A spring assembly life test device for new energy vehicle valves

Abstract

The application discloses a spring assembly life test device for a new energy automobile valve, and belongs to the technical field of new energy automobile part testing. The device comprises a detection box body, a driving part and two groups of clamping bases. The detection box body is provided with a plurality of guide rods, a first movable plate and a second movable plate movably connected. The driving part adopts an eccentric cam plus connecting rod transmission structure. The clamping base is provided with a lever type rigid clamping block and a locking piece. At least one clamping base is internally embedded with a tension and pressure detection module. The reliable fixation of the spring is realized through the unique lever type bidirectional clamping structure, and the device has the bidirectional synchronous detection capability, thereby solving the problems that the spring fixation is prone to loosening and can only be subjected to one-way compression test in the prior art, greatly improving the test precision and reliability, and adapting to the high-frequency life test requirement of the new energy automobile valve spring.

Description

Technical Field

[0001] This invention relates to the field of testing technology for new energy vehicle components, and specifically to a life testing device for spring assemblies used in valves of new energy vehicles. Background Technology

[0002] The valve system in new energy vehicles is a key component ensuring the normal operation of the vehicle's powertrain. The fatigue life of the spring assembly directly affects the reliability and service life of the valve. Therefore, during valve manufacturing, rigorous life testing of the spring assembly is necessary to ensure it meets the requirements of long-term vehicle operation.

[0003] Most existing spring life testing devices can only perform compression tests and cannot simulate the alternating tensile and compressive loads experienced by valve springs in actual operation. Spring fixing methods often employ planar contact or simple bolt clamping, which are prone to loosening, slippage, or even ejection during high-frequency reciprocating tests. This not only affects the accuracy of test data but also poses serious safety hazards. Furthermore, the detection modules of existing devices can only detect unidirectional pressure and cannot accurately obtain tensile load data, resulting in test results that do not fully reflect the actual performance of the spring. In addition, the spacing adjustment methods of existing devices are cumbersome and difficult to quickly adapt to spring assemblies of different specifications.

[0004] Therefore, there is an urgent need for a life testing device for valve spring assemblies in new energy vehicles that can simultaneously perform bidirectional tensile and compressive testing, ensure reliable spring fixation, achieve high testing accuracy, and be easy to operate. Summary of the Invention

[0005] The present invention aims to solve the problems of existing spring life testing devices, such as unidirectional testing, unreliable fixation, low detection accuracy, and cumbersome operation, and provides a spring assembly life testing device for valves in new energy vehicles.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A life testing device for spring assembly of valves in new energy vehicles includes a testing housing, comprising multiple guide rods and a first movable plate and a second movable plate movably connected to the guide rods. The first and second movable plates are arranged opposite to each other to form a testing area. Locking components are respectively mounted on the end faces of the first and second movable plates facing the testing area, and the inner end of the locking components is provided with a tapered surface. A driving component includes a drive motor, an eccentric cam, and a hinged connecting rod. The eccentric cam is coaxially fixedly connected to the output end of the drive motor, and one end of the connecting rod is eccentrically hinged to the end face of the eccentric cam, while the other end is hinged and fixed to the side wall of the first movable plate. A clamping base includes a fixed base plate and a rigid locking block, and the clamping base is respectively fixedly mounted on the first movable plate. The detection area of ​​the second movable plate is connected to the first and second movable plates via a transmission component. At least one of the clamping bases is embedded with a tension and compression detection module. The fixed base plate has an annular mounting groove. The rigid block is arranged circumferentially along the outer side of the annular mounting groove. The middle area of ​​the rigid block has an elongated through-hole groove. A limit connecting shaft is vertically fixed on the fixed base plate. The limit connecting shaft vertically passes through the elongated through-hole groove and slides to form the lever rotation fulcrum of the rigid block. The outer end face of the rigid block is provided with an inclined surface that presses against the conical surface of the locking component. The tension and compression detection module can simultaneously detect the axial compressive force and axial tensile force on the spring assembly under test.

[0007] Furthermore, the rigid block has an arc-shaped clamping surface on the side facing the annular mounting groove, and the axial width of the arc-shaped clamping surface is greater than the wire diameter of the spring assembly to be tested.

[0008] Furthermore, the second movable plate moves up and down inside the detection chamber via a lead screw.

