Device and method for detecting cold and hot alternating resistance of decoration strip of new energy automobile

Abstract

The invention belongs to the technical field of automobile part detection, and particularly relates to a new energy automobile trim strip cold and hot alternating resistance detection device and method.The new energy automobile trim strip cold and hot alternating resistance detection device comprises a detection box and an experiment bin formed in the detection box, a detection table is arranged in the detection box, and a plurality of movable guide grooves are formed in the detection table; a transmission lead screw is arranged in each moving guide groove; each transmission lead screw is sleeved with at least two sets of movable clamping mechanisms, and the two sets of movable clamping mechanisms are used for clamping a decoration strip to be detected to the position above the detection table. Each movable clamping mechanism is provided with a conversion torsion assembly, and the conversion torsion assemblies are used for conducting torsion on the clamped decoration strips. According to the invention, the decorative strip can be subjected to torsional deformation in a stretched or non-stretched state, so that the effect of detecting the cold and hot alternating resistance of the decorative strip in different states can be further realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile parts detection, and in particular relates to a device and method for detecting the hot and cold alternating performance of a decorative strip of a new energy automobile. Background Art

[0002] Automobile decorative strips are an important part of automobile interior components. Decorative strips are decorative accessories with decorative effects. The quality inspection of automobile decorative strips is very strict. When producing automobile decorative strips, various performance tests need to be carried out on them, such as thermal aging performance, resistance to hot and cold alternation performance, etc.

[0003] Although the existing hot and cold alternating detection device can perform hot and cold alternating resistance performance test on automobile decorative panels or decorative strips, since automobile decorative strips need to be subjected to different degrees of stretching, extrusion or torsional deformation during actual use, and the existing hot and cold alternating detection device can only perform hot and cold alternating performance test on decorative strips in a static environment, it is impossible to perform hot and cold alternating performance test on the automobile decorative strips in different states according to the degree of deformation they are subjected to in the actual environment, which will affect the accuracy and efficiency of the hot and cold alternating resistance performance test device in performing hot and cold alternating resistance performance test on automobile decorative strips in different states. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a device for testing the hot-cold alternating performance of a decorative strip of a new energy vehicle, comprising a testing box and an experimental chamber formed inside, wherein a testing platform is arranged inside the testing box, and a plurality of movable guide grooves are opened on the testing platform, and a transmission screw is arranged in each movable guide groove; At least two sets of mobile clamping mechanisms are sleeved on each of the transmission screws, and the two sets of mobile clamping mechanisms are used to clamp the decorative strips to be tested above the testing table; Each group of the mobile clamping mechanisms is provided with a conversion and twisting assembly, and the conversion and twisting assembly is used to twist the clamped decorative strips.

[0005] Furthermore, the mobile clamping mechanism includes a moving block, a synchronous belt, a pulley, a ball nut, a bearing, a fixed vertical plate, a support tube and a clamping cylinder. A through hole is penetrated through the moving block, and a transmission hole is opened upward at the center of the through hole. A synchronous belt is arranged on the bottom of the transmission hole for rotation upward, and the synchronous belt extends upward to the top of the moving block. The ball nut is inserted into the through hole, and the pulley fixed on the ball nut is meshed with the synchronous belt in the transmission hole for transmission. The ball nut is connected to the moving block through a bearing. A fixed vertical plate is fixed to the upper end side of the moving block, and a support tube is rotatably installed on the fixed vertical plate through a bearing, and a pulley meshed with the synchronous belt is also sleeved on the support tube. A conversion torsion component is provided on the moving block, and a clamping cylinder is installed on the end of the conversion torsion component. The ball nut is sleeved on the transmission screw, and the moving block is located in the moving guide groove.

[0006] Furthermore, the diameter of the hole on one side of the through hole is larger than the diameter of the hole on the other side, a bearing is fixed in the hole with a small diameter of the through hole, another bearing is fixed on the ball nut, and the outer ring of the bearing is rotatably inserted into the hole with a large diameter of the through hole, one end of the ball nut extends out of the through hole and is locked and fixed by a locking nut, and the flange nut of the ball nut is fitted to the hole with a large diameter of the through hole.

[0007] Furthermore, the conversion and torsion assembly includes a driven bevel gear, a U-shaped frame, an active bevel gear, a drive shaft, a sliding vertical plate and an electric push rod, the driven bevel gear is sleeved on the support tube, and the driven bevel gear is located on the outer side of the fixed vertical plate, the outer side of the fixed vertical plate is provided with a U-shaped frame, and a servo motor is fixedly provided in the U-shaped groove of the U-shaped frame, the output shaft of the servo motor rotates upward and passes through the U-shaped frame to be provided with an active bevel gear, the active bevel gear is meshed with the driven bevel gear, the support tube is penetrated and inserted with a drive shaft, and a clamping cylinder is installed at one end of the drive shaft, and a driven bevel gear is also installed at the other end thereof, and the driven bevel gear corresponds to the driven bevel gear on the support tube, the other side wall of the moving block is provided with a sliding vertical plate, and the sliding vertical plate is connected to the extended drive shaft through a bearing, the sliding vertical plate is connected to the fixed rods of at least two electric push rods, and the output rod of the electric push rod is connected to the fixed vertical plate.

