A laterally retracting concealed stairway for a cargo van truck

Abstract

The utility model discloses a kind of laterally pull hidden ladder stand for cargo warehouse grid car, it is related to vehicle auxiliary equipment technical field, including ladder stand body and pull mechanism;Ladder stand body includes two parallelly arranged vertical support, and the transverse tread bar of several roots fixedly connected between two vertical supports;Pull mechanism includes connecting seat and outer sleeve, outer sleeve is fixedly connected on the side portion of connecting seat, connecting seat is fixedly installed on the outer side of cargo warehouse grid car compartment front side plate, and the installation direction of connecting seat is perpendicular to vehicle driving direction;Outer sleeve and the transverse tread bar of ladder stand body sliding fit, ladder stand body is slidably connected with outer sleeve, can move left and right along horizontal direction, realize the pull-out unfolding or push-in hiding of ladder stand body;The ladder stand of the utility model is arranged perpendicular to vehicle driving direction by arrangement mode and pull structure, realizes the effect of being pulled out when using, hidden storage when not using, does not occupy external space.

Description

Technical Field

[0001] This utility model relates to the field of vehicle auxiliary equipment technology, specifically to a side-pull-out concealed ladder for a cargo box truck. Background Technology

[0002] Existing cargo wagons typically have fixed ladders at the front of the cargo box and on both sides of the cab to allow drivers and staff to climb to the top of the cargo box for tasks such as covering with tarpaulins, securing cargo, and inspection. These traditional ladders are generally welded directly to the cargo box pillars using connecting pipes and steel plates, with their structural arrangement parallel to the vehicle's direction of travel. However, this traditional structure has the following significant drawbacks: 1. Space encroachment issue: The fixed ladder protrudes from the outside of the carriage, encroaching on the limited road space and posing a risk of scratches when driving on narrow roads or passing other vehicles; 2. Interference with wide-body cabs: As the logistics industry demands increased driver comfort, wide-body cabs with flat fronts have become the mainstream trend. During operation, especially on bumpy roads, these cabs tend to sway from side to side. Because the existing ladders are rigidly fixed and parallel to both sides of the cab, this swaying can easily interfere with and collide with the ladders, causing damage to the cab side panels, lights, and other components, increasing vehicle maintenance costs and safety hazards. 3. Limited functionality: The structure is fixed and cannot be adjusted according to the usage scenario, resulting in poor flexibility. Utility Model Content

[0003] The purpose of this utility model is to provide a side-pull-out concealed ladder for cargo box trucks. The ladder, through its arrangement perpendicular to the vehicle's direction of travel and its pull-out structure, achieves the effect of being pulled out when in use and hidden away when not in use. It does not occupy external space, avoids interference with the movement of the wide-body cab, and ensures stability and reliability during use.

[0004] This utility model includes a ladder body and a pull-out mechanism; the ladder body includes two parallel vertical support members and several horizontal steps fixedly connected between the two vertical support members; the pull-out mechanism includes a connecting seat and an outer sleeve, the outer sleeve is fixedly connected to the side of the connecting seat, the connecting seat is fixedly installed on the outer side of the front side panel of the cargo box truck, and the installation direction of the connecting seat is perpendicular to the vehicle's driving direction; the outer sleeve slides with the horizontal steps of the ladder body, and the ladder body can move left and right in the horizontal direction through the sliding connection with the outer sleeve, realizing the pull-out or push-in concealment of the ladder body.

[0005] Preferably, the outer sleeve is fitted over the outside of the horizontal treads of the ladder body, and the inner hole contour of the outer sleeve is adapted to the shape of the horizontal treads. The ladder body moves horizontally by sliding the horizontal treads inside the outer sleeve.

[0006] Preferably, the outer sleeve has a first positioning hole that penetrates its upper and lower ends, and the transverse step has a second positioning hole at the position corresponding to the first positioning hole. After the first positioning hole and the second positioning hole are aligned, a positioning component can be detachably installed inside to lock the pull-out or push-in state of the ladder body.

[0007] Preferably, each horizontal step has at least two second positioning holes, which are distributed along the length of the horizontal step at the left and right ends of the horizontal step, respectively corresponding to the hidden locking position and the unfolded locking position of the ladder body.

[0008] Preferably, the positioning element is a quick-release D-pin, the outer diameter of which is adapted to the inner diameter of the first positioning hole and the second positioning hole to achieve quick insertion and removal positioning.

