A shell airtightness detection tool

Abstract

The utility model relates to precise detection equipment technical field discloses a kind of shell airtightness detection frock, including transport component, the transport component includes control cabinet, the central position at the top of control cabinet is fixedly connected with electric slide rail, the top of control cabinet is fixedly connected with seal cover, the outer surface of electric slide rail is slidably installed with moving seat, the top of moving seat is fixedly connected with placing plate.The utility model sets up top connecting plate at the bottom of sealing cap, and the impact force when air cylinder is pressed down is effectively absorbed by being linked with limit stop along limit frame and cooperating with the elastic buffer effect of spring damper;Main connecting rod is used as lever fulcrum, and converts horizontal displacement into longitudinal buffer stroke, forms multistage damping system, both guarantees the high-precision fit of sealing cap and connecting deflation rod, and also prevents equipment wear or workpiece deviation caused by rigid impact, thereby prolongs the service life of device and ensures the consistency of detection result.

Description

Technical Field

[0001] This utility model relates to the field of precision testing equipment technology, and in particular to a tooling for testing the airtightness of a shell. Background Technology

[0002] With the increasing demands for product reliability from the new energy vehicle, semiconductor packaging, and medical device industries, high-precision airtightness testing is required for key components such as battery housings, sensor housings, and syringe pumps during the manufacturing of automotive parts, assembly of electronic components, and production of medical equipment. This necessitates the use of housing airtightness testing fixtures. In practical use, similar shell air tightness testing fixtures still have many defects, such as: the positioning accuracy of traditional shell air tightness testing fixtures is insufficient, and the traditional shell air tightness testing fixture cylinder direct drive scheme is prone to mechanical resonance during rapid mold closing, causing sensor data drift. Therefore, it is necessary to design a shell air tightness testing fixture. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a housing airtightness testing fixture.

[0004] This utility model is achieved using the following technical solution: a housing airtightness testing fixture, including a transport component, the transport component including a control cabinet, an electric slide rail fixedly connected to the center of the top of the control cabinet, a sealing cover fixedly connected to the top of the control cabinet, a movable seat slidably mounted on the outer surface of the electric slide rail, a placement plate fixedly connected to the top of the movable seat, and a fixture body inserted into the interior of the placement plate, further comprising: A sealing assembly, comprising a cylinder fixedly connected to the top of a sealing cover, the output end of the cylinder being fixedly connected to a sealing cover via a connecting seat, and an air supply pipe being fixedly connected to the inside of the sealing cover via a pressure regulating valve; A buffer assembly, comprising a top connecting plate fixedly connected to the bottom of the sealing cover, wherein the bottom of the top connecting plate is connected to a bottom connecting plate via a secondary connecting rod and a main connecting rod.

[0005] As a further improvement to the above solution, a push rod is fixedly connected to the output end of the cylinder, a connecting seat is fixedly connected to the bottom of the push rod, a sealing cover is fixedly connected to the bottom of the connecting seat, and a pressure regulating valve is fixedly connected to the top of the sealing cover.

[0006] Through the above technical solution, this design enables the sealing cover to maintain a stable posture during descent, avoiding tilting or jamming caused by uneven load.

[0007] As a further improvement to the above solution, the output end of the pressure regulating valve is fixedly connected to an air supply pipe, the air supply pipe is fixedly connected to the inside of the connecting seat, and the bottom of the air supply pipe is provided with a connecting vent rod fixedly connected to the center position of the placement plate.

[0008] The above technical solution ensures that there is no risk of leakage during the transmission of the air pressure signal from the pressure regulating valve to the connecting vent rod.

[0009] As a further improvement to the above solution, a bottom connecting plate is fixedly connected to the top of the control cabinet, and a limit bracket is fixedly connected to the top of the bottom connecting plate.

[0010] The above technical solution, by setting a bottom connecting plate on the top of the control cabinet and rigidly riveting it to the limit frame, facilitates the formation of the basic installation platform for the buffer assembly, which provides a stable support benchmark for the subsequent multi-level linkage mechanism.

[0011] As a further improvement to the above solution, the two sides of the top of the bottom connecting plate are rotatably connected to the main connecting rods, and the side of the main connecting rods away from the bottom connecting plate is rotatably connected to the inside of the limiting seat.

[0012] Through the above technical solution, the two ends of the main connecting rod are respectively hinged to the bottom connecting plate and the limiting seat, thereby driving the establishment of a four-bar linkage mechanism. When subjected to external impact, the mechanism can decompose the longitudinal impact force into lateral displacement, thereby dissipating energy.

[0013] As a further improvement to the above solution, the limiting seat is slidably installed inside the limiting frame, and a spring damper is fixedly connected to the outer surface of the limiting seat. The other side of the spring damper is fixedly connected to the inner wall of the limiting frame.

[0014] Through the above technical solution, the limit seat and the inner wall of the limit frame are connected by a spring damper, which drives the integration of a nonlinear elastic buffer system. Its progressive stiffness characteristics can absorb high-frequency vibration and limit the maximum stroke to avoid overshoot.

