A fire truck

Abstract

The application discloses a fire engine, comprising a vehicle body, a first winding device, a driving mechanism, a first brake mechanism, a second winding device, a manual turntable and a second brake mechanism. Through the above manner, the fire engine disclosed by the application is configured with two winding devices at the rear end of the vehicle body, so that the water belt can be wound on the fire engine, manual carrying of the water belt is not needed, the manual labor is relatively small, the winding operation efficiency is improved, the first winding device is powered by the driving mechanism, the driving mechanism adopts a double-power source design of a power takeoff and a driving motor, the two power sources are used as backup for each other, reliable power supply is ensured under different working conditions, the second winding device is operated through the manual turntable, and the second brake mechanism is used for speed reduction control, so that the water belt cannot be swung to hurt the operator, the rotation is stable and safe, the two winding modes are cooperatively matched, the winding efficiency and the operation flexibility are considered, and the overall performance of the water belt winding operation of the fire engine is improved.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, specifically to a fire truck. Background Technology

[0002] As core equipment for fire fighting and rescue, the efficiency of fire truck hose laying and winding directly affects the speed of rescue operations. Currently, most firefighting operations rely on manual winding, where hoses are manually wound and then transported to the fire truck for placement. This is labor-intensive. While some fire trucks are equipped with a single winding device, these devices have relatively simple braking mechanisms, making it difficult to effectively control the rotation of the reel during winding. Especially under heavy loads or high-speed unwinding conditions (where the hose is relatively large), they cannot smoothly suppress the inertial movement of the reel, which can easily lead to hose loosening, swinging, or even injury to operators, affecting the safety and winding quality of the winding operation. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a fire truck that can solve the aforementioned technical problems.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fire truck, characterized in that it includes: a vehicle body, wherein a first slot and a second slot are spaced apart on one side of the rear end of the vehicle body; a first protective body for covering the first slot and a second protective body for covering the second slot are liftably and vertically arranged on one side of the rear end of the vehicle body; the horizontal plane of the bottom wall of the first slot is lower than the horizontal plane of the bottom wall of the second slot; the second slot is located above the rear wheel of the vehicle body; and the rear wall of the rear end of the vehicle body is also provided with an outlet for discharging water hoses, which communicates with the first slot. The device comprises: a first winding device disposed on the bottom wall of the first slot for winding the water hose; a drive mechanism disposed in the first slot for driving the first winding device to rotate; a first brake mechanism disposed in the first winding device for controlling the first winding device to not rotate; a second winding device movably disposed on the bottom wall of the second slot for winding the water hose; a manual turntable disposed on one side of the second winding device for driving the second winding device to rotate; and a second brake mechanism disposed on the other side of the second winding device for braking the rotation of the second winding device to rotate slowly.

[0005] Preferably, the first winding device includes: a first base plate, rectangular in shape, disposed on the bottom wall of the first slot; a first bracket, disposed on one side of the first base plate; a second bracket, disposed on the other side of the first base plate; a first clamping plate; a second clamping plate, wherein a connecting cylinder is fixedly disposed between the first clamping plate and the second clamping plate, wherein the driving mechanism includes a driving shaft, the driving shaft passing through the top end of the first bracket and the first clamping plate and located inside the connecting cylinder, one end of the driving shaft having a first friction pressure plate located inside the connecting cylinder; a driving rod, one end of which passes through the top end of the second bracket, and the other end of which passes through the second clamping plate and is located inside the connecting cylinder, having a second friction pressure plate located inside the connecting cylinder and used to press against the first friction pressure plate; and a control mechanism connected to the second clamping plate, having a handle for controlling the movement of the driving rod to drive the second friction pressure plate on the driving rod to move.

[0006] Preferably, the first clamping plate and the second clamping plate are located between the first support and the second support, wherein the first friction pressure plate and the second friction pressure plate are both circular in shape, and friction structures are provided between the opposing surfaces of the first friction pressure plate and the second friction pressure plate. An arc-shaped plate is fixedly provided between the first clamping plate and the second clamping plate outside the connecting cylinder, and the arc-shaped plate and the outer wall of the connecting cylinder form an arc-shaped receiving groove. The top end of the first support is provided with a first through hole, and a first bearing is provided in the first through hole. The drive shaft passes through the first bearing. The top end of the second support is provided with a second through hole, and a linear rotating bushing is provided in the second through hole. One end of the drive rod passes through the linear rotating bushing.

[0007] Preferably, the drive mechanism further includes a power take-off (PTO) disposed in the vehicle body, a drive motor disposed in the vehicle body, a first transmission gear mechanism for connecting the PTO and the other end of the drive shaft to allow the PTO to drive the drive shaft to rotate, and a second transmission gear mechanism for connecting the rotating shaft of the drive motor and the other end of the drive shaft to allow the drive motor to drive the drive shaft to rotate. When there is an external power input, the second transmission gear mechanism connects the rotating shaft of the drive motor and the other end of the drive shaft to drive the first winding device to rotate. When there is no external power input, the first transmission gear mechanism connects the PTO and the other end of the drive shaft to drive the first winding device to rotate.

[0008] Preferably, the first braking mechanism includes: a sleeve fitted over the drive rod, wherein the sleeve is fixedly connected to the top end of the second bracket; a drive cylinder fitted over the sleeve, wherein the handle is fixedly connected to the drive cylinder; a second bearing fixedly fitted over the drive rod, wherein the outer ring of the second bearing is fixedly connected to the drive cylinder; a connecting disc fixedly connected to the second clamping plate, wherein the drive rod passes through the connecting disc, and the center of the connecting disc is fixedly connected to the inner ring of the second bearing; wherein the drive cylinder is threadedly connected to the sleeve.

[0009] Preferably, the connecting disc is circular in shape, wherein the connecting disc includes an annular body and a plurality of elastic plates. The annular body is connected to the second clamping plate by a threaded connection, and one end of each elastic plate is fixedly disposed on the side wall of the inner hole of the annular body. The other end of the plurality of elastic plates forms a circular opening and is fixedly connected to the inner ring of the second bearing. The drive rod passes through the opening.

[0010] Preferably, the second winding device includes: a first slide rail and a second slide rail, spaced apart on the bottom wall of the first slot, wherein the first slide rail is provided with a first sliding block and the second slide rail is provided with a second sliding block; and a second base plate, disposed on the first sliding block and the second sliding block. The third bracket is disposed on one side of the second base plate, wherein the manual turntable is disposed outside the top of the third bracket and fixedly connected to the first rotating shaft of the third clamping plate, so as to drive the third clamping plate to rotate through the manual turntable; the fourth bracket is disposed on the other side of the second base plate; the third clamping plate has a first rotating shaft on its outer side wall, wherein the first rotating shaft is rotatably disposed at the top of the third bracket; the fourth clamping plate is connected to the third clamping plate through a connecting post, wherein the outer side wall of the fourth clamping plate has a second rotating shaft, wherein the second rotating shaft is rotatably disposed at the top of the fourth bracket, the third clamping plate and the fourth clamping plate are located between the third bracket and the fourth bracket, and the second braking mechanism is disposed on the fourth bracket, and has a friction plate for decelerating the second rotating shaft of the fourth clamping plate, and the connecting post has a semi-circular receiving slot for receiving the connector of the water hose.

