CN210460788U - Lubricating structure of crankshaft - Google Patents

Lubricating structure of crankshaft Download PDF

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Publication number
CN210460788U
CN210460788U CN201921396388.6U CN201921396388U CN210460788U CN 210460788 U CN210460788 U CN 210460788U CN 201921396388 U CN201921396388 U CN 201921396388U CN 210460788 U CN210460788 U CN 210460788U
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China
Prior art keywords
oil duct
crank
oil
crankshaft
communicated
Prior art date
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Active
Application number
CN201921396388.6U
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Chinese (zh)
Inventor
李继才
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Jinan Jiedi Locomotive Technology Co Ltd
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Jinan Jiedi Locomotive Technology Co Ltd
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Priority to CN201921396388.6U priority Critical patent/CN210460788U/en
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Abstract

An object of the utility model is to provide a lubricating structure of bent axle for solve lubricated technical problem. A lubricating structure of a crankshaft is characterized in that the axial middle part of a right crank is a hollow oil duct, and the hollow oil duct is communicated with an oil duct of a crank pin through an inclined oil duct; the middle part of the left crank is provided with an oil duct I which is communicated with the hollow oil duct; an oil duct II is arranged at the matching part of the left crank and the electric starting gear, and the oil duct II is communicated with the oil duct I.

Description

Lubricating structure of crankshaft
Technical Field
The utility model belongs to the technical field of the lubricated technique of bent axle and specifically relates to a lubricating structure of bent axle.
Background
At present, the crank lubrication of an engine for a straddle motorcycle is generally performed by oil from an oil pump. Namely, the oil flows into the inclined oil hole through the oil passage at the end part of the right crank, then flows into the crank pin hole, and then lubricates the connecting rod bearing.
The crankshaft lubrication structure in the prior art is limited to lubricating a connecting rod bearing. The electric starting gear bearing on the left crank is not lubricated by special oil ducts for conveying engine oil, but is lubricated by a small part of engine oil thrown out when the electric starting gear operates, so that the electric starting gear bearing is easy to cause large electric starting noise, incomplete lubrication and early damage.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lubricating structure of bent axle for solve lubricated technical problem.
The utility model provides a technical scheme that its technical problem adopted is:
a lubricating structure of a crankshaft is characterized in that the axial middle part of a right crank is a hollow oil duct, and the hollow oil duct is communicated with an oil duct of a crank pin through an inclined oil duct; the middle part of the left crank is provided with an oil duct I which is communicated with the hollow oil duct; an oil duct II is arranged at the matching part of the left crank and the electric starting gear, and the oil duct II is communicated with the oil duct I.
Preferably, the end of the crank pin is provided with a plug.
Preferably, the oil passage I is communicated with the hollow oil passage through an oil injection hole.
Preferably, the outer diameter of the crank pin is in interference fit with the left crank and the right crank respectively.
Preferably, the plug is in interference fit with the crank pin.
The effects provided in the contents of the present invention are only the effects of the embodiments, not all the effects of the present invention, and the above technical solutions have the following advantages or beneficial effects:
1. the utility model discloses utilize and increase a nozzle opening at right crank tip, increase the mode of oil duct on left crank, realized the lubrication of electric starting gear bearing. An oil duct I and an oil duct II are respectively arranged at the middle part and the shaft diameter of the left crank and communicated, and the oil injection hole on the right crank divides a small part of high-pressure engine oil from the engine oil pump and injects the oil into the oil duct I and the oil duct II of the left crank, so that the electric starting gear bearing is lubricated.
2. The structure is simple, the lubrication of the bearing can be realized without adding any part, the electric starting noise is reduced, and the service life of the bearing is prolonged.
Drawings
FIG. 1 is a sectional view of the structure of the present invention;
in the figure: 1. a left crank; 2. an electric start gear bearing; 3. an electric starting gear; 4. a connecting rod bearing; 5. a connecting rod; 6. a crank pin; 7. a plug; 8. a right crank; 9. a hollow oil passage; 10. an inclined oil duct; 11. an oil spray hole; 12. an oil duct I; 13. and an oil duct II.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and techniques are omitted so as to not unnecessarily limit the invention.
As shown in fig. 1, a lubricating structure of a crankshaft comprises a left crank 1, an electric starting gear bearing, an electric starting gear 3, a connecting rod bearing 4, a connecting rod 5, a crank pin 6, a plug 7, a right crank 8, an oil injection hole 11, an oil passage i 12 and an oil passage ii 13. The inner diameter and the outer diameter of the electric starting gear bearing are in clearance fit with the shaft diameter of the left crank 1 and the inner diameter of the electric starting gear 3 respectively; the outer diameter of the crank pin 6 is in interference fit with the left crank 1 and the right crank 8 respectively; the inner and outer diameters of the connecting rod bearing 4 are in clearance fit with the crank pin 6 and the connecting rod 5 respectively; the plug 7 is in interference fit with the crank pin 6; the end surfaces of the connecting rod 5 and the connecting rod bearing 4 are in clearance fit with the end surfaces of the left crank 1 and the right crank 8 respectively.
The axial middle part of the right crank 8 is designed into a hollow oil duct 9 and an inclined oil duct 10, and high-pressure engine oil from the engine oil pump flows into the oil duct of the crank pin 6 through the hollow oil duct 9 of the right crank 8 and the inclined oil duct 10. The end of the crank pin 6 is provided with a plug 7, and the high-pressure engine oil flows out to the connecting rod bearing 4 to fully lubricate the connecting rod bearing 4. The other end of the right crank 8 is provided with an oil spray hole 11, the middle part of the left crank 1 is provided with an oil duct I12, and the oil duct I12 is communicated with the hollow oil duct 9 through the oil spray hole 11. An oil duct II 13 is arranged at the matching part of the left crank shaft 1 and the electric starting gear 3, and the oil duct II 13 is communicated with the oil duct I12. High-pressure engine oil is sprayed out through an oil spraying hole 11 of the right crank 8, and a part of engine oil is sprayed into an oil duct I12 and then flows into an oil duct II 13 to lubricate an electric starting gear bearing.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
Although the specific embodiments of the present invention have been described with reference to the drawings, the present invention is not limited thereto, and various modifications or variations that can be made by those skilled in the art without inventive labor are still within the scope of the present invention.

