Device and method for detecting durability of electric bicycle

Abstract

The invention relates to the technical field of electric bicycle detection, in particular to an electric bicycle durability detection device and method, and the device comprises a test road surface, an adjusting mechanism, a counterweight unit and a clamping mechanism. The counterweight unit is fixedly arranged on the bicycle frame to simulate different load conditions of the bicycle frame in the actual use process, then the driving set drives the bicycle frame to move along the test ground, the arc-shaped section of the test ground simulates uphill and downhill of the electric bicycle, and various different types of road conditions are set on the test ground. The testing process is more suitable for the actual use condition, the large deviation of the durability detection result caused by the large deviation between the testing environment and the actual use condition is reduced, the frame exchange testing road surface is subjected to comparison testing after each group of testing, the testing deviation is further reduced, and the testing efficiency is improved. Various road conditions possibly encountered by the electric bicycle in actual use are simulated, so that the durability detection result of the frame is more practical, more representative and more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of electric bicycle detection, and in particular to an electric bicycle durability detection device and method. Background Art

[0002] The durability test of electric bicycles is a comprehensive process used to evaluate the reliability and safety of vehicles in long-term use. The durability test of electric bicycles includes battery life, motor performance, transmission system and frame durability. The frame of the electric bicycle (hereinafter referred to as the frame, see Fig. 9 )Durability is one of the important criteria for measuring the quality of electric bicycles.

[0003] The existing frame durability test is mainly carried out by an electric bicycle frame front fork vibration tester to simulate the vibration of the frame during the driving of the electric bicycle. After the frame has vibrated a certain number of times, whether there is deformation and cracks on the frame is observed.

[0004] The above-mentioned frame testing process has the following deficiencies: the durability test of the frame using a vibration testing machine in the laboratory is difficult to fully simulate the complex road conditions and environmental factors in actual use, such as rugged roads, and the change in the center of gravity of the load when the vehicle goes uphill or downhill, which causes the corresponding change in the force position of the frame, resulting in a larger deviation between the durability of the frame in actual use and the results obtained in the laboratory test. Summary of the invention

[0005] Based on this, it is necessary to provide an electric bicycle durability detection device and method to solve the above technical problems.

[0006] The present application provides an electric bicycle durability testing device, comprising: a test ground, the test ground being divided from left to right into a horizontal section, an arc section with an axis at the top, and a horizontal section, the test ground being provided with a plurality of different types of ground from front to back, the upper end surfaces of the two horizontal sections of the test ground being fixed with two vertical fixed rods symmetrically distributed front to back, a rectangular frame being fixedly provided between the four vertical fixed rods, a sliding plate being slidably provided on the front and rear sections of the rectangular frame, a plurality of sliding rods with axes extending from top to bottom slidingly passing through the sliding plate, and a rectangular block being fixedly provided on the lower end surface of the sliding rod.

[0007] A support plate is arranged directly below the rectangular block, a clamping mechanism for limiting and clamping the frame is arranged on the support plate, and an adjusting mechanism is arranged on the support plate.

[0008] The adjustment mechanism includes a guide rail, a guide rail with the same shape as the test ground is slidably arranged between two vertical fixed rods opposite to each other on the left and right, a moving block is slidably arranged on the guide rail, a connecting rod is rotated and penetrated through the two moving blocks opposite to each other in the front and rear, and the connecting rod rotates and penetrates the rectangular block, a lifting group is arranged between the guide rail and the rectangular frame, a driving group for driving the sliding plate to move left and right is arranged on the rectangular frame, a rotating group for driving the frame to rotate is arranged on the bracket plate, and a counterweight unit is arranged below the bracket plate.

[0009] According to a favorable embodiment, the counterweight unit includes a placement box, a placement box is arranged below the bracket plate, a plurality of placement slots are arranged in the placement box, counterweight blocks are placed in the placement slots, a fixing group for connecting the placement box to the frame is arranged on the placement box, the fixing group includes a fixing rod, two fixing rods symmetrically distributed front and back are fixedly arranged on the right end face of the placement box, a section of the fixing rod away from the placement box is hinged with two clamping claws 1, a spring telescopic rod 1 is hinged on the end face of the placement box away from the fixed rod, the telescopic end of the spring telescopic rod 1 is hinged with two clamping claws 2, threaded grooves are provided on the hinged section of the spring telescopic rod 1 and the fixing rod, the spring telescopic rod 1 and the fixing rod are both provided with a rotating cylinder threadedly connected to the threaded groove, four matrix-distributed clamping groups are arranged on the lower end face of the placement box, each clamping group includes two spring pieces symmetrically distributed front and back, and the two spring pieces in the same clamping group are divided into arc sections and inclined sections away from each other from top to bottom.

