A structure of an oil level gauge cover for an explosion-proof engine

Abstract

The utility model discloses a kind of oil gauge cover structure for explosion-proof engine, it is related to engine manufacturing technical field, including cover, fixed sleeve, limiting component and oil gauge tube, the cover includes insertion screw cap and insertion screw cap top fixedly connected with sealing sleeve ring, the inside of insertion screw cap near bottom end is provided with locking assembly, the locking assembly includes horizontal limiting insertion rod, one end of the horizontal limiting insertion rod is fixedly connected with half ball head, the one end of the horizontal limiting insertion rod near half ball head is sleeved with reset spring.The utility model is by using the double locking design of the thread connection of insertion screw cap and fixed sleeve and the insertion limiting of horizontal limiting insertion rod and limiting groove, compared with traditional single thread locking, effective resistance sustained vibration in the running process of explosion-proof engine, avoid connection loose, the connecting place of sealing sleeve ring and fixed sleeve, the thread connection place of built-in cylinder and cylinder sleeve pipe are all provided with sealing ring, form effective protection.

Description

Technical Field

[0001] This utility model relates to the field of engine manufacturing technology, specifically to an oil dipstick cover structure for explosion-proof engines. Background Technology

[0002] In the field of explosion-proof engines, the dipstick cap structure is a key component that ensures the sealing of engine oil storage and prevents safety hazards in explosion-proof environments. Its performance directly affects the engine's operational stability and explosion-proof safety.

[0003] In existing technologies, dipstick cap structures generally suffer from the following problems: First, the locking method is singular, often employing a simple threaded connection. Under the continuous vibration generated during the long-term operation of an explosion-proof engine, the threaded connection is prone to loosening, leading to seal failure. This can not only cause oil leakage but also allow flammable and explosive gases or dust from the outside to enter the engine through the dipstick tube, posing a safety risk. Furthermore, the entry of external impurities can contaminate the engine oil and reduce the engine's service life. Second, the sealing performance is insufficient. Traditional structures rely solely on the sealing between the cap and the end face of the dipstick tube without a multi-layer sealing structure. Under the high-temperature and high-pressure explosion-proof working environment, the seals are prone to aging and failure, further exacerbating the risk of leakage. Utility Model Content

[0004] The purpose of this invention is to provide a dipstick cover structure for explosion-proof engines to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An oil dipstick cover structure for an explosion-proof engine includes a cover body, a fixing sleeve, a limiting component, and an oil dipstick tube. The cover body includes an insert cap and a sealing ring fixedly connected to the top of the insert cap. A locking component is provided inside the insert cap near the bottom end. The locking assembly includes a lateral limiting rod, one end of which is fixedly connected to a hemispherical head, and a return spring is sleeved on the end of the lateral limiting rod near the hemispherical head. The inner wall of the insertion cap near the bottom end is provided with a lateral insertion hole that matches the lateral limiting rod, and the inner wall of the fixing sleeve near the bottom end is provided with a limiting groove. The limiting component includes a bottom conical limiting tube, the outer wall of which near the bottom end is movably connected to the spherical surface of the hemispherical head.

[0006] A further improvement of this utility model is that: one end of the transverse limiting rod that passes through the transverse insertion hole is movably inserted into the inner wall of the limiting groove, and the end of the reset spring that is away from the hemispherical head is fixedly connected to the inner wall of the transverse insertion hole.

[0007] A further improvement of this utility model is that: the inner wall of the insert cap is fixedly connected to an inner cylinder, the outer wall of the inner cylinder is threaded with a sleeve, and the sleeve is fixedly connected to the top of the bottom conical limiting insert.

[0008] A further improvement of this utility model is that a sealing ring is fixedly connected to the top of the insert cap, and the sealing ring is movably sleeved on the top of the fixed sleeve.

[0009] A further improvement of this utility model is that: an oil dipstick connecting post is threaded into the inner wall of the bottom conical limiting insertion tube, an oil dipstick is fixedly connected to the bottom end of the oil dipstick connecting post, and a rotating disassembly ring is fixedly connected to the top of the bottom conical limiting insertion tube.

[0010] A further improvement of this utility model is that: the top of the dipstick connecting column is rotatably connected to a flip-up arc-shaped rod via a shaft seat, and the top of the rotating disassembly ring is fixedly connected to a limiting protrusion that is movably engaged with the inner wall of the flip-up arc-shaped rod.

[0011] A further improvement of this utility model is that: the outer wall of the sealing collar is fixedly connected with anti-slip protrusions, and the bottom end of the fixing sleeve is welded and fixed to the top end of the dipstick tube.

