A muffler flange flatness detection mechanism

Abstract

The utility model relates to mechanical detection technical field, concretely relates to a muffler flange flatness detection mechanism, including the cabinet, the top fixedly connected with the protective shell of cabinet, the top fixedly connected with the fixed plate of cabinet, the inner wall fixedly connected with fixed mechanism of fixed plate, the outside rotationally connected with elevating system of fixed mechanism. In the utility model, through flange down extrusion fixed strip and limit block, fixed strip drives the movement of connecting bin on fixed disc, and connecting bin drives the displacement of moving half ring plate when moving, and moving half ring plate drives the movement of moving block in the top inner wall of fixed disc through connecting bin, and moving block is fixedly connected with damping column no.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to a silencer flange flatness detection mechanism. Background Technology

[0002] The muffler flange is a key component in the overall structure of the muffler used for connection and assembly. It is usually in the form of a round or square metal disc and is fixed to the air inlet or outlet of the muffler or the end of the housing. Its core function is to provide a reliable interface for the precise docking of the muffler with piping systems such as exhaust pipes, ventilation pipes or other equipment.

[0003] The working principle of the muffler flange flatness testing mechanism is as follows: First, the muffler flange is precisely fixed on the testing reference surface by the positioning and clamping assembly. This ensures that the flange plane to be tested is parallel to the measuring coordinate system of the mechanism or is in a preset testing posture, eliminating the influence of workpiece placement deviation on the test results. Then, the measuring unit on the mechanism will collect data from multiple points on the flange plane according to the preset testing path. In contact testing, the probe will contact the flange surface point by point and report the displacement of each point relative to the reference surface. The maximum deviation value of the flange plane relative to the ideal plane is calculated and finally compared with the preset flatness acceptance standard to output the judgment result. Some mechanisms will also generate a test data report at the same time, which will intuitively present the deviation distribution of the flange plane.

[0004] However, some existing muffler flange flatness testing mechanisms have the problem of being unable to fix flanges of different sizes during use. When testing a circular flange with a diameter smaller than the inner diameter of the positioning groove, the flange is prone to radial displacement on the reference platform. When testing a flange with a diameter larger than the positioning groove, the flange edge cannot be effectively supported and the whole flange is suspended, which directly undermines the reference stability during testing and makes it impossible to form an effective clamping force. During the testing process, the workpiece is easily displaced by the contact force of the measuring unit or the vibration of the equipment. The clamping components cannot fit tightly with the flange surface, and stable fixation cannot be achieved. Ultimately, this not only leads to large deviations in the test data, but also poses a risk of collision damage to the testing unit due to workpiece loosening. This seriously restricts the adaptability of the mechanism to testing multiple specifications and batches of muffler flanges. Therefore, a muffler flange flatness testing mechanism is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a silencer flange flatness testing mechanism, which aims to solve the problem that the testing mechanism cannot fix flanges of different sizes during use.

[0006] To achieve the above objectives, this utility model provides a silencer flange flatness testing mechanism, including a cabinet. A protective shell is fixedly connected to the top of the cabinet, and a fixing plate is fixedly connected to the top of the cabinet. A fixing mechanism is fixedly connected to the inner wall of the fixing plate, and a lifting mechanism is rotatably connected to the outside of the fixing mechanism. The fixing mechanism includes a fixing plate, the outside of which is fixedly connected to the inner wall of the fixing plate. Multiple damping rods are fixedly connected to the inner wall of the top of the fixing plate. Moving blocks are fixedly connected to the distal ends of the multiple damping rods. Connecting compartments are fixedly connected to the tops of the multiple moving blocks. Multiple damping columns are fixedly connected to the adjacent sides of the multiple connecting compartments. Fixing strips are slidably connected to the inner walls of the adjacent sides of the multiple connecting compartments. Limit blocks are fixedly connected to the tops of the adjacent sides of the multiple fixing strips. Multiple damping columns are fixedly connected to the distal sides of the multiple connecting compartments. A clamping assembly is slidably connected to the inner wall of the fixing plate.