[0010] According to a favorable embodiment, the clamping mechanism includes a clamping group 1, which includes a fixed cylinder, a fixed cylinder is fixedly passed through the bracket plate, a gear 1 is rotatably provided on the upper end of the fixed cylinder, two connecting strips 1 that are symmetrical about the fixed cylinder are slidably passed through the bracket plate, an arc-shaped clamping plate is fixedly provided on the lower end surface of the connecting strip 1, a rack 1 meshing with the gear 1 is fixedly provided on the connecting strip 1, a rotating column is slidably passed through the gear 1, a strip-shaped protrusion is provided on the rotating column, a plurality of positioning grooves cooperating with the protrusions are opened on the fixed cylinder, and a handle is fixedly provided on the upper end surface of the rotating column.

[0011] According to a favorable embodiment, a clamping group 2 is provided on the bracket plate, and the clamping group 2 includes a gear 2. The upper end surface of the bracket plate is provided with a gear 2 located on the right side of the gear 1 through the rotation of the transmission shaft. Two connecting strips 2 are slidably penetrated through the bracket plate and are centrally symmetrical with respect to the transmission shaft. A limiting cylinder is fixedly provided on the lower end surface of the connecting strip 2. The limiting cylinder is divided into a conical section and a cylindrical section in sequence from the side close to the gear 2 to the direction away from the gear 2, and the large diameter end of the conical section of the limiting cylinder is located on the side close to the gear 2. Racks 2 meshing with the gear 2 are respectively fixedly provided on the two connecting strips 2, and racks 3 meshing with the gear 1 are fixedly provided on the connecting strip 2 through transverse strips.

[0012] According to a favorable embodiment, a spring telescopic rod 2 is fixedly provided on the lower end surface of the rectangular block, a rotating disk is hinged at the telescopic end of the spring telescopic rod 2, a raising platform is rotatably provided on the lower end surface of the rotating disk, and the raising platform is fixedly connected to the bracket plate.

[0013] According to a favorable embodiment, the lifting group includes a screw rod, and two screw rods symmetrically distributed on the left and right are rotated and penetrated on the front and rear sections of the rectangular frame. The screw rods penetrate the guide rails and are threadedly connected to the guide rails. The upper end surface of the rectangular frame is provided with multiple motors corresponding to the screw rods one by one, and the screw rods are fixedly connected to the output shaft of the motor.

[0014] According to a favorable embodiment, the driving group includes a rotating shaft, and the front and rear end surfaces of the rectangular frame are both rotatably provided with two rotating shafts symmetrically distributed on the left and right. A winding wheel is fixedly sleeved on the rotating shaft, and a rope is wound on the winding wheel. One end of the rope is fixedly connected to the winding wheel, and the other end of the rope is fixedly connected to the corresponding end surface of the sliding plate. Motor 2 is provided on the opposite back surfaces of the two front and rear relatively vertical fixed rods through a connecting plate, and motor 2 is connected to the rotating shaft.

[0015] According to a favorable embodiment, the rotating group includes a vertical bar, and two vertical bars symmetrically distributed on the left and right are fixedly provided on the opposite surfaces of the two guide rails. A vertical groove is penetrated by the vertical bar, and an electric slider 1 is slidably provided in the vertical groove. A lifting plate is fixedly provided between the front and rear opposite electric sliders 1, and a gear 3 mounted on the corresponding rotating disk is fixedly provided on the upper end surface of the raising platform, and a plurality of racks 4 respectively meshing with the corresponding gear 3 are fixedly provided on the opposite surfaces of the two lifting plates.

[0016] According to a favorable embodiment, a positioning group is provided on the raising platform, and the positioning group includes a fixed block, and two fixed blocks symmetrically distributed in the circumferential direction are fixedly provided on the rotating disk, and an inverted L-shaped plate slidingly penetrates through the raising platform on the side close to gear one, and a blocking plate is fixedly provided on the rear end face of the transverse section of the inverted L-shaped plate, and a vertical rod is slidably provided on the front end face of the inverted L-shaped plate through the transverse plate, and a positioning block is fixedly provided on the lower end face of the vertical rod, and a spring one mounted on the vertical rod is fixedly provided between the positioning block and the transverse plate.

[0017] According to a favorable embodiment, a sliding groove is provided on the heightening platform in front of the inverted L-shaped plate, and an electric slider 2 is slidably arranged in the sliding groove. The electric slider 2 and the corresponding inverted L-shaped plate are hinged together with a hinge bar.

[0018] In addition, the present invention also provides a durability testing method for an electric bicycle frame:

[0019] S1. Install the counterweight: The staff installs the counterweight box on the frame through the fixing group, and places the counterweight block in the box to simulate different load conditions of the electric bicycle.

[0020] S1. Limit clamping: The clamping group 1 is used to limit the position of the frame, while the clamping group 2 is used to limit the position of the two handlebars to simulate the rider holding the handlebars.

[0021] S1. Press the frame: The lifting group presses the frame downward through the spring telescopic rods so that the frame is always close to the ground during the test.

[0022] S1. Moving and turning: The driving group drives multiple frames to move back and forth on the test ground to compare the durability of the test frames under different road conditions. When the frames move sideways to the horizontal section of the test ground, the rotation group drives the frames to rotate and turn. The above movement and turning steps are repeated until a set of tests is completed.

