A test device for the load-bearing capacity of bicycle frames used in bicycle manufacturing

Abstract

This invention discloses a bicycle frame load-bearing capacity testing device, relating to the field of frame testing. It includes a base and a testing component disposed at its ends. A load-bearing component is fixedly disposed on one side of the base, and a connecting component is slidably disposed at the end of the base. An adjustment assembly is assembled at both ends of the base, including an adjustment column, a locking ring, and a locking block for locking and protecting the support points at both ends of the frame. This bicycle frame load-bearing capacity testing device applies force to the pedal end of the frame through a pressing mechanism. Combined with irregular pedaling angles and forces, it can simulate complex working conditions in real riding, breaking through the limitations of a single vertical force. It fully considers the multi-directional forces generated by the rider at different angles, thus more accurately reproducing the real stress state under complex riding conditions. This allows for precise detection of the stress state of the bottom bracket area, obtaining more accurate and detailed stress analysis results, and providing more reliable performance evaluation.

Description

Technical Field

[0001] This invention relates to frame testing technology, specifically to a device for testing the load-bearing capacity of bicycle frames used in bicycle manufacturing. Background Technology

[0002] A bicycle, also known as a pedal bike or cyclist, is typically a small, two-wheeled land vehicle. Riders power it by pedaling, making it a green and environmentally friendly mode of transportation. The bicycle frame, as the core load-bearing structure, directly affects riding safety and product lifespan due to its load-bearing capacity and fatigue resistance.

[0003] Chinese invention patent CN120992339A discloses an electric bicycle frame strength testing device. This device, through a series of interconnected components including drive teeth, a lifting cylinder, touch buttons, and connectors, can simultaneously apply force to both the vertical direction and one side of the frame during strength testing. This allows for multi-angle testing of the frame, simulating real-world stress scenarios, improving testing efficiency, and ensuring accurate results. The device utilizes a crossbar, crank, and pulley system to apply force to both the vertical direction and one side of the frame. Simultaneously, the pulley system drives the crank to rotate, causing it to press against the crossbar. This causes the crossbar to move upwards and compress the transmission rod, resulting in vibration of the fixed module and thus the frame itself. This vibration allows for the detection of frame fatigue characteristics, achieving comprehensive testing.

[0004] Existing testing methods typically do not consider scenarios such as frame tilt or changes in riding posture (e.g., standing while pedaling, rapid acceleration, turning): when the left and right legs alternately exert force, irregular lateral swings will occur, which can easily lead to deviations between test results and actual usage conditions; at the same time, the frame is not always kept horizontal during riding, and will be subjected to instantaneous impact loads when encountering obstacles such as speed bumps and potholes. Furthermore, the pedaling force is not only vertically downward, but also includes forward, backward, left, right and diagonal components, so it cannot truly reflect the impact of pedaling behavior on the stress distribution of the frame. Summary of the Invention

[0005] The purpose of this invention is to provide a test device for the load-bearing capacity of bicycle frames used in bicycle manufacturing, so as to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bicycle frame load-bearing capacity testing device, comprising a base and a testing component disposed at its end, wherein a load-bearing component is fixedly disposed on one side of the base, and a connecting component is slidably disposed at the end of the base; An adjustment assembly, which is assembled at both ends of the base, includes an adjustment post, a locking ring, and a locking block for locking and protecting the support points at both ends of the frame; The end of the adjusting column is engaged with the outer surface of the locking ring, and one side of the locking ring is fixedly connected to the end of the locking block. The adjusting column drives the locking block to rotate around the central axis of the adjusting column, thereby locking and adjusting the tilt angle of the frame to simulate the side tilt or pitch state of the frame when standing and pedaling. The pressing assembly, assembled at the end of the connector, includes two protective plates and a ball for applying force to the pedal end of the frame; The sphere is rotatably positioned between the two protective plates. The protective plates rotate along the outer surface of the sphere, thereby dynamically pressing it with varying force angles and magnitudes to simulate irregular pedaling movements and to test the load-bearing capacity of the frame.

[0007] As a further optimization of the present invention, the adjustment assembly further includes an adjustment plate that is engaged with the base, the end of the adjustment plate is provided with a guide rail, and a guide block is slidably provided on the outer surface of the guide rail.

