CN215927502U

CN215927502U - Valve mechanism and engine

Info

Publication number: CN215927502U
Application number: CN202121088432.4U
Authority: CN
Inventors: 高坤; 陈琳; 孟丽; 莫文超; 马庆镇; 张超
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-03-01
Anticipated expiration: 2031-05-20

Abstract

The utility model relates to the technical field of engines, in particular to a valve actuating mechanism and an engine, wherein the valve actuating mechanism comprises a valve component, and the valve component is arranged on a cylinder cover and is in driving connection with a rocker arm; the guide pipe is arranged on the valve assembly and is provided with a hollow accommodating cavity; the guide post is arranged on the cylinder cover and is inserted into the accommodating cavity; the rocker arm can drive the valve assembly to move along the axial direction of the guide post; and the elastic piece is arranged in the accommodating cavity and is abutted against the guide post. The utility model can inhibit the phenomenon of flying off of the valve train and ensure the valve seating consistency.

Description

Valve mechanism and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a valve actuating mechanism and an engine.

Background

The valve in the existing valve actuating mechanism is only supported by a spring on the valve, is limited by the installation position and the reliability of the spring, is easy to generate the phenomenon of valve actuating mechanism flying off when the rotating speed of an engine is higher (when the rotating speed of the engine is higher, the rotating speed of a cam is higher, the inertia force on the valve is larger than the spring force of the valve, the spring is not enough to support the movement of the valve actuating mechanism, so that the valve is not controlled by the cam), and is easy to break. Aiming at the problem of flying off of a valve mechanism of an engine, the most effective method is to increase the elastic force of a valve spring at present, but the method is limited by the limitation of installation space, and the size of the spring is not easy to change. And the existing valve bridge is of a structure without guide, the valve bridge can generate deflection influence in the motion process, and the seating of the valve is inconsistent.

Therefore, a valve train and an engine are needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a valve mechanism and an engine, which can inhibit the phenomenon of valve mechanism flying off and ensure the valve seating consistency.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a valve train comprising:

the valve assembly is arranged on the cylinder cover and is in driving connection with the rocker arm;

the guide pipe is arranged on the valve assembly and is provided with a hollow accommodating cavity;

the guide post is arranged on the cylinder cover and inserted into the accommodating cavity, and the rocker arm can drive the valve assembly to move along the axial direction of the guide post;

and the elastic piece is arranged in the accommodating cavity and is abutted against the guide post.

Further, the valve assembly comprises a valve bridge, a first valve and a second valve, the first valve and the second valve are arranged on the cylinder cover at intervals in parallel, one end of the valve bridge is connected with the first valve, the other end of the valve bridge is connected with the second valve, the valve bridge is in driving connection with the rocker arm, and the guide pipe is arranged on the valve bridge.

Further, the valve bridge and the guide pipe are of an integrated structure.

Furthermore, the valve bridge is screwed with an adjusting piece, one end of the adjusting piece is abutted to the upper end face of the first valve, and the adjusting piece is used for adjusting the extending length of the first valve relative to the valve bridge so as to keep the valve bridge horizontal.

Furthermore, a locking nut is screwed on the adjusting piece and used for locking the relative position of the adjusting piece and the valve bridge.

Furthermore, the elastic part is a compression spring, a positioning bulge is convexly arranged at the upper end of the guide post, and a sleeve of the compression spring is arranged on the positioning bulge.

Furthermore, the side face of one end, far away from the elastic part, of the guide post is provided with a limiting bulge.

Further, an oil inlet channel and an oil outlet channel are formed in the valve bridge, and the oil inlet channel and the oil outlet channel are communicated with the accommodating cavity.

Further, the oil outlet channel is arranged on the valve bridge in an inclined mode.

An engine comprising a valve train as described above.

The utility model has the beneficial effects that:

according to the valve mechanism provided by the utility model, the guide pipe is arranged on the valve assembly, the guide post is arranged on the cylinder cover and inserted into the accommodating cavity of the guide pipe, and the guide post and the guide pipe are matched to guide the movement of the valve assembly, so that deflection in the movement is prevented, and the valves are seated consistently; through being provided with the elastic component in the holding chamber, the one end and the guide post butt of elastic component support the stand pipe and then support valve assembly through the elastic component to increased the holding power to valve assembly, can restrain the phenomenon that the valve mechanism takes off with flying to appear.

