CN217682773U - Lightweight crankshaft - Google Patents
Lightweight crankshaft Download PDFInfo
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- CN217682773U CN217682773U CN202221739992.6U CN202221739992U CN217682773U CN 217682773 U CN217682773 U CN 217682773U CN 202221739992 U CN202221739992 U CN 202221739992U CN 217682773 U CN217682773 U CN 217682773U
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- connecting rod
- journal
- main
- cylinder
- lubricating oil
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Abstract
The utility model discloses a lightweight crankshaft, which comprises a crankshaft body with a main journal and a plurality of connecting rod journals, a lubricating oil hole, a lubricating oil channel, a main shaft cylinder and a connecting rod cylinder; the axial lead of the main journal is parallel to but not coaxial with the axial leads of the plurality of connecting rod journals; the lubricating oil holes are formed in the main journal and the connecting rod journal, and at least one oil port of each lubricating oil hole is exposed on the axial surface of each of the main journal and the connecting rod journal; the lubricating oil channel is communicated between the adjacent lubricating oil holes on the main journal and the connecting rod journal; the main shaft cylinder is embedded in a central shaft hole of the main journal; the connecting rod cylinder is embedded in a central shaft hole of the connecting rod neck. The utility model discloses a lightweight bent axle can reach the purpose for main shaft weight reduction through the hollow department that adopts light material's cylinder embedding main shaft journal and connecting rod neck.
Description
Technical Field
The utility model relates to a piston internal-combustion engine field especially relates to a lightweight bent axle suitable for piston internal-combustion engine.
Background
Piston internal combustion engines typically have a crank mechanism, comprising a crankshaft, a connecting rod and a piston, by means of which the combustion energy is converted from linear motion to rotary motion, outputting torque.
The crankshaft of a reciprocating internal combustion engine is a critical part of the engine, which requires sufficient strength for safety. At present, the engine is generally obtained by forging steel or casting ductile iron, wherein the former is used for a large-load engine, and the latter is used for a low-load engine. The design safety factor is high, and the material density is big, so the bent axle is generally very heavy, and is great to the whole lightweight influence of engine.
Because the crankshaft is often a spatial structure, and the journal is generally provided with an oil through hole for lubricating the bearing, so that the lubricating oil reaches the main journal from an oil outlet hole on the crankshaft mounting seat for lubrication, and then reaches the connecting rod journal through the oil hole for lubrication, all the journals are generally solid, and the purpose of removing the weight by removing the material in the journals is difficult to achieve, as shown in fig. 1 to 2. When a hollow shaft is used for removing the weight, the shaft neck is usually in a hollow structure, and a steel pipe is driven into the hollow structure to serve as an oil through hole. The same oil through hole diameter needs to bore bigger bottom outlet, can reduce the bearing area of axle bush, reduces the reliability of axle bush. As shown in fig. 3-4.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lightweight bent axle, its hollow department through the cylinder embedding main shaft neck that adopts light materials and connecting rod neck can reach the purpose for main shaft weight reduction.
In order to achieve the above object, the present invention provides a lightweight crankshaft, which comprises a crankshaft body having a main journal and a plurality of connecting journals, a lubrication oil hole, a lubrication oil passage, a main shaft cylinder and a connecting rod cylinder; the axial lead of the main journal is parallel to but not coaxial with the axial leads of the plurality of connecting rod journals; the lubricating oil holes are formed in the main journal and the connecting rod journal, and at least one oil port of each lubricating oil hole is exposed on the axial surface of each of the main journal and the connecting rod journal; the lubricating oil channel is communicated between the adjacent lubricating oil holes on the main journal and the connecting rod journal; the main shaft cylinder is embedded in a central shaft hole of the main journal; the connecting rod cylinder is embedded in a central shaft hole of the connecting rod neck.
In some embodiments, the main shaft cylinder and the main journal and the connecting rod cylinder and the connecting rod journal are connected by interference fit.
In some embodiments, the interference fit connection between the main shaft cylinder and the central bore of the main journal and the interference fit connection between the connecting rod cylinder and the central bore of the connecting rod journal are a press fit connection, a hot fit connection, or a cold fit connection.
In some embodiments, the spindle cylinder and the connecting rod cylinder are both made of lightweight materials.
In some embodiments, the lightweight material comprises an aluminum alloy or a titanium alloy.
In some embodiments, a lubrication hole or a lubrication channel passes through the interference fit between the main shaft cylinder and the central shaft hole of the main journal and between the connecting rod cylinder and the central shaft hole of the connecting rod journal.
