Engine cylinder block, engine and vehicle

Abstract

The engine cylinder body comprises an upper cylinder body and a lower cylinder body which are connected, the lower cylinder body comprises a lower framework and a main bearing seat, the lower framework is provided with a first installation face and a lower cavity for containing part of a crankshaft, the first installation face abuts against the upper cylinder body, a plurality of first supporting pieces are arranged on the inner wall face of the lower cavity, and a plurality of second supporting pieces are arranged on the inner wall face of the lower cavity. The main bearing seats are embedded in a lower cavity of the lower framework, the main bearing seats are arranged at intervals in the first direction, the first supporting pieces are arranged on the two opposite side faces of each main bearing seat in the first direction in an attached mode and extend in the circumferential direction of the lower cavity, and the first direction is consistent with the axial direction of the lower cavity. The engine cylinder body provided by the utility model is high in structural strength, when an engine works, the main bearing seat is not easy to shake relative to the lower framework and collide with a crankshaft to generate knocking noise, and the riding experience of passengers is good.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to an engine cylinder, an engine and a vehicle. Background Art

[0002] The engine block is the main structure of the engine and is the supporting frame for installing the piston, crankshaft and other parts and accessories. The engine block includes a bisected cylinder block, that is, it includes an upper cylinder block and a lower cylinder block. The mounting surfaces of the upper cylinder block and the lower cylinder block are flush with the crankshaft axis.

[0003] The upper cylinder block or the lower cylinder block in the engine cylinder block supports the crankshaft through the crankshaft support and the main bearing seat respectively. However, in the related art, since the main bearing seat on the lower cylinder block is embedded in the lower frame of the lower cylinder block, the connection strength between the main bearing seat and the lower frame is poor. Under conditions with low background noise, such as the vehicle idling to generate electricity, the engine driving the vehicle at a low speed, etc., the main bearing seat is easy to shake relative to the lower frame under the pressure of the crankshaft, thereby causing the main bearing seat to collide with the crankshaft. Passengers in the car are easy to perceive the more obvious low-frequency knocking noise of the engine when the engine is working, and the passengers have a poor riding experience. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the utility model proposes an engine cylinder block with high structural strength. When the engine is working, the main bearing seat is not easy to collide with the crankshaft and produce knocking noise due to shaking relative to the lower frame, and the passengers have a good riding experience.

[0006] An embodiment of the utility model further provides an engine.

[0007] An embodiment of the present utility model further provides a vehicle.

[0008] The engine cylinder of the utility model embodiment comprises an upper cylinder block and a lower cylinder block connected to each other, the lower cylinder block comprises a lower frame and a main bearing seat, the lower frame is provided with a first mounting surface and a lower chamber for accommodating part of the crankshaft, the first mounting surface abuts against the upper cylinder block, and the inner wall surface of the lower chamber is provided with a plurality of first support members; the main bearing seat is embedded in the lower chamber of the lower frame, there are a plurality of main bearing seats and they are arranged at intervals along the first direction, the first support members are fitted on the two opposite sides of each main bearing seat along the first direction and extend along the circumference of the lower chamber, and the first direction is consistent with the axial direction of the lower chamber. .

[0009] According to the engine cylinder of the embodiment of the utility model, when the main bearing seat is embedded in the lower chamber of the lower frame, the two opposite side surfaces of the main bearing seat along the first direction are both connected to a first support member, that is, the two first support members connect the lower frame of the lower cylinder and the main bearing seat, thereby improving the connection strength between the lower frame and the main bearing seat, and improving the rigidity of the main bearing seat. With the support of the two first support members, the main bearing seat is less likely to deform and shake relative to the lower frame when impacted by the crankshaft, thereby effectively avoiding the main bearing seat from colliding with the crankshaft due to rebound to generate low-frequency knocking noise, and the passengers have a good riding experience.

