Electric bicycle frame strength detection device and method

Abstract

The invention relates to the technical field of electric bicycle detection, and specifically to an electric bicycle frame strength detection device and method, comprising a base, wherein two vibration units arranged symmetrically in front and back are installed on the upper end of the base, a test unit for clamping the frame and cooperating with the vibration unit to vibrate the frame up and down is also installed on the upper end of the base, and two adjustment units arranged symmetrically in left and right are installed at positions corresponding to the vibration units on the base; the invention performs a vibration test on the frame strength by cooperating with two hinged vibration plates and the test unit, and the amplitude of the frame vibrating up and down driven by the vibration plate and the test unit can be adjusted according to the angle between the two hinged vibration plates, thereby being able to test the frame strength of an electric vehicle when it is running on roads with different road conditions, thereby increasing the test efficiency of the frame of the invention, and at the same time, the invention can also test the frame strength of an electric vehicle when it is running on a continuously changing road surface, thereby increasing the test accuracy of the frame strength.

Description

Technical Field

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

[0002] The electric bicycle frame is the core structural component of the electric bicycle, which is mainly used to support the entire electric bicycle. The frame is usually welded from metal materials, and there are mounting holes at the front and rear ends for mounting the electric bicycle wheels. In order to ensure the safety and durability of the electric bicycle, it is usually necessary to conduct strength testing on the frame.

[0003] When testing the strength of a bicycle frame, a vibration table is usually used to clamp and fix the mounting holes at the front and rear ends of the frame, and the front and rear ends of the frame are continuously vibrated by the vibration table for a period of time to simulate the vibration conditions encountered by an electric bicycle in actual riding. Finally, the frame is manually inspected for defects such as deformation, cracks or breakage to detect whether the frame strength is qualified.

[0004] The following problems exist in the existing frame strength detection: 1. During the existing frame vibration detection, when the vibration amplitude of the frame needs to be changed, the vibration table usually needs to be shut down and re-adjusted, which results in low frame strength detection efficiency; 2. When an electric bicycle is actually used, the road conditions may continue to change, causing the vibration amplitude of the frame to continue to change. When the frame is vibrated, the frame can only be continuously vibrated up and down with the same vibration amplitude, which makes it impossible to simulate the vibration of the frame in actual use, resulting in reduced accuracy in frame strength detection. Summary of the invention

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: an electric bicycle frame strength detection device, including a base, two vibration units arranged symmetrically in front and back are installed on the upper end of the base, a test unit for clamping the frame and cooperating with the vibration unit to vibrate the frame up and down is also installed on the upper end of the base, and two adjustment units arranged symmetrically in left and right are installed at the positions corresponding to the vibration units on the base; two guide grooves arranged symmetrically in front and back are provided on the upper end of the base, and through grooves connected to the guide grooves are provided on the upper end of the base and on the left and right sides of the guide grooves; the vibration unit includes a reciprocating plate slidably installed in the guide groove left and right, and a cable for driving the reciprocating plate to reciprocate is connected between the reciprocating plate and the base. A reciprocating mechanism is provided for movement, and a plurality of groups of synchronous plates evenly arranged on the upper end of the reciprocating plate are installed for sliding left and right movement, and each group of synchronous plates includes two synchronous plates symmetrically arranged on the left and right, and the upper ends of the two synchronous plates in each group are hinged with a vibration plate, and the two vibration plates are hinged on opposite sides, and a locking mechanism for locking the position of the synchronous plate is installed on the reciprocating plate; the adjusting unit includes a slide plate installed in a through groove for sliding left and right movement, an electric push rod is connected between the slide plate and the through groove, an adjusting block is fixedly installed on one side of the slide plate close to the middle of the base, and an inclined surface is provided on the lower side of the end of the adjusting block away from the slide plate, and a synchronous mechanism for cooperating with the inclined surface of the adjusting block to adjust the angle between the two hinged vibration plates is installed on the lower ends of the plurality of synchronous plates.

[0006] Preferably, the synchronization plate is slidably installed left and right in a synchronization groove preset at the upper end of the reciprocating plate, and the locking mechanism includes a square plate slidably installed front and rear inner walls of the synchronization groove, a top extension spring is connected between the square plate and the reciprocating plate, and multiple locking spring rods evenly arranged left and right are slidably installed on opposite sides of the two square plates, and locking holes are provided in the middle of the front and rear ends of the synchronization plate for cooperating with the locking spring rods to lock the position of the synchronization plate.

[0007] Preferably, transmission rods are fixedly installed on the opposite sides of the two square plates arranged front and back, and an unlocking rod is commonly fixedly installed on the end of the multiple transmission rods arranged left and right away from the square plates. The left and right ends of the unlocking rod slide forward and backward and penetrate the reciprocating plate. The positions of the unlocking rods on the front and rear inner walls of the through grooves corresponding to the positions of the unlocking rods are both installed with L-shaped separation rods that slide up and down through connecting springs. The opposite sides of the transverse sections of the two separation rods near one end of the middle part of the base are set to inclined surfaces, and the inclined surfaces of the separation rods are used to drive the two unlocking rods to move away from each other.

[0008] Preferably, downward pressing rods are fixedly installed at positions corresponding to the separation rods at the left and right ends of the reciprocating plate, and the lower side of the downward pressing rod away from the reciprocating plate is set as an inclined surface, and the inclined surface of the downward pressing rod is used to drive the separation rod to move downward.