[0011] Preferably, the second braking mechanism includes: a friction wheel fixedly mounted outside the second rotating shaft; a fixing rod mounted on the fourth bracket; and a metal sheet, elongated rectangular in shape, surrounding the friction wheel, wherein both ends of the metal sheet are mounted on the fixing rod, the friction pad is disposed within the metal sheet and in close contact with the friction wheel, and the friction pad is elongated rectangular in shape with a width equal to the width of the metal sheet. The friction wheel has an annular friction pad receiving groove, the metal sheet and the friction pad are disposed within the friction pad receiving groove, and one end of the metal sheet is fixedly mounted on the fixing rod, while the other end of the metal sheet is fixedly mounted on the fixing rod by a buffer spring.

[0012] Preferably, both the first sliding block and the second sliding block are elongated, and the second base plate is fixedly disposed between the first sliding block and the second sliding block. A support pad is rotatably disposed on one side of the rear end of the vehicle body, located below the second slot. The second base plate is slidably disposed directly above the support pad. An auxiliary support rod for supporting the support pad is rotatably disposed on the bottom wall of one side of the second base plate, and the length of the auxiliary support rod is equal to the distance between the second base plate and the support pad.

[0013] Preferably, the auxiliary support rod is a hollow, elongated rectangular three-dimensional shape. One side of one end of the auxiliary support rod is connected to the bottom wall of one side of the second base plate by a hinge. The top of the third bracket is provided with a locking member. The locking member has a locking hole in the vertical direction. A locking rod is inserted into the locking hole. The distance between the locking member and the second base plate is equal to or less than the length of the auxiliary support rod, so that the auxiliary support rod can be locked on the third bracket by inserting the locking rod into the locking hole and the inner hole of the other end of the auxiliary support rod.

[0014] Compared with the prior art, the present invention provides a fire truck with the following beneficial effects: 1. The fire truck disclosed in this invention is equipped with a first winding device and a second winding device at the rear of the vehicle body, which can realize the winding of water hose on the fire truck without the need for manual handling of water hose on and off the vehicle. The manual labor intensity is relatively small, and the winding operation efficiency is improved. 2. The first winding device is powered by the drive mechanism to achieve automated winding, reducing the labor intensity of operators. It can achieve automatic winding and unwinding with relatively low labor intensity and greatly improve winding and unwinding efficiency. The drive mechanism adopts a dual power source design of power take-off and drive motor. When there is an external power supply, it is driven by the drive motor. When there is no external power supply, it switches to power take-off drive. The two power sources serve as backups for each other, so that the first winding device can obtain reliable power supply under different working conditions. It avoids the interruption of winding operation due to the failure of a single power source, improving the adaptability and reliability of the device. The first braking mechanism is used to control the start and stop of the first winding device. It can stop or start the rotation of the reel as needed during the winding process, making the winding rhythm controllable and the operation convenient and labor-saving. 3. The second winding device is operated by a manual turntable, providing operators with a flexible manual winding method to adapt to the needs of different working conditions. At the same time, the second braking mechanism slows down the rotation of the reel to prevent the reel from rotating too fast during manual operation, ensuring smooth and safe rotation and preventing the water hose from swinging and injuring the operator, thus reducing the risk of operation. 4. The two rewinding methods work together, balancing rewinding efficiency and operational flexibility, enabling fire trucks to efficiently and safely rewind hoses in different operating scenarios, thus improving the overall performance of fire truck hose rewinding operations. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the fire truck of the present invention; Figure 2 for Figure 1 A partial structural diagram of a fire truck; Figure 3 for Figure 1 A schematic diagram of the first winding device of a fire truck. Figure 4 for Figure 1 A schematic diagram of the second winding device of a fire truck. Figure 5 for Figure 4 Another structural schematic diagram of the second winding device; Figure 6 for Figure 4 A partial structural schematic diagram of the second winding device; Figure 7 for Figure 3 A partial structural diagram of the first winding device in the middle; Figure 8 for Figure 3 A schematic diagram of the second partial structure of the first winding device; Figure 9 for Figure 1 A schematic diagram of the sliding rail mechanism of a fire truck. Figure 10 for Figure 1 A schematic diagram of the second braking mechanism of a fire truck. Figure 11 for Figure 1 A partial structural diagram of the first winding device and drive mechanism of a fire truck. Figure 12 for Figure 1 A schematic diagram of the first braking mechanism of a fire truck. Figure 13 for Figure 12 A partial structural diagram of the first braking mechanism; Figure 14 for Figure 3 A schematic diagram of the structure of the second friction pressure plate of the first winding device; Figure 15 for Figure 11 A schematic diagram of the structure of the first friction plate of the drive mechanism; Figure 16 for Figure 1 A schematic diagram of the locking mechanism on a fire truck.

[0016] Wherein: 1-Car body, 111-First slot, 112-Second slot, 13-Output port, 2-First winding device, 21-First base plate, 22-First bracket, 221-First bracket, 2211-First through hole, 2212-First bearing, 222-Second bracket, 2221-Second through hole, 2222-Linear rotating bushing, 23-First clamping plate, 231-First clamping plate, 232-Second clamping plate, 24-Drive rod, 25-Control mechanism, 251-Handle, 26-Connecting cylinder, 27-Second friction pressure plate, 271-Catching rod, 28-Arc plate, 281-Receiving clamping groove, 3-Drive mechanism, 31-Drive shaft, 32-First friction pressure plate, 321-Catching hole, 33-Drive motor, 4-First brake mechanism. 41-Sleeve, 42-Drive cylinder, 43-Second bearing, 44-Connecting disc, 441-Annular body, 442-Elastic sheet, 5-Second winding device, 51-Manual turntable, 52-Slide rail mechanism, 521-First slide rail, 5211-First sliding block, 522-Second slide rail, 5221-Second sliding block, 53-Second base plate, 54-Third bracket, 541-Third bracket, 542-Fourth bracket, 55-Third clamping plate, 551-Third clamping plate, 552-Fourth clamping plate, 56-First rotating shaft, 561-First rotating shaft, 562-Second rotating shaft, 57-Connecting column, 571-Receiving slot, 6-Second brake mechanism, 61-Friction wheel, 611-Receiving groove, 62-Fixing rod, 63-Metal sheet, 631-Friction pad, 632-Cushion spring, 71-Support pad, 72-Auxiliary support rod, 73-Locking component, 731-Locking hole, 732-Locking rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1-16 As shown, the fire truck disclosed in this invention includes a vehicle body 1, a first winding device 2, a drive mechanism 3, a first braking mechanism 4, a second winding device 5, a manual turntable 51, and a second braking mechanism 6.

[0019] The rear side of the vehicle body 1 is provided with a first slot 111 and a second slot 112 at intervals. The rear side of the vehicle body 1 is provided with a first protective body for covering the first slot 111 and a second protective body for covering the second slot 112. The horizontal plane of the bottom wall of the first slot 111 is lower than the horizontal plane of the bottom wall of the second slot 112. The second slot 112 is located above the rear wheel of the vehicle body 1. The rear wall of the rear end of the vehicle body 1 is also provided with an outlet 13 that communicates with the first slot 111 and is used to output water hose.

[0020] It should be understood that the first slot 111 and the second slot 112 are spaced apart and located on the same side of the rear end of the vehicle body 1, respectively accommodating the first winding device 2 and the second winding device 5, achieving zoned arrangement and avoiding mutual interference during winding operations. The first and second protective bodies are height-adjustable; when not in use, they are lowered to enclose the slots, providing dust, rain, and collision protection; when in use, they are raised to expose the operating space. The output port 13 is connected to the first slot 111, allowing the water hose on the first winding device 2 to be directly pulled out and laid without additional detours or bends, making it convenient and quick to access.

