Door opening automatic ladder falling structure for truck
By designing an automatic ladder-lowering structure for truck doors, the problem of drivers having to climb handrails or use unstable footboards has been solved. This design enables automatic ladder deployment and ventilation, improving the convenience and safety of trucks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG SHANQI CONSTR MASCH (GRP) CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-04-24
AI Technical Summary
Modern truck cabs have high chassis, requiring drivers to climb directly onto the door handles or use unstable temporary steps, which is cumbersome and dangerous, especially at night or in low light.
Design an automatic ladder-lowering structure for truck doors, in which the ladder is automatically deployed from the bottom of the cab by operating a handle, and the ladder is rotated and deployed using a cylinder and connecting rod system, and is equipped with ventilation components and protective devices.
It provides a safe and convenient way for drivers to easily get in and out of the vehicle in various lighting conditions, and has an automatic ventilation function, which improves the driver's ease of operation and safety.
Smart Images
Figure CN224159222U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of truck technology, specifically to an automatic ladder lowering structure for truck doors. Background Technology
[0002] Cargo trucks, generally referred to as cargo trucks or lorries, include dump trucks, tractor-trailers, off-road trucks for off-highway and roadless areas, and various vehicles manufactured for special needs. They are mainly used for transporting goods, and sometimes also refer to vehicles that can tow other vehicles. They belong to the category of commercial vehicles and can generally be divided into heavy-duty and light-duty vehicles according to their weight. Most trucks are powered by diesel engines, but some light-duty trucks use gasoline, liquefied petroleum gas, or natural gas.
[0003] Trucks are motor vehicles primarily used for transporting goods, and can also carry passengers. They are classified by load capacity into mini, light, medium, and heavy types; and by purpose into ordinary trucks, box trucks, refrigerated trucks, etc. They are characterized by large cargo space and strong power, and are widely used in logistics, freight and other industries, and are an important tool in the modern freight transportation system.
[0004] Existing trucks have the following problems: modern truck cabs generally have high chassis, requiring drivers to climb directly onto the door handles or use unstable temporary steps (such as bricks or a small ladder). This makes operation more cumbersome when carrying tools or supplies, and especially at night or in low light conditions, blurred vision can lead to slow movements. To address these issues, an automatic ladder-lowering structure for truck doors is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide an automatic door-opening ladder structure for trucks, which solves the problem in the background art that, due to the generally high chassis of modern truck cabs, drivers need to directly climb the door handle or use an unstable temporary step.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic ladder lowering structure for a truck, comprising a cab, a door rotatably connected to the front side of the cab, a handle fixedly connected to the left side of the front of the door, a ladder rotatably connected to the front bottom of the cab, a hinge seat two fixedly connected to the rear bottom of the cab, a rotating rod rotatably connected through the middle of the hinge seat two, a hinge seat one fixedly connected to the other end of the rotating rod, a cylinder fixedly connected to the front side of the hinge seat one, a connecting rod fixedly connected to the output end of the cylinder, a connecting ring fixedly connected to the front end of the connecting rod, a connecting shaft rotatably connected through the middle of the connecting ring and rotatably connected to the right side of the ladder, a collision rod slidably connected through the left side of the bottom front of the cab, a switch located in the middle of the cab behind the collision rod and cooperating with the collision rod, and a ventilation assembly located in the middle of the cab.
[0007] By adopting the above technical solution, when the door is opened by the handle and the power is turned off, the cylinder moves the connecting rod, the connecting rod moves the connecting ring, the cylinder moves the connecting shaft, and the connecting shaft rotates the ladder, causing the ladder to protrude from the bottom of the cab.
[0008] As a further description of the above technical solution: the ventilation component includes a frame, the frame extends through and is slidably connected to the middle of the door, a glass window is fixedly connected to the middle of the frame, the outer wall of the glass window is provided with an anti-ultraviolet coating, and a handle is fixedly connected to the rear side of the frame.
