A bicycle rack inspection process and apparatus
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HANGZHOU XINXING BICYCLE PARTS
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-02
Smart Images
Figure CN120741003B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bicycle rack inspection technology, and in particular to a bicycle rack inspection process and equipment. Background Technology
[0002] In the fields of transportation and outdoor sports, bicycles are seeing their applications expand due to their eco-friendly, flexible, and convenient features. As a core component for carrying goods, bicycle racks must withstand complex external forces from various directions during everyday shopping and long-distance cycling trips to transport equipment. If a rack deforms or breaks due to quality issues, not only will goods fall, but it could also cause the rider to lose balance, leading to serious accidents. Therefore, establishing a scientific and comprehensive inspection process system and equipping it with efficient and adaptable equipment are crucial to ensuring the quality and reliability of bicycle racks.
[0003] The quality inspection process for bicycle racks includes key steps such as dynamic vertical fatigue testing, dynamic horizontal fatigue testing, and static horizontal fatigue testing, aiming to comprehensively evaluate the durability and reliability of bicycle racks under different stress conditions.
[0004] The following procedures were followed during the dynamic vertical fatigue test: First, two sets of fixing devices were used to securely fix both ends of the bicycle rack, ensuring its stability during the test and preventing displacement from affecting the accuracy of the test results. For the rear saddle of the bicycle rack, two sets of support bars and screw rods were used in conjunction, with weights fixed in the appropriate positions using nuts. This applied a vertical bearing force to the bicycle rack, simulating the vertical load the rack would experience in actual use.
[0005] After completing the above preparations, start the vibration equipment and vibrate the bicycle rack vertically at a frequency of 7Hz, with an amplitude of 5mm, for 100,000 consecutive cycles. After the entire vibration test is completed, carefully inspect the bicycle rack for any damage such as cracks or visible fissures to determine whether it has passed the dynamic vertical fatigue test.
[0006] However, the existing fixing method has obvious shortcomings. When replacing and reinstalling a bicycle rack that has already been inspected, multiple sets of nuts need to be turned sequentially. This operation not only consumes a lot of time and effort, resulting in low testing efficiency, but also increases the labor intensity of operators due to the cumbersome installation and disassembly process, which is not conducive to carrying out efficient bicycle rack inspection work. Therefore, it is necessary to design a bicycle rack inspection process and its equipment.
[0007] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention
[0008] This invention provides a bicycle rack inspection process and equipment to solve the problems of existing bicycle rack inspection and fixing methods that require operating multiple sets of nuts and knobs one by one, which are time-consuming, labor-intensive, inefficient, and have high labor intensity, thus hindering efficient inspection.
[0009] The present invention employs the following technical solution: a bicycle rack inspection device. It includes a dynamic vertical fatigue testing component, comprising a first fixing unit for fixing one end of the bicycle rack, a displacement unit for fixing the other end of the bicycle rack, and a first fixing assembly for limiting the position of the rear frame of the bicycle rack. The first fixing assembly includes a fixing box, two sets of first holding rods, two sets of second holding rods, and a limiting unit. The fixing box is adapted to hold weights for counterweighting the rear frame of the bicycle rack. The first and second holding rods are used to hold and limit the weights. A certain gap exists between the first and second holding rods to cooperate with the limiting unit to change the distance between the two sets of first holding rods, thereby achieving the function of quickly assembling counterweights.
[0010] Furthermore, the dynamic vertical fatigue testing component also includes a first working box, on which a first adjusting component for supporting and fixing the bicycle rack is installed. The fixing box is placed on the rear frame of the bicycle rack. The fixing box has four sets of limiting blocks arranged opposite each other. Weights are placed between the four sets of limiting blocks. A limiting unit is sleeved on the fixing box. Two sets of first holding rods are arranged horizontally opposite each other. The first holding rods are connected to the second holding rods through connecting columns. The two ends of the connecting columns are respectively connected to the first holding rods and the second holding rods. The other ends of the first holding rods and the second holding rods are connected to screw rods. Nuts are threaded to both ends of the screw rods. Anti-slip silicone pads are provided at the contact positions between the two sets of first holding rods and the weights.
[0011] Guide plates are provided at the upper ends of the two sets of first pressing rods. Guide rails are provided on the side of the guide plates near the first pressing rods. Two sets of sliding blocks are slidably installed on the guide rails. The two sets of sliding blocks are respectively fixed to the two sets of first pressing rods. Mounting blocks are installed on the guide plates. Lifting rings are mounted on the mounting blocks with bearings. One end of the lifting ring passes through the mounting block. A second gear is installed on one end of the lifting ring. Second racks corresponding to the second gears are installed on the sides of the two sets of sliding blocks. The two sets of second racks are arranged opposite to each other.
[0012] A fixing part is installed on the side of the lifting ring. The fixing part is set to fit against the upper surface of the mounting block, and a wing bolt is connected to the fixing part.
[0013] Furthermore, the first fixing unit includes a horizontal bar located at the upper end of the first working box, on which a first slider and a second slider are slidably mounted. Both the first slider and the second slider can be fixed to the horizontal bar by fasteners. Two sets of support columns are installed on the first working box to support the horizontal bar.
[0014] The second slider is equipped with two sets of connecting parts. One end of the bicycle rack is adapted to overlap the two sets of connecting parts. Both sets of connecting parts are threaded with bolts. The bolts are adapted to pass through one end of the bicycle rack and be threaded to the connecting parts.
[0015] Furthermore, the displacement unit is mounted on the first slider. The displacement unit includes a recessed rod mounted on the first slider. A first sliding seat is slidably mounted on the recessed rod. A forward and reverse motor is mounted on the side of the first sliding seat. A first gear is mounted on the output end of the forward and reverse motor. The first gear is located inside the first sliding seat. A space for storing the first gear is provided inside the first sliding seat. A first rack that meshes with the first gear is installed inside the recessed rod. The first rack is movably disposed through the first sliding seat. A support seat is mounted on the first sliding seat. The support seat is used to support the other end of the bicycle rack. The other end of the bicycle rack can be fixed to the support seat by fasteners.
[0016] Furthermore, a first lifting assembly is provided on one side of the first work box. The first lifting assembly includes a support rod installed on one side of the first work box, a hanger installed on the support rod, the hanger being arranged perpendicular to the support rod, a sliding support slidably installed on the hanger, and a chain electric hoist installed on the side of the sliding support near the first work box. The chain electric hoist has a chain and a hook adapted to the lifting ring.
[0017] Furthermore, a first drive assembly is installed inside the first work box. The first drive assembly includes a base installed inside the first work box, a first motor installed on the base, the first motor having a rotating shaft, two sets of first bearing seats installed on the base, an eccentric rod installed between the two sets of first bearing seats, one end of the eccentric rod being fixedly connected to a rotating shaft, an eccentric wheel being movably sleeved on the eccentric rod, a pushing part being movably installed on the eccentric wheel, the pushing part having a support rod, the support rod being movably inserted through the first work box, and one end of the support rod being fixedly connected to the horizontal bar.
