Valve cam shaft of engine, engine and vehicle

Abstract

The invention discloses a gas distribution cam shaft of an engine, the engine and a vehicle, and relates to the technical field of cam shafts, the gas distribution cam shaft is characterized in that a plurality of cam units are formed on the side wall of a cam shaft body, the cam units are sequentially arranged at intervals in the axial direction of the cam shaft body, and each cam unit comprises a balance block and two cam structures; the two cam structures of each cam unit are spaced in the axial direction of the cam shaft body, and the balance block is arranged between the two cam structures of the corresponding cam unit so that the gravity center of the corresponding cam unit can coincide with the central axis of the cam shaft body. Therefore, the gravity center of the cam unit coincides with the central axis of the cam shaft body, the unbalanced weight of the cam structure can be balanced, the rotating mass balance of the gas distribution cam shaft can be achieved, it can be guaranteed that vibration of the gas distribution cam shaft is reduced in the high-speed running process, and therefore the service life of parts such as a timing system can be prolonged; and the noise of an engine timing system can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a valve distribution camshaft of an engine, an engine and a vehicle. Background Art

[0002] In the related technology, the valve timing depends on the movement law of the valve camshaft. The front end of the valve camshaft is connected to the timing system through the timing gear. However, the existing valve camshaft structure has an unbalanced force due to the deviation of the center of gravity of the cam part from the central axis. During high-speed operation, it will cause a large camshaft angular vibration, which will cause abnormal force on the timing system and produce large vibrations, affecting the service life of the timing system components and causing the timing system to produce large noise. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a valve camshaft of an engine, which can balance the unbalanced weight of the valve camshaft to balance the rotating mass of the valve camshaft, thereby ensuring that the vibration of the valve camshaft is reduced during high-speed operation, thereby increasing the service life of components such as the valve camshaft and the timing system, and is also conducive to reducing the noise of the engine timing system.

[0004] The present invention further provides an engine having the above-mentioned valve distribution camshaft.

[0005] The present invention further provides a vehicle having the above engine.

[0006] A valve timing camshaft for an engine according to an embodiment of the present invention comprises: a camshaft body, a side wall of the camshaft body being formed with a plurality of cam units, the plurality of cam units being arranged in sequence and spaced apart along the axial direction of the camshaft body, the cam units comprising a balancing block and two cam structures, the two cam structures of each cam unit being spaced apart along the axial direction of the camshaft body, the balancing block being arranged between the two cam structures of the corresponding cam unit so that the center of gravity of the corresponding cam unit coincides with the central axis of the camshaft body.

[0007] According to the valve timing camshaft of the engine according to the embodiment of the present invention, a plurality of cam units are formed on the side wall of the camshaft body, and the plurality of cam units are arranged in sequence and spaced apart along the axial direction of the camshaft body. The cam units include a balancing block and two cam structures. The two cam structures of each cam unit are spaced apart along the axial direction of the camshaft body. The balancing block is arranged between the two cam structures of the corresponding cam unit so that the center of gravity of the corresponding cam unit coincides with the central axis of the camshaft body, and the unbalanced weight of the corresponding cam structure can be balanced, thereby achieving the rotational mass balance of the valve timing camshaft, and further ensuring that the vibration of the valve timing camshaft is reduced during high-speed operation, thereby improving the service life of components such as the valve timing camshaft and the timing system, and is also beneficial to reducing the noise of the engine timing system.

[0008] According to some embodiments of the present invention, the balancing block is fixedly connected to the camshaft body; and / or

[0009] The balancing block is fixedly connected to the corresponding cam structure.

[0010] According to some embodiments of the present invention, the balancing block is integrally formed with the camshaft body; and / or

[0011] The balancing block and the corresponding cam structure are integrally formed.

[0012] According to some embodiments of the present invention, the balancing block is arc-shaped, and the shape of the balancing block is adapted to the shape of the camshaft body.

[0013] According to some embodiments of the present invention, the cam structure is arranged around the camshaft body along the circumference of the camshaft body, the two cam structures of each cam unit are formed with cam portions, the cam portions of the two cam structures of each cam unit are located on the same side of the camshaft body, and the cam portions of the two cam structures of each cam unit are opposite to each other along the axial direction of the camshaft body, and along the radial direction of the camshaft body, the balancing block is located on the side of the camshaft body away from the corresponding cam portion.

