Hub testing machine

Abstract

The utility model relates to a hub testing machine which comprises a rack, a mounting plate is horizontally and fixedly connected to the middle of the inner side of the rack, a first mounting seat is fixedly connected to the top of the mounting plate, a torsion motor is fixedly connected to the top of the first mounting seat, a coupler is fixedly connected to a rotating shaft of the torsion motor, and the coupler is fixedly connected to the rotating shaft of the torsion motor. The output end of the coupler is fixedly connected with a torsion sensor, a clamping mechanism is arranged at the output end of the torsion sensor, a workpiece is detachably arranged on the inner side of the clamping mechanism, the outer side wall of the workpiece is fixedly connected with a transmission gear, and a tensioning mechanism is arranged on the side portion of the clamping mechanism. The tensioning mechanism comprises a tensioning gear. The beneficial effects of the utility model are that through the arrangement of the torsion motor, the clamping mechanism and the servo motor, the hub can be independently tested in different torsion states, the state of the hub can be conveniently observed in real time, the structure is simple, the hub can be conveniently disassembled and assembled, and the test efficiency can be effectively improved.

Description

A type of hub testing machine Technical Field

[0001] This utility model relates to the technical field of bicycle testing equipment, specifically to a hub testing machine. Background Technology

[0002] The bicycle hub is the core component of a bicycle wheelset, responsible for supporting the weight of the entire bicycle and transmitting power. When the rider pedals, power is transmitted through the chain to the freewheel on the rear wheel. The pawl / ratchet mechanism inside the hub engages to transfer power to the wheelset, propelling the bicycle forward. Simultaneously, the hub connects to the rim via spokes, providing stable support for the wheelset and ensuring smooth wheel rotation. Therefore, hubs require testing during production.

[0003] For example, a bicycle hub testing device with publication number CN119533911A includes a frame, a wheel, a hub under test, a torsion wheel, a driven wheel, a first drive device, a drive wheel, a rear hub test chain, a front hub test chain, a braking mechanism, and a counterweight mechanism. The front end of the frame is pivotally connected to the frame. The wheel, including the tire, is mounted on the frame. The hub under test rotates synchronously with the wheel. The torsion wheel is located below the wheel and contacts the tire, and a driven wheel is mounted on its axle. The drive wheel is driven by the first drive device to achieve rotation and is connected to the hub under test via the rear hub test chain, or to the driven wheel via the front hub test chain. The braking mechanism acts on the wheel to simulate braking. The counterweight mechanism acts on the frame to adjust the load.

[0004] The aforementioned testing equipment can only test the wheels and hubs as a whole, and cannot perform fatigue, static load, and destructive tests on the hubs alone. It is also difficult to directly observe the real-time condition of the hubs during testing, and the structure is relatively complex and inconvenient to operate. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that existing hub testing machines are difficult to test hubs individually and have complex structures that are inconvenient to operate.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A hub testing machine includes a frame. A mounting plate is horizontally fixedly connected to the middle of the inner side of the frame. A first mounting base is fixedly connected to the top of the mounting plate. A torque motor is fixedly connected to the top of the first mounting base. A coupling is fixedly connected to the shaft of the torque motor. A torque sensor is fixedly connected to the output end of the coupling. A clamping mechanism is provided at the output end of the torque sensor. A hub is detachably mounted on the inner side of the clamping mechanism. A transmission gear is fixedly connected to the outer wall of the hub. A tensioning mechanism, including a tensioning gear, is provided on the side of the clamping mechanism. A second mounting base is fixedly connected to the bottom of the frame. A servo motor is fixedly connected to the top of the second mounting base. A drive gear is fixedly connected to the shaft of the servo motor. The axes of the drive gear, transmission gear, and tensioning gear are parallel and located in the same vertical plane. A transmission chain meshes with the external parts of the drive gear, transmission gear, and tensioning gear.

[0008] Furthermore, the torque sensor is fixedly connected to the first mounting base, and the transmission gear is coaxially arranged with the hub.