[0021] In addition, the other side of the rear end of the vehicle body 1 is also provided with a third slot symmetrical to the first slot 111 and a fourth slot symmetrical to the second slot 112. The rear wall of the rear end of the vehicle body 1 is also provided with an outlet that communicates with the third slot and is used to output the water hose. The third slot and the fourth slot also accommodate the first winding device 2 and the second winding device 5, so that the entire fire truck has four water hose winding devices.

[0022] The first winding device 2 is installed on the bottom wall of the first slot 111 and is used to wind up the water hose.

[0023] The drive mechanism 3 is located in the first slot 111 and is used to drive the first winding device 2 to rotate.

[0024] The first braking mechanism 4 is installed in the first winding device 2 and is used to control the first winding device 2 to not rotate.

[0025] It should be understood that the first winding device 2 is fixed to the bottom wall of the first slot 111, and the drive mechanism 3 provides rotational torque to realize the automatic recovery and unwinding of the water hose, reducing the labor intensity of operators and increasing the winding speed. The first braking mechanism 4 controls the pressing and separating of the friction pressure plate to realize the on / off of power transmission from the drive mechanism 3 to the first winding device 2. When it is necessary to stop winding, the power path is cut off, realizing instant start and stop control, which is simple to operate and responds quickly.

[0026] The second winding device 5 is movably disposed on the bottom wall of the second slot 112 for winding up the water hose.

[0027] The manual turntable 51 is located on one side of the second winding device 5 and is used to drive the second winding device 5 to rotate.

[0028] The second braking mechanism 6 is located on the other side of the second winding device 5 and is used to brake the rotation of the second winding device 5 so that it rotates slowly.

[0029] It should be understood that the second winding device 5 is movably mounted on the bottom wall of the second slot 112 via the slide rail mechanism 52. When pulled out, it facilitates manual operation and hose loading / unloading; when pushed in, it is stored within the second slot 112 and enclosed and protected by the second protective body, balancing operational convenience and storage safety. The manual turntable 51 is located outside the second winding device 5. Operators can rotate the turntable 51 to drive the winding device, allowing for independent winding and unwinding operations without relying on a power source, offering flexibility. The second braking mechanism 6 is located on the opposite side of the manual turntable 51. By applying continuous resistance to the rotating components, it maintains a stable rotation speed during manual operation, preventing uncontrolled acceleration of the reel due to the hose's own weight or excessively fast operation, thus ensuring operational safety.

[0030] In this embodiment, the first winding device 2 includes a first base plate 21, a first bracket 22, a second bracket 222, a first clamping plate 23, a second clamping plate 232, a drive rod 24, and a control mechanism 25.

[0031] The first base plate 21 is rectangular and is disposed on the bottom wall of the first slot 111. It should be understood that the first base plate 21 is fixedly disposed on the bottom wall of the first slot 111.

[0032] The first bracket 22 is located on one side of the first base plate 21.

[0033] The second bracket 222 is located on the other side of the first base plate 21.

[0034] It should be understood that the first base plate 21 fixes the first bracket 22 and the second bracket 222 on its two sides respectively, so that a stable installation space is formed between the two brackets to accommodate the first clamping plate 23, the second clamping plate 232 and the wound water hose, ensuring the stability of the overall structure of the first winding device 2.

[0035] A connecting cylinder 26 is fixedly arranged between the first clamping plate 23 and the second clamping plate 232. The driving mechanism 3 includes a driving shaft 31, which passes through the top end of the first bracket 22 and the first clamping plate 23 and is located inside the connecting cylinder 26. One end of the driving shaft 31 is provided with a first friction pressure plate 32 located inside the connecting cylinder 26.

[0036] It should be understood that the connecting cylinder 26, as a rigid connecting component, connects the first clamping plate 23 and the second clamping plate 232 into an integral rotating winding frame, enabling the two to rotate synchronously. At the same time, the connecting cylinder 26 houses the drive shaft 31 inside, forming a physical barrier between the drive shaft 31 and the external water hose, preventing the water hose from touching the drive shaft and becoming entangled during the winding process.

[0037] It is worth noting that the drive shaft 31 is inserted into the first clamping plate 23 through the motor bearing. That is, the inner ring of the motor bearing is fixedly connected to the drive shaft 31, and the outer ring of the motor bearing is fixedly connected to the first clamping plate 23, so that the drive shaft 31 can rotate freely relative to the first clamping plate 23. At the same time, the drive shaft 31 provides radial support to the first clamping plate 23 through the motor bearing.

[0038] One end of the drive rod 24 passes through the top of the second bracket 222, and the other end of the drive rod 24 passes through the second clamping plate 232 and is located inside the connecting cylinder 26. The other end of the drive rod 24 is provided with a second friction pressure plate 27 located inside the connecting cylinder 26 and used to press against the first friction pressure plate 32.

[0039] It should be understood that the other end of the drive rod 24 is provided with a second friction pressure plate 27 located inside the connecting cylinder 26. The first friction pressure plate 32 and the second friction pressure plate 27 achieve power transmission through the frictional force generated by pressing, transmitting the torque of the drive mechanism 3 to the drive rod 24 and the second clamping plate 232 connected thereto, ultimately driving the first winding device 2 to rotate synchronously. That is to say, when the first friction pressure plate 32 and the second friction pressure plate 27 are tightly connected, the first friction pressure plate 32 and the second friction pressure plate 27 rotate synchronously, so that the drive mechanism 3 drives the second friction pressure plate 27 to rotate through the first friction pressure plate 32, thereby driving the first clamping plate 23 and the second clamping plate 232 to rotate.

[0040] The control mechanism 25 is connected to the second clamping plate 232 and is provided with a handle 251 for controlling the movement of the drive rod 24 so as to drive the second friction pressure plate 27 on the drive rod 24 to move.

[0041] It should be understood that the control mechanism 25 controls the axial movement of the drive rod 24 via the handle 251, thereby driving the second friction pressure plate 27 to move, realizing the clamping or separation of the second friction pressure plate 27 from the first friction pressure plate 32. When it is necessary to wind up the hose, the operating handle 251 clamps the two friction pressure plates together, and the power is connected. The drive mechanism 3 can then drive the first clamping plate 23 and the second clamping plate 232 to rotate to achieve automatic hose winding. When it is necessary to stop winding or replace the hose, the operating handle 251 separates the two friction pressure plates, and the power is disconnected.

[0042] Preferably, the first clamping plate 23 and the second clamping plate 232 are both circular in shape, wherein the first support 22 and the second support 222 are symmetrically arranged, the first clamping plate 23 and the second clamping plate 232 are symmetrically arranged, and the first clamping plate 23 and the second clamping plate 232 are located between the first support 22 and the second support 222.

[0043] It should be understood that the circular clamping plate has no protruding edges or corners on its outer periphery during rotation, which can avoid motion interference with surrounding components and make the rotation more stable. The first support 22 and the second support 222 are symmetrically arranged, and the first clamping plate 23 and the second clamping plate 232 are symmetrically arranged, so that the rotation shaft and the drive rod 24 are subjected to forces that tend to be balanced at both ends. This helps to maintain the centering of the rotation axis and enhances the overall structure's ability to resist off-center loads. This symmetrical layout effectively reduces the sway and vibration of the first winding device 2 caused by uneven force, and further improves the operational stability of the first winding device 2.

