A device and method for detecting the cold and heat alternating performance of a decorative strip for new energy vehicles

Abstract

The present invention belongs to the technical field of automotive parts detection, and particularly relates to a device and method for detecting the cold and heat alternating performance of decorative strips for new energy vehicles. It includes a detection box and an experimental chamber formed inside. A detection table is provided in the detection box, and a plurality of moving guide grooves are opened on the detection table. A transmission lead screw is arranged in each of the moving guide grooves; at least two groups of moving clamping mechanisms are sleeved on each of the transmission lead screws, and the two groups of moving clamping mechanisms are used to clamp the decorative strip to be detected above the detection table; a conversion and torsion assembly is arranged on each group of moving clamping mechanisms, and the conversion and torsion assembly is used to twist the clamped decorative strip; the present invention enables the decorative strip to be torsionally deformed in a stretched or non-stretched state, and further realizes the effect of detecting the cold and heat alternating performance of the decorative strip in different states.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive parts inspection, and particularly relates to a device and method for detecting the resistance of decorative strips of new energy vehicles to thermal cycling and cold cycling. Background Art

[0002] Automotive decorative strips are an important part of automotive interior components. Decorative strips are decorative accessories with decorative effects. The quality inspection of automotive decorative strips is very strict. When producing automotive decorative strips, various performance inspections need to be carried out on them, such as thermal aging performance, resistance to thermal cycling and cold cycling, and so on.

[0003] Although existing thermal cycling and cold cycling detection devices can detect the resistance of automotive decorative panels or decorative strips to thermal cycling and cold cycling, in the actual use process of automotive decorative strips, they need to be subjected to different degrees of stretching, extrusion, or torsional deformation. However, existing thermal cycling and cold cycling detection devices can only detect the resistance of decorative strips to thermal cycling and cold cycling in a static environment. Therefore, it is impossible to detect the resistance of decorative strips to thermal cycling and cold cycling in different states according to the required degree of deformation of automotive decorative strips in the real environment, which will affect the accuracy and efficiency of the resistance to thermal cycling and cold cycling detection device for detecting the resistance of automotive decorative strips to thermal cycling and cold cycling in different states. Summary of the Invention

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0005] The present invention provides a device for detecting the resistance of decorative strips of new energy vehicles to thermal cycling and cold cycling, including a detection box and an experimental chamber formed inside. A detection table is provided in the detection box, and a plurality of moving guide grooves are opened on the detection table. A transmission lead screw is provided in each moving guide groove.

[0006] At least two groups of moving clamping mechanisms are sleeved on each transmission lead screw. The two groups of moving clamping mechanisms are used to clamp the decorative strip to be detected above the detection table.

[0007] A conversion and torsion assembly is provided on each group of moving clamping mechanisms. The conversion and torsion assembly is used to twist the clamped decorative strip.

[0008] Furthermore, the movable clamping mechanism includes a movable square block, a synchronous belt, belt pulleys, a ball nut, a bearing, a fixed vertical plate, a support tube, and a jaw cylinder. A through hole is formed through the movable square block, and a transmission hole is formed upward at the center of the through hole. A synchronous belt is rotatably arranged upward at the bottom of the transmission hole, and the synchronous belt extends upward above the movable square block. The ball nut is inserted into the through hole, and the belt pulley fixed on the ball nut is in meshing transmission with the synchronous belt in the transmission hole. The ball nut is connected to the movable square block through a bearing. A fixed vertical plate is fixedly arranged on the upper side surface of the movable square block. A support tube is rotatably installed on the fixed vertical plate through a bearing. A belt pulley meshing with the synchronous belt is also sleeved on the support tube. A conversion and torsion assembly is arranged on the movable square block, and a jaw cylinder is installed at the end of the conversion and torsion assembly. The ball nut is sleeved on the transmission lead screw, and the movable square block is located in the movable guide groove.

[0009] Furthermore, the diameter of one side orifice of the through hole is larger than that of the other side orifice. A bearing is fixedly arranged in the orifice with a smaller diameter of the through hole. Another bearing is fixedly arranged on the ball nut, and the outer ring of this bearing is rotatably inserted into the orifice with a larger diameter of the through hole. One end of the ball nut extends out of the through hole and is fixedly locked by a locking nut, and the flange nut of the ball nut fits against the orifice with a larger diameter of the through hole.

