Cylinder head air tightness detection machine

Abstract

This utility model discloses a cylinder head airtightness testing machine, including a testing machine platform. A PLC control box is fixedly installed on one side of the upper surface of the testing machine platform, and a support frame is fixedly installed on the other side of the upper surface of the testing machine platform. Two lifting cylinders are symmetrically fixedly installed on the upper end of the support frame, and a positioning plate is fixedly connected to one end of each of the two lifting cylinders. A limit frame is fixedly installed at the bottom of the positioning plate, and multiple airtightness detectors are symmetrically fixedly installed on both sides of the limit frame. A placement platform is set above the testing machine platform below the support frame. Clamping structures are set on both sides of the placement platform. The clamping structure includes a first positioning frame fixedly installed on both sides of the upper surface of the testing machine platform. A first clamping cylinder is fixedly installed inside each of the two first positioning frames, and a clamping box is fixedly connected to one end of each first clamping cylinder. This machine can perform dual-station airtightness testing of cylinder heads and can clamp and position cylinder heads of different sizes and specifications.

Description

Technical Field

[0001] This utility model relates to the field of cylinder head airtightness testing technology, and in particular to a cylinder head airtightness testing machine. Background Technology

[0002] The cylinder head is mounted on top of the cylinder block, sealing the cylinder from above and forming the combustion chamber. It is constantly in contact with high-temperature, high-pressure combustion gases, thus bearing significant thermal and mechanical loads. Water-cooled engines have a cooling water jacket inside the cylinder head, and the cooling water holes on the lower end face of the cylinder head communicate with the cooling water holes in the cylinder block. Circulating water is used to cool the combustion chamber and other high-temperature components.

[0003] Existing cylinder head air tightness testing methods have some shortcomings. Traditional testing machines can only limit and fix cylinder heads of fixed sizes. When it is necessary to test the air tightness of cylinder heads of different sizes and specifications, the operator often needs to change the tooling fixtures, which is time-consuming and cumbersome, reducing the adaptability of the testing device. In order to address the above problems, an improved and upgraded cylinder head air tightness testing method is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a cylinder head airtightness testing machine to solve the problems mentioned in the background art.

[0005] To solve the above problems, the following technical solution is provided: a cylinder head airtightness testing machine, including a testing machine base, a PLC control box is fixedly installed on one side of the upper surface of the testing machine base, and a support frame is fixedly installed on the other side of the upper surface of the testing machine base. Two lifting cylinders are symmetrically fixedly installed on the upper end of the support frame, and a positioning plate is fixedly connected to one end of each of the two lifting cylinders. A limit frame is fixedly installed at the bottom of the positioning plate, and multiple airtightness detectors are symmetrically fixedly installed on both sides of the limit frame. A placement platform is provided above the testing machine base below the support frame.

[0006] Both sides of the placement platform are provided with clamping structures. Each clamping structure includes a first positioning frame fixedly installed on both sides of the upper end of the testing machine platform. Each of the two first positioning frames is fixedly provided with a first clamping cylinder, and one end of the first clamping cylinder is fixedly connected to a clamping box. Multiple buffer springs are fixedly provided inside the clamping box, and one end of each buffer spring is fixedly connected to a flexible clamping rod.

[0007] As a preferred embodiment of the above technical solution, the first positioning frame is symmetrically connected to the first clamping cylinder with limiting slide rods inside, and one end of each limiting slide rod is fixedly connected to the rear side of the clamp box. The outer wall of the clamp box is fixedly provided with a limiting baffle.

[0008] As a preferred embodiment of the above technical solution, the limiting baffle has a slot inside that matches the size of the flexible clamping rod, the flexible clamping rod slides relative to the slot, and a fixing sleeve is slidably connected to the outer wall of the flexible clamping rod and the fixing sleeve is fixedly installed inside the clamp box.

[0009] As a preferred embodiment of the above technical solution, a second positioning frame is fixedly installed on the rear side of the placement platform at the upper end of the testing machine platform. Two second clamping cylinders are fixedly installed inside the second positioning frame, and one end of each second clamping cylinder is fixedly connected to an anti-slip clamping plate.

[0010] As a preferred embodiment of the above technical solution, two guide sliders are symmetrically fixedly arranged at the bottom of the placement platform and the guide sliders are slidably connected to the guide rail, and the guide rail is fixedly installed on the upper end of the testing machine platform.

[0011] As a preferred embodiment of the above technical solution, each of the multiple airtight detectors is fixedly connected to a connecting pipe at one end, and a mounting disc is fixedly installed at one end of the connecting pipe. A sealing ring is fitted inside the mounting disc.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The device of this utility model is equipped with components such as a first positioning frame, a first clamping flagpole, a clamp box, a flexible clamping rod, and a buffer spring. By driving two first clamping cylinders, the clamp box moves synchronously to fit and clamp the cylinder cover. According to the outer wall shape of the cylinder cover, the flexible clamping rod slides inside the fixed sleeve under the action of the buffer spring, which is convenient for positioning and fixing cylinder covers of different specifications and sizes. It is beneficial to improve the stability of the cylinder cover while performing dual-station airtightness testing, and improves the applicability and processing efficiency of the testing machine.

