Single-cylinder two-stroke cam piston engine

Abstract

The utility model discloses a single-cylinder two-stroke cam piston engine, which relates to the technical field of thermodynamic piston internal combustion engines, and comprises a cylinder body with radiating fins and an oil tank, the side end of the cylinder body with the radiating fins is provided with a motion assembly, and the motion assembly comprises a propeller fixing screw, a propeller body, a flywheel with a magnet and a fixing support. The power transmission assembly is arranged in the cylinder body with the cooling fins and comprises a transmission main shaft, a piston pin, a piston body and a cylinder sleeve, a cam pin is fixed to a cam cover body and penetrates through a curve-shaped cam groove of the piston body, a traditional crank-link mechanism is replaced, linear motion of the piston body is converted into rotary motion, and the rotary motion of the piston body is converted into rotary motion. And the cam bush is arranged at the tail end of the cam pin in a sleeving mode and matched with the cam cover body, friction between the cam pin and the cylinder body is reduced, transmission smoothness is improved, and the bearing reduces radial and axial jumping during rotation of the main shaft and reduces friction loss.

Description

TECHNICAL FIELD

[0001] The utility model relates to thermodynamic piston internal combustion engine technical field, especially a single cylinder two -stroke cam piston engine. BACKGROUND

[0002] At present, piston internal combustion engine is one of social development initiative power machinery, mainly including two categories: four -stroke piston engine and two -stroke piston engine, internal movement form conversion mechanism adopts crank connecting rod mechanism, and the linear motion of piston is converted into the rotation movement required by general transmission through the crank connecting rod mechanism.

[0003] Piston is moved to the top dead center under the drive of the crankshaft. When the piston is still at the bottom dead center, the intake hole is closed by the piston, and the exhaust hole and the scavenging hole are opened. At this time, the combustible mixture in the crankcase enters the cylinder through the scavenging hole, and the exhaust gas in the cylinder is scavenged. The piston moves from the top dead center to the bottom dead center. At the end of the compression process, the spark plug generates an electric spark to ignite the combustible mixture in the cylinder, and the combustion gas expands to do work.

[0004] The crank connecting rod mechanism adopted by the piston engine occupies a large volume of the engine, making it difficult to miniaturize the engine. At the same time, when the crank connecting rod mechanism of the single cylinder engine rotates, the unbalanced mass will produce eccentric load, causing the engine to produce large vibration and noise. The complex crank connecting rod mechanism also wastes a lot of time and cost in maintenance and maintenance. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a single cylinder two -stroke cam piston engine, which solves the technical problems that the single cylinder engine crank connecting rod mechanism rotates due to unbalanced mass, which produces eccentric load and causes the engine to produce large vibration and noise. The complex crank connecting rod mechanism also wastes a lot of time and cost in maintenance and maintenance.

[0006] In order to achieve the above purpose, the utility model is realized by the following technical scheme:

[0007] A single cylinder two -stroke cam piston engine, a single cylinder two -stroke cam piston engine, including the cylinder with fin and oil tank, the side end of the cylinder with fin is provided with motion assembly, the motion assembly includes propeller fixing screw, propeller body, flywheel with magnet and fixed support, further including;

[0008] Power transmission assembly, the power transmission assembly is arranged in the inside of the cylinder with fin, the power transmission assembly includes transmission main shaft, piston pin, piston body and cylinder liner, the side end of the cylinder liner is provided with at least two bottom shell fixing screws, the side end of the cylinder liner is provided with spark plug, the surface of the cylinder liner is provided with finned bottom shell.

[0009] Preferably, the surface of the cylinder body with heat dissipation fins is provided with a fuel supply module, the fuel supply module comprises an oil injector fixing screw, an oil injector body and an oil inlet gasket, and the surface of the cylinder body with heat dissipation fins is provided with a lubricating oil pipeline.

[0010] The surface of the cylinder body with heat dissipation fins is provided with an exhaust assembly, the exhaust assembly comprises an electric wire, an exhaust port fixing screw and an exhaust port body, and the exhaust port body adopts a gradually expanding structure.

