Adjustable airtight experimental tool for casting guide wheel body

Abstract

The utility model discloses a kind of adjustable air-tight test tool for casting guide wheel body, it is related to experimental tool technical field for guide wheel body, including first sealing cover, adjusting structure and second sealing cover, characterized by, hoisting nut is welded on the first sealing cover outside wall, threaded hole is set up on first sealing cover, second sealing cover is arranged on the side of first sealing cover away from hoisting nut, guide wheel body is set between first sealing cover and second sealing cover;Device is changed by rotating full thread screw rod, using the thread cooperation with limiting nut, to change the position of full thread screw rod in thick-walled pipe, to change the spacing between first sealing cover and second sealing cover, to adapt to the guide wheel body of different span, realize span adjustable, meet the air-tight test demand of multiple models guide wheel body, avoid the trouble that each model needs to make air-tight test tool separately and reduce cost, and disassembly is simple and easy to operate.

Description

Technical Field

[0001] This utility model relates to the technical field of experimental tooling for guide wheel bodies, specifically an adjustable airtight experimental tooling for casting guide wheel bodies. Background Technology

[0002] In tracked machinery such as excavators, tunneling machines, and bulldozers, the idler wheel is a core component ensuring the normal operation of the tracks. Its functions include guiding track movement, cushioning and damping shocks, and increasing the ground contact area, directly affecting the machine's working efficiency and stability. After the idler wheel is assembled, the oil tank and float seal chamber of the wheel core must be filled with lubricating oil to achieve key functions such as lubrication and friction reduction, heat dissipation and cooling, and sealing and corrosion prevention. The oil film formed by the lubricating oil can reduce metal friction loss, absorb operating heat to prevent overheating, and at the same time prevent impurities from entering and buffer mechanical vibration.

[0003] However, during the casting process, guide wheels may develop defects such as porosity, sand adhesion, sand inclusion, sand holes, and sand expansion. These defects can lead to lubricant leakage, resulting in wheel wear, mechanical failure, and even safety accidents. Therefore, testing the wheel's sealing performance through an airtightness test is a crucial step in ensuring the quality of guide wheels. During the airtightness test, the guide wheel core has an open structure, requiring both ends to be sealed to create a closed space for the test. Traditional experimental fixtures for guide wheel bodies have poor versatility; different guide wheel models have different core spans, necessitating customized fixtures for each model, leading to high costs and significant inventory pressure. Therefore, those skilled in the art have provided an adjustable airtightness testing fixture for casting guide wheel bodies to solve the problems mentioned in the background section. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable airtightness test fixture for casting guide wheel bodies, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An adjustable airtightness test fixture for casting a guide wheel body includes a first sealing cover, an adjustment structure, and a second sealing cover. The first sealing cover has a lifting nut welded to its outer wall, a threaded hole, and a second sealing cover located on the side of the first sealing cover away from the lifting nut. A guide wheel body is disposed between the first and second sealing covers, and an adjustment structure is located between the first and second sealing covers and inside the guide wheel body.

[0006] As a further embodiment of this utility model: the adjustment structure includes a thick-walled tube, a fully threaded screw, and a limiting nut. The thick-walled tube is welded to the side of the first sealing cover away from the lifting nut, and the limiting nut is welded to the end of the thick-walled tube away from the first sealing cover. The limiting nut is internally threaded with a fully threaded screw.

[0007] As a further improvement of this utility model: a first sealing ring is provided between the first sealing cover and the guide wheel body, and a second sealing ring is provided between the second sealing cover and the guide wheel body, and both the first sealing ring and the second sealing ring are made of polyurethane.

[0008] As a further improvement of this utility model: a through groove is provided inside the second sealing cover, a connecting block is inserted into the through groove, and a sealing block is fixedly connected to one end of the connecting block.

[0009] As a further improvement of this utility model: the sealing block has an annular groove near the connecting block, and an O-ring is provided inside the annular groove. The O-ring is made of nitrile rubber.

