Airtightness detection device for a sensor housing

Abstract

This utility model discloses an airtightness testing device for a sensor housing, specifically relating to the field of sensor testing technology. It includes a worktable with a bidirectional drive mechanism. A pair of fixed plates are mounted on the bidirectional drive mechanism, each fixed plate having a side plate fixedly connected to it. One end of each side plate has a fixed flange, and the other end has a slidably connected baffle. A movable support assembly is provided between the baffle and the side plate. A sensor housing is positioned between the pair of side plates, with inherent interfaces on both sides of the sensor housing. A lifting mechanism is also provided on the worktable, with a pair of propulsion cylinders. A sealing test assembly is located at the opposite end of each propulsion cylinder, used to seal the inherent interfaces. An airtightness detector is also mounted on the worktable. This utility model solves the technical problem of limited applicability of airtightness testing devices for detecting sensor housings.

Description

Technical Field

[0001] This utility model relates to the field of sensor detection technology, and more specifically, to a sensor housing airtightness detection device. Background Technology

[0002] Automotive sensors are an indispensable component of modern automobiles, providing crucial information to ensure driving safety, improve fuel efficiency, enhance the driving experience, and enable autonomous driving functions. There are many types of automotive sensors, each with its specific function and application scenarios. Major automotive sensors include speed sensors, acceleration sensors, pressure sensors, temperature sensors, gas sensors, and flow sensors. To ensure the airtightness and reliability of automotive sensors, the sensor housings often require airtightness testing.

[0003] For example, the utility model with patent publication number CN222837755U relates to a sensor housing airtightness testing fixture, including a bracket, a positioning part, a first pressing mechanism, and a second pressing mechanism. The positioning part is for placing the sensor housing to be tested. The first pressing mechanism includes a first sealing plug for inserting into a first blind hole in the sensor housing. The second pressing mechanism includes a second sealing plug for inserting into a second blind hole in the sensor housing. The second sealing plug has an air inlet channel, one end of which is located in the first blind hole, and the other end is used to connect to a high-pressure gas pipeline.

[0004] The above-mentioned patent has the following problems when used: Although the sealing test is achieved by using the inherent interface of the sensor housing and the testing mechanism, the sensor housing has a variety of length and width dimensions. The different dimensions of the sensor housing affect the positioning and testing of the airtightness test, which reduces the applicability of the airtightness test.

[0005] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a sensor housing airtightness detection device in order to achieve a more practical purpose. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that addresses the limited applicability of the sensor housing in airtightness testing devices.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an airtightness testing device for a sensor housing, comprising a worktable, a bidirectional drive mechanism on the worktable, a pair of fixed plates on the bidirectional drive mechanism, a side plate fixedly connected to each fixed plate, a retaining edge fixedly connected to one end of the side plate, a baffle slidably connected to the other end of the side plate, a movable support assembly between the baffle and the side plate, a sensor housing between the pair of side plates, and inherent interfaces on both sides of the sensor housing; The workbench is equipped with a lifting mechanism, which has a pair of propulsion cylinders. Each of the two propulsion cylinders has a sealing test component at its opposite end. The sealing test component is used to seal the inherent interface. The workbench is equipped with an airtightness tester, which is connected to one of the sealing test components.

[0008] In a preferred embodiment, the top of the workbench is provided with a telescopic groove, the bidirectional drive mechanism includes a bidirectional lead screw, the bidirectional lead screw is rotatably connected in the telescopic groove, one end of the bidirectional lead screw is fixedly connected to a handwheel, a pair of movable seats are drivenly connected to the bidirectional lead screw, and the movable seats are slidably connected in the telescopic groove, and the fixed plate is fixedly connected to the movable seats.

[0009] In a preferred embodiment, the movable support assembly includes a guide seat, which is fixedly connected to the side plate. A pull rod is slidably connected to the guide seat, one end of which is fixedly connected to the baffle plate. A wing bolt is provided between the pull rod and the guide seat.

[0010] In a preferred embodiment, a balance block is fixedly connected to the side plate, a light rod is slidably connected to the balance block, and one end of the light rod is fixedly connected to the baffle.

[0011] In a preferred embodiment, the lifting mechanism includes a lifting cylinder, which is fixedly connected to the bottom of the worktable. A pull plate is fixedly connected to the output end of the lifting cylinder, and a pair of support rods are fixedly connected to the pull plate. One end of each support rod passes through the worktable and is fixedly connected to the propulsion cylinder.

