Two-stage gear transmission valve mechanism and engine

Abstract

The utility model relates to a two-stage gear transmission valve mechanism which comprises a box body, a cam shaft and a tappet, the cam shaft and the tappet are arranged in the box body, the cam shaft is provided with an oil channel for lubricating liquid to flow, the tappet is arranged on the cam shaft, a containing groove for containing engine oil is arranged in the tappet, and the box body is provided with an overflow groove corresponding to the cam shaft. The overflow groove is used for containing redundant engine oil overflowing out of the box body. The cam shaft and the tappet are forcibly lubricated through the oil duct arranged on the cam shaft, redundant engine oil overflowing into the overflow groove can directly lubricate the outer circle of the tappet and the end face, making contact with the cam shaft, of the tappet, abrasion of the cam shaft and the tappet is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a valve train with two-stage gear transmission and an engine. Background Technique

[0002] The valve train is composed of some related components such as a camshaft, a tappet, a push rod, a rocker arm, a rocker shaft, a valve spring and a valve guide. The arrangement of the camshaft on the engine has a lower position, a side position and an overhead position. The overhead type is often adopted on modern engines, and it is located on the cylinder head. The camshaft directly drives the valve through the tappet, eliminating a large set of reciprocating components such as the tappet and the push rod, which is very suitable for high-speed engines, but it also brings difficulties in the transmission shaft. Since the camshaft is on the cylinder head, the disassembly and assembly of the cylinder head are more troublesome, and the arrangement of the fuel injector is also more difficult. Another overhead type is that the spoke wheel of the camshaft directly drives the valve. The advantages of this form are not only simple structure, small inertia and low requirements for the camshaft, so it is widely used in new cars.

[0003] However, in the existing valve train, during the operation of the engine, the camshaft and the tappet will inevitably experience friction and wear, especially under the conditions of high load, high speed and long-term continuous operation. If there are problems with the contact surface between the camshaft and the tappet, it will lead to insufficient valve opening or incomplete closing, further affecting the power performance and working efficiency of the engine.

[0004] Therefore, there is an urgent need for a valve train that can lubricate the camshaft and the tappet, reduce the wear of the camshaft and the tappet, and improve the service life of the camshaft and the tappet, which is an urgent technical problem to be solved at present. Content of the Utility Model

[0005] In view of this, the utility model provides a valve train with two-stage gear transmission, which lubricates the end face where the camshaft and the tappet contact with the excess oil overflowing from the box body, effectively reducing the wear of the camshaft and the tappet; the second object of the utility model is to provide an engine including the above-mentioned valve train with two-stage gear transmission.

[0006] The valve train with two-stage gear transmission provided by the utility model adopts the following technical scheme:

[0007] A valve train with two-stage gear transmission includes a box body, a camshaft and a tappet arranged in the box body. The camshaft is provided with an oil passage for the lubricating liquid to flow. The tappet is arranged on the camshaft. The tappet has a receiving groove for receiving engine oil. The box body is provided with an overflow groove corresponding to the camshaft. The overflow groove is used for receiving the excess oil overflowing from the box body, and the overflowing excess oil lubricates the outer circle of the tappet and the end face contacting the camshaft.

[0008] Optionally, the tappet is arranged on the camshaft along the upward or obliquely upward direction.

[0009] Optionally, the camshaft is provided with a cambered structure with equal widths on both sides.

[0010] Optionally, an oil sump for storing engine oil is provided on the housing, and the excess engine oil overflows into the overflow sump.

[0011] Optionally, the oil passage is opened at the center of the camshaft.

[0012] To achieve the above second objective, the present invention also provides an engine, which includes any of the above valve train mechanisms with two-stage gear transmission. Since the above valve train mechanism with two-stage gear transmission has the above technical effects, the engine with this valve train mechanism with two-stage gear transmission should also have corresponding technical effects.

[0013] In summary, the present invention includes at least one of the following beneficial technical effects: The camshaft and the tappet are forcedly lubricated through the oil passage provided on the camshaft, and the engine oil that overflows and accumulates in the overflow sump can directly lubricate the outer circumference of the tappet and the end face in contact with the camshaft, reducing the wear of the camshaft and the tappet and improving the service life. Description of the Drawings

[0014] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0016] Figure 2 is a side view of an embodiment of the present invention.

[0017] Description of the reference numerals: 1, housing; 2, camshaft; 3, tappet; 4, overflow sump; 5, receiving groove; 6, oil passage. Detailed Description of the Embodiments

[0018] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0019] The present invention will be further described in detail below with reference to the drawings.

