CN117309647A - Bicycle synchronous belt fatigue testing device and testing method thereof - Google Patents
Bicycle synchronous belt fatigue testing device and testing method thereof Download PDFInfo
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- CN117309647A CN117309647A CN202311413264.5A CN202311413264A CN117309647A CN 117309647 A CN117309647 A CN 117309647A CN 202311413264 A CN202311413264 A CN 202311413264A CN 117309647 A CN117309647 A CN 117309647A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/023—Power-transmitting endless elements, e.g. belts or chains
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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Abstract
The utility model discloses a bicycle synchronous belt fatigue test device and a test method thereof, wherein the test device comprises a test bench, a simulation assembly and a control device, the simulation assembly comprises a synchronous belt driving device, a belt wheel deviation device, a synchronous belt loading device, a synchronous belt stretching device and a speed measuring device, all devices of the simulation assembly are connected with and controlled by the control device, and the control device is provided with a timing module, a display module and a control processing module; the synchronous belt driving device comprises a driving belt pulley, a driven belt pulley and a rotating motor, a synchronous belt to be detected is sleeved between the driving belt pulley and the driven belt pulley, the belt pulley shifting device is arranged on the movable part of the rotating motor, the synchronous belt stretching device comprises a jacking piece and a transmission mechanism, and the transmission mechanism is in linkage with the movable part of the rotating motor. The utility model can test multiple road conditions, increases the accuracy of test results, and the belt wheel deviation device and the synchronous belt stretching device can be linked through the rotating motor, thereby reducing the cost of the device.
Description
Technical Field
The utility model relates to the technical field of fatigue testing, in particular to a bicycle synchronous belt fatigue testing device and a testing method thereof.
Background
The synchronous toothed belt is characterized in that a steel wire rope or a glass fiber rope is used as a strong layer, polyurethane or chloroprene rubber is coated on the outer surface of the synchronous toothed belt, the inner Zhou Zhicheng tooth shape of the belt is meshed with a toothed belt wheel, and the synchronous toothed belt is used as an important part for power transmission and is widely applied to mechanical transmission of bicycles. The bicycle with the synchronous belt transmission drives the driving belt wheel on the front side of the bicycle to rotate through the pedal, so that the synchronous belt is in transmission with the synchronous belt of the driving belt wheel to realize the linkage with the driven belt wheel on the rear side of the bicycle.
In the production research and development process of the synchronous belt, the running of a bicycle is required to be simulated to carry out fatigue test on the synchronous belt, so that the ingredients of the synchronous belt, the production process and the parameters of the synchronous belt are adjusted and corrected according to the abrasion condition of the synchronous belt, and the synchronous belt is improved. For example, the utility model patent with publication number of CN206848091U discloses a bicycle belt fatigue testing device, which comprises a test bench frame and a flywheel arranged on the test bench frame, wherein the flywheel is connected with a chain wheel through a chain, the chain is coated with a belt, two sides of the flywheel are provided with supporting seats, the supporting seats are arranged on the test bench frame, a control module is further arranged on the test bench frame and connected with a computer, a software testing unit is arranged in the computer, a riding bench frame is connected below the flywheel, a speed measuring mechanism is arranged at the rear of the flywheel, and a resistance structure is arranged on one side of the flywheel.
The condition that the wheel drives the hold-in range and deviates when the wheel passes through the barrier takes place to jolt when still having the wheel to run on the uneven road surface of bicycle and the condition that hold-in range and barrier support and stretch, the fatigue resistance of hold-in range when influencing the bicycle and riding, current testing arrangement can only detect the load fatigue test of hold-in range on horizontal road conditions alone usually, the detection function is comparatively single, be difficult to carry out fatigue test to the hold-in range comparatively comprehensively, the fatigue test result that leads to the hold-in range is inaccurate, still need add equipment in order to simulate different road conditions in addition, the suitability is relatively poor, the cost of device has been increased.
Disclosure of Invention
The utility model aims to solve the defects of the technology, and provides a bicycle synchronous belt fatigue testing device and a testing method thereof, which can be used for testing a plurality of road conditions, so that the accuracy of testing results is improved, and a belt wheel deviation device and a synchronous belt stretching device can be linked through a rotating motor, so that the cost of the device is reduced.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
on one hand, the utility model provides a bicycle synchronous belt fatigue testing device, which is characterized in that: the device comprises a test table, a simulation assembly and a control device, wherein the simulation assembly and the control device are arranged on the test table, the simulation assembly comprises a synchronous belt driving device, a belt wheel deviation device, a synchronous belt loading device, a synchronous belt stretching device and a speed measuring device, all devices of the simulation assembly are connected with and controlled by the control device, and the control device is provided with a timing module, a display module and a control processing module;
the synchronous belt driving device comprises a driving belt pulley, a driven belt pulley and a rotating motor, a synchronous belt to be detected is sleeved between the driving belt pulley and the driven belt pulley, the rotating motor is electrically connected with the control device, the driving belt pulley is provided with an induction end, an induction receiver which is in inductive fit with the induction end is arranged on the test bench at a position close to the driving belt pulley, and the induction receiver is electrically connected with the control device;
the belt pulley shifting device is arranged on the movable part of the rotating motor and is used for driving the driving belt pulley to rotate at an initial position or move back and forth at a swinging position and rotate;
the synchronous belt load device is movably connected to the test bench, and is connected with the driven belt pulley to apply resistance to the driven belt pulley and enable the synchronous belt to be tested to be in tensioning fit between the driving belt pulley and the driven belt pulley;
the synchronous belt stretching device comprises a jacking piece and a transmission mechanism, wherein the jacking piece is movably connected between the test bench and the position corresponding to the position between the driving belt pulley and the driven belt pulley, and the transmission mechanism is linked with the movable part of the rotating motor and used for driving the jacking piece to move up and down and driving the synchronous belt to be tested to stretch and deform;
the speed measuring device comprises a first speed sensor and a second speed sensor, and is used for detecting the rotation speeds of the driving belt pulley and the driven belt pulley respectively, and the control device controls the acquisition of the first speed sensor and the second speed sensor.
