Engine crankshaft bearing cap structure

Abstract

The utility model discloses an engine crankshaft bearing cover structure, and particularly relates to the field of engine crankshaft bearing covers, the engine crankshaft bearing cover structure comprises an engine body, a crankshaft body, a bearing cover body and an oil pan, the crankshaft body is installed in an inner cavity of the engine body, and the inner cavity of the engine body is connected with the bearing cover body in a limiting mode. An oil pan is arranged on the bottom end face of the engine body, and a protection cover is arranged on the bottom end face of the oil pan. Through multi-point fixation, namely, connection between the bearing cover and the cylinder body is fixed through multi-point bolts, stability of an engine during operation is ensured, meanwhile, the structural strength is further improved through the reinforcing ribs, the multiple oil grooves are designed, it is ensured that lubricating oil can be evenly distributed on the surface of the bearing, and meanwhile the lubricating oil is stored; lubricating oil is prevented from leaking through the high-quality sealing ring, meanwhile, external impurities are prevented from entering the bearing cover, different working conditions are further adapted due to the special structure of the sealing ring, the cooling fins are arranged on the bottom end face of the bearing cover body, and the cooling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of engine crankshaft bearing caps, and more specifically, to an engine crankshaft bearing cap structure. Background Art

[0002] The engine crankshaft bearing cap, also known as the main bearing cap, is one of the key components of the engine. Its main function is to fix and support the engine crankshaft and is located at the bottom of the engine. The bearing cap is used in conjunction with the crankshaft to ensure that the crankshaft can rotate easily in the circumferential direction and limit the axial movement of the crankshaft. In addition, the bearing cap is also responsible for bearing the cyclic alternating loads applied when the engine is working, ensuring the efficient operation of the engine, and protecting the crankshaft from the influence of the external environment, such as the intrusion of dust, impurities and foreign matter;

[0003] For example, application number CN202010765861.4 discloses an engine crankcase, which has a simple structure, is easy to manufacture, and can meet the design requirements of engines of different displacements, thereby realizing serialization of engine development and commonality of parts; wherein the engine crankshaft bearing cap not only needs to withstand the cyclic alternating load applied when the engine is working, that is, the supporting force of the crankshaft in the engine when it is rotating, but also needs to have good sealing performance to prevent the engine crankshaft from interfering with each other during operation and affecting the rotation of the engine crankshaft, but also needs to dissipate heat from the engine crankshaft bearing cap to assist in cooling the engine crankshaft;

[0004] Therefore, in view of the above problems, an engine crankshaft bearing cap structure is proposed. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides an engine crankshaft bearing cover structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an engine crankshaft bearing cover structure, comprising an engine body, a crankshaft body, a bearing cover body and an oil pan, wherein the crankshaft body is installed in the inner cavity of the engine body, and the inner cavity of the engine body is limitedly connected with the bearing cover body, the bottom end surface of the engine body is provided with an oil pan, and the bottom end surface of the oil pan is provided with a protective cover;

[0007] The bottom end surface of the bearing cover body is provided with a heat sink, the surface of the arc groove in the bearing cover body is provided with a first fine oil groove, limiting grooves are provided on both sides of the arc groove in the bearing cover body, and the upper end surface of the bearing cover body is longitudinally penetrated with mounting bolt holes, two groups of the limiting grooves are both snap-fitted and connected with two groups of gaskets, and a second fine oil groove is dug on a side of the gasket away from the bearing cover body, the side end surfaces of the bearing cover body are provided with reinforcing ribs, and the contact surface between the bearing cover body and the engine body is provided with a sealing ring.

[0008] Preferably, the heat sink is connected to the bearing cover body by bolts through a fixing plate, four groups of mounting bolt holes are provided, and the four groups of mounting bolt holes are symmetrically mounted on the upper end surface of the bearing cover body.