[0010] Furthermore, the conversion and torsion assembly includes a driven bevel gear, a U-shaped frame, a driving bevel gear, a driving shaft, a sliding vertical plate, and an electric push rod. A driven bevel gear is sleeved on the support tube, and this driven bevel gear is located on the outer side surface of the fixed vertical plate. A U-shaped frame is arranged on the outer side surface of the fixed vertical plate, and a servo motor is fixedly arranged in the U-shaped groove of the U-shaped frame. The output shaft of the servo motor rotatably penetrates upward through the U-shaped frame and is provided with a driving bevel gear. The driving bevel gear is meshed with the driven bevel gear. A driving shaft is inserted through the support tube, and a jaw cylinder is installed at one end of the driving shaft, and a driven bevel gear is also installed at the other end of the driving shaft, and this driven bevel gear corresponds to the driven bevel gear on the support tube. Another side wall of the movable square block is provided with a sliding vertical plate, and the sliding vertical plate is connected to the extended driving shaft through a bearing. The sliding vertical plate is connected to the fixed rods of at least two electric push rods, and the output rods of the electric push rods are connected to the fixed vertical plate.

[0011] Furthermore, square sliding sleeves are fixedly arranged corresponding to the fixed vertical plate and the sliding vertical plate, and square sliding rods are slidably inserted into the square sliding sleeves. One end of the square sliding rod is fixedly arranged on the vertical plate of the U-shaped frame, and the other end of the square sliding rod slidably extends out of the outside of the sliding vertical plate. A metal suction strip is installed on the square sliding rod in an insulating manner, and an electromagnetic suction block is installed on the inner wall of the square sliding sleeve in an insulating manner, and the electromagnetic suction block is in sliding contact with the metal suction strip.

[0012] Furthermore, a U-shaped card slot is formed upward at the bottom of the sliding vertical plate, and the width of the slot opening of the U-shaped card slot is the same as the front-back width of the moving square block. The top of the moving square block extends out of the upper surface of the detection table, and the top of the moving square block extending upward is sleeved and slidably connected to the U-shaped card slot.

[0013] Furthermore, an elastic buckling component is provided on the moving square block. The elastic buckling component includes a bladder-shaped thin plate, a diversion tube, a bladder-shaped column, a return spring and an insertion block. Bladder-shaped thin plates are fixedly provided on both sides of the extending end of the moving square block. The bladder-shaped thin plates are in extrusion contact with the U-shaped card slot. A diversion tube is communicated with the bladder-shaped thin plate. Deep holes are formed in both side walls of the moving square block, and bladder-shaped columns are arranged in the deep holes. A return spring is arranged in the bladder-shaped column, and a diversion tube is communicated with the bladder-shaped column. An insertion block is fixedly provided at the outer end of the bladder-shaped column. A plurality of insertion holes are formed in both side walls of the moving guide groove, and the insertion holes correspond to the insertion blocks.

[0014] A method for detecting the cold and heat alternating performance of a decorative strip for a new energy vehicle, which is applicable to the device for detecting the cold and heat alternating performance of a decorative strip for a new energy vehicle as described above, includes the following steps:

[0015] S1: Sample preparation: According to the specific detection requirements, select 3 experimental samples of decorative strips with a specification of 30mm * 100mm, clamp the 3 experimental samples onto the symmetric moving clamping mechanisms in each group in sequence, and then close the door of the experimental chamber.

[0016] S2: Test parameter setting: Set the following cycle for the experimental chamber: heat from 25°C to 28°C to 78°C to 82°C, 80% RH, heating time 45 - 65 minutes, store at 80% RH, 78°C to 82°C for 3h - 5h; cool down to -35°C to -42°C, cooling time 65 - 100 minutes, store at -35°C to -42°C for 3h - 5h; perform 6 - 9 cycles in total.

[0017] S3: Temperature monitoring: During the test, use a temperature sensor and a data recording device to monitor and record the temperature of the sample in real time.

[0018] S4: Analysis of test results: According to the temperature data obtained after the test, analyze the stress and strain conditions of the experimental samples at different temperatures, and evaluate the cold and heat alternating performance of the decorative strip.

[0019] The present invention has the following beneficial effects:

[0020] 1. In the present invention, a plurality of sets of symmetric moving clamping mechanisms are arranged on the detection table. The moving block is sleeved on the transmission lead screw through a ball nut, and the horizontal sliding of the moving block is achieved through the mutual transmission and cooperation of the synchronous belt and the pulley sleeved on the ball nut. Furthermore, the sliding of the symmetric moving blocks can first make the jaw cylinders approach each other to clamp and fix the decorative strip, and then the moving blocks move away from each other, thus facilitating the stretching and deformation of the clamped decorative strip, realizing the detection of the resistance to thermal cycling performance of the decorative strip in the stretched state. The conversion and torsion assembly on the moving block can also twist and deform the decorative strip clamped by the jaw cylinders, enabling the decorative strip to be twisted and deformed in the stretched or non-stretched state, and further realizing the effect of detecting the resistance to thermal cycling performance of the decorative strip in different states.

