A fatigue strength testing equipment for new energy vehicles

Abstract

The present invention discloses a fatigue strength testing device for new energy vehicles, comprising: a frame, an inner wall of the frame is provided with a slide rail, the side of the frame is rotatably connected to a baffle, the inner wall of the frame is rotatably connected to a drive disk, the drive disk is driven to rotate by a motor, a detection pressure plate is provided inside the frame, an auxiliary pressure plate is provided inside the frame, and the detection pressure plate is located on the right side of the auxiliary pressure plate, the top surface of the auxiliary pressure plate is slidably connected to a pull rack, and also includes an auxiliary testing mechanism and an auxiliary adjustment mechanism. The auxiliary testing mechanism can compress the spring part more times during the process of one rotation of the drive disk, which means that more work tasks can be completed in the same time, thereby significantly improving production efficiency. The auxiliary adjustment mechanism connects the auxiliary pressure plate to the pull rack through a T-shaped auxiliary plate. Compared with the comparative document, the present invention can achieve connection through a simple rotation operation, without the use of special tools, and simplifies the operation steps.

Description

Technical Field

[0001] The present invention relates to the technical field related to mechanical component testing, and in particular to fatigue strength testing equipment for new energy vehicles. Background Art

[0002] With the rapid development of the new energy vehicle industry, the reliability requirements for automotive components are becoming increasingly stringent. As a crucial component of new energy vehicles, the performance of water pumps directly impacts the overall vehicle's operating efficiency and safety. Springs are key components in many automotive parts, such as water pumps, hood cable return springs, clutch anti-torsion springs, and shock absorber springs. Their fatigue performance plays a crucial role in their stability and lifespan. According to relevant vehicle parts recycling requirements, these springs can be recycled and remanufactured after a vehicle is scrapped (such as after an accident or when an operating vehicle is scrapped). After remanufacturing, the spring's performance, particularly fatigue testing, is crucial for improving spring reliability and extending its service life.

[0003] However, traditional spring fatigue testing methods primarily focus on individual springs, resulting in relatively limited data and low testing efficiency. Furthermore, these methods typically employ fixed amplitudes and frequencies, failing to accurately reflect the dynamic loads and alternating stresses experienced by springs in actual use. Therefore, developing a spring fatigue testing method that can simulate actual operating conditions has become a pressing issue.

[0004] The Chinese patent with patent publication number CN117990393B discloses a fatigue strength testing equipment for new energy vehicles. In order to solve the problem that the current test cannot truly reflect the alternating stress of the spring, the cam block fixed ring is driven to rotate by a servo motor. When the cam block rotates one circle, the intermediate pull frame and the guide frame are pushed respectively, so that the cam block applies compression force to the spring part twice within one rotation cycle. At the same time, a re-pressure head is provided at the tail of the cam block, so that the re-pressure head contacts the detection pressure plate once within one cycle, further increasing the squeezing of the spring part, ensuring that the spring part is always working under alternating loads during the test. The state of the spring part under alternating loads is better reflected.

[0005] However, the above patent still has the following defects when used in practice:

[0006] 1. In the fatigue strength testing equipment for new energy vehicles, if any of the spring parts experience elastic fatigue, the spring part will not be able to push the retaining ring to the left normally, causing the corresponding piston tube to open the resonance chamber and make a sound to alert the staff. However, although this warning method can remind the staff that a spring part has fatigued, it cannot accurately point out which specific spring part has a problem. This means that the staff needs to check each spring part one by one to determine which spring part has fatigued, which will increase the workload and reduce the detection efficiency. If the problematic spring part is not discovered and replaced in time, it will break during use and other failures will occur, posing a threat to the safety performance of the new energy vehicle.

[0007] 2. In the above-mentioned patent, the cam block can only compress the spring part reciprocatingly twice when it rotates one circle, which will result in a low pressure frequency and a long detection time. Due to the low pressure 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 parts that can be tested will be reduced, thereby limiting the test capacity. At a lower pressure frequency, the fatigue accumulation effect of the spring part may not be obvious enough, which may lead to inaccurate assessment of the fatigue strength of the spring part, thereby causing errors in the test.

[0008] Therefore, a fatigue strength testing device for new energy vehicles is proposed to solve the above problems. Summary of the Invention

[0009] In view of this, the technical problem to be solved by the present invention is to propose a fatigue strength testing equipment for new energy vehicles to solve the problem that the existing technology cannot accurately point out which specific spring component has a problem, and the number of spring components that can be tested within the same test time will be reduced, thereby limiting the test capacity.

