Rear-end oil seal cover assembly and diesel engine

Abstract

The rear-end oil seal cover assembly comprises an upper cover body, a lower cover body and a fastener, upper connecting plates are arranged on the two sides of the bottom of the upper cover body respectively, upper connecting holes are formed in the upper connecting plates, and an upper arc-shaped hole is formed in the middle of the bottom of the upper cover body; lower connecting plates are arranged on the two sides of the upper portion of the lower cover body respectively, lower connecting holes are formed in the lower connecting plates, and a lower arc-shaped hole is formed in the middle of the upper portion of the lower cover body. The fastener penetrates through the upper connecting hole and the lower connecting hole to fix the upper cover body and the lower cover body, the upper arc-shaped hole and the lower arc-shaped hole define a through hole for one end of the crankshaft to penetrate out, a flywheel is arranged at the end, penetrating out of the through hole, of the crankshaft, and the outer diameter of the flywheel is larger than that of the through hole. In the disassembly process, the fastening piece is loosened, then the upper cover body is moved upwards, the upper cover body can be disassembled, a flywheel installed at the outer end of the crankshaft does not need to be disassembled, and therefore the maintenance convenience of the crankshaft can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engines, in particular to a rear end oil seal cover component and a diesel engine. Background Art

[0002] In existing diesel engines, the rear end (flywheel end) oil seal is usually used to prevent moisture and dust from entering the diesel engine and contaminating the lubricating oil. It can also prevent internal lubricating oil from leaking and causing lubricating oil loss.

[0003] The existing rear end oil seal cover structure is usually an integrated structure. When disassembling and maintaining, the flywheel needs to be removed first, and then the rear end oil seal cover can be removed along the axial direction of the crankshaft, so there is a problem of unchanged maintenance.

[0004] Therefore, how to improve the maintenance convenience of the rear end oil seal cover is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a rear end oil seal cover assembly and a diesel engine, which can effectively improve the maintenance convenience of the rear end oil seal cover.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A rear end oil seal cover assembly, comprising:

[0008] An upper cover body, wherein upper connecting plates are respectively provided on both sides of the bottom of the upper cover body, the upper connecting plates are arranged horizontally, the upper connecting plates are provided with upper connecting holes, and an upper arc-shaped hole is provided in the middle of the bottom of the upper cover body;

[0009] A lower cover body, wherein lower connecting plates are respectively provided on both sides of the upper portion of the lower cover body, the lower connecting plates are horizontally arranged, the lower connecting plates are provided with lower connecting holes, and a lower arc-shaped hole is provided in the middle portion of the upper portion of the lower cover body;

[0010] A fastener is connected to the upper connecting hole and the lower connecting hole to fix the upper cover and the lower cover, the upper arc hole and the lower arc hole are arranged to form a through hole for one end of the crankshaft to pass through, and a flywheel is provided at the end of the crankshaft passing through the through hole, and the outer diameter of the flywheel is larger than the outer diameter of the through hole.

[0011] In some embodiments, the upper cover and the lower cover are both aluminum covers.

[0012] In some embodiments, the fastener is a bolt.

[0013] In some embodiments, a sealing gasket is provided between the upper connecting plate and the lower connecting plate.

[0014] In some embodiments, a positioning pin is provided on the lower connecting plate, and a positioning hole for the positioning pin to pass through is provided on the upper connecting plate.

[0015] In some embodiments, the upper arc-shaped outer edge of the upper cover body is provided with an upper arc-shaped connecting plate, and the upper arc-shaped connecting plate is provided with a plurality of upper mounting holes evenly distributed along the circumferential direction; the lower arc-shaped outer edge of the lower cover body is provided with a lower arc-shaped connecting plate, and the lower arc-shaped connecting plate is provided with a plurality of lower mounting holes evenly distributed along the circumferential direction, and the axes of the upper mounting holes and the lower mounting holes are parallel to the axis of the through hole.

[0016] In some embodiments, the upper arc-shaped connecting plate is further provided with an upper positioning hole, and the lower arc-shaped connecting plate is further provided with a lower positioning hole, and the axes of the upper positioning hole and the lower positioning hole are parallel to the axis of the through hole.