[0009] Preferably, the synchronization mechanism includes a matching plate that is slidably installed on the reciprocating plate, and the left and right ends of the matching plate slide up and down and penetrate the left and right ends of the reciprocating plate. The upper sides of the left and right ends of the matching plate are provided with inclined surfaces for cooperating with the inclined surfaces of the adjustment block to drive the matching plate to move downward. A yielding spring rod is slidably installed on the upper end of the matching plate and between the two synchronization plates in each group. A top extension block with a trapezoidal structure at the lower end is fixedly installed at the lower end of the yielding spring rod, and the top extension block and the matching plate are slidably connected up and down.

[0010] Preferably, a transmission plate is fixedly mounted on the upper end of the yield spring rod, and inclined plates are hinged on both ends of the transmission plate. A transmission block is hinged on the end of the inclined plate away from the transmission plate, and the upper end of the transmission block slides left and right to penetrate the reciprocating plate and is fixedly connected to its corresponding synchronous plate.

[0011] Preferably, the positions of the corresponding extension blocks in the matching plates are all equipped with lifting plates that slide left and right through reset springs. A trapezoidal groove is provided on the upper end of the lifting plate, and the inclination of the inclined surface of the trapezoidal groove increases from left to right. The trapezoidal groove of the lifting plate is used to cooperate with the trapezoidal structure of the extension block to drive the extension block to move upward. Square rods are fixedly installed on the lower ends of multiple lifting plates, and the left and right ends of the square rods slide left and right to penetrate the matching plates.

[0012] Preferably, the test unit includes a top plate fixedly mounted on the upper end of the base through a plurality of connecting rods, two mating wheels symmetrically arranged front and back are distributed below the top plate, a vibration rod is fixedly mounted on the upper end of the mating wheel, the upper end of the vibration rod slides up and down through the top plate and is fixedly mounted with a connecting plate, the lower end of the connecting plate is connected to the top plate by two buffer springs symmetrically arranged left and right, and a clamping mechanism for clamping the frame is installed on the upper end of the connecting plate.

[0013] Preferably, the clamping mechanism includes a yield plate installed on the upper end of the connecting plate for forward and backward sliding, a plurality of guide springs are connected between the yield plate and the connecting plate, two left-right symmetrically arranged clamping plates are installed on the upper end of the yield plate for left-right sliding, both clamping plates are jointly installed with a synchronous screw by means of threaded cooperation, and the synchronous screw and the yield plate are rotatably connected, bolts are fixedly installed on the upper ends of the opposite sides of the two clamping plates, and a detachable nut is installed on the bolts by means of threaded cooperation.

[0014] Preferably, a method for testing the strength of an electric bicycle frame is completed in cooperation with an electric bicycle frame strength testing device, and the specific steps are as follows: S1, frame clamping: clamping the frame by a test unit, and installing a counterweight on the frame.

[0015] S2. Frame vibration detection: Control the reciprocating mechanism to drive two hinged vibration plates and the test unit through the reciprocating plate to vibrate the frame up and down.

[0016] S3. Vibration amplitude adjustment: control the electric push rod to drive the adjustment block to move a distance toward the middle of the base. When the reciprocating plate moves to the left and right inner walls of the guide groove, the adjustment block and the synchronization mechanism cooperate to adjust the angle between the two hinged vibration plates, so as to adjust the vibration amplitude of the vibration plate and the test unit in coordination with the upper and lower vibration frames.

[0017] S4. Frame removal: Remove the frame after vibration testing from the test unit and manually inspect whether there are any deformation, cracks or breakage defects on the frame.

[0018] The beneficial effects of the present invention are: 1. The present invention cooperates with the up and down vibration frame by setting two hinged vibration plates and a test unit, and at the same time, the present invention adjusts the angle between the two hinged vibration plates by setting an adjustment block and a synchronization mechanism. The greater the movement distance of the adjustment block toward the middle of the base, the smaller the angle between the two hinged vibration plates is made by the adjustment block and the synchronization mechanism, and the greater the amplitude of the up and down vibration of the frame driven by the vibration plate and the test unit, thereby being able to test the frame strength of the electric vehicle when it is traveling on roads with different road conditions, thereby increasing the test efficiency of the frame strength.

[0019] 2. The present invention performs secondary adjustment on the angle between the two hinged vibration plates by setting the trapezoidal groove of the lifting plate and the trapezoidal structure of the top extension block, and the inclination degree of the inclined surface of the trapezoidal groove of the lifting plate increases from left to right. When the lifting plate moves a certain distance to the left or right, the angle between the two hinged vibration plates increases from left to right, thereby realizing the vibration test of the frame strength of the electric vehicle when it is driving on a continuously changing road surface, thereby increasing the accuracy of the frame strength test results.

[0020] 3. The present invention locks the position of the synchronization plate by setting a locking mechanism, so that the two hinged vibration plates, the synchronization plate and the reciprocating plate form a stable triangular structure, which increases the stability of the vibration plate and the matching wheel to ultimately drive the frame to vibrate continuously up and down, thereby increasing the stability of the frame strength vibration detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the test unit of the present invention.

[0024] Figure 3 It is a three-dimensional structural schematic diagram of a partial structure of a test unit of the present invention.

[0025] Figure 4It is a schematic diagram of the three-dimensional structure of the vibration unit after a portion of the base is cut away according to the present invention.

