An air tightness detection apparatus

Abstract

This utility model relates to the field of testing tooling technology, specifically to an airtightness testing device. It includes a cantilever mounted on a work platform, with a dual-axis cylinder connected to the end of the cantilever. The output end of the dual-axis cylinder is connected to an upper mold base. The lower side of the upper mold base is provided with a retractable reset guide post and a spring guide post, both extending along the axial direction. The spring guide post is located in the lower center of the upper mold base, and an upper mold is located at the tail of the spring guide post. The upper mold and the spring guide post are movably connected. The reset guide posts are distributed on both sides of the spring guide post. The testing device also includes a lower mold base and a cylinder, both mounted on the work platform. The cylinder is located on one side of the lower mold base to drive the lower mold base to move on the work platform. Addressing the hard contact problem in currently used airtightness testing devices, this invention improves the device structure by utilizing the movable cooperation between the spring guide post and the lower mold, ensuring elastic contact between the lower mold and the product under test, thus reducing damage to the product from hard contact during airtightness testing.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, and in particular to an airtightness testing device. Background Technology

[0002] Existing technologies often employ airtightness testing equipment when testing products. Compressed air is introduced into the product through an air source interface, and sensors monitor pressure changes to read data and determine the extent of leakage.

[0003] However, during the use of existing equipment, it has been found that because the product appearance is often not flat, when the testing equipment moves towards the product, the mold base of the existing equipment has no buffer structure when it comes into contact with the product, resulting in hard contact and damage to the product. In view of this, there is an urgent need to improve the structure of the airtightness testing equipment to reduce the damage caused by the unevenness of the product appearance during the testing process. Utility Model Content

[0004] The purpose of this invention is to provide an airtightness testing device to improve the hard contact problem caused by unevenness of the product under test during the airtightness testing process, and at the same time improve the product positioning stability during the testing process.

[0005] To achieve the above objectives, this utility model provides an airtightness testing device, including a cantilever mounted on a working platform. A dual-axis cylinder is connected to the end of the cantilever, and the output end of the dual-axis cylinder is connected to an upper mold base. The lower side of the upper mold base is provided with a retractable reset guide post and a spring guide post. The spring guide post is located in the lower middle part of the upper mold base, and an upper mold is provided at the tail of the spring guide post. The upper mold and the spring guide post are movably connected and connected to an external air source to inflate the product to be tested. The reset guide post is distributed on both sides of the spring guide post. The testing equipment also includes a lower mold base and a cylinder. Both the lower mold base and the cylinder are mounted on the working platform. The cylinder is located on one side of the lower mold base to drive the lower mold base to move on the working platform.

[0006] The airtightness testing equipment of this application, in its non-operating state, places and fixes the product to be tested on the lower mold base. The cylinder is activated, driving the lower mold base carrying the product to be tested to move below the upper mold base. The dual-axis cylinder is then activated, and its output end drives the upper mold base to move. The upper mold below the upper mold base moves towards the product to be tested. After the upper mold contacts the product to be tested, it undergoes relative displacement with the spring guide post until it aligns with the product to be tested. When the reset guide post contacts an uneven part of the product to be tested, it also adaptively expands and contracts, ensuring that the product to be tested maintains an elastic contact state with the lower mold and the reset guide post. After the upper mold is aligned, an external air source inflates the product to be tested, and the airtightness of the product to be tested can be determined based on the change in air pressure.

[0007] The upper mold base includes a stacked connecting plate and an upper template. The connecting plate is located above the upper template, and hand-tightening bolts are provided at the four corners of the upper surface of the connecting plate. The distance between the connecting plate and the upper template is adjusted by the hand-tightening bolts.

[0008] The connecting plate is connected to the output end of the dual-axis cylinder, and under the drive of the dual-axis cylinder, it moves the upper template together. The distance between the upper template and the connecting plate is adjusted by the hand-tightening bolt.

[0009] The spring guide post includes a column fixed below the upper template. A spring and a washer are fitted around the column. The two ends of the spring abut against the upper template and the washer, respectively. The column passes through the washer and penetrates the upper template. A limiting ring is also fixed at the end of the column to prevent the column from detaching from the upper template.

[0010] By utilizing the movable fit between the spring guide post and the lower mold, the externally provided spring can continuously apply force to the upper mold. Adjusting the distance between the connecting plate and the upper mold plate can change the compression of the spring, thereby changing the force applied to the product to be tested. The greater the compression of the spring, the greater the pressure applied by the upper mold to the product to be tested. This method is suitable for products with low surface flatness. The washer is mainly used to allow the spring to abut.

[0011] The reset guide post includes a column segment and an abutment head. The column segment is fixedly connected to the upper template. The column segment has an inner cavity for accommodating the abutment head. A reset spring is provided between the column segment and the abutment head. The abutment head moves within the inner cavity through the reset spring.

