Climbing fire fighting truck and landing leg telescopic device and landing leg telescopic method thereof
By designing a leg telescopic device for a fire truck at the height, the leg system in the prior art is solved, and the problem of heavy structure, difficulty in extending out of work and lack of real-time monitoring of force conditions, stable expansion and real-time force monitoring of the leg are achieved, and the safety and efficiency of the work are improved.
Patent Information
- Application Number
- CN202411648398.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-03-18
AI Technical Summary
The leg system of the existing high-rise fire truck has a heavy structure and is not easy to extend out of work in various positions. It lacks the function of real-time monitoring of stress conditions, which may cause the leg to be suspended and dangerous, affecting the safety and efficiency of operations.
A leg telescopic device for a fire truck for climbing a high is designed, including a leg box, a sliding sleeve structure, an oil cylinder and a pressure sensor. The combination of the sliding sleeve and an oil cylinder is used to achieve stable telescopic expansion and contraction of the legs, and the pressure sensor is used to monitor the force of the legs in real time.
Through weight reduction design and roller structure, the device achieves stable and smooth expansion of the legs, ensuring the reliability and safety of the device, and improving the safety and efficiency of the operation through real-time monitoring functions.
Smart Images
Figure CN119636648A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fire truck outriggers, and in particular relates to a high-altitude fire truck and an outrigger leg extension and retraction device and an outrigger leg extension and retraction method 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 for fire extinguishing, auxiliary fire extinguishing 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 primary outrigger, a secondary 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 results in the overall structure being too heavy. In the field of automobile cranes, the outriggers are all in a fully extended state for lifting operations, while the outriggers of fire trucks need to be able to be extended at all positions for operation. The existing bottom reinforcement structure of the outrigger box is of a box type, which is relatively complex in structure, and only considers the strength of the bottom plate in the fully extended state, and it is difficult to ensure the structural strength of the outriggers at all extended positions. 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, and the legs have a large sliding resistance when extending or retracting. The legs will get stuck when they are telescoped, and when disassembling and assembling the horizontal cylinder of the existing legs, the legs need to be taken out of the leg box before the 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 telescopic device and leg telescopic method. Summary of the invention
[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a climbing fire truck and its leg extension and retraction device and leg extension and retraction method.
[0005] On the one hand, the present invention provides a leg extension and retraction device for a climbing fire truck, the leg extension and retraction device is arranged on a fire truck frame, the leg extension and retraction device 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 periphery of the first pulley, the third support and the second support are connected by a second rope, the second rope is wound around the outer periphery of the second pulley.
[0007] Furthermore, in the above-mentioned leg extension and retracting 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 retracting 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 retracting device for a high-altitude fire truck, an extrusion block is provided at the top of one end of the outrigger box away from the first support.
[0010] Furthermore, in the above-mentioned leg extension and retracting 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 retracting device for a high-altitude fire truck, the first rope and the second rope are both steel wire ropes.
[0012] As a specific implementation, in the above-mentioned outrigger extension and retracting device for a high-altitude fire truck, a proximity switch is provided at the extrusion block at the top of the outrigger box.
[0013] The method for extending and retracting the legs of a climbing fire truck provided by the present invention comprises:
[0014] Step 1: When all the legs need to be extended, the push rod is controlled to extend from the cylinder, and the cylinder drives the first pulley and the second pulley to move away from the first support, and the second pulley then drives the first leg to move away from the first support. During this process, the first rope between the first support and the first pulley gradually increases, and the first rope between the third support and the first pulley gradually shortens. The first rope then drives the third support to move away from the first support, and the second leg is extended accordingly. During this process, the second rope between the third support and the second pulley gradually increases, and the second rope between the second support and the second pulley gradually shortens, until all the legs are extended.
[0015] Step 2: When all the legs need to be retracted, the push rod is controlled to retract into the cylinder barrel, and the cylinder barrel drives the first pulley and the second pulley to move toward the first support, and the second pulley then drives the first leg to move away from the first support. During this process, the second rope between the third support and the second pulley gradually shortens, and the second rope between the second support and the second pulley gradually increases. The second rope then drives the third support to move toward the first support, and the second leg retracts accordingly. During this process, the first rope between the first support and the first pulley gradually shortens, and the first rope between the third support and the first pulley gradually increases until the retraction of all the legs is completed.
[0016] On the other hand, the present invention further provides a climbing fire truck, which comprises the above-mentioned leg extension and retracting device.
[0017] The climbing fire truck and the leg extension and retraction device and leg extension and retraction method of the present invention have the following advantages and positive effects:
[0018] (1) The present invention 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, rollers are provided between the first leg, the second leg and the leg box, so that the extension and retraction of the first leg and the second leg can be more stable and smooth.
[0019] (2) The present invention 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
[0020] 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 use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0021] Figure 1 It is a structural schematic diagram of a leg extension and retracting device for a climbing fire truck of the present invention;
[0022] Figure 2 It is a structural schematic diagram of a plate in a leg extension and retracting device for a high-altitude fire truck of the present invention;
[0023] Figure 3 It is a structural schematic diagram of a mounting seat in a leg extension and retracting device for a climbing fire truck of the present invention;
[0024] Figure 4 It is a schematic diagram of the retracted state of the legs of the leg extension and retracting device for a high-altitude fire truck of the present invention.