[0010] In some embodiments, the upper cylinder body includes an upper frame and a crankshaft support, the upper frame is provided with an upper chamber for accommodating part of the crankshaft, and the inner wall surface of the upper chamber is provided with a plurality of second support members; the crankshaft support member is arranged on the inner wall surface of the upper chamber, there are a plurality of crankshaft supports and they are arranged at intervals along the first direction, and the second support members are fittedly arranged on two opposite side surfaces of each crankshaft support member along the first direction and extend along the circumference of the upper chamber.

[0011] In some embodiments, both opposite end surfaces of the first support member along the circumference of the lower chamber are connected to and coplanar with the first mounting surface;

[0012] And / or, the upper skeleton is provided with a second mounting surface which is in close contact with the first mounting surface, the upper skeleton is provided with a piston hole, the second support member includes a first support segment and a second support segment which are arranged on both sides of the piston hole along the circumference of the upper chamber, and the end surface of each of the first support segment and the second support segment away from the piston hole is connected to and coplanar with the second mounting surface.

[0013] In some embodiments, both opposite end surfaces of the first support member along the circumference of the lower chamber are connected to and coplanar with the first mounting surface, and the cross-sectional area of ​​the first support member perpendicular to the circumference of the lower chamber gradually decreases or decreases in a stepwise manner from the end of the first support member toward the middle.

[0014] In some embodiments, the first support members are arranged in pairs, and the number of pairs of the first support members is equal to the number of the main bearing seats;

[0015] And / or, the second support members are arranged in pairs, and the number of pairs of the second support members is equal to the number of the crankshaft support members.

[0016] In some embodiments, the dimension of the first support member in the radial direction of the crankshaft is greater than or equal to 6 mm, and the dimension of the first support member in the first direction is greater than or equal to 4 mm;

[0017] And / or, a dimension of the second support member in the radial direction of the crankshaft is greater than or equal to 6 mm, and a dimension of the second support member in the first direction is greater than or equal to 4 mm.

[0018] In some embodiments, the inner wall surface of the lower chamber is further provided with a plurality of pairs of third support members arranged at intervals along the first direction, the number of pairs of the third support members is equal to the number of the main bearing seats and corresponds one to one, each pair of the third support members is arranged at intervals along the second direction, the second direction, the first direction and the depth direction of the lower chamber are perpendicular to each other, at least one of the third support members is provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel passes through the third support member and the lower frame along the depth direction of the lower chamber, and the main bearing seat is embedded between the corresponding pair of the third support members;

[0019] The inner wall surface of the upper chamber is also provided with a plurality of pairs of fourth support members arranged at intervals along the first direction, the number of pairs of the fourth support members is equal to the number of the crankshaft support members and corresponds one to one, each pair of the fourth support members is arranged at intervals along the second direction, the second direction, the first direction and the depth direction of the upper chamber are perpendicular to each other, at least one of the fourth support members is provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel passes through the fourth support member and the upper frame along the depth direction of the upper chamber, and the crankshaft support member is located between the corresponding pair of the fourth support members.

[0020] In some embodiments, the dimension of the third support member in the second direction is greater than or equal to 3 mm and less than or equal to 6 mm, and the dimension of the third support member in the first direction is greater than or equal to 4 mm;

[0021] And / or, a dimension of the fourth support member in the second direction is greater than or equal to 3 mm and less than or equal to 6 mm, and a dimension of the fourth support member in the first direction is greater than or equal to 4 mm.

[0022] In some embodiments, the dimension of any position of the third support member in the first direction gradually decreases or decreases in a stepwise manner toward the direction close to the main bearing seat;

[0023] And / or, a dimension of any position of the fourth support member in the first direction decreases gradually or in a stepwise manner toward a direction approaching the crankshaft support member.

[0024] In some embodiments, two opposite sides of the main bearing seat along the second direction are provided with protrusions, and the side of the third support member facing the main bearing seat is provided with a groove, the width direction of the groove is consistent with the depth direction of the lower chamber, and the protrusion is fitted in the groove;

[0025] And / or, a side surface of the main bearing seat opposite to the first direction is provided with a weight-reducing hole and / or a weight-reducing groove.

