Fire engine seat with gas cylinder fixing mechanism and fire engine

Abstract

The utility model provides a kind of fire engine seat with gas cylinder fixing mechanism and fire engine belongs to fire engine technical field, including the seat body being installed on fire engine, the backrest of seat body has the accommodating cavity for accommodating gas cylinder, accommodating cavity is provided with gas cylinder fixing mechanism. Gas cylinder fixing mechanism includes mounting seat, cover, claw and drawstring, cover is located in the top of accommodating cavity and is hinged with mounting seat, the side of cover is provided with fixed shaft, claw is hinged with mounting seat and is oppositely arranged with fixed shaft, the bottom of claw has operating lever for unlocking cover, one end of drawstring is connected with operating lever. Gas cylinder is abutted on the side of cover can make gas cylinder is fixed, and cover is locked. When needing to unlock gas cylinder, pull drawstring. Since drawstring can be set to extend to the front or side of seat body any convenient accessible position, or line-of-sight accessible position, relative to prior art need to backhand blind unlocking, it is convenient to operate and unlocking success rate is high.

Description

Technical Field

[0001] This utility model belongs to the field of fire truck technology, and more specifically, it relates to a fire truck seat and a fire truck with a gas cylinder fixing mechanism. Background Technology

[0002] Self-contained breathing apparatus (SCBA) is one of the essential pieces of equipment for firefighters to meet their breathing needs during fire rescue operations. Firefighters need to sit on the seat of the fire truck while wearing the SCBA's air cylinder, and the back of the fire truck seat provides space to accommodate the air cylinder.

[0003] In the prior art, Chinese utility model patent CN210502415U discloses a gas cylinder fixing device and a fire seat equipped with the device. In this solution, the gas cylinder is pressed and fixed or disassembled by rotating the cover. When the cover presses and fixes the gas cylinder, the fixing shaft, the pawl, and the limiting seat lock the cover in place. When it is necessary to disassemble the gas cylinder, the cover can be released from the locked state by pressing the operating lever.

[0004] However, in the aforementioned patented design, the operating lever is located on the side of the enclosure, behind the firefighter, and because the gas cylinder is fixed, the firefighter's ability to turn around is restricted. Therefore, when it is necessary to open the enclosure, the firefighter needs to operate the lever blindly with their hands behind their back, resulting in an unchanging operation. Furthermore, if the firefighter's clothing is thick during cold weather, the ability to pull the lever with their hands behind their back is also limited, affecting the time available to disembark and conduct emergency operations. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a fire truck seat and fire truck with a gas cylinder fixing mechanism. Firefighters can quickly unlock the gas cylinder by pulling the front or side extension of the seat, without having to turn their hands behind their back or turn around to operate, making it quick and convenient.

[0006] To achieve the above objectives, the present invention provides a fire truck seat with a gas cylinder fixing mechanism, comprising a seat body, the backrest of which has a receiving cavity for accommodating a gas cylinder, and a gas cylinder fixing mechanism disposed within the receiving cavity; the gas cylinder fixing mechanism includes a mounting base, a cover, and a locking claw; the mounting base is fixedly installed in the receiving cavity, the cover is located at the top of the receiving cavity, the cover is hinged to the mounting base, and a torsion spring is provided on the hinge axis between the cover and the mounting base; the cover has a top and a side portion combined into an inverted L shape, and a fixing shaft is provided on the side of the side portion; the locking claw is hinged to the mounting base and disposed opposite to the fixing shaft, and the gas cylinder abuts against the side portion, causing the cover to rotate along the mounting base, locking the fixing shaft and the locking claw, and securing the top to the top of the gas cylinder; the bottom of the locking claw has an operating lever for unlocking the cover; the gas cylinder fixing mechanism also includes a pull rope, one end of which is connected to the operating lever, and the other end of which extends to the front or side of the seat body.

[0007] When the gas cylinder needs to be unlocked, simply pull the cord. Since the cord can be set to extend to any easily accessible position in front of or to the side of the seat, or to a position within sight, it is more convenient and has a higher success rate than existing technologies that require blind unlocking with hands behind the back.