[0008] As a further optimization of the present invention, a support plate is fixedly provided at the end of the guide block, and an extension plate is symmetrically fixedly provided at the upper end of the support plate. The opposite sides of the two extension plates are slidably connected to the outer surface of the adjusting column. At the same time, the upper end of the support plate and the side located on the extension plate support the outer surface of the adjusting column through a positioning plate.

[0009] As a further optimization of the present invention, a swing plate is fixedly provided at the end of the adjusting column, and a swing block is rotatably provided at the end of the swing plate away from the adjusting column.

[0010] As a further optimization of the present invention, a movable plate is fixedly provided on one side of the adjusting plate, the movable plate has a V-shaped cross-section, and the outer surface of the movable plate is slidably connected to the outer surface of the swing block.

[0011] As a further optimization of the present invention, the pressing component further includes a movable plate that engages with the connector, a locking block is fixedly provided at the middle position of the end of the movable plate, and an adjusting block is rotatably provided at the end of the locking block.

[0012] As a further optimization of the present invention, a movable column is slidably provided at the end of the adjusting block, and the end of the movable column is fixedly connected to the outer surface of the sphere.

[0013] As a further optimization of the present invention, a limiting rod is fixedly provided at the end of the movable column away from the sphere, and a limiting plate is fixedly provided at the end of the limiting rod.

[0014] As a further optimization of the present invention, a limiting ring is rotatably provided on one side of the snap-fit ​​block, and an arc-shaped groove is symmetrically opened on the outer surface of the limiting ring. The inner wall of the arc-shaped groove is fitted and slidably connected with the outer surface of the limiting plate.

[0015] As a further optimization of the present invention, a telescopic member is fixedly provided between the two protective plates, and the upper end of the telescopic member is engaged with the lower end of the adjusting block.

[0016] Compared with the prior art, the bicycle frame load-bearing capacity testing device provided by the present invention has the following advantages: By applying force to the pedal end of the frame through a pressing mechanism, combined with irregular pedaling angles and forces, the complex working conditions in real riding can be simulated. This breaks through the limitations of a single vertical force and fully considers the multi-directional forces generated by the rider at different angles. As a result, the real force state under complex riding conditions can be reproduced more accurately, thereby accurately detecting the force state of the bottom bracket and obtaining more accurate and detailed force analysis results, providing a more reliable performance evaluation.

[0017] The frame tilt angle can be adjusted by the adjustment mechanism to make it closer to the real riding state, which is used to simulate scenarios such as standing riding or rapidly changing riding posture. Combined with the dynamic adjustment function of the tilt angle, it can accurately simulate the stress distribution of the frame under different riding postures, thereby helping to evaluate the frame's resistance to deformation and fatigue during dynamic use.

[0018] By coordinating the pressing and adjusting mechanisms, various scenarios that may be encountered in actual riding can be simulated, such as different road conditions and frame tilt changes, as well as the effects of different riding postures such as sitting or standing. This allows failure modes that only appear under extreme combined conditions such as "standing and rocking over bumps" to be exposed in advance, thus obtaining more accurate and detailed stress analysis results and providing more reliable performance evaluation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is an overall structural cross-sectional view provided for an embodiment of the present invention; Figure 3This is a schematic diagram of the adjustment component structure provided in an embodiment of the present invention; Figure 4 This is a first exploded view of the adjustment component structure provided in an embodiment of the present invention; Figure 5 This is a second exploded view of the adjustment component structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the pressing component structure provided in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the pressing component structure provided in an embodiment of the present invention; Figure 8 This is an exploded view of the pressing component structure provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1. Base; 2. Adjustment assembly; 3. Pressing assembly; 11. Connector; 12. Load-bearing component; 21. Adjustment plate; 22. Guide rail; 221. Guide block; 23. Support plate; 231. Extension plate; 24. Adjustment column; 25. Swing plate; 251. Swing block; 26. Moving plate; 27. Locking ring; 28. Locking block; 31. Movable plate; 32. Snap-fit ​​block; 33. Adjustment block; 34. Limiting ring; 341. Arc groove; 35. Movable column; 351. Limiting rod; 352. Limiting plate; 36. Sphere; 37. Protective plate; 38. Telescopic component. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example: Please refer to Figure 1 - Figure 8 A bicycle frame load-bearing capacity testing device for bicycle manufacturing includes a base 1 and a testing component disposed at its end. A load-bearing component 12 is fixedly disposed on one side of the base 1, and a connecting component 11 is slidably disposed at the end of the base 1.

