Pressure resistance testing device for injection molding end of air spring

Abstract

The invention discloses a pressure resistance testing device for an injection molding end for an air spring, and relates to the technical field of pressure testing. Comprising a limiting assembly used for limiting the injection molding end for the air spring to move in the horizontal direction during a pressure resistance test, an extrusion assembly used for limiting the injection molding end for the air spring to move in the vertical upward direction during the pressure resistance test, and a stamping assembly used for providing pressure in the vertical upward direction for the bottom end of the interior of the injection molding end for the air spring. And the stamping assembly, the limiting assembly and the extruding assembly share one driving component. High-flow gas is injected to enable a fan wheel to rotate and push an extrusion plate to move upwards, and the pressure of gas entering the top of the extrusion plate along a communicating pipe and acting on the inner bottom end of the injection molding end for the air spring is increased; the injection molding end for the air spring can simulate a rapidly-changed pressure scene in the pressure resistance test process, so that the pressure resistance of the injection molding end for the air spring in the rapidly-changed pressure scene can be accurately tested.

Description

Technical Field

[0001] The invention relates to the technical field of pressure testing, in particular to an injection molding end pressure testing device for an air spring. Background Art

[0002] The injection molded end of the air spring is a key automotive component. It can not only absorb the impact of the road and reduce vibration, but also maintain the stability of the vehicle body and improve riding comfort. Since the injection molded end of the air spring is subjected to repeated compression and extension during operation, it is particularly important to design a test device for the pressure resistance performance of the injection molded end of the air spring.

[0003] After searching, the Chinese utility model patent with publication number "CN221148330U" discloses "a top and bottom cover pressure testing device". The application uses a fixed plate to detect the test object placed on the top of the pressure plate. At this time, the two limiting plates can further limit the surface of the test object, thereby achieving the effect of stable detection of test objects of different sizes, avoiding the use of gaskets or auxiliary tools to limit the unstable test object, and avoiding the test object from tilting or moving during detection, making the detection structure more accurate.

[0004] In addition, the Chinese utility model patent with publication number "CN212110958U" discloses "a sealing cover testing machine". This application inserts a test head with a cone into the sealing cover opening from top to bottom and applies corresponding pressure. If the sealing cover does not crack after the test, it meets the strength requirements. This realizes the strength test of the sealing cover, ensures that the quality of the sealing cover meets the requirements, and reduces the quality control risk.

[0005] However, in actual use, based on the driving environment of the car (for example, a section of road with different road conditions), the injection molding end will be subjected to rapidly changing pressure due to the driving environment, causing the internal structure of the injection molding end to be subjected to huge stress. The above two disclosed devices and similar devices cannot simulate this rapidly changing pressure environment during actual operation, and therefore cannot accurately evaluate the pressure resistance of the injection molding end under actual driving conditions. Summary of the invention

[0006] The object of the present invention is to provide an injection molding end pressure test device for air springs to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a pressure test device for injection molding end of an air spring, comprising:

[0008] Limiting assembly, used to limit the horizontal movement of the injection-molded end of the air spring during the pressure test;

[0009] Extrusion assembly, used to limit the vertical upward movement of the injection molded end of the air spring during the pressure test;

[0010] A stamping assembly, used to provide vertical upward pressure to the bottom end of the injection-molded end of the air spring, wherein the stamping assembly, the limit assembly and the extrusion assembly share a driving component;

[0011] The driving component includes: an electric control part, an air supply part and a rotating part, the rotating part is used to provide power for the operation of the limit assembly, the air supply part is used to provide power for the operation of the stamping assembly, and the electric control part is used to control the operation of the limit assembly, the extrusion assembly and the stamping assembly;

[0012] The stamping assembly comprises:

[0013] A pneumatic sleeve, the pneumatic sleeve is connected to the air supply part, a carrying rod is inserted and fixed inside the pneumatic sleeve, the interior of the carrying rod is a solid setting with hollow middle sections at both ends, a plurality of guide notches for gas flow are opened outside the end where the carrying rod and the pneumatic sleeve are in contact, a fan wheel capable of rotating based on high-flow gas flow is installed outside the carrying rod, the fan wheel and the pneumatic sleeve are adapted, and an extrusion plate inserted outside the carrying rod is assembled and installed on the top of the fan wheel;

