Fire engine metal tank body assembling and welding processing mechanism and processing method

Abstract

This invention discloses a welding and assembly mechanism and method for fire truck metal tanks, relating to tank welding technology. The mechanism includes coaxially distributed tank clamping mechanisms that move in opposite directions under drive. These mechanisms include multiple locking elements arranged in a circumferential array around a coupling. The outer surface of each locking element is stepped, with only one step contacting the inner wall of the baffle plate. A rubber cover is provided on the stepped surface. The coupling and locking elements are assembled together via a hinge module, which includes connecting rods distributed along the same axis and a top extension module. In its default state, the top extension module causes the locking elements to be inclined, with the lower part of the inclined direction located on the adjacent side of the two tank clamping mechanisms. This invention effectively reduces the defect rate by shortening the relative slippage length caused by circumferential slippage and reducing the uneven deviation of the weld surface fish-scale pattern pitch.

Description

Technical Field

[0001] This invention relates to tank welding technology, specifically a welding mechanism and method for assembling and welding metal tanks for fire trucks. Background Technology

[0002] A fire truck metal tank body, including a tank body and multiple baffles installed inside the tank body, is disclosed in Chinese patent CN201692553U (published on 2011-01-05), which includes a water tank body with a cavity for storing water. The cavity is divided into multiple smaller cavities by transverse and longitudinal baffles arranged in a crisscross pattern. Both the transverse and longitudinal baffles have holes or slots connecting the smaller cavities. These transverse and longitudinal baffles divide the cavity into multiple interconnected small spaces, allowing the impact force of water during vehicle movement to be contained within these smaller spaces, increasing driving stability and safety, and ensuring vehicle speed. Furthermore, the longitudinal baffles effectively prevent the vehicle from overturning during sharp turns, ensuring driver safety.

[0003] The aforementioned box body is not integrally formed, but rather composed of several sections joined together at the port cross-sections and then welded together. The welding process and equipment used are described in Chinese authorized patent, publication number CN110102927B, publication date 2024-07-19, which discloses an automatic tank welding equipment, including a conveyor line, a can clamping device, a positioning device, a can loading device, a mold fitting mechanism, and a welding mechanism. The half-can is positioned at the positioning device, and then, with the cooperation of the can loading device, the half-can is finally placed into the mold head group at a certain angle to complete the fixed-point welding. The positioning is accurate, and the feeding, positioning, and welding processes are fully automated, resulting in high production efficiency and ensuring the welding quality and consistency of the products.

[0004] In the prior art, including the aforementioned patent, the operator places the two tank sections to be welded on two sets of tank clamping devices, respectively. The axial thrust is used to make the ends of the two sections come into close contact. The baffle plate inside the tank is used as the end face positioning reference. The outer clamping rotating frame applies radial clamping force to the outer wall of the tank to transmit torque, thereby driving the two tank sections to rotate synchronously. The circumferential weld is completed in conjunction with the automatic welding gun in a fixed position.

[0005] However, in actual production operations, this driving method revealed a significant technical flaw: slippage and relative displacement during rotation. The root cause of this problem lies in the imbalance between the tank's own weight and the driving friction. When the tank diameter is large and the wall thickness is thick, the tank's own weight can reach several tons, while the tank clamping device drives the tank to rotate solely through the static friction between its arc-shaped pressure head at the end and the outer wall of the tank. As the tank rotates to different phase angles, the torque of its center of gravity relative to the axis of rotation constantly changes, causing the required driving torque to exhibit periodic fluctuations. When the tank rotates to a quadrant where the center of gravity is far from the vertical centerline, the counter-torque generated by gravity increases sharply. Once this counter-torque exceeds the limit static friction torque provided by the arc-shaped pressure head of the external clamping rotating frame, circumferential slippage will occur between the outer wall of the tank and the pressure head. The length generated by this relative motion is extremely small (within the allowable range), but it will still cause uneven pitch of the fish scale pattern on the weld surface, which will affect the appearance quality and fatigue strength of the weld to a certain extent. Therefore, in the subsequent quality inspection stage, if the pitch of the fish scale pattern on the surface exceeds the process requirements, it will be identified as a defective product. Summary of the Invention