[0026] The engine according to the embodiment of the present utility model comprises the engine cylinder block as described in any of the above embodiments.

[0027] The technical advantages of the engine according to the embodiment of the utility model are the same as the technical advantages of the engine cylinder block of the above-mentioned embodiment, which will not be repeated here.

[0028] A vehicle according to an embodiment of the present invention includes the engine as described in the above embodiment.

[0029] The technical advantages of the vehicle according to the embodiment of the utility model are the same as the technical advantages of the engine in the above-mentioned embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an exploded view of an engine cylinder block according to an embodiment of the utility model.

[0031] Figure 2 It is a schematic diagram of a lower cylinder block in an engine cylinder block according to an embodiment of the utility model.

[0032] Figure 3 yes Figure 2 Exploded diagram.

[0033] Figure 4 It is a schematic diagram of a crankshaft support in an engine cylinder block according to an embodiment of the utility model.

[0034] Figure 5 It is a schematic diagram of an upper cylinder block in an engine cylinder block according to an embodiment of the utility model.

[0035] Reference numerals:

[0036] 1. Lower cylinder body; 11. Lower frame; 111. Lower chamber; 112. First mounting surface; 12. Main bearing seat; 121. Weight reduction hole; 122. Weight reduction groove; 123. Protrusion; 13. First support member; 14. Third support member; 2. Upper cylinder body; 21. Upper frame; 211. Upper chamber; 212. Second mounting surface; 213. Piston hole; 22. Crankshaft support member; 23. Second support member; 231. First support section; 232. Second support section; 24. Fourth support member. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0038] Combine the following Figure 1-Figure 5 An engine block according to an embodiment of the present invention is described.

[0039] The engine cylinder block of the utility model embodiment includes an upper cylinder block 2 and a lower cylinder block 1 connected to each other, and the lower cylinder block 1 includes a lower frame 11 and a main bearing seat 12. The lower frame 11 is provided with a first mounting surface 112 and a lower chamber 111 for accommodating part of the crankshaft. The first mounting surface 112 abuts against the upper cylinder block 2, and the inner wall surface of the lower chamber 111 is provided with a plurality of first support members 13, that is, the first support members 13 are arc-shaped support members. The main bearing seat 12 is embedded in the lower chamber 111 of the lower frame 11. There are a plurality of main bearing seats 12 and they are arranged at intervals along the first direction. The first support members 13 are fitted on the two opposite side surfaces of each main bearing seat 12 along the first direction and extend along the circumference of the lower chamber 111. The first direction is consistent with the axial direction of the lower chamber 111.

[0040] According to the engine cylinder of the embodiment of the utility model, when the main bearing seat 12 is embedded in the lower chamber 111 of the lower frame 11, the two opposite side surfaces of the main bearing seat 12 along the first direction are both connected to a first support member 13, that is, the two first support members 13 connect the lower frame 11 of the lower cylinder 1 and the main bearing seat 12, thereby improving the connection strength between the lower frame 11 and the main bearing seat 12, and improving the rigidity of the main bearing seat 12. With the support of the two first support members 13, the main bearing seat 12 is less likely to deform and shake relative to the lower frame 11 when impacted by the crankshaft, thereby effectively avoiding the main bearing seat 12 from colliding with the crankshaft due to rebound to generate low-frequency knocking noise, and providing passengers with a good riding experience.

[0041] It should be noted that a first mounting hole is provided on the first mounting surface 112, a second mounting hole is provided on the main bearing seat 12, a third mounting hole and a fourth mounting hole are provided on the upper frame 21 and the crankshaft support 22 of the upper cylinder block 2, respectively, and a first threaded member passing through the first mounting hole and the third mounting hole, and a second threaded member passing through the second mounting hole and the fourth mounting hole jointly realize the connection between the upper cylinder block 2 and the lower cylinder block 1. In addition, the engine cylinder block of this embodiment is a bisected cylinder block, the first mounting surface 112 of the lower frame 11 is flush with the axis of the crankshaft, and the first direction is consistent with the axial direction of the crankshaft in the engine.

