Large-scale cover flexible leakage test station

Abstract

The utility model discloses a large-scale cover flexible leakage test station, which comprises a detection table and a leakage test mechanism, the leakage test mechanism comprises a positioning block, a plugging mechanism, a group of positioning pieces and an airtight detector, the positioning block is fixedly arranged on the detection table, the outer contour of the positioning block is matched with the inner contour of a cover to be detected, and the sealing mechanism is arranged on the detection table. The cover cap to be detected is provided with a group of positioning holes along the edge of the cover cap to be detected at intervals, the positioning pieces are arranged along the edge of the positioning block at intervals and are in one-to-one correspondence with the positioning holes, the top of each positioning piece is pivotally provided with a pressing rod, and the pressing rods are in one-to-one correspondence with the positioning holes. The front end of the pressing rod extends into the positioning hole so as to limit the cover cap to be detected on the detection table; a sealing ring is arranged on the edge of the bottom of the to-be-detected cover cap to seal a gap between the to-be-detected cover cap and the detection table, the blocking mechanism blocks air holes in the side portion and the top of the to-be-detected cover cap, and a connecting air channel communicated with the airtightness detector is arranged in the positioning block to conduct leakage testing.

Description

Technical Field

[0001] This utility model relates to the technical field of leakage testing devices, and specifically to a large-scale flexible cover leakage testing station. Background Technology

[0002] The cylinder head cover of an automotive engine is used to seal the top of the engine. It is sealed to the outside of the cylinder head and cylinder block to protect the cylinder head system. During the production process, all vents of the engine cover need to be sealed before an airtightness test is performed to ensure that it meets the airtightness requirements. In the airtightness testing stage, the positioning stability of the product directly affects the leakage test results. However, the cover's shape is not regular, and how to position it properly is one of the challenges in cover leakage testing. On the other hand, leakage testing requires detection through the air circuit. Many existing methods involve venting after the cover is sealed, which significantly reduces the testing efficiency of the cover, especially for larger covers, where there is a waiting time each time air is vented.

[0003] Meanwhile, the engine hood also requires corresponding inserts such as nuts to be shipped together. Therefore, it is necessary to check for missing inserts and mark them after inspection to ensure the nuts are installed correctly. Currently, these processes are carried out sequentially in steps, which not only requires a large amount of manpower and leads to low efficiency, but also presents difficulties for large hoods due to their size. Each relocation requires repositioning, further exacerbating the efficiency limitations. Therefore, optimizing the production process of large hoods to improve production efficiency is an urgent problem to be solved. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a large-scale flexible cover leakage test station.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A large flexible cover leak testing station includes a testing platform and a leak testing mechanism. The leak testing mechanism includes a positioning block, a sealing mechanism, a set of positioning components, and an airtightness detector. The positioning block is fixed on the testing platform, and its outer contour matches the inner contour of the cover to be tested. The cover to be tested has a set of positioning holes spaced apart along its edge. A set of positioning components is spaced apart along the edge of the positioning block and corresponds one-to-one with the positioning holes. A pressure rod is pivotally mounted on the top of the positioning component, and the front end of the pressure rod extends into the positioning hole to confine the cover to be tested on the testing platform. A sealing ring is provided on the bottom edge of the cover to be tested to seal the gap between it and the testing platform. The sealing mechanism seals the air holes on the side and top of the cover to be tested. The positioning block has a built-in connecting air passage that communicates with the airtightness detector to perform leak testing.

[0007] Preferably, the positioning component further includes a cylinder, a fixed support rod, and a movable support rod. The fixed support rod is vertically fixed to the top of the cylinder. One end of the movable support rod is pivotally connected to the top of the fixed support rod, and the other end is pivotally connected to the middle part of the pressure rod. The tail end of the pressure rod is pivotally connected to the cylinder head of the cylinder. The cylinder drives the pressure rod to pivot relative to the positioning hole by the vertical movement of the cylinder head, so that its front end extends into the positioning hole.