[0006] The purpose of this invention is to provide a welding and assembly mechanism and method for fire truck metal tanks, aiming to solve the problem of circumferential slippage between the outer wall of the tank and the pressure head, where the relative motion produces a very small length, resulting in uneven pitch of the fish scale pattern on the weld surface.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fire truck metal tank assembly and welding processing mechanism, comprising a tank clamping mechanism coaxially distributed and driven to move in opposite directions, which includes a plurality of locking elements distributed in a circumferential array about the coupling; The outer surface of the locking member is a stepped surface, and there is one and only one step surface on the stepped surface that contacts the inner wall of the anti-surge plate. A rubber cover is provided on the stepped surface; The coupling and the locking element are assembled together by a hinge module, which includes connecting rods distributed along the same axis and a top extension module. In its default state, the top extension module causes the locking elements to be distributed at an angle, with the lower part of the angle located on the adjacent side of the two clamping mechanisms.

[0008] Preferably, the system also includes a hydraulic jacking module with a loading body containing a three-phase asynchronous motor fixedly mounted at the output end, and the coupling is mounted on the output shaft of the three-phase asynchronous motor.

[0009] Preferably, the stepped surface has at least two steps, and windows are provided on the steps; It also includes an L-shaped sheet metal part that is rotatably disposed within the locking member, the L-shaped sheet metal part including a contacting part and a clamping part; In the default state, the contact part flips out of the window and is perpendicular to it, while the clamping part is embedded in the groove opened on the stepped surface.

[0010] The rubber cover is also provided on the clamping part.

[0011] Preferably, the stepped surface includes a facade adjacent to the step surface, and the edges of the rubber covering on the adjacent facade and step surface are provided with protruding edges. A circular rubber strip is provided inside the edge portion of the protrusions distributed on the facade.

[0012] Preferably, the contacting part is pushed and flipped by the wave deflector so that the clamping part is parallel to the vertical surface to clamp the wave deflector, and the edge of the protrusion contacts the side of the wave deflector to seal the cavity.

[0013] Preferably, the locking member has elastic members symmetrically distributed about the center of the window fixedly installed inside it; The adjacent surfaces of the elastic element are inclined, and the contact part during the flipping process slides and connects with the inclined surface, causing the elastic element to deform and contract to draw in the gas in the sealed cavity and create a negative pressure.

[0014] Preferably, a predetermined distance is maintained between the window and the L-shaped sheet metal part.

[0015] Preferably, the elastic element is an elastic metal honeycomb.

[0016] Preferably, the cross-section of each socket port of the elastic element is rhomboid, and the upper and lower ports are staggered, with the staggered angle being acute.

[0017] 10. A method for assembling and welding a metal tank body for a fire truck, applied to the metal tank assembly and welding mechanism for fire trucks as described in any one of claims 1-9, characterized in that it includes the following steps: S1. Place the two tanks to be welded on the support guide wheels of the base, symmetrically distributed.

[0018] S2. The hydraulic jacking module pushes the loading carrier to move, so that the clamping mechanism enters the tank port; the contact part is pushed by the anti-wave plate and moves, and the clamping part flips.

[0019] S3. Start the top extension module. The locking part changes from inclined to horizontal, and the inner wall of the anti-surge plate contacts the step surface. At this time, the clamping part is parallel to the vertical surface and clamps the anti-surge plate.

[0020] S4. During the execution of step S3, the carrier moves downward, the elastic elements on both sides deform and contract, and the gas in the sealed cavity is drawn in to form a negative pressure, so that the clamping part, the vertical surface and the anti-wave plate are combined into one.

[0021] In the above technical solution, the present invention provides a welding and assembly processing mechanism and method for fire truck metal tanks, which has the following beneficial effects: During the operation, the jacking module is activated, the locking part changes from an inclined state to a horizontal state, and the inner ring wall of the baffle plate contacts the step surface; at this time, the clamping part is parallel to the vertical surface, realizing the clamping of the baffle plate. A rubber cover is provided on the step surface, which can increase the damping force, thereby effectively counteracting the torque effect, shortening the relative slip length caused by circumferential slippage, thereby reducing the unevenness of the fish-scale pattern pitch on the weld surface, and ultimately reducing the defect rate. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the can clamping mechanism provided in an embodiment of the present invention; Figure 3 Provided for embodiments of the present invention Figure 1 Implementation structure diagram; Figure 4 A schematic diagram of the coupling, connecting rod, and top extension module provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the implementation structure of the locking member in cross-section according to an embodiment of the present invention; Figure 6 This is a schematic diagram of an embodiment of the present invention, showing the contacting part being pushed down and in contact with the elastic element. Figure 7 A schematic diagram of the position structure of the elastic member of the clamping part and the vertical surface after clamping, provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the elastic element provided in an embodiment of the present invention; Figure 9 Provided for embodiments of the present invention Figure 8 A schematic diagram of the structure of a single cell.

