Bushing device for oil drain plug of oil pan of air-cooled engine

Abstract

The utility model discloses an air-cooled engine oil pan oil drain plug bushing device, which relates to the technical field of engine components, and comprises a bushing body, and a bolt and an O-shaped sealing ring are arranged to guarantee the sealing between the bushing body and an oil pan. The bushing body is installed in the oil drain hole, at the moment, the bolt is inserted into the through hole to be connected with the threaded hole in the oil pan, and at the moment, the bushing body is fixed by the bolt, so that when the bushing body is damaged, fixation of the bolt to the bushing body is removed, and the bushing body can be disassembled. The six fastening bolts can effectively prevent the displacement problem of the oil drainage bushing caused by misoperation, so that the reliability and durability of the bushing are improved, the fault occurrence frequency is reduced, meanwhile, the design structure is simple, disassembly and assembly are convenient, the time for replacing the oil pan bushing body is shortened, the risk of repairing the bushing body due to field damage is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine components, in particular to an oil drain screw plug bushing device for an oil pan of an air-cooled engine. Background Art

[0002] The oil drain plug bushing assembly for an air-cooled engine oil pan typically consists of a drain plug and a bushing. The engine oil pan is the lower half of the crankcase, also known as the lower crankcase. Its primary function is to seal the crankcase as a reservoir for engine oil, preventing the ingress of foreign matter. It also collects and stores lubricating oil returning from the engine's friction surfaces and dissipates some of the oil's heat, preventing high-temperature oxidation. An air-cooled engine oil pan, such as that of a Deutz air-cooled diesel engine, is typically cast from aluminum alloy. The drain plug bushing assembly typically requires the following technologies:

[0003] 1. An oil drain plug is installed at the lowest point outside the oil pan, which is mainly used to replace the lubricating oil;

[0004] 2. When processing the oil drain plug bushing device, install the oil drain bushing at the bottom of the aluminum oil pan. After tightening the external thread of the bushing and the internal thread of the oil pan, drill a hole in the bushing body of the oil pan and insert and fix it with a Φ5 elastic locating pin. After the bushing body is installed, install the copper washer and the oil drain plug.

[0005] At present, the manufacturer's original air-cooled diesel sump oil drain screw bushing installation process is:

[0006] 1. Clean the thread chips and burrs of the oil drain hole of the oil pan;

[0007] 2. Use anhydrous ethanol to clean the oil stains on the oil pan thread and bushing surface;

[0008] 3. Apply sealant to the thread surface of the bushing and leave it at room temperature for 24 hours to maximize the sealing effect;

[0009] 4. Using the locating pin hole on the step surface of the oil drain bushing as a reference, use a drilling machine to drill and ream the locating pin holes of the bushing and the oil pan drain hole;

[0010] 5. Press the hollow open elastic locating pin into the locating pin hole.

[0011] However, there is a problem with the above method. If the customer performs improper maintenance and oil replacement during the use of the diesel engine, the drain screw bushing may shear the elastic locating pin and cause displacement, scratching the installation plane of the oil pan drain screw bushing, resulting in sealing surface failure and lubricating oil leakage. At this time, the bushing needs to be replaced. Since the bushing thread is sealed with anaerobic adhesive with strong adhesion, the surface is scratched and the friction increases after the bushing is displaced, which makes it extremely difficult to disassemble without special tools. Destructive disassembly is also likely to damage the oil pan drain hole thread, causing the oil pan to be scrapped and replaced with a new oil pan. Therefore, it is difficult to repair the drain screw bushing on site, which is risky and has low work efficiency. In response to this problem, this application proposes a solution to replace the original elastic locating pins with six M4 bolts, which is easy to disassemble and assemble, shortens the time for replacing the oil pan drain bushing, solves the problem of difficult and risky repair of damage to the drain bushing on site, and improves work efficiency. Utility Model Content

[0012] (1) Technical problems solved

[0013] In view of the shortcomings of the existing technology, the utility model provides an air-cooled engine oil pan drain screw plug bushing device, which solves the technical problems of difficult and risky on-site damage repair of the drain screw plug bushing and low work efficiency.