[0008] Optionally, the seat body is equipped with a support plate, on which a limiting hole is formed. The end of the pull rope away from the control lever passes through the limiting hole, and the end of the pull rope away from the control lever has a pulling end that is larger than the limiting hole. Pulling the control lever pulls the pull rope, causing the pulling end to engage at the limiting hole, thus positioning the end of the pull rope at the limiting hole for easy pulling by firefighters. Firefighters can unlock the control lever by pulling the pulling end.

[0009] Optionally, the seat body has a cord channel inside, along which the cord extends to the front or side of the seat body. This prevents the cord from being completely exposed on the outside of the seat body and avoids it from getting tangled with external objects.

[0010] Optionally, a torsion spring two is provided on the hinge shaft between the pawl and the mounting base. A slot one opposite to the fixed shaft is provided on the top of the pawl, and a locking tooth is provided on the bottom of the pawl. A locking groove is located on the rear side of the locking tooth. The operating lever is hinged to the mounting base, and a torsion spring three is provided on the hinge shaft between the operating lever and the mounting base. The top of the operating lever has a locking boss that abuts against the front or rear side of the locking tooth. When the gas cylinder is locked by abutting against the side, the fixed shaft is inserted into slot one, causing the pawl to rotate. The pawl then rotates the operating lever. At the instant the locking boss separates from the front sidewall of the locking tooth, torsion spring three causes the operating lever to rotate, causing the locking boss to rotate and engage in the locking groove, locking the pawl and the cover. After pulling the pull rope, the locking boss disengages from the locking groove on the rear side of the locking tooth. The pawl pops out under the action of torsion spring two, and the cover, under the action of torsion spring one, causes the fixed shaft to disengage from slot one, popping out and unlocking the gas cylinder.

[0011] Optionally, the gas cylinder fixing mechanism also includes a fixing plate located on the side of the clamp, the fixing plate being fixedly connected to the mounting base, and the fixing plate having a limiting notch aligned with the first clamping slot. When the gas cylinder is locked, the fixing shaft is clamped within the first clamping slot and the limiting notch and cannot be dislodged, ensuring a locking effect.

[0012] Optionally, the mounting base is also equipped with a guide tube, which is located at the bottom of the control lever and fixedly connected to the mounting base. The pull rope passes through the interior of the guide tube, so that the part of the pull rope between the control lever and the guide tube can always remain vertical, ensuring that the control lever can be pulled downward in the unlocking direction when the pull rope is pulled.

[0013] Optionally, the system also includes a hollow screw, an upper fixing nut, and a lower fixing nut. The hollow screw serves as a directional cylinder. A horizontal connecting platform located at the bottom of the control lever is fixedly mounted on the mounting base. The hollow screw extends vertically through the horizontal connecting platform. Both the upper and lower fixing nuts are screwed onto the outer side of the hollow screw, abutting against the top and bottom walls of the horizontal connecting platform, respectively. The upper and lower fixing nuts secure the hollow screw, acting as a directional cylinder, to the mounting base, facilitating assembly and disassembly.

[0014] Optionally, a gas cylinder holder is also fixedly installed at the bottom of the receiving cavity. The gas cylinder holder is located directly below the top, and the top of the gas cylinder holder has an annular receiving groove with side walls that are inverted cone-shaped, wider at the top and narrower at the bottom. When the firefighter is seated, the bottom of the gas cylinder can be placed precisely within the annular receiving groove. The inverted cone-shaped side walls facilitate the positioning of the gas cylinder. After the cover covers the gas cylinder, the cover and the gas cylinder holder secure the gas cylinder, preventing lateral displacement.

[0015] Optionally, the inner wall of the receiving cavity is provided with several bolt holes at different heights, and the mounting base is provided with mounting holes aligned with the bolt holes at any height. The mounting base and the receiving cavity are fixedly connected by bolts passing through the mounting holes and the bolt holes at any height, so that the height of the cover can be adjusted to suit gas cylinders of different specifications.

[0016] A fire truck includes a fire truck seat with a gas cylinder securing mechanism as described above. When the firefighter is seated, the gas cylinder on their back can directly abut against the side of the cover, locking the gas cylinder with the securing mechanism. The firefighter can unlock the gas cylinder by pulling a pull rope. Since the pull rope can be set to extend to any easily accessible position in front of or to the side of the seat body, or to a position within sight, it is more convenient to operate and has a higher success rate than the existing technology that requires blind unlocking with hands behind the back.

