Light piston engine structure

Abstract

The utility model belongs to the technical field of engines, and particularly relates to a light piston engine structure. Comprising an engine shell, a cam shaft is installed on the lower portion of the engine shell, crank-link mechanisms are arranged on the cam shaft at intervals, the crank-link mechanisms are connected with piston bodies, piston rings capable of being automatically adjusted along with temperature are arranged on the piston bodies, and a box body is installed on the lower portion of the engine shell. The cylinder body is installed on the box body and communicated with the box body. During long-time operation, if the crank connecting rod body is fractured unfortunately, the auxiliary connecting structure formed by the mounting and rotating column and the connecting rod immediately plays a role to provide additional support and connection and prevent a crank and a piston from directly stopping operation, so that engine shutdown caused by sudden failure is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology, and in particular relates to a lightweight piston engine structure. Background Technology

[0002] A lightweight piston engine is a piston engine with a lightweight design. Its design goal is to reduce the overall weight of the engine while meeting the strength and rigidity requirements, by eliminating unnecessary parts and adopting new materials and processes. This type of engine is mainly used in light, low-speed aircraft, such as general aviation aircraft, light sport and experimental aircraft.

[0003] The crankshaft and piston in a lightweight piston engine are key components for energy conversion, and their performance directly affects the overall efficiency and reliability of the engine. The crankshaft and connecting rod are used to convert reciprocating motion into rotary motion. The crankshaft and connecting rod also bear significant loads and friction during operation, making them prone to wear and breakage. Therefore, it is essential to design a lightweight piston engine structure that reduces piston friction and extends the service life of the crankshaft and connecting rod. Utility Model Content

[0004] To overcome the shortcomings of crankshaft connecting rod pistons, which are used to convert reciprocating motion into rotary motion, and which are also subjected to large loads and friction during operation, thus easily leading to wear and breakage, the technical problem to be solved is to provide a lightweight piston engine structure that can reduce piston friction.

[0005] The technical implementation scheme of this utility model is as follows: A lightweight piston engine structure includes an engine housing, a housing, a cylinder block, a camshaft, an engine housing cover, a valve train, a crankshaft and connecting rod mechanism, and a piston body. A camshaft is installed at the lower part of the engine housing, and crankshaft and connecting rod mechanisms are spaced apart on the camshaft. Each crankshaft and connecting rod mechanism is connected to a piston body. The piston body is provided with piston rings that can adjust automatically according to temperature. A housing is installed at the lower part of the engine housing, and the cylinder blocks are installed on the housing and communicate with the housing. There are four cylinder blocks, all of which are horizontally arranged. The four cylinder blocks correspond one-to-one with the four piston bodies connected to the crankshaft and connecting rod mechanisms. The piston bodies slide in the corresponding cylinder blocks. Intake valves and exhaust valves are provided on the cylinder blocks. The engine housing cover includes a valve train mechanism corresponding to the combustion chamber, and a belt transmission assembly between the valve train camshaft and the end of the camshaft on the engine housing. The cylinder blocks cooperate with the valve train mechanism.

[0006] Optionally, the crank-connecting rod mechanism includes a crank-connecting rod body, a connecting rod cap, a connecting rod bolt, a swivel post, a connecting rod, and an annular bracket. The crank-connecting rod body and the connecting rod cap are assembled and installed on the camshaft and connected and fixed by the connecting rod bolt. The other end of the crank-connecting rod body is fixedly installed to the piston body by a piston pin. Swivel posts are provided on both sides of the crank-connecting rod body, and connecting rods are connected to the swivel posts. Annular grooves are symmetrically opened at the piston pin mounting holes of the crank-connecting rod body, and annular brackets are installed in each of the annular grooves. The annular brackets are connected to the connecting rods.

[0007] Optionally, an adjusting ring is installed in the piston ring groove on the piston body. The adjusting ring has a notch and an elastic ring is provided on the outer side of the adjusting ring. An annular groove is provided on the inner side of the piston ring, and the annular groove of the piston ring is engaged with the elastic ring of the adjusting ring.

[0008] Optionally, it also includes limit rings, with limit rings provided on both sides of the crank connecting rod body, and the limit rings being fixedly connected to the adjacent connecting rods.

[0009] Optionally, the elastic ring is a thermoelastic martensitic phase transformation memory metal.

[0010] Optionally, a transition fillet is provided at the top of the piston body's inner cavity.