[0014] A plurality of connecting pipes for connecting gas are fixed between the top and bottom ends of the air pressure sleeve, and the top of the air pressure sleeve is used to place the injection molding end head for the air spring;

[0015] When the stamping assembly is in operation, high-flow gas drives the fan wheel to rotate and pushes the extrusion plate to move, thereby increasing the gas pressure that enters the top of the extrusion plate along the connecting pipe and acts on the bottom end of the injection molding end for the air spring.

[0016] As a further preferred embodiment of the present technical solution, limiting distance rings are respectively fixed at both ends of the outside of the carrying rod, and the two limiting distance rings are respectively placed in the middle position of the outside of the carrying rod. A threaded section is provided on the outside of the carrying rod between the two limiting distance rings, and the fan wheel is screwed to the outside of the carrying rod based on the threaded section.

[0017] As a further preferred embodiment of the present technical solution, a load-bearing ring for increasing the contact area with the injection-molded end of the air spring is fixed on the top of the pneumatic sleeve, an electronic pressure relief valve tube for discharging gas is installed on the top end of the outside of the pneumatic sleeve, and a spiral tube is fixed on the bottom of the pneumatic sleeve, which is used to communicate with the air supply part.

[0018] As a further preferred embodiment of the present technical solution, the limit assembly includes:

[0019] A triangular plate, a screw connection tube is fixed at the inner center of the triangular plate, the screw connection tube is fixed to the rotating part, and the inside of the screw connection tube is matched with the outside of the spiral tube, and a gas gap is opened at the bottom end of the outside of the screw connection tube, and the gas gap is used to connect the gas supply part;

[0020] The three corners of the top surface of the triangular plate are rotatably connected with folding arms, the top of the outer side of the screw connection tube is rotatably connected with a positioning tripod, and the three corners of the top of the positioning tripod are respectively provided with movable notches, and the top of the folding arm is equipped with an assembly rod passing through the movable notch, and the assembly rod moves along the movable notch in the positioning tripod when the triangular plate rotates;

[0021] The top of the assembly rod is threadedly mounted with an assembly arc arm, and the arc surface of the assembly arc arm moves toward the arc edge of the outer surface of the injection molding end head for the air spring when the triangular plate rotates.

[0022] As a further preferred embodiment of the present technical solution, the driving component is installed in a placement seat, a control panel is provided at one end outside the placement seat, the control panel and the electric control part in the driving component are electrically connected, notches are provided on both sides of the outside of the placement seat, a heat dissipation net is installed at the notches of the placement seat, and a power supply connector and a connecting connector are respectively installed at one end of the outside of the placement seat away from the control panel, the power supply connector is used to provide electrical energy to the driving component, and the connecting connector is used to externally install an air pump.

[0023] As a further preferred embodiment of the present technical solution, the electric control part includes:

[0024] A central control circuit board is installed on one side of the placement seat and is used to control the operation of the entire withstand voltage test device;

[0025] The gas supply part comprises:

[0026] A gas storage tank is installed on the other side of the placement seat, connected to the connecting joint and used to fill gas. A gas pump fixed to the middle end of the placement seat is installed at the discharge end of the gas storage tank, and the gas pipe joint of the gas pump is installed at the gas notch position at the bottom end of the outside of the screw connection tube;

[0027] The rotating part comprises:

[0028] The servo motor is installed at the center of the bottom of the placement seat, and the rotating shaft of the servo motor is fixed to the bottom of the screw connection cylinder.

[0029] As a further preferred embodiment of the present technical solution, storage screw tubes are fixed on the four sides of the interior of the placement seat, a sealing cover is installed on the top of the placement seat, the sealing cover is used to seal the seat opening of the placement seat, and rotatable positioning bolts are inserted and installed on the four sides of the top of the sealing cover, and the positioning bolts are adapted to the storage screw tubes.

