A welding quality inspection device for electric vehicle radiators

Abstract

This invention relates to the field of welding quality inspection, specifically to a welding quality inspection device for electric vehicle radiators. The device includes a connecting plate for supporting and connecting the radiator, on which a hydraulic oil radiator is mounted; a testing mechanism for inspecting the welding areas of the radiator, mounted on the connecting plate; and a driving mechanism for operating the testing mechanism, mounted on the testing mechanism. The driving mechanism includes a rack with a groove on its outer side, and a support plate slidingly fitted inside the groove. In this electric vehicle radiator welding quality inspection device, a first marker pen is indirectly brought into contact with a second test plate via a roller shaft. This ensures that when the roller is pressed against the recessed area of ​​the welding area, the first marker pen contacts the second test plate and leaves a mark.

Description

Technical Field

[0001] This invention relates to the field of welding quality inspection technology, specifically to a welding quality inspection device for electric vehicle radiators. Background Technology

[0002] The welding quality of radiators (mostly made of aluminum or copper, used for heat dissipation of components such as motors and batteries) directly affects heat dissipation efficiency and safety. Defects such as incomplete welding or missing welding may lead to coolant leakage, heat dissipation failure, or even circuit failure or fire.

[0003] The existing radiator welding quality inspection equipment for electric vehicles has the following problems: it cannot simultaneously inspect and process incomplete welds, weld beads, and weld seams, and it cannot pinpoint the precise location of incomplete welds, weld beads, and weld seams at the weld joint. As a result, operators need to use multiple methods to check and inspect the equipment sequentially. Summary of the Invention

[0004] The present invention provides a welding quality inspection device for electric vehicle radiators to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding quality inspection device for electric vehicle radiators, comprising a connecting plate for supporting and connecting electric vehicle radiators, wherein a hydraulic oil radiator is provided on the connecting plate;

[0006] A testing mechanism is used to perform quality inspection on the welded parts of the radiator of a tram, and the testing mechanism is installed on the connecting plate.

[0007] A drive mechanism for driving the detection mechanism to perform processing is provided on the detection mechanism;

[0008] The drive mechanism includes a rack with a groove on its outer side. A support plate is slidably fitted inside the groove. A central shaft is connected to the center of the support plate via a bearing. A gear is fixedly connected to the center of the outer side of the central shaft. The gear meshes with the rack for transmission.

[0009] Preferably, an extension plate is rotatably mounted at the end of the central shaft away from the support plate, a second connecting rod is fixedly connected to the top of the extension plate, and a first connecting rod is fixedly connected to the outer side of the second connecting rod.

[0010] Preferably, a first double connecting rod and a second double connecting rod are fixedly connected to the center of the bottom of the extension plate;

[0011] The number of No. 1 double link and No. 2 double link is several.

[0012] Preferably, the detection mechanism includes an infusion tube, which is fixedly installed on the top of the connecting plate. The outer side of the infusion tube is welded to the hydraulic oil radiator. A clamping member is inserted into the top of the infusion tube, and the top of the clamping member is fixedly connected to the rack.

[0013] The clamping element is used to support the drive mechanism.

[0014] Preferably, the outer end face of the clamping member is connected to a retention plate by a rod, and an air blowing head and a test paper are symmetrically arranged on both sides of the retention plate, wherein the top of the air blowing head is fixedly connected to the first connecting rod, and the top of the test paper is fixedly connected to the second connecting rod.

[0015] The air blowing head moves downwards along the welded outer wall of the retention plate and the infusion tube, while the test paper moves downwards along the interior of the retention plate and the infusion tube.

[0016] Preferably, the side of the blowing head away from the retention plate is connected to an external blowing device, and the gas blown out by the blowing head is ammonia, while the test paper is red litmus paper. Both are used to perform weld seam detection at the weld joint.

[0017] The outer sides of the clamping member are respectively fixedly connected to test plate No. 1 and test plate No. 2.

[0018] Preferably, a first sliding sleeve is fixedly connected to the bottom of the first double connecting rod, and elastic telescopic rods are symmetrically arranged at both ends of the inner cavity of the first sliding sleeve. A roller shaft is fixedly connected to the end of the elastic telescopic rod away from the first sliding sleeve.

[0019] A fitting roller is rotatably mounted on the outer side of the roller shaft via a block component, wherein the fitting roller moves downward along the inner wall of the welded joint of the infusion tube.