[0009] Preferably, the sealing ring consists of an outer layer, a middle layer, an inner layer and a reinforcement layer, the middle layer is arranged on the inner side of the outer layer, the inner layer is arranged on the inner side of the middle layer, and the interior of the middle layer is filled with the reinforcement layer.

[0010] Preferably, the outer layer is made of silicon carbide ceramics or hard alloy, the middle layer is made of fluororubber or silicone rubber, the reinforcement layer is specifically made of a fiber-reinforced material, and the inner layer is made of a rigid metal material.

[0011] Preferably, the bearing cover body is made of high-strength aluminum alloy material by precision casting, the heat sink is made of copper alloy material, and the heat sink is provided in several groups and is fan-shaped, and the heat sink is equidistantly arranged on the bottom end surface of the bearing cover body.

[0012] Preferably, reinforcing ribs are installed on all four sides of the inside and outside of the bearing cover body, the limiting grooves and gaskets are both arc-shaped, and the protective cover is limitedly connected to the engine body by detachable bolts.

[0013] Technical effects and advantages of the utility model:

[0014] Compared with the prior art, the engine crankshaft bearing cover structure is fixed at multiple points, that is, the connection between the bearing cover and the cylinder block can be fixed with multiple bolts, ensuring that the engine maintains good stability and reduces vibration when running. At the same time, reinforcing ribs are arranged to further improve the structural strength, and multiple oil grooves are designed to ensure that the lubricating oil can be evenly distributed on the bearing surface and store the lubricating oil at the same time. The lubricating oil is prevented from leaking through a high-quality sealing ring, and the entry of foreign impurities is prevented. Due to the special structure of the sealing ring, it can adapt to thermal expansion and mechanical wear under different working conditions, and a heat sink is arranged on the bottom end surface of the bearing cover body to improve the heat dissipation efficiency.

[0015] Compared with the prior art, the engine crankshaft bearing cover structure is fixed at multiple points during use, and the connection between the bearing cover body and the engine body is fixed by multiple bolts to ensure that the engine can maintain good stability at high speeds when running and reduce vibration. Reinforcement ribs are added to the four sides of the inner and outer sides of the bearing cover body to improve the structural strength and reduce deformation. Second fine oil grooves are dug on the gaskets on both sides of the bearing cover body to ensure that the lubricating oil can be evenly distributed on the bearing surface, reduce friction, and improve efficiency.

[0016] An oil groove is designed on the contact surface between the bearing cover body and the crankshaft bearing to store lubricating oil to ensure sufficient lubrication under any operating conditions. High-quality sealing rings are used on the contact surface between the bearing cover body and the engine body to prevent leakage of lubricating oil and prevent foreign matter from entering. The sealing ring can adapt to thermal expansion and mechanical wear under different working conditions. A heat sink is installed on the bottom end surface of the bearing cover body to increase the surface area, improve heat dissipation efficiency, reduce bearing temperature, and extend service life. In this device, the bearing cover body is made of high-strength and high-wear-resistant materials to withstand the high load and high temperature when the engine is running. At the same time, weight considerations are also required. It is made of high-strength aluminum alloy material precision casting to reduce the overall weight of the engine and improve performance while ensuring structural strength.

[0017] Compared with the prior art, this engine crankshaft bearing cover structure, when in use, has a reinforcing layer in which fiber-reinforced materials are embedded in the middle layer, thereby increasing the strength and stability of the sealing gasket. Under the elastic action of the rubber material of the middle layer, the sealing gasket can automatically adjust in the working state to maintain close contact and reduce leakage. The ceramic or cemented carbide of the outer layer and the metal material of the inner layer provide excellent temperature and pressure resistance. At the same time, the material selection of the outer layer and the middle layer ensures that the sealing gasket can maintain a good sealing effect even in corrosive media.

