CN214945783U

CN214945783U - Bearing bush assembly and engine with same

Info

Publication number: CN214945783U
Application number: CN202023145907.7U
Authority: CN
Inventors: 崔婷婷; 王翔
Original assignee: Shenzhen Zhenyu New Energy Power Technology Co Ltd
Current assignee: Shenzhen Zhenyu New Energy Power Technology Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-11-30
Anticipated expiration: 2030-12-23

Abstract

The utility model discloses a bearing bush subassembly and have engine of this bearing bush subassembly. This axle bush subassembly includes: the bearing comprises a first bearing bush, a second bearing bush and a bearing shell, wherein the inner surface of the first bearing bush is provided with a first oil groove extending along the circumferential direction of the first bearing bush, the first oil groove is internally provided with an oil hole, and the oil hole penetrates through the bush wall of the first bearing bush; the second bearing bush is suitable for being buckled with the first bearing bush to form a shaft mounting part in a surrounding mode, a transition oil groove is formed in the joint of the second bearing bush and the first bearing bush, and the transition oil groove is communicated with the first oil groove. According to the utility model discloses a bearing bush subassembly is through setting up the transition oil groove, is favorable to oil film thickness to form, can improve the direct friction condition between bearing bush subassembly and the bent axle for it is good to lubricate between bearing bush subassembly and the bent axle, and is favorable to particle impurity to discharge, reduces the emergence of burning tile.

Description

Bearing bush assembly and engine with same

Technical Field

The utility model relates to the technical field of engines, particularly, relate to a bearing bush subassembly and have this bearing bush subassembly's engine.

Background

The bearing bush of the engine has the functions of reducing the friction resistance of a shaft neck and reducing the abrasion of the shaft neck, and is arranged on a main bearing seat of a machine body. When the bearing bush works, a layer of thin oil film is required to play a role in lubrication between the bearing bush and the crankshaft. If the lubrication is poor, direct friction exists between the bearing bush and the crankshaft, the friction can generate high temperature, and the high temperature can cause the bearing bush to be burnt out. The bearing shell may be burnt due to the factors of excessive load, excessive temperature, impurities in the lubricating oil or abnormal viscosity. The crankshaft can be abraded after the bearing bush is burnt, abnormal sound and even axle seizure of the engine are caused, and the engine can be scrapped when the engine is serious.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a bearing bush subassembly can improve the direct friction condition between axle bush and the bent axle.

The utility model also provides an engine of having above-mentioned axle bush subassembly.

According to the utility model discloses axle bush subassembly includes: the bearing comprises a first bearing bush, a second bearing bush and a bearing shell, wherein the inner surface of the first bearing bush is provided with a first oil groove extending along the circumferential direction of the first bearing bush, the first oil groove is internally provided with an oil hole, and the oil hole penetrates through the bush wall of the first bearing bush; the second bearing bush is suitable for being buckled with the first bearing bush to form a shaft mounting part in a surrounding mode, a transition oil groove is formed in the joint of the second bearing bush and the first bearing bush, and the transition oil groove is communicated with the first oil groove.

According to the utility model discloses axle bush subassembly through setting up the transition oil groove, is favorable to oil film thickness to form, can improve the direct friction condition between axle bush subassembly and the bent axle for it is good to lubricate between axle bush subassembly and the bent axle, and is favorable to granule impurity to discharge, reduces the emergence of burning tile.

According to some embodiments of the invention, the second bearing shell is provided with a transition oil groove.

Further, the transition oil groove extends circumferentially along the inner surface of the second bearing shell, and the total length of the transition oil grooves at both ends of the second bearing shell is smaller than the circumferential dimension of the second bearing shell.

According to some embodiments of the invention, the transition oil gallery is configured as a wedge-shaped oil gallery.

According to some embodiments of the invention, the transition oil groove has a deep groove end adapted to be docked with the first oil groove and a shallow groove end remote from the first oil groove.

Further, the transition oil groove gradually decreases in depth in a direction from the deep groove end toward the shallow groove end.

