Climbing fire fighting truck and supporting leg telescopic device thereof
By setting up patch boards, extrusion blocks, rollers and rope structures on the legs of the fire truck, combined with pressure sensors, the problems of large weight, unstable expansion and cumbersome operation in the existing technology are solved, and a stable, safe and convenient expansion and contraction effect of the legs is achieved.
Patent Information
- Application Number
- CN202422809781.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The leg structure of the existing high-rise fire truck has a large weight and complex structure, making it difficult to ensure the strength of each position, lacks real-time stress monitoring, cumbersome telescopic operation, and there is a risk of suspension, which affects the safety and efficiency of operations.
A leg telescopic device including a leg box, a first leg, a second leg, a first oil cylinder, and a pressure sensor is designed. By setting a clipboard at the bottom of the leg box and a pressing block at the top, stable telescopic is achieved using rollers and rope structures, and the force is monitored in real time through the pressure sensor to ensure the correct bearing capacity of the oil cylinder.
The stability and smooth expansion of the legs are achieved, the disassembly and assembly process is simplified, the reliability and safety of the device are ensured, the actual use needs are met, and the operation efficiency and safety are improved.
Smart Images
Figure CN223224314U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fire truck outriggers, in particular to a climbing fire truck and an outrigger telescopic device thereof. Background Art
[0002] A fire truck, also known as a fire truck, is a vehicle designed and manufactured according to needs to be suitable for firefighters to ride, equipped with various fire-fighting equipment or fire extinguishing agents, and used by fire brigades for fire fighting, auxiliary fire fighting or fire rescue. It is usually double-row and equipped with steel ladders, water guns, portable fire extinguishers, respirators, protective clothing, demolition tools, first aid tools and other equipment. Some of them are also equipped with large fire-fighting equipment such as water tanks, water pumps, and foam fire extinguishing devices. There are usually alarm bells, sirens, warning lights and flashing lights on the top of the fire truck. Common types of fire trucks include water tank fire trucks, foam fire trucks, dry powder fire trucks, long-distance water supply fire trucks, climbing fire trucks, ladder climbing fire trucks, etc. The outriggers are an indispensable mechanism in the structure of climbing fire trucks.
[0003] The outrigger system of a high-altitude fire truck mainly includes an outrigger box, a first-level outrigger, a second-level outrigger, a horizontal telescopic oil cylinder, a vertical oil cylinder, and a telescopic rope. In the prior art, the structures on both sides of the outrigger box are of an integral door panel type, which makes the overall structure too heavy. In the field of automobile cranes, the outriggers are always in a fully extended state for lifting operations, while the outriggers of fire trucks need to be able to be extended at all positions. The existing outrigger box bottom reinforcement structure is a box type, which is relatively complex and only considers the strength of the bottom plate in the fully extended state, making it difficult to ensure the strength of the outriggers in all extended positions. Structural strength. In actual use, there is a lack of real-time monitoring of the stress conditions of each leg, which cannot avoid the dangerous state of the legs being suspended in the air, and the safety of the operation is not guaranteed. Moreover, the adjustment pads at the bottom of the first and second legs are of the slider type. The legs have a large sliding resistance when extending or retracting, and the legs will get stuck when retracting. In addition, when disassembling and assembling the horizontal oil cylinder of the existing legs, the legs need to be taken out of the leg box before the oil cylinder can be disassembled. The disassembly and assembly steps are cumbersome, the operation is relatively difficult, and the operation efficiency is affected. In summary, there is an urgent need for a high-altitude fire truck and its leg extension and retraction device. Utility Model Content
[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the utility model provides a climbing fire truck and a leg extension device thereof.
[0005] On the one hand, the present invention provides a leg extension and retraction device for a high-altitude fire truck, wherein the leg extension and retraction device is arranged on the fire truck frame, and comprises a leg box arranged on the fire truck frame, a first leg slidably sleeved in the leg box, a second leg slidably sleeved in the first leg, a first oil cylinder vertically arranged at the free end of the second leg, and a pressure sensor arranged between the first oil cylinder and the second leg, wherein:
[0006] A first support is fixed to one end of the leg box, a second oil cylinder is fixed to the first support, the second oil cylinder includes a push rod connected to the first support and a cylinder sleeved on the outside of the push rod, the cylinder is connected to a first pulley at one end away from the first support, and is connected to a second pulley at the other end, the second pulley is connected to the first leg, a second support is provided at one end of the leg box away from the first support, and a third support is provided at one end of the second leg close to the leg box, the first support and the third support are connected by a first rope, the first rope is wound around the outer circumference of the first pulley, the third support and the second support are connected by a second rope, and the second rope is wound around the outer circumference of the second pulley.
