CN213088124U - Crankcase and two-stroke gasoline engine - Google Patents
Crankcase and two-stroke gasoline engine Download PDFInfo
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- CN213088124U CN213088124U CN202021801054.5U CN202021801054U CN213088124U CN 213088124 U CN213088124 U CN 213088124U CN 202021801054 U CN202021801054 U CN 202021801054U CN 213088124 U CN213088124 U CN 213088124U
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Abstract
The application discloses crankshaft box and two-stroke gasoline engine relates to the technical field of engines. The two-stroke gasoline engine comprises a spark plug, a cylinder box body, a piston, a crankshaft box body, at least one bearing seat and at least one bearing, wherein the crankshaft is in transmission connection with the piston and is used for driving the piston to move in the cylinder box body; the crankcase body is provided with a second cavity and two opposite inner side walls of the crankcase body; the second cavity is communicated with the scavenging passage, the crankcase body is connected with the cylinder box body, two mounting holes are respectively arranged on the inner side walls of the two box bodies, the bearing seat is arranged in the second cavity, and a first air squeezing channel is formed by a gap between the bearing seat and the inner side wall of the box body; the bearing is arranged in the bearing seat and sleeved on the crankshaft. This application is through making and leaving certain interval between bearing frame and the box inside wall to change the mixed gas circulation route of fuel and lubricating oil in the two-stroke gasoline engine, can effectually lubricate, wash, cool off the bearing.
Description
Technical Field
The application relates to the technical field of engines, in particular to a crankshaft box body and a two-stroke gasoline engine.
Background
The two-stroke gasoline engine is an engine which takes gasoline as fuel and converts heat energy into rotary energy. The two-stroke gasoline engine features high rotation speed, simple structure, light weight, low cost, smooth running and convenient use and maintenance. Gasoline engines as power sources are widely used in the fields of transportation, agricultural irrigation and drainage, civil engineering construction and the like.
The structure of a common two-stroke gasoline engine mainly comprises a cylinder block assembly, a left crankcase body, a right crankcase body, a crankshaft connecting rod assembly, a piston, an igniter, a spark plug, a fuel and lubricating oil supply system, an air inlet and exhaust system and a bearing for supporting the crankshaft to rotate. However, in the prior art, an optimized structure aiming at bearing lubrication is not arranged, so that the lubricating and cooling effects of the bearing are poor, the transmission efficiency of the bearing is reduced, the service life of the bearing is shortened, the service life of the gasoline engine is further shortened, and the energy consumption of the gasoline engine is increased.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of this application is to provide a bent axle box and two-stroke gasoline engine, it can have to bearing lubrication's optimization structure.
The embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present invention provides a crankshaft box, where the crankshaft box has a second cavity and two opposite inner side walls of the box, and two mounting holes are respectively formed on the two inner side walls of the box; at least one bearing seat is arranged in the second cavity, and a gap is reserved between the bearing seat and the inner side wall of the box body.
In an embodiment, the crankcase body includes a first case body and a second case body connected to each other, and the two mounting holes and the two bearing seats are respectively disposed on the first case body and the second case body.
In one embodiment, the bearing seat and the crankcase body are integrally formed or detachably connected.
In a second aspect, an embodiment of the present invention provides a two-stroke gasoline engine, including: spark plug, cylinder box, piston, bent axle box, at least one bearing frame and at least one bearing.
The spark plug is arranged on the cylinder box body; the cylinder box body is provided with a first cavity, the first cavity comprises a combustion chamber and a scavenging passage which are mutually communicated, the combustion chamber is connected with the spark plug, an air inlet hole is formed in the inner wall of the scavenging passage in the cylinder box body, and a scavenging hole is formed in the junction of the combustion chamber and the scavenging passage in the cylinder box body; the piston is arranged in the cylinder box body; the crankshaft is in transmission connection with the piston and is used for driving the piston to move in the cylinder box body; the crankcase body is provided with a second cavity and two opposite inner side walls of the crankcase body; the second cavity is communicated with the scavenging passage, the crankcase body is connected with the cylinder box body, two mounting holes are respectively formed in the inner side walls of the two box bodies, an oil seal is respectively arranged in each of the two mounting holes, and two ends of the crankshaft are respectively arranged in the two oil seals in a penetrating manner; the bearing seat is arranged in the second cavity, and a first air squeezing channel is formed by a gap between the bearing seat and the inner side wall of the box body; the bearing is installed in the bearing seat and sleeved on the crankshaft.
