An engine

Abstract

The present application relates to a vertical engine, in particular to an engine, comprising a crankcase, a vertical crankshaft is installed in the crankcase, the vertical crankshaft comprises a main journal and a connecting rod journal, an oil inlet gallery is vertically arranged on the connecting rod journal and has an open upper end, an oil outlet gallery is arranged on the connecting rod journal and extends radially, the oil outlet gallery is communicated with the oil inlet gallery, one end of the oil outlet gallery communicated with the outside of the connecting rod journal is away from the main journal, a plane defined by the main journal axis and the connecting rod journal axis forms an angle H with the center line of the oil outlet gallery, the angle H is between 30° and 60°, and an oil supply member is installed in the crankcase to supply oil to the oil inlet gallery by gravity. The present application solves the problem of poor lubrication of the connecting rod journal under high load in the existing vertical engine using splash lubrication.

Description

TECHNICAL FIELD

[0001] The present application relates to a crankshaft vertical layout engine. BACKGROUND

[0002] The connecting rod mechanism is the main component of the engine to convert energy and realize the working cycle. After the engine crankshaft is subjected to external force, the connecting rod drives the piston to make reciprocating motion to suck in the combustible mixture, and makes the combustible mixture burn in the combustion chamber to do work, and then drives the piston to move to rotate the crankshaft, so that the engine automatically operates and the working cycle automatically runs. As one of the important parts of the engine, the crankshaft bears high speed and periodically changing gas pressure, reciprocating inertia force, centrifugal force, and additional force caused by bending vibration and torsional vibration. Under the condition of high speed and variable load of the engine, the flow of oil is discontinuous, and the oil film at the joint surface between the connecting rod journal and the connecting rod is not easy to form, so higher requirements are put forward for the lubrication at the connecting rod journal.

[0003] The commonly used connecting rod lubrication methods are pressure lubrication and splash lubrication. The pressure lubrication method is to open an outlet oil channel in the circumferential direction of the connecting rod journal and an inclined inlet oil channel at a certain angle in the axial direction, the two oil channels are communicated, the lubricating oil is pressurized and pumped into the inlet oil channel by using an oil pump, and then flows out from the outlet oil channel to the surface of the connecting rod journal, and then forms a lubricating oil film for lubrication. The splash lubrication method is to use the oil stirring teeth to stir the lubricating oil at high speed and splash it on the crankshaft, so that the lubricating oil enters the joint surface between the connecting rod and the connecting rod journal to realize the lubrication of the connecting rod big end bearing.

[0004] However, when the crankshaft is vertically arranged, i.e. the rotation axis of the crankshaft is in a vertical state to form a vertical crankshaft, the pressure lubrication method will cause the structure of the crankshaft to be complex and the cost to be high. Although the splash lubrication method has a simple structure and low cost, it is difficult to effectively lubricate the connecting rod journal when the crankshaft bears high load, so the splash lubrication method is only used in engines with small load on the crankshaft. SUMMARY

[0005] The purpose of the present application is to provide an engine to solve the problem of poor lubrication at the connecting rod journal under high load when the existing vertical engine uses splash lubrication.

[0006] In order to achieve the above object, the basic scheme of the present application provides an engine, comprising a crankcase, a vertical crankshaft vertically arranged in the crankcase, the vertical crankshaft comprising a main shaft journal and a connecting rod shaft journal, an oil inlet gallery vertically arranged on the connecting rod shaft journal and having an open upper end, an oil outlet gallery radially extending on the connecting rod shaft journal and communicating with the oil inlet gallery, one end of the oil outlet gallery communicating with the outside of the connecting rod shaft journal being directed away from the main shaft journal, and a plane defined by the main shaft journal axis and the connecting rod shaft journal axis forming an angle H with the center line of the oil outlet gallery, the angle H being between 30° and 60°, and an oil supply member for supplying oil to the oil inlet gallery by gravity being arranged in the crankcase.

