Hidden drawing type boarding ladder

Abstract

The invention provides a hidden drawing type boarding ladder. The hidden drawing type boarding ladder comprises a left guide rail and a right guide rail. A guide rail cross beam is fixedly connected between the left side of the left guide rail and the left side of the right guide rail, a guide rail middle cross beam is fixedly connected between the middle side of the left guide rail and the middle side of the right guide rail, a rear cross beam is fixedly connected between the top of the right side of the left guide rail and the top of the right side of the right guide rail, and a left rail is slidably connected to the left guide rail. A right rail is connected to the right guide rail in a sliding mode, and a first pedal is arranged between the opposite sides of the left rail and the right rail. According to the hidden drawing type boarding ladder, the boarding ladder is arranged on the lower end face of the vehicle bottom plate in a sliding mode, the boarding ladder is pulled out by manually pulling the telescopic pull rod, people can conveniently get on and off a vehicle and carry equipment, the hidden drawing type boarding ladder can be unfolded when used and can be folded when not used, the structure is simple, use is convenient, and space in the vehicle is not occupied.

Description

Technical Field

[0001] The invention relates to the field of vehicle boarding ladders, and in particular to a hidden drawable vehicle boarding ladder. Background Art

[0002] A semi-trailer is a trailer with the axle placed behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. Semi-trailers are generally three-axle semi-trailers, which are divided into many types such as 11-meter warehouse semi-trailers, 13-meter warehouse semi-trailers, low-bed semi-trailers, etc. It is a heavy-duty transportation vehicle connected to the semi-trailer head through a traction pin.

[0003] The semi-trailer has a working door at the back or side. When transporting equipment and items, operators use ladders to carry the equipment and items. If the ladder is placed inside the semi-trailer, it takes up a lot of space and is inconvenient to carry.

[0004] Therefore, it is necessary to provide a hidden pull-out boarding ladder to solve the above technical problems. Summary of the invention

[0005] The invention provides a hidden drawable boarding ladder, which solves the problems in the background technology.

[0006] In order to solve the above technical problems, the present invention provides a hidden pull-out boarding ladder comprising: a left guide rail and a right guide rail;

[0007] A guide rail crossbeam is fixedly connected between the left side of the left guide rail and the left side of the right guide rail, a guide rail middle crossbeam is fixedly connected between the middle sides of the left guide rail and the right guide rail, a rear crossbeam is fixedly connected between the right top of the left guide rail and the right guide rail, a left track is slidably connected to the left guide rail, and a right track is slidably connected to the right guide rail, a first foot pedal is arranged between the opposite sides of the left track and the right track, a square tube rear foot is movably connected to the left track and the right track, a square tube front foot is movably connected to the left track and the right track, a plurality of second foot pedals are movably connected between the two square tube rear feet and the two square tube front feet, and a telescopic pull rod is fixedly installed between the opposite sides of the two square tube front feet.

[0008] Preferably, the tops of the left rail and the right rail are both fixedly connected with support plates, and the right sides of the two support plates are both fixedly connected with baffles.

[0009] Preferably, the left rail, the right rail and the two square tube rear feet are all fixedly connected with latches, and the outer surfaces of the four latches are fixedly mounted with deep groove ball bearings.

[0010] Preferably, the tops of the first foot pedal and the second foot pedals are all provided with anti-slip grooves.

[0011] Preferably, both the left guide rail and the right guide rail are provided with limiting holes, and the limiting holes are adapted to the telescopic pull rod.

[0012] Preferably, a sliding groove is provided on the opposite side of the left guide rail and the right guide rail, and the left rail and the right rail are respectively slidably connected in the two sliding grooves, a fixing component is arranged between the left guide rail and the right guide rail, and the fixing component includes a U-shaped groove, and two sliding plates are slidably connected inside the U-shaped groove, and a fixing block is arranged on the opposite side of the two sliding plates, and a compression spring is arranged between the separated side of the two sliding plates and the inner wall of the U-shaped groove, and a connecting block is fixedly connected on the opposite side of the two sliding plates, a pressing block is slidably connected to the U-shaped groove, and a mounting block is fixedly connected to the pressing block.