[0012] In a preferred embodiment, each plugging test assembly includes a plug rod disposed at the output end of the propulsion cylinder, and a sealing cone sleeve is fixedly connected to the outer surface of the plug rod, the sealing cone sleeve being inserted into the inherent interface.

[0013] In a preferred embodiment, one of the plug rods has an air chamber, and a detection air tube communicating with the air chamber is fixedly connected to the outer surface of one of the plug rods. The air tightness detector is connected to the detection air tube through an air pump hose.

[0014] The technical effects and advantages of this utility model are as follows: 1. The airtightness detection device for the sensor housing, by setting a pair of side plates, with the side plates surrounded by a baffle and a baffle, allows the pair of side plates to be close to each other, thus reserving a feeding area for the sensor housing and a clearance area for the inherent interface. In this way, the sensor housing can be automatically unloaded under the action of gravity. Because the bidirectional drive mechanism can drive the pair of side plates to move closer or further apart, the movable support component can adjust the lateral position of the baffle on the side plate. In this way, the length and width of the feeding area can be easily adjusted to accommodate sensor housings of different sizes for feeding and positioning.

[0015] 2. The airtightness testing device for the sensor housing is equipped with a lifting mechanism, which can drive the propulsion cylinder to adjust the height. Since the sealing test component is used to seal the inherent interface, the sealing test component can adapt to the insertion requirements of the fixed interface by adjusting the height, without changing the settings of the inherent interface, even if the size of the sensor housing and the inherent interface changes. This facilitates airtightness testing. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 A bottom view; Figure 3 This is a structural schematic diagram of the side plate and movable support assembly of this utility model; Figure 4 This is a schematic diagram of the bidirectional drive mechanism of this utility model; Figure 5 This is a schematic diagram of the sealing test component of this utility model.

[0018] The attached diagram is labeled as follows: 1. Workbench; 2. Double-acting lead screw; 3. Handwheel; 4. Moving seat; 5. Fixed plate; 6. Side plate; 7. Edge; 8. Baffle; 9. Guide seat; 10. Pull rod; 11. Wing bolt; 12. Sensor housing; 13. Inherent interface; 14. Lifting cylinder; 15. Pull plate; 16. Support rod; 17. Push cylinder; 18. Block rod; 19. Sealing cone sleeve; 20. Air tightness tester; 21. Balance block; 22. Smooth rod; 23. Air chamber; 24. Detection air pipe; 25. Air pump hose. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Combined with participation Figures 1-5 This utility model provides an airtightness testing device for a sensor housing, including a workbench 1, on which a bidirectional drive mechanism is provided. The top of the workbench 1 is provided with a telescopic groove. The bidirectional drive mechanism includes a bidirectional lead screw 2, which is rotatably connected in the telescopic groove. One end of the bidirectional lead screw 2 is fixedly connected to a handwheel 3. A pair of movable seats 4 are drivenly connected to the bidirectional lead screw 2, and the movable seats 4 are slidably connected in the telescopic groove. A pair of fixed plates 5 are provided on the bidirectional drive mechanism, and the fixed plates 5 are fixedly connected to the movable seats 4.

[0021] The workbench 1 can be installed at a designated test position. By manually controlling the handwheel 3 to rotate, the handwheel 3 can drive the bidirectional lead screw 2 to rotate. Under the action of the sliding guide of the telescopic groove, the threads at both ends of the bidirectional lead screw 2 with opposite directions can drive the pair of moving seats 4 to move closer or further apart. In this way, the pair of moving seats 4 can easily adjust the distance between the pair of fixed plates 5.

[0022] In this embodiment: a side plate 6 is fixedly connected to each fixed plate 5, a retaining edge 7 is fixedly connected to one end of the side plate 6, a baffle 8 is slidably connected to the other end of the side plate 6, a sensor housing 12 is provided between a pair of side plates 6, and a built-in interface 13 is provided on both sides of the sensor housing 12.

[0023] In this application, the sensor housing 12 is the sensor housing of an automotive flow sensor, model FS4003. The sensor housing 12 has a rectangular structure, and the inherent interfaces 13 on both sides are factory-installed. The pair of inherent interfaces 13 are connected, and the airtightness test is performed on the connected cavity area to detect whether there is air leakage through the cavity wall. The baffle 7 and baffle 8 are respectively set on the end of the side plate 6 and can be used to block the edge of the sensor housing 12. The pair of side plates 6 surround to form a rectangular structure. Since the sensor housing 12 has a rectangular structure, the sensor housing 12 can be stacked sequentially within the rectangular structure, which is convenient for loading and positioning.

