Engine cylinder cover air tightness detection device

Abstract

The utility model provides a transmitter cylinder cover airtightness detection device, which relates to the technical field of airtightness detection devices, and comprises a workbench, a top plate, a support frame and a pressure-bearing seat, the top of the support frame is provided with a fixing mechanism, the bottom of the workbench is provided with a lifting mechanism, and a sealing mechanism is arranged between the pressure-bearing seat and the workbench. A gas transmission mechanism is arranged at the bottom of the top plate; the first air pump conveys air into the air bag through the breather pipe, the air bag is blown by the air to swell, so that the air bag wraps the bottom of the engine cylinder cover, the first air pump stops conveying the air and closes the valve to block the bottom of the engine cylinder cover, and after the engine cylinder cover is detected, the first air pump stops conveying the air and closes the valve to seal the bottom of the engine cylinder cover. The plunger is pulled out of the vent hole, air flows out of the air bag, the air bag shrinks and is separated from the bottom of the engine cylinder cover, and the problem that in the prior art, air is hidden in a groove body of an automobile cylinder cover, and detection work of workers is disturbed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection devices, in particular to an air tightness detection device for a transmitter cylinder head. Background Art

[0002] The cylinder head is a structure for sealing the engine. The sealing performance of the cylinder head directly affects the use safety performance of the engine. Before the cylinder head is assembled to the engine, it is necessary to detect its air tightness. Before the detection, the holes on the surface of the engine cylinder head need to be blocked with sealing plugs, and one hole is reserved for air intake detection;

[0003] There are still some deficiencies in the application of the existing air tightness detection technology for automobile cylinder heads. It is easily interfered by air. Since there are many grooves on the surface of the automobile cylinder head and air is hidden in the grooves, during the air tightness detection of the automobile cylinder head, the air in the grooves flows out under the action of pressure and generates bubbles, which will interfere with the detection work of the staff. Therefore, the utility model proposes an air tightness detection device for a transmitter cylinder head to solve the above problems. Content of the Utility Model

[0004] In view of the above problems, the utility model proposes an air tightness detection device for a transmitter cylinder head to solve the problem that air is hidden in the grooves of the existing automobile cylinder head, thus interfering with the detection work of the staff.

[0005] To achieve the purpose of the utility model, the utility model is realized through the following technical solutions: an air tightness detection device for a transmitter cylinder head, including a workbench, a top plate, a support frame and a pressure-bearing seat. The top plate is fixedly connected to the top of the workbench. On both sides inside the workbench, support frames are symmetrically and fixedly connected. A fixing mechanism is arranged on the top of the support frame. A lifting mechanism is arranged at the bottom of the workbench. The top of the lifting mechanism is fixedly connected to the pressure-bearing seat. A sealing mechanism is arranged between the pressure-bearing seat and the workbench. An air delivery mechanism is arranged at the bottom of the top plate.

[0006] Further improvement lies in that: the sealing mechanism includes an airbag, a plunger, a first air pump and an air pipe. An airbag is fixedly connected inside the pressure-bearing seat. The first air pump is fixedly connected to the right side inside the workbench. The output end of the first air pump is communicated with one side of the airbag through the air pipe. An air vent is arranged on one side of the airbag, and a plunger is clamped inside the air vent. The material of the airbag is set as rubber.

[0007] Further improvement lies in that: the shape of the airbag is set as a square structure with a hole in the middle. The type of the air pipe is set as a telescopic pipe. The top end of the airbag is fitted with the bottom of the engine cylinder head.

[0008] A further improvement is made in that: the fixing mechanism includes a sliding rod, a clamping block and a first cylinder, the top of the two support frames is fixedly connected to the first cylinder, and the two sides of the top of the two support frames are symmetrically slidably connected to the sliding rod, one end of the sliding rod is fixedly connected to the clamping block, and the output end of the first cylinder is fixedly connected to one side of the clamping block.

