A performance testing system for a dust cover of a shock absorber for a new energy vehicle and a testing method thereof

Abstract

The present application relates to shock absorber accessory detection technical field, especially in new energy automobile shock absorber dust cover performance test system and its test method, solve the existing technical problems, the performance test system includes base, positioning assembly, fixing frame, storage tank, adjusting assembly, feeding assembly and baffle assembly, the base is provided with the operation table with PLC controller, and the base is provided with collecting groove, the fixing frame is "U" type structure and is vertically arranged on the base, the cavity is provided on the fixing frame, the storage tank is installed on the side wall of the fixing frame, the storage tank is stored in the sandstone for testing, compared with the prior art, the present application can simulate the actual vehicle driving process in the process of road sand splashing to the dust cover impact process and detect the impact resistance of the dust cover in the process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shock absorber accessory detection, and in particular to a performance testing system for a shock absorber dust cover for new energy vehicles and a testing method thereof. BACKGROUND

[0002] With the rapid development of new energy vehicles, the performance requirements for their components are also becoming higher and higher. As an important part of the vehicle suspension system, the performance of the shock absorber directly affects the comfort, handling and safety of the vehicle. The dust cover, as one of the key components of the shock absorber, mainly plays the role of preventing dust, sand and other impurities from entering the interior of the shock absorber, thereby prolonging the service life of the shock absorber.

[0003] However, there are significant differences between traditional fuel vehicles and new energy vehicles in terms of driving environment, power system, etc., which poses new challenges to the performance of the shock absorber dust cover. For example, the motor torque of new energy vehicles is larger, and the acceleration is faster, resulting in higher working frequency of the shock absorber, and the dust cover needs to withstand greater friction and impact.

[0004] The testing equipment currently applied to the shock absorber dust cover on the market is usually designed for the fatigue performance of the dust cover, and the testing method is generally to apply force in the same direction to the dust cover to detect its performance, and cannot simulate the phenomenon generated in actual road conditions for detection. For example, during high-speed driving of the vehicle, due to the setting of the installation position of the shock absorber, the side of the dust cover facing the wheels is more susceptible to impact from the splashing of stones on the road surface, and during the process of the splashing of stones impacting the dust cover, the presence of the shock absorber spring outside also easily causes the stones to collide back and forth between them, which may cause greater damage to the dust cover.

[0005] Therefore, we propose a performance testing system for a shock absorber dust cover for new energy vehicles and a testing method thereof to solve the above problems. SUMMARY

[0006] The present application aims to provide a performance testing system for a shock absorber dust cover for new energy vehicles and a testing method thereof to solve the problems raised in the background.

[0007] In order to solve the above technical problems, the present application provides the following technical solutions:

[0008] A performance testing system for a shock absorber dust cover for new energy vehicles, comprising a base, a positioning assembly, a fixing frame, a storage tank, an adjusting assembly, a feeding assembly and a baffle assembly, wherein the base is provided with an operation table with a PLC controller, and a collecting groove is formed in the base;

[0009] The fixed frame is in a "U" structure and is vertically arranged on the base, and a cavity is formed in the fixed frame and extends through the fixed frame;

[0010] The storage box is mounted on the side wall of the fixed frame, and the storage box stores sand and gravel for testing;

[0011] The positioning assembly is mounted on the base in the vertical direction, the collecting groove is located below and on one side of the positioning assembly, the dustproof sleeve is clamped on the positioning assembly, and the top of the dustproof sleeve is provided with a pressing plate capable of reciprocating in the vertical direction;

[0012] The adjusting assembly is provided with two groups and is arranged on the opposite side walls of the fixed frame, the adjusting assembly is connected with the end of the pressing plate, and the adjusting assembly can control the pressing height of the pressing plate;

[0013] One end of the feeding assembly is rotatably arranged between the inner walls of the cavity, and a corrugated hose is connected between the feeding assembly and the storage box, the sand and gravel falls into the feeding assembly through the storage box and is sprayed in the upward direction to collide with the dustproof sleeve;

[0014] The baffle assembly is arranged between the inner walls of the cavity on the side close to the dustproof sleeve, the baffle assembly can open the outlet of the cavity before the sand and gravel is sprayed, and can restore to the vertical state to block the outlet of the cavity after the sand and gravel is sprayed.

[0015] In one embodiment, the base is provided with a key shaft which is mounted on the base in a threaded connection, and a through hole one is formed in the base and communicates with the collecting groove;

[0016] A rotating motor four is further mounted on one side of the fixed frame on the base, a screw rod is arranged on the output end of the rotating motor four, a vertical groove one is formed in the vertical direction on the side wall of the fixed frame, an adjusting seat is arranged on the screw rod and is in threaded transmission with the screw rod, a protrusion is arranged on one side wall of the adjusting seat and slides between the inner walls of the vertical groove one.

[0017] In one embodiment, the positioning assembly further comprises a positioning shaft and a fixed table;

[0018] A key groove matched with the key shaft is formed in the middle of the bottom of the positioning shaft, the positioning shaft is fixed on the key shaft, the fixed table is fixed on the positioning shaft, a through hole two in a "U" shape is formed in the fixed table, a plurality of positioning seats are rotatably arranged on the fixed table in an eccentric manner, the positioning seat is in a circular table structure, the bottom end of the dustproof sleeve is clamped and fixed between the positioning seat and the positioning shaft, a sub-controller one for driving and adjusting the positioning seat is further mounted on the side wall of the positioning seat, and the sub-controller one and the PLC controller are connected through electrical signals;

[0019] The pressing plate is arranged in a "convex" structure, is slidingly arranged on the positioning shaft, and is provided with through holes three on both ends of the pressing plate, and is further provided with connecting shafts on both ends of the pressing plate;

[0020] A fixing seat is arranged on each vertical side wall of the fixing frame, the fixing seat is provided with a guide rod one in the vertical direction, the guide rod one penetrates through the through hole three and slidingly contacts with the pressing plate, a spring one is sleeved on the guide rod one, the spring one is located between the top wall of the fixing seat and the bottom wall of the pressing plate, and a limiting piece is further arranged at the top end of the guide rod one.

[0021] In an embodiment, an internal storage cavity is arranged in the storage box, and a discharge box is further connected to the bottom of the storage box, a discharge port is arranged in the middle of the bottom wall of the discharge box, a blocking plate is further arranged between the storage cavity and the discharge box, the blocking plate is slidingly arranged between the inner walls of the discharge box, a horizontal fixing plate is arranged on the side wall of the fixing frame, a linear motor is arranged on the fixing plate, one end of the blocking plate is fixedly connected to the output shaft end of the linear motor, and the other end of the blocking plate is always located in the discharge box;

[0022] A limiting block is arranged on the bottom wall of the blocking plate, a contact sensor one is embedded on the side wall of the limiting block, the contact sensor one is connected to the PLC controller through an electrical signal, and the opposite side walls of the fixing plate and the discharge box can contact with the opposite contact sensor one;

[0023] When the limiting block contacts with the fixing plate, the discharge box is not blocked, the end wall of the blocking plate located in the discharge box and the inner wall of the discharge box close to the position of the limiting block are located in the same vertical plane, when the limiting block contacts with the discharge box, the discharge box is not blocked, the end wall of the blocking plate located in the discharge box contacts with the other inner wall of the discharge box away from the position of the limiting block.

