Fatigue strength test equipment for new energy automobile

Abstract

The invention discloses fatigue strength test equipment for a new energy automobile, and the equipment comprises a rack, the inner wall of the rack is provided with a sliding rail, the side surface of the rack is rotatably connected with a baffle plate, the inner wall of the rack is rotatably connected with a driving disc, the driving disc is driven by a motor to rotate, the rack is internally provided with a detection pressing plate, and the rack is internally provided with an auxiliary pressing plate. The detection pressing plate is located on the right side of the auxiliary pressing plate, the top face of the auxiliary pressing plate is slidably connected with a pulling frame, the device further comprises an auxiliary testing mechanism and an auxiliary adjusting mechanism, and the auxiliary testing mechanism can compress the spring piece more times in the process that the driving disc rotates by one circle, so that more work tasks can be completed within the same time, and the working efficiency is improved. And the auxiliary adjusting mechanism connects the auxiliary pressing plate with the pulling frame through the T-shaped auxiliary plate, and compared with a comparison file, connection can be achieved through simple rotating operation, special tools do not need to be used, and operation steps are simplified.

Description

Technical Field

[0001] The present invention relates to the technical field related to the testing of mechanical components, and specifically to a fatigue strength testing device for new energy vehicles. Background Art

[0002] With the rapid development of the new energy vehicle industry, the reliability requirements for vehicle components are also getting higher and higher. As an important part of new energy vehicles, the performance of water pumps directly affects the operation efficiency and safety of the whole vehicle. Springs, as key components in multiple vehicle parts, such as water pumps, hood cable return springs, clutch anti-torsion springs, shock absorber springs, etc., their fatigue performance plays a crucial role in the stability and lifespan of the springs. According to the relevant requirements for the recycling and reuse of vehicle components, the above-mentioned spring-like parts can be used through recycling and remanufacturing after the vehicle is scrapped (scrapped after an accident, scrapped for operating vehicles, etc.). After remanufacturing, it is necessary to test the relevant performance of the springs, especially fatigue testing, which is of great significance for improving the reliability of the springs and extending their service life.

[0003] However, traditional spring fatigue testing methods mainly test individual springs, obtaining relatively less data and having relatively low detection efficiency. At the same time, traditional testing methods usually use fixed amplitudes and frequencies, and cannot truly reflect the dynamic loads and alternating stresses borne by the springs in actual use. Therefore, developing a spring fatigue testing method that can simulate actual working conditions has become an urgent problem to be solved.

[0004] In a Chinese patent with the patent publication number CN117990393B, a fatigue strength testing device for new energy vehicles is disclosed. To solve the problem that the alternating stress borne by the spring cannot be truly reflected in the current testing, a servo motor drives the cam block to rotate around a fixed circle. When the cam block rotates one circle, by respectively pushing the intermediate support and the guide support, the cam block applies a compressive force to the spring part twice within one rotation period. At the same time, a re-pressing head is arranged at the tail of the cam block, so that the re-pressing head contacts the detection pressing plate once within one period, further increasing the extrusion of the spring part, ensuring that during the testing process of the spring part, the cam block applies different loads to the spring part within one rotation period, ensuring that the spring part is always under alternating loads for operation, so as to better reflect the state of the spring part under alternating loads.

[0005] However, the following defects still exist in the specific use of the above patent: 1. In the fatigue strength testing equipment for new energy vehicles, if any one of the spring components shows elastic fatigue, it will cause the spring component to be unable to normally push the retaining ring to the left, thereby enabling the corresponding piston tube to open the resonance cavity and emit a sound to warn the staff. However, although this warning method can remind the staff that a spring component has fatigue, it cannot accurately indicate which specific spring component has a problem. This means that the staff needs to check each spring component one by one to determine which spring component has fatigue, which will increase the workload and reduce the detection efficiency. Moreover, if the faulty spring component is not discovered and replaced in time, it will break down during use and pose a threat to the safety performance of the new energy vehicle.

