Aerial ladder device for rescue and disaster relief

Abstract

The invention relates to a scaling ladder device for rescue and disaster relief, and belongs to the technical field of rescue robots, the scaling ladder device comprises a mobile platform and a telescopic device, the telescopic device comprises a plurality of telescopic pipes with hollow interiors and a plurality of driving blocks, and the inner diameters of the telescopic pipes are different; the telescopic pipes are coaxially sleeved and matched with one another according to the inner diameters of the telescopic pipes from small to large; a driving space exists between every two adjacent telescopic pipes, the multiple driving spaces are matched with the multiple driving blocks in a one-to-one correspondence mode, any driving block is arranged in the corresponding driving space, the driving blocks are coaxially connected with the telescopic pipes with the large inner diameter size, and the inner side walls of the driving blocks are connected with the outer side walls of the telescopic pipes with the small inner diameter size in a meshed mode. And the telescopic pipe with the maximum inner diameter size is rotatably carried on the moving platform.

Description

Technical Field

[0001] This invention belongs to the field of rescue robot technology, specifically relating to a ladder device for rescue and disaster relief. Background Technology

[0002] When a fire breaks out in a high-rise building, people need to evacuate immediately. However, the large number of people inside, coupled with the limitations of the building structure in terms of the number and capacity of evacuation staircases, results in an evacuation rate far slower than the spread of fire and smoke. This can easily create bottlenecks in vertical passageways, delaying escape. If the fire worsens and one or more floors are completely blocked by smoke and fire, internal escape routes are cut off, leaving trapped people in a desperate situation. In such cases, only rescue robots can provide a rapid rescue for people in high-rise buildings.

[0003] Current rescue robots generally use a multi-stage cylinder system with a lead screw-electric cylinder system as the core drive for their lifting structure. Existing lead screw-electric cylinder systems consist of several coaxially connected lead screws that can rotate simultaneously. They also include several telescopic rods, each corresponding to a lead screw. Each telescopic rod is coaxially fitted into a corresponding lead screw. When the electric cylinder starts working, it controls the rotation of the lead screw connected to it, thus causing the other lead screws to rotate together. Furthermore, the rotation of the lead screws causes the telescopic rods to move along the axis of the lead screw. Since the telescopic rod is coaxially fitted into another lead screw, the movement of the telescopic rod drives the movement of that other lead screw along its axis, ultimately achieving simultaneous telescopic control of multiple cylinders.

[0004] The telescopic structure of a multi-stage cylinder relies on the simultaneous rotation of all lead screws, while adjacent lead screws also need to move along the axis of the lead screw being fitted. However, during rescue operations, there are many uncontrollable external factors. For example, when building debris from an explosion hits the multi-stage cylinder, it can cause the threads of any lead screw in the multi-stage cylinder to fail to mesh with the threads of the lead screw being fitted, making it impossible for the multi-stage cylinder structure to continue telescopic control. Ultimately, this may prevent the rescue robot from successfully completing the rescue mission. Summary of the Invention

[0005] To address the problem that during rescue operations, numerous uncontrollable external factors can cause existing rescue robots' multi-stage cylinder structures to malfunction due to mismatches between the threads of any one lead screw and the thread of the sleeved lead screw, thus preventing the entire multi-stage cylinder structure from continuing its extension and retraction control and ultimately hindering the rescue robot's successful completion of its rescue mission, this invention provides a ladder device for rescue and disaster relief.

[0006] The objective of this invention can be achieved through the following technical solutions: A ladder device for rescue and disaster relief includes a mobile platform and a telescopic device. The telescopic device includes several hollow telescopic tubes and several drive blocks. The inner diameters of the telescopic tubes are different from each other. The telescopic tubes are coaxially fitted together according to their respective inner diameters from small to large. There is a drive space between two adjacent telescopic tubes. The drive spaces correspond one-to-one with the drive blocks. Each drive block is set in the corresponding drive space. The drive block is coaxially connected to the telescopic tube with the larger inner diameter. The inner sidewall of the drive block is engaged with the telescopic tube with the smaller inner diameter. The telescopic tube with the largest inner diameter is rotatably mounted on the mobile platform. The telescopic device also includes several abutment blocks, which correspond one-to-one with several driving spaces. Each abutment block is set in the corresponding driving space. The abutment block is coaxially set at the bottom of the outer wall of the telescopic tube with a small inner diameter. The abutment block can lock or release its abutment relationship with the corresponding driving block.