[0010] To achieve the above-mentioned object, the present invention provides the following technical solutions: a fatigue strength testing device for new energy vehicles, comprising: a frame, an inner wall of the frame is provided with a slide rail, a side of the frame is rotatably connected to a baffle, an inner wall of the frame is rotatably connected to a drive disk, the drive disk is driven to rotate by a motor, a detection pressure plate is provided inside the frame, an auxiliary pressure plate is provided inside the frame, and the detection pressure plate is located on the right side of the auxiliary pressure plate, the top surface of the auxiliary pressure plate is slidably connected to a pulling frame, and further comprising an auxiliary testing mechanism and an auxiliary adjustment mechanism, the auxiliary testing mechanism is provided on the bottom surface of the inner wall of the frame, and the auxiliary adjustment mechanism is provided on the top surface of the auxiliary pressure plate;

[0011] The auxiliary testing mechanism is used to adjust the fatigue strength test and lubricate the internal slide rails of the rack;

[0012] The auxiliary adjustment mechanism is used to quickly adjust the position of the auxiliary pressing plate.

[0013] 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. The end of the electric telescopic rod away from the driving disk is fixedly connected with a protrusion, and the side of the detection pressure plate close to the driving disk is provided with a wedge block.

[0014] As an improvement, an auxiliary telescopic rod is provided 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 provided on the end of the auxiliary telescopic rod close to the detection pressure plate, and a plurality of contacts are fixedly connected to a side of the detection pressure plate close to the auxiliary pressure plate, and the number of the contacts matches the number of the spring members, 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 the contacts.

[0015] As an improvement, the inner wall of the frame is rotatably connected to a first rotating column, and a belt is connected to 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.

[0016] 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, and 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.

[0017] 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. Several rings are opened on the side of the pull frame. The interior of the second auxiliary frame is fixedly connected to a second cylinder, and the end of the second cylinder close to the ring is fixedly connected to an auxiliary circular plate. The interior of the second cylinder is slidingly 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 interior of the auxiliary circular plate.

[0018] As an improvement, the second auxiliary frame is fixedly connected to the third auxiliary frame at one end away from the pull frame, and the fourth auxiliary frame is fixedly connected to both sides of the third auxiliary frame. The inner wall of the third auxiliary frame is rotatably connected to a pawl, and 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.

[0019] As an improvement, a threaded groove is provided on the inner wall of the third cylinder, a protrusion is provided at one end of the first cylinder close to the third cylinder, and the protrusion is slidably connected in the threaded groove, the inner wall of the fourth auxiliary frame is rotatably connected to the fan blades, and a belt is connected for transmission between the fan blades and the pawl.

[0020] Compared with the prior art, the present invention provides a fatigue strength testing device for new energy vehicles, which has the following beneficial effects:

[0021] 1. By setting multiple protrusions on the outer surface of the driving disk, the spring part can be compressed more times during the process of one rotation of the driving disk, which means that more work tasks can be completed in the same time, thereby significantly improving production efficiency. 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 extension and retraction 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 degree of compression of the spring part. By adjusting the length of the telescopic rod, the test parameters such as compression frequency, compression amplitude, etc. can be optimized. The optimization of these parameters helps to more accurately simulate the stress conditions of the spring part in the actual working environment, thereby improving the accuracy of the test.

[0022] 2. The rotation of the auxiliary cylinder can transport the lubricating oil in the first cylinder 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 by the rotating rod. The lubricating oil can significantly reduce the friction coefficient between the slide rail and the detection pressure plate, thereby reducing the friction resistance during movement, which helps to reduce the wear of the slide rail and spring parts during the test process and extend the service life of the test equipment. Due to the reduction in friction resistance, the detection pressure plate on the slide rail can move more smoothly, reducing the energy loss caused by friction, which makes the energy transfer during the test more efficient and helps to improve the accuracy of the test.

[0023] 3. The rotation of the third cylinder drives the first cylinder to extend and retract, thereby controlling the rotation of the T-shaped auxiliary plate, and then the auxiliary pressure plate is clamped inside the ring opened by the pull frame through the T-shaped auxiliary plate, thereby connecting the auxiliary pressure plate to the pull frame. 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 unscrewing the bolts one by one during disassembly, which is a cumbersome and time-consuming process. 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 part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional side view of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the frame of the present invention;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at center A;

[0027] Figure 4 This is a schematic diagram of the connection relationship structure of the auxiliary telescopic rod of the present invention;

[0028] Figure 5 This is a schematic diagram of the connection relationship structure of the auxiliary cylinders of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the first auxiliary frame of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the second auxiliary frame of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the third auxiliary frame of the present invention;

[0032] Figure 9 This is a schematic diagram of the pawl connection structure of the present invention;

[0033] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point B in the middle.