Preferably, the inner diameter of the driving pulley is larger than the inner diameter of the driven pulley.
Preferably, the pulley shifting device comprises a centering shaft and a driving disc, a connecting frame is arranged on the test board, the centering shaft is rotationally connected in the connecting frame and connected with the movable part of the rotating motor, the driving pulley is in sleeve joint fit with the centering shaft, the driving disc is connected with the centering shaft, at least one connecting part arranged at intervals with the centering shaft is arranged on the driving disc, and a connecting sleeve for sleeve joint fit with the connecting part is hollow in the driving pulley.
Preferably, the pulley offset device further comprises a guide disc, a first elastic piece and an adjusting piece, wherein the guide disc is arranged at intervals with the driving disc, the driving pulley is positioned between the guide disc and the driving disc, an abutting column is arranged on the side wall, close to the guide disc, of the driving pulley, the first elastic piece acts between the driving disc and the driving pulley, so that the driving pulley moves along the axial direction of the centering shaft, close to the guide disc, and the abutting column abuts against the guide disc;
the upper portion of the guide disc is provided with a movable connection in the connecting frame, the middle portion of the guide disc is communicated with the centering shaft for relative movement, the adjusting piece is in threaded connection with the connecting frame, and the adjusting piece penetrates through the end portion of the connecting frame to be matched with the lower portion of the guide disc.
The pulley shifting device enables the axial direction of the guide disc and the axial direction of the centering shaft to form two states of parallel or inclined;
when the axial direction of the guide disc is in a parallel state with the axial direction of the centering shaft, the adjusting member supports the guide disc to be maintained at an initial position to maintain the guide disc parallel to the opposite side of the driving pulley, which is positioned and rotated on the centering shaft;
when the axial direction of the guide disc and the axial direction of the centering shaft are in an inclined state, the adjusting piece supports the guide disc to be kept in a swinging position so as to maintain the intersection of the guide disc and a plane on which opposite sides of the driving pulley lie, and the driving pulley axially translates and rotates back and forth on the centering shaft.
Preferably, the synchronous belt loading device comprises an adjusting frame and resistance equipment arranged on the adjusting frame, the adjusting frame is rotationally connected with an extension shaft, the driven belt pulley is connected with a first end of the extension shaft, a first belt pulley is arranged at the movable end of the resistance equipment and a second end of the extension shaft, a first driving belt is sleeved between the two first belt pulleys, and the first driving belt is meshed with the first belt pulley.
Preferably, the resistance device may be a rotary damper, a resistance motor or a reduction gearbox.
Preferably, the test bench is provided with a guide rail part for sliding connection of the adjusting frame, the end part of the guide rail part, which is far away from the driving pulley, is provided with a bogie, the bogie is suspended and provided with a counterweight disc, a flexible connecting body is connected between the counterweight disc and the adjusting frame, and the bogie is rotationally connected with a steering wheel which is in interference fit with the flexible connecting body.
Under the guidance of a steering wheel, the counterweight plate pulls the driven belt wheel away from the driving belt wheel along the horizontal direction through the flexible connecting body so that the synchronous belt to be tested is in tensioning fit between the driving belt wheel and the driven belt wheel
Preferably, the drive mechanism includes power shaft, second drive belt and drive cam, the power shaft rotate connect in the bottom of testboard, the first end of power shaft with the movable part of rotating electrical machines all is provided with the second band pulley, the second drive belt cover is located two between the second band pulley, the second drive belt with the second band pulley meshes mutually, the testboard link up and have the confession the movable hole of second drive belt activity, drive cam be the eccentric wheel and detachable connect in the second end of power shaft, the testboard link up and have the confession the movable groove that the jacking piece slides and connects, the bottom of testboard is provided with the direction shell, the inner chamber of direction shell with the movable groove is linked together, drive cam with the lower extreme of jacking piece all move in the inner chamber of direction shell, the lower extreme of jacking piece link up and have the drive hole, the inner hole wall of drive hole with the outer wall of drive cam is inconsistent.
Preferably, the lower extreme of jacking spare includes the stroke piece, the drive hole link up in the stroke piece, the inner chamber of direction shell includes travel groove and the mounting groove that is linked together, the stroke piece slide connect in the travel inslot, the mounting groove is located travel groove's top department and be provided with the second elastic component, the second elastic component acts on the mounting groove with between the stroke piece.
