A leak detection fixture for automotive parts

Abstract

The utility model discloses a kind of leak hunting fixtures for automobile parts, for clamping to be measured product, the inside of this to be measured product has to be measured cavity, the side of to be measured product has the first side wall and second side wall connected, first side wall is equipped with first side opening, the bottom edge of second side wall has outwardly extending bend, and the spacing between first side opening and second side wall is less than the width of bend;Leak hunting fixture includes bottom base plate and first side plugging mechanism;Its characterized in that: first side plugging mechanism includes fixed seat;Slip seat, install on fixed seat;Second plugging head;First driving part, for driving second plugging head left and right moves between plugging position and intermediate position;And second driving part, for driving second plugging head moves back and forth with slip seat between initial position and intermediate position.Compared with prior art, the utility model is convenient to the plugging of side opening and does not interfere with to be measured product.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a leak detection fixture for automotive parts. Background Technology

[0002] Sealing performance testing of automotive parts is a crucial step in the automotive manufacturing process. Before conducting airtightness testing on the product under test, it is necessary to seal the openings or holes connecting the test chamber to the outside using a leak test fixture. For details, please refer to Chinese Patent Application No. CN202323665046.9, "A Leak Test Fixture for Automotive Parts".

[0003] Different leak testing fixtures need to be designed for different products to be tested. For example... Figure 1 and Figure 2 As shown, the product under test 10 is an automotive electronic control box. The interior of the product under test 10 has a test cavity 100. The side of the product under test 10 has a connected first side wall 104 and a second side wall 105. The first side wall 104 and the second side wall 105 are arranged perpendicular to the left-right direction and the front-back direction, respectively. A first side opening 1041 is provided on the first side wall 104. The bottom edge of the second side wall 105 has an outwardly extending curved edge 1051, and the distance D between the first side opening 1041 and the second side wall 105 is less than the width W of the curved edge 1051.

[0004] Therefore, for the product under test 10, if a conventional sealing mechanism is directly used to seal the first side opening 1041 when designing the leak test fixture, the following problem will occur: during the loading and unloading of the product under test 10 onto the bottom substrate, the sealing mechanism is prone to interference with the bent edge 1051 of the second side wall 105. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a leak testing fixture for automotive parts that is convenient for sealing side openings and does not interfere with the product under test, in light of the current state of the technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a leak testing fixture for automotive parts, used to clamp the product to be tested. The product to be tested has a cavity to be tested inside. The side of the product to be tested has a first side wall and a second side wall connected to each other. The first side wall and the second side wall are arranged perpendicular to the left-right direction and the front-back direction, respectively. A first side opening is provided on the first side wall. The bottom edge of the second side wall has an outwardly extending bend. The distance between the first side opening and the second side wall is less than the width of the bend.

[0007] The leak detection fixture includes:

[0008] A bottom substrate for mounting the product under test; and

[0009] The first side sealing mechanism is installed on the bottom substrate and is used to seal the first side opening;

[0010] Its characteristic is that: the first side sealing mechanism includes...

[0011] A mounting base is installed on the bottom substrate.

[0012] The sliding seat can be slidably mounted on the fixed seat;

[0013] The second sealing head is used to seal the first side opening;

[0014] A first driving component, mounted on the sliding seat, is used to drive the second sealing head to move left and right between the sealing position and the intermediate position; and

[0015] The second driving component is mounted on the fixed base and is used to drive the second sealing head to move back and forth between the initial position and the intermediate position with the sliding base.

[0016] When the second sealing head is in its initial position, the second sealing head does not overlap with the orthographic projection of the bend on the horizontal plane.

[0017] In order to achieve stable sliding of the sliding seat on the fixed seat, the fixed seat has a guide rail extending in the front-back direction, and the sliding seat has a groove extending in the front-back direction and cooperating with the guide rail.

[0018] To ensure the sealing effect, a third sealing ring is provided on the end face of the second sealing head, which is used to abut against the surface of the first side wall located on the outer periphery of the first side opening.

[0019] To prevent gas from leaking out through the bottom and top openings of the product under test during the airtightness test, the bottom and top of the product under test are respectively provided with bottom openings and top openings that communicate with the cavity under test.

[0020] The leak detection fixture also includes

[0021] The top substrate is located directly above the bottom substrate and can move up and down relative to the bottom substrate;

[0022] A bottom sealing mechanism, mounted on the bottom substrate, is used to seal the bottom opening; and

[0023] A top sealing mechanism is installed on the top substrate to seal the top opening.