[0024] In an embodiment, the adjusting assembly comprises a rotating disc, a rotating disc, an adjusting rod, an adjusting gear one and a linkage handle;

[0025] A rotating ring is arranged on the side wall of the fixing frame, the rotating ring is rotationally arranged between the inner walls of the fixing frame, a torsional spring is further arranged on the rotating ring for resetting adjustment, a connecting bolt is further arranged on the rotating disc for synchronous rotation adjustment, and the linkage handle is arranged between the connecting bolt and the connecting shaft;

[0026] A rotating motor two is arranged between the inner walls of the fixing frame, the rotating disc is arranged on the output shaft end of the rotating motor two, and the rotating disc and the rotating disc are concentrically arranged, a fan-shaped inner cavity is arranged in the rotating disc, the adjusting gear one is rotationally arranged in the inner cavity, a gear shaft is arranged in the middle of the adjusting gear one, a cover plate is arranged at the opening of the inner cavity, the rotating motor three is arranged on the cover plate, and the gear shaft can be arranged on the output end of the rotating motor three and driven to rotate.

[0027] A sub-controller two is installed on the outer surface of the rotating disc and is connected with the PLC controller through electrical signals, and is connected with the rotating motor three through wires;

[0028] The adjusting rod is arranged through the inner wall of the rotating disc, and a plurality of tooth grooves one are formed on the side wall adjacent to the adjusting gear one along the length direction of the adjusting rod, the adjusting gear one is arranged in meshing with the tooth grooves one, a dovetail type guide strip is further installed on the bottom wall of the adjusting rod, the guide strip also slides between the inner wall of the rotating disc, and the side wall of the adjusting rod in contact with the connecting bolt is arranged in a circular arc surface.

[0029] In one embodiment, the feeding assembly comprises a fixed cylinder, a connecting plate, a supporting seat, an adjusting gear two, a piston shaft and a storage seat.

[0030] A pushing cavity is formed in the fixed cylinder, guide grooves are formed on both sides of the pushing cavity along the length direction of the fixed cylinder, one end of the fixed cylinder is rotatably arranged between the inner wall of the cavity through a shaft, a feeding end is arranged on the top surface of the fixed cylinder, a corrugated hose is connected between the discharge port and the feeding end, and two connecting seats one are further arranged on the bottom wall of the fixed cylinder, one end of the connecting rod is rotatably arranged between the side walls of the two connecting seats one through a shaft, and the other end is rotatably arranged on the adjusting seat through a shaft.

[0031] The connecting plate is fixed on the bottom wall of the fixed cylinder, the supporting seat is arranged on the top surface of the connecting plate, the adjusting gear two is rotatably arranged on one side of the supporting seat, the adjusting gear two is provided with a rotating motor five on one side, the rotating motor five is installed on the side wall of the supporting seat, and the adjusting gear two is an incomplete gear.

[0032] The storage seat is arranged in a circular table structure and is provided with a concave surface on the end surface facing the opening direction of the pushing cavity, two guide blocks are further arranged on the circumferential side wall of the storage seat, the guide blocks slide between the inner walls of the guide grooves, a contact sensor two is embedded on the end side wall of the guide groove close to the adjusting gear two, a magnet piece is arranged on the other end side wall of the guide groove, and a magnet piece is also arranged on the side wall opposite to the magnet piece on the guide block.

[0033] The piston shaft is arranged through the fixed cylinder and slides between the inner walls of the end of the fixed cylinder, one end of the piston shaft is integrated with the storage seat, a plurality of tooth grooves two are formed on the piston shaft along the length direction, the adjusting gear two can be in meshing contact with the tooth grooves two and be driven, a spring two is further arranged in the pushing cavity, the spring two is sleeved on the piston shaft, and the spring two is located between the storage seat and the inner wall of one end of the pushing cavity.

[0034] The attractive force between the two magnetic pieces is smaller than the driving force generated when the adjusting gear two meshes with the tooth grooves two.

[0035] In one embodiment, the baffle assembly comprises a baffle one, a baffle two and an electric push rod;

[0036] Two connecting seats three are arranged on the inner wall of one end of the cavity, and the electric push rod is arranged between the side walls of the two connecting seats three through shaft connection and rotation; one end of the baffle one is arranged between the inner walls of the cavity through shaft connection and rotation, and two connecting seats two are arranged on the baffle one; and the end part of the push rod of the electric push rod is also arranged between the side walls of the two connecting seats two through shaft connection and rotation;

[0037] Vertical grooves two are respectively arranged on the opposite side walls of the cavity in the vertical direction, a guide rod two is arranged in the vertical groove two, a spring three is arranged on the guide rod two and fixed to the top end of the vertical groove two, a lifting block is arranged between the inner walls of the vertical groove two in sliding mode, and a guide shaft is arranged between the inner walls of the vertical grooves in the vertical direction in sliding mode; the guide rod two penetrates the lifting block and the guide shaft and can slide and contact them; the lower surface of the lifting block is arranged in a circular arc surface and is always in contact with the guide shaft; the bottom end of the spring three is in contact with the top surface of the lifting block;

[0038] One end of the baffle two is arranged between the other end of the baffle one through shaft connection and rotation; the guide shaft penetrates the other end of the baffle two and is in rotational contact with the other end.

[0039] In one embodiment, an infrared sensor is arranged between the baffle two and the cavity; the infrared sensor is connected with the PLC controller through electrical signals; the receiving end of the infrared sensor is arranged on the bottom end of the baffle two; and the emitting end of the infrared sensor is arranged on the bottom wall of the cavity.

[0040] When the adjusting gear two is just in meshing contact with the tooth groove two on the piston shaft, the guide block is located at one end of the guide groove, and there is an attractive force between them;

[0041] When the adjusting gear two continues to mesh after meshing with the tooth groove two and is just separated from the tooth groove two, the guide block slides to the other end of the guide groove, the contact sensor two is triggered, and the infrared sensor is started under the driving of the PLC controller.

[0042] A testing method of a performance testing system of a dust cover of a shock absorber for a new energy vehicle, comprising the following steps:

[0043] S1, first, the dust cover to be tested is mounted on the positioning shaft, and a pressing plate is mounted above the dust cover; at the same time, the connecting shaft at the end of the pressing plate is connected with the connecting bolt on the rotating disc through the linkage handle, and the connecting bolt is in a vertical upward position at this time;

[0044] S2, then, by controlling the screw rotation output, so that the adjusting seat drives the fixed cylinder to adjust the inclination angle through the connecting rod, stop and keep fixed when adjusting to the required angle for testing, at the same time, according to the need of the test, the height position of the baffle assembly is adjusted;

[0045] S3, subsequently, by controlling the straight reciprocating motion of the baffle plate, the discharging of the storage box is controlled, so that the sand and gravel fall into the fixed cylinder intermittently, and under the ejection action of the storage seat, it is ejected to the side where the dust cover is located, when the sand and gravel are ejected each time, the baffle assembly returns to the vertical state, so that the cavity near the outlet of the dust cover is blocked at this time, so that the sand and gravel can better move back and forth between the dust cover and the side wall of the fixed frame after impacting the outer surface of the dust cover, to simulate the process that the actual sand and gravel splash into the gap between the dust cover and the shock absorber spring and collide back and forth in the gap, at the same time, when the sand and gravel are ejected, the adjusting assembly is controlled to do circular motion synchronously, so that the pressure plate is controlled to adjust up and down reciprocatingly by the linkage handle, so as to produce extrusion to the dust cover, to simulate the extrusion state of the dust cover due to the up and down movement of the shock absorber during the actual sand and gravel splashing process.