[0025] Description of reference numerals:
[0026] 1-leg box, 11-first support, 12-sticking plate, 13-extrusion block, 2-first leg, 21-second support, 22-first roller, 23-third roller, 24-mounting seat, 3-second leg, 31-third support, 4-first cylinder, 5-pressure sensor, 6-second cylinder, 61-push rod, 62-cylinder, 7-first pulley, 71-first rope, 8-second pulley, 81-second rope, 9-proximity switch. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0028] like Figures 1 to 4 As shown, the present invention provides a climbing fire truck and a leg extension and retraction device and a leg extension and retraction method thereof.
[0029] On the one hand, the present invention 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, 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 barrel sleeved on the outside of the push rod 61. 62, the push rod 61 can be freely extended and retracted in the cylinder 62, 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, the second support 21 is fixedly arranged on the inner side of the bottom of the leg box 1, the second leg 3 is provided with a third support 31 at one end close to the leg box 1, 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, the first rope 71 is wound around and slidably connected to the outer periphery of the first pulley 7 to form a pulley block, the third support 31 and the second support 21 are connected by a second rope 81, the second rope 81 is wound around and slidably connected to the outer periphery of the second pulley 8 to form a pulley block.
[0030] 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 second support 21 near the side of 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.
[0031] 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.
[0032] 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 arranged on the top of the leg box 1 away from the first support 11. Such arrangement can ensure that the overall structure of the leg box 1 will not be deformed 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.
[0033] Furthermore, in the leg extension and retraction device for a high-altitude fire truck of the present invention, a mounting seat 24 is provided at the middle of one end of the first leg 2 away from the first cylinder 4, and the cylinder barrel 62 is disposed in the mounting seat 24. Such an arrangement ensures the stability and safety of the second cylinder 6 during the extension and retraction process.
[0034] As a specific implementation, in the leg extension and retracting device for a high-altitude fire truck of the present invention, the first rope 71 and the second rope 81 are both steel wire 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.
[0035] 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 top extrusion block 13 of the leg box 1. This arrangement is 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 unfolding the legs to determine whether it is supported on the ground, thereby ensuring that the legs bear the load.
[0036] The leg extension and retraction method for a high-altitude fire fighting truck of the present invention is implemented by using the above-mentioned leg extension and retraction device, and specifically comprises the following steps:
[0037] Step 1: When all the legs need to be extended, the control push rod 61 is extended 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, and 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;
[0038] Step 2: 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.
[0039] Furthermore, in the leg extension and retraction method 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.
[0040] On the other hand, the present invention further provides a climbing fire truck, which comprises the above-mentioned leg extension and retracting device.
[0041] In summary, compared with the prior art, the climbing fire truck and its leg extension and retraction device and leg extension and retraction method of the present invention have the following advantages and positive effects:
[0042] (1) The present invention provides a sticking plate 12 at the bottom of the leg box 1 and a squeezing 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. Furthermore, 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.
[0043] (2) The present invention 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 outrigger 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.
[0044] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.
[0045] 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 embodiments of the present invention.
Claims
1. A leg extension device for a high-altitude fire truck, the leg extension device being arranged on a fire truck frame, characterized in that: The leg extension and retracting device 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: 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 periphery of the first pulley, the third support and the second support are connected by a second rope, the second rope is wound around the outer periphery of the second pulley.
2. The leg extension device for a high-altitude fire truck according to claim 1, characterized in that: A first roller is arranged on the outer side of one end of the first leg close to the first support, and a third roller is arranged on the inner side of the other end; a second roller is arranged 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 and retracting device for a high-altitude fire truck according to claim 1, characterized in that: A pasting plate is arranged at the bottom of the outrigger box.
4. The leg extension and retracting device for a high-altitude fire truck according to claim 1, characterized in that: An extrusion block is arranged on the top of one end of the leg box away from the first support.
5. The leg extension and retracting device for a high-altitude fire truck according to claim 1, characterized in that: A mounting seat is arranged 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.
6. The leg extension and retracting device for a high-altitude fire truck according to claim 1, characterized in that: The first rope and the second rope are both steel wire ropes.
7. The leg extension and retracting device for a high-altitude fire truck according to claim 1, characterized in that: A proximity switch is arranged at the extrusion block at the top of the leg box.
8. A method for extending and retracting legs of a high-altitude fire truck, the method for extending and retracting legs being implemented using the leg extending and retracting device according to any one of claims 1 to 7, comprising: Step 1: When all the legs need to be extended, the push rod is controlled to extend from the cylinder, and the cylinder drives the first pulley and the second pulley to move away from the first support, and the second pulley then drives the first leg to move away from the first support. During this process, the first rope between the first support and the first pulley gradually increases, and the first rope between the third support and the first pulley gradually shortens. The first rope then drives the third support to move away from the first support, and the second leg is extended accordingly. During this process, the second rope between the third support and the second pulley gradually increases, and the second rope between the second support and the second pulley gradually shortens, until all the legs are extended. Step 2: When all the legs need to be retracted, the push rod is controlled to retract into the cylinder barrel, and the cylinder barrel drives the first pulley and the second pulley to move toward the first support, and the second pulley then drives the first leg to move away from the first support. During this process, the second rope between the third support and the second pulley gradually shortens, and the second rope between the second support and the second pulley gradually increases. The second rope then drives the third support to move toward the first support, and the second leg retracts accordingly. During this process, the first rope between the first support and the first pulley gradually shortens, and the first rope between the third support and the first pulley gradually increases until the retraction of all the legs is completed.
9. A high-altitude fire truck, characterized in that: The aerial fire fighting truck comprises the leg extension and retracting device according to any one of claims 1 to 7.