Airtightness detection device for nitrogen spring processing

Abstract

The utility model relates to nitrogen spring detection technical field, and disclose a nitrogen spring processing air tightness detection device, including water tank, the top of water tank is provided with the square mouth, the top outer wall of water tank and located square mouth both sides position fixedly connected with U -shaped support, the top outer wall of U -shaped support is fixedly connected with multiple electric push rod, multiple electric push rod output passes through the top inner wall fixedly connected with the connecting frame of U -shaped support, the bottom fixedly connected with cross -shaped frame of connecting frame, the lower surface fixedly connected with multiple round pipes of cross -shaped frame, multiple round pipe in all slidingly connected with round bar. The utility model discloses the multiple electric push rod that is equipped, can promote the nitrogen spring of test to the device above after the detection is completed, so in the process of a large number of test pieces to test need not to carry out the operation of putting in and taking out water for many times, save a lot of time, effectively improve the efficiency of test.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen spring testing technology, and more specifically to an airtightness testing device for nitrogen spring processing. Background Technology

[0002] Nitrogen springs are precision elastic elements that use high-pressure nitrogen as an energy storage medium. They are widely used in automobile manufacturing, industrial machinery, aerospace and other fields to provide stable and controllable buffering or supporting forces. Their core performance indicators include sealing performance, pressure resistance and life reliability. Among them, airtightness directly determines the long-term working stability and safety of the spring.

[0003] A search revealed Chinese patent CN218973744U, which discloses an airtightness testing device for nitrogen spring processing. This device is not only time-saving and labor-saving, but also capable of comprehensively testing the airtightness of the entire nitrogen spring, ensuring the testing effect. Moreover, the overall structure is simple and easy to use. However, since the test is conducted in water, the water inside the device needs to be drained before replacement after the test. If a large number of tests are conducted, it will consume a lot of time and reduce the efficiency of the test. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an airtightness testing device for nitrogen spring processing, so as to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: an airtightness testing device for nitrogen spring processing, comprising a water tank, the top of which has a square opening, and a U-shaped frame fixedly connected to the top outer wall of the water tank on both sides of the square opening. Multiple electric push rods are fixedly connected to the top outer wall of the U-shaped frame, and a connecting frame is fixedly connected to the output end of each electric push rod through the top inner wall of the U-shaped frame. A cross-shaped frame is fixedly connected to the bottom end of the connecting frame, and multiple round tubes are fixedly connected to the lower surface of the cross-shaped frame. Round rods are slidably connected inside each of the round tubes, and the round rods can rotate within the round tubes. Two round rods on the same side have fixing plates at their bottom ends via quick-release components. Two symmetrical connecting rods are fixedly connected between the two fixing plates. A fixing clamp is fixedly connected to one side of one of the fixing plates, and sliding clamps are slidably connected to the two connecting rods.

[0006] As a further embodiment of this utility model, a threaded rod is fixedly connected to one side of the sliding clamping block, and one end of the threaded rod passes through one side of one of the fixed plates and is threadedly connected to it. V-shaped platforms are provided on the opposite sides of the sliding clamping block and the fixed clamping block.

[0007] As a further embodiment of this utility model, the quick-release assembly includes two sets of annular blocks fixedly connected to both sides of two fixing plates, with two blocks in each set. Each set of annular blocks has annular grooves and two symmetrical clearance grooves that cooperate with the annular grooves. The bottom ends of the multiple round rods are fixedly connected to annular blocks, and each set of annular blocks has two symmetrical locking blocks that cooperate with the clearance grooves.

[0008] As a further embodiment of this utility model, springs are provided between the top inner wall of the multiple sets of circular tubes and the top end of the circular rod.

[0009] As a further embodiment of this utility model, multiple positioning rods are fixedly connected to the lower surfaces of both fixing plates, a support base is fixedly connected to the bottom inner wall of the water tank, and two sets of positioning recesses that cooperate with the positioning rods are fixedly connected to the upper surface of the support base.