[0011] The surface of the cylinder body with heat dissipation fins is provided with a cam pin, the end of the cam pin is provided with a cam bushing, and the side end of the cam bushing is provided with a cam cover gasket.

[0012] The bottom end of the cam cover gasket is provided with a cam cover body, and the end of the cam cover body is provided with at least two cam cover fixing screws.

[0013] Preferably, the inner side of the cylinder body with heat dissipation fins is provided with a bearing, and the side end of the cylinder body with heat dissipation fins is provided with a CD I igniter.

[0014] The side end of the flywheel with a magnet is provided with a fastening screw, the end of the fastening screw is inserted into the CD I igniter, and the side end of the flywheel with a magnet is provided with a flywheel fixing nut.

[0015] The curved cam groove of the piston body is in sliding fit with the cam pin, and the cross section of the curved cam groove is in arc-shaped structure, so as to guide the movement of the piston body.

[0016] A wear-resistant bushing is arranged at the connecting position of the transmission main shaft and the piston pin.

[0017] The cylinder body with heat dissipation fins and the heat dissipation fins of the bottom shell with fins are staggered.

[0018] Compared with the prior art, the utility model has the advantages of the following beneficial effects.

[0019] In the utility model, the flywheel with a magnet is connected with the transmission main shaft through a spline, no additional transmission gear is needed, the radial space is further compressed, the piston is rigidly connected with the main shaft through a piston pin, the rotary motion is directly transmitted to the main shaft, the power transmission path is simplified, the piston body is matched with the cam pin, the cam pin is fixed to the cylinder body, when the piston body reciprocates, the cam pin slides in the groove, the rotary motion of the piston body is forced, the crank connecting rod mechanism is cancelled, the volume is reduced and the weight is lightened, the utility model is easy to disassemble and assemble, and the maintenance time and cost are reduced.

[0020] The utility model discloses a cam pin is fixed in cam cover body, passes through the curve type cam groove of piston body, replaces traditional crank connecting rod mechanism, converts the linear motion of piston body into rotary motion, and the radial force of piston body motion is borne simultaneously, and cam bushing is sleeved in the end of cam pin, and is cooperated with cam cover body, reduces the friction between cam pin and cylinder body, improves transmission smoothness, bearing reduces the radial and axial runout of main shaft rotation, reduces friction loss. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model are described in detail below.

[0022] Figure 1 It is the structure diagram of two stroke engine of the utility model;

[0023] Figure 2 It is the side view of two stroke engine of the utility model;

[0024] Figure 3 It is the structure diagram of propeller body of the utility model

[0025] Figure 4 It is the structure diagram of piston body of the utility model

[0026] Figure 5 It is the sectional view of cylinder body with radiating fin of the utility model;

[0027] Figure 6 It is the structure diagram of transmission main shaft of the utility model.

[0028] In the drawing: 1, propeller fixed screw, 2, propeller body, 3, flywheel with magnet, 4, fixed support, 5, cylinder body with radiating fin, 6, oil tank, 7, oil atomizer fixed screw, 8, oil atomizer body, 9, oil inlet gasket, 10, lubricating oil pipeline, 11, transmission main shaft, 12, piston pin, 13, piston body, 14, cylinder liner, 15, bottom shell fixed screw, 16, spark plug, 17, bottom shell with fin, 18, electric wire, 19, exhaust port fixed screw, 20, exhaust port body, 21, cam pin, 22, cam bushing, 23, cam cover gasket, 24, cam cover body, 25, cam cover fixed screw, 26, bearing, 27, CDI igniter, 28, fastening screw, 29, flywheel fixed nut. DETAILED DESCRIPTION