[0018] Compared with the prior art, in this engine crankshaft bearing cover structure, when in use, the heat sink is limitedly connected to the bearing cover body by bolts through the fixing plate, so that the heat sink can contact the bearing cover body through the fixing plate, thereby increasing the surface area of ​​the bearing cover body, improving the heat dissipation efficiency, reducing the bearing temperature, and extending the service life. The heat sink and the fixing plate are made of the same material to facilitate heat dissipation. At the same time, multiple right grooves, namely the first fine oil groove and the second fine oil groove, are provided to reduce the friction between the bearing cover body and the crankshaft, thereby improving the rotation efficiency, extending the service life, and ensuring sufficient lubrication under any operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front section structure of the engine body of the utility model.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the bearing cover body of the utility model.

[0021] Figure 3 It is a schematic diagram of the explosion structure of the bearing cover body of the utility model.

[0022] Figure 4 It is a schematic diagram of the front section structure of the bearing cover body of the utility model.

[0023] Figure 5 It is a schematic diagram of the side section structure of the bearing cover body of the utility model.

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the sealing ring of the utility model.

[0025] The accompanying drawings are marked as follows: 1. engine body; 2. crankshaft body; 3. bearing cover body; 301. heat sink; 302. first fine oil groove; 303. limit groove; 304. mounting bolt hole; 305. gasket; 306. second fine oil groove; 307. reinforcing rib; 308. sealing ring; 3081. outer layer; 3082. middle layer; 3083. inner layer; 3084. reinforcement layer; 4. oil pan; 5. protective cover; 6. fixing plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] As attached Figures 1 to 3 An engine crankshaft bearing cap structure shown in the figure comprises an engine body 1, a crankshaft body 2, a bearing cap body 3 and an oil pan 4, wherein the crankshaft body 2 is mounted in the inner cavity of the engine body 1, and the inner cavity of the engine body 1 is limitedly connected with the bearing cap body 3, the bottom end surface of the engine body 1 is provided with the oil pan 4, and the bottom end surface of the oil pan 4 is provided with a protective cover 5;

[0029] A heat sink 301 is provided on the bottom end surface of the bearing cover body 3, a first fine oil groove 302 is dug on the surface of the arc groove in the bearing cover body 3, limiting grooves 303 are provided on both sides of the arc groove in the bearing cover body 3, and a mounting bolt hole 304 is longitudinally penetrated through the upper end surface of the bearing cover body 3. Two groups of limiting grooves 303 are both fastened and connected with two groups of gaskets 305, and a second fine oil groove 306 is dug on the side of the gasket 305 away from the bearing cover body 3, the side end surfaces of the bearing cover body 3 are provided with reinforcing ribs 307, and a sealing ring 308 is provided on the contact surface between the bearing cover body 3 and the engine body 1.

[0030] Among them: the connection between the bearing cover body 3 and the engine body 1 is fixed by multi-point bolts to ensure that the engine can maintain good stability at high speed when running and reduce vibration. Reinforcement ribs 307 are added on the four sides of the inner and outer sides of the bearing cover body 3 to improve the structural strength and reduce deformation. The gaskets 305 on both sides of the bearing cover body 3 are dug with second fine oil grooves 306 to ensure that the lubricating oil can be evenly distributed on the bearing surface, reduce friction and improve efficiency. An oil groove is designed on the contact surface between the bearing cover body 3 and the crankshaft bearing to store lubricating oil, ensuring sufficient lubrication under any operating conditions and in the bearing A high-quality sealing ring 308 is used on the contact surface between the cover body 3 and the engine body 1 to prevent leakage of lubricating oil and entry of foreign matter, and the sealing ring 308 can adapt to thermal expansion and mechanical wear under different working conditions. A heat sink 301 is installed on the bottom end surface of the bearing cover body 3 to increase the surface area, improve heat dissipation efficiency, reduce bearing temperature, and extend service life. In this device, the bearing cover body 3 is made of high-strength and high-wear-resistant materials to withstand the high load and high temperature when the engine is running. At the same time, weight considerations are also required. It is made of high-strength aluminum alloy material with precision casting, which reduces the overall weight of the engine and improves performance while ensuring structural strength.

