CN219623063U - Crankshaft with through type oil duct hole - Google Patents
Crankshaft with through type oil duct hole Download PDFInfo
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- CN219623063U CN219623063U CN202320825969.7U CN202320825969U CN219623063U CN 219623063 U CN219623063 U CN 219623063U CN 202320825969 U CN202320825969 U CN 202320825969U CN 219623063 U CN219623063 U CN 219623063U
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Abstract
The utility model relates to a crankshaft with a through oil passage hole, which adopts a through oil passage hole structure extending from a shaft head end to a shaft tail end, when the crankshaft is used, lubricating oil with certain pressure enters the through oil passage hole structure from an axial oil inlet blind hole at the shaft head end and then flows out from an axial oil outlet blind hole at the shaft tail end, and the lubricating oil is fed into each radial through hole of each connecting rod neck in the flowing process of the through oil passage hole structure, so that the effects of lubrication, cooling and the like are achieved. The through type oil passage hole structure consists of a sectional type transition oil hole parallel to the axis and each radial through hole perpendicular to each transition oil hole, and each hole can be drilled by adopting the vertical rocker arm drill to be matched with the fixture, so that the problem of deep hole processing bottleneck of a crank oil passage is solved, the processing positioning difficulty is reduced, the processing precision is improved, the production efficiency is obviously improved, the product quality is ensured, and the consistency is good.
Description
Technical Field
The utility model relates to a crankshaft for an engine, in particular to a crankshaft with a through type oil passage hole, which is suitable for a low-rotation-speed engine.
Background
The crankshaft is one of important parts with relatively high manufacturing cost in the engine, and converts the force transmitted by the connecting rod into torque, so that other accessories of the engine are driven to work, the performance and the service life of the crankshaft determine the performance and the service life of the whole diesel engine, and the crankshaft is also the part which is most difficult to process in the engine.
When the engine works, in order to reduce friction resistance, reduce power consumption, reduce abrasion and prolong service life, lubricating oil must be introduced into the matching surfaces of the main journal and the connecting rod journal of the crankshaft and the bearing bush for lubrication, besides, the lubricating oil circulates in the system, and the comprehensive effects of cooling, rust prevention, friction surface cleaning, vibration reduction and the like are also achieved. The crankshaft is provided with an oil passage hole for leading in and out lubricating oil, and the oil passage hole is good or bad for the lubricating oil supply capacity and directly influences the service life of the crankshaft, so that strict precision requirements are met during the processing of the oil passage hole. The existing crank oil passage hole forms have three types:
referring to fig. 11, the first is to drill radial oil holes in the middle of the main journal and the connecting journal, respectively. The radial oil holes on the main journal are communicated with the radial oil holes on the connecting rod journal by drilling inclined holes on the crank, so that a lubricating oil path between the main journal and the connecting rod journal is formed. In order to ensure that lubricating oil enters from the main journal oil hole and flows out from the radial oil hole on the connecting rod journal only, a threaded hole is arranged at the inlet of the inclined hole of the crank, and a screw plug or a reaming assembly pin plug is arranged for sealing. Referring to fig. 12, the second is to drill a radial oil hole in the middle of the main journal and to pass through a crank drill hole in the middle of the connecting rod journal to the radial oil hole in the middle of the main journal, so that the main journal is communicated with the oil path of the connecting rod journal. Referring to fig. 13, the third is to form a lubrication oil passage by connecting the connecting rod neck and the main journal through the crank drilling oblique oil hole.
At present, the engine speed of some novel nonstandard special-shaped low-oil engine crankshafts is about 40-50 revolutions, and the novel nonstandard special-shaped low-oil engine crankshafts are different from the lubricating requirements of high-speed engines, and the structure and the requirements of oil passage holes are completely different from the requirements of the oil passage holes, but the novel nonstandard special-shaped low-oil engine crankshafts are in strict quality with the technical requirements of the oil passage holes of the six high-speed engines. Specifically, the crank shaft has the advantages that the crank shaft has the mass of more than 300kg, the turning radius of a main journal and a connecting rod journal is larger, according to the characteristics of small batch, abnormal nonstandard and the like, only about 500kg of special round steel can be directly used for finishing rough machining in a cutting machining mode, then finish machining is carried out, oil passage holes on the special round steel belong to deep holes, the longest operation length reaches 800mm, and the machining difficulty is large due to the length of inclined oil holes of a far-beyond-common high-speed machine. And the processing precision is affected by error accumulation caused by repeated installation and positioning, and the problems of low production efficiency, unstable product quality and the like are also solved.