[0007] As a preferred embodiment of the present invention, the meshing connection between the telescopic tube and the drive block has a self-locking capability.

[0008] As a preferred technical solution of the present invention, it also includes a rescue platform. The telescopic device further includes several connecting plates, which correspond one-to-one with several telescopic tubes. Any of the connecting plates is rotatably mounted on the top outer wall of the corresponding telescopic tube. The connecting plates matching the telescopic tubes with inner diameters from large to small are arranged sequentially from bottom to top. Adjacent connecting plates are fitted together in the initial position. The rescue platform is connected to the topmost connecting plate.

[0009] As a preferred embodiment of the present invention, the driving block is provided with a telescopic slot, and the driving block is matched with a driving rod, which is telescopically disposed within the telescopic slot; the outer wall of the telescopic tube is provided with a limiting slot, and a plurality of driving rods are matched one-to-one with a plurality of limiting slots, and any one of the driving rods can lock or release its coaxial engagement relationship with the corresponding limiting slot.

[0010] As a preferred embodiment of the present invention, a plurality of limiting slots are provided on the same telescopic tube, and the plurality of limiting slots are provided at equal intervals along the axial direction of the telescopic tube.

[0011] As a preferred embodiment of the present invention, the driving block is further provided with a sliding groove, which is connected to the telescopic slot hole. The axial direction of the sliding groove is the same as that of the telescopic slot hole. The driving block is also matched with a slidable connecting block, which is connected to the driving rod. The minimum distance between the sliding groove and the inner sidewall of the driving block is greater than 3cm.

[0012] In a preferred embodiment of the present invention, the outer diameter of the drive rod is smaller than the inner diameter of the telescopic slot; the width of the connecting block is equal to the width of the sliding groove.

[0013] As a preferred embodiment of the present invention, it further includes a hydraulic system and a hydraulic rod. The drive block is provided with a hydraulic slot, and the hydraulic rod is slidably disposed in the hydraulic slot. The hydraulic rod is connected to the drive rod. The hydraulic system is disposed in the drive block and is used to drive the hydraulic rod to slide.

[0014] As a preferred embodiment of the present invention, it further includes a connecting rod and a pushing rod. The driving rod has a pushing slot at one end near the hydraulic rod. The axial direction of the pushing slot is parallel to the axial direction of the driving rod. The pushing rod is slidably disposed in the pushing slot. The axial direction of the pushing rod is perpendicular to the axial direction of the pushing slot. The connecting rod is connected to the pushing rod and the hydraulic rod respectively.

[0015] As a preferred embodiment of the present invention, the pushing slot is divided into an extension space, a dwelling space and a retraction space along the axial direction of the pushing slot. When the pushing rod moves to the extension space, the pushing rod abuts against the left end face of the pushing slot. When the pushing rod moves to the retraction space, the pushing rod abuts against the right end face of the pushing slot. When the pushing rod moves to the dwelling space, the pushing rod releases its abutment against the pushing slot.

[0016] The beneficial effects of this invention are as follows: When the drive block and telescopic tube are normally engaged, the rotation of the drive block can only control the telescopic tube to move up and down. When the telescopic tube is deformed by external forces during the up-and-down process, there is a possibility that the structure of the telescopic tube will deform, which may affect the engagement between the telescopic tube and the drive block. This will increase the friction between the telescopic tube and the drive block, making it impossible for the drive block to continue to engage with the telescopic tube normally. When the drive block continues to rotate, the telescopic tube will rotate with the drive block, thereby driving the other telescopic tubes to move up and down. This ensures that the rescue robot can successfully complete the rescue mission. This solves the problem that during the rescue process, due to many uncontrollable external factors, the multi-stage cylinder structure of the existing rescue robot is prone to failure because the thread of any one of the lead screws cannot match the thread of the sleeved lead screw, which will prevent the entire multi-stage cylinder structure from continuing to extend and retract, and may ultimately prevent the rescue robot from successfully completing the rescue mission. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is an overall view of a ladder device for rescue and disaster relief according to the present invention, with all telescopic tubes retracted. Figure 2 This is an overall view of a ladder device for rescue and disaster relief according to the present invention, with all telescopic tubes extending out. Figure 3 This is an overall view of a telescopic tube of a ladder device for rescue and disaster relief according to the present invention when it is extended. Figure 4 This is a diagram showing the connection of parts in the transmission device of a ladder system for rescue and disaster relief according to the present invention. Figure 5 This is an internal cross-sectional view of the telescopic tube of a ladder device for rescue and disaster relief according to the present invention. Figure 6 For the present invention Figure 5 Enlarged view of point A; Figure 7 For the present invention Figure 6 A magnified view of the drive block and telescopic tube in action; Figure 8 For the present invention Figure 7 A top view of the hydraulic rod's inlet space cut laterally; Figure 9 For the present invention Figure 8 A magnified view of a portion of the drive rod; Figure 10 For the present invention Figure 7 A top view of the return space of the hydraulic rod cut laterally.

