Folding ladder stand of heavy semitrailer

Abstract

The utility model relates to the technical field of foldable crawling ladders, and discloses a foldable crawling ladder for a heavy semitrailer, which comprises a mounting rack A and a mounting rack B. The upper end of the mounting rack B is also provided with angle steel, the surfaces of the mounting rack A and the angle steel are both provided with mounting holes, one side of the mounting rack A is also provided with a crawling ladder structure for a worker to climb, and the crawling ladder structure is provided with a ladder. A bearing structure is arranged on one side of the crawling ladder structure, the crawling ladder structure can be fixed to the semitrailer through a mounting frame A, a mounting frame B, angle steel, mounting holes and screws, then an air cylinder part is started, a connecting plate can be pushed to move, and under cooperation of a fixing plate, a first connecting rod and a second connecting rod, a mounting base and a pedal body are put down from the semitrailer; workers can be helped to get on and off by means of the pedal body, meanwhile, the electric push rod is started, the connecting block and the bearing plate can be pushed to move downwards till the bearing plate makes contact with the ground, the contact area of the crawling ladder structure and the ground can be increased, and the bearing capacity of the crawling ladder structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of folding ladder, concretely is a heavy semi -trailer folding ladder. BACKGROUND

[0002] The folding ladder of heavy semi -trailer is mainly used to help the driver or staff to get on and off the vehicle or enter the cargo compartment, especially under high compartment or special environment, the ladder provides more safe and convenient access mode, and the folding ladder has the advantages of simple structure, convenient use and small space occupation.

[0003] Like the announcement number for CN217672400U's a semi -trailer hydraulic folding ladder, including device main body, device main body includes the vehicle frame, is set up with the slide groove on the vehicle frame surface, is equipped with the support plate on the left and right sides of the slide groove at the top of the vehicle frame, is set up with the slide rail on the support plate, is equipped with the bearing crosspiece between the support plate, is equipped with the connecting block at the rear end of the bearing crosspiece, is equipped with the tread plate at the front end of the bearing crosspiece, is equipped with the hydraulic push rod between the bottom of the bearing crosspiece and the bottom of the tread plate, is equipped with the slide structure that can be used for folding ladder to store or unfold in the vehicle frame interior, through the slide structure that sets up, can be convenient for the driver to unfold or store the hydraulic folding ladder, when the device uses, the risk coefficient of semi -trailer reduces, will not influence the normal travel of semi -trailer, brings the convenience to the driver.

[0004] The above patent proposes that the hydraulic folding ladder can be unfolded or stored through the slide structure, and the whole is convenient to use, but the folding ladder is not stable during use because the contact area between the bottom of the ladder and the ground is small when the ladder is extended, increasing the risk during use.

[0005] Therefore, we propose a heavy semi -trailer folding ladder to solve the above problems. SUMMARY

[0006] The utility model discloses a heavy semi -trailer folding ladder to solve the above background technology and propose the problem that the contact area between the bottom of the ladder and the ground is small and the ladder is not stable, increasing the risk during use.

[0007] To achieve the above object, the utility model provides the following technical scheme: a heavy semi -trailer folding ladder, including mounting frame A and mounting frame B, mounting frame B is at the upper end of mounting frame A, the upper end of mounting frame B is also provided with angle steel, and mounting hole is set up on the surface of mounting frame A and angle steel, and mounting frame A, mounting frame B and angle steel are fixed on the semi -trailer compartment by cooperating with the screw, one side of mounting frame A is also provided with the ladder structure for the staff to climb, one side of the ladder structure is provided with the bearing structure, and the bearing structure bears the bottom of the ladder structure, so that the ladder structure is stable in use;

[0008] The load-bearing structure comprises a mounting block, an electric push rod mounted at the lower end of the mounting block, a connecting block connected to the telescopic end of the electric push rod, a load-bearing plate slidingly arranged at the outer side of the connecting block, and a plurality of bolts evenly distributed at the outer side of the load-bearing plate, the bolts being used to fix the connecting block and the load-bearing plate.

[0009] Preferably, the ladder structure comprises a fixed frame and a cylinder mounted rotatably at the inner side of the fixed frame, a connecting plate connected to the telescopic end of the cylinder, a first connecting rod arranged at one side of the connecting plate, a fixed plate arranged at the lower end of the mounting frame A, one end of the first connecting rod being hingedly mounted on the fixed plate, a second connecting rod being hingedly mounted at one end of the fixed plate, the second connecting rod being above the first connecting rod, a mounting seat being fixedly mounted at the inner side of the first connecting rod and the second connecting rod, and a pedal body being arranged at the inner side of the mounting seat, the pedal body being used for the staff to step on, when the cylinder is started, the connecting plate is pushed to move, and under the cooperation of the fixed plate, the first connecting rod and the second connecting rod, the mounting seat and the pedal body are lowered from the semitrailer.

