Star type two-stroke engine

Abstract

The utility model discloses a star type two-stroke engine which comprises an upper crank case, a lower crank case is arranged below the upper crank case, a main circuit, a branch circuit, a branch oil pipe and a main oil pipe are arranged on the crank case, a supercharger cover is arranged below the lower crank case, a crank case bottom cover is arranged below the supercharger cover, and the main oil pipe is arranged below the crank case bottom cover. A crankcase top cover is arranged on the upper portion of the crankcase, an output shaft spline and an M24 bolt are arranged on the crankcase top cover, a plurality of cylinders are arranged on the crankcase, a negative crankshaft is arranged in the crankcase, a crankshaft gear is arranged on the top of the negative crankshaft, a speed reduction shaft is arranged on one side of the crankshaft gear, and the speed reduction shaft is arranged on the other side of the crankshaft gear. The speed reduction shaft is provided with a joint sleeve, one side of the joint sleeve is provided with a shifting fork, the shifting fork is provided with a shifting fork rod, and the speed reduction device has the advantages of being good in balance, high in efficiency and strong in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a star-shaped two-stroke engine. Background Art

[0002] With the rapid development of science and technology, traditional modes of transportation are undergoing unprecedented changes. Cars and airplanes, two once independent means of transportation, are now merging into a new mode of travel, namely flying cars. The emergence of flying cars will not only greatly change people's travel methods, but will also have a profound impact on modern society.

[0003] Looking at flying cars from different angles is a prerequisite for research and development, production and practical use. Whether in terms of technology or application, flying cars will have higher requirements than traditional cars and have a wider range of uses. Nowadays, many car companies have launched concept cars designed and developed by themselves. For example, Tesla's wingless concept flying car MdelA, its propellers are hidden under the mesh structure of the body, and the cockpit adopts a universal ball structure, which can keep the car in a horizontal state when flying, and it can drive on the road and fly in the air. There is also a flying car launched by the domestic Xiaopeng Motors in the shape of a drone. As the name suggests, propellers are distributed around the car, but unlike Tesla cars, it can only fly in the air. Although it is temporarily impossible to achieve the technology of both driving and flying like Tesla cars, this has proved that China has made major breakthroughs in the research and development of flying cars. The purpose of designing and developing flying cars is to better serve mankind, and it is even more powerful in life, such as express delivery, take-out and other logistics distribution, or emergency rescue and material transportation in the face of sudden disasters. Especially nowadays, the traffic pressure in major cities is very high. If flying cars come out, it will undoubtedly greatly improve the current traffic pressure, which will not only facilitate people's travel but also improve traffic efficiency. In addition, many countries have gradually formulated and issued relevant policies for flying cars, encouraging companies to vigorously develop flying cars, so as to promote the development speed of flying cars.

[0004] However, most existing flying cars use four-stroke engines, which have poor output efficiency and use diesel as a driving fuel, so the combustion time in the cylinder is longer than that of a gasoline engine, the compression ratio is high, and power cannot be output in time, thus reducing the overall performance of the flying car. Therefore, in order to correct the above defects, we propose a radial two-stroke engine. Utility Model Content

[0005] The technical problem solved by the utility model is to overcome the defects of the prior art and provide a star-shaped two-stroke engine.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a star-shaped two-stroke engine, comprising a crankcase upper, a crankcase lower is arranged below the crankcase upper, and a main circuit, a branch circuit, an oil distribution pipe and a main oil pipe are respectively arranged on the crankcase, a supercharger cover is arranged below the crankcase lower, a crankcase bottom cover is arranged below the supercharger cover, a crankcase top cover is arranged above the crankcase, and an output shaft spline and M24 bolts are arranged on the crankcase top cover.

[0007] Preferably, a plurality of cylinders are arranged on the crankcase, and a negative crankshaft is arranged on the crankcase, a crankshaft gear is arranged on the top of the negative crankshaft, a reduction shaft is arranged on one side of the crankshaft gear, a coupling sleeve is arranged on the reduction shaft, a shift fork is arranged on one side of the coupling sleeve, a shift fork rod is arranged on the shift fork, the top end of the shift fork rod passes through the crankcase top cover, a timing gear is arranged under the negative crankshaft, a piston and a piston pin are arranged in the cylinder, an air valve is arranged on the crankcase, and a plurality of crank connecting rods are arranged on the crankcase, the crank connecting rod is arranged on the negative crankshaft, and a secondary connecting rod is arranged on the crank connecting rod.

[0008] Preferably, a boost fan and a positive crankshaft are provided in the supercharger cover, and the boost fan and the positive crankshaft are arranged on the negative crankshaft.

[0009] Preferably, an oil seal and an output bevel gear are arranged in the crankcase bottom cover, the oil seal sleeve is arranged on the negative crankshaft, the output bevel gear is arranged on the negative crankshaft, and a bevel gear locking ring is arranged in the output bevel gear.