[0021] 2. In the present invention, the conversion and torsion assembly is installed on the fixed vertical plate. When the output rod of the electric push rod retracts and extends, it can either push the driven bevel gear at the end of the drive shaft to slide out of engagement with the driving bevel gear, at this time, the moving block can slide independently in the moving guide groove to realize the stretching or relaxation drive of the clamped decorative strip, or it can push the driven bevel gear and the driving bevel gear at the end of the drive shaft to slide synchronously. At this time, the drive shaft will drive the clamped decorative strip to twist and deform through the jaw cylinders, thereby realizing the stable and rapid switching of stretching deformation, torsion deformation or stretching and torsion deformation of the clamped decorative strip, and further improving the stability and accuracy of detecting the resistance to thermal cycling performance of the decorative strip in different states.

[0022] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall structure of the disclosed embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of multiple sets of moving clamping mechanisms on the detection table in the disclosed embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the moving clamping mechanism and the conversion and torsion assembly in the disclosed embodiment of the present invention;

[0027] Figure 4 For the disclosed embodiment of the present invention Figure 3Perspective view of the middle jaw cylinder;

[0028] Figure 5 Schematic diagram of the synchronous belt and pulley drive structure of the disclosed embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the structure of the moving block of the disclosed embodiment of the present invention;

[0030] Figure 7 For the disclosed embodiment of the present invention Figure 6 Partial enlarged view at A in the middle.

[0031] In the figure: 1. Detection box;

[0032] 2. Experiment chamber;

[0033] 3. Detection table; 31. Moving guide groove; 32. Jack;

[0034] 4. Transmission lead screw;

[0035] 5. Moving clamping mechanism; 51. Moving 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. Jaw cylinder; 59. Locking nut;

[0036] 6. Conversion and torsion assembly; 61. Driven bevel gear; 62. U-shaped frame; 63. Driving bevel gear; 64. Driving shaft; 65. Sliding vertical plate; 651. U-shaped card slot; 66. Electric push rod; 67. Square sliding sleeve; 68. Square sliding rod; 69. Metal suction bar;

[0037] 7. Elastic buckling assembly; 71. Sac-shaped thin plate; 72. Diversion tube; 73. Sac-shaped column; 74. Return spring; 75. Insert block. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. 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 cannot be construed as a limitation of the present invention.

[0040] Please refer to Figures 1-7 As shown, the present invention is a device for detecting the cold and heat alternating performance of a decorative strip for a new energy vehicle, including a detection box 1 and an experimental chamber 2 formed inside. A detection table 3 is provided in the detection box 1, and a plurality of moving guide grooves 31 are formed on the detection table 3. A transmission lead screw 4 is provided in each of the moving guide grooves 31;

[0041] At least two groups of moving clamping mechanisms 5 are sleeved on each of the transmission lead screws 4. The two groups of moving clamping mechanisms 5 are used to clamp the decorative strip to be detected above the detection table 3;

[0042] A conversion and torsion assembly 6 is provided on each group of moving clamping mechanisms 5. The conversion and torsion assembly 6 is used to twist the clamped decorative strip;

[0043] Specifically, in the present invention, the moving clamping mechanism 5 and the conversion and torsion assembly 6 are arranged on the detection table 3 of the experimental chamber 2. The two end portions of the decorative strip to be detected are respectively clamped on the moving clamping mechanism 5, and then the door of the experimental chamber 2 is closed. At this time, the two moving clamping mechanisms 5 in the moving guide grooves 31 can be first controlled to slide away from each other along the transmission lead screw 4, and the conversion and torsion assembly 6 can drive the stretched decorative strip to undergo torsional deformation, or the decorative strip can be twisted in a non-stretched state, so that the decorative strip located in the experimental chamber 2 is in a stretched state, stretched torsion or single torsion state for high-temperature performance detection. Then, according to the need, the temperature of the experimental chamber 2 is raised to a specified high-temperature region, and then a high-temperature constant is carried out for 3-5 hours. Then, the temperature of the experimental chamber 2 is lowered to a specified low-temperature region, and then a low-temperature constant is carried out for 3-5 hours. By repeating such high and low temperature cycles, the cold and heat alternating performance detection of the automotive decorative strip in different states can be realized, thereby improving the cold and heat resistance effect of the detected automotive decorative strip in the actual use environment. After the detection of multiple decorative strips is completed and the inside of the experimental chamber 2 is in a safe and stable state, the door of the experimental chamber 2 is opened, and the detected decorative strip is removed from the moving clamping mechanism 5, and then the cold and heat alternating performance detection of the next group of automotive decorative strips can be carried out.