[0018] Furthermore, a first detection component is installed on the first work box. The first detection component includes a concave frame installed on the first work box. A first screw is threaded to the side of the concave frame. A turntable is fixedly installed at one end of the first screw. A displacement block is mounted on a bearing at one end of the first screw. The displacement block is in contact with the upper surface of the first work box. Two sets of fixing bars are installed on the first work box. There is a certain distance between the two sets of fixing bars.
[0019] A rotating part is rotatably installed between one end of the two sets of fixed bars. The rotating part has long grooves on both sides and a through groove is opened on the rotating part. The through groove is connected to the long groove. The long groove and the through groove are combined to define a limiting groove. A sliding protrusion adapted to slide in the limiting groove is installed on the displacement block.
[0020] A support rod is installed at one end of the rotating part, and a first acceleration sensor is installed on the side of the support rod. The first acceleration sensor has a contact rod.
[0021] Furthermore, a dynamic horizontal fatigue testing component is provided on one side of the first working box. The dynamic horizontal fatigue testing component includes a second working box provided on one side of the first working box. A second drive component is installed inside the second working box. The second drive component includes a platform installed inside the second working box. A second motor is installed on the platform. A long rod is installed at the output end of the second motor. A connecting piece is installed on the long rod near one end.
[0022] The second working box is equipped with two sets of second bearing seats, and a crossbar is rotatably mounted on the two sets of second bearing seats. A rocker arm is mounted on the side of the crossbar near the second working box. The rocker arm moves through the second working box. The second working box has a through groove larger than the width of the rocker arm, which provides rocker arm swing space. One end of the rocker arm has a waist groove, and the connector is located in the waist groove. One end of the connector has a limiting part, which is used to prevent the connector from coming out of the waist groove.
[0023] The second working box is equipped with a second adjustment assembly. The second adjustment assembly and the first adjustment assembly have similar structures. The difference between the second adjustment assembly and the first adjustment assembly is that the horizontal bar of the second adjustment assembly is defined as a crossbar. The crossbar bearing is installed between two sets of second bearing seats. The crossbar is no longer supported by the two sets of support columns.
[0024] The first slider and the second slider of the second adjustment component are defined as the third slider and the fourth slider. The second adjustment component is fixedly installed on the third slider and the fourth slider. The second adjustment component and the first adjustment component have similar structures for fixing the two ends of the bicycle rack.
[0025] The bicycle rack has a second fixing component fixed on the rear saddle. The second fixing component has a similar structure to the first fixing component. A second lifting component is provided on one side of the second work box. The second lifting component has a similar structure to the first lifting component. A second detection component is installed on the second work box. The second detection component has a similar structure to the first detection component. The first acceleration sensor of the second detection component is defined as the second acceleration sensor. The detection end of the second acceleration sensor is located at the center of both ends of the bicycle rack.
[0026] Furthermore, a static level detection component is provided on one side of the second work box. The static level detection component includes a third work box provided on one side of the second work box. A base is installed on the third work box. A bicycle rack body is fixedly installed on the base by multiple sets of bolts. A first moving unit is installed on the second work box.
[0027] The first moving unit includes a concave frame mounted on the second working box and located on one side of the base. A lead screw is mounted on the concave frame with a bearing. A rotating component is mounted on one end of the lead screw. Guide posts are mounted on both sides of the lead screw on the concave frame. A slide is threaded onto the lead screw. The slide is movably sleeved on both sets of guide posts. A right-angle frame is mounted on the side of the slide. The second moving unit is mounted on the right-angle frame.
[0028] The second moving unit includes a slotted frame mounted on the side of the right-angle frame away from the concave frame. A second screw is mounted on the slotted frame with bearings. Limiting rods are mounted on the slotted frame at both sides of the second screw. A slide is threaded onto the second screw. The slide is movably sleeved on the two sets of limiting rods. A digital push-pull force gauge is mounted on the slide. The digital push-pull force gauge has a contact head that is adapted to contact the bicycle rack body.
[0029] A digital displacement measuring scale is installed on the slotted frame, and a reading head is slidably installed on the digital displacement measuring scale. The reading head is connected to the digital push-pull force gauge.
[0030] Furthermore, the inspection process for the bicycle rack is as follows:
[0031] Step 1: Adjust the first and second sliders to fit the horizontal bar position to the shelf, fix the sliders with fasteners, fix one end of the shelf with the connecting parts and bolts, start the forward and reverse motor of the displacement unit to drive the support base to move and fix the other end, and complete the installation of the shelf in the dynamic vertical fatigue test component.
[0032] Step 2: Place the fixing box and weights on the rear saddle of the shelf, connect the first and second pressure rods, rotate the lifting ring to adjust the spacing, tighten the wing bolts to fix them, and check the anti-slip silicone pads to ensure they are clamped tightly.
[0033] Step 3: Operate the electric chain hoist to engage the hook with the lifting ring; start the first motor to drive the shelf to vibrate vertically, and adjust the speed and eccentricity setting parameters; adjust the position of the first acceleration sensor, start testing and record the vibration frequency;
[0034] Step 4: Install the shelf onto the dynamic horizontal fatigue testing assembly, adjust and fix the third and fourth sliders to fit the shelf, and install the adjustment weights; start the second motor to make the shelf swing horizontally, activate the second lifting assembly for protection, and adjust the detection data of the second acceleration sensor;
[0035] Step 5: Fix the shelf to the base of the static level detection component, adjust the position of the digital push-pull force gauge to contact the shelf using the lead screw and second screw, apply a horizontal force and record the displacement, and analyze the data to evaluate the static performance of the shelf.
[0036] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects:
[0037] A bicycle rack inspection process and equipment involves first placing a fixing box on the rear saddle of the rack, using a limiting block to restrict the horizontal sides of the weights, then manually operating the connecting column to engage the holding rod with the fixing box, and securing it with a screw and nut. When adjusting the fixing force for different weight masses, rotating the hanging ring drives the second gear, which, through meshing with the second rack, changes the distance between the first holding rods. After adjustment, the hanging ring is secured with a wing bolt. Anti-slip silicone pads enhance the clamping force. Compared to the cumbersome, inefficient, and labor-intensive method of fixing with multiple sets of nuts and knobs, this process ensures the stability and accuracy of the vertical load on the rack during testing, guaranteeing the reliability of fatigue test results. Attached Figure Description
[0038] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.
