Bicycle shelf inspection process and equipment thereof

Abstract

The invention discloses a bicycle shelf inspection process and equipment thereof, and belongs to the field of bicycle shelf inspection. Comprising a dynamic vertical fatigue test assembly, and the dynamic vertical fatigue test assembly comprises a first fixing unit used for fixing one end of a bicycle shelf, a displacement unit used for fixing the other end of the bicycle shelf, and a first fixing assembly used for limiting a rear frame of the bicycle shelf. The first fixing assembly comprises a fixing box, two groups of first pressing rods, two groups of second pressing rods and a limiting unit, the fixing box is suitable for placing a weight so as to balance the weight of a rear frame of the bicycle shelf, and the first pressing rods and the second pressing rods are used for holding and limiting the weight so as to be matched with the limiting unit to change the distance between the two groups of first pressing rods; therefore, the weight can be assembled quickly. According to the bicycle shelf inspection process and equipment thereof, the assembly operation process is simplified, the labor intensity is reduced, the test efficiency is improved, the stability and accuracy of the vertical load are ensured, and the reliability of the fatigue test result is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycle rack inspection, and in particular to a bicycle rack inspection process and equipment thereof. Background Art

[0002] In the fields of transportation and outdoor sports, bicycles continue to expand their application scenarios due to their environmentally friendly, flexible and convenient features. As core components for carrying goods, bicycle racks must withstand complex external forces from various directions for long periods of time in scenarios such as daily shopping and long-distance cycling to carry equipment. If a rack deforms or breaks due to quality issues, it can not only cause goods to fall, but can also cause riders to lose their balance and lead to serious safety accidents. Therefore, establishing a scientific and comprehensive inspection process system and equipping it with efficient adaptation equipment are key to ensuring the quality and reliability of bicycle racks.

[0003] The quality inspection process of bicycle racks covers key links such as dynamic vertical fatigue test, dynamic horizontal fatigue test and static horizontal fatigue test, aiming to comprehensively evaluate the durability and reliability of bicycle racks under different stress conditions.

[0004] The dynamic vertical fatigue test follows the following procedure: First, two sets of fixtures are used to securely fixate each end of the bicycle rack. This ensures the rack's stable position during the test and prevents displacement from affecting the accuracy of the test results. For the bicycle rack's rear saddle, two sets of support bars and screw rods are used to secure weights in place via nuts. This applies a vertical compressive force to the bicycle rack, simulating the vertical loads it would experience in actual use.

[0005] After completing the above preparations, the vibration equipment was activated, vibrating the bicycle rack vertically at a frequency of 7 Hz, with an amplitude of 8 mm, for 100,000 consecutive cycles. After the entire vibration test, the bicycle rack was carefully inspected for damage such as cracks or visible cracks to determine whether it had passed the dynamic vertical fatigue test.

[0006] However, this existing fixing method has significant shortcomings. When replacing and reinstalling an already inspected bicycle rack, multiple sets of nuts must be turned sequentially. This operation not only consumes a significant amount of time and effort, resulting in low testing efficiency, but the cumbersome installation and removal process also increases the operator's workload, hindering efficient bicycle rack inspection. Therefore, a bicycle rack inspection process and equipment are needed.

[0007] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute prior art. Summary of the Invention

[0008] The embodiment of the present invention provides a bicycle rack inspection process and equipment thereof to solve the problem that the existing bicycle rack inspection and fixing method requires one-to-one operation of multiple groups of nuts and knobs, which is time-consuming and labor-intensive, inefficient, and labor-intensive, and is not conducive to efficient inspection.

[0009] The embodiment of the present invention adopts the following technical solution: a bicycle rack inspection device. The device includes a dynamic vertical fatigue test assembly, the dynamic vertical fatigue test assembly 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 rear rack 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 suitable for placing weights for counterweighting the rear rack of the bicycle rack. The first holding rods and the second holding rods are used to hold and limit the weights. A certain gap is formed between the first holding rods and the second holding rods to cooperate with the limiting unit to change the distance between the two sets of first holding rods, thereby realizing the function of quickly assembling the counterweights.

[0010] Furthermore, the dynamic vertical fatigue test assembly also includes a first working box, on which a first adjustment assembly 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 groups of limiting blocks arranged relatively to each other, weights are placed between the four groups of limiting blocks, the limiting unit is sleeved on the fixing box, two groups of the first holding rods are arranged horizontally relatively to each other, the first holding rod is connected to the second holding rod through a connecting column, the two ends of the connecting column are respectively connected to the first holding rod and the second holding rod, the other ends of the first holding rod and the second holding rod are connected to a screw rod, the two ends of the screw rod are threadedly connected to nuts, and the contact positions of the two groups of the first holding rods and the weights are provided with anti-slip silicone pads; A guide plate is provided at the upper end of the two groups of first holding rods, a guide rail is provided on the side of the guide plate close to the first holding rod, two groups of sliding blocks are slidably mounted on the guide rail, the two groups of sliding blocks are respectively fixed to the two groups of first holding rods, a mounting block is installed on the guide plate, a lifting ring is installed on the bearing of the mounting block, one end of the lifting ring passes through the mounting block, and a second gear is installed on one end of the lifting ring, and a second rack connected to the second gear is installed on the side of the two groups of sliding blocks, and the two groups of second racks are arranged opposite to each other; A fixing portion is installed on the side of the hanging ring, the fixing portion is arranged to fit the upper surface of the mounting block, and a butterfly bolt is connected to the fixing portion.

[0011] Furthermore, the first fixing unit includes a horizontal rod at the upper end of the first working box, a first slider and a second slider are slidably mounted on the horizontal rod, the first slider and the second slider can be fixed to the horizontal rod by fasteners, and the first working box is equipped with two sets of support columns for supporting the horizontal rod; Two groups of connecting parts are installed on the second sliding block, and one end of the bicycle rack is suitable for overlapping the two groups of connecting parts. Bolts are threadedly connected to the two groups of connecting parts, and the bolts are suitable for passing through one end of the bicycle rack and being threadedly connected to the connecting parts.

[0012] Furthermore, the displacement unit is installed on the first slider, and the displacement unit includes a concave rod installed on the first slider, a first sliding seat is slidably installed on the concave rod, a forward and reverse motor is installed on the side of the first sliding seat, and a first gear is installed on the output end of the forward and reverse motor. The first gear is in the first sliding seat, and a space for storing the first gear is opened in the first sliding seat. A first rack meshing with the first gear is installed in the concave rod, and the first rack moves through the first sliding seat. A support seat is installed on the first sliding seat, and 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.