[0006] 2. In the above patent, the cam block can only compress the spring component reciprocally twice when it rotates one circle, which results in a low pressing frequency and a long detection time. Due to the low pressing frequency, the time required to complete the entire test cycle will be longer, which directly increases the time cost of the test. This means that within the same test time, the number of spring components that can be tested will decrease, thus limiting the test production capacity. At a lower pressing frequency, the fatigue accumulation effect of the spring component may not be obvious enough, which may lead to an inaccurate assessment of the fatigue strength of the spring component and thus cause errors in the test.

[0007] Therefore, a fatigue strength testing equipment for new energy vehicles is proposed to solve the above problems. Summary of the Invention

[0008] In view of this, the technical problem to be solved by the present invention is to provide a fatigue strength testing equipment for new energy vehicles to solve the problems that the prior art cannot accurately indicate which specific spring component has a problem and that within the same test time, the number of spring components that can be tested will decrease, thus limiting the test production capacity.

[0009] To achieve the above object, the present invention provides the following technical solution: A fatigue strength testing equipment for new energy vehicles, comprising: a frame, the inner wall of the frame is provided with a slide rail, a baffle is rotatably connected to the side of the frame, a driving disk is rotatably connected to the inner wall of the frame, the driving disk is driven to rotate by a motor, a detection pressing plate is arranged inside the frame, an auxiliary pressing plate is arranged inside the frame, and the detection pressing plate is located on the right side of the auxiliary pressing plate. A pulling frame is slidably connected to the top surface of the auxiliary pressing plate. The equipment further includes an auxiliary testing mechanism and an auxiliary adjusting mechanism. The auxiliary testing mechanism is arranged on the bottom surface of the inner wall of the frame, and the auxiliary adjusting mechanism is arranged on the top surface of the auxiliary pressing plate; The auxiliary testing mechanism is used to adjust the fatigue strength test and lubricate the slide rail inside the frame; The auxiliary adjusting mechanism is used to quickly adjust the position of the auxiliary pressing plate.

[0010] As an improvement, the auxiliary testing mechanism includes an electric telescopic rod, which is arranged in a circular array on the surface of the driving disk. A protrusion is fixedly connected to one end of the electric telescopic rod away from the driving disk, and a wedge block is arranged on one side of the detection pressure plate close to the driving disk.

[0011] As an improvement, an auxiliary telescopic rod is arranged between the detection pressure plate and the auxiliary pressure plate, and a spring member is sleeved on the outer surface of the auxiliary telescopic rod, a gasket is arranged on the end of the auxiliary telescopic rod close to the detection pressure plate, a plurality of contacts are fixedly connected to a surface of the detection pressure plate close to the auxiliary pressure plate, and the number of the contacts matches that of the spring member, an alarm is fixedly connected to the outer surface of the frame, the alarm is electrically connected to the contacts, and the number of the alarms matches that of the contacts.

[0012] As an improvement, the inner wall of the frame is rotatably connected to a first rotating column, and a belt is transmission-connected between the first rotating column and the driving disk, the end of the first rotating column away from the frame is fixedly connected to a first bevel gear set, the end of the first bevel gear set away from the first rotating column is fixedly connected to an auxiliary cylinder, the outer surface of the auxiliary cylinder is provided with an arc groove, and a sliding rod is slidably connected to the inside of the arc groove.

[0013] As an improvement, the bottom surface of the inner wall of the frame is fixedly connected to a first cylinder, and the sliding rod is slidably connected to the inside of the first cylinder, the outer surface of the bottom end of the first cylinder is fixedly connected to a connecting tube, the end of the connecting tube away from the first cylinder is fixedly connected to a first auxiliary frame, and the first auxiliary frame is arranged on the bottom surface of the detection pressure plate, and a rotating rod is arranged inside the first auxiliary frame.

[0014] As an improvement, the auxiliary adjustment mechanism includes a second auxiliary frame, which is fixedly connected to the top surface of the auxiliary pressure plate, and a plurality of rings are opened on the side of the pull frame. The second auxiliary frame is fixedly connected to the inside of a second cylinder, and the end of the second cylinder close to the ring is fixedly connected to an auxiliary circular plate, the inside of the second cylinder is slidably connected to a first cylinder, and the end of the first cylinder close to the ring is rotatably connected to a T-shaped auxiliary plate, and the T-shaped auxiliary plate is rotatably connected to the inside of the auxiliary circular plate.