[0007] Furthermore, in the above-mentioned leg extension and retraction device for a high-altitude fire truck, a first roller is provided on the outer side of one end of the first leg close to the first support, and a third roller is provided on the inner side of the other end; a second roller is provided on a side of the second support close to the first leg; the first roller abuts against the inner wall of the leg box, the second roller abuts against the outer periphery of the first leg, and the third roller abuts against the outer periphery of the second leg.
[0008] As a specific implementation, in the above-mentioned outrigger extension and retraction device for a high-altitude fire truck, a plate is provided at the bottom of the outrigger box.
[0009] As a specific implementation, in the above-mentioned outrigger extension and retraction device for a high-altitude fire truck, an extrusion block is provided on the top of one end of the outrigger box away from the first support.
[0010] Furthermore, in the above-mentioned leg extension and retraction device for a high-altitude fire truck, a mounting seat is provided at the middle of one end of the first leg away from the first oil cylinder, and the cylinder barrel is provided in the mounting seat.
[0011] As a specific implementation, in the above-mentioned leg extension and retraction device for a high-altitude fire truck, the first rope and the second rope are both steel ropes.
[0012] As a specific implementation, in the above-mentioned outrigger extension and retraction device for a high-altitude fire truck, a proximity switch is provided at the extrusion block on the top of the outrigger box.
[0013] On the other hand, the present invention also provides a climbing fire truck, which includes the above-mentioned leg extension device.
[0014] The climbing fire truck and its leg extension device of the utility model have the following advantages and positive effects:
[0015] (1) This device provides a support plate at the bottom of the leg box and an extrusion block at the top to ensure that the overall structure of the leg box does not deform during the extension and retraction of the first leg and the second leg, thereby ensuring the reliability and safety of the device as a whole. In addition, by providing rollers between the first leg, the second leg, and the leg box, the extension and retraction of the first leg and the second leg can be made more stable and smooth.
[0016] (2) The device has a simple structure and is easy to assemble and disassemble. It has high smoothness, convenience and reliability through effective weight reduction design and installation structure. By reading the value of the pressure sensor during use, the force applied to the outrigger can be measured in real time, thereby confirming that the first oil cylinder always bears the force correctly and does not leave the ground. It can better meet actual use needs and has good practicality and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only used to further understand the embodiments of the present invention and constitute part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0018] Figure 1 This is a structural diagram of a leg extension device for a high-altitude fire truck according to the present invention;
[0019] Figure 2 This is a structural diagram of a plate in a leg extension device for a high-altitude fire truck according to the present invention;
[0020] Figure 3 This is a structural diagram of a mounting seat in a leg extension device for a high-altitude fire truck according to the present invention;
[0021] Figure 4 It is a schematic diagram of the leg retraction state of the leg of the leg extension device for a climbing fire truck of the present invention.
[0022] Description of reference numerals:
[0023] 1- support leg box, 11- first support, 12- plate, 13- extrusion block, 2- first support leg, 21- second support, 22- first roller, 23- third roller, 24- mounting seat, 3- second support leg, 31- third support, 4- first oil cylinder, 5- pressure sensor, 6- second oil cylinder, 61- push rod, 62- cylinder barrel, 7- first pulley, 71- first rope, 8- second pulley, 81- second rope, 9- proximity switch. DETAILED DESCRIPTION
[0024] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.
[0025] like Figures 1 to 4 As shown, the utility model provides a climbing fire truck and a leg extension device thereof.