Optionally, the depth of the deep groove end is equal to the depth of the first oil groove.

Optionally, the shallow trench end engages an inner surface of the second bearing shoe.

According to some embodiments of the utility model, the surface of first axle bush is provided with first spacing arch, the surface of second axle bush is provided with the spacing arch of second.

According to the utility model discloses an engine of another aspect embodiment includes: the first bearing bush and the second bearing bush are buckled on a journal of the crankshaft.

The engine and the bearing bush assembly have the same advantages compared with the prior art, and the detailed description is omitted.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Figure 1 is a perspective view of a first bearing shell;

FIG. 2 is a front view of the first bearing shell;

FIG. 3 is a schematic sectional view taken along line A-A in FIG. 2;

FIG. 4 is a perspective view of the second bearing shoe;

FIG. 5 is a front view of the second bearing shell;

fig. 6 is a schematic sectional view taken along line B-B in fig. 5.

Reference numerals:

the bearing comprises a first bearing bush 1, a first oil groove 11, an oil hole 12, a first limit bulge 13, a second bearing bush 2, a transition oil groove 21, a deep groove end 211, a shallow groove end 212 and a second limit bulge 22.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "axial," "circumferential," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicate orientations or positional relationships that are based on the orientation or positional relationship illustrated in the drawings, and are used merely for convenience of description and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

A bearing bush assembly according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 6.

Referring to fig. 1 and 4, a bearing bush assembly according to an embodiment of the present invention may include: a first bearing bush 1 and a second bearing bush 2.

Referring to fig. 1 to 3, an inner surface of the first bearing shell 1 is provided with a first oil groove 11 extending in a circumferential direction of the first bearing shell 1, an oil hole 12 is formed in the first oil groove 11, the oil hole 12 penetrates through a shell wall of the first bearing shell 1, and particulate impurities inside the bearing shell assembly may be discharged through the oil hole 12.

The second bearing bush 2 is adapted to be engaged with the first bearing bush 1 to enclose a shaft mounting portion through which a shaft is adapted to be inserted, for example, when the bearing bush assembly is applied to an engine, the shaft may be a crankshaft, and the first and second bearing

bushes

1 and 2 are engaged on a journal of the crankshaft.

The shaft mounting portion has an aperture slightly larger than the diameter of the journal, and the journal partially contacts an inner surface of the bearing bush assembly when the crankshaft is stationary, thereby forming a wedge gap between the bearing bush assembly and the journal. When the crankshaft starts to rotate, direct friction can occur between the journal and the bearing bush component, but along with the rotation of the journal, lubricating oil is attached to the surface of the journal due to viscosity and is brought into a wedge-shaped gap between the journal and the bearing bush, oil in the wedge-shaped gap is divided into a plurality of layers, the moving speed of an oil layer in contact with the surface of the bearing bush component is zero, the moving speed of the oil layer in contact with the surface of the journal is the same as the linear speed of the journal, the oil brought in is increased along with the increase of the rotating speed of the journal, the oil pressure is continuously increased due to the fact that the area of the oil flow in the wedge-shaped gap is continuously reduced, when the pressure is increased to be enough to balance all acting force of the crankshaft on the bearing bush component, the journal is lifted by the oil film, the journal is suspended on the oil film to rotate, and the direct contact between the journal and the bearing bush component is avoided, and liquid friction is established.

Referring to fig. 4 to 6, a transition oil groove 21 is provided at a joint of the second bearing bush 2 and the first bearing bush 1, and the transition oil groove 21 communicates with the first oil groove 11. Through setting up the first oil groove 11 and the transition oil groove 21 that are linked together, be favorable to the formation of oil film thickness to improve the friction phenomenon between axle journal and the axle bush subassembly, make and lubricate between axle journal and the axle bush subassembly well, and, in the granule impurity accessible transition oil groove 21 in the second axle bush 2 reachs first oil groove 11, and then arrange to the axle bush subassembly outside through the oilhole 12 in the first oil groove 11, reduced the probability that the axle bush subassembly damaged.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

According to the utility model discloses the axle bush subassembly through setting up transition oil groove 21, is favorable to oil film thickness to form, can improve the direct friction condition between axle bush subassembly and the bent axle for it is good to lubricate between axle bush subassembly and the bent axle, and is favorable to granule impurity to discharge, reduces the emergence of burning tile.

