Electric remote control chain type turnover ladder for vehicle

Abstract

The invention discloses an electric remote control chain type overturning ladder for a vehicle, and relates to the technical field of emergency rescue. The bottom connecting mechanism is fixedly connected with the top of the rescue vehicle through a connecting frame; the upper connecting mechanism is arranged above the bottom connecting mechanism, the upper connecting mechanism is fixedly connected with the rescue ladder, and the upper connecting mechanism is in sliding connection with the bottom connecting mechanism; and the controllable traction mechanism is arranged between the bottom connecting mechanism and the upper connecting mechanism, and the unfolding speed is improved under the condition that the buffering effect is not affected by manually changing the unfolding overturning angle of the upper connecting mechanism through the controllable traction mechanism. By means of the turnover mechanism, the situation that rescuers need to take a ladder up and down is avoided, meanwhile, the turnover mechanism can be suitable for different use environments in the unfolding process and can be rapidly unfolded, the rescue efficiency is improved, and the effect of buying for time is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of emergency rescue, in particular to a vehicle electric remote control chain type turnover ladder. BACKGROUND

[0002] In urban rescue, when the rescue vehicle cannot approach the building, the rescue personnel can unfold the folding ladder to approach the building from different angles for rescue. In field rescue, the folding ladder can cross ditches, rivers and other obstacles, and therefore the rescue vehicle often has a rescue ladder.

[0003] However, the existing rescue ladder is limited by the internal space of the rescue vehicle (the rescue vehicle often has some fire-fighting equipment, such as fire-fighting equipment and emergency rescue equipment) during placement, so the rescue ladder is generally placed on one side of the roof of the vehicle (placing these large ladders outside can make full use of the space outside the vehicle, increase the equipment carrying capacity of the rescue vehicle, and placing the rescue ladder outside can be more flexible according to the actual situation. In some narrow streets or field rescue sites, if the ladder is placed in the vehicle, it may be difficult to take out and use due to space limitations, while external placement is not limited by this, and rescue personnel can quickly adjust the use mode and position of the ladder according to the site terrain). However, the rescue ladder and the roof of the rescue vehicle are usually connected with the vehicle body by bolts, buckles and other connecting parts, and are in a fixed state at ordinary times, and are manually unfolded for use. When these fasteners are used for connection, the rescue ladder needs to be manually taken out, and some rescue ladders are large in size, which cannot be taken out by rescue personnel in time, effectively and safely, and are also not easy to place when needed. Therefore, a device for conveniently taking out the rescue ladder and stably connecting it with the rescue vehicle is needed. SUMMARY

[0004] The technical solution of the present application provides a significantly different solution from the prior art to solve the technical problem of the existing rescue ladder placed on the roof of the rescue vehicle being inconvenient to take out due to its size.

[0005] The embodiment of the present application adopts the following technical solution: a vehicle electric remote control chain type turnover ladder further comprises: A bottom connecting mechanism is connected and fixed with the top of the rescue vehicle through a connecting frame; An upper connecting mechanism is arranged above the bottom connecting mechanism, the upper connecting mechanism is connected with the rescue ladder, and the upper connecting mechanism and the bottom connecting mechanism are slidingly connected; Controllable traction mechanism is arranged between the bottom connecting mechanism and the upper connecting mechanism, and the opening and turning angle of the upper connecting mechanism is artificially changed through the controllable traction mechanism, so that the unfolding speed is improved without affecting the buffering effect.

[0006] Further, the bottom connecting mechanism comprises a bottom connecting framework assembly, which is connected to the top of the rescue vehicle through bolts or welding, and a front and rear sprocket assembly is arranged on the bottom connecting framework assembly, and a bottom sliding table assembly is arranged in the bottom connecting framework assembly, and a friction surface is arranged between the upper surfaces of the bottom connecting framework assemblies.