[0007] The clamping assembly includes two push rods, which are slidably connected to the inner wall of the fixed disk. A pressing block is fixedly connected to the top of each push rod, and a spring is sleeved on the top of each push rod. Two movable semi-ring plates are slidably connected to the top of the fixed disk. Fixing blocks are fixedly connected to both sides of each movable semi-ring plate. A retraction rod is fixedly connected to one side of each fixed block. Two damping columns are fixedly connected to one side of each movable semi-ring plate. A movable plate is fixedly connected to one side of each damping column. Multiple support rods are fixedly connected to the bottom of the fixed disk.

[0008] The lifting mechanism includes two connecting bars. The two connecting bars are fixedly connected to the inner wall of the bottom end of the push rod. Two connecting blocks are rotatably connected to the outer bottom end of each of the two push rods. A connecting plate is fixedly connected to the bottom end of each of the two connecting blocks. A rotating shaft is fixedly connected to the outer side of each of the two connecting plates. A support block is rotatably connected to both ends of each of the two rotating shafts. A connecting shaft is rotatably connected to the inner wall of each of the two connecting plates on adjacent sides. A connecting block is rotatably connected to the outer side of each of the two connecting shafts. A movable disk is fixedly connected to the top of each of the two connecting blocks. Multiple push columns are fixedly connected to the top of the movable disk. A support column is fixedly connected to the bottom end of the movable disk. Two retractable rods are fixedly connected to the top of each of the two connecting bars.

[0009] The bottom ends of multiple support rods are fixedly connected to the inner wall of the top of the cabinet, and the far sides of multiple damping columns are fixedly connected to the near sides of the two movable semi-ring plates.

[0010] The bottom ends of the two pressing blocks are slidably connected to the outer sides of the two movable semi-ring plates, and the bottom ends of the two springs are fixedly connected to the top of the fixed plate.

[0011] The bottom ends of the multiple movable plates are slidably connected to the top of the fixed plate, and the far sides of the multiple fixed strips are fixedly connected to the near sides of the multiple damping columns.

[0012] The outer surfaces of the plurality of push columns are slidably connected to the inner wall of the fixed plate, and the bottom ends of the support columns are fixedly connected to the top inner wall of the cabinet.

[0013] The top ends of the multiple retractable rods are fixedly connected to the bottom end of the fixed plate, and the bottom ends of the multiple support blocks are fixedly connected to the top inner wall of the cabinet.

[0014] This utility model relates to a silencer flange flatness testing mechanism.

[0015] 1. In this utility model, the flange moves down and squeezes the fixing strip and the limiting block. The fixing strip drives the connecting chamber to move on the fixed plate. When the connecting chamber moves, it drives the moving half-ring plate to move. The moving half-ring plate drives the moving block to move on the inner wall of the top of the fixed plate through the connecting chamber. The moving block is fixedly connected to the damping column. The damping column always provides tension to the fixing strip and the limiting block, so that the fixing strip flange is effectively fixed, realizing the effect of fixing the silencer flange of different sizes, thereby achieving the protective fixing effect of the flange and ensuring the accuracy of subsequent flatness detection.

[0016] 2. In this utility model, the push rod drives the connecting strip to move downward. The connecting strip is assisted by the second retractable rod. At the same time, the push rod drives the first connecting block to rotate. The first connecting block drives the connecting plate to rotate around the axis. The connecting plate drives the second connecting block to move upward through the connecting shaft. The second connecting block drives the moving plate to rise. The moving plate drives the push column to slide upward. The push column pushes the tested muffler flange to move upward, thereby achieving a protective effect during the flange handling process and reducing the risk of flange damage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is a three-dimensional schematic diagram of a silencer flange flatness detection mechanism proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the cabinet structure of a silencer flange flatness detection mechanism proposed in this utility model;

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the fixing plate of the silencer flange flatness detection mechanism proposed in this utility model;

