An internal lubrication and cooling structure for a gasoline engine

Abstract

This invention discloses an internal lubrication and cooling structure for a gasoline engine, comprising a crankshaft body rotatably fixed within the engine cavity. The crankshaft body includes an eccentrically connected crankshaft fan plate and a crankshaft crank, which rotate coaxially with the crankshaft body. One end of the crankshaft fan plate is fan-shaped with the rotation axis as its center, and the other end extends outward from the rotation axis and connects to the crankshaft crank. An arc-shaped fan plate stop is provided within the engine cavity, located below the crankshaft fan plate, with both centers coaxial. One end of the crankshaft crank is connected to a connecting rod, and the other end of the connecting rod is connected to a piston. By adding a fan plate stop below the crankshaft fan plate, a certain amount of engine oil accumulates on the stop when the gasoline engine is running. When the crankshaft body rotates, it drives the crankshaft fan plate to rotate, pushing the engine oil on the stop to the bottom of the moving piston. This cools and lubricates the piston, improving the piston's stable operating time and extending its service life.

Description

Technical Field

[0001] This invention relates to the field of gasoline engines, and in particular to an internal lubrication and cooling structure for a gasoline engine. Background Technology

[0002] During high-speed operation of a general-purpose small gasoline engine, the rotation of the crankshaft drives the piston to reciprocate within the cylinder. The higher the crankshaft speed, the higher the frequency of the piston's reciprocating motion. Due to the relative movement between the piston and the cylinder liner, the surface temperature of the piston components also rises sharply. This results in two consequences: firstly, localized deformation of the piston; and secondly, reduced performance of the piston rings. Therefore, insufficient piston cooling and lubrication are common problems in general-purpose small gasoline engines currently on the market. Summary of the Invention

[0003] The purpose of this invention is to address the problem in the prior art that pistons in gasoline engines are prone to local deformation due to insufficient lubrication, and to provide an internal lubrication and cooling structure for gasoline engines that can provide more lubricating oil to the pistons.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] An internal lubrication and cooling structure for a gasoline engine includes a crankshaft body rotatably fixed in the engine cavity. The crankshaft body includes an eccentrically connected crankshaft fan plate and a crank crank. The crankshaft fan plate rotates coaxially with the crankshaft body. One end of the crankshaft fan plate is fan-shaped with the rotation axis as its center, and the other end extends outward from the rotation axis and is connected to the crank crank. An arc-shaped fan plate stop is provided in the engine cavity. The fan plate stop is located below the crankshaft fan plate, and the centers of the two are coaxial. One end of the crank crank is connected to a connecting rod, and the other end of the connecting rod is connected to a piston.

[0006] In this invention, which employs the above-described technical solution, the crankshaft body is rotatable and connected to a piston via a connecting rod. The piston rotates under the drive of the crankshaft body. Therefore, after adding a fan plate baffle below the crankshaft fan plate, a certain amount of engine oil will accumulate on the fan plate baffle when the gasoline engine is running. When the crankshaft body rotates, it will drive the crankshaft fan plate to rotate. The crankshaft fan plate will push the engine oil on the fan plate baffle to the bottom of the moving piston, which can cool and lubricate the piston, improve the piston's stable running time, and extend the piston's service life.

[0007] Furthermore, the radial clearance between the crankshaft fan plate stop and the crankshaft fan plate is 2.5mm. This appropriate clearance ensures smooth rotation of the crankshaft fan plate and facilitates the fan plate pushing out oil from the stop, thus lubricating the piston.

[0008] Furthermore, the fan-shaped baffle is thin, which helps to reduce weight.

[0009] Furthermore, the thickness of the fan plate baffle is 2mm, and the radius of its arc is 58mm. The specific dimensions of the fan plate baffle can be changed according to the internal structure of the gasoline engine.

[0010] Furthermore, the distance by which the fan plate retainer protrudes along the crankshaft body axial direction is greater than that of the crankshaft fan plate. The increased size of the fan plate retainer increases the oil storage area, facilitating oil retention and enhancing the lubrication and cooling effect on the piston.

[0011] Furthermore, the gasoline engine cavity has a cylinder bore near the crankshaft, and the fan plate baffle has a guide notch on the side near the cylinder bore. The guide notch guides the flow of engine oil.

