Fire-fighting machine bomb dropping device

Abstract

The utility model discloses a bomb dropping device of a fire-fighting machine, and relates to the technical field of fire-fighting machines. The device comprises a trajectory, a first driving mechanism and a second driving mechanism, the first driving mechanism and the second driving mechanism are arranged in the trajectory, the trajectory comprises a bomb dropping opening, the second driving mechanism is close to the bomb dropping opening, and the first driving mechanism is far away from the bomb dropping opening; the trajectory is used for containing fire extinguishing bombs. According to the embodiment of the invention, a proper bomb dropping mode can be selected, the first driving mechanism and the second driving mechanism can be controlled to be closed and lifted, and a proper number of fire extinguishing bombs can be dropped according to the fire hazard condition, after fire extinguishing is completed, the self-locking mechanism can be controlled to be powered off, and after the self-locking mechanism is powered off, the fire extinguishing bombs can be released. The self-locking mechanism controls the second swing arm to stop swinging and further controls the first swing arm to stop swinging so as to stop releasing of the fire extinguishing bombs, in this way, releasing of the remaining fire extinguishing bombs can be controlled and stopped when fire extinguishing operation is completed, if the remaining fire extinguishing bombs exist in the trajectory, and therefore controllable releasing of the fire extinguishing bombs is achieved; and the waste of the fire extinguishing bombs is avoided.

Description

Technical Field

[0001] The utility model of the application relates to the technical field of fire fighting machines, and in particular to a bomb throwing device for a fire fighting machine. Background Art

[0002] In the case of forest fires or high-rise fires, traditional firefighting equipment is difficult to effectively and timely approach the fire source to extinguish the fire. Especially in forest fires, in order to approach the fire source or open a temporary passage from the fire, fire extinguishing bombs are often used to open the way to extinguish the fire, but there are certain dangers if the fire extinguishing bombs are used improperly.

[0003] In order to safely and effectively throw fire extinguishing bombs at a specific location and accurately in forest fires or high-rise fires, fire-fighting aircraft are often used in the prior art to throw fire extinguishing bombs, that is, a bomb throwing device is installed on the fire-fighting aircraft, and the fire-fighting aircraft is controlled by a ground station to fly to the fire-fighting destination in the fire scene to throw bombs to extinguish the fire.

[0004] The existing bomb throwing mechanism generally includes two sandwich panels arranged in parallel; each sandwich panel is provided with a slide rail; the two ends of the connecting rod are respectively connected to the two slide rails in a sliding manner; the steering gear drives the mounting seat to move up and down in the slide rail to achieve the blocking and release of the fire extinguishing bomb. The bomb throwing mechanism of this structure has high requirements on the parallelism of the two sandwich panels. When there is an error in the parallelism of the two sandwich panels, the sliding of the connecting rod will interfere, which will cause the steering gear to be blocked and overheated. In addition, the existing bomb throwing mechanism adopts the method of throwing all the fire extinguishing bombs at one time, which makes it impossible to throw an appropriate amount of bombs according to the fire intensity, resulting in a waste of fire extinguishing bombs. At the same time, too many fire extinguishing bombs will also cause certain damage to the surrounding environment without fire.

[0005] A fire-fighting machine bomb-throwing mechanism is disclosed, comprising a trajectory and a driving mechanism; the trajectory is used to hold fire-extinguishing bombs, and comprises a bottom plate and two sandwich panels arranged opposite to each other; the driving mechanism is used to block or release the fire-extinguishing bombs, and comprises a mounting seat, a steering gear, and a swinging mechanism; the two ends of the mounting seat are respectively fixedly mounted on the two sandwich panels; the steering gear is fixedly mounted on the mounting seat; the swinging mechanism is connected to the steering gear by transmission; the steering gear drives the swinging mechanism to swing, so as to achieve the blocking and releasing of the fire-extinguishing bomb, thereby solving the problem of avoiding the steering gear from being blocked and overheated.