[0023] S1. Exchange test: After completing multiple driving tests on the same road condition, the staff will remove the frame and observe the deformation of the frame before and after the test. Then, the frame will be exchanged to a position with different road conditions for re-testing. After all frames have completed the test on different road conditions, the test will be completed, and then the deformation of the frame before and after will be compared.

[0024] In summary, the present invention includes at least one of the following beneficial effects: in the present invention, the counterweight unit is fixedly set on the frame to simulate different load conditions of the frame during actual use, and then the frame is driven by the driving group to move along the test ground, and the arc segment of the test ground simulates the uphill and downhill of the electric bicycle and a variety of different types of road conditions are set on the test ground, so that the test process is more in line with the actual use conditions, and the large deviation of the durability test results caused by the large deviation between the test environment and the actual use conditions is reduced. After each set of tests, the frame is exchanged for a comparative test on the test road surface to further reduce the test deviation. By driving the frame to ride back and forth on uphill, downhill, smooth roads, raised roads and potholes for many times, various road conditions that may be encountered by electric bicycles in actual use are simulated, so that the durability test results of the frame are more in line with reality, more representative, and the test results are more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A three-dimensional structural schematic diagram of an electric bicycle durability detection device provided according to an embodiment of the present invention is shown.

[0027] Figure 2 The embodiment provided according to the present invention shows Figure 1 A magnified view of the structure in the middle.

[0028] Figure 3 The embodiment provided according to the present invention shows Figure 2 A magnified view of the structure at B in the middle.

[0029] Figure 4 A partial cross-sectional view of the three-dimensional structure of a counterweight unit provided according to an embodiment of the present invention is shown.

[0030] Figure 5 A partial cross-sectional view of the three-dimensional structure of a clamping mechanism and a counterweight unit provided according to an embodiment of the present invention is shown.

[0031] Figure 6 A partial cross-sectional view of a three-dimensional structure of some components of a clamping mechanism provided according to an embodiment of the present invention is shown.

[0032] Figure 7 The embodiment provided according to the present invention shows Figure 6 A magnified view of the structure at center C.

[0033] Figure 8 A partial cross-sectional view of components of a clamping assembly provided according to an embodiment of the present invention is shown.

[0034] Fig. 9 A schematic structural diagram of an electric bicycle frame as an object to be detected is shown.

[0035] The above drawings include the following reference numerals:

[0036] 1. Test ground; 10. Vertical fixed rod; 11. Rectangular frame; 12. Sliding plate; 13. Sliding rod; 14. Rectangular block; 2. Bracket plate; 3. Adjustment mechanism; 30. Guide rail; 300. Moving block; 301. Connecting rod; 31. Lifting group; 310. Screw rod; 311. Motor 1; 32. Driving group; 320. Rotating shaft; 321. Winding wheel; 322. Rope; 323. Motor 2; 33. Rotating group; 330. Vertical bar; 331. Electric slider 1; 332. Lifting plate; 333. Gear 3; 334. Rack 4; 34. Spring telescopic rod 2; 340. Rotating disk; 341. Heightening platform; 35. Positioning group; 350. Fixed block; 351. Inverted L shaped plate; 352, blocking plate; 353, vertical rod; 354, positioning block; 355, spring one; 360, electric slider two; 361, hinged strip; 4, counterweight unit; 40, placement box; 42, counterweight block; 43, fixing group; 430, fixing rod; 431, clamping claw one; 432, spring telescopic rod one; 433, clamping claw two; 435, rotating cylinder; 436, spring piece; 5, clamping mechanism; 50, clamping group one; 500, fixing cylinder; 501, gear one; 503, clamping plate; 504, rack one; 505, rotating column; 507, positioning groove; 51, clamping group two; 510, gear two; 522, limiting cylinder; 523, rack two; 524, rack three. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0038] like Figure 1 and Figure 2 As shown, an electric bicycle durability testing device comprises: a test ground 1, which is divided into a horizontal section, an arc section with an axis on top and a horizontal section from left to right, and the test ground 1 is provided with pits, protrusions and a smooth ground from front to back, and the upper end surfaces of the two horizontal sections of the test ground 1 are fixed with two vertical fixed rods 10 symmetrically distributed front and back, a rectangular frame 11 is fixedly provided between the four vertical fixed rods 10, a sliding plate 12 is slidably provided on the front and rear sections of the rectangular frame 11, and a plurality of sliding rods 13 extending from top to bottom with axes slidingly penetrate the sliding plate 12, and a rectangular block 14 is fixedly provided on the lower end surface of the sliding rod 13.

[0039] like Figure 1 and Figure 2As shown, a support plate 2 is arranged directly below the rectangular block 14 , and a clamping mechanism 5 for limiting and clamping the frame is arranged on the support plate 2 , and an adjusting mechanism 3 is arranged on the support plate 2 .