[0044] Preferably, the first clamping plate 23 and the second clamping plate 232 are located between the first support 22 and the second support 222, wherein the first friction plate 32 and the second friction plate 27 are both circular in shape, and friction structures are provided between the opposing surfaces of the first friction plate 32 and the second friction plate 27.

[0045] It should be understood that the outer diameters of the first friction plate 32 and the second friction plate 27 are equal, or the outer diameter of the first friction plate 32 is larger than that of the second friction plate 27, while the aperture of the connecting cylinder 26 is larger than the outer diameters of both the first and second friction plates 32. The friction structure increases the friction between the contact surfaces of the two friction plates, improves the reliability of power transmission, and enables the drive mechanism 3 to transmit stronger torque for winding the hose, preventing slippage under high load conditions. The friction structure can be any structure that increases the friction of the contact surfaces, such as a concave-convex structure, knurling, grooves, or friction plates; this invention does not specifically limit this.

[0046] Furthermore, in other embodiments, one of the sides of the first friction plate 32 facing the second friction plate 27 and the side of the second friction plate 27 facing the first friction plate 32 is provided with a plurality of locking holes 321, and the other of the sides of the first friction plate 32 facing the second friction plate 27 and the side of the second friction plate 27 facing the first friction plate 32 is provided with a plurality of locking rods 271 inserted and locked in the locking holes 321.

[0047] It should be understood that when the first friction plate 32 and the second friction plate 27 are pressed together, the locking rod 271 is precisely inserted into the corresponding locking hole 321, forming a fitted mechanical engagement. This effectively prevents relative rotation between the first friction plate 32 and the second friction plate 27 during torque transmission, achieving a more stable and reliable torque transmission. It is worth noting that the diameter of the locking hole 321 is larger than the outer diameter of the locking rod 271, allowing the locking rod 271 to be easily inserted into the locking hole 321.

[0048] Of course, in order to make it easier to insert the locking rod 271 into the locking hole 321, the port of the locking hole 321 is provided with an inclined surface.

[0049] Preferably, an arc-shaped plate 28 located outside the connecting cylinder 26 is fixedly disposed between the first clamping plate 23 and the second clamping plate 232. The arc-shaped plate 28 is semi-circular, and the arc-shaped plate 28 and the outer wall of the connecting cylinder 26 form an arc-shaped receiving groove 281.

[0050] It should be understood that most hoses have a connecting joint at one end. Before winding the hose, the joint at one end can be placed into the receiving clamp 281 and clamped and fixed to achieve quick positioning and reliable clamping of the hose end, preventing the hose end from slipping off during the winding process. When winding the hose, the hose is wound layer by layer with the outer wall of the arc plate 28 as the inner support surface, completing the automatic winding.

[0051] Furthermore, the top end of the first bracket 22 is provided with a first through hole 2211, in which a first bearing 2212 is provided, and the drive shaft 31 passes through the first bearing 2212. The top end of the second bracket 222 is provided with a second through hole 2221, in which a linear rotating bushing 2222 is provided, and one end of the drive rod 24 passes through the linear rotating bushing 2222.

[0052] It should be understood that the first bearing 2212 supports and fixes the drive shaft 31 while effectively reducing the frictional resistance when the drive shaft 31 rotates. The linear rotating bushing 2222 provides radial support for the drive rod 24 and allows the drive rod 24 to rotate and move axially within it, providing a motion basis for the control mechanism 25 to adjust the clamping and separation of the first friction plate 32 and the second friction plate 27.

[0053] Of course, the linear rotating bushing 2222 in this embodiment can also be replaced with a third bearing, that is, the third bearing is set in the second through hole 2221, and one end of the drive rod 24 passes through the third bearing, that is, one end of the drive rod 24 can rotate in the third bearing or move in the third bearing.

[0054] In this embodiment, the drive mechanism 3 further includes a power take-off (PTO) disposed within the vehicle body 1, a drive motor 33 disposed within the vehicle body 1, a first transmission gear mechanism for connecting the PTO and the other end of the drive shaft 31 to allow the PTO to drive the drive shaft 31 to rotate, and a second transmission gear mechanism for connecting the rotating shaft of the drive motor 33 and the other end of the drive shaft 31 to allow the drive motor 33 to drive the drive shaft 31 to rotate. When there is an external power input, the rotating shaft of the drive motor 33 is connected to the other end of the drive shaft 31 through the second transmission gear mechanism (e.g., manually connecting the rotating shaft of the drive motor 33 to the other end of the drive shaft 31 through the second transmission gear mechanism) to drive the first winding device 2 to rotate through the drive motor 33. When there is no external power input, the PTO is connected to the other end of the drive shaft 31 through the first transmission gear mechanism (e.g., manually connecting the PTO to the other end of the drive shaft 31 through the first transmission gear mechanism) to drive the first winding device 2 to rotate through the power take-off of the fire truck.

[0055] It should be understood that the power take-off (PTO) is integrated into the fire truck, while the drive motor 33 can be powered by an external power source. Both are connected to the drive shaft 31 via a first transmission gear mechanism and a second transmission gear mechanism, respectively. When an external power source is available at the rescue site, the drive motor 33 is used first to rotate the first winding device 2, reducing the wear and tear from prolonged engine idling. When there is no external power source or the external power supply is interrupted, the system switches to PTO drive mode, utilizing the vehicle's own engine power to continue the winding operation. This dual-power-source backup design ensures that the first winding device 2 receives reliable power under different operating conditions, preventing interruptions in the winding operation due to the failure of a single power source, and significantly improving the device's adaptability and reliability.

[0056] In addition, the first and second transmission gear mechanisms can be implemented using products in the prior art, which will not be elaborated here. For example, the power take-off shaft is provided with a first gear, and the other end of the drive shaft 31 is provided with a second gear. The first transmission gear mechanism may include multiple third gears that allow the first and second gears to mesh with each other (for example, multiple insert rods are rotatably arranged in the bottom wall of the first slot, and the third gears can be inserted into the insert rods, or these third gears can be manually placed on the insert rods to allow the first and second gears to mesh). For example, the rotating shaft of the drive motor 33 is provided with a fourth gear. The second transmission gear mechanism may include multiple fifth gears that allow the second and fourth gears to mesh with each other (for example, multiple insert rods are rotatably arranged in the bottom wall of the first slot, and the fifth gears can be inserted into the insert rods, or these fifth gears can be manually placed on the insert rods to allow the fourth and second gears to mesh).

[0057] Alternatively, the first transmission gear mechanism includes a first driving gear, a first driven gear, and a first clutch, while the second transmission gear mechanism includes a second driving gear, a second driven gear, and a second clutch. The first and second driven gears are arranged sequentially along the axial direction of the drive shaft 31, each loosely fitted onto the other end of the drive shaft 31 via its corresponding bearing, allowing free rotation relative to the drive shaft 31. The first driving gear is fixedly fitted onto the output shaft of the power take-off (PTO) and is in constant mesh with the first driven gear. The second driving gear is fixedly fitted onto the rotating shaft of the drive motor 33 and is in constant mesh with the second driven gear. The driving part of the first clutch is fixedly connected to the first driven gear, and the driven part of the first clutch is fixedly fitted onto the drive shaft 31 via a key connection. The driving part of the second clutch is fixedly connected to the second driven gear, and the driven part of the second clutch is fixedly fitted onto the drive shaft 31 via a key connection. The PTO and the drive motor 33 are staggered along the axial direction of the drive shaft 31, with the PTO corresponding to the axial position of the first driven gear and the drive motor 33 corresponding to the axial position of the second driven gear; their positions do not conflict.