[0006] However, when the above scheme is actually used, the gaps between the components are too large, which can easily lead to loose installation and loose connections during multiple movements, affecting the accuracy of the swing mechanism movement. In addition, when there are remaining fire extinguishing bombs in the ammunition box that have not been used, if the system power supply is disconnected and the servo machine rotates to the initial position, the remaining fire extinguishing bombs will be discharged through the automatic bomb release port, and the fire extinguishing bombs cannot be controlled, resulting in a waste of fire extinguishing bombs. Utility Model Content

[0007] In view of this, the purpose of the embodiment of the utility model of the present application is to provide a bomb - dropping device for a fire - fighting aircraft, which can avoid the uncontrollable discharge of the remaining fire - extinguishing bombs in the bomb - dropping cabin when the system power supply is disconnected and the steering gear rotates back to the initial position, so as to realize the controllable dropping of the fire - extinguishing bombs and avoid the waste of fire - extinguishing bombs.

[0008] The technical solution adopted by the present utility model to solve the above - mentioned technical problems is as follows:

[0009] According to the embodiment of the present utility model, a bomb - dropping device for a fire - fighting aircraft is provided, which includes a ballistic path and a first driving mechanism and a second driving mechanism arranged in the ballistic path. The ballistic path includes a loading port and a bomb - dropping port. The second driving mechanism is arranged near the bomb - dropping port, and the first driving mechanism is arranged far from the bomb - dropping port. The ballistic path is used for holding fire - extinguishing bombs and includes a supporting bottom plate and two sandwich plates arranged oppositely.

[0010] The first and second driving mechanisms are used to block or release the fire - extinguishing bombs, and each of them includes a mounting seat, a steering gear, a swinging mechanism and a self - locking mechanism. Both ends of the mounting seat are respectively and fixedly installed on the oppositely arranged sandwich plates. Both the steering gear and the self - locking mechanism are fixedly installed on the mounting seat. The swinging mechanism is in transmission connection with the steering gear. The steering gear drives the swinging mechanism to swing so as to realize the blocking and releasing of the fire - extinguishing bombs. The self - locking mechanism is fixed on one side of the steering gear.

[0011] The swinging mechanism includes a first swing arm, a second swing arm and a steering arm. One end of the second swing arm is rotatably connected to one end of the first swing arm, and the other end of the second swing arm is coaxially rotatably connected to the steering arm. The steering gear drives the steering arm to move, and then drives the second swing arm and the first swing arm to swing reciprocally. When the first swing arm swings down to a set limit threshold and the self - locking mechanism is powered off, the self - locking mechanism controls the second swing arm to stop swinging to block the release of the fire - extinguishing bomb.

[0012] Wherein, the self - locking mechanism includes an electromagnetic lock. A spring pin is arranged on the electromagnetic lock, an ear piece is arranged on the second swing arm, and a through - hole is arranged on the ear piece. The central line of the hole position of the through - hole coincides with the axis of the spring pin. When the electromagnetic lock is powered off, the spring pin will pop out and be stuck into the through - hole of the ear piece.

[0013] Wherein, the second swing arm is connected to the steering arm through a steering - arm connecting piece. A second bearing hole position is arranged on the second swing arm. The steering - arm connecting piece includes a smooth - shaft end and a threaded end. The smooth - shaft end penetrates through the bearing hole position of the second swing arm, and the threaded end is fixedly connected to the steering arm.

[0014] Wherein, a second positioning shaft section is arranged at one end of the second swing arm far away from the second bearing hole position, a first bearing hole position is arranged on the first swing arm, the second positioning shaft section penetrates through the first bearing hole position and is clamped by a first bearing, and is fixed by a gasket and a screw.

[0015] Wherein, a first positioning section is arranged at the upper end of the first swing arm, a fixing hole is arranged on the mounting seat, the first positioning section penetrates through the fixing hole, and bearings are respectively arranged on both sides of the first positioning section outside the fixing hole, and the first swing arm and the mounting seat are clamped and fixed by the bearings.