[0024] Explanation of reference numerals in the attached figures: 1. Coupling; 2. Locking component; 21. Stepped surface; 22. Rubber cover; 23. Protruding edge; 24. Rubber rigid strip; 31. Connecting rod; 32. Top extension module; 4. L-shaped sheet metal part; 41. Abutting part; 42. Clamping part; 5. Elastic component; 100. Hydraulic top extension module; 101. Mounting carrier; 102. Three-phase asynchronous motor; 103. Base; 1031. Guide rail frame; 104. Supporting guide wheel; 105. Moving platform; 106. Upright pole; 107. Swinging rod. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1 Please see Figure 1-9 The present invention provides a technical solution: a fire truck metal tank assembly and welding processing mechanism, including a tank clamping mechanism that is coaxially distributed and driven to move in opposite directions, which includes a plurality of locking elements 2 distributed in a circumferential array about the coupling 1; The outer surface of the locking element 2 is a stepped surface 21, and there is only one step surface on the stepped surface 21 that contacts the inner ring wall of the wave deflector. A rubber cover 22 is provided on the stepped surface 21; The coupling 1 and the locking element 2 are assembled together by a hinge module, which includes connecting rods 31 distributed along the same axis and an extension module 32. In the default state, the top extension module 32 causes the locking member 2 to be distributed at an angle, and the lower part of the angle is located on the adjacent side of the two clamping mechanisms.

[0027] Specifically, the above aims to improve the tank clamping mechanism based on the existing system architecture of the original automatic tank welding equipment, while other components and mechanisms remain unchanged. As described above, the tank clamping mechanism possesses the characteristic of "coaxial distribution and driven movement in opposite directions," meaning the "tank clamping device" clamps the tank to be welded or releases it by moving axially along the drive axis. At this point, new tanks can be lifted using gantry cranes or other lifting equipment, and welded tanks can be hoisted.

[0028] Furthermore, in combination Figure 1 As shown, Figure 1 and Figure 2 As shown, the processing mechanism also includes a base 103, within which guide rail frames 1031 are symmetrically fixed. A movable platform 105 is slidably mounted on the guide rail frames 1031, and a vertical rod 106, used for assembling the can clamping mechanism, is fixedly bolted to the top of the movable platform 105. The hydraulic rods fixedly mounted on the guide rail frames 1031 are as follows... Figure 1The state distribution is shown, and the output end is fixed to the moving platform 105 by bolts. In short, by driving the hydraulic rod to retract, the two moving platforms 105 can be brought closer to each other, thereby enabling the locking member 2 to perform the foundation and clamping operation of the inner ring of the anti-surge plate.

[0029] Secondly, such as Figure 3 As shown, guide wheels 104, distributed along the diagonal of a rectangle, are fixedly mounted on the guide rail frame 1031. These guide wheels 104 are mounted on the swing arm 107 via bearings. Driven by a worm gear motor or a stepper motor, the swing arm 107 swings upwards, allowing the tank to be welded to form a rolling connection with the guide wheels 104. Furthermore, the swing arm 107 also supports the tank to be welded, ensuring its axis is coaxial with the tank clamping mechanism, facilitating the subsequent clamping operation of the baffle plate. It should be noted that the aforementioned coaxial detection needs to be achieved using a sensor, such as an infrared sensor, a laser sensor, or an industrial camera.

[0030] Furthermore, the aforementioned guide wheel 104 is driven to rotate circumferentially by a motor, which in turn drives the tank to be welded to rotate circumferentially in order to cooperate with the welding mechanism to perform the welding operation.

[0031] Among them, such as Figure 2 and Figure 4 The locking element 2 in the above embodiments can be made of hard metals such as cast iron or stainless steel castings. Figure 1 As shown, one end of the connecting rod 31 is rotatably engaged via the adapter lug on the shaft locking member 2, while the other end is welded to the side wall of the coupling 1. The jacking module 32 is assembled in the same manner. It should be noted that the aforementioned jacking module 32 can be any lifting device known to those skilled in the art, such as a hydraulic rod, a pneumatic rod, or a screw jacking mechanism, and will not be listed in detail here.