[0020] Preferably, the roller shaft is slidably adapted to the inside of the first sliding sleeve, and the end of the roller shaft away from the first sliding sleeve is slidably adapted to the second sliding sleeve, and the top of the second sliding sleeve is fixedly connected to the second double connecting rod.

[0021] The meshing transmission of the gear and the rack causes the bonding roller to move downwards and detect the flatness of the weld.

[0022] Preferably, a shaft sleeve is fixedly connected to the outer side of the roller shaft, a first marker is fixedly connected to one end of the shaft sleeve, and a second test plate is provided at the end of the first marker away from the shaft sleeve;

[0023] When a dent appears at the welded joint inside the infusion tube, the bonding roller will move inward toward the dent, eventually causing the first marker to adhere to the second test plate and leave a mark.

[0024] Preferably, a slotted hollow tube is fixedly installed at the end of the shaft sleeve away from the first marker, a first magnetic block is fixedly connected inside the slotted hollow tube, a second marker is slidably adapted in the slot inside the slotted hollow tube, and a second magnetic block is fixedly connected at the end of the second marker close to the slotted hollow tube, wherein the first magnetic block and the second magnetic block maintain a repulsive relationship.

[0025] A sleeve is fixedly connected to the outside of the slotted hollow tube, and a third marker is fixedly installed inside the sleeve. When a protrusion appears at the welded joint inside the infusion tube, the bonding roller will move outward along the protrusion, eventually causing the second marker to be drawn into the slotted hollow tube, while the third marker will be bonded to the first test plate and leave a mark.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The tension of the elastic telescopic rod near the weld is less than that of the elastic telescopic rod on the other side. This is so that when the contact roller touches the recessed part of the weld, the two elastic telescopic rods with different elastic forces will make the contact roller fit tightly against the recessed part of the weld, rather than being suspended in the air.

[0028] 2. When a dent appears at the weld joint, the roller shaft will indirectly bring the first marker into contact with the second test plate. This ensures that when the roller is pressed against the dent at the weld joint, the first marker will make contact with the second test plate and leave a mark. The operator can then use the mark left on the second test plate to determine which part of the weld joint is missing and promptly repair it.

[0029] 3. When the weld joint is on a flat surface, the third marker will not come into contact with the first test plate. However, when weld beads appear, the third marker will come into contact with the first test plate and leave a line similar to a dash. This allows the operator to determine which part of the weld joint has weld beads by looking at the mark left on the first test plate, and then promptly cut and repair the weld.

[0030] 4. Ammonia gas is sprayed out by moving the air nozzle downwards along the outer wall of the infusion tube weld joint, while the test paper moves downwards from the inside of the infusion tube. If a weld seam appears at the weld joint, the ammonia gas will come into contact with the red litmus paper and turn blue at that location on the paper. This allows the operator to determine which part of the weld seam is present by observing the color change of the test paper, and then promptly repair the weld. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the external structure of an electric vehicle radiator welding quality inspection device according to the present invention.

[0032] Figure 2 This is a structural schematic diagram of the overall components of the present invention.

[0033] Figure 3 This is a front view schematic diagram of the driving mechanism of the present invention.

[0034] Figure 4 This is a rear view schematic diagram of the driving mechanism of the present invention.

[0035] Figure 5 This is a schematic diagram of the detection mechanism of the present invention.

[0036] Figure 6 This is a rear view schematic diagram of the detection mechanism of the present invention.

[0037] Figure 7 This is a cross-sectional structural diagram of the detection mechanism of the present invention.

[0038] Figure 8 This is a side view schematic diagram of the cross-sectional structure of the detection mechanism of the present invention.

[0039] Figure 9 This is a schematic diagram of the structure of the first component of the detection mechanism of the present invention.

[0040] Figure 10 This is a top view of the second component of the detection mechanism of the present invention.

[0041] Figure 11 This is a cross-sectional structural diagram of the second component of the detection mechanism of the present invention.