[0040] like Figure 1 and Figure 2 As shown, the adjustment mechanism 3 includes a guide rail 30, and a guide rail 30 with the same shape as the test ground 1 is slidably arranged between two vertical fixed rods 10 opposite to each other on the left and right. A moving block 300 is slidably arranged on the guide rail 30, and a connecting rod 301 is rotated and penetrated through the two moving blocks 300 opposite to each other in the front and rear, and the connecting rod 301 rotates and penetrates multiple rectangular blocks 14, and a lifting group 31 for driving the guide rail 30 to slide up and down is jointly arranged between the guide rail 30 and the rectangular frame 11, and a driving group 32 for driving the sliding plate 12 to move left and right is arranged on the rectangular frame 11, and a rotating group 33 for driving the frame to rotate is arranged on the bracket plate 2, and a counterweight unit 4 is arranged below the bracket plate 2.

[0041] like Figure 1 , Figure 4 and Figure 5 As shown, the counterweight unit 4 includes a placement box 40, a placement box 40 is arranged below the bracket plate 2, a plurality of placement slots are arranged in the placement box 40, a counterweight block 42 is placed in the placement slot, a fixing group 43 for connecting the placement box 40 to the frame is arranged on the placement box 40, the fixing group 43 includes a fixing rod 430, two fixing rods 430 symmetrically distributed front and back are fixedly arranged on the right end face of the placement box 40, a section of the fixing rod 430 away from the placement box 40 is hinged with two clamping claws 431, and the end of the placement box 40 away from the fixing rod 430 is A spring telescopic rod 432 is hinged on the surface, and the telescopic end of the spring telescopic rod 432 is hinged with two clamping claws 433. A threaded groove is provided on the hinge section of the spring telescopic rod 432 and the fixed rod 430. A rotating cylinder 435 threadedly connected to the threaded groove is provided on the spring telescopic rod 432 and the fixed rod 430. Four matrix-distributed clamping groups are provided on the lower end surface of the placement box 40, and each clamping group includes two spring pieces 436 symmetrically distributed front and back. The two spring pieces 436 in the same clamping group are divided into arc sections and inclined sections away from each other from top to bottom.

[0042] During operation, the staff places the placement box 40 on the frame of the electric bicycle (see Figure 5 ), during the placement process, the steel pipe at the corresponding position of the frame is located between the two spring pieces 436 in the same clamping group, and the two spring pieces 436 are moved away from each other through the cooperation between the inclined section of the spring piece 436 and the frame, until the steel pipe moves to the area between the arc sections of the two spring pieces 436, and the spring pieces 436 approach each other under the action of their own elastic force, so that the placement box 40 is clamped and connected to the frame.

[0043] After the placement box 40 is placed on the frame, the frame is located between the two clamping claws 431 on the same fixed rod 430. Then the staff rotates the rotating cylinder 435 on the fixed rod 430 to move the rotating cylinder 435 toward the clamping claw 431. After the rotating cylinder 435 contacts the clamping claw 431, it continues to move. The rotating cylinder 435 pushes the corresponding two clamping claws 431 to close and clamp the frame. After that, the telescopic end of the spring telescopic rod 432 is made close to the frame at the corresponding position, and then the rotating cylinder 435 on the spring telescopic rod 432 is rotated. The rotating cylinder 435 moves in the direction of the corresponding clamping claw 433 through the cooperation between the rotating cylinder 435 and the corresponding threaded groove. After the rotating cylinder 435 contacts the clamping claw 433, it continues to move. The rotating cylinder 435 pushes the corresponding two clamping claws 433 to close and clamp the frame, thereby completing the fixation of the placement box 40. Through the spring telescopic rod 432, the fixing group 43 is suitable for clamping on different types of electric bicycle frames.

[0044] After the placement box 40 is fixed, the staff places different numbers of counterweights 42 into the placement slot to simulate the situation where the electric bicycle carries different weights.

[0045] like Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the clamping mechanism 5 includes a clamping group 50, and the clamping group 50 includes a fixed cylinder 500. The bracket plate 2 is fixedly penetrated by the fixed cylinder 500, and a gear 501 is rotatably provided on the upper end of the fixed cylinder 500. Two connecting strips 1 that are symmetrical about the fixed cylinder 500 are slidably penetrated on the bracket plate 2, and an arc-shaped clamping plate 503 is fixedly provided on the lower end surface of the connecting strip 1. A rack 504 meshing with the gear 501 is fixedly provided on the connecting strip 1, and a rotating column 505 is slidably penetrated on the gear 501. The rotating column 505 is provided with a strip-shaped protrusion, and a plurality of positioning grooves 507 cooperating with the protrusions are opened on the fixed cylinder 500, and the positioning grooves 507 are evenly distributed around the circumference, and a handle is fixedly provided on the upper end surface of the rotating column 505.

[0046] like Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, the bracket plate 2 is provided with a clamping group 2 51, and the clamping group 2 51 includes a gear 2 510. The upper end surface of the bracket plate 2 is provided with a gear 2 510 located on the right side of the gear 1 501 through the rotation of the transmission shaft. Two connecting strips 2 are slidably penetrated through the bracket plate 2 and are centrally symmetrical about the transmission shaft. A limiting cylinder 522 is fixedly provided on the lower end surface of the connecting strip 2. The limiting cylinder 522 is divided into a conical section and a cylindrical section from the side close to the gear 2 510 to the direction away from the gear 2 510, and the large diameter end of the conical section of the limiting cylinder 522 is located on the side close to the gear 2 510. Racks 2 523 meshing with the gear 2 510 are respectively fixedly provided on the two connecting strips 2, and racks 3 524 meshing with the gear 1 501 are fixedly provided on the connecting strip 2 through transverse strips.