[0026] Figure 5 The present invention Figure 4 Enlarged view of point A.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the vibration unit after the upper end of the reciprocating plate is cut away.

[0028] Figure 7 The present invention Figure 6 Enlarged view of point B.

[0029] Figure 8 It is a cross-sectional view of a partial structure of the locking mechanism of the present invention and its corresponding synchronous plate.

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the vibration unit after the front end of the reciprocating plate is cut away.

[0031] Fig.10 It is a front view of the synchronization mechanism after a part of the matching plate is cut away.

[0032] Figure numerals: 1, base; 11, guide groove; 12, through groove; 121, connecting spring; 122, separation rod; 2, vibration unit; 21, reciprocating plate; 211, pressing rod; 22, reciprocating mechanism; 23, synchronous plate; 231, locking hole; 24, vibration plate; 25, locking mechanism; 251, square plate; 252, extension spring; 253, locking spring rod; 254, transmission rod; 255, unlocking rod; 26, synchronization mechanism; 261, matching plate; 262, giving way spring rod; 263, extension Block; 264, transmission plate; 265, inclined plate; 266, transmission block; 267, reset spring; 268, lifting plate; 269, square rod; 27, synchronization groove; 3, test unit; 31, top plate; 32, matching wheel; 33, vibration rod; 34, connecting plate; 35, clamping mechanism; 351, give way plate; 352, guide spring; 353, clamping plate; 354, synchronization screw; 355, bolt; 36, buffer spring; 4, adjustment unit; 41, slide plate; 42, electric push rod; 43, adjustment block. DETAILED DESCRIPTION

[0033] The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product instructions shall be followed.

[0034] See also Figure 1A device for detecting the strength of an electric bicycle frame comprises a base 1, two vibration units 2 arranged symmetrically in front and back are installed on the upper end of the base 1, a test unit 3 for clamping the frame and cooperating with the vibration unit 2 to vibrate the frame up and down is also installed on the upper end of the base 1, and two adjustment units 4 arranged symmetrically in left and right are installed at positions on the base 1 corresponding to the vibration units 2.

[0035] The present invention is used to perform a vibration test on the frame strength, and the present invention can test the frame strength of an electric vehicle when it is traveling on roads with different road conditions, thereby increasing the test efficiency of the frame of the present invention. At the same time, the present invention can also test the frame strength of an electric vehicle when it is traveling on a continuously changing road surface, thereby increasing the test accuracy of the frame strength.

[0036] Specifically, firstly, the frame is placed on the test unit 3, and the test unit 3 is controlled to clamp and fix the frame, and at the same time, a counterweight block of a certain weight is installed on the frame, and then the vibration unit 2 is started, so that the vibration unit 2 and the test unit 3 cooperate to continuously drive the frame to vibrate up and down, and then the vibration unit 2 is adjusted by controlling the adjustment unit 4, and then the vibration amplitude of the frame by the vibration unit 2 and the test unit 3 is adjusted, and the frame is continuously vibrated for a period of time, so as to realize the vibration test of the frame strength of the electric vehicle when it is traveling on roads with different road conditions, and the adjustment unit 4 is controlled to adjust the vibration unit 2 again, so that the vibration unit 2 and the test unit 3 continue to vibrate the frame with different vibration amplitudes, and continuously vibrate the frame for a period of time, so as to realize the vibration test of the frame strength of the electric vehicle when it is traveling on a continuously changing road surface, and finally, the frame after the test is removed from the test unit 3, and the frame is manually inspected for defects such as deformation, cracks or fractures, so as to test whether the strength of the frame is qualified.

[0037] See also Figure 1 and Figure 2 The test unit 3 includes a top plate 31 fixedly mounted on the upper end of the base 1 through a plurality of connecting rods, two matching wheels 32 symmetrically arranged front and back are distributed below the top plate 31, a vibration rod 33 is fixedly mounted on the upper end of the matching wheel 32, the upper end of the vibration rod 33 slides up and down through the top plate 31 and is fixedly mounted with a connecting plate 34, the lower end of the connecting plate 34 is connected to the top plate 31 through two buffer springs symmetrically arranged left and right, and a clamping mechanism 35 for clamping the frame is installed on the upper end of the connecting plate 34.

[0038] The test unit 3 is used to clamp and fix the frame and cooperate with the vibration unit 2 to continuously vibrate the frame; specifically, first, the mounting ends of the front and rear wheels of the frame are respectively placed in the two clamping mechanisms 35, and the two clamping mechanisms 35 are controlled to clamp and fix the frame. After the counterweight is installed on the frame, the frame and the counterweight drive the connecting plate 34 to move downward through the clamping mechanism 35 under the action of gravity and compress the buffer spring 36, so that the buffer spring 36 can elastically support the corresponding connecting plate 34. When the vibration unit 2 is started, the vibration unit 2 can cooperate with the matching wheel 32 to drive the connecting plate 34 to move up and down quickly through the vibration rod 33, and then the connecting plate 34 drives the frame to vibrate up and down through the clamping mechanism 35, thereby realizing the vibration test of the frame.

[0039] See also Figure 2 and Figure 3 The clamping mechanism 35 includes a yield plate 351 slidably mounted on the upper end of the connecting plate 34, and a plurality of guide springs 352 are connected between the yield plate 351 and the connecting plate 34. Two left-right symmetrically arranged clamping plates 353 are slidably mounted on the upper end of the yield plate 351. The two clamping plates 353 are both mounted with a synchronous screw 354 by means of threaded fitting, and the synchronous screw 354 and the yield plate 351 are rotatably connected. Bolts 355 are fixedly mounted on the upper ends of the opposite sides of the two clamping plates 353, and the bolts 355 are mounted with a detachable nut by means of threaded fitting.