[0024] In this design, two load plates are fixedly installed at the end of the load component 12, located above the handlebars and seat of the bicycle frame, respectively, to apply different gravity to simulate the rider's body center of gravity distribution and load changes. At the same time, the load component 12 adopts a hydraulic design or a modular counterweight design. The modular counterweight can be quickly replaced with counterweight blocks of different masses according to the test requirements, accurately reproducing various working conditions such as leisure riding, competitive hill climbing, and heavy cargo loading.

[0025] Furthermore, the adjustment assembly 2, which is assembled at both ends of the base 1, includes an adjustment column 24, a locking ring 27, and a locking block 28 for locking and protecting the support points at both ends of the frame; the end of the adjustment column 24 is engaged with the outer surface of the locking ring 27, and one side of the locking ring 27 is fixedly connected to the end of the locking block 28. The adjustment column 24 drives the locking ring 27 to rotate around the central axis of the adjustment column 24, thereby locking and adjusting the tilt angle of the frame to simulate the side tilt or pitch state of the frame when standing and pedaling.

[0026] In this embodiment, the locking ring 27 is fastened to the end of the adjusting column 24 by bolts or other fixing components; at the same time, the locking block 28 fixed on the locking ring 27 locks the end of the frame fork, thereby ensuring that the frame remains stable during the simulation process and avoiding test data distortion or safety hazards caused by insecure fixing.

[0027] The inner side of the locking block 28 is provided with an arc-shaped groove that matches the contour of the end of the frame fork. The surface of the groove is covered with an elastic buffer layer, which can achieve a tight fit to avoid slippage and protect the frame surface from clamping damage.

[0028] When the frame tilt angle needs to be adjusted, the adjusting column 24 is rotated, which drives the locking ring 27 and locking block 28 to rotate synchronously. The rotation angle range can be freely set to cover most of the tilt and pitch scenarios in daily riding. After the angle is adjusted to the correct position, it is locked by the fastening bolt at the end of the adjusting column 24 to ensure that the frame posture remains stable throughout the test.

[0029] Furthermore, the adjustment assembly 2 also includes an adjustment plate 21 that is snapped into the base 1. The end of the adjustment plate 21 is provided with a guide rail 22, and a guide block 221 is slidably provided on the outer surface of the guide rail 22.

[0030] Specifically, there are components with telescopic functions such as electric telescopic rods between the adjustment plate 21 and the base 1, which are used to drive the adjustment component 2 to move up and down to simulate uphill and downhill scenarios, thereby adjusting the overall height and longitudinal tilt angle of the frame, while simulating the vertical impact brought by bumpy roads.

[0031] The design of the guide block 221 and the guide rail 22 allows the support plate 23 to move horizontally along the direction of the guide rail 22, thereby adapting to different wheelbase frame models and expanding the applicability of the testing device. The guide rail 22 is equipped with limit blocks at both ends, which can prevent the guide block 221 from leaving the track during the sliding process, ensuring the safety and stability of the adjustment process.

[0032] Furthermore, a support plate 23 is fixedly provided at the end of the guide block 221, and an extension plate 231 is symmetrically fixedly provided at the upper end of the support plate 23. The opposite sides of the two extension plates 231 are slidably connected to the outer surface of the adjusting column 24. At the same time, the upper end of the support plate 23 and the side of the extension plate 231 support the outer surface of the adjusting column 24 through the positioning plate.

[0033] Specifically, the guide block 221 locks the support plate 23 with bolts and other fixing components. The extension plate 231 and the positioning plate form a three-point support structure, which can effectively distribute the radial load of the adjusting column 24 and avoid wear or loosening caused by single-point stress concentration. A telescopic component such as an electric telescopic rod is provided between the support plate 23 and the adjusting plate 21, and is connected to an external control device to drive the support plate 23 to move on the guide rail 22.