[0015] As an improvement, the end of the second auxiliary frame away from the pulling frame is fixedly connected to the third auxiliary frame, and the two sides of the third auxiliary frame are fixedly connected to the fourth auxiliary frame. The inner wall of the third auxiliary frame is rotatably connected to a pawl, the outer surface of the pawl is engaged with a ratchet, and the end of the ratchet close to the first cylinder is fixedly connected to the third cylinder.

[0016] As an improvement, a threaded groove is provided on the inner wall of the third cylinder. One end of the first cylinder close to the third cylinder is provided with a protrusion, and this protrusion is slidably connected in the threaded groove. A fan blade is rotatably connected to the inner wall of the fourth auxiliary frame, and a belt is connected between the fan blade and the ratchet pawl.

[0017] Compared with the prior art, the present invention provides a fatigue strength testing device for new energy vehicles, which has the following beneficial effects: 1. Through the multiple protrusions provided on the outer surface of the driving disk, during one rotation of the driving disk, the spring member can be compressed more times, which means that more work tasks can be completed in the same time, thus significantly improving production efficiency. Moreover, an electric telescopic rod is connected between the driving disk and the protrusion, and the distance between the protrusion and the driving disk can be adjusted by the telescopic movement of the electric telescopic rod. The telescopic function of the electric telescopic rod enables the distance between the driving disk and the protrusion to be precisely controlled, thereby precisely controlling the compression degree of the spring member. By adjusting the length of the telescopic rod, test parameters such as compression frequency and compression amplitude can be optimized. The optimization of these parameters helps to more accurately simulate the force-bearing situation of the spring member in the actual working environment, thereby improving the accuracy of the test.

[0018] 2. By the rotation of the auxiliary cylinder, the lubricating oil in the first cylinder can be transported to the inside of the first auxiliary frame through the connecting pipe, and the lubricating oil can be evenly applied to the surface of the slide rail through the rotating rod. The lubricating oil can significantly reduce the friction coefficient between the slide rail and the detection pressure plate, thereby reducing the frictional resistance during movement. This helps to reduce the wear of the slide rail and the spring member during the test and extend the service life of the testing device. Moreover, due to the reduction of the frictional resistance, the detection pressure plate on the slide rail can move more smoothly, reducing the energy loss caused by friction. This makes the energy transfer during the test more efficient and helps to improve the accuracy of the test.

[0019] 3. By the rotation of the third cylinder, the first cylinder is driven to expand and contract, thereby controlling the rotation of the T-shaped auxiliary plate. Furthermore, through the T-shaped auxiliary plate, the auxiliary pressure plate is clamped inside the circular ring opened on the pull frame, thereby connecting the auxiliary pressure plate and the pull frame. Compared with the bolt connection in the prior art, bolt connection usually requires a torque tool or other special tools to ensure the tightness of the connection, while the connection method of the present invention can be achieved through a simple rotation operation without using special tools, thus simplifying the operation steps. In addition, when disassembling the bolt connection, the bolts need to be unscrewed one by one, and the process is cumbersome and time-consuming, while the present invention can be easily disassembled through reverse operation, improving the disassembly efficiency and further improving the efficiency of the fatigue strength test of the spring member. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional side view of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the frame of the present invention; Figure 3 Of the present invention Figure 2 Enlarged schematic diagram of the structure at location A in; Figure 4 Schematic diagram of the connection relationship structure of the auxiliary telescopic rod of the present invention; Figure 5 Schematic diagram of the connection relationship structure of the auxiliary cylinder of the present invention; Figure 6 Schematic diagram of the internal structure of the first auxiliary frame of the present invention; Figure 7 Schematic diagram of the internal structure of the second auxiliary frame of the present invention; Figure 8 Schematic diagram of the internal structure of the third auxiliary frame of the present invention; Figure 9 Schematic diagram of the connection relationship structure of the pawl of the present invention; Figure 10 Of the present invention Figure 9 Enlarged schematic diagram of the structure at location B in.