[0013] Furthermore, a first lifting assembly is provided on one side of the first working box, and the first lifting assembly includes a support rod installed on one side of the first working box, a hanger is installed on the support rod, and the hanger is arranged perpendicular to the support rod. A sliding support is slidably installed on the hanger, and a chain electric hoist is installed on the side of the sliding support close to the first working box. The chain electric hoist has a chain, and the chain has a hook adapted for use with the lifting ring.

[0014] Furthermore, a first driving assembly is installed inside the first working box, and the first driving assembly includes a base installed inside the first working box, a first motor is installed on the base, the first motor has a rotating shaft, two groups of first bearing seats are installed on the base, an eccentric rod is installed on the bearings between the two groups of first bearing seats, one end of the eccentric rod is fixedly connected to the rotating shaft, an eccentric wheel is movably sleeved on the eccentric rod, a pushing part is movably installed on the eccentric wheel, the pushing part has a support rod, the support rod movably runs through the first working box setting, and one end of the support rod is fixedly connected to the horizontal rod.

[0015] Furthermore, a first detection assembly is installed on the first working box, and the first detection assembly includes a concave frame installed on the first working box, a first screw is threadedly connected to the side of the concave frame, a turntable is fixedly installed on one end of the first screw, a displacement block is installed on a bearing at one end of the first screw, and the displacement block is attached to the upper surface of the first working box, and two groups of fixed bars are installed on the first working box, and a certain distance is left between the two groups of fixed bars; A rotating part is rotatably installed between one end of the two groups of fixed bars, and the rotating part has long grooves on both sides. A through groove is opened on the rotating part, and the through groove is connected to the long groove. The combination of the long groove and the through groove is defined as a limiting groove, and a sliding block adapted to slide in the limiting groove is installed on the displacement block; A support rod is installed at one end of the rotating part, a first acceleration sensor is installed on a side surface of the support rod, and the first acceleration sensor has a contact rod.

[0016] Furthermore, a dynamic horizontal fatigue test assembly is provided on one side of the first working box, and the dynamic horizontal fatigue test assembly includes a second working box provided on one side of the first working box, a second driving assembly is installed in the second working box, and the second driving assembly includes a pedestal installed in the second working box, a second motor is installed on the pedestal, and a long rod is installed at the output end of the second motor, and a connector is installed near one end of the long rod; Two groups of second bearing seats are installed on the second working box, and the two groups of second bearing seats are rotatably installed with a cross bar, and a rocking bar is installed on the side of the cross bar close to the second working box. The rocking bar movably runs through the second working box. A through slot larger than the width of the rocking bar is opened on the second working box, and the through slot provides a rocking space for the rocking bar. A waist groove is opened at one end of the rocking bar, and the connecting piece is located in the waist groove. A limiting part is provided at one end of the connecting piece, and the limiting part is used to prevent the connecting piece from falling out of the waist groove; A second adjustment assembly is installed on the second working box. The second adjustment assembly and the first adjustment assembly have similar structures. The second adjustment assembly differs from the first adjustment assembly in that the horizontal rod of the second adjustment assembly is defined as a crossbar, and the crossbar bearing is installed between the two sets of the second bearing seats. The crossbar is no longer supported by the two sets of support columns. The first slider and the second slider of the second adjustment assembly are defined as the third slider and the fourth slider. The second adjustment assembly is fixedly mounted on the third slider and the fourth slider. The second adjustment assembly and the first adjustment assembly have similar structures and are used to fix the two ends of the bicycle rack. A second fixing assembly is fixed on the rear saddle of the bicycle rack, and the second fixing assembly has a similar structure to the first fixing assembly. A second hoisting assembly is provided on one side of the second working box, and the second hoisting assembly has a similar structure to the first hoisting assembly. A second detection assembly is installed on the second working box, and the second detection assembly has a similar structure to the first detection assembly. The first acceleration sensor of the second detection assembly is defined as a second acceleration sensor, and the detection end of the second acceleration sensor is located at the center position of both side ends of the bicycle rack.

[0017] Furthermore, a static level detection assembly is provided on one side of the second working box, and the static level detection assembly includes a third working box provided on one side of the second working box, a base is installed on the third working box, a bicycle rack body is fixedly installed on the base by multiple groups of bolts, and a first moving unit is installed on the second working box; The first movable unit includes a concave frame mounted on the second working box and located at one side of the base, a screw rod mounted on a bearing on the concave frame, a rotating member mounted on one end of the screw rod, guide posts mounted on both sides of the screw rod, a slide seat threadedly connected to the screw rod, the slide seat movably sleeved on two groups of the guide posts, a right-angle frame mounted on the side of the slide seat, and a second movable unit mounted on the right-angle frame; The second moving unit includes a channel frame mounted on a side of the right-angle frame away from the concave frame, a second screw rod is mounted on a bearing of the channel frame, and limiting rods are mounted on both sides of the channel frame at the same time. A slide is threadedly connected to the second screw rod, and the slide rod is movably connected to the two sets of limiting rods. A digital push-pull force gauge is mounted on the slide rod, and the digital push-pull force gauge has a contact head, and the contact head is suitable for contacting the bicycle rack body; A digital displacement measuring ruler is installed on the trough-shaped frame, a reading head is slidably installed on the digital displacement measuring ruler, and the reading head is connected to the digital push-pull dynamometer.

[0018] Furthermore, the bicycle rack inspection process steps are as follows: Step 1: Adjust the first and second sliders to fit the shelf on the horizontal rod, fix the sliders with fasteners, fix one end of the shelf with the connecting part and bolts, start the forward and reverse motors of the displacement unit to drive the support base to move and then fix the other end, completing the installation of the shelf in the dynamic vertical fatigue test assembly; Step 2: Place the fixed box and weights on the rear saddle of the shelf, connect the first and second holding rods, rotate the lifting ring to adjust the spacing, tighten the butterfly bolts to fix, and check the non-slip silicone pad to ensure it is clamped; 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, adjust the speed and eccentricity setting parameters; adjust the position of the first acceleration sensor, start testing and record the vibration frequency; Step 4: Install the shelf to the dynamic horizontal fatigue test assembly, adjust the third and fourth sliders to fit the shelf and secure them, and install the adjustment weights; start the second motor to make the shelf swing horizontally, enable the second lifting assembly protection, and adjust the second acceleration sensor detection data; Step 5: Fix the shelf to the base of the static level detection component. Use the lead screw and the second screw to adjust the position of the digital push-pull force gauge so that it contacts the shelf. Apply horizontal force and record the displacement. Analyze the data to evaluate the static performance of the shelf.

