Efficient, low-noise and reliable gas distribution device

Abstract

The invention discloses an efficient, low-noise and reliable air distribution device which comprises a cam shaft assembly and a cam shaft driving gear set. The cam shaft assembly is arranged in the air cylinder cover, and a cam part of the cam shaft assembly directly abuts against one end of the valve rocker assembly to drive the valve assembly at the other end of the valve rocker assembly to move. The cam shaft driving gear set is arranged in the cylinder cover and located at one end of the cylinder cover, and the cam shaft driving gear set transmits power of the transmission gear set located in the gear chamber to the cam shaft assembly. According to the efficient, low-noise and reliable air distribution device, the cam shaft is arranged in the air cylinder cover in an overhead mode, a tappet mechanism is omitted, direct contact between the cam shaft and the valve rocker arm is achieved, an adjusting gap of the valve rocker arm is abandoned, abrasion and maintenance adjustment are reduced, and high efficiency, low noise and reliability are achieved.

Description

Technical Field

[0001] This invention relates to the field of engine design and manufacturing, and in particular to a high-efficiency, low-noise, and reliable valve train. Background Technology

[0002] like Figures 1 to 7 As shown, the traditional engine valve train mainly consists of a transmission gear set 1, a camshaft 2, a tappet mechanism 3, a valve rocker arm 4, and a valve assembly 5.

[0003] from Figures 1 to 6 It can be observed that in traditional valve trains, the camshaft and valve rocker arms are far apart, requiring a long tappet mechanism to link the camshaft and valve rocker arms. Differences in tappet length and wear rate affect the consistency of power transmission, necessitating the use of adjusting bolts to adjust the clearance between each rocker arm and tappet. Furthermore, continued maintenance and adjustment are required after a period of use. The force transmitted by the tappet is also limited; high-power, high-pressure engines require even greater force transmission, where this limitation becomes particularly pronounced. The tappet mechanism also generates significant vibration, resulting in high noise and vibration throughout the engine.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency, low-noise, and reliable valve train. By placing the camshaft inside the cylinder head, the push-up mechanism is eliminated, allowing direct contact between the camshaft and the valve rocker arm. This eliminates the need for valve rocker arm adjustment clearance, reduces wear and maintenance, and achieves high efficiency, low noise, and high reliability.

[0006] To achieve the above objectives, the present invention provides a high-efficiency, low-noise, and reliable valve train, including a camshaft assembly and a camshaft drive gear set; the camshaft assembly is disposed within the cylinder head, and the cam portion of the camshaft assembly directly abuts against one end of the valve rocker arm assembly, driving the valve assembly at the other end of the valve rocker arm assembly to move; the camshaft drive gear set is disposed within the cylinder head and located at one end of the cylinder head, and the camshaft drive gear set transmits the power of the transmission gear set located in the gear chamber to the camshaft assembly.

[0007] In a preferred embodiment, the camshaft drive gear set comprises a camshaft drive gear and a drive transition gear; the camshaft drive gear is arranged in the cylinder block and at one end of the cylinder block, above the gear chamber, and is coaxially connected with the camshaft assembly; a part of the drive transition gear is arranged in the cylinder block and at one end of the cylinder block, and another part is arranged in the gear chamber and at the top of the gear chamber; the drive transition gear is engaged with both the camshaft drive gear and the drive gear set, and transmits the power of the drive gear set to the camshaft drive gear to drive the camshaft assembly to rotate.

[0008] In a preferred embodiment, the camshaft assembly comprises a plurality of cam sets arranged at intervals, each of which comprises an intake valve cam and an exhaust valve cam.

[0009] In a preferred embodiment, the number of cam sets matches the number of cylinders of the engine.

[0010] In a preferred embodiment, the camshaft assembly further comprises a support structure arranged at intervals with each cam set, and the support structure is a bearing assembly.

[0011] In a preferred embodiment, the drive gear set comprises a timing gear and an intermediate gear; the timing gear is arranged in the gear chamber and is coaxially connected with the engine crankshaft; the intermediate gear is arranged in the gear chamber and is engaged with both the timing gear and the drive transition gear.