[0014] (2) Technical solution

[0015] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0016] A drain plug bushing device for an air-cooled engine oil pan includes a bushing body, the inner side of the bushing body is threadedly connected to the drain plug body, six through holes are opened on the outside of the bushing body, a bolt is movably connected to the inside of each through hole, and a mounting groove is opened on the lower surface of the bushing body, an O-ring is clamped inside the mounting groove.

[0017] A countersunk hole is provided inside each through hole, and a bolt is movably connected to the inside of the countersunk hole. Six protective plates are provided on the outside of the bushing body, and the protective plates are located above the bolts. A fixing ring is fixedly installed on the outside of the bushing body, and a circular ring is rotatably connected to the outside of the fixing ring. The six protective plates are fixedly installed on the outside of the circular ring. A groove is provided on the outside of each protective plate, and the groove is located on the side of the protective plate away from the bolt. A first thread is provided on the outside of the fixing ring, and a second thread is provided on the inside of the circular ring. The circular ring is threadedly connected to the outside of the first thread through the second thread.

[0018] Preferably, a limiting ring is fixedly installed outside the fixing ring, and the circular ring is located between the limiting ring and the bolt.

[0019] Preferably, a limiting column is fixedly installed on the outside of the bushing body, and the limiting column is located at one end of the bushing body close to the circular ring.

[0020] (3) Beneficial effects

[0021] 1. By setting bolts and cooperating with O-rings, the O-rings ensure the seal between the bushing body and the oil pan, and facilitate the removal of the bushing. At this time, the bushing body is installed in the oil drain hole, and the bolts are inserted into the inside of the through hole to connect with the threaded holes on the oil pan. At this time, the bushing body is fixed by the bolts. Therefore, when the bushing body is damaged, the bolts fixing the bushing body can be released and the bushing body can be removed. The six fastening bolts can effectively prevent the displacement of the oil drain bushing caused by improper operation, thereby improving the reliability and durability of the bushing and reducing the frequency of failures. At the same time, the design structure is simple and disassembly and assembly are convenient, which shortens the time for replacing the oil pan bushing body, reduces the risk of on-site damage repair of the bushing body, and improves work efficiency.

[0022] 2. Set up a protective plate and match it with the bolt. Insert a tool into the groove and rotate the protective plate to move it above the bolt head. When the protective plate moves above the bolt head, the hexagonal hole in the bolt head is closed to prevent impurities from entering the hexagonal hole in the bolt head and affecting the removal of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 For this utility model Figure 1 Exploded structural diagram of the middle bushing body;

[0026] Figure 3 For this utility model Figure 2 Exploded structure diagram of the middle retaining ring;

[0027] Figure 4 For this utility model Figure 1 Bottom view of the middle bushing body;

[0028] Figure 5 For this utility model Figure 4 Structural diagram of the O-ring.

[0029] Legend: 1. Bushing body; 2. Oil drain plug body; 3. Through hole; 4. Bolt; 5. Mounting groove; 6. O-ring; 7. Countersunk hole; 8. Protective plate; 9. Retaining ring; 10. Circular ring; 11. Groove; 12. First thread; 13. Second thread; 14. Limiting ring; 15. Limiting column. DETAILED DESCRIPTION

[0030] The embodiment of the present application provides an air-cooled engine oil pan oil drain plug bushing device, which effectively solves the technical problems of difficult and risky on-site repair of oil drain bushing damage and low work efficiency.