[0008] Furthermore, square sliding sleeves are correspondingly fixed on the fixed vertical plate and the sliding vertical plate, and a square sliding rod is slidably inserted in the square sliding sleeve, one end of the square sliding rod is fixed on the vertical plate of the U-shaped frame, and the other end of the square sliding rod slides out of the sliding vertical plate, a metal suction strip is insulated and installed on the square sliding rod, an electromagnetic suction block is insulated and installed on the inner wall of the square sliding sleeve, and the electromagnetic suction block is in sliding and fitting contact with the metal suction strip.

[0009] Furthermore, a U-shaped slot is opened upward at the bottom of the sliding vertical plate, and the slot width of the U-shaped slot is the same as the front and rear width of the moving block. The top of the moving block extends out of the upper surface of the detection table, and the U-shaped slot is slidably sleeved on the top of the moving block extending upward.

[0010] Furthermore, the movable block is provided with an elastic buckle assembly, and the elastic buckle assembly includes a sac-shaped thin plate, a guide tube, a sac-shaped column, a reset spring and an insert block. Sac-shaped thin plates are fixedly provided on both sides of the protruding end of the movable block, and the sac-shaped thin plate is in extrusion contact with the U-shaped slot, and the sac-shaped thin plate is connected with the guide tube. Deep holes are provided on both side walls of the movable block, and sac-shaped columns are provided in the deep holes. A reset spring is provided in the sac-shaped column, and the guide tube is connected to the sac-shaped column. An insert block is fixedly provided on the outer end of the sac-shaped column, and a plurality of sockets are provided on both side walls of the movable guide slot, and the sockets correspond to the plug block.

[0011] A method for testing the hot-cold-hot alternating performance of a new energy vehicle decorative strip, which is applicable to the above-mentioned device for testing the hot-cold-hot alternating performance of a new energy vehicle decorative strip, comprises the following steps: S1: Sample preparation: According to the specific test requirements, select 3 decorative strip test samples with a specification of 30mm*100mm, clamp the 3 test samples to each set of symmetrical mobile clamping mechanisms in turn, and then close the door of the test chamber; S2: Test parameter setting: Set the test chamber to the following cycle: 25℃~28℃ rise to 78℃~82℃, 80%RH, 45~65 minutes of heating time, 3h~5h of storage at 80%RH, 78℃~82℃; cool to -35℃~-42℃, 65~100 minutes of cooling time, 3h~5h of storage at -35℃~-42℃; perform 6~9 cycles in total; S3: Temperature monitoring: During the test, the temperature of the sample is monitored and recorded in real time using temperature sensors and data logging equipment; S4: Test result analysis: Based on the temperature data obtained after the test, analyze the stress and strain of the test samples at different temperatures to evaluate the hot and cold cycling resistance of the decorative strips.

[0012] The present invention has the following beneficial effects: 1. The present invention arranges multiple groups of symmetrical mobile clamping mechanisms on the test platform, and the mobile block is sleeved on the transmission screw through the ball nut, and the horizontal sliding of the mobile block is achieved through the mutual transmission cooperation between the synchronous belt and the pulley sleeved on the ball nut, and then the sliding of the symmetrical mobile block can first make the clamping claw cylinders approach each other to clamp and fix the decorative strip, and then the mobile blocks move away from each other, so as to facilitate the stretching and deformation of the clamped decorative strip, and realize the cold and heat alternating performance test of the decorative strip in the stretched state, and the conversion torsion component on the mobile block can twist and deform the decorative strip clamped by the clamping claw cylinder, so that the decorative strip can be twisted and deformed in the stretched or non-stretched state, and then can further achieve the effect of the cold and heat alternating performance test of the decorative strip in different states.

