An engine lubricating oil extraction structure

Abstract

The present invention provides an engine lubricating oil extraction structure, belonging to the technical field of engines. It solves the problem that the lubricating oil in the oil sump of the existing engine cannot participate in lubrication. This engine includes a box body, and the bottom of the inner cavity of the box body has an oil sump. The extraction structure includes a first oil pipe and an oil pump fixed in the box body. The oil inlet end of the first oil pipe is communicated with the bottom of the oil sump, and the oil outlet end of the first oil pipe is connected to the oil pump through an oil passage in the box body. The engine lubricating oil extraction structure of the present invention has the advantages of enabling the lubricating oil located at the bottom of the inner cavity of the box body to be recycled and reducing the weight of the engine.

Description

Technical Field

[0001] The present invention belongs to the technical field of engines and relates to an engine lubricating oil extraction structure. Background Art

[0002] An engine is a machine that can convert other forms of energy into mechanical energy, including, for example, internal combustion engines, external combustion engines, jet engines, and electric motors.

[0003] The engine includes a box body. For the existing box body, for example, the Chinese patent document discloses an engine crankcase [Application No.: 202022415724.6; Authorization Publication No.: CN213775479U], which includes a crankcase body. An oil return storage chamber is provided in the crankcase. A vertical partition is fixedly connected to the bottom inside the oil return storage chamber. The partition divides the oil return storage chamber into a precipitation chamber and an oil pumping chamber. The precipitation chamber and the oil pumping chamber communicate at a certain height from the bottom.

[0004] For the crankcase of this structure, at the bottom of the oil pumping chamber, due to the blocking of the partition, there is always a certain amount of lubricating oil at the bottom of the oil pumping chamber. This part of the lubricating oil cannot participate in the circulation of the engine lubricating oil system, so it cannot play a lubricating effect, reducing the amount of oil participating in the lubricating oil system, which causes the problem of insufficient lubricating oil in the engine and reduces the lubricating effect of the engine. At the same time, there is a cavity inside the crankcase, and there is a similar oil accumulation cavity at the bottom of the cavity. The lubricating oil cannot flow out after entering the oil accumulation cavity during the circulating lubrication process and cannot participate in the lubricating oil circulation, resulting in insufficient lubricating oil in the engine. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art, and proposes an engine lubricating oil extraction structure. The technical problem to be solved is how to make the lubricating oil located at the bottom of the inner cavity of the box body be recycled and reduce the weight of the engine.

[0006] The purpose of the present invention can be achieved by the following technical solutions: An engine lubricating oil extraction structure, the engine includes a box body, and an oil accumulation cavity is provided at the bottom of the inner cavity of the box body. It is characterized in that the extraction structure includes a first oil pipe and an oil pump fixed in the box body. The oil inlet end of the first oil pipe is communicated with the bottom of the oil accumulation cavity, and the oil outlet end of the first oil pipe is connected to the oil pump through an oil passage in the box body.

[0007] The lubricating oil in the engine circulates. During the circulation process, part of the lubricating oil will fall into the oil sump. The oil sump is located at the bottom of the inner cavity of the box body, and the lubricating oil that falls into the oil sump cannot be recycled again. This extraction structure is provided with a first oil pipe in the box body. Through the first oil pipe and the oil passage, the lubricating oil in the oil sump is connected to the oil pump. Starting the oil pump can extract the lubricating oil in the oil sump, enabling this part of the lubricating oil to re-enter the lubricating oil circulation system of the engine and be recycled again, ensuring the oil quantity of the lubricating oil in the engine and improving the lubrication effect of the engine. The lubricating oil in the oil sump can be fully utilized, and compared with the prior art, the lubricating oil added to the engine can be reduced, which is equivalent to reducing the weight of the engine.

[0008] In the above-mentioned engine lubricating oil extraction structure, a first stop strip is protrudingly provided on the cavity wall of the oil sump. The first stop strip is arranged close to the oil inlet end of the first oil pipe. The first stop strip is located obliquely above the oil inlet end of the first oil pipe in the vertical direction. The first stop strip restricts the rotation of the first oil pipe. The oil inlet end of the first oil pipe is movable, and the first oil pipe can rotate around the oil outlet end of the first oil pipe. The setting of the first stop strip can block the oil inlet end of the first oil pipe, restrict the rotation of the first oil pipe, ensure the stable installation of the first oil pipe, ensure that the oil inlet end of the first oil pipe is located at a suitable oil extraction position, and ensure the stability of the extraction structure for extracting lubricating oil; the first stop strip is integrally formed when casting the box body, which is convenient for processing. The setting of the first stop strip eliminates the need to additionally add components in the box body when positioning the first oil pipe.