[0012] Compared with the prior art, the high-efficiency, low-noise and reliable valve timing device has the following beneficial effects: the valve timing device ingeniously uses gear transmission to top the camshaft on the cylinder head, realizes the direct contact of the camshaft and the valve rocker arm, and replaces the transmission function of the tappet with the gear. The gear transmission uses the same gear, and the consistency is effectively guaranteed, and there is no need to adjust the gap of each valve rocker arm. The transmission torque of the gear is much larger than that of the tappet, which can meet the development requirements of large force distance of the engine. The noise of the gear is much smaller and more flexible than that of the tappet mechanism, which is very beneficial to the noise reduction and vibration of the whole machine. In addition, the gear has little wear and does not need maintenance and adjustment during the life cycle of the engine, realizing high efficiency, low noise and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective structural schematic view of a valve timing device according to an embodiment of the prior art from one viewing angle;

[0014] Figure 2 is a perspective structural schematic view of a valve timing device according to an embodiment of the prior art from another viewing angle;

[0015] Figure 3 is a left view structural schematic view of a valve timing device according to an embodiment of the prior art;

[0016] Figure 4 is a right side view of a gas distribution device according to an embodiment of the prior art;

[0017] Figure 5 is a front view of a gas distribution device according to an embodiment of the prior art;

[0018] Figure 6 is a perspective view of a gas distribution device according to an embodiment of the prior art from another angle;

[0019] Figure 7 is a perspective view of a gas distribution device and a cylinder head according to an embodiment of the prior art from one angle;

[0020] Figure 8 is a perspective view of an engine according to an embodiment of the present application from one angle;

[0021] Figure 9 is a perspective view of a gas distribution device according to an embodiment of the present application from one angle;

[0022] Figure 10 is a perspective view of a gas distribution device according to an embodiment of the present application from another angle;

[0023] Figure 11 is a right side view of a gas distribution device according to an embodiment of the present application;

[0024] Figure 12 is a front view of a gas distribution device according to an embodiment of the present application;

[0025] Figure 13 is a perspective view of a gas distribution device according to an embodiment of the present application from another angle.

[0026] Main reference numerals:

[0027] 10 - cylinder block, 20 - cylinder head, 30 - gear chamber, 40 - transmission gear set, 401 - timing gear, 402 - intermediate gear, 1 - camshaft drive gear set, 101 - camshaft drive gear, 102 - drive transition gear, 2 - camshaft assembly, 201 - cam set, 202 - support structure, 3 - valve rocker arm assembly, 4 - valve assembly. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will now be described in detail with reference to the accompanying drawings. However, the scope of protection of the present application is not limited by the specific embodiments.

[0029] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0030] like Figures 8 to 13 As shown, a high-efficiency, low-noise, and reliable valve train according to a preferred embodiment of the present invention includes a camshaft assembly 2 and a camshaft drive gear set 1. The camshaft assembly 2 is disposed within the cylinder head 20, and the cam portion of the camshaft assembly 2 directly abuts against one end of the valve rocker arm assembly 3, driving the valve assembly 4 at the other end of the valve rocker arm assembly 3 to move. The camshaft drive gear set 1 is disposed within the cylinder head 20 and located at one end of the cylinder head 20, and the camshaft drive gear set 1 transmits the power of the transmission gear set 40 located in the gear chamber 30 at the front of the cylinder block 10 to the camshaft assembly 2.

[0031] In some embodiments, the camshaft drive gear set 1 includes a camshaft drive gear 101 and a drive transition gear 102. The camshaft drive gear 101 is disposed inside the cylinder body 10 and located at one end of the cylinder body 10, and above the gear chamber 30. The camshaft drive gear 101 is coaxially connected to the camshaft assembly 2. A portion of the drive transition gear 102 is disposed inside the cylinder body 10 and located at one end of the cylinder body 10, and another portion is disposed inside the gear chamber 30 and located at the top of the gear chamber 30. The drive transition gear 102 meshes with both the camshaft drive gear 101 and the transmission gear set 40, and transmits the power of the transmission gear set 40 to the camshaft drive gear 101 to drive the camshaft assembly 2 to rotate.