Disclosure of Invention
The utility model aims to provide a crankshaft with a through oil passage hole, which is reasonable in structure and reliable in use, solves the problem of the bottleneck in deep hole processing of the existing crankshaft oil passage, reduces the processing and positioning difficulty, improves the processing precision, obviously improves the production efficiency, ensures the product quality and has good consistency.
The technical scheme of the utility model is as follows:
the utility model provides a bent axle with link-type oil duct hole, includes axle head end, axle tail end, a plurality of main shaft neck and a plurality of connecting rod neck, the axial lead coincidence of axle head end, axle tail end and main shaft neck, each connecting rod neck is around axial lead evenly distributed, and its technical essential is: the center of the end face of the shaft head end is provided with an axial oil inlet blind hole, the outer peripheral surface of the shaft head end is provided with a first radial through hole communicated with the axial oil inlet blind hole, the end face of the shaft head end is additionally provided with a first transition oil hole which is parallel to the axis and extends along the center line of a first connecting rod neck, the first transition oil hole is communicated with the first radial through hole, the tail end of the first transition oil hole extends into a first main journal, and the outer peripheral surface of the first connecting rod neck is provided with a second radial through hole communicated with the first transition oil hole; the outer circumferential surface of the first main journal is provided with a third radial through hole communicated with the first transition oil hole, the tail end of the third radial through hole extends to the center of the first main journal, and the outer circumferential surface of the first main journal is additionally provided with a fourth radial through hole communicated with the tail end of the third radial through hole;
the end face of the first main journal is provided with a second transition oil hole which is parallel to the axis and extends along the center line of the second connecting rod journal, the second transition oil hole is communicated with a fourth radial through hole, the outer circumferential surface of the second connecting rod journal is provided with a fifth radial through hole communicated with the second transition oil hole, the tail end of the second transition oil hole extends into the second main journal, the outer circumferential surface of the second main journal is provided with a sixth radial through hole communicated with the second transition oil hole, the tail end of the sixth radial through hole extends to the center of the second main journal, and the outer circumferential surface of the second main journal is additionally provided with a seventh radial through hole communicated with the tail end of the sixth radial through hole;
the end face of the second main journal is provided with a third transition oil hole which is parallel to the axial lead and extends along the central line of the third connecting rod journal, the third transition oil hole is communicated with a seventh radial through hole, the outer peripheral surface of the third connecting rod journal is provided with an eighth radial through hole communicated with the third transition oil hole, the tail end of the third transition oil hole extends into the third main journal, the outer peripheral surface of the third main journal is provided with a ninth radial through hole communicated with the third transition oil hole, the tail end of the ninth radial through hole extends to the center of the third main journal, and the outer peripheral surface of the third main journal is additionally provided with a tenth radial through hole communicated with the tail end of the ninth radial through hole;
and the like until the last transition oil hole in the last connecting rod neck extends to the end face of the shaft tail end, an axial oil outlet blind hole is formed in the center of the end face of the shaft tail end, and a last radial through hole which is communicated with the last transition oil hole and the axial oil outlet blind hole is formed in the outer peripheral surface of the shaft tail end.
The crankshaft with the through oil passage holes is characterized in that the distance from the center line of the connecting rod neck to the axis is smaller than the diameters of the shaft head end and the shaft tail end, a first operation avoidance hole and a second operation avoidance hole corresponding to the second transition oil hole and the third transition oil hole are formed in the end face of the shaft head end, a third operation avoidance hole corresponding to the third transition oil hole is formed in the end face of the first main shaft neck, and a fourth operation avoidance hole corresponding to the penultimate transition oil hole is formed in the end face of the shaft tail end.
In the crankshaft with the through-type oil passage hole, the first transition oil hole on the end face of the end of the shaft head, the tail end of the last transition oil hole on the end face of the end of the shaft, and the outer ends of the radial through holes on the outer peripheral surface of each main journal are plugged or provided with other parts.
The number of the main journals is four, the number of the connecting rod journals is five, the first connecting rod journal is positioned between the first main journal and the end of the shaft head, the last connecting rod journal is positioned between the last main journal and the end of the shaft, and the phase included angle between two adjacent connecting rod journals is 72 degrees.