[0014] According to some embodiments of the present invention, along the radial direction of the camshaft body, the outer surface of the balancing weight is coplanar with the outer surface of the corresponding cam structure.

[0015] The engine according to the embodiment of the present invention comprises: an intake-side camshaft and an exhaust-side camshaft, and at least one of the intake-side camshaft and the exhaust-side camshaft is the valve timing camshaft of the engine in the above embodiment.

[0016] According to some embodiments of the present invention, the engine also includes: a crankshaft, a first gear and a second gear, the first gear and the second gear are meshed, the intake side camshaft is transmission connected to one of the first gear and the second gear, the exhaust side camshaft is transmission connected to the other of the first gear and the second gear, and the first gear is transmission connected to the crankshaft.

[0017] According to some embodiments of the present invention, the engine also includes: a chain, the first gear forms a gear sprocket, the crankshaft forms a crankshaft sprocket, the chain is sleeved on the outside of the gear sprocket and the crankshaft sprocket, and the chain is transmission-connected to the gear sprocket and the crankshaft sprocket.

[0018] A vehicle according to an embodiment of the present invention includes the engine of the above embodiment.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a schematic diagram of the position distribution of the valve camshaft, the first gear and the second gear in an embodiment of the present invention.

[0022] Reference numerals:

[0023] Valve camshaft 100;

[0024] Camshaft body 10;

[0025] Cam unit 20; balancing block 21; cam structure 22; cam portion 23;

[0026] Intake side camshaft 30;

[0027] Exhaust side camshaft 40;

[0028] A first gear 50 ; a second gear 51 . DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] Reference below Figure 1 A valve timing camshaft 100 of an engine, an engine, and a vehicle according to an embodiment of the present invention will be described.

[0031] like Figure 1As shown, the valve timing camshaft 100 of the engine according to the embodiment of the present invention comprises: a camshaft body 10, a plurality of cam units 20 are formed on the side wall of the camshaft body 10, the plurality of cam units 20 are arranged in sequence and spaced apart along the axial direction of the camshaft body 10, the cam units 20 comprise a balancing block 21 and two cam structures 22, the two cam structures 22 of each cam unit 20 are spaced apart along the axial direction of the camshaft body 10, the balancing block 21 is arranged between the two cam structures 22 of the corresponding cam unit 20, so that the center of gravity of the corresponding cam unit 20 coincides with the central axis of the camshaft body 10.

[0032] Among them, the engine's valve camshaft 100 includes: a camshaft body 10, which is a cylinder with the same or approximately the same length as the cylinder group, and the camshaft body 10 can be made of metal material, for example: the camshaft body 10 can be made of alloy steel material, which can meet the strength and support requirements of the camshaft body 10, thereby reducing the risk of bending and deformation of the camshaft body 10, and further improving the accuracy of the valve timing of the timing system.

[0033] The side wall of the camshaft body 10 is formed with a plurality of cam units 20. For example, the side wall of the camshaft body 10 may be formed with two, three, four, or other cam units 20, but the present invention is not limited thereto. The side wall of the camshaft body 10 may also be formed with other numbers of cam units 20, as long as the side wall of the camshaft body 10 is formed with a plurality of cam units 20. The side wall of the camshaft body 10 is formed with a plurality of cam units 20 to control the opening and closing of the intake valve and the exhaust valve, thereby ensuring that the valves maintain regular motion.

[0034] A plurality of cam units 20 are arranged in sequence and spaced apart along the axial direction of the camshaft body 10. The plurality of cam units 20 can be evenly arranged along the axial direction of the camshaft body 10. The cam unit 20 includes a balancing block 21 and two cam structures 22. The two cam structures 22 of each cam unit 20 are spaced apart along the axial direction of the camshaft body 10. The balancing block 21 is arranged between the two cam structures 22 of the corresponding cam unit 20 so that the center of gravity of the corresponding cam unit 20 coincides with the central axis of the camshaft body 10, and the unbalanced weight of the corresponding cam structure 22 can be balanced, so as to achieve the rotational mass balance of the valve timing camshaft 100, and further ensure that the vibration of the valve timing camshaft 100 is reduced during high-speed operation, thereby improving the service life of components such as the valve timing camshaft 100 and the timing system, and is also beneficial to reducing the noise of the engine timing system.