[0019] Explanation of main symbols In the diagram: 1. Moving platform; 2. Telescopic tube; 201. Restricting slot; 2011. Equal diameter slot; 2012. Enlarged slot; 3. Drive block; 301. Telescopic slot; 302. Sliding groove; 303. Hydraulic groove; 304. Liquid inlet space; 305. Oil return space; 306. Oil inlet slot; 307. Oil return slot; 4. Abutment block; 5. Rescue platform; 6. Connecting plate; 7. Drive rod; 701. Pushing slot; 702. Extension space; 703. Dwelling space; 704. Retraction space; 8. Connecting... 9. Connecting block; 10. Hydraulic system; 11. Hydraulic tank; 12. Inlet hydraulic pump; 13. Return hydraulic pump; 14. Sealing block; 15. Hydraulic rod; 16. Connecting rod; 17. Push rod; 18. Transmission device; 19. Drive motor; 10. Rotating plate; 11. Rotating shaft; 12. Rotating gear; 13. Reduction shaft; 14. Reduction gear; 15. Input gear; 16. Output gear; 17. Auxiliary components; 18. Auxiliary rod; 19. Auxiliary block. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0021] Please see Figures 1-10This embodiment provides a ladder device for rescue and disaster relief, including a mobile platform 1 and a telescopic device. The telescopic device includes several hollow telescopic tubes 2 and several drive blocks 3. The inner diameters of the telescopic tubes 2 are different from each other, and the telescopic tubes 2 are coaxially fitted together according to their respective inner diameters from smallest to largest. It should be noted that among the coaxially fitted telescopic tubes 2, the telescopic tube 2 with the smaller inner diameter can be telescopically installed inside the adjacent telescopic tube 2 with the larger inner diameter. There is a driving space between two adjacent telescopic tubes 2, and several driving spaces are matched one-to-one with several drive blocks 3. Any drive block 3 is set in the corresponding driving space, and the drive block 3 is coaxially connected to the telescopic tube 2 with the larger inner diameter. The inner side wall of the drive block 3 has a driving thread, and the outer side wall of the telescopic tube 2 has a telescopic thread. The driving thread and the telescopic thread are meshed with each other, so that the inner side wall of the drive block 3 is meshed with the outer side wall of the telescopic tube 2 with the smaller inner diameter. The telescopic tube 2 with the largest inner diameter is rotatably mounted on the mobile platform 1. In addition, The telescopic device also includes several abutment blocks 4, which correspond one-to-one with several driving spaces. Each abutment block 4 is set in the corresponding driving space. The abutment block 4 is coaxially set at the bottom of the outer wall of the telescopic tube 2 with a smaller inner diameter. The abutment block 4 can lock or release its abutment relationship with the corresponding driving block 3. It should be noted that, in this scheme, in order to easily distinguish each telescopic tube 2, the outermost telescopic tube 2 is defined as the main telescopic tube, the telescopic tube 2 located inside the main telescopic tube is defined as the secondary telescopic tube, and the telescopic tube 2 located inside the secondary telescopic tube is defined as the main telescopic tube. Telescopic tube 2 is defined as the secondary telescopic tube, and so on. By setting a drive block 3, when the main telescopic tube starts to rotate, that is, when the telescopic tube 2 with the largest inner diameter rotates, the telescopic tube 2 will drive the drive block 3 connected to it to rotate. In turn, the rotation of the drive block 3 will drive the other telescopic tubes 2 located in the main telescopic tube to move up and down together, until the abutment block 4 located between the main telescopic tube and the secondary telescopic tube abuts against the drive block 3. At this time, the main telescopic tube continues to rotate. Due to the abutment block 4 and the drive block 3 abutting against each other, the secondary telescopic tube will change from its original up and down movement to rotational movement due to the friction between the abutment block 4 and the drive block 3, so that the secondary telescopic tube rotates together with the main telescopic tube. As the secondary telescopic tube rotates, it will drive the drive block 3 connected to it to rotate. In turn, the drive block 3 located between the secondary telescopic tube and the secondary telescopic tube will mesh and rotate with the secondary telescopic tube, controlling the other telescopic tubes 2 located in the secondary telescopic tube to continue to move up and down, and so on, until the telescopic device rises to the specified height. Therefore, it can be seen that after any telescopic tube 2 reaches the specified height, due to the abutment block 4 and the drive block 3 abutting and sticking together, the telescopic tube 2 connected to the abutment block 4 will change from its original lifting motion to a rotational motion that rotates together with the main telescopic tube.