The beneficial effects of the utility model are as follows:
when the through oil passage hole structure extending from the shaft head end to the shaft tail end is used, lubricating oil with certain pressure enters the through oil passage hole structure from the axial oil inlet blind hole at the shaft head end and flows out from the axial oil outlet blind hole at the shaft tail end, and the lubricating oil is fed into each radial through hole of each connecting rod neck in the flowing process of the through oil passage hole structure, so that the effects of lubrication, cooling and the like are achieved. The through type oil passage hole structure consists of a sectional type transition oil hole parallel to the axis and each radial through hole perpendicular to each transition oil hole, and each hole can be drilled by adopting the vertical rocker arm drill to be matched with the fixture, so that the problem of deep hole processing bottleneck of a crank oil passage is solved, the processing positioning difficulty is reduced, the processing precision is improved, the production efficiency is obviously improved, the product quality is ensured, and the consistency is good.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 5 is a cross-sectional view taken along the direction B-B in FIG. 1;
FIG. 6 is a cross-sectional view taken along the direction C-C in FIG. 1;
FIG. 7 is a sectional view taken along the direction D-D in FIG. 1;
FIG. 8 is a sectional view taken along the E-E direction in FIG. 1;
FIG. 9 is a cross-sectional view taken along the direction F-F in FIG. 1;
FIG. 10 is a sectional view taken along the direction G-G in FIG. 1;
FIG. 11 is a schematic view of a first prior art oil passage hole structure;
FIG. 12 is a schematic view of a second prior art oil passage hole structure;
fig. 13 is a schematic view of a third oil passage hole structure in the prior art.
In the figure: 1. a novel hydraulic oil control system comprises a shaft head end, 2.a first connecting rod neck, 3.a first main journal, 4.an axial oil inlet blind hole, 5.a second main journal, 6.a third connecting rod neck, 7.a third main journal, 8.a fourth connecting rod neck, 9.a fourth main journal, 10.a fifth connecting rod neck, 11.a shaft tail end, 12.a first radial through hole, 13.a first transition oil hole, 14.an axial oil inlet blind hole, 15.a second radial through hole, 16.a first operation avoidance hole, 17.a third radial through hole, 18.a second transition oil hole, 19.a fourth radial through hole, 20.a fifth radial through hole, 21.a sixth radial through hole, 22.a third transition oil hole, 23.an eighth radial through hole, 24.a ninth radial through hole, 25.a tenth radial through hole, 26.a fourth transition oil hole, 27.an eleventh radial through hole, 28.a fifth transition oil hole, 29.a twelfth radial through hole, 30.a fourteenth radial through hole, 31.a fifteenth radial through hole, 32.an axial oil outlet blind hole, 33.a fourth operation avoidance hole, 34.a thirteenth radial through hole, 37.a thirteenth operation avoidance hole.
Detailed Description
The utility model will be described in detail with reference to the drawings.
As shown in fig. 1 to 10, the crankshaft with the through-type oil passage hole comprises a shaft head end 1, a shaft tail end 11, four main journals and five connecting rod journals, wherein the shaft axes of the shaft head end 1, the shaft tail end 11 and the main journals are coincident, a first connecting rod journal 2 is positioned between a first main journal 3 and the shaft head end 1, a last connecting rod journal is positioned between a last main journal and the shaft tail end 11, the connecting rod journals are uniformly distributed around the shaft axis, and the phase included angle of two adjacent connecting rod journals is 72 degrees. The crankshaft is finished by cutting round steel, and the distance from the center line of the connecting rod neck to the axis line is smaller than the diameters of the shaft head end 1 and the shaft tail end 11.
Referring to fig. 4, 5 and 6, an axial oil inlet blind hole 4 is formed in the center of the end face of the shaft head end 1, and a first radial through hole 12 communicated with the axial oil inlet blind hole 4 is formed in the outer peripheral surface of the shaft head end 1. The end face of the shaft head end 1 is further provided with a first transition oil hole 13 which is parallel to the shaft axis and extends along the central line of the first connecting rod neck 2, the first transition oil hole 13 is communicated with the first radial through hole 12, the tail end of the first transition oil hole 13 extends into the first main journal 3, and the outer peripheral surface of the first connecting rod neck 2 is provided with a second radial through hole 15 which is communicated with the first transition oil hole 13. The outer circumferential surface of the first main journal 3 is provided with a third radial through hole 17 communicated with the first transition oil hole 13, the tail end of the third radial through hole 17 extends to the center of the first main journal 3, and the outer circumferential surface of the first main journal 3 is further provided with a fourth radial through hole 19 communicated with the tail end of the third radial through hole 17.