[0009] By adopting the above technical solution, ventilation components are used to ventilate the interior of the driver's cab with the exterior.
[0010] As a further description of the above technical solution: a controller is fixedly connected to the bottom of the cab, and the controller is electrically connected to a switch and a cylinder.
[0011] By adopting the above technical solution, the cylinder starts when the switch is de-energized.
[0012] As a further description of the above technical solution: the outer wall of the collision rod is pierced and fitted with a spring, and one end of the spring is fixedly connected to the middle of the cab.
[0013] By adopting the above technical solution, the spring will reset the collision rod.
[0014] As a further description of the above technical solution: a connecting frame is provided on the front side of the door, an insect-proof net is fixedly connected in the middle of the connecting frame, and evenly distributed mounting parts are fixedly connected to the outer wall of the connecting frame. A bolt is threaded through and threaded to the front side of the mounting part, and the bolt is threaded through and threaded to the middle of the door.
[0015] By adopting the above technical solution, the connecting frame is installed through the cooperation of bolts and mounting parts.
[0016] As a further description of the above technical solution: a rack is slidably connected through the top right side of the door, a pin is fixedly connected to the right side of the rack, and the pin is slidably connected through the middle of the door. A second spring is slidably provided through the middle of the door, and one end of the second spring is fixedly connected to the outer wall of the rack.
[0017] By adopting the above technical solution, the second spring moves the rack, causing the pin to be inserted into the door for limiting.
[0018] As a further description of the above technical solution: a gear is rotatably connected through and to the top right side of the door at the bottom of the rack, and the gear meshes with the rack, and a knob is fixedly connected to the rear side of the gear.
[0019] By adopting the above technical solution, rotating the knob drives the gear to rotate.
[0020] As a further description of the above technical solution: a handrail is fixedly connected to the front left side of the driver's cab.
[0021] By adopting the above technical solution, the handrail makes it easier for drivers to get on and off the vehicle.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0023] 1. This utility model provides an automatic ladder lowering structure for truck doors. When the door is opened by the handle, a spring pops out the collision rod, causing the switch to lose power. At this time, the controller starts the cylinder, which moves the connecting rod, which in turn moves the connecting ring. The cylinder then moves the connecting shaft, which in turn rotates the ladder, allowing the ladder to emerge from the bottom of the cab for easy use.
[0024] 2. The present invention provides an automatic door opening and ladder lowering structure for trucks. By turning the knob, the knob drives the gear to rotate, the gear drives the rack to move, and the rack drives the pin to move, so that the pin loses its limiting function. By moving the handle two, the frame moves, so that the glass window can be opened, allowing ventilation between the driver's cab and the outside. Attached Figure Description
[0025] Figure 1 This is a three-dimensional view of the overall structure of this utility model;
[0026] Figure 2 This is the right view of the present invention;
[0027] Figure 3 This is a schematic diagram of the collision rod of this utility model;
[0028] Figure 4 This is a schematic diagram of the switch of this utility model;
[0029] Figure 5 This is a schematic diagram of the pin of this utility model.
[0030] In the diagram: 1. Cab; 2. Handrail; 3. Connecting frame; 4. Bolt; 5. Ladder; 6. Connecting shaft; 7. Door; 8. Mounting component; 9. Handle 1; 10. Insect screen; 11. Controller; 12. Connecting rod; 13. Connecting ring; 14. Cylinder; 15. Hinge seat 1; 16. Rotating rod; 17. Hinge seat 2; 18. Collision rod; 19. Spring 1; 20. Switch; 21. Pin; 22. Gear; 23. Knob; 24. Window; 25. UV-resistant coating; 26. Frame; 27. Handle 2; 28. Spring 2; 29. Rack. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.
