Engine main bearing cap

Abstract

The utility model relates to the technical field of main bearing cap, specifically to an engine main bearing cap, including the cover body, the cover body includes the connecting portion, both sides of connecting portion all are provided with the column portion, is set up the screw hole that passes up and down on the column portion, the upper end surface of column portion is set up the slot that communicates with the screw hole, the utility model discloses the slot of communication on the screw hole upper end of cover body, installs the bolt in the screw hole, the setting of slot plays the role of dispersing stress, avoids the stress concentration in the point or certain area of bolt, under the locking force of bolt, reduces stress through the slot, reduces the probability of bolt fatigue damage under the long -term effect, reduces the degree of cover body deformation or damage.

Description

Technical Field

[0001] This utility model relates to the field of main bearing cover technology, and in particular to an engine main bearing cover. Background Technology

[0002] The engine is the core power component of a car, primarily used to provide power for the vehicle's movement. During operation, the combustion and expansion of fuel in the cylinders causes the piston to reciprocate within the cylinder. The piston, via the connecting rod, drives the crankshaft to rotate, propelling the car forward. The crankshaft is fixed to the engine block by a main bearing cap. Because the crankshaft bore in a car engine requires very high precision (diameter grade 6, cylindricity around 6μm), to ensure manufacturing accuracy, the main bearing cap is first screwed onto the engine block, and the two are then precision-machined together to fit the crankshaft bore. After the crankshaft bore is precision-machined, the main bearing cap is removed, the crankshaft is installed in its designated position on the cylinder block, and then the main bearing cap is reinstalled in its previous position. Therefore, the design of the main bearing cap is extremely important.

[0003] Traditional bearing caps are prone to deformation or damage under high load or high speed conditions, and their structural strength is insufficient. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide an engine main bearing cover to solve the problem of easy damage.

[0005] To achieve the above objectives, this utility model provides an engine main bearing cover, including a cover body, the cover body including a connecting part, and a column part provided on both sides of the connecting part. The column part is provided with a through screw hole, and the upper end face of the column part is provided with a slot communicating with the screw hole.

[0006] Optionally, the upper outer side of the column is provided with multiple outward protrusions.

[0007] Optionally, the lower end of the column is connected to a support block that is connected to the connecting part, and the screw hole is provided through the support block.

[0008] Optionally, the cross-section of one end of the slot connected to the screw hole is smaller than the cross-section of the other end of the slot.

[0009] Optionally, the lower part of the connecting portion has an arched central opening for a bearing or camshaft to pass through. The upper end face of the connecting portion is provided with a curved surface. The middle height of the curved surface is higher than the height of the upper end face of the column portion, and the height of the end of the curved surface that connects to the column portion is lower than the height of the upper end face of the column portion.

[0010] Optionally, the upper end face of the curved surface is provided with an upward convexity.

[0011] Optionally, the front and rear sides of the connecting part are provided with weight-reducing grooves, the weight-reducing grooves are located between the curved surface and the central opening, and the weight-reducing grooves are provided with recesses.

[0012] Optionally, an arc-shaped reinforcing rib is provided in the weight-reducing groove. The reinforcing rib can be located at the opening of the weight-reducing groove, and the reinforcing rib connects the two column parts.

[0013] The beneficial effects of this utility model are as follows: This utility model provides an engine main bearing cover with a groove at the upper end of the screw hole on the cover body. A bolt is installed in the screw hole. When the main bearing cover is installed on the engine, the bolt on the cover body will bear a large tensile force and pressure during engine operation. The grooved design plays a role in dispersing stress and avoiding stress concentration at a certain point or area of ​​the bolt. Under the bolt tightening force, the grooved design reduces the stress and lowers the probability of bolt fatigue damage under long-term action. The presence of the groove allows the stress to be distributed more evenly on the entire stress surface of the bolt, extending the service life of the bolt, improving the reliability of the main bearing connection, and reducing the degree of deformation or damage to the cover body.

[0014] The slots can serve as positioning marks during installation, facilitating precise bolt installation. When installing the main bearing cap bolts, workers or automated equipment can observe the position of the slots to ensure that the bolts are correctly installed in the designated position, avoiding bolt installation deviations. This positioning helps to ensure the correct fit between the main bearing cap and the engine block, thereby ensuring the accuracy of the main bearing hole and the normal operation of the crankshaft.

[0015] Furthermore, during bolt assembly, grooving provides a better point of leverage for tools, improving assembly convenience. When using specific wrenches or tightening tools, grooving can match the corresponding parts of the tool, making it easier for workers or automated equipment to apply the appropriate torque to tighten the bolts. This design makes assembly operations more convenient and accurate, improves production efficiency, and also allows for better control of bolt tightening torque, ensuring the quality of the main bearing connection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1. Cover; 2. Connecting part; 3. Column; 4. Support block; 5. Center opening; 6. Curved surface; 7. Screw hole; 8. Groove; 9. Outward protrusion; 10. Upward protrusion; 11. Weight reduction groove; 12. Groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 As shown, an engine main bearing cover includes a cover body 1, the cover body 1 includes a connecting part 2, and a column part 3 is provided on both sides of the connecting part 2. The column part 3 has a through screw hole 7, and the upper end face of the column part 3 has a slot 8 communicating with the screw hole 7.