[0031] Example 2

[0032] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working method. Figures 1 to 6 As shown, see the following description for details:

[0033] As a preferred embodiment, the heat sink 301 is connected to the bearing cover body 3 by bolts through the fixing plate 6, four groups of mounting bolt holes 304 are provided, and the four groups of mounting bolt holes 304 are symmetrically installed on the upper end surface of the bearing cover body 3, wherein the connection between the bearing cover body 3 and the engine body 1 is fixed with multi-point bolts to ensure that the engine can maintain good stability at high speed during operation and reduce vibration, wherein reinforcing ribs 307 are added on the four sides inside and outside the bearing cover body 3 to improve the structural strength and reduce deformation.

[0034] As a preferred embodiment, the sealing ring 308 is composed of an outer layer 3081, an intermediate layer 3082, an inner layer 3083 and a reinforcement layer 3084. The intermediate layer 3082 is arranged on the inner side of the outer layer 3081, and the inner layer 3083 is arranged on the inner side of the intermediate layer 3082. The interior of the intermediate layer 3082 is filled with the reinforcement layer 3084.

[0035] As a preferred embodiment, the outer layer 3081 is made of silicon carbide ceramic or cemented carbide, the middle layer 3082 is made of fluororubber or silicone rubber, and the reinforcement layer 3084 is specifically made of a fiber-reinforced material. The inner layer 3083 is made of a rigid metal material. When in use, the reinforcement layer 3084 embeds the fiber-reinforced material in the middle layer 3082 to increase the strength and stability of the sealing ring 308. Under the elastic action of the rubber material of the middle layer 3082, the sealing ring 308 can automatically adjust in the working state, maintain close contact, and reduce leakage. The ceramic or cemented carbide of the outer layer 3081 and the metal material of the inner layer 3083 provide excellent temperature and pressure resistance. At the same time, the material selection of the outer layer 3081 and the middle layer 3082 ensures that the sealing ring 308 can maintain a good sealing effect.

[0036] As a preferred embodiment, the bearing cover body 3 is made of high-strength aluminum alloy material by precision casting, the heat sink 301 is made of copper alloy material, and the heat sink 301 is provided with several groups, and the heat sink 301 is fan-shaped, and the heat sink 301 is equidistantly arranged on the bottom end surface of the bearing cover body 3, and the heat sink 301 is connected to the bearing cover body 3 by bolts through the fixing plate 6, so that the heat sink 301 contacts the bearing cover body 3 through the fixing plate 6, thereby increasing the surface area of ​​the bearing cover body 3, improving the heat dissipation efficiency, reducing the bearing temperature, and extending the service life, and the heat sink 301 and the fixing plate 6 are made of the same material to facilitate heat dissipation.

[0037] As a preferred embodiment, reinforcing ribs 307 are installed on all four sides of the inside and outside of the bearing cover body 3, the limiting grooves 303 and the gaskets 305 are arc-shaped, the protective cover 5 is limitedly connected to the engine body 1 by removable bolts, and multiple right grooves are provided, namely the first fine oil groove 302 and the second fine oil groove 306 dug on the side end face of the gasket 305, so as to reduce the friction between the bearing cover body 3 and the crankshaft, thereby improving the rotation efficiency, extending the service life, and ensuring sufficient lubrication under any operating conditions.

