Air tightness testing equipment with self-locking function

Abstract

This utility model discloses an airtightness testing device with a self-locking function, comprising: a frame, a first drive mechanism, a lower seal, an upper seal, an inflation system, and a pressure detector. The frame includes a worktable and a support frame mounted on the worktable. The lower seal is mounted on the worktable. The first drive mechanism is mounted on the support frame, and its output shaft is connected to the upper seal via a self-locking component. The upper seal has an air passage, and the inflation system and the pressure detector are respectively connected to the air passage. This solution provides accurate testing without causing contamination or damage to the internal parts of the ABS hydraulic unit.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically an airtightness testing device with a self-locking function. Background Technology

[0002] Good airtightness is fundamental to ensuring accurate braking pressure regulation in a car's ABS system. If the ABS system leaks air, the braking pressure may not be able to be precisely controlled according to the ECU's instructions, leading to uncontrolled wheel slip, increased braking distance, and in severe cases, endangering driving safety. Therefore, it is essential to perform airtightness testing on the car's ABS module before it leaves the factory.

[0003] Currently, the industry typically tests the airtightness of ABS modules by immersing them in liquid. However, improper operation or poor airtightness of the product can lead to liquid entering the product and potentially contaminating or damaging other internal components. Utility Model Content

[0004] To overcome the deficiencies in the prior art, this utility model provides an airtightness testing device with a self-locking function, which is used to solve the above-mentioned problems.

[0005] This application discloses an airtightness testing device with a self-locking function, comprising: a frame, a first drive mechanism, a lower seal, an upper seal, an inflation system, and a pressure detector. The frame includes a workbench and a support frame disposed on the workbench. The lower seal is mounted on the workbench. The first drive mechanism is mounted on the support frame, and its output shaft is connected to the upper seal via a self-locking component. The upper seal is provided with an air passage, and the inflation system and the pressure detector are respectively connected to the air passage.

[0006] Specifically, the self-locking component includes a first rod, a second rod, a third rod, and a fourth rod connected in sequence; one end of the first rod is fixedly connected to the output shaft of the first drive mechanism, and the other end is hinged to the second rod; both ends of the third rod are hinged to the second rod and the fourth rod, respectively; and one end of the fourth rod away from the third rod is fixedly connected to the upper sealing component.

[0007] Specifically, the self-locking component also includes a horizontal slide and a vertical slide. The first rod includes a horizontal part and a vertical part that are connected to each other. The horizontal part is connected to the output shaft of the first drive mechanism and is slidably connected to the horizontal slide. The fourth rod is slidably connected to the vertical slide.

[0008] Specifically, the first drive mechanism includes an electric cylinder or a pneumatic cylinder.

[0009] Specifically, the upper sealing element includes a mounting plate, a first sealing plate, and a first sealing gasket connected sequentially from top to bottom. The mounting plate is fixed to the fourth rod, and the first sealing plate is provided with the air passage.

[0010] Specifically, the air passage is a through hole that penetrates the first sealing plate.

[0011] Specifically, the upper seal further includes a second sealing plate and a second sealing gasket, the second sealing plate being connected to the output shaft of the second drive mechanism fixed on the support frame.

[0012] Specifically, the lower sealing element includes a third sealing plate, multiple positioning blocks, and a third sealing gasket. The multiple positioning blocks are disposed on the third sealing plate to form a positioning space, and the third sealing plate is disposed within the positioning space.

[0013] This utility model has at least the following beneficial effects:

[0014] 1. This utility model uses upper and lower sealing elements to seal the upper and lower ends of the ABS hydraulic unit, which serves as the ABS module regulator, before inflating it to perform air tightness testing. This method is accurate and will not cause contamination or damage to the internal parts of the ABS hydraulic unit.