[0012] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: This utility model provides a dipstick cover structure for explosion-proof engines, which adopts a dual locking design of "threaded connection between the insert cap and the fixed sleeve and insertion limit of the lateral limiting rod and the limiting groove". Compared with the traditional single thread locking, it effectively resists the continuous vibration during the operation of the explosion-proof engine and avoids loosening of the connection.

[0013] This utility model provides a dipstick cover structure for explosion-proof engines. Sealing rings are provided at the connection between the sealing sleeve and the fixed sleeve, and at the threaded connection between the inner cylinder and the sleeve tube. Together with the threaded seal between the inserted cap and the fixed sleeve, multiple sealing lines are formed to effectively prevent external dust, water vapor and flammable and explosive gases from entering the dipstick tube, while preventing oil leakage and avoiding oil pollution and resource waste. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is an enlarged schematic diagram of the structure at point A of this utility model; Figure 3 This is a schematic diagram of the limiting component and the inner cylinder in the separated state of this utility model; Figure 4 This is a schematic diagram of the limiting component structure of this utility model; Figure 5 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram: 1. Cap; 2. Insert cap; 3. Sealing ring; 4. Fixing sleeve; 5. Limiting assembly; 6. Bottom conical limiting insert; 7. Lateral insertion hole; 8. Lateral limiting rod; 9. Return spring; 10. Hemispherical head; 11. Internal cylinder; 12. Dipstick; 13. Dipstick tube; 14. Sleeve connecting tube; 15. Rotary disassembly ring; 16. Limiting protrusion; 17. Dipstick connecting post; 18. Flip-over arc rod; 19. Limiting groove. Detailed Implementation

[0016] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The present invention will be further described in detail below with reference to embodiments: Example 1, such as Figures 1-5 As shown, this utility model provides a dipstick cover structure for an explosion-proof engine, including a cover body 1, a fixing sleeve 4, a limiting component 5 and a dipstick tube 13. The cover body 1 includes an insertion cap 2 and a sealing ring 3 fixedly connected to the top of the insertion cap 2. A locking component is provided inside the insertion cap 2 near the bottom end. The locking assembly includes a lateral limiting rod 8, one end of which is fixedly connected to a hemispherical head 10. A return spring 9 is sleeved on the end of the lateral limiting rod 8 near the hemispherical head 10. A lateral insertion hole 7 adapted to the lateral limiting rod 8 is opened on the inner wall of the insertion cap 2 near the bottom. A limiting groove 19 is opened on the inner wall of the fixing sleeve 4 near the bottom.

[0018] One end of the lateral limiting rod 8, which passes through the lateral insertion hole 7, is movably inserted into the inner wall of the limiting groove 19, and the end of the return spring 9, which is away from the hemispherical head 10, is fixedly connected to the inner wall of the lateral insertion hole 7.

[0019] An inner tube 11 is fixedly connected to the inner wall of the insert cap 2. A sleeve 14 is threaded onto the outer wall of the inner tube 11. The sleeve 14 is fixedly connected to the top of the bottom conical limiting insert tube 6.

[0020] A sealing ring 3 is fixedly connected to the top of the insert cap 2, and the sealing ring 3 is movably sleeved on the top of the fixed sleeve 4.

[0021] The outer wall of the sealing ring 3 is fixedly connected with anti-slip protrusions, and the bottom end of the fixing sleeve 4 is welded and fixed to the top end of the dipstick tube 13.

[0022] In this embodiment, the fixing sleeve 4 and the dipstick tube 13 are fixed by welding to ensure the rigidity and sealing of the basic connection and to prevent loosening or leakage at the connection point; the threaded engagement between the inner wall of the insert cap 2's inner cylinder 11 and the cylinder sleeve 14 makes the assembly and disassembly of the bottom conical limiting insert 6 precise and controllable, while improving the coaxiality of the overall structure and reducing eccentric wear caused by vibration; the design of the anti-slip protrusion on the outer wall of the sealing ring 3 increases the grip friction during operation, making it easier to rotate and assemble and disassemble the cap 1, and improving the ease of operation.

[0023] The limiting groove 19 is an annular groove structure. After the inserted cap 2 is tightened in place, the subsequent lateral movement of the lateral limiting rod 8 is not obstructed.

[0024] Example 2, as Figures 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the limiting component 5 includes a bottom conical limiting tube 6, and the outer wall of the bottom conical limiting tube 6 near the bottom end is movably connected to the spherical surface of the hemispherical head 10.

