A ladder lifting mechanism for a fire truck specially used for high-altitude rescue
By designing a support rod structure and locking assembly that allocates gravity in a special fire truck for high altitude rescue, the problem of unstable ladder structure is solved, extending the life of the lifting cylinder and improving the safety of the fire truck.
Patent Information
- Application Number
- CN202011595617.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-12-29
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2040-12-29
AI Technical Summary
The existing high-altitude special fire rescue vehicle has a rotating ladder structure with a limited load bearing capacity of a single group of lifting cylinders, resulting in a short service life and unstable service life, which may cause casualties.
Design a special fire truck ladder lifting mechanism for high-altitude rescue, which can share gravity through the first pole, the second pole and the third pole to reduce the load on the lifting cylinder, and improve structural stability through locking components and reinforcement plates. and security.
It extends the service life of the lifting cylinder, enhances the stability and safety of the uphill structure, reduces shaking, and improves the overall safety of the fire truck.
Smart Images
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Figure HDA0002866906580000021
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of fire trucks, and in particular to a ladder lifting mechanism for a special fire truck for high-altitude rescue. Technical Background
[0002] With the continuous development of my country's economy, the population is growing year by year. In order to improve land utilization, various high-rise buildings are being built more and more. While increasing land utilization, high-rise buildings also bring many safety hazards, such as fire. Once a fire accident occurs, it is difficult to extinguish the fire and rescue personnel in a high-rise building, and ordinary fire trucks are difficult to achieve rescue results. A high-altitude special fire rescue vehicle is a fire truck specially designed for high-altitude rescue. It can meet the needs of high-altitude fire fighting and rescue, and reduce property losses and casualties.
[0003] In the prior art, the invention patent with application number CN110237466A discloses a high-altitude special fire rescue vehicle, including a chassis, a rotating platform, a lifting platform, an upper ladder structure, a lower ladder structure and a top platform. A subframe is installed on the chassis; the rotating platform is placed on the subframe, and the two rely on the rotating mechanism to achieve left and right rotation; the lifting platform is lifted by the platform lifting hydraulic cylinder and the lifting platform scissor frame on the rotating platform, the bottom end of the upper ladder lifting cylinder is fixed on the lifting platform, and the upper ladder lifting and retracting ladder and the upper ladder rotating ladder are folded or linearly connected; the lower ladder structure is placed in the lifting platform or extends out of the lifting platform, and the lower ladder rotating ladder and the lower ladder lifting and retracting ladder are folded or linearly connected; the top platform is placed at the front end of the upper ladder lifting and retracting ladder, and a fire cannon is provided. The above invention has the following advantages: the ladder frame can rotate 140° left and right, and has high adaptability to the on-site environment; the number of people evacuated per unit time is large, and the carrying capacity is strong; the whole vehicle has a high degree of integration; and the automation and safety are high.
[0004] The above-mentioned prior art has the following disadvantages: the lifting and lowering of the upper ladder rotating ladder and the upper ladder telescopic ladder are controlled by the upper ladder lifting cylinder, and the weight of the upper ladder rotating ladder and the upper ladder telescopic ladder is only borne by the upper ladder lifting cylinder. The load-bearing capacity of a single set of upper ladder lifting cylinders is limited, and the service life of the upper ladder lifting cylinder will be shortened due to the load; at the same time, only the upper ladder lifting cylinder is supported, and the stability of the upper ladder structure is not good and it is easy to shake. Especially when there are many rescue personnel, the instability of the upper ladder structure may cause unnecessary casualties. Summary of the invention
[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a ladder frame lifting mechanism for a special fire truck for high-altitude rescue, which can support the ladder frame and share the load of the ladder lifting cylinder, and has the technical effect of enhancing the safety of the ladder frame and increasing the stability of the ladder frame.
[0006] The above-mentioned object of the present invention is achieved through the following technical solutions:
[0007] A lifting mechanism for a ladder frame of a special fire truck for high-altitude rescue, comprising a frame body, the frame body comprising a first support rod, a second support rod parallel to the first support rod, and a horizontal slide seat rotatably connected to the bottom of the first support rod and the second support rod; a lifting cylinder is connected to the middle position of a side of the first support rod away from the second support rod, and a telescopic rod of the lifting cylinder is rotatably connected to the first support rod; a third support rod is rotatably connected to a side of the first support rod away from the second support rod, and a locking assembly is provided on the horizontal slide seat to control the sliding of the horizontal slide seat.