[0015] 2. This utility model is for air tightness testing of ABS hydraulic units that are not assembled into ABS modules. If the air tightness of the ABS hydraulic unit is found to be unqualified, it can be directly reworked or scrapped. Compared with the ABS hydraulic unit being assembled into ABS modules and then being found to be defective, this testing equipment and testing method can reduce the defect rate of finished products and save production costs.

[0016] 3. By incorporating a self-locking component, this utility model can prevent the upper seal from being pushed upwards by the gas inside the ABS hydraulic unit, thereby further improving the detection accuracy.

[0017] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the structure of the airtightness testing device with self-locking function (including the guide mechanism and the upper seal not yet pressed down) in this embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the airtightness testing device with self-locking function (excluding the guide mechanism and the upper seal not yet pressed down) in this embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the structure of the airtightness testing device with self-locking function (excluding the guide mechanism and with the upper seal pressed down) in this embodiment of the utility model;

[0023] Figure 5 This is a top view of the upper sealing element in an embodiment of this utility model;

[0024] Figure 6 yes Figure 5 Sectional view at point BB;

[0025] Figure 7 This is a schematic diagram of the structure of the lower sealing element in an embodiment of this utility model;

[0026] Figure 8 This is a schematic diagram of the ABS hydraulic unit in an embodiment of this utility model.

[0027] The reference numerals in the above figures are as follows: 1. Support frame; 2. First drive mechanism; 3. Lower seal; 31. Third sealing plate; 32. Positioning block; 33. Third sealing gasket; 4. Upper seal; 41. Mounting plate; 42. First sealing plate; 421. Through hole; 43. First sealing gasket; 44. Second sealing plate; 45. Second sealing gasket; 5. Air inlet / outlet port; 7. Self-locking component; 711. Horizontal part; 712. Vertical part; 72. Second rod; 73. Third rod; 74. Fourth rod; 75. Horizontal slide; 76. Vertical slide; 81. First guide mechanism; 82. Second guide mechanism; 9. Second drive mechanism; 10. ABS hydraulic unit; 110. Main body; 120. PIN pin connection part. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "fixing," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0032] Furthermore, the terms "first" and "second" are used only to distinguish between different terms in description and do not have any special meaning.

[0033] Combination Figures 1 to 4As shown, the airtightness testing device with self-locking function in this embodiment mainly includes: a frame, a first drive mechanism 2, a lower seal 3, an upper seal 4, an inflation system (not shown), and a pressure detector (not shown). The frame includes a support frame 1 and a worktable (not shown in the figure; its actual location should be connected to the bottom of the two longitudinal beams of the support frame 1); the lower seal 3 is mounted on the worktable, i.e., the worktable supports the lower seal 3; the first drive mechanism 2 is mounted on the support frame 1, and its output shaft is connected to the upper seal 4 via a self-locking component 7. The first drive mechanism 2 is used for the linear movement of the upper seal 4, thereby causing the upper seal 4 to press or separate from the lower seal 3; the upper seal 4 is provided with an air passage, through which the inflation system and the pressure detector are respectively connected to the ABS hydraulic unit 10 (e.g., ...). Figure 8 The system (as shown) fills the ABS hydraulic unit 10 with gas and detects changes in the gas inside.

[0034] It should be noted that the ABS hydraulic unit 10 in this embodiment is an important component of the ABS module. One end of the unit is used to connect to the base plate, and the other end is used to connect to the hydraulic pump to form the ABS module.

[0035] An inflation system can be a common device in existing technology used to increase the internal pressure of an item.

[0036] Combination Figure 3 and Figure 4 As shown, the self-locking component 7 in this embodiment is a linkage mechanism. This linkage mechanism includes a first rod, a second rod 72, a third rod 73, and a fourth rod 74, which are hinged sequentially. Specifically, one end of the first rod is fixedly connected to the output shaft of the first drive mechanism 2, and the other end is hinged to one end of the second rod 72; one end of the third rod 73 is hinged to the other end of the second rod 72, and the other end of the third rod 73 is hinged to the fourth rod 74; the end of the fourth rod 74 facing away from the third rod 73 is fixedly connected to the upper seal 4.