[0025] The inner wall of the bottom conical limiting insertion tube 6 is threaded with an oil dipstick connecting post 17, the bottom end of the oil dipstick connecting post 17 is fixedly connected with an oil dipstick 12, and the top of the bottom conical limiting insertion tube 6 is fixedly connected with a rotating disassembly ring 15.

[0026] The top of the dipstick connecting column 17 is rotatably connected to a flip-up arc rod 18 via a bearing seat, and the top of the rotating disassembly ring 15 is fixedly connected to a limiting protrusion 16 that is movably engaged with the inner wall of the flip-up arc rod 18.

[0027] In this embodiment, the threaded connection between the dipstick connecting post 17 and the bottom conical limiting insert 6, along with the locking engagement of the flip-up arc rod 18 and the limiting protrusion 16, enables the dipstick 12 to be separable from the cover 1. When it is necessary to check the oil level, there is no need to disassemble the cover 1; simply flip and unlock the flip-up arc rod 18 and rotate the dipstick connecting post 17 to pull out the dipstick 12. This operation is convenient and efficient, significantly reducing maintenance time. At the same time, it reduces the frequency of disassembly of the cover 1, reduces thread wear, and extends the service life of the overall structure. The locking design of the flip-up arc rod 18 and the limiting protrusion 16 can also effectively prevent the dipstick 12 from becoming loose during vibration, ensuring the stability of the dipstick assembly.

[0028] Example 3, as Figures 1-5As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the cover body 1 (including the insert screw cap 2 and the sealing ring 3), the fixing sleeve 4, the bottom conical limiting insert 6, the transverse limiting insert 8, the inner cylinder 11, the cylinder connecting sleeve 14, the rotating disassembly ring 15, the limiting protrusion 16, the dipstick connecting column 17 and the flipping arc rod 18 structural components are made of Q235 or 304 stainless steel.

[0029] The return spring 9 is made of high-temperature resistant spring steel to ensure that it can maintain stable elastic performance in the high-temperature environment of the engine and avoid loss of locking function due to spring failure.

[0030] The working principle of the dipstick cover structure used in explosion-proof engines will be explained in detail below.

[0031] like Figures 1-5 As shown, the top end of the fixing sleeve 4 and the dipstick tube 13 are first rigidly fixed by welding to ensure the sealing and structural stability of the connection, providing basic support for subsequent assembly. Then, the insertion cap 2 in the cover body 1 is inserted into the top opening of the fixing sleeve 4. Utilizing the threaded engagement between the insertion cap 2 and the fixing sleeve 4, the sealing ring 3 is rotated (the anti-slip protrusions on the outer wall of the sealing ring 3 increase grip friction and facilitate force application), so that the insertion cap 2 and the fixing sleeve 4 are initially locked through the threaded connection.

[0032] After initial fixation, the bottom conical limiting tube 6 in the limiting assembly 5 is aligned with the inner cylinder 11 inserted into the inner wall of the cap 2. By rotating the rotating disassembly ring 15 at the top of the bottom conical limiting tube 6, the cylindrical sleeve 14 fixed at the top of the bottom conical limiting tube 6 is threadedly connected to the outer wall of the inner cylinder 11. As the threading process progresses, the bottom conical limiting tube 6 gradually moves downward, and its conical outer wall near the bottom end contacts the spherical surface of the hemispherical head 10 in the locking assembly, generating a compressive force. Under this compressive force, the hemispherical head 10 drives the transverse limiting rod 8 to move laterally along the transverse insertion hole 7 inserted into the inner wall of the cap 2. At the same time, the return spring 9 sleeved on the transverse limiting rod 8 is compressed and accumulates elastic potential energy. When the bottom conical limiting insertion tube 6 is rotated to the preset position, the end of the transverse limiting insertion rod 8 away from the hemispherical head 10 passes through the transverse insertion hole 7 and is inserted into the limiting groove 19 on the inner wall of the fixed sleeve 4, thereby realizing the mechanical limiting lock between the insertion cap 2 and the fixed sleeve 4. At this time, the threaded connection of the bottom conical limiting insertion tube 6 and the insertion limiting of the transverse limiting insertion rod 8 form a double locking structure.

[0033] Align the dipstick connecting post 17, which is fixed at the top of the dipstick 12, with the opening on the inner wall of the bottom conical limiting tube 6. Rotate the dipstick connecting post 17 to engage with the threaded inner wall of the bottom conical limiting tube 6. When the dipstick connecting post 17 is screwed to the preset depth (the dipstick 12 reaches the detection position), rotate the flip-up arc rod 18, which is rotatably connected to the top of the dipstick connecting post 17 via the bearing seat. This causes the inner wall of the flip-up arc rod 18 to engage with the outer wall of the limiting protrusion 16, which is fixed at the top of the bottom conical limiting tube 6. The mechanical engagement axially limits the top of the dipstick connecting post 17, preventing the threads of the dipstick connecting post 17 from loosening during engine vibration, thus completing the assembly and fixing of the dipstick 12.