[0010] Preferably, the cylinder, the connecting plate, the fixed plate, the first connecting rod and the second connecting rod are arranged in two groups, and the two groups of the cylinder, the connecting plate, the fixed plate, the first connecting rod and the second connecting rod are symmetrically distributed about the center line of the fixed frame A.

[0011] Preferably, the lower end of the first connecting rod is further provided with a supporting rod, the supporting rod being used to support the first connecting rod, and the lowest end of the supporting rod abutting against the ground.

[0012] Preferably, the mounting seat comprises a placing frame and a hinged seat arranged on the side wall of the placing frame, a rotating rod being rotatably connected to the inner side of the hinged seat, the outer side of the rotating rod being sleeved with a clamping block, a clamping groove A being formed in the side wall of the placing frame, and a screw nut being arranged at the outer side of the rotating rod and used for fixing, when the rotating rod is rotated, the clamping block slides into the clamping groove A and is fixed in cooperation with the screw nut.

[0013] Preferably, the surface of the pedal body is provided with anti-skid lines, the lower end of the pedal body is fixedly mounted with a plug-in block, a clamping groove B is formed in the side wall of the plug-in block, the clamping groove B is matched with one end of the clamping block, the plug-in block is inserted into the placing frame, at this time, the clamping groove A and the clamping groove B are communicated, and the assembly between the pedal body and the mounting seat can be realized in cooperation with the clamping block.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The mounting rack A, the mounting rack B, the mounting hole, the angle steel, the ladder structure and the bearing structure are arranged, and the ladder structure is fixed on the semitrailer under the use of the mounting rack A, the mounting rack B, the mounting hole, the angle steel and the screw, so that the staff can get on and off the vehicle by means of the ladder structure, and the bearing structure is used to support the ladder structure, increase the contact area with the ground, and make the ladder structure stable.

[0016] 2. The setting frame, the hinged seat, the rotating rod, the clamping block, the clamping groove A, the nut, the pedal body, the anti-skid pattern, the plug-in block and the clamping groove B are arranged, the plug-in block is positioned in the setting frame, the mounting seat and the pedal body are detachable, the damaged pedal body can be disassembled and replaced, and cost is effectively saved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole three-dimensional structure schematic view of the utility model;

[0018] Figure 2 It is a ladder structure three-dimensional structure schematic view of the utility model;

[0019] Figure 3 It is a mounting seat and pedal body three-dimensional structure schematic view of the utility model;

[0020] Figure 4 It is a mounting seat structure schematic view of the utility model.

[0021] In the drawing: 1, mounting rack A; 2, mounting rack B; 3, mounting hole; 4, angle steel; 5, ladder structure; 51, fixing frame; 52, cylinder piece; 53, connecting plate; 54, fixed plate; 55, first connecting rod; 56, supporting rod; 57, second connecting rod; 58, mounting seat; 581, setting frame; 582, hinged seat; 583, rotating rod; 584, clamping block; 585, clamping groove A; 586, nut; 59, pedal body; 591, anti-skid pattern; 592, plug-in block; 593, clamping groove B; 6, bearing structure; 61, mounting block; 62, electric push rod; 63, connecting block; 64, bearing plate; 65, bolt. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Embodiment one: please refer to Figures 1-3The utility model provides a heavy semi -trailer folding ladder, including mounting frame A1 and mounting frame B2, mounting frame B2 is at the upper end of mounting frame A1, the upper end of mounting frame B2 still is provided with angle steel 4, and the surface of mounting frame A1 and angle steel 4 all are provided with mounting hole 3, and mounting frame A1, mounting frame B2 and angle steel 4 are fixed on the semi -trailer compartment with the cooperation of screw, one side of mounting frame A1 still is provided with the ladder structure 5 for the staff to climb, one side of ladder structure 5 is provided with bearing structure 6, and bearing structure 6 bears the bottom of ladder structure 5, so that ladder structure 5 is stable in use,

[0024] Bearing structure 6 includes mounting block 61 and electric push rod 62 installed at the lower end of mounting block 61, the telescopic end of electric push rod 62 is connected with link block 63, bearing plate 64 is slidably arranged on the outer side of link block 63, a plurality of bolts 65 are uniformly distributed on the outer side of bearing plate 64, and the bolts 65 are used to fix link block 63 and bearing plate 64, when ladder structure 5 is used, electric push rod 62 is started, link block 63 and bearing plate 64 are pushed down, until bearing plate 64 contacts the ground, the contact area of ladder structure 5 and the ground can be increased, so that the bearing capacity of ladder structure 5 is stronger, and it is beneficial to use.