[0008] Preferably, a positioning bolt is fixed at the front end of the pressure rod, the head of the positioning bolt is adapted to the positioning hole, the testing platform is provided with a through hole that matches the positioning hole, a washer is placed in the through hole, and the head of the positioning bolt extends into the through hole until it abuts against the washer.

[0009] Preferably, the top of the fixed support rod has a beveled surface on the side opposite to the pressure rod.

[0010] Preferably, the testing platform is provided with a connecting hole that allows the pressure rod, fixed support rod and movable support rod to extend out, and the top surface of the cylinder is fixed to the bottom of the connecting hole by a connecting screw.

[0011] Preferably, a set of eccentric positioning posts are spaced apart along the edge of the positioning block on the testing platform. The set of eccentric positioning posts abut against the outer wall of the cover to be tested by eccentric rotation, so as to jointly define the position of the cover to be tested.

[0012] Preferably, the sealing mechanism includes a side sealing head, a horizontal cylinder, a top sealing head, and a lifting cylinder. The side sealing head is directly opposite the side air port of the cover to be tested and is driven by the horizontal cylinder to seal the side air port. A slide rail is provided on the testing platform, and a first sliding bracket mounted on the slide rail and positioned above the positioning block is slidably mounted on the slide rail. The top sealing head is located at the bottom of the lifting cylinder, which is mounted on the first sliding bracket. The first sliding bracket slides to make the top sealing head directly opposite the top air port of the cover to be tested, and the lifting cylinder drives the top sealing head to seal the top air port.

[0013] Preferably, it also includes an insert detection mechanism, which includes a sensor, a second lifting cylinder and a detection head connected in sequence from top to bottom. A second sliding bracket mounted on the slide rail and positioned above the positioning block is slidably disposed on the slide rail. The second lifting cylinder is vertically disposed on the second sliding bracket and drives the detection head to move relative to the top of the cover to be tested in order to detect the insert on the top of the cover to be tested.

[0014] Preferably, it also includes a marking machine, which is fixed to the side of the testing table, and the side of the testing table is provided with a notch that allows the side of the cover to be tested to be exposed.

[0015] Preferably, it also includes a positioning detector, which is fixed on the detection platform for detecting the placement of the cover to be tested.

[0016] The beneficial effects of this utility model are mainly reflected in:

[0017] 1. Set up a positioning block that matches the inner contour of the cover to be tested to fill the interior of the cover to be tested, so as to reduce the area that needs to be ventilated, greatly shorten the ventilation time, and improve the testing efficiency; set up a set of positioning components to form a positioning structure that matches the outer contour of the cover to be tested, so as to adapt to the large cover structure while simplifying the positioning structure, so as to facilitate the placement of the cover and ensure the positioning stability of the cover.

[0018] 2. Set up a set of eccentric positioning pins to adjust the front-back and left-right positions of the cover to be tested by rotation positioning, so as to facilitate the positioning of the positioning components.

[0019] 3. The top sealing head and the insert detection mechanism are slidably set on the slide rails to maximize the use of the slide rail structure. On the one hand, it is convenient to avoid misalignment and place the cover to be tested. On the other hand, it is convenient for the top sealing head and the insert detection mechanism to slide above the cover to be tested for detection.

[0020] 4. By utilizing the frame structure of the testing station, an insert testing mechanism and a marking machine are set up to effectively concentrate different processes on the same testing station. This allows the cover to be tested to undergo three processes in sequence on the same testing station without having to change positions, thereby maximizing the optimization of the production process, improving production cycle time, and achieving the goal of improving production efficiency. Attached Figure Description

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0022] Figure 1 : Schematic diagram of an embodiment of this utility model;

[0023] Figure 2 : A partial top view of an embodiment of this utility model;

[0024] Figure 3 : A partial schematic diagram from another angle of an embodiment of this utility model;

[0025] Figure 4 : A schematic diagram of the positioning component in an embodiment of this utility model;