[0032] In some embodiments, the camshaft assembly 2 includes a plurality of spaced-apart cam groups 201, each cam group 201 including an intake valve cam and an exhaust valve cam.

[0033] In some implementations, the number of cam sets 201 is matched with the number of cylinders in the engine.

[0034] In some embodiments, the camshaft assembly 2 further includes a support structure 202 spaced apart from each cam group 201, and the support structure 202 has a bearing assembly.

[0035] In some embodiments, the transmission gear set 40 includes a timing gear 401 and an intermediate gear 402; the timing gear 401 is disposed in the gear chamber 30 and is coaxially connected to the engine crankshaft; the intermediate gear 402 is disposed in the gear chamber 30 and meshes with both the timing gear 401 and the drive transition gear 102.

[0036] In summary, the high-efficiency, low-noise and reliable gas distribution device has the following advantages: the gas distribution device ingeniously places the camshaft on the cylinder head through gear transmission, realizes direct contact between the camshaft and the valve rocker arm, and replaces the transmission function of the tappet with the gear. The gear transmission uses the same gear, and the consistency is effectively guaranteed, and there is no need to adjust the gap of each valve rocker arm. The transmission torque of the gear is much larger than that of the tappet, and can meet the development requirements of the large force distance of the engine. The noise of the gear is much smaller than that of the tappet mechanism, and is much more flexible, which is very beneficial to the noise reduction and vibration of the whole machine. In addition, the gear wears very little, and does not need to be maintained and adjusted in the life cycle of the engine, realizing high efficiency, low noise and reliability.

[0037] The foregoing description of specific exemplary embodiments of the application is presented for the purpose of illustration and description. It is not intended to be a limitation on the present application, as described in the specification. Many changes, and variations will be apparent to those skilled in the art from the foregoing description, which is presented for purposes of illustration and explanation. The exemplary embodiments are chosen and described in order to explain the principles of the application and its practical application, and to enable others skilled in the art to understand its various exemplary embodiments and various permutations and combinations of the principles of the application. The scope of the application is intended to be defined by the claims and their equivalents.

Claims

1. A high-efficiency, low-noise, and reliable gas distribution device, characterized in that, include: A camshaft assembly, disposed within the cylinder head, wherein the cam portion of the camshaft assembly directly abuts against one end of a valve rocker arm assembly, driving the valve assembly at the other end of the valve rocker arm assembly to move; and A camshaft drive gear set is disposed within the cylinder head and located at one end of the cylinder head. The camshaft drive gear set transmits power from the transmission gear set located in the gear chamber to the camshaft assembly.

2. The high-efficiency, low-noise, and reliable gas distribution device as described in claim 1, characterized in that, The camshaft drive gear set includes: A camshaft drive gear is disposed within the cylinder body and located at one end of the cylinder body, above the gear chamber, and is coaxially connected to the camshaft assembly; and A drive transition gear is provided, with one part disposed in the cylinder body and located at one end of the cylinder body, and the other part disposed in the gear chamber and located at the top of the gear chamber. The drive transition gear meshes with both the camshaft drive gear and the transmission gear set, and transmits the power of the transmission gear set to the camshaft drive gear to drive the camshaft assembly to rotate.

3. The high-efficiency, low-noise, and reliable gas distribution device as described in claim 1, characterized in that, The camshaft assembly includes multiple spaced-apart cam groups, each cam group including an intake valve cam and an exhaust valve cam.

4. The high-efficiency, low-noise, and reliable gas distribution device as described in claim 3, characterized in that, The number of cam sets is matched to the number of cylinders in the engine.

5. The high-efficiency, low-noise, and reliable gas distribution device as described in claim 3, characterized in that, The camshaft assembly also includes a support structure spaced apart from each of the cam groups, the support structure bearing assembly.

6. The high-efficiency, low-noise, and reliable gas distribution device as described in claim 2, characterized in that, The transmission gear set includes: A timing gear, disposed in the gear housing, is coaxially connected to the engine crankshaft; and An intermediate gear is disposed in the gear chamber, and the intermediate gear meshes with both the timing gear and the drive transition gear.

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