Automobile piston rod detection mechanism

Abstract

The present application relates to the technical fields of piston rod detection, more specifically, the present application relates to a kind of automobile piston rod detection mechanism, including the following structure: air tightness detection equipment;Bearing is installed on air tightness detection equipment, for fixed oil cylinder, characterized in that;Bearing includes two guide rails, bearing plate is slidably arranged on guide rail, vertical cylinder is penetrated through bearing plate.The present application in the process of use, it is not necessary for staff to frequently place and replace outlet nozzle, only need staff to connect head on oil cylinder is inserted into vertical cylinder, when air tightness detection equipment works, it can make the connect head on oil cylinder fully inserted into vertical cylinder, then under the assistance of gas source, first sealing element and second sealing element, thereby realizing the plugging of the connect head of oil cylinder, reduce the replacement work of staff, also avoid gas leakage, further guarantee the accuracy of device detection.

Description

Technical Field

[0001] This invention relates to the field of piston rod testing technology, and more specifically, to an automotive piston rod testing mechanism. Background Technology

[0002] Piston rods are used in automotive shock absorbers to cushion road impacts through reciprocating motion, thereby improving vehicle comfort and handling. In shock absorbers, piston rods are mainly used in conjunction with components such as pistons, cylinders, hydraulic fluid, springs, and seals.

[0003] In the process of inspecting automotive piston rods, the airtightness test of the piston rod and cylinder is particularly important. Existing airtightness testing equipment generally requires operators to place the cylinder on the testing platform and then start the equipment for testing. During the testing process, operators need to place different air outlets according to different models of automotive piston rods and cylinders. However, the air outlets are only placed at the output end of the airtightness testing equipment. Therefore, operators need to frequently change the air outlets during the testing process, which increases the workload of the operators. At the same time, during the placement process, it is easy for the air outlet to be loose between the air outlet and the output end of the airtightness testing equipment, resulting in gas leakage and further leading to inaccurate airtightness testing.

[0004] Therefore, we propose an automotive piston rod detection mechanism to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide an automotive piston rod detection mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automotive piston rod testing mechanism, comprising the following structures: an airtightness testing device; a support member installed on the airtightness testing device for fixing a hydraulic cylinder, characterized in that: the support member includes two guide rails, a support plate slidably disposed on the guide rails, and a vertical cylinder penetrating the support plate; an air source component disposed inside the vertical cylinder, including an insertion tube fixed to the bottom of the vertical cylinder; a first sealing member sleeved on the insertion tube for sealing the inner side of the hydraulic cylinder connector; a second sealing member disposed on the side wall of the vertical cylinder for sealing the outer side of the hydraulic cylinder connector; and a protective member disposed at the upper end of the vertical cylinder for sealing the gap between the hydraulic cylinder and the vertical cylinder.

[0007] In a preferred embodiment, the support component includes two guide rails disposed on the airtightness testing equipment, two matching support plates disposed on the two guide rails, a vertical cylinder passing through the support plate, an air inlet pipe threaded onto the vertical cylinder, an air inlet one-way pipe passing through the side wall of the vertical cylinder, and a pressure relief pipe passing through the vertical cylinder.

[0008] In a preferred embodiment, the air source component includes an insert tube integrally installed at the bottom of the vertical cylinder. A piston plate is provided in the vertical cylinder, the piston plate is sleeved on the insert tube, and the piston plate and the insert tube are slidably sealed. A sealing element is connected to the piston plate, and the connecting pipe and the lower end are in contact with the sealing element. A spring connected to the bottom of the vertical cylinder is fixedly connected to the lower end of the piston plate. The lower part of the piston plate and the vertical cylinder form an air chamber.

[0009] In a preferred embodiment, the sealing component includes a rigid rubber plate fixedly connected to a piston plate, a sealing cover bonded to the upper end of the rigid rubber plate, water filling the sealing cover and the rigid rubber plate, and a soft rubber pad fixedly connected to the upper end of the sealing cover, the soft rubber pad having multiple vent holes.

