Crankcase shell and engine assembly

Abstract

The utility model belongs to the technical field of engines, and discloses a crankcase shell and an engine assembly, the crankcase shell comprises an upper crankcase, an oil pan and a baffle, the upper crankcase is provided with an oil return port, and the oil return port is used for being communicated with an oil liquid outlet of an oil-gas separator and used for oil liquid to pass through; therefore, oil separated by the oil-gas separator can enter the oil return port through the oil outlet; the oil pan is connected to the upper crankcase, and an oil collecting cavity used for storing oil is formed in the bottom of the oil pan. The baffle is connected to the upper crankcase, the baffle is arranged between the oil return opening and the oil collecting cavity, and the baffle is provided with a first through hole for oil to pass through, so that the oil entering the oil return opening can flow to the baffle and flow into the oil collecting cavity through the first through hole of the baffle, and oil collection is completed. Part of oil in the oil collecting cavity can be prevented from flowing back into the oil return opening through the baffle, and the situation that a large amount of oil is poured into the oil return opening and the oil-gas separator can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a crankcase housing and an engine assembly. Background Art

[0002] When the engine is working, some combustible mixture and combustion products will leak into the crankcase through the cylinder and piston ring. Therefore, the crankcase is usually equipped with a ventilation system to extract the oil and gas in the crankcase and separate them through an oil-gas separator. The separated engine oil flows into the oil pan through the return oil line.

[0003] The above crankcase ventilation system is also used in small ships such as yachts and lifeboats. These ships are prone to violent shaking and tilting during navigation, and sometimes even flip 180 degrees, causing the oil in the oil pan to easily flow back into the oil return line, causing the oil return line to be blocked. In addition, the oil may also flow into the oil-gas separator through the oil return line, causing damage to the oil-gas separator. Utility Model Content

[0004] According to one aspect of the present invention, the present invention provides a crankcase housing to solve the problem in the prior art that some ships are prone to violent shaking and tilting, causing the oil in the oil pan to easily flow back into the oil return line and even into the oil-gas separator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Crankcase housing, including:

[0007] The upper crankcase has an oil return port, the oil return port being connected to the oil outlet of the oil-gas separator and used for oil to pass through;

[0008] An oil pan connected to the upper crankcase, the bottom of the oil pan having an oil collecting chamber for storing oil;

[0009] A baffle is connected to the upper crankcase, the baffle is arranged between the oil return port and the oil collecting chamber, and the baffle is provided with a first through hole for oil to pass through.

[0010] As a preferred solution of the crankcase housing, a groove is provided on the surface of the baffle on the side close to the oil return port, and the first through hole is provided on the bottom wall of the groove.

[0011] As a preferred solution of the crankcase housing, a plurality of the grooves are provided, the bottom walls of the plurality of the grooves are all provided with the first through hole, and any two adjacent grooves are connected through the oil groove.

[0012] As a preferred solution of the crankcase housing, the groove wall of the oil groove is provided with reinforcing ribs, and the extending direction of the reinforcing ribs is perpendicular to the length direction of the baffle.

[0013] As a preferred solution for the crankcase housing, the baffle further has two second through holes, which are respectively located at both ends of the baffle along its length, and the cross-sectional areas of the two second through holes are both larger than the cross-sectional area of ​​the first through hole.

[0014] As a preferred solution of the crankcase housing, the hole wall of the second through hole extends toward the oil collecting chamber to form a flange structure.

[0015] As a preferred solution of the crankcase housing, the baffle is further provided with an oil dipstick tube avoidance hole for the oil dipstick tube to pass through.

[0016] As a preferred solution for the crankcase housing, the upper crankcase is provided with a first oil return passage communicating with the oil return port, and the lower side wall of the first oil return passage is tilted downward in a direction close to the baffle.

[0017] As a preferred solution for the crankcase housing, the first oil return passage is connected to the oil outlet of the oil-gas separator through a second oil return passage, the lower side wall of the second oil return passage is inclined, and the inclination angle of the lower side wall of the first oil return passage is the same as the inclination angle of the lower side wall of the second oil return passage.

[0018] According to another aspect of the present invention, an engine assembly is provided, comprising the above-mentioned crankcase housing, and also comprising a cylinder block, a ventilation system and an oil-gas separator, wherein the cylinder block is integrally formed with the upper crankcase, the ventilation system is used to extract the oil and gas inside the crankcase housing and transport them to the oil-gas separator, and the oil-gas separator is used to separate the oil and gas and discharge the separated oil into the oil collecting chamber.