[0007] Further, the upper connecting mechanism comprises an upper connecting framework assembly, a plurality of support fixing members are arranged on the upper connecting framework assembly for position fixing of the rescue ladder, a ladder support plate is arranged on one side top of the upper connecting framework assembly, an arc-shaped buffer plate is arranged outside the ladder support plate, a sensing assembly is arranged between the arc-shaped buffer plate and the ladder support plate, a connecting frame is further arranged on the upper connecting framework assembly, and an upper sliding table assembly is arranged in the upper connecting framework assembly, the upper sliding table assembly is connected with the bottom connecting framework assembly, and the upper sliding table assembly and the upper connecting framework assembly are slidingly connected.

[0008] Further, the front and rear sprocket assembly comprises a front sprocket and a rear sprocket, one side sprocket is connected with a driving motor, the front sprocket and the rear sprocket are connected through a chain, the front sprocket is connected with the bottom sliding table assembly through a fastener, the bottom sliding table assembly is locked with the upper connecting framework assembly, and the one side sprocket is rotationally connected with the upper sliding table assembly through a hinge above the one side sprocket.

[0009] Further, the controllable traction mechanism comprises an adjustable buffer assembly and a deflection angle control assembly, the adjustable buffer assembly comprises a movable rod and a connecting sleeve, the movable rod is located in the connecting sleeve, a damping block is arranged at the end of the movable rod, the damping block is wrapped by a damping sleeve, the damping sleeve and the connecting sleeve are slidingly connected, a plurality of limiting strips are arranged through the connecting sleeve, a contact ring connected with an electric control push rod is arranged at both ends of the connecting sleeve, the fixed end of the electric control push rod is connected with the connecting sleeve through a baffle, and the contact surface between the contact ring and the limiting strips is conical.

[0010] Further, the deflection angle control assembly comprises a connecting rod connected with the bottom sliding table assembly, a flexible connecting plate connected between the connecting rod and the end of the connecting sleeve, a transmission ring in contact with the upper surface of the upper connecting framework assembly, a switchable ratchet assembly arranged at the center of the transmission ring, a center shaft of the switchable ratchet assembly connected with the connecting ring through a transmission assembly, a connecting ring connected with the tail of the connecting sleeve through a connecting rod, the connecting rod additionally connected with the center shaft through a connecting sleeve ring, the connecting sleeve additionally connected with the center shaft through a hinge support assembly arranged at the connecting sleeve, an electric control abutting rod arranged at the bottom of the connecting sleeve to push the connecting sleeve to move, the electric control abutting rod connected with the connecting ring, the transmission ring connected with the electric control push rod through an L-shaped mounting sliding block, and the L-shaped mounting sliding block connected with the bottom connecting framework assembly through a through slot formed in the bottom connecting framework assembly, so that the L-shaped mounting sliding block only slides and does not rotate with the transmission ring.

[0011] Further, the inner through hole of the damping sleeve is tapered.

[0012] Further, the damping sleeve is made of a plastic deformable material, the limiting strip is in natural contact with the outer surface of the damping sleeve in the initial state, and the contact surface of the limiting strip and the damping sleeve is made of a high-friction damping material.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows: Firstly, by arranging the bottom mechanism and the upper connecting mechanism, the space can be reduced as much as possible during the integration of the rescue vehicle and the rescue ladder, and the installation on the roof does not occupy the internal space of the rescue vehicle, and the upper connecting mechanism is connected with the rescue ladder, which can complete the connection and fixation of the rescue ladder through the support fixing members arranged thereon (the connection and fixation can be connected through locking members), and the upper connecting mechanism can be automatically unfolded during use, so that the rescue personnel do not need to get on and off the vehicle, and only need to wait for the equipment to unfold to transfer the rescue ladder (i.e. the turnover ladder in the name, which realizes translation and then turnover to drive the rescue ladder to move); Secondly, through the controllable traction mechanism provided thereon, the time required for the upper connecting mechanism to deploy can be effectively reduced, and the device can be controlled to slow down when it is deployed to the end. At this time, it needs to be explained that the end is not the end of deployment, but the upper connecting mechanism automatically slows down when it is about to contact the ground. That is, the existing device determines the tilting speed by its own weight, controls the descending speed by using dampers and gas springs, and thus the overall descending time is certain. However, in the process of emergency rescue, time is often of the essence. Therefore, by canceling the gas spring device and replacing it with a controllable traction mechanism, the mechanism does not provide damping to the inverted ladder frame at the beginning, but provides a deceleration effect when it approaches the ground. Without affecting the safety of the operation, the opening speed is greatly reduced. The ground can be any angle of the ground for different operating environments, such as mountains and slopes, which belong to inclined surfaces. Secondly, through the existing ordinary sliding deployment mechanism, the deployment range required in the deployment process is too large, which leads to the fact that the inverted ladder has high requirements for the use environment when in use. However, by using the deflection angle control assembly in the controllable traction mechanism, the initial deployment angle can be artificially adjusted to forcibly deflect, so that the required turning space in the final turning process changes. Therefore, the adaptability of the turning mechanism to the size of the space during turning is effectively improved, and the versatility of the emergency device is improved.