[0010] As a further embodiment of this utility model, the U-shaped frame has sliding openings on both sides, and I-shaped blocks are slidably connected in both sliding openings. The opposite sides of the two I-shaped blocks are respectively fixed to the two ends of the connecting frame.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model, through the provision of multi-section electric push rods, can lift the nitrogen spring to the top of the device after the test is completed. In this way, it is not necessary to perform multiple water filling and emptying operations during the testing of a large number of test pieces, saving a lot of time and effectively increasing the testing efficiency.

[0013] 2. This utility model, through the positioning recess provided on the support base and the positioning rod provided at the bottom of the fixing plate, can position the device after it is inserted into the water, thus avoiding tilting during the test and affecting the accuracy of the test.

[0014] 3. This utility model can easily fix nitrogen springs of different sizes for testing by means of V-shaped grooves provided on the fixed clamping block and the sliding clamping block, thereby increasing the applicability of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front three-dimensional structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the water tank of this utility model.

[0017] Figure 3 This utility model Figure 2 A partially enlarged structural diagram.

[0018] Figure 4This utility model Figure 3 A schematic diagram of a localized explosion structure.

[0019] Figure 5 This utility model Figure 2 A magnified structural diagram of part A.

[0020] The attached diagram is labeled as follows: 1. Water tank; 2. Square opening; 3. U-shaped frame; 4. Multi-section electric push rod; 5. Connecting frame; 6. Cross-shaped frame; 7. Round tube; 8. Round rod; 9. Fixing plate; 10. Connecting rod; 11. Fixing clamp; 12. Sliding clamp; 13. Threaded rod; 14. Support base; 15. Positioning recess; 16. Positioning rod; 17. Circular block; 18. Circular groove; 19. Alternating groove; 20. Annular block; 21. Locking block; 22. Sliding opening; 23. I-shaped block. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Reference Figures 1-5 This utility model provides an airtightness testing device for nitrogen spring processing, including a water tank 1. A square opening 2 is provided at the top of the water tank 1. A U-shaped frame 3 is bolted to the outer wall of the top of the water tank 1, located on both sides of the square opening 2. Multiple electric push rods 4 are bolted to the outer wall of the top of the U-shaped frame 3. The output ends of the electric push rods 4 pass through the inner wall of the top of the U-shaped frame 3 and are bolted to a connecting frame 5. A cross-shaped frame 6 is bolted to the bottom end of the connecting frame 5. Multiple round tubes 7 are bolted to the lower surface of the cross-shaped frame 6. Round rods 8 are slidably connected inside each of the round tubes 7, and the round rods 8 can move within the round tubes 7. Rotation: Springs are provided between the top inner wall of multiple sets of round tubes 7 and the top of round rods 8. The bottom ends of two round rods 8 on the same side are provided with fixing plates 9 via quick-release components. Two symmetrical connecting rods 10 are fixedly connected between the two fixing plates 9 by bolts. A fixing clamp 11 is fixedly connected to one side of one of the fixing plates 9 by bolts. A sliding clamp 12 is slidably connected to the two connecting rods 10. A threaded rod 13 is fixedly connected to one side of the sliding clamp 12 by bolts. One end of the threaded rod 13 passes through one side of one of the fixing plates 9 and is threadedly connected to it. V-shaped platforms are provided on the opposite sides of the sliding clamp 12 and the fixing clamp 11. Water is filled in the water tank 1.

[0023] Specifically, when it is necessary to test the airtightness of the nitrogen spring, the nitrogen spring is first placed on the V-shaped platform on the fixed clamping block 11 and the sliding clamping block 12, and then clamped. When clamping, the threaded rod 13 is rotated. As the threaded rod 13 rotates, it will drive the sliding clamping block 12 to move along the connecting rod 10 toward the fixed clamping block 11, thereby clamping and fixing the nitrogen spring.

[0024] With the multi-section electric push rod 4, the nitrogen spring being tested can be lifted to the top of the device after the test is completed. This eliminates the need for multiple water draining operations during the testing of a large number of test pieces, saving a lot of time and effectively increasing the efficiency of the test.

[0025] In this utility model, the lower surfaces of the two fixing plates 9 are each fixedly connected with multiple positioning rods 16 by bolts, and the bottom inner wall of the water tank 1 is fixedly connected with a support base 14 by bolts. The upper surface of the support base 14 is fixedly connected with two sets of positioning recesses 15 that cooperate with the positioning rods 16 by bolts.

