Device for testing opening and closing fatigue durability of net bag on side protective surface of car trunk

Abstract

The utility model discloses an opening and closing fatigue durability testing device for a side protective surface net bag of an automobile trunk, which comprises a testing frame, a first working table and a second working table are fixed on the testing frame, a positioning tool for fixing the automobile trunk is arranged on the first working table, and a stretching assembly is arranged on the second working table. The utility model relates to the technical field of automobile accessory detection tools, and adopts motor driving to realize accurate control of opening and closing actions of a trunk side protective surface net bag, so as to ensure the consistency and repeatability of each test and greatly improve the accuracy of test data. Compared with traditional manual testing, the automatic testing device can work continuously, the testing period is remarkably shortened, and fast-paced product iteration requirements are met. Through an automatic technical means, the test efficiency and accuracy are improved, the production cost is reduced, and the product quality control level is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts inspection tools, in particular to a vehicle luggage box side protection surface net bag opening and closing fatigue durability testing device. Background Art

[0002] With the rapid development of the automotive industry, cars have become an indispensable means of transportation in modern life. Consumers have placed higher demands on the comfort, aesthetics, and durability of vehicle interiors. As a crucial component of vehicle storage space, the design of the side mesh pockets directly impacts the convenience and safety of storage. However, in actual use, these side mesh pockets are frequently opened and closed, making them susceptible to wear, deformation, and even damage, impacting their service life and the overall quality of the vehicle.

[0003] Traditional luggage side net performance testing relies primarily on manual labor, a method with numerous limitations. First, human error is inevitable, and consistent test conditions are difficult to maintain across tests, resulting in poor data reproducibility. Second, manual testing is inefficient, time-consuming, and labor-intensive, making it difficult to meet the rapid verification requirements required before mass production. Third, fatigue durability assessments are insufficiently accurate, making it impossible to effectively predict product performance degradation over long-term use.

[0004] Given this, the development of an automated, standardized vehicle trunk side panel mesh opening and closing fatigue durability test device is particularly urgent. This device is designed to simulate the actual opening and closing motions experienced during use, repeatedly loading the mesh material and structure. This allows for a scientific and efficient evaluation of its durability, providing a reliable basis for product design optimization and quality control. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a car trunk side guard net bag opening and closing fatigue durability testing device, which solves the problems of low efficiency of existing net bag performance testing and difficulty in meeting the rapid verification needs before large-scale production.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a vehicle trunk side cover net bag opening and closing fatigue durability test device, the device comprising a test frame, a first workbench and a second workbench fixed to the test frame, the first workbench is provided with a positioning tool for fixing the vehicle trunk, and the second workbench is provided with a stretching assembly;

[0007] The stretching assembly comprises:

[0008] a first positioning seat and a second positioning seat;

[0009] A motor is provided on the first positioning seat, a rotating arm is fixed to the output end of the motor, and a first pull rod is rotatably connected to the rotating arm;

[0010] A positioning sleeve is provided on the second positioning seat, a movable pull rod assembly is provided in the positioning sleeve, one end of the movable pull rod assembly is hinged to the first pull rod, and the other end is provided with a positioning piece.

[0011] Preferably, the movable pull rod assembly includes:

[0012] A sliding sleeve assembly is provided inside the positioning sleeve;

[0013] An electric telescopic rod, provided on the sliding sleeve assembly;

[0014] A positioning member fixed to the output end of the electric telescopic rod;

[0015] One end of the second pull rod is connected to the fixed end of the electric telescopic rod, and the other end is hinged to the first pull rod.

[0016] Preferably, the sliding sleeve assembly comprises:

[0017] A movable sleeve, arranged inside the positioning sleeve;

[0018] The outer sleeve is slidably connected to the inner cavity of the movable sleeve through a sliding bearing; the outer sleeve is fixedly sleeved on the outer side of the electric telescopic rod.

[0019] Preferably, both ends of the movable sleeve are rotatably connected to the inner side of the positioning sleeve via a rotating shaft.