[0009] Furthermore, the clamping mechanism includes a base, which is horizontally fixedly connected to the top of the mounting plate. A pair of fixed plates are vertically fixedly connected to both sides of the top of the base. The fixed plates are perpendicular to the output shaft of the torque sensor. A pair of guide rods are fixedly connected between the pair of fixed plates. A movable plate is slidably connected to the guide rod. The movable plate is parallel to the fixed plate. A first lead screw is rotatably connected to the side wall of the movable plate away from the torque sensor. The other end of the first lead screw passes through the fixed plate away from the torque sensor and is threadedly connected to it.

[0010] Furthermore, the rotating shaft of the torque sensor passes through the adjacent fixed plate and is rotatably connected to the fixed plate. The rotating shaft of the torque sensor is fixedly connected to a mounting ring. Several limiting rods are fixedly connected to the side wall of the mounting ring away from the torque sensor around the axis of the mounting ring. The hub is coaxially arranged with the mounting ring, and the end of the hub away from the mounting ring is rotatably connected to the side wall of the movable plate.

[0011] Furthermore, the tensioning mechanism includes a fixed seat, which is fixedly connected to the mounting plate. A second lead screw is rotatably connected to one side wall of the fixed seat facing the clamping mechanism. The second lead screw is perpendicular to the side wall of the fixed seat facing the clamping mechanism. A movable seat is threadedly connected to the other side wall of the second lead screw. The movable seat is slidably connected to the fixed plate. A pair of connecting plates are fixedly connected to the top of the movable seat. The tensioning gear is rotatably connected between the side walls of the pair of connecting plates.

[0012] Furthermore, slots are provided at the connection points between the movable seat, the base, the mounting plate, and the transmission chain.

[0013] Furthermore, a handle is fixedly connected to the end of both the first and second lead screws away from the hub.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The hub testing machine of this utility model, by being equipped with a torque motor, a clamping mechanism and a servo motor, can perform individual tests on the hub under different torque conditions, which facilitates real-time observation of the hub's status. Moreover, the structure is simple and easy to disassemble and assemble the hub, which can effectively improve testing efficiency.

[0016] 2. The hub testing machine of this utility model is equipped with a tensioning mechanism, which can adjust the tension of the drive chain before the hub is tested, so as to avoid the drive chain from becoming loose or breaking due to excessive tightness during the test, thus affecting the test results. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of a flower drum testing machine according to this utility model;

[0018] Figure 2 is a front view structural schematic diagram of a flower drum testing machine according to the present invention;

[0019] Figure 3 is a schematic diagram showing the connection between the clamping mechanism and the tensioning mechanism of a hub testing machine according to this utility model;

[0020] Figure 4 is a top view of the clamping mechanism and tensioning mechanism of a hub testing machine according to this utility model;

[0021] Figure 5 is an enlarged schematic diagram of the structure at point A of the flower drum testing machine of this utility model;

[0022] Figure 6 is a schematic diagram of the hub structure of a hub testing machine according to this utility model.