[0042] In the diagram: 1. Hydraulic oil cooler; 2. Connecting plate; 3. Drive mechanism; 4. Detection mechanism; 31. Rack; 32. Tank; 33. Support plate; 34. Central shaft; 35. Gear; 36. Extension plate; 37. Connecting rod No. 1; 38. Connecting rod No. 2; 30. Double connecting rod No. 1; 301. Double connecting rod No. 2; 41. Infusion tube; 42. Clamping component; 43. Retention plate; 44. Air blowing head; 45. 46. ​​Test strip; 47. Test plate number 1; 48. Roller shaft; 49. Adhesive roller; 40. Sliding bushing number 1; 401. Elastic telescopic rod; 402. Sliding bushing number 2; 403. Shaft sleeve; 404. First marker; 405. Slotted hollow tube; 406. Magnetic block number 1; 407. Second marker; 408. Magnetic block number 2; 409. Tube sleeve; 400. Third marker. Detailed Implementation

[0043] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] Please see Figures 1 to 11 The present invention provides a technical solution: such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a connecting plate 2 for supporting and connecting the tram radiator, and a hydraulic oil radiator 1 is provided on the connecting plate 2.

[0045] Inspection mechanism 4 is used to perform quality inspection on the welded parts of the tram radiator. Inspection mechanism 4 is installed on the connecting plate 2.

[0046] The drive mechanism 3 is used to drive the detection mechanism 4 to operate and process, and the drive mechanism 3 is installed on the detection mechanism 4.

[0047] The drive mechanism 3 includes a rack 31, a groove 32 is provided on the outer side of the rack 31, a support plate 33 is slidably fitted inside the groove 32, a central shaft 34 is connected to the center of the support plate 33 through a bearing, and a gear 35 is fixedly connected to the center of the outer side of the central shaft 34. The gear 35 meshes with the rack 31 for transmission.

[0048] An extension plate 36 is rotatably mounted on the end of the central shaft 34 away from the support plate 33. A second connecting rod 38 is fixedly connected to the top of the extension plate 36, and a first connecting rod 37 is fixedly connected to the outside of the second connecting rod 38.

[0049] The center of the bottom of the extension plate 36 is fixedly connected to a first double connecting rod 30 and a second double connecting rod 301.

[0050] The number of No. 1 double link 30 and No. 2 double link 301 is several.

[0051] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the detection mechanism 4 includes an infusion tube 41, which is fixedly installed on the top of the connecting plate 2. The outer side of the infusion tube 41 is welded to the hydraulic oil radiator 1. A clamping member 42 is inserted into the top of the infusion tube 41, and the top of the clamping member 42 is fixedly connected to the rack 31.

[0052] The clamping member 42 is used to support the drive mechanism 3;

[0053] The outer end face of the clamping member 42 is connected to the retention plate 43 by a rod. On both sides of the retention plate 43, there are air blowing heads 44 and test paper 45 respectively. The top of the air blowing head 44 is fixedly connected to the first connecting rod 37, and the top of the test paper 45 is fixedly connected to the second connecting rod 38.

[0054] The blowing head 44 moves downward along the welded outer wall of the retention plate 43 and the infusion tube 41, while the test paper 45 moves downward along the interior of the retention plate 43 and the infusion tube 41. As the extension plate 36 moves downward, the second connecting rod 38 and the first connecting rod 37, which are fixedly connected to its top, move downward along the retention plate 43 and the infusion tube 41, respectively, carrying the test paper 45 and the blowing head 44. The blowing head 44 moves downward along the outer wall of the welded joint of the infusion tube 41 and sprays ammonia gas, while the test paper 45 moves downward from the interior of the infusion tube 41. If a weld seam appears at the welded joint, the ammonia gas will come into contact with the red litmus test paper 45 and turn blue at that location on the test paper 45. This allows the operator to determine which part of the weld seam appears by observing the color change of the test paper 45 and then promptly perform repair welding.

[0055] The side of the air blowing head 44 away from the retaining plate 43 is connected to an external air blowing device, and the gas blown out by the air blowing head 44 is ammonia gas, while the test paper 45 uses red litmus paper. Both are used to inspect the weld seam. The retaining plate 43 is used to initially block and limit the air blowing head 44 and the test paper 45, because they are located above the contact roller 49, so the retaining plate 43 is needed to block and support them.

[0056] The outer side of the clamping member 42 is fixedly connected to the first test plate 46 and the second test plate 47 respectively;

[0057] The bottom of the first double connecting rod 30 is fixedly connected to the first sliding sleeve 40. Both ends of the inner cavity of the first sliding sleeve 40 are symmetrically provided with elastic telescopic rods 401. The end of the elastic telescopic rod 401 away from the first sliding sleeve 40 is fixedly connected to the roller shaft 48.