[0025] Ladder structure 5 includes fixed frame 51 and cylinder 52 rotatably installed on the inner side of fixed frame 51, the telescopic end of cylinder 52 is connected with link plate 53, one side of link plate 53 is provided with first connecting rod 55, the lower end of mounting frame A1 is provided with fixed plate 54, one end of first connecting rod 55 is hingedly installed on fixed plate 54, one end of fixed plate 54 is also hingedly installed with second connecting rod 57, second connecting rod 57 is above first connecting rod 55, mounting seat 58 is fixedly installed on the inner side of first connecting rod 55 and second connecting rod 57, and pedal body 59 is arranged on the inner side of mounting seat 58, pedal body 59 is used for staff to step on, when cylinder 52 is started, link plate 53 is pushed to move, and under the cooperation of fixed plate 54, first connecting rod 55 and second connecting rod 57, mounting seat 58 and pedal body 59 are lowered from the semi -trailer, which can help the staff to get on and off the vehicle.

[0026] Cylinder 52, link plate 53, fixed plate 54, first connecting rod 55 and second connecting rod 57 are provided with two groups, and the two groups of cylinder 52, link plate 53, fixed plate 54, first connecting rod 55 and second connecting rod 57 are symmetrically distributed about the center line of mounting frame A1.

[0027] The lower end of first connecting rod 55 is also provided with support rod 56, and support rod 56 is used to support first connecting rod 55.

[0028] In the embodiment, before use, the mounting frame A1 and the mounting frame B2 are close to the semitrailer compartment, and are fixed by cooperating with the angle steel 4, the mounting hole 3 and the screw, so that the ladder structure 5 is placed on the semitrailer, then the air cylinder 52 is started, the connecting plate 53 is pushed to move, and under the cooperation of the fixed plate 54, the first connecting rod 55 and the second connecting rod 57, the mounting seat 58 and the pedal body 59 are lowered from the semitrailer, and the supporting rod 56 is placed on the ground, the first connecting rod 55 can be supported, at this time, the pedal body 59 can help the staff get on and off the vehicle, and meanwhile, the electric push rod 62 is started, the connecting block 63 and the bearing plate 64 are pushed to move downwards until the bearing plate 64 contacts the ground, the contact area of the ladder structure 5 and the ground is increased, the bearing capacity of the ladder structure 5 is stronger, and this is beneficial to use.

[0029] Embodiment two: the embodiment is improved on the basis of embodiment one, and specifically, please refer to Figure 3 and Figure 4 The mounting seat 58 comprises a placing frame 581 and a hinged seat 582 arranged on the side wall of the placing frame 581, the inner side of the hinged seat 582 is rotationally connected with a rotating rod 583, the outer side of the rotating rod 583 is sleeved with a clamping block 584, the side wall of the placing frame 581 is provided with a clamping groove A 585, and the outer side of the rotating rod 583 is further provided with a nut 586 for fixing. When the rotating rod 583 rotates, the clamping block 584 slides into the clamping groove A 585 and is fixed by cooperating with the nut 586, so that the position of the clamping block 584 does not move.

[0030] The surface of the pedal body 59 is provided with anti-skid lines 591, and the lower end of the pedal body 59 is fixedly provided with a plug-in block 592, the side wall of the plug-in block 592 is provided with a clamping groove B 593, the clamping groove B 593 is matched with one end of the clamping block 584, the plug-in block 592 is inserted into the placing frame 581, at this time, the clamping groove A 585 and the clamping groove B 593 are communicated, and the assembly between the pedal body 59 and the mounting seat 58 can be realized by cooperating with the clamping block 584, which is convenient to disassemble and assemble and is beneficial to replace the pedal body 59.

[0031] In the embodiment, the plug-in block 592 is inserted into the placing frame 581, at this time, the clamping groove A 585 and the clamping groove B 593 are communicated, then the rotating rod 583 is rotated, the clamping block 584 slides into the clamping groove A 585 and the clamping groove B 593, and is fixed by cooperating with the nut 586, so that the position of the clamping block 584 does not move, that is, the plug-in block 592 is fixed in the placing frame 581, the assembly between the pedal body 59 and the mounting seat 58 is realized, and vice versa, the pedal body 59 and the mounting seat 58 are disassembled, which is beneficial to replace the pedal body 59 and effectively saves the cost.