[0040] The clamping mechanism 35 is used to clamp and fix the frame; specifically, first remove the nut of the bolt 355, and place the mounting hole of the frame wheel between the two clamping plates 353, then manually screw the synchronous screw 354 to drive the two clamping plates 353 to move synchronously in a direction close to each other, so that the clamping plate 353 drives the two bolts 355 to move synchronously in a direction close to each other and insert them into the mounting holes of the frame wheel. Finally, manually install the nut on the bolt 355 to clamp and fix the frame. When the connecting plate 34 vibrates up and down, the connecting plate 34 finally drives the frame to vibrate up and down through the yield plate 351, and the yield plate 351 can move forward and backward relative to the connecting plate 34 and compress the guide spring 352, so as not to interfere with the up and down vibration of the frame. When the vibration detection of the frame is completed, the nut of the bolt 355 is removed, and the synchronous screw 354 is manually screwed to drive the two clamping plates 353 to move synchronously in a direction away from each other, so that the frame can be taken out.

[0041] See also Figure 1 , Figure 4 and Figure 6The upper end of the base 1 is provided with two guide grooves 11 which are symmetrically arranged front and back, and the upper end of the base 1 and the left and right sides of the guide grooves 11 are provided with through grooves 12 which are connected to the guide grooves 11; the vibration unit 2 includes a reciprocating plate 21 which is slidably installed in the guide grooves 11, and a reciprocating mechanism 22 for driving the reciprocating plate 21 to reciprocate is connected between the reciprocating plate 21 and the base 1, and a plurality of groups of synchronous plates 23 which are evenly arranged left and right are slidably installed on the upper end of the reciprocating plate 21, and each group of synchronous plates 23 includes two synchronous plates 23 which are symmetrically arranged left and right, and the upper ends of the two synchronous plates 23 of each group are hinged with a vibration plate 24, and the opposite sides of the two vibration plates 24 are hinged, and a locking mechanism 25 for locking the position of the synchronization plate 23 is installed on the reciprocating plate 21; wherein, the reciprocating plate 21 and the installation position correspond to the installation position of the matching wheel 32.

[0042] See also Figure 1 and Figure 4 The adjustment unit 4 includes a slide plate 41 which is slidably installed in the through slot 12 left and right, an electric push rod 42 is connected between the slide plate 41 and the through slot 12, an adjustment block 43 is fixedly installed on one side of the slide plate 41 close to the middle of the base 1, and an inclined surface is provided on the lower side of the end of the adjustment block 43 away from the slide plate 41, and a synchronization mechanism 26 for cooperating with the inclined surface of the adjustment block 43 to adjust the angle between the two hinged vibration plates 24 is installed at the lower ends of the multiple synchronization plates 23.

[0043] It should be noted that the reciprocating mechanism 22 in the present invention includes a threaded rod, which is connected to the reciprocating plate 21 by threaded cooperation, and is rotatably connected to the base 1. The right end of the threaded rod is fixedly connected to the output shaft of the reciprocating motor fixedly installed in the base 1. By starting the reciprocating motor to drive the threaded rod to rotate, the threaded rod drives the reciprocating plate 21 to move back and forth left and right in the guide groove 11.

[0044] The vibration unit 2 is used to cooperate with the matching wheel 32 to vibrate the frame, and the adjustment unit 4 is used to adjust the vibration amplitude of the frame in cooperation with the vibration unit 2 and the matching wheel 32; specifically, when the frame is subjected to a vibration test, the reciprocating mechanism 22 is controlled to drive the reciprocating plate 21 to move back and forth in the guide groove 11, and the reciprocating plate 21 does not move to the corresponding position of the left and right inner walls of the guide groove 11, so that the reciprocating plate 21 finally drives the two hinged vibration plates 24 to move back and forth through the synchronization plate 23. When the vibration plate 24 moves to the corresponding position of the matching wheel 32, the vibration plate 21 is driven to move back and forth. When the vibration plate 24 is in motion, the matching wheel 32 can be driven to move up and down, and the vibration plate 24 is provided with a plurality of them, so that the vibration plate 24 can cooperate with the matching wheel 32 to finally drive the frame to vibrate continuously up and down, and the locking mechanism 25 can lock the position of the synchronous plate 23, so that the two hinged vibration plates 24, the synchronous plate 23 and the reciprocating plate 21 form a stable triangular structure, which increases the stability of the vibration plate 24 and the matching wheel 32 when they cooperate to finally drive the frame to vibrate continuously up and down, thereby increasing the stability during the frame strength vibration detection.