[0019] The beneficial effects of the utility model are:

[0020] The present invention provides a crankcase housing, comprising an upper crankcase, an oil pan, and a baffle. The upper crankcase has an oil return port, which is used to communicate with the oil outlet of an oil-gas separator and is used for oil to pass through, so that oil separated by the oil-gas separator can enter the oil return port through the oil outlet. The oil pan is connected to the upper crankcase, and the bottom of the oil pan has an oil collecting chamber for storing oil. The baffle is connected to the upper crankcase, and the baffle is arranged between the oil return port and the oil collecting chamber. The baffle has a first through hole for oil to pass through, so that oil entering the oil return port can flow toward the baffle and flow into the oil collecting chamber through the first through hole of the baffle, completing the collection of the oil. In addition, if the vehicle tilts or even flips, the baffle can prevent some of the oil in the oil collecting chamber from flowing back into the oil return port, thereby preventing a large amount of oil from entering the oil return port and the oil-gas separator.

[0021] The present invention also provides an engine assembly comprising the crankcase housing described above, a cylinder block, a ventilation system, and an oil-gas separator. The cylinder block is integrally formed with the upper crankcase. The ventilation system is configured to extract oil and gas from the crankcase housing and transport them to the oil-gas separator. The oil-gas separator is configured to separate the oil and gas and discharge the separated oil into an oil collecting chamber. The crankcase housing is provided with a baffle, allowing oil from an oil return port to flow toward the baffle and into the oil collecting chamber through a first through-hole of the baffle. Furthermore, if the vehicle tilts or even flips, the baffle can prevent some of the oil in the oil collecting chamber from flowing back into the oil return port, thereby preventing a large amount of oil from entering the oil return port and the oil-gas separator, thereby preventing damage to the oil-gas separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional view of a crankcase housing in an embodiment of the present utility model;

[0023] Figure 2 This is a schematic structural diagram of a baffle in an embodiment of the present utility model;

[0024] Figure 3 It is a partial structural diagram of the upper crankcase in an embodiment of the present utility model.

[0025] In the picture:

[0026] 100, upper crankcase; 101, oil return port; 102, first oil return passage; 1021, connecting bolt avoidance protrusion;

[0027] 200, oil-gas separator; 201, second oil return channel;

[0028] 300, baffle; 301, first through hole; 302, groove; 303, oil trough; 3031, reinforcing rib; 304, second through hole; 3041, flanging structure; 305, oil dipstick tube avoidance hole. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] Crankcases are typically equipped with a ventilation system that extracts oil and gas from the crankcase and separates them through an oil-gas separator. The separated oil then flows through the return oil line into the oil pan. This crankcase ventilation system is also used on small vessels such as yachts and lifeboats. These vessels are prone to violent swaying and tilting during navigation, sometimes even flipping 180 degrees. This can cause the oil in the oil pan to flow back into the return oil line, causing blockage. Furthermore, the oil may also flow into the oil-gas separator through the return oil line, causing damage to the separator.

[0034] In response to the above problems, this embodiment provides a crankcase housing to solve the problem in the prior art that some ships are prone to violent shaking and tilting, causing the oil in the oil pan to easily flow back into the oil return line and even into the oil-gas separator. It can be used in the field of engine technology. Further, it can be applied to carrying vehicles, specifically passenger cars, commercial vehicles and other vehicles, or small ships such as yachts and lifeboats, or large passenger ships, large cargo ships and other types of ships.

[0035] Reference Figure 1-Figure 3 The crankcase housing includes an upper crankcase 100, an oil pan and a baffle 300. The upper crankcase 100 has an oil return port 101, which is used to communicate with the oil outlet of the oil-gas separator 200 and is used for oil to pass through, so that the oil separated by the oil-gas separator 200 can enter the oil return port 101 through the oil outlet; the oil pan is connected to the upper crankcase 100, and the bottom of the oil pan has an oil collecting chamber for storing oil; the baffle 300 is connected to the upper crankcase 100, and the baffle 300 is arranged between the oil return port 101 and the oil collecting chamber. The baffle 300 is provided with a first through hole 301 for oil to pass through, so that the oil entering the oil return port 101 can flow to the baffle 300 and flow into the oil collecting chamber through the first through hole 301 of the baffle 300, thereby completing the collection of the oil. In addition, if the carrier is tilted or even flipped, the baffle 300 can prevent part of the oil in the oil collecting chamber from flowing back into the oil return port 101, thereby preventing a large amount of oil from flowing into the oil return port 101 and the oil-gas separator 200.

[0036] Continue to refer to Figure 1-Figure 3 The baffle 300 has a groove 302 formed on its surface near the oil return port 101, and a first through-hole 301 formed in the bottom wall of the groove 302. The groove 302 guides the oil flowing out of the oil return port 101 to first converge in the groove 302 and then flow into the oil collecting chamber through the oil return port 101. Optionally, the baffle 300 is positioned horizontally, with the surface of the baffle 300 near the oil return port 101 serving as the upper surface of the baffle 300. This arrangement facilitates installation between the baffle 300 and the upper crankcase 100, while also facilitating the flow of oil into the groove 302 and further dripping out of the first through-hole 301.