[0009] Furthermore, the effective locking force of the rigid block satisfies the formula: F=β・k・F0・cotα; where F is the effective locking force, F0 is the pre-tightening force of the locking element, k is the lever arm ratio of the rigid block and k=L1 / L2, L1 is the force arm on the outer side of the block, L2 is the clamping force arm on the inner side of the block, α is the inclination angle of the conical surface, and β is the anti-slip correction coefficient during the spring reciprocating test.

[0010] Furthermore, the depth of the annular mounting groove is less than the diameter of the steel wire of the spring assembly to be tested, and the width is greater than the diameter of the steel wire of the spring assembly to be tested.

[0011] Furthermore, the tapered surface of the locking member is provided with a roller, which makes rolling contact with the inclined surface of the rigid block.

[0012] Furthermore, a limiting protrusion is provided at the end of the limiting connecting shaft. When the locking member moves axially along the fixed base plate, the tapered surface pushes the inclined surface of the rigid block to move towards the center and rotates around the limiting connecting shaft as a fulcrum, so that the inner end of the rigid block moves towards the end face of the spring assembly and presses the spring assembly.

[0013] Furthermore, the inner end of the rigid block is provided with a pressing protrusion, which intersects with the arc-shaped clamping surface to form an L-shaped clamping structure, and the intersection of the pressing protrusion and the arc-shaped clamping surface is provided with a rounded transition.

[0014] Furthermore, the tensile and compressive stress detection module is an elastomer structure capable of generating axial bidirectional elastic deformation, with strain gauges attached to its surface. The strain gauges can simultaneously sense the axial compressive and tensile deformations of the elastomer.

[0015] Furthermore, the locking member and the clamping base are provided with guide components, and the clamping base slides directionally along the guide components.

[0016] Beneficial effects 1. It achieves bidirectional synchronous testing of tension and compression, which can fully simulate the actual working load of valve springs, and the test results are more realistic and reliable.

[0017] 2. It adopts a lever-type two-way clamping structure, which provides both radial clamping force and axial clamping force. It does not loosen or slip during high-frequency testing, ensuring high safety.

[0018] 3. The structure is simple and easy to operate. It can be quickly adapted to valve springs of different specifications, and has high detection accuracy, which greatly improves testing efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of the locking components and rigid blocks in area A under their pressed-in state; Figure 3 This is a front view schematic diagram of an embodiment of the present invention; Figure 4 This is a schematic diagram of the overall structure of an embodiment of the present invention. Figure 2 ; Figure 5 for Figure 3 A magnified view of part M; Figure 6 This is a schematic diagram of the clamping base installation according to an embodiment of the present invention; Figure 7 for Figure 5 A magnified view of N in the middle; Figure 8This is a schematic diagram of the installation of the tensile and compressive strength detection module according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the rigid card block structure according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the locking component structure according to an embodiment of the present invention; Figure 11 for Figure 9 A magnified view of a portion of P; Figure 12 This is a schematic diagram of the limiting protrusion structure according to an embodiment of the present invention.

[0020] The components include: 1. Detection box; 11. Guide rod; 12. First movable plate; 121. Side wall; 13. Second movable plate; 14. Detection area; 15. Locking component; 151. Conical surface; 152. Roller; 16. Lead screw; 2. Drive component; 21. Drive motor; 22. Eccentric cam; 23. Connecting rod; 3. Clamping base; 31. Fixed base plate; 311. Annular mounting groove; 32. Rigid locking block; 321. Long strip through hole groove; 322. Inclined surface; 323. Arc-shaped clamping surface; 324. Pressing protrusion surface; 325. Rounded corner transition; 33. Limiting connecting shaft; 331. Limiting protrusion; 35. Transmission component; 4. Tension and pressure detection module; 5. Guide assembly; 6. Spring assembly. Detailed Implementation