The engine provided by the utility model comprises the valve mechanism, can inhibit the phenomenon of valve mechanism flying off, and can ensure the valve seating consistency.

Drawings

FIG. 1 is a schematic illustration of a valve train of the present invention;

FIG. 2 is a cross-sectional view of a valve train of the present invention;

FIG. 3 is a side cross-sectional view of a valve bridge in a gas distribution mechanism of the present invention;

FIG. 4 is a cross-sectional view of a guide post in a valve train according to the present invention.

In the figure:

1. a valve assembly; 11. a valve bridge; 111. an oil inlet channel; 112. an oil outlet channel; 113. a guide tube; 12. a first valve; 13. a second valve; 2. a rocker arm; 3. a cylinder head; 4. an elastic member; 5. a guide post; 51. positioning the projection; 52. a limiting bulge; 6. an adjustment member; 61. and locking the nut.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In order to suppress the occurrence of valve train runaway and to ensure valve seating consistency, the present invention provides a valve train, as shown in fig. 1-4. This valve timing mechanism includes: valve assembly 1, guide tube 113, guide post 5 and elastic member 4.

Wherein, the valve assembly 1 is arranged on the cylinder cover 3 and is in driving connection with the rocker arm 2; the guide pipe 113 is arranged on the valve component 1, and the guide pipe 113 is provided with a hollow accommodating cavity; the guide post 5 is fixedly arranged on the cylinder cover 3 and is inserted into the accommodating cavity; the rocker arm 2 can drive the valve assembly 1 to move along the axial direction of the guide column 5; the elastic piece 4 is arranged in the accommodating cavity and is abutted with the guide post 5.

The guide post 5 is matched with the guide pipe 113 to guide the movement of the valve assembly 1, so that deflection in the movement is prevented, and the valves are seated consistently; through being provided with elastic component 4 in the holding chamber, the one end and the guide post 5 butt of elastic component 4 support and then support valve assembly 1 through elastic component 4 to guide tube 113 to increased the holding power to valve assembly 1, can restrain the phenomenon that the valve mechanism takes off by flight.

Further, the valve assembly 1 comprises a valve bridge 11, a first valve 12 and a second valve 13, the first valve 12 and the second valve 13 are arranged on the cylinder cover 3 in parallel at intervals, one end of the valve bridge 11 is connected with the first valve 12, the other end of the valve bridge is connected with the second valve 13, the valve bridge 11 is in driving connection with the rocker arm 2, and the guide pipe 113 is arranged on the valve bridge 11. The rocker arm 2 drives the valve bridge 11, and the valve bridge 11 drives the first valve 12 and the second valve 13 to move, so that the valves are opened and closed.

Further, the valve bridge 11 and the guide pipe 113 are of an integrated structure. By integrating the valve bridge 11 and the guide pipe 113, the connection strength between the valve bridge 11 and the guide pipe 113 can be ensured, and when the engine is assembled, the installation procedure is reduced, and the assembly speed is increased.

Furthermore, an adjusting piece 6 is screwed on the valve bridge 11, one end of the adjusting piece 6 is abutted to the upper end face of the first valve 12, and the adjusting piece 6 is used for adjusting the extending length of the first valve 12 relative to the valve bridge 11 so as to keep the valve bridge 11 horizontal. Specifically, when the first valve 12 and the second valve 13 are installed, the first valve 12 is adjusted through the adjusting piece 6, so that the valve bridge 11 is kept horizontal after the first valve 12 and the second valve 13 are installed on the cylinder head 3, and when the first valve 12 and the second valve 13 are driven by the valve bridge 11 to move, the valve assembly 1 cannot move due to interference between the guide pipe 113 and the guide post 5. In order to facilitate screwing of the adjusting element 6, a recess is provided in the upper end face of the adjusting element 6, through which a tool screws the adjusting element 6.

In order to prevent the adjusting member 6 from being loosened due to vibration and the position of the first valve 12 relative to the valve bridge 11 from being changed due to vibration generated during operation of the engine, and the valve bridge 11 is deflected, and interference is generated between the guide tube 113 and the guide post 5, further, a lock nut 61 is screwed on the adjusting member 6, and the lock nut 61 is used for locking the relative position of the adjusting member 6 and the valve bridge 11. The locking nut 61 is arranged to ensure that the adjusting part 6 is not affected by engine vibration, thereby ensuring that the valve assembly 1 works normally.