[0024] To seal the bottom opening, the bottom sealing mechanism includes:

[0025] A first cover plate is installed on the bottom substrate to cover the bottom opening;

[0026] A first filling block, disposed on the top wall of the first cover plate, is used to fill the lower cavity of the cavity to be tested; and

[0027] The first sealing ring is disposed on the top wall of the first cover plate and surrounds the outer periphery of the first filling block, for abutting against the bottom wall of the product to be tested located on the outer periphery of the bottom opening.

[0028] To prevent gas from leaking out through the top opening of the product under test during the airtightness test, the top of the product under test also has a top opening that communicates with the cavity under test, and the top sealing mechanism is also used to seal the top opening.

[0029] To seal the bottom opening and the top opening, the top sealing mechanism includes:

[0030] The second cover plate, suspended from the bottom of the top substrate, is used to cover the top opening;

[0031] The second filling block is disposed on the bottom wall of the second cover plate and is used to fill the upper cavity of the cavity to be tested;

[0032] A second sealing ring is disposed on the bottom wall of the second cover plate and surrounds the outer periphery of the second filling block, for abutting against the top wall of the product to be tested located at the outer periphery of the top opening; and

[0033] The first sealing head is suspended at the bottom of the top substrate and is used to seal the top opening.

[0034] To prevent gas from leaking out through other side openings of the product under test during the airtightness test, the side of the product under test also has multiple second side openings that communicate with the cavity under test.

[0035] The leak detection fixture also includes multiple second side sealing mechanisms corresponding to the second side openings. Each of the second side sealing mechanisms is mounted on the bottom substrate and is used to seal the corresponding second side opening.

[0036] In order to seal each of the second side openings, each of the second side sealing mechanisms includes a third sealing head for sealing the corresponding second side opening and a third driving member for driving the third sealing head to translate.

[0037] To facilitate the mounting of the product under test on the bottom substrate, the product under test has positioning holes arranged vertically through both the left and right sides.

[0038] The leak testing fixture further includes a positioning mechanism for positioning the product under test. This positioning mechanism is mounted on the bottom substrate and includes...

[0039] The first positioning block is used to limit the position of the front side of the product under test;

[0040] The second positioning block is used to limit the position to the rear side of the product under test;

[0041] The third positioning block is used to limit the position to the right side of the product under test;

[0042] Two positioning pins are arranged at a distance from each other on the left and right, corresponding to the positioning holes, and each positioning pin is used to be inserted into the corresponding positioning hole;

[0043] A clamping head, used to clamp the left side of the product to be tested; and

[0044] The fourth driving component is used to drive the pressing head to translate.

[0045] Compared with the prior art, the advantages of this utility model are as follows: the first side sealing mechanism is composed of a fixed seat, a sliding seat, a second sealing head, a first driving member and a second driving member, which can realize the reciprocating movement of the second sealing head between the initial position, the intermediate position and the sealing position. On the one hand, it can realize the sealing of the first side opening. On the other hand, since the second sealing head does not overlap with the orthographic projection of the bend on the horizontal plane when the second sealing head is in the initial position, it can avoid interference between the product under test and the second sealing head during loading and unloading. Attached Figure Description

[0046] Figure 1 This is a three-dimensional structural diagram of the product to be tested clamped in an embodiment of the leak testing fixture for automotive parts according to this utility model.

[0047] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure from another direction;

[0048] Figure 3 This is a three-dimensional structural diagram of the leak testing fixture for automotive parts according to an embodiment of the present invention after the product to be tested has been sealed.

[0049] Figure 4 for Figure 3 The three-dimensional structural diagram of the second side sealing mechanism, which is located near the first side sealing mechanism, is omitted.

[0050] Figure 5for Figure 3 A three-dimensional structural diagram of the bottom substrate, bottom sealing mechanism, first side sealing mechanism, second side sealing mechanism and positioning mechanism before loading the product to be tested;

[0051] Figure 6 for Figure 5 A three-dimensional structural diagram of the first side sealing mechanism;

[0052] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure from another direction;

[0053] Figure 8 for Figure 3 A three-dimensional structural diagram of the top substrate and the top sealing mechanism. Detailed Implementation

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0055] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0056] like Figures 1 to 8 The image shows a preferred embodiment of the leak testing fixture for automotive parts according to this utility model. This leak testing fixture is used to clamp the product 10 to be tested.