[0010] In a preferred embodiment, the first sealing element includes a first receiving ring sleeved on the insertion tube. Notably, the first receiving ring is located above the piston plate. An air bladder ring is provided in the first receiving ring. Two soft rubber rings are fixedly connected to the side wall of the air bladder ring. A sealing element is fixedly connected to each of the two soft rubber rings. Two delivery tubes communicating with the air bladder ring are provided through the first receiving ring. The lower ends of the two delivery tubes pass through the side wall of the piston plate and extend into the air chamber.

[0011] In a preferred embodiment, the closure includes multiple soft rubber blocks bonded to the sidewall of a soft rubber ring, each of the multiple soft rubber blocks having a through-hole metal reinforcing strip, each of the multiple soft rubber blocks having a metal friction plate fixedly connected to the sidewall of each of the multiple soft rubber blocks, and each of the multiple soft rubber blocks having a plurality of thin rubber pads fixedly connected to the sidewall of each of the multiple soft rubber blocks.

[0012] In a preferred embodiment, the conveying component includes a placement groove disposed on the inner side wall of a vertical cylinder. The vertical cylinder has two symmetrical conveying channels that are connected to the placement groove. The conveying channels are filled with water. The side walls of the two conveying channels are provided with conveying holes. The two conveying channels are connected to an air chamber through the conveying holes. Each of the two conveying channels is provided with a matching piston block. The placement groove is provided with a matching second receiving ring.

[0013] In a preferred embodiment, the second sealing element includes a water bladder ring disposed on the inner sidewall of the second receiving ring. The water bladder ring is connected to two connecting pipes and two conveying channels. Multiple sets of rubber rings are fixedly connected to the sidewall of the water bladder ring, and adhesive patches are fixedly connected to the sidewall of each set of rubber rings. Multiple symmetrical limiting plates are fixedly connected to the sidewall of the second receiving ring, and smooth metal sheets that contact the water bladder ring are fixedly connected to the end faces of the multiple limiting plates.

[0014] In a preferred embodiment, the protective component includes a rigid rubber ring fixedly connected to the upper end face of the vertical pipe, a connecting plastic ring fixedly connected to the upper end face of the rigid rubber ring, a rubber skirt fixedly connected to the upper end face of the connecting plastic ring, a plurality of metal elastic strips provided at the connection between the connecting plastic ring and the rubber skirt, and a plurality of sealing grooves provided on the end face of the rubber skirt.

[0015] The technical effects and advantages of this invention are as follows:

[0016] During use, this invention eliminates the need for frequent placement and replacement of the air outlet. Operators simply insert the connector on the hydraulic cylinder into the vertical cylinder. When the airtightness testing equipment is operational, the connector is fully inserted into the vertical cylinder. With the assistance of the air source component, the first sealing component, and the second sealing component, the connector on the hydraulic cylinder is sealed, reducing the need for manual replacements and preventing gas leakage, thus further ensuring the accuracy of the device's testing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of a partial connection structure between the hydraulic cylinder and the load-bearing component in this invention;

[0019] Figure 3 This is a schematic diagram showing the exploded connection structure of the hydraulic cylinder and the bearing component in this invention;

[0020] Figure 4 This is a schematic diagram of the connection structure of the bearing component in this invention;

[0021] Figure 5 for Figure 4 A schematic diagram of the first partial sectional view of the connection structure;

[0022] Figure 6 for Figure 4 A schematic diagram of the second partial sectional view of the connection structure;

[0023] Figure 7 This is a schematic diagram of a partial connection structure of the sealing element in this invention;

[0024] Figure 8 This is a schematic diagram of a partial connection structure of the first sealing element in this invention;

[0025] Figure 9 This is a schematic diagram of a partial connection structure of the closure component in this invention;

[0026] Figure 10 for Figure 4 A schematic diagram of the third partial sectional view of the connection structure;

[0027] Figure 11 This is a schematic diagram of a partial connection structure of the second sealing element in this invention;

[0028] Figure 12 This is a schematic diagram of a partial connection structure between the vertical cylinder and the protective component in this invention.