[0045] When the vibration amplitude of the frame needs to be adjusted, the reciprocating mechanism 22 is controlled to drive the reciprocating plate 21 to move to the corresponding position of the left inner wall of the guide groove 11 or the corresponding position of the right inner wall of the guide groove 11, and the electric push rod 42 is controlled to drive the adjustment block 43 to move a distance toward the middle of the base 1 through the slide plate 41. When the reciprocating plate 21 moves to the corresponding position of the left inner wall of the guide groove 11 or the corresponding position of the right inner wall of the guide groove 11, the locking mechanism 25 can first release the lock of the synchronous plate 23, and then the adjustment block 43 in the moving direction of the reciprocating plate 21 can cooperate with the synchronous mechanism 26 to adjust the two hinged vibration plates 2 through the synchronous plate 23. 4 can be adjusted, and the angle between the two hinged vibration plates 24 can be adjusted according to the distance that the adjustment block 43 moves toward the middle of the base 1. Finally, the locking mechanism 25 can lock the position of the synchronization plate 23 again, so as to adjust the amplitude of the up and down vibration of the frame driven by the cooperation of the vibration plate 24 and the matching wheel 32. The smaller the angle between the two hinged vibration plates 24, the greater the amplitude of the up and down vibration of the frame driven by the cooperation of the vibration plate 24 and the matching wheel 32. Therefore, the frame strength test of the automatic vehicle when driving on roads with different road conditions can be tested, thereby increasing the test efficiency of the frame strength.

[0046] Moreover, the adjustment block 43 can cooperate with the synchronization mechanism 26 to gradually increase the angle between the multiple hinged vibration plates 24 from left to right, thereby realizing the vibration test of the frame strength of the electric vehicle when it is traveling on a continuously changing road surface, and increasing the accuracy of the frame strength test results. After the amplitude of the up and down vibration of the frame is adjusted, the electric push rod 42 is controlled to drive the adjustment block 43 to return to the initial position through the slide plate 41.

[0047] See also Figure 1 , Figure 6-Figure 8 The synchronous plate 23 is slidably installed in the synchronous groove 27 preset at the upper end of the reciprocating plate 21. The locking mechanism 25 includes a square plate 251 slidably installed on the front and rear inner walls of the synchronous groove 27. A top extension spring 252 is connected between the square plate 251 and the reciprocating plate 21. A plurality of locking spring rods 253 evenly arranged left and right are slidably installed on the opposite sides of the two square plates 251. Locking holes 231 for cooperating with the locking spring rods 253 to lock the position of the synchronous plate 23 are provided in the middle of the front and rear ends of the synchronous plate 23.

[0048] See also Figure 4-Figure 7 , the two front and rear arranged square plates 251 are fixedly installed with transmission rods 254 on the back sides thereof, and the multiple transmission rods 254 arranged on the left and right sides are jointly fixedly installed with an unlocking rod 255 on one end away from the square plate 251, and the positions of the unlocking rod 255 on the front and rear inner walls of the through groove 12 corresponding to the front and rear inner walls thereof are both installed with L-shaped separation rods 122 which slide up and down through the connecting spring 121, and the back sides of the transverse sections of the two separation rods 122 near one end of the middle part of the base 1 are both set with inclined surfaces, and the inclined surfaces of the separation rods 122 are used to drive the two unlocking rods 255 to move away from each other; the positions of the left and right ends of the reciprocating plate 21 corresponding to the separation rods 122 are fixedly installed with pressing rods 211, and the lower side of the end of the pressing rod 211 away from the reciprocating plate 21 is set with an inclined surface, and the inclined surface of the pressing rod 211 is used to drive the separation rod 122 to move downward.

[0049] The locking mechanism 25 is used to lock the position of the synchronous plate 23; specifically, initially, the locking spring rod 253 corresponding to the position of the locking hole 231 can be inserted into the locking hole 231 under its elastic action, so as to realize the position locking of the synchronous plate 23. When the reciprocating plate 21 moves to the corresponding position of the left inner wall of the guide groove 11 or the corresponding position of the right inner wall of the guide groove 11, the two inclined surfaces of the separation rods 122 corresponding to the through groove 12 in the moving direction of the reciprocating plate 21 can drive the two unlocking rods 255 to move away from each other, so that the unlocking rod 255 drives the square plate 251 to move away from the synchronous plate 23 through the transmission rod 254, so that the locking spring rod 253 moves out of the locking hole 231, thereby releasing the position lock of the synchronous plate 23.

[0050] When the adjustment block 43 and the synchronization mechanism 26 cooperate to adjust the angle between the two hinged vibration plates 24 through the synchronization plate 23, the inclined surface of the lower pressure rod 211 moves to a position corresponding to a section where the separation rod 122 and the through groove 12 are installed, and the inclined surface of the lower pressure rod 211 can drive the separation rod 122 to move downward and compress the connecting spring 121, so that the separation rod 122 and the unlocking rod 255 are separated, and then the square plate 251 is restored to its initial position in the direction close to the synchronization plate 23 under the action of the extension spring 252, so that the locking spring rod 253 corresponding to the position of the locking hole 231 is inserted into the locking hole 231, thereby locking the position of the synchronization plate 23, and at the same time, the square plate 251 drives the unlocking rod 255 to return to its initial position through the transmission rod 254.

[0051] See also Figure 4 , Fig. 9 and Fig.10 The synchronization mechanism 26 includes a matching plate 261 that is slidably installed on the reciprocating plate 21, and the left and right ends of the matching plate 261 slide up and down and penetrate the left and right ends of the reciprocating plate 21. The upper sides of the left and right ends of the matching plate 261 are provided with inclined surfaces for cooperating with the inclined surfaces of the adjustment block 43 to drive the matching plate 261 to move downward. A yielding spring rod 262 is slidably installed on the upper end of the matching plate 261 and between the two synchronization plates 23 of each group. A top extension block 263 with a trapezoidal structure at the lower end is fixedly installed at the lower end of the yielding spring rod 262, and the top extension block 263 and the matching plate 261 are slidably connected up and down.