[0029] The embodiment of the application provides a single-cylinder two-stroke cam piston engine, effectively solves the problem that eccentric load is generated due to mass imbalance when a single-cylinder engine crank connecting rod mechanism rotates, the engine generates large vibration and noise, and a large amount of time and cost is wasted in overhauling and maintaining the complex crank connecting rod mechanism, the magnet flywheel is connected with the transmission main shaft through splines, no additional transmission gear is needed, the radial space is further compressed, the piston is rigidly connected with the main shaft through a piston pin, the rotary motion is directly transmitted to the main shaft, the power transmission path is simplified, the piston body is matched with the cam pin, the cam pin is fixed to the cylinder body, when the piston body reciprocates, the cam pin slides in the groove, and the rotary motion of the piston body is forced, the crank connecting rod mechanism is cancelled, the volume is reduced and the weight is lightened, the single-cylinder two-stroke cam piston engine is easy to disassemble and assemble, and the maintenance time and cost are reduced.

[0030] Embodiment

[0031] As shown in Figure 1 - Figure 6 The technical scheme in the embodiment of the application effectively solves the technical problems that eccentric load is generated due to mass imbalance when a single-cylinder engine crank connecting rod mechanism rotates, the engine generates large vibration and noise, and a large amount of time and cost is wasted in overhauling and maintaining the complex crank connecting rod mechanism, and the general idea is as follows:

[0032] In view of the problems in the prior art, the utility model provides a single-cylinder two-stroke cam piston engine, including with heat dissipation fin cylinder body 5 and oil tank 6, with heat dissipation fin cylinder body 5's side end is provided with motion assembly, motion assembly includes propeller fixed screw 1, propeller body 2, with magnet flywheel 3 and fixed support 4, with magnet flywheel 3 is fixed through the spline on transmission main shaft 11 and flywheel fixed nut 29, rotates synchronously with the main shaft, fixed support 4 is used to install CDI igniter 27, is fixed through fastening screw 28, ensures that the ignition system is stable

[0033] Power transmission assembly, power transmission assembly is arranged in the inside of with heat dissipation fin cylinder body 5, power transmission assembly includes transmission main shaft 11, piston pin 12, piston body 13 and cylinder liner 14, at least two bottom shell fixed screws 15 are provided at the side end of cylinder liner 14, spark plug 16 is provided at the side end of cylinder liner 14, the surface of cylinder liner 14 is provided with finned bottom shell 17, transmission main shaft 11 is rigidly connected with piston body 13 through piston pin 12, the reciprocating motion and rotary motion of the piston are transmitted to the main shaft through piston pin 12, piston pin 12 penetrates piston body 13 and transmission main shaft 11, forms a hinged point, and the linear motion and rotary motion of the piston are transmitted to the main shaft, and cylinder liner 14 is fixed to the inner wall of with heat dissipation fin cylinder body 5 to provide a motion guide rail for piston body 13;

[0034] The surface of the cylinder body 5 with cooling fins is provided with a fuel supply module, which comprises an oil injector fixing screw 7, an oil injector body 8 and an oil inlet gasket 9. The surface of the cylinder body 5 with cooling fins is provided with a lubricating oil pipeline 10. The oil injector body 8 is fixed to the side of the cylinder body 5 with cooling fins by the oil injector fixing screw 7. The oil injector body 8 is communicated with the oil tank 6 through an oil inlet. The fuel is sprayed into the oil inlet in the form of mist according to the working condition of the engine. The oil inlet gasket 9 is connected to the connecting part of the oil injector body 8 to prevent fuel leakage. The lubricating oil pipeline 10 delivers lubricating oil to the piston body 13 and the cam pin 21 to reduce friction loss.

[0035] The surface of the cylinder body 5 with cooling fins is provided with an exhaust assembly, which comprises an electric wire 18, an exhaust port fixing screw 19 and an exhaust port body 20. The exhaust port body 20 adopts a gradually expanding structure to reduce exhaust back pressure, make the exhaust gas flow out more smoothly and improve the power performance of the engine. The electric wire 18 connects the CDI igniter 27 and the spark plug 16 to transmit the ignition electric signal.