[0019] The at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects: A bicycle rack inspection process and equipment thereof comprises the following steps: firstly placing a fixing box on the rear saddle of the rack, limiting the horizontal side of the weights with a limiting block, then manually operating a connecting column to allow a holding rod to be sleeved onto the fixing box, and fixing it with a screw rod and a nut. When adjusting the fixing force of weights of different masses, a rotating lifting ring drives a second gear, and changes the spacing of the first holding rod through meshing transmission with a second rack. After adjustment, the lifting ring is fixed with a butterfly bolt, and a non-slip silicone pad enhances the clamping force. Compared with the cumbersome, inefficient and labor-intensive fixing method using multiple sets of nuts and knobs, this method ensures the stability and accuracy of the vertical load on the rack during the test, and guarantees the reliability of the fatigue test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] In the attached figure: Figure 1 This is an overall schematic diagram of a bicycle rack inspection process and equipment in this application; Figure 2 for Figure 1 Schematic diagram of the first adjustment component and the first lifting component; Figure 3 for Figure 2 Schematic diagram on the back; Figure 4 for Figure 2 Schematic diagram of the internal structure; Figure 5 for Figure 3 A magnified view of point A; Figure 6 for Figure 2 Enlarged view of point B; Figure 7 for Figure 2 Enlarged view of point C; Figure 8 for Figure 1 Schematic diagram of the horizontal fatigue test component structure; Figure 9 for Figure 8 Schematic diagram of the internal structure; Figure 10 for Figure 1 Schematic diagram of the static level detection component structure; Figure 11 for Figure 10 Enlarged view of point D; Reference numerals: 1. First working box; 11. First PLC control system; 2. First adjustment assembly; 21. Horizontal rod; 22. First slider; 23. Support column; 24. Second slider; 26. Connecting portion; 27. Bolt member; 28. Concave rod; 29. ​​First sliding seat; 210. Forward and reverse motor; 211. First gear; 212. Support seat; 213. First rack; 3. First lifting assembly; 31. Support rod; 32. Hanger; 33. Sliding support; 34. Electric chain hoist; 35. Chain; 36. Hook; 4. First fixing assembly; 41. Mounting block; 42. Lifting ring; 43. Second gear; 44. Fixing portion; 45. Butterfly bolt; 46. Guide plate; 47. Guide rail; 48. Sliding block; 49. First holding rod; 410. Connecting column; 411. Second holding rod; 412. Screw rod; 413. Nut; 414. Second rack; 415. Fixing box; 416. Weight; 417. Limiting block; 5. First detection assembly; 51. Concave frame; 52. First screw; 53. Turntable; 54. Displacement block; 55. Fixed bar; 56. Rotating portion; 57. Sliding block; 59. Support rod; 510. First acceleration sensor; 6. First drive assembly; 61. Base; 62. First motor; 63. Rotating shaft; 64. First bearing seat; 65. Eccentric wheel; 66. Pushing part; 67. Support rod; 7. Second working box; 71. Second PLC control system; 72. Second adjustment assembly; 73. Second lifting assembly; 74. Second detection assembly; 76. Second drive assembly; 761. Base; 762. Second motor; 763. Long bar; 764. Connector; 765. Rocker arm; 766. Waist groove; 767. Second bearing seat; 768. Crossbar; 77. Second fixing assembly; 8. Static level detection assembly; 81. Third working box; 82. Base; 83. Bicycle rack body; 84. Concave frame; 85. Screw; 86. Guide column; 87. Rotating part; 88. Slide; 89. Right-angle frame; 810. Channel frame; 811. Second screw; 812. Limiting rod; 813. Slide; 814. Digital push-pull force gauge; 815. Contact head; 816. Digital displacement measuring ruler; 817. Reading head. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0023] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Example 1: Reference Figures 1 to 11 As shown, an embodiment of the present invention provides a bicycle rack inspection process and equipment thereof, including a dynamic vertical fatigue test component, a dynamic horizontal fatigue test component and a static horizontal detection component 8; The dynamic vertical fatigue test 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, and 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 rod 21 at the upper end of the first working box 1, and a first slider 22 and a second slider 24 are slidably installed on the horizontal rod 21. The first slider 22 and the second slider 24 can be fixed to the horizontal rod 21 by fasteners. At the same time, two groups of support columns 23 for supporting the horizontal rod 21 are fixedly installed on the first working box 1; Two sets of connecting parts 26 are fixedly mounted 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 the two sets of connecting parts 26. The bolts 27 are adapted to penetrate one end of the bicycle rack and be threadedly connected to the connecting parts 26. A displacement unit fixed to the other end of the bicycle rack is installed on the first slider 22, and the displacement unit includes a concave rod 28 fixedly installed on the first slider 22, a first sliding seat 29 is slidably installed on the concave rod 28, a forward and reverse motor 210 is fixedly installed on the side of the first sliding seat 29, and a first gear 211 is fixedly installed on the output end of the forward and reverse motor 210. The first gear 211 is located in the first sliding seat 29, and a concave space for storing the first gear 211 is opened in the first sliding seat 29. A first rack 213 meshing with the first gear 211 is fixedly installed in the concave rod 28, and the first rack 213 movably runs through the first sliding seat 29; A support base 212 is fixedly mounted on the side of the first sliding base 29 away from the forward and reverse motors 210. The support base 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 base 212 by fasteners. When conducting a dynamic vertical fatigue test, the bicycle rack is initially positioned according to its size by adjusting the positions of the first slider 22 and the second slider 24 on the horizontal bar 21 to match the distance between the two ends of the rack. Fasteners are then used to secure the rack to the horizontal bar 21, completing preliminary positioning. Subsequently, one end of the rack is overlapped onto the two sets of connecting portions 26 of the second slider 24, and the bolts 27 are tightened to penetrate the rack and threadedly connect to the connecting portions 26, thereby firmly securing 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. As the first gear 211 engages with the first rack 213 in the concave rod 28, the first sliding seat 29 slides along the concave rod 28, adjusting the support seat 212 to a position that fits the end of the rack. The rack is then secured to the support seat 212 using fasteners. In this way, the rack is secured from both ends by the support seat 212 and the connecting portion 26, providing a stable and reliable fixing foundation for subsequent dynamic vertical fatigue testing, ensuring a stable rack position and accurate test data during the test.