[0015] As a further improvement to the above solution, the limiting seat is rotatably connected to a secondary connecting rod, the top of which is rotatably connected to the inside of a top connecting plate, and the top connecting plate is fixedly connected to the bottom of the sealing cover.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes the sliding cooperation between an electric slide rail and a moving base to drive the horizontal displacement of the tooling body on the placement plate, achieving precise positioning of the housing to be tested. Combined with the vertical transmission of the cylinder-driven push rod and the connecting seat, the sealing cover and the connecting vent rod form a sealed connection. During this process, the pressure regulating valve establishes a stable air pressure path through the air supply pipe, injecting the preset pressure gas into the housing. The pressure change feedback is used to determine the sealing performance. This structure, through the combination of mechanical linkage and pneumatic control, significantly improves the testing efficiency and ease of operation, while avoiding positioning errors caused by manual intervention.

[0017] This invention features a top connecting plate at the bottom of the sealing cover, which slides along the limiting frame via a secondary connecting rod and a linkage limiting seat. Combined with the elastic buffering effect of a spring damper, it effectively absorbs the impact force when the cylinder is pressed down. The main connecting rod acts as a lever fulcrum, converting lateral displacement into longitudinal buffer stroke, forming a multi-stage shock absorption system. This ensures a high-precision fit between the sealing cover and the connecting venting rod, while preventing equipment wear or workpiece displacement caused by rigid collisions. This extends the service life of the device and ensures the consistency of the test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the sealing cover of this utility model; Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the internal structure of the present utility model; Figure 5 This utility model Figure 4 Enlarged schematic diagram of the structure at point B.

[0019] Explanation of key symbols: 1. Transport Components; 101. Control Cabinet; 102. Electric Slide Rail; 103. Sealing Cover; 104. Moving Seat; 105. Placement Plate; 106. Tooling Body; 2. Sealing Components; 201. Cylinder; 202. Push Rod; 203. Connecting Seat; 204. Sealing Cover; 205. Pressure Regulating Valve; 206. Air Supply Pipe; 207. Connecting Vent Rod; 3. Buffer Components; 301. Bottom Connecting Plate; 302. Limiting Frame; 303. Main Connecting Rod; 304. Limiting Seat; 305. Spring Damper; 306. Secondary Connecting Rod; 307. Top Connecting Plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] Example: Please combine Figure 1-5 This embodiment of a housing airtightness testing fixture includes a transport assembly 1, which includes a control cabinet 101. An electric slide rail 102 is fixedly connected to the center of the top of the control cabinet 101. A sealing cover 103 is fixedly connected to the top of the control cabinet 101. A movable seat 104 is slidably mounted on the outer surface of the electric slide rail 102. A placement plate 105 is fixedly connected to the top of the movable seat 104. A fixture body 106 is inserted into the interior of the placement plate 105. The fixture also includes: The sealing assembly 2 includes a cylinder 201 fixedly connected to the top of the sealing cover 103. The output end of the cylinder 201 is fixedly connected to a sealing cover 204 via a connecting seat 203. The inside of the sealing cover 204 is fixedly connected to an air supply pipe 206 via a pressure regulating valve 205. The buffer assembly 3 includes a top connecting plate 307 fixedly connected to the bottom of the sealing cover 204, and a bottom connecting plate 301 connected to the bottom of the top connecting plate 307 and the main connecting rod 303 via a secondary connecting rod 306.

[0022] A push rod 202 is fixedly connected to the output end of cylinder 201. A connecting seat 203 is fixedly connected to the bottom of push rod 202. A sealing cover 204 is fixedly connected to the bottom of connecting seat 203. A pressure regulating valve 205 is fixedly connected to the top of sealing cover 204.

[0023] The output end of the pressure regulating valve 205 is fixedly connected to the gas supply pipe 206, which is fixedly connected to the inside of the connecting seat 203. The bottom of the gas supply pipe 206 is provided with a connecting venting rod 207 fixedly connected to the center of the placement plate 105.

[0024] When cylinder 201 is started, its output end pushes push rod 202 downward, and the force is transmitted through connecting seat 203, causing sealing cover 204 to descend vertically until it is completely in contact with the top of connecting vent rod 207. During this process, pressure regulating valve 205 establishes a gas passage through gas supply pipe 206.

[0025] The top of the control cabinet 101 is fixedly connected to a bottom connecting plate 301, and the top of the bottom connecting plate 301 is fixedly connected to a limit bracket 302.

[0026] The top two sides of the bottom connecting plate 301 are rotatably connected to the main connecting rod 303, and the side of the main connecting rod 303 away from the bottom connecting plate 301 is rotatably connected to the inside of the limiting seat 304.

[0027] The limiting seat 304 is slidably installed inside the limiting frame 302. A spring damper 305 is fixedly connected to the outer surface of the limiting seat 304, and the other side of the spring damper 305 is fixedly connected to the inner wall of the limiting frame 302.