[0013] 2. The present invention installs the conversion torsion component on the fixed vertical plate, and the output rod of the electric push rod is retracted and extended, which can not only push the driven bevel gear at the end of the driving shaft to slide and disengage from the meshing transmission with the active bevel gear. At this time, the moving block can slide alone in the moving guide groove to achieve stretching or relaxation drive of the clamped decorative strip, but also push the driven bevel gear and the active bevel gear at the end of the driving shaft to slide synchronously. At this time, the driving shaft will drive the clamped decorative strip to twist and deform through the clamping claw cylinder, and then the clamped decorative strip can be stretched, twisted or stretched and twisted stably and quickly switched, thereby further improving the stability and accuracy of the hot and cold alternating performance detection of the decorative strip under different states.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the embodiment disclosed in the present invention; Figure 2 It is an overall structural diagram of multiple groups of mobile clamping mechanisms on the detection platform of the disclosed embodiment of the present invention; Figure 3 It is a structural schematic diagram of a mobile clamping mechanism and a conversion and torsion assembly in an embodiment disclosed by the present invention; Figure 4 Disclose embodiments of the present invention Figure 3 Perspective view of the middle jaw cylinder; Figure 5This is a schematic diagram of the transmission structure of a synchronous belt and a pulley in the disclosed embodiment of the present invention; Figure 6 It is a structural schematic diagram of a moving block in an embodiment disclosed in the present invention; Figure 7 Disclose embodiments of the present invention Figure 6 A partial enlarged view of point A in the middle.

[0017] In the figure: 1. Testing box; 2. Experimental warehouse; 3. Testing table; 31. Moving guide groove; 32. Socket; 4. Transmission screw; 5. Mobile clamping mechanism; 51. Mobile block; 511. Through hole; 512. Transmission hole; 52. Synchronous belt; 53. Pulley; 54. Ball nut; 55. Bearing; 56. Fixed vertical plate; 57. Support tube; 58. Clamping claw cylinder; 59. Locking nut; 6. Conversion torsion assembly; 61. Driven bevel gear; 62. U-shaped frame; 63. Active bevel gear; 64. Driving shaft; 65. Sliding vertical plate; 651. U-shaped slot; 66. Electric push rod; 67. Square sliding sleeve; 68. Square sliding rod; 69. Metal suction strip; 7. Elastic buckle assembly; 71. Bag-shaped thin plate; 72. Guide tube; 73. Bag-shaped column; 74. Return spring; 75. Insert block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] See also Figure 1-Figure 7 As shown, the present invention is a device for testing the hot and cold alternating performance of decorative strips of new energy vehicles, comprising a testing box 1 and an experimental chamber 2 formed inside, wherein a testing platform 3 is provided inside the testing box 1, and a plurality of movable guide grooves 31 are provided on the testing platform 3, and a transmission screw 4 is provided in each of the movable guide grooves 31; At least two sets of mobile clamping mechanisms 5 are sleeved on each of the transmission screws 4, and the two sets of mobile clamping mechanisms 5 are used to clamp the decorative strips to be tested above the testing platform 3; Each group of the mobile clamping mechanisms 5 is provided with a conversion and twisting assembly 6, and the conversion and twisting assembly 6 is used to twist the clamped decorative strip; Specifically, the present invention sets a mobile clamping mechanism 5 and a conversion torsion component 6 on the detection table 3 of the experimental chamber 2, and clamps the two ends of the decorative strips to be tested on the mobile clamping mechanism 5 respectively, and then closes the door of the experimental chamber 2. At this time, the two groups of mobile clamping mechanisms 5 in the mobile guide groove 31 can be controlled to slide away from each other along the transmission screw 4, and the conversion torsion component 6 can drive the decorative strips in the stretched state to be twisted and deformed, or the decorative strips in the non-stretched state to be twisted and deformed, so that the decorative strips in the experimental chamber 2 are in the stretched state, stretched and twisted, or twisted alone for high temperature resistance performance testing, and then the experimental chamber 2 can be used as needed. 2 The temperature is raised to the designated high temperature area, and then the high temperature is kept constant for 3-5 hours, and then the experimental chamber 2 is cooled to the designated low temperature area, and then the low temperature is kept constant for 3-5 hours. By performing such a high and low temperature reciprocating cycle, the cold and hot alternating performance test of the automobile decorative strips in different states can be realized, so as to improve the cold and hot resistance effect of the tested automobile decorative strips in the actual use environment. After the test of multiple decorative strips is completed and the interior of the experimental chamber 2 is in a safe and stable state, the door of the experimental chamber 2 is opened, and the tested decorative strips are removed from the mobile clamping mechanism 5, and the cold and hot alternating performance test of the next group of automobile decorative strips can be carried out.