[0023] Reference numerals: 1. Frame; 2. First mounting base; 3. Mounting plate; 4. Clamping mechanism; 401. Base; 402. Movable plate; 403. Fixed plate; 404. First lead screw; 405. Limiting rod; 406. Mounting ring; 5. Second mounting base; 6. Torque motor; 7. Coupling; 8. Torque sensor; 9. Servo motor; 10. Tensioning mechanism; 1001. Fixed base; 1002. Movable base; 1003. Second lead screw; 1004. Connecting plate; 1005. Tensioning gear; 11. Drive gear; 12. Hub; 13. Transmission gear; 14. Transmission chain; 15. Slotted. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0025] Referring to Figures 1-2 and 6, the hub testing machine of this embodiment includes a frame 1. A mounting plate 3 is horizontally fixedly connected to the middle of the inner side of the frame 1. A first mounting base 2 is fixedly connected to the top of the mounting plate 3. A torque motor 6 is fixedly connected to the top of the first mounting base 2 for applying torque to the hub 12 under test. A coupling 7 is fixedly connected to the shaft of the torque motor 6. A torque sensor 8 is fixedly connected to the output end of the coupling 7 for real-time adjustment of the torque parameters. A clamping mechanism 4 is provided at the output end of the torque sensor 8 for clamping and fixing the hub 12. The hub 12 is detachably provided on the inner side of the clamping mechanism 4. A transmission gear 13 is fixedly connected to the outer wall of the hub 12 for driving the hub 12 to rotate. The side of the clamping mechanism 4 is provided with... A tensioning mechanism 10 is provided to adjust the tension of the transmission chain 14. The tensioning mechanism 10 includes a tensioning gear 1005. A second mounting base 5 is fixedly connected to the bottom of the frame 1. A servo motor 9 is fixedly connected to the top of the second mounting base 5 to drive the hub 12 to rotate. A drive gear 11 is fixedly connected to the shaft of the servo motor 9. The axes of the drive gear 11, transmission gear 13 and tensioning gear 1005 are arranged in parallel. The drive gear 11, transmission gear 13 and tensioning gear 1005 are all located in the same vertical plane. The transmission chain 14 is externally meshed with the drive gear 11, transmission gear 13 and tensioning gear 1005. A torque sensor 8 is fixedly connected to the first mounting base 2. The transmission gear 13 is coaxially arranged with the hub 12.During fatigue testing, the hub 12 is clamped and fixed by the clamping mechanism 4. Then, the tension of the transmission chain 14 is adjusted to the test state by the tensioning mechanism 10. At this time, the servo motor 9 is off, and the drive gear 11, transmission gear 13, tension gear 1005, and hub 12 are all fixed. Then, the torque motor 6 is started, causing the shafts of the coupling 7 and torque sensor 8 to rotate and apply torque to the hub 12 until the parameter of the torque sensor 8 is the same as the test torque. Then, the servo motor 9 is started, causing the servo motor 9 to drive the drive gear 11 to rotate in the opposite direction to the rotation direction of the torque motor 6. When the drive gear 11 rotates, it drives the transmission chain 14 to start moving. When the transmission chain 14 moves, it drives the transmission gear 13, which meshes with it, to rotate synchronously, so that the hub 12... The hub 12 is rotated at a certain angle under test load, and the above steps are repeated to perform multiple tests. The wear and damage status of the hub 12 are observed to achieve fatigue testing of the hub 12. During the single static load test, a certain torque is applied to the hub 12, and the hub 12 is driven to rotate for a long time by the servo motor 9. Finally, the state of the hub 12 is observed to achieve single static load testing of the hub 12. During the destructive test, the hub 12 is kept fixed, and the torque motor 6 continuously applies torque to the hub 12 until the hub 12 is damaged, so as to test the maximum damage torque of the hub 12. By performing durability tests on the hub 12 at different speeds and torques, a comprehensive test of the hub 12 is achieved, which greatly improves the test accuracy and allows for real-time observation of the state of the hub 12.

[0026] Referring to Figures 3-5, the clamping mechanism 4 includes a base 401, which is horizontally fixed to the top of the mounting plate 3. A pair of fixed plates 403 are vertically fixed to both sides of the top of the base 401. The fixed plates 403 are perpendicular to the output shaft of the torque sensor 8. A pair of guide rods are fixedly connected between the fixed plates 403. A movable plate 402 is slidably connected to the guide rods. The movable plate 402 is parallel to the fixed plates 403. A first lead screw 404 is rotatably connected to the side wall of the movable plate 402 away from the torque sensor 8. The other end of the lead screw 404 passes through the fixed plate 403 on the side away from the torque sensor 8 and is threaded to it. The rotating shaft of the torque sensor 8 passes through the adjacent fixed plate 403 and is rotatably connected to the fixed plate 403. The rotating shaft of the torque sensor 8 is fixedly connected to a mounting ring 406. Several limiting rods 405 are fixedly connected to the side wall of the mounting ring 406 away from the torque sensor 8 around the axis of the mounting ring 406. The hub 12 is coaxially arranged with the mounting ring 406, and the end of the hub 12 away from the mounting ring 406 is rotatably connected to the side wall of the movable plate 403. During positioning and clamping, the through hole of the annular protrusion side wall at the end of the hub 12 is aligned with the limiting rods 405 to position the hub 12. At this time, the first lead screw 404 is rotated, which drives the movable plate 402 to move towards the hub 12 until the other end of the hub 12 abuts against the side wall of the movable plate 402, thus fixing the hub 12.

