CN209892608U

CN209892608U - Crank pin for engine

Info

Publication number: CN209892608U
Application number: CN201920573105.4U
Authority: CN
Inventors: 王涛远; 刘树滋; 尚丹鸽
Original assignee: QINGDAO SHENGDE MACHINE MANUFACTURE CO Ltd
Current assignee: QINGDAO SHENGDE MACHINE MANUFACTURE CO Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-01-03
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses a crank pin for an engine, which comprises a crank pin body provided with an oil hole in the axial direction, wherein the end part of the oil hole is provided with a blocking accommodating section for installing a block, and the blocking accommodating section is a conical pipe section with a smaller opening at the outer end; the plug is a plastic plug and is arranged in the plug accommodating section in an interference manner. Above-mentioned crank pin has obviously improved the leakproofness of crank pin oilhole through the toper pipeline section setting to blockking up the holding section, and the plasticity even also is difficult for deviating from blockking up the holding section under the great condition of atress blockking up, and the influence that the aperture systematic nature changed is difficult to be received in the plasticity simultaneously blockking up.

Description

Crank pin for engine

Technical Field

The utility model relates to an engine equipment technical field especially relates to a crank pin for engine.

Background

With the development of industrial technology, automobiles, motorcycles and the like become indispensable tools for human life, leisure and entertainment, engines in the automobiles and the motorcycles play a crucial role, and crankshafts are heart parts in the engines, so that the high quality of the crankshafts can ensure the efficient operation of the engines, and the sealing of oil holes of crank pins in the crankshafts directly affects the performance of the engines, and is of great importance to the service life of the engines and the safety of the engines.

Among the prior art crank pin, its oilhole axial is straight, blocks up the tapering in addition, and the outer end is big, and inner is little, after will blocking up to impress in the crank pin oilhole, blocks up outer end and crank pin oilhole contact, only is line contact, and area of contact is little, when the crank pin oil circuit leads to oil, bears the ability of oil circuit pressure not enough. In addition, when the diameter of the crank pin oil hole changes due to system errors, interference magnitude between the blockage and the crank pin oil hole changes, and when the interference magnitude is small, the blockage is easy to fall off when an oil passage is filled with oil; when the interference is large, the plug is easily plastically deformed, and the elasticity is insufficient, resulting in oil leakage or falling off.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a crank pin for engine, the leakproofness is good, difficult oil leak, oil impregnate.

In order to achieve the purpose, the utility model provides a crank pin for an engine, which comprises a crank pin body provided with an oil hole in the axial direction, wherein the end part of the oil hole is provided with a blocking accommodating section for installing a block, and the blocking accommodating section is a conical pipe section with a smaller opening at the outer end; the plug is a plastic plug and is arranged in the plug accommodating section in an interference manner.

Preferably, both end portions of the oil hole have the blockage accommodating sections, and the blockage accommodating sections are provided with the blockages.

Preferably, the taper of the tapered pipe section is 2-4 degrees.

Preferably, the taper of the tapered tube section is 3 degrees.

Preferably, the plug is a low carbon steel plug and has a hardness of less than 200 HB.

The crank pin for the engine comprises a crank pin body with an axially arranged oil hole, wherein two end parts of the oil hole are respectively provided with a blocking accommodating section for installing a block, and the blocking accommodating sections are conical pipe sections with smaller openings at the outer ends; the plug is a plastic plug and is arranged in the plug accommodating section in an interference manner. Above-mentioned crank pin has obviously improved the leakproofness of crank pin oilhole through the toper pipeline section setting to blockking up the holding section, and the plasticity even also is difficult for deviating from blockking up the holding section under the great condition of atress blockking up, and the influence that the aperture systematic nature changed is difficult to be received in the plasticity simultaneously blockking up.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a cross-sectional schematic view of a prior art crank pin for an engine;

FIG. 2 is a schematic cross-sectional view of a crank pin body for an engine according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a plug in a crank pin for an engine according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of the crank pin body and the plug for the engine according to an embodiment of the present invention.