[0033] Combination Figure 1-4 An automatic ladder-lowering structure for a truck includes a cab 1. A door 7 is rotatably connected to the front of the cab 1. A handle 9 is fixedly connected to the left front side of the door 7, allowing the door 7 to be opened via the handle 9. A ladder 5 is rotatably connected to the front bottom of the cab 1. A hinge seat 17 is fixedly connected to the rear bottom of the cab 1. A rotating rod 16 is rotatably connected through the middle of the hinge seat 17. A hinge seat 15 is fixedly connected to the other end of the rotating rod 16. A cylinder 14 is fixedly connected to the front of the hinge seat 15. A connecting rod 12 is fixedly connected to the output end of the cylinder 14. The cylinder 14 drives the connecting rod 12 to move. A connecting rod 12 is fixedly connected to the front end of the connecting rod 12. Ring 13, connecting rod 12 drives connecting ring 13 to move, connecting shaft 6 is fixedly connected through the middle of connecting ring 13, and connecting shaft 6 is rotatably connected to the right side of ladder 5. Connecting ring 13 drives connecting shaft 16 to move, connecting shaft 16 drives ladder 5 to rotate, so that ladder 5 is exposed from the bottom of cab 1 for easy use. Collision rod 18 is slidably connected through the bottom left side of front of cab 1. Switch 20 is set in the middle of cab 1 behind collision rod 18, and switch 20 cooperates with collision rod 18. When door 7 is closed, collision rod 18 is disengaged from switch 20, so that switch 20 is energized. Ventilation component is set in the middle of cab 1.
[0034] Combination Figure 5 The ventilation component includes a frame 26, which runs through and slides through the middle of the door 7. A glass window 24 is fixedly connected to the middle of the frame 26. The outer wall of the glass window 24 is provided with an anti-ultraviolet coating 25 to block ultraviolet rays. The material is a single-layer metal layer such as aluminum, nickel, or copper. A handle 27 is fixedly connected to the rear side of the frame 26. The frame 26 is moved by the handle 27 to ventilate the interior of the cab 1.
[0035] Combination Figure 1 and Figure 5A controller 11 is fixedly connected to the bottom of the cab 1, and the controller 11 is electrically connected to the switch 20 and the cylinder 14. When the switch 20 is de-energized, the cylinder 14 is activated, and a spring 19 is fitted through the outer wall of the collision rod 18. One end of the spring 19 is fixedly connected to the middle of the cab 1. The spring 19 drives the collision rod 18 to reset, causing the switch 20 to be de-energized. A connecting frame 3 is provided on the front side of the door 7. An insect screen 10 is fixedly connected in the middle of the connecting frame 3 to prevent insects from entering the cab 1. Evenly distributed mounting parts 8 are fixedly connected to the outer wall of the connecting frame 3. A bolt 4 is threaded through the front side of the mounting part 8 and threaded through and connected to the middle of the door 7. The connecting frame 3 is installed by the cooperation of the bolt 4 and the mounting part 8. The top right side of the door 7 is slidably connected through the bolt 4. A rack 29 is connected to the door 7. A pin 21 is fixedly connected to the right side of the rack 29. The pin 21 passes through and slides through the middle of the door 7. The rack 29 drives the pin 21 to move. The pin 21 is inserted into the door 7 for limiting. A spring 28 passes through the middle of the door 7 and is provided. One end of the spring 28 is fixedly connected to the outer wall of the rack 29. The spring 28 drives the rack 29 to move. A gear 22 is connected to the top right side of the door 7 at the bottom of the rack 29 and is rotatably connected. The gear 22 meshes with the rack 29. The rotation of the gear 22 drives the rack 29 to move. The rack 29 drives the pin 21 to move, so that the pin 21 loses its limiting function. A knob 23 is fixedly connected to the rear side of the gear 22. Rotating the knob 23 drives the gear 22 to rotate. A handrail 2 is fixedly connected to the front left side of the cab 1. The handrail 2 facilitates the driver to get in and out of the vehicle.