[0016] Wherein, a shock pad is installed at one end of the first swing arm far away from the first positioning section.

[0017] Wherein, the support bottom plate and the two sandwich panels arranged oppositely form a "U"-shaped ballistic path, and the fire engine bomb throwing device includes multiple groups of ballistic paths arranged side by side or stacked.

[0018] Wherein, the middle of the support bottom plate is recessed into a basin-like structure, the loading port is arranged at the high points at both ends of the support bottom plate, and the bomb throwing port is arranged at the basin part in the middle of the support bottom plate.

[0019] Wherein, the number of the ballistic paths is one or more, and each ballistic path has two of the driving mechanisms, and one of the driving mechanisms is arranged at one end of the ballistic path close to the bomb throwing port.

[0020] Wherein, a tooth groove is arranged on the steering gear, and the upper end of the steering arm is clamped into the tooth groove.

[0021] Wherein, a plurality of threaded holes with different hole diameters are arranged on the steering arm and the steering arm connecting piece.

[0022] Compared with the situation that the existing fire engine bomb throwing device cannot control the fire extinguishing bombs and causes waste of fire extinguishing bombs, the fire engine bomb throwing device according to the embodiment of the present application can select a suitable bomb throwing mode according to the fire situation, control the closing and lifting of the first driving mechanism and the second driving mechanism, and put a suitable number of fire extinguishing bombs. When it is detected that the fire extinguishing is completed, the self-locking mechanism can be powered off by control. After the self-locking mechanism is powered off, the self-locking mechanism controls the second swing arm to stop swinging and then controls the first swing arm to stop swinging to block the release of the fire extinguishing bombs. In this way, when the fire extinguishing operation is completed in the present application, if there are remaining fire extinguishing bombs in the ballistic path, the release of the remaining fire extinguishing bombs can be controlled to block, so as to prevent the uncontrollable release and discharge of the remaining fire extinguishing bombs in the ballistic path, thereby realizing the controllable release of the fire extinguishing bombs and avoiding the waste of fire extinguishing bombs. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the bomb - throwing device of a fire - fighting aircraft in an embodiment of the present application;

[0025] Figure 2 It is a schematic structural diagram of the open state of the driving mechanism of the bomb - throwing device of a fire - fighting aircraft in an embodiment of the present application;

[0026] Figure 3 It is a schematic structural diagram of the closed state of the driving mechanism of the bomb - throwing device of a fire - fighting aircraft in an embodiment of the present application;

[0027] Figure 4 It is an exploded view of the structure of the driving mechanism of the bomb - throwing device of a fire - fighting aircraft in an embodiment of the present application;

[0028] Figure 5 It is a schematic structural diagram of another embodiment of the bomb - throwing device of a fire - fighting aircraft in an embodiment of the present application;

[0029] Figure 6 It is a cross - sectional view of the bomb - throwing device of a fire - fighting aircraft in an embodiment of the present application. Detailed implementation manners

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the following further elaborates on the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not used to limit the present utility model.

[0031] Please refer to Figures 1 to 6 , which is a bomb - throwing device and a fire - extinguishing method of a fire - fighting aircraft provided by an embodiment of the present utility model. The bomb - throwing device of the fire - fighting aircraft can avoid the situation where the remaining fire - extinguishing bombs in the bomb - throwing cabin are uncontrollably discharged due to the system power supply being disconnected and the steering gear rotating back to the initial position. The present application can achieve controllable delivery of fire - extinguishing bombs and avoid waste of fire - extinguishing bombs. For the sake of convenience of description, only the parts related to this embodiment are shown.

[0032] Embodiment 1

[0033] Please refer to Figures 1 to 6As shown, the embodiment of the present application provides a fire-fighting machine bomb-dropping device, which includes a trajectory 10 and two drive mechanisms 20 arranged in the trajectory 10. In this embodiment, the drive mechanism 20 includes a first drive mechanism 21 and a second drive mechanism 22, which have the same structure. The trajectory 10 includes a loading port 103 and a bomb-dropping port 104, the second drive mechanism 22 is arranged close to the bomb-dropping port, and the first drive mechanism 21 is arranged away from the bomb-dropping port; the trajectory 10 is used to hold a fire-extinguishing bomb 100, and the trajectory 10 is roughly U-shaped, including a supporting bottom plate 101 and two sandwich panels 102 arranged opposite to each other.