Referring to fig. 4 to 6, both end portions of the second bearing shell 2 are provided with transition oil grooves 21.

Further, the transition oil groove 21 extends circumferentially along the inner surface of the second bearing bush 2, and the total length of the transition oil grooves 21 at both ends of the second bearing bush 2 is smaller than the circumferential dimension of the second bearing bush 2. For example, when the second bearing bush 2 is a semicircular bearing bush, the total length of the transition oil grooves 21 at both ends of the second bearing bush 2 is less than half of the circumference of the second bearing bush 2. That is, when the transition oil grooves 21 of both end portions of the second bearing shell 2 are located on the same circle, the transition oil grooves 21 of both end portions of the second bearing shell 2 do not contact. In this way, it is possible to prevent the transition oil grooves 21 at both end portions of the second bearing shoe 2 from excessively weakening the strength of the second bearing shoe 2, i.e., the strength at the break of the two transition oil grooves 21 is high.

Referring to fig. 4 and 6, the transition oil gallery 21 is configured as a wedge-shaped oil gallery. The wedge-shaped oil groove is an oil groove with one deep end and the other shallow end, so that lubricating oil can generate pressure difference at the two ends of the wedge-shaped oil groove conveniently after the shaft neck is matched with the bearing bush assembly, and an oil film can be formed conveniently.

Referring to fig. 1 and 4, the transition oil groove 21 has a deep groove end 211 and a shallow groove end 212, the deep groove end 211 is adapted to be abutted with the first oil groove 11, and the shallow groove end 212 is far away from the first oil groove 11. When the journal is matched with the bearing bush component, the pressure difference generated by the deep groove end 211 and the shallow groove end 212 is different, which is beneficial to accelerating the formation of an oil film between the journal and the bearing bush component.

Further, as shown in fig. 4 and 6, the depth of the transition oil groove 21 gradually decreases from the deep groove end 211 toward the shallow groove end 212. Therefore, the oil film of the lubricating oil shows a variation trend that one end is thick and the other end is thin in the transition oil groove 21, the variation trend is smooth, and unstable support of the oil film to the shaft neck caused by sudden change of the oil film thickness is prevented.

Alternatively, the depth of the deep groove end 211 is equal to the depth of the first oil groove 11. Therefore, the lubricating oil can smoothly transit between the deep groove end 211 and the first oil groove 11, the oil film thickness at the joint of the deep groove end 211 and the first oil groove 11 is not changed suddenly, and unstable support of the oil film to the shaft neck caused by the sudden change of the oil film thickness is prevented.

Optionally, the shallow groove end 212 engages with the inner surface of the second bearing shoe 2. In other words, the extreme depth of the shallow trench end 212 is zero, so that the oil film thickness gradually increases from the shallow trench end 212 to the deep trench end 211.

Referring to fig. 2 to 3, the width of the first bearing shell 1 is W1, the width of the first oil groove 11 is L1, the thickness of the first bearing shell 1 at the first oil groove 11 is H1, the thickness of the first bearing shell 1 except the first oil groove 11 is H1, the diameter of the oil hole 12 is Φ Q, the included angle between the oil hole 12 and the symmetry line of the first bearing shell 1 is α, the diameter of the first bearing shell 1 is Φ P1, and the depth of the first oil groove 11 is H1-H1.