[0052] See also Fig. 9 and Fig.10 , a transmission plate 264 is fixedly installed on the upper end of the yield spring rod 262, and an inclined plate 265 is hinged on the left and right ends of the transmission plate 264. A transmission block 266 is hinged on one end of the inclined plate 265 away from the transmission plate 264. The upper end of the transmission block 266 slides left and right through the reciprocating plate 21 and is fixedly connected to its corresponding synchronous plate 23; a lifting plate 268 is installed on the position corresponding to the top extension block 263 in the matching plate 261 through a reset spring 267 to slide left and right, and a trapezoidal groove is provided on the upper end of the lifting plate 268, and the inclination degree of the inclined surface of the trapezoidal groove increases from left to right. The trapezoidal groove of the lifting plate 268 is used to cooperate with the trapezoidal structure of the top extension block 263 to drive the top extension block 263 to move upward, and a square rod 269 is fixedly installed on the lower end of multiple lifting plates 268, and the left and right ends of the square rod 269 slide left and right through the matching plate 261.

[0053] The synchronization mechanism 26 is used to cooperate with the adjustment block 43 to adjust the angle between the two hinged vibration plates 24; specifically, when the reciprocating plate 21 moves to the corresponding position of the left inner wall of the guide groove 11 or the corresponding position of the right inner wall of the guide groove 11, the slide plate 41 is driven to move a distance toward the middle of the base 1 by controlling the electric push rod 42. When the locking spring rod 253 releases the position lock of the synchronization plate 23, the inclined surface of the matching plate 261 can cooperate with the inclined surface of the adjustment block 43 to drive the matching plate 261 to move downward, so that the matching plate 261 passes The transmission plate 264 is driven downward by the yielding spring rod 262, so that the transmission plate 264 drives the corresponding two synchronous plates 23 to move toward each other through the inclined plate 265, thereby reducing the angle between the two hinged vibration plates 24 corresponding to the two synchronous plates 23, and the greater the distance that the electric push rod 42 drives the slide plate 41 to move closer to the middle of the base 1, the greater the distance that the inclined surface of the matching plate 261 can cooperate with the inclined surface of the adjustment block 43 to drive the matching plate 261 to move downward, thereby reducing the angle between the two hinged vibration plates 24.

[0054] When it is necessary to conduct a vibration test on the frame strength of the electric vehicle when it is traveling on a continuously changing road surface, the electric push rod 42 is controlled to drive the slide plate 41 to move a distance in the direction close to the middle of the base 1, so that the inclined surface of the matching plate 261 can cooperate with the inclined surface of the adjustment block 43 to drive the upper end of the matching plate 261 to move to the corresponding position of the lower end of the adjustment block 43, so that the slide plate 41 can block the end of the square rod 269 and the reciprocating plate 21 that move in the same direction, so that the square rod 269 moves relative to the matching plate 261 in the direction opposite to the moving direction of the reciprocating plate 21 under the blocking effect of the slide plate 41, and then the square rod 269 drives the lifting plate 268 to move, so that the lifting plate 268 can be lifted. The trapezoidal groove of plate 268 can cooperate with the trapezoidal structure of the top extension block 263 to drive the yield spring rod 262 to move upward, so that the yield spring rod 262 can finally drive the corresponding two hinged vibration plates 24 to increase the angle through the transmission plate 264, and the inclination degree of the inclined surface of the trapezoidal groove of the lifting plate 268 increases from left to right, so that the distance the yield spring rod 262 moves upward increases from left to right, and the angle between the two hinged vibration plates 24 increases from left to right, so that the vibration test of the frame strength of the electric vehicle when it is driving on a continuously changing road surface can be realized, thereby increasing the accuracy of the frame strength test results.

[0055] In addition, the present invention also provides a frame strength testing method, which is completed in cooperation with an electric bicycle frame strength detection device, and the specific steps are as follows: S1: frame clamping: first, the nut of the bolt 355 is removed, and the mounting hole of the frame wheel is placed between the two clamping plates 353, and then the two bolts 355 are driven to move synchronously in a direction close to each other through the clamping plate 353 by manually screwing the synchronous screw 354 and inserting them into the mounting holes of the frame for mounting the wheel, and finally the nut is manually installed on the bolt 355 to achieve clamping and fixing of the frame, and finally a counterweight block of a certain weight is manually installed on the frame.

[0056] S2: Frame vibration detection: Control the reciprocating mechanism 22 to drive the reciprocating plate 21 to move back and forth left and right in the guide groove 11, and the reciprocating plate 21 does not move to the corresponding position of the left and right inner walls of the guide groove 11. The reciprocating plate 21 finally drives the two hinged vibration plates 24 to move back and forth left and right through the synchronous plate 23. When the vibration plate 24 moves to the corresponding position of the matching wheel 32, the vibration plate 24 can drive the matching wheel 32 to move up and down, and the vibration plate 24 is provided with multiple, so that the vibration plate 24 can cooperate with the matching wheel 32 to finally drive the frame to vibrate continuously up and down, thereby realizing the vibration test of the frame, and the locking spring rod 253 can lock the hole 231 to cooperate with the synchronous plate 23 to lock the position, so that the two hinged vibration plates 24, the synchronous plate 23 and the reciprocating plate 21 form a stable triangular structure, which increases the stability of the vibration plate 24 and the matching wheel 32 when they finally drive the frame to vibrate continuously up and down, thereby increasing the stability during the frame strength vibration detection.