[0030] As a further preferred embodiment of the present technical solution, a connecting hole is provided at the center point of the top of the sealing cover, and the connecting hole is matched with the screw connection tube.

[0031] As a further preferred embodiment of the present technical solution, a plug-in groove is provided at one end of the carrying rod away from the guide notch, a limiting pestle is installed in the plug-in groove, and the limiting pestle and the notch at the inner center point of the injection-molded end of the air spring are adapted to each other.

[0032] As a further preferred embodiment of the present technical solution, the extrusion assembly includes:

[0033] A gantry, an electric hydraulic cylinder is fixed at the folding position of the top of the gantry, and the electric hydraulic cylinder is electrically connected to the electric control part;

[0034] The telescopic end of the electric hydraulic cylinder is equipped with an extrusion block, which is used to limit the vertical upward movement of the injection molded end of the air spring during the pressure resistance test. When the electric hydraulic cylinder drives the extrusion block to move downward, the extrusion block applies pressure to the injection molded end of the air spring to simulate the pressure conditions in actual use.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The pressure resistance testing device for the injection molded end of the air spring injects high-flow gas to rotate the fan wheel and push the extrusion plate upward, and increases the gas pressure that enters the top of the extrusion plate along the connecting pipe and acts on the bottom end of the injection molded end of the air spring. This allows the injection molded end of the air spring to simulate a rapidly changing pressure scenario during the pressure resistance test, thereby accurately testing the pressure resistance performance of the injection molded end of the air spring under a rapidly changing pressure scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is an isometric diagram of a pressure resistance testing device for injection-molded ends of air springs according to the present invention;

[0038] Figure 2 The left and right isometric views of the injection molding end pressure test device for the air spring of the present invention;

[0039] Figure 3 It is a main cross-sectional view of the pressure resistance testing device for the injection molding end of the air spring of the present invention;

[0040] Figure 4 An isometric view of the placement seat of the present invention after the drive component and the limit assembly are installed;

[0041] Figure 5 This is a structural diagram of the internal driving components of the placement seat of the present invention;

[0042] Figure 6It is a diagram of the internal structure of the stamping assembly of the present invention;

[0043] Figure 7 It is an assembly diagram of the punch assembly of the present invention with the rod outside the assembly;

[0044] Figure 8 It is a structural composition diagram of the limiting component of the present invention.

[0045] In the figure: 1. control panel; 2. placement seat; 3. heat dissipation net; 4. driving component; 401. sealing cover; 402. connecting hole; 403. positioning bolt; 404. gas storage tank; 405. connecting joint; 406. gas pump; 407. central control circuit board; 408. storage screw tube; 409. servo motor; 5. gantry; 6. injection molding end cover; 7. electric hydraulic cylinder; 8. stamping assembly; 801. air pressure sleeve; 802. bearing ring; 803. extrusion plate; 804. connecting pipe; 805. fan wheel; 806. guide notch; 807. screw tube; 808. threaded section; 809. transmission rod; 810. carrying rod; 811. plug-in slot; 812. electronic pressure relief valve tube; 813. limit pestle; 814. distance ring; 9. Limiting assembly; 901. Screw-on cylinder; 902. Gas notch; 903. Triangular plate; 904. Folding arm; 905. Positioning tripod; 906. Assembly arc arm; 907. Assembly bolt; 908. Assembly rod; 909. Movable notch; 10. Extrusion block; 11. Power supply connector. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Before understanding the present invention, it should be clear that during the specific test operation, the injection molding end of the air spring in the present invention is Figure 1-Figure 8 Specifically, it is an injection molded end cap 6. The test result of the injection molded end cap 6 in the present invention is achieved by an observer visually observing the surface of the injection molded end cap 6 during and after the pressure resistance test.

[0048] Specifically, refer to Figure 1-Figure 8 It can be seen that the pressure resistance test device for injection molding end of air spring proposed by the present invention comprises:

[0049] The limit assembly 9 is used to limit the horizontal movement of the injection-molded end of the air spring during the pressure test.