[0024] In this embodiment: a movable support assembly is provided between the baffle 8 and the side plate 6. The movable support assembly includes a guide seat 9, which is fixedly connected to the side plate 6. A pull rod 10 is slidably connected to the guide seat 9. One end of the pull rod 10 is fixedly connected to the baffle 8. A wing bolt 11 is provided between the pull rod 10 and the guide seat 9.

[0025] In this application, the pull rod 10 has multiple through holes for positioning the wing bolts 11. The wing bolts 11 are threaded onto the guide seat 9. In use, by pulling the baffle 8 horizontally, the baffle 8 can slide on the side plate 6. After determining the position of the baffle 8, the wing bolts 11 can be threaded onto the guide seat 9 and inserted into one of the designated through holes. Since the longitudinal spacing of a pair of side plates 6 can be adjusted by a bidirectional drive mechanism, and the lateral spacing of the baffle 8 can be adjusted on the side plate 6, the rectangular space enclosed by the side plate 6, the flange 7, and the baffle 8 can be used for loading and positioning sensor housings 12 of different sizes.

[0026] It is worth noting that the inherent interface 13 currently provided on the sensor housing 12 is mainly located at the center of the side of the sensor housing 12. When the size of the sensor housing 12 and the inherent interface 13 changes, the location of the inherent interface 13 on the sensor housing 12 does not change.

[0027] In this embodiment: a balance block 21 is fixedly connected to the side plate 6, and a light rod 22 is slidably connected to the balance block 21. One end of the light rod 22 is fixedly connected to the baffle 8.

[0028] When the baffle 8 is slidably connected to the side plate 6, the baffle 8 can drive the light rod 22 to slide on the balance block 21, so that the side plate 6 can move more stably.

[0029] In this embodiment: a lifting mechanism is provided on the workbench 1, and a pair of propulsion cylinders 17 are provided on the lifting mechanism. The lifting mechanism includes a lifting cylinder 14, which is fixedly connected to the bottom of the workbench 1. A pull plate 15 is fixedly connected to the output end of the lifting cylinder 14, and a pair of support rods 16 are fixedly connected to the pull plate 15. One end of the support rod 16 passes through the workbench 1 and is fixedly connected to the propulsion cylinder 17.

[0030] The workbench 1 of this application has a groove through which the support rod 16 passes. By activating the piston extension and retraction of the lifting cylinder 14, the lifting cylinder 14 can move up and down in sequence through the pull plate 15 and the support rod 16. In this way, the push cylinder 17 on the support rod 16 can be height adjusted, and the push cylinder 17 can provide sealing power for the inherent interface 13.

[0031] In this embodiment: a sealing test assembly is provided at the opposite ends of a pair of propulsion cylinders 17. Each sealing test assembly includes a blocking rod 18. The blocking rod 18 is located at the output end of the propulsion cylinder 17. A sealing cone sleeve 19 is fixedly connected to the outer surface of the blocking rod 18. The sealing cone sleeve 19 is inserted into the inherent interface 13. The sealing test assembly is used to seal the inherent interface 13.

[0032] The sealing cone sleeve 19 is made of rubber. The plug rod 18 can increase the support of the sealing cone sleeve 19 with its conical structure. Under the lateral drive of the propulsion cylinder 17, the conical structure of the sealing cone sleeve 19 can be inserted into the inherent interface 13. While facilitating the sealing of the inherent interface 13, it can also increase the adaptability of the inherent interface 13 pipe sealing. One end of the plug rod 18 can be set at the output end of the propulsion cylinder 17 by means of thread or bolt connection. This makes it easy to disassemble and install the plug rod 18. When the sealing cone sleeve 19 cannot meet the sealing of the inherent interface 13, the detachable plug rod 18 can be used to easily change the type of sealing test component.

[0033] In this embodiment: an air tightness tester 20 is provided on the workbench 1. The air tightness tester 20 is connected to one of the sealing test components. An air chamber 23 is opened on one of the plug rods 18. A test air tube 24 communicating with the air chamber 23 is fixedly connected to the outer surface of one of the plug rods 18. The air tightness tester 20 is connected to the test air tube 24 through an air pump hose 25.

[0034] In this application, the airtightness tester 20 is used to fill the air chamber 23 with compressed air and measure the pressure change within the air chamber 23. The two ends of the detection air tube 24 can be detachably connected to the airtightness tester 20 and the detection air tube 24 respectively using existing quick-connect fittings. The basic principle of the airtightness tester 20 is to fill the object under test with compressed air and measure the internal pressure change to detect whether there is a leak. The airtightness tester can be obtained from existing technology, such as the D610M model sold by Suzhou Laihe Electronic Technology Co., Ltd.