[0042] In some embodiments, Figure 5 As shown, the upper cylinder block 2 includes an upper frame 21 and a crankshaft support 22. The upper frame 21 is provided with an upper chamber 211 for accommodating part of the crankshaft, and the inner wall surface of the upper chamber 211 is provided with a plurality of second support members 23. The crankshaft support members 22 are arranged on the inner wall surface of the upper chamber 211. There are a plurality of crankshaft support members 22 and they are arranged at intervals along the first direction. The second support members 23 are fitted on two opposite side surfaces of each crankshaft support member 22 along the first direction and extend along the circumference of the upper chamber 211.

[0043] The two opposite sides of the crankshaft support 22 along the first direction are both connected to a second support 23, that is, the two second support members 23 connect the upper frame 21 of the upper cylinder block 2 and the crankshaft support 22, thereby improving the connection strength between the upper frame 21 and the crankshaft support 22, and improving the rigidity of the crankshaft support 22. With the support of the two second support members 23, the crankshaft support 22 is less likely to deform and shake relative to the upper frame 21 when impacted by the crankshaft, thereby effectively preventing the crankshaft support 22 from colliding with the crankshaft due to rebound to generate low-frequency knocking noise, and providing passengers with a good riding experience.

[0044] In some embodiments, Figure 2 As shown, both opposite end surfaces of the first support member 13 along the circumferential direction of the lower chamber 111 are connected and coplanar with the first mounting surface 112. That is, the first support member 13 extends to the first mounting surface 112 of the lower frame 11. At this time, the first support member 13 also strengthens the strength of the wall of the lower frame 11 where the first mounting surface 112 is located, thereby effectively ensuring the rigidity of the lower frame 11.

[0045] and / or, if Figure 5 As shown, the upper frame 21 is provided with a second mounting surface 212 that is in contact with the first mounting surface 112, and the upper frame 21 is provided with a piston hole 213. The second support member 23 includes a first support segment 231 and a second support segment 232 that are arranged on both sides of the piston hole 213 along the circumference of the upper chamber 211, and the end surface of each of the first support segment 231 and the second support segment 232 away from the piston hole 213 is connected to and coplanar with the second mounting surface 212. That is, the first support segment 231 and the second support segment 232 of the second support member 23 are both extended to the second mounting surface 212 of the upper frame 21. At this time, the first support segment 231 and the second support segment 232 realize the reinforcement of the strength of the wall where the second mounting surface 212 of the upper frame 21 is located, thereby effectively ensuring the rigidity of the upper frame 21.

[0046] For example, the two opposite end surfaces of the first support member 13 along the circumferential direction of the lower chamber 111 are connected to and coplanar with the first mounting surface 112, and the end surface of each of the first support segment 231 and the second support segment 232 away from the piston hole 213 is connected to and coplanar with the second mounting surface 212, so that when the lower skeleton 11 and the upper skeleton 21 are connected, the end surface of the first support member 13 is also in contact with the end surface of each of the first support segment 231 and the second support segment 232, thereby effectively increasing the contact area between the upper cylinder block 2 and the lower cylinder block 1, thereby effectively increasing the connection strength between the upper cylinder block 2 and the lower cylinder block 1, and the overall rigidity of the engine cylinder block is higher, and it is less likely to cause low-frequency vibration and noise when impacted by the crankshaft.

[0047] In some embodiments, the two opposite end surfaces of the first support member 13 along the circumference of the lower chamber 111 are connected to and coplanar with the first mounting surface 112, and the cross-sectional area of ​​the first support member 13 perpendicular to the circumference of the lower chamber 111 gradually decreases or decreases in steps from the end of the first support member 13 to the middle.