[0039] In the attached diagram:
[0040] Figure 1 This is an overall schematic diagram of a bicycle rack inspection process and equipment according to this application;
[0041] Figure 2 for Figure 1 Schematic diagram of the first adjusting component and the first hoisting component;
[0042] Figure 3 for Figure 2 A diagram of the back of the building;
[0043] Figure 4 for Figure 2 Internal structure diagram;
[0044] Figure 5 for Figure 3 Enlarged view of point A;
[0045] Figure 6 for Figure 2 Enlarged view of point B;
[0046] Figure 7 for Figure 2 Enlarged view of point C;
[0047] Figure 8 for Figure 1 A schematic diagram of the horizontal fatigue testing component structure;
[0048] Figure 9 for Figure 8 Internal structure diagram;
[0049] Figure 10 for Figure 1 A schematic diagram of the static horizontal detection component structure;
[0050] Figure 11 for Figure 10 Enlarged view of point D;
[0051] Figure label:
[0052] 1. First working box; 11. First PLC control system;
[0053] 2. First adjusting component; 21. Horizontal bar; 22. First slider; 23. Support column; 24. Second slider; 26. Connecting part; 27. Bolt; 28. Hollow rod; 29. First sliding seat; 210. Forward and reverse motor; 211. First gear; 212. Support seat; 213. First rack;
[0054] 3. First hoisting assembly; 31. Support rod; 32. Hoist; 33. Sliding support; 34. Electric chain hoist; 35. Chain; 36. Hook;
[0055] 4. First fixing component; 41. Mounting block; 42. Lifting ring; 43. Second gear; 44. Fixing part; 45. Wing bolt; 46. Guide plate; 47. Guide rail; 48. Sliding block; 49. First holding rod; 410. Connecting column; 411. Second holding rod; 412. Screw head rod; 413. Nut; 414. Second rack; 415. Fixing box; 416. Weight; 417. Limiting block;
[0056] 5. First detection component; 51. Concave frame; 52. First screw; 53. Turntable; 54. Displacement block; 55. Fixing bar; 56. Rotating part; 57. Sliding protrusion; 59. Support rod; 510. First acceleration sensor;
[0057] 6. First drive assembly; 61. Base; 62. First motor; 63. Rotating shaft; 64. First bearing housing; 65. Eccentric wheel; 66. Pushing part; 67. Support rod;
[0058] 7. Second working box; 71. Second PLC control system; 72. Second adjustment assembly; 73. Second hoisting assembly; 74. Second detection assembly; 76. Second drive assembly; 761. Base; 762. Second motor; 763. Long bar; 764. Connector; 765. Swing arm; 766. Waist groove; 767. Second bearing seat; 768. Crossbar; 77. Second fixing assembly;
[0059] 8. Static level detection assembly; 81. Third working box; 82. Base; 83. Bicycle rack body; 84. Concave frame; 85. Lead screw; 86. Guide post; 87. Rotating component; 88. Slide; 89. Right angle frame; 810. Channel frame; 811. Second screw; 812. Limiting rod; 813. Slide table; 814. Digital push-pull force gauge; 815. Contact head; 816. Digital displacement measuring ruler; 817. Reading head. Detailed Implementation
[0060] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0061] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0062] Example 1: Refer to Figures 1 to 11 As shown, this embodiment of the invention provides a bicycle rack inspection process and equipment, including a dynamic vertical fatigue testing component, a dynamic horizontal fatigue testing component, and a static horizontal detection component 8;
[0063] The dynamic vertical fatigue testing assembly includes a first working box 1, and a first adjustment assembly 2 is fixedly installed on the first working box 1. The first adjustment assembly 2 is used to support and fix the bicycle rack. The first adjustment assembly 2 includes a first fixing unit at the upper end of the first working box 1. The first fixing unit includes a horizontal bar 21 at the upper end of the first working box 1. A first slider 22 and a second slider 24 are slidably installed on the horizontal bar 21. The first slider 22 and the second slider 24 can be fixed to the horizontal bar 21 by fasteners. At the same time, two sets of support columns 23 are fixedly installed on the first working box 1 to support the horizontal bar 21.
[0064] Two sets of connecting parts 26 are fixedly installed on the second slider 24. One end of the bicycle rack is adapted to overlap the two sets of connecting parts 26. Bolts 27 are threadedly connected to both sets of connecting parts 26. The bolts 27 are adapted to pass through one end of the bicycle rack and be threadedly connected to the connecting parts 26.
[0065] A displacement unit for fixing the other end of the bicycle rack is installed on the first slider 22. The displacement unit includes a recessed rod 28 fixedly installed on the first slider 22. A first sliding seat 29 is slidably installed on the recessed rod 28. A forward and reverse motor 210 is fixedly installed on the side of the first sliding seat 29. A first gear 211 is fixedly installed at the output end of the forward and reverse motor 210. The first gear 211 is located inside the first sliding seat 29. At the same time, a recessed space for storing the first gear 211 is opened in the first sliding seat 29. A first rack 213 that meshes with the first gear 211 is fixedly installed in the recessed rod 28. The first rack 213 is movably inserted through the first sliding seat 29.
[0066] Furthermore, a support seat 212 is fixedly installed on the side of the first sliding seat 29 away from the forward and reverse motor 210. The support seat 212 is used to support the other end of the bicycle rack, and the other end of the bicycle rack can be fixed to the support seat 212 by fasteners.
[0067] During dynamic vertical fatigue testing, the positions of the first slider 22 and the second slider 24 on the horizontal bar 21 are adjusted according to the dimensions of the bicycle rack to match the distance between the two ends of the rack. The rack is then fixed to the horizontal bar 21 with fasteners, completing the initial positioning. Next, one end of the rack is attached to the two sets of connecting parts 26 on the second slider 24. Bolts 27 are tightened, passing through the rack and threaded into the connecting parts 26, firmly fixing one end of the rack. For the other end of the rack, the forward and reverse motor 210 of the displacement unit on the first slider 22 is activated. The motor drives the first gear 211 to rotate. Since the first gear 211 meshes with the first rack 213 inside the recessed rod 28, the first sliding seat 29 slides along the recessed rod 28, adjusting the support seat 212 to a position that fits against the end of the rack. The rack is then fixed to the support seat 212 with fasteners. In this way, the rack is fixed from both ends by the support seat 212 and the connecting parts 26, providing a stable and reliable foundation for subsequent dynamic vertical fatigue testing, ensuring the rack's position is stable and the test data is accurate during the test.
[0068] To provide vertical holding force to the fixed bicycle rack and to simulate real-world usage requirements for testing, such as... Figures 2-3 and Figure 6 As shown, a first fixing component 4 is provided on the rear saddle of the bicycle rack. The first fixing component 4 includes a fixing box 415 placed on the rear saddle of the bicycle rack. The fixing box 415 has four sets of limiting blocks 417 arranged in pairs opposite each other, and a weight 416 is placed between the four sets of limiting blocks 417. The weight 416 is adapted to be restricted on two horizontal sides by the four sets of limiting blocks 417 (see reference). Figure 6 );
[0069] A limiting unit is sleeved on the fixed box 415. The limiting unit includes two sets of first pressing rods 49 arranged horizontally opposite each other. The first pressing rods 49 are connected to second pressing rods 411 through connecting posts 410. The two ends of the connecting posts 410 are respectively connected to the first pressing rods 49 and the second pressing rods 411. A screw head rod 412 is connected to the other end of the first pressing rods 49 and the second pressing rods 411. Nuts 413 are threaded to both ends of the screw head rod 412.
[0070] In the initial state, when it is necessary to fix the two vertical ends of the weight 416 placed on the fixed box 415, the connecting column 410 can be manually held so that the first pressing rod 49 and the second pressing rod 411 are sleeved on the fixed box 415. Then the screw rod 412 is passed through the first pressing rod 49 and the second pressing rod 411, and the nut 413 is tightened to fit against the opposite sides of the first pressing rod 49 and the second pressing rod 411 to connect one end of the first pressing rod 49 and the second pressing rod 411.