[0014] In summary, the turning mechanism avoids the need for rescue personnel to take the ladder up and down, and can be suitable for different use environments during deployment, and can be quickly deployed to improve rescue efficiency and achieve the effect of "winning seconds". BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0016] Figure 1 It is the first structure diagram of the first view angle structure of the first structure of the inverted ladder of the present application. Figure 2 It is the structure diagram of the bottom connecting mechanism of the present application. Figure 3 It is the structure diagram of the upper connecting mechanism of the present application. Figure 4 It is a part of the structure diagram of the front and rear sprocket assembly of the present application. Figure 5 Figure 2 is a first perspective view of a second structure of the flip ladder according to the present application; Figure 6 Figure 3 is a first perspective view of a third structure of the flip ladder according to the present application; Figure 5 Figure 4 is an enlarged view of part A in Figure 3; Figure 7 Figure 5 is a second perspective view of the second structure of the flip ladder according to the present application; Figure 8 Figure 6 is a first perspective view of a connection structure of a controllable traction mechanism and a bottom connecting mechanism according to the present application; Figure 9 Figure 7 is a sectional view of a connecting sleeve of the controllable traction mechanism according to the present application; Figure 10 Figure 8 is a second perspective view of the third structure of the flip ladder according to the present application; Figure 9 Figure 9 is an enlarged view of part B in Figure 8; Figure 11 Figure 10 is a perspective view of a ladder support plate structure according to the present application; Figure 12 Figure 11 is a second perspective view of the connection structure of the controllable traction mechanism and the bottom connecting mechanism according to the present application.

[0017] Reference signs: 1. bottom connecting mechanism; 11. bottom connecting framework assembly; 12. bottom sliding table assembly; 13. front and rear sprocket assembly; 2. upper connecting mechanism; 21. upper sliding table assembly; 22. upper connecting framework assembly; 23. support fixing member; 24. ladder support plate; 25. induction assembly; 26. arc-shaped buffer plate; 27. connecting frame; 3. controllable traction mechanism; 31. movable rod; 32. connecting sleeve; 33. electric control push rod; 331. L-shaped connecting sliding block; 34. abutting ring; 35. limiting strip; 36. damping sleeve; 37. damping block; 38. transmission ring; 39. switchable ratchet assembly; 310. electric control switching assembly; 311. flexible connecting plate; 312. connecting ring; 313. connecting rod; 314. transmission assembly; 315. hinged support assembly; 316. connecting sleeve ring. DETAILED DESCRIPTION

[0018] The technical solutions of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0019] The components of the embodiments of the present application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application.