[0057] In this embodiment, as Figure 1 and Figure 2As shown, the product under test 10 has a cavity 100 inside; the bottom of the product under test 10 has a bottom opening 101 that communicates with the cavity 100; the top of the product under test 10 has a top opening 102 and a top aperture 103 that communicate with the cavity 100; the side of the product under test 10 has a first sidewall 104 and a second sidewall 105 connected to each other, the first sidewall 104 and the second sidewall 105 being arranged perpendicular to the left-right direction and the front-back direction, respectively. The first side wall 104 has a first side opening 1041, and the bottom edge of the second side wall 105 has an outwardly extending bend 1051, and the distance D between the first side opening 1041 and the second side wall 105 is less than the width W of the bend 1051; the side wall of the product to be tested 10 also has six second side openings 106 that are connected to the cavity 100 to be tested; both the left and right sides of the product to be tested have positioning holes 107 arranged vertically.

[0058] In this embodiment, as Figures 3 to 8 As shown, the leak detection fixture includes a bottom substrate 1, a top substrate 2, a bottom sealing mechanism 3, a top sealing mechanism 4, a first side sealing mechanism 5, a second side sealing mechanism 6, and a positioning mechanism 7.

[0059] The bottom substrate 1 is used to mount the product to be tested 10.

[0060] The top substrate 2 is located directly above the bottom substrate 1 and can move up and down relative to the bottom substrate 1.

[0061] The bottom sealing mechanism 3 is mounted on the bottom base plate 1 to seal the bottom opening 101. In this embodiment, as shown... Figure 5 As shown, the bottom sealing mechanism 3 includes a first cover plate 31, a first filling block 32, and a first sealing ring 33. Specifically, the first cover plate 31 is laid flat on the surface of the bottom substrate 1 to cover the bottom opening 101; the first filling block 32 is disposed on the top wall of the first cover plate 31 to fill the lower cavity of the cavity to be tested 100; the first sealing ring 33 is embedded in the top wall of the first cover plate 31 and surrounds the outer periphery of the first filling block 32 to abut against the bottom wall of the product to be tested 10 located on the outer periphery of the bottom opening 101.

[0062] The top sealing mechanism 4 is mounted on the top substrate 2 to seal the top opening 102 and the top aperture 103. In this embodiment, as shown... Figure 8As shown, the top sealing mechanism 4 includes a second cover plate 41, a second filling block 42, a second sealing ring 43, and a first sealing head 44. Specifically, the second cover plate 41 is suspended at the bottom of the top substrate 2 to cover the top opening 102; the second filling block 42 is disposed on the bottom wall of the second cover plate 41 to fill the upper cavity of the cavity to be tested 100; the second sealing ring 43 is embedded in the bottom wall of the second cover plate 41 and surrounds the outer periphery of the second filling block 42 to abut against the top wall of the product to be tested 10 located on the outer periphery of the top opening 102; the first sealing head 44 is suspended at the bottom of the top substrate 2 to seal the top opening 103.

[0063] The first side sealing mechanism 5 is mounted on the bottom substrate 1 to seal the aforementioned first side opening 1041. In this embodiment, as shown... Figure 6 and Figure 7 As shown, the first side sealing mechanism 5 includes a fixed base 51, a sliding base 52, a second sealing head 53, a first driving member 54, and a second driving member 55. Specifically, the fixed base 51 is mounted on the bottom base plate 1, and the fixed base 51 has a guide rail 511 extending in the front-rear direction; the sliding base 52 has a sliding groove 521 extending in the front-rear direction and cooperating with the guide rail 511, thereby realizing the stable sliding of the sliding base 52 on the fixed base 51; the second sealing head 53 is used to seal the first side opening 1041, and a third sealing ring 531 is embedded on the end face of the second sealing head 53 for abutting against the surface of the first side wall 104 located on the outer periphery of the first side opening 1041; the first driving member 54... 4 is a cylinder, mounted on the sliding seat 52, and its power output end is connected to the second sealing head 53 to drive the second sealing head 53 to move left and right between the sealing position and the intermediate position; the second driving member 55 is a cylinder, mounted on the fixed seat 51, and its power output end is connected to the sliding seat 52 to drive the second sealing head 53 to move back and forth with the sliding seat 52 between the initial position and the intermediate position; when the second sealing head 53 is in the initial position, the second sealing head 53 does not overlap with the orthographic projection of the aforementioned bend 1051 on the horizontal plane.