[0034] In the picture:

[0035] 1. Frame; 11. Baffle; 12. Drive plate; 13. Detection pressure plate; 14. Auxiliary pressure plate; 15. Pull frame;

[0036] 2. Auxiliary testing mechanism; 21. Bump; 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. Sliding rod; 212. First cylinder; 213. Connecting tube; 214. First auxiliary frame; 215. Rotating rod;

[0037] 3. Auxiliary adjustment 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 blades. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0040] Example

[0041] Please refer to Figures 1 to 6 As shown:

[0042] 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 to a baffle 11, the inner wall of the frame 1 is rotatably connected to a drive disk 12, the drive disk 12 is driven to rotate by a motor, a detection pressure plate 13 is provided inside the frame 1, an auxiliary pressure plate 14 is provided inside the frame 1, and the detection pressure plate 13 is located on the right side of the auxiliary pressure plate 14, the top surface of the auxiliary pressure plate 14 is slidably connected to a pulling frame 15, and also includes an auxiliary testing mechanism 2 and an auxiliary adjustment mechanism 3, the auxiliary testing mechanism 2 is provided on the bottom surface of the inner wall of the frame 1, and the auxiliary adjustment mechanism 3 is provided on the top surface of the auxiliary pressure plate 14;

[0043] The auxiliary testing mechanism 2 is used to adjust the fatigue strength test and lubricate the internal slide rails of the rack 1;

[0044] 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 to a protrusion 21, and the side of the detection pressure plate 13 close to the driving disk 12 is provided with a wedge block.

[0045] An auxiliary telescopic rod 23 is arranged between the detection pressure plate 13 and the auxiliary pressure plate 14, and a spring member 24 is sleeved on the outer surface of the auxiliary telescopic rod 23. A gasket 25 is provided at one end of the auxiliary telescopic rod 23 close to the detection pressure plate 13. A surface of the detection pressure plate 13 close to the auxiliary pressure plate 14 is fixedly connected to a plurality of contacts 26, and the number of 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 alarms 27 matches that of the contacts 26.

[0046] The inner wall of the frame 1 is rotatably connected to a first rotating column 28, and a belt is connected to 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.

[0047] The bottom surface of the inner wall of the frame 1 is fixedly connected to the first cylinder 212, and the slide 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 the connecting tube 213. The end of the connecting tube 213 away from the first cylinder 212 is fixedly connected to the first auxiliary frame 214, and the first auxiliary frame 214 is arranged on the bottom surface of the detection pressure plate 13. A rotating rod 215 is arranged inside the first auxiliary frame 214.

[0048] Among them: the inner wall of the frame 1 is provided with a slide rail, the side of the detection pressure plate 13 close to the driving disk 12 is provided with a wedge block, the number of contacts 26 matches the number of spring members 24, the alarm 27 is electrically connected to the contacts 26, and the number of alarms 27 matches the number of contacts 26, a belt is connected to the first rotating column 28 and the driving disk 12, an arc groove is provided on the outer surface of the auxiliary cylinder 210, a piston plate is provided at the end of the slide rod 211 away from the auxiliary cylinder 210, and the piston plate is slidably connected to the inside of the first cylinder 212, and the first cylinder 212 can be externally connected to an automatic lubricating oil device.

[0049] Compared to the prior art, this embodiment utilizes multiple protrusions 21 disposed on the outer surface of the drive disc 12, allowing the spring member 24 to be compressed more times during one rotation of the cam block. This means that more work tasks can be completed within the same timeframe, significantly improving production efficiency. Furthermore, an electric telescopic rod 22 is connected between the drive disc 12 and the protrusions 21. The telescopic rod 22 can be extended and retracted to adjust the distance between the protrusions 21 and the drive disc 12. The telescopic function of the electric telescopic rod 22 allows the distance between the drive disc 12 and the protrusions 21 to be precisely controlled, thereby precisely controlling the degree of compression of the spring member 24. By adjusting the length of the telescopic rod, test parameters such as compression frequency and compression amplitude can be optimized. Optimizing these parameters helps to more accurately simulate the stress conditions experienced by the spring member 24 in an actual working environment, thereby improving test accuracy.

