Semitrailer ladder stand convenient to replace and maintain

Abstract

The semitrailer ladder stand convenient to replace and maintain comprises a frame and a ladder stand frame, the ladder stand frame is installed on an installation base, the installation base is detachably connected with the frame, two upper turnover shafts and two lower turnover shafts are arranged on the side, close to the ladder stand frame, of the installation base, the ladder stand frame is rotationally connected with the upper turnover shafts, and the lower turnover shafts are rotationally connected with the installation base. A first hydraulic rod is arranged below the ladder stand frame, the output end of the first hydraulic rod is rotationally connected to the bottom face of the ladder stand frame, and the bottom end of the first hydraulic rod is rotationally connected with the lower overturning shaft. According to the utility model, the oil consumption of the semitrailer during transportation of equipment needing to be hoisted is reduced, the cost is saved, the maintenance of the crawling ladder is facilitated, the maintenance efficiency is improved, and the situation that the semitrailer cannot be used during the maintenance of the crawling ladder frame is avoided.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer ladder technology, specifically to a semi-trailer ladder that is easy to replace and maintain. Background Technology

[0002] Flatbed semi-trailers are typically used to transport automobiles, rail vehicles, large machinery, industrial equipment, and construction machinery. The lower the center of gravity, the better the safety during transportation. When using flatbed semi-trailers, construction vehicles are large in size and weight, and ladders are needed to assist in loading and unloading.

[0003] When using existing flatbed semi-trailer ladders, if the transported equipment has autonomous movement mechanisms such as tires or tracks, the ladder is usually lowered from the low flatbed semi-trailer, and the construction vehicle is transported onto the low flatbed semi-trailer via the ladder. If the equipment does not have autonomous movement, it is usually placed on the semi-trailer using a hoisting method. During hoisting loading and unloading, the ladder becomes ineffective. Since most existing ladders cannot be easily removed and must remain on the semi-trailer, the ladder not only fails to assist in loading and unloading but also increases the weight of the semi-trailer, increasing fuel consumption. Furthermore, the constant vibration and bumps during transport also shorten the lifespan of the ladder. Additionally, when maintenance is needed on the ladder, the semi-trailer must be parked at a repair shop, impacting both the use of the semi-trailer and the efficiency of ladder maintenance. Utility Model Content

[0004] This utility model provides a semi-trailer ladder that is easy to replace and maintain, in order to solve the technical problems mentioned in the background art.

[0005] This utility model provides a semi-trailer ladder that is easy to replace and maintain, including a frame and a ladder frame. The ladder frame is mounted on a mounting base, which is detachably connected to the frame. The mounting base is provided with two upper tilting shafts and two lower tilting shafts on the side near the ladder frame. The ladder frame is rotatably connected to the upper tilting shafts. A first hydraulic rod is provided below the ladder frame. The output end of the first hydraulic rod is rotatably connected to the bottom surface of the ladder frame, and the bottom end of the first hydraulic rod is rotatably connected to the lower tilting shafts.

[0006] Furthermore, a plug is fixed to the side of the mounting base away from the ladder frame. The lower surface of the plug has multiple slots. A slot seat is fixed to the end of the frame. The slot seat has a slot that mates with the plug on the side near the plug. The bottom surface of the slot has multiple holes that match the position and number of the slots. A block slides up and down in the holes. A spring groove is provided below the holes. A spring is installed in the spring groove. One end of the spring abuts against the bottom surface of the spring groove, and the other end abuts against the lower end face of the block. The upper part of the block is set as an inclined surface on the side near the ladder frame. The plug has a surface that mates with the inclined surface.

[0007] Furthermore, a guide post is fixedly connected to the bottom surface of the card block, and a guide hole that mates with the guide post is provided below the spring groove. The guide post passes through the spring and exits the slot seat.

[0008] Furthermore, the lower ends of the guide columns are all connected to the top plate, and extensions are provided on both sides of the top plate. A second hydraulic rod is provided above each extension. When the second hydraulic rod is working, its output end can abut against the extension. The second hydraulic rod is fixedly connected to the vehicle frame.

[0009] Furthermore, a tire mounting frame is fixed to the upper part of the ladder frame, and a buffer tire is installed on the tire mounting frame;

[0010] Furthermore, the lower part of the ladder frame is foldable and fixed with a caster wheel mounting bracket, and at least two casters are mounted on the caster wheel mounting bracket.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention, through the inclusion of insert blocks, slots, grooves, locking blocks, springs, a top plate, and a second hydraulic rod, allows for quick assembly and disassembly of the ladder frame and the vehicle frame. The insert blocks are inserted into the slots, and the locking blocks engage with the grooves to assemble the ladder frame and the vehicle frame. The second hydraulic rod operates by moving its output end downwards, abutting against the extension of the top plate and continuing downwards to drive the top plate downwards. The top plate then drives the locking blocks downwards until they are pushed out of the grooves, allowing the ladder frame and vehicle frame to be separated. A buffer tire is included, utilizing the air inside to provide cushioning. A foldable universal wheel mounting bracket and universal wheels, in conjunction with the buffer tire, facilitate the movement of the ladder frame after it is separated from the vehicle frame.