[0034] The outer surface of the adjusting column 24 is provided with a guide groove along the axial direction, which forms a sliding fit with the guide protrusion on the inner side of the extension plate 231. This ensures that the adjusting column 24 can extend and retract along the axial direction to adapt to frames of different heights, while also restricting its circumferential freedom to ensure the accuracy of angle adjustment.

[0035] Furthermore, a swing plate 25 is fixedly provided at the end of the adjusting column 24, and a swing block 251 is rotatably provided at the end of the swing plate 25 away from the adjusting column 24.

[0036] Specifically, the cross-section of the structure formed by the adjusting column 24, the swing plate 25 and the swing block 251 is Z-shaped. The end of the swing block 251 is provided with a spherical groove, which forms a point contact with the V-shaped outer surface of the moving plate 26, so that the swing block 251 can adaptively adjust its posture when sliding on the surface of the moving plate 26, thereby reducing frictional resistance and improving transmission efficiency.

[0037] Furthermore, a movable plate 26 is fixedly provided on one side of the adjusting plate 21. The movable plate 26 has a V-shaped cross-section, and its outer surface is slidably connected to the outer surface of the swing block 251.

[0038] Specifically, the V-shaped design of the moving plate 26 gives it self-centering characteristics. When the swing block 251 slides on the surface of the moving plate 26, the V-shaped inclined surface can automatically correct the offset and ensure the stability of the transmission path. At the same time, the included angle of the two inclined surfaces of the V-shaped structure can be changed according to the test requirements to adjust the sliding resistance and response sensitivity of the swing block 251 and adapt to dynamic test scenarios of different intensities.

[0039] The movable plate 26 and the adjusting plate 21 are connected by a screw drive mechanism or a linear motor and are driven by an external control system to move back and forth in the horizontal direction. When the movable plate 26 is horizontally displaced, the swing block 251 slides along the V-shaped inclined plane, thereby driving the swing plate 25 and the adjusting column 24 to swing periodically around their axis, simulating the lateral sway of the frame caused by the alternating force exerted by the left and right legs during riding.

[0040] The swing amplitude and frequency can be precisely controlled by adjusting the displacement stroke and reciprocating speed of the moving plate 26. Its stroke range covers the typical swing amplitude from daily riding to competitive sprinting, and the frequency range matches the dynamic response under different cadences. A sensor is installed at the connection between the swing plate 25 and the adjustment column 24 to monitor the resistance and gravity changes during the swing process in real time, providing data support for evaluating the frame's torsional and load-bearing performance.

[0041] Furthermore, the pressing component 3, assembled at the end of the connector 11, includes two protective plates 37 and a ball 36 for applying force to the pedal end of the frame; the ball 36 is rotatably disposed between the two protective plates 37, and the protective plates 37 rotate along the outer surface of the ball 36, thereby applying dynamic pressure with varying force angles and varying force magnitudes to simulate irregular pedaling movements and to detect the load-bearing capacity of the frame.

[0042] In this embodiment, the lower end of the protective plate 37 is provided with a clamp or other fixing components to lock the entire pressing assembly 3 onto the pedal, ensuring that the force application point coincides with the center of the pedal and avoiding torque distortion caused by offset; at the same time, the inner side of the clamp is provided with an anti-slip silicone pad, which can enhance the friction with the pedal and prevent the metal clamp from scratching the surface of the pedal.

[0043] The sphere 36 is made of high-strength alloy steel and its surface is hardened to withstand high-frequency impact loads. Its spherical design makes the contact with the protective plate 37 a rolling friction, which greatly reduces wear and ensures the flexibility of the force direction.

[0044] Two protective plates 37 are symmetrically distributed on both sides of the sphere 36, forming a ring-shaped structure. The inner side of the protective plate 37 is provided with an arc-shaped slide that matches the outer contour of the sphere 36. The slide is embedded with a self-lubricating bearing, which allows the sphere 36 to rotate freely in three-dimensional space and achieve all-round coverage of the force application angle.

[0045] Furthermore, the pressing assembly 3 also includes a movable plate 31 that engages with the connector 11. A locking block 32 is fixedly provided at the middle position of the end of the movable plate 31, and an adjusting block 33 is rotatably provided at the end of the locking block 32.