[0020] All other embodiments obtained by those of ordinary skill in the art with reference to the embodiments disclosed in the present application without creative efforts shall fall within the scope of the present application.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Embodiment 1: The following is an embodiment of the present application Figures 1 to 6 As shown in the drawings, the present application provides a vehicle electric remote control chain type turnover ladder, which further comprises: A bottom connecting mechanism 1 is connected and fixed to the top of the rescue vehicle through a connecting frame 27; An upper connecting mechanism 2 is arranged above the bottom connecting mechanism 1, the upper connecting mechanism 2 is connected with the rescue ladder, and the upper connecting mechanism 2 and the bottom connecting mechanism 1 are slidingly connected; A controllable traction mechanism 3 is arranged between the bottom connecting mechanism 1 and the upper connecting mechanism 2, the controllable traction mechanism 3 artificially changes the opening and turnover angle of the upper connecting mechanism 2 and improves the unfolding speed without affecting the buffering effect.

[0024] Specifically, the bottom connecting mechanism 1 comprises a bottom connecting framework assembly 11, the bottom connecting framework assembly 11 is connected to the top of the rescue vehicle through bolts or welding, a front and rear sprocket assembly 13 is arranged on the bottom connecting framework assembly 11, and a bottom sliding table assembly 12 is arranged in the bottom connecting framework assembly 11, and a friction surface is arranged between the upper surfaces of the bottom connecting framework assembly 11.

[0025] When working, it is necessary to additionally explain that the friction surface is arranged at intervals, and the friction surface can be made of additional high-friction material to achieve the friction effect.

[0026] Specifically, the upper connecting mechanism 2 comprises an upper connecting framework assembly 22, a plurality of support fixing members 23 are arranged on the upper connecting framework assembly 22 for position fixing of the rescue ladder, a ladder support plate 24 is arranged at the top of one side of the upper connecting framework assembly 22, an arc-shaped buffer plate 26 is arranged outside the ladder support plate 24, a sensing assembly 25 is arranged between the arc-shaped buffer plate 26 and the ladder support plate 24, a connecting frame 27 is further arranged on the upper connecting framework assembly 22, and an upper sliding table assembly 21 is arranged in the upper connecting framework assembly 22, the upper sliding table assembly 21 is connected with the bottom connecting framework assembly 11, and the upper sliding table assembly 21 is slidingly connected with the upper connecting framework assembly 22. The sensing assembly 25 comprises a position detector and a touch detector. The arc-shaped buffer plate 26 is provided with through holes for sensing of the sensing assembly 25.

[0027] Specifically, the front and rear sprocket assembly 13 comprises front sprockets and rear sprockets, one side of which is connected with a driving motor, and the front sprockets and the rear sprockets are connected through a chain, the front sprockets are connected with the bottom sliding table assembly 12 through fasteners, and the bottom sliding table assembly 12 is locked and connected with the upper connecting framework assembly 22, and the one side of the sprocket is rotatably connected between the upper sliding table assembly 21 through a hinged member.

[0028] When working, the front and rear sprocket assembly 13 comprises front sprockets and rear sprockets, the front sprockets and the rear sprockets are driven through a chain, a driving motor is connected with one of the sprockets, the driving motor drives the rotation of one of the sprockets, and drives the movement of the chain, wherein the bottom sliding table assembly 12 is fixedly connected with the upper connecting framework assembly 22, the chain is connected with the bottom sliding table assembly 12 through a locking member, so that when the chain moves, the bottom sliding table assembly 12 moves synchronously, the movement of the bottom sliding table assembly 12 drives the movement of the upper connecting framework assembly 22, and finally the movement of the upper connecting framework assembly 22 is realized.

[0029] In embodiment 2, the bottom connecting mechanism 1 and the upper connecting mechanism 2 in the turnover ladder are unchanged, only the connected gas springs are replaced by controllable traction mechanisms 3 to improve the applicability and flexibility, when additional controllable traction mechanisms 3 are needed, a placing groove is arranged on the upper connecting framework assembly 22 of the upper connecting mechanism 2 for placing a transmission ring 38, and the placing groove is larger than the transmission ring 38, so that the existence of the transmission ring 38 does not affect the deflection of the upper connecting mechanism 2, and the transmission ring 38 does not deflect with the upper connecting mechanism 2.