[0034] The first and second driving mechanisms are used to block or release the fire extinguishing bomb, and include a mounting seat 201, a steering gear 202, a swinging mechanism and a self-locking mechanism; the two ends of the mounting seat 201 are respectively fixedly mounted on the oppositely arranged sandwich panels 102; the steering gear 202 and the self-locking mechanism are both fixedly mounted on the mounting seat 201; the swinging mechanism is transmission-connected with the steering gear 202; the steering gear 202 drives the swinging mechanism to swing, so as to achieve blocking and releasing of the fire extinguishing bomb, and the self-locking mechanism is fixed on one side of the steering gear 202.

[0035] The swing mechanism includes a first swing arm 203, a second swing arm 204 and a rudder arm 205. One end of the second swing arm 204 is rotatably connected to one end of the first swing arm 203, and the other end of the second swing arm 204 is coaxially rotatably connected to the rudder arm 205. The servo 202 drives the rudder arm 205 to move, thereby driving the second swing arm 204 and the first swing arm 203 to swing back and forth. When the fire extinguishing operation is completed, the first swing arm 203 swings downward to a set limit threshold, controls the self-locking mechanism to cut off power, and the self-locking mechanism controls the second swing arm 204 to stop swinging and then controls the first swing arm 203 to stop swinging to prevent the release of the fire extinguishing bomb.

[0036] In the embodiment of the present application, the swing range of the first swing arm 203 is: the angle formed between the first swing arm 203 and the mounting base 201 during the swing process is in the range of 0-60 degrees. Therefore, in the embodiment of the present application, the first swing arm 203 swings downward to the set limit threshold value, which is set to: the angle between the mounting base 201 and the first swing arm 203 is 60 degrees. At this time, the first swing arm 203 blocks the trajectory, and the fire extinguishing bomb cannot be released outward through the trajectory.

[0037] The support base plate 101 and the two sandwich panels 102 arranged opposite to each other are combined to form a "U"-shaped trajectory 10. The trajectory 10 can be a single one, or multiple groups arranged side by side, or multiple groups arranged in a superimposed manner.

[0038] The ballistic path 10 includes the loading port 103 and the bomb dropping port 104. The middle of the support base plate 101 is recessed into a basin-like structure. The loading port 103 is arranged at the high points at both ends of the support base plate 101, and the bomb dropping port 104 is arranged at the basin part in the middle of the support base plate 101.

[0039] The mounting seat 201 is in a strip shape, and its two ends are fixed to the sandwich panel 102 by screws. A fixing hole 2011 and a servo mounting hole 2012 are opened at one end of the mounting seat 201.

[0040] The first swing arm 203 includes a first bearing hole position 2031 arranged in the middle and a first positioning section 2032 arranged at the upper end. A shock pad 40 is installed at one end of the first swing arm 203 away from the first positioning section 2032. A plurality of through holes 2033 are opened on the first swing arm 203. By opening the through holes 2033, the weight of the first swing arm 203 can be reduced. The first positioning section 2032 passes through the fixing hole 2011 of the mounting seat 201, and bearings 200 are respectively arranged on both sides of the first positioning section 2032 outside the fixing hole 2011 of the mounting seat 201. The first swing arm 203 and the mounting seat 201 are clamped and fixed through the bearings 200, and are fixed by gaskets 300 and screws. In this embodiment, the model of the bearing 200 is 6804 bearing. In the embodiment of the present application, the shock pad 40 is fastened to the first swing arm 203 by an internal hexagonal ultra-thin short head bolt. At the same time, the shock pad 40 is exactly located at the rolling axis position of the fire extinguishing bomb in the "U"-shaped ballistic path. The shock pad 40 is made of rubber material and can be used to buffer the impact of the fire extinguishing bomb on the first swing arm 203.