[0046] Specifically, the connector 11 is symmetrically arranged at the upper end of the base 1. The connector 11 is a hydraulic telescopic arm or electric push rod with universal adjustment function at the end. Its fixed end is hinged to the side wall of the base 1, and its movable end is snapped into the movable plate 31 through a quick-release structure, which facilitates quick adjustment and adaptation according to the bottom bracket height of different frames.

[0047] The extension stroke and thrust output of the connector 11 are precisely controlled by an external servo control system, which can accurately reproduce the pedaling force, including the instantaneous burst force during acceleration and the continuous force during constant speed riding. At the same time, the end of the connector 11 is provided with a positioning cylinder, and the inner wall of the positioning cylinder is fixedly installed with power output devices such as motors. The output end of the motor drives the movable plate 31 to rotate around the central axis of the motor through the drive plate to simulate pedaling action. A hydraulic rod is provided between the drive plate and the movable plate 31 to adjust the force applied by the movable plate 31.

[0048] Furthermore, a movable column 35 is slidably provided at the end of the adjusting block 33, and the end of the movable column 35 is fixedly connected to the outer surface of the ball 36.

[0049] Specifically, the adjustment block 33 uses components with telescopic functions such as an electric telescopic rod, and its end is a universally adjustable component used to adjust the distance between the ball 36 and the movable plate 31, thereby changing the length of the force arm and realizing fine adjustment of the pedaling torque; at the same time, the universal adjustment structure allows the movable column 35 to swing freely within the conical range, so that the force direction of the ball 36 can be changed arbitrarily between front and back, left and right and diagonal, fully covering the multidimensional decomposition characteristics of force in the actual pedaling process.

[0050] Furthermore, a limiting rod 351 is fixedly provided at the end of the movable column 35 away from the ball 36, and a limiting plate 352 is fixedly provided at the end of the limiting rod 351. A limiting ring 34 is rotatably provided on one side of the snap-fit ​​block 32, and an arc-shaped groove 341 is symmetrically opened on the outer surface of the limiting ring 34. The inner wall of the arc-shaped groove 341 is fitted and slidably connected with the outer surface of the limiting plate 352.

[0051] Specifically, the limiting ring 34 is rotatably connected to the snap block 32 through the bearing, and the two sets of arc grooves 341 symmetrically opened on its outer surface constitute the motion constraint boundary for the swaying of the ball 36; the radius of curvature of the arc groove 341 matches the sliding trajectory of the limiting plate 352, so that the ball 36 swings regularly within the preset cone angle range, avoiding the loss of control of the force direction due to unrestrained free movement.

[0052] The limiting plate 352 and the limiting rod 351 form a T-shaped structure, and its outer contour is adapted to the cross-sectional shape of the arc groove 341 to form a sliding fit. When the adjusting block 33 drives the movable column 35 to extend or retract, the limiting plate 352 slides along the arc groove 341, which simultaneously drives the ball 36 to change its spatial position. The arc design of the arc groove 341 limits the extreme swing angle of the ball 36, ensuring that the direction of force is always within the effective test range.

[0053] The opening angle of the arc groove 341 can be changed according to the test requirements, corresponding to the typical working conditions of stable pedaling in a seated position and vigorous rocking in a standing position; there is an angle scale mark between the limit ring 34 and the locking block 32, which makes it easy for operators to quickly set and reproduce specific swing angle parameters.

[0054] Furthermore, a telescopic component 38 is fixedly installed between the two protective plates 37, and the upper end of the telescopic component 38 is engaged with the lower end of the adjusting block 33.

[0055] Specifically, the telescopic component 38 adopts a multi-stage hydraulic cylinder or pneumatic spring combination structure. The outer wall of its cylinder is equipped with a pressure sensor and a displacement sensor, which can monitor the axial compression and internal pressure changes of the telescopic component 38 in real time, and then deduce the actual force and dynamic fluctuation characteristics of the ball 36 applied to the pedal.

[0056] The lower end of the telescopic component 38 is connected to the upper end of the protective plate 37 through a hinge seat, and the upper end is engaged with the lower end of the adjusting block 33 through a ball joint, forming a flexible transmission link. This link can transmit vertical pressing force and adapt to the lateral displacement component generated when the ball 36 swings, effectively avoiding stress concentration and structural interference caused by rigid connection.

