Engine block, engine assembly and vehicle

Abstract

This utility model belongs to the field of vehicle technology and discloses an engine body, an engine assembly, and a vehicle. The engine body includes a cylinder block, a main bearing cap, and a through bolt, and has a main oil passage. The cylinder block has a first bolt hole, and the main bearing cap has a second bolt hole. The through bolt passes through both the first and second bolt holes. The main oil passage is used for lubricating oil to pass through. There is a gap between the first bolt hole and the through bolt, and there is a gap between the second bolt hole and the through bolt. Multiple branch oil passages are connected downstream of the main oil passage, some of which connect to the gaps, so that the lubricating oil in the main oil passage can enter the gaps through the aforementioned branch oil passages. High-pressure lubricating oil provides damping to reduce the vibration amplitude of the through bolt relative to the cylinder block and the main bearing cap, preventing the through bolt from loosening. At the same time, since no additional buffer structure is required, the overall structure is simple.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to engine body, engine assembly and vehicle. Background Technology

[0002] The main bearing through bolt passes through the cylinder block and is threaded to the main bearing cap to secure the main bearing cap to the cylinder block, thus providing stable support for the crankshaft and ensuring its normal operation and power output. During engine operation, the rotation of the crankshaft causes vibrations in the main bearing cap and cylinder block, which in turn causes frequent impacts on the main bearing through bolt, leading to loosening or even detachment of the main bearing through bolt.

[0003] To address this, relevant technologies typically incorporate a buffer structure on the outside of the main bearing through bolt to reduce vibration and prevent loosening. However, this buffer structure inevitably complicates the overall structure and increases the difficulty of manufacturing. Utility Model Content

[0004] According to one aspect of the present invention, the present invention provides an engine body to solve the problem that in the prior art, the main bearing through bolt is easily subjected to frequent impacts, which leads to the main bearing through bolt being easy to loosen or even fall off, while if a buffer structure is set, it will lead to the complexity of the overall structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The engine body includes a cylinder block, a main bearing cap, and a through bolt, and has a main oil passage. The cylinder block has a first bolt hole, the main bearing cap has a second bolt hole, the through bolt passes through both the first bolt hole and the second bolt hole, and the main oil passage is for lubricating oil to pass through.

[0007] There is a gap between the first bolt hole and the through bolt, and there is a gap between the second bolt hole and the through bolt. The downstream of the main oil passage is connected to multiple branch oil passages, some of which are connected to the gaps.

[0008] As a preferred embodiment of the engine body, among the plurality of branch oil passages, the branch oil passage that communicates with the gap is the first branch oil passage, and the remaining branch oil passages are the second branch oil passages, wherein the cross-sectional area of ​​the second branch oil passage is larger than the cross-sectional area of ​​the first branch oil passage.

[0009] As a preferred embodiment of the engine body, multiple through bolts, first bolt holes, and second bolt holes are provided, with each of the multiple through bolts, first bolt holes, and second bolt holes corresponding to one another. The engine body also includes an oil inlet pipe, the inner cavity of which is a branch oil passage communicating with the gap. The oil inlet pipe includes a first pipe, a pipe connector, and multiple second pipes. The pipe connector has multiple connecting ends. The first pipe and the multiple second pipes are respectively connected to the multiple connecting ends of the pipe connector. The inner cavity of the first pipe communicates with the main oil passage, and the inner cavities of the multiple second pipes communicate with the multiple gaps corresponding to one another.

[0010] As a preferred embodiment of the engine body, one end of the through bolt extends out of the cylinder block and is threadedly connected to the first nut, while the other end of the through bolt extends out of the main bearing cap and is threadedly connected to the second nut.

[0011] As a preferred embodiment of the engine body, a first sealing structure is provided between the outer wall of the through bolt and the hole wall of the first bolt hole, and a second sealing structure is provided between the outer wall of the through bolt and the hole wall of the second bolt hole.

[0012] As a preferred embodiment of the engine body, both the first sealing structure and the second sealing structure include one or more sealing rings.

[0013] As a preferred embodiment of the engine body, it also includes a tie bolt, the cylinder block has a third bolt hole, the main bearing cap has a fourth bolt hole, the tie bolt passes through both the third bolt hole and the fourth bolt hole, the extension direction of the tie bolt is perpendicular to the extension direction of the through bolt, the first end of the tie bolt extends out of the cylinder block and is threadedly connected to the tie bolt nut, and the second end of the tie bolt is threadedly connected to the main bearing cap.