[0064] The number of second side sealing mechanisms 6 is six, and they correspond one-to-one with the aforementioned second side openings 106. Each second side sealing mechanism 6 is mounted on the bottom substrate 1 and is used to seal the corresponding second side opening 106. In this embodiment, as shown... Figure 5 As shown, each second side sealing mechanism 6 includes a third sealing head 61 and a third driving member 62. Specifically, the third sealing head 61 is used to seal the corresponding second side opening 106; the third driving member 62 is a cylinder, which is installed on the bottom base plate 1 or the first cover plate 31, and its power output end is connected to the corresponding third sealing head 61 to drive the third sealing head 61 to translate.

[0065] The positioning mechanism 7 is mounted on the bottom substrate 1 and is used to position the product 10 to be tested. In this embodiment, the positioning mechanism 7 includes a first positioning block 71, a second positioning block 72, a third positioning block 73, a positioning pin 74, a clamping head 75, and a fourth driving member 76. Specifically, the first positioning block 71 is installed on the front side of the first cover plate 31 to limit the product under test 10 to the front side; the second positioning block 72 is installed on the rear side of the first cover plate 31 to limit the product under test 10 to the rear side; the third positioning block 73 is installed on the right side of the first cover plate 31 to limit the product under test 10 to the right side; there are two positioning pins 74, which are arranged on the first cover plate 31 at intervals and correspond one-to-one with the positioning holes 107. Each positioning pin 74 is used to insert into the corresponding positioning hole 107; the clamping head 75 is used to clamp the product under test 10 to the left side; the fourth driving member 76 is a cylinder, which is installed on the left side of the bottom base plate 1. Its power output end is connected to the clamping head 75 to drive the clamping head 75 to move.

[0066] The working principle of this embodiment is as follows:

[0067] (1) When it is necessary to perform an airtightness test on the product 10 to be tested:

[0068] First, align the two positioning holes 107 of the product under test 10 with the two positioning pins 74 on the first cover plate 31 and insert them into place so that the product under test 10 is limited between the first positioning block 71, the second positioning block 72 and the third positioning block 73. Then, start the fourth driving component 76 to drive the pressing head 75 to move towards the product under test 10 until it is pressed against the left side of the product under test 10, thereby completing the loading of the product under test 10.

[0069] Next, the top substrate 2 is driven to descend by an external lifting mechanism (not shown in the figure) until the product under test 10 is clamped between the first cover plate 31 and the second cover plate 32. At this time, the first sealing ring 33 abuts against the bottom wall of the product under test 10 located on the outer periphery of the bottom opening 101, and the second sealing ring 43 abuts against the top wall of the product under test 10 located on the outer periphery of the top opening 102, thereby sealing the bottom opening 101 and the top opening 102 respectively. At the same time, the first sealing head 44 seals the top opening 103.

[0070] Then, the second driving component 55 is activated to drive the sliding seat 52 to move toward the product under test, so that the second sealing head 53 moves from the initial position to the middle position. Then, the first driving component 54 is activated to drive the second sealing head 53 to move from the middle position to the sealing position, thereby sealing the first side opening 1041. At the same time, each third driving component 62 is activated to drive the corresponding third sealing head 61 to move toward the corresponding second side opening 106 until the third sealing head 61 seals the corresponding second side opening 106. Thus, the sealing of each opening and hole of the product under test is completed.

[0071] Finally, the airtightness of the product under test 10 was tested using an external leak detection device (not shown in the figure).

[0072] (2) After the test:

[0073] The first driving component 54 and the second driving component 55 are activated in sequence to reset the second sealing head 53 to its initial position; at the same time, the third driving components 62 are activated to drive the corresponding third sealing head 61 to reset, so as to avoid interference with it during the subsequent loading and unloading of the product under test 10.

[0074] Then, the top substrate 2 is reset via an external lifting mechanism;

[0075] Then the fourth drive component 76 drives the clamping head 75 to reset;

[0076] Finally, remove the tested product 10 from the top after the test is completed.

Claims

1. A leak testing fixture for automotive parts, used to clamp a product to be tested (10), the product to be tested (10) having a cavity to be tested (100) inside, the side of the product to be tested (10) having a first sidewall (104) and a second sidewall (105) connected to each other, the first sidewall (104) and the second sidewall (105) being arranged perpendicular to the left-right direction and the front-back direction respectively, the first sidewall (104) having a first side opening (1041), the second sidewall (105) having an outwardly extending bent edge (1051) at the bottom edge, and the distance between the first side opening (1041) and the second sidewall (105) being less than the width of the bent edge (1051); The leak detection fixture includes: Bottom substrate (1) is used to mount the product under test (10); as well as The first side sealing mechanism (5) is installed on the bottom substrate (1) and is used to seal the first side opening (1041); Its characteristic is that: the first side sealing mechanism (5) includes: A mounting base (51) is installed on the bottom base plate (1); The sliding seat (52) is slidably mounted on the fixed seat (51); The second sealing head (53) is used to seal the first side opening (1041); A first driving element (54), mounted on the sliding seat (52), is used to drive the second sealing head (53) to move left and right between the sealing position and the intermediate position; and The second driving member (55) is installed on the fixed base (51) and is used to drive the second sealing head (53) to move back and forth between the initial position and the intermediate position with the sliding base (52); When the second sealing head (53) is in its initial position, the second sealing head (53) does not overlap with the orthographic projection of the bend (1051) on the horizontal plane.