[0013] Preferably, the left sides of the two fixing blocks are both provided with inclined surfaces.

[0014] Preferably, the two connecting blocks are provided with inclined surfaces on one side facing the mounting block, and the mounting block is in the shape of an isosceles trapezoid.

[0015] Preferably, a fixing groove is fixedly connected to one side of the left track and the right track that are separated from each other, and the fixing groove is adapted to the fixing block.

[0016] Compared with the related art, the hidden pull-out boarding ladder provided by the present invention has the following beneficial effects:

[0017] The present invention provides a hidden pull-out boarding ladder. The telescopic pull rod is manually pulled to make the front foot of the square tube move to the right, thereby making the left track and the right track move to the right. The ladder stops when the baffle plate contacts the rear cross beam. Then the front foot of the square tube is put down to make the rear foot of the square tube contact the ground, thereby making the multiple second foot pedals unfold, thereby making the whole boarding ladder unfold for use. The boarding ladder is slidably arranged on the lower end surface of the vehicle floor. The boarding ladder is pulled out by manually pulling the telescopic pull rod, so that people get on and off the vehicle and carry equipment. The ladder can be unfolded when in use and folded and stowed when not in use. The ladder has a simple structure, is easy to use and does not occupy space in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a first embodiment of a hidden drawer-type boarding ladder provided by the present invention;

[0019] Figure 2 for Figure 1 The schematic diagram of the unfolding of the hidden pull-out boarding ladder shown;

[0020] Figure 3 for Figure 1 An exploded schematic diagram of the hidden pull-out boarding ladder shown;

[0021] Figure 4 A schematic structural diagram of a second embodiment of the hidden drawer-type boarding ladder provided by the present invention;

[0022] Figure 5 for Figure 4 A schematic diagram of the structure of the fixing assembly shown;

[0023] Figure 6 for Figure 5 A side cross-sectional view of a U-shaped channel is shown.

[0024] Numbers in the figure: 1. left guide rail, 2. right guide rail, 3. guide rail crossbeam, 4. guide rail middle crossbeam, 5. rear crossbeam, 6. left track, 7. right track, 8. first foot pedal, 9. square tube rear foot, 10. square tube front foot, 11. second foot pedal, 12. telescopic pull rod, 13. support plate, 14. baffle, 15. latch, 16. deep groove ball bearing, 17. limiting hole, 18. slide groove, 19. fixing assembly, 191. U-shaped groove, 192. sliding plate, 193. fixing block, 194. compression spring, 195. connecting block, 196. pressing block, 197. mounting block, 20. fixing groove. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0026] First embodiment

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 ,in, Figure 1 A schematic structural diagram of a first embodiment of a hidden drawer-type boarding ladder provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the unfolding of the hidden pull-out boarding ladder shown; Figure 3 for Figure 1 The exploded schematic diagram of the hidden retractable boarding ladder is shown. The left guide rail 1 and the right guide rail 2 of the hidden retractable boarding ladder;

[0028] A guide rail crossbeam 3 is fixedly connected between the left side of the left guide rail 1 and the left side of the right guide rail 2, a guide rail middle crossbeam 4 is fixedly connected between the middle sides of the left guide rail 1 and the right guide rail 2, a rear crossbeam 5 is fixedly connected between the right top of the left guide rail 1 and the right guide rail 2, a left track 6 is slidably connected to the left guide rail 1, a right track 7 is slidably connected to the right guide rail 2, a first foot pedal 8 is arranged between the opposite sides of the left track 6 and the right track 7, a square tube rear foot 9 is movably connected to the left track 6 and the right track 7, a square tube front foot 10 is movably connected to the left track 6 and the right track 7, a plurality of second foot pedals 11 are movably connected between the two square tube rear feet 9 and the two square tube front feet 10, and a telescopic pull rod 12 is fixedly installed between the opposite sides of the two square tube front feet 10.

[0029] The tops of the left rail 6 and the right rail 7 are both fixedly connected with support plates 13 , and the right sides of the two support plates 13 are both fixedly connected with baffles 14 .

[0030] The baffle 14 can be provided to limit the position of the left track 6 and the right track 7 , and the baffle 14 stops when it contacts the rear cross beam 5 , thereby preventing the left track 6 and the right track 7 from being separated from the left guide rail 1 and the right guide rail 2 .