[0035] According to the engine's valve timing camshaft 100 according to the embodiment of the present invention, a plurality of cam units 20 are formed on the side wall of the camshaft body 10. The plurality of cam units 20 are arranged in sequence and spaced apart along the axial direction of the camshaft body 10. The cam units 20 include a balancing block 21 and two cam structures 22. The two cam structures 22 of each cam unit 20 are spaced apart along the axial direction of the camshaft body 10. The balancing block 21 is arranged between the two cam structures 22 of the corresponding cam unit 20 so that the center of gravity of the corresponding cam unit 20 coincides with the central axis of the camshaft body 10, and the unbalanced weight of the corresponding cam structure 22 can be balanced, so as to achieve the rotational mass balance of the valve timing camshaft 100, and further ensure that the vibration of the valve timing camshaft 100 is reduced during high-speed operation, thereby improving the service life of components such as the valve timing camshaft 100 and the timing system, and is also beneficial to reducing the noise of the engine timing system.

[0036] According to some embodiments of the present invention, Figure 1 As shown, the balancing block 21 is fixedly connected to the camshaft body 10 ; and / or the balancing block 21 is fixedly connected to the corresponding cam structure 22 .

[0037] Among them, as an embodiment of the present application, the balancing block 21 is fixedly connected to the camshaft body 10, for example: the balancing block 21 and the camshaft body 10 can be fixedly connected by welding, or the balancing block 21 and the camshaft body 10 are integrally formed, but the present invention is not limited to this, the balancing block 21 and the camshaft body 10 can also be fixedly connected by other means, as long as the balancing block 21 and the camshaft body 10 are fixedly connected.

[0038] As another embodiment of the present application, the balancing block 21 is fixedly connected to the corresponding cam structure 22. For example, the balancing block 21 and the corresponding cam structure 22 can be fixedly connected by welding, or the balancing block 21 and the corresponding cam structure 22 can be integrally formed, but the present invention is not limited to this. The balancing block 21 and the corresponding cam structure 22 can also be fixedly connected by other means, as long as the balancing block 21 and the corresponding cam structure 22 are fixedly connected.

[0039] The present application is explained by taking the example in which the balancing block 21 is fixedly connected to the camshaft body 10 and the corresponding cam structure 22. Therefore, by fixing the balancing block 21 to the camshaft body 10 and the corresponding cam structure 22, and the balancing block 21 is arranged between the two cam structures 22 of the corresponding cam unit 20, the center of gravity of the corresponding cam unit 20 and the central axis of the camshaft body 10 can be coincident, and the unbalanced weight of the cam structure 22 can be further balanced, so as to further achieve the rotational mass balance of the valve timing camshaft 100, and further ensure that the vibration of the valve timing camshaft 100 is reduced during high-speed operation, so as to further improve the service life of components such as the timing system, and is also conducive to further reducing the noise of the engine timing system.

[0040] According to some embodiments of the present invention, the balancing block 21 is integrally formed with the camshaft body 10 ; and / or the balancing block 21 is integrally formed with the corresponding cam structure 22 .

[0041] Among them, the balancing block 21 can be integrally formed with the camshaft body 10, or the balancing block 21 can be integrally formed with the corresponding cam structure 22, or the balancing block 21, the camshaft body 10, and the corresponding cam structure 22 can be integrally formed. It can be reasonably set according to the actual situation, as long as it can meet the working requirements of the valve timing camshaft 100. This application takes the integral forming of the balancing block 21 and the camshaft body 10 as an example for explanation. Such a setting can make it possible to set no additional connecting parts between the balancing block 21 and the camshaft body 10, reduce the number of parts that may need to be replaced or adjusted during maintenance, and avoid assembly errors and failures between the balancing block 21 and the camshaft body 10, which helps to reduce maintenance costs and extend the service life of the equipment. It can also improve the overall stiffness and strength of the balancing block 21 and the camshaft body 10, thereby reducing the vibration and noise generated by the valve timing camshaft 100 during operation and improving the safety and reliability of the valve timing camshaft 100.

[0042] According to some embodiments of the present invention, Figure 1 As shown, the balancing block 21 can be arc-shaped, and the shape of the balancing block 21 can be adapted to the shape of the camshaft body 10, so that the connection between the inner arc surface of the balancing block 21 and the camshaft body 10 is more compact, thereby making the center of gravity of the balancing block 21 closer to the camshaft body 10, reducing the centrifugal force applied to the balancing block 21 due to the high-speed rotation of the valve camshaft 100, and further reducing the vibration of the camshaft.