[0010] As a further improvement of this utility model: the connecting block has a threaded groove at one end near the fully threaded screw, and the threaded groove is threadedly connected to the fully threaded screw.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This device changes the position of the fully threaded screw inside the thick-walled tube by rotating the fully threaded screw and utilizing its threaded engagement with the limiting nut. This changes the distance between the first and second sealing caps to adapt to guide wheel bodies with different spans, achieving adjustable spans. It meets the airtightness test requirements of various guide wheel models, avoiding the hassle of making separate airtightness test fixtures for each model and reducing costs. It is also easy to disassemble and operate. This device improves its sealing performance by using a first sealing ring, a second sealing ring, and an O-ring, and also facilitates the replacement of the sealing rings when the device is disassembled later. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an adjustable airtight experimental fixture for casting guide wheel bodies.

[0013] Figure 2 This is a schematic diagram showing the disassembled structure of an adjustable airtight experimental fixture for casting guide wheels.

[0014] Figure 3 This is a schematic diagram of the structure of the guide wheel body in an adjustable airtight experimental fixture for casting guide wheel bodies.

[0015] Figure 4 This is a schematic diagram of the structure connecting the guide wheel body to the adjustable airtight experimental fixture used for casting guide wheel bodies.

[0016] In the diagram: 1. Lifting nut; 2. First sealing cap; 3. Threaded hole; 4. First sealing ring; 5. Second sealing cap; 6. Through groove; 7. Sealing block; 8. O-ring; 9. Connecting block; 10. Thick-walled pipe; 11. Fully threaded screw; 12. Limit nut; 13. Second sealing ring; 14. Threaded groove; 15. Guide wheel body. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1: Refer to Figure 1-4 This embodiment provides an adjustable airtight experimental fixture for casting a guide wheel body, including a first sealing cover 2, an adjustment structure, and a second sealing cover 5. The first sealing cover 2 is characterized in that a lifting nut 1 is welded to the outer wall of the first sealing cover 2, a threaded hole 3 is provided on the first sealing cover 2, a second sealing cover 5 is provided on the side of the first sealing cover 2 away from the lifting nut 1, a guide wheel body 15 is provided between the first sealing cover 2 and the second sealing cover 5, and an adjustment structure is provided between the first sealing cover 2 and the second sealing cover 5 and inside the guide wheel body 15.

[0019] The adjustment structure includes a thick-walled tube 10, a fully threaded screw 11, and a limiting nut 12. The thick-walled tube 10 is welded to the side of the first sealing cover 2 away from the lifting nut 1, and the limiting nut 12 is welded to the end of the thick-walled tube 10 away from the first sealing cover 2. The fully threaded screw 11 is internally connected to the limiting nut 12.

[0020] A first sealing ring 4 is provided between the first sealing cover 2 and the guide wheel body 15, and a second sealing ring 13 is provided between the second sealing cover 5 and the guide wheel body 15. Both the first sealing ring 4 and the second sealing ring 13 are made of polyurethane.

[0021] In this implementation, the position of the fully threaded screw 11 within the thick-walled tube 10 is changed by rotating the fully threaded screw 11 and utilizing its threaded engagement with the limiting nut 12. This changes the distance between the first sealing cover 2 and the second sealing cover 5, adapting to guide wheel bodies 15 with different spans. This allows for adjustable spans, meeting the airtightness test requirements of various guide wheel models. It avoids the hassle of manufacturing separate airtightness test fixtures for each model and reduces costs. Then, the first sealing ring 4, guide wheel body 5, and second sealing ring 13 are sequentially passed through the fully threaded screw 11. The first sealing cover 2 and the second sealing cover 5 are then aligned with the two open ends of the guide wheel body 15, ensuring that the thick-walled tube 10 of the first sealing cover, the fully threaded screw 11, and the through groove 6 of the second sealing cover 5 are aligned in a straight line. The first sealing ring 4 between the first sealing cover 2 and the guide wheel body, and the second sealing ring 13 between the second sealing cover 5 and the guide wheel body, initially adhere to the wheel body port, using rubber elasticity to fill the tiny gaps and form an initial sealing contact.