[0013] This invention reduces fuel consumption of semi-trailers when transporting equipment requiring lifting, saves costs, facilitates ladder maintenance, improves maintenance efficiency, and avoids situations where semi-trailers cannot be used when ladder frames are being repaired. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a semi-trailer ladder structure that is easy to replace and maintain, provided by this utility model;

[0016] Figure 2This is a side view of the structure of a semi-trailer ladder slot seat and mounting seat that are convenient for replacement and maintenance, provided by this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of a semi-trailer ladder slot seat that is easy to replace and maintain, provided by this utility model.

[0018] In the diagram: 1. Frame, 2. Ladder frame, 21. Tire mounting bracket, 22. Cushion tire, 23. Caster wheel mounting bracket, 24. Caster wheel, 3. Mounting base, 31. Insert block, 32. Slot, 33. Insert block, 34. Slot, 4. First hydraulic rod, 5. Slot seat, 51. Slot, 52. Pull hole, 53. Locking block, 54. Spring, 55. Guide column, 56. Top plate, 6. Second hydraulic rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to the present utility model are shown in the drawings, not all of the structures. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Please refer to Figures 1-3 A semi-trailer ladder that is easy to replace and maintain includes a frame 1 and a ladder frame 2. The ladder frame 2 is mounted on a mounting base 3, which is detachably connected to the frame 1. The mounting base 3 has two upper tilting shafts and two lower tilting shafts on the side near the ladder frame 2. The ladder frame 2 is rotatably connected to the upper tilting shafts. A first hydraulic rod 4 is provided below the ladder frame 2. The output end of the first hydraulic rod 4 is rotatably connected to the bottom surface of the ladder frame 2. The bottom end of the first hydraulic rod 4 is rotatably connected to the lower tilting shafts. The connection is roughly the same as that of existing hydraulic rod driven ladders, except that the ladder in this solution is detachably connected to the frame 1.

[0022] Specifically, a plug 31 is fixed to the side of the mounting base 3 away from the ladder frame 2. Multiple slots 32 are formed on the lower surface of the plug 31. A slot seat 5 is fixed to the end of the frame 1. A slot 51 that mates with the plug 31 is formed on the side of the slot seat 5 near the plug 31. Multiple locking holes 52, matching the position and number of the slots 32, are provided on the bottom surface of the slot 51. A locking block 53 slides vertically within each locking hole 52. A spring groove is provided below the locking hole 52, and a locking block 53 is installed within the spring groove. A spring is provided, with one end of the spring abutting against the bottom surface of the spring groove and the other end abutting against the lower end surface of the locking block 53. The upper part of the locking block 53 near the ladder frame 2 is set as an inclined surface. The insert block 31 is provided with a surface that cooperates with the inclined surface. In use, the insert block 31 is moved into the slot 51, and the insert block 31 contacts the locking block 53. It continues to move into the slot 51. The locking block 53 presses down and the spring is compressed. When the locking block 53 enters the locking hole 52, the locking block 53 moves upward under the action of the spring, the insert block 31 stops moving, and the ladder frame 2 stops moving.

[0023] Preferably, a guide post 55 is fixedly connected to the bottom surface of the card block 53, and a guide hole that cooperates with the guide post 55 is provided below the spring groove. The guide post 55 passes through the spring and exits the slot seat 5.

[0024] Preferably, the lower ends of the guide columns 55 are all connected to the top plate 56. The top plate 56 has extensions on both sides, and a second hydraulic rod 6 is provided above each extension. When the second hydraulic rod 6 is working, its output end can abut against the extension. The second hydraulic rod 6 is fixedly connected to the frame 1. When it is necessary to disassemble the ladder frame 2, the second hydraulic rod 6 is activated, the piston rod of the second hydraulic rod 6 moves down and then abuts against the extension of the top plate 56. The piston rod of the second hydraulic rod 6 continues to move down, and the top plate 56 moves down under the action of the second hydraulic rod 6. The top plate 56 drives the guide columns 55 to move down, and the guide columns 55 drive the locking block 53 to move down. The locking block 53 moves down and the spring is compressed. When the locking block 53 is inserted into the locking hole 52, it pulls the ladder frame 2 and the mounting base 3 outward, so that the insertion block 31 is disengaged from the slot 51, and the disassembly of the ladder frame 2 is completed.

