Extension ladder fixing frame of fire fighting truck

Abstract

The utility model discloses an extension ladder fixing frame of a fire fighting truck, and belongs to the field of fire fighting, the fixing frame comprises a fixing plate arranged on a fire fighting truck body and a fixing assembly used for fixing an extension ladder on the fixing plate; a turnover mechanism is arranged on the fire fighting truck body; the turnover mechanism comprises hinged plates which are symmetrically and fixedly connected to the side of the lower end of the fixed plate, fixed seats which are symmetrically arranged on the two sides of the hinged plates and are fixedly connected to the side of the upper end of the fire fighting truck body, synchronous rods which are fixedly inserted into the two hinged plates and are rotatably connected to the fixed seats, and a driving motor which is fixedly mounted on the fire fighting truck body; the output end of the driving motor is fixedly connected with a shaft rod of the synchronous rod. Through the design of the turnover mechanism, the fixing plate horizontally placed at the top of the fire fighting truck body can be turned over to the side face of the truck body and is in a vertical state, so that the height of the extension ladder is reduced from the roof position to the height which a firefighter can stand, the firefighter is prevented from climbing the roof, and the taking and placing efficiency of the extension ladder is remarkably improved.

Description

Technical Field

[0001] This application relates to the field of fire protection technology, specifically a ladder mounting bracket for a fire truck. Background Technology

[0002] In firefighting operations, fire trucks play a crucial role in emergency response and fire rescue, requiring a large amount of firefighting equipment, among which extension ladders are an important component, used by firefighters to access the equipment at height. To save space, extension ladders are typically installed on the roof of the fire truck. However, traditionally, when firefighters need to retrieve the extension ladder, they must climb to the top of the fire truck to disassemble it. This process is inconvenient and, in a time-sensitive rescue scenario, undoubtedly wastes valuable time and delays the rescue opportunity.

[0003] To address this issue, Chinese utility model patent CN222457324U discloses a ladder mounting bracket for fire trucks. This solution uses a drive mechanism to push a telescopic plate, and a sliding mechanism to levitate one side of the plate and flip it to the side of the fire truck. The telescopic plate then extends to lower the ladder's height. Simultaneously, a rotating push rod releases the clamping fixation on the ladder, thus improving the ease of disassembly. However, this solution has significant drawbacks: the drive mechanism occupies a large area, and the overall structure is cumbersome and complex, making it difficult to quickly access the ladder in actual emergency rescue situations, thus affecting rescue efficiency.

[0004] Therefore, this application provides a ladder mounting bracket for fire trucks to solve the above-mentioned problems. Utility Model Content

[0005] This application provides a fire truck ladder mounting bracket, which aims to solve the problems mentioned in the background art, such as the difficulty in quickly removing existing ladders.

[0006] To achieve the above objectives, this application provides the following technical solution: a fire truck ladder mounting bracket, comprising a mounting plate disposed on the fire truck body for placing the ladder and a fixing assembly for fixing the ladder to the mounting plate;

[0007] To facilitate the removal of the ladder, the fire truck body is equipped with a flipping mechanism for driving the fixed plate to rotate. This mechanism includes hinge plates symmetrically fixed to the lower side of the fixed plate, fixed seats symmetrically arranged on both sides of the hinge plates and fixedly connected to the upper side of the fire truck body, a synchronizing rod fixedly inserted into the two hinge plates and rotatably connected to the fixed seats, and a drive motor fixedly mounted on the fire truck body. The output end of the drive motor is fixedly connected to the shaft of the synchronizing rod. When the ladder needs to be retrieved, the drive motor starts, and its output end drives the synchronizing rod to rotate. The synchronizing rod passes through and is fixedly connected to the two hinge plates, which are hinged to the upper side of the fire truck body via the fixed seats. Therefore, the rotation of the synchronizing rod drives the hinge plates to rotate around the hinge point of the fixed seats, thereby causing the fixed plate and the ladder to rotate as a whole. After the fixed plate rotates 270° from its horizontal position, its upper end faces the side of the fire truck body. At this point, the ladder located at the lower end of the fixed plate is exposed, at a height that firefighters can directly access without having to climb the roof.

[0008] Preferably, to facilitate fixing the ladder to the fixing plate: the fixing assembly includes an L-plate fixedly connected to the lower end of the fixing plate away from the hinge plate. One side of the ladder is inserted between the L-plate and the fixing plate. Two cams are symmetrically and rotatably mounted on the lower end of the fixing plate near the hinge plate, and the protruding surfaces of the cams abut against the other side of the ladder. The fixing assembly, through the cooperation of the L-plate and the cams, forms a bidirectional limiting structure for the ladder, ensuring that the ladder is stably fixed to the fixing plate during transportation, preventing shaking or falling off. At the same time, the rotating clamping design of the cams allows fixing and disassembly operations to be completed with just a simple rotation, resulting in a simple structure, effortless operation, and a balance between fixing reliability and ease of handling.