[0020] Preferably, the positioning member includes a clamping claw, a hook, or a suction cup.

[0021] Preferably, the positioning tool comprises a plurality of tool racks, a positioning plate is fixed on the top of the tool rack, and a plurality of positioning holes are opened on the surface of the positioning plate from top to bottom.

[0022] Preferably, an assembly beam is fixed on the positioning plate, and the assembly beam is connected to the positioning hole by bolts.

[0023] Preferably, the positioning tool further includes a bottom positioning assembly, and the bottom positioning assembly includes:

[0024] a bottom plate fixed on the first workbench;

[0025] A positioning column, fixed on the base plate;

[0026] The pressure plate has its rear side sleeved on the positioning column, the middle part of the pressure plate is connected to the base plate through a tension spring, the front side of the pressure plate is a clamping end, a flexible pad is fixed to the bottom surface of the clamping end, and a clamping cavity is provided in the profile between the clamping end and the base plate.

[0027] Preferably, a T-shaped cylinder is fixed to the rear side of the pressing plate, and the T-shaped cylinder is sleeved on the positioning column.

[0028] Preferably, a positioning platform is fixed to the bottom of the positioning column, and the pressure plate abuts against the positioning platform.

[0029] The present invention provides a vehicle trunk side cover net bag opening and closing fatigue durability test device, which has the following beneficial effects compared with the prior art:

[0030] 1. A motor-driven system precisely controls the opening and closing of the luggage side mesh pockets, ensuring consistency and repeatability throughout each test and significantly improving test data accuracy. Compared to traditional manual testing, the automated test system operates continuously, significantly shortening testing cycles and adapting to the rapid pace of product iteration.

[0031] 2. The test device can precisely set parameters such as stretching speed, number of times, and dwell time to simulate the performance of the net bag under different usage intensities. This flexible adjustment capability makes the test more realistic and helps to comprehensively evaluate the durability of the product under different conditions.

[0032] 3. Reduced reliance on manual operation, reducing test errors and costs caused by human factors. At the same time, stable machine operation also avoids operator fatigue caused by long-term repetitive work, further improving the reliability of test results.

[0033] 4. Discover and resolve potential quality issues before they occur, reducing the production and circulation of substandard products, thereby reducing resource waste and environmental pollution. At the same time, optimized product design can extend product life, in line with the current trend of green and sustainable development.

[0034] In summary, the development of the "Automobile Trunk Side Protector Net Opening and Closing Fatigue Durability Tester" fills a gap in trunk side protector net performance testing. Through automated technology, it improves testing efficiency and accuracy, reduces production costs, and enhances product quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0036] Figure 2 This is a schematic diagram of the structure of the stretching component of the utility model;

[0037] Figure 3 For this utility model Figure 2 A in the middle is an enlarged schematic diagram;

[0038] Figure 4For this utility model Figure 2 Left view of the second positioning seat;

[0039] Figure 5 This is a schematic diagram of the bottom positioning assembly structure of the utility model;

[0040] Figure 6 This is a schematic diagram of the bottom positioning component structure of the utility model.

[0041] Description of reference numerals in the figures

[0042] 1. Test frame, 2. First workbench, 3. Second workbench, 4. Fixture frame, 5. Assembly beam, 6. Positioning hole, 7. Positioning plate, 8. Stretching assembly, 81. First positioning seat, 82. Motor, 83. Rotating arm, 84. First pull rod, 85. Second pull rod, 86. Electric telescopic rod, 87. Second positioning seat, 88. Positioning sleeve, 89. Outer sleeve, 810. Sliding bearing, 811. Positioning piece, 812. Movable sleeve, 813. Rotating shaft, 9. Bottom positioning assembly, 91. Bottom plate, 92. Clamping cavity, 93. Tensile spring, 94. Positioning column, 95. T-type cylinder, 96. Positioning table, 97. Press plate, 98. Flexible pad. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. As long as the effects of the present invention can be exerted, various changes can be made to the embodiments.

[0044] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process.