[0029] The attached figure is labeled: 1. Air tightness testing equipment;

[0030] 2. Bearing component, 21. Guide rail, 22. Bearing plate, 23. Vertical cylinder, 24. Air intake pipe, 25. Air intake one-way pipe, 26. Pressure relief pipe;

[0031] 3 hydraulic cylinders, 4 connectors;

[0032] 5. Air source component, 51. Insertion tube, 52. Piston plate, 53. Sealing component, 54. Spring, 55. Air chamber;

[0033] 531 Hard rubber sheet, 532 Sealing cover, 533 Soft rubber pad, 534 Vent hole;

[0034] 6 First sealing element, 61 First receiving ring, 62 Airbag ring, 63 Soft rubber ring, 64 Sealing element, 65 Conveying pipe;

[0035] 641 Soft rubber block, 642 Metal reinforcing ribs, 643 Metal friction plate, 644 Fine rubber pad;

[0036] 7 Conveying component, 71 Placement slot, 72 Conveying channel, 73 Conveying hole, 74 Piston block, 75 Second receiving ring;

[0037] 8 Second sealing element, 81 Water bladder ring, 82 Rubber ring, 83 Adhesive patch, 84 Limiting plate, 85 Smooth metal sheet;

[0038] 9 Protective components, 91 Hard rubber ring, 92 Connecting plastic ring, 93 Rubber skirt, 94 Metal elastic strip, 95 Sealing groove. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Reference Figure 1An automotive piston rod testing mechanism includes an airtightness testing device 1, a hydraulic cylinder 3, and two connectors 4 respectively mounted on the hydraulic cylinder 3. Notably, the airtightness testing device 1 includes the following components: forming a sealed space: a test fixture (sealing element, clamping mechanism, cavity); providing and controlling pressure: a pressure source, a pressure regulating system, and valves; accurately sensing the state: a high-precision pressure sensor and a flow sensor (optional); command and decision-making: a control system (PLC / industrial computer); human-machine communication: an HMI (touchscreen / display); and safety assurance: safety protection devices. It is important to note that the airtightness testing device 1 is prior art and will not be discussed further here. Simultaneously, the piston rod is mounted on the hydraulic cylinder 3 for airtightness testing to ensure the quality of the piston rod. Both the hydraulic cylinder 3 and the connectors 4 are prior art in this technical field and will not be discussed further here.

[0041] Reference Figure 1 , Figure 2 and Figure 3 The airtightness testing equipment 1 is equipped with a support component 2 capable of supporting the hydraulic cylinder 3. The support component 2 includes two guide rails 21 mounted on the airtightness testing equipment 1, and two matching support plates 22 mounted on the two guide rails 2. It is particularly noteworthy that the specific connection structure between the guide rails 21 and the support plates 22 is as follows: A guide block matching the guide rail is integrally formed on the support plate 22, and the guide block allows the support plate 22 to move on the guide rails 21. Simultaneously, two sets of fixing plates are mounted on the support plate 22, and each set of fixing plates is threadedly connected to an adjusting knob. When the operator rotates the adjusting knob, the lead screw on the adjusting knob can move downwards accordingly, further... The device allows the lead screw and guide rail 21 to contact each other, further securing the support plate 22. Additionally, an electric guide rail and guide block can be installed on the airtightness testing device 1. The guide block can be connected to one of the support plates 22, facilitating the movement of one of the support plates 22 by the operator. This allows the device to adapt to different models of hydraulic cylinders 3. Furthermore, the airtightness testing device 1 has a strip-shaped opening located below the two guide rails 21, ensuring that the air inlet pipe 24 on the support plate 22 is not obstructed, further guaranteeing that gas can enter the vertical cylinder 23, thus ensuring the normal operation of the device.