[0071] Meanwhile, a guide plate 46 is provided at the upper end of the two sets of first pressing rods 49. A guide rail 47 is provided on the side of the guide plate 46 near the first pressing rods 49. Two sets of sliding blocks 48 are slidably installed on the guide rail 47. The two sets of sliding blocks 48 are fixed to the upper surface of the two sets of first pressing rods 49 respectively. An installation block 41 is fixedly installed on the side of the guide plate 46 away from the guide rail 47. The installation block 41 is concave and a lifting ring 42 is mounted on the installation block 41 with a bearing. One end of the lifting ring 42 passes through the installation block 41, and a second gear 43 is fixedly installed on one end of the lifting ring 42. At the same time, a second rack 414 corresponding to the second gear 43 is fixedly installed on the side of both sets of sliding blocks 48. The two sets of second racks 414 are arranged opposite to each other.
[0072] This allows the lifting ring 42 to be rotated, which in turn drives the second gear 43 to rotate. As the second gear 43 rotates, it can drive the two sets of second racks 414 to move closer or further apart, which is suitable for adjusting the spacing between the two sets of first pressing rods 49, and thus suitable for fixing the two vertical sides of weights 416 of different masses.
[0073] In order to fix the two sets of first pressure rods 49 after adjustment, such as Figure 6 As shown, a fixing part 44 is fixedly installed on the side of the lifting ring 42. The fixing part 44 is disposed in contact with the upper surface of the mounting block 41, and a wing bolt 45 is connected to the fixing part 44. The wing bolt 45 is adapted to pass through the fixing part 44 and be threaded to the upper surface of the mounting block 41.
[0074] In this application, anti-slip silicone pads can be provided at the contact positions between the two sets of first pressing rods 49 and the weights 416 to increase the clamping firmness of the two vertical sides of the weights 416.
[0075] In dynamic vertical fatigue testing of bicycle racks, the first fixing component 4 plays a crucial role in simulating the vertical loads encountered in actual use. First, the fixing box 415 is placed on the rear saddle of the bicycle rack, and the weight 416 is placed between the four sets of limiting blocks 417, achieving initial restriction on the two horizontal sides of the weight 416. Then, the connecting column 410 is manually held, causing the first and second holding rods 419 and 411 to be fitted onto the fixing box 415. After the screw rod 412 passes through the first and second holding rods, the nut 413 is tightened, completing the connection and fixation of one end of the holding rod.
[0076] To adjust the fixing force on the two vertical sides of the weights 416 of different masses, the lifting ring 42 can be rotated, causing the connected second gear 43 to rotate. Since the second gear 43 meshes with two sets of second racks 414, the rotation of the gear drives the two sets of second racks 414 to move closer or further apart, thereby synchronously adjusting the spacing of the first holding rod 49 fixed on the sliding block 48. After adjusting to the appropriate position, the lifting ring 42 and related components are fixed by tightening the wing bolts 45 on the fixing part 44 to prevent the holding rod from loosening or shifting during the test. Simultaneously, the anti-slip silicone pad at the contact point between the first holding rod 49 and the weights 416 further enhances the clamping firmness of the weights 416, ensuring that the weights 416 stably provide vertical holding force to the bicycle rack, guaranteeing the accuracy and reliability of the fatigue test.
[0077] To ensure the weight 416 is properly suspended and to prevent it from breaking or falling off during bicycle rack testing, such as... Figures 2-3 and Figure 6 As shown, a first hoisting assembly 3 is provided on one side of the first working box 1. The first hoisting assembly 3 includes a support rod 31 fixedly installed on one side of the first working box 1, and a hanger 32 is fixedly installed on the support rod 31. The hanger 32 is set perpendicular to the support rod 31, and a sliding support 33 is slidably installed on the hanger 32. A chain electric hoist 34 is fixedly installed on the side of the sliding support 33 near the first working box 1. The chain electric hoist 34 has a chain 35, and the chain 35 has a hook 36 adapted to the lifting ring 42.
[0078] The first lifting assembly 3 is designed to ensure the safety of bicycle rack testing. During operation, the support rod 31 is fixed to one side of the first work box 1, providing stable support for the entire assembly. The vertically positioned hanger 32 expands the lifting space. The sliding support 33 can slide flexibly on the hanger 32, 416 facilitating the adjustment of the horizontal position of the electric chain hoist 34, ensuring precise alignment with the weight fixing device at the rear of the bicycle rack. When the bicycle rack is fixed and ready to load the weight 416 for dynamic vertical fatigue testing, the electric chain hoist 34 is operated, causing the hook 36 at the end of its chain 35 to descend and precisely engage with the lifting ring 42 at the mounting block 41 on the fixed box 415. During testing, even if the bicycle rack breaks, the electric chain hoist 34, through the connection between the hook 36 and the lifting ring 42, and with the pull of the chain 35, will always maintain the weight 416 in a suspended state, preventing it from falling due to rack breakage and avoiding safety accidents. This also ensures the integrity and validity of the test data.
[0079] To simulate the effects of vibrations during real-world bicycle use, such as... Figure 4As shown, a first drive assembly 6 is installed inside the first working box 1. The first drive assembly 6 includes a base 61 fixedly installed inside the first working box 1, and a first motor 62 fixedly installed on the base 61. The first motor 62 has a rotating shaft 63. At the same time, two sets of first bearing seats 64 are fixedly installed on the base 61. An eccentric rod (not shown in the figure) is installed between the two sets of first bearing seats 64. One end of the eccentric rod is fixedly connected to the rotating shaft 63. An eccentric wheel 65 is movably sleeved on the eccentric rod. A pusher 66 is movably installed on the eccentric wheel 65. The pusher 66 has a support rod 67. The support rod 67 is movably inserted through the first working box 1. One end of the support rod 67 is fixedly connected to the horizontal rod 21.
[0080] The first drive assembly 6 simulates vibration through mechanical transmission. During operation, the first motor 62 is fixed to the base 61 inside the first working box 1, providing power to the entire assembly. When the first motor 62 starts, its shaft 63 begins to rotate. Since the shaft 63 is fixedly connected to one end of the eccentric rod, it drives the eccentric rod to rotate synchronously. The eccentric rod rotates stably under the support of two sets of first bearing seats 64. The eccentric wheel 65, movably sleeved on the eccentric rod, generates irregular circular motion due to the rotation of the eccentric rod. During this motion, the eccentric wheel 65 pushes the pusher 66, causing the support rod 67 to reciprocate along the vertical direction. One end of the support rod 67 is fixedly connected to the horizontal rod 21, thereby driving the bicycle rack fixed to the horizontal rod 21 to vibrate vertically at a certain frequency and amplitude. By adjusting the speed of the first motor 62, the rotational speed of the eccentric rod and the eccentric wheel 65 can be changed, thus adjusting the vibration frequency of the bicycle rack; the eccentricity of the eccentric wheel 65 determines the amplitude of the vibration.
