CN110425054B

CN110425054B - Main bearing hole structure of engine and engine with same

Info

Publication number: CN110425054B
Application number: CN201910562622.6A
Authority: CN
Inventors: 张红雨; 胡琦山; 蔡强; 赵文彬
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-07-28
Anticipated expiration: 2039-06-26
Also published as: CN110425054A

Abstract

The invention relates to the technical field of engines, in particular to a main bearing hole structure of an engine and the engine with the same. The invention aims to solve the technical problems of complex manufacturing process and high maintenance cost of the upper main bearing hole of the existing engine. The main bearing hole structure comprises a main body of the engine and a main bearing cover arranged on the main body, wherein a first half bearing hole is formed in the position, attached to the main bearing cover, of the main body, a second half bearing hole matched with the first half bearing hole is formed in the position, attached to the main body, of the main bearing cover, a first bearing bush is arranged in the first half bearing hole, and the first bearing bush and the second half bearing hole form a main bearing hole under the condition that the main bearing cover is arranged on the main body. The main bearing hole is formed by the first bearing bush on the machine body and the second half bearing hole on the main bearing cover, so that the manufacturing difficulty of the main bearing hole is reduced, and the maintenance cost of the main bearing hole is reduced.

Description

Main bearing hole structure of engine and engine with same

Technical Field

The invention relates to the technical field of engines, in particular to a main bearing hole structure of an engine and the engine with the same.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

The main bearing hole of the engine needs to be processed by assembling the main bearing cover and the engine body after machining, each main bearing cover is in one-to-one correspondence with the corresponding engine body after machining, and each main bearing cover can only be applied to one engine body.

Disclosure of Invention

The invention provides a main bearing hole structure of an engine, aiming at least solving the technical problems of complex manufacturing process and high maintenance cost of the main bearing hole of the engine in the prior art, and the aim is realized by the following technical scheme:

the invention provides a main bearing hole structure of an engine, which comprises a body of the engine and a main bearing cover arranged on the body, wherein a first half bearing hole is formed in the position, attached to the main bearing cover, of the body, a second half bearing hole matched with the first half bearing hole is formed in the position, attached to the body, of the main bearing cover, the main bearing hole structure further comprises a first bearing bush arranged in the first half bearing hole, and the first bearing bush and the second half bearing hole form a main bearing hole under the condition that the main bearing cover is arranged on the body.

As can be understood by those skilled in the art, the invention reduces the manufacturing difficulty of the main bearing hole and reduces the maintenance cost of the main bearing hole by arranging the first bearing shell in the first half bearing hole of the engine and forming the main bearing hole by the first bearing shell and the second half bearing hole on the main bearing cover.

Preferably, the inner wall of the first half bearing hole is provided with a first positioning groove, and the outer wall of the first bearing bush is provided with a first positioning rib matched with the first positioning groove.

Preferably, the main bearing hole structure further comprises a second bearing bush and a third bearing bush which are matched with each other, the second bearing bush is installed on the first bearing bush, and the third bearing bush is installed in the second half bearing hole.

Preferably, the inner wall of the first bearing bush is provided with a second positioning groove, and the outer wall of the second bearing bush is provided with a second positioning rib matched with the second positioning groove.

Preferably, the inner wall of the second half bearing hole is provided with a third positioning groove, and the outer wall of the third bearing bush is provided with a third positioning rib matched with the third positioning groove.

Preferably, the third positioning grooves and the first positioning grooves are located on the same side of the main bearing hole, and the third positioning grooves and the first positioning grooves are distributed in a staggered manner.

Preferably, the third positioning groove and the second positioning groove are located on two sides of the main bearing hole.

Preferably, the material of the first bearing shell is the same as that of the main bearing cap.

Preferably, the first bearing shell is provided with an oil hole, and the machine body is provided with an oil passage communicated with the oil hole.

A second aspect of the invention provides an engine having a crankshaft mounted thereto via a main bearing bore arrangement of the engine of the first aspect of the invention.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic view of a main bearing bore configuration of an engine according to one embodiment of the present invention;

FIG. 2 is a schematic view of the first and second bearing half bores of the engine of FIG. 1;

FIG. 3 is a schematic view of an assembly structure of a first bearing half and a first bearing bush of the engine shown in FIG. 1;

fig. 4 is a schematic structural view of an engine according to an embodiment of the present invention.