[0022] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0023] In the diagram: 1-Cabinet; 2-Protective Shell; 3-Fixing Plate; 4-Fixing Mechanism; 41-Fixing Disc; 42-Damping Rod; 43-Moving Block; 44-Connecting Compartment; 45-Damping Column 1; 46-Fixing Strip; 47-Limit Block; 48-Damping Column 2; 49-Clamping Assembly; 491-Fixing Block; 492-Retracting Rod 1; 493-Damping Column 3; 494-Moving Plate; 495-Push Rod; 496-Spring; 497-Pressing Block; 498-Support Rod; 401-Moving Semi-Ring Plate; 5-Lifting Mechanism; 51-Connecting Block 1; 52-Connecting Plate; 53-Rotating Shaft; 54-Supporting Block; 55-Connecting Shaft; 56-Connecting Block 2; 57-Moving Disc; 58-Push Column; 59-Connecting Strip; 501-Retracting Rod 2; 502-Supporting Column. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1 to 3 This utility model provides an embodiment of a silencer flange flatness testing mechanism, comprising a cabinet 1, a protective shell 2 fixedly connected to the top of the cabinet 1, and a fixing plate 3 fixedly connected to the top of the cabinet 1, ensuring that the fixing mechanism 4 is firmly installed, operates without shaking, and guarantees the horizontality of the fixing mechanism 4. The fixing mechanism 4 is fixedly connected to the inner wall of the fixing plate 3, ensuring stable operation of the fixing mechanism 4 and no displacement under force, thus ensuring that the fixing accuracy of the flange meets the testing requirements. A lifting mechanism 5 is rotatably connected to the outside of the fixing mechanism 4; this ensures coordinated movement between the fixing mechanism 4 and the lifting mechanism 5, without jamming, reduces component wear, and guarantees the smoothness and accuracy of the lifting action.

[0026] The fixing mechanism 4 includes a fixing disk 41, which is externally fixedly connected to the inner wall of the fixing plate 3, ensuring that the relative position of the fixing disk 41 and the fixing plate 3 remains unchanged, providing a stable installation reference for the fixing mechanism 4. Multiple damping rods 42 are fixedly connected to the inner wall of the top of the fixing disk 41. When the moving block 43 slides, the damping rods 42 generate damping force through extension and contraction, slowing down the movement speed of the moving block 43. Moving blocks 43 are fixedly connected to the distal ends of the multiple damping rods 42, sliding along the grooves of the fixing disk 41 under the drive of the damping rods 42 or external force. Connecting chambers 44 are fixedly connected to the tops of the multiple moving blocks 43, serving as the connecting carrier between the damping column 45 and the fixing bar 46, transmitting the movement of the moving block 43 to the damping column 45, and simultaneously providing sliding guidance for the fixing bar 46.

[0027] Multiple damping columns 45 are fixedly connected to adjacent sides of multiple connecting chambers 44, and fixing strips 46 flexibly contact the flange to avoid rigid collisions that could damage the flange surface. Fixing strips 46 are slidably connected to the inner walls of adjacent sides of multiple connecting chambers 44, ensuring precise displacement and rapid response of the fixing strips 46, and allowing for flexible adjustment of the clamping position according to the flange size. Limit blocks 47 are fixedly connected to the top of adjacent sides of multiple fixing strips 46, directly contacting the outer wall of the muffler flange, and moving towards the flange and applying clamping force under the action of the fixing strips 46. Multiple damping columns 48 are fixedly connected to distant sides of multiple connecting chambers 44, ensuring smooth movement and uniform force distribution of the connecting chambers 44, and preventing violent collisions between the fixing strips 46 and the flange due to excessively rapid movement. A clamping assembly 49 is slidably connected to the inner wall of the fixing plate 41. This ensures smooth operation of the clamping assembly 49, high force transmission efficiency, rapid response to operating commands, and improved ease of flange fixing and releasing.

[0028] Reference Figures 3 to 5 The lifting mechanism 5 includes two connecting bars 59, which are externally fixedly connected to the inner wall of the bottom end of the push rod 495. This ensures that when the push rod 495 moves up and down, it can directly drive the connecting bars 59 to move synchronously. Two connecting blocks 51 are rotatably connected to the bottom ends of both push rods 495, converting the axial linear motion of the push rod 495 into its own rotational motion. These blocks also act as transmission mediators between the push rod 495 and the connecting plate 52, transmitting the motion to the connecting plate 52. The bottom ends of both connecting blocks 51 are fixedly connected to the connecting plate 52. Driven by the connecting blocks 51, they rotate around the rotating shaft 53, simultaneously transmitting force to the connecting shaft 55 through their own rotation, thereby driving the connecting block 56 to move.