In one embodiment, two bearings are provided and are respectively sleeved on two ends of the crankshaft; correspondingly, the bearing seat is provided with two bearing seats which are respectively close to the two mounting holes.
In an embodiment, the crankcase body includes a first case body and a second case body connected to each other, and the two mounting holes and the two bearing seats are respectively disposed on the first case body and the second case body.
In one embodiment, the bearing seat and the crankcase body are integrally formed or detachably connected.
In an embodiment, each of the bearings is provided with an air passage, and the air passage is communicated with the second cavity.
In one embodiment, the bearing is a deep groove ball bearing.
In one embodiment, two scavenging partition plates arranged at intervals are arranged on the inner wall of the cylinder box body and positioned on the inner wall of the scavenging passage; and a gap is reserved between the scavenging partition plate and the bearing seat to form a second air squeezing channel, and the second air squeezing channel is communicated with the scavenging channel.
Compared with the prior art, the beneficial effect of this application is:
this application is through making and leaving certain interval between bearing frame and the box inside wall to change the mixed gas circulation route of fuel and lubricating oil in the two-stroke gasoline engine, can effectually lubricate, wash, cool off the bearing, thereby promoted the life of bearing, ensured the transmission efficiency of bearing thereby promoted two-stroke gasoline engine life and reduced two-stroke gasoline engine's energy consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a two-stroke gasoline engine according to an embodiment of the present disclosure when the piston is in a first predetermined position.
Fig. 2 is a schematic diagram of a two-stroke gasoline engine according to an embodiment of the present disclosure when the piston is in a second predetermined position.
Fig. 3 is a schematic structural view of a crankcase according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a two-stroke gasoline engine according to an embodiment of the present disclosure when the piston is in a first predetermined position.
Fig. 5 is a schematic diagram of a two-stroke gasoline engine according to an embodiment of the present disclosure when the piston is in a second predetermined position.
Fig. 6 is a partial schematic structural view of a two-stroke gasoline engine according to an embodiment of the present application.
Icon: 1-two-stroke gasoline engine; 100-a spark plug; 200-cylinder box body; 210-a first cavity; 211-a combustion chamber; 212-a scavenging path; 220-air intake; 230-scavenging holes; 240-scavenging partition plate; 300-a piston; 400-crankshaft; 410-a connecting rod; 420-a limiting block; 500-a bearing; 510-airway; 600-crankcase body; 610-a first box; 620-a second box; 630-a second cavity; 631-inner side wall of the box body; 640-mounting holes; 650-bearing seats; 651-bearing bore; 652-half frame; 710-a first squish channel; 720-second air squeezing channel; 800-oil seal.
In fig. 2 and 5, arrows show the flow paths of the fuel, oil and/or air mixture.
Detailed Description
The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.
In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1, a schematic structural diagram of a two-stroke gasoline engine 1 according to an embodiment of the present disclosure is shown when a piston 300 is at a first predetermined position. Please refer to fig. 2, which is a schematic structural diagram of the two-stroke gasoline engine 1 according to an embodiment of the present application when the piston 300 is at the second predetermined position.
The two-stroke gasoline engine 1 includes a spark plug 100, a cylinder housing 200, a piston 300, a crankshaft 400, a crankcase 600, two bearing blocks 650, and two bearings 500. The spark plug 100 is arranged in the cylinder box body 200; the cylinder case 200 is provided with a first cavity 210, the first cavity 210 comprises a combustion chamber 211 and a scavenging passage 212 which are communicated with each other, the combustion chamber 211 is connected with the spark plug 100, an air inlet hole 220 is arranged on the inner wall of the scavenging passage 212 in the cylinder case 200, and a scavenging hole 230 is arranged at the junction of the combustion chamber 211 and the scavenging passage 212 in the cylinder case 200.