[0017] In some embodiments, the inner end surface of the lower cover body is provided with a lower arc-shaped protrusion extending inward, and the inner end surface of the upper cover body is provided with an upper arc-shaped protrusion extending inward, the upper arc-shaped protrusion and the lower arc-shaped protrusion form a cylinder, the cylinder is sleeved on the crankshaft, and the lower arc-shaped protrusion is provided with a guide hole, the axis of the guide hole extends along the radial direction of the cylinder, the cylinder is located in the casing of the diesel engine, and the guide hole is used to drain the lubricating oil in the cylinder to the interior of the casing.

[0018] In some embodiments, the lower arc-shaped protrusion is provided with a plurality of the guide holes distributed along the circumferential direction.

[0019] A diesel engine comprises a rear end oil seal cover assembly as described above, and also comprises a casing, a crankshaft and a flywheel, wherein the crankshaft is rotatably connected to the casing, the rear end oil seal cover assembly is connected to the casing, one end of the crankshaft passes through a through hole of the rear end oil seal cover assembly, and the flywheel is connected to one end of the crankshaft that passes through the through hole.

[0020] Compared with the existing technology, the above technical solution has the following advantages:

[0021] The utility model provides a rear end oil seal cover assembly and a diesel engine, comprising: an upper cover, a lower cover, and a fastener, wherein the upper cover has upper connecting plates on both sides of its bottom, the upper connecting plates being arranged horizontally and having an upper connecting hole, and an upper arc-shaped hole being provided in the middle of its bottom; the lower cover has lower connecting plates on both sides of its upper portion, the lower connecting plates being arranged horizontally and having a lower connecting hole, and a lower arc-shaped hole being provided in the middle of its upper portion; the fastener is connected through the upper and lower connecting holes to secure the upper and lower covers, the upper and lower arc-shaped holes forming a through hole for one end of a crankshaft to pass through, the end of the crankshaft passing through the through hole being provided with a flywheel, the outer diameter of the flywheel being larger than the outer diameter of the through hole. When disassembling, the fastener is loosened and the upper cover is then moved upward to remove the upper cover, without having to remove the flywheel mounted on the outer end of the crankshaft, thereby effectively improving the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 An exploded view of a rear end oil seal cover assembly provided by a specific embodiment of the present utility model;

[0024] Figure 2 This is a structural schematic diagram of a rear end oil seal cover assembly provided by a specific embodiment of the utility model.

[0025] The reference numerals are as follows:

[0026] 10-upper cover, 11-upper connecting plate, 12-upper arc hole, 13-upper arc connecting plate, 14-upper mounting hole, 15-upper positioning hole;

[0027] 20-lower cover, 21-lower connecting plate, 22-lower arc hole, 23-lower arc connecting plate, 24-lower mounting hole, 25-lower positioning hole, 26-guide hole, 27-positioning pin;

[0028] 30-Fasteners. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Please refer to Figure 1 and Figure 2 , Figure 1 An exploded view of a rear end oil seal cover assembly provided by a specific embodiment of the present utility model; Figure 2 This is a structural schematic diagram of a rear end oil seal cover assembly provided by a specific embodiment of the utility model.

[0031] The embodiment of the present invention provides a rear end oil seal cover assembly, comprising: an upper cover body 10, a lower cover body 20 and a fastener 30, wherein upper connecting plates 11 are respectively provided on both sides of the bottom of the upper cover body 10, and the upper connecting plates 11 are arranged horizontally. The upper connecting plates 11 can be integrally formed with the upper cover body 10 by casting, and an upper connecting hole is provided on the upper connecting plate 11. An upper arc hole 12 is provided in the middle of the bottom of the upper cover body 10; lower connecting plates 21 are respectively provided on both sides of the upper part of the lower cover body 20, and the lower connecting plates 21 are arranged horizontally. The lower connecting plate 21 can be integrally formed with the upper cover 10 by casting. The lower connecting plate 21 is provided with a lower connecting hole. The middle portion of the upper portion of the lower cover 20 is provided with a lower arc-shaped hole 22. Fasteners 30 are connected through the upper and lower connecting holes to fix the upper cover 10 and the lower cover 20. The fasteners 30 are preferably bolts. The upper and lower arc-shaped holes 12 and 22 are arranged to form a through hole for one end of the crankshaft to pass through. A flywheel is provided at the end of the crankshaft passing through the through hole. The outer diameter of the flywheel is larger than the outer diameter of the through hole, and the crankshaft can rotate relative to the through hole. During assembly, the lower cover 20 can be first installed on the outer wall of the diesel engine casing. The lower connecting hole of the lower cover 20 contacts the lower arc-shaped surface of the outer end of the crankshaft. The upper cover 10 is buckled onto the upper arc-shaped surface of the outer end of the crankshaft, and the upper connecting hole is aligned with the lower connecting hole. Finally, the upper cover 10 and the lower cover 20 are fixed by the fasteners 30. During disassembly, the fastener 30 is loosened, and the upper cover 10 is then moved upward to remove the upper cover 10 , without removing the flywheel mounted on the outer end of the crankshaft, thereby effectively improving the convenience of maintenance.