[0029] Both connecting plates 52 are fixedly connected to a rotating shaft 53, which serves as the rotation center of the connecting plates 52, providing a stable rotation fulcrum and restricting the connecting plates 52 to rotate only around a fixed axis. Support blocks 54 are rotatably connected to both ends of the two rotating shafts 53, providing support for the shafts 53 through their fixed installation, while allowing the shafts 53 to rotate freely using bearings. Connecting shafts 55 are rotatably connected to the inner walls of adjacent sides of the two connecting plates 52, converting the rotational motion of the connecting plates 52 into the axial linear motion of the second connecting block 56. The second connecting block 56 is rotatably connected to the outside of both connecting shafts 55, ensuring that the second connecting block 56 moves easily, is firmly connected to the moving disk 57, and can stably drive the moving disk 57 to rise and fall, preventing the moving disk 57 from tilting due to loose connections.

[0030] Two connecting blocks 56 are fixedly connected to their top ends with movable disks 57. Driven by the connecting blocks 56, these disks move vertically up and down along the support column 502, simultaneously transmitting their own upward and downward movement to the push column 58 at the top. Multiple push columns 58 are fixedly connected to the top end of the movable disk 57, moving up and down synchronously with it. The top end contacts the bottom of the tested muffler flange, using upward thrust to lift the flange to a height suitable for handling. The bottom end of the movable disk 57 is fixedly connected to the support column 502, providing vertical guidance and restricting its movement to along the axis of the support column 502. Two retractable rods 501 are fixedly connected to the top ends of both connecting bars 59. These rods extend and retract synchronously with the movement of the connecting bars 59, providing cushioning and support through their elasticity.

[0031] Reference Figures 1 to 3 The clamping assembly 49 includes two push rods 495, which are slidably connected to the inner wall of the fixed plate 41. The fixed plate 41 provides axial sliding guidance for the push rods 495 through guide holes, restricting the push rods 495 to move only in the vertical direction and preventing horizontal deviation. Each push rod 495 has a lower pressure block 497 fixedly connected to its top end. Driven by the push rods 495, the lower pressure block 497 moves downwards and contacts both sides of the movable semi-ring plate 401 through its outer inclined surface, converting the axial pressure into a radial force that pushes the movable semi-ring plate 401 to slide. Each push rod 495 has a spring 496 sleeved on its top end. The spring 496 uses its own elastic force to lift the push rods 495, causing the lower pressure block 497 to release its pressure on the movable semi-ring plate 401. When the push rods 495 are pressed, the springs 496 compress and store elastic potential energy; when released, the springs release the potential energy and reset the push rods 495.

[0032] Two movable semi-ring plates 401 are slidably connected to the top of the fixed plate 41. Driven by the pressing block 497, they slide along the top groove of the fixed plate 41, simultaneously driving the second damping column 48 and the third damping column 493 to move synchronously, thus driving the fixed strip 46 and the movable plate 494. Fixed blocks 491 are fixedly connected to both sides of the two movable semi-ring plates 401, serving as connecting carriers for the first retractable rod 492. The two movable semi-ring plates 401 are connected via the first retractable rod 492, ensuring synchronous movement and balanced force distribution. The first retractable rod 492 is fixedly connected to the adjacent side of the two fixed blocks 491. When the movable semi-ring plates 401 slide in the same direction, the first retractable rod 492 is compressed, generating damping force and slowing down the sliding speed.

[0033] Two damping columns 493 are fixedly connected to adjacent sides of the two movable semi-ring plates 401. These columns slide with the movable semi-ring plates 401, transmitting thrust to the movable plate 494 via rubber ends. Simultaneously, the elasticity of the rubber buffers the impact force when the movable plate 494 contacts the flange. Multiple damping columns 493 are fixedly connected to adjacent sides of the movable plate 494, which slides along the top of the fixed plate 41 under the push of the damping columns 493. Multiple support rods 498 are fixedly connected to the bottom of the fixed plate 41, serving as the vertical support structure for the fixed plate 41. These rods bear the weight of the fixed plate 41 and all components above it, ensuring the fixed plate 41 remains horizontal. The bottom ends of the multiple support rods 498 are fixedly connected to the inner top wall of the cabinet 1, ensuring the support rods 498 are securely installed and resistant to vibration interference, further guaranteeing the stability of the fixed plate 41.