[0021] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0022] See Figures 1 to 12According to the present invention, a life testing device for a spring assembly 6 for a valve in a new energy vehicle includes a testing housing 1, comprising multiple guide rods 11 and a first movable plate 12 and a second movable plate 13 movably connected to the guide rods 11. The first movable plate 12 and the second movable plate 13 are arranged opposite to each other to form a testing area 14. Locking members 15 are respectively mounted on the end faces of the first movable plate 12 and the second movable plate 13 facing the testing area 14. A tapered surface 151 is provided on the inner end of the locking member 15. A driving component 2 includes a driving motor 21, an eccentric cam 22, and a hinged connecting rod 23. The eccentric cam 22 is coaxially fixedly connected to the output end of the driving motor 21. One end of the connecting rod 23 is eccentrically hinged to the end face of the eccentric cam 22, and the other end is hinged and fixed to the side wall 121 of the first movable plate 12. A clamping base 3 includes a fixed base plate 31 and a rigid locking block 32. 3 are respectively fixedly assembled on one side of the detection area 14 of the first movable plate 12 and the second movable plate 13 and are connected to the first movable plate 12 and the second movable plate 13 through the transmission component 35. At least one clamping base 3 is embedded and fixedly equipped with a tension and pressure detection module 4. The fixed base plate 31 has an annular mounting groove 311. The rigid block 32 is arranged circumferentially along the outer side of the annular mounting groove 311. The rigid block 32 has an elongated through hole groove 321. The fixed base plate 31 is vertically fixed with a limit connecting shaft 33. The limit connecting shaft 33 vertically passes through the elongated through hole groove 321 and slides to cooperate, forming the lever rotation fulcrum of the rigid block 32. The outer end face of the rigid block 32 is provided with an inclined surface 322 that is pressed and cooperates with the conical surface 151 of the locking component 15. The tension and pressure detection module 4 can simultaneously detect the axial compressive force and axial tensile force of the spring assembly 6 under test.

[0023] The testing housing 1 provides support and a mounting foundation for the entire device, solving the problems of dispersed component layout and poor stability. Multiple guide rods 11 ensure that the first movable plate 12 and the second movable plate 13 can only move axially, avoiding off-center loading and swaying during movement. The first movable plate 12 and the second movable plate 13 are arranged opposite each other to form the testing area 14, providing a stable space for spring testing. The locking element 15 is used to drive the rigid block 32 to achieve the clamping action, and its inner conical surface 151 converts the axial movement into the radial and rotational movement of the rigid block 32.

[0024] The drive component 2 provides reciprocating motion power to the testing device, the drive motor 21 provides rotational power, the eccentric cam 22 converts the rotational motion into periodic reciprocating motion, and the connecting rod 23 transmits the motion of the eccentric cam 22 to the first movable plate 12, realizing the linear reciprocating motion of the first movable plate 12. This transmission structure of eccentric cam 22 and connecting rod provides smooth motion and low impact, making it particularly suitable for high-frequency life testing.

[0025] The clamping base 3 is used to fix the spring assembly 6 under test, solving the problems of unreliability and easy loosening of existing fixing methods. The fixing base plate 31 provides the mounting foundation for the rigid clamping block 32 and the tension / compression detection module 4. The annular mounting groove 311 is used for the initial positioning of the spring end to ensure the coaxiality of the spring during installation. The rigid clamping block 32 achieves bidirectional clamping of the spring through the lever principle. The elongated through-hole groove 321 cooperates with the limiting connecting shaft 33, serving as both a lever fulcrum and allowing the rigid clamping block 32 to have a certain radial movement. The inclined surface 322 cooperates with the tapered surface 151 of the locking member 15 to convert the axial force of the locking member 15 into the clamping force of the rigid clamping block 32. The tension / compression detection module 4 can simultaneously detect compressive force and tensile force, realizing bidirectional tension / compression testing.

[0026] According to the present invention, a life testing device for a spring assembly 6 used in a valve of a new energy vehicle is provided. The rigid clamping block 32 has an arc-shaped clamping surface 323 on the side facing the annular mounting groove 311. The axial width of the arc-shaped clamping surface 323 is greater than the diameter of the steel wire of the spring assembly 6 under test. The arc-shaped clamping surface 323 is completely fitted with the outer circumference of the spring steel wire, increasing the contact area, reducing local stress concentration, and avoiding damage to the spring steel wire during clamping. The axial width being greater than the wire diameter ensures clamping stability and prevents axial movement of the spring during testing.

[0027] According to the present invention, a life testing device for a spring assembly 6 for a valve in a new energy vehicle is provided, wherein a second movable plate 13 moves up and down within a testing chamber 1 via a lead screw 16. The lead screw 16 transmission structure can precisely adjust the position of the second movable plate 13, thereby changing the distance between the two clamping bases 3, quickly adapting to spring assemblies 6 of different lengths, and improving the versatility of the device.