[0042] Reference Figure 3 , Figure 4 and Figure 5A vertical cylinder 23 is threaded through the support plate 22, and an air inlet pipe 24 is threaded onto the vertical cylinder 23. Notably, the air inlet pipe 24 is connected to an external air source, further ensuring that gas enters the vertical cylinder 23. An air inlet one-way pipe 25 is threaded through the side wall of the vertical cylinder 23. The air inlet one-way pipe 25 includes a pipe and a one-way valve, so that external gas can enter the vertical cylinder 23 through the pipe and the one-way valve, and the gas in the vertical cylinder 23 will not leak out. At the same time, a pressure relief pipe 26 is threaded through the vertical cylinder 23, which also includes a pipe and a pressure relief valve. When the air pressure inside the vertical cylinder 23 is relatively high, the pressure relief valve can discharge the gas in the vertical cylinder 23, further enabling the piston plate 52 to move normally. This allows the device to adapt to different models of hydraulic cylinders 3, thereby ensuring the normal use of the device.

[0043] Reference Figure 5 and Figure 6 The gas source component 5 includes an integrated tube 51 installed at the bottom of the vertical cylinder 23. When external gas enters or exits the vertical cylinder 23, the gas first flows into the tube 51 and then flows to the outside. At the same time, a piston plate 52 is provided in the vertical cylinder 23. The piston plate 52 is sleeved on the tube 51, and the piston plate 52 and the tube 51 are slidably sealed. A sealing element 53 is connected to the piston plate 52, and the connecting pipe 4 and the lower end are in contact with the sealing element 53. A spring 54 connected to the bottom of the vertical cylinder 23 is fixedly connected to the lower end of the piston plate 52. The lower part of the piston plate 52 and the vertical cylinder 23 form a gas chamber 55.

[0044] Reference Figure 6 and Figure 7 The sealing component 53 includes a rigid rubber plate 531 fixedly connected to the piston plate 52. A sealing cover 532 is bonded to the upper end of the rigid rubber plate 531. The sealing cover 532 and the rigid rubber plate 531 are filled with water, and the water volume is 70%. It is worth noting that the sealing cover 532 is bonded to the rigid rubber plate 531 with resin adhesive. A soft rubber pad 533 is fixedly connected to the upper end of the sealing cover 532. The soft rubber pad 533 is provided with multiple vent holes 534. It is worth noting that the multiple vent holes 534 are all located in the soft rubber pad 533, and the multiple vent holes are all connected through an air supply channel. This allows the gas in the soft rubber pad 533 to be discharged with the help of the vent holes when the soft rubber pad 533 is compressed, which makes the connecting pipe 4 fit more tightly.

[0045] Reference Figure 6 and Figure 8The first sealing element 6 includes a first receiving ring 61 sleeved on the insertion tube 51. Notably, the first receiving ring 61 is located above the piston plate 52. An airbag ring 62 is provided in the first receiving ring 61. Notably, the airbag ring 62 is a plastic film bent into a U-shape, and the other end of the U-shape is attached to the inner side wall of the first receiving ring 61. Two soft rubber rings 63 are fixedly connected to the side wall of the airbag ring 62. Notably, the two soft rubber rings 63 are made of relatively thin and highly elastic rubber material. A sealing element 64 is fixedly connected to each of the two soft rubber rings 63. Two delivery tubes 65 are provided through the first receiving ring 61 and are connected to the airbag ring 62. The lower ends of the two delivery tubes 65 pass through the side wall of the piston plate 52 and extend into the air chamber 55.

