A high strength main bearing cap assembly for an internal combustion engine

Abstract

This application discloses a high-strength internal combustion engine main bearing cap assembly, belonging to the field of bearing structure technology. It provides a high-strength internal combustion engine main bearing cap assembly with lower replacement costs and easier disassembly and assembly. The assembly includes a pressure plate and a constraint plate. The main body of the pressure plate is an inner conical ring, with an inner liner ring at the smaller diameter end and a blocking ring on the inner wall of the liner ring. The main body of the constraint plate is an outer conical ring, with its inner wall adapted to fit against the outer surface of the inner conical ring. The larger diameter end of the outer conical ring also has a connecting ring with several through holes. This application designs the bearing cap assembly to consist of two parts: a pressure plate and a constraint plate. The pressure plate directly contacts the internal combustion engine main bearing, bearing the main function of forced damage, while the constraint plate is fixedly connected to the internal combustion engine body, bearing the main constraint function. The two components separate the functions and weight of the bearing cap, making each component easier to disassemble and assemble.

Description

Technical Field

[0001] This application relates to the field of bearing structure technology, and in particular to a high-strength main bearing cap assembly for internal combustion engines. Background Technology

[0002] The main bearing cap of an internal combustion engine is used as a separate component. When it needs to be replaced, the entire bearing cap needs to be replaced. A high-strength bearing cap is required, and the material thickness is also relatively large. It is also relatively heavy, which not only makes the replacement cost high, but also makes the replacement more difficult. Utility Model Content

[0003] The purpose of this application is to provide a high-strength internal combustion engine main bearing cap assembly that is cheaper to replace and easier to disassemble and assemble.

[0004] To achieve the above objectives, this application provides a high-strength main bearing cap assembly for an internal combustion engine: comprising a pressure plate and a constraint plate. The main body of the pressure plate is an inner conical ring, the smaller diameter end of which has an inner liner ring, and the inner wall of the inner liner ring has a blocking ring. The main body of the constraint plate is an outer conical ring, the inner wall of which is adapted to fit against the outer surface of the inner conical ring. The larger diameter end of the outer conical ring also has a connecting ring, which has several through holes suitable for bolts to pass through, thereby fixing the bearing cap assembly to the main body of the internal combustion engine.

[0005] As a preferred embodiment, a fitting ring groove is formed between the inner wall of the connecting ring and the end face of the outer conical ring with a larger diameter. The inner conical ring has an inner ring at its larger end, which is adapted to be fitted into the fitting ring groove. The inner ring protrudes out of the connecting ring and is used to fit into the groove at the end of the main shaft of the internal combustion engine body.

[0006] As a preferred embodiment, the inner wall of the outer conical ring is provided with an anti-rotation groove, and an anti-rotation block is provided between the end face of the inner ring and the outer surface of the inner conical ring, which is suitable for fitting with the anti-rotation groove to limit the stability of the pressure plate relative to the constraint plate.

[0007] As a preferred embodiment, there are several anti-rotation blocks and anti-rotation grooves, and their quantity and position correspond to each other, so that the mass distribution of the pressure plate and the constraint plate is uniform.

[0008] As a preferred embodiment, there are at least three through holes, which are equidistantly arranged around the axis of the connecting ring to ensure the uniformity of the connector distribution and improve the connection stability.

[0009] As a preferred embodiment, both the inner and outer surfaces of the inner conical ring are conical, and both the inner and outer surfaces of the outer conical ring are conical, so that the inner conical ring, the outer conical ring, and the thrust bearing of the internal combustion engine main shaft can fit together well.

[0010] As a preferred embodiment, the inner and outer walls of the inner liner ring are cylindrical, and the inner wall of the smaller diameter end of the outer conical ring is cylindrical, which is suitable for fitting with the outer surface of the inner liner ring, increasing the tightness of the fit between the pressure plate and the constraint plate, and improving the stability of the fit.

[0011] As a preferred embodiment, the end face of the connecting ring and the outer surface of the outer conical ring have a plurality of ribs, which are equidistantly arranged around the axis of the outer conical ring to further improve the structural strength of the bearing cover assembly.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] (1) By designing a bearing cover assembly consisting of two parts, a pressure plate and a constraint plate, the pressure plate is directly in contact with the main shaft bearing of the internal combustion engine and bears the main forced damage function, while the constraint plate is fixedly connected to the main body of the internal combustion engine and bears the main constraint function. The two parts separate the functions of the bearing cover and also separate the mass, making it easier to disassemble and assemble individual parts.