[0012] The relative movement between the column segment and the contact head is generated by the return spring. After the contact head contacts the product to be tested, the contact head extends and retracts within the inner cavity, which can avoid hard contact with the product to be tested.

[0013] The upper mold has an air inlet head connected to an external air source, and the lower surface of the upper mold has a receiving cavity that is adapted to the product to be tested.

[0014] The air inlet is connected to an external air source, and the receiving cavity is used to adapt to the product under test for inflating the product under test.

[0015] The upper mold base is provided with a limiting guide post and a long guide post below it. The tail of the limiting guide post is hemispherical, and the tail of the long guide post is connected with a bolt.

[0016] The limiting guide post is mainly used to limit the distance between the upper mold base and the lower mold base. Its tail is hemispherical and is inserted into the lower mold base to confirm that the lower mold base is directly below the upper mold base. The bolt connected to the tail of the long guide post is used to dock with the lower mold base.

[0017] The lower mold base includes a lower template and a base plate stacked together. The lower template is disposed on the base plate, and the base plate is connected to a side plate with an opening at the edge. The side plate is connected to the output end of the cylinder through the opening.

[0018] The lower template is mainly used to load the product to be tested, and the base plate is used to dock with the output end of the cylinder, so that the lower mold base can move under the action of the cylinder.

[0019] The lower template has a mold base and a mounting base on its upper surface. The mold base has several positioning blocks distributed on it to position the product to be tested. The mounting base is distributed at the four corners of the lower template and has holes and slots.

[0020] The positioning block is set on the mold base according to the external structure of the product to be tested, so that the product to be tested can be placed in the positioning block during assembly line operation. The mounting base is set on the lower template and the hole and groove are opened to adapt to the limiting guide post.

[0021] The base plate is provided with a slider, a track and a lifting plate on its underside. The track is laid on the working platform. The slider is fixedly connected to the base plate and slides on the track. The lifting plate is set on one side of the base plate to support and fix the other end of the tank chain, which is placed on the working platform.

[0022] The slider cooperates with the track and moves along the track under the action of the cylinder. The lifting plate is equipped with a tank chain, which is mainly used to protect the internal cables.

[0023] This utility model relates to an airtightness testing device. Addressing the hard contact problem in currently used airtightness testing devices, the device structure is improved by utilizing the movable cooperation between the spring guide post and the lower mold, ensuring elastic contact between the lower mold and the product under test, thus reducing damage to the product during airtightness testing. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the product to be tested by the airtightness testing equipment of this utility model.

[0026] Figure 2 This is a schematic diagram of the overall structure of an airtightness testing device according to this utility model.

[0027] Figure 3 This is a schematic diagram of the fit between the upper mold base and the lower mold base of an airtightness testing device according to this utility model.

[0028] Figure 4 This is a bottom view of the upper mold base of an airtightness testing device according to this utility model.

[0029] Figure 5 This is a cross-sectional structural schematic diagram of the reset guide post of an airtightness testing device according to this utility model.

[0030] Figure 6 This is an isometric structural diagram of the lower mold base of an airtightness testing device according to this utility model.

[0031] Figure 7 This is a bottom view of the lower mold base of an airtightness testing device according to this utility model.

[0032] 1. Cantilever; 2. Dual-axis cylinder; 3. Upper mold base; 4. Reset guide post; 5. Spring guide post; 6. Upper mold; 7. Lower mold base; 8. Cylinder; 9. Tank chain; 31. Connecting plate; 32. Upper template; 33. Hand-tightening bolt; 34. Limiting guide post; 35. Long guide post; 41. Column section; 42. Contact head; 43. Inner cavity; 44. Reset spring; 51. Column body; 52. Spring; 53. Washer; 54. Restricting ring; 61. Air inlet; 62. Receiving cavity; 71. Lower template; 72. Base plate; 73. Side plate; 74. Opening; 75. Mold base; 76. Mounting base; 77. Positioning block; 78. Hole and slot; 721. Slider; 722. Rail; 723. Lifting plate. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] Please see Figures 2 to 5 This utility model provides an airtightness testing device, which is installed on a working platform. The device includes a cantilever 1 mounted on a work platform, with a dual-axis cylinder 2 connected to the end of the cantilever 1. The output end of the dual-axis cylinder 2 is connected to an upper mold base 3. The lower side of the upper mold base 3 is provided with a reset guide post 4 that can extend and retract along the axial direction and a spring guide post 5. The spring guide post 5 is located in the lower middle part of the upper mold base 3. The tail of the spring guide post 5 is provided with an upper mold 6. The upper mold 6 is movably connected to the spring guide post 5 and is connected to an external air source to inflate the product to be tested. The reset guide post 4 is distributed on both sides of the spring guide post 5. The testing equipment also includes a lower mold base 7 and a cylinder 8. Both the lower mold base 7 and the cylinder 8 are mounted on the working platform. The cylinder 8 is located on one side of the lower mold base 7 to drive the lower mold base 7 to move on the working platform.