[0012] Furthermore, an oil baffle is provided next to the crankshaft body, located on the opposite side of the swashplate block. When the piston moves downward, the oil carried out by the piston will be sprayed out from the cylinder bore. When it encounters the oil baffle, the oil can form a fluid and slide down from the top to the connection end between the connecting rod and the crankshaft, thus lubricating the connection between the two.

[0013] Furthermore, the oil baffle extends axially along the crankshaft body. The oil baffle is large enough to provide good oil baffle performance.

[0014] Furthermore, the thickness of the oil baffle gradually decreases along the direction away from the inner wall of the gasoline engine cavity. The cast housing structure is equipped with oil baffles of decreasing thickness, which facilitates demolding while enhancing the structural strength of the oil baffles.

[0015] Furthermore, the length of the oil baffle is 105mm, the thickest part is 5.6mm, and the thinnest part is 2mm.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] Since the crankshaft body is rotatable and connected to the piston via a connecting rod, and the piston can rotate under the drive of the crankshaft body, after adding a fan plate baffle below the crankshaft fan plate, a certain amount of engine oil will accumulate on the crankshaft fan plate when the gasoline engine is running. When the crankshaft body rotates, it will drive the crankshaft fan plate to rotate, and the crankshaft fan plate will push the engine oil on the fan plate baffle to the bottom of the moving piston, which can cool and lubricate the piston, improve the piston's stable running time, and extend the piston's service life. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] In the attached diagram:

[0020] Figure 1A schematic diagram of the internal lubrication and cooling structure of the gasoline engine of the present invention is shown.

[0021] Figure 2 It shows Figure 1 A schematic diagram of the internal cavity of a gasoline engine.

[0022] The above figures include the following reference numerals:

[0023] 10 Gasoline engine cavity; 11 Fan plate baffle; 12 Cylinder bore; 13 Guide notch; 14 Oil baffle rib; 20 Crankshaft body; 21 Crankshaft fan plate; 22 Crank crank; 30 Connecting rod; 40 Piston. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] like Figure 1 and Figure 2 An internal lubrication and cooling structure for a gasoline engine includes a crankshaft body 20 rotatably fixed in the engine cavity 10. The crankshaft body 20 includes an eccentrically connected crankshaft fan 21 and a crank 22. The crankshaft fan 21 rotates coaxially with the crankshaft body 20. One end of the crankshaft fan 21 is fan-shaped with the rotation axis as the center, and the other end extends outward from the rotation axis and is connected to the crank 22. The engine cavity 10 is provided with an arc-shaped fan baffle 11, which is located below the crankshaft fan 21 and the centers of the two are coaxial. The crank 22 is connected to one end of a connecting rod 30, and the other end of the connecting rod 30 is connected to a piston 40.

[0027] In this invention, which employs the above-described technical solution, the crankshaft body 20 is rotatable and connected to the piston 40 via the connecting rod 30. The piston 40 is rotatable under the drive of the crankshaft body 20. Therefore, after adding a fan plate block 11 below the crankshaft fan plate 21, a certain amount of engine oil will accumulate on the fan plate block 11 when the gasoline engine is running. When the crankshaft body 20 rotates, it will drive the crankshaft fan plate 21 to rotate. The crankshaft fan plate 21 will push the engine oil on the fan plate block 11 to the bottom of the moving piston 40, which can cool and lubricate the piston 40, improve the stable running time of the piston 40, and extend the service life of the piston 40.

[0028] Furthermore, the radial clearance between the fan plate stop 11 and the crankshaft fan plate 21 is 2.5mm. This reasonable clearance ensures smooth rotation of the crankshaft fan plate 21 and facilitates the fan plate 21 in pushing out the oil from the fan plate stop 11, thereby lubricating the piston 40.

[0029] Furthermore, the fan-shaped baffle 11 is thin, which helps to reduce weight.

[0030] Furthermore, the thickness of the fan baffle 11 is 2mm, and the radius of its arc surface is 58mm. The specific dimensions of the fan baffle 11 can be changed according to the internal structure of the gasoline engine.