[0031] Example

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The technical solution in the embodiment of the present application effectively solves the technical problems of difficult and high risk of on-site repair of oil drain bushing damage and low work efficiency. The overall idea is as follows:

[0033] In view of the problems existing in the prior art, the utility model provides an air-cooled engine oil pan oil drain plug bushing device, the air-cooled engine oil pan oil drain plug bushing device includes a bushing body 1, the bushing body 1 is a thin annular part installed between the oil drain plug and the oil pan oil drain hole, for enhancing the sealing effect and preventing direct contact and wear between the plug and the oil pan, the inner side of the bushing body 1 is threadedly connected to the oil drain plug body 2, the outside of the bushing body 1 is provided with six through holes 3, the interior of each through hole 3 is movably connected with a bolt 4, the bolt 4 adopts 12.9 grade M4 screw in GB3098.1-2010, which ensures a load of 8520N, which is about 870Kg after conversion. The use of bolt 4 to tighten improves the positioning reliability and bearing capacity, can withstand a torque of more than 300N.m, and reduces the risk of bushing displacement. The lower surface of the bushing body 1 is provided with a mounting groove 5, the interior of the mounting groove 5 is clamped with an O-ring 6, and the O-ring 6 adopts M 36*1.5 standard hydrogenated nitrile material, the bushing and the oil pan use O-ring 6 to replace the original thread sealant, the O-ring 6 ensures a tight seal between the bushing body 1 and the oil pan, and by setting bolts 4 and cooperating with O-ring 6, the O-ring 6 ensures the seal between the bushing body 1 and the oil pan, and is convenient for bushing disassembly. At this time, the bushing body 1 is installed in the oil drain hole, and the bolts 4 are inserted into the inside of the through hole 3 and connected with the threaded hole on the oil pan. At this time, the bushing body 1 is fixed by the bolts 4. Therefore, when the bushing body 1 is damaged, the bolts 4 can be released to fix the bushing body 1, and the bushing body 1 can be disassembled. The six fastening bolts 4 can effectively prevent the displacement of the oil drain bushing caused by improper operation, thereby improving the reliability and durability of the bushing and reducing the frequency of failures. At the same time, the design structure is simple and easy to disassemble and assemble, which shortens the time for replacing the oil pan bushing body 1, reduces the risk of on-site damage repair of the bushing body 1, and improves work efficiency.

[0034] A countersunk hole 7 is provided inside each through hole 3, and a bolt 4 is movably connected inside the countersunk hole 7. The countersunk hole 7 is usually used to accommodate the head of the bolt 4, so that the protruding part of the head of the bolt 4 is reduced after installation, thereby reducing interference or damage to surrounding components.

[0035] Six protective plates 8 are provided on the outside of the bushing body 1. The protective plates 8 are composed of a hexagonal body and a rectangular parallelepiped. The protective plates 8 are located above the bolt 4 to prevent impurities from entering the hexagonal hole opened at the head of the bolt 4 and affecting the disassembly of the bolt 4. A fixing ring 9 is fixedly installed on the outside of the bushing body 1. The outside of the fixing ring 9 is rotatably connected with a circular ring 10. The six protective plates 8 are fixedly installed on the outside of the circular ring 10 to facilitate the rotation of the protective plates 8 together. A groove 11 is provided on the outside of each protective plate 8. The groove 11 is located on the side of the protective plate 8 away from the bolt 4, which is convenient for the staff to use tools to rotate the protective plate 8. A first thread 12 is provided on the outside of the fixing ring 9, and a second thread 13 is provided on the inside of the circular ring 10. The circular ring 10 is threadedly connected to the outside of the first thread 12 through the second thread 13 to facilitate fixing the circular ring 10. A limiting ring 14 is fixedly installed on the outside of the fixing ring 9. The circular ring 10 is located between the limiting ring 14 and the bolt 4, to prevent the connection between the ring 10 and the fixing ring 9 from being released, a limiting column 15 is fixedly installed on the outside of the bushing body 1, and the limiting column 15 is located at one end of the bushing body 1 close to the ring 10, limiting the range of rotation of the protective plate 8, and the limiting column 15 is located next to a protective plate 8. When the protection of the protective plate 8 is released, the ring 10 is rotated to make the protective plate 8 away from the limiting column 15. When protection is performed, the protective plate 8 is rotated again to make one end of the protective plate 8 fit with the limiting column 15, thereby preventing the protective plate 8 from rotating excessively and affecting the protection of the protective plate 8 on the head of the bolt 4. By setting the protective plate 8 and cooperating with the bolt 4, a tool is used to insert into the inside of the groove 11 and rotate the protective plate 8 to move the protective plate 8 to above the head of the bolt 4. When the protective plate 8 moves to above the head of the bolt 4, the hexagonal hole opened at the head of the bolt 4 is closed to prevent impurities from entering the hexagonal hole opened at the head of the bolt 4 and affecting the disassembly of the bolt 4.