[0009] Preferably, to facilitate synchronous rotation of the two cams: a drive rod is rotatably inserted into the eccentric shaft of each cam, and a connecting rod is fixedly connected between the two drive rods. The connecting rod securely connects the two drive rods, achieving synchronous rotation of the cams on both sides. This avoids the problem of one cam not resetting or being out of sync during manual operation, ensuring uniform fixing force on both sides of the ladder, improving fixing reliability, and simplifying operation steps. Simply pushing or pulling the connecting rod is sufficient to synchronously control the two cams, improving loading and unloading efficiency.

[0010] Preferably, to increase the friction between the hand and the connecting rod: an anti-slip sleeve is fixedly fitted onto the connecting rod, and the anti-slip sleeve has raised anti-slip patterns. The anti-slip sleeve increases the contact friction between the hand and the connecting rod through the raised anti-slip patterns, preventing the hand from slipping during operation. Especially when firefighters are wearing gloves or have wet hands, they can still reliably apply force, ensuring stable and effortless rotation of the cam, and improving operational reliability in emergency situations.

[0011] Preferably, to prevent the ladder from wobbling between the cam and the L-plate: a rubber pad is fixedly provided on the side of the L-plate corresponding to the cam, and the rubber pad abuts against the ladder. The rubber pad is located on the side of the L-plate that contacts the ladder, and uses the elastic deformation of the rubber to fill the gap between the ladder and the L-plate, buffering the vibration and impact during vehicle movement, preventing the ladder from generating noise or wear due to wobbling, and at the same time increasing the friction during fixing, further improving the fixing stability of the ladder.

[0012] Preferably, to prevent the fixing plate from colliding with the fire truck body, rubber posts are fixedly connected to the four corners of the upper and lower ends of the fixing plate. The rubber posts, located at the four corners of the fixing plate, act as a buffer during the plate's rotation, preventing a rigid collision between the fixing plate and the fire truck body, protecting the fixing plate and the vehicle structure from damage, extending the equipment's service life, and reducing collision noise.

[0013] This application utilizes a flipping mechanism to flip a fixed plate that is horizontally placed on top of the fire truck body to the side of the vehicle and into a vertical position. This lowers the height of the ladder from the top of the vehicle to a height that firefighters can stand at, avoiding the need for firefighters to climb the roof and significantly improving the efficiency of ladder retrieval and deployment. At the same time, the mechanism adopts a symmetrical hinge and synchronous drive design, which is simple and compact in structure, convenient and reliable in operation, and adapts to the rapid response requirements of emergency rescue scenarios.

[0014] The fixing component of this application forms a two-way limiting structure for the pull ladder through the cooperation of the L-plate and the cam, ensuring that the pull ladder is stably fixed to the fixing plate during transportation and preventing shaking or falling off. At the same time, the rotating clamping design of the cam makes fixing and disassembly operations only require a simple rotation, which is simple in structure, labor-saving in operation, and takes into account both the reliability of fixing and the convenience of picking up and putting down.

[0015] This application utilizes the design of rubber columns to buffer the movement of the fixed plate during its flipping process, preventing rigid collisions between the fixed plate and the fire truck body, protecting the fixed plate and the vehicle structure from damage, extending the service life of the equipment, and reducing collision noise. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a fire truck ladder mounting bracket;

[0017] Figure 2 This is a schematic diagram of the structure after the fixed plate is flipped over;

[0018] Figure 3 This is a schematic diagram showing the connection between the fixed plate, the flipping mechanism, and the fixed components.

[0019] In the picture:

[0020] 1. Fire truck body; 2. Extension ladder; 3. Fixing plate; 31. Rubber column; 4. Fixing assembly; 41. L-plate; 411. Rubber pad; 42. Cam; 421. Drive rod; 422. Connecting rod; 4221. Anti-slip sleeve; 5. Tilting mechanism; 51. Hinge plate; 52. Fixing base; 53. Synchronizing rod; 54. Drive motor. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] Example 1

[0023] This embodiment provides a ladder mounting bracket for a fire truck, such as... Figure 1-3 As shown, the mounting bracket includes a mounting plate 3 for placing the extension ladder 2 on the fire truck body 1, and a mounting assembly 4 for fixing the extension ladder 2 to the mounting plate 3;