[0021] In the scheme designed by the present invention, the mobile clamping mechanism 5 includes a mobile block 51, a synchronous belt 52, a pulley 53, a ball nut 54, a bearing 55, a fixed vertical plate 56, a support tube 57 and a clamping claw cylinder 58. A through hole 511 is formed on the mobile block 51, and a transmission hole 512 is formed upward at the center of the through hole 511. A synchronous belt 52 is provided at the bottom of the transmission hole 512 so as to rotate upward, and the synchronous belt 52 extends upward to the top of the mobile block 51. The ball nut 54 is inserted into the through hole 511, and the pulley 53 fixed on the ball nut 54 is connected to the through hole 511. The synchronous belt 52 in the transmission hole 512 is meshed for transmission. The ball nut 54 is connected to the moving block 51 through a bearing 55. A fixed vertical plate 56 is fixedly provided on the upper end side of the moving block 51. A support tube 57 is rotatably mounted on the fixed vertical plate 56 through the bearing 55. A pulley 53 meshing with the synchronous belt 52 is also sleeved on the support tube 57. A conversion torsion component 6 is provided on the moving block 51. A clamping claw cylinder 58 is installed at the end of the conversion torsion component 6. The ball nut 54 is sleeved on the transmission screw 4. The moving block 51 is located in the moving guide groove 31. Specifically, when it is necessary to put the decorative strip to be tested into the experimental chamber 2 for performance testing, the conversion and torsion assembly 6 on the moving block 51 is controlled to work, so that it is connected to the synchronous belt 52 through the pulley 53 on the support tube 57 and the pulley 53 on the ball nut 54, so that the ball nut 54 can slide horizontally left and right along the transmission screw 4 in a rotating state, and then the moving block 51 will also slide horizontally in the moving guide groove 31, and then the two clamping cylinders 58 on the same horizontal line will slide close to each other to the same distance as the length of the decorative strip to be tested, and then the decorative strip will be placed in the clamping claws of the clamping cylinder 58 for clamping and fixing, and the conversion and torsion assembly 6 will work again, so that through the cooperation of the synchronous belt 52 and the pulley 53, the ball nut 54 can slide and rotate linearly on the transmission screw 4, and because the ball nut 54 is rotationally connected to the moving block 51 through the bearing 55, the moving block 51 will drive the clamped decorative strips to slide away from each other through the fixed vertical plate 56 and the support tube 57, so that The decorative strip clamped is stretched and deformed to achieve the hot and cold alternating performance test of the decorative strip in the stretched state, and the conversion and torsion component 6 on the moving block 51 can torsionally deform the decorative strip clamped by the clamping claw cylinder 58, so that the decorative strip can be torsionally deformed in the stretched or non-stretched state, thereby further achieving the effect of the decorative strip being tested for hot and cold alternating performance in different states. Since the pulley 53 on the ball nut 54 is meshed and driven with the synchronous belt 52 embedded in the transmission hole 512, and the ball nut 54 is rotatably mounted on the moving block 51, the moving block 51 can be stably and horizontally slid along the moving guide groove 31 without interfering with the conversion and torsion component 6 driving the ball nut 54 to rotate through the synchronous belt 52 and the pulley 53. At the same time, the decorative strip in the stretched or non-stretched state can be torsionally deformed without slipping of the moving block 51, thereby achieving the hot and cold alternating performance test of the decorative strip in various states.

[0022] In the solution designed by the present invention, the diameter of one side of the through hole 511 is larger than the diameter of the other side of the through hole, a bearing 55 is fixed in the small diameter hole of the through hole 511, another bearing 55 is fixed on the ball nut 54, and the outer ring of the bearing 55 is rotatably inserted into the large diameter hole of the through hole 511, one end of the ball nut 54 extends out of the through hole 511 and is locked and fixed by a locking nut 59, and the flange nut of the ball nut 54 is fitted to the large diameter hole of the through hole 511; Specifically, the through hole 511 is provided to facilitate the installation of the ball nut 54 into the moving block 51, and the orifices at both ends of the through hole 511 are of different sizes, so that the pulley 53 on the ball nut 54 can be inserted into the through hole 511 through the large diameter orifice and mesh with the synchronous belt 52 in the transmission hole 512, and the outer ring surface of the fixed bearing 55 on the ball nut 54 is rotated and inserted into the large diameter orifice of the through hole 511, thereby facilitating the rapid assembly of the ball nut 54 and the moving block 51, and making the pulley 53 on the ball nut 54 and the synchronous belt 52 accurately and stably meshed and transmitted, so that the ball nut 54 can be rotated to cooperate with the fixed transmission screw 4, so that the moving block 51 can slide safely and stably in the moving guide groove 31, thereby realizing stable and safe tensile deformation of the clamped decorative strip.