On the other hand, the utility model also provides a method for testing the fatigue of the synchronous belt of the bicycle, which adopts the testing device to test the fatigue of the synchronous belt to be tested and comprises the following steps:
s1, sleeving a synchronous belt to be detected on the driving belt wheel and the driven belt wheel, and presetting the simulation mileage of the synchronous belt to be detected through a control device;
s2, moving the position of the synchronous belt loading device on the test bench, and adjusting the distance between the driving belt pulley and the driven belt pulley to enable the synchronous belt to be tested to be in tensioning fit between the driving belt pulley and the driven belt pulley;
s3, switching the driving belt pulley to an initial position or a swing position through a belt pulley shifting device according to requirements;
s4, starting a rotating motor to enable the driving belt pulley to rotate and synchronously drive the driven belt pulley to rotate through the synchronous belt to be detected, and enabling the induction receiver to record the number of turns of the driving belt pulley and feed back the number of turns of the driving belt pulley to a control processing module of the control device, and feeding back the number of turns of the driving belt pulley to a display module after data processing, so that real-time movement mileage of the synchronous belt to be detected can be observed directly;
s5, providing resistance to the rotation of the driven belt wheel through a synchronous belt load device so as to simulate the load running condition of the synchronous belt to be tested;
s6, abutting the synchronous belt to be tested through a synchronous belt stretching device to enable the synchronous belt to be stretched and deformed in the running process;
and S7, the control device is provided with a timing module, so that the interval start and stop of the rotating motor are controlled, the stop time of the rotating motor is set to be 3S, the start time of the rotating motor is set to be 10S, the continuous cyclic test is carried out, the control processing module of the control device carries out data analysis on the mileage of the synchronous belt to be tested and the preset simulated mileage until the real-time mileage of the synchronous belt to be tested reaches the preset simulated mileage, the control device stops the rotating motor, and the synchronous belt to be tested is taken out to observe the damage condition of the surface of the synchronous belt to be tested.
Compared with the prior art, the novel beneficial effect of this use is:
1. according to the utility model, the driving belt wheel is driven to rotate through the rotating motor and the driven belt wheel is driven to rotate through the synchronous belt to be tested, the belt wheel shifting device is linked with the movable part of the rotating motor, so that the driving belt wheel rotates at the initial position to simulate the running condition of the synchronous belt to be tested on the horizontal road condition, or the driving belt wheel swings back and forth at the swinging position and rotates to simulate the running condition of the synchronous belt to be tested on the bumpy road condition, in the process, the synchronous belt loading device applies resistance to the rotation of the driven belt wheel to simulate the load running condition of the synchronous belt to be tested when the bicycle runs, and the synchronous belt stretching device is linked with the movable part of the rotating motor through the transmission mechanism, so that the lifting piece pushes up the synchronous belt to be tested to simulate the running condition of the obstacle to be tested against the synchronous belt to be tested, and the accuracy of the test result is improved.
2. The device can test multiple road conditions, and the belt wheel deviation device and the synchronous belt stretching device can be linked through the rotating motor, so that the cost of the device is reduced, the applicability is good, and the use and the operation are convenient.
Drawings
FIG. 1 is a schematic diagram of the test apparatus according to the first embodiment;
FIG. 2 is a schematic diagram of a second embodiment of the test apparatus;
FIG. 3 is a cross-sectional view of the test device with the guide disc held in an initial position in an embodiment;
FIG. 4 is a cross-sectional view of the pulley displacement device of the embodiment shown with the guide disc held in the swing position;
FIG. 5 is a second cross-sectional view of the wheeled displacement device of the embodiment with the guide disc held in the swung position;
FIG. 6 is a cross-sectional view of a timing belt stretching apparatus in an embodiment;
fig. 7 is a sectional view of a synchronous belt stretching device in the second embodiment.
In the figure: 1. a test bench; 2. a control device; 3. a synchronous belt driving device; 31. a driving pulley; 32. a driven pulley; 33. a rotating electric machine; 4. a pulley shifting device; 41. centering shaft; 42. a drive plate; 43. a guide disc; 44. a first elastic member; 45. an adjusting member; 5. a synchronous belt loading device; 51. an adjusting frame; 52. a resistance device; 6. a synchronous belt stretching device; 61. a jacking member; 62. a transmission mechanism; 621. a power shaft; 622. a second belt; 623. a driving cam; 7. a speed measuring device; 71. a first speed sensor; 72. a second speed sensor; 8. a synchronous belt to be tested; 9. an inductive receiver; 10. a connecting frame; 11. a connection part; 12. connecting sleeves; 13. abutting the column; 14. an extension shaft; 15. a first pulley; 16. a first belt; 17. a guide rail member; 18. a bogie; 19. a weight plate; 20. a ductile connector; 21. a steering wheel; 22. a second pulley; 23. a movable hole; 24. a movable groove; 25. a guide housing; 26. a drive hole; 27. a travel block; 28. a travel groove; 29. a mounting groove; 30. a second elastic member; 31. and a cooling device.