[0021] In the figure: 1. Frame; 11. Baffle; 12. Driving disc; 13. Detection pressing plate; 14. Auxiliary pressing plate; 15. Pulling frame; 2. Auxiliary testing mechanism; 21. Convex block; 22. Electric telescopic rod; 23. Auxiliary telescopic rod; 24. Spring member; 25. Gasket; 26. Contact; 27. Alarm; 28. First rotating column; 29. First bevel gear set; 210. Auxiliary cylinder; 211. Slide bar; 212. First cylinder; 213. Connecting pipe; 214. First auxiliary frame; 215. Rotating rod; 3. Auxiliary adjusting mechanism; 31. Second auxiliary frame; 32. Second cylinder; 33. Auxiliary circular plate; 34. Ring; 35. First cylinder; 36. T-shaped auxiliary plate; 37. Third cylinder; 38. Ratchet; 39. Pawl; 310. Third auxiliary frame; 311. Fourth auxiliary frame; 312. Fan blade. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Next, the present invention will be further described in detail according to the drawings and embodiments.

[0024] Embodiment Please refer to Figures 1 to 6 As shown: In order to solve the problems mentioned in the technical solution, the embodiment of the present application provides a fatigue strength testing device for new energy vehicles, including: a frame 1, the inner wall of the frame 1 is provided with a slide rail, the side of the frame 1 is rotatably connected with a baffle 11, the inner wall of the frame 1 is rotatably connected with a drive disk 12, the drive disk 12 is driven to rotate by a motor, a detection plate 13 is provided inside the frame 1, an auxiliary plate 14 is provided inside the frame 1, and the detection plate 13 is located on the right side of the auxiliary plate 14, the top surface of the auxiliary plate 14 is slidably connected with a pull frame 15, and also includes an auxiliary testing mechanism 2 and an auxiliary adjustment mechanism 3, the auxiliary testing mechanism 2 is arranged on the bottom surface of the inner wall of the frame 1, and the auxiliary adjustment mechanism 3 is arranged on the top surface of the auxiliary plate 14; The auxiliary testing mechanism 2 is used to adjust the fatigue strength test and lubricate the internal slide rails of the rack 1; The auxiliary testing mechanism 2 includes an electric telescopic rod 22, which is arranged in a circular array on the surface of the driving disk 12. The end of the electric telescopic rod 22 away from the driving disk 12 is fixedly connected with a protrusion 21, and a wedge block is arranged on the side of the detection pressure plate 13 close to the driving disk 12.

[0025] An auxiliary telescopic rod 23 is arranged between the detection platen 13 and the auxiliary platen 14, and a spring member 24 is sleeved on the outer surface of the auxiliary telescopic rod 23. A gasket 25 is arranged on the end of the auxiliary telescopic rod 23 close to the detection platen 13. A plurality of contacts 26 are fixedly connected to one side of the detection platen 13 close to the auxiliary platen 14, and the number of the contacts 26 matches that of the spring member 24. An alarm 27 is fixedly connected to the outer surface of the frame 1, and the alarm 27 is electrically connected to the contacts 26, and the number of the alarms 27 matches that of the contacts 26.

[0026] The inner wall of the frame 1 is rotatably connected to a first rotating column 28, and a belt is transmission-connected between the first rotating column 28 and the driving disk 12. The end of the first rotating column 28 away from the frame 1 is fixedly connected to a first bevel gear set 29, and the end of the first bevel gear set 29 away from the first rotating column 28 is fixedly connected to an auxiliary cylinder 210. An arc groove is provided on the outer surface of the auxiliary cylinder 210, and a slide rod 211 is slidably connected inside the arc groove.

[0027] A first cylinder 212 is fixedly connected to the bottom surface of the inner wall of the frame 1, and a sliding rod 211 is slidably connected to the inside of the first cylinder 212. A connecting tube 213 is fixedly connected to the outer surface of the bottom end of the first cylinder 212. An end of the connecting tube 213 away from the first cylinder 212 is fixedly connected to a first auxiliary frame 214, and the first auxiliary frame 214 is arranged on the bottom surface of the detection plate 13. A rotating rod 215 is arranged inside the first auxiliary frame 214.