[0009] Further improvements are made in the following aspects: The lifting mechanism includes a base frame, a hinge rod, a top frame, a connecting shaft, and a second cylinder. The bottom of the workbench is fixedly connected to the bottom end, and a top frame is provided above the base frame. The base frame and the top frame are symmetrically hinged to each other on both sides. Adjacent sets of hinge rods form an X-shaped structure and are hinged to each other through the connecting shaft. The base frame and the top frame are symmetrically provided with sliding grooves on both sides. One end of the hinge rod is slidably connected to the inside of the sliding groove. A second cylinder is hinged to one side of the base frame. The output end of the second cylinder is hinged to the outer wall of the connecting shaft. The top of the top frame is fixedly connected to the bottom of the pressure seat.

[0010] A further improvement is made in that: a second air pump is fixedly installed at the bottom of the top plate, the output end of the second air pump is connected to an air supply pipe, and one end of the air supply pipe is connected to a jet nozzle.

[0011] A further improvement is that: one end of the jet head is provided with a sealing cap, a pressure sensor is provided on the outside of the jet head, and multiple sealing heads can be placed on the top of the top plate.

[0012] The beneficial effects of this utility model are as follows: The No. 1 air pump delivers gas into the airbag through the vent pipe, and the gas blows the airbag to inflate it, so that the airbag wraps around the bottom of the engine cylinder head. The No. 1 air pump stops delivering gas and closes the valve to seal the bottom of the engine cylinder head. After the engine cylinder head inspection is completed, the No. 1 air pump pulls the plunger out of the vent hole, and the gas flows out of the airbag. The airbag contracts and separates from the bottom of the engine cylinder head, thus solving the problem in the prior art that air is trapped in the cylinder head groove, which interferes with the inspection work of the staff. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention;

[0014] Figure 2 This is a schematic diagram of the internal structure of the workbench of this utility model;

[0015] Figure 3 This is a schematic diagram of the lifting mechanism of this utility model.

[0016] The components are as follows: 1. Workbench; 2. Top plate; 3. Support frame; 4. Pressure seat; 5. Airbag; 6. Plunger; 7. No. 1 air pump; 8. Vent pipe; 9. Sliding rod; 10. Clamping block; 11. No. 1 cylinder; 12. No. 2 air pump; 13. Air supply pipe; 14. Jet nozzle; 15. Fixing clip; 16. Bottom frame; 17. Hinge rod; 18. Top frame; 19. Connecting shaft; 20. Slide groove; 21. No. 2 cylinder. Detailed Implementation

[0017] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0018] according to Figure 1 , 2 As shown in Figure 3, this embodiment proposes an engine cylinder head airtightness testing device, including a workbench 1, a top plate 2, a support frame 3, and a pressure seat 4. The top plate 2 is fixedly connected to the top of the workbench 1, and the support frame 3 is symmetrically fixedly connected to both sides inside the workbench 1. The top of the support frame 3 is provided with a fixing mechanism, and the bottom of the workbench 1 is provided with a lifting mechanism. The top of the lifting mechanism is fixedly connected to the pressure seat 4, and a sealing mechanism is provided between the pressure seat 4 and the workbench 1. The bottom of the top plate 2 is provided with an air supply mechanism. The engine cylinder head is fixed to the top of the support frame 3 by the fixing mechanism. Then, the lifting mechanism is activated to move the pressure seat 4 upward, so that the sealing mechanism fits against the bottom of the engine cylinder head to seal the bottom of the engine cylinder head. Then, all the vent holes on the engine cylinder head are sealed, leaving one air inlet. The air supply mechanism is inserted into the air inlet to supply air into the engine cylinder head, and the air pressure inside the engine cylinder head is observed to see if it is normal.