[0047] During operation, the staff places the electric bicycle frame under the bracket plate 2 and makes the handlebar of the electric bicycle frame between the two limit cylinders 522. Then the staff pulls the handle to move upward so that the protrusion separates from the corresponding positioning groove 507. Then the handle is turned to drive the rotating column 505 to rotate. The rotating column 505 drives the gear 1 501 to rotate through the protrusion, thereby driving the corresponding connecting bar 1 to approach each other through the two racks 1 504, and the connecting bar 1 drives the corresponding clamping plate 503 to move synchronously. At the same time, the transverse bar is driven to move backward through the rack 3 524, and the transverse bar drives the corresponding connecting bar 2 to move. The connecting bar 2 connected to the transverse bar drives the corresponding rack 2 523 to move synchronously, which indirectly makes the two The two connecting bars are close to each other, and the two connecting bars drive the corresponding limiting cylinders 522 to move toward each other synchronously. During the movement of the limiting cylinder 522, the position of the handlebar is guided by the conical section of the limiting cylinder 522. When the limiting cylinder 522 moves until the cylindrical section is sleeved on the handlebar position, the handlebar is limited by the cooperation between the two limiting cylinders 522, and the clamping plate 503 continues to move until the clamping plate 503 completes the clamping of the frame. The staff pushes the rotating column 505 to move downward and presses the protrusion into the corresponding positioning groove 507 to limit the position of the gear 1 501, so that the frame is always limited in the subsequent detection process, and when the protrusion is plugged into the positioning groove 507, it is still limited and cooperated with the mounting hole of the gear 1 501.

[0048] like Figure 5 , Figure 6 and Figure 7 As shown, a spring telescopic rod 34 is fixedly provided on the lower end surface of the rectangular block 14, and a rotating disk 340 is hinged at the telescopic end of the spring telescopic rod 34. A raising platform 341 is rotatably provided on the lower end surface of the rotating disk 340, and the raising platform 341 is fixedly connected to the bracket plate 2.

[0049] like Figure 1 , Figure 2 and Figure 3As shown, the lifting group 31 includes a screw rod 310, and two screw rods 310 symmetrically distributed on the left and right are rotated and penetrated on the front and rear sections of the rectangular frame 11. The screw rod 310 penetrates the guide rail 30 and is threadedly connected to the guide rail 30. The upper end surface of the rectangular frame 11 is provided with multiple motors 311 corresponding to the screw rods 310 one by one, and the screw rod 310 is fixedly connected to the output shaft of the motor 311.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, the driving group 32 includes a rotating shaft 320, and the front and rear end surfaces of the rectangular frame 11 are rotatably provided with two rotating shafts 320 that are symmetrically distributed on the left and right. A winding wheel 321 is fixedly sleeved on the rotating shaft 320, and a rope 322 is wound on the winding wheel 321. One end of the rope 322 is fixedly connected to the winding wheel 321, and the other end of the rope 322 is fixedly connected to the corresponding end surface of the sliding plate 12. Motor 2 323 is provided on the opposite back surfaces of the two front and rear relatively vertical fixed rods 10 through a connecting plate, and the motor 2 323 is connected to the rotating shaft 320.

[0051] During operation, after the clamping mechanism 5 completes clamping the vehicle frame, the motor 1 311 works to drive the screw rod 310 to rotate, and the guide rail 30 moves downward through the threaded connection between the screw rod 310 and the guide rail 30, and the guide rail 30 drives the connecting rod 301 to move downward through the moving block 300, and the connecting rod 301 drives the fixed end of the spring telescopic rod 2 34 to move downward through the rectangular block 14, and the spring telescopic rod 2 34 is compressed and deformed. The elastic force generated by the deformation of the spring telescopic rod 2 34 acts on the vehicle frame through the bracket plate 2, so that the vehicle frame is always close to the ground, and then the right motor 2 323 works to drive the rotating shaft 32 0 rotates, the rotating shaft 320 drives the winding wheel 321 to rotate to reel in the rope 322, thereby pulling the sliding plate 12 to move rightward. At this time, the winding wheel 321 on the left rotates synchronously to unwind the rope 322, the sliding plate 12 drives the rectangular block 14 to move synchronously through the sliding rod 13, the rectangular block 14 drives the raising platform 341 to move synchronously through the spring telescopic rod 2 34, the raising platform 341 drives the bracket plate 2 to move synchronously, the bracket plate 2 drives the frame to move rightward synchronously through the clamping mechanism 5, and the shape of the guide rail 30 is the same as that of the test ground 1, so that the frame is always close to the ground during the rightward movement.