[0022] Furthermore, it's worth noting that this design of the telescopic device offers another advantage: when the drive block 3 and telescopic tube 2 are normally engaged, the rotation of the drive block 3 only controls the lifting and lowering of the telescopic tube 2. If the telescopic tube 2 deforms due to external forces during lifting, this deformation could affect the engagement between the tube and the drive block 3, increasing friction and preventing the drive block 3 from continuing its normal engagement. When the drive block 3 continues to rotate, the telescopic tube 2 rotates along with it, driving the remaining telescopic tubes 2 to lift and lower. This ensures the rescue robot can successfully complete its rescue mission. It also solves the problem that during rescue operations, numerous uncontrollable external factors can cause existing multi-stage cylinder structures in rescue robots to fail to engage properly due to mismatched threads between any one lead screw and the fitted lead screw, preventing the entire multi-stage cylinder structure from continuing its telescopic control and ultimately hindering the rescue robot's ability to complete its mission.

[0023] It is worth noting that the helix angle of the drive thread of the drive block 3 in this solution is less than or equal to the friction angle. This setting enables the meshing connection between the drive block 3 and the telescopic tube 2 to have a self-locking capability, preventing the telescopic tube 2 from moving up and down on its own.

[0024] Specifically, this solution also includes a rescue platform 5, and the telescopic device includes several connecting plates 6. Each connecting plate 6 corresponds to a telescopic tube 2. Any connecting plate 6 is rotatably mounted on the top outer wall of the corresponding telescopic tube 2. The connecting plates 6 matched with the telescopic tubes 2 with inner diameters decreasing from large to small are arranged sequentially from bottom to top. Adjacent connecting plates 6 are fitted together in their initial positions. The rescue platform 5 is connected to the topmost connecting plate 6. By providing several connecting plates 6, since any connecting plate 6 is mounted on the top outer wall of the corresponding telescopic tube 2, and the connecting plates 6 matched with the telescopic tubes 2 with inner diameters decreasing from large to small are arranged sequentially from bottom to top, and the connecting plates 6 are fitted together in their initial positions, when the secondary telescopic tube moves up and down, due to the connecting plates 6 connected to the secondary telescopic tube, the remaining telescopic tubes 2 located in the secondary telescopic tube will also move up and down, ultimately realizing the raising or lowering of the rescue platform 5. It is worth noting that when the main telescopic tube rotates in the opposite direction, the secondary telescopic tube moves to the bottom first, until the connecting plate 6 connected to the secondary telescopic tube and the connecting plate 6 connected to the main telescopic tube come into contact. Due to the friction generated when the two connecting plates 6 come into contact, the secondary telescopic tube and the main telescopic tube eventually rotate together. This process continues until the remaining telescopic tubes 2 achieve a downward movement.

[0025] As can be seen from the above embodiments, the telescopic device converts the lifting motion of the corresponding telescopic tube 2 into a rotating motion only when the driving block 3 engages with the corresponding telescopic tube 2 to the position where the telescopic thread of the telescopic tube 2 is damaged. However, in reality, when the driving block 3 engages with the position where the telescopic thread of the corresponding telescopic tube 2 is damaged, the driving block 3 needs to continue rotating to drive the corresponding telescopic tube 2 to rotate synchronously. During this process, the driving thread of the driving block 3 will also be damaged, thereby reducing the service life of the driving block 3. Based on this, in order to extend the service life of the driving block 3, the driving block 3 in this solution is provided with a telescopic slot 301, and the driving block 3 is matched with a driving rod 7, which is telescopically disposed in the telescopic slot 301. The inner side of the telescopic tube 2 has a limiting slot 201. Several drive rods 7 are matched one-to-one with several limiting slots 201. Any drive rod 7 can lock or release its coaxial engagement with the corresponding limiting slot 201. With the drive rod 7, the drive rod 7 can be telescopically installed in the telescopic slot 301. Under normal conditions, the drive rod 7 is retracted in the telescopic slot 301. When the telescopic device is working, if the telescopic thread of any telescopic tube 2 is damaged, the drive block 3 will control the telescopic tube 2 to move up and down until the limiting slot 201 of the telescopic tube 2 is facing the telescopic slot 301. At this time, the drive rod 7 is extended and inserted into the limiting slot 201, so that the drive block 3 and the telescopic tube 2 rotate together. By providing the drive rod 7, even if the abutting block 4 and the drive block 3 are not in contact, the drive block 3 and the corresponding telescopic tube 2 can still rotate together. This prevents the drive thread of the drive block 3 from engaging with the telescopic thread of the telescopic tube 2, thus protecting the drive block 3 and extending its service life.