[0023] In the scheme designed by the present invention, the conversion and torsion assembly 6 includes a driven bevel gear 61, a U-shaped frame 62, a driving bevel gear 63, a drive shaft 64, a sliding vertical plate 65 and an electric push rod 66. The driven bevel gear 61 is sleeved on the support tube 57, and the driven bevel gear 61 is located on the outer side of the fixed vertical plate 56. The outer side of the fixed vertical plate 56 is provided with a U-shaped frame 62, and a servo motor is fixed in the U-shaped groove of the U-shaped frame 62. The output shaft of the servo motor rotates upward and passes through the U-shaped frame 62 to be provided with a driving bevel gear 63. The driving bevel gear 63 and the driven bevel gear 61 is meshed, a driving shaft 64 is inserted through the support tube 57, and a clamping cylinder 58 is installed at one end of the driving shaft 64, and a driven bevel gear 61 is also installed at the other end thereof, and the driven bevel gear 61 corresponds to the driven bevel gear 61 on the support tube 57, and a sliding vertical plate 65 is provided on the other side wall of the moving block 51, and the sliding vertical plate 65 is connected to the extended driving shaft 64 through a bearing 55, and the sliding vertical plate 65 is connected to the fixed rods of at least two electric push rods 66, and the output rods of the electric push rods 66 are connected to the fixed vertical plate 56; Specifically, when the moving block 51 needs to slide in the moving guide groove 31, the output rod of the electric push rod 66 is controlled to be retracted. At this time, since the fixed vertical plate 56 is fixed on the moving block 51, the fixed rod of the electric push rod 66 will pull the sliding vertical plate 65 to slide in the direction of the fixed vertical plate 56. At this time, the driving shaft 64 will slide in the support tube 57, so that the driven bevel gear 61 at the tail of the driving shaft 64 is disengaged from the meshing with the active bevel gear 63, and then the servo motor in the U-shaped frame 62 is controlled to work, so that it drives the active bevel gear 63 to rotate through the output shaft, and at this time the support The tube 57 drives the pulley 53 and the synchronous belt 52 to rotate through the meshing driven bevel gear 61, and then the rotation of the ball nut 54 drives the moving block 51 to slide in the moving guide groove 31. Since the driving shaft 64 is rotated and slidably inserted into the support tube 57, the rotation of the support tube 57 will not drive the driving shaft 64 to rotate. When the decorative strip is clamped on the two clamping claw cylinders 58, the sliding of the two corresponding moving blocks 51 in the moving guide groove 31 will stretch and deform the clamped decorative strip, thereby facilitating the cold and hot alternating performance test of the stretched decorative strip. When it is necessary to twist and deform the decorative strip in the stretched state, the output rod of the electric push rod 66 is controlled to extend, so that it drives the sliding vertical plate 65 to slide in the direction away from the fixed vertical plate 56, and then the driven bevel gear 61 at the end of the driving shaft 64 will mesh with the active bevel gear 63, and then the rotation of the active bevel gear 63 will drive the two corresponding meshed driven bevel gears 61 to rotate, and then the rotation of the driving shaft 64 will drive the decorative strip clamped by the clamping claw cylinder 58 to twist and deform, and the rotation of the support tube 57 will drive the moving block 51 to slide in the moving guide groove 31, so as to achieve the stretching and twisting deformation of the clamped decorative strip, and then achieve the cold and hot alternating performance test of the decorative strip in the stretched and twisted deformation state, and at the same time, the servo motor in the U-shaped frame 62 can be controlled The intermittent forward and reverse rotation of the output shaft allows the decorative strip to be twisted and deformed in a stretched, tensioned or relaxed state, and then, through the cooperation of the conversion and twisting assembly 6 set on the fixed vertical plate 56, the active bevel gear 63 is engaged with the driven bevel gear 61 on the support tube 57. At this time, the moving block 51 will slide in the moving guide groove 31, and the clamped decorative strip will be stretched or relaxed. When the driven bevel gear 61 on the driving shaft 64 is engaged with the active bevel gear 63, the driving shaft 64 will drive the clamped decorative strip to twist and deform through the clamping claw cylinder 58, and then the clamped decorative strip can be stably and quickly switched between tensile deformation and torsional deformation, thereby further improving the stability and accuracy of the hot and cold alternating performance testing of the decorative strip under different states.