[0026] Figure 5 : Partial structural schematic diagram of an embodiment of this utility model. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0028] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for ease of description and simplification. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0029] like Figures 1 to 5As shown, this utility model discloses a large flexible cover leakage testing station, including a testing platform 1 and a leakage testing mechanism. The leakage testing mechanism includes a positioning block 2, a sealing mechanism, a set of positioning elements 3, and an airtightness detector. The positioning block 2 is fixed on the testing platform 1, and its outer contour matches the inner contour of the cover 100 to be tested. The cover 100 to be tested has a set of positioning holes 101 spaced along its edge. The set of positioning elements 3 is spaced along the edge of the positioning block 2 and corresponds one-to-one with the positioning holes 101. The positioning member 3 is pivotally provided with a pressure rod 301 at its top. The front end of the pressure rod 301 extends into the positioning hole 101 to constrain the cover 100 to be tested onto the testing platform 1. A sealing ring is provided at the bottom edge of the cover 100 to seal the gap between it and the testing platform 1. The sealing mechanism seals the air holes on the side and top of the cover 100. The positioning block 2 has a built-in connecting air passage that communicates with the airtightness tester (not shown in the figure) for leakage testing. The bottom edge of the cover 100 has a groove to embed the sealing ring (not shown in the figure) for sealing purposes.

[0030] This solution sets up a positioning block 2 that matches the inner contour of the cover 100 to fill the interior of the cover 100, thereby reducing the area that needs to be ventilated inside the cover 100, greatly shortening the ventilation time, and improving the testing efficiency; a set of positioning components 3 is set up to form a positioning structure that matches the outer contour of the cover 100, so as to adapt to large cover structures while simplifying the positioning structure, so as to facilitate the placement of the cover 100 and ensure the positioning stability of the cover 100.

[0031] Specifically, such as Figure 2 , Figure 4As shown, the positioning component 3 also includes a cylinder 302, a fixed support rod 303, and a movable support rod 304. The fixed support rod 303 is vertically fixed to the top of the cylinder 302. One end of the movable support rod 304 is pivotally connected to the top of the fixed support rod 303, and the other end is pivotally connected to the middle part of the pressure rod 301. The tail end of the pressure rod 301 is pivotally connected to the cylinder head of the cylinder 302. The cylinder 302 drives the pressure rod 301 to pivot relative to the positioning hole 101 by the vertical movement of the cylinder head, so that its front end extends into the positioning hole 101. This structure allows the pressure rod 301 to move in a lever motion with its front and rear ends moving up and down in opposite directions. On the other hand, the movable support rod 304 allows the pressure rod 301 to pivot relative to the fixed support rod 303. This allows the front end of the pressure rod 301 to move vertically relative to the positioning hole 101 and horizontally relative to the positioning hole 101. This ensures that when the front end of the pressure rod 301 is raised, it can move away from the positioning block 2, thus ensuring that the cover 100 to be tested has sufficient space to be placed on the positioning block 2.

[0032] Preferably, the top of the fixed support rod 303 has a chamfered surface 306 on the side opposite to the pressure rod 301. The slope of the chamfered surface 306 is preferably adapted to the side angle of the pressure rod 301 when it pivots, so as to avoid obstructing the pivoting of the pressure rod 301.

[0033] Furthermore, a positioning bolt 305 is fixed to the front end of the pressure rod 301. The positioning bolt 305 is perpendicular to the pressure rod 301, with its shank passing through the front end of the pressure rod 301 and its head protruding outward from the pressure rod 301. The head of the positioning bolt 305 is adapted to the positioning hole 101. The testing platform 1 is provided with a through hole 102 that matches the positioning hole 101. A washer 103 is placed inside the through hole 102, and the head of the positioning bolt 305 extends into the through hole 102 until it abuts against the washer 103. The pressure rod 301 and the positioning bolt 305 are detachably connected, so that the pressure rod 301 can be adapted to different positioning holes 101 or different covers to be tested by replacing the positioning bolts 305 of different specifications. The washer 103 acts as a buffer to prevent the head of the positioning bolt 305 from making hard contact with the testing platform 1 after being pressed down.

[0034] The testing platform 1 is provided with a connecting hole 104 that allows the pressure rod 301, the fixed support rod 303 and the movable support rod 304 to extend out. The top surface of the cylinder 302 is fixed to the bottom of the connecting hole 104 by connecting screws.