[0008] By adopting the above technical solution, the cylinder body of the lifting cylinder and the bottom end of the third support rod are rotatably connected to the lifting platform, the horizontal slide is slidably connected to the lifting platform, and the locking assembly can lock the horizontal slide on the lifting platform. When the fire truck is in standby mode, the horizontal slide is farthest from the lower end of the lifting cylinder, the length of the lifting cylinder is the shortest, and the frame is in a folded shape; when the fire truck is in use, the distance between the horizontal slide and the lifting cylinder is adjusted according to the height of the building. The higher the building, the closer the horizontal slide is to the lifting cylinder. After the locking assembly is locked, the longer the lifting cylinder is extended, the higher the height of the upper ladder structure and the steeper the slope; the shorter the lifting cylinder is extended, the lower the height of the upper ladder structure and the gentler the slope.
[0009] The gravity of the upper ladder structure is distributed among the lifting cylinder, the first support rod, the second support rod and the third support rod, which reduces the load on the lifting cylinder, reduces the wear of the lifting cylinder and extends the service life of the lifting cylinder; the first support rod and the second support rod increase the stress points of the upper ladder structure, making the upper ladder structure more stable, reducing shaking and increasing safety.
[0010] Furthermore, the first support rod, the second support rod, the lifting cylinder and the horizontal slide are each provided in at least two groups.
[0011] By adopting the above technical solution, two or more groups of frames can make the frames bear force more evenly.
[0012] Furthermore, a cross bar is fixedly connected between two adjacent first support rods.
[0013] By adopting the above technical solution, the cross bar can increase the stability of the first support rod and prevent the first support rod from being deformed due to bearing weight; at the same time, the cross bar can make two adjacent groups of first support rods move synchronously to keep the upper platform level.
[0014] Furthermore, the locking assembly includes a bar tooth plate, a positioning cylinder and a locking plate, the cylinder body of the positioning cylinder is rotatably connected to the horizontal slide, the telescopic rod of the positioning cylinder is rotatably connected to the locking plate, the bar tooth plate is meshed with the locking plate, and the end of the locking plate is rotatably connected to the horizontal slide through a pin shaft; the telescopic rod of the positioning cylinder drives the locking plate to rotate around the pin shaft when extending and retracting.
[0015] By adopting the above technical solution, the strip tooth plate is fixedly connected to the lifting platform. When the positioning cylinder is shortened, the locking plate is meshed with the strip tooth plate, and the horizontal slide is fixed to the strip tooth plate; when the positioning cylinder is extended, the locking plate rotates around the pin shaft and leaves the strip tooth plate, and the horizontal slide can slide. According to the height of the building, the locking plate is fixed to the corresponding position of the strip tooth plate. At this time, the lifting cylinder can be extended and retracted to achieve the lifting and lowering of the upper ladder structure. When the use is completed, the locking plate releases the strip tooth plate, and the lifting cylinder is shortened to the shortest position. At this time, the horizontal angle between the first support rod, the second support rod, the third support rod and the lifting cylinder is the smallest, the occupied space is the smallest, and the upper ladder structure is in the lowest state.
[0016] Furthermore, the frame is made of stainless steel.
[0017] By adopting the above technical solution, the stainless steel material can avoid the occurrence of rust problems and has a long service life.
[0018] Furthermore, the first support rod is square steel, and the second support rod and the third support rod are round steel pipes.
[0019] By adopting the above technical solution, the strength of square steel and round steel pipe is different, and the combination of the two structures can achieve a better supporting effect.
[0020] Furthermore, a reinforcement plate is fixedly connected to the position of the first support rod where the lifting cylinder and the third support rod are connected.
[0021] By adopting the above technical solution, the fulcrum of the lifting cylinder and the third support rod is the position where the first support rod is most likely to bend. The reinforcement plate can increase the strength of the first support rod, prevent the first support rod from bending, and extend the life of the first support rod.
[0022] Furthermore, the reinforcement plate is provided with a plurality of small holes.
[0023] By adopting the above technical solution, the small hole can reduce the weight of the first support rod without reducing the strength, reduce the amount of material used, and save costs.