[0058] A contact roller 49 is rotatably mounted on the outer side of the roller shaft 48 via a block component. The contact roller 49 moves downward along the inner wall of the welded joint of the infusion tube 41. By inserting the clamping member 42 onto the infusion tube 41, the drive gear 35 meshes downward along the rack 31. The support plate 33 is used to limit the gear 35 to prevent it from shaking during meshing. As the gear 35 meshes downward, the internal bearing connected to it... The spindle 34 will move downwards along with the extension plate 36, while the first double connecting rod 30 and the second double connecting rod 301, which are respectively connected to the bottom of the extension plate 36, will move downwards. Subsequently, the first sliding sleeve 40 and the second sliding sleeve 402, which are respectively connected to the first double connecting rod 30 and the second double connecting rod 301, will drive the roller shaft 48 to move downwards. The fitting roller 49, which is rotatably connected to the roller shaft 48 through the block component, will roll downwards along the welded part of the inner wall of the infusion tube 41.

[0059] The roller shaft 48 is slidably fitted inside the first sliding sleeve 40. The end of the roller shaft 48 away from the first sliding sleeve 40 is slidably fitted with the second sliding sleeve 402. The top of the second sliding sleeve 402 is fixedly connected to the second double connecting rod 301. The contact roller 49 and the block piece rotate with the roller shaft 48. In addition, there are four elastic telescopic rods 401, and they are arranged in pairs inside the first sliding sleeve 40 and the second sliding sleeve 402 respectively. The tension of the elastic telescopic rod 401 near the welding point is less than the tension of the elastic telescopic rod 401 on the other side. This is so that when the contact roller 49 touches the recessed part of the welding point, under the action of the two elastic telescopic rods 401 with different elastic forces, the contact roller 49 will be tightly attached to the recessed part of the welding point, rather than suspended in the air. The other two sets of elastic telescopic rods 401 also have another function: the contact rollers 49 will constantly exert pressure on the welding parts, and this pressure will break the poor weld parts, while the pressure will not damage the weld beads.

[0060] The meshing transmission of gear 35 and rack 31 causes the bonding roller 49 to move downward and detect the flatness of the weld.

[0061] A shaft sleeve 403 is fixedly connected to the outer side of the roller shaft 48. A first marker 404 is fixedly connected to one end of the shaft sleeve 403. A second test plate 47 is provided at the end of the first marker 404 away from the shaft sleeve 403. The first double connecting rod 30 and the second double connecting rod 301 respectively play the role of supporting and limiting the first sliding shaft sleeve 40 and the second sliding shaft sleeve 402. Furthermore, when a depression appears at the weld joint on the inner wall of the infusion tube 41, the elastic force of the elastic telescopic rod 401 causes the roller shaft 48 to move along the first sliding sleeve 40 and the second sliding sleeve 402 towards the depression. The outer side of the roller shaft 48 is connected to the first marker 404 via the shaft sleeve 403. Initially, when the weld joint is flat, the first marker 404 does not contact the second test plate 47. However, when a depression appears at the weld joint, the roller shaft 48 indirectly brings the first marker 404 into contact with the second test plate 47. This ensures that when the contact roller 49 is pressed tightly against the depression at the weld joint, the first marker 404 contacts the second test plate 47 and leaves a mark. The operator can then use the mark left on the second test plate 47 to determine which part of the weld joint is missing and promptly repair it.

[0062] When a dent appears at the welded joint inside the infusion tube 41, the contact roller 49 will move inward toward the dent, eventually causing the first marker 404 to come into contact with the second test plate 47 and leave a mark.

[0063] A slotted hollow tube 405 is fixedly installed at the end of the shaft sleeve 403 away from the first marker 404. A first magnetic block 406 is fixedly connected inside the slotted hollow tube 405. A second marker 407 is slidably adapted in the slot inside the slotted hollow tube 405. A second magnetic block 408 is fixedly connected at the end of the second marker 407 near the slotted hollow tube 405. The first magnetic block 406 and the second magnetic block 408 maintain a repulsive relationship.