[0026] It is worth noting that, due to the size limitations of the actual drive block 3, the ratio of the size of the actual drive rod 7 to the size of the telescopic tube 2 is too small. Based on this, in this scheme, several drive rods 7 are matched and arranged on the same drive block 3, and the several drive rods 7 are arranged at equal intervals along the central axis of the drive block 3.

[0027] Furthermore, in order to achieve the maximum usable length of the telescopic tube 2, when the telescopic thread of any telescopic tube 2 is damaged, this solution provides several limiting slots 201 on the same telescopic tube 2. The several limiting slots 201 are equally spaced on the telescopic tube 2 along the axial direction of the telescopic tube 2. It is worth noting that the drive rod 7 cooperates with the limiting slot 201 closest to the position of the telescopic thread that has been damaged on the telescopic tube 2.

[0028] As described in the above embodiments, the function of the drive rod 7 is to extend into the limiting slot 201, thereby enabling the drive block 3 to drive the corresponding telescopic tube 2 to rotate. However, it is worth noting that due to the size limitation of the drive block 3, the size of the drive rod 7 cannot be designed to be too large, resulting in a large mass difference between the telescopic tube 2 and the drive rod 7. When the drive rod 7 drives the telescopic tube 2 to rotate, it will inevitably cause the drive rod 7 to deform to varying degrees. In order to avoid the deformation of the drive rod 7 affecting the structure of the drive thread of the drive block 3, this solution uses a drive block 3... A sliding groove 302 is provided inside, which communicates with the telescopic slot 301. The axial direction of the sliding groove 302 is the same as the axial direction of the telescopic slot 301. The driving block 3 is also matched with a sliding connecting block 8, which is connected to the driving rod 7. The distance between the sliding groove 302 and the inner sidewall of the driving block 3 is greater than 3cm. By providing the connecting block 8, the connecting block 8 can slide along the axial direction of the sliding groove 302, thereby realizing the extension and retraction of the driving rod 7 along the axial direction of the telescopic slot 301. At the same time, it should be noted that this... The outer diameter of the drive rod 7 is smaller than the inner diameter of the telescopic slot 301; the width of the connecting block 8 is equal to the width of the sliding groove 302. With this design, when the drive rod 7 rotates the telescopic tube 2, the rotational resistance of the telescopic tube 2 is transmitted through the drive rod 7 to the connecting block 8, and then through the connecting block 8 to the sliding groove 302 of the drive block 3. Therefore, during the rotation of the telescopic tube 2, the drive rod 7, being the first to be affected, will undergo significant deformation, but the structure of the drive rod 7 will not break and it can still function normally. During use, the sliding grooves 302 of both the connecting block 8 and the driving block 3 will deform to varying degrees, but the connecting block 8 can still slide normally on the sliding groove 302. Since the outer diameter of the driving rod 7 is smaller than the inner diameter of the telescopic slot 301, even if the driving rod 7 deforms, it will not directly contact the driving thread on the driving block 3. Similarly, since the minimum distance between the sliding groove 302 and the inner wall of the driving block 3 is greater than 3cm, this setting ensures that the deformation of the sliding groove 302 will not affect the driving thread structure of the driving block 3.

[0029] Specifically, in order to achieve the sliding of the drive rod 7, this solution also includes a hydraulic system 9 and a hydraulic rod 10. A hydraulic slot 303 is also provided in the drive block 3. The hydraulic rod 10 is slidably disposed in the hydraulic slot 303. The hydraulic rod 10 is connected to the drive rod 7. The hydraulic system 9 is disposed in the drive block 3 and is used to drive the hydraulic rod 10 to slide. This solution achieves the sliding of the drive rod 7 by setting up the hydraulic system 9, which is used to control the sliding of the hydraulic rod 10. Since the hydraulic rod 10 is connected to the drive rod 7, the sliding of the drive rod 7 is thus realized.