Detailed Description
The utility model is further described below by way of examples with reference to the accompanying drawings.
Referring to fig. 1 to 7, a bicycle synchronous belt fatigue testing device comprises a testing table 1, a simulation assembly and a control device 2, wherein the simulation assembly and the control device are arranged on the testing table 1, the simulation assembly comprises a synchronous belt driving device 3, a belt pulley shifting device 4, a synchronous belt loading device 5, a synchronous belt stretching device 6 and a speed measuring device 7, all devices of the simulation assembly are connected with and controlled by the control device 2, and the control device 2 is provided with a timing module, a display module and a control processing module;
the synchronous belt driving device 3 comprises a driving belt pulley 31, a driven belt pulley 32 and a rotating motor 33, wherein the inner diameter of the driving belt pulley 31 is larger than that of the driven belt pulley 32, a synchronous belt 8 to be detected is sleeved between the driving belt pulley 31 and the driven belt pulley 32, the rotating motor 33 is electrically connected with the control device 2, the driving belt pulley 31 is provided with an induction end, an induction receiver 9 is arranged at a position, close to the driving belt pulley 31, on the test bench 1, the induction receiver 9 can be a metal inductor, the induction end is induction metal, the induction receiver 9 is in inductive fit with the induction end, and the induction receiver 9 is electrically connected with the control device 2.
The pulley offset device 4 comprises a centering shaft 41, a driving disc 42, a guide disc 43, a first elastic piece 44 and an adjusting piece 45, wherein the connecting frame 10 is arranged on the test bench 1, the centering shaft 41 is rotationally connected in the connecting frame 10 and is connected with a movable part of the rotating motor 33, the guide disc 43 and the driving disc 42 are arranged at intervals, the driving pulley 31 is positioned between the guide disc 43 and the driving disc 42, the driving pulley 31 is in sleeved fit with the centering shaft 41, the driving disc 42 is connected with the centering shaft 41, the driving disc 42 is symmetrically provided with two connecting parts 11, the two connecting parts 11 are arranged at intervals with the centering shaft 41, the inside of the driving pulley 31 is hollow and is provided with a connecting sleeve 12 for the connecting parts 11 to be sleeved and matched, so that the driving pulley 31 is guided to horizontally swing along the axial direction of the centering shaft 41 between the guide disc 43 and the driving disc 42, and when the rotating motor 33 is started, the movable part of the rotating motor 33 drives the driving disc 42 to rotate, and the driving pulley 31 is driven by the connecting parts 11 to synchronously rotate.
The driving pulley 31 is close to the side wall of the guide disc 43 and is provided with an abutting column 13, the abutting column 13 is an induction end, a first elastic piece 44 acts between the driving pulley 31 and the driving pulley 42, the driving pulley 31 moves along the axial direction of the centering shaft 41 and is close to the guide disc 43, the abutting column 13 is kept against the guide disc 43, the upper part of the guide disc 43 is provided with a hinge seat which is movably connected in the connecting frame 10, the connecting frame 10 and the upper part of the guide disc 43 are provided with hinge joints, the guide disc 43 is movably hinged in the connecting frame 10, the middle part of the guide disc 43 is penetrated for the centering shaft 41 to move relatively, an adjusting piece 45 is connected to the connecting frame 10 in a threaded manner, the end part of the adjusting piece 45 penetrates through the connecting frame 10 to be matched with the lower part of the guide disc 43, and the adjusting piece 45 is screwed in or out of the adjusting piece 45 so that the surface of the end part of the connecting frame 10 is in contact with the guide disc 43, and the driving pulley 31 is driven to rotate at the initial position or move back and forth at the swinging position and rotate;
when the adjusting member 45 is screwed into the connecting frame 10, the length of the end of the adjusting member 45 is equal to the distance between the upper portion of the guiding disc 43 and the inner side wall of the connecting frame 10, the lower portion of the guiding disc 43 is kept at the initial position under the support of the adjusting member 45 to maintain the parallel of the guiding disc 43 and the opposite side of the driving pulley 31, and the driving pulley 31 is positioned and rotated on the centering shaft 41 to simulate the running condition of the synchronous belt 8 to be tested on the plane road condition;
when the length of the end portion of the adjusting member 45 screwed into the connecting frame 10 is greater than the distance between the upper portion of the guiding disc 43 and the inner side wall of the connecting frame 10, the lower portion of the guiding disc 43 is kept at the swinging position under the support of the adjusting member 45 so as to maintain the intersection of the guiding disc 43 and the plane on which the opposite side of the driving pulley 31 is located, under the action of the first elastic member 44, the abutting column always abuts against the guiding disc 43, and the driving pulley 31 axially translates and rotates back and forth on the centering shaft 41 so as to simulate the running condition that the synchronous belt 8 to be tested is driven by the driving pulley 31 to deviate on bumpy road conditions.