[0022] Example 2: Refer to Figure 1-4 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that the second sealing cover 5 has a through groove 6 inside, a connecting block 9 is inserted into the through groove 6, a sealing block 7 is fixedly connected to one end of the connecting block 9, the sealing block 7 has an annular groove near the connecting block 9, and an O-ring seal 8 is provided inside the annular groove. The O-ring seal 8 is made of nitrile rubber. The connecting block 9 has a threaded groove 14 near the fully threaded screw 11, and the threaded groove 14 is threadedly connected to the fully threaded screw 11.

[0023] In this embodiment, the sealing block 7, which contains an O-ring 8 made of nitrile rubber, is inserted into the through groove 6 of the second sealing cover via the connecting block 9. The sealing block 7 is then tightened until the O-ring 8 fits tightly against the inner wall of the second sealing cover 5, thus completing the full sealing of the internal space of the wheel body. The O-ring 8 enhances the sealing effect. A threaded hole 3 is provided on the first sealing cover 2, which is used to connect to a gas injection pipe with a matching thread, allowing gas to smoothly enter the sealed space inside the wheel core, completing the preparation work before the airtightness test. After the test is completed, the sealing block 7 is rotated in the opposite direction to move the connecting block 9 off the fully threaded screw 11, thereby removing the connecting block 9 from the second sealing cover 5. Then, the fully threaded screw 11 is rotated to move the first sealing cover 2 and the second sealing cover 5 away from each other, making it easy to remove the guide wheel body 15. Since each component adopts a threaded connection and modular design, the disassembly process does not require special tools, and the tooling can be reused by replacing the worn sealing ring.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and 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.

Claims

1. An adjustable airtightness test fixture for casting guide wheel bodies, comprising a first sealing cover (2), an adjustment structure, and a second sealing cover (5), characterized in that, A lifting nut (1) is welded to the outer wall of the first sealing cover (2). A threaded hole (3) is opened on the first sealing cover (2). A second sealing cover (5) is provided on the side of the first sealing cover (2) away from the lifting nut (1). A guide wheel body (15) is provided between the first sealing cover (2) and the second sealing cover (5). An adjustment structure is provided between the first sealing cover (2) and the second sealing cover (5) and inside the guide wheel body (15).

2. The adjustable airtightness test fixture for casting guide wheel body according to claim 1, characterized in that, The adjustment structure includes a thick-walled tube (10), a fully threaded screw (11), and a limiting nut (12). The first sealing cover (2) is welded with a thick-walled tube (10) on the side away from the lifting nut (1). The end of the thick-walled tube (10) away from the first sealing cover (2) is welded with a limiting nut (12). The limiting nut (12) is internally threaded with a fully threaded screw (11).

3. The adjustable airtightness test fixture for casting guide wheel body according to claim 1, characterized in that, A first sealing ring (4) is provided between the first sealing cover (2) and the guide wheel body (15), and a second sealing ring (13) is provided between the second sealing cover (5) and the guide wheel body (15). Both the first sealing ring (4) and the second sealing ring (13) are made of polyurethane.

4. The adjustable airtightness test fixture for casting guide wheel body according to claim 1, characterized in that, The second sealing cover (5) has a through groove (6) inside, and a connecting block (9) is inserted into the through groove (6). A sealing block (7) is fixedly connected to one end of the connecting block (9).

5. The adjustable airtightness test fixture for casting guide wheel body according to claim 4, characterized in that, The sealing block (7) has an annular groove near the connecting block (9), and an O-ring (8) is provided inside the annular groove. The O-ring (8) is made of nitrile rubber.

6. The adjustable airtightness test fixture for casting guide wheel body according to claim 4, characterized in that, The connecting block (9) has a threaded groove (14) at one end near the fully threaded screw (11), and the threaded groove (14) is threadedly connected to the fully threaded screw (11).

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