[0050] It should be clear that reference Figure 6-Figure 8It can be seen that, in the present invention, the limiting component 9 includes:

[0051] Triangular disk 903, a screw connection tube 901 is fixed at the inner center point of the triangular disk 903, the screw connection tube 901 is fixed to the rotating part, and the inside of the screw connection tube 901 is adapted to the outside of the screw tube 807, and a gas gap 902 is opened at the bottom end of the outside of the screw connection tube 901, and the gas gap 902 is used to connect the gas supply part.

[0052] It should be noted that in the present invention, the design of the triangular plate 903 needs to take into account the strength and durability of the material in order to withstand the stress that may occur in high-pressure testing. Specifically, the structural design of the triangular plate 903 allows the injection-molded end of the air spring to be uniformly stressed during the test, thereby ensuring the accuracy and reliability of the test results.

[0053] In addition, in the present invention, the three corners of the top surface of the triangular plate 903 are rotatably connected with folding arms 904, the top end of the outer side of the screw-connected tube 901 is rotatably connected with a positioning tripod 905, and movable notches 909 are respectively opened at the three corners of the top of the positioning tripod 905. An assembly rod 908 passing through the movable notch 909 is installed on the top of the folding arm 904. When the triangular plate 903 rotates, the assembly rod 908 moves along the movable notch 909 in the positioning tripod 905.

[0054] It should be added that reference Figure 8 It can be seen that in the present invention, the length of the movable notch 909 does not exceed half the length of the corner of the positioning tripod 905. In addition, in the present invention, the top of the assembly rod 908 is screwed with an assembly arc arm 906, and the arc surface of the assembly arc arm 906 moves toward the arc edge of the outer surface of the injection molded end of the air spring when the triangular plate 903 rotates. The installation method between the assembly arc arm 906 and the assembly rod 908 is achieved by inserting the assembly bolt 907 inside the assembly arc arm 906 and screwing the assembly bolt 907 into the screw groove opened at the top of the assembly rod 908.

[0055] It should be added that when the limit assembly 9 proposed by the present invention is used, when the triangular plate 903 rotates, the folding arm 904 rotates and drives the assembly rod 908 to move along the movable notch 909 in the positioning tripod 905, thereby realizing the precise positioning of the injection molding end for the air spring. The contact between the arc surface of the assembly arc arm 906 and the arc edge of the outer surface of the injection molding end for the air spring ensures that the injection molding end for the air spring will not be offset during the pressure test, thereby ensuring the accuracy of the test. In addition, the arc design of the assembly arc arm 906 can also reduce damage to the injection molding end for the air spring and extend its service life. The design of the entire limit assembly 9 not only improves the accuracy and reliability of the pressure test, but also makes it easier to operate and improves work efficiency.

[0056] Extrusion assembly used to limit the vertical upward movement of the injection molded end of the air spring during the pressure test.

[0057] It should be clear that reference Figure 1-Figure 3 It can be seen that in the present invention, the extrusion assembly includes:

[0058] The gantry 5 has an electric hydraulic cylinder 7 fixed at the folded edge position on the top of the gantry 5 , and the electric hydraulic cylinder 7 is electrically connected to the electric control part.

[0059] It should be added that, in the present invention, the gantry 5 is installed in the middle of the end of the placement seat 2 away from the control panel 1, and the folded edge position at the top of the gantry 5 is Figure 1-Figure 3 It can be seen that the center point of the air spring with detection coincides with the center point of the injection molding end.

[0060] It should be further explained that in the present invention, an extrusion block 10 is installed at the telescopic end of the electric hydraulic cylinder 7. The extrusion block 10 is used to limit the vertical upward movement of the injection molded end of the air spring during the pressure test. When the electric hydraulic cylinder 7 drives the extrusion block 10 to move downward, the extrusion block 10 applies pressure to the injection molded end of the air spring. On the one hand, it simulates the pressure from the top of the injection molded end of the air spring in actual use, and on the other hand, it limits the vertical upward movement of the injection molded end of the air spring during the pressure test.

[0061] The punching assembly 8 is used to provide vertical upward pressure to the bottom end of the injection-molded end of the air spring.