[0041] The second swing arm 204 includes a second bearing hole position 2041 arranged at one end and an ear piece 2040 protruding to one side near the second bearing hole position 2041; a second positioning shaft section 2043 is arranged at one end of the second swing arm 204 away from the second bearing hole position 2041. A first bearing hole position 2031 is arranged on the first swing arm 203. The second positioning shaft section 2043 passes through the first bearing hole position 2031 and is clamped by a first bearing 50, and is fixed by a gasket and a screw (not labeled in the figure) to form a rotational pair connection. In this embodiment, the model of the first bearing 50 is 676ZZ flange bearing. A hollow structure is arranged on the second swing arm 204, so that the weight of the whole component can be reduced.

[0042] A fixing connection hole 2051 and a plurality of threaded holes are provided at the upper end of the rudder arm 205. A tooth groove 2021 protrudes from the steering gear 202. The tooth groove 2021 is engaged into the fixing connection hole 2051 at the upper end of the rudder arm 205, and both sides of the fixing connection hole 2051 are fixed by screws.

[0043] The second swing arm 204 and the rudder arm 205 are connected by the rudder arm connecting member 206. The rudder arm connecting member 206 includes a smooth shaft end 2061 and a threaded end 2062. The smooth shaft end 2061 passes through the second bearing hole position 2041 of the second swing arm 204, and the threaded end 2062 is connected and fixed in the threaded hole on the rudder arm 205.

[0044] In one embodiment, a plurality of threaded holes with different hole diameters are provided on the rudder arm 205 and the rudder arm connecting member 206. When the rudder arm connecting member 206 is connected to the rudder arm 205 at different threaded holes, the rotation radius of the rudder arm connecting member 206 is different, and the swing angle of the first swing arm 203 can be controlled and adjusted.

[0045] In the embodiment of the present application, the self-locking mechanism includes an electromagnetic lock 30. A spring pin 302 is provided on the electromagnetic lock 30. An ear plate 2040 is provided on the second swing arm 204. A through hole 2042 is provided on the ear plate 2040. The central line of the hole position of the through hole 2042 coincides with the axis of the spring pin 302. When the system is normally powered, the spring pin 302 of the electromagnetic lock 30 is always in a retracted state, the steering gear 202 works normally, drives the rudder arm 205 to rotate and drives the second swing arm 204 to swing, and then drives the first swing arm 203 to swing. When the throwing work of the fire extinguishing bomb is completed, the system controls the electromagnetic lock 30 to power off, and the spring pin 302 will pop out and be engaged into the through hole 2042 of the ear plate 2040 to form a mechanical self-locking. At this time, the second swing arm 204 stops swinging and then controls the first swing arm 203 to stop moving, avoiding the rotation of the steering gear 202, and the fire extinguishing bomb on the ballistic trajectory is controlled to fall downward under the block of the first swing arm 203.

[0046] Both the steering gear 202 and the electromagnetic lock 30 are installed on the mounting base 201. Among them, the steering gear 202 is installed in the steering gear mounting hole 2012 of the mounting base 201, and the electromagnetic lock 30 is fixed on the mounting base 201 by screws.

[0047] The second swing arm 204 is connected to the rudder arm 205 through a rudder arm connecting member 206. A second bearing hole position 2041 is provided on the second swing arm 204. The rudder arm connecting member 206 includes a smooth shaft end 2061 and a threaded end 2062. The smooth shaft end 2061 passes through the bearing hole position 2041 of the second swing arm 204, and the threaded end 2062 is fixedly connected to a threaded hole on the rudder arm 205. By connecting the second swing arm 204 and the rudder arm 205 through the rudder arm connecting member 206 and reinforcing them with screws or the like, the connection between the two is tight and the structure is compact, and the structure will not become loose during multiple movements.