[0032] In some embodiments, the upper cover 10 and the lower cover 20 are both aluminum covers. Compared with traditional iron covers, aluminum covers have the advantages of being lightweight and having good corrosion resistance and wear resistance.

[0033] In some embodiments, since the oil seal cover is designed as a split structure, in order to improve the sealing between the upper cover body 10 and the lower cover body 20, a sealing gasket is provided between the upper connecting plate 11 and the lower connecting plate 21. The sealing gasket can prevent the lubricating oil from flowing out from between the two connecting plates.

[0034] In some embodiments, the lower connecting plate 21 is provided with a positioning pin 27, and the upper connecting plate 11 is provided with a positioning hole for the positioning pin 27 to pass through. During installation, the lower cover 20 can be installed on the housing first, and then the upper cover 10 can be positioned using the positioning pin 27 and the positioning hole to improve the assembly accuracy of the two.

[0035] In some embodiments, the upper arc-shaped outer edge of the upper cover body 10 is provided with an upper arc-shaped connecting plate 13, and the upper arc-shaped connecting plate 13 is provided with a plurality of upper mounting holes 14 evenly distributed along the circumferential direction; the lower arc-shaped outer edge of the lower cover body 20 is provided with a lower arc-shaped connecting plate 23, and the lower arc-shaped connecting plate 23 is provided with a plurality of lower mounting holes 24 evenly distributed along the circumferential direction. The axes of the upper mounting holes 14 and the lower mounting holes 24 are parallel to the axis of the through hole. The upper cover body 10 can be connected to the upper mounting holes 14 by bolts and fixed to the casing, and the lower cover body 20 can be connected to the lower mounting holes 24 by bolts and fixed to the casing.

[0036] In some embodiments, an upper positioning hole 15 is further provided on the upper arc-shaped connecting plate 13, for example, an upper positioning hole 15 can be set at a position between two of the upper mounting holes 14, and a lower positioning hole 25 is further provided on the lower arc-shaped connecting plate 23, for example, a lower positioning hole 25 can be set at a position between two of the lower mounting holes 24. The axes of the upper positioning hole 15 and the lower positioning hole 25 are parallel to the axis of the through hole. An upper pin corresponding to the upper positioning hole 15 and a lower pin corresponding to the lower positioning hole 25 are provided on the end face of the casing. The upper pin and the upper positioning hole 15 can improve the installation accuracy of the upper cover body 10, and the lower pin and the lower positioning hole 25 can improve the installation accuracy of the lower cover body 20.

[0037] In some embodiments, the inner end surface of the lower cover 20 is provided with a lower arc-shaped protrusion extending inward, and the inner end surface of the upper cover 10 is provided with an upper arc-shaped protrusion extending inward. The upper and lower arc-shaped protrusions form a cylinder, which is mounted on the crankshaft. When the crankshaft rotates relative to the cylinder, lubricating oil is drawn into the cylinder. To prevent lubricating oil from accumulating in the cylinder, the lower arc-shaped protrusion is provided with a guide hole 26. The axis of the guide hole 26 extends radially along the cylinder. The lower arc-shaped protrusion is provided with a plurality of guide holes 26 distributed along the circumference. The cylinder is located in the casing of the diesel engine. The guide holes 26 can be used to guide the lubricating oil in the cylinder to the interior of the casing.

[0038] The present invention also provides a diesel engine comprising a rear end oil seal assembly according to any of the aforementioned embodiments, further comprising a casing, a crankshaft, and a flywheel. The crankshaft is rotatably connected to the casing, the rear end oil seal assembly is connected to the casing, one end of the crankshaft extends through a through hole in the rear end oil seal assembly, and the flywheel is connected to one end of the crankshaft extending through the through hole. The beneficial effects of the diesel engine can be referenced to the beneficial effects of the rear end oil seal assembly provided in the aforementioned embodiments and will not be further elaborated here.