[0045] Reference Figure 1-6 A vehicle trunk side cover net bag opening and closing fatigue durability testing device according to this embodiment is described.

[0046] The test frame 1 includes a first workbench 2 and a second workbench 3 fixed on the test frame 1. The first workbench 2 is provided with a positioning tool for fixing the car trunk, and the second workbench 3 is provided with a stretching component 8. In specific implementation, the number of the first workbench 2 can be multiple, such as Figure 1 As shown, in this embodiment, two positioning fixtures are preferably used. Accordingly, the number of positioning fixtures is equal to the number of first workbenches 2. When there are two first workbenches 2, they are located on both sides of the second workbench 3. In this case, the number of stretching assemblies 8 is also two, realizing the fatigue durability test of the opening and closing of two automobile trunk side cover net bags.

[0047] like Figure 1 As shown, the positioning fixture includes multiple fixture frames 4, with a positioning plate 7 fixed to the top of each fixture frame 4. The positioning plate 7 has a plurality of positioning holes 6 formed on its surface from top to bottom. In one embodiment, the trunk is assembled to the positioning holes 6 of the positioning plate 7 via bolts. The positioning holes 6 are arranged in multiple rows vertically, allowing the trunk to be adjusted vertically.

[0048] Furthermore, in another embodiment, a mounting beam 5 is fixed to the positioning plate 7 and bolted to the positioning holes 6. The mounting beam 5 is an aluminum slide rail square tube frame. In this case, the trunk can be directly mounted to the mounting beam 5 via bolts. The mounting beam design allows the trunk to be freely moved laterally along the mounting beam 5. The multiple positioning holes 6 and the mounting beam 5 design allow the trunk to be freely adjusted vertically, horizontally, and horizontally, facilitating operation of the tensioning assembly 8.

[0049] like Figure 6 As shown, the positioning fixture also includes a bottom positioning assembly 9, which includes a base plate 91, positioning posts 94, and a pressure plate 97. Base plate 91 is fixed to first workbench 2, and positioning posts 94 are fixed to base plate 91. The rear side of pressure plate 97 is sleeved over positioning posts 94. The middle portion of pressure plate 97 is connected to base plate 91 via a tension spring 93. The front side of pressure plate 97 serves as a clamping end, and a clamping cavity 92 is formed between the clamping end and base plate 91. A flexible rubber pad 98 is fixed to the bottom surface of the clamping end.

[0050] During testing, the upper part of the car trunk is fixed by the tooling frame 4 and the assembly beam 5, and the lower part is seated on the bottom plate 91. At this time, the pressure plate 97 is pulled upward to move the bottom side plate of the car trunk into the clamping cavity 92. The pressure plate 97 is released, and the elastic retraction force of the tension spring 93 drives the pressure plate 97 to descend and press on the variable plate of the car trunk, forming a pressed fixation to prevent the car trunk from shifting during the repeated stretching process of the stretching assembly 8.

[0051] Furthermore, a T-shaped cylinder 95 is fixed to the rear side of the pressing plate 97, and the T-shaped cylinder 95 is sleeved on the positioning column 94. The design of the T-shaped cylinder 95 can facilitate the two-finger hooking of the human hand, so as to facilitate the upward stretching work of the pressing plate 97.

[0052] Furthermore, a positioning platform 96 is fixed to the bottom of the positioning column 94, and the pressure plate 97 abuts against the positioning platform 96. The thickness of the positioning platform is equal to the thickness of the tension spring 93 in the retracted state, so that after the tension spring 93 is retracted, the pressure plate 97 abuts against the positioning platform 96, and the pressure plate 97 is supported at two points by the tension spring 93 and the positioning platform 96.