[0025] In order to provide vertical pressure to the fixed bicycle rack, the test is carried out to simulate the actual use requirements, such as Figure 2-Figure 3 and Figure 6 As shown, a first fixing assembly 4 is provided on the rear saddle of the bicycle rack. The first fixing assembly 4 includes a fixing box 415 placed on the rear saddle of the bicycle rack. The fixing box 415 has four groups of limiting blocks 417 arranged opposite to each other, and weights 416 are placed between the four groups of limiting blocks 417. The weights 416 are suitable for being restricted by the four groups of limiting blocks 417 to achieve two horizontal side restrictions (refer to Figure 6 ); A limiting unit is sleeved on the fixing box 415, and the limiting unit includes two sets of first holding rods 49 arranged horizontally opposite to each other, and the first holding rods 49 are connected to the second holding rods 411 through a connecting column 410, and the two ends of the connecting column 410 are respectively connected to the first holding rod 49 and the second holding rod 411, and the other ends of the first holding rod 49 and the second holding rod 411 are connected to a screw rod 412, and the two ends of the screw rod 412 are threadedly connected to a nut 413; In the initial state, when it is necessary to fix the two vertical ends of the weight 416 placed on the fixing box 415, the connecting column 410 can be manually grasped to make the first holding rod 49 and the second holding rod 411 be sleeved on the fixing box 415, and then the screw rod 412 is passed through the first holding rod 49 and the second holding rod 411, and the nut 413 is tightened to fit the surfaces of the first holding rod 49 and the second holding rod 411 away from each other, so as to connect one end of the first holding rod 49 and the second holding rod 411; At the same time, a guide plate 46 is provided on the upper end of the two groups of first holding rods 49, and a guide rail 47 is provided on the side of the guide plate 46 close to the first holding rod 49. Two groups of sliding blocks 48 are slidably installed on the guide rail 47. The two groups of sliding blocks 48 are respectively fixed to the upper surface of the two groups of first holding rods 49, and a mounting block 41 is fixedly installed 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 on a bearing. One end of the lifting ring 42 passes through the mounting block 41, and a second gear 43 is fixedly mounted on one end of the lifting ring 42. At the same time, a second rack 414 is fixedly mounted on the side of the two groups of sliding blocks 48, which is connected to the second gear 43. The two groups of second racks 414 are arranged opposite to each other. Thus, the lifting ring 42 is adapted to rotate, thereby driving the second gear 43 to rotate. As the second gear 43 rotates, the two sets of second racks 414 can be driven to move closer to or away from each other, thereby driving the two sets of first holding rods 49 to adjust the spacing, thereby being adapted to fix the two vertical sides of weights 416 of different masses. In order to fix the two sets of first pressing rods 49 after adjustment, Figure 6 As shown, a fixing portion 44 is fixedly installed on the side of the lifting ring 42. The fixing portion 44 is arranged in contact with the upper surface of the mounting block 41, and a butterfly bolt 45 is connected to the fixing portion 44. The butterfly bolt 45 is suitable for passing through the fixing portion 44 and being threadedly connected to the upper surface of the mounting block 41. In the present application, anti-slip silicone pads may be provided at the contact positions between the two sets of first holding rods 49 and the weight 416 to increase the clamping firmness of the two vertical sides of the weight 416; During the dynamic vertical fatigue test of a bicycle rack, the first fixing assembly 4 plays a key role in simulating the vertical loads experienced in actual use. First, the fixing box 415 is placed on the bicycle rack's rear saddle, and the weights 416 are positioned between the four sets of limiting blocks 417 to achieve initial horizontal side restraints on the weights 416. Next, the connecting post 410 is manually grasped, allowing the first and second holding rods 49 and 411 to fit over the fixing box 415. The screw rod 412 is inserted through the first and second holding rods, and the nut 413 is tightened to secure one end of the holding rod.

[0026] If you need to adjust the fixing force of the two vertical sides of the weights 416 of different masses, you can rotate the ring 42 to drive the second gear 43 connected to it to rotate. Since the second gear 43 is engaged with the two sets of second racks 414, the two sets of second racks 414 are driven to move closer to or away from each other when the gear rotates, thereby driving the first holding rod 49 fixed on the sliding block 48 to adjust the spacing synchronously. After adjusting to the appropriate position, fix the ring 42 and related components by tightening the butterfly bolt 45 on the fixing part 44 to prevent the holding rod from loosening and shifting during the test. At the same time, the anti-slip silicone pad at the contact position between the first holding rod 49 and the weight 416 further enhances the clamping firmness of the weight 416, ensuring that the weight 416 stably provides vertical holding force for the bicycle rack, ensuring the accuracy and reliability of the fatigue test; In order to suspend the weight 416 to avoid the problem of the bicycle rack being broken or falling off, as shown in FIG. Figure 2-Figure 3 and Figure 6 As shown, a first lifting assembly 3 is provided on one side of the first working box 1. The first lifting assembly 3 includes a support rod 31 fixedly mounted on one side of the first working box 1, and a hanger 32 is fixedly mounted on the support rod 31. The hanger 32 is arranged perpendicular to the support rod 31, and a sliding support 33 is slidably mounted on the hanger 32. An electric chain hoist 34 is fixedly mounted on a side of the sliding support 33 close to the first working box 1. The electric chain hoist 34 has a chain 35, and the chain 35 has a hook 36 adapted for use with a lifting ring 42. The first hoisting assembly 3 is designed to ensure safe bicycle rack testing. During operation, the support rod 31 is fixed to one side of the first working box 1, providing stable support for the entire assembly. The vertically mounted hanger 32 provides ample lifting space. The sliding support 33 slides flexibly on the hanger 32, and the chain hoist 34 is positioned horizontally, 416 allowing precise alignment of the weight fixture on the rear rack of the bicycle rack. When the bicycle rack is secured and ready to be loaded with the weight 416 for dynamic vertical fatigue testing, the chain hoist 34 is operated, and the hook 36 at the end of its chain 35 is lowered to precisely engage with the ring 42 on the mounting block 41 of the fixing box 415. During the test, even if the bicycle rack breaks, the chain hoist 34, through the connection between the hook 36 and the ring 42, and the tension of the chain 35, maintains the weight 416 in a suspended position, preventing it from falling due to a rack break, thus avoiding safety accidents and ensuring the integrity and validity of the test data.

[0027] In order to simulate the impact of vibration when using a bicycle in real life, such as Figure 4As shown, a first driving assembly 6 is installed inside the first working box 1, and the first driving assembly 6 includes a base 61 fixedly installed inside the first working box 1, and a first motor 62 is fixedly installed on the base 61, and the first motor 62 has a rotating shaft 63. At the same time, two groups of first bearing seats 64 are fixedly installed on the base 61, and an eccentric rod (not shown in the figure) is installed between the two groups of first bearing seats 64. One end of the eccentric rod is fixedly connected to the rotating shaft 63, and an eccentric wheel 65 is movably sleeved on the eccentric rod, and a pushing part 66 is movably installed on the eccentric wheel 65. The pushing part 66 has a support rod 67, and the support rod 67 is movably arranged throughout the first working box 1, and one end of the support rod 67 is fixedly connected to the horizontal rod 21; The first drive assembly 6 achieves vibration simulation through mechanical transmission. During operation, a first motor 62, fixed to a base 61 within the first workbox 1, provides the power source for the entire assembly. When the first motor 62 is activated, its rotating shaft 63 begins to rotate. Since the rotating 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, supported by two sets of first bearing blocks 64. The eccentric wheel 65, which is movably mounted on the eccentric wheel, produces 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 in the vertical direction. One end of the support rod 67 is fixedly connected to the horizontal rod 21, which in turn drives 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 eccentric wheel 65 can be changed, thereby adjusting the vibration frequency of the bicycle rack. The eccentricity of the eccentric wheel 65 determines the amplitude of the vibration.