[0046] Reference Figure 8 and Figure 9 The sealing component 64 includes multiple soft rubber blocks 641 bonded to the sidewall of the soft rubber ring 63. Notably, the multiple soft rubber blocks 641 are divided into two groups, and the two groups of soft rubber blocks 641 are arranged vertically and alternately. This effectively prevents gas leakage. At the same time, each of the multiple soft rubber blocks 641 is provided with a metal reinforcing rib 642. Metal friction plates 643 are fixedly connected to the sidewall of each of the multiple soft rubber blocks 641. Notably, when the metal friction plates 643 come into contact with the connector 4, the metal friction plates 643 can increase the stability of the connector 4, and further increase the stability of the hydraulic cylinder 3. At the same time, multiple thin rubber pads 644 are fixedly connected to the sidewall of each of the multiple soft rubber blocks 641. Notably, the thin rubber pads 644 are relatively thin, which can reduce the gap between two soft rubber blocks 641 and further increase the sealing performance of the device.

[0047] Reference Figure 10 and Figure 11 The conveying component 7 includes a placement groove 71 disposed on the inner side wall of the vertical cylinder 23. The vertical cylinder 23 is provided with two symmetrical conveying channels 72 that are connected to the placement groove 71. The conveying channels 72 are filled with water. The side walls of the two conveying channels 72 are provided with conveying holes 73. The two conveying channels 72 are connected to the air chamber 55 through the conveying holes 73. The two conveying channels 72 are provided with matching piston blocks 74. The placement groove 71 is provided with matching second receiving rings 75.

[0048] Reference Figure 10 and Figure 11The second sealing element 8 includes a water bladder ring 81 disposed on the inner side wall of the second receiving ring 75. It is worth noting that the structure of the water bladder ring 81 is the same as that of the air bladder ring 62, as described above, and will not be elaborated further here. The water bladder ring 81 is connected to two connecting pipes and two conveying channels 72, which ensures that the water source in the conveying channel 72 enters the water bladder ring 81 through the connecting pipes, thereby ensuring the normal use of the water bladder ring 81. Multiple sets of rubber rings 82 are fixedly connected to the side wall of the water bladder ring 81, and each set of rubber rings 82 consists of 4 rubber rings. The multiple sets of rubber rings 82 are arranged in a ring array on the side wall of the water bladder ring 81, and the multiple sets of rubber rings 82 are staggered. Adhesive patches 83 are fixedly connected to the side wall of each set of rubber rings 82. Multiple symmetrical limiting plates 84 are fixedly connected to the side wall of the second receiving ring 75, and smooth metal plates 85 that contact the water bladder ring 81 are fixedly connected to the end face of the multiple limiting plates 84.

[0049] Reference Figure 10 and Figure 12 The protective component 9 includes a rigid rubber ring 91 fixedly connected to the upper end face of the vertical pipe 23. A connecting plastic ring 92 is fixedly connected to the upper end face of the rigid rubber ring 91. A rubber skirt 93 is fixedly connected to the upper end face of the connecting plastic ring 92. Multiple metal elastic strips 94 are provided at the connection between the connecting plastic ring 92 and the rubber skirt 93. Multiple sealing grooves 95 are provided on the end face of the rubber skirt 93.

[0050] When staff need to use this device, please refer to the instruction manual attached. Figure 1 Included with instruction manual Figure 2 The operator can move one of the support plates 22 to adapt the device to different models of hydraulic cylinders 3. When the operator turns the adjustment knob, the lead screw on the adjustment knob moves downward, allowing the lead screw to contact the guide rail 21 and further fixing the support plate 22. Refer to the instruction manual attached. Figure 2 Included with instruction manual Figure 3 First, the operator can insert the connector 4 on the cylinder 3 to be tested into the vertical cylinder 23. Then, the operator starts the hydraulic cylinder on the bearing plate 22. The output end of the hydraulic cylinder is equipped with a rubber head. When the hydraulic cylinder is working, the rubber head can press the cylinder 3, which can further fix the cylinder 3. It is important to note that after the cylinder 3 is fixed, the operator can press the start button to start the device to test the cylinder 3. After the test is completed, the operator can remove the cylinder 3 and continue to test the next cylinder 3.