[0032] Working principle: before use, install the mounting frame A1 and the mounting frame B2 close to the semitrailer compartment, and cooperate with the angle steel 4, the mounting hole 3 and the screw can be fixed, so that the ladder structure 5 is placed on the semitrailer, then start the cylinder piece 52, can push the adapter plate 53 to move, and under the cooperation of the fixed plate 54, the first connecting rod 55 and the second connecting rod 57, make the mounting seat 58 and the pedal body 59 from the semitrailer down to use, at the same time, start the electric push rod 62, can push the adapter block 63 and the bearing plate 64 to move downward, until the bearing plate 64 contacts with the ground, can increase the contact area of the ladder structure 5 and the ground, insert the plug-in block 592 into the installation frame 581, at this time, the clamping groove A 585 and the clamping groove B 593 are communicated, then rotate the rotating rod 583, make the clamping block 584 slide into the clamping groove A 585 and the clamping groove B 593, and cooperate with the nut 586 to fix, make the position of the clamping block 584 does not move, that is, the plug-in block 592 can be fixed in the installation frame 581, realize the assembly between the pedal body 59 and the mounting seat 58.

[0033] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0034] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A heavy-duty semitrailer folding ladder, comprising a mounting frame A (1) and a mounting frame B (2) at the upper end of the mounting frame A (1), the upper end of the mounting frame B (2) is further provided with an angle steel (4), the surfaces of the mounting frame A (1) and the angle steel (4) are both provided with mounting holes (3), and characterized in that: one side of the mounting frame A (1) is further provided with a ladder structure (5) for workers to climb, one side of the ladder structure (5) is provided with a bearing structure (6) bearing the bottom of the ladder structure (5). The bearing structure (6) comprises a mounting block (61) and an electric push rod (62) mounted at the lower end of the mounting block (61), the telescopic end of the electric push rod (62) is connected with a connecting block (63), the outer side of the connecting block (63) is slidably provided with a bearing plate (64), and the outer side of the bearing plate (64) is uniformly distributed with a plurality of bolts (65), which are used to fix the connecting block (63) and the bearing plate (64), when the ladder structure (5) is used, the electric push rod (62) is started, the connecting block (63) and the bearing plate (64) can be pushed to move downward.

2. A folding step for a heavy duty semitrailer according to claim 1, characterized in that: The ladder structure (5) comprises a fixed frame (51) and a cylinder piece (52) rotatably installed on the inner side of the fixed frame (51), the telescopic end of the cylinder piece (52) is connected with a connecting plate (53), one side of the connecting plate (53) is provided with a first connecting rod (55), the lower end of the mounting frame A (1) is provided with a fixed plate (54), one end of the first connecting rod (55) is hingedly installed on the fixed plate (54), one end of the fixed plate (54) is also hingedly installed with a second connecting rod (57), the second connecting rod (57) is above the first connecting rod (55), the inner sides of the first connecting rod (55) and the second connecting rod (57) are both fixedly installed with a mounting seat (58), the inner side of the mounting seat (58) is provided with a pedal body (59), which is used for workers to step on, when the cylinder piece (52) is started, the connecting plate (53) can be pushed to move.

3. A folding step for a heavy duty semitrailer according to claim 2, characterized in that: The cylinder piece (52), the connecting plate (53), the fixed plate (54), the first connecting rod (55) and the second connecting rod (57) are all provided with two groups, and the two groups of the cylinder piece (52), the connecting plate (53), the fixed plate (54), the first connecting rod (55) and the second connecting rod (57) are symmetrically distributed about the center line of the mounting frame A (1).

4. A folding step for a heavy duty semitrailer according to claim 3, characterized in that: The lower end of the first connecting rod (55) is further provided with a supporting rod (56), which is used to support the first connecting rod (55).

5. A folding step for a heavy duty semitrailer according to claim 4, characterized in that: The mounting seat (58) comprises a placing frame (581) and a hinged seat (582) provided on the side wall of the placing frame (581), the inner side of the hinged seat (582) is rotatably connected with a rotating rod (583), the outer side of the rotating rod (583) is sleeved with a clamping block (584), the side wall of the placing frame (581) is provided with a clamping groove A (585), and the outer side of the rotating rod (583) is further provided with a fixing nut (586).

6. A folding step for a heavy duty semitrailer according to claim 5, characterized in that: The surface of the pedal body (59) is provided with anti-skid lines (591), and the lower end of the pedal body (59) is fixedly provided with a plug block (592), and the side wall of the plug block (592) is provided with a clamping groove B (593) matched with one end of the clamping block (584).

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