[0014] (2) By setting anti-rotation blocks on the outside of the bearing plate, the fit with the constraint plate is improved on the one hand, and the structural strength of the bearing plate is increased on the other hand. The ribs on the outside of the constraint plate also give the bearing plate high structural strength. This improves the structural strength of the entire bearing cover assembly without increasing its weight. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional schematic diagram of the overall structure of the high-strength internal combustion engine main bearing cap assembly.

[0016] Figure 2 This is a second three-dimensional schematic diagram of the overall structure of the high-strength internal combustion engine main bearing cap assembly.

[0017] Figure 3 This is a first perspective sectional view of the overall structure of the high-strength internal combustion engine main bearing cap assembly.

[0018] Figure 4 This is a second perspective sectional view of the overall structure of the high-strength internal combustion engine main bearing cap assembly.

[0019] Figure 5 This is a planar sectional view of the overall structure of the high-strength internal combustion engine main bearing cap assembly.

[0020] Figure 6 This is a three-dimensional structural diagram of the pressure plate of the main bearing cap assembly of this high-strength internal combustion engine.

[0021] Figure 7 This is a first three-dimensional structural schematic diagram of the constraint disc of the high-strength internal combustion engine main bearing cover assembly.

[0022] Figure 8 This is a second three-dimensional structural diagram of the constraint disc of the high-strength internal combustion engine main bearing cap assembly.

[0023] In the figure: 1. Pressure plate; 101. Inner conical ring; 102. Embedded ring; 103. Inner liner ring; 104. Blocking ring; 105. Anti-rotation block; 2. Constraint plate; 201. Outer conical ring; 202. Anti-rotation groove; 203. Connecting ring; 204. Rib; 205. Through hole; 206. Fitting ring groove. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] like Figure 1-8The high-strength internal combustion engine main bearing cap assembly shown includes two parts: a pressure plate 1 and a constraint plate 2. Both the pressure plate 1 and the constraint plate 2 are made of corrosion-resistant alloy material. The pressure plate 1 is an integral structure, and the constraint plate 2 is also an integral structure, but the hardness of the constraint plate 2 needs to be higher than that of the pressure plate 1. The main body of the pressure plate 1 is an inner conical ring 101. The inner and outer surfaces of the inner conical ring 101 are both conical surfaces, and the larger end of the inner and outer conical surfaces are in one direction and the smaller end is in another direction. The smaller diameter end of the inner conical ring 101 has a coaxial inner liner ring 103. The inner and outer walls of the inner liner ring 103 are both cylindrical surfaces, and the wall thickness of the inner liner ring 103 is uniform. The inner wall of the inner liner ring 103 has a retaining ring 104. The inner conical ring 101 is suitable for fitting the thrust bearing, and the retaining ring 104 is exactly abutting the smaller end of the thrust bearing.

[0029] The main body of the constraint disk 2 is the outer conical ring 201. Similarly, the inner and outer surfaces of the outer conical ring 201 are also conical surfaces. The inner wall of the outer conical ring 201 can fit perfectly with the outer surface of the inner conical ring 101. In fact, only most of the inner wall of the outer conical ring 201 is a conical surface. A portion of it, namely the inner wall of the smaller diameter end of the outer conical ring 201, is a cylindrical surface, which fits perfectly with the outer surface of the cylindrical surface of the inner lining ring 103. This restricts the degree of freedom of the inner lining ring 103, improves the fit between the pressure plate 1 and the constraint disk 2, and thus improves the relative stability after the fit.

[0030] The outer tapered ring 201 also has a connecting ring 203 at its larger diameter end. The connecting ring 203 protrudes from the larger end of the outer tapered ring 201. The connecting ring 203 has several through holes 205. There are at least three through holes 205, and usually there are six or eight such even numbers. These through holes 205 are arranged equidistantly around the axis of the connecting ring 203 for bolts to pass through and fix the constraint plate 2 to the internal combustion engine body. In this way, the constraint plate 2 can constrain the pressure plate 1 to the end of the main shaft and constrain the bearing of the main shaft.

[0031] The end face of the connecting ring 203 and the outer side of the outer conical ring 201 have several ribs 204, which further improve the structural strength of the constraint disk 2. These ribs 204 are equidistantly arranged around the axis of the outer conical ring 201, making the mass distribution of the constraint disk 2 more uniform, so that the center of gravity falls on its own axis.