[0009] In the above-mentioned engine lubricating oil extraction structure, a second stop strip is protrudingly provided on the cavity wall of the oil sump. The second stop strip is arranged close to the oil outlet end of the first oil pipe. The second stop strip is located above the oil outlet end of the first oil pipe in the vertical direction. The second stop strip restricts the rotation of the first oil pipe. The oil inlet end of the first oil pipe is movable, and the first oil pipe can rotate around the oil outlet end of the first oil pipe. The setting of the second stop strip can block the oil outlet end of the first oil pipe, restrict the rotation of the first oil pipe. The second stop strip cooperates with the first stop strip to restrict the position of the first oil pipe, further ensuring the stability of the extraction structure for extracting lubricating oil; the second stop strip is integrally formed when casting the box body, which is convenient for processing. The setting of the second stop strip eliminates the need to additionally add components in the box body when positioning the first oil pipe.

[0010] In the above-mentioned engine lubricating oil extraction structure, the box body includes a main body and an end cover. On the inner side wall of the end cover close to the main body, there is a protruding abutting rib. When the main body and the end cover are fixedly connected, the abutting rib abuts against the oil outlet end of the first oil pipe. The setting of the abutting rib prevents the first oil pipe from moving in the left-right direction of the box body, ensuring the stability of the first oil pipe, and thus ensuring the stability of the extraction structure. At the same time, the abutting rib is integrally formed when casting the end cover, which is convenient for processing. The setting of the abutting rib eliminates the need to add extra parts in the box body when positioning the first oil pipe.

[0011] In the above-mentioned engine lubricating oil extraction structure, the first oil pipe includes a main pipe and a connecting pipe. The connecting pipe is perpendicular to the main pipe. The outer end of the connecting pipe is connected to the main pipe in communication. The inner end of the connecting pipe is embedded in the oil passage and is sealedly connected to the box body. When the main body and the end cover are fixedly connected, the abutting rib abuts against the outer end of the connecting pipe. In this structure, the first oil pipe is divided into two parts. The setting of the connecting pipe enables the first oil pipe to better take into account the oil passage and the abutting rib, making the installation of the first oil pipe more stable and ensuring the stability of the extraction structure.

[0012] In the above-mentioned engine lubricating oil extraction structure, the outer end face of the connecting pipe is a flat abutting surface. When the main body and the end cover are fixedly connected, the abutting rib abuts against the abutting surface. The setting of the abutting surface enables the abutting rib to better press the first oil pipe, making the installation of the first oil pipe more stable and ensuring the stability of the extraction structure.

[0013] In the above-mentioned engine lubricating oil extraction structure, the main pipe is close to the end cover and is arranged along the end cover. It makes rational use of space, positions the main pipe relatively outside, and facilitates the installation of the first oil pipe.

[0014] In the above-mentioned engine lubricating oil extraction structure, the extraction structure further includes a filter head. The filter head has an eccentrically arranged connecting hole. The oil inlet end of the first oil pipe is bent at a right angle. The oil inlet end of the first oil pipe passes through the connecting hole, and the connecting hole is close to the bottom cavity wall of the oil accumulation cavity. The filter head plays a filtering role to prevent impurities from entering and causing blockage. The right-angle bending of the oil inlet end of the first oil pipe enables the first oil pipe to better connect to the filter head, and at the same time, it is adapted to the shape of the oil accumulation cavity and the position of the main pipe. The connecting hole is eccentrically arranged and close to the bottom cavity wall of the oil accumulation cavity, enabling the extraction structure to better extract the lubricating oil in the oil accumulation cavity.

[0015] In the above-mentioned engine lubricating oil extraction structure, the extraction structure further includes a second oil pipe. The oil inlet end of the second oil pipe is connected to the oil passage in the box body, and the oil outlet end of the second oil pipe is connected to the oil pump. The second oil pipe plays a transitional role, enabling the oil accumulation cavity to be connected to the oil pump.