[0028] In order to detect the vibration frequency of the bicycle rack, such as Figure 7 As shown, a first detection assembly 5 is installed on the first working box 1. The first detection assembly 5 includes a concave frame 51 fixedly mounted 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 mounted on 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 attached to the upper surface of the first working box 1. At the same time, two sets of fixed bars 55 are fixedly mounted on the first working box 1, and there is a certain distance between the two sets of fixed bars 55. At the same time, a rotating part 56 is rotatably mounted between one end of the two sets of fixed bars 55. The rotating part 56 has long grooves on both sides. At the same time, a through groove is opened on the rotating part 56. The through groove is connected to the long groove. The combination of the long groove and the through groove is defined as the limiting groove. At the same time, a sliding block 57 is fixedly mounted on the displacement block 54 and slides in accordance with the limiting groove. A support rod 59 is fixedly mounted on one end of the rotating portion 56 , and a first acceleration sensor 510 is fixedly mounted 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. The first detection component 5 is mainly used to detect the vibration frequency of the bicycle rack and can be flexibly adjusted according to bicycle racks of different sizes. The following is its detailed working principle: Because the first screw 52 is threadedly connected to the side of the concave frame 51 and has a displacement block 54 mounted on one end via a bearing, when the first screw 52 is rotated, the screw's rotational motion is converted into linear motion of the displacement block 54 according to the principle of thread transmission. The displacement block 54 moves linearly along the upper surface of the first working box 1, and its movement direction is determined by the rotation direction of the first screw 52.

[0029] A sliding protrusion 57 is fixed to the displacement block 54 and slides in the limiting groove (composed of a combination of elongated grooves and through-grooves) of the rotating portion 56. When the displacement block 54 moves, the sliding protrusion 57 slides within the limiting groove, thereby driving the rotating portion 56 to rotate about the pivot point between the two sets of fixed bars 55.

[0030] When the rotating portion 56 rotates, the support rod 59 fixed at one end thereof also moves, thereby changing the position of the first acceleration sensor 510 mounted on the side of the support rod 59. In this way, the contact rod of the first acceleration sensor 510 can be adjusted to an appropriate position according to bicycle racks of different sizes so that it contacts the bicycle rack.

[0031] When the first drive assembly 6 causes the bicycle rack to vibrate, the contact rod of the first acceleration sensor 510, which is in contact with the bicycle rack, will vibrate accordingly. The first acceleration sensor 510 can convert the vibration of the contact rod into an electrical signal that is correlated with the acceleration of the vibration. By analyzing and processing this electrical signal, the vibration frequency of the bicycle rack can be calculated. This allows accurate frequency information of the bicycle rack under a vibration environment that simulates real-world use, providing an important basis for evaluating the performance of the bicycle rack.

[0032] At the same time, a first PLC control system 11 is fixedly installed on the first working box 1, and the first PLC control system 11 is used to control the operation of the above-mentioned driving equipment; In summary, the dynamic vertical fatigue test assembly of the present invention, wherein the first adjustment assembly 2, by sliding the first and second sliders 22 and 24 on the horizontal rod 21, adapts to bicycle racks of different sizes and is secured with fasteners, is simple to operate. The racks are secured at both ends by connecting portions 26 and bolts 27, and by support bases 212 and fasteners, respectively, reducing the number of nuts 413 used and the number of operation steps. At the same time, the first fixing component 4 fixes the weight 416 by rotating the lifting ring 42 to drive the cooperation of the second gear 43 and the second rack 414 to adjust the spacing of the first holding rod 49, and then fix it with the butterfly bolt 45, which greatly simplifies the fixing process, significantly improves the installation and replacement efficiency of the shelf and the weight 416, and reduces labor intensity.

[0033] like Figure 1 、 Figure 8-Figure 9 As shown, the dynamic horizontal fatigue test assembly includes a second working box 7 arranged on one side of the first working box 1, and a second driving assembly 76 is installed in the second working box 7. The second driving assembly 76 includes a base 761 fixedly installed in the second working box 7, and a second motor 762 is fixedly installed on the base 761. A long rod 763 is fixedly installed at the output end of the second motor 762, and a connecting piece 764 is fixedly installed near one end of the long rod 763. At the same time, two sets of second bearing seats 767 are fixedly installed on the second working box 7. The two sets of second bearing seats 767 are rotatably mounted with a cross bar 768. A rocking bar 765 is fixedly mounted on the side of the cross bar 768 close to the second working box 7. The rocking bar 765 is movably installed through the second working box 7, and a through slot larger than the width of the rocking bar 765 is opened on the second working box 7 to provide rocking space for the rocking bar 765. A waist groove 766 is formed at one end of the rocking rod 765 , and the connecting member 764 is located in the waist groove 766 . A restriction portion is provided at one end of the connecting member 764 to prevent the connecting member 764 from falling out of the waist groove 766 . A second adjustment assembly 72 is mounted 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 differs from the first adjustment assembly 2 in that the horizontal rod 21 of the second adjustment assembly 72 is defined as a crossbar 768. The crossbar 768 is mounted between the two sets of second bearing seats 767. At the same time, the crossbar 768 is no longer supported by the two sets of support columns 23. Here, the first slider 22 and the second slider 24 of the second adjustment component 72 are defined as the third slider and the fourth slider (refer to Figure 8, from left to right), and a second adjustment assembly 72 is fixedly installed on the third slider and the fourth slider. The second adjustment assembly 72 and the first adjustment assembly 2 have a similar structure and are used to fix the two ends of the bicycle rack; At the same time, a second fixing assembly 77 is fixed to the rear saddle of the bicycle rack, and the second fixing assembly 77 and the first fixing assembly 4 have a similar structure. A second hanging assembly 73 is provided on one side of the second working box 7, and the second hanging assembly 73 and the first hanging assembly 3 have a similar structure. A second detection assembly 74 is installed on the second working box 7, and the second detection assembly 74 and the first detection assembly 5 have a similar structure. The first acceleration sensor 510 of the second detection assembly 74 is defined as a second acceleration sensor. The detection end of the second acceleration sensor is located at the center position of the two side ends of the bicycle rack, so that when the long rod 763 rotates left and right, it can drive the two side ends of the bicycle rack to be suitable for contacting the detection end of the second acceleration sensor; A second PLC control system 71 is fixedly mounted on the second working box 7, and the second PLC control system 71 is used to control the operation of the driving device of the dynamic horizontal fatigue test assembly; The working principle of the dynamic horizontal fatigue test assembly is mainly to provide power through the second driving assembly 76 to drive the bicycle rack to swing horizontally, while using the second adjustment assembly 72, the second fixing assembly 77 and the like to fix and adjust the rack, and the second detection assembly 74 to detect relevant data of the rack, as follows: The second motor 762 is fixedly mounted on the pedestal 761 in the second working box 7 and serves as the power source for the entire dynamic horizontal fatigue test. When the second motor 762 is started, its output end drives the long bar 763 to rotate. The connector 764, which is fixedly mounted near one end of the long bar 763, cooperates with the waist groove 766 opened at one end of the rocking arm 765, and the connector 764 moves in the waist groove 766. Since the limiting part at one end of the connector 764 prevents it from escaping from the waist groove 766, when the long bar 763 rotates, it will drive the rocking arm 765 to swing in the through groove on the second working box 7 through the connector 764. The swinging of the rocking arm 765 drives the cross bar 768 to rotate between the two sets of second bearing seats 767.