[0028] The limiting seat 304 is rotatably connected to a secondary connecting rod 306. The top of the secondary connecting rod 306 is rotatably connected to the inside of the top connecting plate 307. The top connecting plate 307 is fixedly connected to the bottom of the sealing cover 204.

[0029] During the pressing down of the sealing cover 204, the top connecting plate 307 fixed at the bottom drives the limiting seat 304 to slide along the inner wall of the limiting frame 302 through the secondary connecting rod 306. At this time, the spring damper 305 is compressed and produces elastic deformation, absorbing the impact energy generated by the rapid downward movement of the sealing cover 204.

[0030] The implementation principle of a housing airtightness testing fixture in this application embodiment is as follows: the electric slide rail 102 on the top of the control cabinet 101 drives the moving seat 104 to move horizontally, which drives the fixture body 106 on the placement plate 105 to be precisely positioned directly below the sealing cover 103. At this time, the cylinder 201 is started, and its output end pushes the push rod 202 to extend downward. The force is transmitted through the connecting seat 203, so that the sealing cover 204 descends vertically until it is completely in contact with the top of the connecting vent rod 207. During this process, the pressure regulating valve 205 establishes a gas passage through the gas supply pipe 206 and injects the gas with a preset pressure value into the housing to be tested through the connecting vent rod 207. If there is a leak in the housing, the internal air pressure will gradually decrease over time, and otherwise it will remain stable. During the pressing down of the sealing cover 204, the top connecting plate 307 fixed at its bottom drives the limiting seat 304 to slide along the inner wall of the limiting frame 302 via the auxiliary connecting rod 306. At this time, the spring damper 305 is compressed and generates elastic deformation, absorbing the impact energy generated by the rapid downward movement of the sealing cover 204, avoiding rigid collisions that could damage the equipment or cause positioning deviation. At the same time, the main connecting rod 303 acts as a lever fulcrum, converting the lateral displacement into a longitudinal buffer stroke. Combined with the damping characteristics of the spring damper, a multi-stage shock absorption system is formed to ensure the connection between the sealing cover 204 and the connecting vent rod 207. The entire system achieves efficient airtightness detection through the combination of mechanical linkage and fluid mechanics, while significantly improving operational stability and the reliability of detection results.

[0031] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A housing airtightness testing fixture, comprising a transport assembly (1), the transport assembly (1) comprising a control cabinet (101), an electric slide rail (102) fixedly connected to the center of the top of the control cabinet (101), a sealing cover (103) fixedly connected to the top of the control cabinet (101), a movable seat (104) slidably mounted on the outer surface of the electric slide rail (102), a placement plate (105) fixedly connected to the top of the movable seat (104), and a fixture body (106) inserted into the interior of the placement plate (105), characterized in that, Also includes: The sealing assembly (2) includes a cylinder (201) fixedly connected to the top of the sealing cover (103). The output end of the cylinder (201) is fixedly connected to a sealing cover (204) via a connecting seat (203). The inside of the sealing cover (204) is fixedly connected to an air supply pipe (206) via a pressure regulating valve (205). The buffer assembly (3) includes a top connecting plate (307) fixedly connected to the bottom of the sealing cover (204), and the bottom of the top connecting plate (307) is connected to the main connecting rod (303) via a secondary connecting rod (306) and a bottom connecting plate (301).

2. The hermeticity testing tool for a housing of claim 1, wherein: The output end of the cylinder (201) is fixedly connected to a push rod (202), the bottom of the push rod (202) is fixedly connected to a connecting seat (203), the bottom of the connecting seat (203) is fixedly connected to a sealing cover (204), and the top of the sealing cover (204) is fixedly connected to a pressure regulating valve (205).

3. The hermeticity testing tool for a housing of claim 2, wherein: The output end of the pressure regulating valve (205) is fixedly connected to an air supply pipe (206), which is fixedly connected to the inside of the connecting seat (203). The bottom of the air supply pipe (206) is provided with a connecting venting rod (207) fixedly connected to the center of the placement plate (105).

4. The hermeticity testing tool of claim 1, wherein: The top of the control cabinet (101) is fixedly connected to a bottom connecting plate (301), and the top of the bottom connecting plate (301) is fixedly connected to a limit frame (302).

5. The hermeticity testing tool for a housing of claim 4, wherein: The bottom connecting plate (301) has main connecting rods (303) rotatably connected to both sides of its top. The side of the main connecting rod (303) away from the bottom connecting plate (301) is rotatably connected to the inside of the limiting seat (304).

6. The hermeticity testing tool for a housing of claim 5, wherein: The limiting seat (304) is slidably installed inside the limiting frame (302). A spring damper (305) is fixedly connected to the outer surface of the limiting seat (304). The other side of the spring damper (305) is fixedly connected to the inner wall of the limiting frame (302).

7. The hermeticity testing tool for a housing of claim 6, wherein: The limiting seat (304) is rotatably connected to a secondary connecting rod (306), the top of which is rotatably connected to the inside of a top connecting plate (307), and the top connecting plate (307) is fixedly connected to the bottom of a sealing cover (204).

Images