The synchronous belt loading device 5 comprises an adjusting frame 51 and a resistance device 52 arranged on the adjusting frame 51, the adjusting frame 51 is rotationally connected with the extension shaft 14, the driven pulley 32 is connected with the first end of the extension shaft 14, the resistance device 52 can be a rotary damper, a resistance motor or a reduction gear box, the movable end of the resistance device 52 and the second end of the extension shaft 14 are both provided with first pulleys 15, a first driving belt 16 is sleeved between the two first pulleys 15, the first driving belt 16 is meshed with the first pulleys 15, synchronous belt transmission of the driven pulley 32 and the resistance device 52 is achieved, and preferably, chain transmission can be achieved between the first driving belt 16 and the first pulleys 15. The resistance device 52 applies resistance to the driven belt wheel 32 to simulate the running condition of the synchronous belt 8 to be tested when different loads are borne on horizontal road conditions or bumpy road conditions, the test device also comprises a cooling device 31, the cooling device 31 adopts a water cooling mode to cool the resistance device 52 to avoid overload scalding, and the prior art is not described in detail herein;
the test bench 1 is provided with a guide rail member 17 for sliding connection of the adjusting frame 51, the end part of the guide rail member 17 far away from the driving belt pulley 31 is provided with a bogie 18, the bogie 18 is suspended and provided with a counterweight disc 19, a flexible connecting body 20 is connected between the counterweight disc 19 and the adjusting frame 51, the bogie 18 is rotationally connected with a steering wheel 21 which is in interference fit with the flexible connecting body 20, and the counterweight disc 19 can load heavy objects with corresponding weight according to the tensioning requirement of the synchronous belt 8 to be tested, so that the driven belt pulley 32 is pulled by the flexible connecting body 20 to be far away from the driving belt pulley 31 along the horizontal direction, and the synchronous belt 8 to be tested is in tensioning fit between the driving belt pulley 31 and the driven belt pulley 32.
The synchronous belt stretching device 6 comprises a jacking piece 61 and a transmission mechanism 62, the transmission mechanism 62 is linked with the movable part of the rotating motor 33, the test bench 1 is communicated with a movable groove 24 for the jacking piece 61 to slide and connect, the jacking piece 61 is guided to push out and retract, the jacking piece 61 is movably connected between the test bench 1 corresponding to the driving pulley 31 and the driven pulley 32, the transmission mechanism 62 comprises a power shaft 621, a second transmission belt 622 and a driving cam 623, the power shaft 621 is rotatably connected to the bottom of the test bench 1, the first end of the power shaft 621 and the movable part of the rotating motor 33 are respectively provided with a second pulley 22, the second transmission belt 622 is sleeved between the two second pulleys 22, the second transmission belt 622 is meshed with the second pulleys 22, synchronous belt transmission of the power shaft 621 and the rotating motor 33 is realized, and preferably, chain transmission can be realized between the second transmission belt 622 and the second pulleys 22. The test bench 1 is communicated with a movable hole 23 for the second transmission belt 622 to move, the driving cam 623 is an eccentric wheel and is detachably connected to the second end of the power shaft 621, the bottom of the test bench 1 is provided with a guide shell 25, the inner cavity of the guide shell 25 is communicated with the movable groove 24, the lower ends of the driving cam 623 and the jacking piece 61 are both movable in the inner cavity of the guide shell 25, the lower end of the jacking piece 61 is communicated with a driving hole 26, the lower end of the jacking piece 61 comprises a stroke block 27, the driving hole 26 is communicated with the stroke block 27, the inner cavity of the guide shell 25 comprises a stroke groove 28 and a mounting groove 29 which are communicated, the stroke block 27 is slidably connected in the stroke groove 28, the mounting groove 29 is positioned above the stroke groove 28 and is provided with a second elastic piece 30, the second elastic piece 30 acts between the mounting groove 29 and the stroke block 27, the inner wall of the top of the mounting groove 29 forms the inner side wall of the bottom of the test bench 1, and the opposite side of the bottom inner side wall of the test bench 1 and the stroke block 27 are provided with a bulge for the second elastic piece 30 to be sleeved.
When the rotating motor 33 is started, the rotating motor 33 drives the power shaft 621 to rotate through the second transmission belt 622, the power shaft 621 drives the driving cam 623 to rotate, the upper part of the lifting piece 61 is a spool, under the action of the second elastic piece 30, the stroke block 27 has a trend of being far away from the spool, the inner hole wall of the driving hole 26 is abutted against the outer wall of the driving cam 623, the driving cam 623 drives the stroke block 27 to circularly move up and down for many times along the vertical direction by utilizing eccentric wheel transmission, and the lifting piece 61 is abutted against the synchronous belt 8 to be tested to enable the synchronous belt 8 to be stretched and deformed when being ejected out, so that the situation that the synchronous belt 8 to be tested is repeatedly collided by obstacles on horizontal road conditions or bumpy road conditions to be stretched is simulated.
According to the utility model, the driving belt wheel 31 is driven to rotate through the rotating motor 33, the driven belt wheel 32 is driven to rotate through the synchronous belt 8 to be tested, and the synchronous belt load device 5 applies resistance to the rotation of the driven belt wheel 32 to simulate the load running condition of the synchronous belt 8 to be tested when the bicycle runs;
the pulley shifting device 4 is linked with the movable part of the rotating motor 33, so that the driving pulley 31 rotates at an initial position to simulate the running condition of the synchronous belt 8 to be tested on the horizontal road condition, or the driving pulley 31 swings back and forth at a swinging position and rotates to simulate the running condition of the synchronous belt 8 to be tested on the bumpy road condition;
in the process, the synchronous belt stretching device 6 is linked with the movable part of the rotating motor 33 through the transmission mechanism 62, so that the lifting piece 61 is propped up against the synchronous belt 8 to be tested to simulate the operation condition of the obstacle against the synchronous belt 8 to be tested, the stretching fatigue test of the synchronous belt 8 to be tested in horizontal road conditions or bumpy road conditions can be simulated according to requirements, and the accuracy of the test result is improved.