Claims (5)

1. A lubricating structure of a crankshaft is characterized in that the axial middle part of a right crank is a hollow oil duct, and the hollow oil duct is communicated with an oil duct of a crank pin through an inclined oil duct; the crank is characterized in that an oil duct I is arranged in the middle of the left crank and is communicated with the hollow oil duct; an oil duct II is arranged at the matching part of the left crank and the electric starting gear, and the oil duct II is communicated with the oil duct I.
2. A lubricating structure of a crankshaft as claimed in claim 1, wherein a plug is provided at an end of the crank pin.
3. The lubrication structure of a crankshaft as claimed in claim 1, wherein said oil passage i communicates with said hollow oil passage through an oil injection hole.
4. A lubricating structure of a crankshaft as claimed in claim 1, wherein the crank pin has an outer diameter interference-fitted to the left crank and the right crank, respectively.
5. A lubricating structure for a crankshaft as claimed in claim 2, wherein the plug is in interference fit with the crank pin.
CN201921396388.6U 2019-08-26 2019-08-26 Lubricating structure of crankshaft Active CN210460788U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921396388.6U CN210460788U (en) 2019-08-26 2019-08-26 Lubricating structure of crankshaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921396388.6U CN210460788U (en) 2019-08-26 2019-08-26 Lubricating structure of crankshaft

Publications (1)

Publication Number Publication Date
CN210460788U true CN210460788U (en) 2020-05-05

Family

ID=70430959

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921396388.6U Active CN210460788U (en) 2019-08-26 2019-08-26 Lubricating structure of crankshaft

Country Status (1)

Country Link
CN (1) CN210460788U (en)

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