[0024] In summary, the present invention includes at least one of the following beneficial technical effects:
[0025] 1. The gravity of the upper ladder structure is distributed on the lifting cylinder, the first support rod, the second support rod and the third support rod, which reduces the load of the lifting cylinder, reduces the loss of the lifting cylinder and prolongs the service life of the lifting cylinder; the first support rod and the second support rod increase the stress points of the upper ladder structure, making the upper ladder structure more stable, reducing shaking and increasing safety;
[0026] 2. The fulcrum of the lifting cylinder and the third support rod is the position where the first support rod is most likely to bend. The reinforcement plate can increase the strength of the first support rod, prevent the first support rod from bending, and extend the life of the first support rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of the overall structure of the embodiment;
[0028] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part A.
[0029] In the figure, 1, the first support rod; 11, the reinforcement plate; 12, the small hole; 2, the second support rod; 3, the third support rod; 4, the horizontal slide; 5, the locking assembly; 51, the bar tooth plate; 52, the positioning cylinder; 53, the locking plate; 6, the lifting cylinder; 7, the cross bar. DETAILED DESCRIPTION
[0030] The present invention is further described in detail below in conjunction with the accompanying drawings.
[0031] Example 1
[0032] Reference Figure 1 , which is a special ladder lifting mechanism for a high-altitude rescue fire truck disclosed in the present invention, comprising two sets of stainless steel frames of the same structure, each set of frames comprising a horizontal slide 4, a locking assembly 5, a first support rod 1, a second support rod 2, a third support rod 3 and a lifting cylinder 6; the upper ends of the lifting cylinder 6 and the third support rod 3 are rotatably connected to the middle position of the first support rod 1 away from the second support rod 2. The lower ends of the first support rod 1 and the second support rod 2 are rotatably connected to the two ends of the horizontal slide 4 respectively, the first support rod 1 and the second support rod 2 are parallel to each other, the first support rod 1 is square steel, and the second support rod 2 and the third support rod 3 are round steel pipes.
[0033] Reference Figure 1 By adopting the present frame, the gravity of the upper ladder structure in the prior art will be distributed on the lifting cylinder 6, the first support rod 1, the second support rod 2 and the third support rod 3, thereby reducing the load on the lifting cylinder 6, reducing the driving hydraulic oil pressure, reducing the loss of the lifting cylinder 6, and extending the service life of the lifting cylinder 6; the first support rod 1 and the second support rod 2 increase the stress points of the upper ladder structure, making the upper ladder structure more stable, reducing shaking, and increasing safety.
[0034] Reference Figure 1 and Figure 2The locking assembly 5 can not only fix the upper ladder structure, but also conveniently adjust the height of the upper ladder structure. The locking assembly 5 includes a bar-shaped toothed plate 51, a positioning cylinder 52 and a locking plate 53. The cylinder body of the positioning cylinder 52 is rotatably connected to the horizontal slide 4. The telescopic rod of the positioning cylinder 52 is rotatably connected to the locking plate 53. The bar-shaped toothed plate 51 is meshed with the locking plate 53. The end of the locking plate 53 is rotatably connected to the horizontal slide 4 through a pin shaft. The telescopic rod of the positioning cylinder 52 drives the locking plate 53 to rotate around the pin shaft when it is extended or retracted.
[0035] Reference Figure 1 and Figure 2 The strip tooth plate 51 is fixedly connected to the lifting platform. When the positioning cylinder 52 is shortened, the locking plate 53 is engaged with the strip tooth plate 51, and the horizontal slide 4 is fixed with the strip tooth plate 51. When the positioning cylinder 52 is extended, the locking plate 53 rotates around the pin and leaves the strip tooth plate 51, and the horizontal slide 4 can automatically slide forward and backward in cooperation with the drive of the lifting cylinder 6.
[0036] Reference Figure 1 and Figure 2 When the fire truck is in standby state, the locking plate 53 is farthest from the lower end of the lifting cylinder 6, the length of the lifting cylinder 6 is the shortest, and the frame is in a folded shape; when the fire truck is in use, the locking position of the locking plate 53 on the bar tooth plate 51 is adjusted according to the height of the building. The higher the building, the closer the locking plate 53 is to the side of the lifting cylinder 6.