[0007] The basic scheme has the beneficial effect that, with the arrangement, the oil supply member causes the lubricating oil in the crankcase to enter the oil inlet gallery under the action of gravity, and then the lubricating oil enters the oil outlet gallery under the action of centrifugal force and flows to the outside of the connecting rod shaft journal through the oil outlet gallery, thereby forming a lubricating oil film at the joint surface between the connecting rod shaft journal and the connecting rod and improving the wear condition of the connecting rod shaft journal. Compared with the pressure lubrication mode, the present scheme, through the cooperation of the oil supply member for supplying oil by gravity and the oil inlet gallery and the oil outlet gallery, greatly reduces the machining cost of the vertical crankshaft while ensuring the lubrication effect.

[0008] Further, the oil supply member is a stirring member for splash lubrication of the vertical crankshaft. With this arrangement, the connecting rod shaft journal of the vertical crankshaft can be well lubricated even in the case of splash lubrication, which is conducive to further simplifying the design and machining of the lubrication structure of the entire crankcase and thus reducing the cost.

[0009] In order to further improve the lubrication effect at the connecting rod shaft journal, the angle H is between 30° and 35°.

[0010] Further, the oil inlet gallery comprises a storage section and an opening section, the opening section being located above the oil outlet gallery and the storage section being located below the oil outlet gallery. With this arrangement, impurities in the lubricating oil are deposited at the bottom of the storage section under the action of gravity, so that the impurities are separated from the lubricating oil, thereby further improving the lubrication effect.

[0011] In order to further improve the lubrication effect at the connecting rod shaft journal, the ratio between the length of the storage section and the length of the opening section is between 0.1 and 0.75.

[0012] In order to further improve the lubrication effect at the connecting rod shaft journal, the ratio between the maximum cross-sectional width of the oil inlet gallery and the diameter of the connecting rod shaft journal is between 0.1 and 0.5.

[0013] To further improve the lubrication effect at the connecting rod journal, the ratio between the maximum cross-sectional width of the oil outlet passage and the length of the connecting rod journal is between 0.1 and 0.5.

[0014] To further improve the lubrication effect at the connecting rod journal, the oil inlet passage is coaxially arranged with the connecting rod journal. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an engine embodiment of the present invention;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure of a vertical crankshaft;

[0017] Figure 3 for Figure 2 AA sectional view. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method:

[0019] The reference numerals in the accompanying drawings include: vertical crankshaft 1, main journal 11, connecting rod journal 12, oil inlet passage 121, opening section 1211, storage section 1212, oil outlet passage 122, crankcase 2, oil stirring gear 3, and connecting rod 4.

[0020] The basic implementation examples are as follows: Figure 1 , Figure 2 and Figure 3 As shown: An engine includes a crankcase 2, a piston that slides laterally on the cylinder head portion of the crankcase 2, and a vertically arranged crankshaft 1 installed inside the crankcase 2. The piston and the vertical crankshaft 1 are connected by a connecting rod 4. The vertical crankshaft includes a main journal 11 and a connecting rod journal 12. The connecting rod journal 12 has an oil inlet passage 121 with an open upper end, which is preferably coaxial with the connecting rod journal 12 in this embodiment. The connecting rod journal 12 also has a radially extending oil outlet passage 122, which communicates with the oil inlet passage 121, so that the lubricating oil in the oil inlet passage 121 flows through the oil outlet passage 122 to the circumferential outer side of the connecting rod journal 12, lubricating the mating surface between the connecting rod journal 12 and the connecting rod.

[0021] The end of the oil outlet passage 122, which communicates with the outside of the connecting rod journal 12, is located on the side of the connecting rod journal 12, which is away from the main journal 11, and the angle H between the center line of the oil outlet passage 122 and the plane defined by the axes of the main journal 11 and the connecting rod journal 12 is preferably 30° in the present embodiment, although it can be any value between 30° and 60°. The ratio of the maximum cross-sectional width of the oil outlet passage 122 to the length L of the connecting rod journal 12 is preferably 0.2, although it can be any value between 0.1 and 0.5. The cross section of the oil outlet passage 122 is preferably circular in the present embodiment.