[0035] In this embodiment, the cantilever 1 has a 7-shaped structure. The product to be tested is placed on the lower mold base 7. The cylinder 8 is activated, causing the lower mold base 7 to move below the upper mold base 3. The dual-axis cylinder 2 is activated, driving the upper mold 6 to move towards the product to be tested. The upper mold 6, which first contacts the product to be tested, will move on the spring guide post 5 to avoid hard contact. The reset guide post 4 can extend and retract along the axial direction to adapt to products to be tested with different surfaces. It also has a certain auxiliary function to prevent the product to be tested from moving. The output end of the cylinder 8 is connected to the lower mold base 7 to drive the lower mold base 7 to move along the track on the working platform.

[0036] Furthermore, the upper mold base 3 includes a stacked connecting plate 31 and an upper template 32. The connecting plate 31 is located above the upper template 32. Hand-tightening bolts 33 are provided at the four corners of the upper surface of the connecting plate 31. The distance between the connecting plate 31 and the upper template 32 is adjusted by the hand-tightening bolts 33.

[0037] The hand-tightening bolt 33 adjusts the distance between the connecting plate 31 and the upper template 32, mainly to change the compression of the spring 52 after contacting the product to be tested, thereby adapting to different types of products to be tested.

[0038] Furthermore, the spring guide post 5 includes a post 51 fixed below the upper template 32. A spring 52 and a washer 53 are fitted over the post 51. The two ends of the spring 52 abut against the upper template 32 and the washer 53, respectively. The post 51 passes through the washer 53 and penetrates the upper mold 6. A limiting ring 54 is also fixed at the end of the post 51 to restrict the post 51 from detaching from the upper mold 6.

[0039] In this embodiment, the compression of the spring 52 mainly depends on the distance between the upper mold 6 and the upper template 32. After the upper mold 6 contacts the product to be tested, it can apply a force to the spring 52. After the spring 52 is compressed, it will generate a vertical force on the product to be tested. That is, after adapting to the external characteristics of the product to be tested, it will apply a force to the product to be tested to improve the placement stability of the product to be tested.

[0040] Furthermore, the reset guide post 4 includes a column segment 41 and an abutment head 42. The column segment 41 is fixedly connected to the upper template 32. The column segment 41 is provided with an inner cavity 43 to accommodate the abutment head 42. A reset spring 44 is provided between the column segment 41 and the abutment head 42. The abutment head 42 moves within the inner cavity 43 through the reset spring 44.

[0041] The contact head 42 is retractable within the inner cavity 43. In conjunction with the return spring 44, the contact head 42 can apply a vertical force to the product to be tested without causing hard contact.

[0042] Furthermore, an air inlet 61 is provided on the upper part of the upper mold 6, the air inlet 61 is connected to an external air source, and a receiving cavity 62 is provided on the lower surface of the upper mold 6, the receiving cavity 62 being adapted to the product to be tested.

[0043] After the air inlet 61 is connected to an external air source, it is inflated to verify the airtightness of the product under test. The receiving cavity 62 is used to receive the product under test. In this embodiment, it is used as follows: Figure 1 The instrument shown is the product under test. The instrument has a protruding connector portion, which is used to connect to the receiving cavity 62 for subsequent inflation.

[0044] Furthermore, a limiting guide post 34 and a long guide post 35 are provided below the upper mold base 3. The tail of the limiting guide post 34 is hemispherical, and the tail of the long guide post 35 is connected with a bolt.

[0045] The limiting guide post 34 and the long guide post 35 are mainly used to limit the distance between the upper template 32 and the lower mold base 7. At the same time, the limiting guide post 34 also has the function of confirming that the upper template 32 and the lower mold base 7 are aligned.

[0046] Furthermore, the lower mold base 7 includes a lower template 71 and a base plate 72 stacked together. The lower template 71 is disposed on the base plate 72. The base plate 72 is connected to a side plate 73 with an opening 74 at the edge. The side plate 73 is connected to the output end of the cylinder 8 through the opening 74.

[0047] Please see Figure 6 and Figure 7 The lower template 71 is used to place the product to be tested, and the base plate 72 is provided with the side plate 73 so that the cylinder 8 can drive the lower mold base 7 to move on the work platform to the work station where the product to be tested is placed and the work station where air tightness testing is performed.

[0048] Furthermore, the upper surface of the lower template 71 is provided with a mold base 75 and a mounting base 76. The mold base 75 is provided with a plurality of positioning blocks 77, which are distributed on the mold base 75 to position the product to be tested. The mounting base 76 is distributed at the four corners of the lower template 71 and has holes and slots 78.