[0030] It is worth noting that the hydraulic system 9 of this solution includes a hydraulic tank 901 filled with hydraulic oil, an inlet hydraulic pump 902, and an inlet valve. The hydraulic tank 901 is located at the bottom of the corresponding drive block 3, and the inlet hydraulic pump 902 is located at the bottom of the corresponding drive block 3. The drive block 3 has an inlet slot 306, which is connected to the hydraulic slot 303. In this solution, the space between the bottom surface of the hydraulic rod 10 and the hydraulic slot 303 is defined as the inlet space 304. The connection between the inlet slot 306 and the hydraulic slot 303 is located in the inlet space 304. The two ends of the inlet hydraulic pump 902 are connected to the hydraulic tank 901 and the inlet slot 306, respectively. By setting the inlet hydraulic pump 902, the hydraulic oil in the hydraulic tank 901 enters the inlet space 304, thereby enabling the extension and sliding of the hydraulic rod 10. The inlet valve seal is located at the connection between the oil inlet slot 306 and the hydraulic slot 303 to ensure the smooth operation of the hydraulic system 9.

[0031] In addition, the hydraulic system 9 of this solution also includes a return hydraulic pump 903, a sealing block 904, and a return valve. The hydraulic rod 10 has a sealing groove, and the sealing block 904 is sealed in the sealing groove. The sealing block 904, the hydraulic rod 10, and the drive block 3 together form a return space 305. The drive block 3 also has a return groove 307, which is connected to the return space 305. The return hydraulic pump 903 is located at the bottom of the corresponding drive block 3, and its two ends are connected to the hydraulic tank 901 and the return groove 307, respectively. By setting up the return hydraulic pump 903, the hydraulic oil in the hydraulic tank 901 enters the return space 305, realizing the retraction and sliding of the hydraulic rod 10. The return valve is sealed at the connection between the return groove 307 and the return space 305 to ensure the smooth operation of the hydraulic system 9.

[0032] As described in the above embodiments, when the drive rod 7 abuts against the telescopic tube 2 and controls the rotation of the telescopic tube 2, it will deform. Since the outer diameter of the drive rod 7 is smaller than the inner diameter of the telescopic slot 301, the drive rod 7 may shift as a whole. Because the hydraulic rod 10 is connected to the drive rod 7, the hydraulic rod 10 will deform due to the shift of the drive rod 7. Furthermore, the hydraulic rod 10 is driven by the hydraulic system 9, which requires ensuring a sealed installation between the hydraulic rod 10 and the drive block 3. When the structure of the hydraulic rod 10 deforms, it can easily cause damage to the hydraulic system 9. In response to the issue of leakage, this solution further includes a connecting rod 11 and a pushing rod 12. A pushing slot 701 is provided at one end of the drive rod 7 near the hydraulic rod 10, with the axis of the pushing slot 701 parallel to the axis of the drive rod 7. The pushing rod 12 is slidably disposed within the pushing slot 701, with its axis perpendicular to the axis of the pushing slot 701. Both ends of the connecting rod 11 are connected to the pushing rod 12 and the hydraulic rod 10, respectively. This solution achieves the connection between the hydraulic rod 10 and the drive rod 7 by providing the connecting rod 11 and the pushing rod 12. It is worth noting that the length of the push slot 701 in this design is greater than the diameter of the push rod 12. The space of the push slot 701 can be divided into an extension space 702, a dwell space 703, and a retraction space 704 along the axial direction of the push slot 701. When the hydraulic rod 10 slides, it will drive the push rod 12 to slide, resulting in the following two situations: When the push rod 12 moves to the extension space 702, the push rod 12 abuts against the left end face of the push slot 701. At this time, the hydraulic rod 10 extends and slides, which will control the drive rod 7 to extend out of the telescopic slot 301. When the push rod 12 moves to the retraction space 704, the push rod 12 abuts against the right end face of the push slot 701. At this time, the hydraulic rod 10 retracts and slides, which will control the drive rod 7 to retract back into the telescopic slot 301. After the push rod 12 completes the push of the drive rod 7, the hydraulic rod 10 needs to control the push rod 12 to stay in the dwell space 703. At this time, there is no direct contact between the push rod 12 and the drive rod 7. When the push rod 12 is in the dwell space 703, the distance between the push rod 12 and the drive rod 7 is greater than the maximum displacement of the drive rod 7. This setting ensures that even if the drive rod 7 deforms, the deformed drive rod 7 will not directly contact the push rod 12, thus avoiding damage to the structure of the hydraulic rod 10 when the drive rod 7 deforms, which would affect the sealing between the hydraulic rod 10 and the drive block 3 and cause leakage in the hydraulic system 9.