[0053] In one embodiment, Figure 2As shown, the stretching assembly 8 includes a first positioning seat 81 and a second positioning seat 87; a motor 82 is provided on the first positioning seat 81, and a rotating arm 83 is fixed to the output end of the motor 82, and a first pull rod 84 is rotatably connected to the rotating arm 83; a positioning sleeve 88 is provided on the second positioning seat 82, and a movable pull rod assembly is provided in the positioning sleeve 88, one end of the movable pull rod assembly is hinged to the first pull rod 84, and the other end is provided with a positioning member 811, and the positioning member 811 includes a clamping claw, a hook, or a suction cup. During operation, the positioning member 811 is connected to the buckle of the side guard net bag of the car trunk by selecting a clamping claw, a hook, or a suction cup according to the type of buckle. The motor 82 drives the rotating arm 83 to rotate. During the rotation process, the rotating arm 83 drives the first pull rod 84 to stretch and swing. The first pull rod 84 drives the movable pull rod assembly to repeatedly push and pull back the buckle and the net bag horizontally. By adjusting parameters such as the speed and number of rotations of the motor 82, different test times can be set according to demand and applied to the side guard nets of different models, replacing manual testing by personnel, greatly saving test time, improving test accuracy, and reducing product development and testing costs.

[0054] In addition, during actual operation, the motor 82 is electrically connected to a PLC controller, which is connected to a counter. The number of stretching times of the stretching assembly 8 is counted according to the number of rotations of the motor 82, and the number of times the side guard net bag of the car trunk is damaged by stretching is calculated through the counter. The operating requirements are low, the operation is convenient, and it is easy to learn and use.

[0055] like Figure 2 and Figure 3 As shown, the movable rod assembly includes a sliding sleeve assembly, an electric telescopic rod 86, a positioning member 811, and a second rod 85. The sliding sleeve assembly is mounted inside the positioning sleeve 8; the electric telescopic rod 86 is mounted on the sliding sleeve assembly; the positioning member 811 is fixed to the output end of the electric telescopic rod 86; one end of the second rod 85 is connected to the fixed end of the electric telescopic rod 86, and the other end is hinged to the first rod 84.

[0056] like Figure 3 and Figure 4 As shown, the sliding sleeve assembly includes a movable sleeve 812 and an outer sleeve 89. The ends of the movable sleeve 812 are rotatably connected to the inner side of the positioning sleeve 88 via a rotating shaft 813. The outer sleeve 89 is slidably connected to the inner cavity of the movable sleeve 812 via a sliding bearing 810; the outer sleeve 89 is fixedly mounted on the outer side of the electric telescopic rod 86.

[0057] The first pull rod 84 repeatedly pushes and pulls the second pull rod 85 when swinging back, and the second pull rod 85 drives the electric telescopic rod 86 and the outer sleeve 89 to slide and connect in the movable sleeve 812 through the sliding bearing 810, so as to achieve the purpose of reciprocating stretching. During the reciprocating stretching, the buckle of the side guard net bag of the car trunk is pulled, so that the side guard net bag of the car trunk is repeatedly stretched to measure the opening and closing performance of the net bag.

[0058] In this embodiment, the electric telescopic rod 86 is designed. When the side protection net bag of the car trunk needs to be stretched to a larger opening, the electric telescopic rod 86 can be retracted to increase the stretching opening of the net bag.

[0059] On the other hand, the movable sleeve 812 is rotatably connected to the positioning sleeve 88 via the rotating shaft 813, so that the movable sleeve 812 can be adjusted in the forward and backward tilt angle via the rotating shaft 813, and the positioning member 811 can be adjusted in height for easy fixation on the buckle of the net bag.

[0060] Working Principle: During measurement, the trunk is placed on the first workbench 2 and secured to the assembly beam 5 using bolts inserted through the bolt holes at the top of the trunk. The lower portion of the trunk is placed on the base plate 91. The pressure plate 97 is then pulled upward to move the bottom side panel of the trunk into the clamping cavity 92. The pressure plate 97 is then released, and the elastic retraction force of the tension spring 93 drives the pressure plate 97 downward to press against the trunk's flexible plate, securing it. The bolts at the top of the trunk are then tightened to secure the trunk to the assembly beam 5, securing the trunk at both ends.

