rod 204 is located at the end of the pressure plate 203 away from the buffer spring 202, and the other end of the piston rod 204 extends to the outside of the sleeve 201, and a slide plate 3 is provided at the end of the piston rod 204. Slide grooves 4 are provided on both sides of the fixed frame 1, and guide rods 5 are provided on the inner side of the slide grooves 4. Both sides of the slide plate 3 are slidably installed in the inner cavity of the slide grooves 4. The guide rods 5 penetrate the slide plate 3 and extend from both sides thereof. A screw rod 6 is threadedly connected to the middle part of the slide plate 3, and a transmission motor 7 is provided at one end of the screw rod 6. The other end of the screw rod 6 is connected to the fixed frame 1.

[0023] Furthermore, the fixed frame 1 serves as the foundation and supporting frame of the entire ladder structure, carrying and fixing all other components. The buffer retraction mechanism 2 can provide a buffering effect when the ladder is laterally retracted, reduce structural damage caused by impact force, absorb and release energy through the expansion and contraction of the buffer spring 202, protect the ladder and other components, and ensure the smoothness of the retraction process. The sleeve 201 provides installation space for the buffer spring 202, the pressure plate 203 and the piston rod 204. The buffer spring 202 is compressed when it is under pressure and recovers when the pressure is released, effectively absorbing and releasing energy. The pressure plate 203 and the piston rod 204 convert the expansion and contraction movement of the buffer spring 202 into lateral movement of the slide plate 3, ensuring that the slide plate 3 can slide smoothly in the slide groove 4 to achieve lateral retraction of the ladder. The slide plate 3 slides along the guide rod 5 in the slide groove 4 to ensure the stability and smoothness of the ladder during retraction. The screw rod 6 is driven to rotate by the transmission motor 7 to make the slide plate 3 move laterally along the screw rod 6, thereby improving operational efficiency and safety.

[0024] Specifically, mounting grooves 8 are provided on both sides of the fixing frame 1, and the mounting grooves 8 are located below the slide grooves 4. Auxiliary wheels 13 are provided on the inner side of the fixing frame 1, and the auxiliary wheels 13 are located at the ends of the mounting grooves 8. Fixed plates 9 are provided at the bottoms of both ends of the slide plate 3, and pillars 10 are provided on the inner side of the fixing plates 9. A ladder body 11 is sleeved on the outer side of the pillars 10. The ladder body 11 is provided on the inner side of the mounting grooves 8, and anti-sliding blocks 12 are evenly arranged on the surface of the ladder body 11.

[0025] Furthermore, the mounting groove 8 provides an installation space for the ladder body 11, the auxiliary wheels 13 help the ladder body 11 to move smoothly in the mounting groove 8, the fixing plate 9 and the pillar 10 fix the ladder body 11 on the slide plate 3, and the anti-sliding block 12 increases the friction of the ladder surface to prevent people from slipping when climbing.

[0026] During use, when the ladder needs to be retracted laterally, the transmission motor 7 is started to drive the screw rod 6 to rotate. The rotation of the screw rod 6 will drive the slide plate 3 threadedly connected thereto to perform precise lateral movement in the slide groove 4. At the same time, the guide rod 5 provides stable guidance and support for the slide plate 3 to ensure that it remains stable and smooth during the movement. As the slide plate 3 moves, the ladder body 11 also begins to move laterally through the linkage of the fixed plate 9 and the support 10. Under the precise guidance of the mounting groove 8, the auxiliary wheel 13 is located at the end of the mounting groove 8, which effectively reduces the friction between the ladder body 11 and the mounting groove 8, making the entire movement process smoother and more efficient. In this process, the buffer retraction mechanism 2 plays a key role. When the ladder body 11 moves, the pressure plate 203 moves in the direction of the buffer spring 202, thereby compressing the spring. The buffer spring 202 uses its excellent telescopic performance to effectively absorb and alleviate the impact force and energy from the movement process, and gradually releases this energy when needed, ensuring the safety and stability of the entire retraction process.

[0027] In summary, through the design of the buffering and retraction mechanism 2, the structure can provide an effective buffering effect when the ladder is laterally retracted, reducing structural damage caused by impact force. The telescopic performance of the buffer spring 202 can absorb and release energy to ensure the smoothness of the retraction process, thereby improving the safety and reliability of the entire structure. The design of the auxiliary wheel 13 effectively reduces the friction between the ladder body 11 and the mounting groove 8, making the ladder body 11 smoother and more efficient during movement, which not only reduces energy loss, but also extends the service life of the ladder.

[0028] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0029] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0030] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A low-bed semi-trailer ladder structure, characterized by: The invention comprises a fixing frame (1), wherein both sides of the bottom of the fixing frame (1) are provided with a buffering and retracting mechanism (2), wherein the buffering and retracting mechanism (2) comprises a sleeve (201), a buffering spring (202), a pressure plate (203) and a piston rod (204), wherein the sleeve (201) is fixedly mounted on the bottom of the fixing frame (1), the buffering spring (202) and the pressure plate (203) are both arranged in the inner cavity of the sleeve (201), and the piston rod (204) is fixedly connected to one end of the pressure plate (203), wherein the pressure plate (203) is located at one end of the buffering spring (202), and the piston rod (204) is located at a position away from the buffering spring and the pressure plate (203). The spring (202) is connected to one end of the piston rod (204), and the other end of the piston rod (204) extends to the outside of the sleeve (201). A slide plate (3) is arranged at the end of the piston rod (204). Slide grooves (4) are provided on both sides of the fixing frame (1). A guide rod (5) is provided on the inner side of the slide groove (4). A fixing plate (9) is provided at the bottom of both ends of the slide plate (3). A support (10) is provided on the inner side of the fixing plate (9). A ladder body (11) is sleeved on the outer side of the support (10). The ladder body (11) is arranged on the inner side of the mounting groove (8). Anti-sliding blocks (12) are evenly arranged on the surface of the ladder body (11).

2. The low-bed semi-trailer ladder structure according to claim 1, characterized in that: Both sides of the slide plate (3) are slidably mounted in the inner cavity of the slide groove (4), and the guide rod (5) passes through the slide plate (3) and extends from both sides thereof.

3. The low bed semi-trailer ladder structure according to claim 2, characterized in that: A screw rod (6) is threadedly connected to the middle portion of the slide plate (3); a transmission motor (7) is disposed at one end of the screw rod (6); and the other end of the screw rod (6) is connected to the fixing frame (1).

4. The low bed semi-trailer ladder structure according to claim 3, characterized in that: Both sides of the fixing frame (1) are provided with mounting grooves (8), the mounting grooves (8) are located below the slide grooves (4), and auxiliary wheels (13) are provided on the inner side of the fixing frame (1), the auxiliary wheels (13) are located at the ends of the mounting grooves (8).

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