[0028] According to the life testing device for spring assembly 6 of valve in new energy vehicles provided by the present invention, the effective locking force of rigid block 32 satisfies the formula: F=β・k・F0・cotα; where F is the effective locking force, F0 is the pre-tightening force of locking element 15, k is the lever arm ratio of rigid block and k=L1 / L2, L1 is the force arm on the outer side of block, L2 is the clamping force arm on the inner side of block, α is the inclination angle of tapered surface 151, and β is the anti-slip correction coefficient during spring reciprocating test. Based on the lever torque balance principle and the inclined plane mechanical decomposition principle, an anti-slip correction coefficient β for reciprocating test conditions is also introduced. The functions of each parameter in the formula are as follows: F0 is the manual preload applied by the operator to the locking element 15, which determines the magnitude of the initial input torque.

[0029] k is the lever arm ratio. By adjusting the ratio of L1 and L2, the amplification factor of the clamping force can be changed, so as to obtain a larger locking force with a smaller manual force.

[0030] α is the 151° inclination angle of the conical surface, which determines the force amplification effect of the inclined plane transmission. The smaller the angle, the greater the force amplification ratio, but too small an angle will lead to self-locking.

[0031] β is the anti-slip correction coefficient, which is a correction parameter specifically introduced to address the characteristic of valve springs in new energy vehicles being prone to micro-slippage during reciprocating tests. It is used to offset the attenuation of locking force caused by high-frequency vibration.

[0032] The torque exerted by the locking element 15 on the outside of the rigid block is equal to the torque exerted by the inside of the rigid block on the spring, i.e., F0・L1=F・L2・tanα. Considering the anti-slip requirements during vibration, a correction coefficient β is introduced, resulting in the final formula F=β・k・F0・cotα.

[0033] The lever arm ratio k ranges from 1.0 to 1.5. When k is less than 1.0, the force amplification effect is not obvious, requiring a larger manual pre-tightening force; when k is greater than 1.5, the structural size of the rigid block is too large, affecting the compactness of the device. A k=1.1 is preferred, balancing the force amplification effect and structural size.

[0034] The inclination angle α of the conical surface 151 ranges from 45° to 60°. When α is less than 45°, self-locking is likely to occur, causing the locking element 15 to be unable to loosen; when α is greater than 60°, the force amplification ratio is too small, resulting in insufficient locking force. α = 50° is preferred to balance the force amplification effect and ease of operation.

[0035] The anti-slip correction coefficient β ranges from 1.2 to 1.8. When β is less than 1.2, it cannot effectively offset the attenuation of locking force caused by high-frequency vibration; when β is greater than 1.8, it will lead to excessive locking force, which may damage the spring steel wire. β=1.5 is preferred, suitable for high-frequency test conditions below 10Hz.

[0036] Formula Design Example: For valve springs commonly used in new energy vehicles, with a wire diameter of 6mm, a spring outer diameter of 50mm, and a test frequency of 5Hz, the required effective locking force is no less than 500N. Substituting into the formula: taking k=1.1, α=50° (cot50°≈1.192), β=1.5, the required manual preload force F0=F / (β・k・cotα)=500 / (1.5×1.1×1.192)≈254.3N. This preload force is suitable for the locking requirements of large-size springs, and within the range of manually controllable operation, it can stably output the target locking force, avoiding spring slippage and loosening problems under high-frequency testing conditions.

[0037] According to the present invention, a life testing device for a spring assembly 6 used in a valve of a new energy vehicle has a depth of 311 that is less than the diameter of the steel wire in the spring assembly 6 under test, and a width that is greater than the diameter of the steel wire. The depth being less than the wire diameter ensures that the spring end protrudes beyond the surface of the fixed base plate 31, allowing the rigid clamping block 32 to directly clamp the spring wire without interfering with the fixed base plate 31. The width being greater than the wire diameter facilitates the quick insertion of the spring end into the groove, improving installation efficiency.

[0038] According to the present invention, a life testing device for a spring assembly 6 for a valve in a new energy vehicle is provided. The tapered surface 151 of the locking member 15 is provided with a roller 152, which makes rolling contact with the inclined surface 322 of the rigid locking block 32. The roller 152 converts the sliding friction between the tapered surface 151 and the inclined surface 322 into rolling friction, significantly reducing frictional resistance, making the locking operation easier and smoother, while also reducing component wear and extending service life.