[0010] Preferably, a spark plug and a fuel injector are provided on the outer shell of the crankcase, and a spark plug wiring harness is provided on the spark plug.

[0011] Preferably, a fixed shaft gear, a left propeller transmission gear, a right propeller transmission gear, a crankshaft output gear and a secondary reduction gear are provided on the crankcase, and a primary reduction gear is provided above the fixed shaft gear, and the fixed shaft gear, the primary reduction gear, the left propeller transmission gear, the right propeller transmission gear, the crankshaft output gear and the secondary reduction gear are meshed with each other.

[0012] Preferably, the main circuit, branch circuits, branch oil pipes and main oil pipe are distributed in sequence up and down.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. This design uses a star-shaped six-cylinder two-stroke engine. All cylinders are arranged around a central point. This structure is conducive to reducing the overall size and weight of the engine, and has advantages in terms of lightness and space. Due to the symmetrical arrangement of the cylinders, the six-cylinder star engine has better balance when running at high speed;

[0015] 2. The engine adopts a two-stroke design, which allows the engine to complete two work transfers in each cycle. Compared with a four-stroke engine, it can complete more work in the same time and has a higher power output, which provides favorable conditions for rapid acceleration and high performance. It is important that this design will use a gasoline engine. Traditional diesel engines work by compression ignition, and the diesel burns longer in the cylinder than gasoline engines. Gasoline engines work by ignition, not only with a small compression ratio, but also with a very short combustion time, so gasoline engines can output power in time. Therefore, the overall performance of gasoline engines is better than that of diesel engines, and more suitable for flying cars. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Center section view CC;

[0018] Figure 3 for Figure 1 Middle section view BB;

[0019] Figure 4 for Figure 1 Middle section view AA;

[0020] Figure 5 for Figure 3 Center section view EE.

[0021] Numbers in the figure: 1, output shaft spline; 2, crankcase top cover; 3, crankcase upper; 4, crankcase lower; 5, supercharger cover; 6, crankcase bottom cover; 7, crankshaft connecting rod; 8, bevel gear lock ring; 9, crankshaft positive; 10, fixed shaft gear; 11, secondary reduction gear; 12, right propeller transmission gear; 13, left propeller transmission gear; 14, crankshaft negative; 15, crankshaft gear; 16, fork; 17, Pull fork rod; 18, M24 bolt; 19, coupling sleeve; 20, reduction shaft; 21, main circuit; 22, air valve; 23, branch circuit; 24, cylinder; 25, piston; 26, oil distribution pipe; 27, piston pin; 28, main oil pipe; 29, timing gear; 30, boost fan; 31, oil seal; 32, output bevel gear; 33, spark plug; 34, fuel injector; 35, auxiliary connecting rod; 36, spark plug wiring harness. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides a technical solution: a star-shaped two-stroke engine, including a crankcase upper 3, characterized in that: a crankcase lower 4 is arranged below the crankcase upper 3, a spark plug 33 and an oil injector 34 are arranged on the outer shell of the crankcase upper 3, a spark plug wiring harness 36 is arranged on the spark plug 33, a fixed shaft gear 10, a left propeller transmission gear 13, a right propeller transmission gear 12, a crankshaft output gear and a secondary reduction gear 11 are arranged in the crankcase upper 3, a primary reduction gear is arranged above the fixed shaft gear 10, and the fixed shaft gear 1 0, the first-stage reduction gear, the left propeller transmission gear 13, the right propeller transmission gear 12, the crankshaft output gear and the second-stage reduction gear 11 are meshed, a plurality of cylinders 24 are arranged on the crankcase upper 3, and a crankshaft negative 14 is arranged in the crankcase upper 3, a crankshaft gear 15 is arranged on the top of the crankshaft negative 14, a reduction shaft 20 is arranged on one side of the crankshaft gear 15, a coupling sleeve 19 is arranged on the reduction shaft 20, a shift fork 16 is arranged on one side of the coupling sleeve 19, a shift fork rod 17 is arranged on the shift fork 16, and the top end of the shift fork rod 17 passes through the top of the crankcase The cover 2 is provided with a timing gear 29 below the crankshaft negative 14, a piston 25 and a piston pin 27 are provided in the cylinder 24, a valve 22 is provided on the crankcase 3, and a plurality of crankshaft connecting rods 7 are provided in the crankcase 3, the crankshaft connecting rod 7 is provided on the crankshaft negative 14, and a secondary connecting rod 35 is provided on the crankshaft connecting rod 7, and a total circuit 21, a branch circuit 23, a distribution oil pipe 26 and a main oil pipe 28 are provided on the crankcase 3, respectively, and the total circuit 21, the branch circuit 23, the distribution oil pipe 26 and the main oil pipe 28 are distributed in sequence from top to bottom, and a valve 22 is provided below the crankcase 4. A supercharger cover 5, in which a boost fan 30 and a positive crankshaft 9 are arranged, the boost fan 30 and the positive crankshaft 9 are arranged on the negative crankshaft 14, a crankcase bottom cover 6 is arranged below the supercharger cover 5, an oil seal 31 and an output bevel gear 32 are arranged in the crankcase bottom cover 6, the oil seal 31 is sleeved on the negative crankshaft 14, the output bevel gear 32 is arranged on the negative crankshaft 14, and a bevel gear locking ring 8 is arranged in the output bevel gear 32, a crankcase top cover 2 is arranged above the crankcase upper 3, and the crankcase top cover 2 is provided with an output shaft spline 1 and an M24 bolt 18.