[0031] The left rail 6 , the right rail 7 and the two square tube rear legs 9 are all fixedly connected with latches 15 , and deep groove ball bearings 16 are fixedly mounted on the outer surfaces of the four latches 15 .

[0032] The deep groove ball bearing 16 is provided to facilitate movement inside the left guide rail 1 and the right guide rail 2, and can convert sliding friction into rolling friction, making the movement smoother.

[0033] The tops of the first footrest 8 and the second footrests 11 are all provided with anti-slip grooves.

[0034] The anti-skid pattern can prevent skidding and improve safety performance.

[0035] The left guide rail 1 and the right guide rail 2 are both provided with limiting holes 17 , and the limiting holes 17 are adapted to the telescopic pull rod 12 .

[0036] The setting of the limiting hole 17 can cooperate with the telescopic rod 12 to limit and fix the square tube front foot 10. By lifting the telescopic rod 12, the square tube front foot 10 and the square tube rear foot 9 are lifted upward to a horizontal level, and then the telescopic rod 12 is pushed to the left to fold and retract the boarding ladder. As the telescopic rod 12 is pushed to the left, the telescopic rod 12 will gradually align with the limiting hole 17. After the two are aligned, the two ends of the telescopic rod 12 are pulled and extended, and inserted into the limiting hole 17 for limiting and fixing.

[0037] The working principle of the hidden pull-out boarding ladder provided by the present invention is as follows:

[0038] Manually pull the telescopic rod 12 to move the square tube front foot 10 to the right, thereby moving the left track 6 and the right track 7 to the right. The baffle 14 stops when it hits the rear beam 5. Then, the square tube front foot 10 is lowered to make the square tube rear foot 9 also contact the ground, thereby unfolding the multiple second foot pedals 11, so that the entire boarding ladder can be unfolded for use.

[0039] Compared with the related art, the hidden pull-out boarding ladder provided by the present invention has the following beneficial effects:

[0040] Manually pull the telescopic pull rod 12 to move the square tube front foot 10 to the right, thereby moving the left track 6 and the right track 7 to the right. When the baffle 14 hits the rear beam 5, it stops. Then the square tube front foot 10 is lowered to make the square tube rear foot 9 also contact the ground, so that the multiple second foot pedals 11 are unfolded, so that the entire boarding ladder is unfolded for use. The boarding ladder is slidably arranged on the lower end surface of the vehicle floor. The boarding ladder is pulled out by manually pulling the telescopic pull rod 12, which is convenient for people to get on and off the vehicle and carry equipment. It can be unfolded when in use and folded up when not in use. It has a simple structure, is easy to use and does not occupy space in the vehicle.

[0041] Second embodiment

[0042] Please refer to Figure 4-6 Based on the hidden retractable boarding ladder provided in the first embodiment of the present application, the second embodiment of the present application proposes another hidden retractable boarding ladder. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0043] Specifically, the difference of the hidden pull-out boarding ladder provided in the second embodiment of the present application is that a slide groove 18 is provided on the opposite side of the left guide rail 1 and the right guide rail 2, the left rail 6 and the right rail 7 are respectively slidably connected in the two slide grooves 18, a fixing component 19 is arranged between the left guide rail 1 and the right guide rail 2, and the fixing component 19 includes a U-shaped groove 191, and two sliding plates 192 are slidably connected inside the U-shaped groove 191, and a fixing block 193 is arranged on the opposite side of the two sliding plates 192, and a compression spring 194 is arranged between the separated side of the two sliding plates 192 and the inner wall of the U-shaped groove 191, and a connecting block 195 is fixedly connected on the opposite side of the two sliding plates 192, a pressing block 196 is slidably connected to the U-shaped groove 191, and a mounting block 197 is fixedly connected to the pressing block 196.

[0044] The left sides of the two fixing blocks 193 are both provided with inclined surfaces.

[0045] The two connecting blocks 195 are provided with inclined surfaces on one side facing the mounting block 197 , and the mounting block 197 is in the shape of an isosceles trapezoid.