[0011] The beneficial effects of this utility model are:

[0012] 1. During prolonged operation, if the crankshaft connecting rod body unfortunately breaks, the auxiliary connection structure composed of the swivel column and connecting rod will immediately come into play, providing additional support and connection to prevent the crankshaft and piston from stopping directly, thus avoiding engine shutdown due to sudden failure. Simultaneously, the robust connection between the two limit rings and the connecting rod and crankshaft connecting rod body further enhances the stability and safety of the structure. Even in the face of breakage risk, it effectively prevents the crankshaft connecting rod body from wobbling, ensuring the engine can continue to run. This design greatly improves the reliability and durability of the crankshaft connecting rod body, providing a solid guarantee for the long-term stable operation of the engine.

[0013] 2. The elastic rings, adjusting rings, and piston rings installed on the piston body maintain a tight fit between the piston body and the cylinder block. The elastic rings are made of thermoelastic martensitic phase transformation memory metal, whose elasticity characteristics significantly increase with increasing ambient temperature. When the engine cylinder block undergoes significant deformation due to high temperatures, the assembly of the elastic rings, adjusting rings, and piston rings automatically adjusts the total elasticity to accommodate the cylinder block deformation, maintaining a tight and reliable seal between the piston rings and the cylinder block. This optimizes the frictional power consumption of the internal combustion engine, ensures that emission standards meet stringent regulatory requirements, and guarantees the safe and stable operation of the engine. Attached Figure Description

[0014] Figure 1It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the installation structure of the crank-connecting rod mechanism of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the crank-connecting rod mechanism of this utility model.

[0018] Figure 5 This is an exploded structural diagram of the crank-connecting rod mechanism of this utility model.

[0019] Figure 6 This is an exploded structural diagram of the piston ring and adjusting ring of this utility model.

[0020] The labels in the diagram are as follows: 1_Engine housing, 2_Cylinder housing, 3_Cylinder block, 4_Camshaft, 5_Engine housing cover, 6_Valve train, 7_Crankshaft and connecting rod mechanism, 71_Crankshaft and connecting rod body, 72_Connecting rod cap, 73_Connecting rod bolt, 74_Rotor column, 75_Connecting rod, 76_Annular groove, 77_Annular bracket, 8_Piston body, 9_Piston pin, 10_Limit ring, 11_Adjusting ring, 111_Elastic ring, 12_Piston ring, 121_Annular groove. Detailed Implementation

[0021] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] Example: Figure 1-6As shown, a lightweight piston engine structure includes an engine housing 1, a casing 2, a cylinder block 3, a camshaft 4, an engine cover 5, a valve train 6, a crankshaft and connecting rod mechanism 7, a piston body 8, a piston pin 9, and a retaining ring 10. The camshaft 4 is mounted on the lower part of the engine housing 1. Crankshaft and connecting rod mechanisms 7 are spaced apart on the camshaft 4, and each crankshaft and connecting rod mechanism 7 is connected to the piston body 8. The top of the inner cavity of the piston body 8 has a rounded corner to allow heat to be transferred more smoothly to the lower ring grooves and oil rings, reducing temperature accumulation in the upper ring grooves and lowering the maximum temperature of the piston head. An adjusting ring 1 is installed in the ring grooves of the piston body 8. 1. The adjusting ring 11 has a notch, and an elastic ring 111 is provided on the outer side of the adjusting ring 11. The piston ring 12 has an annular groove 121 on the inner side. The annular groove 121 of the piston ring 12 is engaged with the elastic ring 111 of the adjusting ring 11. The elastic ring 111 is a thermoelastic martensitic phase transformation memory metal. Under the force of the elastic ring 111, the piston ring 12 can deform towards the outer annular surface of the piston ring 12. A housing 2 is installed at the lower part of the engine housing 1. The cylinder block 3 is installed on the housing 2 and communicates with the housing 2. There are four cylinder blocks 3, and all four cylinder blocks 3 are arranged horizontally. The four cylinder blocks 3 correspond one-to-one with the piston bodies 8 connected to the four crank connecting rod mechanisms 7. The engine block 8 slides within the corresponding cylinder block 3. The cylinder block 3 has intake and exhaust valves. The engine cover 5 includes a corresponding valve train 6 for the combustion chamber, and a belt transmission assembly between the camshaft of the valve train 6 and the end of the camshaft 4 on the engine cover 1. The belt in the belt transmission assembly is a timing belt. The valve train 6 consists of a double overhead camshaft and the intake and exhaust valves of the cylinder block 3. Power is transmitted through the belt transmission assembly and cooperates with the cylinder block 3 to achieve the intake and exhaust strokes of the engine. The cylinder block 3 cooperates with the valve train 6. The crankshaft connecting rod mechanism 7 includes a crankshaft connecting rod body 71, a connecting rod cap 72, a connecting rod bolt 73, a swivel column 74, a connecting rod 75, and... The ring frame 77, crank connecting rod body 71, and connecting rod cover 72 are assembled and installed on the camshaft 4 and connected and fixed by connecting rod bolts 73. The other end of the crank connecting rod body 71 is fixedly installed to the piston body 8 by piston pin 9. The crank connecting rod body 71 has a rotating post 74 on both sides of its side wall, and the rotating post 74 is connected to the connecting rod 75. The crank connecting rod body 71 has symmetrically opened annular grooves 76 at the through holes of the piston pin 9. The annular frame 77 is installed in each annular groove 76 and is connected to the connecting rod 75. The crank connecting rod body 71 has a limit ring 10 on both sides of its side wall, and the limit ring 10 is fixedly connected to the adjacent connecting rod 75.