[0039] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0040] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0041] The above describes in detail the rear end oil seal assembly and diesel engine provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A rear end oil seal cover assembly, characterized in that: include: An upper cover body (10), upper connecting plates (11) are respectively provided on both sides of the bottom of the upper cover body (10), the upper connecting plates (11) are arranged horizontally, upper connecting holes are provided on the upper connecting plates (11), and an upper arc-shaped hole (12) is provided in the middle of the bottom of the upper cover body (10); A lower cover body (20), wherein lower connecting plates (21) are respectively provided on both sides of the upper portion of the lower cover body (20), the lower connecting plates (21) are arranged horizontally, the lower connecting plates (21) are provided with lower connecting holes, and a lower arc-shaped hole (22) is provided in the middle of the upper portion of the lower cover body (20); A fastener (30) is connected to the upper connecting hole and the lower connecting hole to fix the upper cover (10) and the lower cover (20), the upper arc hole (12) and the lower arc hole (22) are arranged to form a through hole for one end of the crankshaft to pass through, and a flywheel is provided at the end of the crankshaft passing through the through hole, and the outer diameter of the flywheel is larger than the outer diameter of the through hole.

2. The rear end oil seal cover assembly according to claim 1, characterized in that: The upper cover body (10) and the lower cover body (20) are both aluminum cover bodies.

3. The rear end oil seal cover assembly according to claim 2, characterized in that: The fastener (30) is a bolt.

4. The rear end oil seal cover assembly according to claim 3, characterized in that: A sealing gasket is provided between the upper connecting plate (11) and the lower connecting plate (21).

5. The rear end oil seal cover assembly according to claim 4, characterized in that: A positioning pin (27) is provided on the lower connecting plate (21), and a positioning hole for the positioning pin (27) to pass through is provided on the upper connecting plate (11).

6. The rear end oil seal cover assembly according to claim 5, characterized in that: The upper arc-shaped outer edge of the upper cover body (10) is provided with an upper arc-shaped connecting plate (13), and the upper arc-shaped connecting plate (13) is provided with a plurality of upper mounting holes (14) evenly distributed along the circumferential direction; the lower arc-shaped outer edge of the lower cover body (20) is provided with a lower arc-shaped connecting plate (23), and the lower arc-shaped connecting plate (23) is provided with a plurality of lower mounting holes (24) evenly distributed along the circumferential direction, and the axes of the upper mounting holes (14) and the lower mounting holes (24) are parallel to the axis of the through hole.

7. The rear end oil seal cover assembly according to claim 6, characterized in that: An upper positioning hole (15) is further provided on the upper arc-shaped connecting plate (13), and a lower positioning hole (25) is further provided on the lower arc-shaped connecting plate (23). The axes of the upper positioning hole (15) and the lower positioning hole (25) are parallel to the axis of the through hole.

8. The rear end oil seal cover assembly according to any one of claims 1 to 7, characterized in that: The inner end surface of the lower cover body (20) is provided with a lower arc-shaped protrusion extending inward, and the inner end surface of the upper cover body (10) is provided with an upper arc-shaped protrusion extending inward, the upper arc-shaped protrusion and the lower arc-shaped protrusion are surrounded by a cylinder, the cylinder is sleeved on the crankshaft, and the lower arc-shaped protrusion is provided with a guide hole (26), the axis of the guide hole (26) extends along the radial direction of the cylinder, the cylinder is located in the casing of the diesel engine, and the guide hole (26) is used to guide the lubricating oil in the cylinder to the interior of the casing.

9. The rear end oil seal cover assembly according to claim 8, characterized in that: The lower arc-shaped protrusion is provided with a plurality of guide holes (26) distributed along the circumferential direction.

10. A diesel engine, characterized in that: The rear end oil seal cover assembly comprises the rear end oil seal cover assembly according to any one of claims 1 to 9, and further comprises a casing, a crankshaft and a flywheel, wherein the crankshaft is rotatably connected to the casing, the rear end oil seal cover assembly is connected to the casing, one end of the crankshaft passes through a through hole of the rear end oil seal cover assembly, and the flywheel is connected to one end of the crankshaft passing through the through hole.

Images