[0044] In the solution designed by the present invention, the moving clamping mechanism 5 includes a moving square block 51, a synchronous belt 52, a belt pulley 53, a ball nut 54, a bearing 55, a fixed vertical plate 56, a support tube 57 and a jaw cylinder 58. A through hole 511 is formed through the moving square block 51, and a transmission hole 512 is formed upward at the center of the through hole 511. The synchronous belt 52 is rotatably arranged upward at the bottom of the transmission hole 512, and the synchronous belt 52 extends upward above the moving square block 51. The ball nut 54 is inserted into the through hole 511, and the belt pulley 53 fixed on the ball nut 54 is meshed with the synchronous belt 52 in the transmission hole 512 for driving. The ball nut 54 is connected to the moving square block 51 through a bearing 55. A fixed vertical plate 56 is fixedly arranged on the upper end side of the moving square block 51. A support tube 57 is rotatably installed on the fixed vertical plate 56 through a bearing 55. A belt pulley 53 meshed with the synchronous belt 52 is also sleeved on the support tube 57. A conversion and torsion assembly 6 is arranged on the moving square block 51, and a jaw cylinder 58 is installed at the end of the conversion and torsion assembly 6. The ball nut 54 is sleeved on the transmission lead screw 4, and the moving square block 51 is located in the moving guide groove 31;

[0045] Specifically, when the decorative strip to be detected needs to be placed into the experimental chamber 2 for performance detection, at this time, the conversion and torsion assembly 6 on the moving block 51 is controlled to work. Through the transmission connection between the pulley 53 on the support pipe 57 and the pulley 53 on the ball nut 54 and the synchronous belt 52, the ball nut 54 can horizontally slide left and right along the transmission lead screw 4 in a rotating state. Furthermore, the moving block 51 will also horizontally slide in the moving guide groove 31. Then, the two jaw cylinders 58 on the same horizontal line will approach each other and slide to a distance equal to the length of the decorative strip to be detected. Then, the decorative strip is placed on the jaws of the jaw cylinder 58 for clamping and fixing. Then, the conversion and torsion assembly 6 works again. Through the cooperation of the synchronous belt 52 and the pulley 53, the ball nut 54 linearly slides and rotates on the transmission lead screw 4. Since 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 strip to slide away from each other through the fixed vertical plate 56 and the support pipe 57, thus facilitating the stretching deformation of the clamped decorative strip and realizing the detection of the cold and heat alternating performance of the decorative strip in the stretched state. Moreover, the conversion and torsion assembly 6 on the moving block 51 can also perform torsional deformation on the decorative strip clamped by the jaw cylinder 58, enabling the decorative strip to undergo torsional deformation in the stretched or non-stretched state, and further realizing the effect of detecting the cold and heat alternating performance of the decorative strip 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 installed on the moving block 51, on the premise of not interfering with the conversion and torsion assembly 6 driving the ball nut 54 to rotate through the synchronous belt 52 and the pulley 53, the moving block 51 can stably slide horizontally along the moving guide groove 31. At the same time, on the premise that the moving block 51 does not slide, the torsional deformation treatment of the decorative strip in the stretched or non-stretched state can be realized, thereby enabling the detection of the cold and heat alternating performance of the decorative strip in multiple states.

[0046] In the solution designed by the present invention, the diameter of one side orifice of the through hole 511 is larger than the diameter of the other side orifice. A bearing 55 is fixedly installed in the orifice with a smaller diameter of the through hole 511. Another bearing 55 is fixedly installed on the ball nut 54, and the outer ring of this bearing 55 is rotatably inserted into the orifice 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 abuts against the orifice with a larger diameter of the through hole 511;

[0047] Specifically, the opening of the through hole 511 facilitates the installation of the ball nut 54 into the moving block 51. The orifice sizes at both ends of the through hole 511 are different, enabling the belt pulley 53 on the ball nut 54 to be inserted into the through hole 511 through the larger-diameter orifice and engage with the synchronous belt 52 in the transmission hole 512. The outer circumferential surface of the fixedly installed bearing 55 on the ball nut 54 is rotatably inserted into the larger-diameter orifice of the through hole 511, thereby facilitating the rapid assembly of the ball nut 54 and the moving block 51. Moreover, it enables the belt pulley 53 on the ball nut 54 to accurately and stably engage and drive with the synchronous belt 52. Consequently, the cooperation between the rotatable ball nut 54 and the fixed transmission lead screw 4 allows the moving block 51 to slide safely and stably within the moving guide groove 31, achieving stable and safe stretching deformation of the clamped decorative strip.