In some embodiments, the interference between the main shaft cylinder and the central shaft hole of the main journal and between the connecting rod cylinder and the central shaft hole of the connecting rod journal and the roughness of the interference fit surface can satisfy that the lubricating oil does not leak from the interference fit surface.
In some embodiments, the diameter of the spindle cylinder is the same or different than the diameter of the connecting rod cylinder.
Compared with the prior art, the utility model discloses a lightweight bent axle has following beneficial effect: this application is through adopting the mode of processing, all bore empty to main journal and connecting rod neck center, simultaneously, just in addition with light material such as aluminum alloy, titanium alloy etc. process into with drilling assorted cylindricality, just use the process of interference fit tolerance and pressure equipment or difference in temperature pressure equipment, install the cylindricality into crankshaft journal drilling to the cylindricality, then process the oil through like solid crankshaft, the oil through passes through crankshaft journal and cylindricality, and through the interference magnitude that needs control cylindricality and the roughness of fitting surface of driling, in order to guarantee that lubricating oil can not leak along the cooperation face of cylinder, the normal lubricating function of bent axle has been satisfied promptly, reached again and lightened the purpose for bent axle itself, and manufacturing and processing is simple, maneuverability is strong, be suitable for the popularization.
Drawings
FIG. 1 is a schematic structural view of a crankshaft according to an embodiment of the prior art;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic structural view of a crankshaft according to another embodiment of the prior art;
FIG. 4 is a schematic cross-sectional view taken at B-B of FIG. 3;
fig. 5 is a schematic structural view of a lightweight crankshaft according to an embodiment of the present invention;
fig. 6 is a schematic sectional view at C-C of fig. 5.
Description of the main reference numerals:
10-crankshaft body, 101-main journal, 102-connecting rod journal, 103-lubricating oil hole, 104-lubricating oil channel, 105-main shaft cylinder and 106-connecting rod cylinder.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 5 to 6, a lightweight crankshaft according to a preferred embodiment of the present invention includes a crankshaft body 10 having a main journal 101 and a plurality of connecting journals 102, a lubricating oil hole 103, a lubricating oil gallery 104, a main shaft cylinder 105, and a connecting rod cylinder 106. The axes of the main journals 101 are parallel to but not coaxial with the axes of the plurality of journals 102, and the axes of the plurality of journals 102 are parallel to but not coaxial with each other. The lubricating oil holes 103 are formed in the main journal 101 and the connecting journal 104, and at least one oil port of the lubricating oil hole 103 is exposed on each of the axial surfaces of the main journal 101 and the connecting journal 102. The lubricating oil passage 104 communicates between the adjacent lubricating oil holes 103 in the main journal 101 and the connecting journal 102. The main shaft cylinder 105 is fitted in the central axial hole of the main journal 101. The connecting rod cylinder 106 is inserted into the central axial hole of the connecting rod neck 102.
Referring to fig. 5 to 6, in some embodiments, the main shaft cylinder 105 and the main journal 101 and the connecting rod cylinder 106 and the connecting rod journal 102 are connected by interference fit. The interference fit connection between the main shaft cylinder 105 and the central shaft hole of the main journal 101 and the interference fit connection between the connecting rod cylinder 106 and the central shaft hole of the connecting rod journal 102 are press-fitting connection or temperature difference press-fitting connection, such as hot-fitting connection or cold-fitting connection. The spindle cylinder 105 and the link cylinder 106 are both made of a lightweight material. The lightweight material may be, but is not limited to, including aluminum alloys or titanium alloys, and the like.
Referring to fig. 5 to 6, in some embodiments, the oil hole 103 and the oil passage 104 may be machined by a machining method or process of a solid shaft, and the oil hole 103 and the oil passage 104 generally pass through an interference fit surface between the main shaft cylinder 105 and a central shaft hole of the main journal 101 and pass through an interference fit surface between the connecting rod cylinder 106 and a central shaft hole of the connecting rod journal 102. Therefore, the interference between the main shaft cylinder 105 and the central shaft hole of the main journal 101 and between the connecting rod cylinder 106 and the central shaft hole of the connecting rod journal 102 and the roughness of the interference fit faces should be ensured to be sufficient for the lubricating oil not to leak from the interference fit faces.
In some embodiments, the lubricating oil hole 103 and the lubricating oil passage 104 may be overlapped, that is, a hole is directly drilled from the axial surface of the main journal to the axial surface of the adjacent journal during the machining, and one oil port is exposed on the axial surface of the main journal and the axial surface of the journal respectively, which is relatively simple, but is more easily limited by the structural size of the crankshaft body.