[0043] According to some embodiments of the present invention, Figure 1As shown, the cam structure 22 is arranged around the camshaft body 10 along the circumference of the camshaft body 10, and the two cam structures 22 of each cam unit 20 are formed with a cam portion 23. The cam portions 23 of the two cam structures 22 of each cam unit 20 are located on the same side of the camshaft body 10, and the cam portions 23 of the two cam structures 22 of each cam unit 20 are opposite to each other along the axial direction of the camshaft body 10. Along the radial direction of the camshaft body 10, the balancing block 21 is located on the side of the camshaft body 10 away from the corresponding cam portion 23.

[0044] Among them, the cam structure 22 can be arranged around the camshaft body 10 along the circumference of the camshaft body 10, and the two cam structures 22 of each cam unit 20 are formed with a cam portion 23, and the contour shape of the cam portion 23 can be reasonably set according to actual conditions, for example: the cam portion 23 can be disc-shaped, elliptical, etc.

[0045] The cam portions 23 of the two cam structures 22 of each cam unit 20 are located on the same side of the camshaft body 10, and the cam portions 23 of the two cam structures 22 of each cam unit 20 are opposite to each other along the axial direction of the camshaft body 10. Such an arrangement can make the structure of the valve timing camshaft 100 more compact and reduce the installation space required for the valve timing camshaft 100.

[0046] Along the radial direction of the camshaft body 10, the balancing block 21 is located on the side of the camshaft body 10 away from the corresponding cam portion 23, which can balance the inertial force and vibration generated by the rotation of the corresponding cam portion 23, thereby enhancing the stability and reliability of the valve timing camshaft 100, and further reducing the vibration and impact generated by the valve timing camshaft 100 during operation. It can also reduce the noise and wear of the valve timing camshaft 100 during operation, thereby improving the service life of components such as the valve timing camshaft 100 and the timing system.

[0047] According to some embodiments of the present invention, Figure 1 As shown, along the radial direction of the camshaft body 10, the outer surface of the balancing block 21 can be coplanar with the outer surface of the corresponding cam structure 22, so that the balancing block 21 is flush with the corresponding cam structure 22, which can make the valve timing camshaft 100 more stable during operation, thereby reducing vibration, impact and noise caused by unevenness or misalignment, and further improving the performance and stability of the valve timing camshaft 100.

[0048] According to an embodiment of the present invention, the engine includes: an intake side camshaft 30 and an exhaust side camshaft 40, at least one of the intake side camshaft 30 and the exhaust side camshaft 40 is the valve timing camshaft 100 of the engine of the above embodiment, for example: the intake side camshaft 30 is the valve timing camshaft 100 of the engine of the above embodiment, or the exhaust side camshaft 40 is the valve timing camshaft 100 of the engine of the above embodiment, or both the intake side camshaft 30 and the exhaust side camshaft 40 are the valve timing camshaft 100 of the engine of the above embodiment. The present application is described by taking the intake side camshaft 30 and the exhaust side camshaft 40 as an example of the valve timing camshaft 100 of the engine of the above embodiment.

[0049] Therefore, setting the intake-side camshaft 30 and the exhaust-side camshaft 40 of the engine as the valve camshaft 100 of the engine in the above-mentioned embodiment can effectively balance the unbalanced weight of the cam structure 22, thereby achieving the rotational mass balance of the valve camshaft 100, and further effectively ensuring that the vibration of the valve camshaft 100 is reduced during high-speed operation, thereby effectively improving the service life of components such as the timing system, and is also beneficial to reducing the noise of the engine timing system.

[0050] According to some embodiments of the present invention, Figure 1 As shown, the engine may also include: a crankshaft, a first gear 50 and a second gear 51, the first gear 50 and the second gear 51 are meshed, the intake side camshaft 30 is transmission connected to one of the first gear 50 and the second gear 51, the exhaust side camshaft 40 is transmission connected to the other of the first gear 50 and the second gear 51, and the first gear 50 is transmission connected to the crankshaft.