[0037] Continue to refer to Figure 1-Figure 3A plurality of grooves 302 are provided, and the bottom walls of each of the plurality of grooves 302 are each provided with a first through-hole 301. Any two adjacent grooves 302 are connected via an oil groove 303. Optionally, three grooves 302 are provided, spaced apart along the length of the baffle 300. The length of the baffle 300 is generally parallel to the axis of the engine crankshaft and can be aligned with or perpendicular to the fore-aft direction of the vehicle. This allows oil to drip from different locations along the length of the baffle 300. Further, optionally, the bottom wall of each groove 302 is provided with two first through-holes 301, spaced apart along the width of the baffle 300. This allows oil to drip from different locations along the width of the baffle 300. This arrangement ensures smooth oil dripping when the vehicle pitches or heels. It is understandable that in other embodiments, the grooves 302 can also be set to other numbers as needed, such as two, four or five; the first through holes 301 in the grooves 302 can also be set to other numbers as needed, such as three, four or five, and the number of first through holes 301 in different grooves 302 can also be different.

[0038] Continue to refer to Figure 1-Figure 3 In this embodiment, the three grooves 302 are spaced apart along the length of the baffle 300, and an oil-passing groove 303 is provided between the grooves 302. This results in a weaker structural strength near the oil-passing grooves 303, particularly along the width of the baffle 300, where deformation is more likely to occur near the walls of the oil-passing grooves 303. To address this, in this embodiment, reinforcing ribs 3031 are provided along the walls of the oil-passing grooves 303. The ribs 3031 extend perpendicularly to the length of the baffle 300 to increase the structural strength of the baffle 300.

[0039] Continue to refer to Figure 1-Figure 3In this embodiment, one of the grooves 302 is located directly below the oil return port 101, specifically, the groove 302 in the middle position is located directly below the oil return port 101, so that the oil flowing in through the oil return port 101 first enters the groove 302 in the middle position, and part of the oil drips through the first through hole 301 opened in the groove 302. When there is more oil or the carrying vehicle tilts, other oil will also enter the other grooves 302 through the oil groove 303 and drip from the first through hole 301 opened in the other grooves 302. The baffle 300 also has two second through-holes 304, one at each end along its length. The cross-sectional area of ​​each second through-hole 304 is larger than that of the first through-hole 301. This allows oil to flow toward the ends of the baffle 300 along its length, rather than through the first through-hole 301, if the vehicle tilts. This allows the oil to flow into the oil collecting chamber through the second through-holes 304, which have a larger cross-sectional area. Both the first through-hole 301 and the second through-hole 302 can be formed by stamping.

[0040] Optionally, an oil groove 303 is also provided between the second through hole 304 and the adjacent groove 302 , and the two can be communicated through the oil groove 303 .

[0041] Continue to refer to Figure 1-Figure 3 Since the second through hole 304 is relatively large, the structural strength of the position near it will be affected to a certain extent. In this regard, the hole wall of the second through hole 304 extends toward the oil collecting chamber to form a flange structure 3041, thereby increasing the structural strength of the side wall of the second through hole 304. In addition, the flange structure 3041 can also play a certain drainage role on the oil.

[0042] Continue to refer to Figure 1-Figure 3 The baffle 300 is also provided with an oil dipstick tube avoidance hole 305 for the oil dipstick tube to pass through. The oil dipstick tube can be taken out so that the operator can know the height of the oil. The oil dipstick tube avoidance hole 305 can facilitate the installation of the oil dipstick tube.

[0043] Continue to refer to Figure 1-Figure 3The upper crankcase 100 is provided with a first oil return passage 102 connected to the oil return port 101. The first oil return passage 102 is connected to the inner cavity of the upper crankcase 100. The first oil return passage 102 is located downstream of the oil return port 101, that is, when the oil flows normally, it will flow into the first oil return passage 102 through the oil return port 101. In the direction close to the baffle 300, the lower side wall of the first oil return passage 102 is tilted downward. In this arrangement, compared with the solution of setting the lower side wall of the first oil return passage 102 horizontally, the lower side wall of the first oil return passage 102 is tilted downward, so that after the oil flows into the first oil return passage 102 through the oil return port 101, it can flow quickly toward the location of the baffle 300 under the guidance of its lower side wall, thereby avoiding the accumulation of oil on the lower side wall of the first oil return passage 102.