[0052] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, the rotating group 33 includes a vertical bar 330, and two vertical bars 330 symmetrically distributed on the opposite surfaces of the two guide rails 30 are fixedly provided, and a vertical groove is opened through the vertical bar 330, and an electric slider 331 is slidably arranged in the vertical groove, and a lifting plate 332 is fixedly arranged between the front and rear opposite electric sliders 331, and a gear three 333 mounted on the corresponding rotating disk 340 is fixedly arranged on the upper end surface of the raising platform 341, and a plurality of rack fours 334 respectively meshing with the corresponding gear threes 333 are fixedly arranged on the opposite surfaces of the two lifting plates 332.

[0053] like Figure 5 , Figure 6 and Figure 7 As shown, a positioning group 35 is provided on the raising platform 341, and the positioning group 35 includes a fixed block 350. Two circumferentially symmetrically distributed fixed blocks 350 are fixedly provided on the rotating disk 340. An inverted L-shaped plate 351 is vertically slidably penetrated on one side of the raising platform 341 close to the gear 501, and a blocking plate 352 is fixedly provided on the rear end face of the transverse section of the inverted L-shaped plate 351. A vertical rod 353 is slidably provided on the front end face of the inverted L-shaped plate 351 through the transverse plate, and a positioning block 354 is fixedly provided on the lower end face of the vertical rod 353. A spring 355 sleeved on the vertical rod 353 is fixedly provided between the positioning block 354 and the transverse plate.

[0054] like Figure 5 , Figure 6 and Figure 7 As shown, the raising platform 341 is provided with a sliding groove located in front of the inverted L-shaped plate 351 , in which a second electric slider 360 is slidably arranged, and a hinge bar 361 is hinged between the second electric slider 360 and the corresponding inverted L-shaped plate 351 .

[0055] In the initial state, the electric slider 1 331 contacts the lower inner wall of the corresponding vertical groove, and the fixed block 350 is located between the blocking plate 352 and the positioning block 354. After the frame moves to the right to the right horizontal section of the test ground 1, the electric slider 2 360 works to move in the direction close to the inverted L-shaped plate 351, and the electric slider 2 360 pushes the inverted L-shaped plate 351 to move upward through the hinge bar 361, and the inverted L-shaped plate 351 drives the blocking plate 352 and the positioning block 354 to move upward synchronously to avoid the fixed block 350. Then the bracket plate 2 continues to move to the right until the gear three 333 moves to mesh with the rack four 334, and the rack four 334 rotates the raising platform 341 through the gear three 333. After the raising platform 341 drives the inverted L-shaped plate 351 and the corresponding fixed block 350 to stagger each other, the electric slider 2 360 moves and resets, and the raising platform 341 drives the clamping mechanism 5 to rotate synchronously through the bracket plate 2, and the clamping mechanism 5 drives the frame to rotate synchronously.

[0056] During the rotation of the raising platform 341, the inverted L-shaped plate 351 is driven to rotate synchronously, and the inverted L-shaped plate 351 drives the positioning block 354 and the blocking plate 352 to rotate synchronously, until the positioning block 354 rotates until its inclined surface contacts another fixed block 350, the fixed block 350 pushes the positioning block 354 to move upward, the spring 1 355 is compressed and deformed, and the inverted L-shaped plate 351 continues to rotate until the positioning block 354 rotates to disengage from the fixed block 350, at which time the blocking plate 352 is close to the fixed block 350, and the elastic force generated by the deformation of the spring 1 355 pushes the positioning block 354 to move upward. Block 354 moves downward to reset. At this time, the positioning block 354 and the blocking plate 352 are respectively located on both sides of the fixed block 350. The position of the fixed block 350 is limited by the cooperation between the positioning block 354 and the blocking plate 352. At this time, the frame completes the rotation and U-turn. Then the electric slider 1 331 drives the rack 4 334 to move upward through the lifting plate 332. The left motor 2 323 drives the corresponding winding wheel 321 to rotate to wind the rope 322, so that the frame moves to the left, and then repeats the above unlocking, U-turn and movement test steps.

[0057] During the specific work, the staff fixes the placement box 40 on the frame, and places the counterweight block 42 in the placement groove to simulate the load conditions of electric bicycles with different weights. Then, the frame is clamped by the clamping group 1 50, and the position of the handlebar is limited by the clamping group 2 51. Then, the lifting group 31 presses the frame down so that the frame is always close to the ground. Then, the driving group 32 drives multiple frames to move back and forth on the test ground 1 at the same time. The pits and protrusions set on the test ground 1 simulate different types of ground. In the process of the electric bicycle passing through the arc section of the test ground 1, the uphill and downhill of the electric bicycle are simulated. After the bicycle frame moves to the horizontal section of the test ground 1, the rotation group 33 works to make the frame turn around during the movement. The rotation angle of the frame is limited during the frame turning process. After the frame turns around, the above-mentioned movement and turning steps are repeated multiple times until a single test of the durability of the frame is completed. The frame is removed to observe its deformation before and after the test, and then the three frames are exchanged at the same time, so that multiple frames perform a group of tests on the test ground 1 with different road conditions, and then the exchange position test is repeated and the deformation of the frame is observed. Multiple groups of tests are performed and after all vehicles have completed the tests on different road conditions, a comparison observation is made on the frame before and after the test.

