Compact high-performance parallel double-cylinder engine

Abstract

The utility model discloses a compact high-performance parallel double-cylinder engine, which comprises an engine main body, a crankshaft assembly and a speed change assembly are symmetrically arranged in the engine main body, and a balance shaft assembly connected with the crankshaft assembly is arranged in the engine main body between the crankshaft assembly and the speed change assembly. A cylinder head is arranged at the top of the engine body, an air inlet assembly and an exhaust assembly are arranged on the cylinder head, a piston assembly connected with the crankshaft assembly is arranged in the cylinder head, a first transmission wheel and a second transmission wheel are rotationally arranged on the side wall of the engine body, the first transmission wheel is connected with the crankshaft assembly, and the second transmission wheel is connected with the second transmission wheel. The first transmission wheel is connected with a driving shaft in the speed change assembly, the second transmission wheel is connected with a driving shaft in the speed change assembly, and meanwhile the first transmission wheel and the second transmission wheel are sleeved with the transmission belt, so that the engine has the beneficial effects that the occupied space of the engine during installation is reduced, and the compactness of the engine is guaranteed.

Description

Technical Field

[0001] This utility model relates to a parallel twin-cylinder engine, and more particularly to a compact, high-performance parallel twin-cylinder engine. Background Technology

[0002] Parallel twin-cylinder engines typically consist of two cylinders arranged side-by-side in the same plane of the engine. This design makes the engine small in size and light in weight, allowing it to be better integrated into compact vehicles or equipment. At the same time, parallel twin-cylinder engines have become the first choice in the small and medium displacement field due to their balance, low cost and ease of maintenance, and they occupy an important position, especially in the motorcycle market.

[0003] In existing technologies, the engine is relatively large, thus requiring a large amount of space when installing the engine. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a compact, high-performance parallel twin-cylinder engine with a compact structure.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a compact high-performance parallel twin-cylinder engine, including an engine body, a crankshaft assembly disposed in the engine body, a cylinder head disposed on the top of the engine body, an intake assembly and an exhaust assembly disposed on the cylinder head, a piston assembly disposed in the cylinder head, and the piston assembly connected to the crankshaft assembly; a first transmission wheel, the first transmission wheel being rotatably mounted on the side wall of the engine body, the first transmission wheel being connected to the crankshaft assembly, and the crankshaft assembly controlling the rotation of the first transmission wheel; a transmission assembly, the transmission assembly being mounted in the engine body, and the transmission assembly being symmetrically arranged with the crankshaft assembly in the engine body; a second transmission wheel, the second transmission wheel being rotatably mounted on the side wall of the engine body, the second transmission wheel being connected to the drive shaft in the transmission assembly, and a transmission belt being sleeved on the first transmission wheel and the second transmission wheel; a balance shaft assembly, the balance shaft assembly being mounted in the engine body, the balance shaft assembly being located between the crankshaft assembly and the transmission assembly, and the balance shaft assembly being connected to the crankshaft assembly.

[0006] A further preferred embodiment of this utility model is that the cylinder head is tilted backward on the engine body.

[0007] A further preferred embodiment of this utility model is that the intake assembly is located at the front end of the cylinder head, and the exhaust assembly is located at the rear end of the cylinder head.

[0008] A further preferred embodiment of this utility model is: a protective cover is provided on the outer wall of the engine body to shield the first transmission wheel and the second transmission wheel.

[0009] A further preferred embodiment of this utility model is that the size of the first transmission wheel is smaller than the size of the second transmission wheel.

[0010] A further preferred embodiment of this utility model is as follows: an output shaft is provided in the engine body, the output shaft is connected to the transmission assembly, and the two ends of the output shaft pass out from the front and rear ends of the engine body, respectively.

[0011] A further preferred embodiment of this utility model is that the transmission belt is a CVT drive belt.

[0012] Compared with the prior art, the advantages of this utility model are that when the engine is in use, an external gearbox is no longer required, thereby reducing the space occupied by the engine during installation. Furthermore, the transmission assembly is symmetrically arranged with the crankshaft assembly in the engine body. At the same time, a balance shaft assembly for vibration damping is provided in the engine body between the crankshaft assembly and the transmission assembly. Thus, placing the balance shaft assembly between the crankshaft assembly and the transmission assembly can reduce the space occupied by the balance shaft assembly in the internal space of the engine body, thereby reducing the size of the engine body and further reducing the space occupied by the engine during installation, thus ensuring the compactness of the engine. Attached Figure Description

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0014] Figure 1 This is a front view of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0017] Figure 4 This is a three-dimensional structural diagram of the connection between the first transmission wheel and the second transmission wheel in this utility model;

[0018] Figure 5 This is an exploded view of the first and second transmission wheels and the protective cover in this utility model.