[0034] Multiple damping columns 48 are fixedly connected at opposite ends to adjacent ends of two movable semi-ring plates 401. As the movable semi-ring plates 401 slide, the thrust is transmitted to the connecting chamber 44, causing the connecting chamber 44 and subsequent fixing bars 46 and limiting blocks 47 to move, thus transmitting the clamping force. The bottom ends of two pressing blocks 497 are slidably connected to the outer sides of the two movable semi-ring plates 401. When the pressing blocks 497 move downwards, their inclined surfaces slide into contact with the inclined surfaces of the movable semi-ring plates 401, converting the axial force into a radial force that drives the movable semi-ring plates 401 to slide in the same direction. The bottom ends of two springs 496 are fixedly connected to the top of a fixed disk 41. The fixed disk 41 provides a fixed support point for the springs 496, ensuring that the springs 496 always move axially when compressed or extended. The bottom ends of multiple movable plates 494 are slidably connected to the top of the fixed plate 41, so that the sliding trajectory of the movable plates 494 is precise and without deviation, and can cooperate with the limit block 47 to accurately clamp the flange, thereby improving the clamping accuracy.

[0035] Multiple fixing bars 46 are fixedly connected at opposite ends to multiple damping columns 45 at adjacent ends. The damping columns 45 transmit the thrust of the connecting chamber 44 to the fixing bars 46, causing the fixing bars 46 to slide along the inner wall of the connecting chamber 44. Multiple push columns 58 are externally slidably connected to the inner wall of the fixing plate 41. The fixing plate 41 provides vertical lifting guidance for the push columns 58 through guide holes, restricting the push columns 58 to move only along the axial direction and preventing them from tilting during lifting. The bottom end of the support column 502 is fixedly connected to the inner wall of the top of the cabinet 1. The cabinet 1 provides fixed support for the support column 502, and the support column 502 provides lifting guidance for the moving plate 57. The top ends of multiple retractable rods 501 are fixedly connected to the bottom end of the fixing plate 41. The fixing plate 41 provides fixed support for the retractable rods 501. The retractable rods 501 extend and retract with the connecting bar 59, providing buffering and support for the connecting bar 59. The bottom ends of multiple support blocks 54 are fixedly connected to the inner wall of the top of the cabinet 1. The cabinet 1 provides stable support for the support block 54, and the support block 54 provides a fulcrum for the connecting plate 52 through the pivot 53.

[0036] Working principle: When it is necessary to fix silencer flanges of different sizes, the flanges press against two movable semi-ring plates 401. The two movable semi-ring plates 401 slide on the top of the fixed plate 41. When the movable semi-ring plates 401 slide, on the one hand, the fixed block 491 drives the retraction rod 492 to retract, and on the other hand, the damping column 48 drives the connecting chamber 44 to move. The connecting chamber 44 drives the movable block 43 to slide on the inner wall of the fixed plate 41 and stretch or compress the damping rod 42. At the same time, the connecting chamber 44 drives the fixed plate 41 through the damping column 45. Strip 46 slides on its inner wall, and the fixing strip 46 eventually drives the limiting block 47 to move towards the flange. Together with the moving semi-ring plate 401 driven by the damping column 3 493, the moving plate 494 clamps the flange to achieve effective fixation. When it is necessary to release the flange, press down the pressing block 497 again. The pressing block 497 further pushes the moving semi-ring plate 401 to slide in the opposite direction. The moving semi-ring plate 401 drives the connecting chamber 44 to move in the opposite direction through the damping column 2 48. The connecting chamber 44 moves away from the flange, completing the flange release.

[0037] After the muffler flange inspection is completed, the push rod 495 in the fixing mechanism 4 is pushed downward. The push rod 495 drives the connecting strip 59 fixed on the inner wall at the bottom to move downward synchronously. The connecting strip 59 drives the retractable rod 501 fixed at the top to stretch. The retractable rod 501 supports and limits the connecting strip 59. At the same time, the outer part of the bottom of the push rod 495 drives the rotating connecting block 51 to move downward. The connecting block 51 drives the connecting plate 52 fixed at the bottom to rotate around the externally fixed rotating shaft 53. At the same time, the support blocks 54 at both ends of the rotating shaft 53 provide stable support for the rotation of the connecting plate 52. The connecting shaft 55 fixed on the inner wall of the side close to the connecting plate 52 moves in conjunction with this. The connecting shaft 55 drives the externally rotating connecting block 56 to move upward. The connecting block 56 drives the moving disk 57 fixed at the top to move upward. When the moving disk 57 moves upward, it drives the multiple push columns 58 fixed at the top to slide upward synchronously. Finally, the push columns 58 push the flange upward to a height that is easy to pick up, so as to facilitate the removal of the flange after inspection.