[0019] The fixing mechanism includes a sliding rod 9, a clamping block 10, and a first cylinder 11. The first cylinder 11 is fixedly connected to the top of the two support frames 3, and the sliding rod 9 is symmetrically slidably connected to both sides of the top of the two support frames 3. The clamping block 10 is fixedly connected to one end of the sliding rod 9. The output end of the first cylinder 11 is fixedly connected to one side of the clamping block 10. When the engine cylinder head is placed in the middle of the two clamping blocks 10, the output ends of the two first cylinders 11 can drive the two clamping blocks 10 to move simultaneously to both sides of the engine cylinder head, so as to clamp the two sides of the engine cylinder head through the clamping blocks 10, thereby fixing the engine cylinder head to the top of the workbench 1. After the test is completed, the output end of the first cylinder 11 can drive the clamping block 10 to separate from the engine cylinder head, and the engine cylinder head can be removed from the top of the workbench 1.

[0020] The lifting mechanism includes a base frame 16, hinge rods 17, a top frame 18, a connecting shaft 19, and a second cylinder 21. The base frame 16 is fixedly connected to the bottom of the worktable 1. A top frame 18 is located above the base frame 16. Hinges 17 are symmetrically hinged to both sides of the base frame 16 and the top frame 18, forming an X-shape between adjacent sets of hinge rods 17, which are hinged together via the connecting shaft 19. Slide grooves 20 are symmetrically provided on both sides of the interior of the base frame 16 and the top frame 18. One end of each hinge rod 17 is slidably connected to the interior of the slide groove 20. A second cylinder 21 is hinged to one side of the base frame 16. The output end of the cylinder 21 is hinged to the outer wall of the connecting shaft 19. The top of the top frame 18 is fixedly connected to the bottom of the pressure seat 4. The output end of the second cylinder 21 is connected to the hinge rod 17 through the connecting shaft 19. The extension and retraction of the output end of the second cylinder 21 can drive the hinge rod 17 to rotate forward and backward around the connecting shaft 19. The top frame 18 can be lifted and lowered through the hinge rod 17. One end of the hinge rod 17 can slide linearly back and forth inside the slide groove 20 to counteract the interference between the hinge rod 17 and the bottom frame 16 and the top frame 18. The pressure seat 4 is connected to the top frame 18 as a whole, and the distance between the pressure seat 4 and the bottom of the engine cylinder head can be adjusted.

[0021] The sealing mechanism includes an airbag 5, a plunger 6, a primary air pump 7, and a vent pipe 8. The airbag 5 is fixedly connected inside the pressure-bearing seat 4. The primary air pump 7 is fixedly connected to the right side of the workbench 1. The output end of the primary air pump 7 is connected to one side of the airbag 5 via the vent pipe 8. A vent hole is provided on one side of the airbag 5, and the plunger 6 is engaged inside the vent hole. The airbag 5 is made of rubber and has a U-shaped structure. The vent pipe 8 is a telescopic tube. The top of the airbag 5 is attached to the bottom of the engine cylinder head. The first air pump 7 delivers gas to the inside of the airbag 5 through the vent pipe 8. The gas blows the airbag 5 to inflate it, so that the airbag 5 wraps around the bottom of the engine cylinder head. The first air pump 7 stops delivering gas and closes the valve to seal the bottom of the engine cylinder head. After the engine cylinder head is inspected, the first air pump 7 pulls the plunger 6 out of the vent hole. Gas flows out of the airbag 5. The airbag 5 contracts and separates from the bottom of the engine cylinder head. Then the plunger 6 is locked back into the vent hole.

[0022] A second air pump 12 is fixedly installed at the bottom of the top plate 2. The output end of the second air pump 12 is connected to an air supply pipe 13. One end of the air supply pipe 13 is connected to a jet nozzle 14. One end of the jet nozzle 14 is equipped with a sealing cap. A pressure sensor is provided on the outside of the jet nozzle 14. Multiple sealing heads can be placed on the top of the top plate 2. After the airbag 5 seals the bottom of the engine cylinder head, all the vent holes on the engine cylinder head are sealed with sealing heads, leaving one inflation hole. The jet nozzle 14 is inserted into the vent hole, and the inflation hole is sealed with the sealing cap. The second air pump 12 delivers gas into the interior of the jet nozzle 14 through the air supply pipe 13. The jet nozzle 14 delivers gas into the sealed interior of the engine cylinder head. The pressure sensor can measure the change in air pressure in the space to determine whether the object being tested is leaking air.