[0024] In the solution designed by the present invention, the fixed vertical plate 56 and the sliding vertical plate 65 are correspondingly fixed with square sliding sleeves 67, and a square sliding rod 68 is slidably inserted in the square sliding sleeve 67, one end of the square sliding rod 68 is fixed to the vertical plate of the U-shaped frame 62, and the other end of the square sliding rod 68 slides out of the sliding vertical plate 65, and a metal suction strip 69 is insulated and installed on the square sliding rod 68, and an electromagnetic suction block is insulated and installed on the inner wall of the square sliding sleeve 67, and the electromagnetic suction block is in sliding contact with the metal suction strip 69; Specifically, when only the active bevel gear 63 is needed to drive the driven bevel gear 61 on the driving shaft 64 to rotate, so that the stretched or non-stretched decorative strip is twisted and deformed, the electromagnetic suction block in the square sliding sleeve 67 on the fixed vertical plate 56 needs to be powered off, so that the metal suction strip 69 is lost and adsorbed and fixed, and the electromagnetic suction block in the square slider on the sliding vertical plate 65 is powered on so that it is adsorbed and fixed to the square sliding rod 68. Then, when the output rod of the electric push rod 66 is retracted, the sliding vertical plate 65 can not only drive the driving shaft 64 to slide horizontally, but also push the U-shaped frame 62 to slide toward the side away from the fixed vertical plate 56 through the adsorbed and fixed square sliding rod 68. Then, the synchronous sliding of the driving shaft 64 and the U-shaped frame 62 will make the driven bevel gear 61 on the driving shaft 64 always in meshing state with the active bevel gear 63, and the driven bevel gear 61 on the support tube 57 will be out of mesh with the active bevel gear 63 after sliding, so that the rotation of the active bevel gear 63 will only drive the driving shaft 64 to slide horizontally. The shaft 64 rotates, and the stretched or non-stretched decorative strips are twisted and deformed separately, preventing the decorative strips from being stretched and deformed synchronously during the twisting deformation, which may easily cause the decorative strips to break during the detection, thereby affecting the stability and accuracy of the performance detection; when the active bevel gear 63 is required to drive the driven bevel gear 61 on the support tube 57 to rotate, so that the moving block 51 slides in the moving guide groove 31, the electromagnetic suction block inside the square sliding sleeve 67 fixed on the fixed vertical plate 56 needs to be energized so that it adsorbs and fixes the square sliding rod 68, and the square sliding sleeve 67 on the sliding vertical plate 65 will be slidably connected with the square sliding rod 68, and then the output rod of the electric push rod 66 will be retracted, and only the driven bevel gear 61 on the driving shaft 64 will be pushed to slide from the active bevel gear 63 through the sliding vertical plate 65 to disengage, and then the rotation of the active bevel gear 63 will only drive the moving block 51 to slide in the moving guide groove 31, so as to achieve the stretching and deformation of the clamped decorative strip.

[0025] In the solution designed by the present invention, a U-shaped slot 651 is opened upward at the bottom of the sliding vertical plate 65, and the slot width of the U-shaped slot 651 is the same as the front-to-back width of the moving block 51. The top of the moving block 51 extends out of the upper surface of the detection platform 3, and the U-shaped slot 651 is slidably sleeved to the top of the moving block 51 extending upward; Specifically, when the sliding vertical plate 65 slides toward the side of the fixed vertical plate 56 under the drive of the output rod recovery of the electric push rod 66, and then when the active bevel gear 63 drives the clamped decorative strip to twist through the driven bevel gear 61 on the drive shaft 64, the U-shaped groove 651 at the bottom of the sliding vertical plate 65 will continuously slide and sleeve on the moving block 51 extending from the top, which will improve the supporting effect of the sliding vertical plate 65 on the rotating drive shaft 64 and prevent the sliding vertical plate from tilting when the decorative strip is twisted alone.

[0026] In the scheme designed by the present invention, the movable block 51 is provided with an elastic buckle assembly 7, and the elastic buckle assembly 7 includes a sac-shaped thin plate 71, a guide tube 72, a sac-shaped column 73, a reset spring 74 and an insert block 75. Sac-shaped thin plates 71 are fixedly provided on both sides of the extended end of the movable block 51, and the sac-shaped thin plates 71 are in compression contact with the U-shaped card slot 651. The sac-shaped thin plates 71 are connected with the guide tube 72. The two side walls of the movable block 51 are provided with deep holes, and sac-shaped columns 73 are arranged in the deep holes. The sac-shaped columns 73 are provided with a reset spring 74, and the sac-shaped columns 73 are connected with the guide tube 72. The outer end of the sac-shaped column 73 is fixedly provided with an insert block 75. The two side walls of the movable guide groove 31 are provided with a plurality of plug holes 32, and the plug holes 32 correspond to the plug blocks 75. Specifically, when the output rod of the electric push rod 66 is retracted, the driven bevel gear 61 on the drive shaft 64 is disengaged from the active bevel gear 63. At this time, the U-shaped slot 651 provided at the bottom of the sliding vertical plate 65 is not sleeved on the extended moving block 51. When the sliding vertical plate 65 drives the U-shaped frame 62 to slide synchronously, the U-shaped slot 651 will slide and sleeve on the moving block 51. At this time, the sliding vertical plate 65 will squeeze the sac-shaped thin plate 71, so that the gas in the sac-shaped thin plate 71 will enter the sac-shaped column 73 through the guide tube 72, so that the sac-shaped column 73 will stretch in the deep hole, and the internal return spring 74 will be stretched. Therefore, the expansion of the sac-shaped column 73 will push the plug 75 to slide and insert into the corresponding socket 32, so that the moving block 51 can be limited and fixed to The movable guide groove 31 prevents the active bevel gear 63 from meshing with the driven bevel gear 61 on the drive shaft 64 alone, so that when the clamped decorative strip is twisted and deformed, the torsional force of the decorative strip will pull the movable block 51 to slide freely in the movable guide groove 31, thereby affecting the stability of the decorative strip to twist and deform alone. When the movable block 51 needs to slide, the output rod of the electric push rod 66 extends out, so that the sliding vertical plate 65 slides in the direction away from the fixed vertical plate 56. At this time, the capsule-shaped thin plate 71 is no longer subjected to the extrusion force, and the elastic restoring force of the reset spring 74 will pull the capsule-shaped column 73 to contract, and the plug block 75 will be disengaged from the socket 32, so that the movable block 51 can slide freely in the movable guide groove 31, thereby realizing the stretching movement of the clamped decorative strip.