[0081] To detect the vibration frequency of a bicycle rack, such as Figure 7 As shown, a first detection component 5 is installed on the first working box 1. The first detection component 5 includes a concave frame 51 fixedly installed on the first working box 1, and a first screw 52 is threadedly connected to the side of the concave frame 51. A turntable 53 is fixedly installed at one end of the first screw 52. A displacement block 54 is mounted on a bearing at one end of the first screw 52. The displacement block 54 is in contact with the upper surface of the first working box 1. At the same time, two sets of fixing bars 55 are fixedly installed on the first working box 1, and there is a certain distance between the two sets of fixing bars 55.
[0082] Meanwhile, a rotating part 56 is rotatably installed between one end of the two sets of fixed bars 55. The rotating part 56 has long grooves on both sides and a through groove is opened on the rotating part 56. The through groove is connected to the long groove. The long groove and the through groove are combined here to define a limiting groove. Meanwhile, a sliding protrusion 57 adapted to slide in the limiting groove is fixedly installed on the displacement block 54.
[0083] Furthermore, a support rod 59 is fixedly installed at one end of the rotating part 56, and a first acceleration sensor 510 is fixedly installed on the side of the support rod 59. The first acceleration sensor 510 has a contact rod that contacts the bicycle rack, so that the contact rod can be adjusted to contact the bicycle rack according to different sizes of bicycle racks.
[0084] The first detection component 5 is mainly used to detect the vibration frequency of the bicycle rack, and it can be flexibly adjusted according to different sizes of bicycle racks. The following is a detailed explanation of its working principle:
[0085] Since the first screw 52 is threadedly connected to the side of the concave frame 51, and a displacement block 54 is mounted on one end of it via a bearing, when the first screw 52 is rotated, according to the principle of threaded transmission, the rotational motion of the screw is converted into the linear motion of the displacement block 54. The displacement block 54 will move linearly along the upper surface of the first working box 1, and its direction of movement depends on the rotation direction of the first screw 52.
[0086] A sliding protrusion 57 is fixed on the displacement block 54. The sliding protrusion 57 is adapted to slide in the limiting groove (composed of a long groove and a through groove) of the rotating part 56. When the displacement block 54 moves, the sliding protrusion 57 slides in the limiting groove, thereby driving the rotating part 56 to rotate around the rotation point between the two sets of fixed bars 55.
[0087] When the rotating part 56 rotates, the support rod 59 fixed at one end of it also moves, thereby changing the position of the first acceleration sensor 510 installed on the side of the support rod 59. In this way, the contact rod of the first acceleration sensor 510 can be adjusted to a suitable position to make it contact the bicycle rack according to different sizes of bicycle racks.
[0088] When the first drive assembly 6 causes the bicycle rack to vibrate, the contact rod of the first accelerometer 510, which is in contact with the bicycle rack, vibrates accordingly. The first accelerometer 510 converts the vibration of the contact rod into an electrical signal, which is related to the acceleration of the vibration. By analyzing and processing this electrical signal, the vibration frequency of the bicycle rack can be calculated. This allows for accurate acquisition of the frequency information of the bicycle rack under simulated real-world vibration conditions, providing an important basis for evaluating the performance of the bicycle rack.
[0089] Meanwhile, a first PLC control system 11 is fixedly installed on the first work box 1. The first PLC control system 11 is used to control the operation of the above-mentioned drive equipment.
[0090] In summary, the dynamic vertical fatigue testing component of the present invention uses a first adjustment component 2 to adapt to bicycle racks of different sizes by sliding the first slider 22 and the second slider 24 on the horizontal bar 21, and is fixed with fasteners, making operation simple. The two ends of the rack are fixed to bolts 27 via connecting parts 26, and to fasteners via support bases 212, respectively, reducing the number of nuts 413 used and the number of operation steps.
[0091] Meanwhile, the first fixing component 4 fixes the weight 416 by rotating the lifting ring 42 to drive the second gear 43 and the second rack 414 to adjust the distance between the first pressing rod 49, and then fixes it with the wing bolt 45. This greatly simplifies the fixing process, significantly improves the efficiency of installing and replacing the shelf and the weight 416, and reduces labor intensity.
[0092] like Figure 1 , Figures 8-9 As shown, the dynamic horizontal fatigue testing assembly includes a second working box 7 disposed on one side of the first working box 1, and a second drive assembly 76 installed inside the second working box 7. The second drive assembly 76 includes a base 761 fixedly installed inside the second working box 7, a second motor 762 fixedly installed on the base 761, a long bar 763 fixedly installed at the output end of the second motor 762, and a connector 764 fixedly installed on the long bar 763 near one end.
[0093] Meanwhile, two sets of second bearing seats 767 are fixedly installed on the second working box 7. A crossbar 768 is rotatably installed on the two sets of second bearing seats 767, and a rocker arm 765 is fixedly installed on the side of the crossbar 768 near the second working box 7. The rocker arm 765 is movably inserted through the second working box 7, and a through slot larger than the width of the rocker arm 765 is opened on the second working box 7. The through slot provides rocker arm 765 with rocker space.
[0094] A groove 766 is provided at one end of the rocker arm 765, the connector 764 is located in the groove 766, and a limiting part is provided at one end of the connector 764 to prevent the connector 764 from coming out of the groove 766.
[0095] Furthermore, a second adjustment assembly 72 is installed on the second working box 7. The second adjustment assembly 72 has a similar structure to the first adjustment assembly 2. It should be noted that the second adjustment assembly 72 is different from the first adjustment assembly 2 in that the horizontal bar 21 of the second adjustment assembly 72 is defined as a crossbar 768. The crossbar 768 is mounted between two sets of second bearing seats 767, and the crossbar 768 is no longer supported by two sets of support columns 23.
[0096] Furthermore, the first slider 22 and the second slider 24 of the second adjustment component 72 are defined here as the third slider and the fourth slider (see reference). Figure 8 (From left to right), and a second adjustment component 72 is fixedly installed on the third and fourth sliders. The second adjustment component 72 and the first adjustment component 2 have similar structures and are used to fix the two ends of the bicycle rack.
[0097] Meanwhile, a second fixing component 77 is fixed on the rear saddle of the bicycle rack. The second fixing component 77 has a similar structure to the first fixing component 4. A second lifting component 73 is provided on one side of the second work box 7. The second lifting component 73 has a similar structure to the first lifting component 3. A second detection component 74 is installed on the second work box 7. The second detection component 74 has a similar structure to the first detection component 5. Here, the first acceleration sensor 510 of the second detection component 74 is defined as the second acceleration sensor. The detection end of the second acceleration sensor is located at the center of both ends of the bicycle rack. So when the long bar 763 rotates left and right, it can drive both ends of the bicycle rack to contact the detection end of the second acceleration sensor.
[0098] Furthermore, a second PLC control system 71 is fixedly installed on the second work box 7. The second PLC control system 71 is used to control the operation of the drive equipment of the dynamic horizontal fatigue testing component.