[0048] At this time, when the first support member 13 is integrally cast with the lower frame 11, the molding difficulty of the first support member 13 is lower. At the same time, the first support member 13 can strengthen the connection strength between the lower frame 11 and the main bearing seat 12, while also effectively reducing the total weight of the first support member 13, thereby reducing the manufacturing cost of the lower cylinder body 1.

[0049] In some embodiments, Figure 2 and Figure 5 As shown, the first support members 13 are arranged in pairs, and the number of pairs of the first support members 13 is equal to the number of the main bearing seats 12. And / or, the second support members 23 are arranged in pairs, and the number of pairs of the second support members 23 is equal to the number of the crankshaft support members 22.

[0050] That is, different main bearing seats 12 correspond to different two first support members 13, and there are two first support members 13 between two adjacent main bearing seats 12. At this time, on the basis of ensuring that the first support member 13 has a good supporting effect on the main bearing seat 12, the two first support members 13 located between two adjacent main bearing seats 12 can be arranged at intervals along the first direction. Compared with the above-mentioned design in which the two first support members 13 are connected to form an integral body, the total weight of the first support member 13 in this embodiment is lower, and the manufacturing cost of the lower cylinder body 1 is lower. Similarly, the paired arrangement of the second support members 23 also reduces the total weight of the second support members 23, thereby effectively reducing the manufacturing cost of the upper cylinder body 2.

[0051] Specifically, the first support members 13 are arranged in pairs, and the number of pairs of the first support members 13 is equal to the number of the main bearing seats 12. The second support members 23 are arranged in pairs, and the number of pairs of the second support members 23 is equal to the number of the crankshaft support members 22. A plurality of main bearing seats 12 are arranged at equal intervals along the first direction, and a plurality of pairs of first support members 13 are arranged at equal intervals along the first direction. A plurality of crankshaft support members 22 are arranged at equal intervals along the first direction, and a plurality of pairs of second support members 23 are arranged at equal intervals along the first direction.

[0052] In some embodiments, the radial dimension of the first support member 13 in the crankshaft is greater than or equal to 6 mm, and the dimension of the first support member 13 in the first direction is greater than or equal to 4 mm. And / or, the radial dimension of the second support member 23 in the crankshaft is greater than or equal to 6 mm, and the dimension of the second support member 23 in the first direction is greater than or equal to 4 mm.

[0053] By setting the radial dimension of the first support member 13 in the crankshaft to be greater than or equal to 6 mm, on the basis of ensuring that the first support member 13 will not interfere with the crankshaft, the contact area between the first support member 13 and the main bearing seat 12 is larger, the connection strength between the first support member 13 and the main bearing seat 12 is higher, and the support strength of the first support member 13 to the main bearing seat 12 is higher. By setting the dimension of the first support member 13 in the first direction to be greater than or equal to 4 mm, the contact area between the first support member 13 and the inner wall surface of the lower chamber 111 is larger, the structural strength and rigidity of the first support member 13 itself are higher, and the connection strength between the main bearing seat 12 and the lower frame 11 is further enhanced. Similarly, the above-mentioned size design of the second support member 23 also effectively improves the connection strength between each of the upper frame 21 and the crankshaft support member 22 and the second support member 23.

[0054] Specifically, the minimum size of the first support member 13 and the second support member 23 in the radial direction of the crankshaft can be 6 mm, 8 mm, 10 mm, etc., and the minimum size of the first support member 13 and the second support member 23 in the first direction can be 4 mm, 6 mm, 8 mm, etc.

[0055] In some embodiments, Figure 2 and Figure 5 As shown, the inner wall surface of the lower chamber 111 is also provided with a plurality of pairs of third support members 14 arranged at intervals along the first direction, the number of pairs of third support members 14 is equal to the number of main bearing seats 12 and corresponds one to one, each pair of third support members 14 is arranged at intervals along the second direction, the second direction, the first direction and the depth direction of the lower chamber 111 are perpendicular to each other, at least one third support member 14 is provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel passes through the third support member 14 and the lower frame 11 along the depth direction of the lower chamber 111, and the main bearing seat 12 is embedded between the corresponding pair of third support members 14.