[0036] The surface of the cylinder body 5 with cooling fins is provided with a cam pin 21. The end of the cam pin 21 is provided with a cam bushing 22. The side end of the cam bushing 22 is provided with a cam cover gasket 23. The cam pin 21 is fixed to a cam cover body 24 and passes through a curved cam groove of the piston body 13 to replace the traditional crank connecting rod mechanism, convert the linear motion of the piston body 13 into rotary motion and bear the radial force of the piston body 13 at the same time. The cam bushing 22 is sleeved on the end of the cam pin 21 and cooperates with the cam cover body 24 to reduce the friction between the cam pin 21 and the cylinder body and improve the smoothness of transmission.

[0037] The bottom end of the cam cover gasket 23 is provided with the cam cover body 24. The end of the cam cover body 24 is provided with at least two cam cover fixing screws 25. The cam cover body 24 is installed on the cylinder body 5 with cooling fins by the cam cover fixing screws 25 and is sealed by the cam cover gasket 23 to fix the position of the cam pin 21 and ensure the stability and sealing performance of the rotary motion of the piston body 13.

[0038] The inner side of the cylinder body 5 with cooling fins is provided with a bearing 26. The side end of the cylinder body 5 with cooling fins is provided with a CDI igniter 27. The bearing 26 reduces the radial and axial runout of the main shaft during rotation and reduces friction loss.

[0039] The CDI igniter 27 is installed by a fixing bracket 4. High-voltage electricity is generated by electromagnetic induction when the magnet flywheel 3 rotates. The electric wire 18 triggers the spark plug 16 to ignite.

[0040] The side end of the magnet flywheel 3 is provided with a fastening screw 28. The end of the fastening screw 28 is inserted into the CDI igniter 27. The side end of the magnet flywheel 3 is provided with a flywheel fixing nut 29.

[0041] The curved cam groove of the piston body 13 is in sliding fit with the cam pin 21, and the cross section of the curved cam groove is arc-shaped to guide the movement of the piston body 13;

[0042] The connecting part of the transmission main shaft 11 and the piston pin 12 is provided with a wear-resistant bushing to improve the transmission reliability;

[0043] The heat dissipation fins of the cylinder body 5 and the heat dissipation fins of the finned bottom shell 17 are staggered to optimize the air convection heat dissipation efficiency.

[0044] Working principle:

[0045] In the first step, the fuel in the fuel tank 6 is delivered through the fuel supply module, the fuel injector body 8 is fixed by the fuel injector fixing screw 7, and the fuel inlet gasket 9 is used to ensure the sealed delivery of the fuel. The fuel is injected into the cylinder body 5 with heat dissipation fins through the fuel injector body 8, mixed with the air entering through the air inlet, forming a combustible mixture. The lubricating oil pipeline 10 delivers lubricating oil to each moving part of the engine to play a lubricating role. The piston body 13 moves in the cylinder sleeve 14, the piston pin 12 connects the piston body 13 and the transmission main shaft 11, the curved cam groove of the piston body 13 is in sliding fit with the cam pin 21 to guide the rotational movement of the piston. When the piston body 13 moves upward, the combustible mixture in the cylinder sleeve 14 is compressed. At this time, the CD I igniter 27 generates an electric spark through the spark plug 16, and the flywheel 3 with a magnet is connected with the CD I igniter 27 through the fastening screw 28. The rotation of the flywheel provides a trigger ignition signal to ignite the compressed combustible mixture.

[0046] The combustible mixture burns and expands, pushing the piston body 13 to move downward, driving the transmission main shaft 11 to rotate through the piston pin 12, realizing energy conversion and converting the internal energy generated by combustion into mechanical energy to output power for the engine. The wear-resistant bushing at the connecting part of the transmission main shaft 11 and the piston pin 12 improves the transmission reliability. When the piston body 13 approaches the bottom dead center, the exhaust port body 20 is fixed by the exhaust port fixing screw 19, and the exhaust port body 20 adopts a gradually expanding structure to reduce the exhaust back pressure. The exhaust gas after combustion is discharged from the cylinder body, and at the same time, fresh combustible mixture enters the cylinder body through the air inlet, completing the gas exchange process and preparing for the next working cycle.