[0035] A set of eccentric positioning posts 307 are spaced apart along the edge of the positioning block 2 on the testing platform 1. The set of eccentric positioning posts 307 abuts against the outer wall of the cover 100 to be tested by eccentric rotation, thereby jointly defining the position of the cover 100 to be tested. The eccentric positioning posts 307 can be used to position and adjust the front-back, left-right position of the cover 100 to be tested by eccentric rotation, so that the positioning hole 101 and the through hole 102 are aligned, making it easier to position the positioning component 3.

[0036] The sealing mechanism includes a side sealing head 401, a horizontal cylinder, a top sealing head 402, and a lifting cylinder 403. Specifically, the testing platform 1 is provided with a second connecting hole, the side sealing head 401 extends from the second connecting hole on the testing platform 1 and faces the side air port of the cover 100 to be tested, the horizontal cylinder is located at the bottom of the second connecting hole and connected to the side sealing head 401 to drive the side sealing head 401 to seal the side air port.

[0037] The testing platform 1 is provided with a slide rail 5, and a first sliding bracket 501 mounted on the slide rail 5 and positioned above the positioning block 2 is slidably mounted on the slide rail 5. The top sealing head 402 is located at the bottom of the lifting cylinder 403, which is mounted on the first sliding bracket 501. The first sliding bracket 501 slides so that the top sealing head 402 is directly opposite the top air port of the cover 100 to be tested. The lifting cylinder 403 drives the top sealing head 402 to seal the top air port.

[0038] Furthermore, the system also includes an insert detection mechanism, which comprises a sensor 601, a second lifting cylinder 602, and a detection head 603 connected sequentially from top to bottom. A second sliding bracket 502, mounted above the positioning block 2, is slidably mounted on the slide rail 5. The second lifting cylinder 602 is vertically mounted on the second sliding bracket 502 and drives the detection head 603 to move relative to the top of the cover 100 under test to detect whether an insert is installed on the top of the cover 100. The sensor 601 is preferably a height detector. The distance between the top of the cover 100 under test, where the insert is installed, and the detection head 603 is set as a predetermined distance. The system determines whether an insert is installed on the top of the cover 100 under test by comparing the downward movement distance of the detection head 603 with the predetermined distance. The insert detection mechanism and the top sealing head 402 jointly utilize the slide rail 5, maximizing the use of the slide rail structure. On the one hand, this facilitates positioning and placement of the cover 100 to be tested; on the other hand, it allows the top sealing head 402 and the insert detection mechanism to slide above the cover 100 for testing, simplifying the overall structure of the equipment and increasing production cycle time to improve production efficiency. Both the insert detection mechanism and the top sealing head 402 are driven by a motor or cylinder (not shown in the figure) to move along the slide rail 5.

[0039] Furthermore, the system also includes a marking machine 7, which is fixed to the side of the inspection table 1. The side of the inspection table 1 has a notch 105 that exposes the side of the cover 100 to be tested. The port of the marking machine 7 moves into the notch 105 to mark the side of the cover 100 to be tested. By utilizing the frame structure of the inspection table 1 and setting up the insert inspection mechanism and the marking machine 7, different processes are effectively concentrated on the same inspection table 1. This allows the cover 100 to undergo three sequential processes on the same inspection table 1 without changing the position of the cover 100, maximizing the optimization of the production process, improving production cycle time, and achieving the goal of improving production efficiency.

[0040] In addition, it also includes a positioning detector 8, which is fixed on the detection table 1 to detect whether the cover 100 to be tested is placed or not.

[0041] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A large-scale flexible cover leakage testing station, characterized in that: The system includes a testing platform (1) and a leak testing mechanism. The leak testing mechanism includes a positioning block (2), a sealing mechanism, a set of positioning elements (3), and an airtightness detector. The positioning block (2) is fixed on the testing platform (1), and its outer contour matches the inner contour of the cover (100) to be tested. The cover (100) to be tested has a set of positioning holes (101) spaced along its edge. A set of positioning elements (3) is spaced along the edge of the positioning block (2) and corresponds one-to-one with the positioning holes (101). 3) A pressure rod (301) is pivotally provided on the top of the device. The front end of the pressure rod (301) extends into the positioning hole (101) to limit the cover to be tested (100) on the test table (1). A sealing ring is provided on the bottom edge of the cover to be tested (100) to seal the gap between it and the test table (1). The sealing mechanism seals the air holes on the side and top of the cover to be tested (100). The positioning block (2) has a built-in connecting air passage connected to the air tightness tester to perform leakage testing.