[0099] The working principle of the dynamic horizontal fatigue testing component is mainly as follows: the second drive component 76 provides power to drive the bicycle rack to swing horizontally; at the same time, the second adjustment component 72, the second fixing component 77, etc., are used to fix and adjust the rack; and the second detection component 74 detects relevant data of the rack.
[0100] The second motor 762 is fixedly mounted on the base 761 inside the second working box 7, serving as the power source for the entire dynamic horizontal fatigue test. When the second motor 762 starts, its output drives the long rod 763 to rotate. A connector 764, fixedly mounted near one end of the long rod 763, engages with a groove 766 at one end of the rocker arm 765, allowing the connector 764 to move within the groove 766. Because the limiting portion at one end of the connector 764 prevents it from dislodging from the groove 766, when the long rod 763 rotates, it drives the rocker arm 765 to swing within the groove on the second working box 7 via the connector 764. The swinging of the rocker arm 765 then drives the crossbar 768 to rotate between the two sets of second bearing seats 767.
[0101] The second adjustment assembly 72 is structurally similar to the first adjustment assembly 2, with its horizontal bar 21 defined as a crossbar 768. The crossbar 768 bearings are installed between two sets of second bearing seats 767. The third and fourth sliders (equivalent to the first slider 22 and second slider 24 in the first adjustment assembly 2) can slide on the crossbar 768, and the two ends of the bicycle rack can be fixed by the structure set on the third and fourth sliders (similar to the first adjustment assembly 2). Before fixing, the positions of the third and fourth sliders on the crossbar 768 can be adjusted according to the size of the bicycle rack to match the distance between the two ends of the rack, and they can be fixed by a similar fastening method to complete the initial positioning and installation of the rack. At the same time, the second fixing assembly 77 fixed on the rear frame of the bicycle rack is structurally similar to the first fixing assembly 4, which can further fix the rear saddle of the rack, and can fix and adjust the weights 416, etc. placed on it through similar operations, providing the constraints and loads required for horizontal testing of the rack.
[0102] The second lifting assembly 73 is structurally similar to the first lifting assembly 3 and is installed on one side of the second working box 7. During the test, when it is necessary to lift heavy objects such as weights 416 on the shelf, or in case of unexpected situations such as the shelf breaking, the second lifting assembly 73 can use a similar working method, such as a chain electric hoist 34, to hold the heavy objects, prevent them from falling, ensure the safety of the test process, and at the same time ensure the integrity and validity of the test data.
[0103] The second detection component 74 is structurally similar to the first detection component 5, with the detection end of the second accelerometer sensor located at the center of both ends of the bicycle rack. When the long bar 763 rotates left and right, causing the crossbar 768 to rotate, and thus causing both ends of the bicycle rack to swing and contact the detection end of the second accelerometer sensor, the second accelerometer sensor can convert the vibration of the rack into an electrical signal. By analyzing and processing these electrical signals, the vibration frequency, acceleration, and other relevant data of the bicycle rack in the horizontal direction can be calculated, thereby evaluating the performance of the rack under horizontal dynamic loads and determining whether it meets relevant standards and requirements.
[0104] Example 2: To perform a static level test on a bicycle rack in order to test various aspects of its performance, such as... Figure 1 and Figures 9-10 As shown, a static level detection component 8 is provided on one side of the second working box 7. The static level detection component 8 includes a third working box 81 provided on one side of the second working box 7, and a base 82 is fixedly installed on the third working box 81. A bicycle rack body 83 is fixedly installed on the base 82 by multiple sets of bolts, and a first moving unit is installed on the second working box 7.
[0105] The first moving unit includes a concave frame 84 fixedly mounted on the second working box 7 and located on one side of the base 82. A lead screw 85 is bearing mounted on the concave frame 84, and a rotating part 87 is fixedly mounted on one end of the lead screw 85. Guide posts 86 are fixedly mounted on the concave frame 84 and located on both sides of the lead screw 85. A slide 88 is threadedly connected to the lead screw 85. The slide 88 is movably sleeved on both sets of guide posts 86. A right-angle frame 89 is fixedly mounted on the side of the slide 88, and a second moving unit is fixedly mounted on the right-angle frame 89.
[0106] The second moving unit includes a slotted frame 810 fixedly mounted on the side of the right-angle frame 89 away from the concave frame 84, and a second screw 811 bearingly mounted on the slotted frame 810. Limiting rods 812 are fixedly mounted on the slotted frame 810 at both sides of the second screw 811. A slide 813 is threadedly connected to the second screw 811. The slide 813 is movably sleeved on both sets of limiting rods 812. A digital push-pull force gauge 814 is fixedly mounted on the slide 813. The digital push-pull force gauge 814 has a contact head 815, which is adapted to contact the bicycle rack body 83.
[0107] Meanwhile, a digital displacement measuring ruler 816 is fixedly installed on the slotted frame 810. A reading head 817 is slidably installed on the digital displacement measuring ruler 816, and the reading head 817 is connected to the digital push-pull force gauge 814.
[0108] The static level detection component 8 works by adjusting the position of the digital push-pull force gauge 814 through the first and second moving units, causing it to contact the bicycle rack body 83 and apply a horizontal force. Simultaneously, a digital displacement measuring scale 816 measures the displacement, thereby detecting the performance of the bicycle rack in a static level state, as detailed below:
[0109] The bicycle rack body 83 is fixedly installed on the base 82 on the third work box 81 by multiple sets of bolts, ensuring the stability of the rack position during the inspection process and providing a reliable foundation for subsequent inspections.
[0110] The concave frame 84 is fixedly mounted on the second working box 7 and located on one side of the base 82. The lead screw 85 is bearing-mounted on the concave frame 84, and the guide posts 86 are fixedly mounted on both sides of the lead screw 85. When the lead screw 85 is rotated, since the slide 88 is threadedly connected to the lead screw 85 and simultaneously movably sleeved on the two sets of guide posts 86, according to the principle of threaded transmission, the slide 88 will move linearly along the axial direction of the lead screw 85 on the guide posts 86. This allows the slide 88 to move closer to or further away from the bicycle rack body 83 in the horizontal direction, realizing the initial horizontal position adjustment of the digital push-pull force gauge 814.
[0111] The slotted frame 810 is fixedly mounted on the right-angle frame 89 on the side away from the concave frame 84. The second screw 811 is bearing-mounted on the slotted frame 810, and the limiting rods 812 are fixedly mounted on both sides of the second screw 811. The slide table 813 is threadedly connected to the second screw 811 and simultaneously movably sleeved on the two sets of limiting rods 812. When the second screw 811 is rotated, the slide table 813 will move linearly along the axial direction of the second screw 811 on the limiting rods 812. Through this operation, the position of the digital push-pull force gauge 814 perpendicular to the moving direction of the first moving unit can be further precisely adjusted, so that the contact head 815 of the digital push-pull force gauge 814 accurately contacts the bicycle rack body 83.