[0016] In the above-mentioned engine lubricating oil extraction structure, the second oil pipe is located at the bottom of the box body, and the oil passage is located in the cavity wall at the bottom of the box body. Matching the position of the oil sump, the space is reasonably utilized.

[0017] Compared with the prior art, an engine lubricating oil extraction structure provided by the present invention has the following advantages:

[0018] 1. This extraction structure extracts the lubricating oil in the oil sump and recycles it again, ensuring the amount of lubricating oil in the engine, improving the lubrication effect of the engine, enabling all the lubricating oil added to the engine to be recycled, and reducing the lubricating oil added to the engine compared with the prior art, which is equivalent to reducing the weight of the engine.

[0019] 2. This extraction structure limits the first oil pipe by setting the first stop strip, the second stop strip and the abutting convex strip. At the same time, the first stop strip and the second stop strip are integrally cast with the main body, and the abutting convex strip is integrally cast with the end cover, so that no additional parts need to be added to the box body when positioning the first oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of this engine lubricating oil extraction structure.

[0021] Figure 2 is the layout schematic diagram of the first oil pipe, the oil passage and the second oil pipe of this extraction structure.

[0022] Figure 3 is the structural schematic diagram at the first oil pipe of this extraction structure.

[0023] In the figure, 1. Box body; 11. Oil passage; 12. Main body; 13. End cover; 131. Abutting convex strip; 2. Oil sump; 3. First oil pipe; 31. Main pipe; 32. Connecting pipe; 321. Abutting surface; 4. Oil pump; 5. First stop strip; 6. Second stop strip; 7. Filter head; 71. Connecting hole; 8. Second oil pipe. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0025] As Figure 1 shown, the engine includes a box body 1, and the extraction structure includes an oil passage 11, a first oil pipe 3, an oil pump 4, a filter head 7 and a second oil pipe 8.

[0026] As Figure 3As shown, an oil accumulation chamber 2 is provided at the bottom of the inner cavity of the box body 1. The first oil pipe 3 is located in the oil accumulation chamber 2. The first oil pipe 3 includes a main pipe 31 and a connecting pipe 32. The connecting pipe 32 is perpendicular to the main pipe 31. The outer end of the connecting pipe 32 is communicated with the main pipe 31. The inner end of the connecting pipe 32 is embedded in the oil passage 11 and is hermetically connected to the box body 1. The filter head 7 has an eccentric connecting hole 71. The oil inlet end of the first oil pipe 3 is bent at a right angle and is inserted into the connecting hole 71. The connecting hole 71 is close to the bottom cavity wall of the oil accumulation chamber 2.

[0027] On the cavity wall of the oil accumulation chamber 2, a first retaining strip 5 protrudes and is inclined, and a second retaining strip 6 protrudes. The first retaining strip 5 is arranged close to the oil inlet end of the first oil pipe 3. The first retaining strip 5 is located obliquely above the oil inlet end of the first oil pipe 3 in the vertical direction, and the first retaining strip 5 restricts the rotation of the first oil pipe 3. The second retaining strip 6 is arranged close to the oil outlet end of the first oil pipe 3. The second retaining strip 6 is located above the oil outlet end of the first oil pipe 3 in the vertical direction, and the second retaining strip 6 restricts the rotation of the first oil pipe 3.

[0028] As Figure 2 shown, the box body 1 includes a main body 12 and an end cover 13. The main body 12 and the end cover 13 are fixedly connected by fasteners. The main pipe 31 is close to the end cover 13 and is arranged along the end cover 13. The outer end face of the connecting pipe 32 is a flat abutting surface 321. On the inner side wall of the end cover 13 close to the main body 12, there is a protruding abutting rib 131. When the main body 12 and the end cover 13 are fixedly connected, the abutting rib 131 abuts on the oil outlet end of the first oil pipe 3. Specifically, the abutting rib 131 abuts on the abutting surface 321 of the connecting pipe 32.

[0029] The oil pump 4 is fixed in the box body 1. The second oil pipe 8 is located at the bottom of the box body 1. The oil passage 11 is located in the cavity wall at the bottom of the box body 1. The oil inlet end of the second oil pipe 8 is communicated with the oil passage 11 in the box body 1. The oil outlet end of the second oil pipe 8 is connected to the oil pump 4, so that the oil outlet end of the first oil pipe 3 is connected to the oil pump 4 through the oil passage 11 and the second oil pipe 8 in the box body 1.