[0064] A sleeve 409 is fixedly connected to the outside of the slotted hollow tube 405. A third marker 400 is fixedly installed inside the sleeve 409. When a protrusion appears at the weld joint inside the infusion tube 41, the contact roller 49 moves outward along the protrusion, eventually causing the second marker 407 to be retracted into the slotted hollow tube 405. The third marker 400 then contacts the first test plate 46 and leaves a mark. When weld beads appear at the weld joint, the contact roller 49 is squeezed by the weld beads and moves outward in the opposite direction. Subsequently, the slotted hollow tube 405, connected to the other end of the shaft sleeve 403, moves towards the first test plate 46. At the same time, the second marker 407 is retracted into the slotted hollow tube 405 and thickens the lines on the first test plate 46. The function of the second marker 407 is to record the smooth parts of the weld joint. Additionally, a third marker 400 is connected to the outside of the slotted hollow tube 405 via a sleeve 409. The length of the third marker 400 is shorter than that of the second marker 407. Therefore, when the weld is on a flat surface, the third marker 400 will not come into contact with the first test plate 46. However, when weld beads appear, the third marker 400 will come into contact with the first test plate 46 and leave a line similar to a dash. This allows the operator to determine which part of the weld has weld beads by looking at the mark left on the first test plate 46, and then promptly cut and repair the weld.

[0065] In use, the present invention is as follows: First, the clamping member 42 is inserted into the infusion tube 41. Then, the drive gear 35 meshes downward along the rack 31. Next, the central shaft 34, which is connected to the rack 31 through a bearing, moves downward along with the extension plate 36. The first double connecting rod 30 and the second double connecting rod 301, which are respectively connected to the bottom of the extension plate 36, move downward. Then, the first sliding sleeve 40 and the second sliding sleeve 402, which are respectively connected to the first double connecting rod 30 and the second double connecting rod 301, drive the roller shaft 48 to move downward. The fitting roller 49, which is rotatably connected to the roller shaft 48 through a block, rolls downward along the welded part of the inner wall of the infusion tube 41. In addition, there are four elastic telescopic rods 401, and they are arranged in pairs inside the first sliding sleeve 40 and the second sliding sleeve 402 respectively. The tensile force of the elastic telescopic rod 401 near the welding point is less than that of the elastic telescopic rod 401 on the other side. Under the action of the two elastic telescopic rods 401 with different elastic forces, the contact roller 49 will constantly exert pressure on the welding part, and these pressures will break the poorly welded part.

[0066] When a dent appears at the weld joint on the inner wall of the infusion tube 41, the elastic force of the elastic telescopic rod 401 causes the roller shaft 48 to move along the first sliding sleeve 40 and the second sliding sleeve 402 towards the dent. The outer side of the roller shaft 48 is connected to the first marker 404 via the shaft sleeve 403. Initially, when the weld joint is flat, the first marker 404 does not contact the second test plate 47. However, when a dent appears at the weld joint, the roller shaft 48 indirectly brings the first marker 404 into contact with the second test plate 47. The operator can then determine which part of the weld joint has a missing weld by observing the mark left on the second test plate 47. When weld beads appear at the weld joint, the contact roller 49 will be squeezed by the weld beads and move outward in the opposite direction. Subsequently, the slotted hollow tube 405, which is connected to the other end of the shaft sleeve 403, will move towards the first test plate 46. At the same time, the second marker 407 will be retracted into the slotted hollow tube 405 and will thicken the lines on the first test plate 46. In addition, a third marker 400 is connected to the outside of the slotted hollow tube 405 through the tube sleeve 409. The length of the third marker 400 is shorter than that of the second marker 407. Therefore, when the weld joint is on a flat path, the third marker 400 will not come into contact with the first test plate 46. However, when weld beads appear, the third marker 400 will come into contact with the first test plate 46 and leave a line similar to a dash.

[0067] As the extension plate 36 moves downward, the second connecting rod 38 and the first connecting rod 37, which are fixedly connected to its top, move downward along the retention plate 43 and the infusion tube 41, carrying the test paper 45 and the air blowing head 44 respectively. The air blowing head 44 moves downward along the outer wall of the welded joint of the infusion tube 41 and sprays ammonia gas, while the test paper 45 moves downward from the inside of the infusion tube 41. If a weld seam appears at the welded joint, the ammonia gas will come into contact with the red litmus paper 45 and turn blue at that location. The retention plate 43 serves to initially block and limit the air blowing head 44 and the test paper 45, as they are located above the contact roller 49, thus requiring the retention plate 43 for blocking and support.

[0068] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made by those skilled in the art based on the above concepts without creative effort shall fall within the scope of protection of the present invention.