[0058] When the first clutch is engaged, its driving and driven parts are integrated. The first driven gear drives the drive shaft 31 to rotate synchronously through the first clutch. The power from the power take-off (PTO) is transmitted to the drive shaft 31 via the first driving gear, the first driven gear, and the first clutch. When the first clutch is disengaged, its driving and driven parts are separated, and the first driven gear continues to spin freely on the drive shaft 31, cutting off the power transmission path. When the second clutch is engaged, its driving and driven parts are integrated. The second driven gear drives the drive shaft 31 to rotate synchronously through the second clutch. The power from the drive motor 33 is transmitted to the drive shaft 31 via the second driving gear, the second driven gear, and the second clutch. When the second clutch is disengaged, its driving and driven parts are separated, and the second driven gear continues to spin freely on the drive shaft 31, cutting off the power transmission path. When there is an external power input, the first clutch disengages and the second clutch engages, driving the first winding device 2 to rotate via the drive motor 33. When there is no external power input, the second clutch disengages and the first clutch engages, driving the first winding device 2 to rotate via the PTO.

[0059] In this embodiment, the first braking mechanism 4 includes a sleeve 41, a drive cylinder 42, a second bearing 43, and a connecting disc 44.

[0060] The sleeve 41 is fitted over the drive rod 24, and the sleeve 41 is fixedly connected to the top end of the second bracket 222. That is to say, the sleeve 41 is fixedly set at the top end of the second bracket 222 and cannot be rotated.

[0061] The drive cylinder 42 is sleeved outside the sleeve 41, and the handle 251 is fixedly connected to the drive cylinder 42, so that the drive cylinder 42 can be rotated by the handle 251.

[0062] Preferably, the drive cylinder 42 is threadedly connected to the sleeve 41, so that when the drive cylinder 42 is rotated by the handle 251, the drive cylinder 42 moves relative to the sleeve 41.

[0063] The second bearing 43 is fixedly sleeved on the outside of the drive rod 24, wherein the outer ring of the second bearing 43 is fixedly connected to the drive cylinder 42.

[0064] In other words, the inner ring of the second bearing 43 rotates synchronously with the drive rod 24, while the outer ring of the second bearing 43 rotates synchronously with the drive cylinder 42.

[0065] It should be understood that the top of the sleeve 41 is fixedly connected to the second bracket 222, providing a stable threaded connection foundation for the drive cylinder 42, while not affecting the rotation and axial movement of the drive rod 24 inside it. The drive cylinder 42 is sleeved outside the sleeve 41 and the two are threadedly engaged. When the operator rotates the drive cylinder 42 through the handle 251, the drive cylinder 42 converts its rotational motion into linear motion along the axial direction of the sleeve 41. Since the outer ring of the second bearing 43 is fixedly connected to the drive cylinder 42 and the inner ring is fixedly connected to the drive rod 24, the axial movement of the drive cylinder 42 is transmitted to the drive rod 24 through the second bearing 43, thereby pushing the drive rod 24 to move axially, realizing the pressing and separation of the friction pressure plate.

[0066] It is worth noting that the axial length of the drive cylinder 42 should be greater than the distance between the first friction plate 32 and the second friction plate 27 when they separate, so as to ensure that the drive cylinder 42 always maintains effective cooperation with the sleeve 41 during axial movement and will not come off the sleeve 41.

[0067] The connecting plate 44 is fixedly connected to the second clamping plate 232, wherein the drive rod 24 passes through the connecting plate 44, and the center of the connecting plate 44 is fixedly connected to the inner ring of the second bearing 43.

[0068] It should be understood that when the drive rod 24 is driven to rotate by the second friction pressure plate 27, the torque is transmitted to the connecting plate 44 through the inner ring of the second bearing 43. The connecting plate 44 then drives the second clamping plate 232 fixed thereto to rotate synchronously, and then drives the first clamping plate 23 to rotate together through the connecting cylinder 26. Finally, the rotation of the overall rotating frame composed of the first clamping plate 23, the second clamping plate 232 and the connecting cylinder 26 is realized, and the water hose is wound or unwound.

[0069] Preferably, the connecting disc 44 is circular in shape, and includes an annular body 441 and a plurality of elastic plates 442. The annular body 441 is connected to the second clamping plate 232 by a threaded connection, and one end of each elastic plate 442 is fixedly disposed on the side wall of the inner hole of the annular body 441. The other end of the plurality of elastic plates 442 forms a circular opening and is fixedly connected to the inner ring of the second bearing 43. The drive rod 24 passes through the opening.

[0070] It should be understood that the torque transmitted to the drive rod 24 is transmitted to the second clamping plate 232 via the inner ring of the second bearing 43, the elastic plate 442, and the ring body 441. The elastic plate 442 has a certain elastic deformation capability. When there is an installation error or coaxiality deviation between the rotation center of the drive rod 24 and the rotation center of the clamping plate, the elastic plate 442 can absorb the deviation through its own deformation, avoiding jamming, vibration, or excessive bearing wear caused by rigid connection, making the power transmission smoother, and improving the stability and service life of the device.

[0071] In this embodiment, the second winding device 5 includes a first slide rail 521, a second slide rail 522, a second base plate 53, a third bracket 54, a fourth bracket 542, a third clamping plate 55, and a fourth clamping plate 552.

[0072] The first slide rail 521 and the second slide rail 522 are spaced apart on the bottom wall of the first slot 111, wherein the first slide rail 521 is provided with a first sliding block 5211 and the second slide rail 522 is provided with a second sliding block 5221.

[0073] It should be understood that the first slide rail 521 and the second slide rail 522 are spaced apart on the bottom wall of the first slot 111, providing a guide path for the second winding device 5 to translate in a fixed direction. The first sliding block 5211 and the second sliding block 5221 are respectively installed on the corresponding slide rails and can slide along the slide rails, so that the second base plate 53 and the third bracket 54, the fourth bracket 542, the third clamping plate 55 and the fourth clamping plate 552 installed on it can move as a whole along the slide rail direction, so as to realize the second winding device 5 moving outward or inward from the first slot 111, which facilitates the loading and unloading of the hose, the daily maintenance of the device and the repair operation in case of failure.

[0074] The second base plate 53 is disposed on the first sliding block 5211 and the second sliding block 5221.

[0075] It should be understood that the second base plate 53 is fixedly installed between the first sliding block 5211 and the second sliding block 5221, unifying the sliding motion of the two sliders into the translational motion of the entire second winding device 5; when it is necessary to manually wind up the hose, the second winding device 5 can be pulled out along the slide rail to the outside of the vehicle body 1, making the operating space more open and avoiding interference of the vehicle body 1 structure with the operating action; after winding is completed, the second winding device 5 is pushed into the first slot 111 for storage, realizing the winding and unwinding of the hose on the fire truck, saving space.

[0076] The third bracket 54 is located on one side of the second base plate 53.

[0077] The fourth bracket 542 is located on the other side of the second base plate 53.

[0078] It should be understood that the second base plate 53 fixes the third bracket 54 and the fourth bracket 542 on its two sides respectively, so that a stable installation space is formed between the two brackets to accommodate the third clamping plate 55, the fourth clamping plate 552 and the wound water hose, ensuring the stability of the overall structure of the winding device.

[0079] The manual turntable 51 is located outside the top of the third bracket 54 and is fixedly connected to the first rotating shaft 56 of the third clamping plate 55 so as to drive the third clamping plate 55 to rotate through the manual turntable 51.