[0030] Specifically, the controllable traction mechanism 3 includes an adjustable buffer assembly and a deflection angle control assembly. The adjustable buffer assembly includes a movable rod 31 and a connecting sleeve 32. The movable rod 31 is located in the connecting sleeve 32, and the end of the movable rod 31 is provided with a damping block 37. The damping block 37 is wrapped with a damping sleeve 36, which is slidingly connected with the connecting sleeve 32. A plurality of limiting strips 35 are provided through the connecting sleeve 32. The connecting sleeve 32 is provided with a contact ring 34 connected with an electric control push rod 33 at both ends. The fixed end of the electric control push rod 33 is connected with the connecting sleeve 32 through a baffle. The contact surface between the contact ring 34 and the limiting strip 35 is tapered.

[0031] At this time, it needs to be additionally explained that on some vehicle models, a gas spring can be directly selected instead of the controllable traction mechanism 3 to realize the connection between the bottom connecting mechanism 1 and the upper connecting mechanism 2 through the controllable traction mechanism 3. At this time, the gas spring is used to dampen and tighten the upper connecting mechanism 2, so that the upper connecting mechanism 2 is slowly deflected, playing a role of gradually unfolding.

[0032] Specifically, the deflection angle control assembly includes a connecting rod 313 and a transmission ring 38. The connecting rod 313 is connected with the bottom sliding table assembly 12. The connecting rod 313 is connected with the end of the connecting sleeve 32 through a flexible connecting plate 311. The transmission ring 38 is in contact with the upper surface of the upper connecting framework assembly 22. A switchable ratchet assembly 39 is provided at the center of the transmission ring 38. The direction of the ratchet of the switchable ratchet assembly 39 is switched through an electric control switching assembly 310. The end of the central shaft of the switchable ratchet assembly 39 is connected with a connecting ring 312 through a transmission assembly 314. The connecting ring 312 is connected with the tail of the connecting sleeve 32 through a connecting rod. The connecting rod 313 is additionally connected with the central shaft through a connecting sleeve ring 316. The connecting sleeve 32 is additionally connected with the central shaft through a hinge support assembly 315. The bottom of the connecting sleeve 32 is provided with an electric control contact rod for pushing displacement. The electric control contact rod is connected with the connecting ring 312. The transmission ring 38 and the electric control push rod 33 are connected through an L-shaped connecting sliding block 331. The L-shaped connecting sliding block 331 is slidingly connected with the upper connecting framework assembly 11, which is provided with a through slot, so that the L-shaped connecting sliding block 331 only slides and does not rotate with the transmission ring 38. Only horizontal movement is allowed. At the same time, since the connecting rod 313 is additionally connected with the central shaft through the connecting sleeve ring 316, the displacement and position guiding limit can be pushed during movement.

[0033] The transmission assembly 314 includes two gears, one of which is connected with the central shaft, and the other is arranged beside the central shaft gear, so that they are meshed with each other, and the rotation of one gear drives the rotation of the other gear. The gear is connected with the center rod of the connecting ring 312, and the center rod is not connected with the transmission ring 38. When the transmission ring 38 rotates to drive the central shaft to rotate, the connecting ring 312 can be reversely rotated through the arrangement of the transmission assembly 314, so as to achieve the effect of lifting the connecting sleeve 32. The hinged support assembly 315 includes a hinged plate connected with the tail of the connecting sleeve 32 and a sleeve plate sleeved with the center sleeve. The sleeve plate and the hinged plate are hingedly connected, and the hinged support assembly can additionally support the adjusting type buffer assembly during recovery (because the two link plates are of different lengths, the displacement amount is relatively small, but the deflection angle is large), and the hinged support assembly will not affect the angle deflection.

[0034] Specifically, the through hole in the damping sleeve 36 is tapered.