[0048] In the solution 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. A driven bevel gear 61 is sleeved on the support tube 57, and this driven bevel gear 61 is located on the outer side surface of the fixed vertical plate 56. A U-shaped frame 62 is provided on the outer side surface of the fixed vertical plate 56, and a servo motor is fixedly installed within the U-shaped groove of the U-shaped frame 62. The output shaft of the servo motor rotatably passes upward through the U-shaped frame 62 and is provided with a driving bevel gear 63. The driving bevel gear 63 meshes with the driven bevel gear 61. A drive shaft 64 is inserted through the support tube 57, and a jaw cylinder 58 is installed at one end of the drive shaft 64, and a driven bevel gear 61 is also installed at the other end of the drive shaft 64, and this driven bevel gear 61 corresponds to the driven bevel gear 61 on the support tube 57. Another side wall of the moving block 51 is provided with a sliding vertical plate 65, and the sliding vertical plate 65 is connected to the extended drive 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;

[0049] Specifically, when it is necessary to move the moving block 51 to slide within the moving guide groove 31, at this time, the output rod of the electric push rod 66 is controlled to retract. At this time, since the fixed vertical plate 56 is fixed on the moving block 51, the fixed rod body of the electric push rod 66 will pull the sliding vertical plate 65 to slide towards the fixed vertical plate 56. At this time, the drive shaft 64 will slide within the support tube 57, causing the driven bevel gear 61 at the tail of the drive shaft 64 to disengage from the meshing with the driving bevel gear 63. Then, the servo motor within the U-shaped frame 62 is controlled to operate, and it drives the driving bevel gear 63 to rotate through the output shaft. At this time, the support tube 57 will drive the belt pulley 53 and the synchronous belt 52 to rotate through the engaged driven bevel gear 61. Furthermore, the rotation of the ball nut 54 will drive the moving block 51 to slide within the moving guide groove 31. Since the drive shaft 64 rotates and slides into the support tube 57, the rotation of the support tube 57 will not drive the drive shaft 64 to rotate. When the decorative strip is clamped onto the two jaw cylinders 58, the sliding of the corresponding two moving blocks 51 within the moving guide groove 31 will stretch and deform the clamped decorative strip, thereby facilitating the detection of the cold and heat alternating performance of the stretched decorative strip;

[0050] When it is necessary to twist and deform the decorative strip in the stretched state, at this time, the output rod of the electric push rod 66 is controlled to extend, driving the sliding vertical plate 65 to slide away from the fixed vertical plate 56. Then, the driven bevel gear 61 at the end of the drive shaft 64 will engage with the driving bevel gear 63. Furthermore, the rotation of the driving bevel gear 63 will drive the rotation of the two engaged driven bevel gears 61. Then, the rotation of the drive shaft 64 will drive the decorative strip clamped by the jaw cylinder 58 to twist and deform. The rotation of the support tube 57 will drive the moving block 51 to slide within the moving guide groove 31, thereby realizing the stretching and twisting deformation of the clamped decorative strip, and further realizing the detection of the cold and heat alternating performance of the decorative strip in the stretched and twisted states. At the same time, the output shaft of the servo motor within the U-shaped frame 62 can be controlled to intermittently rotate forward and backward, enabling the decorative strip to twist and deform in the stretched and tensioned or relaxed states. Then, through the cooperation of the conversion and torsion assembly 6 provided on the fixed vertical plate 56, when the driving bevel gear 63 engages with the driven bevel gear 61 on the support tube 57, at this time, the moving block 51 will slide within the moving guide groove 31, realizing the stretching or relaxation drive of the clamped decorative strip. When the driven bevel gear 61 on the drive shaft 64 engages with the driving bevel gear 63, at this time, the drive shaft 64 will drive the clamped decorative strip to twist and deform through the jaw cylinder 58, thereby being able to realize the stable and rapid switching between the stretching deformation and the twisting deformation of the clamped decorative strip, and further improving the stability and accuracy of the detection of the cold and heat alternating performance of the decorative strip in different states.