[0048] In one embodiment, the closing and lifting states of the first driving mechanism 21 and the second driving mechanism 22 provided in the fire fighting machine bomb dropping device can achieve different bomb dropping modes, and the bomb dropping modes include a single bomb dropping mode and a multi-bomb dropping mode;

[0049] Among them, the single bomb dropping mode is: when the fire fighting operation is in progress, receive an instruction to control the first driving mechanism 21 to close and the second driving mechanism 22 to lift. At this time, the fire extinguishing bomb located between the first driving mechanism 21 and the second driving mechanism 22 will be dropped;

[0050] The multi-bomb dropping mode is: when the fire fighting operation is in progress, receive an instruction to control both the first driving mechanism 21 and the second driving mechanism 22 to lift, and all the fire extinguishing bombs in the ballistic trajectory will be dropped.

[0051] The second driving mechanism 22 is provided at one end of the ballistic trajectory close to the bomb dropping port 104. The first driving mechanism 21 is provided at a position far from the bomb dropping port 104. In the embodiment of the present application, the number of fire extinguishing bombs to be dropped and the bomb dropping mode can be determined according to the fire scene situation. For example, when the fire is large, the multi-bomb dropping mode can be controlled and selected for rapid fire extinguishing; when the fire is small and controllable, the single bomb dropping mode can be controlled and selected.

[0052] In one embodiment, multiple groups of the ballistic trajectories 10 are arranged side by side, such as Figure 5 shown, the ballistic trajectories 10 can also be arranged in multiple superimposed groups. When the ballistic trajectories 10 are arranged in multiple side-by-side groups, at this time, multiple sandwich panels 102 can be provided. Every two oppositely arranged sandwich panels 102 and the supporting bottom plate 101 form one of the ballistic trajectories 10, and the first driving mechanism 21 and the second driving mechanism 22 are provided in each ballistic trajectory. When the ballistic trajectories 10 are arranged in multiple superimposed groups, at this time, the supporting bottom plate 101 can be provided in multiple layers as required. Multiple sandwich panels 102 are provided on each layer of the supporting bottom plate 101. The supporting bottom plate 101 on each layer and every two oppositely arranged sandwich panels 102 form one of the ballistic trajectories 10, and the first driving mechanism 21 and the second driving mechanism 22 are provided in each ballistic trajectory 10. When the ballistic trajectories 10 are arranged in multiple side-by-side groups, such asFigure 5 As shown, the ballistic trajectory 10 can also be a set of multiple superimposed ones. At this time, multiple sets of mounting seats 201 are assembled in multiple sets of the "U"-shaped ballistic trajectories by connecting the head and tail, and the front and rear first driving mechanisms 21 and second driving mechanisms 22 are installed in each "U"-shaped channel.

[0053] When the fire-fighting aircraft bomb-throwing device described in the embodiment of the present application is carrying out fire-fighting work, loading is carried out from the loading ports 103 of each ballistic trajectory. When the system is not powered, both the first driving mechanism and the second driving mechanism are in the closed state. When the fire-extinguishing bombs are loaded from the loading ports and roll to the second driving mechanism under the action of gravity, they are accumulated one by one. In all the "U"-shaped ballistic trajectories, the centers of the fire-extinguishing bombs are exactly on the shock-absorbing pads 40 at the lower ends of the first swing arms 203 in the closed state of the driving mechanisms. In this way, the vibration and impact force generated during the rolling of the fire-extinguishing bombs in the ballistic trajectory 10 can be reduced. When the fire-fighting aircraft bomb-throwing device is ready for bomb-throwing work, the steering gear 202 drives the steering arm 205 to rotate. While the steering arm 205 rotates, the second swing arm 204 and the first swing arm 203 are driven to swing reciprocally by means of the steering arm connecting rod 206. When the first swing arm 203 swings downward to the set limit threshold, the electromagnetic lock 30 is controlled to be powered off. At this time, the spring pin 302 on the electromagnetic lock 30 will pop out and be stuck in the through hole 2042 of the lug 2040 of the second swing arm 204 to form a self-locking mechanism, thereby controlling the second swing arm 204 to stop swinging, and the second swing arm 204 fixes the first swing arm 203 to stop swinging. At this time, the second swing arm 204 and the first swing arm 203 can achieve the purpose of blocking the release of the fire-extinguishing bombs.