[0019] In the diagram: 1. Engine body; 2. Cylinder head; 3. Intake assembly; 4. Exhaust assembly; 5. Protective cover; 6. Crankshaft assembly; 7. Transmission assembly; 71. Drive shaft; 8. Balance shaft assembly; 9. Output shaft; 10. Piston assembly; 11. First drive pulley; 12. Second drive pulley; 13. Drive belt. Detailed Implementation

[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0021] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0022] This embodiment mainly describes the structure of a compact, high-performance parallel-twin engine, as follows:

[0023] like Figures 1-5 As shown, a compact high-performance parallel twin-cylinder engine includes an engine body 1, in which a crankshaft assembly 6 and a transmission assembly 7 are installed. This eliminates the need for an external gearbox during engine operation, reducing the space occupied during installation. The transmission assembly 7 is symmetrically positioned within the engine body 1 alongside the crankshaft assembly 6. A balance shaft assembly 8 for vibration damping is located between the crankshaft assembly 6 and the transmission assembly 7 within the engine body 1. This placement of the balance shaft assembly 8 between the crankshaft assembly 6 and the transmission assembly 7 reduces the space occupied by the balance shaft assembly 8 within the engine body 1, further reducing the overall size of the engine body 1 and thus minimizing the space required for installation. This ensures the engine's compactness.

[0024] Then, a cylinder head 2 is installed on the top of the engine body 1, and an intake assembly 3 and an exhaust assembly 4 are installed on the cylinder head 2. A piston assembly 10 connected to a crankshaft assembly 6 is installed in the cylinder head 2. When the piston assembly 10 is working, it drives the crankshaft assembly 6. Simultaneously, when the crankshaft assembly 6 is working, it drives the balance shaft assembly 8. To ensure the normal operation of the transmission assembly 7, a first transmission wheel 11 connected to the crankshaft assembly 6 is rotatably installed on the side wall of the engine body 1. Thus, when the crankshaft assembly 6... During operation, the first transmission wheel 11 can be driven to rotate. At the same time, a second transmission wheel 12, which is connected to the drive shaft 71 in the transmission assembly 7, is rotatably mounted on the side wall of the engine body 1. A transmission belt 13 is fitted on the first transmission wheel 11 and the second transmission wheel 12. When the first transmission wheel 11 rotates, it can drive the second transmission wheel 12 to rotate through the transmission belt 13. In this way, when the second transmission wheel 12 rotates, it can drive the drive shaft 71 in the transmission assembly 7 to rotate. When the drive shaft 71 rotates, the transmission assembly 7 can start to work.

[0025] Furthermore, in order to further reduce the size of the engine, the cylinder head 2 is tilted backward on the engine body 1, and the exhaust assembly 4 on the cylinder head 2 is located at the rear end of the cylinder head 2, while the intake assembly 3 is located at the front end of the cylinder head 2.

[0026] To improve the safety of the first transmission wheel 11 and the second transmission wheel 12 during rotation, a protective cover 5 is provided on the outer wall of the engine body 1 to shield the first transmission wheel 11 and the second transmission wheel 12.

[0027] Furthermore, in order to ensure the torque when the first transmission wheel 11 drives the second transmission wheel 12 to rotate, the size of the first transmission wheel 11 is smaller than the size of the second transmission wheel 12.

[0028] Furthermore, to ensure the reliability of the first transmission wheel 11 driving the second transmission wheel 12 to rotate, the transmission belt 13 is a CVT drive belt. In this way, when the first transmission wheel 11 drives the second transmission wheel 12 to rotate through the transmission belt 13, the power transmission can be continuous and smooth.

[0029] In order to ensure that the engine has a dual-drive effect, an output shaft 9 is provided in the engine body 1. The output shaft 9 is connected to the transmission assembly 7, and the two ends of the output shaft 9 pass out from the front and rear ends of the engine body 1 respectively.

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] The compact, high-performance parallel-twin engine provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A compact, high-performance parallel-twin engine, characterized in that: include An engine body, wherein a crankshaft assembly is disposed therein, a cylinder head is disposed on the top of the engine body, an intake assembly and an exhaust assembly are disposed on the cylinder head, a piston assembly is disposed in the cylinder head, and the piston assembly is connected to the crankshaft assembly; The first drive wheel is rotatably mounted on the side wall of the engine body and is connected to the crankshaft assembly, which controls the rotation of the first drive wheel. A transmission assembly, which is installed in the engine block and is symmetrically arranged with respect to the crankshaft assembly in the engine block; The second transmission wheel is rotatably mounted on the side wall of the engine body and is connected to the drive shaft in the transmission assembly. A transmission belt is fitted on the first and second transmission wheels. A balance shaft assembly is installed in the engine body, located between the crankshaft assembly and the transmission assembly, and connected to the crankshaft assembly.

2. The compact high-performance parallel-twin engine according to claim 1, characterized in that: The cylinder head is tilted backward on the engine body.

3. The compact high-performance parallel-twin engine according to claim 1, characterized in that: The intake assembly is located at the front end of the cylinder head, and the exhaust assembly is located at the rear end of the cylinder head.

4. The compact high-performance parallel-twin engine according to claim 1, characterized in that: The outer wall of the engine body is provided with a protective cover to shield the first and second drive wheels.

5. The compact high-performance parallel-twin engine according to claim 1, characterized in that: The size of the first transmission wheel is smaller than the size of the second transmission wheel.

6. The compact high-performance parallel-twin engine according to claim 1, characterized in that: An output shaft is provided in the engine body, and the output shaft is connected to the transmission assembly. The two ends of the output shaft extend out from the front and rear ends of the engine body, respectively.

7. The compact high-performance parallel-twin engine according to claim 1, characterized in that: The transmission belt is a CVT drive belt.

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