[0062] It should be clear that reference Figure 1-Figure 8 It can be seen that the stamping assembly 8 includes:

[0063] The pneumatic sleeve 801 is connected with the air supply part, and a carrying rod 810 is inserted and fixed inside the pneumatic sleeve 801. The interior of the carrying rod 810 is a solid structure with hollow middle sections at both ends. A plurality of guide notches 806 for gas flow are provided outside the end where the carrying rod 810 and the pneumatic sleeve 801 are in contact. A fan wheel 805 capable of rotating based on high-flow gas flow is installed outside the carrying rod 810. The fan wheel 805 is adapted to the pneumatic sleeve 801, and an extrusion plate 803 inserted outside the carrying rod 810 is installed on the top of the fan wheel 805.

[0064] It should be noted that in the present invention, the outer surface of the fan wheel 805 and the inner wall of the pneumatic sleeve 801 are movably connected. Specifically, in actual use, the cooperation between the fan wheel 805 and the fan wheel 805 is achieved by a number of elastic elements arranged on the outer surface of the fan wheel 805. These elastic elements can ensure that the fan wheel 805 maintains good sealing during the sliding process of the inner wall of the pneumatic sleeve 801, and at the same time allow the fan wheel 805 to rotate freely when high-flow gas flows. These elastic parts are specifically O-rings in the prior art. The O-rings are sleeved on the outer surface of the fan wheel 805 to form a continuous sealing ring, which fits tightly with the inner wall of the pneumatic sleeve 801, so that when the fan wheel 805 rotates, gas leakage can be effectively prevented. In addition, the elastic characteristics of the O-ring enable the fan wheel 805 to maintain contact with the inner wall of the pneumatic sleeve 801 when subjected to pressure changes, thereby ensuring the stability and reliability of the entire pressure resistance testing device under high-pressure environments.

[0065] It should be further explained that the rotation of the fan wheel 805 can drive the rotation of the carrying rod 810, so that the extrusion plate 803 applies uniform pressure to the injection molding end of the air spring. This design not only improves the accuracy of the pressure test, but also ensures the stability and reliability of the test process.

[0066] Specifically, refer to Figure 7 It can be seen that a plurality of transmission rods 809 for connecting the extrusion plate 803 are fixed at a physical position on the top of the fan wheel 805 , wherein the transmission rods 809 do not interfere with the carrying rods 810 .

[0067] In addition, it should be noted that in the present invention, a plurality of connecting tubes 804 for connecting gas are fixed between the top and bottom ends of the outside of the air pressure sleeve 801, and the top of the air pressure sleeve 801 is used to place the injection molding end for the air spring.

[0068] It should be noted that when the stamping assembly 8 is in operation, the high-flow gas drives the fan wheel 805 to rotate and pushes the extrusion plate 803 to move quickly, instantly increasing the gas pressure that enters the top of the extrusion plate 803 along the connecting pipe 804 and acts on the bottom end of the injection molding end for the air spring.

[0069] It should be emphasized that, during actual operation, the stamping assembly 8 proposed in the present invention can apply a rapidly changing pressure scenario to the injection molded end of the air spring, simulating the rapidly changing pressure under actual working conditions, causing the internal structure of the injection molded end of the air spring to be subjected to huge stress. This rapid response feature ensures the immediacy and accuracy of the pressure test. At the same time, since the contact area between the extrusion plate 803 and the injection molded end of the air spring is large, damage caused by excessive local pressure can be effectively avoided, thereby protecting the integrity of the test sample.

[0070] It should be noted that, since the extrusion plate 803 moves too fast, the material or structure of the injection molding end of the air spring cannot withstand such a drastic dynamic pressure change, thereby causing material fatigue or structural damage. Figure 7 It can be seen that the two ends of the outside of the carrying rod 810 are respectively fixed with limiting rings 814, and the two limiting rings 814 are respectively placed at the middle position of the outside of the carrying rod 810. A threaded section 808 is opened on the outside of the carrying rod 810 between the two limiting rings 814, and the fan wheel 805 is screwed together with the threaded section 808 and the outside of the carrying rod 810.