[0054] In the case where the system of the present application is not powered, the second driving mechanism 22 is in the closed state, and the first driving mechanism 21 located far from the bomb-throwing port 104 can be in the open state in the initial state.

[0055] The fire-fighting aircraft bomb-throwing device described in the embodiment of the present application can input the number of fire-extinguishing bombs to be dropped according to the fire situation, control the closing and lifting of the first driving mechanism and the second driving mechanism. Under the action of gravity, the fire-extinguishing bombs are thrown out from the bomb-throwing port. At this time, when the fire-fighting is completed, the first swing arm 203 of the second driving mechanism can be controlled to stop swinging, and then the remaining fire-extinguishing bombs in the "U"-shaped ballistic trajectory are stuck, realizing the control of the number of fire-extinguishing bombs.

[0056] When the second driving mechanism 22 near the bomb-throwing port is opened in the present application, under the action of gravity, the fire-extinguishing bombs are thrown out from the bomb-throwing port 104. At this time, since the first driving mechanism is in the closed state, only the fire-extinguishing bombs located between the first driving mechanism and the second driving mechanism will be thrown out, and the remaining fire-extinguishing bombs in the "U"-shaped ballistic trajectory are stuck by the closed first driving mechanism. In this way, the control of the number of fire-extinguishing bombs can also be realized.

[0057] In summary, in the fire-fighting aircraft bomb dropping device described in the present application, the steering gear 202 drives the steering arm 205 to rotate. While the steering arm 205 rotates, the second swing arm 204 and the first swing arm 203 are driven to swing reciprocally by the steering arm connecting rod. When the first swing arm 203 swings downward to the set limit threshold and the self-locking mechanism is controlled to power off, the self-locking mechanism controls the second swing arm to stop swinging, and then fixes the first swing arm to stop swinging to block the release of the fire extinguishing bomb. In this way, the embodiment of the present application can select a suitable bomb dropping mode according to the fire situation, control the closing and lifting of the first driving mechanism and the second driving mechanism, and drop an appropriate number of fire extinguishing bombs. When the fire extinguishing operation is completed, if there are still remaining fire extinguishing bombs in the ballistic trajectory, the release of the remaining fire extinguishing bombs can be controlled to block, so as to prevent the uncontrollable discharge of the remaining fire extinguishing bombs in the ballistic trajectory, thereby realizing the controllability of the fire extinguishing bombs and avoiding the waste of fire extinguishing bombs.

[0058] Compared with the prior art fire-fighting aircraft bomb dropping device that cannot control the fire extinguishing bombs and causes waste of fire extinguishing bombs, the fire-fighting aircraft bomb dropping device described in the embodiment of the present application can select a suitable bomb dropping mode according to the fire situation, control the closing and lifting of the first driving mechanism and the second driving mechanism, and drop an appropriate number of fire extinguishing bombs. When it is detected that the fire extinguishing is completed, the self-locking mechanism can be controlled to power off. After the self-locking mechanism is powered off, the self-locking mechanism controls the second swing arm to stop swinging and then controls the first swing arm to stop swinging to block the release of the fire extinguishing bomb. In this way, when the fire extinguishing operation is completed in the present application, if there are still remaining fire extinguishing bombs in the ballistic trajectory, the release of the remaining fire extinguishing bombs can be controlled to block, so as to prevent the uncontrollable discharge of the remaining fire extinguishing bombs in the ballistic trajectory, thereby realizing the controllable dropping of the fire extinguishing bombs and avoiding the waste of fire extinguishing bombs.

[0059] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the scope of the present invention is not limited thereby. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the present invention shall fall within the scope of the present invention.