[0028] Wherein: a slide rail is provided on the inner wall of the frame 1, a wedge block is provided on the surface of the detection pressure plate 13 close to the driving disc 12, the number of the contact points 26 coincides with that of the spring members 24, the alarm 27 is electrically connected to the contact points 26, and the number of the alarms 27 coincides with that of the contact points 26. A belt is drivingly connected between the first rotating column 28 and the driving disc 12. An arc groove is provided on the outer surface of the auxiliary cylinder 210. A piston piece is provided at one end of the slide bar 211 away from the auxiliary cylinder 210, and the piston piece is slidably connected inside the first cylinder 212. The first cylinder 212 can be externally connected to an automatic lubricating oil replenishing device.

[0029] Compared with the prior art, through the implementation of this embodiment, multiple bumps 21 provided on the outer surface of the driving disc 12 can compress the spring members 24 more times during one rotation of the cam block. This means that more work tasks can be completed within the same time, thus significantly improving the production efficiency. Moreover, an electric telescopic rod 22 is connected between the driving disc 12 and the bump 21, and the distance between the bump 21 and the driving disc 12 can be adjusted by the telescopic movement of the electric telescopic rod 22. The telescopic function of the electric telescopic rod 22 enables the distance between the driving disc 12 and the bump 21 to be precisely controlled, thereby precisely controlling the compression degree of the spring members 24. By adjusting the length of the telescopic rod, test parameters such as the compression frequency and compression amplitude can be optimized. The optimization of these parameters helps to more accurately simulate the force-bearing situation of the spring members 24 in the actual working environment, thereby improving the accuracy of the test.

[0030] A further embodiment: Please refer to Figures 7 to 10 as shown in The auxiliary adjustment mechanism 3 is used to quickly adjust the position of the auxiliary pressure plate 14.

[0031] The auxiliary adjustment mechanism 3 includes a second auxiliary frame 31, the second auxiliary frame 31 is fixedly connected to the top surface of the auxiliary pressure plate 14. A plurality of circular rings 34 are provided on the side surface of the pulling frame 15. A second cylinder 32 is fixedly connected inside the second auxiliary frame 31. An auxiliary circular plate 33 is fixedly connected to one end of the second cylinder 32 close to the circular rings 34. A first cylinder 35 is slidably connected inside the second cylinder 32. A T-shaped auxiliary plate 36 is rotatably connected to one end of the first cylinder 35 close to the circular rings 34, and the T-shaped auxiliary plate 36 is rotatably connected inside the auxiliary circular plate 33.

[0032] A third auxiliary frame 310 is fixedly connected to one end of the second auxiliary frame 31 away from the pulling frame 15. Fourth auxiliary frames 311 are fixedly connected to both sides of the third auxiliary frame 310. A ratchet pawl 39 is rotatably connected to the inner wall of the third auxiliary frame 310. A ratchet wheel 38 is meshed with the outer surface of the ratchet pawl 39. A third cylinder 37 is fixedly connected to one end of the ratchet wheel 38 close to the first cylinder 35.

[0033] A threaded groove is provided on the inner wall of the third cylinder 37, a protrusion is provided on one end of the first cylinder 35 close to the third cylinder 37, and the protrusion is slidably connected in the threaded groove, the inner wall of the fourth auxiliary frame 311 is rotatably connected to the fan blade 312, and a belt is transmitted between the fan blade 312 and the pawl 39.

[0034] Among them: the inner wall of the third cylinder 37 is provided with a thread groove, and the two ends of the thread groove are closed loops, the end of the first cylinder 35 close to the third cylinder 37 is provided with a protrusion, and the protrusion is slidably connected in the thread groove, the ratchet 38 rotates clockwise to drive the pawl 39 engaged with it to rotate, and the ratchet 38 cannot drive the pawl 39 to rotate counterclockwise, and a belt is connected between the fan blade 312 and the pawl 39.