The piston 300 is disposed in the cylinder housing 200, and the crankshaft 400 is drivingly connected to the piston 300 and drives the piston 300 to linearly move up and down in the cylinder housing 200.
The crankcase body 600 has a second cavity 630; the second cavity 630 is communicated with the scavenging passage 212, the crankcase body 600 is connected with the cylinder case 200, two mounting holes 640 are formed on the crankcase body 600,
two oil seals 800 are respectively arranged in the two mounting holes 640, and two ends of the crankshaft 400 are respectively arranged in the two oil seals 800 in a penetrating manner and used for sealing.
Two bearing blocks 650 are connected to an inner wall of the second cavity 630, and the two bearing blocks 650 are integrally formed with the crankcase body 600. Each bearing seat 650 has a bearing hole 651 for receiving the bearing 500 therein. The bearing hole 651 communicates with the mounting hole 640.
The two bearings 500 are installed in the bearing holes 651 of the bearing block 650, and are respectively sleeved on the two ends of the crankshaft 400 and sleeved on the crankshaft 400. The crankshaft 400 is rotatably fixed to a crankcase body 600 by a bearing 500.
In an operation process, when the crankshaft 400 rotates and the piston 300 moves upward, a negative pressure state is formed in the first cavity 210 of the cylinder housing 200, after the piston 300 continues to move upward to reach a first preset position, the intake hole 220 is opened, the scavenging hole 230 is closed, and a mixed gas of fuel, oil and/or air enters the first cavity 210.
The crankshaft 400 continues to rotate, the piston 300 moves downward, the air inlet 220 is gradually closed, the piston 300 continues to move downward, and the mixed gas of the fuel oil and the lubricating oil in the accommodating cavity is in a compressed state. After the piston 300 continues to move downwards to reach the second preset position, the scavenging hole 230 is opened, the air inlet hole 220 is closed, and the mixed gas of the fuel oil and the lubricating oil enters the combustion chamber 211 from the scavenging hole 230 through the scavenging passage 212 and scavenges the waste gas in the combustion chamber 211.
Wherein, the compressed mixture of fuel and lubricant is ignited by the spark plug 100 near the top dead center of the piston 300 to do work to push the piston 300 to move downwards, thus completing the working mechanism of the two-stroke gasoline engine in a circulating way.
Please refer to fig. 3, which is a schematic structural diagram of a crankcase 600 according to an embodiment of the present application.
The crankcase body 600 has a second cavity 630 and two opposite inner side walls 631 of the crankcase body, and two mounting holes 640 are respectively formed on the two inner side walls 631 of the crankcase body; at least one bearing seat 650 is disposed in the second cavity 630, and a space is left between the bearing seat 650 and the inner sidewall 631 of the case.
The crankcase body 600 includes a first case body 610 and a second case body 620, and the first case body 610 and the second case body 620 are detachably coupled together by means of a snap connection, a bolt connection, or the like. Two mounting holes 640 and two bearing housings 650 are provided on the first case 610 and the second case 620, respectively. The first case 610 and the second case 620 are provided to facilitate the installation and removal of the crankcase body 600.
The inner wall 631 may be a curved surface, a vertical plane, or an inclined plane. The bearing housing 650 may be provided with 1, 2, 3, or 4, etc. The bearing housing 650 is integrally formed with the crankcase body 600, or detachably coupled thereto by means of a snap-fit connection, a bolt connection, or the like.
In this embodiment, two bearing seats 650 are provided, and each bearing seat 650 is provided with a bearing hole 651 for mounting the bearing 500 therein.