[0112] After the digital push-pull force gauge 814 comes into contact with the bicycle rack body 83, it can apply a horizontal force to the rack and display the magnitude of the applied force in real time. At the same time, the reading head 817 on the digital displacement measuring ruler 816 is connected to the digital push-pull force gauge 814. When the digital push-pull force gauge 814 applies a force to the rack and causes the rack to displace, the reading head 817 will slide on the digital displacement measuring ruler 816 to measure the amount of rack displacement, which is then displayed on the digital displacement measuring ruler 816.
[0113] By analyzing data such as the magnitude of the force displayed by the digital push-pull force gauge 814 and the displacement measured by the digital displacement measuring ruler 816, the strength, stiffness, and other performance aspects of the bicycle rack in a static horizontal state can be evaluated, and it can be determined whether it meets the relevant quality standards and usage requirements.
[0114] Example 3: The fatigue testing steps for bicycle racks described above are as follows:
[0115] Step 1: Adjust the first slider 22 and the second slider 24 to fit the shelf at the position of the horizontal bar 21, fix the slider with fasteners, fix one end of the shelf through the connecting part 26 and the bolt 27, start the forward and reverse motor 210 of the displacement unit to drive the support base 212 to move and fix the other end, and complete the installation of the shelf in the dynamic vertical fatigue test component.
[0116] Step 2: Place the fixing box 415 and the weight 416 on the rear saddle of the shelf, connect the first and second pressure rods, rotate the lifting ring 42 to adjust the spacing, tighten the wing bolt 45 to fix it, and check the anti-slip silicone pad to ensure that it is clamped.
[0117] Step 3: Operate the electric chain hoist 34 to engage the hook 36 with the lifting ring 42; start the first motor 62 to drive the shelf to vibrate vertically, adjust the speed and eccentricity setting parameters; adjust the position of the first acceleration sensor 510, start testing and record the vibration frequency.
[0118] Step 4: Install the shelf onto the dynamic horizontal fatigue testing assembly, adjust and fix the third and fourth sliders to fit the shelf, and install the adjustment weight 416; start the second motor 762 to make the shelf swing horizontally, activate the second lifting assembly 73 for protection, and adjust the detection data of the second acceleration sensor.
[0119] Step 5: Fix the shelf to the base 82 of the static level detection component 8, adjust the position of the digital push-pull force gauge 814 to contact the shelf by using the lead screw 85 and the second screw 811, apply a horizontal force and record the displacement, and analyze the data to evaluate the static performance of the shelf.
[0120] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A bicycle rack inspection device, comprising a dynamic vertical fatigue testing component, characterized in that: The dynamic vertical fatigue testing assembly includes a first working box (1), a first adjusting assembly (2) for supporting and fixing the bicycle rack, and a first fixing assembly (4) for limiting the rear frame of the bicycle rack. The first adjusting assembly (2) is installed on the first working box (1). The first adjusting assembly (2) includes a first fixing unit for fixing one end of the bicycle rack and a displacement unit for fixing the other end of the bicycle rack. The first fixing unit includes a horizontal rod (21) located at the upper end of the first working box (1). A first slider (22) and a second slider (24) are slidably mounted on the horizontal rod (21). Both the first slider (22) and the second slider (24) can be fixed on the horizontal rod (21) by fasteners. Two sets of support columns (23) are installed on the first working box (1) to support the horizontal rod (21). The second slider (24) is equipped with two sets of connecting parts (26). One end of the bicycle rack is adapted to overlap the two sets of connecting parts (26). Both sets of connecting parts (26) are threaded with bolts (27). The bolts (27) are adapted to pass through one end of the bicycle rack and be threaded to the connecting parts (26). The displacement unit is mounted on the first slider (22). The displacement unit includes a recessed rod (28) mounted on the first slider (22). A first sliding seat (29) is slidably mounted on the recessed rod (28). A forward and reverse motor (210) is mounted on the side of the first sliding seat (29). A first gear (211) is mounted on the output end of the forward and reverse motor (210). The first gear (211) is located inside the first sliding seat (29). A space for storing the first gear (211) is opened inside the first sliding seat (29). A first rack (213) that meshes with the first gear (211) is installed inside the recessed rod (28). The first rack (213) is movably inserted through the first sliding seat (29). A support seat (212) is mounted on the first sliding seat (29). The support seat (212) is used to support the other end of the bicycle rack. The other end of the bicycle rack can be fixed to the support seat (212) by fasteners. The first fixing component (4) includes a fixing box (415) placed on the rear saddle of the bicycle rack and a limiting unit sleeved on the fixing box (415). The fixing box (415) has four sets of limiting blocks (417) arranged in pairs opposite each other, and a weight (416) is placed between the four sets of limiting blocks (417). The weight (416) is adapted to be limited on two horizontal sides by the four sets of limiting blocks (417). The limiting unit includes two sets of first pressing rods (49) arranged horizontally opposite each other, and the first pressing rods (49) are connected to second pressing rods (411) through connecting posts (410). The two ends of the connecting posts (410) are respectively connected to the first pressing rods (49) and the second pressing rods (411), and a screw head rod (412) is connected to the other end of the first pressing rods (49) and the second pressing rods (411). The two ends of the screw head rod (412) are threaded with nuts (413). Two sets of first pressing rods (49) are provided with guide plates (46) at their upper ends. A guide rail (47) is provided on the side of the guide plate (46) near the first pressing rod (49). Two sets of sliding blocks (48) are slidably mounted on the guide rail (47). The two sets of sliding blocks (48) are respectively fixed to the upper surface of the two sets of first pressing rods (49). A mounting block (41) is fixedly mounted on the side of the guide plate (46) away from the guide rail (47). The mounting block (41) is concave, and a lifting ring (42) is mounted on the mounting block (41) with a bearing. One end of the lifting ring (42) passes through the mounting block (41). The mounting block (41) has a second gear (43) fixedly installed at one end of the lifting ring (42), and a second rack (414) meshing with the second gear (43) is fixedly installed on the side of both sets of sliding blocks (48). The two sets of second racks (414) are arranged opposite to each other. A fixing part (44) is fixedly installed on the side of the lifting ring (42). The fixing part (44) is attached to the upper surface of the mounting block (41), and a wing bolt (45) is connected to the fixing part (44). The wing bolt (45) is adapted to pass through the fixing part (44) and be threaded to the upper surface of the mounting block (41).
2. The bicycle rack inspection device according to claim 1, characterized in that: Anti-slip silicone pads are provided at the contact positions between the first pressing rod (49) and the weight in both sets.
3. The bicycle rack inspection device according to claim 2, characterized in that: A first hoisting assembly (3) is provided on one side of the first work box (1). The first hoisting assembly (3) includes a support rod (31) installed on one side of the first work box (1). A hanger (32) is installed on the support rod (31). The hanger (32) is set perpendicular to the support rod (31). A sliding support (33) is slidably installed on the hanger (32). A chain electric hoist (34) is installed on the side of the sliding support (33) near the first work box (1). The chain electric hoist (34) has a chain (35). The chain (35) has a hook (36) adapted to the lifting ring (42).