[0050] Further examples: Please refer to Figures 7 to 10 As shown:

[0051] The auxiliary adjustment mechanism 3 is used to quickly adjust the position of the auxiliary pressing plate 14 .

[0052] The auxiliary adjustment mechanism 3 includes a second auxiliary frame 31, which is fixedly connected to the top surface of the auxiliary pressure plate 14. Several rings 34 are opened on the side of the pull frame 15. The interior of the second auxiliary frame 31 is fixedly connected to the second cylinder 32, and the end of the second cylinder 32 close to the ring 34 is fixedly connected to the auxiliary circular plate 33. The interior of the second cylinder 32 is slidingly connected to the first cylinder 35, and the end of the first cylinder 35 close to the ring 34 is rotatably connected to the T-shaped auxiliary plate 36, and the T-shaped auxiliary plate 36 is rotatably connected to the inside of the auxiliary circular plate 33.

[0053] The end of the second auxiliary frame 31 away from the pulling frame 15 is fixedly connected to the third auxiliary frame 310, and the two sides of the third auxiliary frame 310 are fixedly connected to the fourth auxiliary frame 311. The inner wall of the third auxiliary frame 310 is rotatably connected to a pawl 39, and the outer surface of the pawl 39 is engaged with a ratchet 38. The end of the ratchet 38 close to the first cylinder 35 is fixedly connected to the third cylinder 37.

[0054] 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 connected between the fan blade 312 and the pawl 39.

[0055] 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. A belt is connected between the fan blade 312 and the pawl 39.

[0056] 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 inside 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 unscrewing the bolts one by one during disassembly, which is a cumbersome and time-consuming process. 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 part 24.

[0057] Everything in the above example works as follows:

[0058] The following is the working process of the auxiliary testing mechanism 2 for adjusting the fatigue strength test and lubricating the internal slide rails of the rack 1:

[0059] When in use, the driving disc 12 is driven to rotate by the motor, and the rotation of the driving disc 12 drives the protrusion 21 and the electric telescopic rod 22 fixedly connected thereto to rotate together. Since the detection pressure plate 13 is provided with a wedge block inside the driving disc 12, the rotation of the protrusion 21 pushes the wedge block to move away from the driving disc 12, thereby driving the detection pressure plate 13 fixedly connected thereto to move in the direction of the auxiliary pressure plate 14, thereby squeezing the spring member 24 provided between the detection pressure plate 13 and the auxiliary pressure plate 14, thereby performing a fatigue strength test. Due to the multiple protrusions 21 provided on the outer surface of the driving disc 12, that is, when the driving disc 12 rotates a certain During the coiling process, the spring member 24 is compressed more times, which means that more work tasks can be completed in the same time, thereby significantly improving production efficiency. The distance between the protrusion 21 and the drive disk 12 can be adjusted by the extension and retraction of the electric telescopic rod 22. The extension and retraction function of the electric telescopic rod 22 enables the distance between the drive disk 12 and the protrusion 21 to be precisely controlled, thereby controlling the degree of compression of the spring member 24. This can optimize test parameters such as compression frequency and compression amplitude. The optimization of these parameters helps to more accurately simulate the stress conditions of the spring member 24 in an actual working environment, thereby improving the accuracy of the test.

[0060] Since the detection pressure plate 13 is provided with a contact 26 on one side close to the auxiliary pressure plate 14, and the number of the contacts 26 matches that of the spring members 24, that is, when the detection pressure plate 13 pushes the spring members 24 to perform a fatigue strength test, if the spring members 24 become fatigued, then when the detection pressure plate 13 drives the disk 12 to move, the gasket 25 connected to the spring member 24 is insufficient to touch the contact 26. Since the alarm 27 is electrically connected to the contact 26, and the number of the alarms 27 matches that of the contacts 26, that is, when the gasket 25 no longer touches the contact 26, the corresponding alarm 27 sounds an alarm, thereby reminding the staff, avoiding the staff from checking the spring members 24 one by one to determine which spring member 24 becomes fatigued, thereby reducing workload and improving detection efficiency.

[0061] 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 to the sliding rod 211, that is, the rotation of the auxiliary cylinder 210 drives the sliding rod 211 to reciprocate, since the sliding rod 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 inside the first cylinder 212 is transported to the inside of the first auxiliary frame 214 through the sliding of the sliding rod 211 through the connecting pipe 213, 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 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.

[0062] Please refer to the above working process Figures 1 to 6 .