[0026] On the one hand, the utility model discloses a leg extension and retraction device for a high-altitude fire truck, which is arranged on a fire truck frame (not shown in the figure), and is characterized in that the leg extension and retraction device includes a leg box 1 arranged on the fire truck frame, a first leg 2 slidably sleeved in the leg box 1, a second leg 3 slidably sleeved in the first leg 2, a first oil cylinder 4 vertically arranged at the free end of the second leg 3, and a pressure sensor 5 arranged between the first oil cylinder 4 and the second leg 3. During use, reading the value of the pressure sensor 5 can measure the force applied to the leg, and then confirm that the first oil cylinder 4 always bears the force correctly and does not leave the ground, wherein a first support 11 is fixed at one end of the leg box 1, a second oil cylinder 6 is fixed to the first support 11, and the second oil cylinder 6 is horizontally arranged in the leg box 1, and the second oil cylinder 6 includes a push rod 61 connected to the first support 11, and a cylinder sleeved on the outside of the push rod 61. The cylinder 62 and the push rod 61 can be freely extended and retracted in the cylinder 62, and the cylinder 62 is connected to the first pulley 7 at one end away from the first support 11. The first pulley 7 is located in the first leg 2 and the second leg 3, and the other end is connected to the second pulley 8. The second pulley 8 is connected to the first leg 2 and is located in the leg box 1. The leg box 1 is provided with a second support 21 at one end away from the first support 11, and the second support 21 is fixedly arranged on the inner side of the bottom of the leg box 1. The second leg 3 is close to the end of the leg box 1 and a third support 31 is provided. The third support 31 is fixedly arranged on the inner side of the bottom of the third support 31. The first support 11 and the third support 31 are connected by a first rope 71, and the first rope 71 is wrapped around and slidably connected to the outer periphery of the first pulley 7 to form a pulley group. The third support 31 and the second support 21 are connected by a second rope 81, and the second rope 81 is wrapped around and slidably connected to the outer periphery of the second pulley 8 to form a pulley group.
[0027] Furthermore, in the leg extension and retraction device for a high-altitude fire truck of the present invention, a first roller 22 is provided on the outer side of the first leg 2 near one end of the first leg 2, and a third roller 23 is provided on the inner side of the other end. A second roller (not shown in the figure) is provided on the side of the second support 21 near the first leg 2. The first roller 22 abuts against the inner wall of the leg box 1, the second roller abuts against the outer periphery of the first leg 2, and the third roller 23 abuts against the outer periphery of the second leg 3. By providing rollers between the first leg 2, the second leg 3, and the leg box 1, the extension and retraction of the first leg 2 and the second leg 3 can be made more stable and smooth.
[0028] As a specific embodiment, in the leg extension and retraction device for a high-altitude fire truck of the present invention, a plate 12 is provided at the bottom of the leg box 1. Such a configuration can ensure that the overall structure of the leg box 1 does not deform during the extension and retraction of the first leg 2 and the second leg 3, thereby ensuring the overall reliability and safety of the device.
[0029] As a specific embodiment, in the leg extension and retraction device for a high-altitude fire truck of the present invention, an extrusion block 13 is provided at the top of the leg box 1 away from the first support 11. Such a setting can ensure that the overall structure of the leg box 1 does not deform during the extension and retraction of the first leg 2 and the second leg 3, thereby ensuring the overall reliability and safety of the device.
[0030] Furthermore, in the leg extension and retraction device for a high-altitude fire truck of the present invention, a mounting seat 24 is provided in the middle of one end of the first leg 2 away from the first oil cylinder 4, and the cylinder barrel 62 is provided in the mounting seat 24. Such an arrangement ensures the stability and safety of the second oil cylinder 6 during the extension and retraction process.
[0031] As a specific embodiment, in the leg extension device for a climbing fire truck of the present invention, the first rope 71 and the second rope 81 are both steel ropes. Of course, the first rope 71 and the second rope 81 can also be made of ropes of other materials and structures, which are not limited here.
[0032] As a specific embodiment, in the leg extension and retraction device for a high-altitude fire truck of the present invention, a proximity switch 9 is provided at the extrusion block 13 at the top of the leg box 1. This is provided so that the proximity switch 9 can be used to detect the change in the distance between the first leg 2 and the leg box 1 during the process of deploying the legs to determine whether it is supported on the ground, thereby ensuring that the legs bear the load.
[0033] Furthermore, in the leg extension and retraction device for a high-altitude fire truck of the present invention, when the second oil cylinder 6 needs to be replaced or inspected, the pin shaft of the first support 11 can be pulled out first, and then the bolts of the cover plates on both sides of the first leg 2 can be loosened, and the second oil cylinder 6 can be taken out along the opening of the leg box 1, which is convenient for disassembly and assembly.
[0034] The working principle of the leg extension device of the utility model for a climbing fire truck is as follows:
[0035] When all the legs need to be extended, the control push rod 61 extends from the cylinder 62, and the cylinder 62 drives the first pulley 7 and the second pulley 8 to move away from the first support 11, and the second pulley 8 then drives the first leg 2 to move away from the first support 11. During this process, the first rope 71 between the first support 11 and the first pulley 7 gradually increases, and the first rope 71 between the third support 31 and the first pulley 7 gradually shortens. The first rope 71 then drives the third support 31 to move away from the first support 11, and the second leg 3 is extended accordingly. During this process, the second rope 81 between the third support 31 and the second pulley 8 gradually increases, and the second rope 81 between the second support 21 and the second pulley 8 gradually shortens, until all the legs are extended.