[0014] As a preferred embodiment of the engine body, the fourth bolt hole communicates with the second bolt hole, and the second end of the tie bolt is sealed to the main bearing cap.

[0015] According to another aspect of the present invention, an engine assembly is provided, including the aforementioned engine body, an oil pan, and an oil pump, wherein the oil pan is used to store lubricating oil, and the oil pump is used to supply the lubricating oil in the oil pan to the main oil passage.

[0016] According to another aspect of the present invention, a vehicle is provided, characterized in that it includes the aforementioned engine assembly.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides an engine body, including a cylinder block, a main bearing cap, and a through bolt, and has a main oil passage. The cylinder block has a first bolt hole, and the main bearing cap has a second bolt hole. The through bolt passes through both the first and second bolt holes. The main oil passage is for lubricating oil to pass through. There is a gap between the first bolt hole and the through bolt, and a gap between the second bolt hole and the through bolt. Multiple branch oil passages are connected downstream of the main oil passage, some of which connect to the gaps, allowing lubricating oil in the main oil passage to enter the gaps through the branch oil passages. High-pressure lubricating oil provides damping to reduce the vibration amplitude of the through bolt relative to the cylinder block and the main bearing cap, preventing the through bolt from loosening. Furthermore, since no additional buffer structure is required, the overall structure is simple. During engine operation, the lubricating oil can absorb the vibration energy of the through bolt and convert it into heat, which is then carried away and released by the flow of the lubricating oil.

[0019] This utility model also provides an engine assembly, including the aforementioned engine body, an oil pan, and an oil pump. The oil pan stores lubricating oil, and the oil pump supplies the lubricating oil from the oil pan to the main oil passage, thereby providing lubrication to various parts of the engine. In this engine body, multiple branch oil passages are connected downstream of the main oil passage, some of which are interconnected, allowing lubricating oil from the main oil passage to enter the gap through these branch oil passages. High-pressure lubricating oil provides damping to reduce the vibration amplitude of the through bolts relative to the cylinder block and main bearing cap, preventing the through bolts from loosening. Furthermore, since no additional buffer structure is required, the overall structure is simple.

[0020] This utility model also provides a vehicle including the above-mentioned engine assembly. The engine body in the engine assembly can reduce the vibration amplitude of the through bolt relative to the cylinder block and the main bearing cap, and prevent the through bolt from loosening. At the same time, since no additional buffer structure is required, the overall structure is simple. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the engine body in an embodiment of the present invention;

[0022] Figure 2 This is a first sectional view of the engine body in an embodiment of this utility model;

[0023] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a second sectional view of the engine body in an embodiment of this utility model;

[0025] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0026] In the picture:

[0027] 1. Cylinder block; 11. Oil supply passage;

[0028] 2. Main bearing cover;

[0029] 3. Through bolt; 31. Clearance; 32. Sealing ring; 34. First nut; 35. Second nut;

[0030] 41. First bolt hole; 42. Second bolt hole; 43. Oil outlet;

[0031] 5. Lubricating oil pipe;

[0032] 6. Oil inlet pipeline; 61. First pipeline; 62. Pipe fitting; 63. Second pipeline;

[0033] 7. Tie bolt; 71. Third bolt hole; 72. Fourth bolt hole; 73. Tie bolt nut. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] During engine operation, the rotation of the crankshaft causes vibrations in the main bearing cap and cylinder block, resulting in frequent impacts on the main bearing through bolts, which can lead to loosening or even detachment. To address this, relevant technologies typically incorporate a buffer structure on the outside of the main bearing through bolts to reduce vibration and prevent loosening. However, this buffer structure inevitably complicates the overall structure and increases manufacturing difficulty.

[0039] In response, this embodiment provides an engine body to solve the problem that in the prior art, the main bearing through bolt is easily subjected to frequent impacts, which leads to the main bearing through bolt being easy to loosen or even fall off. However, if a buffer structure is set, it will lead to the complexity of the overall structure. This can be used in the field of vehicle technology.

[0040] Reference Figures 1-5 The engine body includes a cylinder block 1, a main bearing cap 2, and a through bolt 3, and has a main oil passage. The cylinder block 1 has a first bolt hole 41, and the main bearing cap 2 has a second bolt hole 42. The through bolt 3 passes through both the first bolt hole 41 and the second bolt hole 42. The main oil passage is used for the passage of lubricating oil. The main oil passage is connected to the lubricating oil source, specifically to the oil pump, and is used to deliver lubricating oil to the engine's components to be lubricated, such as the crankshaft.