[0017] The advantages of the technical solution of this utility model compared with the prior art are as follows:

[0018] In use, simply place the gas cylinder against the side of the cover to secure it and lock the cover in place. To unlock the gas cylinder, simply pull the cord. Since the cord can be extended to any easily accessible location in front of or to the side of the seat, or within sight, it is much more convenient and has a higher success rate than existing technologies that require blind unlocking with hands behind the back. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of a fire truck seat with a gas cylinder fixing mechanism;

[0021] Figure 2 A schematic diagram of the gas cylinder fixing mechanism;

[0022] Figure 3 A side view of the structure with the gas cylinder securing mechanism in the unlocked state;

[0023] Figure 4 A side view of the gas cylinder fixing mechanism in the locked state;

[0024] Figure 5 A front view of the overall structure of a fire truck seat with a gas cylinder fixing mechanism;

[0025] Figure 6 This is a schematic diagram of the rope and directional cylinder structure.

[0026] Icons: 1. Seat body; 11. Receiving cavity; 111. Bolt hole; 12. Rope passage; 13. Support plate; 14. Limiting perforation; 2. Gas cylinder fixing mechanism; 21. Mounting base; 211. Horizontal connecting platform; 212. Mounting hole; 22. Cover; 221. Top; 222. Side; 223. Fixing shaft; 23. Claw; 231. Claw slot one; 232. Clawing protrusion; 233. Clawing groove; 24. Control lever; 241. Clawing boss; 25. Pull rope; 251. Pulling end; 26. Fixing plate; 261. Limiting notch; 271. Hollow screw; 272. Upper fixing nut; 273. Lower fixing nut; 28. Gas cylinder holder; 281. Annular receiving groove; 31. Three-point seat belt; 32. Airbag. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] Example 1:

[0029] This embodiment provides a fire truck seat with a gas cylinder fixing mechanism, based on Figures 1 to 4As shown, the device includes a seat body 1, and the backrest of the seat body 1 has a receiving cavity 11 for accommodating air cylinders. An air cylinder fixing mechanism 2 is installed inside the receiving cavity 11. When the firefighter is seated, the air cylinder of the air respirator can be fixed by the air cylinder fixing mechanism 2.

[0030] The gas cylinder fixing mechanism 2 includes a mounting base 21, a cover 22, and a locking claw 23. The mounting base 21 is fixedly mounted in the receiving cavity 11. The cover 22 is located at the top 221 of the receiving cavity 11 and is hinged to the mounting base 21. A torsion spring is provided on the hinge axis between the cover 22 and the mounting base 21. The cover 22 has a top 221 and a side portion 222 that are combined into an inverted L shape. A fixing shaft 223 is provided on the side of the side portion 222. The locking claw 23 is hinged to the mounting base 21 and is disposed opposite to the fixing shaft 223. The gas cylinder abuts against the side portion 222, causing the cover 22 to rotate along the mounting base 21, locking the fixing shaft 223 and the locking claw 23, and engaging the top 221 on the top 221 of the gas cylinder. The bottom of the locking claw 23 has an operating lever 24 for unlocking the cover 22.

[0031] When the gas cylinder is not engaged with the gas cylinder fixing structure, the fixing shaft 223 and the claw 23 on the cover 22 are separated, and the top 221 is raised upwards. When the gas cylinder is placed into the gas cylinder fixing mechanism 2, the gas cylinder abuts against the side 222, causing the entire cover 22 to rotate. The fixing shaft 223 and the claw 23 lock together to fix the cover 22. The top 221 of the cover 22 covers the gas cylinder to achieve gas cylinder fixation. When it is necessary to unlock the gas cylinder, pulling the operating lever 24 will unlock the claw 23 and the fixing shaft 223. The cover 22 will pop out under the action of the torsion spring, and the top 221 will rotate upwards, allowing the gas cylinder to be removed from the gas cylinder fixing mechanism 2.