[0036] When all the legs need to be retracted, the control push rod 61 is retracted into the cylinder 62, and the cylinder 62 drives the first pulley 7 and the second pulley 8 to move toward the first support 11, and the second pulley 8 then drives the first leg 2 to move away from the first support 11. During this process, the second rope 81 between the third support 31 and the second pulley 8 gradually shortens, and the second rope 81 between the second support 21 and the second pulley 8 gradually increases. The second rope 81 then drives the third support 31 to move toward the first support 11, and the second leg 3 retracts accordingly. During this process, the first rope 71 between the first support 11 and the first pulley 7 gradually shortens, and the first rope 71 between the third support 31 and the first pulley 7 gradually increases until the retraction of all the legs is completed.
[0037] On the other hand, the present invention also provides a climbing fire truck, which includes the above-mentioned leg extension device.
[0038] In summary, compared with the prior art, the climbing fire truck and its leg extension device of the utility model have the following advantages and positive effects:
[0039] (1) This device provides a support plate 12 at the bottom of the leg box 1 and an extrusion block 13 at the top, thereby ensuring that the overall structure of the leg box 1 does not deform during the extension and retraction of the first leg 2 and the second leg 3, thereby ensuring the reliability and safety of the device as a whole. In addition, by providing rollers between the first leg 2, the second leg 3, and the leg box 1, the extension and retraction of the first leg 2 and the second leg 3 can be made more stable and smooth.
[0040] (2) The device has a simple structure and is easy to assemble and disassemble. It has high smoothness, convenience and reliability through effective weight reduction design and installation structure. By reading the value of the pressure sensor 5 during use, the force applied to the support leg can be measured in real time, thereby confirming that the first oil cylinder 4 always bears the force correctly and does not leave the ground. It can better meet actual use needs and has good practicality and adaptability.
[0041] It should be noted that, in this document, unless otherwise expressly specified or limited, the term "connected" or its synonyms should be interpreted broadly. For example, "connected" can mean a fixed or removable connection; a mechanical or electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication between two elements or the interaction between two elements. A person of ordinary skill in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, expressions such as "first" and "second" are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the terms "front," "rear," "left," "right," "upper," and "lower" herein are used with reference to the positions shown in the accompanying drawings.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A leg extension device for a high-altitude fire truck, wherein the leg extension device is arranged on the fire truck frame, characterized in that: The leg extension and retraction device includes a leg box provided on the fire truck frame, a first leg slidably sleeved in the leg box, a second leg slidably sleeved in the first leg, a first oil cylinder vertically provided at the free end of the second leg, and a pressure sensor provided between the first oil cylinder and the second leg, wherein: A first support is fixed to one end of the leg box, a second oil cylinder is fixed to the first support, the second oil cylinder includes a push rod connected to the first support and a cylinder sleeved on the outside of the push rod, the cylinder is connected to a first pulley at one end away from the first support, and is connected to a second pulley at the other end, the second pulley is connected to the first leg, a second support is provided at one end of the leg box away from the first support, and a third support is provided at one end of the second leg close to the leg box, the first support and the third support are connected by a first rope, the first rope is wound around the outer circumference of the first pulley, the third support and the second support are connected by a second rope, and the second rope is wound around the outer circumference of the second pulley.
2. The leg extension device for a climbing fire truck according to claim 1, characterized in that: A first roller is provided on the outer side of one end of the first leg close to the first support, and a third roller is provided on the inner side of the other end. A second roller is provided on the side of the second support close to the first leg. The first roller abuts against the inner wall of the leg box, the second roller abuts against the outer periphery of the first leg, and the third roller abuts against the outer periphery of the second leg.
3. The leg extension device for a climbing fire truck according to claim 1, characterized in that: A sticking plate is provided at the bottom of the leg box.
4. The leg extension device for a climbing fire truck according to claim 1, characterized in that: An extrusion block is provided on the top of one end of the leg box away from the first support.
5. The leg extension device for a climbing fire truck according to claim 4, characterized in that: A proximity switch is provided at the extrusion block on the top of the leg box.
6. The leg extension device for a climbing fire truck according to claim 1, characterized in that: A mounting seat is provided at the middle of one end of the first leg away from the first oil cylinder, and the cylinder barrel is arranged in the mounting seat.
7. The leg extension device for a high-altitude fire truck according to claim 1, characterized in that: The first rope and the second rope are both steel ropes.
8. A high-altitude fire truck, characterized in that: The aerial fire fighting truck comprises the support leg extension device according to any one of claims 1 to 7.