[0056] The inner wall surface of the upper chamber 211 is also provided with a plurality of pairs of fourth support members 24 arranged at intervals along the first direction, the number of pairs of fourth support members 24 is equal to the number of crankshaft support members 22 and corresponds one to one, each pair of fourth support members 24 is arranged at intervals along the second direction, the second direction, the first direction and the depth direction of the upper chamber 211 are perpendicular to each other, at least one fourth support member 24 is provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel passes through the fourth support member 24 and the upper frame 21 along the depth direction of the upper chamber 211, and the crankshaft support member 22 is located between the corresponding pair of fourth support members 24.

[0057] The two third support members 14 realize common support for the main bearing seat 12 in the second direction, and in combination with the two first support members 13, further improve the connection strength between the main bearing seat 12 and the lower frame 11, and the support stiffness of the main bearing seat 12 is higher. The two fourth support members 24 realize common support for the crankshaft support member 22 in the second direction, and in combination with the two second support members 23, further improve the connection strength between the crankshaft support member 22 and the upper frame 21, and the support stiffness of the crankshaft support member 22 is higher. As a result, when the engine is working and the crankshaft impacts the main bearing seat 12, the low-frequency knocking vibration and noise emitted by the engine cylinder are lower, and the passengers have a better riding experience.

[0058] Specifically, the third support member 14 fills the gap between the inner wall surface of the lower chamber 111 and the main bearing seat 12 in the second direction, and the two opposite side surfaces of each third support member 14 along the first direction are fitted and connected to a first support member 13. The fourth support member 24 fills the gap between the inner wall surface of the upper chamber 211 and the crankshaft support member 22 in the second direction, and the two opposite side surfaces of each fourth support member 24 along the first direction are fitted and connected to a second support member 23.

[0059] In some embodiments, the dimension of the third support member 14 in the second direction is greater than or equal to 3 mm and less than or equal to 6 mm, and the dimension of the third support member 14 in the first direction is greater than or equal to 4 mm. And / or, the dimension of the fourth support member 24 in the second direction is greater than or equal to 3 mm and less than or equal to 6 mm, and the dimension of the fourth support member 24 in the first direction is greater than or equal to 4 mm.

[0060] Under the above dimensions, the reliable connection between each of the first support member 13 and the main bearing seat 12 and the third support member 14 is effectively guaranteed, the third support member 14 has a better supporting effect on the main bearing seat 12, and the supporting rigidity of the main bearing seat 12 is higher. The reliable connection between each of the second support member 23 and the crankshaft support member 22 and the fourth support member 24 is also effectively guaranteed, the fourth support member 24 has a better supporting effect on the crankshaft support member 22, and the supporting rigidity of the crankshaft support member 22 is higher.

[0061] Specifically, the minimum dimensions of the third support member 14 and the fourth support member 24 in the second direction may be 3 mm, 4 mm, 5 mm, and 6 mm, and the minimum dimensions of the third support member 14 and the fourth support member 24 in the first direction may be 4 mm, 6 mm, and 8 mm.

[0062] It should be noted that the upper end surface of the third support member 14 is adjacent to the first mounting surface 112 of the lower frame 11 or is coplanar with the first mounting surface 112 , and the lower end surface of the fourth support member 24 is adjacent to the second mounting surface 212 of the upper frame 21 or is coplanar with the second mounting surface 212 .

[0063] In some embodiments, Figure 2 and Figure 5 As shown, the dimension of any position of the third support member 14 in the first direction gradually decreases or decreases in a stepwise manner toward the main bearing seat 12. And / or, the dimension of any position of the fourth support member 24 in the first direction gradually decreases or decreases in a stepwise manner toward the crankshaft support member 22.