[0035] Compared with the prior art, through the implementation of this embodiment, the rotation of the third cylinder 37 drives the first cylinder 35 to extend and retract, thereby controlling the rotation of the T-shaped auxiliary plate 36, and then the auxiliary pressure plate 14 is clamped in the ring 34 opened by the pull frame 15 through the T-shaped auxiliary plate 36, thereby connecting the auxiliary pressure plate 14 to the pull frame 15. Compared with the bolt connection in the prior art, the bolt connection usually requires a torque tool or other special tools to ensure the tightness of the connection, while the connection method of the present invention can achieve connection through a simple rotation operation without the use of special tools, thereby simplifying the operation steps. In addition, the bolt connection requires the bolts to be unscrewed one by one during disassembly, and the process is cumbersome and time-consuming. The present invention can be easily disassembled through reverse operation, which improves the disassembly efficiency and further improves the efficiency of the fatigue strength test of the spring member 24.

[0036] Everything in the above example works like this: The following is the working process of the auxiliary testing mechanism 2 for adjusting the fatigue strength test and lubricating the internal slide rail of the rack 1: During use, the drive disk 12 rotates driven by a motor. The rotation of the drive disk 12 drives the bump 21 and the electric telescopic rod 22 fixedly connected thereto to rotate together. Since a wedge-shaped block is provided inside the detection pressing plate 13 close to the drive disk 12, that is, the rotation of the bump 21 pushes the wedge-shaped block to move away from the drive disk 12, thereby driving the detection pressing plate 13 fixedly connected thereto to move in the direction of the auxiliary pressing plate 14, and then squeezing the spring member 24 provided between the detection pressing plate 13 and the auxiliary pressing plate 14, so as to perform a fatigue strength test. Due to the multiple bumps 21 provided on the outer surface of the drive disk 12, that is, during one rotation of the drive disk 12, the spring member 24 is compressed more times. This means that more work tasks can be completed within the same time, thus significantly improving the production efficiency. Moreover, the distance between the bump 21 and the drive disk 12 can be adjusted by the telescopic movement of the electric telescopic rod 22. The telescopic function of the electric telescopic rod 22 enables the distance between the drive disk 12 and the bump 21 to be accurately controlled, thereby controlling the compression degree of the spring member 24. Thus, test parameters such as compression frequency and compression amplitude can be optimized. The optimization of these parameters helps to more accurately simulate the force-bearing situation of the spring member 24 in the actual working environment, thereby improving the accuracy of the test; Since a contact 26 is provided on the surface of the detection pressing plate 13 close to the auxiliary pressing plate 14, and the number of contacts 26 coincides with that of the spring members 24, that is, when the detection pressing plate 13 pushes the spring member 24 to perform a fatigue strength test, if the spring member 24 shows fatigue, then when the detection pressing plate 13 moves towards the drive disk 12, the gasket 25 connected to the spring member 24 is not sufficient to touch the contact 26. Since the alarm 27 is electrically connected to the contact 26, and the number of alarms 27 coincides with that of the contacts 26, that is, when the gasket 25 no longer touches the contact 26, the corresponding alarm 27 gives an alarm, so as to remind the staff, avoiding the staff checking each spring member 24 one by one to determine which spring member 24 has fatigue, thus reducing the workload and improving the detection efficiency; In addition, when the driving disc 12 rotates, since the first rotating column 28 is connected to the driving disc 12 and the first rotating column 28, the driving disc 12 rotates to drive the first rotating column 28 to rotate, the first rotating column 28 rotates to drive the first bevel gear set 29 fixedly connected thereto to rotate, and the first bevel gear set 29 rotates to drive the auxiliary cylinder 210 to rotate. Since the outer surface of the auxiliary cylinder 210 is provided with an arc groove, and the outer surface of the arc groove is slidably connected with a slide bar 211, that is, the rotation of the auxiliary cylinder 210 drives the slide bar 211 to reciprocate. Since the slide bar 211 is away from the auxiliary cylinder 21 0 is provided with a piston plate at one end, and the piston plate is slidably connected to the inside of the first cylinder 212, and then the lubricating oil in the first cylinder 212 is transported to the inside of the first auxiliary frame 214 through the connecting pipe 213 by the sliding of the sliding rod 211, and the first cylinder 212 can be externally connected to an automatic lubricating oil replenishing device, and then the lubricating oil is evenly applied to the slide rail by rotating the rod 215, thereby reducing the friction coefficient between the slide rail and the detection pressure plate 13, thereby reducing the friction resistance during the movement, which helps to reduce the wear of the slide rail and the spring member 24 during the test process and extend the service life of the test equipment.