The device can test multiple road conditions, the belt wheel deviation device 4 and the synchronous belt stretching device 6 can be linked through the rotating motor 33, the device cost is reduced, the applicability is good, and the use and the operation are convenient.
The speed measuring device 7 includes a first speed sensor 71 and a second speed sensor 72, the control device 2 controls the collection of the first speed sensor 71 and the second speed sensor 72, the first speed sensing device is installed at the movable portion of the connecting frame 10 corresponding to the rotating motor 33 to detect the rotation speed of the driving pulley 31, and the second speed sensing device is installed at the movable frame corresponding to the extending shaft 14 to detect the rotation speed of the driven pulley 32. The first speed sensor 71 and the second speed sensor 72 feed back sensed speed data to the control processing module of the control device 2, and feed back the sensed speed data to the display module after data processing, so that the rotational speeds of the driving pulley 31 and the driven pulley 32 can be directly observed.
The method for testing the fatigue of the synchronous belt of the bicycle adopts the testing device to test the fatigue of the synchronous belt 8 to be tested, and comprises the following steps:
s1, sleeving a synchronous belt 8 to be tested on a driving belt pulley 31 and a driven belt pulley 32, and presetting a simulation mileage of the synchronous belt 8 to be tested by a control device 2, wherein the preset value is preferably the number of turns of the driving belt pulley 31 required to rotate when the synchronous belt 8 to be tested runs to the simulation mileage;
s2, moving the position of the synchronous belt loading device 5 on the test bench 1, and adjusting the distance between the driving belt pulley 31 and the driven belt pulley 32 to enable the synchronous belt 8 to be tested to be in tensioning fit between the driving belt pulley 31 and the driven belt pulley 32;
s3, switching the driving pulley 31 to an initial position or a swing position through the pulley shifting device 4 according to requirements;
s4, starting a rotating motor 33, so that the driving belt wheel 31 rotates and synchronously drives the driven belt wheel 32 to rotate through the synchronous belt 8 to be detected, recording the rotation number of the driving belt wheel 31 by the induction receiver 9, feeding back to a control processing module of the control device 2, feeding back to a display module after data processing, and facilitating direct observation of real-time movement mileage of the synchronous belt 8 to be detected;
s5, providing resistance to the rotation of the driven belt pulley 32 through the synchronous belt load device 5 so as to simulate the load running condition of the synchronous belt 8 to be tested;
s6, abutting the synchronous belt 8 to be tested through the synchronous belt stretching device 6 to enable the synchronous belt 8 to be stretched and deformed in the running process so as to simulate the condition of multiple collisions between the synchronous belt 8 to be tested and an obstacle during running;
and S7, the control device 2 is provided with a timing module, so that the rotating motor 33 is controlled to start and stop at intervals, the stop time of the rotating motor 33 is set to be 3S, the start time of the rotating motor 33 is set to be 10S, the continuous cyclic test is carried out, the control processing module of the control device 2 carries out data analysis on the mileage of the synchronous belt 8 to be tested and the preset simulated mileage until the real-time mileage of the synchronous belt 8 to be tested reaches the preset simulated mileage, the control device 2 stops the rotating motor 33, and the synchronous belt 8 to be tested is taken out to observe the damage condition of the surface of the synchronous belt 8 to be tested, so that the detection result of the fatigue performance of the synchronous belt 8 to be tested is obtained.
Preferably, the detection device can also obtain the detection result of the fatigue performance of the synchronous belt 8 to be detected by adopting a data comparison mode, in the bicycle, the driving pulley 31 is a driving pulley with a larger diameter, the driven pulley 32 is a driven pulley with a smaller diameter, the driving pulley 31 synchronously drives the driven pulley 32 to rotate through the synchronous belt 8 to be detected, the power of the rotation of the driven pulley 32 is transmitted by the synchronous belt 8 to be detected, under the ideal state of the synchronous belt 8 to be detected, the linear speed of the driving pulley 31 is equal to that of the driven pulley 32, the power output is provided by driving the rotation of the driving pulley 31 to simulate the accelerated running of the bicycle, the number of teeth of the outer diameter of the driving pulley 31 is Z1, the number of teeth of the outer diameter of the driven pulley 32 is Z2, the constant transmission ratio of the synchronous belt 8 to be detected under the ideal state is i1=Z1/Z2, the speed measuring device 7 respectively detects the rotation speeds of the driving pulley 31 and the driven pulley 32, the rotation speed of the driving pulley 31 is a, the rotation speed of the driven pulley 32 is b, if the rotation speed of the synchronous belt 8 to be detected is fatigue, the driving effect of the driven pulley 32 is poor, the rotation speed b of the driven pulley 32 is affected, the rotation speed of the driven pulley 32 is detected, and the fatigue wear of the synchronous belt is detected according to the rotation speed b of the synchronous belt 32, the driving ratio is detected, the accurate fatigue performance is detected, and the fatigue performance is obtained according to whether the rotation of the rotation ratio between the driving pulley 31 is more than the rotation of the driving pulley 31 is better than the constant, and the constant, the constant transmission ratio is detected, and the speed is detected, and the fatigue performance is detected.