2. The large-scale flexible cover leakage test station according to claim 1, characterized in that: The positioning component (3) also includes a cylinder (302), a fixed support rod (303), and a movable support rod (304). The fixed support rod (303) is vertically fixed to the top of the cylinder (302). One end of the movable support rod (304) is pivotally connected to the top of the fixed support rod (303), and the other end is pivotally connected to the middle part of the pressure rod (301). The tail end of the pressure rod (301) is pivotally connected to the cylinder head of the cylinder (302). The cylinder (302) drives the pressure rod (301) to pivot relative to the positioning hole (101) by the vertical movement of the cylinder head, so that its front end extends into the positioning hole (101).

3. The large-scale flexible cover leakage test station according to claim 2, characterized in that: A positioning bolt (305) is fixed at the front end of the pressure rod (301). The head of the positioning bolt (305) is adapted to the positioning hole (101). The testing table (1) is provided with a through hole (102) that matches the positioning hole (101). A washer (103) is built into the through hole (102). The head of the positioning bolt (305) extends into the through hole (102) until it abuts against the washer (103).

4. The large-scale flexible cover leakage test station according to claim 3, characterized in that: The top of the fixed support rod (303) has a beveled surface (306) on the side opposite to the pressure rod (301).

5. The large-scale flexible cover leakage test station according to claim 4, characterized in that: The testing platform (1) is provided with a connecting hole (104) that allows the pressure rod (301), fixed support rod (303) and movable support rod (304) to extend out. The top surface of the cylinder (302) is fixed to the bottom of the connecting hole (104) by connecting screws.

6. The large-scale flexible cover leakage test station according to claim 5, characterized in that: A set of eccentric positioning posts (307) are provided at intervals along the edge of the positioning block (2) on the testing platform (1). The set of eccentric positioning posts (307) abut against the outer wall of the cover to be tested (100) by eccentric rotation, so as to jointly define the position of the cover to be tested (100).

7. The large-scale flexible cover leakage test station according to any one of claims 1-6, characterized in that: The sealing mechanism includes a side sealing head (401), a horizontal cylinder, a top sealing head (402), and a lifting cylinder (403). The side sealing head (401) is directly opposite the side air port of the cover to be tested (100) and is driven by the horizontal cylinder to seal the side air port. A slide rail (5) is provided on the testing platform (1). A first sliding bracket (501) is slidably mounted on the slide rail (5) above the positioning block (2). The top sealing head (402) is located at the bottom of the lifting cylinder (403). The lifting cylinder is located on the first sliding bracket (501). The first sliding bracket (501) slides so that the top sealing head (402) is directly opposite the top air port of the cover to be tested (100). The lifting cylinder (403) drives the top sealing head (402) to seal the top air port.

8. The large-scale flexible cover leakage test station according to claim 7, characterized in that: It also includes an insert detection mechanism, which includes a sensor (601), a second lifting cylinder (602) and a detection head (603) connected from top to bottom. A second sliding bracket (502) is slidably mounted on the slide rail (5) above the positioning block (2). The second lifting cylinder (602) is vertically mounted on the second sliding bracket (502) and drives the detection head (603) to move relative to the top of the cover (100) to detect the insert on the top of the cover (100).

9. The large-scale flexible cover leakage test station according to claim 8, characterized in that: It also includes a marking machine (7), which is fixed to the side of the testing table (1), and the side of the testing table (1) is provided with a notch (105) that allows the side of the cover (100) to be tested to be exposed.

10. The large-scale flexible cover leakage test station according to claim 9, characterized in that: It also includes a positioning detector (8), which is fixed on the testing table (1) for detecting the placement of the cover (100) to be tested.

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