[0051] In the solution designed by the present invention, square sliding sleeves 67 are fixedly arranged corresponding to the fixed vertical plate 56 and the sliding vertical plate 65, and a square sliding rod 68 is slidably inserted into the square sliding sleeves 67. One end of the square sliding rod 68 is fixedly arranged 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 insulatedly installed on the square sliding rod 68, and an electromagnetic suction block is insulatedly 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;

[0052] Specifically, when only the driving bevel gear 63 needs to drive the driven bevel gear 61 on the drive shaft 64 to rotate, so that the stretched or non-stretched decorative strip is torsionally deformed, at this time, the electromagnetic suction block in the square sliding sleeve 67 on the fixed vertical plate 56 is powered off, losing the adsorption and fixation of the metal suction strip 69, 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 retracts, at this time, the sliding vertical plate 65 can not only drive the drive shaft 64 to horizontally slide, but also push the U-shaped frame 62 to slide towards the side away from the fixed vertical plate 56 through the adsorbed and fixed square sliding rod 68. Then, the synchronous sliding of the drive shaft 64 and the U-shaped frame 62 will keep the driven bevel gear 61 on the drive shaft 64 always in meshing with the driving bevel gear 63, while the driven bevel gear 61 on the support tube 57 will be disengaged from the driving bevel gear 63 after sliding. Then, the rotation of the driving bevel gear 63 will only drive the drive shaft 64 to rotate, and then the stretched or non-stretched decorative strip will be torsionally deformed alone, preventing the decorative strip from being stretched and deformed synchronously when it is torsionally deformed, which is likely to cause the decorative strip to break during detection, thus affecting the stability and accuracy of its performance detection; when the driving bevel gear 63 needs to drive the driven bevel gear 61 on the support tube 57 to rotate, so that the moving square block 51 slides in the moving guide groove 31, at this time, the electromagnetic suction block inside the square sliding sleeve 67 fixedly arranged on the fixed vertical plate 56 is powered on, 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. Then, when the output rod of the electric push rod 66 retracts, it will only push the driven bevel gear 61 on the drive shaft 64 to slide and disengage from the driving bevel gear 63 through the sliding vertical plate 65. Then, the rotation of the driving bevel gear 63 will only drive the moving square block 51 to slide in the moving guide groove 31, realizing the stretching deformation of the clamped decorative strip.

[0053] In the solution designed by the present invention, a U-shaped card slot 651 is opened upwards at the bottom of the sliding vertical plate 65, and the width of the slot opening of the U-shaped card slot 651 is the same as the front and rear width of the moving square block 51. The top of the moving square block 51 extends out of the upper surface of the detection table 3, and the top of the moving square block 51 extending upwards is slidably sleeved in the U-shaped card slot 651;

[0054] Specifically, when the sliding vertical plate 65 slides towards the side of the fixed vertical plate 56 driven by the retraction of the output rod of the electric push rod 66, and then when the driving bevel gear 63 drives the clamped decorative strip to twist through the driven bevel gear 61 on the driving shaft 64, at this time, the U-shaped card slot 651 at the bottom of the sliding vertical plate 65 will continuously slide and sleeve onto the moving square block 51 protruding from the top, which will improve the supporting effect of the sliding vertical plate 65 on the rotating driving shaft 64 and prevent the sliding vertical plate from tilting when the decorative strip twists alone.

[0055] In the design scheme of the present invention, an elastic fastening component 7 is provided on the moving square block 51. The elastic fastening component 7 includes a bladder-shaped thin plate 71, a diversion tube 72, a bladder-shaped column 73, a return spring 74, and an insertion block 75. Bladder-shaped thin plates 71 are fixedly provided on both sides of the protruding end of the moving square block 51. The bladder-shaped thin plate 71 is in extrusion contact with the U-shaped card slot 651. A diversion tube 72 is communicated with the bladder-shaped thin plate 71. Deep holes are formed in both side walls of the moving square block 51, and bladder-shaped columns 73 are arranged in the deep holes. A return spring 74 is arranged in the bladder-shaped column 73, and a diversion tube 72 is communicated with the bladder-shaped column 73. An insertion block 75 is fixedly provided at the outer end of the bladder-shaped column 73. A plurality of insertion holes 32 are formed in both side walls of the moving guide groove 31, and the insertion holes 32 correspond to the insertion blocks 75.

[0056] Specifically, when the output rod of the electric push rod 66 retracts, so that the driven bevel gear 61 on the driving shaft 64 disengages from the driving bevel gear 63, at this time, the U-shaped card slot 651 formed at the bottom of the sliding vertical plate 65 is not sleeved on the protruding moving square block 51. When the sliding vertical plate 65 drives the U-shaped frame 62 to slide synchronously, at this time, the U-shaped card slot 651 will slide and sleeve onto the moving square block 51. At this time, the sliding vertical plate 65 will squeeze the bladder-shaped thin plate 71, so that the gas in the bladder-shaped thin plate 71 will enter the bladder-shaped column 73 through the diversion tube 72, causing the bladder-shaped column 73 to expand in the deep hole, and the internal return spring 74 will be stretched. Therefore, the expansion of the bladder-shaped column 73 will push the insertion block 75 to slide and insert into the corresponding insertion hole 32, which can realize the limit fixation of the moving square block 51 in the moving guide groove 31, and prevent the driving bevel gear 63 from engaging with the driven bevel gear 61 on the driving shaft 64 alone, so that when the clamped decorative strip is twisted and deformed, the twisting force of the decorative strip will pull the moving square block 51 to freely slide in the moving guide groove 31, which will affect the stability of the decorative strip twisting and deforming alone. When the moving square block 51 needs to slide, at this time, the output rod of the electric push rod 66 extends, causing the sliding vertical plate 65 to slide away from the fixed vertical plate 56. At this time, the bladder-shaped thin plate 71 is no longer subjected to the extrusion force, and the elastic restoring force of the return spring 74 will pull the bladder-shaped column 73 to contract, and the insertion block 75 will disengage from the insertion hole 32, so that the moving square block 51 can freely slide in the moving guide groove 31 to realize the stretching movement of the clamped decorative strip.