[0031] Furthermore, the distance by which the fan plate stop 11 protrudes along the crankshaft body 20 is greater than that of the crankshaft fan plate 21. The increased size of the fan plate stop 11 increases the oil storage area, facilitates oil retention, and enhances the lubrication and cooling effect on the piston 40.

[0032] Furthermore, the gasoline engine cavity 10 has a cylinder bore 12 near the crankshaft, and the fan plate block 11 has a guide notch 13 on the side near the cylinder bore 12. The guide notch 13 guides the flow of engine oil.

[0033] Furthermore, an oil baffle 14 is provided next to the crankshaft body 20, and the oil baffle 14 is located on the opposite side of the fan plate block 11. When the piston 40 moves downward, the oil carried out by the piston 40 will be sprayed out from the cylinder bore 12. When it encounters the oil baffle 14, the oil can form a fluid and slide down from the top to the connection end of the connecting rod 30 and the crank 22, thus lubricating the connection between the two.

[0034] Furthermore, the oil baffle 14 extends axially along the crankshaft body 20. The oil baffle 14 is large enough to provide good oil baffle performance.

[0035] Furthermore, the thickness of the oil baffle 14 gradually decreases along the direction away from the side wall of the gasoline engine cavity 10. The cast housing structure is provided with the oil baffle 14 with reduced thickness, which facilitates demolding while enhancing the structural strength of the oil baffle 14.

[0036] Furthermore, the length of the oil baffle 14 is 105mm, the thickest part is 5.6mm, and the thinnest part is 2mm.

[0037] The scope of this invention is not limited by the embodiments described above, but by the appended claims and their equivalents.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An internal lubrication and cooling structure for a gasoline engine, characterized in that, The system includes a crankshaft body (20) rotatably fixed in the inner cavity (10) of a gasoline engine. The crankshaft body (20) includes an eccentrically connected crankshaft fan plate (21) and a crank (22). The crankshaft fan plate (21) rotates coaxially with the crankshaft body (20). One end of the crankshaft fan plate (21) is fan-shaped with the rotation axis as the center, and the other end extends outward from the rotation axis and is connected to the crank (22). The inner cavity (10) of the gasoline engine is provided with an arc-shaped fan plate stop. (11) The fan plate stop (11) is located below the crankshaft fan plate (21) and the two are coaxial. When the fan-shaped end of the crankshaft fan plate (21) is rotating, a gap is formed radially between it and the fan plate stop (11). This gap pushes the oil on the fan plate stop (11) when the crankshaft fan plate (21) rotates. The crank (22) is connected to one end of the connecting rod (30), and the other end of the connecting rod (30) is connected to the piston (40). The gasoline engine cavity (10) has a cylinder bore (12) near the crankshaft, and the fan plate block (11) has a flow guide notch (13) on the side near the cylinder bore (12); the crankshaft body (20) has an oil baffle (14) on the side opposite the fan plate block (11).

2. The internal lubrication and cooling structure of the gasoline engine according to claim 1, characterized in that, The radial clearance between the fan plate stop block (11) and the crankshaft fan plate (21) is 2.5 mm.

3. The internal lubrication and cooling structure of the gasoline engine according to claim 1, characterized in that, The fan-shaped baffle (11) is in the shape of a thin block.

4. The internal lubrication and cooling structure of the gasoline engine according to claim 3, characterized in that, The thickness of the fan plate block (11) is 2mm and the radius of its arc surface is 58mm.

5. The internal lubrication and cooling structure of the gasoline engine according to claim 1, characterized in that, The distance by which the fan plate block (11) protrudes along the axial direction of the crankshaft body (20) is greater than that of the crankshaft fan plate (21).

6. The internal lubrication and cooling structure of the gasoline engine according to claim 1, characterized in that, The oil baffle (14) extends along the axial direction of the crankshaft body (20).

7. The internal lubrication and cooling structure of the gasoline engine according to claim 1, characterized in that, Along the direction away from the side wall of the gasoline engine cavity (10), the thickness of the oil baffle (14) gradually decreases.

8. The internal lubrication and cooling structure of the gasoline engine according to claim 7, characterized in that, The oil baffle rib (14) has a length of 105mm, a maximum thickness of 5.6mm, and a minimum thickness of 2mm.

Images