[0061] The positioning piece 811 is fixed on the buckle of the net bag, and the motor 82 drives the rotating arm 83 to rotate. During the rotation, the rotating arm 83 drives the first pull rod 84 to stretch and swing. The first pull rod 84 drives the second pull rod 85 and the electric telescopic rod 86 to push and pull back and forth. During the pushing and pulling of the electric telescopic rod 86, the outer sleeve 89 fixed on the outside is slidably connected to the movable sleeve 812 through the sliding bearing 810 to achieve the purpose of reciprocating stretching. During the reciprocating stretching, the buckle of the side guard net bag of the car trunk is pulled to repeatedly stretch the side guard net bag of the car trunk to measure the opening and closing performance of the net bag.

[0062] When a wide-opening stretching is required, the electric telescopic rod 86 can be retracted to increase the stretching opening of the net bag.

[0063] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle trunk side cover net bag opening and closing fatigue durability testing device, characterized in that: The device comprises a test frame (1), a first workbench (2) and a second workbench (3) being fixed on the test frame (1), a positioning tool for fixing a car trunk being provided on the first workbench (2), and a stretching assembly (8) being provided on the second workbench (3); The stretching assembly (8) comprises: A first positioning seat (81) and a second positioning seat (87); A motor (82) is provided on the first positioning seat (81), a rotating arm (83) is fixed to the output end of the motor (82), and a first pull rod (84) is rotatably connected to the rotating arm (83); A positioning sleeve (88) is provided on the second positioning seat (87), and a movable pull rod assembly is provided in the positioning sleeve (88). One end of the movable pull rod assembly is hinged to the first pull rod (84), and the other end is provided with a positioning piece (811).

2. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 1, characterized in that: The movable pull rod assembly includes: A sliding sleeve assembly is arranged inside the positioning sleeve (88); An electric telescopic rod (86) is provided on the sliding sleeve assembly; A positioning member (811) is fixed to the output end of the electric telescopic rod (86); The second pull rod (85) has one end connected to the fixed end of the electric telescopic rod (86) and the other end hinged to the first pull rod (84).

3. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 2, characterized in that: The sliding sleeve assembly comprises: A movable sleeve (812) is arranged inside the positioning sleeve (88); The outer sleeve (89) is slidably connected to the inner cavity of the movable sleeve (812) via a sliding bearing (810); the outer sleeve (89) is sleeved and fixed on the outside of the electric telescopic rod (86).

4. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 3, characterized in that: The two ends of the movable sleeve (812) are rotatably connected to the inner side of the positioning sleeve (88) via a rotating shaft (813).

5. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 2, characterized in that: The positioning member (811) includes a clamping claw, a hook, or a suction cup.

6. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 1, characterized in that: The positioning tool comprises a plurality of tool frames (4), a positioning plate (7) is fixed on the top of the tool frame (4), and a plurality of positioning holes (6) are opened on the surface of the positioning plate (7) from top to bottom.

7. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 6, characterized in that: An assembly beam (5) is fixed on the positioning plate (7), and the assembly beam (5) is connected to the positioning hole (6) via bolts.

8. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 6, characterized in that: The positioning tool further comprises a bottom positioning assembly (9), and the bottom positioning assembly (9) comprises: A bottom plate (91) is fixed on the first workbench (2); A positioning column (94) is fixed on the base plate (91); A pressure plate (97), the rear side of the pressure plate (97) is sleeved on the positioning column (94), the middle part of the pressure plate (97) is connected to the base plate (91) through a tension spring (93), the front side of the pressure plate (97) is a clamping end, a flexible pad (98) is fixed to the bottom surface of the clamping end, and a clamping cavity (92) is provided in the profile between the clamping end and the base plate (91).

9. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 8, characterized in that: A T-shaped cylinder (95) is fixed to the rear side of the pressing plate (97), and the T-shaped cylinder (95) is sleeved on the positioning column (94).

10. The vehicle trunk side cover net bag opening and closing fatigue durability testing device according to claim 8, characterized in that: A positioning platform (96) is fixed to the bottom of the positioning column (94), and the pressing plate (97) abuts against the positioning platform (96).

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