[0080] It should be understood that by rotating the manual turntable 51, the operator can transmit torque through the first rotating shaft 56 to the third clamping plate 55, thereby driving the water hose wound on the connecting column 57 to rotate, realizing the winding and unwinding of the water hose. The diameter of the manual turntable 51 is larger than the diameter of the first rotating shaft 56, and the lever arm of the operator acting on the edge of the manual turntable 51 is larger than the radius of the first rotating shaft 56, thereby generating a larger torque on the first rotating shaft 56, making the rotation operation more labor-saving and convenient.

[0081] The outer wall of the third clamping plate 55 is provided with a first rotating shaft 56, wherein the first rotating shaft 56 is rotatably mounted on the top of the third bracket 54.

[0082] It should be understood that the first rotating shaft 56 serves as a rotating support for the third clamping plate 55, enabling the third clamping plate 55 to rotate smoothly around the axis of the first rotating shaft 56 under the drive of external force, thereby realizing the winding or unwinding action of the water hose.

[0083] The fourth clamping plate 552 is connected to the third clamping plate 55 via a connecting post 57. The outer side wall of the fourth clamping plate 552 is provided with a second rotating shaft 562, which is rotatably mounted on the top of the fourth bracket 542. The third clamping plate 55 and the fourth clamping plate 552 are located between the third bracket 54 and the fourth bracket 542.

[0084] It should be understood that the connecting column 57 connects the third clamping plate 55 and the fourth clamping plate 552 into one unit, so that the two rotate synchronously. At the same time, the connecting column 57 itself can serve as the inner core for the water hose winding, and the water hose is wound on the connecting column 57 between the third clamping plate 55 and the fourth clamping plate 552. The second rotating shaft 562 is rotatably set at the top of the fourth bracket 542, and together with the first rotating shaft 56, it forms a rotating system with two-end support, ensuring that the first rotating shaft 56 and the second rotating shaft 562 are on the same axis of rotation, so that the water hose will not wobble during rotation and improve the stability of rotation.

[0085] The second braking mechanism 6 is mounted on the fourth bracket 542 and is equipped with a friction plate 631 for decelerating the second rotating shaft 562 of the fourth clamping plate 552.

[0086] It should be understood that the frictional resistance generated by the friction plate 631 gripping the friction wheel 61 is transmitted to the fourth clamping plate 552 through the friction wheel 61 fixed on the second rotating shaft 562. This effectively suppresses the accelerated rotation of the water hose due to its large weight and strong inertia, keeping the speed of the winding and unwinding process stable and controllable, and preventing the water hose from going out of control due to excessive rotation speed. At the same time, this continuous frictional resistance can also prevent the water hose from rotating and loosening due to its own weight or winding tension when the manual turntable 51 is released during winding or unwinding, making the operation safer and more reliable.

[0087] Furthermore, the connecting post 57 is provided with a semi-circular receiving slot 571 for receiving the connector of the water hose.

[0088] It should be understood that the ends of the hose are equipped with connectors to facilitate connection with the outlets of other hoses or pumps. When winding the hose, the connectors are embedded in the receiving slots 571 to allow the hose to be stably received between the third clamp 55 and the fourth clamp 552. This also prevents the connectors from occupying winding space, facilitates the initial fixing of the hose winding, and prevents the connectors from swinging or getting stuck during the winding process.

[0089] Preferably, the receiving slot 571 is semi-circular. It should be understood that the inner wall of the semi-circular receiving slot 571 is smooth and without sharp corners, which can fit well with the cylindrical connector, avoid scratching the connector, and facilitate the quick insertion and removal of the connector, making the operation more convenient and efficient.

[0090] In this embodiment, the second braking mechanism 6 includes a friction wheel 61, a fixed rod 62, and a metal plate 63.

[0091] Friction wheel 61 is fixedly mounted on the outside of second rotating shaft 562. It should be understood that friction wheel 61 is fixedly mounted on second rotating shaft 562 and rotates synchronously with it. When braking, friction plate 631 grips the outer circumferential surface of friction wheel 61, and the friction between the two generates a braking effect on second rotating shaft 562.

[0092] The fixing rod 62 is mounted on the second bracket 222. It should be understood that the fixing rod 62 is located below the friction wheel 61, and the fixing rod 62 provides a stable support point for the metal sheet 63 and its two ends, ensuring that the position of the metal sheet 63 remains unchanged and the force is reliable during operation.

[0093] The metal sheet 63 is long and rectangular, and is arranged around the friction wheel 61. The two ends of the metal sheet 63 are arranged on the fixed rod 62, and the friction plate 631 is arranged inside the metal sheet 63 and is in close contact with the friction wheel 61.

[0094] It should be understood that the metal sheet 63 surrounds the outer periphery of the friction wheel 61, and its two ends are fixed to the fixed rod 62 to form a clamp structure, which presses the inner friction sheet 631 against the surface of the friction wheel 61; when the friction wheel 61 rotates with the second rotating shaft 562, sliding friction is generated between the friction sheet 631 and the friction wheel 61, thereby achieving deceleration and braking of the second rotating shaft 562.

[0095] Preferably, the friction plate 631 is in the shape of a long rectangular strip, the width of the friction plate 631 is equal to the width of the metal plate 63, and the length of the friction plate 631 is less than the length of the metal plate 63.

[0096] It should be understood that the width of the friction plate 631 is equal to the width of the metal plate 63, so that the friction plate 631 can completely fit the inner surface of the metal plate 63, ensuring that there is sufficient contact area between the friction plate 631 and the friction wheel 61, thereby providing stable frictional resistance.

[0097] Furthermore, the friction wheel 61 is provided with an annular friction plate receiving groove 611, and the metal plate 63 and the friction plate 631 are disposed in the friction plate receiving groove 611. One end of the metal plate 63 is fixedly disposed on the fixing rod 62, and the other end of the metal plate 63 is fixedly disposed on the fixing rod 62 by a buffer spring 632.

[0098] It should be understood that the receiving groove 611 provides a limiting installation space for the metal plate 63 and the friction plate 631, preventing the metal plate 63 and the friction plate 631 from moving or falling out in the axial direction, making the structure of the second braking mechanism 6 more compact and reliable, while ensuring that the friction plate 631 and the friction wheel 61 always maintain the correct contact position. The buffer spring 632 provides a continuous elastic tension to the metal plate 63, so that the metal plate 63 always tends to tighten towards the friction wheel 61, thereby ensuring that the friction plate 631 and the friction wheel 61 maintain a tight contact for a long time. When the friction plate 631 wears due to long-term use or the gap increases due to temperature changes, the buffer spring 632 can automatically contract to compensate for the gap by its own elasticity, so that the pressure between the friction plate 631 and the friction wheel 61 remains stable within a certain range, extending the service life of the second braking mechanism 6.

[0099] Preferably, the first sliding block 5211 and the second sliding block 5221 are both elongated, and the second base plate 53 is fixedly disposed between the first sliding block 5211 and the second sliding block 5221. A support pad 71 located below the second slot 112 is rotatably disposed on one side of the rear end of the vehicle body 1. The second base plate 53 is slidably disposed directly above the support pad 71. An auxiliary support rod 72 for supporting the support pad 71 is rotatably disposed on the bottom wall of one side of the second base plate 53, and the length of the auxiliary support rod 72 is equal to the distance between the second base plate 53 and the support pad 71.