[0039] According to the present invention, a life testing device for a spring assembly 6 for a valve in a new energy vehicle is provided. A limiting protrusion 331 is provided at the end of the limiting connecting shaft 33. When the locking member 15 moves axially along the fixed base plate 31, the tapered surface 151 pushes the inclined surface 322 of the rigid block 32 towards the center and rotates around the limiting connecting shaft 33, causing the inner end of the rigid block 32 to move towards the end face of the spring assembly 6 and press against the spring assembly 6. The limiting protrusion 331 prevents the rigid block 32 from falling off the limiting connecting shaft 33, ensuring the integrity of the structure. The rigid block 32 rotates around the limiting connecting shaft 33, simultaneously generating radial clamping force and axial pressing force, achieving bidirectional fixation of the spring.

[0040] According to the present invention, a life testing device for a spring assembly 6 used in a valve of a new energy vehicle is provided. The inner end of the rigid clamping block 32 is provided with a pressing protrusion 324. The pressing protrusion 324 intersects with the arc-shaped clamping surface 323 to form an L-shaped clamping structure. A rounded corner transition 325 is provided at the intersection of the pressing protrusion 324 and the arc-shaped clamping surface 323. The L-shaped clamping structure simultaneously clamps the outer circumference and end face of the spring, limiting the radial and axial displacement of the spring, making the fixation more reliable. The rounded corner transition 325 allows for a smoother clamping of the spring assembly 6.

[0041] According to the present invention, a life testing device for a spring assembly 6 used in valves of new energy vehicles includes a tensile / compression detection module 4, which is an elastomer structure capable of generating axial bidirectional elastic deformation. Strain gauges are attached to its surface, and these gauges can simultaneously sense the axial compressive and tensile deformations of the elastomer. The elastomer structure generates corresponding elastic deformations when subjected to compressive and tensile forces. The strain gauges convert these deformations into electrical signals, thereby enabling the detection of bidirectional tensile and compressive loads. This integrated detection structure offers high accuracy and fast response, making it particularly suitable for dynamic testing.

[0042] According to the present invention, a life testing device for a spring assembly 6 for a valve in a new energy vehicle is provided, wherein the locking member 15 and the clamping base 3 are provided with a guide assembly 5, and the clamping base 3 slides directionally along the guide assembly 5. The guide assembly 5 ensures the straightness of the locking member 15 during axial movement, prevents the locking member 15 from deviating, and ensures that the clamping force of all rigid blocks 32 is uniform.

[0043] The implementation process and principle of this invention are as follows: Before testing, the position of the second movable plate 13 is adjusted by the lead screw 16 according to the length of the spring assembly 6 to be tested, so that the distance between the two clamping bases 3 is adapted to the length of the spring. Then, the two ends of the spring assembly 6 to be tested are respectively inserted into the annular mounting grooves 311 of the two clamping bases 3 located at the upper and lower parts for preliminary positioning. Then, the transmission component 35 is rotated to move the clamping bases 3 along the guide component 5 towards the locking component 15. The conical surface 151 on the inner side of the locking component 15 pushes the inclined surface 322 of the rigid block 32 through the roller 152. The inner end of the rigid block 32 moves towards the center and the end face of the spring. At the same time, the rigid block 32 rotates with the limiting connecting shaft 33 as the fulcrum. The L-shaped structure formed by the arc-shaped clamping surface 323 and the pressing protrusion 324 tightly clamps the spring. If interference is encountered, the rigid block 32 can be manually pressed against the spring assembly 6.

[0044] Start the drive motor 21, which drives the eccentric cam 22 to rotate. This, in turn, drives the first movable plate 12 to reciprocate linearly along the guide rod 11 via the connecting rod 23. The first movable plate 12 drives the clamping base 3 below to reciprocate, thus applying alternating tensile and compressive loads to the spring assembly 6. The tensile and compressive load detection module 4 monitors the load on the spring in real time and transmits the data to the external control system. After the test is completed, rotate the transmission component 35 in the opposite direction. The rigid latch 32 releases under its own weight and the spring force, allowing the spring assembly 6 to be removed.