[0041] Continue to refer to Figures 1-5 There is a gap 31 between the first bolt hole 41 and the through bolt 3, and a gap 31 between the second bolt hole 42 and the through bolt 3. Multiple branch oil passages connect downstream of the main oil passage, some of which connect to the gaps 31. This allows lubricating oil from the main oil passage to enter the gaps 31 through these branch oil passages. High-pressure lubricating oil provides damping to reduce the vibration amplitude of the through bolt 3 relative to the cylinder block 1 and the main bearing cap 2, preventing the through bolt 3 from loosening. Furthermore, since no additional buffer structure is required, the overall structure is simple. During engine operation, the lubricating oil absorbs the vibration energy of the through bolt 3 and converts it into heat. The heat generated by the lubricating oil is carried away and released with the flow of the lubricating oil.

[0042] Optionally, the first bolt hole 41 has an oil inlet for lubricating oil to flow in and an oil outlet 43 for lubricating oil to flow out. Lubricating oil can flow into the gap 31 through the oil inlet. In addition, lubricating oil can flow to the oil outlet pipeline through the oil outlet 41. The oil outlet pipeline is connected to the oil pan or to the lubricating oil passage so that the lubricating oil can flow out of the gap 31. The oil inlet and oil outlet 43 are both located on the side wall of the first bolt hole 41 to facilitate the connection of the oil inlet pipeline 6 and the oil outlet pipeline. Alternatively, the oil inlet and oil outlet 43 can both be located on the side wall of the second bolt hole 42, or one of the oil inlet and oil outlet 43 can be located in the first bolt hole 41 and the other in the second bolt hole 42.

[0043] Optionally, the oil inlet and oil outlet 43 can be located in the middle of the gap 31 to further facilitate the connection of the oil inlet pipe 6 and the oil outlet pipe; in addition, the oil inlet and oil outlet 43 can be located at both ends of the gap 31 respectively to give the lubricating oil a longer flow path, so that the lubricating oil can exchange heat more fully with the through bolt 3.

[0044] Continue to refer to Figures 1-5 Among the multiple branch oil passages, the branch oil passage connected to the gap 31 is the first branch oil passage, and the remaining branch oil passages are the second branch oil passages. The cross-sectional area of ​​the second branch oil passage is larger than that of the first branch oil passage, so that the lubricating oil flows preferentially in the second branch oil passage to ensure the supply of lubricating oil to the crankshaft waiting lubrication structure, while only a small amount of lubricating oil flows into the gap 31 through the first branch oil passage.

[0045] Continue to refer to Figures 1-5Multiple through bolts 3, multiple first bolt holes 41 and multiple second bolt holes 42 are provided, and the multiple through bolts 3, multiple first bolt holes 41 and multiple second bolt holes 42 are arranged one-to-one. The engine body also includes an oil inlet pipe 6. The inner cavity of the oil inlet pipe 6 is a branch oil passage communicating with the gap 31. The oil inlet pipe 6 includes a first pipe 61, a pipe connector 62 and multiple second pipes 63. The pipe connector 62 has multiple connecting ends. The first pipe 61 and multiple second pipes 63 are respectively connected to the multiple connecting ends of the pipe connector 62. The inner cavity of the first pipe 61 is connected to the main oil passage. The inner cavities of the multiple second pipes 63 are connected one-to-one with the multiple gaps 31, so that the lubricating oil can flow into the inner cavity of the first pipe 61 and further branch to the multiple second pipes 63, so that the lubricating oil flows to the multiple gaps 31. In addition, the first pipe 61 and the multiple second pipes 63 are interconnected through the pipe connector 62. The structure is simple and the connection is reliable. In this embodiment, two through bolts 3, two first bolt holes 41, two second bolt holes 42, and two second pipes 63 are provided, and the pipe connector 62 is a tee pipe. In other embodiments, three through bolts 3, three first bolt holes 41, three second bolt holes 42, and three second pipes 63 are provided, and the pipe connector 62 is a four-way pipe. Furthermore, the cross-sectional area of ​​the second branch oil passage is larger than the cross-sectional area of ​​the first pipe 61. To accommodate the flow rate of lubricating oil in the first pipe 61 and the second pipes 63, the inner diameters of all second pipes 63 are equal, and the inner diameters of multiple second pipes 63 are smaller than the inner diameter of the first pipe 61.