[0037] Please refer to the above working process Figures 1 to 6 .

[0038] The following is the working process of the auxiliary adjustment mechanism 3 for quickly adjusting the position of the auxiliary pressing plate 14: During use, when it is necessary to replace the spring member 24 for fatigue testing, the ratchet 38 is driven to rotate counterclockwise by the driving device. Since the ratchet 38 rotates clockwise and drives the pawl 39 engaged therewith to rotate, the counterclockwise rotation of the ratchet 38 cannot drive the pawl 39 to rotate, that is, the ratchet 38 does not rotate at this time, and the pawl 39 rotates counterclockwise to drive the third cylinder 37 fixedly connected thereto to rotate. Since the inner wall of the third cylinder 37 is provided with a threaded groove, and the two ends of the threaded groove are closed loops, and since a protrusion is provided at one end of the first cylinder 35 close to the third cylinder 37, and the protrusion is slidably connected in the threaded groove, the first cylinder 35 is then driven by the rotation of the third cylinder 37 to move in a direction close to the pawl 39, and the movement of the first cylinder 35 drives the T-shaped auxiliary plate 36 rotatably connected thereto to rotate, thereby causing the ring 34 to disengage from the clamping of the T-shaped auxiliary plate 36, thereby separating the auxiliary pressure plate 14 from the pull frame 15, so that the required The spring member 24 of the fatigue test is compared with the bolt connection in the prior art. The bolt connection usually requires a torque tool or other special tools to ensure the tightness of the connection. The connection method of the present invention can achieve connection through a simple rotation operation without the use of special tools, thereby simplifying the operation steps. The present invention can be easily disassembled through a reverse operation, which improves the disassembly efficiency and further improves the efficiency of the fatigue strength test of the spring member 24. In addition, when the driving ratchet 38 rotates clockwise, the ratchet 38 drives the pawl 39 engaged therewith to rotate. Since the fan blade 312 and the pawl 39 are connected by a belt, the fan blade 312 is then driven to rotate, thereby vacuuming the inside of the ring 34 opened by the pull frame 15 to keep the inside of the ring 34 clean, further improving the firmness of the T-shaped auxiliary plate 36 when clamping the ring 34, and facilitating the rapid disassembly of the auxiliary pressure plate 14 to improve work efficiency.

[0039] Please refer to the above working process Figures 7 to 10 .

[0040] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue strength testing device for new energy vehicles, comprising: Frame (1), the inner wall of the frame (1) is provided with a slide rail, the side of the frame (1) is rotatably connected with a baffle (11), the inner wall of the frame (1) is rotatably connected with a driving disk (12), the driving disk (12) is driven to rotate by a motor, the inside of the frame (1) is provided with a detection pressing plate (13), the inside of the frame (1) is provided with an auxiliary pressing plate (14), and the detection pressing plate (13) is located on the right side of the auxiliary pressing plate (14). The top surface of the auxiliary pressing plate (14) is slidably connected with a pulling frame (15). It is characterized in that it further includes an auxiliary testing mechanism (2) and an auxiliary adjusting mechanism (3). The auxiliary testing mechanism (2) is arranged on the bottom surface of the inner wall of the frame (1), and the auxiliary adjusting mechanism (3) is arranged on the top surface of the auxiliary pressing plate (14). The auxiliary testing mechanism (2) is used to adjust the fatigue strength test and lubricate the slide rail inside the frame (1). The auxiliary adjusting mechanism (3) is used to quickly adjust the position of the auxiliary pressing plate (14).