[0009] Preferably, the outer sleeve and the transverse pedal are in clearance fit, and the clearance size is 0.5mm-1.5mm.

[0010] Preferably, the connecting seat is a plate-shaped structure, and its connection with the front side panel of the carriage is a bolt fastening connection. The connecting seat has at least two mounting holes.

[0011] In summary, this utility model has the following beneficial effects: 1. By changing the direction of the ladder from parallel to the direction of vehicle travel to perpendicular to the direction of vehicle travel, and hiding it between the rear of the cab and the front side panel of the cargo box, the problem of collision between the ladder and the left and right swaying of the wide-body cab during operation is solved, effectively protecting the cab and reducing maintenance costs. 2. When folded up, the ladder does not protrude from the outside of the vehicle compartment, which complies with the vehicle's external dimensions regulations, reduces the space occupied during driving and parking, and improves the vehicle's passability and safety; the hidden design makes the side lines of the vehicle simpler and smoother, enhancing the overall aesthetics of the vehicle. 3. The ladder body is fixed by a pull-out structure and quick-connect D-pins, allowing one person to quickly unfold and fold the ladder, greatly improving work efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the installation of a side-pull-out concealed ladder for a cargo wagon according to the present invention. Figure 2 A close-up view of the area where the pull-out mechanism is installed on the main body of the ladder; Figure 3 This is a schematic diagram of the pull-out mechanism.

[0013] In the diagram: 1. Ladder body; 11. Vertical support; 12. Horizontal step; 121. Second positioning hole; 2. Pull-out mechanism; 21. Connecting seat; 211. Mounting hole; 22. Outer sleeve; 221. First positioning hole; 3. Positioning component; 4. Front side panel of the carriage. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] The orientations mentioned in this specification refer to the orientation of the side-pull-out concealed ladder for cargo storage vehicles during normal operation. They do not limit the orientation during storage and transportation, but only represent relative positional relationships, not absolute positional relationships.

[0016] like Figures 1 to 3 As shown, a side-pull-out concealed ladder for a cargo wagon includes a ladder body 1 and a pull-out mechanism 2. The ladder body 1 includes two parallel vertical support members 11 and several horizontal steps 12 fixedly connected between the two vertical support members 11. In this embodiment, both the vertical support members 11 and the horizontal steps 12 are made of high-strength steel pipes, which have high load-bearing capacity and deformation resistance, and can meet the needs of workers getting on and off the wagon. The number of horizontal steps 12 is set according to the height of the wagon, generally 7-8, and the spacing between adjacent horizontal steps 12 is 300mm-400mm to facilitate workers' stepping.

[0017] The pull-out mechanism 2 includes a connecting seat 21 and an outer sleeve 22. The outer sleeve 22 is fixedly connected to the side of the connecting seat 21. In this embodiment, the outer sleeve 22 and the connecting seat 21 are fixedly connected by welding, and the connection is firm and reliable. The connecting seat 21 is a plate-shaped structure, and its connection with the front side panel 4 of the cargo box is a bolt fastening connection. The connecting seat 21 has two mounting holes 211. The connecting seat 21 is fixedly installed on the outer side of the front side panel 4 of the cargo box truck by bolts passing through the mounting holes 211, and the installation direction of the connecting seat 21 is perpendicular to the vehicle's driving direction.

[0018] The outer sleeve 22 is fitted onto the outside of the transverse steps 12 of the ladder body 1, and the inner contour of the outer sleeve 22 matches the shape of the transverse steps 12. In this embodiment, the pull-out mechanism 2 has no fewer than two sets, distributed at the uppermost and lowermost transverse steps 12 of the ladder body 1. The transverse steps 12 are circular steel pipes, and the inner hole of the outer sleeve 22 is a circular hole, with their dimensions matching. The outer sleeve 22 and the transverse steps 12 are in clearance fit, with a clearance size between 0.5mm and 1.5mm. This ensures the smooth sliding of the ladder body 1 while preventing excessive wobbling of the ladder body 1 during sliding due to excessive clearance. The ladder body 1 can move left and right in the horizontal direction by sliding the transverse steps 12 within the outer sleeve 22, realizing the pull-out or push-in concealment of the ladder body 1.