[0032] To facilitate firefighters pulling the control lever 24, the gas cylinder fixing mechanism 2 further includes a pull rope 25 based on the above structure. One end of the pull rope 25 is connected to the control lever 24, and the other end of the pull rope 25 extends to the front or side of the seat body 1. For example, in this embodiment, based on Figure 1 As shown, the pull rope 25 extends to the side of the seat. To unlock the gas cylinder, the firefighter pulls the pull rope 25 to move the control lever 24. Because the pull rope 25 is easily accessible, it is more convenient and has a higher success rate than the existing technology that requires blind unlocking with hands behind the back. Of course, in other embodiments, the pull rope 25 can also be extended to a position in front of the seat that is within sight and easily accessible.

[0033] In this embodiment, based on Figure 1As shown, the seat body 1 is provided with a support plate 13, on which a limiting hole 14 is formed. The end of the pull rope 25 away from the operating lever 24 passes through the limiting hole 14, and the end of the pull rope 25 away from the operating lever 24 is provided with a pulling end 251 that is larger than the limiting hole 14. When the gas cylinder is locked, the pulling end 251 is locked at the limiting hole 14, thereby positioning the end of the pull rope 25, which is convenient for firefighters to locate and pull. When unlocking, the firefighter can pull the pulling end 251 to unlock the operating lever 24. At the same time, based on Figure 5 As shown, a cord channel 12 is provided inside the seat body 1, and the pull cord 25 extends along the cord channel 12 to the front or side of the seat body 1. Depending on the position of the end of the pull cord 25, the cord channel 12 can pass through the inside of the backrest or the seat cushion in the seat body 1. The cord channel 12 restricts the direction of the pull cord 25 and conceals the pull cord 25. In this way, the pull cord 25 will not be completely exposed to the outside of the seat body 1, avoiding entanglement with external objects.

[0034] Furthermore, based on Figure 3 and Figure 4 As shown, a torsion spring is provided on the hinge shaft between the claw 23 and the mounting base 21. A slot 231 opposite to the fixed shaft 223 is provided on the top 221 of the claw 23. A locking tooth 232 is provided on the bottom of the claw 23, and a locking groove 233 is provided on the rear side of the locking tooth 232. The operating lever 24 is hinged to the mounting base 21, and a torsion spring is provided on the hinge shaft between the operating lever 24 and the mounting base 21. The top of the operating lever 24 has a locking boss 241 that abuts against the front or rear side of the locking tooth 232. With the seat facing forward as the front side and the seat back as the rear side, when the gas cylinder is not placed in the gas cylinder fixing mechanism 2, the fixed shaft 223 on the side 222 separates from the slot 231 on the top 221 of the claw 23. Simultaneously, the engaging boss 241 on the control lever 24 abuts against the front side wall of the engaging tooth 232, with the opening of the first slot 231 facing the fixed shaft 223. When the side wall of the gas cylinder abuts against the side portion 222, the side portion 222 rotates rearward, the fixed shaft 223 is placed into the first slot 231 and drives the pawl 23 to rotate clockwise, the elastic potential energy of the second torsion spring increases, and the pawl 23 simultaneously drives the control lever 24 to rotate counterclockwise. At the instant the engaging tooth 232 separates from the engaging boss 241, the control lever 24, driven by the third torsion spring, instantly rotates clockwise and engages into the engaging groove 233 on the rear side of the engaging tooth 232, fixing the position of the pawl 23 and locking the cover 22. When unlocking is required, pull the pull rope 25, which drives the control lever 24 to rotate clockwise, causing the engaging boss 241 to disengage from the engaging groove 233 on the rear side of the engaging tooth 232. At the instant the locking boss 241 separates from the locking tooth 232, the pawl 23 rotates counterclockwise and pops out under the action of the second torsion spring. Under the action of the first torsion spring, the cover 22 drives the fixed shaft 223 to disengage from the first slot 231, the cover 22 pops out, and the gas cylinder is unlocked.

[0035] Meanwhile, the gas cylinder fixing mechanism 2 also includes a fixing plate 26 located on the side of the claw 23. The fixing plate 26 is fixedly connected to the mounting base 21, and the fixing plate 26 has a limiting notch 261 aligned with the first slot 231. When the gas cylinder is locked, the fixing shaft 223 is clamped in the first slot 231 and the limiting notch 261 and cannot be dislodged, ensuring the locking effect.