[0014] 2. The device of this utility model is equipped with components such as airtight detectors, connecting pipes, mounting discs, and sealing rings. Multiple airtight detectors are steadily lowered by a lifting cylinder, which causes the mounting discs on the connecting pipes to be precisely screwed into multiple cavities inside the cylinder head. Then, the sealing rings are used to squeeze and fill the gaps, improving the tightness of the connection between the airtight connecting pipe and the cylinder head cavity, avoiding gas leakage from affecting the test results data, and improving the reliability of data detection.

[0015] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of a cylinder head airtightness testing machine according to the present invention;

[0018] Figure 2 This is a side view of a cylinder head airtightness testing machine according to the present invention;

[0019] Figure 3 for Figure 1 A partial enlarged diagram of the split structure;

[0020] Figure 4 for Figure 3 A partial enlarged diagram of the split structure;

[0021] Figure 5 for Figure 2 A magnified schematic diagram of the localized explosion structure.

[0022] In the diagram: 1. Testing machine; 2. PLC control box; 3. Support frame; 31. Limit frame; 32. Air tightness detector; 33. Connecting pipe; 34. Mounting disc; 35. Sealing ring; 4. Placement platform; 41. Guide slide rail; 42. Guide slider; 5. Clamping structure; 51. First positioning frame; 52. First clamping cylinder; 53. Limiting slide bar; 54. Fixture box; 55. Limiting baffle; 56. Fixed sleeve; 57. Flexible clamping rod; 58. Buffer spring; 6. Lifting cylinder; 7. Second positioning frame; 71. Second clamping cylinder. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 5 As shown in the figure, the cylinder head air tightness testing machine provided in this embodiment includes a testing machine base 1. A PLC control box 2 is fixedly installed on one side of the upper end of the testing machine base 1, and a support frame 3 is fixedly installed on the other side of the upper end of the testing machine base 1. Two lifting cylinders 6 are symmetrically fixedly installed on the upper end of the support frame 3. A positioning plate is fixedly connected to one end of each of the two lifting cylinders 6. A limit frame 31 is fixedly installed at the bottom of the positioning plate, and multiple air tightness detectors 32 are symmetrically fixedly installed on both sides of the limit frame 31. A placement platform 4 is provided above the testing machine base 1 and below the support frame 3.

[0025] Both sides of the placement platform 4 are provided with clamping structures 5. The clamping structure 5 includes a first positioning frame 51 fixedly installed on both sides of the upper end of the testing machine platform 1. A first clamping cylinder 52 is fixedly installed inside each of the two first positioning frames 51, and a clamping box 54 is fixedly connected to one end of the first clamping cylinder 52. Multiple buffer springs 58 are fixedly installed inside the clamping box 54, and a flexible clamping rod 57 is fixedly connected to one end of each buffer spring 58.

[0026] like Figures 3 to 4 As shown, the first positioning frame 51 is symmetrically connected to the first clamping cylinder 52 with limiting slide rods 53 inside. One end of each limiting slide rod 53 is fixedly connected to the rear side of the fixture box 54. The outer wall of the fixture box 54 is fixedly provided with a limiting baffle 55. The limiting baffle 55 has a slot that matches the size of the flexible clamping rod 57. The flexible clamping rod 57 slides with the slot. The outer wall of the flexible clamping rod 57 is slidably connected with a fixing sleeve 56, and the fixing sleeve 56 is fixedly installed inside the fixture box 54. The second positioning frame 7 is fixedly provided on the rear side of the placement platform 4 at the upper end of the testing machine platform 1. The second positioning frame 7 has two second clamping cylinders 71 fixedly provided inside, and one end of each second clamping cylinder 71 is fixedly connected to an anti-slip clamping plate.

[0027] By setting two limiting slide bars 53 on the rear side of the clamp box 54, it is easier to move the clamp box 54 with the first clamping cylinder 52 in a relatively stable manner. At the same time, when the flexible clamping rod 57 encounters an irregular cylinder head, the part that first comes into contact with the cylinder head is squeezed and limited by the buffer spring 58. Under the action of elastic force, it rebounds and limits the cylinder head. At the same time, the fixed sleeve 56 and the limiting baffle 55 limit the multiple flexible clamping rods 57 to avoid movement and misalignment. This makes it easy to perform dual-station airtightness testing of the cylinder head and to position cylinder heads of various sizes and specifications. The second clamping cylinder 71 is set to facilitate secondary positioning and fixing of the cylinder head.