In this embodiment, a certain space is left between the bearing seat 650 and the inner wall 631 of the case, so that when the embodiment is applied to the two-stroke gasoline engine 1, a flow line of a mixed gas of fuel oil and lubricating oil in the two-stroke gasoline engine 1 can be changed, and the bearing 500 can be effectively lubricated, cleaned and cooled, so that the service life of the bearing 500 is prolonged, and the transmission efficiency of the bearing 500 is ensured, thereby prolonging the service life of the two-stroke gasoline engine 1 and reducing the energy consumption of the two-stroke gasoline engine 1.
Referring to fig. 4, it is a schematic structural diagram of the two-stroke gasoline engine 1 according to an embodiment of the present application when the piston 300 is at the first predetermined position. Referring to fig. 5, it is a schematic structural diagram of the two-stroke gasoline engine 1 according to an embodiment of the present application when the piston 300 is at the second predetermined position.
The two-stroke gasoline engine 1 uses the crankcase body 600 shown in the embodiment of fig. 3.
The bearing housing 650 is disposed in the second cavity 630, and a space between the bearing housing 650 and the inner sidewall 631 of the case body forms the first purge channel 710.
Two scavenging partition plates 240 which are arranged at intervals are arranged on the inner wall of the scavenging passage 212 on the inner wall of the cylinder box body 200; the scavenging partition 240 is spaced from the bearing seat 650 to form a second squish passage 720, and the second squish passage 720 is communicated with the scavenging duct 212.
The air duct 510, the first air squeezing channel 710 and the second air squeezing channel 720, the scavenging duct 212, the scavenging holes 230 and the combustion chamber 211 are communicated with each other for air circulation.
The two bearings 500 of the present embodiment are deep groove ball bearings, and the deep groove ball bearings have the characteristics of high transmission efficiency and good reliability, so the present embodiment uses the deep groove ball bearings to support the crankshaft 400 to rotate.
Each bearing 500 is provided with an air duct 510, and the air duct 510 is communicated with the second cavity 630.
In an operation process, when the crankshaft 400 rotates and the piston 300 moves upward, a negative pressure state is formed in the first cavity 210 of the cylinder housing 200, after the piston 300 continues to move upward to reach a first preset position, the intake hole 220 is opened, the scavenging hole 230 is closed, and a mixed gas of fuel, oil and/or air enters the first cavity 210.
The crankshaft 400 continues to rotate, the piston 300 moves downward, the air inlet 220 is gradually closed, the piston 300 continues to move downward, and the mixed gas of the fuel oil and the lubricating oil in the accommodating cavity is in a compressed state. After the piston 300 continues to move downwards to reach the second preset position, the scavenging hole 230 is opened, the intake hole 220 is closed, and the mixed gas of the fuel oil and the lubricating oil passes through the air duct 510, the first air squeezing channel 710 and the second air squeezing channel 720, then passes through the scavenging duct 212, enters the combustion chamber 211 from the scavenging hole 230, and scavenges the waste gas in the combustion chamber 211.
Wherein, the compressed mixture of fuel and lubricant is ignited by the spark plug 100 near the top dead center of the piston 300 to do work to push the piston 300 to move downwards, thus completing the working mechanism of the two-stroke gasoline engine in a circulating way.
Therefore, in the present embodiment, by additionally changing the flow path line of the mixed gas of fuel, oil and/or air, compared with the embodiment shown in fig. 1 and 2, the flow path of the air duct 510, the first air-squeezing passage 710 and the second air-squeezing passage 720 are additionally provided, and the mixed gas of fuel, oil and/or air is forcibly circulated inside the bearing 500 through the air duct 510, so that the moving parts of the bearing 500 can be more effectively lubricated, cleaned and cooled by the mixed gas of fuel, oil and air (diluted oil), thereby prolonging the service life of the bearing 500, ensuring the transmission efficiency of the bearing 500, and thus prolonging the service life of the two-stroke gasoline engine 1 and reducing the energy consumption of the engine.