Referring to fig. 5 to 6, the width of the second bearing shell 2 is W2, the width of the transition oil groove 21 is L2, the thickness of the second bearing shell 2 at the transition oil groove 21 is H2, the thickness of the second bearing shell 2 outside the transition oil groove 21 is H2, the central angle of the transition oil groove 21 at one end of the second bearing shell 2 is β 1, the central angle of the transition oil groove 21 at one end of the second bearing shell 2 is β 2, the diameter of the second bearing shell 2 is Φ P2, and the depth of the deep groove end 211 of the transition oil groove 21 is H2-H2.

Alternatively, W1 ═ W2, L1 ═ L2, H1 ═ H2, H1 ═ H2, Φ P1 ═ Φ P2, β 1 ═ β 2.

For example, in some alternative embodiments, W1-W2-18 mm, L1-L2-3 mm, H1-H2-1.4 mm, H1-H2-2.5 mm, Φ P1- Φ P2-57 mm, β 1- β 2-30 °, α -25 °, the depth of the first oil gallery 11 and the depth of the gallery end 211 of the transition oil gallery 21 are both 1.1 mm.

In some alternative embodiments, β 1 and β 2 may be set to different angular values, for example, β 1 ═ 45 °, and β 2 ═ 60 °. Of course, W1, W2, L1, L2, H1, H2, H1, H2, Φ P1, Φ P2, β 1, β 2, α can be selected from different values according to actual requirements, and are not listed here.

Referring to fig. 1, the outer surface of the first bearing shell 1 is provided with a first limit protrusion 13, thereby facilitating the fixing of the first bearing shell 1 to other parts (e.g., a bearing seat); referring to fig. 4, the outer surface of the second bearing shell 2 is provided with a second stopper protrusion 22, thereby facilitating the fixing of the second bearing shell 2 to other components (e.g., a bearing housing).

According to another aspect of the present invention, an engine includes: the first bearing bush 1 and the second bearing bush 2 are fastened to a journal of the crankshaft. The lubrication between the bearing bush component and the crankshaft is good, and particle impurities are easy to discharge, so that the bearing bush component is favorable for reducing the probability of bearing bush burning. The engine can be used on a vehicle to provide power for the vehicle.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A bearing bush assembly, comprising:

the bearing comprises a first bearing bush, a second bearing bush and a bearing shell, wherein the inner surface of the first bearing bush is provided with a first oil groove extending along the circumferential direction of the first bearing bush, the first oil groove is internally provided with an oil hole, and the oil hole penetrates through the bush wall of the first bearing bush;

the second bearing bush is suitable for being buckled with the first bearing bush to form a shaft mounting part in a surrounding mode, a transition oil groove is formed in the joint of the second bearing bush and the first bearing bush, and the transition oil groove is communicated with the first oil groove.

2. The bearing shell assembly of claim 1, wherein both ends of the second bearing shell are provided with the transition oil gallery.

3. The bearing shell assembly of claim 2, wherein the transition oil gallery extends circumferentially along an inner surface of the second bearing shell, and a total length of the transition oil gallery at both ends of the second bearing shell is less than a circumferential dimension of the second bearing shell.

4. A bearing shell assembly according to any of claims 1 to 3, wherein the transition oil gallery is configured as a wedge-shaped oil gallery.

5. A bearing shell assembly according to any of claims 1 to 3, wherein the transition oil gallery has a deep gallery end adapted to interface with the first oil gallery and a shallow gallery end remote from the first oil gallery.

6. The bearing shell assembly of claim 5, wherein the transition oil gallery has a decreasing depth in a direction from the deep gallery end to the shallow gallery end.

7. The bearing shell assembly of claim 5, wherein a depth of the deep groove end is equal to a depth of the first oil groove.

8. The bearing shell assembly of claim 5, wherein the shallow trench end engages an inner surface of the second bearing shell.

9. The bearing shell assembly as claimed in claim 1, wherein the outer surface of the first bearing shell is provided with a first stop lug and the outer surface of the second bearing shell is provided with a second stop lug.

10. An engine, comprising: a crankshaft and a bearing shell assembly as claimed in any of claims 1 to 9, the first and second bearing shells being snap-fitted onto a journal of the crankshaft.