[0057] The present invention also provides a method for detecting the performance of new energy vehicle decorative strips under alternating hot and cold conditions. This method is applicable to the device for detecting the performance of new energy vehicle decorative strips under alternating hot and cold conditions described above, and includes the following steps:

[0058] S1: Sample preparation: According to the specific detection requirements, select 3 experimental samples of decorative strips with a specification of 30mm * 100mm, clamp the 3 experimental samples onto the symmetric moving clamping mechanisms 5 in each group in sequence, and then close the door of the experimental chamber 2.

[0059] S2: Test parameter setting: Set the following cycle for the experimental chamber 2: heat from 25°C to 28°C to 78°C to 82°C, 80% RH, heating time 45 - 65 minutes, store at 80% RH, 78°C to 82°C for 3h - 5h; cool down to -35°C to -42°C, cooling time 65 - 100 minutes, store at -35°C to -42°C for 3h - 5h; perform 6 - 9 cycles in total.

[0060] S3: Temperature monitoring: During the test, use a temperature sensor and a data recording device to monitor and record the temperature of the sample in real time.

[0061] S4: Analysis of test results: According to the temperature data obtained after the test, analyze the stress and strain conditions of the experimental samples at different temperatures, and evaluate the performance of the decorative strips under alternating hot and cold conditions.

[0062] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0063] 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 embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. The present 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 in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A device for detecting the performance of a decorative strip of a new energy vehicle under alternating hot and cold conditions, comprising a detection box (1) and an experimental chamber (2) formed inside thereof, characterized in that: A detection table (3) is provided inside the detection box (1), and a plurality of moving guide grooves (31) are formed on the detection table (3), and a transmission lead screw (4) is arranged in each of the moving guide grooves (31); At least two groups of moving clamping mechanisms (5) are sleeved on each transmission lead screw (4), and the two groups of moving clamping mechanisms (5) are used to clamp the decorative strip to be detected above the detection table (3); A conversion torsion assembly (6) is arranged on each group of moving clamping mechanisms (5), and the conversion torsion assembly (6) is used to twist the clamped decorative strip; The moving clamping mechanism (5) includes a moving square block (51), a sliding vertical plate (65) is arranged on the side wall of the moving square block (51), a U-shaped card slot (651) is opened upward at the bottom of the sliding vertical plate (65), and the width of the slot opening of the U-shaped card slot (651) is the same as the front-back width of the moving square block (51). The top of the moving square block (51) extends out of the upper surface of the detection table (3), and the top of the moving square block (51) extending upward is slidably sleeved in the U-shaped card slot (651); An elastic buckling assembly (7) is arranged on the moving square block (51). The elastic buckling assembly (7) includes a bladder-shaped thin plate (71), a diversion tube (72), a bladder-shaped column (73), a return spring (74) and an insertion block (75). Bladder-shaped thin plates (71) are fixedly arranged on both sides of the extending end of the moving square block (51), the bladder-shaped thin plates (71) are in extrusion contact with the U-shaped card slot (651), a diversion tube (72) is communicated with the bladder-shaped thin plate (71), deep holes are opened on both side walls of the moving square block (51), and bladder-shaped columns (73) are arranged in the deep holes. A return spring (74) is arranged in the bladder-shaped column (73), and a diversion tube (72) is communicated with the bladder-shaped column (73). An insertion block (75) is fixedly arranged at the outer end of the bladder-shaped column (73), and a plurality of insertion holes (32) are opened on both side walls of the moving guide groove (31), and the insertion holes (32) correspond to the insertion blocks (75).