[0051] More specifically, when connector 4 moves downward under pressure from the hydraulic cylinder, connector 4 comes into contact with soft rubber pad 533. At this time, soft rubber pad 533 is compressed, and the vent 534 allows the gas in soft rubber pad 533 to be quickly discharged, further allowing soft rubber pad 533 to fit more closely to connector 4, further preventing gas from escaping from the connection between connector 4 and soft rubber pad 533. Since the sealing cover 532 is filled with water, soft rubber pad 533 fits more closely to connector 4, further ensuring the sealing performance of connector 4 and sealing component, thereby preventing gas leakage.

[0052] As connector 4 continues to move downwards, piston plate 52 is also affected and moves downwards, allowing gas in air chamber 55 to enter delivery pipe 65. Once in delivery pipe 65, the gas enters airbag ring 62, causing it to expand. This allows the soft rubber block 641 on soft rubber ring 63 to contact the inner wall of connector 4. Notably, the metal reinforcing rib 642 increases the stability of the soft rubber block 641. Qualitatively, the metal friction plate 643 increases the friction between the connector 4 and the soft rubber block 641, further ensuring the stability of the connector 4. It is particularly noteworthy that the two sets of soft rubber blocks 641 are staggered vertically, effectively preventing gas leakage. The narrow rubber pad 644 further enhances the sealing effect between adjacent soft rubber blocks 641, further preventing gas leakage. This also allows the device to adapt to connectors 4 of different diameters, further ensuring the normal operation of the device.

[0053] Then, when the piston plate 52 moves, the gas in the gas chamber 55 enters the conveying channel 72 through the conveying hole 73, which causes the piston block 74 to move accordingly. When the piston block 74 moves, water can enter the water bladder ring 81, allowing the adhesive tape 83 on the rubber ring 82 to adhere to the outer wall of the connector 4. It is particularly noteworthy that the adhesive tape 83 can be made of a rubber material with a certain degree of stickiness, which can further effectively prevent gas leakage. The setting of the limiting plate 84 and the smooth metal plate 85 not only supports the water bladder ring 81, but also limits the water bladder ring 81, further ensuring the normal use of the water bladder ring 81. At the same time, it can also allow the second sealing element 8 to adhere to the connector 4, further preventing gas leakage, thereby ensuring the accuracy of the detection.

[0054] Finally, when the hydraulic cylinder 3 presses down on the vertical cylinder 23, the rubber skirt 93, with the assistance of the metal elastic strip 94, can effectively fit at the connection between the hydraulic cylinder 3 and the vertical cylinder 23, further preventing gas leakage. The multiple sealing grooves 95 can effectively prevent gas leakage, further ensuring the airtightness of the device and indirectly improving the accuracy of the device's detection.