[0023] The engine cylinder head airtightness testing device uses a primary air pump 7 to deliver gas into the airbag 5 through a vent pipe 8. The gas inflates the airbag 5, causing it to completely enclose the bottom of the engine cylinder head. The primary air pump 7 then stops delivering gas and closes the valve to seal the bottom of the engine cylinder head. After the engine cylinder head test is completed, the primary air pump 7 pulls the plunger 6 out of the vent hole, allowing gas to flow out of the airbag 5. The airbag 5 then contracts and separates from the bottom of the engine cylinder head, thus solving the problem in existing technologies where air trapped in the cylinder head housing interferes with the testing work.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for testing the air tightness of a generator cylinder head, comprising a workbench (1), a top plate (2), a support frame (3), and a pressure seat (4), characterized in that: The top of the workbench (1) is fixedly connected with a top plate (2). On both sides inside the workbench (1), support frames (3) are symmetrically and fixedly connected. A fixing mechanism is provided at the top of the support frames (3). A lifting mechanism is provided at the bottom of the workbench (1). The top of the lifting mechanism is fixedly connected with a pressure-bearing seat (4). A sealing mechanism is provided between the pressure-bearing seat (4) and the workbench (1). An air delivery mechanism is provided at the bottom of the top plate (2). The sealing mechanism includes an airbag (5), a plunger (6), a first air pump (7), and an air vent pipe (8). An airbag (5) is fixedly connected inside the pressure-bearing seat (4). A first air pump (7) is fixedly connected to the right side inside the workbench (1). The output end of the first air pump (7) is connected to one side of the airbag (5) through the air vent pipe (8). A vent hole is provided on one side of the airbag (5), and a plunger (6) is clamped inside the vent hole. The material of the airbag (5) is set as rubber.

2. The generator cylinder head airtightness testing device according to claim 1, characterized in that: The shape of the airbag (5) is set as a figure-eight structure. The type of the air vent pipe (8) is set as a telescopic pipe. The top end of the airbag (5) is fitted with the bottom of the engine cylinder head.

3. The generator cylinder head airtightness testing device according to claim 1, characterized in that: The fixing mechanism includes a sliding rod (9), a clamping block (10), and a first cylinder (11). A first cylinder (11) is fixedly connected to the top of the two support frames (3). On both sides of the top of the two support frames (3), sliding rods (9) are symmetrically and slidably connected. One end of the sliding rod (9) is fixedly connected with a clamping block (10). The output end of the first cylinder (11) is fixedly connected with one side of the clamping block (10).

4. The generator cylinder head airtightness testing device according to claim 1, characterized in that: The lifting mechanism includes a bottom frame (16), articulated rods (17), a top frame (18), a connecting shaft (19), and a second cylinder (21). The bottom end inside the workbench (1) is fixedly connected with a bottom frame (16). A top frame (18) is provided above the bottom frame (16). Articulated rods (17) are symmetrically articulated on both sides of the bottom frame (16) and the top frame (18). A group of adjacent articulated rods (17) presents an X-shaped structure and is articulated with each other through a connecting shaft (19). Chutes (20) are symmetrically provided on both sides inside the bottom frame (16) and the top frame (18). One end of the articulated rod (17) is slidably connected with the inside of the chute (20). One side of the bottom frame (16) is articulated with a second cylinder (21). The output end of the second cylinder (21) is articulated with the outer wall of the connecting shaft (19). The top of the top frame (18) is fixedly connected with the bottom of the pressure-bearing seat (4).

5. The generator cylinder head airtightness testing device according to claim 1, characterized in that: A second air pump (12) is fixedly installed at the bottom of the top plate (2). The output end of the second air pump (12) is connected with an air delivery pipe (13). One end of the air delivery pipe (13) is connected with a jet head (14).

6. The generator cylinder head airtightness testing device according to claim 5, characterized in that: A sealing cover is provided at one end of the jet head (14). A pressure sensor is provided on the outside of the jet head (14). Multiple plugging heads can be placed on the top of the top plate (2).

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