[0030] During operation, the rotation of the crankshaft of the engine drives the oil pump 4 to work. The oil pump 4 works to extract the lubricating oil in the oil accumulation chamber 2 through the second oil pipe 8, the oil passage 11 and the first oil pipe 3, so that this part of the lubricating oil can enter the lubricating oil circulation system of the engine.

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0032] Although terms such as housing 1, oil passage 11, main body 12, end cover 13, abutting rib 131, oil accumulation chamber 2, first oil pipe 3, main pipe 31, connecting pipe 32, abutting surface 321, oil pump 4, first stop bar 5, second stop bar 6, filter head 7, connecting hole 71, second oil pipe 8, etc. are used more frequently in this text, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any kind of additional limitation is contrary to the spirit of the present invention.

Claims

1. An engine lubricating oil extraction structure, the engine includes a box body (1), and the bottom of the inner cavity of the box body (1) has an oil accumulation cavity (2). It is characterized in that: The extraction structure includes a first oil pipe (3) and an oil pump (4) fixed in the box body (1). The inlet end of the first oil pipe (3) is communicated with the bottom of the oil accumulation cavity (2), and the outlet end of the first oil pipe (3) is connected to the oil pump (4) through an oil passage (11) in the box body (1). The box body (1) includes a main body (12) and an end cover (13). A protruding abutting rib (131) is provided on the inner side wall of the end cover (13) close to the main body (12). When the main body (12) and the end cover (13) are fixedly connected, the abutting rib (131) abuts on the outlet end of the first oil pipe (3). The first oil pipe (3) includes a main pipe (31) and a connecting pipe (32). The connecting pipe (32) is perpendicular to the main pipe (31). The outer end of the connecting pipe (32) is communicated with the main pipe (31). The inner end of the connecting pipe (32) is embedded in the oil passage (11) and is hermetically connected to the box body (1). When the main body (12) and the end cover (13) are fixedly connected, the abutting rib (131) abuts on the outer end of the connecting pipe (32).

2. An engine lubricating oil extraction structure according to claim 1, It is characterized in that: A first retaining strip (5) is protruding on the cavity wall of the oil accumulation cavity (2). The first retaining strip (5) is arranged close to the inlet end of the first oil pipe (3). The first retaining strip (5) is located obliquely above the inlet end of the first oil pipe (3) in the vertical direction. The first retaining strip (5) restricts the rotation of the first oil pipe (3).

3. An engine lubricating oil extraction structure according to claim 1, It is characterized in that: A second retaining strip (6) is protruding on the cavity wall of the oil accumulation cavity (2). The second retaining strip (6) is arranged close to the outlet end of the first oil pipe (3). The second retaining strip (6) is located above the outlet end of the first oil pipe (3) in the vertical direction. The second retaining strip (6) restricts the rotation of the first oil pipe (3).

4. An engine lubricating oil extraction structure according to claim 1 or 2 or 3, It is characterized in that: The outer end face of the connecting pipe (32) is a flat abutting surface (321). When the main body (12) and the end cover (13) are fixedly connected, the abutting rib (131) abuts on the abutting surface (321).

5. An engine lubricating oil extraction structure according to claim 1 or 2 or 3, It is characterized in that: The main pipe (31) is close to the end cover (13) and is arranged along the end cover (13).

6. An engine lubricating oil extraction structure according to claim 1 or 2 or 3, It is characterized in that: The extraction structure further includes a filter head (7), and an eccentrically arranged connection hole (71) is provided in the filter head (7). The oil inlet end of the first oil pipe (3) is bent at a right angle, and the oil inlet end of the first oil pipe (3) is inserted into the connection hole (71), and the connection hole (71) is close to the bottom cavity wall of the oil accumulation cavity (2).

7. An engine lubricating oil extraction structure according to claim 1 or 2 or 3, characterized in that the extraction structure further includes a second oil pipe (8), the oil inlet end of the second oil pipe (8) is communicated with the oil passage (11) in the box body (1), and the oil outlet end of the second oil pipe (8) is connected to the oil pump (4).

8. An engine lubricating oil extraction structure according to claim 7, characterized in that the second oil pipe (8) is located at the bottom of the box body (1), and the oil passage (11) is located in the cavity wall at the bottom of the box body (1).

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