[0071] It should be added that, by installing a threaded segment 808 on the outside of the carrying rod 810 and allowing the fan wheel 805 to be screwed together based on the threaded segment 808 and the outside of the carrying rod 810, the rotation speed of the fan wheel 805 is limited to a certain extent, thereby adjusting the moving speed of the extrusion plate 803. This design not only ensures that the injection molded end of the air spring will not be damaged due to excessive speed during the pressure test, but also can adjust the rate of pressure application (based on the air flow rate) according to different test requirements to simulate different working conditions. In addition, the setting of the distance ring 814 ensures the stability of the extrusion plate 803 during movement, prevents deviation or vibration caused by excessive speed, thereby improving the accuracy and reliability of the test. Through this sophisticated control mechanism, the pressure test device of the present invention can more effectively evaluate the pressure resistance performance of the injection molded end of the air spring, and ensure its safety and reliability in practical applications.

[0072] Finally, reference Figure 3 It can be seen that in the present invention, a plug-in groove 811 is provided at one end of the carrying rod 810 away from the guide notch 806, and a limiting pestle 813 is installed in the plug-in groove 811. The limiting pestle 813 is adapted to the notch at the center point inside the injection molding end of the air spring.

[0073] It should be clear that the limiting pestle 813 provided in the present invention can prevent the extrusion plate 803 from unnecessary displacement during the test process when it is actually used. The specific limiting pestle 813 further limits the position of the injection molding end for the air spring by adapting to the notch at the inner center point of the injection molding end for the air spring.

[0074] In addition, to ensure the stability of the air spring when assembling the injection molded end, refer to Figure 6 It can be seen that in the present invention, a load-bearing ring 802 for increasing the contact area with the injection-molded end of the air spring is fixed on the top of the pneumatic sleeve 801, an electronic pressure relief valve tube 812 for exhausting gas is installed on the top of the outside of the pneumatic sleeve 801, and a spiral tube 807 is fixed on the bottom of the pneumatic sleeve 801, and the spiral tube 807 is used to connect with the air supply part.

[0075] It should be noted that, in the present invention, the punching assembly 8, the stop assembly 9 and the extrusion assembly share a driving component 4, wherein reference Figure 1-Figure 8 It can be seen that the driving component 4 includes: an electronic control part, an air supply part and a rotating part. The rotating part is used to provide power for the operation of the limiting component 9, the air supply part is used to provide power for the operation of the stamping component 8, and the electronic control part is used to control the operation of the limiting component 9, the extrusion component and the stamping component 8.

[0076] In addition, when the driving component 4 is actually used, refer to Figure 1-Figure 5 It can be seen that the driving component 4 is installed in the placement seat 2, and a control panel 1 is provided at one end outside the placement seat 2. The control panel 1 and the electric control part in the driving component 4 are electrically connected. Notches are provided on both sides of the outside of the placement seat 2, and a heat dissipation net 3 is installed at the notch of the placement seat 2. A power supply connector 11 and a connecting connector 405 are respectively installed outside the end of the placement seat 2 away from the control panel 1. The power supply connector 11 is used to provide power to the driving component 4, and the connecting connector 405 is used to externally install an air pump.

[0077] It should be added that, in the present invention, the electric control part includes: a central control circuit board 407, which is installed on one side inside the placement seat 2 and is used to control the operation of the entire withstand voltage test device.

[0078] Specifically, the central control circuit board 407 is used to control the operation of the servo motor 409 , the air pump 406 and the electric hydraulic cylinder 7 .

[0079] It should be added that in the present invention, the gas supply part includes: a gas storage tank 404, which is installed on the other side of the placement seat 2, used to be connected to the connecting joint 405, and used to fill gas. The discharge end of the gas storage tank 404 is equipped with an air pump 406 fixed at the middle end of the placement seat 2, and the air pipe joint of the air pump 406 is installed at the gas notch 902 at the bottom end of the outside of the screw tube 901.