[0063] The following is the working process of the auxiliary adjustment mechanism 3 for quickly adjusting the position of the auxiliary pressure plate 14:

[0064] When in 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, the pawl 39 engaged with it rotates. 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 fixed to it 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 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 threaded groove, the rotation of the third cylinder 37 drives the first cylinder 35 to move in the direction close to the pawl 39, and the movement of the first cylinder 35 drives the T-shaped auxiliary plate 36 connected to it 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 part 24 of 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 be achieved 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 part 24. In addition, when the ratchet 38 is driven to rotate clockwise, the ratchet 38 drives the pawl 39 engaged with it 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 helping to quickly disassemble the auxiliary pressure plate 14 to improve work efficiency.

[0065] Please refer to the above working process Figures 7 to 10 .

[0066] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue strength testing device for new energy vehicles, comprising: A frame (1), wherein the inner wall of the frame (1) is provided with a slide rail, the side of the frame (1) is rotatably connected to a baffle (11), the inner wall of the frame (1) is rotatably connected to a drive disk (12), the drive disk (12) is driven to rotate by a motor, a detection pressure plate (13) is provided inside the frame (1), an auxiliary pressure plate (14) is provided inside the frame (1), and the detection pressure plate (13) is located on the right side of the auxiliary pressure plate (14), and the top surface of the auxiliary pressure plate (14) is slidably connected to a pull frame (15), characterized in that it also includes an auxiliary testing mechanism (2) and an auxiliary adjustment mechanism (3), the auxiliary testing mechanism (2) is provided on the bottom surface of the inner wall of the frame (1), and the auxiliary adjustment mechanism (3) is provided on the top surface of the auxiliary pressure plate (14); The auxiliary testing mechanism (2) is used for adjusting the fatigue strength test and lubricating the internal slide rail of the frame (1); the auxiliary testing mechanism (2) includes an electric telescopic rod (22), the electric telescopic rod (22) is arranged in a circumferential 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 to a protrusion (21), and the detection pressure plate (13) is provided with a wedge block on a side close to the driving disk (12); An auxiliary telescopic rod (23) is provided between the detection pressure plate (13) and the auxiliary pressure plate (14), and a spring member (24) is sleeved on the outer surface of the auxiliary telescopic rod (23). A gasket (25) is provided on one end of the auxiliary telescopic rod (23) close to the detection pressure plate (13). A plurality of contacts (26) are fixedly connected to one side of the detection pressure plate (13) close to the contacts (26), 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). The auxiliary adjustment mechanism (3) is used to quickly adjust the position of the auxiliary pressure plate (14); 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 rings (34) are provided on the side of the pull frame (15), the interior of the second auxiliary frame (31) is fixedly connected to a second cylinder (32), one end of the second cylinder (32) close to the ring (34) is fixedly connected to an auxiliary circular plate (33), the interior of the second cylinder (32) is slidably connected to a first cylinder (35), one end of the first cylinder (35) close to the ring (34) is rotatably connected to a T-shaped auxiliary plate (36), and the T-shaped auxiliary plate (36) is rotatably connected to the interior of the auxiliary circular plate (33).

2. A fatigue strength testing device for new energy vehicles according to claim 1, characterized in that: The inner wall of the frame (1) is rotatably connected to a first rotating column (28), and a belt is connected between the first rotating column (28) and the driving disc (12). An end of the first rotating column (28) away from the frame (1) is fixedly connected to a first bevel gear set (29), and an 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 formed on the outer surface of the auxiliary cylinder (210), and a slide rod (211) is slidably connected to the interior of the arc groove.

3. A fatigue strength testing device for new energy vehicles according to claim 2, characterized in that: 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 pipe (213). The end of the connecting pipe (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). A rotating rod (215) is arranged inside the first auxiliary frame (214).

4. The fatigue strength testing equipment for new energy vehicles according to claim 1, characterized in that: The end of the second auxiliary frame (31) away from the pull frame (15) is fixedly connected to the third auxiliary frame (310), and both sides of the third auxiliary frame (310) are fixedly connected to the fourth auxiliary frame (311). The inner wall of the third auxiliary frame (310) is rotatably connected to a pawl (39), and the outer surface of the pawl (39) is engaged with a ratchet (38). The end of the ratchet (38) close to the first cylinder (35) is fixedly connected to the third cylinder (37).

5. The fatigue strength testing equipment for new energy vehicles according to claim 4, characterized in that: The inner wall of the third cylinder (37) is provided with a threaded groove, and the first cylinder (35) is provided with a protrusion at one end 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 connected between the fan blade (312) and the pawl (39) for transmission.

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