[0020] An embodiment of the utility model discloses a valve distribution mechanism and an engine with two-stage gear transmission.

[0021] Referring to Figure 1 、 Figure 2 As shown in the figure, a valve distribution mechanism and an engine with two-stage gear transmission include a box body 1, a camshaft 2 and a tappet 3 arranged on the box body 1. An oil passage 6 for the flow of lubricating liquid is provided on the camshaft 2. The tappet 3 is arranged on the camshaft 2. An accommodation groove 5 for containing engine oil is provided inside the tappet 3. An overflow groove 4 is provided on the box body 1 corresponding to the camshaft 2. The overflow groove 4 is used to accommodate the excess engine oil overflowing from the box body 1. The camshaft 2 and the tappet 3 are lubricated forcibly through the oil passage 6 provided on the camshaft 2, and the engine oil that overflows into the overflow groove 4 can directly lubricate the outer circle of the tappet 3 and the end face in contact with the camshaft 2, reducing the wear of the camshaft 2 and the tappet 3 and improving the service life.

[0022] In this embodiment, the tappet 3 valve distribution mechanism of the prior art is borrowed. The components including the front and rear box bodies 1, the crankshaft, the timing drive gear, the timing idler gear, the gear shaft, the washer, the bolt, the timing driven gear, the tappet rod, the upper rocker arm assembly, the washer, the bolt, and the installed cylinder block assembly, cylinder head assembly, etc. all adopt the prior art and structure. The installation positions of the combination of the tappet 3 and the camshaft 2 with a pressure reducing valve are the same as those of the prior art, only the structures of the tappet 3 and the camshaft 2 are different. For the above prior art, it will not be elaborated one by one here.

[0023] In this embodiment, the tappet 3 is arranged upward or obliquely upward. An internally hollow structure that is assembled upward or obliquely upward is arranged inside the tappet 3, which can store a certain amount of engine oil for later cooling and lubrication, further reducing the wear of the camshaft 2 and the tappet 3 and further lubricating the camshaft 2 and the tappet 3, effectively ensuring the lubrication effect.

[0024] In this embodiment, the oil passage 6 is opened at the center of the camshaft 2. A pressure lubrication oil passage 6 is arranged at the center of the camshaft 2 to lubricate the camshaft 2 and the tappet 3 forcibly.

[0025] In this embodiment, the camshaft 2 is provided with a polishing rib structure with equal width on both sides and a complete top surface structure of the tappet 3. The polishing rib structure is in the shape of a polished and rounded edge without sharp edges, reducing the friction force of the contact surface between the two and effectively reducing the wear of the camshaft 2 and the tappet 3.

[0026] In this embodiment, an oil groove for storing engine oil is arranged on the box body 1. The excess engine oil overflows into the overflow groove 4, further lubricating the camshaft 2 and the tappet 3 and effectively reducing the wear of the camshaft 2 and the tappet 3.

[0027] The present utility model also provides an engine, which includes the valve mechanism with the two-stage gear drive described above. Since this engine adopts all the above technical solutions, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0028] Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be noted that due to the limited nature of literal expression and the objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements, modifications or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, modifications, changes or combinations, or directly applying the concept and technical solution of the utility model to other occasions without improvement, shall all be regarded as the protection scope of the present utility model.

Claims

1. A two-stage gear transmission valve mechanism, characterized in that: It includes a housing, a camshaft and a tappet arranged on the housing, the camshaft is provided with an oil passage for the flow of lubricating liquid, the tappet is arranged on the camshaft, the tappet has a receiving groove for receiving engine oil, the housing is provided with an overflow groove corresponding to the camshaft, the overflow groove is used to receive excess engine oil overflowing from the housing, and the overflow excess engine oil lubricates the outer circle of the tappet and the end face in contact with the camshaft.

2. The valve mechanism of the two-stage gear transmission according to claim 1, characterized in that: The tappet is arranged on the camshaft upward or obliquely upward.

3. The valve mechanism of the two-stage gear transmission according to claim 2, characterized in that: The camshaft is provided with a rounded edge structure with equal width on both sides.

4. The valve mechanism of the two-stage gear transmission according to claim 3, characterized in that: The box body is provided with an oil tank for storing engine oil, and excess engine oil overflows into the overflow tank.

5. The valve mechanism of the two-stage gear transmission according to claim 1, characterized in that: The oil passage is opened at the center of the camshaft.

6. An engine, characterized in that: The engine is equipped with a two-stage gear-driven valve mechanism as described in any one of claims 1 to 5.

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