[0046] S4, finally, after the test is completed, the pressure plate and the dust cover are taken off in turn, and the dust cover is detected to observe whether there is damage on the surface of the dust cover, how much the damage is and the like, and the comprehensive test conclusion is drawn according to these conditions.

[0047] Compared with the prior art, the beneficial effects achieved by the present application are:

[0048] 1. By setting the adjusting assembly and the positioning assembly and the like structure, the contact time of the adjusting rod on the adjusting assembly and the connecting bolt can be controlled to control the down pressure height of the adjusting pressure plate to the dust cover, so that the effect of the shock absorber on the dust cover in different states can be simulated, and the reset effect of the rotating disc under the action of the torsional spring and the reaction force of the upper spring two to the pressure plate can be utilized to realize the upward reset effect after the pressure plate is pressed down.

[0049] 2. By setting the feeding assembly and the baffle assembly and the like structure, the meshing process of the adjusting gear two and the tooth groove two is utilized to control the potential energy of the storage seat, and the sand and gravel is stored in the storage seat, when the adjusting gear two is separated from the tooth groove two, the sand and gravel is impacted obliquely upward by the potential energy of the storage seat and hits the dust cover, the baffle assembly is adjusted to the vertical state after the sand and gravel is ejected from the feeding assembly, so that the gap at the cavity of the fixed frame is closed, so that the side wall of the fixed frame facing the dust cover is a side wall without gap at this time, and then the sand and gravel can continue to move back and forth between the dust cover and the side wall of the fixed frame after impacting the dust cover, to simulate the process that the actual sand and gravel splashes onto the dust cover and then impacts back and forth between the dust cover and the shock absorber spring. BRIEF DESCRIPTION OF DRAWINGS

[0050] The technical solutions and other beneficial effects of the present application will become apparent from the following detailed description of specific embodiments of the present application, taken in conjunction with the accompanying drawings.

[0051] In the drawings:

[0052] Figure 1 is a schematic diagram of the overall structure of the present application;

[0053] Figure 2 is Figure 1 is a schematic diagram of the overall structure of the present application from another perspective;

[0054] Figure 3 is a schematic diagram of the longitudinal section of the present application;

[0055] Figure 4 is a schematic diagram of the structure of the positioning assembly of the present application;

[0056] Figure 5 is a schematic diagram of the connection of the adjusting assembly and the pressing plate of the present application;

[0057] Figure 6 is a schematic diagram of the installation and driving of the material blocking plate of the present application;

[0058] Figure 7 is a schematic diagram of the structure of the material feeding assembly of the present application;

[0059] Figure 8 is Figure 7 is a schematic diagram of the movement of the material storage seat in the fixed cylinder of the material feeding assembly;

[0060] Figure 9 is a schematic diagram of the structure of the blocking plate assembly of the present application.

[0061] In the diagram: 1. Base; 11. Control panel; 12. Collection trough; 13. Key shaft; 14. Adjustment seat; 15. Screw; 16. Connecting rod; 2. Positioning assembly; 21. Positioning shaft; 22. Fixed platform; 221. Positioning seat; 222. Controller 1; 23. Pressure plate; 231. Connecting shaft; 3. Fixed frame; 31. Fixed seat; 32. Guide rod 1; 321. Limiting component; 33. Fixed plate; 331. Linear motor; 34. Guide rod 2; 35. Lifting block; 36. Cavity; 4. Storage bin; 41. Baffle plate; 411. Limiting block; 412. Contact sensor 1; 5. Adjustment assembly; 51. Rotary disk; 511. Connecting rod 52. Connector; 521. Rotary disc; 522. Controller II; 53. Adjusting rod; 54. Adjusting gear I; 55. Linkage handle; 6. Feeding assembly; 61. Fixed cylinder; 611. Feeding end; 612. Rotating shaft I; 613. Connecting seat I; 614. Guide groove; 615. Magnet piece; 616. Contact sensor II; 62. Connecting plate; 63. Support seat; 64. Adjusting gear II; 65. Piston shaft; 66. Storage seat; 661. Guide block; 7. Baffle assembly; 71. Baffle I; 711. Connecting seat II; 712. Rotating shaft II; 72. Baffle II; 721. Guide shaft; 73. Electric push rod; 74. Connecting seat III. Detailed Implementation

[0062] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0063] like Figures 1-2 As shown, the present invention provides a technical solution: a performance testing system for dust covers of shock absorbers for new energy vehicles, including a base 1, a positioning component 2, a fixing frame 3, a storage box 4, a feeding component 6, and a baffle component 7;

[0064] An operating table 11 with a PLC controller is fixedly installed on the base 1. The positioning component 2 is installed on the base 1 in the vertical direction. The dust cover is set on the positioning component 2. The bottom end of the dust cover is fixedly clamped, while the top of the dust cover can be freely adjusted in the vertical direction, thereby simulating the squeezing and contraction effect of the dust cover during actual car driving.

[0065] The fixed frame 3 is fixedly installed on the base 1 in the vertical direction, and the fixed frame 3 is in a "U" type structure, and the adjusting assembly 5 is arranged on the opposite outer side walls of the two sides of the fixed frame 3, the vertical extrusion effect of the dust cover is realized through the adjusting assembly 5, the storage box 4 is installed on the other vertical side wall of the fixed frame 3, the feeding assembly 6 is arranged below the storage box 4 and is connected with the storage box 4 through the corrugated hose to feed, one end of the feeding assembly 6 is rotatably arranged between the inner walls of the fixed frame 3, the angle of the feeding assembly 6 can be adjusted, the spraying direction of the feeding assembly 6 is towards the dust cover, the baffle assembly 7 is arranged between the inner walls of the fixed frame 3, and the baffle assembly 7 can control the opening or closing state according to whether the feeding assembly 6 feeds.

[0066] It needs to be further explained that by simultaneously controlling the vertical extrusion action of the dust cover and the projection action of the feeding assembly 6 towards the dust cover, the sand and gravel in the feeding assembly 6 contacts the dust cover and moves back and forth between the dust cover and the side wall of the fixed frame 3, so as to simulate the effect that the sand and gravel are splashed and scattered to the outer surface of the dust cover close to the wheel during the actual vehicle driving process.

[0067] As shown in Figure 3 and Figure 4 An open collecting groove 12 is arranged in the inner side of the base 1, the inner wall of one end of the collecting groove 12 is arranged in a slope, a threaded groove is arranged on the base 1, a stud is fixedly connected to the middle of the bottom wall of the key shaft 13, and the stud is installed in the threaded groove in a threaded connection manner.