2. The detection device for the cold and heat alternating performance of the decorative strip of a new energy vehicle according to claim 1, wherein: The moving clamping mechanism (5) further includes a synchronous belt (52), a belt pulley (53), a ball nut (54), a bearing (55), a fixed vertical plate (56), a support tube (57), and a jaw cylinder (58). A through hole (511) is formed through the moving square block (51), and a transmission hole (512) is formed upward at the center of the through hole (511). The synchronous belt (52) is rotatably arranged upward at the bottom of the transmission hole (512), and the synchronous belt (52) extends upward above the moving square block (51). The ball nut (54) is inserted into the through hole (511), and the belt pulley (53) fixed on the ball nut (54) is meshed with the synchronous belt (52) in the transmission hole (512) for transmission. The ball nut (54) is connected to the moving square block (51) through a bearing (55). A fixed vertical plate (56) is fixedly arranged on the upper end side of the moving square block (51). A support tube (57) is rotatably installed on the fixed vertical plate (56) through a bearing (55). A belt pulley (53) meshed with the synchronous belt (52) is also sleeved on the support tube (57). A conversion and torsion assembly (6) is arranged on the moving square block (51), and a jaw cylinder (58) is installed at the end of the conversion and torsion assembly (6). The ball nut (54) is sleeved on the transmission lead screw (4), and the moving square block (51) is located in the moving guide groove (31).

3. The detection device for the cold and heat alternating performance of a decorative strip of a new energy vehicle according to claim 2, wherein: The diameter of one side orifice of the through hole (511) is larger than that of the other side orifice. A bearing (55) is fixedly arranged in the orifice with a smaller diameter of the through hole (511). Another bearing (55) is fixedly arranged on the ball nut (54), and the outer ring of this bearing (55) is rotatably inserted into the orifice 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 lock nut (59), and the flange nut of the ball nut (54) abuts against the orifice with a larger diameter of the through hole (511).

4. A device for detecting the cold and heat alternating performance of a decorative strip for a new energy vehicle according to claim 2, characterized in that: The conversion and torsion assembly (6) includes a driven bevel gear (61), a U-shaped frame (62), a driving bevel gear (63), a driving shaft (64), a sliding vertical plate (65) and an electric push rod (66). A 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). A U-shaped frame (62) is provided on the outer side of the fixed vertical plate (56), and a servo motor is fixedly installed in the U-shaped groove of the U-shaped frame (62). The output shaft of the servo motor rotates upward through the U-shaped frame (62) and is provided with a driving bevel gear (63). The driving bevel gear (63) meshes with the driven bevel gear (61). A driving shaft (64) is inserted through the support tube (57). One end of the driving shaft (64) is provided with a jaw cylinder (58), and the other end of the driving shaft (64) is also provided with a driven bevel gear (61), and the driven bevel gear (61) corresponds to the driven bevel gear (61) on the support tube (57). 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). The output rod of the electric push rod (66) is connected to the fixed vertical plate (56).

5. The detection device for the cold and heat alternating performance of a decorative strip of a new energy vehicle according to claim 4, characterized in that: Square sliding sleeves (67) are fixedly provided on the fixed vertical plate (56) and the sliding vertical plate (65) correspondingly, and a square sliding rod (68) is slidably inserted into 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). The other end of the square sliding rod (68) slides out of the sliding vertical plate (65). A metal suction strip (69) is installed on the square sliding rod (68) in an insulating manner. An electromagnetic suction block is installed on the inner wall of the square sliding sleeve (67) in an insulating manner, and the electromagnetic suction block is in sliding contact with the metal suction strip (69).

6. A method for detecting the cold and heat alternating performance of a decorative strip for a new energy vehicle, which is applicable to the device for detecting the cold and heat alternating performance of a decorative strip for a new energy vehicle described in any one of the above claims 1 to 5, and is characterized in that: It includes the following steps: S1: Sample preparation: According to the specific detection requirements, select 3 experimental samples of decorative strips with a specification of 30mm*100mm. Clamp the 3 experimental samples onto the symmetric moving clamping mechanisms (5) of each group in sequence, and then close the door of the experimental chamber (2). S2: Test parameter setting: Set the following cycle for the experimental chamber (2): heat up from 25°C to 28°C to 78°C to 82°C, 80%RH, heating time 45 - 65 minutes, store at 80%RH, 78°C to 82°C for 3h - 5h; cool down to -35°C to -42°C, cooling time 65 - 100 minutes, store at -35°C to -42°C for 3h - 5h; perform 6 - 9 cycles in total. S3: Temperature monitoring: During the test, use a temperature sensor and a data recording device to monitor and record the temperature of the sample in real time. S4: Test result analysis: According to the temperature data obtained after the test, analyze the stress and strain conditions of the experimental samples at different temperatures, and evaluate the cold and heat alternating resistance performance of the decorative strips.

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