[0038] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A silencer flange flatness testing mechanism, comprising a cabinet, Its features are, A protective shell is fixedly connected to the top of the cabinet, a fixing plate is fixedly connected to the top of the cabinet, a fixing mechanism is fixedly connected to the inner wall of the fixing plate, and a lifting mechanism is rotatably connected to the outside of the fixing mechanism. The fixing mechanism includes a fixing plate, the outside of which is fixedly connected to the inner wall of the fixing plate. Multiple damping rods are fixedly connected to the inner wall of the top of the fixing plate. Moving blocks are fixedly connected to the distal ends of the multiple damping rods. Connecting chambers are fixedly connected to the tops of the multiple moving blocks. Multiple damping columns (first type) are fixedly connected to the adjacent sides of the multiple connecting chambers. Fixing strips are slidably connected to the inner walls of the adjacent sides of the multiple connecting chambers. Limit blocks are fixedly connected to the top ends of the adjacent sides of the multiple fixing strips. Multiple damping columns (second type) are fixedly connected to the distal sides of the multiple connecting chambers. A clamping assembly is slidably connected to the inner wall of the fixing plate.

2. The muffler flange flatness detection mechanism as described in claim 1, characterized in that, The clamping assembly includes two push rods, the outer sides of which are slidably connected to the inner wall of the fixed plate. A pressing block is fixedly connected to the top of each push rod, and a spring is sleeved on the outer side of the top of each push rod. Two movable semi-ring plates are slidably connected to the top of the fixed plate. Fixing blocks are fixedly connected to both sides of each of the two movable semi-ring plates. A retraction rod is fixedly connected to one of the adjacent sides of the two fixing blocks. Two damping columns are fixedly connected to one of the adjacent sides of each of the two movable semi-ring plates. A movable plate is fixedly connected to one of the adjacent sides of each of the damping columns. Multiple support rods are fixedly connected to the bottom of the fixed plate.

3. The muffler flange flatness detection mechanism as described in claim 2, characterized in that, The lifting mechanism includes two connecting bars. The two connecting bars are fixedly connected to the inner wall of the bottom end of the push rod. Two connecting blocks are rotatably connected to the outer bottom end of each of the two push rods. A connecting plate is fixedly connected to the bottom end of each of the two connecting blocks. A rotating shaft is fixedly connected to the outer side of each of the two connecting plates. A support block is rotatably connected to both ends of each of the two rotating shafts. A connecting shaft is rotatably connected to the inner wall of each of the two connecting plates on adjacent sides. A connecting block is rotatably connected to the outer side of each of the two connecting shafts. A movable disk is fixedly connected to the top of each of the two connecting blocks. Multiple push columns are fixedly connected to the top of the movable disk. A support column is fixedly connected to the bottom end of the movable disk. Two retractable rods are fixedly connected to the top of each of the two connecting bars.

4. The muffler flange flatness detection mechanism as described in claim 2, characterized in that, The bottom ends of the multiple support rods are fixedly connected to the inner wall of the top of the cabinet, and the far sides of the multiple damping columns are fixedly connected to the near sides of the two movable semi-ring plates.

5. The muffler flange flatness detection mechanism as described in claim 2, characterized in that, The bottom ends of the two pressing blocks are slidably connected to the outer sides of the two movable semi-ring plates, and the bottom ends of the two springs are fixedly connected to the top of the fixed plate.

6. The muffler flange flatness detection mechanism as described in claim 2, characterized in that, The bottom ends of the plurality of movable plates are slidably connected to the top of the fixed plate, and the far sides of the plurality of fixed strips are fixedly connected to the near sides of the plurality of damping columns.

7. The muffler flange flatness detection mechanism as described in claim 3, characterized in that, The outer surfaces of the plurality of push columns are slidably connected to the inner wall of the fixed plate, and the bottom ends of the support columns are fixedly connected to the top inner wall of the cabinet.

8. The muffler flange flatness detection mechanism as described in claim 3, characterized in that, The top ends of the multiple retractable rods are fixedly connected to the bottom end of the fixed plate, and the bottom ends of the multiple support blocks are fixedly connected to the top inner wall of the cabinet.

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