[0068] The positioning assembly 2 comprises a positioning shaft 21, a fixed table 22 and a pressing plate 23.

[0069] A key groove matched with the key shaft 13 is arranged in the middle of the bottom of the positioning shaft 21, the positioning shaft 21 and the key shaft 13 are fixed through a plug-in manner, a "U" type structure through hole one is arranged outside the key groove, the through hole one is communicated with the collecting groove 12, the cross section of the fixed table 22 is rectangular, a "U" type structure through hole two is also arranged on the fixed table 22, four positioning seats 221 are rotatably arranged on the top surface of the fixed table 22 through a shaft connection manner, the positioning seats 221 are arranged in a circular table structure, a rotary motor one (not shown in the figure) for eccentric rotation adjustment of the positioning seats 221 is installed between the inner walls of the fixed table 22, a sub-controller one 222 is externally embedded on one vertical side wall of the fixed table 22, the sub-controller one 222 and the PLC controller are connected through an electrical signal, the sub-controller one 222 is used for driving control of the four rotary motors one, a ring seat is arranged in the middle of the bottom wall of the positioning seat 221 and is fixed as a whole, and the ring seat and the positioning shaft 21 are fixedly connected through a fastening bolt.

[0070] The pressing plate 23 is arranged in a "convex" structure, and is arranged on the outer surface of the positioning shaft 21 in the vertical direction. Threaded connections are arranged on both ends of the pressing plate 23, and two through holes are arranged on the pressing plate 23.

[0071] The positioning seat 221 and three side walls of the pressing plate 23 are in contact with the concave side walls of the fixing frame 3.

[0072] It should be further explained that the dust cover is sleeved on the positioning shaft 21 from above, and the bottom end of the dust cover is in contact with the top surface of the fixing table 22. Then, the sub-controller 222 is manually pressed, the rotating motor is started, the positioning seat 221 is eccentrically rotated to the side of the dust cover, the bottom end of the dust cover is tightly locked, and then the sub-controller 222 is pressed to stop. After the dust cover is fixed, the pressing plate 23 is arranged above the dust cover and in contact with the top of the dust cover.

[0073] During the test, the pressing plate 23 is controlled to reciprocate up and down, so as to apply force to the top of the dust cover, and the dust cover is controlled to be stretched and contracted under the driving of the pressing plate 23, so as to simulate the stretching and contracting movement of the dust cover under the driving of the shock absorber during the actual driving of the automobile.

[0074] As shown in Figure 1 , Figure 3 and Figure 5 , the fixing seat 31 is fixed on the two vertical side walls of the fixing frame 3 by screws. The vertical guide rod 32 is installed on the fixing seat 31 in a threaded connection manner. The spring 1 is sleeved on the guide rod 1, and the limiting piece 321 is installed on the top of the guide rod 1 in a threaded connection manner. The limiting piece 321 is a nut.

[0075] The guide rod 1 penetrates through the through hole 3 of the pressing plate 23 and is in sliding contact with the inner wall of the through hole 3. The bottom end of the spring 1 is fixedly connected with the top surface of the fixing seat 31, and the top end of the spring 1 is in abutting contact with the lower surface of the pressing plate 23.

[0076] The adjusting assembly 5 includes a rotating disc 51, a rotating disc 52, an adjusting rod 53, an adjusting gear 1 54, and a linkage handle 55.

[0077] A circular groove is formed on the vertical side wall of the fixing frame 3, the rotating disc 51 rotates between the inner walls of the circular groove, and the rotating disc 51 is fixedly installed towards the middle of the side wall of the circular groove, the rotating ring is rotatably arranged between the inner walls of the fixing frame 3, and a torsion spring (not shown in the figure, the torsion spring is a conventional setting technology, which will not be described here) is further arranged between the inner walls of the fixing frame 3 in contact with the rotating ring, the torsion spring is installed on the outer surface of the rotating ring, the connecting bolt 511 is fixedly installed on the rotating disc 51 by threaded connection, and the connecting lever 55 is rotatably arranged between the connecting shaft 231 and the connecting bolt 511 on the same side.

[0078] A rotating motor two (not shown in the figure) is further fixedly installed between the inner walls of the fixing frame 3, the output shaft end of the rotating motor two is fixedly installed with a rotating disc 52, the rotating disc 52 is internally provided with a fan-shaped inner cavity, the opening of the inner cavity is provided with a detachable cover plate (fan-shaped structure, assembled by clamping), the rotating motor three is installed on the cover plate (the installation position of the rotating motor three is located at the middle region of the rotating ring but does not contact the inner side surface of the rotating ring), and the rotating disc 52 is provided with a through hole four, the adjusting rod 53 is slidably arranged between the inner walls of the through hole four, the bottom wall of the adjusting rod 53 is fixedly provided with a dovetail-shaped guide strip, the guide strip also slides between the inner walls of the rotating disc 52, a plurality of tooth grooves one are uniformly formed on one end side wall of the guide strip along the length direction, and the other side wall opposite to the tooth grooves one is provided with a circular arc surface, the circular arc surface of the guide strip can contact and cooperate with the connecting bolt 511, the adjusting gear one 54 is rotatably arranged in the inner cavity and engaged with the tooth grooves one, the gear shaft synchronously rotating with the adjusting gear one 54 penetrates the middle of the adjusting gear one 54, the gear shaft can be installed on the output end of the rotating motor three and output rotation as an output component, the sub-controller two 521 is further fixedly installed on the outer surface of the rotating disc 52, the sub-controller two 521 is connected and controlled between the rotating motor three through wires, and the sub-controller two 521 is connected through electrical signals between the PLC controller.

[0079] It needs to be further explained that in the initial state (that is, the reset state of the torsion spring), the connecting bolt 511 is located Figure 5 vertically upwards, at this time the pressing plate 23 is located at the highest position, and at this time the circular arc surface of the adjusting rod 53 is in contact with the connecting bolt 511, by starting the rotating motor two, the rotating disc 52 is driven by the output shaft to rotate Figure 5As shown counterclockwise rotation, with the rotation of the disc 52, the circumference of the adjustment rod 53 is synchronized with the rotation, and the connecting bolt 511 is driven to rotate, and the connecting bolt 511 drives the rotating disc 51 to rotate and controls the torsional spring to generate force, while the connecting bolt 511 also drives the pressing plate 23 to move downward and exerts pressure on the dust cover, and in the rotation process, as the rotation angle increases, the contact position of the adjustment rod 53 and the connecting bolt 511 is close to the end of the adjustment rod 53, and finally the two are separated in the rotation process, when the adjustment rod 53 and the connecting bolt 511 are separated, the rotating disc 51 is reset to the initial state under the action of the torsional spring, and the pressing plate 23 is reset upward, while the rotating disc 52 and the adjustment rod 53 continue to rotate counterclockwise until the next time the connecting bolt 511 is contacted to drive the pressing plate 23 to realize downward extrusion of the dust cover, and so on until the test is completed.