[0080] It should be added that, in the present invention, the rotating part includes: a servo motor 409 installed at the exact center of the bottom of the placement seat 2, and the rotating shaft of the servo motor 409 is fixed to the bottom of the screw-connecting tube 901.

[0081] In addition, reference Figure 5 It can also be known that storage screw tubes 408 are fixed around the inside of the placement seat 2, and a sealing cover 401 is installed on the top of the placement seat 2. The sealing cover 401 is used to seal the seat mouth of the placement seat 2. Rotatable positioning bolts 403 are inserted and installed around the top of the sealing cover 401, and the positioning bolts 403 and the storage screw tube 408 are adapted to each other.

[0082] It should be noted that, in the present invention, a connecting hole 402 is opened at the center point of the top of the sealing cover 401 , and the connecting hole 402 is matched with the screw-connecting tube 901 .

[0083] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. The pressure test device for injection molding end of air spring is characterized by: include: A limit assembly (9) for limiting the horizontal movement of the injection-molded end of the air spring during a pressure test; Extrusion assembly, used to limit the vertical upward movement of the injection molded end of the air spring during the pressure test; A stamping assembly (8) is used to provide vertical upward pressure to the bottom end of the injection-molded end of the air spring, wherein the stamping assembly (8), the limit assembly (9) and the extrusion assembly share a driving component (4); The driving component (4) comprises: an electric control part, an air supply part and a rotating part, the rotating part is used to provide power for the operation of the limit assembly (9), the air supply part is used to provide power for the operation of the punching assembly (8), and the electric control part is used to control the operation of the limit assembly (9), the extrusion assembly and the punching assembly (8); The stamping assembly (8) comprises: A pneumatic sleeve (801), the pneumatic sleeve (801) is connected to the air supply part, a carrying rod (810) is inserted and fixed inside the pneumatic sleeve (801), the interior of the carrying rod (810) is arranged in a solid state with two hollow middle sections at both ends, a plurality of flow guide notches (806) for gas flow are opened outside the end where the carrying rod (810) and the pneumatic sleeve (801) are in contact, a fan wheel (805) capable of rotating based on high-flow gas flow is installed outside the carrying rod (810), the fan wheel (805) and the pneumatic sleeve (801) are adapted, and an extrusion plate (803) inserted outside the carrying rod (810) is assembled and installed on the top of the fan wheel (805); A plurality of connecting pipes (804) for connecting gas are fixed between the top and bottom ends of the air pressure sleeve (801), and the top of the air pressure sleeve (801) is used to place an injection molding end cap for an air spring; When the punching assembly (8) is in operation, high-flow gas drives the fan wheel (805) to rotate and push the extrusion plate (803) to move, thereby increasing the gas pressure that enters the top of the extrusion plate (803) along the connecting pipe (804) and acts on the bottom end of the injection molding end for the air spring.

2. The pressure-resistant testing device for injection-molded end of air spring according to claim 1, characterized in that: Limiting rings (814) are respectively fixed at both ends of the outside of the carrying rod (810), and the two limiting rings (814) are respectively placed at the middle section of the outside of the carrying rod (810), and a threaded section (808) is provided on the outside of the carrying rod (810) between the two limiting rings (814), and the fan wheel (805) is threadedly connected to the outside of the carrying rod (810) based on the threaded section (808).

3. The pressure-resistant testing device for injection-molded end of air spring according to claim 1, characterized in that: A bearing ring (802) for increasing the contact area with the injection-molded end of the air spring is fixed on the top of the air pressure sleeve (801), an electronic pressure relief valve tube (812) for exhausting gas is installed on the top of the outside of the air pressure sleeve (801), and a spiral tube (807) is fixed on the bottom of the air pressure sleeve (801), and the spiral tube (807) is used to communicate with the air supply part.