[0047] In the second step, the transmission main shaft 11 rotates to drive the flywheel 3 with a magnet to rotate. The flywheel 3 with a magnet is stably installed on the engine through structures such as the fixed support 4. The propeller body 2 is fixed to one end of the transmission main shaft 11 through the propeller fixing screw 1. The power output by the engine is transmitted to the propeller body 2 through the transmission main shaft 11, so that the propeller body 2 rotates, thereby realizing power output.

[0048] During the working process, the cylinder body 5 with the heat dissipation fins and the heat dissipation fins of the bottom shell 17 are staggered, when the air flows through the heat dissipation fins, the heat generated by the engine is taken away by the convection heat dissipation mode, the engine is maintained in the appropriate working temperature range, the normal and stable operation of the engine is ensured, the bearing 26 ensures the smoothness of the rotation of the transmission components, the cam pin 21, the cam bushing 22, the cam cover gasket 23, the cam cover body 24 and the cam cover fixing screw 25 and other components jointly constitute the cam mechanism related part, cooperate with the movement of the piston, and ensure the orderly progress of the engine working cycle.

[0049] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the utility model, and are not limited to the implementation. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and also impossible to enumerate all the implementation. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A single-cylinder two-stroke cam-piston engine comprising a cylinder block (5) with cooling fins and an oil tank (6), characterized in that, The side end of the cylinder body (5) is provided with a motion assembly, which comprises a propeller fixing screw (1), a propeller body (2), a flywheel with magnet (3) and a fixing support (4), and further comprises; A power transmission assembly is arranged inside the cylinder body (5), which comprises a transmission main shaft (11), a piston pin (12), a piston body (13) and a cylinder sleeve (14), the side end of the cylinder sleeve (14) is provided with at least two bottom shell fixing screws (15), the side end of the cylinder sleeve (14) is provided with a spark plug (16), and the surface of the cylinder sleeve (14) is provided with a finned bottom shell (17). The surface of the cylinder body (5) is provided with a fuel supply module, which comprises an oil injector fixing screw (7), an oil injector body (8) and an oil inlet gasket (9), and the surface of the cylinder body (5) is provided with a lubricating oil pipeline (10).

2. A single cylinder two-stroke cam-piston engine as claimed in claim 1, characterized in that The surface of the cylinder body (5) is provided with an exhaust assembly, which comprises a wire (18), an exhaust port fixing screw (19) and an exhaust port body (20), and the exhaust port body (20) adopts a gradually expanding structure.

3. A single cylinder two-stroke cam-piston engine as claimed in claim 1, characterized in that The surface of the cylinder body (5) is provided with a cam pin (21), the end of the cam pin (21) is provided with a cam bushing (22), and the side end of the cam bushing (22) is provided with a cam cover gasket (23).

4. A one-cylinder two-stroke cam-piston engine according to claim 3, characterised in that The bottom end of the cam cover gasket (23) is provided with a cam cover body (24), and the end of the cam cover body (24) is provided with at least two cam cover fixing screws (25).

5. A one-cylinder two-stroke cam-piston engine according to claim 1, characterized in that The inner side of the cylinder body (5) is provided with a bearing (26), and the side end of the cylinder body (5) is provided with a CDI igniter (27).

6. A single cylinder two-stroke cam-piston engine as claimed in claim 1, characterized in that The side end of the flywheel with magnet (3) is provided with a fastening screw (28), the end of the fastening screw (28) is inserted into the CDI igniter (27), and the side end of the flywheel with magnet (3) is provided with a flywheel fixing nut (29).

7. A one-cylinder two-stroke cam-piston engine according to claim 1, characterized in that The curved cam groove of the piston body (13) is in sliding fit with the cam pin (21), and the cross section of the cam groove is in arc structure to guide the movement of the piston body (13).

8. A one-cylinder two-stroke cam-piston engine according to claim 1, characterised in that The connecting part of the transmission main shaft (11) and the piston pin (12) is provided with a wear-resistant bushing, and the cooling fins of the cylinder body (5) and the finned bottom shell (17) are staggered.

Images