[0045] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A spring assembly life test device for a valve of a new energy vehicle, characterized in that, include: The detection chamber includes multiple guide rods and a first movable plate and a second movable plate movably connected to the guide rods. The first movable plate and the second movable plate are arranged opposite to each other to form a detection area. Locking components are respectively installed on the end faces of the first movable plate and the second movable plate facing the detection area. A tapered surface is provided on the inner end of the locking component. The driving component includes a drive motor, an eccentric cam, and a hinged connecting rod. The eccentric cam is coaxially and fixedly connected to the output end of the drive motor. One end of the connecting rod is eccentrically hinged to the end face of the eccentric cam, and the other end is hinged and fixed to the side wall of the first movable plate. The clamping base includes a fixed base plate and a rigid clamping block. The clamping base is fixedly assembled to one side of the detection area of ​​the first movable plate and the second movable plate and is connected to the first movable plate and the second movable plate through a transmission component. At least one of the clamping bases is embedded and fixedly fitted with a tension and compression detection module. The fixed base plate has an annular mounting groove. The rigid clamping block is arranged circumferentially along the outer side of the annular mounting groove. The middle area of ​​the rigid clamping block has an elongated through-hole groove. A limit connecting shaft is vertically fixed on the fixed base plate. The limit connecting shaft vertically passes through the elongated through-hole groove and slides to form the lever rotation fulcrum of the rigid clamping block. The outer end face of the rigid clamping block is provided with an inclined surface that presses against the conical surface of the locking component. The tension and compression detection module can simultaneously detect the axial compressive force and axial tensile force on the spring assembly under test. 2.The spring assembly life test device for a valve of a new energy vehicle according to claim 1, wherein, The rigid clamping block has an arc-shaped clamping surface on the side facing the annular mounting groove, and the axial width of the arc-shaped clamping surface is greater than the wire diameter of the spring assembly to be tested.

3. The spring assembly life testing device for valves in new energy vehicles according to claim 2, characterized in that, The second movable plate moves up and down inside the detection chamber via a lead screw.

4. The spring assembly life testing device for valves in new energy vehicles according to claim 1, characterized in that, The effective locking force of the rigid block satisfies the formula: F=β·k·F0·cotα; where F is the effective locking force, F0 is the pre-tightening force of the locking element, k is the lever arm ratio of the rigid block and k=L1 / L2, L1 is the force arm on the outside of the block, L2 is the clamping force arm on the inside of the block, α is the inclination angle of the conical surface, and β is the anti-slip correction coefficient during the spring reciprocating test.

5. The spring assembly life testing device for valves in new energy vehicles according to claim 1, characterized in that, The depth of the annular mounting groove is less than the diameter of the steel wire of the spring assembly to be tested, and the width is greater than the diameter of the steel wire of the spring assembly to be tested.

6. The spring assembly life testing device for valves in new energy vehicles according to claim 1, characterized in that, The tapered surface of the locking member is provided with a roller, which makes rolling contact with the inclined surface of the rigid block.

7. A spring assembly life testing device for valves in new energy vehicles according to claim 1 or 6, characterized in that, The end of the limiting connecting shaft is provided with a limiting protrusion. When the locking member moves axially along the fixed base plate, the tapered surface pushes the inclined surface of the rigid block to move towards the center and rotates with the limiting connecting shaft as the fulcrum, so that the inner end of the rigid block moves towards the end face of the spring assembly and presses the spring assembly.

8. The spring assembly life testing device for valves in new energy vehicles according to claim 7, characterized in that, The inner end of the rigid block is provided with a pressing protrusion. The pressing protrusion intersects with the arc-shaped clamping surface to form an L-shaped clamping structure. The intersection of the pressing protrusion and the arc-shaped clamping surface is provided with a rounded transition.

9. The spring assembly life testing device for valves in new energy vehicles according to claim 1, characterized in that, The tensile and compressive stress detection module is an elastomer structure capable of generating axial bidirectional elastic deformation, with strain gauges attached to its surface. The strain gauges can simultaneously sense the axial compressive and tensile deformations of the elastomer.

10. A spring assembly life testing device for valves in new energy vehicles according to claim 1, characterized in that, The locking member and the clamping base are provided with guide components, and the clamping base slides directionally along the guide components.

Images