[0032] Because the connecting ring 203 protrudes from the end face of the outer conical ring 201 with a larger diameter, a fitting groove 206 is formed between the inner wall of the connecting ring 203 and the end face of the outer conical ring 201 with a larger diameter. The larger end of the inner conical ring 101 has an inner ring 102 with a larger diameter, which fits perfectly into the fitting groove 206. Furthermore, because the thickness of the inner ring 102 is greater than the depth of the fitting groove 206, the inner ring 102 protrudes from the connecting ring 203. The protruding part of the inner ring 102 is used to be embedded in the groove structure at the end of the main shaft of the engine body. The inner wall of the outer cone ring 201 is provided with a number of anti-rotation grooves 202. Correspondingly, there are a number of anti-rotation blocks 105 between the end face of the inner ring 102 and the outer side of the inner cone ring 101. The number and position of the anti-rotation blocks 105 and the anti-rotation grooves 202 are corresponding. The anti-rotation blocks 105 can correspond one-to-one with the anti-rotation grooves 202 and fit together to prevent the pressure plate 1 from rotating relative to the constraint plate 2.

[0033] Working principle: In use, first assemble the pressure plate 1 and the constraint plate 2, then place the inner cone ring 101 into the outer cone ring 201, and ensure that the anti-rotation block 105 and the anti-rotation groove 202 are engaged one-to-one. Then, fasten them together onto the bearing of the internal combustion engine main shaft. The bearing slides into the inner cone ring 101 until it reaches the blocking ring 104. The inner ring 102 slides into the groove at the end of the main shaft of the internal combustion engine body. Adjust the angle of the connecting ring 203 so that the through hole 205 aligns with the threaded hole on the internal combustion engine. Then, pass the bolt through the through hole 205 and engage it with the internal threaded hole. Until the constraint plate 2 is completely fixed, under the joint constraint of the constraint plate 2 and the internal combustion engine body, the pressure plate 1 also maintains a stable configuration, providing a stable constraint effect on the bearing of the main shaft. When the bearing is subjected to the force of the main shaft, it will be directly transmitted to the pressure plate 1. Although the constraint plate 2 will also be subjected to force, since the hardness of the pressure plate 1 is not as high as that of the constraint plate 2, the mechanical damage caused by long-term operation will remain on the pressure plate 1. When the bearing end cover is replaced, only the pressure plate 1 needs to be replaced, and the constraint plate 2 does not need to be replaced, thus reducing the replacement cost.

[0034] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A high-strength main bearing cap assembly for an internal combustion engine, characterized in that, include: The pressure plate (1) has an inner conical ring (101) as its main body. The inner conical ring (101) has an inner liner ring (103) at the smaller diameter end. The inner liner ring (103) has a blocking ring (104) on its inner wall. The constraint disk (2) has an outer conical ring (201) as its main body. The inner wall of the outer conical ring (201) is adapted to fit against the outer side of the inner conical ring (101). The outer conical ring (201) also has a connecting ring (203) at the larger diameter end. The connecting ring (203) has several through holes (205) for bolts to pass through.

2. The high-strength internal combustion engine main bearing cap assembly as described in claim 1, characterized in that: A fitting ring groove (206) is formed between the inner wall of the connecting ring (203) and the end face of the outer conical ring (201) with a larger diameter. The inner conical ring (101) has an inner ring (102) at its larger end. The inner ring (102) is adapted to be fitted into the fitting ring groove (206) and protrudes out of the connecting ring (203).

3. The high-strength internal combustion engine main bearing cap assembly as described in claim 2, characterized in that: The inner wall of the outer conical ring (201) is provided with an anti-rotation groove (202), and an anti-rotation block (105) is provided between the end face of the inner ring (102) and the outer side of the inner conical ring (101), which is suitable for fitting with the anti-rotation groove (202).

4. The high-strength internal combustion engine main bearing cap assembly as described in claim 3, characterized in that: There are several anti-rotation blocks (105) and anti-rotation grooves (202), and their quantity and position are corresponding.

5. The high-strength internal combustion engine main bearing cap assembly as described in claim 4, characterized in that: There are at least three through holes (205), which are equidistantly arranged around the axis of the connecting ring (203).

6. The high-strength internal combustion engine main bearing cap assembly as described in any one of claims 1 to 5, characterized in that: The inner and outer surfaces of the inner conical ring (101) are both conical, and the inner and outer surfaces of the outer conical ring (201) are both conical.

7. The high-strength internal combustion engine main bearing cap assembly as described in claim 6, characterized in that: The inner and outer walls of the inner lining ring (103) are cylindrical, and the inner wall of the smaller diameter end of the outer conical ring (201) is cylindrical, which is suitable for fitting with the outer surface of the inner lining ring (103).

8. The high-strength internal combustion engine main bearing cap assembly as described in claim 6, characterized in that: The end face of the connecting ring (203) and the outer side of the outer conical ring (201) have a plurality of ribs (204), which are equidistantly arranged around the axis of the outer conical ring (201).

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