[0046] Optionally, only one second branch oil passage is provided, and it is used to supply lubricating oil to the crankshaft. The engine body also includes a lubricating oil pipe 5, the middle part of which is connected to the oil inlet pipe 6. The portion of the lubricating oil pipe 5 upstream of the connection between the lubricating oil pipe 5 and the oil inlet pipe 6 is the main oil passage, and the portion downstream of the connection is the second branch oil passage. In this embodiment, the inner diameter of the lubricating oil pipe 5 is the same at different locations, and the cross-sectional area of ​​the main oil passage is equal to the cross-sectional area of ​​the second branch oil passage. In other embodiments, the lubricating oil pipe 5 can also be a reducing pipe, with the cross-sectional area of ​​the main oil passage slightly larger than that of the second branch oil passage.

[0047] Optionally, the cylinder block 1 has an oil supply passage 11, one end of which is connected to a lubricating oil source, and the other end is connected to the inner cavity of the lubricating oil pipe 5, thereby supplying lubricating oil to the main oil passage. In addition, the oil supply passage 11 can also supply lubricating oil to other parts of the engine.

[0048] For details regarding the connection scheme between the through bolt 3 and the cylinder block 1 and the main bearing cap 2 in the engine body, please refer to [reference needed]. Figures 1-5One end of the through bolt 3 extends out of the cylinder body 1 and is threadedly connected to the first nut 34. The other end of the through bolt 3 extends out of the main bearing cap 2 and is threadedly connected to the second nut 35. The through bolt 3 can be installed using a hydraulic tensioning process. Specifically, the through bolt 3 is first inserted into the through bolt hole 4 and then threadedly connected to both the first nut 34 and the second nut 35. At this time, an external force is applied directly to the through bolt 3 in a direction away from the first nut 34 using a hydraulic cylinder or similar structure, causing the through bolt 3 to be stretched within its elastic deformation zone. At this point, the second nut 35 separates from the surface of the main bearing cap 2, and can be tightened to secure the through bolt 3.

[0049] Continue to refer to Figures 1-5 A first sealing structure is provided between the outer wall of the through bolt 3 and the wall of the first bolt hole 41, and a second sealing structure is provided between the outer wall of the through bolt 3 and the wall of the second bolt hole 42. Thus, the first sealing structure creates a seal between the outer wall of the through bolt 3 and the wall of the first bolt hole 41, and the second sealing structure creates a seal between the outer wall of the through bolt 3 and the wall of the second bolt hole 42. The connection between the inner cavity of the second pipeline 63 and the gap 31, as well as the oil outlet 43, are located between the first sealing structure and the second sealing structure.

[0050] Optionally, both the first sealing structure and the second sealing structure include one or more sealing rings 32. In this embodiment, both the first sealing structure and the second sealing structure include one sealing ring 32. However, in other embodiments, to enhance the sealing effect, the first sealing structure and the second sealing structure may also include multiple sealing rings 32. The inner wall of the sealing ring 32 is tightly fitted against the through bolt 3, and the outer wall is tightly fitted against the hole wall of the first bolt hole 41 or the second bolt hole 42, thereby forming a seal.

[0051] Continue to refer to Figures 1-5 The engine body also includes a tie bolt 7, the cylinder block 1 has a third bolt hole 71, and the main bearing cap 2 has a fourth bolt hole 72. The tie bolt 7 passes through both the third bolt hole 71 and the fourth bolt hole 72. The extension direction of the tie bolt 7 is perpendicular to the extension direction of the through bolt 3. The first end of the tie bolt 7 extends out of the cylinder block 1 and is threadedly connected to the tie bolt nut 73. The second end of the tie bolt 7 is threadedly connected to the main bearing cap 2, thereby further improving the stability of the connection between the cylinder block 1 and the main bearing cap 2. Optionally, multiple tie bolts 7, third bolt holes 71, and fourth bolt holes 72 are provided, with each set corresponding to the other.

[0052] Continue to refer to Figures 1-5The fourth bolt hole 72 is connected to the second bolt hole 42, thereby reducing the machining difficulty of the main bearing cover 2. The second end of the tie bolt 7 is sealed to the main bearing cover 2. Specifically, the tie bolt 7 is threaded to the main bearing cover 2, which can form a seal to prevent lubricating oil from flowing out of the second bolt hole 42 through the fourth bolt hole 72.