[0046] A fixing groove 20 is fixedly connected to the separated sides of the left rail 6 and the right rail 7 , and the fixing groove 20 is adapted to the fixing block 193 .

[0047] Compared with the related art, the hidden pull-out boarding ladder provided by the present invention has the following beneficial effects:

[0048] When the left rail 6 and the right rail 7 are pulled to the right as the telescopic pull rod 12 is pulled to the right, the two fixed grooves 20 will be driven to move to the right. When the fixed groove 20 contacts the fixed block 193, a force will be applied to the fixed block 193 through the inclined surface of the fixed block 193, so that the fixed block 193 moves toward the inside of the U-shaped groove 191, thereby squeezing the compression spring 194 through the sliding plate 192. When the fixed block 193 is completely aligned with the fixed groove 20, the compression spring 194 rebounds due to the elastic force, so that the fixed block 193 is inserted into the inside of the fixed groove 20, and the fixed groove 20 is limited and fixed, thereby completely fixing the left rail 6 and the right rail 7, improving the stability during deployment and use, and manually pressing the pressing block 196 so that the mounting block 197 squeezes the two connecting blocks 195, so that the two connecting blocks 195 move apart, thereby indirectly causing the two fixed blocks 193 to move apart, and then separate from the two fixed grooves 20, so that the left rail 6 and the right rail 7 lose their restrictions and can slide to the left for folding.

[0049] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hidden pull-out boarding ladder, characterized in that: Includes: left rail and right rail; A guide rail crossbeam is fixedly connected between the left side of the left guide rail and the left side of the right guide rail, a guide rail middle crossbeam is fixedly connected between the middle sides of the left guide rail and the right guide rail, a rear crossbeam is fixedly connected between the right top of the left guide rail and the right guide rail, a left track is slidably connected to the left guide rail, and a right track is slidably connected to the right guide rail, a first foot pedal is arranged between the opposite sides of the left track and the right track, a square tube rear foot is movably connected to the left track and the right track, a square tube front foot is movably connected to the left track and the right track, a plurality of second foot pedals are movably connected between the two square tube rear feet and the two square tube front feet, and a telescopic pull rod is fixedly installed between the opposite sides of the two square tube front feet.

2. The hidden pull-out boarding ladder according to claim 1, characterized in that: The tops of the left rail and the right rail are both fixedly connected with support plates, and the right sides of the two support plates are both fixedly connected with baffles.

3. The hidden pull-out boarding ladder according to claim 1, characterized in that: The left track, the right track and the two square tube rear feet are all fixedly connected with latches, and the outer surfaces of the four latches are all fixedly mounted with deep groove ball bearings.

4. The hidden pull-out boarding ladder according to claim 1, characterized in that: The tops of the first foot pedal and the second foot pedals are all provided with anti-slip grooves.

5. The hidden pull-out boarding ladder according to claim 1, characterized in that: The left guide rail and the right guide rail are both provided with limiting holes, and the limiting holes are adapted to the telescopic pull rod.

6. The hidden pull-out boarding ladder according to claim 1, characterized in that: The left guide rail and the right guide rail are each provided with a sliding groove on one side opposite to the other, and the left rail and the right rail are respectively slidably connected in the two sliding grooves, and a fixing component is arranged between the left guide rail and the right guide rail, and the fixing component comprises a U-shaped groove, and two sliding plates are slidably connected inside the U-shaped groove, and a fixing block is arranged on the opposite side of the two sliding plates, and a compression spring is arranged between the separated side of the two sliding plates and the inner wall of the U-shaped groove, and a connecting block is fixedly connected on the opposite side of the two sliding plates, and a pressing block is slidably connected to the U-shaped groove, and a mounting block is fixedly connected to the pressing block.

7. The hidden pull-out boarding ladder according to claim 6, characterized in that: The left sides of the two fixing blocks are both provided with inclined surfaces.

8. The hidden pull-out boarding ladder according to claim 6, characterized in that: An inclined surface is arranged on one side of the two connection blocks facing the mounting block, and the mounting block is in the shape of an isosceles trapezoid.

9. The hidden pull-out boarding ladder according to claim 6, characterized in that: A fixing groove is fixedly connected to one side of the left track and the right track that are separated from each other, and the fixing groove is matched with the fixing block.

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