[0024] Working principle: The force generated by the piston 25 is transmitted to the crankshaft front gear through the crankshaft, and then transmitted to the primary reduction gear by the crankshaft front gear, and finally to the secondary reduction gear 11. The secondary reduction gear 11 drives the propeller shaft to rotate, outputs power to the outside, and finally drives the propeller to rotate to generate lift to drive the car. In addition, the design of the propeller gear transmission group adopts an innovative combination method, that is, the synchronous coupling sleeve 19. The coupling sleeve 19 generates axial movement along the output shaft spline 1 through the shift fork 16. When the coupling sleeve 19 meshes with the primary reduction shaft upward, the crankshaft only generates force on the gearbox end, and does not generate power output to the propeller gear set, that is, the car is a wheel drive mode; when the coupling sleeve 19 meshes with the primary reduction shaft large gear downward, the propeller gear set forms a power source, and the driver controls the neutral position through the clutch to disconnect the power output of the gearbox, and it is in the flying state at this time.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A radial two-stroke engine, comprising a crankcase (3), characterized in that: A crankcase lower (4) is arranged below the crankcase upper (3), and a main circuit (21), a branch circuit (23), an oil distribution pipe (26) and a main oil pipe (28) are respectively arranged on the crankcase upper (3); a supercharger cover (5) is arranged below the crankcase lower (4), and a crankcase bottom cover (6) is arranged below the supercharger cover (5); a crankcase top cover (2) is arranged above the crankcase upper (3), and an output shaft spline (1) and an M24 bolt (18) are arranged on the crankcase top cover (2).

2. A radial two-stroke engine according to claim 1, characterized in that: The crankcase (3) is provided with a plurality of cylinders (24), and a crankshaft (14) is provided inside the crankcase (3). A crankshaft gear (15) is provided on the top of the crankshaft gear (14). A reduction shaft (20) is provided on one side of the crankshaft gear (15). A coupling sleeve (19) is provided on the reduction shaft (20). A shift fork (16) is provided on one side of the coupling sleeve (19). A shift fork rod (17) is provided on the shift fork (16). The top end of the fork rod (17) passes through the crankcase top cover (2); a timing gear (29) is arranged below the crankshaft negative (14); a piston (25) and a piston pin (27) are arranged in the cylinder (24); an air valve (22) is arranged on the crankcase upper (3); and a plurality of crankshaft connecting rods (7) are arranged in the crankcase upper (3); the crankshaft connecting rod (7) is arranged on the crankshaft negative (14), and a secondary connecting rod (35) is arranged on the crankshaft connecting rod (7).

3. A radial two-stroke engine according to claim 1, characterized in that: A supercharger fan (30) and a positive crankshaft (9) are arranged inside the supercharger cover (5), and the supercharger fan (30) and the positive crankshaft (9) are arranged on a negative crankshaft (14).

4. A radial two-stroke engine according to claim 1, characterized in that: An oil seal (31) and an output bevel gear (32) are arranged in the crankcase bottom cover (6); the oil seal (31) is sleeved on the crankshaft negative (14); the output bevel gear (32) is arranged on the crankshaft negative (14); and a bevel gear lock ring (8) is arranged in the output bevel gear (32).

5. A radial two-stroke engine according to claim 1, characterized in that: A spark plug (33) and a fuel injection nozzle (34) are arranged on the outer shell of the crankcase (3), and a spark plug wiring harness (36) is arranged on the spark plug (33).

6. A radial two-stroke engine according to claim 1, characterized in that: The crankcase (3) is provided with a fixed shaft gear (10), a left propeller transmission gear (13), a right propeller transmission gear (12), a crankshaft output gear and a secondary reduction gear (11); a primary reduction gear is provided above the fixed shaft gear (10); the fixed shaft gear (10), the primary reduction gear, the left propeller transmission gear (13), the right propeller transmission gear (12), the crankshaft output gear and the secondary reduction gear (11) are meshed with each other.

7. A radial two-stroke engine according to claim 1, characterized in that: The main circuit (21), the branch circuit (23), the branch oil pipe (26) and the main oil pipe (28) are sequentially distributed in an upper and lower manner.

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