[0058] In addition, the present invention also provides a durability testing method for an electric bicycle frame:

[0059] S1. Installing the counterweight: The staff installs the counterweight box on the frame through the fixing group 43, and places the counterweight block 42 in the placement box 40 to simulate different load conditions of the electric bicycle.

[0060] S1. Position limiting clamping: the clamping group 1 50 works to position limit clamping of the frame part, while the clamping group 2 51 works to position limit the two handlebars to simulate the rider holding the handlebars.

[0061] S1. Pressing the frame: the lifting group 31 works to press the frame downwards through the spring telescopic rod 2 34, so that the frame is always close to the ground during the test.

[0062] S1. Moving and turning: the driving group 32 drives multiple frames to move back and forth on the test ground 1 to compare the durability of the test frames under different road conditions, and when moving sideways to the horizontal section of the test ground 1, the rotation group 33 drives the frames to rotate and turn, and then repeats the above movement and turning steps until a set of tests is completed, and the frames are tested multiple times.

[0063] S1. Exchange test: After completing multiple driving tests on the same road condition, the staff will remove the frame to observe the deformation of the frame before and after the test, and then exchange the frame to a position with different road conditions for re-testing, until all frames have completed the test on different road conditions, and then compare the deformation of the frame before and after the test. The durability of the frame is judged by observing the deformation of the frame before and after the test. When the frame is deformed, the more tests are performed, the more durable the frame is. In addition, the smaller the deformation of the frame when the same number of tests are performed, the more durable the frame is.

[0064] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0065] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric bicycle durability detection device, characterized in that: include: A test ground (1), the test ground (1) is divided into a horizontal section, an arc section with an axis on top and a horizontal section from left to right, the test ground (1) is provided with a plurality of different types of ground from front to back, the upper end surfaces of the two horizontal sections of the test ground (1) are fixedly provided with two vertical fixed rods (10) symmetrically distributed front and back, a rectangular frame (11) is fixedly provided between the four vertical fixed rods (10), a sliding plate (12) is slidably provided on the front and rear sections of the rectangular frame (11), a plurality of sliding rods (13) extending from top to bottom with axes slidingly penetrate the sliding plate (12), and a rectangular block (14) is fixedly provided on the lower end surface of the sliding rod (13). A support plate (2) is arranged directly below the rectangular block (14), a clamping mechanism (5) for limiting the position of the frame is arranged on the support plate (2), and an adjustment mechanism (3) is arranged on the support plate (2). The adjustment mechanism (3) comprises a guide rail (30), a guide rail (30) having the same shape as the test ground (1) is slidably arranged between two vertical fixed rods (10) opposite to each other on the left and right, a moving block (300) is slidably arranged on the guide rail (30), a connecting rod (301) is rotatably passed through the two moving blocks (300) opposite to each other on the front and back, and the connecting rod (301) rotatably passes through the rectangular block (14), a lifting group (31) is jointly arranged between the guide rail (30) and the rectangular frame (11), a driving group (32) for driving the sliding plate (12) to move left and right is arranged on the rectangular frame (11), a rotating group (33) for driving the frame to rotate is arranged on the bracket plate (2), and a counterweight unit (4) is arranged below the bracket plate (2).

2. The electric bicycle durability detection device according to claim 1, characterized in that: The counterweight unit (4) comprises a placement box (40), the placement box (40) is arranged below the support plate (2), a plurality of placement slots are arranged in the placement box (40), counterweight blocks (42) are placed in the placement slots, a fixing group (43) for connecting the placement box (40) to the vehicle frame is arranged on the placement box (40), the fixing group (43) comprises a fixing rod (430), two fixing rods (430) symmetrically distributed front and back are fixedly arranged on the right end surface of the placement box (40), a section of the fixing rod (430) away from the placement box (40) is hinged with two clamping claws (431), and the placement box (40) away from the fixing rod (43 0) is hingedly connected to an end surface of one side with a spring telescopic rod 1 (432), the telescopic end of the spring telescopic rod 1 (432) is hingedly connected to two clamping claws 2 (433), the hinged section of the spring telescopic rod 1 (432) and the fixed rod (430) are both provided with a threaded groove, the spring telescopic rod 1 (432) and the fixed rod (430) are both provided with a rotating cylinder (435) threadedly connected to the threaded groove, the lower end surface of the placement box (40) is provided with four matrix-distributed clamping groups, each clamping group includes two spring pieces (436) symmetrically distributed front and back, and the two spring pieces (436) in the same clamping group are divided into arc sections and inclined sections away from each other from top to bottom.