[0080] Wherein, before the test starts, the rotating motor three can be started first, so that it drives the adjustment gear one 54 to rotate the adjustment rod 53 to contact the connecting bolt 511, and the length of the adjustment rod 53 can be adjusted to the appropriate length according to the test requirements.

[0081] As shown in Figures 2-3 and Figure 6 The inside of the storage box 4 is provided with a storage cavity, and small particle sand (the average particle size is between 1-3mm) is placed in the storage cavity. A hollow structure of the discharge box is fixedly installed on the bottom wall of the storage box 4. A discharge port is formed in the middle of the bottom wall of the discharge box. A corrugated hose is installed below the discharge port in a threaded connection manner.

[0082] A baffle plate 41 is further arranged between the storage cavity and the discharge box. One end of the baffle plate 41 always slides between the inner walls of the discharge box. A horizontal fixing plate 33 is fixedly installed on the side wall of the fixed frame 3. A linear motor 331 is installed on the fixing plate 33. The output shaft end of the linear motor 331 is fixedly connected with one end wall of the baffle plate 41. A limiting block 411 is fixed on the bottom wall of the baffle plate 41 through a screw. Contact sensors one 412 are embedded on the opposite side walls of the limiting block 411. The contact sensors one 412 are connected with the PLC controller through electrical signals.

[0083] It needs to be further explained that the linear motor 331 is started by the PLC controller, the output shaft of the linear motor 331 is elongated and drives the material blocking plate 41 to move to the inside of the discharge box, when the limiting block 411 contacts with the outer wall of the discharge box, the contact sensor one 412 on the side is triggered, the PLC controller immediately stops the linear motor 331, and at this time the material blocking plate 41 completely blocks the outlet channel of the sandstone; on the contrary, when the PLC controller controls the linear motor 331 to reset, the material blocking plate 41 gradually moves from the inside of the discharge box to the outside, when the limiting block 411 contacts with the fixed plate 33, the contact sensor one 412 on the side is triggered, the PLC controller immediately stops the linear motor 331, and at this time the outlet channel for the sandstone falling in the discharge box is completely opened without shielding (that is, the outlet channel area of the sandstone is the largest at this time), and at this time the linear motor 331 is also in the reset state.

[0084] As shown in Figures 2-3 and Figures 7-8 , the rotating motor four is fixedly installed on the base 1, the screw rod 15 is installed on the output end of the rotating motor four, and the rotating motor four is arranged close to the fixed frame 3, the vertical dovetail groove one is formed in the vertical direction on the side wall of the fixed frame 3 close to the rotating motor four, the dovetail-shaped protrusion fixedly connected to the adjusting seat 14 is arranged on the side wall of the fixed frame 3, the protrusion slides between the inner walls of the vertical groove one, the screw rod 15 penetrates through the adjusting seat 14 and is in threaded transmission cooperation with the adjusting seat 14, and the connecting groove is formed in the adjusting seat 14.

[0085] It needs to be further explained that the rotating motor four is started by the PLC controller, the screw rod 15 is rotated and outputted to drive the adjusting seat 14 to move in the vertical direction under the threaded driving action, the upward or downward movement of the adjusting seat 14 is realized by changing the output direction of the rotating motor four, with the vertical movement of the adjusting seat 14, one end of the fixed cylinder 61 is driven by the connecting rod 16 to move up and down, and the other end of the fixed cylinder 61 rotates around the rotating shaft one 612 to adjust the angle of the fixed cylinder 61, so as to change the opening angle of the pushing cavity, so as to simulate the situation that the sandstone hits the dustproof sleeve under different splashing degrees.

[0086] The cavity 36 is formed in the fixed frame 3 and is arranged in a transverse through manner, and the longitudinal section of the cavity 36 is as shown in Figure 3 .

[0087] The feeding assembly 6 includes the fixed cylinder 61, the connecting plate 62, the supporting seat 63, the adjusting gear two 64, the piston shaft 65 and the material storage seat 66.

[0088] The fixed cylinder 61 is in the shape of a cuboid, and a pushing cavity is formed in the fixed cylinder 61. Rotating shafts 612 are fixedly installed on the two side walls of the fixed cylinder 61, and the other ends of the rotating shafts 612 are rotatably arranged on the inner wall of the cavity 36. Two connecting seats 613 are fixedly arranged on the bottom wall of the fixed cylinder 61 by screws. One end of the connecting rod 16 is rotatably arranged between the side walls of the two connecting seats 613 by a shaft connection, and the other end of the connecting rod 16 is rotatably arranged in the connecting groove by a shaft connection.

[0089] The connecting plate 62 is fixedly arranged on the bottom wall of the fixed cylinder 61 by bolts, and a support seat 63 is fixedly arranged on the connecting plate 62 and is arranged perpendicularly to the connecting plate 62. An adjusting gear 64 is rotatably arranged on one side wall of the support seat 63. The adjusting gear 64 is an incomplete gear. A rotating motor 5 is fixedly arranged on the other side wall of the support seat 63. The output shaft of the rotating motor 5 is connected with the adjusting gear 64 and drives the adjusting gear 64 to rotate.

[0090] A storage seat 66 is slidably arranged between the inner walls of the pushing cavity. The surface of the storage seat 66, which faces the opening of the pushing cavity, is concave. The sand and stones entering the fixed cylinder 61 are accumulated in the concave surface. Guide blocks 661 are fixedly arranged on the two side walls of the storage seat 66. Guide grooves 614 are formed in the two opposite side walls of the pushing cavity along the length direction of the two side walls. The length of the guide grooves 614 is the length that the storage seat 66 can displace and adjust (that is, the distance that the storage seat 66 moves in the process of being engaged with and separated from the tooth grooves 2 on the piston shaft 65). The guide blocks 661 slide between the inner walls of the guide grooves 614. Magnet pieces 615 are embedded on one of the guide blocks 661 and the guide grooves 614. A contact sensor 2 is embedded on the other end of the guide grooves 614. The contact sensor 2 is connected with the PLC controller by an electrical signal. The other side wall of the storage seat 66 is fixedly connected with a piston shaft 65. The piston shaft 65 penetrates through the fixed cylinder 61 and is slidably arranged between the inner walls of the end of the fixed cylinder 61. A spring 2 is sleeved on the piston shaft 65. One end of the spring 2 is fixedly connected with the inner wall of the pushing cavity, and the other end of the spring 2 is in contact with the side wall of the storage seat 66. A plurality of tooth grooves 2 are formed along the length direction of the piston shaft 65. The adjusting gear 64 can be engaged with and driven by the tooth grooves 2 during the rotation of the adjusting gear 64.

[0091] A feeding end 611 is fixedly arranged on the fixed cylinder 61 and is communicated with the pushing cavity. The other end of the corrugated hose is fixedly connected with the feeding end 611 by a threaded connection. When the spring 2 is not subjected to any force, the storage seat 66 is located in the feeding end 611. Figure 7The right side of the shown feed end 611, and the guide block 661 is fixed together with one end wall of the guide groove 614 by the suction force on the magnet piece 615 at this time, the suction force between the guide block 661 and the guide groove 614 is smaller than the driving force of the adjusting gear two 64 to the piston shaft 65, that is, when the sand and stone falls into the fixed cylinder 61 from the feed end 611, all of them are located on the left side of the storage seat 66, and under the action of the inclination, the sand and stone falls into the concave surface of the storage seat 66.