[0034] The second adjustment assembly 72 is similar in structure to the first adjustment assembly 2. The horizontal rod 21 is defined as a crossbar 768, with bearings mounted between two sets of second bearing blocks 767. A third and fourth sliders (equivalent to the first and second sliders 22 and 24 in the first adjustment assembly 2) slide on the crossbar 768. Structures on the third and fourth sliders (similar to those in the first adjustment assembly 2) secure the bicycle rack at both ends. Before securing, the positions of the third and fourth sliders on the crossbar 768 can be adjusted to match the distance between the two ends of the bicycle rack, based on the rack's dimensions. The third and fourth sliders can then be secured using a similar fastening method, completing the initial positioning and installation of the rack. Furthermore, the second fixing assembly 77, similar in structure to the first fixing assembly 4, further secures the rear saddle of the rack and, through similar operations, allows for the securement and adjustment of weights 416 and other components placed thereon, providing the necessary restraint and load for horizontal testing.

[0035] The second lifting assembly 73 is similar in structure to the first lifting assembly 3 and is mounted on one side of the second working box 7. During the test process, when heavy objects such as the weights 416 on the shelf need to be lifted or when unexpected situations such as the shelf may break occur, the second lifting assembly 73 can use a similar working method, such as an electric chain hoist 34, to lift the heavy objects and prevent them from falling, thereby ensuring the safety of the test process and the integrity and validity of the test data.

[0036] The second detection assembly 74 is similar in structure to the first detection assembly 5, with the detection end of the second acceleration sensor located at the center of each side of the bicycle rack. When the long bar 763 rotates left and right, driving the crossbar 768 to rotate, causing the two sides of the bicycle rack to swing and contact the detection end of the second acceleration sensor, the second acceleration sensor can convert the vibration of the rack into an electrical signal. By analyzing and processing these electrical signals, the bicycle rack's horizontal vibration frequency, acceleration, and other related data can be calculated, thereby evaluating the rack's performance under horizontal dynamic loads and determining whether it meets relevant standards and requirements.

[0037] Example 2: To perform static level detection on bicycle racks to detect various aspects of bicycle rack performance, such as Figure 1 and Figure 9-10 As shown, a static level detection assembly 8 is provided on one side of the second working box 7. The static level detection assembly 8 includes a third working box 81 provided on one side of the second working box 7, and a base 82 is fixedly mounted on the third working box 81. A bicycle rack body 83 is fixedly mounted on the base 82 by multiple sets of bolts, and a first moving unit is installed on the second working box 7. The first movable unit includes a concave frame 84 fixedly mounted on the second working box 7 and located at one side of the base 82, a screw rod 85 is mounted on a bearing on the concave frame 84, and a rotating member 87 is fixedly mounted on one end of the screw rod 85, and guide posts 86 are fixedly mounted on the concave frame 84 at both sides of the screw rod 85, and a slide 88 is threadedly connected to the screw rod 85, and the slide 88 is movably connected to the two sets of guide posts 86, and a right-angle frame 89 is fixedly mounted on the side of the slide 88, and the second movable unit is fixedly mounted on the right-angle frame 89; The second movable unit includes a channel frame 810 fixedly mounted on a side of the right-angle frame 89 away from the concave frame 84, and a second screw 811 is mounted on the channel frame 810 in a bearing, and limiting rods 812 are fixedly mounted on both sides of the channel frame 810, and a slide 813 is threadedly connected to the second screw 811, and the slide 813 is movably connected to the two sets of limiting rods 812 at the same time, and a digital push-pull force gauge 814 is fixedly mounted on the slide 813, and the digital push-pull force gauge 814 has a contact head 815, and the contact head 815 is suitable for contacting the bicycle rack body 83; Meanwhile, a digital displacement measuring ruler 816 is fixedly mounted on the trough frame 810 , and a reading head 817 is slidably mounted on the digital displacement measuring ruler 816 , and the reading head 817 is connected to the digital push-pull force gauge 814 ; The working principle of the static level detection assembly 8 is to adjust the position of the digital push-pull force gauge 814 through the first and second moving units so that it contacts the bicycle rack body 83 and applies a horizontal force. At the same time, the digital displacement measuring ruler 816 is used to measure the displacement, thereby detecting the performance of the bicycle rack in a static level state. The details are as follows: The bicycle rack body 83 is fixedly mounted on the base 82 on the third working box 81 by multiple sets of bolts, ensuring the stable position of the rack during the inspection process, providing a reliable basis for subsequent inspections.

[0038] Concave frame 84 is fixedly mounted on second work box 7 and located on one side of base 82. Screw 85 is mounted on concave frame 84 with bearings, and guide posts 86 are fixedly mounted on either side of screw 85. When screw 85 is rotated, slide 88, threadedly connected to screw 85 and simultaneously flexibly sleeved onto two sets of guide posts 86, moves linearly along the axial direction of screw 85 on guide posts 86 according to the principle of threaded transmission. This allows slide 88 to move horizontally toward or away from bicycle rack body 83, enabling preliminary horizontal position adjustment of digital dynamometer 814.