[0049] In this embodiment, the mold base 75 places the product to be tested through the positioning block 77, and the slot 78 is provided to mate with the limiting guide post 34. The insertion of the limiting guide post 34 into the slot 78 indicates that the lower mold base 7 has moved into place.

[0050] Furthermore, the lower side of the base plate 72 is also provided with a slider 721, a track 722 and a lifting plate 723. The track 722 is laid on the working platform. The slider 721 is fixedly connected to the base plate 72 and slides on the track 722. The lifting plate 723 is arranged on one side of the base plate 72 to support and fix the other end of the tank chain 9, which is placed on the working platform.

[0051] The slider 721 moves along the track 722 under the action of the cylinder 8, while the lifting plate 723 is mainly used to support the tank chain 9. The tank chain 9 is equipped with a wire harness and is mainly used to protect the wire harness and prevent it from being worn by contact with the outside during periodic movement.

[0052] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. An airtightness testing device, characterized in that, The device includes a cantilever (1) mounted on a working platform. A dual-axis cylinder (2) is connected to the end of the cantilever (1). The output end of the dual-axis cylinder (2) is connected to an upper mold base (3). The lower side of the upper mold base (3) is provided with a reset guide post (4) that can extend and retract along the axial direction and a spring guide post (5). The spring guide post (5) is located in the lower middle part of the upper mold base (3). The tail of the spring guide post (5) is provided with an upper mold (6). The upper mold (6) is movably connected to the spring guide post (5) and is connected to an external air source to inflate the product to be tested. The reset guide post (4) is distributed on both sides of the spring guide post (5). The testing equipment also includes a lower mold base (7) and a cylinder (8). The lower mold base (7) and the cylinder (8) are both set on the working platform. The cylinder (8) is set on one side of the lower mold base (7) to drive the lower mold base (7) to move on the working platform.

2. The airtightness testing device as described in claim 1, characterized in that, The upper mold base (3) includes a connecting plate (31) and an upper template (32) stacked together. The connecting plate (31) is located above the upper template (32). The upper surface of the connecting plate (31) is provided with hand-tightening bolts (33) at the four corners. The distance between the connecting plate (31) and the upper template (32) is adjusted by the hand-tightening bolts (33).

3. The airtightness testing device as described in claim 2, characterized in that, The spring guide post (5) includes a post (51) fixed below the upper template (32). The post (51) is fitted with a spring (52) and a washer (53). The two ends of the spring (52) abut against the upper template (32) and the washer (53) respectively. The post (51) passes through the washer (53) and penetrates the upper mold (6). The end of the post (51) is also fixed with a limiting ring (54) to restrict the post (51) from leaving the upper mold (6).

4. The airtightness testing device as described in claim 2, characterized in that, The reset guide post (4) includes a column segment (41) and an abutment head (42). The column segment (41) is fixedly connected to the upper template (32). The column segment (41) has an inner cavity (43) for accommodating the abutment head (42). A reset spring (44) is provided between the column segment (41) and the abutment head (42). The abutment head (42) moves within the inner cavity (43) through the reset spring (44).

5. The airtightness testing device as described in claim 1, characterized in that, The upper mold (6) is provided with an air inlet (61) connected to an external air source. The lower surface of the upper mold (6) is provided with a receiving cavity (62) adapted to the product to be tested.

6. The airtightness testing device as described in claim 1, characterized in that, The upper mold base (3) is also provided with a limiting guide post (34) and a long guide post (35) below it. The tail of the limiting guide post (34) is hemispherical, and the tail of the long guide post (35) is connected with a bolt.

7. The airtightness testing device as described in claim 1, characterized in that, The lower mold base (7) includes a stacked lower template (71) and a base plate (72). The lower template (71) is disposed on the base plate (72). The base plate (72) is connected to a side plate (73) with an opening (74) at its edge. The side plate (73) is connected to the output end of the cylinder (8) through the opening (74).

8. The airtightness testing device as described in claim 7, characterized in that, The upper surface of the lower template (71) is provided with a mold base (75) and a mounting base (76). The mold base (75) is provided with a plurality of positioning blocks (77). The plurality of positioning blocks (77) are distributed on the mold base (75) to position the product to be tested. The mounting base (76) is distributed at the four corners of the lower template (71) and has holes and slots (78).

9. The airtightness testing device as described in claim 8, characterized in that, The base plate (72) is also provided with a slider (721), a track (722) and a lifting plate (723) on the underside. The track (722) is laid on the working platform. The slider (721) is fixedly connected to the base plate (72) and slides on the track (722). The lifting plate (723) is set on one side of the base plate (72) to support and fix the other end of the tank chain (9) that is placed on the working platform.

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