Of course, the above is only a typical example of the utility model, and other embodiments of the utility model are also possible, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the utility model claimed.
Claims (10)
1. A bicycle hold-in range fatigue test device, characterized by: the device comprises a test table (1), a simulation assembly and a control device (2), wherein the simulation assembly and the control device are arranged on the test table (1), the simulation assembly comprises a synchronous belt driving device (3), a belt pulley shifting device (4), a synchronous belt loading device (5), a synchronous belt stretching device (6) and a speed measuring device (7), all devices of the simulation assembly are connected with and controlled by the control device (2), and the control device (2) is provided with a timing module, a display module and a control processing module;
the synchronous belt driving device (3) comprises a driving belt wheel (31), a driven belt wheel (32) and a rotating motor (33), wherein a synchronous belt (8) to be detected is sleeved between the driving belt wheel (31) and the driven belt wheel (32), the rotating motor (33) is electrically connected with the control device (2), the driving belt wheel (31) is provided with an induction end, an induction receiver (9) in inductive fit with the induction end is arranged on the test bench (1) at a position close to the driving belt wheel (31), and the induction receiver (9) is electrically connected with the control device (2);
the belt wheel deviation device (4) is arranged on the movable part of the rotating motor (33) and is used for driving the driving belt wheel (31) to rotate at an initial position or to move back and forth at a swinging position and rotate;
the synchronous belt loading device (5) is movably connected to the test bench (1), and the synchronous belt loading device (5) is connected with the driven belt pulley (32) and is used for applying resistance to the driven belt pulley (32) and enabling the synchronous belt (8) to be tested to be in tensioning fit between the driving belt pulley (31) and the driven belt pulley (32);
the synchronous belt stretching device (6) comprises a jacking piece (61) and a transmission mechanism (62), wherein the jacking piece (61) is movably connected between the test bench (1) and corresponds to the position between the driving belt wheel (31) and the driven belt wheel (32), and the transmission mechanism (62) is linked with the movable part of the rotating motor (33) and is used for driving the jacking piece (61) to move up and down and driving the synchronous belt (8) to be tested to stretch and deform;
the speed measuring device (7) comprises a first speed sensor (71) and a second speed sensor (72) for respectively detecting the rotation speeds of the driving pulley (31) and the driven pulley (32), and the control device (2) controls the acquisition of the first speed sensor (71) and the second speed sensor (72).
2. The bicycle synchronous belt fatigue testing device according to claim 1, wherein: the inner diameter of the driving pulley (31) is larger than the inner diameter of the driven pulley (32).
3. The bicycle synchronous belt fatigue testing device according to claim 2, wherein: the pulley offset device (4) comprises a centering shaft (41) and a driving disc (42), wherein a connecting frame (10) is arranged on the test bench (1), the centering shaft (41) is rotationally connected in the connecting frame (10) and connected with a movable part of the rotating motor (33), the driving pulley (31) is in sleeve joint fit with the centering shaft (41), the driving disc (42) is connected with the centering shaft (41), the driving disc (42) is provided with at least one connecting part (11) which is arranged at intervals with the centering shaft (41), and a connecting sleeve (12) which is used for sleeve joint fit with the connecting part (11) is hollow in the driving pulley (31).
4. The bicycle synchronous belt fatigue testing device according to claim 3, wherein: the pulley shifting device (4) further comprises
The driving pulley (31) is positioned between the guide disc (43) and the driving disc (42), an abutting column (13) is arranged on the side wall, close to the guide disc (43), of the driving pulley (31), and the first elastic piece (44) acts between the driving disc (42) and the driving pulley (31) to enable the driving pulley (31) to move along the axial direction of the centering shaft (41) and close to the guide disc (43), and the abutting column (13) is in contact with the guide disc (43);
the upper portion of guide disc (43) is provided with swing joint in link (10), the middle part of guide disc (43) link up for centering shaft (41) relative activity, adjustment spare (45) threaded connection in on link (10), adjustment spare (45) pass the tip of link (10) with the lower part cooperation of guide disc (43).
5. The bicycle synchronous belt fatigue testing device according to claim 2, wherein: the synchronous belt loading device (5) comprises an adjusting frame (51) and resistance equipment (52) arranged on the adjusting frame (51), the adjusting frame (51) is rotationally connected with an extending shaft (14), a driven belt wheel (32) is connected with a first end of the extending shaft (14), a first belt wheel (15) is arranged at a movable end of the resistance equipment (52) and a second end of the extending shaft (14), a first driving belt (16) is sleeved between the two first belt wheels (15), and the first driving belt (16) is meshed with the first belt wheels (15).