[0051] The engine may further include: a crankshaft, a first gear 50 and a second gear 51, the first gear 50 and the second gear 51 are meshed, the intake side camshaft 30 is connected to one of the first gear 50 and the second gear 51 by transmission, and the exhaust side camshaft 40 is connected to the other of the first gear 50 and the second gear 51 by transmission. The present application takes the intake side camshaft 30 connected to the first gear 50 by transmission, and the exhaust side camshaft 40 connected to the second gear 51 by transmission as an example for explanation, thereby enabling the intake side camshaft 30 and the exhaust side camshaft 40 to adopt gear meshing transmission, which can greatly shorten the horizontal arrangement space, thereby enabling the structure of the valve timing camshaft 100 to be more compact. Furthermore, the first gear 50 is connected to the crankshaft by transmission, so that the intake side camshaft 30 can be driven by the crankshaft, which can reduce the reciprocating motion mass of the valve transmission mechanism, thereby enabling the valve timing camshaft 100 to adapt to a higher speed engine.

[0052] According to some embodiments of the present invention, the engine may further include: a chain, the first gear 50 is formed with a gear sprocket, the crankshaft is formed with a crankshaft sprocket, the chain is sleeved on the outside of the gear sprocket and the crankshaft sprocket, and the chain is drivingly connected to the gear sprocket and the crankshaft sprocket, so that the crankshaft sprocket can drive the chain to transmit power to the intake side camshaft 30. Such an arrangement can shorten the length of the chain, and the short chain has good high-speed movement ability, thereby providing higher timing accuracy, and the chain is drivingly connected to the gear sprocket and the crankshaft sprocket, has high reliability and durability, and can operate stably under harsh working environments such as large loads and impact loads, thereby improving the service life of the engine.

[0053] The vehicle according to the embodiment of the present invention, including the engine of the above embodiment, can balance the unbalanced weight of the cam structure 22, so as to achieve the rotational mass balance of the valve timing camshaft 100, and further ensure that the vibration of the valve timing camshaft 100 is reduced during high-speed operation, thereby improving the service life of components such as the timing system, and is also beneficial to reducing the noise of the engine timing system.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the 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 claims and their equivalents.

Claims

1. A valve camshaft for an engine, characterized in that: include: A camshaft body, wherein a plurality of cam units are formed on the side wall of the camshaft body, wherein the plurality of cam units are spaced apart in sequence along the axial direction of the camshaft body, wherein the cam units include a balancing block and two cam structures, wherein the two cam structures of each cam unit are spaced apart along the axial direction of the camshaft body, and the balancing block is arranged between the two cam structures of the corresponding cam unit so that the center of gravity of the corresponding cam unit coincides with the central axis of the camshaft body.

2. The camshaft of the engine according to claim 1, characterized in that: The balancing block is fixedly connected to the camshaft body; and / or The balancing block is fixedly connected to the corresponding cam structure.

3. The camshaft of the engine according to claim 1, characterized in that: The balancing block is integrally formed with the camshaft body; and / or The balancing block and the corresponding cam structure are integrally formed.

4. The camshaft of the engine according to claim 1, characterized in that: The balancing block is arc-shaped, and the shape of the balancing block is adapted to the shape of the camshaft body.

5. The camshaft of an engine according to any one of claims 1 to 4, characterized in that: The cam structure is arranged around the camshaft body along the circumference of the camshaft body, and the two cam structures of each cam unit are formed with a cam portion. The cam portions of the two cam structures of each cam unit are located on the same side of the camshaft body, and the cam portions of the two cam structures of each cam unit are opposite to each other along the axial direction of the camshaft body. Along the radial direction of the camshaft body, the balancing block is located on the side of the camshaft body away from the corresponding cam portion.

6. The valve timing camshaft of the engine according to claim 5, characterized in that: Along the radial direction of the camshaft body, the outer surface of the balancing block is coplanar with the outer surface of the corresponding cam structure.

7. An engine, characterized in that: include: An intake-side camshaft and an exhaust-side camshaft, at least one of the intake-side camshaft and the exhaust-side camshaft is a valve timing camshaft of an engine according to any one of claims 1-6.

8. The engine according to claim 7, characterized in that Also includes: A crankshaft, a first gear and a second gear, the first gear and the second gear are meshed, the intake side camshaft is transmission connected to one of the first gear and the second gear, the exhaust side camshaft is transmission connected to the other of the first gear and the second gear, and the first gear is transmission connected to the crankshaft.

9. The engine according to claim 8, characterized in that Also includes: The first gear is formed with a gear sprocket, the crankshaft is formed with a crankshaft sprocket, the chain is sleeved on the outside of the gear sprocket and the crankshaft sprocket, and the chain is drivingly connected with the gear sprocket and the crankshaft sprocket.

10. A vehicle, characterized in that: Comprising an engine according to any one of claims 7-9.

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