4. The pressure-resistant testing device for injection-molded end of air spring according to claim 3, characterized in that: The limiting component (9) comprises: A triangular plate (903), a screw connection tube (901) being fixed at the inner center point of the triangular plate (903), the screw connection tube (901) being fixed to the rotating part, the inner part of the screw connection tube (901) being adapted to the outer part of the screw tube (807), a gas notch (902) being provided at the bottom end of the outer part of the screw connection tube (901), the gas notch (902) being used for connecting to the gas supply part; The three corners of the top surface of the triangular plate (903) are rotatably connected to folding arms (904), the top of the outer end of the screw connection tube (901) is rotatably connected to a positioning tripod (905), and movable notches (909) are respectively provided at the three corners of the top of the positioning tripod (905). An assembly rod (908) passing through the movable notch (909) is installed on the top of the folding arm (904). When the triangular plate (903) rotates, the assembly rod (908) moves along the movable notch (909) in the positioning tripod (905); The top of the assembly rod (908) is threadedly mounted with an assembly arc arm (906), and the arc surface of the assembly arc arm (906) moves toward the arc edge of the outer surface of the injection-molded end head for the air spring when the triangular plate (903) rotates.

5. The pressure-resistant testing device for injection-molded end of air spring according to claim 4, characterized in that: The driving component (4) is installed in the placement seat (2); a control panel (1) is provided at one end outside the placement seat (2); the control panel (1) and the electric control part in the driving component (4) are electrically connected; notches are provided on both sides outside the placement seat (2); a heat dissipation net (3) is installed at the notches of the placement seat (2); a power supply connector (11) and a connecting connector (405) are respectively installed outside the end of the placement seat (2) away from the control panel (1); the power supply connector (11) is used to provide electric energy to the driving component (4); and the connecting connector (405) is used to externally install an air pump.

6. The pressure-resistant testing device for injection-molded end of air spring according to claim 5, characterized in that: The electronic control part includes: A central control circuit board (407), mounted on one side of the placement seat (2), and used to control the operation of the entire withstand voltage test device; The gas supply part comprises: A gas storage tank (404) is installed on the other side of the placement seat (2) and is connected to the connecting joint (405) for filling gas. A gas delivery pump (406) fixed to the middle end of the placement seat (2) is installed at the discharge end of the gas storage tank (404). The gas pipe joint of the gas delivery pump (406) is installed at the gas notch (902) at the bottom end of the outside of the screw connection tube (901). The rotating part comprises: The servo motor (409) is installed at the exact center of the bottom of the placement seat (2), and the rotating shaft of the servo motor (409) is fixed to the bottom of the screw connection cylinder (901).

7. The pressure-resistant testing device for injection-molded end of air spring according to claim 5, characterized in that: The receiving screw tubes (408) are fixed on the four sides of the interior of the placement seat (2), and a sealing cover (401) is installed on the top of the placement seat (2). The sealing cover (401) is used to seal the seat opening of the placement seat (2). Rotatable positioning bolts (403) are inserted and installed on the four sides of the top of the sealing cover (401), and the positioning bolts (403) are compatible with the receiving screw tubes (408).

8. The pressure-resistant testing device for injection-molded end of air spring according to claim 7, characterized in that: A communication hole (402) is provided at the center point of the top of the sealing cover (401), and the communication hole (402) is adapted to the screw connection cylinder (901).

9. The pressure-resistant testing device for injection-molded end of air spring according to claim 1, characterized in that: An inserting groove (811) is provided at one end of the carrying rod (810) away from the guide notch (806), and a limiting pestle (813) is installed in the inserting groove (811). The limiting pestle (813) is adapted to the notch at the center point inside the injection-molded end of the air spring.

10. The pressure-resistant testing device for injection-molded tips of air springs according to claim 1, characterized in that: The extrusion assembly comprises: A gantry (5), an electric hydraulic cylinder (7) being fixed at a folded edge position at the top of the gantry (5), the electric hydraulic cylinder (7) being electrically connected to the electric control part; The telescopic end of the electric hydraulic cylinder (7) is provided with an extrusion block (10), which is used to limit the vertical upward movement of the injection molded end of the air spring during a pressure resistance test. When the electric hydraulic cylinder (7) drives the extrusion block (10) to move downward, the extrusion block (10) applies pressure to the injection molded end of the air spring to simulate the pressure conditions in actual use.

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