[0055] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0056] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0057] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automotive piston rod testing mechanism, comprising an air tightness testing device (1), a carrier (2), an air source (5), a first seal (6), a conveying component (7), a second seal (8), and a protective component (9); The support component (2) is installed on the airtightness testing equipment (1), and the support component (2) is used to fix the oil cylinder (3); Its features are, The support member (2) includes two guide rails (21), a support plate (22) slidably disposed on the guide rails (21), and a vertical cylinder (23) penetrating the support plate (22). The air source component (5) is located inside the vertical cylinder (23), and the air source component (5) includes an insertion tube (51) fixed to the bottom of the vertical cylinder (23). The first sealing element (6) is sleeved on the insertion tube (51) to seal the inside of the cylinder connector (4); The second seal (8) is provided on the side wall of the vertical cylinder (23) and is used to seal the outside of the cylinder connector (4); The protective component (9) is located at the upper end of the vertical cylinder (23) and is used to seal the gap between the oil cylinder (3) and the vertical cylinder (23); The support component (2) includes two guide rails (21) set on the air tightness testing equipment (1), two matching support plates (22) are provided on the two guide rails (21), a vertical cylinder (23) is provided through the support plate (22), an air inlet pipe (24) is threaded on the vertical cylinder (23), an air inlet one-way pipe (25) is provided through the side wall of the vertical cylinder (23), and a pressure relief pipe (26) is provided through the vertical cylinder (23). The gas source component (5) includes an insert tube (51) integrally installed at the bottom of the vertical cylinder (23). A piston plate (52) is provided in the vertical cylinder (23). The piston plate (52) is sleeved on the insert tube (51), and the piston plate (52) and the insert tube (51) are slidably sealed. A sealing component (53) is connected on the piston plate (52), and the lower end of the connector (4) is in contact with the sealing component (53). A spring (54) connected to the bottom of the vertical cylinder (23) is fixedly connected to the lower end of the piston plate (52). The lower part of the piston plate (52) and the vertical cylinder (23) form an air chamber (55). The first sealing element (6) includes a first receiving ring (61) sleeved on the insertion tube (51). The first receiving ring (61) is located above the piston plate (52). An airbag ring (62) is provided in the first receiving ring (61). Two soft rubber rings (63) are fixedly connected to the side wall of the airbag ring (62). A sealing element (64) is fixedly connected to each of the two soft rubber rings (63). Two delivery pipes (65) that communicate with the airbag ring (62) are provided through the first receiving ring (61). The lower ends of the two delivery pipes (65) pass through the side wall of the piston plate (52) and extend into the air chamber (55). The conveying component (7) includes a placement groove (71) set on the inner side wall of the vertical cylinder (23). The vertical cylinder (23) is provided with two symmetrical conveying channels (72) connected to the placement groove (71). The conveying channels (72) are filled with water. The side walls of the two conveying channels (72) are provided with conveying holes (73). The two conveying channels (72) are connected to the air chamber (55) through the conveying holes (73). The two conveying channels (72) are provided with matching piston blocks (74). The placement groove (71) is provided with matching second receiving rings (75). The second sealing element (8) includes a water bladder ring (81) disposed on the inner side wall of the second storage ring (75). The water bladder ring (81) is connected to two connecting pipes and two conveying channels (72). Multiple sets of rubber rings (82) are fixedly connected to the side wall of the water bladder ring (81). Adhesive patches (83) are fixedly connected to the side wall of each set of rubber rings (82). Multiple symmetrical limiting plates (84) are fixedly connected to the side wall of the second storage ring (75). Smooth metal sheets (85) that contact the water bladder ring (81) are fixedly connected to the end face of the multiple limiting plates (84). The piston rod is installed on the oil cylinder (3) for sealing test.

2. The automotive piston rod detection mechanism according to claim 1, characterized in that: The sealing component (53) includes a hard rubber plate (531) fixedly connected to the piston plate (52). A sealing cover (532) is bonded to the upper end of the hard rubber plate (531). Water is filled in the sealing cover (532) and the hard rubber plate (531). A soft rubber pad (533) is fixedly connected to the upper end of the sealing cover (532). The soft rubber pad (533) is provided with multiple vent holes (534).

3. The automotive piston rod detection mechanism according to claim 1, characterized in that: The closure (64) includes multiple soft rubber blocks (641) bonded to the side wall of the soft rubber ring (63), each of the multiple soft rubber blocks (641) having a metal reinforcing rib (642) running through it, each of the multiple soft rubber blocks (641) having a metal friction plate (643) fixedly connected to the side wall of each of the multiple soft rubber blocks (641), and each of the multiple soft rubber blocks (641) having a multiple thin rubber pad (644) fixedly connected to the side wall of each of the multiple soft rubber blocks (641).

4. The automotive piston rod detection mechanism according to claim 1, characterized in that: The protective component (9) includes a rigid rubber ring (91) fixedly connected to the upper end face of the vertical cylinder (23). A connecting plastic ring (92) is fixedly connected to the upper end face of the rigid rubber ring (91). A rubber skirt (93) is fixedly connected to the upper end face of the connecting plastic ring (92). Multiple metal elastic strips (94) are provided at the connection between the connecting plastic ring (92) and the rubber skirt (93). Multiple sealing grooves (95) are provided on the end face of the rubber skirt (93).

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