[0038] The working process of the utility model is as follows: when in use, the connection between the bearing cover body 3 and the engine body 1 is fixed with multi-point bolts to ensure the stability of the engine during operation, and reinforcing ribs 307 are added on the four sides of the inner and outer sides of the bearing cover body 3 to improve the structural strength, and the gaskets 305 on both sides of the bearing cover body 3 are dug with second fine oil grooves 306 to reduce friction, and oil grooves are designed on the contact surface between the bearing cover body 3 and the crankshaft bearing, wherein a high-quality sealing ring 308 is used on the contact surface between the bearing cover body 3 and the engine body 1, and the sealing ring 308 can adapt to different working conditions;

[0039] A heat sink 301 is installed on the bottom end surface of the bearing cover body 3, and in this device, the bearing cover body 3 is made of high-strength and high-wear-resistant materials to reduce the overall weight of the engine while ensuring the structural strength, wherein the heat sink 301 is bolted and limitedly connected to the bearing cover body 3 through the fixing plate 6, so that the heat sink 301 can contact the bearing cover body 3 through the fixing plate 6, thereby increasing the surface area of ​​the bearing cover body 3 and improving the heat dissipation efficiency, and the heat sink 301 and the fixing plate 6 are made of the same material, and a first fine oil groove 302 and a second fine oil groove 306 are provided at the same time, so as to reduce the friction between the bearing cover body 3 and the crankshaft and ensure sufficient lubrication under any operating conditions.

[0040] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An engine crankshaft bearing cap structure, comprising an engine body (1), a crankshaft body (2), a bearing cap body (3) and an oil pan (4), characterized in that: The crankshaft body (2) is installed in the inner cavity of the engine body (1), and the inner cavity of the engine body (1) is limitedly connected to a bearing cover body (3), the bottom end surface of the engine body (1) is provided with an oil pan (4), and the bottom end surface of the oil pan (4) is provided with a protective cover (5); The bottom end surface of the bearing cover body (3) is provided with a heat sink (301), the surface of the arc groove in the bearing cover body (3) is provided with a first fine oil groove (302), both sides of the arc groove in the bearing cover body (3) are provided with limit grooves (303), the upper end surface of the bearing cover body (3) is provided with a mounting bolt hole (304) running through it in the longitudinal direction, two groups of limit grooves (303) are both fastened and connected with two groups of gaskets (305), and a second fine oil groove (306) is dug on a side of the gasket (305) away from the bearing cover body (3), the side end surfaces of the bearing cover body (3) are provided with reinforcing ribs (307), and the contact surface between the bearing cover body (3) and the engine body (1) is provided with a sealing ring (308).

2. The engine crankshaft bearing cap structure according to claim 1, characterized in that: The heat sink (301) is connected to the bearing cover body (3) by bolts via a fixing plate (6); four groups of mounting bolt holes (304) are provided, and the four groups of mounting bolt holes (304) are symmetrically mounted on the upper end surface of the bearing cover body (3).

3. The engine crankshaft bearing cap structure according to claim 1, characterized in that: The sealing ring (308) is composed of an outer layer (3081), an intermediate layer (3082), an inner layer (3083) and a reinforcing layer (3084); the intermediate layer (3082) is arranged on the inner side of the outer layer (3081), and the inner layer (3083) is arranged on the inner side of the intermediate layer (3082); the interior of the intermediate layer (3082) is filled with a reinforcing layer (3084).

4. The engine crankshaft bearing cap structure according to claim 3, characterized in that: The outer layer (3081) is made of silicon carbide ceramic or hard alloy, the middle layer (3082) is made of fluororubber or silicone rubber, and the reinforcement layer (3084) is specifically made of a fiber-reinforced material, and the inner layer (3083) is made of a rigid metal material.

5. The engine crankshaft bearing cap structure according to claim 1, characterized in that: The bearing cover body (3) is made of high-strength aluminum alloy material by precision casting, the heat sink (301) is made of copper alloy material, and the heat sink (301) is provided in a plurality of groups, and the heat sink (301) is fan-shaped, and the heat sink (301) is equidistantly arranged on the bottom end surface of the bearing cover body (3).

6. The engine crankshaft bearing cap structure according to claim 1, characterized in that: Reinforcing ribs (307) are installed on the four inner and outer sides of the bearing cover body (3); the limiting groove (303) and the gasket (305) are both arc-shaped; and the protective cover (5) is connected to the engine body (1) in a limiting manner via detachable bolts.

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