[0027] The tensioning mechanism 10 includes a fixed seat 1001, which is fixedly connected to the mounting plate 3. A second lead screw 1003 is rotatably connected to one side wall of the fixed seat 1001 facing the clamping mechanism 4. The second lead screw 1003 is perpendicular to the side wall of the fixed seat 1001 facing the clamping mechanism 4. A movable seat 1002 is threadedly connected to the other side wall of the second lead screw 1003. The movable seat 1002 is slidably connected to the fixed plate 3. A pair of connecting plates 1004 are fixedly connected to the top of the movable seat 1002. A tensioning gear 1005 is rotatably connected between the side walls of the pair of connecting plates 1004. When adjusting the tension of the transmission chain 14, if the transmission chain 14 is too tight, rotate the second lead screw 1003 to make the movable seat 1002 move towards the hub 12, which will drive the connecting plate 1004 and the tension gear 1005 to move accordingly, thereby reducing the tension on the transmission chain 14; when the transmission chain 14 is too loose, adjust the position of the tension gear 1005 in the opposite direction to increase the tension on the transmission chain 14.

[0028] The movable seat 1002, the base 401, and the connection between the mounting plate 3 and the transmission chain 14 are all provided with slots 15.

[0029] Handles are fixedly connected to the ends of the first lead screw 404 and the second lead screw 1003 that are away from the hub 12.

[0030] Working principle: Before testing, the hub 12 is clamped and fixed by the clamping mechanism 4. The middle part of the hub 12 is cylindrical, and both ends of the cylinder are provided with annular protrusions. The side walls of the annular protrusions are provided with an array of through holes. For the specific structure, refer to Figure 6. During positioning and clamping, the through holes on the side walls of the annular protrusions at the ends of the hub 12 are aligned with the limiting rod 405 to position the hub 12. At this time, the first lead screw 404 is rotated, which drives the movable plate 402 to move towards the hub 12 until the other end of the hub 12 abuts against the side wall of the movable plate 402, thus fixing the hub 12. Then, the tension of the transmission chain 14 is adjusted by the tensioning mechanism 10. If the transmission chain 14 is too tight, the second lead screw 1003 is rotated, causing the movable seat 1002 to move towards the hub 12, which in turn drives the connecting plate 1004 and the tensioning gear 1005 to move, thereby reducing the tension on the transmission chain 14. When the transmission chain 14 is too loose, the position of the tensioning gear 1005 is adjusted in the opposite direction to increase the tension on the transmission chain 14, thus maintaining the appropriate tension of the transmission chain 14. Then, the hub 12 is tested under different conditions.

[0031] During fatigue testing, servo motor 9 is in the off state, and drive gear 11, transmission gear 13, tension gear 1005, and hub 12 are all fixed. Then, torque motor 6 is started, causing the shafts of coupling 7 and torque sensor 8 to rotate and apply torque to hub 12 until the parameter of torque sensor 8 matches the test torque. Then, servo motor 9 is started, causing drive gear 11 to rotate in the opposite direction to the rotation of torque motor 6. When drive gear 11 rotates, it drives transmission chain 14 to move. When transmission chain 14 moves, it drives transmission gear 13 to rotate synchronously, causing hub 12 to rotate a certain angle under the test load. The above steps are repeated for hub 12. 2. Conduct multiple tests to observe the wear and damage state of hub 12, thus achieving fatigue testing of hub 12; during a single static load test, apply a certain torque to hub 12, drive hub 12 to rotate for a long time via servo motor 9, and finally observe the state of hub 12, thus achieving single static load testing of hub 12; during a destructive test, keep hub 12 fixed, and continuously apply torque to hub 12 via torque motor 6 until hub 12 is damaged, thereby testing the maximum damage torque of hub 12; by conducting durability tests on hub 12 at different speeds and torques, a comprehensive test of hub 12 is achieved, significantly improving test accuracy, and the state of hub 12 can be observed in real time.