[0033] Similarly, it is worth noting that the outer wall of the telescopic tube 2 is provided with a limiting slot 201, and the outer wall of the telescopic tube 2 is also provided with a telescopic thread. Therefore, the limiting slot 201 and the telescopic thread are interconnected. There is a problem that when the driving rod 7 is inserted into the limiting slot 201, structural deformation occurs at the connection between the limiting slot 201 and the telescopic thread of the telescopic tube 2. To address this, the limiting slot 201 in this solution includes a coaxially connected equal-diameter slot 2011 and an enlarged slot 2012. The equal-diameter slot 2011 is located inside the telescopic tube 2, while the two ends of the enlarged slot 2012 are connected to the equal-diameter slot 2011 and the outer wall of the telescopic tube 2, respectively. The inner diameter of the equal-diameter slot 2011 is equal to the outer diameter of the driving rod 7. The enlarged slot 2012 extends along the equal-diameter slot 2011. The axial direction of 011 gradually decreases from the direction closest to the equal-diameter slot 2011. The minimum inner diameter of the enlarged slot 2012 is equal to the inner diameter of the equal-diameter slot 2011. By setting the equal-diameter slot 2011 and the enlarged slot 2012, when the drive rod 7 is inserted into the limiting slot 201, it is actually inserted into the equal-diameter slot 2011. The drive rod 7 does not directly contact the enlarged slot 2012, and the length of the enlarged slot 2012 is greater than 3cm. This setting ensures that when the drive rod 7 abuts against the equal-diameter slot 2011, even if the inner wall of the equal-diameter slot 2011 deforms during rotation, the distance between the equal-diameter slot 2011 and the telescopic thread is too far, so the telescopic thread will not deform, thus achieving the purpose of protecting the telescopic thread.

[0034] Furthermore, to achieve the rotation of the telescopic tube 2 with the largest inner diameter, this solution also includes a transmission device 13. The transmission device 13 includes a transmission motor 1301, a rotating plate 1302, and a reduction assembly. The transmission motor 1301 is mounted on the moving platform 1, and a rotating slot is provided on the surface of the moving platform 1. The rotating plate 1302 is rotatably mounted on the rotating slot, and the telescopic tube 2 with the largest inner diameter is coaxially mounted on the rotating plate 1302. The reduction assembly is located inside the moving platform 1, and its two ends are coaxially connected to the output ends of the rotating plate 1302 and the transmission motor 1301, respectively. With the transmission motor 1301 installed, when the output end of the transmission motor 1301 starts to rotate, the transmission motor 1301 will control the reduction assembly to start rotating, thereby driving the rotating plate 1302 to rotate, ultimately achieving the rotation of the telescopic tube 2 with the largest inner diameter.

[0035] Specifically, the reduction assembly of this solution includes a rotating shaft 1303, a rotating gear 1304, a reduction shaft 1305, a reduction gear 1306, an input gear 1307, and an output gear 1308. The rotating shaft 1303 is vertically arranged inside the moving platform 1 and is coaxially connected to the rotating plate 1302. The rotating gear 1304 is coaxially sleeved on the bottom end of the rotating shaft 1303. The reduction shaft 1305 is rotatably arranged inside the moving platform 1. The output gear 1308 and the reduction gear 1306 are coaxially sleeved on both ends of the reduction shaft 1305, respectively. 1306 is meshed with the rotating gear 1304, and the input gear 1307 is coaxially sleeved on the output end of the transmission motor 1301. The input gear 1307 and the output gear 1308 are meshed together. With the deceleration assembly, when the transmission motor 1301 rotates, it controls the input gear 1307 to rotate, which in turn drives the output gear 1308 to rotate. Then, after the deceleration shaft 1305 realizes the rotation of the deceleration gear 1306, the rotating gear 1304 rotates, and finally realizes the rotation of the telescopic tube 2 with the maximum inner diameter.