[0032] The rubber cover 22 in the above embodiments can be made of any known material such as nitrile rubber, EPDM rubber, or polyurethane. Its thickness is not less than 12mm and not more than 25mm. The surface can be smooth or the edges can be textured, and the inner side can be smooth. These are all configuration methods known to those skilled in the art and will not be elaborated on here.

[0033] Furthermore, in the above embodiments, the number of locking elements 2 is not less than three and not more than five. For example... Figure 3 As shown, the overall shape is an isosceles trapezoid from the side view, and the upper base of the isosceles trapezoid is the location of the top extension module 32. When the locking member 2 moves to the predetermined position of the inner ring of the wave deflector, the top extension module 32 is driven to start pushing, thereby causing the locking member 2 to rise and support the inner ring of the wave deflector.

[0034] In the aforementioned technology, during operation, the extension module 32 is activated, and the locking member 2 changes from an inclined state to a horizontal state, with the inner wall of the wave deflector contacting the stepped surface. At this time, the clamping part 42 is parallel to the vertical surface, achieving clamping of the wave deflector. A rubber cover 22 is provided on the stepped surface 21, which increases damping force, effectively counteracting torque and shortening the relative slip length caused by circumferential slippage. This reduces the unevenness of the weld surface's fish-scale pattern pitch, ultimately lowering the defect rate.

[0035] As a further embodiment of the present invention, it also includes a hydraulic jacking module 100 with a mounting carrier 101 containing a three-phase asynchronous motor 102 fixedly installed at the output end, and a coupling 1 is mounted on the output shaft of the three-phase asynchronous motor 102.

[0036] Specifically, such as Figure 1 and Figure 2 As shown, the aforementioned hydraulic jacking module 100 is bolted to the top of the upright 106, and a sliding platform is welded onto the upright 106, which is slidably assembled with the mounting carrier 101. The aforementioned hydraulic rod drives the tank clamping mechanism to approach the tank to be welded, and then the hydraulic jacking module 100 extends into the interior of the tank to be welded. After the locking member 2 changes form and abuts against the inner wall of the baffle plate, it locks. Then, the three-phase asynchronous motor 102 and the guide wheel 104 rotate synchronously, thereby driving the tank to perform the welding operation.

[0037] As another embodiment further provided by the present invention, combined with Figure 4 and Figure 5 As shown, the stepped surface 21 has at least two stepped surfaces, and windows are provided on the stepped surfaces; It also includes an L-shaped sheet metal part 4 that is rotatably disposed within the locking part 2, the L-shaped sheet metal part 4 including an abutting part 41 and a clamping part 42; In the default state, the contact part 41 flips out of the window and is perpendicular to it, while the clamping part 42 is embedded in the groove opened on the stepped surface 21.

[0038] A rubber cover 22 is also provided on the clamping part 42.

[0039] Specifically, the aforementioned rubber cover 22 is divided into two parts. The first part is arranged on the stepped surface 21, while the second part is distributed on the surfaces of the contact part 41 and the clamping part 42.

[0040] Furthermore, in the embodiment, the rotating shaft of the L-shaped sheet metal part 4 is installed at the junction of the contact part 41 and the clamping part 42, and it is installed with a rubber gasket ring to achieve the effect of rotational damping.

[0041] In the specific implementation process, when the hydraulic jacking module 100 pushes the carrier 101 to move, allowing the tank clamping mechanism to enter the tank port, the contact part 41 first contacts the side of the baffle plate. As the hydraulic jacking module 100 continues to advance, the contact part 41 is gradually rotated by the reaction force of the baffle plate to avoid it; at the same time, the clamping part 42 gradually rotates out from the initially stored groove. When the edge of the baffle plate abuts against the vertical surface of the next step (i.e., the vertical positioning surface of the step), the jacking module 32 is activated, driving the locking member 2 from an inclined state to a horizontal state. The horizontal section of the locking member 2 presses against the inner ring wall of the baffle plate (or the step surface at the bottom of the baffle plate), locking the baffle plate in the horizontal direction. At this time, the clamping part 42 is fully extended and parallel to the vertical surface of the step, and the two together form a clamping pair (such as...). Figure 5 As shown): The clamping part 42 presses against the side of the wave deflector from one side, and the vertical surface provides support from the other side, thereby firmly clamping and fixing the wave deflector.