[0064] That is, the thickness of the third support member 14 near the inner wall of the lower frame 11 is large, and the thickness of the part near the main bearing seat 12 is small. The thickness of the fourth support member 24 near the inner wall of the upper frame 21 is large, and the thickness of the part near the crankshaft support member 22 is small. This ensures the connection strength between the third support member 14 and the lower frame 11, and the connection strength between the fourth support member 24 and the upper frame 21, while effectively avoiding the third support member 14 and the fourth support member 24 from excessively occupying the space of the lower chamber 111 and the upper chamber 211 and interfering with the crankshaft, thereby ensuring stable and reliable operation of the crankshaft.

[0065] Specifically, on a projection plane perpendicular to the depth direction of the lower chamber 111 , the projection outer contours of the third support member 14 and the fourth support member 24 are both trapezoidal.

[0066] Alternatively, the dimensions of the third support member 14 and the fourth support member 24 at any position in the first direction may be equal, that is, on the projection plane perpendicular to the depth direction of the lower chamber 111, the projected outer contours of the third support member 14 and the fourth support member 24 are both rectangular.

[0067] In some embodiments, Figure 4 As shown, two opposite side surfaces of the main bearing seat 12 along the second direction are provided with protrusions 123, and the side surface of the third support member 14 facing the main bearing seat 12 is provided with a groove, the width direction of the groove is consistent with the depth direction of the lower chamber 111, and the protrusion 123 fits in the groove.

[0068] Therefore, when the main bearing seat 12 is embedded between the two third support members 14 , the cooperation between the protrusion 123 and the groove effectively improves the connection strength between the main bearing seat 12 and the lower frame 11 .

[0069] Specifically, the depth of the groove is between 1 mm and 2 mm, which ensures the connection strength between the main bearing seat 12 and the lower frame 11 while effectively avoiding the difficulty of installing the main bearing seat 12 in the lower chamber 111 due to the groove being too deep.

[0070] The side surface of the main bearing seat 12 opposite to the first direction is provided with a weight-reducing hole 121 and / or a weight-reducing groove 122. Thus, while ensuring the supporting rigidity of the main bearing seat 12, the weight of the main bearing seat 12 is further reduced, and the manufacturing cost of the main bearing seat 12 is lower.

[0071] Specifically, two weight-reducing holes 121 and one weight-reducing groove 122 are provided on the main bearing seat 12 .

[0072] The engine according to the embodiment of the present utility model comprises an engine cylinder block as described in any of the above embodiments.

[0073] The technical advantages of the engine according to the embodiment of the utility model are the same as the technical advantages of the engine cylinder block of the above-mentioned embodiment, which will not be repeated here.

[0074] A vehicle according to an embodiment of the present invention includes the engine as described in the above embodiment.

[0075] The technical advantages of the vehicle according to the embodiment of the utility model are the same as the technical advantages of the engine in the above-mentioned embodiment, which will not be repeated here.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An engine cylinder block, comprising an upper cylinder block and a lower cylinder block connected to each other, characterized in that: The lower cylinder comprises: A lower frame, the lower frame is provided with a first mounting surface and a lower chamber for accommodating a portion of the crankshaft, the first mounting surface is in contact with the upper cylinder body, and a plurality of first support members are provided on an inner wall surface of the lower chamber; and A main bearing seat, wherein the main bearing seat is embedded in the lower chamber of the lower frame, and there are multiple main bearing seats arranged at intervals along a first direction, and the first support member is fittedly arranged on two opposite side surfaces of each main bearing seat along the first direction and extends along the circumference of the lower chamber, and the first direction is consistent with the axial direction of the lower chamber.

2. The engine block according to claim 1, characterized in that: The upper cylinder body comprises: An upper frame, wherein the upper frame is provided with an upper chamber for accommodating a portion of the crankshaft, and a plurality of second support members are provided on an inner wall surface of the upper chamber; and A crankshaft support member, wherein the crankshaft support member is arranged on the inner wall surface of the upper chamber, there are multiple crankshaft supports and they are arranged at intervals along the first direction, and the second support member is fittedly arranged on two opposite side surfaces of each crankshaft support member along the first direction and extends along the circumference of the upper chamber.