[0026] Specifically, after the nitrogen spring is fixed, the multi-section electric push rod 4 is activated to extend, which in turn drives the cross-shaped frame 6 to move downward through the connecting frame 5, thereby driving the nitrogen spring below it to move downward until the positioning rod 16 at the bottom of the fixing plate 9 is inserted into the multiple positioning recesses 15 on the support base 14.

[0027] Then, the multi-section electric push rod 4 continues to extend. At this time, the cross-shaped frame 6 moves downward to compress the nitrogen spring and test its sealing performance. While it is contracting, the round tube 7 moves downward, and the spring is compressed. If air bubbles are generated around the nitrogen spring during the test, the sealing performance is unqualified. If no air bubbles are generated, the product is qualified.

[0028] The positioning recess 15 provided on the support base 14 and the positioning rod 16 provided at the bottom of the fixing plate 9 can be used to position the plate after it is submerged in water, so as to avoid tilting during the test and affecting the accuracy of the test.

[0029] In this utility model, the quick-release assembly includes two sets of annular blocks 17 fixedly connected to both sides of two fixing plates 9 by bolts, and each set consists of two blocks. Each set of annular blocks 17 has annular grooves 18 and two symmetrical clearance grooves 19 that cooperate with the annular grooves 18. The bottom ends of multiple round rods 8 are welded with annular blocks 20, and two symmetrical locking blocks 21 that cooperate with the clearance grooves 19 are welded on the annular blocks 20.

[0030] Specifically, after the test is completed, the multi-section electric push rod 4 is activated to retract, thereby moving the nitrogen spring upward until it is above the square opening 2. When replacing the nitrogen spring, first rotate the multiple round rods 8 until the locking block 21 and the clearance groove 19 are in the same straight line, then move the fixing plate 9 downward to disengage it from the round rods 8.

[0031] In this utility model, sliding openings 22 are provided on both sides of the U-shaped frame 3, and I-shaped blocks 23 are slidably connected in both sliding openings 22. The opposite sides of the two I-shaped blocks 23 are respectively fixed to the two ends of the connecting frame 5.

[0032] Specifically, the reverse rotation of the threaded rod 13 drives the sliding clamp 12 to move in the opposite direction along the connecting rod 10 to loosen the nitrogen spring. After replacing it with a new nitrogen spring, the threaded rod 13 is rotated in the opposite direction again to fix the nitrogen. Then, the locking block 21 is inserted into the annular groove 18 along the clearance groove 19. When the round rod 8 is rotated, the locking block 21 rotates into the annular groove 18, and the test can continue.

[0033] The V-shaped grooves on the fixed clamp and sliding clamp 12 facilitate the fixing of nitrogen springs of different sizes, increasing the applicability of the device.

[0034] It should be noted that the multi-section electric actuator 4 is existing technology, and those skilled in the art can configure it according to actual needs, which will not be elaborated here.

[0035] It should be noted that the inner wall of the threaded hole on the fixing plate 9 has an axially arranged annular groove, into which a nylon 66 damping ring with a Shore hardness of 85A is embedded. The continuous axial clamping force generated by its elastic deformation forms a 15°-20° helix angle interference fit with the surface of the threaded rod 13. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, increasing the coefficient of friction between the thread contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing loosening displacement caused by thread springback.

[0036] The use of this utility model involves the following steps:

[0037] S1: When it is necessary to test the airtightness of the nitrogen spring, first place the nitrogen spring on the V-shaped platform on the fixed clamping block 11 and the sliding clamping block 12, and then clamp it. When clamping, rotate the threaded rod 13. As the threaded rod 13 rotates, it will drive the sliding clamping block 12 to move along the connecting rod 10 towards the fixed clamping block 11, thereby clamping and fixing the nitrogen spring.

[0038] S2: After the nitrogen spring is fixed, the multi-section electric push rod 4 is activated to extend and then drive the cross-shaped frame 6 to move downward through the connecting frame 5, which in turn drives the nitrogen spring below it to move downward until the positioning rod 16 at the bottom of the fixing plate 9 is inserted into the multiple positioning recesses 15 on the support base 14.