Referring to fig. 7, the end surface of the first main journal 3 is provided with a second transition oil hole 18 parallel to the axis and extending along the center line of the second connecting journal 4, the second transition oil hole 18 is communicated with a fourth radial through hole 19, the outer circumferential surface of the second connecting journal 4 is provided with a fifth radial through hole 20 communicated with the second transition oil hole 18, the end of the second transition oil hole 18 extends into the second main journal 5, the outer circumferential surface of the second main journal 5 is provided with a sixth radial through hole 21 communicated with the second transition oil hole 18, the end of the sixth radial through hole 21 extends to the center of the second main journal 5, and the outer circumferential surface of the second main journal 5 is further provided with a seventh radial through hole 36 communicated with the end of the sixth radial through hole 21.
The end face of the second main journal 5 is provided with a third transition oil hole 22 parallel to the axis and extending along the center line of the third connecting journal 6, the third transition oil hole 22 is communicated with a seventh radial through hole 36, the outer circumferential surface of the third connecting journal 6 is provided with an eighth radial through hole 23 communicated with the third transition oil hole 22, the tail end of the third transition oil hole 22 extends into the third main journal 7, the outer circumferential surface of the third main journal 7 is provided with a ninth radial through hole 24 communicated with the third transition oil hole 22, the tail end of the ninth radial through hole 24 extends to the center of the third main journal 7, and the outer circumferential surface of the third main journal 7 is additionally provided with a tenth radial through hole 25 communicated with the tail end of the ninth radial through hole 24.
The end face of the third main journal 7 is provided with a fourth transition oil hole 26 parallel to the axis and extending along the center line of the fourth connecting rod journal 8, the fourth transition oil hole 26 is communicated with a tenth radial through hole 25, the outer circumferential surface of the fourth connecting rod journal 8 is provided with an eleventh radial through hole 27 communicated with the fourth transition oil hole 26, the tail end of the fourth transition oil hole 26 extends into the fourth main journal 9, the outer circumferential surface of the fourth main journal 9 is provided with a twelfth radial through hole 29 communicated with the fourth transition oil hole 26, the tail end of the twelfth radial through hole 29 extends to the center of the fourth main journal 9, and the outer circumferential surface of the fourth main journal 9 is further provided with a thirteenth radial through hole 37 communicated with the tail end of the twelfth radial through hole 29.
The end face of the shaft tail end 11 is provided with a fifth transition oil hole 28 which is parallel to the axis and extends along the center line of the fifth connecting rod neck 10, the fifth transition oil hole 28 is communicated with a thirteenth radial through hole 37, the outer peripheral surface of the fifth connecting rod neck 10 is provided with a fourteenth radial through hole 30 communicated with the fifth transition oil hole 28, the center of the end face of the shaft tail end 11 is provided with an axial oil outlet blind hole 32, and the outer peripheral surface of the shaft tail end 11 is provided with a fifteenth radial through hole 31 communicated with the fifth transition oil hole 28 and the axial oil outlet blind hole 32.
In this embodiment, the end surface of the shaft head end 1 is provided with a first operation avoidance hole 16 and a second operation avoidance hole 33 corresponding to the second transition oil hole 18 and the third transition oil hole 22, the end surface of the first main journal 3 is provided with a third operation avoidance hole 35 corresponding to the third transition oil hole 22, and the end surface of the shaft tail end 11 is provided with a fourth operation avoidance hole 34 corresponding to the fourth transition oil hole 26. The first transition oil hole 13 on the end surface of the head end 1, the end of the fifth transition oil hole 28 on the end surface of the tail end 11, and the outer ends of the radial through holes on the outer circumferential surface of the main journals are sealed by oil seals or tapped for mounting other parts such as a ball and socket valve.
Working principle:
when the lubricating oil pump is used, lubricating oil with certain pressure enters the through oil passage hole structure formed by the axial oil inlet blind hole 14 of the shaft head end 1 and flows out of the axial oil outlet blind hole 32 of the shaft tail end 11, and the lubricating oil is fed into each radial through hole of each connecting rod neck in the flowing process of the through oil passage hole structure, so that the lubricating oil pump plays roles of lubricating, cooling and the like.
The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to fall within the scope of the present utility model.