[0024] To facilitate the removal of the extension ladder 2, the fire truck body 1 is equipped with a flipping mechanism 5 for driving the fixed plate 3 to flip. The flipping mechanism 5 includes hinge plates 51 symmetrically fixed to the lower side of the fixed plate 3, fixed seats 52 symmetrically arranged on both sides of the hinge plates 51 and fixedly connected to the upper side of the fire truck body 1, a synchronous rod 53 fixedly inserted into the two hinge plates 51 and rotatably connected to the fixed seats 52, and a drive motor 54 fixedly installed on the fire truck body 1. The output end of the drive motor 54 is fixedly connected to the shaft of the synchronous rod 53. Through the design of the flipping mechanism 5, the fixed plate 3, which is horizontally placed on the top of the fire truck body 1, can be flipped to the side of the vehicle and placed vertically, so that the height of the extension ladder 2 is lowered from the top of the vehicle to a height that firefighters can stand at, avoiding firefighters climbing the top of the vehicle and significantly improving the efficiency of removing and placing the extension ladder 2. At the same time, the mechanism adopts a symmetrical hinge and synchronous drive design, which is simple and compact in structure, convenient and reliable in operation, and adapts to the rapid response requirements of emergency rescue scenarios. When the extension ladder 2 needs to be accessed, the drive motor 54 starts, and its output drives the synchronizing rod 53 to rotate. The synchronizing rod 53 passes through and is fixedly connected to the hinge plates 51 on both sides. The hinge plates 51 are hinged to the upper side of the fire truck body 1 through the fixing seat 52. Therefore, the rotation of the synchronizing rod 53 drives the hinge plates 51 to rotate around the hinge point of the fixing seat 52, thereby causing the fixing plate 3 and the extension ladder 2 to rotate as a whole. After the fixing plate 3 rotates 270° from the horizontal position, its upper end is opposite to the side of the fire truck body 1. At this time, the extension ladder 2 located at the lower end of the fixing plate 3 is exposed and at a height that firefighters can directly access without having to climb the roof of the vehicle.

[0025] To facilitate the fixing of the ladder 2 to the fixing plate 3, the fixing assembly 4 includes an L-plate 41 fixedly connected to the lower end of the fixing plate 3 away from the hinge plate 51. One side of the ladder 2 is inserted between the L-plate 41 and the fixing plate 3. Two cams 42 are symmetrically and rotatably mounted on the lower end of the fixing plate 3 near the hinge plate 51, with the protruding surfaces of the cams 42 abutting against the other side of the ladder 2. The fixing assembly 4, through the cooperation of the L-plate 41 and the cams 42, forms a bidirectional limiting structure for the ladder 2, ensuring that the ladder 2 is stably fixed to the fixing plate 3 during transportation, preventing shaking or falling off. Simultaneously, the rotating clamping design of the cams 42 allows for simple rotation during fixing and disassembly, resulting in a simple structure, effortless operation, and a balance between reliable fixing and convenient handling. One side of the ladder 2 is inserted between the L-plate 41 at the lower end of the fixing plate 3 and the fixing plate 3, forming a one-sided limiting; the other side is clamped and fixed by two symmetrically arranged cams 42. When the protruding surface of cam 42 rotates to abut against the side of the ladder 2, the eccentric profile of cam 42 generates radial pressure, clamping the ladder 2 between L plate 41 and cam 42; when it is necessary to disassemble the ladder 2, rotate cam 42 to move its protruding surface away from the ladder 2, release the clamping state, and the ladder 2 can be easily removed.

[0026] To facilitate synchronous rotation of the two cams 42, a drive rod 421 is rotatably connected to the eccentric shaft of each cam 42, and a connecting rod 422 is fixedly connected between the two drive rods 421. The connecting rod 422 securely connects the two drive rods 421, enabling synchronous rotation of the two cams 42. This avoids the problem of one cam 42 not resetting or being out of sync during manual operation, ensuring uniform fixing force on both sides of the ladder 2, improving fixing reliability, and simplifying operation. Simply pushing or pulling the connecting rod 422 is sufficient to synchronously control the two cams 42, improving loading and unloading efficiency. Each cam 42 has a drive rod 421 rotatably connected to its eccentric shaft, and the two drive rods 421 are fixedly connected via the connecting rod 422. When the connecting rod 422 is operated (e.g., by horizontal pushing, pulling, or rotating), the drive rod 421 drives the cam 42 to rotate synchronously around its eccentric shaft, causing the protruding surfaces of the two cams 42 to simultaneously press against or move away from the ladder 2, achieving synchronous control of the fixing force on both sides.

[0027] To enhance the friction between the hand and the connecting rod 422, an anti-slip sleeve 4221 is fixedly fitted onto the connecting rod 422. The anti-slip sleeve 4221 has raised anti-slip textures. These textures increase the contact friction between the hand and the connecting rod 422, preventing slippage during operation. This is especially important when firefighters are wearing gloves or have wet hands, ensuring reliable force application and stable, effortless rotation of the cam 42, thus improving operational reliability in emergency situations. The anti-slip sleeve 4221 is made of materials with a high coefficient of friction, such as rubber, and the surface textures increase the roughness of the contact surface. When the hand grips the anti-slip sleeve 4221, the mechanical engagement between the anti-slip textures and the glove or skin increases static friction, allowing firefighters to transmit operating force more efficiently when pushing or pulling the connecting rod 422, preventing slippage.