[0037] To ensure that each rod can move in a preset direction, the self-locking component 7 also includes a horizontal slide 75 and a vertical slide 76 mounted on the support frame 1. The horizontal slide 75 guides the first rod, and the vertical slide 76 guides the fourth rod 74. Further, the first rod includes a horizontal portion 711 and a vertical portion 712 connected together. The horizontal portion 711 is connected to the output shaft of the first drive mechanism 2 and slidably connected to the horizontal slide 75. The upper end of the fourth rod 74 has a square structure, used for hinged connection with the third rod 73 and slidably connected to the vertical slide 76. The lower end of the fourth rod 74 is cylindrical and has external threads, used for fixed connection with the upper seal 4.

[0038] Specifically, the first drive mechanism 2 is either an electric cylinder or a pneumatic cylinder. Taking a pneumatic cylinder as an example, the piston rod of the cylinder is connected to the horizontal portion 711 of the first rod of the self-locking component 7. When the piston rod extends or retracts, it drives the first rod to move, thereby driving the second rod 72, the third rod 73, and the fourth rod 74 to move. Figure 4 As shown, when the piston rod of the cylinder extends, with the movement of each connecting rod, the upper seal 4 moves downward to press against the lower seal 3. At this time, the third rod 73 is in a horizontal state, and the second rod 72 and the fourth rod 74 are in a vertical state, which puts the linkage mechanism in a self-locking state. That is to say, during testing, if the piston rod of the cylinder does not actively retract, the air pressure inside the tested product cannot push the fourth rod 74 upward to passively retract the piston rod of the cylinder.

[0039] In traditional cylinder-driven systems, the driven component (such as the upper seal 4 in this embodiment) is typically positioned so that its movement direction aligns with the extension and retraction direction of the piston rod. A problem with this configuration is that when the product being tested is filled with a large amount of gas, creating significant pressure, the upper seal 4 tends to move upwards under the internal pressure, forcing the piston rod to retract. This results in the upper seal 4 and lower seal 3 not being tightly pressed together, affecting the accuracy of the test. To avoid this problem, increasing the cylinder output can be used, but this inevitably leads to a significant increase in cylinder size and a larger equipment footprint. This embodiment uses a self-locking component 7 to connect the cylinder and the upper seal 4, which avoids the problem of the cylinder piston rod passively retracting and eliminates the need for a large cylinder, thus saving equipment space.

[0040] Combination Figures 5 to 6 As shown, the upper sealing member 4 in this embodiment includes a mounting plate 41, a first sealing plate 42, and a first sealing gasket 43 connected sequentially from top to bottom. The mounting plate 41 is fixed to the fourth rod 74 of the self-locking member 7, the first sealing plate 42 is fixed below the mounting plate 41, and the first sealing gasket 43 is disposed below the first sealing plate 42. The first sealing plate 42 and the first sealing gasket 43 are used to seal the main body 110 of the ABS hydraulic unit 10 from above. The aforementioned air passage is provided on the first sealing plate 42; specifically, the air passage is a through hole 421 penetrating the first sealing plate 42. An air inlet / outlet interface 5 is connected to the through hole 421. This air inlet / outlet interface 5 is used to connect to the pipeline of the inflation system and is also used to connect to a pressure detector.

[0041] Preferably, the upper seal 4 further includes a second sealing plate 44 and a second sealing washer 45. The second sealing plate 44 and the second sealing washer 45 are used to seal the pin connection portion 120 of the ABS hydraulic unit 10 from above. Correspondingly, the support frame 1 is provided with a second drive mechanism 9 for driving the second sealing plate 44 to move up and down, and the second sealing plate 44 is fixed to the output shaft of the second drive mechanism 9. The second drive mechanism 9 can be an electric cylinder or a pneumatic cylinder.