[0035] In use, after a pair of sealing test components are inserted into the corresponding inherent interface 13 by the push cylinder 17 and the sealing is completed, the air tightness tester 20 can fill the air chamber 23 in the plug rod 18 with compressed gas through the air pump hose 25 and the test air pipe 24 in sequence. Since the pair of inherent interfaces 13 are connected, the air tightness test is performed on the connected cavity area. By measuring whether there is a change in pressure in the air chamber 23, it is possible to detect whether the sensor housing 12 leaks air through the cavity wall.

[0036] After the sensor housing 12 completes the airtightness test, the control propulsion cylinder 17 returns to its original position and pulls out the sensor housing 12 located at the bottom. In this way, multiple stacked sensor housings 12 can be automatically unloaded under the action of gravity, which facilitates subsequent rapid sealing tests.

[0037] The specific models and specifications of the propulsion cylinder 17, lifting cylinder 14, and airtightness detector 20 proposed in this application need to be selected and determined according to the actual specifications of the device. The specific selection calculation method, circuit connection method, and control method all adopt the existing technology in this field, and the power supply is also common knowledge in this field, so it will not be described in detail.

Claims

1. A sensor housing airtightness testing device, comprising a worktable (1), characterized in that: The workbench (1) is provided with a bidirectional drive mechanism, and a pair of fixed plates (5) are provided on the bidirectional drive mechanism. Each fixed plate (5) is fixedly connected with a side plate (6). One end of the side plate (6) is fixedly connected with a stop (7), and the other end of the side plate (6) is slidably connected with a baffle (8). A movable support assembly is provided between the baffle (8) and the side plate (6). A sensor housing (12) is provided between the pair of side plates (6). Both sides of the sensor housing (12) are provided with inherent interfaces (13). The workbench (1) is provided with a lifting mechanism, and the lifting mechanism is provided with a pair of propulsion cylinders (17). Each pair of propulsion cylinders (17) is provided with a sealing test component at its opposite end. The sealing test component is used to seal the inherent interface (13). The workbench (1) is provided with an airtightness tester (20), and the airtightness tester (20) is connected to one of the sealing test components.

2. The airtightness detection device for a sensor housing according to claim 1, characterized in that: The top of the workbench (1) is provided with a telescopic groove. The bidirectional drive mechanism includes a bidirectional lead screw (2). The bidirectional lead screw (2) is rotatably connected in the telescopic groove. A handwheel (3) is fixedly connected to one end of the bidirectional lead screw (2). A pair of movable seats (4) are drivenly connected to the bidirectional lead screw (2), and the movable seats (4) are slidably connected in the telescopic groove. The fixed plate (5) is fixedly connected to the movable seats (4).

3. The airtightness detection device for a sensor housing according to claim 1, characterized in that: The movable support assembly includes a guide seat (9), which is fixedly connected to the side plate (6). A pull rod (10) is slidably connected to the guide seat (9). One end of the pull rod (10) is fixedly connected to the baffle (8). A butterfly bolt (11) is provided between the pull rod (10) and the guide seat (9).

4. The airtightness detection device for a sensor housing according to claim 1, characterized in that: A balance block (21) is fixedly connected to the side plate (6), and a light rod (22) is slidably connected to the balance block (21). One end of the light rod (22) is fixedly connected to the baffle (8).

5. The airtightness detection device for a sensor housing according to claim 1, characterized in that: The lifting mechanism includes a lifting cylinder (14), which is fixedly connected to the bottom of the workbench (1). A pull plate (15) is fixedly connected to the output end of the lifting cylinder (14). A pair of support rods (16) are fixedly connected to the pull plate (15). One end of the support rod (16) passes through the workbench (1) and is fixedly connected to the propulsion cylinder (17).

6. The airtightness detection device for a sensor housing according to claim 1, characterized in that: Each plugging test assembly includes a plug rod (18) which is located at the output end of the propulsion cylinder (17). A sealing cone sleeve (19) is fixedly connected to the outer surface of the plug rod (18), and the sealing cone sleeve (19) is inserted into the inherent interface (13).

7. The airtightness detection device for a sensor housing according to claim 6, characterized in that: One of the plug rods (18) has an air chamber (23) and a detection air tube (24) connected to the air chamber (23) is fixedly connected to the outer surface of one of the plug rods (18). The air tightness tester (20) is connected to the detection air tube (24) through an air pump hose (25).

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