[0027] The present invention also provides a method for detecting the hot-cold alternating performance of a new energy vehicle decorative strip, which is applicable to the above-mentioned device for detecting the hot-cold alternating performance of a new energy vehicle decorative strip, and comprises the following steps: S1: Sample preparation: According to the specific test requirements, select 3 decorative strip test samples with a specification of 30mm*100mm, clamp the 3 test samples to each set of symmetrical mobile clamping mechanisms 5 in sequence, and then close the door of the test chamber 2; S2: Test parameter setting: set the following cycle for test chamber 2: 25℃~28℃ to 78℃~82℃, 80%RH, heating time 45~65 minutes, storage at 80%RH, 78℃~82℃ for 3h~5h; cooling to -35℃~-42℃, cooling time 65~100 minutes, storage at -35℃~-42℃ for 3h~5h; perform 6~9 cycles in total; S3: Temperature monitoring: During the test, the temperature of the sample is monitored and recorded in real time using temperature sensors and data logging equipment; S4: Test result analysis: Based on the temperature data obtained after the test, analyze the stress and strain of the test samples at different temperatures to evaluate the hot and cold cycling resistance of the decorative strips.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for testing the hot-cold alternating performance of a decorative strip of a new energy vehicle, comprising a testing box (1) and a test chamber (2) formed inside, characterized in that: A testing platform (3) is provided in the testing box (1), and a plurality of movable guide grooves (31) are provided on the testing platform (3), and a transmission screw (4) is provided in each movable guide groove (31); At least two sets of movable clamping mechanisms (5) are sleeved on each of the transmission screws (4), and the two sets of movable clamping mechanisms (5) are used to clamp the decorative strip to be tested above the testing platform (3); Each group of the mobile clamping mechanisms (5) is provided with a conversion and twisting assembly (6), and the conversion and twisting assembly (6) is used to twist the clamped decorative strip.

2. A device for detecting the hot-cold alternating performance of a new energy vehicle decorative strip according to claim 1, characterized in that: The mobile clamping mechanism (5) comprises a mobile block (51), a synchronous belt (52), a pulley (53), a ball nut (54), a bearing (55), a fixed vertical plate (56), a support tube (57) and a clamping claw cylinder (58); a through hole (511) is formed through the mobile block (51), and a transmission hole (512) is formed upward at the center of the through hole (511); a synchronous belt (52) is provided at the bottom of the transmission hole (512) so as to rotate upward, and the synchronous belt (52) extends upward to above the mobile block (51); the ball nut (54) is inserted into the through hole (511), and the pulley (53) fixed on the ball nut (54) is connected to the transmission hole (512); The movable block (51) is connected to the movable block (51) by a synchronous belt (52) in the movable block (51) through a bearing (55). A fixed vertical plate (56) is fixedly provided on the upper side of the movable block (51). A support tube (57) is rotatably mounted on the fixed vertical plate (56) through a bearing (55). A pulley (53) meshing with the synchronous belt (52) is also sleeved on the support tube (57). A conversion torsion component (6) is provided on the movable block (51). A clamping claw cylinder (58) is installed at the end of the conversion torsion component (6). The ball nut (54) is sleeved on the transmission screw (4). The movable block (51) is located in the movable guide groove (31).

3. A device for detecting the hot-cold alternating performance of a new energy vehicle decorative strip according to claim 2, characterized in that: The diameter of the hole opening on one side of the through hole (511) is larger than the diameter of the hole opening on the other side thereof; a bearing (55) is fixedly disposed in the hole opening with a smaller diameter of the through hole (511); another bearing (55) is fixedly disposed on the ball nut (54); and the outer ring of the bearing (55) is rotatably inserted into the hole opening with a larger diameter of the through hole (511); one end of the ball nut (54) extends out of the through hole (511) and is locked and fixed by a locking nut (59); and the flange nut of the ball nut (54) fits into the hole opening with a larger diameter of the through hole (511).