[0036] Furthermore, based on Figure 3 , Figure 4 and Figure 6 As shown, the mounting base 21 also has a guide tube, which is located at the bottom of the control lever 24 and fixedly connected to the mounting base 21. The pull rope 25 passes through the interior of the guide tube. Since the control lever 24 needs to be pulled downwards to unlock, the guide tube ensures that the portion of the pull rope 25 between the control lever 24 and the guide tube remains vertical, ensuring that the control lever 24 can be pulled downwards in the unlocking direction when the pull rope 25 is pulled. Specifically, in this embodiment, a hollow screw 271, an upper fixing nut 272, and a lower fixing nut 273 are also included. The interior of the hollow screw 271 is hollow along the axial direction. The hollow screw 271 serves as a directional cylinder. A horizontal connecting platform 211 located at the bottom of the control lever 24 is fixedly mounted on the mounting base 21. The hollow screw 271 vertically passes through the horizontal connecting platform 211. An upper fixing nut 272 and a lower fixing nut 273 are screwed onto the outer side of the hollow screw 271, respectively abutting against the top and bottom walls of the horizontal connecting platform 211. The upper fixing nut 272 and the lower fixing nut 273 secure the hollow screw 271, acting as a directional cylinder, to the mounting base 21, facilitating assembly and disassembly.

[0037] Furthermore, based on Figure 1 and Figure 2 As shown, a gas cylinder holder 28 is also fixedly installed at the bottom of the receiving cavity 11. The gas cylinder holder 28 is located directly below the top 221. The top 221 of the gas cylinder holder 28 has an annular receiving groove 281, and the inner wall of the annular receiving groove 281 is an inverted cone shape, wider at the top and narrower at the bottom. When the firefighter is seated, the bottom of the gas cylinder can be placed exactly in the annular receiving groove 281. The inverted cone-shaped sidewall facilitates the positioning of the gas cylinder. After the cover 22 covers the gas cylinder, the cover 22 and the gas cylinder holder 28 fix the gas cylinder and prevent lateral displacement.

[0038] Furthermore, based on Figure 5 As shown, the inner wall of the receiving cavity 11 is provided with a plurality of bolt holes 111 arranged at different heights, and the mounting base 21 is provided with mounting holes 212 aligned with the bolt holes 111 at any height. The mounting base 21 and the receiving cavity 11 are fixedly connected by bolts passing through the mounting holes 212 and the bolt holes 111 at any height, so that the height position of the cover 22 can be adjusted to suit gas cylinders of different specifications.

[0039] Furthermore, based on Figure 1 As shown, the seat body is equipped with a three-point seat belt 31, whose retractor integrates a multi-stage pretensioner and force limiter. Upon impact, the pretensioner instantly tightens the webbing, eliminating any slack between the seat and the protective suit. The ECU intelligently controls the force limiter's level based on the severity of the collision and the occupant's weight, limiting chest load. Subsequently, the force limiter, through a controllable motor rotation, reduces the chest impact load to a safe range. Simultaneously, due to the high center of gravity and speed of fire trucks during turns, this seat integrates an airbag 32 hidden within the side wing of the seat back for more comprehensive protection of firefighters' lives. In a side collision, the airbag rapidly deploys to form a large-area buffer, effectively protecting the sides of the head and torso. By integrating the gas cylinder securing mechanism 2, the three-point seat belt 31, and the airbag 32 within the seat body 1, the system not only meets the gas cylinder placement needs of firefighters but also constitutes a comprehensive collision protection system, ensuring the safety of firefighters.

[0040] Example 2:

[0041] This embodiment provides a fire truck with a fire truck seat featuring a gas cylinder fixing mechanism as shown in Embodiment 1. When the firefighter is seated, the gas cylinder on their back can directly abut against the side 222 of the cover 22, locking the gas cylinder with the gas cylinder fixing mechanism 2. The firefighter can unlock the gas cylinder by pulling the pull rope 25. Since the pull rope 25 can be set to extend to any easily accessible position in front of or to the side of the seat body 1, or to a position within sight, it is more convenient to operate and has a higher success rate than the prior art which requires blind unlocking with hands behind the back.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire truck seat with a gas cylinder fixing mechanism, comprising a seat body, wherein the backrest of the seat body has a receiving cavity for accommodating a gas cylinder, and the receiving cavity is provided with a gas cylinder fixing mechanism. The gas cylinder fixing mechanism includes a mounting base, a cover, and a locking claw. The mounting base is fixedly installed in the receiving cavity. The cover is located at the top of the receiving cavity. The cover is hinged to the mounting base, and a torsion spring is provided on the hinge axis between the cover and the mounting base. The cover has a top and a side portion that are combined into an inverted L shape. A fixing shaft is provided on the side of the side portion. The locking claw is hinged to the mounting base and is arranged opposite to the fixing shaft. The gas cylinder abuts against the side portion, causing the cover to rotate along the mounting base, locking the fixing shaft and the locking claw together, and fastening the top portion to the top of the gas cylinder. The bottom of the locking claw has an operating lever for unlocking the cover. Its features are, The gas cylinder fixing mechanism also includes a pull rope, one end of which is connected to the control lever, and the other end of which extends to the front or side of the seat body.

2. The fire truck seat with a gas cylinder fixing mechanism as described in claim 1, characterized in that: The seat body is provided with a support plate, and a limiting hole is provided on the support plate. The end of the pull rope away from the control lever passes through the limiting hole, and the end of the pull rope away from the control lever is provided with a pulling end with a size larger than the limiting hole.

3. The fire truck seat with a gas cylinder fixing mechanism as described in claim 1 or 2, characterized in that: The seat body has a rope channel inside, and the pull rope extends along the rope channel to the front or side of the seat body.

4. The fire truck seat with a gas cylinder fixing mechanism as described in claim 1, characterized in that: The hinge shaft between the pawl and the mounting base is provided with a torsion spring II. The top of the pawl has a slot I opposite to the fixed shaft. The bottom of the pawl has a locking protrusion, and the rear side of the locking protrusion has a locking groove. The operating lever is hinged to the mounting base, and the hinge shaft between the operating lever and the mounting base is provided with a torsion spring III. The top of the operating lever has a locking protrusion that abuts against the locking protrusion.

5. The fire truck seat with a gas cylinder fixing mechanism as described in claim 4, characterized in that: The gas cylinder fixing mechanism also includes a fixing plate located on the side of the claw, the fixing plate being fixedly connected to the mounting base, and the fixing plate having a limiting notch aligned with the slot.

6. The fire truck seat with a gas cylinder fixing mechanism as described in claim 4, characterized in that: The mounting base is also equipped with a directional cylinder, which is located at the bottom of the control lever and is fixedly connected to the mounting base, and the pull rope passes through the interior of the directional cylinder.

7. The fire truck seat with a gas cylinder fixing mechanism as described in claim 6, characterized in that: It also includes a hollow screw, an upper fixing nut, and a lower fixing nut. The hollow screw serves as the directional cylinder. The mounting base is fixedly installed with a horizontal connecting platform located at the bottom of the control lever. The hollow screw is vertically installed through the horizontal connecting platform. The upper fixing nut and the lower fixing nut are both screwed onto the outside of the hollow screw. The upper fixing nut and the lower fixing nut abut against the top wall and bottom wall of the horizontal connecting platform, respectively.

8. The fire truck seat with a gas cylinder fixing mechanism as described in claim 1, 2, 4, 5, 6, or 7, characterized in that: A gas cylinder holder is also fixedly installed at the bottom of the receiving cavity. The gas cylinder holder is located directly below the top. The top of the gas cylinder holder has an annular receiving groove, and the sidewall of the annular receiving groove is an inverted cone shape that is larger at the top and smaller at the bottom.

9. The fire truck seat with a gas cylinder fixing mechanism as described in claim 1, 2, 4, 5, 6, or 7, characterized in that: The inner wall of the receiving cavity is provided with a plurality of bolt holes at different heights, and the mounting base is provided with mounting holes aligned with the bolt holes at any height. The mounting base and the inner wall of the receiving cavity are fixedly connected by bolts passing through the mounting holes and the bolt holes at any height.

10. A fire truck, characterized in that: A fire truck seat with a gas cylinder fixing mechanism as described in any one of claims 1-9.

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