6. The bicycle synchronous belt fatigue testing device according to claim 5, wherein: the resistance device (52) may be a rotary damper, a resistance motor, or a reduction gearbox.
7. The bicycle synchronous belt fatigue testing device according to claim 5, wherein: be provided with on testboard (1) and supply guide rail spare (17) that adjustment frame (51) slided and connect, guide rail spare (17) keep away from the tip of driving pulley (31) is provided with bogie (18), bogie (18) unsettled be provided with balance weight dish (19), balance weight dish (19) with be connected with flexible connector (20) between adjustment frame (51), bogie (18) rotate be connected with flexible connector (20) interference fit's directive wheel (21).
8. The bicycle synchronous belt fatigue testing device according to claim 1, wherein: the utility model provides a drive mechanism (62) including power shaft (621), second drive belt (622) and drive cam (623), power shaft (621) rotate connect in the bottom of testboard (1), the first end of power shaft (621) with the movable part of rotating electrical machines (33) all is provided with second band pulley (22), second drive belt (622) cover is located two between second band pulley (22), second drive belt (622) with second band pulley (22) are engaged with, testboard (1) are run through and are supplied with movable hole (23) of second drive belt (622) activity, drive cam (623) be the eccentric wheel and detachable connect in the second end of power shaft (621), testboard (1) are link up and are supplied jack-up piece (61) slip connection's movable groove (24), the bottom of testboard (1) is provided with direction shell (25), the inner chamber of direction shell (25) with movable groove (24) are mutually engaged with second band pulley (22), the inner chamber (23) of drive cam (623) are connected with jack-up end (623) are located in jack-up end (26) inner hole (623).
9. The bicycle timing belt fatigue testing device according to claim 8, wherein: the lower extreme of jacking spare (61) include stroke piece (27), drive hole (26) link up in stroke piece (27), the inner chamber of direction shell (25) include travel groove (28) and mounting groove (29) that are linked together, stroke piece (27) slide connect in travel groove (28), mounting groove (29) are located the top department of travel groove (28) and are provided with second elastic component (30), second elastic component (30) act on between mounting groove (29) with stroke piece (27).
10. A fatigue test method for a bicycle synchronous belt is characterized by comprising the following steps: fatigue testing of a synchronous belt (8) to be tested with a bicycle synchronous belt fatigue testing device according to any of claims 1-8, comprising the steps of:
s1, sleeving a synchronous belt (8) to be detected on a driving belt wheel (31) and a driven belt wheel (32), and presetting the simulation mileage of the synchronous belt (8) to be detected through a control device (2);
s2, moving the position of the synchronous belt loading device (5) on the test bench (1), and adjusting the distance between the driving belt pulley (31) and the driven belt pulley (32) to enable the synchronous belt (8) to be tested to be in tensioning fit between the driving belt pulley (31) and the driven belt pulley (32);
s3, switching the driving pulley (31) to an initial position or a swing position through a pulley shifting device (4) according to requirements;
s4, starting a rotating motor (33) to enable the driving belt wheel (31) to rotate and synchronously drive the driven belt wheel (32) to rotate through the synchronous belt (8) to be detected, and enabling the induction receiver (9) to record the number of rotation turns of the driving belt wheel (31) and feed the number of rotation turns back to a control processing module of the control device (2) and feed the number of rotation turns back to a display module after data processing, so that real-time movement mileage of the synchronous belt (8) to be detected can be observed directly;
s5, providing resistance to the rotation of the driven belt wheel (32) through the synchronous belt load device (5) so as to simulate the load running condition of the synchronous belt (8) to be tested;
s6, abutting the synchronous belt (8) to be tested through a synchronous belt stretching device (6) to enable the synchronous belt to be stretched and deformed in the running process;
s7, the control device (2) is provided with a timing module, so that the rotating motor (33) is controlled to start and stop at intervals, the stop time of the rotating motor (33) is set to be 3S, the start time of the rotating motor (33) is set to be 10S, the continuous circulation test is carried out, the control processing module of the control device (2) carries out data analysis on the mileage of the synchronous belt (8) to be tested and the preset simulated mileage until the real-time mileage of the synchronous belt (8) to be tested reaches the preset simulated mileage, the control device (2) stops the rotating motor (33), and the synchronous belt (8) to be tested is taken out to observe the damage condition of the surface of the synchronous belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311413264.5A CN117309647A (en) | 2023-10-26 | 2023-10-26 | Bicycle synchronous belt fatigue testing device and testing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311413264.5A CN117309647A (en) | 2023-10-26 | 2023-10-26 | Bicycle synchronous belt fatigue testing device and testing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118758598A (en) * | 2024-09-09 | 2024-10-11 | 长春大学 | Synchronous belt error measuring device |
| CN119290383A (en) * | 2024-12-10 | 2025-01-10 | 青岛征和链传动有限公司 | A chain durability test bench and test method |
-
2023
- 2023-10-26 CN CN202311413264.5A patent/CN117309647A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118758598A (en) * | 2024-09-09 | 2024-10-11 | 长春大学 | Synchronous belt error measuring device |
| CN119290383A (en) * | 2024-12-10 | 2025-01-10 | 青岛征和链传动有限公司 | A chain durability test bench and test method |
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