[0028] like Figure 5 As shown, two guide sliders 42 are symmetrically fixed at the bottom of the placement platform 4 and the guide sliders 42 are slidably connected to the guide rail 41. The guide rail 41 is fixedly installed on the upper end of the testing machine platform 1. One end of each of the multiple airtight detectors 32 is fixedly connected to a connecting pipe 33 and a mounting disc 34 is fixedly installed at one end of the connecting pipe 33. A sealing ring 35 is fitted inside the mounting disc 34.

[0029] By setting up air tightness detectors 32, specifically differential pressure air tightness detectors (model YX-QS-P100), multiple air tightness detectors 32 are connected to the cylinder head cavity via connecting pipes 33. The gaps are filled by compression through sealing rings 35, making the cylinder head air tightness test relatively reliable and preventing leakage from affecting the data results.

[0030] The working principle and process of this utility model are as follows: First, the operator places two cylinder heads onto the placement platform 4 in sequence, connects the external power supply, and drives the bottom guide slider 42 of the placement platform 4 to move along the guide rail 41 to below the airtightness detector 32. At this time, the first clamping cylinders 52 in the two first positioning frames 51 are driven to work, causing multiple flexible clamping rods 57 in the two clamping boxes 54 to move relative to each other and clamp and limit the two sides of the cylinder head. According to the outer shape of the cylinder head, the flexible clamping rods 57 slide within the fixed sleeve 56 to compress the buffer spring 58, thereby facilitating the clamping and limiting of different specifications. The cylinder head of the specified size is clamped and positioned, while the two second clamping cylinders 71 in the second positioning frame 7 are driven to move the two anti-slip clamps to limit the cylinder head and improve positioning stability. After the cylinder head is fixed, the lifting cylinder 6 drives the two sets of air tightness detectors 32 in the limiting frame 31 on the positioning plate to rise and fall stably. When one end of the connecting pipe 33 is close to the cylinder head cavity, the movement stops. Then, the disc 34 installed on the connecting pipe 33 is connected to the internal cavity of the cylinder head. The sealing ring 35 is used to squeeze and facilitate the connection to achieve a relatively sealed connection, avoiding problems such as gas leakage affecting the monitoring data during cylinder head testing.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

Claims

1. A cylinder head airtightness detection machine characterized by comprising: The equipment includes a testing machine (1), a PLC control box (2) is fixedly installed on one side of the upper end of the testing machine (1), and a support frame (3) is fixedly installed on the other side of the upper end of the testing machine (1). Two lifting cylinders (6) are symmetrically fixedly installed on the upper end of the support frame (3). A positioning plate is fixedly connected to one end of each of the two lifting cylinders (6). A limit frame (31) is fixedly installed at the bottom of the positioning plate, and multiple air tightness detectors (32) are symmetrically fixedly installed on both sides of the limit frame (31). A placement platform (4) is set above the testing machine (1) and below the support frame (3). The placement platform (4) is provided with clamping structures (5) on both sides. The clamping structure (5) includes a first positioning frame (51) fixedly installed on both sides of the upper end of the testing machine (1). A first clamping cylinder (52) is fixedly installed inside each of the two first positioning frames (51), and a clamping box (54) is fixedly connected to one end of the first clamping cylinder (52). A plurality of buffer springs (58) are fixedly installed inside the clamping box (54), and a flexible clamping rod (57) is fixedly connected to one end of the buffer spring (58).

2. The cylinder head air tightness detection machine according to claim 1, characterized in that, The first positioning frame (51) is symmetrically connected to the first clamping cylinder (52) with limiting slide rods (53). One end of each of the two limiting slide rods (53) is fixedly connected to the rear side of the clamp box (54). The outer wall of the clamp box (54) is fixedly provided with a limiting baffle (55).

3. The cylinder head gas tightness detection machine according to claim 2, characterized in that, The limiting baffle (55) has a slot that matches the size of the flexible clamping rod (57). The flexible clamping rod (57) slides against the slot. The outer wall of the flexible clamping rod (57) is slidably connected to a fixing sleeve (56), and the fixing sleeve (56) is fixedly installed inside the clamp box (54).

4. The cylinder head air tightness detection machine of claim 3, wherein, The placement platform (4) is fixedly provided with a second positioning frame (7) on the upper end of the testing machine platform (1) on the rear side. The second positioning frame (7) is fixedly provided with two second clamping cylinders (71) and one end of the second clamping cylinder (71) is fixedly connected to an anti-slip clamping plate.

5. The cylinder head gas tightness detection machine according to claim 4, wherein The bottom of the placement platform (4) is symmetrically fixed with two guide sliders (42), and the guide sliders (42) are slidably connected to the guide rail (41). The guide rail (41) is fixedly installed on the upper end of the testing machine (1).

6. The cylinder head air tightness detection machine of claim 1, wherein, Each of the multiple airtight detectors (32) is fixedly connected to a connecting pipe (33) at one end, and a mounting disc (34) is fixedly installed at one end of the connecting pipe (33). A sealing ring (35) is fitted inside the mounting disc (34).

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