[0023] An electric motor mounted on the engine housing 1 drives the internally mounted camshaft 4 to rotate, which in turn drives the crankshaft and connecting rod mechanism 7. The crankshaft and connecting rod mechanism 7 is connected to the piston body 8, which in turn causes the piston body 8 to move back and forth within the cylinder block 3. When the ambient temperature rises, the engine block 3 will deform significantly. The elastic force of the elastic ring 111 also increases with the temperature of the cylinder block 3. Therefore, the total elastic force of the assembly of the elastic ring 111, adjusting ring 11, and piston ring 12 is large, which can adapt to the deformation of the engine block 3, maintain the sealed connection between the piston ring 12 and the engine block 3, effectively improve the friction work of the internal combustion engine, ensure that emissions meet regulatory requirements and the normal and safe operation of the engine, optimize the fit clearance between the piston and the cylinder wall, improve its sealing performance and reduce frictional resistance. If the crank connecting rod body 71 breaks during long-term operation, the presence of the rotating column 74 and the connecting rod 75 can provide further connection, preventing the crank and piston from stopping directly. The two limit rings 10 are connected to the connecting rod 75 and the crank connecting rod body 71, which also prevents the broken crank connecting rod body 71 from swinging, enabling the engine to run and improving the reliability and durability of the crank connecting rod body 71. The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A lightweight piston engine structure, characterized by: The engine includes an engine housing (1), a camshaft (4) mounted on the lower part of the engine housing (1), crankshaft (4) with connecting rod mechanisms (7) spaced apart, each connecting rod mechanism (7) connected to a piston body (8), the piston body (8) being provided with piston rings (12) that can adjust with temperature, a housing (2) mounted on the lower part of the engine housing (1), cylinder blocks (3) mounted on the housing (2) and communicating with the housing (2), four cylinder blocks (3), all four cylinder blocks (3) are horizontally arranged, the four cylinder blocks (3) correspond one-to-one with the four piston bodies (8) connected to the crankshaft connecting rod mechanisms (7), the piston bodies (8) slide in the corresponding cylinder blocks (3), the cylinder blocks (3) are provided with intake valves and exhaust valves, the engine cover (5) includes a corresponding valve train (6) for the combustion chamber, and the valve train (6) The camshaft of the cylinder block (3) is connected to the end of the camshaft (4) on the engine housing (1) via a belt transmission assembly. The cylinder block (3) is connected to the valve train (6). The crank connecting rod mechanism (7) includes a crank connecting rod body (71). The crank connecting rod body (71) and the connecting rod cap (72) are assembled and installed on the camshaft (4) and connected and fixed by connecting rod bolts (73). The other end of the crank connecting rod body (71) is fixedly installed to the piston body (8) by a piston pin (9). The crank connecting rod body (71) has a rotating post (74) on each of its two side walls. The rotating post (74) is connected to a connecting rod (75). The crank connecting rod body (71) has symmetrically opened annular grooves (76) at the through hole position of the piston pin (9). Annular brackets (77) are installed in the annular grooves (76). The annular brackets (77) are connected to the connecting rods (75).

2. The lightweight piston engine structure according to claim 1, characterized in that: An adjusting ring (11) is installed in the gas ring groove on the piston body (8). The adjusting ring (11) has a notch. An elastic ring (111) is provided on the outside of the adjusting ring (11). An annular groove (121) is provided on the inside of the piston ring (12). The annular groove (121) of the piston ring (12) is engaged with the elastic ring (111) of the adjusting ring (11).

3. The lightweight piston engine structure according to claim 2, characterized in that: It also includes a limiting ring (10), which is provided on both sides of the crank connecting rod body (71), and the limiting ring (10) is fixedly connected to the adjacent connecting rod (75).

4. The lightweight piston engine structure according to claim 3, characterized in that: The elastic ring (111) is a thermoelastic martensitic phase transformation memory metal.

5. The lightweight piston engine structure according to claim 4, characterized in that: The piston body (8) has a transition fillet at the top of its inner cavity.

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