[0035] The damping sleeve 36 and the damping block 37 are made of damping rubber, so that the damping block 37 is slowed down when moving in the damping sleeve 36, and the opening becomes smaller, which causes the friction force to gradually increase. (The friction damping of the damping sleeve 36 and the damping block 37 and the size of the narrowed opening determine the deceleration effect, and the deceleration effect needs to consider the size of the entire device and the weight of the rescue ladder placed thereon. According to different situations, the material can be adjusted) Specifically, the damping sleeve 36 is made of plastic deformable material, and the limiting strip 35 is in natural contact with the outer surface of the damping sleeve 36 in the initial state. The contact surface of the limiting strip 35 and the damping sleeve 36 is made of high-friction damping material.

[0036] When working, the limiting strip 35 can be made of a sawtooth material, and the outer side of the damping sleeve 36 is provided with a plurality of grooves matched with the sawtooth, so as to improve the locking effect.

[0037] The working principle is that when the bottom connecting frame assembly 11 and the upper connecting frame assembly 22 are connected by air springs, the motor is started (with a speed reducer, a driver) during operation, the output shaft works to drive the chain wheel and drive the chain; at the same time, the bottom sliding table assembly 12 on the bottom connecting frame assembly 11 is moved, and the two air springs on the bottom connecting frame assembly 11 are connected with the upper connecting frame assembly 22 through the connecting frame 27. While the bottom sliding table assembly 12 moves, the power is transmitted to the upper connecting frame assembly 22 through the air spring as a medium, so that the upper connecting frame assembly 22 moves, and only the upper connecting frame assembly 22 moves relative to the upper sliding table assembly 21. When the upper connecting frame assembly 22 moves horizontally by a certain distance, it will be inclined downward under the influence of gravity, and the upper connecting frame assembly 22 also has a force from the air spring direction; the air spring and the damper pull the upper connecting frame assembly 22 in the upward direction to make it tilt downward at a moderate speed, which also protects the upper connecting frame assembly 22 of the turnover ladder frame from continuing to slide downward, and the inclination angle of the upper connecting frame assembly 22 will become larger and larger until it reaches a suitable angle and landing height. When the upper connecting frame assembly 22 moves to the ground and hits the landing limit switch, it is closed; the motor stops working, and the process of transporting the ladder from the roof to the ground is completed. The ladder on the turnover ladder frame can be taken down for use, and after use, it is put back on the turnover ladder frame. Then start the motor, reverse the motor, reverse the chain wheel and chain, and retract the turnover ladder. The chain pulls the bottom sliding table assembly 12 to move to the original position, and the air spring also gets power to pull the upper connecting frame assembly 22 upward, and the damper also acts at the same time; the inclination angle of the upper connecting frame assembly 22 becomes smaller and smaller until it is horizontal. The bottom sliding table assembly 12 continues to move to the original position under the force of the chain, and the upper connecting frame assembly 22 also continues to move horizontally until the bottom connecting frame assembly 11 contacts the limit switch to stop the motor, and the process of recovering the ladder is completed; When the gas spring is adjusted as a controllable traction mechanism 3, the overall working principle is the same. During the unfolding process, the gas spring is cancelled, so it no longer plays a damping role during the unfolding process. The moving speed of the upper connecting framework assembly 22 completely depends on the rotating speed of the chain wheel. When an emergency needs to be quickly unfolded, the chain wheel rotating speed is increased, thereby achieving the