[0034] When only the oil level needs to be checked, there is no need to disassemble the cover 1. Simply move the flip-up arc rod 18 to disengage it from the locking protrusion 16, then rotate the dipstick connecting post 17 to disengage it from the threaded connection of the bottom conical limiting tube 6. Lifting the dipstick connecting post 17 will allow the dipstick 12 to be pulled out of the dipstick tube 13. When the cover 1 needs to be disassembled, rotating the disassembly ring 15 will move the bottom conical limiting tube 6 upward, causing the conical outer wall of the bottom conical limiting tube 6 to disengage from the pressure on the hemispherical head 10. At this time, the return spring 9 releases the accumulated elastic potential energy, pushing the transverse limiting rod 8 to move in the opposite direction along the transverse insertion hole 7, disengaging it from the limiting groove 19 of the fixed sleeve 4, thus releasing the second limiting lock. Then, rotate the sealing ring 3 in the opposite direction to disengage the threaded connection between the insert cap 2 and the fixed sleeve 4, allowing the cover 1 to be completely removed from the fixed sleeve 4. Among them, sealing rings are provided at the connection between the sealing ring 3 and the fixed sleeve 4, and at the threaded connection between the inner cylinder 11 and the sleeve 14, to ensure sealing performance throughout the process.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A dipstick cover structure for use in an explosion-proof engine, comprising a cover body (1), a fixing sleeve (4), a limiting component (5), and a dipstick tube (13), characterized in that: The cover (1) includes an insert cap (2) and a sealing collar (3) fixedly connected to the top of the insert cap (2). A locking component is provided inside the insert cap (2) near the bottom. The locking assembly includes a lateral limiting rod (8), one end of which is fixedly connected to a hemispherical head (10), and a return spring (9) is sleeved on the end of the lateral limiting rod (8) near the hemispherical head (10). The inner wall of the insertion cap (2) near the bottom end is provided with a lateral insertion hole (7) that is adapted to the lateral limiting rod (8). The inner wall of the fixing sleeve (4) near the bottom end is provided with a limiting groove (19). The limiting component (5) includes a bottom conical limiting tube (6), the outer wall of which near the bottom end is movably connected to the spherical surface of the hemispherical head (10).

2. The dipstick cap structure for an explosion-proof engine according to claim 1, characterized in that: The end of the lateral limiting rod (8) that passes through the lateral insertion hole (7) is movably inserted into the inner wall of the limiting groove (19), and the end of the reset spring (9) that is away from the hemispherical head (10) is fixedly connected to the inner wall of the lateral insertion hole (7).

3. The dipstick cap structure for an explosion-proof engine according to claim 1, characterized in that: The inner wall of the insertion cap (2) is fixedly connected to an inner cylinder (11), and the outer wall of the inner cylinder (11) is threaded with a sleeve (14), which is fixedly connected to the top of the bottom conical limiting insertion tube (6).

4. The dipstick cap structure for an explosion-proof engine according to claim 1, characterized in that: A sealing ring (3) is fixedly connected to the top of the insert cap (2), and the sealing ring (3) is movably sleeved on the top of the fixed sleeve (4).

5. The dipstick cap structure for an explosion-proof engine according to claim 1, characterized in that: The inner wall of the bottom conical limiting insertion tube (6) is threaded with an oil dipstick connecting post (17), the bottom end of the oil dipstick connecting post (17) is fixedly connected with an oil dipstick (12), and the top of the bottom conical limiting insertion tube (6) is fixedly connected with a rotating disassembly ring (15).

6. The dipstick cap structure for an explosion-proof engine according to claim 5, characterized in that: The top of the dipstick connecting column (17) is rotatably connected to a flip-up arc rod (18) via a bearing seat, and the top of the rotating disassembly ring (15) is fixedly connected to a limiting protrusion (16) that is movably engaged with the inner wall of the flip-up arc rod (18).

7. The dipstick cap structure for an explosion-proof engine according to claim 1, characterized in that: The outer wall of the sealing sleeve (3) is fixedly connected with anti-slip protrusions, and the bottom end of the fixing sleeve (4) is welded and fixed to the top end of the dipstick tube (13).

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