[0100] It should be understood that the support pad 71 is rotatably mounted at the rear end of the vehicle body 1 and located below the second slot 112. When the second winding device 5 is pulled out along the slide rail, the support pad 71 can be flipped outward and unfolded, placing it directly below the second base plate 53, providing a supporting base for the second base plate 53 extending out of the vehicle body 1. One end of the auxiliary support rod 72 is rotatably mounted on the bottom wall of the second base plate 53. When the second base plate 53 is pulled out into position, the auxiliary support rod 72 is flipped downward to a vertical position, so that its bottom end is supported on the support pad 71, providing stable vertical support for the second base plate 53 and preventing the second base plate 53 from shaking or tilting due to force when the manual turntable 51 is operated, ensuring the stability of the manual winding operation. The length of the auxiliary support rod 72 is equal to the distance between the second base plate 53 and the support pad 71, ensuring that the auxiliary support rod 72 can be vertically supported between the two.

[0101] Preferably, the auxiliary support rod 72 is a hollow, elongated rectangular three-dimensional shape. One side of one end of the auxiliary support rod 72 is connected to the bottom wall of the second base plate 53 by a hinge. The top of the third bracket 54 is provided with a locking member 73. The locking member 73 has a locking hole 731 in the vertical direction. A locking rod 732 is inserted into the locking hole 731. The distance between the locking member 73 and the second base plate 53 is equal to or less than the length of the auxiliary support rod 72, so that the auxiliary support rod 72 can be locked on the third bracket 54 by inserting the locking rod 732 into the locking hole 731 and the inner hole of the other end of the auxiliary support rod 72.

[0102] It should be understood that when the auxiliary support rod 72 is not needed, it can be flipped upwards and retracted, aligning the opening at the other end of the auxiliary support rod 72 with the locking hole 731 of the locking member 73 at the top of the third bracket 54. Then, the locking rod 732 is inserted from top to bottom into the locking hole 731 and the opening of the auxiliary support rod 72, fixing the auxiliary support rod 72 to the third bracket 54 and preventing it from falling due to vibration during vehicle operation. When it needs to be unfolded, the locking rod 732 can be pulled out to release the auxiliary support rod 72 and flip it downwards to the support position. The distance between the locking member 73 and the second base plate 53 is equal to or less than the length of the auxiliary support rod 72, ensuring that the auxiliary support rod 72 reaches the locking position of the locking member 73 precisely when retracted.

[0103] Specific working principle: When the fire truck disclosed in this invention is in operation, its hose winding operation can be completed independently by the first winding device 2 and the second winding device 5. The two sets of devices are arranged in the first slot 111 and the second slot 112 at the rear end of the vehicle body 1, and do not interfere with each other.

[0104] When the first winding device 2 is needed to wind up the hose (at this time, the first winding device 2 is empty), the first protective body of the fire truck rises, exposing the operating space within the first slot 111. The operator places one end of the hose connector into the receiving clamp slot 281 and clamps it securely, ensuring reliable positioning of the hose end. Depending on the power conditions at the work site, the fire truck automatically or manually selects the drive mode. When external power is available, the second clutch engages, the first clutch remains disengaged, and the drive motor 33 is energized and operates. Its rotating shaft drives the second drive gear to rotate, which in turn drives the constantly meshed second driven gear. The rotation of the second driven gear is transmitted to the drive shaft 31 via the second clutch, causing the drive shaft 31 to rotate synchronously. When there is no external power or the external power is interrupted, the first clutch engages, the second clutch remains disengaged, and the fire truck's power take-off (PTO) utilizes the engine's power output, which drives the first drive gear via the output shaft. The first drive gear drives the first driven gear, which in turn is transmitted to the drive shaft 31 via the first clutch, causing the drive shaft 31 to rotate synchronously. After the drive shaft 31 rotates, the first friction pressure plate 32 at its other end rotates synchronously. The operator rotates the drive cylinder 42 through the handle 251. The drive cylinder 42 moves axially on the sleeve 41 through the threaded engagement. This movement is pushed by the second bearing 43 towards the first friction pressure plate 32, causing the second friction pressure plate 27 at the end of the drive rod 24 to press against the first friction pressure plate 32. The friction force transmits the torque of the drive shaft 31 to the drive rod 24. The drive rod 24 drives the second clamping plate 232 to rotate through the inner ring of the second bearing 43, the elastic plate 442, and the annular body 441. The second clamping plate 232 drives the first clamping plate 23 to rotate synchronously through the connecting cylinder 26. The water hose is wound layer by layer with the outer wall of the arc-shaped plate 28 as the inner support surface, completing the automatic winding. When the fire truck needs to stop winding, the operator reverses the handle 251, the drive cylinder 42 moves in the opposite direction, the drive rod 24 retracts axially, the second friction pressure plate 27 separates from the first friction pressure plate 32, the power transmission path is cut off, and the first winding device 2 immediately stops rotating. After winding is completed, the first protective body of the fire truck lowers, closing the first slot 111.

[0105] When the second winding device 5 is needed, the second protective body of the fire truck rises, exposing the operating space within the second slot 112. The operator pulls the second winding device 5 outward from the second slot 112 along the first slide rail 521 and the second slide rail 522. After pulling it out, the support pad 71 is flipped outward and unfolded directly below the second base plate 53. Then, the auxiliary support rod 72 is flipped downward to a vertical position, so that its bottom end is supported on the support pad 71, providing stable support for the second base plate 53 extending outside the vehicle body 1. The operator inserts the connector at the end of the hose into the receiving slot 571 on the connecting post 57 for fixation. By manually rotating the manual turntable 51, the manual turntable 51 drives the first rotating shaft 56 to rotate. The first rotating shaft 56 drives the third clamping plate 55 to rotate. The third clamping plate 55 drives the fourth clamping plate 552 to rotate synchronously through the connecting post 57. The hose is wound around the connecting post 57 between the third clamping plate 55 and the fourth clamping plate 552. During manual winding or unwinding, the second braking mechanism 6 on the fire truck continues to operate. The friction wheel 61 rotates synchronously with the second rotating shaft 562. The metal plate 63 maintains a tightening tendency under the elastic tension of the buffer spring 632, pressing the inner friction plate 631 into the friction plate receiving groove 611 of the friction wheel 61. A continuous and stable sliding friction force is generated between the friction plate 631 and the friction wheel 61. This friction force is transmitted to the second rotating shaft 562 through the friction wheel 61, and then to the fourth clamping plate 552. This effectively suppresses the inertial acceleration of the reel caused by the weight of the hose or excessively fast operation, keeping the winding and unwinding speed stable and controllable. It also prevents the hose from rotating and loosening when the manual turntable 51 is released. After winding is completed, the operator flips the auxiliary support rod 72 upward and inserts the locking rod 732 to lock it. The support pad 71 is flipped inward and retracted. The second winding device 5 is pushed into the second slot 112 along the slide rail. The second protective body of the fire truck is lowered, closing the second slot 112.

[0106] During firefighting and rescue operations, the first retractor 2 and the second retractor 5 of the fire truck can operate simultaneously, independently retracting hoses of different specifications or at different locations without interference, significantly improving the efficiency of the retracting operation. The first retractor 2 is power-driven, with fast retracting speed and labor-saving operation; the second retractor 5 is manually operated, flexible and mobile, and does not rely on any power source. The two retracting methods work together to enable the fire truck to efficiently and safely complete the hose retracting work in different operating scenarios.