[0092] It needs to be further explained that the rotating motor five is started by the PLC controller, so that it drives the adjusting gear two 64 to rotate counterclockwise. Figure 7 When the adjusting gear is in contact with the gear groove two during the rotation process, the piston shaft 65 starts to move linearly along the length direction of the fixed cylinder 61 to the side where the adjusting gear two 64 is located, driven by the rotation of the adjusting gear, the sand and stone temporarily stored in the storage seat 66 moves synchronously to the side with the movement of the storage seat 66, and the storage seat 66 applies force to the spring two during the movement process; when the adjusting gear rotates to leave the gear groove two, the guide block 661 moves to the other end of the guide groove 614 at this time, and triggers the contact sensor two 616, at the same time, under the reverse action of the spring two, the storage seat 66 is stored and applies a pushing force to the storage seat 66, so that the storage seat 66 pushes the sand and stone in the concave surface to the position where the dustproof sleeve is located and collides with the outer surface of the dustproof sleeve along the direction of the pushing cavity, and then the sand and stone feeding process is completed again when the adjusting gear two 64 is engaged with the gear groove two next time, and so on until the test is completed.

[0093] As shown in Figure 3 and Figure 9 The baffle assembly 7 includes a baffle one 71, a baffle two 72, an electric push rod 73 and a connecting seat three 74.

[0094] The two sides of the cavity 36 are provided with vertical grooves two on the inner wall of the fixed frame 3, vertical guide rods two 34 are fixedly installed between the top wall and the bottom wall of the vertical grooves two, and lifting blocks 35 are slidingly arranged between the inner walls of the vertical grooves two, the guide rods two 34 penetrate through the lifting blocks 35 and slidingly contact with them, and springs three are further arranged in the vertical grooves two, the springs three are sleeved on the guide rods two 34, the top ends of the springs three are fixedly connected with the top walls of the vertical grooves two, and the bottom ends thereof abut against the top surfaces of the lifting blocks 35, wherein the lower surface of the lifting block 35 is a circular arc surface.

[0095] Two connecting seats 74 are fixedly installed on one side of the inner wall of cavity 36 by screws. One end of electric push rod 73 is rotatably disposed between the side walls of the two connecting seats 74 by means of shaft connection. A rotating shaft 712 that rotates synchronously is disposed through one end of baffle 71. The two ends of rotating shaft 712 are respectively rotatably disposed between the inner walls of fixed frame 3. Two connecting seats 711 are fixedly installed on the upper surface of baffle 71 by screws. The push rod end of electric push rod 73 is also rotatably disposed between the side walls of the two connecting seats 711 by means of shaft connection.

[0096] One end of the second baffle 72 has a guide shaft 721 that is in rotatable contact with it. The guide shaft 721 slides between the inner walls of the two vertical grooves. The second guide rod 34 passes through the end of the guide shaft 721 and slides in contact with the inner wall. The other end of the second baffle 72 is connected to the other end of the first baffle 71 and is rotatably connected between them by a shaft.

[0097] Among them, the width of baffle 1 71 and baffle 2 72 is equal to the width of cavity 36.

[0098] In addition, the transmitter and receiver of a through-beam infrared sensor are respectively embedded at the bottom end of the second baffle 72 and the bottom wall of the cavity 36 (the transmitter is not shown in the figure, and the through-beam infrared sensor is a conventional prior art and will not be described in detail). The receiver is an arc-shaped structure set at the bottom end of the second baffle 72 (see...). Figure 9 (The shaded area shown) The arc-shaped structure is designed to ensure that the signal from the transmitting end can be received regardless of how the second baffle 72 is adjusted. The through-beam infrared sensor is connected to the PLC controller via an electrical signal. When sand passes between the bottom of the second baffle 72 and the bottom wall of the cavity 36, the signal of the through-beam infrared sensor will be interrupted. When the sand stops passing, the signal of the through-beam infrared sensor is in a normal state. The PLC controller controls the start of the electric push rod 73, so that the first baffle 71 and the second baffle 72 return to the vertical position to block the cavity 36.

[0099] It should be further explained that before the test, the adjustment height of the baffle 72 is set according to the tilt angle of the fixed cylinder 61, and the electric push rod 73 is activated by the PLC controller to retract the push rod, thereby driving the baffle 71 to rotate around the rotating shaft 712. Figure 3 The upper right adjustment causes the baffle 2 72 to move upward synchronously, and the lifting block 35 moves upward along the inner wall of the vertical groove 2 through the guide shaft 721. At the same time, the lifting block 35 applies force to the spring 3. When the adjustment is appropriate, the PLC controller stops the electric push rod 73. At this time, the baffle 1 71 and the baffle 2 72 are maintained in this state.

[0100] When the test is in progress, as the storage seat 66 is continuously moved to the side of the adjusting gear two 64 along with the piston shaft 65, when the guide block 661 on the storage seat 66 moves to one end of the guide groove 614 and triggers the contact sensor two 616, at this time, the adjusting gear two 64 is separated from the second tooth groove on the piston shaft 65, at the same time, when the contact sensor two 616 is triggered, the PLC controller immediately starts the infrared sensor, and enters the working mode, then, the sand and gravel is shot in the upward direction under the pushing force of the storage seat 66, and passes below the baffle two 72, so that the infrared sensor generates an interruption signal, the infrared sensor is activated from the first interruption signal to the last interruption signal, when the last interruption signal ends, the PLC controller immediately starts the electric push rod 73, and the electric push rod 73 is extended to reset, so that the baffle one 71 and the baffle two 72 are reset to the vertical state, and the outlet of the cavity 36 is blocked, then, the sand and gravel contacts and collides with the dust cover, and reciprocates between the dust cover and the side wall of the fixed frame 3 (at this time, the side wall includes the vertical side wall formed by the baffle one 71 and the baffle two 72 in the vertical state), so as to simulate the process that the sand and gravel splashed by the wheel collides back and forth in the gap between the dust cover and the shock absorber spring.

[0101] After the test is completed, the limiting piece 321 is removed from the guide rod one 32, and the connecting shaft 231 is removed from the end of the pressing plate 23, then the pressing plate 23 and the tested dust cover are removed in sequence, and the dust cover is detected in detail to observe whether there is damage on the surface, how the damage is, and the like, and the simulation test conclusion of the dust cover of the shock absorber can be obtained by comprehensively analyzing the results.

[0102] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or the communication or interaction relationship between two elements. For those skilled in the art, the meaning of the above terms in the present application can be understood according to the specific circumstances.

[0103] The performance test system and the test method of the dust cover of the shock absorber for the new energy vehicle provided by the embodiment of the application are described in detail in the above, and the principle and the implementation mode of the application are described by applying specific examples in the text. The above embodiment is only used to help understand the technical solution and the core idea of the application. Those skilled in the art should understand that the technical solution recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. The modification or replacement does not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the application.