Claims

1. A bomb - throwing device for a fire truck, characterized in that, It comprises a trajectory and a first driving mechanism and a second driving mechanism arranged in the trajectory, the trajectory comprises a loading port and a launching port, the second driving mechanism is arranged close to the launching port, and the first driving mechanism is arranged far from the launching port; the trajectory is used to hold fire extinguishing bombs, and comprises a supporting bottom plate and two sandwich plates arranged oppositely; The first and second driving mechanisms are used to block or release the fire extinguishing bomb, and both of them include a mounting seat, a steering gear, a swinging mechanism and a self-locking mechanism; the two ends of the mounting seat are respectively fixedly mounted on the sandwich panels arranged opposite to each other; the steering gear and the self-locking mechanism are both fixedly mounted on the mounting seat; the swinging mechanism is connected to the steering gear by transmission; the steering gear drives the swinging mechanism to swing, so as to block and release the fire extinguishing bomb, and the self-locking mechanism is fixed to one side of the steering gear; The swing mechanism includes a first swing arm, a second swing arm and a rudder arm, one end of the second swing arm is rotatably connected to one end of the first swing arm, and the other end of the second swing arm is coaxially rotatably connected to the rudder arm, the servo drives the rudder arm to move, and then drives the second swing arm and the first swing arm to swing back and forth, the first swing arm swings downward to a set limit threshold, and when the self-locking mechanism is controlled to be powered off, the self-locking mechanism controls the second swing arm to stop swinging to prevent the release of the fire extinguishing bomb.

2. The fire engine bomb dropping device according to claim 1, characterized in that, The self-locking mechanism includes an electromagnetic lock, which is provided with a spring pin. The second swing arm is provided with an ear piece, and the ear piece is provided with a through hole. The center line of the through hole coincides with the axis of the spring pin. When the electromagnetic lock is powered off, the spring pin will pop out and get stuck in the through hole of the ear piece.

3. The fire fighting machine bomb dropping device according to claim 2, characterized in that, The second swing arm is connected to the rudder arm through a rudder arm connecting piece. A second bearing hole is provided on the second swing arm. The rudder arm connecting piece includes an optical axis end and a threaded end. The optical axis end passes through the bearing hole of the second swing arm, and the threaded end is connected and fixed to the rudder arm.

4. The fire engine bomb dropping device according to claim 3, wherein, A second positioning shaft section is arranged on the second swing arm at one end away from the second bearing hole, a first bearing hole is arranged on the first swing arm, the second positioning shaft section passes through the first bearing hole and is clamped by the first bearing and fixed by a gasket and a screw.

5. The fire fighting machine bomb dropping device according to claim 2, characterized in that, A first positioning section is provided at the upper end of the first swing arm, a fixing hole is provided on the mounting seat, the first positioning section passes through the fixing hole, and bearings are respectively provided on both sides of the first positioning section outside the fixing hole, and the first swing arm and the mounting seat are clamped and fixed by the bearings.

6. The fire fighting machine bomb dropping device according to claim 2, wherein A shock-absorbing pad is installed at one end of the first swing arm away from the first positioning section.

7. The bomb-dropping device of the fire truck according to claim 1, characterized in that, The support base plate and the two sandwich panels arranged opposite to each other are combined to form a "U"-shaped trajectory, and the fire-fighting machine bomb-dropping device includes multiple groups of trajectories arranged side by side or multiple groups of trajectories arranged in a superimposed manner.

8. The bomb - dropping device of a fire - fighting machine according to claim 7, characterized in that, The middle part of the support bottom plate is concave to form a basin-like structure, the loading ports are arranged at the high points at both ends of the support bottom plate, and the dropping port is arranged in the basin part in the middle of the support bottom plate.

9. The fire engine bomb dropping device according to any one of claims 1-8, characterized in that, The steering gear is provided with a tooth groove, and the upper end of the rudder arm is clamped into the tooth groove.

10. The fire machine bomb throwing device according to claim 3, characterized in that, The rudder arm and the rudder arm connecting piece are provided with a plurality of threaded holes with different aperture sizes.

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