2. The fatigue strength testing device for a new energy vehicle according to claim 1, characterized in that: The auxiliary testing mechanism (2) includes electric telescopic rods (22), the electric telescopic rods (22) are arranged in a circumferential array on the surface of the driving disk (12), one end of the electric telescopic rod (22) far away from the driving disk (12) is fixedly connected with a convex block (21), and a wedge-shaped block is arranged on the surface of the detection pressing plate (13) close to the driving disk (12).

3. The fatigue strength testing device for a new energy vehicle according to claim 2, characterized in that: An auxiliary telescopic rod (23) is arranged between the detection pressing plate (13) and the auxiliary pressing plate (14), and a spring member (24) is sleeved on the outer surface of the auxiliary telescopic rod (23). One end of the auxiliary telescopic rod (23) close to the detection pressing plate (13) is provided with a gasket (25). A plurality of contacts (26) are fixedly connected to the surface of the detection pressing plate (13) close to the auxiliary pressing plate (14), and the number of the contacts (26) coincides with that of the spring member (24). An alarm (27) is fixedly connected to the outer surface of the frame (1), the alarm (27) is electrically connected to the contacts (26), and the number of the alarms (27) coincides with that of the contacts (26).

4. The fatigue strength testing device for a new energy vehicle according to claim 3, wherein: A first rotating column (28) is rotatably connected to the inner wall of the frame (1), and a belt is connected between the first rotating column (28) and the driving disk (12). One end of the first rotating column (28) far away from the frame (1) is fixedly connected with a first bevel gear set (29). One end of the first bevel gear set (29) far away from the first rotating column (28) is fixedly connected with an auxiliary cylinder (210). An arc groove is formed on the outer surface of the auxiliary cylinder (210), and a slide rod (211) is slidably connected inside the arc groove.

5. The fatigue strength testing device for a new energy vehicle according to claim 4, wherein: The bottom surface of the inner wall of the frame (1) is fixedly connected to a first cylinder (212), and the sliding rod (211) is slidably connected to the inside of the first cylinder (212). The outer surface of the bottom end of the first cylinder (212) is fixedly connected to a connecting tube (213), and one end of the connecting tube (213) away from the first cylinder (212) is fixedly connected to a first auxiliary frame (214), and the first auxiliary frame (214) is arranged on the bottom surface of the detection pressure plate (13), and a rotating rod (215) is arranged inside the first auxiliary frame (214).

6. The fatigue strength testing device for a new energy vehicle according to claim 1, characterized in that: The auxiliary adjustment mechanism (3) comprises a second auxiliary frame (31), the second auxiliary frame (31) is fixedly connected to the top surface of the auxiliary pressure plate (14), a plurality of circular rings (34) are provided on the side of the pull frame (15), a second cylinder (32) is fixedly connected to the inside of the second auxiliary frame (31), an end of the second cylinder (32) close to the circular ring (34) is fixedly connected to the auxiliary circular plate (33), a first cylinder (35) is slidably connected to the inside of the second cylinder (32), an end of the first cylinder (35) close to the circular ring (34) is rotatably connected to a T-shaped auxiliary plate (36), and the T-shaped auxiliary plate (36) is rotatably connected to the inside of the auxiliary circular plate (33).

7. The fatigue strength testing device for a new energy vehicle according to claim 6, characterized in that: The end of the second auxiliary frame (31) away from the pulling frame (15) is fixedly connected to the third auxiliary frame (310), and both sides of the third auxiliary frame (310) are fixedly connected to fourth auxiliary frames (311). The inner wall of the third auxiliary frame (310) is rotatably connected to a pawl (39), the outer surface of the pawl (39) is meshed with a ratchet (38), and the end of the ratchet (38) close to the first cylinder (35) is fixedly connected to the third cylinder (37).

8. An endurance strength testing device for a new energy vehicle according to claim 7, characterized in that: The inner wall of the third cylinder (37) is provided with a thread groove, one end of the first column (35) close to the third cylinder (37) is provided with a protrusion, and the protrusion is slidably connected in the thread groove, the inner wall of the fourth auxiliary frame (311) is rotatably connected with a fan blade (312), and a belt is transmission-connected between the fan blade (312) and the ratchet (39).

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