[0022] The oil inlet passage 121 includes a storage section 1212 and an open section 1211. The open section 1211 is the section of the oil inlet passage 121 from the upper end thereof to the position where it communicates with the oil outlet passage 122, and the storage section 1212 is the blind hole-like section of the oil inlet passage 121 from the position where it communicates with the oil outlet passage 122 to the bottom of the oil inlet passage 121. The ratio of the length of the storage section 1212 to the length of the open section 1211 is preferably 0.75 in the present embodiment, although it can be any value between 0.1 and 0.75. The ratio of the maximum cross-sectional width of the oil inlet passage 121 to the diameter of the connecting rod journal 12 is preferably 0.2, although it can be any value between 0.1 and 0.5. The cross section of the oil inlet passage 121 is preferably circular in the present embodiment.

[0023] The oil supply member for supplying the oil inlet passage 121 with oil by gravity is installed in the crankcase. In the present embodiment, the oil supply member is a stirring member for splash lubrication of the upright crankshaft, such as a stirring tooth 3 that is linked to the upright crankshaft. The stirring tooth 3 is rotated by the rotation of the upright crankshaft 1 to splash the lubricating oil in the crankcase 2 against the upright crankshaft 1, and the splashed lubricating oil is supplied to the oil inlet passage 121. Of course, another method of splash lubrication can be used to supply the oil inlet passage 121 with lubricating oil.

[0024] The operation of the present embodiment is as follows. When the upright crankshaft 1 is rotated, the stirring tooth 3 is rotated to splash the lubricating oil against the connecting rod journal 12 of the upright crankshaft 1. The splashed lubricating oil is supplied to the oil inlet passage 121 from the upper end opening of the oil inlet passage 121. The impurities in the lubricating oil are deposited at the bottom of the storage section 1212 by gravity. The lubricating oil is supplied to the joint between the connecting rod journal 12 and the connecting rod by the oil outlet passage 122 by centrifugal force.

[0025] The above-mentioned are only embodiments of the present application, and the common knowledge of specific structures and characteristics in the scheme is not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be considered as the protection scope of the present application, and these will not affect the effect and practicality of the patent.

Claims

1. An engine comprising a crankcase, wherein a vertically arranged crankshaft is mounted within the crankcase, the vertical crankshaft including a main journal and a connecting rod journal, the connecting rod journal having a vertically arranged oil inlet passage with an open upper end, and the connecting rod journal having a radially extending oil outlet passage communicating with the oil inlet passage, characterized in that: The end of the oil outlet passage that connects to the outside of the connecting rod journal faces the side of the connecting rod journal away from the main journal, and the plane defined by the axis of the main journal and the axis of the connecting rod journal together forms an angle H with the center line of the oil outlet passage, the angle H being between 30° and 60°; the crankcase is equipped with an oil supply component that provides gravity-type oil supply to the oil inlet passage. The oil inlet passage includes a storage section and an opening section. The opening section is located above the oil outlet passage, and the storage section is located below the oil outlet passage.

2. The engine according to claim 1, characterized in that: The oil supply component is an oil stirring component that performs splash lubrication on a vertical crankshaft.

3. The engine according to claim 2, characterized in that: The included angle H is between 30° and 35°.

4. The engine according to claim 3, characterized in that: The ratio between the length of the storage section and the length of the opening section is between 0.1 and 0.

75.

5. The engine according to claim 4, characterized in that: The ratio between the maximum cross-sectional width of the oil inlet passage and the diameter of the connecting rod journal is between 0.1 and 0.

5.

6. The engine according to claim 5, characterized in that: The ratio between the maximum cross-sectional width of the oil outlet passage and the length of the connecting rod journal is between 0.1 and 0.

5.

7. The engine according to claim 6, characterized in that: The oil inlet passage is coaxially arranged with the connecting rod journal.

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