10, an engine; 11. a body; 111. a first half bearing bore; 112. a first positioning groove; 12. a main bearing cap; 121. a second half-bearing bore; 122. a third positioning groove; 13. a first bearing shell; 131. a first positioning rib; 132. a second positioning groove; 133. an oil hole; 14. and fastening the bolt.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the application of the main bearing hole structure to the engine is only a preferred embodiment, and is not intended to limit the application scope of the main bearing hole structure in the present invention, for example, the main bearing hole structure in the present invention may also be applied to the bearing hole of other equipment, and such adjustment does not depart from the protection scope of the main bearing hole structure in the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

Although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," "third," and "fourth," as well as other numerical terms, when used herein do not imply a sequence or order unless clearly indicated by the context. In addition, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be construed broadly, e.g., as a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

For convenience of description, spatially relative terms, such as "upper", "inner", "outer", "side", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, according to an embodiment of the present invention, a first aspect of the present invention provides a main bearing hole structure of an engine 10, the main bearing hole structure includes a body 11 of the engine 10 and a main bearing cap 12 mounted on the body 11, a first half bearing hole 111 is provided on the body 11 at a position attached to the main bearing cap 12, a second half bearing hole 121 matched with the first half bearing hole 111 is provided on the main bearing cap 12 at a position attached to the body 11, the main bearing hole structure further includes a first bearing shell 13 disposed in the first half bearing hole 111, and in a case where the main bearing cap 12 is mounted on the body 11, the first bearing shell 13 and the second half bearing hole 121 constitute a main bearing hole. Further, the material of the first bearing shell 13 in the present embodiment is the same as the material of the main bearing cap 12.

In the present embodiment, the first bearing shell 13 is disposed in the first half-bearing hole 111 of the engine 10, and the first bearing shell 13 and the second half-bearing hole 121 on the main bearing cap 12 form a main bearing hole, so as to reduce the manufacturing difficulty of the main bearing hole and reduce the maintenance cost of the main bearing hole. Specifically, in the present embodiment, the main bearing hole is designed to be a single replaceable structure through the first bearing shell 13 and the main bearing cap 12, and if there is any problem in the use process of the main bearing hole, the first bearing shell 13 and the main bearing cap 12 can be directly replaced with new components, so as to reduce the influence of the damage of the main bearing hole on the whole engine 10. Further, the material of the first bearing shell 13 in this embodiment is the same as that of the main bearing cap 12, so that a tool with a suitable hardness can be conveniently selected when a main bearing hole is machined, and the service life of the tool is prolonged.

With continuing reference to fig. 1, and with further reference to fig. 2 and 3, according to an embodiment of the present invention, the inner wall of the first half-bearing hole 111 is provided with a first positioning groove 112, and the outer wall of the first bearing shell 13 is provided with a first positioning rib 131 matching with the first positioning groove 112.

In this embodiment, the inner diameter of the first bearing shell 13 is the same as the inner diameter of the second half-bearing hole 121 on the main bearing cap 12, before the main bearing cap 12 is assembled on the machine body 11, the first bearing shell 13 is assembled in the first half-bearing hole 111 on the machine body 11, the first positioning rib 131 on the first bearing shell 13 is matched with the first positioning groove 112 on the machine body 11, the first positioning groove 112 is matched with the first positioning rib 131 to axially position the first bearing shell 13, then the main bearing cap 12 is assembled on the machine body 11, and the second half-bearing hole 121 on the main bearing cap 12 is corresponding to the first half-bearing hole 111 on the machine body 11, meanwhile, the inner diameter of the second half-bearing hole 121 is smaller than the inner diameter of the first half-bearing hole 111, the outer diameter of the first bearing shell 13 is larger than the inner diameter of the second half-bearing hole 121, the inner diameter of the first bearing shell 13 is the same as the inner diameter of the second half-bearing hole 121, so that the bottom of the main bearing cap 12 can be pressed on the top of, therefore, the first bearing bush 13 is circumferentially positioned, the main bearing cap 12 is fastened to the machine body 11 through the fastening bolt 14, and finally the main bearing cap 12 and the machine body 11 are combined to process a main bearing hole, so that the requirement of the main bearing hole on coaxiality is met. If the main bearing hole has quality problems in the using process, the main bearing cover 12 and the first bearing bush 13 can be replaced and then secondary processing is carried out, the influence of the main bearing hole on other parts on the machine body 11 is reduced, and the maintenance cost of the main bearing hole is reduced.

With continued reference to fig. 1, 2 and 3, the main bearing hole structure further includes a second bearing shell (not shown) and a third bearing shell (not shown) that are matched to each other, the second bearing shell being mounted on the first bearing shell 13, and the third bearing shell being mounted in the second half bearing hole 121, according to an embodiment of the present invention. Specifically, the inner wall of the first bearing shell 13 is provided with a second positioning groove 132, and the outer wall of the second bearing shell is provided with a second positioning rib matched with the second positioning groove 132. The inner wall of the second half-bearing hole 121 is provided with a third positioning groove 122, and the outer wall of the third bearing bush is provided with a third positioning rib matched with the third positioning groove 122.