The reference numerals in fig. 1 to 4 are as follows:

1-a crank pin body; 11-oil hole; 12-a plug accommodating section; 13-clogging.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses the core provides a crank pin for engine, and the leakproofness is good, difficult oil leak, oil impregnate.

Referring to fig. 1-4, fig. 1 is a cross-sectional view of a crank pin for an engine according to the prior art; FIG. 2 is a schematic cross-sectional view of a crank pin body for an engine according to an embodiment of the present invention; FIG. 3 is a schematic cross-sectional view of a plug in a crank pin for an engine according to an embodiment of the present invention; fig. 4 is a schematic cross-sectional view of the crank pin body and the plug for the engine according to an embodiment of the present invention.

In a specific embodiment, the utility model provides a crank pin for engine, including crank pin body 1, its oilhole 11 that has the axial setting, oilhole 11 are the through-hole, and its tip is provided with and blocks up accommodation section 12, thereby it is used for the installation to block up 13 and seals oilhole 11.

The plug accommodating section 12 is a tapered pipe section with a smaller outer end opening and a larger inner end opening, i.e. the inner side surface of the pipe section is an inclined surface, the inclined surface is not parallel to the middle part of the oil hole 11, and forms a certain angle with the outer end surface (the surface perpendicular to the axial direction) of the oil hole 11, the angle is usually not too large, only 2-4 degrees, and 3 degrees is the best, and if the angle is too large, the installation of the plug 13 is inconvenient. Meanwhile, the diameter of the plug 13 is not easily too large, and is usually slightly larger than the inner hole diameter of the plug accommodating section 12.

The tapered tube segment type blockage accommodating segment 12 may be provided at only one end of the oil hole 11, or may be provided at both ends of the oil hole 11, so that the sealing property of the oil hole 11 is further enhanced.

Correspondingly, the plug 13 is plastic plug, so that the plug 13 has certain plasticity and is more adaptable to the tapered pipe section, and the sealing performance of the plug 13 is not easy to reduce due to systematic change of the hole diameter of the oil hole 11; and the sealing device is arranged in the blocking accommodating section 12 in an interference manner, so that the sealing effect is reliable and guaranteed.

After the plug 13 is installed in the plug accommodating section 12, the inclined surface can form extrusion towards the inner side direction of the oil hole 11 with the circumferential outer side surface of the plug 13, and the inclined surface and the circumferential outer side surface are in surface-to-surface contact, so that the sealing effect can be obviously improved, and the plug 13 is not easy to fall out of the oil hole 11 when being stressed greatly.

Specifically, the material of the plug 13 can be low-carbon steel, the plasticity is good, and the sealing effect of the plug 13 is better when the hardness of the low-carbon steel is less than 200 HB.

As an improvement, the plastic plug 13 may be set in an initial state, for example, the plastic plug 13 may be set in a convex spherical shape on the outer side and a concave spherical shape on the inner side (as shown in fig. 3), and then the plastic plug 13 may be installed into the plug accommodating section 12 with the inner side facing inward, and may be pressed inward to form a plate shape and form an interference fit with the plug accommodating section 12. At the moment, the plastic plug 13 has stronger bearing capacity, is more difficult to separate from the plug accommodating section and is not easily influenced by the systematic change of the aperture.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above is to the crank pin for engine provided by the present invention. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A crank pin for an engine is characterized by comprising a crank pin body, a crank pin body and a crank pin body, wherein the crank pin body is provided with an oil hole in the axial direction, the end part of the oil hole is provided with a blockage accommodating section for installing blockage, and the blockage accommodating section is a conical pipe section with a small opening at the outer end; the plug is a plastic plug and is arranged in the plug accommodating section in an interference manner.

2. A crankpin for an engine according to claim 1, wherein both end portions of the oil hole have the plug accommodating sections each provided with the plug.

3. A crankpin for an engine as claimed in claim 1, characterised in that the taper of the tapered tube section is 2-4 degrees.

4. A crankpin for an engine as claimed in claim 3, characterised in that the taper of the tapered tube section is 3 degrees.

5. The crankpin for an engine according to claim 1,

the plug is low carbon steel plug and the hardness of the plug is less than 200 HB.