[0022] A slot 8 is connected to the upper end of the screw hole 7 on the cover 1. A bolt is installed in the screw hole 7. The main bearing cover is installed on the engine. During the operation of the engine, the bolt on the cover 1 will bear a large tensile force and pressure. The slot 8 is designed to disperse the stress and avoid stress concentration at a certain point or area of ​​the bolt. Under the tightening force of the bolt, the slot 8 reduces the stress and reduces the probability of bolt fatigue damage under long-term action. The presence of the slot 8 allows the stress to be distributed more evenly on the entire force-bearing surface of the bolt, extending the service life of the bolt, improving the reliability of the main bearing connection, and reducing the degree of deformation or damage to the cover 1.

[0023] The slot 8 can serve as a positioning mark during installation, facilitating precise bolt installation and positioning. When installing the main bearing cap bolts, workers or automated equipment can observe the position of the slot 8 to ensure that the bolts are correctly installed in the designated position, avoiding bolt installation deviation. This positioning helps to ensure the correct fit between the main bearing cap and the engine block, thereby ensuring the accuracy of the main bearing hole and the normal operation of the crankshaft.

[0024] Furthermore, during bolt assembly, the slot 8 provides a better point of leverage for the tool, improving assembly convenience. When using a specific wrench or tightening tool, the slot 8 can cooperate with the corresponding part of the tool, making it easier for workers or automated equipment to apply the appropriate torque to tighten the bolt. This design makes the assembly operation more convenient and accurate, improves production efficiency, and also allows for better control of the bolt tightening torque, ensuring the quality of the engine main bearing connection.

[0025] During the installation of the main bearing cap, sealant or other sealing materials are placed at the opening of the bolt hole 7, and then the bolts are tightened into the bolt hole 7. Sealant or other sealing materials are usually used to prevent oil leakage. The groove 8 is designed to better accommodate these sealing materials, so that they form a more effective sealing barrier after the bolts are tightened, enhancing the sealing performance. The sealing material filled in the groove 8 can fill the tiny gaps between the bolt head and the bearing cap, preventing oil from seeping out from these gaps, ensuring the normal operation of the engine lubrication system, reducing oil consumption and other malfunctions that may be caused by oil leakage.

[0026] The slot 8 is funnel-shaped, and the cross-section of one end of the slot 8 that connects to the screw hole 7 is smaller than the cross-section of the other end of the slot 8, which enhances the sealing performance and facilitates the filling of sealing material.

[0027] The upper outer side of the column 3 is provided with multiple protrusions 9, which reduces the area between the cover 1 and the body and improves the high pressure resistance of the cover 1.

[0028] The lower end of the column 3 is connected to a support block 4 that is connected to the connecting part 2. The screw hole 7 is provided through the support block 4 to support the column 3.

[0029] The connecting part 2, the two support blocks 4 and the two column parts 3 are all made of aluminum alloy.

[0030] The lower part of the connecting part 2 has an arched central opening 5 for a bearing or camshaft to pass through. The upper end face of the connecting part 2 is provided with a curved surface 6. The height of the middle part of the curved surface 6 is higher than the height of the upper end face of the column part 3. The height of the end of the curved surface 6 that connects to the column part 3 is lower than the height of the upper end face of the column part 3, which improves the strength of the cover 1 and makes it easier for the cover 1 to withstand greater pressure.

[0031] The upper end face of the curved surface 6 is provided with an upward protrusion 10, which reduces the area between the cover 1 and the body contact surface, and also improves the high pressure resistance of the cover 1.

[0032] The front and rear sides of the connecting part 2 are provided with weight reduction grooves 11. The weight reduction grooves 11 are located between the curved surface 6 and the middle opening 5. The weight reduction grooves 11 are provided with grooves 12, which reduces the area between the cover 1 and the body and improves the high pressure resistance of the cover 1.

[0033] The weight-reducing groove 11 is provided with an arc-shaped reinforcing rib. The reinforcing rib can be located at the opening and bottom of the weight-reducing groove 11. The reinforcing rib connects the two column parts 3, thereby improving the overall strength of the cover body 1 of the main bearing cover.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0035] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An engine main bearing cover, comprising a cover body, characterized in that, The cover includes a connecting part, and a column part is provided on both sides of the connecting part. The column part has a through screw hole, and the upper end face of the column part has a slot communicating with the screw hole.

2. The engine main bearing cover according to claim 1, characterized in that, The upper outer side of the column has multiple outward protrusions.

3. The engine main bearing cover according to claim 1, characterized in that, The lower end of the column is connected to a support block that is connected to the connecting part, and the screw hole is provided through the support block.

4. The engine main bearing cover according to claim 1, characterized in that, The cross-section of one end of the slot connected to the screw hole is smaller than the cross-section of the other end of the slot.

5. An engine main bearing cover according to claim 1, characterized in that, The lower part of the connecting part has an arched central opening for a bearing or camshaft to pass through. The upper end face of the connecting part has a curved surface. The middle part of the curved surface is higher than the upper end face of the column. The end of the curved surface that connects to the column is lower than the upper end face of the column.

6. An engine main bearing cover according to claim 5, characterized in that, The upper surface of the curved surface is provided with an upward convexity.

7. An engine main bearing cover according to claim 5, characterized in that, The front and rear sides of the connecting part are provided with weight reduction grooves, which are located between the curved surface and the central opening, and the weight reduction grooves are provided with grooves.

8. An engine main bearing cover according to claim 7, characterized in that, The weight-reducing groove is provided with an arc-shaped reinforcing rib, which can be located at the opening of the weight-reducing groove and connects the two column parts.

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