Please refer to fig. 6, which is a schematic partial structure diagram of a two-stroke gasoline engine 1 according to an embodiment of the present application. A connecting rod 410 is connected to the crankshaft 400, and the crankshaft 400 is connected to the piston 300 through the connecting rod 410. The crankshaft 400 is provided with a stopper 420 at each of both sides of the connecting rod 410.
Each bearing pedestal 650 is provided at the top thereof with a half frame 652, the half frame 652 is similar to a U-shaped structure, when the first casing 610 and the second casing 620 are connected, the two half frames 652 are abutted against each other to form a complete frame, and the connecting rod 410 extends from a middle hole of the two half frames 652.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The crankshaft box body is characterized by comprising a second cavity and two opposite inner side walls of the box body, wherein two mounting holes are respectively formed in the two inner side walls of the box body;
at least one bearing seat is arranged in the second cavity, and a gap is reserved between the bearing seat and the inner side wall of the box body.
2. The crankcase body according to claim 1, wherein the crankcase body includes a first case body and a second case body coupled to each other, and two of the mounting holes and two of the bearing seats are provided in the first case body and the second case body, respectively.
3. The crankcase body of claim 2, wherein the bearing seat is integrally formed with the crankcase body or is removably attached thereto.
4. A two-stroke gasoline engine comprising:
the air cylinder box body is provided with a first cavity, the first cavity comprises a combustion chamber and a scavenging passage which are mutually communicated, an air inlet hole is formed in the inner wall of the scavenging passage in the air cylinder box body, and a scavenging hole is formed in the junction of the combustion chamber and the scavenging passage in the air cylinder box body;
the spark plug is arranged in the cylinder box body, and the combustion chamber is connected with the spark plug;
the piston is arranged in the cylinder box body;
the crankshaft is in transmission connection with the piston and is used for driving the piston to move in the cylinder box body;
the crankcase body is provided with a second cavity and two opposite inner side walls of the crankcase body; the second cavity is communicated with the scavenging passage, the crankcase body is connected with the cylinder box body, two mounting holes are respectively formed in the inner side walls of the two box bodies, an oil seal is respectively arranged in each of the two mounting holes, and two ends of the crankshaft are respectively arranged in the two oil seals in a penetrating manner;
the bearing seat is arranged in the second cavity, and a first air squeezing channel is formed by a gap between the bearing seat and the inner side wall of the box body; and
and the bearing is arranged in the bearing seat and sleeved on the crankshaft.
5. The two-stroke gasoline engine of claim 4 wherein two of said bearings are disposed on each end of said crankshaft;
correspondingly, the bearing seat is provided with two bearing seats which are respectively close to the two mounting holes.
6. The two-stroke gasoline engine as defined in claim 5 wherein said crankcase body comprises a first case body and a second case body connected to each other, and two of said mounting holes and two of said bearing seats are provided in said first case body and said second case body, respectively.
7. The two-stroke gasoline engine of claim 5 wherein the bearing block is integrally formed with the crankcase body or is removably attached thereto.
8. The two-stroke gasoline engine of claim 5 wherein each of said bearings has an air passage therein, said air passage communicating with said second cavity.
9. The two-stroke gasoline engine of claim 4 wherein the bearings are deep groove ball bearings.
10. The two-stroke gasoline engine as defined in claim 4, wherein two scavenging partition plates are disposed on the inner wall of the cylinder housing and on the inner wall of the scavenging passage at intervals;
and a gap is reserved between the scavenging partition plate and the bearing seat to form a second air squeezing channel, and the second air squeezing channel is communicated with the scavenging channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021801054.5U CN213088124U (en) | 2020-08-25 | 2020-08-25 | Crankcase and two-stroke gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021801054.5U CN213088124U (en) | 2020-08-25 | 2020-08-25 | Crankcase and two-stroke gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213088124U true CN213088124U (en) | 2021-04-30 |
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ID=75632393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021801054.5U Active CN213088124U (en) | 2020-08-25 | 2020-08-25 | Crankcase and two-stroke gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213088124U (en) |
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2020
- 2020-08-25 CN CN202021801054.5U patent/CN213088124U/en active Active
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