[0036] In addition, it includes two sets of auxiliary components 14, which are symmetrically arranged on both sides of the mobile platform 1. Each auxiliary component 14 includes several auxiliary rods 1401 and several auxiliary blocks 1402. The auxiliary rods 1401 are equally spaced and vertically located on the mobile platform 1 along the axis of the mobile platform 1. There is a sliding space between two adjacent auxiliary rods 1401. Each sliding space corresponds to one of the auxiliary blocks 1402. One end of any auxiliary block 1402 is slidably set on the auxiliary rod 1401, and the other end of the auxiliary block 1402 is connected to another auxiliary rod 1401. The auxiliary rod 1401 furthest from the telescopic tube 2 is fixedly connected to the mobile platform 1, and the auxiliary rod 1401 closest to the telescopic tube 2 is connected to the rescue platform 5. By setting the auxiliary components 14, the stability of the rescue platform 5 during lifting can be further enhanced.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A ladder truck device for rescue and disaster relief, characterized in that: The device includes a mobile platform and a telescopic device. The telescopic device includes several hollow telescopic tubes and several drive blocks. The inner diameters of the telescopic tubes are different from each other. The telescopic tubes are coaxially fitted together according to their respective inner diameters from small to large. There is a drive space between two adjacent telescopic tubes. The drive spaces correspond one-to-one with the drive blocks. Any drive block is set in the corresponding drive space. The drive block is coaxially connected to the telescopic tube with the larger inner diameter. The inner sidewall of the drive block is engaged with the telescopic tube with the smaller inner diameter. The telescopic tube with the largest inner diameter is rotatably mounted on the mobile platform. The telescopic device also includes several abutment blocks, which correspond one-to-one with several driving spaces. Each abutment block is set in the corresponding driving space. The abutment block is coaxially set at the bottom of the outer wall of the telescopic tube with a small inner diameter. The abutment block can lock or release its abutment relationship with the corresponding driving block.

2. The ladder device for rescue and disaster relief according to claim 1, characterized in that: The meshing connection between the telescopic tube and the drive block has a self-locking capability.

3. The ladder device for rescue and disaster relief according to claim 1, characterized in that: It also includes a rescue platform. The telescopic device also includes several connecting plates, which correspond one-to-one with several telescopic tubes. Each connecting plate is rotatably mounted on the top outer wall of the corresponding telescopic tube. The connecting plates matching the telescopic tubes with inner diameters from large to small are arranged sequentially from bottom to top. Adjacent connecting plates are fitted together in the initial position. The rescue platform is connected to the topmost connecting plate.

4. A ladder device for rescue and disaster relief according to claim 1, characterized in that: The drive block has a telescopic slot, and a drive rod is matched to the drive block. The drive rod is telescopically disposed in the telescopic slot. The outer wall of the telescopic tube has a limiting slot. Several drive rods are matched one-to-one with several limiting slots. Any drive rod can lock or release its coaxial engagement with the corresponding limiting slot.

5. A ladder device for rescue and disaster relief according to claim 4, characterized in that: The same telescopic tube has a plurality of limiting slots, which are equally spaced along the axial direction of the telescopic tube.

6. A ladder device for rescue and disaster relief according to claim 4, characterized in that: The drive block is also provided with a sliding groove, which is connected to the telescopic slot hole. The axial direction of the sliding groove is the same as that of the telescopic slot hole. The drive block is also matched with a sliding connecting block, which is connected to the drive rod. The minimum distance between the sliding groove and the inner sidewall of the drive block is greater than 3cm.

7. A ladder device for rescue and disaster relief according to claim 6, characterized in that: The outer diameter of the drive rod is smaller than the inner diameter of the telescopic slot; the width of the connecting block is equal to the width of the sliding groove.

8. A ladder device for rescue and disaster relief according to claim 4, characterized in that: It also includes a hydraulic system and a hydraulic rod. The drive block is provided with a hydraulic slot, and the hydraulic rod is slidably disposed in the hydraulic slot. The hydraulic rod is connected to the drive rod. The hydraulic system is disposed in the drive block and is used to drive the hydraulic rod to slide.

9. A ladder device for rescue and disaster relief according to claim 8, characterized in that: It also includes a connecting rod and a pushing rod. The driving rod has a pushing slot at one end near the hydraulic rod. The axis of the pushing slot is parallel to the axis of the driving rod. The pushing rod is slidably disposed in the pushing slot. The axis of the pushing rod is perpendicular to the axis of the pushing slot. The connecting rod is connected to the pushing rod and the hydraulic rod respectively.

10. A ladder device for rescue and disaster relief according to claim 9, characterized in that: The push slot is divided into an extension space, a dwell space, and a retraction space along its axial direction. When the push rod moves to the extension space, it abuts against the left end face of the push slot. When the push rod moves to the retraction space, it abuts against the right end face of the push slot. When the push rod moves to the dwell space, it releases its abutment against the push slot.

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