[0057] The control device can choose a microcontroller as the control terminal. In this embodiment, the microcontroller is a typical embedded microcontroller unit, consisting of an arithmetic logic unit (ALU), a controller, memory, input / output devices, etc., essentially a miniature computer. Compared to general-purpose microprocessors used in personal computers, it emphasizes self-sufficiency (no external hardware required) and cost savings. Its biggest advantage is its small size, allowing it to be placed inside the instrument, but it has limited storage capacity, simple input / output interfaces, and low power consumption.

[0058] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A test device for the load-bearing capacity of a bicycle frame, comprising a base (1) and a test piece disposed at its end, characterized in that, A load-bearing component (12) is fixedly provided on one side of the base (1), and a connector (11) is slidably provided at the end of the base (1). Adjustment assembly (2), which is assembled at both ends of the base (1), includes adjustment column (24), locking ring (27) and locking block (28) for locking and protecting the support points at both ends of the frame. The end of the adjusting column (24) is engaged with the outer surface of the locking ring (27), and one side of the locking ring (27) is fixedly connected to the end of the locking block (28). The adjusting column (24) drives the locking ring (27) to rotate around the central axis of the adjusting column (24), thereby locking and adjusting the tilt angle of the frame to simulate the side tilt or pitch state of the frame when standing and pedaling. The pressing component (3), assembled at the end of the connector (11), includes two protective plates (37) and a ball (36) for applying force to the pedal end of the frame. The sphere (36) is rotatably disposed between the two protective plates (37). The protective plates (37) rotate along the outer surface of the sphere (36) to dynamically press with varying force angles and magnitudes, simulating irregular stepping motions, and is used to test the load-bearing capacity of the frame.

2. The bicycle frame load-bearing capacity testing device according to claim 1, characterized in that, The adjustment assembly (2) further includes an adjustment plate (21) that is engaged with the base (1). The end of the adjustment plate (21) is provided with a guide rail (22), and a guide block (221) is slidably provided on the outer surface of the guide rail (22).

3. The bicycle frame load-bearing capacity testing device according to claim 2, characterized in that, A support plate (23) is fixedly provided at the end of the guide block (221). An extension plate (231) is symmetrically fixed at the upper end of the support plate (23). The opposite sides of the two extension plates (231) are slidably connected to the outer surface of the adjusting column (24). At the same time, the upper end of the support plate (23) and the side of the extension plate (231) support the outer surface of the adjusting column (24) through the positioning plate.

4. The bicycle frame load-bearing capacity testing device according to claim 3, characterized in that, A swing plate (25) is fixedly provided at the end of the adjusting column (24), and a swing block (251) is rotatably provided at the end of the swing plate (25) away from the adjusting column (24).

5. The bicycle frame load-bearing capacity testing device according to claim 4, characterized in that, A movable plate (26) is fixedly provided on one side of the adjusting plate (21). The movable plate (26) has a V-shaped cross-section and its outer surface is slidably connected to the outer surface of the swing block (251).

6. The bicycle frame load-bearing capacity testing device according to claim 1, characterized in that, The pressing component (3) also includes a movable plate (31) that engages with the connector (11). A locking block (32) is fixedly provided at the middle position of the end of the movable plate (31), and an adjusting block (33) is rotatably provided at the end of the locking block (32).

7. The bicycle frame load-bearing capacity testing device according to claim 6, characterized in that, The end of the adjusting block (33) is slidably provided with a movable column (35), and the end of the movable column (35) is fixedly connected to the outer surface of the sphere (36).

8. The bicycle frame load-bearing capacity testing device according to claim 7, characterized in that, A limiting rod (351) is fixedly provided at one end of the movable column (35) away from the ball (36), and a limiting plate (352) is fixedly provided at the end of the limiting rod (351).

9. A bicycle frame load-bearing capacity testing device according to claim 8, characterized in that, A limiting ring (34) is rotatably provided on one side of the snap-fit ​​block (32). The outer surface of the limiting ring (34) is symmetrically provided with arc-shaped grooves (341). The inner wall of the arc-shaped grooves (341) is fitted and slidably connected to the outer surface of the limiting plate (352).

10. A bicycle frame load-bearing capacity testing device according to claim 9, characterized in that, A telescopic component (38) is fixedly provided between the two protective plates (37), and the upper end of the telescopic component (38) is engaged with the lower end of the adjusting block (33).

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