[0039] The channel frame 810 is fixedly mounted on the side of the right-angle frame 89 away from the concave frame 84, the second screw 811 is mounted on the channel frame 810, and the limiting rods 812 are fixedly mounted on both sides of the second screw 811. The slide 813 is threadedly connected to the second screw 811 and is movably sleeved on the two sets of limiting rods 812. When the second screw 811 is rotated, the slide 813 will perform linear motion on the limiting rods 812 along the axial direction of the second screw 811. Through this operation, the position of the digital push-pull force gauge 814 in a direction perpendicular to the movement of the first movable unit can be further accurately adjusted so that the contact head 815 of the digital push-pull force gauge 814 accurately contacts the bicycle rack body 83.

[0040] After the digital force gauge 814 contacts the bicycle rack body 83, it applies a horizontal force to the rack and displays the magnitude of the applied force in real time. Simultaneously, a reading head 817 on the digital displacement measuring scale 816 is connected to the digital force gauge 814. When the digital force gauge 814 applies force to the rack, causing it to displace, the reading head 817 slides across the digital displacement measuring scale 816, thereby measuring the rack's displacement and displaying it on the digital displacement measuring scale 816.

[0041] By analyzing data such as 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 of the bicycle rack in a static horizontal state can be evaluated to determine whether it meets relevant quality standards and usage requirements.

[0042] Example 3: The above-mentioned steps for fatigue detection of bicycle racks are as follows: Step 1: Adjust the first slider 22 and the second slider 24 to fit the shelf at the position of the horizontal rod 21, fix the sliders 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 then fix the other end to complete the installation of the shelf in the dynamic vertical fatigue test assembly.

[0043] Step 2: Place the fixing box 415 and the weight 416 on the rear saddle of the shelf, connect the first and second holding rods, rotate the lifting ring 42 to adjust the spacing, tighten the butterfly bolt 45 to fix it, and check the non-slip silicone pad to ensure it is clamped.

[0044] Step 3: Operate the electric chain hoist 34 to engage the hook 36 with the 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.

[0045] Step 4: Install the shelf to the dynamic horizontal fatigue test assembly, adjust the third and fourth sliders to fit the shelf and fix them, install the adjustment weight 416; start the second motor 762 to make the shelf swing horizontally, enable the second lifting assembly 73 protection, and adjust the second acceleration sensor detection data.

[0046] Step 5: Fix the shelf to the base 82 of the static level detection assembly 8, adjust the position of the digital push-pull force gauge 814 through the screw 85 and the second screw 811 so that it contacts the shelf, apply horizontal force and record the displacement, analyze the data and evaluate the static performance of the shelf.

[0047] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A bicycle rack inspection device, comprising a dynamic vertical fatigue test assembly, characterized in that: The dynamic vertical fatigue test assembly comprises a first fixing unit for fixing one end of a bicycle rack, a displacement unit for fixing the other end of the bicycle rack, and a first fixing assembly (4) for limiting the rear frame of the bicycle rack. The first fixing assembly (4) comprises a fixing box (415), two groups of first holding rods (49), two groups of second holding rods (411), and a limiting unit. The fixing box (415) is suitable for placing weights for balancing the rear frame of the bicycle rack. The first holding rods (49) and the second holding rods (411) are used to hold and limit the weights. A certain gap exists between the first holding rods (49) and the second holding rods (411) to cooperate with the limiting unit to change the distance between the two groups of first holding rods (49), thereby realizing the function of quickly assembling weights.

2. The bicycle rack inspection device according to claim 1, characterized in that: The dynamic vertical fatigue test assembly further comprises a first working box (1), a first adjusting assembly (2) for supporting and fixing a bicycle rack is installed on the first working box (1), the fixing box (415) is placed on the rear frame of the bicycle rack, the fixing box (415) has four groups of limiting blocks (417) arranged relatively, weights are placed between the four groups of limiting blocks (417), a limiting unit is sleeved on the fixing box (415), and two groups of the first holding rods (49) are arranged horizontally relatively. The first holding rod (49) is connected to the second holding rod (411) through a connecting column (410), and the two ends of the connecting column (410) are respectively connected to the first holding rod (49) and the second holding rod (411), and the other ends of the first holding rod (49) and the second holding rod (411) are connected to a screw rod (412), and the two ends of the screw rod (412) are threadedly connected to nuts (413), and non-slip silicone pads are provided at the contact positions of the two groups of the first holding rods (49) and the weights; A guide plate (46) is provided at the upper end of the two groups of the first holding rods (49), a guide rail (47) is provided on the side of the guide plate (46) close to the first holding rod (49), two groups of sliding blocks (48) are slidably installed on the guide rail (47), and the two groups of sliding blocks (48) are respectively fixed to the two groups of first holding rods (49), a mounting block (41) is installed on the guide plate (46), a hanging ring (42) is installed on the bearing of the mounting block (41), one end of the hanging ring (42) passes through the mounting block (41), and a second gear (43) is installed on one end of the hanging ring (42), and a second rack (414) corresponding to the second gear (43) is installed on the side of the two groups of sliding blocks (48), and the two groups of the second rack (414) are arranged opposite to each other; A fixing portion (44) is installed on the side of the hanging ring (42), and the fixing portion (44) is arranged to fit on the upper surface of the mounting block (41). A butterfly bolt (45) is connected to the fixing portion (44).

3. The bicycle rack inspection device according to claim 2, characterized in that: The first fixing unit comprises a horizontal rod (21) 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), the first slider (22) and the second slider (24) can be fixed to the horizontal rod (21) by fasteners, and two groups of support columns (23) are mounted on the first working box (1) to support the horizontal rod (21); Two groups of connecting parts (26) are installed on the second sliding block (24), and one end of the bicycle rack is suitable for overlapping the two groups of connecting parts (26). Bolts (27) are threadedly connected to the two groups of connecting parts (26), and the bolts (27) are suitable for passing through one end of the bicycle rack and being threadedly connected to the connecting parts (26).

4. The bicycle rack inspection device according to claim 3, characterized in that: The displacement unit is mounted on a first slider (22), and comprises a concave rod (28) mounted on the first slider (22); a first sliding seat (29) is slidably mounted on the concave 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 in the first sliding seat (29); a space for storing the first gear (211) is provided in the first sliding seat (29); a first rack (213) meshing with the first gear (211) is mounted in the concave rod (28); the first rack (213) is movably arranged to pass 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 a fastener.

5. The bicycle rack inspection device according to claim 4, characterized in that: A first hoisting assembly (3) is provided on one side of the first working box (1), and the first hoisting assembly (3) includes a support rod (31) installed on one side of the first working box (1), a hanger (32) is installed on the support rod (31), and the hanger (32) is arranged perpendicular to the support rod (31), and a sliding support (33) is slidably installed on the hanger (32), and a chain electric hoist (34) is installed on a side of the sliding support (33) close to the first working box (1), and the chain electric hoist (34) has a chain (35), and the chain (35) has a hook (36) adapted for use with the lifting ring (42).