[0036] Working principle: When door 7 is opened by handle 19, spring 19 pops out the collision rod 18, causing switch 20 to be de-energized. At this time, controller 11 controls cylinder 14 to start. Cylinder 14 moves connecting rod 12, which in turn moves connecting ring 13. Cylinder 14 then moves connecting shaft 6, which in turn rotates ladder 5, allowing ladder 5 to protrude from the bottom of cab 1 for easy use. When ventilation is needed inside cab 1, knob 23 is turned. Knob 23 rotates gear 22, which in turn moves rack 29. Rack 29 then moves pin 21, which in turn moves frame 26 via handle 27, allowing ventilation between the inside of cab 1 and the outside.
[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A structure for automatic lowering of a ramp upon opening of a door of a truck, comprising a driver's cab (1), characterized in that: A door (7) is rotatably connected to the front of the cab (1). A handle (9) is fixedly connected to the left front side of the door (7). A ladder (5) is rotatably connected to the front bottom of the cab (1). A hinge seat (17) is fixedly connected to the rear bottom of the cab (1). A rotating rod (16) is rotatably connected through the middle of the hinge seat (17). A hinge seat (15) is fixedly connected to the other end of the rotating rod (16). A cylinder (14) is fixedly connected to the front of the hinge seat (15). The output end of the cylinder (14) is fixedly connected to the door. A connecting rod (12) is fixedly connected to the front end of the connecting rod (12), and a connecting ring (13) is fixedly connected to the middle of the connecting ring (13), and a connecting shaft (6) is fixedly connected through the middle of the connecting ring (13), and the connecting shaft (6) is rotatably connected to the right side of the ladder (5). A collision rod (18) is slidably connected through the bottom left side of the front side of the cab (1). A switch (20) is provided in the middle of the cab (1) at the position behind the collision rod (18), and the switch (20) cooperates with the collision rod (18). A ventilation component is provided in the middle of the cab (1).
2. The automatic door opening and ladder lowering structure for a truck according to claim 1, characterized in that: The ventilation assembly includes a frame (26), which extends through and is slidably connected to the middle of the door (7). A glass window (24) is fixedly connected to the middle of the frame (26). The outer wall of the glass window (24) is provided with an anti-ultraviolet coating (25). A handle (27) is fixedly connected to the rear side of the frame (26).
3. The automatic door opening and ladder lowering structure for a truck according to claim 1, characterized in that: A controller (11) is fixedly connected to the bottom of the cab (1), and the controller (11) is electrically connected to the switch (20). The controller (11) is also electrically connected to the cylinder (14).
4. The automatic door opening and ladder lowering structure for a truck according to claim 1, characterized in that: The outer wall of the collision rod (18) is pierced and fitted with a spring (19), and one end of the spring (19) is fixedly connected to the middle of the cab (1).
5. The automatic door opening and ladder lowering structure for a truck according to claim 1, characterized in that: A connecting frame (3) is provided on the front side of the door (7). An insect-proof net (10) is fixedly connected in the middle of the connecting frame (3). An evenly distributed mounting piece (8) is fixedly connected to the outer wall of the connecting frame (3). A bolt (4) is threaded through and threaded to the front side of the mounting piece (8), and the bolt (4) is threaded through and threaded to the middle of the door (7).
6. The automatic door opening and ladder lowering structure for a truck according to claim 2, characterized in that: A rack (29) is slidably connected through the top right side of the door (7). A pin (21) is fixedly connected to the right side of the rack (29), and the pin (21) is slidably connected through the door (7) in the middle. A spring (28) is slidably connected through the middle of the door (7), and one end of the spring (28) is fixedly connected to the outer wall of the rack (29).
7. The automatic door opening and ladder lowering structure for a truck according to claim 1, characterized in that: A gear (22) is rotatably connected through the top right side of the door (7) at the bottom of the rack (29), and the gear (22) meshes with the rack (29). A knob (23) is fixedly connected to the rear side of the gear (22).
8. The automatic door opening and ladder lowering structure for a truck according to claim 1, characterized in that: A handrail (2) is fixedly connected to the front left side of the driver's cab (1).