[0036] Working principle:

[0037] In the first step, the O-ring 6 is installed inside the mounting groove 5. The O-ring 6 is used to replace the original thread sealant between the bushing and the oil pan. At this time, the bushing body 1 is installed in the oil drain hole opened in the oil pan through its own external thread. At this time, the bolt 4 is inserted into the inside of the through hole 3 and connected to the threaded hole on the oil pan. At this time, the bushing body 1 is fixed by the bolt 4. The six fastening bolts 4 can effectively prevent the displacement of the oil drain bushing caused by improper operation. At the same time, the design structure is simple and easy to disassemble and assemble, which shortens the time of replacing the oil pan bushing body 1, reduces the risk of on-site damage repair of the bushing body 1, and improves work efficiency.

[0038] In the second step, when the bolt 4 is installed, use a tool to insert it into the groove 11 and rotate the protective plate 8 so that the protective plate 8 moves to the top of the head of the bolt 4. When one end of one of the protective plates 8 is in contact with the limit column 15, the protective plate 8 cannot rotate. At this time, the six protective plates 8 are located above the heads of the six bolts 4 in sequence. At this time, the hexagonal holes opened in the heads of the bolts 4 are closed to prevent impurities from entering the hexagonal holes opened in the heads of the bolts 4 and affecting the disassembly of the bolts 4.

[0039] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A drain plug bushing device for an air-cooled engine oil pan, comprising a bushing body (1), wherein the inner side of the bushing body (1) is threadedly connected to a drain plug body (2), characterized in that: Six through holes (3) are formed on the outside of the bushing body (1), and a bolt (4) is movably connected to the inside of each through hole (3); The lower surface of the bushing body (1) is provided with a mounting groove (5), and an O-type sealing ring (6) is clamped inside the mounting groove (5).

2. The air-cooled engine oil pan drain plug bushing device according to claim 1, characterized in that: Each through hole (3) is provided with a countersunk hole (7); The bolt (4) is movably connected inside the countersunk hole (7).

3. The oil drain plug bushing device for an air-cooled engine oil pan according to claim 1, characterized in that: Six protective plates (8) are provided on the outside of the bushing body (1); Wherein, the protective plate (8) is located above the bolt (4).

4. The oil drain plug bushing device for an air-cooled engine oil pan according to claim 1, characterized in that: A fixing ring (9) is fixedly mounted on the outside of the bushing body (1), and a circular ring (10) is rotatably connected to the outside of the fixing ring (9); Wherein, the six protection plates (8) are all fixedly mounted on the outside of the ring (10).

5. The oil drain plug bushing device for an air-cooled engine oil pan as claimed in claim 3, characterized in that: A groove (11) is formed on the outside of each of the protective plates (8); The groove (11) is located on a side of the protective plate (8) away from the bolt (4).

6. The oil drain plug bushing device for an air-cooled engine oil pan as claimed in claim 4, characterized in that: The fixing ring (9) is provided with a first thread (12) on the outside, and the circular ring (10) is provided with a second thread (13) on the inside; The ring (10) is threadedly connected to the outside of the first thread (12) through the second thread (13).

7. The oil drain plug bushing device for an air-cooled engine oil pan as claimed in claim 4, characterized in that: A limiting ring (14) is fixedly installed on the outside of the fixing ring (9); The circular ring (10) is located between the limiting ring (14) and the bolt (4).

8. The oil drain plug bushing device for an air-cooled engine oil pan as claimed in claim 1, characterized in that: A limiting column (15) is fixedly installed on the outside of the bushing body (1); The limiting column (15) is located at one end of the bushing body (1) close to the ring (10).

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