[0042] The support frame 1 is also provided with a first guide mechanism 81 for guiding the first sealing plate 42 and a second guide mechanism 82 for guiding the second sealing plate 44.

[0043] like Figure 7 As shown, the lower seal 3 in this embodiment includes a third sealing plate 31, a plurality of positioning blocks 32, and a third sealing gasket 33. The third sealing plate 31 is detachably fixed to the worktable, and the plurality of positioning blocks 32 are detachably fixed to the third sealing plate 31 and form a positioning space. The third sealing plate is disposed in the positioning space to seal the ABS hydraulic unit 10 from below.

[0044] In summary, the working process of the airtightness testing device with self-locking function in this embodiment is as follows:

[0045] Will as Figure 8 The ABS hydraulic unit 10 shown is placed on the third sealing plate 31 and positioned well. The first driving mechanism 2 drives the first sealing plate 42 to descend, and the second driving mechanism 9 drives the second sealing plate 44 to descend, until the first sealing plate 42 and the second sealing plate 44 press against the upper end of the ABS hydraulic unit 10, thus forming a closed space inside the ABS hydraulic unit 10. The inflation system fills the interior of the ABS hydraulic unit 10 with gas through the air inlet and outlet ports 5, so that the internal air pressure reaches a preset value, and maintains the pressure at this air pressure value for a preset time. During the pressure holding process, the air pressure detector detects the air pressure change inside the ABS hydraulic unit 10. If the air pressure change is less than the preset range, it indicates that the ABS hydraulic unit 10 has good airtightness.

[0046] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. An airtightness testing device with a self-locking function, characterized in that, include: The device includes a frame, a first drive mechanism, a lower seal, an upper seal, an inflation system, and a pressure detector. The frame includes a worktable and a support frame mounted on the worktable. The lower seal is mounted on the worktable. The first drive mechanism is mounted on the support frame, and its output shaft is connected to the upper seal via a self-locking component. The upper seal has an air passage. The inflation system and the pressure detector are respectively connected to the air passage.

2. The airtightness testing device with self-locking function according to claim 1, characterized in that, The self-locking component includes a first rod, a second rod, a third rod, and a fourth rod connected in sequence; one end of the first rod is fixedly connected to the output shaft of the first drive mechanism, and the other end is hinged to the second rod; both ends of the third rod are hinged to the second rod and the fourth rod, respectively; the end of the fourth rod facing away from the third rod is fixedly connected to the upper seal.

3. The airtightness testing device with self-locking function according to claim 2, characterized in that, The self-locking component also includes a horizontal slide and a vertical slide. The first rod includes a horizontal part and a vertical part that are connected to each other. The horizontal part is connected to the output shaft of the first drive mechanism and is slidably connected to the horizontal slide. The fourth rod is slidably connected to the vertical slide.

4. The airtightness testing device with self-locking function according to claim 2, characterized in that, The first driving mechanism includes an electric cylinder or a pneumatic cylinder.

5. The airtightness testing device with self-locking function according to claim 2, characterized in that, The upper sealing element includes a mounting plate, a first sealing plate, and a first sealing gasket connected sequentially from top to bottom. The mounting plate is fixed to the fourth rod, and the first sealing plate is provided with the air passage.

6. The airtightness testing device with self-locking function according to claim 5, characterized in that, The air passage is a through hole that penetrates the first sealing plate.

7. The airtightness testing device with self-locking function according to claim 5, characterized in that, The upper seal also includes a second sealing plate and a second sealing gasket, the second sealing plate being connected to the output shaft of the second drive mechanism fixed on the support frame.

8. The airtightness testing device with self-locking function according to claim 1, characterized in that, The lower sealing element includes a third sealing plate, multiple positioning blocks, and a third sealing gasket. The multiple positioning blocks are disposed on the third sealing plate to form a positioning space, and the third sealing plate is disposed within the positioning space.

Images