Claims

1. A performance testing system for a dust cover of a shock absorber for a new energy vehicle, comprising: a base (1), wherein an operation table (11) with a PLC controller is arranged on the base (1), and a collecting groove (12) is formed in the base (1); a fixing frame (3) in a "U" shape and vertically arranged on the base (1), wherein a cavity (36) is formed in the fixing frame (3); a storage tank (4) mounted on the side wall of the fixing frame (3), wherein sand and stones for testing are stored in the storage tank (4); characterized in that the system further comprises: a positioning assembly (2) mounted on the base (1) in a vertical direction, wherein the collecting groove (12) is located below and on one side of the positioning assembly (2), a dust cover is fixed and clamped on the positioning assembly (2), and a pressing plate (23) capable of reciprocating in a vertical direction is arranged on the top of the dust cover; two adjusting assemblies (5) arranged on the opposite side walls of the fixing frame (3), wherein the adjusting assemblies (5) are connected with the end of the pressing plate (23), and the adjusting assemblies (5) can control the pressing height of the pressing plate (23); a feeding assembly (6) rotatably arranged at one end between the inner walls of the cavity (36), wherein a corrugated hose is connected between the feeding assembly (6) and the storage tank (4), and the sand and stones fall into the feeding assembly (6) from the storage tank (4) and are sprayed in an upward direction to collide with the dust cover; a baffle assembly (7) arranged between the inner walls of the cavity (36) on the side close to the dust cover, wherein the baffle assembly (7) can open the outlet of the cavity (36) before the sand and stones are sprayed, and can restore to a vertical state to block the outlet of the cavity (36) after the sand and stones are sprayed.

2. The performance testing system of a dust cover for a shock absorber for a new energy vehicle according to claim 1, characterized in that, A key shaft (13) is threadedly connected to the base (1), and a through hole (1) is formed in the base (1) on the outer side of the key shaft (13) and communicates with the collecting groove (12); A rotary motor (4) is further mounted on one side of the fixing frame (3) on the base (1), a screw rod (15) is arranged on the output end of the rotary motor (4), a vertical groove (1) is formed in the vertical direction on the side wall of the fixing frame (3), an adjusting seat (14) is arranged on the screw rod (15) in a threaded transmission manner, a protrusion is arranged on one side wall of the adjusting seat (14), and the protrusion slides between the inner walls of the vertical groove (1).

3. The performance testing system of a dust cover for a shock absorber for a new energy vehicle according to claim 2, characterized in that, The positioning assembly (2) further comprises a positioning shaft (21) and a fixing table (22). The bottom of the positioning shaft (21) is provided with a key groove matched with the key shaft (13), the positioning shaft (21) is fixed on the key shaft (13), the fixed table (22) is fixed on the positioning shaft (21), and the fixed table (22) is provided with a "U"-shaped through hole two, a plurality of positioning seats (221) are arranged on the fixed table (22) in an eccentric manner, the positioning seat (221) is a circular table structure, the bottom end of the dust cover is clamped and fixed between the positioning seat (221) and the positioning shaft (21), and the side wall of the positioning seat (221) is further provided with a sub-controller one (222) for driving and adjusting the positioning seat (221); the sub-controller one (222) and the PLC controller are connected through electrical signals; The pressing plate (23) is provided in a "convex" structure, and the pressing plate (23) is slidably arranged on the positioning shaft (21); the two ends of the pressing plate (23) are provided with through holes three, and the two ends of the pressing plate (23) are further provided with connecting shafts (231); The fixed seat (31) is arranged on the vertical side wall of the fixed frame (3), the fixed seat (31) is provided with a guide rod one (32) in the vertical direction, the guide rod one (32) penetrates through the through hole three and is in sliding contact with the pressing plate (23), a spring one is arranged on the guide rod one (32), and the spring one is located between the top wall of the fixed seat (31) and the bottom wall of the pressing plate (23); and a limiting piece (321) is arranged at the top end of the guide rod one (32).

4. The performance testing system of a dust cover for a shock absorber for a new energy vehicle according to claim 3, characterized in that, The inside of the storage box (4) is provided with a storage cavity, and the bottom of the storage box (4) is further connected with a discharging box, the bottom wall of the discharging box is provided with a discharging port, a blocking plate (41) is arranged between the storage cavity and the discharging box, the blocking plate (41) is slidably arranged between the inner walls of the discharging box, a fixed plate (33) is arranged on the side wall of the fixed frame (3) in a horizontal manner, a linear motor (331) is arranged on the fixed plate (33), one end of the blocking plate (41) is fixedly connected with the output shaft end of the linear motor (331), and the other end of the blocking plate (41) is always located in the discharging box; A limiting block (411) is arranged on the bottom wall of the blocking plate (41), contact sensors one (412) are embedded on the side walls of the limiting block (411), the contact sensors one (412) and the PLC controller are connected through electrical signals, and the side walls of the fixed plate (33) opposite to the discharging box can be in contact with the contact sensors one (412) opposite thereto; When the limiting block (411) is in contact with the fixed plate (33), the discharging box is not blocked at this time, and the end wall of the blocking plate (41) located in the discharging box and the inner wall of the discharging box close to the position of the limiting block (411) are located in the same vertical plane; when the limiting block (411) is in contact with the discharging box, the discharging box is not blocked at this time, and the end wall of the blocking plate (41) located in the discharging box and the other inner wall of the discharging box away from the position of the limiting block (411) are in contact.

5. The performance testing system of a dust cover for a shock absorber for a new energy vehicle according to claim 4, characterized in that, The adjusting assembly (5) comprises a rotating disc (51), a rotating disc (52), an adjusting rod (53), an adjusting gear one (54), and a linkage handle (55). A rotating ring is installed on the side wall of the rotating disc (51) towards the fixed frame (3), the rotating ring is rotationally arranged between the inner walls of the fixed frame (3), and a torsion spring for resetting and adjusting is further arranged on the rotating ring; a connecting bolt (511) for synchronous rotation and adjustment is further arranged on the rotating disc (51); and a linkage handle (55) is arranged between the connecting bolt (511) and the connecting shaft (231); A rotating motor two is arranged between the inner walls of the fixed frame (3), a rotating disc (52) is arranged on the output shaft end of the rotating motor two, and the rotating disc (52) is concentrically arranged with the rotating disc (51); a fan-shaped inner cavity is formed in the rotating disc (52), an adjusting gear one (54) is rotationally arranged in the inner cavity, a gear shaft is arranged in the middle of the adjusting gear one (54), a cover plate matched with the gear shaft is arranged at the opening of the inner cavity, a rotating motor three is installed on the cover plate, and the gear shaft can be installed on the output end of the rotating motor three and driven to rotate by the rotating motor three; A sub-controller two (521) connected with the PLC controller through an electrical signal is installed on the outer surface of the rotating disc (52), and the sub-controller two (521) is connected with the rotating motor three through wires; An adjusting rod (53) is arranged between the inner walls of the rotating disc (52), a plurality of tooth grooves one are formed in the side wall of the adjusting rod (53) adjacent to the adjusting gear one (54) along the length direction of the adjusting rod (53), the adjusting gear one (54) is meshingly arranged with the tooth grooves one, a dovetail-shaped guide strip is further installed on the bottom wall of the adjusting rod (53), the guide strip also slides between the inner walls of the rotating disc (52), and the side wall of the adjusting rod (53) contacting with the connecting bolt (511) is arranged in a circular arc surface.