[0057] S3: Vibration amplitude adjustment: control the electric push rod 42 to drive the slide plate 41 to move a distance toward the middle of the base 1, and control the reciprocating mechanism 22 to drive the reciprocating plate 21 to move to the corresponding position of the left inner wall of the guide groove 11 or the corresponding position of the right inner wall of the guide groove 11. When the reciprocating plate 21 moves to the corresponding position of the left inner wall of the guide groove 11 or the corresponding position of the right inner wall of the guide groove 11, the two separating rods 122 inclined surfaces corresponding to the through groove 12 in the moving direction of the reciprocating plate 21 can drive the two unlocking rods 255 to move away from each other, so that the unlocking rod 255 finally drives the locking spring rod 253 to move out of the locking hole 231 through the transmission rod 254, thereby releasing the position lock of the synchronous plate 23.

[0058] Then the adjusting block 43 on the moving direction of the reciprocating plate 21 can cooperate with the inclined surface of the matching plate 261 to drive the matching plate 261 to move downward, so that the matching plate 261 finally drives the corresponding two synchronous plates 23 to move in a direction close to each other through the yielding spring rod 262, thereby reducing the angle between the two hinged vibration plates 24 corresponding to the two synchronous plates 23, and then the inclined surface of the pressing rod 211 can drive the separation rod 122 to move downward, so that the separation rod 122 and the unlocking rod 255 are separated, and then the square plate 251 drives the locking spring corresponding to the position of the locking hole 231 under the action of the top extension spring 252. The rod 253 is inserted into the locking hole 231 to lock the position of the synchronization plate 23. The greater the distance that the electric push rod 42 drives the slide plate 41 to move toward the middle of the base 1, the greater the distance that the inclined surface of the matching plate 261 can cooperate with the inclined surface of the adjustment block 43 to drive the matching plate 261 to move downward, thereby making the angle between the two hinged vibration plates 24 smaller, and the vibration plate 24 and the matching wheel 32 cooperate to finally drive the frame to vibrate up and down with a greater amplitude, and continue to vibrate the frame up and down for a period of time, thereby being able to test the frame strength of the automatic vehicle when driving on roads with different road conditions, thereby increasing the test efficiency of the frame strength.

[0059] When it is necessary to conduct a vibration test on the frame strength of the electric vehicle when it is traveling on a continuously changing road surface, the electric push rod 42 is controlled to drive the slide plate 41 to move toward the direction close to the middle of the base 1, so that the inclined surface of the matching plate 261 can cooperate with the inclined surface of the adjustment block 43 to drive the upper end of the matching plate 261 to move to the corresponding position of the lower end of the adjustment block 43, so that the square rod 269 moves relative to the matching plate 261 in the direction opposite to the moving direction of the reciprocating plate 21 under the blocking effect of the slide plate 41, and then the square rod 269 drives the lifting plate 268 to move the trapezoidal groove and the trapezoidal structure of the top extension block 263 Cooperate to drive the yield spring rod 262 to move upward, so that the yield spring rod 262 finally drives the corresponding two hinged vibration plates 24 to increase the angle through the transmission plate 264, and the inclination degree of the trapezoidal groove slope of the lifting plate 268 increases from left to right, so that the upward movement distance of the yield spring rod 262 increases from left to right, and the angle between the two hinged vibration plates 24 increases from left to right, thereby realizing the vibration test of the frame strength of the electric vehicle when it is driving on a continuously changing road surface, and increasing the accuracy of the frame strength test results.

[0060] S4: Removing the frame: After the vibration detection of the frame is completed, the nut of the bolt 355 is removed, and the synchronous screw 354 is manually screwed to drive the two bolts 355 to move synchronously away from each other through the clamping plate 353, so that the frame can be taken out and manually inspected for defects such as deformation, cracks or breakage.