6. The bicycle rack inspection device according to claim 5, characterized in that: A first driving assembly (6) is installed inside the first working box (1), and the first driving 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 groups of first bearing seats (64) are installed on the base (61), an eccentric rod is installed between the two groups 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), and the pushing part (66) has a support rod (67), the support rod (67) is movably arranged to pass through the first working box (1), and one end of the support rod (67) is fixedly connected to the horizontal rod (21).

7. The bicycle rack inspection device according to claim 6, characterized in that: A first detection assembly (5) is installed on the first working box (1), and the first detection assembly (5) includes a concave frame (51) installed on the first working box (1), a first screw rod (52) is threadedly connected to the side of the concave frame (51), a turntable (53) is fixedly installed on one end of the first screw rod (52), a displacement block (54) is installed on one end of the first screw rod (52), and the displacement block (54) is attached to the upper surface of the first working box (1), and two groups of fixed bars (55) are installed on the first working box (1), and a certain distance is left between the two groups of fixed bars (55); A rotating portion (56) is rotatably mounted between one end of the two groups of fixed bars (55), and both sides of the rotating portion (56) are provided with long grooves. A through groove is provided on the rotating portion (56), and the through groove is connected to the long groove. The combination of the long groove and the through groove is defined as a limiting groove. A sliding protrusion (57) adapted to slide with the limiting groove is mounted 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), and the first acceleration sensor (510) has a contact rod.

8. The bicycle rack inspection device according to claim 7, characterized in that: A dynamic horizontal fatigue test assembly is provided on one side of the first working box (1), and the dynamic horizontal fatigue test assembly includes a second working box (7) provided on one side of the first working box (1), a second driving assembly (76) is installed in the second working box (7), and the second driving assembly (76) includes a pedestal (761) installed in the second working box (7), a second motor (762) is installed on the pedestal (761), a long bar (763) is installed at the output end of the second motor (762), and a connecting piece (764) is installed near one end of the long bar (763); Two groups of second bearing seats (767) are installed on the second working box (7), and the two groups of second bearing seats (767) are rotatably installed with a cross bar (768). A rocking bar (765) is installed on the side of the cross bar (768) close to the second working box (7). The rocking bar (765) is movable through the second working box (7). A through groove larger than the width of the rocking bar (765) is provided on the second working box (7), and the through groove provides a rocking space for the rocking bar (765). A waist groove (766) is provided at one end of the rocking bar (765), and the connecting piece (764) is in the waist groove (766). One end of the connecting piece (764) has a limiting portion, and the limiting portion is used to prevent the connecting piece (764) from escaping from the waist groove (766). A second adjustment assembly (72) is installed on the second working box (7). The second adjustment assembly (72) and the first adjustment assembly (2) are similar in structure. The second adjustment assembly (72) is different from the first adjustment assembly (2) in that the horizontal rod (21) of the second adjustment assembly (72) is defined as a crossbar (768). The bearing of the crossbar (768) is installed between the two sets of the 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 component (72) are defined as a third slider and a fourth slider, the second adjustment component (72) is fixedly mounted on the third slider and the fourth slider, and 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; A bicycle rack has a rear saddle on which a second fixing assembly (77) is fixed, the second fixing assembly (77) and the first fixing assembly (4) having a similar structure, a second hoisting assembly (73) is provided on one side of a second working box (7), the second hoisting assembly (73) and the first hoisting assembly (3) having a similar structure, a second detection assembly (74) is installed on the second working box (7), the second detection assembly (74) and the first detection assembly (5) having a similar structure, a first acceleration sensor (510) of the second detection assembly (74) being defined as a second acceleration sensor, and a detection end of the second acceleration sensor being located at a central position of both side ends of the bicycle rack.

9. The bicycle rack inspection device according to claim 8, characterized in that: A static level detection assembly (8) is provided on one side of the second working box (7), and the static level detection assembly (8) includes a third working box (81) provided on one side of the second working box (7), a base (82) is installed on the third working box (81), a bicycle rack body (83) is fixedly installed on the base (82) by multiple groups of bolts, and a first moving unit is installed on the second working box (7); The first moving unit comprises a concave frame (84) mounted on the second working box (7) and located at one side of the base (82); a screw rod (85) is mounted on a bearing on the concave frame (84); a rotating member (87) is mounted on one end of the screw rod (85); guide posts (86) are mounted on the concave frame (84) and located at both sides of the screw rod (85); a slide seat (88) is threadedly connected to the screw rod (85); the slide seat (88) is movably sleeved on two groups of the guide posts (86); a right-angle frame (89) is mounted on the side of the slide seat (88); and a second moving unit is mounted on the right-angle frame (89); The second moving unit comprises a channel frame (810) mounted on a side of the right-angle frame (89) away from the concave frame (84); a second screw rod (811) is mounted on a bearing on the channel frame (810); limiting rods (812) are mounted on both sides of the second screw rod (811) on the channel frame (810); a slide (813) is threadedly connected to the second screw rod (811); the slide (813) is movably sleeved on two groups 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); and the contact head (815) is suitable for contacting the bicycle rack body (83); A digital displacement measuring ruler (816) is installed on the trough-shaped 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).

10. A bicycle rack inspection process using the bicycle rack inspection device according to any one of claims 1 to 9, 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 the position of the horizontal rod (21) to adapt to the rack, fix the slider with a fastener, fix one end of the rack through the connecting part (26) and the bolt (27), start the displacement unit forward and reverse motor (210) to drive the support base (212) to move and then fix the other end, completing the installation of the rack in the dynamic vertical fatigue test assembly; Step 2: Place the fixed box (415) and the weight (416) on the rear saddle of the shelf, connect the first and second holding rods, rotate the lifting ring (42) to adjust the spacing, tighten the butterfly bolt (45) to fix, and check the anti-slip silicone pad to ensure it is clamped; Step 3: Operate the chain electric 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; Step 4: Install the shelf to the dynamic horizontal fatigue test assembly, adjust the third and fourth sliders to fit the shelf and fix them, and install the adjustment weight (416); start the second motor (762) to make the shelf swing horizontally, enable the second lifting assembly (73) protection, and adjust the second acceleration sensor detection data; Step 5: Fix the shelf to the base (82) of the static level detection assembly (8), adjust the position of the digital push-pull force gauge (814) through the screw (85) and the second screw (811) so that it contacts the shelf, apply horizontal force and record the displacement, and analyze the data to evaluate the static performance of the shelf.

Images