Claims (4)
1. The utility model provides a bent axle with link-type oil duct hole, includes axle head end, axle tail end, a plurality of main shaft neck and a plurality of connecting rod neck, the axial lead coincidence of axle head end, axle tail end and main shaft neck, each connecting rod neck is around axial lead evenly distributed, its characterized in that: the center of the end face of the shaft head end is provided with an axial oil inlet blind hole, the outer peripheral surface of the shaft head end is provided with a first radial through hole communicated with the axial oil inlet blind hole, the end face of the shaft head end is additionally provided with a first transition oil hole which is parallel to the axis and extends along the center line of a first connecting rod neck, the first transition oil hole is communicated with the first radial through hole, the tail end of the first transition oil hole extends into a first main journal, and the outer peripheral surface of the first connecting rod neck is provided with a second radial through hole communicated with the first transition oil hole; the outer circumferential surface of the first main journal is provided with a third radial through hole communicated with the first transition oil hole, the tail end of the third radial through hole extends to the center of the first main journal, and the outer circumferential surface of the first main journal is additionally provided with a fourth radial through hole communicated with the tail end of the third radial through hole;
the end face of the first main journal is provided with a second transition oil hole which is parallel to the axis and extends along the center line of the second connecting rod journal, the second transition oil hole is communicated with a fourth radial through hole, the outer circumferential surface of the second connecting rod journal is provided with a fifth radial through hole communicated with the second transition oil hole, the tail end of the second transition oil hole extends into the second main journal, the outer circumferential surface of the second main journal is provided with a sixth radial through hole communicated with the second transition oil hole, the tail end of the sixth radial through hole extends to the center of the second main journal, and the outer circumferential surface of the second main journal is additionally provided with a seventh radial through hole communicated with the tail end of the sixth radial through hole;
the end face of the second main journal is provided with a third transition oil hole which is parallel to the axial lead and extends along the central line of the third connecting rod journal, the third transition oil hole is communicated with a seventh radial through hole, the outer peripheral surface of the third connecting rod journal is provided with an eighth radial through hole communicated with the third transition oil hole, the tail end of the third transition oil hole extends into the third main journal, the outer peripheral surface of the third main journal is provided with a ninth radial through hole communicated with the third transition oil hole, the tail end of the ninth radial through hole extends to the center of the third main journal, and the outer peripheral surface of the third main journal is additionally provided with a tenth radial through hole communicated with the tail end of the ninth radial through hole;
and the like until the last transition oil hole in the last connecting rod neck extends to the end face of the shaft tail end, an axial oil outlet blind hole is formed in the center of the end face of the shaft tail end, and a last radial through hole which is communicated with the last transition oil hole and the axial oil outlet blind hole is formed in the outer peripheral surface of the shaft tail end.
2. The crankshaft having a through-type oil passage hole according to claim 1, wherein: the distance from the center line of the connecting rod neck to the axis is smaller than the diameters of the shaft head end and the shaft tail end, a first operation avoidance hole and a second operation avoidance hole corresponding to the second transition oil hole and the third transition oil hole are formed in the end face of the shaft head end, a third operation avoidance hole corresponding to the third transition oil hole is formed in the end face of the first main journal, and a fourth operation avoidance hole corresponding to the penultimate transition oil hole is formed in the end face of the shaft tail end.
3. The crankshaft having a through-type oil passage hole according to claim 1, wherein: the first transition oil hole on the end face of the shaft head end starts, the tail end of the last transition oil hole on the end face of the shaft tail end and the outer end of each radial through hole on the outer peripheral surface of each main journal are plugged or provided with other parts.
4. The crankshaft having a through-type oil passage hole according to claim 1, wherein: the number of the main journals is four, the number of the connecting rod journals is five, the first connecting rod journal is positioned between the first main journal and the shaft head end, the last connecting rod journal is positioned between the last main journal and the shaft tail end, and the phase included angle of two adjacent connecting rod journals is 72 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320825969.7U CN219623063U (en) | 2023-04-14 | 2023-04-14 | Crankshaft with through type oil duct hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320825969.7U CN219623063U (en) | 2023-04-14 | 2023-04-14 | Crankshaft with through type oil duct hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219623063U true CN219623063U (en) | 2023-09-01 |
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ID=87793973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320825969.7U Active CN219623063U (en) | 2023-04-14 | 2023-04-14 | Crankshaft with through type oil duct hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219623063U (en) |
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2023
- 2023-04-14 CN CN202320825969.7U patent/CN219623063U/en active Active
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