4. The bicycle rack inspection device according to claim 3, characterized in that: The first working box (1) is equipped with a first drive assembly (6). The first drive assembly (6) includes a base (61) installed inside the first working box (1). A first motor (62) is installed on the base (61). The first motor (62) has a rotating shaft (63). Two sets of first bearing seats (64) are installed on the base (61). An eccentric rod is installed between the two sets of first bearing seats (64). One end of the eccentric rod is fixedly connected to the rotating shaft (63). An eccentric wheel (65) is movably sleeved on the eccentric rod. A pushing part (66) is movably installed on the eccentric wheel (65). The pushing part (66) has a support rod (67). The support rod (67) is movably inserted through the first working box (1). One end of the support rod (67) is fixedly connected to the horizontal rod (21).
5. The bicycle rack inspection device according to claim 4, characterized in that: A first detection component (5) is installed on the first work box (1). The first detection component (5) includes a concave frame (51) installed on the first work box (1). A first screw (52) is threadedly connected to the side of the concave frame (51). A turntable (53) is fixedly installed at one end of the first screw (52). A displacement block (54) is mounted on the bearing at one end of the first screw (52). The displacement block (54) is attached to the upper surface of the first work box (1). Two sets of fixing bars (55) are installed on the first work box (1). There is a certain distance between the two sets of fixing bars (55). A rotating part (56) is rotatably installed between one end of the two sets of fixed bars (55). The rotating part (56) has long grooves on both sides. A through groove is opened on the rotating part (56). The through groove is connected to the long groove. The long groove and the through groove are combined to define a limiting groove. A sliding protrusion (57) that is adapted to slide in the limiting groove is installed on the displacement block (54). A support rod (59) is installed at one end of the rotating part (56), and a first acceleration sensor (510) is installed on the side of the support rod (59). The first acceleration sensor (510) has a contact rod.
6. The bicycle rack inspection device according to claim 5, characterized in that: A dynamic horizontal fatigue testing component is provided on one side of the first working box (1). The dynamic horizontal fatigue testing component includes a second working box (7) provided on one side of the first working box (1). A second drive component (76) is installed inside the second working box (7). The second drive component (76) includes a platform (761) installed inside the second working box (7). A second motor (762) is installed on the platform (761). A long rod (763) is installed at the output end of the second motor (762). A connector (764) is installed on the long rod (763) near one end. Two sets of second bearing seats (767) are installed on the second working box (7). A crossbar (768) is rotatably installed on the two sets of second bearing seats (767). A rocker arm (765) is installed on the side of the crossbar (768) near the second working box (7). The rocker arm (765) is movably inserted through the second working box (7). A through groove larger than the width of the rocker arm (765) is opened on the second working box (7). The through groove provides rocker arm (765) with rocker arm (765) rocker arm (765) rocker arm (766) rocker arm (765) rocker arm (766) rocker arm (764 ... The second working box (7) is equipped with a second adjustment assembly (72). The second adjustment assembly (72) is different from the first adjustment assembly (2) in that the horizontal bar (21) of the second adjustment assembly (72) is defined as a crossbar (768). The crossbar (768) is bearing installed between two sets of second bearing seats (767). The crossbar (768) is no longer supported by the two sets of support columns (23). The first slider (22) and the second slider (24) of the second adjustment assembly (72) are defined as the third slider and the fourth slider, and the second adjustment assembly (72) is fixedly installed on the third slider and the fourth slider. The second adjustment assembly (72) is used to fix the two ends of the bicycle rack. The bicycle rack has a second fixing component (77) fixed on the rear saddle. The second fixing component (77) and the first fixing component (4) have the same structure. A second lifting component (73) is provided on one side of the second work box (7). The second lifting component (73) and the first lifting component (3) have the same structure. A second detection component (74) is installed on the second work box (7). The second detection component (74) and the first detection component (5) have the same structure. The first acceleration sensor (510) of the second detection component (74) is defined as the second acceleration sensor. The detection end of the second acceleration sensor is located at the center of both sides of the bicycle rack.
7. The bicycle rack inspection device according to claim 6, characterized in that: A static level detection component (8) is provided on one side of the second work box (7). The static level detection component (8) includes a third work box (81) provided on one side of the second work box (7). A base (82) is installed on the third work box (81). A bicycle rack body (83) is fixedly installed on the base (82) by multiple sets of bolts. A first moving unit is installed on the second work box (7). The first moving unit includes a concave frame (84) mounted on the second working box (7) and located on one side of the base (82). A lead screw (85) is mounted on the concave frame (84) with a bearing. A rotating part (87) is mounted on one end of the lead screw (85). Guide posts (86) are mounted on both sides of the lead screw (85) on the concave frame (84). A slide (88) is threaded onto the lead screw (85). The slide (88) is movably sleeved on both sets of guide posts (86). A right-angle frame (89) is mounted on the side of the slide (88). A second moving unit is mounted on the right-angle frame (89). The second moving unit includes a slotted frame (810) mounted on the side of the right-angle frame (89) away from the concave frame (84). A second screw (811) is mounted on the slotted frame (810) with bearings. Limiting rods (812) are mounted on the slotted frame (810) at both sides of the second screw (811). A slide (813) is threaded onto the second screw (811). The slide (813) is movably sleeved on the two sets of limiting rods (812). A digital push-pull force gauge (814) is mounted on the slide (813). The digital push-pull force gauge (814) has a contact head (815) adapted to contact the bicycle rack body (83). A digital displacement measuring ruler (816) is installed on the slotted frame (810), and a reading head (817) is slidably installed on the digital displacement measuring ruler (816). The reading head (817) is connected to the digital push-pull force gauge (814).
8. A method for inspecting bicycle racks using the bicycle rack inspection equipment described in claim 7, characterized in that: The bicycle rack inspection process steps are as follows: Step 1: Adjust the first slider (22) and the second slider (24) to match the rack at the position of the horizontal bar (21), fix the slider with fasteners, fix one end of the rack through the connecting part (26) and bolt (27), start the forward and reverse motor (210) of the displacement unit to drive the support base (212) to move and fix the other end, and complete the installation of the rack in the dynamic vertical fatigue test component; Step 2: Place the fixing box (415) and weight (416) on the back saddle of the shelf, connect the first and second pressure rods, rotate the lifting ring (42) to adjust the spacing, tighten the wing bolt (45) to fix it, and check the anti-slip silicone pad to ensure that it is clamped. Step 3: Operate the electric chain hoist (34) to engage the hook (36) with the lifting ring (42); start the first motor (62) to drive the shelf to vibrate vertically, and adjust the speed and eccentricity setting parameters; adjust the position of the first acceleration sensor (510), start the test and record the vibration frequency; Step 4: Install the shelf onto the dynamic horizontal fatigue test assembly, adjust the third and fourth sliders to fit the shelf and fix them, and install the adjustment weights (416); start the second motor (762) to make the shelf swing horizontally, activate the second lifting assembly (73) for protection, and adjust the detection data of the second acceleration sensor; Step 5: Fix the shelf to the base (82) of the static level detection component (8), adjust the position of the digital push-pull force gauge (814) to contact the shelf through the lead screw (85) and the second screw (811), apply a horizontal force and record the displacement, and analyze the data to evaluate the static performance of the shelf.