3. The engine block according to claim 2, characterized in that: Both opposite end surfaces of the first support member along the circumferential direction of the lower chamber are connected to and coplanar with the first mounting surface; And / or, the upper skeleton is provided with a second mounting surface which is in close contact with the first mounting surface, the upper skeleton is provided with a piston hole, the second support member includes a first support segment and a second support segment which are arranged on both sides of the piston hole along the circumference of the upper chamber, and the end surface of each of the first support segment and the second support segment away from the piston hole is connected to and coplanar with the second mounting surface.

4. The engine block according to claim 1, characterized in that: The two opposite end surfaces of the first support member along the circumference of the lower chamber are both connected to and coplanar with the first mounting surface, and the cross-sectional area of ​​the first support member perpendicular to the circumference of the lower chamber gradually decreases or decreases in steps from the end of the first support member to the middle.

5. The engine block according to claim 2, characterized in that: The first support members are arranged in pairs, and the number of pairs of the first support members is equal to the number of the main bearing seats; And / or, the second support members are arranged in pairs, and the number of pairs of the second support members is equal to the number of the crankshaft support members.

6. The engine block according to claim 2, characterized in that: The dimension of the first support member in the radial direction of the crankshaft is greater than or equal to 6 mm, and the dimension of the first support member in the first direction is greater than or equal to 4 mm; And / or, a dimension of the second support member in the radial direction of the crankshaft is greater than or equal to 6 mm, and a dimension of the second support member in the first direction is greater than or equal to 4 mm.

7. The engine block according to claim 2, characterized in that: The inner wall surface of the lower chamber is further provided with a plurality of pairs of third support members arranged at intervals along the first direction, the number of pairs of the third support members is equal to the number of the main bearing seats and corresponds one to one, each pair of the third support members is arranged at intervals along the second direction, the second direction, the first direction and the depth direction of the lower chamber are perpendicular to each other, at least one of the third support members is provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel passes through the third support member and the lower frame along the depth direction of the lower chamber, and the main bearing seat is embedded between the corresponding pair of the third support members; The inner wall surface of the upper chamber is also provided with a plurality of pairs of fourth support members arranged at intervals along the first direction, the number of pairs of the fourth support members is equal to the number of the crankshaft support members and corresponds one to one, each pair of the fourth support members is arranged at intervals along the second direction, the second direction, the first direction and the depth direction of the upper chamber are perpendicular to each other, at least one of the fourth support members is provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel passes through the fourth support member and the upper frame along the depth direction of the upper chamber, and the crankshaft support member is located between the corresponding pair of the fourth support members.

8. The engine block according to claim 7, characterized in that: The dimension of the third support member in the second direction is greater than or equal to 3 mm and less than or equal to 6 mm, and the dimension of the third support member in the first direction is greater than or equal to 4 mm; And / or, a dimension of the fourth support member in the second direction is greater than or equal to 3 mm and less than or equal to 6 mm, and a dimension of the fourth support member in the first direction is greater than or equal to 4 mm.

9. The engine block according to claim 7, characterized in that: The dimension of any position of the third support member in the first direction gradually decreases or decreases in a stepwise manner toward the direction close to the main bearing seat; And / or, a dimension of any position of the fourth support member in the first direction decreases gradually or in a stepwise manner toward a direction approaching the crankshaft support member.

10. The engine block according to claim 7, characterized in that: The two opposite sides of the main bearing seat along the second direction are provided with protrusions, and the side of the third support member facing the main bearing seat is provided with a groove, the width direction of the groove is consistent with the depth direction of the lower chamber, and the protrusion is fitted in the groove; And / or, a side surface of the main bearing seat opposite to the first direction is provided with a weight-reducing hole and / or a weight-reducing groove.

11. An engine, characterized in that: Comprising an engine cylinder block as claimed in any one of claims 1 to 10.

12. A vehicle, characterized in that: Comprising the engine of claim 11.

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