effect of quickly opening. With continuous unfolding, the movable rod 31 will be continuously pulled out of the connecting sleeve 32 (the same principle as the movable end of the gas spring being continuously pulled out). At this time, the damping block 37 will move the damping sleeve 36 (in the initial state, the limiting strip 35 will not produce a limiting effect on the damping sleeve 36). With the continuous movement of the upper connecting framework assembly 22, when the sensing assembly 25 senses that the distance from the ground is close, the control electric push rod 33 moves the movable end, and the abutting ring 34 moves to produce a large extrusion force on the limiting strip 35. Finally, the deformed limiting strip 35 will also produce an extrusion force on the damping sleeve 36, so that the damping sleeve 36 cannot move. At this time, the damping block 37 will move in the damping sleeve 36. Since the damping sleeve 36 is tapered, the damping block 37 slowly moves from the large end of the tapered port to the small end of the tapered port, which will limit the moving speed of the upper connecting framework assembly 22. Therefore, when reaching the end, it can play a role in deceleration (when reaching the inclination angle, the motor no longer needs to be powered at this time. This part of the running track does not need to be intervened by the motor, only a preliminary displacement is needed. The weight itself can be used for descending. By reducing the speed, the moving speed can be reduced, and the initial state can improve the unfolding speed, thereby effectively improving the unfolding speed). At the same time, when reaching the end, the bottom arc-shaped buffer plate 26 of the ladder support plate 24 can also play a role in deceleration. Secondly, during the unfolding process, due to the influence of position, it may be necessary to deflect in advance. Therefore, during the movement process (when moving to a certain position, the deflection of the upper connecting framework assembly 22 will not interfere with the bottom connecting framework assembly 11), the electric control abutting rod needs to be manually operated to push the connecting sleeve 32, so that it deflects first. Compared with deflecting by its own weight, it can make the deflection angle in advance, and the overall area after unfolding is reduced (such as Figure 8As shown), while in the process of deflection, the connection ring 312 and the transmission ring 38 through the switchable ratchet assembly 39 as direction conversion, so by artificial push, the rotation of the connection ring 312 will not drive the transmission ring 38 to roll, in the process of moving the upper connecting framework assembly 22, due to the friction surface is arranged on the outer side of the transmission ring 38, the transmission ring 38 will roll through the friction surface, each move a certain distance to roll a certain angle, in the recycling process, through the electric telescopic rod to switch the switchable ratchet assembly 39, so that it can follow the rolling in the process of reverse (as the commonly used ratchet wrench, by switching the switch piece can change the direction of the wrench ratchet), when the upper connecting mechanism 2 around the bottom connecting mechanism deflection, at this time due to the upper connecting framework assembly 22 on the upper connecting framework assembly 22 is provided with installation groove, the upper connecting framework assembly 22 deflection, will cause the transmission ring 38 through the installation groove off, the actual transmission ring 38 and the upper connecting framework assembly 22 is not connected, so the deflection of the upper connecting mechanism 2 will not drive the transmission ring 38 to deflection synchronization, at this time will change the upper connecting mechanism 2 and the movable rod 31, at this time the movable rod 31 and the connecting frame 27 hinged link, and the connecting sleeve 32 is actually also hinged link, so when the upper connecting mechanism 2 deflection down, the connecting sleeve 32 and the movable rod 31 angle can occur synchronous change, the existence of the connecting sleeve 32 and the movable rod 31 will not affect the deflection.