2. The leak detection fixture according to claim 1, characterized in that: The fixed base (51) has a guide rail (511) extending in the front-back direction, and the sliding base (52) has a groove (521) extending in the front-back direction and cooperating with the guide rail (511).

3. The leak detection fixture according to claim 1, characterized in that: The end face of the second sealing head (53) is provided with a third sealing ring (531) for abutting against the surface of the first side wall (104) located on the outer periphery of the first side opening (1041).

4. The leak detection fixture according to claim 1, characterized in that: The product under test (10) has a bottom opening (101) and a top opening (102) that communicate with the cavity under test (100), respectively. The leak detection fixture also includes The top substrate (2) is located directly above the bottom substrate (1) and can move up and down relative to the bottom substrate (1); Bottom sealing mechanism (3) is installed on the bottom base plate (1) and is used to seal the bottom opening (101); as well as A top sealing mechanism (4) is installed on the top substrate (2) to seal the top opening (102).

5. The leak detection fixture according to claim 4, characterized in that: The bottom sealing mechanism (3) includes a first cover plate (31) mounted on the bottom base plate (1) for covering the bottom opening (101); A first filling block (32) is disposed on the top wall of the first cover plate (31) for filling the lower cavity of the cavity to be tested (100); and The first sealing ring (33) is disposed on the top wall of the first cover plate (31) and surrounds the outer periphery of the first filling block (32) for abutting against the bottom wall of the product to be tested (10) located on the outer periphery of the bottom opening (101).

6. The leak detection fixture according to claim 4, characterized in that: The top of the product to be tested (10) also has a top opening (103) that communicates with the cavity to be tested (100), and the top sealing mechanism (4) is also used to seal the top opening (103).

7. The leak detection fixture according to claim 6, characterized in that: The top sealing mechanism (4) includes a second cover plate (41) suspended at the bottom of the top substrate (2) to cover the top opening (102); The second filling block (42) is disposed on the bottom wall of the second cover plate (41) and is used to fill the upper cavity of the cavity to be tested (100); The second sealing ring (43) is disposed on the bottom wall of the second cover plate (41) and surrounds the outer periphery of the second filling block (42) for abutting against the top wall of the product to be tested (10) located on the outer periphery of the top opening (102); as well as The first sealing head (44) is suspended at the bottom of the top substrate (2) to seal the top opening (103).

8. The leak detection fixture according to claim 1, characterized in that: The side of the product to be tested (10) also has a plurality of second side openings (106) that communicate with the cavity to be tested (100); The leak detection fixture also includes a plurality of second side sealing mechanisms (6) corresponding to the second side opening (106). Each of the second side sealing mechanisms (6) is mounted on the bottom base plate (1) and is used to seal the corresponding second side opening (106).

9. The leak detection fixture according to claim 8, characterized in that: Each of the second side sealing mechanisms (6) includes a third sealing head (61) for sealing the corresponding second side opening (106) and a third driving member (62) for driving the third sealing head (61) to translate.

10. The leak detection clamp according to any one of claims 1 to 9, characterized in that: The product under test (10) has positioning holes (107) arranged vertically on both the left and right sides; The leak testing fixture further includes a positioning mechanism (7) for positioning the product under test (10). This positioning mechanism (7) is mounted on the bottom substrate (1) and includes... The first positioning block (71) is used to limit the position of the product under test (10) to the front side; The second positioning block (72) is used to limit the position of the product under test (10) to the rear side; The third positioning block (73) is used to limit the position to the right side of the product under test (10); Two positioning pins (74) are arranged at a distance from each other on the left and right, corresponding to the positioning holes (107), and each positioning pin (74) is used to be inserted into the corresponding positioning hole (107); A clamping head (75) is used to clamp the left side of the product to be tested (10); as well as The fourth drive element (76) is used to drive the clamping head (75) to translate.

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