Claims

1. An electric vehicle radiator welding quality detection device, characterized in that, The utility model relates to a connecting plate spare for supporting and connecting treatment of electric car radiator, and the connecting plate spare is provided with hydraulic oil radiator. A detection mechanism for quality detection treatment of electric car radiator welding position is arranged on the connecting plate spare. A driving mechanism for driving the detection mechanism to run is arranged on the detection mechanism. The driving mechanism includes a rack, a groove is formed on the outer side of the rack, a support shaft plate is slidably fitted in the groove, a center shaft is connected to the center of the support shaft plate through a bearing, a gear is fixedly connected to the center of the outer side of the center shaft, and the gear is in meshing transmission with the rack. An extension plate is rotatably installed at one end of the center shaft away from the support shaft plate, a second connecting rod is fixedly connected to the top of the extension plate, and a first connecting rod is fixedly connected to the outer side of the second connecting rod. A first double connecting rod and a second double connecting rod are fixedly connected to the center of the bottom of the extension plate. The number of the first double connecting rod and the second double connecting rod is several. The detection mechanism includes a liquid delivery tube, which is fixedly installed on the top of the connecting plate spare, and the outer side of the liquid delivery tube is welded with the hydraulic oil radiator.

2. The electric vehicle radiator welding quality detection device according to claim 1, characterized in that: The top of the liquid delivery tube is inserted with a clamping piece, and the clamping piece is fixedly connected with the rack. The clamping piece is used for supporting the driving mechanism.

3. The electric vehicle radiator welding quality detection device according to claim 2, characterized in that: The outer end surface of the clamping piece is connected with a retention plate through a rod, a gas blowing head and a test paper are symmetrically arranged on the two sides of the retention plate, the top of the gas blowing head is fixedly connected with the first connecting rod, and the top of the test paper is fixedly connected with the second connecting rod. The gas blowing head moves downward along the welded outer wall of the retention plate and the liquid delivery tube in sequence, and the test paper moves downward along the inside of the retention plate and the liquid delivery tube in sequence.

4. The electric vehicle radiator welding quality detection device according to claim 3, characterized in that: The side of the gas blowing head away from the retention plate is connected with an external gas blowing device, the gas blown by the gas blowing head is ammonia gas, the test paper is red litmus paper, and the two are used for welding seam detection treatment of the welded part. The outer side of the clamping piece is fixedly connected with a first test plate and a second test plate.

5. The electric vehicle radiator welding quality detection device according to claim 2, characterized in that: The bottom of the first double connecting rod is fixedly connected with a first sliding shaft sleeve, elastic expansion rods are symmetrically arranged at the two ends of the inner cavity of the first sliding shaft sleeve, and a roller shaft is fixedly connected to one end of the elastic expansion rod away from the first sliding shaft sleeve. A matching roller is rotatably installed on the outer side of the roller shaft through a block piece, and the matching roller moves downward along the inner wall of the welded part of the liquid delivery tube.

6. The electric vehicle radiator welding quality detection device according to claim 5, characterized in that: The roller shaft is slidably fitted in the first sliding shaft sleeve, a second sliding shaft sleeve is slidably fitted to one end of the roller shaft away from the first sliding shaft sleeve, and the top of the second sliding shaft sleeve is fixedly connected with the second double connecting rod. The meshing transmission of the gear and the rack enables the matching roller to move downward and detect the flatness of the welded part.

7. The electric vehicle radiator welding quality detection device according to claim 5, characterized in that: The outer side of the roller shaft is fixedly connected with a shaft joint sleeve, a first marker pen is fixedly connected to one end of the shaft joint sleeve, and a second test plate is arranged at one end of the first marker pen away from the shaft joint sleeve. When the welding part inside the infusion tube is concave, the fitting roller moves inward to the concave part, finally makes the first marker pen fit with the second test board and leaves a mark.

8. The electric vehicle radiator welding quality detection device according to claim 7, characterized in that: The end of the shaft sleeve away from the first marker pen is fixedly installed with a slotted hollow tube, the inside of the slotted hollow tube is fixedly connected with a first magnetic block, the inside of the slotted hollow tube is slidably fitted with a second marker pen, the end of the second marker pen close to the slotted hollow tube is fixedly connected with a second magnetic block, and the first magnetic block and the second magnetic block keep repelling relationship. The outside of the slotted hollow tube is fixedly connected with a sleeve, the inside of the sleeve is fixedly installed with a third marker pen, and when the welding part inside the infusion tube is convex, the fitting roller moves outward along the convex part, finally makes the second marker pen enter into the slotted hollow tube, and the third marker pen fits with the first test board and leaves a mark.

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