[0042] Based on the above embodiments, in another embodiment of the present invention, the stepped surface 21 includes a vertical surface adjacent to the step surface, and the edge of the rubber cover 22 located on the adjacent vertical surface and the step surface is provided with a protruding edge 23. A circular rubber strip 24 is provided within the edge 23 of the protrusions distributed on the facade.

[0043] Furthermore, the contact part 41 is pushed and flipped by the wave deflector, so that the clamping part 42 is parallel to the vertical surface to clamp the wave deflector, and the edge 23 of the protrusion contacts the side of the wave deflector to seal the cavity.

[0044] Specifically, such as Figure 4 As shown, the rubber rigid strip 24 is wrapped inside the edge 23 of the protrusion. When it is in the state where the clamping part 42 is parallel to the vertical surface and clamps the baffle plate, it provides a function similar to the edge of a suction cup. It is mainly used to contact the baffle plate, so that a certain gap is formed between the rubber cover 22 and the baffle plate. This gap is the sealing cavity mentioned above (e.g., Figure 5 (As shown).

[0045] Based on the above embodiments, in another embodiment of the present invention, the locking member 2 is fixedly installed with elastic members 5 symmetrically distributed about the center of the window; The adjacent surfaces of the elastic element 5 are inclined surfaces. The contact part 41 during the flipping process slides and connects with the inclined surface, causing the elastic element 5 to deform and contract to draw in the gas in the sealed cavity and create a negative pressure (such as...). Figure 6 and Figure 7 ).

[0046] Specifically, the elastic element 5 can be a known elastic metal element in the art, such as an equidistant compression spring or a shape memory metal sheet. Each window forms an independent space, and each independent space is connected to the sealed cavity via a one-way exhaust valve (gas can only be discharged from the independent space to the sealed cavity and cannot flow back). Figure 5 As shown, when the hydraulic jacking module 100 continuously pushes the contact part 41, the contact part 41 first contacts the side of the baffle plate, and then flips over during the continued advancement to avoid the baffle plate. During the flipping and avoidance process, the contact part 41 simultaneously compresses the elastic members 5 located on both sides, causing the elastic members 5 to shrink in volume, and the gas inside and in the independent space is discharged into the sealed cavity through the one-way valve (the sealed cavity is also equipped with an external pressure relief valve or a space that can accommodate gas). When the hydraulic jacking module 100 stops advancing, the elastic member 5 begins to rebound and expand, increasing in volume. At this time, the one-way valve closes (achieved through the cooperation of a sensor, such as a touch switch or limit switch that detects the movement path of the L-shaped sheet metal part 4, which is existing technology and will not be elaborated further), and cannot draw air from the sealed cavity, resulting in a decrease in pressure inside the independent space and the sealed cavity connected to it, forming a negative pressure. This negative pressure firmly clamps and fixes the baffle plate to the clamping part 42 and the vertical surface, and the three form a whole.

[0047] Based on the above embodiments, in another embodiment of the present invention, a predetermined distance is maintained between the window and the L-shaped sheet metal part 4.

[0048] Specifically, the aforementioned predetermined spacing is arranged in relation to the circumferential rotation direction of coupling 1, and the predetermined spacing is maintained by rubber gaskets, i.e., "using rubber gaskets for installation to achieve the effect of rotational damping" as described in the above embodiment. The purpose is that, by means of adsorption, i.e., "negative pressure firmly clamps and fixes the anti-surge plate to the clamping part 42 and the vertical surface, forming a whole," a first mechanism for preventing displacement is provided. Then, the L-shaped sheet metal part 4, which maintains a predetermined gap on both sides, will transmit the shear force it receives to the elastic parts 5 on both sides when coupling 1 rotates circumferentially, thereby increasing resistance on both sides and achieving a second anti-displacement mechanism. The combination of these two mechanisms disperses tangential force and reduces local wear, thereby optimizing torsional stability and clamping durability. Based on the above embodiments, in another embodiment of the present invention, the elastic element 5 is an elastic metal honeycomb.