6. The performance testing system of a dust cover for a shock absorber for a new energy vehicle according to claim 5, characterized in that, The feeding assembly (6) comprises a fixed cylinder (61), a connecting plate (62), a supporting seat (63), an adjusting gear two (64), a piston shaft (65), and a storage seat (66); A pushing cavity is formed in the fixed cylinder (61), guide grooves (614) are formed on both sides of the pushing cavity along the length direction of the fixed cylinder (61), one end of the fixed cylinder (61) is rotationally arranged between the inner walls of the cavity (36) through a shaft connection, an inlet end (611) is arranged on the top surface of the fixed cylinder (61), a corrugated hose is connected between the outlet and the inlet end (611), and two connecting seats one (613) are further arranged on the bottom wall of the fixed cylinder (61), one end of the connecting rod (16) is rotationally arranged between the side walls of the two connecting seats one (613) through a shaft connection, and the other end thereof is rotationally arranged on the adjusting seat (14) through a shaft connection; The connecting plate (62) is fixed on the bottom wall of the fixed cylinder (61), the supporting seat (63) is arranged on the top surface of the connecting plate (62), and the adjusting gear two (64) is rotationally arranged on one side of the supporting seat (63); a rotating motor five is arranged on one side of the adjusting gear two (64), the rotating motor five is installed on the side wall of the supporting seat (63), and the adjusting gear two (64) is an incomplete gear. The storage seat (66) is in a circular truncated cone structure and is provided with a concave surface on the end surface facing the opening direction of the pushing cavity. Two guide blocks (661) are further provided on the circumferential side wall of the storage seat (66), the guide blocks (661) slide between the inner walls of the guide groove (614), and a contact sensor two (616) is embedded on the end side wall of the guide groove (614) close to the adjusting gear two (64). A magnet sheet (615) is provided on the other end side wall of the guide groove (614), and a magnet sheet (615) is also provided on the side wall of the guide block (661) opposite to the magnet sheet (615); The piston shaft (65) penetrates through the fixed cylinder (61) and slides between the inner walls of the end part of the fixed cylinder (61). One end of the piston shaft (65) is integrated with the storage seat (66), and a plurality of tooth grooves two are formed on the piston shaft (65) along the length direction. The adjusting gear two (64) can be in meshing contact with the tooth grooves two and be driven. A spring two is further provided in the pushing cavity, the spring two is sleeved on the piston shaft (65), and the spring two is located between the storage seat (66) and the inner wall of one end of the pushing cavity. The attractive force between the two magnetic attraction sheets is smaller than the driving force generated when the adjusting gear two (64) meshes with the tooth grooves two.

7. The performance testing system of a dust cover for a shock absorber for a new energy vehicle according to claim 6, characterized in that, The baffle assembly (7) comprises a baffle one (71), a baffle two (72), and an electric push rod (73). Two connecting seats three (74) are mounted on the inner wall of one end of the cavity (36), and the electric push rod (73) is rotatably arranged between the side walls of the two connecting seats three (74) through shaft connection. One end of the baffle one (71) is rotatably arranged between the inner walls of the cavity (36) through shaft connection, and two connecting seats two (711) are mounted on the baffle one (71). The push rod end of the electric push rod (73) is also rotatably arranged between the side walls of the two connecting seats two (711) through shaft connection. Vertical grooves two are respectively formed in the opposite side walls of the cavity (36) along the vertical direction, and guide rods two (34) are arranged in the vertical grooves two. A spring three is sleeved on the guide rod two (34) and fixed to the top end of the vertical groove two. A lifting block (35) is slidably arranged between the inner walls of the vertical grooves two, and a guide shaft (721) is slidably arranged between the inner walls of the vertical grooves along the vertical direction. The guide rod two (34) penetrates through the lifting block (35) and the guide shaft (721) and can slide in contact with them. The lower surface of the lifting block (35) is in a circular arc surface and is always in contact with the guide shaft (721). The bottom end of the spring three is in contact with the top surface of the lifting block (35). One end of the baffle two (72) is rotatably arranged with the other end of the baffle one (71) through shaft connection. The guide shaft (721) penetrates through the other end of the baffle two (72) and is in rotatable contact with it.

8. The performance testing system of a dust cover for a shock absorber for a new energy vehicle according to claim 7, characterized in that, A pair of infrared sensors are further arranged between the baffle two (72) and the cavity (36). The pair of infrared sensors are connected with the PLC controller through electrical signals, and the receiving end of the pair of infrared sensors is arranged on the bottom end of the baffle two (72). The emitting end of the pair of infrared sensors is arranged on the bottom wall of the cavity (36). When the adjusting gear two (64) is just in meshing contact with the second tooth groove on the piston shaft (65), the guide block (661) is located at one end of the guide groove (614) and there is suction between them; When the adjusting gear two (64) continues to mesh after meshing with the second tooth groove and just separates from the second tooth groove, the guide block (661) slides to the other end of the guide groove (614) and the contact sensor two (616) is triggered, and the infrared sensor is also started under the driving of the PLC controller. 9.The test method of the performance test system of the dust cover of the shock absorber for new energy vehicles according to claim 8, characterized in that, Comprise the following steps: S1, first, the dust cover to be tested is installed on the positioning shaft (21), and the pressing plate (23) is installed above the dust cover, and the connecting shaft (231) at the end of the pressing plate (23) is connected with the connecting bolt (511) on the rotating disc (51) through the linkage handle (55), at this time the connecting bolt (511) is in the vertical upward position; S2, then, the rotating output of the control screw (15) is controlled to drive the adjusting seat (14) to adjust the inclination angle of the fixed cylinder (61) through the connecting rod (16), stop and keep fixed when the required angle for testing is reached, and the height position of the baffle assembly (7) is adjusted according to the needs of the test; S3, then, the discharging of the storage tank (4) is controlled by the linear reciprocating motion of the baffle plate (41), so that the gravel falls into the fixed cylinder (61) intermittently, and is ejected to the side where the dust cover is located under the ejection of the storage seat (66), when the gravel ejection is completed each time, the baffle assembly (7) returns to the vertical state, so that the outlet position of the cavity (36) close to the dust cover is blocked, so that the gravel can better move back and forth between the dust cover and the side wall of the fixed frame (3) after impacting the outer surface of the dust cover, to simulate the process of the actual gravel splashing into the gap between the dust cover and the shock absorber spring and colliding back and forth in the gap, at the same time, the adjusting assembly (5) is controlled to do circular motion when the gravel is ejected, so that the pressing plate (23) is controlled to move up and down by the linkage handle (55), so as to produce extrusion feeling to the dust cover, to simulate the extrusion state of the dust cover due to the up and down movement of the shock absorber in the actual process of the automobile driving in the process of gravel splashing; S4, finally, after the test is completed, the pressing plate (23) and the dust cover are removed in turn, and the dust cover is detected to observe whether there is damage on the surface of the dust cover, the damage degree, and the comprehensive test conclusion is drawn according to these conditions.

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