In some embodiments, the diameter of the spindle cylinder 105 and the diameter of the connecting rod cylinder 106 may be selected to be the same or different.
In some embodiments, the solid, hollow or light-weight-filled cylinders of the main journals 101, connecting journals 102 may be implemented in combination. For example, but not limited to, the main journal 101 is solid, the connecting journal 102 is filled with a cylinder of light material, and the lubricating oil hole 103 and the lubricating oil passage 104 are machined by a common machining method, or conversely, the connecting journal 102 is solid and the main journal 101 is filled with a cylinder of light material. Or the main journal 101 is filled with a solid or light cylinder, the connecting rod journal 102 is hollow, and the lubricating oil channel 104 and the lubricating oil hole 103 of the connecting rod journal 102 are processed by driving steel pipes. In summary, the principle can be combined according to the actual requirements, in short, the weight of the crankshaft body 10 can be reduced as much as possible while satisfying the strength, rigidity and lubrication.
To sum up, the utility model discloses a lightweight bent axle has following advantage: this application is through adopting the mode of processing, all bore empty to main journal and connecting rod neck center, simultaneously, just in addition with light material such as aluminum alloy, titanium alloy etc. process into with drilling assorted cylindricality, just use the process of interference fit tolerance and pressure equipment or difference in temperature pressure equipment, install the cylindricality into crankshaft journal drilling to the cylindricality, then process the oil through like solid crankshaft, the oil through passes through crankshaft journal and cylindricality, and through the interference magnitude that needs control cylindricality and the roughness of fitting surface of driling, in order to guarantee that lubricating oil can not leak along the cooperation face of cylinder, the normal lubricating function of bent axle has been satisfied promptly, reached again and lightened the purpose for bent axle itself, and manufacturing and processing is simple, maneuverability is strong, be suitable for the popularization.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (8)
1. A lightweight crankshaft, comprising:
the crankshaft body comprises a main journal and a plurality of connecting rod journals, and the axial lines of the main journal and the connecting rod journals are parallel but not coaxial;
the lubricating oil holes are formed in the main journal and the connecting rod journal, and at least one oil port of each lubricating oil hole is exposed on the axial surface of each of the main journal and the connecting rod journal;
the lubricating oil channel is communicated between the adjacent main journal and the lubricating oil hole on the connecting rod journal;
the main shaft cylinder is embedded in a central shaft hole of the main journal; and
and the connecting rod cylinder is embedded in the central shaft hole of the connecting rod neck.
2. The lightweight crankshaft of claim 1, wherein the main shaft cylinder and the central axial bore of the main journal and the connecting rod cylinder and the central axial bore of the connecting rod journal are connected by interference fit.
3. The lightweight crankshaft of claim 2, wherein the interference fit connections between said main shaft cylinder and said central axial bore of said main journal and between said connecting rod cylinder and said central axial bore of said connecting rod journal are press fit connections, hot fit connections, or cold fit connections.
4. The lightweight crankshaft of claim 1, wherein said main shaft cylinder and said connecting rod cylinder are both made of lightweight material.
5. The lightweight crankshaft of claim 4, wherein said lightweight material includes an aluminum alloy or a titanium alloy.
6. The lightweight crankshaft of claim 2, wherein the lubrication hole or the lubrication passage passes through interference fit faces between the main shaft cylinder and the central shaft hole of the main journal and between the connecting rod cylinder and the central shaft hole of the connecting rod journal.
7. The lightweight crankshaft according to claim 6, wherein interference between the main shaft cylinder and the central axial hole of the main journal and between the connecting rod cylinder and the central axial hole of the connecting rod journal and a roughness of the interference fit surface are such that lubricating oil does not leak from the interference fit surface.
8. The lightweight crankshaft of claim 1, wherein a diameter of said main shaft cylinder is the same as or different from a diameter of said connecting rod cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221739992.6U CN217682773U (en) | 2022-07-07 | 2022-07-07 | Lightweight crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221739992.6U CN217682773U (en) | 2022-07-07 | 2022-07-07 | Lightweight crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217682773U true CN217682773U (en) | 2022-10-28 |
Family
ID=83715226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221739992.6U Active CN217682773U (en) | 2022-07-07 | 2022-07-07 | Lightweight crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217682773U (en) |
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2022
- 2022-07-07 CN CN202221739992.6U patent/CN217682773U/en active Active
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