[0049] Specifically, such as Figure 8As shown, the elastic metal honeycomb can be made of elastic stainless steel, elastic steel, or other known elastic metal components. The purpose of using this elastic metal honeycomb is to allow the contact portion 41 to synchronously compress the elastic components 5 located on both sides, causing the volume of the elastic components 5 to shrink, and the gas inside and in the independent space to be discharged into the sealed cavity through a one-way valve (the sealed cavity is also equipped with an external pressure relief valve or a space to accommodate gas). When the hydraulic jacking module 100 stops advancing, the elastic components 5 begin to rebound and expand, increasing in volume. During this process, the elastic metal honeycomb can provide a larger gas-accommodating space, thereby generating a stronger negative pressure adsorption force.

[0050] Based on the above embodiments, in another embodiment of the present invention, the cross-section of each socket port of the elastic element 5 is rhomboid, and the upper and lower ports are staggered (e.g., Figure 9 As shown in the figure, the misalignment angle is an acute angle.

[0051] The aforementioned elastic element 5 implements a secondary displacement prevention mechanism. The purpose of this design is to increase the torque force, thereby making the elastic element 5 provide greater resistance. This allows it to provide greater resistance when subjected to circumferential shear force, thus further improving its anti-slip capability.

[0052] Example 2 Based on the above embodiment one, this embodiment aims to provide a method for assembling and welding the metal tank of a fire truck, including the following steps: S1. Place the two tanks to be welded on the guide rollers 104 of the base 103, symmetrically distributed.

[0053] S2, the hydraulic jacking module 100 pushes the carrier 101 to move, so that the clamping mechanism enters the tank port; the contact part 41 is pushed by the anti-wave plate and moves, and the clamping part 42 flips.

[0054] S3. Start the top extension module 32, the locking part 2 changes from inclined to horizontal, and the inner ring wall of the anti-wave plate contacts the step surface; at this time, the clamping part 42 is parallel to the vertical surface and clamps the anti-wave plate.

[0055] S4. During the execution of step S3, the carrier 101 moves down, the elastic elements 5 on both sides deform and contract, and the gas in the sealed cavity is drawn to form a negative pressure, so that the clamping part 42, the vertical surface and the anti-wave plate are combined into one.

[0056] Specifically, firstly, the hydraulic rod drives two moving platforms 105 to move towards each other along the guide rail frame 1031, bringing the clamping mechanisms on both sides closer to the tank port to be welded. Then, the hydraulic jacking module 100 pushes the mounting carrier 101 and the three-phase asynchronous motor 102, causing the locking member 2 on the coupling 1 to extend into the tank until the stepped surface 21 on the locking member 2 approaches the inner ring of the baffle plate. During the extension process, the contact part 41 of the L-shaped sheet metal part 4 first contacts the side of the baffle plate. As the hydraulic jacking module 100 continues to advance, the contact part 41 is gradually rotated by the reaction force of the baffle plate, thus avoiding the baffle plate; simultaneously, the clamping part 42 gradually rotates out from the groove on the stepped surface 21. When the edge of the wave deflector abuts against the vertical positioning surface (i.e., the facade) adjacent to the upper step surface of the locking member 2, the extension module 32 is activated, pushing the locking member 2 from an inclined state to a horizontal state. At this time, the horizontal section of the locking member 2 presses against the inner ring wall or the bottom step surface of the wave deflector, achieving initial radial locking of the wave deflector. At this time, the clamping part 42 of the L-shaped sheet metal part 4 is fully extended and parallel to the facade. The two press against the side of the wave deflector from both sides, forming a clamping pair. During the process of the contact part 41 flipping and avoiding, the contact part 41 simultaneously compresses the elastic members 5 located on both sides of the window, causing the elastic members 5 to shrink in volume and discharge the gas inside and in the independent space into the sealed cavity through the one-way exhaust valve. When the hydraulic extension module 100 stops advancing, the elastic members 5 begin to rebound and expand. At this time, the one-way valve closes, and the pressure inside the independent space and the connected sealed cavity drops, forming a negative pressure. This negative pressure makes the clamping part 42 and the facade more firmly adhere and clamp the wave deflector, and the three form a whole. Meanwhile, the raised edge 23 on the rubber cover 22 and the internal rubber rigid strip 24 are in close contact with the side of the baffle plate, further enhancing the sealing effect and damping. Then, the three-phase asynchronous motor 102 and the drive motor relying on the guide wheel 104 are started. The guide wheel 104, through the swing rod 107, pre-lifts the tank body so that its axis is aligned with the tank clamping mechanism, and drives the tank body to rotate circumferentially, cooperating with the welding mechanism for welding operations. During circumferential rotation, the rubber cover 22 on the stepped surface 21 provides damping force to counteract torque and reduce circumferential slippage; simultaneously, the predetermined distance between the L-shaped sheet metal part 4 and the window transmits tangential force to the elastic parts 5 on both sides, generating additional resistance and achieving secondary anti-displacement. After welding is completed, the top extension module 32 retracts, causing the locking part 2 to return to its tilt, the elastic part 5 releases negative pressure, the hydraulic top extension module 100 and the hydraulic rod retract sequentially, the tank clamping mechanism disengages from the tank body, and the welded tank body can be lifted and loaded into the next tank to be welded, repeating the above steps.