[0032] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A wheel test machine characterized by: The system includes a frame (1), a mounting plate (3) is horizontally fixedly connected to the middle of the inner side of the frame (1), a first mounting base (2) is fixedly connected to the top of the mounting plate (3), a torque motor (6) is fixedly connected to the top of the first mounting base (2), a coupling (7) is fixedly connected to the shaft of the torque motor (6), a torque sensor (8) is fixedly connected to the output end of the coupling (7), a clamping mechanism (4) is provided at the output end of the torque sensor (8), a hub (12) is detachably provided on the inner side of the clamping mechanism (4), a transmission gear (13) is fixedly connected to the outer wall of the hub (12), and a tensioning device is provided on the side of the clamping mechanism (4). The mechanism (10) includes a tensioning gear (1005). A second mounting base (5) is fixedly connected to the bottom of the frame (1). A servo motor (9) is fixedly connected to the top of the second mounting base (5). A drive gear (11) is fixedly connected to the shaft of the servo motor (9). The axes of the drive gear (11), transmission gear (13), and tensioning gear (1005) are arranged in parallel. The drive gear (11), transmission gear (13), and tensioning gear (1005) are all located in the same vertical plane. A transmission chain (14) is externally meshed with the drive gear (11), transmission gear (13), and tensioning gear (1005).

2. The hub testing machine according to claim 1, characterized in that: The torque sensor (8) is fixedly connected to the first mounting base (2), and the transmission gear (13) is coaxially arranged with the hub (12).

3. The hub testing machine according to claim 1, characterized in that: The clamping mechanism (4) includes a base (401), which is horizontally fixed to the top of the mounting plate (3). A pair of fixing plates (403) are vertically fixed to the two sides of the top of the base (401). The fixing plates (403) are perpendicular to the output shaft of the torque sensor (8). A pair of guide rods are fixedly connected between the pair of fixing plates (403). A movable plate (402) is slidably connected to the guide rod. The movable plate (402) is parallel to the fixing plate (403). A first lead screw (404) is rotatably connected to the side wall of the movable plate (402) away from the torque sensor (8). The other end of the first lead screw (404) passes through the fixing plate (403) away from the torque sensor (8) and is threaded to it.

4. A hub testing machine according to claim 3, characterized in that: The rotating shaft of the torque sensor (8) passes through the adjacent fixed plate (403) and is rotatably connected to the fixed plate (403). The rotating shaft of the torque sensor (8) is fixedly connected to the mounting ring (406). A number of limiting rods (405) are fixedly connected to the side wall of the mounting ring (406) away from the torque sensor (8) around the axis of the mounting ring (406). The hub (12) is coaxially arranged with the mounting ring (406). The end of the hub (12) away from the mounting ring (406) is rotatably connected to the side wall of the movable plate (402).

5. The hub tester of claim 3 wherein: The tensioning mechanism (10) includes a fixed seat (1001), which is fixedly connected to the mounting plate (3). The fixed seat (1001) is rotatably connected to a second lead screw (1003) on one side wall of the clamping mechanism (4). The second lead screw (1003) is perpendicular to the side wall of the fixed seat (1001) on one side wall of the clamping mechanism (4). The other end of the second lead screw (1003) is threadedly connected to a movable seat (1002). The movable seat (1002) is slidably connected to the fixed plate (403). A pair of connecting plates (1004) are fixedly connected to the top of the movable seat (1002). The tensioning gear (1005) is rotatably connected between the side walls of the pair of connecting plates (1004).

6. A hub testing machine according to claim 5, characterized in that: The movable seat (1002), the base (401), and the connection between the mounting plate (3) and the transmission chain (14) are all provided with slots (15).

7. The hub tester of claim 5 wherein: The first lead screw (404) and the second lead screw (1003) are both fixedly connected to a handle at the end away from the hub (12).

Images