[0038] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Vehicle-mounted electric remote-controlled chain-driven tilting ladder, Its characteristics include: Bottom connecting mechanism (1), which is connected to the top of the rescue vehicle via connecting frame (27); The upper connecting mechanism (2) and the bottom connecting mechanism (1) are arranged vertically. The upper connecting mechanism (2) is connected to the rescue ladder, and the upper connecting mechanism (2) and the bottom connecting mechanism (1) are slidably connected. A controllable traction mechanism (3) is provided between the bottom connecting mechanism (1) and the upper connecting mechanism (2). The controllable traction mechanism (3) can be used to manually change the opening and flipping angle of the upper connecting mechanism (2) and increase the unfolding speed without affecting the buffering effect.

2. The vehicle-mounted electric remote-controlled chain-type tilting ladder according to claim 1, characterized in that; The bottom connecting mechanism (1) includes a bottom connecting frame assembly (11), which is connected to the top of the rescue vehicle by bolts or welding. The bottom connecting frame assembly (11) is provided with front and rear sprocket assemblies (13) and a bottom slide assembly (12). The bottom connecting frame assembly (11) has friction surfaces between its upper surfaces.

3. The vehicle-mounted electric remote-controlled chain-type tilting ladder according to claim 1, characterized in that; The upper connecting mechanism (2) includes an upper connecting frame assembly (22). The upper connecting frame assembly (22) is provided with multiple support fixing parts (23) for fixing the position of the rescue ladder. A ladder support plate (24) is provided on the top of one side of the upper connecting frame assembly (22). An arc-shaped buffer plate (26) is provided on the outside of the ladder support plate (24). A sensing component (25) is provided between the arc-shaped buffer plate (26) and the ladder support plate (24). A connecting frame (27) is also provided on the upper connecting frame assembly (22). An upper sliding table assembly (21) is provided in the upper connecting frame assembly (22). The upper sliding table assembly (21) is connected to the bottom connecting frame assembly (11). The upper sliding table assembly (21) and the upper connecting frame assembly (22) are slidably connected.

4. The vehicle-mounted electric remote-controlled chain-type tilting ladder according to claim 2, characterized in that; The front and rear sprocket assemblies (13) include a front sprocket and a rear sprocket. One side of the sprocket is connected to a drive motor, and the front and rear sprockets are connected by a chain. The front sprocket is connected to the bottom slide assembly (12) by fasteners, and the bottom slide assembly (12) is locked to the upper connecting frame assembly (22). The top of one side of the sprocket is rotatably connected to the upper slide assembly (21) by a hinge.

5. The vehicle-mounted electric remote-controlled chain-type tilting ladder according to claim 1, characterized in that; The controllable traction mechanism (3) includes an adjustable buffer assembly and a deflection angle control assembly. The adjustable buffer assembly includes a movable rod (31) and a connecting sleeve (32). The movable rod (31) is located inside the connecting sleeve (32), and a damping block (37) is provided at the end of the movable rod (31). The damping block (37) is wrapped by a damping sleeve (36). The damping sleeve (36) is slidably connected to the connecting sleeve (32). Multiple limiting strips (35) are provided through the connecting sleeve (32). The two ends of the connecting sleeve (32) are provided with abutment rings (34) connected to the electric push rod (33). The fixed end of the electric push rod (33) is connected to the connecting sleeve (32) through a baffle. The contact surface between the abutment ring (34) and the limiting strip (35) is conical.

6. The vehicle-mounted electric remote-controlled chain-type tilting ladder according to claim 5, characterized in that; The deflection angle control assembly includes a connecting rod (313) and a transmission ring (38). The connecting rod (313) is connected to the bottom slide assembly (12). The connecting rod (313) is connected to the end of the connecting sleeve (32) via a flexible connecting plate (311). The transmission ring (38) is in contact with the upper surface of the upper connecting frame assembly (22). A switchable ratchet assembly (39) is provided at the center of the transmission ring (38). The ratchet direction of the switchable ratchet assembly (39) is switched by an electronically controlled switching assembly (310). The end of the central shaft of the switchable ratchet assembly (39) is connected to the connecting ring (312) via a transmission assembly (314). The connecting ring (312) is connected by a link. The rod is connected to the tail of the connecting sleeve (32). The connecting rod (313) is additionally rotatably connected to the central shaft through the connecting collar (316). The connecting sleeve (32) is additionally rotatably connected to the central shaft through the hinged support assembly (315). The bottom of the connecting sleeve (32) is provided with an electrically controlled abutment rod that pushes it to move. The electrically controlled abutment rod is connected to the connecting ring (312). The transmission ring (38) and the electrically controlled push rod (33) are connected through an L-shaped connecting slider (331). The L-shaped connecting slider (331) is slidably connected to the bottom connecting frame assembly (11) with a through groove, so that the L-shaped connecting slider (331) will only slide and will not rotate with the transmission ring (38).

7. The vehicle-mounted electric remote-controlled chain-type tilting ladder according to claim 5, characterized in that; The internal through hole of the damping sleeve (36) is conical.

8. The vehicle-mounted electric remote-controlled chain-type tilting ladder according to claim 5, characterized in that; The damping sleeve (36) is made of a malleable and deformable material. The limiting strip (35) is in natural contact with the outer surface of the damping sleeve (36) in the initial state, and the contact surface between the limiting strip (35) and the damping sleeve (36) is made of a high-friction damping material.

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