[0057] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mechanism for assembling and welding a metal tank for a fire truck, characterized in that, The device includes a clamping mechanism that is coaxially distributed and driven to move in opposite directions, and includes multiple locking elements distributed in a circumferential array about the coupling. The outer surface of the locking member is a stepped surface, and there is one and only one step surface on the stepped surface that contacts the inner wall of the anti-surge plate. A rubber cover is provided on the stepped surface; The coupling and the locking element are assembled together by a hinge module, which includes connecting rods distributed along the same axis and a top extension module. In its default state, the top extension module causes the locking elements to be distributed at an angle, with the lower part of the angle located on the adjacent side of the two clamping mechanisms.

2. The fire truck metal tank assembly and welding processing mechanism according to claim 1, characterized in that, It also includes a hydraulic jacking module with a loading body containing a three-phase asynchronous motor fixedly installed at the output end, and the coupling is mounted on the output shaft of the three-phase asynchronous motor.

3. The fire truck metal tank assembly and welding processing mechanism according to claim 1, characterized in that, The stepped surface has at least two steps, and windows are provided on the steps; It also includes an L-shaped sheet metal part that is rotatably disposed within the locking member, the L-shaped sheet metal part including a contacting part and a clamping part; In the default state, the contact part flips out of the window and is perpendicular to it, while the clamping part is embedded in the groove opened on the stepped surface; The rubber cover is also provided on the clamping part.

4. The fire truck metal tank assembly and welding processing mechanism according to claim 3, characterized in that, The stepped surface includes a facade adjacent to the step surface, and the edges of the rubber coverings on the adjacent facades and step surfaces are provided with protruding edges. A circular rubber strip is provided inside the edge portion of the protrusions distributed on the facade.

5. The fire truck metal tank assembly and welding processing mechanism according to claim 4, characterized in that, The contact part is pushed and flipped by the wave deflector, so that the clamping part is parallel to the vertical surface to clamp the wave deflector, and the edge of the protrusion contacts the side of the wave deflector to seal the cavity.

6. The fire truck metal tank assembly and welding processing mechanism according to claim 5, characterized in that, The locking component is internally fixed with elastic elements symmetrically distributed about the center of the window; The adjacent surfaces of the elastic element are inclined, and the contact part during the flipping process slides and connects with the inclined surface, causing the elastic element to deform and contract to draw in the gas in the sealed cavity and create a negative pressure.

7. The fire truck metal tank assembly and welding processing mechanism according to claim 6, characterized in that, The window maintains a predetermined distance from the L-shaped sheet metal part.

8. The fire truck metal tank assembly and welding processing mechanism according to claim 7, characterized in that, The elastic element is an elastic metal honeycomb.

9. A fire truck metal tank assembly and welding processing mechanism according to claim 8, characterized in that, The cross-section of each socket port of the elastic element is rhomboid, and the upper and lower ports are staggered, with the included angle of the stagger being an acute angle.

10. A method for assembling and welding a metal tank body for a fire truck, applied to the metal tank assembly and welding mechanism for fire trucks as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the two tanks to be welded on the support guide wheels of the base, symmetrically distributed; S2. The hydraulic jacking module pushes the loading carrier to move, so that the clamping mechanism enters the tank port; the contact part moves under the push of the anti-surge plate, and the clamping part flips; S3. Start the top extension module. The locking part changes from an inclined state to a horizontal state, and the inner ring wall of the anti-surge plate contacts the step surface. At this time, the clamping part is parallel to the vertical surface and clamps the anti-surge plate. S4. During the execution of step S3, the carrier moves downward, the elastic elements on both sides deform and contract, and the gas in the sealed cavity is drawn in to form a negative pressure, so that the clamping part, the vertical surface and the anti-wave plate are combined into one.

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