[0061] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric bicycle frame strength testing device, comprising a base, two vibration units arranged symmetrically in front and back are installed on the upper end of the base, and a test unit for clamping the frame and cooperating with the vibration unit to vibrate the frame up and down is also installed on the upper end of the base, characterized in that: Two adjustment units arranged symmetrically on both sides are installed at the positions corresponding to the vibration units on the base; The upper end of the base is provided with two guide grooves arranged symmetrically in front and back, and the upper end of the base and the left and right sides of the guide grooves are provided with through grooves connected with the guide grooves; The vibration unit includes a reciprocating plate slidably installed in the guide groove, a reciprocating mechanism for driving the reciprocating plate to reciprocate is connected between the reciprocating plate and the base, a plurality of groups of synchronous plates evenly arranged left and right are slidably installed on the upper end of the reciprocating plate, each group of synchronous plates includes two synchronous plates symmetrically arranged left and right, the upper ends of the two synchronous plates of each group are hinged with a vibration plate, and the opposite sides of the two vibration plates are hinged, and a locking mechanism for locking the position of the synchronization plate is installed on the reciprocating plate; The adjustment unit comprises a slide plate slidably installed in the through slot, an electric push rod is connected between the slide plate and the through slot, an adjustment block is fixedly installed on one side of the slide plate close to the middle of the base, an inclined surface is provided on the lower side of the end of the adjustment block away from the slide plate, and a synchronization mechanism for cooperating with the inclined surface of the adjustment block to adjust the angle between the two hinged vibration plates is installed at the lower ends of the plurality of synchronization plates; The synchronous plate is installed in a synchronous groove preset at the upper end of the reciprocating plate for sliding left and right. The locking mechanism includes a square plate installed in the front and rear inner walls of the synchronous groove for sliding forward and backward. A top extension spring is connected between the square plate and the reciprocating plate. Multiple locking spring rods evenly arranged left and right are installed for sliding forward and backward on opposite sides of the two square plates. Locking holes for cooperating with the locking spring rods to lock the position of the synchronous plate are opened in the middle of the front and rear ends of the synchronous plate. Transmission rods are fixedly installed on the opposite sides of the two front and rear square plates, and unlocking rods are fixedly installed on the ends of the multiple transmission rods arranged on the left and right that are away from the square plates. The left and right ends of the unlocking rods slide forward and backward to penetrate the reciprocating plate, and the positions of the unlocking rods corresponding to the front and rear inner walls of the through grooves are both slidably installed with L-shaped separation rods through connecting springs. The opposite sides of the transverse sections of the two separation rods near one end of the middle of the base are both set as inclined surfaces, and the inclined surfaces of the separation rods are used to drive the two unlocking rods to move in a direction away from each other; The synchronization mechanism includes a matching plate that is installed on the reciprocating plate for sliding up and down, and the left and right ends of the matching plate slide up and down and penetrate the left and right ends of the reciprocating plate. The upper sides of the left and right ends of the matching plate are provided with inclined surfaces for cooperating with the inclined surfaces of the adjustment block to drive the matching plate to move downward. A yielding spring rod is installed on the upper end of the matching plate and between the two synchronization plates in each group for sliding up and down. A top extension block with a trapezoidal structure at the lower end is fixedly installed at the lower end of the yielding spring rod, and the top extension block and the matching plate are connected for sliding up and down.

2. The electric bicycle frame strength detection device according to claim 1, characterized in that: The positions of the separation rods at the left and right ends of the reciprocating plate are fixedly installed with pressing rods, and the lower side of one end of the pressing rod away from the reciprocating plate is set as an inclined surface, and the inclined surface of the pressing rod is used to drive the separation rod to move downward.

3. The electric bicycle frame strength detection device according to claim 1, characterized in that: The upper end of the yield spring rod is fixedly installed with a transmission plate, and the left and right ends of the transmission plate are hinged with inclined plates, and the end of the inclined plate away from the transmission plate is hinged with a transmission block, and the upper end of the transmission block slides left and right to penetrate the reciprocating plate and is fixedly connected to its corresponding synchronous plate.

4. The electric bicycle frame strength detection device according to claim 3, characterized in that: The positions of the corresponding extension blocks in the matching plate are all installed with lifting plates for sliding left and right through reset springs. A trapezoidal groove is provided on the upper end of the lifting plate, and the inclination of the inclined surface of the trapezoidal groove increases from left to right. The trapezoidal groove of the lifting plate is used to cooperate with the trapezoidal structure of the extension block to drive the extension block to move upward. Square rods are fixedly installed at the lower ends of multiple lifting plates, and the left and right ends of the square rods slide left and right to penetrate the matching plates.

5. The electric bicycle frame strength detection device according to claim 1, characterized in that: The test unit includes a top plate fixedly installed on the upper end of the base through a plurality of connecting rods, two matching wheels symmetrically arranged front and back are distributed below the top plate, a vibration rod is fixedly installed on the upper end of the matching wheel, the upper end of the vibration rod slides up and down through the top plate and is fixedly installed with a connecting plate, the lower end of the connecting plate is connected to the top plate by two buffer springs symmetrically arranged left and right, and a clamping mechanism for clamping the frame is installed on the upper end of the connecting plate.

6. The electric bicycle frame strength detection device according to claim 5, characterized in that: The clamping mechanism includes a yield plate installed on the upper end of a connecting plate for forward and backward sliding movement, a plurality of guide springs are connected between the yield plate and the connecting plate, two left-right symmetrically arranged clamping plates are installed on the upper end of the yield plate for left-right sliding movement, both clamping plates are jointly installed with a synchronous screw by means of threaded cooperation, and the synchronous screw and the yield plate are rotatably connected, bolts are fixedly installed on the upper ends of opposite sides of the two clamping plates, and removable nuts are installed on the bolts by means of threaded cooperation.

7. A method for testing the strength of an electric bicycle frame, characterized in that: The electric bicycle frame strength detection device described in any one of claims 1 to 6 is used to complete the process, and the specific steps are as follows: S1. Frame clamping: clamp the frame through the test unit and install the counterweight on the frame; S2, frame vibration detection: control the reciprocating mechanism to drive two hinged vibration plates and the test unit to vibrate the frame up and down through the reciprocating plate; S3, vibration amplitude adjustment: control the electric push rod to drive the adjustment block to move a distance toward the middle of the base. When the reciprocating plate moves to the left and right inner walls of the guide groove, the adjustment block and the synchronization mechanism cooperate to adjust the angle between the two hinged vibration plates, so as to adjust the vibration amplitude of the vibration plate and the test unit in coordination with the upper and lower vibration frames; S4. Frame removal: Remove the frame after vibration testing from the test unit and manually inspect whether there are any deformation, cracks or breakage defects on the frame.

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