[0053] This embodiment also provides an engine assembly, including the aforementioned engine body, an oil pan, and an oil pump. The oil pan stores lubricating oil, and the oil pump supplies the lubricating oil from the oil pan to the main oil passage, thereby providing lubrication to various parts of the engine. In this engine body, multiple branch oil passages are connected downstream of the main oil passage, some of which connect to gap 31, allowing the lubricating oil in the main oil passage to enter gap 31 through the branch oil passages. High-pressure lubricating oil provides damping to reduce the vibration amplitude of the through bolt 3 relative to the cylinder block 1 and the main bearing cap 2, preventing the through bolt 3 from loosening. At the same time, since no additional buffer structure is required, the overall structure is simple.

[0054] This embodiment also provides a vehicle including the above-mentioned engine assembly. The engine body in the engine assembly can reduce the vibration amplitude of the through bolt 3 relative to the cylinder block 1 and the main bearing cap 2, and prevent the through bolt 3 from loosening. At the same time, since no additional buffer structure is required, the overall structure is simple.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An engine body, including a cylinder block (1), a main bearing cap (2) and a through bolt (3), and having a main oil passage, wherein the cylinder block (1) has a first bolt hole (41), the main bearing cap (2) has a second bolt hole (42), the through bolt (3) passes through both the first bolt hole (41) and the second bolt hole (42), and the main oil passage is used for the passage of lubricating oil; characterized in that There is a gap (31) between the first bolt hole (41) and the through bolt (3), and there is a gap (31) between the second bolt hole (42) and the through bolt (3). The downstream of the main oil passage is connected to a plurality of branch oil passages, some of which are connected to the gap (31).

2. The engine body according to claim 1, characterized in that, Among the multiple branch oil passages, the branch oil passage that communicates with the gap (31) is the first branch oil passage, and the remaining branch oil passages are the second branch oil passages. The cross-sectional area of ​​the second branch oil passage is larger than that of the first branch oil passage.

3. The engine body according to claim 1, characterized in that, Multiple through bolts (3), first bolt holes (41), and second bolt holes (42) are provided, and multiple through bolts (3), multiple first bolt holes (41), and multiple second bolt holes (42) are provided one-to-one. The engine body also includes an oil inlet pipe (6). The inner cavity of the oil inlet pipe (6) is the branch oil passage that communicates with the gap (31). The oil inlet pipe (6) includes a first pipe (61), a pipe joint (62), and multiple second pipes (63). The pipe joint (62) has multiple connecting ends. The first pipe (61) and multiple second pipes (63) are respectively connected to the multiple connecting ends of the pipe joint (62). The inner cavity of the first pipe (61) communicates with the main oil passage, and the inner cavities of the multiple second pipes (63) communicate one-to-one with the multiple gaps (31).

4. The engine body according to claim 1, characterized in that, One end of the through bolt (3) extends out of the cylinder body (1) and is threadedly connected to the first nut (34), while the other end of the through bolt (3) extends out of the main bearing cap (2) and is threadedly connected to the second nut (35).

5. The engine body according to claim 4, characterized in that, A first sealing structure is provided between the outer wall of the through bolt (3) and the hole wall of the first bolt hole (41), and a second sealing structure is provided between the outer wall of the through bolt (3) and the hole wall of the second bolt hole (42).

6. The engine body according to claim 5, characterized in that, Both the first sealing structure and the second sealing structure include one or more sealing rings (32).

7. The engine body according to any one of claims 1-6, characterized in that, It also includes a tie bolt (7), the cylinder body (1) also has a third bolt hole (71), the main bearing cap (2) also has a fourth bolt hole (72), the tie bolt (7) passes through both the third bolt hole (71) and the fourth bolt hole (72), the extension direction of the tie bolt (7) is perpendicular to the extension direction of the through bolt (3), the first end of the tie bolt (7) extends out of the cylinder body (1) and is threadedly connected to the tie bolt nut (73), and the second end of the tie bolt (7) is threadedly connected to the main bearing cap (2).

8. The engine body according to claim 7, characterized in that, The fourth bolt hole (72) is connected to the second bolt hole (42), and the second end of the tie bolt (7) is sealed to the main bearing cap (2).

9. An engine assembly, characterized in that, The engine body includes the engine body as described in any one of claims 1-8, and further includes an oil pan and an oil pump, wherein the oil pan is used to store lubricating oil and the oil pump is used to supply the lubricating oil in the oil pan to the main oil passage.

10. A vehicle, characterized in that, Includes the engine assembly as described in claim 9.

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