[0037] Reference Figure 1 and Figure 2 According to the height of the building, the locking plate 53 is fixed to the corresponding position of the strip tooth plate 51, and the lifting cylinder 6 is extended and retracted to realize the lifting and lowering of the upper ladder structure. The longer the lifting cylinder 6 is extended, the higher the height of the upper ladder structure is and the steeper the slope is; the shorter the lifting cylinder 6 is extended, the lower the height of the upper ladder structure is and the gentler the slope is.
[0038] Reference Figure 1 and Figure 2 When the use is completed, the locking plate 53 releases the strip tooth plate 51, the lifting cylinder 6 is shortened, and the horizontal slide 4 slides toward the end away from the bottom of the lifting cylinder 6. The horizontal angle between the first support rod 1, the second support rod 2, the third support rod 3 and the lifting cylinder 6 is the smallest, and the locking plate 53 is farthest from the lower end of the lifting cylinder 6. At this time, the occupied space is the smallest, and the upper ladder structure is in the lowest state.
[0039] Reference Figure 1 In order to strengthen the stability of the first support rod 1 and prevent the first support rod 1 from bending and deformation, on the one hand, a cross bar 7 is fixedly connected between two adjacent first support rods 1. The cross bar 7 can also make the two adjacent groups of first support rods 1 move synchronously to keep the upper platform level.
[0040] Reference Figure 1The lifting cylinder 6 and the third support rod 3 on the first support rod 1 are the most likely positions for the first support rod 1 to bend, so a reinforcing plate 11 is fixedly connected to the first support rod 1 at the position where the lifting cylinder 6 and the third support rod 3 are connected. In order to reduce the weight of the first support rod 1 and save costs, a plurality of small holes 12 are opened on the reinforcing plate 11.
[0041] Example 2
[0042] The difference from Example 1 is that each lifting mechanism includes three sets of frames.
[0043] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A ladder frame lifting mechanism for a high-altitude rescue fire truck, comprising a frame body, characterized in that: The frame comprises a first support rod (1), a second support rod (2) parallel to the first support rod (1), and a horizontal slide seat (4) rotatably connected to the bottom of the first support rod (1) and the second support rod (2); a lifting cylinder (6) is connected to the middle position of the side of the first support rod (1) away from the second support rod (2), and the telescopic rod of the lifting cylinder (6) is rotatably connected to the first support rod (1); a third support rod (3) is rotatably connected to the side of the first support rod (1) away from the second support rod (2), and a locking assembly (5) is provided on the horizontal slide seat (4) for controlling the sliding of the horizontal slide seat (4), so that the first support rod (1), the second support rod (2) and the lifting cylinder (6) can be locked. The oil cylinder (6) and the horizontal slide (4) are both provided with at least two groups, a cross bar (7) is connected between two adjacent first support rods (1), the locking assembly (5) comprises a bar tooth plate (51), a positioning cylinder (52) and a locking plate (53), the cylinder body of the positioning cylinder (52) is rotatably connected to the horizontal slide (4), the telescopic rod of the positioning cylinder (52) is rotatably connected to the locking plate (53), the bar tooth plate (51) is meshed with the locking plate (53), and the end of the locking plate (53) is rotatably connected to the horizontal slide (4) through a pin shaft; the telescopic rod of the positioning cylinder (52) drives the locking plate (53) to rotate around the pin shaft when it is extended or retracted.
2. The ladder lifting mechanism for a high-altitude rescue fire truck according to claim 1 is characterized in that: A cross bar (7) is fixedly connected between two adjacent first support bars (1).
3. The ladder lifting mechanism for a high-altitude rescue fire truck according to claim 1 is characterized in that: The frame is made of stainless steel.
4. The ladder lifting mechanism for a high-altitude rescue fire truck according to claim 1 is characterized in that: The first support rod (1) is made of square steel, and the second support rod (2) and the third support rod (3) are round steel pipes.
5. The ladder lifting mechanism for a high-altitude rescue fire truck according to claim 1 is characterized in that: A reinforcing plate (11) is fixedly connected to the first support rod (1) at the position where the lifting cylinder (6) and the third support rod (3) are connected.
6. The ladder lifting mechanism for a high-altitude rescue fire truck according to claim 5, characterized in that: The reinforcing plate (11) is provided with a plurality of small holes (12).