Furthermore, the elastic element 4 is a compression spring, the upper end of the guide post 5 is convexly provided with a positioning protrusion 51, and one end of the compression spring is sleeved on the positioning protrusion 51. The mounting of the elastic member 4 is facilitated by providing the positioning projection 51 on the guide post 5.

Further, the side of the guide post 5 away from one end of the elastic element 4 is provided with a limiting protrusion 52. By arranging the limiting protrusion 52, the distance of the relative movement between the guide post 5 and the guide tube 113 is limited, and the elastic element 4 is prevented from being damaged due to over-compression of the elastic element 4 in the relative movement process between the guide tube 113 and the guide post 5.

Further, an oil inlet channel 111 and an oil outlet channel 112 are formed in the valve bridge 11, and the oil inlet channel 111 and the oil outlet channel 112 are communicated with the accommodating cavity. Lubricating oil enters the accommodating cavity through the oil inlet channel 111 and is discharged through the oil outlet channel 112, so that the guide pipe 113 and the guide column 5 are lubricated, an oil film is formed between the inner wall of the guide pipe 113 and the outer peripheral surface of the guide column 5, the smoothness of relative motion between the guide column 5 and the guide pipe 113 is ensured, and the normal work of the valve assembly 1 is ensured.

In order to prevent the oil outlet channel 112 from being arranged on the valve bridge 11, which would impair the structural strength of the valve bridge 11, the oil outlet channel 112 is further arranged obliquely on the valve bridge 11. The strength of the valve bridge 11 is ensured by obliquely arranging the oil outlet passage 112 away from the weak position of the valve bridge 11.

The embodiment also provides an engine which comprises the valve mechanism, can inhibit the phenomenon that the valve mechanism flies off, and ensures that the valves are seated consistently.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A valve train, comprising:

the valve assembly (1) is arranged on the cylinder cover (3) and is in driving connection with the rocker arm (2);

the guide pipe (113) is arranged on the valve assembly (1) and is provided with a hollow accommodating cavity;

the guide post (5) is arranged on the cylinder cover (3) and is inserted into the accommodating cavity, and the rocker arm (2) can drive the valve assembly (1) to move along the axial direction of the guide post (5);

and the elastic piece (4) is arranged in the accommodating cavity and is abutted against the guide post (5).

2. A valve gear according to claim 1, characterized in that the valve assembly (1) comprises a valve bridge (11), a first valve (12) and a second valve (13), the first valve (12) and the second valve (13) are arranged in parallel and at an interval on the cylinder head (3), one end of the valve bridge (11) is connected with the first valve (12), the other end is connected with the second valve (13), the valve bridge (11) is in driving connection with the rocker arm (2), and the guide pipe (113) is arranged on the valve bridge (11).

3. A valve train according to claim 2, wherein the valve bridge (11) is of integral construction with the guide tube (113).

4. A valve gear according to claim 2, characterised in that an adjusting piece (6) is screwed on the valve bridge (11), one end of the adjusting piece (6) is abutted against the upper end face of the first valve (12), and the adjusting piece (6) is used for adjusting the protruding length of the first valve (12) relative to the valve bridge (11) so as to keep the valve bridge (11) horizontal.

5. Valve train according to claim 4, wherein a locking nut (61) is screwed onto the adjusting part (6), the locking nut (61) being used to lock the relative position of the adjusting part (6) and the valve bridge (11).

6. A valve gear according to claim 1, wherein the elastic member (4) is a compression spring, the upper end of the guide post (5) is provided with a positioning protrusion (51) in a protruding manner, and one end of the compression spring is sleeved on the positioning protrusion (51).

7. Valve train according to claim 1, wherein the guide post (5) is provided with a stop protrusion (52) on the side of the end facing away from the spring element (4).

8. The valve actuating mechanism according to claim 2, wherein the valve bridge (11) is provided with an oil inlet passage (111) and an oil outlet passage (112), and the oil inlet passage (111) and the oil outlet passage (112) are both communicated with the accommodating cavity.

9. Valve train according to claim 8, wherein the oil outlet channel (112) is arranged inclined on the valve bridge (11).

10. An engine comprising a valve train according to any one of claims 1 to 9.