4. The device for detecting the hot-cold alternating performance of a new energy vehicle decorative strip according to claim 2, characterized in that: The conversion and torsion assembly (6) comprises a driven bevel gear (61), a U-shaped frame (62), a driving bevel gear (63), a drive shaft (64), a sliding vertical plate (65) and an electric push rod (66); the driven bevel gear (61) is sleeved on the support tube (57), and the driven bevel gear (61) is located on the outer side of the fixed vertical plate (56); the outer side of the fixed vertical plate (56) is provided with a U-shaped frame (62), and a servo motor is fixedly provided in a U-shaped groove of the U-shaped frame (62); the output shaft of the servo motor rotates upward and passes through the U-shaped frame (62) to be provided with a driving bevel gear (63), and the driving bevel gear (63) is meshed with the driven bevel gear (61). A driving shaft (64) is inserted through the support tube (57), and a clamping cylinder (58) is installed on one end of the driving shaft (64), and a driven bevel gear (61) is also installed on the other end thereof, and the driven bevel gear (61) corresponds to the driven bevel gear (61) on the support tube (57). A sliding vertical plate (65) is provided on the other side wall of the moving block (51), and the sliding vertical plate (65) is connected to the extended driving shaft (64) through a bearing (55). The sliding vertical plate (65) is connected to the fixed rods of at least two electric push rods (66), and the output rods of the electric push rods (66) are connected to the fixed vertical plate (56).

5. The device for detecting the hot-cold alternating performance of the decorative strip of a new energy vehicle according to claim 4, characterized in that: The fixed vertical plate (56) and the sliding vertical plate (65) are correspondingly fixedly provided with square sliding sleeves (67), and a square sliding rod (68) is slidably inserted in the square sliding sleeve (67), one end of the square sliding rod (68) is fixedly provided on the vertical plate of the U-shaped frame (62), and the other end of the square sliding rod (68) slides out of the sliding vertical plate (65), a metal suction strip (69) is insulated and installed on the square sliding rod (68), and an electromagnetic suction block is insulated and installed on the inner wall of the square sliding sleeve (67), and the electromagnetic suction block is in sliding contact with the metal suction strip (69).

6. The device for detecting the hot-cold alternating performance of the decorative strip of a new energy vehicle according to claim 4, characterized in that: A U-shaped slot (651) is provided at the bottom of the sliding vertical plate (65) extending upward, and the slot width of the U-shaped slot (651) is the same as the front-to-rear width of the moving block (51); the top of the moving block (51) extends out of the upper surface of the detection platform (3); and the U-shaped slot (651) is slidably sleeved on the top of the moving block (51) extending upward.

7. A device for testing the hot-cold alternating performance of a new energy vehicle decorative strip according to claim 6, characterized in that: The movable block (51) is provided with an elastic buckling assembly (7), the elastic buckling assembly (7) comprising a sac-shaped thin plate (71), a guide tube (72), a sac-shaped column (73), a return spring (74) and an insert block (75). Sac-shaped thin plates (71) are fixedly provided on both sides of the extended end of the movable block (51), the sac-shaped thin plates (71) are in compression contact with the U-shaped slot (651), the sac-shaped thin plates (71) are connected to the guide tube (72), the two side walls of the movable block (51) are provided with deep holes, and sac-shaped columns (73) are arranged in the deep holes, the sac-shaped columns (73) are provided with a return spring (74), and the sac-shaped columns (73) are connected to the guide tube (72), the outer end of the sac-shaped column (73) is fixedly provided with an insert block (75), and the two side walls of the movable guide slot (31) are provided with a plurality of insertion holes (32), and the insertion holes (32) correspond to the insertion blocks (75).

8. A method for testing the hot-cold-hot cycling performance of a new energy vehicle decorative strip, the method being applicable to a device for testing the hot-cold-hot cycling performance of a new energy vehicle decorative strip as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1: Sample preparation: According to the specific test requirements, select three decorative strip test samples with a specification of 30 mm*100 mm, clamp the three test samples to each set of symmetrical mobile clamping mechanisms (5) in turn, and then close the door of the test chamber (2); S2: Test parameter setting: Set the test chamber (2) to the following cycle: heating from 25°C to 28°C to 78°C to 82°C, 80% RH, heating time 45 to 65 minutes, storing at 80% RH, 78°C to 82°C for 3 hours to 5 hours; cooling to -35°C to -42°C, cooling time 65 to 100 minutes, storing at -35°C to -42°C for 3 hours to 5 hours; perform 6 to 9 cycles in total; S3: Temperature monitoring: During the test, the temperature of the sample is monitored and recorded in real time using temperature sensors and data logging equipment; S4: Test result analysis: Based on the temperature data obtained after the test, analyze the stress and strain of the test samples at different temperatures to evaluate the hot and cold cycling resistance of the decorative strips.

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