In this embodiment, be used for installing the slide bearing in the main bearing hole, the slide bearing includes second axle bush and third axle bush, the inner wall of first axle bush 13 is located in the installation of second axle bush, the third axle bush is installed in half bearing hole 121 of second of main bearing cap 12, in order to reduce slide bearing and rotate at the relative first axle bush 13 of during operation second axle bush, this embodiment is provided with second constant head tank 132 at the inner wall of first axle bush 13, and simultaneously, be provided with the second location muscle with second constant head tank 132 complex in the outer wall of second axle bush, through second constant head tank 132 and second location muscle reduction second axle bush and the first axle bush 13 between the phenomenon of axial sliding appears. Similarly, in order to reduce the rotation of the third bearing shell relative to the second half-bearing hole 121 during the operation of the sliding bearing, the third positioning groove 122 is disposed on the inner wall of the second half-bearing hole 121, and meanwhile, the third positioning rib engaged with the third positioning groove 122 is disposed on the outer wall of the third bearing shell, so that the axial sliding phenomenon between the third bearing shell and the second half-bearing hole 121 is reduced by the third positioning groove 122 and the third positioning rib

Further, according to an embodiment of the present invention, the third positioning groove 122 and the first positioning groove 112 are located on the same side of the main bearing hole, and the third positioning groove 122 and the first positioning groove 112 are distributed in a staggered manner, and the third positioning groove 122 and the second positioning groove 132 are located on two sides of the main bearing hole. In the embodiment, the third positioning grooves 122 and the first positioning grooves 112 are distributed in a staggered manner, and the third positioning grooves 122 and the second positioning grooves 132 are disposed on two sides of the main bearing hole, so as to reduce the stress concentration in the main bearing hole, thereby improving the structural stability of the main bearing hole.

With continued reference to fig. 1, 2 and 3, according to an embodiment of the present invention, the first bearing shell 13 is provided with an oil hole 133, and the body 11 is provided with an oil passage communicating with the oil hole 133.

In this embodiment, the first bearing shell 13 is provided with the oil hole 133, so that the lubricating oil in the machine body 11 can flow into the second bearing shell through the oil passage and the oil hole 133, thereby achieving the purpose of lubricating the crankshaft.

As shown in fig. 4, a second aspect of the present invention provides an engine 10, where the engine 10 is provided with a crankshaft, and the crankshaft is mounted to the engine 10 through a main bearing hole structure of the engine 10 of the first aspect of the present invention. Therefore, the engine 10 of the present embodiment has all the technical effects of the main bearing hole structure of the engine 10 of the present embodiment, and the specific structure and technical effects of the engine 10 will not be described in detail herein. It should be noted that the present embodiment only details the key technical features related to the present application, and the technical features not related to the present application are simply illustrated and described in the present embodiment, for example, the present embodiment only simply illustrates and simply describes the engine 10, and the specific structure of the engine 10 is not described in detail herein.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A main bearing hole structure of an engine is characterized in that the main bearing hole structure comprises an engine body of the engine and a main bearing cover arranged on the engine body, a first half bearing hole is formed in the position, attached to the main bearing cover, of the engine body, a second half bearing hole matched with the first half bearing hole is formed in the position, attached to the engine body, of the main bearing cover, the main bearing hole structure further comprises a first bearing bush arranged in the first half bearing hole, under the condition that the main bearing cover is arranged on the engine body, the first bearing bush and the second half bearing hole form a main bearing hole, a first positioning groove is formed in the inner wall of the first half bearing hole, first positioning ribs matched with the first positioning groove are arranged on the outer wall of the first bearing bush, and the first bearing bush is made of the same material as that of the main bearing cover, before the main bearing cap is assembled on the machine body, the first bearing bush is assembled in the first half bearing hole on the machine body, the first positioning rib on the first bearing bush is matched with the first positioning groove on the machine body, then the main bearing cap is assembled on the machine body, the outer diameter of the first bearing bush is larger than the inner diameter of the second half bearing hole, the inner diameter of the first bearing bush is the same as the inner diameter of the second half bearing hole, so that the bottom of the main bearing cap can be pressed on the top of the first bearing bush, and finally the main bearing cap and the machine body are combined to process a main bearing hole.

2. A main bearing bore structure of an engine according to claim 1, further comprising a second bearing shell and a third bearing shell mated with each other, the second bearing shell being mounted on the first bearing shell and the third bearing shell being mounted in the second half bearing bore.

3. The main bearing hole structure of the engine according to claim 2, wherein the inner wall of the first bearing shell is provided with a second positioning groove, and the outer wall of the second bearing shell is provided with a second positioning rib engaged with the second positioning groove.

4. The main bearing hole structure of engine according to claim 3, wherein the inner wall of the second half bearing hole is provided with a third positioning groove, and the outer wall of the third bearing shell is provided with a third positioning rib engaged with the third positioning groove.

5. The main bearing hole structure of claim 4, wherein the third positioning grooves and the first positioning grooves are located on the same side of the main bearing hole, and the third positioning grooves and the first positioning grooves are distributed in a staggered manner.

6. The main bearing hole structure of engine according to claim 4, wherein said third positioning groove and said second positioning groove are located on both sides of said main bearing hole.

7. The main bearing hole structure of an engine according to any one of claims 1 to 6, wherein the material of the first bearing shell is the same as the material of the main bearing cap.

8. The main bearing hole structure of an engine according to claim 7, wherein an oil hole is provided in the first bearing shell, and an oil passage communicating with the oil hole is provided in the engine body.

9. An engine provided with a crankshaft, characterized in that the crankshaft is mounted to the engine through a main bearing hole structure of the engine according to any one of claims 1 to 8.