[0025] Preferably, a tire mounting bracket 21 is fixed to the upper part of the climbing frame 2, and a buffer tire 22 is mounted on the tire mounting bracket 21. When the climbing frame 2 is in the working position, the buffer tire 22 is in contact with the ground. At this time, the buffer tire 22 can be lower than the lower end of the climbing frame 2, that is, the climbing frame 2 can be slightly off the ground or lightly touch the ground. The air in the buffer tire 22 plays a buffering role. In actual use, a buffer fork can be used to mount the buffer tire 22 to enhance the buffering and shock absorption effect.

[0026] Preferably, the lower part of the ladder frame 2 is foldably fixed with a caster wheel mounting bracket 23, and at least two caster wheels 24 are installed on the caster wheel mounting bracket 23. The main purpose of setting the caster wheels 24 is that when the ladder frame 2 is installed and disassembled, after the caster wheel mounting bracket 23 is opened, the caster wheels 24 can cooperate with the buffer tires 22 to facilitate the movement of the ladder frame 2.

[0027] Working principle: When the ladder frame 2 is needed, the first hydraulic rod 4 is in the lowered position, the buffer tire 22 is in contact with the ground, the universal wheel mounting bracket 23 is open, and the universal wheels 24 are in contact with the ground. The operator pushes the ladder frame 2, causing the insert block 31 to move into the slot 51. The insert block 31 contacts the locking block 53 and continues to move into the slot 51. The locking block 53 compresses the spring. When the locking block 53 enters the locking hole 52, the locking block 53 moves upward under the action of the spring, the insert block 31 stops moving, and the ladder frame 2 stops moving. Then the universal wheel mounting bracket 23 is folded, and the ladder frame 2 can be used normally. When the equipment loaded on the semi-trailer does not need to be used... When the ladder frame 2 or the ladder frame 2 needs inspection and maintenance, the first hydraulic rod 4 is activated, lowering the ladder frame 2 to the working position. The universal wheel mounting bracket 23 is opened, and the second hydraulic rod 6 is activated. The piston rod of the second hydraulic rod 6 moves down and then abuts against the extension of the top plate 56. The piston rod of the second hydraulic rod 6 continues to move down, and the top plate 56 moves down under the action of the second hydraulic rod 6. The top plate 56 drives the guide column 55 to move down, and the guide column 55 drives the locking block 53 to move down. The locking block 53 moves down and the spring is compressed. When the locking block 53 is inserted into the locking hole 52, the ladder frame 2 and the mounting base 3 are pulled outward, so that the insertion block 31 is disengaged from the slot 51, completing the disassembly of the ladder frame 2.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A semi-trailer ladder that is easy to replace and maintain, comprising a frame and a ladder frame, characterized in that, The ladder frame is mounted on a mounting base, which is detachably connected to the vehicle frame. The mounting base has two upper tilting shafts and two lower tilting shafts on the side near the ladder frame. The ladder frame is rotatably connected to the upper tilting shafts. A first hydraulic rod is provided below the ladder frame. The output end of the first hydraulic rod is rotatably connected to the bottom surface of the ladder frame, and the bottom end of the first hydraulic rod is rotatably connected to the lower tilting shafts.

2. The semi-trailer ladder for easy replacement and maintenance according to claim 1, characterized in that, A plug is fixed to the side of the mounting base away from the ladder frame. The lower surface of the plug has multiple slots. A slot seat is fixed to the end of the frame. The slot seat has a slot that mates with the plug on the side near the plug. The bottom surface of the slot has multiple holes that match the position and number of the slots. A block slides up and down in the holes. A spring groove is provided below the holes. A spring is installed in the spring groove. One end of the spring abuts against the bottom surface of the spring groove, and the other end abuts against the lower end face of the block. The upper part of the block is set as an inclined surface on the side near the ladder frame. The plug has a surface that mates with the inclined surface.

3. A semi-trailer ladder that is easy to replace and maintain according to claim 2, characterized in that, A guide post is fixedly connected to the bottom surface of the card block, and a guide hole that mates with the guide post is provided below the spring groove. The guide post passes through the spring and exits the slot seat.

4. A semi-trailer ladder that is easy to replace and maintain according to claim 3, characterized in that, The lower ends of the guide columns are all connected to the top plate. The top plate has extensions on both sides. A second hydraulic rod is provided above each extension. When the second hydraulic rod is working, its output end can abut against the extension. The second hydraulic rod is fixedly connected to the frame.

5. A semi-trailer ladder that is easy to replace and maintain according to claim 1, characterized in that, A tire mounting frame is fixed to the upper part of the ladder frame, and a buffer tire is installed on the tire mounting frame.

6. A semi-trailer ladder that is easy to replace and maintain according to claim 5, characterized in that, The lower part of the ladder frame is foldable and fixed with a caster wheel mounting bracket, and at least two casters are installed on the caster wheel mounting bracket.

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