[0107] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0108] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire truck, characterized in that, include: The vehicle body has a first slot and a second slot spaced apart on one side of its rear end. A first protective body for covering the first slot and a second protective body for covering the second slot are liftably and lowerably mounted on one side of the rear end of the vehicle body. The bottom wall of the first slot is lower than the bottom wall of the second slot. The second slot is located above the rear wheel of the vehicle body. The rear wall of the rear end of the vehicle body is also provided with an outlet for outputting water hoses that communicates with the first slot. The first winding device is installed on the bottom wall of the first slot and is used to wind up the water hose; A drive mechanism is disposed in the first slot and is used to drive the first winding device to rotate; A first braking mechanism is provided in the first winding device to control the first winding device from rotating. The second winding device is movably mounted on the bottom wall of the slot for winding up the water hose; A manual turntable is located on one side of the second winding device and is used to drive the second winding device to rotate; The second braking mechanism is located on the other side of the second winding device and is used to brake the rotation of the second winding device to slow it down.

2. The fire truck according to claim 1, characterized in that, The first winding device includes: The first base plate is rectangular in shape and is set on the bottom wall of the first slot; The first bracket is disposed on one side of the first base plate; The second bracket is located on the other side of the first base plate; First clamping plate; The second clamping plate, wherein a connecting cylinder is fixedly provided between the first clamping plate and the second clamping plate, wherein the driving mechanism includes a driving shaft, the driving shaft passes through the top end of the first bracket and the first clamping plate and is located inside the connecting cylinder, and one end of the driving shaft is provided with a first friction pressure plate located inside the connecting cylinder; A drive rod, one end of which passes through the top of the second bracket and the other end passes through the second clamping plate and is located inside the connecting cylinder, wherein the other end of the drive rod is provided with a second friction pressure plate located inside the connecting cylinder and used to press against the first friction pressure plate; The control mechanism, connected to the second clamping plate, is provided with a handle for controlling the movement of the drive rod, so as to drive the second friction pressure plate on the drive rod to move.

3. The fire truck according to claim 2, characterized in that, The first clamping plate and the second clamping plate are located between the first support and the second support. The first friction pressure plate and the second friction pressure plate are both circular. Friction structures are provided between the opposing surfaces of the first friction pressure plate and the second friction pressure plate. An arc-shaped plate is fixedly provided between the first clamping plate and the second clamping plate, located outside the connecting cylinder. The arc-shaped plate and the outer wall of the connecting cylinder form an arc-shaped receiving groove. The top end of the first support is provided with a first through hole, in which a first bearing is provided. The drive shaft passes through the first bearing. The top end of the second support is provided with a second through hole, in which a linear rotating bushing is provided. One end of the drive rod passes through the linear rotating bushing.

4. The fire truck according to claim 3, characterized in that, The drive mechanism further includes a power take-off (PTO) disposed within the vehicle body, a drive motor disposed within the vehicle body, a first transmission gear mechanism for connecting the PTO and the other end of the drive shaft to allow the PTO to drive the drive shaft to rotate, and a second transmission gear mechanism for connecting the rotating shaft of the drive motor and the other end of the drive shaft to allow the drive motor to drive the drive shaft to rotate. When there is an external power input, the second transmission gear mechanism connects the rotating shaft of the drive motor and the other end of the drive shaft to drive the first winding device to rotate. When there is no external power input, the first transmission gear mechanism connects the PTO and the other end of the drive shaft to drive the first winding device to rotate via the PTO of the fire truck.

5. The fire truck according to claim 4, characterized in that, The first braking mechanism includes: A sleeve is fitted over the drive rod, wherein the sleeve is fixedly connected to the top end of the second bracket; A drive cylinder is sleeved outside the sleeve, wherein the handle is fixedly connected to the drive cylinder; The second bearing is fixedly sleeved on the outside of the drive rod, wherein the outer ring of the second bearing is fixedly connected to the drive cylinder; A connecting plate is fixedly connected to the second clamping plate, wherein the drive rod passes through the connecting plate, and the center of the connecting plate is fixedly connected to the inner ring of the second bearing; The drive cylinder is threadedly connected to the sleeve.

6. The fire truck according to claim 5, characterized in that, The connecting disc is circular in shape, and includes an annular body and multiple elastic plates. The annular body is connected to the second clamping plate by a threaded connection. One end of each elastic plate is fixedly disposed on the side wall of the inner hole of the annular body, and the other end of the multiple elastic plates forms a circular opening and is fixedly connected to the inner ring of the second bearing. The drive rod passes through the opening.

7. The fire truck according to claim 1, characterized in that, The second winding device includes: A first slide rail and a second slide rail are spaced apart on the bottom wall of the first slot, wherein the first slide rail is provided with a first sliding block and the second slide rail is provided with a second sliding block; A second base plate is disposed on the first sliding block and the second sliding block; The third bracket is disposed on one side of the second base plate, wherein the manual turntable is disposed outside the top of the third bracket and is fixedly connected to the first rotating shaft of the third clamping plate, so as to drive the third clamping plate to rotate through the manual turntable; The fourth bracket is located on the other side of the second base plate; The third clamping plate has a first rotating shaft on its outer side wall, wherein the first rotating shaft is rotatably mounted on the top of the third bracket; The fourth clamping plate is connected to the third clamping plate via a connecting post. The outer wall of the fourth clamping plate is provided with a second rotating shaft, which is rotatably mounted on the top of the fourth bracket. The third and fourth clamping plates are located between the third and fourth brackets. The second braking mechanism is mounted on the fourth bracket and is provided with friction plates for decelerating the second rotating shaft of the fourth clamping plate. The connecting post is provided with a semi-circular receiving slot for receiving the connector of the water hose.

8. The fire truck according to claim 7, characterized in that, The second braking mechanism includes: The friction wheel is fixedly mounted outside the second rotating shaft; A fixing rod is mounted on the fourth bracket; A metal sheet, in the shape of a long rectangular strip, is arranged around the outside of the friction wheel. The two ends of the metal sheet are set on the fixed rod. The friction plate is arranged inside the metal sheet and is in close contact with the friction wheel. The friction plate is in the shape of a long rectangular strip, and the width of the friction plate is equal to the width of the metal sheet. The friction wheel is provided with a circular friction plate receiving groove. The metal plate and the friction plate are disposed in the friction plate receiving groove. One end of the metal plate is fixedly disposed on the fixed rod, and the other end of the metal plate is fixedly disposed on the fixed rod by a buffer spring.

9. The fire truck according to claim 7, characterized in that, Both the first sliding block and the second sliding block are elongated. The second base plate is fixedly disposed between the first sliding block and the second sliding block. A support pad is rotatably disposed on one side of the rear end of the vehicle body, located below the second slot. The second base plate is slidably disposed directly above the support pad. An auxiliary support rod is rotatably disposed on the bottom wall of one side of the second base plate for supporting the support pad. The length of the auxiliary support rod is equal to the distance between the second base plate and the support pad.

10. The fire truck according to claim 9, characterized in that, The auxiliary support rod is a hollow, elongated rectangular three-dimensional shape. One side of one end of the auxiliary support rod is connected to the bottom wall of one side of the second base plate by a hinge. The top of the third bracket is provided with a locking member. The locking member has a locking hole in the vertical direction. A locking rod is inserted into the locking hole. The distance between the locking member and the second base plate is equal to or less than the length of the auxiliary support rod, so that the auxiliary support rod can be locked on the third bracket by inserting the locking rod into the locking hole and the inner hole of the other end of the auxiliary support rod.

Images