[0039] S3: Then continue to extend the multi-section electric push rod 4. At this time, the cross-shaped frame 6 moves downward to squeeze the nitrogen spring to make it contract and test its sealing performance. At the same time as the contraction, the round tube 7 moves downward. At this time, the spring is compressed. If bubbles are generated around the nitrogen spring during the test, the sealing performance is unqualified. If no bubbles are generated, the product is qualified.

[0040] S4: After the test is completed, start the multi-section electric push rod 4 to retract, thereby moving the nitrogen spring up until it is above the square opening 2. When replacing the new nitrogen spring, first rotate the multiple round rods 8 until the locking block 21 and the clearance groove 19 are in the same straight line, then move the fixing plate 9 down to disengage it from the round rods 8.

[0041] S5: Then rotate the threaded rod 13 in the opposite direction to drive the sliding clamp 12 to move in the opposite direction along the connecting rod 10 to loosen the nitrogen spring. After replacing it with a new nitrogen spring, rotate the threaded rod 13 in the opposite direction to fix the nitrogen. Then insert the clamp 21 into the annular groove 18 along the clearance groove 19. Then rotate the round rod 8 and the clamp 21 will rotate into the annular groove 18. The test can then continue.

[0042] Finally, the following points should be noted: 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 connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0043] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0044] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. An airtightness testing device for nitrogen spring processing, comprising a water tank (1), characterized in that: The water tank (1) has a square opening (2) at its top. A U-shaped frame (3) is fixedly connected to the outer top wall of the water tank (1) on both sides of the square opening (2). Multiple electric push rods (4) are fixedly connected to the outer top wall of the U-shaped frame (3). The output end of the multiple electric push rods (4) passes through the inner top wall of the U-shaped frame (3) and is fixedly connected to a connecting frame (5). A cross-shaped frame (6) is fixedly connected to the bottom end of the connecting frame (5). The lower surface of the cross-shaped frame (6) is fixedly connected to... Multiple round tubes (7) are connected, and round rods (8) are slidably connected inside each of the multiple round tubes (7). The round rods (8) can rotate inside the round tubes (7). The bottom ends of two round rods (8) on the same side are provided with fixing plates (9) through quick-release components. Two symmetrical connecting rods (10) are fixedly connected between the two fixing plates (9). A fixing clamp (11) is fixedly connected to one side of one of the fixing plates (9). Sliding clamps (12) are slidably connected to the two connecting rods (10).

2. The airtightness testing device for nitrogen spring processing according to claim 1, characterized in that: A threaded rod (13) is fixedly connected to one side of the sliding clamp (12). One end of the threaded rod (13) passes through one side of one of the fixed plates (9) and is threadedly connected to it. V-shaped platforms are provided on the opposite sides of the sliding clamp (12) and the fixed clamp (11).

3. The airtightness testing device for nitrogen spring processing according to claim 2, characterized in that: The quick-release assembly includes two sets of annular blocks (17) fixedly connected to both sides of two fixing plates (9), and each set consists of two blocks. Each set of annular blocks (17) has annular grooves (18) and two symmetrical clearance grooves (19) that cooperate with the annular grooves (18). The bottom ends of the round rods (8) are fixedly connected to annular blocks (20), and each set of annular blocks (20) has two symmetrical locking blocks (21) that cooperate with the clearance grooves (19).

4. The airtightness testing device for nitrogen spring processing according to claim 1, characterized in that: A spring is provided between the top inner wall of the multiple sets of circular tubes (7) and the top end of the circular rod (8).

5. The airtightness testing device for nitrogen spring processing according to claim 2, characterized in that: Multiple positioning rods (16) are fixedly connected to the lower surfaces of the two fixing plates (9). A support base (14) is fixedly connected to the bottom inner wall of the water tank (1). Two sets of positioning recesses (15) that cooperate with the positioning rods (16) are fixedly connected to the upper surface of the support base (14).

6. The airtightness testing device for nitrogen spring processing according to claim 1, characterized in that: The U-shaped frame (3) has sliding openings (22) on both sides, and I-shaped blocks (23) are slidably connected in both sliding openings (22). The opposite sides of the two I-shaped blocks (23) are fixed to the two ends of the connecting frame (5).

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