3. The electric bicycle durability detection device according to claim 1, characterized in that: The clamping mechanism (5) comprises a clamping group (50), wherein the clamping group (50) comprises a fixed cylinder (500), the bracket plate (2) is fixedly penetrated by the fixed cylinder (500), the upper end of the fixed cylinder (500) is rotatably provided with a gear (501), the bracket plate (2) is slidably penetrated by two connecting strips (501) which are centrally symmetrical with respect to the fixed cylinder (500), the lower end surface of the connecting strip (503) is fixedly provided with an arc-shaped clamping plate (503), the connecting strip (504) which meshes with the gear (501) is fixedly provided with a rack (504) which meshes with the gear (501), the gear (501) is slidably penetrated by a rotating column (505), the rotating column (505) is provided with a strip-shaped protrusion, the fixed cylinder (500) is provided with a plurality of positioning grooves (507) which cooperate with the protrusion, and the upper end surface of the rotating column (505) is fixedly provided with a handle.

4. The electric bicycle durability detection device according to claim 3, characterized in that: The support plate (2) is provided with a clamping group 2 (51), the clamping group 2 (51) comprising a gear 2 (510), the upper end surface of the support plate (2) is provided with a gear 2 (510) located on the right side of the gear 1 (501) through the rotation of the transmission shaft, two connecting bars 2 are slidably penetrated on the support plate (2) and are centrally symmetrical with respect to the transmission shaft, a limiting cylinder (522) is fixedly provided on the lower end surface of the connecting bar 2, the limiting cylinder (522) is divided into a truncated cone section and a cylindrical section in sequence from a side close to the gear 2 (510) to a direction away from the gear 2 (510), and the large diameter end of the truncated cone section of the limiting cylinder (522) is located on a side close to the gear 2 (510), and racks 2 (523) meshing with the gear 2 (510) are fixedly provided on the two connecting bars 2 respectively, and racks 3 (524) meshing with the gear 1 (501) are fixedly provided on the connecting bar 2 through a transverse bar.

5. The electric bicycle durability detection device according to claim 1, characterized in that: A second spring telescopic rod (34) is fixedly arranged on the lower end surface of the rectangular block (14); a rotating disk (340) is hingedly connected to the telescopic end of the second spring telescopic rod (34); a raising platform (341) is rotatably arranged on the lower end surface of the rotating disk (340); and the raising platform (341) is fixedly connected to the bracket plate (2).

6. The electric bicycle durability detection device according to claim 1, characterized in that: The lifting group (31) comprises a screw rod (310). Two screw rods (310) symmetrically distributed on the left and right sides are rotatably penetrated on the front and rear sections of the rectangular frame (11). The screw rods (310) penetrate the guide rail (30) and are threadedly connected to the guide rail (30). The upper end surface of the rectangular frame (11) is provided with a plurality of motors (311) corresponding to the screw rods (310) one by one. The screw rods (310) are fixedly connected to the output shafts of the motors (311).

7. The electric bicycle durability detection device according to claim 1, characterized in that: The driving group (32) comprises a rotating shaft (320), and two rotating shafts (320) symmetrically distributed on the front and rear end surfaces of the rectangular frame (11) are rotatably provided. A winding wheel (321) is fixedly sleeved on the rotating shaft (320), and a rope (322) is wound on the winding wheel (321). One end of the rope (322) is fixedly connected to the winding wheel (321), and the other end of the rope (322) is fixedly connected to the corresponding end surface of the sliding plate (12). Motor 2 (323) is provided on the opposite back surfaces of the two front and rear relatively vertical fixed rods (10) through a connecting plate, and the motor 2 (323) is connected to the rotating shaft (320).

8. The electric bicycle durability detection device according to claim 5, characterized in that: The rotating group (33) comprises a vertical bar (330), two vertical bars (330) symmetrically distributed on the opposite surfaces of the two tracks are fixedly arranged, a vertical groove is penetrated through the vertical bar (330), an electric slider (331) is slidably arranged in the vertical groove, a lifting plate (332) is fixedly arranged between the front and rear opposite electric sliders (331), a gear (333) sleeved on the corresponding rotating disk (340) is fixedly arranged on the upper end surface of the raising platform (341), and a plurality of racks (334) respectively meshing with the corresponding gears (333) are fixedly arranged on the opposite surfaces of the two lifting plates (332).

9. The electric bicycle durability detection device according to claim 5, characterized in that: The raising platform (341) is provided with a positioning group (35), and the positioning group (35) includes a fixed block (350). Two fixed blocks (350) symmetrically distributed in the circumferential direction are fixedly provided on the rotating disk (340). An inverted L-shaped plate (351) close to the side of the gear 1 (501) is slidably penetrated on the raising platform (341), a blocking plate (352) is fixedly provided on the rear end face of the transverse section of the inverted L-shaped plate (351), a vertical rod (353) is slidably provided on the front end face of the inverted L-shaped plate (351) through the transverse plate, a positioning block (354) is fixedly provided on the lower end face of the vertical rod (353), and a spring 1 (355) sleeved on the vertical rod (353) is fixedly provided between the positioning block (354) and the transverse plate.

10. The electric bicycle durability detection device according to claim 9, characterized in that: The raising platform (341) is provided with a sliding groove located in front of the inverted L-shaped plate (351), in which a second electric slider (360) is slidably arranged, and a hinge bar (361) is hingedly connected between the second electric slider (360) and the corresponding inverted L-shaped plate (351).

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