[0028] To prevent the pull ladder 2 from wobbling between the cam 42 and the L-plate 41, a rubber pad 411 is fixedly installed on the side of the L-plate 41 corresponding to the cam 42, and the rubber pad 411 abuts against the pull ladder 2. The rubber pad 411, located on the side of the L-plate 41 that contacts the pull ladder 2, uses the elastic deformation of the rubber to fill the gap between the pull ladder 2 and the L-plate 41, buffering the vibration and impact during vehicle movement, preventing noise or wear caused by wobbling of the pull ladder 2, and simultaneously increasing the friction during fixing, further improving the stability of the pull ladder 2. When the pull ladder 2 is inserted between the L-plate 41 and the fixing plate 3, the side of the pull ladder 2 contacts the rubber pad 411. The elasticity of the rubber pad 411 causes it to deform when compressed, tightly fitting the surface of the pull ladder 2 and eliminating gaps; at the same time, the high frictional properties of the rubber material increase the frictional force between the pull ladder 2 and the L-plate 41, suppressing the wobbling of the pull ladder 2 and ensuring stability during transportation.

[0029] Example 2

[0030] Unlike Embodiment 1, to prevent the fixing plate 3 from colliding with the fire truck body 1, rubber posts 31 are fixedly connected to the four corners of the upper and lower ends of the fixing plate 3. The rubber posts 31, located at the four corners of the fixing plate 3, act as a buffer during the flipping process of the fixing plate 3, preventing a rigid collision between the fixing plate 3 and the fire truck body 1, protecting the fixing plate 3 and the vehicle body structure from damage, extending the service life of the equipment, and reducing collision noise. When the fixing plate 3 flips to approach the fire truck body 1, the rubber posts 31 at the four corners first contact the vehicle body surface. The elastic material properties of the rubber posts 31 cause them to undergo compressive deformation under impact, converting mechanical energy into elastic potential energy, thereby absorbing and buffering collision energy, reducing the impact force, and ensuring that the contact between the fixing plate 3 and the vehicle body is a flexible buffer contact, rather than a hard impact.

[0031] The wiring diagram of the drive motor 54 in this utility model is common knowledge in the field. Its working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring layout of the drive motor 54 will not be explained in detail.

[0032] The control method of this application is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0033] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0034] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A fire truck ladder fixing frame, comprising a fixing plate (3) arranged on a fire truck body (1) for placing a ladder (2) and a fixing assembly (4) for fixing the ladder (2) on the fixing plate (3). characterized in that The fire truck body (1) is provided with a turnover mechanism (5) for driving the fixing plate (3) to turn over, the turnover mechanism (5) comprising hinged plates (51) fixedly connected to the lower end side of the fixing plate (3), fixing seats (52) symmetrically arranged on both sides of the hinged plates (51) and fixedly connected to the upper end side of the fire truck body (1), a synchronous rod (53) fixedly inserted into the two hinged plates (51) and rotatably connected to the fixing seats (52), and a driving motor (54) fixedly installed on the fire truck body (1), wherein the output end of the driving motor (54) is fixedly connected to the shaft of the synchronous rod (53).

2. The fire apparatus ladder-tube holder of claim 1, wherein: The fixing assembly (4) comprises an L-shaped plate (41) fixedly connected to the lower end of the fixing plate (3) away from the hinged plates (51), one side of the ladder (2) is inserted between the L-shaped plate (41) and the fixing plate (3), and the lower end of the fixing plate (3) is symmetrically rotatably provided with two cams (42) near the hinged plates (51), wherein the protruding surface of the cam (42) is in abutment with the other side of the ladder (2).

3. The fire apparatus ladder-tube holder of claim 2, wherein: The eccentric shaft of the cam (42) is rotatably inserted with a driving rod (421), and the two driving rods (421) are fixedly connected with a connecting rod (422).

4. The fire apparatus ladder-tube holder of claim 3, wherein: The connecting rod (422) is fixedly sleeved with an anti-skid sleeve (4221), and the anti-skid sleeve (4221) is provided with protruding anti-skid lines.

5. The fire apparatus ladder-tube holder of claim 2, wherein: The L-shaped plate (41) is fixedly provided with rubber pads (411) corresponding to the cams (42), and the rubber pads (411) are in abutment with the ladder (2).

6. The fire apparatus ladder-tube holder of claim 1, wherein: The upper end and the lower end of the fixing plate (3) are fixedly connected with rubber columns (31).

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