[0044] Optionally, in this embodiment, the upper crankcase 100 and the oil pan are connected by connecting bolts. If the connecting bolts are located exactly where the first oil return channel 102 is located, a connecting bolt avoidance protrusion 1021 is provided on the lower side wall of the first oil return channel 102 at a position corresponding to the connecting bolts to facilitate the installation of the connecting bolts.

[0045] Continue to refer to Figure 1-Figure 3 The first oil return passage 102 is connected to the oil outlet of the oil-gas separator 200 via the second oil return passage 201. The lower sidewall of the second oil return passage 201 is inclined, and the inclination angle of the lower sidewall of the first oil return passage 102 is the same as the inclination angle of the lower sidewall of the second oil return passage 201. This ensures that the flow resistance encountered by the oil in the first oil return passage 102 is the same as the flow resistance encountered in the second oil return passage 201, further enhancing the flow rate of the oil in the second oil return passage 201 and the first oil return passage 102. During machining of the first oil return passage 102, the draft angle can be controlled so that the inclination angle of its lower sidewall is the same as the inclination angle of the lower sidewall of the second oil return passage 201.

[0046] This embodiment also provides an engine assembly, comprising the crankcase housing described above, a cylinder block, a ventilation system, and an oil-gas separator 200. The cylinder block is integrally formed with the upper crankcase 100. The ventilation system is used to extract oil and gas from the crankcase housing and transport them to the oil-gas separator 200. The oil-gas separator 200 is used to separate the oil and gas and discharge the separated oil into an oil collection chamber. The crankcase housing is provided with a baffle 300. Oil from the oil return port 101 can flow toward the baffle 300 and into the oil collection chamber through the first through-hole 301 of the baffle 300. In addition, if the vehicle tilts or even flips, the baffle 300 can prevent some of the oil in the oil collection chamber from flowing back into the oil return port 101, thereby preventing a large amount of oil from entering the oil return port 101 and the oil-gas separator 200, thereby preventing damage to the oil-gas separator 200.

[0047] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Crankcase housing, characterized in that include: The upper crankcase (100) has an oil return port (101), wherein the oil return port (101) is used to communicate with the oil outlet of the oil-gas separator (200) and is used for oil to pass through; An oil pan connected to the upper crankcase (100), the bottom of the oil pan having an oil collecting chamber for storing oil; A baffle (300) is connected to the upper crankcase (100), and is arranged between the oil return port (101) and the oil collecting chamber. The baffle (300) is provided with a first through hole (301) for oil to pass through.

2. The crankcase housing according to claim 1, characterized in that A groove (302) is provided on the surface of the baffle (300) on the side close to the oil return port (101), and the first through hole (301) is provided on the bottom wall of the groove (302).

3. The crankcase housing according to claim 2, characterized in that There are a plurality of grooves (302), and the bottom walls of the plurality of grooves (302) are each provided with the first through hole (301), and any two adjacent grooves (302) are connected via the oil groove (303).

4. The crankcase housing according to claim 3, characterized in that The groove wall of the oil groove (303) is provided with a reinforcing rib (3031), and the extending direction of the reinforcing rib (3031) is perpendicular to the length direction of the baffle (300).

5. The crankcase housing according to claim 2, wherein: The baffle (300) is further provided with two second through holes (304), the two second through holes (304) being respectively provided at both ends of the baffle (300) along its length direction, and the cross-sectional areas of the two second through holes (304) are both larger than the cross-sectional area of ​​the first through hole (301).

6. The crankcase housing according to claim 5, characterized in that The hole wall of the second through hole (304) extends toward the oil collecting chamber to form a flange structure (3041).

7. The crankcase housing according to any one of claims 1 to 6, characterized in that: The baffle (300) is further provided with an oil dipstick tube avoidance hole (305) for the oil dipstick tube to pass through.

8. The crankcase housing according to any one of claims 1 to 6, characterized in that: The upper crankcase (100) is provided with a first oil return passage (102) communicating with the oil return port (101), and the lower side wall of the first oil return passage (102) is tilted downward in a direction close to the baffle (300).

9. The crankcase housing according to claim 8, characterized in that The first oil return passage (102) is connected to the oil outlet of the oil-gas separator (200) via a second oil return passage (201), and the lower side wall of the second oil return passage (201) is inclined. The inclination angle of the lower side wall of the first oil return passage (102) is the same as the inclination angle of the lower side wall of the second oil return passage (201).

10. The engine assembly is characterized in that: It comprises a crankcase housing as described in any one of claims 1 to 9, and also comprises a cylinder block, a ventilation system and an oil-gas separator (200), wherein the cylinder block and the upper crankcase (100) are integrally formed, the ventilation system is used to extract the oil and gas inside the crankcase housing and transport them to the oil-gas separator (200), and the oil-gas separator (200) is used to separate the oil and gas and discharge the separated oil into the oil collecting chamber.

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