[0019] The outer sleeve 22 has a first positioning hole 221 penetrating its upper and lower end faces. The transverse step 12 has a second positioning hole 121 corresponding to the first positioning hole 221. Each transverse step 12 equipped with the pull-out mechanism 2 has two second positioning holes 121, which are distributed along the length of the transverse step 12 at the left and right ends of the transverse step 12, respectively corresponding to the hidden locking position and the unfolded locking position of the ladder body 1. After the first positioning hole 221 and the second positioning hole 121 are aligned, a positioning component 3 can be detachably installed inside. The positioning component 3 is a quick-release D-pin. The outer diameter of the quick-release D-pin is adapted to the inner diameter of the first positioning hole 221 and the second positioning hole 121 to achieve quick insertion and removal positioning.

[0020] The working principle of this utility model is as follows: When the ladder is needed, the worker pulls out the positioning piece 3 from the first positioning hole 221 and the second positioning hole 121, and then pulls the ladder body 1 outward in the horizontal direction. When the ladder body 1 is fully unfolded, the second positioning hole 121 on the outer side of the horizontal step 12 is aligned with the first positioning hole 221 on the outer sleeve 22. At this time, the positioning piece 3 is inserted into the first positioning hole 221 and the second positioning hole 121, which locks the ladder body 1 in the unfolded state. The worker can then climb up and down the carriage using the ladder. When the ladder is not needed, the worker pulls out the positioning piece 3 and pushes the ladder body 1 inward in the horizontal direction. When the ladder body 1 is completely hidden, the second positioning hole 121 on the inner side of the horizontal step 12 is aligned with the first positioning hole 221 on the outer sleeve 22. The positioning piece 3 is then inserted, which locks the ladder body 1 in the hidden state.

[0021] In summary, the side-pull-out concealed ladder of the cargo wagon provided by this utility model can be opened and closed side by side, which is convenient and quick to use. When not in use, it can be hidden and stored, reducing space occupation and safety hazards, and has high practical value.

[0022] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A side-pull-out concealed ladder for a cargo wagon, characterized in that: The system includes a ladder body and a pull-out mechanism. The ladder body includes two parallel vertical support members and several horizontal steps fixedly connected between the two vertical support members. The pull-out mechanism includes a connecting seat and an outer sleeve. The outer sleeve is fixedly connected to the side of the connecting seat, which is fixedly installed on the outer side of the front side panel of the cargo box truck, and the installation direction of the connecting seat is perpendicular to the vehicle's driving direction. The outer sleeve slides with the horizontal steps of the ladder body, and the ladder body can move left and right in the horizontal direction through the sliding connection with the outer sleeve, realizing the extension or retraction of the ladder body.

2. The side-pull-out concealed ladder for a cargo wagon as described in claim 1, characterized in that: The outer sleeve is fitted over the outside of the horizontal step of the ladder body, and the inner hole contour of the outer sleeve is adapted to the shape of the horizontal step. The ladder body moves horizontally by sliding the horizontal step inside the outer sleeve.

3. A side-pull-out concealed ladder for a cargo wagon as described in claim 2, characterized in that: The outer sleeve has a first positioning hole that penetrates its upper and lower ends. The horizontal step has a second positioning hole corresponding to the position of the first positioning hole. After the first positioning hole and the second positioning hole are aligned, a positioning component can be detachably installed inside to lock the pull-out or push-in state of the ladder body.

4. A side-pull-out concealed ladder for a cargo wagon as described in claim 3, characterized in that: Each of the horizontal steps has at least two second positioning holes, which are distributed along the length of the horizontal step at the left and right ends of the horizontal step, respectively corresponding to the hidden locking position and the unfolded locking position of the ladder body.

5. A side-pull-out concealed ladder for a cargo wagon as described in claim 3, characterized in that: The positioning component is a quick-release D-pin, the outer diameter of which is adapted to the inner diameter of the first positioning hole and the second positioning hole to achieve quick insertion and removal positioning.

6. A side-pull-out concealed ladder for a cargo wagon as described in claim 1, characterized in that: The outer sleeve and the transverse step are fitted with a clearance, and the clearance size is 0.5mm-1.5mm.

7. A side-pull-out concealed ladder for a cargo wagon as described in claim 1, characterized in that: The connecting seat is a plate-shaped structure, and its connection with the front side panel of the carriage is a bolt fastening connection. The connecting seat has at least two mounting holes.

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